JP2011174264A

JP2011174264A - Sash roller

Info

Publication number: JP2011174264A
Application number: JP2010037951A
Authority: JP
Inventors: Takahiro Akagi; 隆宏赤木
Original assignee: SKB KK; Software Knowledge Base Co Ltd
Current assignee: SKB KK; Software Knowledge Base Co Ltd
Priority date: 2010-02-23
Filing date: 2010-02-23
Publication date: 2011-09-08

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sash roller in which the arrangement structure of sash roller components is optimized to overcome the brittleness of a housing comprising plastic molded articles, while reducing the overall costs. <P>SOLUTION: The sash roller includes a housing 5 comprising plastic molded articles, a wheel frame 7 and a wheel 8 arranged in the accommodation part 6 within the housing 5, and a height adjustment mechanism and a front/rear adjustment mechanism provided between the wheel frame 7 and housing 5. The wheel frame 7 is supported with an oscillation shaft 40 provided to the housing 5 so as to vertically oscillate. The height adjustment mechanism includes a height adjustment screw 41 supported rotatably on a side end wall 10 facing the accommodation part 6, and a female screw body 42 mounted on the wheel frame 7 to be reciprocated with the height adjustment screw 41. The height adjustment screw 41 is arranged on the lower half part side of the side end wall 10. The oscillation shaft 40 is arranged above the height adjustment screw 41, securing the strength of the circumferential wall of the bearing hole 25 formed in the housing 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、ハウジングの内部に高さ調整機構と前後調整機構とが組み込んである戸車に関し、なかでも車輪枠を上下に揺動操作して高さ調整を行なう構造の戸車に関する。 The present invention relates to a door wheel in which a height adjustment mechanism and a front-rear adjustment mechanism are incorporated in a housing, and more particularly to a door wheel having a structure in which a height adjustment is performed by swinging a wheel frame up and down.

この種の戸車は、例えば特許文献１にみることができる。そこでは、ハウジングと、車輪を支持する車輪枠と、高さ調整機構および前後調整機構などで戸車を構成している。車輪枠はハウジングで揺動軸を介して上下揺動可能に支持されており、高さ調整機構で車輪枠を調整操作することにより、車輪および車輪枠をハウジングに対して上下動することができる。揺動軸はハウジングの下縁寄りに設けてあり、車輪枠を調整操作する高さ調整ねじと、同ねじで往復操作される雌ねじ体とは、車輪枠の上方に配置してある。前後調整機構は、調整ねじより下方の空間を利用してハウジングに組み込んである。この部品配置は業界標準ともなっており、市販されている多くの戸車が同様の部品配置を採用している。 This type of door cart can be found in Patent Document 1, for example. There, the door is constituted by a housing, a wheel frame that supports the wheels, a height adjustment mechanism, a front-rear adjustment mechanism, and the like. The wheel frame is supported by the housing so as to be swingable up and down via a swing shaft, and the wheel and the wheel frame can be moved up and down with respect to the housing by adjusting the wheel frame with a height adjusting mechanism. . The swing shaft is provided near the lower edge of the housing, and a height adjusting screw for adjusting the wheel frame and a female screw body reciprocated by the screw are arranged above the wheel frame. The front / rear adjustment mechanism is incorporated in the housing using a space below the adjustment screw. This component arrangement has become an industry standard, and many commercially available door carts adopt the same component arrangement.

上記構造の戸車においては、戸パネルの重量や、車輪に作用する衝撃力が、車輪枠を支える揺動軸に集中する。そのため、ハウジングがプラスチック成形品で形成してある場合に、揺動軸を支持するハウジングの軸受穴の周囲壁に亀裂や割れを生じやすい。とくに、揺動軸がハウジングの下縁寄りに設けてある業界標準の戸車において、軸受穴の下半壁部の強度が不足して亀裂や割れを生じやすい。 In the door wheel having the above structure, the weight of the door panel and the impact force acting on the wheel are concentrated on the swing shaft that supports the wheel frame. Therefore, when the housing is formed of a plastic molded product, cracks and cracks are likely to occur in the peripheral wall of the bearing hole of the housing that supports the swing shaft. In particular, in an industry standard door wheel in which the swing shaft is provided near the lower edge of the housing, the strength of the lower half wall portion of the bearing hole is insufficient, and cracks and cracks are likely to occur.

上記のようなハウジングの強度不足を補うために、特許文献２の戸車では、プラスチック成形品からなるケースと金属成形品からなる支持板とでハウジングを構成して、揺動軸を金属製の支持板で軸支している。また、特許文献３の戸車には、外ケース（ハウジング）を亜鉛ダイキャスト成形品で形成することが開示してあり、こうした戸車によれば軸受穴の周囲壁の強度を増強して亀裂や割れを防止できる。本発明の戸車においては、前後調整機構の調整動作を、揺動軸に沿って往復動するスライドブロックを介して車輪枠に伝えるが、この種の前後調整構造は特許文献３の戸車に開示されている。 In order to compensate for the insufficient strength of the housing as described above, in the door of Patent Document 2, the housing is composed of a case made of a plastic molded product and a support plate made of a metal molded product, and the swing shaft is made of metal support. It is pivotally supported by a plate. Further, the door of Patent Document 3 discloses that the outer case (housing) is formed of a zinc die-cast product, and according to such a door, the strength of the peripheral wall of the bearing hole is increased and cracks and cracks are generated. Can be prevented. In the door pulley of the present invention, the adjustment operation of the front / rear adjustment mechanism is transmitted to the wheel frame via a slide block that reciprocates along the swing shaft. This type of front / rear adjustment structure is disclosed in the door door of Patent Document 3. ing.

近年、前後厚みが小さな薄型の戸パネルが普及しつつあり、それに伴ない、高さ調整機能と前後調整機能を備えたままで、戸車全体の前後厚みを小さくすることが要求されてきている。本出願人は戸車の薄型化要求に対応した戸車を先に提案しており（特許文献４）、そこでは、ラックおよびピニオンを機構要素にして前後調整機構を構成し、その構成部品点数を減らすことにより戸車の前後厚みを減少している。 In recent years, thin door panels with small front and rear thicknesses are becoming widespread, and accordingly, it has been required to reduce the front and rear thicknesses of the entire door wheel while maintaining the height adjustment function and the front and rear adjustment function. The present applicant has previously proposed a door cart corresponding to the demand for thinner door carts (Patent Document 4), in which a front and rear adjustment mechanism is configured using a rack and a pinion as a mechanism element to reduce the number of components. This reduces the front and rear thickness of the door pulley.

本発明の戸車では、揺動軸をハウジングの下縁から離れた位置に配置してハウジングの脆弱性を解消するが、このように車輪枠の揺動軸の位置をハウジングの下縁から離れた位置に設定した戸車は特許文献５に開示されている。しかし、特許文献５における戸車は、揺動軸がハウジングで軸支してある訳ではなく、したがって車輪枠の支持構造がハウジングの強度に影響を及ぼすことはない。 In the door wheel of the present invention, the oscillating shaft is arranged at a position away from the lower edge of the housing to eliminate the fragility of the housing. Thus, the position of the oscillating shaft of the wheel frame is separated from the lower edge of the housing. The door wheel set to the position is disclosed in Patent Document 5. However, in the door wheel in Patent Document 5, the swing shaft is not pivotally supported by the housing, and therefore the support structure of the wheel frame does not affect the strength of the housing.

特許第３００１１７９号公報（段落番号００２１、図２）Japanese Patent No. 3001179 (paragraph number 0021, FIG. 2) 特開２００７−２７７９３７号公報（段落番号００１９、図８）JP 2007-277937 (paragraph number 0019, FIG. 8) 特開２００４−０８４２８２号公報（段落番号００１４、図３）Japanese Patent Laying-Open No. 2004-084282 (paragraph number 0014, FIG. 3) 特開２００６−０７０６０９号公報（段落番号００１５、図２）Japanese Patent Laying-Open No. 2006-070609 (paragraph number 0015, FIG. 2) 特開平０９−１２５８００号公報（段落番号００１３、図１）JP 09-125800 A (paragraph number 0013, FIG. 1)

以上のように、従来の戸車は、特許文献１の戸車のように業界標準の部品配置とする場合に、ハウジングの軸受穴の周囲壁に亀裂や割れを生じやすい。その点、特許文献２・３の戸車は、ハウジングの一部または全体を金属製のダイキャスト成形品で形成して、ハウジングの脆弱性を克服できる。しかし、金属製のダイキャスト成形品は、プラスチック成形品で形成したハウジングに比べて、製造コストが高く付いてしまう。 As described above, when a conventional door cart has an industry standard component arrangement like the door wheel of Patent Document 1, cracks and cracks are likely to occur in the peripheral wall of the bearing hole of the housing. In that respect, the door pulleys of Patent Documents 2 and 3 can overcome the fragility of the housing by forming a part or the whole of the housing with a metal die cast product. However, a metal die-cast molded product has a higher manufacturing cost than a housing formed of a plastic molded product.

特許文献１〜４の戸車では、車輪枠と高さ調整機構および前後調整機構などの戸車構成部品の全てをハウジング内に設けた収容部に収容する。そのため、車輪枠の前後厚みを一定とし、前後調整機構による調整寸法を一定とするときの戸車の前後厚みは、（車輪枠の厚み寸法＋収容部の前後面壁と車輪枠との間に確保される前後の調整隙間＋収容部に臨むハウジングの前後壁の厚み寸法）となる。したがって、戸車の前後厚みを小さくするには、車輪もしくは車輪枠の厚み寸法を小さくするか、前後の調整隙間を小さくするか、ハウジングの前後壁の厚み寸法を小さくする以外に方法はない。先に説明したようにハウジングを金属材で形成して、その前後壁の厚み寸法を小さくすることは不可能ではない。しかし、たとえ前後壁の厚み寸法を半減できたとしても、減少できる値はごく僅かでしかなく、しかも製造コストが嵩む問題を解消できない。 In the door carts of Patent Literatures 1 to 4, all wheelchair components such as the wheel frame, the height adjustment mechanism, and the front-rear adjustment mechanism are housed in a housing portion provided in the housing. Therefore, the front-rear thickness of the door wheel when the front-rear thickness of the wheel frame is constant and the adjustment dimension by the front-rear adjustment mechanism is constant is ensured between the wheel frame thickness dimension + the front-rear surface wall of the housing portion and the wheel frame. The front and rear adjustment gap + the thickness dimension of the front and rear walls of the housing facing the housing portion). Therefore, in order to reduce the front-rear thickness of the door wheel, there is no method other than reducing the thickness dimension of the wheel or wheel frame, reducing the front-rear adjustment gap, or reducing the thickness dimension of the front-rear wall of the housing. As described above, it is not impossible to reduce the thickness dimension of the front and rear walls of the housing formed of a metal material. However, even if the thickness dimension of the front and rear walls can be halved, the value that can be reduced is very small, and the problem of increased manufacturing cost cannot be solved.

本発明の目的は、戸車を構成する部品の配置構造を根本から見直して最適化することにより、プラスチック成形品からなるハウジングの脆弱性を解消し、全体コストを削減できる戸車を提供することにある。
本発明の目的は、車輪枠とハウジングとの関係構造の最適化を図って、従来のハウジングより薄型化でき、前後厚みが小さな薄型の戸パネルに適用するのに好適な戸車を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a door cart that can eliminate the fragility of a housing made of a plastic molded product and reduce the overall cost by reviewing and optimizing the arrangement structure of components constituting the door cart. .
It is an object of the present invention to provide a door wheel suitable for application to a thin door panel that can be made thinner than a conventional housing and has a small front-rear thickness by optimizing the relational structure between the wheel frame and the housing. is there.

本発明に係る戸車は、プラスチック成形品からなるハウジング５と、ハウジング５内の収容部６に配置される車輪枠７および車輪８と、車輪枠７とハウジング５との間に設けられる高さ調整機構、および前後調整機構とを備えている。車輪枠７は、ハウジング５に設けた揺動軸４０で上下揺動可能に支持する。高さ調整機構は、収容部６に臨む側端壁１０で回転自在に支持される高さ調整ねじ４１と、車輪枠７に装着されて、高さ調整ねじ４１で往復操作される雌ねじ体４２を含む。側端壁１０の下半部側に高さ調整ねじ４１を配置して、高さ調整ねじ４１より上方に揺動軸４０が配置してあることを特徴とする。 The door wheel according to the present invention includes a housing 5 made of a plastic molded product, a wheel frame 7 and a wheel 8 disposed in a housing portion 6 in the housing 5, and a height adjustment provided between the wheel frame 7 and the housing 5. A mechanism, and a front-rear adjustment mechanism. The wheel frame 7 is supported by a swing shaft 40 provided in the housing 5 so as to be swingable up and down. The height adjustment mechanism includes a height adjustment screw 41 that is rotatably supported by the side end wall 10 facing the housing portion 6, and a female screw body 42 that is attached to the wheel frame 7 and reciprocated by the height adjustment screw 41. including. A height adjusting screw 41 is disposed on the lower half portion side of the side end wall 10, and a swing shaft 40 is disposed above the height adjusting screw 41.

揺動軸４０は、収容部６の上下中途部に配置する。揺動軸４０より上側の空間に前後調整機構を配置する。車輪枠７の上下揺動領域に臨むハウジング５の前後面に、車輪枠７の一部を露出させる開放口１５を形成する。前後の開放口１５の開口面の間で、車輪枠７を前後調整機構で前後調整する。 The swing shaft 40 is disposed in the middle part of the housing part 6 in the vertical direction. A front-rear adjustment mechanism is disposed in a space above the swing shaft 40. An opening 15 for exposing a part of the wheel frame 7 is formed on the front and rear surfaces of the housing 5 facing the vertically swinging region of the wheel frame 7. Between the opening surfaces of the front and rear opening 15, the wheel frame 7 is adjusted back and forth by a front and rear adjustment mechanism.

前後調整機構は、ハウジング５の前壁１３および後壁１４で左右スライド自在に案内される操作ブロック４６と、側端壁１０で回転のみ自在に支持されて、操作ブロック４６を雌ねじ体４８を介して左右操作する前後調整ねじ４７と、揺動軸４０で前後スライド自在に案内される受動ブロック４９と、操作ブロック４６と受動ブロック４９との間に設けられて、操作ブロック４６の左右動作を受動ブロック４９の前後動作に変換するカム構造とで構成する。カム構造は、操作ブロック４６と受動ブロック４９の対向部分に設けた、カム溝５５とカムピン５９とで構成する。 The front / rear adjusting mechanism is supported by the front wall 13 and the rear wall 14 of the housing 5 so as to be slidable in the left-right direction, and is supported by the side end wall 10 so as to be freely rotatable. Are provided between the operation block 46 and the passive block 49 so that the left and right movements of the operation block 46 are passively provided. It is comprised with the cam structure converted into the front-back operation | movement of the block 49. FIG. The cam structure is composed of a cam groove 55 and a cam pin 59 provided in an opposing portion of the operation block 46 and the passive block 49.

本発明に係る戸車においては、ハウジング５をプラスチック成形品で形成し、側端壁１０の下半部側に高さ調整ねじ４１を配置して、この高さ調整ねじ４１より上方に配置した揺動軸４０で車輪枠７を上下揺動可能に支持した。このように、揺動軸４０を高さ調整ねじ４１より上方に配置すると、揺動軸４０を支持する軸受穴２５の形成位置を、ハウジング５の前後壁１３・１４の下縁から遠ざけることができ、これに伴ない、軸受穴２５の周囲壁の強度を充分に増強できる。したがって、プラスチック成形品からなるハウジング５における軸受穴２５の周縁壁の脆弱性を解消しながら、ハウジング５の製造コストを削減して戸車を低コスト化できる。 In the door wheel according to the present invention, the housing 5 is formed of a plastic molded product, the height adjusting screw 41 is disposed on the lower half portion side of the side end wall 10, and the rocker disposed above the height adjusting screw 41. The wheel frame 7 was supported by the moving shaft 40 so as to be swingable up and down. As described above, when the swing shaft 40 is disposed above the height adjustment screw 41, the formation position of the bearing hole 25 that supports the swing shaft 40 can be kept away from the lower edges of the front and rear walls 13 and 14 of the housing 5. Accordingly, the strength of the peripheral wall of the bearing hole 25 can be sufficiently increased. Therefore, while eliminating the weakness of the peripheral wall of the bearing hole 25 in the housing 5 made of a plastic molded product, the manufacturing cost of the housing 5 can be reduced and the cost of the door can be reduced.

揺動軸４０を収容部６の上下中途部に配置し、揺動軸４０より上側の空間に前後調整機構を配置すると、収容部６の空間を無駄なく利用しながら、車輪枠７と、高さ調整機構と、前後調整機構をハウジング５内に集約して配置できる。また、前後の開放口１５の開口面の間で車輪枠７を前後調整するので、前後調整量を一定とするときのハウジング５の前後厚みを、従来の戸車に比べて小さくでき、前後厚みが小さな薄型の戸パネルに適用するのに好適な戸車を提供できる。 When the swing shaft 40 is disposed in the middle of the upper and lower portions of the housing portion 6 and the front and rear adjustment mechanism is disposed in the space above the swing shaft 40, the wheel frame 7 and the The height adjusting mechanism and the front / rear adjusting mechanism can be arranged together in the housing 5. Moreover, since the wheel frame 7 is adjusted back and forth between the opening surfaces of the front and rear opening 15, the front and rear thickness of the housing 5 when the front and rear adjustment amount is constant can be made smaller than that of a conventional door wheel, and the front and rear thickness is reduced. A door wheel suitable for being applied to a small thin door panel can be provided.

操作ブロック４６と、前後調整ねじ４７と、受動ブロック４９と、動作変換用のカム構造などで構成した前後調整機構によれば、前後調整ねじ４７による操作ブロック４６の左右動作を、カム構造で前後動作に変換して受動ブロック４９に伝え、車輪枠７を前後に調整移動することができる。この前後調整機構によれば、戸パネル１の開閉時等に、前後方向の外力を受けて車輪枠７が前後にずれ動くのを防止して、車輪枠７を前後調整ねじ４７で規定された調整位置に常に位置させることができる。また、カム構造を両ブロック４６・４９の対向面に設けたカム溝５５とカムピン５９とで構成すると、前後調整ねじ４７で調整操作される雌ねじ体４８の左右移動量に比べて、カム構造で動作変換された後の受動ブロック４９の前後移動量を小さくでき、その分だけ前後調整機構による調整を精密に行なえる。 According to the front / rear adjustment mechanism including the operation block 46, the front / rear adjustment screw 47, the passive block 49, and the cam structure for motion conversion, the left / right motion of the operation block 46 by the front / rear adjustment screw 47 is controlled by the cam structure. It is converted into motion and transmitted to the passive block 49, and the wheel frame 7 can be adjusted and moved back and forth. According to this front / rear adjustment mechanism, when the door panel 1 is opened / closed, the wheel frame 7 is prevented from moving back and forth due to an external force in the front / rear direction, and the wheel frame 7 is defined by the front / rear adjustment screw 47. It can always be located at the adjustment position. Further, when the cam structure is composed of the cam groove 55 and the cam pin 59 provided on the opposing surfaces of the both blocks 46 and 49, the cam structure has a cam structure compared to the amount of lateral movement of the female screw body 48 that is adjusted by the front / rear adjustment screw 47. The forward / backward movement amount of the passive block 49 after the operation conversion can be reduced, and the adjustment by the front / rear adjustment mechanism can be precisely performed accordingly.

本発明に係る戸車の縦断正面図である。It is a vertical front view of the door cart concerning the present invention. 戸車を組み付けた戸パネルの側面図である。It is a side view of the door panel which assembled | attached the door car. 戸車の分解斜視図である。It is a disassembled perspective view of a door cart. 図１におけるＡ−Ａ線断面図である。It is the sectional view on the AA line in FIG. 図１におけるＢ−Ｂ線断面図である。It is the BB sectional view taken on the line in FIG. 図１におけるＣ−Ｃ線断面図である。It is CC sectional view taken on the line in FIG. 車輪高さを調整した状態の戸車の縦断正面図である。It is a vertical front view of the door roller of the state which adjusted wheel height. 車輪の前後位置を調整した状態の戸車の横断平面図である。It is a cross-sectional top view of the door pulley of the state which adjusted the front-back position of the wheel.

（実施例）図１ないし図８は本発明に係る戸車の実施例を示す。図２において符号１は木製の戸パネル、符号２は床面に埋設したガイドレールである。戸パネル１の下隅には、それぞれ逆Ｕ字状の装着溝３が形成してあり、これらの装着溝３に本発明に係る戸車を嵌め込んでビス４で固定してある。この実施例における前後、左右、上下とは、図１および図２に示す交差矢印と、矢印の近傍に表示した前後、左右、上下の文字表記に従うこととする。 (Example) FIG. 1: thru | or 8 shows the Example of the doorwheel which concerns on this invention. In FIG. 2, reference numeral 1 denotes a wooden door panel, and reference numeral 2 denotes a guide rail embedded in the floor surface. In the lower corners of the door panel 1, inverted U-shaped mounting grooves 3 are formed, and the door wheel according to the present invention is fitted into these mounting grooves 3 and fixed with screws 4. In this embodiment, “front / rear”, “left / right”, and “up / down” follow the crossing arrows shown in FIG. 1 and FIG.

図１および図３において戸車は、ハウジング５と、ハウジング５内の収容部６に配置される車輪枠７および車輪８と、車輪枠７とハウジング５との間に設けられる高さ調整機構、および前後調整機構などで構成する。ハウジング５は、ポリアセタールを素材とする射出成形品からなり、装着溝３の断面に適合して側面視の外郭線が逆Ｕ字状に形成してある。 1 and 3, the door wheel includes a housing 5, a wheel frame 7 and a wheel 8 disposed in a housing portion 6 in the housing 5, a height adjustment mechanism provided between the wheel frame 7 and the housing 5, and Consists of a longitudinal adjustment mechanism. The housing 5 is made of an injection-molded product made of polyacetal. The housing 5 is formed in an inverted U shape with a contour in side view in conformity with the cross section of the mounting groove 3.

ハウジング５は、装着溝３の側端開口で露出する側端壁１０と、側端壁１０の上部に連続して装着溝３の内奥側へ延びる半円状の上構造部１１と、上構造部１１の内奥端のブロック状の座部１２と、側端壁１０および上構造部１１に連続する前壁１３および後壁１４等を一体に備えている。先の収容部６は、側端壁１０および上構造部１１と前後壁１３・１４に囲まれて下向きに開口しており、さらに、ハウジング５の前後面に形成した開放口１５の側へ向かって開口している。座部１２は装着溝３の内奥壁に接当して、ハウジング５の差し込み限界を規定しており、その前後面および上構造部１１の上面には減肉のための凹部が形成してある。 The housing 5 includes a side end wall 10 exposed at the side end opening of the mounting groove 3, a semicircular upper structure portion 11 extending continuously from the upper portion of the side end wall 10 and extending inwardly of the mounting groove 3, A block-shaped seat portion 12 at the inner back end of the structure portion 11, a front wall 13 and a rear wall 14 that are continuous with the side end wall 10 and the upper structure portion 11 are integrally provided. The previous accommodating portion 6 is surrounded by the side end wall 10 and the upper structure portion 11 and the front and rear walls 13 and 14 and opens downward, and further toward the opening 15 formed on the front and rear surfaces of the housing 5. Open. The seat portion 12 is in contact with the inner back wall of the mounting groove 3 to define the insertion limit of the housing 5, and a recess for reducing the thickness is formed on the front and rear surfaces thereof and the upper surface of the upper structure portion 11. is there.

上構造部１２には、先に述べたビス４用のビス挿通穴１７が左右に貫通する状態で形成してある。また、側端壁１０には、ビス挿通穴１７の側から順に、前後調整ねじ４７用の挿通穴１８と、前後方向に長い逃げ溝１９と、高さ調整ねじ４１用の操作窓２０および挿通穴２１が形成してある。側端壁１０の前後には、抜止め片４４・５７を組むための装着溝２２・２３が前後貫通状に形成してある。前後壁１３・１４には、左右方向に長いガイド溝２４と、後述する揺動軸４０を支持する軸受穴２５とが形成してある。 The upper structure portion 12 is formed with the aforementioned screw insertion holes 17 for the screws 4 penetrating left and right. Further, in the side end wall 10 in order from the screw insertion hole 17 side, the insertion hole 18 for the front / rear adjustment screw 47, the escape groove 19 long in the front / rear direction, the operation window 20 for the height adjustment screw 41, and the insertion A hole 21 is formed. At the front and rear of the side end wall 10, mounting grooves 22 and 23 for assembling the retaining pieces 44 and 57 are formed so as to penetrate the front and rear. The front and rear walls 13 and 14 are formed with a guide groove 24 that is long in the left-right direction and a bearing hole 25 that supports a swing shaft 40 described later.

車輪枠７は、車輪８の前後を覆う概ね四角形状の前枠壁２８および後枠壁２９と、これら両者の上端を繋ぐ上壁３０とを一体に備えたプレス成形品（金属成形品）からなる。図３に示すように、前枠壁２８および後枠壁２９には、ベース壁３１と、ベース壁３１から前後に膨出される４半円状の車輪カバー部３２と、ベース壁３１から前後に凹み形成される受動ブロック４９用の受け座３３とが形成してある。受け座３３には、揺動軸４０で支持される揺動穴３５が形成され、車輪カバー部３２の下隅には車軸３８を支持する車軸穴３６が形成してある。また、高さ調整機構の雌ねじ体４２を装着するための鼓状の連結穴３７が、揺動穴３５の下方に隣接する状態でベース壁３１に形成してある。なお、ベース壁３１、車輪カバー部３２、および受け座３３の前後間隔は、それぞれ前後調整ねじ４１のねじ部直径と、車輪８の前後厚みと、受動ブロック４９の前後厚みを基準にして設定してある。 The wheel frame 7 is a press-molded product (metal molded product) integrally provided with a substantially rectangular front frame wall 28 and a rear frame wall 29 that cover the front and rear of the wheel 8 and an upper wall 30 that connects the upper ends of both. Become. As shown in FIG. 3, the front frame wall 28 and the rear frame wall 29 include a base wall 31, a semicircular wheel cover portion 32 that bulges back and forth from the base wall 31, and front and back from the base wall 31. A recess 33 for the passive block 49 is formed. A swing hole 35 that is supported by the swing shaft 40 is formed in the receiving seat 33, and an axle hole 36 that supports the axle 38 is formed in the lower corner of the wheel cover portion 32. A drum-shaped connecting hole 37 for mounting the female screw body 42 of the height adjusting mechanism is formed in the base wall 31 so as to be adjacent to the lower side of the swing hole 35. The front-rear spacing of the base wall 31, the wheel cover 32, and the receiving seat 33 is set based on the thread diameter of the front-rear adjustment screw 41, the front-rear thickness of the wheel 8, and the front-rear thickness of the passive block 49, respectively. It is.

車輪８は、タイヤ部分がプラスチック成形品で構成してある市販品からなり、その内部にはベアリングが内蔵してある（図示していない）。図３に示すように、車輪８の周面の前後は斜めに傾斜させてあり、この傾斜面の外縁寄りをガイドレール２の傾斜面で受け止めることにより、車輪８をガイドレール２で転動案内している。車輪８の直径寸法は２６ｍｍ、前後厚みは８ｍｍである。車輪８を車輪枠７の前後枠壁２８・２９の間に組み付け、車軸穴３６および車輪８に挿通した車軸３８の軸端をかしめることにより、車輪８が車輪枠７で車軸３８を介して回転自在に支持される。 The wheel 8 is made of a commercial product having a tire portion made of a plastic molded product, and a bearing is built therein (not shown). As shown in FIG. 3, the front and rear of the circumferential surface of the wheel 8 are inclined obliquely, and the wheel 8 is guided to roll by the guide rail 2 by receiving the outer edge of the inclined surface by the inclined surface of the guide rail 2. is doing. The wheel 8 has a diameter of 26 mm and a front-rear thickness of 8 mm. By assembling the wheel 8 between the front and rear frame walls 28 and 29 of the wheel frame 7 and caulking the axle end of the axle hole 36 and the axle 38 inserted into the wheel 8, the wheel 8 is connected to the wheel frame 7 via the axle 38. It is supported rotatably.

車輪枠７は、収容部６内に組み込まれて、ハウジング５に設けた揺動軸４０で上下揺動自在に支持する。詳しくは、ハウジング５の軸受穴２５と、車輪枠７の揺動穴３５と、後述する受動ブロック４９に揺動軸４０を挿通して、その一方の軸端をかしめることにより、車輪枠７が揺動軸４０のまわりに揺動可能に軸支される。この状態の揺動軸４０は収容部６の上下中途部に位置しており（図１参照）、車輪枠７の車輪カバー部３２は開放口１５に囲まれる空間に臨んでいる。なお、開放口１５は、車輪枠７の上下揺動領域の全領域において、車輪カバー部３２を露出できるように、前後壁１３・１４を斜めに大きく切り欠いて形成してある。 The wheel frame 7 is incorporated in the housing portion 6 and supported by a swing shaft 40 provided in the housing 5 so as to be swingable up and down. Specifically, the wheel frame 7 is inserted into the bearing hole 25 of the housing 5, the rocking hole 35 of the wheel frame 7, and a passive block 49 described later by caulking the rocking shaft 40 and caulking one of its shaft ends. Is pivotally supported around the swing shaft 40 so as to be swingable. The swinging shaft 40 in this state is located in the middle of the housing 6 (see FIG. 1), and the wheel cover 32 of the wheel frame 7 faces the space surrounded by the opening 15. Note that the opening 15 is formed by cutting the front and rear walls 13 and 14 diagonally greatly so that the wheel cover portion 32 can be exposed in the entire vertical swing region of the wheel frame 7.

ハウジング５に設けた揺動軸４０を基準にして、これより下方に高さ調整機構を配置し、揺動軸４０より上側の収容部６の空間を利用して前後調整機構を配置している。高さ調整機構は、高さ調整ねじ４１と、高さ調整ねじ４１で往復操作される雌ねじ体４２を調整要素にして構成する。高さ調整ねじ４１はステンレス製のビスからなり、操作頭部側の軸端に小径軸部４３が形成してある。小径軸部４３を含むねじ軸の長さは１４ｍｍであり、ハウジングを左右に貫通する従来の高さ調整ねじに比べて、ねじの全長を充分に小さくできる。雌ねじ体４２は、四角形に打ち抜いた鋼板の中央にねじ穴を形成した板ナットからなる。 The height adjustment mechanism is disposed below the swing shaft 40 provided in the housing 5, and the front / rear adjustment mechanism is disposed using the space of the accommodating portion 6 above the swing shaft 40. . The height adjustment mechanism includes a height adjustment screw 41 and a female screw body 42 reciprocated by the height adjustment screw 41 as adjustment elements. The height adjusting screw 41 is made of a stainless steel screw, and a small diameter shaft portion 43 is formed at the shaft end on the operation head side. The length of the screw shaft including the small-diameter shaft portion 43 is 14 mm, and the total length of the screw can be made sufficiently smaller than a conventional height adjusting screw that penetrates the housing from side to side. The female screw body 42 is composed of a plate nut in which a screw hole is formed in the center of a steel plate punched out into a quadrangle.

雌ねじ体４２を車輪枠７の連結穴３７に組み付け、ハウジング５の挿通穴２１に挿通した高さ調整ねじ４１を雌ねじ体４２にねじ込む。さらに、図１および図６に示すように、抜止め片４４を装着溝２３から差し込んで、その溝を高さ調整ねじ４１の小径軸部４３に係合することにより、高さ調整ねじ４１を前後移動可能な状態で、回転自在に支持できる。この状態の高さ調整ねじ４１は、側端壁１０で片持ち支持されている。 The female screw body 42 is assembled into the connection hole 37 of the wheel frame 7, and the height adjusting screw 41 inserted through the insertion hole 21 of the housing 5 is screwed into the female screw body 42. Further, as shown in FIG. 1 and FIG. 6, the height adjusting screw 41 is inserted by inserting the retaining piece 44 from the mounting groove 23 and engaging the groove with the small diameter shaft portion 43 of the height adjusting screw 41. In a state where it can move back and forth, it can be rotatably supported. The height adjusting screw 41 in this state is cantilevered by the side end wall 10.

高さ調整ねじ４１をねじ込み操作すると、車輪枠７が雌ねじ体４２を介して側端壁１０の側へ引き寄せられるので、図１において車輪枠７は揺動軸４０のまわりに半時計回転方向へ揺動して、車輪８をハウジング５の下方へ進出変位できる。高さ調整ねじ４１を逆向きに緩める側へ操作すると、車輪枠７は揺動軸４０のまわりに時計回転方向へ揺動して、車輪８を収容部６の内方へ退入変位させることができる。図７に、車輪８が上側限界位置まで退入変位した状態を実線で、車輪８が下側限界位置まで進出変位した状態を想像線で示している。高さ調整機構による全調整寸法は６ｍｍである。実際の調整時には、車輪８がガイドレール２で支持された状態で高さ調整を行なうので、高さ調整ねじ４１を正逆いずれかへ回転操作すると、戸パネル１が上下動することになる。 When the height adjusting screw 41 is screwed in, the wheel frame 7 is drawn toward the side end wall 10 via the female screw body 42, and therefore the wheel frame 7 in FIG. By oscillating, the wheel 8 can be displaced forwardly below the housing 5. When the height adjustment screw 41 is operated to loosen in the opposite direction, the wheel frame 7 swings clockwise around the swinging shaft 40 to displace the wheel 8 inwardly of the housing portion 6. Can do. In FIG. 7, a state where the wheel 8 is retreated to the upper limit position is indicated by a solid line, and a state where the wheel 8 is advanced to the lower limit position is indicated by an imaginary line. The total adjustment dimension by the height adjustment mechanism is 6 mm. At the time of actual adjustment, the height adjustment is performed in a state where the wheels 8 are supported by the guide rails 2. Therefore, when the height adjustment screw 41 is rotated to either the forward or reverse direction, the door panel 1 moves up and down.

前後調整機構は、操作ブロック４６と、操作ブロック４６を左右操作する前後調整ねじ４７と、操作ブロック４６に組み込まれる雌ねじ体４８と、揺動軸４０で前後スライド自在に案内される受動ブロック４９と、操作ブロック４６と受動ブロック４９との間に設けられるカム構造などで構成する。 The front / rear adjustment mechanism includes an operation block 46, a front / rear adjustment screw 47 for operating the operation block 46 left and right, a female screw body 48 incorporated in the operation block 46, and a passive block 49 guided by the swing shaft 40 so as to be slidable back and forth. A cam structure provided between the operation block 46 and the passive block 49 is used.

図３に示すように、操作ブロック４６は直方体状のプラスチック成形品からなり、その上半部に前後調整ねじ４７用の逃げ穴５０と、スライドピン５１用のピン穴５２とが、互いに直交する状態で形成してある。逃げ穴５０の開口端寄りには、雌ねじ体４８用の装着溝５４が上向きに開口する状態で形成してある。さらに、操作ブロック４６の下面には、カム構造を構成する斜めのカム溝５５が下向きに開口する状態で形成してある。前後調整ねじ４７はステンレス製のビスからなり、皿形に形成した操作頭部側の軸端に小径軸部５６が形成してある。雌ねじ体４８は、四角形に打ち抜いた鋼板の中央にねじ穴を形成した板ナットからなる。 As shown in FIG. 3, the operation block 46 is formed of a rectangular parallelepiped plastic molded product, and an escape hole 50 for the front / rear adjustment screw 47 and a pin hole 52 for the slide pin 51 are orthogonal to each other in the upper half thereof. It is formed in the state. Near the opening end of the escape hole 50, a mounting groove 54 for the female screw body 48 is formed so as to open upward. Further, an oblique cam groove 55 constituting a cam structure is formed on the lower surface of the operation block 46 in a state of opening downward. The front / rear adjustment screw 47 is made of a stainless steel screw, and a small-diameter shaft portion 56 is formed at the shaft end on the operation head side formed in a dish shape. The female screw body 48 is composed of a plate nut in which a screw hole is formed in the center of a steel plate punched out into a quadrangle.

装着溝５４に雌ねじ体４８を差し込み装着し、操作ブロック４６を収容部６の上壁にあてがい、そのピン穴５２がハウジング５のガイド溝２４に臨む状態でスライドピン５１を打ち込むことにより、操作ブロック４６を左右スライドのみ自在に案内できる。この状態で、前後調整ねじ４７をハウジング５の挿通穴１８に挿通して雌ねじ体４８にねじ込む。さらに、抜止め片５７を装着溝２２から差し込んで、その溝を前後調整ねじ４７の小径軸部５６に係合することにより、前後調整ねじ４７を側端壁１０で回転自在に支持できる。組み付け状態における操作ブロック４６の前後面は、ハウジング５の前壁１３および後壁１４で受け止められている（図５参照）。 The internal thread body 48 is inserted and mounted in the mounting groove 54, the operation block 46 is applied to the upper wall of the housing portion 6, and the slide pin 51 is driven in a state where the pin hole 52 faces the guide groove 24 of the housing 5. 46 can be freely guided only to the left and right. In this state, the front / rear adjustment screw 47 is inserted into the insertion hole 18 of the housing 5 and screwed into the female screw body 48. Further, by inserting the retaining piece 57 from the mounting groove 22 and engaging the groove with the small diameter shaft portion 56 of the front / rear adjustment screw 47, the front / rear adjustment screw 47 can be rotatably supported by the side end wall 10. The front and rear surfaces of the operation block 46 in the assembled state are received by the front wall 13 and the rear wall 14 of the housing 5 (see FIG. 5).

受動ブロック４９は、ひとつの隅部が丸められた四角形状のダイキャスト成形品からなり、その上面および側端壁１０側の側面のそれぞれにカムピン５９と規制突起６０とが一体に形成してある。また、受動ブロック４９には、揺動軸４０用の挿通穴６１が前後貫通状に形成してある。受動ブロック４９は、揺動軸４０に対する前後スライド動作を円滑に行なうために、真鍮（銅合金）を形成素材としており、挿通穴６１はがたつく余地がないように仕上げてある。操作ブロック４６と受動ブロック４９の対向部分に設けたカム溝５５とカムピン５９とが協同してカム構造を構成する。 The passive block 49 is formed of a square die-cast molded product with one corner rounded, and a cam pin 59 and a regulation protrusion 60 are integrally formed on the upper surface and the side surface on the side end wall 10 side. . Further, the passive block 49 is formed with an insertion hole 61 for the oscillating shaft 40 in a front-rear direction. The passive block 49 is made of brass (copper alloy) as a forming material in order to smoothly perform the back-and-forth slide operation with respect to the swing shaft 40, and the insertion hole 61 is finished so that there is no room for rattling. A cam groove 55 and a cam pin 59 provided in a portion facing the operation block 46 and the passive block 49 cooperate to constitute a cam structure.

先に説明したように、受動ブロック４９は車輪枠７と共に揺動軸４０に組み付けられて、揺動軸４０で前後スライド自在に支持されている。組み付け状態における受動ブロック４９の前後面は、車輪枠７の受け座３３で受け止められている。また、カムピン５９は操作ブロック４６のカム溝５５に係合しており、規制突起６０は側端壁１０に設けた逃げ溝１９に係合している。したがって、操作ブロック４６が揺動軸４０のまわりに回動することはない。 As described above, the passive block 49 is assembled to the swing shaft 40 together with the wheel frame 7 and is supported by the swing shaft 40 so as to be slidable back and forth. The front and rear surfaces of the passive block 49 in the assembled state are received by the receiving seats 33 of the wheel frame 7. Further, the cam pin 59 is engaged with the cam groove 55 of the operation block 46, and the restriction projection 60 is engaged with the escape groove 19 provided on the side end wall 10. Therefore, the operation block 46 does not rotate around the swing shaft 40.

車輪８が収容部６の前後中央に位置している状態から前後調整ねじ４７をねじ込み操作すると、操作ブロック４６が側端壁１０側へ引き寄せられ、この引き寄せ距離に見合う分だけ、カム溝５５がカムピン５９を図５に矢印ａで示す向き（前側）に移動させる。また、カムピン５９の移動は受動ブロック４９を介して車輪枠７に伝えられる。したがって、車輪８の位置を収容部６の前後中央から矢印ａ側へ偏寄した位置へ移動することができる。 When the front / rear adjusting screw 47 is screwed in from the state where the wheel 8 is located at the front / rear center of the housing portion 6, the operation block 46 is pulled toward the side end wall 10, and the cam groove 55 corresponds to the pulling distance. The cam pin 59 is moved in the direction (front side) indicated by the arrow a in FIG. Further, the movement of the cam pin 59 is transmitted to the wheel frame 7 through the passive block 49. Therefore, the position of the wheel 8 can be moved from the front-rear center of the housing 6 to the position deviated toward the arrow a.

逆に、高さ調整ねじ４１を緩む側へ操作すると、操作ブロック４６が側端壁１０から遠ざかる向きに押し出され、この押し出し距離に見合う分だけ、カム溝５５がカムピン５９を図５に矢印ｂで示す向き（後側）に移動させる。このように、高さ調整ねじ４１を正逆いずれかへ回転操作することにより、戸車の前後調整を行なうことができる。図８は車輪８を後側限界位置まで調整移動した状態を示している。前後調整機構による調整寸法は、車輪８が中央に位置している状態から前後それぞれに２ｍｍである。実際の調整時には、車輪８がガイドレール２で支持された状態で前後調整を行なうので、前後調整ねじ４７を正逆いずれかへ回転操作すると、戸パネル１が前後動することになる。受動ブロック４９および車輪枠７が前後変位するのに同行して、規制突起６０および高さ調整ねじ４１を前後移動させるために、逃げ溝１９、操作窓２０、および挿通穴２１は前後に長い溝状に形成してある。 On the contrary, when the height adjusting screw 41 is operated to loosen, the operation block 46 is pushed away from the side end wall 10, and the cam groove 55 pushes the cam pin 59 into the arrow b in FIG. Move it in the direction indicated by (rear side). Thus, the front / rear adjustment of the door roller can be performed by rotating the height adjusting screw 41 forward or backward. FIG. 8 shows a state in which the wheel 8 is adjusted and moved to the rear limit position. The adjustment dimension by the front-rear adjustment mechanism is 2 mm in the front-rear direction from the state in which the wheel 8 is located in the center. At the time of actual adjustment, the front and rear adjustments are performed with the wheels 8 supported by the guide rails 2. Therefore, when the front and rear adjustment screws 47 are rotated forward or backward, the door panel 1 moves back and forth. Accompanying the passive block 49 and the wheel frame 7 moving back and forth, the escape groove 19, the operation window 20, and the insertion hole 21 are long grooves in order to move the restricting projection 60 and the height adjusting screw 41 back and forth. It is formed in a shape.

図８に示すように、車輪枠７を一方の調整限界まで調整操作した状態では、車輪カバー部３２が開放口１５の開口面に位置して、戸パネル１の装着溝３の内面に接当し、あるいは極く僅かな隙間を介して近接している。このように、開放口１５に囲まれる空間を利用して車輪枠７を前後に調整移動させると、前後の開放口１５の開口面の間で車輪枠７を前後調整できるので、車輪枠７の前調整限界と後調整限界との間の前後寸法を、装着溝３の前後幅寸法と同じにできる。したがって、本発明の戸車によれば、車輪枠７の前後調整範囲をハウジング５の前後厚みに一致させて、戸車の前後厚み寸法を１４ｍｍまで小さくすることができる。因みに、業界標準の従来の戸車の前後厚み寸法は１６〜２０ｍｍとなっている。 As shown in FIG. 8, in a state in which the wheel frame 7 is adjusted to one adjustment limit, the wheel cover portion 32 is positioned on the opening surface of the opening 15 and contacts the inner surface of the mounting groove 3 of the door panel 1. Or close to each other through a very small gap. Thus, when the wheel frame 7 is adjusted and moved back and forth using the space surrounded by the opening 15, the wheel frame 7 can be adjusted back and forth between the opening surfaces of the front and rear opening 15. The front-rear dimension between the front adjustment limit and the rear adjustment limit can be made the same as the front-rear width dimension of the mounting groove 3. Therefore, according to the door pulley of the present invention, the front-rear adjustment range of the wheel frame 7 can be matched with the front-rear thickness of the housing 5, and the front-rear thickness dimension of the door wheel can be reduced to 14 mm. Incidentally, the front and rear thickness dimension of the industry standard conventional door is 16 to 20 mm.

以上のように本発明の戸車においては、ハウジング５の側端壁１０の下半部側に高さ調整ねじ４１を配置し、高さ調整ねじ４１より上方に揺動軸４０を配置した。このような部品配置形態を採用すると、軸受穴２５の形成位置をハウジング５の前後壁１３・１４の下縁から遠ざけて、軸受穴２５の周囲壁の強度を充分に増強できる。また、軸受穴２５の周囲壁の厚み寸法をいたずらに大きくする必要もない。したがって、ダイキャスト成形されたハウジングに比べて、製造コストが少なくて済むプラスチック成形品でハウジング５を形成して、戸車の全体コストを削減しながら、軸受穴２５の周縁壁の脆弱性が解消された堅牢なハウジング５を得ることができる。 As described above, in the door pulley of the present invention, the height adjustment screw 41 is disposed on the lower half side of the side end wall 10 of the housing 5, and the swing shaft 40 is disposed above the height adjustment screw 41. When such a component arrangement form is employed, the strength of the peripheral wall of the bearing hole 25 can be sufficiently increased by moving the formation position of the bearing hole 25 away from the lower edges of the front and rear walls 13 and 14 of the housing 5. Further, it is not necessary to unnecessarily increase the thickness dimension of the peripheral wall of the bearing hole 25. Therefore, the fragility of the peripheral wall of the bearing hole 25 is eliminated while the housing 5 is formed of a plastic molded product that requires less manufacturing cost than a die-cast molded housing, and the overall cost of the door wheel is reduced. A robust housing 5 can be obtained.

また、本発明の戸車においては、開放口１５で囲まれる空間を利用して車輪枠７を前後に調整移動させるので、車輪枠７の前後調整をハウジング５の前後厚みの範囲内で行なうことができる。さらに、前枠壁２８および後枠壁２９を、ベース壁３１と、車輪カバー部３２と、受け座３３とで構成することにより、各壁部３１〜３３の前後寸法を最小化して、車輪枠７の各部の前後寸法が無駄に大きくなるのを解消できる。こうした戸車によれば、車輪枠の全体をハウジングの収容部に収容する従来形態の戸車に比べて、ハウジング５の前壁１３および後壁１４の合計厚み分だけ戸車の前後厚みを小さくできる。したがって、前後厚みが小さな薄型の戸パネルに適用するのに好適な戸車とすることができる。 Further, in the door pulley of the present invention, the wheel frame 7 is adjusted and moved back and forth using the space surrounded by the opening 15, so that the front and rear adjustment of the wheel frame 7 can be performed within the range of the front and rear thickness of the housing 5. it can. Further, by configuring the front frame wall 28 and the rear frame wall 29 with the base wall 31, the wheel cover portion 32, and the receiving seat 33, the front and rear dimensions of the wall portions 31 to 33 are minimized, and the wheel frame is reduced. 7 can be prevented from becoming unnecessarily large. According to such a door wheel, the front and rear thicknesses of the door wheel can be reduced by the total thickness of the front wall 13 and the rear wall 14 of the housing 5 as compared with a conventional door wheel in which the entire wheel frame is housed in the housing housing. Therefore, it can be set as the suitable doorwheel to apply to a thin door panel with small front-back thickness.

上記の実施例では、揺動軸４０を収容部６の上下中途部に設けたが、その必要はなく、収容部６の上半側に揺動軸４０を配置することができる。その場合には、揺動軸の下方に高さ調整ねじ４１を配置し、さらに高さ調整ねじ４１の下方に前後調整機構を配置することができる。高さ調整機構は、ラックおよびピニオンを機構要素にして構成することができ、実施例で説明したカム溝５５とカムピン５９とからなるカム構造に限定するものではない。 In the above embodiment, the swing shaft 40 is provided in the middle of the upper and lower portions of the housing portion 6, but it is not necessary, and the swing shaft 40 can be disposed on the upper half side of the housing portion 6. In that case, the height adjustment screw 41 can be disposed below the swing shaft, and the front-rear adjustment mechanism can be disposed below the height adjustment screw 41. The height adjusting mechanism can be configured using a rack and a pinion as mechanism elements, and is not limited to the cam structure including the cam groove 55 and the cam pin 59 described in the embodiment.

車輪枠７は、必要があればダイキャスト成形品、あるいは金属部品がインサートされたプラスチック成形品などの金属成形品で形成することができる。同様に、揺動軸４０用の軸受穴２５を備えたプレス金具をハウジング５にインサート固定して、ハウジング５の脆弱性を克服することができる。ハウジング５を装着溝３に固定するビス４は、戸パネル１の下面側からねじ込む形態を採ることができる。必要があれば、側端壁１０の上端に設けた締結座をビス４で締結することができる。雌ねじ体４２・４８は、板ナットで形成する必要はなく、ねじ穴が貫通形成してある丸軸で構成することができる。 If necessary, the wheel frame 7 can be formed of a die-cast molded product or a metal molded product such as a plastic molded product in which metal parts are inserted. Similarly, the fragility of the housing 5 can be overcome by insert-fixing a press fitting having a bearing hole 25 for the swing shaft 40 to the housing 5. The screw 4 that fixes the housing 5 to the mounting groove 3 can be screwed from the lower surface side of the door panel 1. If necessary, the fastening seat provided at the upper end of the side end wall 10 can be fastened with the screw 4. The female screw bodies 42 and 48 need not be formed of plate nuts, but can be formed of a round shaft through which a screw hole is formed.

５ハウジング
６収容部
７車輪枠
８車輪
１０側端壁
１５開放口
４０揺動軸
４１高さ調整ねじ
４２雌ねじ体 5 Housing 6 Housing 7 Wheel Frame 8 Wheel 10 Side End Wall 15 Open Port 40 Oscillating Shaft 41 Height Adjustment Screw 42 Female Screw Body

Claims

プラスチック成形品からなるハウジング（５）と、ハウジング（５）内の収容部（６）に配置される車輪枠（７）および車輪（８）と、車輪枠（７）とハウジング（５）との間に設けられる高さ調整機構、および前後調整機構とを備えている戸車であって、
車輪枠（７）は、ハウジング（５）に設けた揺動軸（４０）で上下揺動可能に支持されており、
高さ調整機構は、前記収容部（６）に臨む側端壁（１０）で回転自在に支持される高さ調整ねじ（４１）と、車輪枠（７）に装着されて、高さ調整ねじ（４１）で往復操作される雌ねじ体（４２）を含み、
前記側端壁（１０）の下半部側に高さ調整ねじ（４１）を配置して、高さ調整ねじ（４１）より上方に揺動軸（４０）が配置してあることを特徴とする戸車。 A housing (5) made of a plastic molded product, a wheel frame (7) and a wheel (8) disposed in a housing part (6) in the housing (5), a wheel frame (7) and the housing (5) A height adjustment mechanism provided in between and a front and rear adjustment mechanism,
The wheel frame (7) is supported by a swing shaft (40) provided on the housing (5) so as to be swingable up and down.
The height adjusting mechanism is mounted on a height adjusting screw (41) that is rotatably supported by a side end wall (10) facing the housing portion (6) and a wheel frame (7), and is provided with a height adjusting screw. Including a female screw body (42) reciprocated in (41),
A height adjustment screw (41) is disposed on the lower half side of the side end wall (10), and a swing shaft (40) is disposed above the height adjustment screw (41). A door-to-door.

高さ調整ねじ（４１）が前記側端壁（１０）で片持ち支持されており、
揺動軸（４０）が、前記収容部（６）の上下中途部に配置されて、揺動軸（４０）より上側の空間に前後調整機構が配置されており、
車輪枠（７）の上下揺動領域に臨むハウジング（５）の前後面に、車輪枠（７）の一部を露出させる開放口（１５）が形成されており、
前後の開放口（１５）の開口面の間で、車輪枠（７）を前後調整機構で前後調整できる請求項１に記載の戸車。 A height adjusting screw (41) is cantilevered by the side end wall (10),
The swing shaft (40) is disposed in the middle of the upper and lower portions of the housing portion (6), and a front / rear adjustment mechanism is disposed in a space above the swing shaft (40),
An opening (15) for exposing a part of the wheel frame (7) is formed on the front and rear surfaces of the housing (5) facing the up and down swing region of the wheel frame (7),
The door wheel according to claim 1, wherein the wheel frame (7) can be adjusted in the front-rear direction by a front-rear adjustment mechanism between the opening surfaces of the front-rear opening ports (15).

前後調整機構が、ハウジング（５）の前壁（１３）および後壁（１４）で左右スライド自在に案内される操作ブロック（４６）と、
前記側端壁（１０）で回転のみ自在に支持されて、操作ブロック（４６）を雌ねじ体（４８）を介して左右操作する前後調整ねじ（４７）と、
揺動軸（４０）で前後スライド自在に案内される受動ブロック（４９）と、
操作ブロック（４６）と受動ブロック（４９）との間に設けられて、操作ブロック（４６）の左右動作を受動ブロック（４９）の前後動作に変換するカム構造とで構成されており、
前記カム構造が、操作ブロック（４６）と受動ブロック（４９）の対向部分に設けた、カム溝（５５）とカムピン（５９）とで構成してある請求項１または２に記載の戸車。 An operation block (46) in which a front-rear adjustment mechanism is guided by a front wall (13) and a rear wall (14) of the housing (5) so as to be slidable left and right;
A front / rear adjustment screw (47) supported by the side end wall (10) so as to be rotatable only and operating the operation block (46) left and right via the female screw body (48);
A passive block (49) guided slidably forward and backward by a swing shaft (40);
The cam block is provided between the operation block (46) and the passive block (49) and converts the left-right motion of the operation block (46) into the front-back motion of the passive block (49).
The door roller according to claim 1 or 2, wherein the cam structure is constituted by a cam groove (55) and a cam pin (59) provided in an opposing portion of the operation block (46) and the passive block (49).