JP7058614B2 - 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 seedling transplanting machine as an example of a field work machine, and the seedling transplanting machine has a canopy (“visor part” in the document) that covers the upper part of a boarding part (the area of the “control seat” in the document). It is prepared. The canopy is supported by a support portion (“umbrella shaft” and “cylindrical mounting portion” in the literature), and this support portion is held by a holding mechanism (“visor holding member” in the literature) so as to be vertically expandable and contractible.

Japanese Unexamined Patent Publication No. 2017-6075

By the way, the support structure of the canopy disclosed in Patent Document 1 is configured to be expandable and contractible by inwardly fitting the umbrella shaft shown in the document into the cylindrical mounting portion. With this configuration, the support portion can be expanded and contracted. In order to lengthen the range, the longitudinal direction of the tubular mounting portion needs to be formed as linearly as possible, so that the shape of the tubular mounting portion is restricted. That is, even if the shape of the tubular mounting portion is not linear, if the umbrella shaft portion has a stretchable canopy support structure, the degree of freedom in the shape of the tubular mounting portion is high.

An object of the present invention is to provide a field work machine having a canopy having a high degree of freedom in the shape of a support portion and capable of changing the vertical position.

The field work machine according to the present invention includes a traveling machine capable of traveling in a field, a working device capable of working on a field, a boarding portion provided on the traveling machine over the width of the traveling machine, and the traveling machine. A first support portion erected from the rear portion, a second support portion that can extend above the first support portion, and a second support portion that can be provided on the first support portion and can hold the position of the second support portion. A holding mechanism and a canopy that is mounted and supported on the second support portion and covers the boarding portion from above are provided, and a plurality of canopies are arranged in the second support portion in the longitudinal direction of the second support portion. It is characterized in that an engaging protrusion is provided, and the holding mechanism is formed with an engaging recess that can be engaged with the engaging protrusion.

According to the present invention, the canopy is supported by a series structure of the first support portion and the second support portion, and the relative vertical height of the second support portion with respect to the first support portion is the height of the plurality of engaging protrusions. It is configured so that it can be changed depending on which one engages with the engaging recess. Since the engaging protrusion protrudes from the second support, if the engaging protrusion is configured to be able to engage with the engaging recess, the first support and the second support will be fitted to each other. It doesn't have to be. Therefore, the degree of freedom in the shapes of the first support portion and the second support portion is higher than that in the configuration in which the first support portion and the second support portion are fitted to each other. As a result, a field work machine having a canopy that has a high degree of freedom in the shape of the support portion and can change the vertical position is realized.

In the present invention, the holding mechanism is provided with a first locking pin capable of locking the second support portion, and the first locking pin penetrates the holding mechanism and the second support portion, respectively. It is preferable that a possible through hole is formed.

According to this configuration, through holes are formed in each of the holding mechanism and the second support portion, and the holding mechanism is configured so that the first locking pin can be inserted into these through holes. By inserting the first locking pin into the through hole while the engaging protrusion and the engaging recess are engaged, the engaged state between the engaging protrusion and the engaging recess is maintained, and the first The relative vertical height of the second support with respect to the support is firmly maintained. As a result, the vertical height of the canopy is firmly maintained.

In the present invention, the traveling machine is provided with a driving portion capable of driving the traveling machine, and a bonnet having an inclined surface inclined backward and accommodating the driving portion, and the front end portion of the canopy. Is preferably located in front of the upper end of the inclined surface.

The bonnet of a field work machine is often located in front of the boarding area. In this configuration, the front end of the canopy extends to the inclined surface of the bonnet on the front side of the boarding section. In other words, since the canopy is extended as long as possible to the part in front of the boarding area, the canopy can reduce the sunlight in the front view of the aircraft as much as possible. In addition, since the front end of the canopy is located in front of the upper end of the inclined surface, even if it rains and rainwater drips from the front end of the canopy, the rainwater falls on the inclined surface and inclines. It is swept forward along the surface. Therefore, the possibility that the boarding portion gets wet with rain is reduced.

In the present invention, a locking mechanism capable of locking the canopy is provided on the upper portion of the second support portion, and the canopy is provided with a locked member capable of engaging with the locking mechanism. Suitable.

According to this configuration, the canopy is supported by the second support portion by the engagement between the locking mechanism and the locked member. Therefore, by disengaging the locking mechanism from the locked member, the canopy can be attached to and detached from the second support portion, and the degree of freedom of the canopy support structure is increased. Further, when the operator changes the relative vertical height of the second support portion with respect to the first support portion, the engagement of the locking mechanism and the locked member is disengaged so that the second support portion can be changed. The work of changing the vertical height is performed smoothly without being disturbed by the canopy.

In the present invention, the locked member is connected downward to the canopy, and the locked member is recessed in the locking mechanism in a U-shape in the vertical direction and has a recess on which the locked member can be placed and supported. It is preferable that it is formed.

With this configuration, since the locked member can enter the recess of the locking mechanism, the possibility of misalignment between the locked member and the locking mechanism is reduced.

In the present invention, the locking mechanism is provided with a second locking pin capable of locking the locked member.
It is preferable that each of the locking mechanism and the locked member is formed with a through hole through which the second locking pin can penetrate.

According to this configuration, through holes are formed in each of the locking mechanism and the locked member, and the locking mechanism is configured so that the second locking pin can be inserted into these through holes. The second locking pin is inserted into the through hole in a state where the locked member and the locking mechanism are engaged, so that the locking mechanism firmly locks the locked member. This allows the canopy to be firmly supported by the second support.

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 front view which shows the boarding part and the peripheral part in a passenger-type rice transplanter. It is a perspective view which shows the part of the 1st spare seedling stand and the 2nd spare seedling stand. It is a right side view of the machine | body which shows the support structure of the spare seedling stand unit which has the 2nd spare seedling stand. It is a front view which shows the support structure on the free end side in the spare seedling stand unit which has the 2nd spare seedling stand. It is a rear view which shows the support structure of the base end side in the spare seedling stand unit which has the 2nd spare seedling stand. It is a top view which shows the passenger-type rice transplanter which has a canopy. It is a left side view of the machine which shows the passenger-type rice transplanter when the canopy is a simple storage position. It is a left side view of the machine which shows the passenger-type rice transplanter when the canopy is a storage position. It is a left side view of the machine body which shows the holding mechanism. It is a front view which shows the holding mechanism. It is a left side view of the airframe which shows the locking mechanism and the locked member. 13 is a cross-sectional view taken along the line XIV-XIV of FIG. 13 showing a locking mechanism and a locked member. It is a bottom view which shows an example of the structure of the hood part in 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 side of the traveling machine C, the arrow "B" is the rear side of the traveling machine C, the arrow "L" is the left side of the traveling machine C, and the arrow "R". Is the right side of the traveling machine C.

As shown in FIGS. 1 and 2, 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 operation 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, a known HST (Hydraulic Static Transmission, not shown) is provided on the steering wheel 10, the rear wheel 11, or both as a transmission mechanism 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 aircraft C and is configured so that the passenger can take a seat. 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 50, which will be described later, is provided above the boarding section 25.

The left and right sides of the bonnet 12 in the traveling machine C are provided with a foldable first spare seedling stand 31 having rails and a spare seedling stand unit 40 described later. The first spare seedling stand 31 and the spare seedling stand unit 40 are configured so that spare seedlings for replenishing the seedling planting device W can be placed. A pair of left and right first frames 32 are provided on the left and right side portions of the bonnet 12 in the traveling machine body C. The first frame 32 is erected on the front portion of the traveling machine body C.

The first frame 32 is a rod-shaped member formed in a U shape, and a pair of first vertical support rods are formed on the first frame 32. The first frame 32 is formed in a U shape by bifurcating a pair of first vertically oriented support rods from the upper end portion of the first frame 32 downward. The first frame 32 supports the first spare seedling stand 31 and the spare seedling stand unit 40.

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 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 of extending upward from the upper end portion of the first frame 32 and a state extending downward from the upper end portion of the first frame 32 due to the swing of the connecting portion 33. .. In this way, the connecting portion 33 is configured to be swingably connected and supported on the upper part of the first frame 32 and to be able to swing the free end portion up and down.

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 spare nursery unit]
As shown in FIGS. 1 to 4, the first preliminary seedling mounting table 31 has three foldable mounting tables, and the three mounting tables are connected side by side in the front-rear direction. The first preliminary seedling pedestal 31 is configured to be foldable by stacking the front pedestal and the rear pedestal on the pedestal in the front and rear center with respect to the pedestal in the front and rear center. The front mounting table is configured to swing back and forth around the swing fulcrum on the front side of the front and rear center mounting table, and the rear mounting table swings back and forth around the rocking fulcrum on the rear side of the front and rear center mounting table. It is configured to be movable. As a result, the first preliminary seedling mounting table 31 is extended back and forth during use, and the first preliminary seedling loading table 31 is in a usable state in which mat-shaped seedlings, seedling boxes, seedling rake boards, etc. can be placed. In this way, the first spare seedling mounting table 31 is supported by the front part of the traveling machine C, and is in a used state in which the seedlings can be placed by extending in the front-rear direction and in a folded state in which the seedlings cannot be placed by folding. It is configured so that it can be switched to and.

In the left side view of the machine shown in FIG. 1, the operator swings the rear mounting table clockwise and the front mounting table counterclockwise, so that the first preliminary seedling mounting table 31 Is configured to be switchable from the folded state to the used state. However, the spare seedling stand unit 40 in the used state is located above the mounting table in the center of the front and rear, and the spare seedling stand unit 40 and the mounting table in the center of the front and rear of the first spare seedling stand 31 overlap in a plan view. With the first preliminary seedling mounting table 31 folded, the front mounting table and the rear mounting table are stacked on the front and rear center mounting tables. 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 spare seedling stand unit 40, and the worker is the first reserve. There is a risk that the seedling stand 31 cannot be switched to the used state. In order to avoid such inconvenience, the spare seedling stand unit 40 is configured to be swingable around the vertical axis V in the vertical direction with respect to the first frame 32.

The spare seedling stand unit 40 has a plurality of second spare seedling stand 41, a second frame 42, a locking support portion 43, and a swing support portion 44.

As shown in FIGS. 3 and 4, a plurality of second preliminary seedling stands 41 are supported by the second frame 42 in a state of being arranged vertically. Note that FIG. 4 shows the second spare seedling loading table 41, the second frame 42, and the like on the right side of the machine body. A pair of second vertical support rods are formed on the second frame 42. The second frame 42 is a rod-shaped member formed in a U shape by bifurcating a pair of second vertical support rods downward from the upper end portion, and both sides of the pair of second vertical support rods. The second spare seedling stand 41 is supported at each of the two locations. In the front-back direction, the second frame 42 cantileverly supports the second spare seedling mounting table 41. Although not described in detail, each of the second spare seedling pedestals 41 is configured to be able to swing up and down with respect to the second frame 42 around the axis in the front-rear direction. The mounting surface of the second spare seedling stand 41 is aligned with the horizontal direction in a state where the second spare seedling stand 41 swings to the lowermost side. In this state, the second spare seedling mounting table 41 can mount a mat-shaped seedling, a seedling box, a seedling rake board, or the like.

As shown in FIGS. 4 and 5, the locking support 43 is supported by the first vertical support rod at the front of the pair of first vertical support rods of the first frame 32, and is supported by the swing support portion. 44 is supported by the rear first vertical support rod of the pair of first vertical support rods of the first frame 32. It should be noted that FIGS. 5 to 7 show a locking support portion 43, a swing support portion 44, and the like in the first frame 32 on the right side of the machine body. As shown in FIGS. 5 and 7, the swing 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 vertically oriented shaft cores having the same shaft core. It has a cylindrical hole along V. A pair of vertical swing connecting portions 42A and 42A are provided on the second vertical support rod at the rear of the machine body among the pair of second vertical support rods in the second frame 42 formed in a U shape, and a pair of rocking joints 42A and 42A are provided. The dynamic connecting portions 42A and 42A are swingably supported by the swing support portion 44 via a pair of fulcrum pins 46 and 46. For this reason, of the pair of second vertical support rods in the second frame 42, the second vertical support rod at the rear of the machine body is the swing base end portion. Therefore, the second spare seedling mounting table 41 is configured to be swingable around the vertical axis V. The fulcrum pin 46 is formed in a columnar shape.

One swing connecting portion 42A is provided with a pair of upper and lower horizontal plane portions capable of contacting 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, through holes are formed in each of the pair of upper and lower horizontal plane portions in each of the pair of upper and lower swing connecting portions 42A and 42A, and each of these through holes overlaps in a plan view.

The upper swing connecting portion 42A in the second frame 42 and the shaft core hole portion 44A can be in contact with each other. Further, the lower swing connecting portion 42A of the second frame 42 and the shaft core hole portion 44B can be in contact with each other. Then, in a state where they are in contact with each other, the through holes in the pair of swing connecting portions 42A and 42A and the cylindrical holes in the pair of upper and lower shaft core hole portions 44A and 44B overlap each other in a plan view. do. Then, when the fulcrum pin 46 penetrates through these holes, the pair of swinging connecting portions 42A and 42A and the pair of upper and lower shaft core hole portions 44A and 44B are swingably connected.

A horizontal plane is formed at the upper end of the fulcrum pin 46, and this horizontal plane extends outward from the cylindrical portion of the fulcrum pin 46. Then, a hole through which the bolt 46a can be inserted is formed in this horizontal plane. A bolt 46a is inserted through this hole, and the bolt 46a is bolted to the swing connecting portion 42A, whereby the fulcrum pin 46 and the swing connecting portion 42A are connected. As a result, the upper fulcrum pin 46 is connected and fixed 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 connected to the swing connecting portion 42A and the shaft core hole portion 44B. On the other hand, it is connected and fixed so that it will not come off.

As shown in FIGS. 5 and 6, a pair of upper and lower locking portions 43A and 43B are provided on the locking support portion 43. The pair of locking portions 43A and 43B are formed in a C shape in front view or 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 inserted in the vertical direction. 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 so that the rod-shaped portion of the hook member 45 can be inserted vertically in the intermediate surface portion 43C as well. The vertically facing coil spring 47 and the washer 48 are inserted side by side in the space between the upper surface portion and the intermediate surface portion 43C in the locking portion 43B. The washer 48 is arranged below the coil spring 47.

Of the pair of second vertical support rods in the second frame 42 formed in a U shape, the second vertical support rod at the front of the machine, that is, the free end portion has a pair of upper and lower locked members 42B, 42B. It is provided. That is, on the other end side of the pair of second vertical support rods, a pair of upper and lower locked members 42B and 42B that can correspond to the pair of upper and lower locking portions 43A and 43B are provided. A through hole corresponding to the through hole of each of the locking portions 43A and 43B is formed in each of the upper and lower pairs of locked members 42B and 42B.

Of the lower surface portions of the locking portions 43A and 43B, an extending inclined surface is formed at the end portion on the lateral outer side of the machine body. These extending inclined surfaces are inclined downward toward the lateral side of the aircraft in the lateral direction of the aircraft. When the free end portion of the second frame 42 is swung to the side where the locking support portion 43 is located, the locked member 42B and the locking support portion 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 and supported by the swing support portion 44. At this time, the locked members 42B and 42B are also displaced downward, but even in this case, the extended inclined surface formed on the lower surface of each of the locking portions 43A and 43B and the locked member 42B. , 42B come into contact with each other. Then, the locked members 42B and 42B are integrally lifted from the free end portion of the second frame 42 by these extending 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 in the locking portion 43A, and the lower side is inserted into the space between the intermediate surface portion 43C and the lower surface portion in 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 each other in a plan view. Then, the rod-shaped portion of the hook member 45 is inserted into these through holes in the vertical direction, so that the locked members 42B and 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 the locking support portions 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 to the first frame 42. 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, on the other end side of the pair of first vertical support rods in the first frame 32, 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. Has been done. 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 laterally and laterally of the machine body integrally with the second spare seedling stand 41.

As shown in FIGS. 1 to 3, the second preliminary seedling loading table 41 is directly above the first preliminary seedling loading table 31 in a state where the locked members 42B and 42B are locked to the locking support portion 43. Located in. As shown in FIG. 4, the second spare seedling stand 41 is the first spare in a state where the second spare seedling stand 41 is swung toward the rear side of the machine body around the vertical axis V together with the second frame 42. It is not located directly above the seedling stand 31. When the passenger gets on and off at the boarding section 25, the space above the boarding / alighting step 35 is secured by the configuration in which the second spare seedling loading platform 41 is located directly above the first preliminary seedling loading platform 31. , The risk of the passenger feeling cramped is reduced. Further, the second preliminary seedling loading platform 41 is not located directly above the first preliminary seedling loading platform 31 in a state where the second preliminary seedling loading platform 41 is swung toward the rear side of the machine body. Therefore, even when the seedlings are placed on the second spare seedling stand 41 while the first spare seedling stand 31 is folded, the worker is placed on the second spare seedling stand 41. The first spare seedling stand 31 can be expanded to use without removing the seedlings.

Since the passenger-type rice transplanter, which is an example of a field work machine, has a slightly forward leaning 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 spare seedling stand 41 are unlikely to swing freely. Further, the second frame 42 and the second spare seedling stand 41 are located on the side where the center of the front and rear of the machine is located in the front and rear direction of the machine when swinging to the swing end point on the side opposite to the side where the locking support portion 43 is located. It can swing to the side where the center of the left and right sides of the machine is located in the left and right direction of the machine. Therefore, for example, when the worker stores the field work machine, the second frame 42 and the second spare seedling stand 41 are swung to the end on the side 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 loading platform 31 and the second preliminary seedling loading platform 41 are realized in which the ease of seedling replenishment work and the storage capacity of seedlings are compatible.

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 region of the region 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 located above the insertion hole. As a result, the snap pin 45a and the washer 48 come into contact with each other, and as the hook member 45 slides upward, the coil spring 47 and the washer 48 are pushed upward. The coil spring 47 is compressed by the upper surface portion of the locking portion 43B and the washer 48, and a downward urging force acts on the washer 48 and the snap pin 45a. As a result, the hook member 45 is urged to slide downward, and if the hook member 45 is not manually operated, the hook member 45 penetrates through the through holes in the pair of locking portions 43A and 43B, respectively. The position is held in the state of the hook. In other words, if the hook member 45 is not manually operated, the hook member 45 is held in a position capable of penetrating the through holes in the swing connecting portions 42A and 42A, respectively.

In this way, the hook member 45 is hooked on the pair of upper and lower locking portions 43A and 43B and the pair of upper and lower locked members 42B and 42B, so that the upper and lower pair of locking portions 43A and 43B and the upper and lower hook members 45 are hooked. It is configured to be able to hold the locked state with the pair of locked members 42B, 42B.

The connection support structure of the locking support portion 43 with respect to the first frame 32 will be described with reference to FIGS. 4, 5 and 6. Of the locking support portion 43, the portion connected to the first frame 32 is formed in a U shape in a plan view, and the locking support portion 43 is connected and supported by the first frame 32. The first frame 32 is sandwiched in the space surrounded by the U-shape in 43. Locking portions 43A and 43B are provided at the U-shaped base end portion of the locking support portion 43, and a pair of U-shaped tip portions are directed from the U-shaped base end portion toward the side where the swing support portion 44 is located. And postpone. In the locking support portion 43, bolt insertion holes are formed at the upper and lower center portions of the pair of plate-shaped members extending from the U-shaped base end portion toward the U-shaped tip portion. Further, among these pair of bolt insertion holes, nuts are welded and fixed at locations on the lateral outer side of the machine body. Such a weld-fixed nut is hereinafter referred to as a "welded nut".

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

In the locking support portion 43, the upper and lower portions of the pair of plate-shaped members at the U-shaped tip portions bulge toward the position of the swing support portion 44 from the upper and lower center 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 bulging portions, and welding nuts are provided in the laterally outer portions of the machine body among these bolt insertion holes. Cylindrical spacers 43E and 43E are inserted over the pair of bolt insertion holes in the upper and lower bulging points, and bolts 43F and 43F are inserted into the spaces inside the cylinder in the pair of upper and lower spacers 43E and 43E. To. Then, the bolts 43F and 43F are fastened to the upper and lower welding nuts on the lateral outer side of the machine body, respectively. The pair of upper and lower spacers 43E and 43E prevent excessive tightening of the bolts 43F and 43F, and the spacing between the pair of U-shaped tips is maintained by the spacing of the spacers 43E.

In this way, the locking support portion 43 sandwiches the first frame 32 with a pair of plate-shaped members extending from the U-shaped base end portion on the U-shaped tip end side. As a result, the locking support portion 43 is firmly connected and supported to the first frame 32.

A connection support structure of the swing support portion 44 with respect to the first frame 32 will be described with reference to FIGS. 4, 5 and 7. Of the swing support portion 44, the portion connected to the first frame 32 is formed in a U shape in a plan view, and the swing support portion 44 is connected and supported by the first frame 32. The first frame 32 is sandwiched in the space surrounded by the U-shape in 44. Axial core holes 44A and 44B are provided at the U-shaped base end portion of the swing support portion 44, and a pair of U-shaped tip portions face the locking support portion 43. In the swing support portion 44, bolt insertion holes are formed at the upper and lower center portions of the pair of plate-shaped members extending from the U-shaped base end portion toward the U-shaped tip portion. Further, among these pair of bolt insertion holes, welding nuts are provided at locations on the lateral outer side of the machine body.

Although not shown, a bolt insertion hole is formed in the rear first vertical support rod of the pair of first vertical support rods in the first frame 32, and this bolt insertion hole is the first vertical support rod. Penetrates in the lateral direction of the aircraft. The bolt 44E is inserted into the bolt insertion hole in the first vertical support rod and the bolt insertion hole at the upper and lower center points of the swing support portion 44, and the bolt 44E is fastened to the welding nut on the lateral side of the machine body.

In the swing support portion 44, the upper and lower portions of the pair of plate-shaped members at the U-shaped tip portions bulge toward the position of the locking support portion 43 from the upper and lower center 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 bulging portions, and welding nuts are provided in the laterally outer portions of the machine body among these bolt insertion holes. Cylindrical spacers 44C and 44C are inserted over the pair of bolt insertion holes in the upper and lower bulging points, and bolts 44D and 44D are inserted into the spaces in the cylinder in the pair of upper and lower spacers 44C and 44C. To. Then, the bolts 44D and 44D are fastened to the upper and lower welding nuts on the lateral outer side of the machine body, respectively. The pair of upper and lower spacers 44C, 44C prevents excessive tightening of the bolts 44D, 44D, and the spacing between the pair of U-shaped tips is maintained by the spacing of the spacers 44C.

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

[About the configuration of the canopy]
As shown in FIGS. 1, 3, 8 to 10, a canopy 50 is provided above the boarding section 25. A pair of swinging pivots 51, 51 are swingably connected to two left and right positions in the front portion of the canopy 50. A pair of swinging pivots 51, 51 are fitted on the left and right ends of the upper part of the connecting portion 33. As a result, the canopy 50 is configured to be able to swing around the pair of swing pivots 51, 51.

A pair of rear support portions are erected from the left and right ends of the rear portion of the traveling machine body C. The rear support portion has a first support portion 54B and a second support portion 54A. The pair of left and right first support portions 54B and second support portions 54A 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. The first support portion 54B is erected at the rear portion of the traveling machine body C. As a result, the canopy 50 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, a pair of left and right first support portions 54B and second support portions 54A are located inside the machine body from the left and right end portions of the seedling planting device W. Therefore, the first support portion 54B and the second support portion 54A are in the field as compared with the configuration in which the first support portion 54B and the second support portion 54A are located outside the machine body from the left and right ends of the seedling planting device W. The risk of contact with obstacles, etc. is reduced.

The second support portion 54A is configured to extend above the first support portion 54B and is configured to be able to change the height position with respect to the first support portion 54B. A holding mechanism 55 is provided at the upper end of the first support portion 54B, and the holding mechanism 55 is configured to be able to hold the position of the second support portion 54A. The second support portion 54A and the first support portion 54B are connected to each other in a state of extending vertically via a holding mechanism 55. As a result, the second support portion 54A is configured so that the vertical height of the upper end can be changed.

A pair of locked members 53, 53 are connected to each of the left and right ends in the region near the rear of the canopy 50, and the portion of the locked member 53 in the canopy 50 is supported by the second support portion 54A. The pair of first support portions 54B and 54B 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 vertical height of the holding mechanism 55 is lower than the upper end of the seedling planting device W when the seedling planting device W as a working device is raised to the maximum. Therefore, even when the worker works on the seedling planting device W, the holding mechanism 55 does not easily interfere with the work for the worker.

In this way, the canopy 50 is supported by the connecting portion 33 and mounted and supported by the pair of second supporting portions 54A, and covers the boarding portion 25 from above. Further, the connecting portion 33 is also used 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 frame 50A is provided on the left side of the machine body, and the front outer frame frame 50B is provided on the right side of the machine body. These frames may be made of metal or may be made of a resin such as polyvinyl chloride.

The front outer frame frames 50A and 50B and the rear outer frame frame 50C are rod-shaped members formed by bending, and are formed so as 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 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 the 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 to the lateral side of the fuselage and to the rear side of the fuselage from this connecting portion, and the end portions of the front outer frame frames 50A and 50B on the rear side of the fuselage are directed to the rear of the fuselage.

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

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 and 52 may be integrally configured. Is also good. Further, the front outer frame frames 50A and 50B may be configured to be expandable and contractible with respect to the rear outer frame frame 50C.

Each of the front horizontal frame 50D and the rear horizontal frame 50E is a rod-shaped member extending 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 the front-rear intermediate points of the front outer frame frames 50A and 50B, respectively. Both ends of the rear lateral frame 50E are connected to the respective intermediate portions in the front-rear direction of the U-shaped forward extending region in the rear outer frame 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 and 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 longitudinal intermediate portion of the front horizontal frame 50D, respectively. The mirror 57 is supported on the first front and rear frame 50F. The mirror 57 is used by the passenger to check the rear of the traveling aircraft C, and the passenger can confirm the rear of the aircraft through 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 cross section of the second front-rear frame 50G is formed so as to be smaller than the cross sections of the front outer frame frames 50A and 50B and the cross section of the rear outer frame frame 50C. Has been done. The three second front and rear frames 50G, 50G, and 50G are arranged side by side in the lateral direction of the fuselage. Both ends of each of the three second front and rear frames 50G, 50G, and 50G are connected to the front horizontal frame 50D and the rear end portion of the rear outer frame frame 50C, respectively.

Then, inside the outer frame of the canopy 50, the flexible hood 58 is covered from above, so that the canopy 50 covers the boarding portion 25. 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 boarding portion 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 portion of the canopy 50 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 50, the rainwater falls on the bonnet 12 and slides forward along the inclined surface, and the steering handle 27 and steering at the boarding portion 25 are steered. The risk of rainwater dripping onto various meter devices on the front side of the handle 27 is reduced.

The pair of left and right swing pivots 51, 51 are connected to the front outer frame frame 50A and the front outer frame frame 50A, respectively. The pair of swinging pivots 51 and 51 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 51 and 51. In the present embodiment, the front end portion of the front outer frame frames 50A and 50B, that is, the connection portion between the front outer frame frame 50A and the front outer frame frame 50B is more than the front end portion in the front-rear direction of the front outer frame frames 50A and 50B. 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 with the satellite positioning unit 34 in the front-rear direction. Therefore, if the canopy 50 swings around the pair of swing pivots 51, 51, there is a possibility that the front outer frame frames 50A, 50B and the satellite positioning unit 34 interfere with each other. In order to avoid this inconvenience, the connection point between the front outer frame frame 50A and the front outer frame frame 50B is located behind the front end portions of the front outer frame frames 50A and 50B in the front-rear direction. The frames 50A and 50B are configured. As a result, a recessed space S is formed at the center of the left and right at the front end 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 swing pivots 51, 51, the connection point between the front outer frame frame 50A and the front outer frame frame 50B is behind the satellite positioning unit 34. Swing with. Therefore, 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 on the left side of the machine body of the rear outer frame frame 50C, which is closer to 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 portion on the right side of the machine body of the rear outer frame frame 50C, which is closer 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 front extending region in the U-shape of the rear outer frame frame 50C.

As shown in FIGS. 1, 3, 9 and 10, the height of the canopy 50 is configured to be adjustable in multiple stages. Specifically, a holding mechanism 55 is provided at the upper end 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 engaging 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 in which the lateral inner side of the machine body opens in a plan view, and an engaging recess 55k is formed at the lateral inner end portion of the U-shaped machine body. The engaging recess 55k and the engaging protrusions 54C, 54D, 54E can be engaged with each other, depending on which of the engaging protrusions 54C, 54D, 54E engages with the engaging recess 55k. The vertical height of the canopy 50 changes. In this way, the second support portion 54A is provided with a plurality of engaging protrusions 54C, 54D, 54E protruding from the surface of the second support portion 54A in a state of being lined up in the longitudinal direction of the second support portion 54A, and a holding mechanism is provided. An engaging recess 55k that can be engaged with the engaging protrusions 54C, 54D, 54E is formed in the 55.

In the embodiment shown in FIG. 1, the engaging protrusion 54C and the engaging recess 55k are engaged with each other. In this state, the canopy 50 inclines backward toward the rear side. The vertical height of the upper end portion of the canopy 50 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. That is, if the height of the canopy 50 shown in FIG. 1 is the vertical height, the passengers who board the boarding section 25 can perform farm work. 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. 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 rear rising inclined surface of the bonnet 12. Therefore, even when rainwater falls on the canopy 50, the rainwater is guided to the front end portion of the canopy 50 and drips from the front end portion of the canopy 50 onto the rear rising inclined surface of the bonnet 12.

The upper end of the canopy 50 is the rear end of the canopy 50 with the canopy 50 tilted backwards. The front end portion of the canopy 50 is the swing base end portion of the canopy 50. Therefore, even if 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 relative vertical position between the front end of the canopy 50 and the satellite positioning unit 34 is smaller than the amount of change in the relative vertical position between the rear end of the canopy 50 and the satellite positioning unit 34. Since the rear end of the canopy 50 is the farthest part of the canopy 50 from the satellite positioning unit 34, the positioning accuracy of the satellite positioning unit 34 is ensured, and the passenger's work space in the vertical direction is secured. ..

In the embodiment shown in FIG. 9, the engaging protrusion 54D and the engaging recess 55k engage with each other. In this state, the canopy 50 becomes 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 that of the upper end of the satellite positioning unit 34. Therefore, if the height of the canopy 50 shown in FIG. 9 is the vertical height, the passengers who board the boarding section 25 can perform farm work while the canopy 50 is located lower than the above-mentioned working position. Further, since the vertical height of the upper end of the canopy 50 is lower than that of the upper end of the satellite positioning unit 34, the satellite positioning unit is more than the case where the vertical height of the canopy 50 is set to the working position. It is easy to sufficiently secure the positioning accuracy of 34. 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 engaging protrusion 54E and the engaging recess 55k are engaged with each other, and the canopy 50 is inclined backward toward the rear side. The vertical height of the upper end of the canopy 50 is higher than that of the upper end of the satellite positioning unit 34. At the vertical height of the canopy 50 at this time, it is impossible for the passengers who boarded the boarding section 25 to carry out farm work. In this embodiment, this position is referred to as a "storage position".

In this way, the canopy 50 has a working position that is a vertical height at which the passengers boarding the boarding section 25 can perform farm work by changing the vertical height of the upper end of the second support portion 54A, and the boarding section 25. It is configured to be switchable between a simple storage position that is vertically high enough for the passengers on board to work and is located lower than the work position, and a storage position that is lower than the simple storage position.

[About the 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, a first through hole 55d, a second through hole 55e, and protrusions 55f and 55f are formed on the first locking pin 55A. The first locking pin 55A is configured to be slidable in the front-rear direction of the machine 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 of the first locking pin 55A where the first through hole 55d and the tip 55g are located faces the rear of the machine, but the end where the first through hole 55d and the tip 55g are located is the machine. The first locking pin 55A may be configured to face forward. The intermediate portion in the longitudinal direction between both ends of the U-shape of the first locking pin 55A is located on the side opposite to both ends of the U-shape with the support hole 55j interposed therebetween in the front-rear direction of the machine body. The protrusions 55f and 55f are located on the front side of the machine body with respect to the support holes 55j, and project to the outer diameter side with respect to the inner diameter of the support holes 55j. The slide member 55B is fitted onto 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 protrusion 54C, the through hole 54g is located directly above the engaging protrusion 54D, and the through hole 54h is located directly above the engaging protrusion 54E.

With the engaging protrusion 54C and the engaging recess 55k engaged, the through hole 55i and the through hole 54f overlap each other in the front-rear direction. 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 54f, so that the first locking pin 55A can lock the second support portion 54A. ..

With the engaging protrusion 54D and the engaging recess 55k engaged, the through hole 55i and the through hole 54g overlap each other in the front-rear direction. 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. ..

With the engaging protrusion 54E and the engaging recess 55k engaged, the through hole 55i and the through hole 54h overlap each other in the front-rear direction. 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 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 holes 55i, the operator positions the slide member 55B at the support hole 55j rather than the second through hole 55e. Slide it 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 protrusions 55f and 55f. With this configuration, the tip portion 55g cannot be removed from the through hole 55i and the through hole 54f, and the second support portion 54A is locked to the first locking pin 55A. As described above, through holes 54f, 54g, 54h, 55i through which the first locking pin 55A can penetrate are formed in each of the holding mechanism 55 and the second support portion 54A.

With the second support portion 54A locked to the first locking pin 55A, when the operator removes the snap pin 55C from the second through hole 55e and inserts the snap pin 55C into the first through hole 55d, it slides. The member 55B is slidable in a region between a portion that abuts the support hole 55j and a portion that abuts the snap pin 55C inserted in the first through hole 55d. Along with this, the first locking pin 55A includes a portion where the support hole 55j and the protrusions 55f and 55f come into contact with each other, and a snap pin 55C in which the slide member 55B is inserted into the support hole 55j and the first through hole 55d. It is possible to slide in the front-back direction over the area between the part sandwiched between the two. Therefore, when the first locking pin 55A slides to the side where the protrusions 55f and 55f are separated from the support hole 55j, the tip end portion 55g comes out of the through hole 55i and the through hole 54f, and the second support portion 54A is separated from the through hole 55i. The locked state of 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.

[About the locking mechanism of the canopy]
As shown in FIGS. 3, 13 and 14, a locking mechanism 56 capable of locking the canopy 50 is provided at the upper end of the second support portion 54A, and the canopy 50 can be engaged with the locking mechanism 56. A locked member 53 is provided. The upper end portion of the second support portion 54A is formed by bending from upward to the laterally inward direction of the machine body. Although not described in detail, the locking mechanism 56 is swingably supported around the lateral axis center at the laterally inwardly facing end portion of the second support portion 54A.

The locking mechanism 56 has a U-shaped second locking pin 56A, a slide member 56B, and a snap pin 56C. Further, the first through hole 56d, the second through hole 56e, and the protrusions 56f and 56f are formed on the second locking pin 56A. The second locking pin 56A is configured to be slidable in the front-rear direction of the machine along the support hole 55j of the locking mechanism 56, and the first through hole 56d and the tip portion 56g are formed at both ends of the U-shape 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 laterally outward of the machine body, but the end portion where the first through hole 56d and the tip portion 56g are located is located. The second locking pin 56A may be configured so as to face laterally inward of the machine body. The intermediate portion in the longitudinal direction between both ends of the U-shape of the second locking pin 56A is located on the side opposite to both ends of the U-shape with the support hole 56j interposed therebetween in the front-rear direction of the machine body. The protrusions 56f and 56f are located on the front side of the machine body with respect to the support holes 56j, and project to 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 with the upper side open in the front-rear direction view. 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 be able to mount and support the locked member 53.

A through hole 56i is formed in the locking mechanism 56. Further, a through hole 53i is formed in the locked member 53. In a state where the locked member 53 is 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 from the second through hole 56e to the side where the support hole 56j is located, and the second locking pin 56A is inserted. (2) The snap pin 56C is inserted through the 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 and 56f. With this configuration, the tip portion 56g is prevented from coming out of 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 and 56i through which the second locking pin 56A can penetrate are formed in the locking mechanism 56 and the locked member 53, respectively.

With the locked member 53 locked to the second locking pin 56A, 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, the slide is made. The member 56B is slidable in a region between a portion that abuts the support hole 56j and a portion that abuts the snap pin 56C inserted in the first through hole 56d. Along with this, the second locking pin 56A includes a portion where the support hole 56j and the protrusions 56f and 56f abut, and a snap pin 56C in which the slide member 56B is inserted into the support hole 56j and the first through hole 56d. It is possible to slide laterally over the area between the part sandwiched between the two. Therefore, when the second locking pin 56A slides to the side where the protrusions 56f and 56f are separated from the support hole 56j, the tip portion 56g comes out of the through hole 56i and the through hole 53i, and the second locking pin 56 with respect to the locked member 53. The locked state of the second locking pin 56A is released. 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 located directly above the locking mechanism 56 in a state where the vertical height of the canopy 50 is located at the working position or the simple storage position. Therefore, the locked member 53 enters the recess in the locking mechanism 56, and the locked member 53 is placed and supported on 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 even if the canopy 50 is blown by the wind, the vertical height of the canopy 50 is firmly maintained.

With the vertical height of the canopy 50 located at the storage position, the position of the locked member 53 shifts to the rear side of the machine body from the locking mechanism 56. Therefore, the front portion of the rear outer frame frame 50C or the fitting member 52 is inserted into the recess of the locking mechanism 56 instead of the locked member 53, and the rear outer frame frame 50C is mounted and supported on the locking mechanism 56. Will be done. In this state, the second locking pin 56A cannot lock the locked member 53, but when it is stored in a barn with a low ceiling, the canopy 50 is hardly fanned by the wind, so it is simply rearranged. It is sufficient that the outer frame frame 50C is mounted and supported on the locking mechanism 56. Even when the vertical height of the canopy 50 is located at the storage position, the second locking pin 56A may be configured to be able to lock the locked member 53. In this case, for example, the locked member 53 may be configured to be slidable with respect to the rear outer frame frame 50C.

[Another Embodiment]
The present invention is not limited to the configurations exemplified in the above-described embodiments, and the following, typical alternative embodiments of the present invention will be exemplified.

(1) In the above-described embodiment, the second support portion 54A is provided with three engaging protrusions 54C, 54D, 54E, but the present invention is not limited to this embodiment. For example, one of the engaging protrusions 54C, 54D, and 54E may not be provided.

Illustratively based on FIGS. 1, 9, and 10, the simple storage position shown in FIG. 9 may be the storage position, or may be configured so as not to be switched to the storage position shown in FIG. .. That is, the canopy 50 may be configured to be switchable only in two positions, the work 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 in two positions, the work 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 working position, or may be configured so as not to be switched to the working position shown in FIG. That is, the canopy 50 may be configured to be switchable only in two positions, the simple storage position as the work position shown in FIG. 9 and the storage position shown in FIG.

In short, the second support portion 54A may be provided with a plurality of engaging protrusions so as to be aligned in the longitudinal direction of the second support portion 54A.

(2) An example of the configuration of the hood 58 in 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 when viewed upward from the boarding seat 26 in FIG. 1). As described above, the outer frame of the canopy 50 is formed by the 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 of the hood 58 is locked to the lower surface of the hood 58 in a state of being wound inside the outer frame of the canopy 50.

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

In the embodiment illustrated in FIG. 15, the attractive force of the second locking portion 58B by the magnet is set to be weaker than the adhesive force of the first locking portion 58A by the hook-and-loop fastener. That is, for example, when the canopy 50 is blown by the wind and the hood 58 is subjected to wind pressure, the second locking portion 58B is configured so that the attraction of the magnet in the second locking portion 58B can be easily disengaged. Therefore, when the canopy 50 is blown by the wind, the winding of the outer peripheral end of the hood 58 with respect to the outer frame on the rear side of the canopy 50 is released, and the rear side of the hood 58 is swept by the wind. Further, since the hook-and-loop fastener of the first locking portion 58A firmly holds the wound state with respect to the outer frame on the front side of the canopy 50, the possibility that the hood 58 is blown by the wind is prevented. That is, in the embodiment shown in FIG. 15, the area of the hood 58 that receives wind pressure is reduced only to the front portion of the hood 58 due to the configuration in which only the rear portion of the hood 58 is blown by the wind. Therefore, it is possible to prevent the frame of the canopy 50 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. 15, even if only the portion of the second locking portion 58B corresponding to the pair of left and right corner portions in the rear outer frame frame 50C can be bonded by the hook-and-loop fastener. good. In this case, the adhesive force of the hook-and-loop fastener at the second locking portion 58B may be weaker than the adhesive force of the hook-and-loop fastener at the first locking portion 58A. Further, the adhesive force of the hook-and-loop fastener at the second locking portion 58B may be stronger than the attractive force of the magnet. With this configuration, the possibility that the magnets in the second locking portion 58B are frequently disengaged just by being fanned by a weak wind is reduced, and the canopy 50 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 portion of the hood 58 is swept by the wind.

(3) In the above-described embodiment, the holding mechanism 55 is formed with one engaging recess 55k that can be engaged with the engaging protrusions 54C, 54D, 54E, but the present invention is not limited to this embodiment. A plurality of engaging recesses 55k may be provided side by side in the vertical direction. For example, the two engaging recesses 55k and 55k may be configured to engage with two of the engaging protrusions 54C, 54D and 54E. In this case, the holding mechanism 55 may not be provided with the first locking pin 55A, the through hole 55i, or the support hole 55j. In short, the holding mechanism 55 may be configured to have an engaging recess 55k that can be engaged with the engaging protrusion.

(4) In the above-described embodiment, the rear support portions are composed of a pair of left and right, but the rear support portions do not have to be a pair of left and right. For example, one second support portion 54A and one first support portion 54B may be configured to be erected from the center of the left and right sides of the machine. 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) The engine 13 as the driving unit described above may be, for example, an electric motor.

(6) In the above-described embodiment, the front end portion of the canopy 50 is located in front of the upper end portion of the inclined surface of the bonnet 12, but the front end portion of the canopy 50 is the upper end portion of the inclined surface of the bonnet 12 in the front-rear direction. It may be in the same or substantially the same position as. The bonnet 12 has an inclined surface that inclines backward, but the bonnet 12 may have a configuration that does not have an inclined surface. Further, in the above-described embodiment, the bonnet 12 is located in front of the boarding section 25, but in the present invention, the workable spaces on both the left and right sides of the bonnet 12 are configured as a part of the boarding section 25. May be there.

(7) The engaging protrusions 54C, 54D, 54E in the above-described embodiment may be welded and fixed to the second support portion 54A, or may be inserted through the second support portion 54A as a pin. May be there.

(8) In the above-described embodiment, the canopy 50 is provided with a locked member 53 that can be engaged with the locking mechanism 56, but the canopy 50 is not provided with the locked member 53. Is also good. For example, the locking mechanism 56 may be configured to lock the canopy 50 in a state where the front outer frame frames 50A and 50B and the rear outer frame frame 50C are held in the U-shaped recesses of the locking mechanism 56. ..

(9) In the above-described embodiment, the locking mechanism 56 is formed with a recess that is recessed in a U shape in the vertical direction, but the locking mechanism 56 may not be formed with a recess.

(10) In the above-described embodiment, the locking mechanism 56 is provided with the second locking pin 56A, and the second locking pin 56A can penetrate through the locking mechanism 56 and the locked member 53, respectively. Holes 53i and 56i are formed, but the present invention is not limited to this embodiment. The locking mechanism 56 may be configured to lock the locked member 53 with, for example, a buckle or a magnet.

(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 is not limited to the above-described embodiment, and even if the vertical position of the canopy 50 is the storage position, the passengers boarding the boarding section 25 may be configured to perform some work. For example, in the hood 58 of the canopy 50, a portion located directly above the boarding seat 26 is configured to be openable and closable, and even if the vertical position of the canopy 50 is the storage position, the passenger can be seated in the boarding seat 26. As such, the canopy 50 may be configured. At this time, the rear outer frame frame 50C, the front lateral frame 50D, and the rear lateral frame 50E located directly above the boarding seat 26 may be detachably configured.

(13) The present invention can also be applied to a rice transplanter, a sowing machine, and a passenger management machine, and the field work machine of the present invention includes a rice transplanter, a sowing machine, and a passenger management machine.

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.

12: Bonnet 13: Engine (driving part)
25: Boarding part 50: Canopy 53: Locked member 53i: Through hole 54A: Second support part 54B: First support part 54C: Engagement protrusion 54D: Engagement protrusion 54E: Engagement protrusion 54f: Penetration Hole 54g: Through hole 54h: Through hole 55: Holding mechanism 55A: First locking pin 55i: Through hole 55k: Engagement recess 56: Locking mechanism 56A: Second locking pin 56i: Through hole 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 part erected from the rear part of the traveling machine and
A second support portion that can extend above the first support portion,
A holding mechanism provided on the first support portion and capable of holding the position of the second support portion,
A canopy that is mounted and supported on the second support portion and covers the boarding portion from above is provided.
A plurality of engaging protrusions are provided on the second support portion so as to be aligned in the longitudinal direction of the second support portion.
A field work machine in which an engaging recess that can be engaged with the engaging protrusion is formed in the holding mechanism. The holding mechanism is provided with a first locking pin capable of locking the second support portion.
The field work machine according to claim 1, wherein through holes through which the first locking pin can penetrate are formed in each of the holding mechanism and the second support portion. The traveling machine is provided with a driving portion capable of driving the traveling machine, and a bonnet having an inclined surface inclined backward and accommodating the driving portion.
The field work machine according to claim 1 or 2, wherein the front end portion of the canopy is located on the front side of the upper end portion of the inclined surface. A locking mechanism capable of locking the canopy is provided on the upper part of the second support portion.
The field work machine according to any one of claims 1 to 3, wherein the canopy is provided with a locked member that can be engaged with the locking mechanism. The locked member is connected downward with respect to the canopy.
The field work machine according to claim 4, wherein the locking mechanism is recessed in a U-shape in the vertical direction and has a recess in which the locked member can be placed and supported. The locking mechanism is provided with a second locking pin capable of locking the locked member.
The field work machine according to claim 4 or 5, wherein a through hole through which the second locking pin can penetrate is formed in each of the locking mechanism and the locked member.

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