KR101814179B1

KR101814179B1 - Wheel for Caster

Info

Publication number: KR101814179B1
Application number: KR1020160017421A
Authority: KR
Inventors: 김영수
Original assignee: 명광산업주식회사
Priority date: 2016-02-15
Filing date: 2016-02-15
Publication date: 2018-01-03
Also published as: KR20170096293A

Abstract

The present invention relates to a wheel for a caster, and more particularly to a wheel for a caster, which prevents outer or inner deformation of the wheel frame due to a vertical load applied to the wheel for a caster through a reinforcement pipe, The present invention relates to a wheel for a caster.
To this end, the present invention is characterized by comprising: an axial cylindrical member serving as a rotation center of a wheel; A bearing coupled to an outer edge of one end of the shaft cylindrical member; A wheel frame in which a pair of wheels are coupled to each other to form a frame of the wheel, and a hollow portion is formed at a center of the wheel frame to insert the shaft cylindrical member; A reinforcing pipe which is received and coupled between the pair of wheel frames when they are opposed to each other; And a cushion member made of a resin material coupled to the upper and the lower peripheries of the wheel frame. The center of the pair of wheel frames has a hollow portion formed in a circular shape. At an end portion of the wheel frame forming the hollow portion, And a second extending portion extending from the first extending portion toward the center of the hollow portion, the shaft cylindrical member to which the bearing is coupled is inserted through the hollow portion of each wheel frame with a pair of the first extending portion and the second extending portion, do.

Description

Wheel for Caster {Wheel for Caster}

The present invention relates to a wheel for a caster, and more particularly to a wheel for a caster, which prevents outer or inner deformation of the wheel frame due to a vertical load applied to the wheel for a caster through a reinforcement pipe, The present invention relates to a wheel for a caster.

In general, a caster to be mounted on a pallet or the like for carrying articles to be carried is divided into a fixed type and a rotary type, and includes a flange for mounting the caster on a pallet or the like, a fork type bracket fixed to the flange, Consists of.

1 is a sectional view showing a wheel for a conventional caster.

1 (a), a conventional caster has an axial cylindrical member 20 serving as a rotation center of a wheel 10, a bearing 30 provided around the axial cylindrical member 20, A cylindrical bushing 40 rotatable independently from the cylindrical member 20 and a wheel frame 50 having a hole at the center and provided with one end 52 which forms a frame of the wheel 10 and which contacts the bush 40 ).

A rubber ring member 60, which serves to smoothly rotate the wheel 10 by absorbing the impact, is coupled to the wheel frame 50.

The side surface of the bent portion 55 where the one end 52 of the wheel frame 50 is provided and the side surface of the bearing 30 are located on the same vertical plane, Shaped cover 70 are brought into close contact with each other.

Around the center hole of the cover (70), the end of the shaft cylindrical member (20) is tightly coupled.

The conventional caster 10 having the above configuration is used as a wheel of a piano or a chair.

When the conventional caster 10 is subjected to a large load, deformation occurs in the wheel frame 50, which is mainly generated in the bent portion 55 of the wheel frame 50.

When a large load is applied to the wheel and deformation occurs in the bent portion 55 of the wheel frame 50, the bent portion 55 overcomes the supporting force of the cover 70, Or the force to deform the bent portion 55 outwardly is blocked by the cover 70 as shown in FIG. 1 (c), and a problem that the force is deformed inward as indicated by an arrow by the reaction force occurs.

Korean Registered Utility Model No. 20-0384482

The present invention has been devised to solve the above-mentioned problems, and it is an object of the present invention to prevent the outer or inner deformation of a wheel frame due to a vertical load applied to a wheel for a caster through a reinforcement pipe, The present invention provides a wheel for a caster.

The present invention has the following features in order to achieve the above object.

The present invention relates to an axial cylindrical member which serves as a rotation center of a wheel; A bearing coupled to an outer edge of one end of the shaft cylindrical member; A wheel frame in which a pair of wheels are coupled to each other to form a frame of the wheel, and a hollow portion is formed at a center of the wheel frame to insert the shaft cylindrical member; A reinforcing pipe which is received and coupled between the pair of wheel frames when they are opposed to each other; And a cushion member made of a resin material coupled to the upper and the lower peripheries of the wheel frame. The center of the pair of wheel frames has a hollow portion formed in a circular shape. At an end portion of the wheel frame forming the hollow portion, And a second extending portion extending from the first extending portion toward the center of the hollow portion, the shaft cylindrical member to which the bearing is coupled is inserted through the hollow portion of each wheel frame with a pair of the first extending portion and the second extending portion, do.

Wherein the reinforcing pipe is disposed on the outer periphery of the first extending portion so as to prevent the first extending portion from being deformed outwardly by the external pressure, and the shaft cylindrical member to which the bearing is coupled is formed of the inner extension of the first extension portion and the inner extension of the second extension portion And the bearing is seated on an inner surface of an 'a' shape formed by an outer surface.

In addition, the shaft cylindrical member is formed with a receiving groove such that the end of the second extending portion of the wheel frame is inserted along the outer boundary of the inner boundary to which the bearing is coupled. The receiving groove is formed in a triangular shape, The outer wall is formed to be inclined and the end of the second extending portion inserted into the receiving groove is formed to correspond to the shape of the receiving groove.

A second receiving groove is formed along a circumference of the inner wall at a predetermined position of the inner wall of the receiving groove, and an end portion of the second extending portion, which is inserted into the receiving groove, A projecting path is formed on the surface.

The reinforcing pipe 140 may further include a third extending portion 134 extending in a direction opposite to the second extending portion 132. The reinforcing pipe 140 may be formed on the inner surface of the facing second extending portion 132 So that the outer edge of the third extending portion 134 and the inner edge of the reinforcing pipe 140 are in contact with each other.

According to another aspect of the present invention, there is provided a wheel for a caster comprising: a shaft cylindrical member serving as a rotation center of a wheel; A bearing coupled to an outer edge of one end of the shaft cylindrical member; A wheel frame in which a pair of wheels are coupled to each other to form a frame of the wheel, and a hollow portion is formed at a center of the wheel frame to insert the shaft cylindrical member; And a cushion member made of a resin material coupled to the upper and the lower peripheries of the wheel frame. The center of the pair of wheel frames has a hollow portion formed in a circular shape. At an end portion of the wheel frame forming the hollow portion, A cylindrical extension portion having a cylindrical shape extending in a direction in which the protruding portion extends, and the facing cylindrical extension portion is formed to have the same length.

According to the present invention, durability is increased by preventing outer or inner deformation of the wheel frame due to the vertical load applied to the wheel for the casters and preventing deviation from the bearing.

In addition, the deformation of the second extended portion due to the external pressure is completely eliminated by the shape of the second extended portion and the receiving groove, thereby preventing deformation of the wheel frame.

1 is a view showing a wheel for a conventional castor.
2 is a perspective view of a wheel for a caster according to an embodiment of the present invention.
FIG. 3 is an exploded perspective view of FIG. 2. FIG.
4 is a sectional view taken along the line AA 'of FIG.
5 is a cross-sectional view illustrating a variant embodiment of the present invention.
6 is a cross-sectional view showing another variant embodiment of the present invention.
7 is a view showing a state in which a wheel frame is deformed by an external pressure.
8 is a cross-sectional view showing another variant embodiment of the present invention.
9 is a sectional view of a wheel for a caster according to another embodiment of the present invention.
10 is an exploded perspective view of a wheel for a caster according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For the sake of convenience, the size, line thickness, and the like of the components shown in the drawings referenced in the description of the present invention may be exaggerated somewhat. The terms used in the description of the present invention are defined in consideration of the functions of the present invention, and thus may be changed depending on the user, the intention of the operator, customs, and the like. Therefore, the definition of this term should be based on the contents of this specification as a whole.

FIG. 2 is a perspective view of a wheel for a caster according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of FIG. 2, and FIG. 4 is a sectional view taken along the line A-A 'of FIG.

Referring to the drawings, a wheel for a caster according to an embodiment of the present invention includes an axial cylindrical member 110 serving as a rotation center of a wheel 100, a bearing (not shown) coupled to an outer edge of one end of the axial cylindrical member 110, A wheel frame 130 which forms a frame of the wheel 100 according to coupling of the pair of the wheels 100 and has a hollow portion formed at the center thereof and into which the shaft member 110 is inserted, A reinforcement pipe 140 which is received and coupled between the wheel frames 130 when the wheels are opposed to each other and a cushioning member 150 made of resin and coupled along upper and lower peripheries of the wheel frame 130.

The shaft cylindrical member 110 is provided so as to be the center of rotation of the wheel. The shaft cylindrical member 110 is fitted to the pair of wheel frames 130 to be described later.

The outer circumference of the outer end of the axial cylindrical member 110 is engaged with the hollow portion of the wheel frame 130 in which the bearing 120 is inserted and the bearing 120 is inserted. So as not to be transmitted to the member 110.

Meanwhile, the wheel frame 130 is divided into a left frame portion and a right frame portion, and the pair of wheels are opposed to each other. The wheel frame 130 forms a frame of the wheel 100.

In addition, a center portion of the pair of wheel frames 130 has a hollow portion formed in a circular shape, and has a first extension portion 131 extending in a direction opposite to each other at the end of the wheel frame 130 forming a hollow portion, A second extending portion 132 extending from the extending portion 131 toward the center of the hollow portion is formed.

The first extending portion 131 and the second extending portion 132 are configured so that the shaft cylindrical member 110 to which the bearing 120 is coupled can be fitted into the wheel frame 130.

That is, when the shaft cylindrical member 110 to which the bearing 120 is coupled is inserted into the hollow portion of the wheel frame 130, the inner shaft of the first extending portion 131 and the outer surface of the second extending portion 132 And the bearing 120 is seated on the inner surface 133 of the 'a' shape.

In addition, since the reinforcement pipe 140, which will be described later, is disposed on the outer edge of the first extension portion 131, the first extension portion 131 can be prevented from being deformed.

Since the deformation of the first extension part 131 causes deformation of the wheel frame 130, the first extension part 131 is formed so that the reinforcement pipe 140 pushes the first extension part 131 from the outside The entire deformation of the wheel frame 130 can be prevented.

The reinforcement pipe 140 reinforces the reinforcement pipe 140 to prevent deformation due to external pressure of the wheel frame 130. The reinforcement pipe 140 is disposed outwardly of the first extension part 131, Thereby preventing the extension portion 131 from being deformed outward by the external pressure.

The inner or outer deformation of the wheel frame 130 is prevented through the wheel frame 130 and the reinforcement pipe 140 in which the first extension part 131 and the second extension part 132 are formed and the bearing 120 Can be coupled to the shaft cylindrical member 110 to which it is coupled.

FIG. 5 is a cross-sectional view showing a deformable embodiment of the present invention, FIG. 6 is a cross-sectional view showing another deformable embodiment of the present invention, and FIG. 7 is a view showing a deformed wheel frame by external pressure.

Referring to the drawings, the castor wheel according to the present embodiment is intended to more reliably prevent the casting wheel of the above-described embodiment from being deformed when a very large external pressure is applied, as shown in Fig. 7 .

That is, the shaft cylindrical member 110 according to this embodiment has the receiving groove 111 (see FIG. 1) such that the end of the second extending portion 132 of the wheel frame 130 is inserted along the outer boundary of the inner boundary, Is formed.

The receiving groove 111 is formed in a triangular shape and the inner wall 111a of the receiving groove 111 is formed perpendicular to the shaft cylindrical member 110 and the outer wall 111b is formed obliquely, The end portion 132a of the second extending portion 132 inserted into the passage 111 is formed to correspond to the shape of the receiving groove 111.

By forming the end portion 132a of the triangular-shaped receiving groove 111 and the second extended portion 132 in a shape and shape corresponding thereto, the end portion 132a is positioned in the receiving groove 111, It is possible to prevent the second extension portion 132 from rotating on the basis of the point of connection with the first extension portion 131. [

7, the end portion 132a of the second extension portion 132 can not be deformed even when the external force is applied to the inner side wall 111a and the inner side wall 111b of the second extension portion 132, It is not possible to rotate due to the interference of the first and second elastic members 31 and 32, thereby preventing deformation.

6, a second receiving groove 111c is formed along a circumference of the inner wall 111a at a predetermined position of the inner wall 111a of the receiving groove 111, Since the protrusion 132b is formed on the end portion 132a opposite to the second receiving groove 111c at the end portion 132a of the second extending portion 132 inserted into the receiving groove 111 So that the second extension portion 132 can not be rotated originally by giving the interference point to the second order.

The insertion of the axial cylindrical member 110 in an oblique contact with the end portion 132a of the second extending portion 132 upon insertion of the shaft cylindrical member 110 along the triangular shape of the receiving groove 111 and the end portion 132a The separation in the opposite direction is facilitated by the vertical formation of the inner wall 111a, and the deviation of the shaft cylindrical member 110 can also be prevented.

8 is a cross-sectional view showing another variant embodiment of the present invention.

Referring to the drawings, a third extension 134 extending in a direction opposite to the second extension 132 is formed unlike the previous embodiment, and the reinforcing pipe 140 are positioned such that both end portions thereof are in contact with the inner surface of the facing second extension portion 132, and the outer edge of the facing third extension portion 134 and the inner edge of the reinforcing pipe 140 are in contact with each other.

Accordingly, the reinforcing pipe 140 is fitted and fitted at both ends of the reinforcing pipe 140 to the horizontal step formed between the second extending portion 132 and the third extending portion 134.

As the reinforcing pipe 140 is coupled between the second extending portion 132 and the third extending portion 134, the third extending portion 134 is separated or deformed outward by the reinforcing pipe 140 when the external pressure is applied It is possible to prevent the entire wheel frame 130 from being deformed in its entirety.

FIG. 9 is a cross-sectional view of a wheel for a castor according to another embodiment of the present invention, and FIG. 10 is an exploded perspective view of a wheel for a castor according to another embodiment of the present invention.

Referring to the drawings, a wheel for a caster according to the present embodiment includes an axial cylindrical member 110 serving as a rotation center of a wheel 100, a bearing 120 coupled to an outer edge of one end of the axial cylindrical member 110, A wheel frame 130 which forms a frame of the wheel 100 according to the coupling of the pair of wheels and which has a hollow portion formed at the center thereof and into which the shaft member 110 is inserted, And a cushioning member 150 made of a resin and coupled along the upper and lower peripheries of the frame.

The castor wheel according to this embodiment is different from the previous embodiment in that a separate reinforcing pipe 140 is removed, and a cylindrical extension portion 133 extending from the hollow portion of the wheel frame 130, Since the reinforcing pipe 140 is replaced with the reinforcing pipe 140, cost reduction and air flow reduction are achieved.

It is needless to say that the cylindrical extension portion 133 extends in the same length in the direction facing the center hollow portion of the pair of wheel frames 130.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

100: Wheel 110: Axial cylindrical member
120: Bearing 130: Wheel frame
140: reinforcing pipe 150: buffer member

Claims

An axial cylindrical member 110 serving as a rotation center of the wheel 100;
A bearing 120 coupled to an outer edge of one end of the shaft cylindrical member 110;
A wheel frame 130 which forms a frame of the wheel 100 when the pair of wheels are opposed to each other and a hollow portion is formed at the center of the wheel 100 so that the shaft member 110 is inserted;
A reinforcing pipe (140) which is received and coupled between the pair of wheel frames (130) when they are opposed to each other;
And a cushioning member 150 made of resin and coupled along the upper and lower circumferences of the wheel frame 130,
The center of the pair of wheel frames 130 has a hollow portion formed in a circular shape. The wheel frame 130, which forms the hollow portion, has a first extending portion 131 extending in a direction opposite to the first extending portion 131, And the second extending portion 132 extending from the first shaft portion 131 to the center of the hollow portion so that the shaft cylindrical member 110 to which the bearing 120 is coupled passes through the hollow portion of each wheel frame 130 Inserted,
The reinforcing pipe (140)
The first extension part (131) is disposed on the outer periphery of the first extension part (131) to prevent the first extension part (131) from being deformed outwardly by external pressure, and the shaft cylindrical member (110) The bearing 120 is seated on the inner surface 133 of the 'a' shape formed by the inner edge of the first extended portion 131 and the outer surface of the second extended portion 132,
The shaft cylindrical member 110
A receiving groove 111 is formed so that the end of the second extending portion 132 of the wheel frame 130 is inserted along the outer boundary of the inner boundary where the bearing 120 is coupled,
The receiving groove 111 is formed in a triangular shape and the inner wall 111a of the receiving groove 111 is formed perpendicular to the shaft cylindrical member 110 and the outer wall 111b is formed obliquely,
And the end portion (132a) of the second extending portion (132) inserted into the receiving groove (111) is formed to correspond to the shape of the receiving groove (111).

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The method according to claim 1,
A second receiving groove 111c is formed along a circumference of the inner wall 111a at a predetermined position of the inner wall 111a of the receiving groove 111 and the second receiving groove 111c is formed along the circumference of the inner wall 111a, Wherein a protruding portion 132b is formed on the end portion 132a of the extending portion 132 on an end portion 132a opposite to the second receiving groove 111c.

The method according to claim 1,
Further comprising a third extension (134) extending in a direction opposite to the second extension (132), respectively,
The reinforcing pipe (140)
Wherein the outer periphery of the third extending portion (134) and the inner periphery of the reinforcing pipe (140) are disposed so as to be in contact with each other so that both ends thereof are in contact with the inner surface of the facing second extending portion (132) Wheel.

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