JP2593092Y2 - Work vehicle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working vehicle such as a tractor and, more particularly, to a working vehicle with a cabin equipped with a working machine and a control of a hydraulic cylinder for lifting and lowering the working machine.
The present invention relates to an arrangement of an operation switch for operating a valve on a side door.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 7 and 8, when a work vehicle, for example, a tractor 1 is equipped with a front loader 2, an electromagnetic type for controlling a hydraulic cylinder for raising and lowering the front loader 2 is used. The operation switch 5 for operating the control valve 3 is mounted on one side of the instrument panel 6 on a bracket 9 extending from the lower part of the handle operation base 7 so as to be easily operated during the driving operation.

[0003]

However, when the operator opens the right side door 11 of the cabin 10 and tries to enter the cabin 10, or when the operator opens the right side door 11 from the cabin 10 and goes out. In some cases, the operation switch 5 hinders the operator from entering or leaving the vehicle, which may cause inconvenience in getting on and off the vehicle.

Therefore, in the present invention, an operation switch for operating a control valve is provided on a connecting member connected to the door frame of the side door, and the operation switch moves integrally with the side door when the side door is opened and closed. Accordingly, it is an object of the present invention to provide a work vehicle provided with an operation switch which does not hinder the operator from getting on and off the tractor and facilitates the driving operation.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is a work controlled by a cabin (10) having a side door (11) and a control valve (3). Machine (2) lifting hydraulic cylinder (25, 3
2), a connecting member (43) connected to a substantially vertical intermediate portion of a door frame (11a) of the side door (11), and the connecting member (43). An operation switch (5) disposed on the inner side of the body (16) for operating the control valve (3);
It is characterized by having.

[0006]

When the operator opens the side door (11) of the work vehicle (1), the operation switch (5) is moved integrally with the side door (11), and the operator operates the cabin. (10) Go inside and sit in the driver's seat.
Then, when the side door (11) is closed, the operation switch (5) operates the door frame (11a) of the side door (11).
When the operation switch (5) is operated, the work machine (2) the control valve (3) for raising and lowering the hydraulic cylinder is operated based on the operation result of the operation switch (5). (25, 32) is controlled.

[0007] The reference numerals in parentheses are for referring to the drawings, but do not limit the present invention in any way.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The same members as in the prior art will be described with the same reference numerals.

As shown in FIGS. 1 and 2, the tractor 1 has a body 1 supported by a front wheel 13 and a rear wheel 15.
The front part of the body 16 is an engine part 17 and the rear part is a driving operation part 19. The engine unit 17 has an engine mounted thereon,
A front loader 2 is provided. A base of a lift arm 21 is rotatably supported on a support shaft 22 above a bracket 20 fixed to an intermediate portion of the body 16, and a support plate 21 a is fixed to an intermediate portion of the lift arm 21. Have been. The base of the hydraulic cylinder 25 is provided on the support plate 21a.
The tip of the rod of the hydraulic cylinder 25 is rotatably supported by a support shaft 26 below the bracket 20. An arm 27 is rotatably supported at a front portion of the lift arm 21, and a bucket 29 is rotatably supported at a tip portion by a support shaft 30. A base portion of a hydraulic cylinder 32 is rotatably supported by a support shaft 31 on a support plate 21b fixed to an intermediate portion of the lift arm 21, and a tip of a rod of the hydraulic cylinder 32 is connected to an arm 33. One end of a link 36 rotatably supported by a support shaft 33 at an intermediate portion and rotatably supported by a support shaft 35 at the tip of the arm 33 is supported above the bucket 29. It is rotatably supported by a shaft 37.

The body 16 is provided with an electromagnetic control valve 3 for operating a hydraulic cylinder near the base of the lift arm 21.

The front loader 2 comprises the above-described lift arm 21, hydraulic cylinder 25, hydraulic cylinder 32, bucket 29, and the like.
Based on the control of the valve 3, the hydraulic cylinder 25 is extended and retracted to pivot the arm 21 in the vertical direction, and the hydraulic cylinder 32 is extended and retracted to pivot the bucket 29 in the vertical direction.

The driving operation unit 19 is provided with a driving console 7 having a handle 39, a driver's seat 40, and the like, and is covered with a cabin 10. The cabin 10 has a cabin frame 10a, and the left and right side doors 1 are connected to the frame 10a via hinges 42, 42 (see FIG. 3).
1 and 11 are supported so that opening and closing are possible. Right side door 1
1 is a door frame 11a as shown in FIGS.
A horizontal frame 43 is connected to a substantially middle portion of the door frame 11a.
A rectangular frame is formed in a sectional view, and the left and right side plates 43 are formed.
a, 43b and upper and lower plates 43c, 43d.
3f is protruded, and a plurality of circular mounting holes are formed in the left side plate 43a, and seat nuts 45, 45, 45 are fixed corresponding to the positions of the mounting holes. Between the door frame 11a and the horizontal frame 43, transparent members 46, 46 of glass or the like are fastened to support plates 43e, 43f via elastic members 47, 47 of rubber or the like by fastening members. ing. Also, the mounting plate 49
Has a substantially pentagonal shape in a side view, a switch box support portion 49a protruding from an upper portion thereof, and a plurality of mounting holes formed in upper and lower portions. The left side plate 43
a, the mounting plate 49 is fixed by screwing a mounting bolt 50 to a nut 45 with a seat. The operation switch 5 is mounted on a switch box supporting portion 49a by mounting bolts 52, 52 below the switch box 5a. Handles 53 are fixed to nuts 54 with seats 54, 54 which are fixed and fixed corresponding to the lower mounting holes.
It is fixed at.

The switch box 5a has a substantially inverted L-shape with one upper part protruding above the switch box support portion 49a in a side view, and a cord 55 is connected to an intermediate portion thereof. The door 55 is wired to the rear of the body 16 via the rear side of the door frame 11a. Code 55
Connects the operation switch 5 and the control valve 3, and based on the operation of the operation switch 5, the control valve 3 controls the hydraulic cylinder 25 and the hydraulic cylinder 32, and expands and contracts the hydraulic cylinder 25 and the hydraulic cylinder 32. By the operation, the lift arm 21 and the bucket 29 are rotated in the vertical direction.

Next, the operation of this embodiment will be described with reference to FIG.

The operator is the right side door 1 of the tractor 1.
When the side door 1 is opened, the operation switch 5 is integrally moved to the outside of the machine body with the opening of the side door 11, and the operator enters the cabin 10 without being obstructed by the switch 5,
The driver sits in the driver's seat 40. Next, when the right side door 11 is closed, the operation switch 5 is located at a substantially middle portion in the vertical direction of the right side door 11, and when the operation switch 5 is operated in a predetermined manner, the electromagnetic control is performed based on the operation result of the switch 5. Valve 3 is a hydraulic cylinder 25 and a hydraulic cylinder 32
, The lift arm 21 and the bucket 29 of the front loader 2 are turned up and down. When the operator exits the cabin 10 and opens the right side door 11, the operation switch 5 is moved integrally with the side door 11, as described above.

[0017]

According to the present invention, a connecting member is connected to a substantially middle portion of the door frame of the side door in the vertical direction, and an operation switch is provided on the inner side of the connecting member in the body, so that the operator opens and closes the side door. At this time, the operation switch is moved integrally with the side door, and the operation switch does not hinder the operator from entering and exiting the cabin, so that the operator can get on and off smoothly.
When the operator sits on the driver's seat and closes the side door, the operation switch is disposed at a position where it can be easily operated, so that the operation switch can be easily operated and the efficiency of front loader work can be improved. Can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing an entire tractor equipped with a front loader to which the present invention can be applied.

FIG. 2 is a plan view showing the entire tractor equipped with a front loader including a cross section of a cabin.

FIG. 3 is a side view of the side door according to the embodiment of the present invention as viewed from the inside of the cabin.

FIG. 4 is a plan view showing a state where the switch box is mounted on a mounting plate.

FIG. 5 is a sectional view taken along line AA of FIG. 3;

FIG. 6 is a plan view showing a tractor to which a front loader is mounted when a side door is opened.

FIG. 7 is a plan view showing a conventional example in which a side door of a tractor equipped with a front loader is opened.

FIG. 8 is a side view showing a side door portion of a tractor in a conventional example.

[Explanation of symbols]

1 work vehicle (tractor) 2 work machine (front loader) 3 control valve (electromagnetic control)
5 Operation switch 10 Cabin 11 Side door 11a Door frame 16 Airframe 25 Hydraulic cylinder 32 Hydraulic cylinder 43 Connecting member (horizontal frame)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02F 9/16 A01B 63/10

Claims (1)

(57) [Scope of request for utility model registration] 1. A work vehicle comprising: a cabin having a side door; and a hydraulic cylinder for lifting and lowering a work machine controlled by a control valve, wherein the side door is provided at a substantially middle portion in a vertical direction of a door frame in a vertical direction. A work vehicle, comprising: a connected connecting member; and an operation switch disposed on an inner side of the connecting member inside the machine, for operating the control valve.