LU88590A1 - Protection structure - Google Patents

Description

Protective structure The invention relates to a protective structure, provided with a support member for supporting a canvas roll on which a canvas or similar protective element is to be wound and unwound, the canvas roll having to be this effect set in rotation by means of a drive motor connected to the canvas roller cooperating with a regulating member which, during the winding of the canvas, stops the engine when the engine has performed a defined number of turns when rolling up the canvas or similar protective element.

When winding a canvas or a protective element or similar screen of a protective structure, for example a blind or molar tent of the type described above, the problem arises that the canvas or the screen or the like is subjected to stretching and shrinking due to atmospheric conditions, while dirt may also be present on the canvas. These varying conditions make it impossible to guarantee that a canvas or similar screen is completely wound up on the canvas roll, in the desired manner, when the engine is stopped. Another risk is that when the canvas is completely wound, the motor continues to be powered and possibly burns The object of the invention is to obtain a protective structure of the aforementioned type, in which it is possible to overcome this drawback.

According to the invention, this object can be achieved by the fact that the output shaft of the engine is coupled to a transmission member provided with a thread, this thread cooperating with a complementary thread which is disposed on a second transmission member connected to the canvas roller, the two transmission members being able to slide relative to each other against the thrust of a spring.

When using the structure according to the invention, it is possible to adjust the number of revolutions that the engine must make before stopping, so that in practice it will always be guaranteed that the fabric will be completely wound. In general, the fabric will thus already be completely wound before the engine has completed the necessary number of turns. When the structure according to the invention is used, if the canvas is fully wound, the canvas roller can no longer be driven further, due to the resistance exerted on the canvas, but the two transmission members will slide relative to each other over a distance, against spring thrust, until the engine is disconnected.

By using the protective structure according to the invention it is possible, using simple means, to obtain a safe winding and unwinding of a canvas or similar screen to be wound on a roller for canvas, so as to always ensure a correct winding canvas or screen or the like. The invention will be explained in more detail below using a few embodiments shown and schematically · 4 in the accompanying figures.

The figure shows a part of a canvas roller with a drive motor installed therein, Figure 2 shows a section along the line II-II of Figure 1, Figure 3 shows a part of the transmission mechanism between the motor and the roller for canvas, FIG. 4 schematically represents an embodiment of a protective structure, FIG. 5 schematically represents a side view of an embodiment of a similar protective structure, FIG. 6 shows on a larger scale a part of the protective structure shown schematically in FIG. 5, FIG. 7 gives a plan view of FIG. 6, partially in section, FIG. 8 represents the roller for the fabric of the structure protection of Figures 5-7, partially in section, Figure 9 shows one end of the canvas sleeper of the protective structure of Figures 5-8, Figure 10 shows a section through an arm of the structure; of protection shown in Figures 5-9, with a support for fixing this arm, and Figure 11 shows a side view of Figure 10. In Figure 1 is shown in section part of a roller for fabric 1, which can for example be part of a blind or a similar protective structure, and which will for the most part be disposed in a protective box, not shown in detail, fixed for example to a wall of a building, so that the canvas roller can rotate around its longitudinal axis 2.

In the canvas roller 1 is taken up a tube 3 concentrically surrounded by the canvas roller, this tube being mounted near one end, in a support ring 4 surrounding the tube 3 and pressed into the roller 1 on a part of his lohgüeur.

As shown in more detail in Figure 3, in the wall of the tube 3- are made two holes 5 arranged in diametrically opposite positions, which are each configured symmetrically with respect to a plane sharing the tube 3 through the middle, and passing through the middle of the corresponding hole 5, the width of which gradually decreases from one end to the other. The purpose of these cutouts 5 will be explained in more detail below.

A drive motor in the form of an electric motor 6, taking a fixed position during normal use of the awning or the solar tent, is arranged in the nozzle 3. The motor can be stopped using 'an organ ; of; regulation 7, for example after having - I · performed the number of turns required to rewind the fabric on the fabric roller 1 from the fully unwound state. Such a regulating and regulating member is known per se, and should therefore not be described in more detail here. To determine the number of revolutions of the engine, the regulating member cooperates with the tube 3 which is rotated by the engine as described below. The output shaft 8 of the motor 6, of non-cylindrical shape, is inserted into a cutout of corresponding shape, which is formed in the end of a shaft 9 whose axis coincides with the axis 2 of the roller for canvas. At its periphery, the shaft 9 is provided with two keyways 10 arranged in diametrically opposite positions. The part of the shaft 9 which is located in the tube 3 is surrounded by a transmission member 11 which has more or less the shape of a threaded rod, and which is therefore provided at its periphery with a thread 12. A its inner periphery, the threaded rod is provided with keys 13rqui · engage in the grooves for keyway 10, so that the transmission member 11 can I, slide along: 1 shaft in the longitudinal direction of the tree 9, but cannot rotate relative to this tree.

One end of the transmission member 11 projecting from the tube 3 is carried by a transmission member 14, of annular shape, disposed against the end of the tube 3, and an internal bore of which is provided with a thread complementary to the thread 12 The annular transmission member 14 is prevented from rotating relative to the canvas roller 1. Around 11 end of 11 shaft 9 projecting from the ttfbe 3 and the transmission member 14 of annular shape!, Is installed a helical compression compression spring 15 / which is immobilized between the end of the transmission member 11 and an immobilization ring 16 disposed on the end of the shaft 9.

As still shown in FIG. 1, near one end of the transmission member 11, on the outer periphery of the transmission member 11, keys 17 are formed which are housed in the cutouts 5.

When using the structure according to the invention, the motor 6 can be put into operation for the winding of the fabric. The motor 6 will rotate the shaft 9 and therefore the transmission member 11 and the tube 3. At the start, the spring 15 will prevent the transmission member 11 from sliding along the shaft 9 and the member transmission 11 will drive the transmission member 14 and therefore the canvas roller 1, so that the canvas will be wound on the canvas roller. At some point, it may be that the canvas is fully wound, and the continuation of the winding of the canvas and therefore the continued rotation of the roller for canvas 1 prevented, for example by the fact that a canvas cross or similar, installed at the end of the canvas opposite the canvas roller, abuts against fixed stops. The adjustment will be such that the motor 6 will then not yet have made the preset number of turns, and will therefore not yet be disconnected by the regulating member 7. Like the transmission member 14 in the form of a nut is blocked, while the transmission member 11 driven by the motor continues to rotate, due to the threads 12 of the outer periphery of the transmission member'll and the complementary threads inside the nut 14 l 'transmission member 11 will move to the right of Figure 1, on the shaft 9, against the action of the' spring 15. Thus, the motor 6 can still rotate on one !; certain angular distance after the Λ roller 1 has been retained, and before the motor 6 is disconnected.

The keys 17 could be guided in grooves made in the wall of the tube 3, and extending parallel to the axis 2 of the tube 3. In the embodiment of the structure, the keys 17 on the contrary move along surfaces guide formed by the side edges of the cutouts 5 which, as shown in Figure 3, in top view of the tube 3, form an angle with the surface passing through the axis 2. Therefore, "when sliding the transmission member 11, to the right in FIG. 1, the tube 3 will be slightly turned back relative to the direction of rotation, whereby, for a smaller displacement of the transmission member 11 in the longitudinal direction of the canvas roller 1, the motor can rotate at a greater angle than if the keys were guided parallel to the axis 2. Thanks to the use of V-shaped cutouts, this embodiment is equally suitable for mounting on the left end than for mounting on the right end of the canvas roll, unlike an embodiment in which instead of V-shaped cutouts 5, grooves would have been installed example rectilinear, left or right pitch in the wall of the tube.

The drive structure described above is not only particularly suitable for winding fabrics from the sun blinds or tents usually used, but also for example for winding canvas a structure of the type shown diagrammatically in FIG. 4.

As shown schematically in Figure 4 (see also Figure 8), this is a protective structure with a canvas roller 18 at the ends of which two belt pulleys 19 and 20 are fixed. The canvas is here attached to the canvas roller at one end, and at the other end to a canvas cross member 21 shown in dotted lines. The ends of a drive belt 22 are fixed to the canvas cross-member, this drive belt being guided around deflection rollers 24 and 25, and through the canvas cross-member 21 along deflection rollers 23 The ends of the belt 22 are fixed to the pulleys for the belt 19 and 20. The embodiment is such that, during the unwinding of the canvas from the canvas roller, the belts 22 and 23 are wound on the pulleys for "! belt 19 and 20, while during the winding of the fabric, during which" the fabric cross member 21 is pulled again towards the roller for fabric 18, the belts 22 and 23 are unwound from the pulleys for belts 19 and 20.

Such a protective structure is for example used in so-called greenhouses where, as shown schematically in Figures 5-7, a roller for canvas is taken up in a protective box 26, and the crosspiece for canvas 21 is guided by its ends along guide beams 27 connecting to the protective box 26 and extending more or less horizontally, while guide beams 28 of the web cross member 21, extending downward and s' pressing for example on the ground by a lower end, are moreover connected to the ends of these guide beams 27 remote from the protective casing 26.

It will be clear that, during the winding and unwinding of the canvas, it cannot be guaranteed that, for example during the winding of the canvas the belts will be fully unwound, and conversely that when the belts are completely wound up the canvas will also be completely unwound, since variations may also appear here in the winding and unwinding. In this case also, the structure described above can be successfully used.

As shown in more detail in Figure 8, inside the tube 18 of the canvas roller is again installed a coupling tube 29 surrounded concentrically by the canvas roller 18, in which a motor drive 30 is arranged fixed. The belt pulley 20 is fixed to one end of the coupling tube 29 projecting from the canvas tube. i î At the inner end of the coupling tube 29, is arranged! a connecting piece 31 which has 4 J. I; "a non-circular hole in which is inserted the output shaft 32; .motor 31, of corresponding cross section. ' In the connection piece 31, is also inserted the end of a shaft 33 which is provided with... 1 at its outer periphery of keyways, similar to the shaft 9 of the previous embodiment example. The end of the shaft 33 is fixed to the connecting member 31 using a pin 34, by means of which the connecting member 31 is also fixed to the coupling tube; 29. The shaft: 33 is surrounded by a tube 35 forming a transmission member, which is provided on the outside with a thread corresponding to the thread of the transmission member 11 of the first embodiment. The transmission member 35 rests at one end in a sliding part 36 disposed in the roller for canvas and forming a transmission member, which is provided with an internal thread corresponding to the thread of 1 transmission member 35. In the transmission member 36 is formed a groove 37 in which is arranged the part of the roüleâ u for canvas 18 constituting the channel part 38 for taking up the end of the canvas, so that the transmission member cannot rotate relative to the roller for canvas.

On the side remote from the transmission member 36 is mounted a compression spring 39, disposed around an extension1 of the shaft 33 and pressed against the end of the transmission member 35, which is immobilized between the spring compression and the end of a connecting tube! 40, surrounding the end of the shaft 33 and fixed to the shaft 33 using a pin 41. If desired, the tube 40 can be further supported in one or more places by rings d 'support 41 arranged in the roller for; canvas. The end of the tube 40 remote from the shaft 33 is taken up in: a connection plug 42 / disposed in the end of the canvas roller and fixed on the tube 40, and on which the pulley 19 with belt is fixed.

The canvas roller described above can be taken up in the protective box 26 such as in particular shown diagrammatically in FIG. 6.

As shown more particularly in FIG. 7, supports 43 to which the ends of the arms 27 are coupled are fixed to the ends of the protective box r '26. The arms 27 are thus coupled with a hinge to the supports 43 using studs 44 vertically crossing the shaft of the canvas roller, and in the normal use position shown in Figures 5-7, they are prevented from rotating around the studs 44 using screws 45. Guide rollers 46 of the belt 22 are also arranged in the supports 43.

As further shown in Figure 9, the ends of the cross member for canvas 21 are fixed. * / guide rollers 47 with the aid of which the canvas cross member is guided along the arms 27 and 28. In addition, at the ends of the canvas cross member 21 are projecting supports 48, the ends of which are distant from the .'it. ends of the fabric cross-member have a semi-circular path for guiding the belt 22 which, as already indicated above, extends inside the fabric cross-member and inside of arms 27 and 28.

As the arms 27 are hinged to the casing 26 by means of the studs 44, and moreover the arms 27 and 28 are preferably also coupled to each other so that the arm 28 can be tilted up against the arm 27, from the position indicated in Figure 5, l] the arms 27 and 28 folded 1 'against each other for transporting the protective structure from i'usi-ne' up to the point of use, can be folded parallel to the canvas roller 18, against the box 26. In general, there will be sufficient play in the hinges so that the different arms rest one above ! the other and parallel to the longitudinal direction of the canvas roller. If necessary, one can instead arrange the hinge pins 44 slightly oblique, to be able to ensure the arrangement of the arms one above the other.

Thanks to this! T pivoting coupling of the arms 27 and 28 on the casing 26, the protective structure can be assembled completely at the factory, so that at the place of assembly it suffices to pivot the arms 27 and 28! r in the desired position relative to the protective box 26, and to fix the protective structure on the building or the like.

For fixing the protective structure described above, it is expedient to make use of the support members shown in Figures 10 and 11. As shown in Figure 10, the arm 27 has in cross section a substantially rectangular shape and in a corner of the profile where two walls arranged perpendicularly to each other connect to each other in a curved part, there is a groove 49 accessible from the outside of the profile, in the shape of a T in section transverse and extending in the longitudinal direction of the arm.

A coupling piece 50, the cross section of which is L-shaped, can then be tightened in the position shown in solid lines in Figure 10 and in the position 50 'shown partially in Figure 10 in dotted lines, in the using screws 51 and nuts 52 arranged in the groove 49 and cooperating with these screws 51. At one end of the coupling member 50, an arm 54 is coupled by one end to the end of the part% · '50 coupling using a pin 53 extending perpendicular to the longitudinal direction of the arm 27. The arm 54 can be pivotally brought into a desired position relative to the coupling member 50, and be immobilized in the desired position using a bolt 55. A: the end of the arm 54 which is distant from the coupling piece 50, an arm 57 is pivotally coupled using a pin 56 extending parallel to the shaft 53. 'Le. arm 57 can be immobilized in a desired position using a bolt 58.

In the 'position of the support member formed by the parts 50, 54 and 57 shown in Figures 10 and 11, the arm 27 can be fixed above a support beam or the like. The height position of the arm 27 relative to the support beam or the like can then be defined by the pivoting of the arms 54 and 57.

In the position of the support member shown in dotted lines in FIG. 10, the beam 27 can be fixed on the lateral side of a support beam or the like. Here also, an appropriate distance can be adjusted between the arm 27 and the corresponding support beam supporting the arm 27, by pivoting the parts 54 and 57.

If the fabric is to be wound up using the motor 30, hj the fabric roller 18 will be rotated using the motor 30. At the start, the fabric roller 18 will be driven through the two members transmission 35 and 36 gui pendaht 11 winding the canvas on the canvas roller 18 will not rotate relative to each other. When the fabric is completely rolled up, in general the motor 30 will still continue to rotate a little, as described above. The transmission member 15 will then slide relative to the transmission member 36, in opposition to the action of the force of the spring 39. The belts 20 can thus still be unrolled somewhat. \ ï- V 'I -

Claims (12)

1. Protective structure, provided with a support member, for supporting a canvas roll on which a canvas or similar protective element must be wound and unrolled, the canvas roll having to be rotated for this purpose using a drive motor connected to the canvas roller and cooperating with a regulating member which, when winding the canvas, stops the motor after the motor has made a defined number of turns during the winding of the fabric or similar protective member, characterized in that the motor output shaft is coupled to a transmission member provided with a net, this net coming into engagement with a complementary net which is formed in a second transmission member connected to the canvas roller, the two transmission members being able to slide relative to each other against the thrust of a spring. 2. Protective structure according to claim 1, characterized in that the transmission member driven by the motor is installed so as to be able to slide on a shaft driven by the motor, against the action of a spring. surrounding the tree but so as not to be able to rotate relative to this tree. * · I 3. Protective structure according to claim 1 or 2, characterized in that the transmission member driven by the motor is provided at its outer periphery with a}. net which cooperates with a net which is formed in a bore produced in the transmission member connected to the canvas roller. 4. Protective structure according to one of the preceding claims, characterized in that the transmission member driven by the engine is surrounded by a "·" tube which cooperates with a stationary regulating member, with a view to disconnecting the engine when the engine has achieved the desired number of revolutions, and in that the transmission member i is provided with a key arranged in a cutout made in the tube and s1 extending in the 'Λ longitudinal direction of the tube. 5. Protective structure according to claim 4, characterized: in that the cutout has an edge cooperating with the key and forming an angle with the axis of the tube. (» 6. Protective structure according to claim 5, characterized: in that the cut in the wall of the tube has the shape of a V, and in that its longitudinal axis is arranged in a diametral plane passing through the axis of the tube. 7. Protective structure according to one of the preceding claims, characterized in that near ^ at least one end of the canvas roller is arranged a belt pulley secured to the motor shaft, to which coupled a belt which is at the same time coupled to an end of the fabric remote from the canvas roller, so that the belt which is unwound from the belt pulley when winding the canvas on the canvas roller, and conversely that the belt is wound on the belt pulley during the unwinding of the canvas from the canvas roller. 8. Protective structure according to claim 7, characterized · in that near the two ends of the canvas roller is disposed a belt pulley driven directly by the motor. 9. Protective structure, in particular according to one of the preceding claims 7 and 8, characterized in that, near the ends of a support taking up the canvas roller, arms are installed for guiding a cross member for canvas installed on the free end J "of the canvas or similar screen, these arms being hinged at a hinge, by their end located near the support of the canvas roller, at said support using dfaxes hinge crossing at least / jf $ approximately perpendicular 1 axis of the canvas roller, so that the arms can thus be placed in positions at least approximately V ·? i parallel to a canvas roller. t. : \ 10. Protective structure according to claim 9, characterized; in that at the ends of the arm remote from the support structure of the canvas roller are arranged other arms for guiding the ends of the canvas cross-member, these arms being able to be brought in • 'i pivot relative to to the former, from a service position in; which arms form an angle with each other to a position where the arms are located in positions at least approximately parallel to each other. 11. Protective structure according to claim 9 or 10, characterized in that on the ends of the web sleeper are arranged guide members for the belt driven through the web sleeper. 12. Protective structure, in particular according to one of the preceding claims 9-11, characterized in that on the outside of an arm of the protective structure is arranged a coupling piece having in cross section the general shape of 'A L, a coupling arm which can be adjusted at the end of a branch of this coupling part, using a hinge pin, and which can be immobilized in a desired position, while at the end of the coupling arm which is remote from the coupling part, a second (coupling arm is arranged so as to be able to pivot and to be immobilized in a desired position relative to the first coupling arm, this second coupling arm being intended for fixing to a support structure, and the coupling part and the arm of the protective structure being made so that the part coupling could be re fixed in a first position i · -3 on the arm of the protective structure, in which the branch carrying the coupling arms is located below the arm of the support structure, and in a second position in which the branch of the coupling piece carrying the coupling arms extends the r'l! along a lateral bjord of the arm of the protective structure. j $; fi I * ί I ïl 4