CN219439029U - Shelf adjusting device of dish washing machine and dish washing machine - Google Patents

Abstract

The utility model discloses a shelf adjusting device of a dish washing machine and the dish washing machine, comprising: a support frame mounted on a rack of the dishwasher; the pulley frame is arranged on the supporting frame in an up-and-down adjustable way; a handle hinged to the support frame and defining the pulley frame; the handle and the support frame are provided with a hinge shaft and a torsion spring, the torsion spring is sleeved on the torsion spring shaft, and the torsion spring shaft and the hinge shaft are coaxially arranged. The pulley frame is arranged on the supporting frame and can be adjusted up and down, so that the pulley frame can be adjusted to different positions in the up-down direction, and further the up-down adjustment of the shelf is realized; the shelf adjusting device has simple structure and is beneficial to reducing the manufacturing cost. The limitation or the release of the limitation on the pulley frame is realized by adjusting the handle, so that the adjustment operation of the pulley frame is simple, the operation adjustment on the pulley frame in the up-down direction can be conveniently realized, and the adjustment efficiency is improved.

Description

Shelf adjusting device of dish washing machine and dish washing machine

Technical Field

The utility model belongs to the technical field of dish washers, and particularly relates to a shelf adjusting device of a dish washer and the dish washer with the shelf adjusting device.

Background

A dishwasher is a kitchen appliance for automatically washing dishes, and is gradually entering into more and more general households. The dishwasher has a chamber for washing dishes therein, with a rack for placing dishes therein. In operation, the dishwasher is cleaned by spraying high pressure wash water onto the dishes in the dishwasher chamber. To facilitate pulling the rack out of the chamber for picking and placing cutlery, rails are provided on opposite side walls within the chamber, along which the rack can slide.

To meet the need for being able to adjust the height of the rack according to the size of the cutlery, the existing racks are generally height-adjustable. At present, the height adjusting mechanisms of the shelf mainly comprise two types, the first type is to add a mechanical mechanism capable of adjusting the height of the shelf on the shelf, and the height of the shelf is adjusted by adjusting a mechanical handle. However, when the mode is adopted, a special mechanical mechanism capable of adjusting the height of the shelf is additionally arranged on the shelf, so that the cost is high, and popularization and application are not facilitated. The second is to install at least two rows of pulleys arranged up and down on the rack, and the first row of pulleys or the second row of pulleys are matched with the guide rail according to the requirement; because the space of the dish washer chamber and the shelf is limited, only two rows of pulleys can be arranged, and therefore, only two kinds of height adjustment can be realized, and the pulley span is large, and the adjustment precision is low.

In patent CN 201820767584.9, a rack adjusting assembly and a dish washer are disclosed, the rack adjusting assembly is arranged between the side surface of a rack and the inner wall of a household appliance with an inner cavity, and comprises a fixing part connected with the rack, a mounting part connected with the inner wall and a plunger for movably connecting the fixing part with the mounting part, wherein one of the fixing part and the mounting part is provided with at least two gear parts and an adjusting groove for connecting each gear part, and the plunger extends from the other and is inserted into the gear parts and can be converted between the gear parts through the adjusting groove so as to adjust the height of the rack. When the gear position is located on the fixed part, the shelf is moved so that the fixed part fixedly connected with the shelf moves, and at the moment, the inserting column is converted between the gear position parts through the adjusting groove.

The adjusting structure in the patent is complex, and the adjusting operation steps are also complicated, which is unfavorable for the rapid adjustment of the shelf.

The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides a shelf adjusting device of a dish washer, which has simple structure and simple adjustment operation and is beneficial to improving the adjustment efficiency.

In order to achieve the aim of the utility model, the utility model is realized by adopting the following technical scheme:

a rack adjusting device of a dish washer, comprising:

a support frame mounted on a rack of the dishwasher;

the pulley frame is arranged on the supporting frame in an up-and-down adjustable way;

a handle hinged to the support frame and defining the pulley frame;

the handle and the support frame are provided with a hinge shaft and a torsion spring, the torsion spring is sleeved on the torsion spring shaft, and the torsion spring shaft and the hinge shaft are coaxially arranged.

In some embodiments of the present application, the torsion spring shaft is mounted on the handle, and a defining hole for mounting the torsion spring shaft and defining rotation of the torsion spring shaft is formed in the handle.

In some embodiments of the present application, the handle is provided with an avoidance opening, and the torsion spring is provided with a torsion spring main body extending into the avoidance opening, a first torsion edge extending from one end of the torsion spring main body and propping against the handle, and a second torsion edge extending from the other end of the torsion spring main body and propping against the support frame.

In some embodiments of the present application, the defined aperture is square and the torsion spring shaft is circular.

In some embodiments of the present application, a hinge shaft extending is provided on the handle, a hinge hole matching with the hinge shaft is provided on the support frame, the hinge shaft is of a hollow structure, and the torsion spring shaft is located in the hinge shaft.

In some embodiments of the present application, a plurality of ribs are provided on the outer side of the hinge shaft, a plurality of ribs are provided at intervals in the circumferential direction, and the ribs are provided to extend in the axial direction.

In some embodiments of the present application, the support frame is provided with an inward convex groove, the handle is hinged in the convex groove, a front hinge plate and a rear hinge plate are arranged on the upper portion of the convex groove, and the hinge plate is provided with the hinge hole.

In some embodiments of the present application, the side surface of the shelf is provided with a plurality of struts extending in the up-down direction, and the inner side of the supporting frame is provided with a clamping groove which is clamped with the struts.

In some embodiments of the present application, a cross bar extending in the front-rear direction is provided on a side surface of the shelf, a hanging ear is provided on an upper end of the supporting frame, and an ear groove for accommodating the cross bar is provided on an outer side of the hanging ear.

In some embodiments of the present application, the lugs are formed by extending upward along the hinge plate, the operating portion of the handle is located between two lugs, and a limiting protrusion is disposed on a side of the two lugs, which is close to each other, and is close to the protrusion.

Based on the shelf adjusting device of the dish washing machine, the utility model also provides the dish washing machine with the shelf adjusting device, which has simple structure and simple adjustment operation, and is beneficial to improving the adjustment efficiency.

A dish washer is provided with a shelf, and the shelf adjusting device is arranged on the shelf.

Compared with the prior art, the utility model has the advantages and positive effects that: the pulley frame is arranged on the supporting frame and can be adjusted up and down, so that the pulley frame can be adjusted to different positions in the up-down direction, and further the up-down adjustment of the shelf is realized; the shelf adjusting device has simple structure and is beneficial to reducing the manufacturing cost. The limitation or the release of the limitation on the pulley frame is realized by adjusting the handle, so that the adjustment operation of the pulley frame is simple, the operation adjustment on the pulley frame in the up-down direction can be conveniently realized, and the adjustment efficiency is improved; by arranging the torsion spring, the handle is tightly attached to the direction of the shelf, and the limitation of the handle to the pulley frame is ensured; the torsion spring shaft is arranged, and when the handle rotates, the torsion spring rotates around the torsion spring shaft, so that the stability of the torsion spring in the axial direction is ensured.

Other features and advantages of the present utility model will become apparent upon review of the detailed description of the utility model in conjunction with the drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a pulley frame in a first position of one embodiment of a rack adjustment device for a dishwasher in accordance with the present utility model;

FIG. 2 is an enlarged schematic view of the area A in FIG. 1;

FIG. 3 is an enlarged schematic view of the area B in FIG. 1;

FIG. 4 is a schematic cross-sectional view of the structure of FIG. 1;

FIG. 5 is an enlarged schematic view of the area C in FIG. 4;

FIG. 6 is an enlarged schematic view of the area D in FIG. 5;

FIG. 7 is a schematic view of the pulley frame of FIG. 1 shown in a second position;

FIG. 8 is an enlarged schematic view of the area E in FIG. 7;

FIG. 9 is a schematic cross-sectional view of FIG. 7;

FIG. 10 is an enlarged schematic view of area F in FIG. 9;

FIG. 11 is a schematic view of the shelf adjustment device in an unassembled configuration;

FIG. 12 is a schematic view of the structure of the support bracket and handle of FIG. 11;

FIG. 13 is a schematic view of the structure of FIG. 12 in another direction;

FIG. 14 is an enlarged schematic view of the area G of FIG. 13;

FIG. 15 is a schematic view of a support frame;

FIG. 16 is a schematic view of the structure of the handle;

FIG. 17 is an enlarged schematic view of the area H of FIG. 16;

FIG. 18 is a schematic view of the structure of the pulley frame;

wherein the shelf adjustment device 100;

a support frame 10; an upper defining edge 11; a convex groove 12; a hinge plate 121; a hinge hole 122; a lower extension claw 13; a hanger 14; ear slots 141; defining a projection 142; an engagement groove 15;

a pulley frame 20; a cavity 21; defining a protrusion 211; a first chute 22; a lower notch 23; a second chute 24;

a handle 30; a hinge 31; defining a body 32; defining a slot 321; a lower rim 322; defining a slot 323; an operation unit 33; a hinge shaft 34; a rib 341; a torsion spring 35; a torsion spring main body 351; a first torsion edge 352; a second torsion edge 353; a torsion spring shaft 36; an avoidance port 37; defining a bore 38;

a fixing frame 40;

a shelf 200; a strut 210; a cross bar 220.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that, the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the positional relationships shown in the drawings, so that the direction approaching the center of the shelf is "inside", and vice versa; the direction of the shelf, which is close to the user, is the front direction, and the reverse direction is the back direction when the shelf is in a normal use state. The terminology is used for the purpose of describing and simplifying the description only, and is not intended to indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Example 1

Referring to fig. 1 to 18, in one embodiment of a rack adjusting apparatus of a dishwasher according to the present utility model, a rack adjusting apparatus 100 of a dishwasher is mounted on a rack 200, the rack adjusting apparatus 100 comprising: the dish washer comprises a support frame 10, a pulley yoke 20 and a handle 30, wherein the support frame 10 is arranged on a shelf 200 of the dish washer, and the pulley yoke 20 is arranged on the support frame 10 in an up-and-down adjustable manner. The handle 30 is hinged on the support frame 10, the handle 30 can be used for limiting the pulley frame 20 on the support frame 10, and the limiting of the pulley frame 20 can be released through the hinged movement of the handle 30, so that the pulley frame 20 can continue to move in an up-down direction.

In this embodiment, the pulley frame 20 is arranged on the supporting frame 10 and can be adjusted up and down, so that the pulley frame 20 can be adjusted to different positions in the up and down direction, and further the up and down adjustment of the shelf 200 can be realized; so that the shelf adjusting device 100 has a simple structure, which is advantageous in reducing manufacturing costs. The limitation or the release of the limitation on the pulley frame 20 is realized by adjusting the handle 30, so that the adjustment operation of the pulley frame 20 is simple, the operation adjustment on the pulley frame 20 in the up-down direction can be conveniently realized, and the adjustment efficiency is improved.

In some embodiments of the present application, a hinge shaft 34 and a torsion spring 35 are disposed between the handle 30 and the support frame 10, the torsion spring 35 is sleeved on a torsion spring shaft 36, the torsion spring shaft 36 is mounted on the handle 30, and the torsion spring shaft 36 and the hinge shaft 34 are coaxially disposed. The handle 30 is hinged on the support frame 10, so that a hinge shaft 34 is required; the torsion spring 35 is provided to enable the handle 30 to be tightly attached to the shelf 200, so as to ensure the limitation of the limiting groove 321 to the pulley frame 20; the torsion spring shaft 36 is arranged, and when the handle 30 rotates, the torsion spring 35 rotates around the torsion spring shaft 36, so that the stability of the torsion spring 35 in the axial direction is ensured.

In some embodiments of the present application, the pulley frame 20 has a first position at the lower portion of the support frame 10 and a second position at the upper portion of the support frame 10, fig. 1 is a pulley frame 20 having a first position at the lower portion of the support frame 10, and fig. 1 is a pulley frame 20 having a second position at the upper portion of the support frame 10. After the rack 200 is mounted to the dishwasher, the wheels on the pulley frame 20 are removably mounted to the rails of the rack 200, i.e., the weight of the rack 200 and the dishes within the rack 200 are pressed against the rails by the pulley frame 20, i.e., the pulley frame 20 functions to support the support frame 10 and the rack 200. When the pulley frame 20 is in the second position, the upper limiting edge 11 is provided at the upper end of the supporting frame 10 for preventing the pulley frame 20 from continuing to move upward, so that the pulley frame 20 is limited to the second position. When the pulley yoke 20 moves down on the support frame 10 to the first position, the pulley yoke 10 is then restrained by the handle 30 in the first position so as to be caught on the support frame 10, and the handle 30 can bear the upward force transmitted by the pulley yoke 10.

In some embodiments of the present application, the pulley frame 20 is slidably mounted on the outer side of the supporting frame 10, and an upper limiting edge 11 extending outwards is provided at the upper end of the supporting frame 10, and the upper limiting edge 11 is matched with the upper end of the pulley frame 20, so as to limit the pulley frame 20 to the second position. A first limiting structure is provided between the handle 30 and the pulley yoke 20 for limiting the pulley yoke 20 to a first position. The first limiting structure has a limiting groove 321 provided at the lower end of the handle 30, and the upper end of the pulley frame 20 may be positioned in the limiting groove 321; so that the pulley frame 20 is restrained within the defining groove 321.

In some embodiments of the present application, the shelf adjustment device 100 further includes a fixing frame 40 mounted on the shelf 200, the fixing frame 40 and the supporting frame 10 are spaced apart, the pulley frame 20 is mounted on the fixing frame 40 and the supporting frame 10 at the same time, and the pulley frame 20 is slidably located on the fixing frame 40 up and down.

In some embodiments of the present application, referring to fig. 5 to 6, the handle has a hinge portion 31, a defining body 32 extending downward along the hinge portion 31, and an operating portion 33 extending upward along the hinge portion 31, the pulley frame 20 has a cavity 21 extending inward, the cavity 21 is disposed through in an up-down direction, and the defining body 32 is located in the cavity 21; as the pulley frame 20 moves up and down within the support frame 10, the defining body 32 moves up and down within the cavity 21 relative to the cavity 21. The direction near the center of the shelf 200 is inner and vice versa.

In some embodiments of the present application, a limiting groove 321 is provided at the lower end of the limiting body 32. A lower rim 322 is provided outside the lower end of the limiting body 32, and a limiting groove 321 is formed between the lower rim 322 and the lower end of the limiting body 32; the upper end of the cavity wall of the cavity 21 is positioned in the limiting groove 321, the cavity wall of the cavity 21 is the cavity wall positioned on the inner side of the cavity 21, the cavity 21 is formed by surrounding four cavity walls, and the cavity 21 is provided with the cavity wall, the outer cavity wall, the front cavity wall and the rear cavity wall; so that the upper end of the inner cavity wall of the cavity 21 abuts in the defining groove 321, so that the defining groove 321 serves to withstand the upward force imparted by the pulley frame 20.

In some embodiments of the present application, referring to fig. 6 and 12, an inward protruding limiting protrusion 211 is provided on an outer wall of the cavity 21, and a limiting groove 323 in an up-down direction is provided on the limiting body 32, and the limiting groove 323 is disposed in a matching manner with the limiting protrusion 323. During the up-and-down movement of the pulley frame 20, the restricting protrusion 323 moves in the restricting groove 323, avoiding the shake of the pulley frame 20 in the front-and-rear direction; while also avoiding sloshing of the confining body 32 in the front-rear direction.

In some embodiments of the present application, the support frame 10 is provided with an inwardly extending convex groove 12, the cavity 21 is slidably located in the convex groove 12 up and down, and the handle 30 is hinged at the convex groove 12. By providing the convex groove 12, the restricting body 32 is positioned in the convex groove 12, so that the front and rear side walls of the convex groove 12 can restrict the shake of the restricting body 32 in the left-right direction; the front and rear side walls of the groove 12 are also beneficial to realizing the hinging of the handle 30 and the support frame 10.

In some embodiments of the present application, referring to fig. 18, in order to limit that the pulley frame 20 can only move in the up-down direction on the supporting frame 10, a first sliding groove 22 is provided on the pulley frame 20, and front and rear end edges of the supporting frame 10 are located in the first sliding groove 22; by providing the left and right first slide grooves 22, the pulley frame 20 can move only in the up-down direction, which matches with the front and rear end edges of the support frame 10.

In some embodiments of the present application, after the pulley carriage 20 has moved upwardly against the upper rim 11, it is no longer possible to continue the upward movement, and the pulley carriage 20 reaches the uppermost position, i.e. the second position. In order to prevent the pulley 20 from falling out of the lower end of the supporting frame 10 when the pulley frame 20 moves downwards, a lower extending claw 13 extending outwards is arranged at the lower end of the supporting frame 10, and a lower notch 23 matched with the lower extending claw 13 is arranged at the lower end of the pulley frame 20; after the pulley frame 20 moves downward until the lower extension claw 13 enters the lower notch 23 and abuts against each other, the pulley frame 20 cannot continue to move downward. After releasing the pulley frame 20, the pulley frame 20 is abutted upward against the defining groove 323 of the handle 30 so that the pulley frame 20 is supported in the first position.

In some embodiments of the present application, referring to fig. 12-17, an avoidance opening 37 is formed on the handle 30, the torsion spring 35 has a torsion spring main body 351 extending into the avoidance opening 37, a first torsion edge 352 extending along one end of the torsion spring main body 351, and a second torsion edge 353 extending along the other end of the torsion spring main body 351, where the first torsion edge 352 abuts against the handle 30, and the second torsion edge 353 abuts against the support frame 10. The torsion spring main body 351 is sleeved on the torsion spring shaft 36, so that the axial stability of the torsion spring main body 351 is ensured; by arranging the avoiding opening 37, the torsion spring main body 351 extends in and is used for limiting two ends of the torsion spring main body 351; in this embodiment, the torsion spring shaft 36 is not located in the relief port 37.

In some embodiments of the present application, a defining aperture 38 is provided in the hinge portion 31 of the handle 30, the defining aperture 38 being for mounting the torsion spring shaft 36 and being operable to define rotation of the torsion spring shaft 36. The torsion spring shaft 36 is fixedly arranged in the limiting hole 38, a section of the limiting hole 38 is square, the torsion spring shaft 36 is round, and the torsion spring shaft 36 cannot rotate in the limiting hole 38. Two opposed coaxially disposed limiting holes 38 are provided in the handle 31 for receiving the opposite ends of the torsion spring axle 36.

In some embodiments of the present application, the handle 30 is provided with an extending hinge shaft 34, the support frame 10 is provided with a hinge hole 122 matched with the hinge shaft 34, the hinge shaft 34 is of a hollow structure, the limiting hole 38 extends into the hinge shaft 34, and the torsion spring shaft 36 is located in the hinge shaft 34. The hinge hole 38 in the hinge shaft 34 is circular, so that the torsion spring shaft 36 can be conveniently installed; while facilitating the coaxial arrangement of torsion spring shaft 36 and hinge shaft 34. A plurality of ribs 341 are circumferentially spaced apart from the outside of the hinge shaft 34, and the ribs 341 are axially extended.

In some embodiments of the present application, an inward convex groove 12 is provided on the support frame 10, a handle 30 is hinged in the convex groove 12, a front hinge plate and a rear hinge plate 121 are provided on the upper portion of the convex groove 12, and a hinge hole 122 is formed on the hinge plate 121. By providing two hinge plates 121, articulation of the handle 30 is achieved.

In some embodiments of the present application, a plurality of struts 210 extending in the up-down direction are provided on the side surface of the shelf 200, and an engagement groove 15 engaged with the struts 210 is provided on the inner side of the support frame 10; after the engagement groove 15 is engaged with the strut 210, the movement of the support frame 10 in the up-down direction is not limited. The shelf 200 is provided with a transverse rod 210 extending transversely, the upper end of the support frame 10 is provided with a hanging lug 14, and the outer side of the hanging lug 14 is provided with an ear groove 141 for accommodating the transverse rod 210. The support frame 10 is detachably fixed to the shelf 200 by providing the lug grooves 141 and the cross bars 210 for limiting the movement of the support frame 10 in the up-down direction.

In some embodiments of the present application, the lugs 14 are formed to extend upward along the hinge plate 121, and the operating portion 33 of the handle 30 is located between the two lugs 14, and the limiting protrusion 142 protruding toward each other is provided on a side where the two lugs 14 are located toward each other. By providing the restricting projection 142 for restricting the movable range of the operation portion 33 in the front-rear direction, shake of the operation portion 33 in the front-rear direction is avoided.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. A rack adjusting device of a dish washer, comprising:

a support frame mounted on a rack of the dishwasher;

the pulley frame is arranged on the supporting frame in an up-and-down adjustable way;

a handle hinged to the support frame and defining the pulley frame;

the handle and the support frame are provided with a hinge shaft and a torsion spring, the torsion spring is sleeved on the torsion spring shaft, and the torsion spring shaft and the hinge shaft are coaxially arranged.

2. The shelf adjustment device of claim 1, wherein the torsion spring shaft is mounted on the handle, and a defining aperture is provided in the handle for mounting the torsion spring shaft and for defining rotation of the torsion spring shaft.

3. The shelf adjustment device of claim 1, wherein the handle is provided with a relief opening, and the torsion spring has a torsion spring body extending into the relief opening, a first torsion edge extending along one end of the torsion spring body and abutting against the handle, and a second torsion edge extending along the other end of the torsion spring body and abutting against the support frame.

4. A shelf adjustment apparatus according to any one of claims 1 to 3, wherein a hinge shaft is provided on the handle in an extended arrangement, a hinge hole is provided on the support frame in a matched arrangement with the hinge shaft, the hinge shaft is of a hollow structure, and the torsion spring shaft is located in the hinge shaft.

5. The shelf adjustment device of claim 4, wherein a plurality of ribs are provided on the outside of the hinge shaft, the plurality of ribs being circumferentially spaced apart, the ribs extending in an axial direction.

6. The shelf adjustment apparatus of claim 4 wherein said support bracket is provided with an inwardly directed slot, said handle being hingedly mounted within said slot, a front hinge plate and a rear hinge plate being provided at an upper portion of said slot, said hinge plate being provided with said hinge hole.

7. The shelf adjustment device according to claim 6, wherein the shelf has a plurality of support rods extending in the vertical direction on the side surface thereof, and the support frame has engagement grooves provided on the inner side thereof for engaging with the support rods.

8. The shelf adjusting device according to claim 7, wherein a cross bar extending in the front-rear direction is provided on a side surface of the shelf, a hanging lug is provided at an upper end of the supporting frame, and an ear groove for accommodating the cross bar is provided outside the hanging lug.

9. The shelf adjustment apparatus as defined in claim 8, wherein the tab is formed extending upward along the hinge plate, the operating portion of the handle being located between the two tabs, and a limiting projection is provided on a side of the two tabs adjacent to each other.

10. A dishwasher, characterized by a rack on which the rack adjustment device of any one of claims 1 to 9 is mounted.