JPH01252450A - Revolution speed detecting device in taking-up device - Google Patents

Abstract

PURPOSE:To correctly detect the number of revolution of a driven roller and obtain a uniform taking-up quantity of a strip-shaped material by installing a target element which integrally revolves with a driven roller, detecting element for detecting the pass, and a revolution absorbing means for holding the detection element at an immovable position. CONSTITUTION:When a drive roller 2 revolves and a driven roller 1 is revolved through a strip-shaped member 3, also a basic body 5 integrally revolves. While, a revolution absorbing member 7 is slided through a bearing 17, and since a detection element 8 is installed through an installation metal fitting 23 and a holder 24, a connection part 22 does not revolve in the downwardly suspended state because of the weight of the detection element 8. Therefore, even if the basic body 5 revolves, the detection element 8 is kept in a standstill state always at an immovable position. Therefore, a target element 6 crosses the front surface of the detection element 8 through the revolution of the basic body 5, and signals are obtained periodically from the detecting element 8. The signal cycle becomes equal to the revolution speed of a roller 1, since the basic body 5 and the roller 1 revolve integrally, and the revolution speed can be detected from the frequency.

Description

Detailed Description of the Invention [Purpose of the Invention (Industrial Field of Application) The present invention relates to the detection of rotational speed in a device for winding up, for example, flexible strip-shaped paper or metal plates. The present invention relates to a rotational speed detection device in a winding device that can improve the accuracy of detecting the rotational speed of a winding roll.

(Prior Art) Flexible band-shaped materials such as paper and metal plates are stored, transported, sold, etc. by being wrapped around wax.

Conventionally, this belt-shaped material winding device has a schematic configuration as shown in FIGS. 4 and 5.

In FIGS. 4 and 5, the driven roll 1 and the driving roller 2
are arranged parallel to each other, and the driven roller 1 is in pressure contact with the driving roller 2.

The drive roller 2 is connected to a drive source such as a motor and rotates actively, and the driven roller 1 is rotated by rotational force generated by contact pressure with the drive roller 2.

In addition, a strip material 3 such as paper or metal plate is wound around the driven roller 1.
is sent between the driven roller 1 and the driving roller 2, and is wound around the driven roller 1.

FIG. 4 schematically shows the state of the strip material 3 at the beginning of winding, and FIG. 5 schematically shows the state approaching the end of winding.

As can be seen from FIGS. 4 and 5, the driven roller 1 is moving away from the driving roller 2 as the strip material 3 is wound up.

As shown in FIG. 4, at the beginning of the winding of the belt material 3, the distance between the belt material 3 wound around the outer peripheral surface of the driven roller 1 is small, so that the axial center of the driven roller 1 and the axial center of the drive roller 2 are aligned. The interval dimension L1 is small.

However, as the end of winding approaches, the effective diameter of the driven roller 1 increases, and the axial center distance L2 between the driven roller 1 and the driving roller 2 increases as shown in FIG.

Therefore, the number of revolutions of the driven roller 1 gradually decreases as the end of winding of the strip material 3 approaches.

Furthermore, as the end of winding approaches, the weight of the driven roller 1 increases, so the power connection maintained by contact pressure slips between the strip material 3 and the drive roller 2, and the rotation of the driven roller 1 is reduced. In some cases, the speed may be non-uniform.

However, the number of rotations serves as an index for the amount of the strip material 3 wound around the driven roller 1, that is, the amount of product, and is important in determining the end of winding. Therefore, unless the number of rotations of the driven roller 1 is accurately detected, the amount of winding, that is, the amount of product will not be stable.

The rotational speed detection method in the conventional winding device is a method of detecting the rotational speed of the drive roller 2.

For this reason, if slipping occurs between the strip material 3 and the drive roll 2 and the driven roll 1 does not rotate accurately, it will not be possible to determine the position of the strip material 30 wound around the driven roll 1, and the product volume will be reduced. This may cause variations in the This is to improve efficiency.
This is especially a problem when rotating at high speed and winding it up. Therefore, a separate means for stabilizing the rotation of the driven roll 1 is required.

(Problems to be Solved by the Invention) As described above, the rotation speed detection device in the conventional winding device employs a method of detecting the rotation speed of the drive roll 2. Therefore, even if the driven roll 1 does not rotate accurately due to slippage between the strip material 3 and the drive roll 2, it is determined that the driven roll 1 has rotated a predetermined number of times. As a result, there was a problem in that the amount of winding around the driven roll 1 varied, resulting in a reduction in product accuracy.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a winding device that can accurately detect the number of revolutions of a driven roller that winds up a strip material, and can uniformize the amount of winding of the strip material. It is an object of the present invention to provide a rotation speed detection device for.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, a rotation speed detection device in a winding @ position according to the present invention includes a target element that rotates together with a driven roll that winds a strip material. a detection element that is provided adjacent to the rotation path of the target element and detects passage of the target element; and a detection element that supports the detection element and is attached to the driven roll and absorbs rotation of the driven roll. and rotation absorbing means for holding the detection element in an immovable position.

(Function) According to the above configuration, the target element rotates together with the driven roller in front of the detection element that is stationary at an immovable position. Therefore, by detecting the number of passages of the target element with the detection element, the number of rotations of the driven roller can be directly and accurately obtained.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 3 schematically show the configuration of a rotational speed detection device in a winding device according to an embodiment of the present invention, and the configuration of the winding device is an example explained in FIGS. 4 to 5. The following explains the case where . Therefore, parts in FIGS. 1 to 3 denoted by the same reference numerals as in FIGS. 4 to 5 have the same configurations as those in FIGS. 4 to 5.

In FIGS. 1 to 3, the rotation speed detection device 4 is a base 5
．． Target element 62 rotation absorbing member 7. It is composed of a detection element 8 and the like.

The base body 5 is formed into a short substantially cylindrical shape, and a flange portion 14 provided with an engagement hole 13 is integrally formed at the lower end thereof. The flange portion 14 faces the end surface 11 of the driven roller 1 which rotates by engaging the outer peripheral engagement groove 10 with the guide plate 9 on the winding device side. A corresponding engagement hole 12 is provided.

Further, a pair of target elements 6 are provided on the other end surface 15 of the base body 5 so as to be displaced approximately 180 degrees. This target element 6 is composed of, for example, a permanent magnet.

Furthermore, a bearing storage groove 16 is provided on the outer periphery of the base body 5 at a position offset toward the other end surface 15 and is formed over the entire circumference, and a bearing 17 is installed in this bearing storage groove 16. . And the base body 5 has the engagement hole 1
1I5 (not shown) is brought into contact with the end surface 11 of the driven roller 1 by matching the engagement hole 13 with the engagement hole 13.
It is removably fixed using a second attachment means and rotates together with the drive roller 1.

The rotation absorbing member 7 has an annular part 21 on the upper part, and the outer sliding ring 18 of the bearing 17 in the bearing storage groove 16 is received and fixed in the annular part 21, and is connected to the inner ring 20 via the ball 19. It is attached to the base body 5 in a freely sliding manner. A connecting portion 22 is integrally provided below this annular portion 21, and a mounting bracket 23 is fixed to this connecting portion 22.

The mounting bracket 23 extends outward from the connecting portion 22 at right angles, is bent upward roughly at the middle portion, and the detection element 8 is attached to the upwardly bent tip portion via a holder 24.

This detection element 8 is composed of, for example, a Hall element, and is arranged adjacent to the rotation path of the target element 6, and when the target element 6 passes, a signal due to the magnetic flux of the target element 6 is converted into a detection signal converter such as a frequency-voltage converter. 25
(See Figure 2).

The rotation speed detecting device 4 configured in this way has the drive roller 2
rotates, and when the driven roller 1 rotates via the strip material 3, the base body 5 also rotates together. On the other hand, the rotation absorbing member 7 slides on a bearing 17 interposed between the base body 5 and the annular portion 21, and the mounting bracket 23. Since the detection element 8 is attached via the holder 24, the connecting portion 22 hangs downward due to the weight thereof and does not rotate.

Therefore, even if the base body 5 rotates, the detection element 8 remains stationary at all times. As a result, the target element 6 crosses the front surface of the detection element 8 by 50 rotations of the base.
At this time, a signal is periodically obtained from the detection element 8. Since the base body 5 and the driven roller 1 are rotating together, this signal period corresponds to the rotational speed of the driven roller 1, and the number of rotations can be determined from the frequency.

Therefore, according to this rotation speed detection device, the rotation of the driven roller 1 can be directly detected by the target element 6 and the detection element 8. As a result, even if slippage occurs between the driving rollers 1 and the driven roller 1 rotates unnaturally, a signal from the target element 8 that rotates together with the driven roller 1 is obtained, so the rotation speed can be accurately obtained. The amount of winding of the strip material 3 can be controlled. As a result, when applied to a winding device, the amount of product can be kept constant and product supply accuracy can be improved.

In the above embodiment, the rotation absorbing member 7 is connected to the driven roller 1.
disclosed a configuration in which the base body 5 is attached to the base body 5.
The driven roller 51 and the driven roller 51 may be integrally formed, and the rotation absorbing member 7 may be attached directly to the driven roller 1.

Further, the means for sliding between the rotation absorbing member 7 and the base body 5 is not limited to the bearing 17 described above, and of course may be modified in various ways.

[Effects of the Invention] As explained above, according to the rotation speed detection device in the winding device according to the present invention, the rotation of the driven roller can be directly detected. Moreover, the target element and the detection element are displaced together with the change in the center axis of the driven roller. This makes it possible to accurately detect the rotational speed of the driven roll itself without being affected by the winding of the strip material, thereby improving accuracy. As a result, the accuracy of winding the strip material by the winding device is improved, and a product with an even amount of winding can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the main parts of the rotation speed device in a winding device according to an embodiment of the present invention, and Fig. 2 shows a state in which the main parts shown in Fig. 1 are being attached to the winding device. 3 is an enlarged side view showing part A in FIG. 1 cut away, and FIG. 4 is a schematic diagram showing a general winding device for winding a strip material at the beginning of winding. FIG. 5 is a schematic diagram showing the same device shown in FIG. 4 as it approaches the end of winding. DESCRIPTION OF SYMBOLS 1... Driven roller, 2... Drive roller, 3... Strip material, 4... Rotation speed detection device, 6... Target element, 7... Rotation speed absorption member, 8... Detection element, 17
...Bearing, 23...Mounting bracket. Agent Patent Attorney Noriyuki Chika Agent Patent Attorney Yamashita - 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (3)

[Claims] (1) A driven roll that winds up a flexible strip material;
A rotation speed detection device in a winding device, comprising a drive roll connected to a drive source to be rotationally driven and in pressure contact with the driven roll to rotate the driven roll, the target element rotating integrally with the driven roll; , a detection element that is provided adjacent to the rotation path of the target element and detects passage of the target element; and a detection element that supports the detection element and is attached to the driven roll and absorbs the rotation of the driven roll and detects the passage of the target element. A rotation speed detection device in a winding device, comprising: rotation absorbing means for holding an element in an immovable position. (2) The winding device according to claim 1, wherein the rotation absorbing means includes a rotation absorbing member to which the detection element is attached, and the rotation absorbing member is attached to the driven roll in a sliding manner. Rotation speed detection device. (3) The rotational speed detection device in the winding device according to claim 1, further comprising a bearing interposed between the rotation absorbing member and the driven roll.