JP2006102131A - Arm device of chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an arm device of a chair allowing the number of parts to be less and improving easiness of assembly and user-friendliness for arms. <P>SOLUTION: The arm device of the chair is provided with a rising piece 8 having a plurality of engaging holes 7 on the outer periphery of an armrest base 2 and a brim 10 extending outward from the bottom and having a recessed groove 9 on the upper face. A downward-facing piece 12 externally fitted to the rising piece 8 and protrusively provided with an engaging pawl 11 on the inner peripheral face for engaging with the engaging hole 7 is connected with the outer peripheral end of a core member 5. A surface cover member 6 covers the outer peripheral face and the lower end of the piece 12. The lower end of the cover member 6 under the piece 12 fits into the groove 9 of the brim 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention includes an elbow rest substrate and a pad member attached with a space provided on the upper surface thereof, and covers the surface of the pad member made of a hard synthetic resin that can be elastically deformed moderately. The present invention relates to an armrest device for a chair formed of a soft synthetic resin surface material.

The conventional armrest device for a chair attaches the elbow pad and the pad member to the upper surface of the boss part protruding upward from the elbow pad at four corners of the space formed inside the both. And the lower surface of the female screw portion projecting downward from the pad member, and the screw is inserted through the through hole provided in the boss portion from below the elbow pad, and is screwed into the female screw portion. (For example, see Patent Document 1 and Patent Document 2).
JP 2000-333776 A JP 2000-333777 A

However, since conventional armrest devices for chairs use screws for mounting the armrest substrate and pad member, the number of parts is large, and it takes time to assemble, and the four screw mounting portions of the pad member are pad members. There is a possibility that the elastic deformation of the armor is locally hindered and uniform elasticity cannot be obtained at the time of armresting, resulting in discomfort.
In view of the above-mentioned problems of the conventional technology, the present invention has a small number of parts, excellent assemblability, and the pad member can be elastically deformed uniformly over almost the entire area. The aim is to provide a good chair armrest device.

According to the present invention, the above problem is solved as follows.
(1) An elbow rest substrate and a pad member attached with a space provided on the upper surface thereof, a core material made of a hard synthetic resin that can be elastically deformed moderately, and a soft synthetic covering the surface of the pad member In an armrest device for a chair formed of a resin surface covering material, an upright piece having a plurality of engagement holes in the outer peripheral surface of the elbow rest substrate and extending outward from the lower end thereof, the upper surface And an edge piece having a recessed groove on the outer peripheral edge of the core member, and an engaging claw that is externally fitted to the standing piece and engages with the engaging hole on the inner peripheral surface. The pieces are continuously provided, the outer peripheral surface and the lower end portion of the downward piece are covered with the facing material, and the lower end portion of the facing material below the downward piece is fitted into the concave groove of the edge piece.

(2) In the above item (1), the downwardly facing piece of the core is formed so that the portion with the engaging claws is thick and the portion without the engaging claws is thin.

(3) In the above item (1) or (2), the engagement hole of the standing piece of the elbow pad and the engagement claw of the core member engaged therewith are rectangular in the horizontal direction.

According to the present invention, the following effects can be achieved.
(a) According to the invention described in claim 1, since it is not necessary to use a screw for mounting the elbow pad and the pad member, the number of parts can be reduced, and the assemblability is improved.
Also, local rigid parts for screw mounting such as bosses and female screw parts that hinder the elastic deformation of the pad member are eliminated at the corners of the space formed inside the elbow pad and the pad member. Therefore, the pad member can be elastically deformed uniformly over almost the entire region, and the comfort of the armrest can be improved.

(b) According to the invention of claim 2, since the downward portion of the core member is formed so that the portion with the engaging claws is thick and the portion without the engaging claws is thin, The material can be reduced and the weight can be reduced without reducing the bonding strength.

(c) According to the invention described in claim 3, since the engaging hole of the standing piece of the elbow pad and the engaging claw of the core material engaged therewith are rectangular in the horizontal direction, the elbow pad and the core Bond strength with the material can be increased.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 is a side view of the armrest device of the present embodiment, FIG. 2 is an end view taken along line II-II of FIG. 1, FIG. 3 is a perspective view of an elbow rest substrate, and FIG. 4 is a line IV-IV of FIG. FIG. 5 is a perspective view showing the core material upside down.

  An armrest device (1) for a chair according to this embodiment includes an elbow rest board (2) that is substantially rectangular in plan view and that is long in the front-rear direction, and a pad member (4) that is attached by forming a required space (3) on the upper surface thereof. The pad member (4) is formed of a hard synthetic resin core material (5) that can be appropriately elastically deformed, and a soft synthetic resin cover material (6) that covers the surface thereof. .

  On the outer periphery of the elbow pad (2), an upright piece (8) having a plurality of engagement holes (7) on the peripheral surface, and extending outward from the lower end thereof, has a concave groove (9) on the upper surface. An edge piece (10) is provided, and the outer peripheral edge of the core member (5) is fitted on the upright piece (8) and is engaged with the engagement hole (7) on the inner peripheral surface. A downward piece (12) projecting from the engaging claw (11) is connected. Then, the outer peripheral surface and the lower end of the downward piece (12) are covered with the cover material (6), and the lower end of the cover material (6) below the downward piece (12) is covered with the edge piece (10). It fits into the groove (9).

The downward piece (12) of the core member (5) is formed so that the portion with the engaging claws (11) is thick and the portion without the engaging claws (11) is thin. For this reason, it is possible to reduce the material and reduce the weight without reducing the bonding strength between the elbow rest substrate (2) and the pad member (4).
Further, the engagement hole (7) of the upright piece (8) of the elbow pad (2) and the engagement claw (11) of the core member (5) engaged therewith are formed into a rectangular shape that is long in the horizontal direction. For this reason, the joint strength between the elbow rest substrate (2) and the core material (5) can be increased.

  In the center of the rear part of the elbow rest board (2), there is provided a boss (13) that faces up and down to fit a support shaft provided at the upper end of an armrest post (not shown), and this boss (13) is the center. Radial ribs (14) are provided on the upper surface of the bottom of the elbow rest substrate (2).

  As shown in FIG. 2, the upper end of the rib (14) is normally separated from the lower surface of the core (5), but when the pad member (4) is elastically bent downward to some extent during armresting, the core It contacts the lower surface of the material (5) and prevents further downward elastic bending of the pad member (4).

  On the upper surface of the core material (5), a large number of elongated holes (15) elongated in the front-rear direction are provided in an appropriate pattern, and a soft surface material (6) is provided in each of the small holes (15). By filling, the elasticity of the core material (5) is increased without impairing the feel of the outer cover material (6).

  Since the armrest device of the present embodiment is configured as described above, it is not necessary to use screws for mounting the armrest substrate (2) and the pad member (4), the number of parts can be reduced, and assemblability is improved. To do. In addition, screw attachments such as a boss part and a female screw part that hinder the elastic deformation of the pad member (4) are provided at the corners of the space formed inside the elbow pad (2) and the pad member (4). Therefore, the local rigid body portion can be eliminated, so that the pad member (4) can be elastically deformed uniformly over almost the entire region.

It is a side view of the armrest device of one embodiment of the present invention. FIG. 2 is an end view taken along line II-II in FIG. 1. It is a perspective view of an elbow pad. FIG. 4 is an end view taken along line IV-IV in FIG. 3. It is a perspective view which shows a core material upside down.

Explanation of symbols

(1) Armrest device
(2) Elbow pad
(3) Space
(4) Pad material
(5) Core material
(6) Surface material
(7) Engagement hole
(8) Standing piece
(9) Groove
(10) Edge piece
(11) Engaging claw
(12) Downward piece
(13) Boss
(14) Rib
(15) Small hole

Claims (3)

  An elbow rest substrate and a pad member attached with a space provided on the upper surface thereof, the pad member being made of a hard synthetic resin core material that can be elastically deformed moderately, and a soft synthetic resin covering the surface thereof In an armrest device for a chair formed by a surface covering material, an upright piece having a plurality of engagement holes on a peripheral surface and an outwardly extending from a lower end thereof on an outer peripheral portion of the elbow pad, and a concave groove on an upper surface And a downwardly facing piece having an engaging claw protruding from the inner peripheral surface and engaging with the engaging hole on the outer peripheral edge of the core member. The chair is characterized in that an outer peripheral surface and a lower end portion of the downward piece are covered with the cover material, and a lower end portion of the cover material below the downward piece is fitted into the groove of the edge piece. Armrest device.   The armrest device for a chair according to claim 1, wherein the downwardly facing piece of the core member is formed such that a portion with the engaging claws is thick and a portion without the engaging claws is thin.   The armrest device for a chair according to claim 1 or 2, wherein the engaging hole of the standing piece of the elbow pad and the engaging claw of the core member engaged therewith are rectangular in the horizontal direction.

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