JP2552137Y2 - Operator seat locking device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for an operator seat provided on an industrial vehicle or the like.

[0002]

2. Description of the Related Art Conventionally, an industrial vehicle such as a wheel loader is provided with an operator seat on which an operator sits. In some operator seats, the front portion of the seat body is hinged by a hinge, and the entire seat body can be turned forward around the hinge.

[0003]

However, the above-mentioned conventional reversible operator seat has no mechanism for locking the seat body in a use position where the operator can sit down, and no mechanism for locking the seat body in the reverse position. If the operator accidentally touches the front end of the seat body, the operator inadvertently flips the seat body and the operator falls down. There was a problem of pinching. This idea was made to improve the above-mentioned problems.
An object of the present invention is to provide an operator seat locking device that can lock a seat body in a use state and a reversal state, thereby improving safety in use.

[0004]

According to the present invention, in order to achieve the above object, the front portion of the seat body is hinged to the front portion of the box by a hinge, whereby the seat body is turned forward around the hinge. In the operator seat, a lock lever for locking the seat body in the inverted position and a lock plate for locking the seat body in the use position are provided near the seat body, and a connecting rod is provided between the lock lever and the lock plate. Is linked.

[0005]

According to the above configuration, even if the user accidentally touches the front part of the seat body in use or touches the body of the inverted seat body by mistake, the seat body is not accidentally inverted or fall down. It is safe.

[0006]

An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view of an operator seat provided on an industrial vehicle or the like, and FIG. 2 is a partially cutaway side view in an assembled state.
In these figures, reference numeral 1 denotes a seat body, which comprises a seat 1a, a backrest 1b, and an armrest 1c, and a bracket 2 is fixed to a bottom surface of the seat 1a.

Reference numeral 3 denotes a box for supporting the seat body 1. A lower portion of the bracket 2 is fixed on an upper surface plate 3a for closing the upper surface of the box 3 so as to be openable and closable, and a front lower surface of the upper surface plate 3a. Protruding portion 3b protruding from
The hinges 4 hinge the space between the front inner surfaces of the box 3 so that the seat body 1 can be turned forward with the upper plate 3a around the hinges 4.

A long hole 3c is provided on the front side of the top plate 3a.
The lock lever 5 is vertically inserted into the elongated hole 3c. An intermediate portion of the lock lever 5 is rotatably and pivotally attached to a side surface of the protrusion 3b to which the hinge 4 is fixed by a pin 6. The lock lever 5 has an upper end portion on the front side. And a lock pin 8 protruding from the inner surface of the box 3 at the lower end of the lock lever 5 so as to be located slightly behind the pivot point of the lock lever 5. The engaging groove 5a to be engaged is notched.

On the other hand, another long hole 3d is formed behind the long hole 3c through which the lock lever 5 is inserted, and the lock plate 10 is inserted through the long hole 3d. The lock plate 10 is rotatably supported by a pin 11 on a bearing 3e having an intermediate portion projecting from the upper surface of the upper plate 3a, and is urged in a counterclockwise direction by a spring 12 fitted on the pin 11. Have been.

The upper end of the lock plate 10 and the upper end of the lock lever 5 are connected to each other by a connecting rod 13, so that the lock plate 10 rotates in conjunction with the rotation of the lock lever 5, and A lock pin 1 protruding from an inner surface of the box 3 is provided at a lower portion of the plate 10.
4 is formed with a hook 10a which is detachably engaged.

Next, the operation will be described. When the operator seat is in use, as shown in FIG.
Are engaged with the lock pins 14 to lock the sheet body 1 from being inverted. Therefore, even if a hand is accidentally put on the front side of the seat body 1 in this state, the seat body 1 is not inadvertently turned over and is safe.

Next, when the seat body 1 is turned forward, the handle 7 is turned in the direction of arrow a as shown in FIG. 2 to turn the upper end of the lock lever 5 clockwise.
By rotating the lock plate 10 interlocked with the lock lever 5 and the connecting rod 13, the hook 1 of the lock plate 10 is rotated.
0a is removed from the lock pin 14. And in this state, FIG.
When the seat body 1 is turned forward around the hinge 4 as shown in FIG. 7, the rear edge of the lever 5 comes into contact with the front lock pin 8. When the seat body 1 is further turned forward in this state, the lock lever 5 is further rotated with the lock pin 8 abutting on the trailing edge, and the locking groove 5 a formed at the lower end of the lock lever 5. The lock pin 8 is engaged as shown in FIG. As a result, the sheet body 1 is locked in the inverted state, so that even if the body touches the sheet body 1 by mistake, the sheet body 1 does not fall down carelessly.

When returning the seat body 1 locked in the inverted state to the use state, the handle 7 is turned in the direction of arrow a as shown in FIG. 4 and the lock lever 5 is turned clockwise. After the lock pin 8 is disengaged from the locking groove 5a, the seat body 1 may be rotated to the use position, and when the seat body 1 reaches the use position, the hook 10a of the lock plate 10 is moved rearward. Because it engages with the lock pin 14 of
The seat body 1 can be locked at the use position.

[0014]

[Effect of the Invention] As described in detail above, the present invention locks the seat body at the use position and the reversing position, so that carelessness can be inadvertently put on the front end of the seat body by mistake in use. Since the seat body does not turn over, the operator does not fall down and is safe. Also, even if a body or the like accidentally touches the sheet body in a state where the sheet body is inverted, the sheet body does not fall down carelessly, and there is no danger of pinching a finger or the like.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a lock device for an operator seat according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the assembled state.

FIG. 3 is an operation explanatory view when the seat body is inverted.

FIG. 4 is an explanatory diagram of an operation in a state where a seat body is inverted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat main body 3 Box 4 Hinge 5 Lock lever 10 Lock plate 13 Connecting rod

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-137054 (JP, A) JP-A-62-1113626 (JP, A) JP-A-57-104424 (JP, A) 170042 (JP, U) Japanese Utility Model Showa 60-69733 (JP, U) Japanese Utility Model 1-168329 (JP, U) Japanese Utility Model 3-60131 (JP, U) Japanese Utility Model 5-532 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. An operator seat in which a front portion of a seat body 1 is hinged to a front portion of a box 3 by a hinge 4 so that the seat body 1 can be turned forward around the hinge 4. A lock lever 5 for locking the seat body 1 in the inverted position near the body 1 and a lock plate 10 for locking the seat body 1 in the use position.
And a locking device for an operator seat in which the lock lever 5 and the lock plate 10 are linked by a connecting rod 13.