JPH0141310Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an extension/contraction adjustment device for the lower end of a support leg of a chair, desk, etc.

In other words, a screw-type adjuster is attached to the lower end of the support leg of a chair, desk, etc., so that the length of the support leg and the posture of the chair, etc. can be adjusted. It can be assembled well to prevent the adjuster from falling off due to rotation, and is easy to manufacture and assemble. The purpose of this document is to provide the following information so that it can be carried out suitably.

Next, the embodiment shown in the drawings will be described.

The four supporting legs 1 of the chair A and the four supporting legs 1 of the desk B are each formed of round pipes whose lower ends are open.

A support 3 having a screw hole 2 passing through the center is fitted to the lower end of each pipe support leg 1, and a flange having the same outer diameter as the support leg 1 is attached to the lower end of the support 3. 3a, and a long fitting part 3b which has a smaller diameter than the flange part 3a and can be fitted into the support leg 1 has a large number of longitudinally elongated grooves 7 formed on the outer circumferential surface of the long fitting part 3b.
When the fitting part 3b is press-fitted into the support leg 1 so that it joins to the lower end surface of the support leg 1, it is fitted so as not to move vertically or rotate.The support body 3 has the required hardness and elasticity. Although it is integrally molded using a synthetic resin having a material having In addition, after fitting, the part adjacent to the groove 7 acts as a bulging part, so that when the support 3 is fitted inside the pipe support leg, it will come into close contact with the inner surface of the pipe. A strong tight fit is created.

Reference numeral 4 denotes a circular piece-shaped support that is to be in contact with the floor on the lower side of the support 3, and a long screw rod 5 that can be screwed into the screw hole 2 is integrally extended from the center of the upper surface of the support 4. However, a protrusion 6 is formed at the upper end of the threaded rod 5 by slotting it so as to project outward from the outer diameter of the threaded rod 5.

Further, FIGS. 6 to 8 show different embodiments, and in FIG. 6, the upper end of the threaded rod 5 is crimped or crushed to form a large-diameter protrusion 6, and in FIG. In FIG. 8, a large-diameter protruding body 6 consisting of a C-shaped retaining ring or an E-shaped retaining tooth is attached, and in FIG. 8, the protruding body 6 that protrudes outward is formed by welding.

Therefore, as shown in FIG. 5, the screw rod 5 is screwed into the screw hole 2 of the support 3, and
A protruding body 6 is formed at the tip of the threaded rod 5 which protrudes by the method, and the supporting body 3 is forcefully press-fitted into the supporting leg 1 as shown by arrow A until the flange 3a joins to the lower end surface of the supporting leg 1. The whole can be assembled.

In this way, adjuster stars are attached to the lower ends of the four support legs 1, and when the support body 4 is rotated,
The support body 4 can be expanded and contracted below the support leg 1 by screwing the screw rod 5, and the length of the support leg 1 and the chair A can be adjusted.
Alternatively, the posture of desk B can be adjusted. As described above, the outer peripheral surface of the support 3 fitted on the inner surface of the lower end of the support leg 1, except for the groove 7, is in close contact with the inner wall surface and is firmly fitted into the inner surface of the support leg 1, so that the adjuster cannot be operated. In that case, once the protruding body 6 engages with the upper surface of the support body 3, the support body 4 cannot be lowered any further, and the threaded rod 5 will not be engaged halfway. You can leave it without.

Furthermore, when moving desk B or chair A by dragging it, even if the support body 4 rotates and the screw rod 5 rotates, the protrusion body 6 will not engage with the upper surface of the support body 3. It becomes impossible to remove it.

In this way, the present invention press-fits a support body with a screw hole into the lower end of a pipe support leg of a chair, desk, etc. so that it does not move up and down or rotates, and makes contact with the floor below the support body. A screw rod 5 integrally extending upward from the lower end support is screwed into the screw hole of the support. Since the projecting body that projects outward is integrally installed, the length of the supporting legs and the posture of the chair, etc. can be adjusted well by attaching a screw type adjuster, and the chair, etc. can be moved by dragging it. As mentioned above, when the support is fitted to the inner surface of the lower end of the support leg, the operation of fitting it is relatively easy due to the contact between the many grooves existing on the outer peripheral surface and the other parts. It is firmly attached to the inner surface of the lower end of the leg and does not move at all.
In addition, even if the support body and screw rod rotate, the engagement of the protruding body prevents them from falling off, and it is easy to manufacture and assemble.The structure is compact and simple in appearance. It has the feature that it can be suitably implemented.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a front view of the chair, Fig. 2 is a side view thereof, Fig. 3 is a front view of the desk, Fig. 4 is a sectional view of the main parts, and Fig. 5 is a The exploded perspective view of FIG. 4 and FIGS. 6 to 8 each show different embodiments. A...chair, B...desk, 1...support leg, 2...screw hole, 3...support body, 4...support body, 5...screw rod, 6...projection body.

Claims (1)

[Scope of utility model registration request] A plurality of grooves 7 in the longitudinal direction are formed on the outer peripheral surface of the cylindrical fitting part 3b, and a screw hole 2 is provided in the center of the opening at the lower end of the pipe support leg 1 of a chair, desk, etc. A synthetic resin support 3 having a bottom plate having a flange 3a having the same outer diameter as the outer diameter of the support leg 1 is press-fitted so as not to move vertically or rotate, and the lower surface of this support is lower than the floor. A screw rod 5 that extends upward integrally with the support 4 in contact with the surface is screwed into the screw hole 2 of the support 3, and a screw rod 5 that extends upward from the support 3 is screwed into the upper end of the screw rod 5. An extension/contraction adjustment device for the lower end of a support leg of a chair, desk, etc., characterized in that it is constructed by integrally installing a protruding body 6 that protrudes outward from the outer periphery of a threaded rod.