JP2004235045A - Coating penetration clamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a structure of a whole of a coating penetration clamp by forming the structure in a shape of a fluted contact blade with excellent durability. <P>SOLUTION: This clamp comprises a holding portion 2 in which a recess 2a is formed so as to enable a surface holding a coated wire 4 to engage a fin portion of the coated wire 4, a contact blade 6 forming a recessed flute in a length direction, having two parallel blade edges at the tip and having a shape in an approximately U shape, an operating rod 8 having an electrode 9 pressuring a bottom surface of the contact blade 6 at the tip end thereof and penetrating a movable guide, a screw shaft 7 driving the operating rod 8 up and down, connecting with the movable guide and having an operating portion at a rear end thereof, and a grasping portion 14 containing the screw shaft 7. The coated wire 4 is grasped by the holding portion 2 and the movable guide by rotating the operating portion of the screw shaft 7, the electrode 9 and the contact blade 6 are driven by driving the operating rod 8 and the contact blade 6 is bitten into the grasped coated wire 4. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a sheath-penetrating clamp having a contact blade that grips an overhead covered electric wire or the like in a live state and penetrates the electric wire.
[0002]
[Prior art]
When connecting a plurality of electric wires in electric wire construction, the covering portion of the electric wires was peeled off, and the electric wires were exposed and connected. However, the operation of peeling off the coated portion each time is complicated, and the operation time is wasted. In addition, the conductor of the wire was polished and connected using a peeling tool. For this reason, this connection work is a problem, and various types of connecting wires to the contact blade without stripping work have been developed.
[0003]
For example, a contact electrode is arranged at the tip of a screw rod that moves up and down by screwing into a screw hole of a base of a clamp body composed of a holding portion for gripping a covered electric wire and a base placed opposite to the holding portion. A connection in which the connecting rod, which is arranged at the lower end of the clamp body, rotates the screw rod up and down, holds the electric wire by the holding portion provided on the base and the holding portion, and moves the contact electrode. There is a clamp (Patent Document 1).
In the clamp device, when the electric wire core wire and the contact blade are brought into contact with each other, the screw type driving member is rotated by interposing a torque mitter rotated by an operator, and transmitted to the screw driving member when the contact blade comes into contact with the electric wire core wire. In some cases, when the applied rotation torque exceeds a predetermined value, the torque transmitter idles. In this contact blade, a single pointer contact is arranged on the clamp holding portion side, and a wire holding member having a concave cross section is described on the side of the screwing machine driving member that moves up and down (Patent Document 2).
[0004]
[Patent Document 1] Japanese Patent No. 33224029 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-305817
The contact electrode of Patent Document 1 is formed in a cylindrical shape, a cross-shaped concave groove is formed on the upper surface, a cutting blade is formed on one side of the concave groove, and the cylindrical contact electrode is rotated (paragraph number). (Refer to “0024”) The electric wire is peeled off by a cutting blade. Further, the contact electrode described in Patent Document 2 is arranged on the holding portion side, and this needle-like contact electrode is inserted into an electric wire.
As described above, in the conventional contact electrode, the contact blade disposed at the tip end has been developed with a clamp penetrating a plurality of contact blades, but the mechanism is complicated and the contact of the contact blade with the electric wire is unstable.
[0006]
[Problems to be solved by the invention]
The present invention does not require a peeling step of converting a covered electric wire into a bare electric wire, and can conduct electricity with a simple configuration.
An object of the present invention is to provide a cover-through type clamp having a simple configuration. SUMMARY OF THE INVENTION An object of the present invention is to provide a coated penetrating type clamp having a feature that the grooved contact blade has a shape excellent in durability.
[0007]
[Means for Solving the Problems]
The above object of the present invention can be achieved by the following configurations.
A movable guide is provided facing the holding portion of the clamp body that holds the covered electric wire, and a contact blade is provided between the holding portions on both ends of the movable guide, and a driving member for driving the contact blade is provided. In the sheath penetrating type clamp built in the gripping part, the holding part in which the surface for holding the insulated wire is formed with a concave so that the fin of the wire can be fitted therein, and the concave groove is formed in the longitudinal direction, and the tip is formed. A contact blade having two parallel cutting edges and having a substantially U-shape, an operating rod that presses the bottom surface of the contact blade with its tip to penetrate the movable guide, and drives the operating rod up and down The movable guide is connected to the movable guide, and includes a screw shaft having an operating portion at a rear end thereof, and a grip portion having the screw shaft therein, and the movable guide is formed by rotating the operating portion of the screw shaft to form a clamp body. Move the holding part close to and away from The coated wire is gripped by the screw and the operating rod is driven by the screw shaft.The coated wire is gripped, and the operating rod is driven to drive the electrode and the contact blade so that the gripped coated wire bites the contact blade. It is a coated penetration type clamp characterized in that:
[0008]
In addition, the problem is that a holding portion having a concave portion into which fin portions protruding on both sides of the covered electric wire can be inserted, and a guide portion that is arranged to face the holding portion and presses the covered electric wire is provided at both ends. It has a movable guide that is close to and far from the holding part, a screw shaft that is connected to the movable guide and moves up and down, and a groove that is formed in the longitudinal direction, and has two cutting edges parallel to the tip. It has a U-shape and has a contact blade that enters and exits between the guide portions of the movable guide, an operating rod that presses the bottom surface of the contact blade with a tip, and penetrates the movable guide, and moves the operating rod up and down. A screw shaft which is driven and connected to the movable guide and has an operation portion at a rear end, a grip portion for housing the screw shaft, and a long groove in which a key fixed to the screw shaft slides are provided, and an outer periphery of the screw shaft is provided. The interior of the arranged collar, the collar and the screw shaft, A holding portion of the clamp body having a holding portion at the tip thereof, and a movable guide approaching and separating from the holding portion of the clamp body by rotating the operating portion of the screw shaft, and the covered electric wire is moved when approaching. The configuration of the sheath penetrating type clamp in which the electrode and the contact blade are driven by grasping and driving the operating rod, so that the contact blade bites into the grasped covered electric wire, and the rotation of the clamp body is prevented by the key. Can be achieved by
[0009]
The object of the present invention is attained by a configuration having a two-step inclined portion from the outer tip of both cutting edges of the contact blade to the bottom, or a configuration in which an insulating member is disposed between the screw shaft and the grip portion. it can.
[0010]
The present invention is a coated penetrating clamp having a contact blade capable of securely contacting and maintaining a stable position.
In particular, not only can the insulated wire be securely held in a stable position by the concave groove portion of the contact blade and the R portion of the holding portion of the clamp main body, but also the two contact blades ensure reliable and stable contact. Can be.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A coated through clamp according to the present invention will be described based on an embodiment shown in the drawings. FIG. 1 is a schematic side view showing an internal mechanism for explaining an outline of a coated penetration type clamp of the present invention. FIG. 2 is a front view of the sheath penetration type clamp of the present invention. FIG. 3 is an enlarged perspective view of the contact blade employed in the coated penetration type clamp of the present invention. FIG. 4 is an enlarged side view of a main part showing a state in which the coated electric wire of the coated through-type clamp of the present invention is gripped. FIG. 5 is an enlarged front view showing the grip portion of FIG. FIG. 6 is a bottom view of the embodiment of the coated penetration type clamp of the present invention.
[0012]
As shown in the drawing, the clamp body 1 includes a holding portion 2 at an upper end and a base 3 at a lower end. The holding portion 2 has a predetermined thickness. The base 3 is disposed so as to face the holding section 2. A screw hole is formed in the base 3, and a screw shaft 7 is screwed thereto.
[0013]
A movable guide 5 which slides along a straight line portion on the inner surface of the clamp body 1 and has a rectangular through hole in the center is disposed, and the covered electric wire 4 is pressed from both sides of the movable guide 5 from below. Guides 5a, 5a. A contact blade 6 that protrudes and retracts in the through hole of the movable guide 5 is arranged. The contact blade 6 is moved up and down by an operation rod 8 penetrating the center of a screw shaft 7 for driving the movable guide 5 up and down. Is pressed. 9 is a bolt hole. The contact blade 6 includes two blades 6a, 6a formed in a U-shaped cross section having a groove 6d at a central portion, and has a two-step slope 6b from the blade 6a to the bottom 6c on the outer surface thereof. The blade has a predetermined thickness.
[0014]
The screw shaft 7 is screwed into a screw hole of the base 3 of the clamp body 1, and an operating portion 7 a at the lower end of the screw shaft 7 is arranged. The rear end of the operating portion 7 a is hexagonal, It is designed to engage with a tool. A collar 10 integrally formed with the screw shaft 7 is interposed. The collar 10 has a long groove 11a parallel to the axial direction, and an outer cylinder 11 is arranged outside the collar 10 so that the screw shaft 7 can rotate freely. The key 12 is inserted into the long groove 11a, and the rotation of the clamp body 1 is prevented. An FRP 13 which is an insulating material is disposed between a connection portion between the screw shaft 7 and the operation portion 7a and the collar 10.
[0015]
The handling operation of the thus-configured penetrating type clamp of the present invention will be described.
The insulated wire 4 is arranged between the holding section 2 of the clamp body 1 and the movable guide 5 of the base 3, and when a tool is inserted into the operation section 7 a and rotated, the screw shaft 7 rotates and rises. The guide blade 5a securely grips the holding member 2 to determine the position of the core wire, raises the operating rod 8 as the screw shaft 7 rises, and moves the contact blade 6 straight to the insulated wire 4 by the terminal block 15. Let go. At this time, since the contact blade 6 does not rotate, the blade edge 6a reliably contacts the core wire.
[0016]
A tool is fitted to the rear end of the operation portion 7a of the screw shaft 7 and rotated to rotate the screw shaft 7, and the screw shaft 7 is raised to move the movable guide 5 to the holding portion 2 side and covered with the guide 5a. The electric wire 4 is gripped. The position of the core wire is securely fixed, and the terminal block 15 is moved so that the contact blade 6 penetrates the electric wire. At this time, the two contact blades make contact with the core of the electric wire.
The fin portion of the insulated wire 4 enters the U-shaped groove 6d of the contact blade 6, so that it does not become an obstacle, and the cutting edge 6a contacts the core wire. Since the contact blade 6 has the two-step inclination 6b, the contact blade 6 reliably bites into the covered electric wire 4.
[0017]
Since the contact blade 6 has two blades, the contact blade 6 is strong and has a long electrode, so there is no possibility of damage. Depending on the shape of the contact blade 6, the conductor outer shape is from 5 mm to a thick conductor size, for example, the conductor outer shape is 200 mm ² Can be used. Since the contact blade 6 is U-shaped, it has excellent durability.
[0018]
【The invention's effect】
The coated penetrating type clamp of the present invention has two contact blades, so it has high strength, and is excellent in durability because it is formed in two steps. Moreover, the contact blade can be reliably moved up and down by the relationship between the outer cylinder and the internal screw shaft by the rotation operation. Since the fin portion of the electric wire enters the U-shaped groove of the contact blade, it does not become a hindrance, and the cutting edge contacts the core wire. Since this contact blade has a two-step inclination, it surely bites into the covered electric wire.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an internal mechanism for explaining an outline of a coated through clamp according to the present invention.
FIG. 2 is a front view of the through-coated clamp of the present invention.
FIG. 3 is an enlarged perspective view of a contact blade employed in the coated penetration type clamp of the present invention.
FIG. 4 is an enlarged side view of a main part showing a state where a covered electric wire of the covered penetration type clamp of the present invention is gripped.
FIG. 5 is an enlarged front view showing a grip portion of FIG. 4;
FIG. 6 is a bottom view of an embodiment of the coated through clamp of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Clamp main body 2 Holding part 3 Base 4 Insulated wire 5 Movable guide 6 Contact blade 7 Screw shaft 8 Operating rod 9 Bolt hole 10 Collar 11 Outer cylinder 12 Key 13 Insulation material (FRP)
14 Gripping part 15 Terminal block

Claims (3)

A movable guide is provided facing the holding portion of the clamp body that holds the covered electric wire, and a contact blade is provided between the holding portions on both ends of the movable guide, and the contact blade is provided on the held covered electric wire side. In the coating penetrating type clamp in which the driving member for driving
A holding portion having a concave portion so that the surface holding the covered electric wire can fit the fin portion of the electric wire,
Forming a concave groove in the longitudinal direction, having two cutting edges parallel to the tip, and making a substantially U-shaped contact blade;
An operating rod that presses the bottom surface of the contact blade with the tip and penetrates the movable guide,
Driving this operation rod up and down, a screw shaft having an operation part at the rear end connected to the movable guide, and a grip part that houses this screw shaft,
By rotating the operating part of the screw shaft, the movable guide approaches and separates from the holding part of the clamp body, the covered wire is gripped by the holding part and the movable guide, and the operating rod is driven by the screw shaft. Characterized in that the electrode and the contact blade are driven by means of, so that the contact blade bites into the gripped covered electric wire. A holding portion having a concave portion that can insert a fin portion protruding on both sides of the insulated wire,
A movable guide that is disposed opposite to the holding portion and has guide portions for pressing the covered electric wire at both ends, and is close to and away from the holding portion,
A screw shaft connected to the movable guide and moving up and down,
Forming a concave groove in the longitudinal direction, having two cutting edges parallel to the tip, having a substantially U-shaped shape, and a contact blade coming and going between the guide portions of the movable guide;
An operating rod that presses the bottom surface of the contact blade with the tip and penetrates the movable guide,
This operating rod is driven up and down, connected to the movable guide, a screw shaft having an operating portion at a rear end, and a grip portion having the screw shaft therein,
A collar arranged on the outer periphery of the screw shaft and formed of an insulator;
A cylindrical gripping part of a clamp body having a long groove in which the collar and the screw shaft are housed, the holding part is provided at the tip, and a key laid in the collar is loosely fitted and slidably fitted;
The movable guide approaches and separates from the holding part of the clamp body by rotating the operating part of the screw shaft, and when approaching, the covered wire is gripped, and the operating rod is driven to form the electrode and the contact blade. A penetrating type clamp wherein the contact blade is driven into the insulated wire gripped, and the clamp body is prevented from rotating by the key. The coated through-type clamp according to claim 1 or 2, wherein a gentle two-step inclined surface is formed along a bottom from a cutting edge on an outer surface orthogonal to two cutting edges of the contact blade.

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