JPH0825680B2 - Folding machine for rotary printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention divides the outer periphery of a plate cylinder of a rotary printing machine into two equal parts,
The present invention relates to a folding machine of a rotary printing press that separates A and B pages when the A and B pages are used.

[Conventional Technology] A conventional technology will be described with reference to FIG. A paper strip printed by a rotary printing machine (not shown) is vertically folded at the center by a triangular plate former 1 to form a paper strip 20 and cut horizontally by a cutting cylinder 2 to form a signature. When the outer circumference of the cylinder is divided into two equal parts, A and B, each page is cut, so the cutting cylinder 2 cuts the paper strip 20 twice for each rotation of the plate cylinder and folds each page. I'll use it. The signature 23 cut by the cutting cylinder 2 is sandwiched between the guide belt devices 5 and 6, pulled by the timing roll 3 and transferred to the nail cylinder 21, and the gripping jaw device 22 grips the leading edge 23a of the signature 23. The transfer device is moved to the separation claw bodies 27, 28 adjacent to the claw body 21 and again held by the gripping device 2 of the separation claw bodies 27, 28.
It is held by 9,30, sandwiched between guide belt devices 7,8 and 9,10 and transferred to respective impellers 16,17, and aligned on each discharge table 18,19 for each A page and B page. Are discharged.

[Problems to be Solved by the Invention] In such a conventional technique, as the means for separating the A page and the B page, the holding edge device 22 of the nail cylinder 21 which is troublesome to maintain is used by the leading edge 23a of the signature 23. Hold the claw and separate it 2
The gripping device is replaced with 7,28 gripping device 29,30, and not only the gripping body of the gripping nail becomes very expensive, but also the scars of the gripping nail can be inevitably made into signatures. It was necessary to lengthen the signature extra, and the paper strip was wasted. Further, there is a drawback that the increase in printing speed is limited to the limit speed of the jaw, and improvement thereof has been demanded.

The present invention eliminates these drawbacks, and has a simple structure, low cost, and easy maintenance,
Moreover, it is an object of the present invention to provide a folding machine of a rotary printing press that can realize high speed.

[Means and Actions for Solving Problems] According to the present invention, the trailing edge of the signature on the previous page and the trailing edge of the signature on the previous page are provided by the timing roll driven at an outer peripheral speed slightly higher than the speed of the paper strip transferred by the rotary printing press. There was a space between the leading edge of the page signature and a pair of separator plates on the left and right sides of the separator were alternately inserted in this space, and the signatures were distributed to the left and right for each A page and B page. The signature is configured to be conveyed between the pair of left and right guide belt devices and a belt of a small-diameter guide roller device, and to be conveyed downward to the left and right impellers, respectively, to be ejected to the ejection table.

[Examples] Examples of a folding machine of a rotary printing machine according to the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram.

A paper band printed by a rotary printing machine (not shown) is vertically folded at the center of the paper band width by a triangular plate former 1 to form a paper band 20 and cut by a horizontal cutting cylinder 2 page by page to form a signature. Become. This signature is inserted into the entrance-side nip formed by the pair of narrow guide belts 31 and 32. Since the guide belt 31 is driven in the clockwise direction and the guide belt 32 is driven in the counterclockwise direction, the signature is conveyed while being sandwiched between the belts 31 and 32 below. Then, since the signature is sandwiched by the pair of timing rolls 33 that are driven at a peripheral speed slightly higher than the moving speed of the paper strip 20, the trailing edge of the signature on the previous page and the leading edge of the signature on the next page are sent. There will be a gap between and. The guide belts 31 and 32 are arranged by arranging a plurality of narrow belts in parallel, and the exit side of the guide belts 31 and 32 is ball bearings on plate-like brackets 36 and 37 as shown in FIG. A pair of disc-shaped guide rollers 34 and 35 rotatably supported via a small diameter guide roller device 50 described later.
The left and right small-diameter guide rollers 52, 53 form a nip on the downstream side. The separator 40
Is arranged.

The separator 40 is mainly composed of separation plates 41 and 42. The left side separation plate 41 is a disc-shaped outer periphery of approximately 1/8 of the separation claws 41a, 4a.
A member formed in an S shape having 1b and having a separation plate 42 on the right side.
Is also an inverted S-shaped member having approximately 1/8 of the disk-shaped outer periphery of the separation claws 42a, 42b, which are fitted to the respective drive shafts 43, 44, and are separated claws 41a, 41b and 42a, 42b are arranged so as to intersect with each other at the center of the nip, and the separating claws 41 and 42 are attached so that their phases differ by 90 degrees. And each separation plate 41
As shown in detail in FIG. 4, the boss portion is attached by setting the axial position of the drive shaft 43 with a set screw 47 and aligning the phase with a key 45.

Further, a small-diameter guide roller device 50 for guiding the signatures distributed by the separation claws 41a, 41b, 42a, 42b of the separation plates 41, 42 is arranged at the center of the nip on the outlet side. In this small-diameter guide roller device 50, as shown in FIGS. 2 and 3, the left and right small-diameter belt wheels 52, 53 are respectively provided with bearings 54, 53 at the tips of elongated pentagonal brackets 51, 51.
Both ends via 54 are rotatably supported by shafts 55 supported by the plate brackets 51, 51, narrow guide belts 61, 62 are respectively stretched, and the left belt 61 is counterclockwise, The belt 62 on the right side is driven clockwise. Therefore, the guide belt 31 moves to the lower left in combination with the belt 61 of the small diameter belt wheel 52 after forming the nip by the guide roller 34, and the guide belt 32 moves to the lower right in combination with the belt 62 of the small diameter belt wheel 53. It is configured to transfer the sorted signatures.

Next, the operation of the folding machine of the rotary printing press thus configured will be described. The paper band 20 folded vertically by the former 1 is cut into pages by the horizontal cutting cylinder 2 into a signature, and is paired by a pair of timing rolls 33 driven at a peripheral speed slightly higher than the transfer speed of the paper band 20. Since it is sent between the guide belts 31 and 32 by sandwiching it, the trailing edge of the signature 65 on the previous page and the signature 64 on the next page
There is a gap between the leading edge of the. The separation plate 41 of the separator 40 or the separation claws 41a and 41 of the separation plate 41 of the 42 are arranged at this interval.
The signature 64 is sorted to the left side and the signature to be transferred next is sorted to the right side by rotating b or 42a, 42b by rotating it to the right or the counterclockwise, respectively. A differential gear mechanism 70 is provided so that the timings of the separating plates 41 and 42 are taken from the drive system of the cutting cylinder 2 and aligned. The pair of separation plates 41, 42 are driven by gears (not shown) so that the peripheral speeds of the separation claws 41a, 41b, 42a, 42b on the outer circumferences thereof are the same as those of the belts 31, 32 of the guide belt device.

The state shown in FIG. 2 is the trailing edge 65a on page A.
To the leading edge 64a of page B and the separating plate 4
This is the moment when the second separating claw 42a is about to interrupt. As the separating plate 42 rotates counterclockwise, the signature is separated by the separating claw 42a of the separating plate 42.
And guide roller 52, guide roller 34 and guide belt 31
Is guided to the left side, then is sandwiched between the guide belt 31 and the guide belt 61 hung on the small-diameter guide roller 52, and is conveyed downward as indicated by an arrow B, and the distribution on the left side of page B is completed. Next, while the separating plate 42 rotates 1/4 turn, the separating plate 41 on the left side rotates to the right and becomes close to the leading edge of the signature of the A page next to the B page, like the separating plate 42. The same page is sorted to the right by 1/4 rotation, sandwiched between the guide belt 32 and the belt 62, and conveyed as indicated by arrow A.

Here, the separation claws 41a, 41b and 42 of the left and right separation plates 41, 42
The diameter of a, 42b is slightly more than twice the diameter of the plate cylinder of the rotary printing press, and the peripheral speed of the separating claws 41a, 41b, 42a, 42b is the same as the transfer speed of the signature. The signatures are surely distributed to the left and right every 1/4 rotation of 41, 42. The sorted signatures are discharged to the left and right impellers 16 and 17 by the belts 31, 61 and 32 and 62 of the belt device, and are further sequentially arranged and stacked on the discharge tables 18 and 19 made of the belts. .

[Effects of the Invention] As described above, the folding machine of the rotary printing press of the present invention has a simpler structure than the conventional folding cylinder type.
It can be manufactured at an extremely low cost. Further, the signature is not scratched or scratched by the jaw mechanism such as the jaw cylinder, and it is not necessary to provide an extra margin for the signature. further,
The printing speed was held at the limit speed of the jaw,
Since the jaws are not used, the speed can be easily increased and maintenance is very easy.

[Brief description of drawings]

FIG. 1 is a side view of the entire structure of a folding machine of a rotary printing press showing an embodiment of the present invention, FIG. 2 is a side view showing an enlarged view of the separator portion of FIG. 1, and FIG. FIG. 4 is a front view showing a separation plate partially broken, FIG. 4 is a front view showing a small-diameter guide roller device taken along the line III-III in FIG. 2, and FIG. 5 is a conventional rotary printing press. It is a whole block diagram of the folding machine. 2 …… Cutter cylinder 31,32 …… Guide belt (device) 33 …… Timing roll 35,36 …… Guide roller 40 …… Separator 41,42 …… Separator 50 …… Small diameter guide roller device 51,52 …… Small diameter guide roller

Claims (1)

[Claims] 1. A timing roller (33) which is driven at a peripheral speed slightly higher than the peripheral speed of the cutting cylinder to separate the signatures cut by the cutting cylinder, and is provided immediately before the signatures are distributed to the left and right. The pair of guide rollers (34, 35), the pair of small diameter belt wheels (52, 53) provided below the guide rollers, and the peripheral speed are the same as the moving speed of the signature, and the rotation timing is different. Formed in an S-shape with approximately 1/8 of the disc-shaped outer peripheral separation claws (41a, 41b, 42a, 42b) configured to be taken from the drive system of the cutting cylinder via phase matching means such as a dynamic gear mechanism. Rotate the separation plates (41, 42) between the rotation axes of the separation plates so that the phases of the separation plates are shifted by 90 degrees and the gap between the signatures is interrupted so that the direction of travel of the signatures is divided into left and right. The outer circumference is made smaller than the outer diameter so that the outer circumferences of rotation of the separating plates intersect with each other, and the starting point of the intersection is the pair of guide rollers (34, The guide plate (31, 32) and the second guide belt (61, 32) wound around the first guide belt (31, 32) and the small-diameter belt wheel (52, 53) are provided so as to be close to each other. It consists of a pair of separators (40) installed near the confluence point of 62), and sorts the A and B pages of the signature cut from the paper band and conveys them to the respective impeller devices and discharges them. Folding machine for rotary printing press, which discharges to the table.