JP3727511B2 - Printing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing apparatus, and more particularly to a printing apparatus having a function of stopping a cylinder at a predetermined position.
[0002]
[Prior art]
There are various cases in which it is necessary to stop the cylinder constituting the printing apparatus at a fixed position. For example, when the coater docking is performed between the varnish cylinder and the varnish impression cylinder constituting the printing apparatus (the varnish cylinder and the varnish impression cylinder are separated and then brought into contact with each other), the varnish of the triple cylinder is used. It is necessary to stop the impression cylinder at a predetermined docking position. Further, in a printing apparatus capable of single-sided printing and double-sided printing, when switching between single-sided printing and double-sided printing, it is necessary to stop the storage cylinder and the reverse cylinder constituting the printing apparatus at predetermined positions. At this time, if the storage cylinder is a triple cylinder and the reversing cylinder is a double cylinder, they are in a predetermined position while the single cylinder rotates 6 times (the least common multiple of 2 and 3). There is only one time.
[0003]
Conventionally, in the case as described above, in order to stop the cylinder constituting the printing apparatus at a fixed position, the cylinder is rotated from the position where the cylinder is temporarily stopped, and when the cylinder is rotated to the fixed position, it is attached to a predetermined position of the cylinder. It was detected by one sensor and stopped.
[0004]
[Problems to be solved by the invention]
However, when the cylinder to be stopped at the fixed position is, for example, an N-times cylinder connected to the single cylinder, it is necessary to rotate the single cylinder by a little less than N rotations from the position where it was temporarily stopped (initial position). In addition, since the initial position is unknown, it is necessary to always rotate at a low speed from the viewpoint of positioning accuracy. Therefore, it takes a long time to rotate the cylinder from the initial position to the target fixed position, and there is a problem that the working efficiency is poor.
[0005]
The present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide a printing apparatus that can quickly rotate a cylinder from an initial stop position to a predetermined stop position to improve work efficiency. And
[0006]
[Means for Solving the Problems]
In order to solve such a problem, the present invention includes a single cylinder and an N-fold cylinder that rotates once every N rotations in conjunction with the single cylinder, and after these cylinders are temporarily stopped In the printing apparatus that rotates from the first stop position until the N-fold cylinder is positioned at a target predetermined stop position and stops, a first signal is generated at a predetermined rotation angle when the single cylinder rotates once. Based on a detector, a second detector that generates a signal at a predetermined rotation angle when the N-fold cylinder rotates once, a signal from the first detector, and a signal from the second detector, the N-segmented cylinder initial stop position of the torso and an arithmetic memory unit that determines store or located in any region of the regions divided by N to N double-diameter cylinder in the rotational direction, stored in the operation storage unit Based on the area at the first stop position of the There is provided a printing apparatus characterized by controlling the rotation speed of the cylinder to the position.
[0007]
According to such an invention, a signal is generated from the first detector every rotation of the single cylinder, and a signal is generated from the second detector every rotation of the N-fold cylinder. It is possible to determine in which of the areas where the first stop position of the cylinder is divided into N in the rotation direction. Since the calculation storage unit determines and stores the stop position of the N-fold cylinder, it can determine how much the N-fold cylinder is rotated from the first stop position to reach the predetermined stop position. . Therefore, when the N-fold cylinder is rotated from the first stop position to the target predetermined stop position, the driving time is shortened while maintaining the stop accuracy based on the region at the first stop position of the N-fold cylinder. It becomes possible to perform motor speed control.
In the speed control, when the cylinder is rotated from the first stop position until the N-times cylinder is located at a target predetermined stop position, the cylinder rotation speed is reduced to a low speed at the transition of the N-fold cylinder region. Can be controlled.
[0008]
In addition, an M-fold cylinder that rotates once every time the single cylinder rotates M in conjunction with the single cylinder, and when the N-fold cylinder and the M-fold cylinder are stopped at a predetermined stop position, A third detector for generating a signal at a predetermined rotation angle when the double cylinder makes one rotation, and the arithmetic storage unit includes the signal from the first detector, the signal from the second detector, and the third detector. Based on the signal of the detector, it may be configured to determine and store in which region the first stop positions of the N-fold cylinder and the M-fold cylinder are respectively located .
In the speed control, when the cylinder is rotated from the first stop position to the target stop position until the N-fold cylinder and the M-fold cylinder are positioned, the rotation speed of the cylinder is changed at the timing when the region of the N-fold cylinder transitions. Control of decelerating to low speed can be performed .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic configuration diagram partially showing the printing apparatus according to the first embodiment of the present invention. As shown in FIG. 1, a printing apparatus 1 according to the present embodiment includes a paper feed cylinder 11 that is a single cylinder, a varnish impression cylinder 12 that is a triple cylinder connected to the paper feed cylinder 11 with a gear, The first detector 13, the second detector 14, and the calculation storage unit 15 are provided. In FIG. 1, for convenience, the feed cylinder 11 and the impression cylinder 12 are in contact with each other, but a predetermined gear train is actually interposed between the feed cylinder 11 and the impression cylinder 12. However, both are linked. Here, when coater-docking the varnish cylinder (not shown) and the varnish impression cylinder 12, it is necessary to stop the varnish impression cylinder 12 at a predetermined docking position.
[0010]
A detection plate 111 is mounted on the same axis (not shown) of the paper feed cylinder 11 so as to protrude in the radial direction of the paper feed cylinder 11, and a first detector 13 is installed in the vicinity of the rotation path of the detection plate 111. A signal is generated when the detection plate 111 comes close to the first detector 13 as the paper feed cylinder 11 rotates. Therefore, when the sheet feeding cylinder 11 rotates once, a signal is generated from the first detector 13 at a predetermined rotation angle. Similarly, a detection plate 121 is attached to the same axis (not shown) of the impression cylinder 12 so as to protrude in the radial direction of the impression cylinder 12, and the second detector 14 is installed on the rotation path of the detection plate 121. When the detection plate 121 comes close to the second detector 14 as the impression cylinder 12 rotates, a signal is generated. Here, in FIG. 1, for convenience, the sheet feeding cylinder 11, the varnish impression cylinder 12, and the detection plates 111 and 121 are illustrated in a transparent manner. Therefore, when the impression cylinder 12 makes one rotation, a signal is generated from the second detector 14 at a predetermined rotation angle. As the first detector 13 and the second detector 14, various well-known sensors such as electrical, magnetic, or optical that can generate a signal when the detection plates 111 and 121 are close to each other are used. Is possible. Further, the first detector 13 can share a detector attached coaxially to the paper feed cylinder 11 in order to detect the paper feed timing of the printing paper. In addition, detection that can detect the rotation of any single cylinder geared to the impression cylinder 12 of the varnish originally provided in the printing apparatus to detect the timing of various operations such as arrival of paper, passage and cylinder loading. Any container can be used.
[0011]
FIG. 2 shows an example of a time chart of signals generated from the first detector 13 and the second detector 14. 2A shows the output signal of the first detector 13, and FIG. 2B shows the output signal of the second detector 14, respectively. In this embodiment, since the impression cylinder 12 is a triple cylinder with respect to the sheet feeding cylinder 11 which is a single cylinder, the output signal period (t2) of the second detector 14 is the output of the first detector 13. It is three times the signal period (t1). Based on the generation status of these two signals and the mounting position of the detection plate 121, the second detector 14 is appropriately divided into three regions (indicated by A, B, and C in the drawing) in the rotation direction of the impression cylinder 12. It is possible to determine whether it is located. For example, the output signal of the second detector 14 is turned on (indicated by (1) in the figure), and the output signal of the first detector 13 is turned on (indicated by (2) in the figure) for the first time thereafter. In some cases, the second detector 14 determines that it is located at the boundary between the B region and the C region with respect to the impression cylinder 12. In this case, similarly, when the output signal of the first detector 13 is turned on twice (indicated by (3) in the figure), it is located at the boundary between the C region and the A region and turned on three times. When this occurs (indicated by (4) in the figure), it can be determined that it is located at the boundary between the A area and the B area.
[0012]
The arithmetic storage unit 15 shown in FIG. 1 receives the output signal of the first detector 13 and the output signal of the second detector 14, and determines the current position of the impression cylinder 12 based on such signals as described above. It is configured to memorize. Note that the arithmetic storage unit 15 may be configured by known electronic components such as a counter, a CPU, and a memory. In this way, since the calculation storage unit 15 determines and stores the position of the impression cylinder 12, it is determined how much the impression cylinder 12 is rotated from the initial stop position to reach the predetermined stop position. can do. Therefore, when rotating the impression cylinder 12 from the initial stop position to the target predetermined stop position, based on the stored contents of the arithmetic storage unit 15, the drive motor ( It is possible to perform speed control (not shown). For example, if the target predetermined stop position is in the middle of the B area and the first stop position is in the range from the middle of the B area to the C area, in the initial stage, about 3000 rotations per hour (feed cylinder) 11 rotation speed), and decelerates to about 300 rotations per hour (rotation speed of the paper feed cylinder 11) at the timing of transition from the C area to the A area (corresponding to (3) in FIG. 2). It seems that the speed is reduced to a low speed of about 60 revolutions per hour (the rotational speed of the paper feed cylinder 11) at the timing of transition from region B to region B (corresponding to (4) in FIG. 2). Thereafter, when the output signal of the second detector 14 is turned on, it may be completely stopped.
[0013]
The speed control method may be determined according to the first stop position stored in the calculation storage unit 15. For example, when the first stop position is in the A region, about 300 revolutions per hour (feeding) It can be controlled to rotate at a rotation speed of the paper cylinder 11 and decelerate to about 60 rotations per hour (the rotation speed of the paper feed cylinder 11) at the timing of transition from the A area to the B area. If the first stop position is between the boundary between the A area and the B area and the middle of the B area, it can be rotated from the initial stage at about 60 rotations per hour (the rotation speed of the paper feed cylinder 11). Good. Note that the rotational speed at each timing is not limited to the above-described values, and can be various values. Furthermore, by setting a timer and using the timer for speed control, it is possible to configure the motor to rotate at a high speed until it approaches a predetermined stop position. That is, in the initial stage, the rotation is performed at a high speed of about 3000 rotations per hour (the rotation speed of the paper feed cylinder 11), and about 300 rotations per hour (for the first time at the transition from the A area to the B area (corresponding to (4) in FIG. 2)). The speed is reduced to about 60 revolutions per hour (the rotational speed of the paper feed cylinder 11) after a few seconds and the timer is operated at this timing.
[0014]
Next, a printing apparatus according to the second embodiment of the present invention will be described. FIG. 3 is a schematic configuration diagram partially showing a printing apparatus according to the second embodiment of the present invention. As shown in FIG. 3, the printing apparatus 2 according to the present embodiment includes a paper feed cylinder 21 that is a single cylinder, a storage cylinder 22 that is a triple cylinder connected to the paper supply cylinder 21 with a gear, and a storage cylinder 22. Are provided with a reversing cylinder 23, a first detector 24, a second detector 25, a third detector 26, and an operation storage unit 27. Here, in FIG. 3, for convenience, the sheet feeding cylinder 21 and the reversing cylinder 23 are in contact with each other. However, in practice, there is a predetermined gap between the sheet feeding cylinder 21, the reversing cylinder 23, and the storage cylinder 22. A gear train is interposed, and each gear is interlocked. Here, the printing apparatus 2 of the present embodiment is a printing apparatus capable of single-sided printing and double-sided printing. When switching between single-sided printing and double-sided printing, the storage cylinder 22 and the reversing cylinder 23 are stopped at predetermined positions. It is necessary to let
[0015]
A detection plate 211 is mounted on the same axis (not shown) of the paper feed cylinder 21 so as to protrude in the radial direction of the paper feed cylinder 21, and a first detector 24 is installed in the vicinity of the rotation path of the detection plate 211. A signal is generated when the detection plate 211 comes close to the first detector 24 as the paper feed cylinder 21 rotates. Therefore, when the sheet feed cylinder 21 makes one rotation, a signal is generated from the first detector 24 at a predetermined rotation angle. Similarly, a detection plate 221 is mounted on the same axis as the storage cylinder 22 so as to protrude in the radial direction of the storage cylinder 22, and the second detector 25 is installed on the rotation path of the detection plate 221. A signal is generated when the detection plate 221 comes close to the second detector 25 as the body 22 rotates. Therefore, when the storage cylinder 22 makes one rotation, a signal is generated from the second detector 25 at a predetermined rotation angle. Further, a detection plate 231 is attached to the coaxial axis of the inversion cylinder 23 so as to protrude in the radial direction of the inversion cylinder 23, and a third detector 26 is installed on the rotation path of the detection plate 231. A signal is generated when the detection plate 231 approaches the third detector 26 along with the rotation. Here, in FIG. 3, for convenience, the sheet feeding cylinder 21, the storage cylinder 22, the reversing cylinder 23, and the detection plates 211, 221, and 231 are seen through and overlapped. Therefore, when the reversing cylinder 23 makes one rotation, a signal is generated from the third detector 26 at a predetermined rotation angle. Note that the second detector 25 and the third detector 26 are both installed so that the output signal is turned on when the storage cylinder 22 and the reversal cylinder 23 are at predetermined positions. As the first detector 24, the second detector 25, and the third detector 26, various well-known electric, magnetic, optical, and the like that can generate a signal when the detection plates 211, 221 and 231 come close to each other. This is the same as the first embodiment in that a sensor can be used.
[0016]
FIG. 4 shows an example of a time chart of signals generated from the first detector 24, the second detector 25, and the third detector 26. 2A shows the output signal of the first detector 24, FIG. 2B shows the output signal of the second detector 25, and FIG. 2C shows the output signal of the third detector 26, respectively. In the present embodiment, since the storage cylinder 22 is a triple cylinder with respect to the sheet supply cylinder 21 which is a single cylinder, the output signal period (t2) of the second detector 25 is the output of the first detector 24. It is three times the signal period (t1). Since the inversion cylinder 23 is a double cylinder, the output signal period (t3) of the third detector 26 is twice the output signal period (t1) of the first detector 24. Based on the generation status of these signals, the mounting position of the detection plate 221, and the like, the second detector 25 is appropriately divided into three regions (indicated by α, β, and γ in the drawing) in the rotational direction of the storage cylinder 22. It is possible to determine whether it is located. For example, the output signal of the second detector 25 is turned on (indicated by (1) in the figure), and the output signal of the first detector 24 is turned on (indicated by (3) in the figure) for the first time thereafter. When the second detector 25 determines that the storage cylinder 22 is located at the boundary between the β region and the γ region. Similarly, when the output signal of the first detector 24 is turned on twice (indicated by (4) in the figure), it is located at the boundary between the γ region and the α region, and is turned on three times ( It can be determined that (5) in the figure is located at the boundary between the α region and the β region. Further, when the output signal of the second detector 25 and the output signal of the third detector 26 are turned on simultaneously (indicated by (1) and (2), (6) and (7) in the figure). Can determine that the storage cylinder 22 and the reversing cylinder 23 are in a predetermined position, and can be determined not to be in a predetermined position if they are not turned on at the same time.
[0017]
3 receives the output signal of the first detector 24, the output signal of the second detector 25, and the third detector 26, and based on these signals, the storage cylinder 22 as described above. The current position is determined and stored. Note that the arithmetic storage unit 27 can be configured by known electronic components such as a counter, a CPU, and a memory. In this way, the calculation storage unit 27 determines and stores the position of the storage cylinder 22 (equivalent to storing the position of the reversing cylinder 23 interlocked with the storage cylinder 22), so It is possible to determine how much rotation from the stop position is reached to reach the predetermined stop position. Therefore, when rotating the storage cylinder 22 from the initial stop position to the target predetermined stop position, the drive motor (not shown) is designed so that the drive time is short and the stop accuracy is high based on the contents stored in the calculation storage unit 27. )) Can be controlled. For example, consider a case where the target predetermined stop position is in the middle of the β region, and the first stop position is a position slightly shifted from the predetermined stop position in the rotation direction (β region). In this case, when the β region, the γ region, the α region, the β region, and the γ region are sequentially rotated, the rotation is performed at a high speed of about 3000 rotations per hour (the rotation speed of the paper feed cylinder 21), and the rotation is started from the second γ region. At the timing of transition to the α region for the first time (corresponding to (8) in FIG. 4), the speed is reduced to about 300 revolutions per hour (the rotational speed of the paper feed cylinder 21), and the transition is made from the second α region to the third β region. It seems that the speed is reduced to a low speed of about 60 revolutions per hour (the rotational speed of the paper feed cylinder 21) at the timing (corresponding to (9) in FIG. 4). Thereafter, when the output signal of the second detector 25 is turned on (corresponding to (6) in FIG. 4), it may be completely stopped.
[0018]
The speed control method may be determined according to the initial stop position, the rotational speed is not limited to the above value, and can be set to various values, and a timer is used for speed control. Thus, it can be configured to rotate at a high speed until it comes closer to the predetermined stop position, as in the first embodiment.
[0019]
【The invention's effect】
As described above, according to the present invention, a signal is generated from the first detector every rotation of the single cylinder, and a signal is generated from the second detector every rotation of the N-fold cylinder. From the situation of occurrence, when these cylinders are once stopped, it is possible to determine in which of the N-divided areas the N- times cylinder is located in the rotation direction. Since the calculation storage unit determines and stores the position of the N-fold cylinder, it can determine how much the N-fold cylinder is rotated from the initial stop position to reach the predetermined stop position. Therefore, when the N-fold cylinder is rotated from the first stop position to the target stop position, the stop accuracy is maintained based on the area at the first stop position of the N-fold cylinder stored in the calculation storage unit. It becomes possible to control the speed of the drive motor so that the drive time is shortened.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram partially showing a printing apparatus according to a first embodiment of the present invention.
FIG. 2 shows an example of a time chart of signals generated from the first detector and the second detector shown in FIG.
FIG. 3 is a schematic configuration diagram partially showing a printing apparatus according to a second embodiment of the present invention.
4 shows an example of a time chart of signals generated from the first detector, the second detector, and the third detector shown in FIG. 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 2 Printing apparatus 11, 21 Feed cylinder 12 Varnish pressure cylinder 13, 24 First detector 14, 25 Second detector 26 Third detector 15, 27 Calculation storage part

Claims (4)

A single cylinder and an N-fold cylinder that rotates once every N rotations in conjunction with the single cylinder, and after stopping these cylinders once, a predetermined stop that is targeted from the first stop position In the printing apparatus that rotates and stops until the N-fold cylinder is located at a position , when the single cylinder rotates once, the first detector that generates a signal at a predetermined rotation angle and the N-fold cylinder rotate once. The first stop position of the N-fold cylinder rotates the N-fold cylinder based on a second detector that generates a signal at a predetermined rotation angle, and the signals of the first detector and the second detector. A calculation storage unit that determines and stores which of the N divided regions in the direction, and based on the region at the first stop position of the N-fold cylinder stored in the calculation storage unit, controlling the rotational speed of the cylinder from the stop position to the predetermined stop position to the target Printing apparatus according to claim. 2. The rotation speed of the cylinder is reduced to a low speed at a timing when the region of the N-fold cylinder transitions when the cylinder is rotated from the first stop position until the N-fold cylinder is located at a target predetermined stop position. Printing device. An M-fold cylinder that rotates once every M rotations in conjunction with the single cylinder; A third detector that generates a signal at a predetermined rotation angle when the M-fold cylinder rotates once, and after stopping these cylinders temporarily, a predetermined stop position targeted from the first stop position; In the printing apparatus that is rotated and stopped until the N-fold cylinder and the M-fold cylinder are positioned at the same time, the calculation storage unit includes the signal from the first detector, the signal from the second detector, and the signal from the third detector. The first stop position of the N-fold cylinder is located in an area obtained by dividing the N-fold cylinder into N in the rotation direction, and the first stop position of the M-fold cylinder in the rotation direction. It is determined and stored in which area of the M-divided area, and the first stop based on the respective areas at the first stop position of the N-fold cylinder and the M-fold cylinder stored in the calculation storage section The rotational speed of the cylinder from the position to the target stop position The printing apparatus according to claim 1 for controlling. When the cylinder is rotated from the first stop position until the N-fold cylinder and the M-fold cylinder are positioned at a predetermined target stop position, the rotation speed of the cylinder is reduced to a low speed at the timing when the region of the N-fold cylinder transitions. Item 4. The printing apparatus according to Item 3 .

Images