JPH05155519A - Folding device for printer - Google Patents

Abstract

PURPOSE:To feed a signature to a next step side surely and smoothly so as to improve the work efficiency of machine by movement controlling a guide plate from being apart form an impeller at the low speed operation of conveyer. CONSTITUTION:When a device is operated at a low speed upon start-up, a guide plate 1 is moved to be apart from an impeller 7 by a pneumatic cylinder 15. Since a guide plate 1 is positioned at a position apart form a side of the impeller 7, printing sheets 10 transferred on a conveyer 8 at a low speed are folded by a crank chopper 5 when they abut against a front abutting plate 4, and a signature 10a is introduced into a gap in the impeller 7 without interference between the signature 10a and the guide plate 1 even if it is introduced into the impeller 7 side from a folding roller 6 side while it is being shifted forwards. When the conveyor 8 has a specified high speed condition after the lapse of specified time, the guide plate 1 is moved to the original position by driving the pneumatic cylinder 15, and accordingly the signalture 10a dropping form the folding roller 6 side at a high speed is guided to a slant facd of the guide plate 1 and introduced into the impeller side 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding device for contacting a front sheet with a printing paper conveyed by a conveyor to fold it and transferring it to the next process side through a folding roller and an impeller. The present invention relates to a folding device for a printing press, which is configured so that a tab can be smoothly transferred without displacement.

[0002]

2. Description of the Related Art In a printing press such as an offset rotary printing press, there are various types of printing paper folding devices.
Among them, there is a type in which the printing paper transferred on the conveyor is folded by a crank chopper while being received by a front contact plate, introduced into the impeller side through a folding roller, and transferred to the next process side. FIG. 3 shows its schematic structure. The printing paper 10 transported on the conveyor 8 contacts the front contact plate 4 at a predetermined position, and is folded by the crank chopper 5 into a signature 10a at that position, sucked by the folding roller 6 and arranged below. Is introduced between the blades of the impeller 7. The introduced signature 10a is sent to the lower side as the impeller 7 rotates, and is conveyed to the next process side by the conveyor 9 arranged below the impeller 7. In the figure, swing means 2
Reference numeral 8 is for reciprocating the crank chopper 5 in the folding direction, rotation drive portion 29 is for rotating the folding roller 6 in the suction direction, and rotation driving source 30 is for rotating the impeller 7. The signature 10a folded by the crank chopper 5 is sucked by the folding roller 6, then falls in a free state and is introduced into the impeller 7. At that time, the signature 10a is in the folding line direction. If it moves freely along the direction, it may not be smoothly introduced to the impeller 7 side. In order to prevent this, a guide plate 31 having an inclined surface 32 is provided on the side of the impeller 7.

[0003]

As shown in FIG. 4, the signature 10a which is brought into contact with the front contact plate 4 and folded by the crank chopper 5 is introduced from the folding roller 6 to the impeller 7 side. At this time, as shown in the drawing, one end side of the signature 10a in the folding line direction hits the inclined surface 32 of the guide plate 31, and is guided into the impeller 7 while being restricted from moving in the folding line direction. Therefore, the signature 10a is smoothly delivered from the folding roller 6 side to the impeller 7 side. on the other hand,
The position of the front contact plate 4 and the folding timing of the crank chopper 5 are set on the basis of the case where the conveyor 8 that transports the printing paper 10 is moving at a constant high speed state.
Therefore, when the printing paper 10 is transferred at a high speed, the printing paper 10 shown in FIG.
As shown in Fig. 5, the signature 10a is smoothly delivered to the impeller 7 side, but when the conveyor 8 is at a low speed, the printing paper 10 is folded by the crank chopper 5 before hitting the front backing plate 4, and as shown in FIG. As shown in the figure, the signature 10a is fed from the folding roller 6 to the impeller 7 side at a position retracted with respect to the front contact plate 4. Therefore, the signature 10a interferes with the guide plate 31,
The problem of not falling smoothly occurs. Then, in the worst case, the signature 10a is caught by the guide plate 31 and cannot be delivered to the impeller 7 side, and the machine must be stopped.

The present invention solves the above problems, and provides a folding device for a printing machine, which can smoothly transfer signatures and prevent a decrease in the machine operating rate regardless of the low and high speed feeding of the conveyor. The purpose is to

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention folds a print sheet conveyed by a conveyor by a crank chopper while receiving it by a front cover plate, and folds a signature by folding rollers. In a folding device that is introduced into a vehicle and is transported to the next process side, a guide plate that limits the positional deviation of the folding direction line (conveyor transport direction) of the signature sent from the folding roller to the side of the impeller. And a moving mechanism part for moving the guide plate in a direction of moving toward or away from the impeller side, the moving mechanism part separating from the impeller side when the printing paper is transported at a low speed. The folding device of the printing press is configured so as to be moved and positioned to the position.

[0006]

When the conveyor speed is low, the moving mechanism portion connected to the guide plate moves the guide plate to a position away from the impeller. When the conveyor moves to a predetermined high speed,
The moving mechanism is automatically controlled, and the guide plate is close to the impeller side and positioned so as to smoothly guide the signature sent from the folding roller side at high speed to the impeller side.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the overall structure of this embodiment, and FIG. 2 is a side view of FIG. 1 and 2, the folding device includes a front contact plate 4 on which the end surface of the printing paper 10 transferred on the conveyor 8 is in contact and positioned, a crank chopper 5 for folding the printing paper 10, and a folded folding device. Ding 10a
1, a folding roller 6 that sucks into the gap between the pair of rollers and guides it to the lower side in FIG. 1, an impeller 7 that holds the signature 10a and sends it to the lower conveyor 9 in FIG. 1, and the main configuration of this embodiment. A guide plate 1 that is an element, a moving mechanism unit 2 that moves the guide plate 1, and a control device 3 that automatically controls the moving mechanism unit 2 and the like.
Etc.

As shown in FIGS. 1 and 2, the guide plate 1 is composed of a plate member whose base end is pin-supported by a pin 13 on a support bracket 12 fixed to a fixed side 11 of the machine, and its free end. On the side, an inclined surface 14 that is inclined in a direction away from the impeller 7 is formed. The guide plate 1 is arranged relatively close to one end of the impeller 7.

In this embodiment, the moving mechanism 2 comprises an air cylinder 15 which is connected to the guide plate 1 by a pin 16 and is connected to the controller 3 via a flow control mechanism (not shown) or the like.
The controller 3 is connected to each drive unit such as the crank chopper 5, the folding roller 6, the impeller 7, the conveyor 8 and the like, and controls their speeds synchronously, and the air cylinder 15 corresponding to the speed of the conveyor 8 is connected. Is configured to control the operation of the. More specifically, the control device 3
Operates so as to move the guide plate 1 in a direction away from the impeller 7 side when the conveyor 8 or the like is operated at a low speed or at a low speed immediately after starting. In the present embodiment, when the rotation speed of the normal impeller 7 is 400 rpm, the low speed operation is about 100 rpm.

The front contact plate 4 is attached to the fixed side of the machine so as to be movable back and forth along the transfer direction of the conveyor 8. In addition,
The motor 20 shown in FIG. 2 is for automatically moving the front contact plate 4 back and forth (detailed structure is omitted).

As shown in FIG. 2, the crank chopper 5 engages the printing paper 10 and folds it into the chopper plate 1.
7, a swing rod 18 connected to a swing means (not shown) to reciprocate the chopper plate 17 in the vertical direction in the figure, and an arm portion reinforced and installed between the chopper plate 17 and the swing rod 18. It is composed of 19 etc.

The folding roller 6 is composed of a pair of rollers 22 and 22 arranged to face each other with a gap 21 in between, and rotary shafts 23 and 23 for rotating the rollers 22 and 22 inward.
The signature 10a folded by the chopper plate 17 of the crank chopper 5 is sucked into the gap 21 between the rollers 22 and 22 and introduced to the impeller 7 side.

The impeller 7 is arranged below the folding roller 6, and in this embodiment, it comprises three impellers 7 connected by a rotary shaft 24. As shown in FIG. 2, the impeller 7 has a plurality of spiral blades 25 formed around the rotary shaft 24 at an equal pitch, and is folded by a folding roller 6 into a gap 26 between the adjacent blades 25 and 25. The signature 10a is introduced and held. The signature 10a held in the gap 26 is discharged to the conveyor 9 side when the impeller 7 rotates and the signature 10a approaches the conveyor 9 side as shown in FIG. A baffle plate 27 is arranged between the impellers 7 and 7 to prevent the signature 10a discharged toward the conveyor 9 from moving backward and coming off the conveyor 9.

Next, the operation of this embodiment will be described. As described above, the crank chopper 5, the folding roller 6, the impeller 7, the conveyor 8, the conveyor 9 and the like are all the control device 3
Is controlled in synchronization with. The device is operated at a low speed for a period of, for example, about 10 seconds from the time of start-up, and at a predetermined high speed after a predetermined time elapses. During the low speed, the air cylinder 15 moves the guide plate 1 in the direction away from the impeller 7 as shown by the chain double-dashed line in FIG. Since the guide plate 1 is pin-supported by the support bracket 12 by the pin 13, it can be easily moved in the above-mentioned direction. Since the guide plate 1 is arranged at a position away from the side of the impeller 7, the printing paper 10 transported at a low speed on the conveyor 8 is folded by the crank chopper 5 before contacting the front contact plate 4. Even if it is introduced from the folding roller 6 side to the impeller 7 side in a state of being shifted toward the front, the signature 10a and the guide plate 1 do not interfere with each other. for that reason,
The signature 10a is introduced into the gap 26 between the blades 25, 25 of the impeller 7. When the conveyor 8 reaches a predetermined high speed state after a predetermined time elapses, the control device 3 drives the air cylinder 15 to move the guide plate 1 to the original position. Therefore, the signature 10a falling at a high speed from the folding roller 6 side is guided by the inclined surface 14 of the guide plate 1 and introduced to the impeller 7 side. Although the operation of the device at the low speed state at the time of startup has been described above, the guide plate 1 is separated from the impeller 7 side in the same manner as described above not only at the time of startup but also when the conveyor 8 is operated at low speed. Is moved to the correct position. Due to the above, signature 1
0a is smoothly sent to the next process side without interfering with the guide plate 1.

In the present embodiment, the guide plate 1 has the illustrated structure, but the present invention is not limited to this. Further, in this embodiment, the guide plate 1 is described as being separated from the impeller 7 only in the low speed state, but the separated position of the guide plate may be variably controlled according to the speed of the conveyor or the like. Further, although the air cylinder 15 is adopted as the moving mechanism portion 2 of the guide plate 1 in this embodiment, other means such as a motor may of course be used.

[0016]

According to the present invention, the following remarkable effects are exhibited. (1) Even if the printing paper is sent at a low speed, folded in front of the front cover plate and sent to the impeller side, the guide plate is positioned at a position separated from the impeller, so the signature is Do not interfere. Therefore, the trouble such as the signature being caught does not occur, and the signature is smoothly sent to the next process side. (2) Since the machine does not stop due to the signature being caught or the like, the machine operating rate can be improved. (3) When the printing paper is transported at normal high speed,
Since the guide plate is automatically positioned at a position where the guide function can be exerted, even when the speed is high, the position of the signature does not shift and the sheet is smoothly sent to the next process side. (4) The guide plate and the moving mechanism for moving the guide plate have a relatively simple structure, and can be easily implemented at low cost. Of course, it can also be applied to an existing device.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a front view showing the overall structure of a conventional folding device.

FIG. 4 is a partial front view for explaining the operation of the conventional folding device.

FIG. 5 is a partial front view for explaining a caught state of a signature in a conventional folding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide plate 2 Moving mechanism part 3 Control device 4 Front contact plate 5 Crank chopper 6 Folding roller 7 Impeller 8 Conveyor 9 Conveyor 10 Printing paper 10a Folding signature 11 Fixed side 12 Support bracket 13 pin 14 Sloping surface 15 Air cylinder 16 pin 17 Chopper plate 18 Swing rod 19 Arm part 20 Motor 21 Gap 22 Roller 23 Rotating shaft 24 Rotating shaft 25 Blade 26 Gap 27 Baffle plate 28 Swinging means 29 Rotating drive part 30 Rotating drive source

Claims (1)

[Claims] 1. A folding device, in which a printing paper transported by a conveyor is folded by a crank chopper while being received by a front contact plate, and a signature is introduced into an impeller through a folding roller and transported to the next process side. A guide plate for limiting the positional deviation of the folding direction line (conveyor transfer direction) of the signature sent from the folding roller is provided on the side of the vehicle, and the guide plate is moved toward or away from the impeller side. A folding mechanism for a printing machine, wherein a moving mechanism portion that moves in a direction is provided, and the moving mechanism portion is moved and positioned to a position away from the impeller side when the printing paper is transported at a low speed. ..