JPH0711080Y2 - Folding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a folder attached to a rotary printing press.

<Prior Art> A web-fed rotary printing machine is equipped with a folding machine that cuts a dried and cooled web into predetermined lengths after printing and folds the webs in a width direction or a length direction. . The folding method for this folding machine is a former folding in which the web before cutting is half-folded in the width direction by a former, and a parallel folding in which the signature after cutting is folded in half or four in the length direction with an origami cylinder. There are two-fold folding or parallel folding, and chopper folding in which a folded signature is folded in half in the orthogonal direction with a chopper. These folding methods are selected according to the signature specifications and used independently. , Some of them are combined.

Among the above folding devices, the parallel folding device is parallel 1 and parallel 2
FIG. 2 shows a folding machine capable of selectively performing two types of folding such as folding.

As shown in FIG. 2, the web 11 is cooled and dried after printing.
Is guided to the parallel folding device 12 of the folder. The parallel folding device 12 includes a cutting cylinder 13, a folding cylinder 14, a first gripping cylinder 15, a second gripping cylinder 16, a reduction cylinder 17 that is a receiving cylinder that receives a signature from the first gripping cylinder 15, and upper and lower cylinders. The transfer cylinders 18 and 19 are provided, and these are rotationally driven in synchronization with the direction shown by the arrow in the figure.
Among these, the cutting cylinder 13 and the folding cylinder 14 have a plurality of needles arranged in parallel with a cutting blade 20 that cuts the web 11 in predetermined dimensions and abuts it on the lower half circumferential surface of the folding cylinder 14. 21 and both body 13,1
They are arranged so as to face each other at a position that divides the peripheral surface of 4 into two in the circumferential direction. Further, on the outer peripheral portion of the folding cylinder 14, two rows of insertion knives 22 are provided which are arranged in parallel in the axial direction and are set at a substantially middle position between both needles 21 in the circumferential direction. On the other hand, at the position where the circumferential surface of the first gripper cylinder 15 is divided into two equal parts in the circumferential direction, a gripping plate 23 having a plurality of sets arranged in parallel in the axial direction faces each of the insertion knives 22. Are arranged.
Further, at the position where the circumferential surface of the first gripper cylinder 15 is equally divided into two in the circumferential direction, two rows of inserting knives 24, which are a set of a plurality arranged in parallel in the axial direction, are provided from the gripping plate 23. Also about 45 to the body rotation direction
At a position that is delayed, and at a position where the circumferential surface of the second gripper cylinder 16 for parallel double bending is divided into two equal parts in the circumferential direction, a plurality of sets arranged in parallel in the axial direction are provided. 2 rows of holding plates
25 are arranged facing each insertion knife 24. The cylinders 13, 14, 15 and 16 described above have the same diameter and rotate at the same peripheral speed.

The reduction cylinder 17 is provided on the front side of the second holding cylinder 16 in the transport path of the signature and has a diameter approximately 1.5 times as large as that of the first holding cylinder 15, and its peripheral surface is in the circumferential direction. A gripping claw 26 composed of four rows of claws and a claw base, which are parallel to each other in the axial direction, is disposed at a position substantially equally divided into four. Is set to be lower than the peripheral speed of the first support cylinder 15, even if there is a difference between the number ratio of the support plates 23 and the support jaws 26 and the diameter ratio of the two transfer cylinders 15 and 17, the support plate 23 and the jaw 26 are configured to face each other. Also, the upper and lower transfer cylinders 18,19
Is rotating at the same rotation ratio as the reduction cylinder 17 with a different diameter, and at a position where each circumferential surface is equally divided into two in the circumferential direction, two sets of claws arranged in parallel in the axial direction form one set. And claws 27 and 2
8 is provided at a position opposed to the jaw 26 by rotation. Further, a chopper device is arranged on the downstream side of each of the transfer cylinders 18 and 19 via a conveyor belt (not shown).

In the figure, 31 is an upper paper retainer and 32 is a lower paper retainer.

In such a cylinder arrangement, when each cylinder rotates and the web 11 is fed between the cutting cylinder 13 and the folding cylinder 14, the web is
11 is cut by a cutting blade 20 to a predetermined size, and the web 11 following the cutting line is held by a needle 21 and wound around the lower semicircular surface of the folding cylinder 14, and its paper tail end is It is cut by the cutting blade 20 in the same manner as above. Then, the cutting web held by the needle 21 is wound around the folding cylinder 14 until the central portion in the lengthwise direction reaches the opposite contact points of the two cylinders 14, 15, and the inserting knife 22 and the gripping plate 23 face each other. Therefore, the center of the cutting web is clamped by the gripping plate 23 by the cooperation of the inserting knife 22 and is folded in half to form a signature and is attached to the upper peripheral surface of the first gripping cylinder 15.

Here, when the specification of the signature is one-fold parallel, the above-mentioned half-fold signature has the holding plate 23 of the first holding cylinder 15 to the holding jaw of the reduction cylinder 17.
Replaced by 26. That is, when the gripping plate 23 and the gripping claw 26 come close to the contact position, the gripping plate 23 holds the signatures held until then.
29, and then the jaw 26 of the speed reducer 17 closes and the signature 29
By holding the tip of the
Delivery to 17 is done. After that, the signature held by the jaw 26 is first transferred to the jaw 28 of the lower transfer cylinder 19 and conveyed, and the next signature following is the jaw of the upper transfer cylinder 18. It is carried by 27. The signatures alternately conveyed by the upper and lower transfer cylinders 18, 19 in this manner are discharged onto a conveyor belt (not shown).

On the other hand, if the signature of the signature is double-fold, the first gripper
The signature held by the gripping plate 23 of 15 passes through the position of contact with the reduction cylinder 17 and reaches the position of the second gripping cylinder 16, where the insertion knife 24 of the first gripping cylinder 15 By the cooperation, it is held by the holding plate 25 of the second holding cylinder 16 and half-folded for the second time, and is attached to the upper peripheral surface of the second holding cylinder 16. The signature folded in parallel twice is then carried out onto an impeller (not shown). In the case of this two-fold parallel bending, the holding plate 23 of the first support cylinder 15 is not opened at the position facing the reduction cylinder 17 and is closed until the above-mentioned second support cylinder 16 is delivered. As described above, by exchanging the opening / closing drive cam and shifting the rotational phase of the reduction cylinder 17 with respect to the first jaw cylinder 15, the jaw 26 of the reduction cylinder 17 comes into contact with the signature when passing the signature. Try not to.

Therefore, the folding machine 12 described above can selectively perform parallel 1-fold and parallel 2-fold.

<Problems to be Solved by the Invention> In the above-described double folding of the folding machine 12, when the signature 34 is conveyed by the first gripper cylinder 15, the second gripper cylinder 16 causes the first gripper cylinder 15 to move. Since the paper tail side 34a of the signature 34 is vertical and free when the signature 34 passes through the reduction cylinder 17, the moving speed of the paper tail side 34a is higher than the conveyance speed of the signature 34. It gets faster. As a result, as shown in FIG. 2, the paper tail side 34a of the signature 34 runs ahead, and the paper tail side 34a becomes too wavy in front of the lower paper retainer 32, causing a paper flutter and causing the paper tail side. 34a was broken, cut, and wrinkled. This phenomenon is particularly likely to occur during high-speed operation, and if a fold or the like occurs on the paper tail side 34a, as shown in FIG. It was

The present invention has been made in view of the above circumstances, and provides a folder in which the trailing edge of a sheet held by the first gripper cylinder with two parallel bends does not lead to the trailing edge of the paper, The purpose of this is to improve the quality of the product by preventing the occurrence of folds, cuts and wrinkles on the side of the paper.

<Means for Solving the Problems> The structure of the present invention for activating the above-mentioned object is provided with an insertion knife for performing the first parallel folding of the signature and the second parallel folding. A first gripper cylinder, a second gripper cylinder that is provided with a gripper plate that cooperates with the insertion knife of the first gripper cylinder, and performs a second parallel folding of the signature, and on the conveyance path of the signature. A signature cylinder that is provided on the front side of the second gripper cylinder by rolling contact with the first gripper cylinder, and that receives a signature folded by the first gripper cylinder with a clamp jaw; Parallel 1 bend passed from the first gripping cylinder to the receiving cylinder without passing through the second gripping cylinder, and parallel 2 when the signature passes through the first gripping cylinder and the second gripping cylinder. In a folding machine capable of selectively performing folding and folding, a bullet is attached to the receiving cylinder at a portion corresponding to a paper tail side of a signature conveyed by the first gripping cylinder. It is characterized in that a paper retainer made of a force member is provided.

<Operation> In the case of parallel double bending, the signature held by the first gripper cylinder passes through the receiving cylinder which is in contact with the first gripper cylinder and is replaced by the second gripper cylinder. The paper tail side of the signature that passes through the receiving cylinder before being changed to the second gripping cylinder is closely attached to the first gripping cylinder by the paper retainer provided on the receiving cylinder to prevent the leading edge.

<Embodiment> FIG. 1 shows a cylinder arrangement of a folding machine according to an embodiment of the present invention. The same members as those shown in FIG. 2 are designated by the same reference numerals, and duplicate description will be omitted.

A rotational phase portion corresponding to the paper tail side 34a of the signature 34 conveyed by the first gripper cylinder 15, that is, the reduction cylinder 17 on the rear side in the rotation direction of the gripper 26 is made of an elastic member (rubber or the like). Paper foot
41 is attached, and the thickness of the paper presser 41 is substantially equal to the gap between the first holding cylinder 15 and the reduction cylinder 17.

When performing the parallel two-fold bending, the signature 34 held by the holding plate 23 of the first holding cylinder 15 passes through the position where it is in contact with the reduction cylinder 17 and reaches the second holding cylinder 16. The knife 24 of the first gripper 15
Is supported by the support plate 25 of the second support cylinder 16 and half-folded for the second time, and is attached to the upper peripheral surface of the second support cylinder 16.

The paper tail side 34a of the signature 34 is located at a position where it faces the reduction cylinder 17
The sheet is pushed to the first gripping cylinder 15 by 1 and conveyed, and the paper tail side 34a is continuously pushed until it passes the contact center position. The paper tail side 34a of the signature 34 is pressed by the paper clamp 41 of the deceleration cylinder 17 to the first gripper cylinder 15 after passing through the upper paper presser 31, and the rear paper tail side 34a passing through the contact center position is It is pressed against the lower paper presser 32 in close contact with the first holding cylinder 15.

Therefore, the paper tail side 34a of the signature 34 does not run ahead at the position where it is connected to the speed reduction cylinder 17, and no paper flapping occurs on the paper tail side 34a even during high-speed operation. Does not break.

Although the receiving cylinder is the reduction cylinder 17 in the above-mentioned embodiment, the present invention is not limited to this, and the receiving cylinder is arranged on the front side of the second gripping cylinder 16 and makes one parallel bend. First
Of course, it can be applied to other cylinders that receive signatures from the gripper cylinder 15.

<Effect of the Invention> Since the folding machine of the present invention is provided with the paper presser on the receiving cylinder in the portion corresponding to the paper tail side of the signature conveyed by the first gripper cylinder,
Before the paper is transferred to the second gripper, the paper tail side of the signature conveyed by the first gripper is pressed against the first gripper at the position where it is in contact with the receiving cylinder. The first run is prevented. As a result,
Paper bleeding does not occur on the paper edge side, and it is possible to prevent cuts, wrinkles, and folds on the paper edge side, and improve product quality.

[Brief description of drawings]

FIG. 1 is a cylinder array diagram of a folding machine according to an embodiment of the present invention, and FIG.
FIG. 3 is a cylinder array diagram of a conventional folding machine, and FIG. 3 is a perspective view of a product in which a paper fringing occurs on the paper tail side. In the drawing, 14 is a folding cylinder, 15 is a first gripping cylinder, 16 is a second gripping cylinder, 17 is a reduction cylinder, 26 is a gripping jaw, 34 is a signature, 34a is a paper edge side, 41 is a paper holder. Is.

Claims (1)

[Scope of utility model registration request] 1. A first knife provided with an insertion knife for performing a first parallel folding of a signature and a second parallel folding.
A second gripper cylinder that is provided with a gripper cylinder and a gripper plate that cooperates with the insertion knife of the first gripper cylinder to perform the second parallel folding of the signature, and on the transport path of the signature. The second gripper cylinder is provided on the front side of the first gripper cylinder so as to be in contact with the first gripper cylinder, and has a receiving cylinder for receiving the signature folded by the first gripper cylinder with the clamp jaws. A single parallel bend that is passed from the first gripping cylinder to the receiving cylinder without passing through the second gripping cylinder, and a signature is folded twice through the first gripping cylinder and the second gripping cylinder. In a folding machine capable of selectively folding and folding, a paper presser made of an elastic member is provided on the receiving cylinder at a portion corresponding to the paper tail side of the signature conveyed by the first gripping cylinder. Folding machine characterized by that.