JPH0417010B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to improvements in hollow circular stranded conductor connections.

(Prior Art) Conventionally, a connecting portion of a small-sized hollow circular stranded wire conductor has been constructed as shown in the vertical cross-sectional view of FIG. To explain this, Figure 1 shows the symmetrical half of the centerline vertical cross-section of the connecting part of a hollow circular stranded wire conductor with respect to the centerline, and in the figure, 3 _A and 3 _B are intended to be connected to each other. It is a hollow circular stranded wire conductor, and 3 _C is a spiral tube fitted into a hollow part with a circular cross section formed in the center of the conductor. 1 is conductor 3 _A
3B is an integral cylindrical steel core that is fitted into a hollow part to connect conductors 3A _and 3B, and a flange that brings the respective end surfaces of conductors 3A and _3B into contact with the outer periphery of the central part in the longitudinal direction of the steel core 1. A portion 1' is formed, and the end surfaces of the conductors 3 _A and 3 _B to be connected are brought into contact with both sides of the flange portion 1', respectively, and the conductors 3 _A and 3 _B are respectively inserted and inserted into the outer peripheral surface of the steel core 1. , conductors 3 _A and 3 _B corresponding to steel core 1
A compression sleeve 2 is placed around the outer periphery of the conductors _3A and _3B .
The conductors 3 _A and 3 _B are compressed into the compression sleeve 2.
and conductors 3 _A and 3 _B by crimping and fixing them to steel core 1 and
It formed a connection with. In this case, the method shown in Figure 2 was adopted. In FIG. 2, the same parts as in FIG. 1 are designated by the same reference numerals, and FIG. 2 is a side view for explaining the formation of a connecting portion of a hollow circular stranded wire conductor. To explain this, an integral cylindrical steel core 1 is inserted into the center hollow part of one conductor _3A so that one surface of its collar 1' is in contact with the end surface of the conductor _3A , and a compression sleeve is 2 on conductor 3 _A ,
The cable is bent and lifted onto the central hollow part and outer periphery of the conductor 3 _B to which the protruding end from the conductor 3 _A of the steel core 1 and the other end of the compression sleeve 2 are to be connected, and then the cable is inserted. By pressing down at the same time, the entire length of the protruding part from conductor 3 _A of steel core 1 is inserted into the central hollow part of conductor 3 _B , and compressed to the outer periphery spanning conductors 3 _A and 3 _B corresponding to the inserted part of steel core 1. The sleeve is inserted and compressed, and the conductor 3 is inserted into the compression sleeve and the steel core 1 inserted into the conductor 3 _A 3 _B.
The connection portion between the conductors 3 _A and 3 _B was constructed by crimping and fixing _A 3 _B.

(Problems with the prior art) However, in the above case, if the cable size is large, it may be difficult to lift the cable or push it down. Generally undesirable. Therefore _, as shown in FIG. ₃ , the steel core 1 in FIG.
Divide into two at the center in the length direction to obtain 4 _A ,
4 _B , and flanges 4 _{A ′} , 4 _B ′ are formed at one end of each steel core 4 _A 4 _B , and the steel cores 4 _A , 4 _B are formed into flanges 4 _A ′, 4 _B ′, respectively. The hollow circular stranded wire conductors 3 _A and 3 _B to be connected are fitted into the hollow center of each of the conductors 3 _A and 3 _B so that they are in contact with the opposing end surfaces of the conductors 3 A and 3 B, and the axes of the conductors 3 _A and 3 _B are inserted. The flange parts _4A ' and _4B ' are brought into contact with each other to electrically connect them, and the compression sleeve 2 is fitted around the outer periphery of _the conductors _{3A and 3B} corresponding to the steel cores 4A and 4B. The sleeve 2 is compressed and crimped onto the conductors _3A and _3B , and the inner circumference of the conductor _A is attached to the outer circumference of the steel core _4A , and the inner circumference of the conductor _3B is attached to the outer circumference of the steel core _4B . The connection portions of the conductors 3 _A and 3 B are constructed by crimping and fixing the conductors 3 A and 3 _B , respectively. In this case, the configuration of the connection between the hollow circular stranded conductors 3 _A and 3 _B can be easily, quickly and compactly formed even in large-sized cables, but the steel cores 4 _A and 4 _B simply abut against each other. The tensile force is generated by the gripping force of the crimping surface F between the compression sleeve 2 and the conductors 3 _A and 3 _B , and the gripping force is due to the compression The tensile strength of the cross-sectional area S of the central portion XX of the sleeve 2 determines the tensile strength at the connection between the conductors _3A and _3B . Therefore, the tensile strength at the connection between the conductors 3 _A and 3 _B formed by the above structure has the disadvantage that the steel cores 4 _A and 4 _B are reduced to the extent that they no longer contribute to the tensile strength, and in some cases, the tensile force may cause the wire to break. There is a risk that accidents such as these may occur.

(Means for Solving the Problems) This invention was made in view of the above, and includes carving a male thread on the outer periphery of one steel core end, forming a flange on the outer periphery of the engraved end, and forming a flange on the outer periphery of the engraved end. A steel core is provided with a male end formed by drilling a small through hole parallel to the central axis in one end, and an enlarged diameter cylindrical body is formed at the other end of the steel core, and the inner circumferential surface of the cylindrical body has the above-mentioned shape. A steel core having a female end formed by carving a female thread to be screwed into the male thread at the male end and drilling a small hole perpendicular to the steel core axis on the outer periphery of the enlarged diameter cylindrical body; A steel core is inserted into the hollow part of the conductor having a circular cross section so that the flange at the part and the rear surface of the enlarged diameter cylindrical body at the female end come into contact with the end face of the conductor to be connected, and A pin is inserted into the drilled small hole, and its tip is driven into the gap between the wires constituting the conductor, and the steel core is fixed so that it does not rotate relative to the conductor. A compression sleeve having a small hole drilled at a position is fitted so as to straddle both the conductors and cover both the steel cores, and the small hole is drilled at the outer periphery of the enlarged diameter cylindrical body of the female end. After inserting a common pin into the small hole drilled in the compression sleeve, rotating the female end together with the compression sleeve, and screwing the female end to the male end to integrate the steel core. , characterized in that the outer and inner peripheries of the conductor to be connected by compressing the compression sleeve are respectively crimped to the compression sleeve and the integrated steel core.

(Embodiments) The present invention will be described in detail below with reference to the drawings showing embodiments thereof. Figures 4 and 5 are explanatory diagrams of the steel cores 21 _A and 21 _B , which are divided into two parts at the center in the longitudinal direction and are inserted opposite to the end of the central hollow part of the hollow circular stranded wire conductor to be connected. And,
FIG. 4a shows a symmetrical half of the longitudinal section of the steel core _21A with respect to the central axis, and FIG. 4b shows a side view of the symmetrical half of the steel core _21A with respect to the central axis. FIG. 5a shows a symmetrical half of the central vertical section of the steel core _21B with respect to the central axis, and FIG. 5b shows a side view of the symmetrical half of the steel core _21B with respect to the central axis. In Fig. 4, the steel core _21A is formed into a cylindrical shape, and a male thread Sm is spirally carved on the outer periphery of one end portion.
A flange _21A ' is formed on the outer periphery of the engraved end, and a pin insertion hole A is provided in the flange _{21A '} in parallel to the central axis of the steel core 21A. Male end 21m of steel core _21A with Sm and flange _21A '
is formed. In FIG. 5, the steel core _21B is formed into a cylindrical shape with the same dimensions as the steel core _21A , and one end thereof is formed with an enlarged diameter cylindrical body _21B ' that shares the same central axis as the steel core _21B . A male thread is spirally carved into one end of the steel core _21A on its inner peripheral surface.
A female thread Sf that is screwed into Sm is carved, and a pin insertion hole B is formed on the outer peripheral surface of the enlarged diameter cylindrical body 21 _{B '} .
The expanded diameter cylindrical body 2 is perforated perpendicularly to the central axis of the
_1B ' forms the female end _21f of the steel core _21B .
The diameter of the flange _21A ' at the male end 21m and the diameter of the enlarged diameter cylindrical body _21B ' at the female end _21B are the same size, and are formed smaller than the outer diameter of the conductor to be connected. Furthermore, the thread length L ₁ of the male end 21 m and the thread length L ₂ of the female end 21 _f are formed to have the same length. FIG. 6 shows a symmetrical half of the longitudinal section of the cylindrical compression sleeve 22, which is fitted and compressed over the outer periphery of each conductor to be connected when forming a conductor connection portion, with respect to the central axis. A small hole C is bored in the center in the longitudinal direction.

The structure of the hollow circular stranded wire conductor connection portion according to the present invention is composed of the above-mentioned members. FIG. 7 is a symmetrical half of a schematic vertical cross-sectional view for explaining the structure of the hollow circular stranded wire conductor connection portion according to the present invention with respect to the central axis. In FIG. 7, 23 _A and 23 _B are hollow circular stranded wire conductors to be connected. Said conductor _23A
The steel core _21A with the male end _21m shown in FIG. The outer peripheral surface of the steel core _21A and the conductor _23A are inserted so that the back surface is in contact with the end surface of the conductor _23A.
As shown in _FIG .
The protruding portion is driven into the gap between the strands of the conductor _23A so that the steel core _21A does not rotate with respect to the conductor _23A , and the tip of the conductor 23A is inserted.
The steel core 21 _B has a female end 2 _f shown in FIG. 5 at the end opposite to the hollow conductor 23 _A formed at the center _of the steel core 21 _B. 21
The end surface of the conductor _23B is inserted into the stepped portion of _B ' so that the outer peripheral surface of the steel core _21B and the inner peripheral surface of the conductor _23B are in contact with each other, and the compression sleeve 2 shown in FIG.
2 so as to straddle the conductors 23 _A and 23 _B , and loosely fit the pin 24 into the small hole C drilled at a preset position in the compression sleeve 22 and the small hole B at the female end 21 _f . After integrating, the female end 21 _f
If the compression sleeve 22 rotates integrally with the compression sleeve 22, the female end _21f will spiral over the male end 21m and the male end 21
When the front end surface of the female end 21 _f comes into close contact with the male thread Sm carved side surface of the flange 21 _A ′ at 1 m, the steel cores 21 _A and 21 _B are integrally connected, and the compression sleeve 22 is also attached to the female end. In response to the movement of the male end 21m of the male end _21f , the female end _21f moves integrally with the conductor _23A , _23B to the previously set integrally configured steel core position. Move to the corresponding position. After that, the conductor 23 _B is further pushed in by the amount of movement of the steel core 21 _B , and then the compression sleeve 22 is compressed, and the conductors 23 _A and 23 _B are pushed into the inner peripheral surface of the compression sleeve 22 and the integrally connected steel core 21 . _A , 21 _B
The connecting portion of the hollow circular stranded wire conductor is constructed by crimping and fixing it to the outer peripheral surface of the hollow circular stranded wire conductor.

(Effect of the invention) Since this invention has the structure and operation described above,
According to the present invention, the longitudinally divided steel core in the hollow circular stranded wire conductor connection part can be easily and quickly integrally joined to form a tensile strength member in the conductor connection part, The tensile strength of the connection can be easily and quickly increased, and the dimensions of the conductor connection can be reduced by setting the dimensions of the steel core and compression sleeve to have the desired tensile strength, which has practical effects. is large, and the conductor connection part according to this invention is a single-core OF
Suitable for application to conductor connections for cables.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the symmetrical half of the center longitudinal cross-section of a conventional joint of a small-sized hollow circular stranded wire conductor with respect to the central axis line, and Figure 2 is a conventional joint formation of a large-sized hollow circular stranded wire conductor. Side view for explaining means, 3rd
The figure is an explanatory symmetrical half-section in longitudinal cross-section of the main part of a conventional hollow circular stranded wire conductor connection section constructed using a two-part steel core, and FIGS. 4 to 8 are explanatory views of the present invention. 4
The figure is a schematic diagram showing the longitudinal section and side surface of one of the two-part steel cores constituting the hollow circular stranded conductor connection part, and Figure 5 is a schematic diagram showing the side surface of the other steel core, which is similar to Figure 4. A schematic diagram showing a vertical cross section and its side surface; FIG. 6 is a schematic diagram of a symmetrical half of a vertical cross section of a compression sleeve constituting a hollow circular stranded wire conductor connection section with respect to the center axis of the compression sleeve; FIG. 7 is a diagram showing a hollow circular stranded wire conductor. FIG. 8 is a symmetrical half-sectional view of a vertical cross section of the connecting portion for explaining the configuration of the connecting portion with respect to the center axis of the conductor, and FIG. 8 is a vertical cross section showing the state of pin insertion when the connecting portion is configured in the portion surrounded by the two-dot chain line in FIG. 4. . 21 _A , 21 _B ... Steel core, 21 _A '... Flange, 21
_B '... Expanded diameter cylindrical body part, 21 m... Male end, 21 _f
... Female end, 22 ... Compression sleeve, 23 _A , 2
3 _B ...Hollow circular stranded wire conductor, 24, 25...Pin, Sm...Male thread, Sf...Female thread, A, B, C
...Small hole.

Claims (1)

[Claims] 1 A male end is formed by carving a male thread on the outer periphery of one steel core end, forming a flange on the outer periphery of the engraved end, and drilling a small through hole in the flange in parallel to the central axis. An enlarged diameter cylindrical body is formed at the other end of the steel core, and a female thread is formed on the inner circumferential surface of the cylindrical body to be screwed into the male thread at the male end. A flange at the male end and a rear surface portion of the enlarged diameter cylindrical body at the female end connect the steel core with a female end formed by drilling a small hole perpendicular to the steel core axis on the periphery. A steel core is inserted into the hollow part of the conductor having a circular cross section so as to be in contact with the end face of the conductor, and a pin is inserted into the small hole drilled in the flange, and the tip part is inserted into the conductor. Drive it into the gap between the constituent wires,
After the steel core is fixed so as not to rotate with respect to the conductor, a compression sleeve having small holes drilled at preset positions is placed over both conductors and covers both the steel cores. a common pin is inserted into a small hole drilled in the outer periphery of the enlarged diameter cylindrical body of the female end and a small hole drilled in the compression sleeve, and the female end is rotated together with the compression sleeve; After screwing the female end to the male end to integrate the steel core, compress the compression sleeve to connect the outer and inner peripheries of the conductor to the compression sleeve and the integrated steel core, respectively. A hollow circular stranded wire conductor connection part characterized by being configured by being crimped to a steel core.