JP6468855B2 - Plate member connection structure, chair load support structure, and chair - Google Patents

Description

本発明は、板部材の連結構造、椅子の荷重支持構造、及び椅子に関するものである。   The present invention relates to a plate member connection structure, a chair load support structure, and a chair.

上記技術分野に関する板部材の連結構造として、例えば下記特許文献１に記載された椅子のクッション座板取付構造が知られている。
特許文献１に記載された椅子のクッション座板取付構造は、椅子本体の水平板部の上面の前縁寄りに先端が後方を向いたフックを複数個横並状に突設すると共に、該水平板部の中央から後方寄りにわたり数個の取付孔を開設し、上面にクッション材を張設してなる座板の前縁寄りにはフックが係合する係合孔を開設し、さらに該座板の下面に取付孔に着脱自在に嵌着し得る拡張自在な先端部を有した硬弾性プラスチック製のダボを設けてなる。 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.

この椅子のクッション座板取付構造において、水平板部と座板との相互連結は、先ず、水平板部の板面に沿う第１方向に座板を相対移動させて、水平板部の前縁寄りに設けたフックに、座板の係合孔を係合させる。次に、フックと係合孔との連結部を回動支点として、座板の後方を水平板部の板面と交差する第２方向に相対移動させ、座板のダボを水平板部の取付孔に係合させる。このような連結構造は、各連結部の係合方向が異なっていることから、一方の係合状態が他方の係合によって解除され難くなる点で優れる。   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.

実開平７−３３１４８号公報Japanese Utility Model Publication No. 7-33148

ところで、近年においては、座や背凭れ等の椅子の荷重支持構造の縁部を、意匠性を配慮して薄く見せることが提案されている。荷重支持構造体の縁部は、着座者から荷重を受ける部位から離間しているため、薄くしても問題なく荷重を受けることができる。しかしながら、荷重支持構造体の縁部は、座板を包む張材が係合する係合代があり、この張材が係合している部位に対して着座者が手指を掛け易く、座板と水平板部とを引きはがそうとする力が作用することがある。そうすると、荷重支持構造の縁部は、薄く剛性が低いため、その力を十分に受けることができない。特許文献１に記載された椅子のクッション座板取付構造においては、その力が、座板のダボと水平板部の取付孔との係合部に対して過大な負荷として作用してしまうという問題がある。   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.

本発明は、上記問題点に鑑みてなされたものであり、係合部にかかる負荷を低減できる板部材の連結構造、椅子の荷重支持構造、及び椅子の提供を目的とする。   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.

この発明に係る板部材の連結構造では、上記の課題を解決するために以下の構成を採用した。
この発明に係る板部材の連結構造は、板面を合わせて第１板部材と第２板部材とを連結する板部材の連結構造であって、前記第１板部材及び前記第２板部材の一方に設けられた係合部と、前記第１板部材及び前記第２板部材の他方に設けられ、前記板面と交差する第１方向で前記係合部と係合する被係合部と、を有し、前記一方の縁部には、前記第１方向に沿って延在する第１平面部、及び、前記第１平面部の前記他方に対して離間する側の端部から、前記第１方向と交差する第２方向に延在する第２平面部を含む屈曲部が設けられ、前記係合部は、前記第１平面部の延長線上に位置して、前記他方に対して突設された係合突部を有する、ことを特徴とするものである。
この構成によれば、係合部が設けられた板部材の一方の縁部に屈曲部を設けることによって、縁部において板部材の厚みを大きくすることなく剛性を高めることができる。また、屈曲部は、被係合部が設けられた板部材の他方に対して離間する側の端部に第２平面部が接続された第１平面部を有し、第１平面部は、板部材同士を引きはがそうとする力が作用する板面と交差する第１方向に延在している。そして、係合部は、板部材の他方に突設された係合突部を有し、この係合突部が第１平面部の延長線上に位置している。この係合突部が受ける第１方向の力は、力の向きを変えることなく剛性が高い屈曲部に作用する。このため、係合突部が受ける力を屈曲部で吸収でき、係合部にかかる負荷を低減できる。 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.

また、この発明に係る板部材の連結構造において、前記一方の縁部には、前記第１方向に沿って延在する第３平面部、及び、前記第３平面部の前記他方に対して離間する側の端部から、前記第２方向に延在し、前記第１平面部の前記他方に対して近接する側の端部に連なる第４平面部を含む第２屈曲部が設けられている、ことを特徴とするものである。
この構成によれば、板部材の一方の縁部に、さらに第２屈曲部を設け、縁部において階段状にして剛性をさらに高めることができる。また、第２屈曲部は、係合突部よりも板面の中央側に位置する。このため、板面の中央側に着座者から荷重が作用しても、第２屈曲部によって、その荷重に起因して係合突部にかかる負荷を低減できる。 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.

また、この発明に係る板部材の連結構造において、前記係合部は、前記第４平面部から前記他方に対して突設された第２係合突部を有する、ことを特徴とするものである。
この構成によれば、第２屈曲部の第４平面部から第２係合突部を突設し、板部材同士を引きはがそうとする第１方向の力を分散させることができる。また、第２屈曲部も剛性が高く、第２係合突部が突設された第４平面部も第１方向の力に強い部位であるため、第１方向の力を第２屈曲部で吸収でき、第２係合突部にかかる負荷を低減できる。 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.

また、この発明に係る板部材の連結構造において、前記係合部は、前記係合突部を、前記第２係合突部より多く有する、ことを特徴とするものである。
この構成によれば、第２係合突部よりも係合突部が多く突設される。係合突部は、屈曲部の第１平面部の延長線上に位置しているため、第２係合突部よりも板部材同士を引きはがそうとする第１方向の力に強い。この係合突部の数を第２係合突部の数よりも増やすことで、係合部の強度を効率よく高めつつ、板部材同士を引きはがそうとする力を分散させることができる。 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. .

また、この発明に係る板部材の連結構造において、前記一方の縁部には、前記第１方向及び前記第２方向に交差する第３方向において、前記屈曲部及び前記第２屈曲部の両端部を閉塞する閉塞部が設けられている、ことを特徴とするものである。
この構成によれば、屈曲部及び第２屈曲部の第３方向の両端部を閉塞部によって閉塞することで、箱状にすることができ、屈曲部及び第２屈曲部における剛性をより高めることができる。 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.

また、この発明に係る椅子の荷重支持構造は、板状の外殻部材と、前記外殻部材に支持される板状の内殻部材と、前記内殻部材に支持される外装部材と、を備える椅子の荷重支持構造であって、前記外殻部材と前記内殻部材とを連結する板部材の連結構造として、先に記載の板部材の連結構造を有する、ことを特徴とするものである。
この構成によれば、外殻部材と内殻部材との係合部にかかる負荷を低減できる椅子の荷重支持構造が得られる。 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.

また、この発明に係る椅子は、先に記載の椅子の荷重支持構造を備える座及び背凭れの少なくともいずれか一方を有する、ことを特徴とする椅子ことを特徴とするものである。
この構成によれば、荷重支持構造の縁部における連結が解除され難くなるため、荷重支持構造の縁部の厚みを薄くした意匠性に優れる椅子が得られる。 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.

この発明によれば、係合部にかかる負荷を低減できる板部材の連結構造、椅子の荷重支持構造、及び椅子が得られる。   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.

本発明の実施形態における椅子１の斜視図である。It is a perspective view of the chair 1 in embodiment of this invention. 本発明の実施形態における椅子１の要部分解斜視図である。It is a principal part disassembled perspective view of the chair 1 in embodiment of this invention. 本発明の実施形態における荷重支持構造１０の平面図である。It is a top view of load supporting structure 10 in an embodiment of the present invention. 本発明の実施形態における外殻部材２０の斜視図である。It is a perspective view of the outer shell member 20 in the embodiment of the present invention. 本発明の実施形態における内殻部材３０の斜視図である。It is a perspective view of the inner shell member 30 in the embodiment of the present invention. 本発明の実施形態における内殻部材３０の底面側斜視図である。It is a bottom side perspective view of inner shell member 30 in an embodiment of the present invention. 図３における矢視Ａ−Ａ断面図である。It is arrow AA sectional drawing in FIG. 図３における矢視Ｂ−Ｂ断面図である。It is arrow BB sectional drawing in FIG. 図３における矢視Ｃ−Ｃ断面図である。It is CC sectional view taken on the line in FIG. 図３における矢視Ｄ−Ｄ断面図である。It is arrow DD sectional drawing in FIG. 図３における矢視Ｅ−Ｅ断面図である。It is arrow EE sectional drawing in FIG. 本発明の実施形態における第２連結部１０２における作用を説明するための概念図である。It is a conceptual diagram for demonstrating the effect | action in the 2nd connection part 102 in embodiment of this invention.

以下、本発明の実施形態について図面を参照して説明する。なお、以下の説明においては、椅子に正規姿勢で着座した人の正面が向く図中矢印ＦＲの指す向きを「前」と呼び、それと逆側の向きを「後」と呼ぶことがある。また、「上」，「下」と「左」，「右」については、椅子に正規姿勢で着座した人の上方の図中矢印ＵＰの指す向きを「上」、それと逆側の向きを「下」と呼び、椅子に正規姿勢で着座した人の左側の図中矢印ＬＨの指す向きを「左」、それと逆側の向きを「右」と呼ぶことがある。   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”.

図１は、本発明の実施形態における椅子１の斜視図である。
図１に示すように、本実施形態の椅子１は、脚部２と、支基３と、座４と、背凭れ５と、肘掛６と、を有する。 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.

脚部２は、キャスタ２ａ１を有する多肢脚２ａと、多肢脚２ａの中央部より起立する脚柱２ｂとを備えている。脚柱２ｂは、ガススプリングを内蔵しており、ロッド２ｂ１を昇降可能としている。このような脚部２は、キャスタ２ａ１を床に当接することによって椅子１を床面上において移動可能としており、脚柱２ｂによって座４や背凭れ５等を昇降可能に支持している。なお、不図示の操作部の操作によって脚柱２ｂのロッド２ｂ１が伸縮可能とされ、座４や背凭れ５等が昇降可能とされる。   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.

支基３は、脚柱２ｂのロッド２ｂ１の上端に固定されており、座４を支持すると共に、背凭れ５を支持している。座４は、椅子１の利用者である着座者を下方から支持する部位であり、支基３によって下方から支えられている。背凭れ５は、着座者を後方から支える部位であり、支基３に対して傾動可能に接続されている。肘掛６は、着座者の腕を下方から支える部位であり、座４を左右方向から挟むように背凭れ５に固定されて２つ設けられている。   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.

本実施形態の椅子１において、支基３は、ベース部３ａと、トーションユニット３ｂと、を有する。ベース部３ａは、脚柱２ｂのロッド２ｂ１の先端に固定される強度部材であり、前方に延在すると共に先端に座４が固定される２本のアーム３ａ１を有している。トーションユニット３ｂは、背凭れ５と接続され、背凭れ５をロッキング可能とする。   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.

図２は、本発明の実施形態における椅子１の要部分解斜視図である。
図２に示すように、本実施形態の座４は、外殻部材２０（第１板部材）と、内殻部材３０（第２板部材）と、外装部材４０と、を有する椅子の荷重支持構造１０（以下、単に荷重支持構造１０と称する）を備える。 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.

外殻部材２０は、支基３に近接する樹脂製の板状部材であって、座４の下層を形成するものである。内殻部材３０は、外殻部材２０に支持される樹脂製の板状部材であって、座４の上層を形成するものである。外装部材４０は、内殻部材３０に支持されるウレタン等のクッション材と、内殻部材３０に張設されてクッション材の上方側を覆うシート表皮材と、を有する。   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.

外殻部材２０と内殻部材３０とを比較すると、外殻部材２０の方が、内殻部材３０よりも剛性が高くなっている。内殻部材３０は、中央部が下方に凸となるように湾曲した板面３０ａを有し、弾性変形し易い構成となっている。外殻部材２０は、内殻部材３０の窪んだ部分（着座位置）に開口部２０ｂが形成された板面２０ａを有し、内殻部材３０を弾性変形させ易くする構成となっている。開口部２０ｂは、左右方向に延びる略長方形状である。この荷重支持構造１０は、以下説明する連結構造１００を備えている。   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.

図３は、本発明の実施形態における荷重支持構造１０の平面図である。図４は、本発明の実施形態における外殻部材２０の斜視図である。図５は、本発明の実施形態における内殻部材３０の斜視図である。図６は、本発明の実施形態における内殻部材３０の底面側斜視図である。図７は、図３における矢視Ａ−Ａ断面図である。図８は、図３における矢視Ｂ−Ｂ断面図である。図９は、図３における矢視Ｃ−Ｃ断面図である。図１０は、図３における矢視Ｄ−Ｄ断面図である。図１１は、図３における矢視Ｅ−Ｅ断面図である。   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.

図３に示すように、本実施形態の荷重支持構造１０は、外殻部材２０と内殻部材３０とを板面を合わせて連結する連結構造１００を有する。
連結構造１００は、前方で外殻部材２０と内殻部材３０とを連結する第１連結部１０１と、第１連結部１０１よりも後方で外殻部材２０と内殻部材３０とを連結する第２連結部１０２（板部材の連結構造）と、第２連結部１０２よりも後方で外殻部材２０と内殻部材３０とを連結する第３連結部１０３と、を有する。なお、外殻部材２０には、支基３の２本のアーム３ａ１と連結するための２本の連結溝２０ｃが形成されている（図２参照）。 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).

図３に示すように、第１連結部１０１は、前後方向において開口部２０ｂよりも前方に配置されている。第１連結部１０１は、左右方向において間隔をあけて複数（本実施形態では４つ）設けられている。第２連結部１０２は、開口部２０ｂの両側方に配置されている。第２連結部１０２は、開口部２０ｂを挟んで左右方向において対となって２つ設けられている。第３連結部１０３は、前後方向において開口部２０ｂよりも後方に配置されている。第３連結部１０３は、左右方向において間隔をあけて複数（本実施形態では３つ）設けられている。   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.

第１連結部１０１は、前後方向の相対移動によって、外殻部材２０と内殻部材３０とを係合させて、外殻部材２０と内殻部材３０とを左右方向に延びる仮想枢軸回りに回動自在に連結するものである。第２連結部１０２は、前後方向及び上下方向（板面２０ａ，３０ａと交差する第１方向）の少なくとも一方の相対移動によって、外殻部材２０と内殻部材３０とを係合させて、外殻部材２０と内殻部材３０との回動を規制するものである。第３連結部１０３は、上下方向の相対移動によって外殻部材２０と内殻部材３０とを係合させて、外殻部材２０と内殻部材３０との回動、及び、外殻部材２０と内殻部材３０との前後方向の相対移動を規制するものである。   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.

図４に示すように、外殻部材２０には、第１連結部１０１を構成する第１被係合部２２が設けられている。第１被係合部２２は、第１壁部２３と、第２壁部２４と、を有する。第１壁部２３は、上下方向に起立し、左右方向に延在する。第２壁部２４は、第１壁部２３よりも後方において上下方向に起立し、左右方向に延在する。この第２壁部２４は、上方に延びた後、前方に屈曲し、第１壁部２３の上方まで延在する。第１壁部２３と第２壁部２４との間には、前方に開口する開口部２２ａが形成される。   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.

外殻部材２０には、剛性を高める複数のリブ２１が形成されている。複数のリブ２１は、前後方向及び左右方向に格子状に延在し、外殻部材２０の角部においては斜めに延在している。第１壁部２３及び第２壁部２４の側方は、リブ２１に接続されている。これにより、第１被係合部２２が略箱状となり、第１被係合部２２の剛性を高めることができる。なお、左右方向両端部に配置された第１被係合部２２では、第１壁部２３が傾斜した板面２０ａに接続され、第２壁部２４が上下方向に起立し前後方向に延在する第３壁部２５に接続されている。   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.

図５に示すように、内殻部材３０には、複数のスリット３０ｂが形成されている。複数のスリット３０ｂは、内殻部材３０の縁部の全周に亘って間隔をあけて配置される。この複数のスリット３０ｂは、内殻部材３０の経年変形に追従できるようにするものである。また、複数のスリット３０ｂは、第１連結部１０１、第２連結部１０２、第３連結部１０３での係合にガタが生じることによる外殻部材２０と内殻部材３０との間の位置ずれを吸収できるようにするものでもある。なお、内殻部材３０には、後方寄りに、外装部材４０を固定するための固定部３１が設けられている。固定部３１は、左右方向において間隔をあけて複数（本実施形態では５つ）設けられている。   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.

図６に示すように、内殻部材３０の底面側には、第１連結部１０１を構成する第１係合部３２が設けられている。第１係合部３２は、上下方向に起立し、左右方向に延在する。この第１係合部３２は、図７に示すように、下方に延びた後、後方に屈曲する。第１係合部３２は、開口部２２ａを介して第１被係合部２２に係合する。具体的には、第１係合部３２のフック状の先端部３２ａが、第１被係合部２２の開口部２２ａに前後方向で挿入されることで、第１係合部３２と第１被係合部２２とが係合する。第１係合部３２と第１被係合部２２は、所定の遊びをもって係合しており、外殻部材２０と内殻部材３０との回動を許容する構成となっている。   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.

外殻部材２０には、図４に示すように、第３連結部１０３を構成する第３係合部２６が設けられている。第３係合部２６は、上下方向に起立するピン状である。第３係合部２６の上端部には、一対の第３係合爪部２６ａが設けられている。一対の第３係合爪部２６ａは、第３係合部２６の本体から側方に突出している。
また、内殻部材３０には、図６に示すように、第３連結部１０３を構成する第３被係合部３３が設けられている。第３被係合部３３は、上下方向に貫通する孔部である。 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.

第３係合部２６は、図８に示すように、第３被係合部３３に係合する。第３被係合部３３は、第３係合部２６が引っ掛かる一対の第３被係合爪部３４を有する。一対の第３被係合爪部３４は、上方に向かって徐々に近接するように傾斜している。第３係合部２６が、第３被係合部３３に上下方向で挿入されると、一対の第３係合爪部２６ａが一対の第３被係合爪部３４を離間する方向に弾性変形させる。第３係合爪部２６ａが第３被係合爪部３４を通過すると、一対の第３被係合爪部３４が元の位置に戻り、第３係合爪部２６ａの返しが第３被係合爪部３４に引っ掛かることで、第３係合部２６と第３被係合部３３とが係合する。   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.

第３係合部２６と第３被係合部３３が係合すると、上下方向の移動が制限され、外殻部材２０と内殻部材３０との回動が規制される。また、第３係合部２６と第３被係合部３３が係合すると、前後、左右の平面方向の移動が制限され、特に第１連結部１０１の係合状態を解除する前後方向における外殻部材２０と内殻部材３０との相対移動が規制される。なお、図４に示すように、左右方向両端部に配置された第３連結部１０３（第３係合部２６）は、左右方向中央部に配置された第３連結部１０３と異なり、平面視でハの字状となる斜めの向きで設けられている。これは、以下の理由による。   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.

第３係合部２６は、第３係合爪部２６ａのアンダーカット形状によって、樹脂成形する金型を上下方向と交差する方向にスライドさせる必要がある。外殻部材２０には、リブ２１が形成されており、リブ２１と干渉する部位には金型をスライドさせることができないため、リブ２１と干渉しない斜め方向に金型をスライドさせるためである。また、外殻部材２０の角部にあり、内殻部材３０の第３被係合部３３の経年変形の方向が一定でないため、前後方向及び左右方向のどちらの経年変形にも対応できるようにするためである。具体的に、第３係合部２６は、薄板状の脚部２６ｂを有し、内殻部材３０が前後方向及び左右方向のどちらかに変形した場合でも、脚部２６ｂの厚み方向に曲がるように弾性変形することができる。したがって、第３係合部２６において、前後方向及び左右方向のどちらか一方への変形のし易さを許容するために、他方への変形をし難くする必要がない。また、本実施形態の内殻部材３０は、中央部が下方に凸となるように湾曲した形状を有し、第３係合部２６への変形方向は一定になり難いため、第３係合部２６を斜めの向きにすることで、内殻部材３０の変形に有効に対応することができる。   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.

内殻部材３０には、図６に示すように、第２連結部１０２を構成する第２係合部３５（係合部）が設けられている。第２係合部３５は、内殻部材３０の縁部３０ｃに位置する。第２係合部３５は、第１係合突部３５ａ（係合突部）と、第２係合突部３５ｂと、を有する。第１係合突部３５ａは、内殻部材３０の平面方向外側を向くフック状の先端部を備える。一方、第２係合突部３５ｂは、内殻部材３０の平面方向内側を向くフック状の先端部を備える。   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.

第２係合部３５は、第１係合突部３５ａを、第２係合突部３５ｂより多く有しており、本実施形態では、第１係合突部３５ａを２つ有し、第２係合突部３５ｂを１つ有する。
前後方向において、第２係合突部３５ｂは、２つの第１係合突部３５ａの間に配置されている。すなわち、前後方向において、第１係合突部３５ａ、第２係合突部３５ｂ、第１係合突部３５ａの順に配置されている。このように第２係合部３５は、３つの爪が互い違いに配置されており、それぞれの爪が左右方向に弾性変形可能な構成となっている。 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.

また、外殻部材２０には、図４に示すように、第２連結部１０２を構成する第２被係合部２７（被係合部）が設けられている。第２被係合部２７は、左右方向で対向する一対の第２被係合爪部２８と、一対の第２被係合爪部２８と接続される壁部２９と、を有する。図９に示すように、一対の第２被係合爪部２８のうち外殻部材２０の平面方向内側に配置された一方には、第２係合突部３５ｂが係合する。また、図１０に示すように一対の第２被係合爪部２８のうち外殻部材２０の平面方向外側に配置された他方には、第１係合突部３５ａが係合する。第２係合部３５と第２被係合部２７が係合すると、上下方向の移動が制限され、外殻部材２０と内殻部材３０との回動が規制される。   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.

また、内殻部材３０には、図６に示すように、前後方向において第２係合部３５を挟んで一対のリブ３６が配置されている。リブ３６は、内殻部材３０の上下方向に起立し、左右方向に延在する。図１１に示すように、下方に延びたリブ３６の下端部は、外殻部材２０のリブ２１の上端部に接触する。リブ３６とリブ２１が接触することで、第２連結部１０２において、外殻部材２０と内殻部材３０の上下方向の位置決めが行われる。これにより、第２係合部３５が第２被係合部２７に対して、下方に行き過ぎてしまうことを防止することができる。   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.

また、図５に示すように、内殻部材３０の縁部３０ｃには、第１屈曲部３７（屈曲部）及び第２屈曲部３８が設けられている。第１屈曲部３７及び第２屈曲部３８の底面側には、第２係合部３５が配置されている（図６参照）。
第１屈曲部３７は、図１０に示すように、第１平面部３７ａと、第２平面部３７ｂとを含む。第１平面部３７ａは、上下方向に沿って延在する部位である。第２平面部３７ｂは、第１平面部３７ａの外殻部材２０に対して離間する側の端部３７ａ１から、左右方向（第１方向と交差する第２方向）に延在する部位である。第２平面部３７ｂには、第１係合突部３５ａを樹脂成形する金型を抜くための第１開口部３７ｂ１が複数形成されている（図６参照）。 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).

第１係合突部３５ａは、第１平面部３７ａの延長線上に位置している。第１係合突部３５ａの外向き側面３５ａ１は、第１平面部３７ａの外向き側面３７ａ３と一直線に連なる。また、第１係合突部３５ａの外向き側面３５ａ１と、第１平面部３７ａの外向き側面３７ａ３は、共に第１開口部３７ｂ１の一側面と連なり、同一の金型により同時に成形される。また、第１係合突部３５ａの内向き側面３５ａ２は、第１平面部３７ａの内向き側面３７ａ４よりも外側（紙面左側）に位置する。すなわち、第１平面部３７ａの左右方向の厚みは、第１係合突部３５ａの上下方向に延びる部位の左右方向の厚みより大きい。   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.

第２屈曲部３８は、図１０に示すように、第３平面部３８ａと、第４平面部３８ｂとを含む。第３平面部３８ａは、上下方向に沿って延在する部位である。第４平面部３８ｂは、第３平面部３８ａの外殻部材２０に対して離間する側の端部３８ａ１から、左右方向に延在し、第１平面部３７ａの外殻部材２０に対して近接する側の端部３７ａ２に連なる部位である。第４平面部３８ｂには、第２係合突部３５ｂを樹脂成形する金型を抜くための第２開口部３８ｂ１が形成されている（図６及び図９参照）。   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).

第２係合突部３５ｂは、図９に示すように、第４平面部３８ｂから外殻部材２０に対して突設されている。第２係合突部３５ｂの外向き側面３５ｂ１は、第１平面部３７ａの内向き側面３７ａ４の略延長線上に位置する。また、第２係合突部３５ｂの内向き側面３５ｂ２は、第１平面部３７ａの内向き側面３７ａ４よりも内側に位置する。第２係合突部３５ｂの内向き側面３５ｂ２は、第２開口部３８ｂ１の一側面と連なる。   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.

第２屈曲部３８は、図５に示すように、板面３０ａの着座者から荷重を受ける部位よりも上方に位置する。また、第１屈曲部３７は、第２屈曲部３８よりも上方に位置する。内殻部材３０の縁部３０ｃには、前後方向（第１方向及び第２方向と交差する第３方向）において、第１屈曲部３７及び第２屈曲部３８の両端部を閉塞する閉塞部３９が設けられている。閉塞部３９によって、第１屈曲部３７及び第２屈曲部３８が箱状となり、第２係合部３５が設けられている部位の剛性を高めることができる。   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.

上記構成の連結構造１００において、外殻部材２０と内殻部材３０とを係合させる場合、先ず、第１連結部１０１における係合作業を行う。具体的には、板面２０ａに沿う前後方向の相対移動によって外殻部材２０の第１被係合部２２と内殻部材３０の第１係合部３２とを係合させる。これにより、内殻部材３０を、前方を回動支点として外殻部材２０に回動自在に連結する。次に、内殻部材３０の後方を下方に回動させ、第２連結部１０２及び第３連結部１０３における係合作業を行う。具体的には、板面２０ａと交差する第２方向において、第２連結部１０２の第２係合部３５と第２被係合部２７とを係合させ、また、第３連結部１０３の第３係合部２６と第３被係合部３３とを係合させる。これにより、外殻部材２０と内殻部材３０とが連結された荷重支持構造１０が得られる。   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.

続いて、上記構成の荷重支持構造１０に対し、外殻部材２０と内殻部材３０とを引きはがそうとする力が加わったときの第２連結部１０２における作用について図１２を参照して説明する。   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.

図１２は、本発明の実施形態における第２連結部１０２における作用を説明するための概念図である。
図１２に示すように、荷重支持構造１０の左右方向の縁部は、意匠性を配慮して薄く見せている。しかしながら、これにより外装部材４０の内殻部材３０の縁部３０ｃに対する係合代が小さくなり、外装部材４０が係合している部分（内殻部材３０の縁部３０ｃの底面側）に着座者が手指をかけ易くなる。着座者によって手指がかけられた場合、その力が僅かでも、外殻部材２０と内殻部材３０とを引きはがそうとする上下方向の力が作用し、第２係合部３５に対して負荷がかかる。 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.

本実施形態の第２係合部３５は、第１屈曲部３７の第１平面部３７ａの延長線上に位置して、外殻部材２０に対して突設された第１係合突部３５ａを有する。第１屈曲部３７は、内殻部材３０の縁部３０ｃに設けられており、縁部３０ｃにおいて内殻部材３０の厚みを大きくすることなく剛性を高めることができる。また、第１屈曲部３７は、第２被係合部２７が設けられた外殻部材２０に対して離間する側の端部３７ａ１に第２平面部３７ｂが接続された第１平面部３７ａを有し、第１平面部３７ａは、外殻部材２０と内殻部材３０とを引きはがそうとする力が作用する上下方向に延在している。そして、第２係合部３５は、板部材の外殻部材２０に突設された第１係合突部３５ａを有し、この第１係合突部３５ａが第１平面部３７ａの延長線上に位置している。このため、第１係合突部３５ａが受ける上下方向の力は、力の向きを変えることなく剛性が高い第１屈曲部３７に作用する（図１２おける矢印参照）。このため、第１係合突部３５ａが受ける力を第１屈曲部３７に伝達して吸収でき、第２係合部３５にかかる負荷を低減できる。   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.

また、本実施形態において、内殻部材３０の縁部３０ｃには、上下方向に沿って延在する第３平面部３８ａ、及び、第３平面部３８ａの外殻部材２０に対して離間する側の端部３８ａ１から、左右方向に延在し、第１平面部３７ａの外殻部材２０に対して近接する側の端部３７ａ２に連なる第４平面部３８ｂを含む第２屈曲部３８が設けられている。この構成によれば、内殻部材３０の縁部３０ｃに、第２屈曲部３８を設け、縁部３０ｃにおいて階段状にして剛性をさらに高めることができる。また、第２屈曲部３８は、第１係合突部３５ａよりも板面３０ａの中央側に位置する。このため、板面３０ａの中央側に着座者から荷重が作用しても、第２屈曲部３８によって、その荷重に起因して第１係合突部３５ａにかかる負荷（曲げ荷重等）を低減できる。   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.

また、本実施形態では、図９に示すように、第２係合部３５は、第４平面部３８ｂから外殻部材２０に対して突設された第２係合突部３５ｂを有する。この構成によれば、外殻部材２０と内殻部材３０とを引きはがそうとする上下方向の力を第１係合突部３５ａと第２係合突部３５ｂとに分散させることができる。また、第２屈曲部３８も剛性が高く、第２係合突部３５ｂが突設された第４平面部３８ｂも上下方向の力に強い部位であるため、上下方向の力を第２屈曲部３８で吸収でき、第２係合部３５にかかる負荷を低減できる。   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.

また、本実施形態では、図６に示すように、第２係合突部３５ｂよりも第１係合突部３５ａが多く突設される。第１係合突部３５ａは、第１屈曲部３７の第１平面部３７ａの延長線上に位置しているため、第２係合突部３５ｂよりも外殻部材２０と内殻部材３０とを引きはがそうとする上下方向の力に強い。この第１係合突部３５ａの数を第２係合突部３５ｂの数よりも増やすことで、第２係合部３５の強度を効率よく高めつつ、上下方向の力を分散させることができる。   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. .

また、本実施形態では、図５に示すように、内殻部材３０の縁部３０ｃには、前後方向において、第１屈曲部３７及び第２屈曲部３８の両端部を閉塞する閉塞部３９が設けられている。この構成によれば、第１屈曲部３７及び第２屈曲部３８を箱状にすることができ、第１屈曲部３７及び第２屈曲部３８における剛性をより高めることができるため、上述した作用効果を高めることができる。   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.

このように、上述の本実施形態によれば、外殻部材２０と内殻部材３０とを連結する第２連結部１０２における第２係合部３５にかかる負荷を低減できる荷重支持構造１０が得られる。また、荷重支持構造１０の左右方向の縁部における連結が解除され難くなるため、荷重支持構造１０の左右方向の縁部の厚みを薄くした意匠性に優れる椅子１が得られる。   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.

以上、図面を参照しながら本発明の好適な実施形態について説明したが、本発明は上記実施形態に限定されるものではない。上述した実施形態において示した各構成部材の諸形状や組み合わせ等は一例であって、本発明の主旨から逸脱しない範囲において設計要求等に基づき種々変更可能である。   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.

例えば、上記実施形態では、第２被係合部２７を外殻部材２０に設け、第２係合部３５を内殻部材３０に設けた構成について説明したが、本発明はこの構成に限定されるものではなく、第２被係合部２７を内殻部材３０に設け、第２係合部３５を外殻部材２０に設ける構成であってもよい。
また、上記実施形態では、第３係合部２６を外殻部材２０に設け、第３被係合部３３を内殻部材３０に設けた構成について説明したが、本発明はこの構成に限定されるものではなく、第３係合部２６を内殻部材３０に設け、第３被係合部３３を外殻部材２０に設ける構成であってもよい。 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.

また、例えば、上記実施形態では、本発明に係る第２連結部１０２を荷重支持構造１０に適用した構成について説明したが、本発明はこの構成に限定されるものではなく、本発明に係る第２連結部１０２は、椅子１の荷重支持構造１０以外の広い分野に適用できる。   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.

また、例えば、上記実施形態では、第２連結部１０２を備える荷重支持構造１０を座４に適用した構成について説明したが、本発明はこの構成に限定されるものではなく、本発明に係る荷重支持構造１０を背凭れ５に適用してもよいし、座４と背凭れ５の両方に適用してもよい。   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 椅子
４ 座
５ 背凭れ
１０ 荷重支持構造（椅子の荷重支持構造）
２０ 外殻部材（第１板部材、他方）
２０ａ 板面
２７ 第２被係合部（被係合部）
３０ 内殻部材（第２板部材、一方）
３０ａ 板面
３０ｃ 縁部
３５ 第２係合部（係合部）
３５ａ 第１係合突部（係合突部）
３５ｂ 第２係合突部
３７ 第１屈曲部（屈曲部）
３７ａ 第１平面部
３７ａ１ 端部
３７ａ２ 端部
３７ｂ 第２平面部
３８ 第２屈曲部
３８ａ 第３平面部
３８ａ１ 端部
３８ｂ 第４平面部
３９ 閉塞部
１０２ 第２連結部（板部材の連結構造） 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)

板面を合わせて第１板部材と第２板部材とを連結する板部材の連結構造であって、
前記第１板部材及び前記第２板部材の一方に設けられた係合部と、
前記第１板部材及び前記第２板部材の他方に設けられ、前記板面と交差する第１方向で前記係合部と係合する被係合部と、を有し、
前記一方の縁部には、前記第１方向に沿って延在する第１平面部、及び、前記第１平面部の前記他方に対して離間する側の端部から、前記第１方向と交差する第２方向に延在する第２平面部を含む屈曲部が設けられ、
前記係合部は、前記第１平面部の延長線上に位置して、前記他方に対して突設された係合突部を有し、
前記一方の縁部には、さらに、前記第１方向に沿って延在する第３平面部、及び、前記第３平面部の前記他方に対して離間する側の端部から、前記第２方向に延在し、前記第１平面部の前記他方に対して近接する側の端部に連なる第４平面部を含む第２屈曲部が設けられている、ことを特徴とする板部材の連結構造。 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. . 前記係合部は、前記第４平面部から前記他方に対して突設された第２係合突部を有する、ことを特徴とする請求項１に記載の板部材の連結構造。 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. 前記係合部は、前記係合突部を、前記第２係合突部より多く有する、ことを特徴とする請求項２に記載の板部材の連結構造。 The plate member connection structure according to claim 2 , wherein the engagement portion has more engagement protrusions than the second engagement protrusions. 前記一方の縁部には、前記第１方向及び前記第２方向に交差する第３方向において、前記屈曲部及び前記第２屈曲部の両端部を閉塞する閉塞部が設けられている、ことを特徴とする請求項１〜３のいずれか一項に記載の板部材の連結構造。 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. 板状の外殻部材と、前記外殻部材に支持される板状の内殻部材と、前記内殻部材に支持される外装部材と、を備える椅子の荷重支持構造であって、
前記外殻部材と前記内殻部材とを連結する板部材の連結構造として、請求項１〜４のいずれか一項に記載の板部材の連結構造を有する、ことを特徴とする椅子の荷重支持構造。 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. 請求項５に記載の椅子の荷重支持構造を備える座及び背凭れの少なくともいずれか一方を有する、ことを特徴とする椅子。 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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