FR2713614A1 - Winding cylinder for laying out temporary screen between two spaces used e.g to contain dogs or animals in car - Google Patents

Abstract

A winding cylinder (3) has its principal axis as the rotation axis has a return for a band of flexible material (4). A casing (1) surrounds the winder leaving a slot (15) through which the band slides. The casing rotates relative to the rotating axis of the winder (21). The rotation (R1) of the casing relative to this axis is independent of the rotation (R3) of the roller relative to the same axis. The rotating axis of the winder and of the casing is fixed. The casing is formed from a hollow cylinder (11), closed by two circular section ends.

Description

WINDING DEVICE COMPRISING A WINDER WITH
REMINDER FOR BAND OF FLEXIBLE MATERIAL AND A HOUSING
SURROUNDING THE REEL AND HAVING A SLOT
THROUGH WHICH SLIDES THE BELT.

 The invention relates to a winding device comprising a reel with return for strip of flexible material, the purpose of which is to set up a temporary screen between two volumes, and a casing surrounding the reel and having a slot through which slides said strip, intended in particular for tendelets that are found in automobiles: sun shades, separation nets for dogs, luggage cover tendelets, etc. In this field, the winding devices must constitute a compact, presentable, solid assembly protected from any external gene.

 Winding devices intended for such functions are well known on the market.

 They generally consist of a winding rod and a cylindrical casing having a slot for the passage of the strip wound on the rod arranged inside along the same main axis as that of the fixed casing, which rod has 'a degree of freedom of rotation relative to the casing along this main axis. The wound strip has at its end a rigid tip which allows good grip of the end of the strip and which limits the winding stroke of said strip.

This design has two drawbacks:
- rapid wear of the flexible material strip on
the edges of the slot of the fixed casing.

- a protrusion of the rigid end of the strip
flexible which may not be desirable in
certain constructions insofar as it can
be hung or torn, for example by
luggage in a car trunk.

 The object of the invention is to remedy the above drawbacks and relates to a winding device comprising a reel, the axis of rotation of which is the main axis, with a reminder for a strip of flexible material, the object of which is to erect a temporary screen between two volumes, and a casing surrounding the reel and having a slot through which said strip slides, characterized in that the casing is mounted to rotate relative to the axis of rotation of the reel, the rotation of the casing relative to this axis being independent of the rotation of the reel relative to this same axis.

 According to a preferred embodiment, the axis of rotation of the reel and the casing is a fixed axis.

 According to an advantageous characteristic, the casing is of generally cylindrical shape, with guide zones of circular section at the ends.

 According to an alternative embodiment, the casing consists of a hollow cylinder, closed by two end pieces of circular section, integral with said cylinder, the rotary connection being exerted between these end pieces and the fixed axis of rotation of the reel and the casing.

 According to another alternative embodiment, the device comprises two flanges, a flange being disposed at each of the two ends of the fixed axis of rotation, which flanges are fixed relative to the axis and have a peripheral region in which are rotatably mounted respectively a first and a second end region of the casing cylinder.

Other characteristics and advantages will emerge from the description below of the appended drawings, given by way of nonlimiting examples, in which:
- Figure 1 is a sectional view along II (see
Figures 3 to 4) illustrating the principle of the device
winding according to the invention, in a variant
in which the housing is a closed hollow cylinder
at its ends by two end pieces, rotatably mounted
on the fixed axis;
- Figure 2 is a sectional view along II (see
Figures 3 to 4) illustrating the principle of the device
winding according to the invention, in a variant
in which two flanges are fixedly mounted on
the axis and ensure the guiding of the form casing
cylindrical at its ends;
- Figures 3A and 3B are sectional views along
II-II (see Figures 1 and 2) of the device
winding;
- Figure 4 is a sectional view along II-II (see
Figures 1 and 2) of the winding device;
- Figure 5 is a sectional view along III-III
(see Figure 6) of one end of the device
winding according to the invention;
- Figure 6 is a sectional view along II (see
figure 5) of one end of the device
winding according to the invention;
- Figure 7 is an exploded view of the device
winding according to the invention.

 The winding device according to the invention is formed of a fixed assembly 2, of a winding assembly 3 rotatably mounted on this fixed assembly 2, of a tendelet or any other strip of flexible material 4 wound around the winding assembly 3 and a casing 1 provided with a slot 15 for passage of the tendelet 4, containing the winding assembly and rotatably mounted on this fixed assembly 2.

 The fixed assembly 2 comprises a fixed axis 21. In an alternative embodiment, this axis is embodied by at least one portion of metal or non-deformable plastic rod, with which the connecting members cooperate. In the embodiment of FIGS. 5, 6, 7 the function of the fixed axis 21 is ensured by means of a centering lug 23, 24 of the fixed assembly 2.

 The winding assembly, shown schematically in FIGS. 1 and 2, consists mainly of a non-deformable winding rod 31, itself made up of a hollow cylinder having a pinching mechanism not shown of the strip of flexible material 4 and of rotary connecting members 37 disposed at the ends of said cylinder, and mounted so that the fixed axis 21 is the axis of rotation for the winding assembly 3, coinciding with its axis main.

 A return spring 33, disposed between the rod 31 and the fixed axis 21 restores the wound position of the strip 4 when no force is exerted on its free end.

It is optionally provided with a rigid tip 42 over its width to facilitate gripping and to limit the winding stroke when the system is not integrated into a support.

 According to a first alternative embodiment illustrated in FIG. 1, the fixed assembly 2 consists of a fixed axis 21. The casing 1 consists of a hollow cylinder 11, comprising in particular a slot 15 in the direction of its length. This hollow cylinder 11 is closed at its two ends respectively by two walls 16, serving as end pieces, in the section planes of said cylinder. These walls 16 each have in their central region a rotary connecting member 17, mounted in such a way that the fixed axis 21 serves as an axis of rotation for the casing 1.

 According to a second alternative embodiment illustrated in FIG. 2, the fixed assembly 2 consists of a fixed axis 21 at the ends of which two flanges 22 are fixed respectively, which flanges 22 have a peripheral region in which the two ends of the cylinder are rotatably mounted 11 of housing 1.

 In both variants, the components of the winding device can be made of metal or plastic resistant to deformation, with the exception of the springs. They are obtained in the case of metal by cutting, bending, bending, welding or stamping, or even by molding. They are obtained, when it comes to plastic, by molding and gluing.

 Figures 5, 6 and 7 show an embodiment in detail. In the construction described, the winding device is composed of a casing 1, two fixed end pieces 2, a winding rod 3, a tendelet 4 and connecting and return members arranged at the ends .

 A winding rod 31, consisting of a hollow cylindrical aluminum profile, has along its length, a means for hooking an end of a tendelet 4, formed of a canvas, a strip of flexible material or of a rectangular net 41, the width of which is less than the length of the rod. Said tendelet is intended to be wrapped around the rod.

 This rod 31 has, in its cavity, a straight groove 35 over its entire length and a depth less than the thickness of the sheet metal constituting the profile. The function of this groove is to guide the translation of a part 32 described below.

 A casing 1 comprises a hollow cylinder 11, consisting of a curved sheet, provided with a slot 15, not shown in FIGS. 5 and 6 and disposed along the length of the cylinder along one of its generatrices. The slot allows the tendelet 4 to pass through the casing. The diameter of the hollow cylinder 11 is adapted to the capacity of the rod 31 and to the thickness of the strip of flexible material 41 of the tendelet 4 wound around said rod 31.

 Two cylindrical rings 12, of molded plastic material are assembled at the two ends of the hollow cylinder 11, by screwing, deep drawing, clipping or preferably, by gluing. These two rings 12 have the function of guiding the rotation of the hollow cylinder 11.

They form with the cylinder 11, a casing 1.

 Connecting members for these parts are arranged at each end of the winding device where the mechanism is similar. Indeed, said device is symmetrical with respect to a plane orthogonal to its main axis, located in the middle of its length. We will therefore limit ourselves to the description of the mechanism at one end, which implements a fixed end piece 2, a connecting member for this end piece 2 with the rod 31, comprising a driver 32 and a return spring 33 and a connecting member of this same nozzle 2 with the casing 1.

The fixed end piece 2 consists of a cylindrical piece of molded plastic, consisting mainly of three cylindrical portions with the same main axis, the axis of the reel:
- The first portion 23, end and more
small diameter, is assembled at one end of a
helical return spring 33 whose function
is explained below;
- The second portion 24, central and of diameter
medium, is intended for connection with the rod
winding 31, to which it serves as a support
and of centering, therefore of guide in its rotations;
- The third portion 25, end and more
large diameter, is intended for connection with the
housing 1. The end ring 12 of the housing 1
cooperates with a peripheral rib 26 of the
portion 25, via a groove on
its inner part, so that said
portion 25 of the fixed end piece 2 serves as a support and
centering, therefore of guide for the rotation of the casing
1.

On the other hand, a stop 27 makes it possible to limit the
angular arrangement of the ring 12, therefore of the
slot 15, between two separate extreme positions
of an angular sector a. For this purpose, the thickness
of the ring 12 is lower on this sector
angular a, so as to avoid the stop as long as
this thickness is opposite. To the
ends of this angular sector, the thickness
widens, and the ring has a face,
orthogonal to the cylinder section planes and
in a plane containing the fixed axis 21, which face
comes into abutment against element 27, preventing the
crankcase rotation beyond.

A driver 32, consisting of a molded plastic part, of generally cylindrical shape, with a main axis coinciding with the fixed axis 21, has two portions:
- The first portion, end and smaller
diameter, is assembled at the other end of the
helical return spring 33;
- The second portion, has a slightly diameter
less than the inside diameter of the rod 31 of
so that the coach 32 slides in the
rod 31 in a guided translational movement
by a lug 36, disposed on the periphery of this
portion and which slides in the groove 35 of the
rod 31.

 In this way, the spring 33 is disposed on the one hand at the end portion 23 of the fixed end piece 2, and on the other hand at the portion of small diameter of the driver 32.

The driver 32 has a degree of freedom of translation relative to the rod 31 which facilitates mounting.

 When mounting the device, the spring 33, assembled at one of its ends to the fixed end piece 2, at the other end to the driver 32, is inserted with said driver in the rod 31. Said spring is tensioned in torsion by rotation of the rod 31 relative to the fixed end piece 2, which gives the element 32 a translational movement, directed by the groove 35 in the rod 31, under the effect of variations in length of the spring . Consequently, the winding assembly 3, to which the strip of flexible material 41 is wound, in a direction which increases the moment of return as the strip 41 unwinds, is assembled to the casing 1.

 The free end of the strip of flexible material is passed through the slot 15 of the casing and a nozzle 42 is fixed at this end over the width of the strip 41. In the winding phase under the effect of the return spring 33 , the inertia of the tendelet 4, and more particularly the rigid end piece 42 in abutment against the edges of the slot 15 of the casing 1, drives said casing in an angular arrangement in which the rings 12 are in abutment at the ends of the angular sectors a .

 Figures 3.A, 3.B describe the use of this winding device.

 The winding device thus designed allows an infinite number of angular positions of the slot 15.

 The rotation R1 of the casing 1 is independent of the rotation R3 of the winding assembly.

 Thus when the user pulls on the rigid end piece 42 of the tendelet 4 in a direction D1, it causes an angular displacement al of the casing 1 because the latter is positioned naturally so as to minimize the components, perpendicular to the plane of the tendelet 4, the efforts it undergoes.

 Likewise, when the user pulls on this tendelet in the direction D2, it causes an angular displacement a2 of the casing 1. This simple system makes it possible to remove the tangential stresses which would apply to the tendelet 4 if the casing 1 was fixed. In addition, the tendelet 4 can be used in all directions permitted by the mobility of the casing 1.

 Figure 4 shows an assembly of the assembly on a support 50, which allows a retraction against one of the walls 51 of this support 50, the rigid end piece 42 of the tendelet 4 wound around the winding rod 31 recalled in this position called wound by the torsion spring 33, although the direction D of traction for use is opposite.

 When no traction is exerted by the user on the tendelet 4 the torsion spring 33 causes the tendelet 4 to be wound up until the arrival of the rigid end piece 42 on the winding zone. Since this rigid end piece 42 cannot be wound, it is rotated tangentially to the wound tendelet and its race stops when it abuts against the wall 51 of the support 50. The casing 1 follows the movement imposed on it by the assembly of the tendelet 4 consisting of the strip of flexible material 41 and the end piece 42.

 In this configuration, the device is protected against accidental maneuvers, the end piece 42 running the risk of offering a pull-out in winding devices whose casing 1 is fixed and whose slot is oriented towards the direction D of traction .

Claims (5)

 in relation to this same axis.  independent of the rotation (R3) of the reel by  rotation (R1) of the housing relative to this axis being  relative to the axis of rotation of the reel (21), the  characterized in that the housing (1) is rotatably mounted  (15) through which said strip (4) slides,  (1) surrounding the reel (3) and having a slot  a temporary screen between two volumes, and a housing  strip of flexible material (4), the purpose of which is to straighten  the axis of rotation is the main axis, with reminder for  their accessories, comprising a reel (3), of which CLAIMS: 1. Winding device, intended for vehicles and 2. Winding device according to claim 1,  characterized in that the axis of rotation (21) of  the reel (3) and the casing (1) is a fixed axis. 3. winding device according to claim 2,  characterized in that the casing (1) is shaped  general cylindrical, with guide zones of  circular section at the ends. 4. winding device according to claim 3,  characterized in that the casing (1) consists of a  hollow cylinder (11), closed by two end caps (16) of  circular section, integral with said cylinder (11), the  rotary link (17) acting between these end pieces (16)  and the fixed axis of rotation (21) of the reel and the  casing. 5. Winding device according to claim 3,  characterized in that it comprises two flanges (22), one  flange being disposed at each of the two ends of the fixed axis (21) of rotation (R1, R2), which flanges (22) are fixed relative to the axis (21) and have a peripheral region in which are rotatably mounted respectively a first and a second end region of the cylinder (11) of the casing (1).