DK147196B - ADJUSTABLE PROTECTION SHIELD FOR TOOL MACHINERY - Google Patents

Description

The invention relates to an adjustable protective machine tool screen which is of the kind specified in the preamble of claim 1.

5 When operating a chip-making machine tool such as a lathe, the hot chips thrown away from the machined workpiece can cause serious damage to the operator. Eye damage is especially common in machine factories. To avoid said damage, it is necessary either to use personal protective equipment such as goggles or masks or to provide the machine tools with protective enclosure or cover.

Personal protective equipment is often 'uncomfortable' and easily scratched, as well as being easily inhibited in the work process. As. as a result, the protective agents are often removed when it is necessary to carefully observe the workpiece being machined while machining is in progress. The risk of accidents in these circumstances is self-evident.

For example, rotary milling machines are generally formed with laterally movable vertical shields usually made of steel. Such protective screens are relatively useful in connection with longer-lasting machining processes (for example, for the production of gears), but are impractical and inconvenient for shorter-duration operations. The screens prevent undisturbed observation of the machining process and cause it to be difficult and slow to change both the workpiece being machined and the machine tool machining tools.

2 U719-6 1 For some machines, such as lathes and rotary grinders, the above-described protective screens do not apply at all, and usually used on such machines are protective glasses or 5 shielding devices which are carried by arms and which are attached to the machine tool chassis by means of of screws or magnets. Such arrangements are described, for example, in Finnish Patent Specification No. 28,678 and in German Patent Application No. 2,451,560. However, these arrangements have several drawbacks: the supporting arm members interfere with free vision, the construction is unstable, the screens are not sufficiently adjustable and the area covered by the screens is too small.

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English patent No. 1,558,513 discloses a screen suspended in a guide rail mounted above the machine tool. The screen can therefore only be displaced in the longitudinal direction of the machine tool. It is impossible to get 20 close to the workpiece without removing the protective screen. Therefore, it is not possible to thoroughly inspect small workpieces and at the same time be protected by the screen.

The object of the invention is to remedy the above-mentioned disadvantages, and this is achieved by providing the carriage with guides so that the shield and frame, but overall and both suspended in the carriage, can be moved substantially in a horizontal position transversely to the front rail and the lathe. spindle.

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This ensures that the protective shield can be brought as close to the workpiece as the machine tool allows. Thus, it becomes possible to inspect even small items during machining itself, and at the same time have full protection from the shield. The protective screen according to the invention has a rigid structure and a stable structure, it is easily adjustable and movable in all directions, and it can be moved along the entire cutting area. Without difficulty, the protective screen can be connected so that it automatically moves e.g. along with the tool carriage.

Because of its support, the protective screen 10 is easy to move between different positions, which means that the use of the protective screen is more acceptable and therefore also takes place better than with the cumbersome, separate protective screens. The protective screen can simply be pulled aside, which is why replacing the workpiece or the tools of the machine tool does not cause any discomfort.

The invention will now be described in more detail with reference to the drawing, in which: FIG. 1 shows a preferred embodiment of the protective screen according to the invention, and FIG. 2 is a side view of a carriage and guide rail 25 at the screen ...

Figures 1 and 2 illustrate a preferred embodiment of the screen in which it is joined by a lathe. This configuration comprises the guide rails 1 parallel to the pivot spindle and attached to the vertical support rails 2, which in turn are attached to the support members 3. The support members 3 can be attached either to the back of the lathe or to another fixed foundation. In addition, the screen comprises the carriage 4, which is connected to the guide rails 1 by means of roller bearings or rollers 9, and to the said carriage the frame of the protective shield 5 is fixed in such a way that the frame 2 can be moved transversely in relative to the guide rails 1. The transparent shield 6 is secured to the frame 5 by hinges located at the upper edge of the shield 6. The frame 5 may be provided with a lamp 7 and a suction hose connection 10. 8. The height of the front rails 1 relative to the workpiece to be machined is easily adjustable when the guard is installed by adjusting the position of the support rails 2 relative to the support members 3. The front rails 1 and the support rails 2 are preferably made of an aluminum alloy, so that one can obtain reasonable support and structure that is both light and rigid.

In accordance with the diameter of the workpiece and turning cartridge 20, the shield 6 is set in an ideal position by moving the frame 5 relative to the carriage 4.

Their mutual position can be fixed e.g. using tightening screws. In addition, the shield 6 can be swung up and down in its hinge suspension. The entire carriage 4, including the shield 6, can be easily slid to the side of the guide rails 1, e.g. when the workpiece is replaced or measured.

The screen may be formed in several ways other than 30 according to this preferred embodiment, e.g. For example, the structure of the rails and their positions can be modified according to what is suitable for different types of machine tools.

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