JPH071003Y2 - Height adjustment device for chairs, etc. - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height adjusting device for a chair or the like using a gas spring.

[0002]

2. Description of the Related Art Conventionally, as a height adjusting device for a chair or the like,
The one described in Japanese Utility Model Publication No. 59-5401 is known.

In the above-mentioned conventional publication, a spherical seat (104) is provided at the center of a push fitting (103) attached to a support (102) from a leg portion (101) of a chair, and a spherical seat (104) is provided above the spherical seat. The ring body (108) is concentric with the chair main shaft through the ring receiver (107) in the ring receiver attachment body (106) having the concave surface seat (105) into which the seat (104) is fitted.
A recessed seat of a required shape that receives the push pin (111) of the push valve body (110) of the gas spring (109) for moving up and down the seat plate while mounting the same and concentrically above the recessed seat (105). By providing (112) on the ring receiving mounting body (106), the push valve body (110) is pushed upward when the ring body (108) is tilted by a required angle, and the gas spring (109).
It is shown that the seat is moved up and down by actuating.

[0004]

However, in the above conventional technology, the ring body (108) is the leg portion (101) of the chair.
Since it is attached to the lower end and you operate by pressing any part of the ring body (108) with your foot, it is troublesome to actually move the seat up and down while pressing the ring body (108) with your foot while sitting on the seat. Not only the push valve body (1
There was a problem that the operation of 10) was difficult and the fine adjustment of the seat was troublesome.

Further, since the ring receiving attachment body (106) provided with the recessed seat (112) of a required shape for receiving the push pin (111) pushes the push pin (111) by pushing it strongly, the push pin (111) is pushed. There has been a problem that (111) is damaged, which causes a failure of the device.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a height adjusting device for a chair or the like, in which fine adjustment of a seat can be easily performed and less troubles occur. And

[0007]

In order to solve the above problems, in a height adjusting device for a chair or the like according to the present invention, a plurality of window holes are provided around the side wall of a hollow mounting frame that supports a seat or the like of the chair. In this mounting frame, the upper part of the gas spring with the gas pressure adjusting plug up is inserted and supported, and the upper surface of the disk mounted on the upper surface of the gas pressure adjusting plug is inserted into the mounting frame. The outer ends of a plurality of operating rods, which are brought into contact with the lower surface of the upper wall of the disc, and whose inner ends are fixed to the peripheral edge of the disk, project from the window holes, and the outer ends are provided concentrically with the gas spring below the seat It is characterized by being firmly attached to the ring.

Further, a support shaft projecting upward from the central portion of the upper surface of the pressing body, which abuts the spherical lower surface on the upper surface of the gas pressure adjusting stopper, penetrates a through hole formed in the central portion of the disk. Alternatively, it may be loosely inserted in a holding hole formed in the upper wall of the mounting frame so as to be tiltable.

Further, the upper surface of the gas spring is fitted into and supported by the support cylinder provided in the mounting frame, and the spherical surface of the pressing body is placed on the upper surface of the gas pressure adjusting stud so that the inside of the support cylinder can be raised and lowered. The upper surface may be made to protrude from the upper end opening of the support cylinder and brought into contact with the disk lower surface.

Further, a projecting piece projecting upward from a proper place on the upper surface of the disk may be loosely inserted in a holding hole formed in the upper wall of the mounting frame so as to correspond to the projecting piece.

[0011]

According to the present invention, even if a chair or the like is rotated or sitting on a seat, a disc tilted at a required angle when a user grips an arbitrary part of a ring below the seat and pushes it up or down. By this, the upper surface of the gas pressure adjusting plug is pressed (claim 1).

Further, a support shaft projecting upward from the central portion of the upper surface of the pressing body, which is in contact with the spherical lower surface of the upper surface of the gas pressure adjusting stopper, is passed through a through hole formed in the central portion of the disk. , If tilted freely into a holding hole formed in the upper wall of the mounting frame, the upper surface of the gas pressure adjusting stud is pressed by the spherical pressing body, and the pressing body moves laterally. It does not come off from the upper surface of the gas pressure adjusting tap (claim 2).

The upper surface of the gas spring is inserted into and supported by the support cylinder provided in the mounting frame, and is placed on the upper surface of the gas pressure adjusting spigot so that the inside of the support cylinder can move up and down. The upper surface of the support cylinder is projected from the upper end opening of the support cylinder so that it abuts the lower surface of the disk, and the pressing body pushes down the axial center of the gas pressure adjusting stud, and the tilted disk adjusts the gas pressure. There is no possibility of directly prying the stopper plug (claim 3).

Further, if a projecting piece projecting upward from a proper place on the upper surface of the disk is loosely inserted into a holding hole formed in the upper wall of the mounting frame corresponding to the projecting piece, the lower surface of the central part of the disk is always kept. The ring can be brought into proper contact with the gas pressure adjusting plug directly or through the pressing body, and the position of the ring concentrically provided below the seat does not deviate, and the ring is pushed up or pushed down. The angle at which the gas pressure adjusting plug is pressed can be kept constant (claim 4).

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the chair (1) according to the first embodiment includes a seat (3) and a plurality of leg rods (4). The leg rod (4) has one end fixed to the lower end of the cylinder (6a) of the gas spring (6) which constitutes the height adjusting device H according to the present invention, and is radially arranged, and the other end has casters ( 5) is attached.

The height adjusting device H includes, as shown in FIG.
A hollow mounting frame (7) is provided, and a seat support (9) for supporting the seat (3) is mounted on the upper part thereof via a bolt (8). Boss portions (10) are appropriately provided at equal intervals inside the mounting frame (7), and bolts (11) are attached to the boss portions (10).
The upper wall (12) is attached via.

At the bottom of the mounting frame (7), there is a gas pressure adjusting stud (13).
Rod (6b) of the gas spring (6) with the upper side
The upper part is inserted and supported. The gas spring (6) is composed of a cylinder (6a) and a piston rod (6b) and is conventionally used, and has a gas pressure adjusting plug (13).
The piston rod (6b) can be moved by operating an opening / closing valve (not shown) in the gas spring (6).

A disk (14) is placed above the gas adjusting stopper (13) via a pressing body (15). Gas pressure adjusting stud
The lower surface, which is the spherical surface (16) of the pressing body (15), is in contact with the upper surface of (13), and the spindle (17) projects upward from the center of the upper surface of the pressing body (15). ing. The support shaft (17) is screwed through a through hole (18) formed in the central portion of the disk (14), and is inserted into a holding hole (19) formed in the upper wall (12) of the mounting frame (7). It is freely tilted. Since the closing spring force of the on-off valve acts on the gas pressure adjusting plug (13), this spring force is transmitted to the disk (14) via the pressing body (15), As a result, the upper surface of the disk (14) is attached to the upper wall (1
It comes into contact with the lower surface of 2). The disc (14) may be brought into direct contact with the upper surface of the gas pressure adjusting plug (13) without the pressing body (15).

The inner ends of a plurality of operating rods (20) are fixed to the peripheral end of the disk (14), and the operating rods (20) are attached to the mounting frame (7).
Protruding from a plurality of window holes (22) formed around the side wall (21) of the vehicle, and its outer end is fixed to a ring (23) concentric with the gas spring (6) below the seat (3). ing.

Next, the operation will be described. When the user sitting on the chair (1) wants to adjust the seat position, the disc (14) is required if he or she grabs any part of the ring (23) below the seat (3) and pushes it up or down. Angle tilt, pressing body (1
5) The upper surface of the gas pressure adjusting stud (13) is pressed by the spherical surface (16) on the lower surface, whereby the gas spring (6) is actuated and the piston rod (6b) becomes movable, so that the mounting frame
The seat (3) also moves accordingly via (7). that time,
The support shaft (17) has a holding hole (1
Since it is freely tiltedly inserted in 9), the pressing body (15) does not move laterally and come off from the upper surface of the gas pressure adjusting stud (13).

When the seat position reaches a desired position, when the user releases the ring (23), the gas pressure adjusting plug (13) is returned to its original position by the action of the closing spring. Returning, the operation of the gas spring (6) stops, the movement of the piston rod (6b) also stops, and the seat (3) also stops accordingly. And the upper surface of the disk (14) is the upper wall (12) of the mounting frame (7).
Abut the lower surface of.

As described above, in the chair height adjusting device H of the present embodiment, even if the chair (1) is rotated or seated on the seat (3), the chair by the gas spring (6) is used. (1)
Since the height of the seat (3) can be easily adjusted, and the pressing body (15) does not move to the side and come off the upper surface of the gas pressure adjusting plug (13). There are few breakdowns.

Next, a second embodiment of the present invention will be described with reference to FIG. The height adjusting device H of the second embodiment is a mounting frame.
The upper part of the piston rod (6b) of the gas spring (6) is fitted and supported in the support cylinder (24) provided in (7), and the pressing body (24) is mounted on the upper surface of the gas pressure adjusting stud (13). The support cylinder (25) can be raised and lowered freely, and the upper surface of the pressing body (24), which is the spherical surface (26), is projected from the upper end opening of the support cylinder (25) and brought into contact with the lower surface of the disk (14). Differences from the first embodiment are similar to the first embodiment in other points.

Further, in this second embodiment, a protruding piece (27) is provided so as to project upward due to an appropriate place on the upper surface of the disk (14), and the protruding piece (27) is located above the mounting frame (7). The wall (12) is loosely inserted into a holding hole (28) formed corresponding to the protruding piece (27). This Protrusion (27)
Has the same function as the support shaft (19) of the first embodiment. A spring member (29) may be provided between the lower surface of the pressing body (24) and the upper surface of the gas spring (6).

Next, the operation will be described. As in the case of the first embodiment, when the user sitting on the chair (1) wants to adjust the seat position, he / she manually grips an arbitrary part of the ring (23) below the seat (3) and pushes it up (direction A). Or when it is pushed down (direction B), the disc (14) is tilted by a required angle, and the spherical surface (26) of the upper surface of the pressing body (24) that is in contact with the lower surface of the disc (14) is pushed down, so that the pressing body (24) is It descends in the support cylinder (25) and the axial center X of the gas pressure adjusting stud (13) is pushed vertically against the spring member (29). As a result, the gas spring (6) is actuated, the piston rod (6b) is movable, and the seat (3) is also moved via the mounting frame (7).

At this time, the protruding piece (27) is attached to the upper wall (1
Since it is loosely inserted in the holding hole (28) that is bored corresponding to the projecting piece (27) in 2), the lower surface of the central part of the disk (14) is always used for gas pressure adjustment via the pressing body (24). The ring (23) can be properly brought into contact with the tap plug (13), and the position of the ring (23) provided concentrically below the seat (3) does not deviate, and the ring (23) is pushed up or pushed down. The angle at which the gas pressure adjusting stud (13) is pressed can be kept constant.

When the user releases the ring (23) when the seat is in the desired position, the spring member (29) is released.
The pressing body (24) rises in the support cylinder (25) by the action of, and the gas pressure adjusting stud (13) returns to its original position by the action of the closing spring, and the operation of the gas spring (6) is stopped. The piston rod (6b) also stops moving, and the seat (3) also stops accordingly. And the upper surface of the disk (14) is the mounting frame (7)
It contacts the lower surface of the upper wall (12).

Thus, the height adjusting device H of the second embodiment
In that case, the tilted disk (14) is the gas pressure adjusting plug (13).
Since the ring (23) can be pushed up or down and the gas pressure adjusting stud (13) can be pressed at a constant angle at all times, there is less failure.

Although the embodiments have been described above with reference to the drawings, the specific configuration is not limited to the embodiments, and modifications and additions within the scope of the invention are included in the invention. Be done.

For example, in the embodiment, the height adjusting device is used for a chair, but the present invention is not limited to this and may be used for other furniture such as a table.

[0031]

As described above, the following effects can be obtained in the present invention. (a) In the invention according to claim 1, a plurality of window holes are formed around the side wall of the hollow mounting frame for supporting the seat of the chair, and the gas pressure adjusting projection is provided in the mounting frame. While fitting and supporting the upper part of the gas spring with the plug as the upper side, the upper surface of the disk placed on the upper surface of the gas pressure adjusting projection plug is brought into contact with the lower surface of the upper wall in the mounting frame,
Since the outer ends of the plurality of operating rods having the inner end fixed to the disk peripheral end are projected from the window hole and fixed to the ring concentric with the gas spring below the seat, even if the chair or the like rotates, Also, even if you are sitting on the seat, when you grab any part of the ring under the seat by hand and push it up or down,
Since the upper surface of the gas pressure adjusting plug is pressed by the disc inclined at the required angle, the height of the seat of the chair or the like can be easily finely adjusted by the gas spring.

(B) In the invention as claimed in claim 2, the support shaft projecting upward from the central portion of the upper surface of the pressing body, in which the spherical lower surface is in contact with the upper surface of the gas pressure adjusting stud, is provided with a disk. The upper surface of the gas pressure adjusting stud is pressed by the spherical pressing body because it penetrates through the through hole formed in the center and is tiltably inserted into the holding hole formed in the upper wall of the mounting frame. Moreover, since the pressing body does not move to the side and come off from the upper surface of the gas pressure adjusting spigot, it is possible to obtain a height adjusting device for a chair or the like with few failures.

(C) In the invention according to claim 3, the upper portion of the gas spring is fitted and supported by the support cylinder provided in the mounting frame, and is placed on the upper surface of the gas pressure adjusting stud. In order to make the spherical upper surface of the pressing body that can move up and down inside the support cylinder protrude from the upper end opening of the support cylinder and contact the lower surface of the disk, the pressing body moves the axis of the gas pressure adjusting plug in the vertical direction. Since the disc that is pushed down and tilted does not directly pry the gas pressure adjusting stud, it is possible to obtain a height adjusting device for a chair or the like with few malfunctions.

(D) In the invention as claimed in claim 4, a projecting piece projecting upward from a proper place on the upper surface of the disk is provided in a holding hole formed in the upper wall of the mounting frame in correspondence with the projecting piece. Since the disk is loosely inserted, the lower surface of the central portion of the disk can always be properly brought into contact with the gas pressure adjusting stopper plug directly or through the pressing body, and the position of the ring concentrically provided below the seat or the like is displaced. Since the angle at which the ring for pushing up or pushing down the gas pressure adjusting stud is pressed can be made constant at all times, a height adjusting device for a chair or the like with few failures can be obtained.

[Brief description of drawings]

FIG. 1 is an overall view of a chair according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of a height adjusting device according to a first embodiment of the present invention.

FIG. 3 is a sectional view of an essential part of a height adjusting device according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a conventional chair height adjusting device.

[Explanation of symbols]

(1) Chair (3) Seat (4) Leg rod (5) Caster (6) Gas spring (6a) Cylinder (6b) Piston rod (7) Mounting frame (8) Bolt (9) Seat support (10) Boss Part (11) Bolt (12) Upper wall (13) Gas pressure adjusting stud (14) Disk (15) Pressing body (16) Pressing body (17) Lower surface spherical surface (17) Spindle (18) Through hole ( 19) Holding hole (20) Operating rod (21) Side wall of mounting frame (22) Window hole (23) Ring (24) Pressing body (25) Support cylinder (26) Pressing body (26) Spherical surface of top surface (27) Projection One piece (28) Holding hole (29) Spring member

Claims (4)

[Scope of utility model registration request] 1. An upper part of a gas spring having a plurality of window holes perforated around a side wall of a hollow mounting frame for supporting a seat of a chair and the like and having a gas pressure adjusting stud upward. A plurality of operating rods in which the upper end of the disk mounted on the upper surface of the gas pressure adjusting stopper is brought into contact with the lower surface of the upper wall of the mounting frame, and the inner end is fixed to the peripheral edge of the disk. A height adjusting device for a chair or the like, characterized in that an outer end portion of the above is projected from the window hole, and the outer end portion is fixed to a ring provided concentrically with the gas spring. 2. A support shaft projecting upward from a central portion of an upper surface of a pressing body, which abuts a spherical lower surface on an upper surface of a gas pressure adjusting stopper, penetrates a through hole formed in a central portion of the disk. The height adjusting device for a chair or the like according to claim 1, wherein the height adjusting device is tiltably inserted into a holding hole formed in an upper wall of the mounting frame. 3. A spherical surface of a pressing body which fits and supports an upper portion of a gas spring in a support cylinder provided in a mounting frame and which is placed on an upper surface of a gas pressure adjusting stud so that the inside of the support cylinder can freely move up and down. 2. The height adjusting device for a chair or the like according to claim 1, wherein the upper surface of the chair is projected from the upper end opening of the support cylinder so as to be in contact with the lower surface of the disk. 4. A projection piece projecting upward from a proper place on the upper surface of the disk is loosely inserted into a holding hole formed in the upper wall of the mounting frame so as to correspond to the projection piece. 1 or 3
Height adjustment device for the chairs etc. mentioned.