JP7078321B2 - Insertion paper removing device and interleaving paper removal method - Google Patents

Description

The present invention relates to an interleaving paper removing device and an interleaving paper removing method.

In recent years, in the printing industry, a computer to plate (CTP) device that directly records an image on a printing plate (printing plate) without using a film has been used. The printing plate used in the CTP device is made of a metal such as aluminum, and is stored in the case in a state of being alternately laminated with paper called interleaving paper.

When the printing plate is supplied to the CTP device, the interleaving paper is removed by the interleaving paper removing device. The interleaving paper removing device is equipped with a plurality of adsorption means for adsorbing the interleaving paper by vacuum adsorption. The printing plate may also be adsorbed. In the present specification, the fact that the printing plate is also adsorbed when the interleaving paper is removed is referred to as interleaving paper co-taking.

One of the reasons why the interleaving paper is co-picked is that when the air-permeable interleaving paper is adsorbed by the adsorbing means, the printing plate is also adsorbed through the interleaving paper. Another reason is that the printing plate adheres to the interleaving paper due to static electricity or the like. For example, Patent Document 1 proposes a technique for detecting interlocking with a metal sensor using a metal sensor.

Japanese Unexamined Patent Publication No. 2000-247460

When the metal sensor detects the interlocking of the interleaving paper, the metal sensor can detect the printing plate if the metal sensor is arranged near the suction means in which the interleaving paper is co-collected. However, if interlocking of interleaving paper occurs in the suction means located far from the metal sensor, the printing plate may not approach the distance that the metal sensor can detect. Therefore, the printing plate cannot be detected even by the metal sensor, and it may not be possible to suppress the interlocking of the interleaving paper.

One aspect of the disclosed technique is aimed at more effectively curbing the occurrence of interleaving paper.

One aspect of the disclosed technique is exemplified by the following interleaving paper remover. This interleaving paper removing device is arranged above the interleaving paper placed on the printing plate, and has a plurality of suction means capable of sucking and adsorbing the interleaving paper, and a first position for adsorbing the interleaving paper. Next to the elevating means for raising and lowering the plurality of suction means between the discharging means for discharging the interleaving paper and the second position for discharging the interleaving paper, and the adsorbing means of any one of the plurality of adsorbing means. The control means includes a metal sensor for detecting a printing plate made of metal and a control means, and the control means lowers the plurality of suction means to the first position and the plurality of suction means. The first operation of adsorbing the interleaving paper to some of the adsorbing means including the adsorbing means located next to the metal sensor, and the plurality of adsorbing means to the third position which is a predetermined distance higher than the first position. By the second operation of raising and lowering the plurality of suction means from the third position while causing the plurality of suction means to perform suction, the interleaving paper can be applied to the suction means other than some of the suction means. It is characterized in that a third operation of sucking and a fourth operation of raising the plurality of suction means to the second position and causing the discharging means to discharge the interleaving paper.

In the disclosed technique, the plurality of adsorption means may be arranged in a single row or may be arranged in a plurality of rows. In the first operation, the interleaving paper is adsorbed by some of the adsorbing means among the plurality of adsorbing means, and by lifting the adsorbed interleaving paper in the second operation, the interleaving paper and the printing plate located under the interleaving paper are obtained. A space can be provided between the two. In the third operation, when adsorbing to a plurality of suction means, the space between the interleaving paper and the printing plate makes it difficult for the interleaving paper to be co-picked. Therefore, according to the disclosed technique, it is possible to more effectively suppress the occurrence of interlocking paper.

One aspect of the disclosed technique may be the following interleaving paper remover. This interleaving paper removing device is placed on a printing plate and is arranged above a flexible interleaving paper, and a plurality of adsorbing means capable of sucking and adsorbing the interleaving paper and the interleaving paper are combined with the interleaving paper. The plurality of means for raising and lowering the plurality of suction means between the first position for adsorbing and the second position for discharging the interleaving paper to the discharging means for discharging the interleaving paper, and control means. The suction means of the above are arranged in a row along the width direction of the interleaving paper, which is a direction orthogonal to the direction in which the interleaving paper is ejected toward the ejection means, and the control means is the plurality of adsorption means. The first operation of lowering the sheet to the first position to adsorb the interleaving paper to a part of the adhering means located at the center in the width direction of the interleaving paper among the plurality of adsorbing means, and the plurality of adsorbing means. Is raised to a third position higher than the first position by a predetermined distance, and a chevron having the part of the suction means as the apex between the interleaving paper adsorbed on the part of the suction means and the printing plate below the interleaving paper. By the second operation of forming the space of the above and by lowering the plurality of suction means from the third position while causing the plurality of suction means to perform suction, the suction means other than some of the suction means can also be used. It is characterized in that a third operation of sucking the interleaving paper and a fourth operation of raising the plurality of adsorbing means to the second position and causing the discharging means to eject the interleaving paper are executed.

The disclosed technique may further have the following features: A metal sensor for detecting a printing plate made of metal is provided next to one of the plurality of suction means, and some of the suction means are located next to the metal sensor. including. According to such a technique, even if interlocking of interleaving paper occurs, coexisting of interleaving paper can be suitably detected by detecting the printing plate with a metal sensor located next to the suction means.

The disclosed technique may further have the following features: In the third operation, the control means continues the descent until the pressure sucked by the plurality of suction means becomes equal to or higher than a threshold value indicating that the interleaving paper is sucked. According to such a technique, the suction of the interleaving paper by the plurality of adsorption means is further lowered by continuously lowering the plurality of adsorption means until the adsorption of the interleaving paper by the plurality of adsorption means is detected based on the pressure. It will be certain.

The disclosed technique may further have the following features: In the first operation, a part of the suction means among the plurality of suction means is one of the plurality of suction means. According to such a technique, by sucking and lifting the interleaving paper by one adsorption means, the adsorption means can be raised as soon as the adsorption of the interleaving paper by the one adsorption means is detected, so that the processing speed can be increased. Can be improved.

The disclosed technique can also be grasped from the aspect of the interleaving paper removing method for removing the interleaving paper.

The technique of the present disclosure can more effectively suppress the occurrence of interlocking paper.

FIG. 1 is a diagram showing an example of a printing plate supply device according to an embodiment. FIG. 2 is a diagram showing an example of the configuration of the suction device. FIG. 3 is a diagram showing an example of the vicinity of the suction device in the printing plate supply device. FIG. 4 is an example of a view of the printing plate supply device 1 according to the embodiment as viewed from above. FIG. 5 is an example of a functional block diagram of the printing plate supply device. FIG. 6 is a diagram showing an example of the interleaving paper removing method according to the first comparative example. FIG. 7 is a diagram showing an example of the interleaving paper removing method according to the second comparative example. FIG. 8 is a diagram showing an outline of the interleaving paper removing method according to the embodiment. FIG. 9 is a first diagram showing an example of the interleaving paper removing method according to the embodiment. FIG. 10 is a second diagram showing an example of the interleaving paper removing method according to the embodiment. FIG. 11 is a third diagram showing an example of the interleaving paper removing method according to the embodiment.

Hereinafter, the interleaving paper removing device and the interleaving paper removing method using the interleaving paper removing device according to the embodiment will be described with reference to the drawings. The configurations of the embodiments shown below are examples, and the disclosed techniques are not limited to the configurations of the embodiments.

<Embodiment>
FIG. 1 is a diagram showing an example of a printing plate supply device 1 according to an embodiment. FIG. 1 is an example of a side view of the printing plate supply device 1. The printing plate supply device 1 is a printing plate supply device that supplies a printing plate to a CTP device, and is placed on the floor via wheels. The printing plate supply device 1 includes a cassette 11, a suction device 12, a transport mechanism 13, an optical sensor 14, and a paper slip collection box 15. Hereinafter, in the present specification, the side on which the CTP device to be transported to the printing plate is arranged is referred to as the front, and the opposite direction is referred to as the back. The floor side is on the bottom and the suction device 12 side is on the top. Further, in FIG. 1, the direction from the front to the back of the paper is defined as the depth direction. Hereinafter, the printing plate supply device 1 according to the embodiment will be described with reference to the drawings.

The printing plate supply device 1 is a device that supplies a printing plate to a CTP device. In the printing plate supply device 1, since the printing plate and the interleaving paper are alternately stacked on the cassette 11, the printing plate supply device 1 supplies the interleaving paper when supplying the printing plate to the CTP device. Remove. The printing plate supply device 1 for removing the interleaving paper can be said to be an example of the "interval sheet removing device". Above the cassette 11, a suction device 12 for sucking the interleaving paper and the printing plate stored in the cassette 11 by vacuum suction by a vacuum pump described later is provided. The suction device 12 is provided so as to be movable in the vertical direction and the front-back direction. In the suction device 12 included in the printing plate supply device 1, a plurality of suction devices 12 are arranged side by side in the depth direction of FIG. The suction device 12 is moved in the vertical direction and the front-back direction by the drive mechanism 16, and the sucked printing plate or interleaving paper can be transported toward the transfer mechanism 13.

The transport mechanism 13 is a transport mechanism that transports the printing plate in the forward direction from the printing plate supply device 1, and includes a transport roller 131, a nip roller 132, and a course changing member 133. When the nip roller 132 moves toward the transfer roller 131 with the printing plate or interleaving paper on the transfer roller 131, the printing plate or interleaving paper on the transfer roller 131 is niped with the transfer roller 131. It is sandwiched by the rollers 132. In this state, the transfer roller 131 and the nip roller 132 are rotated by a motor (not shown), so that the interleaving paper or the printing plate is conveyed in the forward direction.

The course changing member 133 is a member that changes the traveling direction of the printing plate or interleaving paper conveyed by the conveying roller 131 and the nip roller 132. When the optical sensor 14 detects the printing plate, the course changing member 133 is driven so as to direct the traveling direction toward the CTP device, and when the optical sensor 14 detects the interleaving paper, the traveling direction is input to the interleaving paper. Driven towards mouth 151. The transport mechanism 13 is an example of a “discharge means”.

The optical sensor 14 is an optical sensor that detects an object using light. The optical sensor 14 is provided at a position where light can be applied to the cassette 11. By irradiating the cassette 11 with light, the optical sensor 14 is placed on the top of the cassette 11 (that is, the one that is adsorbed by the adsorption device 12 next) is a printing plate or a slip sheet. Detect if there is. The optical sensor 14 detects whether the object irradiated with light is a printing plate or a slip sheet by detecting, for example, a difference in light reflectance, light transmittance, or color of an object.

The interleaving paper collection box 15 is a container into which the interleaving paper removed by the printing plate supply device 1 is charged. In the interleaving paper collection box 15, the interleaving paper whose course is directed to the interleaving paper input port 151 by the path changing member 133 is collected. The interleaving paper collection box 15 does not necessarily have to be installed.

FIG. 2 is a diagram showing an example of the configuration of the suction device 12. FIG. 2 also illustrates a vacuum pump 18 connected to the suction device 12. The suction device 12 includes a suction pad 121, a base 122, an arm 123, and a connection port 124, and is attached to the drive mechanism 16 by the base 122. The suction pad 121 is made of an elastic member such as rubber and has a mortar-shaped shape with an open bottom. The vacuum sensor 125 detects the air pressure in the suction pad 121. The arm portion 123 is a shaft portion located between the suction pad 121 and the base portion 122.

The connection port 124 is a connection portion to which the vacuum pipe 181 from the vacuum pump 18 is connected, and the connection port 124 and the inside of the suction pad 121 communicate with each other. The vacuum pipe 181 is a pipe formed in a hollow shape. A solenoid valve 182 is provided on the vacuum pipe 181 between each of the suction devices 12 and the vacuum pump 18, and the solenoid valve 182 controls the opening and closing of the path between each of the suction devices 12 and the vacuum pump 18. Will be done. The printing plate supply device 1 includes one vacuum pump 18, and the vacuum pump 18 is shared by a plurality of suction devices 12 as illustrated in FIG. The drive mechanism 16 is a transport means that enables the suction device 12 to move in the vertical direction and the front-back direction. The adsorption device 12 is an example of "adsorption means". The drive mechanism 16 is an example of "elevating means".

In the suction device 12, the connection port 124 and the inside of the suction pad 121 communicate with each other, and the vacuum pipe 181 connecting the connection port 124 and the vacuum pipe 181 has a hollow shape. Therefore, the vacuum pump 18 has air from inside the suction pad 121. Can be sucked. That is, by sucking the air in the suction pad 121 with the vacuum pump 18 in a state where the suction pad 121 is in contact with the interleaving paper or the printing plate, the adsorbing device 12 can adsorb the interleaving paper or the printing plate. Further, by moving the suction device 12 by the drive mechanism 16, the printing plate supply device 1 can lift and move the interleaving paper or the printing plate sucked by the suction device 12.

FIG. 3 is a diagram showing an example of the vicinity of the suction device 12 in the printing plate supply device 1, and FIG. 3 is an example of a state in which the suction device 12 is viewed from the rear in FIG. A metal sensor 17 is arranged between the suction device 12c and the suction device 12d and in the vicinity of the suction device 12d. The metal sensor 17 is a sensor that detects metal, and the printing plate supply device 1 is provided with one metal sensor 17. Since the printing plate is made of a metal such as aluminum, the metal sensor 17 can detect the approach of the printing plate. An optical sensor 14 is arranged between the suction device 12d and the suction device 12e.

FIG. 4 is an example of a view of the printing plate supply device 1 according to the embodiment as viewed from above. In FIG. 4, the range including the drive mechanism 16 and the cassette 11 in the printing plate supply device 1 is exemplified, and the suction device 12, the optical sensor 14, and the metal sensor 17 provided below the drive mechanism 16 are exemplified by dotted lines. .. As illustrated in FIG. 4, the plurality of suction devices 12 (from the suction device 12a to the suction device 12g) transport the interleaving paper toward the interleaving paper input port 151 or the printing plate toward the CTP device. They are arranged side by side in the direction orthogonal to the direction of the paper. Hereinafter, in the present specification, the direction orthogonal to the direction in which the interleaving paper is conveyed toward the interleaving paper input port 151 and the printing plate is conveyed toward the CTP device is referred to as the width direction of the interleaving paper. The metal sensor 17 is located between the suction device 12c and the suction device 12d, and is arranged on the suction device 12d side. The optical sensor 14 is located between the suction device 12d and the suction device 12e, and is arranged on the suction device 12d side. That is, the adsorption device 12d arranged near the center of the plurality of adsorption devices 12 is the adsorption device 12 arranged next to the metal sensor 17 and the optical sensor 14, and is the closest to the metal sensor 17 and the optical sensor 14. It can be said that the suction device 12 is arranged in.

<Functional block>
The functional block of the printing plate supply device 1 will be described. FIG. 5 is an example of a functional block diagram of the printing plate supply device 1. The suction device 12, the transport mechanism 13, the optical sensor 14, the drive mechanism 16, and the metal sensor 17 described above are collectively controlled by the control unit 55. The configuration of the control unit 55 as hardware is the same as that of a general computer. That is, the control unit 55 has a CPU 551 that performs various arithmetic processes, a read-only memory (ROM) 552 that stores basic programs, and a Random access memory (RAM) that is a read / write memory that stores various information. It is equipped with 553 and the like. The auxiliary storage unit 57 is a storage unit accessible to the control unit 55, and stores the program P executed by the control unit 55 and various data. In the present embodiment, the CPU 551 of the control unit 55 reads the program P from the auxiliary storage unit 57 into the RAM 553 and executes it to control the suction device 12, the transfer mechanism 13, the optical sensor 14, the drive mechanism 16, and the metal sensor 17. Is done. The control unit 55 is an example of “control means”.

<First comparative example>
FIG. 6 is a diagram showing an example of the interleaving paper removing method according to the first comparative example. In FIG. 6, for convenience of explanation, the description of the suction device 12a, the suction device 12b, the suction device 12f, and the suction device 12g is omitted from the suction device 12. Further, the arrows in FIG. 6 exemplify the moving direction of the suction device 12. In the first comparative example, an example in which all the suction devices 12 included in the printing plate supply device 1 descend toward the interleaving paper all at once to adsorb the interleaving paper and remove the interleaving paper will be described.

In the first comparative example, first, as illustrated in FIG. 6A, all the suction devices 12 provided in the printing plate supply device 1 simultaneously aim at the cassette 11 by the drive mechanism 16 while performing suction. Go down. Due to the unevenness of the printing plate surface, one of the suction devices 12 often reaches the interleaving paper before the other suction devices 12 even if they are lowered all at once. FIG. 6B illustrates how the suction device 12e reaches the interleaving paper before the other suction devices 12. That is, in the state of FIG. 6B, the suction device 12e is sucking the interleaving paper, but the adsorption device 12c and the adsorption device 12d are in the process of descending toward the interleaving paper, so that the adsorption device 12c and The suction device 12d does not suck the interleaving paper. As described above, since one vacuum pump 18 is connected to each of the plurality of suction devices 12, the suction device 12e that starts suction before the other suction devices 12 has a stronger suction force than usual. Adsorbs paper. Therefore, in the suction device 12e, the interleaving paper co-picking that adsorbs the printing plate together with the interleaving paper is likely to occur. In FIG. 6C, the suction device 12d and the suction device 12c that reach the interleaving paper later than the suction device 12e also adsorb the interleaving paper, and the suction device 12 is lifted by the drive mechanism 16. Since the interleaving paper is taken together in the adsorbing device 12e, the adsorbing device 12e lifts the interleaving paper and the printing plate.

If the suction device 12 in which the interlocking is generated is the adsorption device 12d provided in the vicinity of the metal sensor 17, the control unit 55 detects the printing plate by the metal sensor 17 to generate the interlocking. Can be detected. However, in the first comparative example, it is the suction device 12e provided at a position away from the metal sensor 17, and the interleaving paper co-picking does not occur in the other suction devices 12. Therefore, since the suction device 12d arranged closest to the metal sensor 17 does not lift the printing plate, the printing plate does not approach the metal sensor 17, and the metal sensor 17 cannot detect the printing plate.

<Second comparative example>
In the first comparative example, an example of a situation in which interlocking of interleaving papers occurs has been described. In the second comparative example, a method for removing the interleaving paper, which suppresses the occurrence of the interleaving paper by using a rubber spatula, will be described. FIG. 7 is a diagram showing an example of the interleaving paper removing method according to the second comparative example. Hereinafter, the second comparative example will be described with reference to FIG. 7.

FIG. 7A is a diagram showing an example of a state before the tip rubber portion 510 of the rubber spatula drive device 500 comes into contact with the interleaving paper. In the second comparative example, the rubber spatula driving device 500 is provided in at least one of the suction devices 12. The rubber spatula drive device 500 includes a rubber spatula 530 and a drive unit 540. The rubber spatula 530 includes a handle portion 520, one of which is connected to the drive portion 540 and the other of which is provided with a tip rubber portion 510. The tip rubber portion 510 is provided on the side of the rubber spatula 530 that comes into contact with the interleaving paper. The rubber spatula 530 is driven by the drive unit 540 so as to move a predetermined distance toward the suction device 12 along the surface of the interleaving paper.

FIG. 7B is a diagram showing an example of a state in which the tip rubber portion 510 in contact with the interleaving paper has moved a predetermined distance toward the suction device 12 along the surface of the interleaving paper. When the tip rubber portion 510 moves toward the suction device 12 along the surface of the interleaving paper, the interleaving paper bends and a space 550 is formed between the interleaving paper and the printing plate. In the second comparative example, the suction device 12 sucks the portion bent by the rubber spatula drive device 500 of the interleaving paper, so that the interleaving paper co-picking is suppressed.

The frictional force generated between the tip rubber portion 510 and the interleaving paper differs depending on the type of paper used for the interleaving paper. The frictional force generated between the tip rubber portion 510 and the interleaving paper may change due to aging of the tip rubber portion 510. For these reasons, it may not be possible to properly bend the interleaving paper even if the rubber spatula 530 is driven. Further, since the height of the interleaving paper may differ due to the unevenness of the printing plate or the like, even if the driving unit 540 drives the rubber spatula 530, the tip rubber portion 510 may swing without contacting the interleaving paper. .. Further, when the printing plate supply device 1 is a film surface suction method in which the printing surface of the printing plate is sucked and lifted by the suction device 12, if the mechanism of the second comparative example is adopted, the interleaving paper is squeezed by the tip rubber portion 510. This may cause scratches on the printed surface of the printing plate. Further, since the second comparative example has a configuration in which the rubber spatula drive device 500 is added to the printing plate supply device 1, the interleaving paper removing method according to the second comparative example is applied to the existing printing plate supply device 1. It is difficult.

<Method for removing interleaving paper according to the embodiment>
FIG. 8 is a diagram showing an outline of the interleaving paper removing method according to the embodiment. In FIG. 8, as in FIG. 6, for convenience of explanation, the description of the adsorption device 12a, the adsorption device 12b, the adsorption device 12f, and the adsorption device 12g is omitted from the adsorption device 12. Hereinafter, the outline of the interleaving paper removing method according to the embodiment will be described with reference to FIG.

First, as illustrated in FIG. 8A, the drive mechanism 16 is a printing plate supply device in a state where suction is started only for the suction device 12d, which is the suction device 12 provided at the position closest to the metal sensor 17. The suction device 12 provided in 1 is lowered all at once toward the interleaving paper. When the suction device 12 and the interleaving paper are brought into contact with each other in this state, the adsorbing device 12d is in a state of adsorbing the interleaving paper. Next, as illustrated in FIG. 8B, all the suction devices 12 are moved upward with only the suction device 12d sucking the interleaving paper. By such processing, even if interlocking of interleaving paper occurs in the suction device 12d, the printing plate can be detected by the metal sensor 17 provided near the suction device 12d. Further, when the interleaving paper is not co-picked, as illustrated in FIG. 8B, the interleaving paper has a shape bent into a chevron shape with the portion adsorbed by the adsorbing device 12d as the apex. A space 190 is formed between the interleaving paper and the printing plate.

9 to 11 are views showing an example of the interleaving paper removing method according to the embodiment. 9 to 11 are examples of detailed procedures of the interleaving paper removing method outlined in FIG. 8. Hereinafter, an example of the interleaving paper removing method according to the embodiment will be described with reference to FIGS. 9 to 11.

In S1, the control unit 55 determines whether the printing plate is placed on the uppermost portion of the cassette 11 or the interleaving paper is placed based on the detection result of the optical sensor 14. That is, the control unit 55 determines whether the adsorption target to be adsorbed by the adsorption device 12 is a printing plate or a slip sheet. For example, the auxiliary storage unit 57 stores each of the light reflectance due to the printing plate and the light reflectance due to the interleaving paper in advance when the optical sensor 14 irradiates the light, and the control unit 55 stores the light. By comparing the reflectance and the reflectance of the light emitted by the optical sensor 14, it is possible to determine whether the printing plate or the interleaving paper is used. If the printing plate is placed on the top of the cassette 11, the process proceeds to S2. If the interleaving paper is placed on the top of the cassette 11, the process proceeds to S3.

In S2, the control unit 55 controls the course change member 133 so that the course of the printing plate conveyed by the transfer roller 131 and the nip roller 132 becomes the CTP device. The control unit 55 drives the suction device 12 and the drive mechanism 16 to suck the printing plate, and conveys the sucked printing plate toward the transfer mechanism 13. The control unit 55 moves the nip roller 132 toward the transfer roller 131, so that the printing plate conveyed toward the transfer mechanism 13 is sandwiched between the transfer roller 131 and the nip roller 132. The control unit 55 stops the suction by the suction device 12, and rotates the transfer roller 131 and the nip roller 132 in a state where the plate is sandwiched between the transfer roller 131 and the nip roller 132, whereby the plate is transferred to the CTP device. Transport.

In S3, the control unit 55 controls the solenoid valve 182 to start suction by the vacuum pump 18 for the suction device 12 arranged closest to the metal sensor 17. That is, in S3, the control unit 55 opens the solenoid valve 182 provided in the vacuum pipe 181 connected to the suction device 12 arranged closest to the metal sensor 17, and is connected to another suction device 12. With respect to the solenoid valve 182 provided in the vacuum pipe 181 is closed, suction by the vacuum pump 18 is started.

In S4, the control unit 55 drives the drive mechanism 16 to lower the suction device 12. In S5, the control unit 55 determines whether or not the suction device 12 has sucked the interleaving paper based on the pressure detected by the vacuum sensor 125. For example, the pressure detected by the vacuum sensor 125 when the interleaving paper is adsorbed is stored in advance in the auxiliary storage unit 57 as a threshold value. The control unit 55 may determine whether or not the suction device 12 has sucked the interleaving paper depending on whether or not the pressure detected by the vacuum sensor 125 exceeds the threshold value. If the interleaving paper is adsorbed, the process proceeds to S6. If the interleaving paper is not adsorbed, the process proceeds to S4. That is, the suction device 12 continues to descend until it is determined by the control unit 55 that the interleaving paper has been sucked. The position determined to have adsorbed the interleaving paper in S5 is an example of the "first position". The processing of S4 and S5 is an example of the "first operation".

In S6, the control unit 55 drives the drive mechanism 16 to raise the suction device 12 by the first ascending distance and then lower it by the first descending distance. The first ascending distance is set longer than the first descending distance, for example, the first ascending distance is 60 mm and the first descending distance is 30 mm. A position in which the position is raised by the first ascending distance and then lowered by the first descending distance is an example of the "third position". The processing of S6 is an example of the "second operation".

In S7, the control unit 55 determines whether or not the metal sensor 17 has detected metal. That is, in S7, it is determined whether or not the interlocking of the interleaving paper has occurred. When the metal sensor 17 detects the metal, that is, when the interleaving paper is taken together, the process proceeds to S8. If the metal sensor 17 does not detect the metal, that is, if the interlocking of the interleaving paper has not occurred, the process proceeds to S9.

In S8, the control unit 55 ends the suction by the vacuum pump 18. When the suction by the vacuum pump 18 is completed, the interleaving paper and the printing plate adsorbed by the suction device 12 are returned to the inside of the cassette 11. After that, the control unit 55 raises the suction device 12 to the original position (the position where the processing of S1 is started). The process proceeds to S3.

In S9, the control unit 55 controls the solenoid valve 182 to start suction on the suction device 12 other than the suction device 12 arranged closest to the metal sensor 17. In S10, the control unit 55 drives the drive mechanism 16 to lower the suction device 12 at a lowering speed lower than the lowering speed when the first lowering distance is reached in S6. The processing of S9 and S10 is an example of the "third operation".

In S11, it is determined whether or not the suction device 12 has sucked the interleaving paper by the same processing as in S5. When the suction device 12 sucks the interleaving paper, the process proceeds to S12. If the suction device 12 is not sucking the interleaving paper, the process proceeds to S10, and the lowering of the suction device 12 is continued.

In S12, the control unit 55 raises the suction device 12 by the second ascending distance by driving the drive mechanism 16. The second climbing distance is a longer distance than the first climbing distance, for example, 100 mm.

In S13, it is determined whether or not the metal sensor 17 has detected metal by the same processing as in S7. If the metal sensor 17 detects metal, the process proceeds to S3. If the metal sensor 17 does not detect the metal, the process proceeds to S14.

In the processing after S14, the processing of discharging the interleaving paper adsorbed by the adsorption device 12 is executed. In S14, the control unit 55 controls the course changing member 133 so that the path of the interleaving paper conveyed by the conveying roller 131 and the nip roller 132 becomes the interleaving paper input port 151. By driving the drive mechanism 16, the control unit 55 lifts the interleaving paper adsorbed by the suction device 12 and conveys it to the height of the transfer mechanism 13. The conveyed interleaving paper is placed on the transfer roller 131 of the transfer mechanism 13. In S15, the control unit 55 moves the nip roller 132 toward the transfer roller 131 so that the transfer roller 131 and the nip roller 132 hold the interleaving paper. The height of the transport mechanism 13 is an example of the "second position". The processing of S14 to S17 is an example of the "fourth operation".

In S16, the control unit 55 ends the suction by the vacuum pump 18. In S17, the control unit 55 loads the interleaving paper into the interleaving paper collection box 15 through the interleaving paper input port 151 by rotating the transport roller 131 and the nip roller 132.

<Action and effect of the embodiment>
In the embodiment, the control unit 55 lowers all the suction devices 12 in a state where one suction device 12 sucks, as illustrated in the processes of S3 to S6 in FIG. The interleaving paper is adsorbed on the adsorption device 12 of the table. After that, the control unit 55 raises all the suction devices 12 to lift the interleaving paper by one adsorbing device 12 and form a space 190 between the interleaving paper and the printing plate. Since the control unit 55 adsorbs the interleaving paper by the other adsorbing device 12 in a state where the space 190 is formed between the interleaving paper and the printing plate, the possibility that the interleaving paper co-picking occurs is reduced according to the embodiment. Will be done.

In the embodiment, as illustrated in the processes S3 to S6 of FIG. 9, the interleaving paper is lifted by the suction device 12 arranged closest to the metal sensor 17, even if the interleaving paper co-picking occurs. , The printing plate co-taken with the interleaving paper can be suitably detected by the metal sensor 17 arranged near the adsorbing device 12 that adsorbs the interleaving paper.

In the embodiment, when the metal sensor 17 arranged near the adsorption device 12 that has adsorbed the interleaving paper detects the interlocking of the interleaving paper, the suction by the adsorbing device 12 is terminated and the adsorbed paper is adsorbed by the adsorbing device 12. The interleaving paper and the printing plate were returned to the cassette 11. Therefore, according to the embodiment, it is possible to prevent the interleaving paper from being conveyed to the CTP device even if the interleaving paper co-collection occurs.

In the embodiment, unlike the second comparative example, the interleaving paper does not have to be rubbed by the rubber tip portion 510. Therefore, even if the embodiment is applied to the film surface adsorption type printing plate supply device 1, it is under the interleaving paper. It is possible to reduce the possibility of damaging the printing plate placed on the plate.

In the embodiment, as in the process of S10 to S11 in FIG. 10, the control unit 55 lowers the suction device 12 at a lowering speed lower than the lowering speed in S6, thereby between the interleaving paper and the printing plate. It is possible to increase the possibility that the suction device 12 sucks the interleaving paper in the presence of the formed space 190. Since the suction device 12 is more likely to be adsorbed in the state where the space 190 is present between the interleaving paper and the printing plate, the possibility of co-collecting the interleaving paper is reduced according to the embodiment. Further, according to the embodiment, there is a possibility that the suction device 12 may damage the printing plate by pressing the printing plate due to the suction of the interleaving paper by the plurality of suction devices 12 in the presence of the space 190. Is reduced.

The interleaving paper removing method according to the embodiment can be realized without adding hardware parts to the existing printing plate supply device. That is, by installing the program P for executing the interleaving paper removing method according to the present embodiment in the existing printing plate supply device, the existing printing plate supply device executes the interleaving paper removing method according to the present embodiment. be able to.

<First modification>
In the embodiment, the suction device 12 arranged closest to the metal sensor 17, that is, the suction device 12 arranged in the center among the plurality of suction devices 12 provided, sucks and lifts the interleaving paper to form the interleaving paper. A space 190 was formed between the printing plate and the printing plate. However, forming the space 190 between the interleaving paper and the printing plate is not limited to the adsorbing device 12 arranged at the center of the plurality of adsorbing devices 12 provided for adsorbing and lifting the interleaving paper. A space 190 may be formed between the interleaving paper and the printing plate by adsorbing and lifting the interleaving paper by an adsorbing device 12 other than the adsorbing device 12 arranged in the center among the plurality of adsorbing devices 12 provided. ..

<Second modification>
In the embodiment, the space 190 is formed by the suction device 12 of one of the plurality of suction devices 12 sucking and lifting the interleaving paper, but the space 190 is formed by the plurality of adsorption devices 12 of the plurality of adsorption devices 12. Space 190 may be formed by adsorbing and lifting the paper. That is, the space 190 may be formed by a part of the suction devices 12 among the plurality of suction devices 12. By adsorbing the interleaving paper by the plurality of adsorbing devices 12, the interleaving paper can be sucked in a more stable state than in the embodiment. On the other hand, in the embodiment, as illustrated in the processes of S3 to S6 of FIG. 9, since the interleaving paper is adsorbed by one adsorption device 12, as soon as the adsorption of the interleaving paper by the one adsorption device 12 is detected. The suction device 12 can be raised. Therefore, according to the embodiment, the processing can be performed at a higher speed than the second modification.

<Third modification example>
In the embodiment, a plurality of suction devices 12 are arranged side by side in a row along the width direction of the interleaving paper, but the arrangement of the suction devices 12 is not limited to such an arrangement. The suction device 12 may be arranged in a plurality of rows, for example.

The embodiments and modifications disclosed above can be combined with each other.

1 ・ ・ Printing plate supply device 11 ・ ・ Cassette 12 ・ ・ Suction device 121 ・ ・ Suction pad 122 ・ ・ Base 123 ・ ・ Arm part 124 ・ ・ Connection port 125 ・ ・ Vacuum sensor 13 ・ ・ Transfer mechanism 131 ・ ・ Transfer roller 132 ・ ・ Nip roller 133 ・ ・ Course change member 14 ・ ・ Optical sensor 15 ・ ・ Insert paper collection box 151 ・ ・ Insert paper input port 16 ・ ・ Drive mechanism 17 ・ ・ Metal sensor 18 ・ ・ Vacuum pump 181 ・ ・ Vacuum pipe 182 ... Electromagnetic valve 190, 550 ... Space 55 ... Control unit 57 ... Auxiliary storage unit 551 ... CPU
552 ... ROM
553 ... RAM
500 ・ ・ Rubber spatula drive device 510 ・ ・ Tip rubber part 520 ・ ・ Handle part 530 ・ ・ Rubber spatula 540 ・ ・ Drive part

Claims (6)

A plurality of suction means arranged above the slip sheet placed on the printing plate and capable of sucking and sucking the slip sheet, and
An elevating means for raising and lowering the plurality of suction means between a first position for adsorbing the interleaving paper and a second position for ejecting the interleaving paper to the discharging means for discharging the interleaving paper.
A metal sensor provided next to one of the plurality of suction means and detecting a printing plate made of metal, and a metal sensor.
With control means,
The control means is
The first operation of lowering the plurality of suction means to the first position and sucking the interleaving paper on some of the suction means including the suction means located next to the metal sensor among the plurality of suction means. When,
A second operation of raising the plurality of suction means to a third position higher than the first position by a predetermined distance,
A third operation of lowering the plurality of suction means from the third position while causing the plurality of suction means to suck the slip sheet to suction means other than some of the suction means.
It is characterized in that the fourth operation of raising the plurality of suction means to the second position and causing the discharge means to discharge the interleaving paper is performed.
Insertion remover. A plurality of suction means that are placed on a printing plate and are placed above a bendable slip sheet and that can suck and suck the slip sheet.
An elevating means for raising and lowering the plurality of suction means between a first position for adsorbing the interleaving paper and a second position for ejecting the interleaving paper to the discharging means for discharging the interleaving paper.
With control means,
The plurality of suction means are arranged in a row along the width direction of the interleaving paper, which is a direction orthogonal to the direction in which the interleaving paper is discharged toward the discharging means.
The control means is
The plurality of adsorption means are lowered to the first position, and the combination of the plurality of adsorption means is used.
The first operation of adsorbing the interleaving paper to some of the adsorbing means located in the center in the width direction of the paper,
By raising the plurality of suction means to a third position higher than the first position by a predetermined distance, the partial suction means is sucked between the interleaving paper adsorbed on the partial suction means and the printing plate below the interleaving paper. The second movement that forms a mountain-shaped space with the peak of
A third operation of lowering the plurality of suction means from the third position while causing the plurality of suction means to suck the slip sheet to suction means other than some of the suction means.
It is characterized in that the fourth operation of raising the plurality of suction means to the second position and causing the discharge means to discharge the interleaving paper is performed.
Insertion remover. A metal sensor for detecting a printing plate made of metal is provided next to one of the plurality of suction means.
The partial suction means include a suction means located next to the metal sensor.
The interleaving paper removing device according to claim 2. The control means is characterized in that, in the third operation, the lowering is continued until the pressure sucked by the plurality of suction means becomes equal to or higher than a threshold value indicating that the interleaving paper is sucked.
The interleaving paper removing device according to any one of claims 1 to 3 . In the first operation, a part of the suction means among the plurality of suction means is one of the plurality of suction means.
The interleaving paper removing device according to any one of claims 1 to 4 . A plurality of suction means which are arranged above the slip sheet placed on the printing plate and can suck and suck the slip sheet, and are provided next to one of the plurality of suction means. It is a method of removing interleaving paper using an interleaving paper removing device equipped with a metal sensor for detecting a printing plate made of metal .
The plurality of adsorption means are lowered to the first position for adsorbing the interleaving paper, and the interleaving paper is attached to some of the adsorption means including the adsorption means located next to the metal sensor among the plurality of adsorption means. The first operation to adsorb and
A second operation of raising the plurality of suction means to a third position higher than the first position by a predetermined distance,
A third operation of lowering the plurality of suction means from the third position while causing the plurality of suction means to suck the slip sheet to suction means other than some of the suction means.
It is characterized by including a fourth operation of raising the plurality of suction means to a second position for causing the discharging means to discharge the interleaving paper and causing the discharging means to eject the interleaving paper.
How to remove the interleaving paper.

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