JP3644221B2 - Chair armrest device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armrest device for a chair, and more particularly to an armrest device for a chair in which an armrest portion is attached to a support portion rising from a seat portion or a leg portion.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, it is known that an armrest portion is attached to a support portion rising from a seat portion or a leg portion of a chair so that the height of the armrest portion can be adjusted. And, the support part is composed of a support arm fixed to the attachment part on both sides of the seat part or the leg part by screws and a lifting body to which an armrest part is attached, and the height adjustment incorporated in the support arm It has a structure in which an elevating body is linked so as to be vertically movable by a mechanism.
[0003]
For this reason, the said support part, especially a support arm are the mirror symmetry type for right side and left side from the relationship with a height adjustment mechanism, and the relationship attached to a right-and-left attachment part, respectively. Then, four attachment holes were formed in the base portion of the support arm, and four screw holes were formed in the attachment portion corresponding to the attachment holes, and attached with four screws on the left and right sides. However, since the mounting hole and the screw hole have the same shape and the same arrangement on the left and right, the right and left support arms may be mounted incorrectly.
[0004]
Therefore, in order to prevent the above-described mounting error, the mounting holes and the screw holes are provided in three, and the mirrors are symmetrical in the left-right mirror plane and are asymmetrical in the front-rear direction. Therefore, it is necessary to form the right and left support arms with different molds, which is the biggest problem in reducing the manufacturing cost.
[0005]
[Problems to be solved by the invention]
In view of the above-mentioned situation, the present invention intends to solve the problem that the support part for mounting and supporting the armrest part, in particular, the support arm can be manufactured in the same mold so that it can be used for both the right side and the left side. An object of the present invention is to provide an armrest device for a chair in which a manufacturing cost is reduced and a treatment is performed so that a mounting error does not occur between the right side and the left side.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a chair armrest device in which an armrest portion is attached to a support portion rising from a seat portion or a leg portion, and the armrest device on both sides of the seat portion or the leg portion. A mounting portion for screwing the support arm constituting the support portion is provided, the support arm is formed in a symmetrical shape so that it can be used in the left and right directions in the outer shape, and a plurality of mounting holes for screwing are formed in the base portion of the support arm Of the mounting holes, the right and left mounting holes having different shapes, and the other mounting holes as common mounting holes, and the left mounting hole for the right support arm. Fit the right cap with the right display and fit the hole shape, and fit the left cap with the left display and the right mounting hole to the right mounting hole of the left support arm. The mounting part has a common mounting hole A position corresponding to the fine right mounting holes or left mounting holes constitute armrest apparatus chair by forming a screw hole.
[0007]
Here, it is preferable that the base portion of the support arm is formed with a pair of front and rear right mounting holes and a left mounting hole on the base end side and a pair of front and rear common mounting holes on the distal end side. .
[0008]
Further, each mounting hole has a through-hole through which the screw shaft of the screw is inserted and a counterbore hole for burying the head of the screw, and the counterbore of the right mounting hole and the left mounting hole are directed to each other. More preferably, the right cap and the left cap are composed of leg portions that are secured to the through holes and display portions that are fitted to the counterbore holes.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 and 2 show a chair according to the present invention, FIGS. 3 to 6 show the main part of the present invention, in which 1 is a leg of the chair, 2 is a seat, 3 is a backrest, 4 Is an armrest device, 5 is a support portion, 6 is an armrest portion, 7 is a support arm, 8 is a lifting body, and 9 is an attachment portion.
[0010]
The armrest device 4 according to the embodiment of the present invention is such that the armrest portion 6 is provided so that the height can be adjusted and the vertical angle can be adjusted with respect to the support portion 5 rising vertically from the seat portion 2 or the leg portion 1. The support portion 5 has a structure in which a hollow elevating body 8 having a built-in height adjusting mechanism (not shown) is fitted on an upper portion of a support arm 7 fixed to the seat portion 2 so as to be slidable up and down.
[0011]
The armrest device 4 according to the present invention is provided with attachment portions 9 for screwing the support arms 7 constituting the support portions 5 on both sides of the seat portion 2 so that the support arms 7 can be used in the left and right directions in the outer shape. A plurality of mounting holes 11 for screwing are formed in the base portion 10 of the support arm 7, and a pair of front and rear mounting holes of the mounting holes 11,. The right mounting hole 11A and the left mounting hole 11B are formed, the other mounting holes are the common mounting holes 11C, and the left mounting hole 11B of the right support arm 7A matches the hole shape and has a right with a right display. The left cap 12A is fitted to the right mounting hole 11A of the left support arm 7B and the left cap 12B with the left display is fitted. Hole 11C and right mounting hole 1A or screw holes at positions corresponding to the left mounting hole 11B 13, is obtained by forming a ....
[0012]
Specifically, in the base portion 10 of the support arm 7, a pair of front and rear right mounting holes 11A and 11B are formed on the base end side, and a pair of front and rear common mounting holes 11C, 11C is formed. That is, the right support arm 7A and the left support arm 7B have the same shape and can be molded using the same mold. However, as shown in FIGS. 3 and 6, the support arm 7 is insert-molded with a metal support plate 14 that constitutes a height adjustment mechanism. When insert molding is performed using the same mold, when the support plate 14 is mounted in the mold, the direction thereof may be set to be reversed in the front and rear directions for right and left. The support plate 14 may be common for the right side and the left side.
[0013]
Each of the mounting holes 11 has a through hole 16 through which the screw shaft 15A of the screw 15 is inserted and a counterbore hole 17 in which the head portion 15B of the screw 15 is buried. The counterbore holes 17 and 17 of the mounting hole 11B are elongated in different directions. In this embodiment, the counterbore hole 17 of the right mounting hole 11A is horizontally long and the counterbore hole 17 of the left mounting hole 11B is vertically long. doing. The right cap 12 </ b> A and the left cap 12 </ b> B are formed of synthetic resin, and include a leg portion 18 that is secured to the through hole 16 and a display portion 19 that is fitted to the counterbore hole 17. ing. Here, as shown in FIGS. 4 and 5, the display portion 19 of the right cap 12A is formed as a vertically long shape by forming a “right” character on the surface, and the display portion 19 of the left cap 12B is The letter “left” is formed on the surface as a horizontally long oblong shape by molding.
[0014]
Further, a metal bush 20 is fitted into the through hole 16 of the common mounting hole 11C to increase the fastening strength by the screw 15. The bush 20 is formed with a through hole through which the screw shaft 15A of the screw 15 is inserted.
[0015]
And, since the right cap 12A is definitely fitted in the left mounting hole 11B and the right mounting hole 11A is exposed to the right support arm 7A, the display of the right cap 12A is confirmed, The base 10 of the right support arm 7A is joined to the right mounting portion 9 of the chair, and three screws 15,... Are screwed using the two common mounting holes 11C and 11C and the right mounting hole 11A. It is attached by screwing to 13,. Similarly, the left support arm 7B has a left cap 12B securely fitted in the right mounting hole 11A and the left mounting hole 11B is exposed. The base 10 of the support arm 7B is joined to the left mounting portion 9 of the chair, and the three screws 15,... Are screwed into the screw holes 13,... Using the two common mounting holes 11C, 11C and the left mounting hole 11B. It is installed by screwing.
[0016]
【The invention's effect】
The chair armrest device of the present invention constructed as described above has the same shape by forming the support portion for mounting and supporting the armrest portion, particularly the support arm so that it can be used for both right and left. Since it can be manufactured with a mold, the manufacturing cost can be greatly reduced, and the mounting holes that are not used are left on the support arm, leaving the mounting holes on the mounting side, and the mounting holes are closed with caps. The unnecessary mounting holes are not available, and it is indicated that the support arm is attached to the cap, so the right and left support arms can be accurately attached to the corresponding positions. .
[Brief description of the drawings]
FIG. 1 is a side view of a chair to which an armrest device of the present invention is applied.
FIG. 2 is a front view of the chair.
FIG. 3 is an enlarged side view of a support arm.
FIG. 4 is an enlarged bottom view of a base portion of a support arm.
FIG. 5 is a perspective view of a cap.
FIG. 6 is a partial cross-sectional view showing the relationship between the mounting portion of the seat portion and the base portion of the support arm.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Leg part 2 Seat part 3 Backrest part 4 Armrest apparatus 5 Support part 6 Armrest part 7 Support arm 7A Right support arm 7B Left support arm 8 Lifting body 9 Attachment part 10 Base 11 Attachment hole 11A Right attachment hole 11B Left attachment Hole 11C Common mounting hole 12A Right cap 12B Left cap 13 Screw hole 14 Support plate 15 Screw 15A Screw shaft 15B Head 16 Through hole 17 Counterbore 18 Leg 19 Display portion 20 Bush 27 Compression coil spring

Claims (3)

A chair armrest device in which an armrest portion is attached to a support portion rising from a seat portion or a leg portion, wherein the support arm constituting the support portion is screwed to both sides of the seat portion or the leg portion. The support arm is formed in a symmetric shape so that the support arm can be used for both left and right in the outer shape, and a plurality of mounting holes for screwing are formed in the base of the support arm, and a pair of front and rear of the mounting holes The mounting holes are the right mounting hole and the left mounting hole with different hole shapes, and the other mounting holes are the common mounting holes. The left mounting hole of the right support arm matches the hole shape and displays for the right. A right cap with a left display arm fitted to the right mounting hole of the left support arm and fitted with a left display, and a common mounting hole and Compatible with right mounting hole or left mounting hole Armrest apparatus chair wherein the position that obtained by forming a screw hole in that. The chair according to claim 1, wherein the chair is a base portion of the support arm, wherein a pair of front and rear right mounting holes and a left mounting hole are formed on the base end side, and a pair of front and rear common mounting holes are formed on the distal end side. Armrest device. Each of the mounting holes has a through hole through which the screw shaft of the screw is inserted and a counterbore hole for burying the head of the screw, and the counterbore holes of the right mounting hole and the left mounting hole have different directions. 3. An armrest device for a chair according to claim 1, wherein the right cap and the left cap are composed of leg portions that are secured to the through holes and display portions that are fitted to the counterbore holes.

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