JP2587911B2 - Overhead wire winch wire clamp regulating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead wire winch wire clamp regulating device for preventing a wire from being fed back due to slack of a wire between an overhead wire winch and a reel winder in an overhead wire operation.

[0002]

2. Description of the Related Art Conventionally, there has been provided an overhead wire apparatus which performs an overhead wire operation while winding a wire around a reel winder via an overhead wire winch.

[0003]

However, in the above-mentioned conventional apparatus, when the winding force of the reel winder is reduced due to a failure such as a decrease in the hydraulic pressure of the reel winder or the winding drum stops during the overhead wire work. For example,
There is no longer any force on the wire between the overhead winch and the reel winder, causing an accident in which the wire is fed back and the wire rope in the middle of the overhead wire slides out. If the power of the wire between the overhead wire winch and the reel winder is lost, the above-mentioned accident can be prevented by stopping the overhead wire winch, but the operation of the overhead wire winch and the reel winder requires a Generally, the operation of the overhead winch is separately performed by an operator and is remotely controlled. When the wire is loosened between the overhead winch and the reel winder as described above, the overhead winch can be quickly stopped. It is very difficult, and there is a problem that the wire is sent backward.

[0004] Further, if the above-mentioned operation is performed by a plurality of operators, there is a possibility that the wire between the overhead winch and the reel winder may be loosened due to an operation error of the operator,
An accident similar to that described above occurs.

[0005]

According to a first aspect of the present invention, there is provided an overhead wire winch wire clamp regulating device which performs an overhead wire operation while winding a wire on a reel winder via the overhead wire winch. Between the reel winder and the reel winder, a detecting device for detecting the slack of the wire is provided, and a securing device for securing the wire when the loosening of the wire is detected by the detecting device is provided. .

According to a second aspect of the present invention, in the overhead wire winch wire clamp regulating device, the detecting device includes a pressing roller provided at a lower end of a vertically movable rod, and a spring for pressing the pressing roller downward. And a limit switch provided at the upper end of the rod for detecting the vertical movement of the rod.

[0007]

When the wire is slackened between the overhead winch and the reel winder, the detecting device detects the slack of the wire, and when the slack of the wire is detected by the detecting device, the wire is fixed by the securing device. By tying,
Prevents wire backfeed.

[0008]

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

FIG. 1 shows a configuration of an overhead wire winch wire clamp regulating device according to the present invention.

In FIG. 1, reference numeral 1 denotes an overhead wire winch. The overhead wire winch 1 includes a capstan 11 which is driven to rotate by a driving device (not shown). It is led to the winder 2. This overhead wire winch 1 is mounted on an overhead wire car C that is configured to run freely by a caterpillar.

The reel winder 2 winds a wire A guided through the capstan 11.
The apparatus includes a winding drum 22 rotatably provided by a driving device 21, and is configured to wind the wire A around the winding drum 22 while maintaining a predetermined hand force through the capstan 11.

Between the capstan 11 on which the wire A is stretched and the reel winder 2 as described above, a detecting device 3 for detecting the slack of the wire A, and a clamp device for securing the wire A (a securing device) ) 4 are provided.

The detecting device 3 is mounted on an overhead wire carriage C. As shown in FIGS. 2 and 3, a pressing roller 34 provided at a lower end of a rod 31 movably supported up and down.
And a spring 36 for pressing the pressing roller 34 downward.
And the limit switch 3 provided at the upper end of the rod 31
7.

The rod 31 is vertically slidably supported by a bracket 32 fixed to the side of the overhead wire C. A holding roller 34 is provided at a lower end of the rod 31 via a mounting member 33. I have.

The pressing roller 34 is disposed in a horizontal direction, and moves up and down while being guided by guide rods 35 provided on both sides of the rod 31 as the rod 31 moves up and down.

The spring 36 is connected to the rod 31.
And presses the pressing roller 34 downward so as to be pressed.

The limit switch 37 has a contact 38 disposed so as to be in contact with the upper end of the rod 31. When a predetermined force is applied to the wire A during the wire A work, the limit switch 37 is provided. Then, the wire A contacts the pressing roller 34 from below, and the upper end of the rod 31 contacts by moving the pressing roller 34 upward, which is detected.

The clamp device 4 is provided on the side of the overhead wire C between the capstan 11 and the detection device 3, and holds the wire A up and down as shown in FIG. It comprises a movable member 41 and a lower fixed member 42, and an operating means 43 (see FIG. 5) for moving the upper movable member 41 up and down to secure and release the wire A.

The operating means 43 is, as shown in FIG.
A hydraulic cylinder 44 in which a telescopic rod 44a is connected to a mounting member 41a on which the upper movable member 41 is mounted; a guide 45 disposed on both sides of the hydraulic cylinder 44 for guiding the upper movable member 41 up and down; And a spring 46 interposed at 45.

In the unclamped state in which the upper movable member 41 is disposed at an upper position due to the extension of the hydraulic cylinder 44 and the wire A is not fixed,
The upper movable member 41 is urged downward by the return force. Accordingly, when the oil in the hydraulic cylinder 44 is drained, the upper movable member 41 is returned to the lower fixed member 42 by the return force of the spring 46.
Then, the wire A is clamped with the lower fixing member 42 and secured.

The hydraulic cylinder 44 is expanded and contracted by a switching operation of a switching valve (not shown).

Incidentally, reference numerals 47 and 4 in FIGS.
8, 49 are guide rollers for guiding the wire A.

The above-mentioned capstans 11 are provided on both left and right sides of the overhead wire car C as shown in FIG.
Along with this, the detecting device 3 and the clamping device 4 are also provided on both left and right sides of the overhead contact car C, and the reel winder 2 is provided in a pair on the left and right.

Reference numeral 5 shown in FIG. 6 denotes a clamp device 4 and a capstan 11 based on a detection signal from the detection device 3.
This is control means for controlling the operation of.

The capstan 11, the detecting device 3, the clamping device 4, and the reel winder 2 need only be provided with at least one set, and are not limited to those arranged right and left as shown in FIG. .

FIG. 7 shows an electric circuit diagram of the control means.

In FIG. 7, LS1 is one side as described above,
For example, it is a contact point of a limit switch 37 disposed on the left side in the traveling direction of the overhead line car C, and is opened when the upper end of the rod 31 contacts a contact 38 of the limit switch 37. LS2
Is a contact point of the limit switch 37 disposed on the right side in the traveling direction of the overhead line car C.
8 is opened when the upper end of the rod 31 abuts.

T1 and T2 are timers, and t1a and t2a are contacts that close after a predetermined time (eg, about 3 seconds) after the timers T1 and T2 are excited.

R1, R2, R3 and R4 are relays,
Normally open relay contacts r1a, r2a, r3a, r4a,
And normally closed relay contacts r3b and r4b.

SW1 and SW2 are hold switches, S
OL1 and SOL2 are solenoids of a switching valve connected to the left and right hydraulic cylinders.

Next, the operation of the thus configured device will be described. Note that the devices arranged on the left and right of the overhead line C perform the same operation, and therefore the operation of the devices arranged on the left side of the overhead line C will be described here.

First, when the reel winder 2 is activated, a tail force is applied to the wire A, and the wire A is stretched between the reel winder 2 and the capstan 11 with a predetermined tail force. As a result, the wire A pushes the pressing roller 34 upward against the urging force of the spring 36, and the upper end of the rod 31 connected to the pressing roller 34 contacts the contact 38 of the limit switch 37.

When the upper end of the rod 31 is in contact with the contact 38 of the limit switch 37, the contact LS1 of the limit switch 37 is open. Therefore, in the electric circuit diagram of FIG. 7, SOL1 is excited and the hydraulic cylinder is extended, whereby the clamp device 4 is arranged at the open position.

In this state, the wire is wound around the reel winder 2 via the capstan 11 to perform an overhead wire work.

In the above-mentioned overhead wire work, if the rear end force of the wire A is attenuated between the reel winder 2 and the capstan 11 due to a failure of the reel winder 2 and the wire A tries to loosen, the loosening of the wire A occurs. By
The pressing roller 34 is pressed downward by the urging force of the spring 36 and the weight of the pressing roller 34 and the like, whereby the rod 31 similarly moves downward and separates from the contact 38 of the limit switch 37.

When the rod 31 separates from the contact 38 of the limit switch 37 in this manner, the limit switch 3
7 is closed, the timer T1 is excited, and after the timer T1 is excited, the timer contact T1
When a is closed, the relay R1 is excited and the relay contact r1a is closed, whereby the relay R3 is excited and the relay contact r3b is opened to demagnetize the solenoid SOL1.

When the solenoid SOL1 is demagnetized, the switching valve is switched, and the piston chamber of the hydraulic cylinder 44 communicates with the oil reserve to drain oil from the piston chamber. The retractable force of the spring 46 causes the upper movable member 41 to move downward and secure the wire A to the lower fixed member 42. At the same time that the wire A is secured by the clamp device 4, the rotation of the capstan 11 is also stopped.

As described above, when the wire A is to be loosened between the reel winder 2 and the capstan 11, the looseness of the wire A is detected and the wire A is moved between the reel winder 2 and the capstan 11. , The wire A can be reliably prevented from being fed back due to the slack of the wire A, and can be safely operated.

When the clamp device 4 is activated by the operation of the limit switch 37 to secure the wire A, the hold switch SW1 is turned on, so that the clamp of the wire A by the clamp device 4 is performed by the limit switch 37. Irrespective of.

[0040]

As described above, according to the present invention, if the wire is slackened between the overhead winch and the reel winder, the slack of the wire is detected by the detecting device, and the detecting device detects the slack of the wire. By securing the wire with the securing device when the loosening of the wire is detected, reverse feeding of the wire can be reliably prevented, and a highly safe device can be provided.

According to a second aspect of the present invention, the detecting device comprises a pressing roller provided at a lower end of a vertically movable rod, and a spring for pressing the pressing roller downward.
By using the limit switch provided at the upper end of the rod and detecting the vertical movement of the rod, the slack of the wire can be reliably detected, and the securing device can be reliably operated.

[Brief description of the drawings]

FIG. 1 is a side view showing an overall configuration of an apparatus.

FIG. 2 is a front view illustrating a configuration of a detection device.

FIG. 3 is a side view illustrating a configuration of a detection device.

FIG. 4 is a front view showing the configuration of the clamp device.

FIG. 5 is a side view showing a configuration of an operating means of the clamp device.

FIG. 6 is a block diagram illustrating an arrangement state of a detection device, a clamp device, and the like.

FIG. 7 is an electric circuit diagram showing a configuration of a control unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Overhead wire winch 2 Reel winder 3 Detector 31 Rod 34 Holding roller 36 Spring 37 Limit switch 4 Clamping device (Fixing device) A Wire

Claims (2)

(57) [Claims] 1. An apparatus for performing an overhead wire operation while winding a wire on a reel winder via an overhead wire winch, wherein: between the overhead wire winch and the reel winder,
An overhead wire winch wire clamp regulating device provided with a detecting device for detecting a slack of a wire and a fixing device for fixing the wire when the detecting device detects the slack of the wire. 2. The apparatus according to claim 1, wherein said detecting device is provided at a lower end of a vertically movable rod, a spring for pressing said pressing roller downward, and detects a vertical movement of said rod provided at an upper end of said rod. The overhead wire winch wire clamp regulating device according to claim 1, comprising a limit switch that performs the control.