JPH025952Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is attached to a rotary printing press in order to inspect printed matter during the printing process, and consists of an inspection cylinder that wraps and conveys printing paper and an inspection mechanism that faces the circumference of the cylinder. It is related to the device.

In recent years, with the diversification of printing, there has been an increase in demand for printed materials that are printed with pictures and then added with sequence numbers, seals, store names, management codes, etc. The printing machine is connected to a special printing machine for numbers, etc., and printing is performed continuously, or after the design is printed, it is printed by an independent special printing machine and printed in a separate process.
Among these types of printed matter, each piece is important and expensive, such as bank notes, securities, and high-end art prints, and printing of images and additional printing of numbers etc. are done in separate processes. At the same time, an inspection process is set up before the reprinting process to check the quality of the image printing, and only those that pass the reprinting process are sent to the reprinting process to avoid management confusion and the occurrence of defective products. There is. In particular, since missing numbers are not allowed in items that are serially numbered, such as banknotes, strict inspections are carried out before reprinting. In the past, this inspection and sorting was carried out visually by a large number of workers using inspection equipment lined up in a large area, but in order to match the inspection speed to the high speed of printing machines, a large number of skilled workers were required to perform the inspection. However, many problems remained in terms of cost, etc.

Therefore, in recent years, with the development of electronics and optical equipment, misalignment, overlapping, color density, etc. of printed matter are detected electrically through an optical system, and the results are output as electrical signals in accordance with the high speed of the printing machine. Further, an inspection rotary printing press is being developed that incorporates this into a printing press so that inspection can be carried out during the reprinting process.

This inspection rotary printing machine is equipped with an inspection cylinder between a paper feeder and a printing unit for reprinting, and the printed paper (hereinafter referred to as paper) that has been printed with a pattern sent from the paper feeder is inspected. When the paper is conveyed while being wrapped around the circumferential surface of the cylinder, an inspection mechanism provided opposite to the circumferential surface inspects the paper and extracts fraudulent paper. In such an inspection device, if the paper rises from the circumference of the inspection cylinder, the inspection mechanism will malfunction and the inspection device will no longer function, so it is necessary to keep the paper in close contact with the circumference of the inspection cylinder. There is.

The present invention was developed in view of the above points, and consists of a plurality of air intakes extending in the axial direction of the cylinder and perforated from the cylinder circumferential surface, corresponding to the paper trailing edge of each printing paper wound around the test cylinder. An intake duct having holes and an intake device outside the device are connected by a pair of intake passages provided at the end of the body, and each of these intake passages is alternately opened by an on-off valve with one end fixed to the frame side, and
By providing a brush that is fixed to the frame side and has flocked brushes in sliding contact with the circumferential surface of the inspection cylinder on the upstream side of the inspection mechanism, the printed paper being inspected is brought into close contact with the circumferential surface of the inspection cylinder by the suction air and the brush. Inspection of an inspection rotary printing press that prevents malfunction of the inspection mechanism due to lifting of paper, and improves intake performance by blocking the intake path toward the paper being inspected and concentrating the intake air toward the intake hole being inspected. It provides equipment. Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

1 to 3 show an embodiment of the inspection device according to the present invention, FIG. 1 is a schematic side view of an inspection rotary printing press in which this is implemented, and FIG. 2 is a partially cutaway side view of the inspection device. , and FIG. 3 is a developed vertical sectional view showing the upper half and lower half of the inspection cylinder cut away at positions 90° out of phase in the circumferential direction. In the figure, printing press 1
It is composed of a paper feeder 2, an inspection device 3, a printing device 4, a paper ejection device 5, and other attached devices. This embodiment exemplifies a printing machine that additionally prints consecutive numbers on banknotes on which designs are printed, and the paper feed device 2 has a paper stack in which a large number of papers 6 on which a plurality of banknote designs are printed are stacked. A stand 7 is provided. This paper stacking table 7 is suspended from a paper feeding frame 8 by a chain 9, and a suction device (not shown) is installed above the paper stacking table 7.
The paper 6 is suctioned one by one from the upper layer and automatically rises as it is conveyed. Moreover, between the paper feeding device 2 and the inspection device 3,
A difference plate 10 that receives the paper 6 fed in the direction shown by arrow A from the paper feed device 2, and a swing 11 that feeds the paper 6 fed onto the difference plate 10 one by one to the inspection device 3 are provided. .

Next, in the inspection device 3, a pair of inspection cylinders 12 and 13, which will be described in detail later, are mounted between frames 14 on both sides with their peripheral surfaces facing each other, and each inspection cylinder 12,
13 is provided with inspection mechanisms 15 and 16, respectively, which face the paper 6 wrapped around its circumferential surface and conveyed, and which detect defective printing areas and issue signals. Reference numeral 17 denotes a paper take-up cylinder having a diameter of 1/2 of the inspection cylinder 13, which is in contact with this, and between this, a sprocket 18 on the same axis, and a sprocket 19 at the bottom of the printing device 4, there are the following: A pair of left and right conveyance chains 20 are stretched. A plurality of pawls 20b are arranged in parallel on a pawl shaft 20a supported at regular intervals between the left and right conveyor chains 20, and the paper 6 held by the pawls of the inspection cylinder 13 is moved between the paper pick-up cylinder 17 and the pawl shaft 20a. They work together to receive it, and as the conveyance chain 20 runs, it is transferred to the claw stand 20c.
It is configured to be held between the two and transported in the direction of arrow B.

Next, the printing device 4 includes a plate cylinder 21 equipped with a numbering machine on its circumferential surface, an impression cylinder 22 that faces the plate cylinder 21 and applies printing pressure during printing, and a paper transfer cylinder that faces the impression cylinder 22. The paper feed cylinder 24 is coaxial with the sprocket 19 and is in contact with the paper transfer cylinder 23.The paper feed cylinder 24 is provided with a paper feed cylinder 24 that is coaxial with the sprocket 19 and is in contact with the paper transfer cylinder 23. Chain 20 and paper transfer body 2
3 and between both cylinders 22 and 23, claws are provided to transfer the paper 6 in the directions indicated by arrows C, D, and E in the figure. The plate cylinder 21 can be attached to and detached from the impression cylinder 22 by being driven by a cam mechanism at the end of the shaft, and the inspection mechanisms 15 and 16 detect a defective paper and generate a signal to apply pressure when the defective paper passes. It is configured to separate from the barrel 22 and come into contact with each other after passing through. Further, the number device on the plate cylinder 21 is driven by a number feeding mechanism provided at the end of the shaft, and a number is sent every one rotation of the plate cylinder 21, and a number is sent by a defective paper detection signal from the inspection mechanisms 15 and 16. The number feeding is stopped only when the defective paper passes. Reference numeral 25 denotes an inking device that includes an ink fountain 26 and a large number of roller groups and supplies ink to the number machine.

Furthermore, a paper take-up cylinder 27 is in contact with the impression cylinder 22, and a pair of left and right paper ejection chains 30 are disposed between a sprocket 28 coaxially therewith and a sprocket 29 at the terminal end of the paper ejection device 5. A plurality of paper ejection claws are arranged in parallel on a claw shaft supported at regular intervals between the left and right paper ejection chains 30. 6 to paper collecting cylinder 2
7, and is configured to receive the sheet in cooperation with the sheet discharging chain 30 and convey it in the downward direction of the arrow. Reference numeral 31 denotes a paper stacking table which is provided to be able to rise and fall freely with respect to the paper ejection frame 32, and above which the paper 6 released from the paper ejection claw of the paper ejection chain 30 is stacked, and the paper 6 is stacked. It is configured so that it automatically descends. Furthermore, a paper ejection tray 33 is provided below the sprocket 29, and the paper ejection claw, which is normally open on the paper stacking table 31, is activated when a defective paper detection signal is issued from the inspection mechanisms 15 and 16. When the defective paper reaches the sprocket 29, the paper discharge claw opens and the defective paper is discharged to the paper discharge tray 3.

Next, the structure of the inspection cylinder 12 will be explained in detail with reference to FIGS. 2 to 4. The inspection cylinder 12, which rotates in the direction shown by arrow G in the figure, is connected to the left and right frames 14.
is supported via a bearing 34, and a drive gear 35 is pivotally attached to one end of the shaft. This inspection cylinder 12 is a so-called double cylinder having a diameter twice that of the plate cylinder 21, and has two pairs of gripping claw devices 36 and paper tail suction devices 37, which will be described later, arranged opposite to each other on the outer periphery. These two sets are symmetrical to each other, but since they have the same configuration, only one of them will be explained. That is, a triangular notch 38 is provided on the outer periphery of the inspection cylinder 12, and a cam follower 40 and a lever 41 are mounted on a pawl shaft 39 that is mounted in the notch 38 using a cam (not shown). A plurality of pawls 42 are arranged in parallel, and are opened and closed by reciprocating the pawl shaft 39 therebetween. 43 is notch 3
This is a nail stand attached to the outer end of the vertical wall of the paper 8, and is configured so that when the nail 42 is closed, the end of the paper 6 from the upstream side can be held between the nail stand and the nail 42.

An intake passage 44 that is connected to an intake port of an intake device (not shown) outside the apparatus via a rotary joint or the like is drilled through the end shaft of the inspection barrel 12 on the drive gear 35 side. On the other hand, on the circumference of the trunk, an intake duct 45 extending along almost the entire length of the trunk is located at a location corresponding to the tail of the paper 6 held in the claw 42 and extends in the axial direction of the trunk. There is. Since the inspection cylinder 12 is a double cylinder, and two sheets of paper 6 are wound around opposing positions on the circumference of the cylinder, the intake duct 45 is provided at a location that bisects the circumferential surface of the cylinder into two equal parts in the circumferential direction. Each intake duct 45 has a large number of intake holes 46 drilled from the trunk circumferential surface, and both intake ducts 4
5 and the intake passage 44 are connected by a pair of intake passages 47 extending in the radial direction from the end of the body.

Furthermore, a valve holder 48 is screwed onto the bearing 34 fixed to the frame 14 on one side.
An opening/closing valve 49 passing through the axis of the inspection barrel 12 is fixed to the valve holder 48 at one end with a nut 50 . This opening/closing valve 4
9 is formed to be rotatable between it and the inspection barrel 12, and a bottomed cylindrical valve 49a formed at the other end is rotatably fitted into the annular groove 60a of the barrel end plate 60. There is. The valve 49a crosses the intake passage 47, and at this crossing point there is provided a long hole at an angle θ indicated by reference numeral 49b in the figure. When the long hole 49b corresponds to the intake passage 47, the intake passage 47 is opened, and when the portion without the elongated hole 49b corresponds to the intake passage 47, the intake passage 47 is closed. The angle θ is set slightly larger than the fan-shaped angle occupied by the inspection mechanism 15, and the rotation of the inspection cylinder 12 causes the center of the paper 6 to correspond to the starting end of the inspection mechanism 15, and then the paper 6 is rotated.
The valve 49a is configured to open the intake passage 47 until the tail end of the paper passes the terminal end of the inspection mechanism 15. Note that the body end plate 60 has a portion surrounded by the bottomed cylindrical valve 49a as a disc portion 60.
b and the connecting portions 60c on both sides of the intake passage 47 form a U-shaped cross section.In other words, the intake passage 4
7 and rotates integrally with the trunk end plate 60 main body.

Further, the frame 14 includes a plurality of brushes 51.
are located on the upstream side in the rotational direction of the inspection cylinder 12 with respect to the inspection mechanism 15, and the flocks are fixed in parallel with sliding contact with the cylinder circumferential surface, and as the inspection cylinder 12 rotates, multiple points in the width direction of the paper 6 are moved from the paper edge It is configured to be in close contact with the trunk circumferential surface over the entire length up to the paper tail.
Note that the second inspection cylinder 13 is also configured similarly to the first inspection cylinder 12.

The operation of the printing press 1 configured as above will be explained. The papers 6 stacked on the paper stacking table 7 are sucked by a suction device and sent one by one onto a difference plate 10, and then supplied to a first inspection cylinder 12 by a swing 11. That is, from the claw of the swing 11 to the inspection cylinder 12
The sheet of paper 6 held in the claw 42 of the drum 12 is wound around its circumferential surface as the drum 12 rotates, and is then wrapped around the circumference of the drum 12.
After being held in the claw 42 of the inspection cylinder 13 and wrapped around it, it is held in the claw 20b of the conveyance chain 20 and transported. The conveyed paper sheet 6 is sequentially gripped by the claws of the paper transfer cylinder 23 and the impression cylinder 22, and while being conveyed, a number is printed between the plate cylinder 21 and the impression cylinder 22, and a number is printed on the paper sheet 6. After being conveyed while being held in the claws 30, the paper sheets are released from the claws at the end of the conveyance and stacked on the paper stacking table 31.

The above is a case where the paper 6 has a normal pattern printed on it. However, if a fraudulent paper with a pattern printed overlappingly is supplied to the inspection device 3, the defective spot will be located on the surface of the paper 6. , the back side, either of the inspection mechanisms 15 and 16 detects this and issues a signal, so this signal is delayed by the plate cylinder 21 attachment/detachment mechanism and the number feed mechanism of the number plate. When the plate cylinder 21 is removed from the impression cylinder 22, the number feed of the numberer is stopped.
Therefore, a number is not printed on the fraudulent paper passing between the plate cylinder 21 and the impression cylinder 22, and continuous numbers are printed on the genuine papers before and after the fraudulent paper without any missing numbers. On the other hand, the signals emitted by the inspection mechanisms 15 and 16 are also received by the opening/closing mechanism of the paper discharge claw at a later timing, and the paper is released from the claw at a position further backward than in the case of genuine paper, so that the fraudulent paper is recognized as the genuine paper. is discharged onto the paper discharge tray 33 in a separate path.

In the inspection printing operation performed as described above, since the inspection cylinders 12 and 13 are double cylinders, two sheets of paper 6 are always wrapped around their circumferential surfaces, and the edges of each paper 6 are placed opposite each other. It corresponds to each paper tail suction device 37 at the same time. From this state, inspection cylinder 1
2 and 13 further rotate, the opening/closing valve 49 is fixed to the frame 14 side and remains stationary, so that by the time the central part of the paper 6 approaches the starting end of the inspection mechanisms 15 and 16, the valve 49a is closed. long hole 49
b corresponds to the intake passage 47 and opens it. Therefore, the intake device and intake duct 45 outside this device
Since these are communicated through the intake passage 44 and the intake passage 47, outside air is sucked in through the intake hole 46, and the paper 6 is brought into close contact with the circumferential surfaces of the inspection cylinders 12 and 13. Furthermore, the brush 51 comes into sliding contact with the surface of the paper 6 before the paper 6 is placed in the inspection mechanisms 15 and 16 and pushes it toward the paper edge, further increasing the adhesion. As is clear from FIG. 2, in the double-double inspection cylinders 12 and 13, one of the sheets 6, especially the paper tail portion corresponding to the suction hole 46, is connected to the inspection mechanisms 15 and 13.
When the other paper 6 corresponds to both cylinders 12,1
The mouth is changed every 3 minutes. In contrast, this device is equipped with an on-off valve 49 and sucks air only when the elongated hole 49b shown by the angle θ in the figure corresponds to the intake path 47, so that the paper 6 under inspection is not attracted. During this time, the other intake hole 46 that does not require air intake is closed, so the intake air is concentrated in one intake hole 46, completely preventing loss of suction air, and reducing the adhesion of the paper 6. can be maximized. Note that the on-off valve 49 is secured to the frame 14 by a nut 5.
Since it is rotated by loosening the 0, the angular phase at which the paper 6 is sucked can be freely adjusted.

As is clear from the above description, according to the present invention, an inspection device for an inspection rotary printing press is equipped with an inspection cylinder that conveys printing paper while wrapping it around its circumference, and an inspection mechanism that faces the circumference of the inspection cylinder. A suction duct, which has a plurality of air intake holes drilled from the cylinder circumferential surface and corresponds to the trailing edge of each printing paper wound around the inspection cylinder, extends in the cylinder axis direction on the outer periphery of the cylinder. The duct and the intake device outside the device are connected by a pair of intake passages provided at the end of the body, and each of these intake passages is alternately opened by an on-off valve with one end fixed to the frame side, and the inspection mechanism By providing a brush with flocked hair in sliding contact with the circumferential surface of the inspection cylinder on the upstream side, the printing paper being inspected is pushed by the brush toward the circumferential surface of the cylinder and stretched toward the paper tail. Since the printing paper is attracted to the surface of the inspection cylinder, it adheres to the inspection cylinder without floating up, and during inspection, the intake passage on the non-inspection side is closed with an on-off valve and the intake air is concentrated in the intake hole on the inspection side. Therefore, the loss of suction air is prevented, the adhesion of the paper is further improved, and malfunctions of the inspection mechanism are eliminated, so that the inspection function is significantly improved.

[Brief explanation of drawings]

1 to 3 show an embodiment of an inspection device for an inspection rotary printing press according to the present invention, FIG. 1 is a schematic side view of an inspection rotary printing press in which this is implemented, and FIG. 2 is a side view of the inspection device. 3 are exploded longitudinal cross-sectional views showing the upper and lower halves of the inspection cylinder at positions 90° out of phase with each other in the circumferential direction. 1...Printing machine, 3...Inspection device, 6...Paper, 1
2, 13...Inspection cylinder, 14...Frame, 15,
16...Inspection mechanism, 42...Claw, 45...Intake duct, 46...Intake hole, 47...Intake path, 49...
...Opening/closing valve, 49a... Valve, 51... Brush, 60... Trunk end plate, 60a... Annular groove.

Claims (1)

[Scope of utility model registration request] An inspection device for an inspection rotary printing press 1, comprising inspection cylinders 12 and 13 that grip the end of a printing paper 6 with a claw 42 on the outer periphery and convey it while wrapping it around the circumference, and inspection mechanisms 15 and 16 facing the circumference. 3, each intake air at the ends of the inspection cylinders 12 and 13 is installed between the ends of the inspection cylinders 12 and 13 and extends in the axial direction of the cylinder, and is connected to an air intake device outside the apparatus. Road 4
A pair of intake ducts 45 connected at 7, a plurality of intake holes 46 drilled into the intake ducts 45 from the body peripheral surface, and the inspection barrels 12 and 13 are formed to be rotatable. An opening/closing valve 49 having one end fixed to the frame 14 side, penetrating the core portions of the inspection barrels 12 and 13, and rotatably fitting an annular groove 60a of a barrel end plate 60 into a bottomed cylindrical valve 49a at the other end. The arcuate elongated hole 49b that opens each intake passage 47 at a predetermined position during one rotation of the inspection cylinders 12, 13 is inserted into the valve 4.
The opening/closing valve 49 provided in 9a and the inspection mechanism 1
An inspection rotary printing machine characterized in that a brush 51 is provided on the upstream side in the rotational direction of the inspection cylinders 12 and 13 with respect to the inspection cylinders 12 and 16, and a brush 51 is fixed to the frame 14 side with flocked hair in sliding contact with the circumferential surface of the inspection cylinders 12 and 13. inspection equipment.