FR3045095A1 - TUBE ASSEMBLY FOR SHUTTER ROLLER SHAFT - Google Patents

Abstract

The invention relates to a set of tubes (10, 44), and a method of implementation for forming a winding shaft of a measured length. It comprises a first tube (10) of a first length and n second tubes of a second length, said first tube (10) and i second tubes, i being less than or equal to n, being fitted into each other by so that the sum of said first length and i times said second length is greater than said measured length and that the sum of said first length and i-1 times said second length is less than said measured length. Said first tube (10) has a longitudinal marking (20) of n winding shaft length measuring scales offset from each other by a value of length substantially equal to said second length.

Description

Tube assembly for rolling shutter winding shaft

The present invention relates to a set of tubes intended to be fitted respectively into each other to be able to form a rolling shutter winding shaft.

One envisaged field of application is, but not exclusively, that of the renovation of existing shutters, and more particularly, the transformation of a "manual" shutter, comprising a winding shaft of an apron. and a drive crank of the shaft, by a motorized roller shutter. As a result, the dimensions of the new motorized roller shutter are determined by the free space left by the previous one. It is then necessary to adapt the length of the winding shaft of the deck.

Also, it is proposed in the trade, sets with three tubes to be respectively fitted into each other to be able to form the winding shaft. If the required winding shaft length is between the sum of the lengths of two tubes and the sum of the lengths of three tubes fitted into each other, the three tubes are precisely fitted into each other and the first is sectioned to obtain the required length. In some circumstances, it is even necessary to proceed to a second section.

If this length is between the length of a tube and the sum of the lengths of two tubes fitted into one another, the two tubes are precisely fitted into one another and the first is cut. Finally, if the required length is less than the length of a single tube, it is cut accordingly.

Such a mode of implementation is relatively difficult and time consuming. It is indeed first of all to measure the distance between the two opposite supports of the ends of the winding shaft and deducting the useful lengths of the different ends and accessories, then to put the tubes into each other. the others in order to postpone the result of the measurement by a mark on the first tube to then be able to cut it, for example by means of a suitable saw.

The tubes are slidably slid inside each other and the postponement of the measurement, by means of a tape measure for example, on the first tube may include uncertainty. On the other hand, when the three tubes are fitted into each other, their range is relatively large and the whole can not be manipulated.

Also, a problem that arises and that aims to solve the present invention is to provide a set of tubes for forming more easily a rolling shutter winding shaft.

For this purpose, it is proposed a set of tubes to be fitted into each other to form a rolling shutter winding shaft of a measured length, said assembly comprising a first end tube having a first length and n second tubes each having a second length, said first tube and i second tubes, i being less than or equal to n, being intended to be respectively fitted into each other so that the sum of said first length and i times said second length is greater than said measured length and that the sum of said first length and M_ times said second length is less than said measured length, so as to be able to sever said first tube to obtain a winding shaft length equal to said measured length. Said first tube has a longitudinal marking of n winding shaft length measuring scales offset with respect to each other by a value of length substantially equal to said second length, so that it can be read directly on the i '. scale of said first tube the length of said first tube and said second tubes fitted into each other.

Thus, a feature of the invention lies in the implementation of a longitudinal marking, having n winding shaft length measuring scales offset relative to each other by a value of length substantially equal to the second length of second tube, so as to be able to choose the measuring scale corresponding to the number of second tubes to be inserted into each other and following the first tube, and to read directly on the first tube the length measurement for be able to saw the first tube. In this way, there is no need to postpone the tape measure on all the tubes fitted into each other to mark the first tube and proceed to sawing the first tube at said mark. The simple measurement of the length that extends between the two lateral supports of the shutter shaft, and the direct reading of this measurement on the only first tube, by choosing the corresponding measuring scale, makes it possible to saw the first tube to the right length without necessarily pushing all the tubes into each other. The only manipulation of the first tube makes the operation easier. In addition, the measurement scales advantageously include the subtraction of the length of the accessories and in particular the end-fittings to be fitted at the ends of the shaft.

Advantageously, said second tubes have a first effective portion and a second complementary connection portion of said first portion. The connecting portion of a second tube is a connecting portion which engages in the first tube, or in the effective portion of another second tube, opposite its second connecting portion. The connecting part is slidably mounted. Preferably, said second connecting portion has a length greater than a quarter of said first effective portion. In this way, the connecting portion of a tube can be more or less slid inside the first tube or another tube, without impairing the resistance of the winding shaft, so as to allow fine adjustment of the length of the shaft.

According to a particularly advantageous embodiment of the invention, said first effective part has a regular octagonal section. In this way, as will be explained below, the tubes can be linked in rotation when they are fitted into each other. Also, the winding shaft has flat longitudinal faces for easily attaching the end of the deck of a shutter. And yet, the cylindrical shape octagonal base allows a relatively continuous winding and smoothly apron.

In addition, said second connection portion has a concave dodecagonal section. The second part is obtained from a tube having a regular octagonal section which forms the first effective part, by deforming one face out of two. Indeed, one face in two is pressed radially and folded along a longitudinal median of the face. In this way, a radial approximation of the other faces is obtained, which then makes it possible to engage the second sliding part inside the effective part of another tube or in the first tube. Therefore, said second connecting portion advantageously has star bearing spans. These star bearing surfaces then come to rest flat, inside the effective part of another tube, against the inner faces of the effective part and one face on two. In this way, the second part can slide easily inside a first part while being perfectly integral in rotation.

According to an alternative embodiment, the second part is obtained from a tube also having a regular octagonal section by deforming only two faces. Advantageously, two diametrically opposite faces are deformed.

Advantageously, said first tube has two opposite free ends, and said longitudinal marking extends from one of said free ends to a given distance from the other of said free ends, in the decreasing direction of said length measuring scales. Thus, the first tube portion devoid of longitudinal marking is reserved for the junction with a second tube. And it does not require marking.

According to a particularly advantageous embodiment of the invention, said longitudinal marking is carried on said first tube by gluing a pre-printed adhesive tape of said n tree length measuring scales. In this way, it is easy to make the second tubes from first tubes, by locally deforming their end to form the connecting portion, and to reserve the first tubes to which the pre-printed adhesive tape is adhered.

Advantageously, the number of second tubes n is equal to two. And hence, the first tube has a longitudinal marking of two scales. According to another embodiment, the marking of the first tube also has another scale for measuring the length of the first tube. This feature allows to read directly on the first tube, the overall length of the assembled shaft, and to cut to the desired length, when the length of the winding shaft is less than that of the first tube.

According to another object, there is provided a method of implementing a set of tubes described above, for mounting a rolling shutter winding shaft, said method being of the type comprising the following steps: provides an assembly comprising a first end tube having a first length and n second tubes each having a second length; a winding shaft length is measured; said first tube and i second tubes are connected, i being less than or equal to n, respectively in each other so that the sum of said first length and i times said second length is greater than said measured length and that the sum of said first length and M_ times said second length is less than said measured length; and, severing said first tube to obtain a winding shaft length equal to said measured length. Said first tube has a longitudinal marking of n winding shaft length measuring scales offset relative to one another by a value of length substantially equal to said second length; and the first scale of said first tube is read directly on the length of said first tube and said tubes fitted into each other. Other features and advantages of the invention will appear on reading the following description of a particular embodiment of the invention, given by way of indication but not limitation, with reference to the accompanying drawings in which: Figures 1, 2 and 3 are schematic perspective views of tubes of a set of tubes according to the invention; - Figure 4 is a schematic front view of the elements shown in Figures 2 and 3 along the arrow IV; - Figure 5 is a schematic view of a set of tubes according to a first embodiment; - Figure 6 is a schematic view of a set of tubes according to a second embodiment; Figure 7 is a schematic detail view of a connection between the tubes shown in Figures 5 and 6; - Figure 8 is a schematic view showing an installation adapted to receive the set of tubes according to the invention; FIG. 9 is a schematic view of implementation of the invention according to the first embodiment illustrated in FIG. 5; and, - Figure 10 is a schematic view of implementation of the invention according to the second embodiment illustrated in Figure 6; and, - Figure 11 is a schematic view of a detail element of Figure 1.

FIG. 1 illustrates a first tube 10 of octagonal constant section and extending between a first end 12 and a second end 14. The total length of the first tube 10 between the first end 12 and the second end 14 is, according to the method of FIG. implemented implementation, of 990 mm. The octagonal section of the first tube 10 is such that the distance between two opposite faces, 16, 18 is substantially 60 mm.

In addition, the first tube 10 has a longitudinal marking 20 extending, on an outer face 22, from the first end 12 to a point 24 located at a distance from the second end 14. The longitudinal marking 20 is made by gluing an adhesive tape 26 which will be described in detail with reference to FIG. 11. The longitudinal marking 20 printed on the adhesive tape 26 has a single graduation having large marks 28 and small marks 30 spaced 50 mm apart respectively. each other, and two measuring scales opposite one another, a first 32, a second 34, with respect to a center line 36. The first measurement scale 32 starts at 1100 mm from a first a large reference mark 38, to end at 1600 mm at a last major mark 40. The second measuring scale 34 begins at 1700 mm from the first major mark 38, to end at 2200 mm at the last major mark 40. From the d the smallest scale values, the end of the adhesive strip is located substantially 145 mm from the first major mark 38, while on the opposite side, on the side of the largest scale values, the end of the adhesive tape is located substantially 115 mm from the last large mark 40. Also, the side of large scale values, a pictogram 42 symbolizing a bin is printed, and one side of the center line 36 corresponding to the first scale of measurement 32, is printed "two-pipe shaft", while the other side of the center line 36 corresponding to the second scale 34 is printed "three-pipe shaft >>. The role of this pictogram and these impressions will be explained in greater detail in the rest of the description. It will also be observed that the measurement scales 32, 34 are offset from one another by a value of 600 mm.

Referring again to FIG. 1, it is observed that the adhesive strip is bonded to the outer face 22 so that its end located on the side of the largest scale values coincides with the first end 12 of the first tube 10, while that the opposite end of the adhesive strip 26 coincides with the point 24 located at a distance from the second end 14. It will be observed that the longitudinal marking 20 can also be printed directly on the outer face 22 either by etching or more easily thanks to an inkjet printing.

Figures 1 and 2 show the same second tube 44. The two second tubes 44 thus shown and the first tube 10 shown in Figure 1, constitute the set of tubes according to the invention and they are presented in kit form.

The second tube 44 extends here along a length of 850 mm. It has a first effective portion 46 of a length close to 550 mm and whose section is identical to that of the first tube 10. It has a second connecting portion 48 with a length substantially equal to 260 mm. Between the first effective portion 46 and the second connecting portion 48, an intermediate zone 50 extends over a length of about 50 mm.

The second connecting portion 48 is made from a tube having a constant section over its entire length and by impressing a longitudinal depression of four faces among the eight faces, along a median fold line 52. Around the tube, one face on two is thus deformed.

FIG. 4 shows an end view of the second tube 44 from its connecting portion 48. Thus, in the background, the first effective portion 46 is shown, and in the first plane the connection portion 48. Thus, among the eight faces of the second tube 44, one out of two is radially deformed in the connecting portion 48 along the median fold line 52. Thus, a concave dodecagonal section is obtained, where four of the faces, originally all identical, are folded longitudinally around the median fold line 52 and transformed respectively into two half-sided retracted. This transformation also has the effect of bringing the four other faces radially closer to each other and thus being able to fit the connection part 48 inside an effective part 46 of the other second tube 44 or inside. of the first tube 10.

Thus, in FIG. 7, the connecting portion 48 of a second tube 44 is fitted inside the first tube 10. Due to the length of the connecting part, it is possible to adjust the longitudinal relative position of the two tubes 10, 44 while maintaining sufficient strength to form a winding shaft as will be explained below.

Thus, as illustrated in FIG. 5, it is possible to fit into each other a second tube 44 and a first tube 10. Or, as illustrated in FIG. 6, it is possible to adjust a first second tube 44 in the first tube 10 and a second second tube 44 in the first second tube 44. It is understood that it is then possible to produce a winding shaft having two different lengths.

An advantage of the invention is then to be able, from this set of tubes to determine the number of tubes to be assembled and the length of the first tube 10 to be cut to be able to form a winding shaft to the desired length.

Thus, Figure 8 schematically illustrates a space 54 inside which is housed a winding shaft and an apron. The length of the winding shaft is given by the distance X which separates on one side the motor support 56 and on the other the opposite support 58.

According to the example presented here, if the distance X is between 1050 mm and 1700 mm, two tubes are reserved, the first tube 10 and one of the second tubes 44. By grasping the first tube 10, as illustrated in FIG. 9, it is oriented so as to read the first measuring scale 32 extending from 1100 mm to 1600 mm, and the mention "two-tube shaft". Then one comes to read, on the first scale of measurement 32, the distance X as measured. The first tube 10 is then sawed at the distance X read, and the portion of the first tube 10 having the representative pictogram of a trash can be discarded.

Then, the second tube 44 is fitted inside the first tube 10 to form the winding shaft. It then has the length corresponding to the distance X as measured.

If the measured distance X is between 1700 mm and 2500 mm, the three tubes, the first tube 10 and the two second tubes 44 are reserved. The first tube 10 is then grasped as illustrated in FIG. 10, and it is oriented so as to be able to read the second measuring scale 34 extending from 1700 mm to 2200 mm, and the mention "tree with three tubes". Then one comes to read, on the second scale of measurement 34, the distance X as measured. The first tube 10 is then sawed at the distance X read, and the portion of the first tube 10 having the pictogram representative of a trash can be discarded.

One of the second tubes 44 is then inserted inside the first tube 10 and then the other of the second tubes 44 inside said one of the second tubes 44, so as to form a winding shaft having a corresponding length. at the distance X measured.

The marks 28, 30 are at least 50 mm apart. However, the inaccuracy of reading in this limit is largely offset by the possibilities of translational adjustment of the tubes relative to each other due to the length of the connecting portion 48 of the second tubes 44.

The embodiment of the set of tubes shown in the Figures, with specific dimensions, can quite be transposed to a set of tubes having larger or smaller dimensions. In addition, the number of tubes envisaged here is not limiting.

Claims (10)

A set of tubes (10, 44) to be fitted into each other to form a rolling shutter winding shaft of a measured length, said assembly comprising a first end tube (10) having a first length and n second tubes (44) each having a second length, said first tube (10) and i second tubes, i being less than or equal to n, being intended to be fitted respectively into each other so that the sum of said first length and i times said second length is greater than said measured length and that the sum of said first length and M_ times said second length is less than said measured length, so as to be able to section said first tube (10) to obtain a winding shaft length equal to said measured length; characterized in that said first tube (10) has a longitudinal marking (20) of n measuring scales (32, 34) of winding shaft length offset with respect to one another by a value of substantially equal length. at said second length, so as to be able to read directly on the ith scale of said first tube (10) the length of said first tube (10) and said i second tubes (44) fitted into each other. 2. Tube assembly according to claim 1, characterized in that said second tubes (44) have a first effective portion (46) and a second connecting portion (48) complementary to said first portion (46). 3. Tube assembly according to claim 2, characterized in that said second connecting portion (48) has a length greater than one quarter of said first effective portion (46). 4. A set of tubes according to claim 2 or 3, characterized in that said first effective portion (46) has a regular octagonal section. 5. Tube assembly according to any one of claims 2 to 4, characterized in that said second connecting portion (48) has a concave dodecagonal section. 6. Tube assembly according to claim 2, characterized in that said second connecting portion (48) has star bearing spans. 7. tube assembly according to any one of claims 1 to 6, characterized in that said first tube (10) has two opposite free ends (12, 14), and in that said longitudinal marking (20) extends one of said free ends (12) to a given distance (24) from the other of said free ends (14), in the decreasing direction of said length measuring scales (32, 34). 8. Tube assembly according to any one of claims 1 to 7, characterized in that said longitudinal marking (20) is carried on said first tube (10) by gluing a pre-printed adhesive tape (26) of said n scales of measuring (32, 34) shaft length. 9. Tube assembly according to any one of claims 1 to 8, characterized in that n is equal to two. 10. A method of implementation of a set of tubes according to one of claims 1 to 9, for mounting a rolling shutter winding shaft, said method being of the type comprising the following steps: - is provided an assembly comprising a first end tube (10) having a first length and n second tubes (44) each having a second length; a length of winding shaft is measured; said first tube (10) and second tubes (44) are connected, i being less than or equal to n, respectively in each other so that the sum of said first length and i times said second length is greater than at said measured length and that the sum of said first length and M_ times said second length is less than said measured length; and, cutting said first tube (10) to obtain a winding shaft length equal to said measured length; characterized in that said first tube (10) has a longitudinal marking (20) of π winding shaft length measuring scales offset from each other by a value of length substantially equal to said second length, and in that the first scale of said first tube (10) is read directly from the first tube (10) and said tubes (44) fitted into each other.