JP2019220395A - Connection member, branch connection structure of cable, cable with branch, manufacturing method of branch connection structure of cable, and rod-shaped member - Google Patents

Abstract

To provide a connection member that can connect a trunk conductor and a branch conductor having various sizes with a simple configuration.SOLUTION: A connection member for electrically connecting a trunk cable having a trunk conductor and a branch cable having a branch conductor includes a rod-shaped member for gripping the branch conductor, and a connecting member for gripping the rod-shaped member and the trunk conductor, and the rod-shaped member includes a first region having a storage hole into which a tip end of the branch conductor is inserted from one end surface side, and a second region gripped by the connecting member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connection member, a branch connection structure of a cable, a cable with a branch, a method of manufacturing a branch connection structure of a cable, and a rod-shaped member.

  Patent Literature 1 discloses a branch connection structure of a cable including a trunk cable and a branch cable electrically connected to the trunk cable as a cable used for electric wiring of a building, an apartment house, a factory, a tunnel, and the like. Have been. The trunk cable has a trunk conductor made of aluminum or an aluminum alloy. The branch line cable has a branch line conductor made of copper or a copper alloy. The main line cable and the branch line cable are compressed and connected to each other by a connector having a main line holding portion and a branch line holding portion for holding the main line conductor and the branch line conductor, respectively. The connector is an integral body in which the main line grip and the branch line grip are integrally formed.

JP 2017-4766 A

  The main conductor and the branch conductor each have various sizes (diameters). Therefore, in the case of a connector in which the main line holding portion and the branch line holding portion are integrally formed, various types of main line holding portions need to be used as the main line holding portion and the branch line holding portion corresponding to each size of the main line conductor and the branch line conductor. It is necessary to prepare various types of connectors corresponding to the number of combinations of the cable and the various types of branch line gripping portions. In general, connectors are cast using a mold or manufactured by extrusion using a metal mold. Therefore, various types of connectors corresponding to various types of connectors are required, and the manufacturing is likely to be complicated.

  Therefore, an object of the present disclosure is to provide a connection member that can connect a trunk conductor having various sizes and a branch conductor with a simple configuration. Further, the present disclosure provides a branch connection structure of a cable, a cable with a branch, a method of manufacturing a cable with a branch, and a rod-shaped member that can connect a trunk conductor and a branch conductor having various sizes with a simple configuration. Is another purpose.

The connection member according to the present disclosure,
A connecting member that electrically connects a trunk cable having a trunk conductor and a branch cable having a branch conductor,
A bar-shaped member having one end and the other end, and gripping the branch line conductor,
A connecting member that grips the rod-shaped member and the main conductor,
The rod-shaped member,
A first region having a storage hole into which the tip of the branch line conductor is inserted at one end,
A second region which is located on the other end side of the first region and is gripped by the connecting member.

The branch connection structure of the cable according to the present disclosure,
A trunk cable having a trunk conductor made of aluminum or an aluminum alloy,
A branch line cable having a branch line conductor made of copper or a copper alloy,
A branch connection structure for a cable including a connecting member that electrically connects the trunk cable and the branch cable,
The connection member is the connection member according to the present disclosure.

The cable with branch according to the present disclosure,
The branch connection structure for a cable according to the present disclosure is provided.

The method of manufacturing the branch connection structure according to the present disclosure,
Preparing a trunk cable having a trunk conductor;
Providing a branch line cable having a branch line conductor;
A step of preparing the connection member according to the present disclosure,
Electrically connecting the trunk cable and the branch cable via the connection member.

The rod-shaped member according to the present disclosure,
A rod-shaped body made of copper or copper alloy, a first region having a storage hole into which the tip of a branch line conductor made of copper or copper alloy is inserted at one end,
A rod-shaped body made of aluminum or an aluminum alloy and joined to the other end of the first area, comprising a main area conductor made of aluminum or an aluminum alloy and a second area gripped by a connecting member made of aluminum or an aluminum alloy.

  The connection member, the branch connection structure of the cable, the cable with a branch, the method of manufacturing the branch connection structure of the cable, and the rod-shaped member can connect the trunk conductor and the branch conductor having various sizes with a simple configuration.

It is a schematic structure figure showing the connecting member and the branch connection structure of the cable concerning an embodiment. It is a schematic disassembled block diagram which shows the connection member and the branch connection structure of a cable which concern on embodiment. It is a schematic perspective view which shows the connection member which comprises the connection member which concerns on embodiment. It is a schematic explanatory view showing a cable with a branch provided with a branch connection structure of a cable concerning an embodiment. It is a schematic side view which shows the modification of the rod-shaped member which comprises the connection member which concerns on embodiment. It is a schematic side view which shows another modification of the bar-shaped member which comprises the connection member which concerns on embodiment. It is a schematic block diagram which shows the modification of the connection part of the rod-shaped member and connection member in the connection member and the branch connection structure of a cable which concerns on embodiment.

[Description of Embodiment of the Present Invention]
First, the contents of the embodiment of the present invention will be listed and described.

(1) The connection member according to the embodiment of the present invention includes:
A connecting member that electrically connects a trunk cable having a trunk conductor and a branch cable having a branch conductor,
A bar-shaped member having one end and the other end, and gripping the branch line conductor,
A connecting member that grips the rod-shaped member and the main conductor,
The rod-shaped member,
A first region having a storage hole into which the tip of the branch line conductor is inserted at one end,
A second region which is located on the other end side of the first region and is gripped by the connecting member.

  The connection member is configured by a bar-shaped member that grips the branch conductor and a connecting member that grips the trunk conductor are independent members. By providing the first region having the storage hole at one end, the rod-shaped member can easily cope with branch line conductors having various sizes simply by changing the hole diameter of the storage hole. On the other hand, even when the diameter of the storage hole is changed, the rod-shaped member can be made uniform without changing the outer diameter of the second region gripped by the connecting member. The connecting member can easily cope with the main conductor having various sizes simply by changing the size of the region where the main conductor is gripped, and since the outer diameter of the second region of the rod can be uniform, the rod-shaped member is used. The size of the area to be gripped can be made uniform. Since the connection member has a uniform connection area between the rod-shaped member and the connection member, the size of the branch conductor does not affect the connection member, and the size of the main conductor does not affect the rod-shaped member. . Therefore, when the size of at least one of the branch line conductor and the main line conductor changes, the connection member separately prepares a rod-shaped member corresponding to the size of the branch line conductor and a connecting member corresponding to the size of the main line conductor. it can. Since the rod-shaped member and the connecting member can be prepared independently, a gripping portion that grips the main line conductor and the branch line conductor, respectively, as compared with a connection member in which the gripping portion that grips the main line conductor and the branch line conductor are integrally formed. The degree of freedom in combining parts is high, and the number of connecting members can be reduced. In addition, since the rod-shaped member and the connecting member can be prepared independently, the production of the rod-shaped member and the connecting member is easy, and the connection between the rod-shaped member and the connecting member is also easy.

  In the connection member, the holding region (storage hole) of the branch line conductor in the rod member and the holding region of the main conductor in the connection member are set independently of the connection region between the rod member and the connection member. The size of the connection area can be made larger than the grip area of each conductor. Specifically, the outer diameter of the second region of the rod-shaped member can be made larger than that of the first region. By increasing the outer diameter of the second region, the contact area between the rod-shaped member and the connecting member can be increased, and when the rod-shaped member and the connecting member are compressed and connected, the rod-shaped member and the connecting member can be firmly connected. .

  (2) As an example of the connection member, the first region and the second region are made of different metals, and are joined at end faces.

  The first region and the second region are made of different metals from each other, and when the connecting member is made of the same metal as the constituent metal of the second region, a branch line conductor made of the same metal as the constituent metal of the first region, The constituent metal of the second region and the main conductor made of the same metal can be easily connected. By inserting the branch line conductor into the storage hole of the first region, it is possible to suppress the occurrence of electrolytic corrosion between the first region (bar-shaped member) and the branch line conductor, and to grip the second region with the connecting member. This is because it is possible to suppress the occurrence of electrolytic corrosion between the second region (the rod-shaped member) and the connecting member. The first region and the second region are joined so that no gap is formed between the end faces, so that the occurrence of electrolytic corrosion between the end faces can be suppressed.

  In addition, since the first region and the branch line conductor can be connected by the same kind of metal, when the branch line conductor and the first region (bar-shaped member) are compressed and connected, stress relaxation hardly occurs in the connection region, and the branch region is branched. Since the wire conductor is easily compressed uniformly, it is easy to firmly connect the branch wire conductor and the rod-shaped member. In addition, since the second region, the connecting member, and the main conductor can be connected by the same kind of metal, when the second region (bar-shaped member), the connecting member, and the main conductor are compressed and connected, stress relaxation occurs in the connection region. Since it is difficult to compress the rod-shaped member and the trunk conductor uniformly, it is easy to firmly connect the rod-shaped member, the connecting member and the trunk conductor.

  (3) As an example of the connection member in which the first region and the second region are made of different metals, the first region is made of copper or a copper alloy, and the second region is made of aluminum or an aluminum alloy. Is mentioned.

  Since the first region is made of copper or a copper alloy, a branch line conductor made of copper or a copper alloy can be easily connected. This is because the first region (bar-shaped member) and the branch line conductor can be connected by the same metal. When the branch line conductor is made of copper or a copper alloy, the terminal treatment is easily performed and the workability is excellent. Copper or copper alloy has been used for conductors of cables used for electrical wiring in buildings and the like, and parts and tools necessary for terminal treatment of copper or copper alloy conductors have been widely used. This is because it does not require a high degree of skill of the person. Since the second region is made of aluminum or an aluminum alloy, the main conductor made of aluminum or an aluminum alloy can be easily connected when the connecting member is made of aluminum or an aluminum alloy. This is because the second region (bar-shaped member), the connecting member, and the main conductor can be connected with the same metal. Since the second region is made of aluminum or an aluminum alloy, the rod-shaped member can be reduced in weight. Further, since the connecting member and the trunk conductor are made of aluminum or an aluminum alloy, the weight of the connecting member itself and the weight of the trunk cable can be reduced.

  (4) As an example of the connection member, the inner peripheral surface of the storage hole may be made of copper or a copper alloy.

  Even when the inner peripheral surface of the storage hole is made of copper or a copper alloy, even if the region other than the inner peripheral surface of the rod-shaped member is made of a metal other than copper or a copper alloy, a branch line conductor made of copper or a copper alloy Can be easily connected. This is because the inner peripheral surface of the storage hole and the branch line conductor can be connected by the same kind of metal.

  (5) As an example of the connection member, the connection member may grip the second region without gripping the first region.

  The connection between the connecting member and the rod-shaped member and the connection between the rod-shaped member and the branch line conductor are performed independently by the connecting member gripping the second region without gripping the first region of the rod-shaped member. Can be. Therefore, when the first region and the second region are made of different metals from each other, and the connecting member is made of the same metal as the constituent metal of the second region, a branch line conductor made of the same metal as the constituent metal of the first region, The constituent metal of the second region and the main conductor made of the same metal can be easily connected.

  (6) As an example of the connection member, the rod-shaped member includes a third region on the opposite side to the first region across the second region, and the third region is in a longitudinal direction of the rod-shaped member. Providing a protruding portion that protrudes in the intersecting direction is included.

  By providing the bar-shaped member with the protruding portion, even if the bar-shaped member is shifted to the first region side (the side to which the branch line conductor is connected) with respect to the connecting member, the protruding portion is caught by the connecting member, so that the bar-shaped member is It can be prevented from falling off from the connecting member.

  (7) As an example of the connection member including the third region having a protrusion on the rod-shaped member, the protrusion may be in contact with an end surface of the connection member.

  Even when a large tensile force is applied to the connection region between the rod-shaped member and the connecting member due to the projecting portion of the rod-shaped member coming into contact with the end surface of the connecting member, the rod-shaped member is easily prevented from falling off from the connecting member.

  (8) As an example of the connection member, the connection member may be made of aluminum or an aluminum alloy.

  Since the connecting member is made of aluminum or an aluminum alloy, the weight of the connecting member can be reduced.

  (9) As an example of the connection member, the connection member may include a first grip portion that grips the main conductor and a second grip portion that grips the rod-shaped member.

  By providing the first holding portion and the second holding portion in the connecting member, the connecting member can independently hold the main conductor and the rod-shaped member.

  (10) As an example of the connection member including a first grip portion in the connection member, the first grip portion includes a first opening connecting one end and the other end of the connection member, and a shaft of the first opening. A first slit formed in the first opening and capable of accommodating the main conductor in the first opening, the first opening having an inner peripheral length corresponding to the outer peripheral length of the main conductor. An inner peripheral surface is provided.

  The trunk conductor is exposed in the longitudinal direction of the trunk cable. Therefore, by providing the first opening and the first slit in the first holding portion, the main conductor can be accommodated in the first opening through the first slit, and the main conductor can be easily held by the connecting member.

  (11) As an example of the connection member including the second grip portion in the connection member, the second grip portion includes a second opening connecting one end and the other end of the connection member, and the second opening is And a second inner peripheral surface having an inner peripheral length corresponding to the outer peripheral length of the rod-shaped member.

  The bar-shaped member is provided at one end of the branch line cable. Therefore, by providing the second opening in the second gripping portion, the rod-shaped member can be inserted from one end of the second opening, and the rod-shaped member can be easily gripped by the connecting member.

  (12) As an example of the connection member, the trunk conductor may be made of aluminum or an aluminum alloy, and the branch conductor may be made of copper or a copper alloy.

  Since the trunk conductor is made of aluminum or an aluminum alloy, the weight of the trunk cable can be reduced. Further, since the branch line conductor is made of copper or a copper alloy, the terminal treatment is easily performed and the workability is excellent.

(13) The branch connection structure of the cable according to the embodiment of the present invention includes:
A trunk cable having a trunk conductor made of aluminum or an aluminum alloy,
A branch line cable having a branch line conductor made of copper or a copper alloy,
A branch connection structure for a cable including a connecting member that electrically connects the trunk cable and the branch cable,
The connection member is the connection member according to any one of (1) to (12).

  Since the branch connection structure of the cable electrically connects the trunk cable and the branch cable using the connection member according to the embodiment of the present invention, the trunk conductor and the branch line conductor having various sizes are connected. In addition to being easily connected, the trunk conductor and the branch conductor can be firmly connected.

  (14) As an example of the branch connection structure of the cable, it is possible to further include a resin mold portion covering the connection member and the trunk conductor and the branch line conductor connected by the connection member.

  By covering the connection member, and the trunk conductor and the branch line conductor connected by the connection member with the resin mold portion, the connection region of each member can be protected from the external environment.

  (15) The cable with branch according to the embodiment of the present invention includes the cable branch connection structure according to (13) or (14).

  Since the branching cable is configured by the branch connection structure of the cable according to the embodiment of the present invention, the trunk conductor and the branch line conductor having various sizes can be easily connected, and the trunk conductor and the branch line conductor can be easily connected. Can be firmly connected.

(16) The method of manufacturing the branch connection structure for a cable according to the embodiment of the present invention includes:
Preparing a trunk cable having a trunk conductor;
Providing a branch line cable having a branch line conductor;
Preparing the connection member according to any one of the above (1) to (12);
A connection step of electrically connecting the trunk cable and the branch cable via the connection member.

  In the method of manufacturing a cable with a branch, since the trunk cable and the branch cable are electrically connected using the connecting member according to the embodiment of the present invention, the trunk conductor and the branch conductor having various sizes can be easily connected. And the trunk line conductor and the branch line conductor can be firmly connected.

(17) As an example of a method of manufacturing the branch connection structure of the cable,
The connecting step includes:
A step of compressing the first region so that a tip end of the branch line conductor is gripped in the storage hole;
Compressing the connecting member so that the second region of the rod-shaped member and the main conductor are gripped by the connecting member.

  By compressing the first region of the rod-shaped member and compressing the connecting member itself, the branch line cable and the trunk cable can be electrically easily connected via the rod-shaped member and the connecting member.

(18) The rod-shaped member according to the embodiment of the present invention includes:
A rod-shaped body made of copper or copper alloy, a first region having a storage hole into which the tip of a branch line conductor made of copper or copper alloy is inserted at one end,
A rod-shaped body made of aluminum or an aluminum alloy and joined to the other end of the first area, comprising a main area conductor made of aluminum or an aluminum alloy and a second area gripped by a connecting member made of aluminum or an aluminum alloy.

  Since the first region is made of copper or a copper alloy, a branch line conductor made of copper or a copper alloy can be easily connected to the rod-shaped member. On the other hand, since the second region is made of aluminum or an aluminum alloy, the rod-shaped member and the main conductor made of aluminum or the aluminum alloy can be easily connected by the connecting member made of aluminum or the aluminum alloy. That is, the rod-shaped member can easily connect conductors made of different kinds of metals to each other.

  (19) As an example of the rod-shaped member, a third region is provided on the opposite side of the first region from the second region, and the third region protrudes in a direction intersecting the longitudinal direction of the rod-shaped member. And a protruding portion.

  Providing the bar-shaped member with the protruding portion allows the protruding portion to function as an engaging portion for the connecting member when the bar-shaped member is gripped by the connecting member. For example, when the rod-shaped member penetrates the connecting member, the protrusion is hooked on the connecting member, so that the rod-shaped member can be prevented from falling off the connecting member.

[Details of Embodiment of the Present Invention]
Embodiments of the present invention will be described in detail below with reference to the drawings. It should be noted that the present invention is not limited to these exemplifications, but is indicated by the claims, and is intended to include all modifications within the scope and meaning equivalent to the claims. The same reference numerals in the drawings indicate the same names.

≪Overview≫
In the embodiment, as shown in FIG. 4, a connection member for electrically connecting a trunk cable 4 and a branch cable 5 constituting the branch cable 3 is exemplified by a branch cable 3 arranged in a building. 1 (FIG. 1) and a branch connection structure 2 of a cable including the connection member 1 will be described. As shown in FIGS. 1 and 2, the main cable 4 includes a main conductor 4a and a coating layer 4b that covers the main conductor 4a. Similarly, the branch line cable 5 includes a branch line conductor 5a and a coating layer 5b that covers the branch line conductor 5a. In the trunk cable 4, the coating layer 4b is peeled off in the middle of the longitudinal direction, and the trunk conductor 4a is exposed. The exposed portion of the trunk conductor 4a becomes a connection region with the branch line cable 5. On one end side of the branch line cable 5, the coating layer 5b is peeled off, and the branch line conductor 5a is exposed. The connecting member 1 electrically connects the exposed trunk conductor 4 a of the trunk cable 4 to the exposed branch conductor 5 a of the branch cable 5. As shown in FIGS. 1 to 3, the connection member 1 according to the embodiment is characterized in that a bar-shaped member 10 for gripping the branch line conductor 5a and a connecting member 20 for gripping the rod-shaped member 10 and the trunk conductor 4a are provided. One of Hereinafter, first, the detailed configuration of the connection member 1 will be described, and then the detailed configuration of the branch connection structure 2 for a cable including the connection member 1 will be described.

≪Connecting member≫
As shown in FIGS. 1 and 2, the connection member 1 includes a rod-shaped member 10 for gripping the branch line conductor 5a, and a connecting member 20 for gripping the rod-shaped member 10 and the trunk conductor 4a. The rod-shaped member 10 and the connecting member 20 are configured as independent members. FIG. 1 shows a state in which the members are compressed and connected so that the bar-shaped member 10 grips the branch line conductor 5a and the connecting member 20 grips the bar-shaped member 10 and the trunk conductor 4a. FIG. 2 shows a state before each member is assembled.

(Bar-shaped member)
As shown in FIGS. 1 and 2, the rod-shaped member 10 includes a first region 11 that holds the branch line conductor 5 a and a second region 12 that is held by the connecting member 20. In this example, the rod-shaped member 10 includes a third region 13 on the opposite side of the second region 12 from the first region 11. The first area 11, the second area 12, and the third area 13 are arranged continuously. The cross-sectional shape of the rod-shaped member 10 includes a circle, an ellipse, a polygon such as a rectangle and a hexagon, and the like. In this example, the bar member 10 is a round bar member having a circular cross section.

(First area)
The first region 11 has a storage hole 111 at one end into which the tip of the branch line conductor 5a is inserted. The storage hole 111 is a blind hole into which the tip of the branch line conductor 5a can be inserted. In this example, the storage hole 111 has a circular cross section corresponding to the outer diameter of the branch line conductor 5a. The first region 11 is compressed with the branch line conductor 5a inserted into the storage hole 111. The outer diameter of the first region 11 can form a storage hole 111 that is open at the end face of the first region 11, and can be appropriately selected to a size that can be compressed while the branch line conductor 5 a is inserted into the storage hole 111.

  The first region 11 is preferably made of the same metal as the metal of the branch line conductor 5a to be inserted. For example, when the branch line conductor 5a is made of copper or a copper alloy, the first region 11 may be made of copper or a copper alloy. As copper (Cu), pure Cu such as tough pitch copper (containing 0.02 to 0.05% by mass of oxygen, the balance being Cu and unavoidable impurities) can be used. As the copper (Cu) alloy, those having various compositions containing an additive element and the balance consisting of Cu and unavoidable impurities can be used. Examples of the additional element include one or more selected from tin (Sn), Ni, Si, Fe, phosphorus (P), Ag, Cr, Mg, titanium (Ti), cobalt (Co), and the like. The total content of the additional elements is 0.005% by mass or more and 15% by mass or less, and further 0.05% by mass or more and 10% by mass or less. Examples of the content of each element include Sn of 0.005% by mass or more and 10% by mass or less, and Ni of 0.005% by mass or more and 10% by mass or less. Examples of such an alloy include a Cu-Sn alloy, a Cu-Ni-Si alloy, a Cu-Mg alloy, a Cu-Fe alloy, a Cu-Ag alloy, and a Cu-Co-P alloy.

(Second area)
The second region 12 is a region to be gripped by the connecting member 20, and is configured as a solid rod. The second area 12 has an end face joined to the end face of the first area 11. The first region 11 and the second region 12 are joined so that no gap is generated between the end faces. Specifically, the metal atoms constituting the first region 11 and the metal atoms constituting the second region 12 are joined so as to form a metal bond. Examples of the bonding in which metal atoms of the first region 11 and the second region 12 are metal-bonded include, for example, bonding by friction welding. Since the first region 11 and the second region 12 are metal-bonded and joined, no gap is formed between the first region 11 and the second region 12, and the first region 11 and the second region 12 Electric corrosion can be prevented from occurring between the two. Further, since the first region 11 and the second region 12 are joined by metal bonding, even when the first region 11 and the second region 12 are made of dissimilar metals, the first region 11 and the second region 12 can be connected to each other. The second region 12 can be regarded as an integral object, and the occurrence of breakage such as a crack between the first region 11 and the second region 12 can be prevented.

  The outer diameter of the second area 12 may be the same as or different from the outer diameter of the first area 11. When the outer diameter of the second area 12 is the same as the outer diameter of the first area 11, the rod-shaped member 10 is easily manufactured. On the other hand, when the outer diameter of the second region 12 is larger than the outer diameter of the first region 11, the contact area between the second region 12 (the rod-shaped member 10) and the connecting member 20 can be increased, and the rod-shaped member 10 and the connecting member 20 When they are connected by compression, the rod-shaped member 10 and the connecting member 20 can be firmly connected.

  The second region 12 is preferably made of the same kind of metal as the metal of the connecting member 20 to be gripped. For example, when the main conductor 4a is made of aluminum or an aluminum alloy, the connecting member 20 and the second region 12 may be made of aluminum or an aluminum alloy. As aluminum (Al), pure Al having a purity of 99% by mass or more can be used. As the aluminum (Al) alloy, those having various compositions containing an additive element and the balance of Al and unavoidable impurities can be used. Examples of the additional element include iron (Fe), magnesium (Mg), silicon (Si), copper (Cu), zinc (Zn), nickel (Ni), manganese (Mn), silver (Ag), and chromium (Cr). , Zirconium (Zr) and the like. The total content of the additional elements is 0.005% by mass or more and 3.0% by mass or less, and further 0.05% by mass or more and 1.5% by mass or less. Examples of the content of each element include Fe of 0.005% by mass to 1.5% by mass, and Mg of 0.005% by mass to 1.0% by mass. Examples of such an Al alloy include an Al—Fe alloy, an Al—Fe—Mg alloy, an Al—Fe—Si alloy, an Al—Fe—Mg— (Mn, Ni, Zr, Ag) alloy, and an Al—Fe— alloy. Cu alloys, Al-Fe-Cu- (Mg, Si) alloys, Al-Mg-Si-Cu alloys and the like can be mentioned.

(Third area)
The third region 13 includes a protrusion 131 that protrudes in a direction intersecting with the longitudinal direction of the rod-shaped member 10. When the bar-shaped member 10 is shifted to the first region 11 side (the side to which the branch line conductor 5a is connected) with respect to the connecting member 20, the protrusion 131 is hooked on the connecting member 20 so that the bar-shaped member 10 is connected. It has a retaining function to prevent the member 20 from falling off. In this example, the protrusion 131 protrudes over the entire circumference of the rod-shaped member 10 in a direction orthogonal to the longitudinal direction of the rod-shaped member 10. That is, the third region 13 is formed of a column having a larger outer diameter than the second region 12. In this example, the protruding portion 131 is provided so as to be in contact with the end surface of the connecting member 20. By providing the protruding portion 131 so as to be in contact with the end surface of the connecting member 20, even if a large tensile force is applied to the connecting region between the second region 12 (the bar-shaped member 10) and the connecting member 20, the bar-shaped member 10 can be moved. It is easy to suppress falling off from the connecting member 20. As for the connection strength between the connecting member 20 and the bar-shaped member 10, the ratio (the connection strength between the connecting member 20 and the bar-shaped member 10 / the breaking load of the branch line conductor 5a) to the breaking load of the branch line conductor 5a is 80% or more, preferably. It is preferable to satisfy 90% or more. By providing the projection 131 in the third region 13, the above ratio can be easily satisfied.

  The shape of the projecting portion 131 is not particularly limited as long as it can prevent the rod-shaped member 10 from falling off from the connecting member 20. For example, the protruding portion 131 may be configured by a protruding piece that protrudes from an end of the rod-shaped member 10 in a direction intersecting the longitudinal direction of the rod-shaped member 10. When the protruding portion 131 is formed of a protruding piece, it is preferable to provide a plurality of protruding pieces at equal intervals along the circumferential direction of the rod-shaped member 10. An appropriate shape such as a rod shape or a fan shape can be selected as the shape of the projecting piece.

(Connecting member)
As shown in FIG. 3, the connecting member 20 is a block-shaped member including a first grip 21 and a second grip 22 provided in parallel. The connecting member 20 is a member in which a pair of C-shaped members constituting the first grip 21 and the second grip 22 are integrated such that the opening directions of the slits 21s and 22s are different. The connecting member 20 holds the main conductor 4a with the first holding portion 21 and holds the rod-shaped member 10 with the second holding portion 22 (see also FIG. 1).

  The connecting member 20 is preferably made of the same kind of metal as the metal of the main conductor 4a to be gripped. For example, when the main conductor 4a is made of aluminum or an aluminum alloy, the connecting member 20 may be made of aluminum or an aluminum alloy. As for aluminum or an aluminum alloy, the same aluminum or aluminum alloy as the second region 12 of the rod-shaped member 10 described above can be used.

(First grip)
The first grip 21 includes a first opening 21o that connects one end and the other end of the connecting member 20, and a first slit 21s that can accommodate the main conductor 4a in the first opening 21o. The trunk conductor 4a is exposed in the middle of the trunk cable 4 in the longitudinal direction. Therefore, by providing the first opening 21o and the first slit 21s in the first grip portion 21, the main conductor 4a can be accommodated in the first opening 21o via the first slit 21s. The first slit 21s is formed along the axial direction of the first opening 21o, and a width capable of accommodating the main conductor 4a in the first opening 21o can be appropriately selected. The width of the first slit 21s is larger than the outer diameter of the main conductor 4a. The first opening 21o includes a first inner peripheral surface 21i having an inner peripheral length corresponding to the outer peripheral length of the main conductor 4a. The inner circumference corresponding to the outer circumference of the main conductor 4a is an inner circumference that covers 90% or more of the entire circumference of the main conductor 4a after compression.

(Second grip)
The second grip 22 includes a second opening 22o that connects one end and the other end of the connecting member 20. The second opening 22o is provided in parallel with the first opening 21o. The rod-shaped member 10 is provided at one end of the branch line cable 5. Therefore, the second grip 22 can insert the bar-shaped member 10 from one end of the second opening 22o. The second opening 22o includes a second inner peripheral surface 22i having an inner peripheral length corresponding to the outer peripheral length of the rod-shaped member 10. The inner peripheral length corresponding to the outer peripheral length of the rod-shaped member 10 is an inner peripheral length that covers 90% or more of the entire peripheral length of the rod-shaped member 10 after compression. In this example, the second grip 22 has a second slit 22s along the axial direction of the second opening 22o. However, since the rod-shaped member 10 can be inserted from one end of the second opening 22o, the width of the second slit 22s is smaller than the outer diameter of the first region 11 or the second region 12 of the rod-shaped member 10. Is also good. In addition, the second grip 22 may not include the second slit 22s.

  When the first region 11 of the rod-shaped member 10 is made of copper or a copper alloy, the second region 12 is made of aluminum or an aluminum alloy, and the connecting member 20 is made of aluminum or an aluminum alloy, the second grip portion 22 It is preferable to hold the second area 12 without holding the one area 11. By doing so, the rod-shaped member 10 and the connecting member 20 can be connected by the same kind of metal. By being able to be connected by the same kind of metal, it is possible to prevent the occurrence of electrolytic corrosion between the rod-shaped member 10 and the connecting member 20. In addition, since the connection can be made with the same kind of metal, when the rod-shaped member 10 and the connecting member 20 are connected by compression, stress relaxation hardly occurs, and the rod-shaped member 10 is easily compressed uniformly. The member 20 can be firmly connected.

分岐 Branch connection structure of cable≫
As shown in FIG. 1, the cable branch connection structure 2 includes the above-described connection member 1, and a trunk cable 4 and a branch line cable 5 that are electrically connected using the connection member 1. The trunk cable 4 and the branch cable 5 are connected in advance in the factory using the connecting member 1 on the basis of the electrical wiring diagram at the location where the cables are arranged, thereby forming the branch cable 3. For example, as shown in FIG. 4, the branching cable 3 for a building includes a trunk cable 4 extending from the floor having the electric room 9 a of the building to each floor and a connecting member 1 (FIG. 1) in the middle of the trunk cable 4. And the required number of branch line cables 5 for each floor electrically connected by using A cable grip 8 for hanging the branched cable 3 to a building is attached to a distal end of the trunk cable 4.

[Trunk cable]
The trunk cable 4 includes a trunk conductor 4a and a coating layer 4b that covers the trunk conductor 4a. The composition of the main conductor 4a can use the same aluminum or aluminum alloy as the second region 12 of the rod-shaped member 10 in the connection member 1.

  Examples of the trunk conductor 4a include a single wire made of Al or an Al alloy described above, a stranded wire obtained by twisting a plurality of single wires, and a compressed wire material obtained by compression-molding a stranded wire. The cross-sectional shape of the trunk conductor 4a may be a circle, an ellipse, a polygon such as a rectangle or a hexagon, or the like. In this example, the trunk conductor 4a is formed of a stranded wire having a circular cross section.

  The coating layer 4b may be formed of, for example, polyvinyl chloride (PVC), polyethylene (PE), a halogen-free resin, an insulating material having excellent flame retardancy, or the like. The material and thickness of the coating layer 4b can be appropriately selected in consideration of a desired insulation strength.

  In this example, as shown in FIG. 4, the trunk cable 4 has a length extending from the floor having the electric room 9a of the building to each floor. The trunk cable 4 has a portion where the coating layer 4b is peeled off in the longitudinal direction corresponding to each floor to expose the trunk conductor 4a (FIGS. 1 and 2). The branch line conductor 5a of the branch line cable 5 described later is connected to the exposed main line conductor 4a using the connection member 1.

  In this example, the trunk cable 4 has a portion where the coating layer 4b is peeled off on the side of the electric room 9a and the trunk conductor 4a is exposed. The conductor of the end cable 7 connected to the electric equipment in the electric room 9a is connected to the exposed main conductor 4a. The end cable 7 has a conductor made of copper or a copper alloy, and has the same current capacity as the trunk cable 4. The main conductor 4a and the conductor of the end cable 7 can be connected using the same connection member as the connection member 1 described above. Specifically, the conductor of the end cable 7 is inserted into the storage hole 111 of the rod-shaped member 10, the main conductor 4 a is inserted into the first grip 21 of the connecting member 20, and the second grip 22 of the connecting member 20 is inserted into the second grip 22. The rod-shaped member 10 is inserted, and the connecting member 20 is compressed. By doing so, the trunk conductor 4a and the conductor of the end cable 7 can be electrically connected via the connecting member 20 and the rod-shaped member 10. That is, by electrically connecting the trunk cable 4 and the end cable 7 using the connection member, the end connection structure 2e is configured. By interposing the end cable 7 between the main cable 4 and the electric equipment in the electric room 9a, the terminal treatment of the cable in the electric room 9a can be easily performed, and the workability can be improved.

  Alternatively, the trunk conductor 4a and the conductor of the end cable 7 can be connected using the same bar-shaped member as the bar-shaped member 10 constituting the connection member 1 described above. This rod-shaped member has a storage hole for inserting the conductor of the end cable 7 on the end face on the first area side, and a storage hole for inserting the main conductor 4a on the end face on the second area side. By inserting each conductor into each storage hole and compressing each conductor, the trunk conductor 4a and the conductor of the end cable 7 can be electrically connected via the rod-shaped member.

[Branch cable]
The branch line cable 5 includes a branch line conductor 5a and a coating layer 5b that covers the branch line conductor 5a. As the composition of the branch line conductor 5a, the same copper or copper alloy as that of the first region 11 of the rod-shaped member 10 in the connection member 1 can be used.

  Examples of the branch line conductor 5a include a single wire made of the above-described Cu or Cu alloy, a stranded wire obtained by twisting a plurality of single wires, and a compressed wire material obtained by compression-molding a stranded wire. The cross-sectional shape of the branch line conductor 5a includes a circle, an ellipse, a polygon such as a rectangle and a hexagon, and the like. In this example, the branch line conductor 5a is formed of a stranded wire having a circular cross section.

  The coating layer 5b may be composed of, for example, PVC, polyethylene (PE), a non-halogen resin, an insulating material having excellent flame retardancy, or the like. The material and thickness of the coating layer 5b can be appropriately selected in consideration of a desired insulation strength.

  In this example, as shown in FIG. 4, the required number of branch line cables 5 are connected to the trunk cable 4 at each floor of the building, and have a length extending from the trunk cable 4 to each floor. The branch line cable 5 has a portion where the coating layer 5b is peeled off and the branch line conductor 5a is exposed at one end side (FIGS. 1 and 2). The exposed branch line conductor 5a is connected to the exposed main line conductor 4a using the connection member 1. The other end of the branch line cable 5 is subjected to terminal processing, and is connected to each electric device (a general outlet, a lighting fixture, a distribution board, etc.) 9b on each floor.

製造 Method of manufacturing cable branch connection structure 分岐
The above-described cable branch connection structure 2 typically includes a step of preparing the trunk cable 4 and the branch cable 5, a step of preparing the connection member 1, and a step of preparing the trunk cable 4 and the branch line via the connection member 1. And a step of electrically connecting the cable 5. The step of electrically connecting the trunk cable 4 and the branch line cable 5 via the connection member 1 includes, specifically, a step of exposing the trunk line conductor 4a and the branch line conductor 5a, respectively, and a step of exposing the trunk line conductor 4a by the connection member 1. And compressing and connecting the respective members so as to grip the branch line conductor 5a. The cable branch connection structure 2 is pre-assembled at a factory.

[Process of preparing trunk cable and branch cable]
A trunk cable 4 having a trunk conductor 4a and a branch cable 5 having a branch conductor 5a are prepared.

[Step of preparing connection member]
As the connecting member 1, a rod-shaped member 10 corresponding to the size of the branch line conductor 5a and a connecting member 20 corresponding to the size of the main line conductor 4a are independently prepared.

  The rod-shaped member 10 is obtained by forming a storage hole 111 corresponding to the outer diameter of the branch line conductor 5a on the end face of a rod-shaped material having a predetermined outer diameter. When the rod-shaped member 10 includes the first region 11 and the second region 12 made of dissimilar metals, the first rod-shaped material made of the constituent metal of the first region 11 and the second rod-shaped material made of the constituent metal of the second region 12 Are prepared, and the end surfaces of the first rod-shaped material and the second rod-shaped material are brought into contact with each other, and a large pressure is applied to the contact surfaces to join them. Specifically, the end faces of both rod-shaped materials are rubbed at a high speed while rotating each axis of the first rod-shaped material and the second rod-shaped material as a rotation axis. The contact interface between the rod-shaped materials is softened by frictional heat generated at that time, and at the same time, pressure is applied to join (friction welding). By this friction welding, the metal atoms constituting the first rod-shaped material and the metal atoms constituting the second rod-shaped material are brought into a metal-bonded state. It should be noted that a material having a predetermined outer diameter is used as the first rod-shaped material, and a material having a predetermined outer diameter is used as the second rod-shaped material. Then, a storage hole 111 corresponding to the outer diameter of the branch line conductor 5a is formed on the end face of the rod-shaped material that has been friction-welded on the first rod-shaped material side. When the third region 13 having the protruding portion 131 is integrally provided on the rod-shaped member 10, the outer periphery of the prepared rod-shaped material other than the region to be the third region 13 may be cut off. In this case, a rod-shaped material is prepared such that the second region 12 after shaving has a predetermined outer diameter.

  The connecting member 20 is cast using a mold having a portion corresponding to the outer diameter of the main conductor 4a and a portion corresponding to the outer diameter of the second region 12 of the rod-shaped member 10, or is extruded using a mold. Is obtained.

[Steps of exposing the main conductor and the branch conductor, respectively]
Based on the electrical wiring diagram of the location of the branching cable 3, the coating layer 4 b is peeled off at the connection area with the branch line cable 5 in the longitudinal direction of the trunk line 4, exposing the trunk line conductor 4 a. At each end of the required number of branch line cables 5, the coating layer 5b is peeled off to expose the branch line conductor 5a.

[Step of gripping trunk conductor and branch conductor with connecting member]
The exposed trunk conductor 4a is housed in the first opening 21o via the first slit 21s of the connecting member 20. On the other hand, the rod-shaped member 10 is inserted into the second opening 22o of the connection member 20 from the first region 11 side, and the protrusion 131 of the third region 13 is brought into contact with one end surface of the connection member 20, and the first region 11 is exposed from the other end surface of the connecting member 20. The tip of the branch line conductor 5a is inserted into the storage hole 111 of the rod-shaped member 10.

  The connecting member 20 is compressed while the second region 12 of the rod-shaped member 10 and the main conductor 4 a are arranged at predetermined positions of the connecting member 20. By compressing the connecting member 20, the connecting member 20 and the main conductor 4a are connected, and the connecting member 20 and the rod-shaped member 10 are connected. Further, the first region 11 is compressed while the distal end of the branch line conductor 5a is inserted into the storage hole 111 in the first region 11 of the rod-shaped member 10. By compressing the first region 11, the rod-shaped member 10 and the branch line conductor 5a are connected. By compressing and connecting the members, the trunk conductor 4a and the branch conductor 5a can be electrically connected via the connecting member 20 and the rod-shaped member 10. Either the compression of the connecting member 20 or the compression of the first region 11 may be performed first. Further, when the third region 13 of the rod-shaped member 10 has a size that can be inserted into the second grip portion 22 of the connecting member 20, or when the second region 12 of the rod-shaped member 10 is inserted through the second slit 22 s of the connecting member 20. When the rod-shaped member 10 can be accommodated in the second opening 22o, the branch line conductor 5a can be compression-connected to the first region 11 before the rod-shaped member 10 is gripped by the connecting member 20. In that case, the bar-shaped member 10 with the branch line conductor 5 a is gripped by the second gripping portion 22, and the bar-shaped member 10 is compression-connected to the connecting member 20.

  Finally, the resin mold portion 6 (FIG. 1) is formed by injection molding so as to cover the connecting member 1 and the exposed main conductor 4a and branch conductor 5a. The resin mold portion 6 is formed so as to straddle the exposed coating layer 4b near the exposed main line conductor 4a and the exposed coating layer 5b near the exposed branch line conductor 5a. The resin mold portion 6 may be made of, for example, polyvinyl chloride, a halogen-free resin, an insulating material having excellent flame retardancy, or the like. The material and thickness of the resin mold portion 6 can be appropriately selected in consideration of a desired insulation strength.

  In addition, a compound (not shown) may be provided on the first inner peripheral surface 21i of the first grip 21 of the connecting member 20 and on the second inner peripheral surface 22i of the second grip 22. Abrasive grains are contained in the compound. When the connecting member 20 is made of aluminum or an aluminum alloy, an oxide layer may be formed on the surface of the connecting member 20. By providing a compound on each of the inner peripheral surfaces 21i and 22i of the connecting member 20, the compound is interposed in the connection region between the connecting member 20 and the main conductor 4a and the connecting region between the connecting member 20 and the rod-shaped member 10. When compression bonding is performed, the oxide layer that can be formed on the surfaces of the inner peripheral surfaces 21i and 22i can be broken by abrasive grains in the compound to generate a new surface, and each member can be connected to each other by the constituent metals. After the compression connection, a gap is hardly formed due to the interposition of the compound, and an oxide layer is hardly formed. Therefore, it is easy to electrically connect each member satisfactorily.

  The main conductor 4a and the branch line conductor 5a are exposed, the main member 4a and the branch line conductor 5a are gripped by the connecting member 1, the rod member 10 is connected to the connecting member 20, the members are compressed, and the resin mold portion 6 is connected. The shaping may be performed for each branch of the branch cable 5 with respect to the trunk cable 4.

≪Effect≫
In the connection member 1 according to the embodiment, the rod-shaped member 10 for gripping the branch line conductor 5a and the connection member 20 for gripping the main conductor 4a are configured as independent members, and a connection region between the rod-shaped member 10 and the connection member 20 is provided. Is set to a certain size. Therefore, the trunk conductor 4a having various sizes and the branch conductor 5a can be easily connected with a simple configuration. Mains conductors 4a has, for example, a wide size such 100 to 500 mm ^2, the branch line conductor 5a has a wide size, eg 14~100mm ^2. Therefore, in response to the trunk conductors 4a and the branch line conductors 5a having various sizes, the trunk line gripping portions for gripping the main line conductors 4a are developed into ten types of sizes, and the branch line gripping portions gripping the branch line conductors 5a. Is developed into 10 different sizes. In the case of a connecting member in which the main line grip portion and the branch line grip portion are integrally formed, 100 types of sizes corresponding to the number of combinations of the main line grip portion of 10 types and the branch line grip portions of 10 types. Need to be prepared. On the other hand, in the case of the connection member 1 in which the main line gripping portion (the connecting member 20) and the branch line gripping portion (the rod-shaped member 10) are independently formed, the main line gripping portion (the connecting member) having 10 types of sizes and the 10 types And a branch line gripping portion (rod-shaped member) having a size of may be prepared, and a total of 20 types of members may be prepared. That is, the number of connection members 1 itself can be significantly reduced. Further, the size of the main conductor 4a and the branch conductor 5a can be easily expanded.

  In particular, the connecting member 1 according to the embodiment specifies the connecting member 20, the first region 11 of the rod-shaped member 10, and each metal type of the second region 12, so that the main conductor 4a is made of aluminum or an aluminum alloy, The branch line conductor 5a can be suitably used for the cable 3 with a branch made of copper or a copper alloy. The connection member 1 according to the first embodiment is also used when the main conductor 4a and the branch conductor 5a are the same kind of metal, for example, when both the main conductor 4a and the branch conductor 5a are copper or a copper alloy. it can. In that case, the connecting member 1 is made of the same metal as the conductors 4a and 5a for both the rod-shaped member 10 and the connecting member 20.

≪Modification 1≫
Modification 1 of the above embodiment will be described with reference to FIG. FIG. 5 illustrates the rod-shaped member 10, and for other members, refer to FIGS. In the above-described embodiment, when the branch line conductor 5a is made of copper or a copper alloy and the main conductor 4a is made of aluminum or an aluminum alloy, the first region 11 is made of copper or a copper alloy, and the second region 12 is made of aluminum or aluminum. The form made of the alloy has been described. In addition, even when the branch conductor 5a is made of copper or a copper alloy and the main conductor 4a is made of aluminum or an aluminum alloy, the inner peripheral surface of the storage hole 111 in the first region 11 is made of copper or a copper alloy. If so, other regions of the first region 11 may be made of aluminum or an aluminum alloy like the second region 12. For example, as shown in FIG. 5, a copper-based layer 111c made of copper or a copper alloy may be provided on the inner peripheral surface of the storage hole 111. This copper-based layer 111c can be formed by plating or vapor deposition. Since the inner peripheral surface of the storage hole 111 is made of copper or a copper alloy, it is possible to suppress the occurrence of electrolytic corrosion with the branch line conductor 5a.

≪Modification 2≫
Modification 2 of the above embodiment will be described with reference to FIG. FIG. 6 illustrates the rod-shaped member 10, and for other members, refer to FIGS. In the above-described embodiment, the embodiment in which the bar-shaped member 10 includes the third region 13 in which the protrusion 131 is formed, and the protrusion 131 is integrally formed with the bar-shaped member 10 has been described. In addition, the protrusion 131 may be formed separately from the rod-shaped member 10. For example, the bar-shaped member 10 does not include the third region 13 in which the protruding portion 131 is formed, and is provided at an end of the second region 12 opposite to the first region 11 in a direction crossing the longitudinal direction of the bar-shaped member 10. A through hole 12h can be provided. A bolt 12b is inserted through the through hole 12h, and a nut 12n is attached to an end of the bolt 12b. When the nut 12n is attached to the bolt 12b that has penetrated the through-hole 12h, the head of the bolt 12b and the nut 12n are located outside the second region 12, and the direction intersecting the longitudinal direction of the rod-shaped member 10. It has the same function as the protruding portion 131 protruding from

  Further, instead of the bolt 12b and the nut 12n, a pin having a length longer than the outer diameter of the second region 12 can be used. The pin has an outer diameter such that the pin is fixed while penetrating the through hole 12h. For example, when the pin is press-fitted into the through-hole 12h, both ends of the pin are located outside the second region 12, similar to the protruding portion 131 protruding in a direction intersecting the longitudinal direction of the rod-shaped member 10. It has the function of

  In addition, the rod-shaped member 10 does not include the third region 13 in which the protrusion 131 is formed, and has a threaded blind hole (not shown) in an end surface of the second region 12 opposite to the first region 11. Can be prepared. It is preferable that the blind hole is formed concentrically with the rod-shaped member 10. A bolt having a head with an outer diameter larger than the outer diameter of the rod-shaped member 10 is attached to the blind hole. When the bolt is attached to the blind hole, the head of the bolt is located outside the second region 12 and has the same function as the protruding portion 131 protruding in a direction intersecting the longitudinal direction of the rod-shaped member 10. Have.

  By forming the projecting portion 131 separately from the rod-shaped member 10, the external shape of the rod-shaped member 10 can be made simple, so that the moldability of the rod-shaped member 10 can be improved. In addition, since the bar-shaped member 10 itself does not have the protruding portion 131, the bar-shaped member 10 can be inserted into the second opening 22o of the connecting member 20, and after the branch line conductor 5a is compression-connected to the first region 11, the rod-shaped member 10 can be inserted. The member 10 and the connecting member 20 can be compression-connected. Since the above-described bolt 12b, nut 12n, and pin often come into contact with the connecting member 20, it is preferable that the second region 12 be made of the same kind of metal.

≪Modification 3≫
Modification 3 of the above embodiment will be described with reference to FIG. In the above-described embodiment, the embodiment in which the protrusion 131 provided in the third region 13 of the rod-shaped member 10 is provided so as to be in contact with the end surface of the connecting member 20 has been described. In addition, as shown in FIG. 7, the protrusion 131 may be in non-contact with the end surface of the connecting member 20. Even if the protrusion 131 is not in contact with the end face of the connecting member 20, when the rod-shaped member 10 is shifted toward the first region 11 (side to which the branch line conductor 5a is connected) with respect to the connecting member 20, By being hooked on the connecting member 20, the rod-shaped member 10 can be prevented from falling off from the connecting member 20.

DESCRIPTION OF SYMBOLS 1 Connection member 10 Bar-shaped member 11 1st area 111 Storage hole 111c Copper-based layer 12 2nd area 12h Through hole 12b Bolt 12n Nut 13 Third area 131 Projection 20 Connection member 21 First grip 21o First opening 21i First One inner peripheral surface 21s First slit 22 Second gripping portion 22o Second opening 22i Second inner peripheral surface 22s Second slit 2 Branch connection structure 2e End connection structure 3 Cable with branch 4 Trunk cable 4a Trunk conductor 4b Coating layer Reference Signs List 5 branch line cable 5a branch line conductor 5b coating layer 6 resin molded part 7 end cable 8 cable grip 9a electric room 9b electric equipment

Claims (19)

A connecting member that electrically connects a trunk cable having a trunk conductor and a branch cable having a branch conductor,
A bar-shaped member having one end and the other end, and gripping the branch line conductor,
A connecting member that grips the rod-shaped member and the main conductor,
The rod-shaped member,
A first region having a storage hole into which the tip of the branch line conductor is inserted at one end,
And a second region located on the other end side of the first region and held by the coupling member.   The connection member according to claim 1, wherein the first region and the second region are made of dissimilar metals, and are joined at end faces. The first region is made of copper or a copper alloy,
The connecting member according to claim 2, wherein the second region is made of aluminum or an aluminum alloy.   The connection member according to claim 1, wherein an inner peripheral surface of the storage hole is made of copper or a copper alloy.   The connecting member according to any one of claims 1 to 4, wherein the connecting member grips the second region without gripping the first region. The rod-shaped member includes a third region on the opposite side to the first region across the second region,
The connection member according to any one of claims 1 to 5, wherein the third region includes a protrusion that protrudes in a direction that intersects a longitudinal direction of the rod-shaped member.   The connection member according to claim 6, wherein the protrusion contacts an end face of the connection member.   The connecting member according to any one of claims 1 to 7, wherein the connecting member is made of aluminum or an aluminum alloy. The connecting member,
A first gripper for gripping the main conductor,
The connection member according to any one of claims 1 to 8, further comprising: a second grip portion configured to grip the rod-shaped member. The first gripper,
A first opening connecting one end and the other end of the connection member,
A first slit formed along the axial direction of the first opening and capable of accommodating the main conductor in the first opening,
The connection member according to claim 9, wherein the first opening includes a first inner peripheral surface having an inner peripheral length corresponding to an outer peripheral length of the trunk conductor. The second grip portion includes a second opening that connects one end and the other end of the connection member,
The connection member according to claim 9, wherein the second opening includes a second inner peripheral surface having an inner peripheral length corresponding to an outer peripheral length of the rod-shaped member. The main conductor is made of aluminum or aluminum alloy,
The connection member according to any one of claims 1 to 11, wherein the branch line conductor is made of copper or a copper alloy. A trunk cable having a trunk conductor made of aluminum or an aluminum alloy,
A branch line cable having a branch line conductor made of copper or a copper alloy,
A branch connection structure for a cable including a connecting member that electrically connects the trunk cable and the branch cable,
The cable connection structure according to claim 1, wherein the connection member is the connection member according to claim 1.   14. The branch connection structure for a cable according to claim 13, further comprising: a resin mold portion that covers the connection member and the trunk line conductor and the branch line conductor connected by the connection member.   A cable with a branch, comprising the cable branch connection structure according to claim 13. Preparing a trunk cable having a trunk conductor;
Providing a branch line cable having a branch line conductor;
Preparing a connecting member according to any one of claims 1 to 12,
A method of manufacturing a branch connection structure for a cable, comprising: a connection step of electrically connecting the trunk cable and the branch cable via the connection member. The connecting step includes:
A step of compressing the first region so that a tip end of the branch line conductor is gripped in the storage hole;
17. The method of manufacturing a branch connection structure for a cable according to claim 16, further comprising: compressing the connecting member so that the second region of the rod-shaped member and the main conductor are gripped by the connecting member. A rod-shaped body made of copper or copper alloy, a first region having a storage hole into which the tip of a branch line conductor made of copper or copper alloy is inserted at one end,
A rod-shaped body made of aluminum or an aluminum alloy and having a second region gripped by a connecting member made of aluminum or an aluminum alloy together with a main conductor made of aluminum or an aluminum alloy in a rod-shaped body joined to the other end of the first region. Element. A third region is provided on the opposite side of the first region with respect to the second region,
20. The rod-shaped member according to claim 18, wherein the third region includes a protrusion protruding in a direction intersecting a longitudinal direction of the rod-shaped member.

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