JPH051144B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for resetting various cylinders used in printing presses, such as impression cylinders.

(Prior Art and its Problems) Conventionally, business forms have generally been printed using high-speed form rotary presses. However, form rotary presses are very large and require a lot of time to switch and adjust printing patterns, and a large amount of waste paper is generated during these adjustments. Various offset form printing machines have been developed.
In general, these form printing machines use an impression cylinder and a blanket cylinder, which rotate opposite each other, to separate from each other at a predetermined timing, and then print continuous paper that is inserted between the impression cylinder and the blanket cylinder at a predetermined timing. Form printing is performed by intermittent feeding.
Since the impression cylinder is driven between a predetermined release position and a loading position by a release cylinder mechanism using a cam that rotates in synchronization with the rotation of the blanket cylinder, the impression cylinder can be moved arbitrarily depending on the paper size. There were problems such as the fact that the cylinder could not be detached from the machine at this position, and that the speed of loading and unloading the cylinder could not be adjusted, giving a shock to the machine and shortening its life. Furthermore, even when the continuous paper is stopped, the impression cylinder is always moved to the loading position for each rotation of the blanket cylinder, which causes unnecessary tension to be applied to the continuous paper inserted between the blanket cylinder and the impression cylinder. In addition, there was a problem in that the marginal punch of the continuous paper, which was engaged with the paper conveying pin of the pin feed tractor, was damaged. As a measure to solve such problems, it has been proposed, for example, to control the drive of the impression cylinder by using a pulse motor. In order to move accurately between the position and the mounting position,
A method is needed to accurately reset the impression cylinder to its initial unloaded position. For this purpose, for example, if the barrel release position is forcibly restricted by a rotation prevention mechanism such as a rotation stopper, the pulse motor will not necessarily stop at the correct step stop position when rotation is prevented; If the pulse motor stops at an intermediate position, subsequent operations will be inaccurate and it will be difficult to perform accurate take-off and landing cylinder control only by counting drive pulses.

(Object of the Invention) Therefore, the object of the present invention is to solve the above-mentioned problems and to ensure the reset operation of a printing pressure control device for controlling the center distance between two cylinders in a printing press. An object of the present invention is to provide a reset method for accurate printing pressure control.

(Means for Achieving the Object) In order to achieve the above object, a reset method for a printing pressure control device according to the present invention includes a printing pressure control device that controls printing pressure between a first cylinder and a second cylinder. In the resetting method, the printing pressure control device includes: an eccentric shaft into which the first cylinder is rotatably fitted; and the first cylinder is connected to the eccentric shaft to rotate the eccentric shaft at a desired angle. and the first rotation angle according to the rotation angle of the eccentric shaft.
a pulse motor that changes the distance between the axes between the first cylinder and the second cylinder; a reset position sensor disposed at a rotational phase angle of the pulse motor that corresponds to the reset position of the first cylinder; , a sensor dog that rotates while following the rotation of the pulse motor and acts on the reset position sensor, and after rotating the pulse motor in one direction for a predetermined number of counts, subsequently rotates the pulse motor in the opposite direction to the one direction. The reset position sensor is rotated to a position where it is operated by the sensor dog, and that position is set as a reset position.

(Function) By rotating the eccentric shaft into which the first cylinder is rotatably inserted by a pulse motor connected to this eccentric shaft, the distance between the shafts of the first cylinder and the second cylinder can be changed. You can freely set the printing pressure and control the printing pressure.

A reset position sensor is disposed at a rotational phase angle of the pulse motor corresponding to the reset position of the first cylinder, and a sensor dog rotates following the rotation of the pulse motor and acts on the reset position sensor. By rotating the pulse motor extra in either direction (one direction), rotating it in the direction of the reset position sensor (in the opposite direction), and electrically stopping it when the reset position sensor operates, the pulse The motor is reliably prevented from stopping in the middle of the step, and this position is used as a reset position and rotated for a predetermined count, thereby ensuring subsequent control of printing pressure.

(Embodiment) General Structure FIG. 1 is a schematic cross-sectional view of a multicolor offset printing press capable of printing on continuous paper to which the printing press cylinder reset method according to the present invention is applied. As shown in the figure, a blanket cylinder 2 is disposed approximately in the center of the printing press body 1, and a plate cylinder that can be freely detached from and attached to the blanket cylinder 2 is located at an upper rear position and a lower rear position of the blanket cylinder 2. 3 and 4 are arranged respectively. At the rear of these plate cylinders 3, 4, there are plate supply/discharge units 5, 6 that enable automatic plate supply/discharge to the corresponding plate cylinders 3, 4, and plate supply/discharge units 5, 6 for automatically supplying/discharging plates to/from the corresponding plate cylinders 3, 4, as well as plate supply/discharge units 5, 6 for automatically supplying/discharging plates to/from the corresponding plate cylinders 3, 4. Inking units 7 and 8 for inking are each removably attached, and supply and discharge plate trays 9 and 10 are detachably attached to each plate supply and discharge unit 5 and 6, respectively.

On the other hand, at the lower front position of the blanket body 2,
An impression cylinder 11 that can be freely attached to and taken off from the blanket cylinder 2 is disposed, and paper feeding of the continuous paper 12 passed between the impression cylinder 11 and the blanket cylinder 2 is carried out at the rear and front positions of the lower part of the impression cylinder 11. A pin feed tractor 13 and a suction conveyor 14 are respectively provided for control. The pin feed tractor 13 and the suction conveyor 14 control the paper feed of the continuous paper 12 intermittently in relation to the timing of the separation of the impression cylinder 11 and the blanket cylinder 2, and feed the continuous paper 12 intermittently.
2, printing is performed. Also,
A folding machine 17 having a swinging guide 15 and a continuous paper holder 16 for storing printed continuous paper 12 in an alternately folded manner is arranged at a front position of the printing press body 1.

In addition, at the upper front position of the blanket body 2,
When cleaning the blanket, the blanket body 2
Cleaning liquid supply unit 1 for supplying cleaning liquid to
8 and a wiping unit 19 for wiping off the cleaning liquid are each removably attached.
Furthermore, an impression cylinder cleaning unit 29 is provided below the impression cylinder 11 to remove dirt from the surface of the impression cylinder.

A main motor 20 is installed in the lower space of the printing press body 1, and the blanket cylinder 2 and suction conveyor 14 are driven by the main motor 20 via, for example, a belt. The cylinder 11 is mechanically interlocked with gears disposed to mesh at one end of each cylinder, forming a drive system using a main motor 20. Drive devices or actuators such as pulse motors and solenoids are attached to the remaining mechanical parts as necessary, and sensors and switches are installed at predetermined and necessary locations as information input means for controlling the drive timing of these drive systems. It is installed.

FIG. 2 schematically shows a control system used in this printing press, in which a microprocessor 21 is connected to external devices 24 to 28 via a control bus 22 and each control section 23. The system program is stored in an external storage device 24 such as a floppy disk, and is given to the microprocessor 21 at the beginning of system startup. The operator gives commands through an operation panel 25 installed on the side of the printing press, and the microprocessor 21 receives necessary information from sensors and switches 26 and 27 to operate the motors and motors according to the system program. The drive system 28 such as a solenoid is operated as appropriate.

Paper Conveyance System In this printing machine, the paper conveyance system is composed of a pin feed tractor 13 and a suction conveyor 14, and is connected to the rotation of the blanket cylinder 2 and the impression cylinder 11 and the take-off cylinder based on commands from the microprocessor 21. to control the paper feed of the continuous paper 12. The continuous paper 12 used has marginal punches on both left and right ends that engage with the pins of the pin feed tractor 13, and even if it is folded paper with creases or perforations in the vertical direction, the roll paper does not have creases. It may be. In the following description, a case will be described in which folded paper is used.

Pin Feed Tractor Configuration FIGS. 3A, 3B, and 3C are a plan view, a front partial sectional view, and a right side view, respectively, showing the mechanism of an embodiment of the pin feed tractor 13. This pin feed tractor 13 is constructed by joining the assembly reference planes of the left tractor frame 1320 and the right tractor frame 1321 to the reference planes of high-precision linear bearing movers 1303 and 1304, respectively, aligning them in parallel, and then fixing them. Tractor frame 132
0,1321 for left and right tractor units 130
1,1302 are attached to form a unit. In other words, the left and right tractor units 1301 and 1302 can be aligned in parallel without using a jig or the like. Furthermore, the mover 1303 on the left side is the guide rail 13 of the linear bearing.
05 in the fixed position, and the right side mover 1304 is not fixed but moves on the guide rail 130.
5, and the interval between the left and right tractor units 1301, 1302 can be changed arbitrarily according to the paper width of the continuous paper 12.

Mover 1304 of right tractor unit 1302
A screw 1307 with a flat ball is provided at the bottom of the screw 1307, which is configured to rotate according to the rotation of the lever 1306.
are bored and screwed upward, and the lever 130
Screw 1 by turning 6 counterclockwise.
307 upward and press the flat ball at the tip against the guide rail 1305 of the linear bearing,
Due to the pressing force, the right tractor unit 1302
is designed to be locked at a desired position. A similar screw with a flat ball is used to fix the left tractor unit 1301 in place.

The left and right tractor units 1301 and 1302 each have paper conveyance timing belts 1308 and 1309 wound around a pair of front and rear pulleys, and the left and right front pulleys are connected by a spline shaft 1310 to rotationally drive the spline shaft 1310. Possibly left and right paper conveyance timing belt 130
8,1309 move forward and backward in synchronization.
Left and right paper conveyance timing belts 1308, 1309
Paper conveying pins 1311 are attached at regular intervals to the paper conveying pins 1311, and by engaging the marginal punches at both left and right ends of the continuous paper 12 and moving the paper conveying timing belts 1308 and 1309 back and forth synchronously, continuous The paper 12 is fed forward and backward. In order for the paper to be fed smoothly, the phases of the paper conveyance pins 1311 in the left and right tractor units 1301 and 1302 must match accurately, and this phase alignment of the paper conveyance pins 1311 is performed as described below. . That is, as shown in FIG. 3E, the left and right front pulleys 1322 and 1323 are connected to the left and right bearings 13 in advance outside the unit.
24 and 1325 respectively, and after fitting, the side surfaces of the front pulleys 1322 and 1323 are brought together and the spline shaft 1310 is pushed in. After performing phase alignment with the spline shaft as a reference, the left and right bearings 1324 and 1325 are fitted. Front pulley 132
2 and 1323 are fixed with screws 200 to establish an accurate phase relationship, and finally the pair of front pulleys 1322 and 1323 are assembled into the left and right tractor units 1301 and 1302, respectively. According to this method, as shown in Fig. 3E, the fixing screw 200 is attached from the outside of the front pulleys 1322, 1323, so phase alignment can be performed outside the machine, and when phase alignment is performed on the machine. The work is easier and the accuracy is improved compared to the previous method.

In addition, left and right tractor units 1301, 1302
Paper holding lids 1312 and 1313 are respectively disposed to cover the upper surface of the paper conveyance pin 1311, and a paper receiving guide plate 131 is provided on the lower surface side of the paper holding lids 1312 and 1313, respectively.
4 and 1315 are respectively disposed, and the left and right ends of the continuous paper 12 are sandwiched between them to guide the paper feed of the continuous paper 12 while preventing the marginal punch from coming off the paper conveyance pin 1311.

In order to remove paper dust attached to the marginal punch of the continuous paper 12, the left and right tractor units 130
Paper dust removing units 1316 and 1317 are provided at the rearmost ends of the paper sheets 1 and 1302 (ie, on the inlet side of the continuous paper 12), respectively. This paper dust removing section 1316,
1317 is provided with paper powder removal brushes (not shown) and appropriate spaces facing each other above and below the passing surface of the continuous paper 12, and this space is attached to the printing press main body 1 using, for example, a flexible tube material. The space is connected to a suction blower (not shown) provided therein, and the air in the space is suctioned and exhausted by the suction blower, thereby suctioning and discharging the paper dust.

In addition, a paper presence/absence limit switch 1318 is attached to the lower center of the paper receiving guide plate 1314 of the left tractor unit 1301 on the fixed side.
An operating spring 1319 for operating this paper presence/absence limit switch 1318 is connected to the paper receiving guide plate 13.
It projects upward at the left end of the continuous paper 14, and when the continuous paper 12 is set, an operating spring 1319 is pushed down and a paper presence/absence limit switch 1318 is activated, thereby detecting the presence or absence of the continuous paper 12.

The unit of the pin feed tractor 13 configured as described above has left and right brackets 182,
It is installed between the left and right main frames 180 and 181 of the printing press main body 1 via the main frame 183 . As shown in FIG. 3D, the left and right brackets 182, 183 consist of a frame mounting part 184 and a rail receiving part 185, and the rail receiving part 185 has a groove 18 for receiving the guide rail 1305 of the linear bearing.
6 is cut, and the guide rail 1305 is fitted into this groove and fixed with a screw 187.

The left and right brackets 182 and 183 are installed at predetermined positions on the left and right main frames 180 and 181, and the positioning when installed is done using the left and right main frames 18.
Each pair of positioning knob pins 188, 189 and 19 are formed in advance at predetermined positions of 0 and 181.
This is done using 0.191 as a reference. Knock pin 18
8 and 190 fit into positioning holes provided in the frame mounting portion 184 to connect the left and right brackets 182 and 1.
83 to the left and right main frames 180, 181, respectively.
Reference numerals 9 and 191 respectively regulate the inclination angles of the left and right brackets 182 and 183 (that is, the inclination angles of the pin feed tractor 13 to be mounted thereon) at the regulated mounting positions.

By fitting and mounting the guide rail 1305 of the linear bearing on the rail receiving portion 185 of the left and right brackets 182, 183, which are thus precisely positioned and fixed in the predetermined positions of the left and right main frames 180, 181 of the printing press main body 1. Therefore, it becomes possible to easily mount the pin feed tractor 13 at a predetermined position on the printing press main body 1 at a predetermined angle with high accuracy. When the main body is attached, the paper setting reference position (P ₁ ; see FIG. 9) of the pin feed tractor 13 is located a predetermined distance H from the printing start position P ₂ .

As described above, the left and right tractor units 130
1,1302 parallel alignment and paper transport pins 1
Phase matching of 311 is done by moving element 1 of linear bearing.
This has already been done when fixing the left and right tractor units 1301 and 1302 to 303 and 1304, respectively.
3, 1304 only moves in parallel in the left and right direction on the guide rail 1305, so the above parallel relationship and phase relationship after adjustment are then changed to the guide rail 13.
05 is not damaged until it is attached to the left and right brackets 182, 183, so when the pin feed tractor 13, which has been assembled into a unit and has been completed, is attached to the printing press body 1, the left and right tractor units 1301, There is no need to perform troublesome adjustments such as parallel alignment of the paper transport pins 1302 and phase alignment of the paper conveyance pins 1311. Furthermore, since these adjustments can be made outside the machine before the pin feed tractor 13 is attached to the printing press main body 1, the adjustments can be made easily and accurately.

A tractor driving DC servo motor 192 is disposed on the outside of the left main frame 180 of the printing press body 1, and a pulley 193 connected to the rotating shaft of this DC servo motor 192 is disposed on the inside of the left main frame 180. Similarly, a timing pulley 194 provided inside the left main frame 180
A timing belt (not shown) is wound between the pulley 193 and the timing pulley 194, and the timing pulley 194 is positioned and fixed on the spline shaft 1310.
A drive system is configured so that the left and right paper conveyance timing belts 1308 and 1309 are moved forward and backward by rotating the timing belt 310. And DC servo motor 19
The rotary encoder 196 is connected to the DC servo motor 19 in order to know the number of rotations (i.e. paper conveyance speed).
2 rotation shaft, and spline shaft 1.
310 (i.e., the position of the paper conveyance pin 1311), another rotary encoder 197 is installed outside the left main frame 180 on the pulley 1.
It is attached to the rotating shaft of 94.

In front of the pin feed tractor 13, upper and lower guide plates 198, 199 are installed to extend to just before the impression cylinder 11, and the continuous paper 12 sent out from the pin feed tractor 13 is inserted between them to move between the blanket cylinder 2 and the impression cylinder 11. I'm trying to guide you.

Suction Conveyor Configuration Figures 4A to 4D are mechanical explanatory diagrams showing one embodiment of the suction conveyor 14. This suction conveyor 14 is capable of switching the suction force in three stages, and also has a variable suction width according to the paper width. . FIG. 4A shows the impression cylinder 11
It is a left side explanatory view showing the attachment position of the suction conveyor 14 to the. As shown, the suction conveyor 14
In this case, the paper guide 1401 is located at a position slightly advanced from the top of the impression cylinder 11 in the rotating direction, and the conveyor belt 1402 moves obliquely between the blanket cylinder 2 and the impression cylinder 11 with its conveyance surface being approximately horizontal. It is positioned and fixed between the left and right main frames 180 and 181 (see FIG. 4C) of the printing press main body 1 so as to horizontally guide the continuous paper 12 that has been rolled in the forward discharge direction. Further, above the suction conveyor 14, a blowing means consisting of a paper presser fan 30 is arranged to blow air toward the top surface of the suction conveyor 14 along its longitudinal direction, so that the continuous paper 12 floats above the top surface of the conveyor during paper feeding operation. We are trying to prevent this.

4B, 4C, and 4D are plan, front, and right side mechanical explanatory views of the suction conveyor 14, respectively. A suction duct 1404 having a large number of suction slits 1403 on the upper surface runs in the center left and right direction of the suction conveyor 14, and in front and behind this suction duct 1404, a pair of pulleys 1405 are provided for each two suction slits. 14
06 is provided. One conveyor belt 1402 is wound around each of these front and rear pair of pulleys 1405 and 1406, and a gear 14 is attached to the left end of the common rotation shaft 1407 of the front pulley 1405.
08, and this gear 1408 is meshed with a drive gear 1409 that is mechanically connected to the main motor 20 via, for example, a belt, so that the conveyor belt 1402 is fixed in the forward direction according to the rotation of the main motor 20. I try to fast forward. Conveyor belt 1
402 is provided with a large number of suction holes 1410 at positions corresponding to the suction slits 1403. With this configuration, the continuous paper 12 sent from between the blanket cylinder 2 and the impression cylinder 11 is sucked onto the upper surface of the conveyor 1402 and guided toward the folding machine 17 in the front.

The left end of the suction duct 1404 is the main frame 1
It communicates with a suction blower (not shown) via a connecting portion 1411 provided on the outside of the suction duct 80, and the air in the suction duct 1404 is sucked and exhausted in accordance with the rotation of the suction blower. On the other hand, there are two openings 1412 and 1 at the right end of the suction duct 1404.
413, a main shutter 1414 is provided corresponding to one opening, and an auxiliary shutter 1415 is provided corresponding to the other opening. And these main shutters and auxiliary shutters 1414,
1415 to connecting members 1416 and 1417, respectively.
Suction force switching solenoid 1418, 141 via
The solenoid 1
When 418 and 1419 are not energized, the main and auxiliary shutters 1414 and 1415 close to the opening 141, respectively.
2, 1413 is closed, and when energized, the corresponding main shutter 1414 and/or auxiliary shutter 14
15 slides downward to open openings 1412 and/or 1413.

FIG. 4E is an explanatory cross-sectional view showing the shutter portion. Main/auxiliary shutters 1414, 1415
is located in the shutter room 1425, and the main
When the auxiliary shutters 1414 and 1415 are in the "open" state, outside air sucked from below the shutter chamber 1425 is sucked into the suction duct 1404 through the openings 1412 and 1413. In this way, the amount of outside air sucked into the suction duct 1404 from the openings 1412 and 1413 is changed according to the opening and closing of the main and auxiliary shutters 1414 and 1415, and the amount of outside air sucked from the suction hole 1410 of the conveyor belt 1402. By adjusting the , it is possible to switch between three levels of suction power as shown below.

Main shutter Auxiliary shutter Suction force Closed Closed Large Closed Open Medium Open Open Small Also, the state of the solenoids 1418 and 1419 (i.e. the main and auxiliary shutters 1414 and 1415
In order to know the opening/closing state of the connecting member 1416,1
417, respectively, and photoelectric sensors 1428 and 1429, as shown in FIG. 4E, are arranged at positions where light is shielded when the power is on (positions in FIG. 4E, a), respectively.

Two-stage sliders 1430 and 1431 are arranged in close contact with each other on the left end of the inside of the upper surface of the suction duct 1404, and the first stage 1430 of the two-stage slider
By sliding the slit 1403 to the left with a knob 1432, the slit 1403 can be closed within a predetermined range, thereby making it possible to adjust the suction width to any width between the maximum suction width and the minimum suction width. It's like this. 1st stage slider 14
4F shows how the second-stage slider 1431 is driven to push out as the slider 30 moves. A pair of suction slits 1403 are provided on the second stage slider 1431.
An opening 1433 having the same shape as that of the suction slit 1403 is provided at a corresponding position, and a larger opening 1434 that can accommodate another pair of suction slits 1403 is provided at a corresponding position. The suction slits are successively shielded from the left side. The change in the suction width at each step shown in FIG. 4F is represented by the horizontal bar in FIG. 4G. In this way, a large amount of shielding can be obtained with a small amount of movement. Note that the second stage slider 143
1 is engaged with a return means (not shown) such as a spring so that it returns to its original position (positions a and b in FIG. 4F) when the pressing force of the first stage slider 1430 is removed.

Separation cylinder mechanism FIG. 5A is an explanatory diagram of a separation cylinder mechanism for the impression cylinder 11 with respect to the blanket cylinder 2. As shown in the figure, the impression cylinder 11 is connected to the support shaft 1 through left and right bearings 1101.
It is rotatably arranged around the impression cylinder 102.
1, the gear 1103 disposed at one end of the impression cylinder 11 is driven by the gear 2 at one end of the blanket cylinder 2 driven by the main motor 20.
This is done by meshing with 01. That is, the impression cylinder 11 is always driven to rotate regardless of the state of the take-off cylinder. Both ends of the support shaft 1102 are eccentric shafts 1
104, 1105, and these eccentric shafts 1104, 1105 are connected to the left and right main frames 18.
Eccentric bearing part 15 arranged on the outside of 0.181
0,151, respectively. The left eccentric shaft 1104 is connected to the rotating shaft of an impression cylinder pulse motor 153 via a helical coupling 152, and by rotationally driving the left eccentric shaft 1104 by the impression cylinder pulse motor 153, the support shaft 110 is rotated.
2 is moved, and the distance between the axes of the impression cylinder 11 and the blanket cylinder 2 is changed accordingly, so that the impression cylinder 11 is moved into and out of contact with the blanket cylinder 2.

FIG. 5B is an explanatory view schematically showing the state of the unloading/unloading cylinder. FIG. 5B a shows the state when the cylinder is unloaded, and FIGS. 5B b and c show the state when the cylinder is attached. In the figure, point B is the center of the blanket body 2, and point I
indicates the center of the support shaft 1102 (ie, the center of rotation of the impression cylinder 11), and point S indicates the center of the left and right eccentric shafts 1104, 1105 (ie, the center of swing of the impression cylinder 11). At the time of detachment in Figure 5a, the straight line SI and the straight line
BI forms a large angle as shown in the diagram,
The left eccentric shaft 1104 is driven by the impression cylinder pulse motor 153.
As is rotated counterclockwise in the figure, this angle gradually becomes smaller, and accordingly, the impression cylinder 11 moves to point S.
The cylinder swings counterclockwise around , and the distance between the axes of the impression cylinder 11 and the blanket cylinder 2 (distance between points BI) gradually decreases. And the straight line SI is the 5th B
When the impression cylinder 11 reaches the position shown in Fig. b, it is attached to the blanket cylinder 2. In order to apply an appropriate printing pressure, the impression cylinder pulse motor 153 is further driven so that the straight line SI coincides with the straight line BI. 5th one a little before
The center of rotation I of the impression cylinder 11 is brought closer to the center B of the blanket cylinder 2 (that is, the distance between the axes is further reduced) until the state shown in FIG.

When changing the printing pressure depending on the printed material, for example, the impression cylinder pulse motor 153 is driven between the rotation angles of the eccentric shaft shown in FIGS. You just have to change it appropriately. However, for example, when trying to hold the impression cylinder 11 in a state close to the rotation angle of the eccentric axis shown in Fig. 5B (b) (that is, when the printing pressure is relatively weak), the repulsive force from the blanket cylinder 2 is as shown in Fig. 5B (b). As can be easily understood from the positional relationship, a very large moment is applied to the impression cylinder pulse motor 153,
In order to stably support this large repulsive force, it would be necessary to use a very large pulse motor, so although it is possible, it is not necessarily practical.

Therefore, in a preferred embodiment, the position shown in FIG. ing. Fifth
At the position shown in Figure B, c, the straight line SI almost coincides with the straight line BI, so the repulsive force from the blanket cylinder 2 is only applied to the impression cylinder pulse motor 153 as a very small moment. Therefore,
It becomes possible to use a small pulse motor.
If the straight line SI coincides with the straight line BI and reaches the top dead center,
The moment applied to the impression cylinder pulse motor 153 is 0.
However, the impression cylinder pulse motor 153 moves the blanket cylinder 2 in any direction from the top dead center.
The stability of the mechanism is significantly impaired, as there is uncertainty as to whether it will be biased and rotated by the repulsive force. Therefore, it is important to select the position shown in FIG. 5B, c, just before top dead center as the trunk mounting position, and in the preferred embodiment, the angle between the straight line BI and the straight line SI is about 5 degrees.

Advantages of using a pulse motor as the drive unit for the loading/unloading cylinder mechanism of the impression cylinder 11 include the following. First, since the loading speed can be easily controlled, there is less impact on the printing press, which extends the life of the machine. Second, it becomes possible to separate and release the cylinders at arbitrary phases, and it is possible to easily cope with changes in the vertical length of the paper to be printed.
Thirdly, when printing on continuous paper, it is possible to maintain the impression cylinder 11 in the unloading position when the blanket cylinder 2 is rotating while paper feeding is stopped. No unnecessary tension is exerted on the paper, and the marginal punch engaged with the pin 1311 of the pin feed tractor 13 is not damaged. Fourth, if more printing pressure than necessary is applied, the holding force of the impression cylinder pulse motor 153 will be exceeded and step-out will occur, so the impression cylinder 11 will naturally come into the detached state and serve as a safety device.

Next, the printing pressure adjustment spring mechanism will be described with reference to FIGS. 5A, 5C, and 5D.
FIG. 5C is a left side view of FIG. 5A, and FIG. 5D is an explanatory right side view. As shown in FIGS. 5A, 5C, and 5D, a cross-shaped printing pressure arm 154 is attached to the thrust bearing 15 on the outside of the left main frame 180 for the purpose of adjusting the printing pressure.
5 and a needle bearing 156, the support shaft 157 is reinforced by a pin block 173 and fixed to the left main frame 180. Correspondingly, on the outside of the right main frame 181, a cross-shaped printing pressure arm 158 is also provided with a thrust bearing 159 and a needle bearing 16.
The support shaft 161 is reinforced by a pin block 174 and fixed to the right main frame 181. Then, the left eccentric bearing part 150 is attached to the through hole in the center of the left printing pressure arm 154, and the left eccentric shaft 1104 is inserted therein, and the right eccentric shaft bearing part 150 is inserted into the through hole in the center of the right printing pressure arm 158. The core bearing part 151 is attached and the right eccentric shaft 1105 is inserted, and the support shaft 1102 swings in response to the swings of the left and right printing pressure arms 154, 158, and the impression cylinder 11 swings accordingly to complete the blanket. It is configured so that the pressing force (ie, printing pressure) on the cylinder 2 changes. The impression drum pulse motor 153 is placed and fixed on the left printing arm 154 and swings as the left printing arm 154 swings. The left and right printing pressure arms 154 and 158 are biased in the same swing direction (in the direction of body loading) by left and right printing pressure main compression springs 162 and 163 and left and right printing pressure auxiliary compression springs 164 and 165, respectively.
Its swing range is the left and right impression cylinder stoppers 166a, 1
67a. When the rotational phase of the impression cylinder pulse motor 153 is at the cylinder release position (the phase shown in FIG. 5B a), the left and right printing pressure arms 15
4 and 158 are impression cylinder stoppers 166a and 158, respectively.
167a, and when the rotational phase of the impression cylinder pulse motor 153 is at the cylinder loading position (the phase shown in FIG. The mechanical parts are arranged in a positional relationship that allows the blanket to come to a halt at a point away from the stoppers 166a, 167a, where the repulsive force from the blanket body 2 and the repulsive force of the compression springs 162 to 165 are balanced. . As a result, the compression springs 162 to 16
By changing the repulsive force 5, it becomes possible to adjust the printing pressure as desired.

In this embodiment, as a means for changing the repulsive force of the compression springs 162 to 165, a left and right printing pressure adjustment screw 16 is used for the left and right printing pressure main compression springs 162 and 163.
5 and 166, respectively, so that the degree of compression of the left and right printing pressure main compression springs 162 and 163 can be changed continuously. The left and right printing pressure adjustment screws 165 and 166 are driven in conjunction with each other by a common drive mechanism (not shown) via left and right printing pressure adjustment worm wheels 167 and 168, respectively, so that equal printing pressure can always be obtained on the left and right sides. It is configured so that These left and right printing pressure adjustment screws 165, 166 and printing pressure adjustment worm wheel 1
67 and 168 are connected to the left and right main frames 1 via left and right printing pressure adjustment brackets 169 and 170, respectively.
It is fixed at 80,181. Further, the support shafts of the left and right impression cylinder stoppers 166a, 167a and the left and right printing pressure auxiliary compression springs 163, 165 are fixed to the left and right main frames 180, 181 via left and right brackets 171, 172, respectively.
In this embodiment, the left and right printing pressure auxiliary compression springs 1
64, 165 to ensure a constant printing pressure in advance, and left and right printing pressure main compression springs 162, 163.
Since the printing pressure is adjusted by changing the compression degree of ) becomes easier.

In order to restrict the rotation range of the impression cylinder pulse motor 153 between the cylinder release position and the cylinder loading position, a stopper 175 is attached to the left eccentric shaft 1105 as shown in FIG. 5D, and the movable range of the stopper 175 is limited. It is limited to a predetermined angle by a stopper pin 176. In order to know the rotational phase of the impression cylinder pulse motor 153 in this range, a cylinder release position photo sensor 177 and a cylinder loading position photo sensor 17 are placed on the left main frame 181 at a predetermined angle.
On the other hand, a sensor dog 179 that acts on these photo sensors 177 and 178 is attached to the left eccentric shaft 1105, and when the impression cylinder pulse motor 153 reaches a rotational phase corresponding to the cylinder unloading position and the cylinder loading position. The system detects when the rotation phase corresponding to the position is reached.

Folding Machine Configuration A folding machine 17 is arranged at the front position of the printing press body 1 in order to fold and store the printed continuous paper 12 sent out from the paper conveyance system having the above-mentioned mechanism. There is. FIGS. 6A and 6B are explanatory views of the mechanism of an embodiment of the folding machine 17, and FIG. 6B is a perspective view thereof. The folding machine 17 according to this embodiment is configured so that it can always accurately fold and store the continuous paper 12 regardless of its vertical length.

A feed screw 1702 runs up and down inside a back box 1701 of the folding machine 7, and this feed screw 1702 is driven by a table lifting motor 1703 installed at the lowest part of the back box 1701. The feed screw 1702 has a pair of table support members 1706 and 1707 extending forward through two vertical openings 1704 and 1705 provided in parallel on the front panel of the rear box 1701.
A base 1708 is fitted and supported, and by moving the base 1708 in the vertical direction according to the rotation of the feed screw 1702, the base 1708 is placed on the support members 1706 and 1707 via the legs 1709. The continuous paper holder (paper table) 16 is configured to be raised and lowered to any desired position. A guide rod 1710 is provided to extend in parallel with the feed screw 1702 to ensure stability in lifting and lowering, and a slide member 1711 provided at the front central position of the base 1708 is fitted into this guide rod 1710.

In order to change the effective length of the continuous paper holder (paper table) 16 in the front-rear direction according to the vertical size of the continuous paper 12, a plurality of notches are provided at the front and rear ends of the paper table 16, and the notches are A front frame 1712 and a rear frame 1713, which are formed by vertically connecting a plurality of thin rods extending vertically through the frame, are slidable in the front-rear direction along the frame holding portion 1714.

Also, the continuous paper 1 stacked on the paper table 16
2, the folding machine 17
A pair of left and right support members 17 protrude forward from the rear body frame 17A across the paper stacking section.
The light emitting side and the light receiving side of the first and second paper surface detection photoelectric sensors 1717 and 1718 are arranged parallel to the table surface at the tips of the paper sheets 15 and 1716, respectively, so that the stacking height of the continuous paper 12 reaches a predetermined height. If it reaches that point, light will be blocked. The first and second paper surface detection photoelectric sensors 1717 and 1718 are arranged at the first and second paper surface detection photoelectric sensors 1717 and 1718, respectively, with the lower end of the paddle 15 as a reference.
During the folding operation, one of the photoelectric sensors 1717 and 1718 is selected depending on the vertical size of the continuous paper 12. Then, in response to the detection of light shielding, the table lift motor 1703 is driven to lower the paper table 16 by a minute distance so that the top surface height of the continuous paper 12 stacked on the paper table 16 is always maintained at the first or second predetermined level. Maintain the height and swing guide (paddle) described below
In combination with the control of the swing angle of the paper 15, it is possible to perform an appropriate folding operation according to the vertical size of the continuous paper 12.

For the purpose of regulating the lifting range of the paper table 16,
First and second table upper limit switches 1719 are installed at predetermined positions within the rear box 1701.
1720 and a table lower limit switch 1721 are provided, and an operating member 1729 for operating these limit switches is attached at a corresponding position on the base 1708. first and second table upper limit switches 1719;
Reference numerals 1720 correspond to the first and second paper surface detection photoelectric sensors 1717 and 1718, respectively, and are used when the paper table 16 comes to the first or second upper limit position with no paper on the paper table 16. The mounting position is set so that the top surface of the table is slightly below the detection position of the corresponding first or second paper surface detection photoelectric sensor 1717 or 1718.

The upper top plate 1722 of the folding machine 17 is installed to be tilted forward as shown in the figure so that the continuous paper 12 discharged from the printing press main body 1 slides down onto the paper table 16 along its upper surface. ing. A swing guide (paddle) 15 that can swing back and forth is arranged at the front end of the top plate 1722, and a paddle pulse motor 1 is installed in the space below the top plate 1722.
723 and paddle 1 via the timing belt 1725 and timing pulley 1724.
By rotationally driving the swing shaft 1726 of No. 5, the paddle 15 swings back and forth at a desired timing to fold the continuous paper 12 and move the paper table 16.
I try to stack them on top.

The swing angle of the paddle 15 is changed according to the vertical size of the continuous paper 12, but a standby position sensor 172 is used to know the standby position that is the reference for the swing range of the paddle.
7 is provided close to the paddle pulse motor 1723, and a sensor dog 1728 that acts on this standby position sensor 1727 is installed near the paddle pulse motor 1.
It is attached to the rotating shaft of 723.

Figures 6C and 6D show continuous paper 1, respectively.
FIG. 2 is an explanatory diagram showing setting examples of the swing angle of the paddle 15 and the upper limit position of the paper table 16 when the vertical size of No. 2 is long and short. As shown in FIG. 6C, when the vertical size of the continuous paper 12 is long,
The swing angle α of the paddle 15 is set large, and the upper limit position of the paper table 16 is selected to be the second upper limit position, so that the paper table 1
The distance to the top surface of the paper on page 6 is relatively large. Further, as shown in FIG. 6D, when the vertical size of the continuous paper 12 is short, the swing angle α of the paddle 15 is
is set relatively small, and the paper table 1
The first upper limit position is selected as the upper limit position of No. 6, and the distance from the lower end of the paddle 15 to the upper surface of the paper on the paper table 16 is kept relatively small. This results in
It becomes possible to perform an appropriate folding operation according to the vertical size of the continuous paper 12. Note that paper table 1
The number of paper surface detection photoelectric sensors and table upper limit switches that regulate the position of the paper sheet 6 may be increased depending on the vertical size range of the continuous paper sheet 12 to be used.

Initialization Next, paper feeding and paper receiving operations using the paper conveyance system and folding machine configured as described above will be explained. First, when the power is turned on, the microprocessor 21 executes an initialization sequence,
Each mechanism is reset to its initial position. In initializing the pin feed tractor 13, the microprocessor 21 controls the rotary encoder 19.
The DC servo motor 192 is rotated an appropriate number of times while referring to signals 6 and 197, and the paper conveying pin 131
1 to the initial position. Suction conveyor 14
At the initialization, the suction blower (not shown) starts to be energized, and the suction force switching solenoids 1418 and 1419 switch to the auxiliary shutter 1415.
Only the solenoid 1419 corresponding to is energized,
As a result, the suction conveyor 14 is transferred to the auxiliary shutter 14.
15 is opened and the suction force is set to "medium" and suction is started. The conveyor belt 1402 remains stationary.

FIG. 7 is a flowchart showing the operation of the microprocessor 21 when resetting the impression cylinder 11 to the cylinder release position. Referring to FIG. 5, first, in step S100, the impression cylinder shaft located at an arbitrary position is rotated by a sufficient amount in the cylinder loading direction, and the sensor dog 179
is ensured to be located closer to the body mounting side than the body detachment position photo sensor 177. To this end, the eccentric support shaft 1102 is rotated in the drum loading direction by the impression cylinder pulse motor 153, and the impression cylinder 11 is moved in the drum loading direction by, for example, about 10 pulses. This rotation angle in the direction of body loading is regulated by a stopper 175.The sensor dog 179, which is at the body detachment side stop position (in other words, the closest to the body body detachment side) is regulated by the body detachment position photo sensor 1.
It is set in advance so that it is rotated beyond 77 to the trunk side.

Next, in step S101, it is determined whether or not the body release position photosensor 177 has detected the body release position, and if it has not detected the body release position, the process advances to step S102.
Furthermore, the impression cylinder 11 is moved in the cylinder separation direction by one pulse. This operation continues until the body release position is detected, and once detected, the process advances to step S103. At this point, the cylinder separation position photo sensor 177 is operating, but in order to make the operation more reliable, the impression cylinder 11 is moved in the cylinder separation direction by one more pulse. With the above algorithm,
The impression cylinder 11 is always reset to a predetermined release position.

Also, at this time, since the impression cylinder pulse motor 153 has stopped at the correct step stop position, the subsequent operation of the impression cylinder pulse motor 153 is reliable, and thereafter the impression cylinder pulse motor 153 is controlled only by counting the drive pulses. The rotational phase of the motor 153, that is, the position of the impression cylinder 11 on and off the blanket cylinder 2 can be accurately known, making it easy to control the impression cylinder 11 on and off the blanket cylinder 2. For example, if the rotation of the impression cylinder pulse motor 153 is forcibly blocked by a rotation prevention mechanism such as a stopper and this position is set as the unloading position, the unloading position of the impression cylinder 11 is always reset to a constant position. The impression cylinder pulse motor 153 is not necessarily stopped at the correct step stop position (that is, it may be stopped in the middle between steps), and in such a case, the subsequent operation is uncertain. Therefore, it becomes difficult to accurately know the rotational phase of the impression cylinder pulse motor 153 only by counting the drive pulses. Therefore, from the viewpoint of facilitating the control of the impression cylinder 11 to unload and unload the blanket cylinder 2 with a simple configuration, the method of resetting the unloading position using the above-mentioned algorithm using the unloading position photo sensor 177 is effective. It's coming.

FIG. 8 is a flowchart showing the operation of the microprocessor 21 when resetting the paddle 15 to its original position. First, in step S104, it is determined whether or not the standby position sensor (origin position sensor) 1727 has detected the origin position. If it has not detected the origin position, the process advances to step S105, and the paddle pulse motor 1723 moves the paddle 15 for one pulse.
This operation of moving the paddle 15 backward is continued until the origin position is detected, at which point the initialization of the paddle 15 is completed.

Setting Continuous Paper Next, as a preparatory work for printing, the operator sets the continuous paper 12 on the pin feed tractor 13, and also records the vertical size information of the set continuous paper 12 and the mountain/valley folds at the edges of the paper.
Valley information is input using the operation panel 25. To set the continuous paper 12, the operator opens the paper holding covers 1312, 1313 of the left and right tractors, turns the lever 1306 in the loosening direction (clockwise direction) to unlock the right tractor unit 1302 on the moving side, and adjusts the paper to the paper width. While adjusting the width of the left and right tractors, engage the marginal punch of the continuous paper 12 with the paper conveyance pin 1311 of the left and right tractors so that the paper edge comes to the paper setting reference position, and then turn the lever 1306 in the tightening direction (counterclockwise direction). The right tractor unit 1302 on the moving side is locked, and the paper presser covers 1312 and 1313 are closed, and the setting of the continuous paper 12 is completed.

FIG. 9 is an explanatory diagram showing the paper edge set position of the continuous paper 12 in the pin feed tractor 13. As shown in the figure, the paper edge of the continuous paper 12 is always placed in the paper edge of the pin feed tractor 13 regardless of its vertical size. Set it to the set reference position according to _P1 . As mentioned above, the pin feed tractor 13 is installed in the printing press main body 1 in advance so that the paper setting reference position P ₁ is a predetermined distance H from the printing start position P ₂ . When the setting is completed, the paper end of the continuous paper 12 is located a distance H from the printing start position _P2 . Then, the continuous paper 12 set in this way
When the threading of the continuous paper 12 is completed, or when the continuous paper 12 is waiting for the next printing during printing, the fold or perforation of the continuous paper 12 (i.e., the beginning of the next page to be printed) starts printing. It comes to standby position _P3 , which is a run-up distance _H1 from position _P2 . In this way, P ₁ and P ₃ are the reference positions for paper setting and paper transport during printing, respectively, and must be detectable by the encoder, so the distance H ₂ between P ₁ and P ₃ is used. It is necessary to set it according to the characteristics of the encoder. For example, when using an encoder whose minimum unit of detection is 1/2 inch, H ₂ must be an integer multiple of 1/2 inch. And the required run-up distance for this H ₂
The mounting position of the pin feed tractor 13 is determined by adding _H1 to the predetermined distance H. Paper conveying pin 1 of pin feed tractor 13
311 adjusts the paper conveyance pin 1311 so that when the continuous paper 12 is set when detent (rotation prevention) is applied, the leading edge of the continuous paper 12 will be at the _P1 position.

Paper threading operation Once the continuous paper 12 is set on the pin feed tractor 13, the paper threading operation then begins. FIG. 10 is a flowchart showing the operation of the microprocessor 21 when executing the paper threading sequence. Paper threading is started by inputting the paper threading key of the operation panel 25. Upon inputting the key, it is first determined in step S106 whether or not a paper threading command can be accepted. For example, if the paper threading sequence cannot be executed, such as when the vertical size and peak/valley information of the continuous paper 12 has not been input, the process advances to step S107, an error is displayed on the operation panel 25, and the operation is performed. ends.

When a paper threading command can be accepted, step S106
The process then proceeds to step S108, where initial settings for each mechanical section are performed. This step S108 is for when the paper threading routine is entered from another routine such as cleaning the blanket body, and when the paper threading routine is executed immediately after the power is turned on, each part has already been activated in response to the power being turned on as described above. Since the initial settings have been made, nothing is done in step S108.

Next, in steps S109 and S110, the main motor 20 is started. There are two types of main motors 20, one for low speed and one for high speed. First, the low speed motor is turned on in step S109, and after a certain period of time, the low speed motor is turned off in step S110.
At the same time, the high-speed motor is turned on, and the starting of the main motor 20 is completed. As a result, the drive system by the main motor 20 starts operating, and the conveyor belt 1402 of the suction conveyor 14 starts conveying at a predetermined speed, and the blanket cylinder 2, the impression cylinder 11, the plate cylinders 3 and 4, and the inking unit 7,
The ink roller in 8 starts rotating at a predetermined speed. At this time, the impression cylinder 11 remains reset to the detached position with respect to the blanket cylinder.

Subsequently, in step S111, the DC servo motor 192 of the pin feed tractor 13 is driven at a low speed, and the pin feed tractor 13 starts feeding the paper at a low speed of, for example, 1/4 of the printing speed. Simultaneously with the start of paper feeding, the microprocessor 21 starts tracking the paper end position of the continuous paper 12 based on a built-in hard timer. And step S112
In this step, as will be described later, the end of the paper is set on the paper table 16 by moving the paddle 15 in accordance with the paper running, and then the process proceeds to step S113 where the drive of the DC servo motor 192 of the pin feed tractor 13 is stopped and the paper is continuously moved. The paper 12 is stopped and paper threading is completed.

FIG. 11 is an explanatory diagram when the continuous paper 12 is passed between the blanket cylinder 2 and the impression cylinder 11. The blanket body 2 is formed by closely winding a sheet member 203 on the side surface of a blanket cylinder 202 having an opening 201, and both ends of the sheet member 203 are provided with a large number of opening ends 204, 205 in the longitudinal direction. It is fixed by a set screw (not shown). The blanket cylinder 2 is driven by a main motor 20 and rotates at a constant rotation speed of, for example, 4500 rpm, and the impression cylinder 11 to be attached to the blanket cylinder 2 is driven by a gear meshing with the blanket cylinder 2 at one end of the cylinder. The blanket cylinder 2 and the impression cylinder 11 are rotated at a rotational speed corresponding to the ratio of cylinder diameters.

Now, the impression cylinder 11 has been reset to the release position with respect to the blanket cylinder 2 in response to the power being turned on. It progresses through the gap in between. During printing, the paper feed speed of the continuous paper 12 must be equal to the circumferential speed of the blanket cylinder 2 and the impression cylinder 11, but as described above, the paper feed speed of the continuous paper 12 during printing must be equal to Since the speed is set to a very low speed of 1/4, the continuous paper 12 is struck in the advancing direction by the blanket cylinder 2 and the impression cylinder 11 as it passes through the gap, and its rotation causes the suction conveyor 14 to move while contacting the impression cylinder 11 due to its own weight. sent in the direction.

If the paper is fed at a speed that is the same as or faster than the peripheral speed of the blanket cylinder 2, the trajectory of the paper edge and the phase of the blanket cylinder must be strictly controlled, otherwise the continuous paper 12 will fall into the opening 201 of the blanket cylinder 2. For example, if a paper ejecting roller 206 is provided to peel off the continuous paper 12 from the blanket cylinder 2 during printing, as shown by the imaginary line, the leading edge of the continuous paper 12 may fall into the paper ejecting roller 206. It is very important to make the paper feeding speed of the continuous paper 12 slower than the circumferential speed of the blanket cylinder 2 during paper threading. By doing so, it is possible to easily perform automatic paper threading without performing any difficult control and without crushing the paper edges of the continuous paper 12 even if the paper ejection roller 206 is provided. It becomes.

As described above, the blanket cylinder 2 and the impression cylinder 11 are
The continuous paper 12 that has passed through the gap between the two is guided toward the folding machine 17 by the suction conveyor 14. Conveyor belt 1 of suction conveyor 14
The conveyance speed of the continuous paper 12 is set in advance to an appropriate constant value that is faster than the paper feed speed of the continuous paper 12 during printing, and currently the paper feed speed of the continuous paper 12 is 1/4 of that during printing
Since the continuous paper 12 is at a low speed, the suction conveyor 1
4, it will be conveyed while being under tension. This tension changes depending on the suction force of the suction conveyor 14, but during paper threading, this tension is applied to the marginal punch of the continuous paper 12 engaged with the paper conveyance pin 1311 of the pin feed tractor 13, so the suction force is a "medium" stage that prevents the marginal punch from being damaged. That is, as described above, in the initialization sequence when the power is turned on, the main shutter 1 of the suction conveyor 14 is activated.
The suction is started with the shutter 414 in the "closed" state and the auxiliary shutter 1415 in the "open" state.

Setting the position of the paddle and paper table On the other hand, in response to the input of the paper threading key on the operation panel 25, the paddle 15 of the folding machine 17
And the paper table 16 is set in a predetermined position. FIG. 12 is a flow chart showing the operation of the microprocessor 21 when setting the paddle position, and FIG. 13 is an explanatory diagram schematically showing the set position and swing angle of the paddle 15. The swing angle α is changed according to the vertical size of the continuous paper 12, and the microprocessor 21 is controlled by the operation panel 25.
For example, a count value corresponding to the required swing angle α is set in a counter (not shown) based on the vertical size information inputted from the machine. The paddle 15 swings between a "front" position and a "rear" position centered on a position separated by a center angle β degree from the reset position. Then, in step S114, β-α/2 is calculated. This angle is paddle 1
This is the angle required to move the paddle from the reset position to the "rear" position.Next, in step S115, the paddle pulse motor 1723 is driven by the pulse amount corresponding to the angle calculated above to move the paddle to the "rear" position. When the paddle is moved to the initial position, the setting of the paddle position to the initial position is completed.

FIG. 14 is a flow chart showing the operation of the microprocessor 21 when setting the paper table 16 to the initial position. The upper limit position of the paper table 16 is changed according to the vertical size of the continuous paper 12, and the microprocessor 21 changes the upper limit position of two types (the first and a second table upper limit switch 1719,
(upper limit position corresponding to 1720) is selected in advance. For convenience of explanation, it is assumed that, for example, the first upper limit position corresponding to the first table upper limit switch 1719 has been selected. Then, when the paper threading key is inserted, the entire step
In S116, it is determined whether the output of the first table upper limit switch 1719 is ON, that is, whether the paper table 16 is at the upper limit position, and if it is at the upper limit position, the step
Proceed to S117 and the first paper surface detection photoelectric sensor 17
It is determined whether the output of 17 is ON, that is, whether there is any remaining paper from previous printing on the paper table 16. If there is no paper on the paper table 16, the output of the first paper surface detection photoelectric sensor 1717 is
It is OFF, and in that case, setting the table position is completed.

If there is paper on the paper table 16, the output of the first paper surface detection photoelectric sensor 1717 turns ON, so
Proceeding from step S117 to step S118, the table lifting motor 1703 is driven, and the paper table 1 is
6 by a predetermined height. While the table is lowering, it is monitored in step S119 whether the output of the table lower limit switch 1721 is turned ON, that is, whether the table has reached the lower limit position.
Proceeding to S120, the drive of the table lifting motor 1703 is stopped, the paper table 16 is stopped, and an error is displayed on the operation panel 25.

Also, while the table is lowering, the step
In S121, the first paper surface detection photoelectric sensor 171
The output of paper table 1 is monitored to see if it is ON, and if it is ON, the process returns to step S118 and paper table 1 is output.
6, and when it turns OFF, the process advances to step S122, where the paper table 16 is stopped and the setting of the table position is completed. As a result, the upper surface of the remaining paper on the paper table 16 is set at a predetermined height.

If the output of the table upper limit switch 1719 of the printer 2 is not ON in step S116, the paper table 16 has not reached the upper limit position, so the process proceeds to step S123, where a counter (not shown) is reset to 0, and then, in step S124, a counter (not shown) is reset to 0. The table lifting motor 1703 is driven to raise the paper table 16 by a predetermined height. While the table is rising, it is monitored in step S125 whether the output of the first table upper limit switch 1719 is turned ON, and if it is turned ON, the step is started.
Proceeding to S126, the paper table 16 is stopped, and then the operations from step S118 described above are performed.
At this time, if there is no paper remaining on the paper table 16, the
Since the output of the paper surface detection photoelectric sensor 1717 is OFF, the process immediately proceeds from step S121 to S122, and the paper table 16 stops. If there is any remaining paper on the paper table 16, the paper table 16 will stop after the upper surface of the remaining paper reaches a predetermined height by the above-described operation.

Also, while the table is rising, the step
In S127, the first paper surface detection photoelectric sensor 171
Monitor whether the output of 7 is ON, and if it is not ON, proceed to step S128 and set the counter to 0.
After resetting it, return to step S124 and raise the paper table 16, and when it turns ON, step
Proceeding to S129, the counter is incremented by 1, and then, in step S130, it is determined whether the count value of the counter is 2 or more. step
In S130, the first paper surface detection photoelectric sensor 17
It is determined whether the ON output of 17 is obtained continuously, and if the count value of the counter is 2 or more, the paper surface has been detected two or more times in a row, so there is no error in the detection. After determining that, the process advances to step S126 and the paper table 16 is stopped.
Then, the operations from step S118 described above are performed. As a result, the upper surface of the remaining paper on the paper table 16 is set at a predetermined height.

When the count value of the counter is 1 in step S130, for example, the remaining paper that has been threaded through the printing press body 1 is transferred from the paddle 15 to the paper table 16.
Since there is a possibility that the first paper surface detection photoelectric sensor 1717 may have detected the oblique part of the paper surface, the process returns to step S124, the paper table 16 is raised again, and the first paper surface detection photoelectric sensor 171 is detected again.
If the output of 7 is ON, proceed as described above.
The process proceeds to S126 and subsequent steps, and the upper surface of the remaining paper is set at a predetermined height.

Paper edge set As described above, operate the operation panel 2.
In response to the input of the paper threading key 5, the paddle 15 is set to the "rear" position, and the paper table 16 or the upper surface of the remaining paper on the paper table 16 is set at a predetermined height, and the pin feed tractor 13 is placed there. The continuous paper 12 is conveyed by the action of the suction conveyor 14. FIG. 15 is an explanatory diagram schematically showing how the paper edge is set when the leading edge of the continuous paper 12 reaches the folding machine 17, and a to d are illustrations when the leading edge of the paper is in a "valley" fold. , and e to h show the sheets when the leading edge of the paper is "mountain" folded.

As mentioned above, the microprocessor 21 tracks the paper edge position at the same time as paper feeding starts, and when the peak/trough information input from the operation panel 25 is a "trough", the paper edge is tracked by the folding machine. The paddle pulse motor 1723 is driven before reaching the initial position of the paddle and after the initial position setting of the paddle is completed.
Swing the paddle 15 up to the "forward" position. Then, the position shown in FIG. 15a (the top of the paper is at the paddle 15
The paddle 15 is moved to the "rear" position at the timing when the leading edge of the paper is conveyed to a position slightly before reaching the leading edge of the paper. At this time, the first page of the continuous paper 12 is "back"
Due to the action of the airflow generated on the back side of the paddle 15 as it is pulled into the position, it follows the paddle 15 and moves to the "rear" position. The width of the paddle 15 is preferably wider than the paper width of the continuous paper 12 in order to avoid the influence of wind pressure that tries to push the continuous paper 12 back to the "front" position at this time. Then, the state shown in figure b is reached. After that, continuous paper 1
The paddle 15 is sequentially swung between the "front" position and the "back" position at timings c and d when the paper 2 advances approximately one page at a time, and the paper edge setting is completed in the state shown in d.

When the top of the continuous paper 12 is folded into a "mountain" fold, the movement of the paddle 15 is opposite to that when the top of the continuous paper 12 is folded into a "valley" fold. That is, the microprocessor 21
Do not operate the paddle 15 until the timing shown in Figure e.
Leave it set in the "rear" position. Then, at the timing e, the paddle pulse motor 1723
to move the paddle 15 from the "rear" position to the "front" position.
move into position. Then, the state shown in figure f is reached. Thereafter, the paddle 15 is sequentially swung between the "rear" position and the "front" position at timings g and h when the continuous paper 12 advances approximately one page at a time, and the paper edge setting is completed in the state shown in h. .

FIG. 16 is a flow chart showing the operation of the microprocessor 21 when operating the paddle 15. This program is called and executed at an appropriate timing, and the timing reference may be, for example, a built-in hard timer or a reference rotary encoder (not shown) attached to the rotating shaft of the blanket body 2. It may be the output signal of When moving the paddle 15,
First, in step S131, it is determined whether the current paddle position is the "front" position or the "rear" position. This can be identified, for example, by flagging the "previous" position. When the position of the paddle 15 is "front", the process advances to step S132 and the paddle pulse motor 172 generates a pulse corresponding to the count value corresponding to the swing angle α set in the counter.
3 rearward to move paddle 15 to the "rear" position, then proceed to step S133 to move paddle 1
The operation ends with the position recording of No. 5 being set as "later".
When the current position of the paddle 15 is "rear", the process proceeds from step S131 to steps S134 and S135, and the same operation as described above for moving the paddle 15 forward is performed.

Printing When the paper threading is completed and the paper end of the continuous paper 12 is set in the folding machine 17 as described above, the low speed paper feeding stops (that is, the pin feed tractor 1
(The DC servo motor 192 of No. 3 is stopped), and the main motor 20 continues to rotate and waits for the next command. At this time, the leading portion (fold or perforation) of the first page of the continuous paper 12 to be printed is at the print standby position _P3 in FIG. 9.

When the print key on the operation panel 25 is turned on, the program proceeds to the printing program, where the routines of plate replacement, blanket cylinder cleaning, printing start, regular printing, and printing end are executed in sequence. Further, in response to the input of the print key, the paper presser fan 30 starts rotating. This paper presser fan 30
is configured to stop in response to the end of the printing program or in response to turning off the output of the paper presence/absence limit switch 1318 attached to the pin feed tractor 13.

In the plate exchange routine, the plate supply/discharge trays 9 and 1
The plates (not shown) prepared and placed in advance on the plate supply tray of No. 0 are wound around the corresponding plate cylinders 3 and 4 by the action of the corresponding plate supply and discharge units 5 and 6, and at the same time, the plates are loaded onto the corresponding plate cylinders 3 and 4. Supply/discharge plate trays 9, 1 to which old plates (not shown) wrapped around the cylinders 3, 4 correspond
The plate is discharged onto the plate discharge tray 0. In the case of one-color printing, the plate is discharged only on the necessary side.

In the blanket cylinder cleaning routine, the cleaning liquid is first supplied to the blanket cylinder 2 from the cleaning liquid supply unit 18 at an appropriate timing, then the cleaning liquid is intermittently supplied and at the same time the cleaning liquid is wiped off by the wiping unit 19, and finally the supply of the cleaning liquid is stopped. The cleaning of the blanket cylinder 2 is completed by simply wiping it.

Next, in the printing routine, the timing of inking between the ink rollers in the inking units 7, 8 and the plate cylinders 3, 4, and the timing of transfer from the plate cylinders 3, 4 to the blanket cylinder 2 are controlled appropriately. After actually printing about two sheets, adjusting the amount of ink on the plate cylinders 3 and 4 and the blanket cylinder 2, and bringing the printing density close to a steady value, the steady printing routine begins.

In the regular printing routine, the impression cylinder 11 is attached to and detached from the blanket cylinder 2 at an appropriate timing that matches the phase of the blanket cylinder 2, and the continuous paper 12 is intermittently fed at this timing so that one of the blanket cylinders 2 Each rotation prints one sheet at a time. The number of sheets to be printed is set in advance through the operation panel 25, and when the number of sheets printed reaches the set number, a print end routine similar to the above-described print start routine is executed to reduce the amount of ink on the blanket cylinder 2 to near zero. After the printing is finished and the plate discharge and blanket cylinder cleaning routines are executed, the rotation of the main motor 20 is stopped, the printing program is finished, and the next command is awaited.

FIG. 17 is a timing chart showing the operation of each mechanism when the continuous paper 12 is intermittently fed during regular printing. As the timing reference signal, an output signal from a reference rotary encoder (not shown) attached to the rotating shaft of the blanket cylinder 2 is used.
From this output signal, it is possible to know which phase the blanket cylinder 2 is currently in, as shown in FIG. 17f. “00” indicates that the top position of the blanket cylinder 2 is at the printing start position, and at this timing, the opening 201 of the blanket cylinder 2
The terminal end 205 (see FIG. 11) is at the position where the blanket cylinder 2 and the impression cylinder 11 are attached. 17th
The shaded area in FIG. is the effective circumference of the blanket cylinder.

The impression cylinder 11 is mounted at a timing from time t ₁ to time t ₂ . That is, as shown in FIG. 17a, the impression cylinder pulse motor 153 (FIG. 5C) is moved toward the loading cylinder side at timing _t1 , shortly after the starting end 204 of the opening 201 of the blanket cylinder 2 passes the printing start position. Driving is started, the driving is gradually accelerated, and the driving is gradually slowed down again, and the impression cylinder 11 is slowly seated over a relatively long period of time until time _t2 when the end 205 of the opening 201 approaches the printing start position. Move to body position.

At time _t2 when the impression cylinder 11 reaches the loading position, the opposing blanket cylinder 2 is in the opening phase, so the continuous paper 12 is not nipped between the blanket cylinder 2 and the impression cylinder 11. The nip of the continuous paper 12 is located at the end 205 of the opening 201 (see FIG. 11).
This is performed for the first time when it reaches the print start position (that is, at the timing of "00"), and printing starts from this point.

When the impression cylinder 11 is loaded (timing _t2 ), the DC servo motor 192 of the pin feed tractor 13 is in a non-driving state as shown in FIG. 17b, and the pin feed tractor 13 remains stopped. The continuous paper 12 is in a printing standby state. Note that a detent (rotation prevention) is applied to the pin feed tractor 13 at timing _t8 . At this time, the suction switching solenoid 141 of the suction conveyor 14
8, 1419 is in the initial state where only the auxiliary shutter solenoid 1419 is energized, as shown in c and d, so the main shutter 1414 is "closed".
The auxiliary shutter 1415 is in the "open" state, and the suction force of the suction conveyor 14 is in the "medium" stage as shown in e. Since the conveyor belt 1402 on the suction conveyor 14 is driven by the main motor 20 and runs at a constant speed in the paper discharge direction, the continuous paper 12
is a pin feed tractor 13 and a suction conveyor 14
Appropriate tension is applied between the two. The suction force in the "medium" stage during printing standby is preferably one that can provide as much tension as possible without tearing the marginal punch of the continuous paper 12 engaged with the paper conveyance pin 1311 of the pin feed tractor 13. Select it.

Timing t ₃ just before “00” when printing starts
At this point, the day tent of the pin feed tractor 13 is released as shown in b, and the DC servo motor 1 is
92 starts to be driven in the normal rotation direction. At the same time, as shown in d, the auxiliary shutter solenoid 1
419 is turned off, the auxiliary shutter 1415 is placed in the "closed" state, and the suction conveyor 1 is turned off as shown in e.
Set the suction power of step 4 to "large". As a result, paper feeding of the continuous paper 12 is started while applying a very strong tension, and the feeding speed of the leading edge of the first page to be printed starting from the printing standby position P ₃ in FIG. 9 is equal to the printing start position P ₂ ( A moment before the timing "00"), it reaches v, which is the same as the circumferential speed of the blanket cylinder 2. And a moment later, at the timing of “00”, 1
The leading edge of the page reaches the printing start position _P2 and is nipped between the blanket cylinder 2 and the impression cylinder 11,
The predetermined printing section (that is, corresponding to the vertical length of one page) ends from the timing of this "00" t ₄
1 of the continuous paper 12 until the timing of
Printing occurs on the page.

During printing, as mentioned above, a very strong tension is applied to the continuous paper 12 by the suction force in the "large" stage, so the continuous paper 12 stuck to the blanket cylinder 2 due to the viscosity of the ink can be easily removed. It can be torn off. Therefore, it is not necessary to provide a paper ejecting roller 206 as shown by the imaginary line in FIG. 11, which is particularly effective when it is desired to print across the entire width of the continuous paper 12.

At the timing of _t4 when the printing section ends,
As shown in a, the impression cylinder pulse motor 153 is started to be driven toward the cylinder separation side. At this time, the drive is quickly started up and lowered in a relatively short period of time, unlike when the body is loaded, and quick detachment is achieved. Then, at timing _t5 when the impression cylinder 11 returns to the cylinder release position, the DC of the pin feed tractor 13 is adjusted as shown in b.
The forward rotation brake starts to be applied to the servo motor 192. At this time, as shown in c and d, both the main shutter solenoid 1418 and the auxiliary shutter solenoid 1419 of the suction conveyor 14 are energized,
Main shutter 1414 and auxiliary shutter 1415
Both are set to the "open" state, and the suction force is lowered to the "low" stage as shown in e to minimize the tension applied to the continuous paper 12.

Thereafter, at timing t ₆ when the feed speed of the pin feed tractor 13 reached zero, the DC servo motor 192 was started to be driven in the reverse direction, and at timing t ₇ , the reverse brake was started to be applied, and the reverse speed reached zero. At the timing of _t8 , the reverse drive is stopped and the day tent is applied at the same time. At timing _t8 when the reversal is completed, the head of the second page of the continuous paper 12 is at the print standby position _P3 in FIG. 9.
In other words, by reversing the timing between t ₆ and t ₈ ,
The continuous paper 12 is moved by a distance corresponding to the run-up (timing _t3 to 00) and overrun (timing _t4 to _t6 ).
It is pulling back.

During reverse feeding, the suction force of the suction conveyor 14 is set to the "low" stage so as not to apply an excessive load to the marginal punch of the continuous paper 12 engaged with the paper conveyance pin 1311 of the pin feed tractor 13. This action prevents the continuous paper 12 from floating up from the upper surface of the suction conveyor 14. Then, at timing _t8 when paper feeding is completed, the main shutter solenoid 1418 is activated as shown in FIG. 17c.
The main shutter 1414 is closed by stopping power supply to the main shutter 1414, and the suction force is set to the "medium" stage as shown in e, and the printer enters a standby state for printing the next page.

Sequential Lowering of Paper Table The continuous paper 12 printed intermittently as described above and discharged from the printing press body 1 is sequentially folded and stored in the folding machine 17. The microprocessor 21 rotates the paddle as shown in FIG. 16 every time an origin pulse (set at the start of normal rotation of the tractor) is output from a reference rotary encoder (not shown) attached to the rotating shaft of the blanket body 2. Execute the program and print one sheet of continuous paper each time one page is printed.
Swing angle α according to the vertical size of 2 (see Figure 13)
to swing the paddle 15 alternately between the "front" and "rear" positions. The operation at this time is similar to that in the paper threading described above.

The paper table 16 gradually descends as the continuous paper 12 is stacked up. FIG. 18 shows the microprocessor 2 when lowering the paper table 16.
The microprocessor 21 executes this program every time the origin pulse is output from the reference rotary encoder of the blanket cylinder 2. The paper top surface height is selected according to the vertical size information as described above in connection with paper threading, and here, as in the case described above, the paper top surface height corresponding to the first paper surface detection photoelectric sensor 1717 is selected. The case where it is selected will be explained.

First, in step S136, it is determined whether the output of the first paper surface detection photoelectric sensor 1717 is ON, that is, whether the top surface of the paper has reached a predetermined height. If not, step
The process advances to S137, where a counter (not shown) is reset to zero, and the operation ends. If the top surface of the paper has reached a predetermined height, the first paper surface detection photoelectric sensor 17
The output of No. 17 is turned on, and the process advances from step S136 to step S138, where the counter is incremented by one. Next, in step S139, it is determined whether the count value of the counter is 5 or more, that is, 5.
The first paper surface detection photoelectric sensor 171
Determine whether the output of 7 is ON. By requiring multiple detections in this manner, it is possible to avoid malfunctions when the first paper surface detection photoelectric sensor 1717 detects an oblique portion of the continuous paper 12 suspended from the paddle 15. In other words, since the oblique portion of the continuous paper 12 is always swinging from side to side, it will not be detected more than five times in a row.

If the count value of the counter is 5 or more, the height of the top surface of the paper on the paper table 16 has reached the predetermined height, so the steps start from step S139.
Proceeding to S140, the table lift motor 1703 is driven in the downward direction for a certain period of time, and the paper table 16 is lowered by a predetermined distance (for example, 5 mm). After the counter is reset to zero in step S141, the operation ends. If the count value is less than 5, the operation ends without lowering the paper table 16, but the counter is not reset at this time, and if the count value becomes 5 or more in subsequent executions of this program, At that point, the paper table 16 will be lowered. In this way, the height of the top surface of the continuous paper 12 is always maintained in accordance with the vertical size of the continuous paper 12.

In the above description, the method for resetting the cylinder of a printing press according to the present invention has been described in detail for an embodiment in which the method for resetting the cylinder of a printing press is applied to resetting the release position of the impression cylinder. It can also be applied to reset, and in this case as well, the same effects as in the above embodiment can be achieved.

(Effects of the Invention) As explained above, the method for resetting the printing pressure control device according to the present invention is as follows: The distance between the shafts of the first cylinder and the second cylinder can be freely set by rotating a pulse motor connected to the shaft, and the pulse motor corresponds to the reset position of the first cylinder. A reset position sensor is disposed on the rotational phase angle of the pulse motor, and a sensor dog is provided which rotates while following the rotation of the pulse motor and acts on the reset position sensor. direction), then rotate it in the direction of the reset position sensor (in the opposite direction), and stop the pulse motor electrically when the reset position sensor operates, thereby ensuring that the pulse motor stops in the middle of its steps. This position is set as the reset position. As a result, the pulse motor is reliably reset at the step of the predetermined position, and from then on, it is possible to accurately control the position of the cylinder only by counting the drive pulses, ensuring printing pressure control by the printing pressure control device. can be done.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of a multicolor offset printing machine, Fig. 2 is a schematic block diagram of the control system, Figs. 3A to 3E are mechanical illustrations of the pin feed tractor, and Figs. 4A to 4G are suction Figures 5A to 5D are explanatory diagrams of the conveyor mechanism. Figures 6A to 6D are explanatory diagrams of the mechanism of the folding machine. Figure 7 is when resetting the impression cylinder. 8 is a flowchart showing the operation when resetting the paddle, FIG. 9 is an explanatory diagram of the paper edge setting position, FIG. 10 is a flowchart showing the paper threading operation, and FIG. 11 is a flowchart showing the operation when resetting the paddle. Explanatory diagram when passing paper through the gap between the blanket cylinder and the impression cylinder, 1st
Figure 2 is a flowchart showing the operation when setting the paddle position, Figure 13 is an explanatory diagram schematically showing the set position and swing angle of the paddle, and Figure 14 is a flowchart showing the operation when setting the paper table to the initial position. FIG. 15 is an explanatory diagram schematically showing how the paper edge is set, FIG. 16 is a flowchart during the paddle swinging operation, and FIG. 17 is a timing chart showing the intermittent feeding operation of continuous paper. FIG. 18 is a flowchart showing the sequential lowering operation of the paper table. 2... Blanket cylinder, 11... Impression cylinder, 152
... Helical coupling, 153 ... Impression cylinder pulse motor, 177 ... Body separation position photo sensor, 17
8...Body position photo sensor, 179...Sensor dog, 1102...Spindle, 1104, 1105...
Eccentric axis.

Claims (1)

[Scope of Claims] 1. A method for resetting a printing pressure control device that controls printing pressure between a first cylinder and a second cylinder, wherein the printing pressure control device is configured such that the first cylinder rotates. an eccentric shaft that is freely fitted and inserted; and a first rotor that is connected to the eccentric shaft to rotate the eccentric shaft by a desired angle, and according to the rotation angle of the eccentric shaft.
a pulse motor that changes the distance between the axes between the first cylinder and the second cylinder; a reset position sensor disposed at a rotational phase angle of the pulse motor that corresponds to the reset position of the first cylinder; , a sensor dog that rotates while following the rotation of the pulse motor and acts on the reset position sensor, and after rotating the pulse motor in one direction for a predetermined number of counts, subsequently rotates the pulse motor in the opposite direction to the one direction. 1. A method for resetting a printing pressure control device, characterized in that the reset position sensor is rotated to a position where it is operated by the sensor dog, and that position is set as a reset position.