JP2000016690A - Paper pulling device for rotary press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of dirt on a spread surface and pull both inner and outer papers stably and satisfactorily when there is multi-colored printing over two pages in succession on the spread surface at many pages. SOLUTION: Left and right paper pressing means 10a, 10b are provided by attaching them to tips of left and right arms 4a, 4b, the paper pressing means is provided with a pair of pressing rollers 11, 12 which roll by pressing an outermost face of a plurality of continuous papers 3 (3a,..., 3n) which are wound around an outer peripheral face of a drag roller 2 and run in the direction of the outer peripheral face of the drag roller 2 and a pressing belt 14 wound around the pair of pressing rollers, and the pair of pressing rollers 11, 12 are arranged along the peripheral direction of the drag roller 2. The pressing belt 14 slides in the direction of running of the continuous paper 3 by pressing the outermost face of a plurality of continuous papers 3 which are wound around the outer peripheral face of the drag roller 2 and run against the outer peripheral face of the drag roller 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper drawing device for drawing continuous paper printed by a printing unit of a rotary press into a folding section.

[0002]

2. Description of the Related Art Generally, in a rotary press, continuous paper printed by a printing unit is pulled by a paper pulling device provided at the entrance of a triangular plate of a folding section, fed into the triangular plate, vertically folded, and then cut and folded by a cutting / folding device. It is cut to a predetermined size, folded and discharged outside the machine.

FIGS. 6 and 7 are a front view and a side view showing a typical example of a conventional paper drawing device at the entrance of a triangular plate of a newspaper rotary press, respectively. The paper drawing device includes a drag roller 2 disposed at an entrance of a triangular plate 1 of the rotary press and driven to rotate at a peripheral speed slightly higher than a plate cylinder.
Of continuous paper 3 printed on the outer peripheral surface of the
, 3n) A detachable paper pressing roller 2 that presses the upper surface of (3a,..., 3n) at three locations at both edges and the center in the paper width direction.
1a, 21b, 21c, and these paper pressing rollers 21
a, 21b, and 21c, and a driving device 6 that drives the drag roller 2 to rotate at substantially the same peripheral speed.

In such a conventional paper drawing apparatus, the drag roller 2 rotating and the paper pressing rollers 21a, 21
After passing a plurality of continuous papers 3 that have been printed and sent to the folding section in an overlapped state between the paper rollers b and 21c, these detachable paper pressing rollers 21a, 21b and 21c are connected to the drag roller 2. When the air cylinder 5 is put on the air cylinder 5, the paper pressing rollers 21a, 21b, 21c are mounted on the corresponding arms 4a, 4b, 4c.
, A plurality of continuous papers 3 superposed on the outer peripheral surface of the drag roller 2 are pressed. Since the drag roller 2 and the paper pressing rollers 21a, 21b, 21c rotate in a direction to feed out the paper at a peripheral speed slightly faster than the plate cylinder, a plurality of paper rollers sandwiched between the drag roller 2 and the paper pressing rollers 21a, 21b, 21c. The continuous paper 3 is simultaneously pulled toward the triangular plate 1 of the folded portion.

[0005] Such a conventional paper pressing roller 21a,
21b, 21c are disk-shaped rolling elements made of hard synthetic rubber or plastic, fixed to a roller shaft 23, and each arm 4a, 4b, 4 rotatably supporting the roller shaft 23. 4c is hung on the drive shaft 9 of the drive device 6, and is detachable from the drag roller 2 via the air cylinder 5. Also, the paper holding roller 21
a, 21b, and 21c are non-printed portions that are margins outside the ruled lines of the newspaper for normal newspaper printing, that is, FIG.
As shown in FIG. 9A, the paper pressing rollers 21a, 21b, and 21c are provided at three positions on both edges and the center of the paper width, as shown in FIG.
Is strongly pressed locally in a state close to line contact.

[0006] On the other hand, with the recent increase in the number of colors of printed materials, recent newspaper printing uses a wide version for the spread side of a multi-page newspaper.
The number of cases of performing multi-color printing of a continuous page has been increasing. In this case, the paper pressing rollers 21a, 21b, 21c
As shown in FIG. 8B, when the paper is pressed at three places as usual and the paper pressing roller 21c at the center position is put on,
As a result of the central stamping surface of the facing surface being strongly pressed by the paper pressing roller 21c against the outer peripheral surface of the drag roller 2 in a state close to local line contact, stains are generated on the stamping surface and the quality of multicolor printing is seriously impaired. Therefore, in order to prevent the stain on the stamp surface, as shown in FIG. 8 (C), the paper pressing roller 21c at the center is removed and the operation is performed by pressing only the both edges of the paper width.

As another example at the entrance of the triangular plate 1, as shown in FIG. 10, instead of using the above-mentioned paper pressing roller made of a disk-shaped rolling element, instead of using the paper pressing roller 34, the pressing belt 34 is connected to the outer peripheral surface of the drag roller 2. A method of pressing the pressure is disclosed in Japanese Utility Model Laid-Open No. 6-83663.

[0008]

However, in the conventional paper drawing apparatus described above, when printing multiple pages using a wide printing plate on the facing surface, if a roller system is used, the paper pressing roller at the center position of the paper width is used. When the belt 21 is removed or the belt system is used, the holding belt 34 is placed at the center position.
If the sheet is not attached, dirt at the center of the spread surface using the wide plate is eliminated, but when the number of continuous papers 3 to be superimposed on the outer peripheral surface of the drag roller 2 increases, the middle paper Poor pulling makes it difficult to adjust the paper tension, and the paper flow and the difference in tension between the inner and outer paper on the triangular plate 1 make the folding accuracy unstable and cause wrinkles.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems. In the case where there are two pages of multi-color printing on a two-page spread surface, dirt does not occur on the two-side spread surface, and furthermore, the inner and outer paper It is an object of the present invention to provide a paper holding means of a paper drawing apparatus capable of obtaining stable and good paper drawing.

[0010]

In order to achieve the above object, the present invention comprises a drag roller disposed at the entrance of a triangular plate and driven to rotate at a peripheral speed somewhat higher than the plate cylinder. In a paper press of a rotary press, which presses and pulls a plurality of continuous papers printed and superimposed on an outer peripheral surface, a paper presser is provided at an end of an arm, and the paper presser is provided on an outer peripheral surface of the drag roller. It comprises a plurality of pressing rollers that roll while pressing the outermost surfaces of the plurality of continuous papers running around in the direction of the outer peripheral surface of the drag roller, and a pressing belt wound around the plurality of pressing rollers. The plurality of press rollers are arranged along the circumferential direction of the drag roller, and the press belt is wound around the outer peripheral surface of the drag roller and the plurality of continuous papers run. The outermost surface, characterized in that slide in the traveling direction of the continuous paper while pressed against the outer peripheral surface of the drag rollers. In addition, a driving device that slides the pressing belt in the running direction of the continuous paper at substantially the same peripheral speed as the drag roller may be provided, and a mounting position of the plurality of pressing rollers with respect to the tip of the arm is adjusted in the front-rear and vertical directions. May be provided.

[0011]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the first embodiment of the present invention.
FIG. 2 is a front view showing an arrangement of the paper drawing apparatus according to the embodiment, and FIG. 2 is a side view of FIG. In this paper drawing device, a triangular plate 1 is disposed at the entrance of a folding section of a rotary press, a drag roller 2 is disposed in parallel along the upper side of the triangular plate 1, and a plurality of continuous papers 3 (3a,..., 3n) are provided. They are printed, overlaid and sent.

The triangular plate 1 is disposed obliquely downward and forward with respect to the running direction of the continuous paper 3. The drag roller 2 is driven to rotate at a peripheral speed somewhat higher than that of the plate cylinder. The plurality of continuous papers 3
There is a continuous paper 3a on the outermost side and a continuous paper 3n on the innermost side when the paper is sent while being overlapped and wound around the outer peripheral surface of the drag roller 2.

Further, the paper pulling device includes a drag roller 2.
Left and right arms 4 (4a, 4b) rotatable above the
There is a paper holding means 1 attached to the tip of the arm 4
0 (10a, 10b), the paper pressing means 10 has a pair of pressing rollers 11, 12 and a pressing roller which is wound around the pair of pressing rollers 11, 12 and slides in the running direction of the continuous paper 3. And a driving device 6 for sliding the holding belt 14 in the running direction of the continuous paper 3 at substantially the same peripheral speed as the drag roller 2, and a mounting position of the pair of holding rollers 11, 12 with respect to the tip of the arm. And a position adjusting means 20 for vertical adjustment.

The pair of arms 4a and 4b are rotatably hung on a driving shaft 9 of a driving device 6, and a paper pressing means 10 is mounted at the tip thereof. A pair of pressing rollers 11, 1 of the pressing means 10
2 and the holding belt 14 are detachable from the drag roller 2.

In the air cylinder 5, the tip of the protruding rod 5a is pin-joined to an intermediate portion between the corresponding arms 4a and 4b, and the corresponding arms 4a and 4b are rotated by the movement of the rod 5a. This is for attaching / detaching / pressing the paper pressing means 10 to / from the drag roller 2.

The driving device 6 has a driving shaft 9, a driving pulley 8 a fixed to the driving shaft 9, a driven pulley 8 b to be described later on the paper pressing means 10 side, and these pulleys 8 a, 8 b
The pressing belt 14 is wound via the driving belt 7
Is driven in the running direction of the continuous paper 3 at substantially the same peripheral speed as the drag roller 2.

The paper pressing means 10a and 10b are applied to the entrance of the folding section of a newspaper rotary press, and as shown in FIGS. 1 to 4, a pair of front and rear rollers which roll while pressing the continuous paper 3 on the outer peripheral surface of the drag roller 2. Pressing rollers 11 and 12, a driving roller 13 driven to rotate at substantially the same peripheral speed as the drag roller 2, and a pair of the pressing roller 1 and the driving roller 13.
The pressing belt 14 is wound around the outer peripheral surface of the drag roller 2, and slides in the running direction of the continuous paper 3 while pressing the surface of the continuous paper 3.

A pair of front and rear pressing rollers 11 and 12 are provided in an area where the continuous paper 3 contacts the outer peripheral surface of the drag roller 2.
That is, in the area between the position P1 and the position P2 shown in FIG. Also, a pair of holding rollers 11, 1
3 is rotatably supported by roller shafts 17 fastened to the respective mounting brackets 15 and 16, as shown in FIGS.

As shown in FIGS. 3 and 4, the drive roller 13 uses an eccentric bushing 19 for belt tension inserted in each arm 4 and is rotatably supported by the eccentric bushing 19. It is fixed to one end of the shaft 18.
A driven pulley 8b is fixed to the other end of the intermediate shaft 18, and the driving belt 7 of the driving device 6 is wound around the driven pulley 8b.

The position adjusting means 20 attaches the pair of pressing rollers 11 and 12 to the individual fittings 15 and 16,
The individual mounting brackets 15 and 16 are arranged at an interval in the circumferential direction of the drag roller 2 with respect to the front-rear and up-and-down directions.
The mounting brackets 15 and 16 are fastened to the distal end of the arm 4 by screwing in a plurality of bolts 26 inserted into the pair 16a, and the mounting holes 15a and 16a are provided between the pair of holding rollers 11 and 12 by the elongated holes 15a and 16a. The distance can be changed and the position in the front-back and up-down directions can be adjusted.

The operation of the paper drawing device according to the first embodiment of the present invention will be described. After a plurality of continuous papers 3 sent from the paper feed unit of the rotary press via the printing unit are overlapped on the outer peripheral surface of the drag roller 2, the continuous paper 3 is threaded,
When the paper holding means 10 is brought into a state of being attached to the drag roller 2, the respective detachable air cylinders 5 are operated,
The respective arms 4a and 4b descend, and the drag roller 2
The pressing rollers 11 and 12 press the both edges of the upper surface of the continuous paper 3 on the outer peripheral surface from above the pressing belt 14. Then, the surface of the pressing belt 14 between the pair of pressing rollers 11 and 12 is curved along the curved surface of the continuous paper 3a on the outer peripheral surface of the drag roller 2 between the positions P1 and P2 as shown in FIG. A plurality of continuous papers 3 overlapping with the outer peripheral surface of the drag roller 2 in a state of surface contact;
Press both edges.

Therefore, as described above, unlike the conventional roller method in which the continuous paper 3 is strongly pressed locally in a state close to line contact, in this embodiment, the continuous paper 3 is applied to the outer peripheral surface of the drag roller 2. Pressing with a large area,
If the same pressing force as that of the conventional paper pressing roller 21a or the like is applied, the pressing force per unit area becomes extremely small, and a very large pressing force can be obtained.

In this state, when the operation of the rotary press starts,
When the driving device 6 is operated, the driving pulley 8a, the driving belt 7
And the driving roller 13 rotates via the driven pulley 8b,
Since the pair of holding rollers 11 and 12 and the holding belt 14 rotate together with the drag roller 2 in the direction of sending out the continuous paper 3 at a peripheral speed somewhat faster than the plate cylinder, a plurality of continuous rollers sandwiched between the drag roller 2 and the holding belt 14 are provided. The paper 3 is strongly pulled with the inner and outer papers evenly stretched,
It is sent out on the triangular plate 1.

According to the paper drawing device according to the first embodiment of the present invention, the paper pressing means 10 includes a pair of front and rear pressing rollers 11 and 12 and these pressing rollers 11 and 12.
Has the following effects because of having the holding belt 14 wound around. A roller system for locally pressing the continuous paper 3 on the outer peripheral surface of the conventional drag roller 2 shown in FIGS. 6 and 7 in a state close to line contact, or a belt system relying only on the pressing force of the pressing belt 34 shown in FIG. Unlike the pressing means 10 of the present invention, the outermost continuous paper 3
The pressing roller 11 or 12 presses the position after the position P1 where a starts to be on the outer peripheral surface of the drag roller 2 and before the position P2 where it starts to separate from the outer peripheral surface. Holding belt 14
Is pressed in a state of surface contact, so that a large pressing force is easily obtained as compared with the conventional method, and a large frictional force is generated on each contact surface. It can be pulled out by force and sent out onto the triangular plate 1.

The continuous paper 3 running around the outer peripheral surface of the drag roller 2 is held by a pair of front and rear pressing rollers 11, 1.
2 and the pressing belt 14 strongly press and pull, so that it is not necessary to provide the paper pressing means 10 at the center position of the paper width as in the related art. Therefore, according to the present invention, even if there are multiple pages and a multi-color printing surface that is a continuous two-page spread using a wide plate on the spread surface, a stain is not generated at the center of the spread surface, and a high-quality multi-page , And the quality of multicolor printing on a two-page spread face can be improved, and the folding accuracy of multipage printing can be stabilized.

Further, a pair of holding rollers 11 and 12 are mounted on individual mounting members 15 and 16, and are disposed at an angle in the circumferential direction of the drag roller 2 with respect to the front and rear and up and down directions. Slots 15a, 16a
The mounting brackets 15 and 16 are fastened to the distal end of the arm 4 with bolts 26 inserted through the mounting holes 15, and the mounting brackets 15 and 16 can be individually adjusted in position along the elongated holes 15a and 16a. Since the distance between the pressing rollers 11 and 12 and the position in the front-back and up-down directions can be adjusted,
There is an advantage that it can easily cope with a change in the number of sheets of continuous paper 3 to be superimposed.

FIG. 5 is a side view showing a paper drawing apparatus according to a second embodiment of the present invention. This paper drawing device includes a first drag roller 2A and a second drag roller 2A which are driven to rotate at a peripheral speed slightly higher than a plate cylinder at an entrance of a folding section of a rotary press.
The first drag roller 2B is disposed in parallel with the drag roller 2B while changing its position up and down and back and forth, and disposed near the printing unit.
A is provided with paper pressing means 10 (10c, 10d) which is attached to and detached from the oblique lower surface of the first drag roller 2A, and the second drag roller 2 disposed on the upper side of the lower triangular plate 1 is provided below.
B, as in the case of the first embodiment, paper holding means 10 attached to and detached from the oblique upper surface of the second drag roller 2B.
(10a, 10b) are provided.

In the paper drawing device according to the second embodiment, the first drag roller 2A is used as two drag rollers.
And the presence of the second drag roller 2B, the presence of the arm 4, the paper pressing means 10, the driving device 6, and the position adjusting means 20 corresponding to each of the drag rollers 2A and 2B,
The paper pressing means 10 (10) for the first drag roller 2A
c, 10d) is the same as that of the first embodiment except that it is arranged to be attached to and detached from the oblique lower surface of the first drag roller 2A. In addition, the description will be omitted for those parts.

In the case of this paper drawing device, the outer peripheral surface on the lower surface side of the first drag roller 2A and the upper surface of the second drag roller 2B are stacked in a state where a plurality of continuous papers 3 printed and sent from a large number of printing units are overlapped. The paper is threaded so as to be wound around the outer peripheral surface, and is sent out to the upper surface of the triangular plate 1.
Then, the plurality of overlapping continuous papers 3 are wound around two drag rollers 2A and 2B to form an S-shape, and
In the drag roller 2A, the continuous paper 3n is pressed by the pressing belt 1 of the paper pressing means 10c, 10d on the first drag roller 2A side.
4, the continuous paper 3a is transferred to the second drag roller 2B by the paper pressing means 10 on the second drag roller 2B side.
The surfaces a and 10b contact the pressing belt 14.

After the paper threading, the first drag roller 2A and the second drag roller 2B are rotated with the respective paper pressing means 10 being put on, and the number of the continuous papers 3 sent out from the printing unit becomes very large. Even in the case of a large number, the peripheral speed difference between the inner and outer paper due to the difference in paper thickness is eliminated, and the inner and outer paper can be pulled out with stable paper tension and sent out onto the triangular plate 1. Therefore, in this embodiment, when the number of continuous papers 3 sent out from the printing unit is particularly large, there is an effect of simplifying the paper passing path. , And can be sent out onto the triangular plate 1, so that there is an advantage that multi-page printing can be easily performed. The operation and effect of the paper holding means 10 are the same as those of the first embodiment.

The present invention is not limited to the above embodiment, and various modifications and changes can be made. For example, as a result of an experiment, it has been confirmed that, depending on printing conditions, the continuous paper 3 can be sent onto the triangular plate 1 by pulling the continuous paper 3 with stable tension even when the forcible driving of the pressing belt 14 is omitted. Therefore, in some cases, it is possible not to forcibly drive the holding belt 14. Further, three or more pressing rollers may be used in place of the pair of pressing rollers 11 and 12 of the paper pressing means 10, and the mounting holes 15a. 16a may be provided continuously along an arc concentric with the drag roller 2.

[0032]

According to the present invention, a paper pressing means is provided at the end of the arm, and the paper pressing means includes an outermost surface of a plurality of continuous paper running around the outer peripheral surface of the drag roller. A plurality of press rollers that roll while pressing in the direction of, and a press belt wound around the plurality of press rollers, the plurality of press rollers are arranged along the circumferential direction of the drag roller, and the press belt is a drag roller. The outermost surfaces of a plurality of continuous paper running around the outer peripheral surface of the paper are pressed against the outer peripheral surface of the drag roller and slid in the traveling direction of the continuous paper, so that the multi-page spread and two continuous pages on the spread surface are formed. In the case where there is color printing, there is an effect that no stain is generated on the facing surface, and moreover, stable and good paper drawing is obtained for both the inside and outside papers. In addition, by providing a driving device that slides the holding belt in the running direction of the continuous paper at substantially the same peripheral speed as the drag roller, the continuous paper can be reliably pulled out while applying an appropriate tension to the continuous paper. By providing position adjustment means for adjusting the mounting position of the plurality of pressing rollers with respect to the leading end in the front-back and up-down directions, the position and range of the continuous paper contacting the drag roller can be changed, such as changing the number of continuous papers to be superimposed. It can be easily handled.

[Brief description of the drawings]

FIG. 1 is a front view showing an arrangement of a paper drawing device according to a first embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view showing a main part of the paper drawing device according to the first embodiment of the present invention.

FIG. 4 is a side view as viewed in the direction of arrow X in FIG. 3;

FIG. 5 is a side view showing an arrangement of a paper drawing device according to a second embodiment of the present invention.

FIG. 6 is a front view showing a typical example of a conventional paper drawing device.

FIG. 7 is a side view of FIG. 6;

8 (A), (B) and (C) are front views for explaining the drawbacks of the conventional paper drawing apparatus.

FIG. 9 is a side view for explaining a defect of the conventional paper drawing device.

FIG. 10 is a side view showing another conventional paper drawing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Triangular plate 2 Drag roller 3 (3a, ..., 3n) Continuous paper 4 (4a, 4b) Arm 5 Air cylinder 6 Drive 7 Drive belt 8a, 8b Pulley 9 Drive shaft 10 (10a, 10b) Paper pressing means 11,12 Pressing roller 13 Drive roller 14 Pressing belt 15, 16 Mounting bracket 15a. 16a Long hole 17 Roller shaft 18 Intermediate shaft 19 Eccentric bush 20 Position adjusting means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takamitsu Doho 5007 Itozakicho, Mihara City, Hiroshima Prefecture Mitsubishi Heavy Industries Mihara Works F-term (reference) 3F108 AA01 AB04 AC04 BA02 BB31 CA04

Claims (3)

[Claims] A drag roller disposed at an entrance of a triangular plate and driven to rotate at a peripheral speed somewhat higher than a plate cylinder, and pressing a plurality of continuous papers printed and superimposed on the outer peripheral surface of the drag roller; In a paper-pulling device for a rotary press, a paper pressing means is provided attached to an end of an arm, and the paper pressing means includes an outermost surface of the plurality of continuous papers which runs around the outer peripheral surface of the drag roller. A plurality of pressing rollers that roll while pressing in the direction of the outer peripheral surface of the drag roller, and a pressing belt wound around the plurality of pressing rollers, and the plurality of pressing rollers are arranged along the circumferential direction of the drag roller. Then, the outermost surfaces of the plurality of continuous papers which run while the pressing belt is wound around the outer peripheral surface of the drag roller are pressed against the outer peripheral surface of the drag roller. Wherein the paper is slid in the running direction of the continuous paper. 2. A paper-pulling device for a rotary press according to claim 1, further comprising a driving device for sliding said pressing belt in the running direction of the continuous paper at substantially the same peripheral speed as said drag roller. 3. The apparatus according to claim 1, further comprising a position adjusting means for adjusting a mounting position of the plurality of pressing rollers with respect to a tip of the arm in a front-rear direction and a vertical direction.
Or the paper drawing device of a rotary press according to claim 2.