EP2010844A2

EP2010844A2 - Telescopic slide for a refrigeration device

Info

Publication number: EP2010844A2
Application number: EP07727666A
Authority: EP
Inventors: Karl-Friedrich Laible
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2006-04-20
Filing date: 2007-04-02
Publication date: 2009-01-07
Also published as: WO2007122076A3; DE102006018425A1; WO2007122076A2; RU2419752C2; RU2008144784A; US20090071186A1

Abstract

The invention relates to a telescopic slide for a refrigeration device, comprising at least two rails (14, 15) that can be displaced towards each other in the longitudinal direction while being guided one on the other. A support (11) having a tolerance is mounted on the first rail (14). The contact surfaces between the support (11) and the first rail (14) have a large coefficient of friction in order to prevent the support (11) from sliding to and fro on the rail (14).

Description

Telescopic extension for a refrigeration device

The invention relates to a telescopic extension for a refrigeration device according to the preamble of claim 1 and claim 8.

Rails of such a telescopic extension, with which the refrigerated goods are moved out of the refrigerator, should be smooth, so that the carrier, even if it is heavily loaded, can be pulled out of the refrigerator with little effort. In general, pull-outs of this type have stops that limit the freedom of movement of the rails with respect to each other, so that the rails are not accidentally pulled apart completely. Such attacks are exposed to heavy loads in heavy loads during operation and inadvertent use may result in damage to the carrier or attacks.

In order to prevent this, it has already been proposed in DE 10 2005 021 589.0 to resiliently fasten the carrier to the rail in the direction of movement of the rails. As a result, the carriers have a certain amount of play with respect to the rails.

Furthermore, the internal widths of refrigerators are subject to large tolerances due to the foamed housing and the different expansions of the materials due to the large temperature loads. To compensate for these tolerances, the carriers are mounted with a lateral play, so a game perpendicular to the direction of movement of the rails on the rails. As a result of this use, damage to the refrigerated goods carriers as a result of use can be substantially prevented by this loose acceptance of the refrigerated goods carriers on the extension. Due to the game between carrier and extract, however, it comes to the fact that the refrigerated goods wiggle sideways when moving back and forth. This leads to a reduction in touchable quality and thus to a depreciation of the refrigerator.

The invention has the object of providing a telescopic extension for a refrigerator in such a way that the refrigerated goods are smoothly moved to avoid damage to the refrigerated goods during normal use, the necessary large tolerances of refrigerators is taken into account and at the same time the impression of a high-quality system preserved. The object is achieved according to the invention by a telescopic extension for a refrigeration device with the features of claim 1 and claim 8.

According to the invention contact surfaces between the carriers and the rails are designed so that large frictional forces prevail between them. Such friction surfaces prevent wobbling of the shells and thus also a possible tilting of the refrigerated goods, which is due to the conditional by the large tolerances game of refrigerated goods compared to the rails in the previous structure. As a result, the lateral displacement of the refrigerated goods in normal use can be completely prevented, whereby the tangible quality is significantly improved.

Another advantage is that the friction surfaces have a damping effect, which leads to quieter movement noise when pulling out the refrigerated goods. As a result, a rattle of cheap refrigerated goods carriers made of plastic on the extracts can be prevented, which also causes a higher quality impression, although more favorable materials are used.

Under large friction forces friction forces are to be understood according to the invention, which are greater than forces that arise when moving the carrier, so that also z. B. in jerky movements of the wearer, a relative movement at the contact surfaces between the carriers and the rails is at least largely avoided.

Preferably, the coefficient of static friction of the frictional contact surfaces is between 0.3 and 1. This makes it possible to prevent a lateral wobbling of the refrigerated goods carriers without at the same time restricting too much the mobility of the trays in the direction of movement. Ideally, the value for the coefficient of friction is 0.7.

In a preferred embodiment of the invention, the rail to which the carrier is attached is provided with a surface which causes high adhesion. The fact that the friction surface is effected via a surface treatment of the rail, the previous proven structure and the materials used previously can be maintained, it is only a surface treatment of the rail necessary. In this case, the rail could be provided with a slip-resistant coating. The surface of the rail could also be provided with a structure that causes greater friction. This solution is especially advantageous if the refrigerated goods carrier rests directly on the rail of the telescopic extension.

In a further advantageous embodiment, a carrier receptacle, which serves to secure the carrier to the first rail with a tolerance, at least in the contact area with the carrier made of a material with high coefficients of friction, such as soft thermoplastic elastomer at least partially produced or with a support of such material Mistake. As a result, the design of rail and carrier can be maintained, only in the selection of materials for the carrier support must be paid to a high coefficient of friction. So this represents a particularly advantageous solution that requires little structural changes to the previous structure and is easy to ensure. If only the bearing surface of the support receptacle made of a soft thermoplastic elastomer, so it is advantageous to produce the support receptacle itself, for example, polyoxymethylene or other high-quality plastic. As a result, the stability of the carrier mount and the high sliding resistance of the contact surface with the carrier can be ensured at the same time.

In a further advantageous embodiment of the invention, the friction surface is realized on the carrier itself. In the region of the carrier in which the contact with the rail or a carrier mount attached thereto is produced, the carrier is provided for this purpose with a material with a high coefficient of friction, such as, for example, a soft thermoplastic elastomer. This can prevent that changes to the relatively complex rail system of the telescopic extension must be made. The material with a high friction effect is attached to the refrigerated goods itself, which may be a cheaper solution under certain circumstances.

Further details and advantages of the invention will become apparent from the dependent claims in conjunction with the description of an embodiment which is explained in detail with reference to the drawings.

Show it:

1 shows a perspective view of a refrigeration device on which the present invention is realized, FIG. 2 shows a perspective view of two refrigerated goods carriers of the refrigerating device from FIG. 1, Figure 3: a perspective view of a left telescopic extension of the lower

refrigerated goods,

Figure 4: the telescopic extension of Figure 3 with mounted thereon carrier part and Figure 5: a section of the telescopic extension with an inventive

Friction surface.

Figure 1 shows a perspective view of a refrigerator with a body 1 and a door 2. In a refrigerator 3 inside the device are two refrigerated goods 4 and 5 in the form of pull-out boxes exemplified. The pull-out boxes 4 and 5 are slidably mounted on not visible in this representation, suspended on the side walls of the body 1 telescopic extensions.

Figure 2 shows the two pull-out boxes 4 and 5 in a perspective view from its rear side. The pull-out boxes 4 and 5 each comprise a basket formed of perforated sheet metal, the front side of which facing the door being faced with a plastic shield 7. The side walls of the baskets each have vertical upper and lower wall portions 8 and 9 and between these inclined shoulders 10, which run towards each other towards the bottom. At the shoulders 10 each one injection-molded plastic or formed of metal support member 11 is fixed, which can be seen in Figure 4 in more detail. The support members 1 1 in turn are supported via adapters 19, 20 on telescopic extensions 12 and 13, wherein the adapters 19, 20 together with the support parts 1 1 create the prerequisite that different width telescopic extensions, namely partial and full extension of differently shaped refrigerated goods can be mounted.

The telescopic extensions 13 on which the lower drawer 5 is supported, each having a pair of interlocking rails. The freedom of movement of these rails against each other is between 50 and 80% of their length; Here it is equal to the depth of the overlying pull-out box 4, so that the pullout box 5 is pulled out in its fully extended position to the stop completely under the overlying box 4 and accessible on its entire top 2.

FIG. 3 shows a perspective view of one of the telescopic extensions 13 of the lower pull-out box 5, specifically of the left-hand pull-out 13, from the perspective of an observer looking into the cooling space 3. The extract includes two rails bent from sheet steel; an outer rail 14 of approximately C-shaped cross section and one in the Cavity of the outer rail 14 engaging inner rail 15. Opposite legs of the rails 14 and 15 define two cylindrical channels 16 in each of which a plurality of not visible in this representation balls are taken, the rails 14 and 15 play and easily against each other movable. A bolt 17 projects from the front end of the outer rail 14 into the space between the rails 14 and 15. Its contact with a rubber buffer 18, which has just been identified in the figure and which is attached to the inner rail 15, defines a limit to the freedom of movement of the rails 14 and 15 relative to one another.

A front adapter 19 and a rear plastic adapter 20 are attached to the outer rail 14. The adapters 19 and 20 each have an approximately prism-shaped base body 21 to which a horizontal web 22 resting on the upper leg of the rail 14 is integrally formed on its upper side. From the top of the main body 21 is respectively a locking element 23 and 24 from.

FIG. 4 again shows a perspective view of the telescopic extension 13 from FIG. 3, this time with carrier part 11 latched thereto. The carrier part 11 comprises an elongated base plate 34 which is supported on the upper sides of the adapters 19 and 20. At a front end of the base plate 34 designed as a rectangular opening receptacle 35 is formed, through which the locking element 23 of the adapter 19 is inserted therethrough. The pin 24 of the rear adapter 20 engages in a rearwardly open slot 36 of the base plate 34 a. At both ends of the base plate 34, above the hole 35, and the slots 36 is formed in each case an abutment for fastening the basket of the pull-out box. The abutment comprises in each case an inclined plate 37, which is connected at its lower edge with a basket-facing edge of the base plate 34 and which combines at its upper edge with two emanating from the base plate 34 vertical struts 38 to a U-profile section 39. In the middle of the plate 37 is a shallow recess 40 and in the middle of which in turn a bore 41 is formed, which are flared toward the back of the plate 37 to a hexagonal cross-section.

Whenever the rail 14 or 15 abuts against a Wegbegrenzungsanschlag and thus the drawer 4 and thus the support 1 1 is braked abruptly, the base plate 34 exerts on one of the elastic leg 25 of the locking element 23, a force from this in the direction of the opposite Schenkel's 25 drives. The drawer 4 can therefore slip on the rail 14 in the direction of movement until a contact of the Leg 25 prevents further deformation. The inertial forces that occur when the rail 14 abuts a stop and the drawer 4 is braked abruptly, are therefore much smaller than a rigid connection between drawer and rail, so that a lighter, thin-walled and the correspondingly inexpensive adapter 19 is sufficient to to ensure a secure anchoring of the pull-out box 4 on the telescopic extension 13.

As can be seen on the hole 35 and the slots 36 in Figure 4, both the pin 24 and the locking element 23 of the adapter 19 and 20 perpendicular to the direction of movement of the rail 14 a game against the base plate 34 of the carrier, which a large lateral tolerance of the carrier 11 relative to the telescopic extension 13 allows. As a result, production-related slightly different internal widths of refrigerators to which the telescopic extensions 13 are attached, as well as different dimensions of the attached materials taken into account. Thus, the carrier can be moved back and forth with respect to the rail 14 within the play visualized by means of the slots 36 in the adapter 20. This results in that when moving the carrier on the rail 14, a wobbling of the box 4 or 5 is caused.

In order to prevent this or to limit it as best as possible, areas 51 and 52 are provided on the contact surfaces 50 of the adapters 19 and 20 with the carrier part 11 with a soft thermoplastic elastomer, as shown by the detail in FIG Example of the adapter 20 is shown as representative. Such friction surfaces 51 and 52 may be arranged at any contact with the support member 11 surface of the adapter 19 and 20, but it is also possible to equip the adapters 19 and 20 generally with such a surface with a high coefficient of friction.

LIST OF REFERENCE NUMBERS

1 corpus

2 door

3 refrigerator

4 refrigerated goods carriers / pull-out box above

5 refrigerated goods carriers / pull-out box below

7 plastic shield

8 wall section

9 wall section

10 shoulders

11 carrier parts

12 telescopic extension

13 telescopic extension left

14 rail outside

15 track inside

16 cylindrical channels

17 bolts

18 rubber buffers

19 adapters

20 adapters

21 prism-shaped base body

22 footbridge

23 locking element

24 locking element

34 base plate

35 recording executed as a rectangular breakthrough

36 slot open at the back

37 oblique plate

38 vertical struts

39 U-profile section

40 shallow depression

41 bore

51 friction surfaces

52 friction surfaces

Claims

claims

1 . Telescopic extension for a refrigeration device having at least two rails (14, 15) movably connected to one another in their longitudinal direction and a support (11) attached to a first of the rails (14), the support (11) being attached to the first of the rails (11). 14) is fastened with tolerance, characterized in that contact surfaces between the carrier (1 1) and the first rail (14) have a large coefficient of friction.

2. telescopic extension for a refrigerator according to claim 1, characterized in that contact surfaces between the carrier (1 1) and rail (14) have a coefficient of friction of at least 0.3

3. telescopic extension for a refrigerator according to claim 2, characterized in that contact surfaces between the carrier (1 1) and rail (14) have a coefficient of friction of 0.7.

4. Telescopic extension for a refrigeration device according to claim 1, characterized in that the first rail (14) or a carrier mount (19, 20) attached thereto has a friction surface (51, 52).

5. Telescopic extension for a refrigeration device according to claim 4, characterized in that the first rail (14) has a sliding-inhibiting surface.

6. Telescopic extension for a refrigeration device according to claim 4, characterized in that the carrier receptacle (19, 20) has a material with a high coefficient of friction.

7. telescopic extension for a refrigeration device according to claim 1, characterized in that the contact region of the carrier (1 1) to the rail (14) or a carrier support (19, 20) attached thereto comprises a material having a high coefficient of friction.

8. Refrigerating appliance with a retractable by means of a telescopic extension in the refrigerated space refrigerated goods, wherein the telescopic extension (12, 13) at least two mutually in their longitudinal direction to each other movably guided rails (14, 15) and a on a first of the rails (14) with tolerance fixed carrier (11), characterized in that contact surfaces (51, 52) between the carrier (11) and the first rail (14) have a large coefficient of friction.