JPH0427149B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a folding machine that swings continuous paper using a swing guide, folds it alternately, and sequentially stacks it on a paper table. The present invention relates to a method for sequentially lowering the paper table according to the amount of stacked continuous paper so that the top surface height of the continuous paper stacked on the paper is always maintained at a predetermined height.

(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 it takes a lot of time to switch and adjust printing patterns, and a large amount of paper is wasted during the adjustment.
Various simple offset form printing machines have been developed for printing small lots of business forms. When folded continuous paper is used in such a form printing machine, a folding machine is generally placed on the exit side of the printing machine to fold and store the printed continuous paper. For example, while the continuous paper is swung by a double-sided swinging guide with a narrow gap through which the continuous paper is inserted, its folds are alternately received by two spiral guides, and guided downward as the spiral guides rotate. There is a folding machine that folds the paper by hand, but since the swing guide is a double-sided clamping type, it cannot be folded until the printed surface is dry, and it is difficult to align the phases of the two spiral guides. , the folds are damaged when guided downward by the spiral guide, it is difficult to match the folding timing when the spiral guide width is changed in response to changes in the vertical size of the continuous paper, the equipment becomes large, etc. There are drawbacks. As the simplest folding machine that eliminates these drawbacks, we propose a method in which the continuous paper is alternately folded on a paper receiving table while swinging the continuous paper at an appropriate swing angle using a single-sided swing guide. However, proper folding operation cannot be achieved unless the mutual distance relationship between the upper surface position of the continuous paper on the paper receiving table and the lower end position of the swing guide is maintained accurately in conjunction with the selection of the swing angle. Can not. To do this, it is necessary to lower the paper table successively as the continuous paper is loaded to maintain the top surface height of the continuous paper on the paper table at a predetermined height, but conventional folding machines There is no one that accurately realizes such an operation with a simple configuration.

(Objective of the Invention) Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, to lower the paper table sequentially according to the loaded amount of continuous paper, and to provide a simple structure in which the continuous paper on the paper table is To provide a method for successively lowering a paper table that can always accurately maintain the height of the top surface of paper at a predetermined height.

(Means for achieving the object) In order to achieve the above object, according to the present invention,
The folded continuous paper that is fed along the supply path in the unfolded state is dropped onto the paper table while being swung by the swinging motion of the swing guide at a predetermined timing, and is folded alternately according to the folding direction. In the method, the paper table is sequentially lowered according to the amount of loaded continuous paper so that the top surface height of the stacked continuous paper is always maintained at a predetermined height. The guide is a paddle having a swinging shaft extending in the width direction of the continuous paper on the lower surface side of the continuous paper supply path, and a pair of photoelectric detectors on the light emitting side and the light receiving side for detecting the height of the upper surface, The optical axis is parallel to the table surface of the paper table, and faces at a predetermined height across the hoistway of the paper table so that it faces in the width direction of the continuous paper at the center of the vertical size of the continuous paper to be folded. The continuous paper is pushed out by swinging the paddle toward the continuous paper side, and the continuous paper is pulled in by the action of airflow generated by swinging the paddle in the opposite direction to the continuous paper side. Then, the continuous paper is dropped onto the paper table while swinging, and the photoelectric detector detects the height of the top surface of the continuous paper that is sequentially stacked on the paper table while being folded, and the detection output of the photoelectric detector is detected. The paper table is lowered by a predetermined height when this continues for a predetermined time or more.

(Embodiment) General Structure FIG. 1 shows a schematic cross-sectional view of a multicolor offset printing machine capable of printing continuous paper to which the paper table sequential lowering 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 applying ink are removably installed, respectively.
In addition, each plate supply/discharge unit 5, 6 has a plate supply/discharge tray 9,
10 is detachably attached.

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.

Also, 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, and an operating spring 1319 for operating this paper present/presence limit switch 1318 is attached to the paper receiving guide plate 131.
When the continuous paper 12 is set, an operating spring 1319 is pushed down and a paper presence/absence limit switch 1318 is activated to detect 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
The phase combination 311 has already been performed when fixing the left and right tractor units 1301, 1302 to the linear bearing movers 1303, 1304, respectively, and the
03 and 1304 only move in parallel in the left and right direction on the guide rail 1305, so the above parallel relationship and phase relationship after adjustment will be the same as the guide rail 1.
305 is not damaged until it is attached to the left and right brackets 182, 183. Therefore, 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 direction of rotation, and the conveyor belt 1402 keeps its conveying surface approximately horizontal and runs diagonally between the blanket cylinder 2 and the impression cylinder 11. The left and right main frames 180, 181 of the printing press body 1 are arranged so as to horizontally guide the advancing continuous paper 12 in the forward discharge direction.
It is positioned and fixed between (see Fig. 4C). 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 slits 1403. With such a configuration, the blanket cylinder 2 and the impression cylinder 1
While sucking the continuous paper 12 sent from the folding machine 1 to the upper surface of the conveyor 1402, the folding machine 1 in front
It will lead you in the direction of number 7.

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 right 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 is set up 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. 5 is an explanatory diagram of a separation cylinder mechanism for the impression cylinder 11 with respect to the blanket cylinder 2. As shown in FIG. As shown in the figure, the impression cylinder 11 is connected to a support shaft 1102 via a bearing 1101.
As described above, the impression cylinder 11 is driven by one end of the blanket cylinder 2 driven by the main motor 20 through the gear 1103 disposed at one end of the impression cylinder 11. This is done by meshing with the gear 201 of the section. That is, impression cylinder 1
1 is always driven to rotate regardless of the state of the take-off cylinder. The support shaft 1102 is supported by eccentric bearings 1104 at both ends of the impression cylinder 11,
By rotating this support shaft 1102 at a predetermined angle by an impression cylinder pulse motor (not shown), the impression cylinder 11
The loading and unloading of the blanket cylinder 2 is performed. Further, in order to know the release position of the impression cylinder 11, a release position sensor (not shown) is provided.

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. be. 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 17, 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, 170 extending forward through two vertical openings 1704, 1705 provided in parallel on the front panel of the rear box 1701.
7 is fitted and supported, and by moving this base 1708 in the vertical direction according to the rotation of the feed screw 1702, the leg 1709
The continuous paper holder (paper table) 16 placed on the support members 1706 and 1707 is raised and lowered to an arbitrary position via the support members 1706 and 1707. A guide rod 1710 is installed in parallel with the feed screw 1702 to ensure stability in lifting and lowering.
A slide member 1711 provided at the front central position of the base portion 1708 is fitted into the base portion 1708.

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
First and second paper surface detection photoelectric sensors 17 are installed at the ends of a pair of left and right support members 1715 and 1716, respectively, which protrude forward from the rear main body frame 17A across the hoistway of the paper stacking section, that is, the paper table 16.
A pair of light emitting side and light receiving side of 17,1718,
The optical axes are parallel to the table surface and are arranged facing each other so that they face in the width direction of the continuous paper 12 at the center position of the vertical size of the continuous paper 12 to be folded, and the stacking height of the continuous paper 12 is When the height reaches a predetermined height, light is 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. It constitutes a supply path for supplying the continuous paper 12 onto the paper table 16. 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 1723 is arranged in the lower space of the top plate 1722, and a timing pulley 1724 and a timing belt 1725 are arranged.
By rotationally driving the swing shaft 1726 of the paddle 15 via the paddle 15, the paddle 15 is moved back and forth at a desired timing to fold the continuous paper 12 and stack it on the paper table 16. .

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 set to 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 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. First, in step S100, the impression cylinder shaft located at an arbitrary position is rotated by a sufficient amount in the cylinder loading direction. For this purpose, a support shaft 1102 supported by an eccentric bearing portion 1104 is rotated by an impression cylinder pulse motor (not shown), and the impression cylinder is moved in the drum loading direction by about 10 pulses. Next, in step S101, it is determined whether or not the cylinder separation position sensor (not shown) has detected the cylinder separation position. If it has not detected the cylinder separation position, the process proceeds to step S102, in which the impression cylinder is moved by one pulse.
Move in the direction of releasing the body. 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 detection sensor is operating, but in order to ensure more reliable operation, the impression cylinder 11 is moved in the cylinder separation direction by one more pulse. By the above algorithm, the unloading position of the impression cylinder 11 is always reset to a constant position with respect to the unloading position sensor.

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 backward by one pulse. This operation of moving the paddle 15 to the original position is continued until the origin position is detected, and when the origin position is detected, 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 top-to-bottom size information of the set continuous paper 12 and the mountain and valley folds representing the mountain and valley folds at the edge of the paper. Valley information is input using the operation panel 25. To set the continuous paper 12, the operator opens the paper presser covers 1312, 1313 of the left and right tractors and turns the lever 1306 in the relaxing direction (clockwise direction) to release the moving tractor unit 130.
2, 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 is at the paper setting reference position while adjusting the width of the left and right tractors according to the paper width, and then release the lever. Rotate in the tightening direction (counterclockwise) to lock the movable tractor unit 1302 and close the paper presser covers 1312 and 1313 to remove the continuous paper 12.
The setting of 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 _P1 .
As mentioned above, the pin feed tractor 13
Since the paper setting reference position P ₁ is pre-positioned and installed in the printing press main body 1 so that it is a predetermined distance H away from the printing start point P ₂ , when the paper setting is completed, the paper of the continuous paper 12 is The edge is the printing start point
It exists at a distance H in front of P ₂ . When the threading of the continuous paper 12 set in this way is completed, or when the continuous paper 12 is waiting for the next printing during printing, the folds or perforations of the continuous paper 12 (that is, the next The beginning of the page to be printed) comes to the standby position _P3 , which is a run-up distance _H1 from the printing start point _P2 .
In this way, P ₁ and P ₃ are the reference positions for paper setting and paper transport during printing, and must be detectable by the encoder.
The distance H ₂ between P ₁ and P ₃ needs to be set according to the characteristics of the encoder used. 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. Then, the mounting position of the pin feed tractor 13 is determined by adding the required run-up distance H ₁ to this H ₂ as the predetermined distance H. The paper conveyance pin 1311 of the pin feed tractor 13 is adjusted so that when the continuous paper 12 is set when the 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 when the paper threading key of the operation panel 25 is turned on, and when the key is turned on, 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 the paper threading command can be accepted, step S10
6, the process advances to step S108, and initial settings for each mechanical section are performed. This step S108 is for the case where the transition from another routine such as blanket body cleaning to paper threading is performed.
When performing paper threading immediately after turning on the power, the initial settings of each part have already been made in response to turning on the power as described above, so this step S108
Then you will do nothing.

Next, in steps S109 and S110, the main motor 20 is started. This main motor 20 is provided with two types, one for low speed and one for high speed.
First, in step S109, the low-speed motor is turned on,
After a certain period of time has elapsed, the low speed motor is turned off and the high speed motor is turned on at step S110, 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 to be conveyed at a predetermined speed, and the blanket cylinder 2, impression cylinder 11, plate cylinders 3 and 4, and ink rollers in the inking units 7 and 8 start 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 S1
In step S12, as will be described later, the end of the paper is set on the paper table 16 by moving the paddle 15 as the paper travels, 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. The continuous 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 the paper feed speed of the continuous paper 12 is currently 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
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 flowchart 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 necessary 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 spaced from the reset position by a center angle β degree, and the microprocessor 21 is configured to perform a swinging motion between a "front" position and a "rear" position, with the center located at a center angle β degrees away from the reset position. Then, in step S114, β-α/2 is calculated. This angle is the angle required to move the paddle 15 from the reset position to the "rear" position, followed by step S11.
In Step 5, the paddle pulse motor 1723 is driven by a pulse corresponding to the angle calculated above to move the paddle to the "rear" position, and 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. When the paper threading key is turned on, first, in step 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. If so, the process advances to step S117 and the first paper surface detection photoelectric sensor 1
It is determined whether the output of 717 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 OFF, and in that case, setting of 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
The process advances from step S117 to step S118, where the table lifting motor 1703 is driven to lower the paper table 16 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.
703 is stopped, the paper table 16 is stopped, and an error is displayed on the operation panel 25.

Also, while the table is lowering, step S1
21, the first paper surface detection photoelectric sensor 1717
monitors whether the output of
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, paper table 1
The upper surface of the remaining paper on 6 is set at a predetermined height.

If the output of the first table upper limit switch 1719 is not ON in step S116, the paper table 16 has not reached the upper limit position, so the process advances to step S123 to reset a counter (not shown) to 0, and then to step S124.
At this point, the table lifting motor 1703 is driven to raise the paper table 16 by a predetermined height. While the table is rising, the output of the first table upper limit switch 1719 is
It is monitored to see if it is turned on, and if it is turned on, the process advances to step S126 to stop the paper table 16, 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 output of the first paper surface detection photoelectric sensor 1717 is OFF, so 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, step S1
27, the first paper surface detection photoelectric sensor 1717
monitors whether the output is ON, and if not, proceeds to step S128 and turns the counter
After resetting, the process returns to step S124 to raise the paper table 16, and when it turns ON, the process proceeds to step S129, where 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. determine whether In step S130, it is determined whether the ON output of the first paper surface detection photoelectric sensor 1717 is obtained continuously. If the count value of the counter is 2 or more, the paper surface is detected two or more times in succession. Since it is detected, it is determined that there is no error in the detection,
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 paper table 1 is moved from the paddle 15 of the remaining paper that has been threaded through the printing press main body 1.
Since there is a possibility that the first paper surface detection photoelectric sensor 1717 may have detected the oblique portion from 6 to 6, the process returns to step S124, the paper table 16 is raised again, and the first paper surface detection photoelectric sensor 1717 is detected again.
If the output of 717 is ON, the process proceeds to step S126 and subsequent steps as described above, 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 show the state when the leading edge of the paper is in a "valley" fold. ee 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 surface of the paddle 15 as it is pulled into the position, the paddle 15 is retracted and moved to the "rear" position following the paddle 15. 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, the continuous paper 12 advances approximately one page at a time c, d
The paddle 15 is sequentially swung between the "front" position and the "rear" position at the timing d, 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, by pushing out the paddle 15, the continuous paper 12 is brought into the state shown in Fig. f. Thereafter, at timings g and h when the continuous paper 12 advances approximately one page at a time, the paddle 15 is sequentially moved to the "back" position and the "front" position.
The paper end 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, where the paddle pulse motor 1723 is driven backward by the pulse amount corresponding to the count value corresponding to the swing angle α set in the counter, and the paddle 15 is moved backward. is moved to the "rear" position, and then the process proceeds to step S133, where the position of the paddle 15 is recorded as "rear", and the operation ends. When the current position of the paddle 15 is "rear", steps S131 to S13 are performed.
4. Proceed to S135 and perform the same operation as described above for moving the paddle 15 forward.

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, paper feeding is stopped (that is, the pin feed tractor 13 is turned off).
The DC servo motor 192 stops), 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, at timing _t1 shortly after the starting end 204 of the opening 201 of the blanket cylinder 2 passes the printing start position, the impression cylinder pulse motor (not shown) is started to be driven toward the loading cylinder side. The drive is gradually increased, and then the drive is gradually loosened again, and the impression cylinder 11 is slowly moved to the drum loading position over a relatively long period of time until time _t2 when the terminal end 205 of the opening 201 approaches the printing start position. let

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. The conveyor belt 1402 of the suction conveyor 14 is driven by the main motor 20 and runs at a constant speed in the paper discharge direction, so that 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 is started to be driven toward the cylinder removal 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 normal rotation brake is started to be applied to the DC servo motor 192 of the pin feed tractor 13 as shown in b. 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, and the main shutter 1414 and the auxiliary shutter 1415 are both in the "open" state, as shown in e. Set the suction power to "Small"
The tension applied to the continuous paper 12 is kept to a minimum.

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 S
The process advances to step 137, where a counter (not shown) is reset to zero, and the operation ends. If the top surface of the paper reaches a predetermined height, the first paper surface detection photoelectric sensor 1
The output of 717 turns ON and the process advances from step S136 to step S138, where the counter is incremented by one. Subsequently, in step S139,
Whether the count value of the counter is 5 or more,
That is, it is determined whether the output of the first paper surface detection photoelectric sensor 1717 has been turned on five or more times in a row. By setting multiple detection conditions as described above, the oblique portion of the continuous paper 12 suspended from the paddle 15 can be detected by the first paper surface detection photoelectric sensor 17.
17 is detected, it is possible to avoid malfunction. 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 upper surface of the paper on the paper table 16 has reached the predetermined height, so the process proceeds from step S139 to step S140, and the table lift motor 1703
is driven in the downward direction for a predetermined 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. Furthermore, the height of the top surface of the paper is detected by the paper surface detection photoelectric sensor 1717.
Since this method detects at the center position of the vertical size of 2 and parallel to the table surface toward the width direction of the continuous paper 12, the detection position is the continuous paper 12 that is folded.
This is the farthest position from the folds on both sides of continuous paper 1.
2, and erroneous detection due to the lifting can be effectively prevented, and a single paper surface detection photoelectric sensor 1717 with a pair on the light emitting side and the light receiving side can exhibit a good detection function. moreover,
Continuous paper 1
Continuous paper 12 is made by pushing out and pulling in 2.
This is a method in which the continuous paper 12 is dropped onto the paper table 16 while being oscillated, so that the continuous paper 12 does not fluctuate as much when stacked on the paper table 16, and is stably stacked on the paper table 16. , detection by the paper surface detection photoelectric sensor 1717 is performed satisfactorily.

In the above description, the paper table sequential lowering method according to the present invention is applied in detail to an offset form printing machine, but the present invention is applicable not only to form printing machines but also to machines that process folded continuous paper in general. It can be widely applied, and in this case as well, the same effects as in the above-mentioned embodiments can be achieved.

(Effects of the Invention) As described above, according to the present invention, when folded continuous paper is sequentially stacked on a paper table, the swinging support shaft extends in the width direction of the continuous paper on the lower surface side of the continuous paper supply path. Continuous paper is pushed out by swinging the paddle in the direction opposite to the continuous paper side, and continuous paper is pulled in by the action of airflow generated by swinging the paddle in the opposite direction to the continuous paper side. Since the paper is dropped onto the paper table while swinging, and the continuous paper is folded and sequentially stacked on the paper table, there is less flapping of the continuous paper when it is stacked on the paper table, and the paper table is folded. It can be stably loaded on top. In addition, a pair of photoelectric detectors, the light emitting side and the light receiving side, detecting the height of the top surface of the continuous paper stacked on the paper table, has its optical axis parallel to the table surface of the paper table, and when folded. These photoelectric detectors are placed facing each other at a predetermined height across the hoistway of the paper table so as to face the width direction of the continuous paper at the center of the vertical size of the continuous paper being loaded. Since this method detects the height of the top surface, the detection position is the farthest position from the folds on both sides of the continuous paper being folded, so there is less lifting of the continuous paper.
Erroneous detection due to floating can be effectively prevented, the paper can be stably stacked on the paper table mentioned above, and a single photoelectric detector with a pair on the light emitting side and the light receiving side allows for good detection. Function can be demonstrated and the structure can be simplified. Here, when the detection output of this photoelectric detector continues for a predetermined time or more, the paper table is lowered by a predetermined height, so the structure is simple and the paper table is lowered sequentially according to the amount of paper loaded. , it becomes possible to realize a paper table sequential lowering method that can always accurately maintain the top surface height of the paper on the paper table at a predetermined height.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view of a multi-color offset printing machine, Fig. 2 is a schematic block diagram of the control system, Figs. 3A to 3E are mechanical explanatory views of the pin feed tractor 13, and Figs. 4A to 4G are Fig. 5 is an explanatory diagram of the mechanism of the suction conveyor, Fig. 5 is an explanatory diagram of the impression cylinder loading/unloading cylinder mechanism, Figs. 6A to 6D are explanatory diagrams of the mechanism of the folding machine, and Fig. 7 is an illustration of the operation 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 of the blanket cylinder and 12 is a flowchart showing the operation when setting the paddle position; FIG. 13 is an explanatory drawing schematically showing the paddle setting position and swing angle; FIG. The figure 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. The figure is a timing chart showing the intermittent feeding operation of continuous paper, and FIG. 18 is a flow chart showing the sequential lowering operation of the paper table. 15... swing guide, 16... paper table, 17...
Folding machine, 1702... Feed screw, 1703... Table lifting/lowering motor, 1717... First paper surface detection photoelectric sensor, 1718... Second paper surface detection photoelectric sensor.

Claims (1)

[Claims] 1. A folded continuous paper fed along a supply path in an unfolded state is caused to fall onto a paper table while being swung by the swinging motion of a swinging guide at a predetermined timing, and the folding direction is determined. The paper table is sequentially stacked in accordance with the loaded amount of the continuous paper so that the top surface height of the stacked continuous paper is always maintained at a predetermined height. In the lowering method, the swinging guide is a paddle having a swinging shaft extending in the width direction of the continuous paper on the lower side of the continuous paper supply path, and the light emitting side and the light receiving side of the photoelectric detector that detects the height of the upper surface are connected to each other. A pair of side panels are placed across the hoistway of the paper table so that their optical axes are parallel to the table surface of the paper table and point in the width direction of the continuous paper at the center of the vertical size of the continuous paper to be folded. The continuous paper is pushed out by swinging the paddle toward the continuous paper side, and the continuous paper is pushed out by the action of the airflow generated by the swinging of the paddle in the opposite direction to the continuous paper side. By pulling in the paper, the continuous paper is caused to swing and fall onto the paper table, and the photoelectric detector detects the height of the top surface of the continuous paper that is sequentially stacked on the paper table while being folded. A paper table sequential lowering method characterized in that the paper table is lowered by a predetermined height when the detection output of a photoelectric detector continues for a predetermined time or more.