JPH10234512A - Armrest for chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lighten an armrest for a chair and facilitate the assembly of the chain. SOLUTION: This armrest 10 is formed by connecting a lower surface 13a of an armrest member 13 to connect upper ends of a pair of front and rear armrest supports 12 to each other, disposed at an upper end part 11a of a supporting rod 11 erected on the side of a seat for a chair, and an upper surface 11b of the upper end part of the supporting rod with an intermediate wall 14 having a lateral width smaller than the lateral width of the supporting rod, the armrest supports and the armrest member. Thereby, the strength of the armrest member is secured so as to prevent the center part of the armrest member receiving pressure from an arm from deforming downward, the armrest can be lightened, and the chair can be assembled easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armrest of a chair, and more particularly, to an armrest of a chair provided with a front-rear-direction armrest member at an upper end of a support rod standing on a side of a chair seat.

[0002]

2. Description of the Related Art Conventionally, an armrest for this type of armrest has
It has a width in the left-right direction such that the elbow does not come off, and a thickness in the up-down direction such that the elbow is not deformed when pressed by the elbow.

[0003]

However, the conventional armrest has the following problems because the thickness of the armrest member in the vertical direction is large. The entire armrest is heavy and difficult to handle when assembling the chair. When the armrest is a resin molded product, the molding time is long, requires a lot of materials, and causes an increase in cost. Further, sink marks and the like occur, which impairs the appearance of the armrest. The term “sink” refers to “dents” generated on the surface of a molded product due to a difference in volume shrinkage when a resin filled in cavitation of a mold is cooled unevenly.

[0004] The present invention solves the above-mentioned problems, and is light-weight,
Moreover, it aims at providing an armrest excellent in appearance.

[0005]

According to the present invention, the above-mentioned problem is solved as follows. (1) The lower surface of an armrest member connecting the upper ends of a pair of front and rear elbowrest support portions provided at the upper end of a support rod standing upright on the side of a chair seat, and the upper surface of the upper end of the support rod. Are connected by an intermediate wall whose width in the left-right direction is smaller than the width in the left-right direction of the support rod, the elbow support portion, and the elbow support member, and
The problem is solved by an armrest in which the armrest support, the armrest member, and the intermediate wall are integrally formed.

(2) In the above item (1), the problem can be solved by an armrest in which the support rod, the armrest support portion, the armrest member, and the intermediate wall are integrally formed.

(3) In the above item (1) or (2),
The problem is solved by an armrest in which the upper end of the support rod and the armrest member protrude in the front-rear direction of the support rod and are formed substantially in a T-shape in side view.

(4) In the above item (3), the upper end of the support rod is formed substantially in the shape of a letter Y, and an elbow rest member is disposed substantially horizontally at the upper end of the support rod. The problem is solved by armrests in which the vertical thickness of the character-shaped horizontal portion is increased from the front and rear ends of the horizontal portion toward the support rod.

(5) In the above item (3) or (4),
The problem is solved by an armrest in which the projecting length of the upper end portion of the support rod and the elbow support member behind the support rod is longer than the projecting length of the upper end portion of the support rod and the elbow support member forward of the support rod.

[0010]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. Chair (1) is a caster
(2) A seat (6) provided at the upper end of a supporting rod (4) erected at the center of the attached leg (3) via a supporting base (5), and extends rearward and upward from the supporting base (5). A back body (8) with an outgoing backrest (7) and a seat (6)
And a pair of armrests (10) arranged on both sides of the armrest.

The armrest (10) is a resin molded product, as shown in FIG.
As shown in FIG. 3, a support rod (11) arranged on the side of the seat (6) of the chair (1) and rising from the support base (5);
A pair of front and rear elbow rests (12) (1
2), an elbow support member (13) for connecting the upper ends of the pair of elbow support portions (12) in the front-rear direction, an upper surface (11b) of the upper end of the support rod (11) and the elbow support. And an intermediate wall (14) connecting the lower surface (13a) of the member (13).

The armrest support portion (12), the armrest member (13) and the intermediate wall (14) are integrally formed, and are formed integrally with the upper end (1) of the support rod (11).
1a) is fixed by an adhesive, welding, or another fixing method. In this way, when a part of the armrest (10) is integrated, the number of parts of the armrest (10) can be reduced, and the armrest can be manufactured efficiently.

As shown in FIGS. 4 and 5, the width (W1) of the intermediate wall (14) in the left-right direction is determined by the support rod (11) and the elbow support (12).
It is formed to be narrower than the width (W2) in either of the left and right directions of the armrest member 13 and the armrest member 13. Therefore, dents (15) and (15) are formed on both side surfaces of the armrest (10). This intermediate wall (1
4), the front, rear, left and right central portions of the elbow rest member (13) which receives the pressing force of the elbow do not deform downward.
The armrest (10) can be reduced in weight while ensuring the strength of (3), and the chair (1) can be easily assembled.

The support rod (11) is formed in a bifurcated shape having a flat Y-shape in a vertical direction when viewed from the side by projecting the upper end (11a) slightly obliquely upward and forward and backward. However, at the upper end (11a) of the support rod (11), the elbow rest support (12) and the intermediate wall (14)
Any shape may be used as long as the shape can be fixed. For example, it may be T-shaped.

The upper end (11a) of the support rod (11) is formed in a flat Y-shape, and the armrest (13) is disposed substantially horizontally on the upper end (11a). (10) is almost T in side view
It is formed in a character shape. The thickness (T) of the T-shaped horizontal portion in the up-down direction is determined from the front and rear ends of the horizontal portion by the support rod (11).
It becomes thicker as it approaches. For this reason, armrests (1
0) is formed in a shape balanced in strength, and even if pressing force of the elbow is applied near the front and rear ends of the elbow rest member (13),
It is hardly deformed downward and has excellent functionality.
Furthermore, the armrest (10) gives a light feeling and is excellent in design, in combination with the support rod (11) being inclined forward.

As shown in FIG. 2, the protruding length (L1) of the upper end portion (11a) of the support rod (11) and the elbow rest member (13) behind the support rod (11) is determined by the length of the support rod (11). The projection length (L2) of the upper end portion (11a) of the support rod (11) and the elbow rest member (13) more forward than 11) is longer. Therefore, the armrest (10) is long enough to receive the elbow without protruding too much forward and obstructing.

As a modification of the armrest, as shown in FIG. 6, a support rod (11), an armrest support part (12), an armrest member (13) and an intermediate wall (14) are integrally formed. There is also an armrest (20). The armrest (20) is lightweight, has sufficient strength, and can be manufactured at low cost.

[0018]

According to the first aspect of the present invention, the lower surface of the elbow rest member and the upper surface of the upper end of the support rod are formed so that the width in the left-right direction is the width of the support rod, the elbow rest support portion, and the elbow rest member. The following effects can be obtained because they are connected by an intermediate wall narrower than the width of. The strength of the armrest member can be secured so that the front, rear, left, and right central portions of the armrest member receiving the pressing force of the elbow do not deform downward, and the armrest can be reduced in weight. The chair can be easily assembled by reducing the weight of the armrest. When the armrest is a resin molded product, the armrest member, the armrest support portion, and the intermediate wall are each made to have a substantially uniform thickness, and the molding time is reduced,
The material used can be reduced. Further, the armrest can be made inexpensive to prevent the occurrence of “sink” or the like. Further, since the armrest support portion, the armrest member and the intermediate wall are formed integrally with each other, the number of parts of the armrest is small, and the armrest can be manufactured efficiently.

If the support rod, the armrest support, the armrest member, and the intermediate wall are integrally formed of, for example, a synthetic resin as described above, sufficient strength of the armrest can be obtained and the component can be manufactured. It is possible to obtain a lightweight and inexpensive armrest.

According to a third aspect of the present invention, when the upper end portion of the support rod and the armrest member project in the front-rear direction of the support rod and are formed substantially in a T-shape in a side view, the length of the armrest in the front-rear direction can be reduced. Longer elbows can be easily received.

According to a fourth aspect of the present invention, the upper end of the support rod is formed substantially in the shape of a letter Y, and the elbow rest member is disposed substantially horizontally on the upper end of the support rod. When the thickness of the horizontal portion in the vertical direction is increased from the front and rear ends of the horizontal portion toward the support rod, the armrest can be formed in a well-balanced shape, and the elbow rests near the front and rear ends of the armrest member. Even when a pressing force is applied, an armrest excellent in strength and function that hardly deforms downward can be obtained.

According to a fifth aspect of the present invention, the projecting length of the upper end of the support rod and the elbow rest member behind the support rod is determined by the protrusion of the upper end of the support rod and the elbow rest member forward of the support rod. If it is longer than the length, the armrest can be long enough to receive the elbow without protruding too much forward and obstructing.

[Brief description of the drawings]

FIG. 1 is a side view of a chair with armrests according to an embodiment of the present invention.

FIG. 2 is an enlarged view of the armrest shown in FIG.

FIG. 3 is an exploded side view of the armrest shown in FIG. 2;

FIG. 4 is a sectional view taken along arrow 4-4 in FIG. 2;

FIG. 5 is a cross-sectional view taken along a line 5-5 in FIG. 2;

FIG. 6 is a side view of another form of an armrest.

[Explanation of symbols]

 (1) Chair (2) Caster (3) Leg (4) Support rod (5) Support base (6) Seat (7) Backrest (8) Back body (10) Armrest (11) Support rod (11a) Support rod Upper end (11b) Upper surface of support rod (12) Elbow support support (13) Elbow support member (13a) Lower surface of elbow support member (14) Intermediate wall (15) Depression (20) Armrest

Claims (5)

[Claims] 1. A lower surface of an elbow rest member for connecting upper ends of a pair of front and rear elbow rest supports provided at an upper end of a support rod standing upright on a side of a chair seat, and an upper end of the support rod. The upper surface, the width in the left-right direction is connected by an intermediate wall narrower than the width in the left-right direction of the support rod, the elbow support and the elbow support, and the elbow support and the elbow support and the intermediate wall The armrest of the chair, wherein the armrest is formed integrally. 2. The armrest of a chair according to claim 1, wherein the support rod, the armrest support part, the armrest member, and the intermediate wall are integrally formed. 3. The chair according to claim 1, wherein an upper end portion of the support rod and an armrest member project in the front-rear direction of the support rod, and are formed substantially in a T-shape in a side view. Armrest. 4. An upper end portion of the support rod is formed substantially in a Y-shape, and the elbow rest member is disposed substantially horizontally on an upper end portion of the support rod to form a T-shaped horizontal portion. The armrest of a chair according to claim 3, wherein the thickness in the vertical direction is increased from the front and rear ends of the horizontal portion toward the support rod. 5. The protruding length of the upper end of the support rod and the elbow rest member behind the support rod, and the protruding length of the upper end of the support rod and the elbow rest member forward of the support rod. The armrest of the chair according to claim 3 or 4, which is longer than the armrest.