JP2012095932A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair securing a sufficient space under a seat to bend the seat, and stably supporting the seat.SOLUTION: A supporting base 5 supported by a leg body 3 has right and left sides both provided with a pair of right and left base rods 10 directed back and forth, the right and left base rods 10 have front ends continuously provided with a pair of seat-supporting rods 11 extending upward, the base rods 10 have rear ends continuously provided with backrest-supporting rods 12 extending upward, the seat supporting rods 11 have upper ends fixedly attached with a front portion 14a of a seat-receiving frame 14 which supports the front part and both side parts of the seat 6 and has a C-shape when viewed from the front, the rear ends of the seat-receiving frame 14 are fixed to the backrest-supporting rods 12, the seat-receiving frame 14 is mounted with a seat, and the backrest is mounted to the pair of right and left backrest-supporting rods 12.

Description

  The present invention relates to a chair.

  As a chair used in a narrow shared space such as a conference room, there is a chair that can turn the seat in the left-right direction and cannot tilt backward (for example, see Patent Document 1).

JP 2006-325931 A

  In the chair described in Patent Document 1, the left and right backrest support ridges are attached to both sides of a horizontally long support base facing in the left-right direction, the seat is mounted on the support base, and the central portion of the support base is attached. Since it is supported by the pedestal, sufficient space for bending the seat downward cannot be secured between the seat and the support base, and the seat support may become unstable. .

  The present invention has been made in view of the above problems, and can secure a sufficient space for bending the seat below the seat, and can support the seat with a leg with a stable and simple structure. The aim is to provide a chair that can be.

According to the present invention, the above problem is solved as follows.
(1) A pair of left and right base rods facing in the front-rear direction are provided on both left and right sides of the support base supported by the legs, and a pair of seat support rods extending upward at the front ends of the left and right base rods A back support rod extending upward at the rear end of the base rod, and supporting the front and both sides of the seat at the upper end of the seat support rod. A front portion of the letter-shaped seat receiving frame is fixed, a rear end of the seat receiving frame is fixed to the backrest supporting rod, a seat is attached to the seat receiving frame, and a backrest is attached to the backrest supporting rod. .

  With such a configuration, between the seat and the support base, a seat support frame that supports the front and both sides of the seat, a seat support rod that supports the seat support frame, and a backrest that supports the seat frame. Since there is only a heel, a sufficient space can be secured between the seat and the support base to bend the seat downward.

In addition, the seat support frame that supports the front part of the seat and both the left and right sides is supported by the left and right seat support rods and the left and right backrest support rods, so that the seat is supported stably and with a simple structure. be able to.
Furthermore, the seat support supporting rod, the backrest supporting rod, and the seat receiving frame can be supported by the leg simply by attaching the support base to the leg.
Incidentally, the “U-shaped seat receiving frame” includes a mouth-shaped seat receiving frame.

(2) In the above item (1), the intermediate portions in the vertical direction of the left and right backrest support rods are connected by a connection rod facing in the left-right direction, and the rear end of the seat receiving frame is fixed to the connection rod. To do.

  With such a configuration, the connecting rod can increase the rigidity of the left and right backrest support rods, and can also prevent the left and right backrest support rods from spreading from side to side. Further, the rear portion of the seat receiving frame can be reliably supported by the connecting rod.

(3) In the above item (2), a through hole through which the backrest support rod is inserted is provided in the connection rod.

  With such a configuration, the connecting rod can be easily attached to the backrest supporting rod simply by inserting the back supporting rod into the through hole of the connecting rod.

(4) In any one of the above items (1) to (3), a pair of fitting recesses opening upward are provided on the left and right side portions of the support base, and the lower portions of the left and right base ridges are provided. The base rod is fixed to the support base by fitting the fitting recess.

  With such a configuration, the base rod can be easily positioned and attached to the support base. Further, the opening edge of the fitting recess and the base ridge can be easily fixed by welding or the like.

(5) In any one of the above items (1) to (4), the engaging convex portions provided on either one of both side portions of the support base and both side portions of the lid covering the upper portion of the support base, It is made to fit in the engagement recessed part provided in the other.

  With such a configuration, the upper portions of the base ridges provided on the left and right side portions of the support base can be easily covered with the lid, and the base ridge can be prevented from being displaced or detached.

(6) The left and right seat support rods are connected by a horizontal rod facing in the left-right direction, and the front portion of the seat receiving frame is fixed to the horizontal rod.

  With such a configuration, the seat support frame can be supported more stably, and the seat support rod can be easily fixed to the seat support frame.

(7) The seat support rod is extended outward and obliquely upward, and the backrest support rod is extended outward and obliquely upward, and further bent upward to extend upward. The portions slightly above the bent portions of the left and right backrest supporting rods are connected by the connecting rod.

  With such a configuration, the seat can be stably supported with a large area and a sufficient space for bending downward can be secured and the support base can be made smaller than the seat.

  According to the present invention, since the seat is supported by the pair of left and right seat support rods and the pair of left and right back support rods, the seat can be stably supported. Moreover, sufficient space can be ensured between the seat and the support base to bend the seat downward.

It is a front view of a chair provided with one embodiment of the present invention. Similarly, it is a side view. It is the perspective view which looked at the support frame from diagonally forward upper part. It is the IV-IV line expanded sectional view in FIG. It is the perspective view which looked at the chair provided with one embodiment of the present invention from the diagonally forward lower part. It is the VI-VI line expanded sectional view in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 to 3, this armchair-equipped chair includes a leg body 3 having five leg rods 2 having a radial shape with a caster 1 at the tip. In the center of the leg 3, an extendable leg column 4 having a gas spring (not shown) is erected, and a support base 5 is fixed to the upper end of the leg column 4. A support frame 8 that supports the seat 6 and the backrest 7 is attached to the support base 5. On the left side of the support base 5 in the figure, an operation lever 9 that faces the left and right direction of a gas spring (not shown) projects.

  The support base 5 is substantially rectangular in plan view (see FIGS. 3 and 5). The support frame 8 is a pair of base rods 10 and 10 facing in the front-rear direction that are embedded and fixed to the left and right sides of the support base 5, and the outer and oblique fronts that are connected to the front end of each base rod 10. A seat support rod 11 that extends upward, a back support rod 12 that is connected to the rear end of each base rod 10, faces upward in the oblique direction and bends 12 a upward from the middle, and faces forward and upward. A horizontal reed 13 (see FIG. 5) that connects the upper ends of the left and right seat support rods 11 and 11 and that is fixed to the backrest support rods 12 and 12 and is fixed to the front support 6 and the left and right sides of the seat 6. And a seat receiving frame 14 for supporting the frame.

  As shown in FIG. 4, the base rod 10 is fitted into the upward concave portions 15 provided on the left and right side portions of the support base 5, and the upper surface is welded 10 a to the opening edge of the upward concave portion 15. It is firmly fixed to the support base 5.

  A cover that covers the upper part of the support base 5 and the left and right base rods 10 in an engagement recess 17 that opens upward and outward, provided on the outer peripheral edge of the lower case 16 provided on the lower surface of the support base 5. A downward engaging projection 19 received on the outer peripheral edge of the plate 18 is engaged.

  The portions slightly above the bent portions 12 a and 12 a of the left and right backrest support rods 12 and 12 are connected to each other by a connection rod 20 that has a larger diameter than the backrest support rod 12 and faces in the left-right direction. That is, the through-holes 21 that are provided on both sides of the connecting rod 20 and face in the vertical direction are fitted to the backrest supporting rod 12.

  The seat receiving frame 14 is a pair of left and right front heels 14a that support the front portion of the seat 6 and left and right ends of the front ridges 14a that extend backward from the left and right sides, and the middle portion gently bends in a mountain shape. It has side rods 14b, 14b, and rear rods 14c, 14c that are inwardly connected to the rear ends of both side rods 14b, 14b.

As shown in FIG. 5, the front rod 14 a of the seat receiving frame 14 is fixed to the front portion of the horizontal rod 13 that connects the front ends of the left and right seat support rods 11, 11. Similarly, as shown in FIG. 3, the rear rods 14 c and 14 c are fixed to a connecting rod 20 that connects the left and right backrest supporting rods 12 and 12.
The rear collars 14c and 14c of the seat receiving frame 14 may be omitted, and the rear parts of the side collars 14b and 14b of the seat receiving frame 14 may be fixed to the backrest supporting collars 12 and 12.

  An engagement member 22 facing in the left-right direction having a plurality of engagement pieces 22 a protruding forward is fixed to the upper surface of the front collar 14 a of the seat receiving frame 14. An engagement piece 23a that protrudes inward is provided at a portion slightly rearward from the center of each side rod 14b. An engagement piece 23b that protrudes forward is provided on the rear collar 14c of the seat receiving frame 14.

  As shown in FIG. 6, the seat 6 includes a seat frame 24 having a rectangular frame shape, and a tension member 25 stretched in the internal space of the seat frame 24, and a front piece 24 a of the seat frame 24 includes An engagement groove 26 that opens rearward is provided. The rear piece 24b of the seat frame 24 is inclined rearward and upward. On the lower surface of the rear piece 24b, there is a concave portion 27 opened downward by a convex portion 24c projecting downward and a projecting piece 24d projecting downward, which are provided at intervals in the front-rear direction. Is formed.

  To attach the seat 6 to the seat receiving frame 14, the engaging groove 26 of the front piece 24 a in the seat frame 24 is engaged with the engaging piece 22 a in the front piece 14 a of the seat receiving frame 14. Further, the rear collar 14 c and the coupling collar 20 are fitted into the recess 27 in the rear piece 24 b of the seat frame 24, and the engagement piece 23 b of the rear collar 14 c is connected to the convex section 24 c in the seat frame 24. It is fixed to the lower surface of the screw with screws.

Further, engagement grooves (not shown) on both the left and right side portions of the seat frame 24 are engaged with the engagement pieces 23 a and 23 a of the left and right side flanges 14 b and 14 b of the seat receiving frame 14.
Thereby, the seat 6 is securely attached to the seat receiving frame 14 without being displaced.

  As shown in FIG. 2, the backrest 7 is attached by fitting lower portions of the left and right side portions 7 a, 7 a to portions above the bent portions 12 a, 12 a of the backrest support rods 12, 12. Since the backrest 7 and the specific structure of the fitting portion are not directly related to the present invention, detailed illustration and description thereof will be omitted.

  In the chair of the present embodiment, the seat support rod 11 and the back support rod 12 that extend upward are connected to both ends of the base rod 10, so that in the process of manufacturing the support frame 8, Only by bending, a space for bending the seat downward can be secured.

  Since the connecting rod 20 can use a linear rod material, it can suppress that processing cost increases. Further, since the left and right attachment rods 14c, 14c of the seat receiving frame 14 are fixed to the connecting rod 20, the rear portion of the seat 6 can be supported over a wide area.

  The seat frame 14 is formed in advance so as to be U-shaped in a plan view, and its front portion 14a is fixed to the horizontal rod 13 of the support frame 8, and the rear mounting rods 14c and 14c are connected to the connecting rod 20. It can be attached to the support frame 8 simply by being fixed. Therefore, compared with the case where the front portion 14a, the side portions 14b and 14b, and the attachment rods 14c and 14c of the seat receiving frame 14 are separately attached to the seat support rod 11 and the backrest rod 12, the processing is facilitated.

The present invention is not limited only to the above-described embodiment, and can be implemented in the following modified mode, for example, without departing from the scope of the claims.
(1) The support base 5 has the same size as the seat receiving frame 14, the base rods 10 are provided on both the left and right sides of the support base 5, and the seat support rods 11 from the front and rear ends of the base rod 10, and The backrest support rod 12 is extended upward, and the seat receiving frame 14 is mounted thereon.
(2) The connecting rod 20 is fixed to the left and right backrest supporting rods 12 by welding or the like.
(3) The seat receiving frame 14 is formed in a mouth shape, and the rear ends of the left and right side rods 14b, 14b are connected by a rear rod that is connected to the rear ends of the both side rods 14b, 14b and faces in the left-right direction.

DESCRIPTION OF SYMBOLS 1 Caster 2 Leg rod 3 Leg body 4 Pillar 5 Pillar 6 Seat 7 Backrest 8 Support frame 9 Operation lever 10 Base rod 10a Welding (part)
11 Seat support rod 12 Back support rod 12a Bending portion 13 Horizontal rod 14 Seat receiving frame 14a Front rod 14b Side rod 14c Rear rod 15 Upper concave portion 16 Lower concave portion 17 Engaging concave portion 18 Lid plate 19 Engaging convex portion 20 Connecting rod 21 Through-hole 22 Engagement member 22a Engagement piece 23a Engagement piece 23b Engagement piece 24 Seat frame 24a Front piece 24b Rear piece 24c Projection 24d Projection piece 25 Tension material 26 Engagement groove 27 Recess

Claims (7)

  A pair of left and right base rods facing in the front-rear direction are provided on both left and right sides of the support supported by the legs, and a pair of left and right seat support rods extending upward are connected to the front ends of the left and right base rods. A back support rod extending upward is connected to the rear end of the base rod, and the front and both sides of the seat are supported at the upper end of the seat support rod in a plan view. A front portion of the seat-supporting frame is fixed, a rear end of the seat-receiving frame is fixed to the backrest support rod, a seat is attached to the seat-supporting frame, and a backrest is attached to the backrest support rod. A chair characterized by that.   The chair according to claim 1, wherein intermediate portions in the vertical direction of the left and right backrest support rods are connected to each other by a connection rod facing in the left-right direction, and a rear end of the seat receiving frame is fixed to the connection rod.   The armrest mounting structure for an armrest according to claim 1 or 2, wherein a through-hole for penetrating the backrest supporting rod is provided in the connecting rod.   A pair of fitting recesses that open upward are provided on the left and right side portions of the support base, and the lower portions of the left and right base ridges are fitted into the fitting recesses, whereby the base portion is connected to the base portion. The chair according to any one of claims 1 to 3, wherein a heel is fixed.   The engagement convex part provided in any one of the both sides of the said support base and the both sides of the lid | cover which covers the upper part of the said support base was fitted to the engagement recessed part provided in the other. A chair according to any of the above.   The chair according to any one of claims 1 to 5, wherein the left and right seat support rods are connected by a horizontal rod facing in the left-right direction, and a front portion of the seat receiving frame is fixed to the horizontal rod.   The seat support rod is extended outward and obliquely upward, and the backrest support rod is extended outward and obliquely upward, and further bent upward to extend upward, The chair according to claim 2, wherein a portion slightly above the bent portion of the back support heel is connected by the connection heel.

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