JP2020110105A - Farm field work machine - Google Patents

Abstract

To provide a farm field work machine having a canopy which is firmly supported by a traveling machine body, and the vertical height of which can be easily changed.SOLUTION: The farm field work machine includes: a traveling machine body C capable of traveling in a farm field; a work device W that is supportedly connected to the rear part of the traveling machine body C so as to be able to move up and down with respect to the farm field, and that is capable of working on the farm field; a riding part 25 provided on the traveling body C over the lateral width of the traveling body C; front support parts 32 that are erected on the front part of the traveling body C; rear support parts 54A, 54B that are erected on the rear part of the traveling body C, and that can change the vertical height of the upper end; a connecting part 33 that is swingably connected to and supported by the upper part of the front support part 32, and that can swing a free end part up and down; and a canopy 50 that is supported by the connecting part 33 and is placed on and supported by the rear support parts 54A, 54B to cover the riding part 25 from above.SELECTED DRAWING: Figure 1

Description

The present invention relates to a field working 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 the paddy field working machine is provided with a canopy (“roof” in the document) that covers an upper part of a riding section (“driving seat” region in the document). Has been. The canopy is supported by a front support portion ("support frame" in the literature) that extends upward from the front portion of the airframe.

JP, 2016-67259, A

By the way, the canopy disclosed in Patent Document 1 is configured such that the inclination posture of the canopy with respect to the front support portion can be changed, but the height at the front end of the canopy cannot be changed. For this reason, for example, when storing a field work machine in a warehouse, etc., if the height of the ceiling of the warehouse is lower than the height of the front end of the canopy, the worker can store the field work machine in front of the canopy or the front support. It is necessary to remove the part from the machine body, which makes it difficult for the operator to store the field work machine.

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 that 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 includes a traveling machine capable of traveling in a field, a working device supported and connected to a rear portion of the traveling machine so as to be able to move up and down with respect to the field, and a work device capable of performing work on the field. A riding section provided on the traveling machine body across the lateral width of the traveling machine body, a front support section standing upright on the front part of the traveling machine body, and standing upright on the rear part of the traveling machine body and at the upper and lower ends of the upper end. A rear support part whose height can be changed, and a connection part that is swingably connected to the upper part of the front support part, and a free end part that is vertically swingable, and a connection part that is supported by the connection part. A canopy mounted and supported on the rear support part and covering the riding part from above is provided, and the canopy boarded on the riding part by changing the vertical height of the upper end of the rear support part. It is characterized in that it is configured to be switchable between a working position in which a passenger can perform agricultural work in a vertical height and a storage position positioned lower than the working position.

According to the present invention, the canopy is supported by the front support portion and the rear support portion via the connecting portion. In other words, since the canopy is supported by both the front support portion and the rear support portion, even if the canopy is fanned by the wind, the canopy has a support structure that is cantilevered as compared with the canopy support structure. Become stronger. Further, since the connecting portion can swing up and down and the vertical height of the upper end of the rear support portion can be changed, the overall height of the canopy can be easily changed. Therefore, for example, even when the field working machine is stored in a warehouse or the like where the ceiling height is relatively low, the worker (the worker may be a passenger. The same applies hereinafter) removes the canopy. Without changing the overall height of the canopy, the field working machine can be stored in the warehouse or the like. As a result, a field working machine having a canopy which is firmly supported by the traveling machine body and whose vertical height can be easily changed is realized.

In the present invention, a pair of left and right rear support portions and a pair of left and right step-on/off steps that allow passengers to get in and out of the riding section from the left and right sides are provided. It is preferable to be located rearward of the machine step with respect to the operation step and inside the machine body with respect to the left and right ends of the working device.

With this configuration, the rear support portion is located rearward of the machine body with respect to the step for getting on and off. Therefore, the rear support portion is arranged at the rear portion of the riding portion or on the rear side of the riding portion. Accordingly, the canopy can cover the riding section from above while being firmly supported from the rear of the riding section or from the rear side of the riding section. Further, since the pair of left and right rear support portions are located inside the machine body with respect to both left and right end portions of the work device, the rear support portion is provided in comparison with the configuration in which the rear support portion is located outside the machine body with respect to both left and right end portions of the work device. The risk of contact with obstacles in the field is reduced.

In the present invention, the rear support portion extends above the first support portion and the first support portion which is provided upright on the rear portion of the traveling machine body, and the height position with respect to the first support portion can be changed. A second supporting portion, and a holding mechanism provided on the first supporting portion and capable of holding the second supporting portion in position, and the vertical height of the holding mechanism is the highest in the working device. In this case, it is preferable that the position is lower than the upper end of the working device.

In this configuration, the vertical height of the canopy is changed and held by the configuration that changes the relative height position of the second support portion with respect to the first support portion and the configuration that the holding mechanism holds the position of the second support portion. Is possible. That is, the structure of the rear support part capable of changing the vertical height of the canopy is realized with a structure as simple as possible. Further, since the vertical height of the holding mechanism is lower than the upper end portion of the working device when the working device is lifted most, the holding mechanism works even when the worker works on the working device. It is difficult for workers to disturb the work.

In the present invention, it is preferable that the connecting portion is provided with a satellite positioning unit capable of detecting the position of the traveling body using a navigation satellite.

With this configuration, the connecting portion serves as both the canopy support structure and the satellite positioning unit support structure. For this reason, the structure of the field working machine is simplified compared to the structure in which the satellite positioning unit is provided in a member different from the connecting portion, which is advantageous in terms of cost.

It is preferable that the canopy is switched to the storage position, the connecting portion is swung downward, and the satellite positioning unit is positioned lower than an upper end portion of the front support portion. is there.

According to this configuration, the free end portion of the connecting portion, which is capable of swinging up and down, is configured to swing integrally with the satellite positioning unit below the upper end portion of the front support portion. From this, it is possible to set the vertical height of the satellite positioning unit as high as possible when the canopy is in the working position, and to set the vertical height of the satellite positioning unit as low as possible when the canopy is in the storage position. Becomes In other words, the operator can lower the upper and lower positions of the satellite positioning unit and the canopy collectively by swinging the connecting portion downward. For this reason, it becomes easier for the worker to store the field work machine.

In the present invention, it is preferable that the upper and lower heights of the upper end of the canopy at the working position are higher than the upper end of the satellite positioning unit.

With this configuration, the upper and lower heights of the upper end of the canopy are located higher than the upper end of the satellite positioning unit, so that the working space in the up and down direction of the passenger on the riding section is secured as wide as possible, Workability is improved.

In the present invention, the canopy is configured to be switchable to a simple storage position that has a vertical height at which an occupant on the riding section can work and is lower than the working position.
The vertical height of the upper end of the canopy in the simple storage position is preferably lower than the upper end of the satellite positioning unit.

With this configuration, since the occupant can work while the vertical height of the canopy is lower than the work position, the total height of the field work machine can be kept lower than the work position, and Work space is secured. Moreover, the positioning accuracy of the satellite positioning unit is improved by the configuration in which the vertical height of the upper end of the canopy is located lower than the upper end of the satellite positioning unit.

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 front view which shows the boarding part in a riding-type rice transplanter, and its surrounding part. It is a perspective view which shows the part of a 1st spare seedling mounting base and a 2nd spare seedling mounting base. FIG. 6 is a right side view of the machine showing a support structure of a spare seedling stand unit having a second spare seedling mount. It is a front view which shows the support structure by the side of the free end in the spare seedling stand unit which has a 2nd spare seedling stand. It is a rear view which shows the support structure by the side of the base end in the spare seedling stand unit which has a 2nd spare seedling stand. It is a top view which shows the riding type rice transplanter which has a canopy. It is a machine body left side view showing a riding type rice transplanter when a canopy is in a simple storage position. It is a machine body left side view showing a riding type rice transplanter when a canopy is in a storage position. It is a machine body left side view showing a holding mechanism. It is a front view showing a holding mechanism. It is a machine body left side view showing a locking mechanism and a locked member. FIG. 14 is a cross-sectional view taken along line XIV-XIV of FIG. 13, showing the locking mechanism and the locked member. It is a bottom view which shows an example of a structure of the top part in a canopy.

[Basic configuration of farm work machine]
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, an arrow “F” indicates a front side of the traveling body C, an arrow “B” indicates a rear side of the traveling body C, an arrow “L” indicates a left side of the traveling body C, and an arrow “R”. Is the right side of the traveling body C.

As shown in FIG. 1 and FIG. 2, 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 body part 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 that can drive the traveling machine body C to travel and an openable hood 12 are provided. The bonnet 12 has an inclined surface that inclines rearward and is configured to accommodate the engine 13. Although not described in detail, a known HST (Hydraulic Static Transmission, not shown) is provided as a speed change mechanism for transmitting power of the engine 13 to the steered wheels 10, the rear wheels 11, or both. 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 drive type 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 leveling float 21, and a seedling stand 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 the 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 to plant each seedling from the lower portion of the seedling placing table 22. The seedlings are alternately taken out 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 in 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 working posture, the marker device 23 contacts the paddy field in the field as the traveling body C travels, and forms an index line (not shown) on the paddy 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 operation tools such as a main gearshift lever 28. The passenger seat 26 is provided in the central portion of the traveling body C and is configured so that a passenger can take a seat. The steering wheel 27 is configured so that the steering wheel 10 can be steered by a manual operation. For example, the operation of changing the traveling speed of the traveling machine body C and the operation of changing the traveling speed can be performed by operating the main shift lever 28 and the like, and the 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 riding portion 25, and step-in/step-out steps 35 are provided on both right and left sides of the floor portion 30. The boarding/alighting step 35 is configured such 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 50 described later is provided above the riding section 25.

On the left and right sides of the hood 12 of the traveling machine body C, a foldable first preliminary seedling placing base 31 having rails and a preliminary seedling placing unit 40 described later are provided. The first preliminary seedling placing base 31 and the preliminary seedling placing unit 40 are configured so that a preliminary seedling for supplying to the seedling planting device W can be placed. A pair of left and right first frames 32 are provided on the left and right sides of the hood 12 of the traveling body C. In the present invention, the first frame 32 is a front support portion provided upright on the front portion of the traveling machine body C.

The first frame 32 is a U-shaped rod-shaped member, and the first frame 32 is formed with a pair of first vertical support rods. The first frame 32 is formed in a U-shape by bifurcating a pair of first vertically supporting rods downward from the upper end of the first frame 32. The first frame 32 supports the first preliminary seedling placing base 31 and the preliminary seedling placing unit 40.

A hinge 33A is provided on each of the upper end portions of the pair of left and right first 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 lateral axis of the machine body via a pair of hinges 33A, 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 first frame 32 extends upward and a state in which the upper portion of the first frame 32 extends downward. .. As described above, the connecting portion 33 is swingably connected to and supported by the upper portion of the first frame 32, and the free end portion can be vertically swung.

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 spare seedling unit]
As shown in FIGS. 1 to 4, the first preliminary seedling placing table 31 has three foldable placing tables, and the three placing tables are connected side by side in front and rear. The first preliminary seedling placing table 31 is configured to be foldable by stacking the front placing table and the rear placing table with respect to the front-rear center placing stand on the front-rear center placing stand. The front mounting table is configured to swing back and forth around the swing fulcrum in front of the center mounting table in the front-rear direction, and the rear mounting table swings back and forth around the swing fulcrum behind the mounting table in the front-rear center. It is configured to be movable. As a result, the first preliminary seedling placing table 31 is extended back and forth during use, and the first preliminary seedling placing table 31 is in a usable state in which a mat-like seedling, a seedling box, a seedling scooping plate, etc. can be placed. In this way, the first preliminary seedling placing table 31 is supported by the front part of the traveling body C, and is in a use state in which it can be extended in the front-rear direction to place the seedlings and a folded state in which the seedlings cannot be placed by folding. And are configured to be switchable.

In the left side view of the machine body shown in FIG. 1, the operator swings the mounting table on the rear side in the clockwise direction and the mounting table on the front side in the counterclockwise direction. Is configured to be switchable from a folded state to a used state. However, the spare seedling stand unit 40 in use is located above the center table in the front-rear center, and the spare seedling stand unit 40 and the center table in the front-rear center of the first spare seedling stand 31 overlap in plan view. In the state where the first preliminary seedling placing table 31 is folded, the placing table on the front side and the placing table on the rear side are stacked on the placing table in the front-rear center. Therefore, when the worker tries to swing the front mounting table and the rear mounting table, the front mounting table and the rear mounting table come into contact with the preliminary seedling stand unit 40, and the worker makes the first preliminary backup. There is a possibility that the seedling placing table 31 cannot be switched to the use state. In order to avoid such an inconvenience, the preliminary seedling stand unit 40 is configured to be swingable around the vertical axis V that is vertical with respect to the first frame 32.

The preliminary seedling stand unit 40 includes a plurality of second preliminary seedling placement stands 41, a second frame 42, a locking support portion 43, and a swing support portion 44.

As shown in FIG. 3 and FIG. 4, the plurality of second preliminary seedling placing bases 41 are supported by the second frame 42 in a state of being vertically aligned. It should be noted that FIG. 4 shows the second preliminary seedling placing table 41, the second frame 42, and the like on the right side of the machine body. A pair of second vertical support bars is formed on the second frame 42. The second frame 42 is a bar-shaped member formed in a U-shape by bifurcating a pair of second vertical support rods downward from the upper end, and is on both sides of the pair of second vertical support rods. Each of the second preliminary seedling placing bases 41 is supported at the two positions. When viewed in the front-back direction, the second frame 42 cantilevers the second preliminary seedling placement table 41. Although not described in detail, each of the second preliminary seedling placing bases 41 is configured to be vertically swingable with respect to the second frame 42 about a longitudinal axis. The mounting surface of the second preliminary seedling mounting table 41 is along the horizontal direction with the second preliminary seedling mounting table 41 swinging to the lowermost side. In this state, a mat-shaped seedling, a seedling box, a seedling scooping plate, etc. can be placed on the second preliminary seedling placing table 41.

As shown in FIGS. 4 and 5, the locking support portion 43 is supported by a front first vertical support rod of the pair of first vertical support rods of the first frame 32, and the swing support portion is supported. 44 is supported by a rear first vertical support rod of the pair of first vertical support rods of the first frame 32. 5 to 7, the locking support portion 43, the swing support portion 44, and the like in the first frame 32 on the right side of the machine body are shown. As shown in FIGS. 5 and 7, the rocking support portion 44 has a pair of upper and lower shaft core hole portions 44A and 44B, and the pair of shaft core hole portions 44A and 44B are the same shaft cores that are vertically oriented shaft cores. It has a cylindrical hole along V. Of the pair of second vertical support rods in the U-shaped second frame 42, a pair of upper and lower swing connecting portions 42A and 42A are provided on a second vertical support rod at the rear of the machine body, and a pair of upper and lower swing connection portions are provided. The dynamic connecting portions 42A, 42A are swingably supported by the swing support portion 44 via a pair of fulcrum pins 46, 46. From this, the second vertical support rod at the rear of the machine body of the pair of second vertical support rods in the second frame 42 is the swing base end portion. Therefore, the second preliminary seedling placing table 41 is configured to be swingable around the vertical axis V. The fulcrum pin 46 is formed in a cylindrical shape.

One swing connecting portion 42A is provided with a pair of upper and lower horizontal plane portions that can come into contact with the shaft core hole portion 44A or the shaft core hole portion 44B from above and below, and through holes are formed in these horizontal plane portions. .. That is, a through hole is formed in each of the pair of upper and lower horizontal planes in each of the pair of upper and lower swing coupling portions 42A, 42A, and these through holes overlap in plan view.

The upper swing connecting portion 42A of the second frame 42 and the shaft core hole portion 44A can come into contact with each other. In addition, the lower swing connecting portion 42A of the second frame 42 and the shaft core hole portion 44B can come into contact with each other. Then, in a state where these are in contact with each other, the respective through holes in the pair of swing connecting portions 42A, 42A and the respective cylindrical hole portions in the pair of upper and lower shaft core hole portions 44A, 44B overlap in a plan view. To do. When the fulcrum pin 46 penetrates these holes, the pair of swing connecting parts 42A, 42A and the pair of upper and lower shaft core hole parts 44A, 44B are swingably connected.

A horizontal plane is formed at the upper end of the fulcrum pin 46, and the horizontal plane extends outside the cylindrical portion of the fulcrum pin 46. A hole through which the bolt 46a can be inserted is formed on this horizontal surface. The bolt 46a is inserted into this hole, and the bolt 46a is bolted to the swing connecting portion 42A, so that the fulcrum pin 46 and the swing connecting portion 42A are connected. As a result, the upper fulcrum pin 46 is fixedly connected to the swing connecting portion 42A and the shaft core hole portion 44A so as not to come off, and the lower fulcrum pin 46 is attached to the swing connecting portion 42A and the shaft core hole portion 44B. It is fixedly connected so that it does not come out.

As shown in FIGS. 5 and 6, the locking support portion 43 is provided with a pair of upper and lower locking portions 43A and 43B. The pair of locking portions 43A and 43B are formed in a C shape in a front view or a rear view, and through-holes penetrating vertically are formed in each of the locking portions 43A and 43B. The through holes in the pair of locking portions 43A and 43B are formed at overlapping positions in a plan view, and the pair of locking portions 43A and 43B are configured so that the rod-shaped portion of the hook member 45 can be vertically inserted. ing.

An intermediate surface portion 43C is formed between the upper surface portion and the lower surface portion of the lower locking portion 43B. A through hole is also formed in the intermediate surface portion 43C, and the locking portion 43B is configured such that the rod-shaped portion of the hook member 45 can also be inserted in the vertical direction in the intermediate surface portion 43C. In the space between the upper surface portion and the intermediate surface portion 43C of the locking portion 43B, the vertically oriented coil spring 47 and the washer 48 are inserted side by side vertically. The washer 48 is arranged below the coil spring 47.

Of the pair of second vertical support rods of the U-shaped second frame 42, the second vertical support rod of the front of the machine body, that is, the pair of upper and lower locked members 42B, 42B is provided at the free end. It is provided. That is, a pair of upper and lower engaged members 42B and 42B that can correspond to the pair of upper and lower engaging portions 43A and 43B are provided on the other end side of the pair of second vertically supporting rods. Through-holes that can correspond to the through-holes of the locking portions 43A and 43B are formed in the pair of upper and lower locked members 42B and 42B, respectively.

Among the lower surface portions of the locking portions 43A and 43B, the extending inclined surface is formed at the laterally outer end portion of the machine body. These extending inclined surfaces incline downward in the lateral direction of the machine body toward the lateral outside of the machine body. When the free end of the second frame 42 is swung to the side where the locking support 43 is located, the locked member 42B and the locking support 43 come into contact with each other. At this time, it is conceivable that the free end portion of the second frame 42 is displaced downward due to the bending of the second frame 42 that is cantilevered by the swing support portion 44. At this time, the locked members 42B, 42B are also displaced downward, but even in this case, the extended inclined surfaces formed on the lower surface portions of the locking portions 43A, 43B and the locked member 42B, respectively. , 42B abut. Then, the locked members 42B, 42B are lifted up integrally with the free end portion of the second frame 42 by these extended inclined surfaces.

As a result, the upper locked member 42B is inserted into the space between the upper surface portion and the lower surface portion of the locking portion 43A, and the upper locked member 42B is inserted into the space between the intermediate surface portion 43C and the lower surface portion of the locking portion 43B. The locked member 42B is inserted. In this state, the through holes in the pair of locking portions 43A and 43B and the through holes in the pair of upper and lower locked members 42B and 42B overlap in a plan view. Then, the rod-shaped portions of the hook member 45 are vertically inserted through these through holes, so that the locked members 42B, 42B are locked to the locking support portion 43.

In this way, the locking support portion 43 and the swing support portion 44 are supported by each of the pair of first vertical support rods of the first frame 32, and the locked members 42B and 42B are locked by the locking support portion 43. The second frame 42 is supported by the first frame 32 via the locking support portion 43 and the swing support portion 44 in a state of being locked by the. That is, one end side of the pair of second vertical support rods in the second frame 42 is pivotally connected to one end side of the pair of first vertical support rods in the first frame 32. Further, a locking support portion 43 capable of locking the other end side of the pair of second vertical support rods in the second frame 42 is provided at the other end side of the pair of first vertical support rods in the first frame 32. Has been. The second frame 42 is located on the lateral side of the machine body with respect to the first frame 32, and the second frame 42 is configured to be swingable toward the lateral side of the machine body integrally with the second preliminary seedling placing table 41.

As shown in FIGS. 1 to 3, in a state where the locked members 42B, 42B are locked to the locking support portion 43, the second preliminary seedling placing base 41 is directly above the first preliminary seedling placing base 31. Located in. As shown in FIG. 4, with the second preliminary seedling placing table 41 swung to the rear side of the machine body about the vertical axis V together with the second frame 42, the second preliminary seedling placing table 41 is set to the first preliminary state. It is not located right above the seedling stand 31. By the configuration in which the second preliminary seedling placing table 41 is located directly above the first preliminary seedling placing table 31, a wide space above the step-on/off step 35 is secured, so that when the passenger gets on/off the boarding section 25. The risk that the passengers feel cramped is reduced. Further, the second preliminary seedling placing base 41 is not located right above the first preliminary seedling placing base 31 in a state where the second preliminary seedling placing base 41 is swung to the rear side of the machine body. Therefore, even when the seedlings are placed on the second preliminary seedling placing table 41 while the first preliminary seedling placing table 31 is folded, the worker is placed on the second preliminary seedling placing table 41. The first preliminary seedling placing table 31 can be expanded to a usable state without removing the seedlings.

Since the riding-type rice transplanter, which is an example of the field work machine, is in a slightly tilted posture, the locking support portion 43 is locked by the configuration in which the locking support portion 43 is located on the front side of the machine body with respect to the swing support portion 44. Even if the state is released, the second frame 42 and the second preliminary seedling placing base 41 are unlikely to swing freely. In addition, the second frame 42 and the second preliminary seedling placement table 41 are located at the center of the machine front-rear direction in the machine front-rear direction when rocking to the rocking end point on the side opposite to the side where the locking support portion 43 is positioned. And can swing to the side where the lateral center of the machine is located in the lateral direction of the machine. Therefore, for example, when the worker stores the field working machine, by swinging the second frame 42 and the second preliminary seedling placing base 41 to the end opposite to the side where the locking support portion 43 is located, The storage space of the field work machine can be made compact. In this way, the first preliminary seedling placing table 31 and the second preliminary seedling placing table 41 that realize both the ease of seedling supplying work and the storage amount of the seedlings are realized.

As shown in FIGS. 4 to 6, in the rod-shaped portion of the hook member 45, an insertion hole through which the snap pin 45a can be inserted is formed in the lower end area of the area corresponding to the coil spring 47 and the washer 48. .. The snap pin 45a is inserted into the insertion hole with the coil spring 47 and the washer 48 positioned above the insertion hole. As a result, the snap pin 45a and the washer 48 come into contact with each other, and the coil spring 47 and the washer 48 are pushed upward as the hook member 45 slides upward. The coil spring 47 is compressed by the upper surface of the locking portion 43B and the washer 48, and the downward biasing force acts on the washer 48 and the snap pin 45a. As a result, the hook member 45 is biased to slide downward, and if no manual operation of the hook member 45 is performed, the hook member 45 penetrates the through holes of the pair of locking portions 43A and 43B. The position is maintained in the state where In other words, if the hook member 45 is not manually operated, the hook member 45 is held in a position where it can pass through the through holes of the swing connecting portions 42A, 42A.

In this way, the hook member 45 is hooked on the pair of upper and lower engaging portions 43A and 43B and the pair of upper and lower engaged members 42B and 42B, so that the hook member 45 is vertically moved to the upper and lower engaging portions 43A and 43B. The pair of locked members 42B, 42B is configured to be able to hold the locked state.

A connection support structure of the locking support portion 43 to the first frame 32 will be described with reference to FIGS. 4, 5, and 6. A portion of the locking support portion 43 connected to the first frame 32 is formed in a U shape in a plan view, and the locking support portion 43 is connected to and supported by the first frame 32. The first frame 32 is sandwiched in a space surrounded by a U shape in 43. The U-shaped base end portion of the locking support portion 43 is provided with locking portions 43A and 43B, and a pair of U-shaped tip portions extends from the U-shaped base end portion toward the side where the swing support portion 44 is located. Extend. In the locking support portion 43, a bolt insertion hole is formed in each of upper and lower central portions of a pair of plate-shaped members extending from the U-shaped base end portion toward the U-shaped front end portion. Further, a nut is welded and fixed to a portion of the pair of bolt insertion holes on the lateral outside of the machine body. Such a welded and fixed nut is hereinafter referred to as a "welded nut".

Although not shown, a bolt insertion hole is formed in a front first vertical support rod of the pair of first vertical support rods in the first frame 32, and the bolt insertion hole is formed in the first vertical support rod. The rod penetrates in the lateral direction of the fuselage. The bolt 43G is inserted into the bolt insertion hole in the first vertical support rod and the bolt insertion hole in the upper and lower central portions of the locking support portion 43, and the bolt 43G is fastened to the welding nut on the lateral outside of the machine body.

In the locking support portion 43, the upper and lower portions of the U-shaped tip portions of the pair of plate-shaped members described above expand toward the side where the swing support portion 44 is located, relative to the upper and lower central portions of the pair of U-shaped tip portions. Put out. A pair of bolt insertion holes are formed in each of the upper and lower bulged portions, and a welding nut is provided at a portion of these bolt insertion holes on the lateral outside of the machine body. Cylindrical spacers 43E, 43E are inserted over the pair of bolt insertion holes in each of the upper and lower bulging portions, and the bolts 43F, 43F are inserted in the space inside the cylinder of the pair of upper and lower spacers 43E, 43E. It Then, the bolts 43F and 43F are respectively fastened to the upper and lower welding nuts on the lateral outside of the machine body. Excessive tightening of the bolts 43F and 43F is prevented by the pair of upper and lower spacers 43E and 43E, and the distance between the pair of U-shaped tip portions is maintained by the distance between the spacers 43E.

As described above, the locking support portion 43 sandwiches the first frame 32 with a pair of U-shaped front end side plate-shaped members extending from the U-shaped base end portion. As a result, the locking support portion 43 is firmly connected to and supported by the first frame 32.

A connection support structure of the swing support portion 44 to the first frame 32 will be described with reference to FIGS. 4, 5 and 7. A portion of the swing support portion 44 connected to the first frame 32 is formed in a U shape in a plan view, and the swing support portion 44 is connected to and supported by the first frame 32. The first frame 32 is sandwiched in a space surrounded by a U shape in 44. The U-shaped base end portion of the swing support portion 44 is provided with shaft core hole portions 44A and 44B, and the pair of U-shaped tip portions face the locking support portion 43. In the swing support portion 44, a bolt insertion hole is formed in each of upper and lower central portions of a pair of plate-shaped members extending from the U-shaped base end portion toward the U-shaped tip end portion. Further, a welding nut is provided at a position on the lateral outside of the machine body in the pair of bolt insertion holes.

Although not shown, a bolt insertion hole is formed in a rear first vertical support rod of the pair of first vertical support rods in the first frame 32, and the bolt insertion hole is formed in the first vertical support rod. Through the machine. The bolt 44E is inserted through the bolt insertion hole in the first vertical support rod and the bolt insertion hole in the vertical center portion of the swing support portion 44, and the bolt 44E is fastened to the welding nut on the lateral outside of the machine body.

In the rocking support portion 44, the upper and lower portions of the U-shaped tip portions of the pair of plate-shaped members described above bulge toward the side where the locking support portion 43 is located than the upper and lower central portions of the pair of U-shaped tip portions. Put out. A pair of bolt insertion holes are formed in each of the upper and lower bulged portions, and a welding nut is provided at a portion of these bolt insertion holes on the lateral outside of the machine body. Cylindrical spacers 44C and 44C are inserted across the pair of bolt insertion holes in the upper and lower bulging portions, and bolts 44D and 44D are inserted into the spaces in the cylinder of the pair of upper and lower spacers 44C and 44C, respectively. It Then, the bolts 44D, 44D are respectively fastened to the upper and lower welding nuts on the lateral outside of the machine body. Excessive tightening of the bolts 44D, 44D is prevented by the pair of upper and lower spacers 44C, 44C, and the distance between the pair of U-shaped tip portions is maintained by the distance of the spacer 44C.

In this way, the swing support portion 44 sandwiches the first frame 32 with a pair of U-shaped front end side plate-shaped members extending from the U-shaped base end portion. As a result, the swing support portion 44 is firmly connected to and supported by the first frame 32.

[About the structure of the canopy]
As shown in FIGS. 1, 3, and 8 to 10, a canopy 50 is provided above the riding section 25. A pair of swinging pivotally supporting portions 51, 51 are swingably connected to two positions on the left and right of the front portion of the canopy 50. A pair of swinging pivotally supporting portions 51, 51 are externally fitted to the left and right ends of the upper portion of the connecting portion 33. Thereby, the canopy 50 is configured to be swingable around the pair of swing pivotally supporting portions 51, 51.

A pair of rear support portions are provided upright from the left and right ends of the rear portion of the traveling body C. The pair of left and right rear support portions is located behind the aircraft in relation to the boarding/alighting step 35 and inside the aircraft from both left and right ends of the seedling planting device W as a working device. Accordingly, the canopy 50 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). In addition, since the pair of left and right rear support portions are located inside the fuselage from both left and right ends of the seedling planting device W, the rear support portions are located outside the fuselage from both left and right ends of the seedling planting device W. As a result, the risk that the rear support portion contacts an obstacle or the like in the field is reduced.

The rear support portion has a first support portion 54B and a second support portion 54A. The first support portion 54B is erected on the rear portion of the traveling body C. The second support portion 54A is configured to be able to extend above the first support portion 54B and to be able to change the height position with respect to the first support portion 54B. A holding mechanism 55 is provided on the upper end portion of the first support portion 54B, and the holding mechanism 55 is configured to hold the second support portion 54A in position. The second support portion 54A and the first support portion 54B are connected to each other via a holding mechanism 55 so as to extend vertically. As a result, the rear support portion is configured to be able to change the vertical height of the upper end.

A pair of locked members 53, 53 are connected to the left and right end portions of the canopy 50 near the rear portion thereof, and the position of the locked member 53 of the canopy 50 is supported by the second support portion 54A. The pair of first support portions 54B and 54B are provided laterally outside the aircraft body with respect to the boarding/alighting step 35 in the aircraft lateral direction. The vertical height of the holding mechanism 55 is located lower than the upper end portion of the seedling planting device W when the seedling planting device W as a working device is most raised. Therefore, even when the worker works on the seedling planting device W, the holding mechanism 55 is unlikely to interfere with the work of the worker.

In this way, the canopy 50 is supported by the connecting portion 33 and is also placed and supported by the second support portion 54A of the pair of rear support portions, and covers the riding portion 25 from above. The connecting portion 33 also serves as a support structure for the canopy 50 and a support structure for the satellite positioning unit 34.

The canopy 50 includes a pair of left and right front outer frame frames 50A and 50B, a rear outer frame frame 50C, a front horizontal frame 50D, a rear horizontal frame 50E, a first front and rear frame 50F, and three second front and rear frames 50G, It has 50G and 50G. The front outer frame 50A is provided on the left side of the machine body, and the front outer frame 50B is provided on the right side of the machine. These frames may be made of metal or may be made of resin such as polyvinyl chloride.

Each of the front outer frame frames 50A and 50B and the rear outer frame frame 50C is a bar-shaped member that is formed by bending, and is formed to have the same or substantially the same size and shape in each cross section. The front outer frame frames 50A and 50B are formed symmetrically in a plan view. Of the respective pipe end portions of the front outer frame frames 50A and 50B, the end portions on the front side of the machine body face each other, and these end portions are connected to each other via a fitting member (not shown). Each of the front outer frame frames 50A and 50B extends laterally outside the machine body and toward the rear side of the machine body from this connection point, and the rear end portions of the front outer frame frames 50A and 50B are directed toward the rear side of the machine body.

The rear outer frame 50C is bent and formed in a U shape in a plan view, and the respective end portions of the U-shaped rod-shaped members are directed to the front of the machine body. The pipe end portions of the front outer frame frame 50A and the rear outer frame frame 50C are connected to each other via a fitting member 52. Further, the respective pipe end portions of the front outer frame frame 50B and the rear outer frame frame 50C are connected to each other via a fitting member 52. The fitting member 52 on the left side of the machine body is externally fitted from the rear to the rear end portion of the front outer frame frame 50A on the rear side of the machine body, and is fitted from the front to the rear end portion of the rear outer frame frame 50C on the left side of the machine body. The fitting member 52 on the right side of the machine body is externally fitted from the rear to the rear end portion of the front outer frame frame 50B on the rear side of the machine body, and from the front to the rear end portion of the rear outer frame frame 50C on the right side of the machine body. Thus, the outer frame of the canopy 50 is formed by the left and right symmetrical front outer frame frames 50A and 50B and the rear outer frame frame 50C.

Each of the front outer frame frames 50A and 50B may be integrally configured with the fitting member 52, or the rear outer frame frame 50C and the left and right fitting members 52, 52 may be integrally configured. Is also good. Further, each of the front outer frame frames 50A and 50B may be configured to be expandable and contractable with respect to the rear outer frame frame 50C.

The front horizontal frame 50D and the rear horizontal frame 50E are rod-shaped members that extend in the lateral direction of the machine body inside the outer frame of the canopy 50. Both ends of the front horizontal frame 50D are connected to respective front and rear intermediate portions of the front outer frame frames 50A and 50B. Both ends of the rear horizontal frame 50E are connected to respective front-rear direction intermediate portions of the U-shaped front extension region of the rear outer frame 50C.

The first front-rear frame 50F is a rod-shaped member extending in the front-rear direction. Both ends of the first front-rear frame 50F are connected to a connection portion between the front outer frame frame 50A and the front outer frame frame 50B and a middle portion in the longitudinal direction of the front horizontal frame 50D. The mirror 57 is supported by the first front and rear frame 50F. The mirror 57 is used by a passenger to confirm the rear of the traveling body C, and the passenger can confirm the rear of the aircraft via the mirror 57 while facing the front of the aircraft.

The second front-rear frame 50G is a rod-shaped member extending in the front-rear direction, and the second front-rear frame 50G is formed so that its cross section is smaller than the cross sections of the front outer frame frames 50A and 50B and the rear outer frame frame 50C. Has been done. Each of the three second front and rear frames 50G, 50G, 50G is arranged side by side in the machine lateral direction. Both ends of each of the three second front and rear frames 50G, 50G, 50G are connected to the front horizontal frame 50D and the rear end portion of the rear outer frame 50C, respectively.

The canopy 50 covers the riding section 25 by covering the flexible hood 58 from above inside the outer frame of the canopy 50. Although the hood 58 is not shown in FIGS. 3 and 8, the hood 58 actually exists in FIGS. 3 and 8. The hood 58 covers the riding section 25 from above the outer frame of the canopy 50, the front horizontal frame 50D, the rear horizontal frame 50E, the first front-rear frame 50F, and the second front-rear frame 50G. The front end of the canopy 50 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 portion of the canopy 50, the rainwater falls on the hood 12 and slides forward along the inclined surface, so that the steering handle 27 or the steering handle in the riding section 25 is removed. It is possible to reduce the risk that rainwater will drip to various meter devices on the front side of the handle 27.

The pair of left and right swing pivotally supporting portions 51, 51 are connected to the front outer frame frame 50A and the front outer frame frame 50A, respectively. The pair of swinging pivotally supporting portions 51, 51 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 51, 51. In the present embodiment, the front end portions of the front outer frame frames 50A and 50B, that is, the connecting points between the front outer frame frame 50A and the front outer frame frame 50B are more than the front end portions of the front outer frame frames 50A and 50B in the front-rear direction. Located on the rear side. That is, the front end portions of the front outer frame frames 50A and 50B in the front-rear direction overlap the satellite positioning unit 34 in the front-rear direction. Therefore, when the canopy 50 swings around the pair of swing pivotally supporting portions 51, 51, the front outer frame frames 50A, 50B and the satellite positioning unit 34 may interfere with each other. In order to avoid this inconvenience, the front outer frame 50A and the front outer frame 50B are connected to each other such that the connecting portion between the front outer frame 50A and the front outer frame 50B is located behind the front end portions of the front outer frame 50A and 50B in the front-rear direction. The frames 50A and 50B are configured. As a result, the recessed space S is formed at the right and left center of the front end portion of the canopy 50, and the rear portion of the satellite positioning unit 34 is located in the recessed space S. With this configuration, even if the canopy 50 swings around the pair of swinging pivotally supporting portions 51, 51, the connection location between the front outer frame frame 50A and the front outer frame frame 50B is located behind the satellite positioning unit 34. Rock with. Therefore, the interference between the front outer frame frames 50A and 50B and the satellite positioning unit 34 is avoided.

The locked member 53 on the left side of the machine body is welded and fixed to a lower portion of the rear outer frame 50C on the left side of the machine body near the side where the fitting member 52 is located. Further, the locked member 53 on the right side of the machine body is welded and fixed to a lower side portion of the rear outer frame 50C on the right side of the machine body, which is close to the side where the fitting member 52 is located. That is, the locked member 53 is connected downward to the canopy 50. In this way, the pair of left and right locked members 53, 53 are connected to the respective intermediate portions in the front-rear direction of the U-shaped front extension region of the rear outer frame 50C.

As shown in FIGS. 1, 3, 9, and 10, the height of the canopy 50 is configured to be adjustable in a plurality of stages. Specifically, the holding mechanism 55 is provided on the upper end portion of the first support portion 54B, and three engaging protrusions 54C, 54D, 54E are provided side by side along the longitudinal direction of the second support portion 54A. That is, each of the three engagement protrusions 54C, 54D, and 54E protrudes from the surface of the second support portion 54A at different heights in the second support portion 54A. The holding mechanism 55 is formed in a U shape having an opening on the lateral inner side of the machine body in a plan view, and an engaging recess 55k is formed on an end portion of the U-shaped lateral body inner side. The engagement recess 55k and each of the engagement protrusions 54C, 54D, 54E are engageable, and depending on which of the engagement protrusions 54C, 54D, 54E engages with the engagement recess 55k. The vertical height of the canopy 50 changes. As described above, the second support portion 54A is provided with the plurality of engaging protrusions 54C, 54D, 54E protruding from the surface of the second support portion 54A in a state of being aligned in the longitudinal direction of the second support portion 54A, and the holding mechanism. At 55, an engagement recess 55k that can engage with the engagement protrusions 54C, 54D, 54E is formed.

In the embodiment shown in FIG. 1, the engagement protrusion 54C and the engagement recess 55k engage with each other. In this state, the canopy 50 inclines rearward and upward. The vertical height of the upper end of the canopy 50 at this time is higher than the upper end of the satellite positioning unit 34. Accordingly, 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. That is, if the vertical height of the canopy 50 shown in FIG. 1 is used, the farming work of the passengers who board the riding section 25 is possible. In this embodiment, this position is referred to as a "working position".

When the vertical height of the canopy 50 is set to the working position, the canopy 50 tilts backward and upward. Further, as described above, the front end portion of the canopy 50 is located on the front side of the upper end portion of the rearward-increasing inclined surface of the bonnet 12. Therefore, even if the rainwater falls on the canopy 50, the rainwater is guided by the front end of the canopy 50 and drips from the front end of the canopy 50 to the rearwardly inclined surface of the bonnet 12.

The upper end of the canopy 50 is the rear end of the canopy 50 when the canopy 50 is inclined rearwardly. The front end of the canopy 50 is the swinging base end of the canopy 50. Therefore, even when the canopy 50 swings up and down, the vertical height of the front end portion of the canopy 50 hardly changes as compared with the vertical height of the rear end portion of the canopy 50. That is, the amount of change in the vertical position relative to the front end of the canopy 50 and the satellite positioning unit 34 is smaller than the amount of change in the vertical position relative to the rear end of the canopy 50 and the satellite positioning unit 34. Since the rear end portion of the canopy 50 is the farthest point from the satellite positioning unit 34 in the canopy 50, the positioning accuracy of the satellite positioning unit 34 is ensured and the working space of the passenger in the vertical direction is secured. ..

In the embodiment shown in FIG. 9, the engagement protrusion 54D and the engagement recess 55k engage with each other. In this state, the canopy 50 is horizontal or substantially horizontal in the front-rear direction. The vertical height of the upper end of the canopy 50 at this time is lower than the upper end of the satellite positioning unit 34. Therefore, with the vertical height of the canopy 50 shown in FIG. 9, it is possible to perform agricultural work for a passenger who has boarded the riding section 25 while the canopy 50 is positioned lower than the above-described working position. In addition, since the vertical height of the upper end of the canopy 50 is lower than the upper end of the satellite positioning unit 34, the satellite positioning unit is more likely than the vertical position of the canopy 50 is set to the working position. It is easy to ensure the positioning accuracy of 34 sufficiently. In this embodiment, this position is referred to as a "simple storage position".

In the embodiment shown in FIG. 10, the connecting portion 33 is swung downward, and the satellite positioning unit 34 is located below the upper end portion of the first frame 32. In this state, the engagement protrusion 54E and the engagement recess 55k are engaged with each other, and the canopy 50 is inclined rearward and upward toward the rear side. The vertical height of the upper end of the canopy 50 is higher than the upper end of the satellite positioning unit 34. At the height of the canopy 50 at this time, an occupant riding on the riding section 25 cannot perform agricultural work. In this embodiment, this position is referred to as a "storage position".

As described above, the canopy 50 changes the vertical height of the upper end of the second support portion 54A, so that the occupant in the riding position 25 has a vertical working height at which the occupant can carry out farming work, and the riding portion 25. It is configured to be switchable between a simple storage position that is lower than the working position and a storage position that is lower than the simple storage position, which has a vertical height that allows a passenger who has boarded the vehicle to work.

[Canopy holding mechanism]
As shown in FIGS. 1, 3, 11, and 12, the second support portion 54A is supported by the holding mechanism 55. The holding mechanism 55 has a U-shaped first locking pin 55A, a slide member 55B, and a snap pin 55C. Further, the first locking pin 55A is provided with a first through hole 55d, a second through hole 55e, and projections 55f and 55f. The first locking pin 55A is configured to be slidable in the machine longitudinal direction along the support hole 55j of the holding mechanism 55, and has a first through hole 55d and a tip portion 55g at both ends of the U shape of the first locking pin 55A. Is located. The end portion of the first locking pin 55A where the first through hole 55d and the tip portion 55g are located faces the rear of the machine body, but the end portion where the first through hole 55d and the tip portion 55g is located is the machine body. The first locking pin 55A may be configured so as to face forward. An intermediate portion in the longitudinal direction between the U-shaped ends of the first locking pin 55A is located on the opposite side of the U-shaped ends with the support hole 55j interposed therebetween in the machine body front-rear direction. The protrusions 55f, 55f are located on the front side of the machine body with respect to the support holes 55j, and protrude toward the outer diameter side with respect to the inner diameter of the support holes 55j. The slide member 55B is fitted on the first locking pin 55A on the rear side of the machine body with respect to the support hole 55j.

A through hole 55i is formed in the holding mechanism 55. Further, three through holes 54f, 54g, 54h are formed in the second support portion 54A. The through hole 54f is located directly above the engaging projection 54C, the through hole 54g is located directly above the engaging projection 54D, and the through hole 54h is located directly above the engaging projection 54E.

The through hole 55i and the through hole 54f overlap each other in the front-rear direction when the engaging protrusion 54C and the engaging recess 55k are engaged with each other. In this state, the worker inserts the tip portion 55g of the first locking pin 55A into the through hole 55i and the through hole 54f, so that the first locking pin 55A can lock the second support portion 54A. ..

The through hole 55i and the through hole 54g overlap with each other in the front-rear direction when the engaging protrusion 54D and the engaging recess 55k are engaged with each other. In this state, the operator inserts the tip portion 55g of the first locking pin 55A into the through hole 55i and the through hole 54g, so that the first locking pin 55A can lock the second support portion 54A. ..

The through hole 55i and the through hole 54h overlap each other in the front-rear direction when the engaging protrusion 54E and the engaging recess 55k are engaged with each other. In this state, the worker inserts the tip portion 55g of the first locking pin 55A into the through hole 55i and the through hole 54h, so that the first locking pin 55A can lock the second support portion 54A. ..

With the first locking pin 55A inserted through any of the through holes 54f, 54g, 54h and the through hole 55i, the operator positions the slide member 55B at the support hole 55j rather than the second through hole 55e. Slide to the side and insert the snap pin 55C into the second through hole 55e. As a result, the slide of the slide member 55B is restricted by the snap pin 55C, and the slide of the first locking pin 55A is restricted by the slide member 55B and the projections 55f, 55f. With this configuration, the tip portion 55g is prevented from coming off from the through hole 55i and the through hole 54f, and the second support portion 54A is locked by the first locking pin 55A. In this way, through holes 54f, 54g, 54h, and 55i through which the first locking pin 55A can pass are formed in the holding mechanism 55 and the second support portion 54A, respectively.

When the worker removes the snap pin 55C from the second through hole 55e and inserts the snap pin 55C into the first through hole 55d while the second support portion 54A is locked by the first locking pin 55A, the slide is performed. The member 55B is slidable in a region between a portion in contact with the support hole 55j and a portion in contact with the snap pin 55C inserted in the first through hole 55d. Along with this, the first locking pin 55A has a portion where the support hole 55j and the protrusions 55f, 55f contact each other, and the slide member 55B has a snap pin 55C inserted into the support hole 55j and the first through hole 55d. It becomes slidable in the front-rear direction over the area between the area sandwiched between. Therefore, when the first locking pin 55A slides on the side where the protrusions 55f and 55f move away from the support hole 55j, the tip portion 55g comes off the through hole 55i and the through hole 54f, and the first support pin 55A moves to the second support portion 54A. The locked state of the one locking pin 55A is released. A separate snap pin may be inserted into the first through hole 55d in advance, and the operator may simply remove the snap pin 55C from the second through hole 55e.

[Canopy locking mechanism]
As shown in FIGS. 1, 3, 13, and 14, a locking mechanism 56 capable of locking the canopy 50 is provided on the upper end portion of the second support portion 54A, and the canopy 50 has a locking mechanism 56. An engaged member 53 that can be engaged is provided. The upper end portion of the second support portion 54A is formed so as to be bent from the upper side toward the body lateral inward direction. Although not described in detail, the locking mechanism 56 is supported at the end portion of the second support portion 54A facing the laterally inward direction of the machine body so as to be swingable around the lateral axis.

The locking mechanism 56 has a U-shaped second locking pin 56A, a slide member 56B, and a snap pin 56C. Further, a first through hole 56d, a second through hole 56e, and protrusions 56f and 56f are formed in the second locking pin 56A. The second locking pin 56A is configured to be slidable in the machine front-rear direction along the support hole 55j of the locking mechanism 56, and the first through hole 56d and the tip portion 56g are provided at the U-shaped ends of the second locking pin 56A. And are located. The end of the second locking pin 56A where the first through hole 56d and the tip portion 56g are located faces the lateral side of the machine body, but the end where the first through hole 56d and the tip portion 56g are located. The second locking pin 56A may be configured so as to face inward of the machine body. An intermediate portion in the longitudinal direction between the U-shaped ends of the second locking pin 56A is located on the opposite side of the U-shaped ends with the support hole 56j interposed therebetween in the machine body front-rear direction. The protrusions 56f, 56f are located on the front side of the machine body with respect to the support holes 56j, and protrude toward the outer diameter side with respect to the inner diameter of the support holes 56j. The slide member 56B is fitted onto the second locking pin 56A on the rear side of the machine body with respect to the support hole 56j.

The locking mechanism 56 is formed in a U shape having an open upper side when viewed in the front-rear direction. That is, a recess is formed in the locking mechanism 56, and the recess is configured to be recessed in a U shape in the vertical direction and to allow the locked member 53 to be placed and supported.

A through hole 56i is formed in the locking mechanism 56. A through hole 53i is formed in the locked member 53. With the locked member 53 placed and supported by the locking mechanism 56, the through hole 56i and the through hole 53i overlap each other in a side view. In this state, the operator inserts the tip portion 56g of the second locking pin 56A into the through hole 56i and the through hole 53i, so that the second locking pin 56A can lock the locked member 53. ..

With the second locking pin 56A inserted through the through hole 53i and the through hole 56i, the operator slides the slide member 56B toward the side where the support hole 56j is located, rather than the second through hole 56e. The snap pin 56C is inserted into the second through hole 56e. As a result, the slide of the slide member 56B is restricted by the snap pin 56C, and the slide of the second locking pin 56A is restricted by the slide member 56B and the protrusions 56f, 56f. With this configuration, the tip portion 56g is prevented from coming off the through hole 56i and the through hole 53i, and the locked member 53 is locked to the second locking pin 56A. In this way, through holes 53i, 56i through which the second locking pin 56A can pass are formed in each of the locking mechanism 56 and the locked member 53.

When the operator removes the snap pin 56C from the second through hole 56e and inserts the snap pin 56C into the first through hole 56d while the locked member 53 is locked by the second locking pin 56A, the slide is performed. The member 56B is slidable in a region between a portion in contact with the support hole 56j and a portion in contact with the snap pin 56C inserted in the first through hole 56d. Along with this, the second locking pin 56A has a position where the support hole 56j and the protrusions 56f and 56f contact each other, and the slide member 56B has a snap pin 56C inserted into the support hole 56j and the first through hole 56d. It becomes slidable in the lateral direction of the machine body over the area between the area sandwiched between the two. Therefore, when the second locking pin 56A slides on the side where the protrusions 56f and 56f move away from the support hole 56j, the tip 56g comes out of the through hole 56i and the through hole 53i, and the first locking member 53 The locked state of the second locking pin 56A is released. Alternatively, a separate snap pin may be inserted into the first through hole 56d in advance, and the operator may simply remove the snap pin 56C from the second through hole 56e.

The locked member 53 is positioned directly above the locking mechanism 56 in a state where the vertical height of the canopy 50 is positioned at the working position or the simple storage position. For this reason, the locked member 53 enters the recess in the locking mechanism 56, and the locked member 53 is placed and supported by the locking mechanism 56. In this state, the locked member 53 and the locking mechanism 56 are integrally connected by inserting the second locking pin 56A into the through hole 53i and the through hole 56i. As a result, the canopy 50 cannot swing up and down, and the vertical height of the canopy 50 is firmly held even if the canopy 50 is swung by the wind.

With the vertical height of the canopy 50 positioned at the storage position, the position of the locked member 53 is displaced toward the rear side of the machine body with respect to the locking mechanism 56. Therefore, not the locked member 53 but the front portion of the rear outer frame 50C or the fitting member 52 enters the recess of the locking mechanism 56, and the rear outer frame 50C is placed and supported on the locking mechanism 56. To be done. In this state, the second locking pin 56A cannot lock the locked member 53, but when the second locking pin 56A is stored in a barn or the like with a low ceiling, the canopy 50 is rarely swung by the wind, and therefore the canopy 50 is simply rearward A configuration in which the outer frame 50C is placed and supported by the locking mechanism 56 is sufficient. The second locking pin 56</b>A may be configured to be able to lock the locked member 53 even when the vertical height of the canopy 50 is located at the storage position. In this case, for example, the locked member 53 may be configured to be slidable with respect to the rear outer frame 50C.

[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 canopy 50 is configured to be switchable between the working position shown in FIG. 1, the simple storage position shown in FIG. 9, and the storage position shown in FIG. However, the present invention is not limited to this embodiment. For example, the simple storage position shown in FIG. 9 may be the storage position, or the storage position shown in FIG. 9 may not be switched. That is, the canopy 50 may be configured to be switchable only between two positions: the working position shown in FIG. 1 and the simple storage position as the storage position shown in FIG.

Further, the position of the canopy 50 may not be switched to the simple storage position shown in FIG. That is, the canopy 50 may be configured to be switchable only between two positions: the working position shown in FIG. 1 and the simple storage position as the storage position shown in FIG.

Further, the simple storage position shown in FIG. 9 may be the work position, or the work position may not be switched to the work position shown in FIG. That is, the canopy 50 may be configured to be switchable only between two positions, that is, the simple storage position as the work position shown in FIG. 9 and the storage position shown in FIG.

In short, the canopy 50 has a work position in which the vertical height of the upper end of the second support portion 54A as the rear support portion is changed so that the passenger on the riding portion 25 can perform agricultural work. It suffices if it can be switched to the storage position which is lower than the working position.

(2) An example of the structure of the hood 58 of the canopy 50 will be described with reference to FIG. FIG. 15 shows a bottom view of the canopy 50 covered with the hood 58 (a view seen from above the passenger seat 26 in FIG. 1). As described above, the outer frame of the canopy 50 is formed by the left and right symmetrical front outer frame frames 50A and 50B and the rear outer frame frame 50C. The hood 58 covers the outer frame of the canopy 50 from above, and the outer peripheral end of the hood 58 is wound around the outer frame of the canopy 50. Then, the outer peripheral end portion of the hood 58 is locked to the lower surface of the hood 58 while being wound inside the outer frame of the canopy 50.

As a method of locking the outer peripheral end of the hood 58, a hook-and-loop fastener, a snap button, or the like can be considered. In the example shown in FIG. 15, of the outer peripheral ends of the hood 58, a first engaging portion 58A formed by a surface fastener is provided on the outer peripheral end on the front side of the machine body, and a second engaging portion formed by a magnet is formed on the outer peripheral end on the rear side of the machine body. A locking portion 58B is provided. That is, the first locking portion 58A can be adhered to the lower surface inside the hood 58 by a surface fastener, and the second locking portion 58B can be attracted to each other inside the hood 58 by a magnet. Alternatively, the outer outer surface or the lower surface of the rear outer frame 50C may be provided with a substance responsive to a magnetic force, and the second locking portion 58B may be wound around the outer surface or the lower surface of the rear outer frame 50C to be attracted. good.

In the embodiment illustrated in FIG. 15, the attraction force of the magnet of the second engaging portion 58B is set to be weaker than the adhesive force of the surface fastener of the first engaging portion 58A. That is, for example, when the canopy 50 is swirled by the wind and the hood 58 receives a wind pressure, the second engaging portion 58B is configured so that the attraction of the magnet in the second engaging portion 58B is easily released. Therefore, when the canopy 50 is fanned by the wind, the outer peripheral end of the hood 58 is unwound around the outer frame of the canopy 50 on the rear side of the body, and the rear side of the hood 58 is blown by the wind. Further, since the surface fastener of the first engaging portion 58A firmly holds the wound state with respect to the outer frame of the canopy 50 on the front side of the machine body, the possibility that the hood 58 is blown by the wind is prevented. That is, according to the embodiment shown in FIG. 15, the area in which the wind pressure is applied to the hood 58 is reduced only to the front part of the hood 58 due to the structure in which only the rear part of the hood 58 is blown by the wind. For this reason, it is possible to prevent the frame of the canopy 50 from being damaged or the field work machine from being disturbed by the wind to hinder the steering operation.

Further, in the embodiment illustrated in FIG. 15, even in the second locking portion 58B, only the portions corresponding to the pair of left and right corners of the rear outer frame 50C can be bonded by the surface fastener. good. In this case, the adhesive force of the surface fastener at the second locking portion 58B may be weaker than the adhesive force of the surface fastener at the first locking portion 58A. The adhesive force of the surface fastener at the second locking portion 58B may be stronger than the attraction force of the magnet. With this configuration, it is possible to reduce the risk that the attraction of the magnet at the second locking portion 58B is frequently released only by the canopy 50 being swung by the weak wind, and the canopy 50 is swung by the wind having a predetermined strength or more. In this case, a structure in which the rear portion of the hood 58 is blown by the wind can be realized.

(3) In the above-described embodiment, the first frame 32 serving as the front support portion may be configured integrally with the support column frame 15. That is, the front support portion may be configured by the first frame 32 and the support column frame 15. Further, in the above-described embodiment, the front support portion is configured by a left and right pair, but the front support portion may not be a left and right pair. For example, the configuration may be such that one first frame 32 and one support column frame 15 are erected from the left and right center of the machine body. Further, the connecting portion 33 may be swingably connected to the upper portion of the first frame 32, and the free end of the connecting portion 33 may be vertically swingable.

(4) In the above-described embodiment, the rear support portion is configured as a left and right pair, but the rear support portion may not be a left and right pair. For example, one second support portion 54A and one first support portion 54B may be erected from the lateral center of the machine body. Further, the canopy 50 may be placed and supported on the second support portion 54A at the left-right center portion, the rear end portion, or the like of the canopy 50.

(5) In the above-described embodiment, the second support portion 54A and the first support portion 54B as the left and right rear support portions are provided on the rear side of the vehicle body with respect to the boarding/alighting step 35, but are limited to this embodiment. Not done. The second support portion 54A and the first support portion 54B may be provided in front of the aircraft with respect to the boarding/alighting step 35.

(6) In the above-described embodiment, the second support portion 54A and the first support portion 54B as the pair of left and right rear support portions are located on the inner side of the fuselage than the left and right end portions of the seedling planting device W. It is not limited to the form. The second support portion 54A and the first support portion 54B may be located outside the machine body with respect to the left and right ends of the seedling planting device W.

(7) In the above-described embodiment, the vertical height of the holding mechanism 55 is located lower than the upper end of the seedling planting device W when the seedling planting device W rises most, but is not limited to this embodiment. .. The vertical height of the holding mechanism 55 may be the same height as the upper end of the seedling planting device W when the seedling planting device W is raised most, or when the seedling planting device W is raised most. It may be located higher than the upper end of the seedling planting device W.

(8) In the above-described embodiment, the satellite positioning unit 34 is provided in the connecting section 33, but the present invention is not limited to this embodiment. For example, the satellite positioning unit 34 may be provided at the rear end or the upper end of the canopy 50.

(9) 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.

(10) The present invention is not limited to the above-described embodiment, and even when the canopy 50 is in the up/down position at the storage position, the passenger on the riding section 25 may perform some work. For example, a portion of the hood 58 of the canopy 50 that is located directly above the boarding seat 26 is configured to be openable and closable, and even if the upper and lower positions of the canopy 50 are the storage positions, a passenger can sit in the boarding seat 26. As described above, the canopy 50 may be configured. At this time, the rear outer frame 50C, the front horizontal frame 50D, and the rear horizontal frame 50E located right above the boarding seat 26 may be detachably configured.

(11) The present invention is also applicable to a rice transplanter, a seeder, and a passenger management machine, and the field work machine of the present invention includes a rice transplanter, a seeder, and a passenger management machine.

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: First frame (front support section)
33: Connection part 34: Satellite positioning unit 35: Boarding/alighting step 50: Canopy 54A: Second support part (rear support part)
54B: First support part (rear support part)
55: Holding mechanism C: Traveling machine W: Seedling planting device (working device)

Claims (7)

A traveling aircraft that can travel in the field,
A work device that is supported and connected to the rear part of the traveling machine body so as to be able to move up and down with respect to the field, and that is capable of working on the field,
A riding section provided on the traveling body over the lateral width of the traveling body,
A front support portion standing upright on the front portion of the traveling body,
While being erected on the rear part of the traveling machine body, a rear support part capable of changing the vertical height of the upper end,
A connecting portion that is swingably connected to and supported by the upper portion of the front support portion, and has a free end portion that can swing up and down.
A canopy supported by the connecting portion and placed and supported by the rear supporting portion, and covering the riding portion from above,
The canopy is positioned lower than the work position, which is a work position with a height that allows a passenger on the riding part to perform agricultural work by changing the vertical height of the upper end of the rear support part. A field work machine configured to be switchable between the storage position and the storage position. A pair of left and right rear support portions,
A pair of left and right steps for getting on and off the passenger from the left right side to the boarding section;
2. The field work machine according to claim 1, wherein the pair of left and right rear support parts are located rearward of the machine body with respect to the step for getting on and off and inside the machine body with respect to both left and right ends of the working device. The rear support portion includes a first support portion that is provided upright on a rear portion of the traveling machine body, and a second support that extends above the first support portion and that can change a height position with respect to the first support portion. And a holding mechanism that is provided on the first supporting portion and that can hold the second supporting portion in position,
The vertical working machine according to claim 1 or 2, wherein a vertical height of the holding mechanism is lower than an upper end portion of the working device when the working device is most raised. The field work machine according to any one of claims 1 to 3, wherein a satellite positioning unit capable of detecting a position of the traveling machine body by using a navigation satellite is provided in the connecting portion. The satellite positioning unit is located below the upper end of the front support part, with the canopy being switched to the storage position, the connecting part being swung downward. The field work machine described in 4. The field work machine according to claim 4 or 5, wherein a vertical height of an upper end of the canopy at the working position is higher than an upper end of the satellite positioning unit. The canopy is configured to be switchable to a simple storage position which has a vertical height at which an occupant riding on the riding section can work and is lower than the working position.
The field work machine according to any one of claims 4 to 6, wherein a vertical height of an upper end of the canopy in the simple storage position is lower than an upper end of the satellite positioning unit.

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