JP6552083B2 - Chair load bearing member and chair - Google Patents

Description

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

  Conventionally, as a chair including a load supporting member for a chair in which a tension member having an elastic resistance (repulsive force) 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, a patent Some are disclosed in Document 1. In the chair disclosed in Patent Document 1, high tension in the vertical direction is secured by the warp group constituting the structure of the tension material, and stretching force in the lateral direction is secured by the weft group consisting of the molding yarn and the elastic yarn. Yes.

  Based on such a configuration, in the chair described above, a good sitting feeling can be obtained in which appropriate elastic resistance and expansion and contraction are compatible. However, on the other hand, in order to maintain the minimum strength, a warp group is essential, and from the viewpoint of adding a stretching force to this, a weft extending in the left and right direction is added to be warped by being stretched. There is a tendency that a design in which a large number of dot-shaped gaps are formed in between, and the degree of freedom in terms of design tends to be lacking while being a member that constitutes the appearance.

  In order to solve such problems, it is conceivable to adopt the configuration as disclosed in Patent Document 2. In the chair disclosed in Patent Document 2, two grooves having different directions are formed in the base material, and by attaching different tension materials to each groove, a plurality of tension materials are stretched on the frame member. ing. With such a configuration, for example, an irregular design such as adopting a strong tension material as the back surface side tension material and adopting a weak tension material as the front surface side tension material becomes possible. Freedom is increased.

Japanese Patent No. 4061167 JP 2013-198565 A

  However, in the configuration disclosed in Patent Document 2, since the plurality of grooves are formed in different directions on the frame member, the shape of the frame member and the shape of the mold for molding it become complicated. There is.

  The present invention has been made in view of the above-mentioned problems, and a load for a chair in which the degree of freedom in design of the tension material is enhanced by supporting a plurality of tension materials without complicating the shape of the frame member. It aims at providing a supporting 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 including a pair of rattan members spaced apart and substantially parallel to each other in the width direction of the chair. And a front-side tension member disposed on the load-receiving surface side of the chair and a back-side tension member disposed on the opposite side of the load-receiving surface, both in one end edge in the length direction of the saddle member and in the width direction Is formed into a bag shape having an opening continuous with the width direction on the other end side in the length direction, and the frame member is formed with the frame member through the opening. and a sheathing material which is supported by the frame member in a state wound around directly to the杆材in Rukoto is covered from one end side in the length direction, wherein the pair of杆材, the inner surface facing each other Each is provided with a support, and between the pair of saddles Characterized in that the interior material having a repulsive force against the load in the orthogonal direction is spanned by being supported by the support portion.

  According to the load supporting member for a chair, the facing direction between the pair of rib members separately from the exterior material formed in a bag shape by joining the front side tension material and the back side tension material, which are put on the frame member Since the interior material has a repulsive force against the load of the interior, for example, by setting the strength of the interior material to a size that can support the load of the seated person, the material of the exterior material is appropriately selected. Therefore, the degree of freedom in design is greatly improved. In addition, since the exterior material is supported by the frame member by being wound around the brazing material with its own shape and tension, there is no need for a dedicated support portion, and therefore the cost is low without complicating the shape of the brazing material. The frame member can be formed. In addition, by covering the support portion formed on the inner side surface of the brazing material with the exterior material, the appearance portion is prevented from being damaged by the support portion.

Preferably, in the chair load support member, the support portion has a fitting recess opened to the load receiving surface.
According to this configuration, since the support portion is a fitting recess formed on the inner surface of each saddle member and opening to the load receiving surface side of the chair, the shape of the saddle member having such a fitting recess portion is At the time of making, it is possible to easily form the two molds by arranging them in the direction perpendicular to the load receiving surface, so that the frame member can be formed at a lower cost.

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 end portion on the load receiving surface side of the support member is more than the end portion on the load receiving surface side of the portion forming the fitting recess portion in the saddle material. It is preferable that the load receiving surface side be located on the side opposite to the side.
According to this configuration, the end on the load receiving surface side of the support member is positioned closer to the side opposite to the load receiving surface side than the end on the load receiving surface side of the portion forming the fitting recess in the brazing material Therefore, the position of the interior material is offset to the back side of the chair than the end on the load receiving side of the timber. Therefore, the interior material comes into contact with the front-side tension material of the exterior material from the back, and deformation of the exterior material is prevented, so that the appearance is more excellent.

Further, in the load support member for a chair, the repulsive force of the exterior material to the load in the surface normal direction is relatively smaller than the repulsive force of the interior material to the load of the surface normal direction. It is preferable that
According to this configuration, the exterior material is relatively soft (less elastic resistance) than the interior material because the bag-like exterior material has a smaller repulsive force than the interior material, and therefore the weight of the seated person is Even if a load is applied to the exterior material due to the above, a frictional resistance is less likely to be generated between the exterior material and the brazing material. Further, since the exterior material is soft, it comes into contact with the saddle material without being in close contact with it, and therefore, it does not rotate with respect to the saddle material even with respect to a load from the direction perpendicular to the surface, so that the generation of frictional noise is prevented or suppressed. Also, although a relatively hard interior material secures a force to support the seated person's body, this interior material may be interfered with the bag-like exterior material since it is installed between the facing surfaces of the brazing material. Absent.

In the chair load support member, a spacer face material is disposed between the front tension member and the interior material, and a repulsive force against the load in the perpendicular direction of the spacer face material. Is preferably relatively smaller than the repulsive force of the interior material against the load in the in-plane direction.
According to this configuration, the spacer face material, which has a smaller repulsive force than the interior material, is disposed between the front side tension material and the interior material, so the seat occupant can chair his / her weight via the front side tension material. When added to the load support member, the load support member for a chair supports the weight of the seat occupant by the interior material in a state in which the deflection of the spacer surface material is added to the deflection of the exterior material. The softness at the time of sitting increases and the feeling of sitting becomes better. In addition, the spacer face material makes it difficult for the upper edge portion of the exterior material to directly hit the upper edge portion of the interior material, and therefore the upper edge portion of the exterior material extends even when used continuously for a long time. It is suppressed.

Moreover, the said load support member for chairs WHEREIN: It is preferable that the said spacer face material covers continuously from the surface side of the said interior material to the surface side of the said collar member.
According to this configuration, since the spacer face material continuously covers from the surface side of the interior material to the surface side of the eaves material, the spacer face material fills the space between the interior material and the eaves material. Almost no influence of the step between. Therefore, there is no possibility that an uncomfortable feeling is generated on the seated person's back due to the step.

Moreover, in the load support member for a chair, it is preferable that the spacer face material is integrally attached to the back surface of the front side stretch material.
According to this configuration, since the spacer face material is integrally attached to the back surface of the front side tension material, the frame member is covered with the exterior material by attaching the spacer face material to the front side tension material in advance. Thus, the process of assembling the chair load support member can be easily performed without hindrance.

The chair according to the present invention is characterized in that the chair load support member is provided as a backrest in which the saddle member is disposed along the vertical direction and the opening is disposed at the lower end.
According to this chair, the degree of freedom in design is greatly improved, and the frame member can be formed at low cost without complicating the shape of the brazing material.

According to the load support member for a chair of the present invention, the exterior member and the interior material can be supported by the frame member without complicating the shape of the frame member, and therefore the degree of freedom in design is increased. Can do.
According to the chair of the present invention, the degree of freedom in design is greatly improved, and the frame member can be formed inexpensively without complicating the shape of the brazing material.

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 an AA line arrow directional cross-sectional view 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 the DD arrow sectional view taken on the line of FIG. 4 (a). It is principal part sectional drawing of the backrest used as other embodiment of the load supporting member for chairs concerning this invention.

  Hereinafter, an embodiment of a chair concerning the present invention is described in detail based on a drawing. In the following description, the direction in which the front of a person sitting in a regular posture on the chair 1 is referred to as "front" or "front", and the opposite direction is referred to as "rear" or "back" To do. In addition, for "upper", "lower", "left" and "right", the upper direction of the person sitting in the chair in the normal posture is called "upper" 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 vertical direction, and the horizontal direction is called the horizontal 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. A seat support member 5 for supporting the seat body 4 and a backrest 6 for supporting the back of a seat occupant who has extended from the support base 3 to the rear upper side and is seated on the seat body 4 are configured.

  The leg 2 is provided with a multi-leg 7 with a caster 7a and a pedestal 8 which is erected from the central part of the multi-leg 7 and incorporates a gas spring which is an elevating mechanism. It is attached. The support base 3 incorporates a lift adjustment mechanism of the pedestal 8 and a tilt adjustment mechanism of the backrest 6.

  The backrest 6 is an embodiment of the load supporting member for a chair according to the present invention, and 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 and right direction) of the chair 1. And a frame member 10 having a pair of ribs 9 arranged substantially in parallel, a face 11 (interior material) bridged between the pair of ribs 9 and 9, and a pair of ribs 9 and 9 , And an armrest 13 attached to each side 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. The lower frame portion 14 is provided, and the connecting frame 15 is attached to the upper end portion (one end portion) of the pair of wedge members 9 and 9. Further, 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 connecting portions between the pair of wedge members 9, 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 convex part), and lower support frame 11c provided in the lower end of face material main part 11a. The side support frame 11 b and the lower support frame 11 c are attached toward the rear (rear direction) of the face material 11 by stitching 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.

  The side support portions 16 are respectively provided on the mutually facing inner side surfaces of the pair of wedge members 9 and 9, as shown in FIG. 5 which is a sectional view taken along the line A-A in FIG. And a thin plate-like support 18 disposed along the brazing material 9 with a gap on the inner side surface side of the brazing material 9. That is, the gap formed between the rib 9 and the support 18 is a fitting recess 19 for attaching the side support frame 11 b of the facing 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 is open on the front side (front side) of the chair 1, that is, on the side receiving the load of the seated person (load receiving side), and as shown in FIG. A side support frame 11b of the material 11 is fitted. As shown in FIG. 3, a plurality of (six in FIG. 3) claws 21 are formed on the rear end of the side support frame 11b. The claws 21 respectively enter the mounting openings 20a of the mounting plate 20 and are engaged with the retaining projections 20b of the brazing material 9 shown in FIG.

  That is, after the claws 21 project rearward from the rear end of the side support frame 11b and are further bent outward in the width direction of the chair 1, the claws 21 are formed so as to be folded back to the front side. The portion 21 a) is locked to the retaining projection 20 b formed at the innermost portion on the back side of the saddle member 9, so that the side support frame 11 b is prevented from coming out of the fitting recess 19. 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 passing over the retaining convex portion 20b, the folded back portion 21a elastically returns and is engaged with the retaining convex portion 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 of such a side support frame 11b and the retaining projection 20b formed at the deepest portion of the fitting recess 19, the retaining prevention according to the present invention Portions, that is, locking portions with each other form a retaining portion that prevents the side support frame 11b from coming out of the fitting recess 19.

  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 is done.

  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 at a position from the end of the front side (the front side of the chair 1) of the brazing material 9 to the opening end of the fitting recess 19. In order to narrow the opening of the fitting recess 19 as it goes to the back side of the chair 1, it is formed so as to be closer to the open end of the fitting recess 19. In the present embodiment, the transition surface 22 is provided on the inner surface side of the rib 9 forming the fitting recess 19 and on the front side of the rib 9 (front side of the chair 1) and on the inner surface of the rib 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 in the fitting recess 19 by guiding the inclination (transition surface 22) by abutting on the transition surface 22 and then sliding along the inclination of the 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.

  Further, the support member 18 is a free end (free end) formed so as to be able to swing on the opening side of the fitting recess 19 (the front side of the chair 1). 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 tip end (end on the front side of the chair 1) at the free end of the support 18 is the end face (end on the front side (front side of the chair 1) of the part forming the fitting recess 19 in the rib 9 It 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 surface side of the tension member 12 comes into contact from the back side, and deformation of the tension member 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. That is, between the claws 23 of the lower support frame 11c and the attachment openings 24 of the lower support 17 as well, the structure is the same as the folded back portion 21a of the claws 21 and the retaining projection 20b described above. The lower support frame 11 c is fixed to the lower frame 14 by the stopper portion formed on the lower support frame 11 c. By fixing the side support frames 11 b and 11 b and the lower support frame 11 c to the frame member 10 as described above, 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) to which the face material main body 11a is applied by the back of a seated person, that is, a load in a plane perpendicular direction 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. 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. The recess 25 is formed to the inside of the brazing material 9 as shown in FIG. 6 which is a cross-sectional view taken along the line B-B in FIG. 4A, and in the present embodiment the opening of the recess 25. 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 the recess 25, a connecting plate 32 is provided which connects side openings of the tension member 12 described later. Further, a through hole 13a for attaching a bolt 27 to the inside of the armrest 13 is formed, and a cover plate 13b for closing the through hole 13a is attached to the opening outside 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). A substantially rectangular backside stretch material 29 to be disposed is formed in a bag shape, and is formed of, for example, acrylic, wool (including a mixture thereof), polyester, or the like, as shown in FIGS. 1 and 2. As shown in FIG. As shown in FIG. 3, in this tension member 12, the front side tension member 28 and the back side tension member 29 are sewn at both the upper end edge (one end edge) in the lengthwise direction of the brazing material 9 and the side 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 side of both side edges of the tension member 12.

  As shown in FIG. 3 and FIG. 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.

  The connecting plate 32 is formed with the bending portion 32a at the center in the length direction, so that the length on one side of the bending portion 32a and the length on the other side are formed substantially the same. 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 is substantially the same as the length of the portion forming the opening 30a. 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 connection plate 32 is placed on the tension material whose front side is the front side, and the connection plate 32 is in a state where the tension material is down and the connection plate 32 is up, that is, in a state where the connection plate 32 can be visually recognized. Sut on the tension material. 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. Then, the tension material is reversed, and the other side of the connecting plate 32 is sewn to the back surface side of the other tension material in the same manner as in the case of the one tension material described above. Thereafter, the portions forming the side openings 30a of the front side tension member 28 and the back side tension member 29 sewn to the connecting plate 32 are folded from the outside to the inside together with the connecting plate 32 as shown in FIG. Put in. Thereby, the connection 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 connection plate 32 is inserted into the recess 25, the connection plate 32 may be disposed in a state of being in proximity to the inner surface of the recess 25 without contacting the connection plate 32.

  Further, as shown in FIG. 3, the front back tension core 33 is attached to the back surface of the lower end portion of the front side tension member 28 in the opening 30 of the tension member 12, and the back side back tension is attached to the front surface of the lower end portion A core member 34 is attached. The front back tensioning core material 33 and the back side back tensioning core material 34 are thin plate-like ones made of resin or the like, and are attached to the front side tension material 28 or the back side tension material 29 by stitching or the like. The front back tensioning core material 33 has a plurality of engaging portions (not shown) formed on the inner surface (rear surface) thereof. 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, on the inner back surface (front surface) of the rear side back tensioning core material 34, a plurality of engaging portions (not shown) are formed. 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. It is done. By attaching the front back lining 33 and the rear back lining 34 to the lower support 17, the opening 30 of the bag-like covering 12 is closed by the lower frame 14. The opening 30 is not exposed.

  In addition, in the tension member 12, the front-side tension member 28 and the back-side tension member 29 are joined slightly inward from the outer end in the width direction of the chair 1 at the end edge portion (upper end edge) of the upper end edge side (one end edge side) 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. It is done.

  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 protruding edge portion 9 b is formed in an annular shape continuously on the entire outer circumferential portion surrounding the fitting hole 9 a in the circumferential direction. Therefore, the projecting edge 9 b abuts not only on the extra length portion 35 of the tension member 12 but also on the entire outer periphery 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. And 38, and the pair of closing portions 37, 37 are attached to the corresponding wedge members 9, respectively, thereby connecting the pair of wedge members 9, 9 to each other.

  As shown in FIG. 8, the closing portion 37 is located on the fitting projection 37 a that fits through the exposure port 36 into the fitting hole 9 a and on the base side (upper end side) of the fitting projection 37 a. And a cover portion 37b extending outward. The covering portion 37b is provided on the projecting edge portion 9b of the rib 9 through the outer peripheral portion of the exposure port 36 including the extra length portion 35 of the tension member 12 in a state where the fitting projection 37a is fitted in the fitting hole 9a. I'm hitting. The fitting protrusion 37a is a tubular member having a hole inside, and a nut is accommodated in the hole as 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. Then, the screw 39 is further inserted into the fitting projection 37a fitted in the fitting hole 9a, and screwed to the nut 40 accommodated in the hole. Thereby, the fitting projection 37 a is screwed into the fitting hole 9 a of the wedge member 9 and fixed.

The attachment of the connecting frame 15 and the tension member 12 to the pair of brazing materials 9, 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 material 12 is turned over in a state in which the fitting projections 37 a are thus protruded from the exposure ports 36, 36. 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 in the fitting hole 9a of the brazing material 9, as shown in FIG. 8, the fitting protrusion 37a is fitted in the fitting hole 9a of the brazing material through the exposure port 36 of the tension member 12. And the cover 37b abuts on the entire outer periphery of the exposure opening 36 and abuts on the projecting edge 9b of the brazing material 9 via the extra length 35 etc. The extra length portion 35 and the like of the tension member 12 are aligned. As a result, even when the tension member 12 is stretched greatly, the positional deviation between the exposure port 36 and the brazing material 9 is suppressed.

  After the fitting projections 37a are screwed in this way and the connecting frame 15 is attached to the pair of ribs 9, 9, and fixed, the overturned tension member 12 is returned to the original and covered on the pair of ribs 9, 9. . At this time, since the opening 30 of the tension member 2 has the side opening 30 a, the opening of the bag-like tension member 12 can be widely expanded, and therefore the tension member 12 can be easily covered on the frame member 10 Can do. Thus, by returning the tension material 12 which has been reversed, the bag-like tension material 12 has one end side (upper end) in the length direction to the brazing material 9, 9 (frame member 10) through the opening 30 Side). Therefore, the screw 39 fixing the fitting projection 37a is hidden in 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 30 a of the tension member 12 and the connecting plate 32 are hidden without being exposed.

  In addition, the front back tensioning core material 33 and the back side back tensioning core material 34 attached to the opening 30 of the tension material 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. Also, by attaching the backrest 6 to the support base 3 in this manner, the front back tensioning core material 33 and the back side back tensioning core material 34 attached to the opening 30 of the tension material 12 are stretched without being exposed. It is stored in the material 12.

  In the chair load support member (backrest 6) of the present embodiment, the repulsive force against the load in the perpendicular direction between the saddle members 9 and 9, separately from the tension member 12 covered on the frame member 10. Since the face material 11 having the structure is installed, for example, by setting the strength of the face material 11 to a size that can support the load of the seated person, it is possible to appropriately select the material of the upholstery material 12 and the like. Become. Therefore, the degree of freedom in design can be greatly improved. In addition, since the tension member 12 is supported by the frame member 10 so as to be wound around the reinforcing material 9 with its own shape and tension, a dedicated support portion is not necessary, thus complicating the shape of the reinforcing material 9 Therefore, the frame member 10 can be formed inexpensively. In addition, the side support portions 16 formed on the inner side surface of the brazing material 9 can be covered with the reinforcement members 12 to prevent the appearance of the side support portions 16 from being damaged.

  Moreover, since the side part support part 16 is the fitting recessed part 19 formed in the inner surface of each saddle member 9, when making the shape of the saddle member 9 which has such a fitting recessed part 19, two gold | metal | moneys are used. It can be easily molded by arranging and molding the mold in the direction perpendicular to the load receiving surface. Therefore, the frame member 10 can be molded at a lower cost.

  Further, the end portion on the load receiving surface side of the support member 18 is positioned closer to the side opposite to the load receiving surface side than the end portion on the load receiving surface side of the portion where the fitting recess 19 is formed in the saddle material 9. Therefore, the position of the face material 11 is retracted (offset) to the back side of the chair 1 from the end of the saddle material 9 on the load receiving surface side. Therefore, since the deformation of the tension member 12 is prevented by the face material 11 coming in contact with the front side tension member 28 of the tension member 12 from the back side, the appearance is more excellent.

  Further, since the bag-like tension material 12 has a smaller repulsive force than the face material 11, the tension material 12 is relatively softer (less elastic resistance) than the face material 11, and therefore the weight of the seated person Even if a load is applied to the tension member 12 due to the above, a frictional resistance is less likely to occur between the tension member 12 and the brace material 9. Further, since the upholstery material 12 is soft, it comes into contact with the saddle material 9 without being in close contact therewith, and therefore it does not rotate with respect to the saddle material 9 even with respect to a load in a direction perpendicular to the surface, thereby preventing or suppressing the generation of friction noise. Is done. In addition, although the force to support the seated person's body is secured by the relatively hard face material 11, this face material 11 is bridged between the facing surfaces of the brazing material 9, so There is no interference.

  In the chair 1 of the present embodiment, since the backrest 6 having a high degree of freedom in design is provided, the freedom in design of the chair 1 itself is also greatly improved. In addition, since the frame member 10 can be formed at low cost without complicating the shape of the saddle member 9, the cost of the chair 1 itself can be reduced.

Next, another embodiment of the chair load support member according to the present invention will be described.
FIG. 10 is a cross-sectional view of the main part of the backrest 50 to be a load supporting member for a chair according to the present invention, that is, a cross-sectional view corresponding to FIG. 5 in the embodiment (A-A arrow in FIG. 4 (a) FIG.

  The difference between the backrest 50 of the present embodiment and the backrest 6 of the above embodiment is that a spacer face material 51 is disposed between the front side tension member 28 and the face material (interior material) 11 as shown in FIG. It is a point that The spacer face material 51 is formed of, for example, a non-woven fabric or an elastomer, and the load (body weight) applied by the seater's back, that is, the repulsive force to the load in the direction perpendicular to the face It is formed to be relatively smaller than the same repulsive force of the main body 11a. In addition, with respect to the same repulsive force in the front side tension member 28 of the repulsive force of the spacer face material 51, it may be relatively larger, smaller, or equal.

  Such a spacer face material 51 is formed in a rectangular shape having substantially the same shape and the same size as the front side tension member 28 shown in FIG. 3 and FIG. 7 and has four sides, that is, the upper end edge and both side edge portions The lower end edge is sewn to the front side tension member 28 and integrally attached to the front side tension member 28. That is, as shown in FIG. 10, at each side edge of the front side tension member 28, each side edge of the spacer face material 51 is folded back together with each side edge of the front side tension member 28 and sewed in that state This is integrally attached to the front lining material 28.

  Further, the upper end edge and the lower end edge of the spacer face member 51 are also integrally attached to the upper end edge and the lower end edge of the front side tension member 28 in the same manner as the side end edges. And each side edge and upper end edge of the front side tension member 28 to which the spacer face material 51 is integrally attached in this way, each side edge and back edge of the back side tension member 29 similarly folded back and stitched The upper edge portion is further stitched and integrated, whereby the tension member 12 to which the spacer face material 51 is integrally attached is formed.

  The tension member 12 having the spacer face material 51 formed in this manner is placed on the frame member 10 in the same manner as in the above embodiment. That is, the frame member 10 is covered from the upper end side of the frame member 10 through the opening 30 shown in FIG.

In addition to the same effect as the backrest 6 of the said embodiment, the load support member for chairs (backrest 50) of this embodiment has the following effects.
That is, since the spacer face material 51 having a repulsive force smaller than that of the face material 11 (face material body 11a) is disposed between the front side tension material 28 and the face material 11, the seated person can use the front side tension material 28. When the weight is applied to the backrest 50 via the backrest 50, the backrest 50 supports the weight of the seat occupant by the face member 11 in a state in which the deflection of the spacer face member 51 is added to the deflection of the front side tension member 28. Since the bending of the material 51 is added, the softness at the time of sitting increases and the feeling of sitting becomes better. In addition, the interposition of the spacer face material 51 makes it difficult for the upper edge of the tension member 12 to directly contact the upper edge of the face material 11, and therefore the upper edge of the face material 11 even if used continuously for a long time Is prevented from extending.

Further, since the spacer surface material 51 continuously covers from the surface side of the surface material 11 to the surface side of the brazing material 9, the spacer surface material 51 fills the space between the surface material 11 and the brazing material 9. Therefore, the influence of the step between them is almost eliminated. Therefore, there is no possibility that an uncomfortable feeling is generated on the seated person's back due to the step.
In addition, since the spacer face material 51 is integrally attached to the back surface of the front side tension material 28, the tension material 12 is attached to the frame member 10 by attaching the spacer face material 51 to the front side tension material 28 in advance. The process of assembling the backrest 50 can be easily performed without hindrance.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the bag-like tension member 12 is configured to have a smaller repulsive force than the face material 11, but the repulsive force of the tension material 12 may be equal to the repulsive force of the face material 11. Furthermore, it may be made larger than the repulsive force of the face material 11.

  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, using appropriate members other than the front side back tension core 33 and the back side back tension core 34 You may go.

  Further, as the face material 11 (interior material), the face material body 11a does not form a continuous and continuous surface as shown in FIG. 3, for example, the face material body has a shape having a slit. Also good. Specifically, a plurality of slits (for example, 2 to 5) in the vertical direction may be formed at substantially equal intervals in the vertical direction, and the slits may be formed in a strip shape. By forming the slits in this manner, the flexibility of the facing material (interior material) can be enhanced. Even when the slits are formed in this way, the face material body can be formed of a resin (elastomer) such as nylon or polypropylene. Further, the side support frame 11b and the lower support frame 11c constituting the face material (interior material) may be formed integrally with the face material body by bending the end portion of the face material body.

DESCRIPTION OF SYMBOLS 1 ... chair, 6 ... backrest (load support member for chairs), 9 ... rib material, 10 ... frame member, 11 ... surface material (interior material), 12 ... tension material (exterior material), 16 ... side support part (Support part), 18 ... support material, 19 ... fitting recess, 28 ... front side tension material, 29 ... back side tension material, 50 ... backrest (chair load support member), 51 ... spacer face material

Claims (8)

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;
The front side tension member disposed on the load receiving side of the chair and the back side tension member disposed on the opposite side of the load receiving surface are one end edge in the lengthwise direction of the rib and both sides in the width direction It is joined at an end edge and is formed in a bag shape having an opening continuous with the width direction on the other end edge side in the length direction, and the length of the frame member is transferred to the frame member through the opening and a sheathing material which is supported by the frame member in a state wound around directly to the杆材in Rukoto is covered from one end side in the direction,
In the pair of ribs, supporting portions are provided on the inner side surfaces facing each other,
An interior material having a repulsive force against a load in a direction perpendicular to a plane is supported by the support portion and bridged between the pair of cage members.   The load support member for a chair according to claim 1, wherein the support portion has a fitting recess opened to the load receiving surface side. 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 end on the load receiving surface side of the support member is positioned closer to the side opposite to the load receiving surface side than the end on the load receiving surface side of the portion forming the fitting recess in the brazing material The load supporting member for a chair according to claim 2, characterized in that:   The repulsive force with respect to the load in the direction perpendicular to the surface of the exterior material is relatively smaller than the repulsive force with respect to the load in the direction perpendicular to the surface of the interior material. The load supporting member for chairs as described in any one of -3. A spacer face material is disposed between the front tension material and the interior material,
The repulsive force with respect to the load in the perpendicular direction of the spacer face material is relatively smaller than the repulsive force with respect to the load in the perpendicular direction of the interior material. The load supporting member for chairs as described in any one of 1-4.   The load supporting member for a chair according to claim 5, wherein the spacer face material continuously covers from the surface side of the interior material to the surface side of the collar member.   The load support member for a chair according to claim 5 or 6, wherein the spacer face material is integrally attached to the back surface of the front side tension member.   The load supporting member for a chair according to any one of claims 1 to 7 is provided as a backrest in which the saddle member is disposed along the vertical direction and the opening is disposed at the lower end. A chair that features.

Images