JPH0636391B2 - Insulation hermetics for electric wire connection tube fuse and its insulation sealing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention is called a tube fuse, more specifically usually called a glass tube fuse, in which a fuse line is incorporated into a transparent glass tube,
Conductive lids are formed on both outer sides, and conductive wires are soldered to the conductive lids for connection. This conductive lid is used by inserting it into the U-shaped connector of the fuse terminal. In particular, the present invention relates to an insulating hermetically-sealed object of an electric wire connecting tube fuse in which a conductive wire is soldered and connected to the former conductive lid and the connection is insulated, and an insulating hermetic method.

<Prior Art> Conventionally, when a plurality of pipe fuses are used in parallel, as shown in FIG.
Bare wire part (k), (k) at the end of the coated wire (K), (K) connected to
To the conductive lids (3) and (3) by soldering (h), cover the entire tube fuse (A) including vinyl chloride tube (f) for insulation and cover it with a vinyl chloride tube (f). A point adhesive machine such as a sonic welder was used to squeeze one side and weld (w) so as not to move.

<Problems to be Solved by the Invention> Therefore, the conventional tube fuses of this kind are intended only for an insulating action for preventing short-circuit when the tube fuses are in contact with each other. It was not fixed in a completely movement-proof manner, and no consideration was given to waterproofing and dustproofing.

Therefore, if the wire is used in a vertical position, the tube (f) will move and fall from the tube fuse (A) due to the vibration of the equipment.
There is a problem that the function as an insulation coating is impaired, and if it is incorporated into, for example, a food machine or a washing machine that uses water, the gap (a) between the opening at both ends of the tube (f) and the coated electric wire is ), (a), there is a problem that it is not suitable to use as it is because of the risk of short-circuiting due to the ingress of water.

Therefore, the present inventors, as shown in FIG. 6 of the attached sheet, spirally wrap an insulating vinyl tape (t) between one of the conventional tube (f) and the covered electric wire (K). Then, the gap (a) between the tube (f) and the covered electric wire (K) was sealed, and the sealed side was used as an upward posture.In this case, the wiring posture is always It can only be used in the vertical position, restricts the wiring use position, and it takes time to seal the winding with the insulating tape (t), making mass production difficult and costly. However, it has become clear that the tape (t) wound during many years of use loosens due to deterioration of the adhesive, and the sealing performance deteriorates. On the other hand, the inventors of the present invention, as shown in FIGS. 7 and 8 of the attached sheet, solder the coated electric wires (K) and (K) to the tube fuse (A) in the same manner as in the conventional means, and thereafter, As shown in Fig. 8, flatten the opening of the resin tube (f) covering the entire length of the tube fuse (A) including these adhesive parts, as shown in Fig. 8. And tried to welder bond (w).

However, in this case, it is difficult to form the contact angle portions (d) and (d) between the flat weight portion (w) and the wire covering portion in a completely airtight manner, and the capacity of the fuse wire depends on the capacity. Therefore, it has become clear that there is a problem that it is necessary to change the welder type depending on the size of the different wire diameter.

Therefore, in order to solve these problems and the above-mentioned conventional problems all at once, the present invention abolished the means of bonding a tube by using a welder, and based on a completely new idea, the wire diameter can be changed depending on the size. A method for sealing an electric wire connecting pipe fuse, which can completely seal the connecting portion between the pipe fuse and the electric wire by heating the outer peripheral portion of the tube without being damaged, and a product sealed in this way. It is intended to provide and.

<Means for Solving the Problems> An insulating hermetically sealed electric wire connecting tube fuse according to the present invention adopted to achieve the object is shown in FIGS.
Explaining with reference to the drawings, the present invention shows that the bare wire ends (k), (k) are soldered (h), (h) to the conductive lids (3), (3) of the tube fuse (A), respectively. ) And the two sheathed wires (K), (K) that are connected to each other, and the sheathed tube (B) that covers the wire joints (C), (C) and the pipe fuse (A) are heat-shrinked. A series of transparent or semi-transparent long tubular double tubes (B) consisting of a transparent resin tube (4) and a hot-melt resin layer (5) formed on its inner surface,
Heat shrinking of both outer ends of heat shrinkable resin tube (4) (4 ')
As the above-mentioned two covered electric wires (K), the respective covered parts of (K)
(e), the hot-melt resin layer heat-melted on (e)
Adhere to the outer peripheral surface of the covering parts (e) and (e) through (5 ') for an appropriate length to form a sealed air chamber between the double tube (B) and the tube fuse (A). It is a thing.

If the double tube (B) is transparent or semi-transparent, it is convenient because the cutting state of the fuse line (2) can be confirmed from the outside.

In addition, as a method for producing such an insulation-sealed product of a wire connection pipe fuse, the two covered wires (K), the bare wire ends (k) and (k) of the (K) are connected to a pipe fuse ( Soldered (h) and (h) to the conductive lids (3) and (3) of A), respectively, and then connected to the heat-shrinkable resin tube (4) and the hot-melt resin layer formed on the inner surface thereof. (5) A tubular transparent or translucent double tube (B) consisting of (5) is used, and the double tube (B) is used as a tube fuse.
(A) and then, the both ends of the double tube (B) is heated to heat-shrink (4 ') both ends of the heat-shrinkable resin tube (4) over an appropriate length. At the same time, the hot-melt resin layer (5) is melted to bring the hot-melt resin layer (5 ′) into close contact with the coated electric wires (K), (K) on the coated portions (e) and (e), This is an insulating and sealing method for electric wire connection pipe fuses, which forms a sealed air chamber between the heavy tube (B) and the pipe fuse (A).

<Operation> Since the present invention is configured as described above, it is not necessary to consider the wiring direction and the wiring posture even when used in a device such as a food machine or a washing machine, which may be splashed with water, and therefore, the chute It is possible to use it with peace of mind without fear.

<Examples> Examples of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 are views showing a first embodiment of the present invention. FIG. 1 shows a side view of the electric wire connecting tube fuse according to the present invention and a tubular double tube (B). A structure with a central longitudinal section is shown, and FIGS. 2 and 3 are views showing means in the sealing method. Then, the tube fuse (A) is fitted on both ends of the glass tube (1), the fuse wire (2) stretched inside the glass tube (1) and the glass tube (1), and the fuse wire (2) is attached. Conductive lid (3), (3)
It is a well-known item consisting of and. The double tube (B) is composed of a heat-shrinkable tube (4) made of colored transparent nylon and a heat-melting layer (5) of polyamide material coated on the inner surface of the tube, and is formed into a full-length concentric cylindrical shape. It has a cylindrical shape, and its length is such that it can extend beyond both ends of the tube fuse (A) and be further extended outward.

Thus, two covered electric wires that are connected and connected to the pipe fuse (A)
(K), (K) are stripped of the coating on the ends of the bare wires (k), (k)
Then, they are connected by soldering (h) and (h) to the conductive lids (3) and (3) of the tube fuse (A), respectively.

Then, as shown in FIG. 1, one covered electric wire is previously
The double tube (B) inserted in (K) is transferred to the tube tube (A) as shown in FIG.
The covered electric wires (K) at both ends of (B), the front peripheral surface of the portion located on (K) are heated by a heating device such as a hot gun,
Heat shrink deformation is performed as shown in the figure.

By this heating device, the heat shrink tube (4) of the outer layer of the double tube (B) shrinks (4 '), and the hot melt layer (5) of the inner layer melts.
(5 ') and tightly bond to the outer peripheral surfaces of the coated wires (K) and (K) at the coated portions (e) and (e) over an appropriate length to form a double tube (B) and a tube fuse (A). To form a sealed air chamber. In addition, the heat-fusible resin layer (5) is formed between the electric wires (K), (K) covering portions (e), (e) and the tube (4) by the contraction pressure of the heat-shrinkable resin tube (4). The part remains and a part flows out to form the condensing parts (5a) and (5a) on the electric wire coating.

As described above, the two soldered wires (K),
(K) and the tube fuse (A) and their connecting parts (C) and (C) are completely sealed.

The seal formed in this way has a double tube
Only the both ends of (B) are heated and shrunk to the outer peripheral surface of the covered wire (K), the covered part (e), (e) of the (K), and the double tube as shown in FIG.
Since a sealed air chamber is formed between (B) and the tube fuse (A), the sealed air chamber exerts a cushioning effect even when an impact is applied to the double tube (B) from the outside. The double tube (B) referred to in the present invention capable of protecting the tube fuse (A) has the outer layer of high density polyethylene (HDPE) in addition to that shown in the first embodiment.
The inner layer may be made of polyamide, or may be a double layer of high temperature nylon and low temperature melting nylon. The internal hot-melt material may be a hot-melt adhesive,
In particular, a material having a good adhesive property with polyvinyl chloride (PVC) which is generally used as a covering material for electric wires is suitable.

Further, since the heat-shrinkable tube (4) is formed of a transparent body or a translucent body including the heat-melting layer (5) of the inner layer, the insertion state of the electric wire with respect to the internal tube fuse (A), and the adhesion. The state and the like can be seen through, and the state of the fuse line (1) can be seen through and confirmed, which is convenient. In addition, the tube fuse is colored by coloring the tube.
Depending on (amperes), different colors can be used conveniently without making a mistake in the capacity.

Although the examples considered to be typical of the present invention have been described above, the present invention is not necessarily limited only to the structures of these examples, and has the constituent features referred to in the present invention and has the object referred to in the present invention. The present invention can be carried out with appropriate modifications within the scope of achieving the following effects.

<Effects of the Invention> The present invention has the following effects due to the above configuration.

Both ends of the double tube (B) are covered with electric wires (K), (K)
(e), due to heat shrinkage on the outer peripheral surface of (e)
Since (A) is sealed, even if it is used in a washing machine or food machine where it may be splashed with water, there is no need to consider the wiring direction or wiring posture, and there is no fear of shorts and it can be used with peace of mind. it can.

Only the both ends of the double tube (B) are heated and shrunk to the outer peripheral surface of the sheathed parts (e), (e) of the covered electric wire (K) (K), and the double tube (B) and the tube fuse (A) are Since a sealed air chamber is formed between them, even if the double tube (B) is impacted from the outside, the sealed air chamber exerts a cushioning effect and the internal tube fuse
(A) can be protected safely.

Both ends of the double tube (B) are covered with electric wires (K), (K)
(e), Since the outer peripheral surface of (e) is heat-shrinked over an appropriate length, the covered electric wire (K) (K) and the double tube (B) can be reliably connected, and It is possible to enhance the sealing property with respect to the airtight air chamber inside.

Since the double tube (B) is transparent or semi-transparent, it is possible to see through the insertion state of the electric wire into the internal tube fuse (A) and also to see through the fuse line. Can be conveniently used.

[Brief description of drawings]

1 to 4 are views showing a first embodiment of the present invention. FIG. 1 is a side view in which a part of the center is longitudinally cut, and FIGS. 2 and 3 are sealing orders in the same part. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, FIG. 5 is a perspective view showing a conventional insulation method, FIG. 6 is a perspective view showing an improved example, and FIG. FIG. 8 and FIG. 8 are a partial central vertical cross-sectional view and a cross-sectional view taken along line XX showing another modification. In the figure, (1) is a transparent cylinder, (2) is a fuse line, (3) is a conductive lid,
(4) and (4 ') are heat-shrinkable resin tubes, (5) and (5') are heat-meltable resin layers, (A) is a tube fuse, (B) is a double tube, (C)
Is the wire connection part, (K) is the covered wire, (k) is the bare wire end, (e)
Is a coating portion, and (h) is a soldering portion.

Claims (2)

[Claims] 1. A tube fuse (A) in which a fuse wire (2) is provided inside a transparent cylinder (1), and conductive lids (3), (3) are formed at both ends of the cylinder (1). ) And the conductive lids (3) and (3) of the tube fuse (A), respectively, to the bare wire ends (k) and (k) of the covered wire.
Soldered (h), two covered wires connected by (h)
(K), (K) and their wire connection parts (C), (C) and pipe fuse
(A) a coating tube (B) that covers the top and the bottom, the coating tube (B) is a heat-shrinkable resin tube (4) and a heat-meltable resin layer (5) formed on the inner surface of the transparent tube Or a series of semi-transparent long tubular double tubes (B), wherein the two covered wires (K), (K) are covered on the respective covered parts (e), (e). Both ends of the tube (B) are heat-shrinked (4 ') and adhered to the outer peripheral surface of the coated parts (e) and (e) through the hot-melt resin layer (5') for an appropriate length. , An insulated seal of a wire connection pipe fuse that forms a sealed air chamber between the double tube (B) and the pipe fuse (A). 2. A tubular transparent or semitransparent double tube (B) comprising a heat-shrinkable resin tube (4) and a hot-melt resin layer (5) formed on the inner surface of the tube is used. Heavy tube (B)
, The two covered electric wires (K) to be connected, (K) is inserted in advance in the covered electric wire (K) in the case of long, then the two covered electric wires (K), (K) Stripped bare wire ends (k), (k)
, And the fuse fuse (2) inside the transparent cylinder (1). Solder the fuse to the conductive lid (3) and (3) of the tube fuse (A), respectively.
(h), (h), and then connect the double tube (B) onto the tube fuse (A) or insert the tube from the free end side of the covered wires (K) and (K). When it is transferred to the fuse (A) and then both ends of the double tube (B) are heated to heat shrink (4 ′) both ends of the heat-shrinkable resin tube (4) over an appropriate length. At the same time, the heat-fusible resin layer (5) is melted and the heat-fusible resin layer (5 ') is covered with the covered electric wires (K), (K).
(e), Double tube (B) and tube fuse in close contact with (e)
A method for insulating and sealing an electric wire connecting pipe fuse, which forms a sealed air chamber with (A).