JP2007325667A - Armrest device of chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an armrest device of a chair by which the assembly, inspection and replacement work of a wire can be freely and easily performed anytime in a short time. <P>SOLUTION: In the armrest device of the chair, an arm pad 20 directed back and forth is provided at the upper end of an armrest column 14 raised from the side part of a seat body and an operation lever 25 for pulling the wire linked with an adjusting means for adjusting the positions of the respective parts of the chair, energizing force, or the like is provided at the front upper part of the armrest column 14. In the armrest device of the chair, a recessed groove 22 directed in a vertical direction is provided on the front surface of the armrest column 14, the wire linked with the operation lever 25 is housed in the recessed groove 22, and a cover 36 for covering the front surface opening of the recessed groove 22 is attachably and detachably provided on the front surface of the armrest column 14. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an armrest device for a chair, and more particularly, to an armrest device for a chair provided with an operation lever for pulling a wire linked to an adjusting means for adjusting the position or urging force of each part of the chair.

Examples of this type of chair armrest device include those described in Patent Documents 1 to 3.
Japanese Utility Model Publication No.59-10648 Japanese Utility Model Publication No. 62-40951 JP 2004-113501 A

However, as for the armrest device of the chair described in these patent documents 1-3, since the wire which links an operation lever and various adjustment means has penetrated the inside of an armrest support | pillar, Only after the wire is inserted through the armrest struts, both ends of the wire cannot be connected to the operating lever and various adjusting means. That is, after connecting both ends of the wire to the operation lever and various adjusting means, the wire cannot be inserted into the armrest strut.
Therefore, the assembling work is complicated and takes time, and the wire inspection and replacement work is also troublesome.

  The present invention has been made in order to solve the above-described problems, and the chair armrest device chair that can easily perform assembly, inspection, and replacement of wires at any time in a short time. It aims to provide an armrest device.

According to the present invention, the above problem is solved as follows.
(1) An armrest that faces in the front-rear direction is provided at the upper end of the armrest strut that stands up from the side of the seat body. In an armrest device for a chair provided with an operation lever for pulling a wire linked to an adjusting means for adjusting, a concave groove facing up and down is provided on the front surface of the armrest column, and the concave groove is linked to the operation lever. A cover that accommodates the wire and covers the front opening of the concave groove is detachably provided on the front surface of the armrest post.

(2) In the above item (1), the lower end portion of the concave groove is communicated with a wire insertion hole provided in the mounting portion of the armrest column in the chair, and the wire accommodated in the concave groove is inserted into the wire insertion hole. And the locking piece provided in the lower end part of the cover is locked to the opening part of the said wire penetration hole.

(3) In the above item (2), a projecting piece facing rearward that fits into the recessed groove of the armrest column is provided on the edge of the lower end of the cover that contacts the mounting portion, and the side surface of the tip of the projecting piece The locking piece provided on the wire is fitted and locked to the opening of the wire insertion hole so that the protruding piece comes into contact with the mounting portion.

(4) In the above items (1) to (3), an elastic engagement piece having an engagement claw at the tip is provided on the rear surface of the upper end of the cover, and this elastic engagement piece is connected to the front surface of the armrest strut or there Is fitted into an engagement hole provided on the front surface of the housing that accommodates the operation lever, and the engagement claw is engaged with the rear end edge of the engagement hole.

(5) In any one of the above items (1) to (4), a protrusion protruding from the rear surface of the intermediate portion of the cover is press-fitted into a boss hole provided in the front surface of the armrest strut.

According to the first aspect of the present invention, the front surface of the armrest strut is provided with a concave groove facing in the vertical direction, and the cover that accommodates the wire linked to the operation lever in the concave groove and covers the front opening of the concave groove. Is detachably provided on the front of the armrest strut, so by removing the cover, the middle part of the wire can be easily put in and out from the front into the groove, and the assembly, inspection and replacement work of the wire Can be done easily, freely, in a short time.
In addition, after the middle part of the wire is accommodated in the recessed groove, the cover is attached to the front surface of the armrest strut so that the wire accommodated in the recessed groove is not exposed to the outside and presents a beautiful appearance. Can do.

According to the invention of claim 2, the lower end portion of the groove is communicated with the wire insertion hole provided in the mounting portion of the armrest column in the chair, the wire accommodated in the groove is inserted into the wire insertion hole, and Since the locking piece provided at the lower end of the cover is locked to the opening of the wire insertion hole, the engagement hole for locking the lower end of the cover has an armrest strut, its mounting portion, etc. Therefore, the structure can be simplified.
Moreover, the locking piece locked to the opening of the wire insertion hole can also be used as a protective material for preventing the wire from rubbing against the opening edge of the wire insertion hole and being damaged.

  According to the third aspect of the present invention, at the edge of the lower end portion of the cover, which is in contact with the mounting portion, the rearward projecting piece that fits into the recessed groove of the armrest support column is provided, and the front end portion side surface of the projecting piece is provided. Since the provided locking piece is fitted and locked to the opening of the wire insertion hole so that the protruding piece abuts the mounting portion, the armrest strut, its mounting portion, and the cover The appearance of the joint can be improved.

  According to the invention of claim 4, an operation is provided in which an elastic engagement piece having an engagement claw at the tip end portion is provided on the rear surface of the upper end portion of the cover, and the elastic engagement piece is attached to the front surface of the armrest strut or to it. Since the engagement claw is engaged with the rear end edge of the engagement hole, the upper end of the cover is attached to the front of the armrest column. In addition, it can be easily and reliably attached and can be easily removed.

  According to the invention described in claim 5, since the protrusion protruding from the rear surface of the intermediate portion of the cover is press-fitted into the boss hole provided in the front surface of the armrest column, the protrusion is directed toward the boss hole when the cover is mounted. By simply pushing backward, the middle part of the cover is easily positioned and held in good shape.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a chair provided with an embodiment of the present invention.
As shown in FIG. 1, the chair (1) includes a leg body (4) having a plurality of radial leg rods (3) each provided with a caster (2) at the tip. A telescopic leg column (5) is erected at the center of the leg body (4), and a support base (6) is provided at the upper end of the leg column (5).

  The front base of the pair of left and right back support rods (8) that support the backrest (7) is pivotally supported by the support base (6) with a shaft (9) facing in the left-right direction. The backrest (7) and the backrest support rod (8) can be tilted rearward by a reclining mechanism (not shown) provided in the inside.

  The front part of the seat body (10) disposed above the support base (6) is supported by the front part of the support base (6) with a pair of left and right support links (11). The rear portion of the left and right back support rods 8 is supported by a bearing piece 12 projecting upward from a portion near the front end of the forward arm 8a (only one of which is shown). The seat (10) is pivotally mounted with the shaft (13) facing the side so that the backrest (7) and the backrest support rod (8) can be moved rearward and downward in conjunction with the backrest (7). It has become.

  As shown in FIGS. 2 and 3, a rectangular parallelepiped for attaching an armrest strut (14) is provided behind the bearing piece (12) in the forward arm (8a) of the left and right backrest support rods (8). The mounting portion (15) is integrally formed so as to be continuous with the bearing piece (12).

The mounting surface (16) for mounting the armrest strut (14), which is the outer side surface of the mounting portion (15), is provided with a pair of front and rear projecting portions (17) and (17) in the shape of an upward bullet. A screw hole (18) facing in the left-right direction is provided at the top of each protrusion (17).
A wire insertion hole (19) penetrating in the left-right direction is provided in a portion of the attachment portion (15) ahead of the front protrusion (17).

The armrest strut (14) stands on the side of the seat body from the mounting portion (16) .In this example, the armrest strut (14) has a rhombus frame shape with the side view tilted forward, and the upper end of the armrest strut (14) A pad (20) is provided.
The lower end of the armrest strut (14) bends approximately 90 ° toward the inside of the chair (1), and the front and rear two pieces that complement the projections (17) and (17) provided on the inner end face The front and rear bolts (21) and (21) that fit the recesses (not shown) of the projections (17) and (17) and penetrate the lower end of the armrest strut (14) in the left-right direction, It is firmly attached to the outer surface of the attachment portion (16) by being screwed into and tightened into the screw holes (18) and (18).

  When the armrest strut (14) is attached to the outer surface of the attachment portion (16), the wire insertion hole (19) is the lower end portion of the concave groove (22) facing the substantially vertical direction provided on the front surface of the armrest strut (14). And communicates with the inwardly open end of the portion bent inward along the front surface of the armrest strut (14).

  As shown in FIG. 6, the upper end of the forward strut portion (14a) tilting forward in the armrest strut (14) is recessed to form a gap (S) with the front portion of the armrest (20). A step (23) is provided.

  The middle part in the left-right direction at the corner from the recessed step (23) to the front surface of the front strut (14a) in the armrest strut (14) communicates with the upper end of the concave groove (22) and rearwardly. A recessed portion (24) for recessed is provided, and a housing (26) for accommodating the operating lever (25) is fitted from the front, and is fixed with two upper and lower mounting screws (27) and (27). Yes.

  The operating lever (25) has its operating end (25a) protruding forward from the front surface of the housing (26) and the front strut (14a), and its base end faces in the left-right direction. A wire hooking portion (29) that is pivotally attached to the shaft (28) and has an arc shape in a side view is provided on one side surface of the intermediate portion.

  The wire (30) has a laterally pin-shaped wire end member (31) fixed to one end of the wire (30), which is locked to an intermediate portion of the housing (26), and from there, the wire of the operation lever (25) After being hung on the hanging portion (29), it is inserted downward into a flexible outer tube (32) in which one end is fixed to the lower end portion of the housing (26).

  A Bowden cable (33) is formed by the wire (30) and the outer tube (32). The Bowden cable (33) passes from the lower end of the housing (26) sequentially through the concave groove (22) provided in the front surface of the armrest post (14) and the wire insertion hole (19) in the mounting portion (16). The backrest support rod (8) is pulled inward and connected to various adjusting means (not shown) provided below the seat body (10).

  As the adjusting means, for example, by pulling the wire (30), the backrest (7) can be rotated, and by loosening the wire (30), the rotation of the backrest (7) is stopped. The angle adjustment device of the backrest (7) and the gas spring with lock (not shown) provided in the telescopic leg (5) of the chair (1) by pulling the wire (30) The unlocking button is pushed to the operating position, allowing the height of the seat (10) to be adjusted, and the wire (30) is loosened, so that the unlocking button returns to the inoperative position and the seat ( It can be a known adjusting means for adjusting the position or urging force of each part of the chair (1), such as a seat height adjusting device that fixes the height of 10).

  The operating lever (25) has a pin (34) projecting from its side surface floating in an arc hole (35) provided on the side wall (26a) of the housing (26) with the axis (28) as the center of curvature. Within the possible range, it can be pivoted in the vertical direction around the axis (28), and is always located at the stop position shown in FIG. 6, and the operation part (25a) is indicated by an arrow in FIG. Further, by rotating upward, the wire (30) can be pulled upward by the wire hooking portion (29), and the adjusting means can be operated.

  When the hand is released from the operation lever (25), the wire (30) is built in the adjusting means or pulled back by a return spring (not shown) provided separately, and the operation lever (25) is shown in FIG. To the stop position shown in FIG.

  As shown in FIGS. 2 to 5, the front surface of the armrest strut (14) has a substantially J-shaped cover (36) in front view with its lower end bent inward so as to be the same shape as the front surface shape. Further, it is detachably mounted so as to cover the front opening of the concave groove (22) in which the wire (30) is accommodated.

  The cover (36) has a front plate (37) that is substantially J-shaped when viewed from the front, and a left and right projection that protrudes rearward from the rear surface of the upper end and has an outward engaging claw (38) at the rear end. A pair of elastic engagement pieces (39) and (39), and a pair of upper and lower protrusions (40) and (40) projecting from the rear surface of the middle part of the front plate (37) and having a cross-sectional cross-shaped bar shape; The groove (22) of the armrest strut (14) is connected to the inner edge of the inwardly bent portion at the lower end of the front plate (37) and the cover (36) is attached to the armrest strut (14). The rear projecting piece (41) that fits inside and contacts the mounting surface (16), and the rear end of the projecting piece (41) are connected to the armrest strut (14). When the cover (36) is attached, the locking piece (42) facing inward is fitted into the wire insertion hole (19) of the mounting portion (15) and locked to the front edge of the opening. And.

The cover (36) is attached to the front surface of the armrest strut (14) as follows.
That is, as shown in FIGS. 3 and 4, first, the protruding piece (41) inside the lower end of the cover (36) is placed in the groove (22) of the armrest strut (14) close to the mounting surface (16). After fitting from the front, the entire cover (36) is moved inward, and the locking piece (42) is fitted into the wire insertion hole (19) in the mounting portion (15), and the protruding piece (41) Is brought into contact with the mounting surface (16).
Thereby, the lower end inner side of the cover (36) is locked to the attachment surface (16) and the front surface of the base end portion of the armrest support (14).

  Next, as shown in FIGS. 3 and 5, a pair of left and right elastic engagement pieces (39) and (39) in the cover (36) are provided facing the rear from the front surface of the housing (26). The engagement holes (43) and (43) are fitted, and the respective engagement claws (38) are locked to the outer edges of the rear ends of the engagement holes (43), and the middle portion of the front plate (37). A pair of upper and lower protrusions (40) and (40) protruding from the rear surface are press-fitted into boss holes (44) and (44) provided in a groove (22) on the front surface of the armrest support (14).

  When the engaging claws (38) are locked to the outer edge at the rear end of the engaging hole (43), each elastic engaging piece (39) is removed from the engaging holes (43) (43). The upper end of the cover (36) is prevented from moving forward, and each elastic engagement piece (39) is fitted into the engagement hole (43), and each projection (40) is By press-fitting into the hole (44), the upper and middle parts of the cover (36) are prevented from moving in the vertical direction, left-right direction, and rearward direction, and the cover (36) Installed securely.

  By setting the engaging claw (38) in an arc shape or a mountain shape in a plan view, each elastic engaging piece (39) can be extracted from the engaging hole (43), thereby removing the cover (36). It can be easily removed from the front surface of the armrest strut (14) by reversing the above procedure.

Since this embodiment is configured as described above, by removing the cover (36), the intermediate portion of the wire (30) can be easily put in and out of the groove (22) from the front, and the wire The assembly, inspection, and replacement work of (30) can be easily performed at any time in a short time.
In addition, after the intermediate portion of the wire (30) is accommodated in the concave groove (22), the cover (36) is attached to the front surface of the armrest strut (14), whereby the wire accommodated in the concave groove (22). (30) is not exposed to the outside and can have a beautiful appearance.

The lower end portion of the concave groove (22) communicates with a wire insertion hole (19) provided in the mounting portion (15) of the armrest strut (14) in the chair (1), and the wire accommodated in the concave groove (22) ( 30) is inserted into the wire insertion hole (19), and the locking piece (42) provided at the lower end of the cover (36) is locked to the opening of the wire insertion hole (19). It is not necessary to provide an engagement hole or the like for locking the lower end of the cover (36) in the armrest strut (14), its mounting portion (15) or the like, and the structure can be simplified.
Further, the locking piece (42) locked to the opening of the wire insertion hole (19) prevents the wire (30) from being rubbed and damaged by the opening edge of the wire insertion hole (19). It can also be used as a protective material.

  At the edge of the lower end of the cover (36) that contacts the mounting portion (15), a rearward projecting piece (41) that fits into the recessed groove (22) of the armrest strut (14) is provided. The locking piece (42) provided on the side surface of the tip of the piece (41) is fitted into the opening of the wire insertion hole (19) so that the projecting piece (41) is in contact with the mounting portion (15). Therefore, the appearance of the joint portion between the armrest strut (14), its mounting portion (15), and the cover (36) can be improved.

  An elastic engagement piece (39) having an engagement claw (38) at the tip is provided on the rear surface of the upper end of the cover (36), and the elastic engagement piece (39) is connected to the front surface of the armrest strut (14), or It is fitted to the engagement hole (43) provided on the front surface of the housing (26) that accommodates the operation lever (25), and the engagement claw (38) is connected to the rear end of the engagement hole (43). Since it is latched to the edge, the upper end of the cover (36) can be easily and reliably attached to the front surface of the armrest support (14), and can be easily removed.

  In addition, the protrusion (40) protruding from the rear surface of the middle part of the cover (36) is press-fitted into the boss hole (44) provided on the front surface of the armrest post (14), so when the cover (36) is installed The intermediate part of the cover (36) can be easily positioned and held in good appearance simply by pushing the protrusion (40) backward toward the boss hole (44).

In the above embodiment, the attachment portion (15) is provided on the backrest support rod (8), but this is formed on the side surface of the support base (6) or the lower side surface of the seat body (10). The armrest strut (14) may be attached to the side surface of the support base (6) or the lower side surface of the seat body (10).
Further, the engagement hole (43) into which the elastic engagement piece (39) is fitted may be provided directly in the armrest strut (14) instead of the housing (26).
Further, the operation lever (25) may be provided on the lower surface of the front part of the elbow rest (20).

It is a side view of a chair provided with one embodiment of the armrest device of the present invention. Similarly, it is the perspective view which looked at the part of the armrest apparatus from diagonally forward. Similarly, it is an exploded perspective view. Similarly, it is the disassembled perspective view which looked at the front-end part of the backrest support collar and the lower end of a cover from diagonally back. Similarly, it is the perspective view which looked at the attachment state of the upper part of the cover to the housing for operation levers from diagonally back. It is the expansion vertical side view which longitudinally cut the front upper part of the armrest support | pillar in the center.

Explanation of symbols

(1) Chair
(2) Casters
(3) Footpad
(4) Leg
(5) Pillar
(6) Support base
(7) Backrest
(8) Back support
(8a) Front arm
(9) Axis
(10) Seat
(11) Support link
(12) Bearing piece
(13) Axis
(14) Armrest prop
(14a) Front strut
(15) Mounting part
(16) Mounting surface
(17) Projection
(18) Screw hole
(19) Wire insertion hole
(20) Elbow rest
(21) Bolt
(22) Groove
(23) Recessed step
(24) Recessed part
(25) Control lever
(25a) Operation unit
(26) Housing
(26a) Side wall
(27) Mounting screw
(28) axis
(29) Wire hook
(30) Wire
(31) Wire end member
(32) Outer tube
(33) Bowden cable
(34) Pin
(35) Arc hole
(36) Cover
(37) Front plate
(38) Engaging claw
(39) Elastic engagement piece
(40) Protrusion
(41) Projection
(42) Locking piece
(43) Engagement hole
(44) Boss hole
(S) Gap

Claims (5)

Adjustment to adjust the position or urging force of each part of the chair on the front part of the armrest or the front upper part of the armrest strut at the upper end of the armrest strut standing up from the side of the seat In an armrest device for a chair provided with an operation lever for pulling a wire linked to the means,
The front surface of the armrest post is provided with a concave groove facing in the vertical direction, and a cover that accommodates the wire linked to the operation lever and covers the front opening of the concave groove is provided in the front surface of the armrest post. An armrest device for a chair, which is detachably provided on the chair.   The lower end portion of the concave groove is communicated with a wire insertion hole provided in the mounting portion of the armrest column in the chair, and the wire accommodated in the concave groove is inserted into the wire insertion hole and provided at the lower end portion of the cover. The armrest device for a chair according to claim 1, wherein a stop piece is locked to the opening of the wire insertion hole.   Provided on the edge of the lower end of the cover that contacts the mounting portion is a rearward projecting piece that fits into the recessed groove of the armrest strut, and the locking piece provided on the side surface of the tip of the projecting piece is The armrest device for a chair according to claim 2, wherein the protruding piece is fitted and locked to the opening of the wire insertion hole so that the protruding piece comes into contact with the mounting portion.   An elastic engagement piece having an engagement claw at the tip is provided on the rear surface of the upper end of the cover, and this elastic engagement piece is provided on the front surface of the armrest strut or on the front surface of the housing that accommodates the operation lever. The armrest device for a chair according to any one of claims 1 to 3, wherein the engaging claw is fitted into the engaging hole and the engaging claw is locked to a rear end edge portion of the engaging hole. The armrest device for a chair according to any one of claims 1 to 4, wherein a protrusion projecting from the rear surface of the intermediate portion of the cover is press-fitted into a boss hole provided in the front surface of the armrest strut.

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