JPH0246343B2 - SHINSHUKUJIZAIKABAA - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a telescoping cover (hereinafter abbreviated as "telescopic cover") consisting of a plurality of fitted boxes.
It is related to.

[Summary of the invention]

The present invention provides a telescoping cover consisting of a plurality of inlaid boxes, with at least three
three guide elements, at least one of which extends by a certain dimension beyond the length of the corresponding box upon extension of the two boxes; By being removable from the corresponding box, small compressed dimensions of the telescopic cover are obtained even with very wide boxes, and at the same time a self-supporting structure is easily obtained which saves material.

[Prior art and its problems]

A telescoping cover of the type in which the box is slidably guided in the longitudinal direction by a guide device as described in the preamble of claim 1 is used for machine tools and similar equipment. An important user requirement in this respect is that the compressed dimensions of the telescoping cover be as small as possible. This is because for a given overall length of the machine, the usable working stroke of the machine can be reduced to the compressed dimension (i.e. the length of the telescoping cover in the compressed state).

However, it has been found that reducing the compressed dimensions of a telescoping cover is more difficult the larger the width of the cover. Practical experience shows that in order to avoid tilting of the telescoping cover and impeding its movement, the ratio of box width to box depth (measured in the longitudinal direction of the telescoping cover) must not exceed a certain value. Must be.

Particularly in the case of very wide covers, in order to be able to exceed the above experimental value (ratio of box width to box depth), it is necessary to insert a pinching member between the individual boxes to prevent the boxes from tilting. It is known that it should be placed in However, the use of such clipping members not only incurs considerable extra cost, but also causes damage to the cover if the dimensions of the clipping member in which a certain number of boxes are arranged exceed the compressed dimensions of the cover. The compressed size increases which is undesirable.

A telescoping cover of the type mentioned in the preamble of claim 1 is also known from German patent specification A-26 20 145. In order to guide the sliding movement of two consecutive boxes in the longitudinal direction, the following guide elements are provided on the side walls of these boxes. Inside the box,
A strip-shaped guide element extending over the length of the larger box and terminating at the end face of the box is attached with rivets, and a plurality of relatively short upper and lower guide elements are welded to the outside of the side wall of the smaller box.

In this known telescoping cover, the individual cover boxes overlap approximately half the box depth in the fully extended state of the cover.
This unusually large overlap is necessary in the known construction in order for guide elements provided on adjacent cover boxes to engage each other over a sufficient length.

A major disadvantage of this known telescoping cover is that the individual cover boxes require a large overlap area, which requires a large amount of material and therefore increases the weight of the telescoping cover. However, this known telescopic cover has the disadvantage that it is difficult to assemble and disassemble, since the guide elements are riveted and welded.

The main object of the invention is therefore to provide a telescoping cover of the type defined in the preamble of claim 1 in a material-saving and simple manner, especially in the case of very wide telescoping covers. The structure should be such that compressed dimensions can be obtained.

[Means for solving problems]

The above object is achieved by the characteristic structure set forth in claim 1 (see the Summary of the Invention section above). According to the configuration of the present invention,
A self-supporting structure is obtained and the compressed dimensions can be reduced (see Examples section below).

〔Example〕

Hereinafter, the present invention will be specifically explained based on preferred embodiments shown in the drawings.

1 to 5 show a first embodiment of the present invention, FIG. 1 is a side view of the same embodiment, FIG. 2 is a front view of a half thereof, and FIGS. 3 to 5 are FIG. 6 is a side view and a front view showing a guide element used in the same example. Although the invention consists of a plurality of boxes fitted into each other, only two boxes are shown for simplicity in the figures. Further, for the sake of clarity, only the guide elements provided between these two boxes are shown.

The boxes 1 and 2 each have a top wall 3, two side walls 4 (only one side wall is shown in FIG. 2) and a rear wall 5, as in the prior art. The extension movement of the box is limited by the upper edge 5a of the rear wall 5 of the box 1 abutting a stop 6 provided on the underside near the front end of the top wall 3 of the next larger box 2.

Three guide elements 7, 8 and 9 are provided to guide the boxes 1 and 2 during their relative movements (i.e. the extension and compression of the telescoping cover). Two of the outer guide elements 7 and 8 are provided on the outer surface of the side wall 4 of the box 1, and an inner guide element 9
is provided on the inner surface of the side wall 4 of the larger box 2. Here, and in the following description, only the guide elements provided on one side wall portion of each cover box will be described, but the same guide elements are also provided on the other side wall of each box.

Details of the shapes of the guide elements 7, 8 and 9 are given in the third section.
As shown in FIGS. FIG. 2 shows their engagement status. 3 guide elements 7, 8 and 9
all extend beyond the total length L of the box 1 or 2 to which it belongs (to which it corresponds) and protrude beyond this length by a dimension M.

The guide element 7 has an L-shaped cross section and is formed with a downwardly open groove 7a. This groove 7a is for engaging the flange 9a of the inner guide element 9. Similarly, the other outer guide element 8 is also formed with a groove 8a, which has an L-shaped cross-section and engages with the flange 9b of the inner guide element 9, in the l portion of its length (see FIG. 5a). There is. As shown in FIG. 1, the length of the portion l of the guide element 8 provided with the groove 8a is selected such that in the extended state of the cover this groove 8a is covered by the next large box 2. This prevents chips and other external objects from falling into the upwardly open groove 8a.

The guide elements 7, 8 and 9 suitably engage each other with a sliding gap, so that when the telescoping cover is extended or retracted, the boxes 1 and 2 can slide against each other without tilting. In the fully extended state shown in FIG. 1, the portion of the guide element projecting by a dimension M beyond the length of the corresponding box ensures to a certain extent the outer overlap of the boxes, so that a self-supporting device is constituted and the fixed guide There is no need to provide support for the individual boxes on the track.

On the other hand, when the telescopic cover is compressed, the boxes 1 and 2 can move one into the other until their respective rear walls 5 directly abut each other. This determines the minimum compressed size of the telescoping cover. The guide elements of the individual boxes protrude by a maximum M to the right of the last (maximum) box of the telescoping cover. For this purpose, the last box of the telescoping cover may be made longer by M, or other suitable cover devices may be provided. In this case, the last elongated box can be adapted to the sliding area at will.

In order to be able to easily disassemble such a telescopic cover, at least one of the three guide elements 7, 8, 9 can be removably attached to the corresponding box. For example, if the inner guide element 9 is fixed to the box 2 with screws, after loosening these screws and removing the guide element 9, lower the smaller box 1 and connect it to the upper edge 5a of the rear wall 5 of the box 1. When the box 2 is disengaged from the stopper 6, the box 1 becomes free.

In FIG. 1, the overlapping portion U between the boxes 1 and 2 in the extended state of the telescopic cover is very small, but in reality it is determined by the thickness of the rear wall 5 and the depth of the stopper 6. The smaller the overlap U¨, the less material is required for the entire telescopic cover.
Furthermore, even if the overlapping portion U¨ is small, the guide elements 7, 8 and 9 may be larger than the corresponding box 1 or 2 in dimension M.
This allows the box to be guided reliably without tilting during extension and provides a strong self-supporting device, eliminating the need for supporting means for each individual box on the guide track. Another advantage is that the lower edges 4a of the side walls 4 of all boxes can be made at the same height. This is because, due to the mutually engaging guide elements 7, 8, 9, there is no need to bend the side wall 4 at its lower edge so that a larger box engages under the next smaller box.

In the above-mentioned guide device, since the guide elements protrude by a certain dimension M from the length of each box, the box depth (length L) can be reduced to a desired value. Even if the width of the box (perpendicular to the drawing of FIG. 1) is very large, the compressed dimensions of the telescoping cover can be reduced by reducing L.

In Figures 1 and 2, only guide elements 7, 8 and 9 provided between boxes 1 and 2 are shown, but guide elements 7, 8 and 9 provided between boxes 1 and 2 are also shown between box 1 and the next smaller box and between box 2 and the next larger box. It is also possible to provide guide elements of similar construction that do not.

The embodiments of FIGS. 1 to 5 are suitable if there is sufficient space at the largest box of the telescoping cover to allow the guide element to protrude beyond the rear wall of the second largest box.

The embodiment described below, on the other hand, is suitable for cases where the space is extremely narrow.

In these examples, the guide device is completely inside the box and does not protrude beyond the box length upon compression of the cover.

In the second embodiment according to FIGS. 6 to 11, again three guide elements 17, 18, 19 are provided on the side wall 14.
It guides the boxes 11 and 12. One of the two outer guide elements 17, 18
One 17 is provided on the outer surface of the rear wall 14 of the box 11, and the other 18 is provided on the side wall 14 of the box 12.
provided on the inner surface of the

In this example, the inner guide element 19 is configured as a slide (sliding body) that slides between two positions, and when the boxes 11 and 12 are extended, the inner guide element 19 moves a certain dimension M from the right end face of the box 11, i.e., from the right end surface of the box 12. It protrudes from the left end surface (these two protrusion dimensions may of course be selected differently).

Details of the shapes of the three guide elements 17, 18, 19 are shown in FIGS. 8 to 10. In this example,
The lengths of all three guide elements are boxes 11 and 12.
It matches the length L.

The outer guide elements 17, 18 are in the form of long strips with an L-shaped cross section. These are arranged in such a way that grooves 17a, 18a are formed for engagement with the flanges 19a, 19b of the inner guide element 19.

Inner guide element 19 configured as a slide
has a longitudinal slot 19c in which two
Two stops 20a, 20b provided on one box 11, 12 are engaged. These stops are constructed in the same shape as shown in FIG.

In particular, as can be seen from Figure 7, the stop 20
The thickness of a, 20b is slightly less than half the thickness of the longitudinal slot 19c provided in the inner guide element 19. Moreover, they are arranged in two different planes, one behind the other (adjacent to each other in the cross-section of FIG. 7), and are offset relative to each other by at least half the thickness of the longitudinal slot 19c. There is. The two stops 20a, 20b thus act to fit into each other when the boxes 11 and 12 are pulled apart, pushed together and finally assume the fixed position.

The longitudinal slot 19c provided in the inner guide element 19 is open over substantially the entire length of the guide element 19, except on its two wide sides.
Stop 20 engaging longitudinal slot 19c
a, 20b rest against the longitudinal slot at both ends thereof. FIG. 6 shows that the stop 20a provided in the box 11 is inserted into the longitudinal slot 19.
The stop 20b provided in the box 12 is in contact with the left end of the box 19c, and the stop 20b is in contact with the right end of the longitudinal slot 19c (the fully extended state of the telescopic cover). The extension movement of the telescopic cover in this embodiment is therefore limited by the stops 20a, 20b cooperating with the inner guide element 19. However, instead of this, the extension movement of the cover is
It can also be limited in the manner described for the figures (by the rear wall of the box and the stop of the next larger box). In that case, the stop 20a,
20b serves only to hold the guide element 19 in the correct position between the boxes 11, 12 and to move the guide element 19 with the boxes when the boxes are pulled apart or pushed together.

From the above description, it will be seen that when the boxes 11, 12 are pressed together, the guide element 19 is initially stationary and the stop 20a of the box 11 moves to the right in the longitudinal slot 19c. The stop 20a has a longitudinal slot 19c.
When the right end of the box 11 is reached, the guide element 19 is moved together with the box 11 in a direction that further compresses the box 11, and the guide element 19 is completely compressed together with the box 11.
Put it in 2.

The third embodiment shown in FIGS. 12 and 13 largely corresponds to the embodiment shown in FIGS. 6-11. Therefore, the same parts as in FIGS. 6 to 11 are given the same reference numerals.

In the embodiments of FIGS. 12 and 13, the structure of the sliding inner guide element 19 is different. The longitudinal slot 19c is covered until the wide outer part of the guide element 19 is reached by the part of the inner guide element 19 which projects by a dimension M than the next larger box 12 when the boxes 11, 12 are extended. Chapter 13a
In FIG. 13b, the covered portion (cover) is designated by the reference numeral 19c'.

This cover 19c' has a longitudinal slot 19c
protrudes when the slot 19c is extended to prevent chips or external objects from entering the slot 19c and interfering with its operation. As shown in FIG. 13, the thickness of the cover 19c' is made slightly less than half the thickness of the guide element 19. In this way, the movement of the stop 20a provided on the box 11 is controlled by the cover 19.
unhindered by c′. On the other hand, the length of the cover 19c' is the length of the stop 20 provided on the box 12.
b is selected such that it can freely engage the opening of the longitudinal slot 19c.

As can be seen from FIG. 12, in this example, the dimension M of the guide element 19 that protrudes from the box 12 when extended, and the dimension M of the guide element 1 that protrudes from the box 11.
It is different from the dimension M ^* of 9. Similar to the embodiment described above, in the embodiment of FIGS. 12 and 13, the inner guide element 19 is pushed to the right when the boxes 11 and 12 are compressed.

In the fourth embodiment shown in FIGS. 14 to 18, three guide elements 27, 28, 29 are again provided between the boxes 21, 22. Of these, the guide element 27 is connected to the side wall 2 of the box 21.
4, the guide element 28 is attached to the inner surface of the side wall 24 of the box 22,
The guide element 29 is configured as a movable slide.

Details of the shape of the guide elements 27 to 29 are shown in FIGS. 16 to 18. The two outer guide elements 27, 28 have ear-shaped stops 27a, 27b and 28a, 28b, which respectively correspond to the stepped projections 29a, 2 of the inner guide element 29.
9b, 29c, and 29d. The guide elements 27, 28 are constructed as strips with an approximately L-shaped cross-section and are formed with grooves 27c or 28c which open downwardly or upwardly, respectively, and which engage flanges 29e or 29f of the guide element 29, respectively. .

As shown in FIG. 17b, the inner guide element 29
The step projections 29a to 29d are at most half as thick as the guide element 29, one behind the other (adjacent to each other in FIG. 17b).
They are arranged in two different planes and are offset relative to each other by at least half the thickness of the inner guide element 29. This results in an ear-shaped stop 27 of the guide element 27, as shown in FIGS. 14 and 15.
a, 27b and the stepped protrusion 29a of the guide element 29,
29b, and between the ear-like stops 28a, 28b of the guide element 28 and the stepped projections 29c, 29d of the guide element 29.

For example, if the box 21 is now pushed toward the box 22 from the fully extended state shown in FIG. 14, the sliding guide element 29 will initially be
The ear stop 27a of the guide element 27 remains stationary until it abuts the step 29a of the guide element 29. If you move box 21 further to the right,
Guide element 29 is moved by guide element 27 until box 21 is pushed completely into box 22.

The lengths of the guide elements 27, 28 and 29 are selected in this example such that, in the fully compressed state of the box, the three guide elements 27, 28, 29 project beyond the corresponding cover box by a dimension M'.
Of course, in the present invention, the guide elements 27, 2
The lengths 8, 29 may be the same as the boxes 21, 22, as in the two embodiments described above, so that the guide element does not protrude from the box when the box is fully compressed.

When the telescopic cover is extended, the sliding guide element 2
9 projects from the left end surface of the box 22 by a dimension M, and from the right end surface of the box 21 by a dimension M.
(or different dimensions).

Side wall 2 of box 21 to which guide element 27 belongs
On the outer side of 4 another guide element 30 is attached. This guide element 30 is in the form of a flat strip of the same length as the box, which also engages in the longitudinal groove 29g of the inner guide element 29 and guides the inner guide element 29 during movement.

Next, another example of a stop structure for a telescoping cover equipped with a guide element device according to the present invention is shown in FIG.

FIG. 19 shows a telescoping cover consisting of ten boxes 31 to 40 in the compressed state.

A strip 31a-39a (optionally including a stopper element) is provided on the underside of the front edge of each box 31-39. The stepped stops 32b to 40b are connected to the boxes 32 to 40.
installed at the rear end of the The stop 32b has a rear surface 33c of the stop of the next small box during compression.
comes into contact with.

Now, when the largest box 31 is moved to the left from the compressed position of FIG. 19, the strip 31a
hits surface 35d of stop 32b and moves the next small box 32 with it. Similarly,
Other boxes will also be dragged along. When the telescopic cover is compressed, the rear wall 31e of the box 31 first
comes into contact with the stepped surface 32c of the stop 32b with its upwardly bent portion 31e', whereby the box 32 is moved together. Next, the stop 32b of the box 32 comes into contact with the stepped surface 33c of the box 33, and the box 33 is moved together.

As shown in FIG. 19, only box 36 has an extension 36f, such as a rear wall, by which box 36 is supported on a suitable fixed track. All other boxes do not have such supports. However, this is only possible if the guide device of the invention described with reference to FIGS. 1 to 18 has the ability to self-support each adjacent box. Therefore, the support 36f for the central box 36 may optionally be omitted if the telescoping cover is configured to be self-supporting over its entire length.

FIG. 19 also shows how the compressed dimensions of the telescoping cover can be reduced by omitting the rear wall of the individual boxes and by making the stops step-like and associated. The guide devices provided between the individual boxes may be constructed according to any of the various examples described with reference to FIGS. 1 to 18.

The present invention is capable of many variations within the scope of the claims. For example, if the telescopic cover has a heavy structure, three guide elements are not provided as in the above embodiment to guide two adjacent boxes.
Preferably, at least four guide elements are each provided in a two-layer structure (ie one on top of the other).

Furthermore, the outer guide elements arranged near the edges of the side walls of the box (i.e. the lower guide elements in the horizontal position of the telescoping cover) can also be configured as sliding elements at the same time and can slide on fixed guide surfaces relative to this box. Can be used as a support. These outer guide elements projecting from the side wall edges of the box serve not only as a slidable support but also for sealing the box on the guide track.

For vertically placed telescoping covers,
The self-supporting structure achieved by the invention is particularly advantageous. This is because it is no longer necessary to fasten the individual boxes of the cover to the vertical machine base by means of removable slides or, in particular, engagement elements, which in conventional arrangements is complicated to assemble and disassemble. In contrast, the telescopic cover according to the present invention
Simply screwing on the front side of the table to the machine tool results in a continuous self-supporting device with guide elements acting as slides on the front side of the table.

A fifth embodiment of the invention is shown in FIGS. 20 and 21. an outer guide element 4 which both protrudes by a certain dimension M from the length of the corresponding boxes 41, 42;
Among the guide elements 7 and 48, one guide element 47 is provided on the outer surface of the side wall of the box 41, and the other guide element 48 is provided on the inner surface of the side wall of the next larger box 42. In this example, the inner guide element consists of a plurality of balls 49 rolling in guide tracks of circular cross section formed between guide elements 47,48. These balls 49 engage between guide elements 47, 48 (see FIG. 21).
Ball 49 serves as a guide between guide elements 47 and 48.
Stop 50.5 to avoid falling off the truck.
1 (preferably removable) are provided at the right end of the guide element 47 and the left end of the guide element 48.

Instead of the balls provided in the embodiment of FIGS. 20 and 21, rollers or gearing elements (for example pinions) can also be provided as inner guide elements. In this case, they will engage with an outer guide element configured as a rack.

Note that the cross-sectional shapes of the guide elements described in the embodiments of FIGS. 1 to 18 are merely examples. For example, instead of a stepped L-shaped guide element as shown in FIG. 2, guide elements with mutually engaging inclined boundary surfaces may be provided. Furthermore, the inner guide element can also be designed, for example, as a sliding bar with a circular cross section. Thus, highly variant designs are possible within the scope of the claims.

It is also possible to use different types of guide elements in the same telescopic cover. For example, the thickness and length of the guide elements can be increased to account for the increased loads on the individual boxes in a self-supporting structure. Furthermore, in a telescopic cover with a rear wall of conventional construction, there is a larger space behind the rear wall of the smallest box when compressed than behind the largest box, which is convenient for protruding the guide element. In such a case, it is advantageous, for example, to attach the guide element to the smaller box and to provide the larger box with a movable guide element that does not protrude during compression.

In summary, the invention makes it possible for the first time to move the supporting, guiding and sliding devices of a telescoping cover largely (and if necessary completely) away from fixed guide tracks and onto the telescoping cover itself. This avoids many of the problems caused by high stresses on the guide tracks from lubricated (taking into account grinding and metal debris) in conventional constructions. Thus, the self-supporting telescopic cover according to the invention serves to protect the critical fixed guide tracks due to the guiding device integrated into the cover itself.

A sixth embodiment of the present invention is shown in FIGS. 22 to 26.

Three boxes 61, 62, 63 are shown, between which two inner guide elements 64, 65 are arranged in the form of slides.

25 and 26 are top and cross-sectional views of guide element 64 showing the structure of these similar guide elements 64, 65. It consists of two slides 66, 67 of different lengths, which are rigidly connected to each other at one end by a connector 68. The two sliding parts 66, 67 have the same rail-like cross-sectional shape, and their two long edges are bent at right angles. Both slides 66, 67 are held parallel to each other by a connector 68, and the distance between the two slides is selected such that the side wall of the associated box can be inserted into the space 69 between them (see FIG. 23).

Consider now the sliding inner guide element 64 provided in the minimum box 63. As shown in FIG. 23, the longer sliding portion 66 is disposed on the inner surface of the side wall of the box 63, and the shorter sliding portion 67
is placed on its outer face.

The inner side of the box 63 is provided with two outer guide elements 70, 71, which are fixed to the inner side of the side wall of the box 63. The outer guide elements 70, 71, as well as all other outer guide elements described below, have the same cross-sectional shape as the slides 66, 67, so that all elements of the guide device can be made of just one drawn cross-section. can.

The guide element 70 has the same length as the longer sliding part 66 . In contrast, the guide element 71 has exactly the same length as the shorter slide 67. The long sliding portion 66 of the inner guide element 64 engages with the outer guide elements 70,71.

The two outer guide elements 72 and 73 have the same length as the long sliding part 66 and engage with the short sliding part 67 of the inner guide element 64, and are arranged on the inner surface of the lower half of the central box 62. be done. Thus, the four outer guide elements 70, 71, 72, 73 engage the sliding inner guide element 64, with only one of the outer guide elements 71 being shorter in length.

The side wall of the box 63 is surrounded by an inner guide element 64 and has a receiving part 74 at the rear. Receiving part 74
Then, the connectors 68 of both the sliding parts 66 and 67 are engaged. However, the inner guide element 64 should not protrude beyond the length of the corresponding box 63 when the cover is compressed (see FIG. 22).

Next, consider the guides provided in boxes 61 and 62. Surrounding the side wall of the box 62, an inner guide element 65 is arranged at a different height than the inner guide element 64. The guide element 65 has a similar structure to the guide element 64 described above, and there is no need to add any special explanation. The long sliding part 66 of the guide element 65 is arranged on the inner side of the side wall of the box 62, and the short sliding part 67 is arranged on the outer side thereof.

The guide element 65 includes four outer guide elements 7
2, 75, 76 and 77. Of these, the outer guide element 72 has already been described.
Guide element 75 is attached to the inner surface of the side wall of box 62, and outer guide elements 76 and 77 are fixed towards box 61. This arrangement allows
The outer guide element 72 is a sliding guide element 6
4 and 65.

When the cover is extended, box 62 first moves to the right relative to box 63. At this time, the box 63 is considered to be in a stationary state, and the sliding guide element 64 is also initially stationary (second
Figure 2). When extended by a certain distance, box 62
A stopper 78 (see FIG. 24 (a sectional view taken along the line - in FIG. 23)) provided on the side wall of the slide guide element 64
It corresponds to the left end of 7. Further movement of the box 62 to the right causes the internal guide element 64 to be withdrawn until it assumes the position shown in broken lines in FIG. box 6
2, 63 is restricted to the above-mentioned position by a stopper 78 provided on the inner surface of the box 62 coming into contact with the rear edge 79 of the box 63 (see FIG. 22). Alternatively, the slightly upwardly rotated portion 80 provided on the front surface of the sliding guide element 64 hits the left end of the short guide element 71, so that it is restricted.

When the cover is compressed, the plate-shaped engagement piece 81 provided on the inner surface of the side wall of the box 62 hits the right end of the short sliding portion 67, and the guide element 64 is pressed again.
into the fully compressed position on the left side of Fig. 22 (see Fig. 24).
(see figure).

As can be seen from the above description, in this embodiment, the guide device is constructed so that the sliding inner guide element is located between the boxes and does not move outward at any position during the movement of the telescopic cover. Contamination of the device and the ingress of shavings and other external objects are avoided to the greatest extent possible.

This guide device can be easily disassembled by simply loosening the screw of the engagement piece 81.

Of course, within the spirit of the invention, it is also possible to arrange the guide device on the outside if necessary (for example, if the telescoping cover is likely to slip due to shavings or be contaminated from the inside).

[Effect of idea]

As explained above, the invention allows for small compressed dimensions even in the case of telescoping covers with very wide boxes and saves material due to the self-supporting structure. Furthermore, it is easy to assemble and disassemble.

[Brief explanation of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention;
Figure 2 is a front view of the half of the first embodiment, Figures 3a and b
Figures 5a to 5b are views showing details of the guide element of the first embodiment, Figure 6 is a side view showing the second embodiment of the present invention, and Figure 7 is a half view of the second embodiment. Front view of section, 8th a, b to 10th a, b
11 is a diagram showing the stop of the second embodiment, FIG. 12 is a side view showing the third embodiment of the present invention, and FIG. 13 is a diagram showing the inner guide element of the third embodiment, FIG. 14 is a side view showing the fourth embodiment of the present invention, FIG. 15 is a front view of a half of the fourth embodiment, FIG. 16a, Figures b to 18a and b are views showing details of the guide element of the fourth embodiment, Figure 19 is a side view showing a stop device that can be used in the present invention, and Figure 20 is a view showing the fifth embodiment of the present invention. FIG. 21 is a sectional view of the main part of the fifth embodiment, FIG. 22 is a side view partially cut away in section showing the sixth embodiment of the present invention, and FIG. 23 is FIG. 22. of-
24 is a sectional view taken along the - line in FIG. 23, and FIG. 25 is a top view showing the sliding guide element of the sixth embodiment.
FIG. 6 is a sectional view taken along the - line in FIG. 25. 1, 2, 11, 12, 21, 22, 31-4
0, 41, 42, 61, 62, 63... multiple boxes, 3... ceiling wall, 4, 14, 24... side wall,
7, 8, 17, 18, 27, 28, 47, 48,
70, 71, 72, 73, 75, 76, 77...
outer guide element, 9, 19, 29, 49, 64,
65...Inner guide element.

Claims (1)

[Scope of Claims] 1 It has a plurality of boxes 1 and 2 that are fitted into each other, and each box has at least a top wall 3 and two side walls 4, and the box is slidable in the longitudinal direction on the side walls. At least three guide elements 7 for guiding two adjacent boxes, with guide elements 7, 8, 9 for guiding and having stops for limiting the extension movement thereof;
8, 9 are provided, of which the first and second outer guide elements 7, 8 constitute two guides fixed to the corresponding box, and the third inner guide element 9 is connected to the two outer guides. In a telescoping cover adapted to be guided between the elements 7, 8 and to engage on their back sides, (a) at least one guide element 7, 8, 9
(b) at least one of the three guide elements is removable from the corresponding box; (b) at least one of the three guide elements is removable from the corresponding box; Stretchable cover. 2. In the telescopic cover according to claim 1, (a) the two outer guide elements 7, 8 are fixed to one box 1, the inner guide element 9 is fixed to the other box 2, and ( b) All three guide elements 7, 8, 9 mentioned above are
A telescoping cover that extends beyond the total length L of a corresponding box and projects beyond the length of that box by a specific dimension M. 3. In the telescopic cover according to claim 2, the two guide elements 7, 8 are provided on the outer surface of the side wall 4 of one box 1, and the inner guide element 9 is provided on the outer surface of the side wall 4 of one box 1. A retractable cover placed on the inside surface of the side wall. 4. In the telescopic cover according to claim 3, the lower one of the two outer guide elements 7, 8 is provided only over a part l of its length,
A telescopic cover having an upwardly open groove 8a to be covered by the next larger box 2 and to engage said inner guide element 9 when extended. 5. The telescopic cover according to claim 1, wherein the guide element, for example 9, is removably attached to the corresponding box 2 with a screw. 6. In the telescopic cover according to claim 1, (a) one of the outer guide elements 17, 18 is fixed to the outer surface of the side wall 14 of the box 11, and the other guide element is fixed to the outer surface of the side wall 14 of the box 11; Box 12
(b) said inner guide element 19 slides between two positions so that when the boxes are extended, the two boxes 1
A telescopic cover configured as a slide projecting by a certain dimension M beyond 1,12. 7. The telescopic cover according to claim 6, wherein the inner guide element 19 has a longitudinal slot 19c, in which the two boxes 1
Two stops 20a, 2 fixed to 1, 12
0b are engaged and these stops are telescoping stops adapted to move said inner guide element 19 against the ends of the longitudinal slot 19c during outward movement of the box and to limit outward movement. cover. 8. The telescoping cover according to claim 7, wherein the longitudinal slot 19 has a large thickness.
two stops 20a equal to half the length of c,
20b are arranged in two planes adjacent to each other and offset from each other by half the thickness of said longitudinal slot. 9. A telescoping cover as claimed in claim 8, wherein said longitudinal slot 19c is completely open over the entire length of said inner guide element 19 except for the two wide sides. 10. A telescoping cover according to claim 7, in which the longitudinal slot 19c protrudes beyond the length of the next larger box 12 when the boxes 11, 12 are extended. , a telescoping cover covering the outer wide side of the inner guide element; 11. A telescoping cover according to claim 6, in which the two guide elements 27, 28 have ear-like stops 27a, 27b, 28a, 28b, which, when the boxes 21, 22 are extended, Stepped projections 29a to 29 of element 29
d, a telescoping cover adapted to drag said inner guide element 29 against it and to limit said extension movement. 12. The telescopic cover according to claim 11, wherein the stepped projections 29a to 29d of the inner guide element 29 have a thickness at most equal to half the thickness of the inner guide element and are adjacent to each other. The inner guide element 29 is arranged in two planes.
telescopic covers that are offset from each other by half the thickness of the 13. A telescoping cover according to claim 11, in which a further guide element 30 engages in the longitudinal slot 29g of the inner guide element 29.
is mounted on the outer surface of the side wall of one box 21 with an outer guide element 27. 14. The telescopic cover according to claim 6, wherein the lengths of the three guide elements all match the length of the box, and the inner guide element is completely pushed in when the box is compressed. Telescoping cover. 15. The telescopic cover according to claim 6, wherein the lengths of the three guide elements are all greater than the length of the box, and when the box is compressed, the guide element extends beyond the two corresponding boxes to the next larger length. A retractable cover that protrudes into the box. 16. The telescopic cover according to claim 1, wherein the box has a stop at the rear end of its top wall, and during the extension movement, this stop is a strip 3 provided on the lower front end of the next larger box.
1a to 39a, when the cover is compressed, the stepped stops 32b to 40b move to the rear surface 32c to 39c of the stop belonging to the next smaller box.
A retractable cover with a stop that protrudes backwards and downwards. 17. Telescopic cover according to claim 1, in which at least four guide elements are provided in a two-layer structure for guiding two adjacent boxes, especially for heavy structures. 18. The telescoping cover according to claim 1, in which one of the two outer guide elements
A telescopic cover configured as a sliding element which at the same time serves as a sliding support for the box on the fixed guide surface. 19. In the telescopic cover according to claim 1, (a) one of the two outer guide elements 47, 48 protruding by a specific dimension M beyond the length of the corresponding box 41 or 42, respectively; (b) the inner guide element comprises at least one, preferably a plurality of balls 49, rollers or A telescopic cover composed of gear device elements. 20 In the telescopic cover according to claim 6, (a) the sliding inner guide elements 64, 65;
consists of two sliding parts 66 and 67 of different lengths, one sliding part 66 is arranged on the inner surface of the side wall of one box 63, and the other sliding part 67 is arranged on the outer surface of the side wall of one box 63. (b) one sliding part 66 is arranged on two outer guide elements 7 provided on the inner surface of one box 63;
(c) the other sliding part 67 is adapted to engage with two outer guide elements 72, 73 provided on the inner surface of the next larger or smaller box 62; Telescoping cover. 21. In the telescopic cover according to claim 20, three consecutive boxes 61, 6
The two inner guide elements 64, 65 disposed between the central box 62 and the common outer guide element 72 disposed on the inner surface of the central box 62 engage the inner guide elements 64, 65. Telescoping covers at different heights to suit your needs. 22. The telescoping cover according to claim 20, in which four outer guide elements 70, 71, 72, 73 engage with one inner guide element 64.
A telescopic cover in which only one outer guide element 71 is short in length. 23. In the telescopic cover according to claim 20, the outer guide elements 70, 71, 7
2, 73, 75, 76, 77 and the two sliding parts 66, 67 of the inner guide elements 64, 65 have the same cross-sectional shape. 24. The telescopic cover according to claim 22, wherein the short guide element 71 has the same length as the short sliding part 67 of the inner guide element 64,
Sliding portion 6 with long guide elements 70, 72, 73
A telescopic cover with the same length as 6. 25 In the telescopic cover according to claim 20, the side wall of the cover box has a receiving part 74 at the rear, and the two sliding parts 6 are attached to this.
6 and 67 are engaged so that the inner guide element 64 does not protrude beyond the length of the corresponding box when the cover is compressed. 26. The telescopic cover according to claim 20, wherein the inner guide element 64 abuts against the stopper 78 of the next large box 62 at one end of the short sliding portion 67 during the extension of the cover. During dragging and compression of the cover, the telescopic cover is adapted to be dragged by abutting a removable engagement piece 81 provided on the next large box 62 at the other end of the short sliding portion 67. 27 In the telescoping cover according to claim 22, the rear edge 79 of the next small box 63
A telescopic cover whose extension movement is restricted by the contact of the stopper 78 with the inner guide element 64 and/or by the upper rotating part 80 provided at the front part of the inner guide element 64 with the short guide element 71.