[0001] The present invention refers to a machine for working fabrics and to a system for
introducing fabric in fabric working machines comprising at least one fabric braking
assembly supplying a fabric working machine.
[0002] Some fabric working machines are known, the as for example digital printing machines,
which require that the fabric supplied thereto is suitably stretched: fabric supplying
system are therefore necessary, which take into account the type of fabric to be supplied
(elastic fabric which can and must be stretched, fabric not to be stretched but from
which possible folds must be removed, etc.) and which take care of stretching the
copings to supply to the working machines.
[0003] Various type of fabric supplying machines to fabric working machines are known in
the art, which take care of centering the fabric itself. The known supplying machines
are in general composed of a centering and enlarging roller of the fabric and a series
of dancer rollers or load cells to keep the longitudinal tension of the entering fabric.
In order to suitably stretch the fabric, means are further necessary which remove
the folds from the fabric itself, tending the copings. It is however necessary that
the means operate immediately adjacent to the working means of the machines, thereby
resulting cumbersome and making possible intervention and/or maintenance operations
on the machines difficult and scarcely practical.
[0005] Therefore, object of the present invention is solving the above prior at problems,
by providing a fabric working machine and a system for introducing fabric in fabric
working machines comprising at least one fabric braking assembly supplying fabric
working machines, which allow stretching the fabric copings more efficiently and easier
working and/or maintenance operations.
[0006] The above and other objects and advantages of the invention, as will result from
the following description, are obtained with a fabric working machine as claimed in
claim 1. Moreover, the above and other objects and advantages of the invention are
reached with a system for introducing fabric in fabric working machines as claimed
in claim 9.
[0007] Preferred embodiments and non-trivial variations of the present invention are the
subject matter of the dependent claims.
[0008] It is intended that all enclosed claims are an integral part of the present description.
[0009] It will be immediately obvious that numerous variations and modifications (for example
related to shape, sizes, arrangements and parts with equivalent functionality) can
be made to what is described, without departing from the scope of the invention as
results from the enclosed claims.
[0010] The present invention will be better described by some preferred embodiments thereof,
provided as a non-limiting example, with reference to the enclosed drawings, in which:
- Figure 1 is a schematic side view of the fabric braking assembly according to the
present invention;
- Figures 2a and 2b show schematic side views of a preferred embodiment of a machine
for working a fabric comprising a braking assembly according to the present invention
respectively in two operating positions thereof;
- Figures 3a and 3b show schematic side views of another preferred embodiment of a machine
for working a fabric comprising a braking assembly according to the present invention
respectively in two operating positions thereof;
- Figure 4 shows a schematic front view of still another preferred embodiment of a machine
for working a fabric comprising a braking assembly according to the present invention
respectively in two operating positions thereof; and
- Figures 5a and 5b show schematic side views of a system according to the present invention
for introducing fabric in fabric working machines respectively in two operating positions
thereof.
[0011] As will be described below in more detail, the braking assembly according to the
present invention is adapted to suitably stretch a fabric passing therein by sliding
to be supplied to at least one working machine placed downstream of the assembly itself,
enough stretched and planar, namely lacking technically meaningful folds in the context
of a working which must be performed by the machine, suitably slowing down its sliding
speed.
[0012] Obviously, wording "upstream" and "downstream" used in the present description must
be meant related to the sliding direction V of the fabric supplied to the working
machine.
[0013] With particular reference to Figure 1, it is possible to note that the braking assembly
1 of a fabric 3 being supplied to at least one fabric working machine the as, for
example, a printing machine, comprises at least one system of rollers through which
the fabric 3 passes by sliding along a sliding direction V, the system of rollers
comprising at least one rotary roller with braked rotation 5, at least one first idle
transmission roller 7 of the fabric 3 placed upstream of the rotary roller with braked
rotation 5 and at least one second idle transmission roller 9 of the fabric 3 placed
downstream of the rotary roller with braked rotation 5, the rotation axes of the first
7 and second 9 idle transmission rollers and the rotation axis of the rotary roller
with braked rotation 5 being preferably not coplanar in order to guarantee a suitable
winding angle of the fabric 3 around the rotary roller with braked rotation 5.
[0014] Obviously, the rotary roller with braked rotation 5 can be equipped with any braking
means 11 of its rotation without thereby exiting from the scope of the present invention.
In particular, the braking means 11 can be of the type with friction braking or electromagnetic
braking, substantially known in the art.
[0015] The braking assembly 1 can obviously be an individual module to be installed on board
of any fabric working machine which is already existing and operating. Alternatively,
it is possible to provide any fabric working machine which operatively integrates
one or more braking assemblies as described above, without thereby departing from
the scope of the present invention: the present invention therefore deals also with
a fabric working machine 10, such as for example a digital printing machine, equipped
with at least one braking assembly 1 according to the present invention.
[0016] With reference then in particular to Figures 2a to 4, it is possible to note a machine
10 according to the present invention for working at least one fabric 3 equipped with
at least one braking assembly 1 according to the present invention, through which
the fabric 3 slides to be supplied to the working means of the machine 10 such as,
for example, the printing heads of a digital printing machine through at least one
conveyor belt 12, everything already known.
[0017] Preferably, the braking assembly 1 is connected to the machine 10 by interposing
handling means 13 adapted to take the braking assembly 1 itself from a first operating
position (like the one, for example, shown in Figures 2a, 3a and 4 with full lines)
for supplying the fabric 3 to the working means, and in particular in an advantageous
position of immediate proximity to the working means, to a second operating rest position
(like the one, for example, shown in Figures 2b, 3b and 4 with dashed lines), and
vice versa: advantageously, in the operating rest position, the braking assembly 1
is taken by the handling means 13 separate enough to allow at least one operator U
to access the machine 10, for example to perform maintenance, working assistance operations,
etc., without the obstacle of the braking assembly 1 itself. In addition, the operating
rest position, can allow using the working machine 10 without the intervention and
the relative obstacle of the braking assembly 1, for example where this is not required
by the specific nature of the fabric 3 to be worked.
[0018] For example, as it is possible to note in particular in Figures 2a and 2b, the handling
means 13 can comprise at least one linear actuator 15, for example with hydraulic,
pneumatic, oil-dynamic operation, etc., having a substantially vertical movement direction
and being connected to the braking assembly 1 for vertically moving this latter one
from the first operating position towards the second operating rest position (for
example along the direction shown by arrow D
1), and vice versa (for example along the direction shown by arrow D2) .
[0019] Alternatively, as it is possible to note in particular in Figures 3a and 3b, the
handling means 13 can comprise at least one linear actuator 15, for example with hydraulic,
pneumatic, oil-dynamic operation, etc., connected to the braking assembly 1 through
at least one eccentric kinematism adapted to transform the linear motion of the actuator
15 into a rotary motion of the assembly 1 itself to move in rotation this latter one
from the first operating position towards the second operating rest position (for
example along the direction shown by arrow R
1), and vice versa (for example along the direction shown by arrow R
2).
[0020] In further alternative, as it is possible to note in particular in Figure 4, the
handling means 13 can comprise at least one hinge-type kinematism 17, possibly cooperating
with at least one actuating motor (not shown), interposed between the machine 10 and
at least one longitudinal end of the braking assembly 1, in order to move in rotation
this latter one from the first, substantially horizontal operating position towards
the second, substantially vertical operating rest position, and vice versa.
[0021] With reference instead in particular to Figures 5a and 5b, it is possible to note
a system 30 for introducing fabric 3, for example coming from at least one supply
roller 37, in at least one machine 50, such as for example a digital printing machine,
for working the fabric 3. Advantageously, the system 30 according to the present invention
comprises:
- at least one centering and enlarging roller 31 equipped with a plurality of longitudinal
staves 32 interrupted, as known, in a central point and adapted to perform centering
and enlarging of the fabric 3;
- at least one dancer roller 33, 34 for synchronizing the speed of the fabric 3 (preferably
made of aluminum in order to be lightweight in contact with the fabric), wherein the
dancer roller 33, 34 is operatively coupled, only with a thrust, with at least one
counterweight 35 adapted to reduce the weight, and therefore the thrust, of the dancer
roller 33, 34 on the fabric 3 depending whether the type of fabric requires a greater
or smaller pulling force applied thereto;
- at least one braking assembly 1 of the fabric 3, as previously described, and preferably
comprising at least one system of rollers through which the fabric 3 passes by sliding
along a sliding direction V, the system of rollers comprising at least one rotary
roller with braked rotation, at least one first idle transmission roller of the fabric
3 placed upstream of the rotary roller with braked rotation and at least one second
idle transmission roller of the fabric 3 placed downstream of the rotary roller with
braked rotation 5, the rotation axes of the first and second idle transmission roller
and the rotation axis of the rotary roller with braked rotation 5 being preferably
not coplanar in order to guarantee a suitable winding angle of the fabric 3 around
the rotary roller with braked rotation itself. Advantageously, the braking assembly
1 has at least one operating supply position in immediate proximity to the working
means of the machine 50.
[0022] Advantageously, the braking assembly 1 can be connected to the system 30 by interposing
handling means 36 adapted to take the braking assembly 1 itself from the operating
position (like the one shown, for example, in Figure 5a) for supplying the fabric
3 to the working means of the machine 50, and in particular in an advantageous position
of immediate proximity to the working means, to an operating rest position (like the
one shown, for example, in Figure 5b), and vice versa: advantageously, in the operating
rest position, the braking assembly 1 is taken by the handling means 36 enough separate
to allow at least one operator to access the machine 50, for example to perform maintenance,
working assistance operations, etc., without the obstacle of the braking assembly
1. In addition, the operating rest position can allow using the working machine 50
without the intervention and the relative obstacle of the braking assembly 1 itself,
for example where this is not required by the specific nature of the fabric 3 to be
worked.
[0023] For example, as it is possible to note in particular in Figures 5a and 5b, the handling
means can comprise at least one linear actuator, for example with hydraulic, pneumatic,
oil-dynamic operation, etc., or a rack kinematism, having a substantially vertical
movement direction and being connected to the braking assembly 1 for vertically moving
this latter one from the operating supply position towards the operating rest position,
and vice versa.
[0024] The system 30 can further comprise means for enabling the centering of the fabric
3 with respect to the central point of the staves 32. In particular, the means for
enabling the centering of the fabric are composed of at least one bar adapted to connect
an handling system of the centering and enlarging roller 31 with a driven system:
this bar is equipped with at least one reference sign adapted to move with respect
to the central point in case of incorrect movement of the handling system, thereby
signaling to the operator of the system 30 that it is necessary to intervene.
[0025] In order to further change the force applied to the fabric, the counterweight 35
can further be adapted to be operatively engaged by at least one piston with spring
return, which normally is uncoupled from the counterweight 35 and engages it in a
further thrust only is driven by the controlling and managing system of the machine
50, if it is necessary to modify the finale thrust of the counterweight 35 on the
dancer roller 33, 34.
[0026] The system 30 according to the present invention, in a substantially known way in
the art, can further comprise quick handling means of the system 30 and regulating
means adapted to simultaneously allow:
- aligning the system 30 with the entry of the machine 50;
- possibly right or left moving the system 30 with respect to the entry of the machine
50 downstream; and
- rotation-preventing blocking the system 30 with respect to the entry of the machine
50 downstream.
[0027] In particular, the quick handling means are composed of at least two wheels placed
on a first side of the system 30 and/or at least two feet placed on a secondo side
of the system 30 opposite to the first side and/or a lifting/lowering device of the
screw and knob type adapted to lift/lower the system 30 with respect to the ground.
[0028] Still in particular, the regulating means are composed of:
- at least one bar, preferably elongated, which extends longitudinally and in parallel
with the longitudinal axis of the system 30 and is placed in a fixed and unmovable
position on the ground upstream of the machine 50;
- at least one bearing element placed on a side of the system 30 and adapted to get
in contact with the bar during the operating installation of the system 30; and
- at least one fastening element placed on the same side of the system 30 on which the
at least one bearing element is placed.
[0029] The fastening element is adapted to fasten the bar after the corresponding bearing
element has been placed in contact with the bar, in order to unmovably fasten the
system 30 to the bar, aligned and possibly right or left moved with respect to the
entry of the machine 50 downstream.
[0030] Preferably, the bearing element is composed of at least one plate and the fastening
element is composed of hook adapted to be completely hooked around the bar.
[0031] The preferred use configuration of the system 30 according to the present invention
can provide that the bearing elements and the fastening elements are two, placed next
to the first side and the second side of the system 30, namely respectively next to
the wheels and the feet.
[0032] As regards the operation of the thereby structured system 30, upon maintenance or
replacement, it is easily removed from the working line by lifting it through the
lifting/lowering device and moving it through the wheels. After having performed the
necessary operations, the system 30 is put again in its original position, perfectly
aligned with the machine 50, moving it till the bearing elements are in contact with
the bar placed on the ground in front of the machine 50. Once having reached the contact
with the bar on the whole length of the system 30, the fastening elements are lowered
to fasten the bar itself; then the system 30 is lowered through the lifting/lowering
device till the feet come again in contact with the ground. The system 30 is thereby
aligned with the machine 50 (in any entry position, even displaced laterally on the
right or left with respect to the centerline of the machine) and the connection of
the fastening elements to the bar, with the support of the bearing elements, further
prevents the rotation and/or the overturning of the system 30 in its operating position.
[0033] The system 30 of the invention can further be equipped with a regulating device with
bubble and steering wheel adapted to verify and make, through lateral lifting/lowering
movements, the planarity and the parallel position of the system 30 with respect to
the downstream machine 50.
1. Machine (10, 50) for working a fabric (3) equipped with at least one braking assembly
(1) of a fabric (3) being supplied to at least one fabric working machine, comprising
at least one system of rollers through which the fabric (3) passes by sliding along
a sliding direction (V), the system of rollers comprising at least one rotary roller
with braked rotation (5), at least one first idle transmission roller (7) of the fabric
(3) placed upstream of the rotary roller with braked rotation (5) and at least one
second idle transmission roller (9) of the fabric (3) placed downstream of the rotary
roller with braked rotation (5), characterized in that the braking assembly (1) is connected to the machine (10, 50) by interposing handling
means (13) adapted to take the braking assembly (1) from a first operating supply
position of the fabric (3) to the working means to a second operating rest position,
and vice versa.
2. Machine (10, 50) according to the previous claim, characterized in that the rotation axes of the first (7) and second (9) idle transmission rollers and a
rotation axis of the rotary roller with braked rotation (5) are not coplanar.
3. Machine (10, 50) according to any one of the previous claims, characterized in that the rotary roller with braked rotation (5) is equipped with at least one braking
means (11) of its rotation.
4. Machine (10, 50) according to the previous claim, characterized in that the braking means (11) is of the type with friction braking or electromagnetic braking.
5. Machine (10, 50) according to the previous claim, characterized in that the first operating position is a position of immediate proximity to the working
means.
6. Machine (10, 50) according to claim 4, characterized in that the handling means (13) comprise at least one linear actuator (15) having substantially
vertical movement direction and being connected to the braking assembly (1) for vertically
moving the braking assembly (1) from the first operating position towards the second
operating rest position, and vice versa.
7. Machine (10, 50) according to claim 4, characterized in that the handling means (13) comprise at least one linear actuator (15) connected to the
braking assembly (1) through at least one eccentric kinematism adapted to transform
a linear motion of the actuator (15) into a rotary motion of the assembly (1) to move
in rotation the braking assembly (1) from the first operating position towards the
second operating rest position, and vice versa.
8. Machine (10, 50) according to claim 4, characterized in that the handling means (13) comprise at least one hinge-type kinematism (17) interposed
between the machine (10, 50) and at least one longitudinal end of the braking assembly
(1) to move in rotation the braking assembly (1) from the first, substantially horizontal
operating position towards the second, substantially vertical operating rest position,
and vice versa.
9. System (30) for introducing fabric (3) in at least one machine (10, 50) for working
the fabric (3) equipped with at least one braking assembly (1) of a fabric (3) being
supplied to at least one fabric working machine, comprising at least one system of
rollers through which the fabric (3) passes by sliding along a sliding direction (V),
the system of rollers comprising at least one rotary roller with braked rotation (5),
at least one first idle transmission roller (7) of the fabric (3) placed upstream
of the rotary roller with braked rotation (5) and at least one second idle transmission
roller (9) of the fabric (3) placed downstream of the rotary roller with braked rotation
(5), the braking assembly (1) being connected to the machine (10, 50) by interposing
handling means (13) adapted to take the braking assembly (1) from a first operating
supply position of the fabric (3) to the working means to a second operating rest
position, and vice versa, the system (30) comprising:
- at least one centering and enlarging roller (31) equipped with a plurality of longitudinal
staves (32) adapted to perform centering and enlarging of the fabric (3);
- at least one dancer roller (33, 34) for synchronizing a speed of the fabric (3);
- at least one of the braking assemblies (1) of the fabric (3) having at least one
operating supply position in immediate proximity with working means of the machine
(50);
characterized in that the braking assembly (1) is connected to the system (30) by interposing handling
means (36) adapted to take the braking assembly (1) from the operating supply position
of the fabric (3) to the working means of the machine (50) to an operating rest position,
and vice versa.
10. System (30) according to the previous claim, characterized in that the handling means (36) comprise at least one linear actuator or a rack mechanism
having a substantially vertical movement direction and being connected to the braking
assembly (1) for vertically moving the braking assembly (1) from the operating supply
position towards the operating rest position, and vice versa.
1. Stoffverarbeitungsmaschine (10, 50) (3), die mit mindestens einer Bremseinheit (1)
eines in der Zuführung in mindestens eine Stoffverarbeitungsmaschine befindlichen
Stoffes (3) ausgestattet ist, die mindestens ein Rollensystem enthält, durch das der
Stoff (3) entsprechend einer Gleitrichtung (V) gleitet, das Rollensystem enthält mindestens
eine Rotationsrolle mit gebremster Rotation (5), mindestens eine erste Freilauf-Umlenkrolle
(7) des Stoffes (3), die oberhalb der Rotationsrolle mit gebremster Rotation (5) angebracht
ist, und mindestens eine zweite Freilauf-Umlenkrolle (9) des Stoffes (3), die unterhalb
der Rotationsrolle mit gebremster Rotation (5) angebracht ist, und ist dadurch gekennzeichnet, dass die Bremseinheit (1) durch Einfügen von Bewegungsvorrichtungen (13) mit der Maschine
(10, 50) verbunden ist, die dazu dienen, die Bremseinheit (1) von einer ersten Betriebsposition
der Stoffzuführung (3) auf die Verarbeitungsvorrichtungen in eine zweite Betriebsruhestellung
zu führen und umgekehrt.
2. Maschine (10, 50) gemäß dem vorhergehenden Patentanspruch, die dadurch gekennzeichnet ist, dass Rotationsachsen der ersten (7) und der zweiten (9) Freilauf-Umlenkrolle und eine
Rotationsachse der Rotationsrolle mit gebremster Rotation (5) nicht komplanar sind.
3. Maschine (10, 50) gemäß einem beliebigen der vorhergehenden Patentansprüche, die dadurch gekennzeichnet ist, dass die Rotationsrolle mit gebremster Rotation (5) mit mindestens einer Bremsvorrichtung
(11) ihrer Rotation ausgestattet ist.
4. Maschine (10, 50) gemäß dem vorhergehenden Patentanspruch, die dadurch gekennzeichnet ist, dass die Bremsvorrichtung (11) eine Reibungsbremsung oder eine elektromechanische Bremsung
ist.
5. Maschine (10, 50) gemäß dem vorhergehenden Patentanspruch, die dadurch gekennzeichnet ist, dass die erste Betriebsposition eine Position in unmittelbarer Nähe der Verarbeitungsvorrichtungen
ist.
6. Maschine (10, 50) gemäß Patentanspruch 4, die dadurch gekennzeichnet ist, dass die Bewegungsvorrichtungen (13) mindestens einen linearen Antrieb (15) mit einer
grundlegend vertikalen Bewegungsrichtung enthalten, und dass er mit der Bremseinheit
(1) verbunden ist, um die Bremseinheit (1) vertikal von der ersten Betriebsposition
auf die zweite Betriebsruhestellung zu bewegen und umgekehrt.
7. Maschine (10, 50) gemäß Patentanspruch 4, die dadurch gekennzeichnet ist, dass die Bewegungsvorrichtungen (13) mindestens einen linearen Antrieb (15) enthalten,
der mit der Bremseinheit (1) durch ein Kurvengetriebe verbunden ist, das dazu dient,
eine lineare Bewegung des Antriebs (15) in eine Rotationsbewegung der Einheit (1)
umzuwandeln, um die Bremseinheit (1) rotierend von der ersten Betriebsposition auf
die zweite Betriebsruhestellung zu bewegen und umgekehrt.
8. Maschine (10, 50) gemäß Patentanspruch 4, die dadurch gekennzeichnet ist, dass die Bewegungsvorrichtungen (13) mindestens ein Scharniergetriebe (17) enthalten,
das zwischen der Maschine (10, 50) und mindestens einem longitudinalen Ende der Bremseinheit
(1) angebracht ist, um die Bremseinheit (1) rotierend grundlegend horizontal von der
ersten Betriebsposition auf die zweite grundlegend vertikale Betriebsruhestellung
zu bewegen und umgekehrt.
9. Stoffeinführungssystem (30) in mindestens einer Stoffverarbeitungsmaschine (10, 50)
(3), die mit mindestens einer Bremseinheit (1) eines Stoffes (3) ausgestattet ist,
der mindestens einer Stoffverarbeitungsmaschine zugeführt wird, welche mindestens
ein Rollensystem enthält, durch das der Stoff (3) entsprechend einer Gleitrichtung
(V) gleitet, das Rollensystem enthält mindestens eine Rotationsrolle mit gebremster
Rotation (5), mindestens eine erste Freilauf-Umlenkrolle (7) des Stoffes (3), die
oberhalb der Rotationsrolle mit gebremster Rotation (5) angebracht ist, und mindestens
eine zweite Freilauf-Umlenkrolle (9) des Stoffes (3), die unterhalb der Rotationsrolle
mit gebremster Rotation (5) angebracht ist, die Bremseinheit (1) ist durch Einfügen
von Bewegungsvorrichtungen (13) mit der Maschine (10, 50) verbunden, die dazu dienen,
die Bremseinheit (1) von einer ersten Betriebsposition der Stoffzuführung (3) auf
die Verarbeitungsvorrichtungen in eine Betriebsruhestellung zu führen und umgekehrt,
das System (30) enthält:
- mindestens eine Zentrier- und Erweiterungsrolle (31), die mit mehreren longitudinalen
Latten (32) ausgestattet ist, welche dazu dienen, eine Zentrierung und Erweiterung
des Stoffes (3) auszuführen;
- mindestens eine Tänzerrolle (33, 34) für die Synchronisation einer Stoffgeschwindigkeit
(3);
- mindestens eine Bremseinheit (1) des Stoffes (3), die mindestens eine Betriebsposition
der Zuführung in unmittelbarer Nähe der Verarbeitungsvorrichtungen der Maschine (50)
hat;
und ist
dadurch gekennzeichnet, dass die Bremseinheit (1) mit dem System (30) durch Einfügen der Bewegungsvorrichtungen
(36) verbunden ist, die dazu dienen (36), die Bremseinheit (1) von der Betriebsposition
der Stoffzuführung (3) auf die Verarbeitungsvorrichtungen der Maschine (50) in eine
Betriebsruhestellung zu führen und umgekehrt.
10. System (10, 30) gemäß Patentanspruch 4, das dadurch gekennzeichnet ist, dass die Bewegungsvorrichtungen (36) mindestens einen linearen Antrieb oder einen Zahnstangenmechanismus
mit einer grundlegend vertikalen Bewegungsrichtung enthalten, und dass er mit der
Bremseinheit (1) verbunden ist, um die Bremseinheit (1) vertikal von der Betriebsposition
der Zuführung auf die Betriebsruhestellung zu bewegen und umgekehrt.
1. Machine (10, 50) de travail d'un tissu (3) dotée au moins d'un groupe de freinage
(1) du tissu (3) alimentant une machine de travail de tissus, qui comprend un système
de rouleaux à travers lequel le tissu (3) passe en glissant dans un sens de glissement
(V) ; le système de rouleaux comprend au moins un rouleau pivotant à rotation freinée
(5), un premier rouleau fou de renvoi (7) du tissu (3) placé en amont du rouleau pivotant
à rotation freinée (5) et un second rouleau fou de renvoi (9) du tissu (3) situé en
aval du rouleau pivotant à rotation freinée (5) ; caractérisée en ce que le groupe de freinage (1) est relié à la machine (10, 50) à travers l'interposition
de moyens de mise en mouvement (13) aptes à porter le groupe de freinage (1) depuis
une première position opérationnelle d'alimentation du tissu (3) pour les moyens de
travail vers une seconde position opérationnelle de repos et inversement.
2. Machine (10,50), selon la revendication précédente, caractérisée en ce que les axes de rotation du premier (7) et du second (9) rouleau fou de renvoi et un
axe de rotation du rouleau pivotant à rotation freinée (5) ne sont pas coplanaires.
3. Machine (10, 50), selon l'une des revendications précédentes, caractérisée en ce que le rouleau pivotant à rotation freinée (5) est doté au moins d'un moyen de freinage
(11) de sa rotation.
4. Machine (10,50), selon la revendication précédente, caractérisée en ce que le moyen de freinage (11) est du type à freinage par frottement ou freinage électromagnétique.
5. Machine (10,50), selon la revendication précédente, caractérisée en ce que la première position opérationnelle est une position qui se trouve à proximité des
moyens de travail.
6. Machine (10,50), selon la revendication 4, caractérisée en ce que les moyens de mise en mouvement (13) comprennent au moins un actionneur linéaire
(15) ayant une direction de mouvement substantiellement verticale et qui est relié
au groupe de freinage (1) pour déplacer verticalement le groupe de freinage (1) depuis
la première position opérationnelle vers la seconde position opérationnelle de repos
et inversement.
7. Machine (10,50), selon la revendication 4, caractérisée en ce que les moyens de mise en mouvement (13) comprennent au moins un actionneur linéaire
(15) relié au groupe de freinage (1) à travers au moins un cinématisme excentrique
apte à transformer un mouvement linéaire de l'actionneur (15) en un mouvement rotatoire
du groupe (1) pour déplacer en rotation le groupe de freinage (1) depuis la première
position opérationnelle vers la seconde position opérationnelle de repos, et inversement.
8. Machine (10,50), selon la revendication 4, caractérisée en ce que les moyens de mise en mouvement (13) comprennent au moins un cinématisme à charnière
(17) interposé entre la machine (10, 50) et une extrémité longitudinale du groupe
de freinage (1) pour déplacer en rotation le groupe de freinage (1) depuis la première
position opérationnelle substantiellement horizontale vers la seconde position opérationnelle
de repos substantiellement verticale, et inversement.
9. Système (30) pour l'introduction du tissu (3) dans une machine (10, 50) de travail
du tissu (3) doté au moins d'un groupe de freinage (1) du tissu (3) qui est alimenté
par une machine de travail du tissu, comprenant au moins un système de rouleaux à
travers lequel le tissu (3) passe en glissant dans un sens de glissement (V) ; le
système de rouleaux comprend au moins un rouleau pivotant à rotation freinée (5),
un premier rouleau fou de renvoi (7) du tissu (3) situé en amont du rouleau pivotant
à rotation freinée (5) et un second rouleau fou de renvoi (9) du tissu (3) situé en
aval du rouleau pivotant à rotation freinée (5) ; le groupe de freinage (1) est relié
à la machine (10, 50) à travers l'interposition de moyens de mise en mouvement (13)
aptes à porter le groupe de freinage (1) depuis une première position opérationnelle
d'alimentation du tissu (3) pour les moyens de travail vers une position opérationnelle
de repos et inversement ; le système (30) comprend :
- au moins un rouleau centreur et élargisseur (31) doté d'une pluralité de lames (32)
longitudinales aptes à effectuer le centrage et l'élargissement du tissu (3) ;
- au moins un rouleau baladeur (33, 34) de synchronisation d'une vitesse du tissu
(3) ;
- au moins un groupe de freinage (1) du tissu (3) ayant une position opérationnelle
d'alimentation à proximité des moyens de travail de la machine (50);
caractérisé en ce que le groupe de freinage (1) est relié au système (30) à travers l'interposition de
moyens de mise en mouvement (36) aptes à porter le groupe de freinage (1) depuis la
position opérationnelle d'alimentation du tissu (3) pour les moyens de travail de
la machine (50) vers une position opérationnelle de repos et inversement.
10. Système (30) selon la revendication précédente, caractérisé en ce que les moyens de mise en mouvement (36) comprennent au moins un actionneur linéaire
ou un mécanisme à crémaillère ayant une direction de mouvement substantiellement verticale
et qui est relié au groupe de freinage (1) pour déplacer verticalement le groupe de
freinage (1) depuis la position opérationnelle d'alimentation vers la position opérationnelle
de repos et inversement.