JPH0479944B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to, for example, a turret-type unwinding device, and in particular, to splice positioning accuracy for continuing unwinding from a current roll being unwound to a next standby roll. This invention relates to a rewinding device with improved performance.

[Prior Art] A conventional device of this kind will be explained based on FIG. 2. In the figure, 1 is a turret type unwinding stand, 2 is a current roll in the process of being rewound, and 3 is a turret type unwinding stand. The next roll located on the opposite side of the current roll 1 through the unwinding stand 1, 4 and 4 are guide rolls located perpendicular to the connections of the current roll 2 and the next roll 3 via the unwinding stand 1, and 5 is the current roll 2. Material being rewound in the direction of the arrow, 6 is the next roll 3
A measuring roll that measures the diameter of the next roll 3 by being driven toward and away from the arrow in the direction of the arrow.
and outputs it to a subtracter 8 which subtracts it from the distance (L) from the starting point of the measuring roll 6 to the center of the next roll 3, and this subtracter 8 calculates the radius value of the next roll 3 which is the verification result. is output to a multiplier 9, where the diameter of the next roll 3 is calculated. The calculated diameter of the next roll 3 is
At the time of splicing (described later), the next roll 3
It is used to match the circumferential speed of the material 5 with the unwinding speed of the material 5. A drive motor is driven according to a driving pattern 11, and the rotational speed of this motor 10 is reduced by a speed reducer 12 to rotate the rewind stand 1. The unwinding stand 1 and the drive motor 10 constitute a driving means for transporting the next roll 3 newly mounted at the first fixed position (at the position of the current roll 2) to the second fixed position (the position shown). are doing.

10a is a brake for stopping the drive motor 10 in response to the deceleration command of the driving pattern 11;
13 is a limit switch for stopping the turret shaft on which the next roll 3 is attached at the second fixed position;
14 is a knife disposed close to the second fixed position;
15 is a pressure roll for auto splicing that cooperates with the knife 14.

The limit switch 13 constitutes a sensor means for detecting the operating position of the next roll 3 and its drive means, that is, the unwinding stand 1 and the drive motor 10,
constitutes a splicing means for unwinding the next roll 3 following the current roll 2.

The next roll 3, which is stopped in the second fixed position, is glued and cut and automatically connected to the material 5 by the action of the pressure roll 15 and the knife 14 as splicing means, in a known manner.

In addition, in driving pattern 11, 11a, 11
b indicates the timing at which the turret shaft starts rotating and the timing at which the limit switch 13 operates.

Next, the operation will be explained. As shown in FIG. 2, when the remaining amount of the current roll 2 in the process of unwinding the material 5 decreases, the splicing means 1
4 and 15, the material 5 is automatically connected to the next roll 3, which continues the unwinding operation.

Thereafter, a new next roll (not shown) is attached to the first fixed position of the cut current roll 2, and is rotated to the second fixed position of the next roll 3.

At this time, when a turning command is output at the turning start timing 11a of the driving pattern 11 and the drive motor 10 is started, the rewinding stand 1 turns via the reduction gear 12. When the new next roll is turned from the first fixed position (rewind position) to the second fixed position (standby position), it becomes the next roll 3 in the illustrated state. Also, the next roll 3 after the second fixed position
In this case, the starting end of the next roll 3 is connected to the material 5 being fed out from the current roll 2 by the splicing means 14 and 15, and the unwinding of the material 5 is continued to become a new current roll. The roll 2 is then transferred from the second fixed position to the first fixed position by the rotation of the turret shaft, resulting in the current roll 2 in the state shown.
At this time, as the turret shaft rotates, the guide roll 4 located at the upper side in the figure becomes a guide roll for the current roll 2 located at the lower side in the figure and at the first fixed position.

Therefore, the unwinding stand 1, that is, the driving means, which rotates together with the rolls 2, 3 and the guide roll 4, positions the first roll in the unwinding process at the first fixed position, and also positions the first roll in the unwinding process for the next unwinding. The second roll is positioned at the second regular position, and the second roll, which has continued the unwinding process at the second regular position, is transferred to the first regular position as the first roll, and a new roll is transferred to the first regular position. The mounted roll is transferred to a second fixed position as a second roll.

When the new next roll reaches the second fixed position from the first fixed position, the brake 10a is applied to the drive motor 10 by the limit switch 13 to stop the rotation.

Next, the measuring roll 6 moves until it comes into contact with the surface of the next roll 3, and the moving distance (ΔL) is measured by the length measuring device 7. Then, the subtracter 8 calculates the radius R of the next roll 3 as shown in the following equation.

R=L-△L L: From the starting point of measuring roll 6 to the next roll 3
Distance to the Center The radius R of the next roll 3 obtained in this way is multiplied by 2R in the multiplier 9 to obtain the diameter D of the next roll 3. This diameter D contributes to setting the circumferential speed of the next roll 3 during the next splice with the next roll 3 newly installed at the second fixed position.

As described above, when positioning the next roll 3 at the second fixed position, high positioning accuracy is required in order to maintain connection accuracy during splicing. For this reason, Japanese Patent Application Laid-Open No. 59-36060 and 60
The position described in the -67352 publication is proposed, but since both detect the rotational position of the unwinding stand 1 in the same way as the conventional device described above, if the diameter of the next roll 3 changes, High precision cannot be achieved.

[Problems to be Solved by the Invention] As described above, in the conventional device, the stopping position of the next roll 3 is determined based on the operating position of the unwinding stand 1, which is the driving means for the next roll 3. The following problems arose in stopping the shaft at a fixed position.

(1) The accuracy of stopping the next roll in a fixed position varies depending on the weight of the roll.

(2) Since the turret shaft is stopped at a fixed position, the diameter of the next roll is fixed to some extent due to the operating distance between the pressure roll and the knife.

(3) Since the diameter of the next roll is measured using a contact method, the next roll becomes concave due to the contact pressure, resulting in measurement errors.

(4) This results in variations in tail end length and splice errors in the auto splice control in the next process.

This invention was made to solve the above-mentioned problems, and it allows the turret shaft to stop at a fixed position regardless of the diameter and weight of the next roll, expands the limit value of the next roll diameter, and enables non-contact rolling. The purpose of this invention is to measure the diameter of the next roll with high precision by measuring the diameter of the roll, and to improve the accuracy of auto-splice control in the next process.

[Means for solving the problem] In the rewinding device according to the present invention, the sensor means:
a start sensor that is activated when the drive means starts to detect the operation start position of the drive means; and a start sensor provided at the deceleration start position on the transfer trajectory passing through the central axis of the second roll from the first fixed position to the second fixed position. and a second sensor provided at the stop position of the second roll on the transfer trajectory, and the operation pattern is set to the second sensor.
In response to the operation of the sensor, a predetermined deceleration pattern is commanded to the drive means, and in response to the operation of the first sensor, the transfer of the second roll is stopped, and the calculation means changes the speed from the operation of the start sensor to that of the second sensor. The diameter of the second roll is calculated based on the amount of movement of the driving means until it is activated.

[Function] According to the present invention, by performing a deceleration pattern operation, the accuracy of stopping the roll in a fixed position is improved regardless of the roll weight, and the non-contact roll diameter detection based on the turning angle is realized with high accuracy, and the deceleration start inspection is also performed. By arranging the output sensor and the roll fixed position stop sensor on the rotation trajectory around the roll center, the next roll can always be stopped at the optimum fixed position for auto splice control in the next process without being constrained by the roll diameter. .

[Embodiment] Hereinafter, based on the embodiment shown in FIG. 1, the same reference numerals will be given to parts that are the same as or corresponding to the conventional one, and the features of the present invention will be mainly explained. In the figure, 16 is a deceleration position detection sensor that detects the deceleration start point when decelerating the turning speed of the turret, and 17 is a fixed position sensor that detects the stop position of the next roll 3. The fixed position sensor 17 is also located on the trajectory of the turret axis, and in particular, the fixed position sensor 17 moves around the unwinding stand 1,
The connection between the current roll 2 and the stand 1 and the connection between the stand 1 and the fixed position sensor 17 form a reference angle φ. Each of the sensors 16 and 17 is composed of, for example, a well-known optical sensor or the like, and detects the roll outer shape on the transfer trajectory of the next roll 3 in a non-contact manner. Reference numeral 18 denotes a start sensor that detects the turning start point in measuring the turning angle of the turret. Upon receiving the detection value of this sensor 18, the angle measurement sensor 19 is activated to measure the turning angle θ and send the measured angle to the calculator 20. Output θ. The start sensor 18 together with the sensors 16 and 17 constitutes a driving means and a sensor means for detecting the operating position of the next roll 3. Arithmetic unit 2
0 calculates the roll diameter D of the next roll 3 by calculating {4a·sin(Φ-θ/2)} from the reference angle φ formed by the current roll 2 and the fixed position sensor 17 and the measurement angle θ. However, in the upper color, 4a is the radius of the transport locus of the next roll 3 and the guide roll 4, and is input and set in the calculator 20 in advance.

Further, 21 is a variable speed control device that controls the rotation speed of the drive motor 10, and is configured to operate according to the driving pattern 11. The driving pattern 11 at this time is the turning start timing 11.
Timing 1 when a and fixed position sensor 17 operated
1b, and 11c indicates the operation timing of the deceleration position detection sensor 16. The variable speed control device 21 includes the rewinding stand 1 and the drive motor 1.
0 constitutes a driving means for the next roll 3.

The start sensor 18 corresponds to the origin of the turning angle θ, the deceleration position detection sensor (first sensor) 16 corresponds to the deceleration start point, and the fixed position sensor (second sensor) 17 corresponds to the stop point. Also, driving pattern 11
commands a predetermined deceleration pattern to the drive means in accordance with the operation of the first sensor 16, and also
The transfer of the second roll is stopped in response to the operation of the sensor 17. Moreover, the computing unit 20 is
The diameter D of the second roll 3 is calculated based on the transfer amount θ of the driving means from the activation of the start sensor 18 to the activation of the second sensor 17.

Next, to explain the operation, driving pattern 1
When a turn start command is output from turn start timing 11a from 1, the variable speed control device 21 is activated and the drive motor 10 rotates, and this rotation speed is set to the speed reducer 1.
2, the turret shaft starts turning at a predetermined turning speed, the start sensor 18 works, and the angle measuring sensor 19 starts measuring the turning angle θ.
Next, when the turret shaft reaches the deceleration position detection sensor 16, a deceleration command is issued, and at this time the variable speed control device 21 adjusts the operation timing 1 of the operation pattern 11.
The drive motor 10 is decelerated by operating according to the deceleration pattern after 1c. Further, due to the operation of the fixed position sensor 17, when the operation timing 11b is reached, the brake 10a is applied to stop the turret shaft.

From the measurement angle θ of the angle measurement sensor 19 at timing 11b and the reference angle φ, {4a・sin
(φ-θ/2)} is calculated by the calculator 20 to determine the diameter D of the next roll 3. In this way, the next roll 3 is positioned with high precision by each sensor 16 and 17 arranged on the transfer trajectory of the next roll 3, and the diameter D of the next roll 3 is determined by the turning angle θ based on each sensor 18 and 17. Can be calculated.

At this time, each sensor 16 and 17 detects the same outer circumference of the next roll 3 during rotation, so regardless of the difference in the diameter D of the next roll 3, the stop position (contact point with the second sensor 17) is 2. Stop at a fixed position with high precision. Therefore, the distance between the knife 14 and the pressure roll 15 and the next roll 3 can always be set constant, and the reliability of the splice can be improved.

Since the fixed position detection sensor 17 is located on the transfer trajectory passing through the central axis of the next roll 3, the angle θ from the rotation start position to the stop position of the unwinding stand 1 is large, and the fixed position detection sensor 17 If it is close to the reference angle φ, it can be seen that the diameter D of the next roll 3 that has turned from the first fixed position to the second fixed position and stopped is small. It can also be seen that if the turning angle θ is small, the diameter D of the next roll 3 is large and the roll stopped before the reference angle φ.

In the above embodiment, the case of a turret type unwinding device was explained, but a transfer type unwinding device may also be used, and by measuring the moving angle of the next roll, the roll diameter can be determined with high precision without contact. By using a variable speed control device in the moving device, the roll can always be stopped at an optimal position, and the same effects as in the above embodiments are achieved.

[Effects of the Invention] According to the invention described above, the sensor means includes a start sensor that is activated when the drive means starts to start and detects the operation start position of the drive means, and a start sensor that operates from the first fixed position to the second fixed position. The operation pattern includes a first sensor provided at a deceleration start position on a transfer trajectory passing through the central axis of the second roll, and a second sensor provided at a stop position of the second roll on the transfer trajectory. In response to the operation of the first sensor, a predetermined deceleration pattern is commanded to the drive means, and in response to the operation of the second sensor, the transfer of the second roll is stopped, and the calculation means changes the speed from the operation of the start sensor to the second sensor. Since the diameter of the second roll is calculated based on the amount of movement of the drive means until the operation of It is possible to accurately stop the roll at the second fixed position and to accurately calculate the roll diameter.
Therefore, it is possible to eliminate variations in the tail end length of the material in the auto splice control of the next process,
It is possible to improve operational efficiency without causing splice failures.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a device according to an embodiment of the present invention, and FIG. 2 is a diagram corresponding to FIG. 1 of a conventional device. In the figure, 1 is an unwinding stand, 2 is the current roll (first roll), 3 is the next roll (second roll),
10 is a drive motor, 11 is a driving pattern, 14 is a knife, 15 is a pressure roll, 16 is a deceleration position detection sensor (first sensor), 17 is a fixed position sensor (second sensor), 18 is a start sensor, and 20 is a computing unit. , 21 is a variable speed control device, θ is a turning angle, D
is the diameter of the next roll. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. Positioning the first roll in the unwinding process at the unwinding position, that is, the first fixed position, and positioning the second roll for next unwinding at the standby position, that is, the second fixed position, Further, the second roll, which continued the unwinding process at the second fixed position, is transferred to the first fixed position as a first roll, and the roll newly installed at the first fixed position is set as a second roll. a driving means for transporting the second roll to the second fixed position; a sensor means for detecting the operating state of the driving means and the position of the second roll; and sequentially rewinding the second roll following the first roll. splicing means disposed adjacent to the second fixed position for connecting the starting end of the material of the second roll in the second fixed position to the material being unwound from the first roll; The second roll is moved from the first fixed position to the second roll.
A rewinding device comprising: an operation pattern for generating an operation command for the drive means for transporting the second roll to a fixed position; and a calculation means for calculating the diameter of the second roll. a start sensor that is activated at the start of activation of the drive means to detect the operation start position of the drive means; and a start sensor that starts decelerating on a transfer trajectory passing through the central axis of the second roll from the first fixed position to the second fixed position. a first sensor provided at a position, and a second sensor provided at a stop position of the second roll on the transfer trajectory, and the driving pattern includes a first sensor provided at a stop position of the second roll on the transfer trajectory, and the driving pattern is determined based on the operation of the first sensor. a predetermined deceleration pattern for the vehicle, and stops the transfer of the second roll according to the operation of the second sensor, A rewinding device characterized in that a diameter of the second roll is calculated based on a transfer amount of the drive means.