JP5343244B2 - Assembly structure of resin parts - Google Patents

Assembly structure of resin parts Download PDF

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JP5343244B2
JP5343244B2 JP2008085548A JP2008085548A JP5343244B2 JP 5343244 B2 JP5343244 B2 JP 5343244B2 JP 2008085548 A JP2008085548 A JP 2008085548A JP 2008085548 A JP2008085548 A JP 2008085548A JP 5343244 B2 JP5343244 B2 JP 5343244B2
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engagement
engaging
hole
pin
claw
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JP2009233242A (en
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智一 村上
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Kokuyo Co Ltd
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Kokuyo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembly structure of resin members which simply installs the resin members by engaging an engaging pin and an engaging hole, does not demand excessive pulling force in canceling an engagement state of the engaging pin and the engaging hole, prevents the engaging pin from being broken unexpectedly, and excellently cancels engagement between the engaging pin and the engaging hole when the assembly state of the resin members are canceled. <P>SOLUTION: In the assembly structure, an engaging nail forming area 95A provided with an engaging nail 952 and an engaging nail non-forming area 95B without the engaging nail 952 are provided around an axis by being divided into two at an end part of an engaging pin 95 high in rigidity integrally provided with a seat rear cover 9. A part of the seat rear cover 9 provided with the end part of the engaging pin 95 is inclined in the state the engaging pin 95 is inserted in an engaging hole 311, so that an engagement state of the engaging pin 95 and the engaging hole 311 is canceled by using a tilting means for allowing the engaging nail non-forming area 95B to tilt the engaging pin 95 itself to angle at which a periphery 311a of the engaging hole 311 is pressured. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、係合ピンと係合孔とを係合させて樹脂製部材同士を組付可能に構成した樹脂製部材同士の組付構造に関するものである。   The present invention relates to an assembling structure of resin members configured such that an engagement pin and an engagement hole are engaged so that the resin members can be assembled together.

従来より、樹脂製部材同士を組み付ける構造としては、一方の樹脂製部材に、先端に係合爪を有する弾性変形可能な係合ピンを設け、この係合ピンを、他方の樹脂製部材に設けた係合孔に係合ピン自体の弾性変形を利用して弾性係合させることによって、樹脂製部材同士を組み付ける態様が挙げられる。   Conventionally, as a structure for assembling resin members, one resin member is provided with an elastically deformable engagement pin having an engagement claw at the tip, and this engagement pin is provided on the other resin member. A mode in which the resin members are assembled to each other by using the elastic deformation of the engaging pin itself to the engaging hole is mentioned.

具体的な実施態様としては、二枚のシェル構造体、例えば椅子の背シェルと背カバーとを相互に組み付けて構成する場合において、背カバーの適宜箇所に、筒状体をスリットによって軸回りに3分割し且つ先端部に係合爪を一体に有する係合ピンを複数設け、これら各係合ピンを、背シェルに設けた弾性変形不能な又は弾性変形し難い筒状の係合孔にそれぞれ押圧して挿入し、その過程で係合ピンが軸径を小さくする方向へ一時的に弾性退避し、係合孔の反挿入側開口縁を通過し終えた時点又は係合孔内に設けた係合突起を通過し終えた時点で係合ピンが弾性復帰することにより、係合爪を係合孔の反挿入側開口縁又は係合突起に係合させて、背カバーと背シェルとを一体的に組み付けるようにしている(例えば特許文献1参照)。
特許第3874375号公報(図4等参照)
As a specific embodiment, in the case where two shell structures, for example, a back shell and a back cover of a chair are assembled to each other, a cylindrical body is provided around the axis by a slit at an appropriate position of the back cover. A plurality of engagement pins that are divided into three and have engagement claws integrally at the tip are provided, and these engagement pins are respectively provided in cylindrical engagement holes provided on the back shell that are not elastically deformable or difficult to elastically deform. It was inserted by pressing, and in the process, the engagement pin temporarily retracted in the direction of decreasing the shaft diameter, and it was provided when it passed through the opening edge on the opposite side of the engagement hole or in the engagement hole When the engagement pin is elastically restored after passing through the engagement protrusion, the engagement claw is engaged with the opening edge of the engagement hole on the opposite side or the engagement protrusion, and the back cover and the back shell are engaged. They are assembled integrally (see, for example, Patent Document 1).
Japanese Patent No. 3874375 (see FIG. 4 etc.)

ところで、従来のものは、樹脂製部材同士を一旦組み付けた後において、部品交換やメンテナンス等、その組付状態を解除しなければならない場合には、樹脂製部材同士を相互に引き離す力、具体的には係合爪と係合孔との係合力を超える引っ張り力によって、各係合ピンの係合爪をなかば強引に弾性変形させて、係合ピンを係合孔から抜き取るようにしていた。   By the way, in the conventional case, after assembling the resin members once, when the assembled state has to be released such as parts replacement or maintenance, the force to separate the resin members from each other, In this case, the engaging claw of each engaging pin is forcibly elastically deformed by a pulling force exceeding the engaging force between the engaging claw and the engaging hole, and the engaging pin is extracted from the engaging hole.

しかしながら、各係合ピンの係合爪を強引に弾性変形させる態様であるため、引き離し作業時に過度の引き抜き力が要求され、引き離し作業をスムーズに行うことができないという不具合に加え、係合爪をスムーズに弾性変形させることができない場合や、急な引っ張り力が係合爪に作用した場合には、係合爪、ひいては係合ピン自体が破損するおそれがあり、破損した場合にはこのような係合爪を一体に設けた樹脂製部材ごと交換しなければならず、コスト面及び作業効率で劣るものとなる。   However, since the engaging claw of each engaging pin is forcibly elastically deformed, excessive pulling force is required at the time of the separation work, and in addition to the problem that the separation work cannot be performed smoothly, If it cannot be elastically deformed smoothly, or if a sudden pulling force is applied to the engaging claw, the engaging claw and thus the engaging pin itself may be damaged. It is necessary to replace the resin member integrally provided with the engaging claws, which is inferior in terms of cost and work efficiency.

本発明は、このような課題に着目してなされたものであって、主たる目的は、樹脂製部材同士を係合ピンと係合孔とを相互に係合させることによって簡単に組み付けることができるとともに、樹脂製部材同士の組付状態を解除する場合に、係合ピンと係合孔との係合状態を解除するにあたって過度の引き抜き力が要求されず、係合ピンが不意に破損することを防止し、係合ピンと係合孔との係合解除をスムーズに行うことが可能な樹脂製部材同士の組付構造を提供することにある。   The present invention has been made paying attention to such a problem. The main object of the present invention is to easily assemble resin members by engaging engagement pins and engagement holes with each other. When releasing the assembled state of the resin members, excessive pulling force is not required to release the engagement state between the engagement pin and the engagement hole, and the engagement pin is prevented from being unexpectedly damaged. Then, it is providing the assembly | attachment structure of the resin members which can perform engagement cancellation | release with an engagement pin and an engagement hole smoothly.

すなわち、本発明の樹脂製部材同士の組付構造は、第1の樹脂製部材であるアウターシェルの外縁部又は外縁部近傍部位に一体に設けた係合ピンを、第2の樹脂製部材であるインナーシェルに設けた係合孔に、当該係合孔の周縁の弾性を利用して係合させることによって、前記樹脂製部材同士を組付可能に構成したものであり、前記係合ピンが、円柱状又は円筒状をなす軸部を主体としてなり、当該軸部の先端部をその軸回りに、係合爪を設けた係合爪形成領域と係合爪を設けていない係合爪非形成領域とに二分割したものであるとともに前記係合孔の周縁と比較して弾性変形しにくいものであり、前記係合孔が、前記係合ピンを外嵌する円形状をなし、且つ周縁にスリット又は切欠からなる弾性変形惹起部を設けたものであり、当該係合ピンを前記係合孔に挿入して係合させた状態で、前記アウターシェルの外縁部を前記インナーシェルから離間する方向に反らす操作力を加えることにより当該係合ピン自体を前記係合爪非形成領域又は軸部のうち係合爪非形成領域よりも基端側の部位が前記係合孔の周縁に当たって当該周縁を押圧し得る角度まで傾けることが可能な傾動手段を利用して、前記係合ピンと前記係合孔との係合状態を解除するように構成したことを特徴とする。 That is, assembly structure of the resin members to each other of the present invention, the engagement pin provided integrally with the outer edge or the outer edge vicinity portion of the outer shell, the first resin member, the second resin member The resin member is configured to be assembled with an engagement hole provided in a certain inner shell by utilizing the elasticity of the peripheral edge of the engagement hole. The main part is a columnar or cylindrical shaft part, and the front end part of the shaft part is formed around the axis, and the engagement claw forming area provided with the engagement claw and the engagement claw non-engagement not provided with the engagement claw It is divided into a formation region and is less elastically deformed than the peripheral edge of the engagement hole, and the engagement hole has a circular shape for externally fitting the engagement pin, and the peripheral edge Is provided with an elastic deformation inducing portion consisting of a slit or a notch. In a state in which engagement is inserted into the engagement hole, the engagement claw unformed the engagement pin itself by applying an operating force to deflect the outer edge of the outer shell in a direction away from the inner shell Using the tilting means capable of inclining to an angle at which the portion of the region or shaft portion closer to the base end side than the engagement claw non-formation region hits the peripheral edge of the engagement hole and can press the peripheral edge, It is configured to release the engagement state between the pin and the engagement hole.

このようなものであれば、係合ピンを係合孔に挿入して係合させた状態において、係合ピンを反挿入方向へ引っ張る力が作用した場合であっても係合ピンの軸部のうち係合爪形成領域が係合孔に係わり合い、係合ピンが係合孔から抜け外れることを防止できるとともに、係合ピンの軸部の先端部を係合爪形成領域と係合爪非形成領域とに軸回りに二分割しているため、係合ピンと係合孔とを相互に係合させた状態において、剛性の高い係合ピンを傾動させて係合孔の周縁を係合爪非形成領域又は軸部のうち係合爪非形成領域よりも基端側の部位が押圧することによって係合孔が弾性変形惹起部の作用により開口寸法を拡開する方向に弾性変形し、係合爪非形成領域を係合孔から抜き外すことができ、さらに係合ピンを傾動させる又は反挿入方向へ引っ張る力が作用した場合に、係合爪非形成領域に続いて係合爪形成領域も係合孔から抜け外れ、係合ピン全体を係合孔から抜き外すことができる。
また、前記アウターシェルの外縁部又は外縁部近傍部位に前記係合ピンを一体に設け、係合ピンを係合孔に係合させた状態においてアウターシェルの外縁部又は外縁部近傍部位を把持してインナーシェルから引き離す方向に反らせて湾曲変形させることにより係合ピンを確実に傾け前記係合ピンと前記係合孔との係合状態を解除するように構成しているので、樹脂製部材同士の分解作業をスムーズ且つ容易に行うことができる。
If it is such, even if it is a case where the force which pulls an engagement pin to an anti-insertion direction acts in the state where the engagement pin was inserted in the engagement hole and engaged, the shaft part of the engagement pin The engagement claw forming region is engaged with the engagement hole, and the engagement pin can be prevented from coming off from the engagement hole, and the distal end portion of the shaft portion of the engagement pin is connected to the engagement claw formation region and the engagement claw. Since it is divided into two parts around the axis into the non-formation area, the engagement pin and the engagement hole are engaged with each other, and the highly rigid engagement pin is tilted to engage the periphery of the engagement hole The engagement hole is elastically deformed in the direction of expanding the opening dimension by the action of the elastic deformation inducing portion when the portion closer to the base end side than the engagement claw non-formation region of the claw non-formation region or the shaft portion is pressed, The engagement claw non-formation area can be removed from the engagement hole, and the engagement pin can be tilted or counter-inserted When pulling the force acts, the engaging claw forming region subsequent to the engagement claws formed area also deviate exit the engaging hole can be removed disconnect the entire engaging pin from the engaging hole.
Further, the engagement pin is integrally provided at the outer edge portion of the outer shell or a portion near the outer edge portion, and the outer edge portion of the outer shell or the portion near the outer edge portion is gripped in a state where the engagement pin is engaged with the engagement hole. Since the engagement pin is reliably tilted by being bent and deformed in the direction of pulling away from the inner shell, the engagement state between the engagement pin and the engagement hole is released. The disassembly work can be performed smoothly and easily.

したがって、本発明によれば、樹脂製部材同士を一旦組み付けた後において、部品交換やメンテナンス等、その組付状態を解除しなければならない場合に、係合爪と係合孔との係合力を超える過度の引っ張り力、引き抜き力が要求されず、樹脂製部材同士の分解作業をスムーズに行うことができる。しかも、係合ピンに急な引っ張り力が作用することを回避し、係合爪、ひいては係合ピン自体の破損を防止することができる。   Therefore, according to the present invention, after the resin members are once assembled together, the engagement force between the engagement claw and the engagement hole can be reduced when the assembled state has to be released such as parts replacement or maintenance. Excessive pulling force and pulling force exceeding are not required, and the disassembly work of the resin members can be performed smoothly. In addition, it is possible to avoid a sudden pulling force from acting on the engaging pin, and to prevent the engaging claw and thus the engaging pin itself from being damaged.

特に、前記傾動手段が、前記アウターシェル自体を傾けることによって、前記係合ピン自体を、前記係合爪非形成領域又は軸部のうち係合爪非形成領域よりも基端側の部位が前記係合孔の周縁に当たって当該周縁を押圧し且つ係合爪非形成領域が係合孔から抜け外れる角度まで傾けるものであれば、アウターシェルに専用の傾動機構を設ける必要がなく、構造の簡素化を図ることができる。 In particular, the tilting means tilts the outer shell itself, so that the engagement pin itself is positioned at a position proximal to the engagement claw non-formation region of the engagement claw non-formation region or the shaft portion. As long as it hits the periphery of the engagement hole and presses the periphery and tilts to an angle at which the non-engagement claw forming region is removed from the engagement hole, there is no need to provide a dedicated tilt mechanism on the outer shell , and the structure is simplified. Can be achieved.

係合ピンと係合孔とを相互に係合させた状態において係合ピンを反挿入方向へ引っ張る力が作用した場合であっても、係合ピンが係合孔の弾性変形惹起手段から不意に抜け外れることを防止するためには、前記係合ピンを前記係合孔に係合させた状態で、前記係合爪の端部、換言すれば係合爪形成領域と前記係合爪非形成領域との境界部分にある段部と、前記係合孔の前記弾性変形惹起部とが、同一直線上に並ばないように設定すればよい。   Even when a force pulling the engagement pin in the anti-insertion direction is applied in a state where the engagement pin and the engagement hole are engaged with each other, the engagement pin is unexpectedly moved from the elastic deformation inducing means of the engagement hole. In order to prevent disengagement, in the state where the engagement pin is engaged with the engagement hole, the end of the engagement claw, in other words, the engagement claw formation region and the engagement claw non-formation What is necessary is just to set so that the step part in the boundary part with an area | region and the said elastic deformation induction part of the said engagement hole may not line up on the same straight line.

この場合、アウターシェルのうち係合ピンの基端部を設けた部位を傾ける際に要する座裏カバーを反らせる操作を比較的軽い力で行うことができるようにするには、前記アウターシェルのコーナー部又はコーナー部近傍部位に前記係合ピンを一体に設ければよい。 In this case, in order to be able to perform the operation of warping the seat back cover required when tilting the portion of the outer shell where the base end portion of the engagement pin is tilted, a corner of the outer shell is used. The engagement pin may be integrally provided at a portion near the corner or the corner.

また、複数の係合ピンをアウターシェルに一体成型する場合に用いる金型の設計上の要求を満たすためには、前記アウターシェルが各コーナー部又は各コーナー部近傍部位にそれぞれ前記係合ピンを一体に設けたものであり、左右巾方向に対向する係合ピンを、前記係合爪形成領域同士が内向きに対向するように設けることが好ましい。このような構造により、各係合ピンの係合爪非形成領域がアウターシェルの外縁側に設けられることとなり、アウターシェルインナーシェルから引き離す方向に反らす操作力を付与した場合に、相対的に外縁側に位置する係合爪非形成領域又は軸部のうち係合爪非形成領域よりも基端側の部位を係合孔の周縁に当てて押圧させる動作を効率良く行うことができるという効果も得られる。 Further, in order to meet the requirements of the mold design to be used in the case of integrally molding a plurality of engaging pins to the outer shell, the outer shell of each of the engagement pins in each corner portion or each corner near the site It is preferable that the engagement pins that are provided integrally and face in the left-right width direction are provided so that the engagement claw forming regions face each other inward. Such a structure will be engaging claw formed area of each engaging pin is provided on the outer edge of the outer shell, when applying the operating force divert the direction of separating the outer shell from the inner shell, relatively The effect of being able to efficiently perform an operation of pressing a portion of the engagement claw non-formation region or shaft portion located on the outer edge side with a portion closer to the base end side than the engagement claw non-formation region against the periphery of the engagement hole. Can also be obtained.

前記アウターシェルが前記係合ピンを複数備えたものであり、前記インナーシェルが前記係合ピンと同数の前記係合孔を備えたものであれば、アウターシェルインナーシェルとの間に複数の係合箇所を確保することができ、アウターシェルインナーシェルとの安定した組付状態を維持できる。 If the outer shell is provided with a plurality of the engagement pins, and the inner shell is provided with the same number of the engagement holes as the engagement pins, a plurality of engagements are provided between the outer shell and the inner shell. A joint point can be secured and a stable assembly state of the outer shell and the inner shell can be maintained.

以上説明したように本発明によれば、剛性の高い係合ピンを弾性変形可能な係合孔に挿入して係合させることによって樹脂製部材同士を簡単に組み付けることができるとともに、一旦組み付けた樹脂製部材同士を分解させる場合に、係合ピンと係合孔との係合状態を解除するにあたって過度の引き抜き力が要求されず、係合ピンが不意に破損することを防止し、係合ピンと係合孔との係合解除を好適に行うことが可能な樹脂製部材同士の組付構造を提供することができる。   As described above, according to the present invention, resin members can be easily assembled together by inserting a highly rigid engaging pin into an elastically deformable engagement hole, and once assembled. When disassembling the resin members, an excessive pulling force is not required to release the engagement state between the engagement pin and the engagement hole, and the engagement pin is prevented from being unexpectedly damaged. It is possible to provide an assembly structure of resin members capable of suitably releasing the engagement with the engagement hole.

以下、本発明の一実施形態を、図面を参照して説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

本実施形態では、本発明に係る樹脂製部材同士の組付構造を、図1に示す椅子1における座裏カバー9(本発明の「第1の樹脂製部材」に相当)と座シェル31(本発明の「第2の樹脂製部材」に相当)との組付構造に適用している。なお、座裏カバー9及び座シェル31を相互に組付可能なシェル構造体として捉えた場合、座裏カバー9がアウターシェルとなり、座シェル31がインナーシェルとなる。   In this embodiment, the assembly structure of the resin members according to the present invention has a seat back cover 9 (corresponding to the “first resin member” of the present invention) and the seat shell 31 ( This is applied to the assembly structure corresponding to the “second resin member” of the present invention. In addition, when the seat back cover 9 and the seat shell 31 are regarded as a shell structure that can be assembled to each other, the seat back cover 9 serves as an outer shell, and the seat shell 31 serves as an inner shell.

椅子1は、図1、図2(図2は図1に示す椅子1の左右幅方向中央断面を一部省略して示す図である)に示すように、脚体2と、座3と、座3の下方に配した支持基部4と、支持基部4の後部側に下端部を枢支させた背支桿5と、背支桿5に取り付けられる背凭れ6とを備えたものである。本実施形態の椅子1は、背支桿5の後傾動作に伴って背凭れ6が後傾する背チルト機能を有する一方で、座3が背凭れ6の後傾動作に連動するシンクロチルト機能は有さないものである。   As shown in FIGS. 1 and 2 (FIG. 2 is a diagram in which the central cross section of the chair 1 shown in FIG. 1 is partially omitted), the chair 1 has a leg 2, a seat 3, A support base 4 disposed below the seat 3, a back support rod 5 having a lower end pivoted on the rear side of the support base 4, and a backrest 6 attached to the back support rod 5 are provided. The chair 1 of the present embodiment has a back tilt function in which the backrest 6 tilts backward in accordance with the backward tilting motion of the back support rod 5, while the synchro tilt function in which the seat 3 interlocks with the backward tilting motion of the backrest 6. Is not something.

脚体2は、キャスタを有する複数の脚羽根21と、単一の脚支柱22とを備え、筒状の脚支柱22の内部に、座3を昇降させるための座昇降機構たるガスシリンダ(図示省略)を配している。すなわち、脚支柱22は、ガスシリンダを被覆するガスシリンダカバー部材として機能している。   The leg body 2 includes a plurality of leg blades 21 having casters and a single leg strut 22, and a gas cylinder (illustrated) as a seat lifting mechanism for lifting the seat 3 inside the cylindrical leg strut 22. (Omitted). That is, the leg support 22 functions as a gas cylinder cover member that covers the gas cylinder.

脚支柱22は、図2及び図2の要部拡大図である図3に示すように、テレスコープ状をなす上方側筒状体221及び下方側筒状体222と、上方側筒状体221の上端部に嵌合可能なキャップ部材223とを備えたものである。ここで、上方側筒状体221とキャップ部材223との嵌合構造について説明する。   As shown in FIG. 3 which is an enlarged view of a main part of FIGS. 2 and 2, the leg column 22 includes an upper cylindrical body 221 and a lower cylindrical body 222 that form a telescope shape, and an upper cylindrical body 221. And a cap member 223 that can be fitted to the upper end portion. Here, a fitting structure between the upper cylindrical body 221 and the cap member 223 will be described.

上方側筒状体221は、下方から上方に向かって径を漸次大きくして外周面全体をテーパ状に設定したものであり、上端部に、他の領域よりも薄肉な段部221aを形成している。   The upper cylindrical body 221 is configured such that the diameter is gradually increased from the lower side to the upper side and the entire outer peripheral surface is set in a tapered shape, and a step portion 221a thinner than other regions is formed at the upper end portion. ing.

一方、キャップ部材223は、概略円盤状をなし、中央部にガスシリンダの上端部の挿入を許容し且つ挿入されたガスシリンダを保持し得る保持孔223aを有し、上方側筒状体221の段部221aに嵌合可能な嵌合部223bを外縁部に有するものである。嵌合部223bは、径方向に対向する内側対向壁223ba及び外側対向壁223bbと、これら対向壁223ba、222bbの上端同士を接続する接続部223bcとを有し下方にのみ開口する凹溝状のものである。内側対向壁223baと外側対向壁223bbとの内法寸法を段部221aの厚み寸法と略同一又は若干大きく設定している。   On the other hand, the cap member 223 has a substantially disc shape, has a holding hole 223a that allows the upper end of the gas cylinder to be inserted and can hold the inserted gas cylinder at the center, and The outer edge portion has a fitting portion 223b that can be fitted to the stepped portion 221a. The fitting portion 223b has a concave groove shape that has an inner facing wall 223ba and an outer facing wall 223bb that are opposed to each other in the radial direction, and a connection portion 223bc that connects the upper ends of these facing walls 223ba and 222bb, and opens only downward. Is. The inner dimensions of the inner facing wall 223ba and the outer facing wall 223bb are set to be substantially the same as or slightly larger than the thickness dimension of the step portion 221a.

このような上方側筒状体221とキャップ部材223との取り付けは、図3に示すように、キャップ部材223の嵌合部223bを上方側筒状体221の段部221aに嵌合させることによって行う。嵌合状態(図3(b)参照)において、嵌合部223bの内側対向壁223baと外側対向壁223bbとによって段部221aを内側と外側とから挟み込む態様となる。さらに、本実施形態では、嵌合部223bの径寸法、具体的には外側対向壁223bbの内径寸法を、段部221aの外径寸法よりも若干小さく設定しているため、キャップ部材223の嵌合部223bをテーパ状になっている段部221aに圧入することにより、段部221aが嵌合部223bの内側対向壁223baと外側対向壁223bbとの間で押圧された状態で挟み込まれる態様となり、段部221aと嵌合部223bとのより強固な嵌合状態を長期に亘って維持できるように構成している。なお、段部221aの外向面又は内向面の少なくとも何れか一方に外方又は内方に突出する凸部を周方向に連続して設け、外側対向壁223bbの内向面又は内側対向壁223baの外向面の少なくとも何れか一方に前記凸部に係合可能な凹部を周方向に連続して設け、嵌合部223bを段部221aに嵌合させ際に、対面する凸部と凹部とが係合するように構成してもよい。もちろん、凸部と凹部との関係が逆である態様、つまり、段部221aに凹部を設け、嵌合部223bに凸部を設けた態様であっても構わない。   Such attachment of the upper cylindrical body 221 and the cap member 223 is performed by fitting the fitting portion 223b of the cap member 223 to the step portion 221a of the upper cylindrical body 221 as shown in FIG. Do. In the fitted state (see FIG. 3B), the stepped portion 221a is sandwiched between the inner side and the outer side by the inner facing wall 223ba and the outer facing wall 223bb of the fitting portion 223b. Furthermore, in this embodiment, the diameter of the fitting portion 223b, specifically, the inner diameter of the outer facing wall 223bb is set slightly smaller than the outer diameter of the step portion 221a. By pressing the joint portion 223b into the tapered step portion 221a, the step portion 221a is sandwiched while being pressed between the inner facing wall 223ba and the outer facing wall 223bb of the fitting portion 223b. The stepped portion 221a and the fitting portion 223b are configured to be able to maintain a stronger fitting state over a long period of time. In addition, the convex part which protrudes outward or inward continuously is provided in at least one of the outward surface or the inward surface of the step portion 221a in the circumferential direction, and the inward surface of the outer facing wall 223bb or the outward direction of the inner facing wall 223ba. A concave portion that can be engaged with the convex portion is continuously provided in at least one of the surfaces in the circumferential direction, and the convex portion and the concave portion that face each other are engaged when the fitting portion 223b is fitted to the step portion 221a. You may comprise. Of course, a mode in which the relationship between the convex portion and the concave portion is reversed, that is, a mode in which the concave portion is provided in the stepped portion 221a and the convex portion is provided in the fitting portion 223b may be employed.

なお、ガスシリンダは、周知のものであるため詳細な説明は省略する。ガスシリンダを脚支柱22の内部に配し、その上端部近傍をキャップ部材223の保持孔223aに挿入して保持させた状態で、後述する操作レバー7の基端部によって押圧され突没動作可能な頭部がキャップ部材223よりも上方に位置付けられる。   Since the gas cylinder is a well-known one, a detailed description is omitted. The gas cylinder is arranged inside the leg column 22 and the vicinity of the upper end thereof is inserted into the holding hole 223a of the cap member 223 and is held by being pressed by the base end portion of the operation lever 7 described later. A simple head is positioned above the cap member 223.

座3は、図1及び図2に示すように、シェル構造体である座シェル31と、座シェル31の上方に配される座クッション材32と、座クッション材32を被覆し得る座面カバー33とを備えたものである。座シェル31の詳細については後述する。   As shown in FIGS. 1 and 2, the seat 3 includes a seat shell 31 that is a shell structure, a seat cushion material 32 disposed above the seat shell 31, and a seat surface cover that can cover the seat cushion material 32. 33. Details of the seat shell 31 will be described later.

支持基部4は、図2、図4、及び図5(図5は、支持基部4に背支桿5及び操作レバー7を枢支させた状態の背面図である)に示すように、座シェル31の下向面のうち左右巾方向中央領域に位置付けられる支持基部本体41と、支持基部本体41の左右両側方に取り付けた肘受け部42と、支持基部本体41の下向面に取り付けた脚支柱受け部43とを備えたものである。   The support base 4 is a seat shell as shown in FIGS. 2, 4 and 5 (FIG. 5 is a rear view of the support base 4 with the back support rod 5 and the operating lever 7 pivoted). 31, a support base body 41 positioned in the center region in the left-right width direction, an elbow support portion 42 attached to both left and right sides of the support base body 41, and a leg attached to the lower surface of the support base body 41. A support post 43 is provided.

支持基部本体41は、前後方向(長手方向)中間部よりも後方側に寄った位置を境に、前方に向かって緩い角度で漸次上方に傾斜するベース部411と、後方に向かってベース部411よりも急な角度で漸次上方に傾斜し、且つ背支桿5の後傾に伴う反力を受ける反力受け部412とを一体に備えたスチール製の一体品である(図2参照)。なお、背支桿5の後傾に伴って背支桿5を起立姿勢に傾動させる傾動力(反力)を発生させる反力機構Xは、図示しないスプリングバネを利用したものであり、座3の後部側下方に配される操作ノブX1(図1参照)を操作することによって、背支桿5の後傾に伴って背支桿5を起立姿勢に傾動させる傾動力(反力)の程度を調節できる周知のものを適用しており、詳細な説明は省略する。支持基部本体41は、左右両側縁又は左右両側縁近傍において前後方向に沿って延伸するリブ41aを備えている。本実施形態では、正面視略山折り状のリブ41aを適用している。ベース部411から反力受け部412に亘って連続して設けたリブ41aにより、支持基部本体41は剛性の高いものとなる。ベース部411は、リブ41aよりも外側に、座シェル31に取り付ける際に利用する座シェル取付用孔を形成した座シェル取付部411aを有し、この座シェル取付部411aの一部に肘受け部42を取り付けるための肘受け取付部411bを形成している(図4参照)。座シェル取付部411aは、ベース部411と同一角度で前方に向かって漸次上方に傾斜するものである一方で、肘受け取付部411bは、前後方向に水平に延びるものである。このように、肘受け取付部411bを水平なものに設定することにより、左右何れの肘受け取付部411bにも同一の肘受け部42を取り付けることができるようにしている。このような構成により、肘受け取付部411bがベース部411と同一角度で前方に向かって漸次上方に傾斜するものであれば生じる不具合、つまり、肘受け取付部411bの傾斜角度に対応させなければならないために左右の肘受け取付部411bの共通化を図れないという不具合を解消している。   The support base body 41 includes a base portion 411 that gradually tilts upward at a gentle angle toward the front and a base portion 411 toward the rear, with a position closer to the rear side than the middle portion in the front-rear direction (longitudinal direction). It is a steel integrated product integrally provided with a reaction force receiving portion 412 that gradually inclines upward at a steeper angle and receives a reaction force associated with the backward inclination of the back support rod 5 (see FIG. 2). Note that the reaction force mechanism X that generates a tilting force (reaction force) that tilts the back support rod 5 to a standing posture with the back tilt of the back support rod 5 uses a spring spring (not shown), and the seat 3 The degree of tilting power (reaction force) that causes the back support bar 5 to tilt to the upright position as the back support bar 5 is tilted backward by operating the operation knob X1 (see FIG. 1) disposed below the rear side. The well-known thing which can adjust can be applied, and detailed explanation is omitted. The support base body 41 includes ribs 41 a extending along the front-rear direction in the left and right side edges or in the vicinity of the left and right side edges. In the present embodiment, ribs 41a that are substantially mountain-folded when viewed from the front are applied. The support base body 41 has high rigidity due to the ribs 41 a provided continuously from the base portion 411 to the reaction force receiving portion 412. The base portion 411 has a seat shell mounting portion 411a in which a seat shell mounting hole used for mounting to the seat shell 31 is formed outside the rib 41a, and an elbow support is provided on a part of the seat shell mounting portion 411a. An elbow support mounting portion 411b for mounting the portion 42 is formed (see FIG. 4). The seat shell mounting portion 411a is inclined upward and gradually forward at the same angle as the base portion 411, while the elbow support mounting portion 411b extends horizontally in the front-rear direction. In this way, by setting the elbow support mounting portion 411b to be horizontal, the same elbow support portion 42 can be attached to either the left or right elbow support mounting portion 411b. With such a configuration, if the elbow support attaching part 411b is inclined to the front and gradually upward at the same angle as the base part 411, that is, it is necessary to correspond to the inclination angle of the elbow support attaching part 411b. This eliminates the problem that the left and right elbow support mounting portions 411b cannot be shared.

肘受け部42は、肘受け取付部411bの下面及び脚支柱受け部43の側面に例えば溶接等により固着したスチール製のものである。肘受け部42は、外側方に向かって漸次迫り上がった姿勢で保持されている。   The elbow support part 42 is made of steel that is fixed to the lower surface of the elbow support attachment part 411b and the side surface of the leg support part 43 by welding, for example. The elbow support 42 is held in a posture that gradually rises outward.

脚支柱受け部43は、前後方向及び上方に開口した概略上向きコ字状をなし、ベース部411の後部側及び反力受け部412の前部側に亘る領域に例えば溶接等により固着したスチール製のものである(図2、図5参照)。脚支柱受け部43のうち、ベース部411の後部側に位置付けられる部位には、ガスシリンダの上端部及び突没動作可能な頭部が挿通可能な筒状部431を設けている。この筒状部431は、ベース部411を貫通するものであり、ガスシリンダの頭部が筒状部431の開口に臨む位置に位置付けられるようにしている。そして、ガスシリンダを操作するための操作レバー78の基端部も、筒状部431の開口に臨む位置に位置付けられ、この操作レバー7によりガスシリンダの頭部を押圧できるようにしている。   The leg strut receiving portion 43 has a generally upward U-shape that opens in the front-rear direction and upward, and is made of steel that is fixed to a region extending from the rear side of the base portion 411 and the front side of the reaction force receiving portion 412 by, for example, welding. (See FIGS. 2 and 5). A cylindrical portion 431 through which the upper end portion of the gas cylinder and the head that can project and retract can be inserted in a portion of the leg strut receiving portion 43 that is positioned on the rear side of the base portion 411. The cylindrical portion 431 penetrates the base portion 411 and is positioned at a position where the head of the gas cylinder faces the opening of the cylindrical portion 431. The base end portion of the operation lever 78 for operating the gas cylinder is also positioned at a position facing the opening of the tubular portion 431 so that the operation lever 7 can press the head of the gas cylinder.

操作レバー7は、基端部近傍を支持基部4に前後方向の水平軸回りに回動可能に枢支させたレバー本体71と、レバー本体71の先端部に取り付けられた合成樹脂製の取手72とを備えたものである。なお、操作レバー7の動作の説明にあたって用いる「前後方向の水平軸回りに回動」とは、「前後方向に延びる水平軸を回転中心として高さ方向に回動」という意味である。   The operation lever 7 includes a lever main body 71 pivotally supported by the support base 4 in the vicinity of the base end portion so as to be rotatable around a horizontal axis in the front-rear direction, and a handle 72 made of a synthetic resin attached to the distal end portion of the lever main body 71. It is equipped with. Note that “rotation about the horizontal axis in the front-rear direction” used in the description of the operation of the operation lever 7 means “rotation in the height direction about the horizontal axis extending in the front-rear direction”.

レバー本体71は、金属製の棒状部材であり、支持基部4の下方に配される第1直線状部711と、支持基部4の上方に配されガスシリンダの頭部を上方から押圧し得る第2直線状部712と、第1直線状部711と第2直線状部712との間に設けられ、且つ支持基部4に形成したレバー挿通孔(具体的には、肘受け部42の内方端部に形成した第1レバー挿通孔42a、及び支持基部本体41の一方のリブ41aに形成した第2レバー挿通孔41aa)に通される屈曲部713とを連続して有するものである。   The lever main body 71 is a metal rod-shaped member, and a first linear portion 711 disposed below the support base 4 and a first cylinder portion 711 disposed above the support base 4 and capable of pressing the head of the gas cylinder from above. Lever insertion hole provided between the two linear portions 712, the first linear portion 711, and the second linear portion 712 and formed in the support base 4 (specifically, the inner side of the elbow receiving portion 42) The first lever insertion hole 42a formed at the end and the bent portion 713 passed through the second lever insertion hole 41aa formed in one rib 41a of the support base body 41 are continuously provided.

取手72は、先端部を扁平状にした合成樹脂製のものであり、ビス等によってレバー本体71の先端部に取り付けられている。この取手72を上下方向に移動させる操作によって、操作レバー7は、レバー本体71の基端部(第2直線状部712の基端部)がガスシリンダの頭部を押圧する押圧位置と、ガスシリンダの頭部を押圧しない非押圧位置と間で前後方向の水平軸回りに回動する。   The handle 72 is made of a synthetic resin having a flat tip portion, and is attached to the tip portion of the lever main body 71 with a screw or the like. By the operation of moving the handle 72 in the vertical direction, the operation lever 7 has a pressing position where the base end portion of the lever body 71 (the base end portion of the second linear portion 712) presses the head of the gas cylinder, and the gas It rotates around the horizontal axis in the front-rear direction between the non-pressing position where the head of the cylinder is not pressed.

背支桿5は、図2、図4及び図5等に示すように、左右一対の背凭れフレーム体51と、背凭れフレーム体51同士の間に設けられ反力機構Xのスプリングバネを受けるバネ受け部52とを一体的に備えたものである。   As shown in FIGS. 2, 4, and 5, the back support rod 5 is provided between a pair of left and right backrest frame bodies 51 and the backrest frame bodies 51 and receives a spring spring of the reaction force mechanism X. The spring receiving portion 52 is integrally provided.

左右一対の背凭れフレーム体51は、その前部が前記ベース部411の下方に位置するように配され、座3の後端部より後方で上方に湾曲し、上方に延伸する部位に、背凭れ6を取り付けるための背凭れ取付部53を一体的に設けたものである。なお、背凭れ6は、背シェルと、背シェルの前方に配される背クッション材(共に図示省略)と、背クッション材を被覆し得る背凭れ面カバー61と、背シェルの背面に取り付け可能な背カバー62とを備えたものである(図1参照)。   The pair of left and right backrest frame bodies 51 are arranged so that the front portions thereof are located below the base portion 411, are curved upward and rearward from the rear end portion of the seat 3, and are extended to the portions extending upward. A backrest attaching portion 53 for attaching the turn 6 is integrally provided. The backrest 6 can be attached to the back shell, the back cushion material (not shown) arranged in front of the back shell, the backrest surface cover 61 that can cover the back cushion material, and the back of the back shell. The back cover 62 is provided (see FIG. 1).

各背凭れフレーム体51の下端部(基端部)は、脚支柱受け部43のうち反力受け部412の前部側に位置付けられる部位を両側方から挟む位置に配され、左右巾方向の水平軸である背支桿回転軸5xによって支持基部4に枢支されている(図2、図5参照)。背支桿回転軸5xは、左右一対の背凭れフレーム体51に連通する単一の軸であってもよいが、本実施形態では、各背凭れフレーム体51毎にそれぞれ個別に設けた態様としている。勿論、これら一対の軸同士は座の左右巾方向に同一直線上に位置付けられている。また、支持基部4に枢支させた各背凭れフレーム体51のうち、支持基部本体41の下方に配される下端部側領域は、図15に示すように、支持基部本体41に設けた左右一対のリブ41aの直下又は略直下に位置付けられる。   A lower end portion (base end portion) of each backrest frame body 51 is arranged at a position sandwiching a portion of the leg strut receiving portion 43 that is positioned on the front side of the reaction force receiving portion 412 from both sides, in the lateral width direction. It is pivotally supported on the support base 4 by a back support rod rotating shaft 5x which is a horizontal axis (see FIGS. 2 and 5). The back support shaft rotating shaft 5x may be a single shaft that communicates with the pair of left and right backrest frame bodies 51. However, in the present embodiment, as an aspect provided individually for each backrest frame body 51, Yes. Of course, the pair of shafts are positioned on the same straight line in the lateral width direction of the seat. Further, in each backrest frame body 51 pivotally supported by the support base 4, the lower end side region disposed below the support base main body 41 is provided on the left and right sides provided in the support base main body 41 as shown in FIG. 15. It is positioned directly below or approximately directly below the pair of ribs 41a.

バネ受け部52は、図2及び図6(図6は図2の要部拡大であって背支桿5が後傾した状態を一部省略して示す図である)に示すように、背凭れフレーム体51のうち、前記枢支点(背支桿回転軸5x)よりも後方であって且つ上方に曲がる部位よりも前方の部位に配され、概略平板状のスチール材を、側面視略下向きコ字状に折り曲げ加工したものである。バネ受け部52の前端部には、背凭れフレーム体51の下向面よりも若干下方に位置し、且つ背支桿5が支持基部4に対して後傾した際に支持基部4(具体的には脚支柱受け部43の後端部)と接触し得る当たり部521を設けている。当たり部521は、バネ受け部52の前向面522の下端から前方に向かって延びる舌片状をなし、上方に突出する上向き凸部521aを設けている(図6参照、なお、図6では上向き凸部521aの一部にパターンを付している)。本実施形態では、一対の上向き凸部521aを左右に離間させて設けている。   As shown in FIGS. 2 and 6 (FIG. 6 is an enlarged view of the main part of FIG. 2 and a part of the back support bar 5 is shown in a partially omitted state), as shown in FIGS. Of the drooping frame body 51, the steel plate is disposed at a position behind the pivot point (back support shaft rotating shaft 5x) and ahead of the bent portion, and the substantially flat steel material faces substantially downward. It is bent into a U shape. At the front end portion of the spring receiving portion 52, the support base portion 4 (specifically, when the back support rod 5 is tilted rearward with respect to the support base portion 4, located slightly below the downward surface of the backrest frame body 51. Is provided with a contact portion 521 that can come into contact with the rear end portion of the leg strut receiving portion 43. The contact portion 521 has a tongue-like shape extending forward from the lower end of the forward facing surface 522 of the spring receiving portion 52, and is provided with an upward convex portion 521a protruding upward (see FIG. 6, FIG. 6). A pattern is given to a part of the upward convex portion 521a). In the present embodiment, the pair of upward convex portions 521a are provided so as to be separated from each other on the left and right.

背支桿5の下端部近傍部位のうち外部に露出する部位は背支桿カバー8によって被覆されている。   Of the portion near the lower end of the back support rod 5, the portion exposed to the outside is covered with a back support rod cover 8.

背支桿カバー8は、図2、図4〜図7に示すように、背支桿5を挿通させるための背支桿用挿通孔81aを有する概略筒状のカバー本体81と、背支桿5の前記当たり部521を被覆し且つ背支桿5の後傾時に当たり部521よりも優先して支持基部4に接触する緩衝用カバー82とを一体に備えたものである。この背支桿カバー8は、例えば合成樹脂素材からなる一体成型品である。なお、図4では、本来装着されるべき背支桿カバー8を取り外した背支桿5を支持基部4に枢支させた状態であり、背支桿カバー自体を単体の斜視図として同図中に示している。   As shown in FIGS. 2 and 4 to 7, the back support rod cover 8 includes a substantially cylindrical cover main body 81 having a back support rod insertion hole 81 a for inserting the back support rod 5, and a back support rod. 5 and a buffer cover 82 that contacts the support base 4 in preference to the contact portion 521 when the back support 5 is tilted backward. The back support rod cover 8 is an integrally molded product made of, for example, a synthetic resin material. 4 shows a state in which the back support rod 5 from which the back support rod cover 8 to be originally attached is removed is pivotally supported by the support base 4, and the back support rod cover itself is shown as a single perspective view. It shows.

カバー本体81の背支桿用挿通孔81aは、左右巾方向に巾広な略矩形状をなし、背支桿5の前記一対の背凭れフレーム体51を若干あそびのある状態で収容可能な開口寸法に設定されている。カバー本体81の底面には、背支桿5に取り付けた状態で背支桿5のバネ受け部52に連通する筒状の鍔部81bを設けている。   The back support rod insertion hole 81a of the cover body 81 has a substantially rectangular shape that is wide in the left-right width direction, and is an opening that can accommodate the pair of backrest frame bodies 51 of the back support rod 5 with some play. Set to dimensions. On the bottom surface of the cover main body 81, a cylindrical collar portion 81 b that communicates with the spring receiving portion 52 of the back support rod 5 while being attached to the back support rod 5 is provided.

緩衝用カバー82は、カバー本体81の上面の前端部に連続するものであり、カバー本体81に対して、背支桿用挿通孔81aの開口方向から見て背支桿用挿通孔81aから外れた位置である非装着位置(82A)(図7(c)参照)と、背支桿用挿通孔81aの開口方向から見て背支桿用挿通孔81a内に位置し当たり部521に装着可能な装着位置(82B)(図7(b)参照)との間で回動可能なものである。なお、本実施形態では、カバー本体81と緩衝用カバー82との接続部位を、薄肉に設定する又は一部切除することによりヒンジ部として機能させている。緩衝用カバー82の左右巾寸法を背凭れフレーム体51同士の内法よりも小さく設定している(図5参照)。   The buffer cover 82 is continuous with the front end portion of the upper surface of the cover body 81, and is disengaged from the back support rod insertion hole 81a when viewed from the opening direction of the back support rod insertion hole 81a. The non-mounting position (82A) (see FIG. 7 (c)), which is an open position, and the back support rod insertion hole 81a as viewed from the opening direction of the back support rod insertion hole 81a, can be attached to the contact portion 521. It can be rotated between the appropriate mounting position (82B) (see FIG. 7B). In the present embodiment, the connecting portion between the cover main body 81 and the buffer cover 82 is made thin or partially cut away so as to function as a hinge portion. The left and right width dimensions of the buffer cover 82 are set smaller than the inner method between the backrest frame bodies 51 (see FIG. 5).

このような背支桿カバー8を背支桿5に取り付けるには、先ず、緩衝用カバー82を非装着位置(82A)に位置付けた状態で、背支桿用挿通孔81aに、背支桿5の下端部近傍を挿入し、非装着位置(82A)から装着位置(82B)に回動させた緩衝用カバー82が背支桿5のバネ受け部52の当たり部521又は前向面522に当たる位置まで緩衝用カバー82を移動させ、緩衝用カバー82の先端部を当たり部521に前方から押圧して装着する。緩衝用カバー82の先端部は、当たり部521を上下方向から挟み込む形状をなし、さらに、この緩衝用カバー82の先端部に、当たり部521に設けた前記上向き凸部521aに嵌め込むことが可能な嵌合孔82aを設けている(図4、図7参照)。嵌合孔82aは、概略半球状をなす上向き凸部521aが圧入可能なものである。そして、緩衝用カバー82の先端部を当たり部521に装着することにより、背支桿5と背支桿カバー8との相対取付位置が位置決めされ、背支桿カバー8内で背支桿5がぐらつくことを防止し、嵌合孔82aに上向き凸部521aを圧入して嵌め込むことにより、当たり部521に対する緩衝用カバー82の嵌合状態がより良好なものとなる。なお、本実施形態では、緩衝用カバー82が自重で装着位置(82B)、又は装着位置(82B)と非装着位置(82A)との間の位置に位置付けられるようにしている。背支桿カバー8を背支桿5に装着した状態において、背支桿カバー8は支持基部4に対する背支桿5の枢支点5Xよりも後方に位置付けられる。   In order to attach the back support rod cover 8 to the back support rod 5, first, the back support rod 5 is inserted into the back support rod insertion hole 81a in a state where the buffer cover 82 is positioned at the non-mounting position (82A). The buffer cover 82 inserted in the vicinity of the lower end portion of the back and rotated from the non-mounting position (82A) to the mounting position (82B) hits the abutting portion 521 or the front surface 522 of the spring receiving portion 52 of the back support rod 5. The buffer cover 82 is moved until the tip end portion of the buffer cover 82 is pressed against the contact portion 521 from the front side. The front end portion of the buffer cover 82 has a shape that sandwiches the contact portion 521 from above and below, and can be fitted to the upward convex portion 521a provided in the contact portion 521 at the front end portion of the buffer cover 82. A fitting hole 82a is provided (see FIGS. 4 and 7). The fitting hole 82a can be press-fitted with an upward convex portion 521a having a substantially hemispherical shape. Then, by attaching the tip of the buffer cover 82 to the contact portion 521, the relative mounting position of the back support rod 5 and the back support rod cover 8 is positioned, and the back support rod 5 is positioned within the back support rod cover 8. By preventing the wobbling and press-fitting the upward convex portion 521a into the fitting hole 82a, the fitting state of the buffer cover 82 with respect to the contact portion 521 becomes better. In the present embodiment, the buffer cover 82 is positioned by its own weight at the mounting position (82B) or between the mounting position (82B) and the non-mounting position (82A). In a state where the back support rod cover 8 is attached to the back support rod 5, the back support rod cover 8 is positioned behind the pivot point 5 </ b> X of the back support rod 5 with respect to the support base 4.

背支桿カバー8を下端部近傍に装着した状態の背支桿5を支持基部4に枢着し、この支持基部4を座シェル31の裏面側にビス等の固定手段を利用して固定する。本実施形態では、さらに支持基部4に操作レバー7を枢支させた状態で、座裏カバー9を座シェル31の下面側から取り付けられるようにしている。   The back support rod 5 with the back support rod cover 8 attached in the vicinity of the lower end portion is pivotally attached to the support base portion 4, and the support base portion 4 is fixed to the back side of the seat shell 31 using a fixing means such as a screw. . In the present embodiment, the seat back cover 9 is attached from the lower surface side of the seat shell 31 with the operation lever 7 pivotally supported by the support base 4.

座シェル31は、図2、図8及び図9(図8(a)は座シェル31の底面図であり、同図(b)は(a)のP領域拡大図であり、図9は図8(a)のa−a線断面である)等に示すように、概略薄板状をなす合成樹脂製のものであり、中央領域を外縁部よりも窪ませた3次元形状を有する。本実施形態の座シェル31は一体成型品である。座シェル31の上面に座クッション材32を載置可能に構成し、下面に、支持基部4を取付可能に構成している。また、座シェル31の軽量化及び剛性を高めるという観点から、適宜箇所(図示例では中央部領域)に厚み方向に貫通する一又は複数の貫通孔を設けるとともに、下面部に前後方向、左右幅方向に延びる複数のリブを設けている。そして、この座シェル31の各コーナー部近傍部位にそれぞれ下方に開口した概略円筒状の係合孔311を設けている。各係合孔311は、座シェル31の厚み方向、換言すれば座3の高さ方向に貫通するものであり、周縁311aに高さ方向に沿って延びる本発明の弾性変形惹起部たるスリット311bを形成している(図8(b)参照)。本実施形態では、円筒状をなす周縁311aを二等分する箇所に対向する一対のスリット311bを形成している。特に、本実施形態の係合孔311は、周縁311aのうち座3の左右幅方向に対向する箇所にスリット311bを形成している。このようなスリット311bを有する係合孔311は、弾性変形していない通常開口状態(図9(a)参照)と、スリット311bの拡開動作を通じて弾性変形し、開口寸法が通常開口状態における開口寸法よりも大きくなる拡開状態(図9(b)参照)との間で弾性変形する。また、各係合孔311は、周縁311aのうち開口縁に、開口側(下方)から奥方(上方)に向かって漸次内法を小さくするテーパ状の係合突起311cを周方向に沿って設けている。座シェル31には、操作レバー7の基端部との干渉を回避するための操作レバー干渉回避用孔312を形成している。   2, 8 and 9 (FIG. 8 (a) is a bottom view of the seat shell 31, FIG. 8 (b) is an enlarged view of the P region of FIG. 9 (a), and FIG. 8 (a) is a cross-sectional view taken along line aa), and is made of a synthetic resin having a substantially thin plate shape, and has a three-dimensional shape in which a central region is recessed from an outer edge portion. The seat shell 31 of the present embodiment is an integrally molded product. The seat cushion material 32 is configured to be mountable on the upper surface of the seat shell 31, and the support base 4 is configured to be attachable to the lower surface. In addition, from the viewpoint of reducing the weight and rigidity of the seat shell 31, one or a plurality of through holes penetrating in the thickness direction are provided at appropriate places (in the central portion region in the illustrated example), and the front and rear direction and the left and right widths are provided on the lower surface portion. A plurality of ribs extending in the direction are provided. Further, a substantially cylindrical engagement hole 311 opened downward is provided in the vicinity of each corner of the seat shell 31. Each engagement hole 311 penetrates in the thickness direction of the seat shell 31, in other words, in the height direction of the seat 3, and the slit 311 b which is an elastic deformation inducing portion of the present invention extending along the height direction to the peripheral edge 311 a. (See FIG. 8B). In the present embodiment, a pair of slits 311b are formed so as to face a portion that bisects a cylindrical peripheral edge 311a. In particular, the engagement hole 311 of the present embodiment forms a slit 311b at a portion of the peripheral edge 311a that faces the seat 3 in the left-right width direction. The engagement hole 311 having such a slit 311b is elastically deformed through the normal opening state (see FIG. 9A) that is not elastically deformed and the opening operation of the slit 311b, and the opening size is an opening in the normal opening state. It is elastically deformed between the expanded state (see FIG. 9B) that is larger than the dimension. In addition, each engagement hole 311 is provided with a tapered engagement protrusion 311c along the circumferential direction that gradually decreases the inner method from the opening side (downward) to the back (upward) at the opening edge of the peripheral edge 311a. ing. The seat shell 31 is formed with an operation lever interference avoidance hole 312 for avoiding interference with the base end portion of the operation lever 7.

座裏カバー9は、図2、図10、図11(図10(a)は座裏カバー9の平面図であり、同図(b)は(a)のQ領域拡大図である)に示すように、概略薄板状をなす合成樹脂製のものであり、座シェル31、支持基部4、及び背支桿5の下端部側領域を下方から被覆し得るものである。本実施形態の座裏カバー9は一体成型品である。座裏カバー9の中央部に脚体2の脚支柱22の上端部が差し込み可能な開口部91を設けている。開口部91は、脚体2内に配されたガスシリンダを取り付けるためのガスシリンダ用孔911と、ガスシリンダ用孔911に連続し且つ操作レバー7との干渉を回避するための操作レバー用孔912とからなる。ガスシリンダ用孔911は、略円形状をなし、操作レバー用孔912は、ガスシリンダ用孔911の一方の側方からに左右幅方向に延びる長孔である。このような開口部91を設けた領域及びその周辺領域を他の領域よりも下方に窪ませ、座シェル31に取り付けた支持基部4のうち主として脚支柱受け部43を収容し得る支持基部収容部92として機能するように設定している。座裏カバー9の後端側の左右幅方向中央領域であって支持基部収容部92に連続する部位に、背支桿カバー8との干渉を避けるための切欠部93を設けている。また、座裏カバー9の両側縁近傍領域には、支持基部4の肘受け部42の底面に当接又は近接し、肘Hを取り付けるためのビスが挿通可能なビス挿通孔を形成した肘受け部裏当て部94を設けている。そして、この座裏カバー9の各コーナー部近傍部位にそれぞれ係合ピン95を一体に設けている。   The seat back cover 9 is shown in FIGS. 2, 10, and 11 (FIG. 10 (a) is a plan view of the seat back cover 9, and FIG. 10 (b) is an enlarged view of the Q region in FIG. 10 (a)). Thus, it is a thing made from the synthetic resin which makes a substantially thin plate shape, and can coat | cover the lower end part side area | region of the seat shell 31, the support base 4, and the back support rod 5 from the downward direction. The seat back cover 9 of the present embodiment is an integrally molded product. An opening 91 through which the upper end of the leg support 22 of the leg 2 can be inserted is provided at the center of the seat back cover 9. The opening 91 includes a gas cylinder hole 911 for attaching a gas cylinder disposed in the leg 2, and an operation lever hole for continuing to the gas cylinder hole 911 and avoiding interference with the operation lever 7. 912. The gas cylinder hole 911 has a substantially circular shape, and the operation lever hole 912 is a long hole extending in the left-right width direction from one side of the gas cylinder hole 911. The support base accommodating portion that can mainly accommodate the leg strut receiving portion 43 of the support base 4 attached to the seat shell 31 by recessing the region where the opening 91 is provided and the peripheral region below the other region. It is set to function as 92. A cutout portion 93 for avoiding interference with the back support rod cover 8 is provided in a central region in the left-right width direction on the rear end side of the seat back cover 9 and continuing to the support base housing portion 92. Further, in the vicinity of both side edges of the seat back cover 9, an elbow support in which a screw insertion hole is formed which is in contact with or close to the bottom surface of the elbow receiving portion 42 of the support base 4 and through which a screw for attaching the elbow H can be inserted. A part backing part 94 is provided. And the engagement pin 95 is integrally provided in each corner part vicinity site | part of this seat back cover 9, respectively.

各係合ピン95は、図10(b)に示すように、円筒状をなす軸部951を主体としてなり、この軸部951の先端部を、側方に突出する係合爪952を設けた係合爪形成領域95Aと、係合爪952を設けていない係合爪非形成領域95Bとに軸回りに二分割したものである。係合爪952は、先端に向かって漸次径を小さくしたテーパ状をなす。軸部951の外径寸法を、前記通常開口状態にある係合孔311の開口縁の開口内法よりも僅かに小さく設定するとともに、係合爪形成領域95Aにおける最大外径寸法を、通常開口状態にある係合孔311の周縁311aのうち係合突起311cよりも上方の部位における開口内法と略同一に設定している。本実施形態では、軸部951の先端部を、係合爪形成領域95Aと、係合爪非形成領域95Bとに略均等に分割し、係合爪形成領域95Aと係合爪非形成領域95Bとの境界部分である段部95C、換言すれば係合爪952の両端部が、平面視略同一直線上に位置付けられるようにしている。特に本実施形態では、係合爪形成領域95Aと係合爪非形成領域95Bとの境界部分である段部95Cを、座3の前後方向に対向する箇所に設定している。より具体的には、座裏カバー9の四隅近傍にそれぞれ設けた各係合ピン95は、左右幅方向に対向する係合ピン95との関係において、係合爪形成領域95A同士が内向きに対向するように設定している。つまり、各係合ピン95は、軸部951の先端部のうち、座裏カバー9の左右幅方向中心寄りである内向き側の半周領域を係合爪形成領域95Aに設定し、外向き側(座裏カバー9の外縁側)の半周領域を係合爪非形成領域95Bに設定している。各係合ピン95の基端部は、座裏カバー9の上向面から上方に向かって突出させた剛性の高い取付基部96に連続して設けられている。取付基部96は、中空状のボックス部961と、ボックス部961の内部に設けた一又は複数のリブ962とからなり、各取付基部96の上面を全て平行な平滑面にすることによって、各係合ピン95の突出方向が相互に平行となり、且つ各係合ピン95の基端位置が同一となる。座裏カバー9のうち、取付基部96を設けた箇所近傍を反らすように湾曲変形させた場合、取付基部96が座裏カバー9の湾曲具合に応じて傾き、これに伴って係合ピン95が取付基部96の傾きと同一角度に傾く。   As shown in FIG. 10B, each engagement pin 95 is mainly composed of a cylindrical shaft portion 951, and an engagement claw 952 that protrudes laterally from the tip portion of the shaft portion 951 is provided. The engaging claw forming region 95A and the engaging claw non-forming region 95B not provided with the engaging claw 952 are divided into two around the axis. The engaging claw 952 has a tapered shape with a gradually decreasing diameter toward the tip. The outer diameter dimension of the shaft portion 951 is set slightly smaller than the inner diameter method of the opening edge of the engaging hole 311 in the normal opening state, and the maximum outer diameter dimension in the engaging claw forming region 95A is set to the normal opening. It is set to be substantially the same as the in-opening method in the region above the engagement protrusion 311c in the peripheral edge 311a of the engagement hole 311 in the state. In the present embodiment, the tip end portion of the shaft portion 951 is substantially equally divided into an engaging claw forming region 95A and an engaging claw non-forming region 95B, and the engaging claw forming region 95A and the engaging claw non-forming region 95B are divided. 95C, in other words, both end portions of the engaging claw 952 are positioned on substantially the same straight line in plan view. In particular, in the present embodiment, the step portion 95C, which is a boundary portion between the engaging claw forming region 95A and the engaging claw non-forming region 95B, is set at a location facing the seat 3 in the front-rear direction. More specifically, each engagement pin 95 provided in the vicinity of the four corners of the seat back cover 9 has an engagement claw forming region 95A facing inward in relation to the engagement pin 95 facing in the left-right width direction. They are set to face each other. That is, each engagement pin 95 sets an inward half-circumferential region near the center in the left-right width direction of the seat back cover 9 in the front end portion of the shaft portion 951 as the engagement claw forming region 95A, and the outward side A half-circumferential region (outer edge side of the seat back cover 9) is set as an engagement claw non-formation region 95B. The base end portion of each engagement pin 95 is provided continuously with a highly rigid mounting base portion 96 that protrudes upward from the upward surface of the seat back cover 9. The mounting base 96 includes a hollow box portion 961 and one or a plurality of ribs 962 provided inside the box portion 961, and the upper surfaces of the mounting base portions 96 are all parallel and smooth surfaces. The protruding directions of the mating pins 95 are parallel to each other, and the base end positions of the engaging pins 95 are the same. When the seat back cover 9 is bent and deformed so that the vicinity of the portion where the mounting base 96 is provided is curved, the mounting base 96 is tilted according to the bending state of the seat back cover 9, and the engagement pin 95 is accordingly moved. It is inclined at the same angle as the inclination of the mounting base 96.

次にこのような座シェル31と座裏カバー9とを相互に組み付ける手順及び作用について説明する。   Next, the procedure and operation for assembling the seat shell 31 and the seat back cover 9 together will be described.

座シェル31と座裏カバー9とを組み付ける前に、予め背支桿カバー8を取り付けた背支桿5の下端部を支持基部4の後端部近傍部位に枢支させるとともに、支持基部4に操作レバー7の基端部を枢支させておき、このような支持基部4を座シェル31の下面に固定しておく。   Before assembling the seat shell 31 and the seat back cover 9, the lower end portion of the back support rod 5 to which the back support rod cover 8 is attached in advance is pivotally supported in the vicinity of the rear end portion of the support base portion 4. The base end portion of the operation lever 7 is pivotally supported, and such a support base portion 4 is fixed to the lower surface of the seat shell 31.

そして、図12及び図13に示すように、座シェル31の下面を上方に向けた状態(倒置状態)で、座裏カバー9を、前記開口部91に操作レバー7を通して座シェル31の下面側を被覆し得る位置に位置付け、座シェル31の各係合孔311にそれぞれ係合ピン95を押圧して挿入する。座裏カバー9の開口部91に操作レバー7を通す際に、操作レバー7を、先端部(取手72)が座シェル31から離間する方向に回動させておくと、操作レバー7の先端部側領域と座シェル31及び支持基部4との離間寸法を大きく稼ぐことができ、開口部91に操作レバー7を通す作業をより簡単に行うことができる。なお、図12に示す操作レバー7は、先端部(取手72)が座シェル31から離間する方向に回動させた状態ではなく、図5に示す姿勢と同じ姿勢である。   Then, as shown in FIGS. 12 and 13, with the lower surface of the seat shell 31 facing upward (inverted state), the seat back cover 9 is passed through the opening 91 and the operation lever 7 to the lower surface side of the seat shell 31. The engagement pins 95 are pressed into the respective engagement holes 311 of the seat shell 31 and inserted. When the operation lever 7 is passed through the opening 91 of the seat back cover 9, if the operation lever 7 is rotated in a direction in which the distal end portion (the handle 72) is separated from the seat shell 31, the distal end portion of the operation lever 7. The distance between the side region, the seat shell 31 and the support base 4 can be greatly increased, and the operation of passing the operation lever 7 through the opening 91 can be performed more easily. The operating lever 7 shown in FIG. 12 is not in a state where the tip end (the handle 72) is rotated in a direction away from the seat shell 31, but is in the same posture as that shown in FIG.

係合孔311に対する係合ピン95の挿入動作に伴って、係合爪形成領域95Aが周縁311aの開口側端部に設けた内向きテーパ状の前記係合突起311cを押圧し、この押圧力によりスリット311bが押し広げられ係合孔311が開口寸法を拡開する方向に弾性変形した拡開状態となり、さらに係合ピン95を挿入することによって、係合爪形成領域95Aが係合孔311の係合突起311cを乗り越え、この時点で係合孔311が弾性復帰して通常開口状態となり、図14、図15及び図16(a)に示すように、係合ピン95の係合爪形成領域95Aが係合孔311の係合突起311cに係合する。なお、図14は、座裏カバー9を座シェル31に組み付けた状態を図10のb―b線断面に相当する断面で示すものであり、図15は、座裏カバー9を座シェル31に組み付けた状態を図10のc−c線断面に相当する断面で示すものであり、図16(a)は図15の一部拡大図である。本実施形態では、各係合孔311に設けた一対のスリット311bが向き合う方向を座3の左右巾方向と略平行に設定しているのに対して、係合爪952の端部、つまり係合爪形成領域95Aと前記係合爪非形成領域95Bとの境界部分である一対の段部95Cが向き合う方向を座3の前後方向と略平行に設定しているため、係合ピン95を係合孔311に係合させた係合状態において、係合爪952の段部95Cと、係合孔311のスリット311bとが、同一直線上に並ばず、略直交する関係となる。その結果、係合状態において係合ピン95を反挿入方向へ真っ直ぐに引っ張る力が作用した場合であっても係合爪形成領域95Aが係合孔311の係合突起311cに引っ掛かり、係合ピン95が係合孔311から抜け外れることを防止している。   As the engaging pin 95 is inserted into the engaging hole 311, the engaging claw forming region 95 </ b> A presses the inwardly tapered engaging protrusion 311 c provided at the opening end of the peripheral edge 311 a, and this pressing force As a result, the slit 311b is pushed and expanded so that the engagement hole 311 is elastically deformed in the direction of expanding the opening dimension, and the engagement claw forming region 95A is inserted into the engagement hole 311 by inserting the engagement pin 95. At this point, the engagement hole 311 is elastically restored to the normal open state, and as shown in FIGS. 14, 15 and 16A, the engagement claw of the engagement pin 95 is formed. The region 95A engages with the engagement protrusion 311c of the engagement hole 311. 14 shows a state in which the seat back cover 9 is assembled to the seat shell 31 in a cross section corresponding to the cross section taken along the line bb of FIG. 10, and FIG. 15 shows the seat back cover 9 on the seat shell 31. The assembled state is shown by a cross section corresponding to the cross section taken along the line cc of FIG. 10, and FIG. 16 (a) is a partially enlarged view of FIG. In the present embodiment, the direction in which the pair of slits 311b provided in each engagement hole 311 faces is set substantially parallel to the lateral width direction of the seat 3, whereas the end of the engagement claw 952, that is, the engagement. Since the direction in which the pair of stepped portions 95C, which are the boundary portion between the engaging claw forming region 95A and the engaging claw non-forming region 95B, faces is set substantially parallel to the front-rear direction of the seat 3, the engaging pin 95 is engaged. In the engaged state engaged with the joint hole 311, the step portion 95 </ b> C of the engagement claw 952 and the slit 311 b of the engagement hole 311 are not aligned on the same straight line but are substantially orthogonal to each other. As a result, even when a force that pulls the engagement pin 95 straight in the anti-insertion direction is applied in the engaged state, the engagement claw forming region 95A is caught by the engagement protrusion 311c of the engagement hole 311 and the engagement pin 95 is prevented from coming off from the engagement hole 311.

このように、係合ピン95と係合孔311とが、座裏カバー9と座シェル31とを相互に取り付ける際に利用される係合機構Kとして機能し、上記手順により座裏カバー9を座シェル31に取り付けることができる。すなわち、係合機構Kが、係合ピン95と係合孔311とを相互に係合させた係合状態となることによって座裏カバー9と座シェル31とを相互に組み付けることができる。   Thus, the engagement pin 95 and the engagement hole 311 function as the engagement mechanism K used when the seat back cover 9 and the seat shell 31 are attached to each other. It can be attached to the seat shell 31. That is, the seat back cover 9 and the seat shell 31 can be assembled to each other when the engagement mechanism K is in an engaged state in which the engagement pin 95 and the engagement hole 311 are engaged with each other.

座裏カバー9と座シェル31とを係合機構Kによって相互に組み付けた状態において、座裏カバー9の開口部91のうちガスシリンダ用孔911と、支持基部4の脚支柱受け部43のうち筒状部431とが高さ方向に連通し、ガスシリンダを内部に配した脚支柱22を、これらガスシリンダ用孔911及び筒状部431に続けて差し込んで取り付けると、ガスシリンダの頭部が、支持基部4の筒状部431に臨む位置に位置付けられる。また、座裏カバー9の開口部91のうち操作レバー用孔912に操作レバー7の基端部近傍領域(具体的にはレバー本体71の屈曲部713)が位置付けられ、操作レバー用孔912内におけるレバー本体71の前記押圧位置と前記非押圧位置との間での回動を許容している。   In the state where the seat back cover 9 and the seat shell 31 are assembled to each other by the engagement mechanism K, the gas cylinder hole 911 in the opening 91 of the seat back cover 9 and the leg strut receiving portion 43 of the support base 4 When the leg column 22 that communicates with the cylindrical portion 431 in the height direction and the gas cylinder is disposed therein is inserted into and attached to the gas cylinder hole 911 and the cylindrical portion 431, the head of the gas cylinder is attached. The support base 4 is positioned at a position facing the cylindrical portion 431. In addition, a region near the base end of the operation lever 7 (specifically, a bent portion 713 of the lever main body 71) is positioned in the operation lever hole 912 in the opening 91 of the seat back cover 9, and the inside of the operation lever hole 912. The lever main body 71 is allowed to rotate between the pressing position and the non-pressing position.

一方、係合孔311に係合ピン95を係合させて座シェル31に座裏カバー9を取り付けた本実施形態の樹脂製部材同士の取付構造は、座裏カバー9のうち係合ピン95の基端部を設けた部位を傾けることにより係合ピン95自体を、係合爪非形成領域95Bが係合孔311の周縁311aに当たって当該周縁311aを押圧し得る角度まで傾けることが可能な傾動手段を利用して、係合ピン95と係合孔311との係合状態を解除するように構成されている。   On the other hand, the mounting structure of the resin members of this embodiment in which the engagement pin 95 is engaged with the engagement hole 311 and the seat back cover 9 is attached to the seat shell 31 is the engagement pin 95 of the seat back cover 9. By tilting the portion where the base end portion of the engaging pin 95 is tilted, the engaging pin 95 itself can be tilted to an angle at which the engaging claw non-forming region 95B can hit the peripheral edge 311a of the engaging hole 311 and press the peripheral edge 311a. The engagement state between the engagement pin 95 and the engagement hole 311 is released using the means.

傾動手段は、座裏カバー9自体を湾曲変形させることによって、剛性の高い係合ピン95自体を、係合爪非形成領域95Bが係合孔311の周縁311aに当たって係合孔311をスリット311bによる弾性変形を利用して押し広げ且つ当該係合爪非形成領域95Bが係合孔311から外れ出る角度まで傾けるものである。本実施形態では、座裏カバー9のうち係合ピン95の基端部を設けた部位を座シェル31から離間させる方向に反らす力を付与することにより、取付基部96がその反り程度(座裏カバー9の湾曲程度)に応じて傾き、取付基部96の傾動に同期して係合ピン95が係合孔311内で傾くようにしている。具体的には、図16(b)に示すように、係合ピン95自体を弾性変形不能な又は弾性変形が抑制される剛性の高い構造とし、このような係合ピン95を撓み変形可能な座裏カバー9に一体に設けることにより、この座裏カバー9のうち、係合ピン95の基端部を設けた部位、つまり取付基部96を設けた部位を、座シェル31から離間する方向に反らす操作力を加えることによって、係合ピン95が取付基部96の傾動に応じて係合孔311内で傾き、係合ピン95の係合爪非形成領域95Bが係合孔311の周縁311aを押圧し、この押圧力を受けて係合孔311が、スリット311bの作用により開口寸法を拡開する方向に弾性変形して拡開状態となる。なお、本実施形態では、係合ピン95の係合爪非形成領域95Bが係合孔311の周縁311aを押圧することに加えて、係合ピン95の軸部951のうち、係合爪形成領域95A及び係合爪非形成領域95Bよりも基端側の部位が周縁311aの係合突起311cを押圧する構成としている。これによって、係合孔311を通常開口状態から拡開状態へよりスムーズに移行させることができる。また、本実施形態では、係合ピン95が、軸部951の先端部を係合爪形成領域95Aと係合爪非形成領域95Bとに軸回りに二分割しているため、係合ピン95を係合孔311に係合させた状態において、係合ピン95のうち係合爪非形成領域95Bと係合孔311の周縁311aとの間に、係合ピン95の傾動を許容する空間が形成されている(図16(a)参照)。本実施形態では、係合ピン95を係合孔311に係合させた状態において、係合爪形成領域95A及び係合爪非形成領域95Bが係合孔311内に収まっているため、係合爪形成領域95A及び係合爪非形成領域95Bが係合孔311内に収まらずに座シェル31の上面よりも上方に突出する態様であれば生じる不具合、すなわち、係合爪形成領域95A及び係合爪非形成領域95Bが例えば座クッション材32に埋もれてしまい、係合ピン95自体を傾けることができない、又は係合ピン95の傾動をスムーズに行うことが出来ないという不具合を回避できる。   By tilting and deforming the seat back cover 9 itself, the tilting means causes the highly rigid engaging pin 95 itself to contact the engaging claw non-forming region 95B against the peripheral edge 311a of the engaging hole 311 so that the engaging hole 311 is formed by the slit 311b. It is expanded using elastic deformation and tilted to an angle at which the engagement claw non-formation region 95 </ b> B comes out of the engagement hole 311. In the present embodiment, by applying a force to warp the portion of the seat back cover 9 in which the base end portion of the engagement pin 95 is provided in the direction away from the seat shell 31, the mounting base 96 is warped (the seat back). The engagement pin 95 is inclined in the engagement hole 311 in synchronization with the inclination of the attachment base 96. Specifically, as shown in FIG. 16 (b), the engagement pin 95 itself has a highly rigid structure that cannot be elastically deformed or suppressed, and such an engagement pin 95 can be flexibly deformed. By providing the seat back cover 9 integrally, a portion of the seat back cover 9 where the base end portion of the engagement pin 95 is provided, that is, a portion where the mounting base portion 96 is provided is separated from the seat shell 31. By applying the operation force to warp, the engaging pin 95 is tilted in the engaging hole 311 according to the tilting of the mounting base 96, and the engaging claw non-formation region 95 </ b> B of the engaging pin 95 causes the peripheral edge 311 a of the engaging hole 311 to move. The engaging hole 311 receives the pressing force and is elastically deformed in the direction of expanding the opening size by the action of the slit 311b to be in the expanded state. In this embodiment, the engagement claw non-formation region 95 </ b> B of the engagement pin 95 presses the peripheral edge 311 a of the engagement hole 311, and the engagement claw formation of the shaft portion 951 of the engagement pin 95 is performed. A region closer to the base end than the region 95A and the engagement claw non-formation region 95B presses the engagement protrusion 311c of the peripheral edge 311a. Thereby, the engagement hole 311 can be more smoothly shifted from the normal opening state to the expanded state. Further, in the present embodiment, the engagement pin 95 divides the tip end portion of the shaft portion 951 into the engagement claw formation region 95A and the engagement claw non-formation region 95B around the axis. In a state in which the engagement pin 3 is engaged, a space allowing the tilt of the engagement pin 95 is provided between the engagement claw non-formation region 95B of the engagement pin 95 and the peripheral edge 311a of the engagement hole 311. It is formed (see FIG. 16A). In the present embodiment, the engagement claw forming area 95A and the engagement claw non-formation area 95B are within the engagement hole 311 when the engagement pin 95 is engaged with the engagement hole 311. If the claw formation region 95A and the engagement claw non-formation region 95B do not fit in the engagement hole 311 and protrude upward from the upper surface of the seat shell 31, that is, the problem that occurs, that is, the engagement claw formation region 95A and the engagement claw For example, it is possible to avoid the problem that the non-claw forming area 95B is buried in the seat cushion material 32, for example, and the engagement pin 95 itself cannot be tilted or the engagement pin 95 cannot be tilted smoothly.

引き続き、図16(c)に示すように、さらに座裏カバー9を反らせる操作力、又は係合ピン95を係合孔311に係合させる際の挿入方向とは逆の方向(反挿入方向)に引っ張る操作力を付与すると、拡開状態にある係合孔311から係合ピン95の係合爪非形成領域95Bに続いて係合ピン95の係合爪形成領域95Aの少なくとも一部が抜け外れ、さらに同じ操作力を付与し続けることによって、前記一部抜け外れた箇所をきっかけにまだ係合孔311に係合している残りの係合爪形成領域95Aが漸次又は一気に係合孔311から抜け外れ、係合ピン95と係合孔311との係合状態が解除される。本実施形態では、座裏カバー9の各コーナー部近傍部位に設けた係合ピン95を座シェル31の係合孔311に係合させた態様であるため、計4箇所の係合箇所において、係合ピン95と係合孔311とからなる各係合機構Kを上述した操作によって順次係合解除状態とすることにより、座裏カバー9を座シェル31から分離することができる。   Subsequently, as shown in FIG. 16C, an operation force that further warps the seat back cover 9, or a direction opposite to the insertion direction when the engagement pin 95 is engaged with the engagement hole 311 (anti-insertion direction). When the pulling operation force is applied, at least a part of the engagement claw formation region 95A of the engagement pin 95 is removed from the engagement hole 311 in the expanded state following the engagement claw non-formation region 95B of the engagement pin 95. The remaining engagement claw forming region 95A that is still engaged with the engagement hole 311 triggered by the part that has been partially removed is gradually or at a stroke by continuing to apply the same operating force. The engagement state between the engagement pin 95 and the engagement hole 311 is released. In the present embodiment, since the engagement pins 95 provided in the vicinity of the corner portions of the seat back cover 9 are engaged with the engagement holes 311 of the seat shell 31, The seat back cover 9 can be separated from the seat shell 31 by sequentially disengaging the engagement mechanisms K including the engagement pins 95 and the engagement holes 311 by the above-described operation.

特に、本実施形態では、係合ピン95を座裏カバー9の各コーナー部近傍部位に一体に設けているため、係合ピン95を座裏カバー9の辺部分に相当する部位や、中央部近傍部位に設けた場合と比較して、座裏カバー9のうち係合ピン95の基端部を設けた部位を傾ける際に要する座裏カバー9を反らせる操作を比較的軽い力で行うことができる。   In particular, in the present embodiment, since the engagement pin 95 is integrally provided in the vicinity of each corner portion of the seat back cover 9, the engagement pin 95 is a portion corresponding to the side portion of the seat back cover 9 or the center portion. Compared with the case where it is provided in the vicinity, the operation of warping the seat back cover 9 required when the part of the seat back cover 9 provided with the base end portion of the engagement pin 95 is tilted can be performed with a relatively light force. it can.

このように、係合ピン95及び係合孔311を備えてなる係合機構Kは、係合ピン95と係合孔311とを相互に係合させた状態において、作業者が座裏カバー9のコーナー部近傍部位を座シェル31から離間させる方向に反らせることにより、係合ピン95を係合孔311内で傾動させて係合爪非形成領域95Bを係合孔311から抜け出させた係合解除初期状態となり、この係合解除初期状態において、さらに係合ピン95を係合孔311から引き離す方向に座シェル31を反らせる又は引っ張ることによって係合ピン95全体を係合孔311から抜き外した係合解除状態となる。   As described above, the engagement mechanism K including the engagement pin 95 and the engagement hole 311 allows the operator to place the seat back cover 9 in a state where the engagement pin 95 and the engagement hole 311 are engaged with each other. The engagement portion 95 is tilted in the engagement hole 311 by causing the vicinity of the corner of the corner portion to warp away from the seat shell 31, and the engagement claw non-forming region 95 </ b> B is pulled out of the engagement hole 311. In this initial state of disengagement, the entire engagement pin 95 is removed from the engagement hole 311 by further warping or pulling the seat shell 31 in the direction of separating the engagement pin 95 from the engagement hole 311. The engagement is released.

このように、本実施形態に係る樹脂製部材同士の取付構造は、係合ピン95を係合孔311に挿入して係合させた状態において、係合ピン95を反挿入方向へ引っ張る力が作用した場合であっても係合ピン95の軸部951のうち係合爪形成領域95Aが係合孔311の係合突起311cに引っ掛かり、係合ピン95が係合孔311から抜け外れることを防止できるとともに、係合ピン95の軸部951の先端部を係合爪形成領域95Aと係合爪非形成領域95Bとに軸回りに二分割しているため、係合ピン95と係合孔311とを相互に係合させた状態において、係合ピン95のうち係合爪非形成領域95Bと係合孔311の周縁311aとの間に係合ピン95の傾動を許容する空間が形成され、傾動手段を利用して係合ピン95を係合孔311内で傾けることができ、剛性の高い係合ピン95を傾動させて係合孔311の周縁311aを押圧することによって係合孔311がスリット311bの作用により開口寸法を拡開する方向に弾性変形し、係合爪非形成領域95Bが係合孔311から抜け外れ、さらに係合ピン95を傾動させる又は反挿入方向へ引っ張る力が作用した場合に、係合爪非形成領域95Bに続いて係合爪形成領域95Aも係合孔311から抜け外れ、係合ピン95全体を係合孔311から抜き外すことができる。   Thus, the mounting structure of the resin members according to the present embodiment has a force that pulls the engagement pin 95 in the anti-insertion direction in a state where the engagement pin 95 is inserted into the engagement hole 311 and engaged. Even if it acts, the engagement claw forming region 95A of the shaft portion 951 of the engagement pin 95 is caught by the engagement protrusion 311c of the engagement hole 311 and the engagement pin 95 is detached from the engagement hole 311. In addition to being able to prevent, the tip of the shaft portion 951 of the engagement pin 95 is divided into the engagement claw formation region 95A and the engagement claw non-formation region 95B around the shaft, so that the engagement pin 95 and the engagement hole In a state where the 311 is engaged with each other, a space allowing the tilting of the engaging pin 95 is formed between the engaging claw non-forming region 95 </ b> B of the engaging pin 95 and the peripheral edge 311 a of the engaging hole 311. The engagement pin 95 is engaged with the engagement hole by using the tilting means. 11, the engaging pin 95 having high rigidity is tilted to press the peripheral edge 311 a of the engaging hole 311, and the engaging hole 311 is elastic in the direction of expanding the opening dimension by the action of the slit 311 b. When the engaging claw non-formation region 95B is detached from the engagement hole 311 and a force for tilting the engagement pin 95 or pulling in the anti-insertion direction is applied, the engagement claw non-formation region 95B continues. The engaging claw forming region 95 </ b> A is also removed from the engaging hole 311, and the entire engaging pin 95 can be removed from the engaging hole 311.

したがって、樹脂製部材である座裏カバー9及び座シェル31を一旦組み付けた後において、部品交換やメンテナンス等、その組付状態を解除しなければならない場合に、係合爪952と係合孔311との係合力を超える過度の引っ張り力、引き抜き力が要求されず、座裏カバー9を座シェル31から取り外す作業をスムーズに行うことができる。しかも、係合ピン95に急な引っ張り力が作用することを回避し、係合爪952、ひいては係合ピン95自体の破損を防止することができる。   Therefore, after the seat back cover 9 and the seat shell 31 that are resin members are once assembled, the engagement claws 952 and the engagement holes 311 are required when the assembled state must be released for parts replacement or maintenance. Excessive pulling force and pulling force exceeding the engagement force with the seat shell 31 are not required, and the work of removing the seat back cover 9 from the seat shell 31 can be performed smoothly. In addition, it is possible to avoid a sudden pulling force from acting on the engagement pin 95, and to prevent the engagement claw 952 and thus the engagement pin 95 itself from being damaged.

特に傾動手段が、座裏カバー9自体を傾けることによって、係合ピン95自体を、係合爪非形成領域95Bが係合孔311の周縁311aに当たって当該周縁311aを押圧し且つ係合孔311から抜け外れる角度まで傾けるものであるため、座裏カバー9に係合ピン95を傾動させるための別途専用の傾動機構を設ける必要がなく、構造の簡素化を図ることができる。   Particularly, when the tilting means tilts the seat back cover 9 itself, the engagement pin 95 itself is brought into contact with the periphery 311a of the engagement hole 311 by the engagement claw non-formation region 95B and presses the periphery 311a. Since it is tilted to an angle that allows it to come off, it is not necessary to provide a separate dedicated tilting mechanism for tilting the engagement pin 95 in the seat back cover 9, and the structure can be simplified.

さらに、係合ピン95を係合孔311に係合させた状態で、係合爪952の端部、つまり係合爪形成領域95Aと係合爪非形成領域95Bとの境界部分にある段部95Cと、係合孔311のスリット311bとが、同一直線上に並ばないようにしているため、係合状態において係合ピン95を反挿入方向へ引っ張る力が作用した場合であっても係合ピン95が係合孔311のスリット311bから不意に抜け外れることを防止し、良好な係合状態を実現できる。   Further, in a state where the engagement pin 95 is engaged with the engagement hole 311, an end portion of the engagement claw 952, that is, a step portion at a boundary portion between the engagement claw formation region 95 </ b> A and the engagement claw non-formation region 95 </ b> B. 95C and the slit 311b of the engagement hole 311 are not aligned on the same straight line, so that even when a force pulling the engagement pin 95 in the anti-insertion direction is applied in the engaged state, the engagement is performed. The pin 95 can be prevented from unexpectedly coming off from the slit 311b of the engagement hole 311 and a good engagement state can be realized.

また、係合ピン95を座裏カバー9のコーナー部又はコーナー部近傍部位に一体に設けているため、座裏カバー9のうち係合ピン95の基端部を設けた部位を傾ける際に要する座裏カバー9を反らせる操作を比較的軽い力で行うことができ、座裏カバー9を座シェル31から取り外す作業をスムーズ且つ確実に行うことができる。   Further, since the engagement pin 95 is integrally provided at the corner portion of the seat back cover 9 or a portion near the corner portion, it is necessary to tilt the portion of the seat back cover 9 where the base end portion of the engagement pin 95 is provided. The operation of warping the seat back cover 9 can be performed with a relatively light force, and the operation of removing the seat back cover 9 from the seat shell 31 can be performed smoothly and reliably.

加えて、座3の左右巾方向に対向する係合ピン95を、係合爪形成領域95A同士が内向きに対向するように設けているため、複数の係合ピン95を座裏カバー9に一体成型する場合に用いる金型を作る上で、抜き方向を考慮した場合に設計上要求される条件を満たし、複数の係合ピン95を有する座裏カバー9を一体成型品とすることが可能になるとともに、各係合ピン95の係合爪非形成領域95Bが座裏カバー9の外縁側に設けられることにより、座裏カバー9を座シェル31から引き離す方向に反らす操作力を付与した場合に、相対的に外縁側に位置する係合爪非形成領域95Bを係合孔311の周縁311aに当てて押圧させる動作を効率良く行うことができる。   In addition, since the engagement pins 95 facing the lateral width direction of the seat 3 are provided so that the engagement claw forming regions 95A face each other inwardly, the plurality of engagement pins 95 are attached to the seat back cover 9. It is possible to make the seat back cover 9 having a plurality of engagement pins 95 as an integrally molded product that satisfies the design requirements when considering the pulling direction when making the mold used for integral molding. In addition, when the engagement claw non-formation region 95B of each engagement pin 95 is provided on the outer edge side of the seat back cover 9, an operation force that warps the seat back cover 9 away from the seat shell 31 is given. In addition, it is possible to efficiently perform an operation in which the engagement claw non-formation region 95 </ b> B positioned relatively on the outer edge side is pressed against the peripheral edge 311 a of the engagement hole 311.

さらに、座裏カバー9に複数の係合ピン95を一体に設け、座シェル31に係合ピン95と同数の係合孔311を一体に設けているため、複数の係合箇所を確保し、座裏カバー9と座シェル31との安定した取付状態を維持できる。   Furthermore, since a plurality of engagement pins 95 are integrally provided in the seat back cover 9, and the same number of engagement holes 311 as the engagement pins 95 are integrally provided in the seat shell 31, a plurality of engagement portions are secured. The stable attachment state of the seat back cover 9 and the seat shell 31 can be maintained.

なお、本発明は、以上に詳述した実施形態に限られるものではない。   The present invention is not limited to the embodiment described in detail above.

例えば、係合ピンの軸部が中実の円柱状のものであってもよい。また、係合ピンは、軸部の先端部を係合爪形成領域と係合爪非形成領域とに軸回りに二分割したものであればよく、軸回りに占める係合爪形成領域と係合爪非形成領域との割合が均等でない態様であっても構わない。例えば、係合爪形成領域を係合爪非形成領域よりも大きく設定した場合には、より良好な係合状態を確保することができ、その逆、つまり係合爪非形成領域を係合爪形成領域よりも大きく設定した場合には、係合ピンを係合孔から抜き外す作業をよりスムーズに行うことができる。   For example, the shaft portion of the engagement pin may be a solid cylindrical shape. Further, the engaging pin may be formed by dividing the tip end portion of the shaft portion into the engagement claw forming region and the engagement claw non-forming region around the axis, and the engagement pin occupies the engagement claw formation region occupied around the axis. It may be an aspect in which the ratio with the non-claw forming area is not uniform. For example, when the engagement claw formation region is set larger than the engagement claw non-formation region, a better engagement state can be secured, and conversely, that is, the engagement claw non-formation region is set to the engagement claw. When it is set to be larger than the formation region, the operation of removing the engagement pin from the engagement hole can be performed more smoothly.

また、前記実施形態では、第1の樹脂製部材として座裏カバーを適用し、第2の樹脂製部材として座シェルを適用した態様を例示したが、第1の樹脂製部材及び第2の樹脂製部材は相互に組付可能な薄板状のシェル構造体(インナーシェル及びアウターシェル)であればよく、第2の樹脂製部材として背シェルを適用し、第1の樹脂製部材として背シェルの背面側に組付可能な背カバーを適用しても構わない。なお、上方又は前方にクッション材が配されない座シェルや背シェルであれば、これら座シェルや背シェルに係合ピンを一体に設け、座裏カバーや背カバーに係合孔を一体に設けてもよい。つまり、インナーシェルに係合ピンを設け、アウターシェルに係合孔を設けた態様であっても構わない。   Moreover, although the seat back cover was applied as the first resin member and the seat shell was applied as the second resin member in the above embodiment, the first resin member and the second resin are exemplified. The manufactured member may be a thin plate-like shell structure (inner shell and outer shell) that can be assembled to each other, and the back shell is applied as the second resin member, and the back shell is used as the first resin member. You may apply the back cover which can be assembled | attached to a back side. For seat shells and back shells that do not have a cushion material on the top or front, an engagement pin is provided integrally with these seat shells and back shell, and an engagement hole is provided integrally with the seat back cover and back cover. Also good. That is, an aspect in which an engagement pin is provided in the inner shell and an engagement hole is provided in the outer shell may be employed.

また、係合ピンが取付基部を介さずに第1の樹脂製部材に一体に設けられたものであってもよい。   Further, the engagement pin may be provided integrally with the first resin member without using the attachment base.

係合ピン及び係合孔の数は適宜増減しても勿論構わない。   Of course, the number of engagement pins and engagement holes may be appropriately increased or decreased.

また、係合ピンや係合孔を、各樹脂製部材の外縁部のうち辺部分に相当する部位に一体に設けた態様であってもよい。   Moreover, the aspect which provided integrally the engagement pin and the engagement hole in the site | part corresponded to a side part among the outer edge parts of each resin member may be sufficient.

また、係合孔の弾性惹起部として、スリットに代えて切欠を適用してもよい。   Further, a cutout may be applied instead of the slit as the elastic triggering portion of the engagement hole.

係合孔が、周縁に弾性惹起部を設けた単純な円筒状のもの、つまり前記実施形態の係合突起がないものであってもよい。この場合、係合孔に挿入した係合ピンの係合爪が係合孔の反挿入側の開口縁に引っ掛かることにより係合ピン及び係合孔が相互に係合する。さらには、係合孔が円筒状のものではなく、第2の樹脂製部材の厚み方向に貫通させた単純な貫通孔であっても構わない。この場合、貫通孔の周縁にスリット又は切欠を設け、第1の樹脂製部材に一体に設けた係合ピンを貫通孔に挿入して係合爪を係合させるとともに、第1の樹脂製部材のうち係合ピンの基端部を設けた部位を傾けることにより係合ピン自体を、軸部のうち係合爪非形成領域よりも基端側の部位が貫通孔の周縁に当たって当該周縁を押圧し、且つ係合爪非形成領域が係合孔から抜け外れる角度まで傾けることが可能な傾動手段を利用して、係合ピンと係合孔との係合状態を解除するように構成すればよい。   The engagement hole may be a simple cylindrical member provided with an elastic inducing portion on the periphery, that is, the engagement protrusion of the above embodiment may not be provided. In this case, the engagement pin and the engagement hole are engaged with each other by the engagement claw of the engagement pin inserted into the engagement hole being caught by the opening edge on the opposite side of the engagement hole. Furthermore, the engagement hole is not a cylindrical one, and may be a simple through hole that penetrates in the thickness direction of the second resin member. In this case, a slit or notch is provided at the periphery of the through hole, and an engagement pin integrally provided in the first resin member is inserted into the through hole to engage the engagement claw, and the first resin member By tilting the portion where the base end portion of the engagement pin is tilted, the portion of the shaft portion closer to the base end side than the region where the engagement claw is not formed hits the periphery of the through hole and presses the periphery. In addition, the engagement state between the engagement pin and the engagement hole may be released using a tilting means that can be tilted to an angle at which the engagement claw non-formation region is removed from the engagement hole. .

係合ピンの軸部が、少なくとも基端部側からアクセス可能な内部空間を有する有底筒状又は筒状のものであれば、傾動手段が、係合ピンの基端部側から内部空間に例えばドライバ等の工具を挿入して、第1の樹脂製部材自体を傾けることによって、係合ピンの軸部を傾動させ、係合ピン自体を、係合爪非形成領域又は軸部のうち係合爪非形成領域よりも基端側の部位が係合孔の周縁に当たって当該周縁を押圧し且つ係合爪非形成領域が係合孔から抜け外れる角度まで傾けるものであってもよい。   If the shaft portion of the engaging pin has a bottomed cylindrical shape or a cylindrical shape having an internal space accessible at least from the base end side, the tilting means moves from the base end side of the engaging pin to the internal space. For example, by inserting a tool such as a driver and tilting the first resin member itself, the shaft portion of the engagement pin is tilted, and the engagement pin itself is engaged with the engagement claw non-formation region or the shaft portion. A portion closer to the base end than the joint claw non-forming region may hit the peripheral edge of the engagement hole to press the peripheral edge, and may be inclined to an angle at which the engagement claw non-formation region comes out of the engagement hole.

その他、各部の具体的構成についても上記実施形態に限られるものではなく、本発明の趣旨を逸脱しない範囲で種々変形が可能である。   In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

本発明の一実施形態に係る樹脂製部材同士の組付構造を適用した椅子の全体概略図。1 is an overall schematic view of a chair to which an assembly structure of resin members according to an embodiment of the present invention is applied. 同実施形態における椅子の左右巾方向中央部断面を一部省略して示す図。The figure which abbreviate | omits and shows some cross sections of the center part of the left-right width direction of the chair in the embodiment. 同実施形態における脚支柱の組付説明図。The assembly explanatory drawing of the leg support in the embodiment. 同実施形態において背支桿カバーを装着していない背支桿を支持基部に枢支させた状態の斜視図。The perspective view of the state which pivotally supported the back support rod which is not equipped with the back support cover in the embodiment on the support base. 同実施形態において背支桿カバーを装着した背支桿、及び操作レバーをそれぞれ枢支させた支持基部の底面図。The bottom view of the support base which made the back support rod equipped with the back support rod cover and the operation lever pivot in each embodiment. 同実施形態において背支桿が後傾した状態を図2の一部に対応させて示す図。The figure which shows the state which the back support rod inclined backward in the same embodiment corresponding to a part of FIG. 同実施形態における背支桿カバーを示す図。The figure which shows the back support rod cover in the same embodiment. 同実施形態における座シェルの底面図。The bottom view of the seat shell in the embodiment. 同実施形態における係合孔を示す図。The figure which shows the engagement hole in the same embodiment. 同実施形態における座裏カバーの平面図。The top view of the seat back cover in the embodiment. 同実施形態における座裏カバーの全体図。The whole figure of the seat back cover in the embodiment. 同実施形態において座シェルに座裏カバーを組み付ける一過程を示す図。The figure which shows one process of attaching a seat back cover to a seat shell in the embodiment. 同実施形態において座シェルに座裏カバーを組み付けた状態の底面図。The bottom view of the state which attached the seat back cover to the seat shell in the embodiment. 同実施形態において座シェルに座裏カバーを組み付けた状態を図10のb―b線断面に相当する断面で示す図。The figure which shows the state which assembled | attached the seat back cover to the seat shell in the embodiment in the cross section equivalent to the bb line cross section of FIG. 同実施形態において座シェルに座裏カバーを組み付けた状態を図10のc−c線断面に相当する断面で示す図。The figure which shows the state which assembled | attached the seat back cover to the seat shell in the same embodiment by the cross section equivalent to the cc line cross section of FIG. 作用説明図。Action explanatory drawing.

符号の説明Explanation of symbols

1…椅子
31…第2の樹脂製部材(座シェル)
311…係合孔
311a…周縁
311b…弾性変形惹起部(スリット)
9…第1の樹脂製部材(座裏カバー)
95…係合ピン
951…軸部
952…係合爪
95A…係合爪形成領域
95B…係合爪非形成領域
95C…係合爪の端部(係合爪形成領域と係合爪非形成領域との境界部分にある段部)
DESCRIPTION OF SYMBOLS 1 ... Chair 31 ... 2nd resin member (seat shell)
311 ... engaging hole 311a ... peripheral edge 311b ... elastic deformation inducing part (slit)
9: First resin member (back cover)
95 ... engagement pin 951 ... shaft portion 952 ... engagement claw 95A ... engagement claw formation region 95B ... engagement claw non-formation region 95C ... engagement claw end (engagement claw formation region and engagement claw non-formation region) Step at the boundary with

Claims (6)

第1の樹脂製部材であるアウターシェルの外縁部又は外縁部近傍部位に一体に設けた係合ピンを、第2の樹脂製部材であるインナーシェルに設けた係合孔に、当該係合孔の周縁の弾性を利用して係合させることによって、前記樹脂製部材同士を組付可能に構成した樹脂製部材同士の組付構造であり、
前記係合ピンが、円柱状又は円筒状をなす軸部を主体としてなり、当該軸部の先端部をその軸回りに、係合爪を設けた係合爪形成領域と係合爪を設けていない係合爪非形成領域とに二分割したものであるとともに前記係合孔の周縁と比較して弾性変形しにくいものであり、
前記係合孔が、前記係合ピンを外嵌する円形状をなし、且つ周縁にスリット又は切欠からなる弾性変形惹起部を設けたものであり、
当該係合ピンを前記係合孔に挿入して係合させた状態で、前記アウターシェルの外縁部を前記インナーシェルから離間する方向に反らす操作力を加えることにより当該係合ピン自体を前記係合爪非形成領域又は軸部のうち係合爪非形成領域よりも基端側の部位が前記係合孔の周縁に当たって当該周縁を押圧し得る角度まで傾けることが可能な傾動手段を利用して、前記係合ピンと前記係合孔との係合状態を解除するように構成したことを特徴とする樹脂製部材同士の組付構造。
An engagement pin integrally provided on the outer edge or the outer edge vicinity portion of the outer shell, the first resin member, the engagement hole provided in the inner shell, the second resin member, the engagement hole It is an assembly structure of resin members configured to be able to assemble the resin members by engaging them using the elasticity of the periphery of the
The engaging pin is mainly composed of a columnar or cylindrical shaft part, and the engaging claw forming region provided with the engaging claw and the engaging claw are provided around the axis of the tip part of the shaft part. It is divided into a non-engagement claw non-formation region and is less elastically deformed compared to the periphery of the engagement hole ,
The engagement hole has a circular shape for externally fitting the engagement pin, and an elastic deformation inducing portion including a slit or a notch is provided on the periphery.
With the engaging pin inserted into the engaging hole and engaged, an operating force that warps the outer edge portion of the outer shell in a direction away from the inner shell is applied to the engaging pin itself. Utilizing tilting means capable of tilting the joint claw non-formation region or the shaft portion to the angle at which the base end side of the engagement claw non-formation region hits the peripheral edge of the engagement hole and can press the peripheral edge. An assembly structure of resin members, wherein the engagement state between the engagement pin and the engagement hole is released.
前記傾動手段が、前記アウターシェル自体を傾けることによって、前記係合ピン自体を、前記係合爪非形成領域又は前記軸部のうち係合爪非形成領域よりも基端側の部位が前記係合孔の周縁に当たって当該周縁を押圧し且つ係合爪非形成領域が前記係合孔から抜け外れる角度まで傾けるものである請求項1記載の樹脂製部材同士の組付構造。 When the tilting means tilts the outer shell itself, the engagement pin itself is placed on the engagement claw non-formation region or the portion of the shaft portion closer to the proximal end than the engagement claw non-formation region. 2. The assembly structure of resin members according to claim 1, which hits the peripheral edge of the joint hole and presses the peripheral edge and inclines to an angle at which the engagement claw non-formation region is detached from the engagement hole. 前記係合ピンを前記係合孔に係合させた状態で、前記係合爪の端部と、前記係合孔の前記弾性変形惹起部とが、同一直線上に並ばないようにしている請求項1又は2記載の樹脂製部材同士の取付構造。 An end portion of the engagement claw and the elastic deformation inducing portion of the engagement hole are not aligned on the same straight line in a state where the engagement pin is engaged with the engagement hole. Item 3. A mounting structure between resin members according to item 1 or 2. 前記アウターシェルのコーナー部又はコーナー部近傍部位に前記係合ピンを一体に設けている請求項1、2又は3記載の樹脂製部材同士の取付構造。 The mounting structure for resin members according to claim 1, 2, or 3 , wherein the engaging pins are integrally provided at a corner portion of the outer shell or a portion in the vicinity of the corner portion . 前記アウターシェルが各コーナー部又は各コーナー部近傍部位にそれぞれ前記係合ピンを一体に設けたものであり、
左右巾方向に対向する係合ピンを、前記係合爪形成領域同士が内向きに対向するように設けている請求項1、2、3又は4記載の樹脂製部材同士の取付構造。
The outer shell is provided integrally with each engaging pin at each corner portion or in the vicinity of each corner portion,
Influences the width engaging pin opposite the direction, the engaging pawl forming region mounting structure of the resin members to each other of which claims 1, 2, 3 or 4, wherein provided to face each other inwardly.
前記アウターシェルが前記係合ピンを複数備えたものであり、前記インナーシェルが前記係合ピンと同数の前記係合孔を備えたものである請求項1、2、3、4又は5記載の樹脂製部材同士の取付構造。 6. The resin according to claim 1, wherein the outer shell includes a plurality of the engagement pins, and the inner shell includes the same number of the engagement holes as the engagement pins. Mounting structure between manufactured members.
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