JP2019199216A

JP2019199216A - Carriage

Info

Publication number: JP2019199216A
Application number: JP2018095803A
Authority: JP
Inventors: 一輝春日; Kazuteru Kasuga
Original assignee: Sanko Co Ltd
Current assignee: Sanko Co Ltd
Priority date: 2018-05-18
Filing date: 2018-05-18
Publication date: 2019-11-21
Anticipated expiration: 2038-05-18
Also published as: JP7055367B2

Abstract

To develop a carriage having assembling strength higher than before.SOLUTION: In a carriage 10, seat plates 92 and 96 of first and second casters 91 and 95 are slidably inserted into a slide engagement part 33 on a lower surface of a table 11 and are retained by a retainer 50 that is received by a retainer receiving part 30. A first engagement protruding part 60 that engages with a first engagement hole 31 on an inner side surface of the retainer receiving part 30 in the retainer 50 is provided with a first return-protruding part 60T that protrudes downward from a tip part. The first return-protruding part 60T opposes to a first part 31A to be locked, an opening edge of the first engagement hole 31, so that the first engagement protruding part 60 is retained by the first engagement hole 31.SELECTED DRAWING: Figure 9

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 slid into the slide engagement portion on the lower surface of the base plate, and the retainer is received by the retainer receiving portion adjacent to the slide engagement portion, so that the seat plate becomes the slide engagement portion. It relates to a truck that is prevented from falling 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 cart of this type, a retainer having an engagement protrusion on one side and an elastic engagement piece on the opposite side is known. The retainer is rotated about the engaging protrusion and pushed into the retainer receiving part in a state where the engaging protrusion is engaged with the entrance of the slide engaging part. And an elastic engagement piece engages with the to-be-engaged part of a retainer receiving part, and a retainer is hold | maintained in a retainer receiving part (for example, refer 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 conventional cart described above, due to deformation of the base plate due to the load of the load, impact during traveling, etc., it is considered that the engagement protrusion is disengaged and the retainer falls off from the retainer receiving portion, In order to cope with this, development of a cart with higher assembly strength is required.

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。 In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that the retainer receiving portion adjacent to the slide engaging portion after the seat plate of the caster is slid into the slide engaging portion provided on the lower surface of the platform. In the carriage in which the retainer is received and the seat plate is retained by the retainer by the slide engagement portion, a first engagement hole opened on an inner surface of the retainer reception portion, and a side surface of the retainer A first engaging protrusion that protrudes and engages with the first engaging hole and serves as a pivot for the retainer relative 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 via elastic deformation and restricts rotation of the retainer in a direction away from the retainer receiving portion, and a first protrusion that protrudes downward from the tip of the first engagement protrusion. 1-turn protrusion , It is formed in the base plate, a first engaged portion that retained the first engagement projection opposite to the first flashing projection in the first engagement hole, a bogie comprising a.

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 carriage 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.

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 a third aspect of the present invention, the first engaging protrusion is disposed at an intermediate position in the vertical direction of the one side surface of the retainer, and is below the first engaging protrusion in the one side surface of the retainer. The carriage according to claim 1, wherein an interference avoidance slope that is inclined so as to be separated from an inner surface of the retainer receiving portion as it is separated downward from the first engagement protrusion.

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。 According to a fourth aspect of the present invention, the rotational engagement portion of the retainer is an elastic engagement piece that has a cantilever structure and has a second engagement protrusion on the tip side thereof, and the retainer receiving portion has the The rotation engagement portion is a second engagement hole with which the second engagement protrusion is engaged with the concave and convex portions, a second return protrusion protruding downward from a tip portion of the second engagement protrusion, A second locked portion formed on the base plate and facing the second return projection to prevent the second engagement projection from coming off in the second engagement hole. It is a trolley | bogie as described in 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。 A fifth aspect of the present invention is the carriage according to any one of the first to fourth aspects, wherein a 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 a sixth aspect of the present invention, the retainer has a main body formed by connecting the lower end portions of the first and second rectangular tube portions extending in parallel in the vertical direction with a connecting portion. 6. The invention according to claim 1, wherein the abutment portion is disposed in the first square tube portion, while the rotational engagement portion is disposed in the second square tube portion. It is a cart as 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 cart of the first aspect, the first return protrusion protrudes downward from the tip end portion of the first engagement protrusion, and the first return protrusion faces the first locked portion of the base. The engagement between the first engagement protrusion and the first engagement hole is difficult to be released, and the assembling strength is higher than the conventional one.

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。 The first return protrusion and the first locked portion may not be able to come into contact with each other within the clearance range in a state where the rotation engaging portions of the retainer and the retainer receiving portion are engaged with each other. It is good also as a structure which can contact | connect (invention of Claim 2). If it is the structure which can contact | abut a 1st return protrusion and a 1st to-be-latched part, the load with respect to the rotation engaging part engaged with each other on those other sides will be 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 cart according to claim 3, since the interference avoidance slope is formed below the first engagement protrusion on one side surface of the retainer, the rotation range of the retainer with respect to the retainer receiving portion is widened, and the retainer is assembled. Is easy to rotate.

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。 According to a fourth aspect of the present invention, the second return protrusion is provided on the second engagement protrusion of the elastic engagement piece provided as the rotation engagement portion of the retainer, and the base is opposed to the second return protrusion. Since the second engaged protrusion is provided so as to prevent the second engagement protrusion from coming off into the second engagement hole, both the first engagement protrusion and the second engagement protrusion are engaged. Is difficult to come off and the assembly strength is increased.

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 to each other as in the configuration of claim 5, the load received by the retainer from the seat plate engaged with the slide engaging portion is the force that rotates the retainer. It becomes difficult to act as. That is, the retaining function of the retainer receiving portion by the retainer 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 cart according to claim 6, the main body portion communicates between the lower end portions of the first and second rectangular tube portions extending in the vertical direction by the connecting portion, and the load is applied to the first and second rectangular tube portions. Can be dispersed and received, and the strength is increased.

本開示の第１実施形態に係る台車の下面側斜視図The lower surface side perspective view of the trolley concerning a 1st embodiment of this indication. 第１と第２のキャスターの斜視図Perspective view of 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 part 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The perspective view of the slide engaging part which the seat board slidably engaged. リテーナを受容したリテーナ受容部の斜視図A perspective view of a retainer receiving portion that receives the retainer リテーナの上面側の斜視図Perspective view of the upper surface side of the retainer リテーナの下面側の斜視図Perspective view of the lower surface side of the retainer リテーナの組み付け時の初期段階の側断面図Side sectional view 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 sectional view of the intermediate stage when the retainer is assembled 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 retainer assembled 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 engagement 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, the cart 10 of this embodiment is shown by FIGS. A base plate 11 of the carriage 10 is, for example, a resin injection-molded product, and has a top plate 12 whose planar shape is rectangular 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, the side wall 13 is suspended from the outer edge of the lower surface of the top plate 12 so as to surround the vertical rib 14A and the horizontal rib 14B. Furthermore, 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 base 11. In the present embodiment, a pair of casters 91 that cannot turn the wheels 90 is attached to a pair of caster support portions 20 on one end side in the longitudinal direction H1 of the base 11, and a pair of caster supports on the other end side. The part 20 is provided with a second caster 95 on which the wheel 90 can turn.

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 and 93 that support the axle 90S are bent at a right angle downward 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 fold line between the seat plate 92 and the leg portion 93 is located inside the outer edge portion of the seat plate 92. Projection 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, as for the 2nd caster 95, the center plate 97B is connected with the lower surface of the rectangular seat board 96 so that rotation is possible. A pair of leg portions 97A and 97A supporting the axle 90S is bent downward at a right angle from the center plate 97B.

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 above-described caster support portions 20 at the four corners of the bottom surface of the base 11 are a pair of lateral ribs 14 B and 14 B that are adjacent to each other at a position near one end and a position near the other end in the longitudinal direction. Are arranged symmetrically in both vertical and horizontal directions H1 and H2 of the base plate 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 horizontal ribs 14B, 14B having the caster support portion 20 therebetween are provided with trapezoidal protrusions 24, 24 protruding downward from positions near both ends in the longitudinal direction. Further, as shown in FIG. 3, the portion having the trapezoidal protrusions 24, 24 of the pair of lateral ribs 14 B, 14 B is communicated between the one end portions by the first connecting rib 21 and closer to the one end portion. The positions are communicated by the second communication rib 22, and the other ends are communicated by the third communication rib 23. A portion surrounded by the first communication rib 21, the second communication rib 22, and the pair of lateral ribs 14B, 14B constitutes a retainer receiving portion 30, and the second communication rib 22, the third communication ribs 23, 1 A portion surrounded by the pair of lateral ribs 14B and 14B constitutes a caster support portion 20. In addition, the retainer receiving part 30 is arrange | positioned from the caster support part 20 in the center side of the horizontal direction H2 in the base board 11. FIG.

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. Moreover, the center part of the width direction of the surface which opposes the 2nd connection rib 22 among the 1st connection ribs 21 is slightly depressed in the step shape. Furthermore, the center part of the width direction of the 2nd connection rib 22 is depressed in the step shape slightly in any of the front and back, and a lower surface. And the lower surface of the 1st connection rib 21 and the lower surface of the both ends of the width direction of the 2nd connection rib 22 are flush | level. Further, the lower surfaces of the plurality of vertical ribs 14 A disposed between the pair of first connecting ribs 21, 21 are also flush with the lower surface of the first connecting rib 21 between the lateral ribs 14 B, 14 B. . Furthermore, between the 2nd connection rib 22 and the 3rd connection rib 23, the several rib 26 protrudes in the side which mutually approaches from the opposing surface of horizontal rib 14B, 14B, and the lower surface of these ribs 26 is also the 1st connection 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 lower surface of the orthogonal rib 27 is entirely flush with both ends of the lower surface of the second connecting rib 22 except for the end on the second connecting rib 22 side. Note that the end portion of the lower surface of the orthogonal rib 27 on the second connecting rib 22 side 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 the.

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 greatly downward as compared with the first and second connecting ribs 21, 22, etc., and the lower surface thereof is flush with the lower surface of the trapezoidal protrusion 24. In addition, from the positions near the lower ends of the opposing surfaces of the trapezoidal protrusions 24, 24, the engagement protrusions 28, 28 protrude on the sides approaching each other. The engaging protrusions 28 and 28 are in the form of a strip extending in the horizontal direction H2 and are provided with a lattice-like reinforcing rib 28B on the lower surface, and a part of the lower surface of the reinforcing rib 28B is flush with the lower surface of the trapezoidal protrusion 24. It has become. One end of the engagement protrusion 28 is connected to the third connecting rib 23, and the lower surface of the reinforcing rib 28 B and the lower surface of the third connecting rib 23 are flush with each other at the connecting portion. Note that the reinforcing rib 28 B is gradually lowered toward the tip of the engaging protrusion 28 at the center in the longitudinal direction of the engaging protrusion 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 projection piece 28 is located slightly below the lower surfaces of the rib 26 group and the second connecting rib 22. A slide engagement portion 33 is formed between the upper surface of the engagement protrusion piece 28 and the lower surfaces of the rib 26 group and the second connection rib 22. Note that the surfaces of the engaging protrusions 28 and the second connecting ribs 22 facing the first connecting rib 21 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 slid into the slide engagement portion 33 from the second connecting rib 22 side. When one side surface of the seat plate 92 abuts on the third communication rib 23, the opposite side surface is substantially flush with one inner side surface of the retainer receiving portion 30 where the slide engaging portion 33 is opened. As shown in FIG. 5, the retainer 50 described later is received in 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, the pair of opposing walls 25 and 25 of the retainer receiving portion 30 sandwiched between the first and second connecting ribs 21 and 22 of the pair of lateral ribs 14B and 14B are formed as a pair. The lateral ribs 14B and 14B are displaced stepwise on the side away from each other. In addition, the step surfaces are flush with the opposing 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 engagement hole 31 is formed in one of the opposing walls 25, 25 located on the center side in the longitudinal direction H 1 of the base 11, and a second engagement is formed in the other opposing wall 25. A hole 32 is formed. The first and second engagement holes 31 and 32 are both rectangular, the first engagement hole 31 is disposed at a position near the lower end of one opposing wall 25, and the second engagement hole 32 is the other opposing wall. 25 is arranged at a position closer to the upper end. Further, as shown in FIG. 8, the opposing wall 25 having the second engagement hole 32 is formed with a guide surface 25 S by chamfering corner portions of the inner surface and the lower surface.

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 includes first and second rectangular tube portions 51 and 52 that extend parallel to the vertical direction and are aligned in the vertical direction H1. And the lower end part of the 1st and 2nd square cylinder parts 51 and 52 is connected by the connection part 56, and the main-body part 50H of the retainer 50 is comprised.

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, for example, approximately twice the size of the second square tube portion 52 in the vertical direction H1, and the first and second square tube portions 51, 51 in the horizontal direction H2 and the vertical direction. 52 has 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 rectangular tube 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 longitudinal direction H1 of the retainer 50 as shown in FIG. It is blocked. Further, as shown in FIG. 8, a reinforcing rib 59 standing upright from the bottom wall 70 is provided at a lower portion in the first rectangular tube portion 51. In addition, the space | interval L1 of the inner side surfaces which oppose in the vertical direction H1 among the 2nd square cylinder parts 52 and the space | interval L2 of the reinforcement rib 59 and the wall part which opposes it 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 positioned 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 54 A that is a part of the bottom wall 70 that is interposed between the lower ends of the first and second rectangular tube portions 51, 52, An upper beam 54B that is interposed between the intermediate portions of the second rectangular tube portions 51 and 52 and is parallel to the lower beam 54A, and a rib that connects the central portions in the width direction of the upper beam 54B and the lower beam 54A 55 and a pair of ribs 53 and 53 that stand from both side edges of the upper beam 54B and communicate between the first and second rectangular tube portions 51 and 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 step surface 51 D is formed at the intermediate portion in the vertical direction on the side surface 51 A on the opposite side of the second rectangular tube portion 52 of the first rectangular tube portion 51. And the lower side surface 51C below the step surface 51D of the side surface 51A is shifted from the upper side surface 51B above the second square tube portion 52 side. Further, the corner portion where the lower side surface 51C and the lower surface of the first square tube 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 engagement protrusion 60 that engages with the first engagement hole 31 of the retainer receiving portion 30 described above. The first engagement protrusion 60 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. It consists of a horizontal rib 60B connected to the rib 60A and a rib 60C communicating 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. Furthermore, 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 rectangular tube portion 52 is provided with an elastic engagement piece 61, and the elastic engagement piece 61 and the above-described second engagement hole 32 include the retainer 50 and the retainer receiving portion. Each of the rotation engaging portions 30 is engaged with each other. Specifically, the bottom wall 70 extends from the second square tube portion 52 to the opposite side of the first square tube portion 51, and the elastic engagement piece 61 is bent at a right angle upward from the tip. The upper end of the elastic engagement piece 61 is located slightly below the upper end of the second rectangular tube portion 52. Further, a second engagement protrusion 62 is provided at the upper end portion of the elastic engagement piece 61 on the surface facing the opposite side of the second square tube portion 52. The second engagement protrusion 62 has a wedge shape in which the protrusion amount from the elastic engagement piece 61 gradually increases as it goes downward from the upper end of the elastic engagement piece 61. The second engagement protrusion 62 is narrower than the main body portion of the elastic engagement 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 are connected between the lower end portions of the opposing surfaces of the elastic engagement piece 61 and the second square tube portion 52. The pair of ribs 64, 64 communicate between the side edge portions of the elastic engagement piece 61 and the second square tube portion 52, and also communicate with the bottom wall 70. A pair of protrusions 63, 63 are extended from the pair of ribs 64, 64 at both side edge portions of the opposing 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 is the end of the description of the configuration of the carriage 10 of this embodiment. Next, the function and effect of the carriage 10 will be described. The first and second casters 91 and 95 are attached to the cart 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。 In order to attach the first and second casters 91 and 95, for example, the base 11 is turned upside down. Then, the seat plates 92 and 96 of the first and second casters 91 and 95 are placed on the first communication rib 21 and the vertical rib 14A on the side thereof, for example, into the slide engagement portion 33. And slide inserted. Then, as described above, one side surface of the seat plates 92 and 96 comes into contact with the third connecting rib 23, and the opposite side surface is substantially flush with the inner side 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 are in contact with 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。 Next, the retainer 50 is assembled into the retainer receiving portion 30. Therefore, as shown in FIG. 8, the retainer 50 is in a posture inclined, 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 The first engagement protrusion 60 is disposed opposite to 31. Then, as shown in FIG. 9, the retainer 50 is kept parallel to the inclined posture and the first engagement protrusion 60 is inserted into the first engagement hole 31 from the first return protrusion 60 T side. 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 using the first engagement 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 distal end 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 25 S of the opening edge of the retainer receiving portion 30. It contacts the slope 62S.

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 back of the retainer receiving portion 30 through elastic deformation of the elastic engagement piece 61. Then, as shown in FIG. 10, the second engagement protrusion 62 of the elastic engagement piece 61 engages with the second engagement hole 32 of the retainer receiving portion 30, and the retainer 50 is prevented from coming off by the retainer receiving portion 30. The Then, the movement of the seat plates 92 and 96 (only the seat plate 92 is shown in FIG. 10) in the direction of coming out of the slide engaging portion 33 is restricted by the retainer 50, and the seat plates 92 and 96 are supported by the casters. Held in the unit 20. The first and second casters 91 and 95 are attached to the base 11 as described above.

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。 In addition, if the 2nd engagement protrusion 62 is pressed from the outer side of the retainer receiving part 30, engagement with the 2nd engagement hole 32 can be cancelled | released easily. Then, if the retainer 50 is taken out from the retainer receiving portion 30 by performing an operation opposite to the above operation, the first and second casters 91 and 95 can be exchanged. At that time, by picking the lower beam 54A of the retainer 50, the operation of taking out the retainer 50 from the retainer receiving portion 30 can be easily performed.

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。 Now, for example, the base plate 11 and the retainer 50 may be deformed by the load, impact, vibration, etc. that the cart 10 receives during use. However, in the cart 10 according to the present embodiment, the first return protrusion 60 T protrudes from the distal end portion of the first engagement protrusion 60, and is the first engaged member that is the opening edge of the first engagement hole 31 of the base 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 cart 10 according to 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. Furthermore, the main body portion 50H of the retainer 50 communicates between the lower end portions of the first and second rectangular tube portions 51, 52 extending in parallel in the vertical direction by the connecting portion 56, and loads are first and second. The second rectangular tube portions 51 and 52 can be received in a distributed manner. Also by these, the assembly | attachment intensity | strength of the trolley | bogie 10 becomes high and the stable use is attained.

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, since the first engagement protrusion 60 includes the first return protrusion 60T as described above, when the rotation operation is performed when the retainer 50 is assembled, the first engagement protrusion is the center of rotation. The position of the part 60 is stabilized, and the assembling work is facilitated. Furthermore, since the interference avoidance slope 58 is formed below the first engagement protrusion 60 in the retainer 50, the rotation range of the retainer 50 relative 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-described embodiment, the first return protrusion 60T and the first locked portion 31A may be in contact with each other within the clearance range in a state where the retainer 50 is received up to the back of the retainer receiving portion 30. It may not be possible. If the first return protrusion 60T and the first locked portion 31A can contact each other, the load received by the elastic engagement 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 a second return protrusion 80 is provided on the second engagement protrusion 62 of the retainer 50V. Specifically, the second return protrusion 80 protrudes from the front end edge of the lower surface of the second engagement protrusion 62 in a stepped shape. When the retainer 50V is received as far as the inner part of the retainer receiving portion 30, the second engagement protrusion 62 enters the second engagement hole 32 and engages with the second return protrusion 80, and the retainer 50V with its own weight. Is lowered, the second return protrusion 80 faces the second locked portion 81 which is the opening edge of the second engagement hole 32. Thereby, in this embodiment, both the 1st and 2nd engagement protrusions 60 and 62 become difficult to disengage by the 1st and 2nd return protrusions 60T and 80, respectively. Becomes 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-described 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 to the slide engagement 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, and the second connecting rib. While the first engagement hole 31 is provided on the 22 side, the second engagement hole 32 is provided on the first communication rib 21 side, and the first engagement protrusion 60 and the elastic engagement piece 61 are provided on the retainer 50 in correspondence therewith. 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-described embodiment, the retainer 50 is provided with the elastic engagement piece 61 and the retainer receiving portion 30 is provided with the second engagement hole 32. The joining piece 61 may be provided, and the retainer 50 may be provided with the 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 DESCRIPTION OF SYMBOLS 10 Carriage 11 Base 30 Retainer receiving part 31 1st engagement hole 31A 1st to-be-latched part 32 2nd engagement hole 33 Slide engagement part 50,50V retainer 50H main-body part 51 1st square cylinder part 52 2nd Square tube portion 56 Connecting portion 58 Interference avoiding slope 60 First engagement protrusion 60T, 80 Return protrusion 61 Elastic engagement piece 62 Second engagement protrusion 81 Second locked portion 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 slid into the slide engaging portion provided on the lower surface of the base, the retainer is received by the retainer receiving portion adjacent to the slide engaging portion, and the seat plate is slid by the retainer. In the dolly that is retained by the engaging part,
A first engagement hole opening in the inner surface of the retainer receiving portion;
A first engagement protrusion that protrudes from one side surface of the retainer and engages with the first engagement hole, and serves as a pivot for the retainer relative to the retainer receiving portion;
A rotation engaging portion that is formed on the retainer and the retainer receiving portion, engages with each other via at least one elastic deformation, and restricts rotation in a direction in which the retainer separates from the retainer receiving portion;
A first return protrusion projecting downward from the tip of the first engagement protrusion;
A cart provided with a first locked portion formed on the base plate and facing the first return projection to prevent the first engagement projection from coming off in 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 | bogie of Claim 1 which can contact | abut the said 1st return protrusion and a said 1st to-be-latched part in the state which the said rotation engaging parts engaged.

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 engagement protrusion is disposed at an intermediate position in the vertical direction of the one side surface of the retainer,
An interference avoidance slope that slopes away from the inner side surface of the retainer receiving portion as it moves downward from the first engagement projection portion below the first engagement projection portion of the one side surface of the retainer. The trolley | bogie of Claim 1 or 2 currently 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 rotational engagement portion of the retainer is an elastic engagement piece having a cantilever structure and having a second engagement protrusion on the tip side thereof,
The rotation engagement portion of the retainer receiving portion is a second engagement hole in which the second engagement protrusion is engaged with an uneven shape,
A second return protrusion protruding downward from the tip of the second engagement protrusion;
A second locked portion that is formed on the base plate and faces the second return projection and prevents the second engagement projection from coming off in the second engagement hole. The trolley | bogie as described in 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 cart according to any one of claims 1 to 4, wherein a 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 formed by connecting the lower end portions of the first and second rectangular tube portions extending in parallel in the vertical direction with a connecting portion,
The said 1st engagement protrusion is arrange | positioned in the said 1st square cylinder part, On the other hand, the said rotation engagement part is arrange | positioned in the said 2nd square cylinder part. The cart according to claim 1.