JP4185491B2 - Rotary press with paper break discharge means - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary press equipped with a paper discharge means, and in particular, in a rotary press that performs printing by continuously supplying printing paper from a paper feed unit to a rotary drum of a printing unit, the printing paper is cut off in the course of a travel path. The present invention relates to a rotary press with a sheet discharge means for forcibly discharging print paper from a printing unit so that the cut print paper does not wind around a rotating drum when paper is printed.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, newspaper printing presses have been developed and put into practical use for various purposes such as multicolor printing and high-speed printing.
In particular, in order to perform high-speed printing, not only the technology that prevents the printing paper from being cut off in the course of the travel path, but also if a paper break occurs, the cut printing paper is wrapped around the rotating drum of the printing unit. Therefore, there is a need for a technique for preventing problems such as breakage of the rotary press and a technique for easily removing the cut printing paper and restarting it in a short time.
[0003]
Next, a technique for coping with a paper break of a conventional rotary press will be described with reference to the drawings.
FIG. 6 is a schematic cross-sectional view for explaining the structure of the main part of the rotary press in the conventional example.
In the drawing, a rotary press 100 is a rotary press for newspaper printing, and a plurality of paper supply units 102 that continuously supply printing paper 111 and printing paper 111 supplied from these paper supply units 102 are used. And at least a printing unit 103 that performs printing. In the printing unit 103, a rotating cylinder (including a blanket cylinder 131 and a plate cylinder 132) performs printing on the printing paper 111 supplied from the paper supply unit 102.
[0004]
Each printing unit 103 is provided with a motor M for rotationally driving the blanket cylinder 131 and the plate cylinder 132.
These motors M are controlled by a common control unit (not shown), and rotate so that the phases of the blanket cylinders 131 of the printing units 103 always coincide.
The rotary press 100 is provided with a plurality of guide rollers 141, 142, and 143, and ensures a travel path for the printing paper 111.
These guide rollers 141, 142, and 143 use ball bearings or the like so that the peripheral speed can follow the traveling speed of the traveling printing paper 111, so that smooth rotation can be obtained.
[0005]
As a result, the guide rollers 141, 142, and 143 are rotated by the frictional force of the printing paper 111 that is pulled downstream by the blanket cylinder 131 and the folding machine.
The guide roller 142 is provided in the vicinity of the exit of the printing unit 103, and a wallet 151 is provided at a position facing the guide roller 142. When a paper break occurs on the printing paper 111, the wallis 151 is pressed against the printing paper 111 hung on the guide roller 142 by the air cylinder 152.
[0006]
The rotary press 100 is provided with a paper break sensor (not shown) that detects a paper break of the printing paper 111.
In addition, a paper cutter 105 is disposed between the printing unit 103 and the paper supply unit 102, and the paper cutter 105 cuts the printing paper 111 when a paper break sensor detects a paper break of the printing paper 111.
When the paper break sensor detects a paper break of the printing paper 111, the rotary press 100 configured as described above outputs a paper break signal to a control unit (not shown).
Then, the control unit that has input the paper break signal outputs a drive signal for pressing the wallet 151 to the air cylinder 152 and also outputs a rotary stop signal, a rotary drum stop signal, and a paper cut signal. Release the tension. Further, a braking force is applied to the web 112 of the paper supply unit 102, and the supply of the printing paper 111 is stopped.
[0007]
By the way, the rotary cylinder disposed in the printing unit 103 is in a state of being wetted by ink or water for printing, and therefore when the paper breaks, the printing paper 111 easily adheres to the rotary cylinder and rotates. The rotating cylinder that is in front of the printing unit 103 may wind up the printing paper 111 before and after the printing unit 103, thereby causing a winding called “body winding”.
When this drum winding phenomenon occurs, the printing paper 111 wound around the rotating drum winds around the rotating drum several times as it rotates, increasing its thickness, and eventually being firmly sandwiched in the gap between the rotating drum and the rotating drum. . For this reason, it is difficult not only to remove the printing paper 111 from the rotating cylinder, but also the rotating cylinder such as the plate cylinder 132 and the blanket cylinder 131 may be damaged or damaged.
[0008]
For example, when the No. 2 printing paper 111 is cut between the guide roller 143 and the folding machine, the No. 2 Wallis 151 is pressed against the printing paper 111 hung on the guide roller 142 and the No. 2 paper cutter 105 is printed. The paper 111 is cut.
The printing paper 111 cut by the paper cutter 105 is pulled by the blanket cylinder 131 that rotates by inertia, and is sent upward (downstream). The printing paper 111 that is sent upward is a guide roller 142 and wallis that rotate by inertia. 151 is further pulled and sent downstream.
As described above, the rotary press 100 can immediately stop the supply of the printing paper 111 even if the printing paper 111 is cut off on the travel path, thereby reducing the amount of lost paper, and generating the body winding phenomenon. Can be prevented.
[0009]
However, even if a rotary stop signal or a rotary drum stop signal is output, it takes a considerable amount of time until the rotary press 100 stops completely. In particular, in the printing unit 103 having a plurality of rotating cylinders such as the plate cylinder 132 and the blanket cylinder 131 which are heavy objects, it takes several tens of seconds to stop the rotating cylinders.
Therefore, when the printing speed of the rotary press is further increased, there is a high risk that the rotating drum will be damaged or damaged when a cylinder winding phenomenon occurs.
For this reason, in order to further increase the printing speed of the rotary press, there has been a problem that when the printing paper is cut, it is necessary to more reliably prevent the occurrence of the body winding phenomenon.
[0010]
In addition, a rotary press equipped with a tower type printing machine that performs multicolor printing has a structure in which unitized printing sections are stacked upward by the number of colors, while the printing paper travels in a substantially vertical direction. Printed.
For this reason, when the printing paper breaks, it is necessary to remove a lot of printing paper in the stacked printing section from the printing section, and to prevent the printing paper sent out from the printing section from dropping on the rotating drum. There wasn't.
[0011]
[Problems to be solved by the invention]
The present invention has been proposed in order to solve the above-described drawbacks of the prior art, and when the printing paper is cut in the course of the travel path, the cut printing paper is prevented from winding around the rotating drum. Another object of the present invention is to provide a rotary press with a paper discharge means for forcibly discharging printing paper from a printing section.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a paper feeding unit that continuously supplies printing paper, a printing unit that includes a rotary cylinder for printing the printing paper supplied from the paper feeding unit, and the printing A paper break discharge means for forcibly discharging the print paper from the printing unit so that the cut print paper does not wind around the rotating drum when the paper is cut in the course of the travel path, The discharge means is rotated by applying a driving force, and a discharge roller with a disk that rotates by inertia when the printing paper is cut off, and a timing pulley is arranged at the upstream end of the printing paper, and the downstream side A saddle member in which an idle timing pulley is disposed at the end, a rotation shaft is penetrated through the center, and a cylinder rod of an air cylinder is attached between the center and the upstream end, The printing paper breaks and the air When the cylinder rod of Linda protrudes, the press roller to which the timing pulley is attached, which is pressed against the printing paper hung on the discharge roller, and the unevenness of the inner peripheral surface are the idle pulley and the idle pulley of the press roller. A timing belt that meshes with the timing pulley and that has an uneven outer peripheral surface that meshes with the timing pulley of the discharge roller attached to the discharge roller. The unevenness of the peripheral surface meshes with the timing pulley of the press roller and the idle timing pulley, and the unevenness of the outer peripheral surface meshes with the timing pulley of the discharge roller, and the driving force from the discharge roller is transmitted through the timing belt. Apply to the presser roller. It is constituted to rotate at the same peripheral speed as the outlet roller.
[0013]
In this way, even if the printing paper is cut, the discharge roller can be rotated for a long time using the moment of inertia of the discharge roller. Therefore, even when a long printing paper has to be discharged, such as a rotary press equipped with a tower type printing machine that performs multicolor printing, the printing paper upstream of the paper break discharge means is pulled downstream. Thus, the printing paper can be reliably removed from the upstream side of the paper break discharge means.
[0014]
In addition, since the disk that rotates due to inertia is attached to the discharge roller, the discharge roller that is rotated by the frictional force of the printing paper can be stored in the disk even if the printing paper breaks and no frictional force is supplied. It can rotate with a moment of inertia and feed out printing paper.
Even if the moment of inertia of the discharge roller is large, the discharge roller can be rotated at the same peripheral speed as the traveling speed of the printing paper traveling at a high speed.
[0015]
Further, according to the present invention, the presser roller rotates at the same peripheral speed as the peripheral speed of the discharge roller because it engages with the timing pulley regardless of whether the cylinder rod protrudes or retracts. Therefore, when the press roller is pressed against the printing paper hung on the discharge roller, the printing paper can be smoothly sent out.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.
FIG. 1 shows a schematic structure of a rotary press to which a first reference embodiment of the present invention is applied. The rotary press 1 according to this embodiment is provided with a discharge roller 63 in which a disk 62 is attached to a roller 61. The discharge roller 63 is configured to rotate for a long time due to the moment of inertia stored in the disk 62 even when the printing paper 11 is cut downstream, and to discharge the printing paper 11 in the printing unit 3 from the printing unit 3. is there.
[0017]
Specifically, the rotary press 1 is a paper discharge unit including a discharge roller 63 and a wallis 51 pressed by the air cylinder 52 against the print paper 11 hung on the discharge roller 63 when the print paper 11 is cut. Means 6 is provided near the exit of the printing unit 3.
As shown in FIG. 2, the discharge roller 63 includes a roller 61 including a cylindrical portion 611 on which the printing paper 11 is hung and a shaft portion 612 protruding from both ends of the cylindrical portion 611, and a disk 62 attached to the shaft portion 612. It is made up of.
The disc 62 is usually a metal disc having an outer diameter larger than the diameter of the cylindrical portion 611, and the shaft portion 612 is attached to a through-hole drilled in the center portion by a key or a set bolt.
Instead of providing the disk 62, the outer diameter of the cylindrical portion 611 may be increased, or the thickness of the cylindrical portion 611 may be increased.
[0018]
Next, the operation of the rotary press 1 having the above configuration will be described.
The rotary press 1 generally starts printing at a low speed and gradually increases the printing speed. At this time, the discharge roller 6 rotates the discharge roller 6 at the same peripheral speed as the traveling speed of the printing paper 11 by the frictional force of the printing paper 11 applied to the cylindrical portion 611.
Although not shown, when the paper break sensor detects a paper break of the printing paper 11, a paper break signal is output to the control unit. Then, the control unit that has input the paper break signal outputs a drive signal for pressing the wallis 51 against the printing paper 11 hung on the discharge roller 63 to the air cylinder 52, as well as a rotary stop signal, a rotary drum stop signal, and a paper. Outputs a cut signal. Further, a braking force is applied to the web 12 of the paper feeding unit 2.
At this time, the rotating cylinder such as the blanket cylinder 31 continues to rotate for a while due to the moment of inertia even when the driving force is not supplied by the rotating cylinder stop signal, and sends the printing paper 11 downstream (in the present embodiment, upward). .
[0019]
Further, the paper break discharge means 6 presses the printing paper 11 that cannot be moved downstream by the wallet 51 against the discharge roller 63 that rotates with the moment of inertia, thereby printing at the same speed as the peripheral speed of the discharge roller 63. The paper 11 is sent out downstream.
At this time, since the disc 62 stores a large moment of inertia, the discharge roller 63 can continue to rotate for a while, and the printing paper 11 inside the printing unit 3 can be discharged downstream.
In addition, about the other structure of the rotary press of a present Example, it is the same as that of the rotary press of a prior art example.
[0020]
As described above, the rotary press 1 according to this embodiment winds the printing paper 11 in the printing unit 3 by rotating the discharge roller 63 using the moment of inertia of the disk 62 after the printing paper 11 is cut. It can be surely eliminated so that the phenomenon does not occur.
Therefore, the rotary press 1 is a case where the printing speed is increased, or even when a tower-type printing machine that performs multicolor printing by stacking the printing units 3 upward is used, the body winding by the rotary drum of the printing unit 3 is performed. The occurrence of the phenomenon can be reliably prevented.
Further, preferably, after the printing paper 11 is cut, the discharge roller 63 is rotated at the same peripheral speed as the traveling speed of the printing paper 11 fed from the printing unit 3.
[0021]
In this way, when the printing paper 11 is cut, the cutting paper discharge means 6 can pull the printing paper 11 sent out from the printing unit 3 without pulling too much or loosening too much. It is possible to prevent secondary sheet breakage between the means 6 and the printing unit 3, and to further reduce the risk of the printing paper 11 being wound around the rotary drum of the printing unit 3.
In this embodiment, the wallis 51 is used. However, instead of the wallis 51, a pressing roller may be used, or the pressing roller may be used together with the wallis 51. Obtainable.
Furthermore, it is good also as a structure which covers the contact surface of Wallis 51 or a press roller with rubber | gum etc., By this, the frictional force with the printing paper 11 can be increased.
[0022]
FIG. 3 is a schematic front view for explaining the structure of the discharge roller of the rotary press according to the second embodiment of the present invention.
As shown in the figure, the rotary press of the present embodiment is provided with a motor 7 directly connected to the drive side shaft portion 613 of the discharge roller 63a in place of the disk 62 in the first embodiment described above. When the printing paper 11 is cut inside and on the downstream side of the discharge roller 63 a, the motor 7 rotates the discharge roller 63 a at the same peripheral speed as the peripheral speed of the blanket cylinder 31, and the printing paper 11 in the printing unit 3. Is discharged from the printing unit 3.
[0023]
Specifically, the rotary press of the present embodiment is configured such that the discharge roller 63a, the motor 7 directly connected to the discharge roller 63a, and the printing paper 11 hung on the discharge roller 63a when the printing paper 11 breaks. A paper break discharge means 6 a composed of Wallis 51 pressed by the air cylinder 52 is provided near the exit of the printing unit 3.
The discharge roller 63a includes a cylindrical portion 611 on which the printing paper 11 is hung, a shaft portion 612 protruding from the non-driving side end portion of the cylindrical portion 611, and a driving side shaft portion 613 protruding from the driving side end portion of the cylindrical portion 611. It is made up of.
The drive-side shaft portion 613 is supported by a ball bearing at a substantially central portion of the shaft.
The ball bearing is embedded in a flange 71 that is detachably attached to the housing with a bolt (not shown) or the like.
[0024]
Further, the drive-side shaft portion 613 has a shaft protruding from the flange 71, and a coupling 72 is attached to the tip, and is directly connected to the rotor of the motor 7 via the coupling 72. .
The motor 7 is a motor capable of controlling the rotation speed, and is controlled so as to rotate the discharge roller 63 a at the same peripheral speed as the peripheral speed of the blanket cylinder 31. As a result, even if the rotary press suddenly increases or decreases the printing speed, the printed printing paper 11 and the discharge roller 63a do not slip, so that the printing paper 11 can run smoothly.
[0025]
Further, in the rotary press of the present embodiment, even if the wallis 51 is pressed against the printing paper 11 when the printing paper 11 is cut, the rotation of the discharge roller 63a is not reduced and the circumference of the blanket cylinder 31 is reduced. The discharge roller 63a can be rotated at the same peripheral speed as the speed. Therefore, it is possible to prevent the printing paper 11 between the blanket cylinder 31 and the discharge roller 63a from being strongly pulled or loosened too much.
[0026]
In addition, about the other structure of the rotary press of a present Example, it is the same as that of the rotary press of a 1st Example.
As described above, when the rotary roller of the present embodiment rotates the discharge roller 63 a at the same peripheral speed as the peripheral speed of the blanket cylinder 31 using the motor 7 whose rotational speed is controlled, the printed printing paper 11 and the discharged paper 11 are discharged. Since slippage with the roller 63a can be prevented, the printing speed can be rapidly increased or decreased.
Furthermore, even when the printing paper 11 is cut, the printing paper 11 in the printing unit 3 can be reliably removed by rotating the discharge roller 63a at the same peripheral speed as the peripheral speed of the blanket cylinder 31. it can.
[0027]
In the present embodiment, even if the printing paper 11 is cut and no driving force is supplied to the blanket cylinder 31, the motor 7 rotates the discharge roller 63 a at the same peripheral speed as the blanket cylinder 31. However, the present invention is not limited to this configuration. For example, when the driving force to the blanket cylinder 31 is turned off, the power of the motor 7 is turned off, and the inertia of the rotor of the motor 7 and the coupling 72 is used for discharging. The roller 63a may be rotated.
By doing so, the effect similar to that of the rotary press of the first embodiment can be obtained by utilizing the moment of inertia of the rotor of the motor 7 without performing the speed control of the motor 7 after the occurrence of the paper break. be able to.
[0028]
Further, in the above rotary press, even if the inertia moment of the rotor of the motor 7 or the coupling 72 is used, if the inertia moment is insufficient, a structure may be used in which a disk is attached to the drive side shaft portion 613. By doing so, the same effect as the above-mentioned rotary press can be obtained.
[0029]
Furthermore, in this embodiment, the discharge roller 63a is directly connected to the motor 7. However, the present invention is not limited to this structure. For example, as shown in FIG. 4, timing pulleys 73 and 74 and a timing belt are used. The discharge roller 63a and the motor 7 may be connected via 75, and even in this case, substantially the same effect as in this embodiment can be obtained.
[0030]
FIG. 5 is a schematic cross-sectional view for explaining the structure of the paper break discharge means of the rotary press according to the embodiment of the present invention.
As shown in the figure, the rotary press of the present embodiment uses a presser roller 51b instead of the wallis 51 in the above-described second reference example, and the presser roller 51b is rotated by being supplied with a driving force. The driving force is obtained from the roller 63b via the timing belt 84, and the roller 63b rotates at the same peripheral speed as that of the discharge roller 63b.
[0031]
Specifically, the rotary press of the present embodiment includes a discharge roller 63b to which a timing pulley 81 is attached, a press roller 51b pressed against the discharge roller 63b by an air cylinder 52b, a timing pulley 82, and an idle timing pulley 83. And a timing belt 84 that is hung on the timing pulleys 81 and 82 and the idle timing pulley 83.
Although not shown, the discharge roller 63 b is supplied with a driving force from a driving source such as a motor and rotates at the same peripheral speed as the peripheral speed of the blanket cylinder 31.
A timing pulley 81 is attached to the discharge roller 63b.
The timing pulley 82 and the idle timing pulley 83 are disposed at both ends of the flange member 54 so that the timing pulley 82 is located on the upstream side of the idle timing pulley 83.
[0032]
The timing belt 84 has irregularities formed on the inner and outer peripheral surfaces, the irregularities on the inner circumferential surface mesh with the irregularities on the timing pulley 82 and the idle timing pulley 83, and the irregularities on the outer circumferential surface are the irregularities on the timing pulley 81. The presser roller 51b can be rotated at the same peripheral speed as the peripheral speed of the discharge roller 63b.
The flange member 54 has a rotation shaft 53 passing through a central portion thereof, and a cylinder rod of an air cylinder 65 is attached between the central portion and an upstream end portion. When the cylinder rod protrudes, the presser roller 51b is rotated toward the discharge roller 63b. Conversely, when the cylinder rod is retracted, the presser roller 51b is rotated toward the anti-discharge roller 63b.
[0033]
Here, the timing belt 84 is engaged with the timing pulley 81 regardless of the position of the cylinder rod, that is, whether the cylinder rod protrudes or retracts, so that the presser roller 51b has a circumferential speed of the discharge roller 63b. Rotates at the same peripheral speed. Therefore, when the press roller 51b is pressed against the printing paper 11 hung on the discharge roller 63b, the printing paper 11 can be smoothly delivered.
In addition, about the other structure of the rotary press of this embodiment, it is the same as that of the rotary press of a 2nd reference example.
[0034]
Thus, the rotary press of this embodiment transmits the driving force of the discharge roller 63b to the presser roller 51b using the timing belt 84, and rotates the presser roller 51b at the same peripheral speed as the peripheral speed of the discharge roller 63b. Thus, even when the printing paper 11 is cut, the printing paper can be smoothly sent out without applying an abnormal load to the printing paper.
[0035]
Although the preferred embodiment of the rotary press with the paper discharge means according to the present invention has been described, the rotary press with the paper discharge means according to the present invention is not limited to the above-described embodiment, and the present invention. It goes without saying that various modifications can be made within the range described above.
For example, the rotary press with the paper discharge means is not limited to the case where the paper discharge means sends the printing paper downstream. For example, the printing paper may be wound around the discharge roller. Although it takes time and effort to remove the printing paper from the discharge roller, the printing paper can be forcibly discharged from the printing unit, so that the occurrence of a body winding phenomenon can be prevented.
[0036]
【The invention's effect】
As described above, according to the rotary press with a paper discharge unit according to the present invention, even when the print paper is cut, the print paper inside the print unit can be forcibly discharged from the print unit. As a result, it is possible to more reliably prevent the drum winding phenomenon of the rotating cylinder and to enable high-speed printing and multicolor printing.
Further, according to the rotary machine with the paper discharge means according to the present invention, the rotary machine suddenly increases or decreases the printing speed by rotating the discharge roller at the same peripheral speed as the peripheral speed of the blanket cylinder. Even so, the applied printing paper and the discharge roller do not slip, so that the printing paper can be smoothly run.
Industrial applicability [Brief description of drawings]
FIG. 1 is a sectional view for explaining a schematic structure of a rotary press to which a first reference embodiment of the present invention is applied.
FIG. 2 is a schematic front view for explaining the structure of the discharge roller of the rotary press according to the first reference embodiment.
FIG. 3 is a schematic front view for explaining the structure of the discharge roller of the rotary press according to the second reference embodiment.
FIG. 4 is a schematic front view for explaining the structure of the discharge roller of the rotary press according to the application example of the second reference embodiment.
FIG. 5 is a schematic cross-sectional view for explaining the structure of the paper break discharge means of the rotary press according to the embodiment of the present invention.
FIG. 6 is a schematic cross-sectional view for explaining the structure of the main part of the rotary press in the conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotary press 11 Printing paper 51b Pressing roller 53 Rotating shaft 54 ridge member 63b Discharge roller 81 Timing pulley 82 Timing pulley 83 Idle timing pulley 84 Timing belt

Claims (1)

A paper feeding unit for continuously supplying printing paper;
A printing unit having a rotating drum for printing the printing paper supplied from these paper feeding units;
When the printing paper is cut in the course of the travel path, the paper breaking discharge means for forcibly discharging the printing paper from the printing unit so that the cut printing paper does not wind around the rotating drum,
The paper break discharge means is
A discharge roller with a disk that rotates with driving force and rotates by inertia when the printing paper breaks;
A timing pulley is disposed at the upstream end of the printing paper, an idle timing pulley is disposed at the downstream end, a rotation shaft is passed through the center, and the center and the upstream end A flange member to which a cylinder rod of an air cylinder is attached,
A press roller to which the timing pulley is attached, which is pressed against the print paper hung on the discharge roller when the print paper is cut and a cylinder rod of the air cylinder protrudes;
A timing belt in which irregularities on the inner peripheral surface mesh with the timing pulley and idle timing pulley of the pressing roller, and irregularities on the outer peripheral surface mesh with the timing pulley of the discharge roller attached to the discharge roller;
Irregularities on the inner peripheral surface of the timing belt mesh with the timing pulley of the pressing roller and the idle timing pulley, and irregularities on the outer peripheral surface mesh with the timing pulley of the discharge roller, regardless of whether the cylinder rod protrudes or retracts. And applying a driving force from the discharge roller to the press roller via the timing belt, and rotating the press roller at the same peripheral speed as the discharge roller.
A rotary press with a paper break discharge means.

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