KR100984009B1

KR100984009B1 - Caster for cart

Info

Publication number: KR100984009B1
Application number: KR1020100019242A
Authority: KR
Inventors: 김영교
Original assignee: 김영교
Priority date: 2010-03-04
Filing date: 2010-03-04
Publication date: 2010-09-28

Abstract

PURPOSE: A caster for a cart is provided to ensure the stable linearity since a position determining unit is elastically inserted into a position determining groove and maintains the position. CONSTITUTION: A caster for a cart comprises an aligning unit. The aligning unit comprises a holder and a fixing unit. The holder is detachably connected to the leg of the cart. The fixing unit comprises a guide unit. The guide unit is affected by the elastic support force in a vertical direction and thus elastically lifts. The guide unit of the fixing unit makes contact with the outside of the upper part of each support(5a) and guides the linearity of a wheel bracket(5). The fixing unit comprises a installation groove, a spring and a position guiding unit. While an inner space of the installation groove is formed on the location corresponding to the upper part of the outside of the support and its bottom is opened. The spring is installed in the installation groove. The position guiding unit is affected by the elastic supporting force of the spring and a part of the position guiding unit is exposed to the outside of the installation groove.

Description

Caster for carriages {Caster for cart}

The present invention relates to a caster mounted on a transport port such as a mobile cart of an industrial site or a shopping cart of a shopping mall, and more particularly, for a transport device used in a front wheel to ensure good steering and straightness to improve direction change and driving safety. It is about casters.

In general, a caster for improving mobility through cloud movement is installed at a lower portion of a shopping cart, a freight transport cart, or a heavy transport for transporting heavy goods used in a large shopping mall.

Such casters are roughly classified into rotatable casters that can be rotated 360 degrees according to the type of cart and the order of the order, and fixed casters for driving straight.

For example, in the case of a baby carriage, the front wheel is provided with a rotary caster, the rear wheel is installed with a fixed caster, and in the case of a cart or a port used in a large shopping mall or a place where rapid turnover is required, the front and rear wheels All of them are equipped with a rotary caster.

In addition, in the case of an industrial cart or a carriage used in a place where stable straightness is required in a relatively large area, the front wheel is a fixed caster and the rear wheel is a rotary caster.

In other words, the fixed type and the straight type are selected and mounted in consideration of steering and straightness according to the location and environment used. When the straightness is required greatly, the fixed caster is used for both the front wheel or the front and rear wheels. When switching is required, both front and rear wheels are used with castors.

However, the caster installed in the cart or the carriage according to the prior art is selected by mounting the fixed type and the rotation type in consideration of steering and straightness, but in the case of a good steering ability by installing the rotary type on all four wheels as in the case of a shopping mall There is a disadvantage in that straightness is very poor, and as a result, it is difficult to satisfy both steering and straightness.

For example, in the case of a cart used in a large mart or a shopping mall, four legs are extended to the bottom of a cart main body for storing goods, and a rotary caster capable of rotating 360 degrees is provided at the end of each leg.

In the case of such a shopping cart, when the cart is driven in a desired left or right direction to change directions while driving, all the casters are rotated so that the direction can be easily changed by rotating freely. In this case, since both front and rear wheels are difficult to maintain the same alignment state, there is a disadvantage that the straightness is very poor as a result. In other words, in the case of a carriage that needs to be moved in a relatively narrow place, four rotary carriers are mounted on both the front and rear wheels, and each of these carriers has contact force with the ground depending on the condition of the road surface, the weight distribution of the heavy materials, and the degree of rotation of each caster. This difference makes it difficult for both front and rear casters to maintain alignment.

For example, a cart mainly used in a shopping mall is equipped with four rotary carriers, and the load acting on the left and right casters when the load is eccentrically loaded on either the left or right side of the cart based on the straight driving direction. Not only are the loads different from each other, but also the contact force of these casters in contact with the ground is different, resulting in difficulty in maintaining the alignment of the left and right casters.

Therefore, as the alignment of the wheels decreases, not only the straight running becomes poor, but also the shaking occurs due to the wheels of each caster moving left and right. Since it has to exert strength, there is a problem that not only greatly reduces the transport workability but also aggravates consumer complaints about the product.

The present invention was created in order to solve the problems of the prior art as described above, an object of the present invention is a carriage that can maintain a stable straightness when running straight without sacrificing the reversibility of the rotary caster installed in the carriage To provide a caster.

In order to achieve the above object, a caster for a carriage according to a preferred embodiment of the present invention includes a wheel bracket having a pair of support pieces coupled to both sides of the wheel and rotatably supported, and a horizontal plate portion connecting the support pieces. And a rotatable member rotatably coupled to an upper portion of the horizontal plate portion, the upper portion of the horizontal plate portion being coupled to a bottom surface of the conveyance port for carrying the article, wherein the horizontal plate portion has a positioning groove formed on one side thereof. , The rotating member is characterized in that it comprises a straight running guide means having a positioning tool that is elastically inserted into the positioning groove receives the elastic support in the vertical direction.

As a preferred feature of the invention, the housing is provided with a space formed inside the vertically provided on one side of the rotating member and the lower surface; A spring provided inside the housing; It is configured to include a positioning tool that is exposed to the lower part of the housing under the elastic support of the spring.

As another preferable feature of the present invention, the rotating member and the case is provided with a straight running guide means on one side to form an outer body; A coupling part integrally provided at an upper portion of the case and coupled to a transport port; It is provided in the case is configured to include a bearing ball to make a rolling contact with the horizontal plate portion.

According to another preferred embodiment of the present invention, a caster for transporting apparatus includes a wheel bracket having a pair of support pieces coupled to both sides of the wheel and rotatably supported, and a horizontal plate portion connecting the support pieces, and the horizontal plate portion. A carrier caster comprising a rotatable member rotatably coupled to an upper portion and a top of which is coupled to a leg of a carriage for carrying an article, wherein the caster is detachably coupled to the holder of the carriage through a binding element and to the holder. One end is connected and the other end is provided on the upper side of the horizontal plate portion is provided with a position guide for elastic lifting by receiving the elastic support force in the vertical direction to induce the straightness of the wheel bracket by contacting the upper outer side of each support piece It characterized in that it comprises an alignment means made of a fixed body.

As a preferable feature of the present invention, the fixing body and the installation groove is the lower surface is opened while the space is formed in a position corresponding to the outer upper portion of the support piece; A spring provided inside the installation groove; It is configured to include a position guide that is exposed to the lower portion of the installation groove under the elastic support of the spring.

In another preferred aspect of the present invention, the binding element is any one of a screw member and a band for fastening the holder and the leg.

The caster for carriage according to the present invention has a straight driving guide means having a positioning groove and a positioning tool to be resiliently inserted into the positioning groove in the rotary caster rotatably installed 360 degrees on the bottom of the carriage. Through this, it is possible to stably guarantee the straightness, thereby enabling the smooth movement of the transportation equipment such as a shopping cart or an industrial cart, and thus, a useful effect is expected to increase the ease of use and satisfaction with the product.

In particular, the caster of the present invention has an advantage of enabling a quiet straight running since the positioning tool is resiliently inserted into the positioning groove during straight running to prevent the wheels from being shaken finely by moving left and right. .

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in this specification and claims are not to be interpreted in a conventional and dictionary sense, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

1 is a perspective view showing a cart to which a caster for carrying equipment according to the present invention is applied;
2 is a perspective view showing a caster for a carriage according to the present invention;
3 is an exploded perspective view for explaining the main configuration of the caster for transporting apparatus according to the present invention;
4 and 5 are cross-sectional views for explaining the operation of the caster for the carriage according to the invention,
Figure 6 is a plan view for explaining the operation of the caster for the carriage according to the invention,
7 is a perspective view showing a caster for a carriage according to another embodiment of the present invention;
FIG. 8 is a cross-sectional view illustrating a main part configuration of the caster for transporting port of FIG. 7. FIG.
9 is a perspective view showing a caster for a carriage according to another embodiment of the present invention,
FIG. 10 is a perspective view illustrating a main part of FIG. 9; FIG.
FIG. 11 is a cross-sectional view for explaining a configuration of the caster for carrying tool according to FIG. 9. FIG.

Hereinafter, referring to the accompanying drawings, a caster for a carriage according to the present invention will be described.

First, it should be noted that like elements or parts in the drawings are denoted by the same reference numerals as much as possible. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted in order not to obscure the subject matter of the present invention.

1 is a perspective view showing a cart to which a caster for transporting apparatuses according to the present invention is applied, and four casters 1 are mounted on the leg cl of a transporting tool c such as a shopping cart which is used in a large shopping mall. It was shown to be installed in pairs.

Figure 2 is a perspective view showing the caster caster according to the present invention, Figure 3 is an exploded perspective view for explaining the main configuration of the caster caster according to the invention, the caster 1 of the present invention is largely the wheel (3) and , A wheel bracket 5 rotatably supporting the wheel 3, and a rotation member 7 rotatably coupling the wheel bracket 5 to the carrying port c.

4 and 5 are cross-sectional views for explaining the operation of the caster caster according to the present invention, Figure 6 is a plan view, Figure 4 is a positioning groove at each relative position of the wheel bracket 5 and the rotating member (7). (10) and the positioner 23 which is elastically seated in the positioning groove 10 is inserted to maintain the straightness, Figure 5 shows the positioning groove 10 by the change of direction Is a view showing a state in which the positioning tool 23 is separated.

The caster for transporting apparatus 1 according to the present embodiment includes a wheel bracket 5 rotatably supporting a wheel 3 that makes a rolling motion in contact with the ground, and is rotatably coupled to the wheel bracket 5. One side is provided at a position facing the rotary member 7 and the wheel bracket 5 and the rotary member 7 coupled to the leg (cl) of the transport (c), such as a shopping cart or industrial cart, respectively. The wheel 3 is composed of a positioning groove 10 for applying an elastic restraint force to the wheel bracket 5 and the rotating member 7 and the straight running guide means 20 to have a straightness.

The wheel bracket 5 is a pair of support pieces 5a coupled to both sides of the wheel 3 for rolling motion and rotatably supported, and a horizontal plate portion 5b connecting the support pieces 5a to each other. It is composed.

The wheel bracket 5 may be additionally equipped with a stopper (unsigned) or an additional brake that restricts the rotation of the wheel so that the wheel bracket 5 may not move in a state where it is mounted on a moving walk of a large shopping mall according to the type of the carrying port c. Since such a configuration may be implemented by a well-known technique, detailed description is abbreviate | omitted.

On the other hand, the wheel bracket 5 in the present invention is a positioning groove 10 is formed on the upper side of the horizontal plate portion 5b, this positioning groove 10 is preferably provided in a hemispherical shape By selectively inserting the positioning tool 23 constituting the straight running guide means 20 to be described later serves to maintain the straightness of the wheel (3).

Rotating member 7 is rotatably coupled to the bottom of the transport port (c), such as shopping carts, industrial carts, etc., is provided on the upper side of the case (7a) and the case (7a) to form an outer A bearing ball 7b, which is a rolling element provided inside the coupling part 7c coupled to the bottom of the carrying hole c and the case 7a, and makes rolling contact with the horizontal plate part 5b of the wheel bracket 5. The coupling portion 7c is proposed to be provided in the form of a bolt, but according to the shape or size of the transport port (c), a variety of known methods, that is fixed by welding or screwed structure of various forms Can be combined.

In addition, the rotating member 7 is provided on the bottom surface of the carrying hole (c), and the shape or structure may be changed as long as it has a feature that the rotational movement with the wheel bracket (5) is provided.

On the other hand, the rotary member 7 is provided with a straight traveling guide means 20 on one side, the straight traveling guide means 20 at this time corresponds to the positioning groove 10 of the wheel bracket (5) In place.

The straight running guide means 20 is configured to include a positioning tool 23 is elastically inserted into the positioning groove 10 by the action of the elastic support in the vertical direction.

The straight traveling guide means 20 is provided at one side of the rotary member 7 perpendicular to the housing 21 is formed in a cylindrical shape with a space formed therein and the lower surface, and the housing 21 of It is provided with a spring (25) provided inside to apply an elastic force, and a positioning hole (23) which is provided inside the housing (21) to protrude downward by the elastic force of the spring (25).

Reference numeral 27 denotes a cover that shields the upper surface of the cylindrical housing 21, and reference numeral 29 denotes a mounting bracket for mounting the housing 21.

On the other hand, the straight running guide means 20 is formed in a position that can maintain the state in which the positioning tool 23 is inserted into the positioning groove 10 when the carrier (c) and the wheel is in a straight state. do.

Referring to the operation of the caster for a carriage according to the present invention configured as described above are as follows.

First, the straight running state of the wheel 3, as shown in Figure 4, the positioning tool 23 constituting the straight running guide means 20 is the wheel by the elastic bearing force of the spring 25 It is inserted into the positioning groove 10 formed in the horizontal plate part 5b of the bracket 5.

In this state, since the positioning tool 23 is in surface contact with the positioning groove 10 by the elastic force of the spring 25, frictional force is generated, and the wheel bracket 5 and the rotating member 7 are caused by this frictional force. ) Will remain elastically constrained. That is, in the state as shown in FIG. 4, since the positioning tool 23 is inserted into the positioning groove 10 and is in frictional contact, the external force for overcoming the elastic support force of the spring 25 is provided to the positioning tool 23. The wheel bracket 5 and the rotation member 7 are elastically restrained until they are acted on, so that the straightness of the conveying port c is maintained.

On the other hand, when the user turns the direction of the conveyer (c) to the left or right to change the direction of the conveyer (c), the positioning tool (resiliently inserted into the positioning groove 10 of the wheel bracket 5) 23) is disengaged to allow the change of direction. At this time, the external force acting for the change of direction should be larger than the elastic force of the spring 25 for elastically pressing the positioning tool 23.

7 and 8 are views showing a caster caster according to another embodiment of the present invention, showing that a plurality of positioning grooves 10 and the straight running guide means 20 which are the main features of the present invention are formed. . Since the positioning groove 10 and the straight traveling guide means 20 in the present embodiment are substantially the same as those described above, detailed description thereof will be omitted.

9 is a perspective view showing a caster for a carriage according to another embodiment of the present invention, Figure 10 is a perspective view showing the main configuration of Figure 9, Figure 11 is a cross-sectional view for explaining the configuration of the caster for the carriage according to Figure 9 to be.

As shown therein, the caster 1 for transporting apparatus according to the present embodiment is similar to the configuration described above. However, in the present embodiment, it is additionally mounted on a rotatable caster that can be freely rotated to ensure good straightness, so that the caster used in the existing can be used without replacing the entire caster. Hereinafter, in describing the present embodiment, the same components as those described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

To this end, the present invention provides a wheel bracket 5 having a pair of support pieces 5a coupled to both sides of the wheel 3 and rotatably supported, and a horizontal plate portion 5b connecting the support pieces 5a. And a rotating member 7 rotatably coupled to an upper portion of the horizontal plate portion 5b, the upper portion of which is coupled to a leg cl of a conveying instrument c for carrying an article. Alignment means 30 is further mounted.

Alignment means 30 is largely composed of a holder 31 which is fixedly coupled to the vehicle body or the leg (cl) of the conveying port (c), and a fixed body (35) integrally provided in the holder (31).

The holder 31 is a member detachably coupled to the leg cl of the carrying port c via the binding element 3. Such a holder 31 is preferably provided in a shape that surrounds a part of the leg (cl) is provided by the fitting coupling, it is coupled by the binding element (3) so that a firm coupling state can be maintained.

On the other hand, in the present invention, the binding element (3) has a groove formed on one side of the holder 31 so that the leg (cl) of the carrying port (c), the bolt and nut to selectively block the inlet of the groove Proposed to be used. Such fastening elements 3 may be applied with various known coupling structures as long as the holders are characterized by being firmly coupled to a part of the conveyance. For example, a welding joint for welding the holder and the carrier leg to each other, or a screw fastening to be screwed into a portion of the holder and the leg of the carrier with a screw member, or a band binding for binding the legs of the holder and the carrier with a mutual band may be used. Can be.

One end of the fixed body 35 is connected to the holder 31, and the other end thereof is provided on the upper side of the horizontal plate portion 5b, and is manufactured separately from the holder 31 and assembled to each other or by injection molding. It can be molded integrally.

The fixed body 35 has a space formed therein at a position corresponding to the upper outer side of each support piece 5a, and an installation groove 36 having a lower surface thereof is formed therein, and an elastic support force in the vertical direction is formed inside the groove. Spring 38 is installed to act. In addition, the inside of the installation groove 36 is provided with a position guide port 37 is exposed to the outside of the installation groove 36 by receiving the elastic support of the spring 38.

At this time, the position guide 37 is provided so that the entirety is completely prevented from being separated to the outside of the installation groove 36, for this purpose the inlet diameter of the installation groove 36 of the position guide 37 It is possible by designing small compared with diameter. In addition, the position guide 37 and one end of the spring 38 may be joined to each other by welding, and the other end of the spring 38 may be fixed to one inner side of the installation groove 36.

The alignment means 30 configured as described above protrudes the position guides 37 on the upper outer side of the pair of support pieces 5a, which are the support members disposed on both sides of the wheel 3, so that the left and right flows are elastic. As a result, the wheel bracket 5 supporting the wheel 3 can be restrained from easily flowing left and right.

That is, since the wheel bracket 5 is prevented from flowing left and right in a state where the position guide 37 is in contact with the upper outer side of the pair of support pieces 5a, the position guide 37 Since the wheel bracket 5 is fixed to the leg cl of the transporting tool c until an external force that overcomes the elastic support force of the spring 38 is applied, the straightness of the transporting tool c is consequently maintained. maintain.

On the other hand, when the user twists the direction of the conveyance (c) to the left or right to change the direction of the conveyance (c), it is to press the position guide located on the side of the direction in which the support piece (5a) is switched, Since the external force acting on the position guide is greater than the elastic support force of the spring, as a result, the position guide can be changed in the direction of the wheel bracket 5 supporting the wheel 3 as the position guide is pressed and moved into the installation groove. .

On the other hand, the present invention is not limited to the described embodiments, it is possible to use and change the application site, it is common in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have knowledge. Therefore, such modifications or variations will have to belong to the claims of the present invention.

1: caster 3: wheel
5: wheel bracket 5a: support piece
5b: horizontal plate portion 7: rotating member
10: positioning home 20: straight driving guide means
21 housing 23 positioning sphere

Claims

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A wheel bracket 5 having a pair of support pieces 5a coupled to both sides of the wheel 3 and rotatably supported, and a horizontal plate portion 5b connecting the support pieces 5a, and the horizontal plate portion In the caster for carriage 1, which is rotatably coupled to the upper portion of the 5b, the upper portion includes a rotating member (7) coupled to the leg (cl) of the carriage (c) for carrying the article,
One end is connected to the holder 31 and the holder 31 detachably coupled to the leg (cl) of the carrying port (c) through the binding element 33 and the other end is provided on the upper side of the horizontal plate portion (5b) Fixing body is provided with a position guide (37) for elastic lifting by receiving an elastic support force in the vertical direction to induce the straightness of the wheel bracket (5) by being in contact with the upper outer side of the respective support pieces (5a) An alignment means (30) consisting of (35),
The fixing body 35 includes an installation groove 36 in which a lower surface is opened while a space is formed therein at a position corresponding to an outer upper portion of the support piece 5a; A spring 38 provided in the installation groove 36; Caster for carriage characterized in that it comprises a position guide (37) which is exposed to the outside of the installation groove 36 by receiving the elastic support of the spring (38). Caster for carriage characterized in that comprises a.

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5. The caster of claim 4, wherein the binding element (33) is any one of a screw member and a band for fastening the holder (31) and the leg (cl).