JP7058619B2 - Field work machine - Google Patents

Description

The present invention relates to a field work machine provided with a traveling machine capable of traveling in a field, a boarding section provided on the traveling machine, and a canopy covering the boarding section from above.

For example, Patent Document 1 discloses a paddy field work machine as an example of a field work machine, and the paddy field work machine is provided with a canopy (“roof” in the document) that covers the upper part of a boarding section (the area of the “driver's seat” in the document). Has been done. This canopy is supported by a front support (“support frame” in the literature) that extends upward from the front of the fuselage.

Japanese Unexamined Patent Publication No. 2016-67259

By the way, the canopy disclosed in Patent Document 1 is configured so that the tilted posture of the canopy with respect to the front support portion can be changed, but it is necessary for a worker or an assistant to support the canopy by hand when the tilted posture is changed. There is. Therefore, it is desirable that the canopy has a simpler configuration than the canopy disclosed in Patent Document 1 and the vertical height can be changed.

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

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

The field work machine according to the present invention includes a traveling machine capable of traveling in the field, a working device capable of working on the field, a boarding portion provided on the traveling machine over the width of the traveling machine, and the traveling machine. The first support portion erected in the area on one end side of the vehicle, the second support portion erected in the region on the other end side of the traveling aircraft, and the navigation supported by the first support portion. A satellite positioning unit that can detect the position of the traveling aircraft using a satellite, and a canopy that is swingably supported by the first support portion and supported by the second support portion to cover the boarding portion from above. The canopy is provided with a vertical elevating mechanism provided at the upper end of the second support portion and capable of raising and lowering the canopy up and down. A work position lower than the upper end of the satellite positioning unit, and an auxiliary work position in which the height of the end portion inclined from the work position on the side where the second support is located is higher than the upper end of the satellite positioning unit. The feature is that the vertical height can be switched to.

According to the present invention, the canopy is supported by the first support portion and is supported by the second support portion. Therefore, even when the canopy is blown by the wind, the support structure of the canopy becomes stronger as compared with the configuration in which the canopy is cantilevered. Further, in a state where the canopy is swingably supported by the first support portion, the canopy is configured to be vertically liftable by the vertical lift mechanism in the second support portion. That is, since one end of the canopy is firmly supported by the first support portion, the operator or an assistant can easily move the canopy up and down. Further, the first support portion is also used for the support structure as the swing fulcrum of the canopy and the support structure of the satellite positioning unit. With this configuration, the free end of the canopy is separated from the satellite positioning unit, so that the canopy can be raised even if the height of the end of the canopy on the side where the second support 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 work machine having a canopy that is firmly supported by the 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 behind the traveling machine body, and the second support portion is provided on the side of the traveling machine body on the side where the working device is located with respect to the first support portion. Is.

According to this configuration, the second support is located closer to the work device than the first support with the vertical lift mechanism provided on the second support, so the canopy is higher on the side where the work device is located. A tilted configuration is possible. That is, since the vertical height of the canopy becomes higher toward the side where the work device is located, a sufficient work space for the occupant is secured when the worker in the boarding section works toward the side where the work device is located. It will be easier.

In the present invention, it is preferable that the canopy is provided with an urging mechanism that is supported by the first support portion and urges the canopy to swing upward.

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 by the urging mechanism, so that the operator can switch the vertical height of the canopy more easily. be able to.

In the present invention, it is preferable that a grip portion capable of raising and lowering the canopy is provided at the lower portion of the canopy on the side where the up and down 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 swing link member whose ends are connected to each other so that they can be folded up and down and can be expanded and contracted up and down.

With this configuration, the canopy swings even when the vertical height of the canopy is switched from the work position to the auxiliary work position by interposing the swing link member between the canopy and the second support portion. It is supported by the second support portion via the dynamic 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 expanded and contracted up and down is realized with a simple structure.

In the present invention, the vertical elevating mechanism is provided with a first engaging portion provided on one of the canopy and the second support portion, and the first engaging portion provided on the other of the canopy and the second support portion. A second engaging portion that can be engaged with the engaging portion is provided, and the first engaging portion engages with the engaging position that can be engaged with the second engaging portion and the second engaging portion. When the canopy swings in the direction of the working position and the pressing force of the second engaging portion acts on the first engaging portion, the canopy is configured to be switchable over a retracted position that does not match. It is preferable that the first engaging portion is configured to be switched to the retracted position side.

With this configuration, even if the canopy operates to the work position side or the auxiliary work position side and the first engaging part and the second engaging part interfere with each other, the canopy remains on the work position side or the auxiliary work position. The first engaging portion is switched to the retracted position side only by operating to the working position side. As a result, when the passenger switches the vertical height of the canopy, it is not necessary to switch the first engaging portion to the retracted position in advance, which reduces the trouble for the passenger.

It is a left side view of the machine which shows the riding type rice transplanter as a field work machine. It is a top view which shows the riding type rice transplanter as a field work machine. It is a left side view of the machine which shows the passenger-type rice transplanter when the canopy is an auxiliary work position. It is a left side view of the machine body which shows the canopy of a work position. It is a left side view of the machine body which shows the canopy of the auxiliary work position. It is a left side view of the machine body which shows the up-and-down elevating mechanism in the canopy of a work position. It is the left side view of the machine | body which shows the vertical elevating mechanism in the canopy of the auxiliary work position. It is a partial rear view which shows the grip part of a canopy and its periphery. It is a left side view of the machine body which shows the up-and-down elevating mechanism when switching from an auxiliary work position to a work position. It is a left side view of the machine body which shows the up-and-down elevating mechanism when switching from an auxiliary work position to a work position. It is a left side view of the machine body which shows the up-and-down elevating mechanism when switching from an auxiliary work position to a work position. It is a bottom view which shows an example of the structure of the hood part in a canopy. It is a left side view of the airframe which shows another embodiment of a canopy.

[Basic configuration of field work machine]
An embodiment of the present invention will be described with reference to the drawings. Here, a passenger-type rice transplanter will be described as an example of a field work machine. In FIG. 2, the arrow "F" is the front direction of the traveling machine C, the arrow "B" is the rear direction of the traveling machine C, the arrow "L" is the left direction of the traveling machine C, and the arrow "R" is. It is to the right of the traveling aircraft C.

As shown in FIGS. 1 to 3, the passenger-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 can travel in a field. Aircraft C is provided. Further, the seedling planting device W as a working device is supported and connected to the rear portion of the traveling machine C so that the seedling planting device W can move up and down, and the seedling planting device W is configured to enable seedling transplanting work to the field. The pair of left and right steering wheels 10 are provided at the front portion of the traveling machine C so that the direction of the traveling machine C can be changed and operated, and the pair of left and right rear wheels 11 are provided at the rear portion of the traveling machine C. Has been done. 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 moves up and down by the expansion and contraction of the lifting hydraulic cylinder 16.

The front portion of the traveling machine body C is provided with an engine 13 as a driving unit capable of driving the traveling machine body C to travel, and an openable / closable bonnet 12. The bonnet 12 has an inclined surface that inclines backward and is configured to accommodate the engine 13. Although not described in detail, the steering wheel 10 and / or the rear wheel 11 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 steering wheels 10 and the rear wheels 11 via the transmission mechanism provided in the machine, and the power after the shift is planted via 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 in the front-rear direction, and a support support column frame 15 is erected at the front portion of the machine body frame 14.

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

The seedling planting device W drives each rotary case 19 to rotate by the power transmitted from the transmission case 18 while driving the seedling stand 22 back and forth laterally, and planting each from the lower part of the seedling stand 22. Seedlings are alternately taken out by the arm 20 and planted on the surface of the field. Although not shown, the seedling planting device W is configured to plant seedlings by a planting arm 20 provided in a 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 retracted posture. In the state of the working posture, the marker device 23 touches the field surface of the field as the traveling machine C travels, and forms an index line (not shown) on the field surface corresponding to the next work process. In the retracted position, the marker device 23 moves upward from the field surface of the field. The attitude 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.

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

A foldable first preliminary seedling mounting table 31 having rails is provided on the left and right outside of the bonnet 12 in the traveling machine C. The first spare seedling loading table 31 is configured so that spare seedlings for replenishing 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 outside of the bonnet 12 in 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 spare seedling stand 31 is supported by the front frame 32.

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 laid horizontally so as to be able to swing up and down over each of the pair of left and right hinges 33A, 33A. The connecting portion 33 is configured to be able to swing up and down around the axis in the lateral direction of the machine body via a pair of hinges 33A and 33A. The connecting portion 33 is configured so that it can be switched between a state in which the connecting portion 33 extends upward from the upper end portion of the front frame 32 and a state in which the connecting portion 33 extends downward from the upper end portion of the front frame 32.

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

[About the configuration of the canopy]
As shown in FIGS. 1 to 3, a canopy 40 is provided above the boarding section 25. A pair of swinging pivots 41, 41 are swingably connected to two places on the left and right in the front part of the canopy 40. A pair of swinging pivots 41, 41 are fitted on the left and right ends of the upper part of the connecting portion 33. As a result, the canopy 40 is configured to be able to swing around the pair of swing pivots 41, 41. In the present embodiment, the "first support portion" of the present invention is configured by the pair of left and right front frames 32, 32 and the connecting portion 33, and the region on one end side of the canopy 40 becomes the first support portion. It is supported. The connecting portion 33 is also used as a support structure as a swing fulcrum of the canopy 40 and a support structure of the satellite positioning unit 34.

A pair of rear frames 42, 42 as the "second support portion" in 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 on the lateral side of the aircraft with respect to the boarding / alighting step 35 in the lateral direction of the aircraft. The pair of left and right rear frames 42, 42 are located behind the machine body from the boarding / alighting step 35 and inside the machine body from the left and right ends of the seedling planting device W as a working device. As a result, the canopy 40 can cover the boarding section 25 from above while being firmly supported from the rear portion of the boarding section 25 (or behind the boarding section 25). Further, the pair of left and right rear frames 42, 42 are located inside the machine body from the left and right ends of the seedling planting device W. Therefore, the possibility that the rear frames 42, 42 come into contact with obstacles in the field is reduced as compared with the configuration in which the rear frames 42, 42 are located outside the machine body from the left and right ends of the seedling planting device W. ..

A pair of engaging recesses 54, 54 (see FIGS. 4 to 7) are connected to each of the left and right end portions in the region near the rear of the canopy 40 as one configuration of the vertical elevating mechanism 5, and the engaging in the canopy 40. The portion 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, the same applies hereinafter) and the second support portion (a pair of left and right rear frames 42, 42, the same applies hereinafter) to cover the boarding 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 on the side of the traveling machine body C where the seedling planting device W is located rather than the first support portion. It is provided in.

As shown in FIGS. 1, 3 to 5, and 12, the canopy 40 includes an outer frame 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 a resin such as polyvinyl chloride.

The outer frame frame 40A is configured by combining a plurality of pipe frames. Each of the front horizontal frame 40B, the intermediate horizontal frame 40C, and the rear horizontal frame 40D is a rod-shaped member extending in the lateral direction of the machine body inside the outer frame frame 40A. Both ends of the front horizontal frame 40B, the intermediate horizontal frame 40C, and the rear horizontal frame 40D are connected to the left and right side portions of the outer frame frame 40A. The front-rear frame 40E is a rod-shaped member extending in the front-rear direction. Both ends of the front and rear frames 40E are connected to the front horizontal frame 40B and the intermediate horizontal frame 40C, respectively.

The grip portion 40F is fixed to the lower part of the canopy 40 on the side where the vertical elevating mechanism 5 is located, that is, the lower part of the rear lateral frame 40D. The grip portion 40F is configured so that the passenger seated in the boarding seat 26 can stand up and grip the grip portion 40F to raise and lower the canopy 40 up and down. The grip portion 40F is located between the boarding seat 26 and the front end of the seedling stand 22 in a side view. The grip portion 40F extends laterally along the longitudinal direction of the rear lateral frame 40D. Therefore, the passenger standing up from the boarding seat 26 can operate the grip portion 40F from the left side or the right side of the boarding seat 26.

Then, inside the outer frame frame 40A, the flexible hood 43 is covered from above, so that the canopy 40 covers the boarding portion 25. The hood 43 covers the boarding portion 25 from above the outer frame frame 40A, the front horizontal frame 40B, the intermediate horizontal frame 40C, the rear horizontal frame 40D, and the front / rear frame 40E. Although the hood 43 is not shown in FIGS. 6 to 11, the hood 43 actually exists in these figures as well.

The front end portion of the canopy 40 is located in front of the upper end portion of the inclined surface of the bonnet 12. Therefore, even if rainwater drips from the front end of the canopy 40, the rainwater falls on the bonnet 12 and slides forward along the inclined surface. Therefore, the possibility that rainwater will drip onto the steering handle 27 in the boarding section 25 and various meter devices on the front side of the steering handle 27 is reduced.

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

As shown in FIGS. 1, 3 to 5, an air damper 40G that can be expanded and contracted is provided over the swing pivot portion 41 and the front lateral frame 40B, and the air damper 40G extends along the longitudinal direction. Is being urged to. Therefore, the canopy 40 is urged to swing upward by the air damper 40G. That is, the air damper 40G as the urging mechanism is supported by the first support portion and urges the canopy 40 so as to swing upward.

The height of the canopy 40 is configured to be switchable in two stages. In the embodiments shown in FIGS. 1 and 4, the canopy 40 is horizontal or substantially horizontal in the anteroposterior direction. The vertical height of the upper end of the canopy 40 at this time is lower than that of the upper end of the satellite positioning unit 34. In this embodiment, this position is referred to as a "working position". As shown in FIG. 4, if there are no obstacles or the like in the region above the interference line L inclined by the ground angle α, the positioning accuracy of the satellite positioning unit 34 is sufficiently ensured. That is, since the canopy 40 at the working position is located in the region below the interference line L, the canopy 40 does not affect the positioning accuracy of the satellite positioning unit 34.

In the embodiments shown in FIGS. 3 and 5, the canopy 40 tilts backward toward the rear side. The vertical height of the upper end portion of the canopy 40 at this time is located higher than the upper end portion of the satellite positioning unit 34. As a result, when the occupant stands up from the boarding seat 26 and replenishes the mat-shaped seedlings to the seedling pedestal 22, it is easy to secure the occupant's work space. In this embodiment, this position is referred to as an "auxiliary work position". As shown in FIG. 5, since the canopy 40 at the auxiliary work position has a portion located in the 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 portion 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 has a working position where 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 position of the second support portion is inclined from the working position. The height of the end portion on the side is configured to be higher than the upper end portion of the satellite positioning unit 34 as an auxiliary work position, and the vertical height can be switched to.

[About the canopy up / down mechanism]
As shown in FIGS. 4 to 7, a pair of left and right vertical elevating mechanisms 5 and 5 are provided over the upper end portions of the pair of left and right rear frames 42 and 42 and the left and right side portions of the rear portion of the canopy 40. , Each of the vertical elevating mechanisms 5 and 5 supports the rear part of the canopy 40 so as to be able to elevate. In other words, the vertical elevating mechanism 5 is provided at the upper end of the second support portion and is configured to be able to vertically elevate the canopy 40. The vertical elevating mechanism 5 includes an upper end support portion 50, a first engaging portion 51, a first swing link 52A and a second swing link 52B as "swing link members" in the present invention, and an engagement recessed portion. It has 54 and a second engaging portion 55. Further, as shown in FIGS. 6 to 8, the vertical elevating mechanism 5 has a support shaft portion 56 and an engagement disengagement operating 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 that can be engaged with the first engaging portion 51 is connected to the front portion of the upper end support portion 50. One end of the first swing link 52A is swingably connected to the rear portion of the upper end support portion 50 around the first shaft core P1 via the first series of connecting pins 52E. The other end of the first swing link 52A is connected to the second swing link 52B. The ends of the first swing link 52A and the second swing link 52B are swingably connected to each other around the second shaft core P2 via the second connecting pin 52F. Further, the end portion of the second swing link 52B on the side opposite to the position of the second connecting pin 52F swings around the third shaft core P3 via the rear portion of the engaging recess 54 and the third connecting pin 52G. It is movably connected. In the longitudinal direction of the first swing link 52A, the end portion on the side opposite to the side where the first shaft core P1 is located is bent upward in the machine body.

The pair of left and right engaging recesses 54, 54 are fixed to the portions corresponding to the upper end support portions 50 in the lower portions of the left and right side portions of the outer frame frame 40A, respectively. That is, the engaging recess 54 is connected downward to the canopy 40. As shown in FIGS. 9 to 11, a recess 54a is formed in the engaging 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 engaging portion 55 enters the recess 54a of the engaging recess 54 as shown in FIGS. 4, 6 and 11. Then, by hooking the first engaging portion 51 to the second engaging portion 55, the vertical elevating 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 each 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 engaging recess 54 is in a state of swinging upward with the canopy 40 together with the work position. In this case, the first swing link 52A inclines backward from the first shaft core P1, and the second swing link 52B inclines forward from the second shaft core P2. In other words, the second swing link 52B inclines backward and downward when viewed from the third shaft core P3. As described above, the first oscillating link 52A and the second oscillating link 52B as the oscillating link member are configured so that the ends thereof are connected to each other and can be folded in a vertically overlapping state and can be expanded and contracted up and down. ing.

The first locking surface 52c is formed at a position below the second shaft core P2 in the first swing link 52A, and a second position on the rear side of the machine body than the second shaft core P2 at the second swing link 52B. Two locking surfaces 52d are formed. When the first swing link 52A and the second swing link 52B each swing upward, the first locking surface 52c and the second locking surface 52d come to a point where the canopy 40 reaches the auxiliary work position. Contact each other. Therefore, the first swing link 52A and the second swing link 52B cannot swing upward from the contact portion. From this, 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 urged to swing upward by the air damper 40G, if the force that swings downward does not act on the canopy 40, the first locking surface The 52c and the second locking surface 52d are held in contact with each other. As a result, the canopy 40 is held in the auxiliary working position.

As shown in FIGS. 6 to 8, the first engaging portion 51 is connected to the support shaft portion 56, and the first engaging portion can be integrally rotated around the support shaft portion 56 and the lateral shaft core 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 engaging 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 so as to be symmetrical to each of the pair of left and right vertical elevating mechanisms 5 and 5, and the pair of left and right support shaft portions 56 and 56 are along the lateral axis X. It is provided. Then, the pair of left and right support shaft portions 56, 56 are connected by the disengagement operating tool 57, and the disengaging operating tool 57 is displaced backward from the lateral axis X.

As shown in FIGS. 9 to 11, a hooking portion 51A is provided at the free end portion of the first engaging portion 51. 9 and 11 show a state in which the hooking portion 51A closes the opening in the lower portion of the recess 54a. This position is the "engagement position" of the first engaging 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 engaging portion 51. The canopy 40 is held at the working position by the first engaging portion 51 being positioned at the engaging position with the second engaging portion 55 inserted into the recess 54a of the engaging recess 54. As a result, the first engaging portion 51 is configured to be switchable between an engaging position that can be engaged with the second engaging portion 55 and a retracted position that does not engage with the second engaging portion 55. Has been done.

The lower cam portion 51c is formed at the lower part of the hooking portion 51A, and the upper cam portion 51d is formed at the upper part of the hooking portion 51A. The lower cam portion 51c, the upper cam portion 51d, and the second engaging portion 55 are configured to be in contact with each other. The lower cam portion 51c is inclined upward toward the engagement position side in the side view in FIGS. 9 to 11. Further, the tip portion of the upper cam portion 51d is also inclined 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 engaging portion 55 and the engaging recess 54 are engaged with 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 further pulls the grip portion 40F downward (in the direction of the arrow “DW”), the pressing force of the second engaging 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 engaging portion 55 is the force in the upward direction of the machine (direction opposite to the arrow "DW") and the first engaging portion. It is distributed to the force in the direction toward the retracted position (direction of the arrow “CW”) in 51. As a result, as shown in FIG. 10, the first engaging portion 51 is moved toward the retracted position side (direction of the arrow “CW”) with the second engaging portion 55 and the lower cam portion 51c slipping. It swings and the second engaging portion 55 enters the recess 54a.

In this way, when the canopy 40 swings in the direction of 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 is switched to the retracted position side. It is configured to be.

Then, as shown in FIG. 11, the first engaging portion 51 swings in the direction toward the engaging position side (direction of the arrow “CCW”), and the hooking portion 51A closes the opening of the recess 54a. , The second engaging portion 55 and the first engaging portion 51 are in an engaged state, and the vertical swing of the canopy 40 is restricted. The first engaging portion 51 may be configured to swing in the direction toward the engaging position (direction of the arrow “CCW”) by providing an urging mechanism such as a coil spring or a torsion spring. .. Further, as a configuration in which the first engaging portion 51 swings in the direction toward the engaging position side (direction of the arrow “CCW”), a cam that can abut from above with respect to the second engaging portion 55 is, for example, the first. It may be formed at the position of reference numeral 51B in one engaging portion 51. Then, the first engaging portion 51 may swing toward the engaging position side with the slip of the cam and the second engaging portion 55.

In the engaged state between the second engaging portion 55 and the first engaging portion 51, a force that swings upward acts on the canopy 40 to act on the engaging position side of the upper cam portion 51d and the second engaging portion. It is conceivable that the 55 may come into contact with the 55. In this case, since the tip of the upper cam portion 51d is inclined upward toward the engaging position side, the first engaging portion 51 is in the engaging position with slippage between the second engaging portion 55 and the upper cam portion 51d. It swings in the direction of the side (direction of the arrow "CCW"). As a result, the engaged state between the second engaging portion 55 and the first engaging portion 51 is maintained.

As described above, the first engaging portion 51, the support shaft portion 56, and the disengaging operating tool 57 are configured to be integrally swingable around the lateral axis X. When switching the canopy 40 from the work position to the auxiliary work position, the passenger swings the disengagement operating tool 57 downward (clockwise in FIGS. 9 to 11), whereby FIGS. 9 to 11 and 11. The first engaging portion 51 swings in the direction toward the retracted position (direction of the arrow “CW”) in the side view of the above. Therefore, the opening of the recess 54a is opened, and the canopy 40 swings upward due to the urging force of the air damper 40G, as shown in FIGS. 3 and 5.

[Structure of hood]
An example of the configuration of the hood 43 in 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 (a view when viewed upward from the boarding seat 26 in FIG. 1). As described above, the outer frame of the canopy 40 is formed by the outer frame 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 frame 40A. Then, the outer peripheral end portion of the hood 43 is locked to the lower surface of the hood 43 in a state of being wound inside the outer frame of the canopy 40.

As a method of locking the outer peripheral end portion of the hood 43, a surface fastener, a snap button, or the like can be considered. In the example shown in FIG. 12, of the outer peripheral end portions of the hood 43, the first locking portion 43A by the surface fastener is provided at the outer peripheral end portion of the front region of the machine body, and the second outer peripheral end portion by the magnet is provided at the outer peripheral end portion of the rear part of the machine body. A locking portion 43B is provided. That is, the first locking portion 43A can be adhered to the lower surface in the region inside the outer frame frame 40A of the hood 43 by the hook-and-loop fastener, and the second locking portion 43B is wound around the hood 43 by the magnet. It is possible to adsorb between the inner surfaces. Alternatively, even if a substance that reacts to a magnetic force is provided on the outer surface or the lower surface of the rear portion of the outer frame frame 40A, and the second locking portion 43B is wound around the outer surface or the lower surface of the outer frame frame 40A and is adsorbed. good.

In the embodiment illustrated in FIG. 12, the attractive force of the second locking portion 43B by the magnet is set to be weaker than the adhesive force of the first locking portion 43A by the hook-and-loop fastener. That is, for example, when the canopy 40 is blown by the wind and the hood 43 is subjected to wind pressure, the second locking portion 43B is configured so that the attraction of the magnet in the second locking portion 43B can be easily disengaged. Therefore, when the canopy 40 is blown by the wind, the winding of the outer peripheral end portion of the hood 43 with respect to the outer frame in the rear region of the canopy 40 is released, and the rear region of the hood 43 is swept by the wind. Further, since the hook-and-loop fastener of the first locking portion 43A firmly holds the wound state with respect to the outer frame in the front portion of the canopy 40, the possibility that the hood 43 is blown by the wind is prevented. That is, in the embodiment shown in FIG. 12, the area of the hood 43 that receives wind pressure is reduced only to the front portion of the hood 43 due to the configuration in which only the rear region of the hood 43 is blown by the wind. Therefore, it is possible to prevent the frame of the canopy 40 from being damaged or the field work machine being blown by the wind and hindering the steering operation.

Further, in the embodiment illustrated in FIG. 12, only the portion of the second locking portion 43B corresponding to the pair of left and right corner portions in the rear portion of the outer frame frame 40A can be bonded by the hook-and-loop fastener. Is also good. In this case, the adhesive force of the hook-and-loop fastener at the second locking portion 43B may be weaker than the adhesive force of the hook-and-loop fastener at the first locking portion 43A. Further, the adhesive force of the hook-and-loop fastener in the second locking portion 43B may be stronger than the attractive force of the magnet. With this configuration, the possibility that the magnets in the second locking portion 43B are frequently disengaged just by being fanned by a weak wind is reduced, and the canopy 40 is fanned by a wind having a predetermined strength or more. In this case, it is possible to realize a configuration in which the rear region of the hood 43 is swept by the wind.

[Another Embodiment]
The present invention is not limited to the configuration exemplified in the above-described embodiment, and the following will exemplify another typical embodiment of the present invention.

(1) In the above-described embodiment, the first support portion is provided at the front portion of the traveling machine body C, and the second support portion is provided at 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 configured to be located at the rear of the traveling machine C. In this case, the first support portion may be provided at the rear portion of the traveling machine body C, and the second supporting portion may be provided at the front portion 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 left and right other side of the traveling machine body C. That is, the first support portion may be erected in the region on one end side of the traveling machine body C, and the second support portion may be erected in the region on the other end side of the traveling machine body C.

(2) In the above-described embodiment, the first support portion is configured by the pair of left and right front frames 32, 32 and the connecting portion 33, 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 pair of left and right configurations, and may have a configuration in which the connecting portion 33 is not provided. Further, the rear frame 42 does not have to have a pair of left and right configurations. 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 a work position and an auxiliary work position, but is not limited to this embodiment. For example, a plurality of steps may be provided between the swing range between the work position and the auxiliary work position, and the height may be adjusted for each step.

(4) Although the air damper 40G is shown as the urging mechanism in the above-described embodiment, for example, a coil spring, a torsion spring, or the like may be used in addition to the air damper 40G. Further, the urging mechanism in the present invention may have a configuration in which the canopy 40 is urged so as to swing downward. Further, the urging mechanism exemplified by the air damper 40G may be provided in a part of the vertical elevating mechanism 5.

(5) In the above-described embodiment, the grip portion 40F is fixed to the lower part of the rear lateral frame 40D, but the present invention is not limited to this embodiment. For example, the grip portion 40F may be a string-shaped member that is bound and suspended from the outer frame frame 40A or the rear horizontal frame 40D. That is, the grip portion 40F may be configured to be provided at the lower portion of the canopy 40 on the side where the vertical elevating mechanism 5 is located.

(6) Although the first oscillating link 52A and the second oscillating link 52B are shown as the oscillating link member 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. Further, in addition to the first swing link 52A and the second swing link 52B, for example, a stretchable damper may be used, and this damper may be used as an actuator instead of the air damper 40G.

(7) In the above-described embodiment, the first engaging portion 51 is provided in the engaging recess 54 of the canopy 40, and the second engaging portion 55 is provided in the rear frame 42 as the second support portion. , Not limited to this embodiment. For example, the second engaging portion 55 may be provided in the engaging recess 54 of the canopy 40, and the first engaging portion 51 may be provided in the rear frame 42. That is, the first engaging portion 51 may be provided on one of the canopy 40 and the second support portion, and the second engaging 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 stepped shape in a side view as shown in FIG. In the canopy 40 shown in FIG. 13, a step portion 45 is formed over a portion corresponding to the boarding seat 26 and a rear end portion corresponding to the seedling stand 22, and the vertical height of the step portion 45 is the canopy. It is formed higher than the vertical height at the front part of 40. As a result, when the passenger stands up from the boarding seat 26 and replenishes the mat-shaped seedlings to the seedling stand 22, the passenger's work space is secured even without the vertical lift mechanism 5 and the air damper 40G. Easy to do.

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

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

(11) In the above-described embodiment, the seedling planting device W is shown as the working device, but the working device may be a sowing device, a fertilizer application device, or a spraying device for a chemical solution or the like. May be there.

(12) The present invention can also be applied to a rice transplanter, a sowing machine, a passenger management machine, a vegetable harvester, and the like.

The configuration disclosed in the above embodiment (including another embodiment, the same shall apply hereinafter) can be applied in combination with the configuration disclosed in other embodiments as long as there is no contradiction. Moreover, the embodiment disclosed in the present specification is an example, and the embodiment of the present invention is not limited to this, and can be appropriately modified without departing from the object of the present invention.

The present invention is applicable to field work machines having a canopy that covers the boarding area.

25: Boarding section 32: Front frame (first support section)
33: Connecting part (first support part)
34: Satellite positioning unit 40: Canopy 40F: Grip part 40G: Air damper (urgency mechanism)
42: Rear frame (second support)
5: Vertical elevating mechanism 51: First engaging part 55: Second engaging part 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 machine that can run in the field and
Work equipment that can work on the field and
A boarding section provided on the traveling machine over the width of the traveling machine, and
The first support portion erected in the area on one end side of the traveling machine, and
A second support portion erected in the area on the other end side of the traveling machine, and
A satellite positioning unit that is supported by the first support unit and can detect the position of the traveling aircraft using a navigation satellite,
A canopy that is swingably supported by the first support portion and is supported by the second support portion and covers the boarding portion from above.
A vertical lift mechanism that is provided at the upper end of the second support portion and is capable of raising and lowering the canopy up and down is provided.
The canopy has a working position where 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 and a working position where the second support portion is located at an angle from the working position. A field work machine whose vertical height can be switched between an auxiliary work position in which the height of the end portion of the satellite positioning unit is higher than that of the upper end portion of the satellite positioning unit. The working device is provided behind the traveling machine and is provided.
The field work machine according to claim 1, wherein the second support portion is provided on the side of the traveling machine body on the side where the work device is located with respect to the first support portion. The field work machine according to claim 1 or 2, further comprising an urging mechanism that is supported by the first support portion and urges the canopy to swing upward. The field work machine according to any one of claims 1 to 3, wherein a grip portion capable of raising and lowering the canopy is provided at a lower portion of the canopy on the side where the up and down mechanism is located. 6. Field work machine. The vertical elevating mechanism includes a first engaging portion provided on one of the canopy and the second support portion, and the first engaging portion provided on the other of the canopy and the second support portion. A second engaging portion, which can be engaged, is provided,
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 in the direction of 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 in the above.

Images