JP2016083114A - Load support member for chair and chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a load support member for a chair, which facilitates fitting of a surface material to a frame member, and a chair having the same.SOLUTION: A load support member for a chair is provided in a chair and comprises a frame member having a pair of rod materials 9, and a surface material 11 supported on the frame member. A support part 16 having a fitting recess 19 opening to a front face side of the chair is provided respectively in the pair of rod materials 9 on inner surfaces facing each other. The surface material 11 has side part support frames 11b, and is supported on the support parts 16 by fitting the side part support frames 11b into the fitting recesses 19 of the support parts 16. In the support part 16, a transition surface 22 inclined so as to narrow the opening of the fitting recess 19 toward a back face side of the chair is formed at a portion from a front face side of the chair to the inside of the fitting recess 19 in an outer peripheral part of the opening of the fitting recess 19.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a load support member for a chair and a chair.

  Conventionally, as a chair load support member in which a tension member having an elastic resistance against a load from a perpendicular direction is supported on a frame member as a strength member, and a chair including the same, for example, Patent Document 1, Patent Some are disclosed in Document 2. In the chairs disclosed in these Patent Documents 1 and 2, the face material is supported in the inner peripheral space of the collar material constituting the frame member. Specifically, the face material is attached to the frame member from the front side by fitting the face material into a groove portion opened on the side where the face material is located. By adopting such a structure, the face material can be easily attached to the frame member without greatly extending the face material.

  By the way, when adopting such a structure, in order to increase the fitting strength of the face material, as disclosed in the mounting structure of Document 2, the fitting groove is deepened in the thickness direction of the frame member, Correspondingly, the portion to be fitted to the fitting groove in the face material is also preferably long in the thickness direction of the frame member. By adopting such a structure, when a load is input in the direction perpendicular to the surface of the face material, the mated portion of the face material rotates outward in the fitting groove with respect to the input direction of the load. Therefore, the fitted portion comes into stronger contact with the fitting groove.

Japanese Patent No. 3686309 Japanese Patent No. 4731753

  However, in the mounting structure of Patent Document 1, the standing wall that forms the outer end of the fitting groove is formed to be flush with the face material when the face material is attached to the frame member and supported. . And this standing wall has a corner | angular part in the near side of a fitting groove so that a clearance gap may not arise with a face material. For this reason, when the work of fitting the face material into the fitting groove is performed, the work is difficult to perform because the entrance is narrowed.

  This invention is made | formed in view of the said subject, and it aims at providing the load support member for chairs which made easy the attachment of the face material to a frame member, and a chair provided with this.

  The load support member for a chair according to the present invention is a load support member for a chair provided in a chair, and is a frame member as a strength member provided with a pair of eaves members spaced apart in parallel in the width direction of the chair. And a face member supported by the frame member, and the pair of saddle members are provided with support portions having fitting recesses that open to the front side of the chair, respectively, on the inner surfaces facing each other. The face material has a fitting convex portion, and the fitting convex portion is supported by the supporting portion by fitting into the fitting concave portion of the supporting portion, and the supporting concave portion includes the fitting concave portion. In the outer peripheral portion of the opening, a transition surface that is inclined so as to narrow the opening of the fitting recess as it goes to the back side of the chair is formed in a portion extending from the front side of the chair into the fitting recess. It is characterized by that.

  According to the load support member for a chair, the opening of the fitting recess is narrowed as it goes from the front side of the chair to the inside of the fitting recess on the outer periphery of the opening of the fitting recess as it goes to the back side of the chair. In addition to fitting the fitting convex part of the face material directly into the fitting concave part from the front, for example, the fitting convex part is pushed in slightly from the opening of the fitting concave part. By sliding the fitting convex portion along the inclination of the transition surface, the fitting convex portion can be easily fitted into the fitting concave portion. Therefore, it is possible to substantially widen the opening of the fitting recess, and it is easy to attach the face material to the frame member.

Moreover, in the load support member for a chair, the fitting convex portion comes out of the fitting concave portion by engaging with each other between the fitting concave portion and the fitting convex portion of the face material. It is preferable that a retaining portion for restricting the above is provided.
According to this configuration, since the retaining portion is provided between the fitting concave portion and the fitting convex portion of the face material, an unexpected external force is applied after fitting the fitting convex portion into the fitting concave portion. When the fitting protrusion is pulled out of the fitting recess, the face material is prevented from being detached from the frame member.

Further, in the load supporting member for a chair, the retaining portion is formed on a folded portion formed at a rear end of the fitting convex portion and an innermost portion of the fitting concave portion and is engaged with the folded portion. It is preferable that it is formed by a retaining protrusion that stops.
According to this configuration, when the folded portion is pushed into the fitting recess, the folded portion is elastically deformed in a direction perpendicular to the depth direction when the folded portion gets over the retaining projection. Then, after getting over the retaining projection, the folded portion is elastically restored and locked to the retaining projection. Thereby, the fitting to the fitting recess can be completed only by pushing in the folded portion. Moreover, since the retaining protrusion is formed at the innermost part of the fitting recess, the folded portion returns to the front side, and is prevented from coming out of the fitting recess along the transition surface.

In the chair load support member, the transition surface is provided on the outer surface side of the saddle member from the fitting recess, and is directed to the front side of the chair and toward the inner side surface of the saddle member. It is preferably formed in a bulging cross sectional view arc shape.
According to this configuration, since the transition surface is formed in an arc shape that bulges toward the inner surface side, the fitting convex portion of the face material is slid along the transition surface and moved into the fitting concave portion. At this time, the sliding movement of the fitting convex portion becomes smoother, so that the attachment of the face material becomes easier.

Moreover, in the load support member for a chair, the support portion includes the saddle member and a support member disposed with a gap on the inner side surface of the saddle member, and the saddle member and the support member. The gap between them is the fitting recess, and the support material is a free end formed so that the opening side of the fitting recess is swingable, and the end of the front side of the chair at the free end is It is preferable that the chair is located closer to the back side of the chair than the end of the chair on the front side of the portion forming the fitting recess.
According to this configuration, since the opening side of the fitting recess in the support material is a free end formed so as to be swingable, the free end can be spread using a hand opposite to the hand holding the face material. Therefore, the fitting convex portion of the face material is more easily fitted into the fitting concave portion. In addition, since the end portion on the front side of the free end is located closer to the back side than the end portion on the front side of the portion forming the fitting recess in the saddle material, the end portion of the free end and the saddle material By attaching the face material so as to fill the step between the front end portion, the face material and the saddle material can be continued without any step in a state where they are supported with each other.

Further, the chair load support member preferably includes an exterior material having a front-side stretch member that is supported by a portion other than the fitting recess in the saddle member and located on the front side of the chair rather than the face material. .
According to this configuration, since the exterior material having the front-side tension member located on the front side of the chair rather than the face material is provided, the fitting concave portion is shielded by the exterior material, and therefore the fitting is performed when the chair is viewed from the front side. The concave portion is prevented from being visually recognized.

The chair according to the present invention is characterized in that the chair load support member is provided as a backrest on which the saddle member is arranged along the vertical direction.
According to this chair, since the chair load support member is a backrest, it is easy to attach the face material to the frame member when assembling the backrest, and thus the chair has excellent assembling workability. .

According to the load supporting member for a chair of the present invention, it is easy to attach the face material to the frame member.
According to the chair of the present invention, the assembly workability is excellent.

It is the perspective view seen from the front side of one embodiment of the chair concerning the present invention. It is the perspective view seen from the back side of one embodiment of the chair concerning the present invention. It is a disassembled perspective view of the backrest used as one embodiment of the load supporting member for chairs concerning the present invention. It is a figure which shows schematic structure of a frame member, Comprising: (a) is a front view, (b) is a side view. It is AA arrow sectional drawing of Fig.4 (a). FIG. 5 is a cross-sectional view taken along line BB in FIG. 4 (a). It is a disassembled perspective view of the member provided in a tension material and a tension material. It is CC sectional view taken on the line of FIG. It is DD sectional view taken on the line in FIG.

  Hereinafter, embodiments of a chair according to the present invention will be described in detail with reference to the drawings. In the following description, the direction in which the front of the person seated in the chair 1 in the normal posture faces is referred to as “front” or “front”, and the opposite direction is referred to as “rear” or “back”. To do. For “upper”, “lower”, “left”, and “right”, the upper direction of a person seated in a chair in a regular posture is called “up”, and the opposite direction is called “lower”. The direction of the left side of a person seated in a normal posture is called “left”, and the direction opposite to that is called “right”. That is, the vertical direction is called the up-down direction, and the horizontal direction is called the left-right direction.

  FIG. 1 is a perspective view of a chair according to an embodiment of the present invention as seen from the front side, and FIG. 2 is a perspective view of the same as seen from the back side. In these figures, reference numeral 1 is a chair. The chair 1 is attached to a leg 2 placed on the floor, a support base 3 installed at the upper end of the leg 2, a seat 4 on which a seated person sits, and an upper surface of the support base 3. The seat receiving member 5 that supports the seat body 4 and the backrest 6 that extends from the support base 3 to the rear upper side and supports the back of the seated person seated on the seat body 4 are configured.

  The leg 2 includes a multi-leg 7 with casters 7 a and a pedestal 8 that stands up from the center of the multi-leg 7 and incorporates a gas spring that is a lifting mechanism, and a support base 3 is provided at the upper end of the pedestal 8. It is attached. The support base 3 incorporates an elevation adjustment mechanism for the pedestal column 8 and a tilt adjustment mechanism for the backrest 6.

  The backrest 6 is an embodiment of a load support member for a chair according to the present invention. As shown in FIG. 3, which is an exploded perspective view of the backrest 6, the backrest 6 is separated in the width direction (left-right direction) of the chair 1. A frame member 10 including a pair of flanges 9 and 9 arranged substantially in parallel, a face member 11 (interior material) laid between the pair of flanges 9 and 9, and a pair of flanges 9 and 9 A bag-like tension member 12 (exterior material) placed on the arm member 13 and armrests 13 attached to both sides of the frame member 10 in the width direction.

  As shown in FIGS. 4A and 4B, which are schematic configuration diagrams, the frame member 10 is provided integrally with the pair of saddle members 9 and 9 and the lower end portions (the other end portions) thereof. It has a lower frame portion 14 and is configured by attaching a connecting frame 15 to the upper end portions (one end portions) of the pair of ribs 9 and 9. In the present embodiment, as described above, the armrests 13 are attached to both sides in the width direction of the frame member 10, that is, to the connection portions between the pair of eaves 9 and 9 and the lower frame portion 14. However, the chair load support member (backrest 6) according to the present invention may be configured such that the armrest 13 is not attached to the frame member 10.

  The face material 11 is formed in a substantially rectangular shape as shown in FIG. 3, and a side material support 11a made of a mesh material, an elastomer, or the like, and side support provided on both sides of the face material main body 11a in the width direction. It consists of frames 11b and 11b (fitting protrusions) and a lower support frame 11c provided at the lower end of the face material body 11a. The side support frame 11b and the lower support frame 11c are attached toward the back (backward direction) of the face material 11 by sewing or the like. The face material 11 is supported by the side support frames 11b and 11b being attached to the side support part 16 (support part) of the saddle member 9 shown in FIG. 4A, and the lower support frame 11c is supported by the lower frame part 14. It is fixed to the frame member 10 by being attached to and supported by the lower support portion 17.

  As shown in FIG. 5 which is a cross-sectional view taken along the line AA in FIG. The brazing material 9 and a thin plate-like support material 18 disposed along the brazing material 9 with a gap on the inner surface side of the brazing material 9 are formed. That is, the gap formed between the saddle member 9 and the support member 18 serves as a fitting recess 19 for attaching the side support frame 11 b of the face member 11. In addition, as shown in FIG. 4A, an attachment plate 20 for attaching the support member 18 to the saddle member 9 is provided between the saddle member 9 and the support member 18 between the saddle member 9 and the support member 18. It is provided on the side (back side). Each mounting plate 20 is provided with a plurality of mounting ports 20a (six in FIG. 4A) in the vertical direction at substantially equal intervals.

  The fitting recess 19 opens to the front side (front side) of the chair 1, that is, the side receiving the load of the seated person (load receiving surface side). As shown in FIG. A side support frame 11b of the material 11 is fitted. As shown in FIG. 3, a plurality of claw portions 21 (six in FIG. 3) are formed on the rear end portion of the side support frame 11b. These claw portions 21 respectively enter the mounting opening 20a of the mounting plate 20 and are locked to the retaining projection 20b of the saddle member 9 shown in FIG.

  That is, the claw portion 21 protrudes from the rear end of the side support frame 11b to the rear side, and is further bent to the outside in the width direction of the chair 1 and then returned to the front side. The side portion support frame 11b (fitting convex portion) comes out of the fitting concave portion 19 by the portion 21a) being engaged with the retaining convex portion 20b formed at the innermost portion on the back side of the saddle member 9. Is regulated. That is, when the folded portion 21a is inserted into the fitting recess 19, the folded portion 21a is elastically deformed in a direction perpendicular to the depth direction when it gets over the retaining projection 20b. Then, after getting over the retaining projection 20b, the folded portion 21a is elastically restored and locked to the retaining projection 20b. Thereby, the fitting to the fitting recessed part 19 can be completed only by pushing in the folding | returning part 21a. With the folded-back portion 21a of the claw portion 21 formed at the rear end portion of the side support frame 11b (fitting convex portion) and the retaining convex portion 20b formed at the innermost portion of the fitting concave portion 19, A retaining portion according to the present invention, that is, a retaining portion that restricts the side support frame 11b (fitting convex portion) from coming out of the fitting concave portion 19 by being locked to each other is formed.

  In addition, when the side part support frame 11b is inserted in the fitting recessed part 19, the some nail | claw part 21 is each inserted in the corresponding attachment port 20a, and the folding | returning part 21a latches to the retaining projection part 20b. It has been made.

  Here, the side support frame 11b is fitted to the fitting recess 19 on the outer side in the width direction of the chair 1 at the outer peripheral portion of the opening of the fitting recess 19 in the side support portion 16 (support portion) of the saddle member 9. A transition surface 22 for guiding is formed. In the present embodiment, the transition surface 22 is formed in a region from the end of the front side of the saddle member 9 (the front side of the chair 1) to the opening end of the fitting recess 19, and the rear side ( In order to narrow the opening of the fitting recess 19 as it goes to the back side of the chair 1, it is inclined so as to approach the opening end of the fitting recess 19. In the present embodiment, the transition surface 22 is provided on the inner surface side of the saddle member 9 that forms the fitting recess 19, and is on the front side of the saddle member 9 (front side of the chair 1) and on the inner side surface of the saddle member 9. It is formed in an arc shape in a cross sectional view that bulges toward the side.

  In such a configuration, when the side support frame 11b of the face member 11 is fitted into the fitting recess 19, for example, the claw portion 21 side of the side support frame 11b is placed outside the fitting recess 19. The side support frame 11b can be easily fitted into the fitting recess 19 by being caused to abut against the transition surface 22 and then slide along the inclination of the transition surface 22 to be guided by this inclination (transition surface 22). it can. Accordingly, after the side support frame 11b is fitted into the fitting recess 19, the claw portion 21 is inserted into the mounting opening 20a, and the turn-back portion 21a is locked to the retaining projection 20b, whereby the side support frame 11b. Can be fixed to the side support 16.

  The support member 18 is a free end (free end) formed so that the opening side of the fitting recess 19 (the front side of the chair 1) can swing. Thus, the side support frame 11b can be easily fitted into the fitting recess 19. That is, the free end (support material 18) can be pushed and spread using a hand opposite to the hand holding the face material 11, and the side support frame 11b can be fitted into the fitting recess 19 in this state.

  Furthermore, the front-end | tip part (end part of the front side of the chair 1) in the free end of the support material 18 is the end surface (end part) of the front side (front side of the chair 1) of the site | part which forms the fitting recessed part 19 in the collar 9. ) Is located closer to the back side of the chair 1 than. Thereby, since the position of the face material 11 is retracted (offset) to the back side of the chair 1 from the end portion on the front side (load receiving face side) of the collar material 9, the face material 11 will be described later. The front side of this is brought into contact with the back side, and the deformation of the upholstery material 12 is prevented. Further, by attaching the face material 11 so as to fill the step between the front end portion of the free end and the front end portion of the saddle material 9, the face material 11 and the saddle material 9 are mutually supported. In this state, it can be continued without a step.

  Further, as shown in FIG. 3, a claw portion 23 is also formed in the lower support frame 11c, and the claw portion 23 is fitted into the mounting opening 24 in the lower support portion 17 of the lower frame portion 14, thereby the lower support frame 11c. 11 c is fixed to the lower frame 14. In other words, a configuration similar to that of the folded portion 21a and the retaining projection 20b of the claw portion 21 described above is provided between the claw portion 23 of the lower support frame 11c and the mounting opening 24 of the lower support portion 17 as necessary. The lower support frame 11 c is fixed to the lower frame 14. As described above, the side members 11 b and 11 b and the lower support frame 11 c are fixed to the frame member 10, whereby the face material 11 is also fixed to the frame member 10.

  In the present embodiment, the face material 11 fixed to the frame member 10 is repelled by receiving a load (weight) applied to the face material body 11a by the back of the seated person, that is, a load in a direction perpendicular to the face (direction perpendicular to the face). It is an elastic body (elastic resistance body). As described above, the face material main body 11a is formed of a mesh material or an elastomer so as to be elastically deformable, and is configured to exhibit a repulsive force when receiving a load in a direction perpendicular to the face. Note that the side support frame 11b and the lower support frame 11c are formed of an elastically deformable resin.

  Further, the frame member 10 is formed with recesses 25 that open to the outside in the width direction at the respective lower end edge sides (the other end edge side) on both sides in the width direction, that is, at portions intersecting the lower frame portion 14. As shown in FIG. 6 which is a cross-sectional view taken along the line BB in FIG. 4A, the recess 25 is formed up to the inside of the saddle member 9, and in this embodiment, the opening of the recess 25 is formed. The armrest 13 (occlusion member) is attached. That is, the armrest 13 is detachably fixed to the nut 26 embedded in the recess 25 by the bolt 27.

  In addition, in this recessed part 25, the connection board 32 which connects the side part opening of the tension material 12 mentioned later is provided. Further, the armrest 13 is formed with a through hole 13a for attaching a bolt 27 therein, and a cover plate 13b for closing the through hole 13a is attached to the opening on the outside of the through hole 13a. The opening on the outside of the through hole 13a is preferably formed in the same opening shape as the recess 25 to which the armrest 13 is attached. When configured in this way, when the armrest 13 is not attached to the recess 25, the opening can be closed by attaching the cover plate 13 b to the recess 25.

  As shown in FIG. 7, the upholstery 12 is provided on the front side (load receiving surface side) of the chair 1 and on the front side of the chair 1 (on the load receiving surface side) and on the back side of the chair 1 (opposite to the load receiving surface). The substantially rectangular backside stretch material 29 to be disposed is formed in a bag shape, and is covered with a pair of eaves members 9 and 9 as shown in FIGS. As shown in FIG. 3, the upholstery material 12 has a front side upholstery material 28 and a back side upholstery material 29 which are stitched at both the upper end edge (one end edge) in the length direction of the brim material 9 and the side end edges in the width direction. Thus, an opening 30 continuous in the width direction is formed on the lower end edge side (the other end edge side) in the length direction.

  However, as shown in FIG. 7, the tension member 12 has an end 31 a on the lower edge side of the joining portion 31 at both side edges of the front side tension material 28 and the back side tension material 29, and the lower edge of the side edge. It is located near the upper end edge of the side end edge. Thus, the opening 30 is formed to have a side opening 30 a that opens to the lower end edge side of both side edges of the tension member 12.

  As shown in FIGS. 3 and 7, the side opening 30 a is provided with a connecting plate 32 that connects the lower end edge side of the front side tension member 28 forming the side opening 30 a and the lower end edge side of the back side tension member 29. ing. The connecting plate 32 is a thin plate made of a bent resin or the like that is elastically deformed in the shape of a letter at the center in the length direction so that the upper end edge side of the tension member 12 is convex and the lower end edge side is concave. In addition, one side sandwiching the bent portion 32 a shown in FIG. 7 is connected to the lower end edge side of the front side tension member 28, and the other side is connected to the lower end edge side of the back side tension member 29.

  Since the connecting plate 32 is formed with a bent portion 32a at the center in the length direction, the length of one side sandwiching the bent portion 32a is substantially the same as the other length. Thus, the length of one side of the connecting plate 32 is substantially the same as the length of the portion forming the side opening 30 a of the front side tension member 28, and the length of the other side is the side of the back side tension material 29. The length of the part forming the part opening 30a is substantially the same. That is, the length of one side of the connecting plate 32 is substantially the same as the length from the end 31a on the lower end edge side of the joining portion 31 to the lower end edge of the front side tension member 28, and the length on the other side. However, the length of the back side tension member 29 from the end portion 31a on the lower end edge side of the joining portion 31 to the lower end edge is formed substantially the same.

  The front side tension member 28 or the back side tension member 29 and the connection plate 32 are connected by, for example, sewing. Here, the connection of the connecting plate 32 to the front side tension member 28 and the back side tension member 29 is performed, for example, by the following procedure. First, one of the front-side upholstery material 28 and the back-side upholstery material 29 is turned over so that the back surface side is exposed. Subsequently, one side of the connecting plate 32 is placed on the upholstery material with the back side facing up, and the connecting plate 32 is in a state where the upholstery material is down and the connecting plate 32 is up, that is, the connecting plate 32 is visible. Is sutured to the upholstery. At this time, the end of the other side of the connecting plate 32 (the side to be sewn to the other tension member) is in a floating state. Next, the tension member is reversed, and the other side of the connecting plate 32 is stitched to the back side of the other tension member in the same manner as in the case of the one tension member described above. Thereafter, the portions forming the side openings 30a of the front side tension material 28 and the back side tension material 29 sewn to the connection plate 32 are folded inward from the outside together with the connection plate 32 as shown in FIG. Put in. Thereby, the connecting plate 32 can be disposed in contact with the inner surface of the recess 25. That is, by restoring the connecting plate 32 bent by elastic deformation, the connecting plate 32 is expanded and both sides thereof are brought into contact with the inner surface of the recess 25. The connecting plate 32 may be formed into a bent shape without being elastically deformed. In that case, when the connecting plate 32 is placed in the recess 25, the connecting plate 32 may be disposed in a close proximity without contacting the connecting plate 32 to the inner surface of the recess 25.

  Further, as shown in FIG. 3, a front back core material 33 is attached to the opening 30 of the upholstery material 12 on the rear surface of the lower end portion of the front side upholstery material 28, and A core member 34 is attached. The front back core material 33 and the back back core material 34 are thin plate-like materials made of resin or the like, and are attached to the front side tension material 28 or the back side tension material 29 by sewing or the like. A plurality of engaging portions (not shown) are formed on the inner surface (rear surface) of the front back core material 33. By engaging these engaging portions with engaging portions (not shown) formed on the lower support portion 17 of the lower frame 14, the front back core material 33 is attached to and supported by the lower support portion 17. ing. Further, the rear back core material 34 is formed with a plurality of engaging portions (not shown) on its inner surface (front surface). By engaging these engaging portions with engaging portions (not shown) formed on the lower support portion 17 of the lower frame 14, the rear back core material 34 is also attached to the lower support portion 17 and supported. Has been. Thus, by attaching the front back core material 33 and the back back core material 34 to the lower support portion 17, the opening 30 of the bag-like tension material 12 is closed by the lower frame portion 14. The opening 30 is not exposed.

  Further, the front tension material 28 and the back tension material 29 are joined to the upholstery material 12 at the end edge (upper end edge) on the upper end edge side (one end edge side) slightly inside the outer end in the width direction of the chair 1. A surplus length portion 35 is formed. Then, as shown in FIG. 8 which is a cross-sectional view taken along the line CC in FIG. 4B, an exposure port 36 for exposing the brazing material 9 is formed inside the extra length portion 35 in the width direction. Has been.

  The brazing material 9 has a fitting hole 9 a having an opening communicating with the exposure port 36 at an end on the exposure port 36 side, that is, an upper end portion, and the extra length portion 35 protruding in the length direction of the brazing material 9. And a protruding edge portion 9b that is in contact with. In the present embodiment, the projecting edge portion 9b is formed in an annular shape continuously on the outer peripheral portion surrounding the fitting hole 9a over the entire circumference thereof. Therefore, the protruding edge portion 9 b is in contact with not only the extra length portion 35 of the tension member 12 but also the entire outer peripheral portion of the exposure port 36.

  The connection frame 15 is attached to the fitting hole 9a of the brazing material 9 exposed to the exposure port 36 and communicating with the exposure port 36 in this way. The connection frame 15 is fitted into the fitting hole 9a through the exposure port 36 and closes the exposure port 36, and the connection unit that connects the pair of closing portions 37 and 37 as shown in FIG. 38, and the pair of closing portions 37, 37 are attached to the corresponding brazing material 9, thereby connecting the pair of brazing materials 9, 9.

  As shown in FIG. 8, the closing portion 37 is fitted into the fitting hole 9a through the exposure port 36, and the fitting projection 37a is located on the base side (upper end side) of the fitting projection 37a. The cover portion 37b extends outward. The covering portion 37b is formed on the protruding edge portion 9b of the eaves member 9 through the outer peripheral portion of the exposure port 36 including the surplus length portion 35 of the tension member 12 in a state where the fitting protrusion 37a is fitted in the fitting hole 9a. I'm hitting. The fitting protrusion 37a has a cylindrical shape having a hole therein, and a nut is accommodated in the hole as will be described later.

  As shown in FIG. 9, which is a cross-sectional view taken along the line DD of FIG. 4B, the fixing of the blocking portion 37 to the brazing material 9 (fitting hole 9a) is performed on the rear side of the brazing material 9. It is made by a screw 39 inserted from the (rear side). That is, the screw 39 is inserted into the fitting hole 9a through a screw hole (not shown) formed on the rear side (back side) of the brazing material 9. The screw 39 is further inserted into the fitting projection 37a fitted in the fitting hole 9a, and is screwed into the nut 40 accommodated in the hole. Thereby, the fitting protrusion 37a is screwed into the fitting hole 9a of the collar member 9 and fixed.

In addition, attachment of the connecting frame 15 and the tension member 12 to the pair of ribs 9 and 9 including such screwing is performed as follows.
First, as shown in FIG. 3, connecting plates 32 are respectively attached to the side openings 30 a of the bag-like tension member 12, the front tension core member 33 is attached to the front tension member 28, and the back tension member 29. The back-back core material 34 is attached to each. However, the front back core member 33 and the rear back core member 34 may be attached later.

  Next, the fitting protrusions 37a of the closing portion 37 of the connecting frame 15 are inserted into the exposed openings 36, 36 on the upper end edge of the tension member 12 from above, respectively, and the fitting protrusion 37a is stretched from the exposed openings 36, 36. Project into the material 12. Subsequently, the tension member 12 is turned over with the fitting protrusion 37a protruding from the exposure openings 36 and 36 in this manner. That is, the tension member 12 turned upside down with the fitting protrusion 37a on the lower side is pulled upward, and the connecting portion 38 of the connection frame 15 is accommodated in the inverted tension member 12 and the fitting protrusion 37a is moved to the lower end side. Expose in a protruding state.

  Next, the pair of fitting protrusions 37a protruding to the lower end side are fitted into the corresponding fitting holes 9a of the collar member 9, and then the fitting protrusion 37a is screwed to the collar member 9 as shown in FIG. To do. The face member 11 is attached to the frame member 10 prior to fitting the fitting protrusion 37 a into the fitting hole 9 a of the collar member 9. When the fitting projection 37a is fitted into the fitting hole 9a of the saddle member 9, the fitting projection 37a fits into the fitting hole 9a of the saddle member through the exposed port 36 of the tension member 12 as shown in FIG. The cover portion 37b abuts against the projecting edge portion 9b of the eaves member 9 through the extra length portion 35 and the like by contacting the entire outer periphery of the exposure port 36, so The extra length portion 35 and the like of the tension member 12 are aligned. Thereby, even when the upholstery material 12 is greatly stretched, the positional deviation between the exposure port 36 and the eaves material 9 is suppressed.

  When the fitting protrusion 37a is screwed in this way and the connecting frame 15 is attached to and fixed to the pair of ribs 9 and 9, the tension member 12 that has been turned over is returned to its original position and covered with the pair of ribs 9 and 9. . At that time, since the opening 30 of the tension member 2 has the side openings 30a, the opening of the bag-like tension member 12 can be greatly expanded, and therefore the tension member 12 can be easily covered with the frame member 10. Can do. By returning the tension member 12 that has been turned upside down in this way, the bag-like tension member 12 passes through the opening 30 to the saddle members 9, 9 (frame member 10) in one end side in the length direction (upper end). Side). Accordingly, the screw 39 to which the fitting protrusion 37a is fixed is hidden by the tension member 12 without being exposed.

  When the tension member 12 is thus covered on the frame member 10, the connecting plate 32 attached to the side opening 30a of the tension member 12 is pushed into the recess 25 of the frame member 10 as shown in FIG. Thereby, the site | part which forms each side opening 30a of the front side tension material 28 and the back side tension material 29 connected with the connection board 32 is also accommodated in the recessed part 25. FIG. Therefore, by attaching the armrest 13 to the recess 25, the side opening 30a of the tension member 12 and the connecting plate 32 are hidden without being exposed.

  Further, the front back core member 33 and the rear back core member 34 attached to the opening 30 of the tension member 12 are also attached to the lower support portion 17. Thereby, the upholstery material 12 is fixed to the frame member 10. In this embodiment, the tension member 12 fixed in this manner has a repulsive force against a load (weight) applied by the seated person's back, that is, a load in a direction perpendicular to the surface, from the same repulsive force of the face member 11. It is relatively small. That is, in this embodiment, the face material 11 attached to the frame member 10 as a strength member is a repelling body (elastic resistor) that repels a load (weight) applied by the seated person's back. . Thereby, since there is no restriction | limiting about a repulsive force about the material, design, etc. of the front side tension material 28 and the back side tension material 29 which comprise the tension material 12, it selects freely based on the property etc. which are calculated | required. That is, it has a high degree of freedom in terms of design.

  The backrest 6 (chair load supporting member) having such a configuration is configured such that the attachment portion 41 of the lower frame portion 14 shown in FIG. 3 is attached to the support base 3 shown in FIGS. Is assembled. Further, since the backrest 6 is attached to the support base 3 in this way, the front back core 33 and the back back core 34 attached to the opening 30 of the upholstery 12 are not exposed. It is stored in the material 12.

  In the chair load support member (backrest 6) of the present embodiment, the chair is located on the outer peripheral portion of the opening of the fitting recess 19 from the front side of the chair 1 to the opening end of the fitting recess 19. Since the transition surface 22 that is inclined so as to approach the opening end of the fitting recess 19 as it goes to the back side of 1 is formed, the side support frame 11b of the face material 11 is directly fitted into the fitting recess 19 from the front. Not only the side support frame 11b is pushed in slightly from the outside of the opening of the fitting recess 19, but the side support frame 11b is slid along the inclination of the transition surface 22 to move, thereby the fitting recess 19 Can be easily fitted. Therefore, since the opening of the fitting recess 19 can be substantially expanded, the attachment of the face material 11 to the frame member 10 can be facilitated.

In addition, since a retaining portion is provided between the fitting recess 19 and the side support frame 11b of the face member 11, after the side support frame 11b is fitted into the fitting recess 19, an unexpected external force is applied. When the side support frame 11b is removed from the fitting recess 19, the face member 11 can be prevented from being detached from the frame member 10 when added.
In addition, since the retaining portion is formed by the folded portion 21a formed on the side support frame 11b and the retaining convex portion 20b formed on the fitting concave portion 19, the folded portion 21a is formed by the retaining convex portion. By engaging with the portion 20b, the folded portion 21a can be reliably prevented from coming out of the fitting recess 19. Moreover, the fitting to the fitting recessed part 19 can be completed only by pushing in the folding | returning part 21a. Further, since the retaining projection 20b is formed at the innermost part of the fitting recess 19, it is possible to prevent the folded portion 21a from returning to the front side and coming out of the fitting recess 19 along the transition surface 22. it can.

  Further, since the transition surface 22 is formed in an arc shape that bulges toward the inner surface, the side support frame 11b of the face material 11 is slid along the transition surface 22 and moved into the fitting recess 19. In doing so, the sliding movement of the side support frame 11b can be made smoother. Therefore, attachment of the face material 11 can be made easier.

  Moreover, since the opening side of the fitting recess 19 in the support member 18 is a free end formed so as to be able to swing, the free end can be pushed out using a hand opposite to the hand holding the face member 11. Therefore, the side support frame 11b of the face member 11 can be more easily fitted into the fitting recess 19. Further, the front end of the free end is located closer to the back side than the front end of the portion of the saddle member 9 where the fitting recess 19 is formed. By attaching the face material 11 so as to fill the step between the end portion on the front side of the material 9, the face material 11 and the saddle material 9 are made continuous without any step in a state where they are supported with each other. Can do.

  Moreover, since the tension member 12 having the front tension member 28 located on the front side of the chair 1 with respect to the face member 11 is provided, the fitting recess 19 is shielded by the tension member 12, so that the chair 1 is viewed from the front side. It is possible to prevent the fitting recess 19 from being visually recognized.

  In the chair 1 of this embodiment, when the backrest 6 is assembled, it is easy to attach the face material 11 to the frame member 10, and thus the chair is excellent in assembling workability.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.
For example, in the above-described embodiment, the lower end portion of the front-side tension member 28 and the lower end portion of the back-side tension member 29 are attached to the lower frame portion 14 via the front-side tension core material 33 and the rear-side tension core material 34, respectively. However, for attachment to the lower frame portion 14 of the lower end portion of the front side tension member 28 and the lower end portion of the back side tension member 29, an appropriate member other than the front side backing core material 33 and the rear side tension core material 34 is used. You may go.

  Moreover, in the said embodiment, as shown in FIG. 5, although the transition surface 22 was formed in the site | part from the edge part of the front side (front side of the chair 1) of the saddle material 9 to the opening end of the fitting recessed part 19. The present invention is not limited to this. For example, the transition surface 22 may be formed in the fitting recess 19. By forming in this way, the side support frame 11b (fitting convex part) can be easily fitted to the back side of the fitting concave part 19. Further, when the transition surface 22 is formed up to the fitting recess 19 as described above, the front side of the saddle member 9 and the opening end of the fitting recess 19 may be formed on the same surface in the front-rear direction. .

DESCRIPTION OF SYMBOLS 1 ... Chair, 6 ... Backrest (chair load support member), 9 ... Saddle material, 10 ... Frame member, 11 ... Face material, 11b ... Side support frame (fitting convex part), 12 ... Tension material (exterior) Material), 16 ... side part support part (support part), 18 ... support material, 19 ... fitting recessed part, 20b ... retaining protrusion part, 21a ... folded part, 22 ... transition surface, 28 ... front side tension material

Claims (7)

A load supporting member for a chair provided in the chair,
A frame member as a strength member provided with a pair of collars spaced apart in parallel in the width direction of the chair;
A face material supported by the frame member,
Each of the pair of saddle members is provided with a support portion having a fitting recess that opens to the front side of the chair on each of inner surfaces facing each other.
The face material has a fitting convex portion, and the fitting convex portion is supported by the supporting portion by fitting into the fitting concave portion of the supporting portion,
In the support portion, the opening of the fitting recess is narrowed as it goes from the front side of the chair to the inside of the fitting recess on the outer periphery of the opening of the fitting recess as it goes to the back side of the chair. A load supporting member for a chair, characterized in that a transition surface inclined to the surface is formed.   A retaining portion is provided between the fitting recess and the fitting protrusion of the face material to prevent the fitting protrusion from slipping out of the fitting recess by locking each other. The load supporting member for a chair according to claim 1, wherein   The retaining portion is formed by a folded portion formed at a rear end of the fitting convex portion, and a retaining convex portion that is formed at the innermost portion of the fitting concave portion and engages with the folded portion. The chair load support member according to claim 2, wherein the chair load support member is provided.   The transition surface is provided on the outer surface side of the saddle member from the fitting recess, and is formed in a cross-sectional view arc shape that bulges on the front side of the chair and toward the inner side surface of the saddle member. The load supporting member for a chair according to any one of claims 1 to 3, wherein the chair is supported. The support portion includes the saddle material and a support material disposed with a gap on the inner surface side of the saddle material, and the gap between the saddle material and the support material is the fitting recess. And
The support material is a free end formed such that the opening side of the fitting recess is swingable,
The front end of the chair at the free end is positioned closer to the back side of the chair than the front end of the chair at the portion forming the fitting recess in the saddle. The load support member for chairs as described in any one of Claims 1-4 characterized by these.   It is supported by parts other than the above-mentioned fitting recessed part in the above-mentioned collar material, and is provided with the exterior material which has the front side tension material located in the front side of the above-mentioned chair rather than the above-mentioned face material. The load supporting member for a chair according to one item. The chair provided with the load supporting member for chairs as described in any one of Claims 1-6 as a backrest by which the said saddle material is arrange | positioned along an up-down direction.

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