FIELD OF THE INVENTION
[0001] The present invention relates to a printing machine, and more particularly to a rotary
printing machine, with which a workpiece can be printed only once or be repeated printed
multiple times in a continuous manner.
BACKGROUND OF THE INVENTION
[0002] Generally, a screen printing machine includes only one clamping unit on a printing
cylinder thereof. When the clamping unit is located at a feeding position, it clamps
a workpiece in place on the printing cylinder. Then, the printing cylinder continuously
rotates and brings the workpiece to a position corresponding to a screen carrier,
and the screen carrier is caused to move horizontally while the printing cylinder
rotates, so that a printed pattern is formed on the workpiece that is located between
the printing cylinder and the screen carrier. Thereafter, when the workpiece is moved
to an unloading position, the clamping unit releases the workpiece, so that the workpiece
leaves from the printing cylinder and the screen printing procedure is completed.
Thereafter, the printing cylinder keeps rotating and reaches at the feeding position
again. At this point, the clamping unit is in an open state and ready for clamping
a next workpiece. Since the screen printing machine with one single clamping unit
can complete only one printing operation when the printing cylinder rotates a full
circle of 360 degrees, the printing efficiency thereof is very low.
[0003] To improve the performance of the conventional screen printing machine, an improved
screen printing machine 1 with multiple clamping units as shown in Fig. 1 has been
introduced into the market. Please refer to Fig. 1. The improved screen printing machine
1 includes a printing cylinder 10, a screen carrier 11, a first clamping unit 12,
a second clamping unit 13, a first servomotor 14, a second servomotor 15, and a controller
16. The first servomotor 14 and the second servomotor 15 are driven by the controller
16 to synchronously move the screen carrier 11 and the printing cylinder 10, respectively.
The first clamping unit 12 and the second clamping unit 13 are located at two diametrically
opposite positions on the printing cylinder 10.
[0004] When the printing starts, the first clamping unit 12 located at a feeding position
is in an open state, allowing a workpiece to be moved into the first clamping unit
12. Then, the first clamping unit 1 is closed, bringing the workpiece to move circumferentially
along with the rotating printing cylinder 10. Then, printing and unloading procedures
are sequentially performed. When the first clamping unit 12 completes the unloading
procedure, the second clamping unit 13 is located at the feeding position and ready
for clamping a next workpiece. When the second clamping unit 13 completes the printing
and the unloading procedures, the first clamping unit 12 is returned to the feed position
again and starts a new cycle of clamping, printing and unloading procedures. That
is, the improved screen printing machine 1 is able to complete printing on two workpieces
when the printing cylinder 10 rotates one full circle of 360 degrees. This largely
increases the printing efficiency of the screen printing machine.
[0005] However, most screen printing machines available in the market are designed for the
workpiece to be printed only once. That is, the printed pattern formed on the workpiece
is a two-dimensional pattern having one single layer of ink. Therefore, when the conventional
screen printing machine is to be used to form a three-dimensional printed pattern
including multiple layers of ink on the workpiece, the workpiece must be manually
removed from an unloading unit of the screen printing machine each time one printing
procedure is completed and then, be manually put in a feeding unit of the screen printing
machine to repeat the screen printing until the three-dimensional printed pattern
is obtained. By doing this, the time for printing is increased and it is uneasy to
control the accuracy of manual printing registration. Accordingly, the printing quality
and productivity are relatively low, and the complicated procedures for the three-dimensional
printing also largely increase the cost of the screen printed pattern. In view that
the conventional screen printing machine has a lot of disadvantage in use, it is really
desirable to improve the structure of the currently available rotary screen printing
machine.
[0006] WO 2006/051558 A1 discloses a rotary printing machine according to the preamble of claim 1. In particular,
WO 2006/051558 A1 discloses a screen-printing machine comprising a servo-controlled motion of the frame
and cylinder. Independent drives for the frame and the stop cylinder, synchronized
by sophisticated controls and software are provided. By this arrangement the registration
of papers occurs precisely because the screen frame stops at a more accurate position.
The stop cylinder is also provided with a double diameter construction with two sets
of grippers, which are arranged at 180 degrees apart from each other. This construction
is advantageous since the cylinder rotates only 180 degrees for every print cycle.
A dump gate is also provided for separating unprinted stock. When the paper is not
aligned properly the sensors present near the two sets of grippers in the cylinder
and near the side lays of the feedboard send a signal to the dump gate through a solenoid
valve and prevents the paper to be printed and thus is passed through the dump gate
into a separate bin, thus minimizing paper and ink wastage
SUMMARY OF THE INVENTION
[0007] A primary object of the present invention is to provide a rotary printing machine,
with which a workpiece can be printed only once or be repeatedly print multiple times
in a continuous manner, so that only one rotary printing machine is needed to print
on a workpiece for forming a two-dimensional printed pattern with one single layer
of ink or forming a three-dimensional printed pattern with multiple stacked layers
of ink, depending on actual need in use. Therefore, the rotary printing machine can
have increased applications and the conventional complicated procedures for creating
a three-dimensional printed pattern can be simplified.
[0008] Another object of the present invention is to provide a rotary printing machine,
of which a printing cylinder has a plurality of clamping units provided thereon, so
that multiple workpieces can be printed in one revolution of the printing cylinder
to largely upgrade the printing efficiency of the rotary printing machine.
[0009] To achieve the above objects, the rotary printing machine provided according to the
present invention is defined in claim 1. The rotary printing machine includes a printing
cylinder, a printing unit, a feeding control mechanism and an unloading control mechanism.
By controlling the feeding control mechanism and the unloading control mechanism corresponding
to the rotation of the printing cylinder, a workpiece can be printed only once or
be repeatedly printed multiple times in a continuous manner.
[0010] In the present invention, the printing cylinder is provided on a surface thereof
with at least one clamping unit. The clamping unit includes a rotary shaft, on which
a swing member, a reset unit and a plurality of clampers are provided. The clampers
are maintained in a closed state on the surface of the printing cylinder, and can
be switched to an open state when the rotary shaft of the clamping unit is rotated.
When the clampers are in the closed state, a clamping surface formed by the clampers
overlaps with the surface of the printing cylinder to provide a clamping effect. When
the clampers are in the open state, an angle is formed between the clamping surface
of the clampers and the surface of the printing cylinder to provide a releasing effect.
[0011] In a preferred embodiment of the present invention, the clamper includes a clamping
section and a pushing section, both of which are fixedly mounted on the rotary shaft.
The pushing section overlaps with the printing cylinder when the rotary shaft is acted
on by the feeding control unit. On the other hand, an angle is formed between the
pushing section and the surface of the printing cylinder when the rotary shaft is
acted on by the unloading control unit. An angle formed between the clamping unit
and the printing cylinder when the rotary shaft is acted on by the feeding control
mechanism is different from an angle that is formed between the clamping section and
the printing cylinder when the rotary shaft is acted on by the unloading control mechanism.
[0012] In the present invention, the printing unit is located over and adjacent to the surface
of the printing cylinder for performing printing on the workpiece in cooperation with
the printing cylinder. In an operable embodiment, the printing unit uses an inkjet
member to jet ink directly onto the workpiece. In another operable embodiment, the
printing unit uses a screen carrier to perform screen printing on the workpiece.
[0013] In the present invention, the feeding control mechanism includes a driving source,
a feeding linkage and a feeding control unit. The driving source drives the feeding
linkage to change between a first position, in which the feeding linkage can touch
the swing member when the printing cylinder is rotating, and a second position, in
which the feeding linkage can not touch the swing member when the printing cylinder
is rotating. The feeding control unit separates the feeding linkage from the driving
source, such that the feeding linkage is maintained at the second position.
[0014] In a preferred embodiment, the driving source is configured as a cam. The cam has
a first curved portion and a second curved portion that are different in curvature.
The clampers are brought to quickly change from the closed state into the open state
when the first curved portion and the second curved portion of the cam sequentially
act on the feeding linkage; and the clampers are brought to change from the open state
into the closed state when the second curved portion and the first curved portion
of the cam sequentially act on the feeding linkage.
[0015] The feeding linkage includes a first link and a second link. The first and the second
link are fixedly connected to each other at their adjacent ends, which together form
a pivot center. The driving source and the feeding control unit are operatively mounted
on the first link, and another opposite end of the second link is movable to touch
the swing member for rotating the rotary shaft.
[0016] The second link includes a swing link body, a push head connected to one side of
a distal end of the swing link body for causing the swing member to swing, and a length-adjustment
mechanism located between the swing link body and the push head.
[0017] The length-adjustment mechanism includes a first limiting rail and a first locking
member. The first limiting rail is formed on one of the swing link body and the push
head while the first locking member is mounted the other one of the swing link body
and the push head; and the push head is movable in along the first limiting rail to
thereby change an overall length of the second link.
[0018] In the present invention, the feeding control unit includes a first driving unit
and a first controller. The first driving unit is in a retracted state, and the first
controller is electrically connected to the first driving unit for controlling the
first driving unit to change from the retracted state into an extended state.
[0019] The unloading control mechanism includes an unloading unit and an unloading control
unit. The unloading unit is mounted to the first position, in which the unloading
unit can touch the swing member when the printing cylinder is rotating; and the unloading
control unit switches the unloading unit from the first position to the second position,
in which the unloading unit can not touch the swing member when the printing cylinder
is rotating.
[0020] The unloading unit has an end fixed to the printing cylinder to serve as a pivot
center and another opposite end connected to the unloading control unit. A raised
area is formed on the unloading unit between the pivot center and the unloading control
unit, and the raised area is higher than other areas of the unloading unit located
at two lateral sides of the raised area.
[0021] The unloading unit includes a curved arm portion, a raised arm portion that forms
the raised area, and a position-adjustment mechanism formed on between the curved
arm portion and the raised arm portion.
[0022] The position-adjustment mechanism includes a second limiting rail and a second locking
member. The second limiting rail is formed on one of the curved arm portion and the
raised arm portion while the second locking member is mounted on the other one of
the curved arm portion and the raised arm portion. The raised arm portion is movable
in along the second limiting rail when the second locking member is in a loosened
state, enabling a change in a connection position of the raised arm portion relative
to the curved arm portion.
[0023] The unloading control unit includes a second driving unit and a second controller.
The second driving unit is in an extended state, and the second controller is electrically
connected to the second driving unit for controlling the second driving unit to change
from the extended state into a retracted state.
[0024] When the first driving unit of the rotary printing machine of the present invention
is controlled to the retracted state and the second driving unit is controlled to
the extended state, the printing cylinder can circumferentially move the workpiece
for the printing unit to print on the workpiece once only. On the other hand, when
the first driving unit of the rotary printing machine of the present invention is
controlled to the extended state and the second driving unit is controlled to the
retracted state, the printing cylinder can circumferentially move the workpiece for
the printing unit to repeat printing on the workpiece multiple times in a continuous
manner.
[0025] In a preferred embodiment, the rotary printing machine can further include a drying
unit disposed over the unloading control mechanism for curing ink that has been printed
onto the workpiece to form a pattern, so that the cured printed pattern is stably
held to the workpiece. After the curing operation, the workpiece is still in a clamped
state and attached to the printing cylinder, so as to be circumferentially moved by
the rotating printing cylinder for a next printing operation. The same steps are repeated
multiple times to form a user-required three-dimensional printed pattern on the workpiece.
In a preferred embodiment, the drying unit is configured as an ultraviolet (UV) lamp.
[0026] The rotary printing machine of the present invention is characterized in that the
clamping units provided on the printing cylinder work in cooperation with the mechanically
operated feeding control mechanism and unloading control mechanism, it is therefore
possible to determine the operating states of the clamping units at the feeding position
and the unloading position. With these arrangements, the workpiece on the rotary printing
machine can be printed only once without the need of adjusting the rotary printing
machine. On the other hand, when the workpiece on the rotary printing machine is to
be repeatedly printed multiple times, simply adjust the feeding control mechanism
and the unloading control mechanism for the clamping units to maintain the clamped
state, and a three-dimensional printed pattern with multiple layers of ink can be
formed on the workpiece.
[0027] Moreover, in the rotary printing machine of the present invention, the use of dual
clamping units along with the inkjet member or a screen carrier enables a fully automatic
three-dimensional electronic printing operation, which can effectively reduce the
labor and time costs to upgrade the printing efficiency.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The structure and the technical means adopted by the present invention to achieve
the above and other objects can be best understood by referring to the following detailed
description of the preferred embodiment and the accompanying drawings, wherein
Fig. 1 is a side view of a conventional rotary screen printing machine with two clamping
units;
Fig. 2 is a perspective view of a rotary printing machine according to a preferred
embodiment of the present invention;
Fig. 3 is an exploded perspective view of a printing cylinder for the rotary printing
machine of Fig. 2;
Fig. 4 shows a clamping unit of the rotary printing machine of the present invention
maintains a clamped state when it is moved to a feeding position on the machine;
Fig. 5 shows the clamping unit of the rotary printing machine of the present invention
is changed from the clamped state into an open state;
Fig. 6 shows the clamping unit of the rotary printing machine of the present invention
is changed from the open state into the clamped state;
Fig. 7 shows the clamping unit of the rotary printing machine of the present invention
is changed into the open state when it is moved to an unloading position on the machine;
Fig. 8 is a perspective view of a feeding control mechanism for the rotary printing
machine of Fig. 2;
Fig. 9 is a side view showing the feeding control mechanism and an unloading control
mechanism of the rotary printing machine of the present invention are respectively
located at a position contactable with the clamping unit;
Fig. 10 is an exploded perspective view of the feeding control mechanism of Fig. 8;
Fig. 11 shows the manner of adjusting an overall length of a feeding linkage of the
feeding control mechanism of Fig. 8;
Fig. 12 is a side view showing the feeding control mechanism and the unloading control
mechanism of the rotary printing machine of the present invention are respectively
located at a position non-contactable with the clamping unit;
Fig. 13 is an assembled perspective view of the unloading control mechanism for the
rotary printing machine of Fig. 2;
Fig. 14 is an exploded view of the unloading control mechanism of Fig. 13; and
Fig. 15 shows the manner of adjusting the position of an unloading unit of the unloading
control mechanism of Fig. 13.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0029] The present invention will now be described with a preferred embodiment thereof and
by referring to the accompanying drawings.
[0030] Please refer to Fig. 2. A rotary printing machine 2 according to a preferred embodiment
of the present invention is mainly characterized by improving a printing mechanism
located between a feeding mechanism and an unloading mechanism, so that the rotary
printing machine 2 can be selectively operated for a workpiece 3 to be printed only
once or be repeatedly printed multiple times in a continuous manner. The rotary printing
machine 2 of the present embodiment includes a printing cylinder 4, a printing unit
5, a feeding control mechanism 6, an unloading control mechanism 7, and a drying unit
8.
[0031] The printing cylinder 4 is driven to rotate by a servomotor (not shown), which enables
precisely controlled rotational speed and accuracy of the printing cylinder 4. The
printing unit 5 is installed over the printing cylinder 4 and located adjacent to
a printing surface A of the printing cylinder 4. The printing unit 5 performs printing
on the workpiece 3 corresponding to the rotation of the printing cylinder 4. In the
embodiment illustrated in Fig. 2, the printing unit 5 uses an inkjet member to jet
ink directly onto the workpiece 3. In another operable embodiment, the printing unit
5 uses a screen carrier, which is driven to move by another servomotor, to perform
screen printing on the workpiece 3.
[0032] The feeding control mechanism 6 and the unloading control mechanism 7 are mounted
to a non-printing surface B located at one lateral side of the printing cylinder 4.
The drying unit 8 is disposed over the unloading control mechanism 7 for performing
an ink curing operation on the workpiece 3 that has printed patterns formed thereon.
[0033] The printing cylinder 4 includes a driving shaft 40, a cylinder body 41, and at least
one clamping unit 42. In an operable embodiment, two clamping units 42 are provided
on the cylinder body 41 at two diametrically opposite positions thereof. With these
arrangements, the printing on two workpieces 3 can be completed in one revolution
of the cylinder body 41. However, it is understood the provision of two clamping units
42 is only illustrative. That is, the designed number of the clamping units 42 can
be three, four or more, depending on actual need.
[0034] Please refer to Fig. 3. The cylinder body 41 has two recessed areas 411 formed on
a circumferential surface thereof. The two clamping units 42 are separately installed
in the two recessed areas 411. Each of the clamping units 42 includes a rotary shaft
43, which is connected to a position of the cylinder body 41 close to the circumferential
surface thereof. At least one reset unit 44 and a plurality of clampers 45 are provided
on one side of the rotary shaft 43 that faces toward the printing surface A. And,
a swing member 46 is provided on an end of the rotary shaft 43 facing toward the non-printing
surface B of the printing cylinder 4. The swing member 46, the feeding control mechanism
6 and the unloading control mechanism 7 are located at the same lateral side of the
cylinder body 41.
[0035] Please refer to Figs. 4, 5 and 6. When the rotary shaft 43 is in an initial state
as shown in Fig. 4, it is acted on by the reset units 44, such that the clampers 45
are maintained in a closed state, in which the workpiece 3 could not be fed into the
clampers 45. When the clampers 45 are in the closed state, a clamping surface formed
by the clampers 45 is locate adjacent to the circumferential surface of the cylinder
body 41 to provide a clamping effect. When the rotary shaft 43 is rotated, the clampers
45 are brought to change from the closed state into an open state, allowing the workpiece
3 to be fed into or released from the clampers 45. When the clampers 45 are in the
open state, an angle is formed between the clamping surface of the clampers 45 and
the circumferential surface of the cylinder body 41 to provide a releasing effect.
[0036] Referring to Fig. 5. When the swing member 46 is brought by the feeding control mechanism
6 or the unloading control mechanism 7 to swing, the rotary shaft 43 is further brought
by the swing member 46 to rotate, causing the clampers 45 to change from the closed
state into the open state. Meanwhile, the reset unit 44 is caused to produce a resetting
force.
[0037] As shown in Fig. 6, when the swing member 46 is no longer acted on by the feeding
control mechanism 6 or the unloading control mechanism 7, the rotary shaft 43 is subjected
to the resetting force of the reset unit 44 and returned from the open state to the
closed state, bringing the clampers 45 to clamp the workpiece 3 thereto.
[0038] In an operable embodiment of the present invention, each of the clampers 45 includes
a clamping section 451 and a pushing section 452, both of which are fixedly mounted
on the rotary shaft 43. The clamping section 451 and the pushing section 452 are spaced
from each other, so that a receiving space 453 is formed between them and the workpiece
3 can be fed into the receiving space 453. The reset unit 44 includes a fixing seat
441 and an elastic element 442. The fixing seat 441 is fixedly fitted on the rotary
shaft 43. The elastic element 442 has two ends separately pressing against the fixing
seat 441 and a surface of the printing cylinder 4, such that the elastic element 442
always pushes against the fixing seat 441.
[0039] When the rotary shaft 43 is acted on by the feeding control mechanism 6, the pushing
section 452 overlaps with the printing cylinder 4 while a first angle is formed between
the clamping section 451 and the surface of the printing cylinder 4. As can be seen
Fig. 7, when the rotary shaft 43 is acted on by the unloading control mechanism 7,
a second angle is formed between the pushing section 452 and the clamping section
451 and the surface of the printing cylinder 4. The second angle is larger than the
first angle,
[0040] Referring to Fig. 8. When the printing cylinder 4 is rotated in a printing operation,
the feeding control mechanism 6 can be selectively controlled to touch or not to touch
the swing member 46 when the clamping unit 42 on the rotating printing cylinder 4
is moved to a feeding position, so that the swing member 46 is swung or not swung.
The feeding control mechanism 6 includes a driving source 60, a feeding linkage 61,
and a feeding control unit 62.
[0041] As shown in Fig. 9, the feeding linkage 61 is located adjacent to the driving source
60 and is driven by the driving source 60 to change between a first position 90, in
which the feeding control mechanism 6 can touch the swing member 46, and a second
position 91, in which the feeding control mechanism 6 can not touch the swing member
46. The arrow in Fig. 9 that radially outward extends from the dashed circle 92 indicates
the first position 90, while the arrow radially inward extends from the dashed circle
92 indicates the second position 91.
[0042] The feeding control unit 62 is connected to the feeding linkage 61 for separating
the feeding linkage 61 from the driving source 60, so that the feeding linkage 61
is maintained at the second position 91 without touching the swing member 46.
[0043] In a preferred embodiment as shown in Fig. 8, the driving source 60 is configured
as a cam 601. The feeding linkage 61 has a first link 611 and a second link 612, which
are integrally formed to present an L-shape. The first link 611 is contactable with
the driving source 60 to move along with the driving source 60. The feeding control
unit 62 includes a first driving unit 621 and a first controller 622. The first driving
unit 621 is connected to between the first controller 622 and the first link 611.
The first controller 622 can change the first driving unit 621 between a retracted
state and an extended state and thereby causes the first link 611 to change in position.
The first driving unit 621 can be a pneumatic cylinder, a hydraulic cylinder or a
motor.
[0044] The cam 601 has a first curved portion 602 and a second curved portion 603, which
are different in curvature. The first curved portion 602 has a curvature larger than
that of the second curved portion 603. Therefore, when the first curved portion 602
and the second curved portion 603 of the cam 601 sequentially act on the feeding linkage
61, the clampers 45 are brought to quickly change from the closed state into the open
state. On the other hand, when the second curved portion 603 and the first curved
portion 602 of the cam 601 sequentially act on the feeding linkage 61, the clampers
45 are brought to gently change from the open state into the closed state.
[0045] The first link 611 and the second link 612 are pivotally connected at their adjacent
ends to a fixed bar 613 to form a pivot center at the adjacent ends. Another opposite
end of the second link 612 can bring the swing member 46 to swing.
[0046] Please refer to Figs. 10 and 11. The second link 612 includes a swing link body 614,
a push head 615 connected to one side of a distal end of the swing link body 614 for
causing the swing member 46 to swing, and a length-adjustment mechanism 616 located
between the swing link body 614 and the push head 615.
[0047] The length-adjustment mechanism 616 includes a first limiting rail 617 and a first
locking member 618 extended into the first limiting rail 617. The first limiting rail
617 can be formed on one of the swing link body 614 and the push head 615 while the
first locking member 618 is mounted on the other one of the swing link body 614 and
the push head 615.
[0048] The first locking member 618 includes a first bolt 619 and a first fastening element
(not shown). When the first fastening element is loosened from the first bolt 619,
the push head 615 can be moved in along the first limiting rail 617 relative to the
swing link body 614, so as to change an overall length and an angular position of
the second link 612. In this manner, it is able to control the size of the angle formed
between the clampers 45 and the cylinder body 41 when the clampers 45 are in the open
state.
[0049] Further, the first driving unit 621 is normally in a retracted state, enabling the
cam 601 and the first link 611 to maintain a contacted and linked relation between
them. Please refer to Fig. 12. When the first controller 622 changes the first driving
unit 621 from the retracted state into an extended state, the first link 611 is pushed
by the extended first driving unit 621 to move upward and accordingly separate from
the cam 601, bringing the second link 612 to swing downward at the same time to a
position unable to touch the swing member 46.
[0050] Please refer to Fig. 9. When the printing cylinder 4 is rotated in a printing operation,
the unloading control mechanism 7 can be selectively controlled to touch or not to
touch the swing member 46 when the clamping unit 42 on the rotating printing cylinder
4 is moved to an unloading position, so that the swing member 46 is swung or not swung.
The unloading control mechanism 7 includes an unloading unit 71 and an unloading control
unit 72. The unloading unit 71 is mounted to the first position 90 and is therefore
able to touch the swing member 46 when the printing cylinder 4 is rotating. The unloading
control unit 72 can switch the unloading unit 71 from the first position 90 to the
second position 91, so that the unloading unit 71 is not able to touch the swing member
46, allowing the clampers 45 to change from the open state into the closed state.
[0051] As can be seen in Fig. 13, the unloading unit 71 has an end fixedly connected to
a bar 74 with a bolt 73 to serve as a pivot center, and another opposite end of the
unloading unit 71 is locked to the unloading control unit 72 using a screw. On the
unloading unit 71, there is a raised area 710 formed between the pivot center and
the unloading control unit 72. The raised area 710 is higher than other areas of the
unloading unit 71 located at two lateral sides of the raised area 710.
[0052] As shown in Figs. 14 and 15, the unloading unit 71 includes a curved arm portion
711, a raised arm portion 712 that forms the raised area 710, and a position-adjustment
mechanism 713 formed on between the curved arm portion 711 and the raised arm portion
712.
[0053] The position-adjustment mechanism 713 includes at least one second limiting rail
714 and at least one second locking member 715. The second limiting rail 714 is formed
on one of the curved arm portion 711 and the raised arm portion 712 while the second
locking member 715 is mounted on the other one of the curved arm portion 711 and the
raised arm portion 712.
[0054] the second locking member 715 includes a second bolt 716 and a second fastening element
(not shown). When the second fastening element is loosened from the second bolt 716,
the raised arm portion 712 can be moved in along the second limiting rail 714 on the
curved arm portion 711, so as to change an overall height of the unloading unit 71.
In this manner, it is able to control the size of the angle formed between the clampers
45 and the cylinder body 41 when the clampers 45 are in the open state.
[0055] Please refer to Fig. 13 again. The unloading control unit 72 includes a second driving
unit 721 and a second controller 722. The second driving unit 721 is connected to
between the second controller 722 and the unloading unit 71. The second controller
722 can switch the second driving unit 721 between a retracted state and an extended
state and thereby causes the unloading unit 71 to change in position. Similarly, the
second driving unit 721 can be a pneumatic cylinder, a hydraulic cylinder or a motor.
When the unloading unit 71 is located at the first position 90, the second driving
unit 721 is in the extended state, as shown in Fig. 9. In the event the unloading
unit 71 is to be switched from the first position 90 to the second position 91, the
second controller 722 drives the second driving unit 721 to change from the extended
state into the retracted state, as shown in Fig. 12.
[0056] In the present invention, the drying unit 8 is configured as an ultraviolet (UV)
lamp for curing the ink that has been printed onto the workpiece 3 to form a pattern.
The ink on the workpiece 3 is cured when the UV lamp irradiates UV light to heat and
dry the ink. The cured ink is then stably held to the workpiece 3.
[0057] As shown in Fig. 9, in the case the workpiece 3 is to be printed only once on the
rotary printing machine 2 of the present invention, the first driving unit 621 is
controlled to the retracted state and the second driving unit 721 is controlled to
the extended state. At this point, the printing cylinder 4 will circumferentially
move the workpiece 3 for the printing unit 5 to print on the workpiece 3 only once.
Then, the workpiece 3 is released from the clampers 45 at the unloading position.
[0058] However, in the case the workpiece 3 is to be repeatedly printed multiple times in
a continuous manner on the rotary printing machine 2 of the present invention, the
first driving unit 621 is controlled to the extended state and the second driving
unit 721 is controlled to the retracted state. At this point, the printing cylinder
4 will circumferentially move the workpiece 3 repeatedly for the printing unit 5 to
continuously print on the workpiece 3 multiple times. When a three-dimensional pattern
formed of a predetermined ink layers has been printed on the workpiece 3, the second
driving unit 721 is switched from the retracted state to the extended state, allowing
the workpiece 3 to be released from the clampers 45 at the unloaded position.
[0059] The present invention has been described with a preferred embodiment thereof and
it is understood that many changes and modifications in the described embodiment can
be carried out without departing from the scope of the invention that is intended
to be limited only by the appended claims.
1. A rotary printing machine (2), with which a workpiece (3) can be printed only once
or be repeated printed multiple times in a continuous manner, comprising:
a printing cylinder (4) being provided with at least one clamping unit (42); the clamping
unit (42) each including a rotary shaft (43), on which a plurality of clampers (45)
are provided; the clampers (45) being maintained in a closed state and being changeable
into an open state when the rotary shaft (43) is rotated;
a printing unit (5) being located over and adjacent to a printing surface (A) of the
printing cylinder (4) for performing printing on the workpiece (3) in cooperation
with the printing cylinder (4);
a feeding control mechanism (6) including a driving source (60); and
an unloading control mechanism (7) including an unloading unit (71)
wherein the rotary printing machine (2) is characterized in that:
a swing member (46) and a reset unit (44) are provided on the rotary shaft (43) of
each of the at least one clamping unit (42);
the feeding control mechanism (6) includes a feeding linkage (61) and a feeding control
unit (62); the driving source (60) driving the feeding linkage (61) to change between
a first position (90), in which the feeding linkage (61) can touch the swing member
(46) when the printing cylinder (4) is rotating, and a second position (91), in which
the feeding linkage (61) can not touch the swing member (46) when the printing cylinder
(4) is rotating; and the feeding control unit (62) separates the feeding linkage (61)
from the driving source (60), such that the feeding linkage (61) is maintained at
the second position (91); and
the unloading control mechanism (7) includes an unloading control unit (72); the unloading
unit (71) being mounted to the first position (90), in which the unloading unit (71)
can touch the swing member (46) when the printing cylinder (4) is rotating; and the
unloading control unit (72) switches the unloading unit (71) from the first position
(90) to the second position (91), in which the unloading unit (71) can not touch the
swing member (46) when the printing cylinder (4) is rotating.
2. The rotary printing machine (2) as claimed in claim 1, wherein the driving source
(60) is configured as a cam (601); the cam (601) having a first curved portion (602)
and a second curved portion (603) that are different in curvature; the clampers (45)
being brought to quickly change from the closed state into the open state when the
first curved portion (602) and the second curved portion (603) of the cam (601) sequentially
act on the feeding linkage (61); and the clampers (45) being brought to change from
the open state into the closed state when the second curved portion (603) and the
first curved portion (602) of the cam (601) sequentially act on the feeding linkage
(61).
3. The rotary printing machine (2) as claimed in claim 1, wherein the feeding control
unit (62) includes a first driving unit (621) and a first controller (622); the first
driving unit (621) being in a retracted state, and the first controller (622) being
electrically connected to the first driving unit (621) for controlling the first driving
unit (621) to change from the retracted state into an extended state; and wherein
the unloading control unit (72) includes a second driving unit (721) and a second
controller (722); the second driving unit (721) being in an extended state, and the
second controller (722) being electrically connected to the second driving unit (721)
for controlling the second driving unit (721) to change from the extended state into
a retracted state.
4. The rotary printing machine (2) as claimed in claim 1, wherein a clamping surface
formed by the clampers (45) overlaps with the printing cylinder (4) to provide a clamping
effect when the clampers (45) are in the closed state; and an angle is formed between
the clamping surface of the clampers (45) and the surface of the printing cylinder
(4) to provide a releasing effect when the clampers (45) are in the open state.
5. The rotary printing machine (2) as claimed in claim 1, wherein each of the clampers
(45) includes a clamping section (451) and a pushing section (452), both of which
are fixedly mounted on the rotary shaft (43); the pushing section (452) overlapping
with the printing cylinder (4) when the rotary shaft (43) is acted on by the feeding
control unit (62); and an angle being formed between the pushing section (452) and
the surface of the printing cylinder (4) when the rotary shaft (43) is acted on by
the unloading control unit (72).
6. The rotary printing machine (2) as claimed in claim 1, wherein the feeding linkage
(61) includes a first link (611) and a second link (612); the first and the second
link (612) being fixedly connected to each other at their adjacent ends, which together
form a pivot center; the driving source (60) and the feeding control unit (62) being
operatively mounted on the first link (611), and another opposite end of the second
link (612) being movable to touch the swing member (46) for rotating the rotary shaft
(43).
7. The rotary printing machine (2) as claimed in claim 6, wherein the second link (612)
includes a swing link body (614), a push head (615) connected to one side of a distal
end of the swing link body (614) for causing the swing member (46) to swing, and a
length-adjustment mechanism (616) located between the swing link body (614) and the
push head (615).
8. The rotary printing machine (2) as claimed in claim 7, wherein the length-adjustment
mechanism (616) includes a first limiting rail (617) and a first locking member (618);
the first limiting rail (617) being formed on one of the swing link body (614) and
the push head (615) while the first locking member (618) being mounted the other one
of the swing link body (614) and the push head (615); and the push head (615) being
movable in along the first limiting rail (617) to thereby change an overall length
of the second link (612).
9. The rotary printing machine (2) as claimed in claim 1, wherein the unloading unit
(71) has an end fixed to the printing cylinder (4) to serve as a pivot center and
another opposite end connected to the unloading control unit (72); a raised area (710)
being formed on the unloading unit (71) between the pivot center and the unloading
control unit (72), and the raised area (710) being higher than other areas of the
unloading unit (71) located at two lateral sides of the raised area (710).
10. The rotary printing machine (2) as claimed in claim 9, wherein the unloading unit
(71) includes a curved arm portion (711), a raised arm portion (712) that forms the
raised area (710), and a position-adjustment mechanism (713) formed on between the
curved arm portion (711) and the raised arm portion (712).
11. The rotary printing machine (2) as claimed in claim 10, wherein the position-adjustment
mechanism includes a second limiting rail (714) and a second locking member (715);
the second limiting rail (714) being formed on one of the curved arm portion (711)
and the raised arm portion (712) while the second locking member (715) being mounted
on the other one of the curved arm portion (711) and the raised arm portion (712);
and the raised arm portion (712) being movable in along the second limiting rail (714)
when the second locking member (715) is in a loosened state, enabling a change in
a connection position of the raised arm portion (712) relative to the curved arm portion
(711).
12. The rotary printing machine (2) as claimed in claim 1, further comprising a drying
unit (8) disposed over the unloading control mechanism (7) for curing ink that has
been printed onto the workpiece (3) to form a pattern.
13. The rotary printing machine (2) as claimed in claim 12, wherein the drying unit (8)
is configured as an ultraviolet lamp.
14. The rotary printing machine (2) as claimed in claim 1, wherein the reset unit (44)
includes a fixing seat (441) and an elastic element (442); the fixing seat (441) being
fixedly fitted on the rotary shaft (43) and the elastic element (442) having two ends
separately pressing against the fixing seat (441) and a surface of the printing cylinder
(4), such that the elastic element (442) always pushes against the fixing seat (441).
1. Rotationsdruckmaschnine (2), mit der ein Werkstück (3) nur einmal bedruckt oder wiederholt
zahlreiche Male auf kontinuierliche Weise bedruckt werden kann, umfassend:
einen Druckzylinder (4), der mit mindestens einer Klemmeinheit (42) ausgestattet ist;
wobei die Klemmeinheit (42) jeweils eine Rotationswelle (43) einschließt, auf der
eine Vielzahl von Klemmvorrichtungen (45) bereitgestellt ist; wobei die Klemmvorrichtungen
(45) in einem geschlossenen Zustand gehalten werden und in einen offenen Zustand geändert
werden können, wenn die Rotationswelle (43) gedreht wird;
eine Druckeinheit (5), die über und benachbart einer Druckfläche (A) des Druckzylinders
(4) angeordnet ist, um den Druck auf das Werkstück (3) in Zusammenarbeit mit dem Druckzylinder
(4) durchzuführen;
einen Zufuhrsteuermechanismus (6), darin eingeschlossen eine Antriebsquelle (60);
und
einen Entladesteuermechanismus (7), darin eingeschlossen eine Entladeeinheit (71),
wobei die Rotationsdruckmaschine (2) dadurch gekennzeichnet ist, dass:
ein Schwenkelement (46) und eine Rückstelleinheit (44) auf der Rotationswelle (43)
jeder der mindestens einen Klemmeinheit (42) bereitgestellt sind;
der Zufuhrsteuermechanismus (6) eine Zufuhrverknüpfung (61) und eine Zufuhrsteuereinheit
(62) einschließt; die Antriebsquelle (60) die Zufuhrverknüpfung (61) antreibt, um
zwischen einer ersten Position (90), in der die Zufuhrverknüpfung (61) das Schwenkelement
(46) berühren kann, wenn sich der Druckzylinder (4) dreht, und einer zweiten Position
(91), in der die Zufuhrverknüpfung (61) das Schwenkelement (46) nicht berühren kann,
wenn sich der Druckzylinder (4) dreht, zu ändern; und die Zufuhrsteuereinheit (62)
die Zufuhrverknüpfung (61) von der Antriebsquelle (60) trennt, so dass die Zufuhrverknüpfung
(61) in der zweiten Position (91) beibehalten wird; und der Entladesteuermechanismus
(7) eine Entladesteuereinheit (72) einschließt,
wobei die Entladeeinheit (71) an die erste Position (90) montiert ist, in der die
Entladeeinheit (71) das Schwenkelement (46) berühren kann, wenn sich der Druckzylinder
(4) dreht; und die Entladesteuereinheit (72) die Entladeeinheit (71) aus der ersten
Position (90) in die zweite Position (91) schaltet, in der die Entladeeinheit (71)
das Schwenkelement (46) nicht berühren kann, wenn sich der Druckzylinder (4) dreht.
2. Rotationsdruckmaschine (2) nach Anspruch 1, wobei die Antriebsquelle (60) wie ein
Nocken (601) konfiguriert ist; wobei der Nocken (601) einen ersten gekrümmten Abschnitt
(602) und einen zweiten gekrümmten Abschnitt (603) aufweist, die verschieden gekrümmt
sind; wobei die Klemmvorrichtungen (45) dazu gebracht werden, sich schnell vom geschlossenen
Zustand in den offenen Zustand zu ändern, wenn der erste gekrümmte Abschnitt (602)
und der zweite gekrümmte Abschnitt (603) des Nockens (601) sequenziell auf die Zufuhrverknüpfung
(61) wirken; und die Klemmvorrichtungen (45) dazu gebracht werden, sich vom offenen
Zustand in den geschlossenen Zustand zu ändern, wenn der zweite gekrümmte Abschnitt
(603) und der erste gekrümmte Abschnitt (602) des Nockens (601) sequenziell auf die
Zufuhrverknüpfung (61) wirken.
3. Rotationsdruckmaschine (2) nach Anspruch 1, wobei die Zufuhrsteuereinheit (62) eine
erste Antriebseinheit (621) und eine erste Steuervorrichtung (622) einschließt; wobei
sich die erste Antriebeseinheit (621) in einem zurückgezogenen Zustand befindet und
die erste Steuervorrichtung (622) elektrisch mit der ersten Antriebseinheit (621)
verbunden ist, um die erste Antriebseinheit (621) zu steuern, um vom zurückgezogenen
Zustand in einen ausgezogenen Zustand zu wechseln; und wobei die Entladesteuereinheit
(72) eine zweite Antriebseinheit (721) und eine zweite Steuervorrichtung (722) einschließt;
wobei sich die zweite Antriebseinheit (721) in einen erweiterten Zustand befindet
und die zweite Steuervorrichtung (722) elektrisch mit der zweiten Antriebseinheit
(721) verbunden ist, um die zweite Antriebseinheit (721) zu steuern, um vom erweiterten
Zustand in den zurückgezogenen Zustand zu wechseln.
4. Rotationsdruckmaschine (2) nach Anspruch 1, wobei eine Klemmfläche, die von den Klemmvorrichtungen
(45) gebildet ist, mit dem Druckzylinder (4) überlappt, um einen Klemmeffekt bereitzustellen,
wenn sich die Klemmvorrichtungen (45) im geschlossenen Zustand befinden; und ein Winkel
zwischen der Klemmfläche der Klemmvorrichtungen (45) und der Fläche des Druckzylinders
(4) gebildet wird, um einen Freigabeeffekt bereitzustellen, wenn sich die Klemmvorrichtungen
(45) im geöffneten Zustand befinden.
5. Rotationsdruckmaschine (2) nach Anspruch 1, wobei jede der Klemmvorrichtungen (45)
einen Klemmabschnitt (451) und einen Schiebeabschnitt (452) einschließt, von denen
beide fest auf der Rotationswelle (43) montiert sind; wobei der Schiebeabschnitt (452)
mit dem Druckzylinder (4) überlappt, wenn auf die Rotationswelle (43) durch die Zufuhrsteuereinheit
(62) gewirkt wird; und ein Winkel zwischen dem Schiebeabschnitt (452) und der Fläche
des Druckzylinders (4) gebildet wird, wenn auf die Rotationswelle (43) durch die Entladesteuereinheit
(72) gewirkt wird.
6. Rotationsdruckmaschine (2) nach Anspruch 1, wobei die Zufuhrverknüpfung (61) einen
ersten Link (611) und einen zweiten Link (612) einschließt; wobei der erste und der
zweite Link (612) an ihren benachbarten Enden fest miteinander verbunden sind, die
zusammen ein Schwenkzentrum bilden; wobei die Antriebsquelle (60) und die Zufuhrsteuereinheit
(62) im Betrieb auf dem ersten Link (611) montiert sind, und wobei ein anderes gegenüberliegendes
Ende des zweiten Links (612) beweglich ist, um das Schwenkelement (46) zu berühren,
um die Rotationswelle (43) zu drehen.
7. Rotationsdruckmaschine (2) nach Anspruch 6, wobei der zweite Link (612) einen Schwenkverbindungskörper
(614), einen Schiebekopf (615), der mit einer Seite eines distalen Endes des Schwenkverbindungskörpers
(614) verbunden ist, um zu verursachen, dass das Schwenkelement (46) schwenkt, und
einen Längeneinstellungsmechanismus (616), der sich zwischen dem Schwenkverbindungskörper
(614) und dem Schiebekopf (615) befindet, einschließt.
8. Rotationsdruckmaschine (2) nach Anspruch 7, wobei der Längeneinstellungsmechanismus
(616) eine erste Begrenzungsschiene (617) und ein erstes Verriegelungselement (618)
einschließt; wobei die erste Begrenzungsschiene (617) auf einem des Schwenkverbindungskörpers
(614) und des Schiebekopfs (615) gebildet ist, während das erste Verriegelungselement
(618) auf dem anderen des Schwenkverbindungskörpers (614) und des Schiebekopfs (615)
montiert ist; und der Schiebekopf (615) entlang der ersten Begrenzungsschiene (617)
beweglich ist, um dadurch eine gesamte Länge des zweiten Links (612) zu ändern.
9. Rotationsdruckmaschine (2) nach Anspruch 1, wobei die Entladeeinheit (71) ein Ende
aufweist, das an den Druckzylinder (4) befestigt ist, um als Schwenkzentrum zu dienen,
und ein weiteres, gegenüberliegendes Ende, das mit der Entladesteuereinheit (72) verbunden
ist; wobei ein erhöhter Bereich (710) auf der Entladeeinheit (71) zwischen dem Schwenkzentrum
und der Entladesteuereinheit (72) gebildet ist, und wobei der erhöhte Bereich (710)
höher als andere Bereiche der Entladeeinheit (71) ist, die sich an zwei lateralen
Seiten des erhöhten Bereichs (710) befinden.
10. Rotationsdruckmaschine (2) nach Anspruch 9, wobei die Entladeeinheit (71) einen gekrümmten
Armabschnitt (711), einen erhöhten Abschnitt (712), der den erhöhten Bereich (710)
bildet, und einen Positionseinstellungsmechanismus (713) einschließt, der zwischen
dem gekrümmten Armabschnitt (711) und dem erhöhten Armabschnitt (712) gebildet ist.
11. Rotationsdruckmaschine (2) nach Anspruch 10, wobei der Positionseinstellungsmechanismus
eine zweite Begrenzungsschiene (714) und ein zweites Verrielgelungselement (715) umfasst;
wobei die zweite Begrenzungsschiene (714) auf einem des gekrümmten Armabschnitts (711)
und des erhöhten Armabschnitts (712) gebildet ist, während das zweite Verriegelungselement
(715) auf dem anderen des gekrümmten Armabschnitts (711) und des erhöhten Armabschnitts
(712) montiert ist; und wobei der erhöhte Armabschnitt (712) entlang der zweiten Begrenzungsschiene
(714) beweglich ist, wenn sich das zweite Verriegelungselement (715) in einem gelösten
Zustand befindet, wodurch eine Änderung einer Verbindungsposition des erhöhten Armabschnitts
(712) mit Bezug auf die gekrümmte Armposition (711) ermöglicht wird.
12. Rotationsdruckmaschine (2) nach Anspruch 1, weiter umfassend eine Trockungseinheit
(8), die über dem Entladesteuermechanismus (7) angeordnet ist, um Tinte auszuhärten,
die auf das Werkstück (3) gedruckt wurde, um ein Muster zu bilden.
13. Rotationsdruckmaschine (2) nach Anspruch 12, wobei die Trocknungseinheit (8) als eine
ultraviolette Lampe konfiguriert ist.
14. Rotationsdruckmaschine (2) nach Anspruch 1, wobei die Reset-Einheit (44) einen Befestigungssitz
(441) und ein elastisches Element (442) umfasst; wobei der Befestigungssitz (441)
fest auf der Rotationswelle (43) befestigt ist und das elastische Element (442) zwei
Enden aufweist, die getrennt gegen den Befestigungssitz (441) und eine Fläche des
Druckzylinders (4) drücken, so dass das elastische Element (442) immer gegen den Befestigungssitz
(441) schiebt.
1. Machine d'impression rotative (2), avec laquelle une pièce de travail (3) ne peut
être imprimée qu'une seule fois ou être imprimée par répétition plusieurs fois d'une
manière continue, comprenant :
un cylindre d'impression (4) comportant au moins une unité de serrage (42) ; l'unité
de serrage (42) comprenant chacune un arbre rotatif (43), sur lequel une pluralité
de dispositifs de serrage (45) sont disposés ; les dispositifs de serrage (45) étant
maintenus dans un état fermé et aptes à passer à un état ouvert lorsque l'arbre rotatif
(43) est tourné ;
une unité d'impression (5) située sur et adjacente à une surface d'impression (A)
du cylindre d'impression (4) pour réaliser une impression sur la pièce de travail
(3) en coopération avec le cylindre d'impression (4) ;
un mécanisme de commande d'alimentation (6) comprenant une source d'entraînement (60)
; et
un mécanisme de commande de déchargement (7) comprenant une unité de déchargement
(71),
la machine d'impression rotative (2) étant caractérisée par le fait que :
un élément oscillant (46) et une unité de réinitialisation (44) sont disposés sur
l'arbre rotatif (43) de chacune de l'au moins une unité de serrage (42) ;
le mécanisme de commande d'alimentation (6) comprend une liaison d'alimentation (61)
et une unité de commande d'alimentation (62) ; la source d'entraînement (60) amenant
la liaison d'alimentation (61) à passer entre une première position (90), dans laquelle
la liaison d'alimentation (61) peut toucher l'élément oscillant (46) lorsque le cylindre
d'impression (4) tourne, et une seconde position (91), dans laquelle la liaison d'alimentation
(61) ne peut pas toucher l'élément oscillant lorsque le cylindre d'impression (4)
tourne ; et l'unité de commande d'alimentation (62) séparant la liaison d'alimentation
(61) vis-à-vis de la source d'entraînement (60), de telle sorte que la liaison d'alimentation
(61) est maintenue dans la seconde position (91) ; et
le mécanisme de commande de déchargement (7) comprend une unité de commande de déchargement
(72) ; l'unité de déchargement (71) étant montée dans la première position (90), dans
laquelle l'unité de déchargement (71) peut toucher l'élément oscillant (46) lorsque
le cylindre d'impression (4) tourne ; et l'unité de commande de déchargement (72)
commutant l'unité de déchargement (71) de la première position (90) à la seconde position
(91), dans laquelle l'unité de déchargement (71) ne peut pas toucher l'élément oscillant
(46) lorsque le cylindre d'impression (4) tourne.
2. Machine d'impression rotative (2) selon la revendication 1, dans laquelle la source
d'entraînement (60) est configurée sous la forme d'une came (601) ; la came (601)
ayant une première partie incurvée (602) et une seconde partie incurvée (603) qui
ont des courbures différentes ; les dispositifs de serrage (45) étant amenés à passer
rapidement de l'état fermé à l'état ouvert lorsque la première partie incurvée (602)
et la seconde partie incurvée (603) de la came (601) agissent séquentiellement sur
la liaison d'alimentation (61) ; et les dispositifs de serrage (45) étant amenés à
passer de l'état ouvert à l'état fermé lorsque la seconde partie incurvée (603) et
la première partie incurvée (602) de la came (601) agissent séquentiellement sur la
liaison d'alimentation (61).
3. Machine d'impression rotative (2) selon la revendication 1, dans laquelle l'unité
de commande d'alimentation (62) comprend une première unité d'entraînement (621) et
un premier dispositif de commande (622) ; la première unité d'entraînement (621) étant
dans un état rétracté, et le premier dispositif de commande (622) étant relié électriquement
à la première unité d'entraînement (621) pour commander la première unité d'entraînement
(621) afin de la faire passer de l'état rétracté à un état étendu ; et l'unité de
commande de déchargement (72) comprenant une seconde unité d'entraînement (721) et
un second dispositif de commande (722) ; la seconde unité d'entraînement (721) étant
dans un état étendu, et le second dispositif de commande (722) étant relié électriquement
à la seconde unité d'entraînement (721) pour commander la seconde unité d'entraînement
(721) afin de la faire passer de l'état étendu à un état rétracté.
4. Machine d'impression rotative (2) selon la revendication 1, dans laquelle une surface
de serrage formée par les dispositifs de serrage (45) chevauche le cylindre d'impression
(4) pour fournir un effet de serrage lorsque les dispositifs de serrage (45) sont
dans l'état fermé ; et un angle est formé entre la surface de serrage des dispositifs
de serrage (45) et la surface du cylindre d'impression (4) pour fournir un effet de
libération lorsque les dispositifs de serrage (45) sont dans l'état ouvert.
5. Machine d'impression rotative (2) selon la revendication 1, dans laquelle chacun des
dispositifs de serrage (45) comprend une section de serrage (451) et une section de
poussée (452), toutes deux étant montées de manière fixe sur l'arbre rotatif (43)
; la section de poussée (452) chevauchant le cylindre d'impression (4) lorsque l'arbre
rotatif (43) est actionné par l'unité de commande d'alimentation (62) ; et un angle
étant formé entre la section de poussée (452) et la surface du cylindre d'impression
(4) lorsque l'arbre rotatif (43) est actionné par l'unité de commande de déchargement
(72).
6. Machine d'impression rotative (2) selon la revendication 1, dans laquelle la liaison
d'alimentation (61) comprend une première bielle (611) et une seconde bielle (612)
; les première et seconde bielles (612) étant reliées de manière fixe l'une à l'autre
à leurs extrémités adjacentes, qui forment ensemble un centre de pivot ; la source
d'entraînement (60) et l'unité de commande d'alimentation (62) étant montées de manière
fonctionnelle sur la première bielle (611), et une autre extrémité opposée de la seconde
bielle (612) étant déplaçable pour toucher l'élément oscillant (64) pour faire tourner
l'arbre rotatif (43).
7. Machine d'impression rotative (2) selon la revendication 6, dans laquelle la seconde
bielle (612) comprend un corps de bielle oscillant (614), une tête-poussoir (615)
reliée à un côté d'une extrémité distale du corps de bielle oscillant (614) pour amener
l'élément oscillant (46) à osciller, et un mécanisme de réglage de longueur (616)
situé entre le corps de bielle oscillant (614) et la tête-poussoir (615).
8. Machine d'impression rotative (2) selon la revendication 7, dans laquelle le mécanisme
de réglage de longueur (616) comprend un premier rail de limitation (617) et un premier
élément de verrouillage (618) ; le premier rail de limitation (617) étant formé sur
l'un parmi le corps de bielle oscillant (614) et la tête-poussoir (615) tandis que
le premier élément de verrouillage (618) est monté sur l'autre parmi le corps de bielle
oscillant (614) et la tête-poussoir (615) ; et la tête-poussoir (615) étant déplaçable
le long du premier rail de limitation (617) pour ainsi changer une longueur totale
de la seconde bielle (612).
9. Machine d'impression rotative (2) selon la revendication 1, dans laquelle l'unité
de déchargement (71) a une extrémité fixée au cylindre d'impression (4) pour servir
de centre de pivot et une autre extrémité opposée reliée à l'unité de commande de
déchargement (72) ; une zone surélevée (710) étant formée sur l'unité de déchargement
(71) entre le centre de pivot et l'unité de commande de déchargement (72), et la zone
surélevée (710) étant plus haute que d'autres zones de l'unité de déchargement (71)
situées sur deux côtés latéraux de la zone surélevée (710).
10. Machine d'impression rotative (2) selon la revendication 9, dans laquelle l'unité
de déchargement (71) comprend une partie de bras incurvée (711), une partie de bras
surélevée (712) qui forme la zone surélevée (710), et un mécanisme de réglage de position
(713) formé entre la partie de bras incurvée (711) et la partie de bras surélevée
(712).
11. Machine d'impression rotative (2) selon la revendication 10, dans laquelle le mécanisme
de réglage de position comprend un second rail de limitation (714) et un second élément
de verrouillage (715) ; le second rail de limitation (714) étant formé sur l'une parmi
la partie de bras incurvée (711) et la partie de bras surélevée (712) tandis que le
second élément de verrouillage (715) est monté sur l'autre parmi la partie de bras
incurvée (711) et la partie de bras surélevée (712) ; et la partie de bras surélevée
(712) étant déplaçable le long du second rail de limitation (714) lorsque le second
élément de verrouillage (715) est dans un état relâché, permettant un changement dans
une position de liaison de la partie de bras surélevée (712) par rapport à la partie
de bras incurvée (711).
12. Machine d'impression rotative (2) selon la revendication 1, comprenant en outre une
unité de séchage (8) disposée sur le mécanisme de commande de déchargement (7) pour
durcir de l'encre qui a été imprimée sur la pièce de travail (3) pour former un motif.
13. Machine d'impression rotative (2) selon la revendication 12, dans laquelle l'unité
de séchage (8) est configurée sous la forme d'une lampe à ultraviolets.
14. Machine d'impression rotative (2) selon la revendication 1, dans laquelle l'unité
de réinitialisation (44) comprend un siège de fixation (441) et un élément élastique
(442) ; le siège de fixation (441) étant monté de manière fixe sur l'arbre rotatif
(43), et l'élément élastique (442) ayant deux extrémités appuyant séparément contre
le siège de fixation (441) et une surface du cylindre d'impression (4), de telle sorte
que l'élément élastique (442) pousse toujours contre le siège de fixation (441).