JP2008194127A - Armrest device in chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the elasticity of the entire armrest pad, to provide a comfortable arm padding feeling and to easily attach the armrest pad to an armrest base plate. <P>SOLUTION: The armrest pad 18 comprises a planar core material 19, a cushion material 20 covering the upper surface, and an elastic surface decorative material 21 covering the upper surface of the cushion material 20, the outer peripheral surface of the core material 19 and the cushion material 20 and the peripheral end part lower surface of the core material 19. The peripheral edge part of the lower end of the surface decorative material 21 is held between the upper end of an upward edge piece 24 provided on the outer peripheral edge of the armrest base plate 17 and the peripheral end part lower surface of the core material 19, and the armrest pad 18 is attached to the upper surface of the armrest base plate 17. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an armrest device for a chair, in which an armrest pad is attached to the upper surface of an armrest substrate provided at the upper end of an armrest support rod.

Examples of this type of conventional armrest device include those described in Patent Documents 1 and 2.
JP 2000-333776 A JP 2005-131239 A

  In each of the armrest devices described in Patent Documents 1 and 2, the armrest pad attached to the upper part of the armrest substrate covers the hard synthetic resin core material having a large number of openings and the upper surface thereof. In addition, since it is formed of a cover material made of a soft synthetic resin that is insert-molded integrally with the core material, the elasticity when the elbow is applied to the upper surface of the armrest pad is somewhat lacking.

  Moreover, since the armrest pad is fixed to the armrest substrate with a plurality of screws, the fixing portion of the screw in the armrest pad is prevented from being elastically deformed locally, and uniform elasticity cannot be obtained. Also, assembly is troublesome.

  The present invention has been made in view of the above-mentioned problems, and improves the elasticity of the entire armrest pad so that a comfortable armrest feeling can be obtained and the armrest pad can be easily attached to the armrest substrate. It aims to provide an armrest device.

According to the present invention, the above problem is solved as follows.
(1) In an armrest device for a chair in which an armrest pad is attached to the upper surface of an armrest substrate provided at the upper end of an armrest support rod, the armrest pad is composed of a flat core material, a cushion material covering the upper surface, The upper surface of the cushion material, the outer peripheral surface of the core material and the cushion material, and the outer cover material having elasticity that covers the lower surface of the peripheral end portion of the core material, and the peripheral edge portion of the lower edge of the cover material, An armrest pad is attached to the upper surface of the armrest substrate so as to be sandwiched from above and below by the upper end of the upward edge piece provided on the outer peripheral edge and the lower surface of the peripheral end portion of the core member.

(2) In the above item (1), a hanging piece is continuously provided on the peripheral edge of the lower end of the cover material, and this hanging piece is provided on the upper surface of the outer peripheral portion on the inner side of the edge piece on the armrest substrate and opened upward. It fits into the concave groove.

(3) In the above item (1) or (2), the core material is formed of an elastically deformable soft synthetic resin material, the cushion material is formed of a foamed resin, and the cover material is formed of an elastomer.

(4) In any one of the above items (1) to (3), an upright piece is provided on the upper surface of the peripheral end of the armrest substrate, and a downward piece provided on the outer peripheral edge of the core member is externally fitted to the upright piece. To do.

(5) In the above item (4), a plurality of engagement holes are provided on the outer peripheral surface of the standing piece of the armrest substrate, and the engagement claws provided on the inner peripheral surface of the downwardly facing piece of the core material in this engagement hole The armrest pad is attached to the armrest substrate by elastically engaging the armrest.

(6) In the above item (4) or (5), a guide groove having an outer surface inclined obliquely inwardly upward is provided in an upper portion of the engagement hole on the outer peripheral surface of the upright piece.

According to the invention of claim 1, since the armrest pad is provided with the core material, the cushion material, and the elastic covering material, the elasticity of the entire armrest pad is improved, and a comfortable armrest feeling is provided. Can be obtained.
Further, since the peripheral edge portion of the lower end of the cover material is sandwiched from above and below by the edge piece provided on the outer peripheral edge of the armrest substrate and the lower surface of the peripheral end portion of the core material, there is no possibility that the cover material is detached from the armrest substrate.

  According to the invention described in claim 2, since the hanging piece provided on the peripheral edge of the cover material is fitted in the concave groove on the upper surface of the outer periphery of the armrest substrate, the cover material is more difficult to come off than the armrest substrate. Become.

  According to the third aspect of the present invention, the cushion material and the covering material are easily bent downward, and the core material is also elastically deformed appropriately downward, so that a more comfortable feeling of elbow contact can be obtained.

  According to the fourth aspect of the present invention, since the downwardly facing piece of the core material is externally fitted to the standing piece of the armrest substrate, even when a strong force in the lateral direction is applied to the armrest pad, the armrest substrate is bent against the armrest substrate. There is no sticking or misalignment.

  According to the fifth aspect of the present invention, the engagement claw is elastically engaged with the engagement hole, and the armrest pad is moved upward by simply externally fitting the downward piece of the core material to the upright piece of the armrest substrate from above. Since it is prevented from coming off, it is not necessary to use fixing means such as screws, the number of parts can be reduced, and the work of attaching the armrest pad to the armrest substrate is facilitated.

  According to the sixth aspect of the present invention, since the engaging claw is elastically engaged with the engaging hole while being guided by the guide groove, the armrest pad can be easily attached to the armrest substrate from above.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a chair provided with one embodiment of the armrest device of the present invention, and FIG. 2 is a side view of the same.
The chair 1 includes a leg body 2, a seat body 3 provided at an upper portion thereof, a backrest 4, and a pair of left and right armrest devices 5.

  The leg body 2 includes five leg rods 7 having a radial shape with a caster 6 attached to the tip thereof, and a leg column 8 that can be extended and contracted by a gas spring (not shown) that is erected in the center and accommodated in the center. And a support base 9 having a rear end portion fixed to the upper end thereof.

  The backrest 4 includes a backrest support frame 10 and a backrest 11 attached to the upper portion of the front surface. The front end of the support arm 10a facing the front of a pair of left and right lower ends of the backrest support frame 10 It is pivotally attached to the left and right sides of the rear end of the support base 9 by a pivot 12 that faces in the left-right direction.

  The pivot 12 is linked to a forward urging means provided in the support base 9, and the back support frame 10 is urged in a constantly standing direction by the forward urging means, and the urging means. It can be tilted backwards against this.

  The front portion of the seat body 3 is a pair of left and right seat support arms 13 whose lower ends are pivotally attached to both sides of the front end portion of the support base 9, and the rear portion of the back support frame 10 is also the left and right support arms 10 a. Each is supported by the upper part.

  The armrest device 5 is fixed to the lower surface of the side portion of the seat body 3 so that the armrest support cylinder 14 is erected in a slightly forward tilted position from the side of the seat body 3, and a height adjustment (not shown) is provided therein. The armrest support rod 15 fitted with the device so as to be adjustable in height and slidable in the vertical direction is provided, and the armrest 16 is attached to the upper surface of the armrest support rod 15 and faces in the front-rear direction.

As shown in FIGS. 3 to 6, the armrest 16 includes a horizontal plate-like armrest substrate 17 made of a hard synthetic resin and extending in the front-rear direction, and an armrest pad 18 covering the upper surface thereof.
The armrest pad 18 has a required thickness (for example, a foamed resin such as foamed polyurethane or foamed polyethylene having the same size as that of the elastically deformable soft synthetic resin core material 19 having the same size as the armrest substrate 17. And a dome-shaped cover material 21 made of a urethane-based elastomer that is thinner than the cushion material 20 and has an appropriate elasticity.

A plurality of ribs 22 facing in the front-rear direction and the left-right direction are provided on the upper surface of the front side of the armrest substrate 17.
Further, an upright piece 23 and a short edge piece 24 that opens obliquely upward are connected to the upper surface of the peripheral edge of the armrest substrate 17, and a concave groove 25 having a V-shaped cross section is provided between them. It is formed continuously in the circumferential direction.
Engagement holes 26 communicating with the inside and the outside are provided at a plurality of locations around the standing piece 23.

On the outer peripheral edge of the core member 19, a downward piece 27 that is externally fitted to the upright piece 23 of the armrest substrate 17 is connected, and the inner peripheral surface of the downward piece 27 is engaged with the engagement holes 26. A plurality of engaging claws 28 that can be mated are projected inward.
The upper surface of each engagement hole 26 on the outer peripheral surface of the upright piece 23 has an outer surface obliquely inwardly upward for easily engaging the engagement hole 26 from above by guiding an engagement claw 28. An inclined guide groove 29 is formed.

The front and rear, right and left positioning of the cushion material 20 is achieved by fitting the notch grooves 30 and 30 formed at the center portions of the front and rear ends of the cushion material 20 to the center portions of the front and rear ends of the peripheral surface of the core material 19. Protruding portions 31, 31 projecting upward.
A large number of openings 32 are provided at the peripheral edge of the core material 19 so that the die can be easily removed and the central portion of the core material 19 excluding the peripheral edge is easily bent downward. It has been.

  A cover piece 33 covering the outer peripheral surfaces of the core material 19 and the cushion material 20 is inclined inward so that the outer peripheral surface and the outer peripheral surface of the edge piece 24 of the armrest substrate 17 are continuous with the outer peripheral edge of the cover material 21. It is bent downward. An inwardly bent piece 33 a that covers the lower surface of the peripheral end portion of the core member 19 and a hanging piece 33 b that hangs down from the inner end are integrally connected to the lower end of the cover piece 33.

  The rear surface of the armrest substrate 17 is attached to the upper end of the armrest support rod 15 so as to be rotatable about a vertical axis and adjustable in the front-rear position. In addition, since the rotation mechanism of the armrest board | substrate 17, a front-back position adjustment mechanism, etc. are not directly related to this invention, those detailed description is abbreviate | omitted.

  In order to assemble the armrest 16, the cushion material 20 is first positioned and placed on the upper surface of the core material 19, and then the cover material 21 is covered with the cover piece 33 so that the cover piece 33 is elastically deformed outward. . Then, the lower surface of the downward piece 27 in the core material 19 abuts the upper surface of the inwardly bent piece 33a in the cover piece 33, so that the upper surface of the cushion material 20 is displayed on the core material 19 and the cushion material 20. The armrest pad 18 is formed by being held inside the cover material 21 in a state of being in contact with the lower surface of the material 21 (see FIG. 4).

Next, the armrest pad 18 is placed on the armrest substrate 17 so that the downwardly facing piece 27 of the core member 19 is externally fitted to the standing piece 23 on the upper surface of the armrest substrate 17 and pressed strongly. Then, the plurality of engaging claws 28 projecting from the downward piece 27 of the core member 19 are guided while being slidably contacted with the outer surface of the guide groove 29 provided on the standing piece 23 of the armrest substrate 17. When the arm 27 is elastically deformed outward and the armrest pad 18 is further pressed, the engaging claw 28 is elastically engaged with the engaging hole 26.
Thus, the armrest pad 18 is attached to the upper surface of the armrest substrate 17 while preventing it from coming off upward.

  At this time, the hanging piece 33b continuously provided at the lower end of the cover piece 33 of the cover material 21 is fitted into the concave groove 25 of the V-shaped cross section of the armrest substrate 17, and the lower surface of the inwardly bent piece 33a is By pressing against the upper surface of the edge piece 24 of the armrest substrate 17 and being sandwiched by the edge piece 24 and the lower surface of the downward piece 27 of the core material 19 from above and below, the end portion of the cover material 21, that is, the cover piece The lower end of 33 is firmly fixed to the armrest substrate 17, and there is no fear of coming off.

  After the armrest pad 18 is attached, a space is formed between the lower surface of the core member 19 and the upper surface of the armrest substrate 17 and is also separated from the upper end of the rib 22. When the elbow is strongly applied, the core member 19 can be elastically deformed downward.

  As described above, in the armrest device 5 of the above-described embodiment, the armrest pad 18 includes the core material 19 made of a soft synthetic resin, the cushion material 20 such as foamed polyurethane covering the upper surface, and the elasticity covering the armrest pad 18. It is formed by three members, the surface material 21 made of an elastomer, and these are assembled together and attached to the upper surface of the armrest substrate 17, so that the elasticity of the armrest pad 18 as a whole is improved and the upper surface is covered with an elbow. A comfortable feeling of elbow can be obtained.

  Further, the armrest pad 18 can be firmly attached to the armrest substrate 17 only by elastically engaging the plurality of engagement claws 28 provided on the core member 19 with the engagement holes 26 provided on the armrest substrate 17. In addition, fixing means such as screws are not required, the number of parts is reduced, and attachment work is facilitated.

It is a perspective view of a chair provided with one embodiment of the armrest device of the present invention. Similarly, it is a side view. Similarly, it is an exploded perspective view of the principal part of an armrest device. Similarly, it is a perspective view of a state in which an armrest pad is formed. Similarly, it is an enlarged vertical rear view of the engaging portion between the engaging claw of the core material and the engaging hole of the armrest substrate. Similarly, it is an enlarged central longitudinal side view of the entire armrest when the armrest pad is assembled.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chair 2 Leg 3 Seat 4 Backrest 5 Armrest device 6 Casters 7 Legs 8 Leg pillar 9 Support base 10 Back support frame 10a Support arm 11 Back support 12 Axis 13 Seat support arm 14 Armrest support cylinder 15 Armrest support rod DESCRIPTION OF SYMBOLS 16 Armrest 17 Armrest board 18 Armrest pad 19 Core material 20 Cushion material 21 Surface material 22 Rib 23 Standing piece 24 Edge piece 25 Groove 26 Engagement hole 27 Downward piece 28 Engagement claw 29 Guide groove 30 Notch groove 31 Protrusion part 32 Opening 33 Cover piece 33a Inwardly bent piece 33b Hanging piece

Claims (6)

In an armrest device for a chair in which an armrest pad is attached to the upper surface of an armrest substrate provided at the upper end of an armrest support rod,
The armrest pad has a flat core material, a cushion material that covers the upper surface of the armrest pad, and an elastic covering material that covers the upper surface of the cushion material, the outer peripheral surface of the core material and the cushion material, and the lower surface of the peripheral end portion of the core material. The peripheral edge of the lower end of the cover material is sandwiched from above and below by the upper end of an upward edge piece provided on the outer peripheral edge of the armrest substrate and the lower surface of the peripheral end of the core member. An armrest device for a chair, wherein an armrest pad is attached to the upper surface of the armrest substrate.   A hanging piece is continuously provided on the peripheral edge of the lower end of the cover material, and the hanging piece is fitted into a groove that opens upward and is provided on the upper surface of the outer peripheral portion on the inner side of the edge piece of the armrest substrate. Item 2. The chair armrest device according to Item 1.   The armrest device for a chair according to claim 1 or 2, wherein the core material is formed of an elastically deformable soft synthetic resin material, a cushion material is formed of foamed resin, and a cover material is formed of an elastomer.   The armrest of the chair according to any one of claims 1 to 3, wherein an upright piece is provided on the upper surface of the peripheral end of the armrest substrate, and a downward piece provided on the outer peripheral edge of the core member is externally fitted to the upright piece. apparatus.   A plurality of engagement holes are provided on the outer peripheral surface of the standing piece of the armrest substrate, and an engagement claw provided on the inner peripheral surface of the downwardly facing piece of the core material is elastically engaged with the engagement hole, thereby the armrest substrate. The armrest device for a chair according to claim 4, wherein an armrest pad is attached to the chair. The armrest device for a chair according to claim 4 or 5, wherein a guide groove whose outer surface is inclined obliquely inwardly upward is provided in an upper portion of the engagement hole on the outer peripheral surface of the standing piece.

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