JP2632304B2 - Register presetting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention adjusts the position of a compensator roller disposed between printing units to change a web path value between the printing units to obtain a multicolor print. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a register registration device capable of automatically performing initial registration based on a plate cylinder circumference value in a printing press for adjusting a vertical register.

[Conventional technology]

In gravure printing and the like, the printed material pitch is determined by the circumference of the printing cylinder used (hereinafter referred to as the printing cylinder circumference value), and the printing cylinder circumference value is greatly changed every time an item is switched, that is, depending on the type of printing material. Changes to Therefore, when the plate cylinder circumference value changes due to the item switching, it is necessary to adjust the initial register, specifically, the vertical register prior to the actual printing.

Generally, a compensator roller for adjusting the length of a web path (hereinafter, referred to as a web path value) is provided between printing units of a printing press, and the web path value is variable. If the movement of the compensator roller is small and the perimeter of the plate cylinder changes significantly, the vertical register cannot be adjusted with the compensator roller alone.In such a case, the reference position of each plate cylinder attached to each printing unit must be adjusted. The vertical register is adjusted by changing it as appropriate. However, in order to change the reference position of the plate cylinder, it is necessary to disengage the clutches of the plate cylinder shaft and the driving shaft, rotate the plate cylinder, correct the reference position, and re-engage the clutch. There is a disadvantage that it takes a long time to adjust. In order to solve this drawback, an improvement has been made to increase the amount of movement so that the vertical register can be adjusted only by moving the compensator roller even when the circumferential length of the plate cylinder changes from minimum to maximum.

FIG. 4 is a schematic view of a printing unit of a printing press in which vertical registration can be adjusted only by moving a compensator roller. In the figure, 51, 52, 53 are plate cylinders, 54, 55, 56 are impression cylinders, 61,
62 is a compensator roller, 70 is a guide roller, W is a printing sheet, M1, M2 and M3 are registration marks provided on the plate cylinders 51, 52 and 53, and the registration marks M1, M2 and M3 are plate marks in the figure. Although it is located on the side of the cylinder, it is actually provided at the circumferential end of the plate cylinder.

Next, a method of adjusting the initial register in the printing press shown in FIG. 4, that is, the vertical register performed prior to the printing of the present application will be described.

First, the positions of the register marks M1, M2, and M3 of the plate cylinders 51, 52, and 53 of each printing unit are fixed. In the figure, the impression cylinder 5
Registration marks M1, M2, M3 are aligned directly below 4, 55, 56. Next, the impression cylinders 54, 55, and 56 are pressed against the plate cylinders 51, 52, and 53, and the printing press is operated to perform test printing on the sheet W. Next, the pressing of the impression cylinder is released to stop the printing machine, and the amount of misregistration of the vertical register of the pattern printed on the sheet W is measured.

FIG. 5 shows a state of the sheet W obtained by the test printing. As shown in the drawing, the registration marks M1, M2, and M3 on the plate cylinders 51, 52, and 53 at the side edges of the sheet W,
Marks m1, m2, and m3 are printed. Therefore, the measurement of the vertical register shift amount is performed by measuring each interval between the marks m1, m2, and m3, and the obtained shift amount is defined as x.

Next, the vertical register is adjusted by moving the compensator rollers 61 and 62. The compensator rollers 61 and 62 are connected to a moving device (not shown) driven by a motor or the like so that they can move up and down by a predetermined amount.
In the drawing, the compensator roller is set so that the web path value can be changed by twice the moving amount with respect to the moving amount. Therefore, as described above, when the vertical register shift amount is x, the compensator rollers 61 and 62 are moved from P0 to P1.
Should be moved to the position of x / 2.

The operation of moving the compensator rollers 61 and 62 from the position P0 to the position P1 is performed based on the operator's intuition. That is, rough adjustment is performed by moving the compensator rollers 61 and 62 by x / 2 by eye measurement with reference to a scale plate (not shown) indicating the positions of the compensator rollers 61 and 62. Next, the printing press is again operated to perform test printing on the sheet W, and the deviation amounts of the marks m1, m2, and m3 are measured, and the compensator rollers 61 and 62 are moved based on the measured values. The movement of the compensator rollers 61, 62 at this time is not performed with reference to the scale plate as described above, but the printing press is operated at a low speed, and the marks m1, m2, m3 printed on the sheet W are visually checked. This is performed by moving the compensator rollers 61 and 62 while chasing with. This operation is performed until the marks m1, m2, and m3 on the sheet W match, and the adjustment of the vertical register is completed.

[Problems of the prior art]

However, in such a method of adjusting the vertical register, since the operator moves the compensator roller by visual measurement so as to eliminate the deviation amount of the mark obtained by the test printing, it takes a long time to adjust the printing press. In addition to being unable to operate efficiently, there is a problem that a large number of print sheets must be used for trial printing. In particular, when the number of colors to be printed is large, the shift amounts of the marks to be printed are accumulated, and it takes a considerable amount of time to complete the vertical registration of all colors and start printing in the present application.

[Object of the invention]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and adjusts the position of a compensator roller disposed between printing units to change a web path value between printing units, thereby enabling a vertical registration of a multicolor printed matter. It is an object of the present invention to provide a device for adjusting the vertical registration of a printed matter, which is performed prior to actual printing, without performing trial printing, in a short time without performing test printing.

[Summary of the Invention]

In order to achieve this object, a first aspect of the present invention is a printing press that adjusts a vertical register of printing by changing a web path value between printing units by adjusting a position of a compensator roller disposed between printing units. A register presetting device for automatically performing initial registration based on a plate cylinder circumference value, comprising: an input device for inputting a plate cylinder circumference value; and a plate input from the input device. An arithmetic and control unit that derives an appropriate position of the compensator roller in which the web path value is an integral multiple of the plate cylinder peripheral value based on the waist length value, and the compensator roller according to an output from the arithmetic and control unit, And a moving device for moving to a proper position, and the arithmetic and control unit further comprises a compensator low based on the plate cylinder circumference inputted from the input device. A first arithmetic circuit for calculating a web path initial value when is at the origin position, and a compensator roller based on the plate cylinder circumference value input from the input device and the web path initial value calculated from the first arithmetic circuit And a second arithmetic circuit that calculates an appropriate position of the register preset device.
It is preferable that the first arithmetic circuit includes a function for calculating a web path initial value using the plate cylinder circumference value as a variable.

In order to achieve this object, a second invention is directed to a printing press that adjusts a vertical register of printing by changing a web path value between printing units by adjusting a position of a compensator roller disposed between printing units. In the register preset device that automatically performs initial registration based on the plate cylinder circumference value, the register preset device is an input device for inputting the plate cylinder circumference value, and input from the input device An arithmetic control unit that derives an appropriate position of the compensator roller in which the web path value is an integral multiple of the plate cylinder peripheral value based on the plate cylinder circumference value, and a compensator roller that outputs an And a moving device for moving the compensator roller to the appropriate position. It also provides a register preset apparatus, characterized in that comprises a combination table defined for the data.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing an embodiment of the apparatus of the present invention, wherein 1 is an input device for inputting a plate cylinder circumferential value,
Is an arithmetic and control unit, 3 is a compensator roller drive circuit,
4 is a motor, 5 is a rotary encoder, 11 and 12 are bevel gears, 13 and 14 are support members, 15 is a lead screw, and 16 is a moving member. As shown, the compensator roller 61
Is rotatably supported by a moving member 16, the moving member 16 is engaged with a lead screw 15, and both ends of the lead screw 15 are rotatably supported by fixing members 13 and 14, and the fixing member
Reference numerals 13 and 14 are fixed to a frame (not shown) of the printing press. A bevel gear 12 is fitted and fixed to one end of the lead screw 15, meshes with the bevel gear 11 fitted and fixed to the shaft end of the motor 4, and is connected to the rotary encoder 5. Therefore, by rotating the motor 4, the lead screw 15 rotates, and the compensator roller 61 moves up and down together with the moving member 16, and the amount of movement of the compensator roller 61 at this time is detected by the rotary encoder.

Next, the operation will be described. Since the configuration of the printing unit is the same as that shown in FIG. 4, FIG.
Description will be made based on the drawings.

First, the positions of the registration marks M1, M2, and M3 of the plate cylinders 51, 52, and 53 are fixed. The positioning at this time can be accurately performed by using a positioning jig using a pointing needle or the like. Next, compensator rollers 61 and 62
To the origin position. Here, the origin position is P0, but the compensator roller 61,
The operation of moving 62 can be easily and automatically performed by opening a limit switch for detecting the origin position.

Next, the plate cylinder circumference value 1 is input from the input device 1. This input may be performed by providing a numeric keypad or the like on the input device 1 and directly inputting a numerical value, or by reading data from a magnetic card or the like in which data of a plate cylinder circumference value is recorded in advance. You may. When the printing cylinder circumference value 1 is input in this way, the arithmetic and control unit 2 immediately starts the calculation based on the input printing cylinder circumference value l, and the web path value between the printing units is changed to the printing cylinder circumference. The position of the compensator roller 61 that is an integral multiple of the circumference value l (printing with a web path at such a position matches the vertical registration,
Hereinafter, such a position will be referred to as an appropriate position.) P1 is calculated as a value d, and this value d also corresponds to the amount when the compensator roller 61 is moved from the origin position P0 to the appropriate position P1. (If the origin position is set to 0, the value of d at the proper position is the movement amount.) The calculated value d is the vertical registration when the compensator roller 61 shown in FIG. 4 is at the position of the origin P0. This is a value corresponding to the amount x / 2 of moving the compensator roller 61, which is derived by simply dividing the deviation amount x into two. Then, this movement amount d
Is calculated, the compensator roller drive circuit 3 operates to rotate the motor 4. The rotation of the motor 4 rotates the lead screw, and the compensator roller 61 shown in FIG. 1 rises. The amount of movement of the compensator roller 61 at this time is converted into a pulse signal by a rotary encoder, and this pulse signal is given to the compensator roller drive circuit 3. Next, when the compensator roller reaches the appropriate position of P1 shown in FIG. 4, that is, when the number of pulses corresponding to the movement amount d is given from the rotary encoder to the compensator roller driving circuit 3, the operation of the compensator roller driving circuit 3 is started. The motor 4 stops and the rotation of the motor 4 stops. Also compensator roller
The compensator roller 62 is also provided with the same compensator roller drive circuit, lifting mechanism, rotary encoder, and the like as described above. Based on the calculation result of the arithmetic and control unit 2, the compensator roller 62 is displaced by the movement amount d from the origin position P0. To the appropriate position P1.

By moving the compensator rollers 61 and 62 in this way, the web path value between the printing units changes and becomes an integral multiple of the plate cylinder circumference value, and the vertical register adjustment is completed.

FIG. 2 specifically shows the configuration of the arithmetic and control unit 2 shown in FIG. 1. In FIG. 2, the arithmetic and control unit 2 includes a first arithmetic circuit 21 and a second arithmetic circuit 22. I have.

The first arithmetic circuit 21 is the length of the web path between the printing units when the compensator roller is at the origin position P0, based on the plate cylinder circumference value l input from the input device 1 shown in FIG. it is a circuit for calculating a web path initial value L _0. The arithmetic circuit 21, by the position of the impression cylinder 54, 55 and 56 at the time of printing the circumference l changes of the plate cylinder 51, 52 and 53 is changed up and down, the web-path initial value L ₀ between the printing units Will also change. Thus, since the web path initial value L ₀ changes in response to the change of the plate cylinder circumference l, the web path initial value L ₀ is regarded as a function using the plate cylinder circumference l as a variable. ,
The web pass initial value L ₀ corresponding to the plate cylinder circumference value 1 is calculated based on such a function. In the present embodiment, the web path initial value L ₀ is represented by a quadratic function L ₀ = f (l) = al ² + bl + c using a, b, and c as constants and the plate cylinder circumference l as a variable. This quadratic function calculates the value of the web path initial value L ₀ corresponding to the plate cylinder circumference value 1 by drawing or the like, and calculates the minimum 2
It can be obtained by a power approximation or the like. Note that L ₀ is not limited to a quadratic function, and may be another function.

The second arithmetic circuit 22 calculates the printing drum circumference value l input from the input device 1 shown in FIG. 1 and the web calculated by the function in the first arithmetic circuit 21 and input from the first arithmetic circuit 21. based on the path initial value L _0, the web-path value between the printing unit is a circuit that calculates the correct position of the compensator roller as an integral multiple of the plate cylinder circumferential length value l, is expressed by the following equation.

Explaining the expression here, INT in the above expression
[K] represents a maximum integer not exceeding K, d represents an appropriate position of the compensator roller as described above, and is used when adjusting the vertical register corresponding to the plate cylinder circumference value l. It is also the amount of movement of the compensator roller.

Therefore, when the plate cylinder circumference value l is input from the input device 1 to the first arithmetic unit 21 and the second arithmetic unit 22, the first arithmetic unit 21 corresponds to the plate cylinder circumference value l by the formula. web path initial value L ₀ is calculated. Initial value of this web path
The value of L ₀ is input to the second arithmetic circuit 22 and the second arithmetic circuit 22
In step 22, the movement amount d of the compensator roller is calculated based on the equation. The compensator roller driving circuit 3 shown in FIG. 1 operates based on the calculated movement amount d, and the web path value is set to the initial value with the movement of the compensator roller by the operation of the compensator roller driving circuit 3.
The length of the web path changes from L ₀ by twice the amount of movement d of the compensator roller, the web path value changes to the value of nl in the equation, and the vertical register adjustment is completed.

FIG. 3 is an explanatory diagram showing another embodiment of the arithmetic and control unit 2 shown in FIG. In this case, a table 3 as shown is incorporated in the arithmetic and control unit 2. The table 30 contains the data of the plate cylinder circumference l and the data of the appropriate position of the compensator roller corresponding to the plate cylinder circumference l. Specifically, the movement of the compensator roller when the web path between the printing units becomes an integral multiple of l It is a table of the combination with the quantity d, and can be easily created by previously obtaining the relationship between l and d from drawing, actual measurement, and the like. Accordingly, when the plate cylinder circumference value 1 is applied from the input device 1 shown in FIG. 1 to the arithmetic control device 2, the arithmetic control device 2 receives the plate cylinder circumference inputted based on the table 30 shown in FIG. The compensator roller driving circuit 3 is operated by selecting the moving amount d of the compensator roller corresponding to the value l, and the web path value is at the origin position with the movement of the compensator roller by the operation of the compensator roller driving circuit 3. The web pass value changes to a value that is an integral multiple of the plate cylinder circumference value 1 by twice the length of the movement amount d of the compensator roller from the value at the time, and the adjustment of the vertical register is completed. In this example, the plate cylinder circumference value is 500 m
A table is set to set l every m and covers a combination of the l and the corresponding d data, but the value of l is not limited to this.

In the above-described embodiment, the compensator roller first returns to the origin position, and then moves to the appropriate position of the compensator roller corresponding to the plate cylinder circumferential length value l. However, it is not always necessary to return to the origin position. By storing the position of the compensator roller before register registration in the arithmetic and control unit 2 and calculating the distance from the appropriate position of the compensator roller corresponding to the plate cylinder circumference value l, the compensator roller can be directly moved to the appropriate position. You may move it.

〔The invention's effect〕

As described above, in the present invention, the initial registration, that is, the adjustment of the vertical registration of the printed matter performed prior to the actual printing can be completed in a short time and accurately only by inputting the plate cylinder circumference value, and the work load is reduced. Can be suppressed. Further, the efficiency of the printing press can be greatly improved, and the printing sheet used for the trial printing is not required, so that the material cost can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a register preset device of the present invention, FIG. 2 is a configuration diagram showing an embodiment of the arithmetic and control unit 2 shown in FIG. 1, and FIG. FIG. 4 is an explanatory diagram showing another embodiment of the arithmetic and control unit 2 shown in FIG. 4, FIG. 4 is a schematic diagram of a printing unit of a printing press capable of performing vertical registration only by moving a compensator roller, and FIG. 5 is a conventional vertical registration of printed matter. FIG. 5 is an explanatory diagram showing a state of a printed matter obtained by test printing in the adjustment method of FIG. DESCRIPTION OF SYMBOLS 1 ... Input device 2 ... Operation control device 3 ... Compensator roller drive circuit 4 ... Motor 5 ... Rotary encoder 15 ... Lead screw 30 ... Table 51, 52, 53 ... Plate cylinder 54, 55, 56 ... impression cylinders 61, 62 ... compensator roller 70 ... guide roller W ... sheet

Claims (3)

(57) [Claims] 1. A printing press for adjusting a vertical register of a printed material by adjusting a position of a compensator roller disposed between printing units to change a web path value between the printing units based on a plate cylinder circumference value. A register preset device that automatically performs initial registration, based on an input device for inputting a plate cylinder circumference value and a plate cylinder circumference value input from the input device. An arithmetic and control unit that derives an appropriate position of the compensator roller where the web path value is an integral multiple of the plate cylinder circumference value,
A moving device for moving the compensator roller to the appropriate position in accordance with the output from the arithmetic and control unit. The arithmetic and control unit further comprises a compensator based on the plate cylinder circumference input from the input device. A first arithmetic circuit for calculating an initial value of the web path when the roller is at the home position, and a compensator based on the perimeter of the plate cylinder input from the input device and the initial value of the web path calculated from the first arithmetic circuit A register calculating device for calculating a proper position of the roller. 2. The register preset device according to claim 1, wherein said first arithmetic circuit includes a function for calculating an initial value of a web path using a plate cylinder circumference value as a variable. . 3. A printing press for adjusting a vertical register of a printed material by changing a web path value between printing units by adjusting a position of a compensator roller disposed between the printing units, based on a plate cylinder circumference value. A register preset device that automatically performs initial registration, based on an input device for inputting a plate cylinder circumference value and a plate cylinder circumference value input from the input device. An arithmetic and control unit that derives an appropriate position of the compensator roller where the web path value is an integral multiple of the plate cylinder circumference value,
A moving device for moving the compensator roller to the appropriate position in accordance with the output from the arithmetic and control unit. The arithmetic and control unit further comprises a plate cylinder circumference value and a corresponding position of the compensator roller corresponding thereto. A register preset device comprising a table defining a combination with the data.