WO2023120190A1 - Paddy field work machine - Google Patents

Abstract

This paddy field work machine comprises a step 43 provided in a rear part of a machine body in a position higher than a floor 38, and a driver seat 60 arranged in front of the step 43. This paddy field work machine further comprises a backrest portion 87 provided on the step 43 behind the driver seat 60 between the driver seat 60 and a rear end of the step 43.

Description

Paddy work machine

The present invention relates to a paddy field work machine such as a ride-on rice transplanter and a ride-on direct seeder.

In a riding-type rice transplanter, which is an example of a paddy field working machine, as disclosed in Patent Document 1, a seedling planting device (corresponding to a working device) is attached to a link mechanism extending rearward from the rear of the machine body. is supported and a large step is provided at a position higher than the floor at the rear of the fuselage.
Since the worker stands on the step to replenish the seedling planting device with seedlings, if the step is configured to be large, it becomes easier to replenish the seedlings to the seedling planting device.

Japanese Patent Application Laid-Open No. 2017-13759

In the riding-type rice transplanter, the mat-shaped seedlings supplied to the seedling planting device are relatively heavy, and if a large number of seedlings are supplied to the seedling planting device, a heavy burden is placed on the operator. There is room for improvement in terms of reducing the labor required for replenishing seedlings.
SUMMARY OF THE INVENTION An object of the present invention is to reduce the burden on a worker at a step provided at the rear of the body of a paddy field work machine when the worker replenishes the work device.

The paddy field work machine of the present invention includes a link mechanism extending rearward from a rear part of the machine body, a working device supported by the link mechanism, a floor provided on the machine body, and a rear part of the machine body. a step provided at a position higher than the floor; and a driver's seat disposed in front of the step. Behind the driver's seat, the driver's seat and the rear end of the step A seat provided on the step is provided so as to be positioned therebetween.

According to the present invention, when replenishing the working device, the worker can sit on the seat while placing his or her feet on the rear portion of the step, so that the operator can comfortably move backward without interfering with the driver's seat. You can take a facing position.
As a result, the worker can easily replenish the working device while sitting on the seat, thereby reducing the burden on the worker.

In the present invention, it is preferable that the seat has a width larger than that of the driver's seat and is provided along the left-right direction.

In the paddy field working machine, the working device has a relatively large width.
According to the present invention, the seat has a width larger than that of the driver's seat and is provided along the left-right direction. Thus, by sitting on the right side of the seat, the worker can easily replenish the right side of the work device, and by sitting on the left side of the seat, the worker can easily replenish the left side of the work device. Since the replenishment work can be performed easily, it is advantageous in lightening the burden on the operator.

In the present invention, the right end of the seat is positioned closer to the left-right center of the step than the right end of the step, and the left end of the seat is closer to the left-right center of the step than the left end of the step. is preferably located at

According to the present invention, the right end of the seat is positioned closer to the left-right center of the step than the right end of the step, the left end of the seat is positioned closer to the left-right center of the step than the left end of the step, and the step Passages are formed at the right and left ends of the .
As a result, the worker can walk back and forth in the vicinity of the right and left ends of the step, resulting in good workability.

In the present invention, the seat portion includes a rod-shaped horizontal portion extending in the left-right direction, a rod-shaped right leg portion extending downward from the right portion of the horizontal portion and attached to the step, and the horizontal portion. It preferably has a rod-shaped left leg extending downward from the left and attached to the step.

According to the invention, the seat is arched with a bar-like lateral portion, a right leg and a left leg, so that the lateral portion of the seat is open below.
As a result, materials to be supplied to the working device (for example, seedlings in a seedling planting device and seeds in a seeding device) can be placed on the lower portion of the seat (lateral portion) of the step, improving workability. is advantageous.

In the present invention, a step frame is provided to support the step from below, and the lower part of the right leg is attached to the step frame so that the step is sandwiched between the lower part of the right leg and the step frame. The lower portion of the right leg is attached to the step by being attached to the step, and the lower portion of the left leg is attached to the step such that the step is sandwiched between the lower portion of the left leg and the step frame. It is preferable that the lower part of the left leg is attached to the step by being attached to the frame.

According to the present invention, when a step frame is provided to support the step from below, and the lower portions of the right leg and left leg of the seat are attached to the step frame, the right leg and left leg of the seat are mounted on the step frame. Since the step is sandwiched between the lower part and the step frame, it is advantageous in terms of improving the supporting strength of the step.

In the present invention, an opening for a worker to see the rear wheel for running under the step, and a plurality of crosspieces provided in the opening so as to be arranged side by side with intervals in the horizontal direction. is provided in the step, is arranged along the vertical direction between the adjacent crosspieces in the opening, and is attached across the lower part of the right leg part, the lower part of the left leg part, and the step frame. It is preferable that the cross section is sandwiched between the lower part of the right leg part and the lower part of the left leg part and the step frame by tightening the bolt.

In a paddy field work machine, an opening is provided in the step, and a plurality of crosspieces are sometimes provided in the opening of the step so that they are lined up with intervals along the horizontal direction. As a result, the worker can see the rear wheels for traveling below the step through the opening (between the crosspieces) of the step and can walk on the opening (crosspiece) of the step.

According to the invention, bolts are arranged along the vertical direction between adjacent crosspieces in the opening of the step and are attached across the lower right leg and lower left leg of the seat and the step frame. By tightening the bolts, the crosspiece of the step is sandwiched between the lower right and left leg portions of the seat and the step frame.

As a result, by effectively utilizing the existing openings and crosspieces of the steps and attaching the lower right and left leg portions of the seat to the step, a large space for attaching the seat can be obtained. This is advantageous in terms of structural simplification because it is not necessary to perform processing step by step.

In the present invention, a lower frame is provided in the vicinity of the upper portion of the rear portion of the step along the left-right direction, and is provided in the vicinity of the upper portion of the right and left lateral portions of the step along the front-rear direction. It is preferable to have

When material to be supplied to the working device (e.g. seedlings in a seedling planting device, seeds in a sowing device) is placed on the step, according to the invention, the material will fall outward from the rear or right and left sides of the step. Even so, since the material is easily stopped by the lower frame, it is less likely that the material will fall outside from the step.

In the present invention, it is preferable that an upper frame provided along the lower frame in the left-right direction and the front-rear direction is provided at a position spaced upward from the lower frame by a predetermined distance.

According to the present invention, when a worker replenishes a work device, the worker can temporarily place materials on the upper frame or replenish the work device while placing materials on the upper frame. This is advantageous in terms of reducing the burden on

In the present invention, it is preferable that the upper portion of the rear portion of the step in the upper frame is arranged on the rear side of the upper portion of the rear portion of the step in the lower frame.

According to the present invention, when the worker replenishes the working device while placing materials on the upper portion of the rear portion of the step on the upper frame, the upper portion of the rear portion of the step on the upper frame is positioned near the rear working device. be provided. As a result, it is possible to easily replenish the work device with materials, which is advantageous in terms of reducing the burden on the worker.

In the present invention, right and left handrail frames are provided laterally outwardly with respect to the right and left parts of the step and forwardly with respect to the upper frame and the lower frame, It is preferable that the upper frame and the lower frame are attached to the handrail frame, and a height adjuster is provided that can vertically change the attachment position of the handrail frame in the upper frame and the lower frame.

In accordance with the present invention, the right and left handrail frames are provided in laterally outward positions relative to the right and left portions of the steps and in forward positions relative to the upper frame, so that the operator can By holding, you can stabilize your body.

According to the present invention, the upper frame and the lower frame are attached to the handrail frame, and the handrail frame also has the function of supporting the upper frame and the lower frame, which is advantageous in terms of structural simplification. .
According to the present invention, the mounting position of the handrail frame on the upper frame and the lower frame can be changed vertically, and the upper frame and the lower frame can be arranged at appropriate heights, so workability can be improved. is advantageous.

It is a left side view of a riding type rice transplanter. It is a top view of a riding-type rice transplanter. It is a top view near a step. It is a rear view near a step. FIG. 4 is a plan view of the vicinity of the right and left floor frames; FIG. 4 is a plan view of the body frame, the front step frame, and the rear step frame. Fig. 3 is a left side view of the vicinity of the body frame, floor frame, front step frame and rear step frame; FIG. 3 is a longitudinal front view of the vicinity of a spring receiving member and a suspension spring; FIG. 5 is a cross-sectional plan view of the vicinity of the spring receiving member; It is a right side view near a fuel tank. FIG. 4 is a perspective view of a right step and a left step; It is a top view of a right step and a left step. It is a bottom view of a right step and a left step. It is a longitudinal front view near the right step and the left step. It is a longitudinal left side view near the right leg part and the left leg part of a seat part. FIG. 11 is a plan view of the rear step; It is a bottom view of a back step. It is a longitudinal rear view of a rear step. FIG. 11 is a plan view of the rear step; FIG. 10 is a perspective view of a lateral step; FIG. 4 is a plan view of a lateral step; It is a right view of a horizontal step. It is a right view of a bonnet. It is a left view of a bonnet. It is a longitudinal front view of right and left side panels. FIG. 10 shows a right side panel opening and a left side panel opening; It is a left side view near an engine and a transmission case. It is a top view near an engine and a transmission case. In the 1st alternative form of implementation of invention, it is a vertical front view near a fertilizing apparatus. In the 1st alternative form of implementation of invention, it is a rear view near a fertilizing apparatus. In the 1st alternative form of implementation of invention, it is a left side view of the vicinity of a fertilizing apparatus. In the 1st alternative form of implementation of invention, it is a longitudinal left side view of the vicinity of a fertilizing apparatus.

1 to 32 show a riding-type rice transplanter that is an example of a paddy field work machine. In FIGS. 1 to 32, F indicates the forward direction, B indicates the rearward direction, and U indicates the upward direction. , D indicates the downward direction, R indicates the right direction, and L indicates the left direction.

(Overall configuration of ride-on rice transplanter)
As shown in FIGS. 1 and 2, a body frame 3 as a body is supported by right and left front wheels 1 for running and right and left rear wheels 2 for running. A link mechanism 4 extends rearward from the rear portion of the body frame 3 , and a seedling planting device 5 as a working device is supported on the rear portion of the link mechanism 4 .

As shown in FIGS. 1 and 5 , the mission case 25 is connected to the front portion of the body frame 3 , and a support frame 42 having a frame shape in plan view is connected to the front portion of the mission case 25 . and extends forward.

An engine 49 is supported by the support frame 42 and provided in the front part of the body frame 3, and a bonnet 58 that accommodates the engine 49 is provided. A steering handle 59 for steering the front wheels 1 is provided behind the bonnet 58 .

As shown in FIGS. 1 and 2 , the floor 38 is provided on the body frame 3 , and the step 43 is provided on the rear part of the body frame 3 so as to be positioned higher than the floor 38 . A driver's seat 60 is arranged in the left-right central part of the front part of the step 43 , and a seat part 87 is provided on the step 43 .

(Structure of seedling planting device and spare seedling tray)
As shown in FIGS. 1 and 2, the seedling planting device 5 includes four planting transmission cases 6 supported at the rear of the link mechanism 4, and four rear right and left parts of the planting transmission case 6. It has a rotating case 7 rotatably supported, a pair of planting arms 8 supported by the rotating case 7, a plurality of floats 9, and a seedling placement base 10, and is configured in an eight-row planting type. there is

The right and left support frames 61 are connected to the right and left portions of the support frame 42 and extend upward laterally outward of the right front portion and laterally outward of the left front portion of the floor 38, A spare seedling mount 62 is attached to the top of the support frame 61 . A preliminary seedling loading table 63 is attached to the lower part of the support frame 61, a preliminary seedling loading table 64 is attached to the front part of the preliminary seedling loading table 63 so as to be able to swing up and down, and a preliminary seedling loading table 65 is It is attached to the rear part of the spare seedling placing table 63 so as to be able to swing up and down.

(Composition of machine frame)
As shown in FIGS. 5, 6 and 7, the right and left body frames 3 are arranged along the front-rear direction, and the body frames 3 are made of square pipes having a square cross section. The right and left connecting portions 11 are connected downward to the front portion of the body frame 3 , and the right and left frames 12 are connected across the lower portion of the connecting portion 11 and the front and rear intermediate portions of the body frame 3 . there is A mission case 25 is connected to the front portion of the body frame 3 and the connecting portion 11 .

Right and left flat plate-shaped vertical frames 13 and right and left square pipe-shaped vertical frames 14, 15, and 16 are connected to the body frame 3 and extend upward from the body frame 3. . Right and left rectangular pipe-shaped horizontal frames 17 are connected along the front-rear direction over the upper portions of the vertical frames 13 , 14 , 15 . Right and left rectangular pipe-shaped horizontal frames 18 are connected along the front-rear direction over the upper portions of the vertical frames 15 and 16 .

A square pipe-shaped horizontal frame 19 is connected along the left-right direction across the lower part of the body frame 3 and the vertical frame 13 . A rectangular pipe-shaped horizontal frame 21 is connected along the horizontal direction across the horizontal frame 17 , and a rectangular pipe-shaped horizontal frame 22 is connected along the horizontal direction across the upper portion of the vertical frame 16 . An angle-shaped horizontal frame 23 (see FIG. 8) is connected along the left-right direction across the rear portion of the body frame 3 .

The upper link 4a of the link mechanism 4 is supported on the upper portion of the vertical frame 16 and extends rearward so as to be vertically swingable about an axis P1 extending in the left-right direction. A lower link 4b of the link mechanism 4 is supported by the rear portion of the body frame 3 and extends rearward so as to be vertically swingable about an axis P2 extending in the left-right direction.

A hydraulic cylinder 24 is connected across the position of the axis P1 of the vertical frame 16 and the rear part of the lower link 4b of the link mechanism 4, and the link mechanism 4 is operated to swing up and down by the expansion and contraction operation of the hydraulic cylinder 24. be done.
With the above configuration, the link mechanism 4 (upper link 4a and lower link 4b) is supported by the rear portion (vertical frame 16) of the body frame 3 and extends rearward.

(Configuration of support for front and rear wheels)
As shown in FIGS. 1 and 5, the right and left front axle cases 26 are connected to the right and left portions of the transmission case 25 and extend laterally outward on the right and left sides. A left front wheel 1 is steerably supported by a front axle case 26 .

As shown in FIGS. 1 and 7, rear axle cases 27 are provided to support the right and left rear wheels 2 . The right and left brackets 28 are connected to the front-rear intermediate portion of the body frame 3, and the right and left upper links 29 are supported by the brackets 28 so as to be capable of swinging up and down around an axis P3 extending in the left-right direction. and extends rearward. The right and left lower links 30 are supported by the lower portion of the connecting portion 11 and extend rearward so as to be vertically swingable about an axis P4 extending in the left-right direction.

As shown in FIGS. 7 and 8, the rear portion of the upper link 29 is connected to the upper portion of the front portion of the rear axle case 27 so as to be able to swing vertically, and the rear portion of the lower link 30 is connected to the front portion of the rear axle case 27. It is connected to a connection pin 20 at the bottom of the part so that it can swing up and down.

A bracket 31 is connected downward to the rear part of the right body frame 3 . The lateral rod 32 is supported by a bracket 31 so as to be vertically swingable about an axis P5 extending in the front-rear direction, and extends leftward. It is connected to the rear part of the case 27 so that it can swing up and down.

Right and left spring receiving members 33 are attached to the rear of the body frame 3 and right and left coiled suspension springs 34 are attached across the spring receiving members 33 and connecting pins 20 of the rear axle case 27 . A rear axle case 27 is supported by the body frame 3 via a suspension spring 34 .

With the above configuration, the right and left upper links 29, the right and left lower links 30, the lateral rods 32, and the right and left suspension springs 34 constitute a five-link type suspension mechanism. is supported by the body frame 3 via a suspension mechanism.

(Structure of Spring Receiving Member)
As shown in FIGS. 8 and 9, the spring receiving member 33 is formed of a flat plate, and is bent upward at a main body portion 33a extending in the left-right direction and a right front portion and a right rear portion of the main body portion 33a. It has a right mounting portion 33b and a left mounting portion 33c in which the left front portion and the left rear portion of the body portion 33a are bent upward.

A body portion 33 a of the spring receiving member 33 is attached to the lower portion 3 a of the body frame 3 by welding, extends rightward from the right side portion 3 b of the body frame 3 , and extends to the left side of the body frame 3 . It extends leftward from the portion 3c.

The right attachment portion 33b of the spring receiving member 33 is attached to the right side portion 3b of the body frame 3 by welding. As a result, the spring receiving member 33 extends rightward from the right side portion 3b of the body frame 3 in the body portion 33a of the spring receiving member 33 and the right side portion 3b of the body frame 3. A right attachment portion 33b of the member 33 is attached.

The left attachment portion 33c of the spring bearing member 33 is attached to the left side portion 3c of the body frame 3 by welding. As a result, the spring receiving member 33 has a portion extending leftward from the left side portion 3c of the body frame 3 in the body portion 33a of the spring receiving member 33 and the left side portion 3c of the body frame 3. The left attachment portion 33c of the member 33 is attached.

Right and left flat connecting members 35 are provided, and cylindrical portions 35a are connected to the connecting members 35 downward. The right and left rods 36 are attached to the connection pins 20 of the rear axle case 27 and extend upward. inserted.

The cylindrical portion 35a and the rod 36 of the connecting member 35 are arranged inside the suspension spring 34, the upper portion of the suspension spring 34 is abutted against the connecting member 35, and the connecting member 35 is attached to the spring receiving member 33 by the bolt 37. It is connected to the body portion 33a.
The right and left spring receiving members 33 and the right and left connecting members 35 are symmetrical and have the same structure.

(Arrangement of Attachment of Vertical Frame and Spring Receiving Member)
As shown in FIGS. 8 and 9, the lower portion of the vertical frame 15 (see the above-mentioned (construction of the body frame) and FIGS. 6 and 7) is cut out, and the horizontal portion 15a and the An extending portion 15b extending downward from the lateral portion 15a is formed, and a slit 15c is formed in the extending portion 15b.

The lateral portion 15a of the vertical frame 15 is attached to the upper portion 3d of the body frame 3 by welding. The left mounting portion 33c of the spring receiving member 33 is inserted into the slit 15c of the vertical frame 15, and the horizontal portion of the extending portion 15b of the vertical frame 15 is brought into contact with the left side portion 3c of the body frame 3 and welded. is installed by The lower portion of the extension portion 15b of the vertical frame 15 is attached to the body portion 33a of the spring bearing member 33 by welding.

The lower portions of the right and left vertical frames 15 are symmetrical and have the same structure. The mounting structure between the lower portion of the right vertical frame 15 and the right spring receiving member 33 and the mounting structure between the lower portion of the left vertical frame 15 and the left spring receiving member 33 are symmetrical and have the same structure. have.

With the above configuration, the lower portion of the vertical frame 15 is arranged from the upper portion 3d of the body frame 3, the side portions 3b and 3c of the body frame 3, and the side portions 3b and 3c of the body frame 3 in the body portion 33a of the spring bearing member 33. The lower portion of the vertical frame 15 is attached across the spring receiving member 33 and the body frame 3 . The vertical frame 15 is attached to the spring bearing member 33 and extends upward from the spring bearing member 33 .

(Overall composition of the floor)
As shown in FIGS. 1 and 2, the floor 38 has a front floor 39 , a right floor 40 and a left floor 41 . A rubber floor mat (not shown) is placed across the right floor 40 and the left floor 41 .

The front floor 39 is integrally made of synthetic resin, is provided over the right side area and the left side area with respect to the bonnet 58, and has a bilaterally symmetrical shape. An opening 39a is formed in a portion of the front floor 39 above the front wheel 1 so that a plurality of crosspieces are arranged side by side at intervals. The operator can see the front wheel 1 (see FIG. 1) through the opening 39a of the front floor 39. As shown in FIG.

A right floor 40 is provided so as to be continuous with the right rear portion of the front floor 39 , and a left floor 41 is provided so as to be continuous with the left rear portion of the front floor 39 . The right floor 40 and the left floor 41 are integrally made of synthetic resin and have a bilaterally symmetrical shape.

Openings 40a and 41a are formed in portions of the right floor 40 and the left floor 41 above the front wheel 1 so that a plurality of crosspieces are arranged side by side with a space therebetween.
The operator can see the front wheel 1 (see FIG. 1) through the openings 40a and 41a of the right floor 40 and the left floor 41. As shown in FIG.

(Structure of floor frame supporting floor)
As shown in FIGS. 5, 6 and 7, right and left floor frames 50 are provided across the right and left fuselage frame 3 and the support frame 42, the right and left floor frames 50 being bilaterally symmetrical. configured in shape.

The floor frame 50 is provided with lateral frames 51 and 52 extending in the left-right direction, and three frames 53 extending in the front-rear direction are connected across the lateral frames 51 and 52. The ends are connected to the body frame 3 . A footrest 70 (see FIGS. 1 and 2) is connected across the lateral frame 51 and the outermost frame 53 when a worker gets on and off.

Two frames 54 extending in the front-rear direction are connected to the horizontal frame 52 and extended forward, and a horizontal frame 55 extending in the left-right direction connects the outermost frame 53 and the frame 54 . It is A frame 56 extending in the front-rear direction is connected to the horizontal frame 55 and extends forward, and a horizontal frame 57 extending in the left-right direction is connected across the front portions of the frames 54 and 56 to extend forward. The ends of frame 57 are connected to the front of support frame 42 .

With the above configuration, in the floor 38, the right portion of the front floor 39 and the right floor 40 are attached to the right floor frame 50 and supported by the right floor frame 50 from below. The left portion of the front floor 39 and the left floor 41 are attached to the left floor frame 50 and supported by the left floor frame 50 from below.

(Overall configuration of steps)
As shown in FIGS. 1, 2 and 3, the steps 43 include a front right step 44, a front left step 45, right and left rear steps 46, and right and left rear steps 47. , right and left lateral steps 48 .

(Configuration of right step and left step in step)
As shown in FIGS. 11 and 12, the right step 44 and left step 45 have upper surface portions 44a and 45a, front surface portions 44b and 45b, lateral surface portions 44c and 44c, and extension portions 44d and 45d. , and is integrally made of synthetic resin, and has a symmetrical shape except for a portion.

The openings 44e and 45e are opened in the upper surface parts 44a and 45a, and a plurality of crosspieces 44f and 45f are provided in the openings 44e and 45e so as to be arranged side by side with a space therebetween. The openings 44e and 45e are located above the rear wheel 2 (see FIG. 1), and the operator can see the rear wheel 2 through the openings 44e and 45e of the right step 44 and left step 45. .

The front parts 44b, 45b are connected to the front parts of the upper surface parts 44a, 45a and extend downward. The lateral surface portions 44c, 45c are connected across the lateral portions of the upper surface portions 44a, 45a and the lateral portions of the front surface portions 44b, 45b. The extending portions 44d and 45d are connected to the lower portions of the front portions 44b and 45b and extend forward. Notch portions 44g and 45g are provided across the upper surface portions 44a and 45a and the front surface portions 44b and 45b.

Wall portions 44h and 45h are formed on the lateral portions of the upper surface portions 44a and 45a along the front-rear direction so as to be higher than the upper surface portions 44a and 45a. Wall portions 44i and 45i are formed in the left-right direction at rear portions of the upper surface portions 44a and 45a so as to be higher than the upper surface portions 44a and 45a.
In the right step 44, a projecting portion 44q projecting forward is provided on the lateral portion of the front surface portion 44b, and an opening portion 44r is formed in the upper portion of the projecting portion 44q.

As shown in FIGS. 11 to 14, a plurality of projecting portions 44j, 45j, 44k, and 45k projecting downward are provided on the lower surface portions of the upper surface portions 44a and 45a and the lower portions of the extension portions 44d and 45d. A large number of vertical wall- like ribs 44m, 45m are provided along the front-back direction, the left-right direction, and the oblique direction over the projecting portions 44j, 45j, 44k, 45k.

The projecting portions 44j and 45j are formed so as to be recessed downward from the upper surface portions 44a and 45a and the extending portions 44d and 45d. Projections 44j and 45j are open upward. Small openings 44n, 45n and draining portions 44p, 45p are formed at the bottoms of the projecting portions 44j, 45j.

The protruding portions 44k, 45k are formed in a cylindrical shape extending downward from the upper surface portions 44a, 45a and the extending portions 44d, 45d, and are open downward. The bottoms of the protrusions 44j and 45j and the lower ends of the protrusions 44k and 45k are set at the same height, and the lower ends of the ribs 44m and 45m are aligned with the bottoms of the protrusions 44j and 45j and the protrusion 44k. , 45k.

(Construction of a post-step in a step)
As shown in FIGS. 16, 17 and 18, the right rear step 46 and the left rear step 46 are the same, and the rear step 46 is integrally made of synthetic resin and has a bilaterally symmetrical shape. It is

In the rear step 46, a main body portion 46a is provided, an opening 46b is opened in the left and right central portion of the main body portion 46a, and a plurality of crosspieces 46c are opened so as to be lined up with intervals along the lateral direction. It is provided in the portion 46b. The opening 46b is located above the rear wheel 2, and the operator can see the rear wheel 2 (see FIG. 1) through the opening 46b of the rear step 46. As shown in FIG.

A plurality of projecting portions 46d and 46e projecting downward are provided at the lower portion of the main body portion 46a. are set along.

The projecting portion 46d is formed so as to be recessed downward from the main body portion 46a. . A small opening 46g and a drainage portion 46h are opened at the bottom of the projecting portion 46d.

The projecting portion 46e is formed in a cylindrical shape extending downward from the main body portion 46a and is open downward. The bottom of the projecting portion 46d, the lower end of the projecting portion 46e, and the lower end of the rib 46f are set at the same height.

As shown in FIG. 19, the right rear step 47 and the left rear step 47 are the same, and the rear step 47 is integrally formed of synthetic resin and has a bilaterally symmetrical shape.
The rear step 47 is provided with the same body portion 47a, opening 47b, crosspiece 47c and projection 47d as the main body 46a, opening 46b, crosspiece 46c and projection 46d of the rear step 46. The same projections (not shown), ribs (not shown), openings (not shown) and drains (not shown) as the projections 46e, ribs 46f, openings 46g and drains 46h are provided. It is

In the step 47, a wall portion 47i is formed along the left-right direction at the rear portion of the body portion 47a so as to be higher than the body portion 47a. The rear step 47 has the same shape as the rear step 46 except that it has a wall portion 47i.

(Structure of horizontal step in step)
As shown in FIGS. 20, 21 and 22, the horizontal step 48 has a first portion 48a and a second portion 48b which are separated from each other, and the first portion 48a and the second portion 48b are integrally made of synthetic resin. is structured. In the right and left lateral steps 48, the first portion 48a and the second portion 48b are identical.

The first portion 48a is configured by crosspieces arranged in a grid pattern along the front-rear direction and the left-right direction. formed along.

The second portion 48b is constructed by arranging crosspieces in a grid pattern along the front-rear direction and the left-right direction. formed along the direction

When the lateral step 48 is used as the right lateral step 48, the first portion 48a is set so that the wall portion 48c is located on the right lateral outer side and faces downward. The second portion 48b is arranged on the right side of the first portion 48a so that one wall portion 48d faces upward and the other wall portion 48d faces downward.

When the lateral step 48 is used as the left lateral step 48, the first portion 48a is reversed (reversed) with respect to the right first portion 48a so that the wall portion 48c faces the left lateral outside. Position it so that it faces downwards.
The second portion 48b is turned upside down with respect to the right second portion 48b (upside down) and arranged on the left side of the first portion 48a, with one wall portion 48d facing downward and the other wall portion 48b facing downward. The wall portion 48d is set to face upward.

(Overall Configuration of Step Frame Supporting Step)
As shown in FIGS. 6 and 7 , a step frame 66 is provided to support the step 43 from below, and the step frame 66 is supported by the body frame 3 .

As shown in FIGS. 6 and 7, the step frame 66 includes a front step frame 67 that supports the right step 44 and the left step 45 as front steps from below, and a rear step frame 67 that supports the rear steps 46 and 47 from below. 1, 4 and 31, it has a horizontal step frame 69 that supports the horizontal step 48 from below.

(Configuration of front step frame supporting right step and left step)
As shown in FIGS. 6 and 7, the front step frame 67 is provided with lateral frames 71 and 72 along the left-right direction, and the lateral frame 71 is attached with a mounting bracket 71a. A frame 73 extending in the front-rear direction is connected across the horizontal frames 71 and 72 .

A frame 74 extending in the front-rear direction is connected across the lateral ends of the lateral frames 71 and 72 and extends forward from the lateral frame 72 . A frame 75 extending in the front-rear direction is connected to the horizontal frame 72 and extends forward. A horizontal frame 76 extending in the left-right direction is connected across the front ends of the frames 74 and 75 . A receiving frame 77 extending in the front-rear direction is connected to the horizontal frame 71 and extends rearward.

In the front step frame 67 configured as described above, the horizontal frame 71 is attached to the upper portion of the right and left vertical frames 15 (see the above-mentioned (construction of the body frame)) and the right and left horizontal frames 17. Concatenated. A horizontal frame 72 is connected to the upper portions of the right and left vertical frames 14 and the right and left horizontal frames 17 .
Thereby, the step frame 66 (front step frame 67) is attached to the upper portion of the vertical frame 15 and attached to the upper portion of the vertical frame 14. As shown in FIG.

(Relationship between floor frame and step frame)
As shown in FIGS. 6 and 7 , right and left floor frames 50 are provided on the front portion of the body frame 3 . A front step frame 67 (step frame 66 ) is provided at the rear portion of the body frame 3 so as to be arranged at a position higher than the floor frame 50 .

A plurality of right connecting frames 79 extend over the right front portion (right lateral frame 76) of the step frame 66 (front step frame 67) and the right rear portion of the floor frame 50 (lateral frame 51 of the right floor frame 50). are installed along the vertical direction.

A plurality of left connecting frames 79 extend over the left front portion (left lateral frame 76) of the step frame 66 (front step frame 67) and the left rear portion of the floor frame 50 (lateral frame 51 of the left floor frame 50). are installed along the vertical direction.

As shown in FIG. 10, a fuel tank 80 is provided. The lower front portion of the fuel tank 80 is attached to the lateral frame 51 of the right floor frame 50 , and the upper rear portion of the fuel tank 80 is attached to the right portion of the lateral frame 72 of the front step frame 67 . Thereby, the fuel tank 80 is provided below the right front portion of the step frame 66 (the front step frame 67).
The right outermost connecting frame 79 is arranged along the vertical direction at the right laterally outer position with respect to the fuel tank 80 .

(Configuration of support for right step and left step in front step frame)
As described above (configuration of right step and left step in steps) and shown in FIGS. 44f and 45f are provided.

As shown in FIGS. 6 and 14, when the right step 44 and left step 45 are placed on the front step frame 67, the protrusions 44j, 45j, 44k, and 45k of the right step 44 and left step 45 are placed on the front step. It is mounted on the frames 73 , 75 of the frame 67 and the receiving frame 77 . The ribs 44m, 45m and crosspieces 44f, 45f of the right step 44 and left step 45 are placed on the lateral frames 71, 72 of the front step frame 67. As shown in FIG.
As a result, the right step 44 and the left step 45 are supported from below by the front step frame 67 (step frame 66).

As shown in FIG. 14, the bolt 81 enters the projections 44j and 45j of the right step 44 and the left step 45 at the projections 44j and 45j of the right step 44 and the left step 45, and the frames 73 and 75 of the front step frame 67 and the receiving frame 77.
Thereby, the right step 44 and the left step 45 are connected to the front step frame 67 (step frame 66).

(Configuration of Rear Step Frame for Supporting Rear Step)
As shown in FIGS. 6 and 7, the rear step frame 68 is provided with a horizontal frame 82 extending in the left-right direction, and a plurality of receiving frames 83 extending in the front-rear direction are connected to the horizontal frame 82 to connect to the front and rear frames. It extends backwards. A mounting bracket 84 is attached to the horizontal frame 82, and a mounting frame 85 is connected to the horizontal frame 82 and extends forward.

In the front step frame 67 and the rear step frame 68, the mounting bracket 84 of the rear step frame 68 is bolted to the rear portion of the lateral frame 18 (see (Construction of body frame) described above). The mounting frame 85 of the rear step frame 68 is bolted to the mounting bracket 71a of the lateral frame 71 of the front step frame 67 (see the above-mentioned (configuration of front step frame supporting right step and left step)).

As a result, the rear step frame 68 is attached to the front step frame 67, and the rear step frame 68 is attached to the upper portion of the vertical frame 15 (see the above-mentioned (construction of the body frame)) via the front step frame 67. and attached to the top of the vertical frame 14 .

(Configuration of support for rear step in rear step frame)
16 to 19, projecting portions 46d, 47d, 46e, ribs 46f, and crosspieces 46c, 47c are provided in the rear steps 46, 47, as described above (configuration of the rear steps in the steps) and shown in FIGS.

When the rear steps 46 and 47 are placed on the rear step frame 68, the protrusions 46d, 47d and 46e, the ribs 46f and the beams 46c and 47c of the rear steps 46 and 47 are placed on the receiving frame 83 of the rear step frame 68. be placed.
Thereby, the rear steps 46 and 47 are supported from below by the rear step frame 68 (step frame 66).

Similar to the above-described (structure of supporting the right step and the left step in the front step frame) and the right step 44 and the left step 45 shown in FIG. , and is attached across the projections 46d, 47d of the rear steps 46, 47 and the receiving frame 83 of the rear step frame 68. As shown in FIG.
Thereby, the rear steps 46 and 47 are connected to the rear step frame 68 (step frame 66).

(Structure of lateral step frame supporting lateral step)
As shown in FIGS. 1, 2, 3, 4 and 31, right and left handrail frames 86 are provided which are formed by bending a piece of pipe material.

A front lower portion 86a of the handrail frame 86 is connected to the horizontal frame 51 of the floor frame 50 (see the above-mentioned (floor frame structure for supporting the floor) and FIG. 5). A rear lower portion 86b of the handrail frame 86 is connected to the lateral frame 71 of the front step frame 67 (see the above-mentioned (configuration of the front step frame supporting the right and left steps) and FIG. 6).

The right and left lateral step frames 69 are arranged along the front-rear direction and connected to the rear lower part 86b of the handrail frame 86. The lateral step 48 (the first portion 48a and the second portion 48b) is bolted to the lateral step frame 69. As shown in FIG.

As a result, the right handrail frame 86 and the lateral step frame 69 and the left handrail frame 86 and the lateral step frame 69 are configured in a bilaterally symmetrical shape. Right and left handrail frames 86 are positioned laterally outward relative to the right portion of the right step 44 and laterally outward relative to the left portion of the left step 45 and extend upward. .

(Arrangement of right step, left step, rear step, and side step)
As shown in FIGS. 3, 11 and 12, the right step 44 and the left step 45 are arranged side by side in the left-right direction so as to be in contact with each other, and the rear portions of the right floor 40 and the left floor 41 (the above-described (overall configuration of the floor)). ) and FIG. 2).

The upper surface portion 44a of the right step 44 and the upper surface portion 45a of the left step 45 are arranged at the same height. The upper end of the wall 44i of the right step 44 and the upper ends of the walls 45h and 45i of the left step 45 are arranged at the same height.

The fuel tank 80 is covered by the right step 44, and the right front portion of the fuel tank 80 enters the projecting portion 44q of the right step 44, and the fuel filler port 80a of the fuel tank 80 enters the opening 44r of the right step 44. protrude upwards.

The driver's seat 60 is arranged in the cutouts 44g and 45g of the right step 44 and left step 45, and arranged in the left-right central part of the front part of the step 43 (right step 44 and left step 45).

As shown in FIG. 3, the right and left rear steps 46 are arranged side by side in the left-right direction so as to be in contact with each other. It is provided so as to be continuous with. The right and left rear steps 47 are arranged side by side in the left-right direction so as to be in contact with each other, and are provided so as to be connected to the rear portion of the rear step 46 .

The upper surfaces of the rear step 46 and the rear step 47 ( body portions 46a, 47a) are arranged at the same height as the upper ends of the wall portions 44h, 45h, 44i, 45i of the right step 44 and left step 45.

As shown in FIGS. 3 and 4, the right lateral step 48 is provided so as to be continuous with the lateral portion (wall portion 44h) of the right step 44 and the lateral portion (wall portion 45h) of the right rear steps 46 and 47. , the left lateral step 48 is provided so as to continue to the lateral portion of the left step 45 and the lateral portions of the left rear steps 46 and 47 .

The upper surface of the lateral step 48 is arranged at the same height as the upper surfaces of the rear steps 46, 47 ( body portions 46a, 47a) and the upper ends of the walls 44h, 45h, 44i, 45i of the right step 44 and left step 45. be done. The upper end portion of the wall portion 48d of the lateral step 48 and the upper end portion of the wall portion 47i of the rear step 47 are arranged at the same height.

(Structure of seat)
As shown in FIGS. 3, 4, 14 and 15, a seat 87 is provided.
The seat portion 87 is formed by bending a pipe material, and includes a bar-shaped lateral portion 87a extending in the left-right direction, a bar-shaped right leg portion 87b extending downward from the right portion of the lateral portion 87a, and a lateral portion 87a. A rod-shaped left leg portion 87c extending downward from the left portion of the portion 87a, an angle-shaped mounting bracket 87d connected to the lower ends of the right leg portion 87b and the left leg portion 87c, and an angle-shaped mounting bracket 87d connected to the mounting bracket 87d. and a boss portion 87e.

As shown in FIGS. 4 and 14, the seat portion 87 is positioned so that the lower portion of the right leg portion 87b of the seat portion 87 is located closer to the center of the step 43 than the right portion of the lateral portion 87a of the seat portion 87 is. The right leg 87b is bent.

The left leg portion 87c of the seat portion 87 is bent so that the lower portion of the left leg portion 87c of the seat portion 87 is positioned closer to the left and right center of the step 43 than the left portion of the lateral portion 87a of the seat portion 87 is. As a result, the width W1 of the lateral portion 87a of the seat 87 is larger than the width W2 of the lower portions of the right leg 87b and the left leg 87c of the seat 87. As shown in FIG.

(Structure of support for seat)
As shown in FIGS. 3, 14, and 15, the right and left mounting brackets are attached to the lateral frame 71 of the front step frame 67 (see above (Configuration of front step frame supporting right and left steps) and FIG. 6). A bracket 71b is attached, and the attachment bracket 71b is positioned below the openings 44e and 45e of the right step 44 and left step 45. As shown in FIG.

A right mounting bracket 87 d (lower portion of the right leg portion 87 b ) of the seat portion 87 is placed on the crosspiece 44 f of the right step 44 , and a right boss portion 87 e of the seat portion 87 is mounted on the opening of the right step 44 . 44e and mounted on the right mounting bracket 71b of the lateral frame 71 (front step frame 67).

The left mounting bracket 87 d (lower part of the left leg 87 c ) of the seat 87 is mounted on the crosspiece 45 f of the left step 45 , and the left boss 87 e of the seat 87 is mounted on the opening of the left step 45 . 45e and mounted on the left mounting bracket 71b of the lateral frame 71 (front step frame 67).

A bolt 88 is inserted into the boss portion 87e of the seat portion 87 and attached to the mounting bracket 71b of the lateral frame 71 (front step frame 67).
As a result, the bolt 88 is arranged along the vertical direction between the adjacent crosspieces 44f and 45f in the openings 44e and 45e of the right step 44 and left step 45, and the mounting bracket 87d (right leg 87b and the lower part of the left leg 87c) and the mounting bracket 71b of the lateral frame 71 (front step frame 67).

By tightening the bolt 88, the crosspieces 44f and 45f of the right step 44 and the left step 45 are sandwiched between the mounting bracket 87d of the seat portion 87 and the mounting bracket 71b of the lateral frame 71 (front step frame 67). Then, the right leg 87b and left leg 87c of the seat 87 are attached to the step 43 (right step 44 and left step 45).

(Arrangement of the seat)
As shown in FIGS. 1 to 4, in side view and plan view, the seat portion 87 is positioned behind the driver's seat 60 and between the driver's seat 60 and the rear end of the step 43 (rear step 47). , the step 43 (the right step 44 and the left step 45) are provided along the horizontal direction.

In plan view and rear view, the right end of the seat portion 87 (lateral portion 87a) is positioned closer to the center of the step 43 than the right end of the step 43 (right lateral step 48), and the right end of the right step 44 It is located on the left-right center side of the step 43 from (the wall portion 44h).

In plan view and rear view, the left end of the seat portion 87 (lateral portion 87a) is positioned closer to the center of the step 43 than the left end of the step 43 (left horizontal step 48), and the left end of the left step 45. It is located on the left-right center side of the step 43 from (the wall portion 45h).

When viewed from the rear, the lower portion (mounting bracket 87d) of the right leg portion 87b of the seat portion 87 is positioned at the step 43 (right step 44) at a portion on the left-right center side of the step 43 from the right portion of the lateral portion 87a of the seat portion 87. can be attached to

When viewed from the back, the lower portion (mounting bracket 87d) of the left leg portion 87c of the seat portion 87 is positioned at the step 43 (left step 45) at the left-right center side of the step 43 from the left portion of the lateral portion 87a of the seat portion 87. can be attached to

In the rear view, the width W1 of the lateral portion 87a of the seat 87 and the width W2 of the lower portions of the right leg 87b and the left leg 87c of the seat 87 are larger than the width W3 of the driver's seat. . A right portion and a right leg portion 87b of the lateral portion 87a of the seat portion 87 are positioned laterally outward on the right side of the driver’s seat 60, and a left portion and a left leg portion 87c of the lateral portion 87a of the seat portion 87 are located on the driver’s seat. It is located laterally to the left of 60.

(Configuration of upper frame and lower frame provided around step)
As shown in FIGS. 1-4, a lower frame 89 is mounted across the lower rear portion of the right and left handrail frames 86 . The lower frame 89 is constructed by bending a pipe member, and is a mounting bracket 89d which is a height adjusting portion connected to the ends of the lateral portion 89a, the right portion 89b and the left portion 89c, the right portion 89b and the left portion 89c. have.

A lateral portion 89a of the lower frame 89 is provided in the vicinity of the upper portion of the rear portion of the step 43 (the wall portion 47i of the rear step 47) along the left-right direction. A right portion 89b and a left portion 89c of the lower frame 89 are provided above and near the right and left lateral portions (lateral steps 48) of the step 43 along the front-rear direction. Mounting brackets 89d of the lower frame 89 are attached to the lower rear portions of the right and left handrail frames 86 by bolts.

An upper frame 90 is attached over the rear upper portion of the right and left handrail frames 86 . The upper frame 90 is constructed by bending a pipe member, and is a mounting bracket 90d which is a height adjusting portion connected to the ends of the lateral portion 90a, the right portion 90b and the left portion 90c, the right portion 90b and the left portion 90c. have.

The lateral portion 90a of the upper frame 90 is provided along the horizontal direction along the lateral portion 89a of the lower frame 89 at a position spaced upward from the lateral portion 89a of the lower frame 89 by a predetermined distance.

The right portion 90b and the left portion 90c of the upper frame 90 are arranged along the right portion 89b and the left portion 89c of the lower frame 89 at a predetermined distance above the right portion 89b and the left portion 89c of the lower frame 89. It is provided along the front-rear direction.

The mounting brackets 90d of the upper frame 90 are attached to the upper rear portions of the right and left handrail frames 86 with bolts. A plurality of frames 91 are connected across the upper frame 90 and the lower frame 89 .

In a side view and a plan view, the portion above the rear portion of the step 43 (lateral portion 90a) in the upper frame 90 is arranged on the rear side of the portion above the rear portion of the step 43 in the lower frame 89 (lateral portion 89a). ing.

The right and left handrail frames 86 are provided on the front side of the upper frame 90 and lower frame 89 at the right and left ends of the step 43 (right and left lateral steps 48). The upper frame 90 is provided at a position lower than the upper end of the handrail frame 86 .

A plurality of bolt mounting openings (not shown) are formed in the handrail frame 86 along the vertical direction. By vertically changing the mounting positions of the mounting brackets 90d and 89d of the upper frame 90 and the lower frame 89 by using the opening of the handrail frame 86, the mounting position of the handrail frame 86 on the upper frame 90 and the lower frame 89 can be changed vertically. can be changed to

(bonnet configuration)
As shown in FIGS. 23 and 24, the bonnet 58 has right and left lights 92, a grid-shaped front grille 93, and a center mascot 94 (see FIGS. 1 and 2) at the front of the hood 58. is provided. A right side panel 95 is provided on the right side of the bonnet 58 , and a left side panel 96 is provided on the left side of the bonnet 58 .

The right and left side panels 95 and 96 are composed of frame portions 95a and 96a forming an outer peripheral portion, and frame portions 95b and 96b connected along the front-rear direction across the front and rear portions of the frame portions 95a and 96a. Grid-shaped frame portions 95c and 96c are provided between the frame portions 95a and 96a and the frame portions 95b and 96b.

Between the frame portions 95c of the right side panel 95, an elongated hexagonal right opening 95d is formed along the front-rear direction. Between the frame portions 96c of the left side panel 96, a plurality of elongated hexagonal left openings 96d are formed along the front-rear direction.

(Configuration of right and left side panel openings)
As shown in FIGS. 25 and 26, the frame portion 95c (opening portion 95d) of the right side panel 95 has a predetermined horizontal width along the horizontal direction. has a rectangular cross section.

The outer edge 95e and the inner edge 95f of the opening 95d of the right side panel 95 have the same elongated hexagonal shape. The area is the air passage cross-sectional area of the opening 95 d of the right side panel 95 .

The frame portion 96c (opening portion 96d) of the left side panel 96 has a predetermined lateral width along the horizontal direction, and the cross-sectional shape of the frame portion 96c of the left side panel 96 is V-shaped. ing.

The front-to-rear width WL11 of the outer edge 96e of the left side panel 96 is larger than the front-to-rear width WL12 of the inner edge 96f of the left side panel 96. The vertical width WL21 of the outer edge 96e of the left side panel 96 is larger than the vertical width WL22 of the inner edge 96f of the left side panel 96. As shown in FIG.

The opening 96d of the left side panel 96 is wider than the front-to-rear width WL12 and the vertical width WL22 of the inner portion of the bonnet 58 at the opening 96d of the left side panel 96. 58 is formed in an outwardly widening shape in a cross-sectional view so that the front-rear width WL11 and the vertical width WL21 of the portion on the outer side of 58 are large.

This causes the elongated hexagonal shape of the outer edge 96e of the left side panel 96 opening 96d to be larger than the elongated hexagonal shape of the inner edge 96f of the left side panel 96 opening 96d. there is

As a result, in the opening 96d of the left side panel 96, the air passing cross-sectional area of the portion inside the bonnet 58 in the opening 96d of the left side panel 96 and the bonnet in the opening 96d of the left side panel 96 The air passage cross-sectional area of the portion on the outside of 58 is set to be different.

As shown in FIGS. 25 and 26, in the openings 95d and 96d of the right and left side panels 95 and 96, the front-rear width WR1 of the edges 95e and 95f of the right side panel 95 and the width of the left side panel 96 The front-to-rear width WL11 of the outer edge portion 96e is the same. The vertical width WR2 of the edges 95e and 95f of the right side panel 95 and the vertical width WL21 of the outer edge 96e of the left side panel 96 are the same.

The front-to-rear width WR1 of the edges 95e and 95f of the right side panel 95 is larger than the front-to-rear width WL12 of the inner edge 96f of the left side panel 96. The vertical width WR2 of the edges 95e and 95f of the right side panel 95 is larger than the vertical width WL22 of the inner edge 96f of the left side panel 96. As shown in FIG.

The elongated hexagonal area of the edges 95e and 95f of the right side panel 95 (air passage cross-sectional area of the opening 95d of the right side panel 95) and the elongated hexagon of the outer edge 96e of the left side panel 96 The area of the shape (cross-sectional area of air passage of the portion of the opening 96d of the left side panel 96 on the outside of the bonnet 58) is the same.

The elongated hexagonal area of the edges 95e and 95f of the right side panel 95 (air passage cross-sectional area of the opening 95d of the right side panel 95) corresponds to the elongated hexagonal area of the inner edge 96f of the left side panel 96. It is larger than the area of the shape (cross-sectional area of passage of air in the portion on the inside of the bonnet 58 in the opening 96d of the left side panel 96).
As a result, the air passage cross-sectional area of the opening 95d of the right side panel 95 is set to be larger than the air passage cross-sectional area of the opening 96d of the left side panel 96, which is smaller.

In this case, the opening 96d of the left side panel 96 becomes one of the right opening 95d and the left opening 96d, and the opening 95d of the right side panel 95 becomes the right opening. It becomes the other opening 95d of 95d and the left opening 96d.

(Construction near the left part of the engine)
As shown in FIGS. 27 and 28, inside the bonnet 58, the engine 49 is laterally supported by the support frame 42 (see the above-mentioned (overall configuration of riding-type rice transplanter) and FIG. 5). An output shaft 49 a of the engine 49 protrudes leftward from a left portion of the engine 49 , and an output pulley 78 and a flywheel 97 are attached to the output shaft 49 a of the engine 49 .

As a result, in plan view, the output shaft 49a of the engine 49, the output pulley 78, and the flywheel 97 face the left side panel 96 of the bonnet 58, and are provided in a portion of the engine 49 facing one opening 96d. ing.

A hydrostatic continuously variable transmission 98 is connected to the left side surface of the mission case 25 , and a transmission belt 99 is attached across the output pulley 78 and the input pulley 98 a of the continuously variable transmission 98 .

A support stay 103 connected to the left front portion of the engine 49 extends leftward and below the right floor frame 50 (see the above-mentioned (floor frame structure for supporting the floor) and FIG. 5). I'm in. A support stay 104 connected to the left rear portion of the engine 49 extends leftward and passes under the right floor frame 50 while straddling over the transmission belt 99 .

A muffler 105 is arranged in the longitudinal direction below the right floor frame 50 , the front part of the muffler 105 is supported by the support stay 103 , and the rear part of the muffler 105 is supported by the support stay 104 . An exhaust pipe 106 extending from the front of the engine 49 is connected to the front of the muffler 105 .

The power of the engine 49 is transmitted to the continuously variable transmission 98 via the output shaft 49a of the engine 49, the output pulley 78, and the transmission belt 99, and the power of the continuously variable transmission 98 is transferred to the auxiliary transmission inside the transmission case 25. (not shown).

The power of the auxiliary transmission is transmitted to the front wheels 1 via a transmission system (not shown) inside the front axle case 26 (see the above-mentioned (front and rear wheel support structure) and FIG. 5), A transmission shaft (not shown) from the transmission case 25 to the rear axle case 27 (see the above-mentioned (front and rear wheel support structure) and FIG. 7), and a transmission system inside the rear axle case 27 (not shown). ) to the rear wheels 2.
The power branched from between the continuously variable transmission 98 and the sub-transmission is transmitted from the transmission case 25 to the seedling planting device 5 (see the above-mentioned (configuration of seedling planting device and spare seedling rest) and FIGS. 1 and 2). ) to the seedling planting device 5 via a transmission shaft (not shown).

(Construction near the right side of the engine)
As shown in FIG. 28 , inside the bonnet 58 , a fan 100 that is rotationally driven by the power of the engine 49 is provided on the right side of the engine 49 . A radiator 101 is arranged along the front-rear direction and is supported on the right side of a support frame 42 (see the above-mentioned (overall configuration of riding-type rice transplanter) and FIG. 5). , is attached to the right side of the radiator 101 .

Thus, in plan view, the fan 100 and the radiator 101 are provided between the engine 49 and the right side panel 95 (the other opening 95 d of the hood 58 ) of the hood 58 inside the hood 58 .
In plan view, the fan 100 is provided between the radiator 101 and the engine 49, and the net member 102 is provided in a portion of the radiator 101 facing the other opening 95d of the bonnet 58. As shown in FIG.

When the fan 100 is rotationally driven, an air flow is generated in the bonnet 58 along the horizontal direction from right to left. It is introduced into the interior of the bonnet 58 through an opening 95d in the right side panel 95 of the bonnet 58 (see above (Right and Left Side Panel Opening Configurations) and FIGS. 23 and 25).
In this case, the opening 95d of the right side panel 95 becomes one of the right opening 95d and the left opening 96d, and the opening 96d of the left side panel 96 becomes the right opening. It becomes the other opening 96d of the opening 95d and the left opening 96d.

The air introduced into the hood 58 from the opening 95d of the right side panel 95 of the hood 58 passes through the net member 102, the radiator 101, and the fan 100, flows around the engine 49, and flows to the left side of the hood 58. The exterior of the bonnet 58 is exited through an opening 96d in the panel 96 (see above (Right and Left Side Panel Opening Configurations) and FIGS. 24 and 25).

(First alternative embodiment of the invention)
1 to 28 show a ride-on type rice transplanter that is not equipped with a fertilizing device 107. FIG. In the riding-type rice transplanter shown in FIGS. 1 to 28, a case of obtaining a riding-type rice transplanter equipped with a fertilizing device 107, which is an agricultural material supply device, will be described below.

(Installation area for installing a fertilizing device in the first alternative embodiment of the invention)
3, 4 and 6, the seat portion 87, rear steps 46, 47 and rear step frame 68 are removed. The walls 44i, 45i of the right step 44 and left step 45 shown in FIGS. 11 and 12 are cut away and the right step 44 and left step 45 are used.

In FIGS. 3 and 6, since the rear steps 46, 47 and the rear step frame 68 are not provided, the area where the rear steps 46, 47 and the rear step frame 68 were provided becomes an installation area for providing the fertilizing device 107. An installation area for installing the fertilizing device 107 is formed on the rear side of the right step 44 and left step 45 and the front step frame 67 and between the rears of the right and left lateral steps 48. It is formed.

(Structure of fertilizing device in the first alternative embodiment of the invention)
As shown in FIGS. 29 to 32, the fertilizing device 107 has a hopper 108, a plurality of feeding units 109, an air blowing unit 110, a conveying air duct 111, a discharge duct 112, and the like.

As shown in FIG. 30, a support frame 114 is provided along the left-right direction, and right and left support frames 113 are connected to the support frame 114 and extend downward. The lower portion of the support frame 113 is bolted to the rear portion of the lateral frame 18 (see (construction of the body frame) described above and FIG. 6).

As shown in FIGS. 29, 30, and 31, right and left support frames 115 are connected to the lower rear portion of the handrail frame 86, and lateral support frames 116 are connected to the right and left support frames. 115 are connected. The feeding portion 109 is connected to the support frames 114 and 116 so as to be sandwiched from the front and rear by the support frames 114 and 116 .

A hopper 108 that stores fertilizer, which is an agricultural material, is attached over the top of a plurality of delivery parts 109 , and the delivery part 109 is connected to the lower part of the hopper 108 . A ditch making device (not shown) is attached to the float 9 (see the above-mentioned (structure of the seedling planting device and the preliminary seedling resting table) and FIGS. 1 and 2), and the delivery portion 109 and the ditch making device are attached. A hose (not shown) is connected across.

A blower 110 is attached to the left side of the support frame 114 . The blower unit 110 is
A blower case 110a attached to the left part of the support frame 114, a blower blade (not shown) housed in the blower case 110a so as to be rotatable around an axis extending in the vertical direction, and an electric motor for rotating the blower blade. and a motor 110b.

As shown in FIGS. 29, 30, and 32, a cylindrical carrier air duct 111 is arranged along the left-right direction and is connected along the left-right direction across the lower front portions of the plurality of feeding portions 109. . A blower switching section 119 is connected to the left portion of the carrier air duct 111 , and a blower case 110 a of the blower section 110 is connected to the blower switching section 119 .

A cylindrical exhaust duct 112 is arranged in the left-right direction on the front side of the carrier-air duct 111 and at the same height as the carrier-air duct 111 , and extends in the left-right direction across the front portions of the plurality of feed-out portions 109 . The left part of the exhaust duct 112 is connected to the air switching part 119 . A cover 120 for protecting the conveying air duct 111 and the discharge duct 112 is provided above the discharge duct 112 over substantially the entire length of the discharge duct 112 along the left-right direction.

(Structure of suction duct in first alternative embodiment of the invention)
As shown in FIGS. 29, 39, and 31, the intake duct 117 extends downward from the lower portion of the blower case 110a of the blower portion 110, and the lower side of the upper surface portion 45a of the left step 45 is connected to the engine. 49 and extends forward.

A support stay 118 is attached to the frame 73 of the front step frame 67 (see the aforementioned (configuration of the front step frame supporting the right step and the left step) and FIG. 6). A suction duct 117 is supported by a support stay 118 and arranged below the lower portion 86 b of the left handrail frame 86 .

(Operation state of the fertilizing device in the first alternative embodiment of the invention)
As shown in FIGS. 29 to 32, when the electric motor 110b rotates the blower vane in the blower section 110, relatively high-temperature air near the engine 49 is sucked into the intake duct 117, and the intake duct 117 rotates. is guided to the blower unit 110 via the

The blower section 110 generates carrier air from the air guided by the air blower 110 , and supplies the carrier air from the air switching section 119 to the carrier air duct 111 . supplied to

The manure discharge port (not shown) from the feeding portion 109 to the discharge duct 112 is closed, and the air blow switching portion 119 is set to a state in which the air from the air blowing portion 110 is supplied to the air duct 111 .

In the above-described state, the fertilizer in the hopper 108 is fed into the feeding portion 09 by the feeding portion 109, and the fertilizer inside the feeding portion 09 is pushed through the hose by the conveying air supplied from the conveying air duct 111 to the feeding portion 109. It is fed through to the grooving machine (see above (Construction of Fertilizer Applicator in First Alternative Embodiment of the Invention)). As the riding-type rice transplanter advances, grooves are formed in the paddy field by the grooving machine, and the fertilizer supplied to the grooving machine is supplied to the grooves in the paddy field.

When the manure remaining in the hopper 108 is to be collected after the work is finished, the manure discharge port (not shown) from the feeding unit 109 to the discharge duct 112 is opened, and the air blow switching unit 119 is switched to the conveying air of the air blow unit 110. is supplied to the discharge duct 112 .
In the above-described state, the fertilizer remaining in the hopper 108 is supplied to the discharge duct 112, and is conveyed to the right outlet of the discharge duct 112 by the conveying wind supplied to the discharge duct 112. Collect the manure coming out of the container into a collection bag (not shown).

(Arrangement state of the fertilizing device in the first alternative embodiment of the invention)
As shown in FIGS. 29 to 32, the fertilizing device 107 (hopper 108, feeding unit 109, air blowing unit 110, conveying air duct 111, discharge duct 112, and air switching unit 119) has an installation area for installing the fertilizing device 107. (Refer to the above-mentioned (installation area for providing the fertilizing device in the first alternative embodiment of the invention)).
The fertilizing device 107 is arranged along the horizontal direction on the rear side with respect to the rear portion of the step 43 (the right step 44 and the left step 45) in plan view and side view.

The fertilizing device 107 is arranged between the rear portion of the right lateral step 48 and the rear portion of the left lateral step 48 in plan view and rear view.
The rear portion of the right lateral step 48, which is the right portion of the step 43, extends rearward so as to be positioned laterally outward with respect to the right portion of the fertilizing device 107. As shown in FIG.
The rear portion of the left lateral step 48, which is the left portion of the step 43, extends rearward so as to be positioned laterally outward with respect to the left portion of the fertilizing device 107. As shown in FIG.

The upper surfaces 44a and 45a of the right step 44 and left step 45, the discharge duct 112, the conveying air duct 111, the blower case 110a of the blower section 110, and the blower switching section 119 are arranged at the same height.

As viewed from the front, the upper surface portions 44a and 45a of the right step 44 and left step 45, the discharge duct 112, and the conveying air duct 111 overlap over the entire length of the conveying air duct 111 and the entire length of the discharge duct 112. . As viewed from the front, the upper surface portion 45a of the left step 45, the blower case 110a of the blower portion 110, and the blower switching portion 119 overlap.

As a result, the fertilizing device 107 is provided at a relatively low position in the riding-type rice transplanter. In a working state (a state in which the front wheels 1 and the rear wheels 2 are in contact with the plowing board and the float 9 of the seedling planting device 5 is in contact with the paddy field), it is obliquely upward from the seedling placement table 10 along the seedling placement table 10 in a side view. Assuming an imaginary line (not shown) extending forward, the upper end of the fertilizing device 107 (hopper 108) is positioned below the imaginary line.

Instead of the fertilizing device 107, a hopper (not shown) for storing chemicals, which are agricultural materials, a plurality of delivery units (not shown), an air blower (not shown), a conveying air duct (not shown), and a discharge A chemical supply device having a duct (not shown) or the like and configured to supply a chemical to the paddy field may be provided as the agricultural material supply device.

(Second alternative embodiment of the invention)
In the fertilizing device 107, the blower unit 110 and the blower switching unit 119 are configured to be connected to the right portions of the conveying wind duct 111 and the discharge duct 112, and the intake duct 117 is connected to the lower part of the blower case 110a of the blower unit 110. , may extend downward, and the lower side of the upper surface portion 44 a of the right step 44 may extend forward toward the engine 49 .
The intake duct 117 may be arranged above the lower portion 86 b of the right (left) handrail frame 86 .

(Third alternative embodiment of the invention)
Instead of the five-link suspension mechanism, a three-link suspension mechanism having right and left links and lateral rods may be employed.

(Fourth alternative embodiment of the invention)
In the fuel tank 80, the front lower portion of the fuel tank 80 is attached to the lateral frame 51 of the left floor frame 50, and the rear upper portion of the fuel tank 80 is attached to the left portion of the lateral frame 72 of the front step frame 67. Alternatively, the fuel tank 80 may be provided below the left front portion of the step frame 66 (the front step frame 67).
In this configuration, the left outermost connecting frame 79 may be arranged along the vertical direction at the left laterally outer position with respect to the fuel tank 80 .

(Fifth alternative embodiment of the invention)
Instead of configuring the right step 44 and the left step 45 separately, the right step 44 and the left step 45 may be configured integrally as one front step.
Instead of configuring the right and left floor frames 50 separately, the right and left floor frames 50 may be connected to form one floor frame 50 .

(Sixth alternative embodiment of the invention)
Separately from the openings 44e and 45e of the right step 44 and the left step 45, the right step 44 and the left step 45 may be provided with dedicated openings for mounting the seat portion 87 thereon.
According to this configuration, the boss portion 87e of the seat portion 87 becomes unnecessary, so that the right step 44 and the left step 45 are sandwiched between the mounting bracket 87d of the seat portion 87 and the mounting bracket 71b of the lateral frame 71. , the bolt 88 can be tightened through the openings of the right step 44 and the left step 45 across the mounting bracket 87 d of the seat portion 87 and the mounting bracket 71 b of the horizontal frame 71 .

(Seventh alternative embodiment of the invention)
In the left side panel 96, the elongated hexagonal shape of the inner edge 96f of the left side panel 96 opening 96d is greater than the elongated hexagonal shape of the outer edge 96e of the left side panel 96 opening 96d. It may be configured to be a thing.

As a result, in the opening 96d of the left side panel 96, the air passing cross-sectional area of the portion inside the bonnet 58 in the opening 96d of the left side panel 96 and the bonnet in the opening 96d of the left side panel 96 The air passage cross-sectional area of the portion on the outside of 58 is set to be different.

(Eighth alternative embodiment of the invention)
The engine 49 is arranged with the left and right reversed, the output shaft 49a of the engine 49 is provided on the right side of the engine 49, and the fan 100, the radiator 101 and the net member 102 are arranged on the left side of the engine 49. may
According to this configuration, in the bonnet 58, the opening 95d of the right side panel 95 may be configured as shown in the right part of FIG. 5 and the lower part of FIG. ) may be configured as described in The opening 96d of the left side panel 96 may be constructed as shown in the left part of FIG. 5 and the upper part of FIG.

(Ninth alternative embodiment of the invention)
The engine 49 may be configured to be air-cooled. According to this configuration, a fan 100 for air cooling of the engine 49 is provided, and the radiator 101 is eliminated.
The openings 95d, 86d of the right and left side panels 95, 96 may be formed not only in an elongated hexagonal shape, but also in a circular shape, a rectangular shape, an elongated elliptical shape, a parallelogram shape, or the like.

(Tenth alternative embodiment of the invention)
In a riding-type rice transplanter equipped with a fertilizing device 107, the seat portion 87 may be provided as a guard member for the fertilizing device 107, the right and left side steps 48 may be eliminated, and the upper frame 90 and the lower frame 90 may be omitted. Frame 89 may be eliminated.

(Eleventh alternative embodiment of the invention)
A motorized winch (not shown) may be provided as described below.
A winch frame (not shown) is attached to the front part of the support frame 42 (see the above-mentioned (overall configuration of the riding-type rice transplanter) and FIG. 5), and the front position of the floor 38 extends upward. , the winch is mounted on the top of the winch frame so that it is positioned higher than the floor 38.

When the ride-on rice transplanter becomes unable to run in a deep paddy field, a wire (not shown) extended from the winch is attached to a tree or the like on a ridge, and the wire is wound by the winch to escape the ride-on rice transplanter. . Since the winch is arranged at a position higher than the floor 38, the winch will not be submerged.

Of the plurality of mounting members that mount the winch frame to the support frame 42, one mounting member may be configured to be slightly weaker than the other mounting members.
When a large load is applied to the winch when using the winch, the fragile mounting member can be damaged and the winch frame can be dropped from the support frame 42, avoiding a state in which a large load is applied to the support frame 42. be able to.

The present invention can be applied not only to riding-type rice transplanters, but also to riding-type direct seeders equipped with a seeding device for sowing seeds on the surface of a field as a working device.

2 rear wheels 3 body frame (body)
4 link mechanism 5 seedling planting device (working device)
38 floor 43 step 44e opening 44f crosspiece 45e opening 45f crosspiece 60 driver's seat 66 step frame 86 handrail frame 87 seat 87a side portion 87b right leg 87c left leg 88 bolt 89 lower frame 89d mounting bracket (high adjustment part)
90 Upper frame 90d Mounting bracket (height adjustment part)
W1 Width W3 Width

Claims (10)

1. a link mechanism extending rearward from the rear of the fuselage;
   a working device supported by the link mechanism;
   a floor provided on the fuselage;
   a step provided at a rear portion of the fuselage and provided at a position higher than the floor;
   A driver's seat arranged in front of the step,
   The paddy field work machine is provided with a seat portion provided on the step so as to be positioned behind the driver's seat and between the driver's seat and a rear end portion of the step.
2. The paddy field working machine according to claim 1, wherein the seat has a width larger than that of the driver's seat and extends in the left-right direction.
3. the right end of the seat portion is positioned closer to the left-right center of the step than the right end of the step;
   3. The paddy field working machine according to claim 2, wherein the left end portion of said seat portion is positioned closer to the left-right center side of said step than the left end portion of said step.
4. The seat part
   A bar-shaped horizontal portion along the left-right direction;
   a rod-shaped right leg extending downward from the right portion of the lateral portion and attached to the step;
   4. The paddy field working machine according to claim 2, further comprising a rod-like left leg portion extending downward from the left portion of said lateral portion and attached to said step.
5. A step frame that supports the step from below is provided,
   The lower part of the right leg is attached to the step by attaching the lower part of the right leg to the step frame so that the step is sandwiched between the lower part of the right leg and the step frame. ,
   The lower part of the left leg is attached to the step by attaching the lower part of the left leg to the step frame so that the step is sandwiched between the lower part of the left leg and the step frame. The paddy field work machine according to claim 4.
6. An opening for an operator to see the rear wheels for running under the step, and a plurality of crosspieces provided in the opening so as to be arranged side by side with intervals in the lateral direction are provided in the step. provided in
   A bolt is arranged along the vertical direction between the adjacent crosspieces in the opening, and is attached across the lower part of the right leg part, the lower part of the left leg part, and the step frame,
   6. The paddy field working machine according to claim 5, wherein the crosspiece is sandwiched between the lower portion of the right leg portion and the lower portion of the left leg portion and the step frame by tightening the bolt.
7. A lower frame provided in the vicinity of the upper portion of the rear portion of the step along the left-right direction, and provided in the vicinity of the upper portion of the right and left lateral portions of the step along the front-rear direction. The paddy field work machine according to any one of 1 to 6.
8. The paddy field working machine according to claim 7, wherein an upper frame is provided along the horizontal direction and the front-rear direction so as to follow the lower frame at a position spaced upward from the lower frame by a predetermined distance.
9. The paddy field working machine according to claim 8, wherein the upper portion of the rear portion of the step in the upper frame is arranged on the rear side of the upper portion of the rear portion of the step in the lower frame.
10. right and left handrail frames provided laterally outward relative to the right and left portions of the steps and forward relative to the upper and lower frames;
    the upper frame and the lower frame are attached to the handrail frame;
    10. The paddy field work machine according to claim 8 or 9, further comprising a height adjusting portion capable of vertically changing the mounting position of the handrail frame in the upper frame and the lower frame.
    

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