JPH0418851Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a paper guide provided along the circumference of a printing cylinder in a sheet-fed rotary printing press to suppress flapping of paper that is conveyed by being held in a claw. It is related to the device.

[Conventional technology]

A sheet-fed rotary printing press has a plate cylinder equipped with a printing plate,
An inking device and a water supply device that supply ink and water to the printing plate, and a rubber cylinder that transfers an image formed on the printing plate with the ink and water to the blanket surface.
It is equipped with an impression cylinder that rotates in opposition to the rubber cylinder,
An image is transferred from the blanket cylinder to the paper conveyed by the impression cylinder's claws, and printing is applied to the paper as it passes between the impression cylinder and the blanket cylinder.

When printing with such a sheet-fed rotary printing press,
When the gripping end of the paper, which is held in the impression cylinder's claw and is conveyed by the rotation of the cylinder, enters between the cylinder and the blanket cylinder and printing starts, the part of the paper other than the gripping end is not held. Because of this, when the paper is transported at high speed, it flaps around, causing the paper to get dirty or damaged.

Conventionally, therefore, a plurality of paper guides formed in an arc shape along the circumferential surface of the impression cylinder are provided slightly apart from the circumferential surface to hold down the conveyed paper so that it does not flap. In this case, 2 of the multicolor printing press
For printing units after colors, the side of the paper guide will be the printing side of the paper that has already been printed on, so move the paper guide in the axial direction on the stay without touching the pattern area and press the blank area of the printing paper. It corresponds to

[Problem that the invention attempts to solve]

However, in such conventional paper guide devices, the paper guide holder is fitted into a square stay with rotation restricted, and the paper guide holder is configured to be moved by loosening the knob. There was a problem that blurring occurred, and that it took time to move the paper guide within the narrow operating space each time the printing plate was replaced or the impression cylinder was cleaned, resulting in extremely poor operability.

[Means for solving problems]

In order to solve these problems, in the present invention, a paper guide holder that supports the paper guide is fitted to the stay side so that it can move forward and backward in the axial direction, and a pinion shaft with a knob is attached to this paper guide holder to rotate and move forward and backward. In addition to freely supporting the pinion, the pinion on the pinion shaft meshes with a rack supported on the stay side and extending in its longitudinal direction, and the pinion and rack are configured to mesh or disengage as the pinion shaft moves back and forth. did.

[Effect]

By grasping the knob and pushing the pinion shaft, the pinion and rack will be disengaged and the paper guide holder will be movable, allowing it to be moved a large distance.Then, by pulling the pinion shaft, the pinion and rack will mesh. By rotating the pinion shaft while gripping the knob, the paper guide holder is moved little by little for fine positioning.

〔Example〕

1 to 3 show an embodiment of the paper guide device according to the present invention, and FIG. 1 is a longitudinal sectional view thereof, and FIG.
The figure is a sectional view along line AA in Figure 1, and Figure 3 is a schematic side view of a two-color sheet-fed rotary printing press that implements this. In the figure, each printing unit 2, 3 of the printing press 1 is
A plate cylinder 4 on which a printing plate is attached, an inking device and a water supply device (not shown), a blanket cylinder 5 that transfers the image on the plate to a blanket surface, an impression cylinder 6 of double diameter that is in contact with the blanket cylinder 5, and both It is equipped with a transfer cylinder 7 that is in contact with the impression cylinder 6 and a paper discharge cylinder 8 that is in contact with the impression cylinder 6 for the second color. It is located and arranged. Further, a paper ejection chain 12 is stretched between a sprocket 11 provided coaxially with the paper ejection cylinder 8 and a sprocket of a paper ejection section (not shown).

A square stay 13 is supported diagonally above the impression cylinder 6 between the left and right frames of the printing unit 3, and a pair of brackets 14 are secured with bolts 35 near the frames on both sides of the square stay 13. Fixed and hanging. Reference numeral 15 is a rail having an approximately inverted L-shaped cross section, which is supported by fixing both ends to the left and right brackets 14 with bolts 16, and a rack 17 having approximately the same length as the rail has teeth on the inner step. It is fixed on the lower side, and a scale plate 18 extending almost the entire length is attached to the front surface. rail 1
A plurality of paper guide holders, generally designated by reference numeral 19, are fitted into 5 so as to be able to move forward and backward in the axial direction of the cylinder, and this paper guide holder 19 is divided into a front plate 20, a rear plate 21, and a bearing plate 22. It is formed. That is,
The rear plate 21 has a substantially L-shaped cross section, and its upper end flange 21a is slidably attached to the corner of the rail 15, and the space between the flange 21a and the lower end bottom plate 21b is as follows. A circular opening 21d is opened leaving the guide holding portion 21c. Further, the front plate 20 is formed into a rectangular plate shape, and its lower end and bottom plate 21b are fixed with bolts 23, and the front plate 20 and the vertical member of the flange portion 21a slide on the rail 15 from the front and back. It is held in a movable manner. Further, the bearing plate 22 is formed into a rectangular plate shape, and is slidably held between the lower end surface of the rail 15 and the upper surface of the bottom plate 21b, so that the rail 15 is a horizontal member of the flange portion 21a. and the bottom plate 21b so as to be slidable from above and below. Reference numeral 24 denotes a paper guide integrally formed with a guide main body 24a formed in an arc shape substantially concentric with the impression cylinder 6, and dogleg-shaped legs 24b perpendicular to the guide main body 24a, and the legs 24b are used to hold the guide. The guide body 24a is inserted and fixed into the guide hole of the portion 21c.
It is positioned along the impression cylinder 6 with a slight gap between it and the outer peripheral surface. Furthermore, bearing plate 2
A pinion shaft 26 having a knob 25 at the tip thereof is rotatably supported in the shaft hole provided in the paper guide holder 19 so as to be freely advanced and retracted. Pinion 27 meshing with 17
is fixed with a key 28 and a nut 29. Further, a compression coil spring 30 is inserted between the knob 25 and the bearing plate 22 and guided by a hole in the front plate 20 and a collar 31.
2 and 2 are fired so as to separate them from each other. 32
is a pointer fixed to the front plate 20 and corresponds to the scale plate 18, and 33 is a pointer screwed into the flange portion 21a of the paper guide holder 19 and attached to the paper guide holder 1.
This is a bolt with a knob that fixes the rail 9 to the rail 15.

The operation of the paper guide device of the printing press configured as above will be explained. The paper 34 fed one by one onto the differential plate 10 from a paper feeding device (not shown) is caught by the claws of the swing device 9, then transferred to the claws of the impression cylinder 6, and conveyed by the claws to the rubber cylinder. 5 and the impression cylinder 6, the first color is printed. Furthermore, this paper 34 has an impression cylinder 6 of the first color, a transfer cylinder 7,
The impression cylinders 6 of the second color are held in their claws and conveyed in order, and after the second color printing is applied between the second color blanket cylinder 5 and the impression cylinder 6, the sheets are conveyed by the paper discharge chain 12. Paper is ejected. In this case, the paper 34 attached to and conveyed by the impression cylinder 6 of the second color tries to flap because it is not held at the edge other than the gripped end. Since they are arranged in parallel, the paper 34 is conveyed while being pushed and guided by these, so it does not flap around.

In such printing work, for example, when cleaning the impression cylinder 6, note the position of each paper guide holder 19 by reading the corresponding scale on the scale plate 18 and pointer 32, and then loosen the bolt 33. Later snack 2
5 and compress the pinion shaft 26 by compressing the coil spring 3.
When pushed against the elastic force of 0, the pinion 27 moves to the chain line position in Figure 1 and disengages from the rack 17. If you continue to hold the knob 25 and move it sideways, the paper guide The holder 19 moves largely along the rail 15. After all the paper guides 24 are moved close to the frame where they do not interfere with the work, the cleaning work is performed. In addition,
After moving the paper guide 24, when the knob 25 is released, the pinion shaft 26 returns to the illustrated position by the elastic force of the compression coil spring 30, and the pinion 27 meshes with the rack 17.

After cleaning, as described above, while pressing the knob 25, move each paper guide 24 approximately to the previous position and release the hand, and the pinion 27 will mesh with the rack 17 by the elastic force of the compression coil spring 30. . When the knob 25 is grasped and rotated, the paper guide holder 19 moves gently while the pinion 27 engages and rolls on the stationary rack 17.
If the rotation of the knob 25 is stopped when the pointer 32 points to the scale noted down, the paper guide 24 is correctly positioned at the position before the cleaning operation. In this case, the movement of the paper guide 24 is carried out smoothly without hesitation because the pinion 27 and the rack 17 are engaged with each other. Although the paper guide holder 19 can be securely fixed after positioning using the bolt 33, the compression coil spring 3 does not need to be tightened.
Since the stepped portion of the pinion shaft 26 is pressed against the end surface of the bearing plate 22 by the zero elastic force and a frictional force is exerted, this alone is sufficient and there is no fear that the paper guide 24 will move.

The above description has been made regarding the case of cleaning the impression cylinder 6, but when replacing the printing plate, etc., the coarse adjustment by pressing the knob 25 and the fine adjustment by rotating the knob 25 can be combined as appropriate. By implementing this and using the scale plate 18, the paper guide 24 can be easily positioned in a short time.

[Effect of idea]

As is clear from the above explanation, according to the present invention, in a paper guide device for a sheet-fed rotary printing press, a paper guide holder that supports a paper guide is fitted to the stay side so as to be movable in the axial direction. A pinion shaft with a knob is supported by the holder so that it can rotate and move forward and backward, and the pinion on this pinion shaft is engaged with a rack that is supported on the stay side and extends in its longitudinal direction, and the pinion is moved forward and backward by the pinion shaft. By arranging the structure so that the pinion and the rack are engaged and disengaged, when the pinion shaft is pushed, the engagement between the pinion and the rack is released, allowing the paper holder to move smoothly and largely along the stay side. By rotating the shaft without pushing it, the pinion and rack engage with each other and the paper holder can be smoothly moved minute by little along the stay side, improving operability and making positioning possible in a short time. It is possible to improve productivity and reduce the amount of paper waste.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the paper guide device for a sheet-fed rotary printing press according to the present invention, FIG. 1 is a longitudinal sectional view thereof, FIG. 2 is a sectional view along AA of FIG.
The figure is a schematic side view of a two-color sheet-fed rotary printing press that implements this method. 6... impression cylinder, 13... stay, 15... rail, 17... rack, 19... paper guide holder,
20...front plate, 21...rear plate, 22...bearing plate,
24... paper guide, 25... knob, 26... pinion shaft, 27... pinion.

Claims (1)

[Scope of utility model registration request] A stay that is close to the circumferential surface of the printing cylinder and supported in parallel with its axis; a paper guide holder that is fitted to the stay so that it can move forward and backward in the axial direction; A paper guide formed in a substantially concentric arc shape, a rack supported on the stay side and extending in the longitudinal direction thereof, a pinion shaft with a knob supported on the paper guide holder so as to be rotatable and movable back and forth; 1. A paper guide device for a sheet-fed rotary printing press, characterized in that a pinion is mounted on a pinion shaft and meshes with the rack, and is disengaged from the rack by pressing the pinion shaft.