JP3926630B2 - Insulation coated core wire connection method for metallic cables for communication, core wire crimping parts, split sleeve and core wire connection jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention relates to a method of connecting an insulation coated core wire of a communication metallic cable capable of electrically conducting the insulation coated core wire of a communication metallic cable without removing the insulation coating, and to use this insulation coated core wire connection method. The present invention relates to a core wire crimping part, a split sleeve, and a core wire connecting jig.
[0002]
[Prior art]
As a conventional method of connecting the insulation coated core wire of a communication metallic cable, the core portion of the insulation coating core wire is dropped into a metal U-shaped slit portion, the insulation coating is destroyed, and the conductor portion of the core wire is a U-shaped slit. There is a method of obtaining electrical continuity by contacting with a metal part of the substrate. In this method, since electrical connection with the core wire is performed at the contact point in the U-shaped slit portion, as a means for reducing the contact resistance between the core wire conductor and the U-shaped slit, the U-shaped slit and the core wire A method of increasing the contact area or using a plurality of U-shaped slits is employed.
[0003]
[Problems to be solved by the invention]
The U-shaped slit used in the above prior art has a structure that deforms when a core wire is inserted and holds and fixes the core wire by its restoring force, and a plurality of core wires are fixed in the same U-shaped slit. However, since the connection between the core wires is performed by the electrical connection between the U-shaped slits, it is difficult to reduce the size of the U-shaped slit itself, and furthermore, to ensure electrical insulation after connection. The metal part of the U-shaped slit needs to be covered with an insulating housing, which makes it difficult to reduce the size of the entire connection part.
[0004]
The present invention has been made in view of such circumstances, and in connecting the insulation coated core wire of the communication metallic cable, the contact resistance of the connection portion is low, the construction is simple, and the connection portion after construction is small. To provide a method for connecting an insulation coated core wire of a metallic cable for communication, a core wire crimping part, a split sleeve, and a core wire connection jig used for carrying out this insulation coating core wire connection method And
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, there is provided a method for connecting an insulating coated core wire of a communication metallic cable, wherein the insulating coating of the communication metallic cable is not removed in the split sleeve having a split portion. The two insulation coated core wires are inserted, provided on the side to be crimped to the two insulation coated core wires, and the length of the insulation coated core wire across the two insulation coated core wires inserted. A core wire crimping part having a conductive member extending in the direction and a plurality of needle-like protrusions formed on the conductive member and made of a conductive material is inserted into the split sleeve by the core wire connecting jig from the split portion. The plurality of needle-like projections pierce the insulation coating of the two insulation coating core wires and press fit until reaching the conductor portion of the insulation coating core wire to obtain electrical conduction. And
[0006]
According to a second aspect of the present invention, in the method for connecting a core wire of a metallic cable for communication, an existing insulation coated core wire that is not cut is inserted into the split sleeve having a split portion from the split portion, and After inserting the insert insulation coated core wire into the split sleeve, it is provided on the side to be crimped to the existing insulation cover core wire and the insert insulation cover core wire, and the two insulation cover core wires are inserted over the two inserted insulation cover core wires. A core wire crimping part having a conductive member extending in the length direction of the insulation coated core wire and a plurality of needle-like protrusions formed on the conductive member and made of a conductive material is split by the core wire connecting jig. The sleeve is dropped from the split portion, and the plurality of needle-like protrusions pierce the insulation coating of the existing insulation coated core wire and the interrupting insulation coating core wire, and the existing insulation coated core wire and the interrupting insulation coating core wire Conductor part In press-fitted to reach, characterized in that as an electrical conduction is obtained.
[0007]
The invention according to claim 3 is the method for connecting the insulated coated core wire of the metallic cable for communication according to claim 1 or 2, wherein the split sleeve is filled with insulating grease in advance. In this state, the insulation coated core wire is connected.
[0008]
According to a fourth aspect of the present invention, there is provided a cord crimping part for use in carrying out the method of connecting an insulation coated cord of a communication metallic cable according to any one of the first to third aspects, The wire crimping component is characterized in that a base portion is formed of an insulating plastic, and a distal end portion located on the side to be crimped to the insulation coated core wire is formed of a conductive material having a plurality of needle-like projections.
[0009]
The invention according to claim 5 is a split sleeve used when the insulation coated core wire connecting method for a metallic cable for communication according to any one of claims 1 to 3 is carried out. A split portion is provided in the axial direction, and an end portion of the split portion forms a positioning stopper for positioning and fixing when the core wire crimping component according to claim 4 is mounted.
[0010]
According to a sixth aspect of the present invention, in the split sleeve according to the fifth aspect, a number of convex patterns are projected on the inner bottom portion of the split sleeve, and positioning protrusions are provided on the outer bottom portion. It is formed.
[0011]
The invention according to claim 7 is the split sleeve according to claim 5 or 6, wherein the split sleeve is formed of an insulating material, or the outer peripheral surface is covered with an insulating material. It is characterized by.
[0012]
The invention according to claim 8 is a jig for connecting a core wire used when carrying out the method of connecting an insulating sheathed core wire of a metallic cable for communication according to any one of claims 1 to 3, The core wire connecting jig is for pushing the core wire crimping part according to claim 4 into the split sleeve according to any one of claims 5 to 7, and a receiving portion for positioning the split sleeve; It consists of a pushing part which has a convex part for pushing in a certain amount of said core wire crimping parts.
[0013]
According to a ninth aspect of the present invention, in the cord connecting jig according to the eighth aspect, a positioning projection provided on the split sleeve 1 engages with an inner bottom portion of the receiving portion. A groove for positioning the split sleeve is formed.
[0014]
The invention according to claim 10 is the cord connection jig according to claim 8 or 9, wherein the height D from the bottom of the concave portion to the upper surface of the receiving portion in the receiving portion is , Longer than half of the height B of the split sleeve 1, the axial length F is longer than the length C of the split sleeve, and the maximum width E of the recess of the receiving portion is equal to the width A of the split sleeve. The split sleeve is set to the receiving portion, and is longer than a length obtained by adding a deformation amount by which the split sleeve deforms laterally when the core wire crimping component is pushed into the split sleeve by the pushing portion. It is characterized by.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<First Embodiment>
A method for connecting an insulation coated core wire of a communication metallic cable according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the external configuration of the split sleeve 1 and the core wire crimping part 2 used for carrying out the insulation coated core wire connection method for the metallic cable for communication according to the first embodiment of the present invention.
[0016]
In FIG. 1, the split sleeve 1 has a split portion in the axial direction, and the end of the split portion forms positioning stoppers 1a and 1b for positioning and fixing when the core wire crimping component 2 is mounted. ing. In addition, a large number of convex patterns 1c are projected from the inner bottom of the split sleeve 1, and positioning protrusions 1d are formed on the outer bottom. The convex-shaped pattern 1c is formed so that, in a state where the core wire crimping part 2 is pushed into the split sleeve 1, the insulation-coated core wire is deformed along the convex-shaped portion to increase the fixing force of the insulation-coated core wire. Works.
[0017]
In the present embodiment, the split sleeve 1 is entirely formed of an insulating material, but only the outer peripheral surface may be covered with the insulating material. By configuring in this way, even if it comes into contact with other split sleeves after assembling, no crossing occurs.
The core wire crimping part 2 has a base portion 2b made of an insulating plastic, and a tip portion 2a located on the side to be crimped to the insulation coated core wire is made of a conductive material and has a plurality of needle-like projections 2c. is doing. This needle-like protrusion 2c is also formed of a conductive material. The core wire crimping part 2 is positioned and fixed by positioning stoppers 1a and 1b of the split sleeve 1 when it is pushed into the split sleeve 1.
[0018]
Next, the core wire for inserting the core crimping component 2 into the split sleeve 1 used for carrying out the method of connecting the insulation coated core wire of the metallic cable for communication according to the first embodiment of the present invention An external configuration of the connecting jig 3 is shown in FIG. In the figure, a core wire connecting jig 3 is an instrument used to push the core wire crimping part 2 into the split sleeve 1. The receiving part 3 a for positioning the split sleeve 1 and the core wire crimping part 2 are connected to each other. It consists of the pushing part 3b which has the convex part 3c for pushing in a fixed amount.
[0019]
On the inner bottom portion of the receiving portion 3a, a positioning groove 3d of the split sleeve 1 with which a positioning projection 1d provided on the split sleeve 1 engages is formed.
The height D from the bottom of the recess in the receiving portion 3a to the upper surface of the receiving portion 3a is longer than half of the height B of the split sleeve 1, and the axial length F is longer than the length C of the split sleeve 1. When the split sleeve 1 is set to the receiving portion 3a of the core wire connecting jig 3, the core wire crimping component 2 is pushed into the split sleeve 1 by the pushing portion 3b of the core wire connecting jig 3 without being easily removed. In order to secure a deformation amount in which the split sleeve 1 is deformed laterally, the maximum width E of the recess of the receiving portion 3a is a length obtained by adding the width A of the split sleeve 1 and the deformation amount in which the split sleeve 1 is deformed laterally. It is set larger than this.
[0020]
Next, the procedure of the method of connecting the insulation coated core wire of the communication metallic cable according to the first embodiment of the present invention will be described with reference to FIGS. In the method of connecting the insulation coated core wires of the communication metallic cable according to the first embodiment of the present invention, the two insulated insulations in which the insulation coating of the communication metallic cable is not removed in the split sleeve having the split portion. Insert the sheathed core wire, and insert the core wire crimping part having a plurality of needle-like projections on the side to be crimped to the two insulation sheathed core wires into the split sleeve by the core wire connecting jig from the split portion The plurality of needle-like projections pierce the insulation coating of the two insulation coating core wires and press fit until reaching the conductor portion of the insulation coating core wire to obtain electrical conduction. It is said.
[0021]
FIG. 3A shows the configuration of the connecting portion of the insulation coated core wire in the present embodiment. The core wire crimping component 2 is positioned and fixed to the split portion of the split sleeve by the positioning stoppers 1a and 1b of the split sleeve 1. The state before mounting | wearing and the insulation coating core wire is inserted is shown. The split sleeve 1 is filled with grease 5 having insulating properties in advance. This is to provide insulation to the connecting portion after connection of the insulation coated core wire.
Next, as shown in FIG. 5 in the state shown in FIG. 3A, the positioning projection 1d of the split sleeve 1 is engaged with the positioning groove 3d in the receiving portion 3a of the core wire connecting jig 3, The two insulation coated core wires 4a and 4b cut in the state are inserted into the split sleeve 1 (the core wire connecting jig 3 is not shown) (FIG. 3B).
[0022]
Here, as described above, the width E of the recess of the receiving portion 3a is wider than the width A of the split sleeve in consideration of the amount of deformation when the core wire crimping component 2 is pushed into the split sleeve 1. .
Next, the core wire crimping part 2 is pushed into the split sleeve by the core wire connecting jig 3. That is, the insertion of the core crimping part 2 is completed by pushing the split sleeve 1 positioned in the receiving part 3a by a predetermined amount G by the projection 3c of the pushing part 3b (see FIG. 3). c)).
[0023]
FIG. 3C shows an insulation coated core wire 4 a in which the core wire crimping part 2 is pushed into the split sleeve 1 by the pushing portion 3 b of the core wire connecting jig 3 and is inserted into the split sleeve 1 by the core wire crimping part 2. , 4b while crushing, the needle-like protrusion 2c of the tip 2a of the cord crimping part 2 breaks through the insulation coating of the insulation coating core wires 4a, 4b and reaches the conductor portion of the insulation coating core wires 4a, 4b. The state where the electrical connection between the insulation coated core wire 4a to the distal end portion 2a of the core crimping component 2 to the insulation coated core wire 4b is obtained is shown.
[0024]
In addition, in the state shown in FIG. 3C, the core wire crimping component 2 is slightly slid in the axial direction of the core wire to cause destruction of the core wire covering, and the needle-like protrusion 2c at the tip of the core wire crimping component 2 It is possible to more reliably make contact with the conductive wire portions of the insulation coated core wires 4a and 4b.
[0025]
4 (a) and 4 (b) show the electrical continuity of the insulated core and the fixed state of the core in the connecting process of the insulated core shown in FIGS. 3 (b) and 3 (c). In FIG. 4, the insulation coated core wire 4 (4 a, 4 b) is pressed by the core wire crimping component 2 inside the split sleeve 1 and deformed along the convex pattern 1 c provided inside the split sleeve 1, The needle-like protrusion 2c of the core wire crimping part 2 breaks through the insulation coating and contacts the conductor portion of the insulation core wire 4 at many points, thereby reducing the contact resistance between the core wire conductor and the core wire crimping part 2. ing.
[0026]
As an example of the shape of the split sleeve, the split sleeve 1 has an elliptical shape (A> B), and the core wire crimping component 2 is pushed into the split sleeve 1 by the core wire connecting jig 3 so as to cover the insulation coated core wire 4. In a state where the core wire is pressed, the restoring force when the core wire sheath is deformed is suppressed, and the core wire fixing force acts, so that the core wire fixing force can be reliably ensured.
[0027]
Second Embodiment
Next, a method for connecting an insulation coated core wire of a communication metallic cable according to a second embodiment of the present invention will be described. In 1st Embodiment, although shown about the case where each insulation coating core wire cut | disconnected is shown, in the 2nd Embodiment, the interruption example to the existing insulation core wire 4c which is not cut | disconnected is demonstrated. . FIG. 6 shows the procedure of the method for connecting the insulation coated core wires of the communication metallic cable according to the second embodiment of the present invention.
[0028]
In the method for connecting a core wire of a metallic cable for communication according to a second embodiment of the present invention, an existing insulation coated core wire that is not cut is inserted into a split sleeve having a split portion from the split portion, and is inserted. After inserting the insulation coated core wire into the split sleeve, a core wire crimping part having a plurality of needle-like protrusions on the side to be crimped to the existing insulation coated core wire and the interrupted insulation coated core wire A jig is used to drop into the split sleeve 1 from the split portion, and the plurality of needle-like protrusions pierce the existing insulation coating core wire and the insulation coating of the interrupting insulation coating core wire, It is characterized in that electrical conduction is obtained by press-fitting until reaching the conducting wire portion of the inner insulation coated core wire.
[0029]
FIG. 6A shows a state where the core crimping component 2 is not attached to the split sleeve 1. The split sleeve 1 is filled with insulating grease 5. In this state, as shown in FIG. 6 (b), the existing insulation core wire 4c that has not been cut is inserted into the split sleeve 1 from the split portion, and the core wire crimping part 2 as shown in FIG. 6 (c). Wear.
Next, the interrupting core wire 4 d is inserted into the split sleeve 1. After that, it is possible to connect the insulation coated core wires in the same procedure as in the first embodiment.
[0030]
By this method, it is possible to branch the interrupting core wire 4d without cutting the existing insulating core wire 4c. Even when a part of the existing insulating core wire 4c is replaced, as shown in FIG. An interrupting core 4d is inserted into a replacement portion of the existing insulating core 4c, and both ends thereof are connected by applying the insulating core connecting method according to the present invention as shown in FIG. As shown in f), it is possible to replace a part of the existing insulation coated core wire by cutting and cutting the core wire of the replacement portion.
[0031]
Cleavage of edge cutting has been insulated covered conductor 4c, in order to perform Oite the portion insulative grease 5 filled in the interior of the split sleeve 1 extends off by pushing the wire crimp part 2, insulation covered conductor The insulation of the cut surface of 4c is ensured. In the first embodiment and the second embodiment, one connection mode has been described, but a plurality of split sleeves can be installed on the core wire connecting jig 3 to enable a plurality of batch connections. In addition, it is apparent that the workability is further improved by using the jig 3 having a mechanism capable of automatically supplying the split sleeve 1 and the core wire crimping part 2 to the jig 3.
[0032]
【The invention's effect】
As described above, according to the present invention, electrical continuity can be reliably realized without removing the insulation coating of the insulation coating core wire to connect the insulation coating core wire of the communication metallic cable. Can be obtained in a stable state.
In addition, it is possible to interrupt an existing insulated core wire used for work without cutting the core wire, and the influence on the current wire can be suppressed to a minimum.
[0033]
Further, according to the present invention, the size of the connecting portion of one core wire is a cylinder of about 10 to 20 mm in the axial direction of the core wire with an outer diameter of about 4 to 5 times the outer diameter of the insulation coated core wire to be connected. It is possible to achieve downsizing. Therefore, the construction can be performed with a small occupied volume even in the entire cable when a large number of core wires are connected.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the external configuration of a split sleeve and a core wire crimping part used for carrying out a method of connecting an insulation coated core wire of a communication metallic cable according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing an external configuration of a cord connecting jig used for carrying out a method of connecting an insulating coated cord of a communication metallic cable according to the first embodiment of the present invention.
FIG. 3 is an explanatory diagram showing a procedure of a method for connecting an insulating coated core wire of a communication metallic cable according to the first embodiment of the present invention.
FIG. 4 is an explanatory diagram showing an electrically conductive state and a fixed core state of an insulating coated core wire by the insulating coated core wire connecting method for a communication metallic cable according to the first embodiment of the present invention.
FIG. 5 is an explanatory view showing a state in which the core wire crimping part is pushed into the split sleeve by the insulation coated core wire connection method of the communication metallic cable according to the first embodiment of the present invention.
FIG. 6 is an explanatory diagram illustrating a procedure of a method for connecting an insulation coated core wire of a communication metallic cable according to the first embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Split sleeve 1a, 1b ... Positioning stopper 1c ... Convex-shaped pattern 1d ... Positioning projection part 2 ... Core wire crimping part 2a ... Tip part 2b ... Base part 2c ... Needle-like projection part 3 ... Core wire connecting jig 3a ... receiving part 3b ... push-in part

Claims (10)

In the method of connecting the insulation coated core wire of the metallic cable for communication,
Inserted into the split sleeve having the split portion are the two cut insulation coated core wires from which the insulation coating of the communication metallic cable has not been removed, and are provided on the side to be crimped to the two insulation coated core wires. A conductive member extending in the length direction of the insulation coated core wire over the inserted two insulation coated core wires, and a plurality of needle-like protrusions formed on the conductive member and made of a conductive material. A core wire crimping part is dropped from the split portion into the split sleeve by a core wire connecting jig, and the plurality of needle-like protrusions pierce the insulation coating of the two insulation coating core wires, and the insulation coating core wire A method of connecting an insulation coated core wire of a metallic cable for communication, wherein electrical conduction is obtained by press-fitting until reaching the lead wire portion. In the method of connecting the core wire of the metallic cable for communication,
After inserting the existing insulation coated core wire that has not been cut into the split sleeve having the split portion from the split portion, and inserting the interrupt insulation coating core wire into the split sleeve, the existing insulation coated core wire and A conductive member provided on the side to be crimped to the interrupted insulation core, and extending in the length direction of the insulation coating core over the inserted two insulation coating cores ; and formed on the conductive member A cord crimping part having a plurality of needle-like projections made of a conductive material is dropped from the split portion into the split sleeve by a cord-connecting jig, and the plurality of needle-like projections are formed on the existing insulating coated core. The insulation coating of the wire and the interrupting insulation core is pierced and press-fitted until reaching the conductive wire portion of the existing insulation coating core and the interrupting insulation core, so that electrical conduction can be obtained. Meta for communication Insulation covered conductor connection method Kkukeburu.   The insulation coating of the metallic cable for communication according to claim 1 or 2, wherein the insulation sheath core wire is connected in a state where an insulating grease is filled in the split sleeve in advance. Core wire connection method. A cord crimping part for use in performing the insulation coated cord connecting method for a metallic cable for communication according to any one of claims 1 to 3,
The core wire crimping part is characterized in that a base portion is formed of an insulating plastic, and a tip portion located on a side to be crimped to the insulation coated core wire is formed of a conductive material having a plurality of needle-like protrusions. Core wire crimping parts. A split sleeve used for carrying out the method of connecting an insulation coated core wire of a communication metallic cable according to any one of claims 1 to 3,
The split sleeve has a split portion in the axial direction, and an end portion of the split portion forms a positioning stopper for positioning and fixing when the core wire crimping component according to claim 4 is mounted. Features a split sleeve.   6. The split sleeve according to claim 5, wherein a number of convex patterns are projected on the inner bottom portion of the split sleeve, and a positioning projection is formed on the outer bottom portion.   The split sleeve according to any one of claims 5 and 6, wherein the split sleeve is formed of an insulating material, or an outer peripheral surface thereof is covered with an insulating material. A cord-connecting jig used when carrying out the method of connecting an insulation-coated cord of a communication metallic cable according to any one of claims 1 to 3,
The cord connecting jig is for pushing the cord crimping part according to claim 4 into the split sleeve according to any one of claims 5 to 7,
A jig for connecting a core wire, comprising: a receiving portion in which a concave portion for positioning the split sleeve is formed; and a pushing portion having a convex portion for pushing the core wire crimping part into a certain amount.   9. The core wire according to claim 8, wherein a positioning groove for the split sleeve is formed at a bottom portion of the concave portion of the receiving portion to engage with a positioning protrusion provided on the split sleeve. Connection jig.   The height D from the bottom of the concave portion to the upper surface of the receiving portion in the receiving portion is longer than half of the height B of the split sleeve, and the axial length F is longer than the length C of the split sleeve. The maximum width E of the concave portion of the receiving portion is set so that the width A of the split sleeve and the split sleeve are set in the receiving portion, and the cord crimping component is pushed into the split sleeve by the pushing portion. 10. The jig for connecting a core wire according to claim 8, wherein the split sleeve is made longer than a length obtained by adding a deformation amount to deform laterally.

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