JP6440310B2 - Plate member connection structure, chair load support structure, and chair - Google Patents

Description

  The present invention relates to a plate member connection structure, a chair load support structure, and a chair.

As a plate member connection structure related to the above technical field, for example, a cushion seat plate mounting structure of a chair described in Patent Document 1 below is known.
The cushion cushion mounting structure of the chair described in Patent Document 1 is provided with a plurality of hooks protruding in a side-by-side manner near the front edge of the upper surface of the horizontal plate portion of the chair body, and with the horizontal projection. Several mounting holes are opened from the center of the plate portion toward the rear, and an engagement hole is formed near the front edge of the seat plate formed by stretching a cushion material on the upper surface. A dowel made of hard elastic plastic having an expandable tip portion that can be detachably fitted into the mounting hole is provided on the lower surface of the plate.

  In the cushion seat plate mounting structure of the chair, the horizontal plate portion and the seat plate are interconnected by first moving the seat plate in the first direction along the plate surface of the horizontal plate portion, thereby leading the front edge of the horizontal plate portion. The engaging hole of the seat plate is engaged with the hook provided on the side. Next, with the connecting portion between the hook and the engagement hole as a pivot point, the rear of the seat plate is moved relative to the second direction intersecting the plate surface of the horizontal plate portion, and the dowel of the seat plate is attached to the horizontal plate portion. Engage with the hole. Such a connection structure is excellent in that it is difficult to release one engagement state by the other engagement because the engagement directions of the respective connection portions are different.

Japanese Utility Model Publication No. 7-33148

  In recent years, there has been a demand for a chair that gives a soft feel to a seated person by flexibly deforming in the direction of receiving a load. However, in the cushion seat plate mounting structure of the chair described in Patent Document 1, the seat plate is elastically deformed between the hook provided near the front edge of the horizontal plate portion and the engagement hole of the seat plate. There are no gaps to allow. Here, when the clearance is increased and the seat plate can be elastically deformed, when the seat plate is elastically deformed into a concave shape, the hook and the engagement hole are easily separated in the first direction, and the hook is engaged. There exists a problem that the engagement state with a hole will be cancelled | released.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a plate member connection structure, a chair load support structure, and a chair that can prevent the engagement state from being released while allowing elastic deformation. To do.

The plate member connection structure according to the present invention employs the following configuration in order to solve the above-described problems.
The plate member connection structure according to the present invention is a plate member connection structure for connecting the first plate member and the second plate member by relative movement in the first direction along the plate surface, the first plate member and The engagement portion provided on one side of the second plate member and the engagement portion provided on the other side of the first plate member and the second plate member with a gap in a second direction intersecting the plate surface. An engaged portion that accommodates a portion, and when the one is elastically deformed in a concave shape in the second direction, the engaged portion is in contact with the engaging portion in the first direction. It has a contact part.
According to this configuration, since the engaging portion is accommodated in the engaged portion with a gap in the second direction intersecting the plate surface, the elasticity of the first plate member and the second plate member in the second direction is accommodated. Deformation can be allowed. Also, a contact portion is provided in the engaged portion, and when the plate member receiving the load is elastically deformed in a concave shape in the second direction, the contact portion is brought into contact with the engagement portion in the first direction along the plate surface to The portion and the engaged portion are prevented from separating in the first direction. Thereby, it is possible to prevent the engagement state from being released while allowing elastic deformation.

Further, in the plate member connection structure according to the present invention, the engagement portion has a hook portion that contacts the contact portion disposed on a locus that is displaced when the one is elastically deformed. It is a feature.
According to this configuration, the hook portion is provided in the engagement portion, and the plate member that receives the load is brought into contact with the contact portion on a locus that is displaced when the plate member is elastically deformed in a concave shape in the second direction. Displacement can be regulated. Further, the engagement state can be reliably prevented from being released by mechanically hooking the contact portion by the hook portion.

Further, in the plate member connection structure according to the present invention, the engaged portion communicates with the opening portion into which the engaging portion is inserted by the relative movement in the first direction, and the second portion. And an accommodating portion larger than the opening in the direction.
According to this configuration, since the accommodating portion is larger in the second direction than the opening in the engaged portion, the engaging portion is easily displaced in the second direction in the accommodating portion. When the engaging portion is greatly displaced in the second direction in the accommodating portion, it is difficult to come out from the opening portion, so that the engagement state can be more reliably prevented.

In the plate member connection structure according to the present invention, the engaging portion has a base end portion connected to the one side, and the engaged portion faces the abutting portion in the second direction. And a distal end portion of the ceiling portion is located closer to the base end portion than the contact portion in the first direction.
According to this configuration, when the base end portion of the engagement portion is displaced in the second direction away from the contact portion, the engagement portion comes into contact with the ceiling portion facing the contact portion. In addition, since the distal end of the ceiling portion is located closer to the proximal end than the contact portion in the first direction, a moment load is applied from the distal end to the engaging portion, and the distal end of the engaging portion is moved. It can be made easy to be close to the contact portion.

Further, in the plate member connection structure according to the present invention, the engaging portion has a base end connected to the one, and the one is an edge of the plate surface outside the base end. And a bent portion that bends in the first direction after being bent in at least the second direction.
According to this configuration, the bent portion is provided outside the base end portion of the engaging portion, and the rigidity of the edge portion of the plate surface is increased. This makes it difficult for elastic deformation at the edge of the plate surface, and since elastic deformation starts from the inside of the bent portion, a moment load is applied to the engaging portion having the base end portion inside the bent portion. The tip of the engaging part can be easily brought close to the contact part.

Moreover, the load support structure for a chair according to the present invention includes a plate-shaped outer shell member, a plate-shaped inner shell member supported by the outer shell member, and an exterior member supported by the inner shell member. A load supporting structure for a chair provided, wherein the plate member connecting structure for connecting the outer shell member and the inner shell member has the plate member connecting structure described above.
According to this configuration, it is possible to obtain a load support structure for a chair that can prevent the inner shell member and the outer shell member from being released from being engaged while allowing elastic deformation of the inner shell member.

Moreover, the chair which concerns on this invention has a seat provided with the load support structure of the chair as described above, and at least one of a backrest, It is characterized by the above-mentioned.
According to this configuration, it is possible to obtain a chair that can prevent the engagement state from being released while allowing elastic deformation and can give a soft feel to the seated person.

  According to the present invention, it is possible to obtain a plate member connection structure, a chair load support structure, and a chair that can prevent the engagement state from being released while allowing elastic deformation.

It is a perspective view of the chair 1 in embodiment of this invention. It is a principal part disassembled perspective view of the chair 1 in embodiment of this invention. It is a top view of load supporting structure 10 in an embodiment of the present invention. It is a perspective view of the outer shell member 20 in the embodiment of the present invention. It is a perspective view of the inner shell member 30 in the embodiment of the present invention. It is a bottom side perspective view of inner shell member 30 in an embodiment of the present invention. It is arrow AA sectional drawing in FIG. It is arrow BB sectional drawing in FIG. It is CC sectional view taken on the line in FIG. It is arrow DD sectional drawing in FIG. It is arrow EE sectional drawing in FIG. It is a conceptual diagram for demonstrating the elastic deformation of the load support structure 10 in embodiment of this invention, and the effect | action in the 1st connection part 101. FIG.

  Embodiments of the present invention will be described below 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 may be referred to as “front”, and the opposite direction may be 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 in a normal posture is sometimes referred to as “left”, and the direction opposite to that is referred to as “right”.

FIG. 1 is a perspective view of a chair 1 according to an embodiment of the present invention.
As shown in FIG. 1, the chair 1 of this embodiment includes a leg portion 2, a support base 3, a seat 4, a backrest 5, and an armrest 6.

  The leg 2 includes a multi-limb leg 2a having casters 2a1 and a pedestal 2b that stands up from the center of the multi-limb leg 2a. The pedestal 2b incorporates a gas spring so that the rod 2b1 can be raised and lowered. Such a leg 2 enables the chair 1 to move on the floor surface by bringing the caster 2a1 into contact with the floor, and supports the seat 4, the backrest 5 and the like by the leg pillar 2b so as to be movable up and down. Note that the rod 2b1 of the pedestal 2b can be expanded and contracted by operating an operation unit (not shown), and the seat 4, the backrest 5 and the like can be moved up and down.

  The support base 3 is fixed to the upper end of the rod 2b1 of the pedestal 2b, supports the seat 4, and supports the backrest 5. The seat 4 is a portion that supports a seated person who is a user of the chair 1 from below, and is supported by the support base 3 from below. The backrest 5 is a part that supports the seated person from the rear, and is connected to the support base 3 so as to be tiltable. The armrest 6 is a part that supports the arm of the seated person from below, and two armrests 6 are fixed to the backrest 5 so as to sandwich the seat 4 from the left-right direction.

  In the chair 1 of the present embodiment, the support base 3 includes a base portion 3a and a torsion unit 3b. The base portion 3a is a strength member that is fixed to the tip of the rod 2b1 of the pedestal 2b, and has two arms 3a1 that extend forward and have the seat 4 fixed to the tip. The torsion unit 3b is connected to the backrest 5 so that the backrest 5 can be locked.

FIG. 2 is an exploded perspective view of a main part of the chair 1 according to the embodiment of the present invention.
As shown in FIG. 2, the seat 4 of the present embodiment includes a load support for a chair having an outer shell member 20 (first plate member), an inner shell member 30 (second plate member), and an exterior member 40. A structure 10 (hereinafter simply referred to as a load support structure 10) is provided.

  The outer shell member 20 is a resin-made plate-like member close to the support base 3 and forms a lower layer of the seat 4. The inner shell member 30 is a resin plate-like member supported by the outer shell member 20 and forms the upper layer of the seat 4. The exterior member 40 includes a cushion material such as urethane supported by the inner shell member 30 and a sheet skin material that is stretched over the inner shell member 30 and covers the upper side of the cushion material.

  Comparing the outer shell member 20 and the inner shell member 30, the outer shell member 20 has higher rigidity than the inner shell member 30. The inner shell member 30 has a plate surface 30a that is curved so that the central portion is convex downward, and is configured to be easily elastically deformed. The outer shell member 20 has a plate surface 20a in which an opening 20b is formed in a recessed portion (sitting position) of the inner shell member 30, and is configured to facilitate elastic deformation of the inner shell member 30. The opening 20b has a substantially rectangular shape extending in the left-right direction. The load support structure 10 includes a connection structure 100 described below.

  FIG. 3 is a plan view of the load support structure 10 according to the embodiment of the present invention. FIG. 4 is a perspective view of the outer shell member 20 in the embodiment of the present invention. FIG. 5 is a perspective view of the inner shell member 30 in the embodiment of the present invention. FIG. 6 is a bottom perspective view of the inner shell member 30 in the embodiment of the present invention. 7 is a cross-sectional view taken along the line AA in FIG. 8 is a cross-sectional view taken along the line BB in FIG. 9 is a cross-sectional view taken along the line CC in FIG. 10 is a cross-sectional view taken along the line DD in FIG. 11 is a cross-sectional view taken along line EE in FIG.

As shown in FIG. 3, the load support structure 10 of the present embodiment has a connection structure 100 that connects the outer shell member 20 and the inner shell member 30 with their plate surfaces aligned.
The connection structure 100 includes a first connection portion 101 (plate member connection structure) that connects the outer shell member 20 and the inner shell member 30 at the front, and an outer shell member 20 and an inner shell at the rear of the first connection portion 101. It has the 2nd connection part 102 which connects the member 30, and the 3rd connection part 103 which connects the outer shell member 20 and the inner shell member 30 behind the 2nd connection part 102. The outer shell member 20 is formed with two connecting grooves 20c for connecting with the two arms 3a1 of the support base 3 (see FIG. 2).

  As shown in FIG. 3, the 1st connection part 101 is arrange | positioned ahead of the opening part 20b in the front-back direction. A plurality (four in this embodiment) of the first connecting portions 101 are provided at intervals in the left-right direction. The 2nd connection part 102 is arrange | positioned at the both sides of the opening part 20b. Two second connecting portions 102 are provided in pairs in the left-right direction across the opening 20b. The 3rd connection part 103 is arrange | positioned back rather than the opening part 20b in the front-back direction. A plurality of (three in the present embodiment) third connecting portions 103 are provided at intervals in the left-right direction.

  The first connecting portion 101 engages the outer shell member 20 and the inner shell member 30 by relative movement in the front-rear direction (first direction along the plate surfaces 20a and 30a), and thereby the outer shell member 20 and the inner shell member. 30 is connected to be rotatable about a virtual pivot extending in the left-right direction. The second connecting portion 102 engages the outer shell member 20 and the inner shell member 30 by the relative movement of at least one of the front-rear direction and the up-down direction (second direction intersecting the plate surfaces 20a, 30a). The rotation of the shell member 20 and the inner shell member 30 is restricted. The third connecting portion 103 engages the outer shell member 20 and the inner shell member 30 by relative movement in the vertical direction, and rotates the outer shell member 20 and the inner shell member 30, and the outer shell member 20 The relative movement in the front-rear direction with respect to the inner shell member 30 is restricted.

  As shown in FIG. 4, the outer shell member 20 is provided with a first engaged portion 22 (an engaged portion) that constitutes the first connecting portion 101. The first engaged portion 22 includes a first wall portion 23 (contact portion) and a second wall portion 24 (ceiling portion). The first wall portion 23 stands up in the vertical direction and extends in the left-right direction. The second wall portion 24 stands in the up-down direction behind the first wall portion 23 and extends in the left-right direction. The second wall portion 24 extends upward, then bends forward, and faces the first wall portion 23 in the vertical direction. Between the 1st wall part 23 and the 2nd wall part 24, the opening part 22a opened ahead is formed.

  The outer shell member 20 is formed with a plurality of ribs 21 for increasing rigidity. The plurality of ribs 21 extend in a lattice shape in the front-rear direction and the left-right direction, and extend obliquely at the corners of the outer shell member 20. Sides of the first wall portion 23 and the second wall portion 24 are connected to the rib 21. Thereby, the 1st to-be-engaged part 22 becomes a substantially box shape, and the rigidity of the 1st to-be-engaged part 22 can be improved. In the first engaged portions 22 arranged at both ends in the left-right direction, the first wall portion 23 is connected to the inclined plate surface 20a, and the second wall portion 24 stands up and down and extends in the front-rear direction. Connected to the third wall 25.

  As shown in FIG. 5, the inner shell member 30 has a plurality of slits 30b. The plurality of slits 30 b are arranged at intervals over the entire circumference of the edge of the inner shell member 30. The plurality of slits 30b can follow the aging deformation of the inner shell member 30. Further, the plurality of slits 30 b are misaligned between the outer shell member 20 and the inner shell member 30 due to looseness in engagement at the first connecting portion 101, the second connecting portion 102, and the third connecting portion 103. It can also be absorbed. The inner shell member 30 is provided with a fixing portion 31 for fixing the exterior member 40 on the rear side. A plurality (five in this embodiment) of fixing portions 31 are provided at intervals in the left-right direction.

  As shown in FIG. 6, a first engagement portion 32 (engagement portion) that constitutes the first connection portion 101 is provided on the bottom surface side of the inner shell member 30. The first engagement portion 32 stands up in the vertical direction and extends in the left-right direction. As shown in FIG. 7, the first engaging portion 32 extends downward and then bends backward. The first engaging portion 32 is accommodated in the first engaged portion 22 with a gap in the vertical direction. Specifically, the first engaging portion 32 is accommodated in the first engaged portion 22 by being inserted in the opening 22 a of the first engaged portion 22 in the front-rear direction. The first engagement portion 32 and the first engaged portion 22 are engaged with each other with a predetermined gap, and the outer shell member 20 and the inner shell member 30 are rotated and the inner shell member 30 is elastically deformed in the vertical direction. It is the structure which accepts.

  A hook portion 32 c is provided at the distal end portion 32 a of the first engaging portion 32 accommodated in the first engaged portion 22. The hook portion 32 c is formed in a key shape that forms an acute angle toward the first wall portion 23. The opening 22a of the first engaged portion 22 is larger than the distal end portion 32a (the maximum thickness of the hook portion 32c) of the first engaging portion 32 in the vertical direction. The first engaged portion 22 has an accommodating portion 22 b that accommodates the distal end portion 32 a of the first engaging portion 32. The accommodating portion 22b is a space surrounded by the first wall portion 23, the second wall portion 24, the plate surface 20a, the rib 21 or the third wall portion 25 (see FIG. 4). The accommodating portion 22b communicates with the opening 22a and is larger than the opening 22a in the vertical direction.

  As will be described later, when the inner shell member 30 (one of the first plate member and the second plate member) is elastically deformed into a concave shape in the vertical direction, the first wall portion 23 is indicated by a two-dot chain line in FIG. It arrange | positions on the locus | trajectory of the hook part 32c to displace. The first engaging portion 32 has a proximal end portion 32 b connected to the inner shell member 30. The distal end portion 24a of the second wall portion 24 is located closer to the proximal end portion 32b than the first wall portion 23 in the front-rear direction. The distal end portion 24a faces the base end portion 32b (more specifically, a portion extending in the up-down direction before being bent rearward of the first engaging portion 32) in the front-rear direction.

  The inner shell member 30 has a bent portion 30c at the edge of the plate surface 30a outside the base end portion 32b. The bent portion 30c increases the bending rigidity at the edge of the plate surface 30a. The bent portion 30c is bent at least in the vertical direction and then bent in the front-rear direction. Specifically, the bent portion 30c of the present embodiment bends upward with respect to the plate surface 30a, then bends forward, and further bends in a substantially U-shape that bends downward. The base end portion 32b of the first engagement portion 32 is adjacent to the bending start point of the bent portion 30c.

As shown in FIG. 4, the outer shell member 20 is provided with a third engagement portion 26 that constitutes a third connection portion 103. The third engagement portion 26 has a pin shape that stands up and down. A pair of third engagement claw portions 26 a is provided at the upper end portion of the third engagement portion 26. The pair of third engaging claws 26 a protrudes laterally from the main body of the third engaging portion 26.
Further, as shown in FIG. 6, the inner shell member 30 is provided with a third engaged portion 33 constituting the third connecting portion 103. The third engaged portion 33 is a hole that penetrates in the vertical direction.

  As shown in FIG. 8, the third engagement portion 26 engages with the third engaged portion 33. The third engaged portion 33 has a pair of third engaged claws 34 on which the third engaging portion 26 is hooked. The pair of third engaged claws 34 are inclined so as to gradually approach each other upward. When the third engaging portion 26 is inserted into the third engaged portion 33 in the vertical direction, the pair of third engaging claw portions 26 a is elastic in a direction separating the pair of third engaged claw portions 34. Deform. When the third engaging claw portion 26a passes through the third engaged claw portion 34, the pair of third engaged claw portions 34 returns to their original positions, and the return of the third engaging claw portion 26a is the third covered claw portion 34a. By being hooked on the engaging claw portion 34, the third engaging portion 26 and the third engaged portion 33 are engaged.

  When the third engaging portion 26 and the third engaged portion 33 are engaged, the vertical movement is restricted, and the rotation of the outer shell member 20 and the inner shell member 30 is restricted. Further, when the third engaging portion 26 and the third engaged portion 33 are engaged, the movement in the front-rear and left-right plane directions is restricted, and in particular, the outside in the front-rear direction in which the engagement state of the first connecting portion 101 is released. The relative movement between the shell member 20 and the inner shell member 30 is restricted. As shown in FIG. 4, the third connecting portions 103 (third engaging portions 26) arranged at both left and right end portions are different from the third connecting portions 103 arranged at the left and right center portions in plan view. It is provided in an oblique direction that becomes a C-shape. This is due to the following reason.

  The third engagement portion 26 needs to slide the mold for resin molding in a direction intersecting the vertical direction due to the undercut shape of the third engagement claw portion 26a. This is because ribs 21 are formed on the outer shell member 20, and the mold cannot be slid to a portion that interferes with the ribs 21, so that the mold is slid in an oblique direction that does not interfere with the ribs 21. In addition, since the direction of the aged deformation of the third engaged portion 33 of the inner shell member 30 is not constant at the corner portion of the outer shell member 20, it can cope with both the longitudinal deformation in the front-rear direction and the left-right direction. It is to do. Specifically, the third engaging portion 26 has a thin plate-like leg portion 26b, and bends in the thickness direction of the leg portion 26b even when the inner shell member 30 is deformed in either the front-rear direction or the left-right direction. Can be elastically deformed. Accordingly, in the third engagement portion 26, it is not necessary to make it difficult to deform in the other direction in order to allow the ease of deformation in either the front-rear direction or the left-right direction. In addition, the inner shell member 30 of the present embodiment has a curved shape so that the central portion is convex downward, and the deformation direction to the third engagement portion 26 is difficult to be constant. By making the portion 26 in an oblique direction, it is possible to effectively cope with the deformation of the inner shell member 30.

  As shown in FIG. 6, the inner shell member 30 is provided with a second engaging portion 35 that constitutes the second connecting portion 102. As shown in FIG. 9, the second engagement portion 35 has an inward engagement claw portion 35a facing the inner side in the plane direction of the inner shell member 30, and an outer side facing the outer side in the plane direction of the inner shell member 30 as shown in FIG. And an orientation engaging claw portion 35b. As shown in FIG. 6, the second engagement portion 35 has two outward engagement claw portions 35b, and the inward engagement claw portion 35a is disposed between the two outward engagement claw portions 35b. ing. That is, in the front-rear direction, the outward engagement claw portion 35b, the inward engagement claw portion 35a, and the outward engagement claw portion 35b are arranged in this order. As described above, the second engaging portion 35 is configured such that the three claws are alternately arranged and each of the claws can be elastically deformed in the left-right direction.

  Further, as shown in FIG. 4, the outer shell member 20 is provided with a second engaged portion 27 constituting the second connecting portion 102. The second engaged portion 27 includes a pair of second engaged claw portions 28 that face each other in the left-right direction, and a wall portion 29 that is connected to the pair of second engaged claw portions 28. As shown in FIG. 9, the inward engagement claw portion 35 a is engaged with one of the pair of second engaged claw portions 28 arranged on the inner side in the planar direction of the outer shell member 20. As shown in FIG. 10, the outward engagement claw portion 35 b engages with the other of the pair of second engaged claw portions 28 arranged on the outer side in the planar direction of the outer shell member 20. When the second engaging portion 35 and the second engaged portion 27 are engaged, the vertical movement is restricted, and the rotation of the outer shell member 20 and the inner shell member 30 is restricted.

  Further, as shown in FIG. 6, the inner shell member 30 is provided with a pair of ribs 36 with the second engagement portion 35 interposed therebetween in the front-rear direction. The rib 36 stands in the up-down direction of the inner shell member 30 and extends in the left-right direction. As shown in FIG. 11, the lower end portion of the rib 36 extending downward is in contact with the upper end portion of the rib 21 of the outer shell member 20. When the rib 36 and the rib 21 come into contact with each other, the outer shell member 20 and the inner shell member 30 are positioned in the vertical direction at the second connecting portion 102. Thereby, it is possible to prevent the second engaging portion 35 from going too far downward with respect to the second engaged portion 27.

  In the connection structure 100 having the above configuration, when the outer shell member 20 and the inner shell member 30 are engaged with each other, first, the engagement operation in the first connection portion 101 is performed. Specifically, the first engaged portion 22 of the outer shell member 20 and the first engaging portion 32 of the inner shell member 30 are engaged by a relative movement in the front-rear direction along the plate surface 20a. As a result, the inner shell member 30 is rotatably connected to the outer shell member 20 with the front as a rotation fulcrum. Next, the rear of the inner shell member 30 is rotated downward, and the engagement operation at the second connecting portion 102 and the third connecting portion 103 is performed. Specifically, in the second direction intersecting the plate surface 20a, the second engaging portion 35 and the second engaged portion 27 of the second connecting portion 102 are engaged, and the third connecting portion 103 of the third connecting portion 103 is engaged. The third engaging portion 26 and the third engaged portion 33 are engaged. Thereby, the load support structure 10 in which the outer shell member 20 and the inner shell member 30 are connected is obtained.

  Subsequently, the elastic deformation when a load is applied in the vertical direction to the load support structure 10 having the above configuration and the operation in the first connecting portion 101 when the elastic deformation is performed will be described with reference to FIG.

FIG. 12 is a conceptual diagram for explaining the elastic deformation of the load support structure 10 and the operation in the first connecting portion 101 in the embodiment of the present invention.
As shown in FIG. 12, when a seated person's load is applied to the up-down direction which cross | intersects the plate | board surface 30a of the inner shell member 30 via the exterior member 40, the inner shell member 30 will be elastically deformed concavely in the up-down direction. The outer shell member 20 that supports the inner shell member 30 has an opening 20b, and allows elastic deformation in which the central portion of the plate surface 30a of the inner shell member 30 is recessed downward.

  As shown in FIG. 4, in the first connecting portion 101, the first engaging portion 32 is accommodated in the first engaged portion 22 with a gap in the vertical direction intersecting the plate surface 20a. Elastic deformation of the member 20 and the inner shell member 30 in the vertical direction can be allowed. Here, when the central portion of the plate surface 30a of the inner shell member 30 is recessed downward, the warp (inclination) of the plate surface 30a increases, and the first engaging portion 32 and the first engaged portion 22 are moved in the front-rear direction. In the direction of separating from each other (the direction in which the engagement state between the first engaging portion 32 and the first engaged portion 22 is released).

  As shown in FIG. 12, the first connecting portion 101 of this embodiment is provided with a first wall portion 23 in the first engaged portion 22. The first wall portion 23 comes into contact with the first engagement portion 32 in the front-rear direction when the inner shell member 30 that has received the load is elastically deformed in a concave shape in the vertical direction. Since the first wall portion 23 and the first engaging portion 32 are in contact with each other, the first engaging portion 32 and the first engaged portion 22 are prevented from being separated in the front-rear direction. Accordingly, it is possible to prevent the engagement state of the first connecting portion 101 from being released while allowing elastic deformation.

  In the present embodiment, the first engaging portion 32 has a hook portion 32c on which the first wall portion 23 is disposed on a locus that is displaced when the inner shell member 30 is elastically deformed. According to this configuration, the inner shell member 30 that receives the load is brought into contact with the first wall portion 23 on a locus that is displaced when the inner shell member 30 is elastically deformed in a concave shape in the vertical direction, and the displacement of the first engagement portion 32 is regulated. can do. That is, the first engaging portion 32 can be displaced within a range that allows the elastic deformation of the inner shell member 30, and the displacement within the range in which the engaged state is released is regulated. Further, by mechanically hooking the first wall portion 23 by the hook portion 32c, it is possible to reliably prevent the engagement state of the first connecting portion 101 from being released as compared with the conventional engagement by friction.

  In the present embodiment, the first engaged portion 22 communicates with the opening 22a and the opening 22a into which the first engaging portion 32 is inserted by relative movement in the front-rear direction, and the opening 22a in the vertical direction. And a larger accommodating portion 22b. According to this configuration, since the accommodating portion 22b is larger in the vertical direction than the opening 22a in the first engaged portion 22, the distal end portion 24a of the first engaging portion 32 is displaced in the vertical direction in the accommodating portion 22b. It becomes easy to do. If the distal end portion 24a of the first engaging portion 32 is greatly displaced in the up-and-down direction in the housing portion 22b, it is difficult to remove from the opening portion 22a, and thus the engagement state in the first connecting portion 101 can be more reliably prevented. it can.

  In the present embodiment, the first engaging portion 32 has a base end portion 32 b connected to the inner shell member 30, and the first engaged portion 22 faces the first wall portion 23 in the vertical direction. The distal end portion 24a of the second wall portion 24 is located closer to the proximal end portion 32b than the first wall portion 23 in the front-rear direction. According to this configuration, when the base end portion 32 b of the first engagement portion 32 is displaced in the vertical direction away from the first wall portion 23, the second wall portion 24 facing the first wall portion 23 is 1 engaging part 32 contacts. Further, since the distal end portion 24a of the second wall portion 24 is located on the base end portion 32b side of the first wall portion 23 in the front-rear direction, a moment load is applied from the distal end portion 24a to the first engaging portion 32. By giving, the front-end | tip part of the 1st engaging part 32 can be made easy to adjoin to the 1st wall part 23. FIG.

  Further, in this embodiment, as shown in FIG. 7, the inner shell member 30 is bent at least in the vertical direction at the edge of the plate surface 30a outside the base end portion 32b and then bent in the front-rear direction. Part 30c. According to this structure, the bending part 30c can be provided in the outer side of the base end part 32b of the 1st engaging part 32, and the rigidity of the edge part of the plate surface 30a can be improved. Accordingly, the edge of the plate surface 30a is hardly elastically deformed, and elastic deformation starts from the inside of the bent portion 30c. Therefore, the first engaging portion 32 having the base end portion 32b on the inner side of the bent portion 30c. A moment load can be applied to the first engaging portion 32 so that the distal end portion 32 a can be easily brought close to the first wall portion 23.

  As described above, according to the above-described embodiment, it is possible to prevent the engagement state between the inner shell member 20 and the outer shell member 20 from being released while allowing the first connecting portion 101 to elastically deform the inner shell member 30. A load support structure 10 is obtained. Further, it is possible to obtain the chair 1 that can prevent the engagement state from being released while allowing elastic deformation, and can give a soft feel to the seated person.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

For example, in the above embodiment, the configuration in which the first engaged portion 22 is provided in the outer shell member 20 and the first engaging portion 32 is provided in the inner shell member 30 has been described, but the present invention is limited to this configuration. Instead, the first engaging portion 32 may be provided on the outer shell member 20, and the first engaged portion 22 may be provided on the inner shell member 30.
Moreover, in the said embodiment, although the 3rd engaging part 26 was provided in the outer shell member 20, and the structure which provided the 3rd to-be-engaged part 33 in the inner shell member 30 was demonstrated, this invention is limited to this structure. Instead, the third engaging portion 26 may be provided in the inner shell member 30 and the third engaged portion 33 may be provided in the outer shell member 20.

  Further, for example, in the above-described embodiment, the configuration in which the first connecting portion 101 according to the present invention is applied to the load support structure 10 has been described. However, the present invention is not limited to this configuration, and the first configuration according to the present invention. The one connecting portion 101 can be applied to a wide field other than the load support structure 10 of the chair 1.

  Further, for example, in the above embodiment, the configuration in which the load support structure 10 including the connection structure 100 is applied to the seat 4 has been described. However, the present invention is not limited to this configuration, and the load support structure according to the present invention. 10 may be applied to the backrest 5, or may be applied to both the seat 4 and the backrest 5.

1 chair 4 seat 5 backrest 10 load support structure (chair load support structure)
20 Outer shell member (first plate member, the other)
20a Plate surface 22 First engaged portion (engaged portion)
22a Opening part 22b Housing part 23 1st wall part (contact part)
24 Second wall (ceiling)
24a Tip 30 Inner shell member (second plate member, one side)
30a Plate surface 30c Bending portion 32 First engaging portion (engaging portion)
32b Base end part 32c Hook part 40 Exterior member
101 1st connection part (connection structure of a plate member)

Claims (7)

A plate member connection structure for connecting the first plate member and the second plate member by relative movement in the first direction along the plate surface,
An engagement portion provided on one of the first plate member and the second plate member;
An engaged portion that is provided on the other of the first plate member and the second plate member and accommodates the engaging portion with a gap in a second direction intersecting the plate surface;
The engagement portion includes a contact portion that contacts the engagement portion in the first direction when the one elastically deforms in a concave shape in the second direction. Construction.   The said engaging part has a hook part contact | abutted to the said contact part arrange | positioned on the locus | trajectory displaced when the said one elastically deforms, The connection of the board member of Claim 1 characterized by the above-mentioned. Construction. The engaged portion is
An opening into which the engaging portion is inserted by relative movement in the first direction;
The plate member connection structure according to claim 1, further comprising: an accommodating portion that communicates with the opening and is larger than the opening in the second direction. The engagement portion has a proximal end portion connected to the one side,
The engaged portion has a ceiling portion facing the contact portion in the second direction,
4. The plate member according to claim 1, wherein a distal end portion of the ceiling portion is located closer to the base end portion than the contact portion in the first direction. Connection structure. The engagement portion has a proximal end portion connected to the one side,
The one side has at least one bent portion bent in the first direction after being bent in the second direction at an edge portion of the plate surface outside the base end portion. The connection structure of the board member as described in any one of claim | item 1 -4. A load supporting structure for a chair comprising a plate-like outer shell member, a plate-like inner shell member supported by the outer shell member, and an exterior member supported by the inner shell member,
The load support of the chair characterized by having the connection structure of the plate member as described in any one of Claims 1-5 as a connection structure of the plate member which connects the said outer shell member and the said inner shell member. Construction.   A chair comprising at least one of a seat and a backrest provided with the load supporting structure of the chair according to claim 6.

Images