JPH11254654A - Registering unit for printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a printing quality by facilitating assembling, checking and maintenance, simplifying an apparatus, and eliminating influences of a registering error of a top and bottom direction due to a changing impact load during printing and integrating error. SOLUTION: The registering unit for a printer comprises an independently drive motor 23, an encoder 24, a drive helical gear 21, a widthwise registering regulator 5, a widthwise registering position detector 7, a widthwise controller 27, a calculator 29 inputting a widthwise correction signal from a manual signal or widthwise registering reader 30 of a widthwise registering control input signal to calculate a top and bottom direction moving correction amount, and a drive controller 28 for controlling a speed and relative rotating phase of the motor 23, a rotating direction phase based on a manual signal of a registering control input signal in a top and bottom direction or a correction signal in a top and bottom direction from a registering reader 31 of the top and bottom direction and a rotating direction phase based on a correction signal from the calculator 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a printing press,
The present invention relates to a registration device applied to registration between colors.

[0002]

2. Description of the Related Art A conventional register apparatus for a printing press will be described with reference to FIGS. FIG. 5 shows an entire configuration of a conventional register adjusting device for a printing press, and FIG. 6 shows an example of a top-to-bottom direction register adjusting device which constitutes a part of the register adjusting device.

First, in FIG. 5, reference numeral 2 denotes a plate cylinder which is a printing cylinder of an offset printing press, 3 denotes a blanket cylinder arranged opposite to the plate cylinder 2, and 4a denotes a plate cylinder for driving the plate cylinder 2. A drive helical gear, coaxially mounted on the drive helical gear, 4b coaxially mounted on the blanket cylinder 3 for driving the blanket cylinder 3, and meshed with the drive helical gear 4a; 20 is a drive line shaft for mechanically connecting the drive systems of the respective color printing devices, and for transmitting the driving force to the helical gears 4a and 4b;
5 is a width direction register adjusting device, 6 is a vertical direction register adjusting device,
Reference numeral 7 denotes a position detector that detects a width-direction register adjustment position, 8 denotes a position detector that detects a vertical-direction register adjustment position, and 9 denotes a plate cylinder driving drive helical gear 4a and the plate cylinder 2 in the rotational direction. A sliding key disposed between them so as to be fixed while being freely movable in the axial direction.

The above-described plate cylinder 2 has a bearing 19 mounted on a frame 19.
, And is rotatably supported about an axis, and is configured to be movable in the axial direction by the width direction register adjusting device 5. The driving helical gear 4a is disposed movably in the axial direction along a slide key 9 interposed between the plate helical gear 2 and the rotational direction position of the driving helical gear 4a. Regulated.

The printing press shown in FIG. 5 is for double-sided printing. In FIG. 5, a member without a dash “′” at the upper right of the reference number is for front side printing. Members with a dash "" at the top right of the number are for backside printing. Since the structure and operation of front side printing and back side printing are the same in principle, for simplicity, only the front side printing will be described below, and the back side printing A description of those will be omitted.

In order to adjust the register in the vertical direction, that is, in the rotational direction of the plate cylinder 2, the driving helical gear 4 a for driving the plate cylinder is moved in the axial direction of the plate cylinder 2 by the vertical register adjustment device 6. At this time, the driving helical gear 4a for driving the plate cylinder slides in the axial direction with respect to the plate cylinder 2 along the slide key 9, and this driving is performed only when the helical gear 4a is fixed in the axial direction. It moves with respect to the torso 2. Therefore, the driving helical gear 4
a plate cylinder 2 by an amount corresponding to the amount of twist of the teeth (a) of (a)
Is rotated with respect to the blanket cylinder 3. As a result, the pattern on the plate cylinder 2 is moved in the up-down direction with respect to the printing target printed in contact with the blanket cylinder 3, and the up-down direction registration is adjusted based on this.
However, although the driving helical gear 4a can move in the axial direction along the slide key 9 interposed between the plate helical gear 2 and the plate cylinder 2,
Since the rotation direction position is regulated by the top-down direction register adjustment device 6, it does not move in the rotation direction, so that the top-down direction does not change.

The top-down direction register adjusting device 6 shown as an example in FIG. 6 includes a mechanism for moving the driving helical gear 4 a in the axial direction along the slide key 9. This mechanism includes a bracket 10 fixed to a driving helical gear 4a, and a thrust bearing 11
And a movement which is rotatably mounted via a bearing 14 to a bracket 15 which is coaxially screwed to a threaded portion at the other end of the shaft 12 and is fixed to a frame 19 via a bearing 14. Gear 13 with screw for
The driving gear 26 meshed with the moving screw gear 13
And a motor 61 for driving the driving gear 26 to rotate. Thus, the driving gear 26 and the moving screw gear 13 are rotated in accordance with the rotation of the motor 61, and the shaft 12 is moved in the axial direction accordingly. A thrust bearing 11 disposed between the bracket 10 and the shaft 12
Thus, the shaft 12 is rotatable with respect to the bracket 10, and the shaft 12 is configured to move in the axial direction together with the bracket 10 and the driving helical gear 4a.

An operating piece 18 is provided at the other end of the shaft 12.
The operation piece 18 is attached to the bracket 1.
5 is inserted and arranged in a long groove 17 provided in the same. Thereby, the movement of the operation piece 18 in the rotation direction (the rotation direction of the shaft 12) is restricted, and the operation piece 18 can be moved in the axial direction (the axial direction of the shaft 12). On the other hand, a top-down direction register adjustment position detector 8 is installed on the bracket 15, and this top-down direction registration adjustment position detector 8 is assembled to the operation piece 18. The top-to-bottom direction register adjustment position detector 8 detects the amount of movement of the driving helical gear 4a in the axial direction, and detects the detected amount of movement and the amount of twist of the teeth (helical) of the driving helical gear 4a. Based on the above, the drive outputs a signal corresponding to the amount of movement of the helical gear 4a in the rotational direction (vertical direction).

The register adjusting device in the width direction has a similar structure, but the description thereof is omitted here.

[0010]

However, the actual mechanism is a motor 6 for driving the gear 13 with a thread for movement.
In actuality, a more complicated mechanism is often used in relation to the installable position 1 and other driving gears in the width direction.
The arrangement of the slide key 9 is such that the drive helical gear 4a is fixed in the rotational direction and can be moved in the axial direction. Although it is fixed in the direction, the driving helical gear 4 has a small gap that can move a little in the rotation direction.
a between the sliding key 9 and the sliding key 9. Accordingly, the small gap in the rotational direction between the helical gear 4a and the slide key 9 is gradually increased by being hit by the fluctuating impact load during the printing operation. The reality is that it is easy to appear as a misalignment that has a large effect.

As described above, the conventional registration device for a printing press has a complicated mechanism, so that it is difficult to assemble, maintain, check, etc., and it is expensive. There is a problem that there is a factor of quality deterioration.

SUMMARY OF THE INVENTION The present invention has been made in view of these problems, and an object of the present invention is to make it easy to assemble, maintain and inspect and to make the apparatus compact, and to provide a variable impact load during printing operation. Accordingly, it is an object of the present invention to provide a registration apparatus for a printing press having a configuration capable of eliminating the influence of misalignment in the vertical direction and accumulation errors due to the above, and consequently improving print quality.

[0013]

In order to achieve the above object, the present invention provides a single drive motor provided for each printing color, an encoder for detecting the drive phase and speed of the single drive motor, and a plate cylinder. A drive helical gear fixed to each of the plate cylinder and the blanket cylinder to drive the blanket cylinder together; a width-direction register adjusting device for adjusting the axial position of the plate cylinder; and detecting the width-direction register position. Width direction register position detector, and a width direction control device for controlling the width direction register, and a width direction correction control input signal, a manual signal or a width direction correction signal from the width direction register reading device.
An arithmetic device for calculating the amount of vertical movement correction; control of the speed and relative rotational phase of the single drive motor; rotation based on a manual signal as an input signal for vertical direction register control or a vertical direction correction signal from a vertical direction register reading device. The register control device of the printing press is constituted by the directional phase control and the drive control device for performing the rotational direction phase control based on the correction signal from the arithmetic unit. Further, in the present invention, instead of using the manual signal which is the width direction register control input signal or the width direction correction signal from the width direction register reading device as the input signal of the arithmetic unit, the width direction register adjustment device is used. Both or one of the transmitted movement command signal and the width direction position detection signal from the width direction register position detector is used as an input signal of the arithmetic unit.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIGS. 1 to 4, the same parts as those in FIGS. 5 and 6 are denoted by the same reference numerals, and redundant description will be omitted.

First, FIGS. 1 and 2 show a register apparatus of a printing press according to a first embodiment of the present invention.
In the figure, reference numeral 21 denotes a driving helical gear for connecting and driving the plate cylinder 2 and the blanket cylinder 3 for front side printing, and reference numeral 22 denotes a driving helical gear for connecting and driving the plate cylinder 2 'and the blanket cylinder 3' for back side printing. A driving helical gear, 23 is a front-body-side drive motor (single drive motor), and 23 'is a back-body-side drive motor (single drive motor). In the present embodiment, a drive line shaft 20 (see FIG. 5) for connecting each printing device is not provided, and a separate drive motor 23, for each color (each plate cylinder / ink device) of each printing device is provided. It is configured to operate at 23 'or the like. The top-down direction register adjustment device 6 (see FIGS. 5 and 6) is not provided, and the drive motors 23 and 23 'for operating the printing apparatus are also used as the up-down direction register adjustment device 6. I have.

The above-mentioned drive helical gears 21 and 22 are fixedly attached to the plate cylinders 2 and 2 'and the blanket cylinders 3 and 3', and are mounted on a slide key 9 (see FIGS. 5 and 6). The structure is simple without disposing any other components.
The width direction register adjusting devices 5 and 5 'are provided with
2 ', respectively, and the width direction register adjusting device 5,
At 5 ', the register in the width direction is adjusted by moving the plate cylinders 2, 2' in the axial direction.

Encoders 24, 2 for detecting the rotational phase (drive movement) and speed of the drive motors 23, 23 '.
4 'is a drive motor 23, 2 as shown in FIGS.
3 'is provided in each of the drive systems. In the following, since the control system on the front body side and the control system on the back body side are the same, only the control system on the front body side will be described.
Are driven and controlled by a drive control device 28 (see FIG. 2). As shown in FIG. 2, the drive control device 28 includes a speed signal and a phase signal common to the entire printing press supplied from the signal output unit 32, a manual top-down direction correction command signal (manual signal), or a top-down direction signal. Register reading device 3
1 and a signal from an arithmetic unit 29 for calculating a vertical movement correction value based on the width direction control amount is supplied as an input signal, and is fed back from the encoder 24. The rotation of the drive motor 23 is controlled while checking the adjustment result (control result) based on the rotation phase detection signal.

On the other hand, in response to a manual width direction correction command signal or a width direction movement command signal from the width direction register reading device 30, the adjustment result is confirmed by a position detection signal fed back from the width direction register adjustment position detector 7. Width direction control device 2 for performing position control by width direction register adjustment device 5
The register 7 is provided to control the register in the width direction (position control of the plate cylinder 2 in the axial direction).

The arithmetic unit 29 takes in a manual correction command signal, which is a width direction movement command signal, or a signal from the width direction register reading device 30, and sends a signal to the drive control device 28 for correcting a deviation in the vertical direction. Is transmitted. That is, the driving helical gear 21 moves in the axial direction together with the plate cylinder 2 as the plate cylinder 2 moves in the width direction, and the driving helical gear 21 is moved in the vertical direction by the amount of twist of the tooth portion (helical) of the driving helical gear 21. Therefore, the amount is calculated by the arithmetic unit 29, and the calculation result is sent to the drive control unit 28 as a correction signal for correcting the vertical shift.
Then, a command signal (synchronization command signal) for performing the correction is sent from the drive control device 28 to the drive motor 23. At this time, the drive control device 28 adjusts the amount of correction for the common phase signal of the entire printing press, and corrects the amount in the opposite direction by an amount corresponding to the amount by which the vertical direction is likely to shift by the width direction adjustment. It has become.

The drive controller 28 controls the speed and the relative rotational phase of the drive motor 23, and is based on a manual signal which is a top direction register control input signal or a top direction correction signal from a top direction register reading device. It is configured to perform rotation direction phase control and rotation direction phase control based on a correction signal from the arithmetic unit 29.

As described above, in this embodiment, the registration adjustment in the vertical direction is performed by the drive motor 23 that drives the printing apparatus.
It is to be performed in. That is, the drive motor 23 functions as a top-to-bottom register adjustment device 6 (see FIGS. 5 and 6) in the conventional registration device, and the drive motor 23 is used not only as a driving unit of the plate cylinder 2 but also in a top-to-bottom register. Also used as adjusting means. Accordingly, the drive speed and phase of the drive motor 23 are controlled by the drive control device 28 based on the speed / phase signal which is a common signal of the entire printing press, and a manual correction command signal or a signal from the vertical direction register reading device 31 is output. Drive control device 2 for register correction signal
8, and based on the control signal output from the drive control device 28, the respective drive motors 23, 23 ', etc., which are operated in the same phase as the other printing devices with a common speed / phase signal of the entire printing press. Is adjusted by a phase amount corresponding to the register correction amount. As a result, the rotation phase is changed relative to the portion driven by another drive motor.

This eliminates the necessity of the conventionally used top-down direction register adjusting device 6, which facilitates assembly, maintenance and inspection, and makes the device compact. In addition, the drive is fixed between the helical gear 21 and the slide key 9 in the conventional case because the helical gear 21 and the plate cylinder 2 are fixed without using the slide key 9. There is no gap in the rotation direction. Therefore, the gap does not increase due to the fluctuating impact load during the printing operation, and the misalignment in the vertical direction due to the gap is eliminated, so that the printing quality can be improved. However, the drive is helical gear 2
Since the register 1 and the plate cylinder 2 are fixed to each other, the register in the width direction is adjusted (moved).
In the present embodiment, a signal for adjusting the width direction is transmitted to correct the amount of shift in the top and bottom directions simultaneously with the register adjustment in the width direction. Therefore, it is possible to avoid such a problem that a shift in the vertical direction is caused in the register adjustment in the width direction.

FIG. 3 shows a register device of a printing press according to a second embodiment of the present invention. The register device of the present embodiment differs from the first embodiment described above in the width direction. Stop using the manual correction command signal or the width direction correction signal from the width direction register reading device 30 as the input signal of the arithmetic unit 29 that calculates the vertical direction correction value for the register adjustment. Position detection signal obtained from width direction register position detector 7 and width direction register adjustment device 5
A movement command signal supplied to a width direction register adjustment motor (not shown) is used. It should be noted that only one of these signals may be used as an input signal of the arithmetic unit 29.

Incidentally, since the amount of register adjustment is very small,
When a very small amount of correction signal is output, it may be picked up as an output signal or may be truncated.
Therefore, the integration error may become an effective value by repeating the correction signal many times. Therefore, as shown in the present embodiment, both or one of a signal (an output signal from the width direction registered position detector 7) relating to the absolute position actually moved and a signal (manual signal) as to whether or not there is a movement command is input. By taking in the arithmetic device 29 as a signal, the first
The same operation and effect as those of the embodiment can be obtained, and in addition, there is an effect that the influence of the integration error can be eliminated.

FIG. 4 shows a register device for a printing press according to a third embodiment of the present invention. In the register device of this embodiment, a divided plate cylinder composed of a main body plate cylinder 2a and a cylindrical plate cylinder 2b is used instead of the plate cylinder 2 used in the first and second embodiments described above. ing. Then, a body-side drive motor (single drive motor) 23a for driving the body-side plate cylinder 2a and the printing apparatus, an encoder 24a for the body-side drive motor 23a, and a cylindrical drive motor (for driving the cylinder-side plate cylinder 2b) Single drive motor) 23b
And an encoder 24b for the cylindrical drive motor 23b
Are provided respectively. Further, a width direction register adjusting device 5a and a width direction register adjusting position detector 7a are provided corresponding to the main body side plate cylinder 2a, and the width direction register adjusting device 5b and the width direction register adjusting position detector 7b are cylindrical side plate. Body 2
b. Although not shown, an arithmetic unit (corresponding to the arithmetic unit 29 in FIG. 2 or 3) and a drive control unit for the drive motors 23a and 23b (FIG. 2) are associated with the width direction register adjustment devices 5a and 5b. Or the drive control device 28 of FIG. 3).

The same operation and effect as in the case of the above-described first embodiment can be obtained also in the case of the divided plate cylinder type printing press having such a configuration.

[0027]

According to the first aspect of the present invention, there is provided an encoder for detecting a drive phase and a speed of a single drive motor provided for each printing color, a width direction control device for controlling a width direction register, and a width direction register. A computing device that takes in a manual signal as a control input signal or a width direction correction signal from a width direction register reading device and calculates a vertical movement correction amount, and controls the speed and relative rotational phase of the single drive motor, and a vertical direction registration. A drive control device for performing a rotational phase control based on a manual signal as a control input signal or a vertical direction correction signal from a vertical direction register reading device and a rotational direction phase control based on a correction signal from the arithmetic device is additionally provided. The register adjustment in the vertical direction can be performed by a single drive motor that drives the printing apparatus. It can impart a circumferential direction registration adjustment function in addition to its function as a dynamic. Therefore, since the above-mentioned single drive motor can be used also as a top-down direction register adjustment device, the conventionally used top-down direction registration adjustment device can be omitted, thereby facilitating assembly, maintenance and inspection, and downsizing of the printing press. Can be achieved. further,
With the omission of the vertical direction register adjustment device, it is possible to fix the drive helical gear to the plate cylinder without using a slide key, and in the past, the slide key and the drive exist between the helical gear. It is possible to eliminate the gap in the rotating direction that has been occurring. For this reason, misregistration in the vertical direction caused by the existence of the gap can be eliminated, and the print quality can be improved.

According to a second aspect of the present invention, a manual signal as a width direction register control input signal or a width direction correction signal from a width direction register reading device is used as an input signal of the arithmetic unit. Since both or one of the movement command signal sent to the drive motor of the width direction register adjusting device and the width direction position detection signal from the width direction register position detector is used as an input signal of the arithmetic unit, In addition to the same operation and effect as described above, the influence of the accumulation error can be eliminated. In other words, the integration error may become an effective value by repeating the correction signal many times,
By taking as input signals both or one of the signal regarding the absolute position actually moved and the signal as to whether or not there is a movement command as an input signal, the effect of the integration error is eliminated.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a register device of a printing press according to a first embodiment of the present invention.

FIG. 2 is a system diagram showing a control system of the register device of FIG. 1;

FIG. 3 is a system diagram showing a control system of a register device of a printing press according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram illustrating a register device of a printing press according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram showing a conventional register device of a printing press.

FIG. 6 is an enlarged sectional view showing a top-to-bottom direction register adjusting device in the registering device of FIG. 5;

[Explanation of symbols]

 2 plate cylinder 2a body-side plate cylinder 2b cylindrical-side plate cylinder 3 blanket cylinder 5,5 ', 5a, 5b width direction register adjusting device 7,7', 7a, 7b width direction position detecting device 21,21a, 21b, 22 drive Helical gear 23, 23 'Drive motor (single drive motor) 23a Body side drive motor 23b Cylindrical drive motor 24, 24', 24a, 24b Encoder 27 Width control device 28 Drive control device 29 Arithmetic device 30 Width register Reading device 31 Top / bottom direction register reading device 33 Common speed / phase signal output unit

Claims (2)

[Claims] (A) a single drive motor provided for each printing color; (b) an encoder for detecting a drive phase and speed of the single drive motor; and (c) a drive for connecting and driving a plate cylinder and a blanket cylinder. A drive helical gear fixed to the plate cylinder and the blanket cylinder, respectively; (d) a width direction register adjusting device for adjusting an axial position of the plate cylinder;
(E) a width direction register position detector for detecting a width direction register position; (f) a width direction control device for controlling the width direction register; and (g) a manual signal or width direction register which is a width direction register control input signal. (H) an arithmetic unit for receiving a width-direction correction signal from the reading device and calculating a vertical-direction movement correction amount;
Control of the speed and relative rotational phase of the single drive motor,
A drive control device for performing rotation direction phase control based on a manual signal that is a top direction register control input signal or a top direction correction signal from a top direction register reading device, and rotation direction phase control based on a correction signal from the arithmetic unit. And a register device for a printing press. 2. Instead of using a manual signal as a width direction register control input signal or a width direction correction signal from a width direction register reading device as an input signal of the arithmetic unit, the signal is sent to the width direction register adjustment device. 2. A register of a printing press according to claim 1, wherein both or one of a moving command signal and a width direction detection signal from a width direction registration position detector is used as an input signal of said arithmetic unit. apparatus.