JP2019063202A - Chair - Google Patents

Abstract

To provide a chair with an excellent design flexibility, capable of providing optimal external appearance without complicating the structure.SOLUTION: The chair causes a support frame to support a seat E and a backrest, where the backrest includes a back plate L formed of a synthetic resin, the back plate L is fixed to the support frame by backrest fixings v5, and the backrest fittings v5 is invisible when being viewed from an upper side. This configuration can provide the chair with excellent design flexibility, capable of providing optimal external appearance without complicating the structure.SELECTED DRAWING: Figure 18

Description

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

  There are conventionally known various chairs in which a seat and a backrest are supported by a support frame mainly composed of a metal pipe material (see, for example, Patent Document 1).

  By the way, in this type of chair, when the seat and the backrest are in contact with or close to each other, the backrest is usually attached after the seat is supported by the support frame .

  However, in such a case, a screw for attaching the backrest to the support frame is easily exposed to the outside, which causes a loss in appearance.

  The above circumstances are not limited to screws, and the same applies to backrest fasteners other than screws.

Unexamined-Japanese-Patent No. 11-309041

  The present invention has been made in view of the above circumstances, and at least to provide a chair with an excellent degree of freedom in design that can provide a suitable appearance without causing complication of the structure. .

  That is, the present invention has the following configuration.

  The invention according to claim 1 is a chair having a support frame supporting a seat and a backrest, wherein the backrest includes a back plate formed of a synthetic resin, and the back plate is the above-mentioned back plate. It is a chair which is fastened by a backrest fastening tool to the support frame, and the backrest fastening tool is not visible when viewed from above.

  The invention according to claim 2 is the chair according to claim 1, wherein the seat conceals the backrest fastening.

  The invention according to claim 3 is that, in the back plate, the frame portion extending in the front-rear direction constituting the support frame, the frame portion extending in the left-right direction, or the frame portion extending in the vertical direction. It is a chair of Claim 1 or 2 fixed by a backrest fixing tool.

  The invention according to claim 4 is that the support frame includes a horizontal support frame portion that connects the left and right leg elements, and the back plate is the horizontal support frame by the backrest attachment. The chair according to any one of claims 1 to 3, which is fixed to a part.

  The invention according to claim 5 is that the seat is provided with a seat frame and a tensioned place stretched in the seat frame, and the seat frame has the backrest fastening device from the upper side. The chair according to claim 1, 2, 3 or 4 which can be covered.

  In the invention according to claim 6, a base frame portion in which the support frames are paired in left and right and extended in the front and back direction, a front leg frame portion erected at a front end portion of these base frame portions, and the base frame Rear leg frame portion erected at the rear end portion of the rear portion, a side seat receiving frame portion bridged between the upper end of the front leg frame portion and the upper end of the rear leg frame portion, and a front end of the side seat receiving frame portion A front horizontal frame portion connecting the parts, a rear horizontal frame portion connecting the rear ends of the side seat receiving frame portions, and a back support frame portion extending upward from the upper end of the rear leg frame portion The seat frame is disposed on the side seat receiving frame portion, the front transverse frame portion, and the rear transverse frame portion, and the back plate is The support frame is externally fitted to the support frame A chair according to claim 5, characterized in that the lifting.

  The invention according to claim 7 is that the back plate includes a main body portion having a backrest surface and left and right extending portions protruding downward from the main body portion. The chair according to any one of claims 1, 2, 3, 4, 5 or 6, wherein the extension portion is formed with a fastening tool insertion hole through which the backrest fastening tool can be inserted.

  According to an eighth aspect of the present invention, the back plate includes a main body having a backrest surface and left and right extending portions protruding downward from the main body. The extension portion is provided with projecting portions protruding in the front or left and right direction, respectively, and a fastening tool insertion hole through which the backrest fastening tool can be inserted is formed in these projecting portions, 8. A chair according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the seat covers the projection.

  The invention according to claim 9 is a chair in which a seat and a backrest are supported by a support frame, and a part of the seat is disposed on a member constituting the backrest, It is a chair which attaches the seat to the support frame after attaching the backrest to the support frame.

  As described above, according to the present invention, it is possible to provide a chair with an excellent degree of freedom in design that can provide a suitable appearance without causing complication of the structure.

1 is a perspective view showing an embodiment of the present invention. The perspective view in the embodiment. The front view in the embodiment. The rear view in the embodiment. The right view in the embodiment. The top view in the embodiment. The bottom view in the embodiment. XX sectional drawing in FIG. FIG. 9 is a partial enlarged cross-sectional view in FIG. The disassembled perspective view in the embodiment. The disassembled perspective view in the embodiment. The perspective view in the embodiment. The bottom view in the embodiment. The right view in the embodiment. The enlarged view for description of the spacer in the embodiment. The perspective view for description of the spacer in the embodiment. The disassembled perspective view in the embodiment. The disassembled perspective view in the embodiment. The front view of the backrest (backboard) in the embodiment. The Y part enlarged view in FIG.

  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 A suitably used in an office, a conference room, an educational facility or the like. This chair A is configured to be able to stack other chairs A having the same shape in the vertical direction, as shown in FIGS.

  In the chair A, the support frame B supports the seat E and the support frame B supports the backrest F. At the lower end of the support frame B, a front spacer C and a rear spacer D, which are spacers located between the support frame B and the floor in use, are provided.

  The support frame B is a pair of right and left base frame portions g1 extending in a longitudinal direction substantially in parallel with the floor surface, a front leg frame portion g2 erected at the front end portion of the base frame portion g1, and a base frame portion g1. Rear leg frame portion g3 erected at the rear end portion of the rear leg portion, a side seat receiving frame portion g4 provided between the upper end portion of the front leg frame portion g2 and the upper end portion of the rear leg frame portion g3, and a side seat receiving frame portion From the front horizontal frame portion H connecting the front ends of g4 to the rear horizontal frame portion I serving as the horizontal frame portion connecting the rear ends of the side seat receiving frame portion g4 and the upper end of the rear leg frame g3 An outer back support frame portion J which is a back support frame portion extended upward, and an inner back support frame extended upward along the outer back support frame portion J from a rear end portion of the side seat receiving frame portion g4. And a part K.

  The outer back support frame J, the back leg frame g3, the base frame g1, the front leg frame g2, the side seat support frame g4, and the inner back support frame K are in this order one metal pipe It is continuously formed of wood. In other words, the support frame B includes the outer back support frame J, the rear leg frame g3, the base frame g1, the front leg frame g2, the side seat support frame g4, and the inner back support frame K integrally. It is provided.

  The rear leg frame portion g3, the base frame portion g1, the front leg frame portion g2 and the side seat support frame portion g4 arranged in pairs on the left and right sides constitute a left leg element G and a right leg element G ing. The front horizontal frame portion H connecting the left and right leg elements G and the rear horizontal frame portion I are formed of metal plates.

  A front spacer C, which is a spacer, is attached to the lower surface of the front end portion of the base frame portion g1 by a screw v1. A rear spacer D is attached to the lower surface of the rear end portion of the base frame portion g1 by a screw v2.

  The separation distance of the front leg frame portion g2 arranged in pairs on the left and right is a rear leg arranged in pairs on the left and right to enable stacking with other chairs A having the same shape. It is set shorter than the separation distance of the frame portion g3. The front leg frame portion g2 is connected vertically from the upper end of the lower front leg frame portion g21 which is continuously provided from the front end portion of the base frame portion g1 and extends in an inclined manner in a front view, And an extended upper front leg frame portion g22.

  The side seat support frame portion g4 has a shape that can be attached to the lower surface of the side seat frame portion 11 in the seat E to support the seat E. The side seat receiving frame portion g4 has a gentle S-shape in a side view. The side seat support frame portion g4 includes, in order from the front, a first front tilting frame portion g41, a rear tilting frame portion g42, and a second front tilting frame portion g43.

  The first forward inclined frame portion g <b> 41 can be attached to the lower surface of the first forward inclined portion 111 of the side seat frame portion 11 in the seat frame 1. The rearward inclined frame portion g42 can be attached to the lower surface of the rearward inclined portion 112 of the side seat frame portion 11 of the seat frame 1. The second forward inclined frame portion g <b> 43 can be attached to the lower surface of the second forward inclined portion 113 of the side seat frame portion 11 in the seat frame 1.

  The front horizontal frame portion H is formed of a metal plate whose middle portion in the left-right direction is formed in an upward U-shape, and is fitted to the lower surface side of the front seat frame portion 12 of the seat frame 1 12 can be supported from below. The front horizontal frame portion H has a screw insertion hole h1 in the vicinity of the left and right ends thereof through which a screw v3 for fixing the seat frame 1 can be inserted. The left and right ends of the front horizontal frame portion H are attached to the front end portion of the side seat receiving frame portion g4 by welding.

  The rear cross frame portion I can support the rear seat frame portion 13 of the seat frame 1 from the lower side. The rear cross frame portion I connects the rear end portions of the left and right side seat receiving frame portions g4. The rear cross support frame portion I has a curved shape so as to be convex toward the rear in a plan view or a bottom view. The rear horizontal frame portion I has an upper and lower surface and is inclined forward, and a rear horizontal frame portion main body i1 and an upright frame portion i2 integrally erected from the rear end edge of the rear horizontal frame portion main body i1. And have.

  The rear horizontal support frame portion main body i1 has screw insertion holes i11 penetrating in the vertical direction in the vicinity of the left and right end portions thereof, into which screws v4 for fixing the seat frame 1 can be inserted. The upright frame portion i2 has, in the vicinity of the left and right end portions thereof, screw insertion holes i22 penetrating in the front-rear direction through which the screws v5 serving as a backrest fixing tool for fixing the back plate L can be inserted. The screw insertion hole i22 of the standing frame portion i2 is provided in a convex portion i21 which protrudes upward in the vicinity of the left and right end portions of the standing frame portion i2. The left and right ends of the rear cross frame portion I are attached to the rear end portion of the side seat receiving frame portion g4 by welding.

  The front spacer C and the rear spacer D are for stably supporting the support frame B supporting the seat E and the backrest F against the floor surface. The front spacer C and the rear spacer D are block-like members made of synthetic resin. The front spacers C and the outer side surfaces c3 and d3 of the rear spacers D have a substantially trapezoidal shape and are flush with each other in a side view. The maximum width dimension of the front spacer C and the rear spacer D is set to be larger than the width dimension of the base frame portion g1 and not more than 1.2 times the width dimension of the base frame portion g1.

  The front spacer C has a floor abutment surface c2 that can abut on the floor in use. The front spacer C is attached to the front of the base frame portion g1 in the support frame B by a screw v1. The front spacer C has a recess c1 on the inner surface side of the front end. The front spacer C is provided with a screw insertion hole c4 penetrating in the vertical direction.

  The floor contact surface c2 forms the lower surface of the front spacer C. The floor contact surface c2 is located in front of the main contact surface component c21 provided at the rear and the main contact surface component c21 and is an extension provided narrower than the main contact surface component c21. And a contact surface component c22.

  The recessed portion c1 forms a housing space sp in which a part of the support frame B in another chair A can be positioned at the time of stacking. The recessed portion c1 has a recessed portion forming surface c11 that is inclined forward in side view. The recessed portion forming surface c11 can contact a part of the lower end portion of the front leg frame portion g2 of another chair A having the same structure at the time of stacking. That is, the recess forming surface c11 formed in the recess c1 of the front spacer C abuts on the upper surface of the lower front leg frame portion g21 of the front leg frame portion g2 of the other chair A, and the chair A and the other chairs at the stacking time The relative position to A can be positioned.

  The front spacer C has a substantially rectangular outer side surface, and the entire surface from the front end to the rear end has a planar shape without any step or recess. The entire shape of the front spacer C is based on a rectangular solid, and has a recessed portion c1 ranging from the inner surface of the front end portion to the floor contact surface c2 within that range. Thus, when a plurality of chairs A having the same shape are stacked in the vertical direction, the front leg frame portion g2 of the lower chair A is positioned to fit in the recess c1 of the front spacer C of the upper chair A It has become. The front spacer C is in the form of a rectangular parallelepiped along the extending direction of the base frame portion g1. That is, since the front spacer C does not project largely outward from the base frame g1, the entire chair A can be made compact.

  Note that, in consideration of the stability of the support frame B (for example, the stability against tilting forward), it is preferable that the front spacer C be attached to the front side of the support frame B as much as possible. In addition, it is preferable that the distance between the front spacer C and the rear spacer D be as wide as possible. On the other hand, if it is attempted to excessively extend the position of the front spacer C to the front side of the support frame B, it interferes with the front leg frame portion g2 of the other chair A positioned below in the stacking state. Problems can occur. The front spacer C of this embodiment eliminates such a defect by forming a recessed portion c1 in a part of the inner surface side of the front end portion.

  The seat E is supported by the support frame B. The seat E has a seat frame 1 having a substantially square frame shape, and a tension base 2 stretched in the seat frame 1. The seat frame 1 and the base 2 are integrated by thermal pressure molding.

  The seat frame 1 includes left and right side seat frame portions 11 extending in the front and rear direction, a front seat frame portion 12 extending in the left and right direction connecting between front ends of the left and right side seat frame portions 11, and left and right side seat frame portions 11 And a rear seat frame portion 13 for connecting the rear ends of the two.

  The left and right side seat frame portions 11 are supported from the lower side by the side seat receiving frame portion g4 of the support frame B. The left and right side seat frame portions 11 have a gentle S-shape in side view so as to follow the shape of the side seat receiving frame portion g4. That is, the left and right side seat frame portions 11 are located at the front end portion, and are continuously provided from the rear end of the first front inclined portion 111 in a posture inclined forward in side view and the rear end of the first front inclined portion 111 And a second forwardly inclined portion 113 connected continuously from the rear end of the backwardly inclined portion 112 and in a forwardly inclined posture in side view.

  The first forward inclined portion 111 is supported from below by the first forward inclined frame portion g41 of the side seat support frame portion g4. The rearward inclined portion 112 is supported from below by the rearward inclined frame portion g42 of the side seat support frame portion g4. The second forward inclined portion 113 is supported from below by the second forward inclined frame portion g43 of the side seat support frame portion g4.

  Further, as shown in FIGS. 7 and 10, on the lower surfaces of the left and right side seat frame portions 11, a pull-in member 11a that is substantially rectangular in bottom view and substantially L-shaped in front view and rear view is screwed. It is attached by v6. The outer end of the pull-in member 11a is engaged with the lower surface of the side seat receiving frame portion g4, and the left and right side seat frame portions 11 and the side seat receiving portions are screwed by screwing the screw v6 to the left and right side seat frame portions 11. The frame portion g4 is drawn.

  The front seat frame portion 12 is bridged between the front ends of the left and right side seat frame portions 11. The front seat frame portion 12 is supported from below by the front transverse frame portion H of the support frame B.

  The rear seat frame portion 13 is supported by the rear horizontal frame portion I from the lower side. The rear seat portion 13 has a hanging wall 131 protruding downward at the rear end edge. The outer back support frame J, the inner back support frame K, and the notches 132 for arranging the left and right extension N in the back plate L are provided at the left and right ends of the rear seat frame 13 ing.

  The seat E is capable of concealing a screw v5 which is a backrest fastening tool for fastening the back plate L to the rear cross frame portion I of the support frame B. That is, the rear seat frame portion 13 of the seat frame 1 at the seat E can cover the screw v5 for screwing the back plate L to the rear horizontal frame portion I so that it is difficult to visually recognize from the outside.

  In the chair A shown in the present embodiment, the rear seat frame portion 13 which is a part of the seat E is disposed so as to cover the top of the projecting portion 6 integrally formed on the back plate L of the backrest F. Then, after attaching the back plate L to the support frame B, the chair A attaches the seat E to the support frame B. As for the chair A, the backboard L can not be removed unless the seat E is removed. In other words, the chair A in this embodiment includes the protrusion 6 which is a part of the back plate L, and the seat E capable of concealing the screw v5 inserted through the screw insertion hole 61 of the protrusion 6. Thus, the seat E can be released without difficulty from the support frame B independently without removing the back plate L from the support frame B.

  The base 2 is in the form of a sheet that is tensioned on the seat frame 1. The tension cloth 2 is made of a flexible fabric and has no shape retaining property by itself. The periphery of the tension place 2 is supported by the seat frame 1. In other words, the tension place 2 is disposed in the area surrounded by the seat frame 1.

  The tension 2 is a tension in the front-rear direction, that is, a tension that pulls the front seat frame 12 and the rear seat frame 13 in the lateral direction, that is, a force that pulls the left and right side seat frame 11 toward each other. Is set to be strong. More specifically, the tension material 2 includes a plurality of wefts (not shown) extending in the left-right direction and a plurality of warps (not shown) extending in the front-back direction and having different elasticity characteristics from the weft. It is what is provided. In the cloth 2, the elasticity of the weft is set higher than that of the warp.

  The rear portion of the tensioning material 2 forms a rear seating surface 23 which is an elastically deformable seating surface which is set to be positioned gradually upward toward the rear. The longitudinal center portion of the tensioning material 2 forms a central seating surface 22 which is an elastically deformable seating surface which is set to be positioned gradually downward toward the rear. The front portion of the tensioning material 2 forms an elastically deformable front seating surface 21 which is set to be positioned gradually upward toward the rear.

  That is, in the side seat frame portion 11 of the seat frame 1, the front portion of the tensioning material 2 supported between the first forward inclined portions 111 constitutes the front seating surface 21, and the side seat frame portion of the seat frame 1 The center in the front-rear direction of the tensioning material 2 supported between the backward inclined portions 112 in 11 constitutes the central seating surface 22, and the side seat frame portion 11 of the seat frame 1 is supported between the second forward inclined portions 113. The rear portion of the stretchable base 2 constituting the rear seat 2 constitutes a rear seating surface 23. Note that, in FIG. 9, the cross section of the tension material 2 is indicated by a thick line so that it can be easily grasped.

  The tensioned area 2 supported by the seat frame 1 in this embodiment can be in a so-called three-dimensionally raised form only by the tensioned area 2. In other words, the tensioning material 2 can assume a three-dimensionally raised configuration without being subjected to an external force by another member with respect to a portion inside the peripheral edge. That is, the entire stretchable fabric 2 follows the shape of the side seat frame portion 11 supporting the stretchable fabric 2 in side view, and is configured to be undulated in an S shape in side view. In addition to this, by making the tension in the front and rear direction and the left and right direction in the stretchable base 2 different, the degree of S-shaped unevenness at the center part in the left and right direction of the stretchable base 2 is closer to the side seat frame 11 than that. It is set more gently than the degree of S-shaped undulation at the position.

  The backrest F is provided with a back plate L formed of a synthetic resin.

  The back plate L is provided with a main body portion M having a backrest surface formed on the front side, and left and right extending portions N protruding downward from the main body portion M.

  The main body portion M includes a back plate main body 3 in which a plurality of holes p penetrating in the front-rear direction are formed, and a vertically extending vertical back support portion 4 disposed on the left and right of the back plate main body 3 It is.

  The back plate main body 3 has a substantially rectangular shape. The back plate main body 3 is provided with a plurality of holes p penetrating in the front-rear direction. The plurality of holes p formed in the back plate main body 3 have a substantially rectangular shape in front view. More specifically, the plurality of holes p have a substantially square shape in front view.

  In this specification, "substantially square" includes those which are slightly curved so that the four sides are convex outward or inward.

  The back plate main body 3 constitutes a main part capable of supporting the back of a seated person. The back plate main body 3 is formed so that the thickness dimension is gradually shortened toward the upper side. As shown in FIG. 20, the back plate main body 3 is provided with horizontal band portions 31 extending between the vertical back support portions 4 and extending substantially linearly in the left and right direction between the holes p adjacent in the vertical direction. . A plurality of horizontal band portions 31 are arranged in the vertical direction over substantially the entire area except the upper and lower end portions 33 and 34 of the back plate main body 3.

  In addition, in FIG. 20, in order to facilitate understanding of the horizontal band portion 31, a linear dashed dotted line is shown on a region corresponding to the horizontal band portion 31.

  The back plate main body 3 extends substantially linearly in the vertical direction so as to connect between the upper and lower end portions 33 and 34 of the back plate main body 3 between the holes p adjacent in the left and right direction as shown in FIG. And a vertical band portion 32. A plurality of vertical band portions 32 are arranged in the left-right direction only in the left and right end regions 3 a of the back plate main body 3.

  In addition, in FIG. 20, in order to facilitate understanding of the vertical band portion 32, a linear dashed dotted line is shown on a region corresponding to the vertical band portion 32.

  The width dimension of the hole p provided in the central region 3b of the back plate main body 3 is larger than the width dimension of the hole p provided in the peripheral region 3c located in the outer peripheral region of the central region 3b, as shown in FIG. It is set. That is, the size of the hole p provided in the back plate main body 3 is set to be gradually smaller from the central region 3 b to the peripheral region 3 c.

  The plurality of holes p linearly arranged in the horizontal direction at substantially the same height position are provided in the back plate main body 3 so that the distance between the center points of the adjacent holes p becomes larger toward the peripheral region 3c. ing. In other words, the pitches of the plurality of holes p linearly arranged in the left-right direction are set to be larger as going from the central region 3b to the peripheral region 3c. The virtual lines ks connecting the center points of the plurality of holes p linearly arranged in the left-right direction are set to be parallel to each other in the vertical direction at substantially equal intervals in front view.

  One hole p and the other hole p adjacent to the top and bottom closest to each other are provided in the back plate main body 3 so that the center point does not coincide with the vertical direction.

  The left and right vertical back support parts 4 are disposed on the left and right so as to sandwich the back plate main body 3. The left and right vertical back support portions 4 hold rigidity capable of supporting the back plate main body 3, and no hole penetrating in the front-rear direction is provided. At the lower ends of the left and right vertical spine support portions 4, left and right extension portions N projecting downward are integrally provided.

  The left and right extension parts N are formed in a vertical appearance in the vertical direction and have a columnar appearance having a housing part (not shown) in which the outer back support frame part J and the inner back support frame part K are stored. And a protruding portion 6 protruding inward from the lower end portion of the extending portion main body 5, and a flange portion 7 protruding forward from the lower end portion of the extending portion main body 5.

  The projecting portion 6 has a plate-like shape, and is provided so as to project from the lower end portion of the extending portion main body 5 along the rear surface side of the standing frame portion i2 in the rear horizontal frame portion I. That is, the left and right protrusions 6 are in the form of a projecting piece. The left and right projecting portions 6 have screw insertion holes 61 formed in the front-rear direction through which the screws v5, which are backrest attaching tools, can be inserted in the central part thereof.

  The collar portion 7 is located on the rear end portion of the side seat receiving frame portion g4. The buttocks 7 are covered from the upper side by the rear end of the side seat frame 11 facing the cutout 132 of the seat E. That is, the collar 7 is disposed at a position where it can be sandwiched between the support frame B and the seat E.

  The back plate L is supported by the support frame B by being fitted on the outer back support frame portion J in the standing posture and the inner back support frame portion K in the standing posture. In addition, the back plate L extends in the left-right direction of the support frame B so as not to get out of the outer back support frame portion J and the inner back support frame portion K. It is fixed by In this embodiment, the screw v5 is concealed by the rear seat frame 13, which is a part of the seat E, and viewed from above the seat surface, that is, when viewed in a posture that the user can usually take. It is impossible. The chair A is easily viewed from diagonally above, and in order to improve the appearance, it is necessary to consider the appearance from behind and diagonally above.

  As described above, the chair A according to the present embodiment is a chair in which the support frame B supports the seat E and the backrest F. And the backrest F is equipped with the backplate L formed with the synthetic resin. The back plate L is fixed to the support frame B by a screw v5 which is a backrest fixing tool. The screw v5 is not visible when viewed from above. For this reason, it becomes possible to provide the chair A excellent in the degree of freedom of design that can provide a suitable appearance without causing complication of the structure. That is, since the screw v5 can not be visually recognized from the upper side, the presence of the screw v5 can be suitably used to prevent the appearance of the chair A from being damaged.

  The seat E conceals the screw v5 which is a backrest fastening. In other words, the seat E covers the screw v5 without applying a separate and independent special configuration to cover the screw v5, and therefore a suitable appearance without increasing the number of parts or complicating the structure The chair A can be provided with an excellent degree of freedom in design.

  The back plate L is fixed to a laterally extending frame portion of the support frame B by a screw v5. More specifically, the support frame B is provided with a post frame I, which is a side frame part connecting the left and right leg elements G, and the back plate L is a post frame I by a screw v5. It is supposed to be fixed against For this reason, the screw v5 can be disposed at a suitable position that can be concealed using the seat E.

  The seat E is provided with a seat frame 1 and a tension place 2 stretched in the seat frame 1. And the seat frame 1 can cover the screw v5 from the upper side. Therefore, the chair A can suitably cover the screw v5 from the upper side by utilizing the shape of the seat frame 1.

  A support frame B has a base frame portion g1 which is paired in left and right and extends in the front-rear direction, a front leg frame portion g2 erected at the front end portion of these base frame portions g1, and a rear end portion of the base frame portion g1. Connecting the front end of the side seat receiving frame portion g4 with the rear leg frame portion g3 erected, the side seat receiving frame portion g4 installed between the upper end of the front leg frame portion g2 and the upper end of the rear leg frame portion g3 A back support frame extending from the upper end of a front support frame portion H, a rear support frame portion I serving as a side support frame portion connecting the rear ends of the side seat receiving frame portions g4, and a rear leg frame portion g3 And an outer back support frame portion J which is a frame portion. The seat frame 1 is disposed on the side seat receiving frame portion g4, the front horizontal frame portion H, and the rear horizontal frame portion I, and the back plate L is an outer back supporting frame portion J. And is supported by the support frame B. For this reason, the backplate L partially covered by the seat E and the seat E partially covering the backplate L are suitably supported on the support frame B respectively. There is.

  The back plate L includes a main body portion M having a backrest surface and left and right extending portions N protruding downward from the main body portion M. Then, the left and right extending portions N are provided with the protruding portions 6 protruding inward in the left and right direction. For this reason, the backplate L is provided with the suitable structure with which the seat E can be coat | covered.

  The back plate L includes a main body portion M forming a backrest surface, and left and right extending portions N protruding downward from the main body portion M, and the left and right extending portions N stop for backresting. A screw insertion hole 61, which is a fastening device insertion hole through which the fitting screw v5 can be inserted, is formed. For this reason, the back plate L has a suitable configuration that can be screwed to the support frame B.

  The back plate L includes a main body portion M forming a backrest surface and left and right extending portions N protruding downward from the main body portion M, and the left and right extending portions N are respectively inward. A screw insertion hole 61 is formed as a fastening tool insertion hole through which a screw v5 serving as a backrest fastening tool can be inserted. For this reason, the backplate L is provided with a suitable configuration that can be covered by the seat E, and the backplate L is provided with a suitable configuration that can be screwed to the support frame B.

  The chair A is a support frame B supporting a seat E and a backrest F, and a part of the seat E is disposed on a member constituting the backrest F, and the support frame After attaching the backrest F to B, the seat E is attached to the support frame B. For this reason, it is possible to remove the seat E regardless of the backrest F despite the fact that the seat E is in relation to the backrest F, and the maintenance of the seat E having the tension ground 2 It is excellent in sex.

  The present invention is not limited to the embodiments detailed above.

  The means for making the backrest fixing tool invisible is not limited to the seat. In other words, backrest anchors are not limited to those concealed by the seat.

  The backrest fastener is not limited to a screw, and may be anything that can fasten the backrest to the support frame. Examples of other backrest fastening devices include pin-like ones, cord-like ones and wire-like ones.

  The specific part of the support frame to which the backrest fastener is attached can be set arbitrarily. That is, the back plate is fixed to the frame portion extending in the front-rear direction, the frame portion extending in the left-right direction, or the frame portion extending in the vertical direction that constitutes the support frame It may be one.

  The protrusions provided on the left and right extension parts are not limited to those projecting inward. That is, the projection may be provided to project forward or backward.

  The protrusion may not be provided with a screw insertion hole. For example, the projection may be associated with the support frame and the main purpose may be to exert a positioning function with respect to the support frame.

  The left and right leg elements constituting the support frame are not limited to those shown in the above-described embodiment, and may be anything as long as they can support the seat from below.

  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 scope of the present invention.

B: Support frame E: Seat F: Backrest L: Back plate v5: Screw (attachment for backrest)

Claims (8)

A chair in which the support frame supports the seat and backrest,
The backrest comprises a back plate formed of a synthetic resin, and the backplate is fastened to the support frame by a backrest fastening tool,
A chair that is invisible when viewed from above the backrest tie. The chair according to claim 1, wherein the seat conceals the backrest lock. The support frame is provided with a horizontal support frame portion connecting the left and right leg elements,
The chair according to claim 1 or 2, wherein the back plate is fastened to the cross frame portion by the backrest fastening tool. The seat is provided with a seat frame and a tensioned place in the seat frame,
The chair according to any one of claims 1 to 3, wherein the seat frame can cover the backrest fastening device from above. The support frames are erected at a base frame portion which is paired in left and right and extending in the front-rear direction, a front leg frame portion erected at the front end portion of the base frame portions, and a rear end portion of the base frame portion. A front cross frame portion connecting between a front leg portion of the rear leg frame portion, a side seat receiving frame portion bridged between an upper end of the front leg frame portion and an upper end of the rear leg frame portion, and a front end portion of the side seat receiving frame portion And a rear support frame portion connecting between the rear end portions of the side seat support frame portions, and a back support frame portion extending upward from the upper end of the rear leg frame portion,
The seat frame is disposed on the side seat receiving frame portion, the front transverse frame portion, and the rear transverse frame portion.
The chair according to claim 4, wherein the back plate is externally fitted to the back support frame portion and supported by the support frame. The back plate includes a main body portion forming a backrest surface and left and right extending portions protruding downward from the main body portion,
The chair according to claim 1, 2, 3, 4 or 5, wherein a fastening tool insertion hole through which the backrest fastening tool can be inserted is formed in the left and right extending portions. The back plate includes a main body portion forming a backrest surface and left and right extending portions protruding downward from the main body portion,
The left and right extending portions are provided with protruding portions protruding in the front or left and right direction, respectively, and a fastening tool insertion hole through which the backrest fastening tool can be inserted is formed in these protruding portions. Yes,
A chair according to claim 1, 2, 3, 4, 5 or 6, wherein the seat covers the projection. A chair in which the support frame supports the seat and backrest,
A part of the seat is disposed on a member constituting the backrest,
A chair attaching the seat to the support frame after attaching the backrest to the support frame.

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