JPH0619403Y2 - Air suspension seat locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a locking device for an air suspension seat, and more particularly, to lock the air suspension seat at a required height by air pressure to stop the air suspension function. It was made possible.

(Prior Art) This type of air suspension seat can be maintained at a predetermined height even when drivers of different weights are seated, for example, in the driver's seat of a truck, and a seat between the seat and the vehicle floor is provided to improve riding comfort. Some have a suspension set.

Since the seat suspension has elasticity due to the air pressure, it rolls along with the rocking of the vehicle body on bad roads and adversely affects the riding comfort. Further, elasticity may not be required depending on the traveling road surface condition or the preference of the seated person.

In view of this point, there is an air suspension seat in which a seat suspension is provided with a lock mechanism so that the seating height is fixed and the fixing height can be adjusted in a plurality of stages (Japanese Utility Model Laid-Open No. 58-85534).

However, since this locking mechanism is a mechanical type, there is a drawback that it is difficult for a seated person to operate.

Therefore, the present invention has been made in view of the above point, and an object of the present invention is to provide a locking device that facilitates a locking operation of a seat suspension.

(Means and Actions for Solving the Problem) A lock device according to the present invention for achieving the above object is a bracket which extends from the movable frame in the direction of the base frame and has a plurality of holes formed in the vertical direction. And an air cylinder having a lock pin that fits into the hole of the bracket. Inside the air cylinder, there is integrally provided a piston having the lock pin at one end and sliding by air into the air cylinder. A lock pin that penetrates through the rod and has a lock pin and an extending portion that is parallel to the rod and is disposed outside the air cylinder integrally with the other end of the rod, and a sub lock pin that joins both ends to the extending portion and the lock pin. Is provided on the air cylinder side, a groove is formed in the lock pin to which the sublock pin is joined, and an end portion is protruded toward the lock pin in the extension portion to which the subblock pin is joined. And it is characterized in that by forming a.

Therefore, in the locked state, the lock pin fits into the hole of the bracket and the sub lock pin locks into the groove of the lock pin. Therefore, the locked state is not released depending on the air pressure state of the air cylinder, so that the lock is surely performed.

(Embodiment) An embodiment according to the present invention will be described with reference to FIGS. 1 to 5.

In the figure, an automobile seat (1) comprises a seat cushion (2) and a seat back (3), and the seat cushion (2) is fixed to a seat suspension (4).

The seat suspension (4) is formed by connecting the base frame (5) and the movable frame (6) in a pantograph shape by means of links (7) and (8) pivotally connected to each other at both sides in an intersecting manner.

One of the links (7) is pneumatically connected to the movable frame (6) so that the height of the movable frame (6) can be adjusted. Is maintained at a predetermined height.

The movable frame (6) is fixedly provided with a bracket (9) extending in the direction of the base frame (5) and constituting a lock device (11).

This bracket (9) has multiple holes (10) along the height direction.
.. is formed, and the lock pin (13) that constitutes the lock device (11) fixed to the base frame (5) has a hole in the bracket (9).
Fit in (10) and lock.

The lock device (11) includes a bracket (9) having the holes (10) ... and an air cylinder (12) having the lock pin (13). A rod (14) having a lock pin (13) at one end and a piston integrally sliding with the air in the air cylinder (12) penetrates through the rod (14). (13),
An extension portion (15) arranged parallel to the rod (14) and arranged outside the air cylinder (12) is integrally provided.

Then, the piston (1) in the air cylinder (12) is
Springs (17) and (18) are arranged before and after the sliding direction 6).

A lock air hose (19) is attached to one side of the air cylinder (12) with the piston (16) as a boundary, and a lock-off air hose (20) is attached to the other side.

Between the extending portion (15) and the lock pin (13), both ends of a sub lock pin (21) slidably provided on the air cylinder (12) side are joined, and the lock pin (21) is joined. 13) has a tip (22) of the sub lock pin (21).
Is provided with a groove (20 ') which engages with each other, and the extension (15) has a rear end (23) of the sub lock pin (21).
An inclined portion (25) for pushing the lock pin toward the lock pin (13) is provided in the moving direction of the extending portion (15).

As shown in FIGS. 3 and 4, the inclined portion (25) has a groove portion (2) of the lock pin (13) formed by the sub lock pin (21).
0 '), the distal end of the lock pin (13) protrudes toward the lock pin (13), and the front end of the lock pin (13)
It is formed on an inclined surface that is recessed away from the direction.

The sub lock pin (21) is biased toward the extending portion (15) by the elasticity of the spring (24).

(26) and (27) are buttons for sending out air into the air cylinder (12) via the lock air hose (19) and the lock-off air hose (20). (28) is an air tank, and (29) and (30) are sealing materials.

According to the lock device having the above-described configuration, in order to stop the suspension function and lock the seating height, the lock button (26) is pressed, and the lock air hose (19) causes the air cylinder (12). Air is delivered into the inside.

The piston (16) of the lock portion (14) moves in the direction of the arrow by the air pressure as shown in FIG.

Since the rod (14) moves, the lock pin (13) fits into the hole (10) of the bracket (19) and locks the seat cushion (2).

On the other hand, the extension portion (15) integrated with the lock pin (13) via the rod (14) moves the rod (14) in the same direction. Therefore, the rear end portion (23) of the sub lock pin (21) has the inclined portion (2).
5) Since it moves from the front end to the rear end, the sub lock pin (21) is pushed toward the lock pin (21) against the elasticity of the spring (24). Therefore, the tip portion (22) of the sub lock pin (21) is engaged and locked with the groove portion (20 ′) of the lock pin (21), and the lock pin (2
The axial movement of 1) is prevented.

Even if the air pressure in the air cylinder (12) is reduced, the lock pin (13) has the extension part (15) that allows the sub lock pin (21) to extend.
Since the movement in the (15) direction is blocked, the sub lock pin (21) is locked in the groove (20 ′) of the lock pin (13) to prevent the lock pin (13) from moving in the lock-off direction. It is blocking.

That is, the lock pin (13) is fitted into the hole (10) of the bracket (9) to surely lock the seat cushion (2).

On the other hand, to unlock, press the lock-off button (27) as shown in Fig. 4, and press the lock-off air hose.
Air is delivered into the air cylinder (12) via the (20).

Therefore, the piston (16) of the rod (14) moves in the direction of the arrow shown in FIG. 4 by the air pressure.

As the rod (14) moves, the lock pin (13) retracts from the hole (10) of the bracket (9), and locks the seat cushion (2).

At this time, the extension part (15) of the lock pin (13) is locked by the lock part (14).
Since it moves in the same direction as the sub lock pin (21),
Since the rear end portion (23) is biased toward the extending portion (15) by the spring (24) toward the inclined portion (25) of (15), the sub lock pin (21).
The tip end (22) of the lock pin (13) retracts from the groove (20 ') of the lock pin (13), and the restriction of the lock pin (13) retracting is released.

(Effect of Device) According to this device, the following effects are obtained.

Since the lock and lock-off of the seat cushion can be operated by the air pressure, the lock operation is facilitated.

Since the air of the air suspension can be used for the lock device, effective use of the air is used.

In the air cylinder of the locking device, a rod having a lock pin at one end and a piston that slides by the air in the air cylinder is penetrated, and the other end of this rod is parallel to the lock pin and the rod. Since the extending portion arranged outside the cylinder is integrally provided, and the sublock pin is provided between the extending portion and the lock pin, in the locked state, the movement of the lock pin is blocked by the sublock pin, Even if the air pressure in the air cylinder drops, the lock pin ensures the locked state. Also,
Since the extending portion is integrally provided with the lock pin via the rod, the structure is simple and the operation of the sub lock pin is accurate.

[Brief description of drawings]

1 is a side view of an air suspension seat using a lock device according to the present invention, FIG. 2 is a perspective view of the lock device shown in FIG. 1, FIG. 3 is an operation diagram of the lock device in a locked state, and FIG. FIG. 5 is an operation diagram of the lock device in the lock-off state, and FIG. 5 is a perspective view of an operating portion of the lock device. In the figure, (2) is a seat cushion, (4) is a seat suspension, (5) is a base frame, (6) is a movable frame, and (11) is a locking device.

Claims (1)

[Scope of utility model registration request] 1. A base frame body fixed to the vehicle floor side, a movable frame body connected to the base frame body so as to be able to move up and down by air pressure, and attached to the seat cushion side, and between the base frame body and the movable frame body. In the air suspension seat having a lock device that is provided in the lock mechanism and that the movable frame body is stepwise locked against the base frame body at a plurality of heights as necessary, the lock device is the movable frame. The bracket includes a bracket extending in the direction of the base frame from the body and having a plurality of holes formed in the vertical direction, and an air cylinder having a lock pin that fits into the hole of the bracket. It penetrates a rod that has a pin at one end and a piston that slides by air into the air cylinder, and the other end of this rod is parallel to the lock pin and rod. Is provided integrally with the lock pin, and the extension portion and the lock pin are provided with a sub lock pin for joining both ends to the air cylinder side, and the lock pin to which the sub block pin is joined is provided with a groove portion. A lock device for an air suspension seat, characterized in that an inclined portion having a terminal end projecting toward the lock pin is formed in an extending portion to which the pin is joined.