JP2003165017A - Metal plate machining device and metal plate machining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal plate machining device and a metal plate machining method capable of effectively preventing wavy deformation of a cut part when a strip metal plate is cut or trimmed. <P>SOLUTION: This metal plate machining device has a pair of rotating blades for cutting widthwise edges of the continuous strip metal plate running in a constant direction, and the rotation axis of the rotating blades has an angle with respect to the running direction of the metal plate so that the cutting edges of the rotating blades and a cut part of the metal plate open toward the downstream side of the running direction of the metal plate. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal plate processing apparatus and a metal plate processing method, and more particularly to a metal plate processing apparatus and a metal plate processing apparatus which can effectively prevent the trimming surface from waviness when a thin metal plate is trimmed. Regarding the method.

[0002]

2. Description of the Related Art Generally, a PS plate is obtained by subjecting at least one surface of a continuous aluminum thin plate in a band shape to surface treatment such as graining, anodizing, and silicate treatment to obtain the surface of the aluminum support web. One or two or more plate-making layer forming liquids are applied to the treated surface and dried, and the PS plate stock having a photosensitive or heat-sensitive plate-making layer is cut into a predetermined size. It is manufactured by the procedure.

The PS plates manufactured by the above procedure are laminated by a predetermined number of sheets, then packed and shipped.

The PS plate original is usually cut by using a cutting machine having a rotary blade C shown in FIG.

As shown in FIG. 12, a rotary blade C has a disk-shaped upper blade A and a lower blade B which are arranged so as to partially overlap each other.
So as to move the upper blade A and the lower blade B from the upstream side to the downstream side with respect to the transport direction a of the PS plate raw material W in the portion where they overlap each other, as shown by arrows b and c. The PS plate original fabric W is rotated and cut in the thickness direction.

In FIG. 12, the position at the start of cutting in which the PS plate material W is caught between the upper blade A and the lower blade B, the upper blade A
Indicates the position where is most overlapped with the lower blade B, and the position at which the upper blade A is returned from the PS plate original web W and returns to the position before cutting by the position, the position, and the position, respectively.

The position is shown in FIG.
As shown in, the blade edge surface A1 of the upper blade A descends along the lower blade B to cut the web W. In position, FIG.
In (B), the blade tip surface A1 of the upper blade A descends to the lowest position and then starts to rise. Then, at the position, as shown in FIG. 13C, the cutting edge surface A1 rises along the lower blade B and returns to the position before cutting.

[0008]

However, at the position and the position, when the cutting edge surface A1 rises, the upper blade A
In, the blade tip end surface A3 that contributes to the cutting contacts the cutting portion W1 formed by cutting the PS plate original fabric W with the upper blade A.

Therefore, the cutting portion W1 and its vicinity are sometimes rolled up upward by the cutting edge tip surface A3 and deformed into a wavy shape.

According to the present invention, it is effective that the cut portion is deformed into a wavy shape when the strip-shaped metal plate such as the aluminum support web and the PS plate is cut or the side edge portion is trimmed. It is an object of the present invention to provide a metal plate processing apparatus and a metal plate processing method that can prevent it.

[0011]

According to a first aspect of the present invention, there is provided a rotary blade having a pair of rotary blades for cutting an end portion in a width direction of a continuous strip-shaped metal plate traveling in a constant direction. The rotary shaft of the rotary blade forms an angle with the running direction of the metal plate so that the cutting edge of the rotary blade and the cutting portion of the metal plate open toward the downstream side with respect to the running direction of the metal plate. And a metal plate processing apparatus.

In the metal plate processing apparatus, the rotary blade is a blade that returns to a position before cutting after cutting a widthwise end edge of the metal plate, in other words, a side edge portion along the longitudinal direction with a predetermined width. At the time of returning, since the cutting edge of the cutting blade does not come into contact with the cutting portion, the cutting portion of the metal plate and the vicinity thereof are not deformed in a wave shape.

Examples of the metal plate include the aluminum support web and the PS plate stock described above. The metal plate processing apparatus can also be used for ordinary surface-treated metal plates such as painted steel plate, surface-treated steel plate, and trimming of stainless steel plate.

According to a second aspect of the present invention, there is provided a carrying roller for carrying the metal plate along the traveling direction,
The present invention relates to a metal plate processing apparatus in which a rotary shaft of the rotary blade is arranged so as to form a constant angle with respect to an axis of the transport roller.

In the metal plate processing apparatus, by disposing the rotary blade so that the rotary shaft of the rotary blade forms a predetermined angle with respect to the traveling direction of the metal plate, the blade edge of the rotary blade is An opening extending in the downstream direction is formed between the metal plate and the cut portion.

Therefore, in the metal plate processing apparatus, it is possible to use an ordinary carrying roller for carrying the metal plate in a direction perpendicular to the axial direction.

According to a third aspect of the present invention, there is provided a carrying roller for carrying the metal plate, wherein the rotary shaft of the rotary blade is arranged in parallel with the axis of the carrying roller. The transport roller relates to a metal plate processing apparatus that skews the metal plate such that a blade edge of the rotary blade and a cutting portion of the metal plate open in a downstream direction with respect to a traveling direction of the metal plate.

In the metal plate processing apparatus, as the conveying roller, like the crown roller described in "2. Embodiment 2" in the section of "Embodiment of the invention",
The metal plate can be slanted by using a conveyance roller having a thick central portion and a diameter reduced toward both ends.

According to a fourth aspect of the present invention, the rotary shaft of the rotary blade faces the downstream side with respect to the traveling direction of the metal plate between the cutting edge of the rotary blade and the cutting portion of the metal plate. The present invention relates to a metal plate processing apparatus which is arranged so that the opening angle is in the range of 0.13 ° to 0.23 °.

The opening angle of 0.13 ° to 0.23 ° means that the cutting start point of the metal plate at the rotary blade is used as a reference point along the cutting portion at the downstream side.
It can be rephrased that the distance between the cutting portion and the virtual plane to which the blade tip of the rotary blade belongs is 2.5 to 4 mm at the point moved by 00 mm.

When the opening angle is within the above range, the blade tip of the rotary blade does not come into contact with the cutting portion when the blade is returned and the cutting portion is not deformed in a wavy shape, and when the metal plate is cut, No unreasonable force is applied to the rotary blade and the metal plate.

According to a fifth aspect of the present invention, the metal plate is
The present invention relates to a metal plate processing apparatus which is an aluminum support web which is obtained by roughening at least one surface of a strip-shaped continuous aluminum thin plate and is used as a base material of a lithographic printing plate.

The metal plate processing apparatus is an example in which the metal plate processing apparatus of the present invention is used for cutting and trimming an aluminum support web.

According to a sixth aspect of the present invention, the metal plate is
The present invention relates to a metal plate processing apparatus which is a lithographic printing plate having a plate-making layer formed on the roughened surface of the aluminum support web.

The metal plate processing apparatus is an example in which the metal plate processing apparatus of the present invention is used for cutting and trimming a PS plate original fabric.

According to a seventh aspect of the present invention, the rotary shaft is arranged in the running direction of the metal plate so that the blade edge and the cut portion of the metal plate open toward the downstream side in the running direction of the metal plate. The present invention relates to a metal plate processing method, characterized in that a pair of rotary blades arranged at an angle is used to cut a widthwise edge of a metal plate traveling in a fixed direction.

In the metal plate processing method, since the cutting edge of the cutting blade does not come into contact with the cutting portion when the cutting blade returns, the cutting portion of the metal plate and its vicinity are corrugated. There is nothing to do.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION 1. Embodiment 1 FIG. 1 shows an example of a processing line for manufacturing a PS plate by cutting the PS plate raw material into a predetermined size. Hereinafter, the PS plate stock is referred to as "web".

In the processing line shown in FIG. 1, the metal plate processing apparatus of the present invention is used. Note that FIG. 1 shows a state in which the web 12 is cut and processed on the processing line. The details of the configuration of the metal plate processing apparatus in the processing line are shown in FIG.

As shown in FIGS. 1 and 2, the processing line 9
On the most upstream side of 0, that is, on the side where the web 12 is sent out, in other words, on the upper right side in FIG. 1, a sending machine 14 for sequentially unwinding the web 12 which has been wound in a roll in advance is arranged. A leveler 15 is arranged on the downstream side, that is, in the direction in which the web 12 is delivered. Leveler 15
The feed roller 16 is disposed on the downstream side of the.

The web 12 is provided downstream of the feed roller 16.
A notcher 20 having a punched-out portion is provided on the lower side, and a cutting unit 21 is provided on the downstream side of the notcher 20. The cutting unit 21 includes a metal plate processing apparatus 10 that cuts the web 12 into a predetermined width and trims both side edges.

On the downstream side of the metal plate processing apparatus 10, a length measuring device 26, a running cutter 28, a conveyor 32, a stacking section 34,
And the transport unit 35 are sequentially arranged.

The web 12 delivered by the delivery device 14
Is curled in the leveler 15 and the feed roller 1
At 6, the sheet is electrostatically attached to the interleaving paper 18.

The web 12 to which the outer paper 18 is attached is
The notcher 20 is provided with a punching portion that guides a cutting roller portion 24 and a trimming portion 25, which will be described later, in the metal sheet processing apparatus 10 to a predetermined cutting position, and the metal sheet processing apparatus 10 cuts along the conveying direction.

The cutting scraps 86 produced by the cutting by the metal plate processing apparatus 10 are sent to a chopper (not shown) and finely cut, and then collected by a recovery conveyor 82 into a recovery box 84, and the interleaving paper 18 is Suction processing is performed by the suction pipe 23.

In this way, the web 12 cut into a predetermined width has its feed length detected by the length measuring device 26, and is cut along the width direction by the running cutter 28 at the instructed timing. As a result, the PS plate 3 of the set size
0 is produced.

Next, the PS plates 30 are sent to a stacking unit 34 by a conveyor 32 and stacked by a predetermined number, stacked on a pallet 33 via a transfer unit 35, and sent to a storage or a packaging process. In FIG. 1, 31 is P
1 shows a stack of stacked S plates 30 by a predetermined number.

The thickness of the web 12 cut on the processing line 90 is usually 0.15 to 0.4 mm, but is not particularly limited to the above range.

As shown in FIG. 2, the metal plate processing apparatus 10 includes a horizontally elongated square frame 10A provided so as to surround a conveyance surface T which is a conveyance path of the web 12, and a frame 10A.
A cutting roller portion 24 located at the center of the opening of the web 12 for cutting the web 12 into a predetermined width, and two trimming portions 25 located at both ends of the opening and trimming both side edges of the web 12. Have. In the metal plate processing apparatus 10, the transport surface T is a flat surface that extends in the horizontal direction. The width of the PS plate stock to be trimmed in the trimming section 25 can be appropriately determined according to the size of the PS plate to be manufactured, etc., but is usually set in the range of 4 to 200 mm.

The trimming section 25, as shown in FIG.
An upper blade 48, which is a rotary blade fixed to a rotary shaft 78 extending in parallel with the transport surface T above the transport surface T,
It has a lower blade 54 which is a rotary blade fixed to a rotary shaft 80 which is located on the opposite side of the rotary shaft 78 with the transport surface T sandwiched therebetween and which extends parallel to the rotary shaft 78. Rotating shaft 78 and rotating shaft 8
0 is a rail 44 provided on the lower frame of the frame body 10A.
A base 46 that is movable along a direction perpendicular to the transport direction of the web 12 extends toward the center of the opening in the frame 10A. Both the rotating shaft 78 and the rotating shaft 80 are rotated around the axis at the same speed in the transport direction by an appropriate driving means (not shown). Therefore,
The rotating shaft 78 and the rotating shaft 80 rotate in opposite directions. The upper blade 48 and the lower blade 54 correspond to the cutting blade or the rotary blade in the metal plate processing apparatus of the present invention.

As shown in FIGS. 2 to 5, the upper blade 48 is shaped like a dish having a conical outer peripheral surface whose outer diameter decreases toward the base 46, in other words, toward the outside. A part of the outer peripheral portion is formed on the large diameter side, and
Protruding downward from. A cutting edge surface 59 is formed on the large diameter side of the outer peripheral surface of the upper blade 48, that is, on the outer circumference of the large diameter side.

On the surface of the upper blade 48 on the large diameter side, the upper blade 4
8, a circular concave portion 58 is formed concentrically with the concave portion 58.
A groove-shaped concave portion 60 is formed on the peripheral edge portion of the. Therefore, when polishing the upper blade 48, it is sufficient to polish the outside of the concave portion 58 on the surface on the large diameter side, and therefore the labor required for polishing can be reduced. Further, since the concave portion 60 is formed, it is possible to prevent the blade surface 59 from being damaged by the polishing tool hitting the blade edge of the upper blade 48 when polishing the concave portion 58.

On the outside of the concave portion 58 on the large diameter side surface, an annular bulging allowance concave portion 62 that allows the cutting portion 12C of the web 12 to bulge toward the large diameter side surface of the upper blade 48. Are formed concentrically with the recess 58. The bulge allowance concave portion 62 corresponds to the bulge allowance portion in the metal plate processing apparatus of the present invention. The maximum depth of the bulge allowance recess 62 is
Usually, it is in the range of 0.1 mm to 0.5 mm, but it can be appropriately determined according to the cutting conditions. As shown in FIG.
The swelling allowance recess 62 has a cross-sectional shape that becomes deeper toward the peripheral edge.
It is not limited to this.

Between the outer periphery of the bulge-allowing recess 62 on the large-diameter surface of the upper blade 48 and the cutting edge surface 59, as shown in FIG. 4, the web extends from the bulge-allowing recess 62 to the cutting edge. A cutting edge tip surface 66 that contributes to the cutting of 12 is formed. The width of the blade tip surface 66, that is, the blade tip width L is 0.0.
It is 5 to 0.5 mm. When the tip edge width L is in the above range, the upper blade 48 hardly spills during cutting,
Moreover, it is possible to prevent the tip end surface 66 of the blade tip and the cutting portion 12C from coming into strong contact with each other when the blade is returned, and thus the cutting portion 12C is distorted or the surface of the web 12 is bent.

A concave portion 58 on the large-diameter surface of the upper blade 48
And the swelling allowance concave portion 62, a flat offset surface 6 offset by a depth C1 from the tip end surface 66 of the cutting edge.
4 are formed. The offset depth C1 is usually
Although it is in the range of 0.05 to 0.30 mm, it can be appropriately determined according to the cutting conditions.

The tip end width L of the upper blade 48 is
The range of 0.05 to 0.5 mm is preferable, but the range is not limited.

As shown in FIG. 2, a pressing roller 22 is integrally provided on the surface of the upper blade 48 near the center of the frame 10A. The pressing roller 22 is rotatably provided on the rotating shaft 78.

In the pressing roller 22, the outer peripheral surface 22A is formed in a conical surface shape whose outer diameter decreases in the direction toward the center of the frame 10A. As shown in FIG. 5, the surface on the large diameter side is the upper blade. 48
Is arranged so as to abut on the offset surface 64.
The outer diameter of the large-diameter portion is smaller than the outer diameter of the bulge-allowing recess 62 in the upper blade 48, and the web 12
Is formed to be able to press. Therefore, when the web 12 is cut, the pressing roller 22 presses the cutting portion 12C from the front surface 12A of the web 12 and rotates in the same direction as the web 12 conveyance direction at the same peripheral speed as the web 12 conveyance speed. To do.

As shown in FIGS. 2 and 5, the lower blade 54 is
The rotary shaft 8 is formed in a disk shape so that the surface facing the base 46 contacts the peripheral edge of the large-diameter surface of the upper blade 48.
It is fixed concentrically at 0. K in FIG. 5 is the lower blade 5
4 shows the distance from the outer circumference of No. 4 to the outer circumference of the upper blade 48 on the large diameter side, in other words, the overlapping amount of the lower blade 54 and the upper blade 48, in other words, the biting amount. Bite amount K is 0.05mm
The range of ˜1 mm is preferable, and the range of 0.2-0.5 mm is particularly preferable.

A cutting edge surface 55 is formed on the outer periphery of the lower blade 54,
The blade tip tip surface 5 is provided on the peripheral edge of the surface that is in contact with the upper blade 48.
7 are formed.

As shown in FIG. 2, a receiving roller 42 is rotatably provided adjacent to the lower blade 54 and concentric with the lower blade 54 between the lower blade 54 and the base 46 of the rotary shaft 80. There is. On the side adjacent to the lower blade 54 of the receiving roller 42, a reduced diameter portion 42A that is a reduced diameter portion whose outer diameter is conically reduced toward the lower blade 54 is formed. The reduced diameter portion 42A includes the upper blade 4
It is formed so that the cutting edge surface 59 of 8 does not contact.

The support roller 40 is provided on the opposite side of the rotary shaft 80 from the receiving roller 42 with the lower blade 54 interposed therebetween.
It is provided concentrically with the receiving roller 42 and rotatably. Therefore, when the web 12 is cut, the supporting roller 40 and the receiving roller 42 are in contact with the back surface 12B of the web 12 and rotate in the same direction as the web 12 in the same direction as the web 12 is conveyed at the same speed. To do.

FIG. 6 shows the positional relationship between the upper blade 48 and the lower blade 54 when viewed from above. In FIG. 6, the arrow a indicates the web 1
2, the arrow b and the arrow c indicate the rotation directions of the upper blade 48 and the lower blade 54, respectively. The same applies to the following drawings. The receiving roller 42 is omitted.

As shown in FIG. 6, in the trimming portion 25, the upper blade 48 and the lower blade 54 are the cutting edge tip surface 66 of the upper blade 48, the cutting edge tip surface 57 of the lower blade 54, and the cutting portion 12C of the web 12. And so that an opening of the same size is formed from the upstream side to the downstream side. Therefore, the rotary shaft 78 and the rotary shaft 80 are parallel to each other,
Moreover, they are arranged so as to form a predetermined angle with respect to the transport direction a. As shown in FIG. 6, the rotary shaft 78 of the upper blade 48 and the rotary shaft 80 of the lower blade 46 have a plane P to which the blade tip tip surface 66 of the upper blade 48 and the blade tip tip surface 57 of the lower blade 54 belong and the cutting portion 12C. The distance of is in the range of 2.5 to 4 mm at the point moved 1000 mm along the cutting portion 12C in the downstream direction from the position where the web 12 is caught between the upper blade 48 and the lower blade 54. Is preferably arranged in

When the opening between the upper blade 48 and the lower blade 54 and the cutting portion 12C is within the above range, the cutting portion 12C of the web 12 does not come into contact with the upper blade 48 and the lower blade 54 when the blade is returned. There is no problem in cutting.

On the downstream side of the upper blade 48 and the lower blade 54, a conveying roller 83 for conveying the web 12 along the conveying direction a.
A and 83B are provided.

Each of the transport rollers 83A and 83B has a cylindrical barrel, and is arranged along the direction perpendicular to the transport direction a.

As shown in FIG. 2, the cutting roller portion 24 located in the central portion of the frame 10A is rotated by the appropriate driving means (not shown) in the direction in which the web 12 is conveyed.
9 and a pair of upper blades 50 fixed concentrically to the rotary shaft 79.
A pair of rotatable pressing rollers 29 concentrically arranged on the rotating shaft 79 so as to sandwich the pair of upper blades 50 adjacent to the pair of upper blades 50, and an appropriate driving means (not shown). Thus, in the conveyance direction of the web 12, the rotary shaft 81 that rotates around the axis at the same speed as the rotary shaft 79, and the pair of lower blades 56 that are concentrically fixed to the rotary shaft 81 corresponding to the upper blade 50. When,
The lower blade 56 is provided with a pair of rotatable support rollers 41 concentrically provided on the rotary shaft 81 adjacent to the surfaces of the lower blade 56 facing the both ends of the frame body 10A.

The rotary shaft 79 and the rotary shaft 81 are located on the opposite sides of the transport surface T with respect to each other.

A disc spring 52 is provided between the pair of upper blades 50 to urge the upper blades 50 away from each other.

The upper blade 52 is formed similarly to the upper blade 48 except that the upper blade 52 has a smaller thickness, as shown in FIGS. Therefore, it is a substantially dish shape having a conical outer peripheral surface, and a part of the outer peripheral portion projects downward from the transport surface T on the large diameter side. Further, the recessed portion 58, the recessed portion 60, the swelling recessed portion 62, the offset surface 64, and the blade tip end surface 66 are also formed in the same manner, and the blade tip end width L is in the same range as the upper blade 48.

As shown in FIG. 2, the upper blades 50 are arranged on the small diameter side so as to face each other with the disc spring 52 interposed therebetween.

As shown in FIG. 2, the lower blade 56 is also formed in the same manner as the lower blade 54 except that it has a smaller thickness.
The lower blade 56 is positioned so as to sandwich the upper blade 50 from both sides, and on the inner side, that is, on the surface facing the center of the frame body 10A,
The upper blade 50 is in contact with the surface on the large diameter side with a biting amount K. At the overlapping portion of the upper blade 50 and the lower blade 56, the upper blade 50 is pressed against the lower blade 56 by the urging force from the disc spring 52.

The lower blade 56 is adjacent to the pair of lower blades 56.
A cutting debris receiver 72 is formed so as to be sandwiched between.
The cutting debris receiver 72 is a reduced-diameter portion formed so that the diameter thereof is conically reduced toward the lower blade 56 so as to correspond to the shape of the outer peripheral surface of the upper blade 50, and the cutting edge surface of the upper blade 50. It is formed so that 59 does not contact.

Next, how the web 12 is cut, in other words, cut in the metal plate processing apparatus 10 will be described. Upper blade 48, lower blade 54, and upper blade 50
The state in which the web 12 is cut by the lower blade 56 and the lower blade 56 is shown in FIG.

As shown in FIGS. 1 to 7, the web 12 delivered by the delivery device 14 passes along the transport surface T inside the opening of the frame 10A. Then, the web 12 has the upper blade 48 in the trimming portion 25 and the cutting roller portion 24.
Since it passes between the upper blade 48 and the lower blade 54 and between the upper blade 50 and the lower blade 56, the web 12 is caught between the upper blade 48 and the lower blade 54, and between the upper blade 50 and the lower blade 56. A shearing force acts in the thickness direction of. As a result, the web 12 is cut by the cutting roller portion 24 and the trimming portion 25. The cutting scraps 86 generated by the cutting are the upper blade 48 and the reduced diameter portion 42A,
Further, the upper blade 50 and the cutting scrap receiver 72 discharge the metal plate processing apparatus 10 to the outside.

The web 12 is supported by the lower blade 54 or the lower blade 56 on the back surface 12B and the front surface 12A.
At, the outer peripheral surface 22A of the pressing roller 22 is pressed from above. Therefore, the cutting portion 12C of the web 12
Is partially deformed to be continuous with the surface 12A, and an inclined surface inclined at a predetermined inclination angle θ with respect to the surface 12A is formed.
At the same time, the cutting portion 12C plastically deforms and bulges in the direction toward the upper blade 48 or the upper blade 50, and enters the bulge-allowing recess 62. Therefore, the deformation flow of the support body of the web 12 is allowed, so that the web 12 can be surely deformed even if the pressing force of the pressing roller 22 is small.

In the trimming portion 25, the upper blade 48, the lower blade 54, and the web 1 are cut, pressed and cut.
FIG. 8 and FIG. 9 show what positional relationship the two have. Note that, in FIG. 8, the web 12 is shown as being wound around the lower blade 54 so that the web 12 becomes a mountain, but the web 12 is usually conveyed in a substantially flat shape. The pressing roller 22 is omitted in FIG.

At the position where the web 12 is caught between the upper blade 48 and the lower blade 54, the cutting edge surface 59 of the upper blade 48 extends along the lower blade 54 as shown in FIG. 9 (A). It descends and cuts the web 12. Then, at the position where the cutting portion 12C of the web 12 is most strongly pressed by the pressing roller 22, the cutting edge surface 59 of the upper blade 48 is further lowered, as shown in FIG.
The cutting portion 12C in 2 is pressed downward by the pressing roller 22 and an inclined surface is formed on the cutting portion 12C, and at the same time, the cutting portion 12C bulges toward the bulging allowance portion of the upper blade 48. Then, the cutting edge surface 59 of the upper blade 48 is the web 12
At the blade returning position in which the blade returns to the position before cutting and returns to the position before cutting, the blade edge 59 of the upper blade 48 rises along the lower blade 54, as shown in FIG. 9C.

Here, as described above, the upper blade 48 and the lower blade 5
4 is the cutting portion 12 on the downstream side with respect to the transport direction a.
Since it is arranged so as to open with respect to C, as shown in FIGS. 9 (A) to 9 (C), the upper blade 48 substantially comes into contact with the cutting portion 12C at the position and is slightly separated at the position. , The positions are further separated. Therefore, the upper blade 48 cuts the cutting portion 1 when returning the blade after cutting.
No contact with 2C.

In the metal plate processing apparatus 10 in the processing line 90 according to the first embodiment, is it possible to reduce burrs on the back surface?
Alternatively, the web 12 can be sheared under a shearing condition that does not occur at all, and the pressing roller 22 and the lower blade 54 or the lower blade 56 can be sheared.
By pressing the cutting portion 12C to form a bulge, it is possible to more effectively prevent the occurrence of burrs in the PS plate 30, and the peripheral edge of the PS plate 30 obtained has a desired inclination. A surface is formed.

Further, in the trimming section 25 of the metal working apparatus 10, the blade tip tip surface 66 of the upper blade 48 and the blade tip tip 57 of the lower blade 54 do not come into contact with the cutting section 12C when the blade is returned. Therefore, even if the tip end width L of the upper blade 48 is 0.5 mm or more, the cutting portion 12C
Does not come into contact with the blade tip end surface 66 and the blade tip end portion 57 to cause backing or distortion on the surface 12A side of the web 12.

Further, since the upper blade 48 and the lower blade 54 are arranged such that the tip surfaces 66 and 57 of the cutting edges are parallel to each other, a twisting force acts on both the rotating shafts 78 and 80. There is nothing and there is no mechanical strain.

Further, in the cutting roller portion 24, the upper blade 5
When the blade tip tip width L at 0 is set in the range of 0.5 to 0.05 mm, the upper blade 50 is raised when the blade returns.
The tip of the blade does not come into strong contact with the cutting portion 12C. Therefore, in the vicinity of the cut portion 12C, the return to the surface side, the distortion, the defect such as the notch, etc. do not occur.

In addition, since the upper blade 50 is not spilled at the time of cutting, the photosensitive layer 12D is free from scratches and defects caused by the spill.

Therefore, when printing is performed using the PS plate 30 obtained by the processing line 90, since unnecessary ink does not adhere to the printing paper surface, a high quality printed matter can be obtained. Furthermore, for example, when the PS plate 30 is conveyed in the exposure machine, the PS plate 30 does not meander,
The PS plate 30 is also excellent in handleability.

Moreover, in the metal plate processing apparatus 10, the upper blade 4
8 and the upper blade 50 and the pressing roller 22 are arranged on the same rotary shaft, the relative positions of the upper blade 48 and the upper blade 50 and the pressing roller 22 with respect to the web 12 do not shift, and the web 12 The cutting position and the position of the inclined surface 12E do not shift. Therefore, the PS plate 30 having the inclined surface 12E can be obtained with high positional accuracy. Further, since it is not necessary to separately provide a member for forming the inclined surface 12E on the web 12, the structure of the metal plate processing apparatus 10 is simplified and the processing line 90 can be shortened.

The example of the processing line having the metal plate processing apparatus provided with the pair of rotary blades has been described above. However, the metal plate processing apparatus is provided with a so-called guillotine cutter as a cutting member instead of the pair of rotary blades. It goes without saying that the invention described in claim 1 of the present application can also be applied to the above. 2. Embodiment 2 In the processing line of Embodiment 1, a metal plate processing device 10
Instead, an example using the metal plate processing apparatus 11 will be described below.

The processing line according to the second embodiment has the same structure as the processing line 90 according to the first embodiment except that the metal plate processing apparatus 11 is used in place of the metal plate processing apparatus 10.

FIG. 10 shows the metal plate processing apparatus 11 as seen from the upstream side in the conveying direction a of the web 12, and FIG. 11 shows a schematic view of the configuration near the trimming portion 25 from above.
Shown in. 10 and 11, the same reference numerals as those in FIGS. 1 to 9 denote the same elements as those shown in the drawings. In addition, 11A is a frame 1 in FIG.
A frame similar to 0A is shown.

In the pair of trimming portion 25 and cutting roller portion 24 of the metal plate processing apparatus 11, the upper blade rotating shafts 78 and 79 are arranged on the same axis. This also applies to the rotary shafts 80 and 81 of the lower blade.

The metal plate processing apparatus 11 is further equipped with a device shown in FIG.
Further, as shown in FIG. 11, a conveyance unit 83 that conveys the web 12 is provided downstream of the trimming unit 25 and the cutting roller unit 24.

The carrying section 83 comprises a crown roller 83A located above the carrying surface T and a receiving roller 83B located below the carrying surface T.

Crown roller 83A and receiving roller 8
3B is a rotary shaft 7 of the upper blade 48 in the trimming portion 25.
8 and the lower blade 54 are arranged in parallel with the rotating shaft 80.

Here, the surface of the crown roller 83A is
It is formed in a shape in which the diameter is conically reduced from the central portion toward both end portions.

However, the crown roller 83A is pressed by the receiving roller 83B so that the nip pressure in the left half portion in FIG. 11 is higher than the nip pressure in the right half portion, and the left end portion of the crown roller 83A is closer to the center portion. Since the diameter is also small, the conveying direction of the web 12 is slightly deflected to the left in FIG. 11, as indicated by the arrow a ′ in FIG. Therefore, the cutting portion 12C of the web 12 moves away from the upper blade 48 and the lower blade 54 in the trimming portion 25.

Since the metal plate processing apparatus 11 can control the conveying direction of the web 12 by changing the nip balance of the crown roller 83A with respect to the receiving roller 83B, a special device for changing the conveying direction of the web 12 is unnecessary. is there.

As described above, the metal plate processing apparatus of the present invention is provided, and P
The processing line used for producing the S plate has been described. The processing line is not limited to the PS plate described in Japanese Patent Laid-Open No. 10-100556, but has no photosensitive layer formed on the surface and is used as a so-called scrap plate. A lithographic printing plate, a PS plate having a photosensitive layer formed on both sides of an aluminum support,
It goes without saying that a photopolymer, a thermopolymerizable prepolymer or the like can be used for the photosensitive layer and can be used for the production of a PS plate used for a digital printing plate.

[0089]

As described above, according to the present invention,
(EN) Provided are a metal plate processing apparatus and a metal plate processing method capable of effectively preventing the cut portion from being deformed in a wavy shape when a strip-shaped metal plate is cut or side edges are trimmed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of an example of a PS plate processing line including a metal processing apparatus according to the present invention.

FIG. 2 is a front view showing details of the configuration of a metal plate processing apparatus provided in the processing line shown in FIG.

3 is a cross-sectional view showing details of an upper blade included in the metal plate processing apparatus shown in FIG.

4 is an enlarged view showing the vicinity of the tip surface of the cutting edge of the upper blade shown in FIG.

5 is a plan view of the metal plate processing apparatus shown in FIG.
FIG. 3 is a partial cutaway view showing a state in which a PS plate original sheet, that is, a web is cut by an upper blade and a lower blade, and a cut portion of the web is pressed by a pressing roller.

6 is a top view of the upper blade, the lower blade, and the web when the upper blade and the lower blade of the trimming portion in the metal semi-finishing apparatus shown in FIG. 2 cut the web. It is the schematic which shows mutual positional relationship.

FIG. 7 is a cross-sectional view of the metal plate processing apparatus shown in FIG. 2, showing a state in which the web is cut, in a direction perpendicular to the conveyance direction of the web.

FIG. 8 is a side view of the upper blade, the lower blade, and the web conveyance surface with the web when the upper blade and the lower blade of the trimming portion are cutting the web. It is the schematic which shows a relative positional relationship.

FIG. 9 is a schematic diagram showing a relative positional relationship among an upper blade, a lower blade, and a web in a metal plate processing apparatus at the time of starting cutting, pressing, and returning the blade.

FIG. 10 is a schematic diagram showing a configuration of a metal plate processing apparatus included in a processing line according to a second embodiment.

11 is a top view of the upper blade, the lower blade, and the web when the upper blade and the lower blade of the trimming portion in the metal plate processing apparatus shown in FIG. 10 are cutting the web. It is the schematic which shows mutual positional relationship. .

FIG. 12 is a schematic view showing the mutual positional relationship of the upper blade, the lower blade, and the web as viewed from the side when the web is being cut by the conventional cutting machine.

FIG. 13 is a schematic view showing the mutual positional relationship between the upper blade, the lower blade, and the web when cutting the web in the conventional cutting machine, as viewed from the downstream side with respect to the web transport direction. Is.

[Explanation of symbols]

10 Metal plate processing equipment 11 Metal plate processing equipment 12 Web 12C cutting part 14 Sending machine 21 Cutting unit 24 Cutting roller 25 Trimming part 30 PS version 48 Upper blade 54 Lower blade 90 processing line

Claims (7)

[Claims] 1. A pair of rotary blades for cutting a widthwise end portion of a continuous strip-shaped metal plate traveling in a constant direction, wherein a rotary shaft of the rotary blade has a blade edge of the rotary blade and the metal. A metal plate, which is arranged at an angle with respect to the running direction of the metal plate so that the cutting portion of the plate opens toward the downstream side with respect to the running direction of the metal plate. Processing equipment. 2. A transport roller for transporting the metal plate along the running direction, wherein the rotary shaft of the rotary blade is arranged so as to form a constant angle with respect to the axis of the transport roller. The metal plate processing apparatus according to claim 1, wherein 3. A transport roller for transporting the metal plate, wherein a rotary shaft of the rotary blade is arranged parallel to an axis of the transport roller, and the transport roller is configured to rotate the rotary plate. The metal plate processing apparatus according to claim 1, wherein the metal plate is skewed so that a blade tip of the blade and a cutting portion of the metal plate open in a downstream direction with respect to a traveling direction of the metal plate. 4. The opening angle of the rotary shaft of the rotary blade between the blade edge of the rotary blade and the cutting portion of the metal plate toward the downstream side with respect to the traveling direction of the metal plate is 0.13 °.
The metal plate processing apparatus according to any one of claims 1 to 3, wherein the metal plate processing apparatus is arranged so as to be in a range of 0.23 °. 5. The metal plate is an aluminum support web used as a base material of a lithographic printing plate, which is formed by roughening at least one surface of a continuous aluminum thin plate in a band shape. The metal plate processing apparatus according to item 1. 6. The metal according to claim 1, wherein the metal plate is a lithographic printing plate having a plate-making layer formed on the surface of the aluminum support web on the roughened side. Plate processing equipment. 7. The rotating shaft is arranged at an angle with respect to the running direction of the metal plate so that the cutting edge and the cut portion of the metal plate open toward the downstream side with respect to the running direction of the metal plate. A method for processing a metal plate, which comprises cutting a widthwise edge of a metal plate traveling in a fixed direction by using a pair of rotary blades provided.