JPH02103148A - Plate clamping apparatus - Google Patents

Abstract

PURPOSE:To easily mount and detach a plate with respect to a plate cylinder by a method wherein the plate cylinder is bent into a horizontal U-shape on the gripping and gripping end sides thereof while the notch part making the engagement and disengagement possible with respect to a gripping part, a gripper pressing leaf spring and a gripping end drawing-in leaf spring are provided to a tension bar. CONSTITUTION:A gripper pressing leaf spring 12, a gripping end drawing-in leaf spring 13 and a notch part 14 are provided to a tension bar 11. The gripper part 10a of a plate cylinder 10 is formed into an almost horizontal U-shaped cross-section and the gripping part 18a of a plate 18 is bent into an almost horizontal U-shaped cross-section and easily engaged with the gripper part 10a of the plate cylinder 10 in a freely detachable manner. When the tension bar 11 is rotated to the third position, the leading end part of the gripping part 18a is pushed in the leading end part of the gripper part 10a of the plate cylinder 10 by a gripper pressing leaf spring 12. A cylinder gripping end part 18b of the plate 18 is also bent into a horizontal U-shape and the leading end part thereof is hooked with the gripping end drawing-in leaf spring 13 at a point P and pulled downwardly by the rotation of the tension bar 11. At this time, the gripping end drawing-in leaf spring 13 comes to a point Q and tightens the plate 18 to fix the same.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a plate clamping device applied to a plate cylinder of a nine-rotary printing press.

(Prior Art) The plate tightening device applied to the plate cylinder of a conventional rotary printing press will be explained with reference to Figs. 6 to 9. (8) in Fig. 6 is a plate-shaped plate, and (8a) is The bite side of version (8).

(8b) is the butt side of plate (8), (1 in Fig. 7.8.9)
) is the plate cylinder, (la) is the gripping part of the plate cylinder (1), (lb)
is the bottom of the plate cylinder (1), (2) (2') is the plate cylinder (
1) frames on both sides rotatably supporting both ends of the shaft;
(3) is a gear attached to one shaft of the plate cylinder (1) during printing.

Rotation from a drive source (not shown) is transmitted to the plate cylinder (1) via the gear (3), and the plate cylinder (1) moves as indicated by the arrow (A) in Figures 8 and 9.
direction (normal rotation direction). Also(
4) is the tension bar, (4a) is the elongated groove provided in the tension bar (4), (5) is the axial notch groove provided in the plate cylinder (1), and (5a) is the notch groove (5). The side edge of the bite part (1a), (5b) is the circular hole part of the notch groove (5).

(6) (6°) is the bearer attached to both sides of plate 11ti (1).

(7) (7”) is an eccentric bushing, and the tension bar (4”) is an eccentric bushing.
) is slidably inserted into the circular hole (5b) of the notched groove (5).

Both ends of the tension bar (4) are eccentric bushes (?)
(7') are rotatably supported by the bearers (6) (6'), and by adjusting the position of the eccentric bushings (7) (7'), the outer peripheral surface of the tension bar (4) and the notch Department (
The gap (s) between the plate (5) and the edge (5a) is set according to the thickness of the plate (8), and the plate (8) is tightened to the outer peripheral surface of the plate cylinder (1). , when fixing.

The grip side (8a) of the plate (8) bent at an acute angle as shown in FIG.
a) into the edge (5a) of the notch groove (5), and then press the plate (8) against the outer peripheral surface of the plate cylinder (1) while moving the plate cylinder (1) in the direction of arrow (A). The plate (8) is wound around the outer circumferential surface of the plate cylinder (1) by one rotation in the normal rotation direction.

Then, as shown in Figure 8, the bottom side of the plate (8) (
8b) reaches the butt end (1b) of the plate cylinder (1).

Next, attach the bottom side (8b) of the plate (8) to the tension bar (
Insert the tension bar (4) into the elongated groove (4a) provided in 4) and then insert the tension bar (4) into the arrow EJ] (B) as shown in Figure 9.
Rotate in the direction and pull the end side (8b) of the first plate (8) into the notch groove (5) so that the first plate (8) is tightened and fixed on the outer circumferential surface of the plate cylinder (1). . When removing the plate (8) from the outer peripheral surface of the plate cylinder (1), rotate the tension bar (4) from the position shown in Figure 9 in the direction opposite to the arrow (A) and return it to the position shown in Figure 8. . Then, the 1st edition (8
) will rise, so pull out the bottom side (8b) of the first plate (8) from the elongated groove (4a) provided in the tension bar (4), and then move the plate cylinder (1) in the opposite direction to the arrow (A). 1
Peel off the plate (8) from the plate cylinder (1) while rotating it, and when the gripping side (8a) of the plate (8) bent at an acute angle reaches the position shown in Figure 8, the gripping side of the second plate (8) will be removed. (8a) from the edge (5a) of the notched groove (5).

The plate (8) is to be removed from the plate 11m (o).

(Problems to be Solved by the Invention) The conventional plate tightening device shown in FIGS. 6 to 9 has the following problem. That is.

(1) Version (8) is version 1! Iiii! When removing from (1).

Rotate the tension bar (4) from the position shown in Figure 9 in the direction opposite to the arrow (A) and return it to the position shown in Figure 8.

Lift up the plate (8) 9 and then press the bottom side of the plate (8) (
8b) in the tension bar (4).
), then peel off the plate (8) from the plate cylinder (1) while rotating the plate cylinder (1) once in the direction opposite to the arrow (^), and fold the plate (8) at an acute angle on the gripping side ( 8a) When the hand reaches the position shown in Figure 8, the bite side of the first version (8) (8a)
is pulled out from the edge (5a) of the notch groove (5), but in order to rotate the plate cylinder (1) with one sheet in the direction opposite to the arrow (A), the drive system must be turned so that the running sheet does not run backwards. It is necessary to disengage the clutch, and it takes time to remove the first plate (8).

(n) The gripping side (8a) of the plate (S)) bent into an m-square is firmly engaged with the gripping portion (1a) of the plate cylinder (1).

The bite side (8a) of the plate (8) is attached to the edge (5a) of the notch groove (5).
) is difficult to pull out.

(I [I) When tightening and fixing the plate (8) to the plate cylinder (1), as shown in Figure 8,
When plate b) reaches the butt end (lb) of the plate cylinder (1), insert the butt end side (8b) of the third plate (8) into the elongated groove (4a) provided in the tension bar (4). 1. Next, as shown in Fig. 9, rotate the tension bar (4) in the direction of arrow (B) and pull the end of the first plate (8) (8b) into the notch groove (5). Bite butt side (8b) of 1st edition (8)
A force in the direction of expansion acts on the plate, and the butt end side (8b) deforms in the direction of increasing the bending angle, making it difficult to reuse the first plate (8).

(IV) As mentioned above, the force in the expansion direction acts on the buttock side (8b) of the plate (8), and the bite butt side (8b) is deformed in the direction where the bending angle becomes thicker. Therefore, the same buttock side (8b)
is lifted from the outer circumferential surface of the plate cylinder (1) and does not come into close contact with the outer circumferential surface of the plate cylinder (1), causing plate breakage during printing. There was a problem in that it was necessary to pull in with great force to prevent floating.

The present invention has been proposed in view of the above-mentioned problems, and its purpose is to facilitate the installation and removal of the 9th plate from the plate cylinder. Versions can be reused. Another object of the present invention is to provide a plate tightening device that can prevent lifting of the bite side and the bottom side of the plate.

(Means for Solving the Problem) In order to achieve the above object, nine plate tightening devices of the present invention are provided.
The gripping part of the plate cylinder is formed into a substantially square cross section.

The gripping side of the plate that engages with the gripping portion of the same plate cylinder and the gripping end side of the plate that engages with the gripping end of the first plate cylinder are bent into a substantially U-shaped cross section. a notch that forms a space in the vicinity of a radially inner corner of the gripping portion to enable the gripping side of the plate to engage and disengage from the gripping portion;

A gripping plate spring that presses the gripping side of the plate in the direction of the gripping part of the plate cylinder and engages with an inner bent part on the gripping end side of the plate to move the gripping end side toward the gripping part of the plate cylinder. The tension bar is provided with a plate spring for pulling in the end of the printing plate cylinder in the direction of the end of the plate.

(Function) The plate tightening device of the present invention is configured as described above, and at the insertion position (position 1) on the side where the first plate is inserted.

Since one space formed between the gripping side of the plate and the gripping plate spring is maximized, the insertion of the gripping side of the first plate is facilitated. Furthermore, since the gripping side of the plate can be removed at this position, there is no need to reverse the first plate cylinder, and the third plate can be easily attached to and removed from the plate cylinder.

Further, since the bite side and the bottom side of the plate are formed in a substantially U-shaped cross section, the rigidity of one sheet metal body is increased and deformation of the one plate is prevented. Further, since the plate is fixed by the plate spring for holding down the plate and the plate spring for retracting the butt of the plate, deformation of the plate is also prevented from this point of view.

In addition, a force that pulls in the biting side of the plate acts between the biting plate spring and the biting side of the plate. Since it engages with the bent portion, lifting of the 9th plate is prevented.

(Embodiment) Next, the plate tightening device of the present invention will be explained with reference to an embodiment shown in Fig. 1.2.3. (10) is a plate cylinder, (11) is a tension bar; for.

No elongated groove (see (4a) in Figure 8.9) is provided. In addition, (12) is a leaf spring for holding down the bite, (13)
is the leaf spring for retracting the end of the bite, (14) is the notch, and these leaf springs for holding down the end of the bite (12), the leaf spring for retracting the end of the mouth (13), and the notch (14) are the tension bar (
11). Also, (10a) is Itama (1
In the barb part 0), the barb part (10a) is formed in a substantially U-shaped cross section. In addition, (18) is the plate, (18a) is the bite side of the same plate (18), and the bite side (18a) is bent into a roughly U-shaped cross section, and the bite side of the same plate (18). (1
8a) is adapted to be easily and detachably engaged with the gripping portion (10a) of the plate cylinder (10). Also on the same board (18
) is inclined by an angle α as shown in FIG. 5. Also, the bite side (1) of the same plate (18)
The inner dimension (L゛) of plate cylinder (10) is
0a)', and when the tension bar (11) rotates to the third position described later, the gripping part (1) of the plate (18) is inclined by an angle α.
The tip of the plate 8a) is firmly pushed into the tip of the loa of the plate cylinder (10) by the loaf spring (12). In addition, (18b) is the end of the bite side of the plate (18), and the end of the end of the bite (18b) is also bent into a substantially U-shaped cross section, and its tip is used for retracting the end of the bite at point (P). Hooked on the leaf spring (13), the tension bar (1
1) is pulled down by rotation in the direction of arrow (B). At this time, the leaf spring (13) for retracting the end of the bite is 1
The inclination angle (
Move along β) and come to point (Q), 1st version (18)
Tighten and secure firmly. In addition, the tension bar (1
Even if the center part of 1) is slightly lifted, the gripping plate spring (1)
There is no change in the tightening force on the biting side (18a) and the biting butt side (18b) due to 2) and the biting butt retracting leaf spring (13). The tension bar (11) has three positions. Position 1 is shown in FIG. 1, position 2 is shown in FIG. 2, and position 3 is shown in FIG. Position 1 in Figure 1 is the bite side (1) of the 1st version (18).
8a) into the gap (10c) of the plate cylinder (10), and when the plate is removed to replace the already installed plate (18), the gripping side (18a) of the fifth plate (18) has a notch ( 1 (14a) of the plate cylinder (lO)
Removed from 10a) and the buttock side (18b) of the 1st version (18)
(See the broken line) shows a state where it is fixed by the buttock retraction leaf spring (13). Tension bar (
The shoulder (14a) of the notch (14) of 11) is the plate cylinder (10)
It comes to the lower end (10a') of the bite part (10a) of 9.
The tip (18a') of the bite side (18a) of the plate (18) is pushed out to the same 7fi (14a), and the lower end (10a)
') is a little far away. Therefore, in this state, the 9th edition (18th edition)
) can be removed. In addition, the gripping side (18a) of the plate (18) is connected to the gripping portion (18a) of the plate cylinder (10).
10a), use the tension bar (ll)
must be turned to position 2 in Figure 2. In addition, in position 1, the leaf spring for holding down the bite (12) and the leaf spring for retracting the butt of the bite (13) are in the position shown in Fig. 1,
The leaf spring for holding down (12) is on the holding side (18) of the 8th edition (18).
18a), and the insertion space (s) on the bite side (18a) is maximized. In addition, the leaf spring (13) for retracting the end of the bite is attached to the end of the end (10b) of the first version cylinder (10).
The buttock side (18b) of the 1st version (18) is bent by 1.
) is located at the point (Q) at the tip of the 1st version (18) on the buttock side (
18b) is fixed. In addition, at position 2 in Fig. 2, the shoulder (1) of the notch (14) of the tension bar (11) is
4a) creates a space in which the tip of the gripping side (18a) of the plate (18) can be easily inserted.
) is formed between the lower end (10a') of the tension bar (11) and the outer peripheral surface of the tension bar (11), so it is separated from the lower end (10a').

On the other hand, the gripping plate spring (12) is in a position to lightly press the gripping side (lea) of the 9th plate (18).
When inserting the butt end side (18b) of 18) into the gap (10c), the leaf spring (13) for retracting the end of one bite is inserted into the plate (18).
) is near the point (P) where you lightly press the tip of the buttock side (18b) of the plate (18), so at this position 2 remove the tension bar (11
) is further turned to position 3 in Fig. 3, the shoulder (14a) of the notch (14) of the tension bar (11) moves from the lower end (10a') of the gripping part (10a) of the plate cylinder (lO). further away.

The gripping plate spring (12) is attached to the gripping side (1) of the plate (18).
8a), and then tighten the leaf spring (13) for retracting the end of the bite.
) comes to point (Q) at the tip of the end of the plate (18b), and the end of the end (18b) of the first plate (18) is fixed.

FIG. 4([)(II) shows another embodiment.

(1) is the same plate cylinder as the conventional one, that is, the plate cylinder has an acute angle at the gripping part (1a), (21) is the tension bar, and (2B) is the plate.

The tension bar (21) has the buttock side of the 9th edition (28) (
A leaf spring (23) for retracting the butt end is attached to retract and fix the retractor 28b). At the plate tightening position described later.

When the buttock side (28b) of the plate (28) is inserted through the gap (lc), the buttock retraction plate b'b (2
3) does not hit the buttock side (28b) of the plate (28),
As the tension bar (21) is turned in the direction of the arrow (B) (board fixing direction), the biting end side (28b) of the 9th edition 88) (
P) Touch at a point.

When fixing the bottom side (28b) of the plate, it is positioned at point (Q), as in the first embodiment.

In this embodiment, the tension bar (21) has two positions, one of which is the insertion of the first plate (see Fig. 4 (I)).
, the other is that the 1st plate is fixed (see Figure 4 (n)). In the 0th plate insertion position, the gripping side (28a) of the 1st plate (28) is hooked on the acute-angled gripping part (1a) as before. and fixed. Therefore, the removal of the plate (28) is.

At the plate insertion position, first remove the butt end (28b) of the plate (2B), rotate the third plate cylinder (1) in the opposite direction to the arrow (A), and remove the ninth plate (28). Place the tension bar (21) at the plate insertion position, - pull out the biting end side (28b) of the placing plate (28) and insert the biting side (28b) of the first plate (28).
28a), reinsert the butt end side (28b) of the 9th plate (28), rotate the tension bar (21) to the plate fixing position, and insert the butt end side (28b) of the 9th plate (28). After fixing.

Rotate the plate cylinder (1) forward in the direction of arrow (A) to make the first plate (28)
Remove.

(Effects of the Invention) As described above, in the plate clamping device of the present invention, at the plate clamping side insertion position (position 1), a space is formed between the clamping side of the second plate and the clamping plate spring. is maximized, making it easier to insert the second version on the bite side.

Further, since the gripping side of the plate can be removed at this position, there is no need to reverse the third plate cylinder, and the ninth plate can be easily attached to and removed from the plate cylinder.

Further, since the bite side and the bottom side of the plate are formed in a substantially U-shaped cross section, the rigidity of the nine sheet metal bodies is increased and deformation of the first plate can be prevented. Further, since the plate is fixed by the plate spring for holding down the plate and the plate spring for retracting the butt of the plate, deformation of the plate can be prevented from this point as well, and the plate can be reused.

In addition, a force that pulls in the biting side of the plate acts between the biting plate spring and the biting side of the plate. Since it engages with the bent portion, it has the effect of preventing the 8th plate from lifting up.

[Brief explanation of drawings]

1.2.3 is a side view showing one embodiment of the plate tightening device according to the present invention, FIG. 4 (I) (■) is a side view showing another embodiment, and FIG. 2.3 is a side view showing the plate shown in FIG. 6 is a side view showing a conventional plate, and FIG. 7 is a front view showing a conventional plate tightening device. FIG. 8.9 is an explanatory diagram of its operation. (lO)... plate cylinder, (lOa)... gripping part of plate cylinder (lO). (10b) ... The butt part of the plate cylinder (lO), (1
1) ...Tension bar, (12) ...
Leaf spring for holding down. (13)...Plate spring for retracting the end of the bite, (14)
...Notch, (18)...plate, (18a)...
The bite side of the plate (18), (18b)...the bite butt side of the plate (18).

Claims (1)

[Claims] The gripping portion of the plate cylinder is formed to have a substantially square cross section, and the gripping side of the plate engages with the gripping portion of the plate cylinder, and the gripping end side of the plate engages with the gripping end of the plate cylinder. is bent to have a substantially U-shaped cross section, and a space is formed near the radially inner corner of the gripping portion of the plate cylinder to enable the gripping side of the plate to engage and disengage from the same gripping portion. The notch, the gripping plate spring that presses the gripping side of the plate toward the gripping portion of the plate cylinder, and the plate spring that engages with the inner bent portion of the gripping end side of the plate to press the gripping side of the plate toward the gripping portion of the plate cylinder. A plate tightening device characterized in that a tension bar is provided with a plate spring for pulling the butt end of the plate cylinder toward the butt end of the plate cylinder.