JP4364449B2 - Wire connection clamp device - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to an electric wire connection clamping device used when a bypass line and a grounding wire are drawn out from an aerial distribution line or the like in a live line state, and more particularly, to an electric wire connection clamp device provided with a contact blade that penetrates an electric wire coating.
[0002]
[Prior art]
In wire construction, various wire connection clamp devices have been developed that are used to pull out bypass wires and ground wires from overhead distribution wires, etc. in the live line state. The contact blade that is pressed against the covered electric wire held by the electric wire holding portion and inserted into the covering, and contacts the core wire inside the covered electric wire, is connected to the screw type driving member, and is connected to the screw type driving member. A rotating torque limiter is provided, and the contact pressure with respect to the core wire of the contact blade is made constant.
[0003]
[Problems to be solved by the invention]
In such a conventional connection clamp apparatus, there is no thing which confirms the contact state of a contact blade and an electric wire core wire through visual and auditory sense.
[0004]
Moreover, when pulling out a bypass line from an overhead distribution line in a live line state, normally, two connection clamp devices are used for each of three high-voltage lines, for a total of six connection clamp devices. These clamp devices are held (temporarily placed) on a discharge tool or scaffolding bolt attached to a utility pole at a construction site to prevent the clamp device from being charged. In a manner similar to the above, the rod-shaped steel member such as the discharge tool is held between the electric wire holding portion and the contact blade to be held on the discharge tool or the like. For this reason, the cutting edge of the contact blade is bent by the steel member, and therefore, there is a possibility that proper contact between the contact blade and the electric wire may be impossible when connecting to the electric wire.
[0005]
[Problems to be solved by the invention]
It is a basic object of the present invention to provide an electric wire connection clamping device having means capable of solving such problems of the conventional connection clamping device and confirming the contact state between the contact blade and the core wire. Yes.
[0006]
Another object of the present invention is to provide a wire connection clamp device that prevents the tip of the contact blade from being bent as described above when temporarily placing the connection clamp while preventing the connection clamp from being charged. It is said.
[0007]
[Means for Solving the Problems]
That is, the electric wire connection clamping device according to the present invention includes an electric wire holding portion that holds the covered electric wire, and a contact that is pressed against the covered electric wire held by the electric wire holding portion and is inserted into the covering, and that contacts the core wire inside the covered electric wire. The blade, a screw type driving member for pressing the contact blade against the covered electric wire, and the contact blade pressed against the covered electric wire by the screw type driving member are operated when the contact pressure with the core wire reaches a predetermined value. And means for informing the user.
[0008]
Specifically, it has a torque limiter connected to the screw type drive member and rotated by an operator, and the screw type drive member is rotated through the torque limiter, whereby the contact blade is covered with the coating. When the rotational torque transmitted from the torque limiter to the screw-type drive member exceeds a predetermined value, the torque limiter turns idle and the screw drive member enters the wire and comes into contact with the core wire. Further, the means for operating and informing when the contact pressure with the core wire reaches a predetermined value has a contact detection circuit, and the contact detection circuit A switch closed by the idle rotation of the torque limiter, and contact display means such as a light emitting diode or a buzzer, and the contact blade is in contact with the core wire, Switch the contact detection circuit is closed by the is closed can be made to the contact display means is activated.
[0009]
The contact display means may be a light emitting means such as a light emitting diode, and the light emitting means is set in a cup-shaped casing of the connection clamp device opened downward and set in an environment darker than the surroundings. The operator can easily recognize the light emitting means in the casing from below the connection clamp device.
[0010]
By connecting a plurality of light emitting means in parallel to the power source of the contact detection circuit, even if one light emitting means fails, the other light emitting means can detect the contact state. .
[0011]
More specifically, the wire connection clamping device according to the present invention has a clamp body, sets the wire holding portion at an upper position of the clamp body, and places the screw-type drive member at a lower position of the wire holding portion. The clamp body can be displaced in the vertical direction and attached to the clamp body, and the clamp body is provided with a temporary placing support portion and a temporary placement holding portion spaced apart from the temporary placement support portion in the vertical direction. The temporary placement holding portion is moved in the vertical direction by the screw drive member, and the temporary placement member can be sandwiched between the temporary placement holding portion and the temporary placement support portion. You can also.
[0012]
Furthermore, in the present invention, a wire holding part that holds the electric wire, a contact blade that is pressed against the covered electric wire held by the electric wire holding part and inserted into the covering, and contacts the core wire inside the covered electric wire, and a screw type driving member And a torque limiter connected to the screw-type drive member and rotated by an operator, and the screw-type drive member is rotated via the torque limiter so that the relative contact between the contact blade and the covered electric wire is increased. When the rotational torque transmitted from the torque limiter to the screw-type drive member exceeds a predetermined value, the contact blade enters the covered electric wire and comes into contact with the core wire. A wire connection clamp device in which torque transmission to the screw drive member is interrupted by a looper idling, and the torque limiter With the switch to be closed and the voltage detection device, when the contact blade is in contact with the core wire, the switch is closed to form a current loop through the voltage detection device, and the voltage detection device is activated. There is provided a connection clamp device characterized by comprising contact detection means adapted to do so.
[0013]
Also in this clamping device, provisional means can be provided in the same manner as described above.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a wire connection clamping device according to the present invention will be described.
1 and 2 show a first embodiment of a wire connection clamping device according to the present invention.
[0015]
First, an outline of this apparatus will be described. As shown in the figure, this clamp device is inserted into a wire holding part 10 that holds a covered electric wire W and a covering of the covered electric wire W held by the electric wire holding part, and contacts a core 14 inside the covered electric wire. A screw type drive member 18 for clamping and holding the covered electric wire W to the electric wire holding part 10, and a torque limiter 22 (FIG. 2) connected to the screw type drive member and rotated by an operator. The torque limiter 22 rotates idle when the rotational torque transmitted to the screw-type drive member 18 exceeds a certain level, so that torque cannot be transmitted to the screw drive member.
[0016]
Specifically, this electric wire clamping device has a substantially inverted C-shaped clamp body 20, an electric wire holding portion 10 at the upper end of the main body 20, and a screw-type drive member at the lower end of the main body 20. 18 is attached.
[0017]
The electric wire holding part 10 has a holding groove 24 opened downward for storing and holding the electric wire W to be connected, and a contact blade 14 is provided at the upper end of the groove. In the illustrated example, the contact blade 14 has a triangular cross section and is configured to extend in a direction substantially perpendicular to the drawing sheet.
[0018]
The screw-type drive member 18 is screwed into a screw hole 26 provided so as to penetrate the lower horizontal arm portion 24 of the clamp body 20 in the vertical direction. A guide member 34 attached to the clamp body 20 so as to be slidable in the vertical direction is attached to the upper end of the screw-type drive member via a spring washer 38. On the guide member, a contact blade 14 and An electric wire pressing member 42 in the form of a contact blade having a U-shaped cross section provided so as to face each other in the vertical direction is provided. Further, a cylindrical torque limiter connecting member 30 having a downward opening is attached to the lower end of the screw type driving member 18.
[0019]
The torque limiter 22 (FIG. 2) is attached to the tip of a long rotary operation rod O for an operator to lift and operate the connection clamp device from a position below the overhead electric wire during construction. It is connected to the member 30.
[0020]
As shown in the figure, the torque limiter includes a base portion 46 connected to the tip of the rotary operation rod O and a torque transmission portion 48 connected to the torque limiter connecting member 30.
[0021]
The base portion 46 has a cylindrical connecting member 50 for receiving the rotation operation rod O, and a connecting rod 54 having a hexagonal cross section that is rotatably held in the cylindrical connecting member 50 along the central axis of the connecting portion. And a torque transmission shaft 58 that is integrated with the connecting rod 54 and extends upward. The coupling rod 54 is inserted into a coupling hole (having a hexagonal cross section) formed in the rotary operation rod O received in the cylindrical coupling member 50, and the rotational rod O and the torque limiter 22 are rotated in the rotational direction. Connect.
[0022]
The torque transmission portion 48 has a connection projection 56 that is inserted and connected to the downward opening 30 ′ of the torque limiter connection member 30. The connection protrusion 56 protrudes upward from the center of the upper end wall of the cup-shaped casing or cylindrical member 60 that opens downward, and the cylindrical connection member 60 and the cylindrical connection member 50 of the base 46 are concentric. This is also connected via an intermediate cylindrical member 62 which is also concentric. Specifically, the intermediate cylindrical member 62 is connected to a torque transmission shaft 58 extending upward from the base portion 46 via a known torque limiter mechanism 63, and the rotational torque from the base portion 46 is the torque limiter. The torque is transmitted to the torque transmission unit 48 and the screw-type rotary drive member 18 through the mechanism. When the transmitted torque reaches a predetermined value, the connecting rod 54 idles with respect to the torque transmission unit 48 and the torque transmission is interrupted. In the construction, the operator uses the rotary operation tube O to rotate the torque limiter 22 and rotate the screw drive member 18 to raise the electric wire pressing member 42, thereby covering the covered electric wire. When W is pushed up and clamped in the holding groove 24 of the electric wire holding part 10 so that the contact blade 14 breaks the coating of the covered electric wire and comes into contact with the core wire, an excessive pressing force is applied to the core wire. Regardless, the core wire and the contact blade are in proper contact.
[0023]
As described below, the present invention is characterized by providing means for confirming that the contact blade 14 is in reliable contact.
That is, as shown in FIG. 1B, a conductor 70 that is passed through an insulating sheath 64 that extends vertically through the center of the screw-type drive member 18 is connected to the wire support member 42, and the lower end of the conductor 70 is a spring. 72 is connected to the connection terminal 74.
[0024]
On the other hand, as shown in FIG. 2A, the torque limiter 22 includes a spring 76 provided in the connection protrusion 56 when the connection protrusion 56 of the tubular member 60 is inserted and connected into the tubular connection member 30. Thus, the terminal member 78 is pressed against the connection terminal 74. The terminal member 78 is connected to the light emitting diode 82 via the battery 80 and the switch 81, and the circuit composed of these elements is a torque transmitted through the torque limiter 22 in a state where the contact blade 14 is in contact with the wire core wire. When the value reaches a predetermined value, the switch 81 is closed to close it, so that the light emitting diode 82 emits light. As shown in FIGS. 4 and 2, the switch 81 is fixed to the intermediate cylindrical member 62, and the push button 84 of the switch is fitted in a recess 86 formed in the torque transmission shaft 58. (FIG. 4A). When the torque transmitted through the torque limiter 22 is less than or equal to a predetermined value, the connecting rod 54 rotates together with the torque transmitting portion 48, so that the push button 84 of the switch is maintained in the state of FIG. 4A and the switch is opened. In this state, when the torque to be transmitted becomes a predetermined value or more and the connecting rod 54 rotates idly with respect to the torque transmission portion 48, the switch button 84, as shown in FIG. The switch is closed by being engaged with the outer peripheral surface of the shaft 58 and pushed.
[0025]
As shown in the drawing, a plurality of light emitting diodes 82 are set in parallel inside the cylindrical member 60 at a predetermined interval in the circumferential direction, and six in the example shown in FIG. The reason for setting the inside of the cylindrical member 60 is to make the periphery of the light-emitting diode 82 a dark environment that is not exposed to direct sunlight, so that even a relatively small amount of light emission can be easily seen by a worker working below. The reason why the diodes are arranged in parallel is to prevent any diode from being damaged.
[0026]
FIG. 6 shows another embodiment of the wire clamp device according to the present invention. As shown in the figure, this apparatus is different from that of the first embodiment in that a means for attaching the connection clamp to the temporary placing rod S is provided during the wire work. That is, in this device, a temporary bar engaging recess 87 is formed near the upper end of the back side of the inverted C-shaped clamp body 20 (the side opposite to the side on which the contact blade 14 or the like is provided). The temporary placing rod S is engaged with the recess 87. Further, in this apparatus, a through hole 88 is formed so as to penetrate the clamp body 20 in the vertical direction, and the upper end thereof faces the temporary placing rod engaging recess 87, and the through hole is movable in the vertical direction. A holding bar 92 is inserted, and the lower end of the bar 92 is supported by a holding arm member 94 that is loosely fitted to the screw-type rotary drive member 18 and extends in the horizontal direction. That is, when the screw-type drive member 18 is rotationally driven to move the drive member 18 relatively upward with respect to the clamp body, the holding bar 92 rises and is temporarily placed for engagement with the recess 87. The clamp device is fixed to the temporary placement rod S by sandwiching the rod S between the temporary placement support portion 96 at the upper portion of the concave portion.
[0027]
7 and 8 show another embodiment of the electric wire clamp device according to the present invention.
In this clamp apparatus, since the torque limiter 22 is different from the above-described embodiment, only this part will be described.
[0028]
That is, in this electric wire clamping device, a switch 98 that is brought into the closed state from the open state by the idle rotation of the torque limiter is provided in the same manner as the clamping device in the above-described embodiment. As shown, it is connected to the voltage detection device 100. That is, in the illustrated example, the voltage detection device is attached to the rotary operation rod O operated by the operator, and is connected for contact through the switch 98 and is grounded. In this clamping device, when the torque limiter 22 starts to idle while the contact blade 14 is in contact with the core wire of the covered electric wire W and the switch 98 is closed, the voltage detection device 100 detects it and In this example, the light-emitting lamp 102 provided in the voltage detection device is turned on, and a buzzer built in the voltage detection device sounds to notify the operator.
[0029]
【The invention's effect】
The connection clamp device according to the present invention is configured as described above, and when the contact blade is in contact with the core wire of the electric wire and the torque for pressing the contact blade against the core wire reaches a predetermined value. This can be confirmed, and therefore the contact blade can be properly brought into contact with the core wire.
[0030]
Also, when using the connection clamp device during construction, instead of gripping the rod using a contact blade, as in the conventional device, for the temporary placement rod S installed at the construction site, Since the temporary holding support member 96 and the holding bar 92 are sandwiched, the blades of the contact blades 14 can be eliminated.
[Brief description of the drawings]
1A and 1B are views showing a wire holding part of a wire connection clamping device according to the present invention, in which FIG. 1A is a side view thereof, and FIG.
2A and 2B are diagrams showing a torque limiter of the electric wire connection clamp device, wherein FIG. 2A is a longitudinal side view thereof, and FIG. 2B is a side view thereof.
FIG. 3 is a diagram showing a contact detection circuit in the electric wire connection clamping device.
4A and 4B are diagrams showing a switch used in the contact detection circuit, in which FIG. 4A shows an open state and FIG. 4B shows a closed state.
FIG. 5 is a diagram showing a parallel connection state with respect to the light emitting diodes in the contact detection circuit;
FIG. 6 is a side view showing another embodiment of the electric wire clamping device according to the present invention.
FIG. 7 is a side view showing still another embodiment of the wire clamp device according to the present invention.
8 is a diagram showing a contact detection circuit in the clamp device of FIG. 7; FIG.
[Explanation of symbols]
Covered wire C
Rotating operation stick O
Electric wire holding part 10
Contact blade 14
Screw-type drive member 18
Torque limiter 22
Holding groove 23
Lower horizontal arm 24
Screw hole 26
Torque limiter connecting member 30
Torque transmission shaft 34
Torque transmission part 38
Tubular connecting member 40
Wire support member 42
Connecting rod 44
Base 46
Torque transmission 48
Tubular connecting member 50
Connecting rod 54
Connecting protrusion 56
Torque transmission shaft 58
Cylindrical member 60
Intermediate cylindrical member 62
Torque limiter mechanism 63
Spring 76
Connection terminal 74
Terminal member 78
Battery 80
Switch 81
Light emitting diode 82
Button 84
Recess 86
Temporary stick engaging recess 87

Claims (8)

An electric wire holding part for holding the covered electric wire;
A contact blade that is pressed against the covered electric wire held by the electric wire holding portion and inserted into the covering, and contacts the core wire inside the covered electric wire;
A screw-type drive member for pressing the contact blade against the coated electric wire;
Means for operating when the contact pressure of the contact blade pressed against the covered electric wire by the screw type driving member with the core wire reaches a predetermined value, and notifying it;
Is connected to the threaded drive member to have a torque limiter that is rotated by the operator,
By rotating the screw type driving member via the torque limiter, the contact blade enters the covered electric wire and comes into contact with the core wire. From the torque limiter to the screw type driving member. When the transmitted rotational torque is equal to or greater than a predetermined value, the torque limiter idles and the torque transmission to the screw drive member is interrupted,
The informing means includes a contact detection circuit, and the contact detection circuit includes a switch that is closed by the idle rotation of the torque limiter, and contact display means, and the contact blade is in contact with the core wire, An electric wire connection clamping device, wherein the contact detection circuit is closed and the contact display means is operated by closing the switch . The wire connection clamp device according to claim 1, wherein the contact display means has a buzzer. The contact display means has light emitting means , and the light emitting means is set in a cup-shaped casing of the connection clamp device opened downward and set in an environment darker than the surroundings. The electric wire connection clamp device according to claim 1 , wherein the light emitting means in the casing is easily visible from below. 4. The electric wire connection clamping device according to claim 3, wherein the light emitting means is a light emitting diode. 5. The electric wire connection clamping device according to claim 3 , wherein a plurality of the light emitting means are connected in parallel to a power source of the contact detection circuit. A clamp body, the electric wire holding part is set at an upper position of the clamp main body, and the screw-type drive member is vertically movable at a lower position of the electric wire holding part and attached to the clamp main body, The clamp body is provided with a temporary placing support portion and a temporary placement holding portion spaced apart from the temporary placing support portion in the vertical direction, and the temporary placement holding portion is provided by the screw drive member. moved in the vertical direction, according to any one of claims 1 to 5, characterized in that to be able to sandwich the temporary member between the temporary supporting portion with the temporary use pressing section Wire connection clamp device. An electric wire holding part for holding the covered electric wire, a contact blade that is pressed against the covered electric wire held by the electric wire holding part and is inserted into the covering, and contacts the core wire inside the covered electric wire, a screw type driving member, and the screw type A torque limiter connected to the drive member and rotated by an operator, and the screw-type drive member is rotated through the torque limiter to cause relative movement between the contact blade and the covered electric wire. The contact blade enters the covered electric wire and comes into contact with the core wire, and when the rotational torque transmitted from the torque limiter to the screw-type drive member becomes a predetermined value or more, the torque limiter runs idle. Then, in the electric wire connection clamping device that is configured to cut off the torque transmission to the screw driving member,
A switch that is closed by the idle rotation of the torque limiter and a voltage detection device, and in a state where the contact blade is in contact with the core wire, a current loop passing through the voltage detection device is formed by closing the switch. An electric wire connection connection clamping device, characterized by comprising contact detection means adapted to operate the voltage detection device. A clamp body, the electric wire holding portion is set at an upper position of the clamp main body, the screw type driving member is vertically displaceable at a lower position of the electric wire holding portion and is attached to the clamp main body, The clamp body is provided with a temporary placing support portion and a temporary placement holding member spaced vertically from the temporary placement support portion, and the temporary placement holding member is provided by the screw drive member. 8. The electric wire connection clamping device according to claim 7 , wherein the electric connection clamp device is moved in a vertical direction so that the temporary placement member can be sandwiched between the temporary placement holding member and the temporary placement support portion.

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