JP2020058719A - Load support member and chair including the same - Google Patents

Abstract

To improve the designability by preventing a member for locking a face bar installed in an outer peripheral frame part from being visually recognized from a front face side of the outer peripheral frame part, and prevent the engagement between the outer peripheral frame part and the face bar from being erroneously released.SOLUTION: A chair seat includes an engagement recess 33 on an outer edge of an outer peripheral frame body part 31 in the substantially elliptical frame shape of the outer peripheral frame part. An engagement hole 37 having openings 37a on the front face side and the opposite rear face side of the outer peripheral frame part installed with a mesh-like face bar 17 is provided in the engagement recess 33. An outer peripheral edge of the face bar 17 is fixed with sewing or the like to a base part 40a of an edge member 40. An engagement protrusion 41 protruding from a locking piece is engaged with the engagement hole 37 by pushing the edge member 40 into the engagement recess 33 of the outer peripheral frame body part 31 for the engagement of the locking piece, and the face bar 17 is stretched over the outer peripheral frame part. The opening 37a of the engagement hole 37 is formed on the rear face side of the outer peripheral frame part, and a protrusion wall part 38 protruding to the rear face side is provided on the outer side of the opening for blocking.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a load supporting member that receives a load applied to a seat or a backrest of a chair and a chair including the load supporting member.

BACKGROUND ART Conventionally, as a chair provided with a load supporting member for receiving a load on a sheet-shaped face member stretched on a backrest of the chair, for example, one disclosed in Patent Document 1 below is known.
In the backrest of the chair described in Patent Document 1, a mesh-shaped upholstery member is installed as a face material on a back frame serving as an outer peripheral frame portion. Since this tension material is erected on the left and right side frame rods and the upper frame rod and the lower frame rod of the back frame forming a substantially rectangular shape with a predetermined tension, for example, the side edge members provided on the peripheral edge of the tension material are The side frame rod is locked by being press-fitted into a groove formed in the outer edge portion of the side frame rod to enhance the frictional resistance and prevent the side frame rod from falling off the back frame.
In addition, since the retaining force of the tension material with respect to the concave groove is weak only by pressing the edge material into the back frame, it is necessary to engage the protrusion formed on the side edge material with the through hole formed on the front side of the side frame rod. Therefore, the holding power is improved. The through hole of the side frame rod is formed on the surface side of the back frame, that is, on the surface covered with the tension material.

JP, 2013-94284, A

However, in the chair described in Patent Document 1, since the edge material of the tension material is sandwiched between the concave grooves formed in the left and right side frame rods of the back frame, the protruding pieces of the side edge material are engaged, It was necessary to attach side edge material to. Therefore, there is a problem that the number of members increases and the cost increases.
Moreover, since the side edge material is exposed to the front side of the back of the chair as a pressing member for the upholstery material, the appearance is not good and the edge material and the groove are accidentally engaged by the user's hand. There is a problem that may be canceled.

  The present invention has been made in view of such a problem, and in order to improve the designability, a member that locks the face material that is erected on the outer peripheral frame portion cannot be visually recognized from the surface side of the outer peripheral frame portion. An object of the present invention is to provide a load support member and a chair that can prevent the outer peripheral frame part and the face material from being disengaged by mistake.

A load support member according to the present invention includes an outer peripheral frame portion having an engagement recess opening to an outer edge portion, and an edge member engaged with the engagement recess at an outer peripheral edge portion, the edge member engaging the engagement recess. In a load supporting member comprising: a face material that is erected on the outer peripheral frame portion by being combined with each other, the outer peripheral frame portion has an inner surface opposite to the surface side of the outer peripheral frame portion on which the face material is erected inside the engagement recess. An engagement hole for locking an edge member having an opening on the back surface side, and a projecting wall portion projecting to the back surface side outside the opening of the engagement hole are provided.
According to the present invention, the edge member of the face material that receives the load is engaged with the engaging recess formed in the outer peripheral edge portion of the outer peripheral frame portion, and is engaged with the engaging hole communicating with the engaging recess from the inner wall thereof. Therefore, it is possible to prevent the engagement of the face material from being accidentally released by the user's hand or the like. Moreover, since the protruding wall portion is provided outside the opening of the engaging hole provided on the back surface of the outer peripheral frame portion, the opening cannot be visually recognized from the outside, and the appearance is good.

In addition, it is preferable that the edge member has an engaging convex portion that engages with the engaging hole inside the engaging concave portion.
When the edge member of the face material is inserted into the engaging recess, the engaging protrusion falls into the engaging hole and can be securely locked, so that the edge member and the engaging recess are engaged with each other due to a user's erroneous operation or the like. Can be prevented from being released.

Further, the outer peripheral frame part includes a support part installed on the back surface side of the face material and an outer peripheral frame body part connected to the support part and arranged on the outer peripheral side of the support part. It is preferable that a portion of the main body portion having the engagement hole protrudes to the outside of the support portion and is curved upward.
If the portion of the outer peripheral frame portion having the engagement hole in the outer peripheral frame body portion projects outside the support portion and is curved upward, the opening on the back surface side of the outer peripheral frame portion can be seen more easily from the outside, but the protruding wall It can be shielded by the part so that it cannot be seen.

Further, a plurality of engaging holes may be formed in the outer peripheral frame main body at predetermined intervals, and the protruding wall portion may be formed continuously along the openings of the plurality of engaging holes.
Along the openings of the plurality of engaging holes on the back surface of the outer peripheral frame main body, the protruding wall portions are continuously formed on the outer side thereof, so that the strength of the outer peripheral frame main body can be further reinforced and the appearance is excellent. The design is often improved.

A chair according to the present invention is characterized by including the load supporting member described in any one of the above, and a support structure supporting the load supporting member.
In the chair according to the present invention, the edge member of the face material that receives the load is engaged with the engagement recess of the outer peripheral frame portion and locked in the engagement hole, so that the engagement of the face material is released due to a user's erroneous operation or the like. Can be prevented. Moreover, the opening of the engagement hole provided on the back surface of the outer peripheral frame portion cannot be visually recognized from the outside due to the protruding wall portion, and thus the designability is high.

According to the load supporting member and the chair of the present invention, the opening of the locking hole provided inside the engaging recess that engages the edge member of the face member is shielded by the protruding wall portion on the rear surface side of the outer peripheral frame portion. Since the opening of the locking hole cannot be seen from the outside, the appearance is good and the design is improved.
In addition, since the edge member is engaged with the engaging recess and the locking hole therein, the surface of the surface member is prevented from being accidentally released by the user or the like by the user. The holding power of the material is improved.

1 is a front view of a chair according to an embodiment of the present invention. FIG. 2 is a side view of the chair shown in FIG. It is a rear view of the chair shown in FIG. FIG. 3 is a perspective view of a seat portion of the chair according to the embodiment. FIG. 5 is a plan view of an outer peripheral frame portion of the seat shown in FIG. 4. 6A and 6B show the outer peripheral frame portion shown in FIG. 5, where FIG. 5A is a perspective view of the front surface side, and FIG. It is a principal part perspective view which looked at the outer side frame part of an outer peripheral frame part from the back surface side. 7A is a cross-sectional view taken along the line AA of the outer frame portion shown in FIG. 7, and FIG. 8B is a cross-sectional view of the rear frame portion. It is a principal part perspective view of the edge member of face material. FIG. 8 is a cross-sectional view of main parts in a state where an edge member of a face material is engaged with an engagement recess shown by a cross section taken along line CC of the outer frame portion illustrated in FIG. It is a principal part sectional view in the state where the edge member of the face material was engaged with the engagement recess and the engagement hole of the outer peripheral frame.

A chair 1 and its seat 8 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
1 to 3 are schematic views showing a chair 1 according to an embodiment of the present invention. The chair 1 is provided with a leg 4 having five radial rods 3 provided with casters 2 at the tip and a standing body at the center of the leg 4, and a gas spring (not shown) is housed inside. Telescopic pedestal 5, fulcrum 6 having a rear end fixed to the upper end of pedestal 5, facing forward and upward, seat 8 supported above fulcrum 6, and front end in the left-right direction, that is, The chair 1 includes a backrest support frame 9 pivotally attached to the support base 6 with a shaft 9a facing the width direction of the chair 1 and having an L-shape in a side view, and a backrest 10 supported on an upper rear portion of the backrest support frame 9. . Further, the backrest support frame 9 is connected to the armrests 12 located on both sides of the seat 8.

  The support base 6 has, for example, a box shape that is long in the front-rear direction with an upper surface opened and is substantially rectangular in a plan view. A compression coil spring as described in Japanese Patent Publication No. 2005-212144 and an adjusting means (all not shown) for adjusting the biasing force of the spring are housed. The opening on the upper surface of the support base 6 is covered with a removable cover 13.

The seat 8 includes a support frame 15 having a frame shape in a plan view, an outer peripheral frame portion 16 made of synthetic resin attached to an upper portion of the support frame 15, and an outer peripheral frame so as to cover an upper surface and an outer peripheral surface of the outer peripheral frame portion 16. For example, a face sheet 17 in the form of a mesh sheet attached to the portion 16 is provided. The face material 17 is omitted in FIG.
As shown in FIGS. 1 and 2, the support frame 15 has a pair of front and rear horizontal rods 15a and 15b, which are inclined in an outwardly upward direction on both sides and face downward in a horizontal direction, and front and rear of the horizontal rods 15a and 15b. A pair of left and right vertical rods 15c and 15d that connect the ends to each other are provided.

  The vertical rods 15c and 15d are rotatably connected to an upper surface of a portion of the backrest support frame 9 rearward of the shaft 9a. The backrest support frame 9 is formed so as to be vertically rotatable about the shaft 9a. The backrest support frame 9 has a pair of left and right backrest support rods 19, 19 each having a front end attached to both sides of the shaft 9a and formed in a substantially L shape, and a rear end portion of the backrest support rods 19, 19 which are upright. And a fixing piece 20 provided on the.

Due to the connection between the horizontal rod 15b at the rear of the support frame 15 and the backrest support frame 9, when the backrest 10 tilts backward together with the backrest support frame 9, the rear part of the seat 8 is moved rearward. Along with this, the front horizontal rod 15a is slid rearward against the biasing force of the compression coil spring in the support base 6, and the front portion of the seat 8 is also moved rearward.
The forward turning force of the backrest 10 and the forward returning force of the seat 8 are obtained by the biasing force of the compression coil spring in the support base 6. Alternatively, a separate gas spring may be provided and the restoring force may be obtained by the urging force thereof. The backrest 10 attached to the backrest support frame 9 is always biased forward.

The backrest 10 includes a back frame 22 made of hard synthetic resin, which is a frame body having a substantially rectangular front shape, and a mesh sheet-like tension member 23 stretched on the surface, that is, the front surface of the back frame 22. The upholstery material 23 is included in the face material.
The back frame 22 includes a pair of left and right side frame rods 24 and 24 that are bent in a dogleg shape so that a portion slightly below the center in the vertical direction protrudes forward in a side view, and the upper end portions thereof. An upper frame rod 25 that is connected and is curved in an arc shape so that the center portion in the left-right direction projects rearward, and a lower frame rod 26 that connects the lower end portions of both side frame rods 24, 24 in a substantially linear manner. I have it. On the lower surface of the lower frame rod 26, a rear upper portion of the backrest support frame 9 is formed over substantially the entire length in the left-right direction. The lower front end of the lower frame rod 26 is connected to the backrest support frame 9.

Next, the configuration of the seat 8 will be described with reference to FIGS. 4 to 11.
As shown in FIG. 4, the seat 8 is provided with an outer peripheral frame portion 16 made of, for example, a synthetic resin, and a face material 17 in a mesh sheet shape attached to cover the upper surface and the outer peripheral surface of the outer peripheral frame portion 16, for example. There is. As shown in FIGS. 5 and 6, the outer peripheral frame portion 16 is formed with a pair of supporting portions 30 parallel to each other, and a substantially elliptical frame formed so as to surround the outer peripheral portion of the supporting portion 30 and connected to the supporting portion 30. The outer peripheral frame main body portion 31 has a shape.
The support portions 30 are arranged in the front-rear direction of the seat 8. The support frame 15 provided at the lower part of the pair of support portions 30 is supported by the support base 6 via the front side horizontal rod 15a, and the backrest support frame 9 is provided with the left and right vertical rods 15c, 15d. Is supported through. The backrest support frame 9 and the support base 6 form a support structure of the chair 1.

  Moreover, in FIG. 5 and FIGS. 6A and 6B, the outer peripheral frame main body 31 has outer frame portions 31a and 31a at portions projecting to both outer sides of the pair of support portions 30 and 30, respectively. Is curved upward and is formed in a substantially arc shape. The outer frame portions 31a, 31a are overhung outward from the support portions 30, 30. In the substantially linear region sandwiched by the support portions 30, 30 of the outer peripheral frame body 31, the front side of the chair 1 is a front frame portion 31b, and the rear side, that is, the backrest 10 side is a rear frame portion 31c. The region sandwiched by the pair of supporting portions 30, 30 and the front frame portion 31b and the rear frame portion 31c is formed in a substantially planar shape and a substantially square shape.

  6 to 8, in the outer edge portion of the outer peripheral frame body portion 31, in the regions of the outer frame portions 31a, 31a and the front frame portion 31b on both sides except the rear frame portion 31c, for example, a substantially U-shaped cross section or A substantially U-shaped engaging recess 33 is continuously formed. The engagement recess 33 engages with the edge member 40 fixed to the outer edge of the face material 17, as described later. As shown in FIG. 6B, a step portion 34 having a substantially L-shaped cross section is formed on the upper side of the rear frame portion 31c.

As shown in FIG. 8B, a recess forming member 32 having a substantially L-shaped cross section having an upward protruding portion 32a facing the step portion 34 is provided below the step portion 34 of the rear frame portion 31c. Has been done. A recess 35 having a substantially U-shaped cross section is formed between the step portion 34 of the rear frame portion 31c and the protrusion 32a of the recess forming member 32. The recess 35 constitutes a part of the engagement recess 33. Therefore, the engaging recessed portion 33 is formed on the outer peripheral edge portion of the outer peripheral frame body portion 31 over the entire circumference. Further, the base portion 32b of the recess forming member 32 and the descending portion 34b of the step portion 34 are in contact with each other and are fixed to each other by a fixing means such as a bolt.
Moreover, since the step portion 34 of the rear side frame portion 31c and the recess forming member 32 have a relatively large rigidity by fixing with bolts or the like, when the edge member 40 of the face material 17 is engaged with the engaging recess 33, the outer peripheral frame body. The outer frame portion 31a and the front frame portion 31b of the portion 31 are easily elastically deformed, and the engagement work of the edge member 40 with the engagement recess 33 of the outer frame portion 31a and the front frame portion 31b is facilitated.

  In the outer peripheral frame body 31, as shown in FIG. 8A, the outer frame 31a penetrates from the position in the vicinity of the innermost part in the engaging recess 33 toward the back surface side (the lower surface side of the chair 1). A fitting hole 37 is formed, and an opening 37a of the engagement hole 37 is provided on the back surface side. Since the outer peripheral frame portion 16 made of synthetic resin is manufactured by molding with a mold, the engaging recessed portion 33 is formed with a draft taper, and the diameter gradually increases from the innermost portion toward the opening side. In the cross-sectional view of the engaging recessed portion 33 shown in FIG. 8A, the lower surface 33b is formed on the upper surface 33a so as to be an inclined surface of an uphill approaching the upper surface 33a from the opening toward the innermost portion.

Further, also in the engagement hole 37, a draft taper is formed so that the diameter gradually increases from the communicating portion in the vicinity of the innermost portion in the engagement recess 33 toward the opening 37a. Note that the cross-sectional shapes of the engagement recess 33 and the engagement hole 37 and the positions of communication with each other can be appropriately set without being limited to the above-described configuration.
As shown in FIG. 7, a plurality of engaging holes 37 formed in the engaging recess 33 on the back surface side are formed at predetermined intervals in the longitudinal direction of the outer frame portions 31a, 31a on both sides, for example, three holes each. However, it is not formed on the front frame portion 31b and the rear frame portion 31c. The number of the engaging holes 37 installed is not limited to three, and an appropriate number can be formed. Further, on the back surface side of the outer frame portion 31a, a projecting wall portion 38 projecting to the back surface side is formed on the outer peripheral side of the opening 37a of the engagement hole 37. Although the projecting wall portion 38 is formed to have a substantially mountain-shaped cross section, the projecting wall portion 38 may have any projecting shape.

In the present embodiment, since the outer peripheral frame portion 16 is curved upward in the area of the outer frame portion 31a, the opening 37a of the engagement hole 37 formed on the back surface is easily visible from the outside of the chair 1. By forming the projecting wall portion 38 on the outer peripheral side of the opening 37a, the opening 37a can be covered and is less visible. Moreover, since the protruding wall portion 38 is integrally formed with the outer frame portion 31a, the rib becomes a rib, and the strength of the outer frame portion 31a can be improved.
In the example shown in FIG. 7, the protruding wall portion 38 is continuously formed in a substantially arc shape along the longitudinal direction of the outer frame portion 31a, but is provided at least in a region that covers the opening 37a of the engagement hole 37. If formed, it may be formed intermittently.

The seat 8 is formed by engaging the rim member 40 fixed to the outer peripheral edge portion 17a of the face material 17 with the engaging recess 33 formed in the outer peripheral frame body portion 31 of the outer peripheral frame portion 16 over the entire circumference. (See FIGS. 10 and 11). An edge member 40 made of, for example, a synthetic resin as shown in FIG. 9 is fixed to the outer peripheral edge portion 17a of the face member 17 attached to the outer peripheral frame portion 16.
In FIG. 9, the edge member 40 is, for example, formed into a substantially L-shaped cross section by a plate-shaped base portion 40a and a locking piece 40b bent at one end thereof, and has the shape of the engagement recess 33 of the outer peripheral frame body portion 31. It is formed in a substantially ring shape. The engaging piece 40b is provided with an engaging convex portion 41 projecting from the engaging piece 40b in a part of the circumferential direction thereof. The engagement convex portion 41 is a claw portion that engages with the engagement hole 37 formed in the engagement concave portion 33, and is formed so as to protrude to the back surface side with respect to the locking piece 40b. Therefore, the engaging protrusions 41 of the edge member 40 are arranged at the same intervals in the region of the three engaging holes 37 formed in the engaging recess 33 of the outer frame portion 31a.

  An outer peripheral edge portion 17a of the face member 17 is placed on the surface of the base portion 40a on the side of the locking piece 40b, for example, and the outer peripheral edge portion 17a is attached to the base portion 40a over the entire circumference by a sewing machine or the like. The fixing means of the outer peripheral edge portion 17a of the face material 17 to the base portion 40a may be performed by welding, adhesion or the like other than the adhesion. Alternatively, the outer peripheral edge portion 17a of the face material 17 may be installed at a predetermined position in the mold for molding the edge member 40, and the edge member 40 and the outer peripheral edge portion 17a of the face material 17 may be integrally molded. In this case, since the outer peripheral edge portion 17a has a mesh shape, the resin flows into the mesh of the mesh, is solidified, is embedded in the base portion 40a, and can be integrated with high strength.

  The edge member 40 is one in which the locking piece 40b is inserted into the engaging recess 33 of the outer peripheral frame body 31 with respect to the base 40a, and the height of the locking piece 40b is the engaging recess 33. It is formed slightly larger than the height of the innermost part. Therefore, as shown in FIG. 10, the locking piece 40b is compressed and deformed by the upper surface 33a and the lower surface 33b of the engaging recess 33 at a position pushed into the innermost part of the engaging recess 33 or in the vicinity thereof. Be stopped. In this state, the face material 17 is bent to the surface (upper surface) side of the outer peripheral frame portion 16 and is installed with a predetermined tension.

  When a person is seated on the seat 8, a strong tension is applied to the face material 17 made of a mesh sheet, and moreover, it is easily elastically deformed. In particular, strong tension is applied to the outer frame portions 31a, 31a on both sides that are overhung from the support portion 30 of the outer peripheral frame body portion 31. Therefore, as shown in FIG. 11, in a region where the engagement hole 37 is formed in the engagement recess 33 of the outer frame portion 31a, the locking member 40b is pushed to the maximum by pushing the edge member 40 into the engagement recess 33. When it is pushed into the inner part, the engaging projection 41 falls into the engaging hole 37 and can be locked more firmly. As a result, the holding strength of the edge member 40 by the outer peripheral frame portion 16 can be increased.

The face member 17 has not only the seat 8 but also the backrest 10 to which the tension member 23 as a face member is attached. The attachment structure of the upholstery member 23 of the backrest 10 will be described by omitting the illustration, and using the same names and reference numerals for substantially the same members as the attachment structure of the face member 17 in the seat 8.
That is, the surface material 17 is provided in the engaging recesses 33 formed at the outer edge portions of the left and right side frame rods 24, 24, the upper frame rod 25, and the lower frame rod 26, which form the back frame 22 having a substantially rectangular frame shape of the backrest 10. A mesh sheet-shaped upholstery material 23 made of the same material as the above is stretched. An edge member 40 is fixed to an outer edge portion of the upholstery material 23, and the edge member 40 is engaged with an engagement recess 33 of the back frame 22.

Further, the side frame rods 24, 24 on both sides of the back frame 22 are formed with engagement holes 37 communicating with the engagement recesses 33. The engagement holes 37 are opened not on the back surface of the backrest 10 but on the front surface thereof. 37a is formed. The engaging projection 41 of the edge member 40 is engaged with the engaging hole 37 formed in the engaging recess 33 of the side frame rods 24, 24 on both sides.
In the backrest 10, if the opening 37a of the engaging hole 37 is open to the back surface of the side frame rods 24, 24, it is not preferable because the protruding wall portion 38 is easily visible even if it is formed in the vicinity thereof. On the other hand, even if the opening 37a of the engaging hole 37 is opened on the front surface of the side frame rods 24, 24, it is not conspicuous because it is covered with the upholstery material 23, so it is relatively hard to see from the outside.

As described above, according to the seat 8 of the chair 1 according to the present embodiment, the engagement protrusion 41 of the edge member 40 is engaged in the engagement recess 33 formed in the outer frame portion 31a of the outer peripheral frame portion 16. The engagement hole 37 was formed and the opening 37a was formed in the back surface side. Moreover, since the protruding wall portion 38 is formed outside the opening 37a, the opening 37a can be shielded from the outside. Therefore, the opening 37a of the engagement hole 37 is hard to be visually recognized from the outside, and the design of the appearance is improved. Moreover, even if the user's hand accidentally touches it, it is possible to prevent the engagement recess 33 of the outer peripheral frame body 31 and the edge member 40 of the face member 17 from being disengaged.
Further, since the engagement hole 37 is formed on the rear surface side from the vicinity of the innermost portion of the engagement recess 33 formed on the outer peripheral edge of the outer peripheral frame body 31, the engagement piece 40b of the edge member 40 is engaged. The engagement protrusion 41 can be easily engaged in the engagement hole 37 by pushing the engagement protrusion 41 toward the innermost portion of the recess 33. Therefore, the face material 17 can be easily attached and fixed to the outer peripheral frame portion 16, and moreover, since the engaging convex portion 41 is engaged with the engaging hole 37 by dropping, the tension and elastic deformation of the face material 17 are largely changed. The detachment of the member 40 can be prevented.

  The outer peripheral frame portion 16 includes a support portion 30 installed on the support structure side of the chair 1 and an outer peripheral frame body portion 31 arranged in the outer peripheral direction of the support portion 30, and outer frame portions on both sides of the outer peripheral frame body portion 31. The portion 31a overhangs from the support portion 30 obliquely upward. Therefore, when the protruding wall portion 38 and the engagement hole 37 are resin-molded by the mold, the molding is easy without interfering with the mold forming the support portion 30 at the time of releasing the mold. Further, since the outer frame portions 31a on both sides are overhung, the outer peripheral frame body portion 31 is easily elastically deformed, but since the thick protruding wall portion 38 functions as a rib, there is a reinforcing effect and high strength. is there.

In the seat 8, when the edge member 40 of the face material 17 is pushed into the engaging recess 33 of the outer peripheral frame 16, the portion of the locking piece 40b of the edge member 40 formed in a substantially L-shaped cross section is engaged with the engaging recess 33. Since it is compressed and deformed by the upper surface 33a and the lower surface 33b, resistance against disengagement from the engagement recess 33 can be secured.
Moreover, since the engagement concave portion 33 is formed in a taper shape so that the height between the upper surface 33a and the lower surface 33b gradually decreases from the opening side toward the innermost portion, the engaging piece 40b and the height higher than this are formed. The engaging protrusions 41 having a large diameter are gradually elastically deformed and compressed, and can be securely engaged.

  Further, when the face material 17 is engaged with the outer peripheral frame body portion 31 of the outer peripheral frame portion 16, the mesh sheet-shaped face material 17 is strongly pulled to engage the edge member 40 with the engagement concave portion 33 of the outer peripheral frame body portion 31. Need to let. At this time, since the stepped portion 34 of the rear frame portion 31c forms the engaging recess 33 with the protrusion 32a of the recess forming member 32 that is a separate member, the outer frame portion 31a of the outer peripheral frame body portion 31 is formed. Therefore, the strength of the front frame portion 31b is relatively small and the elastic deformation easily occurs. Therefore, by deforming the outer frame portion 31a and the front frame portion 31b, it is possible to reduce the load on the face material 17 and the edge member 40 and easily engage the edge member 40 in the engagement recess 33.

  It should be noted that the present invention is not limited to the chair 1 according to the above-described embodiment, and appropriate changes and substitutions can be made without departing from the gist of the present invention, all of which are included in the present invention. Modifications and the like of the present invention will be described below, but the same or similar parts or members as those of the above-described embodiment will be described using the same reference numerals.

In the above-described embodiment, the edge member 40 of the face material 17 is engaged with the engaging recess 40b of the outer peripheral frame body 31 of the outer peripheral frame 16 by the locking piece 40b, and the engaging convex portion 41 is engaged with the engaging hole. It is made to fall into 37 and engaged. In this case, when the height of the engagement protrusion 41 in the back surface direction increases, the engagement strength with the engagement hole 37 increases, but the pushing resistance into the engagement recess 33 increases.
Therefore, the protrusion amount of the engagement protrusion 41 with respect to the locking piece 40b is suppressed small, and the edge member 40 is firmly engaged by driving a bolt, a pin or the like into the engagement protrusion 41 from the opening 37a side of the engagement hole 37. You may At that time, the engaging convex portion 41 may be penetrated by a bolt or the like and screwed or fixed to the upper surface 33a of the engaging concave portion 33.
Alternatively, the edge member 40 may be pushed into the engagement concave portion 33 for engagement without providing the engagement convex portion 41, and a bolt, a pin, or the like may be driven into the engagement piece 40b from the engagement hole 37 as the engagement convex portion. The engagement strength may be increased by abutting the engagement hole 37.

Although the protruding wall portion 38 for concealing the engaging hole 37 communicating with the engaging recess 33 of the outer peripheral frame portion 16 is formed to have a substantially mountain-shaped cross section, it may have any shape as long as it can shield the opening 37a from the outside. For example, the outer side of the opening 37a on the back surface of the outer peripheral frame main body 31 may be formed thicker than the inner side.
Further, an engaging hole 37 is formed in the engaging concave portion 33 in the front frame portion 31b of the outer peripheral frame body portion 31 of the outer peripheral frame portion 16, and the engaging convex portion 41 that engages with the engaging hole 37 is formed in the engaging piece of the edge member 40. You may form in 40b.

In addition, although the outer frame portion 31a of the outer peripheral frame portion 16 is curved upward to make it overhang, it may not be curved, and may be formed in a flat plate shape together with the support portion 30, for example. Even in this case, the opening 37a of the engagement hole 37 can be blocked by the protruding wall portion 38.
The face material 17 provided on the seat 8 is not limited to the mesh sheet, and may be a sheet shape such as cloth or leather.
Further, in the above-described embodiment, the side frame rods 24, 24 on both sides of the back frame 22 are formed with the engagement holes 37 communicating with the engagement recesses 33, and the openings 37 a of the engagement holes 37 are formed in the backrest 10. Although it is formed on the front surface, the engagement hole 37 and the opening 37a may be formed on the back surface instead of this. Then, in the side frame rods 24, 24 on both sides of the back frame 22, the protruding wall portion 38 may be formed outside the opening 37a on the back surface. Even in this case, since the opening 37a cannot be seen from the outside of the backrest 10, the design of the appearance is improved, and the provision of the protruding wall portion 38 has an advantage that the strength of the backrest 10 is improved.

Further, in the above-described embodiment, the outer peripheral frame portion 16 and the face material 17 of the seat 8 have been described as the load supporting member for the chair 1, but the present invention is not limited to the seat 8 and is as described above. It is also applicable to the back frame 22 and the upholstery material 23 of the backrest 10. Further, the load supporting member of the present invention can be applied to a headrest or the like that can be installed on the chair 1.
The load support member of the present invention can be applied to other than the chair 1, for example, a net rack of a vehicle or an insect net.

DESCRIPTION OF SYMBOLS 1 chair 8 seat 9 backrest support frame 10 backrest 16 outer peripheral frame part 17 face material 23 tension material 30 support part 31 outer peripheral frame body part 31a outer frame part 31b front frame part 31c rear frame part 32 recess forming member 33 engagement recess 34 Step portion 37 Engagement hole 37a Opening 38 Projecting wall portion 40 Edge member 40a Base portion 40b Locking piece 41 Engaging convex portion

Claims (5)

An outer peripheral frame portion having an engaging recess opening to the outer edge portion,
A load provided with an edge member engaged with the engagement recess at an outer peripheral edge portion thereof, and a face member erected on the outer peripheral frame portion when the edge member is engaged with the engagement recess. In the support member,
The outer peripheral frame portion is
An engagement hole communicating with the inside of the engagement recess and for locking the edge member having an opening on the back surface side opposite to the front surface side of the outer peripheral frame portion on which the face material is installed,
A projecting wall portion projecting to the back side outside the opening of the engaging hole,
A load supporting member comprising:   The load support member according to claim 1, wherein the edge member has an engagement protrusion that engages with the engagement hole inside the engagement recess. The outer peripheral frame portion includes a support portion installed on the back surface side of the face material, and an outer peripheral frame main body portion connected to the support portion and arranged on the outer peripheral side of the support portion,
The load support member according to claim 1 or 2, wherein a portion of the outer peripheral frame main body portion having the engagement hole projects outward from the support portion and is curved upward.   The plurality of engaging holes are formed at a predetermined interval in the outer peripheral frame body, and the protruding wall portion is continuously formed along the openings of the plurality of engaging holes. Load support member.   A chair comprising: the load support member according to any one of claims 1 to 4; and a support structure that supports the load support member.

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