JPH0464978B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention has a winding frame at each end of a turret arm, and is capable of winding up sheet materials one after another without stopping the line. The present invention relates to a turret winding machine that can perform winding, and particularly to a turret speed control device suitable for winding up pressure-sensitive printing sheet materials.

(Prior Art) FIG. 6 is a schematic diagram of a conventional turret winding machine of this type. In the figure, a sheet material 1 is fed by a feed roll 3, is pressed by a rider roll 11, and is wound onto a winding frame 2. The winding frame 2 is attached to each end of a turret arm 7 that is rotatably supported around a rotation axis C ₁ , and rotates on a rotation axis C ₂ parallel to the rotation axis C ₁ of the turret arm 7 . It's getting old.

In this case, the winding frame 2 is connected to the winding frame drive motor 5.
Accordingly, the turret arms 7 are each driven by the turret motors 8, but while the sheet material 1 is being wound up, the turret motors 8 are stopped.
The turret arm 7 is held in the state shown.
Then, when a predetermined amount of the sheet material 1 has been wound onto the winding frame 2, the turret motor 8 rotates the turret arm 7 by 180 degrees to start winding on another winding frame 2. As a result, the sheet material 1 can be continuously wound up without stopping the line.

In order to perform such control, a pulse oscillator 4 is attached to the feed roll 3, a pulse oscillator 6 is attached to the winding frame drive motor 5, and a coil diameter calculator 1 is attached to the winding frame drive motor 5.
0 counts these output pulses and calculates the coil diameter during winding based on the feed amount of the sheet material 1 and the rotation speed of the winding frame 2. And take-up frame 2
When the winding coil diameter reaches a set value, the speed reference generator 12 generates a speed reference for rotating the turret arm 7. On the other hand, a pulse oscillator 9 for speed detection is attached to the turret motor 8, and a speed control device 13 is connected to the speed reference generator 1.
The speed of the turret motor 8 is controlled so that the speed reference No. 2 and the detected speed corresponding to the number of output pulses of the pulse oscillator 9 match.

With the above configuration, when winding up a sheet material such as paper or film, the rider roll 11 presses the winding coil while winding it to prevent winding misalignment or wrinkles.

However, if the sheet material to be wound is of a pressure-sensitive printing type, such as carbon paper, if it is pressed with the rider roll 11, it will develop color and impair product quality. For this reason, as shown in the figure, the rider roll 11 is fixed at a position slightly apart from the winding frame and serves as a presser roll to wind up the sheet material 1.

(Problem to be Solved by the Invention) As described above, when winding up the pressure-sensitive printing sheet material 1 using a turret winding machine, the rider roll 11 is fixed at a position slightly apart from the winding frame. By acting as a presser roll, the occurrence of winding misalignment and wrinkles is prevented, but as the diameter of the winding coil increases, the distance between the rider roll and the winding coil becomes narrower, making it difficult for them to come into contact with each other. be. However, if the rider roll is fixed at a position where there is no risk of contact, there is a problem that when the diameter of the winding coil is small, the interval is too wide and winding misalignment, wrinkles, etc. are likely to occur.

This invention was made to solve the above problems, and when winding up pressure-sensitive printing sheet materials, etc., it is possible to prevent the occurrence of misalignment or wrinkles without impairing product quality. It is an object of the present invention to provide a turret speed control device that can prevent

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a turret arm that is rotatably supported integrally on one rotational axis, and each end of the turret arm is provided with an axis parallel to the rotational axis of the turret arm. The winding frame has a winding frame that rotates, and the sheet-shaped material to be wound is held down by rider rolls and wound onto the winding frame, and each time a predetermined amount is wound, it is wound up with another winding frame. , a turret winding machine that rotates the turret arm, a coil diameter calculator that calculates a coil diameter during winding based on the feed amount of the material to be wound and the rotational speed of the winding frame; and the rider. a first converter that converts the coil diameter to an angle reference of the turret arm so that the distance between the roll and the coil wound on the winding frame is substantially constant; a second converter that determines the rate of change over time of the output angle reference and converts it into the speed reference of the turret arm; Therefore, the present invention is characterized in that the rotational speed of the turret arm is controlled.

(Function) In this invention, the calculated coil diameter is converted into an angle reference of the turret arm so that the distance between the rider roll and the winding coil is approximately constant, and the time rate of change of this angle reference is further calculated. Since the speed standard of the turret arm is determined from , and the rotational speed of the turret arm is controlled according to this speed standard, the distance between the rider roll and the winding coil can be kept approximately constant even if the coil diameter increases. This makes it possible to wind the film without degrading the quality of the product and without causing any misalignment or wrinkles.

(Embodiment) FIG. 1 is a schematic diagram of an embodiment of the present invention, and the same reference numerals as in FIG. 6 indicate the same elements. Then, a new turret speed reference circuit 1 is added to the configuration shown in FIG.
The difference is that 9 has been added. This turret speed reference circuit 19 inputs the coil diameter signal from the coil diameter calculator 10, and adjusts the coil diameter so that the distance between the rider roll 11 and the coil wound on the winding frame 2 is approximately constant. A coil diameter/angle converter 14 converts the angle reference of the turret arm 7, and when the angle reference of the turret arm 7 changes, the amount of change per unit time is calculated, that is, the turret is differentiated with respect to time. An angle/velocity converter 15 that calculates the speed reference of the arm 7, an angle detector 16 that counts the output pulses of the pulse oscillator 9 and detects the actual rotation angle of the turret arm 7, and this angle detector 16. a speed deviation corrector 17 that calculates the deviation between the detected angle and the angle reference obtained by the coil diameter/angle converter 14 and outputs a speed reference correction amount; , an adder 20 that adds the angle/speed converter 15 and the speed reference; and an adder 20 that adds the speed reference to the angle/speed converter 15; The speed reference switch 18 applies the output of 20 to the speed control device 13.

The operation of the present embodiment configured as described above will be described below with reference to FIGS. 2 to 5, focusing on the portions in which new elements are added to the conventional device.

First, the speed control device 13 is connected to the speed reference generator 12.
turret arm 7 based on the speed standard of 180
Immediately after completing the rotation, the speed reference switch 18
is switched and the output of the adder 20 is applied to the speed control device 13, and in this state the sheet material 1 is wound onto the winding frame 2. At this time, coil diameter calculator 1
0 counts the output pulses of the pulse oscillators 4 and 6, and calculates the diameter of the coil wound on the winding frame 2 based on the counted value. The coil diameter/angle converter 14 converts this coil diameter into the turret arm 7.
Convert to angle standard. Figures 2 and 3 show an example of this calculation method, where the straight line connecting the rotation axis C ₁ of the turret arm 7 and the upper outer periphery of the winding coil 2a is used as a reference. The angle formed by the turret arm 7 is θ, the winding coil diameter at this time is D, and the rotation axis of the turret arm 7 is
If the distance between C ₁ and the rotation axis C ₂ of the winding frame 2 is L _T , a right triangle can be assumed here.
Therefore, the following relationship holds between these.

θ=Sin ⁻¹ (D/2/L _T )=Sin ⁻¹ (D/2L _T ) (1) The coil diameter/angle converter 14 calculates the angle reference θ using this equation (1). The angle/velocity converter 15 differentiates this angle reference with respect to time, thereby converting it into the amount of change in angle of the turret arm 7 per unit time, that is, the speed reference when rotating the turret arm 7. This speed reference is an adder 20,
It is applied via a speed reference switch 18 to a speed controller 13 which rotates the turret arm 7 as the sheet material 1 is wound up. At this time, the angle detector 16 counts the output pulses of the pulse oscillator 9 to detect the actual angle, and the speed deviation corrector 17 uses the angle reference of the coil diameter/angle converter 14 and the angle detection of the angle detector 16. A deviation from the value is determined, and a speed reference correction value corresponding to this deviation is calculated. This speed reference correction value is added to the speed reference of the angle/velocity converter 15 by an adder 20 and input to the speed control device 13. As a result, the rider roll 11 used as a presser roll,
Winding can be performed while keeping the distance K between the winding coil 2a and the winding coil 2a constant.

Next, when a predetermined amount of the sheet material 1 is wound onto the winding frame 2, the sheet material 1 is cut by a cutter (not shown), and at this point the speed reference switch 18 changes the speed of the speed reference generator 12. Standard speed control device 1
3, the turret arm 7 becomes
It is rotated 180 degrees and winding using another winding frame 2 is started.

4 and 5 show the relationship between the angle of the turret arm 7 and the diameter of the winding coil due to the operation of the turret speed reference circuit 19. Assuming that the distance between the outer periphery of the rider roll 1 and the outer periphery of the rider roll 11 is K, and even if the coil diameter gradually increases as the sheet material 1 is wound around the winding frame 2, Since the angle of the turret arm 7 can be changed, the distance between the outer periphery of the winding frame 2 and the outer periphery of the winding coil can be maintained at a constant value K.

In this way, when winding the sheet material 1 using the pressure-sensitive printing method, even if the rider roll 11 is used as a presser roll, flapping of the sheet material 1 can be suppressed, and good winding can be achieved without winding misalignment or winding wrinkles. I can do it.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the calculated coil diameter is converted to the angle reference of the turret arm so that the distance between the rider roll and the winding coil is approximately constant, moreover,
The speed standard of the turret arm is determined from the time rate of change of this angle standard, and the rotational speed of the turret arm is controlled according to this speed standard, so even if the coil diameter increases, the distance between the rider roll and the winding coil can be maintained. is maintained substantially constant, which has the effect of making it possible to wind the product without degrading the quality of the product, and without any misalignment or wrinkles.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment of the present invention, FIGS. 2 to 5 are explanatory diagrams for explaining the operation of the embodiment, and FIG. 6 is a schematic diagram of a conventional turret winding machine. It is. 2... Winding frame, 4, 6, 9... Pulse oscillator, 5... Winding frame drive motor, 7... Turret arm, 8... Turret motor, 10... Coil diameter calculator, 12... Speed reference generator, 13...
...Speed control device, 14...Coil diameter/angle converter, 15...Angle/speed converter, 16...Angle detector, 17...Speed deviation corrector, 18...Speed reference switch, 19... Turret speed reference circuit.

Claims (1)

[Claims] 1. A turret arm that is rotatably supported integrally on one rotational shaft has a winding frame at each end that rotates on an axis parallel to the rotational axis of the turret arm, and a sheet-like In a turret winding machine, the turret arm is rotated so that the material to be wound is wound onto the winding frame while being held by a rider roll, and the material is wound on another winding frame each time a predetermined amount is wound. , a coil diameter calculator that calculates a coil diameter during winding based on the feed amount of the material to be wound and the rotation speed of the winding frame; and a coil wound on the rider roll and the winding frame. a first converter that converts the coil diameter into an angular reference of the turret arm so that the interval between the two is approximately constant; and a second converter for converting the speed reference to the speed reference of the turret arm, and controlling the rotational speed of the turret arm according to the speed reference of the second converter during winding of the material to be wound. A turret speed control device featuring: