JPH0424238B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a sensing device for identifying printed books in a rotary collating machine.

BACKGROUND ART Conventionally, a rotary cylinder mechanism has been known that picks up a book from a book placing table located above and transfers the book to a book feed gutter located below. Of course, with this type of rotary cylinder, it is necessary to judge whether the printing book is correctly held in its mouth, whether an extra printing book is being held in its mouth, or whether no printing book is being held in its mouth. There is.

Conventionally, this determination was made by pressing a roller against the surface of a rotary cylinder and mechanically measuring the thickness of the book inserted between the roller and the rotary cylinder. It was measured by determining whether they matched.

However, according to this method, since the rollers are strongly pressed against the printed book, pressure marks of the rollers are formed on the printed book, and if the paper quality of the printed book is soft, the pressure marks are particularly clearly marked. This had the disadvantage of reducing the commercial value of the product.

In addition, as the ink from the printing press gets on the surface of the roller and dust adheres to this ink, a gap is formed between the roller and the printing book due to the dust, and this distance is also added to determine the thickness of the printing book. There were many. Therefore, even if the printed book is held correctly, the thickness will be different from the preset thickness.
This has the disadvantage that the device stops operating and requires frequent cleaning and adjustment of the measuring device.

Further, as in the invention described in Japanese Utility Model Application Publication No. 58-53746, when a printing book is held in the gripper's mouth, a sensitive lever is formed that changes its position mechanically depending on the thickness of the printing book. It is known that left and right sensors provided at the tips of the paper pass between non-contact type switches to determine the presence of a book, unauthorized gripping, etc.

However, this method measures the thickness using a mechanical method similar to the conventional method described above, and the position of the sensitive lever is mechanically changed by gripping the printing plate with the gripper. The presence or absence of a book, the presence of an incorrect number of books, etc. are measured by a mechanical method, and a non-contact switch is used as the detection signal. Therefore, in the grip part,
When ink, dust, etc. adhere, a gap is formed between the gripping claws and the book, and this gap is also added to determine the thickness of the book. Therefore,
Even if the printing material is correctly held in its mouth, the thickness will be different from the preset thickness, causing the device to stop operating, and the measuring device has the disadvantage of requiring frequent cleaning and adjustment. becomes.

Additionally, in order to mechanically detect the presence or absence of minute thicknesses, precise machining precision and adjustments must be made, which requires an extremely large number of steps and has the disadvantage that accurate measurements cannot always be made. are doing.

Therefore, the present inventor placed a sensor on the outer circumferential surface of the rotary cylinder to measure the capacitance between the rotary cylinder and the surface of the rotary cylinder through the interval at which the printing book passes, and the inventor proposed that Sometimes, by measuring the capacitance with a sensor and comparing this measurement value with a setting value set according to the book being held in its mouth, it is possible to check whether the rotary cylinder is holding the book correctly or whether it is overprinting. He invented a method to determine whether a person is holding a book or a printed copy.

However, the printing press is charged with a lot of static electricity, and when this static electricity comes into contact with or near the sensor electrode, it has a large effect on the sensor, making it difficult to accurately measure capacitance. It became a thing.

Problems to be Solved by the Invention The present invention attempts to solve the above-mentioned problems, and it is possible to measure printed books without reducing the commercial value, and to eliminate measurement errors due to adhesion of dust, etc. One of the purposes is to enable stable confirmation of printed books without causing any problems.

It is also intended to make it possible to check printed books without being affected by static electricity.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention takes a printed book from the printed book mounting table located above,
On the outer circumferential surface of the rotary cylinder that transfers the print books to the print feed gutter located below, and in the sensor located across the print passage interval, a certain amount of electricity is placed on the rotary cylinder side of the electrode plate that senses the capacitance. It consists of a protective coating made of insulating material fixed at intervals.

Function Since the present invention is configured as described above, when a printing book is placed between the rotary cylinder and the sensor, the capacitance is measured by the sensor. By comparing this measured value with the setting value set according to the book to be held in its mouth, it can be determined whether the rotary cylinder is holding the book correctly or if it is not picking up an excess of the book in its mouth. It is possible to determine whether the printed copy has been grabbed or not.

Further, by forming a gap between the electrode plate and the rotary cylinder, the electrode plate is less affected by static electricity that is charged on the printing press, making it possible to accurately measure capacitance. The rationale for this point is not necessarily clear, but by creating a gap, the printing press is closer to the rotary cylinder than the electrode plate, and the static electricity charged on the printing press is transferred to the rotary cylinder. It is thought that this is because it is grounded.

As a result of this, the electrode plate of the sensor is less affected by static electricity, so when a printing book is placed between the rotary cylinder and the sensor, the capacitance is measured by the sensor, and this measurement value is added to the printing book being held. It becomes possible to accurately compare the set values set accordingly without any errors. Therefore, it is possible to accurately determine whether the rotary cylinder is correctly holding a printing book, whether an extra printing book is being held, or whether a printing book is being picked up.

Therefore, instead of the conventional method of using mechanical force such as rollers, it is possible to measure printed matter with high reliability by measuring capacitance, and there is no pressure mark on the printed material. It does not cause measurement errors due to dirt or dust.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 indicates a plurality of rotary cylinders, which are located at appropriate intervals in a rotary collating machine, and are fixed to a common rotating shaft 2 and rotated. . Then, the rotary cylinder 1 is connected to the rotary cylinder 1 via this rotating shaft 2.
Rotating gears 5 and 6 are rotatably supported by fixed shafts 3 and 4 located opposite to each other on one side of the rotary shaft. Engaging rollers 7,
8 stands out.

The engaging rollers 7 and 8 are movably fitted into the cam groove 12 of the grooved cam plate 11. This cam groove 12
is connected to the rotating shaft 2 via a bearing 10,
It does not rotate and is located parallel to one side of the rotary cylinder 1.

Further, the engaging rollers 7 and 8 move within the cam groove 12 as the rotary cylinder 1 rotates, and rotate back and forth about the fixed shafts 3 and 4 as fulcrums.
The rotating gears 5, 6 are engaged with the rotating gears 5, 6.
Actuating gears 13 and 14, which rotate back and forth as the rotary cylinder 6 rotates back and forth, are fixed by actuating shafts 15 and 16 at opposing positions on one side of the rotary cylinder 1 with the rotating shaft 2 interposed therebetween.

L-shaped grip levers 17, 18 are fixedly protruded from the operating gears 13, 14, and the outer ends of the grip levers 17, 18 are bent, and the grip claws 21, 18 are bent.
22 is formed.

Between the gripping claws 21 and 22 and the receiving parts 23 and 24 of the rotary cylinder 1, the book 26 is taken from the book placing table 25 located above the rotary cylinder 1, and the book 26 is placed below the rotary cylinder 1. The printed book 26 is transferred to the printed book feed gutter 27.

This gripping and transfer of the print book 26 to the print feed gutter 27 is performed by maximizing the gap between the gripper claw 21 and the receiving portion 23 until one of the gripper levers 17 grips the print book 26. It is preferable. This maximum opening is performed by placing the engaging roller 7 in an engaging position with the maximum opening portion 28 of the cam groove 12. Then, the separately formed suction nozzle 30 suctions the lower end of the manuscript 26 and places it on the manuscript mounting table 2.
5 and insert it between the gripping claw 21 and the receiving part 23.

Next, due to the rotation of the rotary cylinder 1,
When the engaging roller 7 is located at the closing portion 33, which is the maximum diameter part from the axis of the cam groove 12, the engaging roller 7 moves outward, and along with this movement, the rotating gear 5
is rotated to the left in Fig. 1, and at the same time the operating gear 13
Since it is rotated clockwise, the gripper claw 21 is pressed against the receiving portion 23 and takes up the printing book 26 in its grip.

Then, as the rotary cylinder 1 rotates, the print book 26 held in the rotary cylinder 1 by the grip lever 18 is transferred to the print book mounting table 25.
drawn from. This pulled out printed book 26 is
The printing book 26 is formed between the sensor 31 and the rotary cylinder 1 facing the outer peripheral surface of the rotary cylinder 1.
It passes through the passing interval 32 of .

By passing through this passing interval 32, the capacitance between the sensor 31 and the rotary cylinder 1 when the printing book 26 is positioned is measured. By measuring this capacitance, it is determined whether or not the correct number of books 26 inserted between the rotary cylinder 1 and the sensor 31 is being held in the preset number.

If an incorrect number of sheets are being picked up or not being picked up at all, the operation of the rotary collating machine is stopped and adjustments such as replenishment of the printed books 26 are made.

The above-mentioned determination of whether the printing book 26 is gripped or not is carried out by the method shown in the block diagram of FIG. First, the printed book 26 located on the printed book mounting table 25 is correctly held in the gripping lever 17 or 18 by the above-described method with visual confirmation by the operator. This printed copy 26 was added correctly.
is moved to the passing interval 32, and the rotation of the rotary cylinder 1 is temporarily stopped. In this state, the capacitance corresponding to the thickness, number, etc. of the printed books 26 introduced into the passage interval 32 is measured, and is outputted to the output section 34 as an analog signal. This output enters the amplifier circuit 35 and is boosted to a certain voltage, then rectified by the rectifying and averaging circuit 36, and the amplified and rectified output is
It enters the automatic adjustment circuit 38 via the discrimination circuit 37.

At this time, when the automatic adjustment switch 40 is connected and the timing signal 41 is input in synchronization with the rotation of the rotation shaft 2 at the optimum measurement position of the sensor 31 and the printing book 26, the relay circuit 42 is activated. do. The operation of this relay circuit 42 rotates the micromotor 43 and adjusts the sensitivity adjustment volume 4.
4, the voltage of the discrimination circuit 37 is changed to the voltage of the discrimination circuit 3.
7, which is close to the reference voltage, and fix the sensitivity adjustment volume 44. After this fixation, the automatic adjustment switch 40 is opened and will not close until the next time different types of books 26 are collated.

Through the above operations, the reference capacitance is specified, and this specification is performed by each rotary cylinder 1 provided in a plurality of rotary collating machines.
Since the adjustments are made simultaneously corresponding to the books 26 held in each grip, there is no need to adjust each rotary cylinder 1 one by one as in the conventional case, and extremely efficient adjustment is possible.

When this adjustment is completed, the rotating shaft 2, which has been in a stopped state, rotates again and transfers the book 26 held by the grip lever 18 to the book feed gutter 27.
Move to the top of the screen. Further, the engaging rollers 8 of the rotating gear 6 follow the cam groove 12 and engage the rotating shaft 2.
Since it is located at the open portion 45, the rotating gear 6 is rotated to the right in FIG. 1, and at the same time, the operating gear 14 is rotated to the left. Therefore, the gripping claw 2
2 is separated from the receiving part 24, and the booklet 26 is placed open on the booklet feed gutter 27.

Due to further rotation, the gripping lever 17
, takes the printed book 26 from the printed book mounting table 25 in his mouth,
When located at the sensor 31, the capacitance corresponding to the thickness, number, etc. of the printing book 26 introduced into the passing interval 32 is measured, and an analog signal is output to the output section 34.

This output enters the amplifier circuit 35 and is boosted to a certain voltage, then rectified by the rectifying and averaging circuit 36, and compared with a reference voltage by the discrimination circuit 37. As a result of this comparison, if the output is higher than the reference voltage, it is determined that more copies 26 are being held in the mouth. Moreover, when the output is low, the printed book 26 is not held in its mouth. Therefore, only in these two cases, a voltage is output to the stop circuit 47 via the comparator circuit 46, the stop circuit 47 is activated, the operation of the collating machine is stopped, and necessary operations such as replenishing the printed books are performed. conduct.

Furthermore, when the printing book 26 is normally held in the mouth, the comparator circuit 46 does not output voltage;
The stop circuit 47 is not activated. The sensor 31 used for the above measurement is constructed by fixing a protective coating 51 made of an insulating material such as a resin film to the rotary cylinder 1 side of the electrode plate 48 at a constant interval 50. A space 50 is forcibly formed between the printing plate 26 and the electrode plate 48 to prevent the printed book 26 and the electrode plate 48 from coming into contact with each other.

By forming the gap 50 between the electrode plate 48 and the rotary cylinder 1 in this way, the electrode plate 48 is less affected by the static electricity charged on the printing book 26, making it possible to accurately measure capacitance. can do. Although the rationale for this point is not necessarily clear, by providing the interval 50, the print book 26 is closer to the rotary cylinder 1 than the electrode plate 48, and the print book 26 and the rotary cylinder Although it comes into contact with 1,
The printed book 26 and the electrode plate 48 do not come into contact with each other.
Therefore, it is determined that this is because the static electricity charged on the printed book 26 is grounded to the rotary cylinder 1 side.

Effects of the Invention Since the present invention is configured as described above, when a printing book is placed between the rotary cylinder and the sensor, the capacitance is measured by the sensor, and the capacitance is set according to the measured value and the printing book to be picked up. By comparing the setting value with the set value, it is possible to judge whether the rotary cylinder is holding the printing book correctly, whether it is holding an extra printing book, or whether the printing book is not being picked up. becomes possible. In addition, instead of the conventional method of using mechanical force such as rollers, it is possible to measure printed matter with high reliability by measuring capacitance. There is no measurement error caused by

In addition, since it does not use mechanical methods to measure the presence or absence of printed books, the number of fraudulent copies, etc.
There is no strict requirement for equipment precision, adjustment, etc. Therefore, it has the advantage of being able to provide an inexpensive device and simplifying maintenance.

Furthermore, since the present invention creates a space between the electrode plate and the rotary cylinder when measuring capacitance, the electrode plate is less affected by the static electricity that is charged on the printing press, making it extremely accurate. This makes it possible to measure capacitance.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a plan view of the rotary cylinder section, Fig. 2 is a plan view of the grooved cam plate, Fig. 3 is a block diagram, and Fig. 4 is a sectional view of the sensor. be. 1... Rotary cylinder, 25... Print book mounting table, 26... Print book, 27... Print book feeding gutter, 31
...sensor, 32...passing interval, 48...electrode plate, 51...protective coating.

Claims (1)

[Claims] 1. On the outer circumferential surface of the rotary cylinder that picks up the print from the print mounting table located above and transfers the print to the print feed gutter located below, and on the sensor located across the print passage interval. A sensing device for distinguishing between prints in a rotary collating machine, characterized in that a protective film made of an insulating material is fixed at a fixed interval to the rotary cylinder side of an electrode plate for sensing capacitance.