WO2016046918A1

WO2016046918A1 - Printer

Info

Publication number: WO2016046918A1
Application number: PCT/JP2014/075285
Authority: WO
Inventors: 西山　浩司; 伊藤　守
Original assignee: 三菱重工印刷紙工機械株式会社
Priority date: 2014-09-24
Filing date: 2014-09-24
Publication date: 2016-03-31

Abstract

Provided is a printer with a simple configuration that is able to limit reduction in productivity even in situations in which power outages occur. The printer is provided with: a paper-feeding device for supplying web from rolled paper; a printing device for printing on the web supplied from the paper-feeding device; a drying device for drying the web printed by the printing device; a cooling device for winding the web dried by the drying device onto a freely rotating cooling cylinder and cooling the web; a folding machine for folding the web cooled by the cooling device to form sections; a cutter that is disposed downstream of the cooling cylinder and is for cutting the web during a power outage; and a winding mechanism for winding the web, cut by the cutter, onto the cooling cylinder.

Description

Printer

The present invention relates to a printing press used as a rotary printing press for newspapers.

For example, an offset rotary printing press for newspaper includes a paper feeding device having a plurality of paper feeding units, a printing device having a plurality of printing units, a web pass device, a folding machine having a plurality of folding units, and a paper discharging device. And have. In such a printing machine, a web is supplied from a paper feeding device to each printing unit, printing is performed on each web by each printing unit, and a predetermined number of web travel routes are changed by a web pass device. After overlapping in order, the web is vertically folded by a folding machine, and then the paper is horizontally cut by a predetermined length, and then folded to form a fold and discharged as a printed matter (newspaper).

The printing press stops operation when power supply stops due to a power failure, etc., or when voltage drops and operation cannot be continued. As an operation method of the printing press when a power failure occurs, for example, in Patent Document 1, when a power failure occurs, the power source is switched to a power storage power source, and the blanket cylinder during printing operation is printed by the power from the power storage power source. A control method for a rotary press is described in which a traction mechanism for a printing material at a folded portion is separated from a material and stopped after deceleration within a predetermined time.

Also, some printing presses include a drying device that dries a web printed on the downstream side of the printing device, and a cooling device that cools the dried web (see Patent Document 2). Patent Document 2 describes that a tension detection device is disposed on a cooling roller, a decrease in tension that causes web breakage is detected by the tension detection device, and a release device or a web cutting device is operated based on the detection result. ing.

JP 2002-307663 A JP-A-4-275152

As described in Patent Document 1, an electric storage power supply is provided, and even when a power failure occurs, operation can be stopped while suppressing the web from winding around a roller or the like by supplying electric power. However, in order to secure the power necessary for the process of stopping the printing press in the event of a power failure, a large capacity storage power source is required. Further, since the operation of the entire apparatus is controlled in conjunction with each other, the control becomes complicated.

The present invention solves the above-described problems, and an object of the present invention is to provide a printing machine that has a simple configuration and can suppress a decrease in productivity even in an environment where a power failure occurs.

In order to achieve the above object, a printing machine according to the present invention includes a paper feeding device that supplies a web from a web, a printing device that performs printing on the web supplied from the paper feeding device, and a printing device that is printed by the printing device. A drying device that dries the web, a cooling device that winds and cools the web dried by the drying device around a rotatable cooling cylinder, and a folding machine that folds the web cooled by the cooling device to form a fold. The cutter is disposed downstream of the cooling cylinder and includes a cutter that cuts the web in the event of a power failure, and a winding mechanism that winds the web cut by the cutter around the cooling cylinder. is there.

The printing machine of the present invention can suppress the web from being clogged or cut at an unintended position by cutting the web downstream of the cooling cylinder and winding the web around the cooling cylinder when a power failure occurs. Moreover, the web on the upstream side of the cooling cylinder can be connected by winding it around the cooling cylinder, and the production can be resumed by passing the paper wrapped around the cooling cylinder downstream. , Productivity can be prevented from decreasing. Moreover, it can suppress that an apparatus score increases by using the existing cooling cylinder. Thereby, it is possible to suppress a decrease in productivity even in an environment where a power failure occurs with a simple configuration.

In the printing press of the present invention, the winding mechanism is disposed at a position not in contact with the web passing between the cutter and the cooling cylinder, and in the event of a power failure, it is closer to the cooling cylinder than the moving path of the web. It includes a movable paper winding roller that moves to a position.

In the printing machine of the present invention, the winding mechanism is disposed between the cooling cylinder and the guide roller that guides the web, and protrudes toward the cooling cylinder from a tangent line that contacts the cooling cylinder and the guide roller. It includes a fixed roller disposed at a position.

In the printing press of the present invention, the cooling device includes a plurality of the cooling cylinders, and the winding mechanism includes a specific cooling cylinder that winds the web, and a downstream cooling cylinder that is disposed on the downstream side of the specific cooling cylinder. And a fixed roller disposed at a position protruding toward the specific cooling cylinder from a tangent line contacting the specific cooling cylinder and the downstream cooling cylinder.

In the printing press according to the present invention, the winding mechanism includes an air blower that blows air in a direction of urging the web toward the cooling cylinder in the event of a power failure.

In the printing machine of the present invention, the winding mechanism includes a water application device that applies water to the surface of the cooling cylinder in the event of a power failure.

In the printing press of the present invention, the cooling cylinder rotates with inertia during a power failure.

In the printing press of the present invention, the paper feeding device has a paper feed brake driven by air pressure, a tension control unit that adjusts air pressure supplied to the paper feed brake, and setting of air pressure supplied to the paper feed brake The emergency tension control unit can be switched in multiple stages, and the air that has passed through the tension control unit is supplied to the paper feed brake, or the air that has passed through the emergency tension control unit is supplied to the paper feed brake A brake pressure control mechanism having a mode switching unit that switches between the emergency tension control unit and the mode switching unit from the state in which air that has passed through the tension control unit is supplied to the paper feed brake during a power failure. The control device is switched to a state in which the supplied air is supplied to the paper feed brake. Wherein the switching the setting of the air pressure on the basis of the roll diameter of the web of the sheet feeding device at the time of feeding.

The printing press of the present invention further includes a power failure detection device that detects a power failure, and when the power failure detection device detects a power failure, the cutter cuts the web, and the web cut by the cutter is wound around the winding mechanism. It is characterized by being wound around.

According to the printing machine of the present invention, it is possible to suppress a decrease in productivity even in an environment where a power failure occurs with a simple configuration.

FIG. 1 is a schematic view showing a newspaper offset rotary printing press as a printing press according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram illustrating a cooling device, a cutter, and a winding mechanism of a newspaper offset rotary printing press according to the present embodiment. FIG. 3 is a schematic diagram illustrating the configuration of each unit that operates during a power failure in the newspaper offset rotary printing press according to the present embodiment. FIG. 4 is a schematic diagram illustrating a brake pressure control mechanism and a peripheral portion. FIG. 5 is a graph showing the relationship between the roll diameter of the paper take-up roll of the brake pressure control mechanism and the brake pressure. FIG. 6 is a time chart showing the operation of each part during a power failure of the newspaper offset rotary printing press of this embodiment. FIG. 7 is a schematic configuration diagram illustrating a cooling device, a cutter, and a winding mechanism of a newspaper offset rotary printing press according to another embodiment. FIG. 8 is a time chart showing the operation of each part during a power failure of the newspaper offset rotary printing press shown in FIG. FIG. 9 is a schematic configuration diagram illustrating a cooling device, a cutter, and a winding mechanism of a newspaper offset rotary printing press according to the present embodiment. FIG. 10 is a schematic diagram showing a water application apparatus. FIG. 11 is a schematic diagram illustrating the configuration of each unit that operates during a power failure of the newspaper offset rotary printing press illustrated in FIG. 9. FIG. 12 is a schematic configuration diagram showing a cooling device, a cutter, and a winding mechanism of a newspaper offset rotary printing press according to another embodiment.

Hereinafter, preferred embodiments of a printing press according to the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example.

FIG. 1 is a schematic view showing a newspaper offset rotary printing press as a printing press according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram illustrating a cooling device, a cutter, and a winding mechanism of a newspaper offset rotary printing press according to the present embodiment.

As shown in FIG. 1, a newspaper offset rotary printing press (hereinafter also referred to as a printing press) 10 of this embodiment is a newspaper offset rotary printing press, which is a paper feeding device R, an infeed device I, It has a printing device U, a web pass device D, and a folding machine F. The paper feeding device R has a plurality of (in this embodiment, five) paper feeding units R1 to R5. The infeed apparatus I has a plurality (five in this embodiment) of infeed units I1 to I5, and the printing apparatus U has a plurality (five in this embodiment) of printing units U1 to U5. The web pass device D has a plurality (two in this embodiment) of web pass units D1 and D2. The folding machine F has a plurality (two in this embodiment) of folding units F1, F2. Further, the printing press 10 includes a drying device 19, a cooling device 20, a paper feed cutter 40, and a winding mechanism 41 corresponding to each of the printing units U 1, U 2, U 4, and U 5. That is, the printing press 10 includes four drying devices 19, a cooling device 20, a paper feed cutter 40, and a winding mechanism 41. Note that the number of units of the printing press 10 is not limited to this.

In FIG. 1, the two folding units F1 and F2 are shown side by side, but actually, the operation side folding unit F1 and the driving side folding unit F2 are arranged side by side in a direction perpendicular to the paper surface. ing. Furthermore, although the printing apparatus U has been described from two parts, it has been described by dividing it into two in terms of function, and in reality, it is a single apparatus.

The printing press 10 has a so-called shaftless structure in which a rotation mechanism (drive cylinder / roller) such as an infeed device I, a printing device U, a cooling device 20, a web pass device D, and a folding machine F rotates independently.

Here, the above-described paper feeding device R, infeed device I, printing device U, drying device 19, cooling device 20, paper feeding cutter 40, winding mechanism 41, web pass device D, and folding machine F will be described in detail. .

In the paper feeding device R, the paper feeding units R1 to R5 have substantially the same configuration. Each of the paper feeding units R1 to R5 has a holding arm 11 that holds three webs on which the web W is wound in a roll shape. By rotating the holding arm 11, the webs are rotated to a paper feeding position. be able to. Each of the paper feeding units R1 to R5 has a paper splicing device (not shown), and when the web fed out at the paper feeding position decreases, the paper splicing device waits for the web at the paper feeding position. The web can be spliced.

In the infeed device I, the infeed units I1 to I5 have substantially the same configuration. The in-feed units I1 to I5 stably maintain the tension of the web W traveling through the printing apparatus U at an appropriate value by adjusting the tension of the web W fed to the printing units U1 to U5 of the printing apparatus U. The infeed units I1 to I5 have a cutter 34 that cuts the web when stopped, and a paper cutting detector 36 that detects whether the web is cut. By cutting the web, the cutter 34 can suppress excessive paper from being supplied to the printing units U1 to U5 and causing paper jams. By determining whether or not the web is cut by the paper cutting detector 36, the web can be surely cut.

Note that the tension adjustment of the web W from the paper feeding device R to the infeed device I is performed by a paper feeding brake 32 provided in the paper feeding units R1 to R5, and a tension detection roller provided in the paper feeding device R. The paper feed brake 32 is controlled based on the detection result. As shown in FIG. 1, a drag roller 16 that can be driven and rotated by a drive source is provided on the downstream side of the printing apparatus U.

In the printing apparatus U, the printing units U1, U2, U4, and U5 are multicolor printing units that can perform double-sided four-color printing, and the printing unit U3 is a single-color printing unit that can perform single-color printing. . Each printing unit U1, U2, U3, U4, U5 has an ink supply device (not shown), a plate cylinder 17, and a blanket cylinder 18 corresponding to the color to be printed. In this case, in each of the printing units U1 to U5, the circumferential length (diameter) of the plate cylinder 17 and the circumferential length (diameter) of the blanket cylinder 18 are set to the same diameter. That is, on the peripheral surface of the plate cylinder 17, one printing plate (not shown) is provided along the circumferential direction (vertical length direction of the web W), and four printing plates are provided along the axial direction (width direction of the web W). The plate is removable.

In this embodiment, the printing units U1, U2, U4, and U5 are multicolor printing units and U3 is a single color printing unit. However, the present invention is not limited to this configuration. For example, various units such as a double-sided two-color printing unit, a double-sided single-color printing unit, a single-sided four-color printing unit or a single-color printing unit may be used in combination as appropriate according to the printed matter.

The drying device 19 dries the ink on the web W on which printing has been performed by any of the printing devices U1, U2, U4, and U5. The drying device 19 blows warm air on the upper and lower surfaces of the printed web W to dry the ink.

As shown in FIG. 2, the cooling device 20 cools the web W storing excess heat after drying in the drying device 19 to an appropriate temperature, and wraps the web W to cool the web W (this embodiment). Then, four cooling

cylinders

25, 26, 27, 28 and a guide roller 29 are provided. Each cooling

cylinder

25, 26, 27, 28 is provided with

circulation portions

25 a, 26 a, 27 a, 28 a for circulating a cooling medium therein, and supplies a cooling medium at a predetermined temperature from a cooling medium supply source (not shown). Circulation is possible. In the cooling device 20, the web W passes through the cooling

cylinders

25, 26, 27, and 28 in this order, and then passes through the guide roller 29. The web that has passed through the cooling cylinder 27 is wound around a cooling cylinder 28 that is disposed vertically below the cooling cylinder 27. The web that has passed through the cooling cylinder 28 is wound around a guide roller 29 disposed on the upper side in the vertical direction than the cooling cylinder 28 and moves downstream after the movement direction has changed.

The paper cutting cutter 40 is disposed at a position facing the web W between the cooling cylinder 28 and the guide roller 29 in the conveyance path of the web W. The paper cutting cutter 40 moves in the direction of the arrow 45 and can cut the web W between the cooling cylinder 28 and the guide roller 29. The operation of the paper cutting cutter 40 will be described later.

The winding mechanism 41 is a device that assists when the web W is cut by the paper cutting cutter 40, so that the portion upstream of the cut position of the cut web W winds around the cooling cylinder 28. The winding mechanism 41 includes an air blower 42 and a paper winding roller 44.

The air blower 42 is arranged at a position facing the web W between the cooling cylinder 28 and the paper cutting cutter 40 in the conveyance path of the web W. The air blower 42 faces the surface of the web W wound around the cooling cylinder 28 that does not contact the cooling cylinder 28. When the air blower 42 is operated, it blows air toward the web W. The air blower 42 preferably blows air uniformly in the width direction of the web W. The air blower 42 may arrange a plurality of nozzles in the width direction of the web W, or may blow air with a nozzle having a shape spreading in the width direction of the web W. When air is blown from the air blower 42, the web W is applied with a force in the direction of winding around the cooling cylinder 28.

The paper winding roller 44 is disposed at a position facing the web W between the cooling cylinder 28 and the air blower 42 in the conveyance path of the web W. The paper winding roller 44 faces the surface of the web W wound around the cooling cylinder 28 that is not in contact with the cooling cylinder 28 (the surface opposite to the surface in contact with the web W). The paper winding roller 44 is a roller whose position can be moved, and includes a roller 44a and a drive unit 44b for moving the roller 44a. The paper winding roller 44 is a swing roller in which the roller 44a rotates in the direction of an arrow 46 with the fulcrum of the drive unit 44b as a base point. The roller 44a is not particularly limited, and may be a Wallis type roller or a full-surface rubber roller. The paper winding roller 44 is disposed at a position (a position indicated by a solid line in FIG. 2) that does not come into contact with the web W when the printing operation is performed. When the roller 44a is moved by the drive unit 44b, the paper winding roller 44 moves to a position closer to the cooling cylinder 28 than the conveyance path of the web W (a position indicated by a dotted line in FIG. 2). That is, the paper winding roller 44 moves the conveyance path of the web W in a direction in which the roller 44a is wound around the cooling cylinder 28 more than the conveyance path of the web W when the printing operation is performed. The operation of the winding mechanism 41 will be described later.

The web pass device D has a web pass unit D1 and a web pass unit D2. The web pass unit D1 is provided for the printing units U1 to U3. The web pass unit D2 is provided for the printing units U4 and U5. Each of the web path units D1 and D2 has substantially the same configuration, and is a slitter that cuts the web W along the longitudinal direction (the longitudinal direction of the web W, the conveyance direction of the web W) at the center in the width direction, and the longitudinal cut. A turn bar for setting the transport path of the web W, and a compensator for adjusting the transport position of the web W in the vertical direction.

Accordingly, the webs W printed by the printing units U1 to U3 are longitudinally cut by the slitter in the web pass unit D1, the conveyance path is changed by the turn bar, and the conveyance position is adjusted by the compensator. Are overlaid in order. Each web W printed by the printing units U4 and U5 is vertically cut by the slitter in the web pass unit D2, the conveyance path is changed by the turn bar, and the conveyance position is adjusted by the compensator. They are stacked in order.

In the folding machine F, the two folding units F1, F2 are arranged on the operation side and the drive side. Accordingly, when a plurality of webs W1 are introduced by being overlapped from the web pass unit D1, the folding unit F1 has a triangular plate or the like, vertically folds the web W, horizontally cuts to a predetermined length, and horizontally folds. A fold can be formed and discharged as a newspaper. When a plurality of webs W2 are introduced from the web pass unit D2, the folding unit F2 has a triangular plate or the like, vertically folds the web W, horizontally cuts to a predetermined length, and horizontally folds. A fold can be formed and discharged as a newspaper. In this case, in the folding machine F, the folding units F1 and F2 not only process the webs W1 and W2 from the web path units D1 and D2, but also one of the folding units F1 and F2 can process them together. .

The folding machine F includes a triangular plate cutter 50 and a triangular plate air blower 52. The triangular plate cutter 50 and the triangular plate air blower 52 are arranged on the downstream side of the triangular plate of the folding units F1 and F2 in the conveyance path of the web W and upstream of the position where the sheet is cut horizontally by a predetermined length. The triangular plate cutter 50 cuts the web W that has passed through the triangular plate. The triangular plate air blower 52 blows air to the web W that has passed through the triangular plate, and moves it to a route other than a route that is horizontally cut by a predetermined length. The triangular plate cutter 50 and the triangular plate air blower 52 are operated when an abnormality occurs on the downstream side of the conveyance path of the web W from the installed position, or when the apparatus stops, cutting the web W, It is assumed that the web W is not supplied to the path that is cut horizontally by length.

As shown in FIGS. 1 and 2, the webs W respectively supplied from the paper feeding units R1 to R5 of the paper feeding device R are fed from the infeed device I by the newspaper offset rotary printing press of this embodiment. The tension is adjusted by the infeed units I1 to I5 and supplied to the printing units U1 to U5 of the printing apparatus U.

Thereafter, color printing is performed on both sides of each web W by the printing units U1 to U5 in the printing apparatus U. Each of the webs W printed by the printing units U1 to U3 is vertically cut by a slitter in the web pass unit D1, changed by a turn bar, changed by a turn bar, and adjusted by a compensator. Are overlaid in order. Each web W printed by the printing units U4 and U5 is vertically cut by the slitter in the web pass unit D2, the conveyance path is changed by the turn bar, and the conveyance position is adjusted by the compensator. They are stacked in order.

After that, in the folding machine F, when a plurality of webs W1 are overlapped and introduced from the web pass unit D1, the folding unit F1 vertically folds the web W, cuts it horizontally at a predetermined length, and folds it horizontally. Form a compromise and eject it as a newspaper. In addition, when a plurality of webs W2 are overlapped and introduced from the web pass unit D2, the folding unit F2 vertically folds the web W, horizontally cuts it at a predetermined length, and then horizontally folds to form a fold. The paper is discharged as a newspaper.

Next, the operation of the printing press 10 during a power failure will be described with reference to FIGS. 3 to 6 in addition to FIGS. FIG. 3 is a schematic diagram illustrating the configuration of each unit that operates during a power failure in the newspaper offset rotary printing press according to the present embodiment. FIG. 4 is a schematic diagram illustrating a brake pressure control mechanism and a peripheral portion. FIG. 5 is a graph showing the relationship between the roll diameter of the paper take-up roll of the brake pressure control mechanism and the brake pressure. FIG. 6 is a time chart showing the operation of each part during a power failure of the newspaper offset rotary printing press of this embodiment.

3 will be used to explain each part related to the operation of the printing press 10 during a power failure. In addition to the cooling cylinder 28, the paper feed brake 32, the paper cutting cutter 40, the air blower 42, the paper winding roller 44, the triangular plate cutter 50, and the triangular plate air blower 52, the printing machine 10 includes a power supply. 72, a compressor 74, an air tank 76, a control device 78, a power failure detection device 79, a brake pressure control mechanism 80, and open /

close solenoid valves

82, 84, 86, 88, 90. The description of the cooling cylinder 28, the paper feed brake 32, the paper cutting cutter 40, the air blower 42, the paper winding roller 44, the triangular plate cutter 50, and the triangular plate air blower 52 of the cooling device 20 is omitted.

The power source 72 is a device that supplies power supplied from a transmission line or a generator to each unit. The power source 72 supplies power to the cooling cylinder 28, the compressor 74, the control device 78, the brake pressure control mechanism 80, the open / close

electromagnetic valves

82, 84, 86, 88, 90, and the like. The compressor 74 compresses air and sends out compressed air. The compressor 74 sends the generated compressed air to the paper cutting cutter 40, the air blower 42, the paper winding roller 44, the triangular plate cutter 50, the triangular plate air blower 52, and the brake pressure control mechanism 80. The compressor 74 may send the generated compressed air directly to each part, send it via the air tank 76, or send it to a device that stores another compressed air.

Open /

close solenoid valves

82, 84, 86, 88, and 90 are provided in pipes connecting the air tank 76, the paper cutting cutter 40, the air blower 42, the paper winding roller 44, the triangular plate cutter 50, and the triangular plate air blower 52. In the present embodiment, description will be given on the assumption that each part is connected to the air tank 76. However, the air tank 76 may be connected to only a part of equipment or may be divided into a plurality of parts. The open / close solenoid valve 82 is disposed in a pipe through which compressed air flows from the air tank 76 to the paper cutting cutter 40. The open / close solenoid valve 84 is disposed in a pipe through which compressed air flows from the air tank 76 to the air blower 42. The open / close electromagnetic valve 86 is arranged in a pipe through which compressed air flows from the air tank 76 to the paper winding roller 44. The open / close solenoid valve 88 is disposed in a pipe through which compressed air flows from the air tank 76 to the triangular plate cutter 50. The open / close solenoid valve 90 is disposed in a pipe through which compressed air flows from the air tank 76 to the triangular plate air blower 52. The open /

close solenoid valves

82, 84, 86, 88, and 90 are valves that are closed when power is supplied and are opened when power is not supplied. As the open /

close solenoid valves

82, 84, 86, 88, 90, for example, single solenoid solenoid valves can be used.

The open /

close solenoid valves

82, 84, 86, 88, and 90 are opened when power is not supplied from the power source due to a power failure or the like, and the paper cutting cutter 40, the air blower 42, the paper winding roller 44, the triangular plate cutter 50, and the triangular plate air blower 52. Air is supplied from the air tank 76 to each of the above. The opening /

closing solenoid valves

88 and 90 are also switched to open / close under the control of the control device 78. Thereby, the triangular plate cutter 50 and the triangular plate air blower 52 may be opened other than during a power failure.

The control device 78 controls the rotation of the cooling cylinder 28 and the setting of the brake pressure of the brake pressure control mechanism 80. The control device 78 of this embodiment performs control processing while power is supplied from the power source 72. In addition to the rotation of the cooling cylinder 28 and the setting of the brake pressure of the brake pressure control mechanism 80, the control device 78 controls the operation of each part of the printing press 10. The printing press 10 may be provided with a main control device that controls the rotation of the cooling cylinder 28 and the operation of each unit of the printing press 10 separately from the control device 78.

The power failure detection device 79 detects a power failure of the power source 72. When the power failure detection device 79 detects a power failure, the power failure detection device 79 sends a signal indicating the power failure to the control device 78, the brake pressure control mechanism 80, and the open /

close solenoid valves

82, 84, 86, 88, 90. In this embodiment, a power failure of the power source 72 is detected by the power failure detection device 79, but it may be detected whether a power failure has occurred based on the state of power supplied to each unit. That is, without providing the power failure detection device 79, a change in power that can be determined as a power failure or a power failure in each unit may be detected and determined. Further, the printing press 10 may be set to execute processing to be described later when a power failure occurs, that is, when the received voltage reaches a voltage that can be regarded as a power failure.

Next, the brake pressure control mechanism 80 will be described with reference to FIG. The brake pressure control mechanism 80 includes a tension control unit 102, a power failure tension control unit 104, and a mode switching electromagnetic valve 106.

The tension control unit 102 is an electropneumatic converter or the like, and is a mechanism that adjusts the air pressure according to an electrical signal indicating the amount of tension. The tension control unit 102 is connected to the air tank 76 and the mode switching electromagnetic valve 106. The tension control unit 102 controls the pressure reduction level based on the control of the control device 78, and supplies the air pressure supplied from the air tank 76 to the mode switching electromagnetic valve 106 as a predetermined pressure. The control device 78 sets the brake pressure, that is, the pressure of the supplied air, based on the diameter of the web of the paper feed unit in which the paper feed brake 32 is installed. Specifically, as indicated by a dotted line 140 shown in FIG. 5, the control device 78 increases the brake torque (air pressure) as the diameter of the web increases, and decreases the brake torque (air pressure) as the diameter of the web decreases. Set the air pressure with.

The power failure tension control unit 104 is provided in parallel with the tension control unit 102 and is connected to the air tank 76 and the mode switching electromagnetic valve 106. The power failure tension control unit 104 includes switching

solenoid valves

110, 114, 118 and

pressure reducing valves

112, 116, 120. In the power failure tension control unit 104, one path is from the air tank 76 to the mode switching solenoid valve 106, and the switching solenoid valve 110, the pressure reducing valve 112, the switching solenoid valve 114, the pressure reducing valve 116, the switching solenoid valve 118, and the pressure reducing valve 120. Are connected in series. The switching

solenoid valves

110, 114, and 118 are connected to the mode switching solenoid valve 106 as separate paths. The

pressure reducing valves

112, 116, and 120 each become a resistance when passing and reduce the pressure of the compressed air.

The switching

electromagnetic valves

110, 114, and 118 are valves whose connection state is switched by the control device 78, and are maintained even when the supply of power is stopped. For example, the switching

control valves

110, 114, and 118 are provided with mechanisms for adjusting their positions at both ends by the power of electric power, and maintain the positions at that time when the received voltage becomes zero. As the switching

solenoid valves

110, 114, 118, double solenoid solenoid valves can be used. Based on the control of the control device 78, the switching solenoid valve 110 connects the pipe connected to the air tank 76 to the pipe provided with the pressure reducing valve 112 or to the pipe connected to the mode switching solenoid valve 106. Switch between. The switching electromagnetic valve 114 is connected to a pipe provided with the pressure reducing valve 112 with a pipe provided with the pressure reducing valve 116 or a pipe connected to the mode switching electromagnetic valve 106 based on the control of the control device 78. Switch the connection. The switching electromagnetic valve 118 is connected to a pipe provided with the pressure reducing valve 116 with a pipe provided with the pressure reducing valve 120 or a pipe connected to the mode switching electromagnetic valve 106 based on the control of the control device 78. Switch the connection.

The power failure tension control unit 104 controls the switching

solenoid valves

110, 114, and 118 to supply compressed air that has been supplied from the air tank 76 and has not passed through the pressure reducing valve, or compressed air that has been supplied from the air tank 76 and has passed through the pressure reducing valve 112. The compressed air supplied from the air tank 76 and passed through the

pressure reducing valves

112 and 116 and the compressed air supplied from the air tank 76 and passed through the

pressure reducing valves

112, 116 and 120 can be supplied. As the number of pressure reducing valves passing through the compressed air increases, the compressed air becomes lower in pressure.

The control device 78 switches the switching

electromagnetic valves

110, 114, and 118 based on the roll diameter (winding paper diameter) of the paper feeding take-up roll of the paper feeding unit in which the paper feeding brake 32 is installed. Specifically, as indicated by the solid line 142 shown in FIG. 5, the control device 78 increases the air pressure as the diameter of the web increases, and decreases the air pressure as the diameter of the web decreases. By switching the switching

solenoid valves

110, 114, and 118, the air pressure is changed in four stages. Note that the relationship between the brake torque and the winding diameter of the paper feed shown in FIG. 5 may be variable according to the bearing resistance depending on the number of years of operation. That is, the threshold value of the winding diameter (diameter) of the paper feed used for the air pressure in each step may be changed according to the bearing resistance.

The mode switching solenoid valve 106 is connected to the tension control unit 102, the power failure tension control unit 104, and the paper feed brake 32. The mode switching control valve 106 switches whether the compressed air supplied from the tension control unit 102 is supplied to the paper feed brake 32 or the compressed air supplied from the tension control unit 104 at the time of a power failure is supplied to the paper feed brake 32. . The mode switching solenoid valve 106 is connected to the power source 72 and receives power from the power source 72. The mode switching control valve 106 switches the supply source of compressed air depending on whether power is supplied from the power source 72. For example, the mode switching control valve 106 is biased toward one side by an elastic body such as a spring and is biased toward the other side by the power of electric power while electric power is supplied. The mode switching control valve 106 has a position where the tension control unit 102 and the paper feed brake 32 are connected to each other because the force energized by the electric power is stronger than the force energized by the elastic body when the electric power is supplied. Become. Further, the mode switching control valve 106 is in a state in which no power is supplied, that is, when the receiving voltage becomes 0, the force that is energized by the electric power is lost, and the elastic body is energized, and the force control unit 104 at the time of power failure This is the position where the paper feed brake 32 is connected. As the mode switching control valve 106, for example, a single solenoid electromagnetic valve can be used.

The brake pressure control mechanism 80 is configured as described above, and switches the switching

electromagnetic valves

110, 114, and 118 while power is supplied. The mode switching electromagnetic valve 106 of the brake pressure control mechanism 80 connects the tension control unit 102 and the paper feed brake 32 while electric power is supplied.

Next, when a power failure occurs, that is, when the receiving voltage becomes 0, the brake pressure control mechanism 80 loses the power of the power that urges the mode switching solenoid valve 106 in the other direction, and the mode force is generated by the force of the elastic body. The switching solenoid valve 106 is switched to a state in which the tension control unit 104 and the paper feed brake 32 are connected during a power failure. Further, the switching

solenoid valves

110, 114, and 118 are maintained in the open / closed state immediately before the occurrence of a power failure. That is, the switching

solenoid valves

110, 114, and 118 maintain the state as they are. Thereby, the brake pressure control mechanism 80 supplies the air pressure set by the tension control unit 104 at the time of a power failure to the paper feed brake 32 when a power failure occurs. The brake pressure control mechanism 80 may perform the above control based on the result detected by the power failure detection device 79. The brake pressure control mechanism 80 may be connected to an uninterruptible power supply.

Next, the operation of each part during a power failure will be described with reference to FIG. As shown in FIG. 6, when a power failure or the like occurs at time t1 and the machine power supply is switched from ON to OFF, power is not supplied to each unit. When a power failure occurs, the printing machine 10 stops supplying power to the cooling device 20, and the rotation of the cooling cylinder 28 of the cooling device 20 is switched from the drive control rotation whose rotation is controlled by the control device 78 to the inertial rotation. Change. As a result, the cooling cylinder 28 of the cooling device 20 does not receive the driving force of the motor, rotates in a free-run state, that is, inertia, and gradually decelerates. In the printing press 10, when the machine power is turned off, the open /

close solenoid valves

82, 84, 86, 88, and 90 are opened. The printing press 10 may detect that a power failure has occurred based on the state of the power source 72 by the power failure detection device 79. In this case, when the power failure detection device 79 detects that the machine power supply is switched from ON to OFF, the above-described operation at the time of power failure is executed.

Here, the paper cutting cutter 40 is a cutter that operates by air pressure, and cuts the web W when compressed air is supplied. When the compressed air is supplied, the air blower 42 blows the supplied compressed air in a predetermined direction. Thereby, the air blower 42 blows compressed air by supplying compressed air. At this time, the air blower 42 has a time delay α between the occurrence of a power failure and the actual blowing of air due to piping and the like, and the control timing and the actual operation timing are shifted. When the compressed paper is supplied to the paper cutting cutter 40, the paper cutting cutter 40 comes into contact with the web W and cuts the web. Further, the paper cutting cutter 40 also has a time delay β between the occurrence of a power failure and the actual cutting due to the structure and the operation time, and the control timing and the actual operation timing are shifted. When the compressed air is supplied to the paper winding roller 44, the paper winding roller 44 is in a wearing state, that is, a state in which the web W is in contact with the web W and guides the web W to wind around the cooling roller 28. Further, the paper winding roller 44 also has a time delay γ between the occurrence of a power failure and the actual cutting due to the structure and the operation time, and the control timing and the actual operation timing are shifted.

Further, when the power is turned off at time t1, the mode switching electromagnetic valve 106 of the brake pressure control mechanism 80 is operated, and the compressed air is supplied from the tension control unit 102 (automatic control). Is switched to a state in which compressed air is supplied (manual control). Here, the compressed air supplied from the tension control unit 104 at the time of a power failure is supplied at a constant pressure determined by the control device 78 in the power supply state. In addition, the printing units U1, 2, 4, and 5 are in a cylinder-removed state when power is not supplied to the pneumatic solenoid valve of the cylinder-removing device. In other words, the cylinder does not suppress the web W in the printing units U1, 2, 4, and 5.

The triangular plate cutter 50 is a cutter that operates by air pressure, and cuts the web W when compressed air is supplied. When the compressed air is supplied, the triangular air blower 52 blows the supplied compressed air in a predetermined direction. Thus, the triangular plate cutter 50 is turned off at time t1 and supplied with compressed air, so that the triangular plate cutter 50 comes into contact with the web W and cuts the web W. The triangular plate air blower 52 is turned off at time t1 and blows compressed air when compressed air is supplied. Further, the operations of the triangular plate cutter 50 and the triangular plate air blower 52 may be delayed in time.

In the printing press 10, the cooling cylinder 28 stops when a certain time elapses from the time t1 and reaches the time t2. Thereafter, at time t3, the air in the air tank 76 decreases, approaching a state where compressed air is not supplied, and then the supply of compressed air is stopped at time t4.

As described above, the printing press 10 is provided with the paper cutting cutter 40 and the winding mechanism 41, so that when a power failure occurs, the web W is cut downstream of the cooling cylinder 28 and the web W is wound around the cooling cylinder 28. Can do. As described above, when a power failure occurs, the printing machine 10 cuts the web W downstream of the cooling cylinder 28 and winds the web W around the cooling cylinder 28, so that the web W is clogged or cut at an unintended position. Can be suppressed. Further, the web W on the upstream side of the cooling cylinder 28 can be connected by winding it around the cooling cylinder 28, and the production is resumed by passing the portion wound around the cooling cylinder 28 downstream. It is possible to suppress the decrease in productivity. Moreover, it can suppress that an apparatus score increases by using the existing cooling cylinder 28. FIG. Thereby, it is possible to suppress a decrease in productivity even in an environment where a power failure occurs with a simple configuration.

Further, the printing machine 10 can provide the brake pressure within an appropriate range by providing the brake pressure control mechanism 80 that drives the paper feed brake 32 with the tension control unit 104 and the mode switching solenoid valve 106 during a power failure. It can suppress cutting and clogging. Further, the printing press 10 can cut and eliminate the web W on the folding machine F side with the triangular plate cutter 50 and the triangular plate air blower 52.

Further, it is possible to easily wind the web W by winding the web W that is supplied from above in the vertical direction and flows downward in the vertical direction and wound around the cooling cylinder 28 that discharges upward in the vertical direction.

Here, in this embodiment, the paper winding roller 44 of the winding mechanism 41 is a swing roller, but is not limited thereto. The paper winding roller 44 only needs to be able to guide the web W so as to be easily wound around the cooling cylinder 28, and may be a linear motion roller that moves in a linear direction instead of rotating. The winding mechanism 41 may be provided with a movable guide, that is, a non-rotating guide member, instead of the paper winding roller 44 as a mechanism for guiding the web W so as to be easily wound around the cooling cylinder 28. The winding mechanism 41 includes the air blower 42 and the paper winding roller 44, but only one of them may be provided.

FIG. 7 is a schematic configuration diagram showing a cooling device, a paper cutter, and a winding mechanism of a newspaper offset rotary printing press according to another embodiment. FIG. 8 is a time chart showing the operation of each part during a power failure of the newspaper offset rotary printing press shown in FIG. A newspaper offset rotary printing press according to another embodiment will be described with reference to FIGS. Since the printing machine 10a shown in FIGS. 7 and 8 has the same structure as the printing machine 10 except for the winding mechanism 41a, the description thereof is omitted.

The winding mechanism 41 a includes an air blower 42 and a fixed roller 202. The fixed roller 202 is disposed between the cooling cylinder 28 and the paper cutting cutter 40 in the conveyance direction of the web W. The fixed roller 202 faces the surface of the web W wound around the cooling cylinder 28 that does not contact the cooling cylinder 28 (the surface opposite to the surface that is in contact). Further, the fixed roller 202 is disposed at a position protruding from the tangent line 206 in contact with the cooling cylinder 28 and the guide roller 29 toward the cooling cylinder 28 (the side where the web W wound around the cooling cylinder 28 increases). Here, the tangent line 206 is a tangent line that connects the side closer to the cooling cylinder 28 and the guide roller 29. As a result, the guide roller 29 is wound around the surface of the web W wound around the cooling cylinder 28 that is not in contact with the cooling cylinder 28. Further, the printing machine 10a performs the same control operation as in FIG. 6 except that the operation of the paper winding roller 44 is eliminated as shown in FIG.

The winding mechanism 41 a can increase the winding angle around the cooling cylinder 28 by providing the fixed roller 202. Thereby, when the web W is cut into the paper cutting cutter 40, the fixed roller 202 can be in a state in which the web W on the upstream side of the cutting position is easily wound around the cooling cylinder 28. In this manner, the web W can be easily wound around the cooling cylinder by providing the fixed roller 202 at a position where the winding angle around the cooling cylinder 28 is larger than when the fixing roller 202 is not provided.

FIG. 9 is a schematic configuration diagram showing a cooling device, a paper cutting cutter, and a winding mechanism of a newspaper offset rotary printing press according to the present embodiment. FIG. 10 is a schematic diagram showing a water application apparatus. FIG. 11 is a schematic diagram illustrating the configuration of each unit that operates during a power failure of the newspaper offset rotary printing press illustrated in FIG. 9. A newspaper offset rotary printing press according to another embodiment will be described with reference to FIGS. Since the printing machine 10b shown in FIGS. 9 to 11 has the same structure as the printing machine 10 except for the winding mechanism 41b, the description thereof is omitted.

The winding mechanism 41 b includes an air blower 42, a fixed roller 202, and a water application device 210. The air blower 42 and the fixed roller 202 are the same as each part of the winding mechanism 41a. As shown in FIGS. 9 and 10, the water application device 210 is arranged on the upper side in the vertical direction of the position where the web W of the cooling cylinder 28 is not wound. The water application device 210 is operated to apply water to a position where the web W of the cooling cylinder 28 is not wound. The water application device 210 includes a water tank 220, a plurality of nozzles 222, and an open / close electromagnetic valve 230. The water tank 220 stores water. The plurality of nozzles 222 are connected to the water tank 220 and inject water when supplied with water from the water tank 220. The plurality of nozzles 222 are arranged at predetermined intervals in the axial direction of the cooling cylinder 28 and the width direction of the web W. The water application device 210 can uniformly spray water on the surface of the cooling cylinder 28 in the width direction of the web W by arranging the plurality of nozzles 222 at predetermined intervals in the width direction of the web W. The open / close control valve 230 is provided in a pipe connecting the water tank 220 and the air tank 76. As shown in FIG. 11, the open / close control valve 230 is supplied with power from a power source 72. The open / close control valve 230 is a valve that is closed when power is supplied and is opened when power is not supplied.

The water application device 210 has the above-described structure, and operates when a power failure occurs in the same manner as the air blower 42. Specifically, the open / close solenoid valve 230 is opened, and compressed air is supplied from the air tank 76 to the water tank 220. When compressed air is supplied to the water tank 220, the stored water is pumped toward the nozzle 222. The water sent from the water tank 220 to the nozzle 222 is applied to the area of the cooling cylinder 28 that is not in contact with the web W. The water application device 210 applies water to a region of the cooling cylinder 28 that is not in contact with the web W, so that when the surface to which the water is applied comes into contact with the web W, the web W adheres to the cooling cylinder 28. The web W can be easily wound around the cooling cylinder 28.

It is preferable that the water application device 210 applies an amount of water to the cooling cylinder 28 so that the web W cannot be wet and become weak. Moreover, although the water application apparatus 210 of a present Example conveyed water with the force of air, it is not limited to this. For example, the water application device 210 may have a structure in which an electromagnetic valve is provided in the water flow path and is released when a power failure occurs and water is applied. The water application device 210 may have a structure in which, when a power failure occurs, the water tank 220 is tilted and water is spilled from the water tank 220 when water force is applied or the retained force is lost. .

In this embodiment, the web W can be easily wound, a paper cutting cutter and a winding mechanism can be easily installed, and the ink is sufficiently cooled, so that the ink is not easily rubbed by the fixed roller. However, the present invention is not limited to this, and the cooling cylinder 28 for winding the web may be other than the final stage.

FIG. 12 is a schematic configuration diagram showing a cooling device, a cutter, and a winding mechanism of a newspaper offset rotary printing press according to another embodiment. The printing machine 10c shown in FIG. 12 has the same structure as that of the printing machine 10 except for the installation position of the paper cutting cutter 40 and the winding mechanism 41c, and thus the description thereof is omitted.

The paper cutting cutter 40 is disposed at a position facing the web W between the cooling cylinder 26 and the cooling cylinder 27 in the conveyance path of the web W. The paper cutting cutter 40 can cut the web W between the cooling cylinder 26 and the cooling cylinder 27.

The winding mechanism 41c is a device that assists in winding the portion upstream of the cutting position of the cut web W around the cooling cylinder 26 when the web W is cut by the paper cutter 40. The winding mechanism 41 c includes an air blower 42 and a fixed roller 212. The air blower 42 and the fixed roller 212 are the same as the air blower 42 and the fixed roller 202 of the winding mechanism 41a.

The air blower 42 is disposed at a position facing the web W between the cooling cylinder 26 and the paper cutting cutter 40 in the conveyance path of the web W. The fixed roller 212 is disposed between the cooling cylinder 26 and the paper cutting cutter 40 in the web W conveyance direction.

As shown in FIG. 12, the printing machine 10 is provided with a paper cutting cutter 40 and a winding mechanism 41c between the cooling cylinder 26 and the cooling cylinder 27, which are between the cooling devices 20a, so that the cooling cylinder 26 and the cooling mechanism 26 are cooled during a power failure. The web W between the cylinder 27 may be cut and the web W may be wound around the cooling cylinder 26.

Further, the printing press 10 may detect that a power failure has occurred based on the state of the power source 72 by the power failure detection device 79 and send a signal indicating that a power failure has occurred to each unit. In this case, each part of the printing press 10 receives the signal indicating that a power failure has occurred, and executes the above-described operation at the time of the power failure.

In each of the above-described embodiments, the printing press of the present invention is applied to a newspaper offset rotary printing press. However, the printing press can also be applied to a general printing press such as a commercial offset printing press.

R paper feeding device R1 to R5 paper feeding unit I infeed device I1 to I5 infeed unit U printing device U1 to U5, U11 to U52 printing unit D web pass device D1, D2 web pass unit F folding machine F1, F2 folding unit DESCRIPTION OF SYMBOLS 10 Newspaper rotary press 19 Drying device 20 Cooling device 32 Paper feed brake 40

Paper cutting cutter

41, 41a, 41b, 41c Winding mechanism 42 Air blower 44 Paper winding roller 44a Roller 44b Drive unit 50 Triangular plate cutter 52 Triangular plate air blower 72 Power supply 74 Compressor 76 Air tank 78 Control device 80 Brake

pressure control mechanism

82, 84, 86, 88, 90 Open / close solenoid valve 102 Tension control unit 104 Power failure tension control unit 106 Mode switching

solenoid valve

110, 114, 118 Rikae solenoid valve (double solenoid)
112, 116, 120

Pressure reducing valve

202, 212 Fixed roller 210 Water application device W web

Claims

A paper feeding device for feeding a web from a web,
A printing device for printing on the web supplied from the paper feeding device;
A drying device for drying the web printed by the printing device;
A cooling device that winds and cools the web dried by the drying device around a rotatable cooling cylinder;
A folding machine that folds the web cooled by the cooling device to form a fold;
A cutter that is disposed downstream of the cooling cylinder and cuts the web in the event of a power failure;
And a winding mechanism for winding the web cut by the cutter around the cooling cylinder.
The winding mechanism is disposed at a position not in contact with the web passing between the cutter and the cooling cylinder, and in the event of a power failure, the winding mechanism moves to a position closer to the cooling cylinder than the moving path of the web. The printing machine according to claim 1, further comprising a paper winding roller.
The winding mechanism is disposed between the cooling cylinder and a guide roller that guides the web, and is fixed at a position that protrudes toward the cooling cylinder from a tangent line that contacts the cooling cylinder and the guide roller. The printing press according to claim 1, further comprising a roller.
The cooling device has a plurality of the cooling cylinders,
The winding mechanism is disposed between a specific cooling cylinder that winds the web and a downstream cooling cylinder that is disposed on the downstream side of the specific cooling cylinder, and a tangent line that contacts the specific cooling cylinder and the downstream cooling cylinder. The printing press according to claim 1, further comprising a fixed roller disposed at a position protruding toward the specific cooling cylinder.
The printing machine according to any one of claims 1 to 4, wherein the winding mechanism includes an air blower that blows air in a direction of urging the web toward the cooling cylinder during a power failure.
The printing machine according to any one of claims 1 to 5, wherein the winding mechanism includes a water application device that applies water to the surface of the cooling cylinder during a power failure.
The printing machine according to any one of claims 1 to 6, wherein the cooling cylinder rotates with inertia in the event of a power failure.
The paper feeder has a paper feed brake driven by air pressure,
A tension control unit that adjusts the air pressure supplied to the paper feed brake, an emergency tension control unit that can switch the setting of the air pressure supplied to the paper feed brake in multiple steps, and the air that has passed through the tension control unit A brake pressure control mechanism having a mode switching unit that switches between supplying to the paper brake or supplying air that has passed through the emergency tension control unit to the paper feed brake;
The mode switching unit is switched from a state in which air that has passed through the tension control unit during a power failure is supplied to the paper feed brake to a state in which air that has passed through the emergency tension control unit is supplied to the paper feed brake,
8. The printing press according to claim 1, wherein the control device switches the setting of the air pressure based on a roll diameter of the web of the paper feeding device during power feeding. 9.
It further has a power failure detection device for detecting power failure,
When the power failure detection device detects a power failure, the cutter cuts the web, and the web cut by the cutter is wound around the winding mechanism. Printing machine.