JPS63282053A - Folding machine - Google Patents

Abstract

PURPOSE:To easily prevent the hooking of folded sheet by the catching claw of a receiving drum at the time of parallel double folding by providing a phase adjusting means for changing the relative revolution phase to both drums, in the row of driving gears which rotate the first catching drum and the receiving drum synchronously with each other. CONSTITUTION:When changing parallel single folding to parallel double folding, an operation dial 49 is operated so as to rotate an operation axis 46 to shift an adjusting axis 39 in the axis line direction through spur gears 47, 48. By this shifting, an intermediate gear 35 and an accelerating gear 36 are shifted in the axis line direction and the engaging positions, in the axis direction, between the decelerating gear 33 and the intermediate gear 35, and the accelerating gear 36 and the transmitting gear 37 are changed and the phase of the decelerating gear is changed against the first catching drum and the catching claw of this decelerating drum is shifted and adjusted to such a position that it doesn't contact with the folded sheet caught by the first catching drum in double folding.

Description

[Detailed description of the invention] <Industrial usage total> The present invention relates to a folding machine attached to a rotary printing press.

<Prior Art> A paper web rotary printing press is equipped with a folding machine that cuts the dried and cooled web into predetermined lengths after printing, and folds the web in the radius direction or length direction. . This method of folding due to breakage includes former folding, in which the uncut nib is folded in half in the width direction using a former, and folding in half or quarters in the lengthwise direction after cutting, using an origami cylinder. There are two parallel folds, one parallel fold, two parallel folds, and a chitsuba fold, in which a parallel folded signature is folded in half in the orthogonal direction with a chinkatsuba, and these folding methods are selected according to the specifications of the signature. They can be used alone or in combination.

Among the above-mentioned folding devices, the parallel folding device is used for parallel 1st folding and parallel 2nd folding.
For devices that can selectively perform two types of folding 9, there is usually a first parallel fold 9 that performs the first parallel fold 9 of the signature.
a second gripping cylinder that cooperates with the first gripping cylinder to perform a second parallel fold of the signature; and a first gripping cylinder that folds the signature before reaching the second gripping cylinder. It has a receiving trunk for receiving from. Therefore, when parallel 1 @ folding is performed, the signature is transferred to the receiving cylinder from the first gripper cylinder before reaching the second gripper cylinder, while the parallel 2
In the case of diffraction 9, it passes through the receiving cylinder and from the first mouth cylinder v,
The signature is sent to the second mouth cylinder and the second parallel fold 9 is performed.

<Problems to be Solved by the Invention> In the parallel folding device of the folding machine as described above, when performing two parallel folds, it is necessary for the signature to pass through a transfer position between the first gripping cylinder and the receiving cylinder. However, there is a problem in that there is a risk that the signatures may be caught and damaged by the claws of the receiving cylinder as they pass through.

In order to prevent the above-mentioned disadvantages, when performing two parallel folds, it is possible to stop the operation of the holding claws on the receiving cylinder so that the holding melons remain protruding from the peripheral surface of the receiving cylinder. In order to do this, troublesome work such as replacing the cam that drives the gripping claws to open and close is required.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and an object of the present invention is to provide a folding machine that can prevent signatures from being caught by the gripping claws of the receiving cylinder during two parallel folds with a simple operation. It is said that

<Means for solving the 1!1m point> The present invention that solves the above-mentioned problems ζζSuch a folding machine has a first jaw cylinder that performs the first parallel fold of the signatures, and a second parallel fold of the signatures. a second gripping cylinder that performs parallel folding, and a receiving cylinder that is provided on the front side of the second gripping cylinder on the signature conveying path and receives the signature folded by the first gripping cylinder with a gripping claw. a single parallel fold in which the signature is transferred from the first jaw cylinder to the receiving cylinder without passing through the second jaw cylinder; and In a folding machine capable of selectively performing two parallel folds via a jaw cylinder, the first jaw cylinder is disposed in a driving gear train that rotates the first jaw cylinder and the receiving cylinder in synchronization with each other. The present invention is characterized in that a phase adjustment means is provided for changing the relative rotational phase between the receiving cylinder and the receiving cylinder.

The phase adjustment means adjusts the relative rotational phase between the first gripping cylinder and the receiving cylinder so that the gripping claws of the receiving cylinder can cooperate with the first gripping cylinder in the case of parallel one-diffraction seconds. On the other hand, in the case of parallel double folding, the relative rotational phase between the first gripping cylinder and the receiving cylinder is adjusted until the gripping claw of the receiving cylinder does not come into contact with the signature held in the first gripping cylinder. is changed.

Embodiment Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a cross-sectional view of essential parts of a folding machine according to an embodiment of the present invention;
FIG. 2 is a side view showing the gear train, FIG. 3 is a diagram showing the arrangement of the cylinder, and FIG. 4 is an enlarged view of the arrangement of the cylinder.

As shown in FIG. 3, the web 1 is cooled and dried after printing.
1 is guided to a parallel folding device 12 of a folding machine according to the present invention.

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 deceleration cylinder 17 which is a receiving cylinder that receives signatures from the first gripping cylinder 15, and an upper and lower Transfer trunk 18.
19, which are rotatably driven in synchronization in the directions indicated by arrows in the figure. Of these, the cutting cylinder 13 and the folding cylinder 14 have a cutting blade 2 that cuts the web 11 into predetermined dimensions and attaches it to the lower half circumferential surface of the folding cylinder 14.
0 and a plurality of needles 21 arranged in parallel in the axial direction, the image tone 13,
They are disposed facing each other at positions that equally divide the circumferential surface of No. 14 into two in the circumferential direction. Further, on the outer circumferential portion of the folding drum 14, two rows of insertion knives 22 each having a plurality of knives arranged in parallel in the axial direction constitute one set.
are provided at approximately the center in the circumferential direction of both needles 21, and on the other hand, needles are arranged in parallel in the axial direction at positions that bisect the curved surface of the first jaw cylinder 15 into two in the circumferential direction. A plurality of gripping plates 23 are arranged to face each insertion knife 22. Furthermore, at the position where the surface of the first mouth cylinder 15 is divided into two in the circumferential direction, a plurality of
The two rows of insertion knives 24 that form the set are arranged at positions approximately 45° behind the mouth plate 23 in the direction of rotation of the body.
Furthermore, two rows of gripping plates 25 each having a plurality of gripping plates arranged in parallel in the axial direction are arranged at positions that bisect the circumferential surface of the second gripping cylinder 160 for parallel two-fold folding into two equal parts in the circumferential direction. , are arranged opposite to each insertion knife 24. The above can bodies 13, 14, 15,
16 has the same diameter and rotates at the same circumferential speed.

The deceleration unit 17 is configured to reduce the speed of the second gripping cylinder 16 in the conveyance path of the signatures.
It is provided on the front side of the
．． It has a diameter five times that of the paper, and at positions that divide the surface into four equal parts in the circumferential direction, there are four rows of claws and a claw stand, each consisting of a plurality of claws arranged in parallel in the axial direction. A gripping claw 26 is provided, and the peripheral speed of this deceleration 17 is set to be slower than the peripheral speed of the first gripping cylinder 15 (by setting the number ratio of the gripping plate 23 to the gripping claw 26, Even if there is a difference in the diameter ratio of the image scales 15 and 17, the grip plate 23 and the grip claw 26 are configured to face each other. It has a different diameter and rotates at the same rotation ratio, and at the position dividing each surface into two in the circumferential direction, it consists of two sets of claws and a claw base, each set consisting of a plurality of claws arranged in parallel in the axial direction. Grip claws 27, 28 are provided at positions that rotate to face the grip claws 26.Furthermore, on the downstream side of each transfer drum 18, 19, a chopper device is arranged via a conveyor belt (not shown). It is set up.

In such a barrel arrangement, the can barrel rotates and the web 11
When the nib 11 is fed between the cutting tool 13 and the folding cylinder 14, the nib 11 is cut into predetermined dimensions by the cutting blade 20, and the web 11 following the cutting line is held by the needle 21. The paper is wrapped around the lower half circumference of the folding cylinder 14, and the tail end of the paper is cut by the cutting blade 20 in the same manner as described above. and needle 2
When the cutting nib held at 1 is wrapped around the folds 19 and 14 until its longitudinal center reaches the point of contact at an angle of 14°15, the insertion knife 22 and the gripping plate 23 face each other. Therefore, the center of the nib to be cut is held in the gripping plate 23 by the cooperation of the insertion knife 22 and folded in half to form a signature and attached to the upper curve of the first gripping cylinder 15.

Here, if the specification of the signature is one parallel fold, the above-mentioned half-fold signature is
It can be held in the holding claw 26 of . That is, as shown in FIG. 4, when the gripping plate 23 and the gripping claw 26 approach the opposing position, the gripping plate 23 releases the signature 29 that it had been gripping, and
After that, the gripping claw 26 on the deceleration side 17 closes and grips the leading end of the signature 29, so that the deceleration side 1
7 is transferred. Thereafter, the signature held in the gripping claw 26 is first transferred to the gripping claw 28 of the lower transfer drum 19 and conveyed, and the next subsequent signature is transferred to the gripping claw 28 of the upper transfer drum 18. 27 and transported. The signatures thus alternately conveyed by the upper and lower transfer cylinders 18, 19 are discharged onto a conveyor belt (not shown).

On the other hand, when the specification of the signature is parallel 2 diffraction 9, the signature held in the gripping plate 13 of the first gripping cylinder 15 passes through the position facing the deceleration 17 and is placed in the second gripping cylinder 15. It reaches the barrel 16, and with the cooperation of the insertion knife 24 of the first jaw barrel 15, the second jaw barrel 16 is removed.
While being held in the holding plate 25 of the second holding plate 25 and folded in half for the second time, it is attached to the upper curve of the second holding cylinder 16. The folded signature twice in parallel is then discharged onto an impeller (not shown). In the case of this parallel folding twice, the gripping plate 23 of the first gripping cylinder 15 is not opened at a position facing the deceleration 17 but is closed until the transfer to the second gripping cylinder 16 described above is performed. By replacing the opening/closing driving cam and shifting the rotational phase of the deceleration 17 with respect to the first gripping cylinder 15 as described later, the gripping pawl 26 of the deceleration W417 folds when the signature passes. Avoid contact with the knife.

Hereinafter, a mechanism for shifting the rotational phase of this deceleration 17 with respect to the first jaw cylinder 15 will be explained.

As shown in FIG. 1, the winter gears 13 to 19 (not shown in FIG. 1) are spanned and pivoted between opposing frames 30 and 31, and are mounted on the outside of one of the frames 31. Those winter drive gear trains 13 to 19 are installed. In FIG. 2, 32 is a first mouth barrel gear fixed to the rotating shaft of the first mouth barrel 15, 33 is a reduction gear fixed to the rotating shaft of the reduction gear 17, 34 is a drive gear, and 35 is a An intermediate gear that meshes with the drive gear 34 and the reduction gear 33; 36 is a speed-up gear that rotates together with the intermediate gear 35; and 37 is a transmission gear that meshes with the reduction gear 36 and the first jaw barrel gear 32. Both are helical gears. Drive gear 34
The rotation of A drive gear train 38 is configured to rotate the drum 15 and the speed reducer 17 in synchronization with each other. Although not shown, drive gear trains are similarly provided for the other cylinders 13, 14, 16, and 18° 19 to rotate in conjunction with each other.

As shown in FIG. 1, the intermediate gear 35 has a cylindrical shape, and a speed increasing gear 36 is fixed to the end of the intermediate gear 35, which is rotatably supported by an adjustment shaft 39 via a bearing 40. There is.

The adjustment shaft 39 is supported by the frame 31 so as to be freely slidable in the axial direction, and a threaded portion 41 is formed at one end of the adjustment shaft 39.
It is screwed into the screw hole provided in 2. Further, the transmission gear 37 similarly has a cylindrical shape, and is rotatably supported by a support shaft 43 fixed to the frame 31 via a bearing 44.

Further, a spur gear 45 is fixed to the other end of the adjustment shaft 39. On the other hand, an operating shaft 46 is pivotally supported across both frames 30 and 31, and a spur gear 47 fixed to the operating shaft 46 meshes with a spur gear 45 of the adjusting shaft 39. One end of the operating shaft 46 extends to the outside of the frame 30, and an operating dial 48 is fixed to the tip, and a clamp 49 that can fix the operating shaft 46 at a desired rotation angle position is attached.

In such a configuration, when the operation dial 48 is operated to rotate the operation shaft 46 with the clamp 49 loosened, the rotation is transmitted to the adjustment shaft 39 via the spur gear 47.45. When the adjusting shaft 39 rotates, the threaded portion 4
1 is screwed with the bracket 42, the adjustment shaft 39
itself moves in its axial direction, and the intermediate gear 35
The speed increasing gear 36 also moves in the axial direction. As a result, the reduction gear 33, the intermediate gear 35, and the speed increasing gear 3
6 and the transmission gear 37 change in the axial direction, and since they are helical gears, their relative rotational phase changes. That is, by rotating the operation dial 48, the relative rotational phase between the first jaw cylinder 15 and the deceleration 17 can be adjusted.

Therefore, when performing one parallel fold, as shown in FIG. Ember 15 and deceleration 17
While adjusting the rotational phase of the first jaw cylinder 15, when performing parallel two-fold bending, the phase of the deceleration 17 is changed with respect to the first jaw cylinder 15, and it is placed in front of the position A shown by the imaginary line in Fig. 4. , position B
Try to delay it until later. In this way, the gripping claws 26 do not come into contact with the signature passing between the first gripping cylinder 15 and the deceleration member 170 during two parallel folds, and the gripping claws 26
can be prevented from getting caught on signatures and damaging them. Here, even in this parallel folding twice, the deceleration 1
Since there is no problem even if the gripping claw 26 of No. 7 is opened and closed at a predetermined timing, there is no need to replace the opening/closing drive cam, etc.

In addition, although the above-mentioned embodiment described an example in which the receiving device is the reduction cylinder 17, the present invention is not limited to this.
It is placed on the front side of the second gripping cylinder and the first
Of course, the present invention can also be applied to other cylinders that receive signatures from the mouth cylinder.

<Effects of the Invention> As described above in detail with reference to one embodiment, according to the present invention, the receiving cylinder and the first jaw are used for one parallel folding and are unnecessary for two parallel folds. Since the relative rotational phase with the cylinder can be changed, it is possible to easily prevent signatures from being caught by the gripping claws of the receiving cylinder during two parallel folds, resulting in high efficiency (adaptable to changes in signature specifications). becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts of a folding machine according to an embodiment of the present invention;
Figure 2 is a side view showing the gear train, Figure 3 is the same (the cylinder arrangement diagram, and Figure 4 is an enlarged layout diagram of the main parts. In the drawing, 13 is for cutting, 14 is the folding cylinder, 15 is a first mouth cylinder, 16 is a second mouth cylinder, 17 is a reduction cylinder, 18.19 is a transfer cylinder, 26 is a grip claw, 32 is a first mouth cylinder gear, 33 is a reduction cylinder gear, 35 is an intermediate gear, 36 is a speed increasing gear, 37 is a transmission gear, 39 is an adjustment shaft, 41 is a screw portion, 42 is a bracket, 45.47 is a spur gear, 46 is an operating shaft, and 48 is an operating dial.Second Figure 3

Claims (1)

[Claims] A first gripping cylinder that performs the first parallel fold of the signature, and a second gripper for the signature.
A second gripping cylinder that performs the second parallel fold, and a gripping claw provided on the front side of the second gripping cylinder on the signature conveying path, and receiving the signature folded by the first gripping cylinder with a gripping claw. a receiving cylinder, a single parallel fold in which the signature is transferred from the first gripping cylinder to the receiving cylinder without passing through the second gripping cylinder; In a folding machine that can selectively perform two parallel folds via a second jaw cylinder, the first jaw cylinder and the receiving cylinder are arranged in a driving gear train that rotates the first jaw cylinder and the receiving cylinder in synchronization with each other. A folding machine characterized in that a folding machine is provided with a phase adjustment means for changing the relative rotational phase between the first gripping cylinder and the receiving cylinder.