JPH0266068A - Folding machine for rotary printing press - Google Patents

Abstract

PURPOSE:To carry out paper folding and paper feeding smoothly and surely irrespective of the quantity of making pages by providing a folding-roller supporting mechanism for supporting each folding roller movably in the longitudinal direction of a folding blade in the vicinity of a folding barrel and in the direction perpendicular to the longitudinal direction. CONSTITUTION:When there are many making pages, the thread shaft 14 of a folding-roller supporting mechanism is rotated to move a pair of blocks 31, 31' mutually in the opposite directions, swinging roller supporting arms 19, 19' around rotary shafts 21, 21' and increasing the interval S between a pair of folding rollers 7, 7' to carry out the paper feeding of sheets of cut and laminated paper 6. Then, by rotating the rotary shafts 21, 21' and eccentric shaft portions by the action of fluid pressure cylinders 28, 28', the folding rollers 7, 7' are lowered from a folding barrel 4, i.e., a folding blade 5, to make the component of pressing force act on the half folded portion of the sheets of cut and laminated paper to give a fold thereto. When the making pages are few, the gap between folding roller 7, 7' is reduced while lifting up the folding rollers 7, 7' toward the folding barrel 4 to give a fold to the half folded portion of the sheets of laminated paper.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a folding machine for a single rotary printing press.

(Prior Art) The folding machine of a conventional rotary printing press is explained with reference to FIG.
1) is a plurality of sheets of superimposed running paper, (2) is a pair of nipping rollers, (3) is a saw cylinder, (4) is a folding cylinder adjacent to the saw cylinder (3), and (5) is a folding cylinder. (4) is the folding blade installed, (6) is the cut polymeric paper, (7) (7'') is the folding roller installed directly below the folding cylinder (4), (9) is the same folding roller (7) The impeller placed below (7'), (
10) are monopolymerized on the paper discharge conveyor (1
) is cut by the saw cylinder (3) and the folding cylinder (4), and the folding cylinder (
4) in the direction of the folding roller (7) (7"), and when the center of the cut polymeric paper (6) moves to the open position of the folding roller (7) (7"), the folding cylinder ( 4
) is attached to the folding roller (7) (
7'), the cut polymeric paper (6) is folded in half by the same folding rollers (7) and (7'), and sent downward as it is. At this time, as shown in FIG.
Since it is difficult to crease a), stop the folding machine and adjust the position of the folding blade (5) as shown in Figure 5.

From the lower end of the folding blade (5) to the folding roller (7) (7'
) to the straight line connecting the center of rotation of the rollers (8°), while increasing the distance (S) and pressing force (F) between the folding rollers (7) and (7') according to the increase in straightness. Adjust. Furthermore, as shown in Fig. 6, if the cut polymeric paper (6) has few pages (few pages), creases are likely to form in the half-folded part (6a), so the folding machine should be stopped temporarily and the folding blade Adjust the position of (5) as shown in Figure 6, and set the distance from the lower end of the folding blade (5) to the straight line connecting the center of rotation of the folding rollers (7) (7') as shown in (A). At the same time, the spacing (S) and pressing force (F) of the folding rollers (7) (7') are adjusted in accordance with the decrease in the straightness. In addition, the cut polymeric paper (6), which has been folded in half as described above and is sent out from between the folding rollers (7) (7°), is dropped onto the impeller (9), and is further discharged from the impeller (9). The paper is dropped onto a paper conveyor (10) and transported to a post-processing process.

(Problems to be Solved by the Invention) Recently, the number of open pages of the cut polymeric paper (6) has increased, and there is a large difference in the number of pages between when there are many open pages and when there are few open pages. Therefore, if there are many tall pages.

Although the interval (S) between the folding rollers (7) (7') is changed according to the increase in the number of pages, the position of the folding blade (5) and the pressing force of the folding rollers (7) (7'') can be changed as the number of pages increases. If you leave the cut paper (6) in the state shown in Figure 6 and fold it in half, the leading edge of the outer paper will not be creased and that part will bulge out when the folding roller rolls. (7
) (7') in the direction of the impeller (9), it may collapse during post-processing, for example, when stacking in a stacking device. In addition, when passing between the folding rollers (7) (7'), an attempt is made to forcibly crease the leading edge of the double-folded cut polymeric paper (6) with many lines.
) (7') will only increase the force pushing the sides of the paper, and not only will the leading edge not be creased, but the folding rollers (7) and (7') will force the paper too much. The pressing damages the three papers and deteriorates the quality of the double-folded and cut polymeric paper (6).

Further, since the folding rollers (7) (7') strongly pinch the folding blade (5), the folding blade (5) is damaged. Also, contrary to the above, if there are few pages, the folding roller (7)
Although the distance (S) between the folding blades (5) and the folding rollers (7') are changed according to the decrease in the straight line
If the pressing force (7°) is kept at the state shown in Fig. 5 with many open pages, the folding blade (5) will fold the cut polymeric paper (6) with few open pages and move it to the rollers (7) (7'). There was a problem in that the paper could not be pushed into the gap, resulting in a single paper jam.

The present invention is proposed in view of the above-mentioned problems, and its purpose is to fold cut polymeric paper in half and create a crease at the leading edge, regardless of whether there are many or few pages. A rotary printing machine that can smoothly and reliably feed paper between folding rollers and prevent paper jams that occur during post-processing and damage to paper and folding blades that occur during folding. The point is that we are trying to provide a folding machine.

(Means for Solving the Problems) In order to achieve the above object, the present invention cuts a plurality of nine-folded sheets of running paper using a saw cylinder and a folding cylinder, and uses the same folding cylinder to cut a pair of folding rollers. When the central part of the cut polymeric paper moves to a position between the folding rollers, the folding blade provided on the folding drum protrudes between the folding rollers, and the cut polymeric paper is folded between the folding rollers. In the folding machine of a rotary printing press, which folds the paper in half using a folding roller and sends it out as is.

A folding roller support mechanism is provided that supports each of the folding rollers in the vicinity of the folding drum so as to be movable in a longitudinal direction of the folding blade and a direction orthogonal to the longitudinal direction.

(Function) The folding machine of the rotary printing press of the present invention is configured as described above, and when there are many pages, each folding roller is moved in a direction perpendicular to the longitudinal direction of the folding blade (the folding rollers are moved in a direction perpendicular to the longitudinal direction of the folding blade). While each folding roller is moved in the longitudinal direction of the folding blade (in the direction of separating it from the folding drum), the interval between each folding roller is widened to ensure one sheet feeding, and the pressing force F is increased. A component force F'' is applied to the half-folded part of the cut polymerized paper to ensure that a crease is made there.In addition, if there is little vertical line, each folding roller is set perpendicular to the longitudinal direction of the folding blade. direction (the direction in which the folding rollers approach each other), the interval between each folding roller is narrowed, and nine sheets are reliably fed, while each folding roller is moved in the longitudinal direction of the folding blade (in the direction in which the folding roller approaches move it,
Make sure to make a crease in the half-folded part of the cut polymeric paper.

(Example) Next, the folding machine of the rotary printing press of the present invention will be explained using an example shown in FIGS. A folding blade, (7) (7') is a pair of folding rollers disposed directly below the folding cylinder (4), (1
9) (19") is a roller support arm that rotatably supports the folding rollers (7) (7'); (14) is a screw shaft having a right-handed threaded portion (14a) and a left-handed threaded portion (14b); ,
(30) is a universal joint that connects the threaded shaft (14) and the rotational drive system, and (31) is the threaded shaft (14).
4), the block (31
') is a block screwed onto the left-hand threaded portion (14b) of the same threaded shaft (14), and one block (31) is the same block (
The other block (31') is attached to the lower part of the roller support arm (19) via the shaft (32) provided on the block (31) and the bear link (33), and the other block (31') is attached to the shaft (31') provided on the same block (31'). 32) and a bearing (33) to the lower part of the roller support arm (19'). Also, (23) is the frame, (21) (21°) is the same frame (23
), (22) (22") is the eccentric shaft part provided at the tip of the rotary shaft (21) (21'), and the eccentric shaft part (22) (22") is the eccentric shaft part provided at the tip of the rotary shaft (21) (21'). Support arm (1
9) (19"). This eccentric shaft portion (22) (22") is loosely fitted into the hole of the rotation shaft (21) (21').
) is eccentric by (e) with respect to the center. Also (25
) (25”) is fixed to the other end of the rotating shaft (21) (21゛) via a key (24) (2B)
(28°) is pinned to the frame (29) (29'”)
(27) (27)
) is the piston rod of the same fluid pressure cylinder (28) (28"), (26) (26") is the tip of the same piston rod (27) (27') and the lever (25)
(25') This is a pin that pivotally supports the lower end portion of (25').

Next, the operation of the folding machine of the rotary printing press shown in FIG. 1.2 will be explained in detail. The rotation of the rotary drive system is transmitted to the threaded shaft (14) via the universal joint (30), and the threaded shaft (14) is rotated, and the right-hand threaded portion (
14a) and the same threaded shaft (
14) The block (
31') in the approach/separation direction by the same distance.

Connect the roller support arm (19) (19″) to the rotation shaft (21) (
21') in the opening/closing direction to steplessly adjust the interval between the folding rollers (7) (7'').Furthermore, the fluid pressure cylinder (2B) (28') is operated in the expansion/contraction direction to The movement is controlled by the piston rod (27) (27') and pin (
26) (26') and the lever (25) (2
5') to rotate the one-rotation shaft (21) (21") and the eccentric shaft (22) (22"), and the roller support arm (
19) (19") in the vertical direction to steplessly adjust the vertical position of the folding rollers (7) (7'). In other words, when there are many vertical positions, the folding rollers (7) ( 7
While widening the interval (S) of 9 sheets to ensure that 9 sheets are fed, the folding roller (7) (7°) is lowered relative to the folding cylinder (4) and the component force F'( (see Figure 5) is applied to the half-folded part (6a) of the cut polymeric paper (6) to ensure that a crease is formed there. In addition, when there is little straightness, the interval (S) between the folding rollers (7) (7') is narrowed, and the folding rollers (7) (7') are raised toward the fold 111ii1 (4) to cut. Make sure to make a crease in the half-folded part (6a) of the polymeric paper (6).

Figure 3 shows a threaded rod (2B) (28°) and a handle (29) instead of the hydraulic cylinder (28) (2B').
) (29°) and a handle (29) (29'
) is used to rotate the threaded rod (28) (28°) to move the rod (27) (27') back and forth, and this embodiment also has the same effect as described above.

(Effects of the Invention) When the folding machine of the rotary printing press of the present invention has many straight lines as described above, each folding roller is moved in a direction perpendicular to the longitudinal direction of the folding blade (a direction that separates the folding rollers from each other). ) and widen the interval between each folding roller to ensure two-sheet feeding.

Each folding roller is moved in the longitudinal direction of the folding blade (in the direction away from the folding cylinder), and a component force F' of the pressing force F is applied to the half-folded portion of the cut overlapping paper to form a fold there. In addition, when there are few pages, each folding roller is moved in a direction perpendicular to the longitudinal direction of the folding blade (the direction in which the folding rollers are brought closer to each other), and the interval between each folding roller is narrowed to feed one sheet. While this is done reliably, each folding roller is moved in the longitudinal direction of the folding blade (in the direction of approaching the folding drum) to create a crease in the half-fold part of the cut polymerized paper, so even if there are many 5-fold pages, there are fewer. In addition, it is possible to smoothly and reliably carry out the folding process in which the cut polymeric paper is folded in half and creases the leading edge, and the paper is fed between the folding rollers. Damage to the paper or folding blade occurred.

This has the effect of preventing paper jams.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a folding machine of a rotary printing press according to the present invention, FIG. If) is a front view of the eccentric shaft part, FIG. 3 is a side view showing another embodiment, FIG. 4 is a side view showing a folding machine of a conventional rotary printing press, and FIG. FIG. 6 is an explanatory diagram of the operation when there are few standing pages, and FIG. 7 is an explanatory diagram showing the relationship between the folding roller, the folding blade, and the cut overlapped paper when there are many standing pages. (1)... Running paper, (3)... Saw cylinder, (4)...
Folded body. (5)...Folding blade, (6)...Cut polymeric paper, (
6a)...Half-folding portion, (7) (7'')...Folding roller. (19)-(33)...Folding roller support mechanism.

Claims (1)

[Claims] A saw cylinder and a folding cylinder cut multiple sheets of superimposed running paper, and the same folding cylinder transports the paper toward a pair of folding rollers, and the center of this cut overlapping paper moves to a position between the folding rollers. In a folding machine of a rotary printing press, a folding blade provided on a folding cylinder projects between the respective folding rollers, the cut overlapping paper is folded in half by the respective folding rollers, and the folding machine of the rotary printing press sends it out as it is. A folding machine for a rotary printing press, comprising a folding roller support mechanism that supports the folding roller movably in the longitudinal direction of the folding blade and in a direction orthogonal to the longitudinal direction in the vicinity of the folding cylinder.