Dishwasher rail system

Abstract

One embodiment of the present invention provides a track device for a dishwasher, comprising: a guide body; an upper support roller part, which is coupled to one side of the guide body and can rotate with a central axis as a reference; a lower support roller part, which is coupled to one side of the guide body and can rotate with a central axis as a reference; a guide rail part, which is extended along the sliding direction in a state where one side is inserted into the space between the upper support roller part and the lower support roller part; and a rack roller part, which is inserted into the inside of the guide rail part on one side and coupled to one side of the inside of the dishwasher body or to a sliding cutlery basket on the other side. The rack roller part comprises: a rack roller body part, which is inserted into the inside of the guide rail part and can rotate with a central axis as a reference; a rack component part, which is fixedly coupled to one side of the inside 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 component part; wherein the rack coupling part couples the rack roller body part and the rack component part in a spaced state, so that the rack roller part can move a predetermined distance in the left and right direction.

Description

Technical Field

[0001] The present invention relates to a rail device for a dishwasher, and more particularly to a rail device for a dishwasher having a structure for ensuring that a gap between left and right sides can absorb the movement change in the width direction of a sliding cutlery basket. Background Art

[0002] A dishwasher is a kitchen appliance that automatically washes and dries dishes, cups, spoons, chopsticks, etc. It works on the principle of using a strong water jet to wash dishes while soaking food residues with hot steam and detergent, and its performance is usually evaluated by whether it can fully spray high-pressure water to wash away food residues.

[0003] As a household appliance that improves the convenience of life and reduces the time spent on housework, dishwashers as described above, like existing air purifiers, dryers, and clothing management equipment, have seen a sharp increase in sales worldwide, including in Korea.

[0004] Dishes, spoons, chopsticks and the like to be cleaned by the dishwasher can be put into a sliding cutlery basket that slides inside and outside the dishwasher. The sliding cutlery basket can slide in an in-and-out direction under the guidance of a dishwasher track device fixedly coupled to the inner wall of the dishwasher.

[0005] However, when the conventional rail device is applied to a dishwasher, high-pressure water jets are sprayed from various angles inside the dishwasher, so that left and right movements and impacts occur in the single direction of the sliding cutlery basket to the guide rail. Therefore, in response to this, the rail device applied to the dishwasher needs to have a function of ensuring a gap between the left and right sides or absorbing the left and right movements.

[0006] Prior art literature

[0007] (Patent Document 1) Korean Patent Publication No. 10-1158584 (2012.06.14) Summary of the invention

[0008] (Technical Issues)

[0009] The present invention is used to solve the above-mentioned problems of the prior art. The object of the present invention is to provide a rail device for a dishwasher, which has a structure that ensures that the gap between the left and right sides can absorb the movement change in the width direction of the sliding cutlery basket.

[0010] (Technical solution)

[0011] In order to achieve the above-mentioned problem, one aspect of the present invention provides a track device for a dishwasher, comprising: a guide body; an upper support roller part, which is combined with one side of the guide body and can rotate with the central axis as the reference; a lower support roller part, which is combined with one side of the guide body and can rotate with the central axis as the reference; a guide rail part, which is extended along the sliding direction in a state where one side is inserted into the space between the upper support roller part and the lower support roller part; and a rack roller part, which is inserted into the inside of the guide rail part on one side and combined with one side of the inside of the dishwasher body or combined with a sliding cutlery basket on the other side. The rack roller part comprises: a rack roller body part, which is inserted into the inside of the guide rail part and can rotate with the central axis as the reference; a rack component part, which is fixedly combined with one side of the inside 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 component part; wherein the rack coupling part couples the rack roller body part and the rack component part in a spaced state, so that the rack roller part can move a predetermined distance in the left and right direction.

[0012] According to an embodiment of the present invention, the rail device for a dishwasher may have the following characteristics: a bearing ball is provided inside at least one of the upper support roller portion, the lower support roller portion, and the rack roller portion.

[0013] According to one embodiment of the present invention, the rail device for a dishwasher may have the following characteristics: one or more bearing balls are arranged in the space between the inner circumference of the rack roller main body and the outer circumference of the rack joint, and the bearing balls are spaced from the inner circumference of the rack roller main body so that the rack roller can move a predetermined distance in the left and right directions.

[0014] According to an embodiment of the present invention, the rail device for a dishwasher may have the following characteristics: a rail portion on which the bearing ball can be placed is arranged on either the inner circumferential surface of the rack roller body or the outer circumferential surface of the rack coupling portion.

[0015] According to one embodiment of the present invention, the track device for a dishwasher may be as follows, comprising: a guide body; an upper support roller portion, which is coupled to one side of the guide body and can rotate with the central axis as a reference; a lower support roller portion, which is coupled to one side of the guide body and can rotate with the central axis as a reference; a guide rail portion, which is formed by extending along the sliding direction in a state where one side is inserted into the space between the upper support roller portion and the lower support roller portion; and a rack roller portion, one side of which is inserted into the inside of the guide rail portion and the other side of which is coupled to one side of the inside of the dishwasher body or to the sliding cutlery basket. The rack roller portion includes: a rack roller body portion, which is inserted into the inside of the guide rail portion and can rotate with the central axis as a reference; a rack component portion, which is fixedly coupled to one side of the inside of the dishwasher body; and a rack coupling portion, which penetrates and couples the center of the rack roller body portion and one side of the rack component portion. Among them, the upper support roller portion includes: a first roller frame portion, which can rotate with the central axis as a reference, and is formed so that the surrounding surface corresponds to the upper end guide portion of the guide rail portion; and a first roller coupling portion, which passes through and couples the center of the first roller frame portion and one side of the guide body portion; wherein the first roller coupling portion couples the first roller frame portion and the guide body portion in a spaced state so that the upper support roller portion can move a predetermined distance in the left and right directions.

[0016] According to an embodiment of the present invention, the rail device for a dishwasher may have the following characteristics: a bearing ball is provided inside at least one of the upper support roller portion, the lower support roller portion, and the rack roller portion.

[0017] According to one embodiment of the present invention, it may be a track device for a dishwasher having the following characteristics: one or more bearing balls are arranged in the space between the inner circumference of the first roller frame portion and the outer circumference of the first roller joint portion, and the bearing balls are spaced from the inner circumference of the first roller frame portion so that the upper support roller portion moves a predetermined distance in the left and right directions.

[0018] According to an embodiment of the present invention, the track device for a dishwasher may have the following characteristics: a track portion on which the bearing ball can be placed is arranged on either the inner circumferential surface of the first roller frame portion or the outer circumferential surface of the first roller coupling portion.

[0019] According to one embodiment of the present invention, the track device for a dishwasher may be as follows, comprising: a guide body; an upper support roller portion, which is coupled to one side of the guide body and can rotate with the central axis as a reference; a lower support roller portion, which is coupled to one side of the guide body and can rotate with the central axis as a reference; a guide rail portion, which is formed by extending along the sliding direction in a state where one side is inserted into the space between the upper support roller portion and the lower support roller portion; and a rack roller portion, one side of which is inserted into the inside of the guide rail portion and the other side of which is coupled to one side of the inside of the dishwasher body or to the sliding cutlery basket. The rack roller portion includes: a rack roller body portion, which is inserted into the inside of the guide rail portion and can rotate with the central axis as a reference; a rack component portion, which is fixedly coupled to one side of the inside of the dishwasher body; and a rack coupling portion, which penetrates and couples the center of the rack roller body portion and one side of the rack component portion. Among them, the lower side support roller portion includes: a second roller frame portion, which can rotate with the central axis as a reference, and is formed so that the surrounding surface corresponds to the lower end guide portion of the guide rail portion; and a second roller coupling portion, which passes through and couples the center of the second roller frame portion and one side of the guide body portion; wherein the second roller coupling portion couples the second roller frame portion and the guide body portion in a spaced state so that the lower side support roller portion moves a predetermined distance in the left and right directions.

[0020] According to an embodiment of the present invention, the rail device for a dishwasher may have the following characteristics: a bearing ball is provided inside at least one of the upper support roller portion, the lower support roller portion, and the rack roller portion.

[0021] According to one embodiment of the present invention, the track device for a dishwasher may have the following characteristics: one or more bearing balls are arranged in the space between the inner circumference of the second roller frame portion and the outer circumference of the second roller joint portion, and the bearing balls are spaced from the inner circumference of the second roller frame portion so that the lower support roller portion can move a predetermined distance in the left and right directions.

[0022] According to an embodiment of the present invention, the track device for a dishwasher may have the following characteristics: a track portion on which the bearing ball can be placed is arranged on either the inner circumferential surface of the second roller frame portion or the outer circumferential surface of the second roller coupling portion.

[0023] (Technical Effect)

[0024] According to one aspect of the present invention, the structural stability and operational reliability of the dishwasher can be ensured in response to the sliding of the inside and outside of the dishwasher or the width change in the left and right directions during the operation.

[0025] In addition, a track portion for placing bearings is arranged on the outer peripheral surface of the shaft of the rack roller portion and the support roller portion. Therefore, even without a separate retainer for holding the bearings, the rack roller portion and the support roller portion can rotate smoothly, improving operability, reducing the number of parts, and saving manufacturing costs.

[0026] The effects of the present invention should be understood to include not only the effects described above but also all effects that can be inferred from the detailed description of the present invention or the inventive structure described in the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a perspective view of a rail device for a dishwasher according to an embodiment of the present invention.

[0028] Figure 2 From another perspective Figure 1 Stereoscopic diagram.

[0029] Figure 3 The present invention is a flow chart showing that the rail device for a dishwasher according to an embodiment of the present invention slides in the lead-out direction.

[0030] Figure 4 1 is a side view of a rail device for a dishwasher according to an embodiment of the present invention.

[0031] Figure 5 (a) and (b) are respectively a cross-sectional view of a rack roller portion and a stereoscopic view of a rack coupling portion according to an embodiment of the present invention.

[0032] Figure 6 (a) and (b) are respectively a cross-sectional view of an upper support roller portion and a perspective view of a first roller coupling portion according to an embodiment of the present invention.

[0033] Figure 7 (a) and (b) are respectively a cross-sectional view of a lower support roller portion and a perspective view of a second roller coupling portion according to an embodiment of the present invention.

[0034] (Explanation of Reference Numerals)

[0035] 1000: Dishwasher rail device

[0036] 100: Guide the main body

[0037] 200: Guide rail

[0038] 210: Upper guide

[0039] 220: Lower end guide

[0040] 230: Middle section guide

[0041] 240: Front stopper

[0042] 250: Rear stopper

[0043] 300: Rack roller

[0044] 310: Rack roller main body

[0045] 320: Rack components

[0046] 330: Rack joint

[0047] 340: Bearing ball

[0048] 400: Upper support roller

[0049] 410: First roller frame

[0050] 420: First roller joint

[0051] 430: Bearing ball

[0052] 500: Lower support roller

[0053] 510: Second roller frame

[0054] 520: Second roller joint

[0055] 530: Bearing ball DETAILED DESCRIPTION

[0056] Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention can be implemented in various forms and is not limited to the embodiments described herein. Then, in order to clearly illustrate the present invention, parts not related to the description are omitted in the accompanying drawings, and similar parts are given similar reference numerals throughout the specification.

[0057] Throughout the specification, when a part is "connected" to another part, this includes not only the case of "direct connection" but also the case of "indirect connection" with other components arranged in between. In addition, when a part "includes" a certain component, unless there is a special record to the contrary, other components are not excluded, but other constituent elements may also be present.

[0058] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0059] Figure 1 is a perspective view of a track device for a dishwasher according to an embodiment of the present invention, Figure 2 From another perspective Figure 1 A stereogram of Figure 3 is a flow chart showing the sliding of the rail device for a dishwasher in the guide direction according to one embodiment of the present invention. Figure 4 1 is a side view of a rail device for a dishwasher according to an embodiment of the present invention.

[0060] like Figures 1 to 4 As shown, the rail device 1000 for a dishwasher of the present invention includes: a guide body portion 100 , an upper support roller portion 400 , a lower support roller portion 500 , a rack roller portion 300 , and a guide rail portion 200 .

[0061] The track device 1000 for a dishwasher of the present invention can be implemented by a first embodiment and a second embodiment. The first embodiment is a form in which the guide body 100 is combined with a sliding cutlery basket to slide integrally and the rack roller portion 300 is combined with one side inside the dishwasher. The second embodiment is opposite to the first embodiment, in which the guide body 100 is combined with one side inside the dishwasher and the rack roller portion 300 is combined with the sliding cutlery basket to slide integrally.

[0062] For the sake of convenience, the following description will be based on the first embodiment of the present invention, but the various embodiments described below are also applicable to the second embodiment of the present invention.

[0063] The guide body 100 is a member coupled to one side of a sliding cutlery basket that moves inside and outside the dishwasher to move integrally with the sliding cutlery basket.

[0064] The guide body 100 may have a relatively thin width and double sides with a predetermined cross-sectional area, so as to be coupled with one side of the sliding cutlery basket on one side of the width and coupled with the upper supporting roller 400 and the lower supporting roller 500 on the opposite side.

[0065] The upper support roller 400 and the lower support roller 500 are respectively coupled to one surface of the guide body 100 at positions spaced apart from each other and may be formed in a cylindrical shape rotatable about an axis perpendicular to one surface of the guide body 100 .

[0066] The guide rail part 200 that guides the main body part 100 and the sliding cutlery basket is inserted into a space between the upper supporting roller part 400 and the lower supporting roller part 500 and guides the sliding of the cutlery basket while supporting a load.

[0067] As shown in the figure, the upper supporting roller part 400 may form a groove part having a predetermined depth in a circumferential direction along the central axis. The groove part is formed to correspond to the upper end guide part 210 of the guide rail part 200 described later.

[0068] At this time, the groove portion of the upper support roller portion 400 of one embodiment of the present invention can be formed to be symmetrical with respect to the center along the peripheral direction and have a cross-section that gradually narrows along the depth direction. In this case, the groove portion surrounds the outer peripheral surface of the upper end guide portion 210, so that the upper support roller portion 400 can stably support the load while being fastened to the guide rail portion 200.

[0069] On the other hand, a plurality of upper support rollers 400 may be formed on one surface of the guide body 100. In this case, the load of the sliding cutlery basket and the guide body 100 may be supported in a dispersed state according to the number and positions of the plurality of upper support rollers 400.

[0070] Likewise, the lower supporting roller portion 500 may be formed with a groove portion having a predetermined depth along the circumferential direction of the central axis. The groove portion may be formed to correspond to a lower end guide portion 220 of the guide rail portion 200 described later.

[0071] At this time, the groove portion of the lower support roller portion 500 of one embodiment of the present invention can be formed to be symmetrical with respect to the center along the peripheral direction and have a cross-section that gradually narrows along the depth direction. In this case, the groove portion surrounds the outer peripheral surface of the lower end guide portion 220, so that the lower support roller portion 500 can stably support the load while being fastened to the guide rail portion 200.

[0072] One side of the rack roller portion 300 is inserted into the guide rail portion 200 , and the other side is fixedly coupled to one side of the inner wall of the dishwasher body.

[0073] That is, one side of the rack roller portion 300 is inserted into the track of the guide rail portion 200 to guide or stop the sliding cutlery basket moving integrally with the guide rail portion 200 from sliding in the in-and-out direction.

[0074] The other side of the rack roller 300 is fixedly coupled to one side of the inner wall of the dishwasher, and plays a role in supporting the load from the sliding cutlery basket. In particular, in order to stably support the sliding cutlery basket, a plurality of the rack rollers 300 may be formed. That is, the plurality of rack rollers 300 are spaced apart at a predetermined interval, and the angle formed by each of the rack rollers 300 determines the in and out direction of the sliding cutlery basket.

[0075] One side of the rail part 200 is inserted into the space between the upper support roller part 400 and the lower support roller part 500. At this time, the rail part 200 receives the load of the sliding cutlery basket through the upper support roller part 400 and is supported by the rack roller part 300 inserted into the track of the rail part 200.

[0076] The guide rail portion 200 may be integrally movable while being restrained by the guide body portion 100 , and should be formed to have a sufficient length to open and close the sliding cutlery basket.

[0077] More specifically, the guide rail portion 200 may include an upper guide portion 210 , a lower guide portion 220 , a front stop portion 240 , and a rear stop portion 250 .

[0078] The front stopper 240 and the rear stopper 250 are respectively formed at the front and rear ends of the guide rail 200. The front stopper 240 and the rear stopper 250 play the role of restraining the guide rail 200 to the guide body 100, and at the same time, they collide with the rack roller 300 inserted into the rail to play the role of a stopper to stop the guide rail 200 from sliding.

[0079] At this time, the front locking portion 240 and the rear locking portion 250 include a shape that is locked to the upper support roller portion 400 or the lower support roller portion 500 .

[0080] As shown in the figure, the front stopper 240 and the rear stopper 250 of one embodiment of the present invention may include a hook portion protrudingly formed to wrap the cylindrical shape of the upper support roller 400. In addition, the front stopper 240 and the rear stopper 250 may also be applicable to various shapes that are caught by the upper support roller 400 or the lower support roller 500.

[0081] On the other hand, as shown in the drawings, the guide rail portion 200 may be formed into a structure having a “C” shaped cross section.

[0082] The upper end guide portion 210 is formed to correspond to the shape of the peripheral surface of the upper support roller portion 400 , and is configured to slide in a state corresponding to a groove portion formed along the periphery of the upper support roller portion 400 .

[0083] At this time, the upper end guide portion 210 is configured to be connected to the upper portion of the middle stage guide portion 230 to be described later.

[0084] The lower end guide portion 220 is formed to be mounted on the peripheral surface of the lower support roller portion 500 , and is configured to slide while being mounted on a groove portion formed along the periphery of the lower support roller portion 500 .

[0085] Likewise, the lower end guide portion 220 is configured to be connected to a lower portion of a middle stage guide portion 230 to be described later.

[0086] The guide rail portion 200 of one embodiment of the present invention may further include a middle guide portion 230, and the middle guide portion 230 connects the upper guide portion 210 and the lower guide portion 220. The middle guide portion 230 and the rack roller portion 300 inserted into the guide rail portion 200 are spaced apart by a predetermined distance, so that a predetermined gap may be formed between the guide rail portion 200 and the rack roller portion 300.

[0087] As such, since a predetermined gap is formed between the middle guide portion 230 and the rack roller portion 300 according to an embodiment of the present invention, a smoother drainage function can be ensured.

[0088] Below, through Figure 2 The specific operation and function of the track device 1000 for a dishwasher according to an embodiment of the present invention based on the above structure will be described in detail.

[0089] When the sliding cutlery basket is inserted into the dishwasher, one side 300a of the rack roller part contacts the front stopper 240, and one side 400b of the upper support roller part contacts the stopper portion of the rear stopper 250. Thereafter, the sliding cutlery basket is slid in the guide direction by the user's operation.

[0090] Then, the guide body 100 integrated with the sliding cutlery basket moves in the leading-out direction together, and slides from the rear stopper 250 side to the front stopper 240 side under the guidance of the guide rail 200. Then, the other side 400a of the upper support roller part contacts the stopper portion of the front stopper 240, thereby constraining the guide body 100 and the guide rail 200.

[0091] Then, the guide rail part 200 moves in the guide direction together with the sliding cutlery basket through the guide body part 100, and the other side 300b of the rack roller part inserted into the track of the guide rail part 200 approaches the side of the rear stopper 250. Then, the other side 300b of the rack roller part collides with the rear stopper 250, thereby stopping the sliding of the sliding cutlery basket and preventing the sliding cutlery basket from being separated from the dishwasher.

[0092] However, the sliding order of the guide body 100 and the guide rail 200 during the export of the sliding cutlery basket is not limited to the above, but such a sliding order can be variously set according to the specific design structure of the dishwasher to which the present invention is applied or the pulling degree of the user when pulling out. For example, the guide body 100 and the guide rail 200 can slide at the same time when initially pulled out, or the guide body 100 can slide after the guide rail 200 starts to slide first.

[0093] Figure 5 (a) and (b) are respectively a cross-sectional view of a rack roller portion and a stereoscopic view of a rack coupling portion according to an embodiment of the present invention.

[0094] like Figure 5 As shown, the rack roller portion 300 according to an embodiment of the present invention may include a rack roller body portion 310 , a rack component portion 320 and a rack coupling portion 330 .

[0095] The rack roller body 310 guides the sliding of the guide rail 200 while being inserted into the guide rail 200. The rack roller body 310 has a shape that can be inserted between the upper guide 210 and the lower guide 220, and can penetrate the inside to be connected to the rack coupling part 330 along the central axis.

[0096] The rack component part 320 is a structure that is fixed and combined with the inner wall of the dishwasher body on one side and supports the load. More specifically, the rack component part 320 of one embodiment of the present invention is formed into a curved shape with the center protruding from the outer contour by a predetermined height, and the rack coupling part 330 is connected through the center. At this time, the outer contour of the rack component part 320 can be combined with the inner wall of the dishwasher body. However, the shape of the rack component part 320 is not limited to the curved shape, and various shapes can be applied in addition to this.

[0097] The rack coupling part 330 is partially formed inside the rack roller body part 310, and penetrates the central axis of the rack roller body part 310 and the central part of the rack member part 320 to couple the rack roller body part 310 and the rack member part 320. At this time, the present invention is characterized in that the rack coupling part 330 couples the rack roller body part 310 and the rack member part 320 in a spaced state so that the rack roller part 300 can move a predetermined distance in the left-right direction.

[0098] That is, Figure 5 As shown, since the rack coupling portion 330 and the rack roller body portion 310 are spaced apart to form a predetermined width for the rack roller portion 300 to move in the left and right directions, the rack roller portion 300 can absorb left and right side movements or impacts from the sliding cutlery basket.

[0099] To this end, the rack coupling portion 330 is preferably formed such that the cross-sectional area of ​​the portion penetrating the rack roller body portion 310 is larger than the cross-sectional area of ​​the portion penetrating the rack member portion 320 .

[0100] A feature of the present invention is that the rack roller portion 300 according to an embodiment of the present invention further includes a bearing ball 340 .

[0101] One or more bearing balls 340 are arranged along the outer circumference of the rack coupling part 330 in the space between the inner circumference of the rack roller body 310 and the outer circumference of the rack coupling part 330. The bearing balls 340 can absorb the left-right movement or impact of the sliding cutlery basket.

[0102] With the same purpose, the present invention is characterized in that the bearing ball 340 of one embodiment of the present invention is spaced apart from the inner circumference of the rack roller body 310 so that the rack roller 300 can move a predetermined distance in the left-right direction.

[0103] On the other hand, according to one embodiment, a track portion W on which the bearing ball 340 can be placed can be disposed on any one of the inner circumferential surface of the rack roller body portion 310 and the outer circumferential surface of the rack coupling portion 330 .

[0104] When the bearing ball 340 is placed on the track portion W, the bearing ball 340 is in point contact with the inner circumference of the rack roller body portion 310 or the outer circumference of the rack coupling portion 330 to stably perform the bearing function. Therefore, even without a separate retainer component, the operability of the rack roller portion 300 can be improved, the number of parts can be saved, and the manufacturing cost can be saved.

[0105] In addition, since the track portion W is formed on either the inner circumferential surface of the rack roller body portion 310 or the outer circumferential surface of the rack coupling portion 330 , it is possible to prevent the bearing ball 340 from being embedded in the track portion W and reducing the running performance.

[0106] Figure 6 (a) and (b) are respectively a cross-sectional view of an upper support roller portion and a perspective view of a first roller coupling portion according to an embodiment of the present invention.

[0107] like Figure 6 As shown, the upper supporting roller portion 400 according to an embodiment of the present invention may include a first roller frame portion 410 and a first roller coupling portion 420 .

[0108] The first roller frame portion 410 is a groove portion having a shape corresponding to the upper end guide portion 210 formed on the outer circumferential surface along the circumferential direction, and can rotate with the central axis as a reference, and can slide along the guide rail portion 200 .

[0109] The first roller coupling portion 420 is partially accommodated in the first roller frame portion 410, and passes through the central axis of the first roller frame portion 410 and one side of the guide body portion 100 to couple the first roller frame portion 410 and the guide body portion 100. In addition, the first roller coupling portion 420 serves as a rotation axis of the first roller frame portion 410.

[0110] At this time, the present invention is characterized in that the first roller coupling portion 420 couples the first roller frame portion 410 and the guide body portion 100 in a spaced state so that the upper supporting roller portion 400 can move a predetermined distance in the left-right direction.

[0111] That is, Figure 6As shown, since the guide body 100 and the first roller frame 410 are spaced apart to form a predetermined width for the upper support roller 400 to move in the left-right direction, the upper support roller 400 can absorb the left-right movement or impact from the sliding cutlery basket.

[0112] To this end, the first roller coupling portion 420 is preferably formed such that the cross-sectional area of ​​the portion penetrating the first roller frame portion 410 is larger than the cross-sectional area of ​​the portion penetrating one side of the guide body portion 100 .

[0113] A feature of the present invention is that the upper support roller unit 400 according to an embodiment of the present invention further includes a bearing ball 430 .

[0114] One or more bearing balls 430 are arranged along the outer circumference of the first roller coupling part 420 in the space between the inner circumference of the first roller frame part 410 and the outer circumference of the first roller coupling part 420. At this time, the bearing balls 430 can absorb the movement or impact in the left and right directions of the sliding cutlery basket.

[0115] With the same purpose, the present invention is characterized in that the bearing ball 430 and the inner circumferential surface of the first roller frame portion 410 are spaced apart from each other so that the upper supporting roller portion 400 can move a predetermined distance in the left-right direction.

[0116] On the other hand, according to one embodiment, a track portion W on which the bearing ball 430 can be placed can be disposed on any one of the inner circumferential surface of the first roller frame portion 410 and the outer circumferential surface of the first roller coupling portion 420 .

[0117] When the bearing ball 430 is placed on the track portion W, the bearing ball 430 is in point contact with the inner circumference of the first roller frame portion 410 or the outer circumference of the first roller coupling portion 420 to stably perform the bearing function. Therefore, even without a separate retainer component, the operability of the upper support roller portion 400 can be improved, the number of components can be reduced, and the manufacturing cost can be saved.

[0118] In addition, since the track portion W is formed only on one of the inner circumferential surface of the first roller frame portion 410 and the outer circumferential surface of the first roller coupling portion 420 , it is possible to prevent the bearing ball 430 from being embedded in the track portion W and reducing the running performance.

[0119] Figure 7 (a) and (b) are respectively a cross-sectional view of a lower support roller portion and a perspective view of a second roller coupling portion according to an embodiment of the present invention.

[0120] like Figure 7 As shown, the lower supporting roller portion 500 according to an embodiment of the present invention may include a second roller frame portion 510 and a second roller coupling portion 520 .

[0121] The second roller frame portion 510 is a groove portion having a shape corresponding to the lower end guide portion 220 formed on the outer circumferential surface along the circumferential direction, and can rotate with the central axis as a reference and slide along the guide rail portion 200 .

[0122] On the other hand, the second roller frame portion 510 has an outer peripheral surface corresponding to the lower end guide portion 220 along the circumferential direction, and can rotate with the central axis as a reference, and further slide along the guide rail portion 200 .

[0123] The second roller coupling portion 520 is partially accommodated in the second roller frame portion 510, and passes through the central axis of the second roller frame portion 510 and one side of the guide body portion 100 to couple the second roller frame portion 510 and the guide body portion 100. In addition, the second roller coupling portion 520 serves as a rotation axis of the second roller frame portion 510.

[0124] At this time, the present invention is characterized in that the second roller coupling portion 520 couples the second roller frame portion 510 and the guide body portion 100 in a spaced state so that the lower support roller portion 500 can move a predetermined distance in the left-right direction.

[0125] That is, Figure 7 As shown, since the guide body 100 and the second roller frame 510 are spaced apart to form a predetermined width for the lower support roller 500 to move in the left-right direction, the lower support roller 500 can absorb left-right movement or impact from the sliding cutlery basket.

[0126] To this end, the second roller coupling portion 520 is preferably formed such that the cross-sectional area of ​​the portion penetrating the second roller frame portion 510 is larger than the cross-sectional area of ​​the portion penetrating one side of the guide body portion 100 .

[0127] A feature of the present invention is that the lower support roller unit 500 according to an embodiment of the present invention further includes a bearing ball 530 .

[0128] One or more bearing balls 530 are disposed along the outer circumference of the second roller coupling part 520 in the space between the inner circumference of the second roller frame part 510 and the outer circumference of the second roller coupling part 520. The bearing balls 530 can absorb the movement or impact of the sliding cutlery basket in the left and right directions.

[0129] With the same purpose, the present invention is characterized in that the bearing ball 530 of one embodiment of the present invention and the inner circumferential surface of the second roller frame portion 510 are spaced apart so that the lower support roller portion 500 can move a predetermined distance in the left-right direction.

[0130] On the other hand, according to one embodiment, a track portion W on which the bearing ball 530 can be placed can be disposed on any one of the inner circumferential surface of the second roller frame portion 510 and the outer circumferential surface of the second roller coupling portion 520 .

[0131] When the bearing ball 530 is installed on the track portion W, the bearing ball 530 can stably perform the bearing function by point contact with the inner circumference of the second roller frame portion 510 or the outer circumference of the second roller joint portion 520. Therefore, even without a separate retainer component, the operability of the lower support roller portion 500 can be improved, the number of components can be reduced, and the manufacturing cost can be saved.

[0132] In addition, since the track portion W is formed only on one of the inner circumferential surface of the second roller frame portion 510 and the outer circumferential surface of the second roller coupling portion 520, it is possible to prevent the bearing ball 530 from being embedded in the track portion W and reducing the running performance.

[0133] On the other hand, according to one embodiment, the structure of inserting the bearing balls 340, 430, 530 into the roller structures 300, 400, 500 is only applicable to at least one of the rack roller part 300, the upper support roller part 400, and the lower support roller part 500, and the roller structures can be applied to the ordinary structure of face-to-face friction. In this way, it is possible to prevent the user's convenience from being reduced due to the sliding action in the track device 1000 for dishwasher being too smooth and exceeding the sliding range desired by the user.

[0134] The above description of the present invention is for example only, and a person with ordinary knowledge in the technical field to which the present invention belongs may understand that it can be easily transformed into other specific forms without changing the technical ideas or essential features of the present invention. Therefore, the embodiments described above should be understood to be exemplary in all aspects, rather than restrictive. For example, each constituent element described in singular form may also be implemented in a dispersed manner, and similarly, constituent elements described as dispersed may also be implemented in a combined form.

[0135] The scope of the present invention should be interpreted as being reflected by the scope of the claims, and all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts are included in the scope of the present invention.

Claims

1. A track device for a dishwasher, include: Guide the main body; An upper support roller portion is coupled to one side of the guide body portion and is rotatable with respect to a central axis; A lower support roller portion is coupled to one side of the guide body portion and is rotatable with respect to a central axis; a guide rail portion extending along the sliding direction with one side of the guide rail portion inserted into a space between the upper support roller portion and the lower support roller portion; and A rack roller portion, one side of which is inserted into the interior of the guide rail portion, and the other side of which is coupled to a surface inside the dishwasher body or to the sliding cutlery basket; Wherein, the rack roller portion comprises: A rack roller body part is inserted into the guide rail part and can rotate with the central axis as a reference; A rack component is fixedly coupled to one side of the interior of the dishwasher body; and A rack coupling portion, which penetrates and couples the center of the rack roller body portion and one side of the rack member portion; The rack coupling portion couples the rack roller main body and the rack member in a spaced state so that the rack roller moves a predetermined distance in the left-right direction.

2. The track device for a dishwasher according to claim 1, It is characterized in that A bearing ball is provided inside at least one of the upper support roller portion, the lower support roller portion, and the rack roller portion.

3. The track device for a dishwasher according to claim 2, It is characterized in that One or more bearing balls are arranged in the space between the inner circumference of the rack roller body and the outer circumference of the rack coupling part. The bearing balls are spaced apart from the inner circumference of the rack roller body so that the rack roller moves a predetermined distance in the left-right direction.

4. The track device for a dishwasher according to claim 3, It is characterized in that A track portion on which the bearing ball is placed is arranged on either the inner peripheral surface of the rack roller body portion or the outer peripheral surface of the rack coupling portion.

5. A track device for a dishwasher, include: Guide the main body; An upper support roller portion is coupled to one side of the guide body portion and is rotatable with respect to a central axis; A lower support roller portion is coupled to one side of the guide body portion and is rotatable with respect to a central axis; a guide rail portion extending along the sliding direction with one side of the guide rail portion inserted into a space between the upper support roller portion and the lower support roller portion; and A rack roller portion, one side of which is inserted into the interior of the guide rail portion, and the other side of which is coupled to a surface inside the dishwasher body or to the sliding cutlery basket; Wherein, the rack roller portion comprises: A rack roller body part is inserted into the guide rail part and can rotate with the central axis as a reference; A rack component is fixedly coupled to one side of the interior of the dishwasher body; and A rack coupling portion, which penetrates and couples the center of the rack roller body portion and one side of the rack member portion; Wherein, the upper supporting roller portion comprises: a first roller frame portion that is rotatable about a central axis and is formed so that a peripheral surface corresponds to an upper end guide portion of the guide rail portion; and A first roller coupling portion, penetrating and coupling the center of the first roller frame portion and one side of the guide body portion; The first roller coupling portion couples the first roller frame portion and the guide body portion in a spaced state so that the upper supporting roller portion moves in a left-right direction by a predetermined distance.

6. The rail device for a dishwasher according to claim 5, It is characterized in that A bearing ball is provided inside at least one of the upper support roller portion, the lower support roller portion, and the rack roller portion.

7. The rail device for a dishwasher according to claim 6, It is characterized in that One or more bearing balls are arranged in a space between the inner circumference of the first roller frame and the outer circumference of the first roller coupling portion. The bearing balls are spaced apart from the inner circumference of the first roller frame so that the upper support roller portion moves a predetermined distance in the left-right direction.

8. The rail device for a dishwasher according to claim 7, It is characterized in that A track portion on which the bearing ball is placed is arranged on either the inner peripheral surface of the first roller frame portion or the outer peripheral surface of the first roller coupling portion.

9. A track device for a dishwasher, include: Guide the main body; An upper support roller portion is coupled to one side of the guide body portion and is rotatable with respect to a central axis; A lower support roller portion is coupled to one side of the guide body portion and is rotatable with respect to a central axis; a guide rail portion extending along the sliding direction with one side of the guide rail portion inserted into a space between the upper support roller portion and the lower support roller portion; and A rack roller portion, one side of which is inserted into the interior of the guide rail portion, and the other side of which is coupled to a surface inside the dishwasher body or to the sliding cutlery basket; Wherein, the rack roller portion comprises: A rack roller body part is inserted into the guide rail part and can rotate with the central axis as a reference; A rack component is fixedly coupled to one side of the interior of the dishwasher body; and A rack coupling portion, which penetrates and couples the center of the rack roller body portion and one side of the rack member portion; Wherein, the lower support roller portion comprises: a second roller frame portion that is rotatable about the central axis and is formed so that a peripheral surface corresponds to the lower end guide portion of the guide rail portion; and A second roller coupling portion, which penetrates and couples the center of the second roller frame portion and one side of the guide body portion; The second roller coupling portion couples the second roller frame portion and the guide body portion in a spaced state so that the lower support roller portion moves in the left-right direction by a predetermined distance.

10. The rail device for a dishwasher according to claim 9, It is characterized in that A bearing ball is provided inside at least one of the upper support roller portion, the lower support roller portion, and the rack roller portion.

11. The rail device for a dishwasher according to claim 10, It is characterized in that One or more bearing balls are arranged in the space between the inner circumference of the second roller frame and the outer circumference of the second roller coupling portion. The bearing balls are spaced apart from the inner circumference of the second roller frame so that the lower support roller moves a predetermined distance in the left-right direction.

12. The rail device for a dishwasher according to claim 11, It is characterized in that A track portion on which the bearing ball is placed is arranged on either the inner peripheral surface of the second roller frame portion or the outer peripheral surface of the second roller coupling portion.

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