JP4361624B2 - Sheet-like material conveyance device for sheet-fed rotary printing press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet-fed rotary printing press for transferring a sheet-like material printed between a rubber cylinder and an impression cylinder from a gripper claw device of an impression cylinder to a gripping claw device of a transfer cylinder or a discharge cylinder. The present invention relates to a shaped article conveying apparatus.
[0002]
[Prior art]
FIG. 3 is a side view for explaining how to replace the paper between the impression cylinder and the transfer cylinder in a conventional sheet-fed rotary printing press.
In the figure, reference numeral 1 denotes a rubber cylinder that comes into contact with a plate cylinder (not shown), and 2 denotes a pressure cylinder that comes into contact with the rubber cylinder 1, and fine irregularities are formed on the surface to prevent adhesion of ink. The peripheral surface is covered with a plate (not shown) for preventing adhesion. In addition, a pair of notches (not shown) are formed on the peripheral surface of the impression cylinder 2 so as to extend in the axial direction, and a pair of gripping claw devices 4 (one is not shown) are formed in these notches. Each) is provided. Reference numeral 3 denotes a transfer cylinder that comes into contact with the impression cylinder 2, and a pair of notches (not shown) are formed on the peripheral surface so as to extend in the axial direction, and a pair of holding claws are formed in these notches. Devices 5 (one not shown) are each provided. In such a configuration, the paper 6 printed between the rubber cylinder 1 and the impression cylinder 2 is held at the start end by the gripping device 4 of the impression cylinder 2 and is conveyed in the direction of the arrow in the figure, and the transfer cylinder 3 At the opposite contact point, the starting end of the paper 6 is replaced by the gripper device 5 of the transfer cylinder 3.
[0003]
FIG. 4 is a side view for explaining how to replace the paper between the impression cylinder and the discharge cylinder in a conventional sheet-fed rotary printing press.
In the figure, reference numeral 8 denotes a paper discharge cylinder that is in contact with the impression cylinder 2, and a pair of left and right sprockets 9 and 9 (one sprocket 9 is not shown) are arranged on the left and right sides on the same axis as the paper discharge cylinder 8. Axis is attached close to the paper discharge frame. Between the sprockets 9 and 9 and a pair of left and right sprockets (not shown) that are rotatably supported at the front end of the paper discharge frame, a pair of left and right paper discharge chains 10 and 10 (one paper discharge chain 10 is shown in the figure). Is omitted). As the sprocket 9 rotates, a plurality of sets of claw rods composed of a claw shaft and a claw base shaft are provided in the running direction of the discharge chain 10 between the left and right discharge chains 10 and 10 that run in the direction of the arrow in the figure. It is suspended at regular intervals.
[0004]
On the claw shaft and the claw base shaft, a plurality of claw and claw base are arranged in the axial direction so as to face each other to constitute a gripper claw device 11. In such a configuration, the paper 6 printed between the rubber cylinder 1 and the impression cylinder 2 is held at the starting end by the gripping device 4 of the impression cylinder 2, conveyed in the direction of the arrow in the figure, and discharged. At the opposite contact point of the paper cylinder 8, the starting end of the paper 6 is replaced by the gripping claw device 11 of the paper discharge cylinder 8. The paper 6 that has been replaced is conveyed in the direction of the arrow as the paper discharge chain 10 travels, and is released from the holding of the holding claw device 11 and dropped onto the paper stacking unit at the conveyance end portion.
[0005]
[Problems to be solved by the invention]
In the conventional sheet-fed rotary printing press described above, when the paper is replaced between the impression cylinder 2 and the transfer cylinder 3 or the discharge cylinder 8, the impression cylinder is inserted for the convenience of inserting paper between the cylinders. The diameter of the transfer cylinder 3 or the discharge cylinder 8 is slightly smaller than the diameter of 2. Accordingly, the rotational speed of the impression cylinder 2 and the transfer cylinder 3 or the discharge cylinder 8 are set to be the same, but the speed of the claw of the transfer cylinder 3 or the discharge cylinder 8 is lower than the peripheral speed of the impression cylinder 2. ing. For this reason, the length of the paper received by the transfer cylinder 3 or the discharge cylinder 8 is less than the length of the paper passed from the impression cylinder 2, the contact point between the rubber cylinder 1 and the impression cylinder 2, and the impression cylinder 2 A slack portion 6 a is generated on the paper 6 between the transfer drum 3 and the contact point with the paper discharge drum 8. On the other hand, when the paper bottom portion 6b of the paper 6 passes through the contact point between the rubber cylinder 1 and the impression cylinder 2, the paper bottom portion 6b is formed in the rubber cylinder due to the viscosity of the ink interposed between the rubber cylinder 1 and the paper 6. 1 is pulled toward the rubber barrel 1 side. In this state, when the paper bottom portion 6b is further pulled toward the rubber cylinder 1, the above-mentioned slack portion 6a is also pulled toward the paper bottom portion 6b, and the amount pulled at the paper bottom portion 6b is indicated by a two-dot chain line in the figure. As shown, it becomes larger and the slack portion 6a disappears. At this time, since the paper 6 is slidably in contact with the peripheral surface of the impression cylinder 2 between the slack portion 6a and the paper bottom portion 6b, in the case of a double-sided printing machine, the surface having the unevenness of the adhesion preventing plate of the impression cylinder 2 As a result, there is a problem that the printed surface of the paper 6 is left with marks due to scratches or rubbing.
[0006]
The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to prevent the sheet-like material from being traced by scratches or rubbing when the paper is transferred from the impression cylinder to the conveyance cylinder. It is providing the sheet-like material conveyance apparatus of a leaf rotary printing press.
[0007]
[Means for Solving the Problems]
In order to achieve this object, the invention according to claim 1 is a sheet for transferring a sheet-like material printed between a printing cylinder and an impression cylinder from a holding claw device of the impression cylinder to a holding claw device of a conveying cylinder. In the sheet-like material conveying apparatus of a leaf rotary printing press, the pressure cylinder is urged toward the impression cylinder side between a contact point between the printing cylinder and the impression cylinder and a contact point between the conveyance cylinder and the impression cylinder. When the gripper nail device of the cylinder opposes , the sheet-like object is separated from the gripper nail device of the transfer cylinder from the gripper nail device of the transfer cylinder so that the sheet-like material is transferred to the printing cylinder and the impression cylinder. And a rotating body that restricts the sheet-like material from being slidably contacted with the peripheral surface of the impression cylinder when the sheet-like material is pulled by the printing cylinder .
Accordingly, the sheet-like material to be replaced by the gripper device of the transfer cylinder is pressed against the impression cylinder side by the rotating body between the contact point between the printing cylinder and the impression cylinder and the contact point between the transfer cylinder and the impression cylinder. .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an unfolded main portion of a sheet-like material transport device of a sheet-fed rotary printing press according to the present invention, FIG. 2 (a) is a view taken in the direction of arrow II (a) in FIG. ) Is a view taken in the direction of arrow II (b) in FIG.
In FIG. 1, a pair of left and right frames 13 and 13 are fixed by bolts so that a pair of shaft support members 14 and 14 face each other, and a support shaft 15 is interposed between the pair of shaft support members 14 and 14. Is restricted from moving in the axial direction and is supported rotatably. As shown in FIG. 2A, a conical recess 15 a is formed in the upper portion of the support shaft 15, and a large number of recesses 15 a are provided in the axial direction of the support shaft 15.
[0009]
Three pairs of roller units 16 are supported on the support shafts 15. The roller units 16 include a support member 17 formed in a substantially cylindrical shape that is fitted into the support shaft 15, and a rubber rotating body. The roller 22 is provided. A fitting insertion hole 17a having an inner diameter slightly larger than the outer diameter of the support shaft 15 is formed at the center of the support member 17, and a threaded portion 17b is projected from the upper portion. The threading portion 17b has a fitting insertion hole. A screw hole communicating with 17a is provided. Further, a stopper portion 17c projects from the lower portion of the support member 17, and a support portion 17d projects from the right end of the center in the vertical direction.
[0010]
Reference numeral 18 denotes a set screw that is screwed into the threaded portion 17b of the support member 17. The tip is formed sharply, and the tip is engaged with the recess 15a of the support shaft 15, whereby the support member 17 is moved in the axial direction. Movement and rotation are regulated and fixed to the support shaft 15. A swing member 19 is swingably supported on the support portion 17d of the support member 17 via a pin 20, and a shaft 21 is implanted at the lower end of the swing member 19 as shown in FIG. The roller 22 is rotatably supported on the shaft 21 via a bearing. As shown in FIG. 2, the roller 22 is disposed between a contact point A between the rubber cylinder 1 and the impression cylinder 2 as a printing cylinder and a contact point B between the impression cylinder 2 and a discharge cylinder 8 as a conveyance cylinder. It is positioned to correspond. Reference numeral 23 denotes a screw portion integrally formed with the swing member 19, and the tip of the screw 24 screwed into the screw portion 23 is in contact with the stopper 17 c of the support member 17.
[0011]
One end of the support shaft 15 protrudes outward from the shaft support member 14, and a substantially U-shaped lever 26 is pivotally attached to the protruding end portion, and a cam follower 27 is rotatable at one end of the lever 26. It is supported. A cam 28 composed of a small diameter portion and a large diameter portion is fixed to the side end surface of the impression cylinder 2 corresponding to the cam follower 27, and the impression cylinder 2 rotates as the impression cylinder 2 rotates. The roller 22 is positioned so as to contact the cam follower 27 when the roller 22 described above faces the gripper device 4.
[0012]
Reference numeral 30 denotes a stud, which is pivotally attached to a bracket 31 fixed to one frame 13, and a sliding shaft 32 is slidably supported on the stud 30. Dropping from the stud 30 is restricted by a nut 33 screwed into one end of the shaft 32. The other end of the lever 26 described above is pivotally attached to the head portion 32 a of the sliding shaft 32, and a compression coil spring 34 is interposed between the head portion 32 a and the stud 30. As shown by an arrow in FIG. 2B, the shaft 15 is urged to rotate counterclockwise about the pivot 15 as a rotation center. Accordingly, in FIG. 2A, the roller 22 is urged to rotate clockwise around the support shaft 15 and is urged so as to be constantly pressed against the peripheral surface of the impression cylinder 2. .
[0013]
One end of a lever 36 is pivotally attached to the other end portion of the support shaft 15, and an insertion hole 36 a drilled in the axial direction of the support shaft 15 is provided at the other end of the lever 36. A screw pin 37 with a hook is engaged. A bracket 38 is fixed to the frame 13 and is in contact with the lever 36 described above. The bracket 38 has an insertion hole 38 a corresponding to the insertion hole 36 a of the lever 36. Reference numeral 39 denotes a nut that engages with the screw pin 38, and reference numeral 40 denotes a wrench that is engaged with a recess at the other end of the lever 36. By operating the wrench 40, the support shaft 15 is rotated via the lever 36. It is comprised so that.
[0014]
In this manner, the support shaft 15 is rotated, the insertion hole 36a of the lever 36 is aligned with the insertion hole 38a of the bracket 38, and the screw pin 37 is engaged with both the insertion holes 36a and 38a. As a result, the cam follower 27 rotates in the clockwise direction against the elastic force of the compression coil spring 34 with the support shaft 15 as the rotation center in FIG. 2B, and is held at a position away from the cam 28. Reference numeral 41 denotes a support member that rotatably supports a substantially central portion of the support shaft 15 and is supported by a stay 42 fixed to the left and right frames 13 and 13 via brackets.
[0015]
Next, a paper transport operation in the sheet-like material transport device of the sheet-fed rotary printing press having such a configuration will be described.
The nut 39 is loosened in advance, the screw pin 38 is removed from the insertion hole 38 a of the bracket 38, and the roller 22 is pressed against the peripheral surface of the impression cylinder 2 by the elastic force of the compression coil spring 34. The paper conveyed by the gripper device 4 of the impression cylinder 2 and printed between the rubber cylinder 1 and the impression cylinder 2 is pressed against the peripheral surface of the impression cylinder 2 by the rollers 22, while the impression cylinder 2 and the discharge cylinder 8. At the contact point B, the gripper device 11 of the paper discharge cylinder 8 is replaced.
[0016]
At this time, a slack portion 6a occurs between the pair of contact points A and B as in the conventional case, and when the paper bottom portion 6b of the paper 6 passes through the contact point A, it is interposed between the rubber cylinder 1 and the paper 6. The paper bottom 6b follows the rotation of the rubber cylinder 1 and is pulled toward the rubber cylinder 1 by the viscosity of the ink. Here, between the slack portion 6a and the paper bottom portion 6b, the paper 6 is pressed toward the impression cylinder 2 by the roller 22, so that the paper bottom portion 6b is further pulled toward the rubber cylinder 1 due to the viscosity of the ink. Is regulated. Accordingly, since the slack portion 6a is not reduced, when the slack portion 6a is eliminated as in the prior art, the paper 6 is displaced from the peripheral surface of the impression cylinder 2 between the slack portion 6a and the paper bottom portion 6b. It is regulated that they are in sliding contact. For this reason, the printing surface of the paper 6 is prevented from being left with a mark due to scratches or rubbing, and the printing quality is improved.
[0017]
When adjusting the pressing force of the roller 22 against the impression cylinder 2, when the screw 24 is advanced with respect to the screw portion 23 in FIG. Since it rotates in the clockwise direction, the pressing force of the roller 22 is reduced. On the contrary, when the screw 24 is retracted with respect to the screw portion 23, the swinging member 19 rotates clockwise with the pin 20 as the rotation center, so that the pressing force of the roller 22 increases.
[0018]
Further, when the pattern or size of the paper 6 is changed and the position of the non-image portion is changed, the set screw 18 is loosened in FIG. When it is removed from the recess 15 a, the support member 17 can be moved in the axial direction with respect to the support shaft 15. Therefore, the roller unit 16 is moved left and right along the support shaft 15 so that the roller 22 corresponds to the non-image portion.
$
Although the delivery cylinder is the discharge cylinder 8, the transfer cylinder may be used, and the printing cylinder is the rubber cylinder 1, but a plate cylinder around which a relief plate, an intaglio plate, or the like is wound may be used. Further, although the rotating body is the roller 22, it may be a roller or a spherical body, and various design changes are possible.
[0019]
【The invention's effect】
As described above, according to the present invention, the sheet-like material that has been replaced by the holding claw device of the conveyance cylinder is between the contact point between the printing cylinder and the impression cylinder and the contact point between the conveyance cylinder and the impression cylinder. At the side of the impression cylinder by the rotating body. Accordingly, since the sheet-like material being conveyed is not displaced and slidably contacted with the impression cylinder, it is possible to prevent the sheet-like material from being left with marks due to scratches or rubbing, thereby improving the printing quality.
[Brief description of the drawings]
FIG. 1 is a front view showing an unfolded main portion of a sheet-like material transport device of a sheet-fed rotary printing press according to the present invention.
2A is a view taken in the direction of arrow II (a) in FIG. 1, and FIG. 2B is a view taken in the direction of arrow II (b) in FIG.
FIG. 3 is a side view for explaining a paper holding change between an impression cylinder and a transfer cylinder in a conventional sheet-fed rotary printing press.
FIG. 4 is a side view for explaining a paper holding change between an impression cylinder and a discharge cylinder in a conventional sheet-fed rotary printing press.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Rubber cylinder, 2 ... Impression cylinder, 3 ... Transfer cylinder, 4, 5, 11 ... Holding claw device, 6 ... Paper, 8 ... Paper discharge cylinder, 15 ... Support shaft, 16 ... Roller unit, 18 ... Set screw, DESCRIPTION OF SYMBOLS 19 ... Swing member, 22 ... Roll, 24 ... Screw, 27 ... Cam follower, 28 ... Cam, 34 ... Compression coil spring, 36 ... Lever, 37 ... Screw pin

Claims (1)

In a sheet-like material conveyance device of a sheet-fed rotary printing machine that replaces a sheet-like material printed between a printing cylinder and an impression cylinder from a holding nail device of the impression cylinder to a holding nail device of a conveyance cylinder,
The printing cylinder and the impression cylinder are biased to the impression cylinder side between the contact point of the printing cylinder and the transfer cylinder and the impression cylinder, and are separated when the gripper nail device of the impression cylinder faces each other. When the leading end of the sheet-like material is changed from the holding claw device of the impression cylinder to the holding claw device of the conveying cylinder and the sheet-like material passes through the contact point between the printing cylinder and the impression cylinder, the sheet shape A sheet-like material conveyance device for a sheet-fed rotary printing press, characterized in that a rotating body is provided that regulates that a material is pulled by a printing cylinder and the sheet-like material is in sliding contact with the peripheral surface of the impression cylinder .

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