JPH0343066Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention relates to a riding working vehicle such as a riding rice transplanter or a riding rice paddy soil seeding machine, particularly a riding working vehicle for paddy fields equipped with a fertilization device. relates to a step in a passenger work vehicle and its support structure.

(b) Conventional technology Generally, a passenger rice transplanter has a step installed from the bottom of the driver's seat to the side of the bonnet.
The step has a bonnet side portion that is higher than the driver's seat, and is made of a single steel plate. Furthermore, the step made of one steel plate is supported at its rear by a frame that connects the front and rear transmission cases, and at the front by the front transmission case and front axle via one stay each on the left and right. (Jitsukai 58-153135)
(see publication).

(c) Problems to be solved by the invention Therefore, the width of the step piece is relatively narrow and there is not enough area for footrest, which sometimes causes problems when getting on and off the ridge and supplying seedlings. Furthermore, in order to widen the steps, conventional supporting means require thick steel plates and thick stays in addition to strength, resulting in increased weight and cost.

(d) Means for solving the problem The purpose of the present invention is to solve the above-mentioned problems. For example, as shown in FIGS. A step 17 is disposed extending from the bonnet to the left and right sides of the bonnet that covers the engine, and the step 17 consists of at least a central step piece 17c and outer step pieces 17b located outside the central step piece. Then, the outer end of the central step piece 17a and the inner end of the outer step piece 17b are fixed to each other, and the outer step piece 17b is fixed to the tip of the main piece 40a of the support bracket 40 attached to the front axle 37. - A support bracket that supports the center step piece 17c and fixes and supports the outer end of the central step piece 17c to the tip of the sub-piece 40b fixed to the main piece 40a, and expands upward into a bifurcated shape. 40
The main piece 40a and the secondary piece 40b, and the outer step piece 17b and the central step piece 1 fixed together.
7c is characterized by a triangular frame structure.

(e) Function Based on the above-mentioned structure, the driver's seat is used for getting on and off, replenishing seedlings, and supplying fertilizer to the fertilization tank 19 using the wide step consisting of the central step piece 17c and the outer step pieces 17b, 17b. Also,
When the driver's seat is placed on the outer step piece 17b, the load is transferred to the fixed case 39 of the front axle 37 via the main piece 40a of the support bracket 40.
(Head cover 45) and the secondary piece 4
An outer step piece 17 made of a relatively thin steel plate is carried by the central step piece 17c via the outer step piece 17c.
b is prevented from deflecting. Similarly, even if a load is applied to the outer end of the central step piece 17c, it is carried by the outer step piece 17b and is prevented from bending.

(f) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in FIG. 3, the riding rice transplanter 1 has front wheels 2.
It has a traveling body 5 supported by rear wheels 3, and an engine is mounted on the front part of the traveling body 5 covered by a bonnet 6, and an intermediate part between the front and rear wheels, that is, the body A driver's seat 9 is arranged so that the seat 7 is located at the center of gravity. Further, the traveling body 5 has a front transmission case 10 located at the front wheel portion and a rear transmission case 11 located at the rear wheel portion, and these two cases 10 and 11 are connected by a frame 12.
Furthermore, a planting section 13 is supported at the rear of the traveling body 5 via a link 8 so as to be able to rise and fall freely, and a large number of planters P and two and a half pine seedlings are placed in the planting section 13 in the vertical direction. A long seedling stand N is provided.

And, as shown in detail in FIGS. 3 and 4,
The engine extends forward from the front transmission 10.
It is mounted on a fixed front frame 15, and the front frame 33 is configured such that its vertical width becomes wider toward the rear, and the base end of the front frame 33 is equipped with a steel plate that passes through the fuselage in the lateral direction. A pipe 14 is fixedly installed, and a bumper 16 is fixedly installed at the tip. Further, steps 17 are arranged extending from both sides of the seat 7 in the driver's seat 9 to both sides of the bonnet 6, and at the top of both sides of the bonnet 6 in the step 17, there are fertilizer tanks 19 for paste or liquid fertilizer. 19 are arranged. These fertilizer tanks 19 are supported by the bumper 16 by a stay 20 at the front, and by a stay 2 at the rear.
1 is supported by the front frame 15, and there are step passages 17a, 17 between the bonnet 6 and the bonnet 6.
It has a. Further, a communication hose 23 that communicates both tanks 19 is provided so as to penetrate and be supported by the pipe 14. Furthermore, a suction hose 25 is connected to the communication hose 23 from a branch pipe 24 below the step 17. ing. Further, the suction hose 25 extends rearward from below the step 17, and a pump device 26 is disposed below the step 17 in the driver's seat 7 portion.
is connected to. Furthermore, the pump device 50 is guided to each fertilizer flow detection sensor 29 and switching valve 30, which are installed side by side in the lateral direction of the machine, through hoses 27 corresponding to the number of planting rows, It is guided to a nozzle 33 near the planter P via a prevention valve 32.

On the other hand, as shown in detail in FIG.
It is composed of left and right front step pieces 17a, 17a, left and right outer step pieces 17b, 17b, and a center step piece 17c.
The front part a is fixed to the bumper 16 and is arranged on the left and right sides of the bonnet 6, and the outer step piece 1
7b is arranged on the outside of the driver's seat from the left and right of the seat cover 35 to the front step piece 17a, and the central step piece 17c is arranged on the driver's seat in front of the seat cover 35, and these step pieces are arranged on substantially the same plane. It is set up to form a wide flat surface. Further, as shown in FIG. 5, the front part of the central step piece 17c is fixed and supported by bolts 46 using the upper surface of the mounting plate 36 of the frame 12 fixed to the front transmission case 10. Both outer ends of the central step piece 17c and the outer step piece 17b are connected to the front axle 3.
They are each supported by the ends of two forks of a bifurcated support bracket 40 attached to the fixed case 39 of No. 7. Further, as shown in FIG. 6, the rear part of the central step piece 17c and the outer step piece 17b
The central part of the frame 12 is supported by a horizontal bar member 42 having a U-shaped cross section, which is attached to both frames 12, 12 via support plates 41, 41, respectively, and extends below the seat cover 35 in the lateral direction of the aircraft body. Similarly, the rear part of the outer frame 17b is supported by a horizontal bar member 43 that is attached to the frame 12 and extends below the seat cover 35 in the lateral direction of the machine body (see FIG. 4). More specifically, as shown in FIGS. 1 and 2, the bifurcated support bracket 4
0 consists of a main piece 40a made of a steel plate with a U-shaped cross section and a sub-piece 40b welded to the main piece 40a. It is fixed to the cover 45 with bolts 46, and
The other end, which is curved to be approximately horizontal, supports the outer step piece 17b from below and supports the bolt 46.
The bent and almost horizontal tip of the sub piece 40b is fixed to the central step piece 1.
The end portion 7c is supported from below and fixed with bolts 46. Note that both step pieces 17b, 1
7c has bent edges, which increase the strength of both step pieces, and the edges that abut each other are fixed with pins 47 or the like. Further, the head cover 45 of the front axle 37 has a convex cross section to form a bolt hole 46a for fixing the bracket. Therefore, a triangular frame structure is constituted by the main piece 40a and the secondary piece 40b of the support bracket 40, which expand upward in a bifurcated shape, and the outer step piece 17b and the central step piece 17c, which are fixed together. As a result, the outer end portions of the outer step piece 17b and the central step piece 17c are strongly reinforced with each other. Further, the suction hose 25 is guided through a triangular space C constituted by a bifurcated support bracket 40 and a step 17, and the hose 25 is prevented from touching the front wheel 2 and is branched. The tube 24 is held in place at the lowest position.

In addition, as shown in FIG. 7, the seat cover 35
is configured such that both sides thereof face downward and are recessed inwardly, and the recessed portions 35a form a sufficient area for placing the foot F on the step 17.

As shown in FIGS. 8 and 9, an adapter case 50 is used when changing the tread. The adapter case 50 has a length B that is half the length of the tread difference, and also extends from the end of the front transmission case 10 to the front axle 37.
The length to the bracket mounting surface c is also set to the same length B as the adapter case 50. Note that in this embodiment, the support bracket 40 is attached to the fixed case 3.
It is attached by a bolt to a bolt hole 46'a formed in the side surface of the adapter case 9, and therefore, the attachment surface c is a vertical plane similar to the attachment surface d of the adapter case 50.

Therefore, as shown in FIG. 8, when the tread is narrow, the support bracket 40 is attached by screwing a bolt into the bolt hole 46'a of the fixed case 39 in the front axle 37. Furthermore, as shown in FIG. 9, when the tread is changed to a wider position, the front transmission case 10 and the front axle
An adapter case 50 is interposed between the two and the support bracket 40 is attached to the attachment surface d of the case 50 with bolts. As a result, although the step support bracket 40 is attached to the front axle 37, it is not necessary to change the step 17 and its support means 40 even if the tread is changed.

Further, as shown in FIG. 10, the front axle 37 includes a fixed case 39 fixed to the mission case 10 and a boss portion 39 of the fixed case 39.
It consists of a movable case 51 that is slidably guided by a gear shaft 52, and a spring 53 is compressed between these cases 39 and 51 so as to surround a gear shaft 52, so that the traveling body 5 can freely swing up and down with respect to the front wheels 2. is suspended. Furthermore, the fixed case 39 and the movable case 51 are made of self-lubricating cast iron, and the two cases are in direct sliding contact and fitting, and the movable case boss portion 51a has an oil seal 55 and an O-ring 56 at its upper end. is arranged in an oil-tight manner. Furthermore, a groove 57 is formed in an annular shape at the base end portion of the movable case boss portion 51a.
When both cases 39 and 51 come into sliding contact, oil accumulated in the groove 57 is directly sent to the sliding contact portion. This results in
The conventionally required bush interposed between the two cases becomes unnecessary, the outer diameter of the movable case becomes smaller, and a back-up spring for the O-ring 56 becomes unnecessary.

Since this embodiment has the above-described configuration, the step 17 is a central step piece 17c in front of the driver's seat.
In addition, it has a wide and flat surface consisting of outer step pieces 17b, 17b and front step pieces 17a, 17a. In addition to being able to perform operations such as supplying paste fertilizer to plants, it is also possible to easily get on and off from the ridge through the front step 17a or through the outer step 17b, and it is also possible to easily perform seedling supply operations. Moreover, since the step 17 does not have a step, the user can safely move on the step 17 without tripping. At this time, the outer step piece 17b extending to the side of the seat cover 35 is also connected to the center step piece 17c.
Although it is located at a relatively high position on the same level as the above, the adoption of the long seedling tray N has raised the seedling supply position.
In addition to being able to work without any problems, 2.
Since there is usually no need for a spare seedling stand based on the long seedling stand N on which half a seedling can be placed, the step piece 17b extending to the rear functions very effectively. Furthermore, the recessed portion 35a on the side of the seat cover 35 allows the operation lever L (seventh
Figure) Although the space is secured, the footrest area can be substantially widened without increasing the step width, and seedling feeding work can be carried out safely and in a comfortable posture.

Further, the step 17 has its rear part supported by horizontal beam members 42 and 43 passing below the seat cover 35, and its front part attached to the central part of the mounting plate 3.
Since both outer sides of the step 6 are supported by the front axle 37, the wide step 17 can be reliably supported without bending or chattering. Further, when the driver rides on the outer step piece 17b and a load is applied, the load is transferred to the fixed case 39 of the front axle 37 (see FIGS. 8 and 9) via the main piece 40a of the bifurcated support bracket 40. Or, it is supported by the head cover 45 (see FIGS. 1 and 5), and is also carried by the central step piece 17c via the subsidiary piece 40b, and is similarly supported by the outer end of the central step piece 17c. When a driver rides on the vehicle, the load is also carried by the outer step piece 17b, which is advantageous in terms of strength.
Further, since the head cover 45 has a convex shape to form bolt holes 46a for attaching the support bracket 40, when disassembling the front axle 37, the cover 45 can be easily removed by holding the convex portion. be able to.

(g) Effects of the invention As explained above, according to the invention, since the outer step piece 17b is installed outside the central step piece 17c, a wide step 17 can be constructed.
It becomes extremely easy to get on and off from the ridge and move on the step 17, making various tasks easier. Further, the outer end of the central step piece 17a and the inner end of the outer step piece 17b are fixed to each other, and the outer step piece 17b is fixed to the tip of the main piece 40a of the support bracket 40 attached to the front axle 37. A support bracket 40 that supports the central step piece 17c and that fixes and supports the outer end of the central step piece 17c to the tip of the sub-piece 40b fixed to the main piece 40a and expands upward into a bifurcated shape. The main piece 40a and the secondary piece 40b, and the outer step piece 17b and the central step piece 17 fixed together.
Since the triangular frame structure is constructed at point c, both step pieces 17c and 17b mutually act as strong members and have high rigidity, and although a thin steel plate can be used for the step piece, it prevents bending etc. obtain.

Furthermore, when the suction hose 25 of the fertilizer application device is passed through the triangular space C formed by the bifurcated support bracket 40 and the step 17, damage to the hose due to contact with the front wheel 2 is prevented.
And, hold the hose 25 so that the branch pipe 24 is at the lowest position, and drain the drain hose D provided on the branch pipe.
(See Figure 4), the fertilizer inside the hose can be reliably discharged.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing the support structure of the step, Fig. 2 is a side view thereof, Fig. 3 is a side view showing a riding rice transplanter to which the present invention is applied, Fig. 4 is a plan view showing the step, FIG. 5 is a cross-sectional view taken along the line of FIG. 4, and FIG. 6 is a cross-sectional view taken along the line of FIG. 4. FIG. 7 is a cross section showing the seat cover portion. Further, FIG. 8 is a front sectional view showing a step support structure according to another embodiment, and FIG. 9 is a front sectional view showing the step support structure in a state where the tread is expanded. FIG. 10 is a sectional view showing a front axle used in the riding rice transplanter of this embodiment. 1... Riding paddy work vehicle (riding rice transplanter), 5...
Traveling aircraft, 6... Bonnet, 9... Driver's seat, 1
0...Front transmission case, 13...Paddy field working section, 17...Step, 17a...Front step piece, 17b...Outer step piece, 17c...Central step piece, 19...Fertilizer tank, 25 ... Suction pipe, 35 ... Seat cover, 37 ...
Front axle, 39...Fixed case, 40...
...Support bracket, 40a...Main piece, 40b...
Vice piece, 45...Head cover.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Riding paddy field work consisting of a paddy field work section supported so as to be able to rise and fall at the rear of a traveling machine with an engine mounted in the front and a driver's seat arranged behind the engine. In a car, a step is arranged from the driver's seat of the traveling aircraft to the left and right sides of the bonnet covering the engine, and the step comprises at least a central step piece and an outer step piece located outside the central step piece, and further comprises a step piece located outside the central step piece. The outer end of the central step piece and the inner end of the outer step piece are fixed to each other, and the outer step piece is fixed to the tip of the main piece of a support bracket attached to the front axle.
a main piece of the support bracket which supports the central step piece, and fixes and supports the outer end of the central step piece to the tip of the secondary piece fixed to the main piece, and expands upward into a bifurcated shape; A riding paddy field work vehicle characterized in that a triangular frame structure is constructed of a secondary piece, an outer step piece and a central step piece that are integrally fixed. (2) The riding paddy field work vehicle according to claim 1, wherein a suction hose of a fertilizer applicator is passed through the triangular space formed by the bifurcated support bracket and the step.