JP2516644Y2 - Automatic paper roll loading device for rotary printing press - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a web automatic loading device for a rotary printing press, which seeks the center of a web and mounts the web on a mounting arm arranged at a loading station.

[Prior Art] In a rotary printing press, two or three mounting arms are each equipped with roll paper called a roll paper, and when one roll of paper is finished, the roll of paper mounted on the next mount arm is automatically transferred to the printing unit. Continuous operation is performed by supplying. on the other hand,
After removing the core of the mounting arm after winding the paper,
A new paper roll will be loaded automatically.

For mounting the paper roll, for example, as shown in FIG. 3, the paper roll 1 is placed on a carriage 102 equipped with an elevator 101, transported to a position below the mounting arm 2, and the paper roll 1 is lifted and mounted. An automatic web-paper loading device, or as shown in FIG. 4, a web 1 is placed on a truck 103 and a truck 1 is mounted on an elevator 104 provided below the mounting arm 2.
This is performed by using the automatic paper roll loading device in which 03 is arranged and the web 1 is lifted together with the truck 103 to be mounted on the mounting arm 2.

In any of the automatic paper roll loading devices, the central portion of the paper roll (that is, the core portion) must be positioned coaxially with the web center 2a of the mounting arm at the time of loading, and therefore the central position of the paper roll needs to be detected. is there.

Therefore, conventionally, as shown in FIG. 3, two pairs of light emitters / receivers 105, 106 are arranged so as to be line-symmetric with respect to a vertical line passing through the same height position as the web center 2a of the mounting arm 2. Then, the position of the central portion (core) of the paper roll 1 is determined by detecting when the oblique upper and lower edges of the paper web 1 that have been conveyed block the optical paths of these light emitters / receivers 105, 106, and the web center 2a A means for positioning between them has been adopted (see Japanese Patent Laid-Open No. 55-93755).

Further, in the prior art of FIG. 4, the mounting arm 2
The photoelectric sensor 107 is provided at the same height as the web center 2a of the web center 2a. The center of the web 1 is detected by the photoelectric sensor 107 receiving the received light (see Japanese Patent Laid-Open No. 61-291353).

[Problems to be Solved by the Invention] Since all of the above-described conventional paper roll center position detecting means use the photoelectric sensor, there is a possibility that the light receiving sensitivity may be lowered due to dust or the like to cause an erroneous detection. In particular, a large amount of dust is scattered around the rotary printing press, and in order to prevent erroneous detection under such an environment, it is necessary to frequently perform maintenance such as cleaning of the photoelectric sensor, which is complicated.

Further, in the former paper roll center position detecting means,
Due to the complicated structure such as arranging the light emitters / receivers 105, 106 in a crossed manner, the manufacturing cost is high and the adjustment is troublesome.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an automatic web-feeding device for a rotary printing press having a simple structure, which is not affected by dust and is easy to maintain.

[Means for Solving the Problem] In order to achieve the above object, the present invention conveys a web to a position below a web mounting arm provided on a rotary printing press, and lifts the web to the mounting arm. In the automatic winding paper mounting device to be mounted, an ultrasonic detector for detecting the upper end position of the winding paper placed on the device, and the height direction of the upper end of the winding paper based on the detection signal output from the ultrasonic detector. A means for calculating the position, a means for calculating the center height of the paper roll based on the position in the height direction of the upper end calculated by this means, and the position in the height direction for the lower end of the paper roll previously measured, and this means Means for raising the center of the paper roll to a height coaxial with the web center of the mounting arm based on the center position of the paper roll.

[Operation] The automatic winding paper mounting device having the above-described configuration obtains the center of the winding paper and positions the center coaxially with the web center, and then automatically mounts the winding paper on the mounting arm.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram for explaining the principle of the paper roll center detection device used in this embodiment, and FIG. 2 is a block diagram showing the configuration of the device.

First, an outline of an automatic web-winding device for a web-fed printing press to which the web-center detection device is applied will be described.

In FIG. 1, reference numeral 3 is a traverser that moves on a track 4 provided on the floor surface, and a lifter 5 that moves up and down is provided on the upper surface of the traverser 3. Furthermore, lifter 5
A truck 7 is arranged on the upper table 6 so as to be slidable in a direction perpendicular to the plane of the drawing, and the web 1 is placed on the upper surface of the truck 7.

The web 1 placed on the truck 7 is arranged below the mounting arm 2 at the web mounting station S by the horizontal movement of the traverser 3. Then, it is lifted by the lifter 5 and placed in a state of being axially aligned with the mounting arm 2, and the web core 2a of the mounting arm 2 is engaged with the winding core 1a to complete the mounting.

In order to accurately perform the above-described operation of mounting the paper roll,
It is necessary to detect the center of the web 1 and position it coaxially with the web center 2a of the mounting arm 2. Therefore, the paper roll center detection device is provided in the paper roll automatic mounting device.

This paper roll center detection device detects the center of the paper roll based on the following principle.

That is, as shown in FIG. 1, the ultrasonic detector 11 is installed at a predetermined height position above the web center 2a in the mounting arm 2. Then, the ultrasonic detector 11 detects the upper end 1b of the web 1 that has been conveyed to a position below the ultrasonic detector 11 as the traverser 3 moves. That is, the distance from the ultrasonic detector 11 to the upper end 1b of the web 1 is M, and this M is detected by the ultrasonic detector 11. Here, if the distance from the ultrasonic detector 11 to the lower end 1c of the web 1 is L, then the diameter N of the web 1 is N = LM. Since L is always a constant value, it is measured in advance.

If N is known in this way, the distance R from the lower end 1c of the web 1 to the center 1a can be calculated by R = N / 2. When the center 1a of the web 1 is obtained, the distance between the center 1a and the web center 2a, that is, the amount Q of the lifter 5 to be raised can be calculated by Q = P−R = P−N / 2. Note that P is the distance from the lower end 1c of the web 1 to the web center 2a, and is always a constant value.
Measure in advance.

Next, the configuration and operation of the automatic paper winding device based on the above-described principle will be described with reference to FIG.

In the figure, reference numeral 12 is a start-up circuit, and when a start-up signal is output from the circuit, the start-up signal is input to the AND circuit 14 via the one-shot circuit 13. At the same time, the signal from the one-shot circuit 13 is input to the set terminal of the flip-flop circuit 15, and the synchronization signal of the ultrasonic detector 11 is output from the circuit. As a result, the ultrasonic detector 11 starts measurement and outputs a detection signal. Since the detection signal is an analog signal, it is converted into a digital signal by the A / D converter 16 and output to the AND circuit 14.

The AND circuit 14 operates by the signals from the one-shot circuit 13 and the A / D converter 16, and outputs a detection signal to the BCD decoder 17. The BCD decoder 17 converts the detection signal into decimal data. This converted data becomes data M indicating the distance from the ultrasonic detector 11 to the upper end 1b of the web 1.

The conversion data M from the BCD decoder 17 is input to the subtractor 18, and is subtracted from the “data L indicating the distance from the ultrasonic detector 11 to the lower end 1c of the web 1” which is measured in advance and input to the setting circuit 19. To be As a result, the subtractor 18 outputs the diameter data N of the web 1.

This diameter data N is input to the arithmetic circuit 28, where ¹ /
₂ data, that is, the distance R (= N / 2) from the lower end 1c of the web 1 to the center 1a.

The data R is input to the subtractor 20. In the subtractor 20,
The “paper roll 1” that has been measured in advance and input to the setting circuit 21
The data R is subtracted from the distance P "from the lower end 1c to the web center 2a, and the data Q indicating the amount to be lifted by the lifter 5 is output.

Output data M from BCD decoder 17 and subtractor 2 described above
The data Q from 0 is input to the subtractor 22, where the data Q is subtracted from the output data M to calculate S. The strobe signal output at this time is the flip-flop circuit.
Input to the set terminal of 23.
The lifter drive signal is output from 23, and the lifter 5 starts rising.

Further, the data S is the one input terminal B of the comparison circuit 24.
Is input to The detection signal from the ultrasonic detector 11 is input to the other input terminal A of the circuit 24 via the AND circuit 14 and the BCD decoder 26. The AND circuit 25 outputs by the logical product of the output of the flip-flop circuit 27 operated by the input of the data S and the detection signal from the ultrasonic detector 11.

The comparator circuit 24 compares the respective inputs, and when the detection signal of the ultrasonic detector 11 becomes equal to the data S, outputs a signal to the reset terminals of the flip-flop circuits 15, 23, 27, and the respective circuits 1
Close 5,23,27. As a result, the lifting operation of the lifter 5 is stopped, and at the same time, the ultrasonic detector 11 also ends the measurement operation.

The present invention is not limited to the above-described embodiments, and various modifications can be made without changing the gist. For example, the installation location of the ultrasonic detector 11 is not limited to above the web center 2a, but may be set above an arbitrary position on the track 4 of the traverser 3. However, in this case, since the change of the data M due to the rise of the lifter 5 cannot be detected, the data Q is input to the drive circuit of the lifter 5,
The lifter 5 is controlled so as to stop when the distance of the data Q is increased.

[Advantages of the Invention] As described above, the automatic paper roll mounting apparatus of the present invention calculates the center position of the paper roll based on the detection signal of the ultrasonic detector, and therefore is not affected by dust. Further, since the web is raised based on the obtained center position data, the center of the web can be reliably positioned coaxially with the web center.

[Brief description of drawings]

FIG. 1 is a diagram for explaining the principle of the paper roll center detection device of this embodiment, and FIG. 2 is a block diagram showing the configuration of the device.
3 and 4 are front views showing a conventional example. 1: Paper roll, 2: Mounting arm 3: Traverser, 4: Trajectory 5: Lifter, 7: Truck 11: Ultrasonic detector, 12: Start circuit 13: One-shot circuit 14, 25: AND circuit 15, 23, 27: Flip-flop circuit 16: A / D converter 17: BCD decoder 18: Subtractor, 19: Setting circuit 20: Subtractor, 21: Setting circuit 22: Subtractor, 24: Comparison circuit 26: BCD decoder

Claims (1)

(57) [Scope of utility model registration request] 1. An automatic winding paper loading device for transporting a winding paper to a position below a winding paper picking arm provided on a rotary printing machine, and lifting the winding paper to mount it on the mounting arm. An ultrasonic detector for detecting the upper end position of the paper roll, a means for calculating the position in the height direction of the upper end of the paper roll based on the detection signal output from the ultrasonic detector, and a height of the upper end calculated by this means. Means for calculating the center height of the paper roll based on the position in the vertical direction and the position in the height direction of the lower end of the paper web measured in advance, and based on the center position of the paper roll calculated by this means,
An automatic web loading device for a rotary printing press, comprising means for raising the center of the web to a height coaxial with the web center of the mounting arm.