| 摘要 |
The object of the invention is a spreading plug which preferably comprises plastic and has a plurality of slots in the plug cover, between which slots spreading segments are formed which are spread outward against the wall of the drilled hole when a screw or another spreading element is screwed into the central insertion channel of the plug. In order to obtain a plurality of spreading regions which are distributed over the axial plug length, for the purpose of a more uniform spreading action, a plurality of slot arrangements are provided which are arranged offset with respect to one another both in the circumferential direction and in the axial direction. Preferably, a first slot which extends over the diameter of the plug is provided over a part length of the shaft and a further continuous slot is provided, offset in the circumferential direction by 90°, over the remaining part of the plug length as far as the plug base. Here, the two slot pairs overlap one another in the central region. Moreover, preferably window slots which lie opposite one another are provided in the plug base region, in which window slots rotary vanes can move which are integrally formed on the plug sleeve by way of their plug-base-side end via a joint, spread outwards when the screw is screwed in and ensure both rotational securing and securing against being pulled out axially.
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