JPH068750Y2 - Chair seat up / down equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a seat lifting device for a chair that can lift and rotate the seat of a beauty salon chair or the like.

[Conventional technology]

Conventionally, a seat lifting device for a beauty chair of this type is configured such that an elevating cylinder for elevating the seat can be rotated with respect to an elevating outer cylinder into which the elevating cylinder is inserted. The reason why it does not rotate inadvertently is that the weight of the person sitting on the seat attached to the upper end of the elevating cylinder and other factors are loads.

Therefore, by forcibly rotating the seat portion, the elevating cylinder also rotates, so that the seat portion can be changed in any direction.

Further, as described in Japanese Patent Publication No. 54-6947, a structure in which an elevating member and a seat portion are integrally formed, and the elevating member can be rotated between the elevating member and a member using the elevating member as a support guide. Equipped, normally, the lifting member only provides lifting motion,
There is known a configuration in which, when the seat portion is forcibly rotated, if necessary, the elevating member integrated with the seat portion is provided with a mechanism for rotating with respect to a member for supporting and guiding.

However, even in such a configuration, since the lifting member integrated with the seat part performs two operations of lifting and rotating, it is necessary to consider the mounting accuracy between the lifting member and the member that supports and guides the lifting member. However, repairing the most damaging lifting member was difficult.

[Problems to be solved by the device]

As described above, in order to eliminate the disadvantage that the rotation stop and rotation releasing means of the elevating cylinder are positively provided between the elevating cylinder and the member for supporting and guiding the elevating cylinder, in the present invention, the elevating cylinder and the seat portion are provided. Side mounting frame is configured separately, and the elevating cylinder gives only the raising / lowering motion, and only the mounting frame on the seat part gives the rotating motion to the elevating cylinder fixed in the rotating direction. SUMMARY OF THE INVENTION It is an object of the present invention to provide a chair seat raising / lowering device that eliminates the need to consider the mounting accuracy between the lifting member and the member that supports and guides the lifting member as described above, and minimizes the failure of the lifting member.

[Means for solving problems]

The present invention provides a chair seat raising / lowering device which solves the above-mentioned drawbacks of the conventional chair seat raising / lowering device, and includes a lifting outer cylinder fixed to a substrate described on a floor or the like. ,
An elevating cylinder that is inserted between the elevating outer cylinder by a key and a key groove so that it can only elevate and lower, an annular V groove fixed to the upper end of the elevating cylinder and a V hole in the outer peripheral surface, and V holes at several places. A formed bracket and a mounting frame for mounting a seat portion having a shape surrounding the periphery and upper surface of the bracket are provided on the upper part of the bracket, and between the upper surface of the bracket and the lower surface of the mounting frame for mounting, A ball is placed, a screw provided on the inner peripheral surface of the mounting frame is fitted into an annular V groove formed around the bracket, and a V hole formed at several places around the bracket is mounted. It is characterized in that a urged ball is fitted to the V hole side provided at an appropriate position on the inner peripheral surface of the frame.

[Action]

According to the present invention, since the elevating cylinder is always free to move up and down with respect to the elevating outer cylinder due to the fitting of the key groove and the key, and is not movable in the rotating direction, the seat portion due to the rotation of the elevating cylinder is Although the rotation can be prevented, the seat can be turned in any direction because it can rotate with respect to the elevating cylinder, and if the rotation is stopped by the stopper means, the direction of the seat is clipped to a predetermined angle. Is something that can be done.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 is an elevating outer cylinder, which is fixed to a base placed on the floor.

Reference numeral 2 is an elevating cylinder housed inside the elevating outer cylinder 1 so as to be slidable up and down. The key 1a of the elevating outer cylinder 1 is inserted into a key groove 2a formed on one surface of the elevating outer cylinder 1 so that the elevating cylinder 2 does not rotate. It is configured.

The elevating cylinder 2 is screwed with a screw shaft that is rotated by a motor (not shown), and as the screw shaft rotates, it moves up and down in the vertical direction.

A bracket 3 fixed to the upper end of the elevating cylinder 2 by a nut 4 is fastened in a rotational direction.

Reference numeral 5 denotes a mounting frame to which the lower surface of the seat portion is fixed and mounted, and is mounted with the ball 10 interposed between the mounting frame and the bracket 3. Therefore, the mounting frame 5 is rotatable with respect to the bracket 3.

An annular V groove 3b is formed on the outer peripheral surface of the bracket 3, and a spherical portion 6a at the tip of a screw 6 screwed into several points on the outer periphery of the mounting frame 5 is inserted to such an extent that the V groove 3b is not tightened. . Therefore, the bracket 3 does not easily come out of the mounting frame 5.

Further, on the outer peripheral surface of the bracket 3, V holes 3c are formed in several places in parallel with the V groove 3b, and a ball 7 of a stopper 9 formed on the outer peripheral surface of the mounting frame 5 is inserted. The ball 7 is biased by a spring 8 and
Is constantly pressed to the V hole 3c side.

Therefore, when the ball 7 is fitted into the V hole 3c by the pressing force of the spring 8, the mounting frame 5 is prevented from rotating, that is, the seat portion is prevented from rotating. But sphere 7
Is fitted into the V hole 3c only by the pressing force of the spring 8, so if the mounting frame 5 is strongly rotated via the seat portion, the ball 7 slips out of the V hole 3c and the mounting frame 5 is rotated. Try to. That is, the seat part can rotate.

Therefore, the seat portion is rotated while being click-stopped at a predetermined angle.

As the stopper for stopping the rotation of the mounting frame 5, in addition to the engagement between the ball 7 and the V hole 3c in the above-described embodiment, the shape of the leaf spring, the unevenness, and other stopper mechanisms can be used.

[Effect of device]

According to the present invention, since the elevating cylinder is not rotatable with respect to the elevating outer cylinder due to the fitting of the key and the key groove as described above, the elevating cylinder is surely moved up and down with the rotation of the drive source such as the motor. Then
Therefore, unlike the conventional one in which the lifting and lowering cylinder is prevented from rotating by using the weight of a person sitting on the seat, the seat does not rotate unintentionally when the load is removed, and the seat is mounted. Since the mounting frame can freely rotate with respect to the bracket fixed to the elevating cylinder, it is possible to freely change the direction of the person sitting on the seat, and the rotation of the seat with respect to the bracket of the mounting frame. By stopping the rotation with a stopper means, it can be stopped while pointing in any direction. Furthermore, since the mounting frame was prevented from coming off the bracket inadvertently, it has the effect of improving safety etc. Is.

In the present invention, the elevating cylinder and the mounting frame on the seat portion side are configured separately, and the elevating cylinder provides only the elevating operation, and the mounting frame on the seat portion side with respect to the elevating cylinder fixed in the rotating direction. By adopting a configuration in which only the rotating motion is provided, it is possible to eliminate the need to consider the mounting accuracy between the lifting member and the member that supports and guides the lifting member, and minimize the failures that are likely to occur in the lifting member portion. It has an effect.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention, and FIG. 2 is a horizontal sectional view thereof. 1 ... Lifting outer cylinder, 1a ... Key, 2 ... Lifting cylinder, 2a ... Key groove, 3 ... Bracket, 3c ... V hole, 5 ... Mounting frame, 7 ...
Ball, 8 ... Spring, 9 ... Stopper.

Claims (1)

[Scope of utility model registration request] 1. A key 1a and a key groove 2a between a lifting outer cylinder 1 fixed to a substrate placed on a floor or the like, and the lifting outer cylinder 1.
And an elevating cylinder 2 that is inserted only by elevating and lowering, and an annular V groove 3 that is fixed to the upper end of the elevating cylinder 2 and has an outer peripheral surface.
b and bracket 3 with V holes 3c formed in several places
And a mounting frame 5 for mounting a seat portion having a shape surrounding the periphery and the upper surface of the bracket 3 is provided on the upper part of the bracket 3, and between the upper surface of the bracket 3 and the lower surface of the mounting frame 5 for mounting. , The balls 10 are arranged, the screws 6 provided on the inner peripheral surface of the mounting frame 5 are fitted into the annular V-shaped groove 3b formed around the bracket 3, and the balls are formed at several places around the bracket 3. A seat lifting / lowering device for a chair, characterized in that a ball 7 urged toward the V hole 3c provided at an appropriate position on the inner peripheral surface of the mounting frame 5 is fitted into the V hole 3c.