JP2001199044A - Sheet-fed printing press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a separation / discharge of a booklet which can be easily assembled to a sheet-fed printing press without a booklet extraction mechanism, has a simple mechanism, and can separate and discharge a book safely and reliably. A sheet-fed printing press with means is obtained. SOLUTION: In a sheet-fed printing machine including a supply unit, a printing unit, a monitoring unit, a transporting unit, and an accumulating unit, the transporting unit includes a booklet separating unit, and among the prints inspected by the monitoring unit, Non-defective products are accumulated in the accumulation unit via the transport unit, and defective products are separated and discharged in the transport unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-fed printing press provided with a printing-sheet separating means for accurately and safely discharging a printing book such as a sample for printing defects and sampling inspection and a sample from the printing press.

[0002]

2. Description of the Related Art Conventionally, when a printing failure has occurred in a sheet-fed printing press, generally, a strip of colored paper called a guard paper is inserted between sheets of a print book stacking section to perform printing. After the end of the process, the defective papers are searched for by using the warning paper of the bundle of printed papers as a guide, and are manually extracted.

[0003] On the other hand, there is also a sheet-fed printing machine provided with a printing-sheet extracting mechanism for extracting sample paper, inspection paper, a defective printing book, or the like in the printing-book collecting section of the printing press.
There is also an example in which a print book is manually extracted by operating a print book extracting mechanism.

[0004]

By the way, in recent years, with the improvement of the performance of the print quality monitoring apparatus, an example of inspecting the print quality on a high-end offset printing machine has been increasing. Therefore, attempts have been made to improve the efficiency of the sampling operation by marking the poor quality paper or inserting a warning paper based on the inspection result.

[0005] However, the print book extracting mechanism of the print book stacking section incorporates a complicated movable mechanism in a narrow space, and the work of extracting the print book is not safe and reliable. Many sheet-fed printing presses are not provided, and the work of extracting defective prints from a print book bundle is a heavy burden.

Accordingly, the present invention provides a sheet-fed printing press which can be easily assembled to a sheet-fed printing press without a book-drawing mechanism, has a simple mechanism, and can separate and discharge a printed book safely and accurately. It is an object of the present invention to provide a book separation and discharge device for use in printing.

[0007]

According to the present invention, there is provided a sheet-fed printing press comprising:
Consisting of a supply unit, a printing unit, a monitoring unit, a transport unit, and a stacking unit, the transport unit is equipped with a booklet separation unit, and among the prints inspected by the monitoring unit, good products are collected via the transport unit. The defective products are separated and discharged in the transport unit.

The transport unit includes a book transport unit by chain delivery, and a grip release unit for releasing the gripper of the chain deliver, and the grip release is performed based on the quality information of the book inspected by the monitoring unit. When the means is controlled and a defective product is detected, the gripper is opened to separate the printed book from the transport path and discharge it to the outside of the machine.

[0009]

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram illustrating an embodiment of the sheet-fed printing press. FIG.
FIG. 3 is a configuration diagram showing a separation and discharge unit of a sheet-fed printing book. FIG. 3 is a block diagram showing a control system of the separation / discharge unit.

(Configuration of Printing Press) First, the overall configuration of a sheet-fed printing press according to the present invention will be described. In FIG. 1, 1 is a sheet-fed printing press, 2 is a sheet feeding section, 3 is a sheet feeding section, and 4a
4d is a printing section, 8 is a print book transport section, and 9 is a print book accumulation section.

The sheet-fed printing press 1 has printing units 4a to 4d.
Each of the printing sections is provided with an ink adjusting section, a dampening solution adjusting section, and a printing monitoring section (not shown). The printing control unit 5 controls the ink and dampening solution adjusting units based on the image signals obtained by the printing monitoring units. An operation console 6 for adjusting the operation is connected to the print control unit 5.

On the other hand, the print control unit 5 determines the quality of the image printed on the sheet based on the image signal obtained from the print monitoring unit, and discharges the printed sheet to determine the quality. The paper control unit 7 is connected. The paper discharge control unit 7 controls a not-shown book-sheet separating mechanism provided in the book-sheet transporting unit 8, and stores the sheet in the book-sheet stacking unit 9 for non-defective products or the separated book-book receiver 20 for defective products. Separate and accumulate print books.

(Print Book Discharge Unit) Next, the details of the print book discharge unit in the sheet-fed printing press of the present invention will be described. In FIG. 2, reference numeral 8 denotes a print book transport unit, 9 denotes a print book stacking unit, and 20 denotes a separate print book receiver. The book transport section 8 is provided at the rear end of the printing section 4 and includes a chain delivery 1 having a plurality of grippers 19.
8, the sheet printing book 10 passed from the printing unit 4 is
It is conveyed toward the print book stacking section 9 or the separated print book receiver 20.

The chain delivery 18 wraps around between the rear end of the printing unit 4 and the upper rear end of the printing book stacking unit 9, and a sheet-fed book is sent to the chain delivery 18. The sheet is conveyed while being sandwiched by grippers 19 provided at predetermined intervals.

The chain delivery 18 provided in the book transport unit 8 normally transports a book from a lower position at the rear end of the printing unit 4 to a higher position above the print stacking unit 9. Therefore, an empty space is provided on the upstream side (printing section side) of the print book transport section 8, that is, below the skewing section of the chain delivery 18. Therefore, in the sheet-fed printing press of the present invention, utilizing the empty space below the skewed portion,
Provide a mechanism for separating and discharging defective prints.

For example, as shown in FIG. 2, a gripper opening cam 14 and a cam drive source 15 for driving the gripper opening cam 14 are newly added along the skewed portion of the chain delivery 18 and the skew is increased. A transport stopper 16 and a stopper driving source 17 for rotating the transport stopper 16 are added near the end of the row. Further, a separated book receiver 20 for stacking the separated discharged books is provided below the skewing portion of the chain delivery 18.

In the illustrated example, the gripper release cam 14 is supported on a rotation shaft, and is rotatable by a cam drive source 15 between a standby position and a gripper release position. The cam drive source 15 uses a pneumatic actuator, for example, an air cylinder. The transport stopper 16 is also supported by a rotating shaft, and is rotatable by a stopper driving source 17 between a standby position and a print book locking position. The stopper drive source 17 uses a pneumatic actuator, for example, an air cylinder.

The separated printing book receiver 20 is used to accumulate printing books separated from the traveling path of the printing book transport unit 8, and has a metal plate bent in an L-shaped cross section or has an antistatic function. It is made of a plastic plate, and is installed in an empty space below the oblique portion so that the bottom portion is substantially parallel to the oblique portion of the chain delivery 18. It is desirable that the separation printing book receiver 20 be installed via a slide rail or the like so that it can be pulled out of the printing press.

In FIG. 2, reference numeral 14a denotes a gripper opening cam for stacking the booklets sandwiched and conveyed by the grippers 19 in the booklet accumulating section 9, and the gripper 19 serves as a booklet conveying section. 8, the gripper 19 is forcibly released. Also, 9a
Is a transport stopper that locks the sheet-fed printing paper released from the gripper 19 at a fixed position on the printing paper stacking unit 9.
b is a stopper drive source for driving the transport stopper 9a.

On the other hand, reference numeral 14b denotes a gripper opening cam for the gripper 19 to grip a print book transferred directly from the plate cylinder of the printing unit 4 or via the transfer cylinder. When passing through the position, the gripper 19 is forcibly opened, and when the book is added, the gripper 19 is closed to act to convey the book along the chain delivery 18.

(Printed Book Separation Control Device)
A control system for controlling the operations of the gripper opening cam 14 and the transport stopper 16 provided in the printer will be described. 3, reference numeral 15 denotes a cam drive source for driving the gripper opening cam 14, and reference numeral 16 denotes a stopper drive source for driving the transport stopper 16.

In the print book transport section 8 shown in FIG. 2, the gripper opening cam 14 and the transport stopper 16 are driven to separate and discharge defective prints and sample paper from the transport path. The printing press includes imaging cameras 11a and 11b for capturing a print image of a printing book as an electric signal.
Further, a plurality of transport sensors 12a, 12b, 12c for detecting the transport position of the printed book are provided.

The image signals from the imaging cameras 11a and 11b are input to the quality monitoring device 11, where the quality of the printed book is judged. Further, the transport sensors 12a, 12b, 1
The printing book detection signal by 2c is input to the conveyance monitoring device 12, and the conveyance positions of individual printing papers sequentially conveyed in the printing press are monitored. A pass / fail determination signal from the quality monitoring device 11 and a print position signal from the transport monitoring device 12 are input to a separation control device 13, which separates each of the prints being transported through the printing press into a printing copy. It controls whether or not to be separated by the transport unit 8.

Here, as the quality monitoring device 11, for example, a high-speed image processing device is used. Further, as the transport monitoring device 12, for example, a logic control device having a built-in printing position storage unit using a shift register is used. Further, as the separation control device 13, for example, a programmable sequence controller is used.

Although not shown, an arithmetic and control unit,
For example, a personal computer, a workstation, or the like may be separately provided, and the quality monitoring device 11, the transport monitoring device 12, the separation control device 13, and the like may be integrated and operated and controlled.

Here, reference numerals 13a and 13b denote electromagnetic solenoid valves, each of which comprises an air cylinder which opens and closes by applying an output electric signal of the separation control device 13 to the electromagnetic solenoid valves 13a and 13b. The direction of air supply to the cam drive source 15 and the stopper drive source 17 is reversed, and the removal of the drive shaft is controlled.

As the imaging cameras 11a and 11b, various photoelectric type area sensors and line sensors can be used. Further, as the transport sensors 12a and 12b, a photoelectric reflection sensor or a transmission sensor can be used. Furthermore, as the transport sensor 12c, a photoelectric or magneto-electric rotary encoder can be used. As the rotary encoder, a rotary encoder provided in advance on a sheet transport drive shaft of a sheet-fed printing press can be used.

Next, the operation of the printing press will be described. In the steady state of the printing press, as shown in FIG. 1, a printing monitoring unit is provided in each of the printing units 4a to 4d, and based on an image signal obtained by each printing monitoring unit. Automatic adjustment of ink and dampening water.

On the other hand, the image signal of the image printed on the sheet is judged to be good or bad by the print control unit 5. Part 8
Is driven to separate and accumulate sheet-fed prints in the separated print receiver 20 for defective products.

The operation of each unit in this case will be described. As shown in FIG. 3, the print image of the print book is photoelectrically converted by the imaging cameras 11 a and 11 b and input to the quality monitoring device 11. In the quality monitoring device 11,
The reference image, which is set and registered in advance, is compared with the print image of the printed book, and it is determined whether or not the color tone difference or the tone difference is within an allowable range.

On the other hand, in the transport monitoring device 12, the transport sensor 12a detects a printing target of the determination process and stores the detection signal in a printing location storage unit (not shown). Then, the quality judgment result by the quality monitoring device 11 is transmitted to the transport monitoring device 12.
Is input, the pass / fail status of the book is stored.

The transport monitoring device 12 stores the quality judgment result of each printing paper being transported from the position where the imaging camera is provided to the end position of the printing paper transporting unit. It is electrically shifted based on the signal of the transport sensor 12c synchronized with the transport of the book.

On the other hand, the transport sensor 12b is
Is provided on the upstream side of the separation / discharge mechanism, and detects that the printed book has been transported to the position where the separation / discharge mechanism is disposed. When a print book is detected by the transfer sensor 12b, quality information of the print book is input from the transfer monitoring device 12 to the separation control device 13, and the separation control device 13 starts operating.

Based on the quality information input from the transport monitoring device 12, the separation control device 13
And the stopper drive source 17 is driven. If the quality information input to the separation control device 13 is “bad”, the separation control device 13
The cam drive source 15 is driven via 3a, and the stopper drive source 17 is driven via an electromagnetic solenoid valve 13b.

At this time, the operation of the cam drive source 15 and the stopper drive source 17 causes the gripper opening cam 1 to move.
As shown in FIG. 4, the transport stopper 4 and the transport stopper 16 are rotated to the print book separating position. First, the gripper opening cam 14 acts on the gripper 19 to release the defective print book 10b.

Although the defective book 10b advances due to inertia, it contacts the transport stopper 16 and stops transport. The gripper 19 proceeds as it is in an opened state, and the defective print 10b is released from the gripper. Thereafter, the defective book 10b falls onto the separated book receiver 20 by gravity.

Next, the separation control device 13 acts on the electromagnetic solenoid valves 13a and 13b,
Then, the stopper drive source 17 is driven to return the gripper opening cam 14 and the transport stopper 16 to the standby position shown in FIG.

When the quality information of the book is "non-defective", the separation control device 13 does not operate the cam drive source 15 and the stopper drive source 17, so that the print book is
The chain delivery 18 conveys the print book stacking section 9 and the gripper 19 is opened by the gripper opening cam 14a.

(Other Embodiments) In this embodiment, an air cylinder is used to drive the gripper opening cam and the transport stopper. However, an actuator of another form such as a servomotor or an electromagnetic solenoid may be used. Alternatively, an air nozzle may be provided near the book separation position, and air may be blown onto the separated book to ensure that the book is separated from the transport path.

Further, in the present embodiment, the books separated in the book transport section are configured to be stacked on the separated book receiver, but the belt conveyor, preferably a belt conveyor provided with a suction mechanism, is used for the printing. It may be provided at the dropping position, so that the printed book separated and dropped from the printed book transport unit is discharged out of the printing press.

Further, in the present embodiment, in order to monitor the transport of the print book, the transport position of the print book is directly detected by using the photoelectric sensor, but the printing machine is mechanically driven. Electromagnetically detectable detection on a rotation axis, for example, a drive axis of an impression cylinder that rotates while holding a sheet in a printing unit, or a drive axis of a chain delivery that is driven in synchronization with the impression cylinder A configuration may also be adopted in which the transport of a printed book is indirectly monitored by mounting a piece and detecting the detected piece with an electromagnetic sensor. Further, the operation position of each part of the printing press may be detected by using the photoelectric sensor, and the conveyance of the printed book may be monitored.

Further, in the present embodiment, the control unit of the printing book separation mechanism is constituted by a plurality of devices such as a quality monitoring device, a conveyance monitoring device, and a separation control device. It may be integrated in a device.

In the present embodiment, an example of separating and discharging defective printing books has been described. However, a counter is provided in the separation control device, and a function of separating and discharging printing paper sheets for every fixed number of sheets is added. Is also good. Alternatively, a push button switch may be added to the separation control device so that an operator of the printing press can press the switch to separate and discharge an arbitrary book.

As described above, in the sheet-fed printing press of the present invention, without changing the basic mechanism of the printing press main body.
Since the booklet separating mechanism is provided by utilizing the skewed empty space of the booklet transporting section, it is particularly suitable for adding a booklet separating function to an existing sheet-fed printing press.

[0045]

As described above in detail, the sheet-fed printing press according to the present invention has a sheet-fed printing apparatus including a supply section, a printing section, a monitoring section, a transport section, and an accumulation section. A printing machine, in which a transport unit is provided with a print book separating unit, and among the print books inspected by the monitoring unit, non-defective products are accumulated in the accumulation unit via the transport unit,
Defective products are separated and discharged in the transport unit, so in a sheet-fed printing machine, sheet-fed printing books such as printing defects can be separated safely and reliably outside the machine without any modification to the existing transport unit mechanism. .

According to a second aspect of the present invention, in the sheet-fed printing press of the present invention, in addition to the first aspect of the present invention, the transporting unit includes a book transporting unit by chain delivery, and the chain delivery. Grip opening means for releasing the gripper of Veri, the grip opening means is controlled based on the quality information of the printed book inspected by the monitoring unit, and when a defective product is detected, the gripper is opened and the printing is performed. Since the book is discharged from the transport section, the sheet-fed book can be separated and discharged outside the machine with a simple configuration.

Further, the sheet-fed printing press according to the present invention is characterized in that:
As described above, in addition to the invention according to claim 2, since there is provided a conveyance stopping means which operates in cooperation with the grip releasing means and stops the conveyance of the released sheet-fed book, the sheet to be discharged is provided. The book can be reliably separated from the book transport section.

According to a fourth aspect of the present invention, there is provided a sheet-fed printing press according to the fourth aspect of the present invention, wherein the sheet-fed printing press separated and discharged from the transport unit is stacked. Since the stacking means is provided, the separated and discharged sheet printing can be easily and reliably stacked.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating an embodiment of a sheet-fed printing press.

FIG. 2 is a configuration diagram illustrating a separation and discharge mechanism of a sheet-fed printing book.

FIG. 3 is a block diagram showing a control system of a separation and discharge mechanism.

FIG. 4 is a configuration diagram showing the operation of the separation and discharge mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet-fed printing press 2 Sheet-fed paper supply part 3 Feeding part 4, 4a, 4b, 4c, 4d Printing part 5 Printing control part 6 Operation console 7 Discharge control part 8 Printed book transfer part 9 Printed book stacking part 9a Transfer Stopper 9b Stopper drive source 10 Sheet printing 10a Non-defective printing 10b Defective printing 11 Quality monitoring device 11a, 11b Imaging camera 12 Transport monitoring device 12a, 12b, 12c Transport sensor 13 Separation control device 13a, 13b Electromagnetic solenoid valve 14, 14a, 14b, gripper release cam 15 cam drive source 16 transport stopper 17 stopper drive source 18 chain delivery 19 gripper 20 separate printing book receiver

Claims (4)

[Claims] 1. A sheet-fed printing machine including a supply unit, a printing unit, a monitoring unit, a transporting unit, and a stacking unit. Is a sheet-fed printing machine, wherein the sheet is accumulated in an accumulation section via a conveyance section, and defective products are separated and discharged in the conveyance section. 2. The printing apparatus according to claim 1, wherein the transporting unit includes a book transporting unit using a chain delivery, and a grip opening unit that releases a gripper of the chain delivery. 2. The sheet-fed printing press according to claim 1, wherein the grip opening unit is controlled to release the gripper when a defective product is detected, thereby separating the print book from the transport unit. 3. The sheet-fed printing press according to claim 2, further comprising a conveyance stopping unit that interlocks with the grip opening unit and stops conveyance of the separated book. 4. The printing apparatus according to claim 1, further comprising a separation-printing-book stacking unit for stacking the printing-sheets separated and discharged in the transport unit.
2. The sheet-fed printing press according to 1.