JP2005251400A - Cap for electric wire terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a foamable seal material from leaking out from a cap body due to the expansion pressure of the seal material. <P>SOLUTION: A cap 1 is adopted for a wire terminal including a locking part 5 to the joint 4 of an electric wire 3 inside of the cap body 2, and a resin receiving part 7 for receiving the pressure of the seal material 6 in contact with the electric wire in the cap body. The resin receiving part 7 is made flexible, and inclined toward the locking part 5 side. The tip of the resin receiving part 7 is made flexed by the pressure of the seal material 6, and is made to stick to the electric wire. A plurality of resin receiving parts 7 are provided in parallel. The protruding lengths L of the plurality of the resin receiving parts 7 are differentiated. The cap body 2 is divided, and made to unite with lock means 11, 12. The resin receiving part 7 is divided in the same plane as the divided surface 10 of the cap body 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric wire terminal cap that accommodates a joint portion of an electric wire and a foaming sealing material inside to achieve waterproofing and insulation of the joint portion.

  8 to 9 show a conventional wire terminal cap described in Patent Literature 1. FIG.

  The wire terminal cap 51 is composed of a substantially bullet-shaped cylindrical cap body 58 made of synthetic resin and a spatula-shaped wire fixing portion 55 protruding in the axial direction from the base end of the cap body 58. . The cap body 58 has a bottom 58a having a semicircular longitudinal section, and has an opening 57 only on one side. As the material of the cap 51, various materials such as polyvinyl chloride, polyethylene, and polypropylene are used.

  As shown in FIG. 9, the sealing material 52 is injected into the cap, the joint portion 54 of the electric wire 53 is inserted into the cap from above, the lead-out portion of the electric wire 53 is fixed to the fixing portion 55 with a tape 56, and the sealing material 52 is It is solidified by being left alone, and the gap between the joint portion 54 and each electric wire is sealed with a sealing material 52.

  The joint portion 54 is formed by peeling off the insulation coating of the terminal portions of the plurality of electric wires 53, exposing the core wire (conductor portion), and integrating (connecting) by thermocompression bonding or the like. The joint portion 54 is for supplying a current of the same potential to each electric wire 53 and supplying a current to an electrical component or an auxiliary machine connected thereto, or supplying a common ground current. For example, it is formed as a part of a wire harness of an automobile.

  As the sealing material 52, various materials such as urethane foam, hot melt material, and various elastomers are used. The sealing material 52 has fluidity at the time of injection and has a property of solidifying upon standing. In order to solidify (harden) the sealing material 52 quickly, a hardening material is also mixed in the sealing material.

  Japanese Patent Application Laid-Open No. H10-228561 describes that an annular portion for holding an electric wire is provided inside the cap 51 instead of the spatula-shaped electric wire fixing portion 55 of the cap 51. According to this cap, tape winding is unnecessary and the electric wire 53 is positioned at the center of the cap.

  FIG. 10 shows a conventional wire terminal cap described in Patent Document 2. As shown in FIG.

  The wire terminal cap 61 is made of a synthetic resin, and includes a bottomed cap body 62 and a flexible locking lance 63 disposed in the cap body. The flexible locking lance 63 is integrated with the opening end 64 of the cap body 62 via a thin hinge 65, and is folded back and accommodated in the cap body when the cap 61 is used. This structure is a measure for preventing the flexible locking lance 63 from being die-cut at the time of resin molding (making the die-cutting easy).

  The joint portion 66 is formed by peeling the insulation coating of the terminal portions of the plurality of electric wires 67 to expose the core wires, and crimping (clamping) each core wire with a conductive metal sleeve.

  FIG. 11 shows a conventional wire terminal cap described in Patent Document 3. As shown in FIG.

  The wire terminal cap 71 is made of a synthetic resin or rubber, and has a cap body 72 formed in a bottomed cylindrical shape, and an annular flexible wire protruding perpendicularly to the inner peripheral surface of the cap body 72. It is comprised with the receiving part 73. FIG.

The wire receiving portions 73 are formed in a plurality of strips in parallel in the axial direction of the cap main body 72, and the inner diameter of the wire receiving portion 73 closer to the bottom is set smaller. Can be retained. The sealing material is not injected into the cap of this example, and the cutting end of the electric wire 75 is inserted and held in the cap, and is protected from external dust, water droplets, etc. when the electric wire 74 is stored.
Japanese Patent Laid-Open No. 10-243539 (pages 3 to 4, FIGS. 1 to 5) JP-A-8-22847 (pages 3-4, FIG. 1) Japanese Patent Laid-Open No. 10-233134 (second page, FIG. 3)

  However, in the conventional wire terminal cap, when the sealing material is injected into the cap body (the sealing material may be injected before or after the joint portion is inserted into the cap body). ) In particular, when the sealing material is foaming material such as urethane foam, it expands while foaming in the cap body, spills out from the opening of the cap body, contaminates the outer periphery of the cap, There has been a problem that the filling amount of the sealing material is reduced and the waterproofness and the insulation are lowered.

  In addition, when integrally forming a locking means such as a locking lance and a holding means such as an electric wire holding part in the cap body, especially when a synthetic resin is used as a material, the mold cannot be removed. There was also a problem that the desired internal shape could not be formed.

  In view of the above points, the present invention can easily prevent spillage (leakage) of the sealing material when the foaming sealing material is injected into the cap body, and in addition, it is synthesized as a cap material. An object of the present invention is to provide an electric wire terminal cap capable of reliably forming a required internal structure when a resin material is used.

  In order to achieve the above-mentioned object, the wire terminal cap according to claim 1 is provided inside the cap body with a locking portion for the joint portion of the wire, contacting the wire, and applying pressure of the sealing material in the cap body. And a resin receiving portion to be received.

  With the above configuration, the joint portion of the electric wire is locked by the locking portion, the electric wire is contacted by the resin receiving portion, and the resin receiving portion receives, for example, the expansion pressure (foaming pressure) in the curing process of the foamable sealing material, Prevents leakage of sealing material from the cap body opening. The resin receiving portion does not necessarily have to be formed over the entire circumference of the cap body, and even if it is provided on a part of the circumference, it is a seal with relatively low fluidity subjected to expansion pressure. It is possible to suppress expansion (leakage) of the entire sealing material by pressing a part of the material. If the resin receiving part is formed over the entire circumference of the cap body, the resin receiving part completely receives the expansion pressure of the highly fluid sealing material and reliably prevents leakage of the sealing material. It is no longer necessary to cover the opening with a lid device such as packing, and an existing lid device is not required.

  An electric wire terminal cap according to a second aspect is the electric wire terminal cap according to the first aspect, wherein the resin receiving portion has flexibility and is inclined toward the locking portion side. .

  With the above configuration, the resin receiving portion receives the expansion pressure (foaming pressure) of the sealing material and absorbs the expansion pressure while bending in the pressure direction. As a result, leakage of the sealing material is more reliably prevented.

  The wire terminal cap according to claim 3 is the wire terminal cap according to claim 2, wherein the tip of the resin receiving portion is bent by the pressure of the sealing material and is in close contact with the wire.

  With the above configuration, the resin receiving portion is strongly adhered (pressed) to the surface of the electric wire with the expansion pressure of the sealing material (using the expansion pressure), so that a seal from between the electric wire surface and the tip of the resin receiving portion is obtained. Leakage of material is reliably prevented.

  An electric wire terminal cap according to a fourth aspect is the electric wire terminal cap according to the second or third aspect, wherein a plurality of the resin receiving portions are provided in parallel.

  With the above configuration, the expansion pressure of the sealing material is received by the innermost first resin receiving portion, and the expansion pressure of the sealing material leaked from the first resin receiving portion is the adjacent second resin receiving portion. In addition, the expansion pressure of the sealing material leaked from the second resin receiving portion is received by the adjacent third resin receiving portion, and in this way, the expansion pressure of the sealing material is sequentially increased by the plurality of resin receiving portions. By receiving it, leakage of the sealing material is surely prevented.

  The wire terminal cap according to claim 5 is the wire terminal cap according to claim 4, wherein the protruding lengths of the plurality of resin receiving portions are different from each other.

  With the above-described configuration, the resin receiving portion having the optimum protruding length according to the diameter and the number of the wires comes into contact with the outer peripheral surface of the wire, and the joint portion of different types of wires can be waterproofed with one type of cap.

  An electric wire terminal cap according to a sixth aspect is characterized in that, in the electric wire terminal cap according to any one of the first to fifth aspects, the cap main body is divided and united by a locking means.

  With the above configuration, by forming the cap body in a divided state, the engagement portion and the resin receiving portion inside the cap body can be easily and accurately formed with good mold release properties. Moreover, in the state which divided | segmented the cap main body, a sealing material can be inject | poured in a cap main body, or the joint part of an electric wire can be mounted | worn.

  An electric wire terminal cap according to a seventh aspect is the electric wire terminal cap according to the sixth aspect, wherein the resin receiving portion is divided on the same plane as the division surface of the cap body.

  With the above configuration, the resin receiving portions of the divided cap main bodies closely contact each other when the cap main bodies are combined, and the expansion pressure of the sealing material is reliably received without leaking. In addition, the shape of each divided cap including the resin receiving portion is symmetrical, and the shape of the molding die is simplified.

  According to the first aspect of the present invention, the resin receiving portion receives, for example, the expansion pressure in the curing process of the foamable sealing material and prevents the sealing material from leaking out from the cap body, so that the outer periphery of the cap can be soiled. In addition, the commercial value is increased, and the amount of the sealing material in the cap is reduced, so that the waterproof property and the insulation property are reliably prevented from being deteriorated, and the waterproof property and the insulation property are ensured satisfactorily. Moreover, since it is not necessary to cover the opening of the cap body with a lid device such as packing, a large-scale device is not required, and the waterproofing process is simplified and the cost is reduced.

  According to the invention described in claim 2, since the resin receiving portion absorbs the expansion pressure while being bent in the expansion direction of the sealing material, the leakage of the sealing material is more reliably prevented, and the effect of the invention according to claim 1 is obtained. It is demonstrated more reliably.

  According to the invention described in claim 3, since the resin receiving portion is strongly adhered to the surface of the electric wire using the expansion pressure of the seal material, the leakage of the seal material is further reliably prevented, and the invention according to claim 1 is provided. The effect of is even more reliably exhibited.

  According to the fourth aspect of the present invention, the leakage of the sealing material can be more reliably prevented by receiving the expansion pressure of the sealing material sequentially at the plurality of resin receiving portions. The effect of the invention according to claim 1 is more reliably exhibited.

  According to the fifth aspect of the present invention, the joint portion of different types of electric wires can be waterproofed with one type of cap, and the cost of the cap and its molding die can be reduced by the common use of the cap. .

  According to the invention described in claim 6, since the formation of the engaging portion and the resin receiving portion inside the cap body can be easily and accurately performed with good mold release properties, the productivity of the cap is improved and the cap Cost reduction is possible. Also, with the cap body divided, injecting sealing material into the cap body or attaching the joint part of the electric wire may damage the locking part or resin receiving part at the tip of the joint part. The joint portion can be easily and reliably attached.

  According to the seventh aspect of the invention, since the resin receiving portions of the divided cap main bodies are in close contact with each other when the cap main bodies are united, the leakage of the sealing material is further reliably prevented. The effect is more reliably exhibited.

  1 to 3 show an embodiment of an electric wire terminal cap according to the present invention.

  The wire terminal cap 1 is made of synthetic resin and can be divided into two in the radial direction, and in the cap body 2, a locking portion 5 for the joint portion 4 of the wire 3 and a foamable sealing material 6. A resin stopper 7 for (FIG. 2) is integrally provided.

  The cap body 2 is divided symmetrically on a plane passing through the axial center thereof, and the left and right divided caps 8 are connected to each other by a thin flexible hinge 9 so as to be opened and closed. The hinge 9 is set to a length that allows the split surfaces 10 of the split caps 8 to be in close contact with each other when the split caps 8 are united (if the hinge 9 is too long, a gap is generated in the split surface 10; Difficult).

  A flexible lock frame piece 11 is provided on the outer surface of one split cap 8 in the vicinity of the split surface 10, and a lock protrusion 12 that engages with the inside of the lock frame piece 11 is provided on the outer surface of the other split cap 8. It is provided and constitutes a locking means for both split caps 8 and 8. The lock means is not limited to these, and various forms such as a flexible lock claw and a lock recess can be applied.

  Each split cap 8 has a first half (front end side) half-shaped small-diameter portion 13, an intermediate short half-shaped inclined (tapered) portion 14, and a second half (base end-side) half-shaped large diameter portion 15. In the state where the two split caps 8 are integrally formed, the half-shaped small-diameter portion 13 constitutes a bottomed cylindrical small-diameter portion, and the half-shaped inclined portion 14 is an annular inclined (tapered) portion. The halved large diameter portion 15 forms a cylindrical large diameter portion. The bottom 16 has a semicircular cross section. The locking means 11 and 12 are arranged at two locations, a half-shaped small diameter portion 13 and a half-shaped large diameter portion 15.

  A half-shaped (semi-annular) locking wall 5 as a locking portion for the joint portion 4 of the electric wire 3 is integrally provided on the boundary inner surface between each half-shaped small diameter portion 13 and the half-shaped inclined portion 14. . Each halved locking wall 5 has a semicircular wire insertion groove 5a on the inner side, the half locking wall 5 is combined to form an annular locking wall, and both the wire insertion grooves 5a are combined. Thus, a circular electric wire insertion hole is formed. The small diameter portion of the cap body 2 serves as a housing portion for the joint portion 4 of the electric wire 3. The inner space 13a of each half-shaped small-diameter portion 13 constitutes a housing space for the joint portion 4 when combined.

  Instead of the locking wall 5, a flexible locking lance can be provided so as to protrude obliquely forward from, for example, the inclined portion 14 of the split cap body 2. When a flexible locking lance is used, the joint portion 4 of the electric wire 3 can be inserted from the rear opening 17 of the cap 1 or the sealing material 6 can be injected from the rear opening 17. The locking wall 5 and the locking lance can be easily resin-molded by making the cap 1 a split type.

  A plurality of flexible pleat-shaped resin stopper plates 7 as resin stoppers are inclined in parallel and at an angle as shown in FIG. It is provided integrally in the state. This angle is preferably 45 ° or more, for example.

  FIG. 2 shows the electric wire set state. In the free state of FIG. 1, each resin stopper plate 7 is inclined obliquely forward. In other words, each resin stopper plate 7 is not parallel to the inner surface of the large-diameter portion 15 but is crossed in an oblique direction and positioned in parallel.

  A gap (space) 18 that holds the foaming pressure (expansion pressure) of the foamable sealing material 6 is formed between the resin stopper plates 7. Each resin stopper plate 7 is formed to be sufficiently thinner than the thickness of the locking wall 5, and can be bent in the direction (backward) urged by the foaming pressure of the sealing material 6.

  It is preferable that the pitch (interval) of each resin stopper plate 7 is uniform. In this example, the number of the resin stopper plates 7 is three, but two, four or more, or even one is effective. The foaming pressure refers to a force by which the sealing material (resin material) 6 is pressed toward the opening 17 by a force for expanding bubbles in the sealing material.

  The split surface 7a of the resin stopper plate 7 of both split caps 8 is located on the same plane as the split surface 10 of the split cap body 2, and the split surfaces 7a of the resin stopper plates 7 of both split caps 8 are in close contact with each other when combined. It is supposed to be. Each resin stopper plate 7 has a semicircular electric wire contact groove 7b in the center, and the two electric wire contact grooves 7b become circular electric wire contact holes when combined. The outermost resin stopper plate 7 continues inward from the rear end of the split cap body 2.

  Since the cap 1 is of the split type, the resin stopper plate 7 can be easily punched from the wide opening on the split surface 10 side during resin molding. Even if each resin stopper plate 7 is inclined in a conical shape (cone shape), for example, the molding die of the inclined portion 14 is extracted, then the molding die of the innermost resin stopper plate 7 is extracted, and then the intermediate resin stopper Die cutting can be performed in the order of removing the molding die of the plate 7. If each of the resin stopper plates 7 is not conical (conical) but has a shape that is inclined only on both the left and right sides as shown in FIG. 2, it is possible to further facilitate die cutting (the mold is removed at a time).

  The joint portion 4 of the electric wire 3 may be constituted by welding of core wires or crimping and crimping of a conductive metal sleeve as in the conventional example, but a conductive metal cylindrical sleeve is swaged over the entire circumference. In order to reduce the diameter of the joint part 4 and the cap 1, it is preferable to compress (forge) to a uniform diameter.

  As shown in FIG. 1, with the cap 1 opened horizontally (divided in two), the electric wire 3 and its joint portion 4 are inserted into one of the divided caps 8 from the opening on the dividing surface 10 side. As shown in FIG. 2, the joint portion 4 is inserted into the front half-shaped small-diameter portion 13, and the rear end surface of the joint portion 4 abuts against the front end surface of the locking wall 5 to prevent the rearward removal of the joint portion 4. . Each electric wire 3 is inserted into the rear half-shaped large-diameter portion 15 in a state of being rounded, and the tip (inner peripheral portion) of the inclined resin stopper plate 7 is elastically applied to the outer peripheral surface of the electric wire 3. Press-contact closely.

  Next, the sealing material 6 is poured into the other or one or both of the divided caps 8, both the divided caps 8 are closed, and locked by the locking means 11 and 12. Alternatively, the sealing material 6 may be injected into the split cap 8 first, and then the electric wire 3 and the joint portion 4 may be inserted to lock both the split caps 8 closed. The sealing material 6 expands while generating (foaming) bubbles in the standing process after injection.

  As shown in FIG. 3A, each resin stopper plate 7 is inclined at an angle to the sealing material filling side (joint portion 4 side), so that the foaming pressure of the sealing material 6 (FIG. 2) is inclined. Of the resin stopper plate 7 (a large force is required to reverse the inclination of the resin stopper plate 7 in the reverse direction, that is, the backward direction, and it cannot be performed with the foaming pressure). Leakage of the sealing material 6 is reliably prevented.

  3A, when the protruding length L, that is, the inner diameter of each resin stopper plate 7 is the same, the sealing material that has passed through the innermost (front) resin stopper plate 7 by the foaming pressure is the next as indicated by an arrow 19. The sealing material that is received by the (intermediate) resin stopper plate 7 and that has passed through the intermediate resin stopper plate 7 by the foaming pressure is received by the next (outermost) resin stopper plate 7 as shown by the arrow 20, and is securely sealed. Leakage of the material 6 (FIG. 2) is prevented.

  In this example, as shown by L1> L2> L3 in FIG. 3B, the protruding length L of each resin stopper plate 7 is gradually shortened from the inner side to the outer side (the inner diameter of each resin stopper plate 7 is changed from the inner side to the outer side). Therefore, even if the diameter and the number of the electric wires 3 are different, the outer peripheral surface of the electric wire 3 is in close contact with any one of the resin retaining plates 7, and the sealing material 6 is generated by the foaming pressure by the resin retaining plate 7. (FIG. 2) is received and leakage of the sealing material 6 is prevented.

  Further, by making the lengths (inner diameters) of the resin stopper plates 7 different in this way, the resin stopper plates 7 corresponding to the electric wires 3 that gradually increase in outer diameter from the joint portion 4 to the end as shown in FIG. Are in close contact with the outer peripheral surface of the electric wire 3 with the optimum contact allowance, and the leakage of the sealing material 6 can be surely prevented.

  Although the structure corresponding to various wire diameters is described in the conventional patent document 3, the resin stopper plate 7 of this embodiment is completely different from the patent document 3 in that it is inclined to the filling side of the sealing material 6. It is a thing. The foaming pressure gradually escapes from the small gaps between the electric wires 3, but the gap is small, so that the sealing material 6 itself does not leak.

  As shown in FIG. 3C, each resin stopper plate 7 receives the foaming pressure of the sealing material 6 and bends outward (rearward) from the chain line state as shown by a solid line, but has inward (frontward) restoring force. Therefore, the tip end portion 7c of the resin stopper plate 7 is bent inward and in close contact with the outer surface of the electric wire 3 without being inverted outwardly and slightly inclined inward. 7c is strongly pressed against the electric wire surface by the foaming pressure.

  Thus, the sealing using the foaming pressure is performed, and the leakage of the sealing material 6 is surely prevented. In addition, when respond | corresponding to one type of electric wire outer diameter in FIG.3 (c), it cannot be overemphasized that the resin stop board 7 may be one piece instead of multiple pieces.

  For example, when the foamed sealing material is injected into the cap in the configuration of the conventional patent document 1, it is necessary to prevent the sealing material from leaking by blocking the opening of the cap with the packing of the cap pressing jig and receiving the foaming pressure. However, in the present embodiment, by receiving the foaming pressure of the sealing material 6 in the cap 1 with the resin stopper plate 7, conventional lid equipment such as packing becomes unnecessary.

  Conventionally, the sealing material is left and solidified with the cap opening facing upward. However, since the cap 1 of this example has the resin stopper plate 7, the direction of the cap 1 when left standing may remain horizontal. (Of course, it may be upward), but the waterproof workability is good.

  In the above embodiment, the length of each resin receiving plate 7 is set to become shorter as it approaches the opening 17, but conversely, it is set to become longer as it approaches the opening 17, It is also effective to make 7 the longest and gradually shorten the front and rear resin receiving plates 7.

  FIG. 4 shows another embodiment of the wire terminal cap according to the present invention.

  The wire terminal cap 21 is an integral type instead of a split type of the wire end cap 1 of the embodiment shown in FIGS. 1 to 3, and the material is not a hard synthetic resin but an elastomer such as a soft elastic synthetic rubber or vinyl chloride. In this case, the mold can be easily removed in one direction during molding.

  Since the other configuration is the same as that of the above-described embodiment, the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  That is, the wire terminal cap 21 includes a cap body 2 integrally including a first-half (front end side) small-diameter portion 13, an intermediate inclined (tapered) portion 14, and a second-half (base end-side) large-diameter portion 15; An annular locking wall (locking portion) 5 protruding inward at the boundary between the small diameter portion 13 and the inclined portion 14 and a plurality of annular resin stoppers protruding obliquely forward from the inner peripheral surface of the large diameter portion 15 It is comprised with the board 7. FIG.

  The locking wall 5 can be bent back and forth, and the joint portion 4 of the electric wire 3 is inserted along the inclined resin stopper plate 7 while the locking wall 5 is pushed forward at the tip of the joint portion 4 and bent. Then, the hole 5 a on the inner diameter side of the locking wall 5 is expanded to allow the joint portion 4 to enter the small diameter portion 13. Note that the mold is removed by the opposite operation.

  Since the locking wall 5 is flexible, it is possible to insert a different type of the outer diameter of the joint portion 4, and since the resin stopper plate 7 is flexible, it is possible to insert a different wire diameter. In this way, one type of cap 21 can correspond to the wire terminal portions having different diameters.

  The joint portion 4 is locked by an annular locking wall 5, the electric wire 3 is brought into close contact with an inclined resin stopper plate 7, and the sealing material 6 pressed by the foaming pressure is received by the resin stopper plate 7, and the sealing material 6 leakage is prevented. Each resin stopper plate 7 gradually decreases in length as it goes toward the opening 17 corresponding to various wire diameters (its inner diameter increases). The protruding length of the resin stopper plate 7 may be gradually increased (the inner diameter is decreased) as it goes toward the opening 17.

  It is preferable to inject the sealing material 6 into the cap 21 before inserting the joint portion 4 in order to increase the wraparound of the sealing material 6. The joint portion 4 is preferably a swaged conductive sleeve having a uniform outer diameter from the viewpoint of insertability and compactness. In addition, since the operational effects and the like of the resin stopper plate 7 are the same as in the previous example, the description thereof is omitted.

  5 to 7 show other embodiments of the wire terminal cap according to the present invention.

  The electric wire terminal cap 31 is formed of a synthetic resin as a material so as to be bisected in the radial direction with a flexible thin hinge 32 as a fulcrum, and a locking projection 34 serving as a locking means in the cap body 33. In addition, a cap-shaped resin stopper plate 36 that supports the electric wire 3 and receives the foaming pressure of the foamable sealing material 6 is provided at the end of the cap body 33 on the opening 35 side.

  The cap body 33 includes a bottomed small-diameter portion 37, an intermediate inclined step portion 38, and a large-diameter portion 39 on the opening side. In this example, since the resin stopper plate 36 is provided only at the opening end, it is possible to make the large-diameter portion 39 straight with the same diameter as the small-diameter portion 37 (the step portion 38 is eliminated) depending on the wire diameter. .

  The resin stopper plate 36 of this example is a protruding plate-like projecting part of the inner periphery of the opening 35, and when the sealing material 6 (FIG. 7) in the cap 31 is expanded toward the opening 35 by the foaming pressure. A part of the sealing material 6 is received by the resin stopper plate 36 and the entire sealing material is pressed by the viscosity of the sealing material 6. Therefore, it is suitable for a highly viscous sealing material.

  Of course, the resin stopper plate 36 may be formed in a ring shape over the entire circumference of the opening 35 corresponding to the low-viscosity sealing material, but in that case, the work of inserting and setting the electric wire 3 in the opening is a little cumbersome. Thus, as in this example, the resin stopper plate 36 is made small so that the electric wire 3 can be easily inserted and set in the opening 35, and the opening 35 is almost completely blocked by the electric wire 3 to prevent the sealing material 6 from leaking out. (FIG. 7 shows a form in which the opening 35 is left).

  The resin stopper plate 36 is provided for each divided cap body 33, and each resin stopper plate 36 has a divided surface on the same surface as the divided surface 41 of the cap body 33. As a result, there is no gap between the two resin stopper plates 36 when the two resin stopper plates 36 are joined together, and the receiving performance of the sealing material 6 is enhanced. As shown in FIG. Simplification and cost reduction.

  The locking protrusion 34 in the cap 31 is provided on the base end (rear end) side of the small diameter portion 37, and the shape thereof has an inclined surface 34a near the opening, and is a vertical locking surface near the small diameter portion distal end. 34b. The joint portion 4 of the electric wire 3 is smoothly inserted into the small diameter portion 37 along the inclined surface 34a, and the rear end surface of the joint portion 4 is abutted and locked by the locking surface 34b.

  Similar to the first embodiment, the cap 31 includes two symmetrical split caps 40. The split cap 40 includes a split cap main body 33, a locking projection 34 in each split cap main body, a resin receiving plate 36, and the like. The split cap main body 33 includes a first half half-small diameter portion 37, a second half half-large diameter portion 39, and an intermediate step portion (preferably an inclined portion) 38.

  Both split caps 40 are connected to each other by a thin hinge 32 so that they can be opened and closed. In the vicinity of the split surface 41, one split cap body 33 is provided with a lock projection 42, and the other split cap body 40 is provided with a flexible lock frame piece 43. Then, both the split caps 40 are locked in the closed state by these locking means. The lock means can be applied in various forms such as a lock claw and a lock recess.

  Since the cap 31 is divided, the resin molding of the internal locking projection 34 and the resin receiving plate 36 can be easily performed with good mold release properties. Further, as shown in FIG. 5, with the cap 31 opened horizontally, the sealing material 6 is injected into the cap, the joint portion 4 of the electric wire 3 is inserted and set, and the cap 31 is closed, or the joint portion 4 is first placed in the cap. It is also possible to insert and set the cap 31 by injecting the sealing material 6. As a result, waterproof workability is enhanced.

  As shown in FIG. 6, the sealing material 6 is injected with the cap 31 closed (combined), and the joint portion 4 of the electric wire 3 is inserted (unlike the locking lance, the locking projection 34 is less bent, so the joint It is also possible to insert part 4 strongly). The joint portion 4 is preferably a swaged conductive sleeve having a uniform outer diameter.

  In each of the above embodiments, the foamable sealing material 6 is used, but it is also effective to use a non-foamable sealing material, an inflatable sealing material (that expands during the curing process), or the like instead. .

  1 and FIG. 5, the cap bodies 2 and 33 are connected using the hinges 9 and 32. However, the cap bodies 2 and 33 are separated (independently) without using the hinges 9 and 32. Resin molding is also possible.

It is a disassembled perspective view which shows the state which sets one Embodiment of the cap for electric wire terminals which concerns on this invention, and an electric wire joint part to it. It is sectional drawing which shows the cap for electric wire terminals of the assembly | attachment state similarly filled with the sealing material. (A) is a sectional view showing the resin stopper plate in the cap, (b) is a sectional view showing the action of the resin stopper plate according to the wire diameter, and (c) is a sealing action of the resin stopper plate using foaming pressure. It is sectional drawing shown. It is sectional drawing of the assembly | attachment state which shows other embodiment of the cap for electric wire terminals which concerns on this invention. It is a top view of the unfolding state which shows other embodiment of the cap for electric wire terminals which concerns on this invention. It is a disassembled perspective view which similarly shows the cap for electric wire terminals, and an electric wire joint part. It is sectional drawing which similarly shows the assembly | attachment state of the cap for electric wire terminals. It is sectional drawing which shows the state which inserts an electric wire joint part into one form of the conventional cap for electric wire terminals. It is sectional drawing which similarly shows the assembly | attachment state of the cap for electric wire terminals. It is sectional drawing which shows the other form of the conventional cap for electric wire terminals. It is sectional drawing which shows the other form of the conventional cap for electric wire terminals.

Explanation of symbols

1,21,31 Cap for wire terminal 2,33 Cap body 3 Electric wire 4 Joint part 5 Locking wall part (locking part)
6 Sealing material 7,36 Resin receiving plate (resin receiving part)
7c Bending part 10, 41 Dividing surface 11, 43 Lock frame piece (locking means)
12, 42 Lock projection (locking means)
34 Locking protrusion (locking part)
L Protrusion length

Claims (7)

  An electric wire terminal cap characterized in that a locking portion with respect to a joint portion of an electric wire and a resin receiving portion that contacts the electric wire and receives the pressure of a sealing material in the cap main body are provided inside the cap main body.   The wire terminal cap according to claim 1, wherein the resin receiving portion has flexibility and is inclined toward the locking portion side.   The wire terminal cap according to claim 2, wherein the tip of the resin receiving portion is bent by the pressure of the sealing material and is in close contact with the electric wire.   The wire terminal cap according to claim 2, wherein a plurality of the resin receiving portions are provided in parallel.   5. The wire terminal cap according to claim 4, wherein the plurality of resin receiving portions have different projecting lengths.   The said cap main body is divided | segmented and combined with a locking means, The cap for electric wire terminals of any one of Claims 1-5 characterized by the above-mentioned.   The wire terminal cap according to claim 6, wherein the resin receiving portion is divided on the same surface as a dividing surface of the cap body.

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