JP4453709B2 - Casters - Google Patents

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JP4453709B2
JP4453709B2 JP2007056136A JP2007056136A JP4453709B2 JP 4453709 B2 JP4453709 B2 JP 4453709B2 JP 2007056136 A JP2007056136 A JP 2007056136A JP 2007056136 A JP2007056136 A JP 2007056136A JP 4453709 B2 JP4453709 B2 JP 4453709B2
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caster
cover
wheels
wheel
ring
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JP2008213737A (en
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保之 棚橋
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東海キャスター株式会社
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Description

本発明は、キャスタに係り、特に、双輪のキャスタに関するものである。   The present invention relates to a caster, and more particularly to a twin-wheel caster.

一般に、双輪タイプのキャスタは、キャスタ本体両側に一対の車輪が車軸を介して回転可能に支持されて構成される。キャスタ本体には、車軸から偏心した位置に旋回軸が回転可能に支持され被取付体に固定されるようになっている。このようなキャスタでは、車輪間にごみやホコリ、繊維屑や毛などを巻き込みやすい。このため、従来、防塵機構を備えたキャスタが提案されている。防塵機構を備えた従来のキャスタは、図7に示すように、キャスタ本体2に車軸3を介して車輪4A、4Bが回転可能に支持され、進行方向前方側に旋回軸5が回転自在に取り付けられる。キャスタ本体2の両側には、ラッパ状の覆い6の基端部をスナップリング6Aにより取り付け、車輪4A、4Bの内側には、ラッパ状覆い6を覆う環状の内側覆い7を、車輪4A、4Bの外側には、椀状の外側覆い8をそれぞれスナップリング7A、8Aにより取り付けるようにしている(例えば、特許文献1参照。)。
実公昭39−13013号公報(第1頁、第2図)
In general, a twin-wheel type caster is configured such that a pair of wheels are rotatably supported on both sides of a caster body via an axle. The swivel shaft is rotatably supported on the caster body at a position eccentric from the axle, and is fixed to the mounted body. In such a caster, dust, dust, fiber scraps and hairs are easily caught between the wheels. For this reason, casters having a dustproof mechanism have been proposed. As shown in FIG. 7, a conventional caster equipped with a dustproof mechanism has wheels 4A and 4B rotatably supported on a caster body 2 via an axle 3, and a swivel shaft 5 is rotatably mounted on the front side in the traveling direction. It is done. A base end portion of a trumpet-shaped cover 6 is attached to both sides of the caster body 2 by a snap ring 6A, and an annular inner cover 7 for covering the trumpet-shaped cover 6 is provided on the inner side of the wheels 4A, 4B. On the outer side, a hook-shaped outer cover 8 is attached by snap rings 7A and 8A (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 39-13013 (first page, FIG. 2)

しかしながら、上記従来のキャスタでは、ラッパ状覆い6は車輪4A、4Bとキャスタ本体2との形状に合わせて、また、内側覆い7は車輪4A、4Bの形状に合わせてそれぞれ成型しなければならず、スナップリングも取り付け部の径に合致させなければならない。このため、車輪やキャスタ本体に合致させて多種の覆いやスナップリングを製造しなければならず管理に手間がかかるという問題がある。また、部品点数が多くなりコストアップを招くという問題がある。さらに、組立時にラッパ状覆いと内側覆いとを組み付けなければならず、取り付け作業に手間がかかるという問題がある。   However, in the conventional caster, the trumpet-shaped cover 6 must be molded according to the shapes of the wheels 4A, 4B and the caster body 2, and the inner cover 7 must be molded according to the shapes of the wheels 4A, 4B. Also, the snap ring must match the diameter of the mounting part. For this reason, it is necessary to manufacture various types of covers and snap rings in accordance with the wheels and the caster body, and there is a problem that it takes time and effort for management. In addition, there is a problem that the number of parts increases and the cost increases. Furthermore, there is a problem that the trumpet-shaped cover and the inner cover must be assembled at the time of assembling, and the installation work is troublesome.

本発明は、上記課題を解決するためになされたもので、簡素な構成で、汎用性が高く、取り付けが容易で外観のデザインを損ねることのない防塵構造を備えたキャスタを提供することを目的とするものである。   The present invention has been made in order to solve the above-described problems, and has an object to provide a caster having a dustproof structure with a simple configuration, high versatility, easy installation, and without damaging the appearance design. It is what.

本発明の請求項1に係るキャスタは、キャスタ本体に車輪が車軸を介して回転可能に支持されたキャスタにおいて、キャスタ本体には、車輪のキャスタ本体と向き合う側の面を覆う防塵カバーを固着し、車輪のキャスタ本体側内側面の外周部には、内周縁が防塵カバーの外周側端縁に臨みこの外周側端縁との間に異物の進入を阻止しこの外周側端縁と干渉しない程度の狭隘な隙間を形成する輪形部材を固着したものである。 The caster according to claim 1 of the present invention is a caster in which a wheel is rotatably supported on an caster body via an axle, and a dustproof cover that covers a surface of the wheel facing the caster body is fixed to the caster body. The outer peripheral part of the inner side surface of the caster body side of the wheel is such that the inner peripheral edge faces the outer peripheral edge of the dustproof cover and prevents foreign matter from entering between and interfering with the outer peripheral edge. A ring-shaped member that forms a narrow gap is fixed.

本発明の請求項1に係るキャスタでは、キャスタ本体に車輪が車軸を介して回転可能に支持されたキャスタにおいて、キャスタ本体には、車輪のキャスタ本体と向き合う側の面を覆う防塵カバーを固着し、車輪のキャスタ本体側内側面の外周部には、内周縁が防塵カバーの外周側端縁に臨みこの外周側端縁との間に異物の進入を阻止しこの外周側端縁と干渉しない程度の狭隘な隙間を形成する輪形部材を固着したことにより、防塵カバーと輪形部材との隙間を狭くすることができるので、回転側に塵や埃が入るの阻止する確実性が高まり防塵性能が向上する。また、組み付け前に防塵カバーを予めキャスター本体に固着することができ、キャスタ組立時に防塵カバーの取り付け作業が省略される。既存のキャスタに防塵カバーを後から取り付けることができ、しかも、外観のデザインを損ねることがない。さらに、輪形部材の内周縁を防塵カバーの外周縁に合致させてカットまたは折曲することにより、設計寸法の異なる多種のキャスタに対応させることができ、汎用性が高くなる。 In the caster according to claim 1 of the present invention, in the caster in which the wheel is rotatably supported by the caster body via the axle, a dust-proof cover that covers a surface of the wheel facing the caster body is fixed to the caster body. The outer peripheral part of the inner side surface of the caster body side of the wheel is such that the inner peripheral edge faces the outer peripheral edge of the dustproof cover and prevents foreign matter from entering between and interfering with the outer peripheral edge. by which is fixed a ring-shaped member to form a narrow gap, it is possible to narrow the gap between the dust cover and the ring-shaped member, reliability is increased dustproof to prevent dust and dirt from entering the rotating side to improve the To do. Further, the dustproof cover can be fixed to the caster body before assembly, and the work of attaching the dustproof cover is omitted when the caster is assembled. A dust-proof cover can be attached later to an existing caster, and the appearance design is not impaired. Further, by cutting or bending the inner peripheral edge of the ring-shaped member so as to match the outer peripheral edge of the dustproof cover, it is possible to cope with various casters having different design dimensions, and the versatility is enhanced.

また、請求項2に係るキャスタは、防塵カバーはキャスタ本体に、輪形部材は車輪にそれぞれ、超音波溶着、接着剤による接着または圧着のうちいずれか1の接合手段により固着されるようにしたものである。 Moreover, those caster according to claim 2, dust cover the caster body, ring-shaped member which is adapted respectively to the wheels, is fixed by any one of the bonding means of the bonding or crimping by ultrasonic welding, adhesive It is.

請求項2に係るキャスタでは、防塵カバーはキャスタ本体に、輪形部材は車輪にそれぞれ、超音波溶着、接着剤による接着または圧着のうちいずれか1の接合手段により固着されるようにしたことにより、キャスタ本体または車輪への取り付け作業が効率化される。 In the caster according to claim 2, the dust-proof cover is fixed to the caster body, and the ring-shaped member is fixed to the wheel by ultrasonic welding, adhesive bonding, or pressure bonding by any one joining means , Installation work to the caster body or wheels is made efficient.

請求項3に係るキャスタは、車輪は、キャスタ本体両側に配設されるとともに、車輪のキャスタ本体側内側面には、外周部とボス部との間に凹陥部が形成され、防塵カバーはこれらボス部と凹陥部とを覆ようにしたものである。 In the caster according to the third aspect, the wheels are disposed on both sides of the caster body, and on the inner surface of the wheel on the caster body side , a recessed portion is formed between the outer peripheral portion and the boss portion. in which it was to try covering the boss portion and the recessed portion.

請求項3に係るキャスタでは、車輪は、キャスタ本体両側に配設されるとともに、車輪のキャスタ本体側内側面には、外周部とボス部との間に凹陥部が形成され、防塵カバーはこれらボス部と凹陥部とを覆ようにしたことにより、防塵カバーの外周縁と輪形部材の内周縁とが干渉しにくくなるので、これらの間の隙間をより狭くすることができ、防塵性能が向上する。 In the caster according to the third aspect, the wheels are disposed on both sides of the caster body, and on the inner surface of the wheel on the caster body side , a recessed portion is formed between the outer peripheral portion and the boss portion. by you as will covering the boss portion and the recessed portion, since the inner peripheral edge of the outer peripheral edge and ring-shaped member of the dust cover is hardly interfere, it is possible to narrow the gap between them, dustproof performance improves.

本発明に係るキャスタは、キャスタ本体に車輪が車軸を介して回転可能に支持されたキャスタであって、キャスタ本体には、車輪のキャスタ本体と向き合う側の面を覆う防塵カバーを固着し、車輪のキャスタ本体側内側面の外周部には、内周縁が防塵カバーの外周側端縁に臨みこの外周側端縁との間に異物の進入を阻止しこの外周側端縁と干渉しない程度の狭隘な隙間を形成する輪形部材を固着したので、キャスタ自体の外観を損なうことなく既成の製品に取り付けることができ、汎用性が向上し、コストダウンを図ることができる。また、組み付け前に予め取り付けることができるので、組み付け作業を効率化することができる。 A caster according to the present invention is a caster in which a wheel is rotatably supported on an caster body via an axle, and a dust-proof cover that covers a surface of the wheel facing the caster body is fixed to the caster body. The outer peripheral portion of the inner surface of the caster body is narrow enough that the inner peripheral edge faces the outer peripheral edge of the dustproof cover and prevents foreign matter from entering the outer peripheral edge and does not interfere with the outer peripheral edge. Since the ring-shaped member that forms a gap is fixed, it can be attached to an existing product without impairing the appearance of the caster itself, improving versatility and reducing costs. Moreover, since it can attach beforehand before an assembly | attachment, an assembly | attachment operation | work can be made efficient.

防塵構造の汎用化と組み付け作業の効率化を図るという目的を、キャスタ本体には、車輪のキャスタ本体と向き合う側の面を覆うラッパ状の防塵カバーを固着し、車輪には、内周縁が防塵カバーの外周側端縁に臨みこの外周側端縁との間に狭隘な隙間を形成する輪形部材を固着したことにより実現した。   For the purpose of generalization of dustproof structure and efficiency of assembly work, a trumpet-shaped dustproof cover covering the surface of the wheel facing the caster body is fixed to the caster body, and the inner periphery of the wheel is dustproof. This is realized by fixing a ring-shaped member that faces the outer peripheral edge of the cover and forms a narrow gap with the outer peripheral edge.

以下、図面に示す実施例により本発明を説明する。図1は、本発明の一実施例に係るキャスタを示す側面図、図2は図1のキャスタを示す縦断面図である。本実施例に係るキャスタ10は、図1および図2に示すように、内部に軸孔11が形成されたキャスタ本体12と、このキャスタ本体12の両側に配置され中心に軸孔13A、14Aが形成された両側車輪13、14と、これら車輪13、14の軸孔13A、14Aとキャスタ本体12の軸孔11に挿通され、両側車輪13、14を支持する車軸15と、キャスタ本体12に車軸15から進行方向前方側に偏心した位置において回動自在に設けられた旋回軸16とを備えている。   Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. FIG. 1 is a side view showing a caster according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view showing the caster of FIG. As shown in FIGS. 1 and 2, the caster 10 according to the present embodiment includes a caster body 12 having a shaft hole 11 formed therein, and shaft holes 13 </ b> A and 14 </ b> A arranged at both sides of the caster body 12. The formed both-side wheels 13, 14, the shaft holes 13 A, 14 A of these wheels 13, 14 and the shaft hole 11 of the caster body 12 are inserted, and the axle 15 that supports the both-side wheels 13, 14 is supported. 15 and a turning shaft 16 provided so as to be rotatable at a position eccentric to the front side in the traveling direction.

車輪13、14の外側面13B、14Bは、軸孔13A、14Aの近傍が内側に凹陥して形成され、これら車輪外側面13B、14Bには、これら外側面13B、14Bを覆う側板17、18が取り外し自在に取り付けられる。凹陥部13C、14Cは内側に後退した面が平坦に形成される。側板17、18は、車輪13、14に対し外側から異物が回転軸部に進入するのを阻止する外側防塵カバーの役割を果たす。   The outer surfaces 13B and 14B of the wheels 13 and 14 are formed in the vicinity of the shaft holes 13A and 14A inwardly, and the wheel outer surfaces 13B and 14B are side plates 17 and 18 that cover the outer surfaces 13B and 14B. Is removably attached. The recessed portions 13C and 14C are formed with flat surfaces that are recessed inward. The side plates 17 and 18 serve as outer dust-proof covers that prevent foreign matter from entering the rotating shaft portion from the outside with respect to the wheels 13 and 14.

車軸15は、軸部20と、この軸部20の一端に形成され軸孔13A、14Aより大径に形成された鍔部21とを有している。軸部20は、両車輪13、14の軸孔13A、14Aとキャスタ本体12の軸孔11とに挿通されるようになっている。この軸部20は長さ寸法が、各軸孔13A、11、14Aを合わせた長さにほぼ合致するようになっている。軸部20の端面には、螺子孔が形成され、螺子孔にワッシャ22を介して螺子止め具19が螺着される。螺子止め具19が螺着されると、車軸15と車輪13、14とが連結され、車軸15はキャスタ本体12の軸孔11に回動自在に支持されるようになっている。このキャスタ10は、螺子止め具19により車軸15が分離すると、各車輪13、14とキャスタ本体12とがそれぞれ分解されるようになっている。キャスタ本体12と各車輪13、14は合成樹脂で成型される。   The axle 15 includes a shaft portion 20 and a flange portion 21 formed at one end of the shaft portion 20 and having a diameter larger than the shaft holes 13A and 14A. The shaft portion 20 is inserted into the shaft holes 13 </ b> A and 14 </ b> A of both wheels 13 and 14 and the shaft hole 11 of the caster body 12. The shaft portion 20 has a length dimension that substantially matches the combined length of the shaft holes 13A, 11, and 14A. A screw hole is formed on the end surface of the shaft portion 20, and a screw stopper 19 is screwed into the screw hole via a washer 22. When the screw stopper 19 is screwed, the axle 15 and the wheels 13 and 14 are connected, and the axle 15 is rotatably supported by the shaft hole 11 of the caster body 12. In the caster 10, when the axle 15 is separated by the screw stopper 19, the wheels 13 and 14 and the caster body 12 are respectively disassembled. The caster body 12 and the wheels 13 and 14 are molded of synthetic resin.

車輪13、14には、内側面に車輪側ボス部13D、14Dと外周環状部13E、14Eとがそれぞれ形成され、これら車輪側ボス部13D、14Dと外周環状部13E、14Eとの間には、凹陥部13F、14Fが形成される。車輪側ボス部13D、14Dはキャスタ本体12側に突出して形成され、キャスタ本体12には、これら車輪側ボス部13D、14Dが嵌入される本体側ボス部23、24が凹陥して形成される。   The wheels 13 and 14 are respectively formed with wheel side boss portions 13D and 14D and outer peripheral annular portions 13E and 14E on the inner surface, and between these wheel side boss portions 13D and 14D and the outer peripheral annular portions 13E and 14E. The recessed portions 13F and 14F are formed. The wheel side boss portions 13D and 14D are formed so as to protrude toward the caster main body 12, and the main body side boss portions 23 and 24 into which the wheel side boss portions 13D and 14D are inserted are recessed in the caster main body 12. .

ところで、キャスタ本体12には、図2および図3に示すように、本体側ボス部23、24に、合成樹脂製の防塵カバー30が超音波溶着により固着される。防塵カバー30は、車輪13、14の内側面に対応した形状に成型される。すなわち、防塵カバー30は、ラッパ状に形成され、図4に示すように、軸孔11より若干大径に形成された孔31を有し本体側ボス部23、24に嵌入される底部32と、この底部32外周から立ち上がり内周が車輪側ボス部13D、14Dより若干大径に形成された筒部33と、この筒部33に連続し、車輪13、14の内側凹陥部13C、14Cにほぼ合致して形成される覆い部34とを備えて形成される。すなわち、覆い部34は、筒部33に連続し拡開して形成される拡開部34Aと、この拡開部34Aに連続し、内側凹陥部13C、14Cの形状に合わせて平坦に形成される平坦部34Bと、この平坦部34Bに連続して折曲して形成された筒部34Cとを備えている。筒部34Cの端縁(外周側端縁)35は、車輪13、14の外周環状部13E、14Eの内側平坦面13G、14Gのなす面より車輪13、14の内側に後退している。防塵カバー30は、車輪13、14のボス部13D、14D外周と内側凹陥部13C、14Cと外周環状部13E、14E内周面とに沿って覆うように延び、これらボス部13D、14D外周と内側凹陥部13C、14Cと外周環状部13E、14E内周面との間で狭隘な空隙S1を形成するようになっている。また、防塵カバー30は、キャスタ10の組立時、車輪13、14との間に所定の空隙が確保され、接触しないようになっている。   Incidentally, as shown in FIGS. 2 and 3, a dust-proof cover 30 made of synthetic resin is fixed to the caster body 12 on the body-side boss portions 23 and 24 by ultrasonic welding. The dust cover 30 is molded into a shape corresponding to the inner side surfaces of the wheels 13 and 14. That is, the dust cover 30 is formed in a trumpet shape, and as shown in FIG. 4, the dust cover 30 has a hole 31 formed with a diameter slightly larger than the shaft hole 11, and a bottom portion 32 fitted into the main body side boss portions 23 and 24. The cylinder 32 has an inner periphery rising from the outer periphery of the bottom 32 and has a slightly larger diameter than the wheel-side bosses 13D and 14D. The cylinder 33 is continuous with the cylinders 33, and the inner recesses 13C and 14C of the wheels 13 and 14 are formed. And a cover portion 34 formed substantially in conformity. That is, the cover part 34 is formed flat in accordance with the shape of the expanded part 34A formed continuously from the cylindrical part 33 and the expanded part 34A, and the inner recessed parts 13C, 14C. A flat portion 34B, and a cylindrical portion 34C formed by bending the flat portion 34B continuously. An end edge (outer peripheral end edge) 35 of the cylindrical portion 34 </ b> C is retracted to the inside of the wheels 13 and 14 from the surface formed by the inner flat surfaces 13 </ b> G and 14 </ b> G of the outer peripheral annular portions 13 </ b> E and 14 </ b> E of the wheels 13 and 14. The dust cover 30 extends so as to cover the outer periphery of the bosses 13D and 14D of the wheels 13 and 14 and the inner recesses 13C and 14C and the inner peripheral surface of the outer peripheral annular parts 13E and 14E, and the outer periphery of the bosses 13D and 14D. A narrow gap S1 is formed between the inner recessed portions 13C and 14C and the outer peripheral annular portions 13E and 14E. In addition, the dust-proof cover 30 has a predetermined space between the wheels 13 and 14 when the caster 10 is assembled, so that the dust-proof cover 30 does not come into contact therewith.

本実施例に係るキャスタ10は、キャスタ本体12に防塵カバー30が固着される一方、車輪外周環状部13E、14Eの内側平坦面13G、14Gには、図4および図5に示すように、輪形部材40が超音波溶着により固着される。輪形部材40は合成樹脂製の薄い板材を円輪状にカットして成型される。輪形部材40の外周縁41は車輪外周環状部13E、14Eの外径より小径に形成され、内周縁42は防塵カバー30の端縁35に臨むとともに、この端縁35との間に狭隘な隙間S2を形成するようになっている。また、内周縁42は、防塵カバー30の端縁35に重ならないようになっている。こうして、輪形部材40は、防塵カバー30の端縁35に臨むとともに端縁35との隙間S2を狭くするようになっている。この隙間S2は、輪形部材40の内周縁42と防塵カバー30の端縁35とが干渉しない程度の狭い空間となっており、塵や毛などの異物が入りにくくなっている。このため、キャスタ10の使用時、防塵カバー30と輪形部材40とにより回転する車輪13、14の内側が覆われ、車輪13、14の内側に異物が進入するのを阻止するようになっている。   In the caster 10 according to the present embodiment, the dustproof cover 30 is fixed to the caster body 12, while the inner flat surfaces 13G and 14G of the wheel outer peripheral annular portions 13E and 14E have a ring shape as shown in FIGS. The member 40 is fixed by ultrasonic welding. The annular member 40 is formed by cutting a thin plate made of synthetic resin into an annular shape. The outer peripheral edge 41 of the ring-shaped member 40 is formed to be smaller in diameter than the outer diameters of the wheel outer peripheral annular portions 13E and 14E, and the inner peripheral edge 42 faces the end edge 35 of the dustproof cover 30, and a narrow gap is formed between this end edge 35 S2 is formed. Further, the inner peripheral edge 42 does not overlap the end edge 35 of the dust cover 30. Thus, the ring-shaped member 40 faces the end edge 35 of the dustproof cover 30 and narrows the gap S2 with the end edge 35. The gap S2 is a narrow space where the inner peripheral edge 42 of the ring-shaped member 40 and the edge 35 of the dust cover 30 do not interfere with each other, and it is difficult for foreign matters such as dust and hair to enter. For this reason, when the caster 10 is used, the inside of the rotating wheels 13 and 14 is covered by the dustproof cover 30 and the ring-shaped member 40, and foreign matter enters the inside of the wheels 13 and 14. .

次に、上記実施例に係るキャスタの作用について説明する。上記実施例に係るキャスタ10は、組立前に予め、防塵カバー30をキャスタ本体12の凹陥した本体側ボス部23、24に、輪形部材40を車輪外周環状部13E、14Eの内側平坦面13G、14Gにそれぞれ超音波溶着により固着する。防塵カバー30が固着されたキャスタ本体12の本体側ボス部23、24に、左右の車輪13、14の車輪側ボス部13D、14Dを遊嵌させて車軸15を一方の車輪13の軸孔13Aから挿入し、他方の車輪14の外側外周面14Bに露出させ、ワッシャ22を介して螺子止め具19を螺着すると、キャスタ本体12と車輪13、14とが組み立てられる。そして、各側板17,18をそれぞれ車輪13、14に取り付けてキャスタ10の組立が完了する。   Next, the operation of the caster according to the above embodiment will be described. Prior to assembly, the caster 10 according to the above embodiment has the dust-proof cover 30 in the body-side boss portions 23 and 24 in which the caster body 12 is recessed, and the ring-shaped member 40 in the inner flat surface 13G of the wheel outer peripheral annular portions 13E and 14E. Each of them is fixed to 14G by ultrasonic welding. The wheel side boss portions 13D and 14D of the left and right wheels 13 and 14 are loosely fitted to the body side boss portions 23 and 24 of the caster body 12 to which the dust cover 30 is fixed, so that the axle 15 is connected to the shaft hole 13A of one wheel 13. The caster main body 12 and the wheels 13 and 14 are assembled when the screw stopper 19 is screwed through the washer 22 by being exposed to the outer peripheral surface 14B of the other wheel 14. Then, the side plates 17 and 18 are attached to the wheels 13 and 14, respectively, and the assembly of the caster 10 is completed.

このとき、キャスタ10は、キャスタ本体12と各車輪13、14との間に防塵カバー30と輪形部材40とにより防塵構造が形成され、回転する車輪13、14の内側は、防塵カバー30と輪形部材40とで覆われ異物の進入が阻止されるようになっている。また、キャスタ10の組み付け前に防塵カバー30と輪形部材40とを予めキャスター本体12と車輪13、14とにそれぞれ固着するようにしているので、組み付け時に従来のように防塵機構を取り付ける必要がなく、組み付け作業が効率化される。さらに、分解された既存のキャスタに防塵カバー30と輪形部材40を後から取り付けることができる。しかも、防塵カバー30と輪形部材40とは、外側から見えにくいので、キャスタの外観を損なうことがなくデザインに影響を与えることがない。さらに、輪形部材40の内周縁42と防塵カバー30の端縁35との間の隙間S2は、干渉しない程度の狭い空間としているので、塵や埃が回転側に入るのを確実に阻止することができ防塵性能が向上する。また、輪形部材40の内周縁42を防塵カバー30の外縁35に合致させてカットまたは折曲することにより、設計寸法の異なる多種のキャスタに対応させることができ、汎用性が高くなる。   At this time, in the caster 10, a dustproof structure is formed by the dustproof cover 30 and the ring-shaped member 40 between the caster body 12 and the wheels 13 and 14, and the inside of the rotating wheels 13 and 14 is the dustproof cover 30 and the ring shape. It is covered with the member 40 so that entry of foreign matter is prevented. In addition, since the dustproof cover 30 and the ring-shaped member 40 are fixed to the caster body 12 and the wheels 13 and 14 in advance before the caster 10 is assembled, it is not necessary to attach a dustproof mechanism at the time of assembly. Assembling work is made efficient. Further, the dustproof cover 30 and the ring-shaped member 40 can be attached later to the existing caster that has been disassembled. In addition, since the dustproof cover 30 and the ring-shaped member 40 are difficult to see from the outside, the appearance of the caster is not impaired and the design is not affected. Furthermore, since the clearance S2 between the inner peripheral edge 42 of the ring-shaped member 40 and the edge 35 of the dust cover 30 is a narrow space that does not interfere, it is possible to reliably prevent dust and dirt from entering the rotating side. And dustproof performance is improved. Further, by cutting or bending the inner peripheral edge 42 of the ring-shaped member 40 so as to match the outer edge 35 of the dustproof cover 30, it is possible to cope with various casters having different design dimensions, and the versatility is enhanced.

図6の(A)ないし(C)はそれぞれ、上記実施例の変形例に係るキャスタ110、210、310を示す縦断面である。図6の(A)に示す第1の変形例に係るキャスタ110は、上記実施例に係るキャスタ10が、キャスタ本体12両側面に本体側ボス部23、24を凹陥させて形成しているのに対し、キャスタ本体112のボス部の両側面123、124を平坦に形成している点が異なっている。このため、防塵カバー130は底部132が、平坦な本体側ボス部123、124に固着されるようになっている。また、この第1の変形例に係るキャスタ110は、一方の車輪113側に向かって固定される防塵カバー130は、底部132と、この底部132外周から立ち上がり内周が車輪側ボス部113Dより若干大径に形成された筒部133と、この筒部133に連続し、車輪113の内側凹陥部113Cにほぼ合致して形成される覆い部134とを備えて形成される。覆い部134は、筒部133に連続し拡開して形成される拡開部134Aと、この拡開部134Aに連続し、内側凹陥部113Cの形状に合わせて平坦に形成される平坦部134Bとを備えている。平坦部134Bの端縁135は、車輪113の外周環状部113Eの内周面に臨みこの内周面との間に空隙S101を形成するようになっている。輪形部材140は内周縁142側が折り曲げられて断面L字状の筒形に形成され、この内周縁142は防塵カバー130の外周側端縁135に臨むとともに、この外周側端縁135に重ならないようになっている。こうして、輪形部材140は、防塵カバー130の外周側端縁135に臨むとともに外周側端縁135との隙間S102を狭くするようになっている。   6A to 6C are longitudinal sections showing casters 110, 210, and 310 according to modifications of the above embodiment. The caster 110 according to the first modified example shown in FIG. 6A is formed by the body 10 bosses 23 and 24 being recessed on both sides of the caster body 12 in the caster 10 according to the above embodiment. On the other hand, it differs in that both side surfaces 123 and 124 of the boss portion of the caster body 112 are formed flat. For this reason, the dustproof cover 130 is configured such that the bottom portion 132 is fixed to the flat main body side boss portions 123 and 124. Further, in the caster 110 according to the first modified example, the dustproof cover 130 fixed toward the one wheel 113 side has a bottom 132 and an inner periphery rising from the outer periphery of the bottom 132 slightly more than the wheel-side boss 113D. The cylindrical portion 133 is formed to have a large diameter, and a cover portion 134 that is continuous with the cylindrical portion 133 and is formed so as to substantially match the inner recessed portion 113 </ b> C of the wheel 113. The cover portion 134 includes an expanded portion 134A that is formed by being continuously expanded to the cylindrical portion 133, and a flat portion 134B that is continuous with the expanded portion 134A and is formed flat according to the shape of the inner recessed portion 113C. And has. The edge 135 of the flat portion 134B faces the inner peripheral surface of the outer peripheral annular portion 113E of the wheel 113 so as to form a gap S101 with the inner peripheral surface. The ring-shaped member 140 is formed in a cylindrical shape having an L-shaped cross section by bending the inner peripheral edge 142 side. The inner peripheral edge 142 faces the outer peripheral edge 135 of the dust cover 130 and does not overlap the outer peripheral edge 135. It has become. Thus, the ring-shaped member 140 faces the outer peripheral side edge 135 of the dust cover 130 and narrows the gap S102 with the outer peripheral side edge 135.

図6の(B)に示す第2の変形例に係るキャスタ210は、上記実施例に係るキャスタ10が、キャスタ本体12両側面に本体側ボス部23、24を凹陥させて形成しているのに対し、キャスタ本体212のボス部223、224を円筒状に突出させて形成している点が異なっている。防塵カバー30の底部32は、キャスタ本体212のボス部223、224の円輪状端面に超音波溶着により固着されるようになっている。このように、防塵カバー30は、キャスタ本体212のボス部223、224が突出されて形成されていても、キャスタ本体212側に固着することができ、汎用性が高い。   The caster 210 according to the second modification shown in FIG. 6B is formed by the caster 10 according to the above-described embodiment having the main body side boss portions 23 and 24 recessed on both side surfaces of the caster main body 12. In contrast, the boss portions 223 and 224 of the caster body 212 are formed so as to protrude in a cylindrical shape. The bottom part 32 of the dust cover 30 is fixed to the annular end surfaces of the boss parts 223 and 224 of the caster body 212 by ultrasonic welding. Thus, even if the dust proof cover 30 is formed by protruding the boss portions 223 and 224 of the caster body 212, it can be fixed to the caster body 212 side, and is highly versatile.

図6の(C)に示す第3の変形例に係るキャスタ310は、第2の変形例に係るキャスタ210が、キャスタ本体212のボス部223、224を円筒状に突出させて形成し、防塵カバー30の底部32を、これらボス部223、224の円輪状端面に固着するようにしているのに対し、キャスタ本体312のボス部323、324を円筒状に突出させて形成するとともに、ボス部端面には、防塵カバー330が取り外し自在に装着される孔325が穿設され、防塵カバー330の底部332には、上記孔325に挿脱自在に圧入される差込み部336が形成される点が異なっている。このように、第3の変形例に係るキャスタ310では、キャスタ310を分解すると、防塵カバー330も取り外しできるようになっているので、万一、異物が車輪13、14に挟まっても容易に取り除くことができる。また、孔325をキャスタ本体312のボス部323、324に形成しているので、装置の大型化を避け、コンパクト化を図ることができる。   The caster 310 according to the third modification shown in FIG. 6C is formed by the caster 210 according to the second modification projecting the boss portions 223 and 224 of the caster body 212 in a cylindrical shape, While the bottom portion 32 of the cover 30 is fixed to the annular end surfaces of the boss portions 223 and 224, the boss portions 323 and 324 of the caster main body 312 are formed to protrude in a cylindrical shape, and the boss portion A hole 325 into which the dustproof cover 330 is detachably mounted is formed on the end surface, and an insertion portion 336 that is press-fitted in the hole 325 is formed in the bottom portion 332 of the dustproof cover 330. Is different. As described above, in the caster 310 according to the third modified example, when the caster 310 is disassembled, the dust cover 330 can also be removed. Therefore, even if foreign matter is caught between the wheels 13 and 14, it is easily removed. be able to. Further, since the holes 325 are formed in the boss portions 323 and 324 of the caster main body 312, it is possible to avoid an increase in the size of the apparatus and to make it compact.

なお、上記実施例に係るキャスタでは、防塵カバー30と輪形部材40との両者により回転側への異物の進入を阻止する防塵構造を構成するようにしているがこれに限られるものではなく、防塵カバー30の外縁35と車輪13、14との間隙を狭くすることにより、輪形部材を用いることなく防塵カバー単独でも異物の混入を防ぐようにすることもできる。また、上記実施例では、組立し易いように輪形部材40の内周縁42が防塵カバー30の外周側端縁35に重ならないようにしているが、これに限られるものではなく、内周縁42を外周側端縁35に重ねるようにし、組立てる時、輪形部材の内周縁が防塵カバー30に当たって折り曲げられると、組立後、防塵カバー30の外周側端縁35に臨むように、押し出して外すようにしてもよい。さらに、防塵カバー30と輪形部材40とはそれぞれ、超音波溶着によりキャスタ本体12と車輪13、14とに固着されているが接合手段はこれに限られるものではなく、例えば、接着剤により接着するようにしてもよいし、熱と圧力により圧着するようにしてもよい。このように、防塵カバー30と輪形部材40とはそれぞれ、キャスタの部品を構成するキャスタ本体12と車輪13、14とに固着されていればよく、キャスタの組立前や、組立時、組立後に限定されることがなく、既成のキャスタにも固着することができる。また、上記実施例では、輪形部材40、140を車輪13、14の外周環状部13E、14Eの内側平坦面13G、14Gに固着しているがこれに限られるものではなく、輪形部材を一端が折り曲げられたフランジ部を有する断面L字状の円筒形に形成し、外周環状部13E、14Eの内周面に固着するようにしてもよい。   In the caster according to the above embodiment, the dustproof cover 30 and the ring-shaped member 40 constitute a dustproof structure that prevents foreign matter from entering the rotating side. However, the present invention is not limited to this. By narrowing the gap between the outer edge 35 of the cover 30 and the wheels 13, 14, it is possible to prevent foreign matter from being mixed even with the dustproof cover alone without using a ring-shaped member. Further, in the above embodiment, the inner peripheral edge 42 of the ring-shaped member 40 is not overlapped with the outer peripheral side edge 35 of the dustproof cover 30 for easy assembly, but the present invention is not limited to this. When assembling, when the inner peripheral edge of the ring-shaped member hits the dust-proof cover 30 and is folded, it is pushed out so that it faces the outer-end edge 35 of the dust-proof cover 30 after assembly. Also good. Further, the dust cover 30 and the ring-shaped member 40 are fixed to the caster body 12 and the wheels 13 and 14 by ultrasonic welding, respectively, but the joining means is not limited to this, and for example, they are bonded by an adhesive. Alternatively, it may be crimped by heat and pressure. Thus, the dust cover 30 and the ring-shaped member 40 are only required to be fixed to the caster main body 12 and the wheels 13 and 14 constituting the caster parts, and are limited to before the caster is assembled, at the time of assembly, and after the assembly. It can be fixed to an existing caster. In the above embodiment, the ring-shaped members 40 and 140 are fixed to the inner flat surfaces 13G and 14G of the outer peripheral annular portions 13E and 14E of the wheels 13 and 14, but the present invention is not limited to this. It may be formed in a cylindrical shape with an L-shaped cross section having a bent flange portion, and may be fixed to the inner peripheral surfaces of the outer peripheral annular portions 13E and 14E.

本発明の一実施例に係るキャスタを示す側面図である。(実施例1)It is a side view which shows the caster which concerns on one Example of this invention. Example 1 図1のキャスタの縦断面図である。It is a longitudinal cross-sectional view of the caster of FIG. 図1のキャスタのキャスタ本体に防塵カバーを取り付けた状態を示す説明図である。It is explanatory drawing which shows the state which attached the dustproof cover to the caster main body of the caster of FIG. 図1のキャスタの防塵カバーと輪形部材とを示す一部破断側面図である。It is a partially broken side view which shows the dustproof cover and ring-shaped member of the caster of FIG. 図1のキャスタの要部を拡大して示す要部拡大断面図である。It is a principal part expanded sectional view which expands and shows the principal part of the caster of FIG. (A)ないし(C)はそれぞれ、図1のキャスタの変形例を示す縦断面図である。(実施例2)(A) thru | or (C) is a longitudinal cross-sectional view which respectively shows the modification of the caster of FIG. (Example 2) 従来のキャスタを示す横断面図である。It is a cross-sectional view showing a conventional caster.

符号の説明Explanation of symbols

10 キャスタ
12 キャスタ本体
13、14 車輪
13F、14F 凹陥部(車輪のキャスタ本体と向き合う側の面)
15 車軸
30 防塵カバー
35 端縁(外周側端縁)
S2 隙間
10 casters 12 caster bodies 13, 14 wheels 13F, 14F recessed portions (surfaces of wheels facing the caster bodies)
15 Axle 30 Dust cover 35 Edge (outer edge)
S2 gap

Claims (3)

キャスタ本体に車輪が車軸を介して回転可能に支持されたキャスタにおいて、
キャスタ本体には、車輪のキャスタ本体と向き合う側の面を覆う防塵カバーを固着し、車輪のキャスタ本体側内側面の外周部には、内周縁が防塵カバーの外周側端縁に臨みこの外周側端縁との間に異物の進入を阻止しこの外周側端縁と干渉しない程度の狭隘な隙間を形成する輪形部材を固着したことを特徴とするキャスタ。
In a caster whose wheels are rotatably supported by the caster body via an axle,
A dustproof cover that covers the surface of the caster body facing the caster body is fixed to the caster body, and the outer periphery of the inner surface of the wheel on the caster body side faces the outer edge of the dustproof cover. A caster characterized in that a ring-shaped member that forms a narrow gap that prevents entry of foreign matter between the end edge and the outer edge on the outer peripheral side is fixed.
防塵カバーはキャスタ本体に、輪形部材は車輪にそれぞれ、超音波溶着、接着剤による接着または圧着のうちいずれか1の接合手段により固着されることを特徴とする請求項1に記載のキャスタ。 The caster according to claim 1, wherein the dustproof cover is fixed to the caster body, and the ring-shaped member is fixed to the wheel by any one of ultrasonic welding, adhesive bonding, or pressure bonding. 車輪は、キャスタ本体両側に配設されるとともに、車輪のキャスタ本体側内側面には、外周部とボス部との間に凹陥部が形成され、防塵カバーはこれらボス部と凹陥部とを覆ことを特徴とする請求項1に記載のキャスタ。 The wheels are arranged on both sides of the caster body , and a recess is formed between the outer peripheral portion and the boss on the inner surface of the wheel on the caster body , and the dust cover covers the boss and the recess. caster according to claim 1, wherein the cormorants.
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JP6338823B2 (en) * 2013-05-09 2018-06-06 東海キャスター株式会社 Twin wheel casters
CN105291692A (en) * 2015-09-22 2016-02-03 李东丹 Dustproof structure
CN106976357B (en) * 2017-05-12 2023-06-02 广州鹰堡美发用品厂有限公司 Roller wheel

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