JP2010075593A - Spiral spring mounting structure for vehicle seat - Google Patents

Spiral spring mounting structure for vehicle seat Download PDF

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JP2010075593A
JP2010075593A JP2008249888A JP2008249888A JP2010075593A JP 2010075593 A JP2010075593 A JP 2010075593A JP 2008249888 A JP2008249888 A JP 2008249888A JP 2008249888 A JP2008249888 A JP 2008249888A JP 2010075593 A JP2010075593 A JP 2010075593A
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spiral spring
locking
winding
spring
members
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JP5228756B2 (en
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Yoshiaki Niimi
義明 新美
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Toyota Boshoku Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To improve easiness in mounting a spiral spring. <P>SOLUTION: The inner end 22 of the spiral spring 20 is relatively unrotatably mounted on the lock part 25 of one member 12 between two members. The lock winding part 30a of an outer end 30 is moved in a width direction W along the lock part 34 of the other member 14 between the two members, received from a spring operating direction A generated in the lock part 34, and mounted on the lock part 34 of the other member 14 by a guide structure for guiding to a lock recession 36 positioning the width direction W. The guide structure is formed in an inclination shape by which at least one of the lock winding part 30a and a sliding path, where the lock winding part 30a in the lock part 34 of the other member 14 is slid to the position of the lock recession 36, is made to be in a winding-up direction B when the lock winding part 30a is moved to the lock recession 36 in the width direction W. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、車両用シートのスパイラルスプリングの取付構造に関する。   The present invention relates to a mounting structure for a spiral spring of a vehicle seat.

従来、車両用シートには、座面を構成するシートクッションに対して背凭れであるシートバックを回動変位させてシートクッションの角度を調節することのできるリクライニング機構において、シートバックが前傾する回動方向に付勢されたものがある。すなわち、シートクッションの角度を保持するロックを解除するとシートバックが回動して前傾状態となる車両用シートがあった。かかる車両用シートでは、シートバックの回動位置を中心として配置されたスパイラルスプリングのバネ力（復元力）によりシートクッションが付勢されている。図５に例示されるように、スパイラルスプリング２０の内外の端部２２，３０は折り返し成形されており、先ず内側端部２２がクッションフレーム１２の掛止部位８５に掛止され、次いで、バネ力に抗して外側端部３０が巻き上げ方向に引っ張られながらがバックフレーム１４の掛止部位９４に掛止される。これにより、スパイラルスプリング２０は初期トルクを付与された状態、すなわち弾性エネルギーを蓄えた状態で取付けられる。各掛止部位８５，９４には切欠部８６，９５が形成されており、スパイラルスプリング２０の両端部２２，３０は、それぞれ切欠部８６，９５に嵌め込まれて掛止されることにより横滑りして脱落しないように保持されている。このように、スパイラルスプリングの端部が掛止部位の切欠部に嵌った状態で掛止されているスパイラルスプリングの取付構造は、例えば下記特許文献１に開示されている。かかるスパイラルスプリングの取付構造は、掛止部位に切欠部を形成することにより、少ない部品点数でスパイラルスプリングの脱落が防止されている点では有利である。   2. Description of the Related Art Conventionally, in a vehicle seat, a seat back is tilted forward in a reclining mechanism that can adjust the angle of the seat cushion by rotationally displacing the seat back that is a backrest with respect to the seat cushion that constitutes the seat surface. Some are biased in the direction of rotation. That is, there has been a vehicle seat in which the seat back is turned forward when the lock for holding the angle of the seat cushion is released. In such a vehicle seat, the seat cushion is urged by the spring force (restoring force) of a spiral spring disposed around the rotational position of the seat back. As illustrated in FIG. 5, the inner and outer ends 22 and 30 of the spiral spring 20 are folded back. First, the inner end 22 is hooked on the hooking portion 85 of the cushion frame 12, and then the spring force is applied. The outer end 30 is hooked on the hooking portion 94 of the back frame 14 while being pulled in the winding direction against the above. Thereby, the spiral spring 20 is attached in a state where an initial torque is applied, that is, in a state where elastic energy is stored. Notches 86 and 95 are formed in the respective latching portions 85 and 94, and both end portions 22 and 30 of the spiral spring 20 are slipped by being fitted into the notches 86 and 95 and latched, respectively. It is held so as not to fall off. Thus, the attachment structure of the spiral spring which is latched in the state in which the end of the spiral spring is fitted in the notch portion of the latching portion is disclosed in, for example, Patent Document 1 below. Such a mounting structure of the spiral spring is advantageous in that the spiral spring is prevented from falling off with a small number of parts by forming a notch in the hooking portion.

特開２００７―８２９１９号公報JP 2007-82919 A

しかし、スパイラルスプリングの外側端部を切欠部に嵌め込んで取付けるにあたり、外側端部をバネ力に抗して取付状態よりも巻き上げ方向に引っ張りながら、スパイラルスプリングの帯幅方向へ移動させて切欠部に回り込ませなければならない。そのため、スパイラルスプリングの外側端部の操作方向が複雑であるとともに、該操作には大きな力を要し、その取付け作業は必ずしも容易ではなかった。   However, when fitting the outer end of the spiral spring into the notch, the outer end is pulled in the winding direction against the spring force, and moved in the band width direction of the spiral spring while being notched. You have to wrap around. For this reason, the operation direction of the outer end portion of the spiral spring is complicated, and a large force is required for the operation, and the attaching operation is not always easy.

そこで、本発明は、スパイラルスプリングの取付け易さを向上させることを課題とした。   Then, this invention made it the subject to improve the attachment ease of a spiral spring.

本発明は、上記課題を解決するために以下の手段をとる。
第１の発明は、車両用シートに備えられ、相対的に回動変位可能に配設された２部材間に、該２部材に対し相対回動方向のバネ力を付勢するように配設される帯板状のスパイラルスプリングの前記２部材への取付構造であって、前記スパイラルスプリングの内側端部は前記２部材の一方の部材の掛止部位に取付けられ、前記スパイラルスプリングの外側端部は前記２部材の他方の部材の掛止部位に取付けられ、前記スパイラルスプリングの外側端部には径方向外方へ折り曲げ形成された係止巻き部が設けられており、前記他方の部材の掛止部位には前記係止巻き部を前記スパイラルスプリングのバネ作用方向から受け入れて帯幅方向の位置決めを行う係止凹部が帯板状のスパイラルスプリングの帯幅方向に沿って形成されており、前記スパイラルスプリングの外側端部は、前記係止巻き部を前記他方の部材の掛止部位に沿って帯幅方向に移動させて前記係止凹部へ案内するガイド構造により前記他の部材の掛止部位に取付けられ、該ガイド構造は、前記スパイラルスプリングの外側端部に形成された係止巻き部と、前記他方の部材の掛止部位における前記係止巻き部が前記係止凹部の位置まで摺動する摺動経路との少なくとも一方が、前記係止巻き部の前記係止凹部への帯幅方向の移動の際に前記スパイラルスプリングが巻き上げ方向となる傾斜形状に形成されていることを特徴とする。 The present invention takes the following means in order to solve the above problems.
1st invention is equipped with the vehicle seat, and it arrange | positions so that the spring force of a relative rotation direction may be urged | biased with respect to these 2 members between 2 members arrange | positioned so that rotation displacement is relatively possible. The strip plate-like spiral spring is attached to the two members, wherein the inner end of the spiral spring is attached to the hooking portion of one of the two members, and the outer end of the spiral spring Is attached to the latching portion of the other member of the two members, and the outer end portion of the spiral spring is provided with a locking winding portion bent outward in the radial direction. A locking recess for receiving the locking winding portion from the spring acting direction of the spiral spring and positioning in the band width direction is formed in the locking portion along the band width direction of the band plate-shaped spiral spring, spy The outer end portion of the spring spring has a guide structure for moving the locking winding portion in the band width direction along the locking portion of the other member and guiding the locking winding portion to the locking recess. The guide structure includes a locking winding formed at an outer end of the spiral spring, and the locking winding at the latching portion of the other member slides to the position of the locking recess. At least one of the sliding paths is formed in an inclined shape in which the spiral spring is in the winding direction when the locking winding portion moves to the locking recess in the band width direction. .

第１の発明によれば、係止巻き部を他方の部材の掛止部位に沿って帯幅方向に移動させると、スパイラルスプリングの外側端部に形成された係止巻き部と、他方の部材の掛止部位における係止巻き部が係止凹部の位置まで摺動する摺動経路との少なくとも一方に形成された傾斜形状により、係止巻き部がスパイラルスプリングの巻き上げ方向へ案内される。つまり、係止巻き部を他方の部材の掛止部位に沿わせれば、帯幅方向に移動させる一方向の操作力が加えられることにより、係止巻き部は帯幅方向へ移動させられながら、同時にバネ力に抗して巻き上げ方向へも変位させられて係合凹部の位置へ案内され、スパイラルスプリング自体のバネ力により係止凹部に嵌り込む。したがって、より容易にスパイラルスプリングを取付けることが可能である。   According to the first invention, when the locking winding portion is moved in the band width direction along the latching portion of the other member, the locking winding portion formed on the outer end portion of the spiral spring and the other member The locking winding portion is guided in the winding direction of the spiral spring by the inclined shape formed on at least one of the sliding path where the locking winding portion slides to the position of the locking recess. That is, if the locking winding part is moved along the hooking part of the other member, an operating force in one direction that moves in the band width direction is applied, so that the locking winding part is moved in the band width direction, At the same time, it is displaced in the winding direction against the spring force and guided to the position of the engaging recess, and is fitted into the locking recess by the spring force of the spiral spring itself. Therefore, it is possible to attach the spiral spring more easily.

第２の発明は、前記他方の部材の掛止部位における前記係止巻き部が前記係止凹部の位置まで摺動する摺動経路が、前記係止巻き部の前記係止凹部への帯幅方向の移動の際に前記スパイラルスプリングが巻き上げ方向となる傾斜形状に形成されており、該傾斜形状は湾曲形状として形成されていることを特徴とする。   According to a second aspect of the present invention, there is provided a sliding path in which the locking winding portion at the latching portion of the other member slides to the position of the locking recess, and the band width of the locking winding portion to the locking recess. The spiral spring is formed in an inclined shape that becomes a winding direction when moving in the direction, and the inclined shape is formed as a curved shape.

第２の発明によれば、他方の部材の掛止部位の傾斜形状を湾曲形状とすることにより、掛止部位の先端部の強度を確保しやすい。   According to 2nd invention, it is easy to ensure the intensity | strength of the front-end | tip part of a latching site | part by making the inclination shape of the latching site | part of the other member into a curved shape.

第３の発明は、前記２部材はシートクッションとシートバックとであり、前記スパイラルスプリングのバネ力は前記シートバックのリクライニング機構を構成することを特徴とする。   In a third aspect of the invention, the two members are a seat cushion and a seat back, and the spring force of the spiral spring constitutes a reclining mechanism of the seat back.

第３の発明によれば、相対回転角度が比較的大きく必要な初期トルクの大きいリクライニング機構においてもスパイラルスプリングの取付け易さを向上させることが可能である。   According to the third invention, it is possible to improve the ease of attaching the spiral spring even in a reclining mechanism having a relatively large relative rotational angle and a large initial torque.

上記第１の発明によれば、より容易にスパイラルスプリングを取付けることが可能である。
上記第２の発明によれば、他方の部材の掛止部位の先端部の強度を確保しやすい。
上記第３の発明によれば、比較的大きな初期トルクを要するリクライニング機構においてもスパイラルスプリングの取付け易さを向上させることが可能である。 According to the first aspect, it is possible to attach the spiral spring more easily.
According to the second aspect of the invention, it is easy to ensure the strength of the distal end portion of the latching portion of the other member.
According to the third aspect, it is possible to improve the ease of attaching the spiral spring even in a reclining mechanism that requires a relatively large initial torque.

以下、図面を参照しながら本発明の一実施形態について説明する。本実施形態は、自動車等の車両の室内に装備されるシートのリクライニング機構において本発明を適用した実施形態である。なお、各図において矢印で示されるＦ，Ｕは該シートの前方，上方を示している。図１には、本実施形態にかかるシートのフレーム構造１０が模式的に示されている。このシートのフレーム構造１０は、パッドが設けられて座面となるクッションフレーム１２と背凭れとなるバックフレーム１４とを備え、クッションフレーム１２とバックフレーム１４とがリクライニング機構１６を介して結合されている。リクライニング機構１６は、クッションフレーム１２に対しバックフレーム１４を回動変位させて背凭れ角度の調節を可能とするものである。リクライニング機構１６は、バックフレーム１４の回動を許容せず背凭れ角度を保持するロック状態と、バックフレーム１４の回動を許容するロック解除状態とに切り替え可能な公知のリクライニング装置（図示省略）を備えるとともに、バックフレーム１４に常時前傾方向へのバネ力を付勢するスパイラルスプリング２０を備えており、スパイラルスプリング２０のバネ力に抗してバックフレーム１４の角度を保持している前記リクライニング装置をロック解除状態とすると、バックフレーム１４はスパイラルスプリング２０のバネ力により前傾方向へ回動するようになっている。本実施形態では、リクライニング機構１６におけるスパイラルスプリングの取付構造１８に特徴を有している。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The present embodiment is an embodiment in which the present invention is applied to a seat reclining mechanism installed in a vehicle interior such as an automobile. In each figure, F and U indicated by arrows indicate the front and top of the seat. FIG. 1 schematically shows a frame structure 10 of a seat according to the present embodiment. The seat frame structure 10 includes a cushion frame 12 provided with a pad and serving as a seating surface, and a back frame 14 serving as a backrest. The cushion frame 12 and the back frame 14 are coupled via a reclining mechanism 16. Yes. The reclining mechanism 16 allows the backrest angle to be adjusted by rotationally displacing the back frame 14 with respect to the cushion frame 12. The reclining mechanism 16 is a known reclining device (not shown) that can be switched between a locked state that does not allow the back frame 14 to rotate and maintains a backrest angle, and an unlocked state that allows the back frame 14 to rotate. And the back frame 14 is provided with a spiral spring 20 that constantly urges the spring force in the forward tilt direction, and the reclining that holds the angle of the back frame 14 against the spring force of the spiral spring 20. When the device is in the unlocked state, the back frame 14 is rotated forward by the spring force of the spiral spring 20. The present embodiment is characterized by a spiral spring mounting structure 18 in the reclining mechanism 16.

図２に示されるように、スパイラルスプリング２０は帯板状の材料を渦巻状に成形したバネであり、クッションフレーム１２に対するバックフレーム１４の回動位置を中心としてフレーム構造１０の側部に配設されている。スパイラルスプリング２０の内側端部２２と外側端部３０とがクッションフレーム１２とバックフレーム１４との２部材のそれぞれに設けられたブラケット２４，３２に取付けられ、スパイラルスプリングの取付構造１８を成している。本実施形態のスパイラルスプリングの取付構造１８では、スパイラルスプリング２０の内側端部２２がクッションフレーム１２の第１のブラケット２４に相対回動不可能に取付けられており、外側端部３０がバックフレーム１４の回動に伴って変位可能にバックフレーム１４の第２のブラケット３２に取付けられている。このスパイラルスプリングの取付構造１８において、スパイラルスプリング２０はバックフレーム１４を後方へ回動させると外側端部３０が後方（巻き上げ方向Ｂ）へ回動変位させられて巻き締まり、バックフレーム１４に対する作用力が解除されると巻き戻る復元力により外側端部３０が前方（バネ作用方向Ａ）へ回動変位し、それに伴いバックフレーム１４を前傾方向へ回動させることができる。クッションフレーム１２が本発明の一方の部材に相当し、バックフレーム１４が本発明の他方の部材に相当する。   As shown in FIG. 2, the spiral spring 20 is a spring in which a strip-shaped material is formed in a spiral shape, and is disposed on the side of the frame structure 10 around the rotational position of the back frame 14 with respect to the cushion frame 12. Has been. An inner end portion 22 and an outer end portion 30 of the spiral spring 20 are attached to brackets 24 and 32 provided on the two members of the cushion frame 12 and the back frame 14, respectively. Yes. In the spiral spring mounting structure 18 of the present embodiment, the inner end 22 of the spiral spring 20 is attached to the first bracket 24 of the cushion frame 12 so as not to be relatively rotatable, and the outer end 30 is the back frame 14. It is attached to the second bracket 32 of the back frame 14 so as to be displaceable with the rotation of. In this spiral spring mounting structure 18, when the spiral spring 20 rotates the back frame 14 backward, the outer end 30 is rotationally displaced rearward (winding direction B) and tightened, thereby acting on the back frame 14. When is released, the outer end 30 is rotated and displaced forward (spring acting direction A) by the rewinding restoring force, and accordingly, the back frame 14 can be rotated forwardly. The cushion frame 12 corresponds to one member of the present invention, and the back frame 14 corresponds to the other member of the present invention.

スパイラルスプリング２０の内側端部２２は、クッションフレーム１２に一体的に設けられた第１のブラケット２４に取付けられている。第１のブラケット２４は、シート側方に突出形成された長尺な矩形の掛止部位２５を備え、該掛止部位２５に切欠部２６が形成されている。スパイラルスプリング２０の内側端部２２には係止部２２ａが折り曲げ形成されており、該係止部２２ａが切欠部２６と係り合っている。この係止部２２ａと切欠部２６との係合は、外側端部３０に巻き上げ方向Ｂの外力が作用している状態においては係合が保持され、内側端部２２は回動できない状態となっている。この係止部２２ａと切欠部２６との係合が本発明の掛止取付手段に相当する。   The inner end 22 of the spiral spring 20 is attached to a first bracket 24 that is provided integrally with the cushion frame 12. The first bracket 24 is provided with a long rectangular latching portion 25 that protrudes to the side of the seat, and a notch 26 is formed in the latching portion 25. A locking portion 22 a is bent at the inner end portion 22 of the spiral spring 20, and the locking portion 22 a is engaged with the notch portion 26. The engagement between the locking portion 22a and the cutout portion 26 is maintained in a state where an external force in the winding direction B is applied to the outer end portion 30, and the inner end portion 22 cannot rotate. ing. The engagement between the locking portion 22a and the cutout portion 26 corresponds to the latch mounting means of the present invention.

スパイラルスプリング２０の外側端部３０は、バックフレーム１４に一体的に設けられた第２のブラケット３２の掛止部位３４に取付けられている。第２のブラケット３２は細幅の板状部材がＬ字形状に屈曲成形されて固定部３３と掛止部位３４とが設けられており、固定部３３がバックフレーム１４の側面に固定され、掛止部位３４がシート側方に突出している。スパイラルスプリング２０の外側端部３０には径方向外方へ折り曲げ形成された係止巻き部３０ａが設けられている。第２のブラケット３２の掛止部位３４には、スパイラルスプリング２０の係止巻き部３０ａをバネ作用方向Ａから受け入れることのできる切欠状の係止凹部３６がスパイラルスプリング２０の帯幅方向Ｗに沿って形成されており、係止巻き部３０ａがスパイラルスプリング２０のバネ力に抗して係止凹部３６と係り合って止まっている。言い換えれば、係止巻き部３０ａが係止凹部３６に対してバネ作用方向Ａへのバネ力を作用させていることにより該係止状態が維持されている。これにより、係止巻き部３０ａには反作用として巻き上げ方向Ｂへの抗力が作用するため内側端部２２の係止部２２ａと第１のブラケット２４の切欠部２６との係合も維持される。掛止部位３４は、係止凹部３６から見て、固定部３３とは反対の先端側は先細り形状とされており、係止凹部３６から先端部３４ａにかけてシート前方に傾く傾斜形状が湾曲形状として形成され、湾曲面３８が設けられている。   The outer end 30 of the spiral spring 20 is attached to a hooking portion 34 of a second bracket 32 that is provided integrally with the back frame 14. The second bracket 32 is formed by bending a thin plate-like member into an L shape and is provided with a fixing portion 33 and a hooking portion 34. The fixing portion 33 is fixed to the side surface of the back frame 14, and is hooked. The stop part 34 protrudes to the sheet side. The outer end 30 of the spiral spring 20 is provided with a locking winding 30a that is bent outward in the radial direction. A notch-shaped locking recess 36 that can receive the locking winding portion 30 a of the spiral spring 20 from the spring acting direction A is provided in the hooking portion 34 of the second bracket 32 along the band width direction W of the spiral spring 20. The locking winding portion 30a is engaged with the locking recess 36 against the spring force of the spiral spring 20 and is stopped. In other words, the locked state is maintained because the locking winding portion 30 a applies a spring force in the spring acting direction A to the locking recess 36. As a result, a drag in the winding direction B acts as a reaction on the locking winding portion 30a, so that the engagement between the locking portion 22a of the inner end portion 22 and the notch portion 26 of the first bracket 24 is also maintained. The latching portion 34 has a tapered shape on the tip side opposite to the fixing portion 33 when viewed from the latching recess 36, and an inclined shape that inclines forward from the latching recess 36 to the tip portion 34 a is a curved shape. A curved surface 38 is formed.

スパイラルスプリング２０は、以下の手順で、予めリクライニング装置を介して回動可能に連結されたクッションフレーム１２とバックフレーム１４とに取付けることができる。
先ず、スパイラルスプリング２０の内側端部２２の係止部２２ａをクッションフレーム１２に備えられた第１のブラケット２４の切欠部２６に係合させる。次いで、図２に二点鎖線で示すように、スパイラルスプリング２０を帯幅方向Ｗに撓ませるとともに、適宜バネ力に抗して巻き上げ方向へ変位させて外側端部３０の係止巻き部３０ａをバックフレーム１４に備えられた第２のブラケット３２の掛止部位３４の先端部３４ａに係合させる。次いで、係止巻き部３０ａを掛止部位３４に沿わせて移動させるべく帯幅方向Ｗの操作力Ｘを加える。図３に模式的に示されるように、係止巻き部３０ａは掛止部位３４の先端部３４ａに係り合った状態（Ｐ１）で前記操作力Ｘを受けると湾曲面３８に沿って摺動して帯幅方向Ｗへ移動しながらバネ力に抗して巻き上げ方向Ｂへも変位する（Ｐ２）。そして、係止凹部３６の位置まで移動されると、スパイラルスプリング２０自体のバネ力により自ずと係止凹部３６に嵌り込む（Ｐ３）。それにより、係止巻き部３０ａは係止凹部３６に係止される。係止巻き部３０ａは係止凹部３６に嵌ることにより帯幅方向Ｗの位置が決定され、横滑りして掛止部位３４から脱落するのが防止される。以上の手順を経てスパイラルスプリング２０を取付けることができる。
なお、第２のブラケット３２の掛止部位３４において係止巻き部３０ａが係止凹部３６の位置まで摺動移動する摺動経路は湾曲面３８であり、該湾曲面３８が本発明のガイド構造に相当する。 The spiral spring 20 can be attached to the cushion frame 12 and the back frame 14 that are rotatably connected in advance via a reclining device in the following procedure.
First, the engaging portion 22 a of the inner end portion 22 of the spiral spring 20 is engaged with the notch portion 26 of the first bracket 24 provided in the cushion frame 12. Next, as shown by a two-dot chain line in FIG. 2, the spiral spring 20 is bent in the band width direction W, and appropriately displaced in the winding direction against the spring force, so that the locking winding portion 30 a of the outer end portion 30 is moved. The second bracket 32 provided on the back frame 14 is engaged with the front end 34 a of the latching portion 34. Next, an operating force X in the band width direction W is applied to move the locking winding portion 30 a along the hooking portion 34. As schematically shown in FIG. 3, the locking winding portion 30 a slides along the curved surface 38 when receiving the operating force X in a state (P 1) engaged with the distal end portion 34 a of the latching portion 34. While moving in the band width direction W, it is displaced in the winding direction B against the spring force (P2). And if it moves to the position of the latching recessed part 36, it will naturally fit in the latching recessed part 36 with the spring force of spiral spring 20 itself (P3). Thereby, the locking winding portion 30 a is locked to the locking recess 36. The locking winding portion 30a is fitted in the locking recess 36 to determine the position in the band width direction W, and is prevented from slipping and falling off from the hooking portion 34. The spiral spring 20 can be attached through the above procedure.
Note that the sliding path along which the locking winding portion 30a slides to the position of the locking recess 36 in the hooking portion 34 of the second bracket 32 is a curved surface 38, and the curved surface 38 is the guide structure of the present invention. It corresponds to.

以上の構成のスパイラルスプリングの取付構造１８によれば以下の作用効果を奏する。
外側端部３０の係止巻き部３０ａを掛止部位３４に沿わせて帯幅方向Ｗに移動させる一方向の操作力Ｘが加えられることにより、係止巻き部３０ａは湾曲面３８を摺動して帯幅方向Ｗへ移動させられながら、同時にバネ力に抗して巻き上げ方向Ｂへも変位させられて係止凹部３６の位置へ案内され、スパイラルスプリング２０自体のバネ力により係止凹部３６に嵌り込む。したがって、クッションフレーム１２に対するバックフレーム１４の相対回動角度が比較的大きいリクライニング機構１６においても初期トルクを付与してスパイラルスプリング２０を取付けるのが容易である。また、外側端部３０の係止巻き部３０ａを掛止部位３４に沿わせれば一方向の操作力Ｘを加えるだけで取付可能であるため、例えば、係止巻き部３０ａを指で押す簡単な操作によって取付可能とすることもできる。
また、掛止部位３４は、ガイド構造を設けるために先細り形状とされているが、湾曲面３８により先細り形状とされているため先端の強度を確保しやすい。 According to the spiral spring mounting structure 18 having the above configuration, the following operational effects are obtained.
By applying a one-way operating force X that moves the locking winding portion 30a of the outer end 30 along the hooking portion 34 in the band width direction W, the locking winding portion 30a slides on the curved surface 38. Then, while being moved in the band width direction W, it is also displaced in the winding direction B against the spring force and guided to the position of the locking recess 36, and the locking recess 36 is driven by the spring force of the spiral spring 20 itself. Fit into. Therefore, it is easy to attach the spiral spring 20 by applying the initial torque even in the reclining mechanism 16 in which the relative rotation angle of the back frame 14 with respect to the cushion frame 12 is relatively large. Moreover, since it can be attached only by applying the operation force X in one direction if the locking winding portion 30a of the outer end portion 30 is aligned with the hooking portion 34, for example, the locking winding portion 30a can be easily pushed with a finger. It can be attached by operation.
Moreover, although the latching part 34 is tapered to provide a guide structure, it is easy to ensure the strength of the tip because it is tapered by the curved surface 38.

なお、本発明は上記の実施形態に限定されず、本発明の要旨を逸脱しない範囲内でその他種々の実施形態が考えられるものである。
例えば、掛止部位３４の湾曲面３８は、直線的な傾斜形状、あるいは多段階に屈曲する傾斜形状としてもよい。
また、図４に示されるように、第２のブラケット５０は、掛止部位５２がバックフレーム１４の側方に突出するピン状であってもよい。この第２のブラケット５０の掛止部位５２は、バックフレーム１４に固定された基端側は相対的に大径の円柱状の大径円柱部５４を備え、大径円柱部５４に比して小径の円柱状の小径円柱部５６を挟んで先端側には小径円柱部５６に比して大径の略円錐形の円錐部５８が同軸で一体的に設けられて先細り形状とされている。この第２のブラケット５０では、軸方向中間の相対的に小径の小径円柱部５６が係止凹部に相当し、先端側の円錐部５８がガイド構造に相当する。図４に二点鎖線で示されるように、係止巻き部３０ａを円錐部５８の先端部５４ａに係合させ、係止巻き部３０ａを掛止部位５２に沿わせて移動させるべく帯幅方向Ｗの操作力Ｘを加えると、係止巻き部３０ａは円錐部５８の周面に沿って摺動して帯幅方向Ｗへ移動しながらバネ力に抗して巻き上げ方向Ｂへも変位する。係止巻き部３０ａが係合凹部５６の位置まで達するとバネ力で係合凹部５６に嵌り込み、該係合凹部５６と係合する。 The present invention is not limited to the above-described embodiment, and various other embodiments can be considered without departing from the gist of the present invention.
For example, the curved surface 38 of the latching portion 34 may have a linear inclined shape or an inclined shape that is bent in multiple stages.
Further, as shown in FIG. 4, the second bracket 50 may have a pin shape in which the hooking portion 52 protrudes to the side of the back frame 14. The hooking portion 52 of the second bracket 50 includes a large-diameter columnar portion 54 having a relatively large diameter on the base end side fixed to the back frame 14, as compared with the large-diameter columnar portion 54. A substantially conical conical portion 58 having a larger diameter than that of the small-diameter cylindrical portion 56 is provided coaxially and integrally on the distal end side with the small-diameter cylindrical small-diameter cylindrical portion 56 interposed therebetween, and has a tapered shape. In the second bracket 50, the relatively small-diameter cylindrical portion 56 in the middle in the axial direction corresponds to a locking recess, and the conical portion 58 on the tip side corresponds to a guide structure. As indicated by a two-dot chain line in FIG. 4, the engagement winding portion 30 a is engaged with the distal end portion 54 a of the conical portion 58, and the engagement winding portion 30 a is moved along the hooking portion 52 in the band width direction. When the operating force X of W is applied, the locking winding portion 30a slides along the circumferential surface of the conical portion 58 and moves in the band width direction W, and is also displaced in the winding direction B against the spring force. When the locking winding portion 30 a reaches the position of the engagement recess 56, the engagement winding portion 30 a is fitted into the engagement recess 56 by the spring force and is engaged with the engagement recess 56.

また、スパイラルスプリング２０の係止巻き部３０ａを掛止部位３４に沿って帯幅方向Ｗに移動させて係止凹部３６へ案内するにあたり、係止巻き部３０ａを巻き上げ方向Ｂに変位させることのできるガイド構造は、係止巻き部３０ａに設けてもよい。すなわち、係止巻き部３０ａの形状を帯幅方向Ｗに対して傾け、係止凹部３６への移動方向が巻き上げ方向Ｂに傾いた傾斜形状とすることによりガイド構造を形成することができる。   Further, when the locking winding portion 30a of the spiral spring 20 is moved in the band width direction W along the hooking portion 34 and guided to the locking recess 36, the locking winding portion 30a is displaced in the winding direction B. The possible guide structure may be provided in the locking winding portion 30a. That is, the guide structure can be formed by inclining the shape of the locking winding portion 30a with respect to the band width direction W and making the moving direction to the locking recess 36 inclined in the winding direction B.

また、本発明のスパイラルスプリングの取付構造は、リクライニング機構１６に限らず、シートの可動部分を操作する際の補助ばねとして、シートの様々な部分に適用することができる。   Further, the spiral spring mounting structure of the present invention is not limited to the reclining mechanism 16 and can be applied to various parts of the seat as an auxiliary spring when operating the movable part of the seat.

本発明の実施形態に係るシートのフレーム構造を示す側面図である。It is a side view which shows the frame structure of the sheet | seat which concerns on embodiment of this invention. 本発明の実施形態に係るスパイラルスプリングの取付構造の斜視図である。It is a perspective view of the attachment structure of the spiral spring which concerns on embodiment of this invention. 図２に示されるスパイラルスプリングの取付過程を説明する平面図である。It is a top view explaining the attachment process of the spiral spring shown by FIG. 本発明の変形例に係るスパイラルスプリングの取付構造の斜視図である。It is a perspective view of the attachment structure of the spiral spring which concerns on the modification of this invention. 従来のスパイラルスプリングの取付構造の斜視図である。It is a perspective view of the attachment structure of the conventional spiral spring.

符号の説明Explanation of symbols

１２ クッションフレーム
１４ バックフレーム
１６ リクライニング機構
１８ スパイラルスプリングの取付構造
２０ スパイラルスプリング
２２ 内側端部
２２ａ 係止部
２４ 第１のブラケット
２５ 掛止部位
２６ 切欠部
３０ 外側端部
３０ａ 係止巻き部
３２ 第２のブラケット
３４ 掛止部位
３４ａ 先端部
３６ 係止凹部
３８ 湾曲面（ガイド構造）
５０ 第２のブラケット
５２ 掛止部位
５４ａ 先端部
５４ 大径円柱部
５６ 係合凹部（小径円柱部）
５８ 円錐部（ガイド構造）
Ａ バネ作用方向
Ｂ 巻き上げ方向
Ｗ 帯幅方向
Ｘ 操作力
12 Cushion frame 14 Back frame 16 Reclining mechanism 18 Spiral spring mounting structure 20 Spiral spring 22 Inner end portion 22a Locking portion 24 First bracket 25 Hooking portion 26 Notch portion 30 Outer end portion 30a Locking winding portion 32 Second Bracket 34 latching part 34a tip 36 locking recess 38 curved surface (guide structure)
50 Second bracket 52 Engagement part 54a Tip part 54 Large diameter cylindrical part 56 Engaging recess (small diameter cylindrical part)
58 Cone (guide structure)
A Spring direction B Winding direction W Band width direction X Operating force

Claims (3)

車両用シートに備えられ、相対的に回動変位可能に配設された２部材間に、該２部材に対し相対回動方向のバネ力を付勢するように配設される帯板状のスパイラルスプリングの前記２部材への取付構造であって、
前記スパイラルスプリングの内側端部は前記２部材の一方の部材の掛止部位に取付けられ、
前記スパイラルスプリングの外側端部は前記２部材の他方の部材の掛止部位に取付けられ、前記スパイラルスプリングの外側端部には径方向外方へ折り曲げ形成された係止巻き部が設けられており、前記他方の部材の掛止部位には前記係止巻き部を前記スパイラルスプリングのバネ作用方向から受け入れて帯幅方向の位置決めを行う係止凹部が帯板状のスパイラルスプリングの帯幅方向に沿って形成されており、前記スパイラルスプリングの外側端部は、前記係止巻き部を前記他方の部材の掛止部位に沿って帯幅方向に移動させて前記係止凹部へ案内するガイド構造により前記他の部材の掛止部位に取付けられ、
該ガイド構造は、前記スパイラルスプリングの外側端部に形成された係止巻き部と、前記他方の部材の掛止部位における前記係止巻き部が前記係止凹部の位置まで摺動する摺動経路との少なくとも一方が、前記係止巻き部の前記係止凹部への帯幅方向の移動の際に前記スパイラルスプリングが巻き上げ方向となる傾斜形状に形成されていることを特徴とする車両用シートのスパイラルスプリングの取付構造。 A belt plate-like member provided in a vehicle seat and disposed between two members disposed so as to be relatively rotatable and displaceable so as to bias a spring force in a relative rotating direction against the two members. A structure for attaching the spiral spring to the two members,
The inner end of the spiral spring is attached to the hooking portion of one of the two members,
The outer end portion of the spiral spring is attached to the hooking portion of the other member of the two members, and the outer end portion of the spiral spring is provided with a locking winding portion bent outward in the radial direction. A locking recess for receiving the locking winding portion from the spring acting direction of the spiral spring and positioning in the band width direction is provided along the band width direction of the band plate-shaped spiral spring at the latching portion of the other member. The outer end portion of the spiral spring is formed by a guide structure that guides the locking winding portion in the band width direction along the hooking portion of the other member to guide the locking recess. It is attached to the latching part of other members,
The guide structure includes a locking winding formed at an outer end of the spiral spring, and a sliding path through which the locking winding at the hooking portion of the other member slides to the locking recess. Is formed in an inclined shape in which the spiral spring is in the winding direction when the locking winding portion moves in the band width direction to the locking recess. Spiral spring mounting structure. 請求項１に記載の車両用シートのスパイラルスプリングの取付構造であって、
前記他方の部材の掛止部位における前記係止巻き部が前記係止凹部の位置まで摺動する摺動経路が、前記係止巻き部の前記係止凹部への帯幅方向の移動の際に前記スパイラルスプリングが巻き上げ方向となる傾斜形状に形成されており、該傾斜形状は湾曲形状として形成されていることを特徴とする車両用シートのスプリングスパイラルの取付構造。 The vehicle seat spiral spring mounting structure according to claim 1,
The sliding path along which the locking winding portion at the latching portion of the other member slides to the position of the locking recess is moved in the band width direction of the locking winding portion to the locking recess. A spring spiral mounting structure for a vehicle seat, wherein the spiral spring is formed in an inclined shape in a winding direction, and the inclined shape is formed in a curved shape. 請求項１または請求項２に記載の車両用シートのスパイラルスプリングの取付構造であって、
前記２部材はシートクッションとシートバックとであり、前記スパイラルスプリングのバネ力は前記シートバックのリクライニング機構を構成することを特徴とする車両用シートのスパイラルスプリングの取付構造。
A mounting structure for a spiral spring of a vehicle seat according to claim 1 or 2,
The two members are a seat cushion and a seat back, and the spring force of the spiral spring constitutes a reclining mechanism of the seat back.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016027567A1 (en) * 2014-08-21 2016-02-25 株式会社タチエス Method and device for manufacture of seat for vehicle
KR20230090696A (en) * 2021-12-15 2023-06-22 주식회사다스 Seat back return assistant device for vehicle

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JPS596641U (en) * 1982-07-05 1984-01-17 ソニー株式会社 Torsion coil spring mounting structure
JP2007082919A (en) * 2005-09-26 2007-04-05 Shiroki Corp Seat
JP2008054712A (en) * 2006-08-29 2008-03-13 Shiroki Corp Seat

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS596641U (en) * 1982-07-05 1984-01-17 ソニー株式会社 Torsion coil spring mounting structure
JP2007082919A (en) * 2005-09-26 2007-04-05 Shiroki Corp Seat
JP2008054712A (en) * 2006-08-29 2008-03-13 Shiroki Corp Seat

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016027567A1 (en) * 2014-08-21 2016-02-25 株式会社タチエス Method and device for manufacture of seat for vehicle
JP2016042969A (en) * 2014-08-21 2016-04-04 株式会社タチエス Vehicular seat manufacturing method and manufacturing device
ES2604680R1 (en) * 2014-08-21 2018-05-04 Tachi-S Co., Ltd. Method and device for manufacturing a seat for a vehicle
KR20230090696A (en) * 2021-12-15 2023-06-22 주식회사다스 Seat back return assistant device for vehicle
KR102644382B1 (en) * 2021-12-15 2024-03-08 주식회사 다스 Seat back return assistant device for vehicle

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