JP2002225234A - Continuous printing device for strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous printing device for a strip that makes an adjustment of scale accuracy and phase matching easier and ensures improvement of high accuracy, high rate of operation and high yield. SOLUTION: The continuous printing device for a strip has a plate cylinder and an impression cylinder and prints continuously one kind or two or more kinds of scale, numerical value, sign and pattern on the surface and/or back side of the strip between the cylinders, and the plate cylinder and the impression cylinder are respectively equipped with independent rotational driving means which adjust revolving speed independently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, a method in which a quenched steel strip or a fiber strip is subjected to a base treatment with a paint or a resin.
The present invention relates to a continuous printing apparatus for printing a band-like material such as a tape measure of a length gauge for printing scales, numerals, marks, patterns, and the like on the front surface or the front and back.

[0002]

2. Description of the Related Art Scales, numerals, signs, patterns, and the like are formed on the surface of a strip such as a hardened steel strip or a fiber strip tape having hardness, elasticity, and cross-sectional shape (flat, U-shaped, or V-shaped). In printing, for example, in the case of a tape measure, in general, a rotary letterpress printing machine is mainly used in order to continuously print the repetition in units of the length of the tape measure.

FIG. 6 shows an example of a conventional rotary letterpress printing press. FIG. 6A is a front view thereof, and FIG.
It is the side view. This rotary press has a plate cylinder 61 provided with a black plate 62 for printing scales and a red plate 63 for printing red numerals and the like in parallel on its outer peripheral surface. Printing pressure rollers 65 </ b> A and 65 </ b> B are provided correspondingly to press and print the tape T against the tape 63, and a feed cylinder 73 that feeds the tape T at a constant speed by a frictional force with the tape T is provided. Further, a dancer roll 72 is provided before and after the plate cylinder 61, and the weight 6
7 and 68, a constant tension is applied to the tape T to improve the adhesion between the tape T and the plate cylinder 61 or the feed cylinder 73, and to feed the tape at a constant speed, for example, to eliminate variations in the scale width. I have to. Incidentally, reference numeral 64 denotes a red shift adjusting roller for adjusting the shift of a red number with respect to the black scale, 66 denotes a dryer, 69 denotes a driving device for the plate cylinder 61 and the feed cylinder 73, and 74 denotes a black plate 62 and a red plate 63. An ink roller that supplies ink to the
Reference numeral 71 denotes a black plate 62 and a red plate 63 for the printing pressure rollers 65A and 65B.
This is a printing pressure cylinder that applies pressure in the direction of.

In a conventional printing press of this type, in order to obtain a predetermined graduation accuracy, the diameter and deflection of the plate cylinder 61, the assembly parallelism of each cylinder, and the tape, which are factors related to the graduation accuracy, are required. T
The characteristics of the tape, such as the tension of the tape, and the performance of the differential gear provided to rotate these at a constant speed ratio in the power transmission system from the rotary drive source of the feed cylinder 73 and the plate cylinder 61 must be considered. However, it is difficult to improve the graduation accuracy in consideration of all of these factors, and the actual adjustment of the graduation accuracy is performed by changing the outer peripheral speed ratio with the plate cylinder 61 by exchanging the feed cylinder 73 or changing the tape T by the dancer roll 72. This was done by adjusting the tension. In addition, the confirmation of the scale accuracy is performed by extracting a sample after the end of the trial printing and the tape lot or in the middle of the process, and checking it with a predetermined reference device.

Further, in general, a tape measure is usually printed in two colors (the scale is black and the number is red). For this phase adjustment, in the case of front side printing, the mounting position of the red shift adjusting roller 64 shown in FIG. That is, it is performed by adjusting the distance of the tape T between the contact point between the black plate 62 and the printing roller 65A and the contact point between the red plate 63 and the contact roller 65B. In particular, in the case of front and back printing, after printing the back side of the front side printing, copy both sides to a mirror and check the phase of the scale visually, and if necessary, adjust the mounting position of the red shift adjustment roller 64 in the vertical direction. By fine adjustment. As described above, conventionally, in this type of printing press, it is difficult to secure a predetermined graduation accuracy and perform adjustment for color matching. Operation rate was bad and had a significant impact on yields.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can easily adjust the graduation accuracy and the phase alignment, thereby improving the high accuracy, the high operation rate, and the yield. An object of the present invention is to provide a continuous printing apparatus for a web.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 has a plate cylinder and an impression cylinder, between which a front surface and / or a back surface of a belt-like material is provided. ,
In a continuous printing apparatus for a belt-like material that continuously prints one or two or more scales, numerical values, markers, patterns, and the like, separate rotation driving means are attached to the plate cylinder and the impression cylinder, respectively, and the number of rotations is independently set. It is characterized in that it is adjusted.

According to a second aspect of the present invention, in the continuous printing apparatus for a belt-shaped material according to the first aspect, the rotation driving means is a servo motor or a stepping motor.

According to a third aspect of the present invention, in the continuous printing apparatus for a belt-shaped material according to the first aspect, the plate cylinder and the impression cylinder are one impression cylinder and a scale plate provided on an outer periphery of the impression cylinder. It is characterized by comprising a cylinder and a red plate cylinder.

According to a fourth aspect of the present invention, in the continuous strip printing apparatus of the first aspect, a printing accuracy reading means for reading the printing accuracy of the printed strip is provided.
The printing accuracy data read by the means is transferred to the plate cylinder and / or
Alternatively, feedback is provided to print adjustment means for adjusting a print state such as the number of rotations of the impression cylinder and / or their mutual positions.

According to a fifth aspect of the present invention, in the continuous printing apparatus for a belt-shaped material according to the fourth aspect, the printing accuracy reading means comprises a camera and a reference device.

[0012]

FIG. 1 shows an embodiment of a tape measure printing press according to the continuous printing apparatus of the present invention. FIG. 1A is a front view. FIG. 1 (b) is a plan view of FIG. 1 (a).

A frame 16 of the continuous printing apparatus shown in FIG.
Attach frames 20, 21 that move back and forth on 8, 19,
The scale plate cylinder 5 for printing a black scale on one of the frames 20 is
The other frame 21 is provided with a red plate cylinder 6 for printing a red mark or the like, and between the scale plate cylinder 5 and the red plate cylinder 6,
The impression cylinder 4 is provided via a gantry 17 with a slight gap. Further, dancer rolls 32, 33 are provided on the carry-in side and carry-out side of the tape T to be printed of the machine body 16, respectively, and these dancer rolls 32, 33 are provided with weights 34, 35, respectively.
With the adjustment of 5, an appropriate tension is applied to the tape T conveyed. Further, a printing accuracy reading means for detecting the accuracy of the scale printed on the tape T is provided. This printing accuracy reading means includes two cameras 28 and 29 arranged before and after in the running direction of the tape T, a camera 30 arranged on one side of the camera 29 and a camera 30 arranged on the opposite side of the tape T, and a scale reference. .

The mounts 18 and 19 are mounted on rails (not shown) provided on the body 16 so as to be movable to the left and right as viewed in FIG. They are connected via a ball screw that makes the rotation reciprocate. Therefore, the gantry 18, 19
Is driven by the rotation of the servo motors 10 and 11
Reciprocating on the rails. The gap between the scale plate cylinder 5 and the impression cylinder 4 or the gap between the red plate cylinder 6 and the impression cylinder 4 is adjusted to optimize the printing pressure. Therefore, in order to obtain a desired print density or the like, it is possible to drive the servomotors 10 and 11 and move the gantry 18 or 19 to the left or right.

The frames 20, 21 are mounted on the frames 18, 19, respectively.
1 on a rail (not shown) provided in
It is mounted so as to be movable in a direction orthogonal to the movements of the motors 8 and 19, and is connected to a servomotor (not shown) mounted on the frames 18 and 19 via a ball screw for reciprocating rotation. For this reason, the gantry 20, 21
Are reciprocated on the frames 18 and 19 in a direction perpendicular to them, that is, in the front-rear direction with respect to the body 16 by the rotational drive of a servomotor (not shown), so that the scale plate cylinder 5 and the impression cylinder 4 or the red plate cylinder 6 When the impression cylinder 4 and the impression cylinder 4 are misaligned in the width direction, the servo motor is driven to move the scale plate cylinder 5 or the red plate cylinder 6 back and forth, and adjust the misalignment with the impression cylinder 4 in the width direction. The displacement in the width direction of the printing caused by the displacement can be corrected, and the optimum printing state can be obtained.

A mount 22 for supporting the drive shaft of the scale plate cylinder 5 and a mount 23 for supporting the drive shaft of the red plate cylinder 6 are provided on the mounts 20, 21 respectively. The center point 2 at the center in the width direction of the contact point between the plate cylinder 6 and the impression cylinder 4
It is movably mounted along an arc centered at 4, 25. Servo motors 12 and 13 are installed on the gantry 20 and 21, respectively.
Reference numerals 2 and 13 are connected to arms 26 and 27 attached to mounts 22 and 23, respectively, via ball screws that reciprocate rotation. Therefore, when the servo motors 12 and 13 are driven, the arms 26 and 27 are moved in the front-rear direction,
The gantry 22, 23 moves along the circular arc, and can be adjusted so as to equalize the contact pressure in the width direction between the scale plate cylinder 5 and the impression cylinder 4 or between the red plate cylinder 6 and the impression cylinder 4, and can be adjusted in the width direction. Printing uniformity can be eliminated and uniform printing can be achieved.

Further, an impression cylinder 4, a scale plate cylinder 5, and a red plate cylinder 6
Are mounted with servomotors 7, 8, and 9 as separate rotary driving means, and the impression cylinder 4, the scale plate cylinder 5, and the red plate cylinder 6 are driven independently of each other. By the way, the printing accuracy, that is, in the case of a tape measure, the accuracy of the scale is determined by the rotational speed ratio between the impression cylinder and the plate cylinder, so that the impression cylinder 4 and the scale plate cylinder 5 and the impression cylinder 4 When adjusting the rotational speed ratio with the red plate cylinder 6, the drive of each servomotor can be adjusted independently and independently, and the conventional impression cylinder 4 and the scale plate cylinder 5 and the impression cylinder 4 and the red The rotational speed ratio can be accurately and easily changed without causing any adjustment distortion due to gear backlash in the case where the plate cylinders 6 are linked via a differential gear or the like. As a result, the graduation accuracy can be improved.

In the drawing, reference numerals 1, 2, and 3 denote guide rollers, and a guide roller 1 guides the tape T to a printing section. Although not shown, a mechanism for supplying ink to the plate cylinder, which is not shown, is provided as in the conventional case. In addition, the gantry 18, 19, 20, 21, 22,
The movement servomotor 23 may be changed to a fluid actuator, and the scale plate cylinder 5 and the red plate cylinder 6 may be constituted by a plate cylinder composed of a pair of rollers and an endless belt stretched between them. good. Further, a tape T transport speed detector is attached at an appropriate position on the tape T transport path, for example, an encoder is attached to the guide roller 1, the tape T transport speed is detected, and the plate cylinder according to the speed is detected. It is also possible to add a mechanism for controlling the rotation speed. A drying device for drying the printed tape T is appropriately provided behind the dancer roll 33, near the reversing guide rollers 2, 3, and the like.

According to one embodiment of the present invention, a continuous printing apparatus comprises:
Since the tape T is configured as described above, first, the tape T passes through the dancer roll 32, is guided by the guide roller 1, and is conveyed between the scale plate cylinder 5 and the impression cylinder 4, where black scales are printed. Is transported between the red plate cylinder 6 and the impression cylinder 4,
There, a red sign or the like is printed. Then, the printed tape T is printed by the cameras 28 and 29 as printing accuracy reading means.
After passing through the installation location of the reference 30 and the reference device 31, whether or not the printing is correctly performed is detected by a method described later.

FIG. 2 is a block diagram showing a control circuit for controlling the printing accuracy of the printing press according to one embodiment of the present invention. In the figure, reference numeral 201 denotes a control unit composed of a CPU or the like, which is connected to cameras 28, 29, and 30 for reading the printing state of scales, markers, and the like printed on a tape measure tape, as well as an impression cylinder 4 and a scale plate cylinder. 5 and red plate cylinder 6 for driving servo motors 7, 8, 9 and mounts 18, 19, 2, respectively.
Servo motors 10, 1 for driving 0, 21, 22, 23
1, 14, 15, 12, 13 are servo amplifiers 70, 8
0, 90, 100, 110, 140, 150, 120,
130 are connected. The servo motor 1
Reference numerals 4 and 15 denote the aforementioned servo motors (not shown) for moving the gantry 20 and 21.

At the time of starting, a scale plate cylinder and a red plate cylinder corresponding to the type of product, for example, the type of tape measure, are selected and set on the printing press. At this time, the gantry 18, 19, 20, 21, 22, 22, and the position where the scale plate cylinder and the red plate cylinder can be optimally set so that printing by the scale plate cylinder and the red plate cylinder can be performed properly.
23, and in order to optimize the rotational speeds of the scale plate cylinder, the red plate cylinder and the impression cylinder, respective set values predetermined according to the type of plate cylinder are input to the control unit 201, and each servo motor Drive. If there is a problem with the set value at the time of starting, a minute adjustment is appropriately performed. Then, when printing is started, the scale of the tape T is scaled by the scale plate cylinder 5,
In addition, signs and the like are printed on the red plate cylinder 6, and the cameras 28, 29,
The printing state is detected by 30 and the reference unit 31. Next, control for maintaining or correcting an accurate printing state based on the detection result of the printing state will be described.

FIG. 3 is a flowchart for adjusting a predetermined graduation accuracy. FIG. 3A is a flowchart for adjusting the graduation accuracy in the case of table printing.
FIG. 3B is a diagram illustrating a flowchart for adjusting the graduation accuracy when performing back printing. First, a case where table printing is performed will be described with reference to FIG. At the time of front printing, the scales and / or markers of the running tape are read simultaneously with the reference device 31 by the cameras 28 and 29, and the read data is input to the control unit 201 (step 31). next,
The control unit 201 calculates the printing precision of the scale and / or the sign from the difference between the reference device 31 and the read data. A signal for correcting the rotation speed ratio of the cylinder 5 and / or the red plate cylinder 6 is output to the servo amplifier 80 and / or 90. The servo amplifiers 80 and / or 90 independently drive the servo motors 8 and / or 9 in response to the signals to change the rotation speed of the plate cylinders 5 and / or 6 independently. Therefore, the accuracy of the scale printed on the table is accurately corrected to the predetermined accuracy (step 32).

Next, the case of back printing will be described with reference to FIG. In the case of back printing, it is necessary to print at the same position as the scale printed on the front. Then, the cameras 29 and 30 simultaneously read the scales and the like at the same location printed on the front and back of the running tape T,
The read data is input to the control unit 201 (step 3
3). The control unit 201 calculates the accuracy of the scale and the like from the difference from the read data of the scales and the like read at the same time to determine whether there is a difference between the positions, and if there is the difference, the value becomes zero. A signal for correcting the rotational speed ratio of the plate cylinder 5 and / or 6 to the impression cylinder 4 is output to the servo amplifier 80 and / or 90. The servo amplifier 80 and / or 90 responds to the signal by the servo amplifier 8 and / or 90.
Or 9 is driven to independently change the rotation speed of the plate cylinders 5 and / or 6 (step 34). For this reason,
The accuracy of the scale printed on the back is precisely corrected to a predetermined accuracy. In the above description, the rotation speed of the plate cylinder 5 and / or 6 is changed. However, the rotation speed of the impression cylinder 4 is changed to change the speed of the tape T.
Those skilled in the art can appropriately change the method of adjusting the accuracy of the scale or the like printed on the front or back surface to the accuracy of a predetermined scale or the like within the technical idea described above.

In the case of a tape measure, a basic scale may be printed in black, and scales printed in parallel with the scale, scales arranged at regular intervals between the black scales, and numerical values corresponding to scales may be printed in red. In this case, the black printing and the red printing need to have the same phase. FIG. 4 is a flowchart showing an operation of adjusting the phases of black printing and red printing for front or back printing, and FIG. 4 (a) is a flowchart showing a flowchart of adjusting the phases of black printing and red printing for front printing. And FIG. 4 (b)
FIG. 9 is a flowchart illustrating a process of adjusting the phases of black printing and red printing to be printed on the back side. In FIG. 4A, the camera 28
Alternatively, a black scale printed in black at the zero reference point and a red print printed in between these black scales are read at any one of steps 29 and 29, and the read data is input to the control unit 201 (step 4).
1). Here, the zero reference point refers to the position of each scale zero at which printing is first started on the tape T. Control unit 2
01 calculates the phase difference between the red printing and the black printing based on the read data so that the phase difference becomes zero or a predetermined phase difference (when there is a predetermined phase difference at each zero reference point). A signal for changing the phase of the scale plate cylinder 5 and / or the red plate cylinder 6 is output to the servo amplifier 80 and / or 90. The servo amplifiers 80 and / or 90 respectively drive the servo motors 8 and / or 9 according to the signals to change the phases of the scale plate cylinders 5 and / or 6 independently. For this reason, the scale of black printing and red printing printed on the table,
The phase between the numbers and the like can be accurately matched.

In the case where the phases between the black printing and the red printing when the black printing and the red printing are performed on the back surface in the same manner as in the above-described front surface, the correction is performed in the step shown in FIG. That is, the camera 28 or 29 reads the black and red marks of the zero reference point printed on the back of the tape T, and the read data is input to the control unit 201. Since the following is clearly the same as the above-mentioned surface, it is omitted. It should be noted that the method of matching the phases of the black printing and the red printing printed on the front and back sides can be appropriately changed by those skilled in the art within the scope of the technical idea described above.

For example, when scales are printed on the front and back sides of a tape measure, the phases of printing on the front and back sides may be shifted.
In addition, when printing on the front and back sides shown in FIG. 3, even if the printing on the front and back sides is matched, the scale positions may be shifted and matched, that is, the printing may be performed with the phases of the front and back scales shifted. Therefore, it is necessary to match the phases.
FIG. 5 is a flowchart showing an operation for adjusting the phases of the scales printed on the front and back sides. First, the cameras 29 and 30 simultaneously read the same scale on the front and back sides printed on the tape T, and read the read data.
Enter 01. Next, the control unit 201 calculates a phase difference indicating a print shift between the scale printed on the front and the scale printed on the back based on the read data (step 51).
The control unit 201 outputs a signal for changing the phase of the plate cylinder 5 and / or the plate cylinder 6 to the servo amplifier 80 and / or 90 when the phase difference occurs as a result of the calculation.
The servo amplifiers 80 and / or 90 drive the servo motors 8 and / or 9 according to the signals to independently change the phase of the plate cylinders 5 and / or 6 (Step 5).
2). For this reason, the phase difference between the scales printed on the front and the back can be accurately matched. Further, the following method is effective for accurately adjusting the phases. That is, a reference hole (not shown) of the scale plate provided for pre-aligning the zero reference point before printing the back scale, and a black mark on the tape T immediately before the zero reference at the time of printing the front printed surface. This method is performed by matching the phases with. In this method, the position information of the reference hole of the scale plate and the black mark on the tape T is read by a sensor (not shown), and based on the position information, the scale plate cylinders 5 and / or 6 for the impression cylinder 4 are read.
The instantaneous correction of the phase difference can be achieved, and the accuracy of the front and back scale phase alignment can be more reliably improved. The method of adjusting the phase difference between the scales printed on the front and back sides can be appropriately changed by those skilled in the art within the scope of the technical idea described above. In addition, the camera 28, 29, and 30 detect the printing state of the front and back sides by using the cameras 28, 29, and 30 to determine whether printing shading, printing tape width direction deviation, and printing tape width direction shading have occurred, and the data is determined. It is sent to the control unit 201 and the gantry 1
8, 19, 20, 21, 22, and 23 can be moved and controlled to correct them. This specific method is apparent from each of the control methods described above, and will not be described.
Further, as described above, a control method for adjusting the predetermined scale accuracy, a control method for adjusting the phase of black printing and red printing for front and back printing, and a control method for adjusting the phase of the scale printed on front and back, and further, moving the gantry It is possible for a person skilled in the art to appropriately change the method of controlling the density of printing and the like by performing the method within the scope of the technical idea described above.

[0027]

As is apparent from the above description, since the plate cylinder and the impression cylinder are driven by independent drive sources, the plate cylinder and the impression cylinder are connected by a differential gear to adjust the rotational speed ratio. An excellent effect that the rotation speed ratio can be accurately controlled without any control trouble due to backlash, and it is not necessary to replace the impression cylinder in the same type of printing as in the past, and it is possible to achieve a predetermined graduation accuracy. To play. And
Since there is no drive system mechanical element such as a differential gear that connects each cylinder, an excellent effect is obtained in that the configuration is simple and independent drive. In addition, a printing accuracy reading means for reading the printing accuracy of the strip is provided, and the printing state such as the number of rotations of the plate cylinder and / or the impression cylinder and their mutual positions is adjusted based on the printing accuracy data read by the means. Since the configuration is such that feedback is provided to the adjustment means, adjustments for securing predetermined graduation accuracy and color matching are automatically performed, eliminating the need to confirm accuracy and perform color matching, which were conventionally performed manually. This has an excellent effect that the operation rate of the device is improved and the yield is significantly improved. Furthermore, since the graduation accuracy is automatically controlled, there is an excellent effect that the graduation accuracy is stabilized without being influenced by the tape characteristics such as the tape thickness and the coating thickness, which were difficult to manage conventionally.

[Brief description of the drawings]

FIG. 1 is an embodiment of a tape measure printing press according to the present invention. (a) is a front view of the printing press, and (b) is a plan view.

FIG. 2 is a block diagram of a control circuit for controlling the printing press according to the present invention.

FIG. 3 is a flowchart for adjusting a predetermined scale accuracy. (a) is a figure which showed the flowchart which adjusts the scale precision at the time of table printing. (B)
FIG. 4 is a diagram illustrating a flowchart for adjusting the scale accuracy when performing back printing.

FIG. 4 is a flowchart illustrating an operation of adjusting the phases of black printing and red printing for front and back printing. (a) is a diagram showing a flowchart for adjusting the phases of black printing and red printing to be printed on a table. (b) is a diagram showing a flowchart for adjusting the phases of black printing and red printing to be printed on the back.

FIG. 5 is a flowchart showing an operation for adjusting the phases of the scales printed on the front and back sides.

FIG. 6 is an example of a conventional rotary printing press that performs front and back printing. (a) is a front view. (B)
Is a side view.

[Explanation of symbols]

1, 2, 3 ... guide roller, 4 ... impression cylinder, 5 ... scale plate cylinder, 6
... Red plate cylinder, 7, 8, 9, 10, 11, 12, 13, 1
4, 15 servo motor, 16 machine body, 17, 18, 1
9, 20, 21, 22, 23 ... stand, 24, 25 ... center point between each plate cylinder and impression cylinder, 26, 27 ... arms, 28, 29, 3
0: Camera, 31: Reference device, 32, 33: Dancer roll, 34, 35: Weight, 201: Control unit, 70, 8
0, 90, 100, 110, 120, 130, 140,
150: Servo amplifier.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Tetsuya Yamamoto 1000-18 Oya, Okamotocho, Kusatsu-shi, Shiga F-term in KDS Shiga Plant (reference) 2C034 AB10 AB11 2C250 EA04 EA10 EA43 EB31 EB39

Claims (5)

[Claims] 1. A strip having a plate cylinder and an impression cylinder, between which a scale, a numerical value, a sign, a pattern or the like is continuously printed on the front and / or back side of the strip by one or more kinds. The continuous printing apparatus according to any one of claims 1 to 3, wherein separate rotation driving means are attached to the plate cylinder and the impression cylinder, respectively, and the number of rotations is adjusted independently. 2. An apparatus according to claim 1, wherein said rotation driving means is a servo motor or a stepping motor. 3. The continuity of a belt-shaped object according to claim 1, wherein the plate cylinder and the impression cylinder comprise one impression cylinder and a scale plate cylinder and a red plate cylinder provided on the outer periphery of the impression cylinder. Printing device. 4. A printing precision reading means for reading the printing precision of a printed strip, wherein the printing precision data read by the printing precision data is read by the number of rotations of the plate cylinder and / or the impression cylinder, and / or their mutual positions. 2. The continuous printing apparatus for a belt-like material according to claim 1, wherein feedback is provided to a print adjustment unit that adjusts a printing state such as the printing state. 5. An apparatus according to claim 4, wherein said printing accuracy reading means comprises a camera and a reference device.