WO2015037421A1

WO2015037421A1 - Chair

Info

Publication number: WO2015037421A1
Application number: PCT/JP2014/072117
Authority: WO
Inventors: 益永　浩; 裕一郎 ▲高▼木
Original assignee: 株式会社岡村製作所
Priority date: 2013-09-13
Filing date: 2014-08-25
Publication date: 2015-03-19
Also published as: EP3045086B1; JP6210633B2; CN105530839A; JP2015054213A; CN105530839B; EP3045086A4; EP3045086A1; US20160220036A1

Abstract

A weight supporting member has: a base plate (13) constituting a framework; a cushion (14) disposed on the outer surface side of the base plate (13); upholstery material (15) that is stretched to cover the outer surface side of the cushion (14) and the peripheral edge of the base plate (13); and a tightening cord (18) inserted into the periphery of the upholstery material (15) and tightened to allow end portions to be tied together at the rear surface side of the base plate (13) while the upholstery material (15) covers the outer surface side of the cushion (14) and the peripheral edge of the base plate (13). Provided is a chair configured so that providing a first side wall (24) and a first protruding wall (26) for limiting displacement of the tightening string (18) toward the center of the base plate, and a second side wall (25) and a second protruding wall (27) for limiting displacement of the tightening string (18) toward the outside of the base plate makes it possible to appropriately limit displacement of the tightening string (18) from the peripheral part of the upholstery material (15), and suppress any positional deviation of the upholstery material (15).

Description

Chair

The present invention relates to a chair having an improved attachment portion of a tension member for a load support such as a seat body and a backrest.
This application claims priority based on Japanese Patent Application No. 2013-190952 filed in Japan on September 13, 2013, the contents of which are incorporated herein by reference.

A chair seat used for office work or the like is usually provided with a cushion material such as urethane on the upper part of the substrate constituting the skeleton, and is covered with a sheet-like tension material from the outer surface of the cushion material to the outer edge of the substrate. It has been broken.
When attaching this type of chair upholstery material, it is easy to replace the upholstery material at the time of fouling, etc., and it is easy to apply stable tension to the entire area of the upholstery material. A technique is often used in which the peripheral edge is constricted on the lower surface side of the substrate, thereby fixing the tension material to the cushion material and the substrate (for example, see Patent Documents 1 and 2).

In the chairs described in

Patent Documents

1 and 2, a bag-like insertion hole is provided in the peripheral portion of the tension member that wraps the outer side surface of the cushion material and the outer peripheral portion of the substrate, and a tightening string is inserted into the insertion hole. Thus, the ends of the fastening string are bound on the lower surface side of the substrate. On the lower surface side of such a chair, a locking projection for restricting the displacement of the fastening string toward the center of the substrate is provided, thereby preventing the displacement of the tension material.
In such a chair, the tension member can be easily attached to the cushion material and the substrate by fastening the fastening string in a loop shape on the lower surface side of the substrate and binding the ends together. In addition, by managing the length of the binding portion of the fastening string, it is possible to reduce variations in tension acting on the tension material.

Japanese Patent No. 3728576 Japanese Patent No. 4255670

In the chairs described in

Patent Documents

1 and 2, the locking protrusions are formed only in the direction of receiving the tightening string that is to be narrowed inward. However, when the tension material is actually stretched between the cushioning material and the substrate, not only the direction in which the peripheral edge of the tension material tightened by the tightening string tends to squeeze inward, but also spread outward. It has been found that the direction is also displaced.
As a cause of this, for example, when the substrate or cushion material is substantially rectangular in plan view, if the peripheral portion of the tension member is tightened by the fastening string, the substrate or cushion material on the peripheral portion of the tension member is The part corresponding to the vicinity of the corner is most strongly pulled by the fastening string. However, the tensile force is relatively weak at the portion corresponding to the vicinity of the straight portion between the adjacent corners on the peripheral edge of the tension member. Therefore, it is predicted that the part will be displaced so as to partially spread outward due to the tension of the tension member.

Therefore, an object of the present invention is to provide a chair that can appropriately regulate the displacement of the fastening string and the peripheral portion of the upholstery material and suppress the displacement of the upholstery material.

In order to solve the above-described problems, a chair according to the present invention includes a board that forms a skeleton part, a cushion material that is disposed on the surface side of the board, and a covering that covers at least the outer surface of the cushion material and the outer peripheral edge of the board. And a tightening string that is inserted into the peripheral edge of the tension material and is tightened on the back side of the substrate to bind the ends together with the tension material covering the outer peripheral surface of the cushion material and the outer peripheral edge of the substrate In a chair provided with a load support having a strip, the substrate includes a first locking means for restricting displacement of the tightened tightening cord in the direction of the center of the substrate, and a tightened tightening cord And second locking means for restricting displacement in the substrate outer direction.
As a result, when the fastening string inserted through the peripheral edge of the tension member is tightened on the back side of the substrate with the tension material covering the outer side surface of the cushion material and the outer peripheral edge of the substrate, the tightening string The displacement in the substrate center direction is regulated by the first locking means, and the displacement of the fastening string in the substrate outer direction is regulated by the second locking means. Therefore, not only the displacement that tends to squeeze inside the peripheral edge of the tension member, but also the displacement that tries to spread outward is regulated.

The substrate is formed in a substantially rectangular shape having corners at the four corners and straight portions between the corners, the corners are provided with first locking means, and at least some of the straight portions have a second portion. The locking means may be provided.
In this case, with the tension material covering the outer side surface of the cushion material and the outer peripheral edge of the substrate, when the tightening string inserted through the peripheral edge of the tension material is tightened on the back side of the substrate, the corner of the substrate Then, the fastening string tends to be displaced in a direction in which it is narrowed inward, and in a part of the straight portion of the substrate, it is attempted to be displaced in a direction in which the tension material spreads outward. At this time, each displacement of the fastening string is regulated by the first locking means and the second locking means. Therefore, it is possible to appropriately prevent the tension material from being twisted at any part of the substrate.

The first locking means includes a first side wall projecting backward from the back surface of the substrate, and a first projecting wall projecting outward from the vicinity of the projecting end of the first side wall. The stopping means may include a second side wall projecting backward from the back surface of the substrate and a second projecting wall projecting inward of the substrate from the vicinity of the projecting end of the second side wall.
In this case, the peripheral portions of the tightening string and the tension member are reliably regulated by the first projecting wall and the second projecting wall. In addition, even when the peripheral portion of the tightening cord or the tension member is not in direct contact with the first projecting wall or the second projecting wall, the displacement of the tightening cord or the tension material is the first side wall or the second side wall. Regulated by.

A concave groove continuous in the circumferential direction of the substrate may be formed on the back surface of the substrate, the first side wall may be constituted by an inner wall of the concave groove, and the second side wall may be constituted by an outer wall of the concave groove.
In this case, at the time of attaching the tension member, the peripheral portion of the tightening cord or the tension member is pushed into the concave groove continuous in the circumferential direction of the substrate while pushing the peripheral portion of the tightening cord or the tension member to the first protruding wall or It can arrange | position inside a 2nd protrusion wall. Therefore, the tension member can be easily attached. Moreover, since the peripheral part of a fastening string or a tension material is arrange | positioned in the ditch | groove which continues in the circumferential direction of a board | substrate, a tension material becomes more difficult to twist.

It is desirable that the first protruding wall and the second protruding wall are arranged adjacent to each other with a distance in the extending direction of the fastening string.
In this case, even if the lengths of the first projecting wall and the second projecting wall are extended, the tips of the first projecting wall and the second projecting wall do not come into contact with each other. For this reason, when the length of the 1st protruding wall and the 2nd protruding wall is fully extended and the peripheral part of a fastening string or a tension material is attached, it makes it easy to bend and deform the 1st protruding wall and the 2nd protruding wall. be able to. Accordingly, this makes it easy to attach the tension material.

The first projecting wall and the second projecting wall that are provided adjacent to each other are located at positions where the first side wall and the second side wall have a length that is substantially half the distance between the first side wall and the second side wall in the direction intersecting with the extending direction of the fastening string. It is preferable that the part extends.
In this case, since the wide range in the pulling direction of the peripheral portion of the tension member and the region where the fastening string is disposed is covered by the first protruding wall and the second protruding wall, the peripheral portion of the tension member is effectively prevented from falling off. can do. Moreover, the operation | work which inserts a tension material between a 1st side wall and a 2nd side wall becomes difficult to be inhibited by the 1st protrusion wall and the 2nd protrusion wall.

The first projecting wall and the second projecting wall may be arranged at positions where the tip portions face each other.
In this case, since the distal end portions of the first projecting wall and the second projecting wall are arranged to face each other, even if the displacement direction of the tightening cord or the peripheral edge of the tension member may change, the tightening cord Displacement of the peripheral portion of the tension member is reliably regulated by either the first protruding wall or the second protruding wall.

The first projecting wall and the second projecting wall may be arranged such that a part of the tip part is opposed to each other and a part of the remaining part is separated in the extending direction of the fastening string.
In this case, even if the displacement direction of the peripheral portion of the tightening cord or the tension member may change, the peripheral portion of the tightening cord or the tension member is caused by either the first protruding wall or the second protruding wall. Displacement is reliably regulated. In addition, since the first protruding wall and the second protruding wall are provided such that only a part of the tip portion is opposed to each other and the remaining part is spaced apart in the direction in which the fastening string extends, the first protruding wall And the second projecting wall extends long along the direction in which the fastening string extends. For this reason, it becomes easy to bend and deform the first projecting wall and the second projecting wall when attaching the fastening string or the peripheral portion of the tension member. Accordingly, this makes it easy to attach the tension material.

According to the present invention, not only the displacement that tends to squeeze inside the peripheral edge of the tension member but also the displacement that spreads outward can be appropriately regulated, so that the displacement of the tension member can be more reliably suppressed. it can.

It is a side view of the chair of 1st Embodiment of this invention. It is a perspective view in the state where the leg part of the chair of a 1st embodiment of this invention was removed. It is a bottom view of the board | substrate of 1st Embodiment of this invention. It is the perspective view which looked at the board | substrate of 1st Embodiment of this invention from the downward diagonal left front side. It is an enlarged view of the V section of FIG. 3 of the seat body of 1st Embodiment of this invention. It is sectional drawing corresponding to the VI-VI cross section of FIG. 3 of the seat of 1st Embodiment of this invention. FIG. 5 is a cross-sectional view of the seat body according to the first embodiment of the present invention corresponding to the VII-VII cross section of FIG. 3. It is a bottom view of the principal part of the board | substrate of the 2nd Embodiment of this invention. It is a bottom view of the principal part of the board | substrate of the 3rd Embodiment of this invention. It is a bottom view of the principal part of the board | substrate of the 4th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the direction indicated by the arrow FR in the figure facing the front of the person seated in the chair in a regular posture is referred to as “front”, and the opposite direction is referred to as “rear”. For “upper”, “lower”, “left”, and “right”, the direction indicated by the arrow UP in the figure above the person sitting on the chair in a regular posture is “up” and the opposite direction is “ The direction indicated by the arrow LH on the left side of the person sitting on the chair 1 in a normal posture is referred to as “left”, and the opposite direction is referred to as “right”.

First, the first embodiment shown in FIGS. 1 to 7 will be described.
FIG. 1 is a side view showing the overall configuration of the chair 1 of this embodiment, and FIG. 2 is a perspective view of the chair 1 with some parts removed, as seen from obliquely below.
As shown in these drawings, a chair 1 according to this embodiment includes a leg 2 placed on a floor F, a box-shaped support base 3 installed at the upper end of the leg 2, and a seated person. A seat body 4, a seat receiving member 5 attached to the upper surface of the support base 3 and supporting the seat body 4, and a back supporting the back of a seated person who extends from the support base 3 to the rear upper side and is seated on the seat body 4. And a drooping portion 6.
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 as a lifting mechanism, and has a support base 3 at the upper end of the pedestal 8. Is mounted so as to be rotatable in the horizontal direction. 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 includes a backrest support frame 9 having a substantially L shape in side view, and a backrest body that directly supports the back of a seated person attached to the front surface of the backrest support frame 9 and seated on the seat 4. 10, and the lower end of the front portion of the back support frame 9 is coupled to the tilt adjustment mechanism in the support base 3.
1 and 2, reference numeral 11 is a pivot shaft of the backrest support frame 9 on the support base 3, and reference numeral 12 is an operation knob of a tilt adjustment mechanism protruding from the side surface of the support base 3. is there. Moreover, the code | symbol 90 in FIG. 1 is an armrest attached to the lower surface of the both sides of the seat body 4 as an additional component.

FIG. 3 is a bottom view of the seat body 4. In this embodiment, the seat body 4 constitutes a load support body of the chair 1 of this embodiment.
The seat body 4 includes a base plate 13 that forms a skeleton, a cushion material 14 made of urethane or the like attached to the top of the base plate 13, and a tension member 15 that covers the outer peripheral surface of the base plate 13 from the outer surface of the cushion material 14. And. In FIG. 3, the upholstery material 15 is indicated by a virtual line for convenience of illustration.

FIG. 4 is a perspective view of the substrate 13 as viewed obliquely from below.
The substrate 13 is made of a synthetic resin having elasticity, and has a substantially rectangular shape with rounded four corners when viewed from above. That is, the substrate 13 has an outer shape in which rounded corner portions 13a are provided at four corners, and linear portions 13b are arranged between the adjacent corner portions 13a. In the substrate 13, a continuous shielding wall 16 that also serves as a reinforcing rib protrudes downward from the lower surface of the peripheral portion excluding the central region of the rear side. The shielding wall 16 functions to conceal that the lower surface of the substrate 13 is visible from the side and restrict excessive deformation of the entire region of the substrate 13. A plurality of reinforcing ribs 23 extending in the front-rear direction and having a low protruding height are provided at substantially equal intervals in the inner region of the lower surface of the substrate 13 than the shielding wall 16.

The substrate 13 is held by a seat receiving member 5 fixed on the support base 3 so as to be slidable back and forth.
As shown in FIG. 2, a lock lever 21 for locking the front-rear position of the seat body 4 is attached to the left side portion of the substrate 13 so as to be tiltable. A plurality of lock holes 35 are formed in the seat receiving member 5, and the sliding position of the substrate 13 is locked when the distal end portion of the lock lever 21 is fitted into the arbitrary lock hole 35. The lock lever 21 is integrally formed with a release operation knob 22 held by the operator on the base end side.

FIG. 5 is an enlarged view of a V portion of FIG. 3, and FIGS. 6 and 7 are cross-sectional views corresponding to the VI-VI cross section and the VII-VII cross section of FIG.
A bag-like insertion hole 17 is provided along the circumferential direction on the peripheral edge 15a of the upholstery material 15 disposed around the lower surface of the peripheral edge of the substrate 13. The insertion hole portion 17 is broken at a part in the circumferential direction of the peripheral edge portion 15a of the tension member 15, and the tightening string 18 is inserted from the broken portion. In the state where the tension material 15 wraps the tension material 15 from the outer side surface of the cushion material 14 to the outer peripheral edge portion of the substrate 13, the fastening string 18 is tightened on the lower surface side of the substrate 13. In this state, both

end portions

18a and 18a are bound with a predetermined tension.

Here, a concave groove 19 extending in the circumferential direction is formed on the lower surface of the outer peripheral edge of the substrate 13, and the peripheral edge 15 a of the tension member 15 is fitted into the concave groove 19 together with the tightening string 18.
The concave groove 19 includes an annular first side wall 24 projecting downward from the lower surface of the substrate 13, and an annular second sidewall 25 projecting downward from the lower surface of the substrate 13 at a position spaced outside the first sidewall 24. , Is formed by. In this embodiment, a part of the first side wall 24 is continuously formed on the root side of the shielding wall 16. In other words, the shielding wall 16 is formed continuously with the protruding end of the first side wall 24.

A plurality of first sidewalls 24 projecting outward from the vicinity of the projecting end of the first sidewall 24 in regions corresponding to the corners 13a of the substrate 13 and regions corresponding to the straight portions 13b. The first protruding wall 26 is provided. On the other hand, in the region corresponding to the straight portion 13b on both the left and right sides of the substrate 13 and the straight portion 13b on the front side of the second side wall 25, from the vicinity of the protruding end of the second side wall 25 toward the inner side of the substrate 13. A plurality of second projecting walls 27 projecting are provided.
In this embodiment, the first side wall 24 and the first protruding wall 26 constitute a first locking means for restricting the displacement of the tightened fastening string 18 in the center direction of the substrate, The 2nd protrusion wall 27 comprises the 2nd latching | locking means which regulates the displacement of the board | substrate outer direction of the tightening string 18 tightened.

The first projecting wall 26 and the second projecting wall 27 provided in the regions corresponding to the straight portions 13b on the left and right sides and the straight portion 13b on the front side extend in the concave groove 19 (in the tightening string 18). They are arranged adjacent to each other with a predetermined distance in the direction. That is, the first protruding wall 26 and the second protruding wall 27 are arranged in a staggered manner with the concave groove 19 interposed therebetween.
Here, the first projecting wall 26 and the second projecting wall 27 provided adjacent to the regions corresponding to the straight portions 13b on the left and right sides and the straight portion 13b on the front side are concave grooves as shown in FIG. Each tip extends to a position that is approximately half the length of the 19 groove widths.

In the chair 1 of this embodiment, when the cushioning material 14 is disposed on the substrate 13 and the tensioning material 15 is attached thereto, first, the tensioning material is applied to the outer side surface of the cushioning material 14 and the outer peripheral edge of the substrate 13. 15, and the peripheral portion 15 a of the tension member 15 is fitted into the concave groove 19 of the substrate 13 together with the fastening string 18 on the lower surface side of the substrate 13. At this time, at each corner portion 13a and the straight portion 13b on the rear side, the fastening string 18 and the peripheral edge portion 15a of the tension member 15 are pushed over the first protruding wall 26 and pushed into the groove 19. On the other hand, in the straight part 13b on both the left and right sides and the straight part 13b on the front side, the fastening string 18 and the peripheral part 15a of the upholstery material 15 are crossed over the first projecting wall 26 and the second projecting wall 27 to form a concave groove. Push into 19.

Next, in this state, both ends of the tightening string 18 drawn out from the insertion hole 17 at the peripheral edge of the tension member 15 are tightened using a special instrument, and in this state, both ends of the tightening string 18 are tightened. Bond together. Note that the tightening of the tightening string 18 can also be performed manually by an operator. Thus, when the both ends of the tightening string 18 are tightened, the tightening string 18 and the peripheral edge 15a of the tension member 15 are the base material in the regions corresponding to the respective corner portions 13a and the rear straight portion 13b of the substrate 13. In the region corresponding to the straight portions 13b on both the left and right sides of the substrate 13 and the straight portion 13b on the front side, the fastening string 18 and the peripheral portion 15a of the tension member 15 are partially formed on the base material. Displacement in the outward direction, and in other parts, it tends to be displaced in the direction of the center of the substrate. At this time, the displacement of the fastening string 18 and the peripheral portion 15a of the tension member 15 in the center direction of the substrate is regulated by the first side wall 24 and the first protruding wall 26, and the peripheral portion of the tightening string 18 and the tension member 15 The displacement of 15 a in the substrate outer direction is regulated by the second side wall 25 and the second protruding wall 27.

As described above, in the chair 1 according to this embodiment, in addition to the first side wall 24 and the first projecting wall 26 which are the first locking means, the second surface is formed on the lower surface of the substrate 13 of the seat body 4. Since the second side wall 25 and the second projecting wall 27 that are the locking means are provided at appropriate positions, not only the displacement that tends to squeeze inside the peripheral edge portion 15a of the tension member 15 but also the outer side tends to spread outward. Displacement can also be regulated appropriately. For this reason, it is possible to more reliably suppress the stretching of the upholstery material 15 in various directions.

In particular, in the chair 1 according to this embodiment, the second side wall 25 and the second protrusion are formed on the straight portions 13b on both the left and right sides and the straight portion 13b on the front side of the thick substrate 13 of the cushion material 14 stacked on the upper surface. Since the wall 27 is provided, it is possible to appropriately regulate the displacement that tends to spread to the outside of the peripheral edge portion 15a of the tension member 15 due to the tightening of the tightening string 18.

In the chair 1 according to this embodiment, the first locking means is constituted by the first side wall 24 and the first protruding wall 26, and the second locking means is the second side wall 25 and the second protruding wall. 27, it is possible to reliably regulate the removal of the peripheral edge portion 15 a of the tension member 15 from the concave groove 19 by the first protruding wall 26 and the second protruding wall 27. In addition, even when the peripheral portion 15a of the tightening string 18 or the tension member 15 is not in direct contact with the first projecting wall 26 or the second projecting wall 27, the displacement of the tightening string 18 or the tension material 15 is reduced. It can be regulated by the first side wall 24 and the second side wall 25 which are the walls of the concave groove 19.

Furthermore, in the chair 1 according to this embodiment, the concave groove 19 is provided on the lower surface of the substrate 13 so as to be continuous in the circumferential direction of the substrate 13, and the first side wall 24 is configured by the inner wall of the concave groove 19. In addition, the second side wall 25 is constituted by the outer wall of the concave groove 19. Therefore, at the time of attaching the tension member 15, the peripheral portion of the tightening string 18 or the tension member 15 is continuously pushed into the concave groove 19 on the substrate 13 while the peripheral portion 15 a of the tension member 15 or the tension member 15 is pushed into the groove 19. 15 a can be easily arranged inside the first projecting wall 26 and the second projecting wall 27. For this reason, the tension member 15 can be easily attached. Further, since the displacement of the fastening string 18 and the peripheral edge portion 15a of the upholstery material 15 is restricted within the continuous concave groove 19, it is possible to make the upholstery material 15 more difficult to bend.
However, the continuous concave groove 19 is not necessarily formed on the lower surface of the substrate 13. As in the second embodiment shown in FIG. 8, the narrow first side wall 124 and second side wall 125 are intermittently projected on the lower surface of the substrate 113 along the direction in which the fastening string 18 extends. The first projecting wall 126 and the second projecting wall 127 may be provided in the vicinity of the projecting ends of the first side wall 124 and the second side wall 125, respectively.

Further, in the chair 1 according to this embodiment, the first projecting wall 26 and the second projecting wall 27 provided on the straight portion 13b are arranged adjacent to each other while being spaced apart from each other in the extending direction of the fastening string 18. ing. Therefore, the lengths of the first projecting wall 26 and the second projecting wall 27 can be sufficiently extended without causing contact between the tips of the first projecting wall 26 and the second projecting wall 27. For this reason, the first projecting wall 26 and the second projecting wall 27 can be easily bent and deformed when the fastening string 18 and the peripheral portion of the tension member 15 are attached. Therefore, this makes it easy to attach the tension member 15.

In particular, in the case of this embodiment, the first projecting wall 26 and the second projecting wall 27 provided adjacent to the straight line portion are the groove width of the concave groove 19 (the separation width between the first side wall 24 and the second side wall 25). Each tip extends to a position that is approximately half the length. Therefore, the wide range of the concave groove 19 is closed by the first protruding wall 26 and the second protruding wall 27, so that the peripheral portion 15a (clamping string 18) of the tension member 15 from the concave groove 19 is effectively removed. Can be prevented. In addition, as in this embodiment, even when the respective leading end portions of the first projecting wall 26 and the second projecting wall 27 are extended to a position that is approximately half the groove width of the recessed groove 19, tightening is performed at a minimum. If the string 18 is set so that it can pass through, the first projecting wall 26 and the second projecting wall 27 do not obstruct the operation of inserting the peripheral edge 15a of the tension member 15 into the concave groove 19.

FIG. 9 is a view showing the lower surface of the main part of the substrate 213 according to the third embodiment of the present invention.
In this embodiment, the front-end | tip part of the 1st protrusion wall 226 and the 2nd protrusion wall 227 which are provided in a linear part is arrange | positioned in the position which mutually opposes.
In the case of this embodiment, the front ends of the first protruding wall 226 and the second protruding wall 227 are arranged to face each other. Therefore, even if the displacement direction of the tightening cord 18 or the peripheral portion 15a of the tension member 15 may change, either the first projecting wall 226 or the second projecting wall 227 may be used. The displacement of the peripheral edge portion 15a of the material 15 can be reliably regulated.

FIG. 10 is a view showing the lower surface of the main part of the substrate 313 according to the fourth embodiment of the present invention.
In this embodiment, a part of the tip of the first projecting wall 326 and the second projecting wall 327 provided in the straight part is opposed to each other, and the remaining part is separated in the direction in which the fastening cord 18 extends. Are arranged.
In this embodiment, even if the displacement direction of the tightening cord 18 or the peripheral portion 15a of the tension member 15 may change, the tightening cord by either one of the first projecting wall 326 and the second projecting wall 327. 18 and the displacement of the peripheral portion 15a of the upholstery material 15 can be reliably regulated.
In addition, the first projecting wall 326 and the second projecting wall 327 are such that only a part of the tip part is opposed to each other, and the remaining part is separated in the direction in which the fastening string 18 extends. 326 and the 2nd protrusion wall 327 will extend long along the direction where the fastening string 18 is extended. For this reason, the first projecting wall 326 and the second projecting wall 327 can be easily bent and deformed when the fastening string 18 and the peripheral portion 15a of the tension member 15 are attached. For this reason, attachment of the upholstery material 15 can be facilitated.

The present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the scope of the invention. For example, although the above-described embodiment is an embodiment in which the load support is a seat, a similar structure can be adopted for the backrest body of the backrest.

According to the chair of the present invention, not only the displacement that tends to squeeze inside the peripheral edge of the tension member but also the displacement that spreads outward can be appropriately regulated, so that the displacement of the tension member can be more reliably suppressed. be able to.

1 chair 4 seat (load support)
13, 113, 213, 313 Substrate 14 Cushion material 15 Tension material 18 Tightening string 19

Ditch groove

24, 124

First side wall

25, 125

Second side wall

26, 126, 226, 326

First protruding wall

27, 127, 227 327 Second protruding wall

Claims

A substrate forming a skeleton, and
A cushioning material disposed on the surface side of the substrate;
A covering material covering at least the outer surface of the cushion material and the outer peripheral edge of the substrate;
A tightening element that is inserted into the peripheral edge of the tension member and is tightened on the back side of the substrate to bind the ends together while the tension material covers the outer peripheral surface of the cushion material and the outer peripheral edge of the substrate. In a chair provided with a load support having a string,
The substrate has a first locking means for restricting displacement of the tightened string in the center direction of the substrate, and a second for restricting displacement of the tightened string in the direction of the substrate outside. A chair provided with locking means.
The substrate is formed in a substantially rectangular shape having corners at four corners and straight portions between the corners,
The corner is provided with the first locking means,
The chair according to claim 1, wherein at least a part of the linear portion is provided with the second locking means.
The first locking means includes a first side wall projecting backward from the back surface of the substrate, and a first projecting wall projecting outward from the vicinity of the projecting end of the first side wall,
The second locking means includes a second side wall protruding backward from the back surface of the substrate, and a second protruding wall protruding inward of the substrate from the vicinity of the protruding end of the second side wall. The chair according to claim 1 or 2.
A concave groove continuous in the circumferential direction of the substrate is formed on the back surface of the substrate, the first side wall is constituted by an inner wall of the concave groove, and the second side wall is constituted by an outer wall of the concave groove. The chair according to claim 3, wherein the chair is configured.
4. The chair according to claim 3, wherein the first projecting wall and the second projecting wall are disposed adjacent to each other while being separated in a direction in which the fastening string extends.
The first projecting wall and the second projecting wall provided adjacent to each other have a length that is approximately half of the separation width of the first side wall and the second side wall in the direction intersecting with the extending direction of the fastening string. The chair according to claim 5, wherein each tip extends to a position.
The chair according to claim 3, wherein the first projecting wall and the second projecting wall are disposed at positions where their front ends face each other.
The first projecting wall and the second projecting wall are arranged such that a part of the tip part is opposed to each other and a part of the remaining part is spaced apart in the direction in which the fastening string extends. The listed chair.