JPH0238253A - Taking-up diameter detecting device - Google Patents

Abstract

PURPOSE:To correctly detect the taking-up diameter of a taking-up roll by inserting a connecting bar which is installed in parallel to the axis line of a taking-up roll onto a taking-up roll holding body, into a slot hole on a bracket installed onto a supporting body. CONSTITUTION:A connecting bar 15 installed onto a taking-up roll holding body 18 is inserted into a slot hole 13 on a bracket 14 installed onto the supporting body 11 of a taking-up diameter detecting head 12. Therefore, the error vibration in the shift in the slot hole 13 direction of the taking-up roll holding body 18 and the shift in the axis center direction of a taking-up roll 2 can be absorbed, and the taking-up diameter detecting head 12 shifts, following only the shift of the taking-up roll holding body 8 in the increase direction of the diameter of the taking-up roll 2. Therefore, the taking-up diameter of the taking-up roll 2 can be detected correctly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for detecting the winding diameter of a winding roll in a winding device such as a paper web.

[Prior art] In order to obtain a winding roll with uniform hardness, it is necessary to control the nip pressure and the tension of the paper web during the winding process according to the size of the winding diameter. The winding diameter must be accurately detected.

Furthermore, when unloading the winding roll, it is necessary to accurately detect the winding diameter in order to perform the work reliably and safely.

In conventional winding diameter detection devices, a detection head is fixed directly to a winding roll holder, and as the diameter of the winding roll increases, the winding roll holder moves on a support frame, and the winding roll holder moves on a support frame. Since the detection head fixed to the roller moves, the amount of movement is read by a winding diameter detection scale attached to the support frame.

[Problems to be Solved by the Invention] In the above-mentioned device, it is good when the take-up roll is close to a cylinder, but if the take-up roll becomes eccentric due to unevenness in the thickness of the paper or distortion of the core, the balance of the take-up roll may be affected. When it collapses and generates vibrations, which are transmitted to the take-up roll holder, the vibrations are directly transmitted to the detection head, resulting in measurement errors.

An object of the present invention is to accurately detect the winding diameter without transmitting vibrations in the vertical direction, axial direction, etc. of the winding roll and without measurement errors.

[Means for Solving the Problems] The present invention provides a winding roll holder that is movable in a direction perpendicular to the axis of a winding drum, and a winding roll holder that is arranged so as to be movable in a direction perpendicular to the axis of the winding drum. A winding diameter detection scale and a rail are provided, a support body having a winding diameter detection head is movably provided on the rail, and a bracket having a long hole in a direction perpendicular to the moving direction of the support body is attached to the support body. The winding diameter detecting device is characterized in that a connecting bar attached to the winding roll holder in parallel with the axis of the winding roll is inserted into a long hole of the bracket.

[Operation] In the elongated hole of the bracket provided on the support of the detection head,
Since the connecting bar attached to the take-up roll holder is inserted, error vibrations such as movement in the long hole direction of the take-up roll holder and movement in the axial direction of the take-up roll are absorbed, and the take-up roll The take-up diameter detection head moves to follow only the movement of the take-up roll holder in the direction of increasing the diameter of the take-up roll, making it possible to accurately detect the take-up diameter.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention, in which winding rolls 2 are arranged in a staggered manner on both sides of a winding drum 1. That is, the support frames 3 are pivoted by the pins 4 so as to be able to rotate in parallel in a vertical plane at intervals equal to or larger than the width of the take-up roll 2, and the hydraulic cylinders 5 pivoted below the support frames 3. The piston rod 6 is attached to the support frame 3
A pin 7 is connected to the lower side of the piston rod 6, so that the support frame 3 can be rotated by protruding and retracting the piston rod 6.

A take-up roll holder 8 having a chuck device is disposed on the support frame 3 so as to be movable over substantially the entire length in the longitudinal direction.

Furthermore, a winding diameter detection device is provided in the longitudinal direction of the side surface of the support frame 3 to detect the diameter of the winding roll 2 in a non-contact manner using a magnetic or optical sensor.

Regarding the winding diameter detection device, a winding diameter detection scale 9 is fixed to the support frame 3 in the moving direction of the winding roll holder 8, and a rail 10 is laid in parallel to the scale 9.

A support 11 is movably provided on the rail 10, a detection head 12 is provided on the support 11, and a bracket 14 having a long hole 13 is attached to this.

On the other hand, a connecting bar 15 is attached to the take-up roll holder 8 in parallel to the axis of the take-up roll 2, and the connecting bar 15 is inserted into the elongated hole 13 of the bracket I4.

The direction of the elongated hole 13 is perpendicular to the moving direction of the take-up roll holder 8, and as shown in FIG. The length of is determined by considering the expected magnitude of vertical vibration of the roll. Therefore, the elongated hole 13 and the connecting bar 15 are brought into contact with each other through a line contact, preferably a point contact.

The operation will be explained below.

After the paper web enters the winding drum 1, it is wound onto each winding roll 2.

As the paper web is wound up, the diameter of the winding roll 2 increases,
Accordingly, the take-up roll holder 8 moves linearly outward.

The connecting bar 15 fixed to the take-up roll holder 8 is inserted into the elongated hole 13 of the bracket 14 attached to the detection head 12, so that the detection head 12 is integrated with the take-up roll holder 8 in the running direction. It moves on the rail 1o by the support body 11.

Furthermore, vibrations of the take-up roll 2 in the vertical and axial directions during winding are absorbed by the elongated hole 13 and are not transmitted to the detection head 12, but only in the direction of increase in the diameter of the take-up roll 2. The detection head 12 moves and the winding diameter detection scale 9
This makes it possible to accurately detect the winding diameter of the winding roll 2.

Therefore, the nip pressure applied to the winding roll 2 can be optimally adjusted according to the detected winding diameter, and a desired winding hardness can be achieved.

It should be noted that the winding diameter detection device of the present invention is not limited to the above-described embodiments, but can also be applied to detecting the winding diameter of a winding roll of rubber, plastic film, etc. Of course, various changes may be made without departing from the spirit of the invention.

[Effects of the Invention] As explained above, according to the winding diameter detection device of the present invention, since the connecting bar is inserted into the long hole, during the winding operation,
Vibrations that would cause measurement errors in the vertical direction or in the axial direction in the take-up roll holder, where most vibrations occur, are not directly transmitted to the detection head.

Therefore, it is possible to accurately detect the winding diameter and apply the optimum nip pressure according to the winding diameter of the winding roll, making it possible to obtain a winding roll with the desired winding hardness. In addition, various excellent effects can be achieved, such as the ability to reliably and safely unload and unload the winding roll.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of one embodiment of the present invention, Fig. 2 is a view taken in the direction of the arrows ■-■ in Fig. 1, and Fig. 3 is an explanatory diagram showing the state of connection between the long hole of the bracket and the connecting bar. . 1 is a winding drum, 2 is a winding roll, 3 is a support frame,
8 is a winding roll holder, 9 is a winding diameter detection scale, 10
11 is a rail, 11 is a support, 12 is a detection head, 13 is a long hole, 14 is a bracket, and 15 is a connecting bar.

Claims (1)

[Claims] 1) A take-up roll holder is disposed so as to be able to run in a direction perpendicular to the axis of the take-up drum, and a take-up diameter detection scale and rail are provided in a direction parallel to the running direction of the take-up roll holder, respectively. A support body having a winding diameter detection head is movably provided on the rail, a bracket having a long hole in a direction perpendicular to the moving direction of the support body is attached to the support body, and the winding is carried out on the winding roll holder. A winding diameter detection device characterized in that a connecting bar attached parallel to the axis of the roll is inserted into a long hole of the bracket.