DE29515836U1 - Face shield, especially for electrical work - Google Patents

Description

UVEX ARBEITSSCHUTZ GmbH & Co. KG, Würzburger Strasse 189, 90766 Fürth

Face shield, especially for electrical work

Face shields are used in different designs to protect a worker's face. Usually, such face shields are punched out of transparent plastic panels, for example acetate panels, and are bent by an upper frame part so that the shield encloses the user's face in an almost semicircular shape. The respective frame part can be provided with hinges for attachment to a protective helmet so that the face shield can be arranged on a helmet so that it can be swiveled up.

A problem with known face shields of this type when used for electrical work is that when very high voltages and the resulting arcs occur, the relatively sharp outer edges result in peak voltages, which can lead to the face shield catching fire and being destroyed, and thus naturally to injury or death for the user.

It is also known to break the edges created when punching the plastic discs by mechanical means, which on the one hand requires comparatively complex processing and on the other hand does not lead to the desired level of safety.

Based on this, the invention is based on the object of creating a transparent face shield, in particular for electrical work, which also safely protects the user in the event of an arc fault.

This object is achieved according to the invention in that a piping enclosing the outer edge of the plastic plug disc is placed thereon.

Preferably, such a piping is made of plastic, in particular PVC.

Furthermore, it can advantageously be provided that the piping is made conductive by a metal insert or by additives to the plastic.

Such a piping can be attached in particular by gluing or welding or with the help of the elastic clamping effect of the metal insert.

By means of a piping provided according to the invention, sharp edges or edges in general are avoided in the area of the outer edge of the transparent plastic pane, so that a peak voltage discharge cannot occur.

The effectiveness of the measure according to the invention can be impressively demonstrated by a practice-oriented test setup, which

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simulates the workplace situation of an electrician.

Then a test dummy with a face shield on is placed at a distance of 30 cm next to a switch box in which an arc fault is generated at a voltage of 400 V, a current of 10 kA and a time of 1000 ms.

While face shields according to the state of the art ignite and are destroyed under these conditions, the inventive

Face shields remain intact and reliably protect the user.

It should be noted that it is known to use piping to protect edges, e.g. in the automotive industry as a finish on welded sheet metal parts to cover the seam or in the sports sector to cover the edge of motorsport helmets.

What is completely new, however, is the realization that the use of such piping on face shields intended for electrical applications leads to an increase in safety against arc faults.

The invention is explained in more detail below using a preferred embodiment.

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Fig. 1 is a schematic perspective view of a face shield according to the invention, which can be folded up and arranged on a helmet, and

Fig. 2 shows a section through a piping used according to the invention.

A face shield 1 shown in the drawing in Fig. i consists of a punched acetate disc, which is held in an approximately semicircular shape by an upper frame part.

The upper frame part 2 is attached to a protective helmet 4 via a holding and pivot bearing arrangement and can accordingly be pivoted up on the helmet (as shown in the drawing) and pivoted down in the direction of the arrow 5 into a position of use.

A piping 6 is placed along the free outer edge of the pane 1. The piping 6, which is shown in section in Fig. 2, consists of a

in cross-section U-shaped PVC strand 7 with a metal system 8, whereby

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spring projections 10 are provided on the inside of the U-legs 9, which allow elastic sliding onto the disc 1 and securing it to it.

The metal insert 8 is configured in the longitudinal direction in the manner of a comb. In cross-section, the metal insert is U-shaped, clamp-like and thus supports easy installation of the piping 6.

Claims (7)

Expectations 1. Face shield, in particular for electrical workers!, consisting of a transparent, punched plastic disc, in particular with a shaping upper frame part, characterized in that a piping (6) enclosing the outer edge of the plastic disc (1) is placed on this. 2. Face shield according to claim 1, characterized in that the piping (6) consists of plastic. 3. Face shield according to claim 2, characterized in that the piping (6) consists of PVC. 4. Face shield according to claim 2, characterized in that the piping (6) has a metal insert (8) which is in particular configured in a comb-like manner. 5. Face shield according to claim 1, characterized in that the piping (6) is U-shaped in cross section. 6. Face shield according to claim 5, characterized in that elastic projections (10) are arranged on the inner sides of the U-legs (9) of the piping (6). 7. Face shield according to claim 4, characterized in that the metal insert (8) is U-shaped, clamp-like in cross section.