JP2007326189A - Rotary type cutting device, folding machine, and rotary press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary type cutting device which easily and accurately cuts even an easily displaceable plate-like material. <P>SOLUTION: The cutting machine 35 is equipped with: a first cylinder 47 and a second cylinder 49 which are disposed with a traveling web 19 in between and rotating driven in the opposite direction to each other; at least a first cutting blade 51 and a second cutting blade 53 of straight blades, which are provided on the first cylinder 47 and the second cylinder 49 so as to be extended in the axial line direction. The cutting machine 35 cuts the web 19 with the first cutting blade 51 and the second cutting blade 53 by rotating the first cylinder 47 and the second cylinder 49, and is equipped with a first downstream pressing member 79 and a second downstream pressing member 81 for holding the web 19 in cutting with the first cutting blade 51 and the second cutting blade 53 in the vicinity of the cutting blade 51 and the second cutting blade 53. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotary cutting device, a folding machine equipped with the rotary cutting apparatus, and a rotary printing press.

In a folding machine of a rotary printing press, for example, a saw cylinder is used to cut a web in the width direction as disclosed in Patent Document 1. Since this saw body uses a saw blade, the cut portion becomes jagged, and it does not necessarily look good as a product.
For example, there is a rotary shear as shown in Patent Document 2 as a material that can obtain a beautiful cutting part.
This is because a pair of cylinders that are rotationally driven in opposite directions to each other are attached with a cutting blade of a straight blade provided so as to extend in the axial direction, and bites a plate-like material between the cutting blades. It is cut like a cocoon.
In order to perform good cutting, it is necessary to securely bite the plate-like material between the blades.

JP-A-11-278746 Japanese Patent Publication No.58-37094

  However, when the rotary shear shown in Patent Document 2 is used, for example, for web cutting of a rotary printing press, the web used for printing is easily displaced when it hits the cutting blade. It becomes difficult to cut by tilting or flapping. This also has a problem that the cutting accuracy is deteriorated.

  SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a rotary cutting device that can easily and accurately cut even a plate material that is easily displaced, a folding machine using the same, and a rotary printing press. And

In order to solve the above problems, the present invention employs the following means.
That is, the rotary cutting device according to the present invention is arranged with a traveling plate-like material sandwiched therebetween, and a pair of rotary shafts that are rotationally driven in opposite directions to each other, and extends in the axial direction of the respective rotary shafts. A rotary cutting device that cuts a plate-like material with the pair of cutting blades by rotating the pair of rotary shafts. In the vicinity of the blade, a pressing member that holds the plate-like material when being cut by the cutting blade is provided.

According to the present invention, since the plate-like material is held by the pressing member provided in the vicinity of the cutting blade at the time of cutting by the cutting blade, sufficient tension can be applied to the plate-like material.
When sufficient tension is applied to the plate-like material, even if the plate-like material is easily bent, it can resist the pressing force of the cutting blade, so that the displacement of the plate-like material can be limited.
Thereby, since the plate-shaped material does not tilt or flutter with respect to the cutting blade, it can be easily and accurately cut.
Further, since it is a straight cutting blade, it can be cut cleanly in a straight line.

  In the rotary cutting device according to the present invention, the pressing member is provided on the downstream side in the rotation direction of the cutting blade.

Thus, since the pressing member is provided on the downstream side in the rotation direction of the cutting blade, the plate-like body is held with the cutting blade sandwiched between the continuous upstream side and the pressing member.
For this reason, since sufficient tension | tensile_strength can be provided to a plate-shaped material at the time of the cutting | disconnection by a cutting blade, the displacement of a plate-shaped material can be restrict | limited.
Thereby, since the plate-shaped material does not tilt or flutter with respect to the cutting blade, it can be easily and accurately cut.

  Moreover, the rotary cutting device according to the present invention is characterized in that the pressing member is provided on the upstream side in the rotation direction of the cutting blade.

Thus, since the pressing member is provided on the upstream side in the rotation direction of the cutting blade, the vicinity of the upstream cutting portion that is freed by cutting can be held.
Holding the vicinity of the upstream cutting section can prevent the upstream free end from flapping, and can prevent the cutting line from progressing in an unexpected direction regardless of the cutting by the cutting blade.

  The folding machine according to the present invention is characterized in that the rotary cutting device according to any one of claims 1 to 3 is used as a web cutting means.

  As described above, since the rotary cutting device according to any one of claims 1 to 3 is used as a web cutting means, the web can be easily and accurately cut, and clean in a straight line. It can be cut to obtain a clean and high-quality printed matter.

  A rotary printing press according to the present invention includes the folder according to claim 4.

  Thus, since the folding machine described in claim 4 is provided, a beautiful and high-quality printed matter can be obtained.

According to the present invention, since the pressing member for holding the plate-like material is provided in the vicinity of the cutting blade when cutting with the cutting blade, the plate-like material can be cut easily and accurately. Can do.
Also, it can be cut cleanly in a straight line.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
In the present embodiment, the present invention is applied to a blanket facing rotary printing machine that performs multicolor printing on both sides of a web.
FIG. 1 is a schematic diagram illustrating an overall schematic configuration of a rotary printing press 1.
The rotary printing machine 1 includes a paper feeding device 3, an infeed device 5, a printing unit 7, a drying device 9, a cooling device 11, a web pass unit 13, and a folding machine along the web traveling direction 20. 15 and a paper discharge device 17 are provided.

The paper feeding device 3 supplies a web (plate-like material) 19 and is configured to hold two paper rolls 21 on which the web 19 is wound in a roll shape.
When paper is fed from one paper roll 21, the other paper roll 21 is mounted and paper splicing preparation is made. When the web 19 of one paper roll 21 is reduced, the web 19 is spliced to the web 19 of the other paper roll 21. Then, while the web 19 is being supplied from the other paper roll 21, one of the paper rolls 21 is mounted to prepare for paper splicing.
In this way, the web 19 is continuously fed out from the paper feeding device 3 toward the downstream side.

The infeed device 5 has a function of adjusting the tension of the web 19 from the paper feeding device 3 and supplying it to the printing unit 7.
The printing unit 7 is provided with as many printing units 23 as the number of printing colors.
In the present embodiment, four printing units 23 are provided, which respectively print cyan, yellow, magenta, and violet, and perform color printing using a mixed color of these.

The printing unit 23 is provided with two sets of a plate cylinder 25 and a blanket cylinder 27. Each set of blanket cylinders 27 is arranged opposite to each other with the web 19 interposed therebetween, and functions to mutually apply printing pressure.
A dampening device and an inking device (not shown) are provided on the peripheral surface of each plate cylinder 25. The dampening device supplies dampening water to the printing plate attached around the plate cylinder 25, and the inking device supplies ink to the printing plate.

The drying device 9 has a function of heating and drying the web 19 printed on both sides by the printing unit 7.
The cooling device 11 is provided with a plurality of cooling drums 29, and the webs 19 are cooled by passing the webs 19 heated by the drying device 9 so as to contact the peripheral surfaces of the respective cooling drums 29.
The web path unit 13 has a function of adjusting the tension of the web 19 and supplying the web 19 to the folding machine 15, and has a cutting function of longitudinally cutting the web 19 as necessary.

The folding machine 15 includes a triangular plate 31, a nip roller 33, a cutting machine (rotary cutting device) 35, a conveyor belt device 37, a folding cylinder 39, a gripping cylinder 41, and a conveyor belt 43. Yes.
The triangular plate 31 vertically folds the web 19 or rotates the traveling direction of the surface of the web 19 by 90 degrees while keeping the narrow web 19, for example, the web 19 vertically cut by the web path unit 13. .

The nipping roller 33 is composed of a pair of rollers that sandwich the web 19.
The nipping roller 33 is rotated at a slightly higher peripheral speed than the web 19 and applies tension to the upstream web 19 and sends it to the downstream side.

The cutting machine 35 cuts off (cuts) the web 19 in the width direction to form a sheet 45.
2 is a perspective view schematically showing the cutting machine 35, and FIG. 3 is an end view taken along line XX of FIG.
The cutting machine 35 includes a first cylinder 47 and a second cylinder 49. The 1st cylinder 47 and the 2nd cylinder 49 are arrange | positioned on both sides of the web 19, and comprise the pair of rotating shaft of this invention.
The first cylinder 47 and the second cylinder 49 are rotationally driven in opposite directions by a drive source (not shown). That is, the rotation direction 30 of the first cylinder 47 is clockwise in FIG. 3, the rotation direction of the second cylinder 49 is counterclockwise in FIG. 3, and the opposite direction is the same as the traveling direction 20 of the web 19 respectively. Configured to move in the direction.

The first cylinder 47 includes a first cutting blade 51 provided so as to extend in the axial direction, and the second cylinder 49 includes a second cutting blade 53 provided so as to extend in the axial direction. It has been.
As for the 1st cutting blade 51 and the 2nd cutting blade 53, the blade of the front-end | tip is made into the straight blade, and comprises the pair of cutting blade of this invention.
The blade portion 52 of the first cutting blade 51 is provided on the upstream side in the rotation direction 30, while the blade portion 54 of the second cutting blade 53 is provided on the downstream side in the rotation direction 40.
For this reason, the first cutting blade 51 rotates so as to precede the second cutting blade 53.
The first cutting blade 51 and the second cutting blade 53 are attached in a twisted form from one end side to the other end side, and the blade portion 52 and the blade portion 54 are sequentially bited from one end side to the other end side. It is configured as follows.

The first cylinder 47 is provided with a first cylinder body 55 and a first mounting base 57.
The first cylinder body 55 has a substantially cylindrical shape, and an intermediate portion is cut into a substantially semicylindrical shape. A shaft portion is provided at both ends of the first cylinder body 55, and the shaft portion is rotatably supported by a frame (not shown).
A pair of protrusions 59, 59 extending in the width direction are provided in the notch portion of the first cylinder body 55 with a gap therebetween.

The first mounting base 57 is fitted between the pair of protrusions 59 and 59 and fixedly attached by mounting bolts 61 and 61.
The mounting position can be adjusted by the positions of the mounting bolts 61, 61, and the contact state between the first cutting blade 51 and the second cutting blade 53 can be adjusted.
A blade attachment base 63 for attaching the first cutting blade 51 is provided to protrude upstream of the first attachment base 57 in the rotation direction 30.
The first cutting blade 51 is attached to the surface of the blade mounting base 63 on the downstream side in the rotation direction 30 with a bolt 65.

The second cylinder 49 is provided with a second cylinder body 67 and a second mounting base 69.
The second cylinder body 67 has a substantially cylindrical shape, and an intermediate portion is cut into a substantially semicylindrical shape. A shaft portion is provided at both ends of the second cylinder body 67, and the shaft portion is rotatably supported by a frame (not shown).
A pair of projections 71, 71 extending in the width direction are provided in the notch portion of the second cylinder main body 67 with a space therebetween.

The second mounting base 69 is fitted between the pair of protrusions 71 and 71 and fixed by mounting bolts 73.
On the downstream side in the rotational direction 40 of the second mounting base 69, a blade mounting base 75 for mounting the second cutting blade 53 is provided so as to protrude.
The second cutting blade 53 is attached to the surface on the upstream side in the rotational direction 40 of the blade mounting base 75 with a bolt 77.

A first downstream pressing member (pressing member) 79 is attached to the downstream side of the first cutting blade 51 in the rotation direction 30.
A second downstream pressing member (pressing member) 81 is attached downstream of the second cutting blade 53 in the rotation direction 40.
The first downstream pressing member 79 is a plate-like body having a rectangular cross section and a length extending over the entire length of the first cutting blade 51.
The outer end of the first downstream pressing member 79 is located at a position substantially equivalent to the tip of the first cutting blade 51.

The second downstream pressing member 81 is a plate-like body having a substantially rectangular cross section and a length extending over the entire length of the second cutting blade 53.
The second downstream pressing member 81 is thicker than the first downstream pressing member 79 by about the thickness of the first cutting blade 51. A projecting portion 83 that projects outward from the tip of the second cutting blade 53 is provided at the downstream tip of the second downstream pressing member 81.
The protruding portion 83 is configured to hold the web 19 in cooperation with the first downstream presser member 79 at the time of cutting, that is, before and after the first cutting blade 51 and the second cutting blade 53 are engaged. Yes.
The first downstream pressing member 79 and the second downstream pressing member 81 are formed of an elastic material, for example, sponge, rubber or the like, and maintain the holding force of the web 19 by engaging and elastically deforming both. is there.
The material is selected depending on the amount of elastic deformation required, but rubber is preferable from the viewpoint of holding force.

A first upstream presser member (presser member) 85 is attached upstream of the first cutting blade 51 in the rotational direction 30.
A second upstream presser member (presser member) 87 is attached upstream of the second cutting blade 53 in the rotational direction 40.
The first upstream presser member 85 has a substantially rectangular cross section and a length that extends over the entire length of the first cutting blade 51.
A protruding portion 89 that protrudes outward is provided at the upstream end of the first upstream pressing member 85. The outer end of the projecting portion 89 is located at a position substantially equivalent to the tip of the first cutting blade 51.

The second upstream pressing member 87 is a plate-like body having a substantially rectangular cross section and a length that extends over the entire length of the second cutting blade 53.
The outer end of the second upstream pressing member 87 is positioned on the inner side of the tip end portion of the second cutting blade 53.
The first upstream pressing member 85 is thicker than the second upstream pressing member 87 by about the thickness of the second cutting blade 53.

The protruding portion 89 is configured to hold the web 19 in cooperation with the first upstream pressing member 85 after the end of cutting.
The first upstream presser member 85 and the second upstream presser member 87 are formed of an elastic material, for example, sponge, rubber or the like, and maintain the holding force of the web 19 by engaging and elastically deforming both. is there.
The material is selected depending on the amount of elastic deformation required, but rubber is preferable from the viewpoint of holding force.

  The conveyor belt device 37 is composed of a pair of endless belts, and sandwiches the sheet 45 cut by the cutter 35 and conveys it to the folding cylinder 39. Each of the endless belts is composed of a plurality of belts separated in the width direction and arranged substantially in parallel.

The folding drum 39 and the gripping drum 41 are used for folding the sheet 45 in a direction perpendicular to the vertical direction.
On the peripheral surface of the folding cylinder 39, two sets of claw members and two sets of folding blades are provided at intervals of approximately 180 degrees.
Two sets of gripping members are provided on the peripheral surface of the gripping cylinder 41 at an interval of approximately 180 degrees. This gripping member is set so as to be located at a position corresponding to the folding blade of the folding cylinder 39.
The folding cylinder 39 grips and conveys the leading end portion of the sheet 45 conveyed by the conveying belt 37 by the claw member. At this time, the folding blade is in a positional relationship in which the folding blade comes into contact with a substantially central position in the vertical direction of the seat 45.

  The conveying belt 43 is positioned below the gripping cylinder 41, and receives the folded sheet 45 from the gripping cylinder 41 and conveys it to the paper discharge unit 17. The conveyor belt 43 is composed of a plurality of belts that are separated in the width direction and arranged substantially in parallel.

The paper discharge unit 17 includes a chopper folding device 91, a right-angle folding impeller 93, a parallel folding impeller 95, and a paper discharge conveyor 97.
The chopper folding device 91 is provided at an intermediate position in the moving direction of the conveying belt 43, folds the sheet 45 in two along a folding line along the web conveying direction (vertical direction) 20, and supplies the folded sheet to the right-angle folding impeller 93. is there.

The parallel folding impeller 95 is installed below the downstream end of the conveyor belt 43 so that the axis is perpendicular to the top-to-bottom direction 20.
The parallel folding impeller 95 delivers the folded book conveyed by the conveyor belt 43 without being chopper folded (right angle folded) by the chopper folding device 91 to the paper discharge conveyor 97.
The discharge conveyor 97 is installed below the right-angle folding impeller 93 and the parallel folding impeller 95 so as to extend in a direction connecting the two.

The operation of the rotary printing press 1 according to the present embodiment described above will be described.
The web 19 fed out from the paper feeding device 3 is adjusted in tension by the infeed device 5 and supplied to the printing unit 7.
In the printing unit 7, the image formed on the printing plate attached to the peripheral surface of the plate cylinder 25 by supplying the dampening water and the ink in each printing unit 23 is transferred to the blanket cylinder 27. This is transferred and printed on both sides of the web 19 passing between the blanket cylinders 27, 27.

The web 19 passes through the four printing units 23 so that cyan, yellow, magenta and smear are printed and color printing is performed.
The web 19 printed by the printing unit 7 is heated by the drying device 9 to dry the ink.
Next, the web 19 passes so as to be in contact with the peripheral surface of each cooling drum 29 of the cooling device 11, is cooled by each cooling drum 29, is adjusted in tension by the web path unit 13, and is supplied to the folding machine 15.

  The web 19 that has entered the folding machine 15 is vertically folded or vertically cut by the triangular plate 31 and introduced into the nip roller 33. The web 19 is given a tension by the nip roller 33 and is conveyed toward the cutting machine 35.

Next, the cutting operation by the cutting machine 35 will be described with reference to FIGS.
4 to 9 show a time-series change of the cutting state in the cutting machine 35, where (a) shows the first cutting blade 51, the second cutting blade 53, the first downstream presser member 79, and the second at one end. Changes in the relative positions of the downstream pressing member 81, the first upstream pressing member 85, and the second upstream pressing member 87, (b) shows the cutting and web holding status at the same point.
A chain line CC in (a) is a line connecting the axis center of the first cylinder 47 and the axis center of the second cylinder 49.
A broken line S in (b) indicates a cutting position of the web 19.

When the first cylinder 47 and the second cylinder 49 rotate and reach the position shown in FIG. 3, the first downstream pressing member 79 and the protruding portion 83 of the second downstream pressing member 81 start to come into contact with each other.
If the 1st cylinder 47 and the 2nd cylinder 49 rotate from this to the position of FIG. 4, the 1st cutting blade 51 and the 2nd cutting blade 53 will start engagement at one end part, and will start a cutting | disconnection.
At this time, the contact between the first downstream pressing member 79 and the protruding portion 83 of the second downstream pressing member 81 on one end side is deepened and compressed to mutually hold the web 19. At the same time, the contact portion PK between the first downstream pressing member 79 and the protruding portion 83 of the second downstream pressing member 81 increases toward the other end.

If the 1st cylinder 47 and the 2nd cylinder 49 rotate from this to the position of FIG. 5, the protrusion part 89 of the 1st upstream pressing member 85 and the 2nd upstream pressing member 87 will start engagement in one end part.
At this time, the contact between the first downstream pressing member 79 at one end and the protruding portion 83 of the second downstream pressing member 81 is further deepened and compressed to hold the web 19 more strongly.
At the same time, the contact portion PK between the first downstream pressing member 79 and the protruding portion 83 of the second downstream pressing member 81 increases toward the other end.
Further, the cutting start point SK also moves toward the other end, and the cutting part SC becomes longer.

When the first cylinder 47 and the second cylinder 49 rotate from here to the position shown in FIG. 6, the contact between the protruding portion 89 of the first upstream presser member 85 and the second upstream presser member 87 is deepened at one end. The web 19 is compressed and strongly held. Further, the contact portion PJ between the protruding portion 89 of the first upstream pressing member 85 and the second upstream pressing member 87 increases toward the other end portion.
At this time, the contact between the first downstream pressing member 79 on one end side and the protrusion 83 of the second downstream pressing member 81 becomes shallow, and the force for holding the web 19 becomes weak.
At the same time, the contact portion PK between the first downstream pressing member 79 and the protruding portion 83 of the second downstream pressing member 81 increases toward the other end.
Further, the cutting start point SK also moves toward the other end, and the cutting part SC becomes longer.

When the first cylinder 47 and the second cylinder 49 are rotated from this position to the position shown in FIG. 7, the first downstream pressing member 79 and the protruding portion 83 of the second downstream pressing member 81 begin to separate at one end, and the contact portion PK. Is the maximum length l1.
At this time, the contact between the projecting portion 89 of the first upstream presser member 85 and the second upstream presser member 87 at one end is deepened and compressed, and the web 19 is strongly held.
At the same time, the contact portion PJ between the protruding portion 89 of the first upstream pressing member 85 and the second upstream pressing member 87 increases toward the other end.
Further, the cutting start SK point also moves toward the other end, and the cutting part SC becomes longer.

When the first cylinder 47 and the second cylinder 49 are rotated from this position to the position shown in FIG. 8, the projecting portion 89 of the first upstream pressing member 85 and the second upstream pressing member 87 begin to separate at one end, and the contact portion PJ. Is the maximum length l2.
Further, the cutting start point SK also moves toward the other end, and the cutting part SC becomes longer.
When the first cylinder 47 and the second cylinder 49 are rotated from this position to the position shown in FIG. 9, the projecting portion 89 of the first upstream presser member 85 and the second upstream presser member 87 are completely separated at one end side.
The contact portion PK is also shortened, and the web 19 is cut over the entire width.

In this way, the web 19 is strongly held by the first downstream pressing member 79 and the protruding portion 83 of the second downstream pressing member 81 prior to cutting by the first cutting blade 51 and the second cutting blade 53. The web 19 of the cutting part is given tension by the part and the nipping roller 33.
Moreover, since the first downstream pressing member 79 and the second downstream pressing member 81 are attached to the first cutting blade 51 and the second cutting blade 53, the protruding portions of the first downstream pressing member 79 and the second downstream pressing member 81 are provided. The contact portion PK with 83 moves in accordance with the movement of the cutting start point SK by the first cutting blade 51 and the second cutting blade 53, and can reliably hold the web 19 at the start of cutting.

Therefore, since the web 19 does not tilt or flutter even when pressed by the first cutting blade 51 and the second cutting blade 53, it can be easily and accurately cut.
Moreover, since the 1st cutting blade 51 and the 2nd cutting blade 53 are straight blades, it can cut | disconnect linearly neatly.
Thus, since the web 19 can be cut easily and accurately, and can be cut cleanly in a straight line, a clean and high-quality printed matter can be obtained.

Moreover, since the protrusion part 89 of the 1st upstream pressing member 85 and the 2nd upstream pressing member 87 hold | maintain so that the substantially front-end | tip of the cut | disconnected web 19 may be followed, the front-end | tip part of the cut | disconnected web 19 flutters. Can be prevented.
This also prevents the cutting line from progressing in an unexpected direction regardless of the cutting by the first cutting blade 51 and the second cutting blade 53.
In the present embodiment, the protruding portion 89 of the first upstream presser member 85 and the second upstream presser member 87 are configured to hold the substantially leading end of the cut web 19 after being cut. For example, the protruding amount of the protruding portion 89 of the first upstream pressing member 85 and the protruding amount of the second upstream pressing member 87 may be increased so that the web 19 is held closer to the time of cutting or at the time of cutting.

In this way, the cut sheet 45 is transported by the transport belt 37 and sent to the folding cylinder 39.
The front end of the sheet 45 is held by the claw member of the folding cylinder 39 and is conveyed by the rotation of the folding cylinder 39.
The claw member of the folding cylinder 45 holding the sheet 45 rotates beyond the contact point with the gripping cylinder 41, and when the folding position approaches the gripping cylinder 41, the folding blade protrudes to grasp the folding position of the sheet 45. Push it toward the gripping member of the barrel 41.
When the gripping member of the gripping cylinder 41 grips the folding position, the claw member opens the leading end of the sheet 45.

The sheet 45 that has been replaced by the gripping cylinder 41 is transferred to the transport belt 43 and transported to the paper discharge unit 17.
In the paper discharge unit 17, the sheet 45 is folded in half by the chopper folding device 91 and is discharged from the right-angle folding impeller 93 to the paper discharge conveyor 97.
Alternatively, the paper is discharged from the parallel folding impeller 95 to the paper discharge conveyor 97.

  In the present embodiment, the cutting machine 35 is used for the folding machine 15 of the rotary printing press 1, but the invention is not limited to this, and the cutting machine 35 may be used as a single unit. You may make it integrate in another apparatus.

1 is a front view schematically showing an overall schematic configuration of a rotary printing press according to an embodiment of the present invention. It is a perspective view which shows the cutting machine concerning one Embodiment of this invention. FIG. 3 is an XX view of FIG. 2. The operation of the cutting machine concerning one embodiment of the present invention is shown, (a) is a sectional view showing the relational position at a certain time, and (b) is a side view showing the cutting and web holding situation at the same point. The operation | movement of the cutting machine concerning one Embodiment of this invention is shown, (a) is sectional drawing of the related position in another certain time, (b) is a side view which shows the cutting | disconnection and web holding | maintenance situation at the same point. is there. The operation | movement of the cutting machine concerning one Embodiment of this invention is shown, (a) is sectional drawing of the related position in another certain time, (b) is a side view which shows the cutting | disconnection and web holding | maintenance situation at the same point. is there. The operation | movement of the cutting machine concerning one Embodiment of this invention is shown, (a) is sectional drawing of the related position in another certain time, (b) is a side view which shows the cutting | disconnection and web holding | maintenance situation at the same point. is there. The operation | movement of the cutting machine concerning one Embodiment of this invention is shown, (a) is sectional drawing of the related position in another certain time, (b) is a side view which shows the cutting | disconnection and web holding | maintenance situation at the same point. is there. The operation | movement of the cutting machine concerning one Embodiment of this invention is shown, (a) is sectional drawing of the related position in another certain time, (b) is a side view which shows the cutting | disconnection and web holding | maintenance situation at the same point. is there.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotary printing machine 15 Folding machine 19 Web 35 Cutting machine 47 1st cylinder 49 2nd cylinder 51 1st cutting blade 53 2nd cutting blade 79 1st downstream pressing member 81 2nd downstream pressing member 85 1st upstream pressing member 87 1st Two upstream presser members

Claims (5)

A pair of rotating shafts arranged across the traveling plate-like material and driven to rotate in opposite directions;
Each of the rotating shafts and at least a pair of cutting blades of straight blades provided so as to extend in the axial direction, and rotating the pair of rotating shafts allows the plate-like material to be rotated by the pair of cutting blades. A rotary cutting device for cutting,
In the vicinity of the cutting blade, there is provided a pressing member for holding the plate-like material when cutting with the cutting blade.   The rotary cutting device according to claim 1, wherein the pressing member is provided on the downstream side in the rotation direction of the cutting blade.   The rotary cutting device according to claim 2, wherein the pressing member is provided on the upstream side in the rotation direction of the cutting blade.   A folding machine using the rotary cutting device according to any one of claims 1 to 3 as a web cutting means. A rotary printing machine comprising the folding machine according to claim 4.

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