KR20160026646A - roller assembly - Google Patents

Abstract

The present invention relates to a roller assembly for a storage device in which noise can be prevented from being slippery, smooth rolling is possible, and peeling of a portion made of a rubber material can be prevented.
To achieve this object, the present invention provides a method of manufacturing a honeycomb structure including a cylindrical body portion opened to the front and rear sides, a partitioned portion formed so as to block the inner circumferential surface of the body portion and having a through hole formed on the central portion thereof and an expanded end formed to extend outwardly from the outer peripheral surface of the body portion, absence; A contact member made of a rubber material or a silicone material and being injection-molded so as to collectively surround the outer ends of the expanding end and the body end of the rolling member; And a fastening part that is fastened to the accommodating device while the rolling member is rotatably installed. The roller assembly for a storage device is provided.

Description

Roller assembly for a storage device {roller assembly}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a roller assembly applied to a storage device, which prevents tilting due to concentration of loads on a specific part during operation of the storage device, prevents noise and slip phenomenon, The present invention relates to a roller assembly for a storage device according to the present invention, which can prevent peeling of a portion made of a material.

BACKGROUND ART [0002] Generally, a storage unit such as a vegetable box of a refrigerator is provided with a roller assembly for smooth movement of the storage unit. The conventional roller assembly includes a shaft coupled to the refrigerator body, And a roller.

In particular, in recent years, various types of roller assemblies have been provided in which the contact area between the rollers and the shaft can be minimized so that the rolling of the rollers can be more smoothly performed. In this regard, in the registration patent application No. 10-0908659, 20-0452543 and the like.

However, in the above-described conventional roller assembly, the roller is formed of polyoxymethylene (POM) material, so that the roller and the counterpart (for example, a vegetable box or a rack on which a shelf is placed) There is a problem that noise is generated due to contact, and excessive withdrawing of the storage device due to a slipping phenomenon occurs.

Conventionally, there has been an effort to minimize the slip phenomenon by joining a rubber material or an O-ring made of silicone to the outer circumferential surface of the roller. However, The width of the roller is designed to be a width considering the weight of the receiving device. However, when the receiving device is operated, the weight is biased to both sides of the roller, Its application has not been made because of its noise and damage.

Further, as the weight of the accommodating device becomes larger, the above-mentioned O-ring has a problem that the frictional force with the opponent increases, and the O-ring can not be smoothly operated and easily peeled off from the roller.

Of course, the entire roller may be formed of a rubber material or a silicon material. However, since the size of the shaft supporting the roller is relatively smaller than the size of the roller, a load of the storage device is provided to the roller The roller may not be smoothly moved due to the tilting of the roller from the shaft. In addition, since the roller is easily peeled off from the shaft, there is a problem of operational reliability.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a method for preventing noise and slip phenomenon, And a roller assembly for a storage device according to the present invention.

In order to achieve the above object, according to the present invention, there is provided a roller assembly for a storage device, comprising: a cylindrical body which is open to the front and rear; a partition which is formed to block the inner circumferential surface of the body and has a through- A rolling member having unified extension ends formed so as to be integral with each other; A contact member made of a rubber material or a silicone material and being injection-molded so as to collectively surround the outer ends of the expanding end and the body end of the rolling member; And a fastening part which is fastened to the accommodating device while the rolling member is rotatably installed.

In this case, a plurality of communication slits are formed in the extending end of the rolling member so as to pass through in the front-rear direction.

Further, the outer peripheral edge of the expanding end forming the rolling member is rounded.

Further, a receiving groove is formed on the front side and the rear side outer wall surface of the partitioning end forming the rolling member.

Further, the fastening portion may include a holder that forms a portion coupled to the accommodating device, and a shaft that forms a portion coupled to the rolling member, and the holder and the shaft are separately provided and detachably coupled to each other, And the holder and the shaft are formed as a single body.

As described above, the roller assembly of the present invention prevents the stress concentration on a specific portion from being concentrated due to the contact member made of a rubber material forming the entire circumferential surface of the roller assembly, so that the roller assembly is prevented from being tilted toward one side Therefore, it is possible to prevent the generation of the uneven wear, the breakage of the shaft, and the breakage of the holder.

Furthermore, the contact member can minimize the contact noise with the rail during the rolling operation of the roller assembly, and also has an effect that excessive withdrawal of the storage device due to slipping can be prevented.

In addition, the contact member of the roller assembly of the present invention is integrally formed with the rolling member by double injection, and also has the effect of preventing the roller assembly from being peeled off during the rolling operation by the plurality of communication slits formed in the extended end.

Further, in the roller assembly of the present invention, among the respective parts of the rolling member, a receiving groove for minimizing the contact area and temporarily accommodating the lubricant is formed at a portion in contact with the shaft and the holder, and the receiving groove is closed with a Teflon sheet So that the smooth rolling motion can be always performed.

1 is an exploded perspective view illustrating a roller assembly for a storage device according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating a roller assembly for a storage device according to an embodiment of the present invention.
3 is a cross-sectional view illustrating an internal structure of a roller assembly for a storage device according to an embodiment of the present invention
Fig. 4 is an enlarged view of the " A &
5 is an enlarged view of " B "
6 to 12 are cross-sectional views for explaining another embodiment of the roller assembly for a storage device of the present invention

Hereinafter, preferred embodiments of a roller assembly for a storage device of the present invention will be described with reference to FIGS. 1 to 12 attached hereto.

Prior to the description of the embodiment, the directions represented by the respective explanations will be described with reference to the direction shown in the drawing, that is, the left side is the front side and the right side is the rear side.

FIG. 1 is an exploded perspective view illustrating a roller assembly for a storage device according to an embodiment of the present invention. FIG. 2 is an assembled perspective view illustrating a roller assembly for a storage device according to an embodiment of the present invention. Sectional view illustrating an internal structure of a roller assembly for a storage device according to an embodiment of the present invention.

As shown in these drawings, the roller assembly for a storage device according to an embodiment of the present invention includes a rolling member 100, a contact member 200, and a fastening portion. In particular, So that the rolling member 100 is formed by double injection molding. In addition, the rolling member 100 is further provided with a coupling structure for rigid coupling with the contact member 200.

This will be described in more detail below for each configuration.

First, the rolling member 100 forms a basic body of the roller assembly and is rotated.

In the embodiment of the present invention, it is shown that the rolling member 100 is composed of the body 110, the partition 120 and the extension 130 as a unitary body.

Herein, the body 110 has a hollow cylindrical shape opened frontward and rearward, and the weight of the housing unit (not shown) supported by the roller assembly and the weight including the articles stored in the housing unit are taken into consideration (The length in the front-rear direction side) and the thickness (the thickness in the radial direction side).

In addition, the dividing end 120 is rotatably coupled to a holder 300, which will be described later, and is formed so as to intercept the inner circumferential surface on the center side of the body end 110.

At this time, the partitioning stage 120 is formed to have a thickness (length in the front and rear direction side) considering the weight including the weight of the storage device and the articles stored in the storage device, like the body stage 110 described above, A through hole 121 through which a shaft 400 to be described later passes is formed at a central portion of the dividing end 120.

Particularly, in the embodiment of the present invention, it is additionally proposed that the receiving grooves 122 are recessed in the front side outer wall surface and the rear side outer wall surface of the dividing end 120, respectively. That is, the contact area between the partition stage 120 and the shaft and the holder can be minimized through the provision of the receiving groove 122, and a lubricant, such as grease, Thereby minimizing the occurrence of abrasion of the shaft 400 and the holder 300 which are in close contact with the front side outer wall surface and the rear side outer wall surface of the dividing end 120, So that the operation can be smoothly performed. At this time, the receiving groove 122 may be formed as a ring-shaped groove as shown in the embodiment, or may be formed as a groove partially formed on the outer wall surface of the dividing end 120 (not shown).

The extension end 130 is formed to extend outwardly from the center-side outer circumferential surface of the body 110 as a portion for a strong coupling with the contact member 200 to be described later.

The width of the extended end 130 is smaller than the width of the body 110. The width of the extended end 130 may be maximized so that the contact area with the contact member 200 is maximized. So that stable contact with the contact member 200 is possible. Preferably, the width is in a range of 1/2 to 3/2 of the width of the body 110.

Particularly, in the embodiment of the present invention, a plurality of communication slits 131 are formed in the extending end 130 so as to pass through the front and back. That is, by allowing the injection material to exist in the communication slits 131 in the process of double injection of the contact member 200 to be described later on the rolling member 100, the weight of the storage device during the rolling operation of the rolling member 100 The contact member 200 can be prevented from being peeled off while keeping the state in which the contact member 200 is always correctly coupled from the rolling member 100 irrespective of tilting of the rolling member 100 or the like.

In addition, it is preferable that the outer peripheral edge of the extension end 130 constituting the rolling member 100 be rounded. In other words, it is possible to prevent the tear of the contact member 200 due to the corner, and the load provided from the contact member 200 is concentrated toward the center of the extended end 130, So that it can be evenly dispersed over all of the stage (110) and the stage (120).

Meanwhile, the rolling member 100 according to the embodiment of the present invention described above is formed of polyoxymethylene (POM) to provide sufficient strength for supporting the receiving device.

Next, the contact member 200 is a portion forming the outer surface of the roller assembly and a portion substantially contacting the rail (not shown) on which the storage device is mounted.

Such a contact member 200 is formed in a ring shape to surround the outer ends of the extended end 130 and the body end 110 of the rolling member 100 and is particularly formed by double injection molding.

That is, the contact member 200 is injection-molded again on the outer surface of the rolling member 100, which is prepared by injection molding, so that a part of the contact member 200 is formed on the extension end 130 of the rolling member 100 So that the contact member 200 can be prevented from being peeled off from the rolling member 100 through the communication slit 131.

At this time, the contact member 200 is formed of a rubber material or a silicone material made of a thermoplastic elastomer (TPE), thereby preventing slippage of the roller assembly during rolling motion along the rail, Thereby preventing the generation of noise due to the contact of the contact portion.

Particularly, since the width of the contact member 200 is equal to the width of the body 110 of the rolling member 100, the roller assembly can be prevented from being tilted to one side Thus, the occurrence of the irregular wear can be prevented, and the roller assembly can be prevented from being damaged.

Next, the fastening portion is a portion where the fastening member is fastened to the accommodating device and the rolling member 100 is rotatably installed.

Such a fastening portion may be variously configured according to the coupling structure with the rolling member 100, the coupling structure with the accommodation device (not shown), noise, etc. In the embodiment of the present invention, As shown in the drawing, the fastening portion includes a holder 300 and a shaft 400 as an example.

Here, the holder 300 is a portion to be fastened to the accommodating device, and includes a fastening end 310 and a fastening coupling end 320.

The close end 310 is in contact with the outer surface of the rear end of the dividing end 120 forming the rolling member 100 and has a larger diameter than the through hole 121 formed in the dividing end 120 And is formed so as to have a diameter enough to cover the receiving groove 122 formed on the outer surface of the rear side of the dividing end 120. [ At this time, a coupling groove 311 for coupling with the shaft 400 passing through the through hole 121 is formed in a front surface of the close end 310 which is in close contact with the dividing end 120.

In addition, the coupling end 320 protrudes rearward from the rear surface of the close end 310 and is coupled to the receiving device. At this time, the outer circumferential surface of the coupling end 320 is screwed to the receiving device by being formed in a screw structure.

The shaft 400 is a portion where the rolling member 100 is rotatably installed while providing a mounting region of the rolling member 100 together with the holder 300.

The shaft 400 includes a locking end 410 and a press-fitting coupling end 420.

The engaging end 410 is in close contact with a front side outer surface of the dividing end 120 constituting the rolling member 100. The receiving end 410 has a larger diameter than the through hole 121 formed in the dividing end 120, And is formed to have a diameter enough to cover the receiving groove 122 formed on the outer surface on the front side of the dividing end 120. [ At this time, a tool engagement groove 411 is formed on the front surface of the latching end 410 so that coupling between the holder 300 and the partner can be performed through the operation of the shaft 400.

The press-fit coupling end 420 protrudes rearward from the rear surface of the retaining end 410 and penetrates through the through hole 121 of the partitioning end 120 to be inserted into the close end 310 of the holder 300 And is press-fit in the inside. At this time, the shape of the diameter and the outer peripheral surface of the press-fit coupling end 420 is determined so that the press-fit coupling end 420 is press-fitted into the coupling groove 311 formed in the close end 310 of the holder 300. Of course, although not shown, the press-fit coupling end 420 may be formed in various structures such as a serration structure or a screw structure.

In the embodiment of the present invention, a ring-shaped Teflon sheet (not shown) is formed between the contact surface between the rolling member 100 and the holder 300 and the contact surface between the rolling member 100 and the shaft 400, 500) is further provided.

The Teflon sheet 500 prevents the lubricant present in the receiving grooves 122 of the partitioning end 120 of the rolling member 100 from being discharged and prevents the holder 300 And is provided to prevent the occurrence of contact noise due to the contact of the tight end 310 or the locking end 410 of the shaft 400. The ring-shaped sheet is a thin film.

Hereinafter, the manufacturing process of the rolling member 100 and the contact member 200 of the roller assembly according to the embodiment of the present invention will be described in more detail.

First, the rolling member 100 allows the body 110, the dividing end 120, and the expanding end 130 to be integrally formed through a single injection molding.

When the manufacturing of the rolling member 100 is completed, the contact member 200 is integrally formed on the outer surface of the rolling member 100 through a separate injection molding operation.

That is, through the double injection process, the circumferential surface of the body 110 of the rolling member 100 and the outer surface of the extended end 130 are formed so as to completely enclose the contact member 200.

Therefore, when the injection molding of the contact member 200 is completed, the contact member 200 is integrated with the rolling member 100, and in particular, The contact member 200 is prevented from being peeled off the rolling member 100 from the rolling member 100 because the communication slit 131 of the extended end 130 of the rolling member 100 is gripped.

Next, when the manufacture of the rolling member 100 in which the contact member 200 is integrated is completed through the above process, the holder 300 and the shaft 400 are assembled to the rolling member 100.

The assembling operation is performed by inserting the press fitting end 420 of the shaft 400 into the through hole 121 formed in the dividing end 120 of the rolling member 100 and fixing the fitting end 310 of the holder 300 To the engaging groove 311 formed in the engaging recess 311. [

The distance between the engaging end 410 of the shaft 400 and the partitioning end 120 of the rolling member 100 and between the partitioning end 120 of the rolling member 100 and the close end 310 of the holder 300, And a grease is applied between the respective Teflon sheets 500 and the contact surfaces between the respective Teflon sheets 500 and 120. [

Accordingly, the manufacture of the roller assembly is completed through the above-described process, and the completed roller assembly is assembled by coupling the coupling end 320 of the holder 300 to the receiving device.

As a result, as described above, the roller assembly of the present invention provided in the accommodating device as described above prevents the stress concentration to a specific portion as the contact member 200 made of rubber forms the entire circumferential surface of the roller assembly, It is possible to prevent the tilting to one side during operation and to prevent the occurrence of the uneven wear, the breakage of the shaft 400 and the breakage of the holder 300.

Further, the contact member 200 can minimize the contact noise with the rail during the rolling operation of the roller assembly, and prevent excessive withdrawal of the storage device due to slipping.

In addition, since the contact member 200 constituting the roller assembly of the present invention is integrally formed with the rolling member 100 by double injection, peeling of the roller assembly during rolling operation can be prevented.

The roller assembly of the present invention has a receiving groove 122 for minimizing the contact area and temporarily accommodating the lubricant at a portion of the rolling member 100 where the shaft 400 and the holder 300 contact each other, In addition, since the receiving groove 122 is closed by being covered with the Teflon sheet 500, smooth rolling operation can be always performed.

Meanwhile, the fastening portion of the roller assembly for a storage device of the present invention may be formed in a variety of structures unlike the structure of the above-described embodiment.

That is, the fastening part includes a holder 300 forming a part to be coupled to the storage device, and a shaft 400 constituting a part coupled to the rolling member 100. However, as in the above- 300 and the shaft 400 may be separately provided and detachably coupled with each other, and the holder 300 and the shaft 400 may be formed as a unitary body. In this case, And is rotatably installed on the rolling member 100 with various joining structures considering the shape of the rolling member.

For example, as shown in FIGS. 6 and 7, the holder 300 and the shaft 400 are integrally formed, and the shaft 400 penetrates the through hole 121 of the rolling member 100 And the catch member 140 may be provided on the rolling member 100 to prevent the shaft 400 from being separated.

8, the fastening portion includes a holder 300 and a shaft 400 separated from each other, and a through hole 121 of the rolling member 100 is passed through the tip of the holder 300. As shown in FIG. And the press-fitting end 420 of the shaft 400 may be press-fitted and fixed to the penetrating end 330. In this case,

9, the fastening portion includes a holder 300 and a shaft 400, which are separated from each other. The fastening portion includes a through hole (not shown) of the rolling member 100 between the holder 300 and the shaft 400, The press fitting portion 420 of the shaft 400 is inserted into the fitting groove 311 of the holder 300 through the press fitting portion 600 and the press fitting portion 600 It may be configured to be fixed.

10, the fastening part includes a holder 300 and a shaft 400 separated from each other, and the central part of the dividing end 120 of the rolling member 100 protrudes, Or may be formed to support the close end 310.

11, the fastening part is configured such that the holder 300 and the shaft 400 are formed as a unitary body, and the shaft 400 is formed in a manner that the through hole 121 of the rolling member 100 is positioned rearward (Left side in the drawing), and then the washer 340 is coupled to the rolling member 100 by riveting the tip end portion thereof.

12, the fastening part is configured such that the holder 300 and the shaft 400 are formed as a single body, and the shaft 400 is formed in a manner that the through hole 121 of the rolling member 100 is moved forward (For example, a combination of a serration structure) by engaging the engaging ring 350 with the rolling member 100 after the engaging ring 350 is pierced from the rear side (left side in the drawing) to the rear side

As described above, the contact member 200 of the roller assembly for a storage device of the present invention can be variously applied regardless of the shape of the fastening portion.

100. Roller member 110. Body member
120. Section 121. Through hole
122. Receiving groove 130. Expansion stage
131. Communicating slit 140. Engaging chin
200. Contact member 300. Holder
310. Adhesive end 311. Coupling groove
320. Fastening coupling end 330. Fastening end
340. Washer 350. Coupling ring
400. Shaft 410. Hanging end
411. Tool coupling groove 420. Press fitting coupling end
500. Teflon sheet

Claims (6)

A rolling member having a cylindrical body part opened to the front and rear, a partitioning part formed so as to block the inner circumferential surface of the body part and having a through hole formed on the central part thereof, and an extended end formed to extend outwardly from the outer circumferential surface of the body part;
A contact member made of a rubber material or a silicone material and being injection-molded so as to collectively surround the outer ends of the expanding end and the body end of the rolling member;
And a fastening portion that is fastened to the accommodating device while the rolling member is rotatably installed. The method according to claim 1,
Wherein a plurality of communication slits are formed in the extending end of the rolling member so as to pass through in the front-rear direction. The method according to claim 1,
Wherein an outer circumferential edge of the extended end of the rolling member is rounded. The method according to claim 1,
Wherein a receiving groove is formed on the front side and the rear side outer wall surface of the partitioning end forming the rolling member. 5. The method according to any one of claims 1 to 4,
The fastening portion
And a shaft constituting a portion to be coupled to the rolling member,
Wherein the holder and the shaft are separately provided and detachably coupled to each other. 5. The method according to any one of claims 1 to 4,
The fastening portion
And a shaft constituting a portion to be coupled to the rolling member,
Wherein the holder and the shaft are formed as a unitary body.

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