JPS63103357U

JPS63103357U -

Info

Publication number: JPS63103357U
Application number: JP19791386U
Authority: JP
Priority date: 1986-12-23
Filing date: 1986-12-23
Publication date: 1988-07-05
Also published as: JPH0354612Y2

Description

[Brief explanation of drawings]

図面は本考案の一実施例を示すもので、第１図
は要部の横断面図、第２図は同要部の外側面図、
第３図は第２図の―線に沿う縦断面図、第４
図は一部分解した斜視図である。２…背凭れ、２１…左右の背支柱、３５…背芯
材、３６…ナツト部材、３８…背固定金具、３９
…頭部（駒状座金）、３９ａ…傾斜面、４０…皿
頭ねじ、４１…凹部、４２…小径ねじ孔、４３…
止めねじ。 The drawings show one embodiment of the present invention; FIG. 1 is a cross-sectional view of the main part, FIG. 2 is an external view of the main part,
Figure 3 is a vertical sectional view taken along the - line in Figure 2;
The figure is a partially exploded perspective view. 2... Backrest, 21... Left and right back supports, 35... Back core material, 36... Nut member, 38... Back fixing metal fittings, 39
...head (piece-shaped washer), 39a...slanted surface, 40...countersunk screw, 41...recess, 42...small diameter screw hole, 43...
Set screw.

Claims

[Scope of Claim for Utility Model Registration] (1) In a backrest mounting structure in which a backrest is attached to and supported by the left and right back supports of a chair, nut members are embedded in multiple locations above and below the left and right sides of the backrest, respectively. The back fixing fittings each having a head having an inwardly inclined surface on the outer periphery are screwed into these nut members from the outside, and the heads of the back fixing fittings are individually accommodated. recesses are formed at multiple locations above and below the inner surfaces of the left and right back struts, and small diameter screw holes are formed by penetrating from within each of the recesses to the back side of the back struts, and Attach the back support to the left and right sides of the backrest in a state where the head of each of the back fixing metal fittings is accommodated, and in this state insert a set screw into each small diameter screw hole from the back side of the back support so that the tip of the set screw is inserted into the recess. This chair back mounting structure is characterized in that the back rest is attracted to, connected to, and fixed to the left and right back supports by screwing the inner back fixing fitting until it strongly contacts the inclined surface of the outer periphery of the head. (2) The back fixing bracket has a V shape with an inclined surface on the outer periphery.
Request for registration of a utility model characterized by a structure consisting of a piece-shaped washer with a groove, and a countersunk screw that penetrates the piece-shaped washer and can be screwed into a nut member embedded in the left and right sides of a backrest. A backrest mounting structure for a chair according to item 1.