JPH069536U - Height adjustment device for chairs, etc. - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a height adjusting device for a chair or the like with few malfunctions without directly twisting a push valve body that functions as a gas pressure adjusting stopper of a gas spring. [Structure] When pushing down an arbitrary portion of the ring 21 with a foot or the like so as to incline at a required angle, the disk 12 and the pressing body 14 penetrating the support shaft 15 into the disk 12 are tilted to form a spherical surface 13 of the pressing body 14. Since the lower surface of the gas pressure adjusting plug 9 is directly pressed by the upper surface, the gas pressure adjusting plug 9 is not strongly twisted, and the support shaft 15 can be tilted to the bottom wall 10 of the mounting frame 6. Since the disk 12 and the pressing body 14 are laterally moved on the bottom wall 10 of the mounting frame 6 because they are loosely inserted into the mounting frame 6, the disk 12 and the pressing body 14 do not come off from the upper surface of the gas pressure adjusting stud 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a height adjusting device such as a chair using a gas spring.

[0002]

[Prior 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 metal fitting (103) attached to a support (102) from a leg portion (101) of a chair, and a spherical seat (104) is provided above it. Attach the ring body (108) concentrically to the chair main shaft via the ring receiver (107) to the ring receiver attachment body (106) having the concave surface seat (105) into which the spherical seat (104) is fitted, and Above the seat (105) and approximately concentrically therewith, a ring-shaped recessed seat (112) is formed to receive the push pin (111) of the push valve body (110) of the chair seat plate lifting gas spring (109). A chair having a structure provided on the receiving mount (106) is shown. This is because when the ring body (108) is tilted at the required angle, the lower spherical surface of the push pin (111) of the push valve body (110) moves upward along the inner surface of the concave seat (112). Then, the push valve body (110) is pushed up, and the gas spring (109) is operated to raise and lower the seat plate.

[0004]

[Problems to be solved by the device]

 However, in the above conventional technique, when the ring body (108) is tilted at a required angle, the lower end spherical surface of the push pin (111) of the push valve body (110) runs along the inner surface of the concave seat (112). And the push valve body (110) is pushed upward to move the gas spring (109) to move the seat plate up and down. This is because the inner surface of the recessed seat (112) of the ring receiving mount (106) strongly twists the push pin (111) and pushes up the push valve body (110) with its force. There is a problem that 111) is easily damaged, which may cause a failure of the device.

The present invention has been made in view of the above problems, and can be applied to a chair or the like with few malfunctions without directly pushing the push valve body that functions as a gas pressure adjusting stud for gas springs. An object is to provide a height adjusting device.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, in the invention according to claim 1, a plurality of window holes are formed around the side wall of the mounting frame in which the leg rods are radially arranged at the lower end of the leg of a chair or the like. Inside this mounting frame, the lower part of the gas spring with the gas pressure adjusting stopper plug below is fitted and supported, and the lower surface of the gas pressure adjusting stopper plug is in contact with the spherical upper surface. The support shaft that is hung from the bottom of the mounting frame is passed through a through hole that is drilled in the center of the disk that is placed on the top surface of the bottom wall of the mounting frame, and is free to tilt in the holding hole that is drilled in the bottom wall of the mounting frame. It is characterized in that the outer ends of a plurality of operating rods each having an inner end fixed to the disk peripheral end are projected from the window hole and fixed to a ring provided concentrically with the gas spring.

In order to solve the same problem, in the invention according to claim 2, a plurality of window holes are formed around the side wall of the mounting frame in which the leg rods are radially arranged at the lower end of the leg of the chair or the like. The lower part of the gas spring, with the gas pressure adjusting stopper plug facing downward, is fitted and supported in the support cylinder provided in this mounting frame, and the spherical surface is placed on the upper surface of the disk placed on the upper surface of the bottom wall in the mounting frame. The upper part of the pressing body that abuts the lower surface is fitted into the supporting cylinder through the lower end opening of the supporting cylinder so that it can move up and down, and the upper surface of the pressing body abuts the lower surface of the gas pressure adjusting tap. And

[0008]

[Action]

 According to the present invention, when pushing down an arbitrary portion of the ring with a foot or the like so as to incline it at a required angle, the disc and the pressing body penetrating the spindle into the disc are tilted, and the upper surface of the pressing body, which is a spherical surface, is tilted. Since the lower surface of the gas pressure adjusting stopper is directly pressed, the gas pressure adjusting stopper is not strongly twisted, and the support shaft is tiltably inserted into the bottom wall of the mounting frame. The disk and the pressing body do not move laterally on the bottom wall of the mounting frame and come off from the upper surface of the gas pressure adjusting stud (claim 1).

In addition, the lower part of the gas spring is inserted into and supported by the support cylinder in the mounting frame, and the pressing body in which the spherical lower surface is in contact with the upper surface of the disk placed on the upper surface of the bottom wall in the mounting frame. The upper part was inserted into the support cylinder from the lower end opening of the support cylinder so as to be able to move up and down, and the upper surface of the pressing body was brought into contact with the lower surface of the gas pressure adjusting projection plug. The vertically tilted disk does not directly push the gas pressure adjusting stud (claim 2).

[0010]

【Example】

 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the chair (1) according to the first embodiment includes a seat (3), a gas spring (4), legs (5), a mounting frame (6), and a rod (7). . The leg (5) is composed of an upper leg (5a) and a lower leg (5b), the upper leg (5a) and the lower leg (5b) are movable relative to each other, and the upper end of the upper leg (5a) is It is fixed to the bottom of the seat (3). An attachment frame (6) is provided at the lower end of the lower leg (5b), and four leg rods (7) are radially arranged on the attachment frame (6). A caster (8) is attached to the tip of 7).

The gas spring (4) constituting the height adjusting device H is provided in the leg (5), the upper part thereof is attached to the lower part of the seat (3), and the lower part thereof is provided in the mounting frame (6). It is fitted and supported with the gas pressure adjusting stopper (9) facing downward. The gas spring (4) has been conventionally used normally, and is operated by operating an opening / closing valve (not shown) in the gas spring (4) by a gas pressure adjusting plug (9). It is possible.

A bottom wall (10) is attached to the bottom surface of the attachment frame (6) via bolts (11), and a disc (12) is placed on the top surface of the bottom wall (10). The lower surface of the gas pressure adjusting plug (9) is provided with a pressing body (14) with which the upper surface formed as a spherical surface (13) abuts. The pressing body (14) is supported downward from the center of the lower surface. The shaft (15) is protruding. The support shaft (15) is screwed through a through hole (16) formed in the center of the disk (12), and a holding hole (17) is formed in the bottom wall (10) of the mounting frame (6). It is freely tilted. And since the closing spring force of the on-off valve acts on the gas pressure adjusting plug (9), this spring force is transmitted to the disk (12) via the pressing body (14), As a result, the lower surface of the disk (12) comes into contact with the upper surface of the bottom wall (10) of the mounting frame (6).

Inner ends of a plurality of operating rods (18) are fixed to the peripheral end of the disk (12), and the operating rods (18) surround the side wall (19) of the mounting frame (6). A plurality of window holes (20) are provided so as to project, and an outer end portion thereof is fixed to a ring (21) provided concentrically with the gas spring (4).

Next, the operation will be described. When the user sitting on the chair (1) wants to adjust the seat position, he pushes down any part of the ring (21) with his foot or the like, and the disc (12) tilts at a required angle, and the spherical surface (13) becomes the upper surface. Since the lower surface of the gas pressure adjusting stopper (9) is directly pressed by the pressing body (14), the gas pressure adjusting stopper (9) is not strongly twisted and the gas spring (4) operates. The seat (3) can then be moved.

At that time, the support shaft (15) is screwed through a through hole (16) formed in the central portion of the disk (12), and is held in the lower wall (10) of the mounting frame (5). Since the disk (12) and the pressing body (14) are laterally inserted freely into the hole (17), the disk (12) and the pressing body (14) move laterally on the bottom wall of the mounting frame (6) and the gas pressure adjusting stud (9 ) Does not come off from the upper surface.

When the seat position reaches a desired position, when the user releases his / her foot from the ring (21), the gas pressure adjusting plug (9) is returned to its original position by the closing spring of the opening / closing valve. The gas spring (6) stops operating, the seat (3) stops moving, and the upper surface of the disk (12) is aligned with the upper surface of the bottom wall (10) of the mounting frame (6). Abut.

As described above, in the chair height adjusting apparatus H of the present embodiment, the lower surface of the gas pressure adjusting plug (9) is directly pressed by the pressing body (14) having the spherical surface (13) as the upper surface. Since it is operated, the gas pressure adjusting stopper plug (9) is not strongly twisted, and the support shaft (15) is screwed into the through hole (16) drilled in the central part of the disk (12). Since the holding hole (17) penetrating through the lower wall (10) of the mounting frame (5) is tiltably inserted, the disk (12) and the pressing body (14) are attached to the mounting frame (6). Since it does not move laterally on the bottom wall and does not come off from the upper surface of the gas pressure adjusting stud (9), the number of failures is reduced.

Next, a second embodiment of the present invention will be described with reference to FIG. In the height adjusting device H of the second embodiment, a support cylinder (22) is provided in the mounting frame (6), and a gas pressure adjusting stud (9) is provided on the bottom of the support cylinder (22). The lower part of the gas spring (4) is inserted and supported.

The upper part of the pressing body (23) is fitted in the support cylinder (22) through the lower end opening of the support cylinder (22) so as to be able to move up and down, and the upper surface thereof is on the lower surface of the gas pressure adjusting stud (9). The lower surface is in contact with the upper surface of the disk (12) mounted on the upper surface of the bottom wall (10) in the mounting frame (6). Moreover, a spring member (25) may be provided between the upper surface of the pressing body (23) and the lower surface of the gas spring (4). The other structure is substantially the same as that of the first embodiment.

Next, the operation will be described. Similar to the first embodiment, when the user sitting on the chair (1) wants to adjust the seat position, he or she pushes down an arbitrary part of the ring (21) below the seat (3) with his / her foot etc. (12) tilts at the required angle, the spherical surface (24) of the pressing body (23) that is in contact with the upper surface of the disk (12) is pushed up, and the pressing body (23) rises in the support cylinder (22), Since the axial center X of the gas pressure adjusting plug (9) is pushed vertically against the spring member (25), the tilted disk (12) directly pryes the gas pressure adjusting plug (9). There is no such thing.

Then, when the seat position reaches a desired position, when the user removes his / her foot from the ring (21), the gas pressure adjusting plug (9) is returned to the original position by the closing spring of the opening / closing valve. When the gas spring (6) is stopped and the seat (3) stops moving, the pressing body (24) is lowered by the spring member (25) in the support cylinder (22). The upper surface of the disk (12) contacts the upper surface of the bottom wall (10) of the mounting frame (6).

As described above, in the height adjusting device H of the second embodiment, since the tilted disk (12) does not directly pry the gas pressure adjusting plug (9), there are few failures. A chair height adjustment device is obtained.

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

[0025]

[Effect of device]

 As described above, the present invention has the following effects. (a) In the invention according to claim 1, a plurality of window holes are formed around the side wall of the mounting frame on the lower end of the leg of the chair or the like in which the leg rods are radially arranged. In addition, the lower part of the gas spring with the gas pressure adjusting plug down is inserted and supported, and the lower surface of the gas pressure adjusting plug is hung from the center of the lower surface of the pressing body that abuts the spherical upper surface. Insert the supporting shaft into a through hole formed in the center of the disk placed on the upper surface of the bottom wall in the mounting frame, and freely tiltably insert it into the holding hole formed in the bottom wall of the mounting frame. Since the outer ends of the operating rods, whose inner ends are fixed to the disk periphery, are projected from the window holes and fixed to the ring that is concentric with the gas spring, tilt any angle of the ring with your foot, etc. When pushing down like this, the disk and the pressing body that penetrates the support shaft into this disk tilt and become the spherical surface of the pressing body. Since the lower surface of the gas pressure adjusting plug is directly pressed, the gas pressure adjusting plug is not strongly twisted, and the disk and pressing body move laterally on the bottom wall of the mounting frame. Since it does not come off from the upper surface of the gas pressure adjusting tap, it is possible to obtain a height adjusting device for chairs and the like with few failures.

(B) In the invention according to claim 2, a plurality of window holes are formed around the side wall of the mounting frame in which the leg rods are radially arranged at the lower end of the leg of the chair or the like. The lower part of the gas spring with the gas pressure adjusting plug down is inserted and supported in the support cylinder provided in the mounting frame, and the spherical upper surface of the disk placed on the upper surface of the bottom wall in the mounting frame. Since the upper part of the pressing body that abuts on the upper part of the pressing body is fitted into the supporting cylinder through the lower end opening of the supporting cylinder so that the upper surface of the pressing body contacts the lower surface of the gas pressure adjusting tap, the pressing body adjusts the gas pressure. Since the axial center of the plug is pushed down vertically and the tilted disc does not directly push the gas pressure plug, a height adjustment device for chairs and 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) Gas spring (5) Leg (5a) Upper leg (5b) Lower leg (6) Mounting frame (7) Leg rod (8) Caster (9) Gas pressure adjusting stud (10) Bottom wall (11) Bolt (12) Disk (13) Spherical surface (14) Pressing body (15) Spindle (16) Through hole (17) Holding hole (18) Operating rod (19) Side wall (20) Window Hole (21) Ring (22) Support tube (23) Pressing body (24) Spherical surface (25) Spring member

Claims (2)

[Scope of utility model registration request] 1. A plurality of window holes are formed around a side wall of a mounting frame in which leg rods are radially arranged at a lower end of a leg of a chair or the like, and a gas pressure adjusting stopper is provided in the mounting frame. While supporting the lower part of the lower gas spring by inserting and supporting the lower side of the gas pressure adjusting stud, the support shaft hung vertically from the center of the lower surface of the pressing body that abuts the lower surface of the gas pressure adjusting plug is attached to the bottom of the mounting frame. A plurality of holes, which are placed on the upper surface of the wall, are inserted through a through hole formed in the center of the disk and tiltably inserted into a holding hole formed in the bottom wall of the mounting frame. A height adjusting device for a chair or the like, characterized in that an outer end portion of the operating rod is protruded from the window hole and fixed to a ring concentric with the gas spring. 2. A plurality of window holes are formed around the side wall of a mounting frame in which leg rods are radially arranged at the lower end of a leg of a chair or the like, and a gas pressure is applied to a support cylinder provided in the mounting frame. The lower part of the gas spring, with the adjusting plug down, is fitted and supported, and the upper surface of the disk placed on the upper surface of the bottom wall inside the mounting frame is in contact with the spherical lower surface. A height adjusting device for a chair or the like, characterized in that the upper surface of the pressing body is fitted into the support cylinder so as to be able to move up and down through the opening, and the upper surface of the pressing body is brought into contact with the lower surface of the gas pressure adjusting plug.