EP2911540B1 - Protective screen and visor produced therewith for a safety helmet, particularly a forestry worker's helmet - Google Patents

Protective screen and visor produced therewith for a safety helmet, particularly a forestry worker's helmet Download PDF

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Publication number
EP2911540B1
EP2911540B1 EP13780336.7A EP13780336A EP2911540B1 EP 2911540 B1 EP2911540 B1 EP 2911540B1 EP 13780336 A EP13780336 A EP 13780336A EP 2911540 B1 EP2911540 B1 EP 2911540B1
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EP
European Patent Office
Prior art keywords
openings
mesh
visor
grid
rim
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EP13780336.7A
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German (de)
French (fr)
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EP2911540A1 (en
Inventor
Anton Pfanner
Martin Greber
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Pfanner Schutzbekleidung GmbH
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Pfanner Schutzbekleidung GmbH
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Publication of EP2911540A1 publication Critical patent/EP2911540A1/en
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    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/18—Face protection devices
    • A42B3/22—Visors
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A41D13/1184—Protective face masks, e.g. for surgical use, or for use in foul atmospheres with protection for the eyes, e.g. using shield or visor
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/18—Face protection devices
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/18—Face protection devices
    • A42B3/22—Visors
    • A42B3/225—Visors with full face protection, e.g. for industrial safety applications

Definitions

  • the invention relates to a visor for a protective helmet, in particular a forestry helmet, with a protective screen for the face and especially the eyes of a person from flying particles and sharp objects, especially in forestry work, with a grid with a grid structure consisting of a variety of mutually adjacent rows of non-circular openings is formed, which are bounded by the openings common lattice webs, wherein the openings, except for directly adjacent to a lattice-free edge of the lattice part openings, each having substantially the same area, and wherein the edge enclosing the grid and along its circumference has a width which is at least equal to a height of one row of openings of the lattice structure.
  • a protective screen for such a visor is from the document EP 1 182 943 B1 known. It is made by etching metal and includes a grid which forms a large number of translucent apertures, the apertures including different areas.
  • the protective screen has at least two areas. The area of each opening within each area is the same, and the areas of the openings in different areas are different.
  • the grid is enclosed by a continuous edge whose width corresponds approximately to the thickness of one of the grid bars between adjacent openings of the grid. Such an edge should not make a significant contribution to the stability of the grid.
  • the protective screen when overmoulded with a plastic supporting frame surrounding the grid, irregular transitions between the inner boundary of the supporting frame and the grid result because the plastic irregularly spreads in some openings of the grid and not in other openings.
  • the grid of the known face shield in the different areas each have a different stability and strength, because these are determined by the size of the openings of the grid, which is different in the different areas, and the other by the thickness of the grid webs is also different in the different areas.
  • the of Area to area different size of the surfaces entails that the grid also has a different light transmittance from area to area.
  • a visor comprises an (outer) frame, an inner frame member and a grid, wherein all elements are integrally molded from plastic.
  • a screen for protecting the human eye from excessive sunlight which replaces the usual colored glasses in sunglasses.
  • the screen consists of a circular plate which is trimmed so that it can be inserted into the lens opening of a spectacle frame.
  • the screen comprises a plurality of mutually adjacent rows of circular, ie circular openings of the same diameter or rows of circular openings with two different diameters.
  • the object of the invention is to improve the stability of the grid in a visor of the type mentioned and to increase the quality of the appearance of a grid-supporting frame.
  • the large width of the edge of the shield of the visor according to the invention contributes to increasing the stability of the grid.
  • the wide edge also allows to provide the protective screen of the visor according to the invention with a support frame with a uniform inner boundary.
  • the encapsulation of the lattice-structure-free Edge makes this advantage of the visor according to the invention with regard to the otherwise irregular boundary in the extrusion coating of a grid structure to be effective.
  • the width of the edge is at least equal to the height of two vertically adjacent rows of openings of the lattice structure. This design gives the visor according to the invention, the desired greater stability on the basis of the minimum width of the edge used in this embodiment.
  • the edge is provided with through holes distributed over its length, which are predominantly each smaller than each of the grid openings.
  • These through holes are a few through holes of larger diameter, which facilitate as pass holes the insertion of the protective screen in a processing machine in which the protective screen is coated in its entirety with a protective layer or in which the protective shield is coated with the support frame, and order significantly more through holes of smaller diameter through which the plastic can pass in the manufacture of the support frame to improve the connection between the grid and the support frame.
  • the minimum number of openings in the grid per square centimeter is at least 15.
  • the number of openings per square centimeter is selected according to the protection requirements. If z. B. is known that softwood chips will be incurred in forestry work, a coarser grid can be selected. On the other hand, a finer grid should be chosen for the accumulation of hardwood chips. Rough in the present context means z. B. 16 openings / cm 2 , however, fine z. B. 39 openings / cm 2 .
  • the thickness of the grid bars is chosen inversely proportional to the number of openings per square centimeter.
  • the thickness of the grid bars can be about 0.3 mm, whereas in the case of the fine grid with 39 openings / cm 2 about 0.2 mm.
  • the associated height of one row of openings of the lattice structure may be about 3 mm or about 2 mm in the two aforementioned examples, and this value then also the minimum width according to the invention would be from one row of openings of the lattice structure.
  • the grid bars are formed thicker in a zone adjacent to the edge at its periphery whose width is at least equal to the vertical height of one of the rows, as the grid webs of the remaining openings. This makes it possible to achieve a further increase in the already high and in itself sufficient stability of the visor according to the invention.
  • the width of the zone is substantially equal to the height of two vertically adjacent rows of openings of the lattice structure.
  • the zone thus has in total compared to the grid a small width, but still significantly increases the strength and stability of the grid due to the thicker formed within the grid bars.
  • the transmittance within the zone is substantially equal to the transmittance of the grating outside the zone because the areas of the openings surrounded by thicker lands are substantially equal to those of the openings surrounded by thinner grid bars.
  • the openings in the zone have the same vertical center distance as the openings in the remaining grid.
  • the achieved additional rigidity of the grid does not affect the light transmission, in particular not the so-called through-view, because the zone is at the edge of the grid and because, moreover, all the openings of the grid outside and within the zone are arranged in the same grid.
  • the grid is made of spring steel sheet.
  • a thin sheet can be used to achieve the desired stability with the least weight of the protective screen, and in particular to ensure protection against high-speed particles.
  • the grid is produced by etching. Etching is the preferred method of production when metal is used for the grid of the protective screen.
  • face shields can also be made with a woven metal wire or plastic mesh, such meshes have various disadvantages for the wearer that etched metal mesh does not have. Such Disadvantages exist z. Example, in that the wires occupy a large part of the total area of the grid and give a lower stability and mechanical strength than an etched metal mesh.
  • such woven wire or plastic mesh can be penetrated by pointed objects such as sharp branches or branches, because wires or plastic threads are displaced relative to each other.
  • an inner edge of the support frame facing the grille is at a distance from an inner circumference of the edge adjoining the grille.
  • Fig. 1 shows in plan view a generally designated 10 first embodiment of a protective shield 10 of an otherwise not shown visor according to the invention with a grid 12 made of a thin spring steel sheet.
  • a support frame 52 of the visor is in Fig. 4 indicated.
  • Fig. 1a shows a detail of the protective screen 10 after Fig. 1 on a larger scale.
  • the grid 12 has a grid structure formed of a plurality of mutually adjacent rows of non-circular openings 14. As shown in Fig. 1a the openings are each hexagonal and bounded by common lattice webs 16, which have a thickness D.
  • the openings 14 of the grid 12 each have the same surface area, apart from to a circumferential, lattice-structure-free edge 18 immediately adjacent partial openings 13, but which are negligible overall. Further, due to this structure, each two adjacent rows of openings 14 of the grid have one and the same vertical center distance M.
  • the grid 12 is enclosed by the rim 18, which has a width B that is at least equal to a height H of one row of apertures 14 of the grid structure.
  • the width of the rim 10 is at least equal to the height of two vertically adjacent rows of apertures 14 of the grid structure.
  • the rim 18 is provided with through-holes 15, 17 distributed over its length, which are predominantly each substantially smaller than each of the openings 14 of the grid 12.
  • these through holes are through holes 15 of larger diameter and mainly around through holes 17 of smaller diameter.
  • Each through hole 15 has substantially the same area as one of the openings 14 of the lattice structure.
  • the larger diameter through holes 15 are fitting holes facilitating the insertion of the shield 10 into a processing machine in which the shield is coated in its entirety with a protective layer and / or in which the shield is provided with a support frame (shown in Figs Fig. 1 and 1a not shown) is overmoulded.
  • the through holes 17 of smaller diameter, of which much more than from the through holes 15 of larger diameter present are, let the plastic in the molding of in Fig. 4 indicated support frame 52 pass to improve the connection between the grid 12 and the support frame 52.
  • Fig. 2 shows a generally designated 20 second embodiment of a shield of the visor according to the invention with a grid 22 made of spring steel sheet having openings 24 which are smaller than the openings 14, and has a finer grid structure than the grid 12 of the first embodiment.
  • the minimum number of openings 14, 24 in the grid 12 or 22 per square centimeter is at least 15 according to DIN EN 1731.
  • the actually used number of openings in the grid is selected according to the protection requirements, that is, whether, for example, to ensure protection against flying particles which are softwood chips or hardwood chips.
  • the grid 22 has grid bars 26 having a thickness D that is inversely proportional to the number of openings per square centimeter.
  • the grid 12 is a coarser grid with sixteen openings 14 per square centimeter.
  • the grid 22 is a finer grid having thirty-nine openings 24 per square centimeter.
  • the details that are in the Fig. 1a and 2 can be seen that the thickness D of the grid bars 16 in the coarser grid 12 is greater than the thickness D in the finer grid 22.
  • the details in the Fig. 1a and 2a are shown at the same magnification, so it can be seen immediately that the coarser grid 22 has substantially fewer rows and openings 14 than the finer grid has 22 rows of openings 24.
  • the openings 24 of the grid 22 all have the same area. The same applies to the openings 14 of the grid 12, but the grid 22 has the same surface area as the grid 12 substantially more openings 24, as the grid 12 has openings 14.
  • FIG. 3 shows a generally designated 30 third embodiment of the shield of the visor according to the invention, which corresponds to the protective shield 10 according to the first embodiment, but has a different lattice structure in the edge region.
  • FIG. 3a shows as a detail the edge region of the protective screen 30 after FIG. 3 on a larger scale. Same parts as in the FIGS. 1 and 2 are in the Figures 3 and 4 provided with the same reference numerals and need not be described again.
  • Fig. 3 and 4 have lattice webs 36a and 46a of in one of the edge 38 and 48 adjacent zone 70 (in Fig. With dashed boundary shown openings) 34a and 44a has a greater thickness D than lattice webs 36b and 46b of the remaining openings 34 and 44. In this case, have openings 34 and 34a and 44 and 44a in adjacent lines outside or within the zone 70, the same vertical Center distance M as the openings in the remaining adjacent rows of the grid 32 and 42nd
  • the zone 70 has a width BZ which is at least equal to the vertical height H of one of the lines.
  • the width BZ of the zone 70 is substantially equal to the height of two vertically adjacent rows of openings 34 and 44, respectively, of the grid structure.
  • the thicker webs of the apertures 44a are achieved by a somewhat modified hexagonal shape within the apertures 44a opposite the hexagonal shape within the apertures 44. In the corners of the hexagon of the openings 44a, these are rounded off, in contrast to the corners of the hexagon of the openings 44, which have no radius of curvature. In this way, with the same grid, thicker webs 46a of the openings 44a than the webs 46b of the openings 44 are achieved, with essentially the same surface area of the openings 44a and 44th
  • the protective screens 10, 20 and 30 can be provided, like the protective screen 40, with a zone 70 in which the grid bars are thicker than in the remaining part of the grid 12, 22 and 32, respectively.
  • the grid 12, 22, 32 and 42 is made of spring steel sheet, by etching. After a photolithographic or the like. Process, the lattice structure is applied with a protective lacquer on the metal sheet. At all locations not covered by paint, the grid is etched away so as to produce the desired grid structure with the wide rim 18, 28, 38 and 48 surrounding it.
  • the protective screen 10, 20, 30 and 40 is encapsulated with a support frame made of plastic and is thus as a visor for a protective helmet, in particular a forestry helmet, used. It has according to the in Fig. 4 an illustration shown an inner, the grid 42 facing boundary 50 of the indicated support frame 52 a distance A from an inner, adjoining the grid 42 circumference 54 of the edge 48th Thus the support frame 52 does not come into contact with the actual grid 42 and has a uniform inner boundary after its manufacture.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Helmets And Other Head Coverings (AREA)

Description

Die Erfindung betrifft ein Visier für einen Schutzhelm, ins besondere einen Forstarbeiterhelm, mit einem Schutzschirm für das Gesicht und vor allem die Augen einer Person vor fliegenden Teilchen und spitzen Gegenständen, insbesondere bei Forstarbeiten, mit einem Gitter mit einer Gitterstruktur, die aus einer Vielzahl von gegenseitig benachbarten Zeilen von unrunden Öffnungen gebildet ist, welche durch den Öffnungen gemeinsame Gitterstege begrenzt sind, wobei die Öffnungen, abgesehen von unmittelbar an einen gitterstrukturfreien Rand des Gitters angrenzenden Teilöffnungen, jeweils im Wesentlichen den gleichen Flächeninhalt haben, und wobei der Rand das Gitter umschließt und längs seines Umfangs eine Breite hat, die wenigstens gleich einer Höhe von einer Zeile von Öffnungen der Gitterstruktur ist.The invention relates to a visor for a protective helmet, in particular a forestry helmet, with a protective screen for the face and especially the eyes of a person from flying particles and sharp objects, especially in forestry work, with a grid with a grid structure consisting of a variety of mutually adjacent rows of non-circular openings is formed, which are bounded by the openings common lattice webs, wherein the openings, except for directly adjacent to a lattice-free edge of the lattice part openings, each having substantially the same area, and wherein the edge enclosing the grid and along its circumference has a width which is at least equal to a height of one row of openings of the lattice structure.

Ein Schutzschirm für ein derartiges Visier ist aus dem Dokument EP 1 182 943 B1 bekannt. Er ist durch Ätzen von Metall hergestellt und umfasst ein Gitter, welches eine große Anzahl von lichtdurchlässigen Öffnungen bildet, wobei die Öffnungen unterschiedliche Flächen beinhalten. Der Schutzschirm weist mindestens zwei Bereiche auf. Die Fläche jeder Öffnung innerhalb jedes Bereiches ist gleich, und die Flächen der Öffnungen in verschiedenen Bereichen sind unterschiedlich. Das Gitter ist von einem durchgehenden Rand umschlossen, dessen Breite etwa der Dicke von einem der Gitterstege zwischen benachbarten Öffnungen des Gitters entspricht. Ein solcher Rand dürfte keinen wesentlichen Beitrag zur Stabilität des Gitters leisten. Wenn der Schutzschirm mit einem das Gitter umschließenden Tragrahmen aus Kunststoff umspritzt wird, ergeben sich darüber hinaus unregelmäßige Übergänge zwischen der inneren Berandung des Tragrahmens und dem Gitter, weil der Kunststoff sich unregelmäßig in einige Öffnungen des Gitters hinein ausbreitet und in andere Öffnungen nicht. Ferner hat das Gitter des bekannten Gesichtsschutzschirms in den verschiedenen Bereichen jeweils eine andere Stabilität und Festigkeit, weil diese zum einen durch die Größe der Öffnungen des Gitters bestimmt werden, die in den verschiedenen Bereichen unterschiedlich ist, und zum anderen durch die Dicke der Gitterstege, die in den verschiedenen Bereichen ebenfalls unterschiedlich ist. Die von Bereich zu Bereich unterschiedliche Größe der Flächen bringt es mit sich, dass das Gitter auch von Bereich zu Bereich einen anderen Lichttransmissionsgrad hat.A protective screen for such a visor is from the document EP 1 182 943 B1 known. It is made by etching metal and includes a grid which forms a large number of translucent apertures, the apertures including different areas. The protective screen has at least two areas. The area of each opening within each area is the same, and the areas of the openings in different areas are different. The grid is enclosed by a continuous edge whose width corresponds approximately to the thickness of one of the grid bars between adjacent openings of the grid. Such an edge should not make a significant contribution to the stability of the grid. Moreover, when the protective screen is overmoulded with a plastic supporting frame surrounding the grid, irregular transitions between the inner boundary of the supporting frame and the grid result because the plastic irregularly spreads in some openings of the grid and not in other openings. Furthermore, the grid of the known face shield in the different areas each have a different stability and strength, because these are determined by the size of the openings of the grid, which is different in the different areas, and the other by the thickness of the grid webs is also different in the different areas. The of Area to area different size of the surfaces entails that the grid also has a different light transmittance from area to area.

Aus dem gattungsbildenden Dokument EP 0 689 812 A2 ist eine Schutzeinrichtung für Waldarbeiter oder dergleichen bekannt, bei der ein Visier einen (äußeren) Rahmen, ein inneres Rahmenteil und ein Gitter umfasst, wobei sämtliche Elemente einstückig aus Kunststoff gespritzt sind.From the generic document EP 0 689 812 A2 is a protective device for forestry workers or the like is known in which a visor comprises an (outer) frame, an inner frame member and a grid, wherein all elements are integrally molded from plastic.

Aus dem Dokument FR-A-826 990 ist ein Schirm zum Schutz des menschlichen Auges vor exzessivem Sonnenlicht bekannt, der bei einer Sonnenbrille die üblichen gefärbten Gläser ersetzt. Der Schirm besteht aus einer kreisförmigen Platte, die so zugerichtet wird, dass sie in die Brillenglasöffnung eines Brillengestells einsetzbar ist. Der Schirm umfasst eine Vielzahl von gegenseitig benachbarten Zeilen von runden, also kreisförmigen Öffnungen gleichen Durchmessers oder Zeilen von kreisförmigen Öffnungen mit zwei unterschiedlichen Durchmessern. Probleme hinsichtlich der Stabilität und der Qualität des Aussehens dürfte es bei dem bekannten Schirm nicht geben, da der Schirm insgesamt nur einen Durchmesser hat, der im Ausgangszustand des Schirms nicht viel größer als die Brillenglasöffnung eines Brillengestells ist, in welcher er an seinem gesamten Umfang erfasst wird. Schutzschirme, wie sie bei einem Visier eines Schutzhelms eingesetzt werden, sind um ein Vielfaches größer und daher mit einem Schutzschirm von Brillenglasgröße, zumindest hinsichtlich der Stabilität, nicht vergleichbar.From the document FR-A-826990 a screen for protecting the human eye from excessive sunlight is known, which replaces the usual colored glasses in sunglasses. The screen consists of a circular plate which is trimmed so that it can be inserted into the lens opening of a spectacle frame. The screen comprises a plurality of mutually adjacent rows of circular, ie circular openings of the same diameter or rows of circular openings with two different diameters. Problems with respect to the stability and the quality of the appearance should not exist in the known screen, since the screen as a whole has only a diameter which, in the initial state of the screen, is not much larger than the spectacle lens opening of a spectacle frame in which it covers its entire circumference becomes. Protective screens, such as those used in a visor of a protective helmet, are many times larger and therefore not comparable with a protective screen of spectacle lens size, at least in terms of stability.

Aufgabe der Erfindung ist es, bei einem Visier der eingangs genannten Art die Stabilität des Gitters zu verbessern und die Qualität des Aussehens eines das Gitter tragenden Rahmens zu steigern.The object of the invention is to improve the stability of the grid in a visor of the type mentioned and to increase the quality of the appearance of a grid-supporting frame.

Diese Aufgabe ist ausgehend von einem Visier der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass der Rand des Schutzschirms mit einem Tragrahmen aus Kunststoff umspritzt ist.This object is achieved on the basis of a visor of the type mentioned in the present invention that the edge of the protective screen is encapsulated with a support frame made of plastic.

Das ergibt die gewünschte erhöhte Stabilität und das angestrebte bessere Aussehen. Auch die große Breite des Randes des Schutzschirms des Visiers nach der Erfindung trägt zur Erhöhung der Stabilität des Gitters bei. Der breite Rand erlaubt überdies, den Schutzschirm des Visiers nach der Erfindung mit einem Tragrahmen mit einer gleichmäßig verlaufenden inneren Berandung zu versehen. Die Umspritzung des gitterstrukturfreien Randes lässt diesen Vorteil des Visiers nach der Erfindung hinsichtlich der ansonsten unregelmäßigen Berandung bei der Umspritzung einer Gitterstruktur wirksam werden.This results in the desired increased stability and the desired better appearance. Also, the large width of the edge of the shield of the visor according to the invention contributes to increasing the stability of the grid. The wide edge also allows to provide the protective screen of the visor according to the invention with a support frame with a uniform inner boundary. The encapsulation of the lattice-structure-free Edge makes this advantage of the visor according to the invention with regard to the otherwise irregular boundary in the extrusion coating of a grid structure to be effective.

Vorteilhafte Ausgestaltungen des Visiers nach der Erfindung bilden die Gegenstände der abhängigen Ansprüche.Advantageous embodiments of the visor according to the invention form the subject of the dependent claims.

In einer Ausgestaltung des Visiers nach der Erfindung ist die Breite des Randes wenigstens gleich der Höhe von zwei vertikal benachbarten Zeilen von Öffnungen der Gitterstruktur. Diese Ausbildung verleiht dem Visier nach der Erfindung die angestrebte größere Stabilität auf der Basis der in dieser Ausgestaltung verwendeten Mindestbreite des Randes.In one embodiment of the visor according to the invention, the width of the edge is at least equal to the height of two vertically adjacent rows of openings of the lattice structure. This design gives the visor according to the invention, the desired greater stability on the basis of the minimum width of the edge used in this embodiment.

In einer weiteren Ausgestaltung des Visiers nach der Erfindung ist der Rand mit über seine Länge verteilten Durchgangslöchern versehen, die überwiegend jeweils kleiner als jede der Gitteröffnungen sind. Bei diesen Durchgangslöchern handelt es sich um einige wenige Durchgangslöcher größeren Durchmessers, welche als Passlöcher das Einsetzen des Schutzschirms in eine Bearbeitungsmaschine erleichtern, in der der Schutzschirm in seiner Gesamtheit mit einer Schutzschicht beschichtet wird oder in der der Schutzschirm mit dem Tragrahmen umspritzt wird, und um wesentlich mehr Durchgangslöcher kleineren Durchmessers, durch die der Kunststoff bei der Herstellung des Tragrahmens hindurchtreten kann, um die Verbindung zwischen Gitter und Tragrahmen zu verbessern.In a further embodiment of the visor according to the invention, the edge is provided with through holes distributed over its length, which are predominantly each smaller than each of the grid openings. These through holes are a few through holes of larger diameter, which facilitate as pass holes the insertion of the protective screen in a processing machine in which the protective screen is coated in its entirety with a protective layer or in which the protective shield is coated with the support frame, and order significantly more through holes of smaller diameter through which the plastic can pass in the manufacture of the support frame to improve the connection between the grid and the support frame.

In einer weiteren Ausgestaltung des Visiers nach der Erfindung beträgt die Mindestzahl der Öffnungen im Gitter je Quadratzentimeter mindestens 15. Die Anzahl der Öffnungen je Quadratzentimeter wird dabei nach den Schutzanforderungen ausgewählt. Wenn z. B. bekannt ist, dass bei Forstarbeiten Weichholzspäne anfallen werden, kann ein groberes Gitter gewählt werden. Hingegen sollte bei dem Anfall von Hartholzspänen ein feineres Gitter gewählt werden. Grob bedeutet im vorliegenden Zusammenhang z. B. 16 Öffnungen/cm2, dagegen fein z. B. 39 Öffnungen/cm2.In a further embodiment of the visor according to the invention, the minimum number of openings in the grid per square centimeter is at least 15. The number of openings per square centimeter is selected according to the protection requirements. If z. B. is known that softwood chips will be incurred in forestry work, a coarser grid can be selected. On the other hand, a finer grid should be chosen for the accumulation of hardwood chips. Rough in the present context means z. B. 16 openings / cm 2 , however, fine z. B. 39 openings / cm 2 .

In einer weiteren Ausgestaltung des Visiers nach der Erfindung ist die Dicke der Gitterstege umgekehrt proportional zu der Zahl der Öffnungen je Quadratzentimeter gewählt. So kann bei dem gewählten groben Gitter mit 16 Öffnungen/cm2 die Dicke der Gitterstege ca. 0,3 mm betragen, hingegen bei dem feinen Gitter mit 39 Öffnungen/cm2 ca. 0,2 mm. Die zugehörige Höhe von einer Zeile von Öffnungen der Gitterstruktur kann bei den beiden vorgenannten Beispielen ca. 3 mm bzw. ca. 2 mm betragen, wobei dieser Wert dann auch die erfindungsgemäße Mindestbreite von einer Zeile von Öffnungen der Gitterstruktur sein würde.In a further embodiment of the visor according to the invention, the thickness of the grid bars is chosen inversely proportional to the number of openings per square centimeter. Thus, with the selected coarse grid with 16 openings / cm 2, the thickness of the grid bars can be about 0.3 mm, whereas in the case of the fine grid with 39 openings / cm 2 about 0.2 mm. The associated height of one row of openings of the lattice structure may be about 3 mm or about 2 mm in the two aforementioned examples, and this value then also the minimum width according to the invention would be from one row of openings of the lattice structure.

In einer weiteren Ausgestaltung des Visiers nach der Erfindung sind die Gitterstege in einer dem Rand an seinem Umfang benachbarten Zone, deren Breite wenigstens gleich der vertikalen Höhe von einer der Zeilen ist, dicker ausgebildet als die Gitterstege der übrigen Öffnungen. Dadurch lässt sich eine weitere Steigerung der ohnehin schon hohen und an sich ausreichenden Stabilität des Visiers nach der Erfindung erzielen.In a further embodiment of the visor according to the invention, the grid bars are formed thicker in a zone adjacent to the edge at its periphery whose width is at least equal to the vertical height of one of the rows, as the grid webs of the remaining openings. This makes it possible to achieve a further increase in the already high and in itself sufficient stability of the visor according to the invention.

In einer weiteren Ausgestaltung des Visiers nach der Erfindung ist die Breite der Zone im Wesentlichen gleich der Höhe von zwei vertikal benachbarten Zeilen von Öffnungen der Gitterstruktur. Die Zone hat somit im Vergleich zu dem Gitter insgesamt eine geringe Breite, die aber aufgrund der innerhalb der Zone dicker ausgebildeten Gitterstege die Festigkeit und die Stabilität des Gitters noch erheblich steigert. Der Transmissionsgrad innerhalb der Zone ist im Wesentlichen gleich dem Transmissionsgrad des Gitters außerhalb der Zone, weil die Flächeninhalte der Öffnungen, die von dickeren Stegen umgeben sind, im Wesentlichen gleich denen der Öffnungen sind, die von dünneren Gitterstegen umgeben sind.In a further embodiment of the visor according to the invention, the width of the zone is substantially equal to the height of two vertically adjacent rows of openings of the lattice structure. The zone thus has in total compared to the grid a small width, but still significantly increases the strength and stability of the grid due to the thicker formed within the grid bars. The transmittance within the zone is substantially equal to the transmittance of the grating outside the zone because the areas of the openings surrounded by thicker lands are substantially equal to those of the openings surrounded by thinner grid bars.

In einer weiteren Ausgestaltung des Visiers nach der Erfindung haben die Öffnungen in der Zone den gleichen vertikalen Mittenabstand wie die Öffnungen in dem übrigen Gitter. Die erzielte zusätzliche Steifigkeit des Gitters beeinträchtigt nicht den Lichttransmissionsgrad, insbesondere nicht den der sogenannten Durchblicköffnung, weil die Zone am Rand des Gitters liegt und weil darüber hinaus alle Öffnungen des Gitters außerhalb und innerhalb der Zone im gleichen Raster angeordnet sind.In a further embodiment of the visor according to the invention, the openings in the zone have the same vertical center distance as the openings in the remaining grid. The achieved additional rigidity of the grid does not affect the light transmission, in particular not the so-called through-view, because the zone is at the edge of the grid and because, moreover, all the openings of the grid outside and within the zone are arranged in the same grid.

In einer weiteren Ausgestaltung des Visiers nach der Erfindung ist das Gitter aus Federstahlblech hergestellt. In diesem Fall kann ein dünnes Feinblech eingesetzt werden, um die erwünschte Stabilität bei geringstem Gewicht des Schutzschirms zu erzielen und insbesondere einen Schutz gegen Teilchen hoher Geschwindigkeit zu gewährleisten.In a further embodiment of the visor according to the invention, the grid is made of spring steel sheet. In this case, a thin sheet can be used to achieve the desired stability with the least weight of the protective screen, and in particular to ensure protection against high-speed particles.

In einer weiteren Ausgestaltung des Visiers nach der Erfindung ist das Gitter durch Ätzen hergestellt. Ätzen ist die bevorzugte Herstellungsmethode, wenn für das Gitter des Schutzschirms Metall eingesetzt wird. Gesichtsschutzschirme lassen sich zwar auch mit einem gewebten Metalldraht- oder Kunststoffgitter herstellen, solche Gitter haben jedoch für den Träger verschiedene Nachteile, die geätzte Metallgitter nicht aufweisen. Solche Nachteile bestehen z. B. darin, dass die Drähte einen großen Teil der Gesamtfläche des Gitters einnehmen und eine geringere Stabilität und mechanische Festigkeit als ein geätztes Metallgitter ergeben. Darüber hinaus können solche gewebten Draht- oder Kunststoffgitter von spitzen Gegenständen wie spitzen Ästen oder Zweigen durchdrungen werden, weil Drähte oder Kunststofffäden relativ zueinander verschiebbar sind.In a further embodiment of the visor according to the invention, the grid is produced by etching. Etching is the preferred method of production when metal is used for the grid of the protective screen. Although face shields can also be made with a woven metal wire or plastic mesh, such meshes have various disadvantages for the wearer that etched metal mesh does not have. Such Disadvantages exist z. Example, in that the wires occupy a large part of the total area of the grid and give a lower stability and mechanical strength than an etched metal mesh. In addition, such woven wire or plastic mesh can be penetrated by pointed objects such as sharp branches or branches, because wires or plastic threads are displaced relative to each other.

In einer weiteren Ausgestaltung des Visiers nach der Erfindung weist eine innere, dem Gitter zugewandte Berandung des Tragrahmens einen Abstand von einem inneren, an das Gitter anschließenden Umfang des Randes auf. Dadurch ist auf einfache Weise ein sauberes Aussehen der inneren Berandung des Tragrahmens gewährleistet.In a further embodiment of the visor according to the invention, an inner edge of the support frame facing the grille is at a distance from an inner circumference of the edge adjoining the grille. As a result, a clean appearance of the inner boundary of the support frame is ensured in a simple manner.

Ausführungsbeispiele der Erfindung werden im Folgenden unter Bezugnahme auf die Zeichnungen näher beschrieben. Es zeigen:

Fig. 1
in Draufsicht ein erstes Ausführungsbeispiel eines Schutzschirms eines ansonsten nicht dargestellten Visiers nach der Erfindung mit einem Gitter aus Federstahlblech,
Fig. 1a
eine Einzelheit des Schutzschirms nach Fig. 1 in größerem Maßstab,
Fig. 2
ein zweites Ausführungsbeispiel des Schutzschirms des Visiers nach der Erfindung mit einem Gitter aus Federstahlblech, das eine feinere Gitterstruktur als das Gitter des ersten Ausführungsbeispiels aufweist,
Fig. 2a
eine Einzelheit des Schutzschirms nach Fig. 2 in größerem Maßstab,
Fig. 3
ein drittes Ausführungsbeispiel des Schutzschirms des Visiers nach der Erfindung, das dem ersten Ausführungsbeispiel entspricht, aber im Randbereich eine andere Gitterstruktur hat,
Fig. 3a
als eine Einzelheit den Randbereich des Schutzschirms nach Fig. 3 in größerem Maßstab,
Fig. 4
ein viertes Ausführungsbeispiel des Schutzschirms des Visiers nach der Erfindung, das dem zweiten Ausführungsbeispiel entspricht, aber in einer dem Rand benachbarten Zone eine andere Gitterstruktur hat, und
Fig. 4a
als eine Einzelheit die Zone und einen benachbarten Bereich des Schutzschirms nach Fig. 4 in größerem Maßstab.
Embodiments of the invention will be described in more detail below with reference to the drawings. Show it:
Fig. 1
in plan view, a first embodiment of a protective shield of a visor, not shown otherwise according to the invention with a grid of spring steel sheet,
Fig. 1a
a detail of the protective screen Fig. 1 on a larger scale,
Fig. 2
A second embodiment of the shield of the visor according to the invention with a grid of spring steel sheet, which has a finer grid structure than the grid of the first embodiment,
Fig. 2a
a detail of the protective screen Fig. 2 on a larger scale,
Fig. 3
A third embodiment of the protective screen of the visor according to the invention, which corresponds to the first embodiment, but in the edge region has a different lattice structure,
Fig. 3a
as a detail following the edge area of the protective screen Fig. 3 on a larger scale,
Fig. 4
A fourth embodiment of the protective screen of the visor according to the invention, which corresponds to the second embodiment, but in a zone adjacent to the edge has a different lattice structure, and
Fig. 4a
as a detail, the zone and an adjacent area of the protective screen Fig. 4 on a larger scale.

Fig. 1 zeigt in Draufsicht ein insgesamt mit 10 bezeichnetes erstes Ausführungsbeispiel eines Schutzschirms 10 eines ansonsten nicht dargestellten Visiers nach der Erfindung mit einem Gitter 12 aus einem dünnen Federstahlblech. Ein Tragrahmen 52 des Visiers ist in Fig. 4 angedeutet. Fig. 1 shows in plan view a generally designated 10 first embodiment of a protective shield 10 of an otherwise not shown visor according to the invention with a grid 12 made of a thin spring steel sheet. A support frame 52 of the visor is in Fig. 4 indicated.

Fig. 1a zeigt eine Einzelheit des Schutzschirms 10 nach Fig. 1 in größerem Maßstab. Das Gitter 12 hat eine Gitterstruktur, die aus einer Vielzahl von gegenseitig benachbarten Zeilen von unrunden Öffnungen 14 gebildet ist. Gemäß der Darstellung in Fig. 1a sind die Öffnungen jeweils sechseckig und durch gemeinsame Gitterstege 16 begrenzt, die eine Dicke D haben. Die Öffnungen 14 des Gitters 12 haben jeweils den gleichen Flächeninhalt, abgesehen von an einen umlaufenden, gitterstrukturfreien Rand 18 unmittelbar angrenzenden Teilöffnungen 13, die aber insgesamt vernachlässigbar sind. Weiter haben aufgrund dieses Aufbaus jeweils zwei benachbarte Zeilen von Öffnungen 14 des Gitters ein und denselben vertikalen Mittenabstand M. Fig. 1a shows a detail of the protective screen 10 after Fig. 1 on a larger scale. The grid 12 has a grid structure formed of a plurality of mutually adjacent rows of non-circular openings 14. As shown in Fig. 1a the openings are each hexagonal and bounded by common lattice webs 16, which have a thickness D. The openings 14 of the grid 12 each have the same surface area, apart from to a circumferential, lattice-structure-free edge 18 immediately adjacent partial openings 13, but which are negligible overall. Further, due to this structure, each two adjacent rows of openings 14 of the grid have one and the same vertical center distance M.

Das Gitter 12 ist von dem Rand 18 umschlossen, der eine Breite B hat, die wenigstens gleich einer Höhe H von einer Zeile von Öffnungen 14 der Gitterstruktur ist. Vorzugsweise ist die Breite des Randes 10 wenigstens gleich der Höhe von zwei vertikal benachbarten Zeilen von Öffnungen 14 der Gitterstruktur.The grid 12 is enclosed by the rim 18, which has a width B that is at least equal to a height H of one row of apertures 14 of the grid structure. Preferably, the width of the rim 10 is at least equal to the height of two vertically adjacent rows of apertures 14 of the grid structure.

Der Rand 18 ist mit über seine Länge verteilten Durchgangslöchern 15, 17 versehen, die überwiegend jeweils wesentlich kleiner als jede der Öffnungen 14 des Gitters 12 sind. Bei dem in den Fig. 1 und 1a dargestellten ersten Ausführungsbeispiel des Schutzschirms 10 handelt es sich bei diesen Durchgangslöchern um Durchgangslöcher 15 größeren Durchmessers und überwiegend um Durchgangslöcher 17 kleineren Durchmessers. Jedes Durchgangsloch 15 hat im Wesentlichen den gleichen Flächeninhalt wie eine der Öffnungen 14 der Gitterstruktur. Die Durchgangslöcher 15 größeren Durchmessers sind Passlöcher, die das Einsetzten des Schutzschirms 10 in eine Bearbeitungsmaschine erleichtern, in der der Schutzschirm in seiner Gesamtheit mit einer Schutzschicht beschichtet wird und/oder in der der Schutzschirm mit einem Tragrahmen (in den Fig. 1 und 1a nicht dargestellt) umspritzt wird. Die Durchgangslöcher 17 kleineren Durchmessers, von denen wesentlich mehr als von den Durchgangslöchern 15 größeren Durchmessers vorhanden sind, lassen den Kunststoff bei dem Anspritzen des in Fig. 4 angedeuteten Tragrahmens 52 hindurchtreten, um die Verbindung zwischen dem Gitter 12 und dem Tragrahmen 52 zu verbessern.The rim 18 is provided with through-holes 15, 17 distributed over its length, which are predominantly each substantially smaller than each of the openings 14 of the grid 12. In the in the Fig. 1 and 1a illustrated first embodiment of the protective shield 10, these through holes are through holes 15 of larger diameter and mainly around through holes 17 of smaller diameter. Each through hole 15 has substantially the same area as one of the openings 14 of the lattice structure. The larger diameter through holes 15 are fitting holes facilitating the insertion of the shield 10 into a processing machine in which the shield is coated in its entirety with a protective layer and / or in which the shield is provided with a support frame (shown in Figs Fig. 1 and 1a not shown) is overmoulded. The through holes 17 of smaller diameter, of which much more than from the through holes 15 of larger diameter present are, let the plastic in the molding of in Fig. 4 indicated support frame 52 pass to improve the connection between the grid 12 and the support frame 52.

Fig. 2 zeigt ein insgesamt mit 20 bezeichnetes zweites Ausführungsbeispiel eines Schutzschirms des Visiers nach der Erfindung mit einem Gitter 22 aus Federstahlblech, das Öffnungen 24 hat, die kleiner als die Öffnungen 14 sind, und eine feinere Gitterstruktur als das Gitter 12 des ersten Ausführungsbeispiels aufweist. Die Mindestanzahl der Öffnungen 14, 24 im Gitter 12 bzw. 22 je Quadratzentimeter beträgt mindestens 15 entsprechend DIN EN 1731. Die tatsächlich verwendete Anzahl der Öffnungen im Gitter wird nach den Schutzanforderungen ausgewählt, also danach, ob zum Beispiel ein Schutz vor fliegenden Teilchen zu gewährleisten ist, bei denen es sich um Weichholzspäne oder um Hartholzspäne handelt. Das Gitter 22 hat Gitterstege 26, die eine Dicke D haben, welche umgekehrt proportional zu der Zahl der Öffnungen je Quadratzentimeter gewählt ist. Bei dem ersten Ausführungsbeispiel des Schutzschirms des Visiers nach Erfindung ist das Gitter 12 ein groberes Gitter mit sechzehn Öffnungen 14 je Quadratzentimeter. Bei dem zweiten Ausführungsbeispiel des Schutzschirms 20 des Visiers nach der Erfindung ist das Gitter 22 ein feineres Gitter mit neununddreißig Öffnungen 24 je Quadratzentimeter. Die Einzelheiten, die in den Fig. 1a und 2 gezeigt sind, lassen erkennen, dass die Dicke D der Gitterstege 16 bei dem groberen Gitter 12 größer ist als die Dicke D bei dem feineren Gitter 22. Die Einzelheiten in den Fig. 1a und 2a sind im gleichen Vergrößerungsmaßstab dargestellt, so dass unmittelbar zu erkennen ist, dass das grobere Gitter 22 wesentlich weniger Zeilen und Öffnungen 14 aufweist, als das feinere Gitter 22 Zeilen von Öffnungen 24 hat. Die Öffnungen 24 des Gitters 22 haben alle denselben Flächeninhalt. Gleiches gilt für die Öffnungen 14 des Gitters 12, wobei aber das Gitter 22 bei gleichem Flächeninhalt wie das Gitter 12 wesentlich mehr Öffnungen 24 aufweist, als das Gitter 12 Öffnungen 14 hat. Fig. 2 shows a generally designated 20 second embodiment of a shield of the visor according to the invention with a grid 22 made of spring steel sheet having openings 24 which are smaller than the openings 14, and has a finer grid structure than the grid 12 of the first embodiment. The minimum number of openings 14, 24 in the grid 12 or 22 per square centimeter is at least 15 according to DIN EN 1731. The actually used number of openings in the grid is selected according to the protection requirements, that is, whether, for example, to ensure protection against flying particles which are softwood chips or hardwood chips. The grid 22 has grid bars 26 having a thickness D that is inversely proportional to the number of openings per square centimeter. In the first embodiment of the shield of the visor according to the invention, the grid 12 is a coarser grid with sixteen openings 14 per square centimeter. In the second embodiment of the shield 20 of the visor of the invention, the grid 22 is a finer grid having thirty-nine openings 24 per square centimeter. The details that are in the Fig. 1a and 2 can be seen that the thickness D of the grid bars 16 in the coarser grid 12 is greater than the thickness D in the finer grid 22. The details in the Fig. 1a and 2a are shown at the same magnification, so it can be seen immediately that the coarser grid 22 has substantially fewer rows and openings 14 than the finer grid has 22 rows of openings 24. The openings 24 of the grid 22 all have the same area. The same applies to the openings 14 of the grid 12, but the grid 22 has the same surface area as the grid 12 substantially more openings 24, as the grid 12 has openings 14.

Fig. 3 zeigt ein insgesamt mit 30 bezeichnetes drittes Ausführungsbeispiel des Schutzschirms des Visiers nach der Erfindung, das dem Schutzschirm 10 nach dem ersten Ausführungsbeispiel entspricht, aber im Randbereich eine andere Gitterstruktur hat. Figur 3a zeigt als eine Einzelheit den Randbereich des Schutzschirms 30 nach Figur 3 in größerem Maßstab. Gleiche Teile wie in den Figuren 1 und 2 sind in den Figuren 3 und 4 mit gleichen Bezugszeichen versehen und brauchen nicht erneut beschrieben zu werden. Fig. 3 shows a generally designated 30 third embodiment of the shield of the visor according to the invention, which corresponds to the protective shield 10 according to the first embodiment, but has a different lattice structure in the edge region. FIG. 3a shows as a detail the edge region of the protective screen 30 after FIG. 3 on a larger scale. Same parts as in the FIGS. 1 and 2 are in the Figures 3 and 4 provided with the same reference numerals and need not be described again.

Bei den Ausführungsbeispielen nach den Fig. 3 und 4 haben Gitterstege 36a bzw. 46a von in einer dem Rand 38 bzw. 48 benachbarten Zone 70 (in Fig. mit gestrichelter Begrenzung gezeigt) gelegenen Öffnungen 34a bzw. 44a eine größere Dicke D als Gitterstege 36b bzw. 46b der übrigen Öffnungen 34 bzw. 44. Dabei haben Öffnungen 34 und 34a bzw. 44 und 44a in benachbarten Zeilen außerhalb bzw. innerhalb der Zone 70 den gleichen vertikalen Mittenabstand M wie die Öffnungen in den übrigen benachbarten Zeilen des Gitters 32 bzw. 42.In the embodiments of the Fig. 3 and 4 have lattice webs 36a and 46a of in one of the edge 38 and 48 adjacent zone 70 (in Fig. With dashed boundary shown openings) 34a and 44a has a greater thickness D than lattice webs 36b and 46b of the remaining openings 34 and 44. In this case, have openings 34 and 34a and 44 and 44a in adjacent lines outside or within the zone 70, the same vertical Center distance M as the openings in the remaining adjacent rows of the grid 32 and 42nd

Die Zone 70 hat eine Breite BZ, die wenigsten gleich der vertikalen Höhe H von einer der Zeilen ist. In den Ausführungsbeispielen nach den Fig. 3 und 4 ist die Breite BZ der Zone 70 im Wesentlichen gleich der Höhe von zwei vertikal benachbarten Zeilen von Öffnungen 34 bzw. 44 der Gitterstruktur. Zur besseren Verdeutlichung der innerhalb der Zone 70 gelegenen Öffnungen 44a sind deren Flächen in Fig. 4a durch Punkte markiert. Die dickeren Stege der Öffnungen 44a werden durch eine etwas abgewandelte Sechseckform innerhalb der Öffnungen 44a gegenüber der Sechseckform innerhalb der Öffnungen 44 erzielt. In den Ecken des Sechsecks der Öffnungen 44a sind diese abgerundet ausgebildet, im Gegensatz zu den Ecken des Sechsecks der Öffnungen 44, die keinen Rundungsradius haben. Auf diese Weise werden bei gleichem Raster dickere Stege 46a der Öffnungen 44a als die Stege 46b der Öffnungen 44 erzielt, und zwar bei im Wesentlichen gleichem Flächeninhalt der Öffnungen 44a und 44.The zone 70 has a width BZ which is at least equal to the vertical height H of one of the lines. In the embodiments of the Fig. 3 and 4 For example, the width BZ of the zone 70 is substantially equal to the height of two vertically adjacent rows of openings 34 and 44, respectively, of the grid structure. To better illustrate the located within the zone 70 openings 44 a whose surfaces are in Fig. 4a marked by dots. The thicker webs of the apertures 44a are achieved by a somewhat modified hexagonal shape within the apertures 44a opposite the hexagonal shape within the apertures 44. In the corners of the hexagon of the openings 44a, these are rounded off, in contrast to the corners of the hexagon of the openings 44, which have no radius of curvature. In this way, with the same grid, thicker webs 46a of the openings 44a than the webs 46b of the openings 44 are achieved, with essentially the same surface area of the openings 44a and 44th

Die Schutzschirme 10, 20 und 30 können so wie der Schutzschirm 40 mit einer Zone 70 versehen werden, in der die Gitterstege dicker als im übrigen Teil des Gitters 12, 22 bzw. 32 ausgebildet sind.The protective screens 10, 20 and 30 can be provided, like the protective screen 40, with a zone 70 in which the grid bars are thicker than in the remaining part of the grid 12, 22 and 32, respectively.

Bei allen oben beschriebenen und in den Zeichnungen dargestellten Ausführungsbeispielen ist das Gitter 12, 22, 32 bzw. 42 aus Federstahlblech hergestellt, und zwar durch Ätzen. Nach einem photolitographischen oder dgl. Verfahren wird die Gitterstruktur mit einem Schutzlack auf das Metallblech aufgetragen. An allen nicht von Lack bedeckten Stellen wird das Gitter weggeätzt, um so die erwünschte Gitterstruktur mit dem sie umschließenden breiten Rand 18, 28, 38 bzw. 48 herzustellen.In all the embodiments described above and illustrated in the drawings, the grid 12, 22, 32 and 42 is made of spring steel sheet, by etching. After a photolithographic or the like. Process, the lattice structure is applied with a protective lacquer on the metal sheet. At all locations not covered by paint, the grid is etched away so as to produce the desired grid structure with the wide rim 18, 28, 38 and 48 surrounding it.

Der Schutzschirm 10, 20, 30 bzw. 40 wird mit einem Tragrahmen aus Kunststoff umspritzt und ist so als ein Visier für einen Schutzhelm, insbesondere einen Forstarbeiterhelm, einsetzbar. Dabei hat gemäß der in Fig. 4 angedeuteten Darstellung eine innere, dem Gitter 42 zugewandte Berandung 50 des angedeuteten Tragrahmens 52 einen Abstand A von einem inneren, an das Gitter 42 anschließenden Umfang 54 des Randes 48. Dadurch kommt der Tragrahmen 52 mit dem eigentlichen Gitter 42 nicht in Berührung und hat nach seiner Herstellung eine gleichmäßige innere Begrenzung.The protective screen 10, 20, 30 and 40 is encapsulated with a support frame made of plastic and is thus as a visor for a protective helmet, in particular a forestry helmet, used. It has according to the in Fig. 4 an illustration shown an inner, the grid 42 facing boundary 50 of the indicated support frame 52 a distance A from an inner, adjoining the grid 42 circumference 54 of the edge 48th Thus the support frame 52 does not come into contact with the actual grid 42 and has a uniform inner boundary after its manufacture.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Schutzschirmshield
1212
Gittergrid
1313
Teilöffnungpartial opening
1414
Öffnungopening
1515
DurchgangslochThrough Hole
1616
Gittersteggrid bar
1717
DurchgangslochThrough Hole
1818
Randedge
2020
Schutzschirmshield
2222
Gittergrid
2323
Teilöffnungpartial opening
2424
Öffnungopening
2626
Gittersteggrid bar
2828
Randedge
3030
Schutzschirmshield
3232
Gittergrid
3333
Teilöffnungpartial opening
34a34a
Öffnungopening
36a36a
Gittersteggrid bar
36b36b
Gittersteggrid bar
3838
Randedge
4040
Schutzschirmshield
4242
Gittergrid
4343
Teilöffnungpartial opening
4444
Öffnungopening
44a44a
Öffnungopening
46a46a
Gittersteggrid bar
46b46b
Gittersteggrid bar
4848
Randedge
5050
Berandungboundary
5252
Tragrahmensupporting frame
5454
innerer Umfanginner circumference
7070
ZoneZone
AA
Abstanddistance
BB
Breitewidth
DD
Stegdickeweb thickness
HH
Höheheight
MM
Mittenabstandcenter distance
BZBZ
Zonenbreitezone width

Claims (10)

  1. A visor for a protective helmet, particularly a forestry worker's helmet, comprising a protective shield (10, 20, 30,40) for the face, and particularly the eyes of a person, against flying particles and pointed objects, in particular during forestry work,
    comprising a mesh (12, 22, 32, 42) having a mesh structure which is formed of a plurality of mutually adjacent rows of noncircular openings (14, 24, 34, 44) which are delimited by mesh webs (16, 26, 36a, 36b, 46a, 46b) which are common to the openings,
    wherein the openings (14, 24, 34, 44, 54), apart from part-openings (13, 23, 33, 43) which immediately adjoin a rim (18, 28, 38, 48) of the mesh (12, 22, 32, 42) which is without a mesh structure, in each case have a substantially identical surface area,
    wherein the rim (18, 28, 38, 48) encloses the mesh (12, 22, 32, 42) and has a width (B) along its circumference which is at least equal to a height (H) of a row of openings (14, 24, 34, 44) of the mesh structure,
    characterized in that the rim (18, 28, 38, 48) of the protective shield (10, 20, 30,40) is insertion-molded with a support frame (52) of plastic.
  2. The visor as claimed in claim 1, characterized in that the width (B) of the rim (18, 28, 38, 48) is, along its circumference, at least equal to the height (H) of two vertically adjacent rows of openings (14, 24, 34, 44) of the mesh structure.
  3. The visor as claimed in claim 1 or 2, characterized in that the rim (18, 28, 38, 48) is provided with clearance holes (15, 17) which are distributed across its length and which predominantly are each smaller than the mesh openings (14, 24, 34a, 34b, 44a, 44b).
  4. The visor as claimed in one of the preceding claims, characterized in that the minimum number of openings (14, 24, 34a, 34b, 44a, 44b) in the mesh (12, 22, 32, 42) per square centimeter is at least 15.
  5. The visor as claimed in one of the preceding claims, characterized in that in a zone (70) the width of which is at least equal to the vertical height (H) of one of the rows and that is adjacent to the rim (38, 48) on its circumference, the mesh webs (36a, 46a) are configured to be thicker than the mesh webs (36b, 46b) of the remaining openings (34, 44).
  6. The visor as claimed in claim 5, characterized in that the width (BZ) of the zone (70) is substantially equal to the height (H) of two vertically adjacent rows of openings (14, 24, 34, 44) of the mesh structure.
  7. The visor as claimed in claim 5 or 6, characterized in that the openings (34a, 44a) in the zone (70) have the same vertical center spacing (M) as the openings (34, 44) in the remaining mesh (32, 42).
  8. The visor as claimed in one of the preceding claims, characterized in that the mesh (12, 22, 32, 42) is manufactured from spring steel sheet.
  9. The visor as claimed in claim 8, characterized in that the mesh (12, 22, 32, 42) is manufactured by etching.
  10. The visor as claimed in one of the preceding claims, characterized in that an inner boundary (50) of the support frame (52) facing the mesh (12, 22, 32, 42) has a distance (A) to an inner circumference (54) of the rim (18, 28, 38, 48) adjoining to the mesh (12, 22, 32, 42).
EP13780336.7A 2012-10-26 2013-10-16 Protective screen and visor produced therewith for a safety helmet, particularly a forestry worker's helmet Active EP2911540B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012021587.8A DE102012021587B4 (en) 2012-10-26 2012-10-26 Visor for a protective helmet, in particular a forestry helmet
PCT/EP2013/071629 WO2014063969A1 (en) 2012-10-26 2013-10-16 Protective screen and visor produced therewith for a safety helmet, particularly a forestry worker's helmet

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EP2911540A1 EP2911540A1 (en) 2015-09-02
EP2911540B1 true EP2911540B1 (en) 2017-07-19

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EP13780336.7A Active EP2911540B1 (en) 2012-10-26 2013-10-16 Protective screen and visor produced therewith for a safety helmet, particularly a forestry worker's helmet

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US (1) US20150272259A1 (en)
EP (1) EP2911540B1 (en)
AU (1) AU2013336891B2 (en)
CA (1) CA2889590C (en)
DE (1) DE102012021587B4 (en)
NZ (1) NZ707340A (en)
WO (1) WO2014063969A1 (en)

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US20220029392A1 (en) * 2020-07-24 2022-01-27 Sherman + Reilly, Inc. Line pulling systems and devices

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Also Published As

Publication number Publication date
EP2911540A1 (en) 2015-09-02
WO2014063969A1 (en) 2014-05-01
DE102012021587B4 (en) 2015-03-19
US20150272259A1 (en) 2015-10-01
CA2889590A1 (en) 2014-05-01
DE102012021587A1 (en) 2014-04-30
NZ707340A (en) 2017-08-25
CA2889590C (en) 2019-05-28
AU2013336891B2 (en) 2017-06-29
AU2013336891A1 (en) 2015-05-14

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