JPH0810292Y2 - Chair leg mating structure in a freely disassembled chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a structure for fitting chair legs in a chair that can be assembled and disassembled, and in particular, disassembles quickly and easily without causing damage to components. The present invention relates to a chair leg fitting structure improved so that it can be assembled.

[Conventional technology]

As a chair leg fitting structure in a conventional chair that can be assembled and disassembled, a conical body 10 is formed on the upper end of the chair leg 1 as shown in FIGS. 1 and 2 and is provided on the seat plate side. There is one in which a conical recess 12 is formed in the fitting socket 11 and the conical body 10 is fitted into the conical recess 12 so that the conical body 12 can be quickly assembled or disassembled.

[Problems to be solved by the device]

However, in such an assembled structure, when the user sits on a chair and is loaded, the cone-shaped body 10 has a conical recessed portion.
Not only is the conical body 10 too strong and the conical recess 12 becomes difficult to disassemble because it is pushed into the interior 12 more strongly and becomes an excessively tight fitting state, which makes it difficult to disassemble.
Since it is pushed into the inside, there is a problem that a crack is generated in the opening peripheral edge of the fitting socket 11 and the fitting socket 11 is easily broken.

[Means for solving the problem]

The present invention has been made in view of the above, and in order to solve this problem, the chair leg fitting structure according to the present invention is
A pair of symmetrical horizontal arc-shaped engaging ribs on the fitting portion of the leg,
A pair of symmetrical substantially horizontal arc-shaped engaging ribs are also provided in the seat leg fitting sockets of the seat plate, and the length of each engaging rib is set to 1/4 of the circumference of the circumferential surface of the forming part. Is also formed to be substantially short, and at the time of assembly, the fitting portion of the chair leg is inserted into the fitting socket of the seat plate and then relatively rotated by 90 degrees.
The engagement rib of the chair leg and the engagement rib in the fitting socket are firmly overlapped with each other and firmly joined together, and at the time of removal, they can be easily separated by relatively rotating in opposite directions. is there.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is an overall perspective view showing the assembled state of the chair to which the embodiment according to the present invention is applied. In the figure, the backrest portion 20 is shown.
The circular protrusions 200 and 201 are provided on the upper left and right sides of the seat plate 2 so as to lean the shoulders when the user sits, and the lower ends are fitted to the extending portions formed on the left and right rear ends of the seat plate 2. There is. The cylindrical front legs 25 and 26 are fitted in the chair leg fitting sockets 21 and 22 at the front part of the seat plate, and the rear legs 27 and 28 having a conical shape inclined rearward are the sockets 23 for fitting the chair leg at the rear part of the seat plate. , 24 are fitted.

FIG. 4 is an exploded perspective view of FIG. As shown in the figure, the backrest 20 is assembled to the seat plate 2 by fitting the cylindrical members 202, 203 formed at the lower end thereof into the conical recesses 204, 205 formed in the seat plate 2. Seat plate 2
Sockets 22,22,2 for fitting four chair legs provided on the bottom of the
In the inside of 3,24, disk-shaped elastic body 210,220,230,24
Contains 0. At the upper end of each chair leg 25, 26, 27, 28, substantially horizontal arc-shaped engaging ribs extending in the circumferential direction on opposite side circumferential surfaces.
Formed 3,4.

FIG. 5 is an exploded perspective view showing in more detail a portion of a structure for assembling a chair leg and a seat plate according to the present invention. Since this structure is the same for all chair legs, in order to omit the description, the chair leg 25 and the chair leg fitting socket 21 therein will be described as an example. A small diameter portion as a fitting portion is formed at the upper end portion of the chair leg 25, and arc-shaped engaging ribs 3 and 4 extending in a substantially horizontal circumferential direction are symmetrically provided on both opposing peripheral surfaces of the small diameter portion. There is. The length of the engaging ribs 3 and 4 is smaller than 1/4 of the length of the circumference of the small diameter portion. The front ends (counterclockwise direction) of the engaging ribs 3 and 4 are respectively formed with arcuate surfaces 32 and 42 directed downward, and the semicircular protrusions 31 and 41 are respectively formed in the central portions.
And stoppers 30 and 40 extending downward are formed at the rear ends.

On the other hand, on the inner peripheral surface of the chair fitting socket 21 of the seat plate 2,
Engaging ribs 5 and 6 corresponding to the engaging ribs 3 and 4 of the chair legs are provided. That is, the engaging ribs 5 and 6 provided on the inner peripheral surface of the socket 21 have substantially the same length as the engaging ribs 3 and 4, and the arcuate surfaces 52 and 62 that are directed upward at the front end in the clockwise direction. To form
Further, semicircular concave grooves 51, 61 are provided in the central portion, and stopper portions 50, 60 rising upward are formed at the rear end.
The disk-shaped elastic body 210 is arranged at the top of the fitting socket 21.

FIG. 6 is a cross-sectional view showing a state in which the chair leg according to the present invention is assembled to the chair leg fitting socket of the seat plate. When assembling, as shown in FIG. 5, the chair leg fitting socket 25 is turned upside down, and the engaging ribs 3 and 4 and the engaging ribs 5 and 6 are positioned so that the engaging ribs 3 and 4 are in conflict with each other. Socket for mating chairs 21
Insert inside. Then, as shown in FIG. 6, the arcuate surfaces 32 and 42 of the engagement ribs 3 and 4 on the chair leg side and the engagement ribs 5 and 6 on the socket side.
The chair legs 25
By rotating 90 degrees counterclockwise about 90 degrees, the guide ribs of the arcuate surfaces 32, 42 and the arcuate surfaces 52, 62 cause engagement ribs on the chair leg side.
3, 4 and the engaging ribs 5, 6 on the socket side are smoothly moved to the position where they are vertically overlapped with each other, and are engaged in the state as shown in FIG.

FIG. 8 is a side view showing a state in which a chair leg and a socket for fitting a chair leg of a seat plate according to the present invention are joined. As shown in the drawing, the engaging rib 3 is rotated to the left, and the semi-circular protrusion 31 of the engaging rib 3 and the semi-circular groove 61 of the engaging rib 6 engage with each other, and the engaging rib 3 3 and 6 are stopper parts 6 on the other side
It is received by 0 and 30, and rotation to the left is blocked.
The action of the other engaging ribs 4 and 5 is the same.

FIG. 9 is a vertical cross-sectional view showing a state in which the chair leg seating plate according to the present invention is joined to the chair leg fitting socket. As shown in the figure, when the chair leg 25 is pushed to the bottom, the disc-shaped elastic body 21 arranged in the fitting socket 2 of the seat plate is compressed. Since the disc-shaped elastic body 21 itself has elasticity, the close contact state between the engaging ribs 3, 4 and 4, 5 is enhanced, and the semi-circular protrusions 31, 34 and the semi-circular concave grooves 51, 61 are further provided. By engaging with the chair leg 25, the chair leg fitting socket of the seat plate is surely coupled in a stable state.

[Brief description of drawings]

FIG. 1 is a perspective view showing a conventional fitting structure of a chair leg and a fitting socket of a seat plate. FIG. 2 is a vertical cross-sectional view showing a state in which those shown in FIG. 1 are assembled and joined. FIG. 3 is a perspective view showing a state in which a chair applied to the present invention is assembled. FIG. 4 is a perspective view showing a state where the chair of FIG. 3 is removed and disassembled. FIG. 5 is a perspective exploded view showing a fitting structure of a chair leg and a seat plate fitting socket according to the present invention. 6 and 7 are transverse cross-sectional views for explaining the operation of joining the chair leg and the fitting socket of FIG. 8 and 9 are a side view and a vertical sectional view showing a state in which the chair leg and the fitting socket of FIG. 5 are joined. Explanation of symbols 1,25,26,27,28 …… Chair legs 10,202,203 …… Conical body 11,21,22,23,24 …… Chair leg fitting socket 12,204,205 …… Conical recess 2 …… Seat plate, 20 …… Backrest 200,201 …… Circular protrusion 210,220,230,240 …… Disc-shaped elastic body 3,4,5,6 …… Engaging rib 30,40,50,60 …… Stopper 31,41 …… Semicircular Protrusion 51,61 …… Semi-circular groove 32,42,52,62 …… Arc surface

Claims (1)

[Scope of utility model registration request] 1. A chair which is composed by assembling a backrest portion, a seat plate portion, a chair leg, and a disk-shaped elastic body, wherein the chair leg has an upper end portion having an outer peripheral surface having a length of the outer periphery. A pair of symmetrical substantially horizontal arc-shaped engaging ribs shorter than 1/4 of each other; the engaging ribs of the chair legs are provided with a downward arcuate surface provided at the front end and a semi-circular projection provided at the center. And a stopper portion provided at a rear end and hanging downward; a pair of mutually equal lengths on an inner peripheral surface of the chair leg fitting socket provided on the seat plate, the engaging ribs of the chair leg. Provided with symmetrical horizontal arc-shaped engaging ribs; the engaging ribs of the chair fitting socket are provided with an arcuate surface which is provided at a front end and is directed upward, a semicircular concave groove provided at a center, and a rear end. And a stopper that rises upward; and a circle inside the socket for fitting the chair leg. Fitting structure 椅脚 in exploded freely chair, characterized in that it has disposed Jo elastic body.