JP4008572B2 - Chair armrest mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure for a chair armrest.
[0002]
[Prior art]
As a known example of the armrest mounting structure of a chair, there is one described in Japanese Patent Laid-Open No. 8-38299. In this chair, the strength against the load applied to the armrest is secured by attaching an aluminum die cast or an iron reinforcing member to the outer shell as a member for supporting the armrest.
[0003]
[Problems to be solved by the invention]
However, in the case of the chair described in the above publication, if the reinforcing member is made of aluminum die cast, the material cost is high, so that the manufacturing cost increases as a whole, and the iron one increases the weight of the entire chair. There is a problem. Furthermore, since the reinforcing member for attaching the armrest is screwed to the outer shell, the assembling work is complicated and the number of parts is increased.
[0004]
Moreover, in said chair, since the function as a structure which supports a load is given to an outer shell, the thickness of outer shell itself becomes thick and there exists a problem of causing the weight increase of a chair.
In addition, it is necessary to provide reinforcing ribs on the surface of the outer shell to ensure the strength required for the outer shell to function as a structure. Will be complicated and will increase costs.
[0005]
The present invention has been made in view of the above-described problems of the prior art, and is inexpensive and can reduce the weight of the chair as a whole, and is excellent in design. An object is to provide an armrest mounting structure.
[0006]
[Means for Solving the Problems]
The present invention solves the above problems as follows.
(1) a central piece with a mounting portion of the pillar in a lower portion, that this comprises a support piece of the left and right pair extending horizontally from either side of the central piece, bending the outer peripheral edge of the support piece upward Accordingly, to form a standing rim continuous at the corner between the rear edge and side edges, by providing a recess in the rear side portions of the support piece, this portion, the armrest attachment portion armrest lower end is attached, and inward portions from the armrest attachment portion before Symbol supporting pieces to form a reinforcing portion projecting upward, by the a standing edge reinforcing section, you to surround the both sides and rear of the armrest attachment portion .
[0007]
(2) In the above item (1), the reinforcing part has an arcuate part surrounding the armrest mounting part from the inside to the front .
[0008]
(3) In the above item (1) or (2), the central piece and the support piece are formed of separate members, and these are joined to form a seat mounting bracket.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a chair armrest mounting structure according to the present invention will be described with reference to the accompanying drawings.
[0010]
FIG. 1 is an exploded perspective view of a chair to which an armrest mounting structure for a chair according to the present embodiment is applied as viewed from the front upper side.
[0011]
As shown in FIG. 1, the chair includes a backrest portion (10), a seat portion (12), a leg portion (14), and the like.
[0012]
The backrest portion (10) can move up and down along a backrest rod (16) whose lower end is fixed to a seat mounting bracket, which will be described later. The backrest part (10) includes a skin material (18), a back cushion material (20), an inner shell (22), an outer shell (24), etc., and the skin material (18) and the back cushion material (20) It is attached to the shell (22) by known means. The inner shell (22) is screwed to the outer shell (24), and the backrest ridge (16) is slidably disposed between the inner shell (22) and the outer shell (24). .
[0013]
The seat portion (12) includes a seat cushion material (26), a seat inner shell (28), a seat outer shell (29), a seat mounting bracket (30), and the like. The seat cushion material (26) is stretched on the upper surface of the seat inner shell (28), and the lower surface of the seat inner shell (28) is covered with the seat outer shell (29). The seat mounting bracket (30) has a role of supporting the seat inner shell (28) and the seat outer shell (29) and receiving a load applied to the seat.
[0014]
FIG. 2 is a plan view of the seat mounting bracket (30), and FIG. 3 is a cross-sectional view taken along line III-III in FIG. As shown in FIG. 2, the seat mounting bracket (30) includes a center piece (32) and a pair of left and right support pieces (34a) and (34b) welded to the center piece (32). As shown in FIG. 3, the central piece (32) has a box shape that is U-shaped when viewed from the front, and the central box-shaped portion (32a) has a leg column (14a) of the leg portion (14). An attachment cylinder (36) to which the upper end is attached is provided.
[0015]
4 and 5 show the central piece (32) in an enlarged manner. The central piece (32) is an iron box-like portion (32a) formed by sheet metal processing or the like ( It is constructed by welding to 32b). As shown in FIG. 1, the lower end of the chair backrest (16) is attached to the box-shaped part (32a) so as to be tiltable by a pin (38) in the left-right direction.
[0016]
A through hole (40) for mounting the seat inner shell (28) is formed on the rear surface side of the center piece (32), and the seat inner shell (28) is screwed by the screw (42). It is fixed together with the outer shell (29).
[0017]
As shown in FIG.2 and FIG.3, a total of three screw holes (35) for armrest attachment are provided in the rear part of the support piece (34a) (34b), respectively. The screw hole (35) is formed by welding a nut to a hole formed in the support pieces (34a) (34b).
[0018]
On the outer peripheral edge of the seat mounting bracket (30), an upright edge (37) is formed for continuous reinforcement at the corner between the side edge and the rear edge by bending upward , and the screw hole (35) A recess (39) is formed by press molding around the periphery. In the support pieces (34a) and (34b), a reinforcing portion (41) having an arc-shaped portion surrounding the three screw holes (35) in the armrest mounting portion from the inside to the front is projected upward. Is formed .
[0019]
As shown in FIG. 1, the armrest (44) is attached and fixed to the screw hole (35) of the support piece (34a) (34b) by a set screw (46).
[0020]
When a load is applied to the armrest (44), the seat mounting bracket (30) exhibits sufficient strength to withstand the load by the recess (39) and the reinforcing portion (41). It is not necessary to make the shell (28) and the seat outer shell (29) function as structural members. As a result, it is not necessary to increase the thickness of each shell itself, and the overall weight of the chair can be reduced.
[0021]
In addition, since it is not necessary to provide reinforcing ribs on the surfaces of the seat inner shell (28) and the seat outer shell (29), the appearance of the design is improved and the structure of the mold for molding the shell can be simplified. This can reduce costs. Furthermore, since the molding time of the shell is short, manufacturing efficiency is improved.
[0022]
In addition, since it is not necessary to attach a reinforcing member or the like to the shell, the number of parts can be reduced, and the efficiency of assembling the chair and the cost can be reduced.
[0023]
In this embodiment, the central piece (32) and the support pieces (34a) (34b) are separate members, and the seat mounting bracket (30) is configured by welding each member. It is also possible to use an integrally molded punching material or the like.
[0024]
【The invention's effect】
According to the present invention, the following effects can be achieved.
(a) According to the invention of claim 1, since the seat outer shell and the seat inner shell can be thinned, the entire chair can be reduced in weight.
Further, since there is no need to provide reinforcing ribs on the shell, the design is improved, the structure of the shell molding die can be simplified, and the manufacturing cost can be reduced.
[0025]
(b) If by the invention of claim 2, the configuration which is easy tanker, it is possible to improve the strength of the support piece.
[0026]
(C) According to the invention of claim 3, since the seat mounting bracket is constituted by combining a plurality of members, an inexpensive iron member can be used, and the cost of the entire chair can be reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an embodiment of a chair according to the present invention as viewed from the front upper side.
FIG. 2 is a plan view of a seat mounting bracket.
3 is a cross-sectional view taken along line II-II in FIG.
FIG. 4 is an enlarged plan view of a center piece.
FIG. 5 is also a front view of the center piece.
[Explanation of symbols]
(10) Backrest
(12) Seat part
(14) Leg
(14a) Pillar
(16) Backrest
(18) Skin material
(20) Back cushion material
(22) Inner shell
(24) Outer shell
(26) Seat cushion material
(28) Seat inner shell
(29) Seat outer shell
(30) Seat mounting bracket
(32) Center piece
(32a) Box-shaped part
(32b) Plate part
(34a) (34b) Support piece
(35) Screw hole
(36) Mounting part
(37) Outer rim
(38) Pin
(39) Recess
(40) Through hole
(41) Reinforcement part
(42) Screw
(44) Armrest
(46) Set screw

Claims (3)

A central piece having a pedestal mounting portion at the bottom, and a pair of left and right support pieces extending horizontally from both sides of the central piece, and by bending the outer peripheral edge of the support piece upward ; to form a standing rim for continuous at the corners of the edge and the trailing edge, is provided a recess in the rear side portions of the support piece, this portion, the armrest attachment portion armrest lower end is attached, and the support A reinforcing portion that protrudes upward is formed in an inner portion of the armrest mounting portion in the piece, and both sides and the rear of the armrest mounting portion are surrounded by the reinforcing portion and the standing edge. Chair armrest mounting structure. The armrest mounting structure for a chair according to claim 1 , wherein the reinforcing portion has an arcuate portion surrounding the armrest mounting portion from the inside to the front thereof .   3. The chair armrest mounting structure according to claim 1 or 2, wherein the center piece and the support piece are formed of separate members and joined to form a seat mounting bracket.

Images