JP4860585B2 - Plate plate loading assist device - Google Patents

Description

  The present invention relates to an apparatus for automatically mounting a printing plate on a plate cylinder of a rotary printing press, wherein a bent portion formed by bending the printing plate at an acute angle is formed on one side of an opening parallel to the axis of the plate cylinder circumferential surface. The present invention relates to a plate mounting auxiliary device for reliably bringing the inside of a bent portion of a printing plate into contact with the edge when hooked on an acute edge.

  For example, Japanese Patent Laid-Open No. 2001-277472 (hereinafter referred to as a publicly known document) is an apparatus that automatically attaches or removes a printing plate to or from a plate cylinder of a rotary printing press without regard to human hands (hereinafter referred to as an automatic detaching apparatus). 1), JP-A-8-108525 (hereinafter referred to as publicly known document 2), and Japanese Patent Publication No. 7-115462 (hereinafter referred to as publicly known document 3).

  In any of these known automatic attachment / detachment devices, the bent portion of the printing plate in which a bent portion is formed at the end is hooked on the edge of one side of the opening parallel to the axis of the plate cylinder circumferential surface. Wrap it around the circumference of the plate cylinder. That is, as shown in FIG. 5, in order to attach the printing plate P to the plate cylinder C, an opening G parallel to the axis of the plate cylinder C is provided on the surface thereof, and the plate cylinder C of the opening G is provided. On one side facing the rotational direction (direction indicated by arrow A1), an edge e is formed by a plate cylinder circumferential surface Cs and a wall surface Ch inclined at an acute angle αx degrees with respect to a plane contacting the plate cylinder circumferential surface Cs. Is formed.

  Further, the printing plate P is bent to the back side at an acute angle αy degree on one side to form a bent portion P1. Specifically, the edge e is a curved surface having a radius r, and the inner side f2 of the bent portion P1 of the printing plate P is also a curved surface having a radius r. Under such a configuration, when the bent portion P1 of the printing plate P is hooked on the edge e of the opening G parallel to the axis of the plate cylinder C, the bent portion P1 extends in the width direction of the printing plate P. The plate P can be accurately attached to a predetermined position of the plate cylinder peripheral surface Cs by hooking the inner side f2 of the plate G in contact with the edge e of the opening G. That is, it can be attached to the plate cylinder circumferential surface Cs at a predetermined position without being inclined.

  Therefore, the bending angle αy degree of the inner side f2 of the bent portion P1 of the printing plate P and the acute angle αx degree formed by the wall surface Ch of the opening G of the plate cylinder C to which the bending angle Pn is hooked with the tangential plane of the plate cylinder circumferential surface Cs are one. It is desirable to do it. However, the angles αx degrees and αy degrees both have a processing tolerance range, and if the tolerance range is αy degrees <αx degrees, the bent portion P1 of the printing plate P is opened to the opening portion of the plate cylinder circumferential surface Cs. As shown in FIG. 5, the inner side f2 of the bent portion P1 and the edge e of the opening G are not in contact with each other only by being hooked on the edge e of G, and a gap cc is formed in the circumferential surface direction of the plate cylinder C. Then, the printing plate P is attached so as to be shifted from the predetermined position in the rotation direction of the plate cylinder circumferential surface Cs by the gap cc.

  By the way, in the automatic attachment / detachment apparatus described in the known document 3, the printing plate stocked at a predetermined position is carried out toward the printing cylinder by the suction pad as the printing plate holding means, and the folding margin of the folding portion of the printing plate is changed. The plate is inserted into the opening of the plate cylinder circumferential surface, and then completely inserted by a pressing roller, and the vicinity of the bent portion of the printing plate is pressed against the circumferential surface of the plate cylinder.

  Moreover, in the automatic attachment / detachment apparatus described in the publicly known document 2, the printing plate is carried into the rotated plate cylinder, and the opening of the rotating plate cylinder circumferential surface is loaded with the folding allowance of the folding portion of the printing plate. When aligned with the tip position, the folding margin of the bent portion of the printing plate enters the opening, and then the pressing roller is configured to press the vicinity of the bent portion of the printing plate in this state against the peripheral surface of the plate cylinder. Yes.

Furthermore, in the automatic attachment / detachment apparatus described in the publicly known document 1, it is held by a vacuum suction pad that is a holding means for the printing plate, and the folding margin of the bending portion of the printing plate is inserted into the opening of the plate cylinder peripheral surface, thereby vacuum suction. While holding the pad for a predetermined time, the plate cylinder is rotated in the winding direction of the printing plate, and when the printing plate is wound around the circumferential surface of the printing plate, a braking force is applied to the printing plate to fold the printing plate. The inner side of the bent portion and the edge of the opening portion of the plate cylinder are configured to be in good contact.
JP 2001-277472 A (Publication 1) JP-A-8-108525 (Publication 2) Japanese Patent Publication No.7-115462 (Publication 3)

  However, the automatic attachment / detachment devices described in the above-mentioned known documents 1 to 3 have the following problems. That is, in the automatic attachment / detachment apparatus described in the known document 3, when carrying out the stocked printing plate toward the plate cylinder, it may be displaced with respect to the suction pad due to vibration or the like. The folding margin is inserted into the opening on the circumferential surface of the plate cylinder and pressed by the presser roller, so that the inside of the bent portion of the printing plate becomes non-parallel to the edge of the opening of the printing drum, and the printing plate is placed on the plate cylinder. The inconvenience of being wound in an inclined state occurred.

  Further, in the automatic attachment / detachment apparatus described in the known document 2, when the folding margin of the bending portion of the printing plate enters the opening portion of the rotating plate cylinder circumferential surface, the printing plate may be displaced due to an impact falling on the opening portion. The plate is pressed by the pressing roller as it is, and the inside of the bent portion of the printing plate becomes non-parallel to the edge of the opening of the printing drum, and the printing plate is placed on the printing drum in the same manner as the automatic attachment / detachment device described in the known document 3. The inconvenience of being wound in an inclined state occurred.

  Furthermore, in the automatic attachment / detachment apparatus described in the publicly known document 1, it is necessary to provide a vacuum pump for generating a negative pressure on the suction pad in order to hold the printing plate by the vacuum suction pad. Since a large amount of paper dust and ink mist are present during the printing operation and adhere to the suction pad, the suction force of the suction pad may be reduced. In addition, the adsorption force acting on the left and right sides of the printing plate may be unbalanced due to a decrease in the adsorption force of the adsorption pad, and as a result, the angle inside the bent portion of the printing plate is changed as described above. Because the angle is smaller than the angle of the edge of the opening of the plate, simply inserting the bending margin of the bent portion of the printing plate into the opening of the peripheral surface of the plate cylinder and the opening of the plate cylinder When there is a gap with the edge of the plate, it is extremely rare for the inside of the bent part of the plate to be exactly parallel to the edge of the opening of the plate cylinder, and the plate is inclined to the plate cylinder. The inconvenience of being wound around occurred.

The plate mounting auxiliary device of the present invention operates together with a mounting device capable of automatically mounting a printing plate on a plate cylinder of a rotary printing press, and the mounting device is parallel to the axis of the plate cylinder on the peripheral surface of the plate cylinder. In a plate mounting auxiliary device used when a bent portion formed by bending a printing plate at an acute angle is hooked on an acute edge formed on one side of an opening, a standby position and an operation position relative to the edge And a pressing force of the bent portion of the printing plate toward the edge in contact with the outside of the bent portion of the printing plate that is hooked on the edge at the operating position. A block in which a pressing part to be applied to the bent part is formed, and an output shaft linked to a rear end surface of the block different from the pressing part is moved in the axial direction to move the block between the standby position and the action position. Drive source to move between Rutotomoni, and an output device which is a source of the pressing force, the slope of the pressing portion of the block located at the operating position, a direction perpendicular to the pressing portion, and the wall surface of the plate cylinder openings Formed in a range sandwiched between the tangential line of the plate cylinder peripheral surface at the edge line of the edge of the opening , and the output device extends the output shaft to move the block in the extending direction of the output shaft. In a state where the pressing portion is in the working position, the pressing portion contacts the outside of the bent portion of the printing plate to apply a pressing force to the printing plate, and the bent portion is pressed toward the edge, The edge and the inner side of the bent portion are provided so as to contact each other.

  In the present invention, as in the known document 2 and the known document 3, the inside of the bent portion of the printing plate is not parallel to the edge of the opening of the plate cylinder, and the printing plate is wound around the plate cylinder. The problem of the known literature is overcome.

  Further, according to the present invention, even when a gap is formed between the inside of the bent portion of the printing plate and the edge of the opening portion of the plate cylinder as in the known document 1, the printing plate is inclined to the plate cylinder. There is no inconvenience of being wound around the paper, and the problem of the known document 1 is overcome.

  Furthermore, the present invention has an effect that the printing plate can be attached to a predetermined position on the circumferential surface of the plate cylinder without inclining while having a very simple and small configuration as compared with the conventional one. In other words, the printing plate is not affected by the relationship between the angle inside the bent portion of the printing plate and the angle of the edge of the opening on the peripheral surface of the printing drum, and is not affected by the situation around the printing drum. There is an effect that the inner side of the bent portion of the plate and the edge of the opening portion of the peripheral surface of the plate cylinder can be reliably brought into contact with each other.

Embodiments of the present invention will be described with reference to the drawings. A part of the state where the bent portion P1 of the printing plate P is hooked on the edge e of the opening G provided in the plate cylinder C is related to the plate mounting auxiliary device of the first embodiment which is the most preferred embodiment of the present invention. FIG. 1, which is an explanatory view, and FIG. 2, which is an explanatory view in the same state as FIG. 1, relating to the printing plate mounting auxiliary device according to the second embodiment of the present invention, and a perspective view of FIG. FIG. 3 is an enlarged view of the opening G of the plate cylinder C on which the bent portion P1 of the printing plate P of the printing plate loading assisting device according to the first embodiment of the present invention is hooked, and the slope (pressing portion) of the block B1. Figure 4 B13 is a view illustrating the operation that imparts pressing force to the outer f 1 of the bent portion P1, it indicates the opening of the plate cylinder of a rotary printing press, the bent portion and the opening edge of the plate FIG. 5, which is an explanatory diagram showing the relationship, of the continuous paper W that can be equipped with the plate mounting auxiliary device according to the present invention FIG. 4 is a cross-sectional view perpendicular to the axis of the plate cylinder showing the vicinity of the plate cylinders C and C of the offset rotary printing press 10 for double-sided printing, and new printing plates P and A description will be given based on FIG. 6, which is an explanatory view showing a state where the P bent portions P <b> 1 and P <b> 1 are hooked.

  In FIG. 6, D is a blanket cylinder, and a blanket J is attached to the peripheral surface. R1 to R3 are rubber rollers for supplying ink, and R4 is a rubber roller for supplying dampening water. FIG. 6 shows a state in which the contact between each cylinder and the rubber roller is released, and each of the above-described members is one above and below the continuous paper W and operates in the same manner.

  A block B1 according to the first embodiment of the present invention provided in the offset rotary printing press 10 includes a lower tip portion B11, an upper rear end surface B12, and a slope serving as a pressing portion formed at an acute angle z degree. It consists of a triangular prism with a side wedge shape having B13. The block B1 is attached to the output shaft H11 of the output device H1 at the upper rear end face B12.

  The body H12 of the output device H1 according to the first embodiment of the present invention is attached and fixed to the frame of the offset rotary printing press 10 by a bracket (not shown). In this embodiment, the output device H1 includes a fluid pressure cylinder, and the block B1 can be moved in the radial direction with respect to the plate cylinder C. The body H12 of the output device H1 is attached so that the moving direction of the tip B11 of the block B1 coincides with the opening G of the plate cylinder C when the plate cylinder C stops at a fixed position for mounting the printing plate P. Yes.

Plate cylinder C is, when stopping the place, the plate cylinder C hooking the bent portion P1 of Suriban P to the edge e of the opening G of the output shaft H1 1 by operating the output device H 1 It expand | extends and the front-end | tip part B11 of the block B1 enters in the opening part G. FIG. The slope (pressing part) B13 of the block B1 contacts the outer side f1 of the bent part P1 hooked on the edge e of the opening G of the plate cylinder C, and further the force is applied to the block B1 in the direction in which the output shaft H11 1 extends. Is added, the inclined surface (pressing portion) B13 of the block B1 can apply a vertical pressing force to the inclined surface (pressing portion) B13 indicated by the arrow HF with respect to the outer side f1 of the bent portion P1 of the printing plate P. .

The inclination of the inclined surface (pressing portion) B13 of the block B1, the slope (pressing unit) B13 in the direction perpendicular, i.e. the slope (pressing portion) B13 is pressing force to the outer f 1 of the bent portion P1 of the plate P The direction HF to be applied is a range sandwiched between the tangent plane of the wall surface Ch and the edge e of the edge G of the opening G, preferably the center direction of the range, that is, the inclined surface (pressing portion) B13 and the opening G. The angle z degree (in this embodiment, the angle z of the tip end portion B11) formed with the radial direction of the plate cylinder C in FIG. 1 is approximately one half of the angle αx degree of the edge e of the opening G of the plate cylinder C. The slope (pressing portion) of the block B1 is configured.

  Next, in the process of automatically mounting a new printing plate P on the plate cylinder C, the bent portion P1 of the printing plate P is hung on the edge e of the opening G of the plate cylinder C, and the block B1 bends the printing plate P. A process of bringing the inner side f2 of the portion P1 into contact with the edge e of the opening G of the plate cylinder C will be described. Since the process of hooking the bent portion P1 of the printing plate P to the edge e of the opening G of the plate cylinder C is known to be performed by various automatic devices, it will be briefly described here.

First, as described in the background art, the case where the bending angle αy degree forming the bent portion P1 of the printing plate P within the range of the processing tolerance is smaller than the angle αx degree of the edge e will be described. The printing plate P can be moved to a predetermined position while holding the printing plate. For example, at least a bent portion P1 of the printing plate P is provided by a printing plate holding means (not shown) attached to a robot arm. The vicinity of the formed side is made substantially parallel to the tangential plane of the plate cylinder peripheral surface Cs of the plate cylinder C, and the bent portion P1 is brought close to the plate cylinder peripheral surface Cs. On the other hand, the plate cylinder C rotates and stops when the opening G reaches a predetermined position for hooking the bent portion P1 of the printing plate P.

  The printing plate holding means inserts the folding margin of the bending portion P1 of the printing plate P into the opening G with its inner end along the wall surface Ch. At this time, since αy degree <αx degree as described above, a gap cc is formed between the inner side f2 of the bent portion P1 and the edge e of the opening G of the plate cylinder C as shown in FIG.

Therefore, the output device H1 is operated to extend the output shaft H11, and the block B1 ′ that has been waiting at a standby position on the radial extension line of the plate cylinder C at the opening G of the plate cylinder C.
The tip portion B11 is inserted into the opening G and imparts a pressing force to the plate P from the contact point with contacting the inclined surface (pressing portion) B13 outside f 1 of the bent portion P1 of the plate P.

Here, the direction HF in which the inclined surface (pressing portion) B13 applies a pressing force to the outer side f1 of the bent portion P1 is sandwiched between the tangent line to the plate cylinder circumferential surface Cs at the ridgeline of the edge e of the wall surface Ch and the opening G. It is the approximate center direction of the range. Accordingly, the inclined surface (pressing portion) B13 pressing force applied to the outer f 1 of the bent portion P1 from the holding in the tangential direction of the plate cylinder peripheral surface Cs for winding the coming plate cylinder peripheral surface Cs and end wall Ch The front end portion of the folding portion P1 that hangs substantially evenly in the direction of the plate surface P2 of the printing plate P that is in contact with the wall surface Ch is slid along the wall surface Ch to open the opening G. The inner side of the plate surface P2 that is pushed inwardly and is in contact with the edge e of the opening G of the plate cylinder circumferential surface Cs of the plate cylinder C is the side on which the bent portion P1 of the printing plate P is provided by sliding. Is pushed in the direction of the opposite side P3, and at the same time, the bending angle αy degree of the bent portion P1 is expanded, the inside of the folding margin of the bent portion P1 is in close contact with the wall surface Ch, and the inner side f2 of the bent portion P1 The edge e of the opening G of the plate cylinder C completely contacts. (See Figure 4)

After the operation is completed, returning the output device H 1 to the position of the block B1 'is a standby position away block B1 is operated during the reverse direction the operation from the plate cylinder C. The plate cylinder C is moved in the forward rotation direction indicated by the arrow A1 while pressing the plate surface P2 against the plate cylinder circumferential surface Cs with a roller (not shown) so that the inside of the plate surface P2 of the printing plate P is in close contact with the plate cylinder circumferential surface Cs. The plate surface P2 of the printing plate P is wound around the plate cylinder circumferential surface Cs by rotating it once. The printing plate P is wound on a side P3 opposite to the side on which the bent portion P1 is provided by a winding shaft K in the opening G, and the printing plate P is fixed to the plate cylinder C and the plate of the printing plate P is fixed. Complete the mounting on the trunk C.

  Next, a case where the bending portion P1 is hooked on the edge e of the opening G in a state where the printing plate P is inclined and deviated from a state parallel to the axis of the plate cylinder C will be described. When the printing plate P is inclined with respect to the axis of the plate cylinder C, the question of the edge e of the opening G parallel to the axis of the plate cylinder C and the inner side f2 of the bent portion P1 is one end in the width direction of the printing plate P. Are in contact with each other, but a gap gradually widens toward the other end.

Therefore, the output device H1 is operated to extend the output shaft H11, and the block B1 ′ that has been waiting at a standby position on the radial extension line of the plate cylinder C at the opening G of the plate cylinder C.
The tip portion B11 is inserted into the opening G so that the inclined surface (pressing portion) B13 is brought into contact with the outer side f1 of the bent portion P1 of the printing plate P and a pressing force is applied to the printing plate P from the contact point. Plate P by the pressing force applied to the outer f 1 of the bent portion P1 from a slant (pressing portion) B13 of the block B1 is retained in the tangential direction of the plate cylinder peripheral surface Cs for winding the coming plate cylinder peripheral surface Cs The inner side f2 of the bent portion P1 that is pressed in the direction of the printing plate P2 and has a gap with the edge line of the edge e of the opening G is the opening G of the plate cylinder circumferential surface Cs of the plate cylinder C. The back side of the plate surface P2 that is in contact with the edge e portion of the printing plate slides and is pushed in the direction of the side P3 opposite to the side where the bent portion P1 of the printing plate P is provided. e and the inner side f2 of the bent portion P1 are in contact with each other in the width direction of the printing plate P, and the printing plate P is parallel to the axis of the plate cylinder C.

Thereafter, the plate cylinder C is indicated by an arrow A1 while pressing the surface of the plate surface P2 against the plate cylinder circumferential surface Cs with a roller (not shown) so that the back side of the plate surface P2 of the printing plate P is in close contact with the plate cylinder peripheral surface Cs. The plate surface P2 of the printing plate P is wound so as to follow the plate cylinder circumferential surface Cs. The printing plate P is wound on a side P3 opposite to the side on which the bent portion P1 is provided by a winding shaft K in the opening G, and the printing plate P is fixed to the plate cylinder C and the plate of the printing plate P is fixed. Complete the mounting on the trunk C.

In this embodiment, the block B1 is provided at three positions, both ends and the center in the width direction of the printing plate P, as shown in FIG. The outer side f 1 of the bent portion P1 of the printing plate P is not easily deformed because it is bent, and is provided at three positions in the width direction of the printing plate P at both ends and the center as shown in FIG. it can be brought into contact with the inner f2 entire bent portion P1 on the edge e of the opening G in applying a pressing force to the outer f 1 of the bent portion P1 Te. When the width of the printing plate P is narrow, the same effect can be obtained by providing the blocks B1 at both ends in the width direction of the printing plate P.

  In the second embodiment of the present invention, the output device H2 is arranged so that the output direction of the output device H2, that is, the extending direction of the output shaft H21 coincides with the direction of the pressing force applied to the outer side f1 of the bent portion P1 of the printing plate P. And a pressing force is applied to the outer side f1 of the bent portion P1 by a surface B21 perpendicular to the output direction of the output shaft H21 of the block B2, and the operational effects are the same as in the first embodiment.

The output instrumentation 置及 beauty block is not limited to the embodiments shown in the above embodiment, the block B 1, B 2 in accordance with the width of the plate P in the width direction of the plate P, It suffices to provide at least in the vicinity of both side end portions and to arrange an appropriate number of them at appropriate intervals according to the width of the printing plate P.

  The present invention is used as an auxiliary device for an apparatus for automatically mounting a printing plate on a plate cylinder of a rotary printing press. Specifically, it is used as a plate loading auxiliary device to ensure that the inside of the bent portion of the printing plate comes into contact with the edge of the plate cylinder opening when the printing plate is automatically loaded on the plate cylinder of a rotary printing press. The

A part of the state where the bent portion P1 of the printing plate P is hooked on the edge e of the opening G provided in the plate cylinder C is related to the plate mounting auxiliary device of the first embodiment which is the most preferred embodiment of the present invention. Explanatory diagram FIG. 1 is an explanatory view showing the same state as that of FIG. 1 with respect to the plate mounting auxiliary device of the second embodiment of the present invention. The perspective view which looked at FIG. 1 from diagonally upward FIG. 3 is an enlarged view of an opening G of a plate cylinder C on which a bending portion P1 of the printing plate P of the printing plate mounting auxiliary device according to the first embodiment of the present invention is hooked, and a slope (pressing portion) B13 of the block B1 is bent. operation explanatory diagram that imparts a pressing force to the outer f 1 parts P1 Figure showing the opening of the plate cylinder of a rotary printing press and explaining the relationship between the bent part of the printing plate and the edge of the opening Sectional view perpendicular to the axis of the plate cylinder showing the vicinity of the plate cylinder of a rotary offset press capable of being equipped with the plate mounting auxiliary device according to the present invention

Explanation of symbols

10: web offset printing press W: continuous paper C: plate cylinder Cs: plate cylinder circumferential surface Ch: wall surface G: opening e: edge αx: edge angle K: winding axis D: blanket cylinder J: blankets R1, R2, R3: Ink supply rubber roller R4: Dampening water supply rubber roller P: Printing plate P1: Folded portion f1: Outside of the bent portion f2: Inside of the bent portion αy: Inner angle of the bent portion P2: Plate surface P3: The side opposite to the bent portion side of the printing plate H1: Output device (first embodiment)
H11: Output shaft (first embodiment)
H12: Body (first embodiment)
B1, B1 ′: Block (first embodiment)
B11: Block tip (first embodiment)
B12: Block rear end surface (first embodiment)
B13: Block slope (pressing portion) (first embodiment)
z: Block slope angle (block tip angle) (first embodiment)
H2: Output device (second embodiment)
H21: Output shaft (second embodiment)
H22: Body (second embodiment)
B2, B2 ′ block (second embodiment)
B21: Block front end surface (second embodiment)
B22: Block rear end surface (second embodiment)
A1: Arrow HF indicating the rotation direction of the plate cylinder (-forward direction) HF: Arrow indicating the direction of force

Claims (2)

An acute angle formed on one side of an opening parallel to the axis of the plate cylinder on the peripheral surface of the plate cylinder, operating together with a mounting device capable of automatically mounting a printing plate on a plate cylinder of a rotary printing press In the plate mounting auxiliary device used when hooking a bent portion formed by bending the printing plate at an acute angle on a sharp edge,
It is possible to move between a standby position and an operation position opposite to the edge, and the bending of the printing plate is brought into contact with the outside of the bending portion of the printing plate hooked on the edge at the operation position. A block formed with a pressing portion for applying a pressing force toward the edge to the bent portion;
A drive source for moving the output shaft linked to the rear end surface of the block different from the pressing portion in the axial direction to move the block between the standby position and the operating position, and generating the pressing force An output device as a source;
With
The inclination of the pressing portion of the block located at the working position is sandwiched between the wall surface of the plate cylinder opening and the tangential plane of the plate cylinder circumferential surface at the edge line of the edge of the opening in the direction perpendicular to the pressing portion. Formed in a range ,
The output device extends the output shaft to move the block in the extending direction of the output shaft, and the pressing portion is located outside the bent portion of the printing plate in a state where the block is located at the working position. A printing plate characterized by being provided so as to contact and apply a pressing force to the printing plate so that the bent portion is pressed toward the edge so that the edge contacts the inside of the bent portion. Wearing assistance device.   The plate mounting auxiliary device according to claim 1, wherein a plurality of pressing portions are provided in the plate cylinder axis direction so that a pressing force can be applied at least in the vicinity of both ends in the plate cylinder axis direction of the printing plate.

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