JP5531039B2

JP5531039B2 - Wheel mounting structure

Info

Publication number: JP5531039B2
Application number: JP2012038244A
Authority: JP
Inventors: 耕太雄島
Original assignee: Yuei Caster Co Ltd
Current assignee: Yuei Caster Co Ltd
Priority date: 2012-02-24
Filing date: 2012-02-24
Publication date: 2014-06-25
Anticipated expiration: 2032-02-24
Also published as: JP2013173414A

Description

本発明は、車輪取付構造体に関する。 The present invention relates to a wheel mounting structure.

従来、台車の四隅に立設した脚柱パイプの下端に取付部材を介して車輪を取り付けることのできる台車への車輪取付構造体が提案されている（特許文献１参照）。 2. Description of the Related Art Conventionally, there has been proposed a wheel attachment structure for a carriage that can attach a wheel to a lower end of a pedestal pipe erected on four corners of the carriage via an attachment member (see Patent Document 1).

特開平９−５６５１１号公報JP-A-9-56511

従来の車輪取付構造体は、脚柱パイプの下端開口部に車輪取付用のソケットを挿入固定し、このソケットの貫通孔に取付部材を挿通して、車輪を取り付けるものであって、ソケットの凹周溝に外嵌したＯリングと脚柱パイプ内周面との摩擦力をもって、取付部材が脚柱パイプの下端に保持されていた。しかし、脚柱パイプは、製造工程にて寸法精度を保つのが難しく、その内径に比較的大きな寸法公差が生じているため、Ｏリングの弾性をもって脚柱パイプの内径公差を吸収しようとするには無理があった。従って、脚柱パイプの内径寸法公差が大きい場合には、ソケットの保持力が弱くなり、脚柱パイプから取付部材が抜け落ちる虞れがあった。 In the conventional wheel mounting structure, a wheel mounting socket is inserted and fixed in a lower end opening of a pedestal pipe, and a mounting member is inserted into a through hole of the socket to mount a wheel. The attachment member was held at the lower end of the pedestal pipe by the frictional force between the O-ring externally fitted in the circumferential groove and the inner peripheral surface of the pedestal pipe. However, it is difficult to maintain the dimensional accuracy of the pedestal pipe in the manufacturing process, and there is a relatively large dimensional tolerance in the inner diameter. Therefore, the inner diameter tolerance of the pedestal pipe is absorbed by the elasticity of the O-ring. Was impossible. Therefore, when the inner diameter dimensional tolerance of the pedestal pipe is large, the holding force of the socket is weakened, and there is a possibility that the mounting member falls off from the pedestal pipe.

また、車輪の方向と台車の走行方向が一致した状態に保持する必要がある場合に、車輪回動規制部材としてのブラケットを使用しなければならず、組立ての作業が面倒で、しかも、余計な部品が増えるため製造コストが高くなるという欠点があった。また、脚柱パイプの内径寸法公差により、車輪のガタつきは避けられず、台車が安定して走行できないという欠点があった。 In addition, when it is necessary to keep the direction of the wheel and the traveling direction of the carriage coincident with each other, a bracket as a wheel rotation restricting member must be used, which makes the assembly work cumbersome and unnecessary. There is a drawback that the manufacturing cost is increased due to the increased number of parts. Further, due to the tolerance of the inner diameter of the pedestal pipe, rattling of the wheel is unavoidable, and there is a drawback that the carriage cannot travel stably.

そこで、本発明は、簡素な構造ながらパイプ状脚柱の下端に車輪を確実に取り付けることのできる車輪取付構造体を提供することを目的とする。 Then, an object of this invention is to provide the wheel attachment structure which can attach a wheel reliably to the lower end of a pipe-shaped pedestal with a simple structure.

本発明に係る車輪取付構造体は、移動枠体のパイプ状脚柱の下端に車輪保持用の本体フレームを介して車輪を取り付ける車輪取付構造体に於て、上記本体フレームに貫設した孔部にボルト部材を下方から挿通し、該本体フレームの上方に突き出た該ボルト部材の軸棒に、ワッシャを取付けると共に圧縮拡径可能な円筒部材を外嵌し、さらに、該円筒部材の上からナット部材を螺着し、上記円筒部材を上記パイプ状脚柱の下端開口部に差込み、上記ボルト部材と上記ナット部材によって該円筒部材を上下方向に圧縮し径方向に膨張させ上記パイプ状脚柱の内周面に圧接させて、上記本体フレームを上記パイプ状脚柱に保持させるように構成し、上記パイプ状脚柱の上記下端開口部の周端縁に切欠部が形成され、かつ、上記本体フレームに上方突出状の起立片が形成され、上記本体フレームの上記円筒部材を上記パイプ状脚柱の上記下端開口部に差込んで保持させた状態に於て、上記起立片を上記切欠部に係止させて上記本体フレームと上記パイプ状脚柱の相対回動を阻止するように構成したものである。 A wheel mounting structure according to the present invention is a wheel mounting structure in which a wheel is attached to a lower end of a pipe-like pedestal of a moving frame body via a wheel holding main body frame. A bolt member is inserted into the shaft from below, a cylindrical member capable of compressing and expanding is attached to a shaft rod of the bolt member protruding upward from the main body frame, and a nut from above the cylindrical member. The member is screwed, the cylindrical member is inserted into the lower end opening of the pipe-shaped pedestal, the cylindrical member is compressed in the vertical direction by the bolt member and the nut member, and is expanded in the radial direction, and the pipe-shaped pedestal is expanded. The main body frame is configured to be held in pressure contact with an inner peripheral surface and held by the pipe-like pedestal, a notch is formed at a peripheral edge of the lower end opening of the pipe-like pedestal, and the main body Projected upward into the frame In the state where the cylindrical member of the main body frame is inserted and held in the lower end opening of the pipe-like pedestal, the standing piece is locked to the notch. The main body frame and the pipe-like pedestal are configured to prevent relative rotation .

また、上記ワッシャに、上記起立片に係止するための凹溝部が形成されているものである。
また、上記パイプ状脚柱は、上記下端開口部の上記周端縁が上記本体フレームに当接しているものである。 Also, in the washer, in which groove portions for locking to the standing piece is formed.
The pipe-like pedestal is such that the peripheral edge of the lower end opening is in contact with the main body frame.

本発明の車輪取付構造体によれば、ボルト部材とナット部材にて円筒部材を圧縮拡径させて、パイプ状脚柱の内周面に確実に圧接させることができ、本体フレームをパイプ状脚柱に強い保持力をもって確実に取り付けることができる。また、本体フレームの下方に露出したボルト部材のヘッドを回してナット部材を容易に締め付けたり緩めたりできるため、組立ての作業が簡単で、特別な工具がなくても車輪の取付け取外しができる。 According to the wheel mounting structure of the present invention, the cylindrical member can be compressed and expanded by the bolt member and the nut member, and can be surely brought into pressure contact with the inner peripheral surface of the pipe-like pedestal. It can be securely attached to the pillar with a strong holding force. In addition, since the nut member can be easily tightened or loosened by turning the head of the bolt member exposed below the main body frame, the assembling work is simple and the wheels can be attached and detached without any special tools.

本発明の実施の一形態を示した断面正面図である。It is the section front view showing one embodiment of the present invention. 車輪取付構造体を示した断面平面図である。It is the cross-sectional top view which showed the wheel attachment structure. 車輪取付構造体を示した断面側面図である。It is the cross-sectional side view which showed the wheel attachment structure. 本発明の他の実施形態を示した断面正面図である。It is the cross-sectional front view which showed other embodiment of this invention. 他の実施形態を示した断面平面図である。It is the cross-sectional top view which showed other embodiment. 他の実施形態を示した断面正面図である。It is the cross-sectional front view which showed other embodiment. 本発明の車輪取付構造体の変形例を示した断面正面図である。It is the cross-sectional front view which showed the modification of the wheel attachment structure of this invention.

以下、実施の形態を示す図面に基づき本発明を詳説する。
本発明の車輪取付構造体は、移動枠体として、例えば、台車や作業台、ワゴン、黒板、ホワイトボード、パソコン台、あるいは、デジタル機器の棚等に固着されたパイプ状脚柱の下端に車輪を取り付けるための車輪取付構造体である。
図１と図３、図４に示すように、本発明の車輪取付構造体は、移動枠体のパイプ状脚柱３の下端に車輪保持用の本体フレーム１を介して車輪２を取り付ける車輪取付構造体に於て、本体フレーム１に貫設した孔部１０にボルト部材６を下方から挿通し、本体フレーム１の上方に突き出たボルト部材６の軸棒１２に、ワッシャ８を取付けると共に圧縮拡径可能な円筒部材５を外嵌し、さらに、円筒部材５の上からナット部材７を螺着している。以上の構成から成る車輪取付構造体は、円筒部材５をパイプ状脚柱３の下端開口部１３に差込み、ボルト部材６とナット部材７によって円筒部材５を上下方向に圧縮し径方向に膨張させパイプ状脚柱３の内周面３ａに圧接させて、本体フレーム１をパイプ状脚柱３に保持させている。 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
The wheel mounting structure of the present invention is a moving frame, for example, a wheel at the lower end of a pipe-like pedestal fixed to a carriage, work bench, wagon, blackboard, whiteboard, PC board, digital equipment shelf, or the like. It is a wheel mounting structure for mounting.
As shown in FIGS. 1, 3, and 4, the wheel mounting structure of the present invention is a wheel mounting in which a wheel 2 is mounted on a lower end of a pipe-like pedestal 3 of a moving frame via a wheel holding main body frame 1. In the structure, a bolt member 6 is inserted from below into a hole 10 penetrating the main body frame 1, and a washer 8 is attached to a shaft rod 12 of the bolt member 6 protruding above the main body frame 1 and compressed and expanded. A cylindrical member 5 capable of diameter fitting is externally fitted, and a nut member 7 is screwed onto the cylindrical member 5. In the wheel mounting structure configured as described above, the cylindrical member 5 is inserted into the lower end opening 13 of the pipe-like pedestal 3, and the cylindrical member 5 is compressed in the vertical direction by the bolt member 6 and the nut member 7 to expand in the radial direction. The main body frame 1 is held by the pipe-like leg column 3 while being pressed against the inner peripheral surface 3 a of the pipe-like leg column 3.

図１〜図３に示す車輪取付構造体では、パイプ状脚柱３の下端開口部１３の周端縁１３ａに切欠部４が形成され、かつ、本体フレーム１に上方突出状の起立片９が形成されている。本体フレーム１の円筒部材５をパイプ状脚柱３の下端開口部１３に差込んで保持させた状態に於て、起立片９を切欠部４に係止させて本体フレーム１とパイプ状脚柱３の相対回動を阻止するように構成されている。
本体フレーム１は、板金塑性加工により製造され、上枠１１の両端に一対の側枠１Ａ，１Ａを備え、断面倒立Ｕ字状に形成されている。本体フレーム１は、一対の側枠１Ａ，１Ａ間に軸を通して、転動軸心Ｌ_０廻りに回転自在に車輪２を保持している。なお、図１では、パイプ状脚柱３のパイプ軸心Ｐに対して、車輪２の転動軸心Ｌ_０が偏心して設けられており、言い換えると、パイプ軸心Ｐと転動軸心Ｌ_０が相互に交差しないねじれの位置に配設されている。図１に示す起立片９は、本体フレーム１の上枠１１の一部を上向きに***させて、断面三角山形状に形成されている。 In the wheel mounting structure shown in FIGS. 1 to 3, the notch 4 is formed in the peripheral edge 13 a of the lower end opening 13 of the pipe-like pedestal 3, and the upward protruding protruding piece 9 is formed on the main body frame 1. Is formed. In a state in which the cylindrical member 5 of the main body frame 1 is inserted and held in the lower end opening 13 of the pipe-like pedestal 3, the upright piece 9 is engaged with the notch 4, and the main body frame 1 and the pipe-like pedestal are 3 is configured to prevent relative rotation.
The main body frame 1 is manufactured by sheet metal plastic working and includes a pair of side frames 1A and 1A at both ends of the upper frame 11, and is formed in an inverted U-shaped cross section. Body frame 1, a pair of side frames 1A, through the shaft between 1A, rotatably holds the wheels 2 to Utatedojikukokoro L ₀ around. In FIG. 1, the rolling axis L ₀ of the wheel 2 is provided eccentrically with respect to the pipe axis P of the pipe-like pedestal 3. In other words, the pipe axis P and the rolling axis L are provided. _{The zeros} are arranged at twist positions that do not cross each other. The standing piece 9 shown in FIG. 1 is formed in a triangular mountain shape in cross section by raising a part of the upper frame 11 of the main body frame 1 upward.

パイプ状脚柱３は、金属製の丸パイプ、又は、金属と合成樹脂を組み合わせた複合型の丸パイプから成る。切欠部４は、下端開口部１３の周端縁１３ａを矩形状に切欠いて形成され、その幅寸法が起立片９の幅寸法とほぼ同一に設定されている。つまり、起立片９が切欠部４に係止した状態では、パイプ状脚柱３の周方向にほとんど遊びがなく、本体フレーム１をガタつかせることなくパイプ状脚柱３に保持することができる。
円筒部材５は、弾性変形可能であって、上下方向から圧縮力を加えることで径方向に膨張するように構成されている。円筒部材５の材料としては、ゴムやプラスチックを用いるのが望ましい。円筒部材５は、ワッシャ８を介して本体フレーム１に載置されると共に、ボルト部材６の軸棒１２に外嵌状に取付けられて、その上からナット部材７にて抜止めされている。
ナット部材７は、パイプ状脚柱３に挿入可能な円盤形状であって、中央部に設けた孔部に、ボルト部材６の軸棒１２に螺合する雌ネジを形成している。なお、ナット部材７の外周面は、円周面状であり、一般的なナットに設けられている締付用の六角面は形成されないのが好ましい。 The pipe-like pedestal 3 is made of a metal round pipe or a composite round pipe in which a metal and a synthetic resin are combined. The notch 4 is formed by cutting the peripheral edge 13 a of the lower end opening 13 into a rectangular shape, and the width dimension thereof is set to be substantially the same as the width dimension of the upright piece 9. That is, in a state where the upright piece 9 is locked to the notch portion 4, there is almost no play in the circumferential direction of the pipe-shaped leg column 3, and the main frame 1 can be held on the pipe-shaped leg column 3 without rattling. .
The cylindrical member 5 can be elastically deformed, and is configured to expand in the radial direction by applying a compressive force from above and below. As the material of the cylindrical member 5, it is desirable to use rubber or plastic. The cylindrical member 5 is mounted on the main body frame 1 via a washer 8 and is attached to the shaft rod 12 of the bolt member 6 so as to be fitted outside, and is secured by a nut member 7 from above.
The nut member 7 has a disk shape that can be inserted into the pipe-shaped pedestal 3, and a female screw that is screwed into the shaft rod 12 of the bolt member 6 is formed in a hole provided in the center portion. In addition, it is preferable that the outer peripheral surface of the nut member 7 is a circumferential surface shape, and the hexagonal surface for fastening provided in the general nut is not formed.

図２では、ワッシャ８に、起立片９に係止するための凹溝部１８が形成されている。
ワッシャ８は、パイプ状脚柱３に挿入可能な略円盤形状に形成されている。凹溝部１８は、ワッシャ８の外周面の一部を切欠いて形成されている。起立片９が凹溝部１８に係止した状態では、本体フレーム１に対するワッシャ８の回動が規制され、ボルト部材６を回した際に、円筒部材５が共廻りするのを抑制している。 In FIG. 2, the washer 8 is formed with a concave groove 18 for locking to the upright piece 9.
The washer 8 is formed in a substantially disk shape that can be inserted into the pipe-like pedestal 3. The recessed groove portion 18 is formed by cutting out a part of the outer peripheral surface of the washer 8. In a state where the upright piece 9 is locked to the concave groove portion 18, the rotation of the washer 8 with respect to the main body frame 1 is restricted, and when the bolt member 6 is turned, the cylindrical member 5 is prevented from rotating together.

図１と図３に示すように、パイプ状脚柱３は、下端開口部１３の周端縁１３ａが本体フレーム１に当接している。
本体フレーム１の円筒部材５をパイプ状脚柱３の下端開口部１３に差込んで保持させた状態に於て、起立片９が切欠部４に嵌込まれ、かつ、本体フレーム１側に取付けられたワッシャ８、円筒部材５、及び、ナット部材７が、パイプ状脚柱３の下端開口部１３内に挿入されて収納されている。この構成により、パイプ状脚柱３は、本体フレーム１により直接に支持され、移動枠体の荷重を確実に受け持つことが可能となっている。 As shown in FIGS. 1 and 3, the pipe-like pedestal 3 has the peripheral edge 13 a of the lower end opening 13 in contact with the main body frame 1.
In a state where the cylindrical member 5 of the main body frame 1 is inserted and held in the lower end opening 13 of the pipe-like pedestal 3, the upright piece 9 is fitted into the notch portion 4 and attached to the main body frame 1 side. The washer 8, the cylindrical member 5, and the nut member 7 are inserted into the lower end opening 13 of the pipe-like pedestal 3 and stored. With this configuration, the pipe-like pedestal 3 is directly supported by the main body frame 1 and can reliably handle the load of the movable frame body.

上述した本発明の車輪取付構造体の使用方法（作用）について説明する。
図１に示すように、本体フレーム１の円筒部材５をパイプ状脚柱３の下端開口部１３に差込んで、本体フレーム１の下方からネジ廻し又は六角レンチ等を入れてボルト部材６を回し、ナット部材７を締付ける方向に螺進させて、円筒部材５を上下方向に圧縮する。円筒部材５は、圧縮されることで（弾性変形しつつ）拡径し、押圧力Ｆをもってパイプ状脚柱３の内周面３ａに圧接する。この際、起立片９が凹溝部１８に係止してワッシャ８の回動が規制され、円筒部材５がボルト部材６と共廻りするのを抑制され、ナット部材７が確実に締付けられる。 The use method (action) of the wheel mounting structure of the present invention described above will be described.
As shown in FIG. 1, the cylindrical member 5 of the main body frame 1 is inserted into the lower end opening 13 of the pipe-like pedestal 3, and a screw member or a hexagon wrench is inserted from below the main body frame 1 to turn the bolt member 6. Then, the nut member 7 is screwed in the tightening direction to compress the cylindrical member 5 in the vertical direction. The cylindrical member 5 expands in diameter by being compressed (while being elastically deformed), and comes into pressure contact with the inner peripheral surface 3a of the pipe-like leg column 3 with a pressing force F. At this time, the upright piece 9 is locked to the concave groove portion 18 and the rotation of the washer 8 is restricted, the cylindrical member 5 is prevented from rotating together with the bolt member 6, and the nut member 7 is securely tightened.

本体フレーム１の起立片９をパイプ状脚柱３の切欠部４に係合させ、かつ、円筒部材５がパイプ状脚柱３の下端開口部１３に差込まれて（弾性的に）内周面３ａに圧接して、本体フレーム１とパイプ状脚柱３の相対的な回動を阻止しつつ抜け落ちてしまわないように保持される。本体フレーム１に軸支された車輪２は、移動枠体の走行方向Ｓに転動軸心Ｌ_０が直交する。言い換えると、車輪２の向きが移動枠体の走行方向Ｓに常に一致した状態で保持される。また、円筒部材５がパイプ状脚柱３の内径公差を吸収して内周面３ａに隙間なく圧接して、しかも、パイプ状脚柱３の下端開口部１３の周端縁１３ａが本体フレーム１に当接して支持されているので、本体フレーム１とパイプ状脚柱３がガタつくことなく安定して強固に支持される。 The upright piece 9 of the main body frame 1 is engaged with the cutout portion 4 of the pipe-like pedestal 3, and the cylindrical member 5 is inserted into the lower end opening 13 of the pipe-like pedestal 3 (elastically). It is held in contact with the surface 3a so as not to fall off while preventing relative rotation of the main body frame 1 and the pipe-like pedestal 3. The wheel 2 that is pivotally supported by the main body frame 1 has the rolling axis L ₀ orthogonal to the traveling direction S of the moving frame. In other words, the direction of the wheels 2 is held in a state where it always coincides with the traveling direction S of the moving frame. Further, the cylindrical member 5 absorbs the inner diameter tolerance of the pipe-shaped leg column 3 and presses against the inner peripheral surface 3a without a gap, and the peripheral edge 13a of the lower end opening 13 of the pipe-shaped leg column 3 is the main body frame 1. The main body frame 1 and the pipe-like pedestal 3 are stably and firmly supported without rattling.

次に、本発明の他の実施形態について説明する。
図４〜図６に示す車輪取付構造体に於て、車輪２を保持するための本体フレーム１に貫設した孔部１０にボルト部材６を下方から挿通し、本体フレーム１の上方に突き出たボルト部材６の軸棒１２に、圧縮拡径可能な円筒部材５を外嵌し、さらに、円筒部材５の上からナット部材７を螺着し、円筒部材５をパイプ状脚柱３の下端開口部１３に差込み、ボルト部材６とナット部材７によって円筒部材５を上下方向に圧縮し径方向に膨張させパイプ状脚柱３の内周面３ａに圧接させて、本体フレーム１をパイプ状脚柱３に保持させている点で、上述の実施の形態と同様である。
相違する点は、本体フレーム１にボルト部材６を通すための孔部１０を取り囲むように、上枠１１の上下両面１１Ａ，１１Ｂに複数のボール１５，１６を配設し、かつ、このボール１５，１６を転動自在として上受け盤１４と下受け盤１７にて挟み込んでいる。上受け盤１４と下受け盤１７との間には、小径ワッシャ１９が介設されている。つまり、図４〜図６では、本体フレーム１に、複数のボール１５，１６と上受け盤１４・下受け盤１７及び小径ワッシャ１９から成るスラストボールベアリング機構２０が設けられ、パイプ状脚柱３に対して本体フレーム１が回動自在に取付けられている。 Next, another embodiment of the present invention will be described.
In the wheel mounting structure shown in FIGS. 4 to 6, the bolt member 6 is inserted from below into the hole 10 formed in the main body frame 1 for holding the wheel 2 and protrudes above the main body frame 1. A cylindrical member 5 that can be compressed and expanded is externally fitted to the shaft rod 12 of the bolt member 6, and a nut member 7 is screwed from above the cylindrical member 5, and the cylindrical member 5 is opened at the lower end of the pipe-like pedestal 3. The cylindrical member 5 is compressed in the vertical direction by the bolt member 6 and the nut member 7 and expanded in the radial direction by the bolt member 6 and the nut member 7 so as to be in pressure contact with the inner peripheral surface 3a of the pipe-like leg column 3, so that the main body frame 1 is connected to the pipe-like leg column. 3 is the same as that of the above-described embodiment.
The difference is that a plurality of balls 15 and 16 are arranged on the upper and lower surfaces 11A and 11B of the upper frame 11 so as to surround the hole 10 for passing the bolt member 6 through the main body frame 1, and this ball 15 , 16 are sandwiched between the upper receiving plate 14 and the lower receiving plate 17 so that they can roll. A small-diameter washer 19 is interposed between the upper receiving plate 14 and the lower receiving plate 17. That is, in FIGS. 4 to 6, the main body frame 1 is provided with a thrust ball bearing mechanism 20 including a plurality of balls 15, 16, an upper receiving plate 14, a lower receiving plate 17, and a small-diameter washer 19. A main body frame 1 is attached to be rotatable.

図４に於て、本体フレーム１の上受け盤１４の上方に突き出たボルト部材６の軸棒１２に、第１受け盤２１と第２受け盤２２が取付けられ、その上から（凹溝部の無い）ワッシャ２８が取付けられて、さらに、その上方から円筒部材５とナット部材７が取り付けられている。パイプ状脚柱３は、その下端開口部１３の周端縁１３ａが第２受け盤２２に当接して支持されている。なお、この場合、ワッシャ２８は省略しても良い。 In FIG. 4, a first receiving plate 21 and a second receiving plate 22 are attached to the shaft rod 12 of the bolt member 6 protruding above the upper receiving plate 14 of the main body frame 1. The washer 28 is attached, and the cylindrical member 5 and the nut member 7 are attached from above. The pipe-like pedestal 3 is supported with the peripheral edge 13 a of the lower end opening 13 abutting against the second receiving plate 22. In this case, the washer 28 may be omitted.

図６に示すように、円筒部材５を圧縮して押圧力Ｆを発揮させた状態下で、ボルト部材６の締付力Ｎ_１によってボール１５，１６の転動を阻害しないように構成されている。ボルト部材６の締付力Ｎ_１は、下受け盤１７から小径ワッシャ１９、上受け盤１４、第１受け盤２１、第２受け盤２２、そして、ワッシャ２８へ、何れもボルト部材６の軸棒１２近傍の狭い範囲で伝達する。つまり、上受け盤１４と下受け盤１７の間には、小径ワッシャ１９を挟圧するように締付力Ｎ_１が作用するが、ボール１５，１６を組み込んだ部位には締付力Ｎ_１が伝達しない。こうして、本体フレーム１は、上枠１１とボルト部材６の相対回転を可能としつつ、ボルト部材６とナット部材７の締付力Ｎ_１，Ｎ_２により円筒部材５を圧縮して、本体フレーム１をパイプ状脚柱３に回動自在に保持させている。 As shown in FIG. 6, the rolling of the balls 15 and 16 is not hindered by the tightening force N ₁ of the bolt member 6 under the condition that the cylindrical member 5 is compressed and exerts the pressing force F. Yes. The tightening force N ₁ of the bolt member 6 is transferred from the lower receiving plate 17 to the small diameter washer 19, the upper receiving plate 14, the first receiving plate 21, the second receiving plate 22, and the washer 28. Transmission is performed in a narrow range near the bar 12. That is, between the upper receiving plate 14 and the lower receiving plate 17, but clamping forces N ₁ as pressed between the small-diameter washer 19 acts, parts incorporating ball 15, 16 tightening force N ₁ Do not communicate. In this way, the main body frame 1 compresses the cylindrical member 5 by the tightening forces N ₁ and N ₂ of the bolt member 6 and the nut member 7 while allowing the upper frame 11 and the bolt member 6 to rotate relative to each other. Is rotatably held on the pipe-like pedestal 3.

なお、本発明は、設計変更可能であって、例えば、本体フレーム１は、パイプ状脚柱３の下方位置に、車輪２が配設され、パイプ軸心Ｐと転動軸心Ｌ_０が直交するように構成されていても良い。
また、図７に示すように、起立片９は、片持ち片状として一端が切り離されていても良い。 The present invention provides a possible design changes, for example, the main body frame 1, a lower position of the tubular pillar 3, the wheel 2 is arranged, the pipe axis P and the rolling axis L ₀ is orthogonal It may be configured to.
Moreover, as shown in FIG. 7, the standing piece 9 may be cut off at one end as a cantilever piece.

以上のように、本発明に係る車輪取付構造体は、移動枠体のパイプ状脚柱３の下端に車輪保持用の本体フレーム１を介して車輪２を取り付ける車輪取付構造体に於て、本体フレーム１に貫設した孔部１０にボルト部材６を下方から挿通し、本体フレーム１の上方に突き出たボルト部材６の軸棒１２に、ワッシャ８を取付けると共に圧縮拡径可能な円筒部材５を外嵌し、さらに、円筒部材５の上からナット部材７を螺着し、円筒部材５をパイプ状脚柱３の下端開口部１３に差込み、ボルト部材６とナット部材７によって円筒部材５を上下方向に圧縮し径方向に膨張させパイプ状脚柱３の内周面３ａに圧接させて、本体フレーム１をパイプ状脚柱３に保持させるように構成したので、ボルト部材６とナット部材７にて円筒部材５を圧縮拡径させて、パイプ状脚柱３の内周面３ａに確実に圧接させることができ、本体フレーム１をパイプ状脚柱３に強い保持力をもって確実に取り付けることができる。また、本体フレーム１の下方に露出したボルト部材６のヘッドを回してナット部材７を容易に締め付けたり緩めたりできるため、組立ての作業が簡単で、特別な工具がなくても車輪２の取付け取外しができる。 As described above, the wheel mounting structure according to the present invention is a wheel mounting structure in which the wheel 2 is attached to the lower end of the pipe-like pedestal 3 of the moving frame via the wheel holding main body frame 1. A bolt member 6 is inserted from below into a hole 10 penetrating into the frame 1, and a washer 8 is attached to a shaft rod 12 of the bolt member 6 protruding above the main body frame 1, and a cylindrical member 5 that can be compressed and expanded is provided. Further, the nut member 7 is screwed from above the cylindrical member 5, the cylindrical member 5 is inserted into the lower end opening 13 of the pipe-like pedestal 3, and the cylindrical member 5 is moved up and down by the bolt member 6 and the nut member 7. Since the main body frame 1 is held by the pipe-like pedestal 3 by compressing in the direction and expanding in the radial direction and press-contacting with the inner peripheral surface 3a of the pipe-like pedestal 3, the bolt member 6 and the nut member 7 The cylindrical member 5 is compressed and expanded The inner peripheral surface 3a of the tubular pillar 3 can be reliably pressed can reliably attached to have a strong hold the body frame 1 a pipe-shaped pedestal 3. Further, since the nut member 7 can be easily tightened or loosened by turning the head of the bolt member 6 exposed below the main body frame 1, the assembling work is simple and the wheel 2 can be attached and detached without a special tool. Can do.

また、パイプ状脚柱３の下端開口部１３の周端縁１３ａに切欠部４が形成され、かつ、本体フレーム１に上方突出状の起立片９が形成され、本体フレーム１の円筒部材５をパイプ状脚柱３の下端開口部１３に差込んで保持させた状態に於て、起立片９を切欠部４に係止させて本体フレーム１とパイプ状脚柱３の相対回動を阻止するように構成したので、起立片９と切欠部４が確実に係合して、パイプ状脚柱３に対して本体フレーム１が相対的に回動するのを防止でき、車輪２が安定して移動枠体の走行方向Ｓを向くように固定できる。 In addition, a notch 4 is formed in the peripheral edge 13 a of the lower end opening 13 of the pipe-like pedestal 3, and an upright protruding piece 9 is formed in the main body frame 1, so that the cylindrical member 5 of the main body frame 1 is attached. In the state of being inserted and held in the lower end opening 13 of the pipe-like pedestal 3, the upright piece 9 is engaged with the notch 4 to prevent relative rotation between the main body frame 1 and the pipe-like pedestal 3. Thus, the upright piece 9 and the notch 4 can be reliably engaged to prevent the main body frame 1 from rotating relative to the pipe-like pedestal 3, and the wheel 2 can be stabilized. The moving frame can be fixed so as to face the traveling direction S.

また、ワッシャ８に、起立片９に係止するための凹溝部１８が形成されているので、ワッシャ８の回動が規制され、円筒部材５がボルト部材６と共廻りするのを抑制でき、ナット部材７を確実に締付ることができる。 Further, since the concave groove portion 18 for locking the upright piece 9 is formed in the washer 8, the rotation of the washer 8 is restricted, and the cylindrical member 5 can be prevented from rotating together with the bolt member 6, The nut member 7 can be securely tightened.

また、パイプ状脚柱３は、下端開口部１３の周端縁１３ａが本体フレーム１に当接しているので、本体フレーム１とパイプ状脚柱３がガタつくことなく安定して保持され、かつ、強固に支持できる。 Moreover, since the peripheral edge 13a of the lower end opening part 13 is in contact with the main body frame 1, the pipe-like leg pillar 3 is stably held without rattling, and Can be supported firmly.

１本体フレーム
２車輪
３パイプ状脚柱
３ａ内周面
４切欠部
５円筒部材
６ボルト部材
７ナット部材
８ワッシャ
９起立片
１０孔部
１２軸棒
１３下端開口部
１３ａ周端縁
１８凹溝部 DESCRIPTION OF SYMBOLS 1 Main body frame 2 Wheel 3 Pipe-shaped leg 3a Inner peripheral surface 4 Notch part 5 Cylindrical member 6 Bolt member 7 Nut member 8 Washer 9 Standing piece 10 Hole part 12 Shaft bar 13 Lower end opening part 13a Circumferential edge 18 Concave groove part

Claims

移動枠体のパイプ状脚柱（３）の下端に車輪保持用の本体フレーム（１）を介して車輪（２）を取り付ける車輪取付構造体に於て、
上記本体フレーム（１）に貫設した孔部（１０）にボルト部材（６）を下方から挿通し、該本体フレーム（１）の上方に突き出た該ボルト部材（６）の軸棒（１２）に、ワッシャ（８）を取付けると共に圧縮拡径可能な円筒部材（５）を外嵌し、さらに、該円筒部材（５）の上からナット部材（７）を螺着し、
上記円筒部材（５）を上記パイプ状脚柱（３）の下端開口部（１３）に差込み、上記ボルト部材（６）と上記ナット部材（７）によって該円筒部材（５）を上下方向に圧縮し径方向に膨張させ上記パイプ状脚柱（３）の内周面（３ａ）に圧接させて、上記本体フレーム（１）を上記パイプ状脚柱（３）に保持させるように構成し、
上記パイプ状脚柱（３）の上記下端開口部（１３）の周端縁（１３ａ）に切欠部（４）が形成され、かつ、上記本体フレーム（１）に上方突出状の起立片（９）が形成され、上記本体フレーム（１）の上記円筒部材（５）を上記パイプ状脚柱（３）の上記下端開口部（１３）に差込んで保持させた状態に於て、上記起立片（９）を上記切欠部（４）に係止させて上記本体フレーム（１）と上記パイプ状脚柱（３）の相対回動を阻止するように構成したことを特徴とする車輪取付構造体。 In a wheel mounting structure for attaching a wheel (2) to a lower end of a pipe-like pedestal (3) of a moving frame body via a body frame (1) for holding a wheel,
A bolt member (6) is inserted from below into a hole (10) penetrating the body frame (1), and a shaft rod (12) of the bolt member (6) protruding above the body frame (1). A cylindrical member (5) that can be compressed and expanded while attaching a washer (8), and a nut member (7) is screwed onto the cylindrical member (5),
The cylindrical member (5) is inserted into the lower end opening (13) of the pipe-like pedestal (3), and the cylindrical member (5) is compressed in the vertical direction by the bolt member (6) and the nut member (7). And is configured to hold the main body frame (1) on the pipe-like pedestal (3) by expanding in the radial direction and press-contacting with the inner peripheral surface (3a) of the pipe-like pedestal (3) ,
A notch (4) is formed in the peripheral edge (13a) of the lower end opening (13) of the pipe-like pedestal (3), and an upright protruding piece (9) projecting upward from the main body frame (1). In the state where the cylindrical member (5) of the main body frame (1) is inserted and held in the lower end opening (13) of the pipe-like pedestal (3). A wheel mounting structure characterized in that (9) is engaged with the notch (4) to prevent relative rotation of the main body frame (1) and the pipe-like pedestal (3). body.

上記ワッシャ（８）に、上記起立片（９）に係止するための凹溝部（１８）が形成されている請求項１記載の車輪取付構造体。 The wheel mounting structure according to claim 1 , wherein the washer (8) is formed with a concave groove (18) for engaging with the upright piece (9) .

上記パイプ状脚柱（３）は、上記下端開口部（１３）の上記周端縁（１３ａ）が上記本体フレーム（１）に当接している請求項１又は２記載の車輪取付構造体。 The wheel mounting structure according to claim 1 or 2, wherein the pipe-like pedestal (3) has the peripheral edge (13a) of the lower end opening (13) in contact with the main body frame (1) .