JP3705543B2 - Cylindrical outer surface scanning device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical outer surface scanning device, and more specifically, a cylindrical outer surface scanning in which a supplied printing plate is subjected to positioning processing in a punch unit, and then the printing plate is mounted on a recording drum and exposed by light beam scanning. The present invention relates to a mechanism for conveying a printing plate to the punch unit and recording drum in the apparatus.
[0002]
[Prior art]
A color print is produced through several steps such as an exposure step and a printing step. Prior to this exposure step, the color printed document image is separated into a plurality of colors, typically four colors Y (yellow), M (red), C (indigo) and K (black). Thus, image data for each color is generated. Such image data is given to the cylindrical outer surface scanning device used in the exposure process. A sheet-like printing plate such as a so-called PS plate (Presensitized Plate) is mounted on the outer surface of the recording drum provided in the cylindrical outer surface scanning device. The PS plate is a printing plate in which a photosensitive layer is applied in advance on a plate material such as an aluminum plate, a plastic sheet, or paper.
[0003]
In the exposure process, the cylindrical outer surface scanning device exposes the printing plate mounted on the outer surface of the recording drum based on the supplied image data, and thereby draws an image for each separated color on the printing plate. That is, when the original image is color-separated into YMCK, images of different colors are drawn on the four printing plates.
[0004]
A printing machine used in the printing process applies color ink corresponding to the exposed printing plate of each color and performs overprinting to produce a color printed matter. At this time, if the images of the respective colors are overprinted in a shifted state, a poor color printed matter is produced. In order to prevent such a shift, punch holes serving as a positioning reference at the time of printing are formed at predetermined positions of the printing plate. This punch hole serves as a reference when each image is exposed on the printing plate as well as at the time of printing. Therefore, the punch unit for forming the punch hole in the printing plate before exposure is usually a cylindrical outer surface scanning device. Prepared for. Thus, the cylindrical outer surface scanning device can draw an image of each color in the same area on each printing plate with the formed punch hole as a reference, and the printing machine uses the punch hole to make an image of each color. It is possible to produce a high-quality color print that has been overprinted in a uniform state.
[0005]
A conventional cylindrical outer surface scanning device as described above is disclosed in Japanese Patent Laid-Open No. 2000-56467. Hereinafter, among the conventional cylindrical outer surface scanning devices described in this publication, a part of the plate transport mechanism related to the present invention will be extracted and briefly described.
FIG. 19 is an exploded view showing a configuration of a conventional cylindrical outer surface scanning device. A conventional cylindrical outer surface scanning device is configured such that a storage / conveyance mechanism 2, a drive mechanism 3, a punch unit 4, a recording drum 5, and the like are attached to each part of a substantially rectangular parallelepiped frame 1. The drive mechanism 3 is not shown in FIG. 19 for the sake of clarity. FIG. 20 is a diagram showing the main part of the storage / conveyance mechanism 2 when the section AA ′ in FIG. 19 is viewed from the direction of the arrow B.
[0006]
19 and 20, the storage / transport mechanism 2 includes a fixed lower tray 22 and an upper tray 23, a rotatable feed roller 24, a loading transport roller 25 and an unloader sandwiched between two side plates 21. And a carrying roller 26 for loading. The two lower trays 22 and the upper tray 23 are vertically arranged and integrally formed by two side plates 21. The feed roller 24 is a roller for transporting the printing plate placed on the lower tray 22 in the direction of the transport roller 25. The transport rollers 25 are a set of two rollers, and are arranged so that the rollers come into contact with each other at a position close to the front end of the lower tray 22. The transport rollers 26 are a set of two rollers, and are arranged so that the rollers abut at a position close to the front end of the upper tray 23. The feed roller 24 and the transport roller 25 are connected to a motor M50 fixed to the side plate 21 by a belt (not shown), and rotate by receiving a driving force generated by the motor M50. Further, the transport roller 26 is connected to a motor M54 fixed to the side plate 21 by a belt (not shown), and rotates by receiving a driving force generated by the motor M54.
Further, small holes 27 and 28 are formed at predetermined positions of the lower tray 22 and the upper tray 23, and sensors PH50 and PH54 are fixed immediately below the small holes 27 and 28. The sensors PH50 and PH54 detect whether or not there is a printing plate directly above the small holes 27 and 28.
[0007]
The storage / conveyance mechanism 2 having the above configuration is fixed to the upper portion of the frame 1 as indicated by a dashed-dotted arrow α in FIG. However, the storage / conveyance mechanism 2 rotates within a predetermined range around a rotation shaft 29 protruding outward from the two side plates 21 (see arrow β in FIGS. 19 and 20).
The drive mechanism 3 realizes the rotation of the storage / conveyance mechanism 2. FIG. 21 is a diagram showing the drive mechanism 3 when viewed from the direction of the arrow C shown in FIG.
[0008]
In FIG. 21, the drive mechanism 3 includes two cam follower guides 31, a motor M55, a cam gear 32, and two cam followers 33, and further includes at least one sensor detection plate 34 and sensors PH55 and PH56.
Each cam follower guide 31 has a rectangular parallelepiped outer shape, and an oblong through hole is formed in the rectangular parallelepiped. Each cam follower guide 31 is fixed to each side plate 21 one by one so that both through holes face each other via the storage / conveyance mechanism 2. The motors M55 are disposed in the vicinity of the side plates 21 and are fixed to the frame 1 so as to face each other via the storage / conveyance mechanism 2. Each cam gear 32 is fixed to the frame 1 so as to face each side plate 21. However, each cam gear 32 receives the driving force generated by each motor M55 and rotates about its own axis. Each cam follower 33 is fixed to the outer edge of one surface (the surface facing the side plate 21) of each cam gear 32, and moves circularly about the axis of the cam gear 32. Each cam follower 33 has a disk shape having substantially the same diameter as the vertical width of the through hole of the cam follower guide 31 and is inserted into the through hole. Thereby, each cam follower guide 31 and each cam gear 32 are connected by each cam follower 33, and as a result, the storage / conveyance mechanism 2 is supported by the drive mechanism 3. The disk-shaped sensor detection plate 34 is arranged so as to be concentric with one cam gear 32, and rotates together with the cam gear 32. A single slit 35 is formed on the outer periphery of the sensor detection plate 34. The sensors PH55 and PH56 are fixed to the frame 1 so that the slit 35 formed in the rotating sensor detection plate 34 can be detected.
With the configuration as described above, the drive mechanism 3 moves and stops the storage / conveyance mechanism 2 to the lower position or the upper position by detecting the slits 35 of the sensor detection plate 34 that are moved by rotation by the sensors PH55 and PH56, respectively. Let
[0009]
Next, the punch unit 4 shown in FIG. 19 will be described. FIG. 22 is a view showing the punch unit 4 when the EE ′ cross section of FIG. 19 is viewed from the direction of the arrow F.
First, in FIG. 19, the punch unit 4 includes at least two punchers 41 and a mounting member 42. As shown in FIG. 22, each puncher 41 generally includes a main body 43, a sensor PH 62, a motor M 60, and a punch 44. A gap 45 is formed in the main body 43, and a printing plate conveyed through a first supply pass line (described later) is inserted into the gap 45. The sensor PH62 detects whether or not a printing plate has been inserted into the gap 45. The motor M60 generates a driving force when the sensor PH62 detects a printing plate. This driving force is converted into a force for moving the punch 44 up and down by a cam mechanism (not shown) inside the main body. The punch 44 moves up and down in response to the force transmitted from the cam mechanism, and punches the printing plate placed in the gap 45. Thereby, a punch hole and / or a notch is formed at one end of the printing plate. The mounting member 42 has a rectangular parallelepiped outer shape, and a groove 46 is formed along the longitudinal direction thereof. Each puncher 41 is attached to the groove 46. The punch unit 4 described above is fixed on the frame 1 as indicated by a dashed line arrow δ in FIG.
[0010]
Next, the recording drum 5 shown in FIG. 19 will be described. FIG. 23 is a diagram showing the recording drum 5 and its periphery when the section GG ′ of FIG. 19 is viewed from the direction of the arrow H. 19 and 23, the recording drum 5 is disposed in the frame 1 at a position obliquely below the storage / conveying mechanism 2 and the punch unit 4. The recording drum 5 has a substantially cylindrical shape, receives a driving force generated by the motor M1, and rotates about the axis of the cylinder. On the outer surface (annular surface) of the recording drum 5, a printing plate P (see a hatched portion in FIG. 19) conveyed through a second supply pass line (described later) is wound and mounted.
The cylindrical outer surface scanning device includes at least two positioning pins 51, a front end clamp 52, and a rear end clamp 53 as a configuration for fixing the printing plate P on the outer surface of the recording drum 5. As shown in FIG. 19, these positioning pins 51 are fixed on the outer surface of the recording drum 5 so as to be arranged in parallel to the central axis of the recording drum 5, and are conveyed through the second supply pass line. It is configured so that one end of the coming printing plate can be clamped.
[0011]
Next, a series of operations performed by the above-described configurations will be specifically described with reference to FIGS.
The printing plate P is supplied to the lower tray 22 of the storage / conveyance mechanism 2 (FIG. 24). The plate P is supplied manually by an operator, or is automatically supplied by an automatic plate supply mechanism (not shown) additionally attached to the cylindrical outer surface scanning device. When the storing / conveying mechanism 2 detects that the printing plate P is supplied by the sensor PH50, the storing / conveying mechanism 2 moves the lower tray 22 to the upper position in order to perform the punching process. Thereby, the conveyance roller 25 of the storage / conveyance mechanism 2 and the gap 45 between the punch units 4 are arranged in a straight line, and a first supply pass line as shown by the two-dot chain line arrow η is formed between them. (FIG. 25). Next, the feed roller 24 and the conveyance roller 25 rotate (forward rotation) in a direction (see arrow θ) for supplying the printing plate P from the storage / conveyance mechanism 2 to the punch unit 4. As a result, the printing plate P is conveyed on the surface of the lower tray 22 and sent out onto the first supply pass line (FIG. 26). The position of the sent printing plate with respect to each puncher 41 is adjusted by a centering mechanism (not shown) in the middle of the first supply pass line. At this time, the centering mechanism preferably performs position adjustment so that two punch holes and / or notches are formed at equal distances from the left and right ends of the printing plate P. The plate P whose position has been adjusted is eventually introduced into the gap 45 of each puncher 41.
[0012]
The punch unit 4 detects that one end of the printing plate P has reached by the sensor PH62 of each puncher 41, and forms a punch hole and / or a notch at a predetermined position of the printing plate P. Note that the shape and pitch of each notch coincide with the outer shape and pitch of the positioning pins 51 fixedly mounted on the recording drum 5. On the other hand, the shape and pitch of each punch hole coincide with the pin shape and pitch of a printing machine (not shown) used in the printing process.
[0013]
When punching is completed, the feed roller 24 and the transport roller 25 rotate (negatively rotate) at a substantially constant speed in the direction from the punch unit 4 to the storage / transport mechanism 2 (see arrow ι), and the punched printing plate P is removed. The first supply pass line is moved backward and re-stored in the lower tray 22 (FIG. 27). When the punched printing plate P is re-stored, the storage / conveyance mechanism 2 moves the lower tray 22 to the lower position so as to face the recording drum 5 (a straight line extending from the conveyance roller 25 contacts the outer surface). (FIG. 28). As a result, a second supply pass line is formed between the transport roller 25 and the recording drum 5. Next, the feed roller 24 and the transport roller 25 rotate forward to feed the punched printing plate P from the lower tray 22 onto the second supply path line toward the recording drum 5 (see arrow λ). The fed printing plate P is positioned with respect to the recording drum 5 by the notch formed at one end thereof being inserted into the positioning pin 51.
Thereafter, in a first clamp drive (not shown), the front end clamp 52 is driven to clamp one end of the printing plate P. Thereafter, the recording drum 5 rotates (forward rotation) in the direction indicated by the arrow μ in FIG. As a result, the printing plate P is wound around the outer surface of the recording drum 5 while being discharged from the lower tray 22 (FIG. 30).
[0014]
When the exposure process for the printing plate P is completed, unloading of the exposed printing plate P mounted on the recording drum 5 is executed as follows.
The recording drum 5 rotates in the reverse direction (negative rotation), and sends the printing plate P to the unloading conveyance roller 26 that is a discharge path line (two-dot chain line ρ in FIG. 31). The transport roller 26 rotates in a direction indicated by an arrow τ in FIG. 32, that is, a direction in which the printing plate P transported on the discharge path line can be stored in the upper tray 23. As a result, the printing plate P is stored in the upper tray 23 (FIG. 32).
[0015]
[Problems to be solved by the invention]
However, in the conventional cylindrical outer surface scanning device, the transport of the printing plate P to the punch unit 4 and the recording drum 5 depends only on the transport force of the feed roller 24 and the transport roller 25.
For this reason, the printing plate is transported to a predetermined position of the puncher 41 (specifically, hitting the back of the gap 45) due to a decrease in transport force caused by dirt or the like of the feed roller 24 and the transport roller 25. Therefore, there has been a problem that punch holes and / or notches are formed without accurate positioning. Each puncher 41 is provided with a sensor PH62. This sensor PH62 is used to determine whether or not the printing plate P has been inserted into the gap 45, and whether or not accurate positioning has been performed. It cannot be detected.
Similarly, there is a problem in that the notch portion of the printing plate is not conveyed until it hits the positioning pin 51 of the recording drum 5, and is clamped without being positioned accurately, and exposure processing is performed.
[0016]
Therefore, an object of the present invention is to convey the printing plate using an auxiliary conveyance mechanism in addition to the conventional conveyance mechanism using rollers, so that the punch hole and / or the cutting plate are accurately positioned. It is an object of the present invention to provide a cylindrical outer surface scanning device capable of notching processing and clamping to a recording drum.
[0017]
[Means for Solving the Problems and Effects of the Invention]
A first invention is a cylindrical outer surface scanning device including an exposure unit that mounts a printing plate on a recording drum to perform scanning exposure processing, and a transport unit that transports a supplied printing plate to the exposure unit.
The transport unit is
A tray on which the supplied printing plate is placed;
A forward-reverse rotatable transport roller disposed so that the roller contacts at a position close to the front of the tray (forward direction of the printing plate);
The front end protrudes from the upper surface of the tray, and is tiltable with respect to the transport direction so that it can be tilted forward and backward in the transport direction of the printing plate and movable in the forward and reverse directions of the transport of the printing plate. A pair of left and right movable pins,
When the printing plate is conveyed to the exposure unit, the printing plate is sent out by the conveying force generated by the forward rotation of the conveying roller, and the rear end portion of the printing plate is pushed forward by the movable pin.
[0018]
The second invention is an invention subordinate to the first invention, and is characterized in that the movable pin is automatically stored in the tray at a predetermined position .
[0019]
As described above, according to the first and second aspects of the invention, since the rear end portion of the printing plate is pushed using the movable pin, the clamping process to the recording drum in a state where the positioning is accurately performed is performed. It becomes possible. Further, when the printing plate is supplied from the rear of the movable pin (the reverse side of the printing plate conveyance), for example, even when the printing plate is automatically supplied by an automatic printing plate supply mechanism or the like, The printing plate can be placed on a tray.
[0020]
The third invention is an invention subordinate to either the first invention or the second invention,
The tray
A pair of rollers that can rotate forward and reverse at the same speed as the transport rollers;
A conveyor belt hung on a pair of rollers,
The loaded printing plate is sent to the conveyance roller by the movement of the conveyance belt driven by the normal rotation of the pair of rollers.
[0021]
As described above, according to the third invention, since the tray to which the printing plate is supplied has the transport belt structure, it is possible to use printing plates of various sizes.
[0022]
According to a fourth aspect of the present invention, there is provided an exposure unit that mounts the printing plate on a recording drum to perform scanning exposure processing, a transport unit that conveys the supplied printing plate to the exposure unit, and punch holes and / or cuts to the printing plate. A cylindrical outer surface scanning device comprising a punch unit that forms a notch,
The transport unit is
A tray on which a supplied printing plate is placed;
A forward-reverse rotatable transport roller disposed so that the roller contacts at a position close to the front of the tray (forward direction of the printing plate);
The front end protrudes from the upper surface of the tray, and is tiltable with respect to the transport direction so that it can be tilted forward and backward in the transport direction of the printing plate and movable in the forward and reverse directions of the transport of the printing plate. A pair of left and right movable pins,
When conveying the printing plate to the punch unit, the printing plate is sent out by the conveying force generated by the forward rotation of the conveying roller, and the rear end portion of the printing plate is pushed by the movable pin. .
[0023]
As described above , according to the fourth aspect of the invention, not only accurate positioning can be performed when supplying the printing plate to the recording drum, but also accurate positioning can be performed when supplying the printing plate to the punch unit. Yes. Therefore, it is possible to perform punching and / or notch processing in a state where accurate positioning is performed .
[0024]
According to a fifth aspect of the present invention, there is provided an exposure unit for mounting a printing plate on a recording drum provided with a positioning pin for inserting a notch formed at one end of the printing plate and performing scanning exposure processing, and a supplied printing plate A cylindrical outer surface scanning device comprising a transport unit for transporting the exposure unit to the exposure unit,
The transport unit is
A tray on which a supplied printing plate is placed;
A pair of upper and lower transport rollers capable of rotating in the forward and reverse directions, arranged so that the rollers come into contact with each other at a position close to the front of the tray (forward conveyance direction side of the printing plate);
A motor for vertically moving the upper roller of the pair of upper and lower conveying rollers;
A pair of left and right movable pins provided perpendicular to the transport direction so that the front end protrudes from the upper surface of the tray and is movable in the forward and reverse directions of the printing plate;
When the printing plate is conveyed to the exposure unit, the printing plate is sent out by the conveying force generated by the forward rotation of the conveying roller, and when one end of the printing plate reaches the position just before the positioning pin, a pair of upper and lower conveying rollers are driven by a motor. The upper roller of the plate is moved upward, and then the rear end portion of the printing plate is pushed forward by the movable pin .
[0025]
As described above, according to the fifth aspect of the invention, the positioning of the printing plate on the recording drum in the exposure process can be accurately performed by the operation of the movable pin.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a cylindrical outer surface scanning apparatus using a new storage / conveyance mechanism 102 in place of the storage / conveyance mechanism 2 used in the above-described conventional cylindrical outer surface scanning apparatus. Therefore, in the following embodiment, the new storage / conveyance mechanism 102 which is a different part will be mainly described.
[0027]
(First embodiment)
1 and 2 are views for explaining a storage / conveyance mechanism 102 used in the cylindrical outer surface scanning device according to the first embodiment of the present invention. FIG. 1 is a schematic cross-sectional view of the storage / transport mechanism 102 along the plate transport direction. 2 is a schematic view of the storage / conveyance mechanism 102 as viewed from the broken line ZZ ′ shown in FIG.
[0028]
1 and 2, the storage / conveyance mechanism 102 includes a fixed lower tray 122 and an upper tray 123, rotatable loading conveyance rollers 124 and 125, an unloading conveyance roller 127, and an auxiliary conveyance device 126. And. These configurations are sandwiched between two side plates 121. The lower tray 122 is supplementarily disposed for the purpose of connecting the transport roller 124 and the transport roller 125 to the punch unit 4. The auxiliary transporter 126 is a mechanism for transporting the placed printing plate in the direction of the transport roller 125. The conveyance rollers 125 are a set of two rollers, and are arranged so that the rollers abut at a position close to the tip of the auxiliary conveyance device 126. The transport rollers 127 are a set of two rollers, and are arranged so that the rollers come into contact with each other at a position close to the front end of the upper tray 123. The transport rollers 124 and 125 are connected to a motor M150 fixed to the side plate 121 by a gear (not shown), and rotate by receiving a driving force generated by the motor M150. Further, the upper roller of the transport rollers 125 can be moved up and down by the driving force of the motor M152, thereby sandwiching the printing plate with an appropriate force. On the other hand, the transport roller 127 is connected to a motor M154 fixed to the side plate 121 by a gear (not shown), and rotates by receiving a driving force generated by the motor M154. The upper roller of the transport rollers 127 can be moved up and down by the driving force of the motor M151, thereby sandwiching the printing plate with an appropriate force.
Small holes 128 and 129 are formed at predetermined positions of the lower tray 122 and the upper tray 123, and sensors PH150 and PH154 are fixed immediately below the small holes 128 and 129. The sensors PH150 and PH154 detect whether or not there is a printing plate immediately above the small holes 128 and 129.
[0029]
The auxiliary conveyor 126 includes a plurality of conveyor belts 111, a pair of rollers 112 for belt feeding, two movable pins 113, a belt 114 for driving movable pins, and a pair of pulleys 115 for feeding movable pins, A motor M158 and sensors PH158 and PH159 are included.
The plurality of conveyor belts 111 are hung on a pair of rollers 112 for belt feeding so as not to interfere with each other. In the example shown in FIG. 2, eight conveyor belts 111 are used. One roller of the pair of rollers 112 is connected to a motor M150 used for driving the above-described transport rollers 124 and 125 by a gear (not shown), and receives a driving force generated by the motor M150. Rotate. Accordingly, the transport rollers 124 and 125 and the transport belt 111 rotate at the same speed. The two movable pins 113 are fixed to the belt 114 for driving the movable pins in parallel to the direction perpendicular to the conveyance direction so that the tip protrudes from between the conveyance belts 111. The two movable pins 113 are arranged in a centered manner in a direction orthogonal to the conveying direction of the printing plate P. Further, the distance between the two movable pins 113 is arranged to be narrower than the distance between the two punchers 41 in the punch unit 4 described above. Thereby, when the movable pin 113 pushes out the rear end portion of the printing plate P, the printing plate P can be reliably abutted into the gap 45 of the puncher 41. The belt 114 for driving the movable pin is hung on a pair of pulleys 115 for feeding the movable pin. One roller of the pair of pulleys 115 is connected to a motor M158 by a belt (not shown), and rotates by receiving a driving force generated by the motor M158. Accordingly, the two movable pins 113 move in the forward / reverse direction of the plate transport on the auxiliary transporter 126 in accordance with the driving of the motor M158.
A sensor PH159 is fixed to a predetermined portion of the movable pin driving belt 114, and detects whether or not there is a printing plate between the conveyor belts 111. Therefore, the sensor PH159 moves on the auxiliary transporter 126 in the forward / reverse direction of the printing plate according to the driving of the motor M158 together with the two movable pins 113. Further, a sensor PH158 is fixed at a predetermined position of the auxiliary transporter 126, and it is detected whether or not the movable pin 113 is at a predetermined position (origin position).
[0030]
Next, a series of plate storing / conveying operations performed by the above-described configurations will be described in detail with reference to FIGS.
The movable pin 113 in the initial state is at the origin position (the farthest end from the punch unit 4 side) as shown in FIG. The plate P is supplied to the direction of the punch unit 4 (hereinafter referred to as a positive direction) when viewed from the movable pin 113. The plate P is supplied manually by an operator, or is automatically supplied by an automatic plate supply mechanism (not shown) additionally attached to the cylindrical outer surface scanning device. When the printing plate P is supplied from the rear of the movable pin 113 (the right side in FIG. 3), the movable pin 113 may be configured to be tiltable in the forward direction (FIG. 4). Further, when the movable pin 113 is configured to be tiltable, it is more preferable that a guide or the like is provided so that the movable pin 113 can be automatically stored (below the upper surface of the transport belt 111) at the origin position.
[0031]
When the sensor PH159 of the auxiliary transporter 126 detects that the printing plate P has been supplied, the upper roller of the transporting roller 125 is lowered, and the transporting rollers 124, 125 and the transporting belt 111 cause the printing plate P to move in the forward direction. Rotation (hereinafter referred to as forward rotation) is started so as to be conveyed (FIG. 5). As a result, the printing plate P is conveyed on the surface of the lower tray 122 and sent out toward the punch unit 4. When the printing plate P is conveyed and deviates from the detection range of the sensor PH159, the movable pin driving belt 114 is conveyed so that the movable pin 113 moves following the rear end portion of the printing plate P at a certain distance. Forward rotation is started at the same speed as the belt 111 (FIG. 6).
When the printing plate P is conveyed and reaches a predetermined position just before the punch unit 4, the upper roller of the conveying roller 125 is raised (FIG. 7). Thereafter, the printing plate P is transported only by the transporting force of the transporting roller 124, the lower roller of the transporting roller 125 and the transporting belt 111 until the leading end reaches the punch unit 4. When the leading end portion of the printing plate P reaches the punch unit 4, the movable pin 113 that has been operated to push out the trailing end portion of the printing plate P, and attaches the leading end portion of the printing plate P to the punch unit 4. Hit it (Figure 8). By the operation of the movable pin 113, the printing plate P can be accurately positioned in the punch hole and / or notch forming process.
[0032]
When punching at an accurate position is completed in the punch unit 4, the movable pin 113 moves in the direction opposite to the punch unit 4 (hereinafter referred to as the reverse direction) (FIG. 9). When the movable pin 113 leaves a certain distance from the rear end portion of the printing plate P, the upper roller of the conveying roller 125 is lowered, and the conveying rollers 124 and 125 and the conveying belt 111 convey the printing plate P in the reverse direction. Rotation (hereinafter referred to as reverse rotation) is started (FIG. 10). As a result, the punched printing plate P is re-contained on the lower tray 122.
[0033]
When the punched printing plate P is re-stored, the storage / conveyance mechanism 102 moves the lower tray 122 to the lower position so as to face the recording drum 5 (a straight line extending from the lower tray 122 contacts the outer surface). (FIG. 11). Next, the transport rollers 124 and 125 and the transport belt 111 rotate forward to send the punched printing plate P from the lower tray 122 to the recording drum 5 (FIG. 12). When the printing plate P is conveyed and reaches a predetermined position just before the positioning pin 51, the upper roller of the conveying roller 125 is raised (FIG. 13). Thereafter, the printing plate P is transported only by the transporting force of the transporting roller 124, the lower roller of the transporting roller 125, and the transporting belt 111 until the tip portion reaches the positioning pin 51. Then, when the leading end portion of the printing plate P reaches the positioning pin 51, the movable pin 113 which has been separated pushes out the trailing end portion of the printing plate P and abuts the leading end portion of the printing plate P on the positioning pin 51 (FIG. 14). ). By the operation of the movable pin 113, the positioning of the printing plate P on the recording drum 5 in the exposure process can be accurately performed.
When the conveyance of the printing plate P to the recording drum 5 is completed, the movable pin 113 moves in the reverse direction and returns to the origin position (FIG. 15).
Note that the unloading process of the printing plate P after the exposure process is the same as the procedure described above.
[0034]
As described above, according to the storage / conveyance mechanism 102 used in the cylindrical outer surface scanning device according to the first embodiment of the present invention, the movable plate 113 is used to push the rear end portion of the printing plate P. In addition, punch hole and / or notch formation processing and clamping processing to the recording drum can be performed in a state where accurate positioning is performed.
The movable pin 113 that can be used in the present invention is not limited to the cylindrical shape exemplified in the present embodiment, and may have other various shapes (such as a prismatic shape or a conical shape).
[0035]
(Second Embodiment)
In the conventional cylindrical outer surface scanning device described above, the printing plate supply mechanism and the printing plate collection mechanism of the storage / conveyance mechanism 2 are configured separately, so that the position of the recording drum 5 when the printing plate is supplied, and the printing The position of the recording drum 5 when collecting the plate is different. Therefore, in the conventional cylindrical outer surface scanning device, it is necessary to rotationally control the position of the recording drum 5 every time the plate supply process is started, and the throughput of the exposure process is poor.
Therefore, in the second embodiment, a storage / conveying mechanism that improves the throughput of exposure processing by sharing a part of the printing plate supply mechanism and the printing plate collection mechanism will be described.
[0036]
FIG. 16 is a schematic cross-sectional view along the plate transport direction of the storage / transport mechanism 202 used in the cylindrical outer surface scanning device according to the second embodiment of the present invention. As shown in FIG. 16, the storage / transport mechanism 202 according to the second embodiment further includes a path switching movable guide 130 and a motor M <b> 172 with respect to the storage / transport mechanism 102 of the first embodiment. 1 and FIG. 16 perform the same operation, and thus the description thereof is omitted here.
The transport rollers 127 are a set of two rollers, and are arranged so that the rollers abut at a position close to the front end of the upper tray 123 and a position close to the front end of the path switching movable guide 130. The path switching movable guide 130 can be moved up and down by the driving force of the motor M172.
[0037]
A series of plate storing / conveying operations performed by this configuration will be specifically described with reference to FIGS.
The storage / conveyance mechanism 202 drives the motor M172 to move the path switching movable guide 130 during the conveyance processing of the printing plate P to the recording drum 5 (FIGS. 3 to 15) described in the first embodiment. To form a plate supply line (FIG. 17). When the exposure process of the printing plate P is completed, the recording drum 5 stops at the same position as the position where the printing plate P is supplied. At the same time, the storage / conveyance mechanism 202 drives the motor M172 to lower the path switching movable guide 130 to form a printing plate collection line (FIG. 18). The printing plate P delivered from the recording drum 5 is guided to the transport roller 127 along the lower tray 122 and the path switching movable guide 130 and is collected and stored in the upper tray 123.
It should be noted that a sensor for detecting a guide distortion is provided so that the printing plate P is correctly guided to the conveying roller 127 along the path switching movable guide 130 to control the vertical movement of the path switching movable guide 130. Good.
[0038]
As described above, according to the storage / conveyance mechanism 202 used in the cylindrical outer surface scanning device according to the second embodiment of the present invention, the printing plate P is used at the same stop position of the recording drum 5 using the path switching movable guide 130. Can be supplied / recovered. Thereby, the throughput of exposure processing can be improved.
In the first and second embodiments described above, the transport belt 111 is disposed in a direction orthogonal to the transport direction of the printing plate P. However, the transport belt 111 is transported by reducing the outer transport belt 111. The printing plate P may be transported only in the vicinity of the center position in the direction orthogonal to the direction. A flat plate such as the lower tray 122 is disposed at the reduced position of the conveyor belt 111. In this way, when the printing plate P is centered, the lateral ends of the printing plate P do not interfere with the transport belt 111, so that the printing plate P can be centered reliably.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view along the plate transport direction of a storage / transport mechanism 102 used in a cylindrical outer surface scanning device according to a first embodiment of the present invention.
2 is a schematic view of the storage / conveyance mechanism 102 according to the first embodiment as viewed from the broken line ZZ ′ shown in FIG. 1;
FIG. 3 is a diagram illustrating a storing / transporting operation of a printing plate P by a storing / transporting mechanism.
FIG. 4 is a diagram for explaining a storing / conveying operation of a printing plate P by a storing / conveying mechanism.
FIG. 5 is a diagram for explaining a storing / conveying operation of the printing plate P by the storing / conveying mechanism 102;
FIG. 6 is a diagram illustrating a storing / conveying operation of the printing plate P by the storing / conveying mechanism 102;
FIG. 7 is a diagram for explaining a storing / conveying operation of the printing plate P by the storing / conveying mechanism 102;
FIG. 8 is a diagram for explaining a storing / conveying operation of the printing plate P by the storing / conveying mechanism 102;
FIG. 9 is a diagram for explaining a storing / conveying operation of the printing plate P by the storing / conveying mechanism 102;
FIG. 10 is a diagram for explaining a storing / conveying operation of the printing plate P by the storing / conveying mechanism 102;
FIG. 11 is a diagram for explaining a storing / conveying operation of the printing plate P by the storing / conveying mechanism 102;
FIG. 12 is a view for explaining the storing / transporting operation of the printing plate P by the storing / transporting mechanism 102;
FIG. 13 is a diagram for explaining a storing / conveying operation of the printing plate P by the storing / conveying mechanism.
FIG. 14 is a view for explaining the storing / transporting operation of the printing plate P by the storing / transporting mechanism 102;
FIG. 15 is a view for explaining the storing / transporting operation of the printing plate P by the storing / transporting mechanism;
FIG. 16 is a schematic cross-sectional view of the storage / conveyance mechanism 202 used in the cylindrical outer surface scanning apparatus according to the first embodiment of the present invention along the plate conveyance direction.
FIG. 17 is a view for explaining the storing / transporting operation of the printing plate P by the storing / transporting mechanism 202;
18 is a view for explaining the storing / transporting operation of the printing plate P by the storing / conveying mechanism 202. FIG.
FIG. 19 is an exploded view showing a configuration of a conventional cylindrical outer surface scanning device.
20 is a cross-sectional view taken along line AA ′ of the storage / conveyance mechanism 2 when FIG. 19 is viewed from the direction of arrow B. FIG.
FIG. 21 is a diagram showing the drive mechanism 3 when FIG. 19 is viewed from the direction of arrow C;
22 is an EE ′ sectional view of the punch unit 4 when FIG. 19 is viewed from the direction of arrow F. FIG.
23 is a GG ′ cross-sectional view of the recording drum 5 and its surroundings when FIG. 19 is viewed from the direction of the arrow H. FIG.
FIG. 24 is a diagram illustrating a storing / conveying operation of a printing plate P by a conventional storing / conveying mechanism 2;
FIG. 25 is a diagram for explaining a storing / conveying operation of a printing plate P by a conventional storing / conveying mechanism 2;
FIG. 26 is a diagram illustrating a storing / conveying operation of a printing plate P by a conventional storing / conveying mechanism 2;
FIG. 27 is a view for explaining the storing / transporting operation of the printing plate P by the conventional storing / transporting mechanism 2;
FIG. 28 is a view for explaining the storing / transporting operation of the printing plate P by the conventional storing / transporting mechanism 2;
FIG. 29 is a diagram for explaining the storing / conveying operation of the printing plate P by the conventional storing / conveying mechanism 2;
FIG. 30 is a diagram illustrating a storing / transporting operation of a printing plate P by a conventional storing / transporting mechanism 2;
FIG. 31 is a diagram for explaining a storing / conveying operation of a printing plate P by a conventional storing / conveying mechanism 2;
FIG. 32 is a view for explaining the storing / transporting operation of the printing plate P by the conventional storing / transporting mechanism 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Frame 2, 102, 202 ... Storage / conveyance mechanism 3 ... Drive mechanism 4 ... Punch unit 5 ... Recording drum 21, 121 ... Side plate 22, 23, 122, 123 ... Tray 24 ... Feed rollers 25, 26, 124, 125 , 127 ... conveying rollers 27, 28, 128, 129 ... small hole 29 ... rotating shaft 31 ... cam follower guide 32 ... cam gear 33 ... cam follower 34 ... sensor detection plate 35 ... slit 41 ... puncher 42 ... mounting member 43 ... main body 44 ... Punch 45 ... Gap 46 ... Groove 51 ... Positioning pins 52, 53 ... Clamp 111 ... Conveying belt 112 ... Roller 113 ... Movable pin 114 ... Belt 115 for moving pin driving ... Pulley 126 ... Auxiliary conveyer 130 ... Path switching movable guide M1 , M50, M54, M55, M60, M150 to M152, M154, M158, 172 ... motor P ... plate PH50, PH54~PH56, PH62, PH150, PH154, PH158, PH159 ... sensor

Claims (5)

A cylindrical outer surface scanning device including an exposure unit that mounts a printing plate on a recording drum to perform scanning exposure processing, and a transport unit that transports a supplied printing plate to the exposure unit,
The transport unit is
A tray on which the supplied printing plate is placed;
A forward-reversely rotatable transport roller disposed so that the roller abuts at a position close to the front of the tray (forward direction of the printing plate);
The front end protrudes from the upper surface of the tray, can be tilted toward the forward plate conveyance direction, and can be moved in the forward / reverse direction of the printing plate so as to be perpendicular to the conveyance direction. A pair of left and right movable pins
A cylindrical plate characterized in that when the printing plate is conveyed to the exposure unit, the printing plate is sent out by a conveying force generated by the forward rotation of the conveying roller, and the rear end portion of the printing plate is pushed forward by the movable pin. External scanning device. The cylindrical outer surface scanning device according to claim 1, wherein the movable pin is automatically stored in the tray at a predetermined position. The tray
A pair of rollers capable of forward and reverse rotation at the same speed as the conveying rollers;
A conveyance belt suspended on the pair of rollers,
3. The cylinder according to claim 1, wherein the loaded printing plate is sent to the transport roller by the movement of the transport belt driven by the forward rotation of the pair of rollers. External scanning device. An exposure unit that mounts a printing plate on a recording drum to perform scanning exposure processing, a conveyance unit that conveys the supplied printing plate to the exposure unit, and a punch unit that forms punch holes and / or notches in the printing plate A cylindrical outer surface scanning device comprising:
The transport unit is
A tray on which the supplied printing plate is placed;
A forward-reversely rotatable transport roller disposed so that the roller abuts at a position close to the front of the tray (forward direction of the printing plate);
The front end protrudes from the upper surface of the tray, and is tiltable with respect to the transport direction so that it can be tilted forward and backward in the transport direction of the printing plate and can be moved in the forward and reverse direction of the transport of the printing plate. A pair of left and right movable pins
When conveying the printing plate to the punch unit, the printing plate is sent out by the conveying force generated by the forward rotation of the conveying roller, and the rear end portion of the printing plate is pushed by the movable pin. A cylindrical outer surface scanning device. An exposure unit for performing scanning exposure processing by mounting the printing plate on a recording drum provided with a positioning pin for inserting a notch formed at one end of the printing plate, and transporting the supplied printing plate to the exposure unit A cylindrical outer surface scanning device comprising a transport unit,
The transport unit is
A tray on which the supplied printing plate is placed;
A pair of upper and lower transport rollers capable of rotating in the forward and reverse directions, arranged so that the rollers come into contact with each other at a position close to the front of the tray (the transporting direction side of the printing plate);
A motor for moving the upper roller of the pair of upper and lower transport rollers up and down;
A pair of left and right movable pins provided perpendicular to the transport direction so that the front end protrudes from the upper surface of the tray and is movable in the forward and reverse directions of the printing plate;
When transporting the printing plate to the exposure unit, the printing plate is sent out by the transport force generated by the forward rotation of the transport roller, and when the one end of the printing plate reaches the position just before the positioning pin, the motor A cylindrical outer surface scanning device characterized in that an upper roller of a pair of upper and lower conveying rollers is moved upward, and then a rear end portion of a printing plate is pushed forward by the movable pin.

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