JP2009077692A - Opening / closing operation device of threshing device and combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily deal with cereal clogging by enabling easy release of the upper case at a work position even when cereal clogging occurs in a threshing path.
SOLUTION: Fixing means (58) configured to be switchable between a fixed state that prevents an opening operation of the upper case from a working position and a release state that permits the opening operation, and an opening / closing driving means that opens and closes the upper case ( 51), an opening / closing command means (48) for instructing opening and closing operations of the upper case, switching drive means (68, 70) for switching and driving the fixing means, and a control means (50) for instructing the opening operation. When the opening / closing drive means (51) is operated to the closing operation side of the upper case, the fixing means (58) is switched from the fixed state to the released state, and then the switching drive is performed to open the upper case. An opening / closing operation device for a threshing device configured to control the operation of the means (68, 70) and the opening / closing drive means (51).
[Selection] FIG.

Description

  According to the present invention, an upper case provided with a handling cylinder is opened and closed between a lower case provided with a receiving net and a work position where the handling cylinder is close to the receiving net and a maintenance position where the handling cylinder is separated from the receiving net. A fixing means that is operably connected and configured to be able to switch between a fixed state that prevents the opening operation of the upper case from the working position and a release state that allows the opening operation, and driving the upper case to open and close An opening / closing operation device for a threshing apparatus, comprising: an opening / closing drive means; a control means for controlling the operation of the opening / closing drive means; and an opening / closing command means for instructing the control means to open and close the upper case. It is related with the combine equipped with.

As the opening / closing operation structure of the threshing device as described above, a pair of lock rods swingably mounted on the upper structure (upper case), a pair of lock pins fixed on the main structure (lower case), etc. The hook part of each lock hook engages with the corresponding lock pin, so that the upper structure is locked in the lowered closed position (working position), and the hook part of each lock hook releases the engagement with the corresponding lock pin. Thus, a lock mechanism (fixing means) configured to release the lock of the upper structure at the lowered closed position is provided, and the lock release operation of the lock mechanism is performed using a handle 杆 that connects the pair of lock 杆 s. There is one configured to perform the operation by using a man-made operation (see, for example, Patent Document 1).
Japanese Patent No. 3683148 (paragraph numbers 0034 and 0035 and FIGS. 4 and 5)

  In the above configuration, when the cereal grain clogging occurs in the threshing path formed between the receiving net and the handling cylinder, there is a disadvantage that the engagement between the hook portion and the lock pin becomes strong due to the clogging. Therefore, since it becomes difficult to perform the engagement release by human operation, it takes time to release the fixation of the upper case at the work position. As a result, the countermeasure against cereal clogging in the threshing path, which is possible when the upper case is opened to the maintenance position, is delayed, resulting in a reduction in work efficiency.

  An object of the present invention is to enable easy release of the upper case at the work position even when cereal clogging occurs in the threshing path, and to quickly cope with cereal clogging in the threshing path. It is to be able to do it.

In order to achieve the above object, the opening / closing operation device of the threshing apparatus according to the present invention includes a lower case provided with a receiving net, an upper case provided with a handling cylinder, and an operation in which the handling cylinder is close to the receiving net. A fixed state that prevents the opening operation of the upper case from the working position, and a release state that permits the opening operation. Fixing means configured to be switchable, opening / closing driving means for driving to open / close the upper case, control means for controlling the operation of the opening / closing driving means, and instructions for opening and closing the upper case to the control means Open / close command means to be provided,
The first characteristic configuration is provided with switching drive means for switching and driving the fixing means, and when the control means is instructed to open by the opening / closing command means, the opening / closing drive means is closed by the upper case. The operation of the switching drive means and the opening / closing drive means is controlled so as to switch the fixing means from the fixed state to the released state in the state of being operated on the operation side, and then to open the upper case. It is in the point which is comprised.

  That is, when an opening operation is commanded by the opening / closing command means, the control means controls the switching drive means, and the switching drive means switches the fixing means from the fixed state to the released state. In the threshing path formed during the cutting, the harvested cereals are clogged, and due to the clogging, even if the fixation at the work position of the upper case by the fixing means becomes strong, Switching to the release state can be easily performed by operating the switching drive means, and the opening operation of the upper case from the work position to the maintenance position can be performed quickly.

  Moreover, the control means controls the operation of the opening / closing driving means to operate the opening / closing driving means to the closing operation side of the upper case when controlling the switching driving means to switch the fixing means from the fixed state to the released state. Since the upper case is pushed up toward the maintenance position due to clogging of the harvested cereals in the threshing path, the fixing at the working position of the upper case by the fixing means is strong. However, when the upper case is operated to the closing operation side by the opening / closing drive means, the harvested cereals packed in the threshing path are compressed, and the upper case is lowered to the side away from the maintenance position, so that the upper case is It is precisely located at the work position and can be loosened by the fixing means at the work position of the upper case.

  Therefore, the fixing means can be switched from the fixed state to the released state while the upper case is loosely fixed at the working position, so that when the opening operation is instructed by the opening / closing command means, the fixing means is The release state can be surely switched.

  As described above, according to the first characteristic configuration of the present invention, it is possible to improve the operability when opening and closing the upper case, and it is possible to quickly cope with cereal clogging in the threshing route, and as a result, work Efficiency can be improved.

  The second characteristic configuration of the opening / closing operation device of the threshing device according to the present invention is the first characteristic configuration, further comprising a threshing clutch sensor that detects an operating state of the threshing clutch that intermittently transmits power to the barrel. However, when the threshing clutch is in the engaged state based on the detection information of the threshing clutch sensor, the switching drive means and the opening / closing drive means are not operated even if an opening operation is commanded by the opening / closing command means. It is in the point comprised as follows.

  That is, if the threshing clutch is in the engaged state, the threshing clutch sensor detects this, and the control means does not operate the switching drive means and the opening / closing drive means even if an opening operation is commanded by the opening / closing command means. When opening the upper case to the maintenance position, it becomes necessary to switch the threshing clutch to the disengaged state.

  Therefore, if the upper case is opened to the maintenance position and maintenance is performed on the threshing device while improving the operability when opening the upper case, it is assumed that you forgot to stop the engine. In addition, due to the configuration of the opening / closing drive means, even if it is necessary to operate the engine when opening the upper case, the operation of the threshing device whose handling cylinder has stopped from the stage before opening the upper case is stopped. In the state, maintenance for the threshing device can be performed, and the maintenance can be performed in a state where the work can be easily performed appropriately.

  Thus, according to the second characteristic configuration of the present invention, even when cereal clogging occurs in the threshing path, it is possible to easily release the fixation at the work position of the upper case, It is possible to quickly cope with cereal clogging and to perform maintenance in a state where it is easy to perform work appropriately.

  A third characteristic configuration of the opening / closing operation device of the threshing apparatus according to the present invention is the second characteristic configuration, further comprising: a fixed state detection unit that detects that the fixing unit is in a fixed state, and the control unit includes the fixed unit Based on the detection information of the state detection means, when the fixing means is not in the fixed state, the clutch switching means for switching the operating state of the threshing clutch is not operated.

  That is, when the fixing means is not in the fixed state, the fixed state detecting means detects this so that the control means does not operate the clutch switching means for switching the operating state of the threshing clutch. After the opening operation is commanded and the fixing means is switched to the released state, the clutch switching means does not operate until the fixing means is switched from the released state to the fixed state.

  Therefore, after the opening operation is commanded by the opening / closing command means and the fixing means is not in the fixed state, the closing operation is commanded by the opening / closing command means, the upper case is closed, and the fixing means is switched to the fixed state. Since the operation stop state of the threshing device with the handling cylinder stopped is maintained during the maintenance period, it is possible to prevent the handling cylinder from starting during the maintenance work and to prevent the maintenance work from being performed. It is possible to maintain an appropriate working state.

  Thus, according to the third characteristic configuration of the present invention, even when cereal clogging occurs in the threshing path, it is possible to easily release the fixing at the work position of the upper case, It is possible to quickly cope with cereal clogging and to maintain an appropriate work state for performing maintenance work.

  According to a fourth feature configuration of the article processing system of the present invention, in any one of the first to third feature configurations, the unloader that discharges the grain processed by the threshing device is freely rotatable in the upper space of the threshing device. And a swing position detecting means for detecting the swing position of the unloader and a lift position detecting means for detecting the lift position, and the control means includes the swing position detecting means and the lift position detecting means. If it is determined that the unloader is located at a position where it interferes with the unloader when the upper case is opened based on the detection information of the means, The switching drive means and the opening / closing drive means are configured not to operate.

  That is, when the turning position and the lifting position of the unloader are positions where the upper case and the unloader interfere when the upper case is opened, the control means detects the detection information of the turning position detection means and the lifting position detection means. Therefore, when the upper case is opened, it is determined that the unloader is located at a position where it interferes with the unloader, and the switching drive means and the opening / closing drive means are not operated even when the opening / closing command means instructs opening.

  Therefore, without opening the upper case, the operator operates the opening / closing command means without noticing that the unloader is positioned so that the unloader and the upper case interfere with each other. Even when instructed to do so, the switching drive means and the opening / closing drive means are not operated by the control means and the upper case is not opened, so that contact between the unloader and the upper case is avoided. It is possible to prevent the unloader and the upper case from being damaged by opening the case.

  Thus, according to the fourth characteristic configuration of the present invention, even when cereal clogging occurs in the threshing path, it is possible to easily release the fixing at the work position of the upper case, and It came to obtain a combine that can quickly deal with cereal clogging and that can prevent the unloader and the upper case from being damaged by the opening operation of the upper case.

  FIG. 1 shows the entire side surface of the self-removable combine, and FIG. 2 shows the entire plane. This combine is formed by a pair of left and right crawlers at the lower part of a body frame 1 formed into a frame shape by a square pipe material or the like. Type cutting device 2 is installed, a cutting and conveying device 3 is connected to the front portion of the body frame 1 so as to be able to move up and down, a threshing device 4 is mounted on the left half of the body frame 1, and a threshing device 4 is disposed at the rear portion The straw conveying device 5 and the waste straw shredding device 6 are connected, a grain tank 7 is mounted on the right rear portion of the vehicle body frame 1, a screw conveyance type unloader 8 is provided in the grain tank 7, and the right front of the vehicle body frame 1 is provided. The engine 9 is mounted on the part, and a cabin 10 that forms a boarding operation part is provided.

  Although not shown, the left and right crawler type traveling devices 2 are driven by the power transmitted from the engine 9 via the main transmission device, the auxiliary transmission device, and the like, and are provided with a main transmission lever and an auxiliary transmission lever provided in the boarding operation unit. In this drive state, the cross swing type and neutral return type control lever provided in the boarding operation unit is driven straight at a constant speed based on the horizontal swing operation of the control lever. The state is switched to a turning traveling state in which they are differential.

  In the cutting and conveying device 3, the power from the engine 9 is transmitted through the main transmission, the cutting clutch, and the like, and the cutting clutch is intermittently operated based on the operation of the cutting clutch lever provided in the boarding operation unit. The operation state is switched between the operation state and the stop state. In the operation state, as the vehicle body travels, a predetermined number of planted cereals to be harvested are sprouted and caused, and the stock side is cut off. Then, the cut cereal culm (cutted cereal culm) after being cut is conveyed toward the rear threshing device 4 while changing the posture from the standing posture to the sideways posture. Moreover, it raises / lowers by operating the cutting elevating mechanism based on the swinging operation of the control lever in the front-rear direction.

  In the threshing device 4, the power from the engine 9 is transmitted via a threshing clutch or the like, and the forward / reverse rotation of the threshing clutch switching motor (an example of the clutch switching means) 102 based on the operation of the threshing clutch lever provided in the boarding operation unit. When the belt tension type threshing clutch is intermittently operated by driving, it is switched between an activated state and a stopped state. On the other hand, while carrying out the threshing process, it is conveyed toward the rear waste straw conveying device 5, the processed product obtained by the threshing process is subjected to the sorting process, and the single item selected as the first item by the sorting process. Grained grains are supplied to the grain tank 6 and unthreshed grains such as grain with branch branch selected as No. 2 are subjected to threshing treatment and sorting again and sorted as No. 3 Dust, such as a cut straw and straw waste, which is discharged to the outside of the vehicle.

  The waste straw conveying device 5 is driven by the power from the threshing device 4. In the driven state, the waste straw conveying device 5 receives the harvested cereals (the waste straw) after the threshing processing from the threshing device 4 and above the waste straw shredding device 6. Transport toward. The waste straw shredding device 6 is driven by the power from the threshing device 4, and a long straw discharge state in which the waste straw from the waste straw shredding device 6 is guided to the rear of the vehicle as it is and released outside the vehicle, and shredding processing It can be switched to a shredded discharge state that is released to the outside of the vehicle.

  The unloader 8 is stored in the grain tank 7 when the power from the engine 9 is transmitted via a discharge clutch or the like, and the discharge clutch is intermittently operated based on the operation of the discharge switch provided in the boarding operation unit. It can be switched between an operating state and a stopped state in which the single grain is discharged outside the vehicle. In addition, the discharge cylinder 8A (see FIGS. 1 and 2) swings up and down by operating the discharge raising / lowering mechanism based on the operation of the lift switch provided in the boarding operation unit, and the swing switch provided in the boarding operation unit is operated. Based on the operation, the discharge cylinder 8A is rotated by the operation of the discharge turning mechanism, and thus the single-grained grains stored in the grain tank 7 can be discharged to a desired discharge position such as a truck bed. it can. Thus, the unloader 8 is provided in a space above the threshing device 4 so that it can be swiveled and lifted and lowered.

  As shown in FIGS. 3 to 11, the threshing device 4 is formed in a processing space formed by a lower case 11 connected to the vehicle body frame 1 and an upper case 12 connected to the lower case 11 so as to be opened and closed. A threshing unit 13, a sorting unit 14, and a collecting unit 15 are provided.

  The threshing unit 13 includes a receiving chamber 16 detachably laid on the upper left side of the lower case 11 and an upper case 12, and a handling chamber 17 is formed between the handling cylinder 18 provided in the upper case 12 and the receiving net 16. A threshing path 19 is formed and the feed chain 20 provided at the upper left end of the lower case 11 and the holding rail 21 provided at the lower left end of the upper case 12 are cut so that the tip side of the harvested cereal passes through the threshing path 19. A holding and conveying mechanism 22 configured to hold and transfer the grain side of the cereal rice cake backward is configured.

  The receiving net 16 is a grid-like concave receiving net that is formed in an arc shape that curves along the outer periphery of the handling cylinder 18 and that can be divided into two in the circumferential direction of the handling cylinder 18. However, the arcuate support frame 23 provided on the front wall 11A of the lower case 11 is supported so as to be relatively slidable in the circumferential direction of the handling cylinder 18, and the rear end thereof is provided on the auxiliary wall 11B of the lower case 11. The lower case is supported by the arc-shaped support frame 24 so as to be relatively slidable in the circumferential direction of the handling cylinder 18, and is fixed to the lower case 11 and moved along the front and rear support frames 23 and 24. 11 can be attached to and detached from the left end.

  The front wall 11A of the lower case 11 functions as a support member that receives and supports the front wall 12A of the upper case 12, and the auxiliary wall 11B of the lower case 11 functions as a support member that receives and supports the rear wall 12B of the upper case 12. Is configured to do.

  The handling cylinder 18 is configured by supporting a first processing cylinder 18A and a second processing cylinder 18B on a support shaft 25 extending in the front-rear direction across the front wall 12A and the rear wall 12B of the upper case 12 so as to be relatively rotatable. With the two front and rear divided structures, the processing cylinders 18A and 18B are rotated around the support shaft 25 as a fulcrum, and are conveyed to the threshing path 19 by a plurality of teeth 18a and 18b provided on the outer periphery thereof. While performing the threshing process on the tip side of the harvested cereal culm, the processed product obtained by the threshing process leaked from the receiving net 16 toward the sorting unit 14 and did not leak from the receiving net 16 The processed material is discharged toward the sorting unit 14 from a dust feeding port 26 formed at the bottom of the support frame 24 on the rear side.

  In the first processing cylinder 18A, the engine power transmitted to the threshing device 4 via the threshing clutch is distributed and supplied to the input pulley 27 integrally provided at the front end portion thereof via the first transmission belt 28 and the like. With the support shaft 25 as a fulcrum, it rotates clockwise as viewed from the front at a speed slower than that of the second processing cylinder 18B.

  In the second processing cylinder 18B, the engine power distributed by the first transmission belt 28 is transmitted to the input pulley 29 integrally provided at the rear end thereof via the transmission shaft 30 and the second transmission belt 31 facing forward and backward. As a result, with the support shaft 25 as a fulcrum, it rotates clockwise as viewed from the front at a speed faster than the first processing cylinder 18A.

  The sorting unit 14 includes a swing sorting mechanism 32 that includes a coarse sorting unit 32A and a fine sorting unit 32B, a main tang 33, a first sub tang 34, a second sub tang 35, and a dust outlet. 26, and a dust exhaust fan 37 that sucks and discharges dust such as straw scraps blown by the sorting air, and the like. The engine power transmitted to the threshing device 4 via the threshing clutch is distributed and supplied via a transmission belt and the like not shown.

  The swing sorting mechanism 32 is driven to swing by distributed power, so that the coarse sorting unit 32A can handle the processed material leaked from the receiving net 16 of the threshing unit 13 and the processed product carried out from the dust feed port 26. The sieving and sorting process was performed, and cut straws, straw scraps, etc. were formed on the rear wall 11C of the lower frame 11 while leaking the single grains and unthreshed grains of those processed products. It is transported toward the dust outlet 11a and discharged out of the vehicle from the dust outlet 11a. In addition, the fine sorting unit 32B performs sieving selection on the unigrained grains and unthreshed grains leaked from the coarse sorting section 32A, and the unthreshed grains etc. Move toward the lower side of the sorting direction).

  The main tang 33 is rotationally driven by the distribution power to generate a sorting wind that flows from the front lower side of the fine sorting unit 32B toward the dust outlet 11a and is included in the processed product from the coarse sorting unit 32A. Dust such as straw scraps is conveyed by wind toward the dust outlet 11a.

  The first auxiliary tang 33 is rotationally driven by the distribution power, thereby generating a sorting wind that flows from the front lower portion of the coarse sorting portion 32A toward the dust outlet 11a, to the processed material from the receiving net 16 The contained dust such as straw scraps is conveyed by wind toward the dust outlet 11a.

  The second sub-carp 35 is rotationally driven by the distribution power to generate a sorting wind that flows from the lower rear of the fine sorting unit 32B toward the dust outlet 11a, and the processing from the rear of the coarse sorting unit 32A. Dust such as straw scraps contained in the object is conveyed by wind toward the dust outlet 11a.

  The diffusion drum 36 is rotationally driven with distributed power to loosen the processed product discharged from the dust feed port 26 to the coarse sorting unit 32A, and to obtain a single grain or unthreshed grain contained in the processed product. The leakage from the rough sorting unit 32A is promoted.

  The dust exhaust fan 37 is driven to rotate by distributed power, and thereby sucks dust such as straw scraps conveyed by wind with the sorting wind and discharges it from the dust outlet 11a to the outside of the vehicle.

  As a result, the processed product from the threshing unit 13 is a single granulated grain that leaks from the fine sorting unit 32B, an unthreshed grain as the second product that is supplied behind the fine sorting unit 32B, and the like. Can be selected with high accuracy, such as foreign matter containing dust, and dust such as cut straw and straw scraps as the third thing discharged from the dust outlet 11a.

  The collecting unit 15 collects the single grain that has leaked from the fine sorting unit 32B by the first collecting unit 38 formed below the fine sorting unit 32B, and has not yet leaked from the fine sorting unit 32B. The grains, unthreshed grains that have leaked from the rear part of the coarse sorting section 32A, and the like are collected by a second collection section 39 formed behind the first collection section 38.

  Engine power transmitted to the threshing device 4 via the threshing clutch is distributed and supplied to the recovery unit 15 via a transmission belt or the like (not shown), and this power is provided at the bottom of the first recovery unit 38. The first screw 40 and the first vertical screw 41 erected over the right end portion and the upper end portion of the grain tank 7 are driven so that the single-grained grains recovered by the first recovery portion 38 can be obtained. Supply and transport toward the grain tank 7. Further, the second recovery unit 39 is driven by driving the second screw 42 provided at the bottom of the second recovery unit 39 and the second reduction screw 43 erected over the right end of the second recovery unit 39 and the upper part of the selection unit 14. The mixture collected in the above step is conveyed toward the upper end of the second reduction screw 43 and discharged and reduced from the upper end toward the front of the swing sorting mechanism 32.

  The 2nd reduction screw 43 is equipped with the 2nd processing copper (not shown) which performs a threshing process with respect to the mixture collect | recovered by the 2nd collection | recovery part 39. FIG.

  A reinforcement frame 44 that reinforces the upper portion of the lower case 11 by connecting the front wall 11A and the auxiliary wall 11B is disposed at the upper right portion of the lower case 11. The reinforcing frame 44 is made of a round pipe material or the like so as to have a function as a transmission case that houses the transmission shaft 30 and a function as a support shaft that supports the upper case 12 so as to be swingable up and down.

  The front case 12A and the rear wall 12B of the upper case 12 are connected to brackets 45 and 46 that are rotatably supported at both front and rear ends of the reinforcing frame 44, whereby the reinforcing frame 44 serves as a fulcrum. The lower case 11 is allowed to swing up and down.

  That is, the upper case 12 is connected to the lower case 11 so as to be opened and closed with respect to the lower case 11 by swinging up and down with the reinforcing frame 44 as a fulcrum.

  The swinging fulcrum portion of the upper case 12 is reinforced by a reinforcing frame 47 made of a square pipe material or the like that extends over the front and rear brackets 45 and 46.

  As shown in FIGS. 4 to 15, the opening / closing operation of the upper case 12 is based on the opening operation command and the closing operation command from the command means 48 and the opening / closing position of the upper case 12 detected by the opening / closing position detection means 49. The control device 50 configured with a microcomputer or the like controls the operation of the opening / closing drive means 51 for opening / closing the upper case 12.

  The command means 48 includes an open switch 52 and a close switch 53 that are automatic return type push button switches provided in the boarding operation section. The open switch 52 and the close switch 53 are constituted by a momentary switch that outputs a contact signal when a pressing operation is performed against the return bias from the non-operation position and the switch is positioned at the operation position. Outputs an opening operation command to the control device 50 while being pressed to the operation position, and the close switch 53 issues a closing operation command to the control device 50 while being pressed to the operation position. Output (see FIG. 12).

  That is, the command means 48 has an open switch 52 as an open operation command operating section that can command the opening operation of the upper case 12 and a close switch 53 as a command operation section for closing operation that can command the closing operation of the upper case 12. Each of the open switch 52 and the close switch 53 is provided in a state in which it is urged to return to the non-operation position, and when it is operated to the operation position, a corresponding operation on the upper case 12 is performed. Is configured to command.

  The open / close position detecting means 49 is composed of a rotary potentiometer, and the reinforcing frame 44 is supported on a fulcrum via a linkage arm 54 and the like that is spring-biased so as to maintain the state of contact with the front bracket 45 from above. The swing angle of the front bracket 45 is detected as the open / close position of the upper case 12 (see FIGS. 13 to 15).

  Based on the command information from the open switch 52 or the close switch 53 and the detection information from the open / close position detection means 49, the control device 50 determines that the upper case 12 has a preset work position, first maintenance position, and second maintenance position. The operation of the opening / closing drive means 51 is controlled so as to be switched and held at a position corresponding to the command information among the three positions (see FIG. 12).

  The working position is a fully closed position where the front wall 12A and the rear wall 12B of the upper case 12 are received and supported by the front wall 11A and the auxiliary wall 11B of the lower case 11, and in this position, the harvested cereal by the holding and conveying mechanism 22 The holding rail 21 is close to the feed chain 20 so that the straw can be held and conveyed, and the handling cylinder 18 is close to the receiving net 16 so that the threshing process can be performed on the harvested cereal by the handling cylinder 18. (See FIGS. 5 to 9 and FIG. 13).

  The first maintenance position is a fully open position in which the upper case 12 is farthest away from the lower case 11 by the operation of the opening / closing drive means 51. At this position, the space between the receiving net 16 and the handling cylinder 18 is greatly opened. The handling cylinder 18 and the holding rail 21 are separated from the receiving net 16 and the feed chain 20 (see FIGS. 11 and 15).

  The second maintenance position is an opening / closing midway position where the lowermost portion of the handling cylinder 18 is located at substantially the same height as the height on the conveying surface side of the feed chain 20 facing the holding rail 21. The barrel 18 and the clamping rail 21 are spaced relatively small from the receiving net 16 and the feed chain 20 so as to allow removal of the harvested cereal clogs in the threshing path 19 therebetween (see FIGS. 10 and 14). ).

  In other words, when performing threshing work, the upper case 12 is positioned at the working position so that the tip side of the harvested cereal rice cake passes between the receiving net 16 and the handling cylinder 18 so that the stock side of the harvested cereal meal rice cake. Can be sandwiched and transported by the sandwiching and transporting mechanism 22, and the threshing process by the handling cylinder 18 can be appropriately performed on the tip side.

  When cleaning the receiving net 16 and the handling cylinder 18 or exchanging the receiving net 16, the upper case 12 is positioned at the first maintenance position to clean the receiving net 16 and the handling cylinder 18. Maintenance of the receiving net 16 and the barrel 18 such as replacement of the 16 or repair of the teeth 18a and 18b can be easily performed.

  When the threshing path 19 is clogged with the harvested cereal meal, the upper case 12 is positioned at the second maintenance position to remove the clogged harvested grain meal from the threshing path 19 and to start the conveyance of the feed chain 20. Appropriate treatment for clogged cereals such as being placed on the part can be easily performed.

  Moreover, in the second maintenance position, the upper case 12 is obtained because the harvested cereal grains that have been held and conveyed by the clamping conveyance mechanism 22 are long, or mud adheres to the stock side of the harvested cereal grains. With the opening operation to the second maintenance position, the harvested cereal rice cake is weighted on the stock base side extending outward from the feed chain 20, and the tip side rises with the feed chain 20 as a fulcrum. Even if the posture is changed, the tip side is received by the handling cylinder 18 and is supported by the handling cylinder 18 and the feed chain 20, so that the downwardly inclined posture with the tip side greatly raised As a result, it is possible to avoid the slashing of the harvested cereals to the outside of the vehicle body due to the change of posture, and to pick up the sown cereals that have fallen. It is possible to eliminate the Mel effort.

  As shown in FIG. 4 and FIGS. 7 to 12, the opening / closing drive means 51 is a reciprocating hydraulic cylinder 55 installed over the lower case 11 and the upper case 12, and electromagnetic control for controlling the flow of hydraulic oil to the hydraulic cylinder 55. The upper case 12 is formed by a valve 56, a hydraulic pump 57 that pumps hydraulic oil toward the electromagnetic control valve 56, a relief valve that defines an upper limit of hydraulic oil pressure when the hydraulic cylinder 55 is operated to the contraction side, and the like. It is configured to be hydraulically driven to open and close with hydraulic pressure.

  The hydraulic cylinder 55 is disposed between the rear support frame 24 and the second reduction screw 43 erected on the right outer side so as to be positioned within the front-rear width of the support frame 24.

  That is, the hydraulic cylinder 55 leaks the processed material from the receiving net 16 to the swing sorting mechanism 32, discharges the processed product from the dust feed port 26 formed at the bottom of the support frame 24 to the swing sorting mechanism 32, and The second reduction screw 43 is disposed so as not to hinder the release reduction of the mixture from the upper end portion of the second reduction screw 43 to the front side of the swing sorting mechanism 32.

  The electromagnetic control valve 56 is a three-position switching type, and by the control operation of the control device 50, the hydraulic cylinder 55 is extended and the upper case 12 is moved up and swinged, and the hydraulic cylinder 55 is contracted and the upper case 12 is contracted. Is switched to a lowering position 56D for lowering and swinging and a stop position 56N for stopping expansion and contraction of the upper case 12 by stopping expansion and contraction of the hydraulic cylinder 55. The electromagnetic control valve 56 is urged to return to the stop position 56N, and is switched to the ascending position 56U and the descending position 56D by bringing the solenoid coil into an excited state, and to the stop position 56N by bringing it into a non-excited state. .

  The hydraulic pump 57 is linked to the engine 9 so as to be driven by power from the engine 9 (see FIG. 12). That is, the upper case 12 is configured to be opened / closed by hydraulic oil from the hydraulic pump 57 driven by engine power.

  As shown in FIGS. 5 to 8 and 12, the threshing device 4 has a fixed state that prevents the upper case 12 from being opened from the work position, and a release state that allows the upper case 12 to be opened from the work position. The fixing means 58 is configured to be switchable to each other, and the fixing means 58 includes a pair of front and rear fixing mechanisms 59 and 60.

  The front-side fixing mechanism 59 includes a first hook 62 that is provided on the front wall 11A of the lower case 11 so as to be swingable up and down via a longitudinal support shaft 61, and the front wall 12A of the upper case 12 to the front of the lower case 11. It is comprised by the 1st pin 64 which protruded forward at the extension end of the extension member 63 extended toward the wall 11A. The rear-side fixing mechanism 60 is equipped with a second pin 65 protruding rearward on the auxiliary wall 11B of the lower case 11 and a rear wall 12B of the upper case 12 that can swing up and down via a support shaft 66 facing front and rear. The second hook 67 is configured.

  The first hook 62 is integrally equipped with a sector gear 62 </ b> A that meshes with a pinion gear 69 driven by a first electric motor (an example of a switching drive means) 68 provided on the front wall 11 </ b> A of the lower case 11. In operation, the first pin 64 is pivotally driven with the support shaft 61 as a fulcrum over an engagement position where the first pin 64 is engaged from above and a non-engagement position where the engagement with the first pin 64 is released. .

  The second hook 67 is integrally equipped with a sector gear 67A that meshes with a pinion gear 71 driven by a second electric motor (an example of a switching drive means) 70 provided on the rear wall 12B of the upper case 12. In operation, the second pin 65 is oscillatingly driven with the support shaft 66 as a fulcrum over an engagement position where the second pin 65 is engaged from below and a non-engagement position where the engagement with the second pin 65 is released. .

  In other words, the fixing means 58 is switched to the fixed state by the first electric motor 68 and the second electric motor 70 being operated to swing the first hook 62 and the second hook 67 toward the engaging position. The first hook 62 and the second hook 67 are configured to switch to the released state by being driven to swing toward the non-engagement position.

  Thereby, even when the engagement of the first hook 62 or the second hook 67 with respect to the first pin 64 or the second pin 65 is strengthened due to the clogging of the harvested cereals in the threshing path 19 By the operation of the first electric motor 68 and the second electric motor 70, their engagement can be easily released, and it is possible to quickly cope with cereal clogging in the threshing path 19.

  Further, even when the engagement of the first hook 62 or the second hook 67 with respect to the first pin 64 or the second pin 65 becomes strong due to clogging of the harvested cereal meal, the first electric motor 68 and the second electric motor Before the motor 70 is operated, the electromagnetic control valve 56 is switched from the stop position 56N to the lowered position 56D, and the upper case 12 is pulled down to the working position as much as possible by the opening / closing drive means 51, whereby the first pin 64 Alternatively, the engagement of the first hook 62 or the second hook 67 with respect to the second pin 65 can be loosened, so that the first hook 62 and the second hook 67 are driven to swing toward the non-engagement position. It is possible to reduce the loads on the electric motor 68 and the second electric motor 70 and to operate these electric motors with certainty.

  As shown in FIGS. 5 to 8 and 12, the switching operation of the fixing means 58 includes command information from the open switch 52 or the close switch 53, detection information from the open / close position detection means 49, and an operation detection means 72 (fixation). The control device 50 controls the operation of the first electric motor 68 and the second electric motor 70 based on the operation state of the fixing means 58 detected by an example of the state detection means.

  The operation detecting means 72 includes a first position sensor 73 provided on the front wall 11A of the lower case 11 and a second position sensor 74 provided on the rear wall 12B of the upper case 12, and the first position sensor 73 is The swing position of the first hook 62 with the support shaft 61 as a fulcrum is constituted by a rotary potentiometer that detects via the linkage link 75, and the second position sensor 74 has a second position with the support shaft 66 as a fulcrum. It is composed of a rotary potentiometer that detects the swing operation position of the hook 67 via the linkage link 76.

  In other words, the operation detection means 72 detects that the first position sensor 73 has reached the engagement position of the first hook 62 and the second position sensor 74 has detected that the second hook 67 has reached the engagement position. Thus, the fixing state of the fixing means 58 is detected, the first position sensor 73 detects the arrival of the first hook 62 to the non-engagement position, and the second position sensor 74 is detected by the second hook 67. It is configured to detect the release state of the fixing means 58 by detecting the arrival at the non-engagement position.

  As shown in FIGS. 1 to 3, 7, 8, 16, and 17, the waste straw transporter 5 receives the waste straw transported by the sandwich transport mechanism 22, The lower end of the lower case 11 where the transfer terminal portion of the transfer mechanism 22 is located is arranged at the upper left of the rear portion. The lower case 11 is equipped with a support frame 77 that supports the conveyance start end of the waste straw conveying device 5. The support frame 77 is erected on the left rear end of the lower case 11, and detours from the upper wall 78 of the lower case 11 toward the transfer start end of the discharge fan transfer device 5 and bypasses the discharge wall transfer path 79 of the discharge wall transfer device 5. From the front and rear first frame 80 made of a round pipe material formed so as to extend, and the upper right frame 81 disposed in the front and rear direction on the upper right portion of the lower case 11, the transport start end portion of the discharge straw transport device 5 The second frame 82 is made of a round pipe material extending toward the left and right, and the like. The extended ends of the first frame 80 and the second frame 82 are welded.

  In the upper case 12, the upper left frame 83 made of a square pipe material arranged in the front-rear direction at the upper left portion of the upper case 12 is overlapped with the extended end portion (front end portion) of the first frame 80 at its extended end portion (rear end portion). As described above, the upper case 12 is extended between the extended end portion of the upper left frame 83 and the extended end portion of the first frame 80 that are extended toward the extended end portion of the first frame 80. When located, the connecting means 84 for detachably connecting the upper left frame 83 to the first frame 80 is provided.

  That is, the upper left frame 83 of the upper case 12 can be connected to the support frame 77 of the lower case 11 by the connecting means 84, whereby the transfer start end portion of the discharge wall transfer device 5 can be connected to the support frame 77 of the lower case 11. The upper left frame 83 of the upper case 12 can be supported with higher support strength and better stability.

  The connecting means 84 is configured by a fixing pin 85 provided in the front-rear direction at the extending end portion of the first frame 80 and a hook 87 integrally provided at the rear end portion of the front-rear rotation shaft 86 provided in the upper left frame 83. Has been.

  The pivot shaft 86 is engaged with the fixing pin 85 in conjunction with the operation of the second hook 67 to the engagement position, and the hook 87 is interlocked with the operation of the second hook 67 to the non-engagement position. Is interlocked with the second hook 67 via a bent link 88 so that the engagement with the fixing pin 85 is released.

  That is, the connection means 84 is switched to a connection state in which the upper left frame 83 is connected to the support frame 77 as the rear fixing mechanism 60 is switched to the fixed state by the operation of the second electric motor 70, and the rear As the side fixing mechanism 60 is switched to the release state, it is configured to switch to the release state in which the connection of the upper left frame 83 to the support frame 77 is released.

  As a result, the operability can be improved as compared with the case where the connecting means 84 is configured to be an artificially operated type, and the structure is compared with the case where a dedicated switching driving means for switching the connecting means 84 is provided. In addition, it is possible to avoid the forgetting operation of the connecting means 84 which may be caused when the connecting means 84 is operated independently.

  In addition, the upper case 12 positioned above the waste wall return path 79 is equipped with the second hook 67 of the fixing means 58, the second electric motor 70, and the hook 87 of the connecting means 84, so that the linkage can be achieved. As a result, it is possible to perform the operation without detouring the waste wall return path 79 as in the case where the lower case 11 is installed. As a result, the linkage configuration can be simplified.

  As shown in FIGS. 4 to 6, FIGS. 12 to 15, and FIG. 18, the threshing device 4 is equipped with a fall prevention mechanism 89 that prevents the upper case 12 from falling from the first maintenance position and the second maintenance position. Yes. The fall prevention mechanism 89 protrudes in the front-rear direction to the front wall 11A of the lower case 11 so that the front bracket 45 and the first recess 45a and the second recess 45b formed in the bracket 45 can be engaged from the front. An engaging pin 90 that is removably mounted, and an electric motor 92 for retracting and retracting the engaging pin 90 via a screw shaft 91 that is screwed into a female screw portion 90A formed on the engaging pin 90, etc. It is constituted by.

  The first recess 45a is formed at a position facing the engagement pin 90 when the upper case 12 is opened to the first maintenance position in the front bracket 45, and the second recess 45b is formed at the front bracket 45. The upper case 12 is formed at a position facing the engagement pin 90 when the upper case 12 is opened to the second maintenance position.

  That is, the fall prevention mechanism 89 prevents the upper case 12 from dropping from the first maintenance position by engaging the engagement pin 90 with the first recess 45a, and engages the engagement pin 90 with the second recess 45b. This prevents the upper case 12 from falling from the second maintenance position. As a result, even when hydraulic oil leaks when the upper case 12 is positioned at the first maintenance position or the second maintenance position, the upper case 12 can be reliably maintained at those positions.

  The operation of withdrawing / withdrawing the engagement pin 90 includes command information from the open switch 52 or the close switch 53, detection information from the open / close position detection means 49, and an exit / retreat detection means 99 for detecting the exit / retreat position of the engagement pin 90. The control device 50 controls the operation of the pin exit / retreat electric motor 92 on the basis of the detection information from.

  The exit / exit detection means 99 is composed of a rotary potentiometer that detects the engagement pin 90 reaching the preset protrusion limit position and retraction limit position via the linkage link 100 or the like. The protrusion limit position is a position where the engagement pin 90 is securely engaged with the first recess 45a or the second recess 45b of the bracket 45, and the retraction limit position is the first recess 45a of the bracket 45 or the retraction limit position. This is the position where the engagement with the second recess 45b is reliably released.

  The control operation of the control device 50 will be described. The microcomputer provided in the control device 50 repeatedly executes the control program periodically (for example, every 10 [μs]), so that the open switch 52 and the close switch 53 at each execution timing. In addition, calculation is performed according to the control program based on input information of various detection means such as the open / close position detection means 49, and a control signal for each control target such as a motor or an electromagnetic control valve is output as a calculation result. ing.

  Specifically, the control device 50 releases the fixing means 58 from the fixed state while the opening / closing drive means 51 is operated to the closing operation side of the upper case 12 while the opening operation command is instructed from the opening switch 52. Then, the first electric motor 68, the second electric motor 70, the opening / closing drive means 51, the upper case 12 is opened (ascending drive) and positioned at the second maintenance position or the first maintenance position. In addition, the operation of the pin exit / retraction electric motor 92 is controlled.

  The control device 50 advances a series of control operations for the opening operation of the upper case 12 while the opening operation command of the upper case 12 is instructed from the opening switch 52. When the opening operation command is interrupted, the control device 50 The control operation for the opening operation of the case 12 is stopped. Even when the opening operation command is continuously issued, when the upper case 12 reaches the second maintenance position and the engagement pin 90 of the fall prevention mechanism 89 reaches the protrusion limit position, the boarding operation unit is provided. The first notification lamp 93 is turned on to notify the driver that the upper case 12 has reached the second maintenance position, and the control operation for the opening operation of the upper case 12 is temporarily stopped.

  Thereafter, when the opening operation command is interrupted and an opening operation command is issued again, the control operation for the opening operation of the upper case 12 is resumed, the upper case 12 reaches the first maintenance position, and the fall prevention mechanism 89 is restarted. When the engagement pin 90 reaches the protrusion limit position, the first notification lamp 93 is turned off, and the second notification lamp 94 provided in the boarding operation unit is turned on, so that the upper case 12 is moved to the first maintenance position. The arrival is notified to the driver, and the control operation for the opening operation of the upper case 12 is stopped.

  Further, when a closing operation command for the upper case 12 is instructed from the closing switch 53, the control device 50 advances a control operation for the closing operation of the upper case 12 while the closing operation command is instructed, and When the closing operation command is interrupted, the control operation for the closing operation of the upper case 12 is stopped at that time.

  As described above, when the upper case 12 is opened, the upper case 12 is temporarily stopped at the second maintenance position by the control operation of the control device 50 based on the opening operation command from the opening switch 52. become. As a result, there is a possibility of incurring when a dedicated switch for instructing the opening operation of the upper case 12 to the first maintenance position and a dedicated switch for instructing the opening operation to the second maintenance position are provided. The upper case 12 is opened all at once from the working position to the first maintenance position due to an erroneous operation of the switch when trying to deal with the cereal clogging in the threshing path 19 generated in the threshing path 19, and the nipping and conveying mechanism 22 performs the nipping and conveying. The inconvenience that the harvested cereals that had been slid down to the outside of the vehicle body while changing the posture to the outer downward inclined posture with the feed chain 20 as a fulcrum with the weight of the stock side as the fulcrum and the tip side greatly raised It can be avoided in advance.

  In addition, since the opening switch 52 and the closing switch 53 are provided in the boarding operation unit, for example, when performing maintenance on the threshing device 4, the engine 9 is started to enable the upper case 12 to be lifted by hydraulic pressure. Operation, switching of the fixing means 58 from the fixed state to the released state, switching of the connecting means 84 from the connected state to the released state, and raising of the upper case 12 from the working position to the first maintenance position or the second maintenance position The operation and the stop operation of the engine 9 after the opening operation can be performed by a series of operations while in the boarding operation section. Further, when the maintenance on the threshing device 4 is finished, the engine 9 is started to operate to lower the upper case 12 by hydraulic pressure, and the upper case 12 is operated from the first maintenance position or the second maintenance position. A lowering operation to the position, a switching of the fixing means 58 from the released state to the fixed state, a switching of the connecting means 84 from the released state to the connected state, and a stop operation of the engine 9 after fixing at the working position. It can be performed by a series of operations while in the boarding operation section.

  As a result, the operability when the upper case 12 is opened and closed can be improved, and the receiving net 16 and the handling cylinder 18 can be cleaned or the receiving net 16 can be replaced, or the clogged cereal grains can be removed from the threshing path 19. Thus, it is possible to improve workability when performing maintenance on the threshing device 4 such as placing it on the conveyance start end of the feed chain 20.

  As shown in FIG. 12, the control device 50 determines the engagement state of the threshing clutch based on detection information from the threshing clutch lever sensor 95 (an example of a threshing clutch sensor) that detects the operation position for clutch connection of the threshing clutch lever. If detected, the first electric motor 68 and the second electric motor 70 of the fixing means 58 and the opening / closing driving means 51 are not operated even when an opening operation is instructed by the opening switch 52 of the instruction means 48, and the boarding is performed. The third notification lamp 96 provided in the driving unit is turned on to notify the driver that the threshing clutch is in the engaged state.

  Accordingly, when the upper case 12 is opened to the first maintenance position or the second maintenance position, it is necessary to switch the threshing clutch to the disengaged state. As a result, the upper case 12 is moved to the first maintenance position or When performing the opening operation to the second maintenance position and performing maintenance on the threshing device 4, when the opening operation of the upper case 12 is performed from the configuration of the opening / closing drive means 51 including the hydraulic pump 57 driven by the engine 9. Even if it is necessary to operate the engine 9 at the same time, or if you forget to stop the engine 9 after the opening operation, the cylinder 18 and the feed chain 20 are stopped from the stage before the upper case 12 is opened. The operation stop state of the threshing device 4 will appear, and the maintenance for the threshing device 4 is stopped. It will allow in.

  The threshing clutch lever sensor 95 is configured by a limit switch that is pressed by an operation to the cutting position of the threshing clutch lever.

  Further, the control device 50 sets the discharge cylinder 8A in advance based on detection information from the discharge position detection means 97 that detects the operation position of the discharge cylinder 8A of the unloader 8 that discharges the grain processed by the threshing device 4. When it is detected that the upper case 12 is not in the retracted position for opening the upper case, the discharge cylinder 8A is positioned at a position where it interferes with the discharge cylinder 8A of the unloader 8 when the upper case 12 is opened. As a result, even if an opening operation command is commanded by the opening switch 52 of the command means 48, the first electric motor 68, the second electric motor 70, and the opening / closing drive means 51 are not operated, and the fourth notification provided in the boarding operation section is provided. The lamp 98 is turned on to notify the driver that the discharge cylinder 8A is not operated to the retracted position.

  Thereby, when the upper case 12 is opened to the first maintenance position or the second maintenance position, it is possible to avoid the possibility that the upper case 12 and the discharge cylinder 8A come into contact with each other and are damaged.

  The discharge position detection means 97 is a swivel position detection means S1 using a rotary potentiometer that detects the turning angle of the discharge cylinder 8A, and a lift using a direct-acting potentiometer that detects the up-and-down swing angle of the discharge cylinder 8A. It is comprised from position detection means S2.

  Furthermore, the control device 50 is configured not to operate the threshing clutch switching motor 102 that switches the operating state of the threshing clutch when the fixing unit 58 is not in the fixed state based on the detection information of the operation detecting unit 72. Yes.

  As a result, the opening operation command is instructed by the opening switch 52 of the command means 48 and the fixing means 58 is not in the fixed state. Then, the maintenance work is finished, and the closing operation command is issued by the closing switch 53 of the command means 48. Until the upper case 12 is commanded and the fixing means 58 is switched to the fixed state, the operation of the threshing device 4 with the handling cylinder 18 stopped is maintained, so that it is handled during the maintenance work. It is possible to prevent the cylinder 18 from starting its operation and making it difficult to perform maintenance work, and it is possible to maintain an appropriate work state for performing the maintenance work.

  Hereinafter, a control program processed by the microcomputer of the control device 50 at each execution timing in order to realize the control operation for the opening / closing operation of the upper case 12 as described above will be described with reference to the flowcharts of FIGS.

  First, the main routine executed by the control device 50 will be described based on the flowchart of FIG. The control device 50 executes many processes other than the process illustrated in the flowchart of FIG. 19, but is not illustrated for the sake of simplicity of explanation.

  By the way, as a process not shown in the figure, for example, an abnormal operation of the fixing means 58 or the fall prevention mechanism 89 is detected, and a sound notification means such as a buzzer or a speaker, or a display notification means such as a liquid crystal display panel or a notification lamp is operated. Alarm processing, the working position of the upper case 12, the setting positions of the first maintenance position and the second maintenance position, the setting positions of the fixing mechanisms 59 and 60 in the fixing state and the releasing state of the fixing means 58, and the fall prevention mechanism 89 There is a self-diagnosis process for determining whether or not the setting positions of the protrusion limit position and the retraction limit position of the engagement pin 90 are within the appropriate range, and outputting an alarm if the position is outside the appropriate range.

  The control device 50 determines whether or not the open switch 52 of the command means 48 is on in step # M1, and if so, proceeds to step # M11. Therefore, while the opening switch 52 is pressed and an opening operation command is instructed, processing at step # M11 and subsequent steps is executed at each execution timing.

  In step # M11, it is determined whether or not the threshing clutch lever sensor 95 is turned on. If the threshing clutch is turned on, it is determined that the threshing clutch is in the engaged state, and the opening operation output of the upper case 12 is not performed, and the process proceeds to step # M12. Then, the lighting output of the third notification lamp 96 is performed.

  In step # M13, it is determined whether or not the unloader 8 is located at the retracted position based on the detection information of the discharge position detecting means 97 (the turning position detecting means S1 and the lift position detecting means S2). If the unloader 8 is not located at the retracted position, it is assumed that contact is expected during the opening operation of the upper case 12, and the opening operation output of the upper case 12 is not performed. Turns on the output.

  In step # M15, an opening operation process is executed. As will be described in detail later, in the opening operation process, depending on the execution timing, the first electric motor 68 and the second electric motor 70, the electromagnetic control valve 56 of the opening / closing drive means 51, and the pin of the fall prevention mechanism 89 for exiting and retracting the pin Necessary control output is performed on the electric motor 92. Note that the opening operation process of step # M15 is executed based on the discrimination result between step # M1, step # M11, and step # M12, so that the opening operation command is instructed by the opening switch 52. This is executed when the threshing clutch is disengaged and the unloader 8 is in the retracted position.

  When determining that the open switch 52 is OFF in step # M1, the control device 50 resets the target value in the opening operation process in step # M16. As will be described in detail later, this target value is set in a target value setting process executed in the opening operation process, and specifically, based on the opening / closing position of the upper case 12 at the execution timing. Either the 2 maintenance position or the first maintenance position is set. In the opening operation process, the opening operation is performed so that the opening / closing position of the upper case 12 becomes a position corresponding to the target value.

  Since the process of step # M16 is executed when the open switch 52 is off, it is not executed while the open switch 52 is on. Therefore, once the opening switch 52 is pressed to the operating position and an opening operation command is started, until the opening operation of the opening switch 52 is released to return to the non-operating position, that is, the opening operation command is The target value set in the target value setting process is maintained until it stops.

  Thereby, even if the pressing operation of the opening switch 52 is continued and the opening operation command is continuously commanded after the upper case 12 is positioned at the second maintenance position by the opening operation command, the upper case 12 is not connected to the hydraulic cylinder 55. Thus, the position is held in the second maintenance position corresponding to the target value, and then the target value is reset when the pressing operation of the open switch 52 is released.

  After that, when the opening operation command is issued again, the target value setting process in the opening operation process is executed, and the target value corresponding to the opening / closing position of the upper case 12 at the execution timing corresponds to the first maintenance position. Will be set.

  In step # M2, the control device 50 determines whether or not the closing switch 53 of the command means 48 is on. If it is on, the control device 50 proceeds to step # M21. Accordingly, while the close switch 53 is pressed and a close operation command is issued, the close operation process of step # M21 is executed at each execution timing.

  The control device 50 determines whether or not the threshing clutch lever sensor 95 is turned on in step # M3. If it is turned on, the control device 50 proceeds to step # M31. In step # M31, it is determined whether or not the fixing means 58 is in the fixed state based on the detection information of the operation detecting means 72 (the first position sensor 73 and the second position sensor 74). 4 should be maintained in the stopped state, the control output for the switching operation to the engaged state of the threshing clutch is not performed, the process proceeds to step # M32, and the fifth notification lamp is turned on in step # M32.

  If the fixing means 58 is in a fixed state, in order to switch the threshing device 4 to the operating state, the process proceeds to step # M32 and a clutch connection process is executed. In the clutch connection processing, the clutch is engaged up to a preset clutch connection operation position based on detection information of the clutch engagement / disconnection state detecting means for detecting the operation position of the clutch engagement / disconnection actuator operated by the threshing clutch switching motor 102. Thereafter, the operation of the threshing clutch switching motor 102 is controlled so as to maintain the operation position for clutch connection.

  Although not shown in the flowchart of FIG. 19, when the threshing clutch lever sensor 95 is not detected to be turned on (when the threshing clutch lever is located at the cutting position, or separated from the entering position and located on the cutting position side). ), Based on the detection information of the clutch disengagement state detecting means, the threshing clutch for threshing clutch discontinuation is operated to a predetermined operation position for clutch disengagement and then maintained at the operation position for clutch disengagement. A clutch disengagement process for controlling the operation of the switching motor 102 is executed.

  Thereby, when the threshing clutch lever is turned on, the threshing device 4 is switched from the stopped state to the operating state only when the fixing means 38 is in the fixed state, and when the fixing means 38 is not in the fixed state, the threshing device 4 is maintained in a stopped state, and the fifth notification lamp is lit.

  Next, the opening operation process will be described based on the flowchart of FIG.

  In step # F1, it is determined whether or not a target value for the opening operation of the upper case 12 is set. Specifically, a value corresponding to the first work position or the second work position is set in the storage means provided in the control device 50 with reference to the value of a variable changed and set in a target value setting process described later. If it is, it is determined that the target value is set. If the target value for the opening operation is not set, the process proceeds to step # F11, where the target value setting process is executed to set the target value for the opening operation.

  In the target value setting process, if the opening / closing position of the upper case 12 at the execution timing is lower than the second maintenance position based on the detection information of the opening / closing position detecting means 49, that is, the upper case 12 is operated from the second maintenance position. When it is on the position side (for example, when it is in the work position (fully closed position) or in the middle position between the work position and the second maintenance position), a value corresponding to the second maintenance position as the target value of the opening operation Is set, and the opening / closing position of the upper case 12 at the execution timing is not lower than the second maintenance position, that is, the upper case 12 is closer to the first maintenance position than the second maintenance position (for example, the second maintenance position). At the intermediate position between the second maintenance position and the first maintenance position (fully opened position). If) is the value corresponding to the first maintenance position as a target value of the opening operation is set (see FIG. 22).

  In step # F2, it is determined based on the detection information of the operation detecting means 72 whether or not the fixing means 58 is in the released state. If it is not in the release state, the processes of step # F21 and step # F22 are executed. In step # F21, a switching signal to the lowered position 56D is output to the electromagnetic control valve 56 of the opening / closing drive means 51. In step # F22, reverse drive is output to the first electric motor 68 and the second electric motor 70 of the fixing means 58. As a result, the reverse drive is output to the first electric motor 68 and the second electric motor 70 until the fixing means 58 reaches the release state.

  Thereby, the electromagnetic control valve 56 is maintained at the lowered position 56D and the upper case 12 is operated to the closing operation side until the fixing means 58 is released after the opening operation command is issued. This is a case where the upper case 12 is pushed up toward the second maintenance position due to clogging of the harvested cereals in the threshing path, and the fixing at the work position of the upper case 12 by the fixing means 58 is strong. In addition, when the upper case 12 is operated to the closing operation side by the opening / closing drive means 51, the harvested cereals packed in the threshing path are compressed and the upper case 12 is pulled down to the side away from the second maintenance position. Thus, the fixing by the fixing means 58 at the working position of the upper case 12 can be loosened.

  In step # F3, it is determined based on the detection information of the opening / closing position detecting means 49 whether the upper case 12 has been raised to the opening / closing position corresponding to the target value. If the opening / closing position of the upper case 12 has not reached the target value, the process of step # F31 is executed. In step # F31, a signal for switching to the raised position 56U is output to the electromagnetic control valve 56 of the opening / closing drive means 51.

  Thereby, when opening operation of the upper case 12 in the working position, if the opening operation command is continued, after the hydraulic cylinder 55 is extended and the upper case 12 is moved up to the second maintenance position, The upper case 12 can be temporarily stopped at the second maintenance position by stopping the expansion / contraction operation of the hydraulic cylinder 55, and the hydraulic cylinder 55 is extended when the upper case 12 at the second maintenance position is opened. After the upper case 12 is raised to the first maintenance position, the expansion and contraction operation of the hydraulic cylinder 55 can be stopped to stop the upper case 12 at the first maintenance position.

  In step # F4, it is determined based on the detection information of the exit / exit detection means 99 whether or not the engagement pin 90 of the fall prevention mechanism 89 is at the protrusion limit position. If the engagement pin 90 is not the protrusion limit position, the process of step # F41 is executed. In Step # F41, the forward rotation drive is output to the pin exit / retraction electric motor 92 of the fall prevention mechanism 89.

  Accordingly, the upper case 12 can be engaged with the second recess 45b (or the first recess 45a) of the front bracket 45 in a state where the upper case 12 is positioned at the second maintenance position (or the first maintenance position). The fall of the upper case 12 from the second maintenance position (or the first maintenance position) is prevented.

  In step # F5, it is determined based on the detection information of the opening / closing position detecting means 49 whether the opening / closing position of the upper case 12 is the first maintenance position or the second maintenance position. If it is the second maintenance position, the first notification lamp 93 is switched on in step # F51, and if it is the first maintenance position, the first notification lamp 93 is switched off in step # F52. 94 is switched to the lighting state.

  Thus, when the opening operation to the second maintenance position is completed, the first notification lamp 93 is turned on, and when the opening operation to the first maintenance position is completed, the second notification lamp 94 is replaced with the first notification lamp 93. Since it lights up, the operator can recognize the completion of the opening operation of the upper case 12 while staying in the control section.

  Next, the closing operation process will be described based on the flowchart of FIG.

  In step # R1, it is determined based on the detection information of the exit / exit detection means 99 whether the engagement pin 90 of the fall prevention mechanism 89 is at the retreat limit position. If it is not the retirement limit position, the process of step # R11 is executed. In step # R11, a reverse drive is output to the pin exit / retreat electric motor 92.

  As a result, the engagement pin 90 of the fall prevention mechanism 89 is retracted to the retraction limit position, and the upper case 12 is allowed to descend.

  In step # R2, whether or not the upper case 12 has been raised to the work position is determined based on the detection information of the open / close position detection means 49. If the opening / closing position of the upper case 12 has not reached the work position, the process of step # R21 is executed. In step # R21, a signal for switching to the lowered position 56D is output to the electromagnetic control valve 56 of the opening / closing drive means 51.

  Accordingly, when the upper case 12 at the second maintenance position (or the first maintenance position) is closed, if the closing operation command is continued, the hydraulic cylinder 55 is continuously contracted to operate the upper case 12. After lowering to the working position, the upper case 12 can be stopped.

  In step # R3, it is determined based on the detection information of the operation detection means 72 whether or not the fixing means 58 is in a fixed state. If not fixed, the process of step # R31 is executed. In step # R31, forward rotation drive is output to the first electric motor 68 and the second electric motor 70 of the fixing means 58. Thereby, the forward rotation drive is output to the first electric motor 68 and the second electric motor 70 until the fixing means 58 reaches the fixed state.

  In step # R4, the first notification lamp (or the second notification lamp) is switched to the extinguished state. Thereby, when the upper case 12 positioned at the second maintenance position is closed, the first notification lamp is turned off. When the upper case 12 positioned at the first maintenance position is closed, the second notification lamp is turned off. Turns off.

[Other Embodiments] Other embodiments are listed below.

(1) The upper case 12 may be configured to be opened and closed by sliding up and down with respect to the lower case 11.

(2) A resin net or a crimp net may be employed as the receiving net 16.

(3) As the handling cylinder 18, one constituted by a single processing cylinder may be adopted, or one having spiral teeth may be adopted.

(4) As the command means 48, each time the pressing operation is performed by a single push button switch, the fixing means 58 is switched from the fixed state to the released state, and the work position of the upper case 12 is changed to the second maintenance position. Lifting operation, lifting operation of the upper case 12 from the second maintenance position to the first maintenance position, lowering operation of the upper case 12 from the first maintenance to the working position, and switching of the fixing means 58 from the released state to the fixed state The operation may be configured to be commanded in that order.

(5) The command means 48 is moved upward from the work position of the upper case 12 to the second maintenance position and moved from the second maintenance position to the first maintenance position for each pressing operation by a single push button switch. The operation and the lowering operation from the first maintenance to the work position may be commanded in that order. Alternatively, the upper case 12 may be provided with three dedicated switches for commanding operations to the work position, the first maintenance position, or the second maintenance position. Further, it may be constituted by a three-position switching type changeover switch for instructing an operation to the work position of the upper case 12, the first maintenance position, or the second maintenance position according to the operation position.

(6) As control means, a control device for opening / closing control for controlling the operation of the opening / closing drive means 51 and a control device for switching control for controlling the operation of the switching drive means 68, 70 may be provided. Good. In this case, when the control device for switching control is configured to perform control in cooperation with the control device for switching control, the fixing device is switched from the fixed state to the release state by the control device for switching control. Then, a closing operation request is transmitted from the control device for switching control to the control device for opening / closing control, and the opening / closing drive means 51 is operated to the closing operation side of the upper case 12 by the control device for opening / closing control. State.

(7) The control means may be configured to detect arrival of the work position of the upper case 12, the first maintenance position, and the second maintenance position from the operation time of the opening / closing drive means 51. .

(8) The control means is configured to perform the opening operation of the upper case 12 after performing the switching operation from the on state to the off state of the threshing clutch based on the opening operation command from the command means 48. It may be.

(9) The opening / closing drive means 51 may be configured to open and close the upper case 12 by operating a single-acting hydraulic cylinder, hydraulic motor, electric cylinder, or electric motor.

(10) The hydraulic pump 57 may be configured to be driven by a dedicated driving device such as an electric motor.

(11) The fixing means 58 may be configured by only the front-side fixing mechanism 59 or the rear-side fixing mechanism 60.

(12) As the fixing means 58, the first hook 62 in the front-side fixing mechanism 59 is mounted on the front wall 12A of the upper case 12, and the first pin 64 is protruded from the front wall 11A of the lower case 11. It may be. Alternatively, the second pin 65 in the rear fixing mechanism 60 may be provided on the rear wall 12B of the upper case 12 and the second hook 67 may be provided on the auxiliary wall 11B of the lower case 11.

(13) As the fixing means 58, from one of the lower case 11 and the upper case 12, an insertion pin equipped to be able to move out and out, and an insertion hole formed in the other of the lower case 11 and the upper case 12, The upper case 12 is prevented from being opened from the working position by inserting the insertion pin into the insertion hole, and the upper case 12 is allowed to be opened from the working position by releasing the insertion of the insertion pin into the insertion hole. It may be a thing.

(14) An electric cylinder or the like may be adopted as the switching drive means 68, 70. The switching drive means 68, 70 may be a hydraulic actuator such as a hydraulic cylinder or a hydraulic motor, or hydraulic oil for the hydraulic actuator. You may comprise in the hydraulic type provided with the switching valve etc. which switch the flow of these.

(15) A single switching drive means 68 (or switching drive means 70) may be configured to switch the front and rear fixing mechanisms 59, 60 in the fixing means 58 between a fixed state and a released state.

(16) The threshing clutch sensor may be composed of a rotary potentiometer that detects the operation position of the threshing clutch lever, or is configured to directly detect the operating state of the threshing clutch. May be.

(17) The turning position detecting means and the raising / lowering position detecting means do not have to be configured with a potentiometer. For example, specific configurations of the turning position detecting means and the raising / lowering position detecting means such as a rotary encoder. Can be appropriately changed.

Overall side view of self-removing combine Overall plan view of self-removing combine Longitudinal side view of threshing device Cross-sectional plan view of threshing section Front view of the threshing device showing a state where the upper case is fixed to the working position by the fixing means. Front view of the threshing device showing a state in which the fixing of the upper case at the working position by the fixing means is released Longitudinal rear view of the threshing device showing a state where the upper case is fixed to the working position by the fixing means. Longitudinal rear view of the threshing device showing a state in which the fixing of the upper case at the working position by the fixing means is released Longitudinal front view of the threshing device showing the state where the upper case is located at the working position Longitudinal front view of the threshing apparatus showing a state where the upper case is located at the second maintenance position Longitudinal front view of the threshing apparatus showing a state where the upper case is located at the first maintenance position Block diagram showing the control configuration for opening and closing the upper case Longitudinal front view of the main part showing the state of the open / close detection means and the fall prevention mechanism at the work position of the upper case Longitudinal front view of the main part showing the state of the open / close detection means and the fall prevention mechanism at the second maintenance position of the upper case Longitudinal front view of the main part showing the state of the open / close detection means and the fall prevention mechanism at the first maintenance position of the upper case Longitudinal side view of main part showing configuration and operation structure of connecting means A longitudinal rear view of the main part showing the connected state and the disconnected state of the connecting means Vertical side view of the main part showing the configuration of the fall prevention mechanism Flow chart of main routine of control program executed by control device Flow chart of opening operation process Flow chart of closing operation process Flow chart of target value setting processing

Explanation of symbols

DESCRIPTION OF SYMBOLS 8 Unloader 11 Lower case 12 Upper case 16 Receiving net 18 Handling cylinder 48 Opening / closing command means 50 Control means 51 Opening / closing drive means 58 Fixing means 68 Switching drive means 70 Switching drive means 72 Fixed state detecting means 95 Threshing clutch sensor 102 Clutch switching means S1 Turning position detection means S2 Lift position detection means

Claims (4)

An upper case provided with a handling cylinder is connected to a lower case provided with a receiving net so that the handling cylinder can be opened and closed between a working position where the handling cylinder is close to the receiving net and a maintenance position where the handling cylinder is separated from the receiving net. And
Fixing means configured to be switchable between a fixed state for preventing the opening operation of the upper case from the working position and a release state for allowing the opening operation;
Open / close drive means for opening / closing the upper case;
Control means for controlling the operation of the opening / closing drive means;
An opening / closing operation device for a threshing device provided with an opening / closing command means for instructing the control means to open and close the upper case,
Switching drive means for switching the fixing means is provided,
When an opening operation is commanded by the opening / closing command means, the control means switches the fixing means from the fixed state to the release state in a state where the opening / closing driving means is operated to the closing operation side of the upper case. Next, an opening / closing operation device for a threshing device configured to control the operation of the switching drive means and the opening / closing drive means to open the upper case. A threshing clutch sensor for detecting an operating state of a threshing clutch that intermittently transmits power to the handling cylinder is provided,
When the control means is based on the detection information of the threshing clutch sensor and the threshing clutch is in an engaged state, the switching drive means and the opening / closing drive means even if an opening operation is commanded by the opening / closing command means The opening / closing operation apparatus of the threshing apparatus of Claim 1 comprised so that it may not operate | move. A fixed state detecting means for detecting that the fixing means is in a fixed state;
The said control means is comprised so that the clutch switching means which switches the operating state of the said threshing clutch may not be operated when the said fixing means is not a fixed state based on the detection information of the said fixed state detection means. The opening / closing operation apparatus of the threshing apparatus of 2. An unloader that discharges the grain processed by the threshing device is provided so as to be capable of swiveling and lifting up and down in the upper space of the threshing device,
A turning position detecting means for detecting a turning position of the unloader and a raising / lowering position detecting means for detecting a raising / lowering position;
When the control means determines that the unloader is located at a position where it interferes with the unloader when the upper case is opened based on detection information of the turning position detection means and the lift position detection means. The opening / closing operation device for a threshing apparatus according to any one of claims 1 to 3, wherein the switching drive means and the opening / closing drive means are not operated even when an opening operation is commanded by the opening / closing command means. Combines equipped with.

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