JP7169886B2 - field work machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a field working machine provided with a traveling machine body capable of traveling in a field, a riding section provided on the traveling machine body, and a canopy covering the riding section from above.

For example, Patent Document 1 discloses a paddy field work machine as an example of a field work machine, and the paddy field work machine is provided with a canopy (a "roof" in the document) that covers the upper part of a riding section (a region of a "driver's seat" in the document). It is This canopy is supported by a front support ("support frame" in literature) extending upward from the front of the fuselage.

JP 2016-67259 A

By the way, the canopy disclosed in Patent Literature 1 is configured so that the canopy can be tilted with respect to the front support portion, but is not configured so that the height of the canopy at the front end can be changed. For this reason, for example, when storing the field working machine in a warehouse or the like, if the height of the ceiling of the warehouse is lower than the height of the front end of the canopy, the worker must not move the canopy or the front support when storing the field working machine. Therefore, it is troublesome for the operator to store the field implement.

In addition, the canopy disclosed in Patent Document 1 is cantilever supported only by the front support part, but considering the case where the canopy is blown by the wind, it is desirable that the canopy be supported not only at the front part but also at the rear part. .

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

An agricultural field working machine according to the present invention comprises a traveling machine body capable of traveling in a field, a working device 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 farm field, and capable of working on the farm field. A riding part provided on the traveling body across the width of the traveling body, a front support part standing upright on the front part of the traveling body, and standing on the rear part of the traveling body, and above and below the upper end a height-changeable rear support portion; a connecting portion swingably connected to and supported by an upper portion of the front support portion; a canopy supported and supported by the rear support portion and covering the riding portion from above; the canopy changes the vertical height of the upper end of the rear support portion; By changing the vertical height of the free end portion of the part, a working position, which is a vertical height at which a rider on the riding part can perform agricultural work, and a working position that is higher than the working position across the front and rear of the canopy It is characterized in that it is configured to be switchable between a low storage position and a storage position.

According to the present invention, the canopy is supported by the front support section and supported by the rear support section through the connecting section. In other words, since the canopy is both supported by the front support part and the rear support part, even if the canopy is blown by the wind, the support structure of the canopy is improved compared to the configuration in which the canopy is supported on one side. Be strong. Moreover, 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. For this reason, even when the field work machine is stored in a warehouse with a relatively low ceiling, for example, the operator (the operator may be a passenger; the same shall apply hereinafter) removes the canopy. The field work machine can be stored in the warehouse or the like simply by changing the overall height of the canopy. As a result, it is possible to realize an agricultural work machine having a canopy that is firmly supported by the traveling machine body and whose vertical height can be easily changed.

In the present invention, a pair of left and right rear support parts and a pair of right and left steps for getting on and off the boarding part are provided, and the pair of left and right rear support parts are provided for the getting on and off. It is preferable that the step is positioned rearward of the machine body from the step and further inside the machine body than the left and right end portions of the working device.

With this configuration, the rear support portion is positioned at the rear of the vehicle body with respect to the step for getting on and off. For this reason, the rear support is arranged at the rear of the riding section or rearward of the riding section. As a result, 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. In addition, since the pair of left and right rear support portions are located inside the machine body relative to the left and right ends of the work device, the rear support portions are more difficult than a configuration in which the rear support portions are located outside the body relative to the left and right ends of the work device. The fear of coming into contact with an obstacle or the like in the field is reduced.

In the present invention, the rear support portion includes a first support portion erected at the rear portion of the traveling body, and a height position that extends above the first support portion and is changeable with respect to the first support portion. and a holding mechanism provided on the first supporting portion and capable of holding the position of the second supporting portion. It is preferably located lower than the upper end of the working device in case.

In this configuration, the configuration for changing the relative height position of the second support portion with respect to the first support portion and the configuration for holding the position of the second support portion by the holding mechanism change and hold the vertical height of the canopy. is possible. In other words, the structure of the rear support part that can change the vertical height of the canopy is realized with a structure that is as simple as possible. In addition, since the vertical height of the holding mechanism is lower than the upper end of the working device when the working device is raised to the maximum, even when the worker is working on the working device, the holding mechanism does not work. It is difficult for workers to get in the way of their work.

An agricultural field working machine according to the present invention comprises a traveling machine body capable of traveling in a field, a working device 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 farm field, and capable of working on the farm field. A riding part provided on the traveling body across the width of the traveling body, a front support part standing upright on the front part of the traveling body, and standing on the rear part of the traveling body, and above and below the upper end a rear support part whose height can be changed; a connection part which is swingably connected to and supported by an upper part of the front support part; A canopy mounted and supported on the rear support portion and covering the riding portion from above, and a satellite positioning unit supported by the connecting portion and capable of detecting the position of the traveling body using a navigation satellite are provided. , the canopy can be positioned at a working position at a vertical height at which a rider on the riding section can perform agricultural work by changing the vertical height of the upper end of the rear support section, and at a position lower than the working position. It is characterized by being switchable between a retracted position and a retracted position .

With this configuration, the connecting portion is used both as a support structure for the canopy and as a support structure for the satellite positioning unit. Therefore, compared to a configuration in which the satellite positioning unit is provided on a member separate from the connecting portion, the configuration of the field work machine is simplified, which is advantageous in terms of cost.

It is preferable that the connecting portion is swung downward while the canopy is switched to the retracted position, and the satellite positioning unit is positioned below the upper end portion of the front support portion. be.

According to this configuration, the free end of the vertically swingable connecting portion is configured to be swingable downward from the upper end portion of the front support portion integrally with the satellite positioning unit. 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 set the vertical height of the satellite positioning unit as low as possible when the canopy is in the retracted position. becomes. In other words, the worker can collectively lower the vertical positions of the satellite positioning unit and the canopy by swinging the connecting portion downward. For this reason, the work of storing the field work machine becomes easier for the worker.

In the present invention, it is preferable that the upper end of the canopy in the working position is positioned higher than the upper end of the satellite positioning unit.

With this configuration, the vertical height of the upper end of the canopy is positioned higher than the upper end of the satellite positioning unit. workability is improved.

In the present invention, the canopy has a vertical height at which a passenger on board the riding section can work, and is configured to be switchable to a simple storage position located lower than the working position,
It is preferable that the upper end of the canopy in the simple retracted position be lower in vertical height than the upper end of the satellite positioning unit.

With this configuration, the occupant can work while the canopy is positioned lower than the working position. Work space is secured. Further, the positioning accuracy of the satellite positioning unit is improved by the configuration in which the upper end of the canopy is positioned lower in vertical height than the upper end of the satellite positioning unit.

It is a machine body left side view which shows the riding type rice transplanter as an agricultural field working machine. It is a top view which shows the riding-type rice transplanter as an agricultural field working machine. It is a front view which shows the part of the riding part in a riding type rice transplanter, and its periphery. It is a perspective view which shows the part of a 1st preliminary seedling mounting base and a 2nd preliminary seedling mounting base. It is a body right side view showing the support structure of the preliminary seedling stand unit having the second preliminary seedling placing stand. Fig. 10 is a front view showing a support structure on the free end side in the spare seedling stand unit having the second spare seedling placing stand. Fig. 10 is a rear view showing a support structure on the base end side in the preliminary seedling platform unit having the second preliminary seedling platform. Fig. 2 is a plan view showing a riding-type rice transplanter having a canopy; Fig. 10 is a left side view of the body of the riding-type rice transplanter with the canopy in the simple storage position; Fig. 3 is a left side view of the body of the riding-type rice transplanter with the canopy in the retracted position; It is a fuselage left side view showing a holding mechanism. It is a front view showing a holding mechanism. Fig. 3 is a left side view of the fuselage showing the locking mechanism and the locked member; 14 is a cross-sectional view taken along line XIV-XIV in FIG. 13 showing the locking mechanism and the locked member; FIG. FIG. 4 is a bottom view showing an example of the configuration of a canopy portion.

[Basic configuration of field work machine]
An embodiment of the present invention will be described based on the drawings. Here, a ride-on type rice transplanter will be described as an example of a field working machine. In FIG. 2, the arrow "F" is the front side of the running body C, the arrow "B" is the rear side of the running body C, the arrow "L" is the left side of the running body C, and the arrow "R" is the left side of the running body C. ” is the right side of the traveling body C.

As shown in FIGS. 1 and 2, the riding rice transplanter has a pair of left and right steering wheels 10, 10 and a pair of left and right rear wheels 11, 11. A body C is provided. A seedling planting device W as a working device is supported and connected to the rear portion of the traveling body C so as to be able to move up and down. A pair of left and right steering wheels 10 are provided at the front part of the traveling machine body C and are configured to be able to change the direction of the traveling machine body C, and a pair of left and right rear wheels 11 are provided at the rear part of the traveling machine body C. It is The seedling planting device W is connected to the rear end of the traveling body C via a link mechanism 17 so as to be vertically movable. The link mechanism 17 is lifted and lowered by the extension and contraction of the lifting hydraulic cylinder 16 .

An engine 13 capable of driving the traveling body C and an opening/closing bonnet 12 are provided in the front part of the traveling body C. - 特許庁The bonnet 12 has an inclined surface that slopes rearward and upward, 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 transmission mechanism for transmitting the power of the engine 13 to the steered wheels 10 and/or the rear wheels 11 . The power of the engine 13 is transmitted to the steered wheels 10 and the rear wheels 11 through the transmission mechanism provided in the machine body, and the power after the transmission is planted through an electric motor-driven planting clutch (not shown). It is transmitted to the device W. The traveling body C is provided with a body frame 14 extending in the longitudinal direction, and a support column frame 15 is erected on the front part of the 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) rotary cases 19, a ground leveling float 21, and a seedling placement table 22. The rotating case 19 is rotatably supported on the left and right sides of the rear portion of each transmission case 18 . A pair of rotary planting arms 20 are provided at both ends of each rotary case 19 . The ground leveling float 21 is for leveling the surface of the field, and the seedling planting apparatus W is provided with a plurality of the ground leveling floats 21 . Mat-like seedlings for planting are placed on the seedling placing table 22 .

The seedling planting device W rotates each rotary case 19 by the power transmitted from the transmission case 18 while driving the seedling placement table 22 to reciprocate and laterally feed the seedling placement table 22 to the left and right. Seedlings are alternately taken out by an arm 20 and planted on the surface of a field. Although not shown, the seedling planting device W is configured to plant seedlings by planting arms 20 provided on a plurality of rotating cases 19 .

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

At the central portion of the traveling machine body C, a riding section 25 is provided in which various driving operations are performed. The riding section 25 is provided on the traveling body C across the width of the traveling body C. As shown in FIG. 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, for example. A boarding seat 26 is provided in the central portion of the traveling body C and is configured so that a passenger can sit there. The steering handle 27 is configured such that the steered wheels 10 can be steered manually. For example, the operation of switching between forward and backward movement of the traveling machine body C and the operation of changing the traveling speed can be performed by operating the main gear shift lever 28, etc., and the raising and lowering operation of the seedling planting device W can be performed by various operation tools of the riding section 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 step 35 for boarding/alighting is configured so that a passenger can get on/off the boarding section 25 from left and right sides of the boarding section 25 . A canopy 50 , which will be described later, is provided above the riding section 25 .

Left and right sides of the bonnet 12 of the traveling machine body C are provided with a foldable first spare seedling platform 31 having rails and a spare seedling stand unit 40 which will be described later. The first spare seedling placing table 31 and the spare seedling stand unit 40 are configured so that spare seedlings for replenishing the seedling planting device W can be placed thereon. A pair of left and right first frames 32 are provided on the left and right sides of the bonnet 12 of the traveling machine body C. As shown in FIG. In the present invention, the first frame 32 is a front support portion erected on the front portion of the traveling body C. As shown in FIG.

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

A hinge 33A is provided on each of the upper ends of the pair of left and right first frames 32, 32, and a connecting portion 33 is horizontally mounted across the pair of left and right hinges 33A, 33A so as to be vertically swingable. The connecting portion 33 is configured to be able to swing up and down about an axis in the lateral direction of the machine body via a pair of hinges 33A, 33A. The connecting portion 33 is configured to be switchable between a state of extending upward from the upper end portion of the first frame 32 and a state of extending downward from the upper end portion of the first frame 32 by swinging of the connecting portion 33 . . In this manner, the connecting portion 33 is connected to and supported by the upper portion of the first frame 32 so as to be swingable, and the free end portion thereof is configured to be capable of swinging up and down.

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

[Regarding the configuration of the spare nursery 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 arranged side by side in the front-rear direction and are connected to each other. The first preliminary seedling placement table 31 is configured to be foldable by stacking the front side placement table and the rear side placement table on the front and rear center placement table. The front mounting table is configured to swing back and forth about a swing fulcrum on the front side of the front and rear center mounting table, and the rear side mounting table swings back and forth about the swing fulcrum on the rear side of the front and rear center mounting table. 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 mounting table 31 is put into a usable state in which mat-shaped seedlings, seedling boxes, seedling scooping boards, etc. can be mounted. In this manner, the first preliminary seedling placement table 31 is supported by the front portion of the traveling machine body C, and is extended in the front-rear direction to allow seedlings to be placed thereon, and folded to be folded in which seedlings cannot be placed thereon. , and is configured to be switchable.

In the left side view of the machine body shown in FIG. is configured to be switchable from the folded state to the used state. However, the spare seedling board unit 40 in use is positioned above the front-rear center mounting board, and the spare seedling board unit 40 and the front-rear center mounting board of the first spare seedling board 31 overlap in plan view. With the first spare seedling mounting table 31 folded, the front mounting table and the rear mounting table are stacked on the center mounting table in the front and rear. Therefore, when an operator tries to swing the front mounting base and the rear mounting base, the front mounting base and the rear mounting base abut against the preliminary seedling base unit 40, and the operator is forced to move the first standby. There is a possibility that the seedling placement 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 able to swing about the vertical axis V with respect to the first frame 32 .

The spare seedling stand unit 40 has a plurality of second spare seedling placing stands 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 mounts 41 are supported by the second frame 42 in a vertically aligned state. In addition, FIG. 4 shows the second preliminary seedling placement table 41, the second frame 42, and the like on the right side of the machine body. A pair of second vertical support bars 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 up-down support rods downward from the upper end portion, and is provided on both sides of the pair of second up-down support rods. , the respective second preliminary seedling mounting bases 41 are supported. As viewed in the front-rear direction, the second frame 42 cantilevers the second preliminary seedling platform 41 . Although not described in detail, each of the second preliminary seedling mounting 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 extends in the horizontal direction while the second preliminary seedling mounting table 41 is rocked to the lowest side. In this state, the mat-like seedling, seedling box, seedling scooping board, 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 the first vertical support rod in the front portion of the pair of first vertical support rods of the first frame 32, and 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 . 5 to 7 show the locking support portion 43, the swing support portion 44, and the like of 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 holes 44A and 44B. It has a cylindrical hole along V. Of the pair of second vertical support rods in the U-shaped second frame 42, the second vertical support rod at the rear part of the fuselage is provided with a pair of upper and lower swing connecting portions 42A, 42A. The dynamic coupling portions 42A, 42A are swingably supported by the swing support portion 44 via a pair of fulcrum pins 46, 46. As shown in FIG. Therefore, of the pair of second vertical support rods in the second frame 42, the second vertical support rod at the rear part of the fuselage is the rocking base end. For this reason, the second preliminary seedling placement table 41 is configured to be swingable around the vertical axis V. As shown in FIG. The fulcrum pin 46 is formed in a cylindrical shape.

A pair of upper and lower horizontal surface portions capable of coming into contact with the shaft core hole portion 44A or the shaft core hole portion 44B from above and below are provided in one swing connecting portion 42A, and through holes are formed in these horizontal surface portions. . That is, a through hole is formed in each of the pair of upper and lower horizontal surface portions of each of the pair of upper and lower swing connecting portions 42A, 42A, and these through holes overlap each other in plan view.

The upper swing connecting portion 42A and the shaft center hole portion 44A of the second frame 42 can contact each other. In addition, the lower swing connecting portion 42A and the shaft center hole portion 44B of the second frame 42 can come into contact with each other. In a state in which 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 holes 44A and 44B overlap in plan view. do. A pair of swing connecting portions 42A, 42A and a pair of upper and lower shaft core holes 44A, 44B are swingably connected by passing the fulcrum pin 46 through these holes.

A horizontal surface is formed at the upper end of the fulcrum pin 46 and extends outside the cylindrical portion of the fulcrum pin 46 . A hole through which the bolt 46a can be inserted is formed in this horizontal surface. A bolt 46a is inserted through this hole, and the bolt 46a is bolt-connected to the swing connection portion 42A, thereby connecting the fulcrum pin 46 and the swing connection portion 42A. As a result, the upper fulcrum pin 46 is connected and fixed to the swing connection 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 connection portion 42A and the shaft core hole portion 44B. It is connected and fixed so as not to come off.

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 when viewed from the front or rear, and each of the locking portions 43A and 43B has a through-hole penetrating vertically. The through holes in the pair of locking portions 43A and 43B are formed at overlapping positions in plan view, and the pair of locking portions 43A and 43B are configured so that the rod-like 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 locking portion 43B on the lower side. A through hole is also formed in the intermediate surface portion 43C, and the engagement portion 43B is configured so that the rod-shaped portion of the hook member 45 can be vertically inserted through the intermediate surface portion 43C as well. A vertical coil spring 47 and a washer 48 are vertically aligned and inserted into the space between the upper surface portion and the intermediate surface portion 43C of the locking portion 43B. The washer 48 is arranged below the coil spring 47 .

A pair of upper and lower engaged members 42B, 42B are provided at the free ends of the second vertical support rods in the front part of the fuselage of the pair of second vertical support rods in the second frame 42 formed in a U shape. is provided. That is, a pair of upper and lower locked members 42B, 42B that can correspond to the pair of upper and lower locking portions 43A, 43B are provided on the other end side of the pair of second vertical support rods. Through holes corresponding to the through holes of the engaging portions 43A and 43B are formed in the upper and lower engaged members 42B and 42B, respectively.

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 outer side of the fuselage in the lateral direction of the fuselage. 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 cantilever supported by the swing support portion 44 . At this time, the members to be locked 42B, 42B are also displaced downward. , 42B abut. Then, the members to be locked 42B, 42B are lifted integrally with 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 of the locking portion 43A, and the lower 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 plan view. The members to be locked 42B, 42B are locked to the locking support portion 43 by vertically inserting the rod-shaped portions of the hook members 45 through these through holes.

In this manner, the locking support portion 43 and the rocking support portion 44 are supported by the pair of first vertical support rods of the first frame 32, respectively, and the locked members 42B and 42B are connected to 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 . That is, one end of the pair of second vertical support rods of the second frame 42 is pivotally connected to one end of the pair of first vertical support rods of the first frame 32 . Further, a locking support portion 43 capable of locking the other end of the pair of second vertical support rods of the second frame 42 is provided on the other end side of the pair of first vertical support rods of the first frame 32. It is The second frame 42 is positioned laterally outside the machine body relative to the first frame 32, and the second frame 42 and the second preliminary seedling mounting base 41 are integrally configured to swing laterally outside the machine body.

As shown in FIGS. 1 to 3, in a state in which the engaged members 42B and 42B are engaged with the engaging support portions 43, the second preliminary seedling mounting base 41 is positioned directly above the first auxiliary seedling mounting base 31. Located in As shown in FIG. 4, in a state in which the second preliminary seedling placement table 41 and the second frame 42 are swung toward the rear side of the machine body about the vertical axis V, the second preliminary seedling placement table 41 is placed on the first spare seedling placement table. It is not positioned right above the seedling placement table 31. The configuration in which the second preliminary seedling placement table 41 is positioned directly above the first preliminary seedling placement table 31 secures a wide space above the step 35 for getting on and off. , the possibility that the passenger feels cramped is reduced. In addition, the second preliminary seedling placement table 41 is not located directly above the first preliminary seedling placing table 31 in a state where the second preliminary seedling placement table 41 is swung to the rear side of the machine body. Therefore, even if the seedlings are placed on the second preliminary seedling placing table 41 while the first preliminary seedling placing table 31 is folded, the operator cannot place the seedlings on the second preliminary seedling placing table 41. The first spare seedling placement table 31 can be spread out to use without removing the seedlings.

A riding-type rice transplanter, which is an example of an agricultural field work machine, has a slightly forward tilting posture. Even if the state is released, the second frame 42 and the second preliminary seedling placement table 41 are unlikely to swing freely. In addition, the second frame 42 and the second preliminary seedling placement table 41 are arranged on the side where the front-rear center of the machine body is located in the front-rear direction of the machine body when swinging to the swing end point on the side opposite to the side where the locking support portion 43 is located. Also, in the lateral direction of the fuselage, it is possible to oscillate to the side where the lateral center of the fuselage is located. For this reason, for example, when an operator stores the field work machine, by swinging the second frame 42 and the second preliminary seedling platform 41 to the end opposite to the side where the locking support part 43 is located, , the storage space of the field work machine can be made compact. In this way, the first preliminary seedling placement table 31 and the second preliminary seedling placement table 41 are realized in which both the easiness of the seedling replenishment work and the seedling capacity are compatible.

As shown in FIGS. 4 to 6, in the bar-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 regions corresponding to the coil spring 47 and the washer 48. . The snap pin 45a is inserted through the insertion hole in a state in which the coil spring 47 and the washer 48 are 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 a downward biasing 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 passes through the through holes in the pair of locking portions 43A and 43B. The position is held in the state where the In other words, if the hook member 45 is not manually operated, the hook member 45 is held in a position so as to be able to pass through the respective through holes in the swing connecting portions 42A, 42A.

In this manner, the hook member 45 is hooked to the pair of upper and lower locking portions 43A, 43B and the pair of upper and lower locked members 42B, 42B, whereby the pair of upper and lower locking portions 43A, 43B and the upper and lower locking portions 43A, 43B are hooked. It is configured to be able to maintain the locked state with the pair of locked members 42B, 42B.

Based on FIG.4, FIG5 and FIG.6, the connection support structure of the latch support part 43 with respect to the 1st frame 32 is demonstrated. A portion of the locking support portion 43 that is connected to the first frame 32 is formed in a U shape in a plan view. The first frame 32 is sandwiched in the space surrounded by the U shape at 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 distal end portions extend from the U-shaped base end portion toward the side where the swing support portion 44 is located. extension. Bolt insertion holes are formed in the upper and lower central portions of a pair of plate-like members extending from the U-shaped base end portion toward the U-shaped tip end portion of the locking support portion 43 . Furthermore, a nut is welded and fixed to a portion of the pair of bolt insertion holes on the lateral outer side of the body. Such a welded nut is hereinafter referred to as a "weld nut".

Although not shown, a bolt insertion hole is formed in the front first vertical support rod of the pair of first vertical support rods of the first frame 32, and this bolt insertion hole is used for the first vertical support. Penetrate the bar across the fuselage lateral direction. A bolt 43G is inserted through the bolt insertion hole in the first vertical support rod and the bolt insertion hole at the vertical central portion of the locking support portion 43, and the bolt 43G is fastened to a weld nut on the lateral outer side of the machine body.

In the locking support portion 43, the upper and lower portions of the U-shaped distal end portions of the pair of plate-shaped members bulge toward the side where the swing support portion 44 is located from the upper and lower central portions of the pair of U-shaped distal end portions. put out A pair of bolt insertion holes is formed in each of the upper and lower bulging portions, and a weld nut is provided in each of these bolt insertion holes on the laterally outer side of the vehicle body. Cylindrical spacers 43E, 43E are inserted across the pair of bolt insertion holes in the upper and lower bulging portions, respectively, and bolts 43F, 43F are inserted in the spaces in the cylinders of the pair of upper and lower spacers 43E, 43E, respectively. be. The bolts 43F, 43F are respectively fastened to the upper and lower weld nuts on the lateral outer side of the machine body. The pair of upper and lower spacers 43E, 43E prevent the bolts 43F, 43F from being excessively tightened, and the distance between the pair of U-shaped distal ends is maintained by the distance of the spacer 43E.

In this manner, the locking support portion 43 sandwiches the first frame 32 between a pair of U-shaped distal side plate-like members extending from the U-shaped proximal end portion. As a result, the locking support portion 43 is firmly connected to and supported by the first frame 32 .

Based on FIG.4, FIG.5 and FIG.7, the connection support structure of the rocking support part 44 with respect to the 1st frame 32 is demonstrated. A portion of the swing support portion 44 that is connected to the first frame 32 is formed in a U shape in a plan view. The first frame 32 is sandwiched in the space surrounded by the U shape at 44 . Axial hole portions 44A and 44B are provided in the U-shaped proximal end portion of the swing support portion 44, and a pair of U-shaped distal end portions face the locking support portion 43. As shown in FIG. A pair of plate-shaped members extending from the U-shaped proximal end portion toward the U-shaped distal end portion of the swing support portion 44 are formed with bolt insertion holes at upper and lower center portions thereof, respectively. Further, a weld nut is provided at a portion of the pair of bolt insertion holes on the lateral outer side of the 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 inserted into the first vertical support rod. through the fuselage lateral direction. A bolt 44E is inserted through the bolt insertion hole in the first vertical support rod and the bolt insertion hole at the vertical central portion of the swing support portion 44, and the bolt 44E is fastened to a weld nut on the lateral outer side of the machine body.

In the rocking support portion 44, the upper and lower portions of the U-shaped distal end portions of the pair of plate-like members bulge toward the locking support portion 43 from the upper and lower central portions of the pair of U-shaped distal end portions. put out A pair of bolt insertion holes is formed in each of the upper and lower bulging portions, and a weld nut is provided in each of these bolt insertion holes on the laterally outer side of the vehicle body. Cylindrical spacers 44C, 44C are inserted across the pair of bolt insertion holes in the upper and lower bulging portions, respectively, and bolts 44D, 44D are inserted in the spaces in the cylinders of the pair of upper and lower spacers 44C, 44C, respectively. be. The bolts 44D, 44D are respectively fastened to upper and lower weld nuts on the lateral outer side of the machine body. The pair of upper and lower spacers 44C, 44C prevent the bolts 44D, 44D from being excessively tightened, and the distance between the pair of U-shaped distal ends is maintained by the distance of the spacer 44C.

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

[Regarding the configuration of the canopy]
A canopy 50 is provided above the riding section 25 as shown in FIGS. A pair of swinging pivots 51, 51 are swingably connected to two left and right positions in the front portion of the canopy 50. As shown in FIG. A pair of rocking pivotal support portions 51 , 51 are fitted on both left and right ends of the upper portion of the connecting portion 33 . As a result, the canopy 50 is configured to be swingable around the pair of pivotal support portions 51 , 51 .

A pair of rear support portions are erected from both left and right ends of the rear portion of the traveling body C. As shown in FIG. The pair of left and right rear support portions are located behind the step 35 for getting on and off the machine body and inside the machine body from both left and right end portions of the seedling planting apparatus W as a working device. As a result, 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 from the rear side of the riding section 25). In addition, since the pair of left and right rear support parts are positioned inside the body of the seedling planting device W from the left and right ends, the rear support parts are positioned outside the body from the left and right ends of the seedling planting device W. As a result, the risk of the rear support portion coming into contact with an obstacle or the like in the field is reduced.

The rear support has a first support 54B and a second support 54A. The first support portion 54B is erected at the rear portion of the traveling body C. As shown in FIG. The second support portion 54A is configured to be able 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. Each of the second support portion 54A and the first support portion 54B is connected via a holding mechanism 55 so as to extend vertically. Thereby, the rear support portion is configured such that the vertical height of the upper end thereof can be changed.

A pair of locked members 53, 53 are connected to the left and right ends of the canopy 50 near the rear, and the canopy 50 is supported by the second support portion 54A where the locked member 53 is located. The pair of first support portions 54B, 54B are provided laterally outside the vehicle body relative to the step 35 for getting on and off in the lateral direction of the vehicle body. The vertical height of the holding mechanism 55 is positioned lower than the upper end portion of the seedling planting apparatus W when the seedling planting apparatus W as a working apparatus is raised to the maximum. Therefore, even when a worker works on the seedling planting device W, the holding mechanism 55 is less likely to interfere with the worker's work.

In this manner, the canopy 50 is supported by the connecting portion 33 and mounted and supported by the second support portions 54A of the pair of rear support portions to cover the riding portion 25 from above. In addition, 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 frames 50A and 50B, a rear outer 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. 50G, 50G. The front outer frame 50A is provided on the left side of the fuselage, and the front outer frame 50B is provided on the right side of the fuselage. These frames may be made of metal, or may be made of resin such as polyvinyl chloride.

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

The rear outer frame 50C is bent into a U-shape in plan view, and each terminal end of the U-shaped rod-like member is oriented forward of the fuselage. The pipe end portions of the front outer frame 50A and the rear outer frame 50C are connected to each other via fitting members 52 . Further, the end portions of the pipes of the front outer frame 50B and the rear outer frame 50C are connected to each other via fitting members 52 . The fitting member 52 on the left side of the fuselage is fitted from the rear on the terminal portion of the front outer frame 50A on the rear side of the fuselage, and also fits on the terminal portion on the left side of the fuselage of the rear outer frame 50C from the front. The fitting member 52 on the right side of the fuselage is fitted from the rear on the terminal portion of the front outer frame 50B on the rear side of the fuselage, and also fits on the terminal portion of the rear outer frame 50C on the right side of the fuselage from the front. Thus, the outer frame of the canopy 50 is formed by the symmetrical front outer frames 50A and 50B and the rear outer frame 50C.

The front outer frames 50A and 50B and the fitting member 52 may be integrally formed, or the rear outer frame 50C and the left and right fitting members 52 and 52 may be integrally formed. Also good. Also, each of the front outer frames 50A and 50B may be configured to be extendable with respect to the rear outer frame 50C.

Each of the front horizontal frame 50D and the rear horizontal frame 50E is a rod-shaped member that extends in the lateral direction of the fuselage inside the outer frame of the canopy 50 . Both ends of the front lateral frame 50D are connected to front-rear direction intermediate portions of the front outer frames 50A and 50B. Both ends of the rear horizontal frame 50E are connected to front-rear direction middle points of the U-shaped forward extending regions 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 point between the front outer frame 50A and the front outer frame 50B and a longitudinal intermediate point of the front lateral frame 50D. A mirror 57 is supported by the first front-rear frame 50F. The mirror 57 is used by the passenger to check the rear of the traveling body C, and the passenger can check the rear of the body through the mirror 57 while facing the front of the body.

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 to be smaller than the cross-sections of the front outer frames 50A and 50B and the cross-section of the rear outer frame 50C. It is Each of the three second front and rear frames 50G, 50G, 50G is arranged side by side in the lateral direction of the aircraft body. 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.

The canopy 50 covers the riding section 25 by covering the canopy 50 from above with a flexible hood 58 inside the outer frame of the canopy 50 . Although the top 58 is not shown in FIGS. 3 and 8, the top 58 actually exists in FIGS. 3 and 8 as well. The hood 58 covers the riding section 25 from above the outer frame of the canopy 50, the front lateral frame 50D, the rear lateral frame 50E, the first front and rear frames 50F, and the second front and rear frames 50G. The front end of the canopy 50 is located forward of the upper end 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. This reduces the risk of rainwater dripping onto various meter devices on the front side of the handle 27.例文帳に追加

A pair of left and right swing pivot portions 51, 51 are connected to the front outer frame 50A and the front outer frame 50A, respectively. A pair of rocking pivotal support portions 51, 51 are positioned at both left and right ends of the upper portion of the connecting portion 33, and a satellite positioning unit 34 is arranged between the pair of rocking pivotal support portions 51, 51. As shown in FIG. In the present embodiment, the front end portions of the front outer frames 50A and 50B, that is, the connection points between the front outer frame 50A and the front outer frame 50B are positioned closer to the front ends of the front outer frames 50A and 50B than the front ends of the front outer frames 50A and 50B. located behind. That is, the front end portions of the front outer 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 swinging pivots 51, 51, the front outer 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 so that the connection point between the front outer frame 50A and the front outer frame 50B is located on the rear side of the front ends of the front outer frames 50A and 50B in the front-rear direction. Frames 50A and 50B are configured. As a result, a recessed space S is formed in the left-right central portion of the front end of the canopy 50 , and the rear portion of the satellite positioning unit 34 is positioned in the recessed space S. With this configuration, even if the canopy 50 swings around the pair of swinging pivots 51 , 51 , the connection point between the front outer frame 50</b>A and the front outer frame 50</b>B is located behind the satellite positioning unit 34 . to oscillate. Therefore, interference between the front outer 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 part of the rear outer frame 50C on the left side of the machine body where the fitting member 52 is located. In addition, the locked member 53 on the right side of the machine body is welded and fixed to a lower part of the rear outer frame 50C on the right side of the machine body 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 engaged members 53, 53 are connected to the front-rear direction intermediate portions of the forward extending regions of the U-shaped 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 multiple steps. Specifically, a holding mechanism 55 is provided at the upper end portion of the first support portion 54B, and three engaging protrusions 54C, 54D, and 54E are provided side by side along the longitudinal direction of the second support portion 54A. That is, the three engaging protrusions 54C, 54D, and 54E each protrude from the surface of the second support portion 54A at different heights on the second support portion 54A. The holding mechanism 55 is formed in a U shape that is open on the inner side of the lateral side of the fuselage in a plan view, and an engagement concave portion 55k is formed at the inner end of the U shape on the lateral side of the fuselage. The engagement recess 55k and each of the engagement protrusions 54C, 54D, and 54E can be engaged, and depending on which of the engagement protrusions 54C, 54D, and 54E engages with the engagement recess 55k, The vertical height of the canopy 50 changes. In this manner, the second support portion 54A is provided with a plurality of engaging protrusions 54C, 54D, and 54E that protrude 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. 55 is formed with an engaging recess 55k that can be engaged with the engaging protrusions 54C, 54D, and 54E.

In the embodiment shown in FIG. 1, the engaging protrusion 54C and the engaging recess 55k are engaged. In this state, the canopy 50 inclines rearward upward toward the rear side. The vertical height of the upper end of the canopy 50 at this time is positioned higher than the upper end of the satellite positioning unit 34 . As a result, when the passenger stands up from the boarding seat 26 to replenish the mat-like seedlings on the seedling platform 22, the passenger's working space is easily secured. In other words, if the canopy 50 is at the vertical height shown in FIG. In this embodiment, this position is called a "working position".

When the vertical height of the canopy 50 is set at the working position, the canopy 50 tilts rearward and upward. Further, as described above, the front end portion of the canopy 50 is located forward of the upper end portion of the bonnet 12 rearwardly rising inclined surface. Therefore, even if rainwater falls on the canopy 50 , the rainwater is guided to the front end of the canopy 50 and drips down from the front end of the canopy 50 onto the rear rising inclined surface of the bonnet 12 .

The upper end portion of the canopy 50 is the rear end portion of the canopy 50 when the canopy 50 is tilted rearwardly upward. A front end portion of the canopy 50 is a rocking 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 compared to 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 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 work space for the passenger in the vertical direction is ensured. .

In the embodiment shown in FIG. 9, the engagement protrusion 54D and the engagement recess 55k are engaged. 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 positioned lower than the upper end of the satellite positioning unit 34 . Therefore, with the vertical height of the canopy 50 shown in FIG. 9, the occupant riding on the riding section 25 can perform agricultural work 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 positioned lower than the upper end of the satellite positioning unit 34, the vertical height of the canopy 50 is set to the working position. 34 positioning accuracy is likely to be sufficiently ensured. In this embodiment, this position is called a "simplified storage position".

In the embodiment shown in FIG. 10, the connecting part 33 is swung downward and the satellite positioning unit 34 is positioned below the upper end 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 rearwardly upward toward the rear side. The upper end of the canopy 50 is located higher than the upper end of the satellite positioning unit 34 . With the vertical height of the canopy 50 at this time, it is impossible for the rider on board the riding section 25 to perform agricultural work. In this embodiment, this position is called a "storage position".

In this way, by changing the vertical height of the upper end of the second support portion 54A, the canopy 50 can be positioned at a working position at a vertical height at which a passenger on board the riding portion 25 can perform agricultural work, It is configured to be switchable between a simple storage position located lower than the working position and having a vertical height at which a passenger on board can work, and a storage position located lower than the simple storage position.

[Regarding the canopy retention mechanism]
As shown in FIGS. 1, 3, 11 and 12, the second support portion 54A is supported by a holding mechanism 55. As shown in FIG. The holding mechanism 55 has a U-shaped first locking pin 55A, a slide member 55B, and a snap pin 55C. A first through hole 55d, a second through hole 55e, and projecting portions 55f, 55f are formed in the first locking pin 55A. The first locking pin 55A is configured to be slidable in the fuselage longitudinal direction along the support hole 55j of the holding mechanism 55. A first through hole 55d and a tip portion 55g are provided at both ends of the U-shaped 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 fuselage, but the end portion where the first through hole 55d and the tip portion 55g are located faces the fuselage. The first locking pin 55A may be configured to face forward. A longitudinal intermediate portion between the U-shaped ends of the first locking pin 55A is located on the opposite side of the U-shaped ends across the support hole 55j in the longitudinal direction of the fuselage. The protruding portions 55f, 55f are located on the front side of the body from the support hole 55j, and protrude to the outer diameter side from the inner diameter of the support hole 55j. The slide member 55B is fitted onto the first locking pin 55A on the rear side of the body relative to the support hole 55j.

A through hole 55i is formed in the holding mechanism 55 . Also, three through holes 54f, 54g, and 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.

When the engaging projection 54C and the engaging recess 55k are engaged with each other, the through hole 55i and the through hole 54f overlap when viewed in the front-rear direction. In this state, an 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. .

When the engaging projection 54D and the engaging recess 55k are engaged with each other, the through hole 55i and the through hole 54g overlap when viewed in the front-rear direction. In this state, an 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. .

In a state where the engaging protrusion 54E and the engaging recess 55k are engaged, the through hole 55i and the through hole 54h overlap when viewed in the front-rear direction. In this state, an 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 in any one of the through holes 54f, 54g, and 54h and the through hole 55i, the operator moves the slide member 55B to the position of the support hole 55j rather than the second through hole 55e. side to insert the snap pin 55C into the second through hole 55e. As a result, the sliding of the slide member 55B is restricted by the snap pin 55C, and the sliding of the first locking pin 55A is restricted by the slide member 55B and the protrusions 55f, 55f. With this configuration, the tip portion 55g does not come off from the through hole 55i and the through hole 54f, and the second support portion 54A is locked to the first locking pin 55A. Thus, 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 operator 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 The member 55B is slidable in a region between a portion contacting the support hole 55j and a portion contacting the snap pin 55C inserted into the first through hole 55d. Along with this, the first locking pin 55A is formed between the support hole 55j and the protrusions 55f, 55f, and the snap pin 55C inserted into the support hole 55j and the first through hole 55d. It becomes possible to slide in the front-rear direction over the area between the part sandwiched between the two. Therefore, when the first locking pin 55A slides to the side where the projecting portions 55f, 55f are separated from the support hole 55j, the tip portion 55g is removed from the through hole 55i and the through hole 54f, and the second support portion 54A is separated from the second support portion 54A. The locked state of the one locking pin 55A is released. A separate snap pin may be previously inserted through the first through hole 55d, and the operator may remove the snap pin 55C from the second through hole 55e.

[Regarding the locking mechanism of the canopy]
As shown in FIGS. 1, 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. An engageable latched member 53 is provided. The upper end portion of the second support portion 54A is formed to bend from upward to the laterally inward side of the fuselage. Although not described in detail, a locking mechanism 56 is supported at the end portion of the second support portion 54A facing inward laterally of the aircraft body so as to be capable of swinging 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. A first through hole 56d, a second through hole 56e, and projecting portions 56f, 56f are formed in the second locking pin 56A. The second locking pin 56A is configured to be slidable in the fuselage longitudinal direction along the support hole 55j of the locking mechanism 56. A first through hole 56d and a tip portion 56g are provided at both ends of the U-shaped second locking pin 56A. and are located. The end portion of the second locking pin 56A where the first through-hole 56d and the tip portion 56g are located faces laterally outward of the fuselage, but the end portion 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 the laterally inward side of the fuselage. A longitudinal intermediate portion between the U-shaped ends of the second locking pin 56A is located on the opposite side of the U-shaped ends across the support hole 56j in the fuselage longitudinal direction. The projecting portions 56f, 56f are located on the front side of the body from the support hole 56j, and project to the outer diameter side from the inner diameter of the support hole 56j. The slide member 56B is fitted onto the second locking pin 56A on the rear side of the body relative to the support hole 56j.

The locking mechanism 56 is formed in a U shape with an open top when viewed in the front-rear direction. In other words, a concave portion is formed in the locking mechanism 56, and this concave portion is vertically recessed in a U-shape and configured to support the locked member 53 thereon.

A through hole 56i is formed in the locking mechanism 56 . A through hole 53i is formed in the member 53 to be locked. In a state in which the locked member 53 is placed and supported by the locking mechanism 56, the through holes 56i and the through holes 53i overlap in side view. In this state, the second locking pin 56A can lock the locked member 53 by inserting the tip portion 56g of the second locking pin 56A through the through hole 56i and the through hole 53i. .

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 support hole 56j from the second through hole 56e. The snap pin 56C is inserted through the two through holes 56e. As a result, the sliding of the slide member 56B is restricted by the snap pin 56C, and the sliding 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 does not come off from the through hole 56i and the through hole 53i, and the locked member 53 is locked to the second locking pin 56A. Thus, through holes 53i and 56i through which the second locking pin 56A can pass are formed in the locking mechanism 56 and the locked member 53, respectively.

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 in a state in which the member 53 to be locked is locked to the second locking pin 56A, the slide The member 56B is slidable in a region between a portion contacting the support hole 56j and a portion contacting the snap pin 56C inserted into the first through hole 56d. Along with this, the second locking pin 56A is formed between the support hole 56j and the protrusions 56f, 56f, and the snap pin 56C inserted into the support hole 56j and the first through hole 56d. It becomes possible to slide in the lateral direction of the fuselage over the area between the part sandwiched between and. Therefore, when the second locking pin 56A slides to the side where the projecting portions 56f, 56f are separated from the support hole 56j, the tip end portion 56g is pulled out of the through holes 56i and 53i, and the second locking pin 56g with respect to the locked member 53 is removed. The locked state of the second locking pin 56A is released. A separate snap pin may be previously inserted through the first through hole 56d, and the operator may simply remove the snap pin 56C from the second through hole 56e.

The member to be locked 53 is positioned right above the locking mechanism 56 when the canopy 50 is at the working position or the simple storage position. As a result, the member to be locked 53 enters the concave portion of the locking mechanism 56 , and the member to be locked 53 is mounted 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 be vertically swung, and the vertical height of the canopy 50 is firmly maintained even if the canopy 50 is blown by the wind.

In a state where the canopy 50 is at the retracted position, the locked member 53 is shifted to the rear side of the fuselage with respect to the locking mechanism 56 . For this reason, the front portion of the rear outer frame 50C or the fitting member 52, rather than the locked member 53, enters the concave portion of the locking mechanism 56, and the rear outer frame 50C is placed on and supported by the locking mechanism 56. be done. In this state, the second locking pin 56A cannot lock the locked member 53. However, when the canopy 50 is stored in a barn with a low ceiling or the like, the wind hardly blows the canopy 50. A structure in which the outer frame 50C is mounted and supported on the locking mechanism 56 is sufficient. The second locking pin 56A may be configured to lock the locked member 53 even when the canopy 50 is at the retracted 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 exemplified in the above embodiments, and other representative embodiments of the present invention will be exemplified below.

(1) In the above-described embodiment, the canopy 50 is configured to be switchable among the working position shown in FIG. 1, the simple storage position shown in FIG. 9, and the storage position shown in FIG. but not limited to this embodiment. For example, the simple retracted position shown in FIG. 9 may be the retracted position, and the configuration may be such that switching to the retracted position shown in FIG. 9 is not possible. That is, the canopy 50 may be configured to be switchable between only two positions, the working position shown in FIG. 1 and the simple storage position as the storage position shown in FIG.

Also, the position of the canopy 50 may be configured such that it cannot be switched to the simple storage position shown in FIG. That is, the canopy 50 may be configured to be switchable between only two positions, the working position shown in FIG. 1 and the simple storage position as the storage position shown in FIG.

Furthermore, the simple storage position shown in FIG. 9 may be the working position, and the configuration may be such that it cannot be switched to the working position shown in FIG. That is, the canopy 50 may be configured to be switchable between only two positions, the simple retracted position as the working position shown in FIG. 9 and the retracted position shown in FIG.

In short, the canopy 50 can change the vertical height of the upper end of the second support portion 54A as the rear support portion so that the rider riding on the riding portion 25 can perform farm work at a working position, It suffices if it is configured to be switchable between the storage position positioned lower than the working position.

(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 (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 frames 50A and 50B and the rear outer frame 50C. The hood 58 covers the outer frame of the canopy 50 from above, and the outer peripheral edge of the hood 58 is wrapped around the outer frame of the canopy 50 . Then, the outer peripheral edge of the canopy 58 is engaged with the lower surface of the canopy 58 while being wound inside the outer frame of the canopy 50 .

As a method for locking the outer peripheral edge 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 hook-and-loop fastener 58A is provided at the outer peripheral end on the front side of the fuselage, and a second locking portion 58A is provided on the outer peripheral end on the rear side of the fuselage with a magnet. A locking portion 58B is provided. In other words, the first locking portion 58A can be adhered to the inner lower surface of the hood 58 with a hook-and-loop fastener, and the second locking portion 58B can be attracted between the inner sides of the hood 58 with a magnet. Alternatively, the outer surface or the lower surface of the rear outer frame 50C may be provided with a substance that reacts to magnetic force, and the second locking portion 58B may be wound around and attracted to the outer surface or the lower surface of the rear outer frame 50C. good.

In the embodiment illustrated in FIG. 15, the attraction force of the magnet of the second locking portion 58B is set weaker than the adhesive force of the hook-and-loop fastener of the first locking portion 58A. That is, for example, when the canopy 50 is blown by the wind and the hood 58 receives wind pressure, the second locking portion 58B is configured so that the attraction of the magnet at the second locking portion 58B is easily released. Therefore, when the canopy 50 is blown by the wind, the winding of the outer peripheral end of the hood 58 on the outer frame of the canopy 50 on the rear side of the fuselage is released, and the fuselage rear side of the hood 58 is swept away by the wind. Further, since the hook-and-loop fastener of the first engaging portion 58A is tightly wound around the outer frame of the canopy 50 on the front side of the fuselage, the hood 58 is prevented from being blown away by the wind. 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 side of the hood 58 due to the configuration in which only the rear portion of the hood 58 is blown away by the wind. Therefore, it is possible to prevent the frame of the canopy 50 from being damaged, and the farm working machine from being blown by the wind to interfere with the steering operation.

Further, in the embodiment illustrated in FIG. 15, even if only the portions corresponding to the pair of left and right corners of the rear outer frame 50C in the second locking portion 58B can be bonded with a hook-and-loop fastener. good. In this case, the adhesive strength of the hook-and-loop fastener on the second locking portion 58B may be weaker than the adhesive strength of the hook-and-loop fastener on the first locking portion 58A. Further, the adhesive force of the hook-and-loop fastener in the second locking portion 58B may be stronger than the attractive force of the magnet. With this configuration, it is possible to reduce the possibility that the canopy 50 is frequently blown by the weak wind and the magnet is frequently disengaged from the second locking portion 58B, and the canopy 50 is blown by the wind stronger than the predetermined strength. In this case, a configuration in which the rear portion of the hood 58 is swept away by the wind can be realized.

(3) In the above-described embodiment, the first frame 32 as the front support section may be configured integrally with the support strut frame 15 . That is, the front support portion may be configured by the first frame 32 and the support strut frame 15 . In addition, in the above-described embodiment, the front support portions are configured as a pair of left and right, but the front support portions may not be a pair of left and right. For example, a configuration in which one first frame 32 and one support strut frame 15 are erected from the left-right center of the fuselage may be employed. Further, the connecting portion 33 may be connected and supported to the upper portion of the first frame 32 so as to be swingable, and the free end portion of the connecting portion 33 may be configured to swing up and down.

(4) In the above-described embodiment, the rear support portions are configured as a pair of left and right, but the rear support portions need not be a pair of left and right. For example, one second support portion 54A and one first support portion 54B may be configured to stand from the left-right center of the body. Furthermore, the canopy 50 may be placed and supported on the second support portion 54A at the left-right central 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 a pair of left and right rear support portions are provided behind the vehicle body relative to the step 35 for getting on and off. not. The second support portion 54A and the first support portion 54B may be provided in front of the body of the step 35 for getting on and off.

(6) In the above-described embodiment, the second support portion 54A and the first support portion 54B as a pair of left and right rear support portions are located inside the body of the seedling planting device W relative to the left and right end portions. The form is not limited. The second support portion 54A and the first support portion 54B may be positioned outside the body of the seedling planting device W with respect to the left and right end portions thereof.

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

(8) In the embodiment described above, 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 top end of the canopy 50 .

(9) In the above-described embodiments, the seedling planting device W was shown as the working device, but the working device may be a seeding device, a fertilizing device, or a chemical spraying device. It can be.

(10) The configuration is not limited to the embodiment described above, and the configuration may be such that the passenger on board the riding section 25 can perform some work even when the canopy 50 is in the retracted position. For example, a portion of the hood 58 of the canopy 50 located directly above the boarding seat 26 is configured to be openable and closable, and even if the canopy 50 is in the retracted position, the passenger can sit on the boarding seat 26. The canopy 50 may be configured as such. At this time, the rear outer frame 50C, the front lateral frame 50D, and the rear lateral frame 50E located right above the boarding seat 26 may be detachable.

(11) The present invention can also be applied to rice transplanters, sowing machines, and ride-on tending machines, and the field work machines of the present invention include rice transplanters, seeding machines, and riding tending machines.

It should be noted that the configurations disclosed in the above-described embodiments (including other embodiments; the same shall apply hereinafter) can be applied in combination with configurations disclosed in other embodiments unless there is a contradiction. Moreover, the embodiments disclosed in this specification are merely examples, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the scope of the present invention.

INDUSTRIAL APPLICABILITY The present invention is applicable to field work machines having a canopy covering a riding section.

25: Boarding section 32: First frame (front support section)
33: Connection part 34: Satellite positioning unit 35: Step for getting on and off 50: Canopy 54A: Second support part (rear support part)
54B: first support (rear support)
55: Holding mechanism C: Traveling machine body W: Seedling planting device (working device)

Claims (7)

a traveling machine capable of traveling in a field;
a working 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 farm field, and that is capable of working on the farm field;
a riding section provided on the traveling body across the width of the traveling body;
a front support portion erected on a front portion of the traveling body;
a rear support part erected at the rear part of the traveling body and 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 whose free end portion is capable of swinging up and down;
a canopy that is rockably supported by the connecting portion and mounted and supported by the rear support portion and covers the riding portion from above;
By changing the vertical height of the upper end of the rear support part and changing the vertical height of the free end part of the connecting part, the canopy enables a rider on the riding part to perform farm work. and a storage position located lower than the working position across the front and rear of the canopy . a traveling machine capable of traveling in a field;
a working 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 farm field, and that is capable of working on the farm field;
a riding section provided on the traveling body across the width of the traveling body;
a front support portion erected on a front portion of the traveling body;
a rear support part erected at the rear part of the traveling body and 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 whose free end portion is capable of swinging up and down;
a canopy supported by the connecting portion and supported by the rear support portion to cover the riding portion from above;
a satellite positioning unit supported by the connecting portion and capable of detecting the position of the traveling aircraft using a navigation satellite ;
By changing the vertical height of the upper end of the rear support portion, the canopy can be positioned at a working position at a vertical height at which a rider on the riding portion can perform agricultural work, and at a position lower than the working position. A farm working machine configured to be switchable between a storage position and a storage position . 3. A state in which said canopy is switched to said retracted position, said connecting portion is in a state of being swung downward, and said satellite positioning unit is positioned below an upper end portion of said front support portion. 2. The field working machine according to 2. The field working machine according to claim 2 or 3 , wherein the upper end of the canopy in the working position is located higher than the upper end of the satellite positioning unit. The canopy has a vertical height at which a passenger on board the riding section can work, and is configured to be switchable to a simple storage position located lower than the working position,
The field working machine according to any one of claims 2 to 4 , wherein a vertical height of the upper end of the canopy in the simple storage position is positioned lower than the upper end of the satellite positioning unit. a pair of left and right rear support portions;
a pair of right and left steps for boarding and alighting, with which a passenger can get on and off the boarding section from left and right sides;
The field working machine according to any one of claims 1 to 5 , wherein the pair of left and right rear support portions are positioned rearward of the body from the step for getting on and off and further inside the body than both left and right end portions of the working device. . The rear support portion includes a first support portion erected at the rear portion of the traveling body, and a second support portion extending above the first support portion and capable of changing a height position with respect to the first support portion. and a holding mechanism provided on the first support and capable of holding the position of the second support,
The field working machine according to any one of claims 1 to 6 , wherein the vertical height of the holding mechanism is positioned lower than the upper end portion of the working device when the working device is raised to the maximum.

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