JPH10127410A - Armrest fitting structure of chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable fitting of an armrest of a chair only by a bolt with a sufficient strength without any shake after fitting. SOLUTION: A fitting member 7 is integrally fixed to a lower edge of an L-shaped bent armrest support 6 by welding, etc., and a lateral aperture 13 is formed on a lower surface of a plastic seat supporting board 1. At the outer part of the lateral aperture 13, a flat standing member is integrally formed. A side edge of the fitting member 7 is inserted into the space above the flat standing member when the lower end of the armrest support 6 is inserted into the lateral aperture 13 for positioning, then the fitting member 7 is fixed to the lower surface of the seat supporting board 1 only by a bolt 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an armrest mounting structure for an office chair or the like.

[0002]

2. Description of the Related Art Armrests in office chairs are generally prepared as optional parts so that they can be retrofitted as necessary. Usually, armrests are provided on the lower surface of a seat plate supporting plate for supporting a seat plate. It is necessary to firmly fix the lower end portion of the base plate using at least about three bolts (screw). For this reason, it took a lot of time and effort to install, but despite using three bolts, it was not always possible to obtain sufficient strength, and if the bolts were insufficiently tightened, the armrests would stick. There was also it.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an armrest mounting structure for a chair which can be easily mounted with a single bolt, has sufficient strength, and has little unevenness after mounting.

[0004]

For this purpose, the armrest mounting structure for a chair according to the present invention comprises an L-shaped bent armrest supporting column and a mounting piece integrally fixed to a lower side of the armrest by welding or the like, and a plastic seat plate. A horizontal hole is formed on the lower surface of the support board, and a horizontal standing piece is integrally formed on the lower surface of the seat plate support plate outside the horizontal hole, and the lower edge of the armrest support column is inserted into the horizontal hole. Then, one side edge of the mounting piece is inserted and positioned in the gap on the horizontal standing piece, and the mounting piece is fixed to the lower surface of the seat plate support plate with a single bolt.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a chair according to the present invention.
Is a plastic seat plate support plate supported on the support 2,
Reference numeral 3 denotes a cushion-like seat plate fixed to the upper surface of the seat plate support plate 1, 4 denotes a backrest supported by a rear portion of the seat plate support plate 1, 5
Is an armrest body horizontally supported on both sides of the seat plate support board 1 by armrest support columns 6.

The armrest support column 6 is formed by bending an iron pipe having an elliptical cross section into a substantially L shape and fixing the armrest body 5 to an upper portion thereof. As shown in FIGS. 2 to 4 in a cross-sectional view, a mounting portion of the armrest support column 6 to the lower surface of the seat plate support plate 1 is shown in a sectional view, and as shown in an exploded perspective view of FIG. Attachment piece 7 is integrally fixed at a substantially middle position on the lower side of the armrest support column 6 by welding, and the attachment piece 7 has one side edge 7a in a flat plate shape and the other side edge has a bent rib 7b for reinforcement. And a through hole 7c is opened.

The seat plate support plate 1 is formed in a dome-shaped lower surface by injection molding of plastic, and a fixing frame 9 fixed to the upper end of the column 2 is matched with a concave portion 8 formed in the center thereof. The support plate 1 is fixed on the fixing frame 9 with bolts 10 and assembled.

The lower mounting surface of the seat plate support plate 1 is recessed in a U-shape near both side edges, so that the horizontal mounting surface 1 is formed.
1 and an armrest support column 6 is provided on the back wall 12 of the mounting surface 11.
Are formed so as to be able to be inserted without any gap, and a horizontal upstanding piece 15 is formed on the side wall 14 of the mounting surface 11 so that a gap 16 is formed between the horizontal standing piece 15 and the mounting surface 11. Set up. Reference numeral 17 denotes a nut embedded in the mounting surface 11. Numeral 18 is a claw piece integrally formed on the seat plate support plate 1 to fix the nut 17 in the mounting surface 11 immovably.
The lateral hole 13 is formed not only on the inner wall 12 as shown in FIG. 3 but also on the inner wall 19 of the inner recess 8. Further, a positioning piece 20 for stopping the tip of the armrest support column 6 is formed integrally with the inner wall 19. For this reason, when the armrest support column 6 is inserted into the lateral hole 13, the armrest support column 6 is supported by the inner wall 12 and the inner wall 19, and its tip abuts against the positioning piece 20 for positioning. At the same time, one side edge 7a of the mounting piece 7 slides into the gap 16 between the horizontal rising piece 15 and the mounting surface 11 and the horizontal rising piece 1
5, the one side edge 7a is clamped to the mounting surface 11. Then, the mounting piece 7 can be fixed on the mounting surface 11 by inserting the bolt 21 into the through hole 7 c and screwing the bolt 21 to the nut 17.

[0009]

As described above, the armrest mounting structure for a chair according to the present invention is such that when the armrest supporting column is inserted into the lateral hole of the seat plate support board, the mounting piece is inserted into the gap on the horizontal standing piece and positioned. Therefore, there is an advantage that the mounting can be performed firmly without rattling after the mounting. For this reason, if the armrest is prepared as an optional part, there is a beneficial effect that it can be easily attached with one bolt as needed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a chair according to the present invention.

FIG. 2 is a longitudinal sectional view showing an armrest mounting structure for a chair according to the present invention.

FIG. 3 is an enlarged view of a main part of FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is an exploded perspective view of a lower surface of a seat plate support board of the armrest mounting structure for a chair according to the present invention.

[Description of Signs] 1 Seat support plate 5 Armrest body 6 Armrest support column 7 Mounting piece 7a One side edge 7c Through hole 11 Mounting surface 12 Back wall 13 Side hole 14 Side wall 15 Horizontal upright piece 16 Gap 17 Nut 21 Bolt

Claims (1)

[Claims] An attachment piece is integrally fixed to a lower side of an L-shaped bent armrest support column by welding or the like to form a lateral hole in a lower surface of a plastic seat plate support board, and the seat plate is formed. A horizontal standing piece is formed integrally with the outer part of the horizontal hole on the lower side of the support board,
When the lower side end of the armrest supporting column is inserted into the lateral hole, one side edge of the mounting piece is inserted and positioned in the gap on the horizontal standing piece, and the mounting piece is singly mounted on the lower surface of the seat plate support plate. The armrest mounting structure of a chair, characterized in that it is fixed with bolts.