JP5551401B2

JP5551401B2 - Slide structure for vehicle seat

Info

Publication number: JP5551401B2
Application number: JP2009231300A
Authority: JP
Inventors: 誠樽澤; 幾世紀梅▲崎▼
Original assignee: Delta Kogyo Co Ltd
Current assignee: Delta Kogyo Co Ltd
Priority date: 2009-10-05
Filing date: 2009-10-05
Publication date: 2014-07-16
Anticipated expiration: 2029-10-05
Also published as: JP2011079369A

Description

本発明は、自動車等の車両用シートのスライド構造に関するものである。 The present invention relates to a slide structure for a vehicle seat such as an automobile.

従来から、車両用シートのスライド構造は知られており、例えば特許文献１に提案されたものがある。この特許文献１に記載のものは、ロアレールに回転不能に固定されたスクリューロッド（ねじ棒）と、スクリューロッドと螺合したナット部材と、アッパレールに固定されナット部材を保持した保持部材（ブラケット）とを備えている。又、このナット部材には、減速手段が設けられている。この減速手段は、ナット部材の外周に形成されたウォームホイール部と、そのウォームホイール部に噛合したウォームとから構成されている。又、ナット部材とウォームとは、夫々、それらを四方から囲むギアボックスに回転自在に組みつけられることにより、ウォームとウォームホイール部とを噛合状態とし、その噛合状態に組みつけたギアボックスを介して保持部材に保持されている。そして、ウォームに回転伝達可能に連結されたモータの作動に伴いウォーム、ウォームホイール部を介してナット部材が減速しながら回転し得るようになっている。 Conventionally, a slide structure of a vehicle seat is known, and for example, there is one proposed in Patent Document 1. The one described in Patent Document 1 includes a screw rod (screw rod) fixed to the lower rail so as not to rotate, a nut member screwed to the screw rod, and a holding member (bracket) fixed to the upper rail and holding the nut member. And. The nut member is provided with a speed reduction means. The speed reduction means is composed of a worm wheel portion formed on the outer periphery of the nut member and a worm meshed with the worm wheel portion. In addition, the nut member and the worm are rotatably assembled to a gear box that surrounds the nut member and the worm, respectively, so that the worm and the worm wheel portion are engaged with each other via a gear box assembled in the engaged state. Is held by the holding member. The nut member can be rotated while being decelerated through the worm and the worm wheel portion in accordance with the operation of the motor coupled to the worm so as to be able to transmit the rotation.

特開２００４−１０６７１３号公報JP 2004-106713 A

ところで、ナット部材がスクリューロッドの軸方向に相対移動するに際して、両者の製作誤差やスクリューロッドの歪等のために、ナット部材をアッパレールに対して多少、径方向に移動ができるようにしておかなければナット部材がスクリューロッドの軸方向に円滑に相対移動できない。そのため、上記特許文献１に記載のものにおいて、アッパレールに固定した保持部材に対して上記径方向に移動可能なギヤボックスを介して保持部材にナット部材を保持させている。 By the way, when the nut member moves relative to the axial direction of the screw rod, the nut member should be able to move somewhat in the radial direction with respect to the upper rail due to manufacturing errors between them and distortion of the screw rod. Thus, the nut member cannot smoothly move relative to the axial direction of the screw rod. Therefore, in the thing of the said patent document 1, the nut member is hold | maintained at the holding member via the gear box movable to the said radial direction with respect to the holding member fixed to the upper rail.

しかし、このようなギヤボックスを設けたのでは部品点数が多くなるとともに、コスト高になり、又、保持部材をギヤボックスを収納するだけのスペースを確保しなければならず、保持部材をコンパクトにしてロアレール及びアッパレール全体のコンパクト化を図り難い。 However, the provision of such a gear box increases the number of parts and the cost, and requires a space for the holding member to accommodate the gear box, which makes the holding member compact. Therefore, it is difficult to make the entire lower rail and upper rail compact.

また、ギアボックスを、ナット部材の外周に形成したウォームホイール部とウォームとを噛合状態に維持できるように、ナット部材とウォームとの夫々を回転自在に組みつけなければならないため、ある程度の強度を持たせるとともに、精度良く形成しなければならず、製作コストが高くつく。 In addition, the nut member and the worm must be rotatably assembled so that the worm wheel portion formed on the outer periphery of the nut member and the worm can be kept in mesh with each other. It must be formed with high precision and the manufacturing cost is high.

本発明は、ナット部材を保持部材に直接、回転自在に保持でき、保持部材をコンパクトにしてロアレール及びアッパレールのコンパクト化を図り得る車両用シートのスライド構造の提供を目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle seat slide structure in which a nut member can be directly and rotatably held on a holding member, and the holding member can be made compact so that the lower rail and the upper rail can be made compact.

上記課題を解決するため、請求項１の発明は、車体に固定されたロアレールとシートに固定されたアッパレールとのいずれか一方のレールに設けられたスクリューロッドに螺合されたナット部材を、前記いずれか他方のレールに設けられた保持部材によって保持させ、そのナット部材を駆動手段によって回転駆動させることにより、前記シートを前記車体の前後方向に移動可能とした車両用シートのスライド構造であって、前記ナット部材には、減速手段が設けられ、前記減速手段は、前記ナット部材の外周に形成されたウォームホイール部と、そのウォームホイール部と噛合するとともに、前記駆動手段と回転伝達可能に接続されたウォームとを備え、前記ウォームは、ウォーム支持部材によって回転自在に支持され、前記ウォーム支持部材は、保持用突片を備え、前記保持部材は、前記ナット部材を回転自在に保持するナット保持孔と、前記ウォームホイール部と前記ウォームとが噛合状態を維持し得るように前記ウォーム支持部材の保持用突片を移動不能に保持する凹部状の突片保持部を備え、前記いずれか他方のレールは、前記保持部材を係止するための係止用孔を備え、前記保持部材は、弾性を有するものから構成されているとともに、前後方向に距離を持って対向配置された第１係止部及び第２係止部とを備え、前記弾性に抗して前記距離が狭められることにより、前記第１係止部と第２係止部とが前記係止用孔に入り込み可能となって、前記ナット部材が前記ナット保持孔に回転自在に保持されるとともに、前記ウォーム支持部材の保持用突片が前記突片保持部に入り込んで前記保持部材に保持され、前記弾性によって、前記距離を広げて前記係止用孔に入り込んだ前記第１係止部と第２係止部とが前記係止用孔を区画形成した内側面を押圧して係止できるように構成されていることを特徴とする車両用シートのスライド構造である。 In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that a nut member screwed into a screw rod provided on one of a lower rail fixed to a vehicle body and an upper rail fixed to a seat is A vehicle seat slide structure in which the seat is movable in the front-rear direction of the vehicle body by being held by a holding member provided on one of the other rails and rotating the nut member by driving means. The nut member is provided with a speed reduction means, and the speed reduction means meshes with the worm wheel portion formed on the outer periphery of the nut member and is connected to the drive means so as to be able to transmit rotation. is provided with a worm, the worm is rotatably supported by the worm support member, the worm supporting portion Is provided with a retaining projection piece, the holding member includes a nut holding hole for rotatably holding the nut member, wherein the worm wheel portion and said worm of the worm support member so as to maintain the meshed state A protrusion-shaped holding part for holding the holding protrusion is made immovable. The other rail has a locking hole for locking the holding member, and the holding member is elastic. A first locking portion and a second locking portion that are arranged opposite to each other with a distance in the front-rear direction, and the distance is reduced against the elasticity, The first locking portion and the second locking portion can enter the locking hole, the nut member is rotatably held in the nut holding hole, and the worm support member is held. The protruding piece enters the protruding piece holding part. The first locking portion and the second locking portion which are inserted into the locking hole by expanding the distance due to the elasticity, and are formed in the locking hole. The vehicle seat slide structure is configured to press and lock the side surface .

請求項２のように、前記いずれか他方のレールは、その幅方向の両側夫々に互いに対向配置された第１壁及び第２壁と、それらを連結した第３壁とを備え、前記係止用孔は、前記第３壁に設けられ、前記保持部材は、前後方向に距離を持って対向配置された板状の弾性を有する第１保持片及び第２保持片と、それらの基端側を連結した板状の弾性を有する連結片とを備え、前記ナット部材とウォーム支持部材とは、前記第１保持片と第２保持片との間に配設されているとともに、それらの第１保持片と第２保持片とに保持され、前記第１係止部は、前記第１保持片の先端側に、第２係止部は第２保持片の先端側に、夫々、設けられ、前記第１保持片と第２保持片とには、夫々、その幅方向の両端夫々に幅方向に突設された突片が、更に設けられ、前記第１壁と第２壁とは、夫々、前記係止部夫々が係止用孔に入り込むに際して、前記突片夫々が入り込み可能に形成された突片挿入用孔を備えていることが好ましい。 As claim 2, wherein the other one of the rails comprises a first wall and a second wall arranged opposite each other people on both sides respectively in the width direction, and a third wall connecting them, said locking The hole is provided in the third wall, and the holding member has plate-like elastic first holding pieces and second holding pieces that are arranged to face each other with a distance in the front-rear direction, and their proximal ends. And the nut member and the worm support member are disposed between the first holding piece and the second holding piece, and the first of them. Held by a holding piece and a second holding piece, the first locking portion is provided on the tip side of the first holding piece, and the second locking portion is provided on the tip side of the second holding piece, Each of the first holding piece and the second holding piece is further provided with a protruding piece protruding in the width direction at each of both ends in the width direction. The first wall and the second wall each include a protruding piece insertion hole formed so that each of the protruding pieces can enter when each of the engaging portions enters the engaging hole. preferable.

本発明の請求項１によれば、ウォームは、ウォーム支持部材によって回転可能に保持される。又、保持部材は、ナット部材を回動自在に保持するとともに、ウォームホイール部とウォームとが噛合状態を維持し得るようにウォーム支持部材を保持している。 According to claim 1 of the present invention, the worm is rotatably held by the worm support member. In addition, the holding member holds the nut member rotatably, and holds the worm support member so that the worm wheel portion and the worm can maintain the meshing state.

これにより、保持部材にウォーム支持部材を保持させれば、ウォームとウォームホイール部とを位置合わせでき、両者を噛合状態にできる。又、ウォーム支持部材を保持した保持部材を、ロアレール又はアッパレールに組み付ければ、ウォームとウォームホイール部とを噛合した状態でロアレール又はアッパレールに装着できる。 Accordingly, if the worm support member is held by the holding member, the worm and the worm wheel portion can be aligned, and both can be brought into meshing state. Further, if the holding member holding the worm support member is assembled to the lower rail or the upper rail, it can be attached to the lower rail or the upper rail in a state where the worm and the worm wheel portion are engaged with each other.

従って、従来のように、ウォームとナット部材とを組み付けるギアボックスを不要にでき、保持部材をコンパクトにしてロアレール及びアッパレール全体のコンパクト化を図ることができるとともに、製作コストを低く抑えることができる。 Therefore, the conventional gear box for assembling the worm and the nut member can be eliminated, the holding member can be made compact and the entire lower rail and upper rail can be made compact, and the manufacturing cost can be kept low.

又、保持部材は、弾性を有するものから構成されているとともに、対向配置された第１係止部と第２係止部とを備えている。そして、これらの第１係止部と第２係止部とは、弾性に抗して互いの距離が狭められることにより係止用孔に入り込み可能とされているとともに、弾性によって、その距離を広げて係止用孔を区画形成した内側面を押圧して係止できるように構成されている。 The holding member is made of a material having elasticity, and includes a first locking portion and a second locking portion arranged to face each other. And these 1st latching | locking parts and 2nd latching | locking part can be penetrated into the hole for latching by the mutual distance being narrowed against elasticity, and the distance is made by elasticity. It is configured to be able to press and lock the inner side surface in which the locking holes are expanded and partitioned.

これにより、例えば保持部材の第１係止部と第２係止部とを、互いの距離を狭めるように力を付与して係止用孔に入れれば、保持部材の弾性によって第１係止部と第２係止部とをロアレール又はアッパレールに係止させ、保持部材をロアレール又はアッパレールに組み付けできる。 Accordingly, for example, if the first locking portion and the second locking portion of the holding member are applied to the locking hole by applying a force so as to reduce the distance between them, the first locking portion is caused by the elasticity of the holding member. The holding member can be assembled to the lower rail or the upper rail by locking the portion and the second locking portion to the lower rail or the upper rail.

従って、保持部材をロアレール又はアッパレールに容易に組み付けうるとともに、それらに組み付けるためのボルト又はピン等の固定部材を不要にできる。しかも、復元力によって組み付けるため、振動等を受けた場合でもガタつくことのないものにでき、例えばボルトで固定した場合のように振動等を受けた場合に緩んでガタつくようなことを防止できる。 Therefore, the holding member can be easily assembled to the lower rail or the upper rail, and a fixing member such as a bolt or a pin for assembling them can be eliminated. Moreover, since it is assembled by the restoring force, it can be prevented from rattling even when subjected to vibration, etc. For example, it can be prevented from loosening and rattling when subjected to vibration, such as when it is fixed with a bolt. .

又、保持部材を、ロアレール又はアッパレールの係止用孔に入れて保持部材の弾性力によって係止しているため、保持部材でナット部材を直接的に相対移動不能に保持しておいても、ナット部材のスクリューロッドの径方向への移動に伴い保持部材が係止用孔を区画形成した内側面をすべり動くことができる。従って、保持部材でナット部材を直接的に相対移動不能に保持することができ、ナット部材から保持部材への力の伝達効率の良いものにできる。 Moreover, since the holding member is put in the lower rail or the upper rail locking hole and locked by the elastic force of the holding member, even if the holding member holds the nut member directly incapable of relative movement, With the movement of the nut member in the radial direction of the screw rod, the holding member can slide on the inner surface on which the locking hole is formed. Therefore, the nut member can be directly held in a relatively non-movable state by the holding member, and the force transmission efficiency from the nut member to the holding member can be improved.

請求項２によれば、第１係止部と第２係止部とは、保持部材の第１保持片と第２保持片との夫々の先端側に設けられ、又、第１保持片と第２保持片とには、夫々、幅方向の両端夫々に幅方向に突設された突片が設けられている。そして、ロアレール又はアッパレールの第１壁と第２壁とは、夫々、係止部夫々が係止用孔に入り込むに際して、突片夫々が入り込み可能に形成された突片挿入用孔を備えている。 According to claim 2 , the first locking portion and the second locking portion are provided on the respective distal end sides of the first holding piece and the second holding piece of the holding member, and the first holding piece and Each of the second holding pieces is provided with a protruding piece protruding in the width direction at each of both ends in the width direction. The first wall and the second wall of the lower rail or the upper rail each have a protruding piece insertion hole formed so that each protruding piece can enter when each engaging portion enters the engaging hole. .

これにより、突片夫々と突片挿入用孔の内側面とを対向させることができる。従って、例えばアッパレールにロアレールに対する前後方向の力がかかって保持部材がナット部材から反力を受けた場合、それらの対向した突片夫々と突片挿入用孔の内側面とを当接させることができ、反力を受けた保持部材をその内側面で支えることができる。よって、保持部材を変形し難くでき、保持部材を、例えば板厚が薄いコンパクトなものから構成することも可能になる。 Thereby, each protrusion can be made to oppose the inner surface of the protrusion insertion hole. Therefore, for example, when a force in the front-rear direction is applied to the upper rail and the holding member receives a reaction force from the nut member, the opposed projecting pieces can be brought into contact with the inner surface of the projecting piece insertion hole. The holding member that has received the reaction force can be supported on the inner surface thereof. Therefore, it is possible to make the holding member difficult to deform, and it is possible to configure the holding member from a compact one having a thin plate thickness, for example.

又、その際、突片挿入用孔は、夫々、第１保持片と第２保持片との係止部の夫々が係止用孔に入り込むに際して、突片夫々が入り込み得るように構成されているため、突片挿入用孔に突片を入れる操作を容易なものにできる。 Further, at that time, each of the protruding piece insertion holes is configured such that each protruding piece can enter when each of the locking portions of the first holding piece and the second holding piece enters the locking hole. Therefore, the operation of inserting the protruding piece into the protruding piece insertion hole can be facilitated.

本発明の一実施の形態の自動車用シートのスライド構造の斜視図である。1 is a perspective view of a slide structure for an automobile seat according to an embodiment of the present invention. 図１の自動車用シートのスライド構造の分解斜視図である。It is a disassembled perspective view of the slide structure of the vehicle seat of FIG. 保持部材とナット部材とウォームとの分解斜視図である。It is a disassembled perspective view of a holding member, a nut member, and a worm. 図１の自動車用シートのスライド構造の側面図である。It is a side view of the slide structure of the vehicle seat of FIG. 図４のＶ−Ｖ線端面図である。It is the VV line end view of FIG. 図４のＶＩ−ＶＩ線端面図である。It is the VI-VI line end view of FIG. 保持部材にナット部材及びウォーム支持部材を保持させる際の説明図である。It is explanatory drawing at the time of making a holding member hold | maintain a nut member and a worm | warm support member. 図７の状態から、保持部材の前保持片と後保持片との距離を狭めてナット部材及びウォーム支持部材を保持した状態の説明図である。It is explanatory drawing of the state which narrowed the distance of the front holding piece and rear holding piece of a holding member from the state of FIG. 7, and hold | maintained the nut member and the worm | warm support member. ナット部材及びウォーム支持部材を保持した保持部材を、アッパレールに組み付ける際の説明図である。It is explanatory drawing at the time of attaching the holding member holding the nut member and the worm support member to an upper rail. ナット部材及びウォーム支持部材を保持した保持部材を、アッパレールに組み付けた状態の説明図である。It is explanatory drawing of the state which assembled | attached the holding member holding the nut member and the worm | warm support member to the upper rail. ナット部材及びウォーム支持部材を保持した保持部材をアッパレールに組み付けた状態の要部の側面図である。It is a side view of the principal part of the state which attached the holding member holding the nut member and the worm support member to the upper rail. 突片挿入用孔及び突片を設けていない比較例の説明図である。It is explanatory drawing of the comparative example which is not providing the protrusion piece insertion hole and the protrusion piece. 他の実施形態の突片挿入用孔が設けられたアッパレールの要部の側面図である。It is a side view of the principal part of the upper rail provided with the protrusion piece insertion hole of other embodiment. 図１３の他の実施形態の突片挿入用孔に突片が入り込んだ状態のアッパレールの要部の側面図である。FIG. 14 is a side view of a main part of the upper rail in a state in which a protruding piece enters the protruding piece insertion hole of another embodiment of FIG. 13.

以下、本発明を実施するための最良の形態について、図面を参照しながら詳細に説明する。図１は、本発明の一実施の形態の自動車用シートのスライド構造の斜視図、図２は、図１の自動車用シートのスライド構造の分解斜視図、図３は、保持部材とナット部材とウォームとの分解斜視図、図４は、図１の自動車用シートのスライド構造の側面図である。又、図５は、図４のＶ−Ｖ線端面図、図６は、図４のＶＩ−ＶＩ線端面図である。尚、図中のＸ方向を前方側、Ｙ方向を後方側とし、又、Ｚ方向を左方側、Ｗ方向を右方側として説明する。 Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. 1 is a perspective view of a slide structure for an automobile seat according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the slide structure for an automobile seat in FIG. 1, and FIG. FIG. 4 is a side view of the slide structure of the automobile seat in FIG. 5 is an end view taken along line VV in FIG. 4, and FIG. 6 is an end view taken along line VI-VI in FIG. In the drawing, the X direction is the front side, the Y direction is the rear side, the Z direction is the left side, and the W direction is the right side.

この実施形態の車両用シートとしての自動車用シートのスライド構造は、図１〜図６に示すように、長尺状のロアレール１と、長尺状のアッパレール２と、長尺状のスクリューロッド３と、スクリューロッド３と螺合するナット部材４と、減速手段と、ナット部材４を保持した保持部材５とを備えている。 As shown in FIG. 1 to FIG. 6, the slide structure of the automobile seat as the vehicle seat of this embodiment includes a long lower rail 1, a long upper rail 2, and a long screw rod 3. And a nut member 4 screwed into the screw rod 3, a speed reduction means, and a holding member 5 holding the nut member 4.

ロアレール１は、第１壁としての右側壁１２と、第２壁としての左側壁１３と、それらの右側壁１２と左側壁１３とを連結した第３壁としての下壁１４とを備えている。 The lower rail 1 includes a right side wall 12 as a first wall, a left side wall 13 as a second wall, and a lower wall 14 as a third wall connecting the right side wall 12 and the left side wall 13. .

この実施形態では、右側壁１２と左側壁１３とは、下壁１４の幅方向の両端夫々から上方に折り曲げ成形されて互いに左右に対向配置されている。 In this embodiment, the right side wall 12 and the left side wall 13 are bent upward from both ends in the width direction of the lower wall 14 and are arranged opposite to each other on the left and right.

又、この実施形態では、右側壁１２及び左側壁１３には、夫々、上端から内側に折り返された折り返し片１５が設けられたものとされている。 In this embodiment, the right side wall 12 and the left side wall 13 are each provided with a folded piece 15 that is folded inward from the upper end.

このように構成されたロアレール１は、長手方向を前後方向に沿わすように配設されて、下壁１１が自動車の床面にボルト等の固定手段によって固定される。 The lower rail 1 configured as described above is disposed so that the longitudinal direction thereof extends in the front-rear direction, and the lower wall 11 is fixed to a floor surface of the automobile by a fixing means such as a bolt.

アッパレール２は、互いに対向する第１壁としての右側壁２２及び第２壁としての左側壁２３と、それらの右側壁２２と左側壁２３とを連結した第３壁としての上壁２４とを備えている。 The upper rail 2 includes a right side wall 22 as a first wall and a left side wall 23 as a second wall facing each other, and an upper wall 24 as a third wall connecting the right side wall 22 and the left side wall 23. ing.

右側壁２２と左側壁２３とは、この実施形態では、上壁２４の幅方向の両端夫々から下方に折り曲げ成形されて互いに左右に対向配置されているとともに、これらの右側壁２２及び左側壁２３には、夫々、外側に折り返された折り返し片２５が設けられたものとされている。 In this embodiment, the right side wall 22 and the left side wall 23 are bent downward from both ends in the width direction of the upper wall 24 and are disposed opposite to each other on the left and right sides. Each is provided with a folded piece 25 folded outward.

従って、この実施形態のアッパレール２は、右側壁２２と左側壁２３と上壁２４とによって下方側が開口されるように形成された断面コの字状のレール本体部と折り返し片２５とを備えたものとされている。 Accordingly, the upper rail 2 of this embodiment includes a rail body portion having a U-shaped cross section and a folded piece 25 formed so that the lower side is opened by the right side wall 22, the left side wall 23, and the upper wall 24. It is supposed to be.

又、上壁２１には、係止用孔２６が穿設されている。この実施形態の係止用孔２６は、前後の両内側面２６ａ、２６ｂと左右の両内側面とで四角形状に区画形成されている。 Further, a locking hole 26 is formed in the upper wall 21. The locking hole 26 of this embodiment is partitioned and formed in a quadrangular shape by the front and rear inner surfaces 26a and 26b and the left and right inner surfaces.

又、右側壁２２及び左側壁２３には、夫々、上下方向に延ばされたスリット状の前突片挿入用孔２７及び後突片挿入用孔２８の２つの突片挿入用孔が穿設されている。 The right wall 22 and the left wall 23 are respectively provided with two protrusion insertion holes, a slit-shaped front protrusion insertion hole 27 and a rear protrusion insertion hole 28 extending in the vertical direction. Has been.

また、この実施形態では、図１１に示すように、前突片挿入用孔２７を区画形成した前内側面２９と、後突片挿入用孔２８を区画形成した後内側面３０との距離Ｌ４は、上記係止用孔２６を区画形成した前内側面２６ａと後内側面２６ｂとの距離Ｌ３と略同じに設定されている。 In this embodiment, as shown in FIG. 11, the distance L4 between the front inner side surface 29 in which the front protrusion piece insertion hole 27 is partitioned and the rear inner side surface 30 in which the rear protrusion piece insertion hole 28 is partitioned. Is set to be substantially the same as the distance L3 between the front inner side surface 26a and the rear inner side surface 26b in which the locking holes 26 are defined.

そして、このように構成されたアッパレール２は、自動車のシート（図示しない）に、上壁２４を上側にして長手方向を前後方向に沿わすように配設されてボルト等の固定手段によって固定されているとともに、ロアレール１の内側に、長手方向に沿って摺動可能に配設される。 The upper rail 2 configured as described above is disposed on an automobile seat (not shown) so that the upper wall 24 is on the upper side and the longitudinal direction is along the front-rear direction, and is fixed by fixing means such as bolts. And is slidably disposed along the longitudinal direction inside the lower rail 1.

スクリューロッド３は、図１、図２に示すように、外周に、軸方向のほぼ全長に渡って雄ネジ３１が形成されている。そして、スクリューロッド３は、その軸方向をロアレール５の長手方向に沿わすようにしてロアレール１の右側壁２２と左側壁２３との間に配設され、その軸方向の両端夫々が、取付部材３２によって、ロアレール１に固定状態に取り付けられている。 As shown in FIGS. 1 and 2, the screw rod 3 is formed with a male screw 31 on the outer periphery over almost the entire length in the axial direction. And the screw rod 3 is arrange | positioned between the right side wall 22 and the left side wall 23 of the lower rail 1 so that the axial direction may be along with the longitudinal direction of the lower rail 5, and each both ends of the axial direction are attachment members. 32 is fixedly attached to the lower rail 1.

ナット部材４は、この実施形態では、図３に示すように円筒状のものから構成されている。ナット部材４の内周には、スクリューロッド３の雄ネジ３１に螺合する雌ネジ４１が形成されている。 In this embodiment, the nut member 4 is formed in a cylindrical shape as shown in FIG. On the inner periphery of the nut member 4, a female screw 41 that is screwed into the male screw 31 of the screw rod 3 is formed.

減速手段は、ナット部材４の外周に形成されたウォームホイール部４２と、ウォームホイール部４２に噛合したウォーム４３とから構成されている。このウォーム４３は、図示しない駆動手段としてのモータ及び図示しない連結軸を介して回転伝達可能に接続されており、モータの作動に伴い回転するようになっている。そして、ウォーム４３とウォームホイール部４２とは、モータの回転に基づいて、ナット部材４を減速させつつ回転させる。 The speed reduction means is composed of a worm wheel portion 42 formed on the outer periphery of the nut member 4 and a worm 43 meshed with the worm wheel portion 42. The worm 43 is connected so as to be able to transmit rotation via a motor (not shown) as a driving means and a connecting shaft (not shown), and rotates with the operation of the motor. The worm 43 and the worm wheel portion 42 rotate the nut member 4 while decelerating based on the rotation of the motor.

又、ウォーム４３は、ウォーム支持部材４４によって回転自在に支持されている。この実施形態のウォーム支持部材４４は、合成樹脂から構成され、下方側が開口された略半円筒状を呈している。そして、ウォーム支持部材４４は、ウォーム４３の上部側を覆い、ウォーム４３の下方側を露出させた状態で、ウォーム４３の軸部をウォーム支持用ブッシュ４４ａを介して回転自在に支持する。 The worm 43 is rotatably supported by a worm support member 44. The worm support member 44 of this embodiment is made of synthetic resin and has a substantially semi-cylindrical shape with an opening on the lower side. The worm support member 44 covers the upper side of the worm 43 and rotatably supports the shaft portion of the worm 43 via the worm support bush 44a with the lower side of the worm 43 exposed.

又、ウォーム支持部材４４は、前後両端夫々に、前方側、後方側夫々に突出した保持用突片４５を備えている。 Further, the worm support member 44 includes holding protrusions 45 protruding from the front side and the rear side at both front and rear ends.

保持部材５は、上記アッパレール２の右側壁２２と左側壁２３との間に配設された保持部本体５１〜５３と、上記アッパレール２の係止用孔２６に入り込む係止部５６、５７と、上記アッパレール２の突片挿入用孔２７、２８に入り込む突片５８、５９とを備えている。 The holding member 5 includes holding portion main bodies 51 to 53 disposed between the right side wall 22 and the left side wall 23 of the upper rail 2, locking portions 56 and 57 that enter the locking holes 26 of the upper rail 2, and , And projecting pieces 58 and 59 that enter the projecting piece insertion holes 27 and 28 of the upper rail 2.

保持部本体５１〜５３は、第１保持片としての板状の前保持片５１と、第２保持片としての板状の後保持片５２と、それらの前保持片５１と後保持片５２との夫々の下端側の基端側を連結した板状の連結片５３とを備えている。 The holding body 51 to 53 includes a plate-like front holding piece 51 as a first holding piece, a plate-like rear holding piece 52 as a second holding piece, and the front holding piece 51 and the rear holding piece 52. And a plate-like connecting piece 53 connecting the base end sides of the lower end sides of each.

この実施形態では、前保持片５１と後保持片５２と連結片５３とは、弾性を有する１枚の金属製の板状片を略コの字状に折り曲げ成形することにより形成されている。 In this embodiment, the front holding piece 51, the rear holding piece 52, and the connecting piece 53 are formed by bending a single metal plate-like piece having elasticity into a substantially U-shape.

又、前保持片５１と後保持片５２とは、それぞれの内側面間にナット部材４及びウォーム支持部材４４が入る程度の距離を隔てて互いに前後に対向配置されている。 Further, the front holding piece 51 and the rear holding piece 52 are opposed to each other in the front-rear direction with a distance that allows the nut member 4 and the worm support member 44 to enter between the inner side surfaces.

また、これらの前保持片５１と後保持片５２とは、夫々、ナット保持孔５４を備えているとともに、そのナット保持孔５４の上部側に、凹部状の突片保持部５５を備えている。 Each of the front holding piece 51 and the rear holding piece 52 has a nut holding hole 54 and a concave protrusion holding part 55 on the upper side of the nut holding hole 54. .

ナット保持孔５４は、ナット部材４を回転自在に保持するナット保持部としてのもので、この実施形態では、合成樹脂製のブッシュ５４ａを介してナット部材４の軸を回転自在に保持する。 The nut holding hole 54 serves as a nut holding portion that holds the nut member 4 rotatably. In this embodiment, the nut holding hole 54 holds the shaft of the nut member 4 rotatably via a synthetic resin bush 54a.

突片保持部５５は、ウォーム支持部材４４の保持用突片４５を保持するもので、各前保持片５１と後保持片５２とにおける幅方向の左右両端面夫々に、それらの端面から、保持用突片４５を入り込ませることができる程度に凹ませるようにして形成されている。 The protruding piece holding part 55 holds the holding protruding piece 45 of the worm support member 44. The protruding piece holding part 55 holds the front holding piece 51 and the rear holding piece 52 in the width direction from both end faces. It is formed so as to be recessed to such an extent that the protruding piece 45 can be inserted.

次に、係止部５６、５７について説明する。係止部５６、５７は、前保持片５１の上端側の先端側に、前保持片５１と一体的に設けられた第１係止部５６と、後保持片５２の上端側の先端部に、後保持片５２と一体的に設けられ第１係止部５６と対をなすように形成された第２係止部５７とから構成されている。 Next, the locking portions 56 and 57 will be described. The locking portions 56 and 57 are provided at the top end of the front holding piece 51 at the top end side of the front holding piece 51, and at the top end of the rear holding piece 52 and the first locking portion 56 provided integrally with the front holding piece 51. The second holding portion 57 is provided integrally with the rear holding piece 52 and is formed to be paired with the first locking portion 56.

これらの第１係止部５６と第２係止部５７とは、保持部材５が外力を受けていない通常状態で、外面同士の距離Ｌ１（図７に図示）が、上記アッパレール２の係止用孔２６の前後の長さ、即ち、係止用孔２６を区画形成した前内側面２６ａと後内側面２６ｂとの距離Ｌ３（図１１参照）よりも大きくなるように構成されている。 The first locking portion 56 and the second locking portion 57 are in a normal state where the holding member 5 is not subjected to an external force, and the distance L1 between the outer surfaces (shown in FIG. 7) is that the upper rail 2 is locked. The front and rear lengths of the holes 26, that is, the distance L3 (see FIG. 11) between the front inner surface 26a and the rear inner surface 26b in which the locking holes 26 are defined are configured to be larger.

尚、この実施形態では、前保持片５１と後保持片５２とは、上記通常状態で、図７に示すように互いの距離が基端部側から係止部５６、５７側に行くに従って漸次大きくなるように設定されている。又、第１係止部５６と第２係止部５７との先端には、夫々、先端に行くに従って互いの距離が短くなるように形成した案内部５６ａ、５７ａを備え、案内部５６ａ、５７ａによって係止用孔２６に入り易くしている。 In this embodiment, the front holding piece 51 and the rear holding piece 52 gradually move in the normal state as the distance from each other increases from the base end side to the locking parts 56 and 57 side as shown in FIG. It is set to be large. Further, the distal ends of the first locking portion 56 and the second locking portion 57 are respectively provided with guide portions 56a and 57a formed so that the distance from each other becomes shorter toward the distal end, and the guide portions 56a and 57a are provided. This makes it easy to enter the locking hole 26.

次に、突片５８、５９について説明する。突片５８、５９は、前保持片５１の左右の両端夫々から幅方向の左右方向に突出するように設けられた第１突片５８と、後保持片５２の左右の両端夫々に、各第１突片５８と対をなすように設けられた第２突片５９とから構成されている。 Next, the protruding pieces 58 and 59 will be described. The projecting pieces 58 and 59 are respectively provided on the first projecting piece 58 provided so as to project from the left and right ends of the front holding piece 51 in the left-right direction in the width direction and the left and right ends of the rear holding piece 52. The second projection piece 59 is provided so as to make a pair with the first projection piece 58.

第１突片５８は、その前後幅が、上記アッパレール２の前突片挿入用孔２７（図１１参照）の前後幅より小さく設定され、上下の長さが前突片挿入用孔２７の上下の長さよりも短く設定されている。これにより、第１突片５８は、前突片挿入用孔２７に入り込むとともに、入り込んだ前突片挿入用孔２７内を上下方向に移動可能とされている。 The front and rear widths of the first projecting pieces 58 are set to be smaller than the front and rear widths of the front projecting piece insertion holes 27 (see FIG. 11) of the upper rail 2, and the upper and lower lengths are the upper and lower lengths of the front projecting piece insertion holes 27. It is set shorter than the length. As a result, the first projecting piece 58 enters the front projecting piece insertion hole 27 and can move in the up and down direction within the entered front projecting piece insertion hole 27.

一方、第２突片５９は、その前後幅が、上記アッパレール２の後突片挿入用孔２８の前後幅より小さく設定され、上下の長さが前突片挿入用孔２７の上下の長さよりも短く設定され、後突片挿入用孔２８に上下方向に移動可能に入り込むように形成されている。 On the other hand, the second projecting piece 59 has a front-rear width smaller than the front-rear width of the rear projecting piece insertion hole 28 of the upper rail 2, and the vertical length is larger than the upper and lower lengths of the front projecting piece insertion hole 27. Is set to be short, and is formed so as to enter the rear projecting piece insertion hole 28 so as to be movable in the vertical direction.

このように構成された保持部材５は、次のようにして、アッパレール２に組み付けられている。図７に示すように、前保持片５１と後保持片５２との夫々の内面間にナット部材４を入れるようにして、夫々のナット保持孔５４に、ブッシュ５４ａを介してナット部材４の軸を入れる。 The holding member 5 configured as described above is assembled to the upper rail 2 as follows. As shown in FIG. 7, the nut member 4 is inserted between the inner surfaces of the front holding piece 51 and the rear holding piece 52, and the shaft of the nut member 4 is inserted into each nut holding hole 54 via a bush 54a. Insert.

又、そのナット部材４の上に、ウォーム支持部材４４に支持されたウォーム４３を置くように配設する。そして、第１係止部５６と第２係止部５７とを、図８に示すように互いに接近する方向に力を加えて互いの距離Ｌ１を狭める。 A worm 43 supported by a worm support member 44 is placed on the nut member 4. Then, a force is applied to the first locking portion 56 and the second locking portion 57 in a direction approaching each other as shown in FIG.

これにより、保持部材５を構成した前保持片５１と後保持片５２と連結片５３との全体が撓んで弾性を蓄えつつ（図８では、撓みを表示していない）、第１係止部５６と第２係止部５７との上記距離Ｌ１が狭まる。そして、図８に示すように、上記距離Ｌ１が、係止用孔２６を区画形成した前内側面２６ａと後内側面２６ｂとの距離Ｌ３（図１１参照）よりもやや小さくなるまで行う。 As a result, the front holding piece 51, the rear holding piece 52, and the connecting piece 53 that constitute the holding member 5 are all bent to store elasticity (in FIG. 8, no bending is displayed), and the first locking portion. The distance L1 between 56 and the second locking portion 57 is reduced. Then, as shown in FIG. 8, the distance L1 is made slightly smaller than the distance L3 (see FIG. 11) between the front inner side surface 26a and the rear inner side surface 26b in which the locking holes 26 are defined.

又、この実施形態では、上記距離Ｌ１が上記距離Ｌ３と同程度になる直前に、各ブッシュ５４ａに設けた突起５４ｂ（図３参照）が前保持片５１と後保持片５２との夫々に当接する。そして、上記距離Ｌ１が、上記距離Ｌ３と同じ又はそれ以上、短くなると、突起５４ｂが押圧されて突起５４ｂが有する弾性に抗して突出高さが低くなる。 Further, in this embodiment, immediately before the distance L1 becomes approximately the same as the distance L3, the protrusions 54b (see FIG. 3) provided on the bushes 54a contact the front holding piece 51 and the rear holding piece 52, respectively. Touch. When the distance L1 is equal to or shorter than the distance L3, the protrusion 54b is pressed and the protrusion height decreases against the elasticity of the protrusion 54b.

又、この状態で、前保持片５１と後保持片５２との夫々のナット保持孔５４にブッシュ５４ａを介してナット部材４を回転自在に保持するとともに、前保持片５１と後保持片５２との夫々の突片保持部５５に、ウォーム支持部材４４の保持用突片４５が入り込んで、ウォーム支持部材４４を移動不能に保持した状態になる。 In this state, the nut member 4 is rotatably held in the nut holding holes 54 of the front holding piece 51 and the rear holding piece 52 via the bush 54a, and the front holding piece 51 and the rear holding piece 52 are The protrusions 45 for holding the worm support member 44 enter the respective protrusion holding parts 55, and the worm support member 44 is held immovably.

又、この保持状態で、ナット部材４のウォームホイール部４２とウォーム４３とが設定位置で噛合するとともに、その噛合した状態で維持される。又、この実施形態では、ナット部材４の回転に際して、ブッシュ５４ａに設けられた回り止め片５４ｃ（図３参照）がウォーム支持部材４４に当接してブッシュ５４ａがナット部材４と共に回転するのが防止される。 Further, in this holding state, the worm wheel portion 42 of the nut member 4 and the worm 43 mesh with each other at the set position, and the meshed state is maintained. Further, in this embodiment, when the nut member 4 is rotated, the detent pieces 54c (see FIG. 3) provided on the bush 54a abut against the worm support member 44 to prevent the bush 54a from rotating together with the nut member 4. Is done.

更に、その状態で、第１突片５８と第２突片５９との外面同士の距離が、アッパレール２の前突片挿入用孔２７と後突片挿入用孔２８との上記距離Ｌ４と同程度になる。 Further, in this state, the distance between the outer surfaces of the first projecting piece 58 and the second projecting piece 59 is the same as the distance L4 between the front projecting piece insertion hole 27 and the rear projecting piece insertion hole 28 of the upper rail 2. It will be about.

そして、この状態で、図９に示すように、アッパレール２に下方側から押し込む。これにより、アッパレール２の右側壁２２と左側壁２３との内幅が、第１突片５８と第２突片５９とによって、アッパレール２が有する弾性に抗して押し広げられ、保持部材５をそれらの右側壁２２と左側壁２３との間に押し入れることができる。 And in this state, as shown in FIG. 9, it pushes into the upper rail 2 from the downward side. As a result, the inner width between the right side wall 22 and the left side wall 23 of the upper rail 2 is expanded by the first projecting piece 58 and the second projecting piece 59 against the elasticity of the upper rail 2, thereby holding the holding member 5. It can be pushed between the right side wall 22 and the left side wall 23.

そして、図１０に示すように、保持部材５の第１突片５８と第２突片５９とがアッパレール２の前突片挿入用孔２７と後突片挿入用孔２８との夫々に合致すると、それらに入り込む。それらが入り込んだ後は、弾性によってアッパレール２の右側壁２２と左側壁２３との内幅がもとに戻り、第１突片５８と第２突片５９とがアッパレール２の前突片挿入用孔２７と後突片挿入用孔２８とから抜け止めされる。 As shown in FIG. 10, when the first projecting piece 58 and the second projecting piece 59 of the holding member 5 match the front projecting piece insertion hole 27 and the rear projecting piece insertion hole 28 of the upper rail 2, respectively. Get into them. After they enter, the inner width of the right side wall 22 and the left side wall 23 of the upper rail 2 returns to the original due to elasticity, and the first projecting piece 58 and the second projecting piece 59 are used for inserting the front projecting piece of the upper rail 2. The hole 27 and the rear protrusion piece insertion hole 28 are prevented from coming off.

又、この状態で、図１１に示すように第１係止部５６と第２係止部５７との夫々の先端が、アッパレール２の係止用孔２６に、内側（下側）から外側（上側）に出る。 Further, in this state, as shown in FIG. 11, the respective leading ends of the first locking portion 56 and the second locking portion 57 are inserted into the locking hole 26 of the upper rail 2 from the inner side (lower side) to the outer side (lower side). Go up).

その状態で、上記距離を狭めるように加えた力（外力）を除去する。これにより、撓んだ前保持片５１と後保持片５２と連結片５３との全体が復元する際の弾性力（復元力）によって、第１係止部５６と第２係止部５７との互いの前後方向の距離が広がろうとする。 In this state, the force (external force) applied to reduce the distance is removed. Thereby, the elastic force (restoring force) when the whole of the bent front holding piece 51, rear holding piece 52, and connecting piece 53 is restored causes the first locking portion 56 and the second locking portion 57 to move. The distance between each other in the front-rear direction tends to increase.

そして、第１係止部５６と第２係止部５７とが、係止用孔２６を区画形成した前内側面２６ａと後内側面２６ｂとの夫々を互いに反対方向の前後方向に押圧した状態になる。 And the 1st latching | locking part 56 and the 2nd latching | locking part 57 pressed each of the front inner side surface 26a and the rear inner side surface 26b which dividedly formed the locking hole 26 in the front-back direction of the mutually opposite direction. become.

そして、その押圧力によって第１係止部５６と第２係止部５７とが、上記前内側面２６ａと後内側面２６ｂとの夫々に係止する。 And the 1st latching | locking part 56 and the 2nd latching | locking part 57 latch to each of the said front inner surface 26a and the rear inner surface 26b with the pressing force.

又、第１係止部５６と第２係止部５７との互いの前後方向の距離Ｌ１が広がるに際して、押圧されていたブッシュ５４ａの突起５４ｂが弾性によって突出高さを高くしていき、前保持片５１と後保持片５２との夫々と当接した状態を維持する。従って、保持部材とブッシュ５４ａとの間に隙間の発生を防止でき、ナット部材４から保持部材５への力の伝達効率が悪くなるのを防止できる。 Further, when the distance L1 between the first locking portion 56 and the second locking portion 57 in the front-rear direction increases, the protrusion 54b of the pressed bush 54a increases the protrusion height by elasticity, and the front The state in which the holding piece 51 and the rear holding piece 52 are in contact with each other is maintained. Therefore, it is possible to prevent a gap from being generated between the holding member and the bush 54a, and it is possible to prevent the transmission efficiency of force from the nut member 4 to the holding member 5 from being deteriorated.

以上により、保持部材５を、アッパレール２に組み付けることができる。又、このようにして保持部材５に保持されたナット部材４は、スクリューロッド３と螺合される。又、保持部材５にウォーム支持部材４４を介して保持されたウォーム４３は、図示しない連結軸を介して図示しないモータと接続される。 As described above, the holding member 5 can be assembled to the upper rail 2. Further, the nut member 4 held by the holding member 5 in this way is screwed with the screw rod 3. The worm 43 held by the holding member 5 via the worm support member 44 is connected to a motor (not shown) via a connecting shaft (not shown).

そして、モータが作動すると、それに伴ってウォーム４３及びそれに噛合したウォームホイール部４２を有するナット部材４が減速されながら回転する。 When the motor is operated, the worm 43 and the nut member 4 having the worm wheel portion 42 meshed therewith are rotated while being decelerated.

このナット部材４の回転によって、そのナット部材４が、螺合したスクリューロッド３に対して相対的に軸方向の前後方向に移動する。その際、スクリューロッド３がロアレール１に固定されているため、ナット部材４がスクリューロッド３の軸方向に移動する。 By the rotation of the nut member 4, the nut member 4 moves in the axial front-rear direction relative to the screwed screw rod 3. At this time, since the screw rod 3 is fixed to the lower rail 1, the nut member 4 moves in the axial direction of the screw rod 3.

又、このナット部材４の移動に際して、ナット部材４を保持した保持部材５が共に移動する。そして、この保持部材５の移動によって、保持部材５が組み付けられたアッパレール２が共に移動し、このアッパレール２を固定したシートが車体に対して前後方向に移動する。 Further, when the nut member 4 is moved, the holding member 5 holding the nut member 4 is moved together. As the holding member 5 moves, the upper rail 2 to which the holding member 5 is assembled moves together, and the seat to which the upper rail 2 is fixed moves in the front-rear direction with respect to the vehicle body.

又、シートが車体に固定されたロアレール１に対して不意に長手方向に沿う前方向または後方向の力がかかった場合、その力がアッパレール２を介して保持部材５からナット部材４にかかる。その結果、ナット部材４から保持部材５に後方向または前方向の反力がかかり、保持部材５が変形し始めようとする。 Further, when a forward or rearward force along the longitudinal direction is unexpectedly applied to the lower rail 1 on which the seat is fixed to the vehicle body, the force is applied from the holding member 5 to the nut member 4 via the upper rail 2. As a result, a backward or forward reaction force is applied from the nut member 4 to the holding member 5, and the holding member 5 starts to deform.

例えば保持部材５が第１突片５８及び第２突片５９を備えていない場合には、図１２に示すように、保持部材５が更に変形して塑性変形するおそれが生じるとともに、第１係止部５６と第２係止部５７とがアッパレール２の係止用孔２６から外れるおそれが生じる。 For example, when the holding member 5 does not include the first protruding piece 58 and the second protruding piece 59, the holding member 5 may be further deformed and plastically deformed as shown in FIG. There is a possibility that the stop portion 56 and the second locking portion 57 may come off from the locking hole 26 of the upper rail 2.

しかし、保持部材５が変形し始めると、保持部材５の第１突片５８及び第２突片５９と、アッパレール２の前突片挿入用孔２７と後突片挿入用孔２８との夫々を区画形成した前内側面２９又は後内側面３０とが当接する。 However, when the holding member 5 starts to deform, the first projecting piece 58 and the second projecting piece 59 of the holding member 5, and the front projecting piece insertion hole 27 and the rear projecting piece insertion hole 28 of the upper rail 2, respectively. The front inner side 29 or the rear inner side 30 that has been partitioned comes into contact.

これにより、ナット部材４から保持部材５にかかる力を前突片挿入用孔２７と後突片挿入用孔２８との夫々を区画形成した前内側面２９又は後内側面３０とで支えることができる。 Thus, the force applied from the nut member 4 to the holding member 5 can be supported by the front inner side surface 29 or the rear inner side surface 30 in which the front protrusion piece insertion hole 27 and the rear protrusion piece insertion hole 28 are defined. it can.

よって、保持部材５を変形し難くでき、保持部材５によって、常時ナット部材４を円滑に回転しうる状態に保持できる。 Therefore, the holding member 5 can be hardly deformed, and the holding member 5 can hold the nut member 4 in a state where the nut member 4 can be rotated smoothly at all times.

尚、上記実施形態では、スクリューロッド３をロアレール１に組み付け、保持部材５をアッパレール２に組み付けているが、この形態のものに限らず、例えばスクリューロッド３をアッパレール２に組み付け、保持部材５をロアレール１に組み付けるようにしても良く、適宜変更できる。 In the above embodiment, the screw rod 3 is assembled to the lower rail 1 and the holding member 5 is assembled to the upper rail 2. However, the present invention is not limited to this configuration. For example, the screw rod 3 is assembled to the upper rail 2 and the holding member 5 is It may be assembled to the lower rail 1 and can be changed as appropriate.

又、上記実施形態では、突片挿入用孔２７、２８を設けるとともに、第１突片５８及び第２突片５９を設けているが、これらを設けない形態のものであっても良く、適宜変更できる。 In the above embodiment, the projecting piece insertion holes 27 and 28 are provided, and the first projecting piece 58 and the second projecting piece 59 are provided. Can change.

又、突片挿入用孔２７、２８を設ける場合において、上記実施形態のように、第１突片５８、第２突片５９夫々の板厚と同程度の前後幅を有するスリット状の２つの孔から構成したが、この形態のものに限らず、適宜変更できる。 Further, in the case of providing the projecting piece insertion holes 27 and 28, as in the above-described embodiment, two slit-shaped two-dimensionally having front and rear widths similar to the plate thicknesses of the first projecting piece 58 and the second projecting piece 59 are provided. Although it comprised from the hole, it can change suitably not only in the thing of this form.

例えば図１３に示すように突片挿入用孔１２７を、アッパレール２の左側壁２３及び右側壁夫々に（図１３では左側壁２３のみを表している）、図１１で示した前突片挿入用孔２７と後突片挿入用孔２８との上記距離Ｌ４と同程度の前後幅を有する１つの長方形状に形成する。そして、図１４に示すように、第１突片５８と第２突片５９とを同時に入れるようにしても良い。 For example, as shown in FIG. 13, the projecting piece insertion hole 127 is inserted into each of the left side wall 23 and the right side wall of the upper rail 2 (only the left side wall 23 is shown in FIG. 13). The hole 27 and the rear protrusion piece insertion hole 28 are formed in one rectangular shape having a front-rear width that is approximately the same as the distance L4. And as shown in FIG. 14, you may make it insert the 1st protrusion piece 58 and the 2nd protrusion piece 59 simultaneously.

このように構成しても、例えば上述の前または後方向の力がかかると、保持部材５の第１突片５８と第２突片５９とが突片挿入用孔１２７の前内側面１２７ｂ、後内側面１２７ｂ夫々に当接して、保持部材５の第１突片５８又は第２突片５９を支えることができ、保持部材５が変形し難いものにできる。 Even in this configuration, for example, when the above-described forward or backward force is applied, the first projecting piece 58 and the second projecting piece 59 of the holding member 5 are connected to the front inner side surface 127b of the projecting piece insertion hole 127, The first projecting piece 58 or the second projecting piece 59 of the holding member 5 can be supported by coming into contact with each of the rear inner side surfaces 127b, and the holding member 5 can be hardly deformed.

１ロアレール
２アッパレール
３スクリューロッド
４ナット部材
５保持部材
２７前突片挿入用孔
２８後突片挿入用孔
４２ウォームホイール部（減速手段）
４３ウォーム（減速手段）
５６第１係止部
５７第２係止部
５８第１突片
５９第２突片 DESCRIPTION OF SYMBOLS 1 Lower rail 2 Upper rail 3 Screw rod 4 Nut member 5 Holding member 27 Front protrusion piece insertion hole 28 Rear protrusion piece insertion hole 42 Warm wheel part (deceleration means)
43 Worm (Deceleration means)
56 1st locking part 57 2nd locking part 58 1st protrusion piece 59 2nd protrusion piece

Claims

The nut member screwed to the screw rod provided on one of the lower rail fixed to the vehicle body and the upper rail fixed to the seat is held by the holding member provided on the other rail. A sliding structure for a vehicle seat in which the nut member is rotationally driven by a driving means, and the seat is movable in the front-rear direction of the vehicle body,
The nut member is provided with a speed reduction means,
The speed reduction means includes a worm wheel portion formed on the outer periphery of the nut member, and a worm meshed with the worm wheel portion and connected to the driving means so as to be able to transmit rotation,
The worm is rotatably supported by a worm support member,
The worm support member includes a holding protrusion,
The holding member holds the holding protrusion of the worm support member in an immovable manner so that the nut holding hole for rotatably holding the nut member, and the worm wheel portion and the worm can maintain a meshed state. A concave-shaped protruding piece holding part
The other rail includes a locking hole for locking the holding member,
The holding member is made of a material having elasticity, and includes a first locking portion and a second locking portion that are arranged to face each other with a distance in the front-rear direction,
As the distance is reduced against the elasticity, the first locking portion and the second locking portion can enter the locking hole, and the nut member rotates into the nut holding hole. The holding piece of the worm support member enters the protruding piece holding portion and is held by the holding member, and the elasticity increases the distance and enters the locking hole. A sliding structure for a vehicle seat, wherein the first locking portion and the second locking portion are configured to be able to press and lock the inner surface on which the locking hole is defined .

The other rail includes a first wall and a second wall arranged opposite to each other on both sides in the width direction, and a third wall connecting them.
The locking hole is provided in the third wall,
The holding member includes a plate-like elastic first holding piece and a second holding piece that are arranged to face each other with a distance in the front-rear direction, and a plate-like elastic connecting piece that connects their base ends. With
The nut member and the worm support member are disposed between the first holding piece and the second holding piece, and are held by the first holding piece and the second holding piece,
The first locking portion is provided on the distal end side of the first holding piece, and the second locking portion is provided on the distal end side of the second holding piece, respectively.
Each of the first holding piece and the second holding piece is further provided with a protruding piece projecting in the width direction at each of both ends in the width direction,
Each of the first wall and the second wall includes a protruding piece insertion hole formed so that each of the protruding pieces can enter when each of the engaging portions enters the engaging hole. The vehicle seat slide structure according to claim 1 .