Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1979-10-19
1982-10-26
Jillions, John M.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421074B, A62B 3502, B65H 7548
Patent
active
043557724
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a rapid acting automatic belt arresting means with a main housing, a rewind shaft with an associated rewind spring and a wound belt, as well as a locking mechanism consisting of an inertia sensor, a moveably mounted locking element, a locking gear and a control part for engaging the locking element with the locking gear, and a rotational inertia for actuating the locking element upon excessive belt acceleration.
A device of the aforementioned type is known from German Pat. No. 23 49 613. In this rapid acting automatic belt arresting means the housing which receives the inertia sensor is mounted at the main housing. During an excessive vehicle delay the movement which is exerted by the inertia sensor must be received by a scanning device and transmitted to an auxilliary element, so that the locking element is caused by the auxilliary element to come into engagement with the locking gear for locking the belt movement. Thereby it was shown that essential movement cycles have to be taken into consideration until the locking element engages the locking gear. These movement cycles require a certain time wherein the belt is unwound from the belt automatically without interference. This means that before arresting the belt automatically an additional loose belt portion is provided whereby the body of the retained person is accelerated forwardly.
It is therefore an object of the invention to improve the known rapid acting automatic belt arresting means in such a manner that immediately after operating the inertia sensor an arresting of the locking gear is initiated without any time delay.
This object of the invention is obtained in that the housing of the inertia sensor is a unitary means with the control part, and that the inertia mass is directly coupled with the inertia sensor housing.
The invention obtains in an advantageous manner that each movement of the inertia sensor from its rest position directly causes a movement of the control part through which the engagement of the locking element with the locking gear is immediately initiated without activating auxilliary elements first. Due to the direct coupling of the rotational inertia with the inertia housing, an immediate initiation of the locking of the locking gear by the locking element takes place automatically during an exaggerated belt acceleration. This means, that after each activation of the rapid acting automatic belt arresting means caused either because of an exaggerated vehicle delay or an exaggerated belt acceleration an immediate locking of the locking gear by the locking element is initiated. Thereby only a very small rotation of the rewinding shaft is the result from activation of the inertia sensor to the engaging of the locking element in the locking gear. Also, due to the coupling of the inertia sensor housing with the inertia mass a forced synchronization of the locking is present after the belt acceleration. The elimination of an auxiliary element permits a very low construction width of the rapid acting automatic belt arresting means, which permits an easier installation for example in the door supports and the like. In view of the fact that the inertia sensor does not have to actuate an auxilliary element any longer through the provided sensor pawl, but that the reaction movement of the sensor housing is directly received from the control part, the sensor pawl which is in engagement with the inertia sensor may be constructed for lower loads.
In the following one embodiment of the invention is described and shown in the drawing. The drawing shows:
FIG. 1 a longitudinal sectional view through one side of a rapid acting automatic belt arresting means wherein the locking gear, as well as the locking element and the inertia sensor, as well as the rotational inertia mass for actuating the locking element during exaggerated acceleration are mounted,
FIG. 2 is a side view along line II--II of FIG. 1, and;
FIG. 3 a further side view along line III--III of FIG. 1.
A rewinding shaft 1 is rotatably mounted in a main housing
REFERENCES:
patent: 3058687 (1962-10-01), Bentley
patent: 3880381 (1975-04-01), Peel
patent: 3999722 (1976-12-01), Weman et al.
patent: 4059242 (1977-11-01), Tanaka
patent: 4066223 (1978-01-01), Takada
patent: 4083512 (1978-04-01), Rumpf
patent: 4090678 (1978-05-01), Yamanashi
patent: 4162773 (1979-07-01), Wallin
patent: 4167254 (1979-09-01), Paitula et al.
patent: 4187995 (1980-02-01), Rex
patent: 4190213 (1980-02-01), Ueda
Criss Roger H.
Jillions John M.
N.V. Klippan S.A.
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