JP2013201993A - Switching operation structure for threshing chamber of thresher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple and inexpensive switching operation structure of a threshing chamber of thresher capable of performing a maintenance work while preventing wrong operations by an operation of a fixing release lever of a lock member.SOLUTION: There is provided a threshing chamber switching operation structure comprising a threshing chamber case 3 supported as rotatable in the vertical direction using a fulcrum shaft 33 as a center of rotation, in setting the threshing chamber case 3 in threshing attitude by downward turning the threshing chamber case 3, disengageably fixing the threshing chamber case 3 to thresher lower machine casing 1a through a fixing mechanism 5, and releasing the fixing mechanism 5 with a releasing operation of a fixing releasing lever 3L in switching attitude from threshing attitude to maintenance attitude by upward turning of the threshing chamber case 3, the threshing chamber case 3 engages to a support locking mechanism 5b as capable of fixing in maintenance attitude, wherein in fixing the threshing chamber case 3 in maintenance attitude the fixing of the support locking mechanism 5b is set as freely releasable by an operation of the fixing releasing lever 3L.

Description

  The present invention relates to a handling room opening / closing operation structure of a threshing machine.

Conventionally, a handling case that pivotally supports the barrel between the inlet side plate and the outlet side plate is detachably fixed to the lower threshing machine frame via a lock mechanism, and the fulcrum shaft on the rear side of the machine body is rotated. When the handling chamber case is pivoted upward to the maintenance work posture when the lock member of the lock mechanism is unlocked by operating the unlocking lever and the handling chamber case is turned upward to the maintenance work posture. A threshing machine opening / closing operation structure of a threshing machine configured to be fixed in a maintenance work posture by engagement with a handling chamber case support member of a support lock mechanism is already known (see, for example, Patent Document 1).
The handling chamber opening / closing operation structure has a configuration in which the fixing release lever of the lock member and the fixing release lever of the handling chamber case support member are juxtaposed toward the outside of the machine body on the threshing machine front side (feed chain side). ing.

JP 2009-60835 A

  The handling chamber opening / closing operation structure shown in Patent Document 1 has a threshing machine with two types of fixation release levers protruding from the rear (exit side plate side), so that the handling chamber case in the maintenance work posture is rotated downward. In doing so, there are disadvantages such as erroneous selection of the two levers and erroneous operation, and attention must be paid to the selection operation of the two unlocking levers, resulting in inefficiencies in maintenance work. Further, since a dedicated lever structure for unlocking the handling chamber case support member is required, the number of parts is increased, the handling chamber opening / closing operation structure is complicated, and there is a problem that the cost is increased.

The present invention for solving the above-mentioned problems is as follows. First, the handling chamber case 3 for pivotally supporting the handling cylinder 12 between the inlet side plate 31 and the outlet side plate 32 is provided, and the fulcrum shaft 33 on the rear side of the machine body is provided. While being supported as a pivot point so as to be pivotable up and down, the handling case 3 is pivoted downward to be in a threshing work posture, and is fixed to the threshing lower machine frame 1a via the lock mechanism 5 so as to be detachable. When the lock mechanism 5 is unlocked by operating the lock release lever 3L and the handling chamber case 3 is rotated upward from the threshing work posture to the maintenance work posture, the handling chamber case 3 is engaged with the support lock mechanism 5b. In the threshing machine opening and closing operation structure that can be fixed to the maintenance work posture,
When the handling case 3 is fixed in the maintenance work posture, the fixing of the support lock mechanism 5b can be released by operating the fixing release lever 3L.
Second, the handling chamber case 3 that pivotally supports the handling cylinder 12 between the inlet side plate 31 and the outlet side plate 32 is supported so as to be pivotable up and down with a fulcrum shaft 33 on the back side of the machine body as a pivotal fulcrum. In a state where the handling case 3 is rotated downward to be in the threshing work posture, it is fixed to the threshing lower machine casing 1a via the lock mechanism 5 so that it can be engaged and disengaged, and the lock member 51 of the lock mechanism 5 is unlocked. When the lever 3L is unlocked and the chamber case 3 is rotated upward from the threshing posture to the maintenance posture, the chamber case 3 is engaged with the chamber case support member 57 of the support lock mechanism 5b. In the threshing machine opening and closing operation structure that can be fixed to the maintenance work posture,
A handling chamber case support member 57 that fixes the handling chamber case 3 in the maintenance work posture is linked to the fixing release lever 3L that releases the lock member 51, and the handling chamber case support is supported based on the operation of the fixing release lever 3L. The fixed posture of the member 57 is configured to be freely releasable.
Thirdly, the fixed release lever 3L or the connecting member 52 that connects the fixed release lever 3L and the lock member 51 is connected to the support switching rod 58 that switches the handling chamber case support member 57 in the fixed posture to the fixed release posture. By connecting the connecting members 59 to each other, the handling case support member 57 in the fixed posture is switched to the fixed releasing posture via the connecting member 59 and the support switching rod 58 based on the operation of the fixing release lever 3L. It is characterized by the construction.
Fourth, the lock member 51 is provided with a support switching member 70 that engages with the chamber case support member 57 that fixes the chamber case 3 in the maintenance work posture, and the chamber case support is based on the operation of the fixing release lever 3L. The member 57 and the support switching member 70 are configured to be freely disengaged.

According to the first aspect of the present invention, when the handling chamber case is fixed in the maintenance work posture, the fixing of the support lock mechanism is configured to be released by operating the fixing release lever. Because the lock member can be unlocked and the handling case support member can be unlocked by operation, when the handling case is turned up and down, it is not necessary to select a plurality of levers as in the prior art. By operating only a single lever, maintenance work that prevents erroneous operation can be performed efficiently, and an inexpensive handling and opening / closing operation structure with a small number of parts can be achieved.
According to the invention of claim 2, the handling chamber case support member that fixes the handling case to the maintenance work posture is linked to the fixing release lever that releases the locking member, and the handling is performed based on the operation of the fixing release lever. Since the fixed posture of the chamber case support member is configured to be freely releasable, the lock member is unlocked and the chamber case support member is unlocked by operating a single unlock lever without selecting a plurality of levers. Therefore, it is possible to efficiently perform maintenance work that prevents erroneous operation, and it is possible to provide an inexpensive handling room opening / closing operation structure with a small number of parts.
According to the third aspect of the present invention, the fixed release lever or the connecting member that connects the fixed release lever and the lock member is connected to the support switching rod that switches the handling chamber case support member in the fixed posture to the fixed release posture. By connecting the connecting members, the handling case support member in the fixed posture is switched to the fixed releasing posture via the connecting member and the support switching rod based on the operation of the fixing release lever. By operating only one lock release lever, the lock member can be fixed and the chamber case support member can be fixed easily, and the chamber opening / closing operation structure can be easily configured.
According to the invention of claim 4, the lock member is provided with the support switching member that engages with the chamber case support member that fixes the chamber case in the maintenance work posture, and the chamber case support is provided based on the operation of the fixing release lever. Since the engagement between the member and the support switching member is configured to be freely disengaged, the handling chamber case supporting member can be unlocked by a simple and inexpensive configuration by operating only a single unlocking lever.

It is a perspective view of the threshing machine provided with the handling room opening / closing operation structure concerning 1st Embodiment of this invention. It is a side view by the side of the entrance side board of FIG. It is a side view by the side of the exit side board of FIG. It is a top view which shows a partially broken structure of the chamber case and the waste transporting device. The structure and effect | action of a fixing mechanism are shown, (A) is a side view which shows the releasing attitude | position of a fixing nail | claw. (B) is a side view which shows the acceptance attitude | position of the fixed nail | claw of the same figure (A). (C) is a side view showing a fixed posture of the fixed claw. It is a top view of the principal part which shows the connection structure of a locking mechanism and a fixing mechanism. It is a side view which shows the structure of the handling chamber opening / closing operation structure concerning 2nd Embodiment of this invention. It is a perspective view which shows the whole structure of a rocking | swiveling selection mechanism. It is a perspective view which shows the stroll back part of a rocking | swiveling selection mechanism. It is a rear view which shows another embodiment of a Strollac part.

  An embodiment of the present invention will be described with reference to the drawings. 1 to 4 and 7 is a threshing machine 1 mounted on a traveling machine body such as a combine, and is installed behind a cutting part (not shown) provided in front of the machine body to feed the harvested cereal meal into the feed chain 10. The threshing is supplied to the inside of the handling chamber 11 through the handling cylinder 12 and threshed by the handling cylinder 12, and the threshing is sorted by the swing sorting mechanism 14 installed below the receiving net 13. The selected grain is stored in a glen tank 15 installed on the machine side, and foreign matters (sawdust) are discharged from the dust outlet 16 to the rear rear side of the machine. From the end of the machine, it is transferred to the waste transporting device 2 and discharged out of the machine. The swing selection mechanism 14 is configured as shown in FIGS.

  This threshing machine 1 is an outer side with respect to the threshing lower machine casing 1a of the threshing machine body, with the handling chamber case 3 and the waste transporting device 2 serving as the threshing upper machine frame both inside (back side of the handling chamber 11) as fulcrums (Feed chain 10 side) can be opened greatly. As a result, the threshing machine 1 can be switched from the normal threshing work posture (solid line state) to the maintenance work posture in which the lower part of the handling chamber 11 and the waste transporting device 2 is opened as shown in FIGS. In addition, maintenance work such as removal and cleaning of clogging in the handling chamber 11 and the grain haul conveyance route, and inspection and repair are performed.

  In the state where the waste chain 21 is wound around the transport frame 20 supported by the support structure shown in FIG. 4 to be described later, the waste transporting device 2 is behind the handling chamber 3 from the terminal end side of the feed chain 10. The waste is transported in a substantially horizontal posture while being attached and supported in an inwardly inclined shape toward the inside. The feed chain 10 provided on the threshing lower machine casing 1a side is provided with a holding rail 10a provided on the handling chamber case 3 side, and the rear top plate side of the threshing lower machine casing 1a is provided on the waste chain 21. The sandwiching rails 21a provided on the top are arranged so as to carry out the culm sandwiching and transporting in series.

  As shown in FIGS. 2 to 4, the handling chamber case 3 has an inlet side plate 31 and an outlet side plate 32 that pivotally support the handling cylinder 12 rotatably on the front and rear sides of the top plate 30. A handling chamber 11 is formed with the receiving net 13 stretched on the 1a side. The chamber case 3 is pivotally fitted with a pair of case arms 3M projecting from the front and rear of the case back side to a fulcrum shaft 33 that is laterally provided in the front and rear direction on the threshing lower machine frame 1a on the right side of the machine body. The back side (inside of the machine body) of the entrance side plate 31 and the exit side plate 32 is fixed to each case arm 3M. As a result, as shown by the dotted lines in FIGS. 2 and 3, the chamber case 3 is supported through the case arm 3 </ b> M so as to be rotatable up and down around the fulcrum shaft 33. Moreover, the fulcrum shaft 33 is attached to the back side front and rear part of the threshing lower machine casing 1a, extends from the back surface of the outlet side plate 32 to a position close to the rear waste transporting device 2, and the rear end part is a Glen tank. It connects with the support frame 17 extended from the 15 grain discharge cylinder 15a side, and is reinforced and supported.

  Next, the handling room opening / closing operation structure of the threshing machine which concerns on 1st Embodiment of this invention with reference to FIGS. 1-4 is explained in full detail. First, the handling chamber case 3 operates from the threshing work posture shown in FIG. 1 by operating the front and rear fixing release levers 3L provided on the front wall side (feed chain 10 side) of the handling chamber case 3 in the upward direction. The lock mechanism 5 a on the 31 side and the lock mechanism 5 on the outlet side plate 32 side are released and pivoted upward about the fulcrum shaft 33. Thereby, it is possible to switch to the maintenance work posture in which the lower part of the handling chamber 11 and the waste transporting device 2 is opened. Each of the locking mechanisms 5a, 5 is capable of rotating plate-like locking members 51a, 51, each having a hook portion 50, on a mounting shaft 32a projecting from the inlet side plate 31 and the outlet side plate 32 of the chamber case 3. And the other side is urged in the locking direction by a spring 53 in a state where the other side is connected to each of the fixing release levers 3L by a connecting rod (connecting member) 52. Thereby, the lock members 51a and 51 are engaged with the pin shaft-shaped fixed piece 54 projecting from the threshing lower machine casing 1a in a detachable manner.

  At this time, the lock mechanism 5 configured on the outlet side plate 32 side forms a long hole-like connecting portion 55 on the upper side (the connecting rod 52 side) of the lock member 51, and the connecting portion 55 and an operation rod described later. By connecting the connecting piece 61a protruding from 61 with a linkage 56, the lock release member 3L is connected to the lock release lever 3L so that the lock member 51 of the lock mechanism 5 and the lock pawl 60 of the lock mechanism 6 are simultaneously released. Yes. Thereby, the fixing release operation of the handling chamber case 3 and the waste transporting device 2 is performed simultaneously. The lock member 51 rotates about the attachment shaft 32a based on the upward operation of the fixation release lever 3L (release operation indicated by the arrow in FIG. 3), and when the engagement with the fixed piece 54 is released, The urging force is brought into contact with a stopper 32b projecting from the outlet side plate 32 to make it impossible to rotate more than a predetermined amount. The handling chamber case 3 is provided with a handle 3H protruding in the front-rear direction on the outer side of the machine body. The handling chamber case 3 is gripped to facilitate supporting the handling chamber case 3 in the vertical rotation direction.

  As a result, when the chamber case 3 and the waste transporting device 2 are lowered and rotated from the maintenance work posture and returned to the threshing work posture, the hook portion 50 automatically engages with the fixed piece 54 against the spring 53. To return. Further, above the lock mechanism 5 on the outlet side plate 32 side, a support lock mechanism 5b that temporarily holds the maintenance work posture of the chamber case 3 is installed. Further, a known gas damper mechanism is provided between the threshing lower machine casing 1a and the entrance side plate 31 and the exit side plate 32 to resist the weight of the handling case 3 and the waste transporting device 2 and to assist the upward rotation of both. An upward rotation urging mechanism 3 </ b> S composed of, for example, is interposed.

  Then, the support lock mechanism 5b of the handling chamber opening / closing operation structure shown in FIG. 3 includes a handling chamber case support member 57 that supports the handling chamber case 3 in the maintenance work posture, and the handling chamber case support member 57 is released from the fixed posture. It is configured by a support switching rod 58 or the like that switches to a posture. The handling chamber case support member 57 is pivotally supported by a mounting shaft 32c projecting from the threshing lower machine casing 1a at its midway portion, and a bowl-shaped stopper portion 57a is cut out on the outer side of the upper end. At the same time, the lower end is pulled inward by a spring 57b. The support switching rod 58 is pivotally supported by a mounting shaft 58a projecting from the case arm 3M on the outlet side plate 32 side. The support switching rod 58 is connected at its upper end to the other end of a release wire (linking member) 59 connected to the support release lever 57L side, and at its lower end, the chamber case support member 57 is switched from a fixed posture to a fixed release posture. Thus, the switching pin 58b to be brought into contact is projected forward.

  In the above-described configuration, the mounting shaft 58a of the support switching rod 58 is in a maintenance work posture with a guide member that is slidably in contact with the handling chamber case support member 57 biased by the spring 57b while restricting tilting of the handling chamber case support member 57 to the outside of the machine body. The chamber case 3 is provided at a position where it is used also as a stopper member that is engaged with and supported by the stopper portion 57a. In addition, the release wire 59 as a linking member connects the inner wire base portion to the middle portion of the connection rod 52a that connects the support release lever 57L and the coupling rod 52. As a result, when the support release lever 57L is operated to move upward in the direction of the arrow in FIG. 3, the release wire 59 is pulled together with the connecting rod 52 in the direction of the arrow to rotate the support switching rod 58 around the mounting shaft 32c, thereby switching the switching pin 58b. Thus, the handling chamber case support member 57 can be operated simultaneously in the support release direction. When the hand is released from the fixing release lever 3L, the handling chamber case support member 57 and the support switching rod 58 are returned to the original support standby posture by the urging force of the spring 57b.

  With this configuration, when the handling chamber case 3 is rotated upward by operating the fixing release lever 3L upward, the mounting shaft 58a slides in contact with the handling chamber case support member 57 while pushing the handling chamber case support member 57 around the fulcrum shaft 33. The mounting shaft 58a is engaged with the stopper portion 57a by tilting to the fixed posture shown by the dotted line in FIG. 3 around the shaft 32c. At this time, the handling chamber case 3 is held in the maintenance work posture in a state where its own weight is shared by the fulcrum shaft 33 and the handling chamber case support member 57. When switching from the maintenance work posture to the threshing work posture, if the fixing release lever 3L is operated downward, the support switching rod 58 in the fixed posture shown by the dotted line is pulled by the release wire 59 and rotates in the direction of the arrow. The switching pin 58b pushes the chamber support member 57 in the disengagement direction to disengage the attachment shaft 58a. In this state, when the operator releases his / her hand from the fixing release lever 3L and rotates the fulcrum shaft 33 around the fulcrum while supporting the handling chamber case 3 with the handle 3H, the lock member 51 is fixed at the lowest position. 54 automatically engages with the threshing posture. At the same time, the chamber case support member 57 and the support switching rod 58 of the support lock mechanism 5b can be set to the support standby posture shown by the solid line.

  Next, the waste transporting apparatus 2 will be described with reference to FIGS. In the threshing work posture, the scouring and transporting device 2 supports the start end of the transport frame 20 by the transport driving unit 2a on the outlet side plate 32 side, and the fixing support 22 provided at the terminal end of the transport frame 20 as an accommodation support mechanism 2b. The front side of the fixing rod 22 is supported and fixed to the fulcrum shaft 33 detachably by the fixing mechanism 6. Accordingly, when the lock mechanisms 5a and 5 and the fixing mechanism 6 are released by operating the front and rear fixing release levers 3L and 3L upward, the handling chamber case 3 and the waste transporting device 2 can be opened as they are. At this time, the evacuation transport device 2 is in a maintenance work posture in which the accommodation support mechanism 2b is used as the accommodation support fulcrum and the start end side is greatly opened upward, and at the time of closing to switch from the maintenance operation posture to the threshing operation posture, 3 and the waste transporting device 2 can be automatically locked (fixed) individually.

  Further, as shown in FIGS. 4 and 6, a mounting bracket 27 of a reinforcing connecting rod 26 that is connected to the outlet side plate 32 side and is reinforced can be rotated near the fixing mechanism 6 at the rear extension portion of the fulcrum shaft 33. The other end of the reinforcing connecting rod 26 attached to the mounting bracket 27 is fixedly attached to a mounting base 28 that supports the transport driving unit 2 a on the outlet side plate 32. On the lower surface of the mounting base 28, there is attached a rejecting gear case 28a pivotally connected to the starting end of the transport frame 20, and the rejecting gear case 28a transmits the rotational power on the side of the barrel 12 to the drive sprocket. When the evacuation chain 21 is driven and the connection and fixing mechanism 6 between the interchangeable support mechanism 2b and the support frame 17 is released, the terminal end side of the evacuation transport device 2 is independent with the transport drive unit 2a side as a rotation fulcrum. It is configured to be rotatable. Further, in the state where the fixing rod 22 of the waste transporting device 2 is supported by the interchangeable support mechanism 2b, the upward movement and backlash of the end portion thereof are prevented by fixing to the fulcrum shaft 33 side by the fixing mechanism 6. .

  Next, the fixing mechanism 6 will be described with reference to FIGS. The fixing mechanism 6 is provided with an operating rod 61 that pivots the fixing claw 60 in the releasing direction via the lock member 51 and the linkage 56 as a linkage member based on the operation of the rear-side fixation release lever 3L. It is pivotally supported by a plurality of support pieces 62, 62... Projecting from the shaft 33 side. The operation rod 61 of the illustrated example has an attachment piece 63 projecting from its end side, and a fixing claw 60 is attached and fixed to the attachment piece 63 so that the positioning can be adjusted. The fulcrum shaft 33 is provided with a U-shaped receiving seat 65 projecting at a position facing the fixed claw 60, and the fulcrum shaft 33 is supported by the urging force of a spring 66 interposed between the fixed claw 60 and the fulcrum shaft 33. In a state where the fixing rod 22 is placed in 65, the fixing rod 22 is configured to prevent rattling when the fixing rod 22 is clamped and fixed by the fixing claws 60.

  In addition, the fixing mechanism 6 causes the fixing claw 60 biased in the fixing direction by the spring 66 to the spring 66 when the squeezing / conveying device 2 is returned and rotated downward from the maintenance operation posture to the threshing operation posture. A guide lock mechanism 9 that receives the fixing rod 22 and guides it to the original fixed posture is provided. As shown in FIG. 5, the guide lock mechanism 9 includes a pin shaft-like operating portion 67 protruding from the side of the mounting bracket 27, and an operating rod 61 at a position facing the operating portion 67 so as to be engageable. It comprises a guide member 8 for maintaining the posture, which protrudes in the middle, and has a regulation surface 80 and a guide surface 81, which will be described later, formed in a bowl shape. As a result, the holding rod 22 that rotates downward from the upper maintenance work posture is held so as to be guided from the open posture (accepting posture) that can be received by the fixing claw 60 to the pinching fixed posture.

  That is, as shown in FIG. 5 (A), in the open posture (fixed release posture) of the fixed claw 60 in the state in which the waste transporting device 2 is in the maintenance work posture, in the same direction as the waste transporting device 2 is rotated. The actuating portion 67 of the rotating mounting bracket 27 abuts against the regulating surface 80 of the integral guide member 8 via the fixed pawl 60 and the operating rod 61 in the open posture, and resists the biasing force of the spring 66. The same posture is maintained. Therefore, even if the fixing release lever 3L is released in this state, the fixing claw 60 can maintain the above-mentioned posture stably, and the handling chamber case 3 and the waste transporting device 2 can be turned upward. it can.

  Then, when the waste transporting device 2 is turned back to the threshing work posture from the maintenance work posture, the operation is performed as shown in FIG. The part 67 is moved from the regulating surface 80 of the guide member 8 so as to abut and support (regulate holding) the lower guide surface 81. At this time, the fixed claw 60 is gradually rotated to the fixed side by the urging force of the spring 66, but since the fixed claw 60 is still in the open receiving posture at the initial stage, the fixed hook 22 is placed in the hook portion of the fixed claw 60. It is introduced smoothly.

  Next, when the waste transporting device 2 is further rotated downward, as shown in FIG. 3C, the operating portion 67 is in a position where the guide member 8 is not regulated and held, so that the fixed pawl 60 is biased by the spring 66. Therefore, the fixing rod 22 can be clamped and fixed with the receiving seat 65 formed on the extension portion of the fulcrum shaft 33 shown in FIG. In this way, the waste transporting apparatus 2 provided with the pivot fulcrum (installation position of the interchangeable support mechanism 2b) at a position deviated backward with respect to the pivot fulcrum of the handling chamber case 3 is handled by the lock mechanism 5. Even if the chamber case 3 is operated at a timing slightly delayed from the locking operation, the fixing claw 60 is operated independently of the locking mechanism 5 so that the fixing rod 22 is received and guided to the original fixing posture. The scissors 22 can be automatically clamped and fixed. Therefore, even if the lock operation of the handling chamber case 3 and the waste transporting device 2 has different timings, both can be stably and quickly fixed to the threshing work posture.

  When the threshing machine 1 configured as described above performs a threshing operation, the handling chamber case 3 and the waste transporting device 2 are held in a threshing operation posture, and the stocker side of the cereal basket is sandwiched and conveyed by the feed chain 10, 11, the tip side is threshed, and the threshed waste is transferred from the feed chain 10 to the waste conveying device 2 to be conveyed and discharged outside the machine. At the time of such threshing operation, when the candy entangles with the handling cylinder 12, clogs of swarf in the handling chamber 11, or waste clogging occurs in the waste conveying device 2, first, The lock release levers 3L and 3L are operated upward to release the front and rear lock mechanisms 5a and 5. As a result, the lock between the handling chamber case 3 and the threshing lower machine casing 1a is released, and the fixing mechanism 6 of the waste transporting device 2 connected to the locking mechanism 5 on the outlet side plate 32 side is released, and the handling chamber case 3 is moved upward. By the rotation operation, the waste transporting device 2 can be rotated upward via the fulcrum shaft 33 and the interchangeable support mechanism 2b.

  And when both are in the maintenance work posture rotated to the uppermost position, the handling chamber case support member 57 of the support lock mechanism 5b automatically engages and supports the mounting shaft 58a on the handling chamber case 3 side. Fixed and held in a largely open maintenance work position. Therefore, the operator can easily perform maintenance operations such as removal of swarf and clogging, cleaning, inspection and repair for the handling chamber 2 and the waste transporting device 2. When the maintenance operation is completed, first, the support release lever 57L is unlocked with the right hand while supporting the chamber case 3 side with the left hand, and the handle case 3 is rotated downward with the handle 3M in both hands. Move. As a result, the evacuation / conveying device 2 can be lowered to the normal evacuation / conveying position along with the downward rotation of the handling chamber case 3, and the handling chamber case 3 is fixed to the threshing lower machine casing 1a via the lock mechanisms 5 and 5a. In addition, the waste transporting device 2 can be fixed to the fulcrum shaft 33 side via the fixing mechanism 6, and the threshing operation can be performed again.

  The return of the handling room case 3 to the threshing work posture upon completion of such maintenance work is performed by the fixing release lever 3L for releasing the lock member 51 and the handling room case in which the handling room case 3 is fixed in the maintenance work posture. The support member 57 is connected, and the handling chamber case support member 57 is released from the fixed posture based on the operation of the fixing release lever 3L, and the handling chamber case 3 in the maintenance work posture is rotated downward to return to the threshing work posture. By adopting the chamber opening / closing operation structure, the lock member 51 and the chamber case support member 57 can be unlocked and unlocked by operating the lock release lever 3L. In doing so, it can be performed by a one-touch operation of only a single fixing release lever 3L installed on the outlet side plate 32 side. Therefore, it is possible to efficiently perform maintenance work that prevents erroneous operation without selecting and operating a plurality of levers as in the prior art. In addition, an inexpensive operation structure for opening and closing the chamber can be achieved with a small number of parts.

  Further, in the chamber opening / closing operation structure, the connecting member (wire) 59 provided on the side of the chamber case support member 57 is connected to the fixing release lever 3L or the linkage 52 connecting the fixing release lever 3L and the lock member 51. Thus, when the chamber case support member 57 in the fixed posture is configured to be switched to the lock release posture, the lock member 51 can be unlocked and the chamber case support member 57 can be released by operating only the single lock release lever 3L. Unlocking can be facilitated, and the handling chamber opening / closing operation structure can be configured simply. Furthermore, the support lock mechanism 5b in which the chamber case support member 57, the support switching rod 58, etc. are installed on the front side of the case arm 3M on the outlet side plate 32 side as shown in FIG. It can be installed in a compact space in the space to be formed, and the handling / opening / closing operation structure can be made simple and inexpensive.

  Next, a handling chamber opening / closing operation structure according to a second embodiment of the present invention will be described with reference to FIG. The description of the same configuration and operation as those of the first embodiment will be omitted. This chamber opening / closing operation structure includes a support lock mechanism 5b, a chamber case support member 57 that supports the chamber case 3 in a maintenance work posture, and a support that switches the chamber case support member 57 from a fixed posture to a fixed release posture. The switching member 70 and the like are used. The handling chamber case support member 57 is formed with a stopper portion 57a similar to the handling chamber case support member 57 of the first embodiment at the tip, and the other end protruding from the threshing lower machine casing 1a. It pivotally supports 32c so that rotation is possible.

  Further, the support switching member 70 in the illustrated example uses the lock member 51 and uses an attachment shaft 51b for attaching a connecting rod 52 to the lock member 51. The chamber case support member 57 faces the mounting shaft 51b with its lower side slidably placed on the upper side of the connecting rod 52. Further, the lock member 51 is provided with a release shaft 72 for releasing the engagement between the mounting shaft 51b and the stopper portion 57a in the vicinity of the mounting shaft 51b. The support switching member 70 is not limited to the one that also serves as the attachment shaft 51b, and may be performed by changing the shape of the lock member 51 itself.

  With this configuration, when the handling chamber case 3 is put into the maintenance work posture, when the fixing release lever 3L is operated upward, the lock member 51 rotates about the mounting shaft 32a and disengages from the fixing piece 54. Based on the operation in which the chamber case 3 is rotated upward, the chamber case support member 57 follows the fixed position indicated by the dotted line while rotating upward. At this time, the mounting shaft 51b is automatically moved to the stopper portion 57a. Engage. Thus, the handling chamber case 3 can maintain the maintenance work posture supported by the handling chamber case support member 57 via the mounting shaft 51b.

  Further, the switching operation of the handling chamber case 3 to the threshing work posture is performed by first operating the fixing release lever 3L upward while supporting the handling chamber case 3 in the maintenance work posture by hand, as in the first embodiment. Since the lock member 51 rotates about the attachment shaft 32a via the connecting rod 52, the attachment shaft 51b is detached from the stopper portion 57a. At this time, the release shaft 72 protruding from the lock member 51 pushes the chamber case support member 57 with its lower side facing upward, thus assisting the release of the engagement between the mounting shaft 51b and the stopper portion 57a. .

  As described above, the support switching member 70 is provided in the lock member 51, and the handling case support member 57 in the fixed posture is switched to the fixed release posture by the support switching member 70 based on the fixing release operation of the fixing release lever 3L. Since the handling chamber opening / closing operation structure configured as described above does not require the connection member 52 such as the release wire or the connecting piece for the unlocking of the handling chamber case support member 57 by the operation of only the single fixing release lever 3L. The opening / closing operation structure can be made simple and inexpensive, and can be installed in a compact manner.

  Next, the swing selection mechanism 14 provided in the threshing machine will be described with reference to FIGS. 2, 8, 9, and 10. The swing sorting mechanism 14 is supported so as to be swingable in the front-rear direction below the receiving net 13 in a sorting air passage 1c formed in the front-rear direction within the threshing lower machine casing 1a. The oscillating sorting mechanism 14 in the illustrated example has a configuration similar to that of a conventional sorter frame 14a having a square shape in plan view, and is received via a chaff sheave 86 installed in the upper and lower stages and a sorting net (not shown). The threshing that has leaked from the net 75 is sorted while receiving it upstream in the sorting direction, and the first product (selected grain) is supplied to the first basket 87 and the second product is supplied to the second basket. Is transferred to the downstream side in the sorting direction, screened by a Strollack portion 89 formed at the end portion of the chaff sheave 86, and discharged out of the machine. The Strollac portion 89 of the swing sorting mechanism 14 is good while leveling the left side waste left in a state of being largely unevenly distributed toward the back side (left side) of the sorting chamber due to the rotation of the handling cylinder 21. It promotes sieving and discharging.

  That is, as shown in FIG. 9, the stroller portion 89 has a plurality of rack plates 90 with protruding teeth formed on the upper side in a saw blade shape on the upper portion of the rear wall 91 of the sorter frame 14 a from the end portion of the chaff sheave 86. And projecting with a predetermined sorting interval. In the plan view, each rack plate 90 is disposed so as to incline in a slanted parallel shape with the tip that is a free end from the base side toward the right side. As a result, the swarf that is unevenly distributed to the left side from the ends of the receiving net 13 and the chaff sheave 86 is unraveled toward the right side as a whole by the inclination of each rack plate 90 in a plan view, and is in a state of being leveled. Since the wind is sorted while receiving the rack feed to which is applied, good sieve sorting and discharge are promoted.

  Therefore, the swarf sorting mechanism 14 moves the swarf that is supplied in a large amount biased toward the inside of the machine body (left side) toward the outside of the machine body (right side), so that the sieving selection by the Strollac portion 89 is performed. In order to make it smooth, there is a feature that mixing of sawdust into the second reduced product falling from the stroller portion 89 can be reduced. The Strollac portion 89 forms a triangular left gap portion 92 and a right gap portion 93 between the rightmost rack plate 90 and the leftmost rack plate 90 between the sorter frame 14a. If necessary, a small auxiliary rack plate 95 as indicated by a dotted line in FIG. 9 may be provided in the gap portion according to the situation such as the size of the gap.

  Each rack plate 90 of the Strollac portion 89 has its tip aligned with a line indicated by a dotted line locus A (FIG. 9) so as to be parallel to the rear wall 91. May be provided so as to coincide with the dotted locus B inclined backward. In this case, the gap between each rack plate 90 that coincides with the rear wall 91 and the dotted line locus B is gradually increased toward the right side to promote the reduction and fall of the sawdust into the swing sorting mechanism 14. Can do. For this reason, in particular, in a threshing machine in which a suction type dust exhaust fan is installed on the upper right side of the stroller portion 89, the wastes attracted by the suction air are excessively accumulated near the right side of the stroller portion 89. Therefore, the threshing work that prevents clogging of dusts in the dust exhaust fan can be performed smoothly.

  Further, as shown in FIG. 10, the above-mentioned stroller portion 89 may be arranged so that the height of each rack plate 90 is inclined downward from the left side to the right side. There is a feature that the swarf that is unevenly distributed in a large amount can be screened and transferred to the left side more quickly along the downward slope to facilitate the discharge of the swarf.

DESCRIPTION OF SYMBOLS 1 Threshing machine 1a Threshing lower machine frame 2 Discharge conveyance apparatus 3 Handling chamber case 3L Unlocking lever 5 Locking mechanism 5b Supporting lock mechanism 6 Fixing mechanism 11 Handling chamber 12 Handling cylinder 31 Inlet side plate 32 Outlet side plate 33 A fulcrum shaft
51 Locking member 59 Linking member 70 Support switching member

Claims (4)

The handling chamber case (3) for pivotally supporting the handling cylinder (12) between the inlet side plate (31) and the outlet side plate (32) is moved up and down with the fulcrum shaft (33) on the rear side of the machine body as the pivot point. While rotatably supported, the handling case (3) is pivoted downward to the threshing posture, and is fixed to the threshing lower machine frame (1a) via the lock mechanism (5) so as to be detachable. When the lock mechanism (5) is unlocked by operating the lock release lever (3L) and the handling case (3) is rotated upward from the threshing work posture to the maintenance work posture, the handling case (3 ) Is engaged with the support lock mechanism (5b) and can be fixed to the maintenance work posture.
Threshing is characterized in that when the handling case (3) is fixed in a maintenance work posture, the fixing of the support lock mechanism (5b) can be released by operating the fixing release lever (3L). Opening / closing operation structure of the machine's handling room. The handling chamber case (3) for pivotally supporting the handling cylinder (12) between the inlet side plate (31) and the outlet side plate (32) is moved up and down with the fulcrum shaft (33) on the rear side of the machine body as the pivot point. While rotatably supported, the handling case (3) is pivoted downward to the threshing posture, and is fixed to the threshing lower machine frame (1a) via the lock mechanism (5) so as to be detachable. When the lock member (51) of the lock mechanism (5) is unlocked by operating the lock release lever (3L) and the handling case (3) is rotated upward from the threshing work posture to the maintenance work posture, In the chamber opening / closing operation structure of the threshing machine configured to engage the chamber case support member (57) of the support lock mechanism (5b) with the chamber case (3) and to be able to be fixed to the maintenance work posture,
A lock release lever (3L) for releasing the lock member (51) is connected to a handling chamber case support member (57) that fixes the handling chamber case (3) in a maintenance work posture. 3. The handling chamber opening / closing operation structure of the threshing machine according to claim 1, wherein the fixed posture of the handling case support member (57) can be released based on the operation of 3 L).   The handling chamber case support member (57) in the fixed posture is switched to the fixed release posture by the fixing release lever (3L) or the connecting member (52) connecting the lock release lever (3L) and the lock member (51). By connecting the connecting member (59) connected to the support switching rod 58, the handling chamber case support member (57) in the fixed posture is supported on the connecting member (59) and the support based on the operation of the fixing release lever (3L). The threshing machine opening / closing operation structure of the threshing machine according to claim 2, wherein the threshing machine is configured to be switched to a fixed release posture via a switching rod (58) or the like.   The lock member (51) is provided with a support switching member (70) that engages with the chamber case support member (57) that fixes the chamber case (3) in the maintenance work posture, and the lock release lever (3L) can be operated. The handling chamber opening / closing operation structure of the threshing machine according to claim 2, wherein the handling chamber case support member (57) and the support switching member (70) are configured to be freely disengaged.

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