JPS585302Y2 - Structure to prevent the lower lead wire from falling off in a cylindrical cut-out switch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure for preventing the lower sunrise wire from being pulled out in a cylindrical cut-out switch.

Generally, the lower part of the wire drawn out from the cylindrical insulator is integrally molded inside the mold cone.
Conventionally, this molded cone was simply fixed by adhesive to the insulator.

In such conventional devices, the mold cone detaches from the insulator during use because the adhesive used to bond the mold cone to the insulator is sensitive to temperature changes and has poor weather resistance. There is a defect that the lead wire also comes off from the insulator, and the strength of the adhesive is limited, so it can be forced out.) If you hold the lower Hiji wire when carrying the switch, the molded cone and insulator may fall apart. There was also a defect in that the adhesive between the wire and the wire would peel off, causing the Hijiden wire to be pulled out.

The purpose of the present invention is to eliminate the defects existing in the above-mentioned prior art, and to provide a cylindrical cut-out switch that can reliably prevent the Hiji wire from being pulled out despite its simple structure. The purpose is to provide a structure that prevents extraction.

An embodiment of the present invention will be described below with reference to the drawings. In the drawing, 1 is a cylindrical insulator, and a through hole 3 is provided in the center of a recess 2 provided on one side of the lower part of the insulator.

Numeral 4 is a bolt inserted from the outside into the through hole 3, which has an insertion hole 5 inside and a locking portion 6 provided at the outer end that locks into the stepped portion of the bottom surface of the recess 2.

7 is a nut that is screwed onto the inner end of the bolt 4 through a washer 8, and the bolt 4 is fixed to the insulator 1, and the bolt 4 is also screwed into the insulator 1. It constitutes a metal fitting 9.

Therefore, the removal stopper 9 locks the washer 8 and the locking portion 6 on the inside and outside of the insulator 1, respectively, and is fastened and fixed by the nut 7.

Reference numeral 10 denotes a mold cone adhesively fixed to the cylindrical insulator 1 on the outer periphery of the removal stopper 9, which passes through the center and integrally molds the lower sunrise wire 11.

Reference numeral 12 denotes a core wire within the lower marking line 11, which passes through the insertion hole 5 of the stopper 9 and is caulked 13 inside the insertion hole 5.

Note that the inner end of the core wire 12 in the lower Hiji wire 11 is connected to the crimp terminal 1.
Lower fixed electrode 15 through 4? This is connected.

Now, in order to attach the lower outlet wire 11 to the cylindrical insulator 1 of the cylindrical power cut-out switch configured as described above, first the lower outlet wire 11 molded in the mold cone 10 is attached. Install the core wire 12 through the insertion hole 5 of the bolt 4.
The terminal 14 is crimped and fixed to the tip of the core wire 12, and then the inner length of the core wire 12 is adjusted appropriately, and the coaxial wire 12 and the bolt 4 are caulked 13.

Next, the core wire 12 is caulked 13, and the bolt 4 is inserted from the outside of the through hole 3 of the insulator 1, and the locking part 6 is inserted into the through hole 3.
The nut 7 (with the core wire 12 inserted through it) is inserted into the inner end of the bolt 4 and the washer 8
Screw together through.

Then, the locking portion 6 and the washer 8 of the removal stopper 9 are respectively locked on the outside and inside of the cylindrical insulator 1, and the nut 7 is firmly fastened to the insulator 1.

Finally, the terminal 14 of the core wire 12 is attached to the lower fixed electrode 15, and the molded cone 10 is adhesively fixed to the surface of the insulator 1.

In this way, the lower lead wire 11 is not fixed to the cylindrical insulator 1 through the mold cone 10 only by adhesion, but is also fixed through the core wire 12 (through the pull-out stopper 9). Therefore, the attachment of the lead wire 11 to the insulator 1 becomes very strong, and even if the adhesive part of the stress cone 10 comes off, the lower lead wire 11 will still be fixed to the insulator 1 by the core wire 12. No one will be selected from the first insulator.

In addition, the Hiji wire 11 is attached to the core wire 1 with respect to the removal stopper 9.
Since the cutout switch is fixed by attaching the cutout switch 2 and no other member is involved, the structure of the cutout stop is simple, and the manufacturing cost of the entire cutout switch is reduced.

Note that as a means for attaching the core wire 12 to the pull-out stopper 9, it would be ideal to use a kogashime attachment 13 (as shown in this embodiment) because the work would be simple and the attachment would be strong; Means such as welding may also be used.

Further, the present invention can also be embodied in the following manner.

(B) As shown in Figure 4a, the insertion hole 5 of the removal stopper 9
Corresponding parts of the washer 8 can be expanded outward in the axial direction to form a pair of widened parts 16, or a part of the hole in the washer 8 can be cut out outward as shown in b. U groove 17
Or, as shown in c4, the hole in the washer 8 is provided with an expanded portion 16 similar to the expanded portion 16 in a.

In this way, even if the core wire 12 is made thicker and the terminal 14 is made larger as the current capacity of the cutout switch increases, the terminal 14 can be easily inserted through the bolt 4 and washer 8.

That is, for installation, the side part of the terminal 14 can be inserted into the expanded part 16 for the bolt 4 and the washer 8 shown in C.
The washer 8 of b is shaped so that it can be inserted from the open part of the U-groove 17.

As described in detail above, the present invention is such that the core wire 12 of the lower lead wire 11 is passed through and fixed to the stopper 9, and the coaxial wire 1
By attaching the inner end of 2 to the lower fixed electrode 15 inside the cylindrical insulator 1, the number of parts is reduced, the structure is simple, and the manufacturing cost can be reduced. However, the cylindrical cut-out switch is effective because it can reliably prevent the Hiji wire from being pulled out, and the number of contact parts is reduced, which reduces contact resistance and makes maintenance and inspection easier. This is a practically preferable design as a stopper structure for the lower part of the Hiji wire.

[Brief explanation of the drawing]

Figure 1 is a front view of a cylindrical cut-out switch that embodies the present invention, Figure 2 is an enlarged sectional view of the main part, Figure 3 is a partially enlarged sectional view of Figure 2, and Figure 4 a shows the installation. 1 is a cross-sectional view showing another example of the bolt, and b and c are perspective views showing other examples of the washer 8.

Claims (1)

[Scope of utility model registration request] The lower part of the cylindrical insulator 1 is provided with a through hole 3 that passes through the inside and outside of the insulator, and a removal stopper 9 is tightened and fixed in the through hole 3. A hole 5 is provided,
The core wire 12 of the lower lead wire 11, which is inserted into the insertion hole 5 through the molded cone 10 which is arranged and fixed on the outside of the cylindrical insulator 1 corresponding to the through hole 3, is caulked to the removal stopper 9. The inner end of the concentric wire 12 is attached to the lower fixed electrode 15 (in the cylindrical insulator 1).