JP2022026376A - Chair - Google Patents

Abstract

To provide a chair having a structure which facilitates installment of an option for a support body.SOLUTION: The chair has a structure in which a memo stand D as an option can be attached to a support body A for supporting a seat. The support body A is equipped with laterally paired left/right leg constitution members 1 and with a joint material 2 which is composed of a member separate from the left/right leg constitution members 1 and which is interposed between the left/right leg constitution members 1 to connect them. The option is provided with an option body and an arm 9 for supporting the option body. A base end arm constitution part 91 that is the base end part of the arm 9 is designed to be integrally connected to the joint material 2.SELECTED DRAWING: Figure 12

Description

The present invention relates to a chair preferably used in an office or the like.

Conventionally, a chair in which an option is attached to a support that supports the seat has been known (see, for example, Patent Document 1).

The support of the chair to which the option is attached includes four legs, and most of them have the main part integrated by welding. In the past, the option was attached to the support by welding or attaching the optional component to the integrated support via a bracket.

However, the conventional one has a problem that the work of attaching an option to the support tends to be complicated.

Japanese Unexamined Patent Publication No. 2004-261298

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a chair having a configuration in which an option can be easily attached to a support.

That is, the present invention has the following configuration.

The invention according to claim 1 is a chair in which an option is attached to a support that supports the seat, wherein the support is a pair of left and right leg components, and these left and right leg components. Is composed of separate members and includes a joint material that is interposed between the left and right leg components to connect the two, and the option includes an option body and an arm that supports the option body. It is a chair provided, and the base end portion of the arm is integrally connected to the joint material.

According to a second aspect of the present invention, the arm is made of a pipe material, and the base end portion is fixed to the lower surface side of the joint material along the longitudinal direction of the joint material. Item 1 is the chair.

In the invention according to claim 3, the option main body is arranged on either the left or right side of the joint material, and the end portion of the base end portion is arranged on the other side of the joint material. The chair according to claim 1 or 2, which is provided.

The invention according to claim 4 is a rear leg in which the left and right leg components are respectively extended in the vertical direction, and a front leg integrally extended from the upper portion of the rear leg toward the front side. It is provided with a joint portion extending in the middle portion in the longitudinal direction of the front leg and having a tip portion connected to a side end portion of the joint material, and the arm forms a linear portion along the longitudinal direction of the joint portion. The chair according to claim 1, 2 or 3.

The invention according to claim 5 is the chair according to claim 4, wherein the linear portion and the joint portion are connected to each other via a bracket.

The invention according to claim 6 is claimed 1, 2, 3, 4 or 5 in which the option is a memo stand including a top plate which is the option main body and the arm which supports the top plate. The chair described.

According to the seventh aspect of the present invention, the seat can be changed in posture between a posture in which the seat can be seated on the support and a posture in which the seat stands upright on the floor surface. The posture can be changed with respect to the arm between a substantially horizontal usage posture and a retracting posture retracted from this usage posture, and the seat is held in the standing posture and the top plate is retracted. The chair according to claim 6, which is configured to be able to nest in the front-rear direction with other chairs having the same structure while being held in a posture.

As described above, according to the present invention, it is possible to provide a chair having a configuration in which an option can be easily attached to a support.

The perspective view which shows one Embodiment of this invention. Front view in the same embodiment. The rear view in the same embodiment. Left side view in the same embodiment. Right side view in the same embodiment. The plan view in the same embodiment. Bottom view in the same embodiment. The perspective view in the same embodiment. The right side view which shows the stacking state in the same embodiment. FIG. 2 is a sectional view taken along line XX in FIG. An exploded perspective view of the same embodiment. An exploded perspective view of the same embodiment. The perspective view in the same embodiment. The perspective view in the same embodiment. The perspective view in the same embodiment. The perspective view which shows the other embodiment. The plan view of the seat plate in the same embodiment. An enlarged view for explaining a hole in the same embodiment. FIG. 17 is a sectional view taken along line YY. The perspective view which shows the other embodiment. The plan view of the seat plate in the same embodiment. FIG. 21 is a sectional view taken along line ZZ in FIG.

Hereinafter, embodiments of the chair will be described.

The embodiment shown in FIGS. 1 to 15 is a chair in which other chairs having the same structure can be stacked in the front-rear direction on the floor surface. The chair has a support A having a leg component 1 formed by die-casting aluminum, a cushion type seat B1 rotatably supported by the support A, and a back plate C supported by the support A. And an optional memo stand D supported by the support A.

Hereinafter, each configuration of the chair will be described in detail.

<< Support A >>
The support A is composed of left and right leg constituent members 1 formed by injection molding aluminum die casting in pairs on the left and right, and members separate from the left and right leg constituent members 1, and the left and right leg constituent members. It is provided with a joint material 2 that is interposed between the ones and connects the two.

<Leg component 1>
The left and right leg constituent members 1 have a substantially symmetrical shape. The left and right leg components 1 are integrally formed by die-casting aluminum. The left and right leg components 1 are integrally extended from the rear leg 11 and the upper end portion of the rear leg 11 toward the front side, and the front leg 12 is extended to the intermediate portion in the longitudinal direction of the front leg 12 and the tip portion is jointed. It is provided with a joint portion 13 connected to a side end portion of the material 2.

Castors 14 are provided at the lower ends of the rear legs 11 and the lower ends of the front legs 12. The inner surfaces of the left and right rear legs 11 are provided with synthetic resin rear dampers F that can exert a cushioning function with other chairs entering from the rear and a positioning function with other chairs during stacking.

The hind legs 11 extend in the vertical direction. The hind legs 11 extend in the vertical direction in a forward tilted posture in a lateral view. The hind legs 11 are in an inclined posture so that the lower part is located outside the upper part in the front view and the back view.

A back plate connecting portion 11a projecting upward is provided at the upper end portion of the rear leg 11. The back plate connecting portion 11a has a shape of being internally fitted into a fitting hole (not shown) formed downward in the extending portion c2 of the back plate C. The extending portion c2 of the back plate C is externally fitted to the back plate connecting portion 11a provided on the leg constituent member 1. Then, the extending portion c2 of the back plate C and the back plate connecting portion 11a are fixed by the screw v1.

The front leg 12 connects between the inclined front leg portion 12a extending linearly in a backward tilted posture in a lateral view and the upper end portion of the inclined front leg portion 12a extending in the front-rear direction and the upper end portion of the rear leg 11. It is provided with a front leg portion 12b. In the front leg 12, the inclined front leg portion 12a is located in the front portion, and the upper front leg portion 12b is located in the rear portion.

The front legs 12 are in an inclined posture so that the lower portion is located inside the upper portion in the front view and the back view. The width dimension of the inclined front leg portion 12a in the side view is set to be shorter than the width dimension of the upper front leg portion 12b in the side view.

The front leg 12 is provided with a holding portion 12c capable of rotatably supporting the seat B1 on the inner surface side of the upper front leg portion 12b located above the front leg 12. The holding portion 12c has a bottomed hole shape that is open inward. A shaft member P for pivotally supporting the seat B1 is attached to the holding portion 12c.

The joint portion 13 is provided so as to project inward toward the front in the middle portion in the longitudinal direction of the front leg 12. The joint portion 13 is projected from the longitudinal intermediate portion of the front leg 12, more specifically, from the inner surface side of the upper portion of the inclined front leg portion 12a of the front leg 12. The joint portion 13 extends forward substantially horizontally from the inclined front leg portion 12a in a side view. The joint portion 13 extends inward substantially horizontally in front view.

The joint portion 13 extends diagonally forward in the bottom view. The joint portion 13 is provided with a screw insertion hole h2 penetrating in the left-right direction at the tip portion 13b thereof. The tip portion 13b of the joint portion 13 has a shape that can be fitted to the joint material 2. The tip portion 13b of the joint portion 13 is internally fitted into the recessed portion 21 provided at the end portion of the joint material 2. The leg component 1 having the joint portion 13 is connected to the joint material 2 by using the screw v2 inserted into the screw insertion hole h1 of the tip portion 13b of the joint portion 13.

The screw v2 that connects the joint material 2 and the leg component 1 is concealed by a cover G that has a substantially L-shape in a plan view and also has a cushioning function with other chairs.

The rear damper F is attached to the inner surface of the left and right rear legs 11 constituting the leg component 1, respectively.

<Joint material 2>
The joint material 2 has a prismatic shape extending in the left-right direction. The joint material 2 can function as a seat holder that can support the seat B1 from below. The joint material 2 has a substantially square columnar shape extending in the left-right direction. The joint material 2 has an upward surface 22 that is substantially horizontal and a downward surface 23 that is substantially horizontal.

The lower surface of the horizontal frame portion 7 of the seat B1 in the use posture (S) comes into contact with the upward surface 22 of the joint material 2 via the cushioning member 73. The joint material 2 is provided with a nut portion h2 to which a screw v2 inserted from the outside can be screwed into both left and right ends. The joint material 2 is attached to the joint portion 13 provided on the leg constituent member 1 by a screw v2.

A memo stand D is attached to the joint material 2. The base end arm component 91 of the arm 9 is rigidly connected to the downward surface 23 of the joint material 2 by welding.

<< Seat B1 (Cushion type seat B1) >>
The seat B1 is rotatably supported between a usable posture (S) that can be seated on the support A and an upright posture (U) that stands up against the floor surface. The seat B1 changes its posture between a usage posture (S) in which the seating surface m1 faces upward and the seated person can sit, and an standing posture (U) in which the seating surface can stand up against the floor and perform stacking in the front-rear direction. It is configured to be possible. The seat B1 is rotatably supported by the upper front leg portion 12b of the front leg 12 in the support body A via the shaft member P.

The seat B1 includes a cushion-type seat body J in which a cushion 4 is arranged on a shell body 3 having a shape that bulges downward, and a seat frame K that can support the seat body J. In the seat B1, the load of the seated person can be transmitted to the joint material 2 via the upholstery 5, the cushion 4, the shell body 3, and the horizontal frame portion 7 in the usage posture (S). ..

<Seat body J>
The seat body J is supported by the support A via the seat frame K. The seat body J includes a shell body 3 having a shape that bulges downward, a cushion 4 supported by the shell body 3, and an upholstery 5 that covers the outer surface of the cushion 4.

The shell body 3 includes a shell body main body 31 that constitutes a main portion, and a frame attachment portion 32 that protrudes downward from the lower surface of the shell body main body 31. The shell body body 31 and the frame attachment portion 32 constituting the shell body 3 are integrally formed of synthetic resin.

The shell body 31 has a substantially rectangular shape in a plan view. The shell body 31 has a container shape with the upper side open. In other words, the shell body body 31 has a shape in which the upper side is opened and the upper side is recessed toward the lower side. The shell body 31 is formed with a cushion accommodating space sp capable of accommodating the cushion 4 based on the shape recessed downward.

As shown in FIG. 10, the central portion of the shell body 31 in the left-right direction has a substantially S-shaped cross-sectional shape. In other words, the shell body body 31 has a shape in which the front portion 31a is recessed upward and the rear portion 31b is bulging downward with the position where the frame attachment portion 32 is provided as a boundary. Is doing.

That is, in the seat frame K, the left and right side frame frame portions 61, the front frame frame portion 62, and the horizontal frame portion 7 form an annularly continuous front annular portion K1 and the left and right side frames. The frame portion 61, the rear frame frame portion 63, and the horizontal frame portion 7 form an annularly continuous rear annular portion K2.

The portion of the shell body 31 constituting the shell body 3 surrounded by the front annular portion K1, that is, the front portion 31a has an upwardly concave shape, and is rear of the shell body body 31 constituting the shell body 3. The portion surrounded by the annular portion K2, that is, the rear portion 31b has a shape that bulges downward.

The shell body 3 is attached to the horizontal frame portion 7 of the seat frame K. More specifically, a frame attachment portion 32 is projected downward at the center portion of the lower surface of the shell body body 31 in the front-rear direction. The frame attachment portion 32 is configured to be always attached to the upper surface of the horizontal frame portion 7 of the seat frame K.

The rear portion of the shell body 3 is provided with a claw engaging portion ka to which the claw portion tm provided on the seat frame K can engage.

The frame attachment portion 32 is arranged substantially parallel to the front lateral rib 32a, which has an upright wall shape extending in the left-right direction, and behind the previous horizontal rib 32a, and extends in the left-right direction. The lateral ribs 32b after forming an upright wall, the front lateral ribs 32a, and the rear lateral ribs 32b are arranged at three locations in the front-rear direction, the left portion, the right portion, and the central portion so as to connect them. It is provided with a vertical rib 32c in the shape of an upright wall extending to.

The cushion 4 is made of a known material such as urethane foam and has a constant elastic rebound force. The lower portion of the cushion 4 has a shape corresponding to the concave shape of the shell body body 31. That is, the lower portion of the cushion 4 has a shape that fills the cushion accommodating space sp provided in the shell body body 31.

The thickness dimension w2 of the rear portion 42 of the cushion 4 supported by the rear portion 31b of the shell body body 31 is longer than the thickness dimension w1 of the front portion 41 of the cushion 4 supported by the front portion 31a of the shell body body 31. It is set. Therefore, the rear portion 42 of the cushion 4, which can mainly support the buttocks of the seated person, is provided with suitable cushioning properties.

The upholstery 5 is mainly composed of a cloth and covers the upper surface and the peripheral edge of the cushion 4, and also covers the peripheral edge 3e of the shell body 3. The edge 5e of the upholstery 5 is held between the lower surface of the peripheral edge portion 3e of the shell body 3 and the upper surface of the frame frame portion 6 of the seat frame K by an appropriate method.

<Seat frame K>
The seat frame K is formed of a synthetic resin and has a frame frame portion 6 that can support the peripheral edge portion of the seat body J. The seat frame K is rotatably supported with respect to the support A via the shaft member P. The seat frame K pivotally supported by the seat B1 can support the seat body J from below. The seat frame K is arranged so as to be visible from the outside. In other words, the seat frame K is exposed to the outside.

The seat frame K includes a frame frame portion 6 adjacent to the lower surface of the peripheral edge portion of the seat body J, and a horizontal frame portion 7 erected on the frame frame portion 6. The seat frame K is formed by integrally forming a frame frame portion 6 and a horizontal frame portion 7 with a synthetic resin.

The frame frame portion 6 connects the left and right side frame frame portions 61, the front frame frame portion 62 connecting the front end portions of the left and right side frame frame portions 61, and the rear end portions of the left and right side frame frame portions 61. It is provided with a frame frame portion 63.

The left and right side frame frame portions 61 are provided with a shaft insertion hole 61a through which a shaft member P for rotatably supporting the seat B1 can be inserted. A collar portion p1 is formed at the inner end of the shaft member P. The flange portion p1 of the shaft member P is adapted to be attached to the inner surface side of the side frame frame portion 61. The frame frame portion 6 is made of, for example, reinforced nylon and has high rigidity, and in cooperation with the shaft member P directly attached to the left and right leg constituent members 1, the left and right leg constituent members 1 Are trying not to separate from each other.

The horizontal frame portion 7 has a shape curved so as to form a convex downward in the front view. The horizontal frame portion 7 is erected between the left and right side frame frame portions 61 in the frame frame portion 6. The horizontal frame portion 7 is substantially horizontal in the left-right direction between the inclined extending portion 71 protruding diagonally downward from the inner side surface of the left and right side frame frame portions 61 and the tip portions of the left and right inclined extending portions 71. It is provided with an extended horizontal horizontal portion 72. A rectangular plate-shaped cushioning member 73 is provided on the lower surface of the horizontal horizontal portion 72 so that the cushioning member 73 comes into contact with the joint member 2.

<< Back plate C >>
The back plate C includes a back plate main body c1 having a backrest surface that can be attached to the back of the seated person, and left and right extending portions c2 extending downward from the left and right lower ends of the back plate main body c1. Be prepared.

In the back plate C, fitting holes (not shown) provided in the left and right extending portions c2 are adapted to fit outside the back plate connecting portion 11a provided in the support A. The left and right extending portions c2 are provided with screw insertion holes h1. Then, the back plate C is attached to the support A by screwing the screw v1 through which the screw insertion hole h1 is inserted to the nut n1 provided in the back plate connecting portion 11a.

<< Memo stand D >>
The optional memo stand D is a sky that is interposed between the top plate 8 that is the option main body, the arm 9 that supports the top plate 8, and the top plate 8 and the arm 9 so that the top plate 8 can be supported in a posture-changeable manner. It is provided with a plate support mechanism L.

The top plate 8 has a substantially rectangular plate shape. The top plate 8 can change its posture with respect to the arm 9 between a substantially horizontal usage posture (M) and a retracted posture (T) retracted from the usage posture (M). That is, the top plate 8 is configured to be repositionable by the top plate support mechanism L between a usage posture (M) in which various articles can be placed on the upper surface and a retracting posture (T) in which the top plate 8 hangs down in the vertical direction. ing.

The arm 9 is made of a metal pipe material. The arm 9 is connected via a base end arm component 91, which is a base end portion extending substantially linearly in the left-right direction, and a lower bend portion 92, which is a bend portion, from a left end portion, which is one end portion of the base end arm component portion 91. An intermediate arm component 93, which is a linear portion located under the joint portion 13 and extends along the longitudinal direction of the joint portion 13, and a bent portion from the left end portion, which is one end of the intermediate arm component 93. A main arm component 95 that is continuously provided via a rear bend 94 and extends diagonally upward and forward from the base end to the tip, and a front bend portion that is a bend from the front end of the main arm component 95. It is provided with a front end arm component 97 that is continuously provided via 96 and extends linearly toward the front.

The base end arm component 91 is integrally connected to the joint material 2. That is, the base end arm component 91 is arranged along the longitudinal direction of the joint material 2, and is fixed to the lower surface side of the joint material 2, that is, the downward surface 23 by welding.

The top plate 8 of the memo stand D is arranged so as to be biased to the left side of the joint material 2 of the support A. On the other hand, the terminal portion 91e of the base end arm constituent portion 91 constituting the arm 9 of the memo stand D is arranged on the right side of the central portion in the left-right direction of the joint material 2.

The intermediate arm component 93 is set to be located below the joint portion 13 on the left side. The intermediate arm component 93 is arranged along the longitudinal direction of the joint 13. The intermediate arm component portion 93 and the joint portion 13 are connected to each other via a bracket br. Since the intermediate arm component portion 93 is located along the bottom of the joint portion 13, the appearance is not impaired.

In this embodiment, the bracket br is previously fixed to the intermediate arm component 93 by welding. The intermediate arm component 93 is stably supported by the joint portion 13 by screwing the screw v3 inserted into the screw insertion hole h3 of the bracket br to a nut (not shown) provided in the joint portion 13. It has become.

The top plate support mechanism L includes a first rotary support portion L1 rotatably provided around the axial center of the tip portion of the arm 9, that is, around the axial center of the front end arm component 97 in the front end arm component 97. It has a known configuration including a second rotary support portion L2 rotatably provided with respect to the first rotary support portion L1 and having a mounting plate L21 screwed to the back surface of the top plate 8. be.

As shown in FIG. 9, the chair provided with the seat B1 and the memo stand D holds the seat B1 in the upright posture (U) and the top plate 8 of the memo stand D in the retracted posture (T). In this state, it is configured so that it can be nested in the front-back direction with other chairs having the same structure.

<< Configuration that can flexibly manufacture two types of seats B1 and B2 >>
As shown in FIGS. 13 to 15, the chairs shown in this embodiment have two types of seat bodies J and E having different structures from the seat frame K having the frame frame portion 6 which is a frame-shaped portion. By attaching one seat body (either the seat body J or the seat body E) selected from the above, the seat (seat B1 or seat B2) can be manufactured. The two types of seat bodies J and E are configured to be removable from the seat frame K by using a screw v4 as a fastener.

In FIG. 13, two types of seat bodies J and E are shown. The seat body J shown in FIGS. 13 and 14 is a cushion type in which the upholstery 5 is stretched on the upper surface of the cushion 4 and the upper surface of the upholstery 5 is the seating surface m1. The seat body E shown in FIGS. 13 and 15 is a seat plate type having the upper surface of the plate-shaped body as the seating surface m2.

The two types of seat bodies J and E are each detachably configured with respect to the seat frame K in a state of being pivotally supported by the support A. That is, the seat is attached to the support A by screwing the screw v4 inserted into the screw insertion hole h4 provided in the frame frame portion 6 of the seat frame K to the nuts n4 provided in the seat bodies J and E. One of the two types of seat bodies J and E can be attached to the frame K.

The cushion type seat body J constitutes a seat B1 pivotally supported by the support A unless it is attached to the seat frame K in a state of being rotatably supported by the support A via the shaft member P. You can't do it. That is, when the seat body J is attached to the seat frame K, the rear portion 31b of the shell body 31 in the shell body 3 can prevent the shaft member P connecting the support A and the seat frame K from being inserted or removed. It is designed to be located.

Even if the cushion type seat body J is attached to the seat frame K to form the seat B1 and then the seat B1 is attached to the support A, it will interfere with the shell body 3 constituting the seat body J. Since the shaft member P cannot be inserted into the seat frame K and the support A, it is impossible to attach the seat B1 to the support A.

<< Seat plate type seat B2 >>
As shown in FIG. 16, the chair is formed by attaching the seat plate type seat body E to the seat frame K pivotally supported by the support A, thereby mounting the seat plate type seat body K and the seat plate type seat body. It is possible to construct a seat plate type seat B2 provided with E. Similar to the cushion type seat B1, the seat plate type seat B2 rotates between a usable posture (S) that can be seated on the support A and an upright posture (U) that stands up against the floor surface. It is configured to be possible.

The seat plate type seat body (hereinafter referred to as "seat plate E") has a substantially rectangular shape in a plan view, and has a seat plate body E1 having a plurality of holes N penetrating in the vertical direction and a seat plate. It is provided with a peripheral edge portion E2 provided on the outer peripheral edge of the main body E1.

The seat plate main body E1 constituting the seat plate E has a hole N provided in the central region R in the front-rear direction and the left-right direction in the plurality of holes N provided in the seat plate main body E1. It is the largest formed in. The size of the plurality of holes N provided in the seat plate main body E1 is formed so as to gradually decrease from the central region R toward the outer side, that is, the peripheral edge portion E2 side surrounding the outer peripheral edge of the seat plate main body E1. ..

In other words, the outside from the central region R includes the front, the rear, the left and right sides, the diagonal front, and the diagonal rear from the central region R.

The thickness dimension of the seat plate main body E is set to be substantially uniform as a whole. Therefore, the volume of the hole N is set so as to gradually decrease from the central region R toward the outside.

Of the plurality of holes N drilled in the vertical direction in the seat plate main body E1, the hole N provided in the vicinity of the peripheral edge portion E2 is formed to be the smallest. The seat plate body E1 is formed so that the hole N gradually becomes smaller and disappears in the process from the central region R to the peripheral region E2.

Six holes N are arranged so as to surround the specific holes N at approximately equal distances.

As shown in the enlarged view of FIG. 18, the opening edge Ne forming the plurality of holes N has a substantially symmetrical shape with respect to the center point ct in the front-rear direction and the left-right direction in a plan view. In other words, the opening edge Ne forming the plurality of holes N has a point-symmetrical shape with respect to the virtual center point ct.

The opening edge Ne of the plurality of holes N has a shape having no sharp angle of 90 ° or less in a plan view. More specifically, as shown in FIG. 18, the opening edge Ne has a shape in which the four sides constituting the square indicated by the two-dot chain line are curved outward so as to be convex outwards, respectively. Nothing.

The seat plate E has a peripheral edge portion E2 which is a region having no hole in the outer peripheral edge of the seat plate main body E1. The lower surface side of the peripheral edge portion E2 is supported by the frame constituting the chair, that is, the frame frame portion 6 of the seat frame K supported by the support body A. That is, the frame frame portion 6, which is a frame constituting the chair, constitutes the seat plate type seat B2 together with the seat plate E composed of the seat plate main body E1 and the peripheral edge portion E2.

The frame that can support the peripheral edge of the seat plate is not limited to that constituting the seat as shown in FIG. 16, and examples thereof include those shown in FIG. 20.

In the chair shown in FIG. 20, the seat plate H and the back plate Q are supported by the support frame I. The frame constituting the chair in the figure is a support made of a metal pipe material including a base frame portion i1 which is a leg frame, a front leg frame portion i2, and a rear leg frame portion i3, and a metal plate material. It points to frame I.

The specific configuration of the seat plate H is the same as that of the seat plate type seat body (seat plate E) except for the specific structure for supporting the seat plate I, and thus the same reference numerals are given. , Detailed description shall be omitted.

The support frame I that supports the seat plate H has a base frame portion i1 that is paired left and right and extends in the front-rear direction substantially parallel to the floor surface, and a front leg frame portion i2 that is erected at the front end portion of the base frame portion i1. And the rear leg frame portion i3 erected at the rear end portion of the base frame portion i1, and the side seat receiving frame portion i4 erected between the upper end portion of the front leg frame portion i2 and the upper end portion of the rear leg frame portion i3. , The front horizontal frame portion i5 connecting the front ends of the side seat receiving frame portion i4, the rear horizontal frame portion i6 connecting the rear ends of the side seat receiving frame portion i4, and the upper end portion of the rear leg frame portion i3. It is provided with a back support frame portion (not shown) extending upward from the rear end portion of the side seat receiving frame portion i4.

The rear leg frame portion i3, the base frame portion i4, the front leg frame portion i2, the side seat receiving frame portion i4, and the back support frame portion are continuously formed of a single metal pipe material.

The front horizontal frame portion i5 and the rear horizontal frame portion i6 are formed of a metal plate.

The peripheral portion E of the seat plate H is formed by the front horizontal frame portion i5 and the rear horizontal frame portion i6 formed of the metal plate, and the left and right side seat receiving frame portions i4 formed of the metal pipe material. A square frame-shaped seating frame IW that can support the above is configured.

As described above, in the chair according to the present embodiment, the memo stand D, which is an option, is attached to the support A that supports the seat B1. Then, the support A is composed of the left and right leg constituent members 1 paired left and right and the members separate from the left and right leg constituent members 1, and both are interposed between the left and right leg constituent members 1. It is provided with a joint material 2 to be connected. The memo stand D includes a top plate 8 which is an optional main body and an arm 9 which supports the top plate 8, and the base end arm component 91 which is the base end portion of the arm 9 is integrated with the joint material 2. It is connected.

Therefore, it is possible to provide a chair having a configuration in which an optional memo stand D can be easily attached to the support A.

That is, since the joint material 2 constitutes the support A and is separate from the left and right leg constituent members 1, the arm 9 and the joint material 2 can be connected in advance. It has become.

Moreover, since the joint material 2 plays a role of connecting the left leg component 1 and the right leg component 1, appropriate rigidity is required. Since the arm 9 is integrally connected to the joint material 2, not only can the memo stand D having excellent stability be provided, but also a configuration having excellent maintainability can be adopted. ..

The arm 9 is made of a pipe material, and the base end arm component 91, which is the base end portion, is fixed to the lower surface side, that is, the downward surface 23 of the joint material 2 along the longitudinal direction of the joint material 2. ing.

Therefore, the arm 9 itself is lightweight and has excellent rigidity, and is fixed at a suitable position in the joint material 2.

The top plate 8 which is the option main body is arranged on the left side which is one side of the joint material 2 in the front view, and the terminal portion 91e of the base end arm component portion 91 which is the base end portion is the joint material 2. It is arranged on the right side, which is the other side.

Therefore, by locating the end portion 91e of the arm 9 on the opposite side of the top plate 8, the weight balance of the entire chair is not excessively biased to one side (left side) where the top plate 8 which is the option main body is arranged. It is composed of.

The left and right leg components 1 are attached to the rear leg 11 extending in the vertical direction, the front leg 12 integrally extending from the upper part of the rear leg 11 toward the front side, and the longitudinal intermediate portion of the front leg 12, respectively. An extended tip portion 13b is provided with a joint portion 13 connected to a side end portion of the joint material 2. Then, the arm 9 has an intermediate arm component portion 93 which is a linear portion along the longitudinal direction of the joint portion 13.

For this reason, since the intermediate arm component 93 of the arm 9 is along the longitudinal direction of the joint portion 13, the arms 9 are arranged in an orderly manner along the joint portion 13, giving an unobtrusive and complicated impression from the outside. It is possible to maintain an appearance that is difficult to give.

The intermediate arm component portion 93 and the joint portion 13 are connected to each other via a bracket br.

Therefore, since the arm 9 is fixed not only to the joint member 2 but also to the left leg constituent member 1, it can be stably supported by the support A.

The seat B1 can change its posture between a usable posture (S) that can be seated on the support A and an upright posture (U) that stands up against the floor surface. The top plate 8 can change its posture with respect to the arm 9 between the used posture (M) which is substantially horizontal and the retracted posture (T) retracted from the used posture (M).

The chair is configured so that it can be nested in the front-rear direction with other chairs having the same structure while the seat B1 is held in the upright posture (U) and the top plate 8 is held in the retracted posture (T). Has been done.

Therefore, even if the chair is provided with the memo stand D, when not in use, a plurality of chairs having the same structure can be nested in the front-rear direction to be compactly organized.

The present invention is not limited to the embodiment described in detail above.

The options are not limited to the memo stand. As an option, for example, a device holder for supporting an electronic device such as a luggage storage or a smartphone can be mentioned.

The base end portion of the arm is not limited to the one connected to the joint material by welding. The base end portion of the arm may be integrally attached to the joint material by, for example, a fastener such as a screw.

The arm is not limited to that made of a pipe material, and may be a solid columnar or rod-shaped arm.

The base end of the arm does not have to be along the longitudinal direction of the joint material.

The base end portion of the arm may not be fixed to the lower surface of the joint material, or may be fixed to the front surface or the rear surface of the joint material, for example.

Of course, the position of the option body supported by the arm is not limited to the one biased to the left side with respect to the joint material, but may be biased to the right side.

In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

A ... Support B1 ... Seat C ... Tergum D ... Memo stand (optional)
J ... Seat body 3 ... Shell body 4 ... Cushion 5 ... Zhangji 8 ... Top plate (option body 9 ... Arm

Claims (7)

A chair with options attached to the support that supports the seat.
The support is composed of left and right leg components paired to the left and right, and members separate from the left and right leg components, and is a joint material that is interposed between the left and right leg components to connect the two. It is equipped with
The option includes an option body and an arm that supports the option body.
A chair in which the base end portion of the arm is integrally connected to the joint material. The arm is made of pipe material and
The chair according to claim 1, wherein the base end portion is fixed to the lower surface side of the joint material along the longitudinal direction of the joint material. The option main body is arranged on either the left or right side of the joint material.
The chair according to claim 1 or 2, wherein the end portion of the base end portion is arranged on the other side of the joint material. The left and right leg components are extended to a rear leg extending in the vertical direction, a front leg integrally extending from the upper part of the rear leg toward the front side, and a longitudinal intermediate portion of the front leg, respectively. It is provided with a joint portion whose tip portion is connected to the side end portion of the joint material.
The chair according to claim 1, 2 or 3, wherein the arm has a linear portion along the longitudinal direction of the joint portion. The chair according to claim 4, wherein the linear portion and the joint portion are connected to each other via a bracket. The chair according to claim 1, 2, 3, 4 or 5, wherein the option is a memo stand including a top plate that is the option main body and the arm that supports the top plate. The seat can be changed in posture between a posture in which it can be seated on a support and a posture in which it stands upright on a floor surface.
The top plate can change its posture with respect to the arm between a substantially horizontal usage posture and a retracted posture retracted from this usage posture.
6. The sixth aspect of the present invention, wherein the seat is held in the upright posture and the top plate is held in the retracted posture so that the chair can be nested in the front-rear direction with another chair having the same structure. Chair.

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