JP7055367B2

JP7055367B2 - Bogie

Info

Publication number: JP7055367B2
Application number: JP2018095803A
Authority: JP
Inventors: 一輝春日
Original assignee: Sanko Co Ltd
Current assignee: Sanko Co Ltd
Priority date: 2018-05-18
Filing date: 2018-05-18
Publication date: 2022-04-18
Anticipated expiration: 2038-05-18
Also published as: JP2019199216A

Description

本開示は、台盤の下面のスライド係合部にキャスターの座板がスライド挿入されると共に、そのスライド係合部の隣のリテーナ受容部にリテーナが受容されて座板がスライド係合部に抜け止めされる台車に関する。 In the present disclosure, the seat plate of the caster is slide-inserted into the slide engaging portion on the lower surface of the pedestal, and the retainer is received by the retainer receiving portion next to the slide engaging portion, so that the seat plate becomes the slide engaging portion. Regarding the dolly that is prevented from coming off.

この種の従来の台車として、リテーナが、一側面に係合突部を有し、その反対側の側面に弾性係合片を有するものが知られている。そのリテーナは、係合突部がスライド係合部の入口部に係合された状態で、その係合突部を中心に回動操作されてリテーナ受容部に押し込まれる。そして、弾性係合片がリテーナ受容部の被係合部に係合してリテーナがリテーナ受容部内に保持される（例えば、特許文献１参照）。 As a conventional trolley of this type, a retainer having an engaging protrusion on one side surface and an elastic engaging piece on the opposite side surface is known. The retainer is pushed into the retainer receiving portion by being rotated around the engaging protrusion in a state where the engaging protrusion is engaged with the inlet portion of the slide engaging portion. Then, the elastic engaging piece engages with the engaged portion of the retainer receiving portion, and the retainer is held in the retainer receiving portion (see, for example, Patent Document 1).

特許第５９７５９３５号公報（図７～図１０）Japanese Patent No. 5975935 (FIGS. 7 to 10)

しかしながら、上記した従来の台車では、荷物の荷重による台盤の変形や、走行時の衝撃等により、上記係合突部の係合が外れてリテーナがリテーナ受容部から脱落することが考えられ、それに対処すべく、従来より組付強度が高い台車の開発が求められている。 However, in the above-mentioned conventional trolley, it is conceivable that the engagement of the engagement protrusion may be disengaged and the retainer may fall off from the retainer receiving portion due to deformation of the pedestal due to the load of luggage, impact during traveling, or the like. In order to deal with this, it is required to develop a dolly with higher assembly strength than before.

上記課題を解決するためになされた請求項１の発明は、台盤の下面に備えたスライド係合部にキャスターの座板がスライド挿入されてから、前記スライド係合部の隣のリテーナ受容部にリテーナが受容されて、前記座板が前記リテーナにより前記スライド係合部に抜け止めされる台車において、前記リテーナ受容部の内側面に開口する第１係合孔と、前記リテーナの一側面から突出して前記第１係合孔に係合し、前記リテーナ受容部に対する前記リテーナの回動支点となる第１係合突部と、前記リテーナと前記リテーナ受容部とに形成されて、少なくとも一方の弾性変形を経て互いに係合し、前記リテーナが前記リテーナ受容部から離脱する方向への回動を規制する回動係合部と、前記第１係合突部の先端部から下方に突出する第１返し突部と、前記台盤に形成され、前記第１返し突部と対向して前記第１係合突部を前記第１係合孔に抜け止めする第１被係止部と、を備える台車である。 The invention of claim 1 made to solve the above-mentioned problems is that after the seat plate of the caster is slide-inserted into the slide engaging portion provided on the lower surface of the pedestal, the retainer receiving portion next to the slide engaging portion is provided. In a carriage in which the retainer is received and the seat plate is prevented from coming off by the retainer to the slide engaging portion, the first engaging hole that opens to the inner surface of the retainer receiving portion and one side surface of the retainer. A first engaging protrusion that protrudes and engages with the first engaging hole and serves as a rotation fulcrum of the retainer with respect to the retainer receiving portion, and at least one of the retainer and the retainer receiving portion. A rotation engaging portion that engages with each other through elastic deformation and restricts rotation of the retainer in a direction away from the retainer receiving portion, and a second portion that protrudes downward from the tip of the first engaging protrusion. A 1 return protrusion and a first locked portion formed on the pedestal and facing the first return protrusion to prevent the first engagement protrusion from coming off the first engagement hole. It is a trolley to prepare.

請求項２の発明は、前記回動係合部同士が係合した状態で、前記第１返し突部と前記第１被係止部とが当接し得る請求項１に記載の台車である。 The invention according to claim 2 is the trolley according to claim 1, wherein the first return protrusion portion and the first locked portion can come into contact with each other in a state where the rotation engaging portions are engaged with each other.

請求項３の発明は、前記第１係合突部は、前記リテーナの前記一側面の上下方向の途中位置に配置され、前記リテーナの前記一側面のうち前記第１係合突部より下側には、前記第１係合突部から下方に離れるに従って前記リテーナ受容部の内側面から離れるように傾斜する干渉回避斜面が形成されている請求項１又は２に記載の台車である。 According to the third aspect of the present invention, the first engaging protrusion is arranged at a position in the middle of the one side surface of the retainer in the vertical direction, and is below the first engaging protrusion of the one side surface of the retainer. The trolley according to claim 1 or 2, wherein an interference avoidance slope is formed which is inclined so as to be separated from the inner side surface of the retainer receiving portion as the distance from the first engaging protrusion is downward.

請求項４の発明は、前記リテーナの前記回動係合部は、片持ち梁構造をなしかつその先端側に第２係合突部を有する弾性係合片であり、前記リテーナ受容部の前記回動係合部は、前記第２係合突部が凹凸係合する第２係合孔であり、前記第２係合突部の先端部から下方に突出する第２返し突部と、前記台盤に形成され、前記第２返し突部と対向して前記第２係合突部を前記第２係合孔に抜け止めする第２被係止部と、を備える請求項１乃至３の何れか１の請求項に記載の台車である。 The invention of claim 4 is an elastic engaging piece having a cantilever structure and a second engaging protrusion on the tip end side thereof, and the rotating engaging portion of the retainer is the elastic engaging portion of the retainer receiving portion. The rotary engaging portion is a second engaging hole in which the second engaging protrusion is unevenly engaged, and the second return protrusion protruding downward from the tip of the second engaging protrusion and the said portion. 13. The trolley according to any one claim.

請求項５の発明は、前記リテーナの回動軸方向と前記スライド挿入方向とが略平行になっている請求項１乃至４の何れか１の請求項に記載の台車である。 The invention according to claim 5 is the trolley according to claim 1, wherein the rotation axis direction of the retainer and the slide insertion direction are substantially parallel to each other.

請求項６の発明は、前記リテーナは、上下方向に平行に延びる第１と第２の角筒部の下端部同士の間を連絡部で連絡してなる本体部を有し、前記第１係合突部は、前記第１の角筒部に配置される一方、前記回動係合部は、前記第２の角筒部に配置されている請求項１乃至５の何れか１の請求項に記載の台車である。 According to the sixth aspect of the present invention, the retainer has a main body portion in which the lower ends of the first and second square cylinder portions extending in parallel in the vertical direction are connected to each other by a connecting portion, and the first section is described. The aspect according to any one of claims 1 to 5, wherein the collision portion is arranged in the first square cylinder portion, while the rotation engaging portion is arranged in the second square cylinder portion. It is a trolley described in.

請求項１の台車では、第１係合突部の先端部から第１返し突部が下方に突出し、その第１返し突部が、台盤の第１被係止部に対向するので、第１係合突部と第１係合孔との係合が外れ難くなり、組付強度が従来より高くなる。 In the bogie of claim 1, the first return protrusion protrudes downward from the tip of the first engagement protrusion, and the first return protrusion faces the first locked portion of the pedestal. 1 The engagement between the engaging protrusion and the first engaging hole becomes difficult to disengage, and the assembling strength becomes higher than before.

なお、第１返し突部と第１被係止部とは、リテーナ及びリテーナ受容部の回動係合部同士が係合した状態で、クリアランスの範囲で当接し得なくてもよいが、当接し得る構成としてもよい（請求項２の発明）。第１返し突部と第１被係止部とが当接し得る構成であれば、それらの反対側で互いに係合する回動係合部に対する負荷が軽減される。 It should be noted that the first return protrusion portion and the first locked portion may not come into contact with each other within the clearance range in a state where the retainer and the rotation engaging portion of the retainer receiving portion are engaged with each other. It may be a structure that can be contacted (invention of claim 2). If the first return protrusion and the first locked portion can be in contact with each other, the load on the rotationally engaged portions that engage with each other on the opposite sides thereof is reduced.

請求項３の台車では、リテーナの一側面のうち第１係合突部より下側に干渉回避斜面が形成されているので、リテーナ受容部に対するリテーナの回動範囲が広くなってリテーナの組み付け時の回動操作が容易になる。 In the trolley according to claim 3, since the interference avoidance slope is formed on the lower side of one side surface of the retainer from the first engaging protrusion, the rotation range of the retainer with respect to the retainer receiving portion is widened and the retainer is assembled. The rotation operation of is easy.

請求項４の台車では、リテーナの回動係合部として備えられた弾性係合片の第２係合突部に第２返し突部が備えられ、台盤に、第２返し突部と対向して第２係合突部を第２係合孔に抜け止めする第２被係止部が備えられているので、第１係合突部と第２係合突部との両方の係合が外れ難くなり、組付強度が高くなる。 In the trolley according to claim 4, a second return protrusion is provided on the second engagement protrusion of the elastic engaging piece provided as the rotation engagement portion of the retainer, and the base is opposed to the second return protrusion. Since the second locked portion for preventing the second engaging protrusion from coming off to the second engaging hole is provided, both the first engaging protrusion and the second engaging protrusion are engaged with each other. Is hard to come off and the assembly strength is high.

請求項５の構成のように、リテーナの回動軸方向とスライド挿入方向とを略平行にすれば、スライド係合部に係合した座板からリテーナが受ける負荷が、リテーナを回動させる力として作用し難くなる。即ち、リテーナによるリテーナ受容部の抜け止め機能が高くなる。 If the rotation axis direction of the retainer and the slide insertion direction are made substantially parallel as in the configuration of claim 5, the load received by the retainer from the seat plate engaged with the slide engaging portion causes the retainer to rotate. It becomes difficult to act as. That is, the retainer's retaining function of the retainer receiving portion is enhanced.

請求項６の台車では、本体部が、上下方向に延びる第１と第２の角筒部の下端部同士の間を連絡部で連絡してなり、負荷を第１と第２の角筒部で分散して受け止めることができ、強度アップが図られる。 In the dolly of claim 6, the main body portion communicates between the lower ends of the first and second square cylinder portions extending in the vertical direction by a connecting portion, and the load is applied to the first and second square cylinder portions. It can be dispersed and received, and the strength can be increased.

本開示の第１実施形態に係る台車の下面側斜視図Bottom view of the dolly according to the first embodiment of the present disclosure. 第１と第２のキャスターの斜視図Perspective view of the first and second casters キャスター支持部及びリテーナ受容部の斜視図Perspective view of caster support and retainer receiving part 座板がスライド係合したスライド係合部の斜視図Perspective view of the slide engagement part where the seat plate is slide-engaged リテーナを受容したリテーナ受容部の斜視図Perspective view of the retainer receiving part that received the retainer リテーナの上面側の斜視図Top view of the retainer リテーナの下面側の斜視図Perspective view of the underside of the retainer リテーナの組み付け時の初期段階の側断面図Side cross section of the initial stage when assembling the retainer リテーナの組み付け時の途中段階の側断面図Side cross-sectional view of the intermediate stage when assembling the retainer リテーナの組み付けが完了した状態の側断面図Side sectional view of the state where the retainer assembly is completed 本開示の第２実施形態の第２係合突部の側断面図Side sectional view of the second engaging protrusion of the second embodiment of the present disclosure.

［第１実施形態］
以下、図１～図１０には、本実施形態の台車１０が示されている。この台車１０の台盤１１は、例えば、樹脂の射出成形品であって、図１に示すように、平面形状が長方形の天板１２を有する。天板１２の下面には、縦方向Ｈ１に延びる複数の縦リブ１４Ａと、横方向Ｈ２に延びる複数の横リブ１４Ｂとが備えられている。また、天板１２の下面外縁部からは、側壁１３が垂下されて縦リブ１４Ａ及び横リブ１４Ｂを包囲している。さらに、台盤１１の縦横の中央には、持手孔１５が備えられている。 [First Embodiment]
Hereinafter, FIGS. 1 to 10 show the dolly 10 of the present embodiment. The pedestal 11 of the trolley 10 is, for example, an injection-molded product of resin, and has a top plate 12 having a rectangular planar shape as shown in FIG. The lower surface of the top plate 12 is provided with a plurality of vertical ribs 14A extending in the vertical direction H1 and a plurality of horizontal ribs 14B extending in the horizontal direction H2. Further, a side wall 13 hangs down from the outer edge of the lower surface of the top plate 12 to surround the vertical ribs 14A and the horizontal ribs 14B. Further, a handle hole 15 is provided in the center of the base 11 in the vertical and horizontal directions.

台盤１１の下面四隅には、キャスター支持部２０が備えられている。本実施形態では、台盤１１の縦方向Ｈ１の一端側の１対のキャスター支持部２０には、車輪９０が旋回不能な第１のキャスター９１が取り付けられ、他端側の１対のキャスター支持部２０には、車輪９０が旋回可能な第２のキャスター９５が取り付けられている。 Caster support portions 20 are provided at the four corners of the lower surface of the pedestal 11. In the present embodiment, a first caster 91 on which the wheel 90 cannot turn is attached to a pair of caster support portions 20 on one end side of the base 11 in the vertical direction H1, and a pair of caster supports on the other end side. A second caster 95 on which the wheel 90 can turn is attached to the portion 20.

具体的には、第１のキャスター９１は、車軸９０Ｓを支持する１対の脚部９３，９３が、長方形の座板９２の１対の対辺から下方に直角曲げされた構造をなしている。また、各脚部９３の上端部は、座板９２の一辺より短くなっていて、座板９２のうち脚部９３との折り曲げ線は、座板９２の外縁部より内側に位置している。そして、座板９２のうち各脚部９３を挟んだ両側に突片９２Ａ，９２Ａが備えられている。 Specifically, the first caster 91 has a structure in which a pair of legs 93, 93 supporting the axle 90S are bent downward at right angles from a pair of opposite sides of the rectangular seat plate 92. Further, the upper end portion of each leg portion 93 is shorter than one side of the seat plate 92, and the bending line of the seat plate 92 with the leg portion 93 is located inside the outer edge portion of the seat plate 92. The projecting pieces 92A and 92A are provided on both sides of the seat plate 92 with the leg portions 93 interposed therebetween.

一方、第２のキャスター９５は、長方形の座板９６の下面にセンタープレート９７Ｂが旋回可能に連結されている。そして、車軸９０Ｓを支持する１対の脚部９７Ａ，９７Ａがセンタープレート９７Ｂから下方に直角曲げされた構造をなしている。 On the other hand, in the second caster 95, the center plate 97B is rotatably connected to the lower surface of the rectangular seat plate 96. A pair of legs 97A and 97A that support the axle 90S are bent downward from the center plate 97B at a right angle.

図１に示すように、前述した台盤１１の下面四隅のキャスター支持部２０は、台盤１１の長手方向の一端寄り位置と他端寄り位置とにおいてそれぞれ隣り合う１対の横リブ１４Ｂ，１４Ｂの間に配置されて、台盤１１の縦横の両方向Ｈ１，Ｈ２で対称に配置されている。 As shown in FIG. 1, the caster support portions 20 at the four corners of the lower surface of the pedestal 11 described above have a pair of lateral ribs 14B and 14B that are adjacent to each other at one end side position and the other end side position in the longitudinal direction of the pedestal plate 11, respectively. It is arranged between the two, and is symmetrically arranged in both the vertical and horizontal directions H1 and H2 of the pedestal 11.

具体的には、キャスター支持部２０を間に有する１対の横リブ１４Ｂ，１４Ｂには、それらの長手方向の両端寄り位置から下方に突出する台形突部２４，２４が備えられている。また、図３に示すように、１対の横リブ１４Ｂ，１４Ｂのうち台形突部２４，２４を有する部分は、一端部同士の間を第１連絡リブ２１によって連絡されると共に、一端部寄り位置同士の間を第２連絡リブ２２によって連絡され、さらに、他端部同士の間を第３連絡リブ２３によって連絡されている。そして、第１連絡リブ２１と第２連絡リブ２２と１対の横リブ１４Ｂ，１４Ｂにより四方を囲まれた部分がリテーナ受容部３０をなし、第２連絡リブ２２と第３連絡リブ２３と１対の横リブ１４Ｂ，１４Ｂとにより四方を囲まれた部分がキャスター支持部２０をなしている。なお、キャスター支持部２０よりリテーナ受容部３０が、台盤１１における横方向Ｈ２の中央側に配置されている。 Specifically, the pair of lateral ribs 14B and 14B having the caster support portions 20 in between are provided with trapezoidal protrusions 24 and 24 protruding downward from positions near both ends in the longitudinal direction thereof. Further, as shown in FIG. 3, of the pair of horizontal ribs 14B and 14B, the portions having the trapezoidal protrusions 24 and 24 are connected between the one ends by the first connecting rib 21 and are close to one end. The positions are connected to each other by the second connecting rib 22, and the other ends are connected to each other by the third connecting rib 23. The portion surrounded on all sides by the first connecting rib 21 and the second connecting rib 22 and the pair of lateral ribs 14B and 14B forms the retainer receiving portion 30, and the second connecting rib 22 and the third connecting rib 23 and 1 are formed. The portion surrounded on all sides by the pair of lateral ribs 14B and 14B forms the caster support portion 20. The retainer receiving portion 30 is arranged on the base 11 on the center side of the lateral direction H2 from the caster supporting portion 20.

第１及び第２の連絡リブ２１，２２の下面は、台形突部２４の下面より僅かに上方に位置している。また、第１連絡リブ２１のうち第２連絡リブ２２との対向面の幅方向の中央部分は、僅かに段付き状に陥没している。さらに、第２連絡リブ２２は、表裏及び下面の何れにおいても幅方向の中央部分が僅かに段付き状に陥没している。そして、第１連絡リブ２１の下面と、第２連絡リブ２２の幅方向の両端部の下面とが面一になっている。また、横リブ１４Ｂ，１４Ｂの間で、１対の第１連絡リブ２１，２１の間に配置されている複数の縦リブ１４Ａの下面も第１連絡リブ２１の下面と面一になっている。さらに、第２連絡リブ２２と第３連絡リブ２３との間においては、横リブ１４Ｂ，１４Ｂの対向面から互いに接近する側に複数のリブ２６が張り出し、それらリブ２６の下面も第１連絡リブ２１の下面と面一になっている。また、第２連絡リブ２２の幅方向の中心部と第３連絡リブ２３の幅方向の中心部との間は、直交リブ２７によって連絡されている。直交リブ２７の下面は、第２連絡リブ２２側の端部を除く全体が、第２連絡リブ２２の下面両端部と面一になっている。なお、直交リブ２７の下面のうち第２連絡リブ２２側の端部は、第２連絡リブ２２の下面中央部に向かって僅かに上昇するように傾斜して、その末端が第２連絡リブ２２の下面中央部分と同じ高さに位置している。 The lower surfaces of the first and second connecting ribs 21 and 22 are located slightly above the lower surface of the trapezoidal protrusion 24. Further, the central portion of the first connecting rib 21 in the width direction of the surface facing the second connecting rib 22 is slightly recessed in a stepped shape. Further, the second connecting rib 22 has a slightly stepped central portion in the width direction on both the front and back surfaces and the lower surface. The lower surface of the first connecting rib 21 and the lower surfaces of both ends of the second connecting rib 22 in the width direction are flush with each other. Further, the lower surfaces of the plurality of vertical ribs 14A arranged between the pair of first connecting ribs 21 and 21 between the horizontal ribs 14B and 14B are also flush with the lower surface of the first connecting rib 21. .. Further, between the second connecting rib 22 and the third connecting rib 23, a plurality of ribs 26 project from the facing surfaces of the lateral ribs 14B and 14B toward each other, and the lower surface of the ribs 26 is also the first connecting rib. It is flush with the lower surface of 21. Further, the central portion in the width direction of the second connecting rib 22 and the central portion in the width direction of the third connecting rib 23 are connected by an orthogonal rib 27. The entire lower surface of the orthogonal rib 27 except for the end portion on the second connecting rib 22 side is flush with both ends of the lower surface of the second connecting rib 22. The end of the lower surface of the orthogonal rib 27 on the side of the second connecting rib 22 is inclined so as to slightly rise toward the center of the lower surface of the second connecting rib 22, and the end thereof is the second connecting rib 22. It is located at the same height as the central part of the lower surface of.

第３連絡リブ２３は、上記第１及び第２の連絡リブ２１，２２等に比べて下方に大きく突出し、その下面は、台形突部２４の下面と面一になっている。また、台形突部２４，２４の対向面の下端寄り位置からは、互いに接近する側に係合突片２８，２８が張り出している。それら係合突片２８，２８は、横方向Ｈ２に延びる帯板状をなし、下面に格子状の補強リブ２８Ｂを備え、補強リブ２８Ｂの一部の下面が台形突部２４の下面と面一になっている。係合突片２８の一端部は、第３連絡リブ２３に接続され、その接続部分において、補強リブ２８Ｂの下面と第３連絡リブ２３の下面とが面一になっている。なお、係合突片２８の長手方向の中央部では、補強リブ２８Ｂが係合突片２８の先端に向かうに従って徐々に低くなっている。 The third connecting rib 23 protrudes significantly downward as compared with the first and second connecting ribs 21 and 22, and the lower surface thereof is flush with the lower surface of the trapezoidal protrusion 24. Further, from the position near the lower end of the facing surfaces of the trapezoidal protrusions 24, 24, the engaging protrusions 28, 28 project to the side approaching each other. The engaging protrusions 28, 28 have a strip-like shape extending in the lateral direction H2, and have a grid-like reinforcing rib 28B on the lower surface, and the lower surface of a part of the reinforcing rib 28B is flush with the lower surface of the trapezoidal protrusion 24. It has become. One end of the engaging protrusion 28 is connected to the third connecting rib 23, and the lower surface of the reinforcing rib 28B and the lower surface of the third connecting rib 23 are flush with each other at the connecting portion. At the central portion of the engaging projectile 28 in the longitudinal direction, the reinforcing rib 28B is gradually lowered toward the tip of the engaging projectile 28.

係合突片２８の上面は、リブ２６群及び第２連絡リブ２２の下面より僅かに下方に位置している。そして、係合突片２８の上面と、リブ２６群及び第２連絡リブ２２の下面との間に、スライド係合部３３が形成されている。なお、係合突片２８及び第２連絡リブ２２の第１連絡リブ２１側を向く面は互いに面一になっている。 The upper surface of the engaging protrusion 28 is located slightly below the lower surface of the rib 26 group and the second connecting rib 22. A slide engaging portion 33 is formed between the upper surface of the engaging projectile 28 and the lower surface of the rib 26 group and the second connecting rib 22. The surfaces of the engaging protrusion 28 and the second connecting rib 22 facing the first connecting rib 21 side are flush with each other.

図４に示すように、スライド係合部３３には、第１キャスター９１の座板９２が第２連絡リブ２２側からスライド挿入される。そして、座板９２の一側面が第３連絡リブ２３に当接すると、その反対側の側面は、スライド係合部３３が開口するリテーナ受容部３０の一内側面と略面一になる。そして、図５に示すように、後述のリテーナ５０がリテーナ受容部３０に受容されることによって座板９２がスライド係合部３３に抜け止めされる。第２のキャスター９５の座板９６に関しても同様である。 As shown in FIG. 4, the seat plate 92 of the first caster 91 is slide-inserted into the slide engaging portion 33 from the second connecting rib 22 side. When one side surface of the seat plate 92 comes into contact with the third connecting rib 23, the side surface on the opposite side becomes substantially flush with the inner side surface of the retainer receiving portion 30 in which the slide engaging portion 33 opens. Then, as shown in FIG. 5, the retainer 50 described later is received by the retainer receiving portion 30, so that the seat plate 92 is prevented from coming off by the slide engaging portion 33. The same applies to the seat plate 96 of the second caster 95.

図４に示すように、１対の横リブ１４Ｂ，１４Ｂのうち第１と第２の連絡リブ２１，２２に挟まれたリテーナ受容部３０の１対の対向壁２５，２５は、１対の横リブ１４Ｂ，１４Ｂの全体に対して互いに離れる側に段付き状にずれている。また、それらの段差面は、第１及び第２の連絡リブ２１，２２の互いの対向面と面一になっている。 As shown in FIG. 4, of the pair of lateral ribs 14B and 14B, the pair of facing walls 25 and 25 of the retainer receiving portion 30 sandwiched between the first and second connecting ribs 21 and 22 are a pair. The lateral ribs 14B and 14B are stepped away from each other with respect to the whole. Further, those stepped surfaces are flush with the facing surfaces of the first and second connecting ribs 21 and 22.

両対向壁２５，２５のうち台盤１１の縦方向Ｈ１の中央側に位置する一方の対向壁２５には第１係合孔３１が形成され、他方の対向壁２５には、第２係合孔３２が形成されている。第１及び第２の係合孔３１，３２は共に四角形をなし、第１係合孔３１は一方の対向壁２５の下端寄り位置に配置され、第２係合孔３２は、他方の対向壁２５の上端寄り位置に配置されている。また、図８に示すように、第２係合孔３２を有する対向壁２５には、内側面と下面との角部をＣ面取りしてガイド面２５Ｓが形成されている。 A first engaging hole 31 is formed in one of the facing walls 25 and 25 located on the center side of the base plate 11 in the vertical direction H1, and a second engaging hole 31 is formed in the other facing wall 25. The hole 32 is formed. The first and second engaging holes 31 and 32 both form a quadrangle, the first engaging hole 31 is arranged near the lower end of one facing wall 25, and the second engaging hole 32 is the other facing wall. It is arranged near the upper end of 25. Further, as shown in FIG. 8, a guide surface 25S is formed on the facing wall 25 having the second engaging hole 32 by chamfering the corners of the inner side surface and the lower surface by C chamfering.

図６に示すように、リテーナ５０は、上下方向に平行に延びかつ縦方向Ｈ１に並ぶ第１と第２の角筒部５１，５２を有する。そして、第１と第２の角筒部５１，５２の下端部同士の間が連絡部５６で連絡されてリテーナ５０の本体部５０Ｈが構成されている。 As shown in FIG. 6, the retainer 50 has first and second square cylinder portions 51 and 52 extending in parallel in the vertical direction and aligned in the vertical direction H1. Then, the lower ends of the first and second square tube portions 51 and 52 are communicated with each other by the connecting portion 56 to form the main body portion 50H of the retainer 50.

第１の角筒部５１は、縦方向Ｈ１では例えば第２の角筒部５２の略２倍の大きさをなし、横方向Ｈ２及び上下方向では、第１と第２の角筒部５１，５２は同じ大きさをなしている。 The first square tube portion 51 has approximately twice the size of, for example, the second square tube portion 52 in the vertical direction H1, and the first and second square tube portions 51 in the horizontal direction H2 and the vertical direction. 52 have the same size.

また、第１及び第２の角筒部５１，５２は、上端は図６に示すように開放し、下端は図７に示すようにリテーナ５０の縦方向Ｈ１全体に亘って延びる底壁７０によって閉塞されている。さらに、図８に示すように、第１の角筒部５１内の下部には、底壁７０から直立する補強リブ５９が備えられている。なお、第２の角筒部５２のうち縦方向Ｈ１で対向する内側面同士の間隔Ｌ１と、縦方向Ｈ１で補強リブ５９とそれに対向する壁部との間隔Ｌ２とは略同一になっている。また、リテーナ５０がリテーナ受容部３０に収まったときには、補強リブ５９はスライド係合部３３内の座板９２，９６の前方に位置する（図１０参照）。 Further, the upper ends of the first and second square cylinder portions 51 and 52 are opened as shown in FIG. 6, and the lower ends are formed by a bottom wall 70 extending over the entire vertical direction H1 of the retainer 50 as shown in FIG. It is blocked. Further, as shown in FIG. 8, a reinforcing rib 59 that stands upright from the bottom wall 70 is provided in the lower portion of the first square tube portion 51. In the second square tube portion 52, the distance L1 between the inner side surfaces facing each other in the vertical direction H1 and the distance L2 between the reinforcing rib 59 and the wall portion facing the reinforcing rib 59 in the vertical direction H1 are substantially the same. .. Further, when the retainer 50 is accommodated in the retainer receiving portion 30, the reinforcing rib 59 is located in front of the seat plates 92 and 96 in the slide engaging portion 33 (see FIG. 10).

図７に示すように、連絡部５６は、第１と第２の角筒部５１，５２の下端部の間に差し渡された底壁７０の一部である下梁５４Ａと、第１と第２の角筒部５１，５２の中間部の間に差し渡され、下梁５４Ａと平行になった上梁５４Ｂと、それら上梁５４Ｂと下梁５４Ａの幅方向の中央部分を連絡するリブ５５と、上梁５４Ｂの両側縁部から起立し、第１と第２の角筒部５１，５２の間を連絡する１対のリブ５３，５３とからなる。 As shown in FIG. 7, the connecting portion 56 includes a lower beam 54A which is a part of the bottom wall 70 passed between the lower ends of the first and second square cylinder portions 51 and 52, and the first beam. A rib that is passed between the intermediate portions of the second square cylinder portions 51 and 52 and connects the upper beam 54B parallel to the lower beam 54A and the central portion of the upper beam 54B and the lower beam 54A in the width direction. It consists of 55 and a pair of ribs 53, 53 that stand up from both side edges of the upper beam 54B and connect between the first and second square cylinder portions 51, 52.

図７に示すように、第１の角筒部５１のうち第２の角筒部５２の反対側の側面５１Ａには、上下方向の中間部に段差面５１Ｄが形成されている。そして、側面５１Ａのうち段差面５１Ｄより下側の下側面５１Ｃが上側の上側面５１Ｂより第２の角筒部５２側にずれている。また、下側面５１Ｃと第１の角筒部５１の下面とが交差する角部は、Ｃ面取りされて干渉回避斜面５８になっている。 As shown in FIG. 7, a stepped surface 51D is formed in the middle portion in the vertical direction on the side surface 51A on the opposite side of the second square cylinder portion 52 of the first square cylinder portion 51. The lower side surface 51C below the stepped surface 51D of the side surface 51A is displaced from the upper upper side surface 51B toward the second square tube portion 52. Further, the corner portion where the lower side surface 51C and the lower surface of the first square cylinder portion 51 intersect is chamfered to form an interference avoidance slope 58.

第１の角筒部５１には、前述のリテーナ受容部３０の第１係合孔３１に係合する第１係合突部６０が備えられている。第１係合突部６０は、前述の上側面５１Ｂの下縁部から水平に突出して下方に直角に曲げされたＬ形リブ６０Ａと、下側面５１Ｃの下端寄り位置から水平に延び、Ｌ形リブ６０Ａに接続された水平リブ６０Ｂと、Ｌ形リブ６０Ａ及び水平リブ６０Ｂの幅方向の中央の間を連絡するリブ６０Ｃとからなる。また、Ｌ形リブ６０Ａの下端は、水平リブ６０Ｂより下方に突出して第１返し突部６０Ｔになっている。さらに、Ｌ形リブ６０Ａ及び水平リブ６０Ｂは、側面５１Ａより幅狭になっている。 The first square tube portion 51 is provided with a first engaging protrusion 60 that engages with the first engaging hole 31 of the retainer receiving portion 30 described above. The first engaging protrusion 60 is an L-shaped rib 60A that protrudes horizontally from the lower edge portion of the upper side surface 51B and is bent downward at a right angle, and extends horizontally from a position near the lower end of the lower side surface 51C and is L-shaped. It consists of a horizontal rib 60B connected to the rib 60A and a rib 60C connecting between the L-shaped rib 60A and the center of the horizontal rib 60B in the width direction. Further, the lower end of the L-shaped rib 60A protrudes downward from the horizontal rib 60B to form a first return protrusion 60T. Further, the L-shaped rib 60A and the horizontal rib 60B are narrower than the side surface 51A.

図６に示すように、第２の角筒部５２には、弾性係合片６１が備えられ、この弾性係合片６１と前述の第２係合孔３２とが、リテーナ５０及びリテーナ受容部３０のそれぞれの回動係合部として互いに係合するようになっている。具体的には、底壁７０は、第２の角筒部５２から第１の角筒部５１の反対側に延長され、その先端から上方に弾性係合片６１が直角曲げされている。その弾性係合片６１の上端は、第２の角筒部５２の上端より僅かに下方に位置している。また、弾性係合片６１の上端部には、第２の角筒部５２と反対側を向いた面に第２係合突部６２が備えられている。第２係合突部６２は、弾性係合片６１の上端から下方に向かうに従って弾性係合片６１からの突出量が徐々に大きくなる楔形状をなしている。また、第２係合突部６２は、弾性係合片６１の本体部分より幅狭になっている。 As shown in FIG. 6, the second square tube portion 52 is provided with an elastic engaging piece 61, and the elastic engaging piece 61 and the above-mentioned second engaging hole 32 form a retainer 50 and a retainer receiving portion. Each of the 30 rotation engaging portions is adapted to engage with each other. Specifically, the bottom wall 70 is extended from the second square tube portion 52 to the opposite side of the first square tube portion 51, and the elastic engaging piece 61 is bent at a right angle upward from the tip thereof. The upper end of the elastic engaging piece 61 is located slightly below the upper end of the second square tube portion 52. Further, the upper end portion of the elastic engaging piece 61 is provided with a second engaging protrusion 62 on a surface facing the side opposite to the second square cylinder portion 52. The second engaging protrusion 62 has a wedge shape in which the amount of protrusion from the elastic engaging piece 61 gradually increases from the upper end of the elastic engaging piece 61 downward. Further, the width of the second engaging protrusion 62 is narrower than that of the main body portion of the elastic engaging piece 61.

弾性係合片６１と第２の角筒部５２との対向面の下端部の間は、１対のリブ６４，６４で連絡されている。それら１対のリブ６４，６４は、弾性係合片６１及び第２の角筒部５２のそれぞれ側縁部の間を連絡し、底壁７０にも連絡されている。また、第２の角筒部５２の対向面のうちリブ６４より上側部分の両側縁部には、１対の突条６３，６３が１対のリブ６４，６４から延長されている。 A pair of ribs 64, 64 is connected between the elastic engaging piece 61 and the lower end portion of the facing surface of the second square cylinder portion 52. The pair of ribs 64, 64 communicates between the side edges of the elastic engagement piece 61 and the second square tube 52, and also connects to the bottom wall 70. Further, a pair of ridges 63, 63 is extended from a pair of ribs 64, 64 on both side edges of a portion of the facing surface of the second square tube portion 52 above the rib 64.

本実施形態の台車１０の構成に関する説明は以上である。次ぎに、この台車１０の作用効果について説明する。本実施形態の台車１０に、第１及び第２のキャスター９１，９５は以下のようにして取り付けられる。 This concludes the description of the configuration of the carriage 10 of the present embodiment. Next, the action and effect of the carriage 10 will be described. The first and second casters 91 and 95 are attached to the carriage 10 of the present embodiment as follows.

第１及び第２のキャスター９１，９５を取り付けるために、例えば、台盤１１は裏返しにされる。そして、第１及び第２のキャスター９１，９５の座板９２，９６が、例えば、第１連絡リブ２１及びその横の縦リブ１４Ａに載置された状態にされてスライド係合部３３内へとスライド挿入される。すると、前述したように、座板９２，９６の一側面が第３連絡リブ２３に当接し、その反対側の側面が、リテーナ受容部３０の内側面と略面一の状態になる（図４参照）。また、座板９２，９６の上面には、リブ２６群、直交リブ２７及び第２連絡リブ２２が当接する。 For example, the pedestal 11 is turned inside out to mount the first and second casters 91, 95. Then, the seat plates 92, 96 of the first and second casters 91, 95 are placed on the first connecting rib 21 and the vertical rib 14A next to the first connecting rib 21, for example, and are placed in the slide engaging portion 33. And slide is inserted. Then, as described above, one side surface of the seat plates 92 and 96 abuts on the third connecting rib 23, and the opposite side surface thereof is substantially flush with the inner surface surface of the retainer receiving portion 30 (FIG. 4). reference). Further, the ribs 26 group, the orthogonal ribs 27 and the second connecting ribs 22 abut on the upper surfaces of the seat plates 92 and 96.

次いで、リテーナ５０がリテーナ受容部３０内に組み付けられる。そのために、図８に示すように、リテーナ５０は、上下方向に対して例えば略４５度傾斜した姿勢にされて第１の角筒部５１側がリテーナ受容部３０に受容され、第１係合孔３１に第１係合突部６０が対向配置される。そして、図９に示すようにリテーナ５０が傾斜姿勢を保って水平に平行されて第１係合突部６０が第１返し突部６０Ｔ側から第１係合孔３１に挿入され、リテーナ５０の干渉回避斜面５８が第１係合孔３１の開口縁に押し付けられる。 The retainer 50 is then assembled within the retainer receiving section 30. Therefore, as shown in FIG. 8, the retainer 50 is tilted at an angle of, for example, approximately 45 degrees with respect to the vertical direction, and the first square tube portion 51 side is received by the retainer receiving portion 30, and the first engagement hole is formed. The first engaging protrusion 60 is arranged to face the 31. Then, as shown in FIG. 9, the retainer 50 is horizontally paralleled while maintaining the inclined posture, and the first engaging protrusion 60 is inserted into the first engaging hole 31 from the first return protrusion 60T side, and the retainer 50 is inserted. The interference avoidance slope 58 is pressed against the opening edge of the first engagement hole 31.

この状態で、第１係合突部６０を回動支点にしてリテーナ５０が回動操作され、第２の角筒部５２がリテーナ受容部３０に挿入されていく。すると、図９に示すように、リテーナ受容部３０の開口縁のガイド面２５Ｓに対し、リテーナ５０の弾性係合片６１の先端か、又は、弾性係合片６１の第２係合突部６２の斜面６２Ｓに当接する。 In this state, the retainer 50 is rotated around the first engaging protrusion 60 as a rotation fulcrum, and the second square tube portion 52 is inserted into the retainer receiving portion 30. Then, as shown in FIG. 9, the tip of the elastic engagement piece 61 of the retainer 50 or the second engagement protrusion 62 of the elastic engagement piece 61 with respect to the guide surface 25S of the opening edge of the retainer receiving portion 30. Abuts on the slope 62S of.

そこからリテーナ５０が、リテーナ受容部３０に向けてさらに回動操作され、弾性係合片６１の弾性変形を経て、リテーナ５０がリテーナ受容部３０の奥部まで挿入される。すると、図１０に示すように、弾性係合片６１の第２係合突部６２がリテーナ受容部３０の第２係合孔３２に係合し、リテーナ５０がリテーナ受容部３０に抜け止めされる。そして、座板９２，９６（図１０には、座板９２のみが示されている）がリテーナ５０によってスライド係合部３３から抜け出す方向への移動を規制され、座板９２，９６がキャスター支持部２０に保持される。以上のようにして第１及び第２のキャスター９１，９５が台盤１１に取り付けられる。 From there, the retainer 50 is further rotated toward the retainer receiving portion 30, and the retainer 50 is inserted to the inner part of the retainer receiving portion 30 through elastic deformation of the elastic engaging piece 61. Then, as shown in FIG. 10, the second engaging protrusion 62 of the elastic engaging piece 61 engages with the second engaging hole 32 of the retainer receiving portion 30, and the retainer 50 is prevented from coming off by the retainer receiving portion 30. To. Then, the seat plates 92, 96 (only the seat plate 92 is shown in FIG. 10) are restricted from moving in the direction of coming out of the slide engaging portion 33 by the retainer 50, and the seat plates 92, 96 support the casters. It is held by the unit 20. As described above, the first and second casters 91 and 95 are attached to the base 11.

なお、リテーナ受容部３０の外側から第２係合突部６２を押圧すれば、第２係合孔３２との係合を容易に解除することができる。そして、上記操作と逆の操作を行ってリテーナ５０をリテーナ受容部３０から取り出せば、第１及び第２のキャスター９１，９５を交換することができる。その際、リテーナ５０の下梁５４Ａを摘まむことで、リテーナ受容部３０からのリテーナ５０の取り出し操作を容易に行うことができる。 If the second engaging protrusion 62 is pressed from the outside of the retainer receiving portion 30, the engagement with the second engaging hole 32 can be easily released. Then, if the retainer 50 is taken out from the retainer receiving unit 30 by performing the reverse operation to the above operation, the first and second casters 91 and 95 can be replaced. At that time, by pinching the lower beam 54A of the retainer 50, the retainer 50 can be easily taken out from the retainer receiving portion 30.

さて、台車１０が使用中に受ける荷重、衝撃、振動等により、例えば、台盤１１やリテーナ５０が変形することがある。しかしながら、本実施形態の台車１０では、第１係合突部６０の先端部から第１返し突部６０Ｔが突出して、台盤１１の第１係合孔３１の開口縁である第１被係止部３１Ａに対向しているので、第１係合突部６０と第１係合孔３１との係合が外れ難い。即ち、本実施形態の台車１０は、従来に比べて組付強度が高く、安定した使用が可能になる。 By the way, for example, the pedestal 11 and the retainer 50 may be deformed by the load, impact, vibration, etc. that the trolley 10 receives during use. However, in the trolley 10 of the present embodiment, the first return protrusion 60T protrudes from the tip of the first engagement protrusion 60, and the first engagement is the opening edge of the first engagement hole 31 of the pedestal 11. Since it faces the stop portion 31A, the engagement between the first engagement protrusion 60 and the first engagement hole 31 is difficult to disengage. That is, the dolly 10 of the present embodiment has higher assembly strength than the conventional one, and can be used stably.

また、リテーナ５０の回動軸方向とスライド挿入方向とが略平行で、座板９２，９６からリテーナ５０が受ける負荷は、リテーナ５０を回動させる力として作用し難い。さらには、リテーナ５０の本体部５０Ｈが、上下方向に平行に延びる第１と第２の角筒部５１，５２の下端部同士の間を連絡部５６で連絡してなり、負荷を第１と第２の角筒部５１，５２で分散して受け止めることができる。これらによっても、台車１０の組付強度が高くなり、安定した使用が可能になる。 Further, the rotation axis direction of the retainer 50 and the slide insertion direction are substantially parallel, and the load received by the retainer 50 from the seat plates 92 and 96 is unlikely to act as a force for rotating the retainer 50. Further, the main body portion 50H of the retainer 50 communicates between the lower ends of the first and second square cylinder portions 51 and 52 extending in parallel in the vertical direction by the connecting portion 56, and the load is set to the first. It can be dispersed and received by the second square cylinder portions 51 and 52. These also increase the assembly strength of the dolly 10 and enable stable use.

また、上述の如く第１係合突部６０に第１返し突部６０Ｔを備えたことで、リテーナ５０の組み付け時に回動操作を行う際には、その回動中心となる第１係合突部６０の位置が安定し、組み付け作業が容易になる。さらに、リテーナ５０のうち第１係合突部６０より下側に干渉回避斜面５８が形成されているので、リテーナ受容部３０に対するリテーナ５０の回動範囲が広くなってリテーナ５０の操作が容易になる。 Further, as described above, since the first engaging protrusion 60 is provided with the first return protrusion 60T, the first engaging protrusion that becomes the center of rotation when the rotation operation is performed when the retainer 50 is assembled. The position of the portion 60 is stable, and the assembly work becomes easy. Further, since the interference avoidance slope 58 is formed below the first engaging protrusion 60 of the retainer 50, the rotation range of the retainer 50 with respect to the retainer receiving portion 30 is widened, and the retainer 50 can be easily operated. Become.

なお、前記実施形態において、第１返し突部６０Ｔと第１被係止部３１Ａとは、リテーナ５０がリテーナ受容部３０の奥部まで受容された状態で、クリアランスの範囲で当接し得ても、し得なくてもよい。第１返し突部６０Ｔと第１被係止部３１Ａとが当接し得る構成であれば、弾性係合片６１が受ける負荷が軽減される。 In the above embodiment, the first return protrusion 60T and the first locked portion 31A may come into contact with each other within the clearance range in a state where the retainer 50 is received to the inner part of the retainer receiving portion 30. , It doesn't have to be. If the structure is such that the first return protrusion 60T and the first locked portion 31A can come into contact with each other, the load received by the elastic engaging piece 61 is reduced.

［第２実施形態］
本実施形態は、図１１に示されており、リテーナ５０Ｖの第２係合突部６２に第２返し突部８０を備えた点のみが第１実施形態と異なる。具体的には、第２返し突部８０は、第２係合突部６２の下面の先端縁から段付き状に突出している。そして、リテーナ５０Ｖがリテーナ受容部３０の奥部まで受容されると、第２返し突部８０と共に第２係合突部６２が第２係合孔３２に入り込んで係合し、自重でリテーナ５０Ｖが降下すると、第２返し突部８０が第２係合孔３２の開口縁である第２被係止部８１と対向する。これにより、本実施形態では、第１及び第２の係合突部６０，６２との両方が、それぞれ第１及び第２の返し突部６０Ｔ，８０によって係合が外れ難くなり、組付強度が高くなる。 [Second Embodiment]
This embodiment is shown in FIG. 11 and differs from the first embodiment only in that the second engaging protrusion 62 of the retainer 50V is provided with the second return protrusion 80. Specifically, the second return protrusion 80 projects stepwise from the tip edge of the lower surface of the second engagement protrusion 62. Then, when the retainer 50V is received to the inner part of the retainer receiving portion 30, the second engaging protrusion 62 enters and engages with the second engaging hole 32 together with the second return protrusion 80, and the retainer 50V is engaged by its own weight. As it descends, the second return protrusion 80 faces the second locked portion 81, which is the opening edge of the second engagement hole 32. As a result, in the present embodiment, both the first and second engaging protrusions 60 and 62 are less likely to be disengaged by the first and second return protrusions 60T and 80, respectively, and the assembly strength is increased. Will be higher.

［他の実施形態］
（１）前記実施形態では、リテーナ５０，５０Ｖを回動操作する際に回動軸の方向とスライド係合部３３への座板９２，９６のスライド挿入方向とが略平行であったが、それらが直交していてもよい。具体的には、例えば、前記第１実施形態の第１連絡リブ２１と第２連絡リブ２２との間を広くすると共に、リテーナ５０をそれに対応させて横方向Ｈ２で大きくし、第２連絡リブ２２側に第１係合孔３１を備える一方、第１連絡リブ２１側に第２係合孔３２を設けて、それら対応させてリテーナ５０に第１係合突部６０と弾性係合片６１とを備えてもよい。 [Other embodiments]
(1) In the above embodiment, when the retainers 50 and 50V are rotated, the direction of the rotation shaft and the slide insertion direction of the seat plates 92 and 96 into the slide engaging portion 33 are substantially parallel. They may be orthogonal. Specifically, for example, the space between the first connecting rib 21 and the second connecting rib 22 of the first embodiment is widened, and the retainer 50 is correspondingly enlarged in the lateral direction H2 to increase the second connecting rib. The first engaging hole 31 is provided on the 22 side, while the second engaging hole 32 is provided on the first connecting rib 21 side, and the retainer 50 is associated with the first engaging protrusion 60 and the elastic engaging piece 61. And may be provided.

（２）前記実施形態では、リテーナ５０に弾性係合片６１が備えられ、リテーナ受容部３０に第２係合孔３２が備えられていたが、それらを逆にしてリテーナ受容部３０に弾性係合片６１を備え、リテーナ５０に第２係合孔３２を備えてもよい。 (2) In the above embodiment, the retainer 50 is provided with the elastic engaging piece 61 and the retainer receiving portion 30 is provided with the second engaging hole 32, but these are reversed and the retainer receiving portion 30 is elastically engaged. The unit 61 may be provided, and the retainer 50 may be provided with a second engagement hole 32.

１０台車
１１台盤
３０リテーナ受容部
３１第１係合孔
３１Ａ第１被係止部
３２第２係合孔
３３スライド係合部
５０，５０Ｖリテーナ
５０Ｈ本体部
５１第１の角筒部
５２第２の角筒部
５６連絡部
５８干渉回避斜面
６０第１係合突部
６０Ｔ，８０返し突部
６１弾性係合片
６２第２係合突部
８１第２被係止部
９１第１キャスター
９２，９６座板
９５第２キャスター 10 trolley 11 pedestal 30 retainer receiving part 31 first engaging hole 31A first locked part 32 second engaging hole 33 slide engaging part 50, 50V retainer 50H main body part 51 first square tube part 52 second Square cylinder part 56 Communication part 58 Interference avoidance slope 60 First engagement protrusion 60T, 80 Return protrusion 61 Elastic engagement piece 62 Second engagement protrusion 81 Second locked part 91 First caster 92,96 Seat plate 95 2nd caster

Claims

台盤の下面に備えたスライド係合部にキャスターの座板がスライド挿入されてから、前記スライド係合部の隣のリテーナ受容部にリテーナが受容されて、前記座板が前記リテーナにより前記スライド係合部に抜け止めされる台車において、
前記リテーナ受容部の内側面に開口する第１係合孔と、
前記リテーナの一側面から突出して前記第１係合孔に係合し、前記リテーナ受容部に対する前記リテーナの回動支点となる第１係合突部と、
前記リテーナと前記リテーナ受容部とに形成されて、少なくとも一方の弾性変形を経て互いに係合し、前記リテーナが前記リテーナ受容部から離脱する方向への回動を規制する回動係合部と、
前記第１係合突部の先端部から下方に突出する第１返し突部と、
前記台盤に形成され、前記第１返し突部と対向して前記第１係合突部を前記第１係合孔に抜け止めする第１被係止部と、を備える台車。 After the seat plate of the caster is slide-inserted into the slide engaging portion provided on the lower surface of the pedestal, the retainer is received by the retainer receiving portion next to the slide engaging portion, and the seat plate is slid by the retainer. In the trolley that is prevented from coming off by the engaging part
A first engaging hole that opens on the inner surface of the retainer receiving portion,
A first engaging protrusion that protrudes from one side surface of the retainer and engages with the first engaging hole and serves as a rotation fulcrum of the retainer with respect to the retainer receiving portion.
A rotation engaging portion formed on the retainer and the retainer receiving portion, engaged with each other through at least one elastic deformation, and restricting rotation of the retainer in a direction away from the retainer receiving portion.
A first return protrusion protruding downward from the tip of the first engagement protrusion,
A dolly including a first locked portion formed on the pedestal, which faces the first return protrusion and prevents the first engagement protrusion from coming off the first engagement hole.

前記回動係合部同士が係合した状態で、前記第１返し突部と前記第１被係止部とが当接し得る請求項１に記載の台車。 The trolley according to claim 1, wherein the first return protrusion and the first locked portion can come into contact with each other in a state where the rotation engaging portions are engaged with each other.

前記第１係合突部は、前記リテーナの前記一側面の上下方向の途中位置に配置され、
前記リテーナの前記一側面のうち前記第１係合突部より下側には、前記第１係合突部から下方に離れるに従って前記リテーナ受容部の内側面から離れるように傾斜する干渉回避斜面が形成されている請求項１又は２に記載の台車。 The first engaging protrusion is arranged at an intermediate position in the vertical direction of the one side surface of the retainer.
On the lower side of the one side surface of the retainer from the first engaging protrusion, there is an interference avoidance slope that inclines so as to move away from the inner side surface of the retainer receiving portion as the distance from the first engaging protrusion decreases downward. The trolley according to claim 1 or 2 which is formed.

前記リテーナの前記回動係合部は、片持ち梁構造をなしかつその先端側に第２係合突部を有する弾性係合片であり、
前記リテーナ受容部の前記回動係合部は、前記第２係合突部が凹凸係合する第２係合孔であり、
前記第２係合突部の先端部から下方に突出する第２返し突部と、
前記台盤に形成され、前記第２返し突部と対向して前記第２係合突部を前記第２係合孔に抜け止めする第２被係止部と、を備える請求項１乃至３の何れか１の請求項に記載の台車。 The rotary engaging portion of the retainer is an elastic engaging piece having a cantilever structure and a second engaging protrusion on the tip end side thereof.
The rotation engaging portion of the retainer receiving portion is a second engaging hole in which the second engaging protrusion is unevenly engaged.
A second return protrusion protruding downward from the tip of the second engagement protrusion, and a second return protrusion.
Claims 1 to 3 include a second locked portion formed on the pedestal and facing the second return protrusion to prevent the second engaging protrusion from coming off the second engaging hole. The dolly according to any one of claims.

前記リテーナの回動軸方向と前記スライド挿入方向とが略平行になっている請求項１乃至４の何れか１の請求項に記載の台車。 The trolley according to claim 1, wherein the rotation axis direction of the retainer and the slide insertion direction are substantially parallel to each other.

前記リテーナは、上下方向に平行に延びる第１と第２の角筒部の下端部同士の間を連絡部で連絡してなる本体部を有し、
前記第１係合突部は、前記第１の角筒部に配置される一方、前記回動係合部は、前記第２の角筒部に配置されている請求項１乃至５の何れか１の請求項に記載の台車。 The retainer has a main body portion formed by connecting the lower ends of the first and second square cylinder portions extending in parallel in the vertical direction with each other by a connecting portion.
The first engaging protrusion is arranged in the first square cylinder portion, while the rotary engaging portion is arranged in any of the second square cylinder portions, according to any one of claims 1 to 5. The dolly described in claim 1.