JP2008290628A - Caster - Google Patents

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JP2008290628A
JP2008290628A JP2007139532A JP2007139532A JP2008290628A JP 2008290628 A JP2008290628 A JP 2008290628A JP 2007139532 A JP2007139532 A JP 2007139532A JP 2007139532 A JP2007139532 A JP 2007139532A JP 2008290628 A JP2008290628 A JP 2008290628A
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tire
caster
wheel
tire portion
outer peripheral
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Mitsuzo Hayashi
光蔵 林
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Chunichi Co Ltd
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Chunichi Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a caster capable of immediately recognizing abrasion of a tire part from outer appearance of the tire part and useful for recognition of adjusting time of braking force, etc. <P>SOLUTION: This caster 1 is formed so that a wheel 3 is axially supported free to rotate on a lower part of a fork 2 formed in two forked off branches and the tire part 5 is installed on an outer peripheral part of a wheel base 4. A brake control system to apply braking on a braking member 10 by pressing it is provided on an outer peripheral part of the tire part 5. A marked member 6 colored differently from the tire part 5 is buried inside of the tire part 5 of the wheel 3. A part of the marked member 6 is exposed to an outer periphery of the tire part 5 when the outer peripheral part of the tire part 5 is worn by using the caster 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、各種台車等の移動体の車輪として使用されるキャスターに関し、特にブレーキ装置を備えたキャスターに関する。   The present invention relates to a caster used as a wheel of a moving body such as various carts, and more particularly to a caster provided with a brake device.

各種の用途に使用される台車等の車輪として、キャスターが広く使用されている。この種のキャスターは、通常、二又状のフォークの内側に車輪が回転自在に軸支され、車輪は、ホイールの外周部に合成ゴムまたは天然ゴムを成形材料として、ソリッドのタイヤ部を成形して形成される。   Casters are widely used as wheels for trucks used for various purposes. This type of caster usually has a wheel rotatably supported inside a bifurcated fork, and the wheel forms a solid tire portion using synthetic rubber or natural rubber as a molding material on the outer periphery of the wheel. Formed.

また、この種のキャスターとして、ブレーキ装置付きのキャスターが製造され、台車など各種の用途に使用されている（例えば下記特許文献１を参照）。この種のブレーキ装置は、通常、ブレーキ部材が揺動可能に装着され、ブレーキばねの付勢力または使用者のブレーキ操作力により、ブレーキ部材をタイヤ部の外周部に押し付けてブレーキをかけるように構成される。
実公昭５５−１６７２５号公報 Further, as this type of caster, a caster with a brake device is manufactured and used for various applications such as a carriage (see, for example, Patent Document 1 below). This type of brake device is usually configured such that the brake member is swingably mounted and the brake member is pressed against the outer periphery of the tire portion by the urging force of the brake spring or the brake operation force of the user. Is done.
Japanese Utility Model Publication No. 55-16725

車輪のタイヤ部は、合成ゴム或いは天然ゴムにより成形される部材であるため、必然的に長期間の使用に伴い、その外周部つまり接地面に摩耗が生じるところ、通常のキャスターのタイヤ部の外周は平滑面で形成され、溝などは形成されていないため、タイヤ部の外周面が摩耗したとしても、使用者は外観的にその摩耗を認識することができにくい。また、自動車のように走行距離計が装着される台車などはないため、走行距離からキャスターのタイヤ部の摩耗を把握することも不可能である。   Since the tire part of the wheel is a member molded from synthetic rubber or natural rubber, the outer periphery of the wheel part, that is, the ground contact surface is inevitably worn with long-term use. Is formed with a smooth surface and no grooves or the like, so even if the outer peripheral surface of the tire portion is worn, it is difficult for the user to recognize the wear in appearance. Further, since there is no trolley equipped with an odometer like an automobile, it is impossible to grasp the wear of the tire portion of the caster from the mileage.

一方、キャスターのブレーキ装置は、通常、摩耗を生じる前の状態のタイヤ部の外径に合わせて、そのブレーキ部材が調整されている。このため、タイヤ部が摩耗すると、タイヤ部へのブレーキ部材の押圧力が低下し、ブレーキ装置の制動力がタイヤ部の摩耗に応じて低下してくる。   On the other hand, in the brake device of a caster, the brake member is usually adjusted in accordance with the outer diameter of the tire portion in a state before wear occurs. For this reason, when the tire portion wears, the pressing force of the brake member on the tire portion decreases, and the braking force of the brake device decreases according to the wear of the tire portion.

しかしながら、この種のブレーキ付きキャスターを取り付けた台車等を管理する管理者などは、キャスターのタイヤ部の摩耗をその外観から認識できにくいため、ブレーキ装置の調整を必要な時期に行なうことができず、ブレーキ力が不足したまま使用されやすいという不具合があった。   However, managers who manage trolleys equipped with this type of caster with brake cannot recognize the wear of the caster's tire part from its appearance, so it is not possible to adjust the brake device when necessary. There was a problem that it was easy to use with insufficient braking force.

本発明は、上述の課題を解決するものであり、タイヤ部の摩耗をその外観から直に認識することができ、ブレーキ力の調整時期の把握などに役立てることができるキャスターを提供することを目的とする。   The present invention solves the above-described problems, and an object thereof is to provide a caster that can directly recognize the wear of a tire portion from its appearance and can be used for grasping the adjustment time of a braking force. And

本発明に係るキャスターは、二叉状に形成されたフォークの下部に車輪が回転自在に軸支され、該車輪はホイールの外周部にタイヤ部が取着されて形成され、該タイヤ部の外周部にブレーキ部材を押し付けてブレーキをかけるブレーキ装置が設けられたキャスターにおいて、該車輪のタイヤ部の内部に、該タイヤ部とは相違した色に着色されたマーク部材が埋設され、キャスターの使用により該タイヤ部の外周部が摩耗したとき、該マーク部材の一部が該タイヤ部の外周に露出することを特徴とする。   In the caster according to the present invention, a wheel is rotatably supported at a lower portion of a fork formed in a bifurcated shape, and the wheel is formed by attaching a tire portion to an outer peripheral portion of the wheel. In a caster provided with a brake device that applies a brake by pressing a brake member on the part, a mark member colored in a color different from the tire part is embedded in the tire part of the wheel, and the caster is used. When the outer peripheral portion of the tire portion is worn, a part of the mark member is exposed on the outer periphery of the tire portion.

ここで、上記マーク部材は、車輪のタイヤ部を型成形する際、成形型内にインサートとして配置し、タイヤ部の成形時にインサート成形されるように構成することができる。   Here, the said mark member can be comprised so that it may arrange | position as an insert in a shaping | molding die, when a tire part of a wheel is shape-molded, and may be insert-molded at the time of shaping | molding of a tire part.

また、上記マーク部材は、三角形断面を有する形状にゴム状弾性体を材料として成形され、タイヤ部内において該マーク部材がその三角形断面の鋭角部を該タイヤ部の外周方向に向けて配設される構成とすることができる。   The mark member is formed into a shape having a triangular cross section using a rubber-like elastic body as a material, and the mark member is disposed in the tire portion with an acute angle portion of the triangular cross section directed toward the outer peripheral direction of the tire portion. It can be configured.

上記構成のキャスターによれば、台車などの移動物に使用され、使用に伴ってタイヤ部の外周部が摩耗した場合、マーク部材の一部が摩耗ラインなどとしてタイヤ部の外周部に現れる。タイヤ部の外周部にブレーキ部材を押し付けてブレーキをかけるブレーキ装置を備えたキャスターでは、タイヤ部の外周部が摩耗すると、ブレーキの利きが悪化するが、タイヤ部の外周部に摩耗ラインなどが現れると、台車などを管理する管理者は、この摩耗ラインを視認して、ブレーキ装置の調整の必要性を容易に認識することができる。このため、使用者や管理者はキャスターのブレーキ装置の調整時期、或いは車輪の交換時期やキャスター自体の交換時期を、容易に把握して、迅速に対応することができる。   According to the caster of the said structure, when it uses for moving objects, such as a trolley | bogie, and the outer peripheral part of a tire part wears with use, some mark members will appear on the outer peripheral part of a tire part as a wear line. In a caster equipped with a brake device that applies a brake by pressing a brake member against the outer periphery of the tire part, wear of the outer peripheral part of the tire part deteriorates the braking effectiveness, but a wear line appears on the outer peripheral part of the tire part. Then, the manager who manages the cart can visually recognize the wear line and easily recognize the necessity of adjusting the brake device. For this reason, the user or the administrator can easily grasp the adjustment time of the brake device of the caster, the replacement time of the wheel or the replacement time of the caster itself, and can respond quickly.

また、三角形断面を有する形状にマーク部材を形成し、タイヤ部内においてマーク部材がその三角形断面の鋭角部をタイヤ部の外周方向に向けて配設する構成とすれば、タイヤ部の摩耗が進むに従い摩耗ラインの太さが太く現れるため、その摩耗ラインの太さからタイヤ部の摩耗の進行状態を容易に把握することができる。   Further, if the mark member is formed in a shape having a triangular cross section, and the mark member is disposed in the tire portion with the acute angle portion of the triangular cross section directed toward the outer peripheral direction of the tire portion, the wear of the tire portion progresses. Since the thickness of the wear line appears thick, it is possible to easily grasp the progress of wear of the tire portion from the thickness of the wear line.

以下、本発明の一実施形態を図面に基づいて説明する。図１はキャスターの部分断面付き右側面図を示し、図２はその平面図を、図３はその車輪３の部分断面付き背面図を示している。このキャスター１は、概略的には、二叉形状に形成されたフォーク２の下部に、車輪３が車軸７を介して回転自在に軸支され、ブレーキ装置のブレーキ部材１０がフォーク２の上部に取り付けられて構成される。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 shows a right side view of the caster with a partial cross section, FIG. 2 shows a plan view thereof, and FIG. 3 shows a rear view of the wheel 3 with a partial cross section. In general, the caster 1 has a wheel 3 rotatably supported on a lower part of a fork 2 formed in a bifurcated shape via an axle 7, and a brake member 10 of a brake device is provided on an upper part of the fork 2. Installed and configured.

車輪３のホイール４の中央にハブが形成され、そのハブにころがり軸受８が取着され、ころがり軸受８内に車軸７が挿通される。車軸７はころがり軸受８の内輪に嵌着され、車輪３は、車軸７を軸に回転自在に支持される。車軸７の両端部は、頭部付きのボルト状に形成され、フォーク２の下部に設けた孔に、ボルト状の車軸７を挿通し、車軸７の先端にナットを締付けることにより、車軸７の両端部がフォーク２に対し固定される。   A hub is formed at the center of the wheel 4 of the wheel 3, a rolling bearing 8 is attached to the hub, and the axle 7 is inserted into the rolling bearing 8. The axle 7 is fitted to the inner ring of the rolling bearing 8, and the wheel 3 is supported rotatably about the axle 7. Both ends of the axle 7 are formed in a bolt shape with a head, and the bolt-like axle 7 is inserted into a hole provided in the lower portion of the fork 2, and a nut is fastened to the tip of the axle 7. Both ends are fixed to the fork 2.

車輪３は、基本的に、ホイール４の外周部にソリッドで円環状のタイヤ部５を成形して構成される。タイヤ部５は、SBR（スチレンブタジエンゴム）、BR（ブタジエンゴム）、NR（天然ゴム）などの高分子弾性体を材料として、ホイール４の外周部に円環状に型成形されるが、この際、別に予め成形されたマーク部材６がインサートとしてタイヤ部５内に埋設されるように、インサート成形される。   The wheel 3 is basically configured by forming a solid and annular tire portion 5 on the outer peripheral portion of the wheel 4. The tire portion 5 is molded in an annular shape around the outer periphery of the wheel 4 using a polymer elastic body such as SBR (styrene butadiene rubber), BR (butadiene rubber), or NR (natural rubber) as a material. In addition, insert molding is performed such that a separately molded mark member 6 is embedded in the tire portion 5 as an insert.

マーク部材６は、図１，図３に示すように、略三角柱状に形成され、三角柱の高さ方向（厚さ方向）が車軸７の軸方向（タイヤ部の幅方向）に向くようにタイヤ部５内に配置される。また、マーク部材６の平面三角形形状は略二等辺三角形に形成され、二等辺三角形の尖頭部の鋭角先端がタイヤ部５の外周部側を向くように、マーク部材６はタイヤ部５内に配置される。   As shown in FIGS. 1 and 3, the mark member 6 is formed in a substantially triangular prism shape, and the height of the triangular prism (thickness direction) is oriented in the axial direction of the axle 7 (the width direction of the tire portion). Arranged in the part 5. Further, the planar triangular shape of the mark member 6 is formed in an approximately isosceles triangle, and the mark member 6 is placed in the tire portion 5 so that the sharp tip of the pointed portion of the isosceles triangle faces the outer peripheral portion side of the tire portion 5. Be placed.

さらに、このマーク部材６は、製造時、タイヤ部５が成形された際、完全にその中に埋設され外観に現れない状態に配設されるが、そのマーク部材６の鋭角先端の埋設厚さｔ（図１、図３におけるマーク部材６の鋭角先端からタイヤ部５の外周面までの長さ）は、キャスターの使用に伴って、タイヤ部５がブレーキ調整を必要とする程度に摩耗したとき、マーク部材６の鋭角先端が露出する程度に設定される。   Further, when the tire portion 5 is molded, the mark member 6 is completely embedded in the tire member 5 so as not to appear in the appearance. The mark member 6 has an embedded thickness at the acute angle tip. t (the length from the sharp tip of the mark member 6 to the outer peripheral surface of the tire portion 5 in FIGS. 1 and 3) when the tire portion 5 is worn to the extent that it is necessary to adjust the brake as the caster is used. The sharp end of the mark member 6 is set to be exposed.

マーク部材６の色は、タイヤ部５が黒色の場合、例えば白色とするように、タイヤ部５の色とは明かに相違した色で成形される。タイヤ部５とマーク部材６とは、色のみ相違した同じ高分子弾性体材料を用いて成形することができ、この場合、使用時に荷重がかかった際、両者は同様に弾性変形するため、タイヤ部５はマーク部材を埋設しない通常のタイヤ部と全く同様に動作する。   When the tire portion 5 is black, the mark member 6 is molded in a color that is clearly different from the color of the tire portion 5, for example, white. The tire part 5 and the mark member 6 can be molded using the same polymer elastic material that is different only in color. In this case, when a load is applied during use, both of them are similarly elastically deformed. The portion 5 operates in the same manner as a normal tire portion in which no mark member is embedded.

ブレーキ装置は、フォーク２の上前部に取り付けられたブレーキ取付部９の前部に、軸９ａを介してブレーキ部材１０を揺動可能に軸支し、ブレーキ部材１０の下部の押圧部１０ａによりタイヤ部５の外周面を押圧するように構成される。ブレーキ取付部９の下側に戻し板ばね１１が取り付けられ、戻し板ばね１１の先端はブレーキ部材１０の下側に固定され、ブレーキ部材１０はこの戻し板ばね１１により上方に押し上げる方向つまりブレーキを解除する方向に付勢される。   The brake device pivotally supports a brake member 10 via a shaft 9 a on a front portion of a brake attachment portion 9 attached to the upper front portion of the fork 2, and is pressed by a pressing portion 10 a below the brake member 10. It is comprised so that the outer peripheral surface of the tire part 5 may be pressed. A return leaf spring 11 is attached to the lower side of the brake attachment portion 9, and the tip of the return leaf spring 11 is fixed to the lower side of the brake member 10. It is energized in the direction to release.

ブレーキ取付部９の軸９ａの真上に、係止部９ｂが形成され、ブレーキ部材１０の前端を押し下げた際、この係止部９ｂが係止されてブレーキ部材１０をブレーキ状態に保持する係止凹部がブレーキ部材１０の下面に形成され、ブレーキ部材１０を下側に押し下げるように回動させたとき、その下端部がタイヤ部５の外周面を押圧し、係止凹部がブレーキ取付部９の係止部９ｂに係止され、ブレーキ状態となる。   A locking portion 9b is formed directly above the shaft 9a of the brake mounting portion 9, and when the front end of the brake member 10 is pushed down, the locking portion 9b is locked to hold the brake member 10 in a brake state. A stop recess is formed on the lower surface of the brake member 10 and when the brake member 10 is rotated so as to push down, the lower end thereof presses the outer peripheral surface of the tire portion 5, and the locking recess is the brake mounting portion 9. Is engaged with the engagement portion 9b, and the brake state is established.

なお、上記キャスター１は、自在キャスターであるが、旋回軸と固定座部は図示を省略しており、図２の平面図に示すように、フォーク２の上部平面部に旋回軸孔が穿設され、この孔にころがり軸受８を介して図示しない旋回軸が取着される。そして、フォーク２の上部平面部に旋回軸を介して固定座部が回転自在に取り付けられ、これにより、キャスター１は自在に旋回可能な自在キャスターとなる。一方、旋回軸を取り付けることなく、フォーク２の上部平面部に固定座部を固定すれば、固定キャスターとすることもできる。   Although the caster 1 is a free caster, the swivel shaft and the fixed seat are not shown, and a swivel shaft hole is formed in the upper flat portion of the fork 2 as shown in the plan view of FIG. Then, a turning shaft (not shown) is attached to the hole via the rolling bearing 8. And a fixed seat part is rotatably attached to the upper plane part of the fork 2 via a turning shaft, whereby the caster 1 becomes a freely caster that can turn freely. On the other hand, if a fixed seat part is fixed to the upper flat part of the fork 2 without attaching a turning shaft, a fixed caster can be obtained.

次に、上記構成のブレーキ装置付きキャスターの動作を説明する。このキャスターは、そのフォーク２の上部平面部が、台車などの移動物の底部に、旋回軸を介して取り付けられ、自在キャスターとして、或いは固定座部として固定されて固定キャスターとして使用される。   Next, the operation of the caster with a brake device having the above configuration will be described. This caster is used as a fixed caster, with the upper flat portion of the fork 2 attached to the bottom of a moving object such as a carriage via a turning shaft, and fixed as a free caster or a fixed seat.

台車などの移動物の使用に伴って、タイヤ部５の外周部が摩耗するが、そのタイヤ部５の摩耗が厚さｔ（図１、図３）を超えた場合、マーク部材６の鋭角先端が摩耗ラインＭとして、図４のように、タイヤ部５の外周部に現れる。このため、台車などの使用者或いは管理者は、この摩耗ラインＭを視認した時点で、タイヤ部５の摩耗を明確に把握し認識することができる。   With the use of a moving object such as a carriage, the outer peripheral portion of the tire portion 5 is worn, but when the wear of the tire portion 5 exceeds the thickness t (FIGS. 1 and 3), the sharp tip of the mark member 6 Appears as a wear line M on the outer peripheral portion of the tire portion 5 as shown in FIG. For this reason, a user such as a carriage or a manager can clearly grasp and recognize the wear of the tire portion 5 when the wear line M is visually recognized.

タイヤ部５の外周部にブレーキ部材１０を押し付けてブレーキをかけるブレーキ装置付きキャスターでは、タイヤ部５の外周部が摩耗すると、ブレーキの利きが悪化するが、タイヤ部５の外周部に摩耗ラインＭが現れると、台車などを管理する使用者或いは管理者は、この摩耗ラインＭを視認して、ブレーキ装置の調整の必要性を把握することができる。このため、タイヤ部５に摩耗ラインＭが現われた場合には、キャスター１のブレーキ取付部９やブレーキ部材１０を調整して、ブレーキのききを遅滞なく調整することができる。また、車輪３の交換時期やキャスター自体の交換時期を、このタイヤ部５の摩耗ラインＭの露出によって、容易に認識することができる。   In a caster with a brake device that applies a brake by pressing the brake member 10 against the outer peripheral portion of the tire portion 5, when the outer peripheral portion of the tire portion 5 is worn out, the workability of the brake is deteriorated. When this appears, the user or administrator who manages the carriage or the like can visually recognize the wear line M and grasp the necessity of adjusting the brake device. For this reason, when the wear line M appears in the tire part 5, the brake attachment part 9 and the brake member 10 of the caster 1 can be adjusted, and the brake clearance can be adjusted without delay. Further, the replacement time of the wheel 3 and the replacement time of the caster itself can be easily recognized by the exposure of the wear line M of the tire portion 5.

さらに、マーク部材６は、図１のように、三角形断面を有する形状に形成され、タイヤ部５内においてマーク部材６がその三角形断面の鋭角部をタイヤ部５の外周方向に向けて配置されるため、タイヤ部５の摩耗が進むに従い摩耗ラインＭの太さが太く現れる。このため、タイヤ部５の外周部に摩耗ラインＭが現れたとき、その摩耗ラインＭの太さからタイヤ部５の摩耗状態の進み具合を容易に把握することができる。   Further, as shown in FIG. 1, the mark member 6 is formed in a shape having a triangular cross section, and the mark member 6 is disposed in the tire portion 5 with the acute angle portion of the triangular cross section facing the outer peripheral direction of the tire portion 5. Therefore, the thickness of the wear line M appears thicker as the tire part 5 wears. For this reason, when the wear line M appears on the outer peripheral portion of the tire portion 5, it is possible to easily grasp the progress of the wear state of the tire portion 5 from the thickness of the wear line M.

図５〜図７は、他の実施形態のキャスターを示している。この実施形態のキャスターの車輪１３のタイヤ部１５には、マーク部材１６が埋設されるが、このマーク部材１６は、円弧状であり、タイヤ部１５の円周方向に沿って配設される。キャスターの基本的構成は、上記実施形態と同様であり、上記と同じ部材については、上記と同じ符号を図５〜図７に付して、その説明を省略する。   5-7 has shown the caster of other embodiment. A mark member 16 is embedded in the tire portion 15 of the wheel 13 of the caster according to this embodiment. The mark member 16 has an arc shape and is disposed along the circumferential direction of the tire portion 15. The basic structure of a caster is the same as that of the said embodiment, About the same member as the above, the same code | symbol as above is attached | subjected to FIGS. 5-7, and the description is abbreviate | omitted.

図５〜図７に示すように、車輪１３は、ホイール４の外周部にソリッドで円環状のタイヤ部１５を取着して構成される。タイヤ部１５は、SBR（スチレンブタジエンゴム）、BR（ブタジエンゴム）、NR（天然ゴム）などの高分子弾性体を材料として、ホイール４の外周部に円環状に型成形され、この際、別に予め成形されたマーク部材１６がインサートとしてタイヤ部１５内に埋設されるように、インサート成形される。   As shown in FIGS. 5 to 7, the wheel 13 is configured by attaching a solid and annular tire portion 15 to the outer peripheral portion of the wheel 4. The tire portion 15 is molded in an annular shape around the outer periphery of the wheel 4 using a polymer elastic body such as SBR (styrene butadiene rubber), BR (butadiene rubber), or NR (natural rubber). Insert molding is performed so that the mark member 16 molded in advance is embedded in the tire portion 15 as an insert.

マーク部材１６は、図５，図６に示すように、横断面を二等辺三角形とする円弧状三角柱として形成され、車輪１３の全周部または円周部分の一部分のタイヤ部１５内に配設される。また、マーク部材１６は、その横断面の二等辺三角形の尖頭部（鋭角先端）が、車輪１３のラジアル方向（外周方向）に向けてタイヤ部１５内に配置される。   As shown in FIGS. 5 and 6, the mark member 16 is formed as an arc-shaped triangular prism having an isosceles triangle in cross section, and is disposed in the tire portion 15 in the entire circumferential portion or a part of the circumferential portion of the wheel 13. Is done. Further, the mark member 16 has an isosceles triangular point (acute angle tip) having a transverse cross section disposed in the tire portion 15 in a radial direction (peripheral direction) of the wheel 13.

つまり、図６に示すように、マーク部材１６の横断面二等辺三角形の底辺部がホイール４の外周部に沿って配置され、二等辺三角形の尖頭部の鋭角先端が、タイヤ部１５の外周部側を向くように、マーク部材１６はタイヤ部１５内に配置される。なお、円環状のタイヤ部１５内にその円周方向に沿って埋設されるマーク部材１６は、タイヤ部１５の全周に埋設することもできるが、タイヤ部１５の周囲の一部分のみに埋設することもできる。   That is, as shown in FIG. 6, the base of the isosceles cross section of the mark member 16 is arranged along the outer periphery of the wheel 4, and the sharp tip of the pointed head of the isosceles triangle is the outer periphery of the tire portion 15. The mark member 16 is disposed in the tire portion 15 so as to face the portion side. The mark member 16 embedded along the circumferential direction in the annular tire portion 15 can be embedded in the entire circumference of the tire portion 15, but is embedded only in a part around the tire portion 15. You can also

このマーク部材１６は、製造時、タイヤ部１５が成形された際、完全にその中に埋設され外観に現れない状態に配設されるが、そのマーク部材１６の鋭角先端の埋設厚さｔ（図１、図３）、つまりマーク部材１６の鋭角先端からタイヤ部１５の外周面までの長さｔは、キャスターの使用に伴って、タイヤ部１５がブレーキ調整を必要とする程度に摩耗したとき、マーク部材１６の鋭角先端が露出する程度に設定される。   When the tire portion 15 is molded at the time of manufacture, the mark member 16 is completely embedded in the tire member 15 so that the mark member 16 does not appear on the appearance. The mark member 16 has an embedded thickness t ( 1, 3), that is, the length t from the acute angle tip of the mark member 16 to the outer peripheral surface of the tire portion 15 when the tire portion 15 is worn to the extent that the brake adjustment is required with the use of casters. The sharp end of the mark member 16 is set to be exposed.

マーク部材１６の色は、タイヤ部１５が黒色の場合、例えば白色とするように、タイヤ部１５の色とは明かに相違した色で成形される。タイヤ部１５とマーク部材１６とは、色のみ相違した同じ高分子弾性体材料を用いて成形することができる。   When the tire portion 15 is black, the mark member 16 is molded in a color that is clearly different from the color of the tire portion 15, for example, white. The tire portion 15 and the mark member 16 can be molded using the same polymer elastic material that differs only in color.

このキャスターは、上記実施形態の場合と同様に、台車などの移動物に取り付けて使用されるが、台車などが長期間使用されると、タイヤ部１５の外周部が摩耗してくる。そして、そのタイヤ部１５の摩耗が図５、図６の厚さｔを超えた場合、マーク部材１６の鋭角先端が摩耗ラインＭとして、図７のように、タイヤ部１５の外周部に現れる。このため、台車などの使用者或いは管理者は、この摩耗ラインＭを視認した時点で、タイヤ部１５の摩耗を明確に把握し認識することができる。   The caster is used by being attached to a moving object such as a carriage as in the case of the above embodiment. However, when the carriage is used for a long period of time, the outer peripheral portion of the tire portion 15 is worn. When the wear of the tire portion 15 exceeds the thickness t of FIGS. 5 and 6, the acute angle tip of the mark member 16 appears as an wear line M on the outer peripheral portion of the tire portion 15 as shown in FIG. 7. For this reason, a user such as a carriage or a manager can clearly grasp and recognize the wear of the tire portion 15 at the time when the wear line M is visually recognized.

また、タイヤ部１５内のマーク部材１６がその三角形断面の鋭角部をタイヤ部１５の外周方向に向けて配設されるから、タイヤ部１５の摩耗が進むに従い摩耗ラインＭの太さは、太く現れる。したがって、その摩耗ラインＭの太さからタイヤ部１５の摩耗の進行状態を容易に把握することができる。   Further, since the mark member 16 in the tire portion 15 is disposed with the acute angle portion of the triangular cross section directed toward the outer peripheral direction of the tire portion 15, the wear line M becomes thicker as the tire portion 15 wears. appear. Therefore, it is possible to easily grasp the progress of wear of the tire portion 15 from the thickness of the wear line M.

このように、本発明のキャスターによれば、使用に伴ってタイヤ部の外周部が摩耗した場合、マーク部材の一部が摩耗ラインなどとしてタイヤ部の外周部に現れる。タイヤ部の外周部にブレーキ部材を押し付けてブレーキをかけるブレーキ装置を備えたキャスターでは、タイヤ部の外周部が摩耗すると、ブレーキのききが悪化するが、タイヤ部の外周部に摩耗ラインなどが現れると、台車などを管理する管理者は、この摩耗ラインを視認して、ブレーキ装置の調整の必要性を容易に認識することができる。このため、使用者や管理者はキャスターのブレーキ装置の調整時期、或いは車輪の交換時期やキャスター自体の交換時期を、容易に把握して、迅速に対応することができる。   Thus, according to the caster of the present invention, when the outer peripheral portion of the tire portion is worn with use, a part of the mark member appears on the outer peripheral portion of the tire portion as a wear line or the like. In a caster equipped with a brake device that applies a brake by pressing a brake member against the outer periphery of the tire part, wear of the outer periphery of the tire part deteriorates the brake clearance, but a wear line appears on the outer periphery of the tire part. Then, the manager who manages the cart can visually recognize the wear line and easily recognize the necessity of adjusting the brake device. For this reason, the user or the administrator can easily grasp the adjustment time of the brake device of the caster, the replacement time of the wheel or the replacement time of the caster itself, and can respond quickly.

本発明の一実施形態を示すキャスターの部分断面付き右側面図である。It is a right view with a partial section of the caster which shows one embodiment of the present invention. 同キャスターの平面図である。It is a top view of the caster. 同キャスターの車輪の断面を含む背面図である。It is a rear view including the cross section of the wheel of the caster. タイヤ部が摩耗した状態のキャスターの背面図である。It is a rear view of a caster in the state where a tire part was worn. 他の実施形態を示すキャスターの部分断面付き右側面図である。It is a right view with a partial cross section of the caster which shows other embodiment. 同キャスターの車輪の断面を含む背面図である。It is a rear view including the cross section of the wheel of the caster. タイヤ部が摩耗した状態の同キャスターの背面図である。It is a rear view of the caster in a state where a tire portion is worn.

符号の説明Explanation of symbols

１ キャスター
２ フォーク
３ 車輪
４ ホイール
５ タイヤ部
６ マーク部材
７ 車軸
９ ブレーキ取付部
１０ ブレーキ部材
Ｍ 摩耗ライン DESCRIPTION OF SYMBOLS 1 Caster 2 Fork 3 Wheel 4 Wheel 5 Tire part 6 Mark member 7 Axle 9 Brake attachment part 10 Brake member M Wear line

Claims (3)

二叉状に形成されたフォークの下部に車輪が回転自在に軸支され、該車輪はホイールの外周部にタイヤ部が取着されて形成され、該タイヤ部の外周部にブレーキ部材を押し付けてブレーキをかけるブレーキ装置付きのキャスターにおいて、
該車輪のタイヤ部の内部に、該タイヤ部とは相違した色に着色されたマーク部材が埋設され、キャスターの使用により該タイヤ部の外周部が摩耗したとき、該マーク部材の一部が該タイヤ部の外周に露出することを特徴とするキャスター。 A wheel is rotatably supported at the lower part of a fork formed in a bifurcated shape, and the wheel is formed by attaching a tire part to an outer peripheral part of the wheel, and a brake member is pressed against the outer peripheral part of the tire part. In casters with brake devices that apply brakes,
A mark member colored in a color different from that of the tire portion is embedded in the tire portion of the wheel, and when the outer peripheral portion of the tire portion is worn by use of a caster, a part of the mark member is A caster that is exposed on the outer periphery of the tire portion. 前記マーク部材は、前記車輪のタイヤ部を型成形する際、成形型内にインサートとして配置され、該タイヤ部の成形時にインサート成形されることを特徴とする請求項１記載のキャスター。   2. The caster according to claim 1, wherein the mark member is disposed as an insert in a molding die when the tire portion of the wheel is molded, and is insert-molded when the tire portion is molded. 前記マーク部材は、三角形断面を有する形状に高分子弾性体を材料として成形され、前記タイヤ部内において該マーク部材が該三角形断面の鋭角部を該タイヤ部の外周方向に向けて配設されたことを特徴とする請求項２記載のキャスター。



The mark member is formed using a polymer elastic body as a material having a triangular cross section, and the mark member is disposed in the tire portion with an acute angle portion of the triangular cross section directed in an outer peripheral direction of the tire portion. The caster according to claim 2.



JP2007139532A 2007-05-25 2007-05-25 Caster Withdrawn JP2008290628A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007139532A JP2008290628A (en) 2007-05-25 2007-05-25 Caster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007139532A JP2008290628A (en) 2007-05-25 2007-05-25 Caster

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011093369A (en) * 2009-10-28 2011-05-12 Aron Kasei Co Ltd Wheel
JP2012218628A (en) * 2011-04-12 2012-11-12 Kowa Seisakusho:Kk Wheel abrasion detecting device and walk assisting unit having the same
CN104354477A (en) * 2014-09-24 2015-02-18 合肥海闻自动化设备有限公司 Movable nozzle system for tire digital printer
CN110167763A (en) * 2016-11-11 2019-08-23 株式会社南星 Castor structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011093369A (en) * 2009-10-28 2011-05-12 Aron Kasei Co Ltd Wheel
JP2012218628A (en) * 2011-04-12 2012-11-12 Kowa Seisakusho:Kk Wheel abrasion detecting device and walk assisting unit having the same
CN104354477A (en) * 2014-09-24 2015-02-18 合肥海闻自动化设备有限公司 Movable nozzle system for tire digital printer
CN110167763A (en) * 2016-11-11 2019-08-23 株式会社南星 Castor structure

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