JP3241180B2 - Pinless folding machine for rotary printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pinless folder for a rotary printing press.

[0002]

2. Description of the Related Art A conventional pinless folder for a rotary printing press will be described with reference to FIGS. 9 and 10. In FIG. 9, reference numeral 1 denotes a triangular plate, and a web a (band-shaped running paper) folded into two by the triangular plate 1. (Or unbroken web b) (hereinafter referred to as web a) is moved between a pair of first nip rollers 2 and a pair of second nip rollers 3 rotating at the same peripheral speed as the running speed of web a. Is sent to a cutting device including the cutter cylinder 4 and the cutter receiving cylinder 5 for cutting.

The speed of the cut web a is rapidly increased by a pair of speed increasing conveyor belts 6 and 6 'guided by a pair of guide rollers 15 and 15', and the leading edge of the preceding sheet and the trailing sheet And a gap S is formed between them (see FIG. 10), and the claw 8 of the folding drum 7 does not interfere with the leading edge of the succeeding sheet as described later. Bite by.

The central portion of the succeeding paper that has been bitten is bitten by a biting device 11 of a biting cylinder 10 by means of a folding blade 9 of a folding cylinder 7 that has been accelerated at the same peripheral speed as the speed-up transport belts 6 and 6 '. After being pushed into the space between the plate and the bite seat to be folded in two, the sheet is conveyed to the outside of the folding machine via the conveyor belt 12 → the paper discharge impeller 13 → the paper discharge conveyor 14. Before the trailing edge of the paper is cut, the leading end of the web a is fed out by a cutting device including a cutter cylinder 4 and a cutter receiving cylinder 5, and a pair of speed-up conveyance belts 6,
6 ′, the leading end of the web a is a pair of the speed-increasing conveyor belts 6,
Sliding between 6 '.

When the trailing side of the web a is cut, the web a is rapidly accelerated by the pair of speed increasing conveyor belts 6 and 6 ′ and sent to the folding cylinder 7. As shown in FIG.
Is used to bite the succeeding paper between the claw seat 18 and the back 8 of the claw 8 protruding from the circumferential surface of the folding cylinder 7 between the preceding paper and the succeeding paper.
If there is no gap S wider than a, the back portion 8a of the nail 8 interferes with the trailing edge of the preceding paper. This interference is prevented by forming the gap S. The paper biting surfaces of the claw 8 and the claw seat 18 are formed along the circumferential surface of the folding cylinder 7.

[0006]

The conventional pinless folder for a rotary printing press shown in FIGS. 9 and 10 has the following problems. (1) After cutting the web a, the web a is accelerated more rapidly than the running speed of the web a (increased by about 15 to 40%). 6 '
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. (2) Since the web a, which is slid while running while being sandwiched between the speed-increasing conveyor belts 6 and 6 ', is suddenly fed out (increased in speed) after cutting on the buttocks side, the leading end position of the web a varies.
It is difficult for the tip of the web a to enter the fixed biting position of the claw 8, and the folding accuracy is low from this point as well. (3) Before cutting the web a on the bottom side, the speed-up conveyor belts 6, 6 '
Since the web a is slid between the belts, the printed pattern on the web a is easily damaged by the belt. (4) The web a is cut while sliding between the speed-up transport belts 6 and 6 ′, and after cutting, the web a is sandwiched and transported by the speed-up transport belts 6 and 6 ′. Therefore, strict belt pressure adjustment is required.
This requires a lot of time and skill, which lowers the operability of the folder. (5) Since the web a is cut while sliding the web a 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, the fold enters obliquely with respect to the paper edge, and the posture and alignment of the signatures discharged to the paper discharge conveyor 14. Correction becomes difficult. (6) When the web a guided to the folding cylinder 7 by the speed-up transport belts 6 and 6 'is jammed between the speed-up transport belts 6 and 6' (paper jam occurs between the speed-up transport belts 6 and 6 '). Occasionally), it takes a lot of time to remove the web a, and the operability of the folder also decreases from this point. (7) The front end of the web a protruding from the claws 8 at both ends is caught by the plurality of claws 8 arranged in a line in the paper width direction of the folding cylinder 7 at the speed. In addition to the fact that the end portion is easily broken, the end portion between the claws 8 in the paper width direction is likely to be torn due to swelling. In addition, since the central portion of the cutting paper is folded while the speed of the folding cylinder 2 and the biting cylinder 10 is increased, the folding accuracy is low from this time.

The above phenomena (1) to (7) become more and more remarkable as the folding machine speeds up. The present invention has been made in view of the above-described problems, and the object thereof is to significantly reduce obstacles such as edge breaks and poor folding accuracy. In addition, it is possible to prevent end breaks occurring at both ends of the web. Further, the printed pattern on the web does not cause printing trouble such as a belt flaw, and the posture of the paper discharged onto the discharge conveyor can be easily corrected. In addition, the mobility can be improved. Another object of the present invention is to provide a pinless folding machine for a rotary printing press that can eliminate a shift of a cutting position due to a fluctuation in web tension.

[0008]

In order to achieve the above object, a pinless folding machine for a rotary printing press according to the present invention comprises a first cutter cylinder, a second cutter cylinder, and a plurality of cutter cylinders. so
The cutter holder for cutting the web and the knob mechanism are
A folding cylinder arranged at a predetermined interval in the circumferential direction, a tip pressing cylinder corresponding to the knob mechanism, and a plurality of parallel narrow belts are circulated while contacting the lower outer peripheral surface of the folding cylinder. A web transport belt, and feeds the web between the first cutter cylinder and the folding cylinder to cut the web intermittently with the saw blade of the first cutter cylinder and the cutter receiver of the folding cylinder; The sheet is fed between the second cutter cylinder and the folding cylinder by being sandwiched between the folding cylinder and the
The remaining part is cut in the paper width direction by the saw blade of the cutter cylinder and the cutter receiver of the folding cylinder, and the leading end of the web cut in the entire width is pushed into the gripping mechanism of the folding cylinder by the pressing blade of the pressing cylinder for the leading end. It is configured to be gripped and transported by a knob mechanism.

Further, the present invention provides a pinless folding machine for a rotary printing press, wherein a second cutter having a first cutter cylinder and a saw blade moving after cutting is provided.
Cutting the web between the cutter cylinders and these cutter cylinders
Cutter holder and knob mechanism are specified in the circumferential direction of the outer periphery
A folding drum arranged at intervals, and a belt-circulating conveyor belt comprising a plurality of parallel narrow belts and circulating and moving while contacting the lower outer peripheral surface of the folding drum. The paper is sent between the cutter holder of the folding cylinder and cut intermittently in the paper width direction by the saw blade of the first cutter cylinder and the cutter receiver of the folding cylinder. The remaining part is cut in the paper width direction by the saw blade of the second cutter cylinder and the cutter receiver of the folding cylinder, and is sent to the space between the two cutter cylinder and the cutter receiver of the folding cylinder. The saw blade of the second cutter cylinder is configured to be pushed into the gripping mechanism of the folding cylinder to be gripped and transported by the gripping mechanism.

[0010]

The pinless folder for a rotary printing press according to the present invention is constructed as described above. (1) The web is fed between the first cutter cylinder and the folding cylinder to be folded with the saw blade of the first cutter cylinder. The paper is cut intermittently in the paper width direction by the cutter receiver of the cylinder, and then sent between the second cutter cylinder and the folding cylinder by being sandwiched by the folding cylinder and the conveyor belt, and the saw blade of the second cutter cylinder and the cutter of the folding cylinder are sent. The receiving portion cuts the remaining portion in the paper width direction, and pushes the leading end of the web, whose entire width has been cut, into the knob mechanism of the folding cylinder by the pressing blade of the pressing cylinder for the front end, and grips and transports the web by the knob mechanism. (2) The web is sent between the first cutter and the cutter receiver of the folding cylinder, cut intermittently in the paper width direction by the saw blade of the first cutter cylinder and the cutter receiver of the folding cylinder, and then conveyed around the folding cylinder and the cylinder. The remaining portion was cut in the paper width direction by the saw blade of the second cutter cylinder and the cutter receiver of the folding cylinder, and the entire width was cut. The leading end of the web is pushed into the knob mechanism of the folding cylinder by the saw blade of the second cutter cylinder, and is gripped and conveyed by the knob mechanism.

[0011]

【Example】

(First Embodiment) Next, a pinless folding machine for a rotary printing press according to the present invention will be described with reference to the first embodiment shown in FIGS.
1 is a triangular plate, 2 is a pair of first nipping rollers, 3 is a pair of second nipping rollers, 10 is a biting cylinder, 11 is a biting device of the biting cylinder 10, 12 is a conveyor belt, and 13 is a paper discharge blade. A car 14 is a paper discharge conveyor.

Reference numeral 21 denotes a first cutter cylinder, reference numeral 26 denotes a second cutter cylinder, reference numeral 23 denotes a folding cylinder, reference numeral 24 denotes a belt conveyor belt, and the belt conveyor belt 24 comprises a plurality of parallel narrow belts (see FIG. 4). Circulates while contacting the lower outer peripheral surface of the folding cylinder 23. In FIGS. 1 and 2, reference numeral 27 denotes a pressing cylinder for the front end, and 28 denotes a pressing blade of the pressing cylinder 27 for the front end. The pressing blade 28 has a front end portion cut out in the paper width direction so as not to interfere with the conveying belt 24 around the main body. I have. 29 is a folding blade of the folding cylinder 23, 30 is a plurality of saw blades arranged on the first cutter cylinder 21 at intervals in the axial direction, and 31 is disposed on the second cutter cylinder 26 at intervals in the axial direction. With a plurality of saw blades, these saw blades 31 are located between the narrow belts of the above-mentioned waistline conveying belt 24.

1 to 3, reference numeral 32 denotes a claw of the folding drum 23; 33, a claw seat of the folding drum 23; 34 ', a cutter receiver of the folding drum 23;
(See FIG. 3) is the leading end of the web a, and 35 'is the bent end of the web a. The saw blades 30 and 31 are made of metal in the case of cutting by shearing, and made of rubber or synthetic resin in the case of cutting by pressing the saw blades 30 and 31 against the cutter receiver 34 ′. Use things. Further, each of the above-mentioned drums 10, 21, 23, 26, 27, the belt-surrounding conveyance belt 24, and the conveyance belt 12 rotate at the same speed as the traveling speed of the web a.

Next, the operation of the pinless folder for a rotary printing press shown in FIGS. 1 to 3 will be described in detail. A web a (a strip-shaped running paper) (or a web b) that is folded into two by the triangular plate 1 is moved between a pair of first nip rollers 2 rotating at the same peripheral speed as the running speed of the web a. And between the pair of second nipping rollers 3 and between the first cutter cylinder 21 and the folding cylinder 23, and the cutter receiver 3 of the folding cylinder 23
The sheet is intermittently cut in the paper width direction by a cutting device including 4 ′ and each saw blade 30 of the first cutter body 21 (see a cut surface of the first cutter body 21 by the saw blade 30 in FIG. 4).

At this time, the belt-conveying conveyor belt 24 is
The web a, which is intermittently cut in the paper width direction, is sandwiched between the lower outer peripheral surface of the folding drum 23 and the belt-circle transport belt 24 to contact the second cutter drum 26. The sheet is fed to the folding cylinder 23, and the remaining portion (the belt conveyor belt 24) is cut by the cutting device including the cutter receiver 34 'of the folding cylinder 23 and the saw blades 31 of the second cutter cylinder 26.
Is cut in the paper width direction (see the cut surface of the second cutter cylinder 26 by the saw blade 31 in FIG. 4).

The leading end 35 (see FIG. 3) of the web a whose entire width has been cut is pressed by the pressing blade 28 of the front pressing cylinder 27 (the pressing blade 28 whose front end is notched in the paper width direction so as not to interfere with the round conveyor belt 24). )
As a result, each of the saw blades 31 attached to the second cutter cylinder 26 and each of the saw blades 31 and each of the claws 32 (see FIG. 4) attached to the folding drum 23 are pushed (see FIG. 3).

At this time, since there is no interference near the side surface of the claw seat 33 of the folding cylinder 23, the leading end 35 of the web a can be pushed into the folding cylinder 23 without any trouble. In addition, each of the saw blades 31, each of the claws 32, and each of the claw seats 33 are provided with a folding cylinder 23.
The claw 32 and the claw seat 33 are arranged in a straight line in the same row.
The front end 35 of the web a pushed between is bent in a radially bent state (see 35 ').

Then, the web a bitten by the folding cylinder 23 is
The web a is further rotated and moved together with the folding cylinder 23, and the rear end (tail side) of the web a is cut and separated by the second cutter cylinder 26, and the center of the separated paper is held by the folding blade 29 of the folding cylinder 23. When the drum 10 is inserted into the holding device 11, the claw 32 of the folding drum 23 holding the front end 35 of the web a is opened, the paper is folded in two parallel to the cut surface, and then the conveyor belt 12 → the paper discharge impeller. 13 → paper discharge conveyor 1
After 4 passes out of the folding machine.

(Second Embodiment) Next, a pinless folder for a rotary printing press according to the present invention will be described with reference to a second embodiment shown in FIGS. In order to increase the space and improve the operability, the pressing cylinder 27 for the distal end of the first embodiment is not provided, and the bending 35 'of the distal end 35 of the web a is replaced with the saw blade of the second cutter cylinder 26. 31. 5 is a triangular plate, 2 is a pair of first nipping rollers, 3 is a pair of second nipping rollers, 10 is a biting cylinder, 11 is a biting device of the biting cylinder 10, 12
Is a conveyor belt, 13 is a paper discharge impeller, and 14 is a paper discharge conveyor.

Reference numeral 21 denotes a first cutter cylinder, 26 in FIGS. 1 and 2 denotes a second cutter cylinder, 23 denotes a folding cylinder, 24 denotes a waist belt, and the waist belt 24 comprises a plurality of parallel narrow belts. In other words (see FIG. 4), the circulating movement is performed while contacting the outer peripheral surface of the lower part of the folding cylinder 23. In FIG. 5, reference numeral 29 denotes a folding blade of the folding cylinder 23, 30 denotes a plurality of saw blades disposed at an interval in the axial direction on the first cutter cylinder 21, and 31 denotes a plurality of saw blades arranged on the second cutter cylinder 26 at an axial interval. With the plurality of saw blades arranged, these saw blades 31 are located between the narrow belts of the above-mentioned around-body conveying belt 24.

FIG. 8 shows details of the cutter device 41 having the above-mentioned saw blade 31. The cutter device 41 is attached to a saw blade holder 42, a holder receiver 43, a spring 44, a cutter case 45, a lever 47 fixed to one end of a shaft 46 of the cutter case 45, and a tip of the lever 47. It is composed of a cam follower 48 and a cam 49,
By the cam 49 and the cam follower 48, the lever 47, the cutter case 45, and the saw blade 31 swing from the standby position L through the cutting position M to the bending position N about the shaft 46. Further, the lever 47, the cutter case 45, and the saw blade 31 swing in opposite directions to return to the standby position L.

5 and 6, reference numeral 32 denotes a claw of the folding drum 23; 33 denotes a claw seat of the folding drum 23; 34 'denotes a cutter receiver of the folding drum 23;
(See FIGS. 6 and 7) is the tip of the web a, and 35 'is the bent portion of the web a. The saw blades 30 and 31 are made of metal in the case of cutting by shearing, and made of rubber or synthetic resin in the case of cutting by pressing the saw blades 30 and 31 against the cutter receiver 34 ′. Use things.

Each of the cylinders 10, 21, 23, 26, the conveyor belt 24 and the conveyor belt 12 rotate or move at the same speed as the traveling speed of the web a. FIG.
As shown in the figure, the pivotal rotation center point P of the claw 32 of the folding cylinder 23 is set in a direction (arrow X direction) opposite to the rotation direction with respect to a center line connecting the center of the folding cylinder 23 and the center of the second cutter cylinder 26. It is positioned so that the claws 32 do not interfere with the saw blade 31.

Next, the operation of the pinless folding machine for a rotary printing press shown in FIGS. A web a (a strip-shaped running paper) (or a web b) that is folded into two by the triangular plate 1 is moved between a pair of first nip rollers 2 rotating at the same peripheral speed as the running speed of the web a. And between the pair of second nipping rollers 3 and the first cutter cylinder 21.
And the folding cylinder 23 and the cutter receiver 34 ′ of the folding cylinder 23.
The sheet is intermittently cut in the paper width direction by a cutting device including the saw blades 30 of the first cutter cylinder 21 (see the cut surface of the first cutter cylinder 21 by the saw blade 30 in FIG. 4).

At this time, the belt conveyor belt 24 is folded
The web a, which is intermittently cut in the paper width direction, is sandwiched between the lower outer peripheral surface of the folding drum 23 and the belt-circle transport belt 24 to contact the second cutter drum 26. The sheet is fed to the folding cylinder 23, and the remaining portion (the belt conveyor belt 24) is cut by the cutting device including the cutter receiver 34 'of the folding cylinder 23 and the saw blades 31 of the second cutter cylinder 26.
Is cut in the paper width direction (see the cut surface of the second cutter cylinder 26 by the saw blade 31 in FIG. 4).

The cutting edge 35 (see FIGS. 6 and 7) of the web a having the entire width cut is attached to each saw blade 3 of the second cutter cylinder 26.
1 and bent (see 35 'in FIGS. 6 and 7), and pushed between the claws 32 attached to the folding drum 23 (see FIG. 6). At this time, near the side surface of the claw seat 32 of the folding cylinder 23,
Since there is no interference, the leading end 35 of the web a is
3 can be pushed without any trouble. Each saw blade 3
1, each of the claws 32 and each of the claw seats 33 are linearly arranged in the same row on the folding cylinder 23, and the tip 35 of the web a pushed between the claw 32 and the claw seat 33 is bent in the radial direction. It is bitten in the state (see 35 ').

Then, the web a bitten by the folding cylinder 23 is
The web a is further rotated and moved together with the folding cylinder 23, and the rear end (tail side) of the web a is cut and separated by the second cutter cylinder 26, and the center of the separated paper is held by the folding blade 29 of the folding cylinder 23. When the drum 10 is inserted into the holding device 11, the claw 32 of the folding drum 23 holding the front end 35 of the web a is opened, the paper is folded in two parallel to the cut surface, and then the conveyor belt 12 → the paper discharge impeller. 13 → paper discharge conveyor 1
After 4 passes out of the folding machine.

In the second embodiment, the tip 35 of the web a
Is bent by the saw blade 31 of the second cutter cylinder 26, and the pressing cylinder 27 for the front end can be made unnecessary.
There is an advantage that the space around 3 can be widened and operability can be improved.

[0029]

The pinless folder for a rotary printing press according to the present invention is constructed as described above, and can achieve the following effects. (1) The front end 35 ′ of the bent web “a” by the cutter receiver 34 ′ and the knob mechanisms 32, 33 built in the folding cylinder 23.
Is transported by gripping the claw 32 of the knob mechanisms 32, 33.
Does not protrude from the circumferential surface of the folding cylinder 23 to the outside, and it is not necessary to increase the speed of the web a. It is possible to run the web a at a constant speed, perform parallel folding, and discharge the web a. Obstacles such as edge breaks and poor folding accuracy can be significantly reduced. (2) Before performing intermittent cut and full cut,
Is wound around the folding drum 23, and the belt-surrounding conveyance belt 24 and the folding drum 2
3, the cutting position does not vary, and the web a becomes unconstrained when the paper is conveyed between a pair of speeded-up conveyor belts. Can be prevented from being broken at both side edges. (3) Since there is no need to slide the web a between the speed-up conveyor belts as in the related art, a printed pattern such as a scratch on the belt does not occur in the printed pattern on the web a. Further, 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. (4) Since it is not necessary to increase the speed of the web a by the speed-up conveyor belt as in the related art, there is no need to adjust the belt pressure, and it is possible to almost eliminate paper jams and improve the operability. (5) Fold the first cutter cylinder 21 and the second cutter cylinder 26
3, the shift of the cutting position due to the fluctuation of the tension of the web a can be eliminated. Further, the web a is wound around the folding cylinder 26 and cut by the cutters 30 and 31 of the first cutter cylinder 21 and the second cutter cylinder 26. Can also be prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a pinless folder for a rotary printing press according to the present invention.

FIG. 2 is an operation explanatory view of a pinless folder for the rotary printing press.

FIG. 3 is an operation explanatory view of the pinless folder for the rotary printing press.

FIG. 4 is an operation explanatory view of the pinless folder for the rotary printing press.

FIG. 5 is a side view showing a second embodiment of the pinless folder for a rotary printing press according to the present invention.

FIG. 6 is an operation explanatory view of the pinless folder for the rotary printing press.

FIG. 7 is an operation explanatory view of the pinless folder for the rotary printing press.

FIG. 8 is a side view showing a cutter device of the pinless folder for the rotary printing press.

FIG. 9 is a side view showing a conventional pinless folder for a rotary printing press.

FIG. 10 is an operation explanatory view of the pinless folding machine for the rotary printing press.

[Explanation of symbols]

a Web 21 First Cutter Cylinder 23 Folding Cylinder 24 Circumferential Transport Belt 26 Second Cutter Cylinder 27 Pressing Cylinder for Tip 28 Pressing Blade of Pressing Cylinder 27 for Tip 30 Saw Blade for First Cutter Cylinder 21 Saw for Second Cutter Cylinder 26 Blade 32, 33 Knob mechanism 34 'Cutter receiver of folding cylinder 23 35 Tip of web a 35' Bend of web tip 35

Claims (2)

(57) [Claims] And 1. A first cutter cylinder, a second cutter cylinder, which
Cutter receiver for cutting the web between these cutter cylinders , and a knob mechanism are arranged at predetermined intervals in the circumferential direction of the outer peripheral part
A folded cylinder, a tip pressing cylinder corresponding to the knob mechanism, and a body-circulating transport belt that is composed of a plurality of parallel narrow belts and that circulates and moves while contacting the lower outer peripheral surface of the folded cylinder. The paper is sent between the first cutter cylinder and the folding cylinder, and is cut intermittently in the paper width direction by the saw blade of the first cutter cylinder and the cutter receiver of the folding cylinder, and then sandwiched by the folding cylinder and the belt-conveying belt. Then, the remaining portion is cut in the paper width direction by the saw blade of the second cutter cylinder and the cutter receiver of the folding cylinder, and is sent to the space between the second cutter cylinder and the folding cylinder. A pinless folding machine for a rotary press, wherein a pressing blade of a pressing cylinder for a front end is pressed into a gripping mechanism of the folding cylinder, and is gripped and transported by the gripping mechanism. 2. A first cutter cylinder, a second cutter cylinder having a saw blade that moves after cutting, and a waist between these cutter cylinders.
The cutter holder that cuts the blade, and the knob mechanism is the circumference of the outer periphery.
Cylinders arranged at predetermined intervals in the direction, and a belt-circulating transport belt comprising a plurality of parallel narrow belts and circulating and moving while contacting the lower outer peripheral surface of the folding cylinder. The paper is sent between the cylinder and the cutter receiver of the folding cylinder, and is cut intermittently in the paper width direction by the saw blade of the first cutter cylinder and the cutter receiver of the folding cylinder. Then, the remaining portion is cut in the paper width direction by the saw blade of the second cutter cylinder and the cutter receiver of the folding cylinder, and is sent between the second cutter cylinder and the cutter receiver of the folding cylinder. A pinless folding machine for a rotary press, wherein a tip is pushed into a gripping mechanism of the folding cylinder by a saw blade of the second cutter cylinder, and gripped and transported by the gripping mechanism.