JPH0714518U - Base metal fitting for insulator and pin fixing structure and insulator - Google Patents

Abstract

(57) [Abstract] [Purpose] Insulator base metal fitting 1 in which there is a slight risk of the rust-preventive plating peeling off due to caulking for fixing.
A fixed structure of 0 and pin 50 is provided. [Structure] An outwardly projecting ridge 40 is provided on the periphery of a through hole 14 formed at the center of the bottom of an insulator base fitting 10. A circumferential groove 52 is provided under the neck of the pin 50. The cross section of the groove 52 has a U shape or a U shape having a deep circular arc on the head 54 side, which is vertically divided into two parts. Then, the pin 50 is inserted into the through hole 14 and the protrusion 40 is caulked to be plastically deformed,
The inner peripheral surface of the ridge 40, that is, the inner peripheral surface of the through hole 14 is formed into the groove 5
It is inserted into 2 by protruding along an arcuate surface. Thus, the pin 50 is fixed to the insulator base metal member 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for fixing a base metal fitting for an insulator and a pin, and an insulator using this structure.

[0002]

[Prior art]

 FIGS. 4A and 4B show a conventional fixing structure of a base metal member for an insulator and a pin. In the structure shown in FIG. 4A, a through hole 14 having a diameter larger than the screw diameter of the pin 12 is formed at the center of the bottom of the insulator base metal fitting 10, and the pin 12 has a larger diameter than the screw diameter and is smaller than the through hole 14 at the lower neck. A thick portion 16 having a diameter is provided. Then, the pin 12 is inserted into the insulator base metal fitting 10 from the inside, positioned by the head portion 18, and the thick portion 16 is caulked from the outside by an appropriate jig to plastically deform in the arrow F direction to form an enlarged portion, The periphery of the through hole 14 of the insulator base metal fitting 10 is clamped by the plastic deformed enlarged portion 20 and the head portion 18, and the pin 12 is fixed to the insulator base metal fitting 10.

Further, in the structure shown in FIG. 4B, a through hole 14 is formed in the center of the bottom of the base metal member 10 for an insulator, and the pin 30 does not have an enormous head, but is located on the head side in the middle part. The enlarged portion 32 is provided at a biased position. Then, the pin 30 is inserted into the insulator base metal fitting 10 from the outside, positioned at the enlarged portion 32, the head is caulked from the inside with an appropriate jig, and plastically deformed in the arrow F direction to form the enlarged portion. The peripheral edge of the through hole 14 of the insulator base metal fitting 10 is sandwiched between the plastically deformed expanded portion 34 and the expanded portion 32, and the insulator base metal tool 10 and the pin 30 are fixed.

[0004]

[Problems to be solved by the device]

 In the above-described conventional fixing structure for the base metal member for the insulator and the pin, the pins 12 and 30 are largely plastically deformed in the crimping step for fixing. If rust-preventive plating is applied before fixing, the caulking process causes the plating to peel off over a large area. Therefore, rust prevention plating must be applied after fixing.

However, the fixed base metal member and pin for the insulator have a complicated shape and a large size as a whole, and it is difficult to perform rust-preventive plating with a uniform thickness, and the weight is large. The work was difficult because it was difficult to handle.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a fixing structure for a base metal fitting for an insulator and a pin, in which a component coated with an anticorrosion plating can be fixed by caulking, Moreover, it aims at providing the insulator using this fixing structure.

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, the fixing structure of the insulator base metal fitting and the pin of the present invention is such that an outwardly projecting ridge is provided on the periphery of a through hole formed in the center of the bottom of the insulator base metal fitting. A groove is formed in the lower part of the neck of the pin that is inserted into the through hole, either circumferentially or partially in the circumferential direction, and the projection is caulked to cause plastic deformation so that the pin is inserted over the entire circumference or partially of the groove. The pin is fixed to the insulator base metal member.

Further, the cross section of the groove may be formed in a U shape or a shape in which a U shape having a deep arc on the head side of the pin is vertically divided into two.

In addition, the insulator of the present invention is such that a ridge is formed on the periphery of the through hole formed in the center of the bottom of the base metal member for the insulator, and a ridge is provided outwardly so that the pin that is inserted into the through hole has a full circumference under the neck. A groove in a circular shape or in the circumferential direction, and caulking the ridge to plastically deform it so that the groove is fully or partially inserted and fixed to the insulator base metal member, and the pin is fixed to the insulator base metal member. One end of the insulator main body is inserted into the insulator base metal member, and the insulator base metal member and the insulator main body are fixed to each other with cement.

[0010]

[Work]

 According to the first aspect of the present invention, since the protrusion provided on the peripheral edge of the through hole is plastically deformed by caulking and is inserted into the circumferential groove of the pin so as to be fixed, the protrusion can be easily formed when caulking. There are few parts that are plastically deformed. Therefore, the peeling of the rust-preventive plating is small in the range of plastic deformation. When applying a rust preventive agent to a part where the rust preventive plating has been peeled off by caulking, the area to be applied is narrow and the work is easy.

According to a second aspect of the present invention, the inner peripheral surface of the ridge, that is, the center of the inner peripheral surface of the through hole projects into the groove by caulking and is plastically deformed along the arc-shaped surface of the groove. . Therefore, the plastically deformed shape of the inner peripheral surface of the through hole comes into close contact with the arcuate surface of the groove, and the pin does not rattle against the base metal fitting for the insulator. In particular, with respect to the force in the direction of moving the pin to the inside of the insulator base metal fitting, the plastically deformed portion abuts the entire arcuate surface of the groove and is firmly fixed.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a partially cutaway vertical sectional view of an insulator base metal fitting and pin fixing structure of the present invention and an insulator using this structure. FIG. 2 (a) is an insulator base metal fitting of FIG. FIG. 2B is an enlarged cross-sectional view of an essential part showing the structure before the pin is caulked, and FIG. 2B is an enlarged cross-sectional view of the essential part showing the structure after the pin and the base metal for insulator of FIG. 1 are caulked.

In FIG. 1 and FIG. 2, a circumferential ridge 40 is provided toward the outside at the peripheral edge of the through hole 14 formed in the center of the bottom of the insulator base metal fitting 10. The ridge 40 may be formed by engraving an outer peripheral groove 42 having a U-shaped or V-shaped cross section on the outer peripheral portion thereof, but the U-shaped outer peripheral groove 42 is pressed on the outer peripheral portion. The protrusion 40 may be formed so as to be raised by being plastically deformed by being formed by processing or the like. The height t ₁ of the protrusion 40 is preferably equal to or larger than the width t _{2 of the} circumferential groove 52 provided in the lower neck of the pin 50 described later.

The pin 50 has a screw diameter that allows it to be inserted into the through hole 14 without rattling, and a circumferential groove 52 is formed in the lower portion of the neck of a head 54 provided at one end. The cross section of the groove 52 has a shape in which a U-shape having a deep arc on the head 54 side is vertically divided into two equal parts. The bottom of the groove 52 may be an arcuate surface and may be continuous with the edge of the groove 52 opposite to the head 54.

Then, as shown in FIG. 2 (a), the pin 50 is inserted from the inside into the through hole 14 of the insulator base metal fitting 10 and positioned with the head 54, from the outside of the insulator base metal fitting 10. The ridge 40 is crimped by an appropriate jig and is plastically deformed in the direction of the arrow F, and the center of the inner peripheral surface of the ridge 40, that is, the inner peripheral surface of the through hole 14 projects into the groove 52, and the arc of the groove 52 is formed. The projection 40 is crushed by being plastically deformed along the surface, and the structure as shown in FIG. 2B is obtained. In the step of crimping the ridges 40, the entire circumference may be crushed at once with a jig, but it may be divided in the circumferential direction and crushed sequentially in a plurality of steps.

In the structure shown in FIG. 2B, the inner diameter of the through hole 14 is narrowed to surround the bottom portion of the groove 52, and the shape of the inner peripheral end portion is along the arcuate surface of the groove 52. Become. Therefore, the pin 50 is firmly fixed to the insulator base metal member 10. Moreover, since the shape of the inner peripheral end of the through hole 14 is in contact with the arcuate surface of the groove 52 against the force in the direction of moving the pin 50 to the inside of the insulator base metal fitting 10, the inner peripheral end is The entire part will face each other, and will not easily slip off or come off.

Here, the portion that is plastically deformed by caulking is only the ridge 40, which is extremely small compared to the conventional structure shown in FIG. Therefore, before fixing, the base metal fitting 10 for the insulator and the pin 50 can be separately pre-corrosion plated. It should be noted that the portion of the ridge 40 that is plastically deformed may be coated with a simple rust preventive agent or the like after fixing, if necessary.

Then, as described above, the base portion of the insulator main body 60 is inserted into the insulator base metal member 10 to which the pin 50 is fixed, and is fixed by cement 62 or the like to form an insulator. Zinc oxide elements 64, 64 are built in the insulator main body 60, and are appropriately sealed with a conductive metal plate 66.

In such an insulator, since the pin 50 does not move inside the insulator base metal member 10, even if the insulator is dropped and an impact force is applied to the pin 50, the zinc oxide element incorporated therein. 64, 64, etc. are not damaged.

3A, 3B, and 3C show different shapes of the groove 52 of the pin 50 used in the present invention. The groove 52 shown in FIG. 3A has a U-shaped cross section, the groove 52 shown in FIG. 3B has a deep taper shape on the head 54 side, and the groove 52 shown in FIG. It has a letter shape. Regardless of the shape of the groove 52, the pin 50 can be fixed to the insulator base metal member 10 by appropriately plastically deforming the protrusion 40 to protrude into the groove 52.

Of course, the insulator body 60 may be a solid insulator. Further, in the description of the above-mentioned embodiments, the groove 52 provided in the lower part of the neck of the pin 50 is described as having the entire circumference, but the present invention is not limited to this, and the groove 52 is partially provided in the circumferential direction. You may be taken. Then, the ridge 40 is projected and inserted around the entire circumference of the circumferential groove 52 by caulking, but it may be partially projected and inserted in the groove 52 in the circumferential direction. Furthermore, the protrusion 40 is not limited to being provided over the entire circumference of the peripheral edge of the through hole 14, and may be provided partially. Moreover, the crimping of the protrusion 40 may be performed in either one step or a plurality of steps.

[0022]

[Effect of device]

 As described above, since the insulator base metal fitting and the pin fixing structure and the insulator of the present invention are configured, the following special effects are achieved.

In the structure for fixing the insulator base metal member and the pin according to claim 1, the portion which is plastically deformed by caulking is small compared to the conventional one, and the caulking prevents rust. There are few areas where the plating may peel off, and rust-preventive plating can be performed before fixing. Therefore, in the fixing structure of the present invention, rust-preventive plating can be easily applied with a uniform thickness, and the handling is easy, which is suitable for mass production. Even if the rust preventive coating is applied to the part where the rust preventive plating has been peeled off by caulking, the area to which the rust preventive agent should be applied is narrow and the work is easy.

Further, in the fixing structure of the insulator base metal member and the pin according to claim 2, the crimped and plastically deformed ridge is deformed along the arc-shaped circle of the groove and brought into close contact. It Therefore, the entire inner peripheral end of the through hole is opposed to the force in the direction in which the pin moves to the inside of the insulator base metal member, and the pin does not rattle and move.

Further, in the insulator according to claim 3, since the fixing of the insulator base metal member and the pin is suitable for mass production, the insulator as a whole is suitable for mass production as compared with the conventional insulator. is there.

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical sectional view of a base metal fitting for an insulator and a pin fixing structure of the present invention and an insulator using this structure.

2 (a) is an enlarged cross-sectional view of an essential part showing the structure before caulking the insulator base metal fitting and the pin of FIG. 1. FIG.
FIG. 2 is an enlarged sectional view of an essential part showing a structure after the insulator base metal fitting and the pin of FIG. 1 are crimped.

3 (a), (b) and (c) are views showing another shape of the groove of the pin used in the present invention.

4 (a) and 4 (b) are vertical sectional views showing a conventional fixing structure of an insulator base metal member and a pin, respectively.

[Explanation of symbols]

 10 Base Metal for Insulator 14 Through Hole 40 Ridge 50 Pin 52 Groove 60 Insulator Main Body 62 Cement

Claims (3)

[Scope of utility model registration request] 1. A ridge extending outwardly is provided on the periphery of a through hole formed in the center of the bottom of an insulator base metal member, and a pin extending through the through hole is provided at the lower part of the neck with a circumferential or circumferential direction. An insulator base, wherein a groove is partially provided, and the protrusion is caulked and plastically deformed to be inserted into the entire circumference of the groove or partially inserted to fix the pin to the insulator base metal fitting. Fixing structure of metal fittings and pins. 2. The structure for fixing a base metal fitting for an insulator and a pin according to claim 1, wherein a cross section of the groove is a U shape or a U shape having a deep arc on the head side of the pin is vertically divided into two parts. The structure for fixing the base metal fittings for the insulator and the pin, which is characterized in that 3. A ridge is formed on the periphery of a through hole formed in the center of the bottom of the insulator base metal fitting so as to extend outward, and a pin extending through the through hole is provided at the lower part of the neck with a circumferential or circumferential direction. A groove is partially provided, and the ridge is caulked and plastically deformed so as to be inserted into the entire circumference of the groove or partially inserted to fix the pin to the insulator base metal fitting, and the insulator base insulator metal insulator. An insulator characterized in that one end of a main body is inserted and the insulator base metal member and the insulator main body are fixed to each other with cement.