DE102008025784B4 - Plastic coated bristles for cleaning brushes - Google Patents

Abstract

The bristle (10) has a wire core made of metal such as steel, copper and brass, and formed as single wire. The wire core is galvanically formed. The wire core exhibits a round, oval, elliptical, rectangular or angular cross sectional profile. An outer lying casing is formed as a plastic casing or as a plastic coating on the wire core, where the plastic is resistant against chemicals. A non-linearly running outer contour extends in different planes (28-34) transverse to an axial direction of the bristle. An independent claim is also included for a cleaning brush comprising bristles.

Description

The The invention relates to a bristle of a trained for cleaning purposes Brush, wherein the bristle comprises a wire core of metal and an outer one wrapping and a cleaning brush.

State of the art

Brushes for cleaning purposes exist in various designs. So are for the street cleaning Sweeping brush rollers known, which have a shaft on which a plurality of bristle carriers in batches are attached side by side, so that a total of a sweeping brush with a cylinder geometry results. Brush rollers can, for example a plurality of individual juxtaposed in the axial direction Brush discs with having radially extending bristles.

Further are so-called plate brush systems in use, in which a disc-like trained brush holder in one Plane parallel or rotated at a certain angle to the cleaning surface, being on the brush holder obliquely to the axis of rotation aligned bristles are arranged.

at Machine cleaning of paved or sealed surfaces, such as about roads, sidewalks, but also of landing and runways at airports, come mainly brush systems with metal wire bristles used. Such brush systems set by the mechanical properties of the metal bristles used one for the removal of dirt, ice and snow optimized cleaning effect to disposal.

Although good cleaning results through the use of metal wire bristles can be achieved However, they have the disadvantage of a possible wire break, so that single from the brush Broken bristle elements remain on the surface actually to be cleaned. Especially in the removal of ice and snow, such as on start or Runways of airports, there are also solvents Tausalze and the like means are used alone, but also in combination with water to a considerable corrosion can lead the metal wire bristles.

Such at least partially corroded metal wire bristles tend to increase with increasing Corrosion to bristle break, so during the cleaning process individual bristle pieces relatively easy break off and remain on the surface to be cleaned. This is special when cleaning startup and Airstrips from airports to classify as particularly critical, since located on the runway Metal parts a significant security risk for aircraft and their inmates can represent.

moreover The corrosion of the metal wire bristles reduces the life span the brush. It also has a detrimental effect on the cleaning effect to be achieved out. Further leads the corrosion of the metal wire bristles to disadvantageous for cleaning purposes mechanical cleaning properties of the brush.

A bristle with the features mentioned is for example from the DE 32 03 867 C2 known. This document discloses a bristle with a wire core, wherein the bristle has an outer casing made of plastic. However, this document discloses only the sheathing of two strands with a common plastic sheath.

From the CH 182 003 A a metal bristle is known which is coated with a sheath of rubber or a rubbery mass.

The DE 199 31 993 A1 discloses a plastic bristle having an extruded sheath. The core of the bristle may be supplied in corrugated, compressed or bundled form to the extruding device.

task

Of the The present invention is therefore based on the object, a metal wire bristle as well as a cleaning brush to disposal to provide, which is less susceptible to corrosion and also under adverse conditions has an extended life. Also the invention is intended to provide a metal wire bristle, the less severe bristle fractures inclines.

Invention and advantageous effects

The The problem underlying the invention is provided with a bristle according to claim 1 and a cleaning brush according to claim 14 solved. Advantageous embodiments of the invention are specified in the subclaims.

The bristle according to the invention is intended for a brush designed for cleaning purposes. The bristle has a wire core made of metal and a surrounding the wire core plastic sheath. The outer and the metal wire core surrounding plastic cover provides a corrosion protection for the wire core available. This will get used in the context of a cleaning process and corrosion on the metal wire core chemicals, acids and salts are not or only insignificantly in direct contact with the wire core of the bristle, so that it can be effectively protected by the plastic coating from corrosive influences. The plastic sheath is designed such that it is in direct contact with the outer sides of the metal wire core. This causes between the wire core of metal and the outer plastic sheath no gaps arise in which any corrosive substances can accumulate. The design of the plastic sheath is further selected such that it influences the mechanical properties, in particular the bending behavior of the wire bristle, at most in a negligible manner. Consequently, the plastic sheath has a barely noticeable effect on the cleaning effect of a brush equipped with bristles invention cleaning brush. It is envisaged to form the wire core of the bristle as a single wire. Each bristle according to the invention consists so to speak of a single metal wire, which is provided in each case with a plastic sheath.

Of Further, the surrounding the wire core plastic sheath as Plastic coating or designed as a plastic coating.

The Wavy profile is corrugated regularly or irregularly and can move in different planes transversal to the axial direction the bristle extend. This means, the amplitude of the corrugated profile can be in any direction extend perpendicular to the axial direction of the bristle.

Of the Wire core of the bristle can be used as steel wire and / or copper wire and / or Brass wire be formed. The choice of material is preferably made dependent on the intended use of the brush equipped with the bristles.

Farther can be provided that the wire core is formed galvanized. For example, a galvanized steel wire core has increased corrosion resistance per se on. If one provides such a galvanized steel wire core with a further plastic casing according to the invention, see above can the corrosion resistance across from corrosive chemicals and substances noticeably and in a simple way and way increased become.

Farther is provided according to an embodiment that the geometry of Wire core can be configured almost arbitrarily. As part of the design are in particular round, oval, elliptical, angular, in particular rectangular and square, but also pentagonal and hexagonal as well octagonal cross-sectional profiles of the wire core. Also can be provided be to form the wire core as a so-called flat wire, the has a substantially rectangular cross-sectional profile, wherein the difference in length between the short and the long side of the rectangle a ratio of 1: 2 can take up to 1: 5.

To a further advantageous embodiment of the invention the wire core has a diameter of 0.2 mm to 1.1 mm, preferably a diameter of 0.3 mm to 0.8 mm, most preferably a diameter from 0.4 to 0.6 mm. The diameter of the bristle according to the invention or the diameter of the wire core is preferably less than 1 mm. In a particularly preferred embodiment, the diameter is of the wire core about 0.45 to 0.5 mm.

This Plastic coating has a thickness of less than 20%, preferably less than 10% and most preferably less than 5% of the diameter of the wire core.

at a standard within the scope of the advantageous embodiment diameter of the wire core of about 0.5 mm the layer thickness of the plastic coating or the thickness of the plastic coating thus maximum 0.02 mm, 0.05 mm or 0.1 mm. Not least due these thickness ratios of wire core and plastic coating has the plastic coating or the plastic coating has a barely noticeable effect on the mechanical properties of the bristle and the cleaning performance of a equipped with it Cleaning brush.

To a further advantageous embodiment of the invention is the Plastic covering essentially transparent, so that the plastic coating optically barely perceptible by a user.

Besides can the plastic wrap also have different colors, which is an easy and intuitive Marking brush type, Borstendicke and material allows.

Farther is provided that the plastic casing or the plastic coating the wire core in the radial direction whose entire extent in the axial direction substantially completely encloses. By this full-scale Coating or coating of the wire core with a corrosion resistant plastic can a improved, cheaper and long-lasting corrosion protection can be provided.

According to a development, it is provided that the bristle according to the invention is substantially rectilinear. In this case, bristles or bristle tufts arranged adjacent to one another have a substantially equal axial extent. Alternatively it can be provided, the Län ge adjacent bristles or adjacent bristle tufts to make different to optimally adapt the brush to the intended use can.

To a development of the invention, the outer contour of the bristle a corrugated Profile with a wavelength in the range of 5 mm to 15 mm, preferably about 10 mm.

To a further advantageous embodiment of the invention is the for the wrapping or coating provided plastic at least against chemicals resistant to formate and acetate. That is, the intended for coating Plastic is intended to protect against formic and acetic acid and their salts and esters at least for the period of an intended minimum life of the brush essentially be resistant.

When Material for the plastic wrap or plastic coating are especially thermoplastic Plastics such as polyethylene, polyamide, polymethylmethacrylate, polypropylene and / or polyvinyl chloride in question. Also, synthetic rubber can be used as Plastic coating eligible.

To an independent one Aspect, the invention further relates to a cleaning brush, which be designed as a broom, disc brush, as a cassette brush or brush disc can and which has at least one bristle carrier to which individual each individually provided with a plastic sheath metal wire bristles are arranged. The bristles can each individually or grouped in so-called bristle tufts on bristle carrier be attached.

embodiments

Further Objectives, features and advantageous applications of the invention are in the following description of exemplary embodiments. All form described and illustrated features the subject the present invention; also independent of the claims and their remittances.

It demonstrate:

1 a schematic representation of a radially symmetrical bristle according to the invention in cross section,

2 a representation of the bristle seen in the axial direction,

3 an enlarged view of the bristle according to 2 .

4 a schematic side view of a wavy bristle and

5 another corrugated embodiment of a bristle.

In the 1 Bristle shown in cross-section 10 has a cross-sectionally radially symmetrical wire core 14 and an outer, the wire core 14 enveloping serving 12 on. The plastic layer or sheath 12 lies particularly close and immediately adjacent to the outside of the wire core 14 on, so between wrapping 12 and wire core 14 no or no appreciable gap is formed, in which any corrosive to the wire core 14 can accumulate acting substances and chemicals.

As in the 4 and 5 shown, the bristle can 10 have an irregular wavy outer contour, with individual sections with reference numerals for ease of illustration 28 . 30 . 32 . 34 Marked are.

In the 2 and 3 is the plastic coated corrugated bristle 10 shown in the axial direction. The individual shaft sections spaced apart in the axial direction 28 . 30 . 32 . 34 extend in different directions transversely to the longitudinal extent or axial direction of the bristle 10 , Also, the amplitude of the individual waves can be significantly different from each other. In the illustration according to 2 is every shaft section 28 . 30 . 32 . 34 with a relatively small amplitude yet another axially spaced shaft section 20 . 22 . 24 . 26 associated with a larger amplitude, which in each case in the same, but mutually different transverse directions, based on the axial direction of the bristle 10 extend.

In 3 is merely an enlarged view in 2 shown with A marked inside area. There you can clearly see that the wire core 14 with a serving 12 is provided.

Complementary and alternative to in 1 shown cross-sectional profile are of course also rectangular or square, optionally provided with rounded edges cross-sectional profiles as well as oval and elliptical cross-sectional profiles in the context of the present invention. Also suitable are pentagonal, hexagonal or octagonal cross-sectional geometries, possibly with respective sharp and / or rounded edges.

The wire core 14 is in particular designed as a single wire and has a diameter in the range of 0.2 to 1.1 mm. In preferred Embodiments is the diameter of the wire core 14 about 0.5 mm, the thickness of the sheath 12 about 5% to 10% of the diameter of the wire core 14 is. Typical layer thicknesses are therefore in the range of 0.02 to 0.05 mm.

10

bristle

12

wrapping

14

wire core

20

shaft section

22

shaft section

24

shaft section

26

shaft section

28

shaft section

30

shaft section

32

shaft section

34

shaft section

50

bristle

Claims (14)

Bristle of a cleaning brush, the bristle comprising a wire core ( 14 ) made of metal and an outer casing ( 12 ), characterized in that the wire core ( 14 ) is formed as a single wire, the envelope ( 12 ) is formed as a plastic coating or as a plastic coating, wherein the bristle ( 10 ) has an irregularly waved outer contour which extends in different planes transversely to the axial direction of the bristle. Bristle according to claim 1, characterized in that the wire core ( 14 ) Steel and / or copper and / or brass. Bristle according to one of the preceding claims, characterized in that the wire core ( 14 ) is formed galvanized. Bristle according to one of the preceding claims, characterized in that the wire core ( 14 ) has a round, oval, elliptical or polygonal cross-sectional profile. Bristle according to claim 4, characterized in that the wire core ( 14 ) has a rectangular cross-sectional profile. Bristle according to one of the preceding claims, characterized in that the wire core ( 14 ) has a diameter of 0.2 mm to 1.1 mm, preferably a diameter of 0.3 mm to 0.8 mm, most preferably a diameter of 0.4 mm to 0.6 mm. Bristle according to one of the preceding claims, characterized in that the covering has a thickness of less than 20%, preferably less than 10%, most preferably less than 5% of the diameter of the wire core ( 14 ) having. Bristle according to one of the preceding claims, characterized in that the envelope ( 12 ) is formed substantially transparent. Bristle according to one of the preceding claims, characterized in that the envelope ( 12 ) the wire core ( 14 ) in the radial direction over its entire extent in the axial direction almost completely encloses. Bristle according to one of the preceding claims, characterized characterized in that the outer contour the bristle has a corrugated profile with a wavelength in the range 5 to 15 mm. Bristle according to claim 10, characterized that the wavelength about 10 mm. Bristle according to one of the preceding claims, wherein the plastic at least against chemicals based on formate and acetate is resistant. Bristle according to one of the preceding claims, wherein as plastic for the covering ( 12 ) Polyethylene (PE), polyamide (PA), polymethyl methacrylate (PMMA), polypropylene (PP) and / or polyvinyl chloride (PVC) are provided. Cleaning brush with at least one bristle carrier on which a bristle tufts with a plurality of bristles ( 10 ; 50 ) is arranged according to one of the preceding claims.