JPH08225242A - Folder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the folding-in of a signature by avoiding the flapping of the signature during gripper changing. SOLUTION: A folding device is provided with a first body 8 for conveying a signature, a folding body 14 rotatably engaged with the first body 8 by a nip, and a signature capturing device 15 for positioning and fixing the signature in the first section of the first body when the signature is transferred from the first body to the folding body. The signature capturing device is wound on a part of the surface of the folding body, brought into contact with the first section 25 of the surface of the first body, and caused to make motion nearly at a signature conveying speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding device including a signature catching device and at least two signature stacking cylinders.

[0002]

2. Description of the Related Art U.S. Pat. No. 4,279,410 discloses a folding device used in a web rotary printing press. In this known device, two transfer cylinders are arranged on the peripheral surface of a pin type stacking cylinder. A tape guide is arranged in a predetermined area of the pin type stacking cylinder from which the signature is taken out, but the tape guide does not reach the nip between the pin type stacking cylinder and the transfer cylinder. . As a result, the trailing edge of the signature may flap. Furthermore, with such a known construction, so-called dock ears, ie folds, occur in the marginal area of the signature.

US Pat. No. 4,490,132 describes
A paper folding machine used in a rotary printing machine is disclosed. In this known configuration, the signature guide tape set is arranged in a predetermined area on the peripheral surface of the stacking cylinder. The gripper cylinder and the delivery cylinder are arranged on the peripheral surface of the stacking cylinder, but in this case, any device is provided for smoothly gripping the signature at the nip between the corresponding signature guide cylinders. Has not been done.

US Pat. No. 4,381,106 discloses that
A stacking cylinder for a rotary folding device is disclosed. A tape series is wrapped around almost half of the circumference of the stacking cylinder. However, this tape series does not reach the gripping range of the signature, that is, the nip between the gripping cylinder and the stacking cylinder.

In US Pat. No. 4,521,007,
A braking brush and a folding device for a rotary printing press are disclosed. The knife-type folding cylinder cooperates with the gripping / pushing cylinder (nip / tuck cylinder). A series of braking brushes are mounted on a swivel lever. With such a braking brush, a part of the signature is pressed more or less against the peripheral surface of the knife-type folding cylinder. However, this braking brush is fixedly installed, and has not reached the grip change range.

German Patent Application Publication No. 3534
No. 157 discloses a folding device. The signatures are transported from the knife cylinder to the gripper cylinder. After the signature is removed from the peripheral surface of the gripper cylinder, it is ejected into the impeller by a number of tape devices. A deceleration unit is arranged on the peripheral surface of the gripper cylinder so that the signature is decelerated before entering the transport device leading to the impeller.

Attempts have been made to improve folding accuracy by using a foam pad or a rubber pad on the peripheral surface of the stacking cylinder for the purpose of pressing the signature to be folded against the gripper cylinder. However, such an arrangement has the following drawbacks. That is, these pads often must be replaced due to wear and cracks. Moreover, with such an arrangement, the signatures are marked when the signatures are pressed against the surface of the gripper cylinder.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to avoid the above-mentioned drawbacks, to prevent the flaps from fluttering when changing the grips, and to prevent the signatures from being folded, so that the signatures are reliably delivered. It is to provide such a folding device.

[0009]

In order to solve this problem, in the structure of the present invention, a first cylinder is provided, and the first cylinder is arranged on the peripheral surface of the first cylinder. At least 1
A first set of transport tapes, which is further provided with a folding cylinder, which has its associated signature catching device. The signature capture device is engaged to cooperate with a predetermined surface section of the first cylinder upon delivery of the signature. Furthermore, the signature catching device moves at about the same speed as the transport speed of the signature being transported.

[0010]

According to the present invention, the signature conveyed along the peripheral surface of the first cylinder has a folding range (that is, the signature is the first
(The range passing from the cylinder to the folding cylinder) is caught by the signature catching device at a point before. As a result, the signature is first
It will remain fixed as it is gripped from the peripheral surface of the cylinder to the peripheral surface of the folding cylinder. For example, the trailing edge of the folding cylinder to be pushed into the gripping mechanism provided in the folding cylinder (or the gripping cylinder) is prevented from fluttering.

In an advantageous configuration of the invention, the signature catching device comprises one or more belts. This belt is wrapped around the circumference of the folding cylinder. The signature catching device extends in contact over a predetermined arc length on the circumferential surface of the first cylinder (ie, transfer cylinder or stack cylinder). Thus, the signature and its trailing edge are controlled and held within the arc length section extending over the length of the signature during gripping from the first cylinder to the folding cylinder, not only for a short time, but by this The folding or other damage of the signature is prevented.

Furthermore, due to the fact that the signature capture device is moved at approximately the signature transport speed, there is also damage to the signature that can occur when there is a significant speed difference between the signature capture device and the signature capture device. Be blocked.

In a further advantageous configuration of the invention, the surface area of the first cylinder contacted by the signature catching device is
It is positioned before the folding area (that is, the gripping area). This folding range extends from the nip between the first cylinder (folding cylinder) and the folding cylinder to the end of the guide device of the first cylinder. Furthermore, this surface area extends from the deflection member to the nip between the two cylinders cooperating with each other.
Since the belt is located in a groove provided on the surface of the folding cylinder and is further wound around a deflection member (for example, a tape roller), the belt comes into contact with the surface area of the first cylinder. .

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a side view of a folding device 1 according to the invention. The folding device 1 is assembled with the delivery module 27. After the signature has been cut from the web of material by the pair of cutting cylinders 2, the signature runs between the first set of transport tapes 4 and the second set of transport tapes 5. The signatures are both transport tapes 4, 5
It is conveyed to the signature catching range 11 via. In the signature catching range 11, the signature is gripped by a grip member (not shown) provided on the peripheral surface of the stacking cylinder 8. Although a stacking cylinder is shown in FIG. 1, it should be understood that the invention is not limited to embodiments that use a stacking cylinder. For example, the barrel may be a transfer barrel.

The first set of transport tapes 4 passes downwardly through the signature catching area 11 and partially overlaps the stacking cylinder 8.
Extends so as to surround the peripheral surface of the. The first set of transport tapes 4 is further wound around a tape diverting roller 18 and guided through a plurality of rollers 10 (see the lower part of FIG. 1). Each tape set has a tensioning device 6 in order to maintain the pre-tensioned state between the first transport tape 4 and the second transport tape 5. As soon as the signature leaves the nip between the two cutting cylinders 2, this signature passes through the S-wrap roller 7. The S-shaped wrap roller 7 is arranged in the conveyance path of the conveyance tapes 4 and 5 between the cutting cylinder 2 and the pair of acceleration cylinders 3.

A guide device 9 corresponds to the peripheral surface of the stacking cylinder 8. This guide device 9 has a first guide section 9.1.
And a second guide section 9.2. The second guide section 9.2 forms the upper end of the folding area 12.
In the folding range 12, the signature is changed between the peripheral surface of the stacking cylinder 8 and the peripheral surface of the gripper cylinder (folding cylinder) 14.

After the gripper is replaced in the folding range 12, the signature is pushed into the gripper mechanism 20 provided on the peripheral surface of the gripper cylinder 14. The signature thus folded is conveyed by the third conveying tape 16. The third carrier tape 16 is partially wound around the gripper cylinder 14.

The signature enters the delivery module 27 and is transported to the signature delivery 28 by the set of the third transport tape 16 and the set of the fourth transport tape 17.

As shown in FIG. 2, in the general-purpose folding device, the stationary braking brush 13 is used to hold the signature on the peripheral surface of the stacking cylinder 8 when the gripper is changed.
It is mounted right under. Since the braking brush 13 does not reach the folding range 12, the movement of the braking brush 13 for controlling the signature, in particular the trailing edge of the signature, is rather limited.

On the other hand, the folding device improved by the present invention has a signature catching device 15 instead of the braking brush 13 (see FIG. 1). The signature catching device 15 is in contact with the peripheral surface of the stacking cylinder 8 over the entire length of the entry area 25. In this way, the signatures, which are supported by the first transport tape 4 and are located on the peripheral surface of the stacking cylinder 8, are captured by the signature capturing device 15, whereby the signatures are delivered to the gripper cylinder 14 in the folding range 12. Up to the peripheral surface of the stacking cylinder 8.

As a result, the signature to be pushed into the gripping mechanism 20 of the gripper cylinder 14 is guided and controlled through the folding range 12. In addition, the trailing edge of the signature, which may cause flapping, is also firmly held on the peripheral surface of the stacking cylinder 8 by the signature capturing device 15. Since the trailing edge of the signature is captured during the folding process, the flapping motion of this trailing edge is eliminated, the so-called dock ear,
In other words, the fold no longer occurs. The signature catching device 15 wound around the peripheral surface of the gripper cylinder 14 is moved at substantially the same speed as the signature. That is, there is no large speed difference between the signature to be conveyed and the signature capturing device 15.

As a result, mechanical stresses applied to the signature are reduced due to the smooth delivery of the signature.
This facilitates the handling of extremely thin signatures cut from webs of lightweight material, for example.

FIG. 3 shows an enlarged view of the entry area 25 shown in FIG. The signature catching device 15 is a gripper 1
4 from the plurality of grooves 19 provided on the peripheral surface. These grooves 19 extend over the entire surface of the gripper cylinder 14, in which case they are axially spaced from one another. As can be seen in FIG. 4, the signature catching device 15 has a number of belts 15.1, each belt 15.1 located in a corresponding groove 19.1 provided on the surface 26 of the gripper cylinder 14. are doing. Belt 15.1
The shape of may be cylindrical or rectangular, for example.

As shown in FIG. 3, the signature catching device 15
Is the tape roller 24 for contacting the peripheral surface of the stacking cylinder 8.
Is being guided through. As a result, the signature capture device 15 is partially pulled away from the surface 26 of the gripper cylinder 14. As shown in FIG. 3, the tape roller 24 is arranged so that the signature catching device 15 contacts the surface of the stacking cylinder 8 over the entire circumferential surface of the arc-shaped entry area 25. As a result, the signatures to be transported along the stacking cylinder 8 are
It is well controlled throughout the delivery process to the gripper cylinder 14. Furthermore, instead of using a single tape roller 24, it is also possible to use a plurality of individual tape rollers corresponding to each belt 15.1.

The signature held on the peripheral surface of the stacking cylinder 8 is held by a folding mechanism 2 using a pushing device (not shown).
Pushed to 0. The gripping mechanism 20 has a gripping segment 40 that is firmly and movably assembled. The movable gripper segment 40 is actuated by the lever 21. The lever 21 has a roller 22, which is driven by the outer contour of the actuating cam 23. The actuating cam 23 is shown in broken lines in FIG. Unlike stationary braking brushes, which do not reach the folding range 12, excellent control of the signature can be performed when changing the torso.

The delivery of signatures to the gripper cylinder 14 is illustrated in detail in FIG. Belt 1 as described above
5.1 is located in the groove 19.1 and this groove 19.1
It is recessed below the surface 26 of the gripper cylinder 14. The gripping segment 40 has a gripping blade holder 50 to which a gripping blade 55 is attached. The gripper blade holder 50 and the gripper blade 55 are segmented so as to lower the belt 15.1 below the signature grip area 91. The belt 15.1 thus does not interfere with the gripper blade 55 as it grips the signature 90.

FIG. 6 shows another embodiment of the present invention used in a pin type folding device. Pull-in roller pair 2
9 conveys the web 30 between the cutting cylinder 31 and the pin-tuck type folding cylinder 33. The web 30 is cut by a knife 32 fixed to the peripheral surface of the cutting cylinder 31. This knife 3
2 cooperates with a grooved bar provided on the peripheral surface of the pin-tuck type folding cylinder 33. The signature is cut by the pin 34
It is fixed to the peripheral surface of 1. Before the signature reaches the folding range 12, the signature is captured by the signature capturing device 15 provided on the peripheral surface of the knife type folding cylinder 33. Pin 34
Is retracted before the signature is pushed into the jaw mechanism 38. The signature is pushed into the folding mechanism 38 by the tucker blade 35 for pushing. As can be seen from FIG. 6, the folding cylinder 33 and the gripper cylinder 37 are the guide device 3
It is partially covered by 6. The guide device 36 extends toward the nip between the folding cylinder 33 and the gripper cylinder 37. The peripheral surface of the gripper cylinder 37 is provided with a groove 19 extending tangentially to accommodate the signature catching device 15. The peripheral surface of the gripper body 37 and the tape roller 24
The signature catching device 15 wrapped around and contacts the circumferential surface of the folding cylinder 33 along the arc-shaped entry area 25. Figure 5
Like the gripper segment 40 shown in FIG. 3, the pushing tacker blade 35 may be segmented or provided with notches so that the signature catching device 15 allows the pushing tacker blade 35 to grip the signature. Do not disturb

[Brief description of drawings]

FIG. 1 is a side view of a folding device according to the present invention.

FIG. 2 is a partial schematic view of a known prior art folding device.

3 is an enlarged view of the approach area shown in FIG. 1. FIG.

FIG. 4 is a cross-sectional view of the folding cylinder shown in FIGS. 1 and 3.

5 is a further enlarged view of the approach area shown in FIG. 3. FIG.

FIG. 6 is a side view showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Folding device, 2 cutting cylinder, 3 accelerating cylinder, 4 1st conveyance tape, 5 2nd conveyance tape, 6 tension | pulling device, 7 S-shaped lap roller, 8 stacking cylinder, 9 guide apparatus, 9.1 1st Guide section, 9.2 second guide section, 10 rollers, 11 signature catching range, 12 folding range, 13 braking brush, 14 gripper cylinder, 15 signature catching device, 1
5.1 Belt, 16 Third Conveying Tape, 17 Fourth Conveying Tape, 18 Tape Deflection Roller, 19
Groove, 19.1 Groove, 20 Folding mechanism, 21
Lever, 22 roller, 23 actuating cam, 24
Tape roller, 25 entry area, 26 surface, 27
Delivery module, 28 signature delivery, 2
9 retracting roller pair, 30 web, 31 cutting cylinder, 32 knife, 33 pin tack type folding cylinder, 34 pin, 35 pushing blade, 36
Guide device, 37 gripper cylinder, 38 gripper mechanism, 40 gripper segment, 50 gripper blade holder, 55 gripper blade, 90 signature,
91 signature grip range

Front Page Continuation (71) Applicant 390009232 Kurfuersten-Anlage 52-60, Heidelberg, Federal Real of Germany

Claims (9)

[Claims] 1. A folding device is provided with a first cylinder for transporting a signature and a folding cylinder rotatably engaged with the first cylinder at a nip. First
Is provided with a signature catching device for fixing the position of the signature to the first section of the first cylinder when it is transferred from the cylinder of the folding cylinder to the folding cylinder. And the signature catching device is
Folding device in contact with a first section of the surface of the body of the stack, and wherein the signature catching device is moving at approximately a signature transport speed. 2. A folding device according to claim 1, wherein the first section of the surface of the first cylinder extends beyond the beginning of the folding range. 3. A second section of the surface of the first barrel,
3. The folding device according to claim 2, further comprising a guide device extending from the second point on the surface of the first cylinder to the end of the folding range. 4. A first section of the surface of the first cylinder extends from a deflection member disposed on the signature catching device to a nip between the stack cylinder and the folding cylinder. The folding device according to Item 1. 5. The folding device according to claim 1, wherein the signature catching device is located in at least one groove provided below the surface of the folding cylinder. 6. The signature catching device comprises a plurality of belts, each belt being located in a respective one of a plurality of grooves provided below the surface of the folding cylinder. 2. Axes are axially spaced from one another.
The described folding device. 7. The folding device according to claim 5, wherein the groove extends circumferentially along the surface of the folding cylinder. 8. A folding device, wherein a first cylinder is provided, and a retractable signature fixing device for gripping a signature is attached to a peripheral surface of the first cylinder. A folding cylinder rotatably engaged at the nip is provided on the first cylinder, and further, when the signature is transferred from the first cylinder to the folding cylinder, the signature is placed on the first section of the first cylinder. A signature catching device for fixing the position is provided, the signature catching device is wound around a part of the surface of the folding cylinder, and the signature catching device is further provided on the first cylinder. A folding device in contact with the first section of the surface and wherein the signature catching device is moving at approximately a signature transport speed. 9. A guide device corresponding to the first cylinder and the folding cylinder is provided, and the guide device is provided on the surfaces of the first cylinder and the folding cylinder respectively from the end of the folding range. The folding device according to claim 8, which extends to a point.