JP5634921B2 - Electric wire fuse - Google Patents

Description

  The present invention relates to a separable electric wire fuse that is easy to recycle and is environmentally friendly.

In recent years, from the viewpoint of environmental protection, the need for recycling is also required for power equipment.
As one of such power equipment, there is a power fuse attached to an electric wire connecting the secondary side of the pole transformer and the customer's service port.
The power fuse includes, for example, a fuse main body 1 and an outer case 2 as shown in Patent Document 1 in FIG. 5. The fuse main body 1 is formed from both ends of a glass tube 4 in which a fuse element 3 is enclosed. It has a structure in which a connection sleeve 7 for connecting to an electric wire 13 is compressed and attached to a connection terminal 6 projected through a heat insulating member 5 for closing.
On the other hand, the outer case 2 includes a cylindrical and transparent outer case main body 8 and caps 9 attached to both ends of the case main body 8, and a through hole 10 for inserting the connection sleeve 7 through the cap 9. The structure is provided.
As described above, the wire fuse is made of a member of a different type or material, such as a resin constituting the heat insulating member of the outer case 8 or the fuse body 1, glass of the glass tube 4, copper forming the fuse element 3, or solder. Has been.

  By the way, since such a wire fuse is often installed on a power pole, for example, in the case of FIG. 5, the outer case 2 and the cap 9 are bonded in a state where the fuse body 1 is accommodated in the outer case 2. Glue with the agent. Further, a seal material (for example, silicone) 11 is applied to the joint portion between the cap 9 and the outer case 2, and the seal material 11 is also applied around the connection sleeve 7 protruding from the through hole 10 of the cap 9. The terminal cover 12 is attached to the connecting portion between the protruding connection sleeve 7 and the electric wire 13. Thus, the electric wire fuse has a structure that cannot be easily disassembled in order to maintain waterproofness.

JP 2008-293908 A

However, in the case of the electric wire fuse having the above structure, when it is disposed of by replacing the electric wire, it is difficult to separate for recycling.
For example, even if an attempt is made to separate the fuse body and the outer case to separate the metal and the resin for separation, it is difficult to remove the adhesive or the sealing material that bonds the outer case body and the cap.
On the other hand, in order to pulverize and separate, a large pulverizer is required. Therefore, there is a problem that the cost is excessive when the number of processed wire fuses is small.
Incidentally, the metal recovered from the crushed electric wire fuse is mainly copper. At this time, since a simple magnetic adsorption method cannot be used to collect copper, it must be manually separated from the crushed pieces, and if a method other than magnetic force is used, labor and cost are required. The problem which passes too much also occurs.

By the way, since the pulverization has the above-mentioned problems, a melting method can be considered. Although it can be separated into a metal and a resin by melting, the separated metal may be mixed with a metal other than copper due to melting.
At this time, a large melting apparatus must be prepared for melting. If the processing quantity is small, there is a problem that the cost is excessive.

  Therefore, the object of the present invention is not to use a large-scale apparatus or method, but to allow disassembly and separation with a simple tool so that even a small amount of processing can be performed without cost. is there.

  In order to solve the above problems, in the present invention, a connection sleeve for connecting to an electric wire is compressed and attached to a connection terminal protruding through a heat insulating member for closing both ends of a glass tube enclosing a fuse element. The fuse body is composed of a fuse case and an outer case that accommodates the fuse body, and the fuse body is provided with inner plugs that cover the connection portions of the connection sleeve and the glass tube end at both ends of the glass tube, The case is composed of a cylindrical outer case main body and caps attached to both ends of the outer case main body, and is provided with engagement means on both ends and the cap of the outer case main body, and is detachable. A through hole for inserting a connection sleeve is provided, the fuse body is accommodated in the outer case body, and the connection sleeve of the fuse body accommodated in the outer case body is keyed. When the cap is attached to the outer case main body by inserting the packing between the outer case main body and the cap, and the cap through hole and the sleeve, the container can be removed from the outer case at the time of disposal. A configuration was adopted in which the fuse body contained by removing the cap could be taken out and separated from the outer case.

By adopting such a configuration, the case is waterproofed by providing a packing between the outer case main body, the cap, the through hole of the cap, and the sleeve. In addition, an internal plug is attached to the fuse body to prevent moisture and water from entering the glass tube of the fuse body, and the connection sleeve connected to the connection terminal of the fuse element is held to improve the strength. This prevents the waterproof performance from being lowered and the holding force to the connection sleeve from being lowered due to the case body and the cap being detachable.
In this way, the fuse body and the outer case can be separated after removing the cap after using it in the same manner as before.

  At this time, it is possible to adopt a configuration in which the engaging means is formed by forming a male screw on one of the outer case and the cap and forming a female screw on the other, and connecting both with a screw.

  By adopting such a configuration, the cap can be removed by turning in the direction of releasing the screw. Therefore, the fuse body can be removed by removing the cap without using a tool or with a simple tool such as a wrench, so that it can be easily separated from the outer case. Further, at the time of assembly, sufficient waterproof performance can be obtained by tightening the screws so as to crush the packing between the outer case main body and the cap.

  Moreover, the structure which provided the compression part of the connection terminal and sleeve of the said fuse body from the inner plug with the allowance for cutting | disconnection can be employ | adopted.

  By adopting such a configuration, it is possible to cut at the time of the inner plug by providing a compression position of the connection terminal and the connection sleeve with a cutting margin from the inner plug. At this time, since the cutting allowance is not compressed, the terminal of the fuse body can be easily removed from the connection sleeve. For this reason, the length which can separate a fuse main body (copper) can be lengthened.

  Further, at this time, when the connection sleeve of the fuse body accommodated in the case body is inserted into the case body through the through hole of the cap, the fixing sleeve is inserted through a fixing packing that fills the gap between the inner plug and the back surface of the cap. A configuration in which a cap is attached can be employed.

  By adopting such a configuration, when a tensile force is applied to the connection sleeve, the fixing packing is pushed by the inner plug and hits the inside of the cap, and the cap receives the tensile force. By doing so, for example, even if the electric wire connected to the connection sleeve is shaken or pulled, the force is received by the outer case and the fuse body can be prevented from receiving, so the tensile strength of the electric wire fuse can be increased. Can be improved.

  By configuring the present invention as described above, it is possible to collect and collect the electric wire fuses.

Exploded perspective view of the embodiment (A) Sectional view of the assembled state of FIG. 1, (b) Partial enlarged view of (a) Partial enlarged view of the fuse body (A) Action explanatory drawing of Example 1, (b) Action explanatory drawing which shows the other aspect of (a) Cross section of conventional example

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
As shown in FIG. 1, the electric wire fuse of the present invention includes a fuse body 1 and an outer case 2, and is assembled using waterproof packings 20 a and 20 b and a fixing packing 21.

The fuse body 1 is formed by enclosing a fuse element 3 in a glass tube 4, and has a shape in which connection sleeves 7 protrude from both ends of the glass tube 4.
That is, as shown in FIG. 2A, the fuse body 1 is connected to the connection terminal 6 of the fuse element 3 that protrudes from both ends of the glass tube 4 through a heat insulating member (for example, silicon rubber) 5 for closing. The connection sleeve 7 for connecting to the electric wire 13 is attached by compression (caulking), and a cylindrical inner plug 22 is attached.
Here, the cylindrical inner plug 22 is made of, for example, polycarbonate, and is attached so as to cover the connection sleeve 7 and the peripheral edge 23 of the end portion of the glass tube 4 as shown in FIG. To be sealed. This prevents moisture (water) from entering the glass tube 4 (waterproofing), holds the connection sleeve 7, and has a holding force for making the cap 31 detachable as described later. Ensure a decline.

  As shown in FIG. 2A, the connection sleeve 7 has a cylindrical shape, and is provided with an insertion port 24a for the connection terminal 6 of the fuse element 3 on one side and an insertion port 24b for the electric wire 13 on the other side. By separating the ports 24a and 24b by the partition wall 25, water intrusion through the insertion port 24a is prevented. Further, the outer periphery of the insertion port 24a on one side of the connection sleeve 7 (connection terminal 6 side) is formed in a skirt-like shape as shown in FIG. And is held firmly.

  In this connection sleeve 7, the connection terminal 6 of the fuse element 3 is inserted into one insertion port 24 a, and as shown in FIG. 3, a cutting allowance 26 is provided from the inner plug 22, and a terminal-side compression (crimping) portion 19 is provided. Thus, as will be described later, the separation length of the fuse element (copper) can be increased (the separation amount can be increased) during recycling.

As shown in FIG. 1, the outer case 2 includes an outer case body 30 and two caps 31. The outer case body 30 has a cylindrical shape and an inner diameter that is large enough to accommodate the fuse body 1. Male screws 33a are formed as engaging means 33 at both ends of the case body.
The male screw 33a is formed on the outer periphery of the case body 30 from the case end toward the center, and a hook-shaped stopper 34 is provided at the end of the screw as shown in FIG.
The cap 31 has a bell shape, and is formed with a protruding portion 37 provided with a through hole 36 through which the connection sleeve 7 is inserted. The cap 31 is formed with a female screw 33b as an engaging means 33 inside the opening, and is screwed into the male screw 33a at the end of the outer case main body 30 for attachment. As shown in FIG. 2B, a coupling portion 38 with a thickened opening edge is formed in the opening of the cap 31, and the coupling portion 38 comes into contact with the stopper 34 of the outer case body 30. ing.

The waterproof packings 20a and 20b are formed of, for example, rubber, silicon rubber, or soft resin. The packing 20a used for the through hole 36 of the protruding portion 37 of the cap 31 and the packing 20b used for the coupling portion 38 are used. Use two types of packing with different sizes.
The packings 20a and 20b can also be O-rings. Here, the packing 20a for the through hole 36 is compressed by using a wide washer-like one shown in FIG. Even if it is not crushed, it can be sealed simply by fitting in the gap between the through hole 36 and the connection sleeve 7.
In this embodiment, the fixing packing 21 is made of rubber, silicon rubber, soft resin or the like in a conical shape as shown in FIG.
The fixing packing 21 has a shape and size that fills a gap formed between the inside of the cap 31 attached to the outer case body 30 and the inner plug 22 of the fuse body 1 accommodated in the outer case body 30. The gap is filled and integrated with the cap 31 to improve the strength.
Further, the conical packing 21 is provided with a through hole 40 penetrating the shaft, and the connection sleeve 7 is inserted into the through hole 40.
In this way, for example, when the connection sleeve 7 connected to the electric wire 13 receives a tensile force, the fixing packing 21 is pushed by the inner plug 22 and hits the inside of the cap 31. Therefore, the fuse body 1 accommodated in the outer case 2 is not directly subjected to a pulling force and can prevent the fuse body 1 from being damaged, so that the tensile strength of the entire wire fuse can be improved.

This embodiment is configured as described above, and the electric wire fuse of the present invention inserts the fuse main body 1 into the outer case main body 30, and the male screw 33 a that is the engaging means 33 at both ends of the outer case main body 30. Each is fitted with a waterproof packing 20b.
Next, the fixing packing 21 is inserted and fitted into the connection sleeve 7 protruding from the fuse body 1 inserted into the outer case body 30. Then, after inserting and fitting the through-hole 36 of the cap 31 into the connection sleeve 7 fitted with the fixing packing 21, the female screw 33 b of the cap 31 and the male screw 33 a of the outer case body 30 are screwed together. Tighten until the coupling portion 38 of the cap 31 comes into contact with the stopper 34 of the outer case body 30 and stops.
By tightening in this way, the waterproof packing 20b can be compressed and sealed. In addition, by compressing the waterproof packing 20b as described above, an effect of preventing the cap 31 from being loosened by the extension force can be expected.
Finally, the waterproof packing 20a is fitted into the gap between the connection sleeve 7 protruding from the protruding portion 37 of the cap 31 and the through hole 36, and the process is completed.

The wire fuse assembled in this way is compressed by inserting the wire 13 from the secondary side of the pole transformer into one side of the connection sleeve 7 and compressing the other side of the connection sleeve 7 to the customer's entrance. The secondary side of the pole transformer and the customer are connected by inserting and compressing the electric wire 13 to be connected. Then, the terminal cover 12 is attached (of course, the terminal cover 12 is inserted through the electric wire 13 in advance).
At this time, the electric wire fuse is pulled, but the pulling force is the connecting sleeve 7 to which the electric wire 13 is connected → the fixing packing 21 → the cap 31 → the outer case body 30 → the opposing cap 31 → the fixing packing 21 → the connection. Since it is transmitted from the sleeve 7 to the electric wire 13 and transmitted from the secondary side to the drawing port or from the drawing port to the secondary side, the pulling force is not applied to the fuse body 1 accommodated in the outer case 30. Therefore, the fuse body 1 is not broken.
In addition, the fuse main body 1 is not broken because the fixing packing 21 hits the cap 31 and the fuse main body 1 moves integrally with the outer case 30 even with respect to shaking.

  Since the electric wire fuse connected in this way is arranged in the vicinity of the outdoor pole transformer, it is exposed to wind and rain, but is sealed by the waterproof packing 20a, b and the inner plug 22, so that Can be used in the same way as

On the other hand, when discarding the wire 13 by replacing it, for example, a cable cutter or the like is used to cut the vicinity of a and b 'in FIG. Next, when the cap 31 of the electric wire fuse is turned in the loosening direction, the engagement between the cap 31 and the outer case main body 30 is released, and the cap 31 is removed, so that the cap 31 is removed from the connection sleeve 7. Next, when the connection sleeve 7 exposed by removing the cap 31 is pulled out, the outer case 30 and the fuse body 1 are easily separated.
The extracted fuse body 1 can be divided into a fuse element (copper) 1 and a connection sleeve (other alloy) 7 by cutting the cutting allowance 26 of FIG. 3 with a cable cutter or the like.
At this time, since the cutting allowance 26 is not compressed, the terminal 6 of the fuse body 1 can be easily removed from the connection sleeve 7.
Further, at this time, by providing the cutting allowance 26 on the inner side (inner plug side) of the compression portion 19, the length that can be separated can be increased (a large amount).
Thus, the sorted fuse body 1 is provided with the inner plug 22, the heat insulating member 5, the glass tube 4, and the like, which can be removed with a simple tool such as pliers.
In this way, since the electric wire fuse can be separated using a simple tool, no large-scale equipment is required and the separation can be easily performed. Therefore, separation can be performed at low cost (even when the number of processing is small).

The first embodiment shows another aspect of the engaging means 33 between the cap 31 and the outer case main body 30.
In FIG. 4A, contrary to FIG. 1, a male screw 33 a is formed on the cap, and a female screw 33 b is formed on the outer case body 30.
4B, in place of the male screw 33a and the female screw b of the embodiment, a recess 50 is provided on the inner periphery of the cap 31, and a protrusion 51 is provided on the outer periphery of the end portion of the outer case body 30. The recess 50 and the protrusion 51 are fitted by pushing the cap 31 into the outer case main body 30, and are detachably attached. By doing in this way, workability | operativity at the time of an assembly can be improved.

DESCRIPTION OF SYMBOLS 1 Fuse body 2 Outer case 3 Fuse element 4 Glass tube 6 Connection terminal 7 Connection sleeve 19 Compression part 20a Waterproof packing 20b Waterproof packing 21 Fixing packing 22 Inner plug 26 Cutting allowance 30 Outer case body 31 Cap 33 Engaging means 33a Male thread 33b Female thread 36 Through hole

Claims (3)

Connecting sleeve (7) for connecting the electric wire (13) to the connecting terminal (6) protruding through the heat insulating member (5) for closing both ends of the glass tube (4) enclosing the fuse element (3 ) A fuse body (1) that is compressed and attached, and an outer case (2) that houses the fuse body (1) ,
The fuse body (1) is attached to both ends of the glass tube (4) with a connection sleeve (7) and an inner plug (22) covering the connection portion of the glass tube end,
On the other hand, the outer casing (2) is made from a cylindrical outer housing main body (30) and cap (31) attached to both ends of the outer casing body (30), and both end portions of the outer casing body (30) Cap (31) is provided with an engaging means (33) to be detachable, and the cap (31 ) is provided with a through hole (36) for inserting the connection sleeve (7) ,
The accommodating the fuse body (1) out of the case body (30), the through hole of the cap to the connecting sleeve (7) of the housing fuse body to the outer housing main body (30) (1) (31) (36) by inserting in, when mounting the cap (31) to the outer housing main body (30), through holes (36) and the sleeve (7) of the outer housing main body (30) and cap (31) and cap (31) between the by mounting the packings (20a, 20b), at the time of disposal, the outer case and the outer case (2) to release the cap (31) is accommodated by removing the fuse body (1) (2) in wire fuse that enables the separation,
An electric wire fuse in which the compression portion (19) of the sleeve (7) is provided with a cutting margin (26) from the inner plug (22). The engaging means (33) is formed by forming a male screw (33a) on one of the outer case (2) and the cap (31 ) and forming a female screw (33b) on the other, and coupling the two with screws. The electric wire fuse according to claim 1 made. When the connection sleeve (7) of the fuse body (1) accommodated in the outer case body (30) is inserted into the through hole (36) of the cap (31) and attached to the outer case body (30), the inner plug The electric wire fuse according to claim 1 or 2, wherein the cap (31) is attached via a fixing packing (21) that fills a gap between the back surface of the cap (31) and the cap (31) .

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