JPH10175770A - Pinless folding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pinless folding machine capable of increasing quality and reducing the number of parts by cutting a web by one stage. SOLUTION: A pinless folding machine is formed so that a pressing blade 44 is installed on a cutting drum 40 provided with a cutting blade 43 capable of cutting web (a) through the entire width as well as sheet retainers 42a and 42b. Also a holding plate 48 for holding the top end of the web (a) which is pressed by the pressing blade 44 as well as a cutting supporter 46 and a holding jaw 47 are installed on a folding drum 41 which is brought in contact with the cutting drum 40. In addition, the web (a) which passes through the cutting drum 40 and the folding drum 41 is cut by one stage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pinless folder for a rotary printing press.

[0002]

2. Description of the Related Art As a pinless folder for a rotary printing press, for example, the one shown in FIGS. 6 and 7 is known. To explain this, reference numeral 1 in FIG. 6 denotes a triangular plate, and a web a (or an unbroken web b) folded into two by the triangular plate 1.
From the pair of first nip rollers 2 and the pair of second nip rollers 3 rotating at the same peripheral speed as the running speed of the web a. Send to device and disconnect.

The speed of the cut web a is rapidly increased by a pair of speed increasing conveyor belts 6, 6 'guided by a pair of guide rollers 15, 15', so that the leading edge of the preceding sheet and the trailing sheet are succeeded. To form a gap S between them (see FIG. 7), and hold the leading end 18 of the succeeding sheet by the claws 8 of the folding cylinder 7 without causing the leading end 18 to interfere with the trailing edge of the preceding sheet. .

[0004] A folding cylinder 7 for increasing the central portion of the succeeding paper to the same peripheral speed as the speed-up conveyor belts 6, 6 '.
The folding blade 9 presses the gripper 10 between the gripper plate and gripper of the gripper device 11 and folds it into two. After that, the conveyor belt 12 → paper discharge impeller 13 → paper discharge conveyor 14 Take out to.

[0005] However, such a pinless folding machine includes:
There were the following problems. That is, after the web a is cut, the web a is accelerated more rapidly than the traveling speed of the web a (increased by about 15 to 40%). The end of the protruding paper is likely to be broken at both ends.
Further, the paper is liable to be inclined, and a failure such as poor folding accuracy is likely to occur. The web a, which is slid while running while being sandwiched by the speed-increasing conveyor belts 6, 6 ', is suddenly fed out (increased speed) after the rear end cutting, so that the position of the leading end of the web a varies, and the leading end of the web a It is difficult for the claws 8 to enter the position where they can be completely determined, and the folding accuracy is low from this point as well. Since the web a is slid between the speed increasing conveyor belts 6 and 6 'before the cutting on the rear side of the web a, the printed pattern on the web a is easily damaged by the belt. The web a is cut while sliding between the speed-up conveyor belts 6 and 6 ', and after cutting, the web a is conveyed while being sandwiched by the speed-up conveyor belts 6 and 6'. Time and skill are required, and the operating rate of the folder decreases. Since the web a is cut while sliding between the speed-up conveyor belts 6 and 6 ′, static electricity is easily generated. If the resistance due to static electricity is not uniform in the width direction of the web a, the web a is twisted and folded. Is oblique to the paper edge, and it is difficult to correct the posture and arrangement of the signatures discharged to the paper discharge conveyor 14. If the web a guided by the speed-increasing conveyor belts 6 and 6 'toward the folding cylinder 7 is jammed between the speed-increasing conveyor belts 6 and 6', it takes a lot of time to remove the web a. Therefore, the operating rate of the folding machine decreases. Since the leading end of the web a with increased speed is held by a plurality of claws 8 arranged in a line in the paper width direction of the folding cylinder 7 with the increased speed, the web a is protruded from both ends of the claw 8 at both ends. In addition to the above, tearing due to swelling of the paper edge in the paper width direction between the nails 8 easily occurs. Further, since the central portion of the cut sheet is folded in a state where the speed of the folding cylinder 7 and the gripping cylinder 10 is increased, the folding accuracy is deteriorated, and it is easy to win. The above phenomenon of ~ items, as the folding machine speeds up,
It gets worse.

In order to solve the above problem, a pinless folding machine has been proposed in Japanese Patent Application Laid-Open No. 7-61705.

As shown in FIG. 4, a web a folded into two by a triangular plate 1 is turned into a pair of first nipping rollers 2 rotating at the same peripheral speed as the running speed of the web a.
Between the pair of second nipping rollers 3 and the first
The sheet is sent between the cutter cylinder 21 and the folding cylinder 23, and is cut intermittently in the paper width direction by a cutting device including the cutter receiver 34 'of the folding cylinder 23 and the saw blades 30 of the first cutter cylinder 21 [FIG.
(A)].

At this time, the belt-surrounding conveyor belt 24 is
The web a cut intermittently in the paper width direction is sandwiched between the lower outer peripheral surface of the folding cylinder 23 and the transport belt 24 around the cylinder to fold with the second cutter cylinder 26. The remaining portion (between the narrow belts of the belt-conveying conveyor belt 24) is fed by the cutting device including the cutter receiver 34 'of the folding drum 23 and the saw blades 31 of the second cutter drum 26. Part) in the paper width direction [Fig.
(B)).

The pressing blade 28 of which the leading end is cut out in the paper width direction so as not to interfere with the pressing blade 28 of the pressing cylinder 27 for the leading end and the conveying belt 24 around the trunk [see FIG. (C)
See], and press in between each claw 32 attached to the folding cylinder 23 and each claw seat 33 attached to the folding cylinder 23.

At this time, there is no interference in the vicinity of the side surface of the claw seat 33 of the folding cylinder 23, so that the leading end of the web a can be pushed into the folding cylinder 23 without any trouble. Each of the pressing blades 28, each of the claws 32, and each of the claw seats 33 are linearly arranged in the same row on the folding drum 23,
The front end of the web a pressed between the web and the claw seat 33 is held in a state of being bent in the radial direction.

The web a held by the folding cylinder 23
Is further rotated and moved together with the folding cylinder 23, and the web a
When the rear end (tail side) of the signature is cut off by the second cutter cylinder 26 and cut off, and the folding blade 29 of the folding drum 23 inserts the central portion of the cut signature into the gripping device 11 of the gripping cylinder 10, Claw 3 of folding drum 23 holding the tip of the signature
2, the signature is folded in two parallel to the cut surface, and then the conveyor belt 12 → the paper discharge impeller 13 → the paper discharge conveyor 1
After 4 passes out of the folding machine.

According to this, it is not necessary to slide the web a between the speed-up conveyor belts as in the above-described single-speed pinless folding machine, so that a printed pattern such as a scratch on the printed pattern on the web a can be prevented. Do not cause. In addition, the generation of static electricity is small, the folding accuracy can be improved, and the posture of the paper discharged onto the paper discharge conveyor 14 can be easily corrected. Further, since it is not necessary to increase the speed of the web a by the speed-up conveyance belt, there is no need to adjust the belt pressure, so that paper jams can be almost eliminated and the operation rate can be improved. And the like.

[0013]

However, the above-mentioned conventional pinless folding machine has the following problems. That is, since the cutting process (two-stage cutting) is performed twice,
The cut surface becomes uneven [see FIG. 5 (d)], and the paper is likely to be jammed in a post-process (delivery), and the paper alignment in the paper stacking and binding device (referred to as a stacker bundler) is poor. Even if a phase adjustment mechanism is configured between the first cutting and the second cutting so that the cut surface does not become uneven, the cutting phase may be changed due to a difference in the state of the paper due to a difference between low and high speeds and a change in the movement of the paper due to a change in the paper quality. Adjustment is required when the machine starts up and when the speed is increased, which is troublesome and increases the amount of waste paper. The first cutting cylinder, the second cutting cylinder, the pressing cylinder for the leading end and many components make maintenance and management cumbersome and increase the size of the apparatus.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pinless folder capable of improving the quality and reducing the number of parts by cutting one step.

[0015]

In order to achieve the above object, a pinless folding machine according to the present invention has a pressing blade on a first cylinder, and a pressing blade on a second cylinder which is in contact with the first cylinder. In a pinless folding machine provided with a claw member for holding a paper pressed by a blade, a paper pressing member is attached to the first and second cylinders and one of the cylinders extends over the entire width of the paper. A cutting blade that can be cut is provided.

[Operation] According to the above-described configuration, the first and second parts are provided.
Immediately after the paper sent between the cylinders is completely cut in one stage, the leading edge of the succeeding paper is held by the claw member and conveyed without widening the paper interval with the preceding paper.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a pinless folding machine according to the present invention will be described in detail with reference to embodiments.

FIG. 1 is a schematic diagram showing an embodiment of a pinless folding machine of a rotary printing press, FIG. 2 is an enlarged view of a main part thereof, and FIG. In these drawings, the same members as those in FIG. 4 are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 1, the web a folded into two by the triangular plate 1 passes through the first nip roller 2 and the second nip roller 3 rotating at the same peripheral speed as the running speed of the web a. It is sent between the cutting cylinder 40 and the folding cylinder 41, where it is cut in one step.

The cut signature is then folded once once by a folding cylinder 41 and a holding cylinder 10 as before, and then sent to a paper discharge device (not shown) by the conveyor belt 12. .

The cutting cylinder 40 is, as shown in FIG.
A cutting device including a pair of front and rear paper presses 42a and 42b and a cutting blade 43 is attached to a part of the outer periphery thereof, and between the paper presses 42a and 42b is located downstream of the cutting blade 43 in the rotation direction. A pressing blade 44 for pressing the cut end of the web a into the folding drum 41 is disposed.

The cutting blade 43 is formed by a single blade capable of cutting over the entire width of the web a, and the pressing blade 44 is set in a bending position (pressing position) via a support lever 45 to a standby position. It is supported so as to be able to swing between positions.

The folding cylinder 41 has a cutting receiver 46 at a part of its outer periphery and a holding jaw 47 located downstream of the cutting receiver 46 in the rotation direction, and a pressing blade corresponding to the holding jaw 47. Web a pressed down by 44
A holding plate 48 holding the front end of the arm is supported by a support lever 49 so as to be swingable between a holding position and a standby position.

The pressing blade 44 and the holding plate 48 as a claw member are staggered in the paper width direction so that the leading ends do not interfere with each other.

The operation of the pinless folder configured as described above will be described with reference to FIG. First, as shown in FIG. 3A, a web a fed by a nipping roller
Enters between the cutting cylinder 40 and the folding cylinder 41 rotating at a peripheral speed equal to the transport speed of the web a, and a single-blade cutting blade 43
Is cut once over the entire width. At this time, the rear end of the cut signature and the front end of the succeeding web a are held by the paper pressers 42a and 42b, respectively.

Next, as shown in FIG. 3B, after the cutting, the pressing blade 44 swings, and the subsequent web a
The leading end is pushed between the cutting receptacle 46 of the folding cylinder 41 and the holding jaw 47.

Thereafter, as shown in FIG. 3 (c), the gripper plate 48 swings and closes, and the leading end of the succeeding web a is gripped between the gripper plate 47 and the gripper jaw 47. Thereafter, the web a is wound around the folding cylinder 41 and enters between the holding cylinder 10 where it is folded once once as before.

As described above, in the present embodiment, since the single cutting blade 43 cuts the entire width at one time, the cut surface does not become uneven as in the conventional two-stage cutting, and the post-cut is not performed. The paper alignment in the paper stacking and binding apparatus in the process is improved.

Further, since only one cutting cylinder 40 is required, and the pressing blade 44 is provided on the cutting cylinder 40 to eliminate the conventional tip pressing cylinder 27, maintenance and management are facilitated by reducing the number of parts. In addition, it is very effective in terms of cost and space.

The present invention is not limited to the above embodiment. The cutting cylinder 40 in the above embodiment may be configured as a cutting receiving cylinder, and a cutting blade 43 may be provided on the folding cylinder 41 side.

Further, instead of the three-body type in the above embodiment, a two-body type of a folding cylinder and a holding cylinder is provided, a holding plate is provided on the folding body, a holding blade is provided on the holding body, and a cutting blade is provided. It may be provided on one of the folding cylinder and the holding cylinder.

In the above embodiment, the holding blades 44 and the holding plates 48 are arranged in a staggered manner in the paper width direction. However, the holding blades 44 are formed short so as to obtain only a trigger for pressing the leading end of the web a.
It is not necessary to make a staggered arrangement if it does not interfere with. Of course, since there is no transport belt as in the conventional case, the pressing blade 44 and the holding plate 48 may be a single plate.

Further, depending on the mechanical configuration, the leading end of the cut web may be configured to be accelerated.

[0034]

As described above, according to the present invention, the first cylinder is provided with the pressing blade, and the paper pressed by the pressing blade is held in the second cylinder in contact with the first cylinder. In the pinless folding machine provided with a claw member for the first and second cylinders, a paper pressing member is attached to the first and second cylinders, and a cutting blade capable of cutting over the entire width of the paper is provided on one of the cylinders. The paper fed between the first and second cylinders is cut by one step, so that quality can be improved and the number of parts can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a pinless folding machine according to the present invention.

FIG. 2 is an enlarged view of a main part in the same manner.

FIG. 3 is an explanatory diagram of the operation.

FIG. 4 is a schematic configuration diagram of a conventional pinless folding machine.

FIG. 5 is an explanatory view showing a defect of the pinless folding machine.

FIG. 6 is a schematic configuration diagram of a different conventional speed increasing single-stage pinless folding machine.

FIG. 7 is an enlarged view of a main part in the same manner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Triangular plate 2 1st nip roller 3 2nd nip roller 40 Cutting cylinder 41 Folding cylinder 42a, 42b Paper press 43 Cutting blade 44 Pressing blade 46 Cutting receiver 47 Holding jaw 48 Holding plate a Web

Claims (1)

[Claims] 1. A pinless folding machine comprising: a first cylinder having a pressing blade; and a second cylinder in contact with the first cylinder, having a claw member for holding the paper pressed by the pressing blade. A pinless folding machine, wherein a paper pressing member is attached to the first and second cylinders, and a cutting blade capable of cutting over the entire width of the paper is provided in one of the cylinders.