DE9204174U1 - Axle extension for overhead door closer - Google Patents

Description

Reference number 1991040 DE Keyword: axle extension Description

The invention relates to an overhead door closer which has an axle extension between its pivoting actuating arm and the door closer for the purpose of better adaptation to structural conditions.

Axle extensions have become known which are provided with Hirth teeth. However, these have the disadvantage that they only create a positive connection. In order to also subject the axle extension to force-locking stress, this connection must also be created using a screw element.

The object of the invention is to create an overhead door closer that can be used universally with normal accessories, in this case in particular the operating arm, without the operating arm having to be replaced, for example. The connection between the door closer shaft end, the axle extension and the operating arm must also be able to be made by a force-fitting and form-fitting connection without additional fastening elements.

The problem is solved according to the invention in that an axle extension is placed between the actuating arm and the protruding closer shaft end. This axle extension has an inner square that runs diagonally in the axial direction and is placed on the closer shaft end in a force-locking and form-fitting manner. At the other end of the axle extension there is an outer square of the same size as on the closer shaft, so that the usual normal actuating arm can be placed on. The actuating arm is then screwed onto the closer shaft via the axle extension, which acts as an intermediate piece.

axle is additionally secured. These axle extensions can be designed in different heights so that they can be subsequently adapted to the structural conditions. This measure means that it is not necessary to keep a large stock of different actuating arms, because the exchangeable intermediate pieces (axle extensions) enable universal adaptation to structural requirements.

The subject matter of the invention will be explained in more detail using an embodiment shown schematically in a drawing. It shows:

Figure 1: Possible use of an axle extension

The end of the closing shaft with its axle outlet (2) of the overhead door closer protrudes from the door closer housing (not shown). This axle outlet (2) has an external square (13), which is normally intended to accommodate the actuating arm and has a bevel at its end (1). However, if, due to structural conditions, a dimensional adjustment of the actuating arm (6) is necessary to connect to the end of the closing shaft (2), an intermediate piece, in this case an axle extension (5), must be inserted in between.

The axle extension (5) is designed in such a way that it has an internal square (8) which fits positively and force-fittingly onto the external square (13) of the axle outlet (2) of the closer shaft. At the same time, at the other end of the axle extension (5) there is an external square (9) which is identical in its dimensions to the external square (13) of the closer shaft. This makes it possible for the actuating arm (6) with its fastening eye (7) and the internal square (14) located therein to be connected positively and force-fittingly to the axle extension.

ts is thus first applied to the axle outlet (2) of the
The axle extension (5) is placed on the closing shaft and then the fastening eye (7) of the actuating arm (6) is placed on the external square of the extension.
a screw (10) the actuating arm is finally

(6) and the axle extension (5) are secured against unintentional loosening via the internal thread (4) of the locking shaft (2).

This simple option means that there is no need for complex storage of different actuating arms, because the axle extensions (5) can be designed to be of different heights. Instead of the internal square, another force-fitting and form-fitting mount can also be selected.

Reference symbols

1 slope

2 Axle exit of the closer shaft

3 Lever mount 4 Internal thread

5 Axle extension

6 Actuating arm

7 Mounting eye

8 Internal square &iacgr;&ogr; 9 External square

10 Screw

13 External square

14 square socket

Claims (5)

Expectations 1. Overhead door closer with a closer shaft that can be actuated in the closing direction by a spring arrangement and a damping piston that is operatively connected to it, as well as a pivotable actuating arm that is coupled to the closer shaft at one end, characterized in that a replaceable axle extension (5) is present between the axle outlet (2) of the closer shaft and the fastening eye (7) of the actuating arm (6). 2. Overhead door closer according to claim 1, characterized in that the axle extension (5) has an inner square (8) which fits in a force-fitting and form-fitting manner onto the outer square (13) of the axle outlet (2). 3. Overhead door closer according to claim 1, characterized in that the axle extension (5) has an external square (9) with the same geometric dimensions, which is identical to the external square (13) of the axle outlet (2). 4. Overhead door closer according to claims 1 to 3, characterized in that the outer square (9) and (13) and the inner square (8) and (14) are provided with a bevel (1) on their surfaces. 5. Overhead door closer according to claims 1 to 3, characterized in that the axle extension has a toothing or other positive connection.