JPH09208101A - Pull-out binding grip changing method for folding device and grip changing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely change a grip so as to improve durability by transferring a pull-out binding while sucking it on the outer circumference of a high speed rotation drum by means of a suction means provided with a vacuum pump when it is transferred from a chuck in the high speed rotation drum to a chuck in a speed reducing drum. SOLUTION: A chuck 7 is arranged in a grip drum 3 rotated at a high speed, while a vacuum suction device, which is positioned on the rotating direction rear side close to the chuck 7 and sucks and holds the front end part of a rotationally conveyed pull-out binding 6, is provided. In a sucking action, the surface of the pull-out binding 6 is sucked by means of a vacuum pump 15 onto the outer circumferential face of a suction block 10 from a suction port 8 via the solenoid valve 23, a suction tube 13, a rotary joint 14, and a relay circuit 12 when a solenoid valve 23 is opened. After the pull-out binding 6 is sucked and held on the outer circumference of the suction block 10 and a chuck in a speed reducing drum on the downstream side clamps the front end of the pull-out binding 6, the solenoid valve 23 is closed so as to be stopped. The solenoid valve 23 is controlled to be opened/closed on the basis of a control signal from a controller. In this way, a grip of the pull-out binding 6 can be surely changed, and as a result, the durability of a product can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for replacing a signature in a folding machine such as a web-fed rotary printing press.

[0002]

2. Description of the Related Art FIG. 1 is a schematic view of a main part of a folding machine for a web-fed rotary printing press, and FIGS. 6 and 7 are explanatory views of the operation of a conventional signature folding device for a folding machine. Has been done.

In FIG. 1, 1 is a web, 2 is a folding cylinder, and 3
Is a biting torso on the high-speed rotation side, 4 is a reduction torso on the low-speed rotation side, 24
Is a saw cylinder, 5 is a delivery roller, and 6 is a signature. After the printing, the web 1 is transferred from the direction of arrow Z in FIG. 1 and cut into a predetermined length at a predetermined position by the saw body 24.
The saw cylinder 24 and the folding cylinder 2 are folded into a predetermined size by the folding cylinder 2.
It is delivered as a folded signature 6 to the bite body 3 which rotates at a constant speed. Then, the same signature 6 from the bite body 3
It is delivered to the reduction cylinder 4 whose peripheral speed is relatively slower, or to the delivery roller 5 which is further rotated at the same speed as the reduction cylinder 4 via the reduction cylinder 4. Further, the same folding booklet 6 is transferred onto a running belt and carried out by a downstream impeller (not shown), or is folded again by chopper folding and carried out to the outside.

As described above, the signature 6 is decelerated and transferred from the bite cylinder 3 to the deceleration cylinder 4 when the signature 6 is conveyed at a high speed and is transferred at the chopper fold portion on the downstream side. This is for preventing the signature 6 from coming into contact with the stopper of the same part and causing scratches, or for ensuring the correct folding accuracy.

When the signature 6 is transferred from the bite cylinder 3 to the deceleration cylinder 4 having a transfer speed different from that described above, the following operation is performed. That is, as shown in FIG.
The signature 6 which has been gripped at the tip by the biting claw 7 of the biting body 3 which rotates at high speed and has been rotationally transferred is engaged with the claw 9 of the downstream reduction body 4 as shown in FIG. 6B. 6 is released from the pawl 7 immediately before the operation, and is fed into the gap between the pawl 9 and the pawl receiver 91 which are waiting to be opened in the reduction gear body 4 and is further rotationally transferred.
As shown in (C), the tip is gripped by the closing claw 9 and sent to the next step.

When the signature 6 is transferred from the bite cylinder 3 to the deceleration cylinder 4 having a small peripheral speed in this way, it is difficult to perform simultaneous biting in order to prevent the signature 6 from breaking. It is necessary to give a timing difference such that the claw 7 of the bite body 3 is opened early and then the claw 9 of the deceleration body 4 is closed with a delay. Therefore, the signature 6 is not gripped by any of the pawls 7 and 9 during the transfer, and the signature 6 moves freely as shown in FIGS. 6 (B) and 7 (A). Area) can be created. (It should be noted that a pair of cylinders to be delivered, for example, the reduction cylinder 4
When the peripheral speed is the same as that of the delivery roller 5 and the delivery roller 5, the simultaneous biting state, that is, after the tip of the signature 6 is gripped by the claw 25 of the roller 5 on the downstream side, the trunk 4 on the upstream side is held. The above-mentioned timing can be set such that the nail 9 is opened. ) Therefore, it is required to shorten the time when the signature 6 becomes free as described above.

[0007]

As described above, when the signature 6 is transferred from the bite torso 3 that rotates at a high speed to the speed reducer 4 that rotates in a relatively decelerated state, the nail of the bite torso 3 7
Must be opened earlier, and then the pawl 9 of the reduction cylinder 4 must be closed until the signature 6 can be bite again. Neither the pawl 7 nor the gripper 9 is gripped by the signature 6 during the delivery. A free state in which the signature 6 can be freely moved is created, and as a result, as shown in FIGS.

For this reason, it is required to shorten the time during which the signature 6 is free as much as possible. For that purpose, the peripheral speed of the speed reduction cylinder 4 is increased to the peripheral speed of the biting cylinder 3 which rotates at high speed. It is necessary to bring them closer to each other, or if the difference in peripheral speed between the two cylinders cannot be made small, it is necessary to suddenly (instantaneously) close the claw 9 of the reduction cylinder 4 with a cam. This tendency becomes more remarkable as the peripheral speed increases. In this case, since the claw 9 is driven, a large acceleration is applied, and an excessive impact force acts on the constituent members to reduce the durability thereof. On the other hand, if the strength of the member is increased to obtain the desired durability, the weight of the member is increased, which hinders the reduction in weight and size of the entire apparatus.

An object of the present invention is to avoid the occurrence of a free area at the time of biting a signature and to shift the signature from the high-speed rotating cylinder to the speed reduction cylinder, and to change the bite. It is an object of the present invention to provide a folder in which the signature can be reliably bited by avoiding the rapid opening and closing of the nails and the durability is improved.

[0010]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and the gist of the method is to cut a web and fold it into a predetermined size to produce a signature. When biting the signature from the high-speed rotary cylinder of the machine to a slower or slower speed reducer cylinder, when folding the signature from the high-speed rotary cylinder claw to the speed-reduction cylinder claw, There is provided a method of biting a folding machine, wherein a book is sucked onto the outer periphery of the high-speed rotating cylinder by vacuum suction means equipped with a vacuum pump and transferred.

Means for implementing the above method are as follows:
Cut the web and fold it into a specified size to create a signature,
In the folding machine configured to move the same signature from the high-speed rotating cylinder to the speed-reducing cylinder at a speed lower than or equal to this, through the pawls provided on both cylinders, Re-biting, comprising one or a plurality of suction ports opened on the surface of the body, and suction means connected to the suction ports and sucking the signature into the suction port by a vacuum pump. On the device.

[0012] According to the above method and means, the signature is transferred from the high-speed rotating cylinder (biting cylinder) to the reduction cylinder (biting change).
In some cases, after opening the pawls of the high-speed rotating cylinder, the signature is adsorbed to the high-speed rotating cylinder via the vacuum adsorption means and the adsorption port until the pawls of the speed reduction cylinder are closed. This eliminates the free area in which the signature moves freely between the nails.
Then, the vacuum suction means sucks the signature into the suction port until just before the signature is released from the claws of the high-speed rotating cylinder, and securely grips it with the claws on the speed reducing cylinder side, Release the adsorption. As a result, the free area unlike the conventional one is eliminated, and the signature is not misaligned and obliquely transferred to the reduction cylinder, and the post-process is not disturbed due to defective biting. Further, since it is not necessary to suddenly close the claws of the reduction cylinder, it is possible to greatly extend the durability (life) of the cam, the claw, the claw receiver and the like. In addition, the timing of the claw actuation of both torso during bite replacement can be easily adjusted.

A second means is the above means, wherein a plurality of the suction ports are provided, and the suction ports and the suction means are connected and disconnected at a predetermined timing to connect the signature to the suction port. There is a switching means for switching between suction and stop. According to such means, the signature is always delivered to the deceleration side without any deviation even if there is some error in the opening / closing timing of the claws.

Further, in the above-mentioned second means, the switching means comprises a piston for opening / closing each of the suction ports, and a cam for driving the pistons to open / close the suction ports at a predetermined timing. Is also one of the concrete means of the present invention.
One. In this case, the structure of the switching means is simplified, and since it is a mechanical operation mechanism, it has few failures and has high durability.

Further, in the second means, the switching means includes a suction pipe connecting the suction ports to the vacuum pump, and an electromagnetic valve for opening and closing the suction pipe line at a predetermined timing. It is also a preferable concrete means of the present invention. In this case, the operation timing of the adsorption means can be arbitrarily changed by controlling the opening / closing of the solenoid valve.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to FIGS. 1 and 2 to 5. FIG. 1 is a schematic configuration diagram of a main part of a folding machine for a web-fed rotary printing press, and FIG. 2 is a schematic diagram of a main part of a signature shift device according to a first embodiment of the present invention.

In FIG. 1, 1 is a web, 2 is a folding cylinder, and 3
Is a biting torso on the high-speed rotation side, 4 is a reduction torso on the low-speed rotation side, 24
Is a saw cylinder, 5 is a delivery roller, and 6 is a signature. After the printing, the web 1 is transferred from the direction of arrow Z in FIG. 1 and cut into a predetermined length at a predetermined position by the saw body 24.
The folding cylinder 2 is folded into a predetermined size, and is delivered as a folded signature 6 to the saw cylinder 24 and the biting cylinder 3 rotating at a constant speed with the folding cylinder 2.

Subsequently, the signature 6 is moved from the bite cylinder 3 to the speed reduction cylinder 4 having a relatively low peripheral speed, or further through the speed reduction cylinder 4 and the same speed as the speed reduction cylinder 4. It is delivered to the delivery roller 5 rotating at. Furthermore, the same book 6
Are transferred to a running belt and carried out by a downstream impeller (not shown), or are again folded by chopper folding and then carried out. The above configuration is the same as the conventional one.

The biting device according to the first, second and third embodiments of the present invention shown in FIGS. 2 to 5 has a rotation direction close to the claw 7 provided on the bite body 3 rotating at high speed. It is characterized in that it is provided with a vacuum suction device for sucking and holding the front end portion of the signature 6 which is located on the rear side and is rotationally transferred.

In FIG. 2 showing the first embodiment, 10
Is a suction block attached to the outer circumference of the bite body 3, and one or a plurality of suction ports 8 are opened on the outer circumference of the suction block 10 as in this example in which the outlet is widened. ing. Each suction port 8 is connected to a vacuum pump 15 via a suction pipe 13, a rotary joint 14, and a solenoid valve 23 for opening and closing the suction pipe 13. Reference numeral 12 is a relay passage interposed in the suction pipe 13, and 71 is a bracket which is installed in the space P and supports the claw 7.

In the first embodiment, the suction port 8 is
The suction action is started before the nail 7 of the bite body 3 rotating at high speed is opened. That is, this suction action causes the solenoid valve 23 to open, and the vacuum pump 15 to the solenoid valve 23 and the suction pipe 1
3, the surface of the signature 6 is adsorbed to the outer peripheral surface of the suction block 10 from the suction port 8 through the rotary joint 14 and the relay passage 12.

The above-mentioned suction action is achieved by the signature 6 biting the body 3
The outer periphery of the suction block 10 is suction-held, and the claw 9 of the reduction cylinder 4 on the downstream side securely grips the front end of the signature 6, and then the electromagnetic valve 23 is closed and stopped. The opening / closing control of the solenoid valve 23 is performed by a control signal from a control device (not shown).

3 to 4 show a bite changer according to a second embodiment of the present invention. 3 to 4, a plurality of (four in this example) suction blocks 10 are fixed in the longitudinal direction on the outer periphery of the bite barrel 3 that rotates at a high speed, and the suction blocks 10 are bitten on each suction block 10. A plurality of (three in this embodiment) suction ports 8a, 8 are arranged in the circumferential direction of the body 3.
8b and 8c are opened.

A relay passage 12 is provided in the suction block 10, the inlet side of the relay passage 12 is connected to the vacuum pump 15 through the suction pipe 13 and the rotary joint 14, and the outlet side is through a lateral hole 11. Each of the above suction ports 8a, 8
It is connected to b and 8c.

16a, 16b and 16c are the suction ports 8 described above.
pistons 16a, 16b, 1 which are slidably fitted in a, 8b, 8c and open and close the suction port.
6c is connected to the opening / closing arm 20 via links 17a, 17b, 17c. The opening / closing arm 20 is swingable around the support shaft 19, and the link 17a,
On the side opposite to 17b and 17c, there is provided a contact rod 20a which comes into contact with the cam 18 which is rotationally driven. Reference numeral 21 is a return spring biased to push up the opening / closing arm 20 to the raised position, and 22 is a stopper for setting the raised position.

A plurality of rows (four rows in this example) of suction ports 8a, 8b arranged side by side in the longitudinal direction (axial direction) of the bite body 3 are provided.
As will be described later, 8c is adapted to be opened and closed in an interlocking manner via vacuum switching means. That is, the suction ports 8a to 8c, which are bored at a predetermined angle in the circumferential direction, start operating (suction) from the suction port 8c on the rear side in the rotation direction of the bite body 3, and move to the front side. After all the suction ports 8a have been operated, the suction is controlled so that the suction ports 8a to 8b and 8c on the front side in the rotation direction are sequentially released (non-operating).

The operation will be described in detail below. The signature 6 is a vacuum suction port 8a to 8c which is activated immediately before the claw 7 of the bite body 3 rotating at a high speed and the claw 9 of the speed reducer 4 are rotationally engaged.
The front end is held by suction. Next, the nail 7 of the bite body 3 is opened in the suction holding state. The signature 6 released from the claw 7 is rotatably transferred while being sucked by the vacuum suction ports 8a to 8c, and is sent to the claw 9 of the reduction cylinder 4 which is already open, and the front end thereof is gripped. . After that, the suction port sequentially stops its operation from the front side 8a in the rotational direction by the action of pistons 16a to 16c described later, and the signature 6 is completely handed over to the reduction cylinder 4.

When the opening / closing arm 20 is swung by rotating the cam 18, the pistons 16a to 16c move up and down via the links 17a to 17c, and the suction ports 8a to 8c.
The lateral hole 11 communicated with is opened and closed. This makes it possible to interrupt the vacuum suction force at the suction ports 8a to 8c. With respect to the timing of the operation of the switching device, the point of action is first farther from the swinging and lowering of the opening / closing arm 20 (the spindle 1
9 Distance from center to point of action: l ₁ <l ₂ <l ₃ ) After the suction port 8c has performed suction action, the action is sequentially expanded to 8b → 8a and the smaller suction port having the above distances l _{1 to} l _3. It or,
On the contrary, when the open / close arm 20 is swung up, the lateral hole 11 is sequentially closed from the suction port 8a on the left side having the smaller distance l ₁ , and the suction force is stopped. And the opening / closing arm 2
At the highest position of 0, all the lateral holes 11 are closed and the suction port 8
a to 8c are in the non-operating state.

As described above, the switching device of this embodiment has a simple structure and few failures, and the adsorption operation timing does not shift after initial setting. In addition, since the suction is sequentially released from the front side in the rotation direction of the bite cylinder 3 when it is delivered to the reduction cylinder 4, the signature 6 can be delivered smoothly.

FIG. 5 shows a third embodiment of the present invention. This embodiment is a switching device in the case of providing a plurality of suction ports in the first embodiment, and the configuration and operation of members other than FIG. 5 are the same as those in FIG.

In FIG. 5, 8a, 8b and 8c are shown in FIGS.
Similar to the second embodiment shown in FIG. 4, one of the suction blocks 10 is used.
A plurality (three in this example) of suction ports are provided for each suction port. Each suction port 8a, 8b, 8c has a branch suction pipe 13 branched from a suction pipe 13 connected to a vacuum pump 15.
a, 13b, 13c are connected.

Reference numerals 23a, 23b and 23c are electromagnetic valves for opening and closing the branch suction pipe lines 13a, 13b and 13c, and 14 is a rotary joint. The solenoid valves 23a, 23
b and 23c open (adsorption function) or close (adsorption stop) each of the suction ports 8a, 8b and 8c at the same timing as in the second embodiment by a control signal from a control device (not shown). .

In this embodiment, the structure of the piping system and the like is more complicated than in the second embodiment, but the solenoid valves 23a to 23c are switched by the control device, so the suction and non-suction operation timings are externally applied. It can be changed as desired, and
Not only can the opening / closing operation timing of the suction port similar to that of the second embodiment of FIG. 4 be set, but also a plurality of suction ports 8a to 8c can be simultaneously opened / closed.

The bite changer according to the present invention as shown in the first to third modes is a bite body when transferring the signature 6 from the bite body 3 rotating at high speed to the speed reduction body 4. 3 nails 7
Since the signature 6 is securely supported by the suction force from the vacuum pump 15 until the claw 9 of the reduction cylinder 4 is closed and the front end of the signature 6 is gripped, The position shift of the signature 6 and the shift of the transfer timing are eliminated.

[0035]

The present invention is configured as described above.
According to the method and means of the present invention, when the signature is transferred from the high speed rotating cylinder to the speed reducing cylinder that is decelerating or rotating at a constant speed, the signature is released from the pawls of the high speed rotating cylinder. Until the grip is gripped by the claw, the signature is sucked and supported by the suction port by the vacuum suction means, eliminating the free area unlike the conventional one, and releasing the claw of the high-speed rotating cylinder quickly. Even if there is a timing shift that delays the grip of the reduction cylinder or delays the grasping of the claws of the reduction cylinder, there is no fear that the signature will shift, and the signature can be reliably bited. Further, since it is not necessary to rapidly drive the claws of the reduction cylinder, the durability of parts such as the claws and the driving members for the claws is improved.

Further, if the mechanical drive switching means is used as in the fourth aspect, it is not necessary to particularly consider the weight reduction of the claw portion, the structure is simplified, and the manufacturing cost can be reduced. There will be fewer failures. Further, according to the fifth aspect, it becomes easy to adjust the operation timing of the signature gripping portion in the high speed rotating cylinder, the speed reducing cylinder, etc., and the handleability is improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a main part of a folding machine for a web-fed rotary printing press.

FIG. 2 is a configuration diagram of the signature reshuffling device according to the first embodiment of the present invention.

FIG. 3 is an external perspective view of a biting torso of a signature shifting device according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a suction unit and a switching unit in the second embodiment.

FIG. 5 is an illustration corresponding to FIG. 4 according to the third embodiment of the present invention.

FIG. 6 is a structure and operation explanatory view of a conventional bite shifting device.

FIG. 7 is an explanatory view of the operation of the conventional bite changer.

[Explanation of symbols]

 2 Folding cylinder 3 Biting cylinder (high-speed rotating cylinder) 4 Reduction cylinder 5 Transfer cylinder 6 Folding book 7 Claws 8, 8a, 8b, 8c Suction port 9 Claw 10 Suction block 11 Side hole 13 Suction pipe 15 Vacuum pump 16a, 16b, 16c Piston 18 Cam 20 Open / close arm 23, 23a, 23b, 23c Solenoid valve

Claims (5)

[Claims] 1. A folding machine for cutting a web and folding it into a predetermined size to produce a signature, and transferring the signature from a high-speed rotating cylinder of the folding machine to a speed-reducing cylinder at a speed lower than or equal to that of the cylinder. When changing the bite, when the signature of the signature is transferred from the claw of the high-speed rotating cylinder to the claw of the speed-reducing cylinder, the signature is transferred to the outer periphery of the high-speed rotating cylinder by a suction means equipped with a vacuum pump. A method for changing the signature of a folding machine. 2. A web is cut and folded into a predetermined size to create a signature, and the signature is transferred from a high-speed rotary cylinder to a slower speed or slower speed than this, and to both cylinders. In a folder configured to bite through a provided claw, one or a plurality of suction ports opened on the surface of the high-speed rotating cylinder, and a vacuum pump connected to the suction port, A biting device for a folding machine, comprising a suction means for sucking a signature into the suction port. 3. A plurality of suction ports are provided, and switching means is provided for connecting and disconnecting the suction ports and the suction means at a predetermined timing to switch suction / stop of the signature to the suction port. 3. The folding device of the folding machine according to claim 2, wherein. 4. The folding machine according to claim 3, wherein the switching means includes a piston that opens and closes each suction port, and a cam that drives the piston to open and close the suction port at a predetermined timing. Biting device. 5. The folding according to claim 3, wherein the switching means includes a suction pipe connecting the suction ports to the vacuum pump, and an electromagnetic valve that opens and closes the suction pipe line at a predetermined timing. Machine biting device.