JPH0867206A - Step adjusting device of tractor - Google Patents

Abstract

PURPOSE: To facilitate getting-on/off of an operator for a seat, by vertically shifting a step according to the vertical adjustment of the vehicle height. CONSTITUTION: A wheel 4 and a step 23 are installed so as to be shiftable vertically on a machine base 1 having a seat 10, and both are interlocked so that the step 23 is shifted in the same direction when the wheel 3 is shifted vertically.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a tractor (traveling vehicle body) or the like which is equipped with a seedling planting machine, a fertilizer applicator or the like before or after to become an agricultural working machine.

[0002]

2. Description of the Related Art The tractor described above has been proposed to adjust the vehicle height by moving wheels up and down in order to adapt to various agricultural works.

[0003]

When the machine base is raised by lowering the wheels, the steps are increased and it becomes difficult for the operator to get on and off the seat. The present invention ensures that the height of the step from the ground does not change so much even if the vehicle height is adjusted so that the operator can easily get on and off the seat.

[0004]

According to the present invention, in order to solve the above-mentioned problems, a machine base 1 having a seat 10 is provided with wheels 3 and a step 23 (30) so as to move vertically.
The step adjusting device in the tractor is characterized in that the two are interlocked so that the step 23 (30) moves in the same direction when the wheel 3 is moved up and down.

[0005]

Since the present invention is constructed as described above, when the wheel 3 is lowered, the machine base 1 supported by the road surface by the wheel 3 is lowered.
Goes up. Then, in conjunction with this, step 23 (30)
Goes down. On the contrary, when the wheel 3 is raised and the machine stand 1 is lowered, the step 23 (30) is also raised in conjunction with this.

[0006]

As described above, according to the present invention, when the machine base 1 having seats is lowered or raised by moving the wheels 3 up and down, step 23 (3
Since 0) moves up and down, the height of the step 23 (30) with respect to the ground hardly changes regardless of the up and down movement of the wheel 3. Therefore, the operator can always get on and off the seat 10 easily.

[0007]

Embodiments of the present invention will be described below. FIG.
As described above, a pair of front wheels 2 and rear wheels 3 are provided in front of and behind the machine base 1, respectively. A main gear box 4 is fixed to the front end of the machine base 1, and vertical cylinders 5 are provided on both sides of the main gear box 4 so as to rotate around its axis. Oval front wheel transmission case 6
Is attached to the lower end of the cylinder 5 so as to rotate around the lower horizontal shaft 7, a front axle 8 projects outward from above, and the front wheel 2 is attached to the protruding end. Therefore, when the front wheel transmission case 6 is turned upside down around the horizontal shaft 7, the front axle 8 is located below the horizontal shaft 7, the front wheels 2 go down, and the front part of the machine base 1 goes up. An engine 9 is attached to the center of the machine base 1, and a seat 10 is provided on the engine 9. The power of the engine 9 reaches the horizontal shaft 7 by the transmission shaft in the cylinder 5 after reaching the main gear box 4, and the front wheel 2 is transmitted via the gear 11 of the shaft 7 and the gear 12 of the front axle 8. It is designed to drive.

A pair of left and right rear wheel gear boxes 13 is provided at the rear end of the machine base 1, and transmission cases 14 are provided on the outer sides of the rear case 1 and the horizontal shaft 1, respectively.
It is provided so as to rotate around 5. The transmission case 14 has a rear axle 16 extending forward and having a rear wheel 3 at its tip. Then, a part of the power in the main gearbox 4 reaches the rear wheel gearbox 13 by the respective transmission shafts 17 extending from both sides thereof, and then passes through the horizontal shaft 15 and the transmission case 14. Is transmitted to the rear wheel 3.

Each arm 14a has its own transmission case 14.
It extends from the rear to the top. A post 18 extends upward from a rear portion of the machine base 1, and an end of a hydraulic cylinder 19 is swingably attached to a lower end portion thereof. The piston rod 20 projects rearward from the hydraulic cylinder 19, and the projecting end thereof is the arm 1
It is connected to the upper end of 4a. Then, when the oil discharged from the pump (not shown) enters the rear chamber of the hydraulic cylinder 19, the piston rod 20 is pulled back into the hydraulic cylinder 19, and the transmission case 14 rotates counterclockwise around the horizontal shaft 15. The rear wheel 3 descends by turning and the rear part of the machine body 1 is pushed up. On the contrary, when the oil discharged by the pump is put into the front chamber of the hydraulic cylinder 19, the piston rod 20 projects rearward, the transmission case 14 rotates clockwise around the horizontal shaft 15, and the rear wheel 3 moves. Ascend, and the rear part of the machine stand 1 descends.

A floor 21 is fixed on the machine base 1. A pair of front and rear guide tubes 22 on the left side of the seat 10 is on the floor 2
It is fixed at 1. The guide rods 23a extend upward from both ends of the step 23 in the front-rear direction, the guide rods 23a are inserted into the respective guide tubes 22 from below, and the step 23 moves up and down. Vertical guide groove 22
a is provided in each guide tube 22, and both ends of the operating rod 24 in the front-rear direction are fixed to the guide rod 23a through the respective guide grooves 22a. That is, when the operating rod 24 is moved up and down, the guide rod 23a slides in the guide tube 22, and the step 23 at the lower end moves up and down.

A receiver 25 is fixed to the floor 21 on the operating rod 24. The receiver 26 is fixed to the post in front of the left arm 14a. Both ends of the outer wire 27 are stopped by respective receiving members 25, 26, and both ends of the inner wire 28 passed through the receiving members 25, 26 have the operating rod 24 and the arm 14a.
Installed on. Therefore, when the rear wheel 3 moves up and down as described above, the step 23 is interlocked with the inner wire 28 and moves up and down.

2, 3 and 4 show another embodiment. Note that the members having the same reference numerals as those in FIG. That is, the basket-shaped guard 2
When 9 covers the upper half of the rear wheel 3 and divides into the crop,
This is pushed so that it is not caught in the rear wheel 3. The tip of this guard 29 extends forward to form step 30. The inner side of the guard 29 is rotatably attached to the rear axle 16 or a boss concentric with the rear axle 16, and the tip end thereof has a shaft 31.
Is attached to the tip of an L-shaped bell crank 32 attached to the machine base 1. The upper end of the bell crank 32 and the arm 14a are connected by a rod 33. Here, the length of the transmission case 14 and the bell crank 32 in the longitudinal direction and the length of the arm 14a and the bell crank 32 in the vertical direction are configured to be substantially the same, and these are parallel links, and the rear wheel 3 is When moved up and down, the guard 29 moves up and down while maintaining the same posture, and step 3
0 moves up and down in parallel with the ground.

Although the vehicle height is adjusted to a high level when the vehicle travels across crops, as described above, this tractor hardly changes the step height even if the vehicle height is increased. However, there is a problem that the step pushes down the crops during work traveling, but here, step 23 or 30 is set to the left and right position so as to pass through the crop strip together with the front wheels 2 and the rear wheels 3. As such, the problem is avoided.

As shown in FIG. 5, the upper half of the front wheel 2 may be covered with a similar guard 34, and a step 35 may be provided so as to project rearward from the guard 34. The tractor shown in the figure is a riding type rice transplanter with a seedling planting device 36 attached to the rear portion. That is, a pair of upper and lower links 37 project rearward from the post 18, and the link side hitch 3
8 is attached to the hydraulic cylinder 39 so that it can be moved up and down by a piston rod protruding and retracting from the hydraulic cylinder 39. The horizontal rod 40a is fixed to the upper end of the work machine side hitch 40, and the horizontal rod 40a is received by the V-shaped receiving groove 38a of the link side hitch 38. The pin 40b laterally projects from the intermediate portion of the work machine side hitch 40, and the hook 41 provided on the link side hitch 38 is hooked on the pin 40b.
Therefore, when the hook 41 is separated from the pin 40b, the working machine side hitch 40 separates upward from the link side hitch 38, and the horizontal bar 40a is hooked on the receiving groove 38a and the hook 41 is hooked on the pin 40b. 40 is fixed to the link side hitch 38. The hook 41 can be configured to be remotely operated from the seat 10.

The gear box 42 has a rolling shaft 43 in the front-rear direction.
It is attached to the lower portion of the working machine side hitch 40 so as to swing around it. A seedling stand 44 inclined forward and upward is provided on the gear box 42 and is driven to reciprocate left and right. A float 45 is attached below the gear box 42 and slides on a mud surface to level the ground as the rice transplanter advances. A planting rod 46 is provided after the seedling placing table 44, rotates in an up-and-down elliptical orbit, cuts off the seedlings on the seedling placing table 44, and floats 45.
It is designed to be transplanted on a mud surface that has been leveled.

A hopper 65 is provided above the post 18, and the fertilizer therein is fed by the rotation of a lower roll (described later) and guided by a hose 66 to form a mud surface groove formed by the groove forming tool 67. It is designed to be sprayed on. A marker or other actuating tool (not shown) is provided on the seedling planting device 36, and when the lever 47 of the tractor is operated, the wire 48 (FIG. 7) is displayed.
Is pushed and pulled to operate. The end of the wire 48 is configured as a joint 48a such as a ring or a hook, and is detachably provided on the end of the actuating tool or a wire extending from the actuating tool. The wire box 4 is attached to the post 18 by the hanging box 49 and is removed from the actuator side.
8 joints 48a are adapted to be hooked.

This hanging box 49 is shown in FIGS. 6 and 7.
It is configured like. That is, the plurality of L-shaped wire hooks 50 are pulled back by the springs 51 and project backward from the rear plate 52. When the wire hook 50 hooks the joint 48a, the spring 51 is compressed and moves backward (to the right with respect to the paper surface). The sensing plate 53 is the wire hook 50.
It is located on the left side of the rail and has a pair of rails 5 on each side.
It is designed to move to the left and right as guided by 4,55. Both ends of the sensing plate 53 are bent upward, extend upward from the elongated holes 54a of the rail 54, and are pulled toward the wire hook 50 by the left and right springs 56. That is, when the joint 48a is hooked on all of the plurality of wire hooks 50, the sensing plate 53 is pulled to the right by the spring 56, but if one of the wire hooks 50 is not hooked with the joint 48a, the sensing plate 53 is pulled. Does not move to the right because its movement is stopped by the wire hook 50 without the joint 48a. Switch 57
Is provided to the left of the sensing plate 53, and when the sensing plate 53 is pushed to the left by one of the wire hooks 50, a current flows and the alarm 58 is activated, and the sensing plate 53 is pulled by the spring 56. Moving to the right, the current stops and the alarm 58 is deactivated. Switch 59 is link side hitch 3
8 (FIG. 1), when the working machine side hitch 40 is fixed to this, the current flowing from the power supply to the switch 57 stops, and when the working machine side hitch 40 is removed, the current flows. Has become. Therefore, when detaching the seedling planting device 36 from the tractor, the ends of the respective wires 48 are separated from the work implement and hung on the wire hooks 50, and then the working machine side hitch 40 is removed from the link side hitch 38. At this time, if the joints 48a of all the wires 48 are hooked on the respective wire hooks 50, the alarm device 58 does not operate, but if the wire hooks 50 without the joints 48a are set to 1
Even if there is a warning, the alarm device 58 is activated. Therefore, wire 4
You can prevent forgetting to remove 8. The alarm device 58 may be replaced with the starter switch of the engine 9 (or together with the starter switch) to prevent the engine 9 from starting if the fitting 48a is forgotten to be attached to the wire hook 50.

The feeding roll provided in the lower part of the hopper 65 is constructed as shown in FIGS. 8, 9, 10 and 11. That is, as shown in FIG. 8, the rolls 60 are rotated (or swung) around the shafts 62 below the respective hoppers 65. The roll 60 has a plurality of grooves 60a on its cylindrical surface, and the grooves 60a are open to the left. The adjusting roll 61 is provided on the left side of the roll 60, and the same number of legs 61a as the grooves 60a project from this to the right.
Then, when each foot 61a is engaged with each groove 60a and the adjusting roll 61 is moved left and right, the substantial lateral width of the groove 60a can be adjusted. This groove 6
By adjusting the width of 0a, the amount of fertilizer fed from the hopper 65 can be adjusted. Further, as shown in FIG. 8, the right end of the groove 60a rises obliquely to the upper right from the bottom, and the right end of the foot 61a is formed vertically (the above is a well-known configuration). for that reason,
When the adjusting roll 61 is moved to the right end in order to minimize the feeding amount, the groove 60a becomes a V-shaped narrow and deep groove,
There is a possibility that the material that has entered the bottom of the groove 60a may be blocked and may not come out.

As shown in FIG. 10, when the adjusting roll 61 is moved to the right end, the right end of the groove 60a and the right end of the foot 61a are brought into contact with each other, and a hemispherical hole 63 is provided on the outer surface of the foot 61a. The holes 63 uniformly feed out a small amount of powder. Therefore, this fertilizer application device can be utilized for minute amount spraying of chemicals. FIG. 11 is a modification thereof. That is, when the adjusting roll 61 is moved to the right end, the groove 60a and the foot 6
A V-shaped groove 64 having a wide mouth and a shallow depth may be formed between the groove 1a and the groove 1a.

[Brief description of drawings]

FIG. 1 is a side view of a tractor to which the present invention is applied.

FIG. 2 is a side view showing another embodiment of the present invention.

FIG. 3 is a side view of a part thereof.

FIG. 4 is a plan view thereof.

FIG. 5 is a side view of another tractor.

6 is an enlarged plan view of a part of the tractor of FIG. 1. FIG.

FIG. 7 is a side view thereof.

FIG. 8 is a cutaway front view of a part of the fertilizer application apparatus.

FIG. 9 is an enlarged cutaway front view of a part showing a conventional example thereof.

FIG. 10 is a front view showing an improved example thereof.

FIG. 11 is a front view showing another improvement example.

[Explanation of symbols]

 1 machine stand 3 wheels (rear wheels) 10 seats 23 steps 30 steps

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsu Nomura 1 Yakura, Tobe-cho, Iyo-gun, Ehime Pref., Technical Department, Iseki Agricultural Machinery Co., Ltd. Technical Department (72) Inventor Kazushi Ochi 1 Yakura, Tobe Town, Iyo-gun, Ehime Prefecture

Claims (1)

[Claims] 1. A machine base 1 having a seat 10 is provided with wheels 3 and steps 23 (30) so as to move up and down, and when the wheels 3 are moved up and down, steps 23 (30) move in the same direction. The step adjusting device in the tractor is characterized in that the two are interlocked.