JP2005129324A - Connecting cap and cable connection method using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting cap which can prevent pulling-out of a conductive sleeve from the cap main body at the time of compression of the cap main body and yet the cap main body can be fitted to an electric cable easily, and a cable connection method using it. <P>SOLUTION: The connecting cap 10 comprises a cap main body 14 which has an inner depth wall 14a of hemispherical shape at the tip side and an aperture 16 for inserting a core wire part 27a of a cable 27 at the rear edge side and a conductive sleeve 17 which is fitted at the inside of the cap main body 14 and is connected to the core wire part 27a, and has an engaging projection 15 of a ring shape for preventing pulling-out of the conductive sleeve 17 at the inner face toward the aperture 16 side of the cap main body 14a. The cap main body is formed in taper form which becomes narrower toward the tip side. A recessed part which crosses the insertion direction of the cable 27 is provided at the inner face of the conductive sleeve. A coating crimping part 14b which crimps the insulating coating part 27b of the cable 27 is provided at the aperture 16 side of the cap main body 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a connection cap that collects and protects the core portions of a plurality of electric wires and electrically connects the core portions to each other and a wire connection method using the connection cap.

  Conventionally, what is disclosed by FIG.7 and FIG.8 is known as an example of this kind of connection cap (for example, patent document 1, 2).

  A connection cap (Patent Document 1) 40 shown in FIG. 7 includes a cap body 41 composed of a concentric large-diameter portion 41a and a small-diameter portion 41b, and a conductive sleeve 43 built in the small-diameter portion 41b. Yes. The cap body 41 is formed of a heat-shrinkable synthetic resin material, has a back wall 41c closed on the front end side, and has an opening 42 for inserting the end of the electric wire 45 on the rear end side. The conductive sleeve 43 is made of a conductive material such as copper and is closely fitted in the small diameter portion 41b.

  In the connection cap 40, the ends of the two electric wires 45 are inserted into the back side from the opening 42 on the rear end side, and the core wire portion 45 a exposed by being peeled is inserted into the small diameter portion 41 b. And the outer periphery of the small diameter part 41b is pressurized with the pressurization tool which is not shown in figure, the conductive sleeve 43 is diameter-reduced with the cap main body 41, and the core wire part 45a is crimped | bonded. Furthermore, the large-diameter portion 41a of the cap body 41 is heated and contracted by a heater such as a hot gun, and the insulating coating portion 45b of the electric wire 45 is pressure-bonded in close contact with the inner surface of the large-diameter portion 41a.

  A connection cap 50 (Patent Document 2) shown in FIG. 8 is formed by integrally forming an electric wire fixing tongue piece 51 b on a cap body 51. Similar to the cap body 41 shown in the first conventional example, the cap body 51 is formed of an insulating synthetic resin material, has a back wall 51a closed on the front end side, and has an opening 52 on the rear end side. have.

A branch line 56 is branched from the wire harness main line 55, and the exposed core wire part 56a is removed by removing the insulation coating part 56b of the branch line 56, and is welded by a method such as ultrasonic welding to form a splice part 56c. It has become. The splice portion 56c is inserted from the opening 52 of the cap body 51, the insulating coating portion 56b is overlaid on the tongue piece 51b for fixing the electric wire, and the tape 57 is wound around the outer periphery so that the connection cap 50 is attached. ing. Then, the connection cap 50 is bent along the wire harness main line 55, wound with a tape 57 together with the main line 55, and held.
Japanese Utility Model Publication No. 5-50662 (page 4-5, Fig. 2) JP-A-9-137881 (page 3-4, FIG. 8)

  However, the conventional connection caps 40 and 50 have the following problems to be solved. In the first conventional example, the cap body 41 and the conductive sleeve 43 are uniformly pressed from the circumferential direction and are not compression-molded, so the core wire portion 45a of the electric wire 45 is not uniformly crushed, There is a concern that contact resistance will increase and stable electrical performance will not be obtained. Further, if the applied pressure is increased too much, there is a concern that the cap body 41 made of a synthetic resin material may crack. In addition, when the cap body 41 is gradually pressurized from the front end side to reduce the diameter, the conductive sleeve 43 may be pushed out to the rear end side of the cap body 41 and come out of the opening 42.

  In the second conventional example, the core wire portion 56a of the branch line 56 is welded by a method such as ultrasonic welding, and the contact area is increased, the contact resistance is reduced, and the electrical performance is enhanced. There is a problem that it is necessary to provide a separate welding apparatus, resulting in a high cost, and a problem that the welding work is troublesome.

  In addition, the tape winding operation for fixing the connection cap 50 to the branch line 56 and the tape winding operation for holding the connection cap 50 on the wire harness main line 55 are required, and this requires time. There's a problem. Further, in order to securely seal the connection cap 50 and the splice part 56c, it is necessary to fill the inside of the connection cap 50 with a sealing agent such as silicon or hot melt, which causes a problem of poor workability. Even if the sealing agent is filled, there is a concern that water or the like may enter the inside due to deterioration of the tape 57 or durability.

  In view of the above points, the present invention can ensure high insulation performance and obtain stable electrical performance. In addition, when compressing the cap body, the core wire connecting member (conductive sleeve) An object of the present invention is to provide a connection cap that can prevent the cap body from coming out of the cap body, and can easily attach the cap body to an electric wire, and a wire connection method using the connection cap.

  In order to achieve the above-mentioned object, the invention according to claim 1 is the core wire connection for connecting to the electric wire inserted from the opening inside the insulating cap body having the back wall on one side and the opening on the other side. In the connection cap in which the member is housed, a locking portion for preventing the core wire connection member from coming off is provided on the inner surface of the cap body.

  According to the above configuration, after inserting a plurality of wire ends from the opening of the insulating cap body into the back side and inserting the core wire part from which the insulating coating part has been removed into the core wire connecting member and accommodating it in the cap body By compressing the cap body, the core wire portion is insulated and protected by the cap body, and the core wire portion and the core wire connecting member are electrically connected. When the cap body is compressed by the applied pressure, the end portion of the core wire connecting member abuts on the engaging portion, and the core wire connecting member is prevented from being pushed out to the opening side of the cap body. In addition, the locking part is buried in the step between the core wire connecting member and the wire covering part, the electric wire housing space in the cap body is sealed, and entry of water and dust from the outside is prevented, sealing performance Will improve.

  According to a second aspect of the present invention, in the connection cap according to the first aspect, the cap main body and the core wire connecting member are formed in a tapered shape that narrows toward the tip.

  According to the said structure, the taper-shaped connection cap in which the electric wire edge part was accommodated can be inserted with low insertion force with respect to the cylindrical pressurization tool which has a taper-shaped approach part, and a core wire connection member becomes The force pushed to the opening side of the cap body is reduced. Moreover, the opening of the cap body opens in a trumpet shape, and the core portion can be smoothly inserted without being caught on the cap body.

  According to a third aspect of the present invention, in the connection cap according to the first or second aspect, the inner surface of the core wire connecting member is provided with a recess that intersects the insertion direction of the electric wire.

  According to the said structure, when a cap main body is compressed and a core wire part is crimped | bonded, the oxide film of a core wire part is destroyed by the edge of a recessed part, and while a contact resistance reduces, a contact area increases. Further, the edge of the recess bites into the core wire portion in a wedge shape, and the crimping strength is improved.

  According to a fourth aspect of the present invention, in the connection cap according to any one of the first to third aspects, an extension portion for crimping the insulating coating portion of the electric wire is provided on the opening side of the cap body. It is characterized by that.

  According to the said structure, when a cap main body is compressed, the insulation coating part and extension part of an electric wire will closely_contact | adhere without gap, and a sealing performance will improve.

  Further, the invention according to claim 5 inserts the electric wire into the connection cap according to any one of claims 1 to 4, inserts the core wire portion into the core wire connection member, and connects the core wire portion to the cap. After being accommodated in the main body, the periphery of the cap main body is uniformly compressed by a rotary aging device, the core wire portion and the core wire connecting member are pressure-bonded, and the connection cap is attached to the electric wire.

  According to the said structure, since a cap main body and a core wire connection member are compressed simultaneously, crimping | compression-bonding of a core wire part and attachment of a cap main body can be performed in one process. In addition, since the cap body is uniformly compressed, the core wire connecting member is also uniformly compressed, and the electrical resistance between the core wire portions does not vary. No local stress concentration occurs in the cap body, and cracking of the cap body is prevented. Furthermore, when the cap body is compressed, the end portion of the core wire connecting member comes into contact with the locking portion, and the core wire connecting member is prevented from being pulled out, so that the connection cap can be securely attached.

  According to a sixth aspect of the present invention, in the electric wire connection method using the connection cap according to the fifth aspect, the connection cap is gradually inserted from the front end side between the opposing dies of the rotary aging device. It is characterized by compressing.

  According to the said structure, it can prevent that a big pressurizing force acts on a cap main body at once.

  As described above, according to the first aspect of the present invention, since the locking portion for preventing the core wire connecting member from coming off projects from the inner surface of the cap body, the cap body is compressed by the applied pressure. Further, the end portion of the core wire connecting member abuts on the locking portion, thereby preventing the core wire connecting member from being pushed out to the opening side of the cap body. Therefore, the core wire connecting member is prevented from coming off, and the connection cap can be securely attached. Further, it is possible to prevent the yield from being generated in the connection cap attaching process, and the productivity is improved.

  According to the invention described in claim 2, it is possible to insert the tapered connection cap in which the end portion of the electric wire is accommodated with a low insertion force into the cylindrical pressure tool having the tapered approach portion. The force with which the core wire connecting member is pushed out to the opening side of the cap body is reduced. Further, the opening of the cap body opens in a trumpet shape, and the core portion can be smoothly inserted without being caught on the cap body. Therefore, the effect of claim 1 is promoted. Moreover, the electric wire size applicable to a connection cap is expanded, and it becomes possible to reduce the kind of connection cap.

  According to the invention described in claim 3, since the concave portion is provided on the inner surface of the core wire connecting member, the inner surface of the core wire connecting member becomes an uneven surface, and when the core wire portion is crimped, an oxide film on the core wire portion. Is broken by the edge of the recess, the contact resistance is reduced and the contact area is increased. Therefore, the electrical performance of the core wire portion is improved, and the crimping strength is improved by the biting of the edge of the concave portion, so that the electric wire is prevented from being pulled out due to an inadvertent tensile force.

  According to the fourth aspect of the present invention, when the cap body is compressed, the insulating coating portion and the extension portion of the electric wire are brought into close contact with each other, and the sealing performance of the connection cap is improved. Therefore, infiltration of water and dust into the cap body is prevented, and the reliability of electrical connection of the core wire portion is improved.

  According to the invention described in claim 5, since the cap main body and the core wire connecting member are compressed at the same time, the crimping of the core wire portion and the attachment of the cap main body can be performed in one step. In addition, since the cap body is uniformly compressed, the core wire connecting member is also uniformly compressed, and the electrical resistance between the core wire portions does not vary. Therefore, the mounting workability of the connection cap is improved and stable electrical performance can be obtained.

  According to the sixth aspect of the present invention, it is possible to prevent a large pressing force from acting on the cap body at one time. Therefore, in addition to the effect of the sixth aspect, it is possible to prevent damage such as cracks from occurring when the cap body is compressed.

  Specific examples of embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 3 show a first embodiment of a connection cap according to the present invention.
The connection cap insulates and protects the concentrated core wire portions of the electric wires drawn from the circuit elements constituting the electric circuit and the electric wires connected to the battery, etc., and electrically connects the core wire portions to each other. It is. Wires to be connected are, for example, wires drawn from a plurality of actuators such as motors and solenoids, branch wires branched from the trunk of the wire harness, and wires connected to electronic components housed in an electrical connection box Etc. The number of electric wires to be connected is increased or decreased according to the circuit form. In the present embodiment, seven electric wires 27 are connected by the connection cap 10.

  In each electric wire 27 to be connected, the insulating coating portion 27b is removed at the end portion of the electric wire 27, and the core wire portion 27a is exposed to a desired length. The exposed length of the core wire portion 27 a is formed to be slightly shorter than the depth of the connection cap 10. This is because the connection cap 10 includes a cover crimping part (extension part) 14b for crimping the insulating coating part 27b of the electric wire 27 on the opening 16 side. The core wire portions 27a of the electric wires 27 are aligned in the same direction, are appropriately twisted so that the strands 27c are not scattered, and are inserted from the opening 16 side of the connection cap 10 to the back side. Yes.

  The connection cap 10 of the present embodiment has a cap body 14 having a hemispherical back wall 14a closed on the front end side and an opening 16 for inserting the core portion 27a of the electric wire 27 on the rear end side, and a cap. A conductive sleeve (core wire connection member) 17 is provided inside the main body 14 and connected to the core wire portion 27a, and prevents the conductive sleeve 17 from coming off on the inner surface of the cap main body 14 near the opening 16 side. The first feature is that a ring-shaped locking projection (locking portion) 15 is provided.

  By providing the locking projection 15 on the inner surface of the cap body 14, even if the cap body 14 is compressed, the conductive sleeve 17 is prevented from being pushed out to the opening side of the cap body 14 and coming out, and the core portion 27a. The electrical connection between them and the attachment of the connection cap 10 can be performed reliably, and the occurrence of yield in the connection cap 10 attachment process can be prevented.

  Below, the main structural part of the connection cap 10 of this embodiment and its effect | action are demonstrated in detail. As shown in FIG. 1, the connection cap 10 includes a cap body 14 and a conductive sleeve 17. The cap body 14 is formed by an injection molding method using an insulating synthetic resin material such as polyvinyl chloride, nylon, or polyethylene as a constituent material. The front end side of the cap main body 14 is a closed end, and the back wall 14a is formed in a hemispherical shape to prevent water or the like from entering the main body 14. Since the back wall 14a is formed in a hemispherical shape, the connection cap 10 can be smoothly inserted between dies (pressing tools) 21 and 21 facing each other of the rotary aging device 20 described later. The rear end side of the cap body 14 is an open end, and the core wire portion 27a of the electric wire 27 is inserted therein.

  The inner side of the cap body 14 serves as a housing space 12 for the core wire portion 27a, and the core wire portion 27a is insulated and protected. On the inner surface of the cap body 14 on the opening 16 side, there is a flexible locking projection 15 having an inclined surface 15a on the opening 16 side and a locking surface 15c on the back wall 14a side and having a mountain-like vertical cross section. Projected. Although not shown, the cross section of the locking projection 15 has a ring shape that is continuous without a gap. The present invention is not limited to forming the locking projections 15 in a ring shape, and may be formed discontinuously by providing a gap in the circumferential direction. When the conductive sleeve 17 is inserted, the locking projection 15 is bent to allow the conductive sleeve 17 to enter the cap body 14.

  The inclined surface 15a of the locking projection 15 is a tapered inclined surface that gradually inclines from the opening 16 side toward the back side and has a small diameter, and has a tip portion extending parallel to the axial direction and extending toward the back side. The existing top surface 15b continues. The top surface 15b is followed by a locking surface 15c orthogonal to the axial direction. By providing a top surface 15b on the locking projection 15 and making the locking projection 15 thick, the locking projection 15 is prevented from being bent more than necessary while maintaining a certain degree of flexibility. By maintaining the flexibility of the locking projection 15, the conductive sleeve 17 rides on the inclined surface 15 a and is smoothly press-fitted from the opening 16 side of the cap body 14.

  The locking surface 15 c of the locking protrusion 15 is a contact surface with respect to the conductive sleeve 17, and the conductive sleeve 17 comes out of the cap body 14 when the end surface of the conductive sleeve 17 contacts the locking surface 15 c. Is prevented. That is, the connection cap 10 is gradually compressed from the front end side to the rear end side by the rotary aging device 20 and is attached to the end of the electric wire 27, and acts on the conductive sleeve 17 when the connection cap 10 is compressed. When the locking surface 15c receives the pushing force to be performed, the conductive sleeve 17 is prevented from coming out of the cap body 14.

  On the side of the opening 16 of the cap body 14 that extends in the axial direction continuously to the locking projection 15, a coating crimping part (extension part) 14 b for crimping the insulating coating part 27 b of the electric wire 27 is formed. When the cap main body 14 is compressed, the insulating coating portion 27b and the coating crimping portion 14b are in close contact with each other, improving the sealing performance of the cap main body 14 and preventing water and dust from entering the cap main body 14. It has become so.

  The conductive sleeve 17 is a cylindrical body made of a conductive metal material such as copper, and is formed so as to penetrate the core portion 27a of the electric wire 27 from one side to the other. As shown in FIG. 4A, the inner diameter of the insertion hole 18 of the conductive sleeve 17 is formed to have the same size as or larger than the outer diameter of the core wire portion 27a, and does not get caught when the core wire portion 27a is inserted. It is like that. Since the thickness of the conductive sleeve 17 is shorter than or equal to the protruding margin of the locking projection 15, the conductive sleeve 17 does not protrude from the locking projection 15, and the core portion 27 a The strand 27c does not scatter when hitting the end of the conductive sleeve 17. The conductive sleeve as the core wire connecting member is not limited to the cylindrical body, but can be a U-shaped connecting member having a pair of crimping pieces on both sides.

  The conductive sleeve 17 of the present embodiment is inserted from the opening 16 of the cap body 14 as described above, and is housed inside. Before the conductive sleeve 17 is inserted into the cap body 14, an adhesive may be applied to the inner surface of the cap body 14 so that the conductive sleeve 17 is bonded and fixed to the cap body 14. Further, the conductive sleeve 17 can be fixed by molding the cap main body 14 with a heat-shrinkable synthetic resin material and installing the conductive sleeve 17 and then heating the outer periphery of the cap main body 14 to reduce the diameter. . Further, the conductive sleeve 17 can be integrated with the cap body 14 by insert molding. In this way, by fixing the conductive sleeve 17 to the cap body 14, it is possible to prevent the conductive sleeve 17 from coming off more reliably by the synergistic effect of the fixing force and the locking force of the locking protrusion. Become.

  Next, the main components and the operation of the rotary aging device 20 will be described with reference to FIG. 2 or FIG. In FIG. 2, the state before and after the swaging process is indicated by a solid line for convenience.

  In the spindle 24 of the rotary aging device 20, a die 21 and a backer 22 are held movably while being in contact with each other. In the present embodiment, a pair of opposing dies 21 and 21 are disposed. At the center of the spindle 24, the connection cap 10 as a processing material is arranged so as to be sandwiched by the inner surface 21a of the die 21. Thus, by arranging the connection cap 10 at the rotation center of the spindle 24, the outer periphery of the connection cap 10 can be hit uniformly over the entire circumference.

  As shown in FIG. 2, a tapered approach portion 21b is formed at the rear end side end portion of the die 21 so that the connection cap 10 can be smoothly inserted between the opposing dies 21 and 21. It has become.

  The backer 22 disposed on the outer side in the radial direction of the die 21 is separate from the die 21, but turns in cooperation with the die 21 and can move in the radial direction (center direction). The turning is performed by rotating the spindle 24 with a motor (not shown). The movement in the radial direction is performed by rotational contact between the backer 22 and the roller 23.

  The outer peripheral surface of the backer 22 is a cam surface 22a. The cam surface 22a is not formed with a constant radius of curvature, but the central portion in the width direction protrudes outward in the radial direction. For this reason, when the backer 22 is brought into rotational contact with the roller 23, the backer 22 is pushed in the radial direction by the roller 23 by an amount equal to the protruding amount of the central portion, and the die 21 is moved in the radial direction.

  Between the outer periphery of the spindle 24 and the outer ring 25, the spherical rollers 23 are arranged at equal intervals and are rotatably supported. The number of rollers 23 is six, but may be eight. As the number of rollers 23 increases, the number of hits per one rotation of the spindle increases, and the processing rate of the connection cap 10 improves.

  The above rotary aging device 20 operates as follows. By rotating the spindle 24, the die 21 and the backer 22 are turned, and the roller 23 is rotated. Since the backer 22 is located on the outer side in the radial direction of the die 21, the revolving backer 22 and the roller 23 come into contact with each other, and the cam surface 22 a of the backer 22 rides on the roller 23, so that the inner surface of the backer 22 becomes the die 21. Is pushed inward in the radial direction, and the die 21 strikes the outer periphery of the connection cap 10.

  When the backer 22 and the roller 23 are in a non-contact state, the backer 22 slightly protrudes radially outward due to centrifugal force, the die 21 is separated from the connection cap 10, and the hitting by the die 21 is temporarily stopped. Again, the backer 22 and the roller 23 come into contact with each other and the above operation is repeated.

  The attachment of the connection cap 10 using the rotary aging device 20 is performed by inserting the connection cap 10 from the front end side between the opposing dies 21 and 21 after the core wire portion 27a is accommodated in the cap main body 14, and the cap main body. The cap body 14 and the conductive sleeve 17 are compression-molded by hitting uniformly around the periphery of the cap 14.

  According to such an attachment method, the cap body 14 and the conductive sleeve 17 are compressed at the same time, so that the crimping of the core wire portion 27a and the attachment of the cap body 14 can be performed in one step. Improves.

  Further, as shown in FIG. 4B, when the cap body 14 is uniformly compressed, the conductive sleeve 17 is reduced in diameter, and the strand 27c and the conductive sleeve 17 formed in a honeycomb shape are formed. Stable electrical performance can be obtained without inconsistent electrical resistance. Since a large pressurizing force does not act on the cap body 14 at a time, it is possible to prevent the cap body 14 from being damaged such as cracking. Furthermore, compared with thermocompression bonding or ultrasonic welding, the apparatus cost is also low and processing can be performed at low cost.

  FIG. 5 shows a second embodiment of the connection cap according to the present invention.

  The connection cap 30 is formed in a tapered shape in which the cap main body 31 is gradually narrowed toward the tip. Therefore, the opening 16 of the cap body 31 has a trumpet shape. The conductive sleeve 32 housed in the cap body 31 is formed in a tapered shape along the inner surface of the cap body 31. Since other configurations of the present embodiment are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  According to the second embodiment, the connection cap 30 can be inserted with a low insertion force into the cylindrical die 21 having the tapered approach portion 21b shown in FIG. The force pushed out toward the opening 16 of the cap body 31 is reduced. Further, since the opening 16 of the cap body 31 opens in a trumpet shape, the core wire portion 27a can be smoothly inserted without being caught on the cap body 31, the applicable wire size is expanded, and the types of connection caps 30 are reduced. Can do.

  FIG. 6 shows a modification of the conductive sleeve applied to the first and second embodiments. (A) is a spiral groove (concave portion) 35 a provided continuously on the inner surface of the conductive sleeve 35, and (b) is intermittently provided with an orthogonal groove (concave portion) 36 a orthogonal to the insertion direction of the electric wire 27. It is provided. These grooves 35a and 36a are formed by cutting or pressing. Since other configurations of the conductive sleeves 35 and 36 are the same as those of the above-described embodiment, the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  According to such a modification, the inner surfaces of the conductive sleeves 35 and 36 are uneven, and when the core wire portion 27a is crimped, the oxide film of the core wire portion 27a is broken by the edges of the grooves 35a and 36a, and the contact resistance is increased. Is reduced, the contact area is increased, and the electrical performance is improved. Further, the edges of the grooves 35a and 36a bite into the core portion 27a in a wedge shape, so that the crimping strength is improved and the unintentional pulling force prevents the electric wire 27 from being pulled out.

  The inner surfaces of the conductive sleeves 17, 32, 35, and 36 can be subjected to a surface treatment such as tin plating, and the electrical connectivity can be improved by reducing the contact resistance.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

It is sectional drawing which shows 1st Embodiment of the connection cap which concerns on this invention. It is sectional drawing which shows the state before and behind the swaging process of the connection cap of FIG. 1 in which the core wire part was accommodated. It is a front view of the principal part of the rotary aging device which compression-molds the outer periphery of the connection cap shown in FIG. (A) is sectional drawing cut | disconnected along the AA line of FIG. 2, (b) is sectional drawing similarly cut | disconnected along the A'-A 'line of FIG. It is sectional drawing which shows 2nd Embodiment of the connection cap which concerns on this invention. FIG. 1 or FIG. 5 shows a modification of the conductive sleeve, wherein (a) is a sectional view in which a spiral groove is formed on the inner surface of the conductive sleeve, and (b) is an orthogonal groove on the inner surface of the conductive sleeve. It is sectional drawing formed. It is sectional drawing by which an example of the conventional connection cap was shown. Another example of a conventional connection cap is shown, (a) is an exploded perspective view showing a splice part and a connection cap, and (b) is a side view showing a state in which the splice part is insulated and protected by the connection cap.

Explanation of symbols

10, 30 Connection cap 14, 31 Cap body 14a, 31a Back wall 14b, 31b Cover pressure bonding part (extension part)
15 Locking protrusion (locking part)
17, 32, 35, 36 Conductive sleeve (core wire connecting member)
20 Rotating Aging Equipment 21 Dice (Pressurizing Tool)
27 Electric wire 27a Core wire part 27b Insulation coating part 35a Spiral groove (concave part)
36a Right angle groove (recess)

Claims (6)

On the inside of the insulating cap body having an inner wall on one side and an opening on the other side, a connection cap in which a core wire connecting member connected to an electric wire inserted from the opening is installed,
A connection cap, wherein a locking portion for preventing the core wire connection member from coming off is provided on an inner surface of the cap body.   The connection cap according to claim 1, wherein the cap main body and the core wire connecting member are formed in a tapered shape that narrows toward a tip.   The connection cap according to claim 1, wherein a concave portion that intersects an insertion direction of the electric wire is provided on an inner surface of the core wire connection member.   The connection cap according to any one of claims 1 to 3, wherein an extension part for crimping the insulating coating part of the electric wire is provided on the opening side of the cap body.   A rotary aging device after inserting the said electric wire in the connection cap of any one of Claims 1-4, making the said core wire part penetrate the said core wire connection member, and accommodating this core wire part in the said cap main body. A wire connection method using a connection cap, wherein the periphery of the cap body is uniformly compressed by pressing the core wire portion and the core wire connection member, and the connection cap is attached to the wire.   6. The electric wire connection method using a connection cap according to claim 5, wherein the connection cap is compressed while being gradually inserted from the tip side between dies facing each other of the rotary aging device.

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