DE9401006U1 - Shoe wipers - Google Patents

Description

15 The invention relates to a shoe scraper according to the
Preamble of patent claim 1.

Shoe scrapers are usually installed in the entrance area of residential buildings, but especially in office buildings and public buildings. So-called rolling grates have proven to be particularly advantageous, as they - in contrast to
to rigid grates - relatively easy to handle and transport even for larger areas, as they can be rolled up.

In one embodiment of the known shoe scraper rolling grates, which is shown in the attached Figure 9,

·

scraper elements 10 in the form of rods with brush, fabric or rubber inserts are provided, which have holes 15. Furthermore, pipe sections are provided as spacers 27, which are threaded alternately with the scraper elements 10 on ropes that act as supports 26. The entire arrangement is braced at the ends. With this known shoe scraper rolling grate, the amount of work required to manufacture is considerable.

In another form of shoe scraper rolling grates, shown in the attached Figure 10, a retaining band 20 is provided, which has cast or riveted retaining pieces 21. The scraper elements 10 sit on these retaining pieces 21. With this known arrangement, it is almost inevitable that during use, i.e. when shoes are scraped off on the scraper elements 10, these will tip over due to the horizontal forces acting on them. This leads to one-sided wear on the scraper elements, and the feeling of walking on these shoe scraper rolling grates is "wobbly" unless an extremely high level of effort is made to create the retaining bands 20 in order to give them strength.

The invention is based on the object of developing a shoe scraper rolling grate of the type mentioned at the beginning in such a way that simple production with high stability is ensured. This object is achieved by the features specified in patent claim 1.

The essential point of the invention is that the mutual support of the stripping elements, i.e. the tipping of the stripping elements is prevented by pure shear forces. The necessary strength of the spacers is easy to achieve, since they only react to pressure and not to tension.

be charged.
35

Preferred embodiments of the invention emerge from the subclaims.

In a preferred embodiment of the invention, the holding pieces comprise snap connectors which can be snapped into lower openings of the scraper elements. The scraper elements are preferably designed as extruded profiles in which the lower opening is provided continuously over the entire length. The snap connectors can then be designed as simple hook elements, so that the production of the shoe scraper rolling grates is very simple.

The holding pieces are preferably designed and connected to the stripping elements in their lower area in such a way that their axes of rotation are lower when tilting than their stop surfaces, with which they touch the stripping elements when supporting. As a result, the stripping elements are coupled to one another in their lower area by the holding pieces or the retaining band via a tensile connection, and in their upper area by the spacers.
In this way, the
Scraper elements are held against rotation or tilting.

The spacers can be provided as individual elements and
connected to the stripping elements. The production
However, such a designed shoe scraper rolling grate is
relatively labor-intensive here.

The production becomes easier if the holding pieces
and/or the spacers are each fastened together on a band-shaped support. The fastening can be done by
Screwing or gluing or the like, although the holding pieces or spacers are preferably connected in one piece to the band-shaped carrier.

You can now provide holding pieces on one support and spacers on another support. Preferably, however, the holding pieces and spacers are arranged alternately on a common support or are manufactured as one piece with it. This makes assembling the shoe scraper rolling grates particularly easy.

The shoe scraper rolling grate according to the invention can be rolled up curved towards its back. In order to increase the ability to roll up or to achieve the smallest possible radius of curvature when rolling up, it is advantageous if the holding pieces and/or the spacers have devices that increase the bendability of the holding straps. When manufacturing the holding straps (if necessary together with the holding pieces and the spacers) from a synthetic resin, care is taken to ensure that the connection between the holding pieces and the spacers makes the actual support thick and thus rigid only in the shortest possible sections.

The retaining straps can be manufactured using injection molding or extrusion, whereby in the latter case the extruded profiles are cut into retaining straps of suitable width.

Preferred embodiments of the invention are explained in more detail below with reference to figures. Here:

Figure 1 is a perspective top view of retaining straps and spacers according to a first preferred embodiment of the invention,

Figure 2 a partial side view of the assembled shoe rack

streifer rolling grate using the retaining straps and spacers as per Figure 1, 30

Figure 3 is a side view of a second preferred embodiment of retaining straps,

Figure 4 is an enlarged view of section IV of Figure 3,

Figure 5 is a representation corresponding to Figure 2 using the retaining straps according to Figures 3 and 4,

Figure 6 is a perspective view of a retaining strap section according to another preferred embodiment of the invention, 5

Figure 7 is a representation similar to that shown in Figures 2

or 5 using a retaining strap according to Figure 6,

Figure 8 shows a retaining strap according to another preferred embodiment of the invention with a representation similar to that of Figure 4,

Figures 9 and 10 show two different known shoe scraper rolling grates in representations similar to those according to

Figures 2, 5 or 7.

In the following description, the same reference numbers are used for identical or equivalent parts. 20

A first embodiment of the invention is explained below with reference to Figures 1 and 2.

In this embodiment of the invention, holding pieces 21 are provided on a strip-shaped carrier 26, projecting upwards from its upper side 24, to form a holding band 20. The holding pieces 21 comprise flexible legs 22, 22' with teeth 23, 23' at their ends. The distance between the outer surfaces of the legs 22, 22' facing away from one another corresponds to the width of an opening 14 on the underside of stripping elements 10, which have a holding section 12 on their upper side for installing stripping inserts. The openings 14 are thus arranged in a clamping section 13 of the stripping element 10, the depth of the opening 14, which is defined by the clamping section 13, essentially corresponding to the height of the teeth 23, 23'. The dimensions are therefore selected in such a way that stripping elements can be pressed onto the holding pieces 21 from above, so that a

stable snap connection is formed. The underside 25 of the retaining straps can serve as a support surface for the rolling grate. In addition, (separate) supports 26' are provided, from the top 24' of which pin-shaped spacers 27 are attached, projecting upwards. The spacers 27 each have stop surfaces 28, 28', the distance between which corresponds to the distance between two adjacent stripping elements 10.

If the scraper elements 10 are now mounted on the retaining straps with spacers 27 in between on their supports 26', as shown in Figure 2, the scraper elements 10 are connected to one another on their undersides in a horizontal direction in a tension-resistant manner. Because the spacers 27 rest with their stop surfaces 28, 28' on two adjacent scraper elements 10 and the height of the spacers 27 essentially corresponds to the height of the scraper elements 10 (without their insert 11), the scraper elements 10 are connected to one another in a shear-resistant manner on their upper sides, i.e. approximately at the height of the inserts 11. Overall, the unit shown in Figure 2 thus forms a rigid system in the stretched state in which the scraper elements 10 cannot be tilted. The shoe scraper rolling grate assumes this position when laid out on the floor or inserted into a frame.

If you lift the shoe scraper rolling grate, it "loses" its stability and can therefore be rolled up with the inserts 11 facing outwards or the undersides 25, 25' of the supports 26, 26' facing inwards.

The embodiment of the invention shown in Figures 3-5 is even simpler in construction. In this case, only a single carrier 26 is provided, from whose top side 24 the holding pieces 21 and the spacers 27 are arranged alternately, projecting upwards. Otherwise, this embodiment corresponds to the one described above.

The further embodiment of the invention shown in Figures 6 and 7 differs from that according to Figures 3 to 5 in that the spacers 27 are narrower in the area in which they protrude from the upper side 24 of the carrier 26. In this area, notches 32, 32" are provided, which separate the spacers 27 from the support 26 except for relatively narrow bases 31. While in the embodiment according to Figures 3-4 the retaining band 20 is practically unbendable over the entire width of the spacers 27 (i.e. between their stop surfaces 28, 28'), in the embodiment according to Figures 6 and 7 this rigid area is determined only by the width of the bases 31. Since this base 31 only has to hold the spacers 27 in position and is otherwise not exposed to increased forces when using the shoe scraper rolling grate, the notches 32, 32' can be designed to be relatively deep and the base 31 relatively narrow.

A further increase in the flexibility of the shoe scraper rolling grate results from the embodiment of the invention shown in Figure 8.

In the previously described embodiments of the invention, the support 26 is essentially rigid in the area between the legs 22, 22' of the holding pieces 21, since the legs 22, 22' are supported in the openings 14 or on the holder sections 13 when the holding band 20 bends. In order to enable bending in this area as well, in the embodiment shown in Figure 8 the support section 26' lying between the legs 22, 22' is arranged offset upwards in relation to the rest of the support 26, in the direction of the teeth 23, 23'. This results in bending areas 33, 33' between the support section 26' and the support 26 adjacent to it, whereby the support section 26' is also bent when the shoe scraper rolling grate is rolled up. Overall, this makes rolling up even easier.

Of course, other designs of the retaining straps 20 or the carrier 23 are possible, which are based on the same principles. In particular, it is possible to provide additional bending sections in the form of film hinges or the like, whereby the carrier 23 (of course also the carrier 23') can be provided with wire, fiber or fabric inserts, which can then be designed to act as film hinges in such additional bending areas.

In the variant of the invention shown in Figure 8, the spacers 27 are also provided with a recess 30, which saves material. In the area of their upper sides 29, however, the spacers 27 are also solid here, so that they can withstand the shear load that occurs when the stripping elements 10 are tilted.

The shapes of the retaining straps 20 shown here can be manufactured using an injection molding process from elastic synthetic resin, for example from PVC. For reinforcement, it is possible to provide wire or textile inserts. It is also possible to manufacture the retaining straps 20 as extruded profiles, which are then cut into strips of suitable width. Manufacturing is therefore very simple.

In order to construct very long shoe scraper rolling grids with a large number of scraper elements 10, the scraper elements 10 can be placed on overlapping sections of retaining straps 20, so that the tensile stress from one retaining strap to the next retaining strap is transferred via at least one scraper element 10. The production of shoe scraper rolling grids with any format is thus possible using only a single retaining strap length format.

List of reference symbols

10 22' Scraper element 11 23' Scraper insert 12 Holding section 13 Clamping section 14 26' opening 15 drilling 20 28' Retaining strap 21 Holding piece 22, leg 23, Tooth 24 32' Top 25 33' bottom 26, carrier 27 Spacer 28, Stop surface 29 Top 30 Recess 31 base 32, score 33, Bending area

Claims (3)

1. Shoe scraper, comprising a plurality of elongated scraper elements (10) which are designed as profile rails open at the bottom, as well as retaining straps (20) with retaining pieces (21) on which the scraper elements (10) are fastened at a distance from one another, characterized, that spacers (27) are provided between two adjacent stripping elements (10) and are designed and attached in such a way that the stripping elements (10) are secured against tilting about their longitudinal axes by being supported against one another, that the holding pieces (21) comprise snap connectors (12, 13), which can be snapped into lower openings (14) of the stripping elements (10), wherein the holding pieces (21) and the spacers (27) are arranged alternately on a common band-shaped carrier (26) and are made in one piece from elastic synthetic resin, in particular injection-molded or extruded. 2. Shoe scraper according to claim 1, 10 characterized, that the holding pieces (21) are designed and connected to the stripping elements (10) in their lower regions in such a way that their stop surfaces (28, 28'), with which the spacers (27) touch the stripping elements (10) when supporting them, are located in the upper region of the stripping elements. 0 3. Shoe scraper according to one of the preceding claims, characterized, that the holding pieces (21) and/or the spacers (27) have devices (31, 32; 33) which increase the bendability of the retaining straps (20).