JPH10194588A - Two-way folder for printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-way folder for a printer, which has improved operability in singly producing two types of folded page and requires a smaller installation space. SOLUTION: A two-way folder 1 used in a printer, which is used for transversely folding a continuous sheet folded in the former style to produce the first type of folded page 30 and the second type of folded page 30', comprises a single plunger drum 4 adapted to rotate normally and reversely, a first cutter drum 13 for cutting a continuous sheet with its internal cutter blade 15 to produce the first type of folded page 30, and a first gripper drum 17 adapted to grip with the plunger drum 4 with its gripping mechanism to receive the folded page 30 therefrom.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-folding device for a printing press, such as an offset rotary press, which forms two types of signatures.

[0002]

2. Description of the Related Art For example, in a printing press such as an offset rotary press, the imposition of a picture of a signature at the time of bookbinding is shown in FIG.
In some cases, two types of signatures, a first type signature 30 as shown in FIG. 4A and a second type signature 30 ′ as shown in FIG. The first type signature 30 has a needle hole 31 on the lower side of the four-folded signature, and the second type signature 30 ′ has a needle hole 31 on the upper side of the four-folded signature. Is a shape that appears. And these two types of signatures 3
Conventionally, as a folding device for obtaining 0, 30 ', FIG.
7, a first folding machine 36 for a first type of signature 30.
And two second folding machines 37 for the second type of signatures 30 'are known.

That is, a folding device 35 for obtaining two types of signatures of a printing press is provided with a first folding unit 35 provided on a base 49.
It comprises a folding machine 36 and a second folding machine 37,
As shown in FIG. 6, the first folding machine 36 includes a former member 38 for formerly folding the continuous paper (web) W, a nip 39 for making an accurate fold on the formerly folded web W, and a vertical sewing machine for the web W. Vertical sewing machine 4 with eyes
There is provided a folding section 50 for horizontally folding the web W via the horizontal sewing machine 41 for inserting the zero and horizontal sewing machine.

[0004] The folding portion 50 is provided in a one-way rotatable manner in which the web W is pulled by a needle device 42 provided therein and moved along the outer periphery, and is provided adjacent to the projecting cylinder 43. A cutting cylinder 45 having a cutting blade 44 for cutting the web W moving along the outer periphery of the plunging cylinder 43 to a predetermined length; and a cutting cylinder 45 provided below the plunging cylinder 43.
And a biting cylinder 47 which bites the signature 30 formed by cutting with the biting device 46 and receives it from the plunging cylinder 43. The first type signature 30 folded at the folding section 50 is moved from the lower portion of the biting cylinder 47 to the transfer table 4.
8 is sent.

As shown in FIG. 7, the second folding machine 37 is provided with a folding part 50 'including the pushing cylinder 43, the cutting cylinder 44, and the biting cylinder 47. In the folding machines 36 and 37, each body 43 of the folding sections 50 and 50 '
The arrangement positions of 45 and 47 are different. That is, in the folding part 50 ′, the biting cylinder 47 is located above the plunging cylinder 43. The second type of signature 30 ′ folded at such a folding part 50 ′ is sent out from the upper part of the biting cylinder 47 to the carrier table 48 ′. The transfer table 4
8 'is arranged above the biting cylinder 47. And
Such switching between the first folding machine 36 and the second folding machine 37 is performed by switching a clutch or the like (not shown) on the driving side as necessary.

[0006]

However, the conventional 2
In the seed folding device 35, two folding machines 36 and 37 are provided to obtain two types of signatures, a first type signature 30 and a second type signature 30 '. If necessary, it is necessary to switch to the first folding machine 36 or the second folding machine 37, and each time a paper threading or the like is performed, the operability is poor and the switching time is long. Also, since two folding machines 36 and 37 are provided, a large space is required, and it is difficult to install the folding machine in a relatively small factory.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a two-folding device for a printing press which can obtain two types of signatures with one folding device, improves operability, and requires a small installation space. It is in.

[0008]

According to the present invention, there is provided a two-fold folding apparatus for a printing press, which forms a continuous sheet on which a pattern is printed by a printing apparatus and then horizontally folds the continuous sheet to form a first type signature and a second type signature. A two-folding device for a printing press for forming a kind of signature, comprising: a single pushing cylinder that rotates a forward or reverse direction by pulling a formerly folded continuous sheet with a needle device provided therein; The first type of signature is obtained by cutting a continuous sheet, which is provided rotatably adjacent to the plunging cylinder in the radial direction and moves along the outer circumference of the plunging cylinder at the time of normal rotation, with a cutting blade provided therein. The first cutting cylinder to be formed is rotatably provided adjacent to the ramming cylinder in the radial direction, and the first type of signature that moves along the outer periphery of the ramming cylinder is bitten by a biting device provided therein. A first biting cylinder received from the plunging cylinder and a rotatably provided adjacent to the plunging cylinder in the radial direction A second cutting cylinder that forms a second type of signature by cutting a continuous sheet moving along the outer circumference of the plunging cylinder at the time of reverse rotation with a cutting blade provided therein; and a radial direction of the plunging cylinder. A second biting cylinder provided adjacent to and rotatable and receiving a second type of signature cut by the second cutting cylinder with a biting device and receiving the signature from a plunging cylinder. It is assumed that.

[0009] In the above, the first type of signature refers to the one in which the needle hole of the signature folded sideways after forming the former appears on the lower side (below the needle). It means that the needle hole of the signature folded sideways after the former folding appears on the upper side (on the needle). Further, it is preferable that the needle device and the plunging spatula are respectively provided at two positions approximately 180 ° in the radial direction of the plunging cylinder, and that two biting spatulas are provided on the biting cylinder corresponding to the plunging spatula. Is preferred. Further, the first biting cylinder is disposed below the plunging cylinder,
The biting cylinder is preferably arranged above the plunging cylinder.

[0010] In the present invention, the plunging cylinder is provided with the reciprocal 2
Since it can be rotated in the direction, one is provided, and by combining this ramming cylinder with the first cutting cylinder, the first biting cylinder, the second cutting cylinder, and the second biting cylinder, the first kind of signature is used. And the second
It is possible to construct a folding machine for different types of signatures,
Two types of signatures can be obtained with one folding device having one ramming cylinder. In addition, since one folding device is used, it is easy to pass through paper, etc., so that operability is improved as compared with the conventional two devices, a small installation space is required, and the device can be installed in a relatively small factory. Further, particularly in the case of the second type folding machine, the second type folding machine does not need to be provided beyond the first type folding machine on the downstream side in the traveling direction of the web as in the related art. The shorter distance reduces the meandering of the web, thereby improving the folding accuracy of the web.

In the present invention, a drag roller is provided between the former member for formerly folding the continuous paper and the pushing cylinder to pull the continuous paper toward the pushing cylinder, and the first cutting cylinder, the second cutting cylinder, and the The first biting cylinder and the second biting cylinder are disposed at vertically symmetrical positions with respect to a substantially horizontal line connecting the drag roller and the plunging cylinder, and the first cutting, the first biting cylinder, and the second The cutting cylinder and the second biting cylinder are preferably arranged in a crossing manner.

In the present invention, the first cutting cylinder and the second cutting cylinder, and the first biting cylinder and the second
Since the biting cylinder and the biting cylinder are arranged in a well-balanced manner, it is easy to thread the paper and the like, and the operability is improved.

In the present invention, the needle device of the plunging cylinder includes a first-type needle member and a second-type needle member that are arranged near the outer periphery of the plunging cylinder and symmetrically with respect to a radial center line. The first-type needle member is formed so as to protrude and retract from the outer peripheral surface when the plunging cylinder is rotated in the forward direction, and the second-type needle member is retracted when the plunging cylinder is rotated in the reverse direction. It protrudes freely from the surface and the first
The seed needle member is preferably retracted.

In the above, it is preferable that the first-type needle member is disposed on the rear side in the rotation direction at the time of the forward rotation of the push cylinder, and the second-type needle member is disposed on the distal end side in the rotation direction.
In the present invention, only one of the needle members protrudes and the other is retracted when the push cylinder rotates in one direction, so that an extra needle hole is not formed in the signature.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the same members and the same structure as those of the folding machine of the conventional printing press are denoted by the same reference numerals, and the description is omitted or simplified. As shown in FIG. 1, the two-folding device (hereinafter, simply referred to as a two-folding device) 1 of the printing press according to the present embodiment is constituted by one unit.

The two-folding apparatus 1 includes a first folded portion 11 for a first type of signature 30 including one push cylinder 4 and a second folded portion 12 for a second type of signature 30 '. It is provided with. The first folding part 11 includes a first cutting cylinder 13 and a first biting cylinder 17, and the second folding part 12 includes a second cutting cylinder 14 and a second biting cylinder 18.
, Respectively. Then, the first cutting cylinder 13 and the second cutting cylinder 14 and the first biting cylinder 17 and the second biting cylinder 18 are respectively arranged at vertically symmetric positions with respect to the horizontal center line of the plunging cylinder 4. , Has become cross-shaped.

After the former is folded in the former, the perforation cylinder 4 is provided with a vertical perforation and a horizontal perforation, and is pulled by the drag roller 2.
As a result, the web W pulled in is wound around the outer periphery. The push cylinder 4 is rotated in both directions of A direction rotation (which is referred to as forward rotation) and B direction rotation (which is referred to as reverse rotation) indicated by solid lines in FIG. 1 by switching a drive mechanism and a clutch (not shown). Can be rotated. Further, two recesses 4A, 4A are formed in the vicinity of the outer periphery of the push cylinder 4 at positions substantially 180 ° apart in the radial direction, and the needle device 5 is provided in these recesses 4A.

The needle device 5 includes a first needle portion 5A and a second needle portion 5B arranged symmetrically in the rotational direction of the push cylinder 4 with respect to the center line of the push cylinder 4 in the radial direction. Have been. The first needle portion 5A is for the first type signature 30, and the second needle portion 5A
B is for a second type signature 30 '. The structures of these needle portions 5A and 5B are almost the same, and are arranged facing each other.

The first needle portion 5A is connected to the forward rotation (A
Direction) and a needle mounting member 7A that is swingable in the radial direction of the push cylinder 4 and the needle mount 7A is provided along the axis of the push cylinder 4 with a needle drive shaft 6A. While being clamped to
The needle drive shaft 6A can swing with rotation. A first needle 8A, which is a needle member, is mounted on a side of the needle mounting member 7A opposite to the needle drive shaft 6A. The second needle portion 5B is disposed on the rear side of the reverse rotation of the push cylinder 4, and has a needle drive shaft 6B, a needle mounting member 7B,
And a second needle 8B which is a needle member, and is arranged to face the first needle portion 5A as described above. In addition, a cutter receiver 9 is provided between the first needle 8A and the second needle 8B, supported by the plunging cylinder 4.

As shown in FIGS. 2A and 2B, the first needle portion 5A and the second needle portion 5B are connected to a cam mechanism 21 supported by a frame (not shown). Mechanism 21
Are provided with four cams of first to fourth cams 22 to 25. Of these cams, the first and second cams 2
2 and 23 are for the first needle portion 5A, and the third and fourth cams 2
Reference numerals 4 and 25 are for the second needle portion 5B. Note that FIG.
(A) shows the cam and the cam follower 2 in the first folding section 11.
FIG. 2B shows the engagement state between the cam and the cam follower 26 in the second folded portion 12, respectively.

As shown in FIG. 3, the outer peripheral surfaces of these cams 21 and the like have cam curves, and the cam curves have cam followers attached to the tips of the needle drive shafts 6A and 6B via levers 27. 26 are engaged. The cam curves of the first and fourth cams 22 and 25 are formed by dividing a first curved portion C having a large radius and a second curved portion D having a small radius into approximately 180 °. Therefore, when the cam follower 26 is along the first curved portion C,
When the cam follower 26 is raised with the needle drive shaft 6A or the like as a fulcrum, the first needle 8A is lowered, that is, the first needle 8A
Is retracted from the outer periphery of the plunging cylinder 4.

More specifically, referring also to FIG. 1, when the plunger cylinder 4 rotates forward and the first needle 8A hooks the web W, the cam follower 26 becomes the first curved portion C of the large diameter portion.
From the first needle 8A to the second curved portion D of the small diameter portion.
Is a state in which it protrudes from the outer periphery of the pushing cylinder 4 and hooks the web W1. Then, after rotating approximately 180 ° in this state, the web W1 cut by the first cutting cylinder 13 and pushed up by the plunging spatula 10 is moved from the plunging cylinder 4 to the first biting cylinder 17.
At this time, the first needle 8A is moved to the second curved portion D
To the first curved portion C.

The second and third cams 23 and 24 are connected to the first needle 8A.
Alternatively, the second needle 8B is always retracted from the outer periphery of the ramming cylinder 4 in accordance with the rotation direction of the ramming cylinder 4, and has a circular cross-section having the same radius as the radius of the first curved portion C. ing. That is, when the ramming cylinder 4 is rotating forward, the cam follower 26 of the first needle 8A projects and retracts at every 180 ° along the cam curve of the first cam 22 as described above. 2 needle 8B cam follower 2
Reference numeral 6 denotes a state in which the third cam 24 is retracted following the curve. Conversely, when the plunging cylinder 4 is rotating in the reverse direction, the cam follower 26 of the second needle 8B projects and retracts at every 180 ° along the cam curve of the fourth cam 25, and at this time, the first The cam follower 26 of the needle 8A remains retracted following the curve of the second cam 23.

The cam mechanism 21 including the first to fourth cams 22 to 25 is movable in the axial direction of the ram 4 by engaging a clutch (not shown). Correspondingly, the cam follower 26 engages with the first and third cams 22, 24 or engages with the second and fourth cams 23, 25.

A recess 4B is formed on a line orthogonal to a line connecting the two needle devices 5 of the push cylinder 4, and the recess 4B has a push spatula 10 that can project radially outward of the push cylinder 4. , 10 are provided. This plunge spatula 1
0 is a signature 30 or 30 'formed by cutting with a cutter 15 which is a cutting blade of the cutting cylinder 13 or the cutting cylinder 14.
Up half the length of the
Alternatively, it is delivered by being bitten by the biting device 19 of 18. Either one of the plunging spatula 10 can be moved in and out in the radial direction of the plunging cylinder 4 by a cam device or the like (not shown) when the plunging cylinder 4 is operated. Such a needle device 5 is provided at a plurality of positions along the axis of the ramming cylinder 4, and the cutter receiver 9 is continuous along the axis of the ramming cylinder 4.

As described above, two cutting cylinders of the first cutting cylinder 13 and the second cutting cylinder 14 are located at symmetrical positions with respect to the line connecting the dragging cylinder 4 with the drag roller 2 and the pressing roller 3. 4 and are arranged so as to be in contact with each other. The first cutting cylinder 13 rotates corresponding to the ramming cylinder 4 when the ramming cylinder 4 rotates forward, and the second cutting cylinder 14
When the plunging cylinder 4 rotates in the reverse direction, the plunging cylinder 4 rotates corresponding to the plunging cylinder 4. Each of the cutting cylinders 13 and 14 is provided with a cutter 15 serving as a cutting blade for cutting the webs W1 and W2 moving along the outer periphery of the pushing cylinder 4 into a predetermined length. The comparison of the diameters of the push cylinder 4 and the cutting cylinders 13 and 14 is such that when the push cylinder 4 makes one rotation, the cutting cylinders 13 and 14 make two rotations.
The cutters 15 of the cutting cylinders 13 and 14 engage with the cutter receiver 9 of the plunging cylinder 4.

As described above, at positions symmetrical with respect to a line extending from a line connecting the drag cylinder 4 with the drag roller 2 and the pressing roller 3, the push cylinder 4 and the push cylinder 4 are rotated during normal rotation. The two biting cylinders, the first biting cylinder 17 rotating correspondingly and the second biting cylinder 18 rotating correspondingly to the thrust cylinder 4 when the thrust cylinder 4 rotates in the reverse direction, are mutually connected to the thrust cylinder 4. Are arranged so as to be in contact with the outer periphery. Concave portions 17A and 18A are formed on both outer sides (180 ° opposite positions) in the radial direction of the bite cylinders 17 and 18, respectively, and a bite spatula 19 is provided in these concave portions 17A and 18A. The biting spatula 19 bites the raised portion of the signature 30 or 30 ′ pushed up by the plunging spatula 10 of the plunging cylinder 4, and receives the signature 30 or the like to the biting cylinders 17, 18 side. . Therefore, the outer dimensions of the biting cylinders 17 and 18 and the pushing cylinder 4 are the same.

Next, the operation of the present embodiment will be described. First, when a first type signature 30 is requested for a web W on which a picture is printed on a printing machine due to imposition or the like,
The drive system is switched by the clutch to drive the first folded portion 11 including the forward rotation (the direction of the arrow A) of the plunging cylinder 4, and
The cam mechanism 21 is moved to a predetermined position.

The web W folded by the former member 38 is hooked from the drag roller 2 by the first needle 8A of the first needle portion 5A of the ram 4 and rotates forward (in the direction of arrow A) by 180 °. At this time, the upstream side in the flow direction of the web W is cut by the cutter 15 of the first cutting cylinder 13 to form a signature 30 having a predetermined length. This signature 30 is cut and simultaneously pushed up in the outer peripheral direction by the plunging spatula 10 of the plunging cylinder 4, and is bitten by the biting spatula 19, so that the first
It was received by the biting cylinder 17, from which it was further transferred
8 is sent.

When the first needle 8A is hooking the web W1, the cam follower 26 is engaged with the second curved portion D of the first cam 22, and rotates by 180 ° in this state. At this time, the cam follower 26 of the second needle 8B engages with the third cam 24 and remains retracted from the outer peripheral surface of the push cylinder 4. Then, after the first needle 8A rotates by 180 °, it retracts from the outer peripheral surface of the plunging cylinder and rotates by the remaining 180 °.

When a second type of signature 30 'is required, the drive system is switched by a clutch to drive the second folding section 12 including the reverse rotation of the plunging cylinder, and the cam mechanism 21
Is moved to a predetermined position. The web W1 'is caught by the second needle 8B of the second needle portion 5B of the pushing cylinder 4 from the drag roller 2 and rotates in the reverse direction (in the direction of arrow B). The sheet is cut by the cutter 15 of the cutting cylinder 14 to form a signature 30 'having a predetermined length. This signature 30 ′ is cut, and
Is pushed up in the outer peripheral direction by the plunging spatula 10, is bitten by the biting spatula 19, is received by the second biting cylinder 18, and is further sent from the second biting cylinder 18 to the carriage 28 ′. Is done.

When the second needle 8A is hooking the web W, the cam follower 26 moves to the second curved portion B of the fourth cam 25.
And rotates 180 ° in this state. At this time, the cam follower 26 of the first needle 8A is engaged with the second cam 23 and remains retracted from the outer peripheral surface of the push cylinder 4. Then, after rotating the second needle 8B by 180 °, the second needle 8B retracts from the outer peripheral surface of the push cylinder 4 and rotates the remaining 180 °.

According to this embodiment, the following effects can be obtained. That is, the plunging cylinder 4 is composed of the normal and reverse A and B
So that it can rotate in the direction
And the first cutting cylinder 13, the first biting cylinder 17, the second cutting cylinder 14, and the second biting cylinder 18, for the first type signature 30 or the second type signature 30 ′. A folding machine can be constructed, and two types of signatures can be obtained with one folding device having one pushing cylinder 4.

The first folding unit 11 is attached to one folding device 1.
And the second folding part 12 are provided, so that the paper threading and the like can be easily performed, the operability is improved as compared with the conventional two units, a small installation space is required, and the apparatus can be installed in a relatively small factory. Become.

Further, the second cam 23 of the cam mechanism 21 has an inclined portion 23A connected to the second curved portion of the first cam 22.
Since the third cam 24 is formed with the inclined portion 24A connected to the second curved portion of the fourth cam 25, the engagement between the cam and the cam follower 26, that is, the switching between the forward and reverse rotation of the push cylinder 4 is performed. The cam moves smoothly.

[0036]

As described above, according to the two-folding device for a printing press according to the present invention, one ramming cylinder can be rotated in two forward and reverse directions so that one ramming cylinder is provided. By combining the torso, the first biting cylinder, and the second cutting cylinder and the second biting cylinder, a folding machine for a first type signature or a second type signature can be configured, As a result, two types of signatures can be obtained with one folding device having one pushing cylinder. In addition, since one folding device is used, it is easy to pass through paper, etc., so that operability is improved as compared with the conventional two devices, a small installation space is required, and the device can be installed in a relatively small factory. Furthermore, especially in the case of the second type of folding, unlike the conventional case, it is not necessary to provide the second folding machine beyond the first folding machine on the downstream side in the traveling direction of the web, and the traveling distance of the web is shortened. Therefore, there is an effect that the meandering of the web is reduced, thereby improving the folding accuracy.

[Brief description of the drawings]

FIG. 1 is an overall view showing a two-type folding device of a printing press according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a first type of signature cam mechanism and a second type of signature cam mechanism according to the present embodiment.

FIG. 3 is a schematic view showing a shape of a cam according to the embodiment.

FIG. 4 is an overall perspective view showing first and second types of signatures according to the present embodiment.

FIG. 5 is a plan view showing a conventional two-type folding apparatus of the present invention.

FIG. 6 is a side view showing a first folding machine of a conventional two-type folding apparatus of the present invention.

FIG. 7 is a side view showing a second folding machine of the conventional two-type folding apparatus of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 two-folding device for printing press 4 ramming cylinder 5 needle device 5A first needle portion 5B second needle portion 8A first needle 8B as needle member second needle 11B as needle member 11 first folded portion 12 second folded portion 13 First Cutting Cylinder 14 Second Cutting Cylinder 17 First Biting Cylinder 18 Second Biting Cylinder 21 Cam Mechanism 26 Cam Follower 30 First Type Signature 30 'Second Type Signature

Claims (3)

[Claims] 1. A two-type folding device of a printing machine that forms a first type signature and a second type signature by forming a continuous paper on which a pattern is printed by a printing device and then horizontally folding the paper. A single intruding cylinder that rotates the paper in a forward or reverse direction by pulling the former folded continuous paper with a needle device provided therein, and is provided rotatably adjacent to a radial direction of the intruding cylinder. ,
A first cutting cylinder for forming the first type of signature by cutting the continuous paper moving along the outer circumference of the pushing cylinder at the time of normal rotation with a cutting blade provided therein; and a radial direction of the pushing cylinder. Is provided rotatably adjacent to the
A first biting cylinder that receives from the plunging cylinder by biting the first type of signature moving along the outer periphery of the plunging cylinder with a biting device provided therein, and adjacent to a radial direction of the plunging cylinder. Rotatably provided,
A second cutting cylinder for forming the second type of signature by cutting the continuous paper moving along the outer circumference of the pushing cylinder during reverse rotation with a cutting blade provided therein; and a radial direction of the pushing cylinder. Is provided rotatably adjacent to the
A second biting cylinder configured to include a second biting cylinder receiving the second type of signature cut by the second cutting cylinder by the biting device with a biting device. Seed folding device. 2. The two-folding device for a printing press according to claim 1, wherein the continuous sheet is pulled toward the pushing cylinder between a former member for formerly folding the continuous sheet and the pushing cylinder. A drag roller is provided, and the first cutting cylinder and the second cutting cylinder, and the first biting cylinder and the second biting cylinder are vertically symmetrical with respect to a substantially horizontal line connecting the drag roller and the plunging cylinder. And the first
A two-folding device for a printing press, wherein the cutting cylinder and the first biting cylinder and the second cutting cylinder and the second biting cylinder are arranged in a cross-shaped manner. 3. The two-folding device for a printing press according to claim 1, wherein the needle device of the push cylinder is disposed in a symmetrical position near a periphery of the push cylinder with a radial center line interposed therebetween. The first type needle member is formed to include the first type needle member and the second type needle member, the first type needle member protrudes and retracts from the outer peripheral surface when the push cylinder is rotated in the forward direction, and the second type needle member is formed. The second type of printing press, wherein the second type needle member protrudes from the outer peripheral surface so as to be able to protrude and retract from the outer peripheral surface when the ramming cylinder rotates in the reverse direction, and the first type needle member is retracted. Folding device.