JP6153313B2 - Chair - Google Patents

Description

  The present invention relates to a chair suitably used for school or office use.

  Conventionally, as this type of chair, a chair is known in which a backrest and an armrest are supported on a support (see, for example, Patent Document 1). In this case, the backrest is generally supported by the support, while the armrest is supported by a region away from the region supporting the backrest of the support.

  However, in the case where the backrest and the armrest are overlapped with each other and supported on the support body, the conventional one is to attach the armrest to the backrest. There was a certain limit for accurate positioning.

JP 2011-244960 A

  The present invention has been made paying attention to the above situation, and it is an object of the present invention to provide a chair in which the backrest and the armrest can be accurately positioned at their intended positions with respect to the support.

  That is, the chair of the present invention has the following configuration.

The chair according to claim 1 is a chair formed by supporting a backrest and an armrest on a support,
A support body having a positioning member, a backrest having a back contact portion that is positioned in direct contact with the positioning member of the support body, and is disposed in a state of being overlapped with the back contact portion of the backrest. Ri Na and and a armrest having a armrest abutment portion which is positioned directly in contact with the positioning member, the positioning member is a fitting, the back contact portion of the backrest is first fastening member wherein together mounted to the mounting part, Ru der to be attached to the fitting by a different second fastening member and the armrest abutment of the armrest the first fastening member by.

According to a second aspect of the present invention, in the configuration according to the first aspect, a gap is provided between the armrest contact portion and the back contact portion.

The chair according to claim 3 is the configuration according to claim 1 or 2, wherein the backrest has a hole into which the positioning member is inserted, and a wall constituting the hole is the back contact. Part.

According to a fourth aspect of the present invention, in the configuration according to the first, second, or third aspect, the back contact portion has a through hole, and the armrest contact portion is positioned through the through hole. A protrusion is provided that contacts the member.

The chair according to claim 5 is the configuration according to claim 1, 2, 3 or 4, wherein the support includes a left and right rear leg and a horizontal member erected between upper ends of the left and right rear legs. The positioning member projects upward from the horizontal member.

  As described above, according to the present invention, it is possible to provide a chair in which the backrest and the armrest can be accurately positioned at their intended positions with respect to the support.

The perspective view which shows one Embodiment of this invention. The side view in the embodiment. The front view in the embodiment. The rear view in the embodiment. The exploded perspective view in the embodiment. The perspective view which shows a back pad and a backrest. The disassembled perspective view for demonstrating a brake mechanism. The exploded perspective view in the embodiment. The schematic sectional drawing for demonstrating the attachment aspect of the backrest and armrest with respect to an attachment component. The partial enlarged rear view in the embodiment. The partial enlarged front view of the backrest.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, the present invention is applied to a chair C that can be nested in the front-rear direction, that is, a chair C that can be stacked in the horizontal direction. As shown in FIG. 2, the chair C is configured so that the seat 2 can be rotated between a use position (U) and a flip-up position (J), and the seat 2 is flipped up (J). It can be nested in the front-rear direction with other chairs having the same structure in the state of being held.

  The chair C is configured by supporting the seat 2, the backrest 3, and the armrest 4 with respect to the support 1, and the back pad 5 as an optional body is detachably attached to the backrest 3. It has become. Further, the chair C includes a horizontal member 15 installed between the upper ends of the left and right rear legs 12, a backrest 3 supported by the horizontal member 15, and a seat 2 supported by the horizontal member 15. As shown in FIG. 4, the left and right rear legs 12 and the horizontal member 15 have a frame structure that forms a gate shape, that is, a U-shape that opens downward in the rear view. Details will be described below.

<Support 1>
The support 1 is mainly composed of a metal member. The support 1 includes left and right front legs 11 having casters 111 at the lower ends, left and right rear legs 12 having casters 121 at the lower ends, and upper portions of the left and right front legs 11 and intermediate portions of the left and right rear legs 12, respectively. The left and right side frames 13 to be connected, the front frame 14 installed between the upper end portions of the left and right front legs 11, and the horizontal member 15 provided between the upper ends of the left and right rear legs 12 are provided. Further, the support 1 is attached as a support frame disposed at positions near the left and right ends of the horizontal member 15 connected to the left and right ends of the horizontal member 15, more specifically, the upper ends of the left and right rear legs 12. A part t, an upper cover e covering the upper side of the horizontal member 15, a lower cover f covering the lower side of the horizontal member 15, and an outer cover g covering the outer sides of the left and right rear legs 12 are provided.

  The front leg 11, the rear leg 12, the side frame 13, and the front frame 14 are each mainly composed of a metal pipe material. The front leg 11 and the side frame 13 are integrally formed by bending a common metal pipe material, and the rear end of the side frame 13 is rigidly connected to a position above the middle part of the rear leg 12 by welding or the like. Has been. On the inner side surface of the rear leg 12, a buffer hitting portion 123 with which another chair having the same structure abuts at the time of nesting is attached. The front frame 14 is rigidly connected to the left and right front legs 11 by welding or the like, and the frame contact portion h1 formed on the lower surface of the seat 2 is in contact with the upper surface of the front frame 14 at the use position (U). It has become.

  The horizontal member 15 has a solid metal square bar shape connecting the upper ends of the left and right rear legs 12 and has a slightly curved shape such that the middle portion is convex rearward. Both end portions of the horizontal member 15 are connected to each other by welding in a state where the both ends of the horizontal member 15 are fitted and positioned in recessed portions 122 that are provided at the upper ends of the left and right rear legs 12 and are recessed in a shape along the shape of the horizontal member 15. . The recessed portion 122 is formed by cutting out the upper end portion of the rear leg 12 formed of a pipe material. The horizontal member 15 includes a through-hole 151 penetrating in the vertical direction through which a back mounting bolt v3 is inserted in the center portion in the longitudinal direction and at the two left and right sides, and the lower cover f with respect to the horizontal member 15 Screw holes 152 are provided.

  The mounting component t supports the backrest 3 and the armrest 4 separately by directly contacting the backrest 3 and the armrest 4 separately, and supports the backrest 3 and the armrest 4 separately. It is a metal plate-like thing having the function to do. The attachment part t includes a back support part projecting upward from the horizontal member 15 and an upper support part t1 serving as an armrest attachment part, and a lower support part t3 serving as a seat attachment part projecting downward from the horizontal member 15. The backrest 3 and the armrest 4 are attached to the upper support portion t1, and the seat 2 is rotatably attached to the lower support portion t3. That is, the attachment part t is integrally provided with an upper support part t1 and a lower support part t3. In other words, the attachment part t includes an intermediate part t2 supported by the horizontal member 15 and an intermediate part t2. An upper support portion t1 extending upward from the portion t2 and a lower support portion t3 extending downward from the intermediate portion t2 are integrally provided by a single metal member.

  The upper support portion t1 is disposed on both left and right ends of the horizontal member 15, that is, on the upper side of the portion close to the left and right rear legs 12 in the horizontal member 15, and supports the backrest 3 and supports the armrest 4. . The upper support portion t1 is a plate-like member that is formed such that the upper end is sharpened, the plane portion is directed left and right, and the end edges are directed front and rear. The upper support portion t1 includes a first screw hole t11 into which the first fastener v1 for attaching the backrest 3 is screwed and a second fastener v2 to which the armrest 4 is attached. Two screw holes t12 are provided. The intermediate part t2 is provided with a square-shaped square hole t21 through which the horizontal member 15 in the form of a square bar penetrates. The two attachment parts t in the present embodiment are fixed to the left and right portions of the horizontal member 15 by welding in a state where the horizontal member 15 is passed through the square hole t21. In addition, since the mounting member t and the horizontal member 15 are welded after the horizontal member 15 having a shape corresponding to the square hole t21 is inserted into the square hole t21, The positioning of the attachment part t is facilitated. The lower support portion t3 is disposed on both left and right ends of the horizontal member 15, that is, below the portion near the left and right rear legs 12 in the horizontal member 15, and supports the seat 2 so as to be rotatable. Is provided with a through hole t31 communicating with the. The through-hole t31 is a round hole and supports the seat 3 with a shaft.

  A brake mechanism b for rotating the seat 2 while maintaining a constant frictional force is provided between the lower support portion t3 and the seat 2 supported by the lower support portion t3. Details will be described later.

  The upper cover e covers the upper side of the horizontal member 15, and includes a flat cover body e1 and a cover attachment portion e2 projecting downward from the cover body e1.

  The cover body e1 is disposed under the backrest 3 and has rectangular windows e11 through which the upper support portion t1 of the attachment part t can pass on both the left and right sides, and protrudes at the lower edge of the backrest 3 A plurality of passage holes e12 through which the provided cylindrical protrusion x1 can pass, a protruding edge e13 protruding from the peripheral portion toward the lower cover f, and the front end of the front and rear wall x5 formed at the lower end of the backrest 3 Is provided with a groove portion e14.

  The cover attachment portion e2 is a pair of front and rear, and includes a claw e21 protruding inward at the tip. The cover attaching portion e2 is provided so as to protrude from both end portions of the cover body e1 toward the horizontal member 15 and is inserted into the gap a between the left and right rear legs 12 and the horizontal member 15 to be horizontally mounted. The front and rear of the material 15 are sandwiched and elastically engaged with the horizontal member 15.

  The lower cover f includes a horizontal member cover part f1 that covers the front and rear surfaces and the lower surface of the horizontal member 15, and a rear leg that is formed continuously from both ends of the horizontal member cover part f1 and covers the inside of the upper end portion of the rear leg 12. And a cover part f2.

  The horizontal member cover part f1 includes a front wall f11 and a rear wall f12 that cover the front and rear surfaces of the horizontal member 15, and a bottom wall f13 that covers the lower surface of the horizontal member 15. The front and rear walls f11 and f12 are recessed portions f111 and f121 into which the protruding edge portion e13 of the upper cover e enters, and a guide piece f112 disposed adjacent to the recessed portions f111 and f121 so as to assist the attachment to the recessed portions f111 and f121. , F122. The guide pieces f112 and f122 are provided intermittently with a certain interval with respect to the front and rear walls f11 and f12, and it is easy to perform the work of fitting the protruding edge e13 of the upper cover e into the recesses f111 and f121 of the lower cover f. It is. The bottom wall f13 has a rectangular window f131 through which the lower support portion t3 of the attachment part t can pass, and a screw insertion hole f132 through which a screw v4 for attaching the lower cover f to the lower surface of the horizontal member 15 is inserted. And.

  The rear leg cover part f2 is formed along the shape of the left and right rear legs 12 having a pipe shape, and has a screw insertion hole f211 protruding from the inner surface toward the rear leg 12 side. The portion f21 is positioned by being fitted into a mounting hole 124 formed in the rear leg 12.

  The left and right outer covers g cover the outer sides near the upper ends of the left and right rear legs 12 and are formed so as to follow the shape of the left and right rear legs 12. The outer cover g has a protruding portion g1 having a screw hole g11 projecting toward the rear leg 12 and is positioned by being fitted into a mounting hole 124 formed in the rear leg 12.

<Seat 2>
The seat 2 is rotatably supported by the lower support portion t3 of the attachment component t. The seat 2 includes a seat body 21 and a cushion 22 disposed on the seat body 21. The seat body 21 includes an inner shell 211 formed of resin, an outer shell 212 formed of resin and attached to the outside of the inner shell 211, a metal support arm 213 attached to the outer shell 212, The left and right lower covers 214 are provided below the support arm 213 and are attached to the outer shell 212 so as to cover and hide the support arm 213.

  The inner shell 211 is disposed on the outer shell 212 and has a dish shape with a central portion slightly recessed downward. The inner shell 211 has a shape in which a front end portion hangs downward, and a rear end portion has an arc shape.

  The outer shell 212 includes a frame abutting portion h1 provided on the lower surface, on which the front frame 14 of the support 1 can abut, left and right projecting portions h2 projecting upward from both ends of the rear portion, and a base end portion of the supporting arm 213. Includes a support arm attachment portion (not shown) attached by a bolt (not shown). The left and right protrusions h2 are provided with slits h21 through which the lower support part t3 of the attachment part t can be inserted at the tip part.

  The support arm 213 is formed by bending a metal plate, the tip portion is pivotally attached to the lower support portion t3 of the attachment component t, and the base end portion is attached to a support arm attachment portion (not shown) of the outer shell 212 with a bolt. It has been. The distal end side of the support arm 213 is disposed in the protruding portion h2 of the outer shell 212. The support arm 213 includes a rectangular columnar angular axis j having a screw hole j1 and protruding inward.

  The cushion 22 is a normal one in which an upholstery is stretched on the outer surface of a cushioning sponge material. The cushion 22 is positioned on the inner shell 211, and has a tip portion that hangs downward like the inner shell 211 and a rear end portion that has an arc shape. The upholstery of the cushion 22 wraps around the peripheral edge portion of the inner shell 211 attached to the lower surface of the cushion 22 and is integrally tightened. Between the seat 2 provided with the cushion 22 and the support body 1, a brake mechanism b for rotating the seat 2 with respect to the support body 1 while maintaining a constant frictional force is provided.

  As shown in FIG. 7, the brake mechanism b has a support arm 213 and a resin-made first brake member that has a round hole b <b> 11 through which the angular axis j of the support arm 213 is inserted and is attached to the support arm 213. b1, a through hole t31 having a round hole shape through which the angular axis j is inserted, a lower support portion t3 attached to the first brake member b1, and a round hole b21 through which the angular axis j is inserted. The resin-made second brake member b2 attached to the support portion t3 and the square hole b31 formed to have a dimension substantially matching the dimension of the inserted angular axis j are attached to the second brake member b2. And a screw b4 having a screw head b41 attached to the rotary plate b3 and screwed into the screw hole j1 of the angular axis j.

  When the support arm 213 of the seat 2 is rotated with respect to the lower support portion t3 of the support body 1, the first brake member b1 is turned to the support arm 213 and the lower support portion t3 in a state of being rotatable with respect to the angular axis j. The second brake member b2 is slidably contacted with the lower support portion t3 and the rotating plate b3 in a state where the second brake member b2 is rotatable with respect to the angular axis j and exhibits a certain braking force. On the other hand, since the screw head b41 of the screw b4 screwed to the angular axis j is in contact with the rotating plate b3 that rotates integrally with the angular axis j, the screw b4 and the rotating plate b3 rotate relatively. This is prohibited, and the screw b4 is restrained from loosening as the seat 3 is rotated. The braking force can be adjusted by the degree of screwing of the screw b4, that is, the tightening degree.

  Further, as shown in FIG. 2, the seat 2 has a thickness dimension on the rear side larger than that on the front side. For this reason, in the chair C which comprised the seat 2 so that rotation was possible between a use position (U) and a flip-up position (J), the rear part of the seat 2 which is a part corresponding to a seating position of a seated person is strengthened. It can be made excellent. For this reason, it is possible to provide a hold feeling that contributes to safety at the time of sitting for the seated person. Further, by setting the thickness dimension of the seat 2 in this way, the degree of freedom in design for improving the sitting comfort of the seated person, such as making the thickness of the rear side of the cushion 22 thicker than that of the front side, is increased. It is.

  The thickness dimension in the vicinity of the rear edge of the seat 2 is set to be thicker than the front side of the seat 2 and is located on the side close to the backrest 3. Thus, when the chair C shown in the present embodiment is nested from the rear with respect to another chair having the same shape, the vicinity of the rear edge of the seat 2 covers the horizontal member 15 of the other chair C. The upper cover e or the backrest 3 is designed so as not to hit the lower end edge of the peripheral edge x. By doing in this way, it is avoided that members collide with each other with nesting to cause damage and the like, and contribute to smooth and efficient nesting.

  The attachment part t is located slightly inward from the left and right ends of the horizontal member 15, that is, the positions of the left and right rear legs 12. The seat 2 that is rotatably attached to a portion of the attachment part t that protrudes below the horizontal member 15 is suspended and supported on the lower side of the horizontal member 15. More specifically, in the present embodiment, the seat 2 is pivotally attached to a lower support portion t <b> 3 that protrudes below the horizontal member 15.

<Backrest 3>
The backrest 3 is made of resin having a plurality of long holes y1, has a curved shape so that the central portion bulges back in plan view, and the central portion closer to the lower portion in side view It has a U-shape that is curved so as to be convex toward the front. In the present embodiment, the backrest 3 is arranged so as to be placed on the horizontal member 15 of the support 1. The backrest 3 includes a peripheral portion x and an intermediate portion y surrounded by the peripheral portion x and having a long hole y1.

  The peripheral portion x surrounds the intermediate portion y formed in a mesh shape, and is formed so that the thickness dimension increases as it goes downward. The peripheral edge x includes a plurality of protrusions x1 formed at the lower end edge and protruding downward at intervals, and a hole x2 provided at both ends of the lower end edge and into which the upper support part t1 of the attachment part t is inserted. A back contact portion x3 constituted by a wall x22 constituting the hole x2 and positioned by directly contacting the upper support portion t1, and an outwardly opened recess portion x4 formed at the lower portion of the side edge. And a front and rear wall x5 formed to extend in the left-right direction on the front side and the rear side at the lower end of the backrest 3. The front ends of the front and rear walls x5 are fitted in the groove e14 of the upper cover e.

  The protrusion x1 has a cylindrical shape and is arranged so that the tip can be attached to the upper surface of the horizontal member 15 through the passage hole e12 of the upper cover e. A screw hole x11 is formed in the projecting portion x1 arranged in the middle and the left and right sides of the plurality of projecting portions x1, and the backrest mounting bolt v3 inserted from the lower surface side of the horizontal member 15 is used. It is attached to the horizontal member 15.

  The attachment part t is located slightly inward from the left and right ends of the horizontal member 15, that is, the positions of the left and right rear legs 12. Then, the backrest 3 attached to the portion of the attachment part t protruding above the horizontal member 15 is placed on the horizontal member 15 so as to be placed on the horizontal member 15. It is inserted to the position where it contacts. More specifically, in the present embodiment, the backrest 3 is moved downward so that the backrest 3 is placed on the upper cover e that covers the horizontal member 15, so that the inside of the hole x <b> 2. The upper support portion t1 of the attachment part t is inserted, and the lower edge is brought into contact with the upper cover e.

  The hole x2 has an opening k at the lower end and forms a space in which the upper support portion t1 is inserted by the inner wall x21, the outer wall x22, and the front and rear walls x23, x24.

  The back contact portion x3 is mainly composed of an outer wall x22 constituting the hole x2, and through holes x31 penetrating in the left-right direction through which the projections 422 of the armrest contact portion 42 can pass are provided in two places, upper and lower. In addition, a through hole x32 through which the first fastener v1 passes is provided on the through holes x31.

  The recessed part x4 is recessed outwardly at the lower part of the left and right side edges of the peripheral part x, and includes front and rear walls x41 and x42 and a bottom wall x43 connecting the front and rear walls x41 and x42. The bottom wall x43 is formed by an outer wall x22 constituting the hole x2. In this recessed portion x4, an armrest abutting portion 42 of an armrest 4, which will be described later, is arranged with a predetermined gap s. That is, the armrest 4 is arranged in the recessed portion x4 in a state where it does not contact the backrest 3. In addition, when the armrest 4 is not attached to the support body 1, the recessed part x4 is obstruct | occluded by the backrest side edge cover (not shown).

  The back contact portion x3 of the backrest 3 is attached to the upper support portion t1 inserted into the hole x2 by the first fastening tool v1 that has passed through the passage hole x32. In addition, the armrest contact portion 42 of the armrest 4 to be described later is attached to the upper support portion t1 inserted into the hole x2 by a second fastener v2 different from the first fastener v1. ing.

  The intermediate portion y is made of synthetic resin, and includes a long hole row yf in which a plurality of long holes y1 extending in the vertical direction are arranged in the vertical direction with the left and right positions aligned, and the plurality of long hole rows yf are spaced apart in the horizontal direction. It has a resin mesh structure that is open and arranged. The intermediate part y forming the resin mesh structure is formed to have substantially the same thickness dimension. The long hole rows yf adjacent to the left and right are arranged so as to be relatively shifted up and down by a dimension corresponding to half of the vertical hole arrangement pitch in the vertical direction. On both sides, there are respectively provided linear bodies sj made of synthetic resin that bend and meander regularly. The upper edge portion and the lower edge portion of the peripheral edge portion x are integrally connected by the plurality of linear bodies sj.

  The backrest 3 is formed so that the thickness dimension increases as the peripheral part x moves downward, and the intermediate part y is formed to have substantially the same thickness dimension. A recessed portion is formed by the peripheral edge portion x and the intermediate portion y. That is, the peripheral portion x is set so as to gradually increase as it goes downward, and the intermediate portion y is provided so as to be flush with the front surface of the peripheral portion x.

  Hereinafter, the intermediate part y of the backrest will be described in more detail with reference to FIG.

  The long hole y1 extends vertically, and has a wide portion y11 having a uniform width portion y111 extending in the longitudinal direction, and a narrow portion extending in the longitudinal direction and having a substantially uniform width continuously above and below the wide portion y11. y12. The wide part y11 includes a uniform width part y111 extending vertically and a gradually narrow part y112 formed so that the width dimension gradually decreases from the upper and lower ends of the uniform width part y111 and continuing to the narrow part y12. Yes.

  The intermediate portion y is a bent band that is bent left and right between one elongated hole y1 and another elongated hole y1 ′ (see FIG. 11) that is provided on the side of the elongated hole with a vertical position shifted. There is provided a first band member y2 having a part y21 and a straight band part y22 extending vertically from the end of the bent band part y21. In addition, a plurality of long holes y1 are formed in the middle part y at intervals in the vertical direction, and a second belt member y3 that forms a belt shape between the long holes y1 is provided. The first band member y2 and the second band member y3 are set to the same thickness dimension. Thus, the intermediate portion y includes a linear body sj formed by connecting a plurality of first band members y2 vertically on both sides of the plurality of long holes y1. The intermediate portion y forms a mesh structure with the striated body sj and the second band member y3 that connects the other striated bodies sj adjacent to the striated body sj.

  In this embodiment, the second belt member y3 and the four straight belt portions y22 connected to the second belt member y3 are formed in a substantially H shape in front view to receive the seated person's load. Part at. The hit portion at has a function of positively receiving the load of the seated person and provides the seated person with a sense of security when sitting.

  Further, in this embodiment, the contact portion at and the mesh structure constituted by the first and second belt members y2 and y3 are gently continuous to form a backrest 3 curved surface and a backrest 3 plane. It has become. For this reason, the backrest 3 follows the seated person's back and induces elastic deformation suitably, can provide the seated person with a good fit, and can give the seated person a sense of security when seated. It has come to offer.

  Each linear body sj is obtained by continuously connecting a plurality of first band members y2 in the vertical direction. The strips sj adjacent to the left and right are connected by the plurality of second band members y2 described above to form a mesh structure.

  In the vicinity of each second belt member y3, there are a plurality of contact portions at which the second belt member y3 and the right and left linear members sj connected by the second belt member y3 form an H shape in front view are vertically and horizontally Are scattered at a predetermined pitch.

  The backrest 3 having the above configuration includes a wide portion y11 having a uniform width portion y111, and a narrow portion y12 formed adjacent to the wide portion y11 and having a shorter width than the uniform width portion y111. Therefore, when the backrest 3 is viewed from the front, the rear portion of the chair C is visually recognized through the long hole y1 (see, for example, FIGS. 3 and 4), while the backrest 3 is at a certain angle. When viewed obliquely, only the narrow portion y12 blocks the light from the rear portion of the chair C, and the rear portion of the chair C is not visually recognized through the narrow portion y12 (for example, FIG. 5). And FIG. 6). That is, the backrest 3 of this embodiment changes its expression depending on the viewing angle. More specifically, the backrest 3 of the present embodiment has a viewing state in which the rear portion of the chair C can be viewed through both the wide portion y11 and the narrow portion y12 of the long hole 1 by changing the viewing angle. In addition, the wide portion y11 and the narrow portion y12 form a partially visible state in which the rear portion of the chair C is made visible through the wide portion y11 of the long hole y1 and the rear portion of the chair C is invisible from the narrow portion y12. It can be selectively adopted by the adjacent structure.

<Armrest 4>
The armrest 4 includes an armrest main body 41 having an armrest 411 and an armrest abutting portion 42 arranged at the base end of the armrest main body 41, and is integrally formed of resin. The armrest main body 41 extends in the front-rear direction. The edge on the distal end side has a rounded shape, and the proximal end side is connected to an armrest abutting portion 42 that extends vertically. As schematically shown in FIG. 9, the armrest abutting portion 42 is arranged in a state where it overlaps with the back abutting portion x <b> 3 of the backrest 3 in the front view and directly abuts on the upper support portion t <b> 1. Specifically, the armrest abutting portion 42 has a plate-like armrest abutting portion main body 421 having a sharp upper end, and projects from the armrest abutting portion main body 421 toward the backrest 3 side through the through hole x31. A protrusion 422 that contacts the upper support portion t1 is provided, and the protrusion 422 is positioned so as to directly contact the upper support portion t1. That is, the armrest 4 of the present embodiment is supported by being in direct contact with the upper support portion t1 of the support 1. In the armrest abutting portion 42, through holes 423 for inserting bolts drilled in the left-right direction are formed at two locations corresponding to the protrusions 422, and the tips of the protrusions 422 are in contact with the upper support portion t1. In this state, it is attached to the upper support portion t1 by the second fastener v2. Since the armrest 4 is attached in direct contact with the upper support portion t1, the armrest 4 can be attached to an intended position.

<Back pad 5>
The back pad 5 is detachably attached to a resin backrest 3 having a plurality of holes, that is, long holes y1 in the intermediate portion y. The back pad 5 is for imparting cushioning properties to the seated person.

  The back pad 5 includes a back pad main body 51 that covers the front side of the backrest 3, a hook portion 52 that engages with the long hole y <b> 1 by sliding with respect to the backrest 3, and the hook portion 52 is related to the long hole y <b> 1. At the same stage, there is provided detent means 53 for detenting by engaging with another long hole y1 different from the long hole y1 with which the hook 52 is engaged.

  The long hole y1 formed in the backrest 3 includes a wide portion y11 through which the hook portion 52 can be inserted, and a narrow portion y12 formed above and below the wide portion y11 and having a space narrower than the wide portion y11. The hook 52 is engaged with the narrow portion y12.

  The back pad main body 51 has an area that covers the intermediate portion x of the backrest 3 from the front side, has a plate shape and is attached to the backrest 3, and a cushion integrally attached to the plate material 511. 512. In the present embodiment, a hook portion 52 and a detent means 53 are provided so as to protrude from the rear surface of the plate material 511, and the plate material 511, the hook portion 52, and the detent means 53 are integrally formed of resin. The cushion 512 of the back pad main body 51 has an upholstery on the outer surface.

  The hook portion 52 protrudes rearward from the back pad main body 51, and includes a quadrangular columnar protruding member 521 having a base end connected to the back pad main body 51, and a retaining disc provided at the distal end of the protruding member 521. And a head member 522 having a shape. The protruding member 521 is formed in a plate shape in which the left and right widths are shorter than the vertical width, and the left and right widths are substantially matched to the width dimension of the narrow portion y12. Both side surfaces and the lower surface of the projecting member 521 are respectively engaged with the straight belt portion y22 and the second belt member y3 that form the narrow portion y below the wide portion y11. The head member 522 has a left-right width dimension larger than the width dimension of the narrow portion y12. The separation dimension between the head member 522 and the back pad main body 51 is set to be substantially the same as the thickness dimension of the intermediate part y of the backrest 3, that is, the thickness dimension of the straight belt part y22 and the second belt member y3. Yes. In other words, the protruding member 521 is a left / right movement restricting means that restricts the movement in the left / right direction with respect to the backrest 3 while restricting the movement in the lower direction with the protrusion member 521 attached to the backrest 3. This is a forward / backward movement restricting means for restricting movement in the front / rear direction with respect to the backrest 3.

  The detent means 53 inserts the hook portion 52 into the wide portion y11 of the long hole y1 and slides it downward, and engages the hook portion 52 with the periphery of the narrow portion y12 of the long hole y1. In this way, the upper detent is stopped. The detent means 53 protrudes from the back pad main body 51, and is inserted into the wide portion y11 of the long hole y1 when the hook portion 52 is engaged with the periphery of the narrow portion y12. It is the protrusion formed so that it might fit.

  That is, the detent means 53 includes a first plate-shaped first protrusion 531 having a base end connected to the back pad main body 51, and a plate-shaped detent 532 extending from the tip of the protrusion 531 to the left and right. And a columnar second protrusion 533 that is arranged at both upper and lower ends of the protrusion 531 and is connected to the end of the detent 531. The first projecting portion 531 and the detent portion 532 constituting the detent means 53 form an arrow shape with a sharpened tip. That is, the detent portion 532 has a guide inclined surface 532a, and is formed in a shape that allows easy passage when pushed toward the wide portion y11 of the long hole y1. On the other hand, the detent portion 532 is provided with a hook portion 532b at the end, and after passing through the wide portion y11, the hook portion 532b is engaged with the periphery of the wide portion y11 to exhibit a retaining function. Yes. The second projecting portion 533 is arranged on the gradually narrowing portion y112 of the wide portion y11 in a state of being attached to the backrest 3, and has a cylindrical shape having a diameter larger than the width dimension of the narrow portion y12. is there. The detent means 53 also serves as a vertical movement restricting means for restricting the vertical movement relative to the backrest 3 together with the retaining means.

  As described above, the chair C according to the present embodiment is formed by supporting the backrest 3 and the armrest 4 on the support body 1. Thus, the mounting part t which is a positioning member, more specifically, the support body 1 having the upper support portion t1, and the back contact which is positioned by directly contacting the upper support portion t1 of the support body 1. A backrest 3 having a portion x3, and an armrest 4 having an armrest abutting portion 42 which is arranged in a state of being overlapped with the back abutting portion x3 of the backrest 3 and is positioned in direct contact with the upper support portion t1. It comprises. For this reason, the backrest 3 and the armrest 4 can each be accurately positioned at an intended position with respect to the support 1.

  Moreover, although the back contact portion x3 of the backrest 3 and the armrest contact portion 42 of the armrest 4 overlap with the upper support portion t1, the backrest 3 and the armrest 4 are respectively connected. Since it is configured to directly contact the upper support portion t1, even if the backrest 3 and the armrest 4 are arranged so as to overlap with the upper support portion t1, each of them is located. It can be accurately positioned at the initial position.

  The back contact portion x3 of the backrest 3 is attached to the upper support portion t1 by the first fastening device v1, and the armrest contact portion 42 of the armrest 4 is different from the first fastening device v1. Therefore, the backrest 3 and the armrest 4 can be accurately fixed at the intended positions with respect to the support body 1, respectively. Yes.

  Since the gap s is positively provided between the armrest abutting portion 42 and the back abutting portion x3, the armrest 4 can be easily placed at a predetermined position of the upper support portion t1 without being affected by variations in parts. It can be attached. That is, from the state in which the backrest 3 is directly attached to the upper support portion t1 by the first fastener v1, the armrest contact portion 42 and the back contact portion x3 of the armrest 4 are adjacent to each other through the gap s. In the aspect, the projection 422 of the armrest abutting portion 42 is directly abutted on the upper support portion t1 and is attached by the second fastening device v2, so that the armrest 4 is easily supported by the backrest 3 through the backrest 3. It can be attached to the portion t1. In other words, since the gap s is formed between the back contact portion x3 and the armrest contact portion 42, the attachment and detachment of the armrest 4 are not affected by the shape of the backrest 3. Can be done. For example, even if the second fastener v2 is screwed from the side surface side of the backrest 3 and the armrest contact portion 42 is attached to the support 1, the armrest contact portion 42 sinks into the backrest 3. Conversely, the position of the armrest abutting portion 42 with respect to the backrest 3 does not protrude beyond the intended position.

  Since a gap s is formed between the back contact portion x3 and the armrest contact portion 42, the armrest 4 can be attached to the support body 1 without touching the backrest 3, and the backrest 3 and the armrest Even if a minute dimensional error occurs in the arm 4, the armrest 4 can be appropriately attached to the intended position.

  The backrest 3 has a hole x2 into which the upper support portion t1 is inserted, and the wall constituting the hole x2, that is, the outer wall x22, constitutes the back contact portion x3. Therefore, the hole x2 A structure in which the backrest 3 is supported by the support body 1 can be realized by attaching the upper support portion t1 inserted through the back portion and the back contact portion x3.

  Moreover, since the outer wall x22 forming the hole x2 constitutes the back contact portion x3, the upper support portion t1 and the back contact portion x3 can be attached from the outside of the backrest 3, Assembling work between the backrest 3 and the support 1 using the first fastener v1 can be easily performed.

  The back contact portion x3 has a through hole x31, and the armrest contact portion 42 has a protrusion 422 that contacts the upper support portion t1 through the through hole x31. Therefore, the armrest 4 can be attached to the support 1.

  By passing the projection 422 of the armrest abutting portion 42 through the through hole x31, the projection 422 comes into contact with the upper support portion t, so that the projection 422 is guided by the through hole x31 during attachment. It is guided to a predetermined position of the upper support part t1.

  Through holes x31 are formed at two locations on the back contact portion x3, and a plurality of projections 422 of the armrest contact portion 42 are provided so as to pass through the two through holes x31. Since it is attached in direct contact with the upper support portion t1, the armrest 4 can be stopped at two points with respect to the upper support portion t1, and the occurrence of rattling can be suppressed.

  The support 1 includes left and right rear legs 12 and a horizontal member 15 installed between the upper ends of the left and right rear legs 12, and an upper support part t1 projects upward from the horizontal member 15. Therefore, it is possible to realize a structure in which the backrest 3 and the armrest 4 can be reasonably attached to the upper support portion t1. That is, since the upper support portion t1 is projected upward, if the hole x2 of the backrest 3 is formed along the shape of the backrest 3 extending in the vertical direction, the upper support portion t1 extends in the protruding direction of the upper support portion t1. Corresponding rational shape can be achieved. Furthermore, since the hole x2 extending in the vertical direction is formed at the lower end of the backrest 3 extending in the vertical direction, the bottom portion of the hole x2 in the backrest 3 where the tip of the upper support portion t1 can abut is inside the backrest 3. Therefore, the backrest 3 can be stably supported with respect to the upper support portion t1.

  Since the upper support portion t1 protrudes upward, the armrest contact portion 42 of the armrest 4 can be formed in a vertically long shape corresponding to the protruding direction of the upper support portion t1, and the armrest contact portion The load of the seated person abutting on the main body 421 can be efficiently transmitted to the upper support part t1 through the armrest abutting part 42 formed in a vertically long shape.

  Since the horizontal member 15 is installed between the upper end portions of the left and right rear legs 12, for example, compared to a conventional one in which the left and right upper end portions of the rear legs are connected to the backrest or the like. Since 12 is stabilized at an intended place, the support body 1 is excellent in the degree of freedom of design for strengthening the entire support 1. In particular, in the present embodiment, the left and right rear legs 12 and the horizontal member 15 form a gate-shaped frame structure in the rear view, and thus have a unique appearance, Thus, it is possible to provide a structure with excellent rigidity for supporting the rear leg 12.

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

  The positioning member may have various shapes, and is not limited to the blade-like one shown in the present embodiment.

  As long as the backrest is positioned by the positioning member, the backrest may not be attached to the positioning member. That is, the backrest may be positioned by directly contacting the positioning member, and the backrest may be attached to the support by various means at a portion different from the positioning member in the support.

  The armrest only needs to be positioned by the positioning member, and may not be attached to the positioning member. That is, the armrest may be positioned by directly contacting the positioning member, and the armrest may be attached to the support by various means at a portion different from the positioning member in the support.

  The clearance provided between the armrest contact portion and the back contact portion, that is, the width of the clearance can be set to various dimensions.

  The chair is not limited to a chair capable of nesting between a use position and a flip-up position as shown in the present embodiment.

  The chair may not have a back pad.

  The upper support portion and the lower support portion are not limited to those integrally formed as attachment parts as shown in the present embodiment. For example, the upper support portion and the lower support portion may be separately formed as separate members, and each may be fixed to the horizontal member.

  The upper support portion and the lower support portion are not limited to those fixed to the horizontal member by welding as shown in the present embodiment, and may be fixed by other means such as screws. And an upper support part and a lower support part may be integrally formed with respect to the horizontal member.

  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.

DESCRIPTION OF SYMBOLS 1 ... Support body 2 ... Seat 3 ... Backrest 4 ... Armrest 5 ... Back pad (optional body)
12 ... Rear leg 15 ... Horizontal member C ... Chair t ... Mounting part y ... Middle part y1 ... Long hole

Claims (5)

A chair having a back support and an armrest supported on a support;
A support body having a positioning member, a backrest having a back contact portion that is positioned in direct contact with the positioning member of the support body, and is disposed in a state of being overlapped with the back contact portion of the backrest. Ri Na and and a armrest having a armrest abutment portion which is positioned directly in contact with the positioning member,
The positioning member is an attachment component, the back contact portion of the backrest is attached to the attachment component by a first fastener, and the armrest contact portion of the armrest is the first fastener. chair, characterized in der Rukoto to be attached to the fitting by a different second fastening member is a. The chair according to claim 1, wherein a gap is provided between the armrest contact portion and the back contact portion. The chair according to claim 1 or 2, wherein the backrest has a hole into which the positioning member is inserted, and a wall constituting the hole constitutes the back contact portion. The chair according to claim 1, 2 or 3, wherein the back abutting portion has a through hole, and the armrest abutting portion includes a protrusion that abuts the positioning member through the through hole. . The support body includes left and right rear legs and a horizontal member laid between the upper ends of the left and right rear legs, and the positioning member protrudes upward from the horizontal member. The chair according to claim 1, 2, 3, or 4.

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