JPS6396816A - Accumulator control for wire/cable - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an accumulator control method in which electric wires and cables are run with a predetermined amount of slack during the manufacture of electric wires and cables.

<Prior art> In electric wire/cable manufacturing equipment, an accumulator is a device required to ensure switching time between the sending drum and the winding drum when manufacturing electric wires/cables continuously. The schematic structure is as shown in FIGS. 4 and 5.

In other words, with this device, the running electric wires and cables are
The moving wheel 1 moves while being wound up multiple times between the moving wheel 1 and the fixed wheel 2, and the moving wheel 1 includes, for example, a chain 5 stretched between two sprockets 3 and 4, and a gear box connected to one sprocket 3. The moving wheel 1 is moved freely in the left and right direction by a driving means 7 (such as an electric motor) connected through the wheel 6, and depending on the stop position of the moving wheel 1, the electric wires and
Adjusting the accumulation amount of cable L.

Therefore, when this accumulator is used on the delivery side drum side, during steady operation, for example, as shown by the solid line in Figure 4, the movable wheel 1 is kept far away from the fixed wheel 2 so that the accumulator is in the storage state. When switching the drum, the movable wheel 1 is gradually brought closer to the fixed wheel 2 side as shown by the broken line in the figure, and the stored electric wires/cables L are gradually hidden, and the drum is replaced during this time.

On the other hand, when this accumulator is used on the side of the take-up drum, during steady operation, for example, move the moving wheel 1 close to the stationary wheel 2 as shown by the broken line in Fig. 4 to create a hidden line state, and At the time of switching, the movable wheel 1 is gradually moved away from the fixed wheel 2 side as shown by the solid line in the figure, and the electric wires/cables L are stored, and the drum is replaced during this time.

<Problems to be Solved by the Invention> However, in this usage method, in the conventional accumulator, when the electric wire/cable L is stored or hidden, it is performed while applying a tensile force from the electric motor 7 to the moving wheel l. Because this is a control method, tension fluctuations occur in the wires and cables during the transition period of control operations from stored wires to hidden wires, or vice versa, from hidden wires to stored wires on the sending and take-up drums.
There were problems such as a defective outer diameter during extrusion molding for resin coating, a defective winding tension on the winding drum, and a defective elongation of the electric wire/cable L itself.

The present invention has been made in view of such conventional problems.

<Means for Solving the Problems and Their Effects> The feature of the present invention is that a moving wheel is installed movably by a driving means, and a fixed wheel is installed at an appropriate distance from the moving wheel. In an electric wire/cable accumulator in which the electric wire/cable is wound and run multiple times between the wheels, an electric wire/cable slack amount detector is provided near the fixed wheel to detect the slack amount of the electric wire/cable, and detect the slack amount. A slack amount deviation signal is obtained from the measured slack amount signal from the detector and the set slack amount signal from the slack amount setting device, and the driving means of the moving wheel is controlled by this slack amount deviation signal to obtain the desired amount of slack. It is a method of controlling an accumulator for electric wires and cables to maintain a fixed amount.

In other words, in the case of the control method of the present invention, the position of the moving wheel is controlled so that a predetermined amount of slack is always maintained in the electric wires/cables, so the wires/cables travel in an almost tension-free state, which is different from the conventional tension method. Harmful effects are removed.

<Embodiment> FIG. 1 shows an example of a control system for carrying out the method of the present invention.

In the same figure, 11 is a slack amount detector for detecting the amount of slack in the electric wire/cable L, 12 is a slack amount setting device for setting a predetermined amount of slack in advance, and 13 is the actual measured slack amount by the pulling amount detector 11. a slack amount comparator that compares the set slack amount signal with the set slack amount signal from the slack amount setter 12 and takes the deviation; 14 is a proportional-integral amplifier for amplifying this slack amount deviation signal; 15 is a proportional-integral amplifier for amplifying this slack amount deviation signal; A drive means (for example, a reversible electric motor) controlled by the slack amount deviation signal, 16 a power source for the drive means 15, 17 a rotation speed detector for detecting the actual rotation speed of the drive means 15, and 18 a drive means other than during normal operation. A rotation speed setting device 19 is used to arbitrarily move the moving wheel in the event of an emergency such as a wire breakage, etc., and 19 is a combination of the measured rotation speed signal from the rotation speed detector 15 and the above-mentioned deviation signal or rotation speed setting. A rotation speed comparator which compares the set rotation speed signal from the device 18 and calculates its deviation; 20 is a power control section including a silisk unit that controls the amount of power supplied based on this rotation speed deviation signal; and 21 is a slack amount. An interlocking changeover switch for switching between the detection circuit side and the independent rotation speed setting device circuit side, 22 is a breaker for the power supply circuit, and 23 is an open/close switch for the power supply circuit.

This control device system is attached to an accumulator having substantially the same configuration as the conventional one, for example, as shown in FIG.

In this example, the slack amount detector 11 is installed near the fixed wheel 2, and its configuration is, for example, as shown in FIGS. It consists of a guide roller 30 that rolls into contact with the roller 30, an arm 31 that supports this roller 30, and an angle detection section 32 that detects the vertical movement angle of this arm 31. It is calculated in accordance with the height h of

Note that the slack amount detection agricultural engineering 1 is not limited to this configuration; for example, a non-contact type configuration that optically detects the presence of the electric wire/cable L, or position calculation using a three-dimensional image using two camera monitors may be used. It is also possible to adopt a configuration in which the presence of the electric wire/cable L is detected by the following.

The accumulator control method using the present control device system thus constructed is performed as follows.

First, a predetermined amount of slack is set using the slack amount setting device 12,
Contact 21a on the slack amount detection circuit side of the interlocking changeover switch 21
Turn on.

Then, at startup, the electric motor 15 is rotated in accordance with the set amount of slack, and the moving wheel l is moved to a position corresponding to the set amount of slack, giving the running electric wires/cables the set amount of slack. .

When operation is started in this way, the electric wire/cable L
The actual slack amount is detected by a slack amount detector 11, and the actual slack amount signal and the set slack amount signal are detected by a slack amount comparator 1.
3, and the slack deviation signal is obtained. This slack deviation signal is amplified by the proportional-integral amplifier 14 and then input to the rotational speed comparator 19. This rotational speed comparator 19
Then, the actual rotational speed of the electric motor 15 is detected by the rotational speed detector 1.
7, this measured rotational speed signal and the slack amount deviation signal are compared to obtain the rotational speed deviation signal, and the power control section 20 is controlled by this rotational speed deviation signal.

As a result, the electric motor 15 always maintains the wire/cable I with the slack set by the slack amount setting device 12.

is rotated at an optimal speed to produce the desired results.

This moderate slack in the electric wire/cable L may cause unbalance in the sending-side drum, or wires/cables in the transition period from a stored wire to a hidden wire, or vice versa, from a hidden wire to a stored wire on the sending-out and winding-side drums. Tension fluctuations in L are effectively absorbed.

On the other hand, in an emergency such as when the electric wire/cable L is broken, it is necessary to move the accumulator, that is, the moving wheel 1 independently, apart from normal operation. By turning off the slack amount detection street side contact 21a of the changeover switch 21, and turning on the other contact 21b on the rotation speed setting device circuit side, an appropriate speed is set using the rotation speed setting device 18, which can be set independently. , just move the moving wheel 1.

Incidentally, if necessary, a braking device may be provided to apply an appropriate tension.

<Effects of the Invention> As is clear from the above description, according to the electric wire/cable accumulator control method according to the present invention, a running electric wire/cable is given a moderate amount of slack and is kept in a substantially tension-free state. Therefore, the following effects can be obtained.

(1) When the accumulator is used on the side of the delivery drum, it is possible to easily absorb tension fluctuations in electric wires and cables due to unbalance of the delivery drum. Therefore, it is possible to prevent the external shape from changing due to tension during extrusion molding for coating the resin. In addition, when replacing the delivery drum, it is possible to absorb and prevent tension fluctuations that occur during the transition period when the accumulator changes from a stored line to a hidden line, and vice versa, and further reduces mechanical loss in the drive system of the accumulator's moving wheel. It is also possible to absorb and prevent tension fluctuations due to

(2) On the other hand, when the accumulator is used on the side of the take-up drum, it absorbs tension fluctuations that occur during the transition period when the accumulator changes from a hidden line to a stored line or vice versa when the take-up drum is replaced. , and can eliminate product defects caused by abnormal elongation of thin electric wires and cables.

[Brief explanation of the drawing]

FIG. 1 is a wiring diagram showing an example of a control device system for implementing the electric wire/cable accumulator control method according to the present invention, and FIG. 2 is a schematic diagram showing an example of an accumulator to which the above control device system is applied. 3 is a schematic side view showing an example of a slack amount detector, FIG. 4 is a schematic side view showing an example of a conventional accumulator, and FIG. 5 is a schematic plan view showing the accumulator of FIG. 4. It is a diagram. In the figure, ■... Moving wheel, 2... Fixed wheel, 11... Slack amount detector, 12... Slack amount setter, 13... Slack amount comparator, 14... Amplifier, 15... Drive means, 16... Power supply, 17... Rotation speed detector, 18... Rotation speed setter, 19... Rotation speed comparator, 20... Power control unit, L.・Electric wires/cables, Figure 1

Claims (1)

[Claims] In an electric wire/cable accumulator in which electric wires/cables are wound and run multiple times between a movable wheel installed movably by a driving means and a fixed wheel installed at an appropriate interval from the movable wheel, A wire/cable slack amount detector is installed to detect the amount of wire/cable slack, and the slack amount deviation is determined from the actual slack amount signal from the slack amount detector and the set slack amount signal from the slack amount setting device. A method for controlling an accumulator for electric wires and cables, characterized in that the amount of slack is maintained at a predetermined amount by determining a signal and controlling the driving means of the moving wheel using the slack amount deviation signal.