[0001] The present invention relates to a machine for winding web-like materials.
[0002] In various industrial fields web-like materials are packaged in the form of reels
obtained by winding the web-like materials on suitable rods that act as supports during
the winding. When a reel has been completed, its rod is removed for reuse. The web-like
materials wound as reels are generally intended to undergo different transformations
according to the specific applications and they can be, for example, paper or non-woven
fabric. The transformations can include, for example, the unwinding and a new rewinding
of the material in order to produce rolls with a diameter smaller than that of the
starting reels, intermediate embossing operations between the unwinding and the subsequent
rewinding, the transversal cutting of the rolls to obtain products of axial length
shorter than that of the starting reel, etc. The machines by which the winding is
carried out are generally called "winders" and they typically include a structure
that allows the web-like material to pass over a winding roller against which the
rod on which the reel is formed is pushed. The reel, during its formation, is kept
in contact with the winding roller due to the thrust exerted through the rod which,
in turn, is held by suitable supports allowing it to be translated along the guides
formed in the aforementioned structure. Cyclically, when a reel is completed, i.e.
it has a diameter of a predetermined value, the web-like material is interrupted,
the completed reel is distanced from the winding roller moving it to an unloading
station while it is still on the relative winding rod, and another winding rod is
positioned on the winding roller to form a new reel.
[0003] The winding rods are generally stored in a superstructure of the machine in a position
above the winding roller. It is therefore necessary to provide a mechanism for removing
the winding rods from the storage point and positioning them in the area of the machine
where the reels are formed.
[0004] US4744526A discloses the preamble of claim 1.
[0005] The pick-up mechanism described in
US4744526 determines machine dimensions that are incompatible with the current production needs
which increasingly aim at reducing the space required for the installation of these
machines.
US4768730A also discloses a machine for winding web-like materials in the form of reels, comprising
a winding roller over which the web-like material intended to be wound passes, wherein
the winding roller cooperates with a winding rod on which the web-like material is
wound to form a reel, wherein the winding roller is positioned in a corresponding
containment structure, wherein the winding roller is oriented transversely to said
structure, and wherein the machine is served by a storage in which several winding
rods can be stored and a mechanism for removing the rods from said storage. The mechanism
for picking up the rods from the storage consists of several distinct groups of arms
which exchange with each other the rods taken from the storage in such a way that
each arm is intended to perform a specific operation: a first arm picks up the rods
and delivers them to a second arm, the second arm receives the rods from the first
arm and subsequently delivers them to a third arm which, in turn, moves them parallel
to the winding roller to start a winding cycle. Also in this case, the problems relating
to the spaces required for the installation and operation of the machine remain unresolved.
EP0849202A1 also discloses a machine for winding web-like materials in the form of reels, comprising
a winding roller over which the web-like material intended to be wound passes, wherein
the winding roller cooperates with a winding rod on which the web-like material is
wound to form a reel, wherein the winding roller is positioned in a corresponding
containment structure, wherein the winding roller is oriented transversely to said
structure, and wherein the machine is served by a storage in which several winding
rods can be stored and a mechanism for removing the rods from said storage. Also in
this case the picking of the rods from the storage is managed by means of arms which
are distinct from those which move the rods around the winding roller.
[0006] The present invention relates, in particular, to the removal of the winding rods
from the respective storage point and to their movement during the winding of the
web material and it aims at providing a system for controlling the winding rods that
is structurally simple, precise, reliable and more compact than the known pick-up
mechanisms.
[0007] This result has been achieved, in accordance with the present invention, by adopting
the idea of making a machine having the features indicated in claim 1. Other features
of the present invention are the subject of the dependent claims.
[0008] Thanks to the present invention, it is possible to realize a machine for winding
web-like materials which ensures an improved continuity in the growth of the diameter
of the reels progressively formed and a remarkable precision in positioning the rods
in correspondence with the winding roller without however involving a particular mechanical
complexity. Furthermore, a system for picking up and positioning the rods in a machine
in accordance with the present invention allows to control the nip pressure at the
winder roller/reel interface and offers the possibility of improving the control of
the movement of the reels towards the parking point of the finished rolls.
[0009] These and further advantages and characteristics of the present invention will be
more and better understood by each person skilled in the art thanks to the description
that follows and the annexed drawings, provided by way of example but not to be considered
in a limiting sense, in which:
- Fig.1 represents a schematic perspective view of an arm for moving the winding rods
in a machine in accordance with a possible example of embodiment of the present invention;
- Figs. 2-5 schematically represent a machine in accordance with a possible embodiment
of the present invention in different production phases of a reel of web material,
with machine parts not shown to better highlight others;
- Fig.6 schematically represents a machine according to a further embodiment of the
present invention;
- Fig. 7 represents a schematic plan view of a rod;
- Figs. 8 and 9 show a further example of embodiment of a machine in accordance with
the present invention;
- Fig.10 is a simplified block diagram relating to a possible configuration of a control
system for the movements of the arms in accordance with the present invention;
- Fig.11 represents a schematic perspective view of an arm for moving the winding rods
in a machine in accordance with another example of embodiment of the present invention;
- Fig. 12 schematically represents a machine in accordance with another example of embodiment
of the present invention which foresees the use of the arm of Fig. 11.
[0010] Reduced to its essential structure and with reference to the attached drawings, a
machine (M) in accordance with the present invention comprises a winding roller (1)
on which the web-like material intended to be wound is made to pass. The winding roller
(1) cooperates with a winding rod (2) on which the web-like material is wound to form
a reel (B). The winding roller (1) is positioned in a structure (3) provided with
sides (30) on which two corresponding linear guides (31) are formed parallel to each
other and oriented according to a predetermined direction (L) which defines a direction
of advancement of the winding rod (2) while the respective reel (B) is forming on
the same rod. The winding roller (1) is oriented transversely to said sides, so that
its rotation axis (1A) is horizontal. The machine is served by a storage in which
several winding rods (2) can be stored and by a mechanism for removing the rods (2)
from the storage (S). The rods (2), according to a configuration known per se, have
ends (20) adapted to be gripped by a gripping device. In practice, the rods (2) have
a central cylindrical body (21) which is the very winding surface, i.e. the surface
on which the web-like material is wound, and two circular ends (20) that define two
corresponding rod gripping portions. As shown in Fig. 7, between the central body
(21) and each of the ends (20), the rods (2) have annular grooves that define both
the rolling surfaces (22) of the rods on the aforementioned guides (31) and further
parts (23) graspable by gripping means as further described below.
[0011] For example, the web-like material is paper produced by a papermaking machine. Preferably,
said storage consists of a superstructure (32) of the machine arranged at a greater
height than the winding roller (1) and comprising supports (33) for supporting and
rolling the winding rods (2) with an exit side (33E) from which the rods (2) can be
taken, as further described below.
[0012] In accordance with the present invention and with reference to the example shown
in Figs. 1-5, the mechanism for removing the rods (2) from the storage (S) comprises
two arms (45), that is, one arm (45) for each side of the structure (3). Each arm
consists of two elements (4, 5) hinged to each other with a hinge axis (A45) parallel
to the rotation axis of the winding roller (1). With reference to the example shown
in the attached drawings, said arms (45) are positioned externally on the sides (30)
of the machine. As further disclosed below, the first element (4) of each arm (45)
can rotate around the axis (A45) of the respective hinge connection with the second
arm (5) and the second element (5) can rotate around the winding roller axis (1).
In this way, the first element (4) of each arm (45) can rotate with respect to the
second element (5) which, in turn, can rotate around the axis of the winding roller
(1). The second element (5) can be connected to the base structure of the machine
(M) by means of a hinge connection having the axis coinciding with the axis (1A) of
the winding roller (1), as in the example shown in Figs. 2-5, or it can be constrained
to the superstructure (32) of the machine (M) by means of a hinge connection with
axis parallel to the axis (1A) of the winding roller (1), as in the example shown
in Fig. 6.
[0013] Preferably, the rotation of the first element (4) of each arm around the axis (A45)
is controlled by a first electric gear motor (M4) and the rotation of the second element
(5) around the axis (1A) of the winding roller (1) is controlled by a second electric
gear motor (M5). In this configuration, the gearmotors (M4, M5) are controlled independently,
so that the rotation of each element (4, 5) can be controlled independently from the
rotation of the other element of the same arm.
[0014] With reference to the example shown in the attached drawings, said elements (4, 5)
are formed by metal plates, that is, by bodies with a predominantly longitudinal development
in which two dimensions are prevalent with respect to the third, and are hinged to
each other in proximity of two respective end portions (40, 50) side by side. The
first element (4) of each arm (45) has a gripping device suitable for gripping a corresponding
end of a winding rod (2), as further described below.
[0015] For example, said gripping device is formed by a gripper (42) comprising a jaw (420)
hinged on a free end (421) of the first element (4), which acts as a fixed jaw of
the gripper. Said free end (421) is concave, with the concavity facing outwards, and
the jaw (420) is mobile, being hinged on the free end of the element (4), and has
an internal side (422) which also is concave, so that the concavities (421, 422) respectively
presented by the fixed jaw and the movable jaw define, in cooperation with each other,
a seat suitable for receiving a corresponding end of a winding rod (2). With reference
to the example shown in the drawings, said seat, seen laterally, has a substantially
circular shape. For example, the movable jaw (420) can be rotated on the end (421)
of the first element (4) by means of a linear actuator (43) which is mounted on one
side on an appendix (423) of the first element (4) and, on the opposite side, on an
appendix (424) of the same movable jaw (420). For example, the appendix (423) is an
upper wing of the first element (4). The appendix (424) of the movable jaw (420) can
also be an upper appendix of the latter, so that the actuator (43) does not interfere
with the gripping of the winding rods (2). The connection between the jaw (420) and
the first element (4) of the arm (45) can be made, for example, by means of a hinge
(425) with axis transversal to the first element (4) and to the jaw (420). The actuator
(43) controls the rotation of the movable jaw (420) around the axis of the hinge (425)
as schematically indicated by the double arrow in Fig.1. In Fig.1 the jaw (420) is
in the gripping configuration, being rotated towards the fixed jaw formed on the free
end of the first element (4). In practice, the actuator (43) determines the opening
and closing of the seat for gripping one end of a winding rod (2) by rotating the
movable jaw (420) to and from the first element (4) around the axis of the hinge (425).
Preferably, the movable jaw (420) is formed by a metal plate placed laterally offset
with respect to the end (421) of the first element (4). The device described above
is therefore a gripper arranged on the first element (4) of each arm (45) for gripping
and respectively releasing the winding rods (2). The movable jaw (420) can be moved
by an actuator different from the one described above, such as for example a rotary
actuator (not shown in the drawings) applied on the element (4) and acting on the
movable jaw (420).
[0016] Each arm (45) has an external side, turned towards the outside of the machine (M),
and an internal side turned towards the machine (M).
[0017] For each arm (45), the first gearmotor (M4) is applied on the external side of the
first element (4), at the point of connection with the second element (5). In the
example of Fig.1, the stator of the gearmotor (M4) is on the element (4), while the
rotor is connected to the element (5). It is understood, however, that the stator
of the gearmotor (M4) can be on the element (5) and in this case the rotor will be
connected to the element (4). Similarly, the second gearmotor (M5) is applied on the
external side of the second element (5), at the point of connection of the latter
to the respective side (30) of the machine (M). In the example of Figs. 2-5, the stator
of the gearmotor (M5) is on the element (5), while the rotor is connected to the connection
point of the element (5) with the respective side (30) of the machine (M). However,
the stator of the gearmotor (M5) can be on said connection point and in this case
the rotor will be connected to the element (5).
[0018] Figs. 2-5 illustrate a possible cycle of engagement, movement and release of a winding
rod (2A) by means of two arms (45) made as described above. In Figs. 2-5 the rod picked
up and moved by the arms (45) is indicated with the reference "2A" to distinguish
it from the rods that remain on the superstructure (32).
[0019] In Fig.2 is shown a reel (B) being completed, still close to the winding roller (1).
In the same Fig.2 are shown the arms (45) in the position of picking up a rod (2A)
from the exit side (33E) of the superstructure (32), with the grippers (42) of the
ends (20) of the same rod (2A).
[0020] In Fig.3 the arms (45) are positioning the rod (2A), previously taken from the superstructure
(32), on the winding roller (1). In the passage from the configuration of Fig.2 to
the configuration of Fig.3, the first element (4) of each arm (45) rotates around
the axis (A45), while the second element (5) rotates around the axis (1A). The combined
rotation of the elements (4, 5) of the arms (45) determines the positioning of the
rod (2A) against the winding roller (1) on the upper side of the latter. Meanwhile,
on the exit side (33E) of the superstructure (32) another rod (2) has taken the place
of the one previously taken by the arms (45). In correspondence with the positioning
of the rod (2A) on the winding roller (1), it is determined the interruption of the
web material by which the reels are formed.
[0021] In Fig.4A is shown the rod (2) placed by the arms (45) in front of the winding roller
(1) and the material that forms the new reel (NB) has been wound on it. The completed
reel (B) has been moved away. Also in the transition from the configuration of Fig.3
to the configuration of Fig.4A the combined rotation of the elements (4, 5) around
the axes (45) and (1A) determines the movement of the rod (2A). In the passage between
the position of Fig.3 and the position of Fig.4A the longitudinal axis (X) of the
rod (2A) moves along a trajectory which is first parallel to the external surface
of the winding roller (1) and then follows the direction of the guides (31), as schematically
illustrated in Fig.4B. In the meantime, as a result of the dragging carried out by
the winding roller (1), the rod (2A) rotates around its axis, winding the web-like
material on it, material which is fed along a predetermined feeding direction upstream
of the winding roller (1) in ways known per se.
[0022] Fig. 5 shows a further configuration of the arms (45), upon reaching the predetermined
diameter of the reel (NB) with the material (W).
[0023] The arms (45) support the ends (20A) of the rod (2A) on the guides (31) of the machine
(M) as the diameter of the reel being formed (NB) increases.
[0024] As previously said, the annular grooves (22) facilitate the rolling of the rods (2),
and therefore of the reels (NB), on the guides (31) of the machine.
[0025] It goes without saying that the grippers (42) mounted on the arms (45) do not block
the ends (20) of the rods (2) so as not to prevent the rolling of the same on the
guides (31). In practice, the grippers (42) define a removable constraint which allows
the arms (45) to move the rods (2) from the superstructure (32) to the position of
contact with the winding roller (1) and along the guides (31), without however preventing
the rods (2) from rotating around their longitudinal axes.
[0026] Upon reaching a predetermined final diameter of the new reel (NB), the grippers (42)
release the respective ends (20A) of the rod (2A) and the arms (45) can be returned
to the position of picking up another rod from the superstructure (32) to start a
new cycle. The completed reel is then removed from the machine (M) in ways known per
se. With reference to the example shown in Fig. 6, the second element (5) of each
arm (45) is hinged on the superstructure (32). Everything previously said in relation
to the structure and operation of the arms (45) and, more generally, of the machine
(M) remains valid. Also in this case, the movements of the rods (2) along the path
between the aforementioned storage and the winding station where the winding roller
(1) acts is determined by the combination of the rotary movements of the first and
second elements (4, 5) of each arm (45).
[0027] As shown in Figs. 8 and 9, the machine (M) is provided with a carriage (6) mounted
on the external side of each of its sides (30) and movable parallel to the same sides
of the machine bidirectionally to and from the winding roller (1) by means of a corresponding
drive unit (not visible in the drawings). On said carriage (6) there is a gripper
(60) controlled by a corresponding actuator (61) also mounted on the carriage (6).
This device is known per se (in technical jargon it is commonly called "secondary
arm") and, therefore, it is not described in greater detail. A possible way of using
the carriages (6) in the context of the present invention is the following. The carriages
(6) are brought closer to the rod (2) on which the reel (NB) is being formed, keeping
the grippers (60) open. Subsequently, each gripper (60) is closed on a corresponding
annular groove (22) to engage the respective end of the rod (2A) next to the gripper
(42) of the corresponding arm (45) which, at this point, is opened. In this way, the
carriages (6) engage the reel (NB) being formed, ensuring its support until the final
diameter is reached and until the selected parking position on the guides (31) is
reached. In the meantime, the arms (45) can be brought to the pick-up position of
another rod (2) from the superstructure (32). Fig.8 shows the exchange, i.e. the phase
in which the carriages (6) engage the completed reel (B) which is released by the
grippers (42) mounted on the arms (45). The carriages (6) can engage the new reel
in formation even if the final diameter of the latter is compatible with the length
of the arms (45). Therefore, the arms (45) can anticipate the picking up of the rods
(2) with respect to reaching the final diameter of the reel to be formed. In Fig.9
the arms (45) have already picked up a rod and have positioned it in contact with
the winding roller (1) while the reel is almost completed and is engaged by the carriages
(6) which can also carry out a "pusher" function by accompanying the completed reel
to a predetermined parking point downstream.
[0028] In the context of the present description, "length of the arms (45)" means the sum
of the lengths of the elements (4) and (5).
[0029] The arms (45) can also be used to adjust the pressure of the nip at the winder roller
/ reel interface. This pressure, which in general is within the minimum and maximum
values set according to the nature or structure of the web (W) and the winding speed
imposed by the winding roller (1), can be regulated through the reciprocal rotation
of the elements (4, 5) of each arm (45) which causes a greater or lesser thrust of
the rod (2A) against the winding roller (1). For this purpose, a torque load cell
(C4) in the hinge for attachment of the first element (4) to the second element (5)
and a torque load cell (C5) in the attachment hinge of the second element (5) to the
machine structure (M) can also be provided. The load cells (C4, C5) of each arm can
be connected to a programmable unit (UE) which controls the gearmotors (M4, M5) of
the arms (45) according to a program residing in one of its memory sections. The diagram
in Fig. 10 illustrates a possible configuration of the connections between the load
cells (C4, C5) with the control unit (UE) to which position sensors (P4, P5) are also
connected, suitable for detecting the angular position of the elements (4, 5). The
unit (UE) can be programmed not only to carry out the movements of the arms (45) as
described above but also to adjust the nip pressure according to the readings of the
load cells (C4, C5). It goes without saying that the movements of the arms (45), i.e.
the movements of the elements (4) and (5) of the arms (45), are synchronized with
each other, so that on the two sides of the machine (M) the movements of the arms
are coordinated.
[0030] In accordance with the present invention, the removal of the rods (2) from the storage
of the same is performed by two arms (45) which, in addition to the removal of the
rods (2), also perform the movement of the same rods along a predefined path which
includes their positioning against the unwinding roller (1). Preferably, the arms
(45) also control the translation of the rods (2) along the guides (31) as the diameter
of the reels being formed increases, until reaching a predetermined diameter.
[0031] In accordance with the examples described above, the two arms (45) are each formed
of two elements (4, 5) hinged to each other so that the aforementioned path is formed
by a combination of rotary movements around two axes parallel to each other. One of
these axes can coincide with the rotation axis (1A) of the winding roller (1). Alternatively,
both said axes can be distinguished from the rotation axis (1A) of the winding roller
(1), as shown by way of example with reference to Fig. 6. Preferably, the two elements
(4, 5) are each operated by a corresponding actuator (M4, M5) so that the rotation
of each of them can be controlled independently.
[0032] In accordance with a further embodiment of the invention, a rotary actuator (7) can
be mounted on the external side of the first element (4) of each arm (45), such as
for example an electric motor, which can be used to control the rotation of the rods
(20) around the respective longitudinal axes with predetermined angular speed. With
reference to the example shown in Fig.11, the actuator (7) is supported by a bracket
(70) cantilevered on the external side of the first element (4) of the arm (45) and
has an output shaft, oriented parallel to the axis (A45) of the hinge connecting the
first and second elements of the arm itself, and facing the gripper (42). For example,
a friction disk (71) is applied to said shaft. The actuator (7) is positioned on the
bracket (70) so that the friction disc (71) can come into contact with the outer face
of the end (20A) of any rod engaged by the respective gripper (42). In practice, the
rotation of the discs (71) in contact with the external faces of the two ends (20)
of a rod (2) determines the rotation of the latter around its longitudinal axis with
angular speed imposed by the actuator (7). The actuator is mounted on a carriage (72)
to allow it to be moved on the bracket (70), to and from the end of the arm (45) on
which the gripper (42) is mounted. In Fig.11 said movement of the actuator (7) on
the bracket (70) is indicated by the arrow "FA". Movement (FA) is controlled by a
corresponding motor not visible in the drawings. The actuator (7) is moved towards
the end of the rod engaged by the gripper (42) when it is desired to drag the rod
into rotation due to the contact between the end of the latter and the friction disc
(71). Conversely, the opposite movement of the actuator (7) determines the disengagement
of the rod from the friction disc (71). This mechanism can be useful when the rotation
of the rod (2) during the formation of a reel must not be ensured exclusively by the
pressure against the winding roller (1).
[0033] Fig. 12 illustrates by way of example the use of the arms (45) provided with the
actuator (7) on the machine (M) in the configuration of Fig. 8.
[0034] In relation to what has been described above, a machine for winding web-like materials
in the form of reels in accordance with the present invention comprises a winding
roller (1) on which the web-like material intended to be wound passes, wherein the
winding roller (1) cooperates with a winding rod (2) on which the web-like material
winds up to form a reel (B), wherein the winding roller (1) is positioned in a structure
(3) provided with sides (30) on which two corresponding linear guides (31) are formed
parallel to each other and oriented according to a predetermined direction (L) which
defines a direction of advancement of the winding rod (2) while the respective reel
(B) is formed on the rod itself, wherein the winding roller (1) is oriented transversely
to said sides, and wherein the machine (M) is served by a storage (32) in which several
winding rods (2) can be stored and by a mechanism per picking up the rods (2) from
the storage (32), said mechanism for picking up the rods being constituted by a pair
of arms (45) each of which is arranged on a corresponding side of the machine and
consists of two elements (4, 5) hinged to each other with a hinge axis (A45) parallel
to the axis (1A) of rotation of the winding roller (1), an element (5) being hinged
on one side of the machine with a hinge axis parallel to the axis (1A) of the winding
roller (1) or coinciding with said axis (1A), the other element (4) being provided
with gripping means (42) adapted to engage a corresponding end (20) of a rod (2) on
the storage (32), and move it towards the winding roller (1) and along a predetermined
path (T) with a section parallel to the outer surface of the winding roller (1). Said
path (T) can comprise a second section parallel to the guides (31).
[0035] In a preferred embodiment, said elements (4, 5) of each arm (45) are each moved by
a respective actuator (M4, M5).
[0036] Preferably, said elements (4, 5) of each arm (45) consist of metal plates with a
predominantly longitudinal development.
[0037] In a possible embodiment, an element (5) of each arm (45) is hinged on the machine
(M) with a hinge axis coinciding with the axis (1A) of the winding roller (1).
[0038] In an alternative embodiment, an element (5) of each arm (45) is hinged on said superstructure
with a hinge axis parallel to the axis (1A) of the winding roller (1).
[0039] In a possible embodiment, said gripping means (42) are gripper means with two jaws
which, in cooperation with each other, define a gripping seat.
[0040] In a possible embodiment, said gripper means comprise a fixed jaw formed on one end
of an element (4) of the arm (45) and a movable jaw (420) controlled by an actuator
(43). In accordance with this embodiment, the fixed jaw has a concave side (421) facing
the movable jaw (420) and the movable jaw (420) has a concave side (422) facing the
fixed jaw.
[0041] Furthermore, in a possible embodiment of the present invention said arms (45) are
controlled by a programmable unit (UE) which receives signals from load cells (C4,
C5) mounted on the two elements (4, 5) of each arm and controls the rotation of these
elements through corresponding independent actuators (M4, M5).
[0042] In another embodiment of the present invention, the machine comprises a carriage
(6) mounted on each of its sides and provided with gripping means (60) adapted to
pick up the rods (2) from said arms (45).
[0043] In each of the examples described above, the trajectory of the rods (2) is determined
by the rotation of the element (4) around the axis (A45) and by the rotation of the
element (5) around the axis of the respective connection hinge with a fixed part of
the machine (M) which can be, for example, a side (30) of the latter or a superstructure
(32) placed at a higher level of the winding roller (1) with respect to the base on
which the machine rests.
[0044] In practice, the details of execution can however vary in an equivalent manner as
regards the individual elements described and illustrated without thereby abandoning
the technical solution adopted and therefore remaining within the limits of the protection
conferred by this patent in accordance with the attached claims.
1. Winding machine for forming reels of web-like material, comprising a winding roller
(1) on which the web-like material intended to be wound passes, wherein the winding
roller (1) cooperates with a winding rod (2) on which the web-like material winds
up to form a reel (B), wherein the winding roller (1) is positioned in a structure
(3) provided with sides (30) on which two corresponding linear guides (31) are formed
parallel to each other and oriented according to a predetermined direction (L) which
defines a direction of advancement of the winding rod (2) while the respective reel
(B) is forming on the rod itself, wherein the winding roller (1) is oriented transversely
to said sides, wherein the machine (M) is served by a storage (32) in which several
winding rods (2) can be stored and by a mechanism of removal of the rods (2) from
the storage (32), and wherein said mechanism of removal of the rods comprises a pair
of arms (45) each of which is arranged on a corresponding side of the machine, characterized in that each of said arms (45) consists of two elements (4, 5) hinged to each other with
a hinge axis (A45) parallel to the rotation axis (1A) of the winding roller (1), an
element (5) being hinged on one side of the machine with a hinge axis parallel to
the axis (1A) of the winding roller (1), the other element (4) being provided with
gripping means (42) adapted to engage a corresponding end (20) of a rod (2) on the
storage (32), and to move it towards the winding roller (1) and along a pre-determined
path (T) that comprises a section parallel to the outer surface of the winding roller
(1).
2. Machine according to claim 1 wherein said path (T) comprises a further section parallel
to the guides (31).
3. Machine according to claim 1 wherein said elements (4, 5) of each arm (45) are each
controlled by a corresponding actuator (M4, M5).
4. Machine according to claim 1 wherein said elements (4, 5) of each arm (45) consist
of metal plates with a predominantly longitudinal development.
5. Machine according to claim 1 wherein an element (5) of each arm (45) is hinged on
the machine (M) with a hinge axis coinciding with the axis (1A) of the winding roller
(1).
6. Machine according to claim 1, wherein the storage (32) of the rods (2) consists of
a superstructure of the machine (M) arranged above the winding roller (1), and an
element (5) of each arm (45) is hinged on said superstructure with a hinge axis parallel
to the axis (1A) of the winding roller (1).
7. Machine according to claim 1 wherein said gripping means (42) are grippers with two
jaws which, in cooperation with each other, define a gripping seat.
8. Machine according to claim 7 wherein said gripper means comprise a fixed jaw formed
on one end of an element (4) of the arm (45) and a mobile jaw (420) controlled by
an actuator (43).
9. Machine according to claim 7 wherein the fixed jaw has a concave side (421) facing
the movable jaw (420) and the movable jaw (420) has a concave side (422) facing the
fixed jaw.
10. Machine according to any of the preceding claims, wherein said arms (45) are controlled
by a programmable unit (UE) which receives signals from load cells (C4, C5) mounted
on the two elements (4, 5) of each arm and which controls the rotation of these elements
through corresponding actuators (M4, M5).
11. Machine according to any one of the preceding claims, that, comprises a carriage (6)
mounted on each of its sides and provided with gripping means (60) adapted to pick
up the rods (2) from the said arms (45).
12. Machine according to claims 1 and 2 wherein said movement along the predetermined
path (T) is given by the coordinated rotation of said elements (4, 5) around said
axes (A45) and (1A).
13. Machine according to any one of the preceding claims, wherein each of said arms (45)
is provided with a rotary actuator (7) adapted to engage a corresponding end (20)
of a rod (2) to control its rotation with predetermined angular speed around the relative
longitudinal axis.
14. Machine according to claim 13 characterized in that said rotary actuator (7) is supported by a bracket (70) arranged on an external side
of the first element (4) of the arm (45) and has a shaft outlet, oriented parallel
to the axis (A45) of the hinge connecting the first and second elements of the arm
itself, and facing the gripping means (42), said rotary actuator being mounted on
a carriage (72) to allow its movement on the bracket (70), from and to the side of
the arm (45) on which the gripping means (42) are mounted.
1. Wickelmaschine zum Ausbilden von Rollen aus bahnförmigem Material, umfassend eine
Wickelwalze (1), auf der das aufzuwickelnde bahnförmige Material läuft, wobei die
Wickelwalze (1) mit einer Wickelstange (2) zusammenwirkt, auf der sich das bahnförmige
Material aufwickelt, um eine Rolle (B) auszubilden,wobei die Wickelwalze (1) in einer
Struktur (3) positioniert ist, die mit Seiten (30) versehen ist, an denen zwei entsprechende
lineare Führungen (31) parallel zueinander ausgebildet und gemäß einer vorbestimmten
Richtung (L) orientiert sind, die eine Richtung des Vorschubs der Wickelstange (2)
definiert, während sich die jeweilige Rolle (B) auf der Stange selbst ausbildet, wobei
die Wickelwalze (1) quer zu den Seiten orientiert ist, wobei die Maschine (M) von
einem Lager (32), in dem mehrere Wickelstangen (2) gelagert werden können, und durch
einen Mechanismus zum Entfernen der Stangen (2) aus dem Lager (32) versorgt wird,
und wobei der Mechanismus zum Entfernen der Stangen ein Paar Arme (45) umfasst, von
denen jeder auf einer entsprechenden Seite der Maschine angeordnet ist, dadurch gekennzeichnet, dass jeder der Arme (45) aus zwei Elementen (4, 5) besteht, die miteinander mit einer
Gelenkachse (A45) parallel zur Rotationsachse (1A) der Wickelwalze (1) gelenkig verbunden
sind, wobei ein Element (5) an einer Seite der Maschine mit einer Gelenkachse parallel
zur Achse (1A) der Wickelwalze (1) gelenkig angebracht ist, wobei das andere Element
(4) mit Greifmitteln (42) versehen ist, die ausgelegt sind, um mit einem entsprechenden
Ende (20) einer Stange (2) im Lager (32) einzugreifen und sie in Richtung der Wickelwalze
(1) und entlang einer vorbestimmten Bahn (T) zu bewegen, die einen Abschnitt parallel
zu der Außenfläche der Wickelwalze (1) umfasst.
2. Maschine nach Anspruch 1, wobei die Bahn (T) einen weiteren Abschnitt parallel zu
den Führungen (31) umfasst.
3. Maschine nach Anspruch 1, wobei die Elemente (4, 5) jedes Arms (45) jeweils durch
ein entsprechendes Stellglied (M4, M5) gesteuert werden.
4. Maschine nach Anspruch 1, wobei die Elemente (4, 5) jedes Arms (45) aus Metallplatten
mit einer überwiegenden Längserstreckung bestehen.
5. Maschine nach Anspruch 1, wobei ein Element (5) jedes Arms (45) an der Maschine (M)
gelenkig angebracht ist, wobei eine Gelenkachse mit der Achse (1A) der Wickelwalze
(1) zusammenfällt.
6. Maschine nach Anspruch 1, wobei das Lager (32) der Stangen (2) aus einem Aufbau der
Maschine (M) besteht, der oberhalb der Wickelwalze (1) angeordnet ist, und ein Element
(5) jedes Arms (45) an dem Aufbau mit einer Gelenkachse parallel zur Achse (1A) der
Wickelwalze (1) gelenkig angebracht ist.
7. Maschine nach Anspruch 1, wobei die Greifmittel (42) Greifer mit zwei Backen sind,
die miteinander zusammenwirkend einen Greifsitz definieren.
8. Maschine nach Anspruch 7, wobei die Greifmittel eine feststehende Backe, die an einem
Ende eines Elements (4) des Arms (45) ausgebildet ist, und eine bewegliche Backe (420)
umfassen, die von einem Stellglied (43) gesteuert wird.
9. Maschine nach Anspruch 7, wobei die feststehende Backe eine konkave Seite (421) aufweist,
die der beweglichen Backe (420) zugewandt ist, und die bewegliche Backe (420) eine
konkave Seite (422) aufweist, die der feststehenden Backe zugewandt ist.
10. Maschine nach einem der vorangehenden Ansprüche, wobei die Arme (45) durch eine programmierbare
Einheit (UE) gesteuert werden, die Signale von Kraftaufnehmern (C4, C5) empfängt,
die an den zwei Elementen (4, 5) jedes Arms montiert sind, und die die Drehung dieser
Elemente durch entsprechende Stellglieder (M4, M5) steuert.
11. Maschine nach einem der vorangehenden Ansprüche, die einen Schlitten (6) umfasst,
der an jeder seiner Seiten montiert und mit Greifmitteln (60) versehen ist, die ausgelegt
sind, um die Stangen (2) von den Armen (45) aufzunehmen.
12. Maschine nach den Ansprüchen 1 und 2, wobei die Bewegung entlang der vorbestimmten
Bahn (T) durch die koordinierte Drehung der Elemente (4, 5) um die Achsen (A45) und
(1A) vorgegeben ist.
13. Maschine nach einem der vorangehenden Ansprüche, wobei jeder der Arme (45) mit einem
Dreh-Stellglied (7) versehen ist, das ausgelegt ist, um mit einem entsprechenden Ende
(20) einer Stange (2) in Eingriff zu kommen, um ihre Drehung mit einer vorbestimmten
Winkelgeschwindigkeit um die relative Längsachse zu steuern.
14. Maschine nach Anspruch 13, dadurch gekennzeichnet, dass das Dreh-Stellglied (7) von einer Halterung (70) getragen wird, die an einer Außenseite
des ersten Elements (4) des Arms (45) angeordnet ist und einen Wellenausgang aufweist,
der parallel zu der Achse (A45) des Gelenks orientiert ist, das das erste und das
zweite Element des Armes selbst verbindet, und den Greifmitteln (42) zugewandt ist,
wobei das Dreh-Stellglied auf einem Schlitten (72) montiert ist, um seine Bewegung
auf der Halterung (70) von und zu der Seite des Arms (45), an dem die Greifmittel
(42) montiert sind, zu ermöglichen.
1. Machine d'enroulement pour former des bobines de matériaux en forme de bande, comprenant
un rouleau d'enroulement (1) sur lequel passe le matériau en forme de bande destiné
à être enroulé, ledit rouleau d'enroulement (1) coopérant avec une tige d'enroulement
(2) sur laquelle le matériau en forme de bande s'enroule pour former une bobine (B),
ledit rouleau d'enroulement (1) étant positionné dans une structure (3) dotée de côtés
(30) sur lesquels deux guides linéaires correspondants (31) sont formés parallèlement
l'un à l'autre et orientés selon une direction prédéfinie (L) qui définit une direction
d'avancement de la tige d'enroulement (2) pendant que la bobine respective (B) est
en cours de formation sur la tige elle-même, ledit rouleau d'enroulement (1) étant
orienté transversalement auxdits côtés, ladite machine (M) étant desservie par un
dispositif de stockage (32) dans lequel plusieurs tiges d'enroulement (2) peuvent
être stockées et par un mécanisme de retrait des tiges (2) du dispositif de stockage
(32), et ledit mécanisme de retrait des tiges comprenant une paire de bras (45) dont
chacun est agencé sur un côté correspondant de la machine, caractérisée en ce que chacun desdits bras (45) est constitué de deux éléments (4, 5) articulés l'un à l'autre
avec un axe d'articulation (A45) parallèle à l'axe de rotation (1A) du rouleau d'enroulement
(1), un élément (5) étant articulé sur un côté de la machine avec un axe d'articulation
parallèle à l'axe (1A) du rouleau d'enroulement (1), l'autre élément (4) étant doté
de moyens de préhension (42) adaptés pour se mettre en prise avec une extrémité correspondante
(20) d'une tige (2) sur le dispositif de stockage (32), et à la déplacer vers le rouleau
d'enroulement (1) et le long d'un trajet prédéfini (T) qui comprend une section parallèle
à la surface externe du rouleau d'enroulement (1).
2. Machine selon la revendication 1, ledit trajet (T) comprenant une section supplémentaire
parallèle aux guides (31).
3. Machine selon la revendication 1, lesdits éléments (4, 5) de chaque bras (45) étant
commandés chacun par un actionneur correspondant (M4, M5).
4. Machine selon la revendication 1, lesdits éléments (4, 5) de chaque bras (45) étant
constitués de plaques métalliques à développement essentiellement longitudinal.
5. Machine selon la revendication 1, un élément (5) de chaque bras (45) étant articulé
sur la machine (M) avec un axe d'articulation coïncidant avec l'axe (1A) du rouleau
d'enroulement (1).
6. Machine selon la revendication 1, ledit dispositif de stockage (32) des tiges (2)
étant constitué d'une superstructure de la machine (M) agencée au-dessus du rouleau
d'enroulement (1), et un élément (5) de chaque bras (45) étant articulée sur ladite
superstructure avec un axe d'articulation parallèle à l'axe (1A) du rouleau d'enroulement
(1).
7. Machine selon la revendication 1, lesdits moyens de préhension (42) étant des pinces
avec deux mâchoires qui, en coopération l'une avec l'autre, définissent un siège de
préhension.
8. Machine selon la revendication 7, lesdits moyens de préhension comprenant une mâchoire
fixe formée sur une extrémité d'un élément (4) du bras (45) et une mâchoire mobile
(420) commandée par un actionneur (43).
9. Machine selon la revendication 7, ladite mâchoire fixe possédant un côté concave (421)
faisant face à la mâchoire mobile (420) et ladite mâchoire mobile (420) possédant
un côté concave (422) faisant face à la mâchoire fixe.
10. Machine selon l'une quelconque des revendications précédentes, lesdits bras (45) étant
commandés par une unité programmable (UE) qui reçoit des signaux en provenance de
cellules de charge (C4, C5) montées sur les deux éléments (4, 5) de chaque bras et
qui commande la rotation de ces éléments par l'intermédiaire d'actionneurs correspondants
(M4, M5).
11. Machine selon l'une quelconque des revendications précédentes, qui comprend un chariot
(6) monté sur chacun de ses côtés et doté de moyens de préhension (60) adaptés pour
saisir les tiges (2) à partir desdits bras (45).
12. Machine selon les revendications 1 et 2, ledit mouvement le long du trajet prédéfini
(T) étant donné par la rotation coordonnée desdits éléments (4, 5) autour desdits
axes (A45) et (1A).
13. Machine selon l'une quelconque des revendications précédentes, chacun desdits bras
(45) étant doté d'un actionneur rotatif (7) adapté pour se mettre en prise avec une
extrémité correspondante (20) d'une tige (2) pour commander sa rotation avec une vitesse
angulaire prédéfinie autour de l'axe longitudinal relatif.
14. Machine selon la revendication 13 caractérisée en ce que ledit actionneur rotatif (7) est supporté par un support (70) agencé sur un côté
externe du premier élément (4) du bras (45) et possède une sortie d'arbre, orientée
parallèlement à l'axe (A45) de l'articulation reliant les premier et second éléments
du bras lui-même, et faisant face aux moyens de préhension (42), ledit actionneur
rotatif étant monté sur un chariot (72) pour permettre son déplacement sur le support
(70), à partir du côté du bras (45) et vers celui-ci, sur lequel les moyens de préhension
(42) sont montés.