JP3954061B2 - Connection sleeve for multiphase low voltage cable - Google Patents

Description

The present invention relates to a connection sleeve for a multiphase low-voltage cable. Specifically, it is a connection sleeve used when connecting low-voltage cables having two or more phases of multi-phase wire cores (insulated wires), and in particular, a plurality of connection sleeve bodies that connect the wire cores for each phase. Insulation cores are arranged and stored, and this insulation core is housed in an insulating cover body to provide a double-layer double insulation structure, which provides excellent insulation resistance and damage resistance and enables bundles. The present invention relates to a connection sleeve for a multiphase low-voltage cable.

For example, a round vinyl insulated vinyl sheath cable (VV cable) or the like is frequently used as a low-voltage cable used for an overhead wire or indoor wiring that handles a transmission voltage of 600 volts or less.

When the low-voltage cables are connected to each other, as shown in FIG. 15, the low-pressure cable cores 11 for one phase (one line) are overlapped and compressed and connected using a C-shaped connection sleeve 20. Then, by covering with an insulating cover (not shown), one phase is added. Then, the same work is performed for the remaining number of phases, thereby connecting (adding) the multiphase low-voltage cables.

Alternatively, as shown in FIG. 16, a low-pressure cable core for one phase is compressed and connected using a butted connection sleeve 20, and then covered with an insulating cover (not shown). Perform the addition. Then, by performing the same addition work for the remaining number of phases, the multiphase low-voltage cables are added together. Alternatively, although not shown, the low pressure cables are joined together by compressing and connecting one phase at a time using a connection sleeve with an insulating cover.

FIG. 17 shows an example of adding a three-phase three-wire type or single-phase three-wire type low-voltage cable in which three wire cores 11 are bundled. As is well known, the low-voltage cable 10 is formed by bundling three wire cores 11a, 11b, and 11c with a predetermined separation distance and covering with a sheath 12 with an insulator such as polypropylene or jute interposed therebetween. . FIG. 17 illustrates a case where a round low-voltage cable 10 having a circular shape as a whole by arranging three wire cores 11a, 11b, and 11c in a Δ shape is used as an overhead wire.

The low voltage cable 10 is stretched using a messenger wire 14. Low voltage cable 10
The added portions (connection portions) of A and 10B are connected to each other using the connection sleeve 20 described above with the wire cores 11a, 11b, and 11c exposed. The connection sleeve 20 is a butted connection sleeve or a C-shaped sleeve.

Since the electrical insulation strength of the core portion La exposed from the sheath 12 needs to be handled in the same way as an insulated wire in the interpretation of the electrical equipment technical standards, is it firmly fixed so as not to contact the messenger wire 14? Or it must be mounted with a reasonable separation. Therefore, the low-voltage cables 10 and 10 are connected to each other with some slack as shown in FIG. In a normal case, sag away by 20-30 cm. Similarly,
Since the wire core portion La exposed from the sheath 12 is handled in the same manner as the insulated wire as described above,
In order to increase the insulation strength of this portion, there is a case where the cover is covered with a cover having an electrical insulation strength according to the sheath. In this case, if the connecting sleeves 20, 20, 20 are bundled in the same location, the connecting location becomes thick and an appropriate distance cannot be secured. Therefore, the length of the wire cores is staggered as shown in FIG. The required interphase insulation strength is obtained by adjusting the thickness.

Thus, conventionally, since a single-phase C-type connection sleeve or a single-phase butt-type connection sleeve is used as a connector for connecting low-voltage cables to each other, for example, when mounting on the messenger wire 14, There is a problem that the low voltage cables 10 (10A) and 10 (10B) cannot be wired in a straight line because they must be mounted with a slack of a separation distance in consideration of the insulation strength.

In addition, since the connection part between the wire cores is handled as an insulated wire, the connection sleeves 20 need to be connected in a zigzag-like state in which each of the connection sleeves 20 is open, and is not mounted on the messenger wire 14. However, it is necessary to adjust the length of the wire core so that the connecting sleeves are staggered, which makes the addition work troublesome. Since the portion of the connection sleeve 20 is exposed to the outside, it also causes a loss of aesthetics.

Therefore, the present invention solves such a conventional problem, and has a double-layer insulation structure particularly excellent in insulation resistance, and has a bundle that has an insulation strength equal to or higher than that of a cable. We propose a connection sleeve for multi-phase low-voltage cables that makes it possible.

In order to solve the above-described problem, a connection sleeve for a multi-phase low-voltage cable according to the present invention described in claim 1 is :
A plurality of connection sleeve bodies for connecting the cable cores having multiple phases for each phase;
An insulating core provided with a hole part used at the time of pressure bonding or compression on a part of the outer peripheral surface thereof while being bundled by aligning and storing the connection sleeve bodies.
It is composed of a cylindrical insulating cover body that covers the insulating core,
The outer peripheral surface of the insulating cover body facing the hole is a contact surface for pressure bonding or compression,
By pressing or compressing the connecting sleeve main body from the abutting surface, the wire cores of the same phase are connected and fixed to be bundled .

In the present invention, the connection sleeve is formed so that a plurality of wire cores can be bundled, and the shape, thickness, and material are sufficient to provide sufficient insulation resistance and damage resistance between the wires. As the multi-phase low-voltage cable, a single-phase two-wire type, a single-phase three-wire type, a three-phase three-wire type, and a three-phase four-wire type can be considered. A connection sleeve used when connecting three-phase three-wire or single-phase three-wire low-voltage cables is exemplified (see FIG. 1).

In this connection sleeve, a butt-type connection sleeve body is used as the connection sleeve body. The connection sleeve body is made of a metal material having good conductivity and capable of plastic deformation. When the polyphase low-voltage cable is a three-wire type, an insulating core into which three connection sleeve bodies are inserted is provided. The insulating core is an insulating cylindrical body having a triangular shape as a whole, and has three hollow insertion holes arranged in a Δ shape. A plurality of holes are provided on the outer peripheral surface of the insulating core. The plurality of hole portions are hole portions for pressure bonding or compression for connecting and fixing the wire cores inserted into the three connection sleeve bodies inserted in the inside. The die of the compression tool (caulking tool) is set so as to face this hole. The insulating core is housed and fixed in an insulating cover that forms a cylindrical body.

This insulating cover body is also made of an insulating material having sufficient insulation resistance, extensibility and damage resistance. The inner surface of the insulating cover body is also formed in a triangular shape according to the outer peripheral surface shape of the insulating core. It is easy to fix the caulking tool on the outer peripheral surface of the insulating cover body, and there are two contact surfaces (cut surfaces) that are flush with the flat surface of the die with respect to one line center. It is formed over 6 places. Other outer peripheral surfaces are circular. An abutting surface is further formed so as to continue to a part of these abutting surfaces. This abutting surface is a position facing the hole portion, and is formed at a position corresponding to the facing position of the convex portion of the convex die of the die.

Caps are engaged with both ends of the insulating cover body. The cap is a protective cap for preventing rainwater from entering the insulating core by contacting the surface of the cable sheath and treating the portion with an insulating tape or the like.

By using an insulating core equipped with a connecting sleeve body, three wire cores can be bundled.
The distance between the lines and the surface-cured distance are selected so that the insulation resistance between the lines is sufficient even if they are bundled, and a sufficient insulation resistance is obtained and a rigid insulating material is used.

The connection sleeve main body can ensure sufficient insulation performance by two layers of the insulating core and the insulating cover body inserted on the outer side of the connecting sleeve body. As a result, it is possible to achieve insulation performance and damage resistance that are almost the same as those of low-voltage cables. Even when low-voltage cables are used as overhead wires, this connection sleeve is not installed separately from the messenger wires, but is installed in a straight line. it can.

In this invention, while using an insulating core having sufficient insulation resistance and rigidity capable of inserting a plurality of wire cores, an insulating cover body having further sufficient insulation resistance and damage resistance is provided outside the insulation core. A two-layer double insulator structure is provided.

According to this, even in the case of a multi-phase low-voltage cable composed of a plurality of wire cores, the addition portion between the low-voltage cables can be bundled and high insulation characteristics can be obtained, so that the electric insulation strength is low-voltage cable. Therefore, the separation distance from the grounded object is unnecessary. For example, even when it is mounted on a messenger wire or the like, it can be wired in the same straight line as a low-voltage cable. Therefore, even if there are additional points (connection points), the finish is smart without any discomfort, and the aesthetics are not impaired by the addition.

Conventionally, since the connection sleeves are arranged in a staggered manner in consideration of insulation resistance, it is necessary to consider the cutting length of the low-voltage cable, but in the present invention, even if there are a plurality of wire cores, if the same cutting length is used Good. This eliminates the need to adjust the cutting length of the wire core, eliminates unnecessary waste due to the connection of the wire core, and eliminates the work of securing separation. Therefore, it is possible to greatly reduce the work time at the site especially when performing the addition work.

Since the crimping or compression operation is performed in a state where the plurality of wire cores are collectively inserted into the insulating core, there is no exposed portion of the wire core, which is extremely safe.

Since the abutting surface is formed on the insulating cover body, the die position adjustment of the crimping tool with respect to the connection sleeve can be performed easily and accurately, so that the connection sleeve body and the cable core can be reliably crimped or compressed. As a result, mistakes in crimping or compression work can be eliminated, and the work time can be shortened while ensuring the reliability of the crimping work .

Due to the bundling by the connecting sleeve, the added portion swells slightly compared to the other portion (low voltage cable). Therefore, for example, even when this additional portion is housed in the pull box, the occupied area in the pull box can be suppressed, and as a result, the enlargement of the pull box can be suppressed.

Subsequently, a preferred embodiment of the connection sleeve for a multiphase low-voltage cable according to the present invention will be described in detail with reference to the drawings.

In the present invention, a low-voltage cable having two or more wire cores (insulated wires) housed in a multiphase low-voltage cable is an object. In addition to the single-phase two-wire low-voltage cable as well known,
There are single-phase three-wire, three-phase three-wire low-voltage cables, three-phase four-wire low-voltage cables, and the like. Also,
Low-voltage cables include vinyl insulated vinyl sheathed cables (VV cables) and low-voltage cross-linked polyethylene insulated vinyl sheathed cables (CV cables). In the example described below, a three-wire type in which the cores are arranged in a Δ shape. This is a case where it is applied to a round low-voltage cable (VVR cable).

An example of a connection sleeve 100 for a three-wire multiphase low-voltage cable according to the present invention will be described with reference to FIG.

As shown in FIG. 1, this connection sleeve 100 is a 3 for connecting the wire cores for each phase.
Connecting sleeve body 20 (20A-20C, of which only 20C is shown), and these 3
An insulating core 30 that is bundled by storing the connecting sleeve bodies 20A to 20C in a Δ shape and a cylindrical insulating cover body 40 that is inserted so as to surround the insulating core 30.
It consists of. Furthermore, in this example, it is comprised by a pair of cap (protection cap) 50A, 50B with which the both ends of the insulating cover body 40 are mounted | worn.

The connection sleeve body 20 is formed into a cylindrical body using a metal conductor (copper material Cu or the like) that can be plastically deformed. In this example, a butt connection sleeve is used. The connection sleeve main body 20 has a wire core 11 housed in two low-voltage cables 10 to be connected.
While inserting the end parts of a-11c and 11a-11c into the inside and abutting the end faces of the wire cores (see FIG. 6), the wire cores 11a-11c, 11a-11c are electrically connected to each other. , Mechanically connect. The length and inner diameter vary depending on the specifications of the low-voltage cable used. In this example, the inner diameter is 7 to 8 mm, and the length is selected to be about 5 cm.

The insulating core 30 is configured as a Δ-shaped cylindrical body 31 so that the wire cores are arranged in a Δ shape and aligned. The cylindrical body 31 is selected to be slightly longer than the length of the connection sleeve main body 20 to be inserted therein, and three hollow insertion holes 32 (32a) having a Δ-shaped arrangement relation are provided therein.
~ 32c) are drilled.

Air that communicates with the three hollow insertion holes 32 at positions on the outer peripheral surface of the insulating core 30 that are back and forth with respect to the longitudinal direction of the insulating core 30 (inside the end face of the inserted wire core). Hole 34
(34a to 34c) and 36 (36a to 36c) are formed.

These holes 34 and 36 are holes for allowing the connecting sleeve body 20 to face a die of a compression tool used when the connecting sleeve body 20 is crimped (or compressed) as will be described later. Therefore, these air holes 34 and 36 have substantially the same width as the inner diameter of the hollow insertion hole 32.
It is shaped to be a window hole having a predetermined length. The length and width are arbitrary, but in this example, the size is adapted to the convex portion provided on the die as the compression tool (FIG. 9,
(See FIG. 10).

Here, the insulating core 30 is formed of a resin material (synthetic resin material) that is excellent in mechanical strength and electrical insulation performance and has very low water absorption, and is a resin material having these characteristics. In this example, fiber reinforced plastics such as FRP (Fiber Reinforced Plastics) are used.

When this fiber reinforced plastic is used as an insulating core material, the insulating property between the hollow insertion holes 32 becomes a problem. According to the experiment, it was confirmed that even when an AC voltage of 5000 volts was applied for 1 minute, flashing did not occur by setting the width (separation width) between the hollow insertion holes 32 and 32 to 3 to 4 mm. . Therefore, it was proved that the withstand voltage characteristic equivalent to that of the low-voltage cable 10 can be provided if the insulating core 30 is formed with such a width between holes.

Further description will be given with reference to FIG.
The insulating core 30 is inserted and fixed in the insulating cover body 40. This insulating cover body 40 is also a cylindrical body, and its inner hollow surface 42 a is formed as a Δ-shaped hole having the same size as the insulating core 30, and its outer peripheral surface is formed as a circular cylindrical body 42. ing.

Three contact surfaces 46 (46a to 46c), 47 are provided on the outer peripheral surface of the circular cylindrical body 42 in parallel with the outer surface of the insulating core 30 and corresponding to the pair of low-voltage cables 10A and 10B.
(47a to 47c) are formed. These contact surfaces 46 and 47 are both used as contact reference surfaces for the dies of the compression tool.

Further, abutting surface 48 (for die) is connected to a part of the lower ridge line of these contact surfaces 46, 47.
48a to 48c) and 49 (49a to 49c). The abutting surfaces 48 and 49 are both provided at positions where the convex portions of the convex dies used as a compression tool meet. Therefore, the abutting surfaces 48 and 49 are provided at positions facing the hole portions 34 and 36 of the insulating core 30, respectively.

A fixed portion 60 such as a stopper as shown in FIG. 3 is provided in a part of the thick portion 42b between the circular cylindrical body 42 and the inner hollow surface 42a. In this example, the fixing portion 60 is configured by the screws 62 and the washers 64 and provided at both ends of the insulating cover body 40. The internal insulating core 30 is prevented from coming out of the insulating cover body 40 by these washers 62 provided at the left and right ends. As a result, the insulating core 30 is fixed in the insulating cover body 40.

The insulating cover body 40 configured in this way is basically processed with a synthetic resin material, but the characteristic is that the insulating core 30 is first housed to provide double insulation in two layers. In order to cover the connection sleeve body 20 with a material, it must have excellent electrical insulation performance. Considering that it is used outdoors, it must have very low water absorption and excellent weather resistance. In addition to these, the connecting sleeve body 20 and the wire core 11
Must be compressed and processed so that they are connected and fixed, and therefore must have mechanical extensibility that can withstand the external force at that time. As the synthetic resin material satisfying such characteristics, a highly insulating and highly extensible thermoplastic such as PBT (polybutylene terephthalate) is preferable.

The length of the insulating cover body 40 is selected to be slightly longer than that of the insulating core 30 in order to insert caps 50A and 50B described later. The slightly long cylindrical portion 44 is a cylindrical body, and the tip portions 52a and 52b of the caps 50A and 50B are inserted into and engaged with the cylindrical portion 44 (42
50A, 42 and 50B) are combined (see FIG. 2). The main body portions 54a and 54b of the caps 50A and 50B are thinned so as to be slightly inclined toward the outer front end portion (see FIG. 4). As shown in FIG. 6, the caps 50A and 50B
This is to prevent a gap from being generated even when the connecting sleeve 100 and the low-voltage cable 10 are taped and fixed with an insulating tape or the like over a predetermined range by reducing the level difference between the cable and the low-voltage cable 10 as much as possible. .

Now, in FIG. 1, when assembled by inserting the connecting sleeve constituent members shown disassembled into the corresponding portions, they are as shown in FIG. 2. A side view after assembly is shown in FIG.
The figure is a view when the caps 50A and 50B are removed. Three connecting sleeve bodies 2
0A to 20C are inserted and fixed in the insulating core 30 while being arranged in a Δ shape. Insulating core 30
And the insulating cover body 40 are inserted in close contact with each other.

FIG. 4 is a cross-sectional view including the assembled hollow insertion holes 32a and 32b. Constricted portions 21 and 21 are provided at the center portions of the connection sleeve main bodies 20A and 20B so that the end faces of the wire cores abut each other. Therefore, the end surface of the wire core 11 is inserted until it comes into contact with the constricted portion 21.

As shown in FIG. 4, a predetermined insulating characteristic is obtained by the line interval wall portion 38 of the insulating core 30. Further, a longitudinal section with respect to the hole 34 is as shown in FIG. 5, and the connection sleeve bodies 20A, 20B, 20C are exposed to the outside (the inner surface side of the insulating cover body 40) by the holes 34a to 34c. I understand that. The shape of the holes 34 and 36 is arbitrary. In this example, the connection sleeve main bodies 20A to 20C are selected to have a vacant space of approximately 180 degrees.

The size of the inner space is selected so that the inner surface 42a of the insulating cover body 40 is in close contact with the outer peripheral surface of the insulating core 30, so that there is as little play (margin) of the insulating core 30 as possible.

FIG. 6 shows a fracture surface similar to that of FIG. 4 in a state where the wire cores 11 of the low-voltage cable 10 are inserted into the connection sleeve 100. Thus, the inner diameter of the connection sleeve body 20 is selected to be substantially the same as the outer diameter of the wire core 11. The inner diameter of the insulating core 30 is selected to be substantially the same as or slightly larger than the outer diameter (wire core outer diameter) of the insulators 13a and 13b of the wire core 11.

The inner diameters of the caps 50A and 50B are selected to be slightly larger than the outer diameter of the low-voltage cables 10A and 10B including the sheath 12, but this is the low-voltage cables 10A and 10B.
This is to facilitate the insertion of the cap into B. By using this connection sleeve 100, even the low-voltage cable 10 containing a plurality of wire cores can be bundled.

The connection fixing process of the low-voltage cable is performed in the state of FIG. 6 or the state of FIG. 6 with only the caps 50A and 50B removed. Specifically, it is caulking processing (compression bonding (or compression) processing) using a compression tool. The state after the crimping process is shown in FIG. FIG. 8 shows a longitudinal sectional view after the caulking process. Recessed parts A1, A2, B1, and B2 (in reality, six places) appear by caulking.

FIG. 7 shows an example in which the caps 50A and 50B are inserted and compressed. When the compression process is performed from the outside of the insulating cover body 40, the connecting sleeve bodies 20A and 20B are compressed and crimped, and the insulating cover body 40 is compressed. Is also plastically deformed as shown in the figure. By this compression process, the wire core 1
While the ones are firmly connected and fixed, the insulating cover body 40 is also connected and fixed to the insulating core 30. 8 is a CC ′ sectional view of FIG. 7, and FIG. 7 is a DD ′ sectional view of FIG.

9 and 10 show an example of the compression tool 70. FIG. As shown in FIG.
Has a horseshoe-shaped tool main body 72, and a concave die 74A and a convex die 74B are arranged opposite to each other on the mounting portion 72a, and the connection sleeve 100 main body is mounted therebetween. At this time, one side of the concave die 74A abuts against the abutting surface 46c, and the convex portion 76 of the convex die 74B abuts against the abutting surface 48a associated with the connection sleeve body 20B. If it does so, the hole 34b will also oppose the convex part 76. FIG.

In this state, if an operating rod (not shown) provided in the tool main body 72 is moved from the arrow a side and the concave die 74A side is pressed, the pressing force to the convex portion 76 is applied to the abutting surface 48a and the hole portion. 34
It acts on the connection sleeve main body 20B itself via b. The connection sleeve body 20B is crimped (or compressed) by this pressing force, and the crimping process is performed by plastic deformation of the crimped portion.

The compression tool 70 shown in FIGS. 9 and 10 is an example in which the connection sleeve bodies 20A to 20C are caulked one by one. It is also possible to caulk the three connecting sleeve bodies simultaneously. In that case, the cross-sectional structure of the insulating core 30 is slightly different from the cross-sectional structure in the case of FIG.

In this case, as shown in FIG. 11, the cross-sectional structure is such that the center of pressure is directed to the center of the line interval wall 38 , in other words, to the axial center of the insulating core 30 . By doing so, it is possible to apply crimping force to each of the three connection sleeve bodies 20A, 20B, and 20C at the same time, and simultaneously perform caulking processing. In order to achieve simultaneous compression, in this example, the shape of the air holes 34a to 34c of the insulating core 30 is changed to make the same simple gap structure, and the abutting surfaces 48a to 48c are formed so as to straddle the crimping direction. ing.

When the caulking process is performed one by one, the cross-sectional structure of the insulating core 30 may be the case shown in FIG. 10 or the cross-sectional structure shown in FIG. However, in the case where three are simultaneously compressed, FIG.
Preferably, the cross-sectional structure is 1.

By performing the compression process as described above, the low-voltage cable 10A in a bundled state,
10B will be added together. After the compression process, the taping process including the caps 50A and 50B is performed and the waterproof process is performed.

As described above, since the connection sleeve body 20 is covered with the double insulators 30 and 40 in two layers, the electrical insulation characteristic equivalent to that of the low voltage cable can be obtained. Even when the cable is used as an overhead wire, it can be installed in a straight line with respect to the messenger wire 14 without sagging the portion of the connection sleeve 100 as shown in FIG. Because it is bundled, the beauty is not impaired. In FIG. 12, the hatched portions are taping portions 69A and 69B.

In the above-described embodiment, a connection sleeve used when connecting three-wire multiphase low-voltage cables is illustrated.
FIG. 13 shows a connection sleeve 100 used when two-wire multiphase low-voltage cables are joined together.
It is an example. In this case, the cross-sectional structure is the same as that of a flat low-voltage cable, and a flat insulating core 30 is used. Two hollow insertion holes 32a and 32b are provided on the right and left inside, and the connection sleeve bodies 20A and 20B are inserted therein. The line spacing wall portion 38 formed in the insulating core 30 has a cross-sectional I shape. Holes 34 (34a, 34b) used during compression processing are formed on the left and right sides of the outer peripheral surface of the insulating core 30.

The insulating cover body 40 also has an inner surface 42a that matches the outer shape of the insulating core 30, and the entire shape thereof is configured as a circular cylindrical body. Since other configurations are the same as those of the above-described embodiment, description thereof will be omitted.

Even in such a configuration, a plurality of wire cores 11 can be bundled, and sufficient electrical insulation resistance can be obtained, so that the messenger wire 14 can be wired without slack. Further, when the wire core 11 is inserted and crimped, the crimping is performed from the left and right, so that the two wire cores and the connection sleeve bodies 20A and 20B can be crimped simultaneously. Thereby, the completion work (connection work) of the low-voltage cable 10 can be shortened.

FIG. 14 shows a connection sleeve 10 used when connecting four-wire multiphase low-voltage cables.
An example of zero. In this case, the cross-sectional structure is such that four wire cores are arranged at the vertices of a regular square, and therefore, the insulating core 30 having a substantially rectangular longitudinal section is used. Hollow insertion holes 32a to 32d are provided in the left and right and up and down inside, and there are connecting sleeve bodies 20A to 20D.
20D is inserted. The line interval wall portion 38 formed in the insulating core 30 has a substantially cross-shaped cross section. Hole portions 34 (34 a to 34 d) used during the compression process are formed on the peripheral surface portion located on the diagonal line of the outer peripheral surface of the insulating core 30.

The insulating cover body 40 is also formed as a rectangular inner surface 42a that matches the outer shape of the insulating core 30, and the overall shape thereof is configured as a circular cylindrical body. Since other configurations are the same as those of the above-described embodiment, description thereof will be omitted.

Even in such a configuration, a bundle of the wire cores 11 can be obtained and sufficient electrical insulation resistance can be obtained, so that the messenger wire 14 can be wired without slack. Also, when inserting and crimping the core, it will be crimped from the diagonal line,
The four wire cores and the respective connection sleeve main bodies 20 can be crimped simultaneously. As a result, it is possible to shorten the work for constructing the low-voltage cable as described above.

In this invention, it is a power distribution system used for outdoor wiring and indoor wiring, and can be used as a connection sleeve for a low voltage cable having a multiphase structure.

It is a disassembled perspective view which shows an example of the connection sleeve which concerns on this invention. It is a perspective view which shows the state which assembled FIG. It is the side view. FIG. 3 is a cross-sectional view of FIG. 2. FIG. 3 is a longitudinal sectional view on the line A-A ′ of FIG. 2. FIG. 5 is a cross-sectional view similar to FIG. 4 with a low-voltage cable inserted. FIG. 5 is a cross-sectional view similar to FIG. 4 in a state where the crimping operation is performed. FIG. 6 is a cross-sectional view similar to FIG. 5 in a state where caulking work is performed. It is a top view which shows an example of the crimping operation | work using a crimping tool. It is a side view showing an example of caulking work using a caulking tool. It is principal part sectional drawing which shows the other example of an insulating core. It is a figure which shows the state which mounted the low voltage | pressure cable using this invention on the messenger wire. It is sectional drawing which shows the example of the 2-wire type low voltage cable applicable to this invention. It is sectional drawing which shows the example of the 4-wire type low voltage cable applicable to this invention. It is a perspective view of the principal part which shows the example of a low voltage | pressure cable connection using the conventional connection sleeve (C-shaped connection sleeve). It is a perspective view of the principal part which shows the example of a low voltage | pressure cable connection using the conventional connection sleeve (butt | matching type connection sleeve). It is a figure which shows the example of mounting | wearing at the time of applying the conventional connection cable to a 3-wire type low voltage | pressure cable.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Connection sleeve, 20 ... Connection sleeve main body, 30 ... Insulation core 32a-32c ... Hollow insertion hole, 34a-34c ... Hole part, 36a-36c ...
Hole part, 40 ... Insulating cover body, 42 ... Cylindrical body, 42a ... Inner surface, 44 ...
Cylinder part, 46a-46c ... contact surface, 47a-47c ... contact surface, 48a-48c ...
・ Abutting surface, 49a-49c ... Abutting surface, 50A, 50B ... Cap, 10 ... Low-voltage cable, 11a-11c ... Wire core, 12 ... Sheath

Claims (4)

A plurality of connection sleeve bodies for connecting the cable cores having multiple phases for each phase;
An insulating core provided with a hole part used at the time of pressure bonding or compression on a part of the outer peripheral surface thereof while being bundled by aligning and storing the connection sleeve bodies.
It is composed of a cylindrical insulating cover body that covers the insulating core,
The outer peripheral surface of the insulating cover body facing the hole is a contact surface for pressure bonding or compression,
A connection sleeve for a multi-phase low-voltage cable, wherein the connection sleeve main body is pressure-bonded or compressed from the abutting surface so that the wire cores of the same phase are connected and fixed to form a bundle. 2. The connection sleeve for a multi-phase low-voltage cable according to claim 1, wherein a butt sleeve is used as the connection sleeve body. The insulating core is a cross-sectional alignment features match the number of phases of a bundle of, and that made the interphase insulating capable shape
Connecting sleeve for multiphase low voltage cable of claim 1, wherein the this. The abutting surface provided on the insulating cover body when simultaneously pressing or compressing the plurality of connection sleeve bodies faces the axis of the insulating core.
The connection sleeve for a multi-phase low-voltage cable according to claim 1.

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