JP6468855B2 - 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

  By the way, in recent years, it has been proposed that an edge portion of a load supporting structure of a chair such as a seat or a backrest is made thin in consideration of design. Since the edge portion of the load support structure is separated from the portion receiving the load from the seated person, the load can be received without any problem even if it is thinned. However, the edge portion of the load support structure has an engagement allowance for engaging a tension member that wraps the seat plate, and a seated person can easily put a finger on a portion where the tension member is engaged. There may be a force acting to tear off the horizontal plate portion. Then, since the edge of the load support structure is thin and has low rigidity, the force cannot be sufficiently received. In the cushion cushion mounting structure of the chair described in Patent Document 1, the force acts as an excessive load on the engaging portion between the dowel of the seat plate and the mounting hole of the horizontal plate portion. There is.

  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 reduce the load applied to the engaging portion.

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 that connects the first plate member and the second plate member with the plate surfaces aligned, and includes the first plate member and the second plate member. An engaging portion provided on one side and an engaged portion provided on the other of the first plate member and the second plate member and engaged with the engaging portion in a first direction intersecting the plate surface; The one edge portion includes a first plane portion extending along the first direction, and an end portion on the side spaced from the other of the first plane portion, A bent portion including a second flat surface portion extending in a second direction intersecting the first direction is provided, and the engaging portion is located on an extension line of the first flat surface portion and protrudes from the other. It has the engagement protrusion provided, It is characterized by the above-mentioned.
According to this configuration, by providing the bent portion at one edge portion of the plate member provided with the engaging portion, the rigidity can be increased without increasing the thickness of the plate member at the edge portion. Further, the bent portion has a first plane portion in which the second plane portion is connected to an end portion on the side separated from the other of the plate member provided with the engaged portion, and the first plane portion is The plate member extends in a first direction that intersects the plate surface on which a force to peel the plate members acts. The engaging portion has an engaging protrusion protruding from the other of the plate members, and the engaging protrusion is located on an extension line of the first flat surface portion. The force in the first direction received by the engaging protrusion acts on the bent portion having high rigidity without changing the direction of the force. For this reason, the force which an engaging protrusion receives can be absorbed in a bending part, and the load concerning an engaging part can be reduced.

Moreover, in the connection structure of the plate member which concerns on this invention, it is spaced apart with respect to the said other of the 3rd plane part extended along the said 1st direction at the said one edge part, and the said 3rd plane part. A second bent portion is provided that includes a fourth plane portion that extends in the second direction from the end portion to be connected to the end portion on the side adjacent to the other of the first plane portions. It is characterized by that.
According to this configuration, the second bent portion can be further provided at one edge portion of the plate member, and the rigidity can be further increased by forming a stepped shape at the edge portion. Further, the second bent portion is located closer to the center side of the plate surface than the engaging protrusion. For this reason, even if a load acts from the seated person on the center side of the plate surface, the load applied to the engaging protrusion due to the load can be reduced by the second bent portion.

In the plate member connection structure according to the present invention, the engaging portion includes a second engaging protrusion that protrudes from the fourth plane portion to the other. is there.
According to this configuration, it is possible to disperse the force in the first direction in which the second engaging protrusion is protruded from the fourth flat portion of the second bent portion and the plate members are to be peeled off. Further, since the second bent portion is also highly rigid, and the fourth flat portion provided with the second engaging protrusion is also a strong portion against the force in the first direction, the force in the first direction is applied to the second bent portion. It can absorb and the load concerning a 2nd engagement protrusion can be reduced.

In the plate member connection structure according to the present invention, the engagement portion has more engagement protrusions than the second engagement protrusions.
According to this structure, more engagement protrusions are provided than the second engagement protrusion. Since the engaging protrusion is located on the extension line of the first flat surface portion of the bent portion, the engaging protrusion is stronger than the second engaging protrusion in the force in the first direction that tries to peel off the plate members. By increasing the number of the engaging protrusions more than the number of the second engaging protrusions, it is possible to efficiently increase the strength of the engaging portions and to disperse the force for separating the plate members. .

Further, in the plate member connection structure according to the present invention, the one edge portion includes both end portions of the bent portion and the second bent portion in a third direction intersecting the first direction and the second direction. A closing portion for closing the cover is provided.
According to this configuration, both ends of the bent portion and the second bent portion in the third direction are closed by the closing portion, so that a box shape can be obtained, and rigidity at the bent portion and the second bent portion is further increased. Can do.

The load supporting 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 support structure of a chair provided, wherein the plate member connection structure described above is provided as a plate member connection structure for connecting the outer shell member and the inner shell member. .
According to this structure, the load support structure of the chair which can reduce the load concerning the engaging part of an outer shell member and an inner shell member is obtained.

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 any one of a backrest, It is characterized by the above-mentioned.
According to this configuration, since it is difficult to release the connection at the edge of the load support structure, a chair having excellent design properties in which the thickness of the edge of the load support structure is reduced can be obtained.

  According to this invention, the connection structure of the board member which can reduce the load concerning an engaging part, the load support structure of a chair, and a chair are obtained.

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 effect | action in the 2nd connection part 102 in embodiment of this invention.

  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 connecting structure 100 includes a first connecting portion 101 that connects the outer shell member 20 and the inner shell member 30 at the front, and a first connecting portion that connects the outer shell member 20 and the inner shell member 30 at the rear of the first connecting portion 101. 2 connection part 102 (plate member connection structure), and the 3rd connection part 103 which connects the outer shell member 20 and the inner shell member 30 in the back rather than 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, and rotates the outer shell member 20 and the inner shell member 30 about a virtual pivot extending in the left-right direction. It is connected freely. 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 (first 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 constituting the first connecting portion 101. The first engaged portion 22 has a first wall portion 23 and a second wall portion 24. 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 extends to above the first wall portion 23. 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 constituting the first connecting 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 engages with the first engaged portion 22 through the opening 22a. Specifically, the hook-shaped tip 32a of the first engaging portion 32 is inserted into the opening 22a of the first engaged portion 22 in the front-rear direction, so that the first engaging portion 32 and the first engaging portion 32 are The engaged portion 22 is engaged. The first engaging portion 32 and the first engaged portion 22 are engaged with a predetermined play, and are configured to allow the outer shell member 20 and the inner shell member 30 to rotate.

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 (engaging portion) constituting the second connecting portion 102. The second engaging portion 35 is located at the edge 30 c of the inner shell member 30. The second engagement portion 35 includes a first engagement protrusion 35a (engagement protrusion) and a second engagement protrusion 35b. The first engagement protrusion 35 a includes a hook-shaped tip that faces the outer side in the planar direction of the inner shell member 30. On the other hand, the second engagement protrusion 35 b includes a hook-shaped tip that faces the inner side in the planar direction of the inner shell member 30.

The second engagement part 35 has more first engagement protrusions 35a than the second engagement protrusions 35b. In the present embodiment, the second engagement part 35 has two first engagement protrusions 35a, One two-engagement protrusion 35b is provided.
In the front-rear direction, the second engagement protrusion 35b is disposed between the two first engagement protrusions 35a. That is, in the front-rear direction, the first engagement protrusion 35a, the second engagement protrusion 35b, and the first engagement protrusion 35a 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 (an engaged portion) 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 second engagement protrusion 35 b engages with one of the pair of second engaged claws 28 arranged on the inner side in the planar direction of the outer shell member 20. Further, as shown in FIG. 10, the first engagement protrusion 35 a is engaged with the other of the pair of second engaged claws 28 that is disposed 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.

Further, as shown in FIG. 5, a first bent portion 37 (bent portion) and a second bent portion 38 are provided on the edge portion 30 c of the inner shell member 30. A second engaging portion 35 is disposed on the bottom surface side of the first bent portion 37 and the second bent portion 38 (see FIG. 6).
As shown in FIG. 10, the first bent portion 37 includes a first flat portion 37a and a second flat portion 37b. The 1st plane part 37a is a site | part extended along an up-down direction. The second plane part 37b is a part extending in the left-right direction (second direction intersecting the first direction) from the end part 37a1 on the side separated from the outer shell member 20 of the first plane part 37a. A plurality of first openings 37b1 are formed in the second plane portion 37b for removing a mold for resin-molding the first engagement protrusion 35a (see FIG. 6).

  The first engaging protrusion 35a is located on an extension line of the first flat surface portion 37a. The outward side surface 35a1 of the first engaging protrusion 35a is continuous with the outward side surface 37a3 of the first flat surface portion 37a. Further, the outward side surface 35a1 of the first engagement protrusion 35a and the outward side surface 37a3 of the first flat surface portion 37a are both connected to one side surface of the first opening portion 37b1, and are simultaneously formed by the same mold. Further, the inward side surface 35a2 of the first engagement protrusion 35a is located on the outer side (the left side of the drawing) than the inward side surface 37a4 of the first flat surface portion 37a. That is, the thickness in the left-right direction of the first flat surface portion 37a is larger than the thickness in the left-right direction of the portion extending in the vertical direction of the first engagement protrusion 35a.

  As shown in FIG. 10, the second bent portion 38 includes a third plane portion 38a and a fourth plane portion 38b. The 3rd plane part 38a is a site | part extended along an up-down direction. The fourth flat surface portion 38b extends in the left-right direction from the end portion 38a1 on the side away from the outer shell member 20 of the third flat surface portion 38a, and is close to the outer shell member 20 of the first flat surface portion 37a. It is a site | part connected to the edge part 37a2 of the side to perform. The fourth flat portion 38b is formed with a second opening 38b1 for removing a mold for resin-molding the second engagement protrusion 35b (see FIGS. 6 and 9).

  As shown in FIG. 9, the second engagement protrusion 35 b protrudes from the fourth flat surface 38 b with respect to the outer shell member 20. The outward side surface 35b1 of the second engagement protrusion 35b is located on a substantially extended line of the inward side surface 37a4 of the first flat surface portion 37a. In addition, the inward side surface 35b2 of the second engagement protrusion 35b is located on the inner side of the inward side surface 37a4 of the first flat surface portion 37a. The inward side surface 35b2 of the second engagement protrusion 35b is continuous with one side surface of the second opening 38b1.

  As shown in FIG. 5, the second bent portion 38 is located above the portion of the plate surface 30 a that receives a load from the seated person. Further, the first bent portion 37 is located above the second bent portion 38. The edge portion 30c of the inner shell member 30 has a closing portion 39 that closes both ends of the first bent portion 37 and the second bent portion 38 in the front-rear direction (a third direction intersecting the first direction and the second direction). Is provided. By the blocking part 39, the first bent part 37 and the second bent part 38 are box-shaped, and the rigidity of the part where the second engaging part 35 is provided can be increased.

  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, with reference to FIG. 12, the action in the second connecting portion 102 when a force to peel the outer shell member 20 and the inner shell member 30 is applied to the load support structure 10 having the above configuration. explain.

FIG. 12 is a conceptual diagram for explaining the operation of the second connecting portion 102 in the embodiment of the present invention.
As shown in FIG. 12, the left and right edges of the load support structure 10 are shown thin in consideration of design. However, as a result, the engagement margin of the outer member 40 with respect to the edge 30c of the inner shell member 30 is reduced, and a seated person is placed on the portion (the bottom side of the edge 30c of the inner shell member 30) with which the outer member 40 is engaged. Will be easier to put fingers. When a finger is applied by a seated person, even if the force is slight, a vertical force that tries to peel off the outer shell member 20 and the inner shell member 30 is applied to the second engaging portion 35. Load is applied.

  The second engaging portion 35 of the present embodiment is located on an extension line of the first flat portion 37 a of the first bent portion 37, and the first engaging protruding portion 35 a that protrudes from the outer shell member 20. Have. The first bent portion 37 is provided at the edge 30c of the inner shell member 30, and the rigidity can be increased without increasing the thickness of the inner shell member 30 at the edge 30c. The first bent portion 37 includes a first flat portion 37a in which the second flat portion 37b is connected to an end portion 37a1 on the side away from the outer shell member 20 provided with the second engaged portion 27. The first flat surface portion 37a extends in the vertical direction in which a force is applied to peel off the outer shell member 20 and the inner shell member 30. The second engagement portion 35 has a first engagement projection 35a protruding from the outer shell member 20 of the plate member, and the first engagement projection 35a is on an extension line of the first flat surface portion 37a. Is located. For this reason, the force in the vertical direction received by the first engagement protrusion 35a acts on the first bending portion 37 having high rigidity without changing the direction of the force (see the arrow in FIG. 12). For this reason, the force received by the first engaging protrusion 35a can be transmitted to the first bent portion 37 and absorbed, and the load on the second engaging portion 35 can be reduced.

  In the present embodiment, the edge portion 30c of the inner shell member 30 has a third flat surface portion 38a extending in the vertical direction, and a side of the third flat surface portion 38a that is separated from the outer shell member 20. A second bent portion 38 including a fourth plane portion 38b extending in the left-right direction from the end portion 38a1 of the first plane portion 37a and continuing to the end portion 37a2 on the side close to the outer shell member 20 of the first plane portion 37a is provided. ing. According to this configuration, the second bent portion 38 is provided on the edge portion 30c of the inner shell member 30, and the edge portion 30c is stepped to further increase the rigidity. Moreover, the 2nd bending part 38 is located in the center side of the plate surface 30a rather than the 1st engagement protrusion 35a. For this reason, even if a load acts on the center side of the plate surface 30a, the second bending portion 38 reduces a load (such as a bending load) applied to the first engagement protrusion 35a due to the load. it can.

  Moreover, in this embodiment, as shown in FIG. 9, the 2nd engaging part 35 has the 2nd engaging protrusion 35b protruded with respect to the outer shell member 20 from the 4th plane part 38b. According to this configuration, the force in the vertical direction that attempts to peel off the outer shell member 20 and the inner shell member 30 can be distributed to the first engagement protrusion 35a and the second engagement protrusion 35b. . Further, the second bent portion 38 is also highly rigid, and the fourth flat portion 38b on which the second engaging protrusion 35b protrudes is also a portion that is strong against the force in the vertical direction. The load applied to the second engaging portion 35 can be reduced.

  Further, in the present embodiment, as shown in FIG. 6, the first engagement protrusions 35a are more protruded than the second engagement protrusions 35b. Since the first engagement protrusion 35a is located on the extension line of the first flat surface portion 37a of the first bent part 37, the outer shell member 20 and the inner shell member 30 are connected to each other more than the second engagement protrusion 35b. The pulling is strong against the vertical force that it tries to peel off. By increasing the number of the first engagement protrusions 35a more than the number of the second engagement protrusions 35b, the force in the vertical direction can be dispersed while efficiently increasing the strength of the second engagement part 35. .

  In the present embodiment, as shown in FIG. 5, the edge portion 30 c of the inner shell member 30 has a closing portion 39 that closes both ends of the first bent portion 37 and the second bent portion 38 in the front-rear direction. Is provided. According to this configuration, the first bent portion 37 and the second bent portion 38 can be box-shaped, and the rigidity in the first bent portion 37 and the second bent portion 38 can be further increased. The effect can be enhanced.

  Thus, according to the above-described embodiment, the load support structure 10 that can reduce the load applied to the second engaging portion 35 in the second connecting portion 102 that connects the outer shell member 20 and the inner shell member 30 is obtained. It is done. Moreover, since it becomes difficult to cancel | release the connection in the edge part of the left-right direction of the load support structure 10, the chair 1 excellent in the designability which made the thickness of the edge part of the left-right direction of the load support structure 10 thin is obtained.

  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 second engaged portion 27 is provided in the outer shell member 20 and the second engaging portion 35 is provided in the inner shell member 30 has been described, but the present invention is limited to this configuration. Instead, the second engaged portion 27 may be provided on the inner shell member 30 and the second engaging portion 35 may be provided on the outer shell member 20.
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 embodiment, the configuration in which the second connecting portion 102 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 second configuration according to the present invention is described. The two connecting portions 102 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 second connecting portion 102 is applied to the seat 4 has been described. However, the present invention is not limited to this configuration, and the load according to the present invention is not limited. The support structure 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 27 Second engaged portion (engaged portion)
30 Inner shell member (second plate member, one side)
30a Plate surface 30c Edge 35 Second engaging portion (engaging portion)
35a 1st engagement protrusion (engagement protrusion)
35b 2nd engagement protrusion 37 1st bending part (bending part)
37a 1st plane part 37a1 end part 37a2 end part
37b 2nd plane part 38 2nd bending part 38a 3rd plane part 38a1 End part 38b 4th plane part 39 Closure part 102 2nd connection part (connection structure of a plate member)

Claims (6)

A plate member connection structure for connecting the first plate member and the second plate member by aligning the plate surfaces,
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 engages with the engaging portion in a first direction that intersects the plate surface;
The one edge portion intersects the first direction from a first flat surface portion extending along the first direction and an end portion of the first flat surface portion on the side separated from the other. A bent portion including a second plane portion extending in the second direction is provided,
The engaging portion is positioned on an extension line of the first flat section, it has a engaging projection which projects relative to the other,
The one edge portion further includes a third plane portion extending along the first direction, and an end portion of the third plane portion on the side separated from the other side in the second direction. And a second bent part including a fourth flat part extending to the end of the first flat part adjacent to the other side of the first flat part. . 2. The plate member connection structure according to claim 1 , wherein the engagement portion includes a second engagement protrusion that protrudes from the fourth plane portion to the other side. The plate member connection structure according to claim 2 , wherein the engagement portion has more engagement protrusions than the second engagement protrusions. The one edge is provided with a closing portion that closes both ends of the bent portion and the second bent portion in a third direction intersecting the first direction and the second direction. The plate member connection structure according to any one of claims 1 to 3 , wherein the plate member connection structure is provided. 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 1-4 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 5 .

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