FR2525577A3 - Dispenser for lengths of wallpaper from roll - has hollow cylinder with axial slot to receive length and sprung pivot plate holds end in slot - Google Patents

Abstract

The dispenser is for feeding measured lengths of wall-paper (12) from a roll. It stores a roll from which material is drawn off, measured and cut. Four freely rotatable rollers on fixed parallel axles in a trough formation may be used to store the roll, an intermediate group of rollers e.g. serving to guide the drawn off strip via measuring gear, past cutters and onto a receiving cylinder (61). The cylinder may be hollow with a through axle (63), using a longitudinal wall slot (62) to admit the leading end of the strip (12). An 'L' section plate (67,68) fixed to the axle by its apex may hold the end in the cylinder and may be fixed to the inside cylinder wall by a spring (69), a pivoting key (70) engaging a notch (72) serving to lock the cylinder with the slot open.

Description

 The present invention relates to dispensers of packaged web material such as wall fabric or wallpaper.

 Typically, said web-like fabric web material is wound on a hollow cylindrical support, such as a cardboard support. In the remainder of the description, to simplify the disclosure, this hollow cylindrical support of the roll will be called cardboard roll, without this expression being considered as limiting, such a hollow cylindrical support can of course be made for example based on material synthetic.

 The tape material dispensers that have hitherto been proposed have many disadvantages.

 In particular, the means provided for supporting the roll of web material to be dispensed are generally formed of two pins to be threaded axially into the ends of the cardboard support of the roll of web material.

Such pins can not give full satisfaction, in particular because of the lack of standardization of cardboard supports and rolls of web material, which affects both the diameter of the cardboard support of the roll, the length of this support, as well as the initial diameter. of the roll of web material.

 In an attempt to avoid the above-mentioned drawbacks, it has been proposed that the roll media support means consist of two support rollers mounted on a linkage, the axes of the support rollers being parallel to the geometric axis of the roll, and the linkage being controlled so that the distance between the axes of the two support cylinders is reduced in proportion to the decrease in the diameter of the roll of material in a band.Such a solution would of course be able to give satisfaction on the technical level, it does not remain less than in practice, this solution can not be implemented due in particular to its com, exite related to the structure of the linkage and has sought to use means sensitive to the diameter of the roller to control accordingly the dépiac & ent of the linkage.

 On the other hand, the means for receiving a predetermined quantity of strip material to be dispensed were hitherto formed of a hollow cylindrical support of cardboard or synthetic material which was supported by means of two pins for be introduced axially into the ends of said hollow cylindrical support.

 In addition to the substantial cost of such hollow cylindrical supports, this proposal required large stocks of supports adapted to each width of strip material to be dispensed.

 The need has been felt for many years to have a device dispenser tape rolled, which is both simple, robust and economical, and can be implemented easily.

 The present invention now proposes a novel device for dispensing strip material, packaged in a roll, which completely solves the aforementioned drawbacks.

 The dispensing device according to the present invention comprises support means for the roll of web material to be dispensed, guide and return means capable of directing the web material towards receiving means of the web material which is to be dispensed. , cutting means disposed upstream of the receiving means and measuring means for determining the amount of web material received by the receiving means.

 More specifically, the receiving means comprise a hollow receiver cylinder provided along its entire length with a slot in which is intended to be inserted one end of the web material to be dispensed, a locking member housed inside the hollow receiving cylinder and adapted to clamp the strip material against an edge of the slit of the slave cylinder, as well as drive means capable of driving the rotating slave roll to wind strip material thereon.

 Such an arrangement makes it possible to overcome completely the use of a hollow cylindrical support, as was the case in the state of the art.

 According to a preferred embodiment, the receiver cylinder is mounted free to rotate about an axis cooperating with said drive means, the locking member is formed of a pallet supported by the axis, substantially perpendicular to that- ci, while there is provided elastic means between the pallet and the receiving cylinder, to solicit the pivoting of the receiving cylinder with respect to the axis so that the pallet comes into locking position relative to the receiving cylinder.

 According to an alternative embodiment, there is provided a lug pivotally mounted on the axis of the receiving cylinder, and adapted to cooperate with a corresponding recess provided on the receiving cylinder to immobilize it relative to the axis in a position such that the pallet is moved away from its blocking position.

 Preferably the axis of the receiving roll is supported at each end by two rotating support rollers so that said receiving roll can easily be installed and removed.

 According to a characteristic of the present invention, the receiver cylinder is mounted free to pivot about an axis, on the one hand, at one end via a disk, on the other hand, at the other end, via a recessed disk, supported by the receiver cylinder in a position such that said recess is located opposite said slot, so that the web material which has been wound on the receiving cylinder can easily be removed from it, when the locking member is carried out of its locking position, by longitudinal traction on the strip material, the side of the hollow disc.

 More specifically, the support means of the roll of web material to be dispensed comprise at least three cylindrical supports whose axes are parallel and fixed, the support cylinders being free to rotate about their respective axes, two support cylinders having their axes located substantially in the same horizontal plane, while at least one third support cylinder is disposed below the two previous, in the off-center position with respect thereto.

 Such an arrangement makes it possible to support all types of rolls of strip material, whatever the diameter of the rollboard support, the length of this support, as well as the initial diameter of the roll of strip material.

 According to a preferred embodiment, the support means of the roll of web material to be dispensed comprise four support cylinders whose axes are parallel and fixed, the support cylinders being free to rotate about their axes, the two upper support cylinders, the most remote, having their axes located substantially in the same horizontal plane, while the other two support cylinders are arranged below the two previous decentered with respect to them, and with their respective axes in different horizontal planes.

 According to a feature of the present invention, the distance between the two upper support cylinders, the furthest apart, is slightly less than the initial diameter of the roll of web material, while the distance between the lower support rolls is close to the diameter of the empty roll of material in tape.

 According to another characteristic of the present invention, the two upper support cylinders are provided with longitudinally adjustable stops.

Other features and advantages of the present invention will appear on reading the detailed description which follows, and with reference to the appended drawings which must be considered as incorporated into the description by the reference made to them here, and on which
FIG. 1 represents a schematic view in vertical cross section of a dispensing device according to the present invention,
FIG. 2 represents an enlarged view of the portion of the device referenced II in FIG. 1,
FIG. 3 represents a side view of a receiver cylinder according to the present invention,
FIG. 4 represents a view of the receiving cylinder of FIG. 3 in the direction referenced IV in FIG. 3;
FIG. 5 represents a cross-sectional view of the receiving roll of FIG. 3,
- Figure 6 shows a partial view in perspective of a support cylinder according to the present invention.

 As shown in FIG. 1, the roll-fed web material dispensing device according to the present invention comprises means for supporting the roll 10 of web material to be dispensed, means 40 for guiding and returning suitable for directing the web material to receiving means 60 for the material to be dispensed, and measuring means 90 for determining the amount of web material received by the receiving means 60.

 Preferably, the device also comprises cutting means (not shown in Figure 1) arranged upstream of the receiving means.

 There is shown in Figure 1 the hollow cylindrical support 11, cardboard, or synthetic material, on which is wound the strip material 12, such as wall fabric or wallpaper.

 The support means of the roll 10 of web material to be dispensed according to the present invention will now be described in greater detail.

 As shown in Figure 1 the support means 20 comprise four support cylinders 21, 23, 25 and 27, the axes 22, 24, 26 and 28 are parallel and fixed.

Said pins 22, 24, 26 and 28 of the support cylinders are supported by the flanges of the device, such as the fae l schematically shown in Figure 1, the aidde of any suitable means, such as by crimping, welding, screwing. .. The support cylinders 21, 23, 25 and 27 are mounted Zabres rotation about their respective axes 22, 24, 26 e 28
The two upper support cylinders 21 and 23 have their axes 22 and 24, located spatially in the same horizontal plane. Moreover, the distance between these two upper support cylinders 21 and 23 is slightly smaller than the initial diameter of the roll 10 of strip material. such that said roll 10 initially rests on these two support cyllndnas 21 and 23.

 As shown in FIG. 1, the two other support cylinders 25 and 27 (the closest) are disposed below the two preceding ones (21, 23) and in the off-center position with respect thereto. the support cylinders and e 27 have their respective axes in different horizontal planes; according to the embodiment shown, the support cylinder 25 has its axis 26 higher than the axis 28 of the support cylinder 27.

 The distance between the lower support rolls 25 and 27, and preferably the distance between the support rolls 27 and 23, is close to the diameter of the roll 11 of web material.

 Thus, initially, the roll 10 of web material is placed on the upper support rolls 21 and 23; when the diameter of the roll 10 becomes smaller than the distance between the support rolls 21 and 23, the roll 10 bears on the roll 25; when the diameter of the roll further decreases, the roll 10 is then carried by the rolls 25 and 27 or the rollers 27 and 23, depending on the force exerted on the roll 10.

 Insofar as the distance between the two lower support cylinders 25 and 27 is slightly greater than the diameter of the empty roll of strip material, it is understood that the latter can fall between the rollers 25 and 27. Such a fall is however without notorious effect on the unwinding of the strip of material 12, insofar as this fall can occur only when the amount of material 12 remaining on the roll 11 is low.

 Of course, the number of support rolls (21, 23, 25, 27) can be varied, taking into account the dimensional variations of the roll of web material.

 As shown in Figure 6, at least one support cylinder, and preferably the two upper support cylinders 21 and 23 are provided with stops 31 longitudinally adjustable.

 More specifically, the stops 31 are formed of a cylindrical portion 29 with a diameter greater than the diameter of the corresponding support cylinder, and a ring-shaped flange 30 fixed to said cylindrical portion.

 It is understood that by displacement of the cylindrical portions 29 on the corresponding support cylinder, one can easily change the distance between the two flanges 30 which constitute stops and adapt this distance to the length of the roll 10 of web material.

 The stops 31 are then immobilized in position by means of any suitable conventional fastening means (not shown), such as pressure screws or any other equivalent device.

 Incidentally, the two abutments 31 can be urged closer together by means of suitable elastic members, without it being necessary to provide means for fixing the abutments 31 on the support cylinders, the distance between the two abutments 31 being automatically adapted to the length of the roll 10 by elastic biasing.

 By way of nonlimiting example, for a roll 10 of web material with a maximum diameter of 500 mm, wound on a cardboard support 11 with a diameter of the order of 50 mm, the support rollers 21 to 27 can have a diameter of the order of 50 mm, the distance between the upper support cylinders 21 to 23, be of the order of 300 mm and the distance between the support cylinders 25 and 27 on the one hand, and 27 and 27 23 on the other hand, be between 60 and 100 mm approximately.

 As shown in FIG. 1, the distance separating the upper support cylinder 23 from the support cylinder 27 is greater than the distance separating the upper support cylinder 21 from the support cylinder 25. This makes it possible to provide flanges 30 forming a larger stop on the support cylinder 23 only on the support cylinder 21; on the other hand, the unwinding direction, as shown in FIG. 1, is determined in such a way that the roll 10 of web material is urged in displacement towards the support cylinder 23 having the larger-diameter collars 30, such that said roll 10 is properly guided.

 The guide and deflection means 40 comprise firstly a group of two rollers 41 and 43 arranged above the support means 20. The strip material 12 passes between said rollers 41 and 43. To do this, the guide roller 41, lower, its axis 42 supported fixed by the flanges (1) above the device, against the pressure roller 43, greater, its axis 44 can be moved in a corresponding opening 2 formed in said flanges.

 Of course each of the rollers 41 and 43 is rotatably mounted about its respective axis 42 and 44.

 More specifically, the opening 2 formed in the flanges consists of a first section 3 of substantially vertical extension, the upper part of which opens a second section 4, oblique to the first, and inclined downwards.

It is thus understood that when the axis 44 of the roll 43 rests in the opening section 4, the strip material 12 can easily be introduced between the rollers 41 and 43. On the other hand, when the axis 44 of the roll 43 rests on the bottom of the section
3 opening, the material 12 is closely
rollers 41 and 43.

The guide means 40 also comprise a
guide roller 45 on which the strip material 12 passes after
be passed between the guide roller 41 and the pressure roller 43,
guide roller 45 whose axis 46 is supported fixed by the flasks
devices in a position such as the ener
upper roller 45 is flush with a table 5 substantially hori
on which the strip material rests 12. The roll
The purpose of the guide 45 is to prevent the strip material 12 from being
deteriorated by the edge of said table 5 and provides guiding
of the band 12.

 Preferably, there is provided on the table 5 cutting means (not shown) as well as guide means for them, so as to guarantee a rectilinear section perpendicular to said strip material 12.

As shown in FIG.
90 are provided on the table 5 to determine the quantum
Tape material 12 received by the receiving means 60.

In a conventional manner, such measuring means
may consist of a wheel 91 resting on the material
in band 12, and which cooperates with a not shown display device.

Preferably, the cutting means are arranged
side of the guide roller 45 relative to the measuring means 90
so that the amount of web material available
downstream of these, and therefore likely to be wound on the receiving means 60, as will be described in more detail in
following the description, can be easily determined,
knowing the diameter of the wheel 91 and the number of turns
performed by the latter during the scrolling of the material 12.

Finally, the means 40 for guiding and returning
a guide roller 47 disposed at the outlet of the table 5, this is
that is to say opposite the guide roller 45 mentioned above.

The axis 48 of the guide roller 47 is supported fixed by
the flanges (1) of the device in such a position that the lower generatrix of the guide roller 47 is flush with the surface of the table 5. Thus, the strip material 12 envelops the guide roller 47 from below and is returned substantially, vertically, upwards, towards receiving means 60.

Of course, the guide roller 47 is rotatably mounted about its axis 48.

 The receiver means 60, as shown in FIGS. 2 to 5, will now be described in greater detail.

 Receiving means 60 comprise a hollow receiver cylinder 61 provided over its entire length with a nr 62 in which is intended to be inserted end of the web material 12 to be dispensed, as shown in FIG. 5.

 To do this, the width of the slot 62 must of course be greater than the thickness of said strip material 12.

 The receiving cylinder 61 is pivotably mounted around a cylindrical axis 63i on the one hand, at one end, via a disc (not shown) threaded onto the axis 63 and secured to the cylinder 6i. on the other hand, at the other end, by means of a hollow disc (not shown) threaded onto the axis 63 and supported by the receiving roll 61 in a position such that the recess of the disc is located opposite said slot 62.

 According to an advantageous embodiment, the hollow disc consists of an opening ring sector substantially equal to 2700, however other variants of implementation may be adopted for the hollow disc.

 As will become more clearly apparent from the following description, this arrangement makes it possible to easily remove the strip material 12 wound on the receiving cylinder 61 by exerting an axial traction on said material, on the hollowed-off disc side, the recessed portion. of the disk allowing passage of the portion of web material 12 previously inserted in the receiving cylinder 61 through the slot 62.

As shown in FIG. 2, the axis 63
of the receiving cylinder is supported at each end by two
support rollers 6 and 7 rotatably mounted around their axes
respective fixed 8 and 9 carried by the flanges of the device.

To do this, it is planned a cut in the
flanges (1), adapted to allow the passage of the axis 63 / and the cy
lindre receiver 61 is shorter than axis 63, so
that the receiver cylinder 61 can be introduced between
two flanges of the device, while the axis 63 rests on the
support rollers 6 and 7.

To avoid the longitudinal displacement of the axis 63,
this one carries at least one end, preferably side
70, two crowns 64, 65, as shown in FIG.
figure 3 whose spacing is slightly greater than the Thick-
peels 6 and 7 above, so that these crowns
They can supervise these.

Such an arrangement allows to install and reti
easily the receiver cylinder 61 on the device.

In addition, according to the present invention, there is provided, housed inside the hollow receiver cylinder 61, a locking member 66 adapted to clamp the material in a conical strip.
be an edge of the slot 62 of the receiving cylinder 61.

More specifically, as shown on the
5, the locking member 66 is formed of a suppor pallet
the aforementioned axis 63, substantially perpendicular thereto.

More precisely, the puck-te 66 can be
consisting of a straight section section "L" supported by
the axis 63 at the junction line between the two branches
67 and 68 of said profile.

The first branch 67 is intended to pinch the ma
strip 12 against the edge of the cylinder slot 62
receiver 61.

To do this, the other branch 68 of the "L" section is
connected to one end of a tension spring 69 whose other end is connected to the inner wall of the receiving roll 61, so that the tension spring 69 provided between the pallet 66 and the receiving roll 61 urges the pivoting of the latter relative to the axis 63, so that the pallet 66 comes to the locked position relative to the receiving cylinder, that is to say that the pallet 66 clamps the strip material 12 against the edge of the slot 62 of the receiver cylinder 61.

 The pallet 66 may extend over the entire length of the receiving roll 61 or incidentally on only some portions thereof.

 Preferably, there is provided an elastic member 69 at each end of the receiving roll 61.

 Of course, the traction spring 69 may be replaced by any functionally equivalent means.

 As shown in Figures 3 and 4, there is further provided a pin 70 pivotally mounted -parallel to the axis 63 about an axis 71, as schematically represented by the arrow referenced A. t'ergot 70 is intended to cooperate with a recess 72 corresponding formed on the receiving cylinder 61 in a position such that when said lug 70 is inserted into the recess = 72, the pallet is moved away from its locking position, as shown on Figure 5.

 Of course, here again the pin 70 can be replaced by any functionally equivalent devices.

 The pin 70 and the corresponding recess 72 are intended to keep the pallet away from the slot 62 so that the strip material 12 can easily be introduced into the slot 62.

 On the other hand, there are provided driving means (not shown) which cooperate with the axis 63 of the receiving cylinder 61 so as to drive it in rotation and thereby the receiving cylinder 61 for winding the web material 12 on the receiver cylinder 61.

 Preferably, as shown schematically in FIG. 5, by the arrow B referenced, the direction of rotation of the axis 63 is chosen so that the rotation of the axis 63 tends to reinforce the locking position of the web material by pinching the pallet 67 against the edge of the slot 62.

 Said drive means may be formed either of a simple manually operated crank or a mechanized device.

 Of course, the drive means preferably sero, provided on the axis 63 on the opposite side to the hollow disc threaded on it, so that said drive means do not interfere with the withdrawal of the material wound on the receiver cylinder 61.

 The method of using the dispensing device according to the present invention will now be described.

 It is first necessary to dispose a roll 10 of strip material on the support cylinders 21 to 27 and to adjust the distance between the stops 31 provided on these, as a function of the length of the roll 10.

 The strip material is then inserted between the guide roller 41 and the pressure roller 43, directed on the guide roller 45, placed on the table 5 and introduced between the latter and the wheel 91. After being returned by the guide roller 47, the end of the strip material 12 is introduced into the slot 62 of the receiving roll 61, the lug of which has been introduced beforehand into the recess 72. The lug 70 is then remote from the recess 72, such that so that the pallet 66 blocks the web material, and the driving means of the axis 63 are actuated. When the measuring means 90 indicate that the adequate amount of material has passed under the wheel 91, the drive means are stopped and the cutting means actuated. The drive means are then reactivated to finish winding the web material. Receiving means 60 are then disassembled from the device and the web material wound on the receiver cylinder withdrawn from it by axial traction.

 Preferably, the cutting means are spaced apart from the measuring means 90 by a distance corresponding to the length of strip material 12 introduced into the receiver cyikirre 61, since this length of strip material esX may be deteriorated by the pallet 66 who is pinching it.

 To restart the operation, it suffices to put the receiver means back into position and reintroduce the end of the strip material into the annular groove 62 of the cylinder.

 It will thus be understood that the roll 10 of strip mat can easily and quickly be changed to meet the demand, without the need for a dispensing device for each type of roll.

 Of course, the present invention is not limited to the embodiments which have just been described but extends to all variants that are in keeping with the spirit of the invention.

 Thus, it may further be provided pins, preferably carried removable by the flanks of the disposztif, and intended to support rollers 10 of web material1 whose dimensions meet specific standards, said pins being disassembled when the rollers do not meet not to these standards, so that the rollers 10 are then carried by the support cylinders 21 to 27.

Claims (10)

 1.Device dispensing device in packaged strip, characterized by the fact that it comprises  - Support means (20) of the roll (10) of web material (12) to be dispensed,  - means (40) for guiding and returning capable of directing the web material to  receiving means (60) of the web material which is to be distributed,  cutting means arranged upstream of the receiving means and  measuring means (90) for determining the quantity of material. in band received by the receiving means.  2. Dispensing device according to claim 1, characterized in that the receiving means (60) comprise a hollow receiving cylinder (61) provided along its entire length with a slot (62) in which is intended to be inserted an end of the belt material (12) to be dispensed, a locking member (66) housed inside the hollow receiver cylinder and adapted to clamp the strip material against an edge of the slot (62) of the slave cylinder, as well as driving means adapted to drive the rotating receiver roll to wind strip material thereon.  3.Dispositif distributor according to claim 2, characterized in that the receiving cylinder (61) is rotatably mounted about an axis (63) cooperating with said drive means, in that the locking member (66) is formed of a pallet supported by the axis (63) substantially perpendicular thereto and in that resilient means (69) are provided between the pallet (66) and the cylinder (61) receiver for biasing the slave cylinder (61) relative to the axis (63) so that the pallet (66) comes to the locked position relative to the receiving cylinder (61).  4.Dispositif dispenser according to claim 3, characterized in that there is provided a pin (70) pivotally mounted on the axis (63) of the receiving cylinder (61) and adapted to cooperate with a recess (72) corresponding arranged on the receiving cylinder (61) to immobilize it relative to the axis (63) in a position such that the pallet (66) is spaced from its locking position.  5.Dispositif distributor according to one of claims 1 to 4, characterized in that the axis (63) of the receiving cylinder (61) is supported at each end by two rollers (6,7) rotatable supports, so that said slave cylinder (61) can easily be installed and removed.  6. Dispensing device according to one of claims 1 to 5, characterized in that the receiving cylinder (61) is mounted free to pivot about an axis (63i, on the one hand at one end, via a disc, on the other hand, at the other end, via a hollow disc, supported by the receiving roll (61) in a position such that said recess is located opposite the said slot (62).  7.Dispositif distributor according to one of claims 1 to 6, characterized in that the support means (20) of the roll (10) of strip material (12) to be dispensed, comprise at least three support cylinders (21, 23,25,27) whose axes (22,24,26,28) are parallel and fixed, the support cylinders being free to rotate about their axes, and in that two support cylinders (21,23) have their axes (22, 24) located substantially in the same horizontal plane, while at least one third support cylinder is disposed below the two previous, in the off-center position with respect thereto.  8. Dispensing device according to claim 7, characterized in that the support means (20) of the roll (10) of web material (12) to be dispensed comprise four support cylinders (21,23,25,27) whose axes (22,24,26,28) are parallel and fixed, the support cylinders being free to rotate about their axes and in that the two most distant upper support cylinders (21,23) have their axes (22, 24) located substantially in the same horizontal plane, while the two other support cylinders (25, 27) are arranged below the two preceding ones, decentered with respect to these and with their respective axes (26, 28) in different horizontal planes.  9. Device according to one of claims 7 and 8, characterized in that the distance between the two upper support cylinders (21,23) furthest away is slightly smaller than the initial diameter of the roll (10) of material, while the distance between the lower support rolls (25,27) is close to the diameter of the empty roll (11) of web material.  10. Device according to one of claims 7 to 9, characterized in that the two upper support cylinders (21,23) are provided with stops (31) adjustable longitudinnent.