JP2024021093A

JP2024021093A - caster

Info

Publication number: JP2024021093A
Application number: JP2022123654A
Authority: JP
Inventors: 政広川瀬; Masahiro Kawase
Original assignee: GOLD KIYASUTAA KK
Current assignee: GOLD KIYASUTAA KK
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2024-02-16

Abstract

PROBLEM TO BE SOLVED: To provide a caster which comprises a brake member and has a simple structure.

SOLUTION: A caster comprises: a body member which pivotally supports a wheel 6 turnably; a brake member 21 which is pivotally supported by the body member turnably, and capable of pressing an outer peripheral surface 6G of the wheel 6 with a brake part 23S being rotated in a brake direction approaching the wheel 6; double torsion bar springs 27 which urges the brake member 21 in a brake release direction in which the brake part 23S separates from the outer peripheral surface 6G of the wheel 6; cylindrical parts 26 which are provided in the brake member 21; and a brake operation member 31 which is pivotally supported by the body member turnably. When a tip end side of the brake operation member 31 is rotated downward, the brake operation member 31 pushes the cylindrical parts 26 to cause the brake member 21 to rotate in a brake direction, so that the rotation in the brake direction causes the brake part 23S to press the outer peripheral surface 6G of the wheel 6.

SELECTED DRAWING: Figure 6

Description

本発明は、キャスターに関する。 The present invention relates to casters.

従来、この種のものとして、ブレーキ部は、ブレーキフレームに外装した操作レバーと、ブレーキフレームに内装したブレーキシューからなり、前記ブレーキシューの軸孔の周囲に設けた輪状突部は、ブレーキフレームの下転動孔に入り込むようにしており、操作レバーの操作部を足先などで押し下げ、操作レバーを下げた状態にすると、操作レバーを軸支するリベット頭部がブレーキフレームの上転動孔を転動して、この上転動孔の下方に移動すると共に、ブレーキシューを軸支するリベットがブレーキフレームの下転動孔を下降して、この下転動孔の下方に移動し、このリベットの下降にともないブレーキシューも下降し、ブレーキシューのブレーキライニングが、車輪の接地面に接触し、車輪がロック状態となるキャスター（例えば特許文献１）がある。 Conventionally, as for this kind of brake unit, the brake part consists of an operating lever mounted on the outside of the brake frame and a brake shoe mounted inside the brake frame, and a ring-shaped protrusion provided around the shaft hole of the brake shoe is connected to the brake frame. When the operating part of the operating lever is pushed down with the tip of the foot to lower the operating lever, the head of the rivet that pivotally supports the operating lever enters the upper rolling hole of the brake frame. At the same time, the rivet that pivotally supports the brake shoe moves down the lower rolling hole of the brake frame and moves below this lower rolling hole, and this rivet There is a caster (for example, Patent Document 1) in which the brake shoe also lowers as the wheel lowers, and the brake lining of the brake shoe comes into contact with the ground contact surface of the wheel, thereby locking the wheel.

上記特許文献１のキャスターでは、操作レバーの操作部を足先などで押し下げることにより、比較的大きな制動力を得ることができる。 In the caster disclosed in Patent Document 1, a relatively large braking force can be obtained by pressing down the operating portion of the operating lever with the tip of the foot.

一方、上記特許文献１のキャスターは、キャスター部にブレーキ部を取り付けたり、キャスター部からブレーキ部を取り外す場合に、この取り付けたり、取り外す作業を簡便なものとするため、構造が複雑になる面があった。 On the other hand, the caster of Patent Document 1 has a complicated structure because it simplifies the work of attaching and removing the brake section to the caster section and when removing the brake section from the caster section. there were.

また、車輪の制動状態を表示するものとして、ペダルの踏部の前部を前方へ押し倒すと、車輪は回転することができず、制動され、この状態で踏部の上面が後部を向くことになり、斜め上からは制動表示を認識することはでき、一方、ペダルの踏部の後部を下方へ傾倒させると、車輪に対するストッパの制動が解除され、踏部の下に隠れていたハウジングの後上部に制動解除表示が現れ、車輪がフリー状態で走行移動可能なことを認識することができるキャスター（例えば特許文献２）がある。 Also, as an indicator of the braking state of the wheels, if you push the front part of the pedal tread forward, the wheel will not be able to rotate and will be braked, and in this state the top of the tread will be facing the rear. The brake display can be seen from diagonally above, but when the rear part of the pedal tread is tilted downward, the brake of the stopper against the wheel is released, and the rear of the housing hidden under the tread is released. There is a caster (for example, Patent Document 2) in which a brake release display appears on the upper part of the caster, allowing the user to recognize that the wheels are free to run and move.

上記特許文献２のキャスターでは、表示を視認して車輪の制動状態と制動解除状態が判るが、ペダルの前部を前方に押し倒してロックするものであるため、ペダルを足で踏んでロックする場合に比べて、ペダルに大きな力を加えることができず、構造的に大きな制動力が得られ難い面がある。また、踏部の上面や、踏部の下に隠れていたハウジングに制動表示や制動解除表示を設けるため、真上から近付いた位置でないと、制動状態と制動解除状態とを判別し難い面があった。 In the caster disclosed in Patent Document 2, the braking state and the braking release state of the wheel can be determined by visually checking the display, but since the front part of the pedal is pushed forward and locked, when the pedal is locked by stepping on the pedal with the foot. Compared to this, it is not possible to apply a large force to the pedals, and it is structurally difficult to obtain a large braking force. In addition, since the brake display and brake release display are provided on the top surface of the tread and the housing hidden under the tread, it is difficult to distinguish between the brake state and the brake release state unless you approach from directly above. there were.

特開２００４－２４３９４３号公報Japanese Patent Application Publication No. 2004-243943 特開２０００－２９６７０１号公報Japanese Patent Application Publication No. 2000-296701

本発明は、上記の問題点に鑑みてなされたもので、ブレーキ部材を備えたキャスターにおいて、構造簡易なキャスターを提供することを目的とし、加えて、ブレーキ部材の制動状態の識別が容易なキャスターを提供することを目的とする。 The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a caster with a simple structure in a caster equipped with a brake member, and in addition, a caster in which the braking state of the brake member can be easily identified. The purpose is to provide

請求項１の発明は、車輪を回動可能に軸支する本体部材と、前記本体部材に回動可能に軸支されると共に、制動部が前記車輪に近付く制動方向に回転して前記車輪の外周面を押圧可能なブレーキ部材と、前記制動部が前記車輪の前記外周面から離れる制動解除方向に前記ブレーキ部材を付勢する付勢手段と、前記ブレーキ部材に設けられた作動部と、前記本体部材に回動可能に軸支されたブレーキ操作部材とを備え、前記ブレーキ操作部材の先端側を下方向に回転することにより、該ブレーキ操作部材が前記作動部を押して前記ブレーキ部材が前記制動方向に回転し、この制動方向の回転により前記制動部が前記車輪の前記外周面を押圧するように構成したことを特徴とする。 The invention according to claim 1 includes a main body member that rotatably supports a wheel, and a braking unit that is rotatably supported by the main body member and that rotates in a braking direction that approaches the wheel so that the wheel is rotated. a brake member capable of pressing an outer circumferential surface; an urging means for urging the brake member in a brake release direction in which the braking section moves away from the outer circumferential surface of the wheel; an actuating section provided on the brake member; and a brake operating member rotatably supported by a main body member, and by rotating the distal end side of the brake operating member downward, the brake operating member pushes the operating portion and the brake member applies the brake. The wheel is rotated in the braking direction, and the braking portion presses the outer circumferential surface of the wheel by rotation in the braking direction.

請求項２の発明は、前記ブレーキ操作部材は、前記作動部に対応して揺動腕部を有し、前記本体部材に前記揺動腕部の基端側を回動可能に軸支し、前記揺動腕部の先端側を下方向に回転することより、前記揺動腕部が前記作動部を押して前記ブレーキ部材が前記制動方向に回転し、この制動方向の回転により前記制動部が前記車輪の前記外周面を押圧し、前記制動部が前記車輪の前記外周面を押圧した位置で、前記作動部が係止する係止部を、前記揺動腕部に設けたことを特徴とする。 According to a second aspect of the invention, the brake operating member has a swinging arm corresponding to the actuating part, and a proximal end of the swinging arm is rotatably supported on the main body member, By rotating the distal end side of the swinging arm downward, the swinging arm pushes the actuating part and the brake member rotates in the braking direction, and this rotation in the braking direction causes the braking part to rotate in the braking direction. The swinging arm is provided with a locking portion that presses the outer circumferential surface of the wheel and is locked by the operating portion at a position where the braking portion presses the outer circumferential surface of the wheel. .

請求項３の発明は、前記本体部材に設けられ、前記制動部が前記車輪の前記外周面から離れた位置で前記作動部が当接して前記ブレーキ部材の前記制動解除方向の回転を規制する当接受部を備えることを特徴とする。 The invention according to claim 3 provides a mechanism that is provided in the main body member, and that the actuating part comes into contact with the braking part at a position away from the outer circumferential surface of the wheel to restrict rotation of the brake member in the brake release direction. It is characterized by having a receiving part.

請求項４の発明は、前記ブレーキ操作部材の上方位置で前記制動部が前記車輪の前記外周面から離れ、前記ブレーキ操作部材の下方位置で前記制動部が前記車輪の前記外周面を押圧し、前記ブレーキ操作部材の前記上方位置で隠れ、前記ブレーキ操作部材の前記下方位置で該ブレーキ操作部材上に現れる識別表示部を備えることを特徴とする。 The invention according to claim 4 provides that the braking part is separated from the outer circumferential surface of the wheel at a position above the brake operating member, and the braking part presses the outer circumferential surface of the wheel at a position below the brake operating member, It is characterized by comprising an identification display section that is hidden at the upper position of the brake operating member and appears on the brake operating member at the lower position of the brake operating member.

請求項５の発明は、前記識別表示部を備えた識別部材を前記本体部材に揺動可能に設け、前記ブレーキ操作部材の前記下方位置で前記ブレーキ操作部材上に前記識別表示部が現れるように前記識別部材に係合する作動部材を備え、前記作動部材の基端側を前記ブレーキ操作部材に回動可能に軸支し、前記作動部材の先端側に、前記車輪に係合する車輪係合部を設けると共に、前記車輪係合部が前記車輪に係合した状態で、前記識別表示部が前記ブレーキ操作部材上に現れるように前記識別部材に係合する識別部材係合部を設けたことを特徴とする。 The invention according to claim 5 is such that an identification member including the identification display portion is swingably provided on the main body member, and the identification display portion appears on the brake operation member at the lower position of the brake operation member. an actuating member that engages with the identification member, a proximal end of the actuating member being rotatably supported on the brake operating member, and a wheel engaging member that engages with the wheel on the distal end of the actuating member; and an identification member engaging portion that engages with the identification member such that the identification display portion appears on the brake operating member when the wheel engaging portion is engaged with the wheel. It is characterized by

請求項１の構成によれば、ブレーキ操作部材の先端側を下方向に回転すると、ブレーキ操作部材が作動部を押してブレーキ部材が制動方向に回転し、制動部が車輪の外周面を押圧する制動状態とすることができ、ブレーキ部材に設けた作動部とブレーキ操作部材とにより制動状態に切替える構造であるから、構造が比較的簡易で、製造が容易となる。 According to the structure of claim 1, when the distal end side of the brake operating member is rotated downward, the brake operating member pushes the actuating part, the brake member rotates in the braking direction, and the braking part presses the outer peripheral surface of the wheel. Since the structure is such that the braking state can be switched to the braking state by an actuating section provided on the brake member and a brake operating member, the structure is relatively simple and manufacturing is easy.

請求項２の構成によれば、ブレーキ操作部材の先端側を下方向に回転すると、揺動腕部が作動部を押してブレーキ部材が車輪の外周面に押圧することより、車輪を制動状態にすることができる。また、揺動腕部の係止部に作動部が係止することにより、制動位置でブレーキ操作部材が位置固定される。 According to the structure of claim 2, when the distal end side of the brake operating member is rotated downward, the swinging arm pushes the operating part and the brake member presses against the outer peripheral surface of the wheel, thereby putting the wheel in a braking state. be able to. In addition, the actuating portion is locked to the locking portion of the swinging arm, so that the brake operating member is fixed at the braking position.

請求項３の構成によれば、制動部が車輪の外周面から離れた位置で、作動部が本体部材の当接受部に当接してブレーキ部材の制動解除方向の回転が規制される。このように作動部を利用してブレーキ部材の制動解除方向の回転を規制するため、付勢手段により制動解除方向に付勢されているブレーキ部材の制動解除方向への回り止め構造を、別途に設ける必要が無くなる。 According to the third aspect of the present invention, the actuating portion contacts the contact receiving portion of the main body member at a position where the braking portion is away from the outer circumferential surface of the wheel, thereby restricting rotation of the brake member in the brake release direction. In order to restrict the rotation of the brake member in the brake release direction using the actuating part, a separate structure is provided to prevent the brake member, which is biased in the brake release direction by the biasing means, from rotating in the brake release direction. There is no need to provide one.

請求項４の構成によれば、車輪の制動解除状態で隠れていた識別表示部が、制動状態でブレーキ操作部材上に現れるため、制動状態と制動解除状態が判り易いものとなる。 According to the fourth aspect of the present invention, the identification display portion, which is hidden when the wheel is in the brake-released state, appears on the brake operating member when the wheel is in the brake-released state, so that the brake-released state and the brake-released state can be easily recognized.

請求項５の構成によれば、上方位置から下方位置にブレーキ操作部材を回転すると、車輪係合部が車輪に係合し、識別部材係合部が識別部材に係合して識別表示部がブレーキ操作部材上に現れる。 According to the structure of claim 5, when the brake operating member is rotated from the upper position to the lower position, the wheel engaging part engages the wheel, the identification member engaging part engages the identification member, and the identification display part is displayed. Appears on the brake operating member.

本発明に実施例１を示す制動解除状態のキャスターの一部を切り欠いた側面図である。1 is a partially cutaway side view of a caster in a brake-released state showing Embodiment 1 of the present invention; FIG. 同上、制動解除状態の要部の一部切欠き断面図である。It is a partially cutaway sectional view of the main part of the same as above, in a brake released state. 同上、制動状態のキャスターの一部を切り欠いた側面図である。It is a side view with a part cut away of the caster in a braking state same as the above. 同上、キャスターの斜視図である。It is a perspective view of a caster same as the above. 同上、保持部材とブレーキ操作部材の斜視図である。It is a perspective view of a holding member and a brake operation member same as the above. 同上、制動解除状態の要部の一部切欠き断面図である。It is a partially cutaway sectional view of the main part of the same as above, in a brake released state. 本発明の実施例２を示す制動解除状態のキャスターの一部を切り欠いた側面図である。FIG. 7 is a partially cutaway side view of a caster in a brake-released state showing a second embodiment of the present invention. 同上、キャスターの斜視図である。It is a perspective view of a caster same as the above. 同上、ブレーキ操作部材が上方位置の要部に一部切欠き断面図である。FIG. 6 is a partially cutaway sectional view of the main part of the same as above, with the brake operating member in an upper position. 同上、ブレーキ操作部材が下方位置の要部に一部切欠き断面図である。FIG. 6 is a partially cutaway cross-sectional view of the main part of the same as above, with the brake operating member in a lower position.

本発明における好適な実施の形態について添付図面を参照して説明する。尚、以下に説明する実施の形態は、特許請求の範囲に記載された本発明の内容を限定するものではない。また、以下に説明される構成の全てが、本発明の必須条件であるとは限らない。 Preferred embodiments of the present invention will be described with reference to the accompanying drawings. Note that the embodiments described below do not limit the content of the present invention described in the claims. Furthermore, not all of the configurations described below are essential conditions for the present invention.

図１乃至図６は、本発明のキャスターの一実施形態について示している。本実施例において、便宜上、図１～図３及び図６において、右側を前側、左側を後側とする。キャスター１の上部には、円形取付板である上皿部材２が設けられ、この上皿部材２の中央に、中心軸が垂直方向の中空軸３を固定し、その上皿部材２の下側に第１の鋼球４を介して中皿部材５を回動自在に配設し、この中皿部材５の下側に、車輪６を回動自在に軸支する支持部材たるフォーク７の上部７Ａを、固定部７Ｂにより固定している。 1 to 6 show one embodiment of the caster of the present invention. In this embodiment, for convenience, in FIGS. 1 to 3 and 6, the right side is referred to as the front side and the left side is referred to as the rear side. An upper plate member 2, which is a circular mounting plate, is provided on the upper part of the caster 1. A hollow shaft 3 whose center axis is vertical is fixed to the center of the upper plate member 2, and the lower side of the upper plate member 2 is fixed to the center of the upper plate member 2. An inner plate member 5 is rotatably disposed through the first steel ball 4, and an upper portion of a fork 7, which is a support member that rotatably supports the wheel 6, is attached to the lower side of the inner plate member 5. 7A is fixed by a fixing portion 7B.

また、フォーク７の上部７Ａの下面側は、第２の鋼球４Ａを介して前記中空軸３の下部により支持され、上皿部材２と中空軸３に対して、中皿部材５とフォーク７とが回動可能に連結されている。尚、車輪６はその外周が硬質ウレタンゴムなどから形成される。 Further, the lower surface side of the upper part 7A of the fork 7 is supported by the lower part of the hollow shaft 3 via the second steel ball 4A, and the inner plate member 5 and the fork 7 are are rotatably connected. The outer periphery of the wheel 6 is made of hard urethane rubber or the like.

前記フォーク７は、前記上部７Ａの左右に下向きの腕部７Ｃ，７Ｃを有し、これら左右の腕部７Ｃ，７Ｃの間に車輪６を配置すると共に、左右の腕部７Ｃ，７Ｃ間に円筒状の軸部９を設け、この軸部９により車輪６を回動可能に軸支している。また、左右の腕部７Ｃ，７Ｃと軸部９にボルト１０を挿通し、このボルト１０の先端にナット１０Ａ（図４）を螺合してフォーク７に車輪６が取り付けられている。 The fork 7 has downwardly directed arm parts 7C, 7C on the left and right sides of the upper part 7A, and the wheel 6 is arranged between these left and right arm parts 7C, 7C. A shaped shaft portion 9 is provided, and the wheel 6 is rotatably supported by this shaft portion 9. Further, a bolt 10 is inserted through the left and right arm portions 7C, 7C and the shaft portion 9, and a nut 10A (FIG. 4) is screwed onto the tip of the bolt 10 to attach the wheel 6 to the fork 7.

図４などに示すように、前記フォーク７の前記腕部７Ｃ，７Ｃの後部には、保持部材たるブラケット１１が固定されている。そして、このブラケット１１と前記フォーク７とにより本体部材８を構成している。 As shown in FIG. 4 and the like, a bracket 11 serving as a holding member is fixed to the rear portions of the arm portions 7C, 7C of the fork 7. The bracket 11 and the fork 7 constitute a main body member 8.

前記ブラケット１１は、図１などに示すように、前縁１２Ｍ側が後縁側より高くなるように傾斜した上面部１２と、この上面部１２の左右に設けた下向きの左右の側板部１３，１３とを備える。この側板部１３は、先端が前側上部に位置する上腕部１４と、先端が前側下部に位置する下腕部１５と、これら上腕部１４と下腕部１５と間に設けられ、前側が開口した開口溝部１６とを備え、この開口溝部１６は、後側から前側に向かって拡大する。 As shown in FIG. 1, the bracket 11 includes an upper surface portion 12 that is inclined so that the front edge 12M side is higher than the rear edge side, and downwardly facing left and right side plate portions 13, 13 provided on the left and right sides of this upper surface portion 12. Equipped with. This side plate part 13 has an upper arm part 14 whose tip is located at the upper front side, a lower arm part 15 whose tip is located at the lower front side, and is provided between the upper arm part 14 and the lower arm part 15, and has an open front side. The opening groove 16 expands from the rear side toward the front side.

図４に示すように、前記上腕部１４，１４は、これらの先端側（前端側）が前記フォーク７の左右の腕部７Ｃ，７Ｃの上側外面を左右から挟んだ状態で、ボルト１８とナット１８Ａとにより、左右の腕部７Ｃ，７Ｃの上部に固定されている。一方、前記下腕部１５，１５は、これらの先端側（前端側）が前記フォーク７の左右の腕部７Ｃ，７Ｃの下側外面を挟んだ状態で、上述したボルト１０とナット１０Ａにより左右の腕部７Ｃ，７Ｃに固定されている。そして、そのボルト１０は、前記軸部９，左右の腕部７Ｃ，７Ｃ及び左右の下腕部１５，１５に挿通され、挿通したボルト１０の先端にナット１０Ａが螺合されている。 As shown in FIG. 4, the upper arm parts 14, 14 are connected to the bolt 18 and the nut with their tip sides (front end sides) sandwiching the upper outer surfaces of the left and right arm parts 7C, 7C of the fork 7 from left and right. 18A, it is fixed to the upper portions of the left and right arm portions 7C, 7C. On the other hand, the lower arm parts 15, 15 are connected to the left and right by the bolt 10 and nut 10A, with their tip sides (front end sides) sandwiching the lower outer surfaces of the left and right arm parts 7C, 7C of the fork 7. It is fixed to the arm parts 7C, 7C of. The bolt 10 is inserted through the shaft portion 9, the left and right arm portions 7C, 7C, and the left and right lower arm portions 15, 15, and a nut 10A is screwed onto the tip of the inserted bolt 10.

ブレーキ部材２１は、図１に示すように、側面視で略Ｖ字形の左右の側板部２２，２２と、これら左右の側板部２２，２２の上縁を連結するブレーキ板２３とを一体に備え、このブレーキ板２３の後縁側を斜め下向きに折り曲げて制動部２３Ｓが形成されている。 As shown in FIG. 1, the brake member 21 integrally includes left and right side plate portions 22, 22 that are approximately V-shaped in side view, and a brake plate 23 that connects the upper edges of these left and right side plate portions 22, 22. A brake portion 23S is formed by bending the rear edge side of the brake plate 23 diagonally downward.

そして、図３に示すように、左右の側板部２２，２２の前側上部に軸受部２２Ａ，２２Ａを突設し、これら左右の軸受部２２Ａ，２２Ａと前記ブラケット１１の左右の側板部１３，１３に、ブレーキ部材用横軸たるボルト２４が挿通され、このボルト２４の先端にナット２５（図４）を螺合し、これによりブレーキ部材２１の制動部２３Ｓが上下方向に揺動するように、本体部材８のブラケット１１にブレーキ部材２１が上下方向回動可能に軸支されている。 As shown in FIG. 3, bearing portions 22A, 22A are protruded from the upper front sides of the left and right side plate portions 22, 22, and these left and right bearing portions 22A, 22A and the left and right side plate portions 13, 13 of the bracket 11 are provided with bearing portions 22A, 22A. A bolt 24, which is a horizontal shaft for the brake member, is inserted into the bolt 24, and a nut 25 (FIG. 4) is screwed onto the tip of the bolt 24, so that the braking portion 23S of the brake member 21 swings in the vertical direction. A brake member 21 is pivotally supported by a bracket 11 of the main body member 8 so as to be rotatable in the vertical direction.

尚、制動方向Ｓ（図２）は、ブレーキ操作部材３１により前記制動部２３Ｓが前記車輪６の外周面６Ｇに近付く回転方向であり、制動解除方向Ｋ（図３）は、ブレーキ操作部材３１により前記制動部２３Ｓが前記車輪６の外周面６Ｇから離れる回転方向である。 The braking direction S (FIG. 2) is the rotational direction in which the braking portion 23S approaches the outer peripheral surface 6G of the wheel 6 by the brake operating member 31, and the braking release direction K (FIG. This is the rotation direction in which the braking portion 23S moves away from the outer circumferential surface 6G of the wheel 6.

また、前記左右の側板部２２，２２の外面には、作動部たる左右の筒部２６，２６が左右外向きに突設され、この筒部２６は前記ボルト２４の下方で、側板部２２の下部側の該ボルト２４から離れた位置に設けられている。尚、筒部２６は金属製の側板部２２の一部をプレスによる塑性加工により中空筒状に形成したものである。 Further, on the outer surfaces of the left and right side plate parts 22, 22, left and right cylindrical parts 26, 26, which are actuating parts, are provided to protrude left and right outward. It is provided at a position away from the bolt 24 on the lower side. Note that the cylindrical portion 26 is formed by forming a part of the metal side plate portion 22 into a hollow cylindrical shape by plastic working using a press.

前記制動部２３Ｓが前記車輪６の外周面６Ｇから離れる制動解除方向Ｋにブレーキ部材２１を付勢する付勢手段を備え、この付勢手段としてコイル部を有するダブルトーションバネ２７を用いている。 The braking section 23S includes a biasing means for biasing the brake member 21 in a brake release direction K away from the outer circumferential surface 6G of the wheel 6, and a double torsion spring 27 having a coil portion is used as the biasing means.

前記ダブルトーションバネ２７に前記ボルト２４を挿通し、そのダブルトーションバネ２７の中央部２７Ｓを前記上面部１２の前縁１２Ｍに係止し、そのダブルトーションバネ２７の両端部２７Ｔ，２７Ｔをブレーキ板２３の下面に係止しており、ダブルトーションバネ２７により、前記ブレーキ部材２１の制動部２３Ｓが車輪６の外周面６Ｇから離れる制動解除方向Ｋである上方向に該ブレーキ部材２１を付勢している。 The bolt 24 is inserted into the double torsion spring 27, the center part 27S of the double torsion spring 27 is locked to the front edge 12M of the upper surface part 12, and both ends 27T, 27T of the double torsion spring 27 are connected to the brake plate. 23, and the double torsion spring 27 urges the brake member 21 upward, which is the brake release direction K, in which the braking portion 23S of the brake member 21 moves away from the outer peripheral surface 6G of the wheel 6. ing.

図５などに示すように、前記開口溝部１６は、前記上腕部１４の下縁１４Ｆと前記下腕部１５の上縁１５Ｆとの間に設けられたものであり、それら下縁１４Ｆと上縁１５Ｆの間隔は後方に向かって縮小するように形成されている。 As shown in FIG. 5 etc., the opening groove portion 16 is provided between the lower edge 14F of the upper arm portion 14 and the upper edge 15F of the lower arm portion 15. The interval 15F is formed to decrease toward the rear.

また、前記開口溝部１６は、下縁１４Ｆと上縁１５Ｆの後端に、略一定幅の案内溝部１７が設けられ、この案内溝部１７は、上縁部１７Ｕと下縁部１７Ｓ（図５）を有し、その案内溝部１７の後端に、前記筒部２６が当接する当接受部たる当接底部１７Ｔが設けられ、この当接底部１７Ｔは筒部２６の外形に対応して半円形に形成されている。 Further, the opening groove portion 16 is provided with a guide groove portion 17 having a substantially constant width at the rear end of the lower edge 14F and the upper edge 15F. At the rear end of the guide groove portion 17, a contact bottom portion 17T, which is a contact receiving portion with which the cylinder portion 26 comes into contact, is provided. It is formed.

そして、ダブルトーションバネ２７により、筒部２６が後方に移動するように、ブレーキ部材２１が制動解除方向Ｋに付勢されており、筒部２６が当接底部１７Ｔに圧接する（図２）ことにより、制動部２３Ｓが車輪６の外周面６Ｇから離れた位置でブレーキ部材２１が回り止めされ、車輪６が制動解除状態に保持され、その位置がブレーキ部材２１の制動解除位置である。 The brake member 21 is biased in the brake release direction K by the double torsion spring 27 so that the cylindrical portion 26 moves rearward, and the cylindrical portion 26 comes into pressure contact with the contact bottom portion 17T (FIG. 2). As a result, the brake member 21 is stopped from rotating at a position where the brake portion 23S is separated from the outer circumferential surface 6G of the wheel 6, and the wheel 6 is held in the brake release state, and this position is the brake release position of the brake member 21.

尚、図２などに示すように、筒部２６が当接底部１７Ｔに圧接した状態で、筒部２６と当接底部１７Ｔとの間には隙間が見えるが、これは上述したように塑性加工で形成した筒部２６は、外周面が先端側に向かってテーパー状に縮小する形状を有するためであり、筒部２６の外周面の基端側の少なくとも一部は、ダブルトーションバネ２７の付勢により当接底部１７Ｔに圧接する。 As shown in FIG. 2, there is a gap between the cylindrical part 26 and the abutting bottom part 17T when the cylindrical part 26 is in pressure contact with the abutting bottom part 17T, but this is caused by plastic processing as described above. This is because the outer circumferential surface of the cylindrical portion 26 formed in the above shape is tapered toward the distal end, and at least a portion of the proximal side of the outer circumferential surface of the cylindrical portion 26 has Due to the force, it comes into pressure contact with the abutting bottom portion 17T.

前記ブレーキ部材２１を制動状態と制動解除状態とに切替え操作するブレーキ操作部材３１を備える。このブレーキ操作部材３１は、略円弧状をなす板状の左右の揺動腕部３２，３２を備え、これら左右の揺動腕部３２，３２の基端側を左右方向の連結部たる前部３３により連結すると共に、それら左右の揺動腕部３２，３２の先端側（後側）を踏み部たる左右方向の踏み板３４により連結して枠状をなす。 A brake operating member 31 is provided for switching the brake member 21 between a braking state and a braking release state. This brake operating member 31 includes plate-shaped left and right rocking arms 32, 32 having a substantially arc shape, and the proximal ends of these left and right rocking arms 32, 32 are connected to a front part that is a connecting part in the left-right direction. 33, and the distal ends (rear sides) of the left and right swinging arms 32, 32 are connected by a left-right step plate 34 serving as a step to form a frame shape.

また、図４に示すように、ブラケット１１の後部にブレーキ操作部材３１の先端を挿入した状態で、ブラケット１１の左右の側板部１３，１３の透孔１３Ｔ，１３Ｔ（図２）とブレーキ操作部材３１の左右の揺動腕部３２，３２の基端側の透孔３２Ｔ，３２Ｔ（図２）とに、ブレーキ操作部材用横軸たるボルト４１を挿通し、この挿通したボルト４１にナット４１Ａを螺合し、これによりブレーキ操作部材３１の基端側に挿通したボルト４１を中心として、本体部材８のブラケット１１にブレーキ操作部材３１を軸支している。 Further, as shown in FIG. 4, when the tip of the brake operating member 31 is inserted into the rear part of the bracket 11, the brake operating member A bolt 41 serving as a horizontal shaft for a brake operating member is inserted into the through holes 32T, 32T (FIG. 2) on the base end side of the left and right swinging arms 32, 31, and a nut 41A is attached to the inserted bolt 41. The brake operating member 31 is pivotally supported by the bracket 11 of the main body member 8 around the bolt 41 that is screwed together and inserted into the base end side of the brake operating member 31 .

尚、ボルト４１は、先端側のみにナット４１Ａが螺合する雌螺子部（図示せず）が形成され、雌螺子部の無いボルト４１の軸部に揺動腕部３２，３２が回動可能に設けられ、他の上述したボルト２４も同様に先端側のみに雌螺子部が形成されている。 Note that the bolt 41 has a female thread (not shown) formed only on the tip side, into which the nut 41A is screwed, and the swinging arms 32, 32 can rotate on the shaft of the bolt 41, which does not have a female thread. Similarly, the other bolts 24 mentioned above are provided with female threads only on the tip side.

図１などに示すように、前記ボルト２４は車輪６の外周面６Ｇの上方に位置する。また、筒部２６は、前記ボルト２４から離れた下方で、車輪６の回転中心であるボルト１０の上方に位置する。さらに、平面視で、ボルト４１の位置は、前記ボルト２４及び筒部２６の位置より後方に位置する。 As shown in FIG. 1 and the like, the bolt 24 is located above the outer peripheral surface 6G of the wheel 6. Further, the cylindrical portion 26 is located below and away from the bolt 24 and above the bolt 10, which is the center of rotation of the wheel 6. Furthermore, in plan view, the bolt 41 is located at the rear of the bolt 24 and the cylindrical portion 26.

図２に示すように、前記揺動腕部３２には、前記前部３３側に位置する直線状の上縁５１と前縁５２との角部に、乗り越え突起たる湾曲状の凸部５３を設け、この凸部５３の下部に、前記筒部２６が圧接する位置決め用凹部５４を設け、この位置決め用凹部５４は前記筒部２６の外周に対応して円弧状をなす。 As shown in FIG. 2, the swinging arm portion 32 has a curved convex portion 53, which is a protrusion for climbing over, at the corner between the linear upper edge 51 and the front edge 52 located on the front portion 33 side. A positioning recess 54 with which the cylindrical portion 26 presses is provided at the lower part of the convex portion 53, and the positioning recess 54 has an arc shape corresponding to the outer periphery of the cylindrical portion 26.

また、その位置決め用凹部５４の下部に乗り越え突起たる湾曲状の凸部５５を設け、この凸部５５の下部に前記筒部２６が圧接する制動用凹部５６を設け、この制動用凹部５６の下部に凸部５７を設けている。尚、凹部５４，５６の一方に筒部２６が係止した状態で、前縁５２の上下の凸部５３，５７間は、ボルト４１の前方に位置する。また、ボルト４１の中心に対して、凹部５４に比べて凹部５６は離れた位置にある。 Further, a curved convex portion 55 as a climbing projection is provided at the lower part of the positioning concave portion 54, a braking concave portion 56 to which the cylinder portion 26 comes into pressure contact is provided at the bottom of this convex portion 55, and a lower portion of this braking concave portion 56 is provided. A convex portion 57 is provided on. In addition, in a state in which the cylindrical portion 26 is locked in one of the recesses 54 and 56, the space between the upper and lower convex portions 53 and 57 of the front edge 52 is located in front of the bolt 41. Furthermore, the recess 56 is located further away from the center of the bolt 41 than the recess 54 .

図１及び図２に示すように、筒部２６が当接底部１７Ｔに圧接し、位置決め用凹部５４に筒部２６が嵌合した状態では、ブレーキ板２３の制動部２３Ｓが外周面６Ｇから離れた制動解除状態となり、ブレーキ操作部材３１は前記嵌合により上方位置（図１）に位置決め状態となる。 As shown in FIGS. 1 and 2, when the cylinder part 26 is in pressure contact with the contact bottom part 17T and the cylinder part 26 is fitted into the positioning recess 54, the braking part 23S of the brake plate 23 is separated from the outer peripheral surface 6G. The brake is released, and the brake operating member 31 is positioned at the upper position (FIG. 1) due to the above-mentioned fitting.

この上方位置から踏み板３４が上側に上がるようにブレーキ操作部材３１を上方向に回転すると、凸部５３に押されて筒部２６が制動解除方向Ｋ（前方）に僅かに移動した後、筒部２６が凸部５３を乗り越え、再び筒部２６が当接底部１７Ｔに圧接する。尚、凸部５３が筒部２６の下部に位置する状態で、ブレーキ操作部材３１はその前部３３が外周面６Ｇに当たる位置まで制動解除方向Ｋに回動可能である。 When the brake operating member 31 is rotated upward from this upper position so that the footboard 34 rises upward, the cylindrical portion 26 is pushed by the convex portion 53 and moves slightly in the brake release direction K (forward), and then the cylindrical portion 26 climbs over the convex portion 53, and the cylindrical portion 26 comes into pressure contact with the contact bottom portion 17T again. In addition, with the convex part 53 located at the lower part of the cylindrical part 26, the brake operating member 31 can rotate in the brake release direction K to the position where the front part 33 touches the outer circumferential surface 6G.

そして、筒部２６が当接底部１７Ｔに圧接することにより、ブレーキ板２３が制動解除位置に位置決めされる。 The brake plate 23 is positioned at the brake release position by the cylindrical portion 26 coming into pressure contact with the contact bottom portion 17T.

図２及び図６に示す位置決め用凹部５４に筒部２６が嵌合した状態から、踏み板３４を下方に踏むと、凸部５５に押されて筒部２６が制動解除方向Ｋ（前方）に僅かに移動した後、筒部２６が凸部５５を乗り越え、筒部２６が制動用凹部５６に嵌合する。この嵌合した状態で、図６に示すように、制動用凹部５６は当接底部１７Ｔに比べて前方に位置し、筒部２６が前方に移動すると共にブレーキ部材２１が制動方向Ｓに回転し、制動部２３Ｓが外周面６Ｇに圧接した制動状態となる。尚、制動用凹部５６に筒部２６が嵌合した位置がブレーキ操作部材３１の下方位置（図３）である。 When the cylindrical part 26 is fitted into the positioning recess 54 shown in FIGS. 2 and 6, when stepping on the footboard 34 downward, the cylindrical part 26 is pushed by the convex part 55 and moved slightly in the brake release direction K (forward). After moving to , the cylindrical portion 26 climbs over the convex portion 55, and the cylindrical portion 26 fits into the braking recess 56. In this fitted state, as shown in FIG. 6, the braking recess 56 is located forward compared to the abutment bottom 17T, and as the cylindrical portion 26 moves forward, the brake member 21 rotates in the braking direction S. , the brake portion 23S is in a braking state in pressure contact with the outer circumferential surface 6G. The position where the cylinder part 26 fits into the braking recess 56 is the lower position of the brake operating member 31 (FIG. 3).

図６に示すように、制動用凹部５６に筒部２６が圧接した状態では、ボルト２４の中心と筒部２６の中心とを結ぶ仮想線（図示せず）の延長線上の近傍、又は、仮想線の前側に凸部５７が位置するため、ブレーキ操作部材３１を制動方向Ｓに回そうとしても、筒部２６を前側に押す分力が発生しないため、その位置から制動方向Ｓにブレーキ操作部材３１を回すことができず、ブレーキ操作部材３１の先端側である踏み板３４側を下に回すことが規制される。 As shown in FIG. 6, when the cylinder part 26 is in pressure contact with the braking recess 56, the area near the extension of an imaginary line (not shown) connecting the center of the bolt 24 and the center of the cylinder part 26, or the virtual Since the convex portion 57 is located on the front side of the line, even if an attempt is made to turn the brake operating member 31 in the braking direction S, a force pushing the cylindrical portion 26 forward is not generated, so that the brake operating member is rotated in the braking direction S from that position. 31 cannot be rotated, and downward rotation of the footboard 34 side, which is the tip side of the brake operating member 31, is restricted.

このように凸部５７は、ブレーキ操作部材３１の制動解除方向Ｋへの回り止めとして機能する回り止め部となる。尚、凹部５６に嵌合した位置が筒部２６の最大前方移動位置であり、この位置の筒部２６の中心より、平面視でボルト２４の中心が前側に位置し、平面視で最大前方移動位置の筒部２６の中心の後方に前記ボルト４１の中心が位置する。 In this way, the convex portion 57 becomes a rotation preventing portion that functions as a rotation prevention device for the brake operating member 31 in the brake release direction K. Note that the position where the cylindrical portion 26 fits into the recess 56 is the maximum forward movement position of the cylindrical portion 26, and the center of the bolt 24 is located in front of the center of the cylindrical portion 26 at this position in a plan view, and the maximum forward movement is in the plan view. The center of the bolt 41 is located behind the center of the cylindrical portion 26.

また、図６に示す制動用凹部５６に筒部２６が圧接したブレーキ操作部材３１の下方位置において、ブレーキ操作部材３１を上方位置に切替えるには、ダブルトーションバネ２７の付勢に抗して、筒部２６が凸部５５を乗り越える必要があるため、所定以上の力が必要となる。このためブレーキ操作部材３１に単に接触しただけでは、ブレーキ操作部材３１は下方位置に保持され、このように凸部５５は、ブレーキ操作部材３１の制動解除方向Ｋ及び制動方向Ｓの回り止め効果を奏する。尚、前記凸部５３及び後述する凸部も同様に回り止め効果を奏する。 In addition, in order to switch the brake operating member 31 to the upper position from the lower position of the brake operating member 31 where the cylindrical portion 26 is in pressure contact with the braking recess 56 shown in FIG. Since the cylindrical portion 26 needs to overcome the convex portion 55, a force exceeding a predetermined level is required. Therefore, simply contacting the brake operating member 31 causes the brake operating member 31 to be held in the lower position, and the convex portion 55 prevents the brake operating member 31 from rotating in the brake release direction K and the braking direction S. play. Incidentally, the convex portion 53 and the convex portions described later also have a rotation preventing effect.

このように本実施例では、請求項１に対応して、車輪６を回動可能に軸支する本体部材８と、本体部材８に回動可能に軸支されると共に、制動部２３Ｓが車輪６に近付く制動方向Ｓに回転して車輪６の外周面６Ｇを押圧可能なブレーキ部材２１と、制動部２３Ｓが車輪６の外周面６Ｇから離れる制動解除方向Ｋにブレーキ部材２１を付勢する付勢手段たるダブルトーションバネ２７と、ブレーキ部材２１に設けられた作動部たる筒部２６と、本体部材８に回動可能に軸支されたブレーキ操作部材３１とを備え、ブレーキ操作部材３１の先端側を下方向に回転することにより、ブレーキ操作部材３１が筒部２６を押してブレーキ部材２１が制動方向Ｓに回転し、この制動方向Ｓの回転により制動部２３Ｓが車輪６の外周面６Ｇを押圧するように構成したから、ブレーキ操作部材３１の先端側を下方向に回転すると、ブレーキ操作部材３１が筒部２６を押してブレーキ部材２１が制動方向Ｓに回転し、制動部２３Ｓが車輪６の外周面６Ｇを押圧する制動状態とすることができ、ブレーキ部材２１に設けた筒部２６とブレーキ操作部材３１とにより制動状態に切替える構造であるから、構造が比較的簡易で、製造が容易となる。 In this way, in accordance with claim 1, in this embodiment, the main body member 8 rotatably supports the wheel 6, and the brake part 23S is rotatably supported by the main body member 8, and the brake part 23S is rotatably supported on the main body member 8. A brake member 21 that can rotate in a braking direction S approaching the outer circumferential surface 6G of the wheel 6 to press the outer circumferential surface 6G of the wheel 6; It includes a double torsion spring 27 as a force means, a cylindrical part 26 as an actuating part provided on the brake member 21, and a brake operating member 31 rotatably supported by the main body member 8. By rotating the side downward, the brake operating member 31 pushes the cylinder part 26 and the brake member 21 rotates in the braking direction S, and this rotation in the braking direction S causes the braking part 23S to press the outer peripheral surface 6G of the wheel 6. Therefore, when the distal end side of the brake operating member 31 is rotated downward, the brake operating member 31 pushes the cylindrical portion 26 and the brake member 21 rotates in the braking direction S, and the braking portion 23S moves toward the outer periphery of the wheel 6. Since the braking state can be achieved by pressing the surface 6G, and the braking state is switched to the braking state by the cylindrical portion 26 provided on the brake member 21 and the brake operating member 31, the structure is relatively simple and manufacturing is easy. .

このように本実施例では、請求項２に対応して、ブレーキ操作部材３１は、作動部たる筒部２６に対応して揺動腕部３２を有し、本体部材８に揺動腕部３２の基端側を回動可能に軸支し、揺動腕部３２の先端側を下方向に回転することより、揺動腕部３２が筒部２６を押してブレーキ部材２１が制動方向Ｓに回転し、この制動方向Ｓの回転により制動部２３Ｓが車輪６の外周面６Ｇを押圧し、制動部２３Ｓが車輪６の外周面６Ｇを押圧した位置で、筒部２６が係止する係止部たる制動用凹部５６を、揺動腕部３２に設けたから、ブレーキ操作部材３１の先端側を下方向に回転すると、揺動腕部３２が筒部２６を押してブレーキ部材２１が車輪６の外周面６Ｇに押圧することより、車輪６を制動状態にすることができる。また、揺動腕部３２の制動用凹部５６に筒部２６が係止することにより、制動位置でブレーキ操作部材３１が位置固定される。 As described above, in this embodiment, the brake operating member 31 has the swinging arm part 32 corresponding to the cylinder part 26 which is the actuating part, and the swinging arm part 32 is attached to the main body member 8. By rotatably supporting the proximal end of the swinging arm 32 and rotating the distal end of the swinging arm 32 downward, the swinging arm 32 pushes the cylindrical part 26 and the brake member 21 rotates in the braking direction S. Then, due to this rotation in the braking direction S, the braking part 23S presses the outer circumferential surface 6G of the wheel 6, and at the position where the braking part 23S presses the outer circumferential surface 6G of the wheel 6, the cylindrical part 26 becomes a locking part. Since the braking recess 56 is provided in the swinging arm 32, when the distal end side of the brake operating member 31 is rotated downward, the swinging arm 32 pushes the cylindrical part 26 and the brake member 21 pushes against the outer peripheral surface 6G of the wheel 6. By pressing , the wheels 6 can be brought into a braking state. Moreover, by locking the cylindrical portion 26 in the braking recess 56 of the swinging arm portion 32, the brake operating member 31 is fixed at the braking position.

このように本実施例では、請求項３に対応して、本体部材８に設けられ、制動部２３Ｓが車輪６の外周面６Ｇから離れた位置で作動部たる筒部２６が当接してブレーキ部材２１の制動解除方向Ｋの回転を規制する当接受部たる当接底部１７Ｔを備えるから、制動部２３Ｓが車輪６の外周面６Ｇから離れた位置で、筒部２６が本体部材８の当接底部１７Ｔに当接してブレーキ部材２１の制動解除方向Ｋの回転が規制される。このように筒部２６を利用してブレーキ部材２１の制動解除方向Ｋの回転を規制するため、付勢手段により制動解除方向Ｋに付勢されているブレーキ部材２１の制動解除方向Ｋへの回り止め構造を、別途に設ける必要が無くなる。 In this embodiment, in accordance with claim 3, the braking part 23S is provided in the main body member 8, and the cylindrical part 26 serving as the actuating part comes into contact with the braking part 23S at a position away from the outer circumferential surface 6G of the wheel 6. Since the cylindrical portion 26 is provided with the abutting bottom portion 17T, which is an abutting receiving portion that restricts the rotation of the brake member 21 in the brake release direction K, at a position where the braking portion 23S is away from the outer circumferential surface 6G of the wheel 6, the cylindrical portion 26 touches the abutting bottom portion of the main body member 8. 17T, the rotation of the brake member 21 in the brake release direction K is restricted. In this way, since the rotation of the brake member 21 in the brake release direction K is restricted using the cylindrical portion 26, the rotation of the brake member 21 in the brake release direction K, which is biased in the brake release direction K by the biasing means, is restricted. There is no need to separately provide a stop structure.

以下、実施例上の効果として、本体部材８は、フォーク７と、このフォーク７の後方に取り付けたブラケット１１とからなり、このブラケット１１の前側が開口した開口溝部１６の後部に、筒部２６を案内する案内溝部１７を設けると共に、筒部２６が当接する当接底部１７Ｔを設けたから、ブラケット１１にブレーキ部材２１とダブルトーションバネ２７とブレーキ操作部材３１を取り付けた後、ブラケット１１をフォーク７に取り付けることができ、構造が比較的簡易にして、製造も容易となる。 Hereinafter, as an effect of the embodiment, the main body member 8 consists of a fork 7 and a bracket 11 attached to the rear of the fork 7, and a cylindrical part 26 is attached to the rear of the opening groove part 16 which is opened at the front side of the bracket 11. Since the guide groove 17 for guiding the fork 7 and the contact bottom 17T for the cylinder 26 to abut are provided, after the brake member 21, double torsion spring 27, and brake operating member 31 are attached to the bracket 11, the bracket 11 is attached to the fork 7. The structure is relatively simple and manufacturing is easy.

また、ブラケット１１にフォーク７を取り付けると、開口溝部１６の案内溝部１７の前側がフォーク７の後縁７Ｕ（図２）により塞がれ、フォーク７により筒部２６の前方移動を規制することができる。このように開口溝部１６と後縁７Ｕ内に筒部２６を配置することができ、先行文献１のように下転動孔に輪状突部を挿入して組立てる必要がなく、製造を容易に行うことができる。 Furthermore, when the fork 7 is attached to the bracket 11, the front side of the guide groove 17 of the opening groove 16 is closed by the rear edge 7U (FIG. 2) of the fork 7, and the forward movement of the cylindrical portion 26 is restricted by the fork 7. can. In this way, the cylindrical portion 26 can be arranged within the opening groove portion 16 and the rear edge 7U, and there is no need to insert the annular protrusion into the lower rolling hole for assembly as in prior document 1, and manufacturing is facilitated. be able to.

また、筒部２６は金属製の側板部２２をプレスによる塑性加工により形成したものであるから、製造が容易で、筒部２６が当接底部１７Ｔに直接当接するから、筒部２６に他の部材を挿通する必要がなく、構造簡易となる。 Further, since the cylindrical portion 26 is formed by plastic working the metal side plate portion 22 using a press, it is easy to manufacture, and since the cylindrical portion 26 directly abuts the abutment bottom portion 17T, other There is no need to insert any member, which simplifies the structure.

また、揺動腕部３２には、前部３３側に位置する上縁５１と前縁５２との角部に、乗り越え突起たる湾曲状の凸部５３を設け、この凸部５３の下部に、前記筒部２６が圧接する位置決め用凹部５４を設け、この位置決め用凹部５４は前記筒部２６の外周に対応して円弧状をなすから、凸部５３を筒部２６が通過する際、所定の反力が得られ、乗り越えた後、筒部２６が位置決め用凹部５４にスムーズに嵌合する。 Further, the swinging arm portion 32 is provided with a curved convex portion 53 serving as a climbing protrusion at the corner between the upper edge 51 and the front edge 52 located on the front portion 33 side. A positioning recess 54 with which the cylindrical portion 26 is pressed is provided, and the positioning recess 54 has an arc shape corresponding to the outer periphery of the cylindrical portion 26, so that when the cylindrical portion 26 passes through the convex portion 53, a predetermined position is formed. After the reaction force is obtained and overcome, the cylindrical portion 26 smoothly fits into the positioning recess 54.

また、位置決め用凹部５４の下部に乗り越え突起たる湾曲状の凸部５５を設け、この凸部５５の下部に前記筒部２６が圧接する制動用凹部５６を設け、この制動用凹部５６の下部に凸部５７を設けているから、同様に、乗り越えた後、筒部２６が制動用凹部５６にスムーズに嵌合すると共に、嵌合後、回り止め部たる凸部５７によりブレーキ操作部材３１の下方向への回転を止めることができる。 Further, a curved convex portion 55 as a climbing projection is provided at the lower part of the positioning recess 54, a braking recess 56 to which the cylinder portion 26 comes into pressure contact is provided at the lower part of the convex portion 55, and a braking recess 56 is provided at the lower part of the braking recess 56. Since the convex portion 57 is provided, the cylindrical portion 26 fits smoothly into the braking concave portion 56 after climbing over, and after fitting, the convex portion 57 serving as a rotation stopper allows the cylindrical portion 26 to fit under the brake operating member 31. You can stop rotation in any direction.

また、揺動腕部３２には、前部３３側に位置する上縁５１と前縁５２との角部に、乗り越え突起たる湾曲状の凸部５３を設け、この凸部５３の下部に、前記筒部２６が圧接する位置決め用凹部５４を設けたから、この位置決め用凹部５４に筒部２６が嵌合することにより、上方位置でブレーキ操作部材３１が位置決めされる。 Further, the swinging arm portion 32 is provided with a curved convex portion 53 serving as a climbing protrusion at the corner between the upper edge 51 and the front edge 52 located on the front portion 33 side. Since the positioning recess 54 with which the cylindrical portion 26 presses is provided, the brake operating member 31 is positioned at the upper position by fitting the cylindrical portion 26 into the positioning recess 54.

図７～図１０は本発明の実施例２を示し、上記実施例１と同一部分に同一符号を付し、その説明を省略して詳述する。同図は、識別部材を備えたキャスター１の例を示す。 7 to 10 show a second embodiment of the present invention, in which the same parts as in the first embodiment are given the same reference numerals, and the explanation thereof will be omitted and will be described in detail. The figure shows an example of a caster 1 equipped with an identification member.

図７に示すように、この例のキャスター１は、前記中皿部材５を用いることなく、上皿部材２にフォーク７の上部７Ａを回動自在に連結している。また、上皿部材２とフォーク７の上部の間には、防塵カバー６０が配置されている。 As shown in FIG. 7, in the caster 1 of this example, the upper part 7A of the fork 7 is rotatably connected to the upper plate member 2 without using the inner plate member 5. Further, a dustproof cover 60 is arranged between the upper plate member 2 and the upper part of the fork 7.

また、この例のブレーキ操作部材３１Ａは、前後方向に長い略長方形形状の左右の揺動腕部３２，３２を備え、これら左右の揺動腕部３２，３２の上縁５１，５１を、踏み部たる左右方向の踏み板３４により連結し、その踏み板３４は揺動腕部３２，３２の後端から張り出す部分を有する。また、踏み板３４の前縁３４Ｍと車輪６の外周面６Ｇとの間に隙間３５ができるように、前記ブレーキ操作部材３１Ａが回動する。 Further, the brake operating member 31A of this example includes left and right swinging arms 32, 32 having a generally rectangular shape long in the front-rear direction, and the upper edges 51, 51 of these left and right swinging arms 32, 32 are stepped on. They are connected by a left-right foot plate 34, which has a portion projecting from the rear end of the swing arm portions 32, 32. Further, the brake operating member 31A rotates so that a gap 35 is created between the front edge 34M of the footboard 34 and the outer peripheral surface 6G of the wheel 6.

また、図８に示すように、ブラケット１１の側板部１３，１３の後部内面に、ブレーキ操作部材３１Ａの先端側を挿入した状態で、ブラケット１１の左右の側板部１３，１３の透孔１３Ｔ，１３Ｔとブレーキ操作部材３１の左右の揺動腕部３２，３２の上部中央の透孔３２Ｔ，３２Ｔに、ブレーキ操作部材用横軸たるボルト４１を挿通し、この挿通したボルト４１にナット４１Ａを螺合してブラケット１１にブレーキ操作部材３１Ａを回動自在に軸支している。 Further, as shown in FIG. 8, when the front end side of the brake operating member 31A is inserted into the rear inner surface of the side plate parts 13, 13 of the bracket 11, the through holes 13T of the left and right side plate parts 13, 13 of the bracket 11, 13T and the through holes 32T, 32T at the upper center of the left and right swing arms 32, 32 of the brake operating member 31, insert the bolt 41, which is the horizontal axis for the brake operating member, and screw the nut 41A onto the inserted bolt 41. At the same time, a brake operating member 31A is rotatably supported on the bracket 11.

図９及び図１０に示すように、前記揺動腕部３２，３２の上縁５１と前縁５２との間に上向きの凸部６１を設け、この凸部６１に連続して前縁５２の上部に係合凹部６２が形成されている。そして、当接底部１７Ｔに当接する筒部２６に、前記係合凹部６２が係合する状態で、前記踏み板３４が前記上皿部材２の上面と平行で略水平となる。この例では、この踏み板３４が略水平となる位置がブレーキ操作部材３１Ａの上方位置（図９）である。 As shown in FIGS. 9 and 10, an upward convex portion 61 is provided between the upper edge 51 and the front edge 52 of the swing arm portions 32, 32, and the front edge 52 is continuous with the convex portion 61. An engagement recess 62 is formed in the upper part. Then, in a state in which the engagement recess 62 is engaged with the cylindrical portion 26 that abuts the abutting bottom portion 17T, the footboard 34 becomes parallel to the upper surface of the upper plate member 2 and substantially horizontal. In this example, the position where the footboard 34 is approximately horizontal is the upper position of the brake operating member 31A (FIG. 9).

ブレーキ操作部材３１Ａが上方位置では、図９に示すように、筒部２６が係合凹部６２に係合し、ここから制動方向Ｓに回転するには、筒部２６を前側に押す力が必要となり、踏み板３４を踏むまで、ブレーキ操作部材３１Ａが上方位置で保持される。 When the brake operating member 31A is in the upper position, as shown in FIG. 9, the cylindrical portion 26 engages with the engagement recess 62, and in order to rotate from there in the braking direction S, a force pushing the cylindrical portion 26 forward is required. Thus, the brake operating member 31A is held at the upper position until the footboard 34 is stepped on.

また、前記前縁５２の下部には制動用凹部６３が形成され、この制動用凹部６３の底部は前記係合凹部６２の底部に比べて前記ボルト４１の中心から離れている。また、前記前縁５２には、係合凹部６２と制動用凹部６３との間に湾曲状凸部６４が形成され、この湾曲状凸部６４は、略前記ボルト４１を中心とした円弧状をなし、その半径は前記ボルト４１の中心と制動用凹部６３の底部との間隔に略等しい。また、前縁５２には、制動用凹部６３の下部に凸部６５を設けている。 Further, a braking recess 63 is formed in the lower part of the front edge 52, and the bottom of the braking recess 63 is farther from the center of the bolt 41 than the bottom of the engagement recess 62. Further, a curved convex portion 64 is formed on the front edge 52 between the engagement concave portion 62 and the braking concave portion 63, and this curved convex portion 64 has an arc shape approximately centered on the bolt 41. No, the radius is approximately equal to the distance between the center of the bolt 41 and the bottom of the braking recess 63. Further, the front edge 52 is provided with a convex portion 65 below the braking recess 63.

そして、筒部２６に係合凹部６２が係合したブレーキ操作部材３１Ａの上方位置から、ブレーキ操作部材３１Ａの踏み板３４を下方に押し下げると、ブレーキ操作部材３１Ａの回転に伴って湾曲状凸部６４が筒部２６を前方に押し、筒部２６が制動用凹部６３に嵌合してブレーキ操作部材３１Ａが下方位置で停止する（図１０）。前記筒部２６の前方への移動により制動部２３Ｓが下方向に回動し、制動部２３Ｓが外周面６Ｇに圧接し、車輪６が制動状態となる。 Then, when the footplate 34 of the brake operation member 31A is pushed down from the upper position of the brake operation member 31A where the engagement recess 62 is engaged with the cylindrical portion 26, the curved convex portion 64 rotates as the brake operation member 31A rotates. pushes the cylindrical portion 26 forward, the cylindrical portion 26 fits into the braking recess 63, and the brake operating member 31A stops at the lower position (FIG. 10). The forward movement of the cylindrical portion 26 causes the brake portion 23S to rotate downward, and the brake portion 23S comes into pressure contact with the outer circumferential surface 6G, so that the wheel 6 is placed in a braked state.

また、車輪６の制動及び制動解除状態を示す識別機構７１を備える。この識別機構７１は、ブレーキ操作部材３１Ａに連動し、左右方向に長い識別部材７２と、この識別部材７２をブレーキ操作部材３１Ａ上に出没するように作動する作動部材７３とを備える。また、前記識別部材７２は合成樹脂などからなる。 It also includes an identification mechanism 71 that indicates the braking and braking release states of the wheels 6. The identification mechanism 71 includes an identification member 72 that is interlocked with the brake operating member 31A and is long in the left-right direction, and an actuation member 73 that operates so that the identification member 72 appears and retracts on the brake operating member 31A. Further, the identification member 72 is made of synthetic resin or the like.

図９及び図１０に示すように、前記識別部材７２は、金属製であって、上辺部７４Ｕとこれより長い縦片部７４Ｔを有する断面略逆Ｌ型の回動部材７４と、この回動部材７４の前面の左右に一体に突設した軸受部７５，７５とを備え、これら左右の軸受部７５，７５に上述したボルト４１を挿通してブラケット１１に回動可能に設けられている。尚、左右の軸受部７５，７５は、ブラケット１１の側板部１３，１３の内面間に配置される。 As shown in FIGS. 9 and 10, the identification member 72 includes a rotating member 74 that is made of metal and has an approximately inverted L-shaped cross section and has an upper side portion 74U and a longer vertical piece portion 74T. The member 74 is provided with bearing parts 75, 75 integrally projecting on the left and right sides of the front surface of the member 74, and is rotatably provided on the bracket 11 by inserting the above-mentioned bolt 41 into these left and right bearing parts 75, 75. Note that the left and right bearing parts 75, 75 are arranged between the inner surfaces of the side plate parts 13, 13 of the bracket 11.

また、回動部材７４の後面には、赤色や白色などの合成樹脂製の識別パッド７６が固定されている。この識別パッド７６は左右方向に長い長方形形状をなし、識別パッド７６の後面７６Ｕが識別表示部である。尚、図８に示す後面７６Ｕは白色である。 Furthermore, an identification pad 76 made of synthetic resin, such as red or white, is fixed to the rear surface of the rotating member 74. The identification pad 76 has a rectangular shape that is elongated in the left-right direction, and the rear surface 76U of the identification pad 76 is an identification display portion. Note that the rear surface 76U shown in FIG. 8 is white.

図９及び図１０に示すように、前記作動部材７３は、板状をなす本体８１の後側（基端側）に左右の軸受部８２，８２を設け、これら左右の軸受部８２，８２を前記左右の揺動腕部３２，３２の間に配置すると共に、左右の軸受部８２，８２と左右の揺動腕部３２，３２にボルト８３を挿通し、このボルト８３にナット８３Ａを螺合してブレーキ操作部材３１Ａに作動部材７３を揺動可能に連結している。尚、ボルト８３も前記ボルト２４，４１と同様に先端側のみに雌螺子部が形成されている。 As shown in FIGS. 9 and 10, the actuating member 73 has left and right bearing parts 82, 82 provided on the rear side (base end side) of a plate-shaped main body 81, and these left and right bearing parts 82, 82. A bolt 83 is disposed between the left and right swinging arms 32, 32, and is inserted through the left and right bearings 82, 82 and the left and right swinging arms 32, 32, and a nut 83A is screwed onto this bolt 83. The actuating member 73 is swingably connected to the brake operating member 31A. Note that, like the bolts 24 and 41, the bolt 83 also has a female thread formed only on the tip side.

前記本体８１の前側（先端側）には、前記識別部材７２に係合する識別部材係合部たる左右の係合腕部８４，８４が設けられると共に、これら左右の係合腕部８４，８４の間に、車輪係合部たる車輪係合腕部８５が形成されている。 On the front side (tip side) of the main body 81, left and right engaging arms 84, 84, which are identification member engaging parts that engage with the identification member 72, are provided. A wheel engaging arm portion 85, which is a wheel engaging portion, is formed between them.

本体８１を略水平にした状態で、前記係合腕部８４の先端側には、上向きに折り曲げられた上向き部８４Ａと、この上向き部８４Ａの先端から前側斜め上向きに折り曲げられた先端部８４Ｂとが設けられている。また、前記車輪係合腕部８５の先端側には、下側が凸な湾曲部８５Ａが設けられている。 With the main body 81 in a substantially horizontal state, the engagement arm 84 has an upwardly bent portion 84A on the distal end side, and a distal end portion 84B that is bent obliquely upward from the distal end of the upwardly directed portion 84A. is provided. Further, a curved portion 85A having a convex lower side is provided on the distal end side of the wheel engaging arm portion 85.

上方位置のブレーキ操作部材３１Ａにおいて、前記左右の係合腕部８４，８４の先端側下面が載置される左右の支持受部８６，８６が、左右の揺動腕部３２，３２の内面に設けられ、これら支持受部８６，８６により作動部材７３を支持した状態で、上向き部８４Ａが識別部材７２の識別パッド７６の下部の前面７６Ｍ（図９）に係合し、この識別部材７２の前側への係合により、上辺部７４Ｕの先端が、踏み板３４の前縁３４Ｍに近接した状態で識別部材７２が保持される。尚、この状態で、湾曲部８５Ａは車輪６の外周面６Ｇから離れた位置にある。 In the brake operating member 31A in the upper position, the left and right support receiving parts 86, 86 on which the lower surfaces of the distal ends of the left and right engaging arms 84, 84 are placed are mounted on the inner surfaces of the left and right swinging arms 32, 32. With the operating member 73 supported by the support receiving parts 86, 86, the upwardly facing part 84A engages with the front surface 76M (FIG. 9) of the lower part of the identification pad 76 of the identification member 72. By engaging with the front side, the identification member 72 is held in a state in which the tip of the upper side portion 74U is close to the front edge 34M of the footboard 34. In this state, the curved portion 85A is located away from the outer peripheral surface 6G of the wheel 6.

上方位置から踏み板３４を押し下げてブレーキ操作部材３１Ａを制動方向Ｓに回転すると、車輪係合腕部８４の先端が車輪６の外周面６Ｇに当たり、作動部材７３は、ボルト８３側が下がると共に車輪６に当接した先端側が上がるように回転し、図１０に示すように、左右の係合腕部８４，８４の先端部８４Ｂ，８４Ｂが縦片部７４Ｔの前面７４Ｍ（図１０）の下側を押し、この識別部材７２の前側への係合により、識別パッド７６が斜め上向きとなり、下方に回動した踏み板３４の上部に識別パッド７６が現れる。 When the footboard 34 is pushed down from the upper position and the brake operating member 31A is rotated in the braking direction S, the tip of the wheel engaging arm 84 hits the outer peripheral surface 6G of the wheel 6, and the operating member 73 is moved toward the wheel 6 as the bolt 83 side is lowered. The abutted tips rotate upward, and as shown in FIG. 10, the tips 84B, 84B of the left and right engaging arms 84, 84 push the lower side of the front surface 74M (FIG. 10) of the vertical piece 74T. By engaging the identification member 72 to the front side, the identification pad 76 faces diagonally upward, and the identification pad 76 appears above the footboard 34 that has rotated downward.

このように本実施例では、請求項１～３に対応して、上記実施例１と同様な作用・効果を奏する。 In this way, this embodiment achieves the same functions and effects as the first embodiment, corresponding to claims 1 to 3.

このように本実施例では、請求項４に対応して、ブレーキ操作部材３１の上方位置で制動部２３Ｓが車輪６の外周面６Ｇから離れ、ブレーキ操作部材３１の下方位置で制動部２３Ｓが車輪６の外周面６Ｇを押圧し、ブレーキ操作部材３１の前記上方位置で隠れ、ブレーキ操作部材３１の前記下方位置で該ブレーキ操作部材３１上に現れる識別表示部たる後面７６Ｕを備えるから、車輪６の制動解除状態で隠れていた後面７６Ｕが、制動状態でブレーキ操作部材３１上に現れるため、制動状態と制動解除状態が判り易いものとなる。 As described above, in this embodiment, the braking part 23S is separated from the outer peripheral surface 6G of the wheel 6 at the upper position of the brake operating member 31, and the braking part 23S is separated from the outer peripheral surface 6G of the wheel 6 at the lower position of the brake operating member 31. The outer peripheral surface 6G of the wheel 6 is pressed, the rear surface 76U is hidden at the upper position of the brake operating member 31, and appears on the brake operating member 31 at the lower position of the brake operating member 31. Since the rear surface 76U, which was hidden in the brake released state, appears on the brake operating member 31 in the braked state, it becomes easy to distinguish between the braked state and the brake released state.

このように本実施例では、請求項５に対応して、識別表示部たる後面７６Ｕを備えた識別部材７２を本体部材８に揺動可能に設け、ブレーキ操作部材３１の前記下方位置でブレーキ操作部材３１上に後面７６Ｕが現れるように識別部材７２に係合する作動部材７３を備え、作動部材７３の基端側をブレーキ操作部材３１に回動可能に軸支し、作動部材７３の先端側に、車輪６に係合する車輪係合部たる車輪係合腕部８５を設けると共に、車輪係合腕部８５が車輪６に係合した状態で、後面７６Ｕがブレーキ操作部材３１上に現れるように識別部材７２に係合する識別部材係合部たる係合腕部８４を設けたから、上方位置から下方位置にブレーキ操作部材３１を回転すると、車輪係合腕部８５が車輪６に係合し、係合腕部８４が識別部材７２に係合して後面７６Ｕがブレーキ操作部材３１上に現れる。 In this embodiment, in accordance with claim 5, the identification member 72 having the rear surface 76U serving as an identification display portion is swingably provided on the main body member 8, and the brake is operated at the lower position of the brake operating member 31. An actuating member 73 is provided that engages with the identification member 72 so that the rear surface 76U appears on the member 31, the proximal end of the actuating member 73 is rotatably supported on the brake operating member 31, and the distal end side of the actuating member 73 is rotatably supported on the brake operating member 31. A wheel engaging arm portion 85 as a wheel engaging portion that engages with the wheel 6 is provided, and the rear surface 76U appears on the brake operating member 31 when the wheel engaging arm portion 85 is engaged with the wheel 6. Since the engaging arm part 84 is provided as an identification member engaging part that engages with the identification member 72, when the brake operating member 31 is rotated from the upper position to the lower position, the wheel engaging arm part 85 engages with the wheel 6. , the engaging arm portion 84 engages with the identification member 72 and the rear surface 76U appears on the brake operating member 31.

以下、実施例上の効果として、上方位置から踏み板３４を押し下げると、車輪係合腕部８４の先端が車輪６の外周面６Ｇに当たり、作動部材７３は、ボルト８３側が下がると共に先端側が上がるように回転し、図１０に示すように、左右の係合腕部８４，８４の先端部８４Ｂ，８４Ｂが縦片部７４Ｔの前面７４Ｍの下側を押し、識別パッド７６が斜め上向きとなり、下方に回動した踏み板３４の上部に識別パッド７６が現れるから、ブレーキ操作部材３１Ａの上方位置から下方位置への回転に連動して、識別パッド７６の後面７６Ａを斜め後上向きにして後面７６Ｕを見易い位置とすることができる。 Hereinafter, as an effect of the embodiment, when the footboard 34 is pushed down from the upper position, the tip of the wheel engaging arm 84 hits the outer peripheral surface 6G of the wheel 6, and the actuating member 73 is moved so that the bolt 83 side goes down and the tip side goes up. As shown in FIG. 10, the tips 84B, 84B of the left and right engaging arms 84, 84 push the lower side of the front surface 74M of the vertical piece 74T, and the identification pad 76 faces diagonally upward and rotates downward. Since the identification pad 76 appears on the upper part of the moved footboard 34, in conjunction with the rotation of the brake operating member 31A from the upper position to the lower position, the rear surface 76A of the identification pad 76 is turned diagonally rearward and upward to a position where the rear surface 76U is easily seen. can do.

また、ブラケット１１にブレーキ操作部材３１Ａを取り付けるブレーキ操作部材用横軸たるボルト４１に、識別部材７２を回動可能に設けたから、識別部材７２用に枢軸を設ける必要がなく、構造簡易で製造が容易となる。さらに、識別部材７２は回動するから、現れた状態で見易い向きとすることができる。 In addition, since the identification member 72 is rotatably provided on the bolt 41, which is the horizontal shaft for the brake operating member that attaches the brake operating member 31A to the bracket 11, there is no need to provide a pivot for the identification member 72, and the structure is simple and manufacturing is easy. It becomes easier. Furthermore, since the identification member 72 rotates, it can be oriented in an easily visible direction in the exposed state.

また、作動部材７３は、識別部材７２に係合する識別部材係合部たる左右の係合腕部８４，８４と、車輪係合部たる車輪係合腕部８５とを備え、係合腕部８４，８４が識別部材７２の前側に係合し、車輪係合腕部８５が車輪６に係合することにより、識別パッド７６を出没可能に設けることができる。また、車輪係合腕部８５の先端側には、車輪６の外周面６Ｇより曲率が小さく下側が凸な湾曲部８５Ａが設けられているから、湾曲部８５Ａが外周面６Ｇに係合して作動部材７３をスムーズに傾動することができる。 The actuating member 73 also includes left and right engaging arms 84, 84, which are identification member engaging parts that engage with the identification member 72, and a wheel engaging arm 85, which is a wheel engaging part. 84, 84 are engaged with the front side of the identification member 72, and the wheel engaging arm portion 85 is engaged with the wheel 6, whereby the identification pad 76 can be provided in a retractable manner. Furthermore, since a curved portion 85A having a smaller curvature and a convex lower side than the outer circumferential surface 6G of the wheel 6 is provided on the distal end side of the wheel engaging arm portion 85, the curved portion 85A engages with the outer circumferential surface 6G. The actuating member 73 can be tilted smoothly.

尚、本発明は上記実施例に限定されるものではなく、種々の変形実施が可能である。例えば、実施例では、本体部材は、支持部材と、この支持部材に取り付ける保持部材により構成したが、支持部材と保持部材を一体にしたものでもよく、この場合は、開口溝部に代えて、作動部が所定範囲移動可能な長孔を設ければよい。また、車輪は、双輪や３つ以上の多輪でもよい。さらに、支持受部の形状は適宜選定可能である。さらに、横軸はボルト以外のものを用いてもよい。 It should be noted that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made. For example, in the embodiment, the main body member is composed of a support member and a holding member attached to the support member, but the support member and the holding member may be integrated. What is necessary is to provide a long hole in which the part can move within a predetermined range. Further, the wheels may be twin wheels or multiple wheels having three or more wheels. Furthermore, the shape of the support receiving part can be selected as appropriate. Furthermore, the horizontal axis may be made of something other than a bolt.

１キャスター
６車輪
６Ｇ外周面
８本体部材
１７Ｔ当接底部（当接部）
２１ブレーキ部材
２３Ｓ制動部
２６筒部（作動部）
２７ダブルトーションバネ（付勢手段）
３１，３１Ａブレーキ操作部材
３２揺動腕部
３４踏み板（踏み部）
５２前縁
５６制動用凹部（係止部）
６３制動用凹部（係止部）
７２識別部材
７３作動部材
７６Ｕ後面（識別表示部）
８４係合腕部（識別部材係合部）
８５車輪係合腕部（車輪係合部） 1 Caster 6 Wheel 6G Outer peripheral surface 8 Main body member 17T Contact bottom (contact part)
21 Brake member 23S Braking part 26 Cylindrical part (actuating part)
27 Double torsion spring (biasing means)
31, 31A Brake operating member 32 Swinging arm portion 34 Tread plate (tread portion)
52 Front edge 56 Braking recess (locking part)
63 Braking recess (locking part)
72 Identification member 73 Operating member 76U Rear surface (identification display section)
84 Engagement arm portion (identification member engagement portion)
85 Wheel engaging arm (wheel engaging part)

Claims

a main body member rotatably supporting the wheel;
a brake member rotatably supported by the main body member and capable of rotating in a braking direction in which a braking portion approaches the wheel to press the outer circumferential surface of the wheel;
urging means for urging the brake member in a brake release direction in which the braking portion moves away from the outer circumferential surface of the wheel;
an actuation section provided on the brake member;
and a brake operating member rotatably supported by the main body member,
By rotating the distal end side of the brake operating member downward, the brake operating member pushes the operating section and the brake member rotates in the braking direction, and this rotation in the braking direction causes the braking section to move toward the wheel. A caster configured to press the outer peripheral surface.

The brake operating member has a swinging arm corresponding to the operating portion,
a base end side of the swinging arm portion is rotatably supported on the main body member;
By rotating the distal end side of the swinging arm downward, the swinging arm pushes the actuating part and the brake member rotates in the braking direction, and this rotation in the braking direction causes the braking part to rotate in the braking direction. Pressing the outer peripheral surface of the wheel,
2. The caster according to claim 1, wherein the swinging arm is provided with a locking portion that locks the operating portion at a position where the brake portion presses the outer circumferential surface of the wheel.

The main body member includes a contact receiving part that is provided on the main body member and that the actuating part comes into contact with at a position where the braking part is away from the outer circumferential surface of the wheel to restrict rotation of the brake member in the brake release direction. The caster according to claim 1 or 2.

The braking part moves away from the outer circumferential surface of the wheel at a position above the brake operating member, and the braking part presses the outer circumferential surface of the wheel at a position below the brake operating member,
The caster according to claim 1 or 2, further comprising an identification display section that is hidden at the upper position of the brake operating member and appears on the brake operating member at the lower position of the brake operating member.

an identification member including the identification display portion is swingably provided on the main body member;
an actuating member that engages with the identification member so that the identification display portion appears on the brake operating member at the lower position of the brake operating member;
a proximal end side of the actuating member is rotatably supported on the brake operating member;
A wheel engaging portion that engages with the wheel is provided on the tip side of the operating member, and the identification display portion appears on the brake operating member when the wheel engaging portion is engaged with the wheel. The caster according to claim 4, further comprising an identification member engaging portion that engages with the identification member.