JPH0435324Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a winding machine rotation speed control device for keeping the winding machine rotation speed below the natural frequency of equipment.

[Prior Art] For example, in a paper winding machine, a carriage that holds and moves the core is disposed on a pair of support frames installed on both sides of the winding drum, and the core is moved by the carriage. The paper web is pressed against the winding drum, and the paper web is wound onto the core while being pressed against the winding drum by the core.

However, vibrations occur during winding due to causes such as an out-of-roundness of the core or an out-of-roundness or conical formation of the winding roll due to thickness or thinness of the paper web in the width direction. The support frame has low-order and high-order natural frequencies as shown in Figure 2, but the vibrations resonate at the low-order natural frequencies of the support frame, and large noise is generated due to mechanical vibration. At the same time, the contact point between the winding drum and the winding roll is shifted, and the quality of the winding roll product deteriorates, such as wrinkles in the paper web, uneven end faces due to movement in the width direction, and tension fluctuations.

For this reason, conventional methods have been to increase the mass of the support frame by filling it with concrete, etc., to increase its natural frequency, or to increase the force pressing the carriage against the running surface to attenuate vibrations through frictional force. .

[Problems to be solved by the invention] However, even if the vibrations are damped by increasing the rigidity of the support frame mentioned above or by increasing the frictional pressing force of the carriage, the resonance point will only shift, and sufficient effects will not be obtained. I couldn't help it.

Therefore, when resonance occurs due to an increase in the diameter of the take-up roll after the start of winding, the actual situation is that the rotation speed of the take-up drum is lowered and manual operation is continued at a constant speed.

Therefore, when a core with poor precision enters the line, winding time becomes longer and efficiency is lowered.

[Means for solving the problems] The purpose of the present invention is to solve the above-mentioned problems and shorten the winding time by adjusting the winding speed according to the increase in the winding diameter so as not to cause resonance. A rotation speed detector detects the rotation speed N of a winding drum whose rotational drive speed is variable; a winding roll diameter detector detects the winding roll diameter d of the winding roll; an arithmetic controller that calculates and controls the rotational speed N of the winding drum based on the natural frequency fz of the take-up machine, the drum diameter D of the winding drum, and the winding roll diameter d so that N<60fz/D・d; This invention relates to a rotational speed control device for a winding machine, characterized in that it consists of the following.

[Function] Natural frequency of the winder specified at the time of installation of the winder
fz, the drum diameter D of the winding drum used, and the winding roll diameter d detected by the winding roll diameter detector, the arithmetic controller calculates N such that N<60fz/D・d. The drum is driven so that the number of rotations is N.

Therefore, as the diameter of the winding roll increases, the winding drum is operated at a maximum speed below the natural frequency of the winding machine, and the winding drum is switched to normal operation and the winding is completed in a short time.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows an embodiment of the present invention, in which a rotational speed detector 3 is connected to a rotational drive motor 2 of a winding drum 1 having a diameter D.
is provided, and the rotational speed of the motor, that is, the drum rotational speed N detected by the detector 3 is sent to the arithmetic controller 4.

A carriage 7 for holding the core 6 is movably disposed on a pair of support frames 5, and a winding roll diameter detector 9 detects the winding roll diameter d of the winding roll 8 in the longitudinal direction of one of the support frames 5. The winding roll diameter d of the winding roll 8 sequentially detected by the detector 9 is sent to the arithmetic controller 4.

A natural frequency setting device 10 for setting and inputting the natural frequency fz of the support frame 5 measured in advance when installing the winding machine is connected to the arithmetic controller 4, and the drum diameter D of the winding drum 1 to be used is connected. A winding drum diameter setting device 11 is connected to set and input the winding drum diameter, and the upper limit rotation at the winding roll diameter d is determined using the input values fz, d, and D to the arithmetic controller 4 using the formula N _H <60fz/D・d. number
Calculate N _H and compare it with the drum rotation speed N.
The rotational speed of the rotary drive motor 2 is controlled so that < _NH .

With the above structure, a web of paper cut to a desired width is wound and fixed around the core 6 supported by the carriage 7, and the core 6 is wound while applying a pressing force to the winding drum 1 by the carriage 7. The take-up drum 1 is rotationally driven by a rotary drive motor 2.

The speed of the rotary drive motor 2 is gradually increased by the arithmetic controller 4, but the winding roll diameter d of the winding roll 8 is detected by the winding roll diameter detector 9, and the arithmetic controller 4
is output to.

The natural frequency fz of the support frame 5 measured in advance at the time of installation is inputted to the arithmetic controller 4 by the natural frequency setting device 10 as shown in FIG. 2, and the winding drum diameter setting device 11, the diameter D of the winding drum 1 to be used is input, so together with the winding roll diameter d, the upper limit rotation speed can be determined by the above formula.
N _H is calculated. The N _H and the drum rotation speed N detected by the rotation speed detector 3 are successively compared as the winding roll diameter d increases, and the rotation drive motor 2 is driven so that N<N _H.

Therefore, winding is continued at the maximum winding speed within the range where the frequency of the support frame 5 is equal to or less than the natural frequency of the support frame 5, and when a constant steady winding speed is reached, constant speed winding is started. The winding roll is decelerated and stopped when the diameter of the winding roll reaches a predetermined diameter.

The above operation is performed automatically, but since the above operation is not necessary with a core of normal precision, a vibration detector is installed in the support frame 5, and when vibration exceeding a certain level is detected, the above operation is automatically performed. It may also be possible to switch to driving mode.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but the calculation formula may be multiplied by a safety factor of k, or a margin of _N0 may be given to N<K.60fz/D.d or N<60fz. Of course, various changes such as /D·d+N ₀ can be made without departing from the gist of the present invention.

[Effects of the invention] As described above, according to the rotation speed control device of the winder of the present invention, the diameter of the winding roll is sequentially detected, and the natural frequency fz of the winder and the drum diameter D of the winding drum are adjusted. Calculate the upper limit rotation speed for the relevant roll diameter from
The rotation speed of the winding drum is detected by a rotation speed detector, and the winding drum is driven to rotate within the upper limit rotation speed, so the winding time is significantly shortened regardless of the accuracy of the core. Various excellent effects can be achieved, such as being able to prevent deterioration in quality due to wrinkles in the take-up roll, uneven end surfaces, tension fluctuations, and the like.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the apparatus of the present invention, and FIG. 2 is a diagram showing the relationship between the winding roll diameter and the winding speed using the apparatus of the present invention. 1 is a winding drum, 2 is a rotary drive motor, 3 is a rotation speed detector, 4 is an arithmetic controller, 5 is a support frame, 8 is a winding roll, 9 is a winding roll diameter detector, 1
0 indicates a natural frequency setting device, and 11 indicates a winding drum diameter setting device.

Claims (1)

[Claims for Utility Model Registration] A rotational speed detector for detecting the rotational speed N of a winding drum whose rotational drive speed is variable, a winding roll diameter detector for detecting a winding roll diameter d of a winding roll, and said rotational speed. N
and the natural frequency fz of the winding machine, the drum diameter D of the winding drum, and the winding roll diameter d, calculating and controlling the rotational speed N of the winding drum so that N<60fz/D・d. 1. A winding machine rotation speed control device comprising: