JPS63134244A - Printing pressure setting controller for sheet-feed press - Google Patents

Abstract

PURPOSE:To automatically set a gap between a blanket cylinder and an impression cylinder according to paper thickness, by adjusting the gap by turning an eccentric bearing, displaying a paper thickness corresponding to the gap by a position detector, and making it possible to input a paper thickness through a ten-key pad. CONSTITUTION:A motor 20 is driven to operate a sector gear 11, thereby turning an eccentric bearing 3 with a point (a) as a center, whereby the center (b) of a blanket cylinder 2 is moved toward and away from an impression cylinder 1, with a radius equal to the eccentricity (e). Concurrently, an adjusted gap is detected by an absolute position detector (potentiometer 34) operated in conjunction with the motor and a detecting circuit thereof, and a detection signal from the meter 34 is subjected to A/D conversion. A digital value thus obtained is stored into a memory, and is displayed on a display part. In addition, a paper thickness is inputted through a ten-key pad provided on an operating panel. Thus, all printing units are simultaneously set automatically to the gap corresponding to the paper thickness.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention remotely controls the printing pressure between the impression cylinder and the blanket cylinder of a sheet-fed printing machine automatically according to the paper thickness, and simultaneously for each printing unit. This is related to the printing pressure setting control device, and is also applicable to adjusting the printing pressure between the impression cylinder and blanket cylinder of a rotary printing press that has an impression cylinder. It is possible.

[Conventional technology]

A sheet-fed offset printing machine composed of 5 and 4 printing units shown in Fig. jg3 will be explained. In Figure 4, impression cylinder 1
There is a gap 8 between and the rubber cylinder 2, and this gap 8! The eccentric bearings 3 and 3' fitted into the shafts 2a and 2b at both ends of the drum body 20 are the same, and the center a of the eccentric bearings 3 and 3' is connected to the shaft 2a.
, 2b are eccentric by θ. Threaded rod 4, 4'
Rotate knobs 4a and 4'a by hand to remove eccentric bearing 3.
, 3"i. The rubber cylinder 2 is rotated at a radius of the eccentricity e around the center point A of the eccentric bearing 3.3', and moves closer to the impression cylinder 1 and then moves away from it.

If the paper thickness is 2t, the printing pressure p is approximately p = t - s
(or 5 = p) (see Figure 1).The printing pressure is approximately 0,
The standard is 1 rm. If this standard printing pressure is changed and the paper thickness is constant, turn the threaded rods 4 and 4' by hand to increase the gap θ by an amount that differs from the standard printing pressure. All you have to do is adjust while looking at the scale (not shown).

(Note) Parts 4/, 4'a, and 3/ are rubber cylinder 2.
The part gold shown is open to the shaft 2b at one end of the shaft.

[Problem that the invention seeks to solve]

(]) Every time the paper thickness changes, the printing pressure of each printing unit must be adjusted in response to changes in paper quality, paper thickness, or these changes between printing units. At that time, it is necessary to move the threaded rods of each printing unit (there are 8 in the four-color offset sheet-fed printing machine mentioned above), which results in a large loss of time, and with such a large number of operating points, it takes a lot of effort from the operator. It's a heavy burden.

+21 The gap is read as 1 on the needle, but it is difficult to accurately read the gap in units of 0.01 m with that needle. Furthermore, it is difficult to make the gap at both ends of the blanket cylinder the same with the pointer, which results in a printing pressure gradient in the direction of the rotation axis of the blanket cylinder.

(3) If the paper thickness is not known in advance, the paper thickness must be measured.

[Means for solving problems]

(1) The eccentric bearings at both ends of the blanket cylinder are simultaneously rotated via a single drive shaft by a motor, a speed reducer linked to the motor, and both vehicle groups, etc., to adjust the clearance.

(2) As the motor rotates, a signal (voltage) is sent from a position detector (for example, a potentiometer) that is linked to the motor.
A circuit is installed to A/D convert the data and store it as a digital value, and the signal from the position detector is displayed on the operation panel of the control device to determine the paper thickness (1=θ0p...th (see Figure 1) can be displayed.

+37 Also, by inputting the paper thickness from the numeric keypad on the operation panel, all printing units are simultaneously set to the gap s = t - p corresponding to the paper thickness.

(4) Furthermore, a remote control function is provided so that the gap between each printing unit can be finely adjusted for the same paper thickness. Depending on the paper thickness, paper quality, or their changes occurring between printing units, the gap opening sound for each printing unit is changed to change the printing pressure, or it is kept constant.

[Effect]

(1) By rotating the reducer, gears, etc. that are linked to the motor, the gaps at both ends of the blanket cylinder can be adjusted at the same time with one drive shaft, and the values can be made the same. No pressure gradient occurs.

(2) A/D converting the signal sent from the position detector,
Gap can be displayed numerically.

(3) By simply inputting the paper thickness using the numeric keypad, all printing units are simultaneously set to the gap corresponding to the paper thickness.

(4) The printing pressure of each printing unit can be finely adjusted individually by remote control operation.

〔Example〕

+IJ First embodiment (Figs. 1 to 3) [In this embodiment, a potentiometer is used as a position detector. ] In FIG. 1, a sector gear 11 is fixed to the eccentric bearing 3 with bolts 12, etc., and meshes with a pinion 13. The pinion 13 is fixed to the drive shaft 14 with a key or the like. Therefore, by rotating the drive shaft 14, the eccentric bearing 3 rotates around point A, and the center opening point of the rubber cylinder 2 is at a radius of eccentricity e.
As it rotates, the rubber cylinder 2 approaches the impression cylinder 1 9 and moves away from the impression cylinder 1 . A gear 15 and a bevel gear 16 are attached to the drive shaft 14, and the bevel gear 17 meshes with the bevel gear 16, and the bevel gear 17 has a clutch 18, a reducer 19, a motor 2o, and a brake 21 that have the same shaft center. and then combine them. When the brake 217 is released, the first clutch is engaged, and the motor 20 is operated, the drive shaft 14 rotates via the bevel gears 17L and 16. The drive shaft 1 is used to display the current printing pressure p and to detect the amount of rotation of the motor 20 when all printing pressure settings have been made to the new nine.
A potentiometer 34 is provided via a gear 22 that meshes with the gear 15 of No. 4, so that the printing pressure state can be constantly monitored.

The slider racket 23 is used to support the motor 20 and the like, and is adapted to receive the reaction force of the rotational torque of the drive shaft 14 generated by operating the motor 20.

When the manual handle 24 is inserted into the drive shaft 14 for manual operation, the proximity switch 25 for detecting the presence or absence of the manual handle 24 is activated, the clutch 18 is automatically released, and the drive shaft 14 is opened with a light force. can be turned. Note that the manual handle 24 is to be removed after the manual operation is completed. Also, during printing work, the clutch 18 engages and the brake 21 acts to prevent the printing pressure from fluctuating.
position is fixed. When the entire printing press is in the unloaded state with the manual handle 24 removed, the apparatus becomes operable.

It consists of a control device 30, a main control circuit 31, an operation display section 33, and a motor drive circuit 32.

The main control unit 31 includes a CPU 3Le and a ROM 31.
a, a RAM 31b, an A/D conversion circuit 31c, and an input/output interface circuit 31 (l), and an operation display section 3.
3, various push buttons 733A are connected to the input/output interface circuit 33 connected to the main control section 31d. , various LEDs
33m, and a display 33b are installed, and various push buttons 331. ．． Various LEDs 33m and a display 33b are incorporated into an operation panel 33p. Further, the motor drive circuit 32 is connected to the main control circuit 31d. The gap θ corresponding to the paper thickness t of each printing unit 5 is t = s +
Since p is the standard printing pressure and is 0.1 gourd, the paper thickness t is the gap 8
It can be thought of as representing That is, when the paper thickness t changes, the gap 8 can be changed to maintain the standard printing pressure. For this purpose, the C remoter 20 is rotated to the motor drive circuit via the main control unit 31di, and the gap 8 is changed as the total paper thickness t changes, and the potentiometer 34 linked to the main control unit AD converter 31c' The circuit configuration sound is taken as feedback to the CPU via i.

The signal from the potentiometer 34 is sent to the A/D converter 31c.
The data is converted into a digital quantity and stored in the memory 1JRAM 31b. The preset operation is performed by inputting C5 paper thickness into the numeric keypad 33a on the operation panel 33p.
1) The value is displayed.N Preset start key 33cv
When the i button is pressed down, adjustment of the gap 8 corresponding to the displayed paper thickness t (set paper thickness) starts simultaneously for each printing unit. This preset is set by the main controller's CP so that the gap 8 of all printing units 5 is equal to the gap S corresponding to the set paper thickness t.
U311SK uses motor drive circuit 32 and A/D conversion circuit 31c to rotate motor 2 (l forward or reverse,
FA by feedbacking the gap between each printing unit from the potentiometer! I! Complete the process from the gap 8 corresponding to the set paper thickness and the length 7'5z. Next, the remote control operation begins by selecting the printing unit 5 using the unit selection key 33 (l).The selected fL gap t of the next printing unit 5 is displayed on the display 331.

When Tamayu presses down the snake key 33e, the motor drive circuit 32 operates while the key is pressed down, changing the gap date of the selected nfe printing unit 5 and changing the display on the display 331).

The above operation will be explained using the AN diagram in FIG. 3 which explains the operation. The potentiometer (11) of each printing unit 5 is A/D converted and stored as paper thickness data in the memory 31b. Next, select the mode of preset or remote control. Input.The input value is displayed on the display 33b (103).Next, the displayed contents are stored in the Memo!731bVC as setting data (104).Here, when the preset start key 33c is pressed (105) yqs),
Paper thickness data (paper thickness converted from adjusted gap S)
and the setting data (value displayed on the display 331) are equal (1o6) 2 If they are not equal (106 (7) N□) drive % -fi 20 (107 ). At this time, if the paper thickness data>setting data, the motor 20 rotates in reverse, and if the paper thickness data>setting data, the motor 20 rotates forward. Since the potentiometer signal changes as the motor rotates, it is A/D converted (108) and compared with the setting data again as paper thickness data. Repeat this step (106 to 108) until paper thickness data = setting data. When they are equal (1o6 yes), the motor 20 is stopped (109). When the adjustment of all printing units 5 is completed, the presetting is completed (110). Then, the state returns to the initial state 5TART.

(102) If the ResoCon mode is selected, first press the selection key 33 (L) with the same unit number as the printing unit 5 to be adjusted this time.The paper thickness of the printing unit 50 selected at that time is displayed on the display 331. Display (122).

Next, it is checked whether or not there is an instruction to fine-adjust all printing units 5 at the same time (123). In the case of instruction cloth (123 yee), pressing the 1+1 key 338 rotates the motors 20 of all printing units in the forward direction, and pressing the 1-1 key 33e rotates the motors 20 of all printing units in the reverse direction (124).

126). Also, if there is no instruction (No of 123), 1+
If the 1 key 33e is pressed, the motor 20 of only the selected printing unit is rotated in the forward direction, and if the '-1 key 33e is pressed, the motor 20 is rotated in the reverse direction (124-127). (1+Zl
l When neither key 33e is pressed, or when both keys 33e are pressed, the motor 20 stops. ) Next, in either case, the potentiometer signal from each printing unit 5 is
/D conversion and storage as paper thickness data, which is displayed on the display 33'.
b (128). In the remote control mode, this operation (101, 102, 121-128) is repeated.

(2) 25th! Embodiment (FIGS. 4 to 6) [In this embodiment, a potentiometer is used as a position detector. ] In FIG. 4, a sector gear 11 is fixed to the eccentric bearing 3 with bolts 12, etc., and meshes with a pinion 13. The pinion 13 is fixed to the drive shaft 14 with a key or the like. Therefore, by rotating the drive shaft 14, the eccentric bearing 3 rotates around point A, and the center opening point of the blanket cylinder 2 rotates with a radius of eccentricity e, so that the blanket cylinder 2 approaches the pressure S51 or Move away from the torso for one move and then move away. A gear 15 and a bevel gear 16 are attached to the drive shaft 14, the bevel gear 17 meshes with the bevel gear 16, and the bevel gear 17 has a clutch 1.
8, a reducer 19, a motor 20, and a brake 21 are combined with the same shaft center.

When the brake 21 is released, the clutch 1s is engaged, and the motor 20f is operated, the drive shaft 14 rotates via the bevel gears 17 and 16. Display of the current printing pressure po and risk of detecting the amount of rotation of the motor 20 when a new printing pressure is set. I'm working hard to keep track of what's going on.

The bracket 23 is for supporting the motor 20 and the like, and is designed to receive the entire reaction force of the rotational torque of the drive shaft 140 generated when the motor 20 is operated.

To perform manual operation, when the manual handle 24 is inserted into the drive shaft 14, the ninth proximity switch 25 that detects the presence or absence of the manual handle 24 is activated, and the clutch 18 is automatically released. ``I!r.

It can be turned. Note that the manual handle 24 is to be removed after the manual operation is completed. During the printing operation, the clutch 18 is engaged and the brake 21 is activated, so that the position of the blanket cylinder 2 is fixed so that the printing pressure does not fluctuate. When the manual handle 24 is removed and the entire printing press is in the unloaded state, the apparatus is ready for operation.

The control device 30 includes a main control section 31. It consists of an operation display section 33, a motor drive circuit 32, and a paper thickness detector 35. The main control unit 31 includes a CPU 31e and a ROM 31a.

RAM 31t+, A/D conversion circuit 31a, workmanship 10, interface circuit 31 (1), operation display section 33
In the input/output interface circuit 33 connected to the main control unit 3111, various push buttons 33j and various LFj) 3
3m, a work indicator 33b is installed, various push buttons 33E, various LEI) 33m and a display 331) are incorporated into the operation spring 33p.

The paper thickness detector 35 consists of a distance detection sensor 35a and a stand 351). Press the paper thickness measuring device 33hi and the distance detection sensor 35
The paper placed on the stand 35b is irradiated with the processing light, and the reflected light is measured by the distance detection sensor 35a.

This distance data is converted into a digital value by iA/D conversion, and the paper thickness is calculated from that value. The calculated paper thickness is displayed on the display 331).

When presetting is started, the potentiometer data f of each printing unit 5 is A/D converted, displayed as a digital value, compared with the paper thickness, and if they are different, the motor drive circuit 32 causes the motor 20 to rotate forward or Reverse it. The motor 20 from the same printing unit 5 is stopped, and the presetting is completed when all printing units are finished.

Gap 8μt corresponding to paper thickness t of each printing unit =
With e + p, p1! Since the semi-printing pressure is 0.1 m, the paper thickness is t.
d! It can be thought of as representing the gap ef.

That is, in order to maintain the standard printing pressure when the paper thickness t changes, it is sufficient to change the gap s. For this purpose, the main control unit 31 (L) causes the motor drive circuit 32 to rotate the motor 20 to change the gap 8 as the paper thickness t changes, and the main control unit A /D converter 31c
The circuit has a circuit configuration that provides feedback to the CPU via f. The signal from the potentiometer 34 is sent to the A/D converter 3
At 1C, it is converted into a digital quantity and stored in the memory RAM 31b.

Preset operations are performed using the numeric keypad 33 on the operation panel 33p.
When the paper thickness is input using a, the value is displayed on the display 33t), and when the n1 preset start key 33c is pressed down, the gap 8 corresponding to the paper thickness t (set paper thickness) is displayed.
The adjustment is started for each printing unit simultaneously. This preset is executed by the CPU 31eK of the main control unit so that the gap 8 of all printing units 5 becomes the gap e corresponding to the set paper thickness t.
This p! It is completed from the final stage. Next, select the unit for remote control operation. -33 (Starts with the selection of the printing unit 5 by 1. The gap between the selected printing units 5 is displayed on the display 331).

When the date key 33e is pressed down, the motor drive circuit 32 is operated while the key 33e is pressed down, and the gap date of the selected nine printing units 5 is changed, and the display on the display 33'b is also changed.

The above operation will be explained with reference to the flowchart shown in FIG. 6 which explains the entire operation.

First, 5TART is possible if a cylinder removal signal is received from the main control device of the printing press. The potentiometer signal of each printing unit 5 is A/D converted and stored in the memory 31 as paper thickness data.
1) is stored in α01)t'. Next, all selections are made between preset and remote control (102).

After selecting the preset mode, input the preset data from the numeric keypad 33a. The input value is displayed on the display 331 (103).

Next, use the displayed contents as the setting data.31t1
(104).

If the preset start key 33a is pressed here (105, yes), the paper thickness data (filter paper thickness converted from the adjusted gap e) and the setting data (value displayed on the display 33b) will be equal. (10)
6) When they are not equal (No of 1 and 6), the motor 20 is driven. 107) At this time, if the paper thickness data is greater than the setting data, the motor 20 is reversed, and if the paper thickness data is less than the setting data, the motor 20 is immediately reversed. Turn around. Since the potentiometer signal changes as the motor rotates, it is A/D converted and compared with setting data as paper thickness data (108). Repeat this 10 times
6 to 108) until the paper thickness data and setting data are reached. When they become equal (106 μs), the motor 20 is stopped (109), and when all the printing units 5 have been adjusted, the preset is completed (110) and the return is made to the initial state 5TART)C.

(102) If Soso Conco F is selected, first print unit 5 to be adjusted this time and selected unit -3 with the same number.
Press 3d.

The paper thickness of the printing unit selected at that time is displayed on the display 33'b.
K Display (122). Next, all printing units 5 are
It is checked whether it is N (123). selection key 3
Press 3d once to turn it on, press it again to turn it off'
become. If it is ON (123 yes) “+”
When the key 33e is pressed, the motors 20 of all printing units are rotated in the forward direction, and when the 1-1 key 33e is pressed, the motors 20 of all printing units are rotated in the reverse direction (124, 126). When all printing units 5 are not turned on (N of 123
o) If the 1+1 key 33e is pressed, the motor 20 of only the selected printing process is rotated in the forward direction, and the a-1 key 3
If 3e is pressed, reverse it (125, 127)
.

#+m, l-@When neither key 33θ is pressed or when both are pressed, the motor 20 is stopped. In either case, the motor 20 is stopped. A/D f which is a potentiometer signal is stored as paper thickness data and displayed on the display 331) (1
28) Now, the presetting of the remote controller is completed 129) and returns to the initial state.

In the paper thickness measurement mode, data of the distance d between the distance detection sensor 35a and the paper is A/D converted from the data of the paper thickness detection circuit 35. The paper thickness is calculated from the distance d, and the distance do between the distance detection sensor 35a and the table 351 on which the paper is placed is stored in the memory as setting data (131). The value is displayed on the display 33b (132
). Next, proceed to press down the preset start key 33c (1
33). The subsequent judgments and operations are those of the preset mode described above (108, 109110, 111, 11
Exactly the same judgment and action as (133, 13) (2 and 113)
4, 135, 136, 137 and 138 correspond to each other). Note that the distance detection sensor 35a has a precision element lOμ.
Uses a high-precision sensor with a precision of over m.

〔Effect of the invention〕

(1) Circuit that drives the motor, circuit that detects gaps,
Since it has a paper thickness setting and display circuit and its control circuit, the gap between each printing unit can be automatically set for all units at the same time according to the paper thickness, reducing preparation time and reducing the labor burden on the operator. .

(Since the gap can be controlled remotely from the operation panel of the 21 control device, labor savings can be achieved.

(3) Fine gap adjustment for each printing unit can be made by remote control.Even for the same paper thickness, the printing pressure in each printing unit can be changed finely. (When it is necessary to change the printing pressure of each printing unit due to paper thickness, paper quality, or changes in paper thickness, paper quality, etc.)

(4) No printing pressure damage occurs.

[Brief explanation of the drawing]

Fig. 1 is a schematic layout diagram of an embodiment of the printing pressure setting control device for a sheet-fed printing press of the present invention, Fig. 2 is a detailed view of section A in Fig. 1, and Fig. 3 is the main body of the push button in the first embodiment. Fig. 4 is a schematic layout diagram of the second embodiment of the present invention, Fig. 5 is a detailed view of part B in Fig. 4, and Fig. 6 is a push button in the second embodiment. Figure 7 shows the configuration of a four-color offset sheet-fed press centered on the printing unit, and Figure 8 shows the manual clearance adjustment centered on the blanket cylinder in the printing unit. Show the device. t...Paper thickness 8...Gap p...Print pressure e...Eccentricity 1...Impression cylinder 2...Blank cylinder 3.3'...Eccentric bearing 4,4'...・Threaded rod 5... Printing unit 6... Plate cylinder 7... Paper 11... Sector gear 13... Pinion 24... Manual handle 25... Proximity switch 30... Control device 31.・・Main control section
32... Motor drive circuit 33... Operation display section 34... Potentiometer sub-agent Patent attorney
Shige Okamoto 2 people outside Figure 3

Claims (1)

[Claims] In a printing pressure setting control device that automatically controls the printing pressure between the impression cylinder and the blanket cylinder of a sheet-fed printing press according to the paper thickness and simultaneously remotely controls each printing unit, the printing pressure between the blanket cylinder and the impression cylinder is adjusted according to the paper thickness. a motor for adjusting the gap between and a circuit for driving the motor;
An absolute position detector and its detection circuit that operate in conjunction with the motor to detect the adjusted gap, and a circuit that A/D converts an analog signal detected by the detection circuit as the gap, stores it as a digital quantity, and displays it. and a control circuit that has a numeric keypad for inputting paper thickness values and can control the gap corresponding to the paper thickness according to the set value on a time-sharing basis for each unit and seemingly simultaneously adjust it, and each printing unit that makes up the sheet-fed printing press. A printing pressure setting control device for a sheet-fed printing press, comprising a control circuit that finely adjusts the printing pressure of each unit using a push button.