JPS6026884B2 - Wrapping machine constant tension transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wrapping machine for wrapping cables of a suspension bridge, and more particularly to a moving device thereof.

A wrapping machine is a device that wraps cables used in suspension bridges with wire.

When the cable is horizontal, the wrapping machine moves naturally due to the frictional force between the wrapping wires that occurs when the cable is wound. However, when the cable has a slope, the wrapping machine has a downward force due to gravity,
This destroys the upward movement force generated during wrapping, so the wrapping machine cannot move.
. To offset this downward force, conventional wrapping machines have a balance weight. That is, a wire rope with one end connected to the wrapping machine was hung over a guide roller attached to a tower top saddle, and the other end of the rope was connected to a balance weight to offset the downward force of the wrapping machine. However, with this balance weight method, as the suspension bridge becomes longer and larger, the wrapping machine also becomes larger and the weight of the balance weight increases. As a result, there were drawbacks such as increased labor and decreased work efficiency. Moreover, the cables of suspension bridges have different slopes depending on their location, so as the suspension bridge becomes longer, the range in which the natural moving force of the wrapping machine and the offset force of the balance weights will shift, and the balance weights will be finely adjusted. It would be necessary to split and adjust, but as a practical matter, as mentioned above, this is not practical. Therefore, the object of the present invention is to
An object of the present invention is to provide a wrapping machine constant tension moving device for moving a wrapping machine with a constant tension.

The above objects, according to the invention, provide a drum for winding a rope member with one end fixed to a wrapping machine, a torque motor coupled to the drum, and a voltage connected to the torque motor for regulating an alternating current voltage. This wrapping machine regulator is equipped with a regulator and a remote control panel connected to the voltage regulator, and can easily control the upward tension of the wrapping machine's cable while observing the wrapping properties of the wrapping machine. This is accomplished by a tension transfer device.

The voltage regulator described above, in one embodiment of the wrapping machine constant tension transfer device according to the present invention, uses a combination of an inductive voltage regulator and a pilot motor. DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a wrapping machine constant tension moving device according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a side view of one embodiment of a wrapping machine constant tension transfer device according to the present invention.

It is fixed to the abutments supported by the suspension bridge's Cape Lu river and tower saddles 12, etc., and the bridge is fixed for a certain distance, for example, 1 hour, along the way.
Each section is held together by a cable band 14. The hanger rope 16 has one end fixed to the cable band 14,
The other end is fixed to a suspension bridge garter (not shown). The wrapping machine 18 is connected to a constant tension transfer device 26 by a wire rope 24 wrapped around guide rollers 20,22. The wrapping machine 18 includes a movable frame 28 that moves along the cable at a certain speed, for example, 10 m/min, and a wrapping wire 32 rotatably attached to the movable frame 28 and wound around a bobbin 301. A wrapping mechanism 34 is provided for wrapping. An operator located on a scaffold 36 near the wrapping machine 18 operates an operation panel 38 connected to the main body of the constant tension moving device 26 by a conductor 39 while observing the wrapping properties to increase the tension force in the upper direction of the cable of the wrapping machine. Control. FIG. 2 shows the electrical circuit of the constant tension transfer device 26. By winding the wire rope 24 on the winding drum 4, the wrapping machine 18 is slowly moved upward with a constant tension. The torque motor 42 is a cyclo reducer 44
, the winding drum 40 is rotated via the chain coupling 46. Although the torque motor 42 is capable of producing strong torque even at low speeds, the speed is further reduced by a cyclo reducer 44 to, for example, 1/87. Inductive voltage regulator 48 connects knife switch 52 from three-phase AC power supply 50.
, adjusts the phase AC voltage passing through the fuse 54 and supplies the adjusted voltage to the torque motor 42 via the electromagnetic contactor 56. The control panel 58 consists of a large number of electromagnetic contactors, etc.
It is remotely controlled by the operation panel 38 described above to drive the pilot motor 60 and adjust the induced voltage regulator 48 .

To explain the operation, when an operator who is near the wrapping machine 18 and is observing the wrapping properties decides that it is better to increase the cable upward tension, he presses the UP button 62 on the operation panel 38.

While the UP button 62 is pressed, the induction voltage regulator 48
continues to increase the pressure, increases the upward tension on the cable of the wrapping machine 18, and when the button is released, movement is performed with the set tension. If the cable upward pulling force is too strong, pressing the DOWN button 64 will weaken the cable upward pulling force of the wrapping machine 18. Since the operator has been given the cable upward pulling force vs. torque motor voltage curve in advance as shown in Figure 3, by looking at the voltmeter 66 on the operation panel, he can see how much torque is currently pulling the wrapping machine. You'll understand right away. Voltmeter 66 is connected to the output of yielding voltage regulator 48 by conductor 68 . Note that the reading of the voltmeter may be set as a torque scale in advance.
The cable upward tensile force and the torque motor voltage are approximately linear, as shown in FIG. When it is desired to cut off the power to the torque motor 42, the ON-OFF switch 68 on the operation panel is operated and the electromagnetic contactor 56 is turned off through the control panel 20. The result is the operation panel 1 from the conductor 7
4 and displayed by the indicator 72. As is clear from the above description, according to the wrapping machine constant tension moving device according to the present invention, it is possible to easily control the cable upward tension while observing the wrapping properties of a heavy wrapping machine nearby. Therefore, wrapping can be performed while reliably preventing overlapping of the wrapping wire.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the wrapping machine constant tension moving device according to the present invention. FIG. 2 is an electrical circuit diagram of the wrapping machine constant tension transfer device of FIG. 1; FIG. 3 is a graph showing the cable upward tensile force versus torque motor voltage characteristic of the device shown in FIG. 1
8...Wrapping machine, 38...Operation panel, 40...
- Winding drum, 42...torque motor, 48...guiding voltage regulator, 60...pulse motor. Figure - Figure 2 Figure 3

Claims (1)

[Claims] 1: a drum for winding up a rope member having one end fixed to a wrapping machine; a torque motor coupled to the drum; a voltage regulator connected to the torque motor and regulating an alternating current voltage; Equipped with a remote control control panel connected to the machine, by adjusting the voltage of the torque motor through the pulse motor, the cable tensile force in the upward direction of the wrapping machine can be easily braked while observing the wrapping properties of the wrapping machine. A wrapping machine constant tension transfer device that can be used for wrapping.