DE29901636U1 - Winding device for a material web of a restraint device or the like. a vehicle, such as a combination car - Google Patents

Description

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Dipi.-ing. Harald Ostriga
Dipi.-ing. Bernd Sonnet*

Dipl.-Ing. JOChen-Peter WirthS Home address:

„ , . ... , Stresemannstr. 6-8

Registered at the European Patent Office _{42275 Wuppertal} . _Barrnen

Ostriga. Sonnet & Wirths ■ PO Box 20 16 53 ■ D-42216 Wuppert al

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Applicant:

Peter Butz GmbH & Co.
Administrative KG
Kronprinzstrasse 47-49

40764 Langenfeld

15 Designation

the invention:

Winding device for a material web of a restraint device or similar of a vehicle, such as a station wagon

The invention relates to a winding device for a material web of a restraint device or the like of a vehicle, such as a station wagon. Such a winding device is described in DE 29 41 711 A1.

The winding device according to DE 29 41 711 A1 represents a loading space cover for the trunk of a station wagon. The known winding device (see DE 29 41 711 A1 Fig. 2 Pos. 10) has a device axis arranged continuously between two axially spring-loaded end caps. Both outer end areas of the device axis are accommodated in the associated end cap in a rotationally fixed manner. In the known winding device, a torsion spring accumulator designed as a helical spring is connected to the device axis in a rotationally fixed manner with its first clamping end approximately in the middle area of the device axis. The second clamping end of the helical spring is adjacent to the associated

Postbank Credit and Volksbank eG Commerzbank AG VAT ID No. Eat Wuppertal-Barmen Wuppertal-Barmen VAT No. (Bank code 360 100 43)445 04-431 (Bank code 330 600 98) 301 891 024 (Bank code 330 400 01) 4 034 823 DE 121068676

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The end cap is connected in a rotationally fixed manner to the tubular winding shaft, which coaxially encloses the device axis/coil spring arrangement.

According to DE 29 41 711 A1, either one torsion spring accumulator or - if greater force is required or if the axial length of the winding device is greater - two torsion spring accumulators can be provided within the tubular winding shaft on the continuous device axis.

According to DE 29 41 711 Al, the inner edge of the material web (e.g. fabric web) is attached to the outer surface of the winding shaft. For this purpose, the inner edge of the material web has a piping, which is inserted into an axially extending undercut piping groove of the roll-formed tubular winding shaft.

To pull up or tension the torsion spring accumulator known from DE 29 41 711 A1, at least one of the two end caps is pressed axially inwards towards the adjacent front side of the winding shaft against the restoring force of a separate helical compression spring on the device axis, whereby the end cap is released from its rotationally fixed connection with the winding shaft. After the torsion spring accumulator has been pulled up, it can be blocked by an opposite axial return movement of the end cap. The pulled up torsion spring accumulator is automatically activated when the arrangement is inserted into the vehicle-side installation field, because when it is inserted, the end cap in question is again pressed axially inwards and is thereby released from its rotationally fixed connection with the winding shaft. In the known winding device

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The torsion spring accumulator can only be wound up after the entire assembly has been completed.

Based on the known winding device according to DE 29 41 711 A1, which is advantageous per se and has proven itself in practice to a large extent, the invention is based on the object of simplifying the known winding device with regard to its structure and manufacturing effort.

According to the invention, this object is achieved in that the device axis, with its inner end region projecting freely axially into the winding shaft, is arranged to be axially displaceable relative to the winding shaft, in that the first clamping end of the torsion spring accumulator is fastened to the inner end region of the device axis, and in that the outer end region of the device axis has primary coupling means which can be brought into or out of engagement with secondary coupling means coupling the winding shaft by axial displacement of the device axis relative to the winding shaft.

In contrast to the winding device according to DE 2 9 41 711 A1, the winding device according to the invention does not have a continuous device axis. Since the device axis according to the invention, with its inner end protruding axially into the winding shaft, is arranged to be axially displaceable relative to the winding shaft, a specific torsion spring motor (consisting of the torsion spring accumulator and the device axis) does not necessarily have to be combined with a winding shaft of a specific length.

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The torsion spring motor according to the invention is independent of a specific winding shaft length. This means that one and the same type of torsion spring motor according to the invention can be used for a large number of individually different winding shaft lengths. It is obvious that this results in both a structural simplification and a simplification of storage, and overall the advantage of less complex production.

Because - as mentioned above - the inner end region of the non-continuous device axis is arranged to be axially displaceable relative to the winding shaft, the prerequisite for further inventive features is also given, according to which the outer region of the device axis has primary coupling means which can be brought into or out of engagement with secondary coupling means coupling the winding shaft by the axial displacement of the device axis relative to the winding shaft.

The primary coupling means and secondary coupling means, which are operatively connected to one another, are given particular importance by a design of the invention, which consists in the fact that a driver part, which is received by the device axis, is integrated into the force flow between the second clamping end of the torsion spring accumulator and the winding shaft. This driver part forms the secondary coupling means, can be inserted into the winding shaft together with the device axis and can be connected to the latter in a force-locking and/or form-locking manner in a rotationally fixed manner. These features of the invention make it possible to test the torsion spring motor before it is assembled, i.e. before it is inserted into the winding shaft.

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to wind up and store in the wound up or tensioned state. The assembly of the torsion spring motor then essentially consists only in pushing it axially into the winding shaft with the inner end area of its device axis first until a positive, rotationally fixed connection is established between the driver part and the winding shaft.

In this context, a variant of the invention can consist in the driver part integrated into the force flow between the second clamping end of the torsion spring accumulator and the winding shaft being a driver sleeve that coaxially surrounds the device axis. This driver sleeve forms a fastening area for the rotationally fixed connection to the second clamping end of the torsion spring accumulator.

The coupling arrangement is designed in such a way that the outer end region of the device axis forms, as a primary coupling means, driver surfaces which can be disengaged in the axial direction, such as flats or the like, which interact with corresponding axially disengageable driver counter surfaces, the secondary coupling surfaces, which are provided in a central coupling recess of the driver sleeve.

Other features of the invention can be found in additional subclaims.

In the drawings, a preferred embodiment according to the invention is shown in more detail, it shows

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Fig. 1 is a side view of a winding device showing the essential components; the tubular winding shaft is shown only as a partial length and otherwise more schematically,
5

Fig. 2, omitting the winding shaft shown in Fig. 1, a longitudinal section along the section line II-II in Fig. 1,

Fig. 3, 4 and 5 Radial sections according to the section lines IH-III ₇ IV-IV and VV in Fig. 1 and

Fig. 6 and 7 are exploded spatial representations, roughly corresponding to the viewing direction arrows shown in Fig. 1 and labeled VI and VII.

In Fig. 1, a partially shown winding device is designated overall by the reference number 10. The winding device 10 has a tubular winding shaft 11 0 and a torsion spring motor designated overall by 12.

The torsion spring motor 12 has a device axis 13 and a torsion spring accumulator 14 designed as a helical spring, the first clamping end of which is designated E and the second clamping end of which is designated Z.

The first clamping end E of the torsion spring accumulator 14

is arranged in a rotationally fixed manner on the device axis 13, while the second clamping end Z of the torsion spring accumulator 14 is rotationally fixed to the winding shaft 11 in the manner to be described in more detail below.

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The inner end region of the device axis 13 is designated by I, while the outer end region of the device axis 13 bears the reference symbol A.
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The inner end region I of the device axis 13 is provided on the front side with a bearing arrangement 15 which is supported on the inner circumferential surface 16 of the winding shaft 11 in an axially displaceable manner.
10

The bearing arrangement 15 has a bearing pin 17 fastened to the front side of the inner end region I of the device axis 13 and a bearing shell 18 (Fig. 3) axially secured on the bearing pin 17 and connected to the winding shaft 11 in a rotationally driven manner.

The bearing pin 17 has an annular groove 19 formed in its outer surface, coaxial with its bearing pin axis (identical to the longitudinal center axis M of the arrangement), into which the bearing shell 18 engages for axial securing. The bearing shell 18 is provided with a radially and axially extending slot 20 so that the bearing shell 18 can be engaged in the groove 19 of the bearing pin 17. The bearing pin 17 and bearing shell 18 are expediently made of a plastic that has certain bearing properties and sufficient inherent elasticity.

The bearing shell 18 has an outwardly open axial groove 21 into which an inwardly projecting axial rib 34 or 35 of the winding shaft 11 engages. In this way, the bearing shell 18 is connected to the winding shaft 11 in a rotationally fixed manner, so

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that it can rotate by means of the bearing shell 18 on the bearing pin 17 which is held non-rotatably by the device axis 13.

The bearing shell 18 also has extensions 22 which extend approximately in the radial plane of the winding shaft 11 and are approximately leaf spring-like and are integrally formed, which are supported on the inner circumferential surface 16 of the winding shaft 11 in a slidable manner in the axial direction and thus center the bearing shell 18 with respect to the winding shaft axis (identical to the longitudinal center axis M).

The inner end region I of the device axis 13 forms driving surfaces at its front end, which consist of flattened areas 2 3 which are stamped into the metal device axis 13 in an approximately rib-like manner. The flattened areas 23 interact with corresponding driving surfaces 2 4 of a central recess 25 of the bearing pin 17 for rotational drive.

In addition, the bearing pin 17 forms a fastening area 2 6 for the rotationally fixed connection with the first clamping end E of the torsion spring accumulator 14 (helical spring). The circular cylindrical attachment 2 6 is gripped by the clamping end E in a force-locking and rotationally fixed manner. It is also possible to slightly melt the circular cylindrical attachment 2 6 gripped by the torsion spring accumulator in order to additionally bring about a positive connection between the first clamping end E and the circular cylindrical attachment 2 6.

The bearing pin 17 forms on its front side facing away from the torsion spring accumulator 14 approximately in the manner of a hexagon

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kants rotary driving surfaces 27. By means of the rotary driving surfaces 27, the torsion spring motor 12 can be wound up or tensioned in a manner to be described below.

A driver part in the form of a driver sleeve 28 that coaxially surrounds the device axis 13 is integrated into the force flow/3 between the second clamping end Z of the torsion spring accumulator 14 and the winding shaft 11. The driver sleeve 28 forms a fastening area 29 for the rotationally fixed connection to the second clamping end Z of the torsion spring accumulator 14. The fastening area of the driver sleeve 28 represents a circular cylindrical projection that is rotationally fixedly encompassed by the second clamping end Z of the torsion spring accumulator 14 (helical spring).

The outer end region A of the device axis 13 forms, as a primary coupling means, driver surfaces that can be disengaged in the axial direction χ in the form of embossed flat ribs 30, which interact with corresponding, axially disengageable driver counter surfaces 31 that are provided in a central coupling recess 32 of the driver sleeve 28.

The driver sleeve 28 has on its outer surface 33 two outwardly open axial grooves ₅₃ , into which an inwardly projecting axial rib 34, 35 of the winding shaft 11 engages.

The driver sleeve 28 has approximately leaf spring-like extensions 36 which protrude outward from its outer surface 33 and which, supported on the inner surface 16 of the winding shaft 11, center the driver sleeve 28 with respect to the winding shaft axis (identical to the longitudinal center axis M).

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With indentations (not shown) of the winding shaft 11, the two integrally formed leaf spring-like extensions 36 can simultaneously serve as barb-like locking means that prevent the driver sleeve 28 from being accidentally pulled out of the interior of the winding shaft 11.

The outer end region A of the device axis 11 is held in an end cap 40 (see Fig. 6 and 7) in a rotationally fixed manner and secured against axial displacement. For this purpose, the outer end region A of the device axis 13 has laterally stamped, radially projecting ribs 37 in a diametrically opposite arrangement, which interact with locking surfaces 38 arranged on the outside of the end cap 40 for the purpose of rotationally fixed reception. A known internally toothed fan washer 39 made of spring steel is used in particular to axially secure the device axis 13 with respect to the end cap 40.

From Fig. 6 and 7 it can be clearly seen that the driver sleeve 28 is composed of two identical shells 41 which form plastic injection molded parts. Each shell 41 has male-type locking means 42, 43, with which female-type locking means 44, 45 correspond.

From Figs. 6 and 7 it can also be seen that the inner end region I of the device axis 13 is axially fixed to the front side of the bearing pin 17 by means of an internally toothed spring steel axial locking fan washer 46.

To avoid unpleasant rattling noises, a slotted tube-like plastic tube with a cross-section of approximately &OHgr;

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Component 47 is snapped radially onto the device axis 13. The plastic component 47 therefore prevents the torsion spring accumulator 14 from striking the device axis 13.

The assembly and operation of the winding device 10 are explained as follows:

The torsion spring motor 12 shown in Fig. 2 is first wound up or tensioned. To do this, the device axis 13 is moved to the left in the axial direction x relative to the driver sleeve 28 so that the rib-like flats 30 (primary coupling means) of the device axis 13 come out of engagement with the counter recesses 31 (secondary coupling means) of the driver sleeve 28. Once this released coupling position has been reached, the driver sleeve 28 is secured against rotation and the torsion spring motor 12 is wound up at a certain number of revolutions by means of a rotary drive that engages the rotary driving surfaces 27 of the bearing pin 17.

As soon as the torsion spring accumulator 14 is wound up, the device axis 13 is moved to the right in the opposite direction to the axial direction x, so that the primary coupling means 30 and the secondary coupling means 32 are engaged again. In this way, the torsion spring motor 12 has received the potential energy it needs to operate. The wound up torsion spring motor 12 can be secured against unintentional unwinding and stored until it is used in production using simple temporary securing means, such as a clamp.

For its assembly, the wound torsion spring motor 12 is connected to the inner end region I of the device as shown in Fig. 2.

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ing axis 13 first in the axial direction χ into the interior of the winding shaft 11 until the collar 49 of the driver sleeve 28 strikes the front face 48 of the winding shaft 11. Before insertion, the bearing shell 18 and driver sleeve 28 are aligned with their axial grooves 21, 53 in relation to the axial ribs 34, 35. In this way, the bearing shell 18 and driver sleeve 28 are connected to the winding shaft 11 in a rotationally driven manner.

The end cap 40 is then pushed with its locking surfaces 38 over the ribs 37 formed on the outer end region A of the device axis 13, which is provided with a helical compression spring 50 and flanged bushings 51 for receiving the ends of the helical compression spring 50.

After removing the aforementioned temporary securing means, the end cap 40 is moved in the axial direction x against the restoring force of the spring 50 in order to insert the winding device 10 into the installation field on the motor vehicle side.

0 At the same time, the device axis 13 moves in the axial direction x, which results in the rib-like flattenings 30 (primary coupling means) moving to the left out of the counter recesses 31 (secondary coupling means) of the driver sleeve 28, so that the torsion spring motor 12 is activated. In this way, the material web (not shown) can be pulled out of the pull-out slot 52 of the winding device 10 by means of a handling edge against the torque of the torsion spring motor and releasably secured to the vehicle-side fastening points.

It should also be noted that/3 only one end region of the winding device 10 is shown in the drawings. The

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If the winding device 10 has only one torsion spring motor 12, the other end region can be provided with some kind of end cap-like rotary bearing, for example. In principle, however, it is also possible to construct the winding device 10 with the elements according to the invention as a double arrangement. It must be taken into account here that the direction of rotation of the two torsion spring accumulators 14 must be opposite.

Claims (23)

Peter Butz GmbH & Co. Verwaltungs\Jncj^-f!g3· · * ** - 14 - Claims 1. Winding device (10) for a material web of a restraint device or the like of a vehicle, such as a station wagon, with at least one device axis (13) which is held in a rotationally fixed and releasable manner on the installation field side, with a torsion spring accumulator (14) surrounding the device axis (13), the first clamping end (E) of which is fastened to the device axis (13) and the second clamping end (Z) of which is fastened adjacent to an outer end region (A) of the device axis (13) to a hollow winding shaft (11) which is mounted coaxially to the device axis (13) and accommodates the latter (13) and the torsion spring accumulator (14), on the outer surface of which the inner edge of the material web is held, wherein the outer edge of the unwound material web is to be releasably fastened on the vehicle side, characterized in that the device axis (13), with its inner end region (I) at the front, projects freely axially into the winding shaft (11), is arranged axially displaceable relative to the winding shaft (11), since/3 the first clamping end (E) of the torsion spring accumulator (14) is fastened to the inner end region (I) of the device axis (13), and since/3 the outer end region (A) of the device axis (13) has primary coupling means (30) which can be brought into or out of engagement with secondary coupling means (31) coupling the winding shaft (11) by axial displacement of the device axis (13) relative to the winding shaft (11). 2. Winding device according to claim 1, characterized in that in the force flow between the second clamping Peter Butz GmbH & Co. Management,-I|G· · * _t »' - 15 - end (Z) of the torsion spring accumulator (14) and the winding shaft (11) a driver part (28) is incorporated which is received by the device axis (13), which forms the secondary coupling means (31) and which can be inserted into the winding shaft (11) together with the device axis (13) and can be connected to it in a force-locking and/or form-locking manner in a rotationally fixed manner. 3. Winding device according to claim 1, characterized in that the inner end region (I) of the device axis (13) is provided with a bearing arrangement (15) on the front side, which is located on the inner surface (16) of the winding shaft (11) is supported axially displaceably. 4. Winding device according to claim 3, characterized in that the bearing arrangement (15) has a bearing pin (17) fastened to the end face of the inner end region (I) of the device axis (13) and a bearing shell (18) axially secured on the latter and secured against co-rotation in the winding shaft (11). 5. Winding device according to claim 4, characterized in that the bearing pin (17) has an annular groove (19) coaxial with its bearing pin axis (at M) and formed in its outer surface, in which the bearing shell (18) engages for its axial securing. 6. Winding device according to claim 4 or claim 5, characterized in that the bearing shell (18) can be snapped radially onto the bearing pin (17). Peter Butz GmbH & Co. Verwaltungs\jngg-i5G· ; · ,< - 16 - 7. Winding device according to one of claims 4 to 6, characterized in that the bearing shell (18) has an outwardly open axial groove (21) into which an inwardly projecting axial rib (34, 35) of the winding shaft (11) engages. 8. Winding device according to one of claims 4 to 7, characterized in that the bearing shell (18) forms approximately leaf spring-like extensions (22) extending in the radial plane of the winding shaft (11), which, supported on the inner circumferential surface (16) of the winding shaft (11), center the bearing shell (18) with respect to the winding shaft axis (at M). 9. Winding device according to one of claims 3 to 8, characterized in that the inner end region (I) of the device axis (13) forms at its front end driver surfaces (23), such as flattened areas or the like, which cooperate with corresponding driver surfaces (24) of a central recess (25) of the bearing pin (17) for rotational drive. 10. Winding device according to one of claims 4 to 9, characterized in that the bearing pin (17) forms a fastening region (26) for the rotationally fixed connection to the first clamping end (I) of the torsion spring accumulator (14). 11. Winding device according to claim 10, characterized in that the fastening area of the bearing pin (17) forms a circular cylindrical projection (26) and the torsion spring accumulator (14) forms a helical spring, the clamping end of which Peter Butz GmbH & Co. Management taS. I - 17 - (E) engages the circular cylindrical extension (26) in a force-fitting and rotationally fixed manner. 12. Winding device according to one of claims 4 to 11, characterized in that the bearing pin (17) is on or adjacent to its front side facing away from the torsion spring accumulator (14) forms rotary driving surfaces (27). 13. Winding device according to one of claims 1 to 12, characterized in that the force flow between the The driver part integrated into the second clamping end (Z) of the torsion spring accumulator (14) and the winding shaft (11) is a driver sleeve (28) coaxially surrounding the device axis (13).
15 14. Winding device according to claim 13, characterized in that the driver sleeve (28) forms a fastening region (29) for the rotationally fixed connection to the second clamping end (Z) of the torsion spring accumulator (14). 15. Winding device according to claim 14, characterized in that the fastening region of the driver sleeve (28) forms a circular-cylindrical projection (29) pointing towards the inner end region (I) of the device axis and the torsion spring accumulator (14) forms a helical spring, the second clamping end (Z) of which engages the circular-cylindrical projection (29) in a force-fitting, rotationally fixed manner. 16. Winding device according to one of claims 13 to 15, characterized in that the outer end region (A) of the device axis (13) as primary coupling means in the axial direction (at x) disengageable driver surfaces (30), such as Peter Butz GmbH & Co. Verwaltungs-KC. II .' » *..i\, Flattenings or the like, which interact with corresponding axially disengageable driver counter surfaces (31), the secondary coupling means, which are provided in a central coupling recess (32) of the driver sleeve (28). 17. Winding device according to one of claims 13 to 16, characterized in that the driver sleeve (28) has on its outer surface (33) at least one outwardly open axial groove (53) into which an inwardly projecting axial rib (34, 35) of the winding shaft (11) engages. 18. Winding device according to one of claims 12 to 17, characterized in that the driver sleeve (28) forms approximately leaf spring-like extensions (36) projecting outward from its outer surface (33) which, supported on the inner surface (16) of the winding shaft (11), center the driver sleeve (28) with respect to the winding shaft axis (at M). 19. Winding device according to one of claims 13 to 18, characterized in that the driver sleeve (28) is arranged in the winding shaft (11) both in a rotationally fixed manner and secured against axial displacement. 20. Winding device according to one of claims 1 to 19, characterized in that the outer end region (A) of the device axis (13) is accommodated in an end cap (40) in a rotationally fixed manner and secured against axial displacement. Peter Butz GmbH & Co. Verwaltungs-^Q 21. Winding device according to one of claims 13 to 20, characterized in that the coupling means (30, 31) can be disengaged from the driver sleeve (28) by moving the device axis (13) against the spring restoring force (at 50) in the direction (x). 22. Winding device according to claim 21, characterized in that the spring restoring force is formed by a spring (50), in particular by a helical compression spring, acting between the driver sleeve (28) and the end cap (40). ■ 23. Winding device according to one of claims 1 to 22, characterized by a double arrangement in which a device axis (13) with its inner end region (I) projects freely axially into the winding shaft (11) from each end opening (at 48) of the winding shaft (11), wherein both torsion spring accumulators (14) can be wound up and relaxed in opposite directions of rotation.