JPH079699Y2 - Seat equipment for special work vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a seat device for a special work vehicle.

(Prior Art) In a special work vehicle, the vertical position of the seat is adjusted so that an operator can look at the position of the work machine and perform a safe, reliable, and quick operation.

A conventional example of the seat device for this special work vehicle will be described with reference to FIG. 6. (a) is a seat, (b) is a backrest, (c) is a vertical slide rail fixed, and (d) is seat positioning. The lever (e) is the main bracket, the seat (a) is attached to the main bracket (e), the backrest (b) is attached on the rear part of the seat (a), and the seat positioning lever (d) is the main. It is rotatably attached to the front part of the bracket (e), pulls the seat positioning lever (d) upward, and the movement of the seat positioning lever (d) is transferred to the main body via a motion transmission mechanism such as a rod or lever. Tell the seat positioning pins attached to the rear of the bracket (e),
The seating positioning pin is projected rearward from the rear portion of the main bracket (e), and the seating positioning pin is selectively engaged with one of a plurality of positioning holes formed in the slide rail (c), The vertical position of the seat (a) is adjusted.

(Problems to be solved by the invention) In a vehicle with a ceiling, there is a limit to the height of the cab,
I can't raise my seat high enough. In other words, when the worker is only in the driver's cab and operates the work machine, even if he / she has enough, when he / she operates the work machine by moving his / her head out of the ceiling, in this case ， The worker is forced to take a middle waist or a standing posture, becomes an unstable posture, and is safe.
There was a problem that the work could not be performed reliably and quickly, and the user was tired quickly.

The present invention is proposed in view of the above problems, and an object of the present invention is to provide a seat device for a special work vehicle that can perform work safely, reliably, and quickly and does not cause fatigue early. And there is a point.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a fixed vertical slide rail, a main bracket mounted on the slide rail so as to be vertically movable, and a main bracket mounted on the main bracket. One of a plurality of positioning holes formed in the slide rail by rotating the seat and the pivot pin provided in the front part of the main bracket so that the seat positioning pin is projected and retracted from the rear part of the main bracket. In a seat device of a special work vehicle having a seat positioning lever for selectively engaging with the backrest, a backrest mounted to the rear portion of the main bracket so as to be rotatable in the front-rear direction, and a backrest fixed to the backrest. The positioning plate for the backrest and the pivot pin provided on the rear portion of the main bracket are rotated to move the positioning pins for the backrest to the positioning plate for the backrest. And a backrest positioning lever that selectively engages with one of a plurality of positioning recesses provided on the base.

(Operation) The seat device of the special work vehicle of the present invention is configured as described above. When adjusting the vertical position of the seat, the seat positioning lever is pulled upward, and this movement is performed by the seat positioning pin. The main bracket and seat are raised and lowered by pulling out this pin from the positioning hole of the slight rail, then the seat positioning lever is released and returned to its original position, and this movement is transmitted to the seat positioning pin. Engage the pin with another locating hole in the slite rail. When adjusting the tilt of the backrest in accordance with the vertical movement of the seat, swing the backrest positioning lever to pull out the backrest positioning pin from the positioning recess of the backrest positioning plate, The tilt is tilted back and forth around the pivot, then the adjustment lever is released to return it to its original position, and the backrest positioning pin is engaged with another positioning recess to adjust the tilt of the backrest.

(Embodiment) Next, a seat device for a special work vehicle according to the present invention will be described with reference to an embodiment shown in FIGS. 1 to 5.
Is a seat, (2) is a backrest, (3) is a fixed vertical slide rail, (8) and (8) are boss portions for fixing the slide rail (3) to the vehicle body, and the slide rail (3) A plurality of positioning holes are provided in the vertical direction at intervals. Further, (7) is a main bracket that supports the seat (1), and the main bracket (7)
Is supported by the slide rail (3) so that it can be moved up and down. Further, (9) is a backrest frame fixed to the slide rail (3), and (13) is the backrest frame (9).
A plate fixed to the backrest, (12) a positioning plate for backrest fixed to the backrest (2), (12a) and (12b) a positioning recess provided in the positioning plate for backrest (12),
(4) is a pivot shaft that pivotally supports the backrest positioning plate (12) and the plate (13) of the backrest frame (9), and (5) is a backrest positioning pivotally supported by the plate (13). A lever (11) is a pin pivotally supported by the backrest positioning lever (5), and the pin (11) is engaged with a pin hole provided in the plate (13). Further, (14) is a spring for urging the backrest positioning lever (5) in the direction from the two-dot broken line position in FIG. 3 to the solid line position, (6) in FIG.
Is a seat positioning lever pivotally supported on the front portion of the main bracket (7), (17) (18) is a lever pivotally supported on the rear portion of the main bracket (7), and (16) is the lever (6) ( The rod connecting (17), (19) is the pin attached to the lever (18), and this pin (19) appears and disappears.
Selectively engage with one of the positioning holes of the above-mentioned slight rail (3). Also, (21) and (22) move the motion transmission mechanism (16) (17) (18) (rod (16)) interposed between the seat positioning lever (6) and the pin (19) to the right. A spring for urging (in the pin engaging direction), (25) in FIG. 5 is the ceiling above the driver's seat.

Next, the operation of the seat device of the special work vehicle shown in FIGS. 1 to 5 will be specifically described.

(I) To adjust the vertical position of the seat (1), hold the seat positioning lever (6) with your hand and press the arrow A
Pulling in the direction, the rod (16) is moved to the left against the springs (21) (22), and this movement is transmitted to the seat positioning pin (19) via the levers (17) (18). (19) is pulled out from the positioning hole of the slight rail (3) so that the main bracket (7) and the seat (1) can be moved up and down, and then the main bracket (7) and the seat (1) are moved up and down to move the seat ( Adjust the vertical position of 1), then release the hand from the seat positioning lever (6), and move the rod (16).
Is moved to the right by the springs (21) (22), and this movement is made through the levers (17) (18) to the seating positioning pin (19).
Then, the pin (19) is engaged with another positioning hole of the slight rail (3).

(Ii) When adjusting the tilt of the backrest (2) according to the vertical movement of the seat (1), push the lower part of the backrest positioning lever (5) against the spring (14) by hand, The backrest positioning lever (5) is rotated in the direction from the solid line position to the alternate long and two short dashes line position in FIG. 3 to set the backrest positioning pin (11).
Can be pulled out from the positioning recess (one of (12a) and (12b)) provided in the backrest positioning plate (12), and the backrest (2) can be tilted back and forth around the pivot axis (4). Then, tilt the backrest (2) forward and backward, then release the hand from the backrest positioning lever (5), and move the backrest positioning lever (5) by the spring (14) to the position of the alternate long and two short dashes line → The backrest positioning pin (11) is engaged with another positioning recess (one of (12a) and (12b)) by rotating in the direction of the solid line position to adjust the inclination of the backrest (2).

(Effect of the Invention) When adjusting the vertical position of the seat as described above, the seat device of the special work vehicle of the present invention pulls the seat positioning lever upward and transmits this movement to the seat positioning pin.
This pin is pulled out from the positioning hole of the slit rail, the main bracket and the seat are moved up and down, then the seat positioning lever is released and returned to its original position, this movement is transmitted to the seat positioning pin, and this pin is slid. Engage with other positioning holes in the rail. When adjusting the tilt of the backrest in accordance with the vertical movement of the seat, swing the backrest positioning lever to pull out the backrest positioning pin from the positioning recess of the backrest positioning plate, The backrest is tilted back and forth around the pivot, then the backrest positioning lever is released and returned to its original position, and the backrest positioning pin is engaged with another positioning recess to tilt the backrest. The adjustment allows the seat to be moved to a high seat position with a large stroll, and the backrest can be adjusted to an angle suitable for it, so that work can be performed safely, reliably, and quickly. ， It has the effect of not causing fatigue early.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a seat device for a special work vehicle according to the present invention, FIG. 2 is an enlarged vertical side view of an arrow II portion in FIG. 1, and FIG. 3 is an arrow III in FIG. FIG. 4 is an enlarged side view of the seat portion, FIG. 5 is an explanatory view showing the ceiling above the driver's seat, and FIG. 6 is a side view showing the seat device of a conventional special work vehicle. is there. (1) …… seat, (2) …… backrest, (3) …… slide rail, (4) …… axis, (5) …… positioning lever for backrest, (6) …… positioning lever for seat , (7) ...
… Main bracket, (11) …… Positioning pin for backrest, (12) …… Positioning plate for backrest, (12a) (1
2b) …… Positioning recess, (19) …… Seat positioning pin.

Claims (1)

[Scope of utility model registration request] 1. A fixed vertical slide rail, a main bracket mounted on the slide rail so as to be able to move up and down, a seat mounted on the main bracket, and a pivot pin provided at the front of the main bracket. A special work vehicle having a seat positioning lever that rotates around the center to cause the seat positioning pin to project from and retract from the rear portion of the main bracket and selectively engage with one of a plurality of positioning holes provided in the slide rail. In the seat device of (1), a backrest attached to the rear portion of the main bracket so as to be rotatable in the front-back direction, a backrest positioning plate fixed to the backrest, and a pivot pin provided at the rear portion of the main bracket. Rotate to the center to selectively engage the backrest positioning pin with one of the plurality of positioning recesses provided in the backrest positioning plate. Seating arrangement of the special work vehicle which is characterized in that it comprises a backrest positioning lever.