EP3332167A1

EP3332167A1 - Plastic slider

Info

Publication number: EP3332167A1
Application number: EP16750802.7A
Authority: EP
Inventors: Matthias May
Original assignee: Hema Maschinen und Apparateschutz GmbH
Current assignee: Hema Maschinen und Apparateschutz GmbH
Priority date: 2015-08-07
Filing date: 2016-08-08
Publication date: 2018-06-13
Also published as: JP2018535371A; DE202015104146U1; JP6600091B2; WO2017025518A1; CN107923570A

Abstract

The invention relates to a plastic slider for attaching to slats (50) or frame parts of metal of a variable-length protective cover, wherein the plastic slider (12) has fastening means (16), by means of which the plastic slider can be fastened to a slat (50) or a frame part of metal, and has at least one sliding surface (14), which is intended for contacting a stationary sliding track. In order to create a plastic slider that is universally suitable for supporting and guiding protective covers without high production complexity being necessary, the plastic slider according to the invention has two parts (10, 30), which can be fastened to each other by means of the fastening means in such a way that the slat (50) or frame part lies between said parts.

Description

Plastic glides

The present invention is concerned with a plastic slider for lamellae or frame members made of metal of a variable-length protective cover, wherein the plastic slider fastener by means of which it is fastened to a lamella or a frame part made of metal, and at least one sliding surface which is for engagement with a stationary slide is determined.

Such protective covers, which consist of a plurality of lamellae, which are connected by a bellows or overlapping lamellae in conjunction with elastic coupling elements, possibly using metallic frame parts, are used, for example, in machine tools to shield the working spaces. The lamellae made of sheet metal or plastic are aligned substantially perpendicular to slideways, which support them in their movement. In order to avoid direct contact of the slats with the slideway, it is known and customary to use plastic glides, which consist of suitable materials, as they are used for example in plastic bushings. It is customary to attach the plastic glides on a separate PVC web, the then riveted to the slats or the metallic frame parts. By this type of attachment creates a relatively high cost and the replacement of the slider is very time consuming. From DE 20 2012 008 922 U1 a so-called guide element is known, which is specifically intended for cooperation with a guideway over which not the weight of the slats and the curtain is derived. The described guide element made of plastic is clipped directly into an opening of the lamella, wherein the support is supplemented by a receiving leg which comprises the edge of the lamella. It has been shown that such a design of a plastic slider for higher loads is not sufficient.

The object of the present invention is to provide a plastic glides, which is universally suitable for the storage and management of protective covers, without a high production cost would be necessary.

According to the invention the object is achieved in that in a plastic slider of the type mentioned has these two parts which are fixed to each other by fastening means with the interposition of the lamella. It has been shown that can be achieved by a suitable conventional design of the fastening means by this two-part training a particularly secure hold of the plastic glides on the slats or on the metallic frame parts, with an accurate position of the sliding surface is relatively achievable to the slat. The fastening means are intended to pass through recesses in the lamella, so that the positioning is achieved in a particularly simple manner. At the same time the problematic direct connection between the plastic slider and the generally very thin slats formed by the stabilization of the two parts is primarily made to each other and less to the blade. This can in particular reduce the game in a direction perpendicular to the blade effectively, so that even under high normal loads on the sliding surface results in a tilt-free anchoring.

Particularly preferred is an embodiment in which the fastening means comprise at least one closure element and at least one positioning element. Due to the separate training, it is possible to optimize the closure elements with respect to the anchoring of the two parts together, while the positioning elements in cooperation with a Recess in the lamella with low production costs nevertheless allow an exact and virtually backlash determination of the mounted plastic slider on the lamella.

In addition to the possibility of riveting or welding together the two parts of the plastic slider, an embodiment is particularly preferred in which the at least one closure element is designed as a closure pin, which is formed on a part of the plastic slider and engages in a closure opening of the other part. Depending on the load and training possibly existing positioning can be provided according to two, three or more such closure elements.

An exemplary embodiment of a closure pin provides that the closure pin is centrally slotted and at its free end has at least one radial projection which engages behind the edge of the closure opening of the other part. In a preferred embodiment of the invention it is provided that the fastening means have at least one positioning element, which is arranged in a defined position to the sliding surface. Such positioning elements may for example be positioning pins which engage in corresponding cross sections of positioning openings in the lamella. Circular openings can be introduced with high accuracy in the slats, while on the other hand, the manufacture of the positioning is unproblematic. In this way, it is very easy to achieve an exact positioning of the slider relative to the lamella. It is also possible to choose cross-sectional shapes for the positioning pins, in which already a single positioning pin defines the positioning in directions parallel to the plane of the blade. However, it is also possible, for example, to select two positioning pins with a circular cross-section.

In a particularly preferred embodiment of the invention it is provided that the positioning pins engage in correspondingly shaped recesses of the other part of the plastic slider. In this way, the second part is positioned exactly, which is particularly advantageous if at least one further sliding surface is provided on this part. An additional sliding surface can improve the running and running noise and also allow a longer service life.

An embodiment is preferred in which on a part of the plastic slider all projecting parts of the fastening means are provided which are suitable for reaching through openings. gene in the lamella are determined, and on the other part corresponding openings are formed to cooperate with the projecting parts. This arrangement avoids that both parts must be aligned when mounting to the slat. For putting in an over-determination of the situation with respect to the lamella is avoided.

The subject of the present invention is also a lamella for a variable-length protective cover, which has one or more plastic gliders of the aforementioned type, which are intended to rest on a sliding track, wherein it has openings through which the fastening means of the plastic slider protrude. Preferably, the lamella has precisely fitting openings which are adapted to the cross section of the positioning elements, as well as openings through which separate connecting elements can be passed. Accordingly, the slats bearing frame parts can be equipped with the glides according to the invention.

The subject of the present invention is furthermore a protective curtain having a plurality of lamellae of the type described above, which are elastically connected to one another by a bellows or other flexible elements.

Hereinafter, reference will be made to embodiments of the invention with reference to the accompanying drawings. Show it:

Fig. 1 is a perspective view of a first part of a plastic slider;

Fig. 2 is a perspective view of a second part of a plastic slider;

3 shows a partial view of a slat for a variable-length protective cover;

FIG. 4 shows the lamella according to FIG. 3 with inserted first part of the plastic slider; FIG.

FIG. 5 shows the lamella according to FIG. 3 with the plastic slider fully assembled; FIG.

6 shows a further embodiment of a first part of a plastic slider;

7 shows a further embodiment of a first part of a plastic slider;

Fig. 8 shows yet another embodiment of a part of a plastic slider. In Fig. 1, a first part 10 of a plastic slider 12 (see Fig. 5) is shown, which has a substantially L-shaped basic shape. The first part 10 of the plastic slider is plate-like and defines an L-shaped sliding surface 14 for engagement with a stationary slideway for a variable length Schutzbehang, as used for example in machine tools used to shield the work spaces. The first part 10 is made of a suitable plastic and is provided on one side with fastening means 16 which are integral are formed with the plate-shaped base body 18. The fastening means 16 are divided into closure elements 20 and positioning elements 22, two of which are provided in each case. The closure elements 20 are formed centrally with a slot 24 and have at their projecting end radial projections 26. Due to the slot 24, the ends of the closure elements 20 can move in one direction to each other, which will be discussed later in more detail.

The positioning elements 22 are formed as shorter pin-like projections, wherein they have rounded edges 28.

The second part 30 for forming the plastic slider 12 is shown in FIG. It also consists of an L-shaped base plate 32 with an L-shaped sliding surface 34. Corresponding to the fastening means 16 of the first part 10, the second part 30 has aligned mounting holes 36, wherein flush with the closure elements 20 closing openings 38 and aligned to the positioning elements 22 positioning holes 40 are arranged. The diameters of the closure openings 38 are dimensioned so that their diameter is smaller than the diameter of the radial projections 26 of the closure elements 20, so that they lock behind the closure openings 38. The positioning holes 40 have a diameter adapted to the positioning elements 22, so that the second part 30 is positioned relative to the first part 10 during locking.

The attachment of the presented in its two items plastic slider 12 to a corresponding blade is shown in Fig. 3-5. Fig. 3 shows a blade 50, as it is used to build a variable-length Schutzbehangs. The lamellae 50 have an L-shaped cross-sectional shape with a mounting leg 52 and serving as a panel 54 legs, the legs 54 a plurality of successively arranged lamellae are formed parallel overlapping, so that the length variability is possible with a change in the distances of the mounting legs 52. The lamellae 50 are held on slide tracks (not shown), which protrude into a recess 56 in the exemplary embodiment of a lamella shown in FIGS. 3 to 5. Since the metallic contact of the fins 50 on the slideways is undesirable, plastic sliders 12 are used, as have been shown in their parts in Figs. 1 and 2.

In the attachment legs 52 of the lamellae 50, holding openings 58 corresponding to the side of the recess 56 are provided, which are arranged in through openings 60 for the encryption key. elements 20 and guide openings 62 for the positioning elements 22. The diameter of the passage openings 60 is chosen to be greater than the outer diameter of the radial projections 26, but may possibly also be formed slightly smaller. The diameters of the guide openings 62 are adapted to the diameter of the positioning elements 22, so that the first part 10 with respect to the lamella 50 during insertion, as shown in Fig. 4, are aligned.

As can be seen well, the sliding surfaces 14 over the edge of the recess 56, so that a running through the recess 56 slideway is always only in sliding contact with the plastic slider 12. The leg 54 which is angled away from the fastening leg 52 can not come into contact with the sliding track in terms of design.

To complete the attachment, the second part, as shown in Fig. 5, placed on the first part, d. H. the fastening leg 52 then lies between the two parts 10, 30 of the plastic slider 12. In this case, the radial projections 26 of the closure elements 20 lock behind the closure openings 38 of the second part, while the positioning openings 40 in cooperation with the positioning elements 22 ensure that the sliding surfaces 14, 34 of the two parts 10, 30 are aligned with each other. In principle, embodiments are also possible in which only one of the two parts forms the sliding surface, but depending on the load it may be desirable to increase the sliding surface accordingly.

Depending on the embodiment of the lamellae and thus protective curtains to be constructed, the plastic glides may also have completely different basic shapes than the plastic gliders shown in FIGS. 1 to 5. In simple cases, plastic glides 100 may be provided, for example, according to FIG. 6, which have a substantially rectangular base plate 102. Shown in Fig. 6 again only the first part 1 12 of the plastic slider 100 with the two closure elements 120 and the two positioning elements 122, which in turn correspond to the closure and positioning of the embodiment described above. The second part is designed accordingly, d h. It has a suitable arrangement of closure and positioning holes in order to determine the first part 1 12 on a slat positionally accurate. The second part may again correspond to the first part in its basic form, but if a sliding surface 14 is to be formed only on the first part 12, it may also have smaller dimensions in this area. A further exemplary embodiment of a first part 212 of a plastic slider 200 is shown in FIG. 7, again having two closure elements 220 and two positioning elements 222. In this case, a cylindrical sliding surface 214 is formed in the middle of the first part 212, which is suitable for cooperation with a cylindrical slideway.

The counterpart matching the first part 212 of a plastic slider 200 shown in FIG. 7 is again designed accordingly, wherein a second sliding surface can again be provided, but need not be provided. Finally, another embodiment of a first part 312 of a plastic slider 300 is presented in FIG. 8, in which a U-shaped sliding surface 314 is formed. For better stabilization, four closure elements 320 are provided in this embodiment, which are fixed in exact position by means of two positioning elements 322 on a second part, which in turn may have a basic shape corresponding to the first part 312.

As can be seen from the different embodiments of plastic glides 12, 100, 200, 300, the nature of the gliding path is dictated by which shape the glides are intended to interact with. The formation of the closure and positioning then takes place after the expected stress, in particular for the closure elements, other cross-sectional shapes are conceivable that can cooperate locking in corresponding recesses of the other part. With regard to the positioning elements, the pairwise provision of cylindrical pins has proved to be advantageous because they can interact with simple punched openings in the lamellae. However, it is also possible to use other cross-sectional shapes, in which case a single guide element may already be sufficient to secure the plastic slider to the lamella 50 in a defined position.

Claims

claims

Plastic glides for lamellae (50) or frame parts made of metal of a variable-length protective cover, wherein the plastic slider (12; 100; 200; 300) has fastening means (16) by means of which it can be fastened to a lamella (50) or a metal frame part, and at least a sliding surface (14; 1 14; 214; 314) intended for abutment with a stationary sliding track, characterized in that the plastic slider has two parts (10, 30; 1 12; 212; 312) passing through the fastening means with the interposition of the lamella (50) can be fixed to each other.

Plastic slider according to claim 1, characterized in that the fastening means (16) comprise at least one closure element (20; 120; 220; 320) and at least one positioning element (22; 122; 222; 322).

Plastic slider according to claim 2, characterized in that the at least one closure element (20; 120; 220; 320) is designed as a closure pin which is arranged on a part (10; 1 12; 212; 312) and inserted into a closure opening (38 ) of the other part (30) engages.

Plastic slider according to claim 3, characterized in that the at least one closure pin (20) has a slot (24) in the middle and at its free end a radial projection (26) which engages behind the edge of the closure opening (38) of the other part (30) ,

Plastic glider according to one of the preceding claims, characterized in that the fastening means comprise at least one positioning element (22; 122; 222; 322) arranged in a defined position relative to the sliding surface (14; 1 14; 214; 314).

6. Plastic glides according to claim 5, characterized in that the positioning elements (22; 122; 222; 322) are designed as positioning pins. Plastic slider according to claim 4 or 5, characterized in that the positioning pins (22; 122; 222; 322) engage in correspondingly shaped positioning openings (40) of the other part (30).

Plastic glider according to one of the preceding claims, characterized in that on a part (10; 1 12; 212; 312) all projecting parts of the fastening means (16) are provided, which engage in openings (58) in lamellae (50) or frame parts are made of metal, and on the other part (30) corresponding openings (38, 40) for cooperation with the projecting parts (16, 20, 22) formed sin.

Plastic slider according to one of the preceding claims, characterized in that both parts (10, 30) of the plastic slider (12) each have at least one sliding surface (14, 34).

A slat for a variable-length protective cover, characterized by one or more plastic sliders (12, 100, 200, 300) intended to rest on a slideway, the slats having openings (60, 62) through which the fastening means (16 ) of the plastic slider (12; 100; 200; 300) protrude.

1 . Slat according to claim 10, characterized in that it has precisely fitting openings (62), which are adapted to the cross section of the positioning elements (22), as well as closure openings (60) through which the closure elements (20) can be passed.

2. Schutzbehang with one of a plurality of fins (50) according to claim 10 or 1 1, which are interconnected by flexible elements.