JP2020124164A - Farm field work machine - Google Patents

Abstract

To provide a farm field work machine having a canopy that is firmly supported on a travelling machine body and whose vertical height is easily changed.SOLUTION: A farm field work machine includes: a travelling machine body C capable of travelling in a farm field; a work device W capable of performing work for the farm field; a boarding part 25 provided on the travelling machine body C over a horizontal width of the travelling machine body C; a first support part 32 and 33 erected in a region on one end side of the travelling machine body C; a second support part 42 erected in a region on the other end side of the travelling machine body C; a satellite positioning unit 34 supported by the first support part 33 capable of detecting the position of the travelling machine body C by using a navigation satellite; a canopy 40 swingably supported by the first support part 33, and supported by the second support part 42 for covering the boarding part 25 from above; and a vertically lifting and lowering mechanism 5 provided to the upper end part of the second support part 42 capable of vertically lifting and lowering the canopy 40.SELECTED DRAWING: Figure 1

Description

The present invention relates to a field work machine including a traveling machine body that can travel in a field, a riding section provided on the traveling machine body, and a canopy that covers the riding section from above.

For example, Patent Document 1 discloses a paddy field working machine as an example of a field working machine, and this paddy field working machine is provided with a canopy (“roof” in the document) that covers an upper part of a riding section (“driving seat” area in the document). Has been. The canopy is supported by a front support section ("support frame" in the literature) extending upward from the front section of the airframe.

JP, 2016-67259, A

By the way, the canopy disclosed in Patent Document 1 is configured to be able to change the tilted posture of the canopy with respect to the front support portion, but it is necessary for an operator or an assistant to support the canopy by hand when changing the tilted posture. There is. For this reason, it is desirable that the canopy has a simpler structure than the canopy disclosed in Patent Document 1 and can change the vertical height.

Further, although the canopy disclosed in Patent Document 1 is cantilevered only by the front support portion, it is desirable that the canopy be supported not only at the front portion but also at the rear portion in consideration of the case where the canopy is fanned by the wind. ..

An object of the present invention is to provide a field working machine having a canopy which is firmly supported by a traveling machine body and whose vertical height can be easily changed.

A field working machine according to the present invention is a traveling machine capable of traveling in a field, a working device capable of working on the field, a riding section provided on the traveling machine over the lateral width of the traveling machine, and the traveling machine. Of the traveling body, the second supporting portion is erected in the area on the other end side, and the navigation is supported by the first supporting portion. A satellite positioning unit capable of detecting the position of the traveling body using a satellite, and a canopy that is swingably supported by the first support portion and is supported by the second support portion to cover the riding portion from above. And a vertically elevating mechanism that is provided at the upper end of the second support part and is capable of vertically elevating the canopy, and the canopy has a height at the end on the side where the second support part is located. A work position lower than the upper end of the satellite positioning unit, and an auxiliary work position that is higher than the upper end of the satellite positioning unit and that is higher than the upper end of the satellite positioning unit with the height of the end on the side on which the second support is located inclined with respect to the work position. The vertical height can be switched to and.

According to the present invention, the canopy is supported by the first supporting portion and supported by both ends of the second supporting portion. Therefore, even if the canopy is fanned by the wind, the structure for supporting the canopy becomes stronger than the structure in which the canopy is supported in a cantilever manner. Further, the canopy is configured to be vertically movable by the vertical lifting mechanism in the second support part in a state where the canopy is swingably supported by the first support part. That is, since one end of the canopy is firmly supported by the first support portion, an operator or an assistant can easily perform the vertical ascending/descending operation of the canopy. Further, the first support portion is used both as a support structure as a swing fulcrum of the canopy and as a support structure for the satellite positioning unit. With this configuration, since the free end of the canopy is separated from the satellite positioning unit, even if the height of the end of the canopy on the side where the second support portion is located is higher than the upper end of the satellite positioning unit, The possibility of affecting the positioning accuracy of the satellite positioning unit is minimized. As described above, according to the present invention, a field working machine having a canopy that is firmly supported by a traveling machine body and whose vertical height can be easily changed is realized.

In the present invention, it is preferable that the working device is provided on the rear side of the traveling machine body, and the second support portion is provided on a side of the traveling machine body on which the working device is located with respect to the first support portion. Is.

According to this configuration, since the second support part is located closer to the working device than the first support part in the state where the second supporting part is provided with the vertical lifting mechanism, the canopy is higher on the side where the working device is located. A tilted configuration is possible. In other words, since the vertical height of the canopy increases toward the side where the work device is located, when the worker in the riding section faces the side where the work device is located, a sufficient working space for the passenger is secured. It will be easier.

In the present invention, it is preferable that a biasing mechanism that is supported by the first support portion and that biases the canopy to swing upward is provided.

With this configuration, when the vertical height of the canopy is switched from the work position to the auxiliary work position, the canopy swings upward due to the biasing mechanism, so that the operator can more easily switch the vertical height of the canopy. be able to.

In the present invention, it is preferable that a grip portion for vertically moving the canopy is provided at a lower portion of the canopy on a side where the vertically moving mechanism is located.

With this configuration, the vertical height of the canopy can be switched from the auxiliary work position to the work position simply by the operator holding and pulling the grip portion.

In the present invention, it is preferable that the vertical elevating mechanism is provided with a swinging link member whose end portions are connected to each other and which can be folded in a vertically overlapping state and which is vertically expandable and contractible.

With this configuration, even when the vertical height of the canopy is switched from the work position to the auxiliary work position by interposing the swinging link member between the canopy and the second support portion, the canopy swings. It is supported by the second support portion via the moving link member. Further, since the swing link member has a structure in which the ends are connected to each other, a support mechanism that can be vertically expanded and contracted is realized with a simple structure.

In the present invention, in the vertical lifting mechanism, a first engaging portion provided on one of the canopy and the second supporting portion and a first engaging portion provided on the other of the canopy and the second supporting portion are provided. A second engaging portion engageable with the engaging portion, wherein the first engaging portion engages with the second engaging portion and an engaging position capable of engaging the second engaging portion. When the canopy is swung in the direction of the working position and the pressing force of the second engaging portion acts on the first engaging portion, It is preferable that the first engaging portion is configured to be switched to the retracted position side.

With this configuration, even when the canopy operates toward the work position side or the auxiliary work position side and the first engagement portion and the second engagement portion interfere with each other, the canopy remains in the work position side or the assistance position. The first engaging portion is switched to the retreat position side simply by moving to the work position side. As a result, when the occupant switches the vertical height of the canopy, it is not necessary to switch the first engagement portion to the retracted position in advance, and the occupant's burden is reduced.

It is a machine body left side view showing a riding type rice transplanter as a field work machine. It is a top view which shows the riding type rice transplanter as a field working machine. It is a machine body left side view showing a riding type rice transplanter when a canopy is in an auxiliary work position. FIG. 6 is a left side view of the machine body showing the canopy in a working position. FIG. 6 is a left side view of the machine body showing the canopy in the auxiliary work position. FIG. 6 is a left side view of the machine body showing the vertical lifting mechanism in the canopy at the work position. FIG. 8 is a left side view of the machine body showing the vertical lifting mechanism in the canopy at the auxiliary work position. FIG. 4 is a partial rear view showing a grip portion of the canopy and its periphery. FIG. 7 is a left side view of the machine body showing the vertical lifting mechanism when switching from the auxiliary work position to the work position. FIG. 7 is a left side view of the machine body showing the vertical lifting mechanism when switching from the auxiliary work position to the work position. FIG. 7 is a left side view of the machine body showing the vertical lifting mechanism when switching from the auxiliary work position to the work position. It is a bottom view which shows an example of a structure of the hood part in a canopy. FIG. 9 is a left side view of the airframe showing another embodiment of the canopy.

[Basic configuration of farm work equipment]
An embodiment of the present invention will be described with reference to the drawings. Here, a riding type rice transplanter will be described as an example of the field working machine. In FIG. 2, the arrow “F” indicates the forward direction of the traveling body C, the arrow “B” indicates the backward direction of the traveling body C, the arrow “L” indicates the left direction of the traveling body C, and the arrow “R” indicates. It is the right direction of the traveling body C.

As shown in FIG. 1 to FIG. 3, the riding type rice transplanter has a pair of left and right steering wheels 10 and 10 and a pair of left and right rear wheels 11 and 11, and is capable of traveling in a field. Aircraft C is provided. Further, the seedling planting device W as a working device is supported and connected to the rear part of the traveling machine body C so as to be able to move up and down, and the seedling planting device W is configured to be capable of transplanting seedlings to a field. The pair of left and right steered wheels 10 are provided on the front part of the machine body of the traveling machine body C so that the direction of the traveling machine body C can be changed, and the pair of left and right rear wheels 11 are provided on the rear part of the machine body of the traveling machine body C. Has been. The seedling planting device W is movably connected to the rear end of the traveling machine body C via a link mechanism 17. The link mechanism 17 is moved up and down by the expansion and contraction of the lifting hydraulic cylinder 16.

At the front of the traveling machine body C, an engine 13 as a prime mover capable of driving the traveling machine body C to travel and an openable hood 12 are provided. The bonnet 12 has an inclined surface that is inclined rearward and is configured to accommodate the engine 13. Although not described in detail, the steering wheel 10, the rear wheel 11, or both are provided with a speed change mechanism (not shown) for transmitting the power of the engine 13. The power of the engine 13 is transmitted to the steered wheels 10 and the rear wheels 11 via a speed change mechanism provided in the airframe, and the power after the speed change is planted with seedlings through an electric motor driven planting clutch (not shown). It is transmitted to the device W. The traveling machine body C is provided with a machine body frame 14 extending along the front-rear direction, and a support column frame 15 is provided upright on the front portion of the machine body frame 14.

The seedling planting device W is provided with a plurality (for example, four) of transmission cases 18, a plurality of (for example, eight) rotating cases 19, a ground leveling float 21, and a seedling platform 22. The rotating case 19 is rotatably supported on the left side and the right side of the rear part of each transmission case 18, respectively. A pair of rotary type planting arms 20 are provided at both ends of each rotating case 19. The leveling float 21 is for leveling the rice field in the field, and a plurality of seedling planting devices W are provided. A mat-like seedling for planting is placed on the seedling placing table 22.

The seedling planting device W rotationally drives the seedling placing table 22 to the left and right, and at the same time, rotationally drives each rotating case 19 by the power transmitted from the transmission case 18, so as to plant each seedling from the lower portion of the seedling placing table 22. The seedlings are taken out alternately by the arm 20 and planted on the rice field in the field. Although not shown, the seedling planting device W is configured to plant seedlings by the planting arms 20 provided on the plurality of rotating cases 19.

Although not described in detail, the marker device 23 is configured to be switchable between a working posture and a storage posture. In the state of the working posture, the marker device 23 grounds on the rice field in the field as the traveling machine body C travels, and forms an index line (not shown) on the rice field corresponding to the next work process. In the storage posture, the marker device 23 moves upward from the rice field in the field. The posture of the marker device 23 is switched by an electric motor (not shown). A rod-shaped center mascot 24 is provided at the tip position of the bonnet 12, and the center mascot 24 is a mark for traveling along an index line drawn on the field by the marker device 23.

At the center of the traveling machine body C, a riding section 25 for performing various driving operations is provided. The riding section 25 is provided on the traveling body C over the lateral width of the traveling body C. The riding section 25 includes a riding seat 26, a steering handle 27, and various operating tools such as a main gearshift lever 28. The passenger seat 26 is provided in the central portion of the traveling machine body C, and is configured so that an occupant (the occupant may be an operator; the same applies hereinafter) can be seated. The steering wheel 27 is configured so that the steering wheel 10 can be steered by a manual operation. Switching operation between forward and backward traveling of the traveling machine body C and changing operation of the traveling speed can be performed, for example, by operating the main shift lever 28 and the like, and raising and lowering operation of the seedling planting device W can be performed by various operating tools of the riding section 25. is there. A floor portion 30 is provided at a foot portion of the boarding portion 25, and step-on/off steps 35 are provided on both right and left sides of the floor portion 30. The boarding/alighting step 35 is configured so that a passenger can get on and off the boarding section 25 from the right and left sides of the boarding section 25. A canopy 40 described later is provided above the riding section 25.

A foldable first preliminary seedling placing table 31 having rails is provided on the left and right outside of the hood 12 of the traveling machine body C. The first preliminary seedling placing table 31 is configured so that a preliminary seedling for supplying to the seedling planting device W can be placed. A pair of left and right front frames 32, 32 are provided on the left and right outer sides of the hood 12 of the traveling machine body C. The front frame 32 is connected to the support column frame 15. The front frame 32 and the support column frame 15 may be integrally configured. The first preliminary seedling placing table 31 is supported by the front frame 32.

A hinge 33A is provided on each of the upper end portions of the pair of left and right front frames 32, 32, and the connecting portion 33 is horizontally laid vertically swingably over the pair of left and right hinges 33A, 33A. The connecting portion 33 is configured to be capable of swinging up and down around a shaft axis in the body lateral direction via a pair of hinges 33A and 33A. By swinging the connecting portion 33, the connecting portion 33 is configured to be switchable between a state in which the upper portion of the front frame 32 extends upward and a state in which the upper portion of the front frame 32 extends downward.

The satellite positioning unit 34 is attached to the upper portion of the connecting portion 33. The satellite positioning unit 34 is configured to be able to detect the position of the traveling body C by receiving radio waves transmitted from a plurality of navigation satellites that orbit the earth.

[About the structure of the canopy]
As shown in FIGS. 1 to 3, a canopy 40 is provided above the riding section 25. A pair of swinging pivotally supporting portions 41, 41 are swingably connected to the front portion of the canopy 40 at two left and right positions. A pair of rocking pivotally supporting portions 41, 41 are fitted on the left and right ends of the upper portion of the connecting portion 33. Thereby, the canopy 40 is configured to be swingable around the pair of swing pivotally supporting portions 41, 41. In the present embodiment, the pair of left and right front frames 32, 32 and the connecting portion 33 constitute the “first support portion” of the present invention, and the region on the one end side of the canopy 40 is the first support portion. Is supported. The connecting portion 33 is used both as a support structure as a swing fulcrum of the canopy 40 and a support structure for the satellite positioning unit 34.

A pair of rear frames 42, 42 as the “second support portion” of the present invention are erected from the left and right ends of the rear portion of the traveling machine body C. The pair of rear frames 42, 42 are provided laterally outside the vehicle body with respect to the boarding/alighting step 35 in the lateral direction of the vehicle body. The pair of left and right rear frames 42, 42 is located rearward of the aircraft body with respect to the step-on/off step 35 and inside the aircraft body with respect to the left and right ends of the seedling planting device W as a working device. As a result, the canopy 40 can cover the riding section 25 from above while being firmly supported from the rear portion of the riding section 25 (or the rear side of the riding section 25). Further, the pair of left and right rear frames 42, 42 are located inside the machine body with respect to the left and right ends of the seedling planting device W. Therefore, as compared with the configuration in which the rear frames 42, 42 are located outside the left and right ends of the seedling planting device W, the possibility that the rear frames 42, 42 contact an obstacle or the like in the field is reduced. ..

A pair of engaging recesses 54, 54 (see FIGS. 4 to 7) are connected to the left and right end portions of the canopy 40 in the region near the rear of the canopy 40, respectively. The location of the recess 54 is supported by the rear frame 42.

In this way, the canopy 40 is swingably supported by the first support portion (a pair of left and right front frames 32, 32 and the connecting portion 33, which is the same hereinafter), and the second support portion (a pair of left and right rear frames 42, 42, the same applies hereinafter) to cover the riding section 25 from above. In the present embodiment, the seedling planting device W as a working device is provided behind the traveling machine body C, and the second support portion is closer to the side where the seedling planting device W is located than the first support portion of the traveling machine body C. It is provided in.

As shown in FIGS. 1, 3 to 5, and 12, the canopy 40 includes an outer frame 40A, a front horizontal frame 40B, an intermediate horizontal frame 40C, a rear horizontal frame 40D, and front and rear frames 40E. Have. These frames may be made of metal or may be made of resin such as polyvinyl chloride.

The outer frame 40A is configured by a combination of a plurality of pipe frames. The front horizontal frame 40B, the intermediate horizontal frame 40C, and the rear horizontal frame 40D are rod-shaped members that extend in the lateral direction of the machine body inside the outer frame 40A. Both ends of the front horizontal frame 40B, the intermediate horizontal frame 40C, and the rear horizontal frame 40D are connected to both left and right sides of the outer frame 40A. The front and rear frames 40E are rod-shaped members extending in the front-rear direction. Both ends of the front and rear frame 40E are connected to the front horizontal frame 40B and the intermediate horizontal frame 40C, respectively.

A grip portion 40F is fixed to a lower portion of the canopy 40 on the side where the vertical lifting mechanism 5 is located, that is, a lower portion of the rear lateral frame 40D. The grip portion 40F is configured such that an occupant seated on the passenger seat 26 stands up and grips the grip portion 40F to perform an up/down operation of the canopy 40. The grip portion 40F is located between the boarding seat 26 and the front end of the seedling placing table 22 in a side view. The grip portion 40F extends laterally along the longitudinal direction of the rear lateral frame 40D. Therefore, a passenger standing up from the passenger seat 26 can operate the grip portion 40F from the left side or the right side of the passenger seat 26.

The canopy 40 covers the riding section 25 by covering the flexible hood 43 from above inside the outer frame 40A. The hood 43 covers the riding section 25 from above the outer frame 40A, the front horizontal frame 40B, the intermediate horizontal frame 40C, the rear horizontal frame 40D, and the front and rear frames 40E. Although the hood 43 is not shown in FIGS. 6 to 11, the hood 43 actually exists in these drawings.

The front end of the canopy 40 is located on the front side of the upper end of the inclined surface of the hood 12. Therefore, even when rainwater drips from the front end of the canopy 40, the rainwater falls on the hood 12 and slides forward along the inclined surface. Therefore, it is possible to reduce the risk of rainwater dripping on the steering handle 27 of the riding section 25 and various meter devices on the front side of the steering handle 27.

The pair of left and right swing pivotally supporting portions 41, 41 is connected to the outer frame 40A. The pair of swinging pivotally supporting portions 41, 41 are located at the left and right ends of the upper portion of the connecting portion 33, and the satellite positioning unit 34 is arranged between the pair of swinging pivotally supporting portions 41, 41. For this reason, the satellite positioning unit 34 is configured to be supported by the first support portion and to detect the position of the traveling body C using the navigation satellite.

As shown in FIGS. 1 and 3 to 5, an expandable air damper 40G is provided between the swinging pivotally supporting portion 41 and the front lateral frame 40B so that the air damper 40G extends along the longitudinal direction. Is urged by. Therefore, the canopy 40 is biased by the air damper 40G so as to swing upward. That is, the air damper 40G as a biasing mechanism is supported by the first support portion and biases the canopy 40 so as to swing upward.

The height of the canopy 40 is configured to be switchable in two steps. In the embodiment shown in FIGS. 1 and 4, the canopy 40 is horizontal or substantially horizontal in the front-rear direction. The vertical height of the upper end of the canopy 40 at this time is lower than the upper end of the satellite positioning unit 34. In this embodiment, this position is called a "working position". As shown in FIG. 4, the positioning accuracy of the satellite positioning unit 34 is sufficiently ensured when there is no obstacle or the like in the area above the interference line L inclined by the ground angle α. That is, since the canopy 40 at the work position is located in the area below the interference line L, the canopy 40 does not affect the positioning accuracy of the satellite positioning unit 34.

In the embodiment shown in FIG. 3 and FIG. 5, the canopy 40 is inclined rearward and upward toward the rear side. The vertical height of the upper end of the canopy 40 at this time is higher than the upper end of the satellite positioning unit 34. Thereby, when the passenger stands up from the passenger seat 26 and performs the mat seedling replenishing work on the seedling placing table 22, the working space for the passenger is easily secured. In this embodiment, this position is referred to as an "auxiliary work position". As shown in FIG. 5, since the canopy 40 in the auxiliary work position has a portion located in a region above the interference line L, the canopy 40 may affect the positioning accuracy of the satellite positioning unit 34. .. Even in that case, since the free end of the canopy 40 is separated from the satellite positioning unit 34, the possibility that the canopy 40 affects the positioning accuracy of the satellite positioning unit 34 is minimized.

As described above, the canopy 40 is located at the working position in which the height of the end portion on the side where the second support portion is located is lower than the upper end portion of the satellite positioning unit 34, and the second support portion is inclined with respect to the working position. It is configured such that the vertical height can be switched to an auxiliary work position in which the height of the side end is higher than the upper end of the satellite positioning unit 34.

[About the vertical movement mechanism of the canopy]
As shown in FIGS. 4 to 7, a pair of left and right vertical lifting mechanisms 5 and 5 are provided across the upper ends of the left and right rear frames 42, 42 and the left and right both sides of the rear part of the canopy 40. The vertical moving mechanisms 5 and 5 respectively support the rear part of the canopy 40 so as to be able to move up and down. In other words, the vertical lifting mechanism 5 is provided at the upper end of the second support portion and is configured to vertically lift the canopy 40. The vertical lifting mechanism 5 includes an upper end support portion 50, a first engagement portion 51, a first swing link 52A and a second swing link 52B as "swing link members" in the present invention, and an engaging recessed portion. 54 and a second engagement portion 55. Further, as shown in FIGS. 6 to 8, the vertical lifting mechanism 5 includes a support shaft portion 56 and an engagement release operation tool 57.

As shown in FIGS. 6 and 7, the upper end support portion 50 is supported by the rear frame 42. A second engaging portion 55 capable of engaging with the first engaging portion 51 is connected to the front portion of the upper end supporting portion 50. One end of the first swing link 52A is connected to the rear portion of the upper end support portion 50 so as to be swingable around the first axis P1 via a first series contact pin 52E. The other end of the first swing link 52A is connected to the second swing link 52B. The respective ends of the first swing link 52A and the second swing link 52B are connected to each other via a second connecting pin 52F so as to be swingable around the second axis P2. Further, the end of the second swinging link 52B opposite to the side where the second connecting pin 52F is located swings around the third axis P3 via the rear portion of the engaging recess 54 and the third connecting pin 52G. It is movably connected. The end of the first swing link 52A on the side opposite to the side on which the first axis P1 is located is bent upward in the machine body in the longitudinal direction.

The pair of left and right engaging recesses 54, 54 are fixed to the outer frame 40A at positions corresponding to the upper end supporting portion 50 in the lower portions of the left and right side portions, respectively. That is, the engagement recessed portion 54 is connected downward to the canopy 40. As shown in FIGS. 9 to 11, a recess 54a is formed in the engagement recess 54, and the recess 54a is formed so as to recess from the lower side to the upper side.

When the canopy 40 is in the working position, the second engagement portion 55 enters the recess 54a of the engagement recess 54, as shown in FIGS. 4, 6, and 11. Then, the first engaging portion 51 is hooked on the second engaging portion 55 so that the up-and-down lifting mechanism 5 is configured to be able to hold the canopy 40 at the working position. In this case, as shown in FIG. 6, the first swing link 52A and the second swing link 52B are folded in a state in which the longitudinal direction is along the front-rear direction and in a state of being stacked vertically. There is.

When the canopy 40 is in the auxiliary work position, as shown in FIGS. 5 and 7, the engagement recess 54 is in a state of swinging above the work position together with the canopy 40. In this case, the first swing link 52A inclines rearward and upward from the first axis P1, and the second swing link 52B inclines frontward and upward from the second axis P2. In other words, the second swing link 52B is inclined rearward and downward when viewed from the third axis P3. As described above, the first swing link 52A and the second swing link 52B as swing link members are configured such that the end portions are connected to each other and can be folded in a vertically overlapping state and vertically expandable and contractible. ing.

A first locking surface 52c is formed in a portion of the first swing link 52A below the second shaft core P2, and a first locking surface 52c is formed in a portion of the second swing link 52B behind the second shaft core P2 of the machine body. Two locking surfaces 52d are formed. When each of the first swing link 52A and the second swing link 52B swings upward, the first locking surface 52c and the second locking surface 52d are located at a position where the canopy 40 reaches the auxiliary work position. Abut each other. Therefore, the first swing link 52A and the second swing link 52B cannot swing above the abutting portion. Therefore, when the first locking surface 52c and the second locking surface 52d come into contact with each other, the canopy 40 cannot swing further upward. Further, as described above, since the canopy 40 is biased by the air damper 40G so as to swing upward, unless the force that swings downward acts on the canopy 40, the first locking surface 52c and the second locking surface 52d are held in contact with each other. As a result, the canopy 40 is held at the auxiliary work position.

As shown in FIGS. 6 to 8, the first engaging portion 51 is connected to the support shaft portion 56, and is integrally rotatable with the support shaft portion 56 around the lateral axis X. 51 is configured. The lateral axis X is a horizontal axis along the lateral direction of the machine body. Both ends of the support shaft portion 56 are supported by the engagement recessed portion 54 and the left and right end portions of the grip portion 40F. The first engaging portion 51 and the support shaft portion 56 are provided in the left-right pair of vertical elevating mechanisms 5, 5 so as to be bilaterally symmetrical, and the left-right pair of support shaft portions 56, 56 are arranged along the lateral axis X. Are provided. Then, the pair of left and right support shaft portions 56, 56 are connected by the engagement release operation tool 57, and the engagement release operation tool 57 is displaced rearward and downward with respect to the lateral axis X.

As shown in FIGS. 9 to 11, a hook portion 51A is provided at the free end portion of the first engagement portion 51. 9 and 11 show a state in which the hook portion 51A closes the opening at the bottom of the recess 54a. This position is the “engagement position” of the first engagement portion 51. Further, FIG. 10 shows a state in which the hooking portion 51A is laterally displaced with respect to the recess 54a. This position is the “retracted position” of the first engagement portion 51. The canopy 40 is held at the working position by locating the first engaging portion 51 at the engaging position while the second engaging portion 55 is inserted in the concave portion 54a of the engaging concave portion 54. Thereby, the first engaging portion 51 is configured to be switchable between an engaging position where the second engaging portion 55 can be engaged and a retracted position where the second engaging portion 55 is not engaged. Has been done.

A lower cam portion 51c is formed on the lower portion of the hook portion 51A, and an upper cam portion 51d is formed on the upper portion of the hook portion 51A. The lower cam portion 51c, the upper cam portion 51d, and the second engagement portion 55 are configured to be capable of contacting each other. The lower cam portion 51c inclines upward toward the engagement position side in the side views of FIGS. 9 to 11. Further, the tip end portion of the upper cam portion 51d also inclines upward toward the engagement position side in the side view in FIGS. 9 to 11.

When switching the canopy 40 from the auxiliary work position to the work position, when the passenger pulls the grip portion 40F downward, the canopy 40 swings downward and the second engagement portion 55 and the engagement recessed portion 54 are separated from each other. approach. At this time, as shown in FIG. 9, when the hooking portion 51A closes the opening of the recess 54a, the second engaging portion 55 and the lower cam portion 51c come into contact with each other. Then, when the passenger pulls the grip portion 40F further downward (the direction of the arrow "DW"), the pressing force of the second engagement portion 55 acts on the lower cam portion 51c. Since the lower cam portion 51c inclines upward toward the engagement position side, the pressing force of the second engagement portion 55 depends on the force in the upward direction of the machine body (the direction opposite to the arrow "DW") and the first engagement portion. The force in the retracted position side of 51 (direction of arrow “CW”) is dispersed. As a result, as shown in FIG. 10, the first engagement portion 51 moves toward the retreat position side (the direction of arrow “CW”) with the sliding of the second engagement portion 55 and the lower cam portion 51c. It swings, and the second engaging portion 55 enters the recess 54a.

In this way, when the canopy 40 swings toward the working position and the pressing force of the second engaging portion 55 acts on the first engaging portion 51, the first engaging portion 51 switches to the retracted position side. It is configured to be.

Then, as shown in FIG. 11, the first engagement portion 51 swings in the engagement position side direction (the direction of the arrow "CCW"), and the hook portion 51A closes the opening of the recess 54a. The second engaging portion 55 and the first engaging portion 51 are brought into the engaged state, and the vertical swing of the canopy 40 is restricted. The first engagement portion 51 may swing in the direction toward the engagement position (the direction of the arrow "CCW") by providing a biasing mechanism such as a coil spring or a torsion spring. .. In addition, as a configuration in which the first engaging portion 51 swings in the direction toward the engaging position side (direction of arrow “CCW”), a cam that can contact the second engaging portion 55 from above is, for example, It may be formed at the position of the reference numeral 51B in the one engaging portion 51. The first engagement portion 51 may swing toward the engagement position side as the cam and the second engagement portion 55 slide.

In the engaged state of the second engagement portion 55 and the first engagement portion 51, a force that swings upward acts on the canopy 40, and the engagement position side of the upper cam portion 51d and the second engagement portion. It is conceivable that 55 contacts. In this case, the tip end of the upper cam portion 51d is inclined upward toward the engagement position side, so that the first engagement portion 51 is engaged with the second engagement portion 55 and the upper cam portion 51d. Swing in the side direction (the direction of the arrow "CCW"). As a result, the engagement state between the second engagement portion 55 and the first engagement portion 51 is maintained.

As described above, the first engagement portion 51, the support shaft portion 56, and the disengagement operation tool 57 are configured to be integrally swingable around the lateral axis X. When the canopy 40 is switched from the work position to the auxiliary work position, the occupant swings the disengagement operation tool 57 in the downward direction (clockwise direction in FIGS. 9 to 11) to move the engagement disengagement operation tool 57, as shown in FIGS. When viewed from the side, the first engaging portion 51 swings in the direction toward the retracted position (the direction of arrow "CW"). Therefore, the opening of the concave portion 54a is opened, and the canopy 40 swings upward as shown in FIGS. 3 and 5 by the biasing force of the air damper 40G.

[Structure of hood]
An example of the structure of the hood 43 of the canopy 40 will be described with reference to FIG. FIG. 12 shows a bottom view of the canopy 40 covered with the hood 43 (when viewed from above the passenger seat 26 in FIG. 1). As described above, the outer frame of the canopy 40 is formed by the outer frame 40A. The hood 43 covers the outer frame of the canopy 40 from above, and the outer peripheral end of the hood 43 is wound around the outer frame 40A. Then, the outer peripheral end portion of the hood 43 is locked to the lower surface of the hood 43 while being wound inside the outer frame of the canopy 40.

The method of locking the outer peripheral end of the top 43 may be a method using a surface fastener, a method using a snap button, or the like. In the example shown in FIG. 12, the outer peripheral edge of the hood 43 is provided with a first locking portion 43A by a surface fastener at the outer peripheral edge in the front region of the machine body, and a second magnetic lock is provided at the outer peripheral edge of the rear part of the body. A locking portion 43B is provided. That is, the first locking portion 43A can be bonded to the lower surface of the hood 43 inside the outer frame 40A by a surface fastener, and the second locking portion 43B is wound by the magnet on the hood 43. The inner surfaces can be adsorbed together. Alternatively, the outer surface or the lower surface of the rear portion of the outer frame 40A may be provided with a substance that reacts to a magnetic force, and the second locking portion 43B may be wound around the outer surface or the lower surface of the outer frame 40A to be attracted. good.

In the embodiment illustrated in FIG. 12, the attraction force of the magnet of the second locking portion 43B is set to be weaker than the adhesive force of the surface fastener of the first locking portion 43A. That is, for example, when the canopy 40 is swirled by the wind and the hood 43 receives wind pressure, the second locking portion 43B is configured so that the magnets are easily attracted to the second locking portion 43B. Therefore, when the canopy 40 is swung by the wind, the outer peripheral end of the hood 43 is unwound around the outer frame in the rear region of the canopy 40, and the rear region of the hood 43 is blown by the wind. Further, since the surface fastener of the first locking portion 43A firmly holds the wound state with respect to the outer frame of the canopy 40 at the front part of the machine body, the hood 43 is prevented from being blown by the wind. That is, in the embodiment shown in FIG. 12, the area in which the wind pressure is applied to the hood 43 is reduced only to the front portion of the hood 43 due to the structure in which only the rear region of the hood 43 is blown by the wind. For this reason, it is possible to prevent the frame of the canopy 40 from being damaged and the farm work machine from being disturbed by the wind to hinder the steering operation.

In addition, in the embodiment illustrated in FIG. 12, only the portions of the second locking portion 43B corresponding to the pair of left and right corners in the rear portion of the outer frame 40A are configured to be bonded by a surface fastener. Is also good. In this case, the adhesive force of the surface fastener at the second locking portion 43B may be weaker than the adhesive force of the surface fastener at the first locking portion 43A. The adhesive force of the surface fastener at the second locking portion 43B may be stronger than the attraction force of the magnet. With this configuration, it is possible to reduce the risk of frequent attraction of the magnet at the second locking portion 43B even if the canopy 40 is swung by a weak wind, and the canopy 40 is swung by a wind having a predetermined strength or more. In this case, a configuration in which the rear region of the hood 43 is blown by the wind can be realized.

[Another embodiment]
The present invention is not limited to the configurations illustrated in the above-described embodiments, and representative representative embodiments of the present invention will be illustrated below.

(1) In the above-described embodiment, the first support portion is provided in the front portion of the traveling machine body C and the second support portion is provided in the rear portion of the traveling machine body C, but the present invention is not limited to this embodiment. For example, the satellite positioning unit 34 may be located at the rear of the traveling body C. In this case, the first support part may be provided at the rear part of the traveling machine body C and the second support part may be provided at the front part of the traveling machine body C. Further, the first support portion may be provided on one of the left and right sides of the traveling machine body C, and the second support portion may be provided on the other side of the traveling machine body C. That is, it is sufficient that the first support portion is erected in the region on the one end side of the traveling machine body C and the second support portion is erected in the region on the other end side of the traveling machine body C.

(2) In the above-described embodiment, the pair of left and right front frames 32, 32 and the connecting portion 33 constitute the first support portion, but the present invention is not limited to this embodiment. Further, in the above-described embodiment, the second support portion is configured by the pair of left and right rear frames 42, 42, but the present invention is not limited to this embodiment. For example, the front frame 32 does not have to have a left-right paired configuration, and may not have the connecting portion 33. Further, the rear frame 42 does not have to have a left-right paired configuration. That is, the first support portion and the second support portion do not have to have a pair of left and right configurations.

(3) In the above-described embodiment, the canopy 40 is configured to be switchable between two positions, a work position and an auxiliary work position, but the present invention is not limited to this embodiment. For example, a plurality of steps may be provided between the swinging ranges of the work position and the auxiliary work position, and the height may be adjusted for each step.

(4) In the above-described embodiment, the air damper 40G is shown as the urging mechanism, but other than the air damper 40G, for example, a coil spring or a torsion spring may be used. Further, the urging mechanism in the present invention may be configured to urge the canopy 40 to swing downward. Further, the urging mechanism exemplified by the air damper 40G may be provided in a part of the up-and-down lifting mechanism 5.

(5) In the above-described embodiment, the grip 40F is fixed to the lower portion of the rear lateral frame 40D, but the invention is not limited to this embodiment. For example, the grip portion 40F may be a string-shaped member that is bundled and hung on the outer frame 40A and the rear horizontal frame 40D. That is, the grip portion 40F may be provided in the lower portion of the canopy 40 on the side where the vertical lifting mechanism 5 is located.

(6) Although the first swing link 52A and the second swing link 52B are shown as the swing link members in the above-described embodiment, the present invention is not limited to this embodiment. For example, a diamond-shaped pantograph mechanism may be used as the swing link member. In addition to the first swing link 52A and the second swing link 52B, for example, an expandable and contractible damper may be used, and this damper may be used as an actuator instead of the air damper 40G.

(7) In the embodiment described above, the first engaging portion 51 is provided in the engaging recessed portion 54 of the canopy 40, and the second engaging portion 55 is provided in the rear frame 42 as the second supporting portion. However, the present invention is not limited to this embodiment. For example, the second engagement portion 55 may be provided in the engagement recessed portion 54 of the canopy 40, and the first engagement portion 51 may be provided in the rear frame 42. That is, the first engagement portion 51 may be provided on one of the canopy 40 and the second support portion, and the second engagement portion 55 may be provided on the other of the canopy 40 and the second support portion.

(8) The canopy 40 is not limited to the above-described embodiment, and may be formed in a step shape in a side view as shown in FIG. 13. A canopy 40 shown in FIG. 13 has a step portion 45 formed over a portion corresponding to the boarding seat 26 and a rear end portion corresponding to the seedling placing table 22, and the step portion 45 has a vertical height. It is formed higher than the vertical height of the front portion of 40. As a result, when the passenger stands up from the passenger seat 26 and replenishes the mat-shaped seedlings to the seedling placing table 22, the working space for the passengers can be secured without the vertical lifting mechanism 5 and the air damper 40G. It is easy to be beaten.

(9) The present invention is not limited to the above-described embodiment, and the side cover may be provided along the outer periphery of the canopy 40 in plan view. For example, the side cover may be configured to be able to shield most of rain and sunlight with respect to the riding section 25 by extending below the outer frame 40A.

(10) In the above-described embodiment, the first engagement portion 51 and the second engagement portion 55 are configured to be engageable with each other when the canopy 40 is in the working position, but the present embodiment is limited to this embodiment. Not done. For example, the first engagement portion 51 and the second engagement portion 55 may be configured to be engageable with each other when the canopy 40 is in the auxiliary work position. That is, even when the canopy 40 moves to the auxiliary work position side and the first engagement portion 51 and the second engagement portion 55 interfere with each other, the canopy 40 simply moves to the auxiliary work position side as it is. The first engaging portion 51 may be switched to the retracted position side.

(11) In the above-described embodiment, the seedling planting device W is shown as a working device, but the working device may be a seeding device, a fertilizer applying device, or a spraying device for a chemical solution or the like. You can have it.

(12) The present invention is also applicable to rice transplanters, seeders, riding management machines, vegetable harvesters, and the like.

Note that the configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in other embodiments as long as no contradiction occurs. Further, the embodiments disclosed in the present specification are exemplifications, and the embodiments of the present invention are not limited thereto, and can be appropriately modified within a range not departing from the object of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be applied to a field working machine having a canopy that covers a riding section.

25: Boarding section 32: Front frame (first support section)
33: Connection part (first support part)
34: Satellite positioning unit 40: Canopy 40F: Gripping part 40G: Air damper (biasing mechanism)
42: Rear frame (second support portion)
5: Vertical lifting mechanism 51: First engaging portion 55: Second engaging portion 52A: First swing link (swing link member)
52B: Second swing link (swing link member)
C: Traveling machine W: Seedling planting device (working device)

Claims (6)

A traveling aircraft capable of traveling in the field,
A work device capable of working on a field,
A riding section provided on the traveling body over the lateral width of the traveling body,
A first support portion that is erected in a region on one end side of the traveling machine body,
A second support portion which is erected in the region on the other end side of the traveling machine body,
A satellite positioning unit that is supported by the first support part and is capable of detecting the position of the traveling body using a navigation satellite;
A canopy that is swingably supported by the first support portion and is supported by the second support portion to cover the riding portion from above,
And a vertically elevating mechanism that is provided at the upper end of the second support part and is capable of vertically elevating the canopy,
The canopy has a working position in which the height of the end on the side where the second support is located is lower than the upper end of the satellite positioning unit, and a side on which the second support is located at an inclination relative to the working position. A field work machine capable of switching the vertical height to an auxiliary work position in which the height of the end of the is higher than the upper end of the satellite positioning unit. The working device is provided behind the traveling body,
The field working machine according to claim 1, wherein the second support portion is provided on a side of the traveling machine body on which the working device is located with respect to the first support portion. The field work machine according to claim 1 or 2, further comprising a biasing mechanism that is supported by the first support portion and biases the canopy so as to swing upward. 4. The field work machine according to claim 1, wherein a gripping portion capable of vertically moving up and down the canopy is provided in a lower portion of the canopy on a side where the vertically moving mechanism is located. 5. The up-and-down lifting mechanism is provided with a swinging link member whose end portions are connected to each other and which can be folded in a vertically overlapping state and which is vertically expandable and contractible. Farm working machine. A first engaging portion provided on one of the canopy and the second supporting portion, and a first engaging portion provided on the other of the canopy and the second supporting portion in the vertical lifting mechanism. And a second engaging portion that is engageable,
The first engaging portion is configured to be switchable between an engaging position capable of engaging with the second engaging portion and a retracted position not engaging with the second engaging portion,
When the canopy swings toward the working position and the pressing force of the second engaging portion acts on the first engaging portion, the first engaging portion is switched to the retracted position side. The field work machine according to any one of claims 1 to 5, which is configured as described above.

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