DE20002785U1 - Hanger - Google Patents

Description

Patent Attorney Office Brami)aiÄr;^a-^-l|ei * CA ¹ Uz.: lqo:O2 785.9

Hanging device

The invention relates to a suspension device which is used in particular in roller shutter construction.

Currently, suspension devices specifically for roller shutters are known which are made from a punched spring material with a plastic hanger attached to it. The plastic hanger itself is connected to the spring material via a rivet. The lower end of the plastic hanger has two lips which run parallel but of different lengths. In operation, one of the two lips is so long that it has been formed at a right angle to the other lip and that part of the upper broad side of the roller shutter can be attached to it like a clip mechanism. The spring which is riveted to the middle of the plastic hanger is inserted at its opposite end with a tongue which first becomes narrower and then becomes extremely wide in rectangular recesses in a shaped octagonal steel tube shaft in such a way that the width of the recess corresponds to that of the narrower tongue. The wider outer end of the tongue is to be inserted diagonally into the respective recesses so that the narrow tongue can then be brought into operation directly in the narrower side of the rectangular recess, pointing vertically downwards at a right angle to the octagonal steel tube shaft.
On the one hand, the spring can become jammed and the roller shutter can come loose, resulting in the roller shutter raising and lowering unevenly, and on the other hand, the need for a complex punching tool to produce the spring are disadvantages that have resulted from the manufacture of the suspension device known to date.

Patent Attorney Office Brarnfcaiifcr; <£tX>-4SB-lllei *·α1&iacgr;£&zgr;.&EEgr;&thgr;&Ogr;&iacgr;&Ogr;2 785.9

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Therefore, the invention sets itself the task of making the plug-in connection between the 8-edge steel tube shaft and spring and the plastic suspension inseparable and, as a result, ensuring that the roller shutters can be raised and lowered evenly.

This object is achieved in conjunction with the preamble of claim 1 according to the invention in that the fastening of the spring is carried out with a through rivet made of plastic and on one surface of which a shaped piece is applied diagonally as a pressed plastic swivel joint and in function as a locking piece.

The suspension device according to the invention is - as already known - to be operated in conjunction with an octagonal steel tube shaft in order to be able to wind up and unwind or raise and lower the roller shutter. As is known, rectangular recesses are set in a plane of the octagonal steel tube shaft at regular intervals in the winding direction. The spring itself is now manufactured in a simpler form - without the currently known narrow and following wider tongue. According to the invention, the spring and the associated plastic hanger are held in the previously known planes of the octagonal steel tube shaft and in the rectangular recesses set in for this purpose by inserting a centrally arranged opening at the upper end of the spring, i.e. opposite the plastic hanger, in a specially manufactured tool and overmolding this opening using a glass fiber reinforced plastic. The shape of this plastic injection molded part

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Patent Attorney Office Brami>aufcr; (2t)Qf4&-lftei *jA1dJz.;£oojO2 785.9

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les now has this unusual shape in such a way that the plastic injection-molded part protrudes on both sides over the opening in the spring in the form of a wider rivet and on one surface of this a molded part approximately the same size as the rectangular recess in the octagonal steel tube shaft is placed diagonally, i.e. at an angle of approximately 45°. This locking mechanism made of glass fiber reinforced plastic in combination with the steel of the spring is undoubtedly more complex to manufacture than the state of the art, but is therefore particularly advantageous in its application due to easier assembly, a firmer hold and no breakage of the spring.

Further details of the invention are described in the drawing using a schematically illustrated embodiment.

This shows:

Figure 1 shows the state of the art and the

Figure 2 the inventive solution using the plastic=
swivel joint.

In Fig. 1, the suspension device is a stamped spring 1 made of spring steel and a plastic hanger 2 attached to it. The plastic hanger 2 itself is connected to the spring 1 via a rivet 3. At the opposite end of the plastic hanger 2, a tongue 4a; 4b that initially becomes narrower and then wider is attached to a shaped 8-edge steel bracket in rectangular recesses 5.

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tubular shaft 6 in such a way that each recess 5 corresponds in width to the narrower tongue 4a. The wider outer end of the tongue 4b is to be inserted diagonally into the respective recess 5 in order to then bring the narrow tongue 4a into operation directly in the narrower side and downward-pointing recess 5 at a right angle to the octagonal steel tubular shaft 6.

Figure 2 shows the solution according to the invention, in which a centrally arranged opening at the upper end of the spring 1, i.e. opposite the plastic hanger 2, is to be overmolded using a glass fiber reinforced plastic rivet 7. The shape of this plastic injection molded part now has this unusual shape that the plastic rivet 7 protrudes on both sides beyond the opening in the spring 1 and a molded part 8 as a locking device is to be adapted in size and shape to the rectangular recess 5 in the octagonal steel tube shaft 6 and is to be attached diagonally to one surface of the plastic rivet 7. In an inclined position, i.e. diagonally, the molded part 8 is to be inserted into the rectangular recess 5 of the octagonal steel tube shaft 6 in order to ultimately ensure the function of the suspension device at a right angle to the octagonal steel tube shaft 6. The dimension of the recess 5 in the 8-edge steel tube shaft 6 itself is approximately 5 x 8 mm and therefore also the additional molded part 8 at an angle of 45° on one side of the plastic rivet 7 in order to be able to use this as a plastic injection molded part and thus as a pressed plastic swivel joint in one unit.

Claims (3)

1. Suspension device with a spring and a plastic hanger attached to it, the plurality of which are lined up one after the other for hanging roller shutters in an octagonal steel tube shaft in such a way that at the opposite end of the plastic hanger a spring provided with a tongue can be let into rectangular recesses in the octagonal steel tube shaft, characterized in that an opening in the spring ( 1 ) opposite the plastic hanger ( 2 ) is to be filled with a plastic rivet ( 7 ) and one surface of this is to be provided with a molded part ( 8 ) made of the same material, the dimensions of which correspond to the recess ( 5 ) of the octagonal steel tube shaft ( 6 ), as a pressed plastic swivel joint. 2. Suspension device according to claim 1, characterized in that the molded part ( 8 ) is to be applied to the plastic rivet ( 7 ) at an angle of 45°. 3. Suspension device according to claim 1 and 2, characterized in that the plastic rivet ( 7 ) and the molded part ( 8 ) are to be manufactured from a glass fiber reinforced plastic in one casting.