JP5596629B2

JP5596629B2 - Caster mounting structure

Info

Publication number: JP5596629B2
Application number: JP2011136840A
Authority: JP
Inventors: 直行岡本
Original assignee: 直行岡本
Priority date: 2011-06-21
Filing date: 2011-06-21
Publication date: 2014-09-24
Anticipated expiration: 2031-06-21
Also published as: JP2013001337A

Description

本発明は、物品を搬送する運搬台車などにおいて、その取付バイプにキャスターの取付シャフトを固着するための取付構造に関するものである。 The present invention relates to an attachment structure for fixing an attachment shaft of a caster to an attachment vip thereof in a transport cart for conveying articles.

例えば台車の下部に設けられる取付バイプに当該台車のキャスターの取付シャフトを固着するためのキャスター取付構造は、従来から種々の取付構造が知られ、そのうちの代表的なものを図８に示している（非特許文献）。但し、同図は、その取り付けのしかたを示す説明図である。
同図（Ａ）は、取付バイプ１００にキャスター１０１を挿入し終えたところを示している。より具体的に説明すれば、キャスター１０１は、その車輪軸１０２に支持されたヨーク１０３の上面の台座１０４にボルト形状をなす取付シャフト１０５が突設された形態をなし、かかる取付シャフト１０５の頭部１０５ａが台座１０４に固着される一方、その首下部１０５ｂには所定長さをなしてネジ溝が螺刻されている。そして、この取付シャフト１０５の首下部１０５ｂには、当該取付シャフト１０５の頭部１０５ａに当接してリング１０６の鍔部１０６ａが、更に、このリング１０６の本体部１０６ｂに当接して弾性部材１０７が、更にまた、この弾性部材１０７に当接し、且つ、首下部１０５ｂのネジ溝に螺合した態様で取付ナット１０８が、串刺状をなして装着されている。同図（Ａ）は、このようなキャスター１０１の取付シャフト１０５を、換言すれば、弾性部材１０７等が串刺状をなして装着されたキャスター１０１の取付シャフト１０５を、取付バイプ１００にリング１０６の鍔部１０６ａ（この鍔部１０６ａの外径は取付バイプ１００のそれと略等しい寸法に製作されている）が当該取付バイプ１００の端面部に当接するまで挿入したところを示している。そして、挿入し終えた後、取付バイプ１００にキャスター１０１を固着する場合には、その取付シャフト１０５の頭部１０５ａを、同図（Ｂ）に示すように、適宜な方向に、例えばスパナなどを用いて回転していくと、それに応じて取付ナット１０８が弾性部材１０７を圧縮する方向に進み、その結果、弾性部材１０７が取付バイプ１００の内壁面を押圧する態様をなして変形する。これにより、弾性部材１０７と取付バイプ１００との間に大きな摩擦力が生ずることになり、キャスター１０１が取付バイプ１００に固着されるようになる。 For example, as for a caster mounting structure for fixing a mounting shaft of a caster of the cart to a mounting vip provided at a lower portion of the cart, various mounting structures are conventionally known, and a representative one of them is shown in FIG. (Non-patent literature). However, this figure is explanatory drawing which shows the attachment method.
FIG. 2A shows a state where the caster 101 has been inserted into the attachment vip 100. More specifically, the caster 101 has a configuration in which a bolt-shaped mounting shaft 105 projects from a base 104 on the upper surface of the yoke 103 supported by the wheel shaft 102, and the head of the mounting shaft 105. While the portion 105a is fixed to the pedestal 104, a screw groove is screwed into the lower neck portion 105b of a predetermined length. Then, the neck lower portion 105b of the mounting shaft 105, the flange portion 106a of the-ring 106 abuts the head 105a of the mounting shaft 105 is further elastic member 107 abuts the body portion 106b of the ring 106 However, the mounting nut 108 is mounted in a skewered manner in such a manner that it abuts against the elastic member 107 and is screwed into the thread groove of the lower neck portion 105b. FIG. 6A shows such an attachment shaft 105 of the caster 101, in other words, the attachment shaft 105 of the caster 101 in which the elastic member 107 or the like is mounted in a skewer shape, It is shown that the flange portion 106a (the outer diameter of the flange portion 106a is manufactured to have a dimension substantially equal to that of the attachment vip 100) is inserted until it comes into contact with the end surface portion of the attachment vip 100. After the insertion, when the caster 101 is fixed to the mounting vip 100, the head 105a of the mounting shaft 105 is placed in an appropriate direction, for example, with a spanner as shown in FIG. As it is rotated, the mounting nut 108 advances in the direction in which the elastic member 107 is compressed. As a result, the elastic member 107 is deformed in such a manner that it presses the inner wall surface of the mounting vip 100. As a result, a large frictional force is generated between the elastic member 107 and the attachment vip 100, and the caster 101 is fixed to the attachment vip 100.

しかしながら、上述した従来のキャスター取付構造においては、特に取付バイプの内径にバラツキがあるために、弾性部材等が串刺状をなして装着された取付シャフトを取付バイプに挿入することが容易でない場合があり、そのような場合にはハンマー等を用いて無理やり押し込まなければならなくなる不具合があり、また、圧縮された弾性部材が取付バイプの内壁面を押圧する場合に、当該内壁面を一様に押圧せずに、例えば図８（Ｂ）に示すように、圧縮されて変形した弾性部材が取付バイプの内壁面を片寄りを以って押圧するようなことがあって、結果として、弾性部材と取付バイプとの間に大きな摩擦力が生じにくくなり、キャスターが取付バイプから容易に脱落してしまう不具合が多分にある。
カタログＮｏ．ＶＯＬ４−４７７頁株式会社ナンシン平成２１年３月発行インターネット＜ＵＲＬ：http://www.nansin.co.jp＞ However, in the conventional caster mounting structure described above, there is a case where it is not easy to insert the mounting shaft on which the elastic member or the like is mounted in a skewered shape because the inner diameter of the mounting vip varies. In such a case, there is a problem that it must be forced to use a hammer or the like, and when the compressed elastic member presses the inner wall surface of the mounting vip, the inner wall surface is uniformly pressed. For example, as shown in FIG. 8B, an elastic member that is compressed and deformed may press the inner wall surface of the mounting vip with a deviation. As a result, the elastic member A large frictional force is unlikely to be generated between the mounting vip and the caster easily falls off the mounting vip.
Catalog No. VOL4-4 Page 77 Nanshin Co., Ltd. Published in March 2009 Internet <URL: http://www.nansin.co.jp>

解決しようとする問題点は、台車の取付バイプにキャスターの取付シャフトを固着する取付作業に際して、工具などを使用することなくワンタッチで容易に行え、しかも、キャスターが取付バイプから脱落しにくい取付構造のものとすることである。 The problem to be solved is that the mounting work of fixing the caster's mounting shaft to the mounting vip of the carriage can be easily done with one touch without using tools, etc., and the caster is not easily dropped from the mounting vip. Is to be.

本発明の請求項１に係るキャスター取付構造は、台車の下部に設けられる取付バイプに前記台車のキャスターの取付シャフトを固着するためのキャスター取付構造であって、前記取付バイプに挿入する軸部の外周面に所定形状の突条が当該軸部に沿って所定間隔を隔てて複数個所に設けられるとともに、この軸部の下方に前記取付バイプへの挿入が完了したときに当該取付バイプの端部が当接する当接部位を凸底面とするフランジが設けられた前記取付シャフトと、この取付シャフトの外周で、その軸方向に沿って装着される複数に分割されたスリーブ片で構成され、これらスリーブ片の内周面には、前記取付シャフトの挿入が完了したとき前記突条に対向する突起がそれぞれ設けられ、これらスリーブ片の最下端部が、前記取付シャフトの挿入が完了したときに前記フランジの凹底面に当接するとともに、前記取付バイプの、前記最下端部に成形された折曲部への押圧作用に伴って当該最下端部の折曲部が前記取付バイプの外周面に圧接され、同時に前記フランジの鍔部によって案内されるように挙動するスリーブと、このスリーブの、前記突起部と背中合わせになる外周位置にそれぞれ装着されて、前記取付シャフトの挿入が完了したときに前記取付バイプとの間で適宜な弾性変形してなる弾性部材とを備えたもので、これにより、台車の取付バイプにキャスターの取付シャフトを固着する取付作業に際して、工具などを使用することなくワンタッチで容易に行え、しかも、キャスターが取付バイプから脱落しにくくすることができる。
尚、取付シャフトの材質としては、鉄やアルミなどの金属製が一般的であるが、場合により樹脂製のものであってもよい。また、スリーブの材質としては、樹脂やゴムなどの高分子化合物製が一般的であるが、場合によりアルミなどの非鉄金属製のものであってもよい。 A caster mounting structure according to claim 1 of the present invention is a caster mounting structure for fixing a mounting shaft of a caster of the cart to a mounting vip provided at a lower portion of the cart, and a shaft portion to be inserted into the mounting vip. A plurality of protrusions having a predetermined shape are provided on the outer peripheral surface at a predetermined interval along the shaft portion, and an end portion of the mounting vibe when the insertion into the mounting vip is completed below the shaft portion. The mounting shaft is provided with a flange having a convex bottom surface as a contact portion with which the sleeve contacts, and the sleeve is divided into a plurality of sleeve pieces mounted along the axial direction on the outer periphery of the mounting shaft. The inner peripheral surface of each piece is provided with a protrusion that faces the ridge when the insertion of the mounting shaft is completed, and the lowermost ends of these sleeve pieces are formed on the mounting shaft. When the fitting is completed, the bent bottom portion of the flange comes into contact with the concave bottom surface of the flange, and the bent portion of the lowermost end portion is attached to the mounting portion by the pressing action to the bent portion formed at the lowermost end portion of the mounting vip. A sleeve that is pressed against the outer peripheral surface of the vip and behaves so as to be simultaneously guided by the flange portion of the flange, and an outer peripheral position of the sleeve that is back-to-back with the protruding portion are mounted, and the mounting shaft is inserted. It is equipped with an elastic member that is appropriately elastically deformed with the mounting vip when it is completed, so that tools can be used for mounting the caster mounting shaft to the mounting vip of the carriage This can be easily done with a single touch without causing the caster to fall off the mounting vip.
The material of the mounting shaft is generally made of metal such as iron or aluminum, but may be made of resin depending on the case. The sleeve is generally made of a polymer compound such as resin or rubber, but may be made of non-ferrous metal such as aluminum in some cases.

本発明の請求項２に係るキャスター取付構造は、台車の下部に設けられる取付バイプに前記台車のキャスターの取付シャフトを固着するためのキャスター取付構造であって、前記取付バイプに挿入する軸部の外周面に所定形状の突条が当該軸部に沿って所定間隔を隔てて複数個所設けられるとともに、その軸部の下方に前記取付バイプへの挿入が完了したときに当該取付バイプの端部が当接する当接部位を凸底面とするフランジが設けられ、更に、このフランジの外周面にネジ溝が螺刻された前記取付シャフトと、この取付シャフトの外周で、その軸方向に沿って装着される複数に分割されたスリーブ片で構成され、これらスリーブ片の内周面には、前記取付シャフトの挿入が完了したときに前記突条に対向する突起がそれぞれ設けられ、これらスリーブ片の最下端部が、前記取付シャフトの挿入が完了したときに前記フランジの凹底面に当接するとともに、前記ネジ溝に螺合する固定ナットに設けられたテーパ面の、前記最下端部に成形された折曲部への押圧作用に伴って当該最下端部の折曲部が前記取付バイプの外周面に圧接されるように挙動するスリーブと、このスリーブの、前記突起部と背中合わせになる外周面にそれぞれ装着され、前記取付シャフトの挿入が完了したときに前記取付バイプとの間で適宜な弾性変形してなる弾性部材とを備えたもので、これにより、台車の取付バイプにキャスターの取付シャフトを固着する取付作業に際して、工具などを使用することなくワンタッチで容易に行え、しかも、キャスターが取付バイプから脱落しにくくすることができる。
尚、上記同様に、取付シャフトの材質としては、鉄やアルミなどの金属製が一般的であるが、場合により樹脂製のものであってもよい。また
、スリーブの材質としては、樹脂やゴムなどの高分子化合物製が一般的であるが、場合によりアルミなどの非鉄金属製のものであってもよい。 A caster mounting structure according to claim 2 of the present invention is a caster mounting structure for fixing a mounting shaft of a caster of the cart to a mounting vip provided at a lower portion of the cart, and a shaft portion inserted into the mounting vip. A plurality of protrusions having a predetermined shape are provided on the outer peripheral surface at predetermined intervals along the shaft portion, and when the insertion into the mounting vip is completed below the shaft portion, A flange having a projecting bottom surface as a contact portion to be contacted is provided, and the mounting shaft in which a thread groove is threaded on the outer peripheral surface of the flange, and the outer periphery of the mounting shaft is mounted along the axial direction. that plurality is constituted by split sleeve piece, on the inner peripheral surface of the sleeve piece, the opposing projections are respectively provided on the protrusion when inserting the mounting shaft is completed, this The lowermost end portion of the sleeve piece comes into contact with the concave bottom surface of the flange when the insertion of the mounting shaft is completed, and the lowermost end portion of a tapered surface provided on a fixing nut screwed into the thread groove A sleeve that behaves so that the bent portion at the lowermost end is pressed against the outer peripheral surface of the mounting vip with a pressing action on the bent portion formed on the sleeve, and the protruding portion of the sleeve back to back And an elastic member that is appropriately elastically deformed with the mounting vip when insertion of the mounting shaft is completed, whereby a caster is attached to the mounting vip of the carriage. In the mounting operation for fixing the mounting shaft, it can be easily performed with one touch without using a tool or the like, and the caster can be prevented from falling off the mounting vip.
As described above, the mounting shaft is generally made of a metal such as iron or aluminum, but may be made of resin depending on the case. The sleeve is generally made of a polymer compound such as resin or rubber, but may be made of non-ferrous metal such as aluminum in some cases.

本発明の請求項３に係るキャスター取付構造において、前記折曲部には、前記取付バイプの外周面との圧接を強固にするべく樹脂部材が添着されているもので、結果として、取付シャフトの、取付バイプへの固着を強固にできる効果を有する。
ところで、上記折曲部に添着される樹脂部材の材質としては、ポリアセタールやＰＡ６（６ナイロン）、ＡＢＳなど種々のものが採用される。 In the caster mounting structure according to claim 3 of the present invention, a resin member is attached to the bent portion in order to strengthen the pressure contact with the outer peripheral surface of the mounting vip. , It has the effect of being able to strengthen the fixing to the mounting vip.
By the way, various materials such as polyacetal, PA6 (6 nylon), and ABS are adopted as the material of the resin member attached to the bent portion.

本発明のキャスター取付構造は、台車の取付バイプにキャスターの取付シャフトを固着する取付作業が、工具などを用いることなく取付バイプに取付シャフトを挿入するだけでワンタッチで容易に完了するという利点があり、また、キャスターが取付バイプから脱落しにくいという利点がある。 The caster mounting structure of the present invention has an advantage that the mounting operation for fixing the caster mounting shaft to the mounting vip of the carriage can be easily completed with one touch only by inserting the mounting shaft into the mounting vip without using a tool or the like. Also, there is an advantage that the caster is difficult to fall off from the mounting vip.

本発明の第１の実施形態に係るキャスター取付構造を図１〜３を参照して説明する。
このキャスター取付構造は、図１に示すような、台車（図示せず）の下部に設けられる取付バイプ１に当該台車のキャスター（図示せず）の取付シャフト２を挿入するだけでワンタッチで固着可能にするとともに、挿入したキャスターが脱落しにくいものとなっている。尚、本実施の形態に係るキャスターの取付シャフト２は、その下軸部２ｄに螺刻されたネジによってキャスター本体（図示せず）に螺着される構造をなしている。
本キャスター取付構造における取り付けのしかたを説明する前に、本キャスター取付構造を構成する構成部品について説明する。
この構成部品のうちの上記取付シャフト２は、図２に示すような形態をなすもので、当該取付シャフト２の、取付バイプ１に挿入する上軸部（軸部）２ａの外周面には、本実施の形態では、扁平な湾曲面形状（所定形状）をなす突条２ａ_１が当該上軸部２ａに沿って所定間隔を隔てて３（複数）箇所に設けられる一方、この上軸部２ａの最下部には、その外周に短寸の鍔部２ｂ_１を有する円板状のフランジ２ｂが連設され、このフランジ２ｂの鍔部２ｂ_１と上軸部２ａとの間に形成されるドーナツ状の溝底２ｃ側には、同図（Ａ）に示すような、この溝底の円周方向に沿って等間隔に、且つ、互いに隣り合わせに略扇状の、同図（Ｂ）に示すような浅溝（凸底面）２ｃ_１及び深溝（凹底面）２ｃ_２が設けられ、これら浅溝２ｃ_１及び深溝２ｃ_２によって凹凸形状が形成されている。そして、この浅溝２ｃ_１の溝底には、取付シャフト２の、取付バイプ１への挿入が完了したときに当該取付バイプ１の端部が当接する一方、この深溝２ｃ_２の溝底には、取付シャフト２の挿入が完了したときに後述するスリーブ３の各スリーブ片３ａ〜３ｃの、例えばスリーブ片３ａの下面（スリーブ片の最下端部）５ａが当接する（図１（Ｂ）参照）。 A caster mounting structure according to a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, this caster mounting structure can be fixed with one touch only by inserting a mounting shaft 2 of a caster (not shown) of the cart into a mounting vip 1 provided at the lower portion of the cart (not shown). In addition, the inserted caster is difficult to fall off. The caster mounting shaft 2 according to the present embodiment has a structure that is screwed to a caster body (not shown) by a screw threaded on the lower shaft portion 2d.
Before explaining how to attach the caster mounting structure, the components constituting the caster mounting structure will be described.
Of these components, the mounting shaft 2 has a form as shown in FIG. 2. On the outer peripheral surface of the upper shaft portion (shaft portion) 2 a to be inserted into the mounting vip 1 of the mounting shaft 2, In the present embodiment, the ridges 2a ₁ having a flat curved surface shape (predetermined shape) are provided at three (plurality) locations along the upper shaft portion 2a at a predetermined interval, while the upper shaft portion 2a. A disc-shaped flange 2b having a short flange 2b ₁ on the outer periphery thereof is connected to the lowermost portion of the flange, and a donut formed between the flange 2b ₁ of the flange 2b and the upper shaft portion 2a. On the groove-shaped groove bottom 2c side, as shown in FIG. 4B, the fan-shaped groove bottoms are substantially fan-shaped and adjacent to each other along the circumferential direction of the groove bottom as shown in FIG. a shallow groove (convex bottom surface) 2c ₁ and deep groove (concave bottom surface) 2c ₂ are provided, these shallow grooves 2c ₁ and the deep grooves It is formed uneven by c _2. The groove bottom of the shallow groove 2c ₁ comes into contact with the end of the mounting vibe 1 when the insertion of the mounting shaft 2 into the mounting vip 1 is completed, while the groove bottom of the deep groove 2c ₂ , of each sleeve piece 3a~3c Luz sleeve 3 to be described later when the insertion of the mounting shaft 2 is completed, for example (the lowermost end of the sleeve piece) the lower surface of the sleeve piece 3a 5a abuts (Figure 1 (B) reference).

ところで、符号２ｄは、上記フランジ２ｂに連設される下軸部で、取付シャフト２は、上述のように、その下軸部２ｄの下端に螺刻されたネジによってキャスター本体に螺着される。また、符号２ａ_２は、上記上軸部２ａの上端に設けられた円錐台状の鍔で、この鍔２ａ_２は、後に詳述するように、この鍔２ａ_２にスリーブ３の上端を当接させるようにして当該スリーブ３を取付シャフト２に装着するときの位置決めとして設けられるとともに、工具を使用して取付シャフト２をキャスター本体から脱着させるときの当該工具の把持部として設けられている。 By the way, reference numeral 2d is a lower shaft portion connected to the flange 2b, and the mounting shaft 2 is screwed to the caster main body by a screw threaded at the lower end of the lower shaft portion 2d as described above. . Further, reference numeral 2a ₂ is above the shaft portion 2a upper end frustoconical flange provided for, the flange 2a _2, as will be described later in detail, the upper end of the sleeves 3 equivalents to the flange 2a ₂ together provided as positioning when so as to contact to mount the person 該Su leave 3 to the mounting shaft 2, provided as a grip portion of the tool when desorbing mounting shaft 2 using a tool from the castor body Yes.

この構成部品のスリーブ３は、取付シャフト２の外周に装着される、本実施の形態では、図３に示すような３つ（複数）の同一の、断面略扇形状のスリーブ片３ａ〜３ｃで構成され、これらスリーブ片３ａ〜３ｃは、互いに１２０度の円周角を隔てて取付シャフト２の外周で、その軸方向に沿って装着される（図１も参照）。これらスリーブ片３ａ〜３ｃのうちの、例えばスリーブ片３ａについて説明すれば、スリーブ片３ａは、上述のように断面略扇形状をなす長柱状片部材で、この柱状片部材の内周面には、取付シャフト２の、取付バイプ１への挿入が完了したとき上記突条２ａ_１に対向する突起３ａ_１がそれぞれ設けられ、この突起３ａ_１に対峙する当該柱状片部材の外周面には、後述の弾性部材８を介装するための浅凹溝３ａ_２がそれぞれ設けられている。そして、この柱状片部材の最下端部に、図３（Ｂ）に示すような、当該最下端部をいくらか深目の略Ｕ字状溝５が形成されるように折曲して成形された折曲部４が設けられ、このようにして設けられた折曲部４を含む最下端部で形成される上記溝５の下面５ａは、上述したように取付シャフト２の挿入が完了したときに上記フランジ２ｂの深溝２ｃ_２に当接するようになっている。また、上記溝５を形成している外周面５ｂは、当該溝５の溝幅がその溝底からその開口口に向かうに従って漸次拡くなるように当該溝５の内周面５ｃに対し所定傾斜角のテーパ面で以って形成されている。この結果、取付シャフト２の、取付バイプ１への挿入に際して当該取付バイプ１が折曲部４の外周面５ｂに当接して当該折曲部４を押圧するようになり（図１（Ａ）参照）、かかる押圧作用に伴ってこの折曲部４が、後に詳述するように取付バイプ１の外周面に圧接される方向、即ち、図１（Ａ）中の矢印方向に挙動する。但し、本実施の形態では、この外周面５ｂには、取付バイプ１の外周面に対し強固に圧接させるべく樹脂部材７が添着されている（図１参照）。
ところで、折曲部４の外周面４ａと溝５の下面５ａとの略交差部に設けられた切欠き６は、上述した押圧作用に伴って折曲部４が図１（Ａ）中の矢印方向に傾動するのを助長するためのものである。 The sleeve 3 of this component is mounted on the outer periphery of the mounting shaft 2. In the present embodiment, three (a plurality of) sleeve pieces 3 a to 3 c having the same fan-shaped cross section as shown in FIG. These sleeve pieces 3a to 3c are mounted along the axial direction on the outer periphery of the mounting shaft 2 with a circumferential angle of 120 degrees from each other (see also FIG. 1). Of the sleeve pieces 3a to 3c, for example, the sleeve piece 3a will be described. The sleeve piece 3a is a long columnar piece member having a substantially fan-shaped cross section as described above, and is formed on the inner peripheral surface of the columnar piece member. , the mounting shaft 2, inserted into the mounting Baipu 1 each projection 3a ₁ which faces are provided on the ridges 2a ₁ when completed, the outer peripheral surface of the columnar piece member that faces this projection 3a ₁ is described below The shallow groove 3a ₂ for interposing the elastic member 8 is provided. Then, at the lowermost end portion of the columnar piece member, the lowermost end portion as shown in FIG. 3 (B) is bent and formed so that a somewhat deeper substantially U-shaped groove 5 is formed. When the insertion of the mounting shaft 2 is completed as described above, the lower surface 5a of the groove 5 formed at the lowermost end portion including the bent portion 4 provided with the bent portion 4 is provided. It is adapted to abut against the deep groove 2c ₂ of the flange 2b. The outer peripheral surface 5b forming the groove 5 has a predetermined inclination with respect to the inner peripheral surface 5c of the groove 5 so that the groove width of the groove 5 gradually increases from the groove bottom toward the opening. It is formed by a corner taper surface. As a result, when the mounting shaft 2 is inserted into the mounting vip 1, the mounting vip 1 comes into contact with the outer peripheral surface 5b of the bent part 4 and presses the bent part 4 (see FIG. 1A). ), The bent portion 4 behaves in the direction in which it is pressed against the outer peripheral surface of the mounting vip 1, that is, in the direction of the arrow in FIG. However, in the present embodiment, the resin member 7 is attached to the outer peripheral surface 5b so as to be firmly pressed against the outer peripheral surface of the mounting vip 1 (see FIG. 1).
By the way, the notch 6 provided in the substantially intersection part of the outer peripheral surface 4a of the bending part 4 and the lower surface 5a of the groove | channel 5 is the arrow in FIG. This is to help tilt in the direction.

この構成部品の弾性部材８は、本実施の形態では横断面が小円形状のＯリング状のもので、スリーブ３の、例えばスリーブ片３ａの、上記浅凹溝３ａ_２にそれぞれ装着され、取付シャフト２の挿入が完了したときに、取付シャフト２の突条２ａ_１と、スリーブ３の、例えばスリーブ片３ａの突起３ａ_１とが重なり合うことによる圧縮作用によって取付バイプ１との間で適宜な弾性変形をしてなるものである。 The components of the elastic member 8 is intended cross section of a small circular O-ring-shaped in this embodiment, the sleeves 3, for example, the sleeve piece 3a, respectively are mounted on the shallow groove 3a _2, when inserting the mounting shaft 2 is completed, the ridges 2a ₁ of the mounting shaft 2, the sleeves 3, appropriately between the mounting Baipu 1 by compression action by which the projection 3a ₁ overlap, for example, the sleeve piece 3a It is made by elastic deformation.

本キャスター取付構造における取り付けのしかたを図１を参照して説明する。
図１（Ａ）の状態にするまでに、予め取付シャフト２をキャスター本体に取り付けておき、取り付けた状態でスリーブ３を、そのスリーブ片３ａ〜３ｃの上端を取付シャフト２の鍔２ａ_２に当接させた状態で当該取付シャフト２に装着しておく。このとき、同図に示すように、例えばスリーブ片３ａの突起３ａ_１は取付シャフト２の突条２ａ_１が互いに重なり合う位置からズレた位置で装着されるようになっている。そして、例えばスリーブ片３ａの、折曲部４を含む最下端部は、取付シャフト２のフランジ２ｂから所定距離だけ離隔した位置で装着されるようになっている。また、弾性部材８についても、例えばスリーブ片３ａの浅凹溝３ａ_２に予め装着しておく。しかる後、取付シャフト２を取付バイプ１に挿入して行くと、同図に示すような、取付バイプ１の端部が、例えばスリーブ片３ａの折曲部４に当接する状態になる。 The mounting method in the caster mounting structure will be described with reference to FIG.
Before the state of FIG. 1 (A), the pre-mounting shaft 2 previously attached to the caster body, the state death sleeve 3 mounted, the upper end of the sleeve piece 3a~3c the flange 2a ₂ of the mounting shaft 2 It is mounted on the mounting shaft 2 in a contact state . At this time, as shown in the figure, for example, the protrusion 3a ₁ of the sleeve piece 3a is mounted at a position shifted from the position where the protrusions 2a ₁ of the mounting shaft 2 overlap each other. For example, the lowermost end portion of the sleeve piece 3 a including the bent portion 4 is mounted at a position separated from the flange 2 b of the mounting shaft 2 by a predetermined distance. The elastic member 8 is also mounted in advance in the shallow groove 3a ₂ of the sleeve piece 3a, for example. Thereafter, when the attachment shaft 2 is inserted into the attachment vip 1, the end of the attachment vip 1 comes into contact with the bent part 4 of the sleeve piece 3a as shown in FIG.

このような当接状態においては、取付バイプ１の端部が樹脂部材７を介して、例えばスリーブ片３ａの折曲部４の上記テーパ面を押圧することになる。すると、この押圧作用により折曲部４は、図１（Ａ）に矢印で示す方向に傾動するが、更に取付シャフト２を挿入して行くと、当該取付シャフト２のフランジ２ｂに設けられた鍔部２ｂ_１に当該折曲部４の外周面４ａが接触するようになって当該折曲部４が鍔部２ｂ_１に案内される態様となると同時に上記傾動が進み、最終的には図１（Ｂ）に示す状態、即ち、折曲部４が取付バイプ１の外周面に圧接される状態と同時にフランジ２ｂの鍔部２ｂ_１によって上記圧接が保持される状態となって取付シャフト２の挿入が完了する。かかる完了時に、取付シャフト２のフランジ２ｂの浅溝２ｃ_１に取付バイプ１の端部が当接する（かかる当接時に金属音が発せられるので、上記完了が認識できる。）とともに、取付シャフト２のフランジ２ｂの深溝２ｃ_２に、例えばスリーブ片３ａでは上記溝５の下面５ａが当接する。そして、完了時には、弾性部材８は、取付シャフト２とスリーブ３を介して取付バイプ１との間で片寄りを生ずることなく一様に弾性変形されるとともに、樹脂部材７は、スリーブ片３ａの折曲部４が取付バイプ１の外周面に強固に圧接されるのを助長する。これにより、取付シャフト２の、取付バイプ１への固着をワンタッチで、しかも、強固に行える。 In such a contact state, the end portion of the attachment vip 1 presses the tapered surface of the bent portion 4 of the sleeve piece 3a, for example, via the resin member 7. Then, the bent portion 4 tilts in the direction indicated by the arrow in FIG. 1A due to this pressing action, but when the mounting shaft 2 is further inserted, the bend provided on the flange 2b of the mounting shaft 2 the bent portion 4 proceeds at the same time the tilting becomes a manner guided by the flange portion 2b ₁ in section 2b ₁ so as the outer circumferential surface 4a of the bent portion 4 are in contact, eventually FIG. 1 ( B), that is, the state in which the bent portion 4 is pressed against the outer peripheral surface of the mounting vip 1 and at the same time the pressure contact is maintained by the flange portion 2b _{1 of the} flange 2b, and the mounting shaft 2 is inserted. Complete. At the time of completion, the end of the attachment vip 1 comes into contact with the shallow groove 2c ₁ of the flange 2b of the attachment shaft 2 (a metal noise is emitted at the time of such contact, so that the completion can be recognized) and the attachment shaft 2 the deep groove 2c ₂ of the flange 2b, for example, the lower surface 5a of the groove 5 in the sleeve piece 3a abuts. At the time of completion, the elastic member 8, while being uniformly elastically deformed without causing offset between the mounting Baipu 1 via the mounting shaft 2 and sleeves 3, the resin member 7, the sleeve piece 3a This facilitates that the bent portion 4 is firmly pressed against the outer peripheral surface of the attachment vip 1. Thereby, the attachment shaft 2 can be firmly fixed to the attachment vip 1 with one touch.

次に、本発明の第２の実施形態に係るキャスター取付構造を図４〜７を参照して説明する。尚、図４〜６において、図１〜３の構成部材と同一のものについては同一番号を付し、その説明は割愛する。
本キャスター取付構造が上記第１の実施形態に係るキャスター取付構造と異なるところは、第１の実施形態に係るキャスター取付構造では、取付バイプ１の、折曲部４への押圧作用に伴ってこの折曲部４が取付バイプ１の外周面に圧接されるように当該折曲部４を挙動させるものであったが、本キャスター取付構造では、スリーブ１３の、例えばスリーブ片１３ａの折曲部１４に対し、固定ナット１６に設けられた内周面１６ｂ_１のテーパ面からの反時計回り方向の押圧力を与えることにより取付バイプ１の外周面に圧接されるように当該折曲部１４を挙動させるものである点が異なる。 Next, a caster mounting structure according to a second embodiment of the present invention will be described with reference to FIGS. 4-6, the same number is attached | subjected about the same thing as the structural member of FIGS. 1-3, and the description is omitted.
The present caster mounting structure is different from the caster mounting structure according to the first embodiment. In the caster mounting structure according to the first embodiment, this is accompanied by the pressing action of the mounting vip 1 on the bent portion 4. Although the bent portion 4 was intended to behave the bent portion 4 so as to be pressed against the outer peripheral surface of the mounting Baipu 1, in this caster mounting structure, the sleeves 13, for example, the bent portion of the sleeve piece 13a 14 by applying a counterclockwise pressing force from the tapered surface of the inner peripheral surface 16b ₁ provided on the fixing nut 16 so that the bent portion 14 is pressed against the outer peripheral surface of the mounting vip 1. The difference is that it is made to behave.

まず、本キャスター取付構造の取付シャフト１２は、上記取付シャフト２に対し、図５に示すように、当該取付シャフト１２のフランジ１２ａの外周面、即ち、フランジ１２ａの鍔部１２ａ_１の外周面に後に詳述する固定ナット１６が螺合するネジ溝が螺刻されている点が異なる。
また、本キャスター取付構造のスリーブ１３は、上記スリーブ３に対し、図６に示すように、スリーブ１３のスリーブ片１３ａ〜１３ｃのうちの、例えばスリーブ片１３ａで言うと、その最下端部に当該最下端部を折り曲げて成形される溝１５や折曲部１４の形態が、スリーブ片３ａの最下端部に当該最下端部を折り曲げて成形される上記溝５や折曲部４の形態とは異なっている。
即ち、例えばスリーブ片１３ａの最下端部に、図６（Ｂ）に示すような、当該最下端部を深目のＵ字状溝１５が形成されるように折り曲げて成形された折曲部１４が設けられ、このようにして設けられた折曲部１４を含む最下端部で形成される上記溝１５の下面１５ａは、上述同様に取付シャフト１２の挿入が完了したときに上記フランジ１２ａの深溝２ｃ_２に当接するようになっている。また、上記溝１５を形成している外周面１５ｂの、当該溝１５の開口口に至る先端面部１５ｂ_１は、この先端面部１５ｂ_１の溝幅が開口口に向かうに従って漸次拡くなるように当該溝１５の内周面１５ｃに対し所定傾斜角のテーパ面で以って形成されている。この結果、固定ナット１６の、取付シャフト１２のネジ溝への螺着に際して当該固定ナット１６が折曲部１４を傾動させるときに、かかる傾動に伴う押圧作用によってこの折曲部１４の先端面部１５ｂ_１が、後に詳述するように取付バイプ１の外周面に圧接されるように挙動する（図４（Ｂ）参照）。但し、本実施の形態においても、この先端面部１５ｂ_１を含む外周面１５ｂには、取付バイプ１の外周面に対し強固に圧接させるべく樹脂部材７が添着されている（図４参照）。 First, the mounting shaft 12 of the caster mounting structure, to the mounting shaft 2, as shown in FIG. 5, the outer peripheral surface of the flange 12a of the mounting shaft 12, i.e., on the outer peripheral surface of the flange portion 12a ₁ of the flange 12a A difference is that a thread groove into which a fixing nut 16 to be described later is screwed is threaded.
Further, sleeves 13 of the caster mounting structure, to the upper kiss leave 3, as shown in FIG. 6, of the sleeve piece 13a~13c the sleeves 13, for example in terms of the sleeve piece 13a, the outermost The form of the groove 15 or the bent portion 14 formed by bending the lower end portion at the lower end portion is the groove 5 or the bent portion 4 formed by bending the lower end portion at the lower end portion of the sleeve piece 3a. The form is different.
That is, for example, a bent portion 14 formed by bending the lowermost end of the sleeve piece 13a so that a deep U-shaped groove 15 is formed as shown in FIG. 6B. The lower surface 15a of the groove 15 formed at the lowermost end portion including the bent portion 14 thus provided is a deep groove of the flange 12a when the insertion of the mounting shaft 12 is completed as described above. 2c ₂ is contacted. Further, the front end surface portion 15b ₁ of the outer peripheral surface 15b forming the groove 15 reaching the opening of the groove 15 has the groove width of the front end surface portion 15b ₁ gradually widened toward the opening. The groove 15 is formed with a taper surface having a predetermined inclination angle with respect to the inner peripheral surface 15c. As a result, when the fixing nut 16 tilts the bent portion 14 when the fixing nut 16 is screwed into the thread groove of the mounting shaft 12, the distal end surface portion 15b of the bent portion 14 is caused by the pressing action accompanying the tilting. ₁ behaves so as to be pressed against the outer peripheral surface of the mounting vip 1 as described in detail later (see FIG. 4B). However, also in this embodiment, the outer peripheral surface 15b including the distal end surface portion 15b _1, the resin member 7 to be firmly pressed against the outer peripheral surface of the mounting Baipu 1 is affixed (see FIG. 4).

また、本キャスター取付構造の固定ナット１６は、図７に示すように、中空円筒部材の、略中央位置から下面に至るところの内壁面に上記取付シャフト１２の鍔部１２ａ_１のネジ溝に螺合するネジ溝１６ａが設けられるとともに、その略中央位置から上面に至るところの、上記ネジ溝１６ａに連設する内壁面には突条１６ｂが設けられ、この突条１６ｂの内周面１６ｂ_１は、この固定ナット１６の、取付シャフト１２のネジ溝への螺合に際して当該固定ナット１６が折曲部１４を効果的に押圧するようにするべくこの上面から略中央位置に向かって中空幅が漸増する所定傾斜角のテーパ面で以って形成されている。尚、固定ナット１６の略中央には凸部１６ｃが突設され、この凸部１６ｃの外周面には、固定ナット１６の把持をし易くするために波状の凹凸加工が施されている。 The fixing nut 16 of the caster mounting structure, as shown in FIG. 7, the hollow cylindrical member, threadedly substantially from the middle position to the screw groove of the flange portion 12a ₁ of the mounting shaft 12 on the inner wall surface of everywhere on the bottom surface A screw groove 16a is provided, and a protrusion 16b is provided on the inner wall surface connected to the screw groove 16a from the substantially central position to the upper surface, and an inner peripheral surface 16b _{1 of the} protrusion 16b. When the fixing nut 16 is screwed into the thread groove of the mounting shaft 12, the fixing nut 16 has a hollow width from the upper surface toward a substantially central position so that the fixing nut 16 effectively presses the bent portion 14. It is formed by a taper surface having a predetermined inclination angle that gradually increases. In addition, a convex portion 16 c is projected substantially at the center of the fixing nut 16, and a corrugated uneven processing is applied to the outer peripheral surface of the convex portion 16 c in order to make it easy to grasp the fixing nut 16.

本キャスター取付構造における取り付けのしかたを図４を参照して説明する。
本キャスター取付構造の取り付けのしかたは、上述した第１の実施形態に係るキャスター取付構造の取り付けのしかたとほぼ同様であるが、取付シャフト１２の折曲部１４を取付バイプ１の外周面に圧接されるように挙動させるさせ方が異なる。
具体的に説明すれば、取付シャフト１２を取付バイプ１に挿入して行くと、図４（Ａ）に示すように、取付バイプ１の端部が、例えばスリーブ片１３ａの溝１５の底面１５ｄに当接してこれを押圧する状態になる。この状態で引き続き挿入して行くと、上記同様に、取付シャフト１２のフランジ１２ａの浅溝２ｃ_１に取付バイプ１の端部が当接する（かかる当接時に金属音が発せられるので、上記完了が認識できる。）とともに、取付シャフト１２のフランジ１２ａの深溝２ｃ_２に、例えばスリーブ片１３ａでは上記溝１５の下面１５ａが当接し、かかる挿入が完了する。しかる後、取付シャフト１２の鍔部１２ａ_１のネジ溝に固定ナット１６のネジ溝１６ａを手動でねじ込んで行く。すると、固定ナット１６の突条１６ｂが、この突条１６ｂのテーパ面で以って、図４（Ｂ）中の矢印で示す方向に折曲部１４を傾動させる。かかる傾動に伴う押圧作用によってこの折曲部１４の先端面部１５ｂ_１は、そのテーパ面が樹脂部材７を介して取付バイプ１の外周面に圧接されるように挙動する（図４（Ｂ）参照）。このとき、この樹脂部材７は、スリーブ片１３ａの折曲部１４が取付バイプ１の外周面に強固に圧接されるのを助長することは上記同様である。これにより、取付シャフト１２の、取付バイプ１への固着をワンタッチで、しかも強固に行えることはもちろんである。 The mounting method in the caster mounting structure will be described with reference to FIG.
The mounting method of the caster mounting structure is substantially the same as the mounting method of the caster mounting structure according to the first embodiment described above, but the bent portion 14 of the mounting shaft 12 is pressed against the outer peripheral surface of the mounting vip 1. How to make it behave differently.
In detail, when we insert the mounting shaft 1 2 into the mounting Baipu 1, as shown in FIG. 4 (A), an end portion of the mounting Baipu 1, for example, the bottom surface 15d of the groove 15 of the sleeve piece 13a It will be in the state which contacts and presses this. As it continues inserted in this state, similarly to the above, since the end portion of the mounting Baipu 1 to shallow 2c ₁ of the flange 12a of the mounting shaft 12 is a metal sound is emitted when abutting to (such abutment, the complete discernible.) along with the deep groove 2c ₂ flanges 12a of the mounting shaft 12, for example, contact with the lower surface 15a of the groove 15 in the sleeve piece 13a comes, such insertion is completed. Thereafter, the screw groove 16a of the flange portion 12a ₁ of the thread groove to the fixing nut 16 of the mounting shaft 12 go manually screwed. Then, the protrusion 16b of the fixing nut 16 tilts the bent portion 14 in the direction indicated by the arrow in FIG. 4 (B) by the tapered surface of the protrusion 16b. Due to the pressing action associated with the tilting, the distal end surface portion 15b ₁ of the bent portion 14 behaves so that its tapered surface is pressed against the outer peripheral surface of the mounting vip 1 via the resin member 7 (see FIG. 4B). ). At this time, the resin member 7 promotes that the bent portion 14 of the sleeve piece 13 a is firmly pressed against the outer peripheral surface of the attachment vip 1 as described above. As a result, the attachment shaft 12 can be firmly fixed to the attachment vip 1 with a single touch.

ところで、取付シャフト１２の鍔部１２ａ_１のネジ溝に固定ナット１６のネジ溝１６ａをねじ込んで行くタイミングについては、上述のように取付シャフト１２の挿入が完了した後である必要はなく、取付シャフト１２の挿入時の適宜なタイミングで固定ナット１６をねじ込んで行ってもよい。 Incidentally, for the timing of the thread groove of the flange portion 12a ₁ of the mounting shaft 12 go screwing the screw groove 16a of the fixing nut 16 need not be after the insertion of the mounting shaft 12 as described above is completed, the mounting shaft The fixing nut 16 may be screwed in at an appropriate timing when the 12 is inserted.

本発明のキャスター取付構造は、台車の取付バイプにキャスターの取付シャフトを固着する取付作業に際して、工具などを使用することなくワンタッチで、しかも、強固に行なえるので、従来のキャスター取付構造に取って代わるべく採用価値の高いものと言える。 Since the caster mounting structure of the present invention can be firmly performed with one touch without using a tool or the like when mounting the caster mounting shaft to the mounting vip of the carriage, the conventional caster mounting structure can be used. It can be said that the value of adoption is as high as possible.

本発明の第１の実施の形態に係るキャスター取付構造の取り付け方の説明図である。It is explanatory drawing of the attachment method of the caster attachment structure concerning the 1st Embodiment of this invention. 図１の取付構造を構成する構成部品のうちの取付シャフトの詳細図である。It is detail drawing of the attachment shaft among the components which comprise the attachment structure of FIG. 図１の取付構造を構成する構成部品のうちのスリーブの詳細図である。It is a detailed view of sleeves of the components constituting the mounting structure of FIG. 本発明の第２の実施の形態に係るキャスター取付構造の取り付け方の説明図である。It is explanatory drawing of the attachment method of the caster attachment structure concerning the 2nd Embodiment of this invention. 図４の取付構造を構成する構成部品のうちの取付シャフトの詳細図である。It is detail drawing of the attachment shaft among the components which comprise the attachment structure of FIG. 図４の取付構造を構成する構成部品のうちのスリーブの詳細図である。It is a detailed view of sleeves of the components constituting the mounting structure of FIG. 図４の取付構造を構成する構成部品のうちの固定ナットの詳細図である。It is detail drawing of the fixing nut among the components which comprise the attachment structure of FIG. 従来のキャスター取付構造の取り付け方の説明図である。It is explanatory drawing of the attachment method of the conventional caster attachment structure.

１取付バイプ
２，１２取付シャフト
２ａ上軸部（軸部）
２ａ_１突条
２ｂ，１２ａフランジ
２ｃ_１浅溝（フランジの凸底面）
２ｃ_２深溝（フランジの凹底面）
３，１３スリーブ
３ａ〜３ｃスリーブ片
３ａ_１突起
４，１４折曲部
７樹脂部材
８弾性部材
１２ａ_１鍔部
１３ａ〜１３ｃスリーブ片
１６固定ナット
１６ａネジ溝
１６ｂ突条
１６ｂ_１内周面
1 mounting vip 2,12 mounting shaft 2a upper shaft (shaft)
2a ₁ protrusion 2b, 12a flange 2c ₁ shallow groove (convex bottom surface of flange)
2c ₂ deep groove (concave bottom of flange)
3, 13 sleeves 3a to 3c sleeve pieces 3a ₁ protrusions 4, 14 bent portions 7 resin members 8 elastic members 12a ₁ flange portions 13a to 13c sleeve pieces 16 fixing nuts 16a screw grooves 16b ridges 16b ₁ inner peripheral surfaces

Claims

A caster mounting structure for securing a mounting shaft of a caster of the cart to a mounting vip provided at a lower portion of the cart, and a protrusion having a predetermined shape is formed on the outer peripheral surface of the shaft portion to be inserted into the mounting vip. And a flange having a convex bottom as a contact portion with which the end of the mounting vip abuts when the insertion into the mounting vip is completed below the shaft portion. The mounting shaft is provided, and the outer periphery of the mounting shaft is composed of a plurality of divided sleeve pieces that are mounted along the axial direction. The inner peripheral surface of the sleeve pieces is inserted with the mounting shaft. When the insertion of the mounting shaft is completed, the lower end of each of the sleeve pieces abuts against the concave bottom surface of the flange. In addition, the bent portion of the lowermost end is pressed against the outer peripheral surface of the mounting vip with the pressing action of the mounting vip on the bent portion formed at the lowermost end, and at the same time, the flange of the flange A sleeve that behaves as guided by a portion and an outer peripheral position that is back-to-back with the protruding portion of the sleeve, and when the insertion of the mounting shaft is completed, the sleeve is appropriately A caster mounting structure comprising an elastic member that is elastically deformed.

A caster mounting structure for securing a mounting shaft of a caster of the cart to a mounting vip provided at a lower portion of the cart, and a protrusion having a predetermined shape is formed on the outer peripheral surface of the shaft portion to be inserted into the mounting vip. A plurality of flanges are provided at a predetermined interval along the shaft, and a flange having a convex bottom as a contact portion with which an end of the mounting vip contacts when the insertion into the mounting vip is completed below the shaft portion. And further comprising the mounting shaft having a thread groove threaded on the outer peripheral surface of the flange, and a plurality of sleeve pieces that are mounted along the axial direction on the outer periphery of the mounting shaft. On the inner peripheral surface of the sleeve pieces, there are provided protrusions that face the protrusions when the insertion of the attachment shaft is completed, and the lowermost ends of these sleeve pieces are the attachment shafts. When the insertion is completed, the taper surface provided on the fixing nut that comes into contact with the concave bottom surface of the flange and is screwed into the thread groove is pressed against the bent portion formed at the lowermost end portion. A sleeve that behaves so that the bent portion at the lowermost end is pressed against the outer peripheral surface of the mounting vip, and an outer peripheral surface that is back-to-back with the protruding portion of the sleeve, and is inserted into the mounting shaft. A caster mounting structure comprising: an elastic member that is appropriately elastically deformed with the mounting vip when the step is completed.

The caster mounting structure according to claim 1 or 2, wherein a resin member is attached to the bent portion so as to strengthen pressure contact with an outer peripheral surface of the mounting vip.