KR20210014287A - Rail device for dishwasher - Google Patents

Abstract

According to an embodiment of the present invention, a rail device for a dishwasher comprises: a guide body unit; an upper support roller unit which is combined with one side of the guide body unit and is rotated based on a central axis; a lower support roller unit which is combined with one side of the guide body unit, is rotated based on the central axis, and is open to the outside in an axis direction; a guide rail unit which is extended along a sliding direction in a state of allowing one side to be inserted into a space between the upper support roller unit and the lower support roller unit; and a rack roller unit which allows one side to be inserted into the inside of the guide rail unit and allows the other side to be combined with one surface on the inside of a body of the dishwasher or to be combined with a sliding basket. The guide rail unit includes an upper guide unit which is formed in a shape corresponding to a circumference of the upper support roller unit, and a lower guide unit which corresponds to a circumference of the lower support roller unit and is open to the outside. The present invention can ensure structural stability and operational reliability.

Description

Rail device for dishwasher {RAIL DEVICE FOR DISHWASHER}

The present invention relates to a rail device for a dishwasher, and more specifically, an open lower end structure for a smooth drainage function, and a guide rail having a structure capable of absorbing a change in the width direction of the sliding basket It relates to a rail device.

A dishwasher is a kitchen appliance that can automatically wash and dry dishes, cups, and spoons. It operates on the principle of washing dishes with strong water while soaking food with hot steam and detergent. In general, the performance is evaluated according to how tightly the high-pressure water is sprayed to wash the food.

Dishwashers such as the above are home appliances that increase convenience in life and reduce housework hours like conventional air purifiers, dryers, and clothes managers. Recently, sales have increased rapidly in the world including in Korea.

Dishes and cutlery to be washed in the dishwasher can be inserted through a sliding basket that slides inside and outside the dishwasher, and the above sliding basket is a guide of a dishwasher rail device that is fixedly coupled to the inner wall of the dishwasher. It slides in the entry/exit direction by

However, when a conventional rail device is applied to a dishwasher, drainage is not smooth on the guide rail while the sliding basket is slid inside and out, causing unintended water to be discharged to the outside when the door is opened. have. In addition, foreign substances generated during the washing process of dishes, etc. may be caught in the rail, causing problems such as failure, and thus the cleanliness of the inside and outside of the dishwasher due to the rail device and reliability of operation are problematic.

In addition, since a strong pressure of water is applied to the inside of the dishwasher from various angles, movement and impact are generated in the sliding basket in the direction of one side of the guide rail. Accordingly, the rail device applied to the dishwasher needs to have a function of securing an amount of clearance between the left and right sides or absorbing the movement between the left and right in response to this.

Korean Patent Publication No. 10-1526153 (announced on May 4, 2015)

The present invention is to solve the problems of the prior art described above, and an object of the present invention is to have an open-type structure with an open lower end in order to solve the existing drainage problem, secure the amount of clearance on either side of the left and right, and can absorb width changes. It is to provide a rail device for a dishwasher including a guide rail having a structure that is there.

One aspect of the present invention is a guide body; An upper support roller portion coupled to one side of the guide body portion and rotatable about a central axis; A lower support roller part coupled to one side of the guide body part, rotatable about a central axis, and open outside in the axial direction; A guide rail portion having one side inserted into the space between the upper support roller portion and the lower support roller portion and extending along a sliding direction; And one side is inserted into the guide rail portion, the other side includes a rack roller portion coupled to one surface inside the dishwasher body or coupled to a sliding basket, wherein the guide rail portion has a shape corresponding to a circumference of the upper support roller portion The upper guide portion of the; And a lower guide portion corresponding to the periphery of the lower support roller portion and having an outer side open thereof, and a rail device for a dishwasher.

In one embodiment, the rack roller unit, the rack roller body is inserted into the inside of the guide rail unit, rotatable about a central axis; A rack member portion fixedly coupled to an inner surface of the dishwasher body; And a rack coupling part which penetrates and couples the center of the rack roller body part and one side of the rack member part, wherein the rack coupling part allows the rack roller part to be moved by a predetermined distance in the left and right direction, and the rack roller body part and It may be to combine the rack member in a spaced state.

In an embodiment, the rack roller unit comprises: a rack bearing unit having at least one bearing disposed in a space between an inner circumferential surface of the rack roller body unit and an outer circumferential surface of the rack coupling unit; And a rack bearing seating portion forming a space in which one or more bearings are seated along an outer circumferential surface of an end side accommodated in the rack roller body portion of the rack coupling portion.

In one embodiment, the rack bearing unit may be spaced apart from an inner peripheral surface of the rack roller body so that the rack roller unit can be moved by a predetermined distance in the left and right direction.

In one embodiment, the upper support roller portion, the first roller frame portion rotatable about a central axis, the circumferential surface is formed to correspond to the upper guide portion; And a first roller coupling portion coupled through a center of the first roller frame portion and one side of the guide body portion, wherein the first roller coupling portion allows the upper support roller portion to be moved by a predetermined distance in the left-right direction, It may be to couple the first roller frame portion and the guide body portion in a spaced state.

In one embodiment, the upper support roller unit includes: a first bearing unit having at least one bearing disposed in a space between an inner circumferential surface of the first roller frame unit and an outer circumferential surface of the first roller coupling unit; And a first bearing seating portion forming a space in which one or more bearings are seated along an outer peripheral surface of the end side accommodated in the first roller frame portion of the first roller coupling portion.

In an embodiment, the first bearing part and the upper support roller part may be spaced apart from the inner circumferential surface of the first roller frame part so as to be moved by a predetermined distance in the horizontal direction.

In one embodiment, the lower support roller portion, the second roller frame portion is rotatable about a central axis, the circumferential surface is formed to correspond to the lower guide portion; And a second roller coupling portion coupled through the center of the second roller frame portion and one side of the guide body portion, wherein the second roller coupling portion allows the lower support roller portion to be moved by a predetermined distance in the left-right direction, It may be to couple the second roller frame portion and the guide body portion in a spaced state.

In one embodiment, the lower support roller portion includes: a second bearing portion having at least one bearing disposed in a space between an inner peripheral surface of the second roller frame portion and an outer peripheral surface of the second roller coupling portion; And a second bearing seating portion forming a space in which one or more bearings are seated along an outer peripheral surface of the end side accommodated in the second roller frame portion of the second roller coupling portion.

In one embodiment, the second bearing part may be spaced apart from the inner circumferential surface of the second roller frame part so that the lower support roller part can be moved by a predetermined distance in the horizontal direction.

According to an aspect of the present invention, since a smooth drainage function is implemented according to the open rail structure at the lower end, problems such as trapping of foreign matter on the guide rail for a dishwasher or water flow when the door is opened, which may occur due to insufficient drainage Can be prevented.

In addition, structural stability and operational reliability of the dishwasher can be secured by responding to a change in width in the left and right directions occurring during the sliding of the dishwasher or during the operation.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view of a rail device for a dishwasher according to an embodiment of the present invention.
2 is a perspective view of FIG. 1 viewed from a different angle.
3 is a side view of a rail device for a dishwasher according to the present invention.
4 is a flow chart showing the sliding in the withdrawal direction of the rail device for a dishwasher according to the present invention.
Figure 5 (a) is a cross-sectional view of a rack roller unit according to an embodiment of the present invention.
Figure 5 (b) is a perspective view of the rack coupling unit according to an embodiment of the present invention.
6 (a) is a cross-sectional view of an upper support roller according to an embodiment of the present invention.
6(b) is a perspective view of a first bearing seating part according to an embodiment of the present invention.
7 (a) is a cross-sectional view of a lower support roller according to an embodiment of the present invention.
7 (b) is a perspective view of a second bearing seating part according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and therefore is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only "directly connected" but also "indirectly connected" with another member interposed therebetween. . In addition, when a part "includes" a certain component, it means that other components may be further provided, rather than excluding other components unless specifically stated to the contrary.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a rail device for a dishwasher according to an embodiment of the present invention, FIG. 2 is a perspective view of FIG. 1 viewed from a different angle, and FIG. 3 is a side view of the rail device for a dishwasher according to the present invention, and FIG. Is a flow chart showing the sliding in the drawing direction of the rail device for a dishwasher according to the present invention.

As shown, the rail device for a dishwasher according to the present invention includes a guide body part 100, an upper support roller part 400, a lower support roller part 500, a rack roller part 300, and a guide rail part 200. Consists of including.

The rail device for a dishwasher according to the present invention includes a first embodiment in which the guide body part 100 is integrally slid by being combined with a sliding basket, and the rack roller part 300 is connected to one surface inside the dishwasher. On the contrary, the guide body portion 100 may be coupled to an inner surface of the dishwasher, and the rack roller portion 300 may be combined with a sliding basket to be integrally slid.

Hereinafter, for convenience of explanation, it will be described based on the first embodiment of the present invention. However, it is natural that various embodiments to be described later may correspond to the second embodiment of the present invention and be similarly applied.

The guide body 100 is a member that is coupled to one side of a sliding basket that moves inside and outside the dishwasher and moves integrally with the sliding basket.

The guide body portion 100 has a relatively narrow width and a side thereof is coupled to one side of the sliding basket, and the upper support roller unit 400 and the lower support roller unit 500 are coupled to the opposite side. It may be provided with both sides having a predetermined cross-sectional area for.

The upper support roller part 400 and the lower support roller part 500 are each coupled to a position spaced apart from each other on one surface of the guide body part 100, and have an axis perpendicular to one surface of the guide body part 100 It may be formed in a cylindrical shape that can be rotated with a central axis.

The guide body part 100 and the sliding basket are supported by a load by the guide rail part 200 inserted into the space between the upper support roller part 400 and the lower support roller part 500 and at the same time slide Guided.

As shown, the upper support roller part 400 may have a concave groove having a predetermined depth along the circumferential direction of the central axis. The groove portion is formed to correspond to the upper guide portion 210 of the guide rail portion 200 to be described later.

In this case, the groove portions of the upper support roller part 400 according to an embodiment of the present invention may be formed to have a cross-section that gradually narrows along a depth direction while being symmetrical with respect to a center along a circumferential direction. In this case, since the groove portion surrounds the outer circumferential surface of the upper guide portion 210, the upper support roller portion 400 is fastened to the guide rail portion 200 and the load can be stably supported.

Meanwhile, the upper support roller part 400 may be formed in plural on one surface of the guide body part 100. In this case, the load of the sliding basket and the guide body part 100 may be supported in a distributed state according to the number and position of the plurality of upper support roller parts 400.

The lower support roller part 500 is characterized in that it is formed in an open structure in which the outside is opened along the axial direction. In more detail, the lower support roller part 500 may have a predetermined depth along the circumferential direction of the central axis, but may have a concave groove in the shape of which the outer side is open along the axial direction. Likewise, the concave portion of the lower support roller part 500 is formed to correspond to the lower guide part 220 of the guide rail part 200 to be described later.

This is to cope with that the lower guide part 220 of the guide rail part 200 to be described later is formed in an open structure in which the outside is opened, and a detailed description of the drainage function according thereto will be described later.

One side of the rack roller part 300 is inserted into the guide rail part 200 and the other side is fixedly coupled to one surface of an inner wall of the dishwasher body.

That is, one side of the rack roller part 300 is inserted into the rail of the guide rail part 200 to guide or stop the sliding basket in the entry and exit direction that moves integrally with the guide rail part 200. Plays a role.

The other side of the rack roller part 300 is fixedly coupled to one surface of an inner wall of the dishwasher and serves to support a load from the sliding basket. In particular, the rack roller unit 300 may be formed in plural in order to stably support the sliding basket. That is, the plurality of rack roller units 300 are formed to be spaced apart at a predetermined interval, and at this time, the angle formed by each of the rack roller units 300 determines the entry/exit direction of the sliding basket.

One side of the guide rail part 200 is inserted into a space between the upper support roller part 400 and the lower support roller part 500. At this time, the guide rail part 200 receives the load of the sliding basket by the upper support roller part 400, and the rack roller part 300 inserted into the rail of the guide rail part 200 Supported by

In addition, when the guide rail part 200 is constrained by the guide body part 100, it may move integrally, and the sliding basket must be formed to have a length that allows sufficient opening and closing.

More specifically, the guide rail part 200 may be formed to include an upper guide part 210, a lower guide part 220, a front locking part 240, and a rear locking part 250.

The front locking part 240 and the rear locking part 250 are formed at both front and rear ends of the guide rail part 200, respectively. The front locking part 240 and the rear locking part 250 serve to restrain the guide rail part 200 to the guide body part 100 and at the same time, the rack roller part inserted into the rail ( It collides with 300 and acts as a stopper to stop the sliding of the guide rail part 200.

In this case, the front locking part 240 and the rear locking part 250 have shapes that are caught by the upper support roller part 400 or the lower support roller part 500.

The front locking part 240 and the rear locking part 250 according to an embodiment of the present invention are a ring part protruding to surround the cylindrical shape of the upper support roller part 400 as shown through the drawing. It may include. In addition, the front locking part 240 and the rear locking part 250 may have various shapes that are caught by the upper support roller part 400 or the lower support roller part 500.

The upper guide part 210 is formed to correspond to the shape of the circumferential surface of the upper support roller part 400. In more detail, it may be formed to slide in a state corresponding to the groove formed along the circumference of the upper support roller part 400.

The lower guide part 220 is formed to correspond to the shape of the circumferential surface of the lower support roller part 500. In more detail, it slides in a state corresponding to the groove formed along the circumference of the lower support roller part 500, and, like the lower support roller part 500, is formed in an open-type structure with the outer side open along the axial direction. It is characterized by its main feature.

The guide rail part 200 according to an embodiment of the present invention may further include a stop guide part 230 connecting the upper guide part 210 and the lower guide part 220. The middle guide part 230 is formed in a shape bent so as to be spaced apart from the rack roller part 300 inserted into the guide rail part 200 at a predetermined interval, and the guide rail part 200 and the rack A hollow space (A) may be formed between the roller parts 300.

Hereinafter, a detailed operation method and function of the rail device for a dishwasher according to an embodiment of the present invention based on the above structure will be described in detail with reference to FIG. 4.

In a state in which the sliding basket is inserted into the dishwasher, one side (300a) of the rack roller part contacts the front locking part 240, and one side (400b) of the upper support roller part is formed of the rear locking part 250. It is positioned to contact the locking part. Thereafter, the sliding basket is slid in the withdrawal direction by the user's manipulation.

Thereafter, the guide body unit 100 integrally coupled with the sliding basket moves together in the withdrawal direction (P), and the front engages at the rear locking unit 250 side by the guidance of the guide rail unit 200. It slides toward the part 240 side. Thereafter, the other side 400a of the upper support roller part comes into contact with the locking part of the front locking part 240, so that the guide body part 100 and the guide rail part 200 are restrained.

Thereafter, the guide rail part 200 moves in the withdrawal direction Q by the guide body part 100 integrally with the sliding basket, and the rack roller part inserted into the rail of the guide rail part 200 The other side (300b) is close to the rear locking portion (250) side. Thereafter, when the other side 300b of the rack roller collides with the rear locking part 250, the sliding of the sliding basket is stopped, thereby preventing separation of the sliding basket from the dishwasher.

However, the sliding order of the guide body part 100 and the guide rail part 200 in the withdrawal process of the sliding basket is not limited as described above, and this sliding order is a specific dishwasher design to which the present invention is applied. It can be made variously depending on the structure or the degree of pulling when the user withdraws. For example, the guide body part 100 and the guide rail part 200 may slide at the same time from the initial withdrawal, or after the guide rail part 200 first starts sliding, the guide body part 100 Can be slid.

On the other hand, if the drainage function of the dishwasher rail device is not smooth during the withdrawal process of the sliding basket, as described above, a large amount of water used for washing dishes from the inside of the dishwasher is opened in a state where it is not drained. In addition, water may flow into the dishwasher, and foreign matters generated during the dishwashing process may be caught in the dishwasher rail device, causing frequent problems such as failure.

At this time, the rail device for a dishwasher of the present invention has an open structure in which the lower guide part 220 and the lower support roller part 500 are open to the outside, so that water inside and outside the guide rail part 200 is Not only can it be discharged smoothly, but it can be discharged immediately without any foreign matter inside the dishwasher being caught.

In addition, since a hollow open space (A) is formed between the interruption guide part 230 and the rack roller part 300 according to an embodiment of the present invention, a more smooth drainage function and a foreign matter discharge function can be provided. have.

Hereinafter, a function of securing and absorbing a clearance amount according to a width change between the left and right of the rail device for a dishwasher according to an embodiment of the present invention will be described with reference to FIGS. 5 to 7.

Figure 5 (a) is a cross-sectional view of the rack roller unit 300 according to an embodiment of the present invention, Figure 5 (b) is a perspective view of the rack coupling unit 330 according to an embodiment of the present invention, Figure 6 (a) is a cross-sectional view of an upper support roller part 400 according to an embodiment of the present invention, and FIG. 6 (b) is a perspective view of a first bearing seating part 440 according to an embodiment of the present invention, 7 (a) is a cross-sectional view of a lower support roller part 500 according to an embodiment of the present invention, and FIG. 7 (b) is a perspective view of a second bearing seating part 540 according to an embodiment of the present invention. Shows.

As shown in Figure 5, the rack roller unit 300 according to an embodiment of the present invention may include a rack roller body portion 310, a rack member portion 320, and a rack coupling portion 330. .

The rack roller body 310 guides the sliding of the guide rail part 200 while being inserted into the guide rail part 200. The rack roller body part 310 has a shape corresponding to the inner surface of the upper guide part 210 and the lower guide part 220, and the inside of the rack roller body part 310 is coupled to the rack coupling part 330 along a central axis. It can be formed through.

One side of the rack member 320 is fixedly coupled to the inner wall of the dishwasher body and supports a load. More specifically, the rack member portion 320 according to an embodiment of the present invention has a bent shape in which a central portion protrudes from an outer portion to a predetermined height, and the rack coupling portion 330 is coupled through the central portion. In this case, the outer portion of the rack member part 320 may be coupled to the inner wall of the dishwasher body. However, the shape of the rack member 320 is not limited to the above bending shape, and it is natural that various shapes may be applied.

The rack coupling part 330 is partially formed inside the rack roller body part 310, penetrates the central axis of the rack roller body part 310 and the center of the rack member part 320, The rack roller body 310 and the rack member 320 are coupled. At this time, the rack coupling portion 330 is a state spaced apart from the rack roller body portion 310 and the rack member portion 320 so that the rack roller portion 300 can be moved by a predetermined distance in the left and right direction. It characterized in that it is combined with.

That is, as shown in Fig. 5 (a), the rack roller unit 300 is spaced apart from the rack coupling unit 330 and the rack roller body unit 310 so as to form a predetermined width that can be moved in the left and right direction. By doing so, the rack roller unit 300 may absorb a movement or impact in the left and right directions from the sliding basket.

To this end, the rack coupling portion 330 is preferably formed such that a cross-sectional area of a portion penetrating the rack roller body portion 310 is larger than a cross-sectional area of a portion penetrating the rack member portion 320.

The rack roller unit 300 according to an embodiment of the present invention is characterized in that it further includes a rack bearing unit 340 and a rack bearing seating unit 350.

As shown in (b) of Figure 5, the rack bearing seating portion 350 is along the outer circumferential surface of the end side accommodated in the rack roller body portion 310 of the rack coupling portion 330, at least one bearing It is formed in a structure that can be seated.

The rack bearing part 340 is a bearing that is seated on the rack bearing seating portion 350, in a space between the inner peripheral surface of the rack roller body portion 310 and the outer peripheral surface of the rack coupling portion 330, the rack coupling One or more are disposed along the outer peripheral surface of the portion 330. The rack bearing unit 340 may absorb a movement or impact in the left and right directions of the sliding basket in the bearing itself.

To the same effect, the inner circumferential surfaces of the rack bearing unit 340 and the rack roller body unit 310 according to an embodiment of the present invention are so that the rack roller unit 300 can be moved by a predetermined distance in the horizontal direction. It is characterized in that it is formed to be spaced apart.

As shown in FIG. 6, the upper support roller part 400 according to an embodiment of the present invention may include a first roller frame part 410 and a first roller coupling part 420.

The first roller frame part 410 is formed with a groove part corresponding to the shape of the upper guide part 210 along the circumferential direction on the outer circumferential surface, and can be rotated about a central axis, It is sliding.

A part of the first roller coupling part 420 is accommodated in the first roller frame part 410, and a central axis of the first roller frame part 410 and one side of the guide body part 100 Through penetration, the first roller frame part 410 and the guide body part 100 are coupled. In addition, the first roller coupling portion 420 serves as a rotation axis of the first roller frame portion 410.

At this time, the first roller coupling portion 420 is the first roller frame portion 410 and the guide body portion 100 so that the upper support roller portion 400 can be moved by a predetermined distance in the left and right direction. It characterized in that it is combined in a spaced state.

That is, as shown in (a) of FIG. 6, the guide body part 100 and the first roller frame part 410 to form a predetermined width in which the upper support roller part 400 can move in the horizontal direction. By spaced apart from each other, the upper support roller part 400 may absorb a horizontal movement or impact from the sliding basket.

To this end, the first roller coupling portion 420 is preferably formed such that a cross-sectional area of a portion penetrating through the first roller frame portion 410 is larger than a cross-sectional area of a portion penetrating one side of the guide body portion 100 something to do.

The upper support roller part 400 according to an embodiment of the present invention may further include a first bearing part 430 and a first bearing seating part 440.

As shown in (b) of FIG. 6, the first bearing seating portion 440 is along the outer peripheral surface of the end side accommodated in the first roller frame portion 410 of the first roller coupling portion 420, It is formed in a structure in which one or more bearings are seated.

The first bearing part 430 is a bearing mounted on the first bearing mounting part 440, and a space between the inner circumferential surface of the first roller frame part 410 and the outer circumferential surface of the first roller coupling part 420 In, at least one is disposed along the outer peripheral surface of the first roller coupling portion 420. In this case, the first bearing part 430 may absorb a movement or impact in the left and right directions of the sliding basket in the bearing itself.

To the same effect, the inner circumferential surfaces of the first bearing part 430 and the first roller frame part 410 according to an embodiment of the present invention are moved by a predetermined distance in the left-right direction of the upper support roller part 400 It is characterized in that it is formed to be spaced apart.

As shown in FIG. 7, the lower support roller part 500 according to an embodiment of the present invention may include a second roller frame part 510 and a second roller coupling part 520.

The second roller frame part 510 has an outer circumferential surface corresponding to the lower guide part 220 along a circumferential direction, and an outer side along the axial direction has an open groove part of an open structure. In addition, it can be rotated about a central axis, so that it slides along the guide rail part 200.

Part of the second roller coupling part 520 is accommodated inside the second roller frame part 510, and the central axis of the second roller frame part 510 and one side of the guide body part 100 Through it, the second roller frame portion 510 and the guide body portion 100 are coupled. In addition, the second roller coupling portion 520 serves as a rotation axis of the second roller frame portion 510.

At this time, the second roller coupling portion 520 is the second roller frame portion 510 and the guide body portion 100 so that the lower support roller portion 500 can be moved by a predetermined distance in the left and right direction. It characterized in that it is combined in a spaced state.

That is, as shown in (a) of FIG. 7, the guide body portion 100 and the second roller frame portion 510 to form a predetermined width in which the lower support roller portion 500 can move in the left and right direction. By spaced apart from each other, the lower support roller part 500 may absorb a horizontal movement or impact from the sliding basket.

To this end, the second roller coupling portion 520 is preferably formed such that a cross-sectional area of a portion penetrating through the second roller frame portion 510 is larger than a cross-sectional area of a portion penetrating one side of the guide body portion 100. something to do.

The lower support roller part 500 according to an embodiment of the present invention is characterized in that it further includes a second bearing part 530 and a second bearing seating part 540.

As shown in (b) of FIG. 7, the second bearing seating portion 540 is along the outer peripheral surface of the second roller coupling portion 520 at the end side received inside the second roller frame portion 510, It is formed in a structure in which one or more bearings are seated.

The second bearing part 530 is a bearing that is mounted on the second bearing mounting part 540, and is a space between the inner circumferential surface of the second roller frame part 510 and the outer circumferential surface of the second roller coupling part 520 In, at least one is disposed along the outer peripheral surface of the second roller coupling portion 520. The second bearing part 530 may absorb the movement or impact of the sliding basket in the left and right directions in the bearing itself.

To the same effect, the inner circumferential surfaces of the second bearing part 530 and the second roller frame part 510 according to an embodiment of the present invention are moved by a predetermined distance in the left-right direction of the lower support roller part 500 It is characterized in that it is formed to be spaced apart.

The rail device for a dishwasher according to the present invention can secure a sufficient amount of clearance between the left and right sides in response to the movement of the sliding basket in the horizontal direction, which is inevitable due to the characteristics of the dishwasher through the above structure. In addition, through the bearing structure, the bearing itself can absorb a change of up to 2mm in the left and right width direction, thereby ensuring high structural stability and reliability in operation compared to the existing dishwasher rail.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and the concept of equivalents thereof should be construed as being included in the scope of the present invention.

1: rail device for dishwasher
100: guide body
200: part of guide rail
210: upper guide portion
220: lower guide part
230: middle guide part
240: front locking portion
250: rear locking portion
300: rack roller unit
310: rack roller body
320: rack member
330: rack coupling part
340: rack bearing part
350: rack bearing seat
400: upper support roller part
410: first roller frame portion
420: first roller coupling portion
430: first bearing part
450: first bearing seating portion
500: lower support roller part
510: second roller frame portion
520: second roller coupling portion
530: second bearing part
540: second bearing seating portion

Claims (10)

Guide body;
An upper support roller portion coupled to one side of the guide body portion and rotatable about a central axis;
A lower support roller part coupled to one side of the guide body part, rotatable about a central axis, and open outside in the axial direction;
A guide rail part having one side inserted into the space between the upper support roller part and the lower support roller part and extending along a sliding direction; And
One side is inserted into the guide rail portion, the other side includes a rack roller portion coupled to one surface inside the dishwasher body or coupled to a sliding basket,
The guide rail part,
An upper guide portion having a shape corresponding to the circumference of the upper support roller portion; And
A rail device for a dishwasher that corresponds to the circumference of the lower support roller part and includes a lower guide part that is open to the outside. The method of claim 1,
The rack roller part,
A rack roller body unit inserted into the guide rail unit and rotatable about a central axis;
A rack member portion fixedly coupled to an inner surface of the dishwasher body; And
It includes a rack coupling portion coupled through the center of the rack roller body portion and one side of the rack member portion,
The rack coupling unit, characterized in that the rack roller unit and the rack member are coupled in a spaced state so that the rack roller unit can be moved by a predetermined distance in the left and right direction. The method of claim 2,
The rack roller part,
A rack bearing unit having at least one bearing disposed in a space between an inner circumferential surface of the rack roller body unit and an outer circumferential surface of the rack coupling unit; And
And a rack bearing seating portion forming a space in which one or more bearings are seated along an outer peripheral surface of an end side accommodated in the rack roller body portion of the rack coupling portion. The method of claim 3,
The rack bearing unit, characterized in that spaced apart from the inner circumferential surface of the rack roller body unit so that the rack roller unit can be moved by a predetermined distance in the left and right direction. The method of claim 1,
The upper support roller part,
A first roller frame portion rotatable about a central axis, and having a circumferential surface corresponding to the upper guide portion; And
And a first roller coupling portion coupled through a center of the first roller frame portion and one side of the guide body portion,
The first roller coupling part is characterized in that the first roller frame part and the guide body part are separated from each other so that the upper support roller part can be moved by a predetermined distance in the left and right direction. . The method of claim 5,
The upper support roller part,
A first bearing portion having at least one bearing disposed in a space between an inner peripheral surface of the first roller frame portion and an outer peripheral surface of the first roller coupling portion; And
The rail device for a dishwasher, further comprising: a first bearing seating portion forming a space in which one or more bearings are seated along an outer circumferential surface of the end side accommodated in the first roller frame portion of the first roller coupling portion. The method of claim 6,
The rail device for a dishwasher, characterized in that spaced apart from the inner circumferential surface of the first roller frame part so that the first bearing part and the upper support roller part can be moved by a predetermined distance in the left-right direction. The method of claim 1,
The lower support roller part,
A second roller frame portion rotatable about a central axis, and having a circumferential surface corresponding to the lower guide portion; And
And a second roller coupling portion coupled through the center of the second roller frame portion and one side of the guide body portion,
The second roller coupling part is characterized in that the second roller frame part and the guide body part are separated from each other so that the lower support roller part can be moved by a predetermined distance in the left and right direction. . The method of claim 8,
The lower support roller part,
A second bearing portion having at least one bearing disposed in a space between an inner peripheral surface of the second roller frame portion and an outer peripheral surface of the second roller coupling portion; And
The rail device for a dishwasher, further comprising a second bearing seating portion forming a space in which one or more bearings are seated along an outer circumferential surface of the end side accommodated in the second roller frame portion of the second roller coupling portion. The method of claim 9,
The second bearing part is spaced apart from the inner circumferential surface of the second roller frame part so that the lower support roller part can be moved by a predetermined distance in the left-right direction.

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