JPS6140909A - Constant tension feed-out apparatus of wire body - Google Patents

Abstract

(57) [Summary] 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 a wrapping wire body used for wrapping a wire body such as a protective wrapping wire around a cylindrical object such as a suspension bridge cable with constant tension. This invention relates to a constant tension delivery device.

[Prior art]

Conventionally, in order to prevent rust on the main cables of suspension bridges, wrapping wire has been wrapped around the main cables. In this case, if there is a variation in the tension of the wrapping wire,
This is not preferable in terms of rust prevention of the cable because gaps are created between the wrapped wrapping wires and slack is created in the wrapping wires.

Therefore, it is necessary to wrap the wrapping wire around the cable with constant tension.

Conventionally, a method for generating tension in the wrapping wire when wrapping the wrapping wire around the suspension bridge cable was published by Nippon Steel Corporation on September 20, 1975.
As described in "Steel Research" No. 285 (pages 83-87), (1) Applying braking force to the bobbin around which the wrapping wire is wound using a band brake or disc brake to generate tension in the wrapping wire. method to make
(2) A method is known in which a wrapping wire is wound around two friction rollers to generate tension in the wrapping wire.

However, in the case of method (1) above, since the braking torque is constant, if the winding diameter of the wrapping wire around the bobbin changes, a change in the tension of the wrapping wire occurs, and in the case of method (2) above, When the friction coefficient between the friction roller and the wrapping wire changes, it is necessary to adjust the wire tension by the friction roller, so the complicated adjustment operation is required, and the above (1)
As in the case of the above method, there is a problem in that a change in the winding diameter of the wrapping wire around the bobbin causes a change in the tension of the wrapping wire.

Conventionally, as a method of managing the tension of the wrapping wire, a method is known in which a band brake is activated by the action of a spring to maintain a constant tension. Since a brake is used, there is a problem in that there is no subtle movement in response to changes in tension, so tracking is poor, and when the frictional resistance of the band brake changes, the tension in the wrapping wire fluctuates.

[Purpose and structure of the invention]

The object of the present invention is to provide a constant tension delivery device for a winding wire body that can advantageously solve the above-mentioned problems, and the present invention is directed to a winding wire body fed out from a bobbin 1. 2 is wound around a cylindrical object via a sheave 6A fixed to a rotating disk 6 and a movable sheave 4, and a sheave support 5 rotatably supports the movable sheave 4, and is equipped with a shortening spring 6. The hydraulic chamber 8 of the hydraulic cylinder 7 and the hydraulic chamber 10 of the brake hydraulic cylinder 9 that brakes the rotary disk 6 are connected by a pipe 11. The first invention is characterized by a constant tension sending device for a linear winding body, in which a linear winding body 2 unwound from a bobbin 1 passes through a sheave 3A fixed to a rotating disk B and a movable sheave 4, and is then rolled into a circle. The sheave support 5 is wound around a columnar object and rotatably supports the movable sheave 4.
The bobbin 1 and the rotary disk 3 are attached to the rotary frame 13, and the control hydraulic cylinder 7 is connected to the rotary frame 13 via a control hydraulic cylinder 7, which is equipped with a load cell 12 and a shortening spring 6. The hydraulic chamber 8 of the rotary disk 6 is connected to the hydraulic chamber 10 of the brake hydraulic cylinder 9 for braking the rotary disk 6 through a pipe line 11, and the load cell 12 is connected to a tension frequency conversion transmitter 14 attached to the rotary frame 13. A second aspect of the present invention provides a constant tension sending device for a wire-shaped body for winding, characterized in that a receiving display device 15 connected to the device and having a tension display device at a remote location is provided.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

The drawing shows an example in which the present invention is applied to a constant tension delivery winding of a wrapping wire to the main cable of a suspension bridge. )
A sheave 5A is attached to a holding member 26 fixed to the rotary frame 13, and a bobbin 1 wound with a sheave 5A is rotatably attached thereto.
A rotating disk 3 fixed thereto is rotatably attached, and the wrapping wire 2 fed out from the bin 1 is wrapped 4 to 5 times around the sheave 6A, and then transferred to the turning sheave 13 and the movable sheave 4. and turning sheep 17, 18
．． 19 and the winding roller 20, and the cable (cylindrical object) 21 is wound around the winding roller 2o.
wrapped around.

The rotating frame 13 is a split annular body and has a driven ring gear on its outer periphery, and a pinion (not shown) of a drive device fixed to the frame of the wire wrapping machine meshes with the driven gear. be done.

The turning sheaths 13 to 19 are rotatably attached to the rotating frame 13, and the winding roll 20 is attached to the tip of a support arm 22 attached to the rotating frame 13. The base end of the cylinder 23 in the control hydraulic cylinder 7 is connected to a holding member 26 fixed to the control hydraulic cylinder 7.
The piston rod 24 and the /p support 5 to which the movable sheath 4 is rotatably attached are connected via a load cell 12, and a hydraulic cylinder shortening spring 6 is housed in the cylinder 26.

The hydraulic chamber 10 of the brake hydraulic cylinder 9 facing the rotating disk B and the hydraulic chamber 8 of the control hydraulic cylinder 7 are connected by a pipe 11, and the piston rod of the brake hydraulic cylinder 9 is connected to the hydraulic chamber 8 of the control hydraulic cylinder 7. A brake shoe 25 that contacts the rotating disk B is attached, and the cylinder in the brake hydraulic cylinder 9 is fixed to a holding member 26 fixed to the rotating frame 13.

The piston 27 is moved by the spring 6 in the control hydraulic cylinder Z.
The wrapping wire 2 is pulled through the piston rod 24, the load cell 12, the sheath support 5, and the movable sheave 4, and the wrapping wire 2 between the sheave 6A fixed to the rotating disk B and the cable 21 is pulled, and The piston 27 pressed by the spring A pressurizes the liquid in the hydraulic chamber 8 of the control hydraulic cylinder 7, and this liquid pressure acts on the hydraulic chamber 10 of the braking hydraulic cylinder 9, and the braking A braking force is applied to the rotating disk B by the braking shoe 25 attached to the piston rod in the hydraulic cylinder 9, and tension is applied to the wrapping wire 2 between the sheave 6A fixed to the rotating disk 6 and the cable 21. be done.

When the tension of the wrapping wire 2 between the 7-pipe 3A and the cable 21 becomes larger than a predetermined value, the movable sheave 4 and the sheath support 5 resist the force of the spring 6 in the control hydraulic cylinder 7. , the load cell 12, piston rod 24, piston 27, etc. move toward the diverting soap 13.17,
Since the pressure in the hydraulic chamber 8 in the control hydraulic cylinder 7 is reduced, the pressure in the hydraulic chamber 10 in the braking hydraulic cylinder 9 is also reduced, so that the braking force of the rotary disk B becomes weaker and its rotational speed increases. Therefore, the tension of the wrapping wire 2 between the sheave 3A fixed to the rotating disk 3 and the cable 21 becomes smaller.

Further, if the tension of the wrapping wire 2 between the sheath 3A fixed to the rotating disk B and the cable 21 becomes smaller than a predetermined value, the piston 27
The piston rod 24, load cell 12, sheave support 5 and movable sheave 4 are moved in the direction away from the diverting sheave 13.17, and the liquid in the hydraulic chamber 8 in the control hydraulic cylinder 7 is pressurized. , the liquid pressure acts on the hydraulic chamber 10 of the braking hydraulic cylinder 9, and the braking force of the rotary disk O becomes stronger and its rotational speed becomes slower 9. Therefore, the sheave 6A fixed to the rotary disk O The tension of the wrapping wire 2 between it and the cable 21 increases.

In this way, the sea 7" fixed to the rotating disk B
The tension of the wrapping wire 2 between the wire 3A and the cable 21 is automatically adjusted to be always constant.

The tension detection signal from the load cell 12 is transmitted to the rotating frame 13.
It is converted into a frequency by a tension frequency conversion transmitter 14 attached to the wire and is transmitted, and is received by a reception display device 15 installed on a suspended scaffold or other location, and the tension of the wrapping wire is displayed on the reception display device 15. Ru.

The rotating frame 13 also has three indicator lamps for indicating excessive tension, insufficient tension, and appropriate tension. A rung display device 28 is attached.

FIG. 6 shows a circuit that continuously detects and displays the tension of the wrapping wire (wrapping wire), and the tension detection signal (analog signal) from the load cell 12 is transmitted to the amplifier 2.
9 and sent to converter 0, which converter 6
0 is converted into a frequency, and the output of the converter 60 is calculated by the calculator 61 and then displayed in the rung display device 2.
8 and the frequency output from converter 30 is sent to transmitter 62 for transmission.

Further, in the reception display device 15, the radio wave signal of the frequency is received by the receiver 36, the signal of that frequency is sent to the converter 64 and converted into a desotal signal, and the desotal display device connected to the converter 64 65, the linear body tension is displayed dinotally.

In addition, in Fig. 2, the wrapping machine is used.

Since wrapping rollers 20 are provided on both sides of the cable in the longitudinal direction, after wrapping the wrapping wire close to the cable band using the rear wrapping rollers,
The front wrapping roller can be used to wrap the wrapping wire until it reaches the cable band. However, one of the winding rollers may be omitted.

The present invention can also be applied to a linear body constant tension delivery device in any conventionally known type of wire wrapping machine for suspension bridge cables. The end portion may be connected to the rotating frame 13 via a load cell.

〔Effect of the invention〕

According to this invention, when the tension of the winding linear body 2 between the sheave 6A fixed to the rotating disk B and the cylindrical object decreases, the control hydraulic cylinder 7 is
The liquid in the hydraulic pressure chamber 8 is pressurized, and the hydraulic pressure in the hydraulic pressure chamber 8 acts on the hydraulic pressure chamber 10 of the braking hydraulic cylinder 9 to control the rotating disk B to which the sheave 6A is fixed. When the power increases and the tension of the linear body 2 between the sheave 6A fixed to the rotating disk B and the cylindrical object increases, the linear body 2 moves the movable sheave 4 and the sheave support 5. The control hydraulic cylinder 7 is pulled and extended through the hydraulic cylinder 7, and the hydraulic chamber 8 of the hydraulic cylinder 7 is reduced, and the hydraulic chamber 10 of the brake hydraulic cylinder 9 is also hydraulically pressurized, so that the sheave 6A is The braking force of the fixed rotating disk 6 decreases, so that the linear body 2
To automatically adjust the braking force of a rotary disk 6 to which a sheave 3A is fixed by utilizing changes in tension, and automatically keep the sending force of a winding linear body 2 almost constant by a simple means. Therefore, the sheath support 5 can be tightly wound in a stable state at all times without any gaps, and the sheath support 5 can be connected to the rotating frame 13 via the load cell 12 and the control hydraulic cylinder 7. , and by connecting the load cell 12t to the tension frequency conversion transmitter 14 attached to the rotating frame 13 and installing a reception display device 15 having a tension display device at a remote location, Effects such as being able to continuously confirm the winding tension of the linear body at any location can be obtained.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a schematic side view showing the thickness of a linear body constant tension sending device, and Fig. 2 is a linear body constant tension sending device of the present invention. 3 is a front view of the linear body constant tension delivery device as seen from the direction AA in FIG. 2,
FIG. 4 is a front view showing the rotating disk and the braking device, FIG. 5 is a front view of the tension detection and display device, and FIG. 6 is a diagram showing the linear body tension continuous detection and display circuit. In the figure, 1 is a pin, 2 is a winding linear body, 3 is a rotating disk, 6A is a sheath, 4 is a movable sheave, 5 is a sheave support, 6 is a shortening spring, and 7 is a hydraulic cylinder for control. , 8
9 is a hydraulic pressure chamber, 9 is a brake hydraulic cylinder, 10 is a hydraulic chamber, 1
1 is a pipe line, 12 is a load cell, 13 is a rotating frame, 1
4 is a tension frequency conversion transmitter, 15 is a reception display device, 1
3 to 19 are sheaves for deflection, 20 is a winding roller, 21 is a cylindrical object (cable), 25 is a brake shoe, and 28 is a lamp display device. Fig. 4 10゛° Evening ° 5 Elephant #l

Claims (2)

[Claims] (1) Sheave 3A and movable sheave 4 in which the winding linear body 2 unwound from the bobbin 1 is fixed to the rotating disk 3
The sheave support 5, which is wound around a cylindrical object through the cylindrical body and rotatably supports the movable sheave 4, is connected to a control hydraulic cylinder 7 equipped with a shortening spring 6, and the hydraulic cylinder 7 is A constant tension delivery device for a linear body for winding, characterized in that a hydraulic chamber 8 and a hydraulic chamber 10 of a braking hydraulic cylinder 9 for braking the rotary disk 3 are connected by a conduit 11. (2) Sheave 3A and movable sheave 4 in which the winding linear body 2 unwound from the bobbin 1 is fixed to the rotating disk 3
The sheave support 5, which is wrapped around a cylindrical object and rotatably supports the movable sheave 4, is connected to the rotating frame 13 via a control hydraulic cylinder 7 equipped with a load cell 12 and a shortening spring 6. The bobbin 1 and the rotating disk 3 are connected to a rotating frame 13, and a hydraulic chamber 8 of the control hydraulic cylinder 7 and a hydraulic chamber 10 of the braking hydraulic cylinder 9 that brakes the rotating disk 3 are connected to What is conduit 1
1, said load cell 12 is connected to a tension frequency conversion transmitting device 14 mounted on a rotating frame 13, and a receiving and display device 1 with a tension display device at a remote location.
5. A constant tension sending device for a winding wire body, characterized in that the device is provided with: 5.