JP2000324913A - Body structure of sulky rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a vehicle body frame which can commonly be used for sister machines having different wheel bases, respectively, in a low cost state not changing designs and the molds of sheet metal portions as much as possible. SOLUTION: This body structure of a sulky rice transplanter is provided with a pair of right and left main frames 38, 38 for connecting a transmission case 4 disposed in the front portion of the machine body to a rear wheel shaft case 27 disposed in the rear portion of the machine body. Metal plate-made vertical frames 60 having holes 77 at the rear end portions are arranged on the rear portions of the main frames 38 in a state standing thereon, and two holes 77, 80 are formed in each of the vertical frames 60 at a distance corresponding to a difference between wheel bases. The holes 77 are used for attaching the upper arms of lifting link mechanisms for liftably connecting to a planting section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body structure of a riding type rice transplanter, and more particularly, to a frame structure in which even a model having a slightly different wheelbase hardly increases the processing equipment cost of a body frame, or a structure under a floor. The present invention relates to a floor step structure that facilitates maintenance of deployed mechanical devices, or a rational frame configuration having a function of reinforcing a body frame and a function of attaching electric components.

[0002]

2. Description of the Related Art As shown in Japanese Patent Application Laid-Open No. 10-52127, a conventional body frame of a rice transplanter is composed of a pair of left and right main frames made of sheet metal formed by welding and integrating left and right press members. The main components such as the transmission case at the front of the fuselage and the rear axle case at the rear of the fuselage, the mounting part of the elevating link mechanism, and the support member of the driver's seat, etc. Since the connecting portion and the mounting portion can be integrally formed, the structure is rational in that the number of dedicated mounting members can be reduced as much as possible.

[0003]

For example, if the number of planting strips is one,
For sister models, such as models that differ in length or series models whose configuration dimensions partially differ based on the size of the engine, models that differ only in the wheelbase may be set. In this case, if the position of the transmission case at the front of the fuselage is used as a reference, the position of the mounting part of the rear axle case and the mounting part of the lifting link mechanism will move in the front-rear direction, and the position of the rear axle case will be changed. As a reference, since the position of the mounting portion of the transmission case moves back and forth, the main frame made of sheet metal becomes a separate one, and the press dies are reworked so that there is room for improvement in terms of cost disadvantage.

[0004] In addition, when a new design is partially or wholly made, such as a minor change or a model change, as described above, molds are interchangeable between related models, common parts can be used, and recycling is not possible. It has become necessary to more strongly promote the usual issues such as easy maintenance, easy maintenance, and further cost reduction from the viewpoint of manufacturing environmentally friendly products.

In view of the above-mentioned circumstances, the present invention seeks to use a common press die for a sheet metal member as much as possible, even if a plurality of models having slightly different wheelbases are simultaneously set, and to minimize the press die for the sheet metal member. It is an object of the present invention to obtain a body structure of a riding type rice transplanter that is more streamlined and simpler, such as minimizing a cost increase caused by a new work.

[0006]

According to a first aspect of the present invention, in a vehicle body structure of a riding type rice transplanter, a left and right pair of left and right axle cases connecting a transmission case disposed at a front portion of a vehicle body and a rear axle case disposed at a rear portion of the vehicle body are provided. With a main frame, a vertical frame made of sheet metal having a mounting portion of an elevating link mechanism at the rear end for connecting the planting portion so as to be able to move up and down is provided in a state of standing from each of the rear portions of each main frame, A plurality of the mounting portions are formed on the vertical frame at an interval in the front-rear direction.

In a second aspect of the present invention, in a body structure of a riding type rice transplanter, a vehicle is mounted on a vehicle body between front and rear of a driver's seat and a seedling mounting table.
The fertilizer applicator is placed side by side on the left and right, and between the top and bottom of the fertilizer applicator and the rear wheel in side view, a partition wall made of a plate material that integrally includes the left and right rear wheel fenders is placed on the left and right width of the fertilizer applicator It is characterized in that it is provided in a spanned state.

According to a third aspect of the present invention, in the second aspect, a fertilizer application frame for supporting the fertilizer application device on the vehicle body includes a main support frame erected from the vehicle body frame at a rear side of the partition wall so as to bypass the partition wall. It is characterized by comprising an auxiliary support frame that penetrates the partition wall in the vertical direction at the front side of the support frame.

According to a fourth aspect of the present invention, there is provided a body structure of a riding type rice transplanter, comprising a pair of left and right main frames connecting a transmission case arranged at a front part of a body and a rear axle case arranged at a rear part of the body. The vertical frame formed at the rear end of the elevating link mechanism for connecting the planting part so that it can be raised and lowered is fixed to the vertical frame formed at the rear end from the rear of the left and right main frames to form a body frame, A left and right front mounting part where the inside is fixed to the main frame in the vehicle body left and right direction, and a left and right facing rear mounting part where the inside is fixed to the vertical frame in the vehicle body left and right direction. And a front-back support portion for connecting the front and rear mounting portions to each other.

According to a fifth aspect of the present invention, in a body structure of a riding type rice transplanter, a pair of left and right main frames for connecting a transmission case arranged at a front part of a body and a rear axle case arranged at a rear part of the body are provided. The step supporting frame for supporting the floor steps of the section is composed of long left and right members fixed to these main frames in a state of traversing the left and right main frames, and auxiliary steps are arranged laterally outside the floor steps. The left and right supporting frame supporting the frame is bolted at the left and right intermediate parts to the outer end of the step supporting frame, and the body inside end of the auxiliary frame is step supported so that upward movement of this part is prevented. It is characterized in that it is brought into contact with the frame in the vertical direction.

According to a sixth aspect of the present invention, in a vehicle body structure of a riding type rice transplanter, a main frame is provided for connecting a transmission case with an HST disposed at a front portion of a vehicle body and a rear axle case disposed at a rear portion of the vehicle body. A basket-shaped floor frame that receives and supports the floor step of the driving unit is attached to the frame, the floor step is made of a plate material, and a flexible floor mat is laid on the floor step. A plurality of inspection holes for the HST and its related hydraulic equipment are formed in the floor step at an intermediate part in the left-right direction of the part, and the floor mat at a portion located in the plurality of inspection holes can be turned up freely. Characterized in that a slit is formed in the floor mat.

According to a seventh aspect of the present invention, in a body structure of a riding type rice transplanter, there is provided a pair of left and right main frames for connecting a transmission case disposed at a front part of the vehicle body and a rear axle case disposed at a rear part of the vehicle body. The mounting part of the lifting link mechanism for connecting the attachment part so as to be able to move up and down is attached to the rear end, and the supporting part of the driver's seat is formed from a sheet metal vertical frame formed at the front part from each rear part of each main frame. It is characterized in that it is provided in an upright state, a reinforcing plate for connecting the front portions of these left and right vertical frames is provided, and electrical components are mounted on the front surface of the reinforcing plate.

According to the first aspect of the present invention, since the main body frame and the vertical frame formed separately are integrated into the vehicle body frame, even if they are made of sheet metal members, the metal frames can be used. The mold is smaller than in the past, and it is easy to change and remodel the mold. The main frame is made of a long pipe material in front and back, and it is easy to change the length by changing the length of the wheel base. It is difficult to simply change the length of a vertical frame having various functions, such as support of a unit or an electrical component or an operation component.

Therefore, if the mounting portion of the lifting link mechanism, which is the most important component in terms of strength, is formed in advance in the vertical frame as a plurality of front and rear parts, the wheel base can be different by selecting and using the pivot portion. Therefore, there is no need to newly create a vertical frame and its mold. When using the front pivot portion of the plurality of pivot portions, if the rear pivot portion is in the way, it may be cut and used, and in that case, even if a cutting press type is used, a simple Since the cut type is inexpensive, the cost does not increase significantly.

According to the configuration of the second aspect, the following operation is provided. A so-called mid fertilizer application structure in which a fertilizer application device is disposed on a vehicle body after a driver's seat is conventionally known as Japanese Patent Application Laid-Open No. 10-3276.
As disclosed in Japanese Patent Publication No. 38-38, the fertilizer applicator, which is located just above the rear wheel in a side view, is disposed on the exposed rear end of the vehicle body frame. Therefore, when the fertilizer spills or leaks during the maintenance of the fertilizer replenishment or the feeding mechanism, there is a problem that the fertilizer easily falls on the mechanical devices at the rear of the vehicle body.

Therefore, in the configuration of the present invention, the partition wall made of a plate material is provided between the upper and lower sides of the fertilizer and the rear wheel in a side view so as to cover the left and right widths of the fertilizer, so that the leakage from the fertilizer may occur. Fertilizer that has fallen or spilled is caught by the partition wall and prevented from falling down to machinery and other equipment, so it can enter electrical components and cause electrical leakage, promote rust on the steel sheet, or rot. Inconveniences such as emission of an odor are eliminated, and collection and cleaning become easier. Further, since the partition wall integrally includes the left and right rear wheel fenders and is not a dedicated member, the state can be reduced in cost by sharing the members and functions.

According to the third aspect of the present invention, the fertilizer application frame for supporting the fertilizer application device is constituted by the front auxiliary support frame and the rear main support frame. Therefore, while preventing excessive stress in the front and rear direction from acting on each support frame,
Can support fertilizer application equipment firmly. And the rear main support frame, which is responsible for the main support function, is erected from the rear side to avoid interference with the partition wall, so there is no need to modify the partition wall such as notches to avoid the main support frame In addition, since the through-hole for vertically passing the auxiliary support frame can be relatively small, the mold for the fender-integrated partition wall does not have a special structure, and the appearance of the partition wall may be impaired. It will not be at all.

According to the fourth aspect of the present invention, the step frame for supporting the floor step has a frame structure in which the main frame and the vertical frame are connected to each other in an open U-shape facing inward. The left and right ends of the floor step, which are located far apart, can be firmly received and supported by the support, and the main frame, vertical frame, and step frame are interconnected with the other two members. It can also contribute to the construction of a strong body frame with excellent strength.

According to a fifth aspect of the present invention, the floor area is expanded to the left and right in order to facilitate the replenishment of seedlings at the end of the line by increasing the number of lines and to improve workability on the machine. The present invention relates to a mounting structure when an auxiliary step is provided. In other words, the auxiliary frame that supports the auxiliary step is bolted to the left and right ends of the auxiliary frame at the left and right ends of the step support frame. All you have to do is hit it against the step support frame.

According to the sixth aspect of the present invention, the floor step made of a plate material is mounted on the basket-shaped floor frame, so that the floor step can be formed at a low position and the floor step has flexibility. This is a means of improving the comfort of stepping and absorbing vibration by laying a floor mat in place. Since a plurality of inspection holes are formed in the floor step, maintenance of related hydraulic equipment such as the HST and the control valve can be performed without inconvenience of removing the floor step, and the inspection holes are usually covered with a floor mat. The appearance has been improved so that no objects fall from there. A slit is formed in the floor mat, and when necessary, the slit can be turned up to expose a plurality of inspection holes.

According to the seventh aspect of the present invention, the main frame and the vertical frame, which are separately prepared, are integrally formed to form the body frame. Smaller than the type change,
Modification and the like are facilitated. The reinforcement plate connecting the front parts of the left and right vertical frames is also used as a mounting member for electrical components to achieve multifunctionality, and since these electrical components are mounted on the front of the reinforcement plate, the external It is easier to perform inspections, etc.

[Effect] In the vehicle body structure of the riding type rice transplanter according to the first aspect, the vertical frame made of sheet metal is formed as a separate member from the main frame, and a plurality of pivoting portions for the lifting link mechanism are formed in the vertical frame in advance. As a result, it has become possible to make the body frames of different models having compatible wheelbases, such as sister models, more reasonable and can be configured with less cost.

In the vehicle body structure of the riding type rice transplanter according to the second and third aspects, the partition wall integrated with the rear wheel fender is disposed between the upper and lower sides of the fertilizer and the rear wheel to leak or spill. The fertilizer is prevented from falling on the mechanical devices at the rear of the machine body, and the harm caused by the fertilizer can be economically prevented.

In the vehicle body structure of the riding type rice transplanter according to the third aspect, the fertilizer is stably supported on the vehicle body at the rear side of the driver's seat while preventing a large modification of the partition wall and deterioration of the appearance thereof. A reasonable mid fertilization structure was obtained.

In the vehicle body structure of the riding type rice transplanter according to the fourth aspect, the step frame is formed to have a substantially inward open U shape in a state where the vertical frame and the front portion of the main frame are connected to each other, so that the body frame is formed. The floor steps can be stably supported with sufficient strength while effectively reinforcing them.

In the vehicle body structure of the riding type rice transplanter according to the fifth aspect, the auxiliary step is extended into the interior of the machine so that the auxiliary step can be stably supported at two places spaced apart on the left and right.
The bolt, which is the mounting means, makes it possible to adopt a rational and economical structure that can be used in only one place.

[0027] In the vehicle body structure of a riding type rice transplanter according to claim 6, a floor step is mounted on a basket-like frame.
By using the presence of floor mats to be laid in order to improve livability, it is easy to get on and off, and it is a low position that is easy to get on and off. A body structure capable of performing HST-related maintenance arranged under the floor has been realized.

In the vehicle body structure of the riding type rice transplanter according to the seventh aspect, the individual molds can be made smaller than before by using the vertical frame made of sheet metal as a separate member from the main frame, and the molds can be changed or modified. In addition, there is an advantage that the electric components can be attached with good maintenance by using a reinforcing plate for connecting the front portions of the vertical frames.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, an engine 3 and a transmission case 4 are provided at the front of a body provided with a pair of left and right front wheels 1 and a pair of right and left rear wheels 2 that can be steered.
The driving unit 5 is formed in the center of the fuselage, and the seedling planting device 7 is connected to the rear part of the fuselage via a link mechanism 6 so as to be able to move up and down freely to constitute a riding type rice transplanter. Seedling plant 7
Is constituted by six-row planting, three planting transmission cases 8, a rotating case 9 rotatably supported on both left and right sides of the planting transmission case 8, and a pair of It is composed of a planting claw 10, three ground floats 11, a seedling mounting table 16, and the like.

As shown in FIGS. 3 and 5, an HST 12 is integrally provided on the left lateral side of the horizontal axis type transmission case 4, and the HST 12 and the engine 3 are belt-driven. The shaft 13a of the pump 13 to which engine power is input
Is mounted on the right side surface of the transmission case 4, and the rotation of the shaft 15 a of the motor 15 is input to the transmission case 4.

As shown in FIG. 6, the motive power of the motor shaft 15a is supplied to the main clutch 17 and the two-stage traveling auxiliary transmission mechanism 18.
The power transmitted through the front wheel differential mechanism 19 and the output shaft 20 for traveling is transmitted to the left and right front wheel drive transmission shafts 19a, 19a. 2
Reference numeral 1 denotes a front wheel differential lock mechanism that can be freely turned on and off.

The driving shaft 18a of the traveling auxiliary transmission mechanism 18
In addition, a transmission gear 23 is provided via a one-way clutch 22 that transmits only rotation in the direction in which the aircraft advances, and from this transmission gear 23, as shown in FIG.
Gear type inter-stock transmission mechanism 24 and jump clutch 2
The power is transmitted to the output shaft 26 for planting via 5. HS
In T12 and the transmission case 4, the output shaft 20 for traveling and the output shaft 26 for planting are front-rear shafts, but the other shafts such as the drive shaft 18a are set to left-right horizontal shafts. In addition, the axis P of the traveling output shaft 20 and the axis Y of the planting output shaft 26 disposed thereon are arranged so as to coincide with the left and right center C of the vehicle body.

As shown in FIGS. 8 to 10, a rear axle case 27 supporting the rear wheels 2, 2 is provided with a rear axle 28, a gear type reduction mechanism 29 for the rear axle 28, and a left and right side provided with a side clutch / brake 30. Side case portions 31 and 31, and these left and right side case portions 31 and 31,
A center case 33 made of sheet metal for supporting the input shaft 32 is connected and integrated. The input shaft 32 and the traveling output shaft 20 of the transmission case 4 are linked to each other via a traveling transmission shaft a which is coupled to both of them.

As shown in FIGS. 10 and 11, the rear axle case 27 is supported by the body so as to freely roll left and right around the axis P of the input shaft 32 facing forward and backward. That is, the input shaft 3
A large-diameter pipe 34 that rotatably surrounds 2 is rotatably internally supported by a front support member 35 and a small-diameter pipe 36 fixed to the rear side of the center case portion 33 and rotatably internally supported. A rear support member 37 having a rod portion is provided on the body frame F.

A pair of left and right main frames 38, 38 constituting the body frame F and left and right spring receivers 33a, 33a fixed to the center case portion 33 are interposed via initially compressed winding springs 39, 39. I am wearing it. In other words, the rear axle case 27 and the winding springs 39 extending over the body are disposed on the left and right sides of the rolling fulcrum P, respectively.
Is provided with a rolling regulating mechanism 40 for urging the left and right wheels to return to the rolling neutral position. Normally, the left and right front wheels 1, 1 and the left and right rear wheels 2, 2 are horizontal to each other.

As shown in FIGS. 4, 10 and 13, the rear end of the planting transmission shaft b coupled to the planting output shaft 26 of the transmission case 4 and the PTO provided in the feed case 44. The input shaft 41 is linked and connected by a PTO interlocking shaft 42 and universal joints 43 at the front and rear ends of the PTO interlocking shaft 42, and the seedling planting device is centered on a rolling fulcrum shaft 46 disposed immediately above the PTO input shaft 41. 7 is rotatably supported by the lifting link mechanism 6.

That is, the rolling fulcrum shaft 46 protruding forward from the feed case 44 is rotatably supported on a pipe portion 45a at the lower end of a mast member 45 at the rear end of the lifting link mechanism 6, and the center of the rolling fulcrum shaft 46 is provided. X is aligned with the left and right center C of the vehicle body. Therefore, in the rolling neutral state of the seedling placement device 7, the axis Z of the PTO input shaft 41 also coincides with the vehicle center C in the left-right direction.

As described above, in the Honda planting machine, all of the traveling and planting transmission shafts a and b, the rolling shaft center P of the rear axle case 27, and the rolling shaft X of the seedling planting device 7 are all formed. In the right and left direction, the center of the vehicle is aligned with the right and left center C, so that the rolling of the PTO input shaft 41 due to the rolling of the seedling planting device 7 becomes extremely small, and the PTO interlocking shaft 42 has the front and rear ends. The bending angle of the universal joints 43, 43 is minimized.

Next, the vehicle body structure will be described. FIG.
As shown in FIG. 5 and FIGS. 14 to 17, the body frame F includes a pair of left and right main frames 38, 38 made of square pipes for connecting the transmission case 4 and the rear axle case 27.
It comprises a plurality of horizontal frame members 58 connecting them, a step frame 59 made of pipe, and a pair of left and right vertical frames 60, 60 made of sheet metal and fixed to the upper surface of the rear portion in a state of rising from the main frame 38. I have. Further, a pair of left and right reinforcing pipes 96, 96 for connecting the transmission case 4 and the rear axle case 27 is provided at a position separated downward from the main frame 38 to increase the frame strength.

At the rear end of the vertical frame 60, a mounting portion 77 for the upper arm 6A of the elevating link mechanism 6 is formed, and at a position slightly before (rear) the same as the mounting portion 77. Is formed. That is, the bifurcated front support portions 6a of the upper arm 6A and the support shaft 79 rotatably supporting the front end portion of the tension drive type single-acting hydraulic lifting / lowering cylinder 78 disposed therebetween are provided. Bosses 80, 80 fixed to both vertical frames 60, 60 are supported, and holes 77 for inserting the bosses 80 are formed at two positions before and after the vertical molding of the vertical frame member 60F alone (see FIG. 15). ). In order to improve the support strength of the boss 80, reinforcing plates 84 which are bent in a substantially U-shape in plan view are welded to the left and right inside the rear portion of the vertical frame 60.

A pair of front and rear holes 81a for attaching the fertilizer application frame 81 and a left and right sliding operation to select one of left and right markers (not shown) provided in the seedling planting device 7 are selected. The support hole 83a of the character fitting 83, the hole 85a for inserting the support shaft of the arm 85 for unlocking the marker, which is oscillated with the raising and lowering of the lifting link mechanism 6, the bolt hole 86 for attaching the stay, etc. It is formed in the place.

The two holes 77, 81a, and 83 at the front and rear are as described above.
Reference numerals a, 85a, and 86 are used to share a press-molding die for the vertical frame member 60F alone in the two models having slightly different wheelbases, except for the support hole 83a of the L-shaped bracket 83, except for the wheel holes 83a. Each hole 77, 81a,
85a and 86 are formed. For models having a long wheelbase, the press-formed vertical frame member 60F is used as it is. For models having a short wheelbase, the vertical frame member 60F is formed by cutting a vertical cut line Cu shown by a virtual line in FIGS. The vertical frame 60 is formed by using the material cut by pressing.

The lower arm 6B of the lifting link mechanism 6 is pivotally supported by a boss 38b penetratingly fixed to the rear end of the main frame 38 with a reinforcing stay 38a having a U-shaped upward facing rear view. In order to cope with the difference between the wheelbases described above, the length of the square pipe material forming the main frame 38 may be changed. For example, a welding jig for attaching the boss 38b or a mounting portion (not shown) of the rear axle case 27 to the transmission case 4
The setting interval between the mounting portion (not shown) and the welding jig can be changed and set in the direction of the wheel base so that the fixing position on the rail base on which these jigs are mounted can be changed and set. It is possible to relatively easily cope with a difference in wheelbase.

As shown in FIGS. 17 and 18, a reinforcing plate 54 for connecting the front portions of the left and right vertical frames 60, 60 is provided, and various electric components are mounted on the front surface of the reinforcing plate 54. That is, a relay 118 for monroe (rolling) control, a back buzzer 119, a flasher 120, a relay 121 for a fertilizer, and a relay 12 for a planting clutch.
2. A solenoid 123 for a timer relay, a hydraulic lock lever 124, an AD switching lever 125, and the like are provided on the front surface of the reinforcing plate 54, and a fuse box 126 is provided on the bent upper surface 54a. AD switching lever 12
5 is provided with a changeover detection switch 127, and although not shown, its changeover indicator lamp is provided on a panel of the operation unit.

As shown in FIGS. 2, 5, and 20, right and left brake pedals 61,
62 is supported so that it can be depressed and released freely. That is,
In order to arrange a pair of left and right brake pedals 61, 62 capable of operating the left and right side clutches / brake 30, 30, respectively, on a driving section floor 63 mounted on the body frame F, the right brake pedal 62 must be A pedal tread surface 62b is formed at the tip of a pedal main body 62a made of a rod material, and the pedal is depressed by turning around a right and left right pedal shaft portion 62c formed by bending the pedal main body 62a. The left brake pedal 61 is rotatably supported on the right pedal shaft portion 62c.

The right pedal shaft portion 62c is connected to the right main frame 38.
, Which is rotatably supported by penetrating left and right, and a sheet metal arm portion 62d fixed to a bent portion of the pedal body 62a with the right pedal shaft portion 62c, and a right side case portion 31 of the rear axle case 27. And a lever 64a of the right clutch / brake operating shaft 64 projecting from the first linking rod (first
An example of an interlocking member) is interlockingly connected at 65. The first link rod 65 is disposed on the right outer side of the right main frame 38 in a front-rear direction.

The left brake pedal 61 has a generally U-shaped bracket 61c which is rotatably fitted on a right pedal shaft portion 62c with a round pedal body 61a having a pedal tread surface 61b fixed to the tip thereof. The bracket 61c and a lever 66a of a left clutch / brake operating shaft 66 protruding from the left side case 31.
Are linked by a second link rod (an example of a second link member) 67. Each of the first and second interlocking rods 65, 67 is provided with a screw adjusting portion 65a, 67a for adjusting the total length.

The left lever 66a made of a plate is bent to raise the connecting portion of the rod so that the second interlocking rod 67 can move the left and right main frames 38, 38.
Above, and in front of the right vertical frame 60, and penetrates through holes 60A formed at the lower end of the left vertical frame 60. Left and right levers 66a, 6
4a are both protruded inward in the left-right direction of the vehicle body, and right and left side clutch portions 30a
Left and right AD operation shafts 74 and 72 acting on the lever and its lever 7
4a and 72a are arranged.

With the above arrangement, the left and right side case portions 31 are provided with the side clutch / brake 30 and the speed reduction mechanism 29 which are symmetrical and can be constituted by common components, and the center case portion 32 is formed of a simple pipe. The left and right brake pedals 61, 7 arranged on the right side of the right main frame 38 while maintaining the rear axle case 27 with a streamlined structure requiring only materials.
This realizes a simple clutch / brake operation structure in which the rod 2 and the left and right brake operation shafts 66 and 64 are simply rod-connected.

As shown in FIGS. 4, 5 and 15, at the front end of the left main frame 38, a shaft portion 76a of a main clutch pedal 76 is supported in a left and right direction. Then, while reinforcing the inner bearing portion, the above-described brake shaft 62c
Is provided with a reinforcing member 75 for reinforcing the support portion inside the inside.
That is, a reinforcing member 75 made of a U-shaped plate is provided to connect the left and right main frames 38 and 38 to each other and to face upward.
The bent portions 75a, 75a at both left and right ends are
a, 62c are formed on the left and right pivots.

Next, the vehicle body structure below the driver's seat will be described. As shown in FIGS. 1, 4, and 23 to 25, the driving section 5 includes a sheet metal floor step 49 having a step section 47 and a rear fender section 48, and a center cover 51 below the driving seat 50. And has a good appearance. The center cover 51 is formed in a bottomless box-shaped lid member that covers an opening 49 a formed below the driver's seat 50 in the floor step 49, and is provided so as to stand up from the floor step 49.

The center cover 51 has one knob bolt 52 inserted through the upper wall 51a thereof and an opening 49 formed in a downwardly-viewing U-shaped support member 53 standing upright from a vertical frame 60.
a, the lower end hem portion 51c of the center cover 51 is connected to the edge rib 49b, which is erected from the periphery of the opening 49a of the floor step 49, in the state of being attached to the vehicle body by being screwed through the a. It is configured to surround.

That is, as shown in FIG. 24, a large number of vertical ribs 51b extending vertically are integrally formed on the back surface of the lower end skirt of the center cover 51, and the vertical ribs 51b are formed.
The edge rib 49b of the floor step 49 is sandwiched between the b and the lower end hem 51a via a cushion rubber 57 having a substantially U-shaped cross section. With this sandwiching arrangement, the floor step 49 and the center cover 51 are securely and connected to each other without misalignment or floating, and have a good appearance.

The driver's seat 50 is pivotally supported by a front stay 55 erected from the front upper end of the vertical frame 60 at a lateral fulcrum Q so as to be able to swing forward and backward, and is provided in a pair on the right and left rear surfaces of the lower portion of the seat. The rubber suction seats 56 are mounted on the vehicle body by being mounted on the support member 53 via the upper wall 51a of the center cover 51. Therefore, the center cover 5
1, only a hole for inserting the front stay 55 and a hole for inserting the knob bolt 52 are formed, so that the inside of the center cover 51 cannot be seen from the outside.

As shown in FIG. 1, FIG. 2, and FIG. 26, the fertilizer applicators A arranged side by side are arranged on the vehicle body between the driver seat 50 and the seedling mounting table 16 in a front and rear view. A partition wall 87 made of a plate material integrally including the left and right rear fender portions (an example of a rear wheel fender) 48 is provided between the upper and lower sides of the fertilizer applicator A and the rear wheel 2 in a state extending across the left and right widths of the fertilizer applicator A. is there. In other words, the partition wall 87 is formed by the rear end of the floor step 49 made of synthetic resin, and receives the fertilizer spilled when the fertilizer is supplied to the hopper 88 or the fertilizer leaked from the feeding mechanism 89 and is mounted on the vertical frame 60. Fertilizer does not fall on the various mechanical devices, electrical components, etc.

A fertilizer application frame 81 for supporting the fertilizer application device A on the vehicle body includes a main support frame 90 erected from the rear end of the vertical frame 60 behind the partition wall 87 so as to bypass the partition wall 87. On the front side of the main support frame 90, an auxiliary support frame 91 is formed to penetrate the partition wall 87 in the vertical direction. Auxiliary support frame 9
Numeral 1 is formed of a plate material, and a through hole 87a formed in the partition wall 87 is a very small one, such as a slit in the front-rear direction (see FIG. 19). In addition, the mounting portion 90A at the lower end of the main support frame 90 has a pair of front and rear holes 81a, 81a of the vertical frame 60 so as to be usable with any of the two types of wheel bases. Two pairs of front and rear bolt insertion holes 90a, 90a are formed at intervals in the front and rear.

The step frame 59 for supporting the floor step 49 has a front mounting portion 59A in the left and right direction in which the inside is fixed to the main frame 38 in the left and right direction of the vehicle body, and the left and right sides in which the inside is fixed to the vertical frame 60 in the left and right direction of the vehicle body. It is constituted by a single pipe bent in an approximately inward open U-shape in plan view, comprising a rear mounting portion 59B oriented in the front direction and a support portion 59C facing front and rear connecting the front and rear mounting portions. .

As shown in FIGS. 14 to 17, the front mounting portion 59A of the right step frame 59 is
The inside of 8 is fixed to the side wall and rises vertically, is bent at the upper end, extends diagonally to the right, and is formed to extend right to the right side. The support portion 59C is parallel to the main frame 38. The rear portion of the support portion 59C is bent upward, extended obliquely rearward, and then bent inward, and is fixed to the rear mounting portion 5 which is fixed through the upper end portion of the vertical frame 60 at the front-rear intermediate portion.
It continues to 9B.

The left step frame 59 has the same structure as the right step frame 59 except that the front mounting portion 59A is fixed to the outer side surface of the left main frame 38 and rises vertically. . The distal ends of the left and right rear mounting portions 59B, 59B are connected and fixed integrally with each other by connecting metal fittings 92 between the left and right vertical frames 60, 60 to improve the support strength.

A pair of front and rear step support frames 93, 93 are provided to secure the support strength of the support portion 59C of the step frame 59. That is, the support frame 93 made of a plate material bent so that the cross section becomes a backward U-shape is attached to the left and right long members fixed to the main frames 38, 38 while crossing the left and right main frames 38, 38. The supporting parts 59C, 5
9C and integrated. At the left and right central portions of both step supporting frames 93, 93, cut-out portions 9 recessed downward to allow wire harnesses and various operation rods to pass therethrough.
3a are formed. Also, both step supporting frames 9
A step 94 made of sheet metal is bolted to the outer ends of the members 3 and 93 so as to straddle them.

The step frame 59 and the step supporting frames 93, 93 constitute a basket-shaped floor frame f for receiving and supporting the floor step 49. As shown in FIG. 19, a floor step 49 made of sheet metal is provided on the floor frame f, and a rubber floor mat 106 is laid thereon. In the floor step 49 and the floor mat 106, a hole 107 for viewing the left and right front wheels, a hole 108 for a brake pedal, a hole 109 for inter-shift operation, and a hole 110 for a differential lock pedal are commonly formed.

The floor step 49 includes the refueling hole 11
1. A hole 112 for manual operation of a solenoid, a hole 113 for inspection related to the HST 19 such as a control valve and a relief valve, a notch groove 114 for the main clutch pedal 76, and the like are formed. A longitudinal hole 115 which is long in the front and rear direction corresponding to the groove 114, and an opening / closing mat portion 117 surrounded by a pair of left and right slits 116, 116 extending rearward from the front end of the mat are formed. That is, the opening / closing mat portion 117
When the front end is turned up, the oil supply hole 111, the manual operation hole 112, and the inspection hole 113 of the hydraulic related equipment of the HST 19 are exposed. That is, these inspection holes 111 to 113 are usually provided in the floor mat 106.
Is closed.

For reference, a case where wide steps (auxiliary steps) 95 are provided on the left and right of the floor step 49 will be described. As shown in FIGS. 2 and 22, the wide step 95 includes a substantially inward U-shaped pipe frame 97 that forms an outer shell and a pair of front and rear sheet metal auxiliary frames 9.
Auxiliary frame 99 which is formed by fixing and integrating 8,98
The auxiliary step surface 100 made of sheet metal or synthetic resin is bolted. The rear part of the pipe frame 97 is lifted obliquely upward, and the steel plate inclined plate 100a is fixed, and the front and rear auxiliary frames 98, 98 and the pipe frame 97 are connected by an inner portion as a wide step 95. A bar material 101 is provided.

As shown in FIGS. 16 and 22, the mounting of the wide step 95 requires the mounting of a spare seedling mounting frame 102 beside the bonnet composed of a front support pipe 103 and a rear support pipe 104. The front end of the auxiliary step surface 97 is bolted to the front support pipe 103, and the front part of the auxiliary step surface 100 is received and supported from below by a receiving piece 104a fixed to the rear support pipe 104.

As shown in FIG. 21, the front and rear auxiliary frames 98, 98 have their left and right intermediate parts connected to the outer end of the step support frame 93 by one bolt 105, and the body of the auxiliary frame 98 is Inner end 98a
The step support frame 93 is vertically contacted so that upward movement of this portion is prevented. In other words, a downward load such as when a person rides acts on the wide step, and a force of a component which tends to move upward acts on the inner end 98a on the moment. Only the upper surface of the portion 98a needs to be applied to the lower surface of the step support frame 93, and a structure without using bolts is possible.

The boarding / alighting steps provided below the outer end of the wide step 95 are the same as those bolted to the floor frame f, and are set so that they can be conveniently replaced.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter.

FIG. 2 is an overall plan view of a riding rice transplanter.

FIG. 3 is a side view showing an arrangement structure on a floor at a front portion of a vehicle body.

FIG. 4 is a side view showing a vehicle body structure in a front and rear central portion.

FIG. 5 is a plan view showing a main structure under the floor of the vehicle body.

FIG. 6 is a development view showing a traveling system transmission structure inside the transmission case.

FIG. 7 is an exploded view showing the planting system transmission structure inside the mission case.

FIG. 8 is a rear view of a rear axle case part.

FIG. 9 is a sectional view showing the internal structure of the side case portion.

FIG. 10 is a side view of a main part showing a rolling support structure of a rear axle case.

FIG. 11 is a rear view showing a rolling regulation mechanism of the rear axle case.

FIG. 12 is a side view of the seedling planting apparatus.

FIG. 13 is a partially cutaway side view showing a structure near a rolling fulcrum of the seedling planting device.

FIG. 14 is a perspective view showing a skeleton structure of an airframe.

FIG. 15 is an exploded perspective view of a main frame and a vertical frame.

FIG. 16 is a plan view showing a frame configuration for a step floor.

FIG. 17 is a front view of the body frame that looks through the front of the vertical frame.

FIG. 18 is an exploded perspective view showing electric devices mounted on the front surface of the vertical frame.

FIG. 19 is a perspective view showing a floor step.

FIG. 20 is a perspective view showing a shaft support structure of the side brake pedal.

FIG. 21 is a front view showing a mounting structure of a wide step.

FIG. 22 is a perspective view showing the structure of a wide step.

FIG. 23 is an exploded perspective view showing a vehicle body structure under a driver seat.

FIG. 24 is an enlarged sectional view showing a structure of a portion where a center cover and a floor step are joined;

FIG. 25 is a sectional front view showing a vehicle body structure below a driver seat;

FIG. 26 is a side view showing a fertilizer application unit.

[Explanation of symbols]

 Reference Signs List 2 rear wheel 4 transmission case 5 driving section 6 lifting link mechanism 7 planting section 12 HST 16 seedling mounting table 27 rear axle case 38 main frame 48 rear wheel fender 49 floor step 50 driving seat 54 reinforcing plate 54a upper surface 59 step frame 59A Front mounting part 59B Rear mounting part 59C Support part 60 Vertical frame 77 Mounting part 81 Fertilization frame 87 Partition wall 90 Main support frame 91 Auxiliary support frame 93 Step support frame 95 Auxiliary step 98 Auxiliary frame 98a Aircraft inner end 106 Floor mat 112, 113 Inspection hole 116 Slit 118 Electrical equipment A Fertilizer application F Body frame f Floor frame

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Nariyoshi 64, Ishizukita-cho, Sakai City, Osaka Prefecture Inside Kubota Sakai Plant (72) Inventor Emiko Sugiyama 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house (72) Inventor Yoshiaki Sonoda 64, Ishizukita-cho, Sakai City, Osaka Prefecture Inside the Kubota Sakai Plant (72) Inventor Tetsuya Matsumura 64, Ishizukita-machi, Sakai City, Osaka Prefecture Inside the Kubota Sakai Plant, Inc. (72) Inventor Yoshikiyo Nakagawa 64 Ishizukita-cho, Sakai City, Osaka Inside Kubota Sakai Works

Claims (7)

[Claims] 1. A lifting link for connecting a planting section so as to be able to move up and down, comprising a pair of left and right main frames connecting a transmission case arranged at a front part of the body and a rear axle case arranged at a rear part of the body. A vertical frame made of sheet metal having a mounting portion of a mechanism at a rear end portion is provided in a state of standing up from each of the rear portions of the main frames, and a plurality of the mounting portions are spaced apart from each other in front and rear of the vertical frame. The body structure of a riding type rice transplanter formed in Japan. 2. A fertilizer device arranged side by side on a vehicle body between a driver's seat and a seedling mounting table, and a left and right side between the fertilizer device and a rear wheel in a side view. The body structure of a riding type rice transplanter, wherein a partition wall made of a plate material integrally including a rear wheel fender is provided so as to extend across the left and right widths of the fertilizer application device. 3. A fertilizer application frame supporting the fertilizer application device on a vehicle body, a main support frame erected from a vehicle body frame at a rear side of the partition wall so as to bypass the partition wall, and a front side of the main support frame. 3. The vehicle body structure of a riding type rice transplanter according to claim 2, wherein the partition wall is constituted by an auxiliary support frame penetrating in a vertical direction. 4. A lifting and lowering unit for connecting a transmission case arranged at a front part of the fuselage and a rear axle case arranged at a rear part of the fuselage with a pair of right and left main frames, and connecting the planting part so as to be able to move up and down. A step frame for supporting a floor step of a driving unit, comprising a vertical frame having a mounting portion of a link mechanism formed at a rear end portion thereof and fixed to a state where the vertical frame rises from the rear portions of the left and right main frames. A left-right front mounting portion in which the inside is fixed to the main frame in the left-right direction of the vehicle body, a left-right rear mounting portion in which the inside is fixed to the vertical frame in the left-right direction of the vehicle, and these front and rear mounting portions are connected. A body structure of a riding type rice transplanter, which is formed in a substantially inwardly open U-shape in plan view, comprising: 5. A step support frame for providing a pair of left and right main frames for connecting a transmission case arranged at a front part of a fuselage and a rear axle case arranged at a rear part of a fuselage, Consisting of left and right long members fixed to these main frames in a state of crossing the left and right main frames, an auxiliary step is arranged laterally outside the floor step,
The left and right intermediate frame supporting this auxiliary step is bolted to the outer end of the step support frame at the left and right intermediate portion, and the body inner end of the auxiliary frame is prevented from moving upward. Body structure of a riding type rice transplanter abutted on the step support frame in a vertical direction as described above. 6. A main frame for connecting a transmission case with an HST disposed at a front portion of the fuselage and a rear axle case disposed at a rear portion of the fuselage is provided, and the main frame receives and supports a floor step of an operation unit. A basket-shaped floor frame to be attached, the floor steps are made of a plate material, and a flexible floor mat is laid on the floor steps. The H
A plurality of inspection holes for the ST and its related hydraulic equipment are formed in the floor step, and a slit is formed in the floor mat so that the floor mat at a portion located in the plurality of inspection holes can be turned up. The body structure of the riding rice transplanter that has been formed. 7. A lifting link for connecting a planting section so as to be able to move up and down, comprising a pair of left and right main frames for connecting a transmission case arranged at the front of the body and a rear axle case arranged at the rear of the body. The mounting portion of the mechanism is provided at the rear end portion, and the supporting portion of the driver's seat is provided at the front portion with the vertical frame made of sheet metal formed at the rear portion of each of the main frames, and the left and right vertical frames are provided. The vehicle body structure of a riding type rice transplanter in which a reinforcing plate for connecting the front portions is provided and electrical components are mounted on the front surface of the reinforcing plate.