Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1983-01-21
1984-09-11
Jillions, John M.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421074C, A62B 3502, B65H 7548
Patent
active
044705573
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for rolling-up the belt of safety belts, in particular for motor vehicles, comprising: positioned at a right angle to the bottom, and is provided with two locking cams as well as two closed ended elongated slots, which in each instance extend in the one and the other side generally paralell to the pulling-out direction of the belt and are closed at one end, and locking disc with locking teeth on the outer periphery, and is supported in the elongated slots of the housing in such a manner that it can rotate and so that it can also move crosswise against the action of a spring-loading in the pulling-out direction of the belt, so that the teeth of the locking discs can engage in the locking cams of the housing.
Such devices are known (German Patent Publication No. 1,531,545). With these the two sides of the housing are both provided in the form of forks with two prongs, the forks being arranged at one end of the bottom of the housing, so that the prongs extend to the other end of the bottom. The winding-on shaft for the belt rests with its two outer ends in the two elongated slots of the forks, which in each instance are bounded by the two prongs of the one and the other fork and are open in the pulling-out direction of the belt. At the end facing away from the forks two struts are provided on the bottom of the housing, positioned at a right angle to same, which struts at their free ends are provided with the locking cams of the housing. The struts with the locking cams are in each instance arranged in front of the one and the other locking disc of the winding-on shaft, which are disposed towards the inner sides of each fork.
The winding-on shaft is made of two parts and consists of a central hollow shaft which is supported in the two forks, and of a drum positioned thereon in a rotatable manner, the two side walls of which are formed by the two locking discs. Between the drum and the hollow shaft a spring is arranged, which acts on the drum in the winding-on direction of the belt. At the two outer ends the hollow shaft, on both sides of the two forks, two rod-shaped levers are provided, which extend to the bottom of the housing, with the ends adjacent the bottom engaging with two projections on the bottom, i.e. on the side facing the forks. Normally the two levers hold the winding-on shaft in the two forks, so that it lies against the closed ends of the two elongated slots of the housing. However, when a sudden pull is exerted on the belt coming from the winding-on shaft in the pulling-out direction of the belt parallel to the bottom of the housing, then the winding-on shaft is pulled along so that its two locking discs engage with their teeth in the locking cams of the housing, and the winding-on shaft can no longer turn.
The aim of the invention is to create a device of the type mentioned at the outset, which can be produced, and in particular assembled, in a relatively simple and, therefore, inexpensive manner, and which notwithstanding the high mechanical strength required for a secure and reliable operation, has an only relatively small mass, and with which it should also be possible to reduce to a minimum the noises which occur during normal operation.
This aim is achieved in that length, and in each instance are approximately L-shaped with a broader section, a narrower section, each of the broader sections having a side generally facing the narrow section of the respective housing side, and said locking cams of the housing being provided in the zone of broader sections of the housing sides sections of the sides so that their closed ends face towards the locking cams and their open sides are situated on the side of the broader sections which faces the narrower section.
In the device according to the invention, the housing is designed in such a manner that it can to a far-reaching extent be produced mechanically, in a particular rendering possible a practically fully automatic assembling of the device, which reduces the production costs in a quite considerable manner, es
REFERENCES:
patent: 3074761 (1963-01-01), Ryan
patent: 3695545 (1972-10-01), Peters
patent: 3851837 (1974-12-01), Griffin
patent: 3876164 (1975-04-01), Dully
patent: 4101094 (1978-07-01), Wallin
patent: 4350313 (1982-09-01), Adomeit
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