JPH07322467A - Waterproofing method for covered electric wire and waterproof structure for covered electric wire - Google Patents

Abstract

PURPOSE:To secure the waterproof property on one side of a covered cable which does not need waterproof processing on the other side, by fusing and scattering the covered section of the covered cable caught with a pair of resin chips, and fusing a pair of resin chips together with each other, and charging fused resin chips among the core wires. CONSTITUTION:One resin chip 55 is inserted into the center hole 65 of an anvil 59, and from above it, a covered cable W1 is inserted into a groove 67, and further from above it, the other resin chip 53 is inserted. Hereby, the covered cable W1 is caught from vertical direction at about center between the resin chips 53 and 55. Next, the covered section 3 of the covered cable W1 caught between the resin chips 53 and 55 is fused and scattered to expose the conductor line 4, and a pair of resin chips 53 and 55 are fused together witch each other, and also the resin chips 53 and 55 fused among the core wires 1a are charged to seal the exposed conductor line 1. Hereby, waterproof property on one side of the covered cable W1 not requiring waterproof property on the other side can be secured with simple work and structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof method for a covered electric wire and a waterproof structure.

[0002]

2. Description of the Related Art As shown in FIG. 12 (a), a plurality of connectors P,
The one in which Q and R are connected has been widely used from the past. In some cases, the multipolar connector N is provided with a portion n (waterproof portion) that requires a waterproof function. In such a case, the waterproof portion n is waterproofed.

However, as shown in FIG. 12 (b), voids C are formed between the sheath 3 inside the coated wire W and the core 1a and between the cores 1a, and the void C is formed by the so-called capillary phenomenon. Since water etc. can be distributed, the connector P,
Water that has flowed into the covered electric wire W from Q and R may pass through the void C and flow out into the multipolar connector N. Therefore, even if the waterproof part n is waterproofed, the waterproof property may not be sufficiently ensured.

As a method for avoiding such inconvenience, there is known a method of waterproofing the three connectors P, Q and R connected to the multipolar connector N. According to this method, water does not flow into the covered electric wire W, and the waterproof property of the waterproof part n can be ensured.

[0005]

However, in such a conventional method, even if the connectors P, Q, and R to be connected include the connectors (for example, P and Q) which are not required to be waterproof in terms of function, they are all used. Since waterproof treatment is required for the connectors P, Q, and R, it is unavoidable that the cost increases due to the complicated structure of the connectors P and Q and the complicated work.

In view of the above circumstances, the present invention provides a method for waterproofing a covered electric wire and a waterproof structure for a covered electric wire, in which the waterproofness of the other end of the covered electric wire which does not require waterproofing on one end can be ensured by a simple operation and structure. For the purpose of providing.

[0007]

The invention according to claim 1 is
A method for waterproofing a covered electric wire in which the outer periphery of a conductor wire portion composed of a plurality of core wires is covered with a resin covering portion, the first step of sandwiching the coated electric wire with a pair of resin chips, and the sandwiching with the resin chip. And a second step of filling the melted resin chip between the core wires while causing the covered portion to be scattered and melted to weld the pair of resin chips to each other.

According to a second aspect of the present invention, there is provided a waterproof structure for a covered electric wire in which the outer periphery of a conductor wire portion composed of a plurality of core wires is covered with a resin covering portion, and the conductor wire portion of the covered electric wire is exposed. A resin material is filled between the core wires, and the exposed conductor wire portion is sealed by the resin material.

According to a third aspect of the present invention, there is provided a method for waterproofing a covered electric wire according to the first aspect, wherein in the second step, the pair of resin chips are sandwiched from above and below the covered electric wire. It is characterized in that the coated electric wire is pressed and vibrated from the outside between the horn and the anvil, and the directions of the pressurization and vibration are the vertical direction.

The invention according to claim 4 is the waterproof structure of the covered electric wire according to claim 2, wherein the resin material is a transparent body.

A fifth aspect of the present invention is the waterproof structure of the covered electric wire according to the second or fourth aspect, wherein the covered electric wire has a plurality of conductor wire portions in a sheet-like resin covered portion. It is characterized by being a flat cable in which are installed in parallel.

[0012]

According to the first aspect of the present invention, in a state where the covered electric wire is sandwiched between the pair of resin chips, the covering portion is scattered and melted to expose the conductor wire portion, and the pair of resin chips are welded to each other and the core wire is interposed between the core wires. Fill with molten resin chips. As a result, the exposed conductor wire portion is sealed by the resin chip, and the voids formed between the core wires of the covered electric wire are blocked by the hardened resin chip, and the internal water blocking is performed between the covered electric wires on both sides of the resin chip. The effect can be obtained.

Further, since the pair of resin chips has a size and shape capable of sandwiching the covered electric wire from above and below, it is possible to keep the portion for waterproofing the covered electric wire narrow.

Further, such a method is a relatively simple method in which the covered electric wire is sandwiched between a pair of resin chips and welded to each other, and the shape and the like of the covered electric wire are not particularly limited. It can be easily applied to the covered electric wire, and high versatility can be obtained.

According to the second aspect of the present invention, the conductor wire portion of the covered electric wire is exposed, the resin material is filled between the core wires, and the exposed conductor wire portion is sealed with the resin material. The voids formed in the above are blocked by the resin material, and an internal water blocking effect can be obtained between the covered electric wires on both sides of the resin material.

Further, since the resin material has a size and shape capable of hermetically sealing the covered electric wire, it is possible to narrow the portion to be treated on the covered electric wire.

Further, since such a structure does not particularly limit the shape of the covered electric wire and the like, it can be easily applied to the covered electric wires of various shapes and high versatility can be obtained.

According to the third aspect of the present invention, when the pair of resin chips are sandwiched from above and below the covered electric wire and the covered electric wire is pressed and vibrated from the outside of the resin chip between the horn and the anvil, the resin chip and the covering portion are melted. Then, since the resin chips are welded to each other and the molten resin chips are filled between the core wires, the same effect as that of the invention according to claim 1 can be obtained by such a simple method.

Further, since the pressing direction of the resin chip is the vertical direction, the molten coating part is extruded from the center side of the resin chip toward the outside at the time of pressing, and the conductor wire part is satisfactorily formed in the resin chip. Exposed.

Further, since the direction of vibration is the same as the direction of pressurization in the vertical direction, a good welded state of the resin chip can be obtained and the action of pushing the covering portion outward from the center side of the resin chip is increased. To be done.

According to the invention of claim 4, in addition to the function of the invention of claim 2, since the resin material is a transparent body, the filled state of the resin material can be seen from the outside.

According to the invention of claim 5, a flat cable in which a plurality of conductor wire portions are arranged side by side in a sheet-shaped resin-made covering portion is the same as in the invention of claim 2 or 4. The action can be obtained, and the versatility is further enhanced.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the inventions of claims 1 to 4 will be described below with reference to the drawings.

FIGS. 1 and 2 are perspective views showing a means for obtaining a waterproof structure for a covered electric wire according to the first embodiment. FIG. 1 shows a state before starting waterproofing, and FIG. 2 shows a state after starting waterproofing. It shows the state. 3A and 3B are schematic views showing a cross section of the main part taken along the arrow A in FIG. 2, where FIG. 3A shows a state at the time of starting the waterproofing process, and FIG. Figure 4
5 is a perspective view showing the waterproof structure of the covered electric wire according to the first embodiment, FIG.
3A is a sectional view taken along the line D-D of FIG. 3A, and FIG.
The EE sectional view of (b) is shown.

First, a method of waterproofing the covered electric wire W according to the first embodiment will be described.

As shown in FIG. 1, in the covered electric wire W, the outer periphery of the conductor wire portion 1 formed of a plurality of core wires 1a is covered with a resin covered portion 3
Is covered with, and the waterproof of the covered electric wire W is
A pair of resin chips 53 and 55 as the resin material 51, a horn 57 that generates ultrasonic vibration, and an anvil 59 that supports the covered electric wire W and the resin chips 53 and 55 are used.
The anvil 59 includes a base 61 and a support portion 63 protruding from the base 61, and the support portion 63 is formed in a substantially cylindrical shape. The support portion 63 has an inner diameter portion 65 that is open on the side opposite to the base (upper side in the drawing), and the peripheral wall 63 a of the support portion 63 is provided with two groove portions 67 that face each other with the center of the inner diameter portion 65 interposed therebetween. ing. The two groove portions 67 open on the same side as the inner diameter portion 65 and are formed along the protruding direction of the support portion 63.
It communicates through 5. A pair of resin chips 53, 55
Is formed in the shape of a circular plate having an outer diameter slightly smaller than the inner diameter portion 65 of the anvil 59, and the head portion 71 of the horn 57.
The end surface 71a is formed in a circular shape having an outer diameter substantially the same as or slightly smaller than that of the resin chips 53, 55. The material of the resin chips 53, 55 is acrylic resin, ABS
(Acrylonitrile-butadiene-styrene copolymer)
Examples include resin based resins, PC (polycarbonate) based resins, PVC (polyvinyl chloride) based resins, PE (polyethylene) based resins, and the like.

In order to waterproof the covered electric wire W, first, the covered electric wire W is sandwiched between the pair of resin chips 53 and 55 from above and below.

Specifically, one (lower) resin chip 55 is inserted into the inner diameter portion 65 of the anvil 59, the covered electric wire W is inserted into the groove portion 67 from above, and the other (upper) portion from above. The resin chip 53 is inserted. As a result, the covered electric wire W is in a state of being sandwiched between the upper and lower resin chips 53 and 55 substantially at the center from the vertical direction.

Next, the coating portion 3 sandwiched between the resin chips 53 and 55 is scattered and melted to expose the conductor wire portion 1, and the pair of resin chips 53 and 55 are welded to each other and melted between the core wires 1a. The resin chips 53 and 55 are filled and the exposed conductor wire portion 1 is sealed.

Specifically, the head 71 of the horn 57 is inserted from above the resin chip 53 on the upper side (other side) which is finally inserted, and the covered electric wire W is inserted from the outside of the upper and lower resin chips 53 and 55 to the horn. Pressure and vibration are applied between 57 and anvil 59. Pressurization is performed by pressing the horn 57 toward the anvil 59, and the direction of pressurization coincides with the vertical direction.

When the resin materials 51 are welded together by ultrasonic vibration, the best welding condition is obtained by vibrating in a direction intersecting the joining surface of the resin materials 51 substantially perpendicularly. The direction of vibration to the both resin chips 5
It is set in a direction intersecting with the surfaces 53a, 55a of the motors 3, 55 facing each other, that is, in the up-down direction, by which the so-called longitudinal vibration is transmitted from the horn 57.

In this state, the covered electric wire W and the resin chip 5
When 3 and 55 are pressurized and vibrated, the coating portion 3 is melted first, and the conductor wire portion 1 of the coated electric wire W is exposed between the resin chips 53 and 55. At this time, since the covered electric wire W is pressed from above and below, the melted covering portion 3 is covered with the resin chip 53,
The conductor wire portion 1 is extruded from the center side of 55 toward the outside.
Is well exposed. Further, since the vibration direction is set to the vertical direction similarly to the pressing direction, the covering portion 3 is covered with the resin chip 5
The action of pushing out from the center side of 3,55 to the outside is increased.

If the pressure and the vibration are continued even after the covering portion 3 is melted, the resin chips 53, 55 are melted and the surfaces of the resin chips 53, 55 facing each other (the lower surface 53a of the upper resin chip 53 and the lower surface). The upper surface 55a) of the side resin chip 55 is welded, and the outer peripheral surface of the covering portion 3 adjacent to the conductor wire portion 1 in conductive contact is welded to the resin chips 53, 55. As a result, the area around the conductor wire portion 1 that is in conductive contact is covered with the resin chips 53 and 55.

As shown in FIG. 5 (a), voids C are formed inside the covered electric wire W before pressurization and vibration, between the covering portion 3 and the core wire 1a and between the core wires 1a. But the coating 3
Is melted and scattered, the void C between the covering portion 3 and the core wire 1a is filled with the melted resin chips 53 and 55, and as shown in FIG. 5B, the resin chips 53 and 55 are pressed from above. By doing so, the molten resin chips 53 and 55 are filled between the core wires 1a. That is, the void C inside the covered electric wire W is blocked by the resin chips 53 and 55.

After the resin chips 53 and 55 have been melted, the pressure and vibration applied by the horn 57 are stopped, the covering portion 3 and the resin chips 53 and 55 are cured, and the waterproofing work is completed.

Next, the waterproof structure of the covered electric wire of the first embodiment obtained by the waterproof method will be described.

As shown in FIG. 4A, in this waterproof structure, the covered electric wire W is waterproofed with a resin material 51 consisting of a pair of resin chips 53 and 55. Inside the resin material 51, as shown in FIG. As shown in (b), a resin material 51 is filled between the exposed core wires 1 a of the conductor wire portion 1, and the exposed conductor wire portion 1 is sealed by the resin material 51.

With such a structure, the void C inside the covered electric wire W is blocked by the resin material 51, and even if water flows through the inside of the covered electric wire W on one side of the resin material 51 due to a so-called capillary phenomenon, the water will not flow. Does not flow out to the other side of the resin material 51, and a waterproof effect can be obtained inside the covered electric wire W.

FIG. 6 is a schematic view showing an example of use of waterproof treatment of a covered electric wire with a resin material.

As shown in the figure, a multi-pole connector N provided with a functionally waterproof portion n (waterproof portion) is connected to a connector P, which does not require functional waterproof treatment, through a covered electric wire W. When connecting Q and the connector R that requires a waterproofing function, the covered electric wires Wa, W connecting the connectors P, Q
By waterproofing each of b and Wc with the resin material 51, it is possible to reliably prevent the water flowing into the covered electric wire W from the connectors P and Q from flowing out into the multipolar connector N. be able to. Therefore, the connectors P, Q themselves are not waterproofed.
It is possible to sufficiently secure the waterproof property of the waterproof part n while keeping the structure simple, and to reduce the cost.

As described above, according to the waterproof method and the waterproof structure according to the first embodiment, the resin chip 5 is sandwiched between the pair of resin chips 53 and 55 and the resin chip 5 is formed.
The water blocking effect inside the coated electric wire W can be obtained only by spraying and melting the coating portion 3 while applying pressure from the outside of the wiring 3, 55 and welding the resin chips 53, 55 to each other. Therefore, when connecting the other end of the covered electric wire W whose one end side is connected to the part requiring waterproof treatment to the part where the waterproof treatment is not required functionally, the covered electric wire W is subjected to the waterproof treatment by the resin material 51. With the simple work and configuration of
It is possible to secure waterproofness on one end side without performing waterproof treatment on the other end side.

The resin chips 53 and 55 are covered wires W.
Since it can be sandwiched from above and below,
The area to be waterproofed can be limited to a narrow range.

In the waterproof method, the covered electric wire W is sandwiched between the resin chips 53 and 55, and the covered electric wire W is pressed and vibrated between the horn 57 and the anvil 59 from the outside of the resin chips 53 and 55. Since the waterproof method and the waterproof structure are not particularly limited to the shape of the covered electric wire W and the like, they can be easily applied to various covered electric wires W and have high versatility. To be

Further, a pair of resin chips 53, 55 is sandwiched from above and below the covered electric wire W, and pressure and vibration are applied between the horn 57 and the anvil 59 from the outside of the resin chips 53, 55. Since the direction is set to the direction, when the coated electric wire W is pressed, the melted coating portion 3 is extruded outward from the center side of the resin chips 53 and 55, and the conductor wire portion 1 is well exposed. Further, since the vibrating direction is the same as the pressurizing direction in the vertical direction, a good welded state of the resin chips 53 and 55 is obtained, and the action of extruding the covering portion 3 is enhanced. Therefore, the water blocking effect and the sealed state by the resin chips 53 and 55 can be obtained more reliably.

Furthermore, in the first embodiment, the resin material 51 is made transparent so that the resin chips 53 and 55 are formed.
The filled state can be seen from the outside of the resin material 51, and quality control can be facilitated and quality can be improved.

Next, a second embodiment according to the invention of claim 5 will be described.

7 and 8 are perspective views showing a means for obtaining the waterproof structure of the covered electric wire according to the second embodiment. FIG. 7 shows a state before waterproof treatment, and FIG. 8 shows a state during waterproof treatment. Shows. 9 is a sectional view of the horn of FIG. 8, FIG. 10 is an overall perspective view of the flat cable, and FIG. 11 is a perspective view showing a usage state in which the flat cable is folded. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 7, in the second embodiment, one conductor wire portion 1 of a flat cable 75 in which a plurality of conductor wire portions 1 are juxtaposed in a sheet-shaped resin covering portion 73 is waterproofed. This flat cable 75 constitutes a covered electric wire.

The waterproofing method for the covered electric wire according to the second embodiment is almost the same as that of the first embodiment, and the resin chip 5 on the lower side is used.
5 is inserted into the inner diameter portion 65 of the anvil 59, and the conductor wire portion 1 in the covering portion 73 of the flat cable 75 is inserted into the groove portion 67 from above. In this case, since the covering portion 73 has a sheet shape, the conductor wire portion 1 cannot be completely inserted into the groove portion 67, and the flat cable 75 is placed on the anvil 59 as shown in FIG. Therefore, the inner diameter portion 65 and the groove portion 67 are shallowly formed in accordance with this.
In addition, the flat cable 7 placed on the anvil 59
When the upper resin chip 53 is arranged on the resin chip 5,
Since 3 is placed on the flat cable 75, it is difficult to position the resin chip 53 and pressurize and vibrate with the horn 57. Therefore, as shown in FIG. 9, a cylindrical tip holding member 77 is provided outside the horn 57, and the head 71 of the horn 57 can be inserted into the lower end 77 a of the tip holding member 77 so that the resin chip 53 can be inserted.
Is provided with an opening 79 for temporarily holding the upper end of the resin chip 53 in the opening 79, and the lower end 77a of the tip holding member 77 is held inside the anvil 59 as shown in FIG. The upper resin chip 53 temporarily pressed against the flat cable 75 and pressed against the flat cable 75 to push out the upper resin chip 53 temporarily held downward,
The conductor wire portion 1 in the flat cable 75 is sandwiched between 3, 55. Further, at the lower end of the chip holding member 77, the covering portion 73
A groove 77b having an arcuate cross-section that fits into the conductor wire portion 1 from the outside is formed, and this groove portion 77b facilitates positioning when the chip holding member 77 is abutted on the flat cable 75. . The subsequent waterproofing method is the same as that of the first embodiment.

The waterproof structure of the covered electric wire of the second embodiment obtained by the above-mentioned waterproofing method is almost the same as that of the first embodiment shown in FIG. 4, and inside the resin material 51 consisting of a pair of resin chips 53, 55. The coating portion 73 is scattered and melted to expose the conductor wire portion 1 of the flat cable 75, the resin material 51 is filled between the core wires 1a of the exposed conductor wire portion 1, and the exposed conductor wire portion 1 is covered with the resin material 51. It is sealed.

As described above, according to the second embodiment, the same effect as that of the first embodiment can be obtained for the flat cable 75.

By making the resin material 51 a transparent body, the conductive contact state of the conductor wire portion 1 can be seen from the outside of the resin material 51.

[0053]

As described above, according to the invention described in claim 1 or 2, it is possible to obtain the water blocking effect inside the covered electric wire with a simple work or structure. When one end of the wire is connected to a part that requires waterproofing and the other end is connected to a part that does not functionally require waterproofing, water or the like flows into the covered wire from the other end due to the capillary phenomenon. However, the water blocking effect prevents the outflow of water or the like to one end side. Therefore, the waterproofness of the one end side can be secured by a simple and inexpensive method without performing the waterproofing treatment on the other end side that does not require waterproofing. Further, since the range of waterproof treatment is narrow and the shape of the covered electric wire does not matter, high versatility can be obtained.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, the conductor wire portion is better exposed at the time of pressurization, and a reliable waterproof effect and a sealed state are obtained. Is obtained.

According to the invention of claim 4, in addition to the effect of the invention of claim 2, the filled state of the resin material can be seen from the outside, facilitating the quality control and improving the quality. be able to.

According to the invention of claim 5, even with a flat cable, the same effect as that of the invention of claim 2 or 4 can be obtained, and the versatility is further enhanced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a means for obtaining a waterproof structure for a covered electric wire according to a first embodiment (showing a state before starting waterproofing processing).

FIG. 2 is a perspective view showing a means for obtaining a waterproof structure for a covered electric wire according to the first embodiment (showing a state after starting waterproofing processing).

FIG. 3 is a schematic view showing a cross section of the main part taken along the arrow A in FIG. 2, where (a) shows the state at the start of waterproofing, and (b).
Indicates the state after the waterproofing process is started.

FIG. 4 is a perspective view showing a waterproof structure of the covered electric wire according to the first embodiment.

5 is a cross-sectional view of FIG. 3, (a) is a D of FIG.
-D sectional drawing, (b) has shown the EE sectional drawing of FIG.3 (b).

FIG. 6 is a schematic diagram showing a usage example of waterproofing of a covered electric wire with a resin material.

FIG. 7 is a perspective view showing a means for obtaining a waterproof structure for a covered electric wire according to a second embodiment (showing a state before starting waterproofing processing).

FIG. 8 is a perspective view showing a means for obtaining a waterproof structure for a covered electric wire according to a second embodiment (showing a state after starting waterproofing processing).

9 is a cross-sectional view of the horn of FIG.

FIG. 10 is an overall perspective view of a flat cable.

FIG. 11 is an overall perspective view showing a usage state in which a flat cable is folded.

12A is a perspective view showing a conventional example, and FIG. 12B is a sectional view of a covered electric wire.

[Explanation of symbols]

 1 Conductor Wire Part 1a Core Wire 3 Cover Part 51 Resin Material 53 Resin Chip 55 Resin Chip 57 Horn 59 Anvil 73 Cover Part 75 Flat Cable (Coated Wire) W Coated Wire

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[Procedure amendment]

[Submission date] February 9, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

As shown in FIG. 4, in this waterproof structure, the covered electric wire W is waterproofed with a resin material 51 consisting of a pair of resin chips 53 and 55. Inside the resin material 51, as shown in FIG. As shown in FIG. 2, the resin material 51 is filled between the exposed core wires 1 a of the conductor wire portion 1 to expose the exposed conductor wire portion 1.
Are sealed by the resin material 51.

Continuation of the front page (72) Inventor Mineo Takahashi 206-1 Nunobikibara, Haibara-machi, Haibara-gun, Shizuoka

Claims (5)

[Claims] 1. A waterproofing method for a covered electric wire in which the outer periphery of a conductor wire portion composed of a plurality of core wires is covered with a resin covering portion, the first step of sandwiching the covered electric wire with a pair of resin chips, And a second step of filling the melted resin chip between the core wires while causing the coating portion sandwiched by the resin chips to be scattered and fused to weld the pair of resin chips to each other. Waterproof method. 2. A waterproof structure for a covered electric wire, wherein the outer circumference of a conductor wire portion composed of a plurality of core wires is covered with a resin covering portion, wherein the conductor wire portion of the covered electric wire is exposed and a resin material is provided between the core wires. A waterproof structure for a covered electric wire, comprising filling and sealing the exposed conductor wire portion with this resin material. 3. The waterproof method for a covered electric wire according to claim 1, wherein in the second step, the pair of resin chips are sandwiched from above and below the covered electric wire, and the covered electric wire is attached from the outside of the resin chip. A method for waterproofing a covered electric wire, characterized in that pressure and vibration are applied between a horn and an anvil, and the directions of pressure and vibration are the vertical direction. 4. The waterproof structure for a covered electric wire according to claim 2, wherein the resin material is a transparent body. 5. The waterproof structure for a covered electric wire according to claim 2, wherein the covered electric wire is a flat cable in which a plurality of conductor wire portions are juxtaposed in a sheet-shaped resin covered portion. The waterproof structure of the covered electric wire is characterized by: