JPH09151083A - Reel winding driving device in stringing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost by using a general purpose electric motor, and enhance versatility applicable to an existing device. SOLUTION: In a stringing device to perform stringing work while winding a wire A round a reel winder 3 through a winch 1, a winding drum 3a of the reel winder 3 is driven in rotation in the reciprocal direction by an electric motor 4 connected to the winding drum 3a through a speed reducer 5, and the electric motor 4 is controlled by an inverter circuit 7, and in a low rotation area of the winding drum 3a, control is performed on the basis of detection from an encoder 8 connected to the speed reducer 5. A detecting value of a load cell 11 to detect tensile force of the wire A is inputted to the inverter circuit 7, and the electric motor 4 is controlled on the basis of the detecting value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel winder driving device for an overhead wire device.

[0002]

2. Description of the Related Art Conventionally, as a device of this type, Japanese Patent Laid-Open No. 7-
As disclosed in JP-A-117988, there is provided one in which an inverter motor is mounted as a drive source of a take-up reel, and the take-up reel is rotationally controlled by this inverter motor.

[0003]

However, in the above-mentioned conventional apparatus, since the expensive inverter motor is used, the apparatus becomes expensive, and it is difficult to apply it to the existing apparatus, and it is inferior in versatility. There was a problem.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a highly versatile device that can be applied to an existing device while achieving cost reduction by using a general-purpose electric motor. And

[0005]

A reel winder drive device in an overhead wire device according to claim 1 of the present invention is an overhead wire device for performing an overhead wire work while winding a wire around a reel winder through a winch. The winding drum is configured to be rotationally driven in forward and reverse directions by an electric motor connected to the winding drum via a speed reducer, and the electric motor is controlled by an inverter circuit.

According to a second aspect of the present invention, in the reel winder drive device of the overhead wire device, in the reel winder, in the low rotation region of the winding drum, an inverter circuit is detected based on detection from an encoder connected to a speed reducer. The amount of torque is controlled by controlling the amount of slip represented by the difference between the output frequency and the actual number of revolutions of the electric motor.

According to a third aspect of the present invention, in the reel winder driving device in the overhead wire device, a detection value of a load cell for detecting the tension of the wire is input to the inverter circuit, and the electric motor is controlled based on the detection value. It is what is done.

[0008]

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

FIG. 1 is a block diagram showing a schematic structure of a drive system and an operating system of a reel winder.

In FIG. 1, reference numeral 1 is a winch, and this winch 1 is provided with a capstan 1a which is rotationally driven by a drive motor 2, and after the wire A is wound around the capstan 1a by an appropriate number of times, a reel winder. It is led to 3.
The winch 1 is mounted on, for example, an overhead vehicle (not shown) that is configured to run freely.

The reel winder 3 winds up the wire A guided through the capstan 1a.
The wire A is configured to be wound around the winding drum 3a via the capstan 1a by a control device to be described later while maintaining a predetermined hand force (constant torque).

The winding drum 3a is configured to be rotatable in the forward and reverse directions (winding direction and feeding direction) by an electric motor 4 via a speed reducer 5.

The electric motor 4 is controlled by the control device so that the wire A is wound around the winding drum 3a with a constant torque.

This control device performs so-called inverter control, and is configured to be executed by the inverter circuit 7.

Here, FIG. 2 shows the relationship between the rotational speed of the winding drum 3a and the motor current of the electric motor 4 controlled by the inverter circuit 7.

In FIG. 2, for example, the winding side is represented as positive rotation (normal rotation), and the delivery side is represented as negative rotation (reverse rotation). As can be seen from FIG. 2, the winding drum 3a is increased by increasing the motor current as the rotation speed decreases.
Is designed to maintain a constant torque.

That is, even when the winding drum 3a is stopped, a constant torque is applied to the winding drum 3a to hold the wire A with a constant tension.

Here, in the region of .delta.f to -.delta.f in FIG. 2, that is, in the region where the rotation speed of the winding drum 3a has decreased, it is very possible to determine in which direction the winding drum 3a is rotating. It is difficult, for example, this δf ~-
Chattering occurs in the electric motor 4 in the region of δf.

Therefore, in order to solve this problem, a rotary encoder 8 is attached to the speed reducer 5, and the rotary encoder 8 feeds back the rotation status in the region of δf to −δf to the inverter circuit 7 so that the inverter circuit 7 can operate. Depending on this situation, the electric motor 4
The motor current is controlled accurately so that a constant torque is applied to the winding drum 3a even in the low speed region.

Further, reference numeral 9 in FIG. 1 is a rotary encoder for detecting the winding or feeding length of the wire A, that is, the strip length of the wire A. The rotary encoder 9 has three rollers 10a, 10b. It is connected to the center roller 10a that has been cut. In addition, the wire A is the bottom of the rollers 10b at both ends and the roller 1 in the middle.
It is arranged over the top of 0a.

Below the rotary encoder 9, the load cell 1 for setting the tension of the wire A is also provided.
1 is provided, and by controlling the electric motor 4 by the inverter circuit 7 based on the detection result detected by the load cell 11, the tension of the wire A, that is, the torque acting on the winding drum 3a is further accurately measured. You can control it well.

Next, the operation of the reel winder driving device thus constructed will be described.

First, while the winding drum 3a of the reel winder 3 is stopped, the winding drum 3a
In a, with respect to the rotation direction detected by the rotary encoder 8 by the electric motor 4 in order to hold the winding drum 3a constant (here, the winding side is normally rotated for explanation). A constant torque is added.

When the winch 1 starts winding in this state, the tension of the wire A between the winch 1 and the reel winder 3 decreases, and the motor current of the electric motor 4 also decreases. Based on this state, the inverter circuit 7 controls the operation of the electric motor 4 to rotate the winding drum 3a of the reel winder 3 to the winding side to wind the wire A.

When the winch 1 stops and the winding of the wire A is stopped, the rotation speed of the winding drum 3a of the reel winder 3 gradually decreases and stops. On this occasion,
The inverter circuit 7 recognizes that the rotation on the winding side has stopped by the detection value from the rotary encoder 8, and applies a constant torque to the electric motor 4 in order to keep the winding drum 3a on the winding side. It is attached.

In this way, the inverter circuit 7 can perform accurate control in the low rotation region of the winding drum 3a based on the detected value from the rotary encoder 8.

Further, the detected value from the load cell 11 is input to the inverter circuit 7, and the electric motor 4 is controlled based on the detected value so as to match the set tension.
The reel winder 3 is rotationally controlled.

The control on the sending side is performed in the same manner as the above control.

Although the automatic control has been described in the present embodiment, the switch operation can be manually performed.

The manual operation and the automatic operation are performed by the manual / automatic changeover switch 20 provided on the operation box shown in FIG.
The tension of the wire A can be set by the tension setting dial 21.

Reference numeral 22 shown in FIG. 3 is a power lamp, 23 is a lamp displayed when an abnormality occurs in the inverter circuit,
Reference numeral 24 is a lamp for displaying a manual operation, 25 is a lamp for displaying an automatic operation, 26 is a stop switch, 27 is a reset switch, and 28 is an operation preparation switch.

FIG. 4 shows an operation box used when performing a manual operation. In FIG. 4, reference numeral 30 is a forward rotation switch that supports the forward rotation operation of the winding drum 3a of the reel winder 3, 31 is a reverse rotation switch that supports the reverse rotation operation of the winding drum 3a, 32 is a stop switch, and 33 is a speed change dial. , 34 are automatic start switches, and 35 is an automatic stop switch.

Here, as described above, the winding drum 3a
The control to keep the torque amount of the constant is by detecting the torque current when the reel winder 3 is rotating at high speed.
Calculate the amount of torque.

When rotating at a low speed, the rotary encoder 8 detects the number of revolutions of the electric motor 4,
The actual rotation speed of the electric motor 4 is compared with the output frequency (command rotation speed) from the inverter circuit 7, and the difference in the rotation speed becomes the slip amount of the electric motor 4, and the torque amount is calculated from the slip amount. To do. In other words, since the amount of slippage is generated because the wire A has a predetermined tension,
This slip amount is regarded as the torque amount of the winding drum 3a.

As a result, the amount of torque during low-speed rotation and during high-speed rotation can be ascertained, and the output frequency is controlled based on this amount of torque to maintain a constant torque.

Next, the operation procedure and control when performing the overhead line work by using the reel winder drive device configured as described above will be described.

FIG. 5 is a schematic view showing an overhead line work.

First, the thin wire A is unwound from the wire drawing wheel 40, wound by the winch 1, the wire A is gradually thickened, and finally the gable B is installed.

In this overhead wire work, winding is started manually. Specifically, the operation preparation switch 28 shown in FIG.
Then, the automatic / manual switch 20 is operated to the manual side. After that, the forward rotation switch 30 which is a rotation direction command is turned on by the operation box shown in FIG.
When is rotated to a desired position, the speed change dial 33 becomes a speed command, and the winding drum 3a of the reel winder 3 rotates in the forward rotation direction at a speed corresponding to the rotation position of the speed change dial 33 to wind the wire A. At this time, the tension setting dial 21
It is wound by the control described above so as to maintain the tension set in. Therefore, when a torque amount larger than the set torque amount is generated, the speed is reduced so as to be controlled within the set torque amount.

Then, the wire A is wound around the winding drum 3a about three times, and when the slack of the wire A is eliminated between the winch 1 and the winding drum 3a, the speed change dial 33 is returned to 0 and the winding drum 3a is wound. The winding of the wire A by 3a is stopped.

Next, the automatic / manual switch 20 is operated to the automatic side to set a desired tension with the tension setting dial 21, so that the winding drum 3a is synchronized with the winding speed of the winch 1 and the wire is wound. The wire A is wound by the control described above while maintaining a constant torque amount so as to apply a constant tension to A. Therefore, when a torque amount larger than the set torque amount is generated, the speed is reduced so as to be controlled within the set torque amount.

At the time of winding the wire A, the winch 1
Is temporarily stopped, a slight frequency corresponding to the set tension is output to the electric motor 4 in the winding direction, whereby the winding drum 3a keeps the tension of the wire A constant and holds the stopped state. .

Thereafter, when the winch 1 starts winding again, the wire A is wound in synchronism with the winding speed and maintaining a constant tension in the same manner as described above, and the winding drum 3a is fully loaded. An alarm is given before winding, and when the winding drum 3a is fully wound, the winding drum 3a is replaced and winding is performed again.

When the winch 1 and the winding drum 3a are temporarily stopped and the winch 1 is reversed, the winding drum 3a also rotates in the feeding direction. At this time, the winding drum 3a is operated and controlled at a frequency slightly lower than the feeding speed, and the wire A is fed by the above-described control in a state in which a constant tension set for the wire A is applied. Therefore, when a torque amount larger than the set tension is generated, the reverse rotation frequency is increased so that the torque is controlled to fall within the set torque amount.

[0045]

According to the reel winder drive device in the overhead line device of the first aspect, the cost can be reduced by using a general-purpose electric motor, and the overhead line device can be applied to the existing device and has high versatility. Can be provided.

According to the reel winder driving device in the overhead wire device of the second aspect, in the low speed region of the winding drum, the amount of torque is controlled based on the detection from the encoder connected to the speed reducer, so that the winding is performed. It is possible to prevent chattering of the electric motor in the low speed area of the picking drum,
It is possible to perform accurate control.

According to the reel winder drive device in the overhead wire device of the third aspect, the electric wire motor is controlled by the inverter circuit on the basis of the detection result detected by the load cell, so that the tension of the wire, that is, the winding drum. The torque that acts can be controlled more accurately.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a drive system and a control system of a reel winder.

FIG. 2 is a diagram showing a relationship between a rotation speed and a motor current.

FIG. 3 is a front view showing an operation box.

FIG. 4 is a front view showing an operation box.

FIG. 5 is a schematic line drawing showing an overhead line work.

[Explanation of symbols]

 1 winch 3 reel winder 3a winding drum 4 electric motor 5 speed reducer 7 inverter circuit 8 rotary encoder 11 load cell A wire

Front page continuation (72) Inventor Kaoru Otonashi 2-9-18 Honjo-Higashi, Kita-ku, Osaka City Kanden Kogyo Co., Ltd. (72) Takenobu Hagiwara 6-11-13-117, Fukushima-ku, Fukushima-ku, Osaka Sink Industry Co., Ltd.

Claims (3)

[Claims] 1. An overhead wire device for performing an overhead wire work while winding a wire on a reel winder via a winch, wherein a winding drum of the reel winder is an electric motor connected to the winding drum via a speed reducer. A reel winder driving device in an overhead wire device, wherein the electric motor is rotationally driven in forward and reverse directions and the electric motor is controlled by an inverter circuit. 2. In the reel winder, in the low rotation region of the winding drum, the difference between the output frequency of the inverter circuit and the actual rotation speed of the electric motor is expressed based on the detection by the encoder connected to the speed reducer. 2. The reel winder drive device according to claim 1, wherein the amount of torque is controlled by controlling the amount of slippage. 3. The reel winder drive in an overhead wire device according to claim 1, wherein a detection value of a load cell for detecting the tension of the wire is input to the inverter circuit, and the electric motor is controlled based on the detection value. apparatus.