JPH06115786A - Base paper feeder - Google Patents

Abstract

PURPOSE:To prevent slippage from occurring between a rolling center and roll-shaped base paper when the preset pressure of a hydraulic motor is too low, by increasing preset pressure temporarily. CONSTITUTION:Signals from two detectors of a rotation detector 5 which issues the rotational signal of a rolling center 1 which supports roll-shaped base paper 6 so as to rotate smoothly and a traveling detector which issues the traveling signal of the original paper 6 are compared with each other to be computed, and if an abnormal condition is detected in a rotating signal, it is judged that slippage is generated between the rolling center 1 and the roll-shaped original paper 6. Based on ihis judgment, the driving device of the rolling center 1 is switched to high pressure side temporarily to increase the tightening force of the roll-shaped original paper 6, thus preventing slippage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll-shaped raw paper supply device for a corrugating machine or the like.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a mill roll stand of a general conventional unwinding apparatus. As shown in the figure, the mill roll stand of the unwind device is
Main components include a main body stand 3, a pair of arms 2 and 2, an arm lifting device 7, a hydraulic motor 8 for opening and closing the arms, rolling centers 1 and 1, other operating devices (not shown), a control device, a drive device for each part, etc. Has been done. More specifically, referring to FIG. 3 and FIG. 4, the rolling center 1, 1 is attached to the tip of the arm 2, 2 with respect to the main body stand 3 fixedly installed at a predetermined position on the floor of the corrugated board sheet production line. While holding and sliding the arms 2 and 2 in the left-right direction via the screw rod 9, the arms 2 and 2 can be swung by the arm lifting device 7 with the arm shaft 10 at the other end as a fulcrum. It has become. The pair of arms 2 and 2 are mounted on both sides of the left and right frames 12 and 1 by bearings 11 and 11 via slide keys (not shown).
It is attached to the arm shafts 10, 10 which are rotatably supported by 2, and a lever 13 is fixed to the arm shafts 10,
By rotating the arm shaft 10 via a cylinder 14 that connects the lever 13 to the other end, the rolling center 1 part at the tip of the arm 2 is vertically swung up and down.

Next, the mounting of the roll-shaped base paper 6 will be described. The rolling centers 1, 1 axially supported by the tips of the arms 2, 2 are rotated downward by the operation of the cylinders 14, 14 while being opened left and right, At the same height position as the center of the roll-shaped raw paper 6, the roll-shaped raw paper 6 stops at the same position. Then, in response to the next signal, the arms 2 and 2 slide to the center side via the screw rod 9 which is rotationally driven by the hydraulic motor 8 for opening and closing the arms, and the roll-shaped base paper 6 is moved by the rolling centers 1 and 1 to the central core tube portion. Is pinched. Then, it is lifted up to a predetermined height by the cylinder 14, and the setting of the mill roll stand is completed.

[0004]

In the conventional mill roll stand, during roll unwinding, the roll-shaped base paper 6 is passed through the rolling center 1 by the set pressure of the hydraulic motor 8 for opening and closing the arm.
Is tightening. At this time, if the pressure set value of the hydraulic motor 8 is too high, the mouthpiece 15 (FIG. 2) of the core tube portion of the roll-shaped base paper 6 is deformed and it becomes difficult to chuck the base paper when it is reused. Further, as the diameter of the base paper becomes smaller, there is a problem that the base paper is broken due to a high tightening force. On the other hand, if the pressure setting value is too low, the rolling center 1 and the roll-shaped base paper 6
There is a drawback that slippage occurs, the base portion of the core tube is damaged and the base paper cannot be reused, and the rolling center 1 is worn early. The present invention has been proposed to solve the above conventional problems.

[0005]

Therefore, the present invention comprises means for detecting the rotation of a rolling center that rotatably supports a roll-shaped base paper, means for detecting the running of the base paper, and the two detection means. It is provided with means for comparing and calculating signals to determine the presence or absence of slip between the rolling center and the roll-shaped base paper, and means for controlling the rolling center drive device based on the result of the determining means. It is a means for solving the problem.

[0006]

According to the present invention, the occurrence of slippage between the rolling center and the base paper is detected by the detection device which outputs the rotation signal of the rolling center and the detection device which outputs the traveling signal of the roll-shaped base paper, and the set pressure of the hydraulic motor for opening and closing the arm is detected. Temporarily increase it to increase the rolling center paper clamping force and prevent slippage. That is, the mill roll stand is unwinding,
When the rolling center rotation detection device outputs a signal indicating running and the rolling center rotation detection device detects an abnormal rotation (stop rotation or abnormal deceleration rotation), slippage occurs between the rolling center and the roll-shaped base paper. Then, the set pressure of the hydraulic motor for opening and closing the arm is temporarily increased to prevent the rolling center and the roll-shaped base paper from slipping.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments of the drawings. FIGS. 1 and 2 show an embodiment of the present invention in which a signal 20 indicating the rotation of a rolling center 1 and a roll-shaped raw paper 6
By comparing 22 with the signal 21 that detected the running of the rolling center, the slip between the rolling center 1 and the roll-shaped base paper 6 is detected, and if there is a slip, the tightening force of the base paper of the rolling center is increased to prevent the slip. is there. When this specific example is described with reference to FIG. 2, the functions of general components such as the rolling center 1 and the arm 2 are the same as those described in the section of the prior art. The present invention proposes a defect related to the arm tightening of the conventional mill roll stand, and its configuration will be described below. First, in the rotation signal 20 of the rolling center 1, the proximity piece (reference mark) 4 attached to the rolling center 1 in FIG.
It is detected and emitted by. On the other hand, the running detection signal 21 of the base paper is the operation speed signal of a single facer (not shown) which is a downstream device of the normal mill roll stand, or the rotation of a paper feed guide roll in an automatic paper splicing device (not shown). Use signals.

The mill roll stand slips on the rolling center 1 and the roll-shaped base paper 6 when both the rotation signal 20 of the rolling center 1 and the base paper running detection signal 21 are normally transmitted during normal operation. Indicates that has not occurred. On the other hand, the rotation signal 20 of the rolling center 1 is transmitted although the base paper traveling detection signal 21 is transmitted.
If any abnormality (stop of rotation or abnormally decelerated rotation) is detected, it is determined that slippage has occurred between the rolling center 1 and the roll-shaped base paper 6, and the pressure setting of the arm opening / closing hydraulic motor 8 in FIG. 4 is set. Is temporarily switched to the high pressure side, and the tightening force of the roll-shaped base paper 6 is increased to prevent slippage.

[0009]

As described in detail above, according to the mill roll stand of the present invention, when a slip occurs between the rolling center and the roll-shaped base paper, it is detected to temporarily increase the tightening force of the base paper. It is possible to prevent slipping of the roll-shaped base paper Therefore, it is possible to prevent damage to the base portion of the roll-shaped base paper, and it becomes easy to reuse the roll-shaped base paper. Further, since the rolling center can be prevented from being worn, it can be used for a long period of time.

[Brief description of drawings]

FIG. 1 is a control block diagram showing an embodiment of the present invention.

FIG. 2 is a partial sectional front view of a rolling center portion in the mill roll stand according to the embodiment of the present invention.

FIG. 3 is a side view of a conventional mill roll stand.

FIG. 4 is a front view of a part of FIG.

[Explanation of symbols]

 1 Rolling center 2 Arm 4 Proximity piece 5 Rotation detection device 6 Roll base paper 20 Rolling center rotation signal 21 Roll base paper running detection signal 23 Slip presence / absence determination 24 Rolling center tightening

Claims (1)

[Claims] 1. A means for detecting the rotation of a rolling center that rotatably supports a roll-shaped base paper, a means for detecting the running of the base paper, and a calculation of signals from the two detection means, and the rolling center and A base paper supply device comprising: means for determining whether or not there is a slip between roll-shaped base papers; and means for controlling a rolling center drive device based on the result of the determination means.