JP4012611B2 - Insulator with reinforced plastic core and method for producing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an insulator having a reinforced plastic as a core and a method for manufacturing the insulator.
[0002]
[Prior art]
In general, an insulator having a core made of reinforced plastic is known as a so-called polymer insulator or plastic insulator, and as one type thereof, for example, as shown in Japanese Patent Publication No. 7-507733, a predetermined interval is maintained. A core body composed of a pair of connecting fittings and bundled yarns reinforced with a synthetic resin wound along an annular groove provided on the outer periphery of these connecting fittings and hooked endlessly; There are also insulators of the type provided with an insulating covering made of a resilient material covering the outer periphery of the concentric body.
[0003]
This type of reinforced plastic core (hereinafter sometimes referred to as polymer insulator) has high tensile strength and is superior in impact resistance and light weight compared to porcelain insulators. There is an advantage that it is excellent in handling such as mounting work.
[0004]
However, in the polymer insulator shown in the above-mentioned publication, the torsional strength and bending strength are not always sufficient, and the polymer insulator to deal with this is described in US Pat. No. 5,374,780 and the drawings. It is shown. In the polymer insulator, the torsional strength of the polymer insulator is obtained by forming the core body by winding the yarn around the entire outer periphery of the above-described core material in a substantially orthogonal shape to increase the torsional strength and bending strength of the core body. , And increase the bending strength.
[0005]
[Problems to be solved by the invention]
By the way, in the insulator shown in the above-mentioned U.S. patent specification and drawings, in order to constitute the core body as described above, it is endless along the outer periphery of a pair of connecting fittings that are positioned at a predetermined interval. The whole outer periphery of the wound bundle-like yarn is wound with a core material impregnated with a synthetic resin. For this reason, when the work for forming the core is performed manually, there is a problem that a complicated work is required and the work time is increased, and the work for forming the core is mechanically performed. However, there is a problem that a device for winding the yarn around the entire outer periphery of the core member has to be introduced.
[0006]
Accordingly, an object of the present invention is to eliminate these problems in polymer insulators of the type described above.
[0007]
[Means for Solving the Problems]
The present invention relates to an insulator having a reinforced plastic as a core and a method for manufacturing the same.
[0008]
Thus, the first insulator having the reinforced plastic core according to the present invention is wound along a pair of connecting fittings positioned at a predetermined interval and an annular groove provided on the outer periphery of these connecting fittings. A core body formed by connecting a pair of core materials composed of bundled yarns reinforced with a synthetic resin hooked endlessly, and an insulating material made of an elastic material covering the outer periphery of the core body It is an insulator having a core made of reinforced plastic provided with a covering, and each of the core members is folded in two in a state of being hooked to each other at an intermediate portion in the longitudinal direction and connected in the longitudinal direction. It is characterized by.
[0009]
Further, the second insulator having the reinforced plastic core according to the present invention is wound endlessly by being wound along a pair of connecting fittings positioned at a predetermined interval and an annular groove provided on the outer periphery of the connecting fittings. Wound around a plurality of strips along a first core member made of a bundle of yarn reinforced with a synthetic resin hooked in a shape, and one annular ring provided on the outer periphery of the coupling bracket A core body formed by connecting a second core material composed of a bundle of yarns reinforced with a synthetic resin that is rotated and endlessly hooked together, and elasticity that covers the outer periphery of the core body Insulators having an insulating coating made of the above material and having a core made of reinforced plastic, the first core material is two in a state of being hooked to the second core material in the middle portion in the longitudinal direction. It is bent and is connected in the longitudinal direction.
[0010]
In these insulators having a reinforced plastic core according to the present invention, the outer periphery of at least one of the hooking portions on which the two core members are hooked to each other is wound with a yarn reinforced with a synthetic resin. The movement of the hooking portions of the two core members can be regulated, and the two core members are connected to each other via a ring-shaped yarn formed by reinforcement with synthetic resin. The structure which is made can be taken.
[0011]
Further, in the first insulator manufacturing method using the reinforced plastic as a core body according to the present invention, the two core materials are folded into two in a state where they are hooked to each other at the intermediate portion between the two core materials. It connects to a direction, and this connection state is hold | maintained and the outer periphery of the said both core materials is coat | covered with the insulation coating body which consists of a resilient material.
[0012]
Or the manufacturing method of the 2nd insulator which makes the reinforced plastic the core which concerns on this invention inserts said 1st core material between the thread | yarns of said 2nd core material, The 2nd core material It is folded in two in a state of being hooked on the wire, and is connected in the longitudinal direction, and the outer periphery of both the core members is covered with an insulating covering made of a resilient material while maintaining this connected state. Is.
[0013]
[Operation and effect of the invention]
In the first insulator (first polymer insulator) having the reinforced plastic core according to the present invention as a core, the core is wound endlessly along the outer periphery of a pair of connecting fittings positioned at a predetermined interval. It is composed of a first core material and a second core material made of bundle-like yarns reinforced with a rotated synthetic resin, and these two core materials are hooked to each other at an intermediate portion thereof. It is configured to be bent into two and connected in the longitudinal direction.
[0014]
For this reason, in the first polymer insulator, the plurality of yarn portions formed by bending the bundle-like yarns constituting the core body maintain a circumferential interval in the insulating coating. Compared to a structure in which a single bundle of yarn is located in the center and extends in the longitudinal direction, and the twisting strength of the polymer insulator, and High bending strength.
[0015]
Therefore, in the first polymer insulator, there is no need to increase the torsional strength and bending strength of the core body by winding the thread around the entire outer periphery of the core material in a substantially orthogonal shape to increase the torsional strength and bending strength of the core body. Troublesome work resulting from the adoption of the means and / or the introduction of a new device can be eliminated. Moreover, the said 1st polymer insulator can be easily manufactured with the manufacturing method of the 1st polymer insulator which concerns on this invention.
[0016]
In the second insulator (second polymer insulator) having the reinforced plastic according to the present invention as a core, the core is formed of the first core and the second core having different structures. The connecting portion formed by the first core member and the connecting portion formed by the second core member can be easily formed into different structures and different shapes, and the connecting portions have various structures and shapes on the facility side. Can be easily dealt with.
[0017]
In addition, the first core material and the second core material are strongly coupled to each other, and the second core material is coupled to the coupling metal fittings, and the internal force against external forces such as bending, compression, and twisting is strong. Bonding remains stable.
[0018]
Moreover, the said 2nd polymer insulator can be easily manufactured with the manufacturing method of the 2nd polymer insulator which concerns on this invention.
[0019]
In these polymer insulators according to the present invention, a thread reinforced with synthetic resin is wound around the outer periphery of at least one of the latching portions of the both core materials to hang the both core materials. It is possible to adopt a configuration that restricts the movement of the stopper, and if such a configuration is employed, all the strengths such as the tensile strength, the twist strength, and the bending strength of the polymer insulator can be further improved.
[0020]
Further, in these polymer insulators, it is possible to adopt a configuration in which both the core materials are connected to each other via a ring-shaped thread formed by reinforcing them with a synthetic resin. The direction of the connection metal fitting located in the front-end | tip part of material can be arrange | positioned in the same direction.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 show a first polymer insulator as an example of the first polymer insulator according to the present invention. The first polymer insulator is an insulator having a reinforced plastic as a core, and is composed of a first core material 10a and a second core material 10b constituting the core, and an insulating covering 10c.
[0022]
As shown in FIGS. 3 and 4, the first core member 10 a is impregnated with a pair of connecting fittings 11 and 12 and a synthetic resin wound endlessly along the outer periphery of both the connecting fittings 11 and 12. The second core material 10b is similarly wound endlessly along a pair of connecting fittings 14 and 15 and the outer periphery of both connecting fittings 14 and 15. It is comprised by the bundle thread 16 formed by impregnating a synthetic resin.
[0023]
The connecting metal fittings 11 and 12 of the first core material 10a and the connecting metal fittings 14 and 15 of the second core material 10b are cylindrical ones having inner holes 11a, 12a, 14a and 15a. Annular grooves 11b, 12b, 14b, 15b are formed. On the other hand, the bundle yarns 13 and 16 are made of a bundle of yarns made of monofilaments such as glass fibers and synthetic fibers, multifilaments, spun yarns of various fibers, etc., and synthetic resins such as epoxy resins and unsaturated polyester resins. It is formed by being impregnated and cured, and is wound along the annular grooves 11b and 12b of the connecting fittings 11 and 12 or the annular grooves 14b and 15b of the connecting fittings 14 and 15, The metal fittings 11, 12, 14, and 15 are hooked endlessly.
[0024]
The first core member 10a and the second core member 10b are hooked to each other at the intermediate portion in the state shown in FIG. 3, and are connected to each other at the intermediate portion by being folded in two. The bundle yarns 13 and 16 constituting the first core material 10a and the second core material 10b are separated into four yarn portions 13a to 13d and 16a to 16d, and the respective yarn portions 13a to 13d. Synthetic resin spacers 13e and 16e are interposed between 13d and between the yarn portions 16a to 16d.
[0025]
Moreover, the thread | yarn 16f is wound by the outer periphery of each thread part 16a-16d of the 2nd core material 10b in the connection part of the 1st core material 10a and the 2nd core material 10b. The yarn 16f has a smaller diameter than the bundled yarns 13 and 16, and is similarly formed of the same material as these.
[0026]
Thereby, in the 1st core material 10a, both connection metal fittings 11 and 12 hold a predetermined interval, and mutually oppose, and in the 2nd core material 10b, both connection metal fittings 14 and 15 hold a predetermined interval. Opposite to each other, the direction of both the coupling fittings 11 and 12 and the both coupling fittings 14 and 15 are orthogonal. Further, by binding the lump 16f in a lump through a synthetic resin that has been cured between each other by winding the yarn 16f, the bundled yarns 13 and 16 at the connecting portions of both the core materials 10a and 10b are constrained to each other, These movements are regulated.
[0027]
The insulating cover 10c is made of an elastic material such as silicone rubber or ethylene-propylene rubber, and is provided on the outer periphery of the body 17a covering the entire outer periphery of both the cores 10a and 10b and the outer periphery of the side of the body 17a. And a large number of annular pleats 17b projecting outward. The insulating covering 10c is housed in a predetermined mold in a state where the first core member 10a and the second core member 10b are hooked to each other, and is integrally molded around the outer periphery of both the core members 10a and 10b. Molded. The inner holes 11a and 12a of the connecting fittings 11 and 12 are opened coaxially facing each other, and the inner holes 14a and 15a of the connecting fittings 14 and 15 are opened coaxially facing each other.
[0028]
In the first polymer insulator having such a configuration, the core is composed of the first core material 10a and the second core material 10b, and the two core materials 10a and 10b are hooked to each other at their intermediate portions. It is configured to be bent and connected in the longitudinal direction. For this reason, in the said polymer insulator, each thread part 13a-13d and 16a-16d which comprise each core material 10a, 10b hold | maintain the space | interval in the circumferential direction in the insulating coating 10c, and are located in a longitudinal direction The twisted and bending strength of the polymer insulator is higher than that of a structure in which a single bundle of yarn is located in the center and extends in the longitudinal direction.
[0029]
In the first polymer insulator, the yarn 16f is wound around the outer periphery of each of the yarn portions 16a to 16d in the engaging portions of the cores 10a and 10b, and the synthetic polymer is cured between them. Since it is configured to restrict the movement of the latching portions of both core materials 10a and 10b by joining in a lump shape, all the strengths such as tensile strength, twist strength, and bending strength of the polymer insulator are further improved. Can be made.
[0030]
Therefore, in the first polymer insulator, in order to increase the torsional strength and bending strength, the core body is formed by winding the thread around the entire outer periphery of the core material in a substantially orthogonal shape, and the torsional strength and bending strength of the core body. There is no need to adopt a means for increasing the strength, and it is possible to eliminate troublesome work and / or introduction of a new device due to the adoption of the strength imparting means.
[0031]
FIG. 5 shows a second polymer insulator as another example of the first polymer insulator according to the present invention. The second polymer insulator is an insulator having a core made of reinforced plastic, and includes a first core member 20a and a second core member 20b constituting the core body, a connecting ring 20c for connecting both the core members 20a and 20b, and a core. It is comprised by the insulation coating body which does not illustrate covering the outer periphery of a body.
[0032]
In the second polymer insulator, the respective core materials 20a and 20b and the insulating cover are the same as the respective core materials 10a and 10b and the insulating cover 10c of the first polymer insulator, and the respective core materials 20a and 20b. This is different from the first polymer insulator in that the connection ring 20c is used for the connection. Therefore, in the second polymer insulator, the same constituent members and the same constituent parts as those of the first polymer insulator are denoted by the same reference numerals in the 20th series, and detailed description thereof will be omitted. Hereinafter, the first polymer insulator will be mainly described. The difference from the insulator will be described in detail.
[0033]
The connecting ring 20c is an endless member made of the same material as the bundled yarns 23 and 26 formed by reinforcing the bundled yarns with a synthetic resin, and is shorter than the bundled yarns 23 and 26. Is formed. Each of the core members 20a and 20b is bent in two in a state of being inserted into the connecting ring 20c and hooked to the connecting ring 20c, and the outer periphery of the connecting ring 20c is made of the same material as the yarn 16f. It is wound by the yarn 26f. Thereby, the 1st core material 20a and the 2nd core material 20b are connected via the connection ring 20c, and the movement is controlled by the thread 26f.
[0034]
In the second polymer insulator having the core body having such a configuration as the constituent member, the same effect as that of the first polymer insulator is obtained, but the directions of the two connecting metal fittings 11 and 12 and the two connecting metal fittings 14 and 15 in the first polymer insulator. Is different in that the directions of both the connecting fittings 21 and 22 and the both connecting fittings 24 and 25 are the same direction. Therefore, either the first polymer insulator or the second polymer insulator can be selected and used according to the shape of the installation site of the polymer insulator on the electric pole.
[0035]
6 and 7 show a third polymer insulator that is an example of the second polymer insulator according to the present invention. The third polymer insulator is an insulator having a reinforced plastic as a core, and includes a first core member 30a and a second core member 30b that constitute the core body, and an insulating covering 30c that covers the outer periphery of the core body. ing.
[0036]
In the third polymer insulator, the first core member 30a and the insulating cover 30c are the same as the first core member 10a and the insulating cover 10c of the first polymer insulator, and the second core member 30b is the second core member 30b. It differs from the first polymer insulator in that it is different from the core material 10b. Therefore, in the third polymer insulator, the same constituent members and the same constituent parts as those of the first polymer insulator are denoted by the same reference numerals in the 30s, and detailed description thereof will be omitted. Hereinafter, the first polymer insulator will be mainly described. The difference from the insulator will be described in detail.
[0037]
The second core member 30b constituting the third polymer insulator is composed of a single connecting fitting 34 and a bundled thread 36, and the bundled thread 36 is formed along the annular groove 34b of the connecting fitting 34. It is wound around a strip and wound endlessly. Therefore, in the second core member 30b, the connection fitting 34 is present on one end side, but the other end side is formed by the bent portions of the four yarn portions 36a to 36d of the bundle-like yarn 36. .
[0038]
As shown in FIG. 8, the second core member 30 b winds the fiber between the connecting fitting 34 and the winding device 35 of the winding device to form an endless bundle yarn 36, and the bundle yarn 36 is used as the winding device. 35, and is bent at the center thereof, and the end on the side of the winding tool 35 is hooked to the wide annular groove 34b of the connecting fitting 34. Thereby, the 2nd core material 30b of the state shown in Drawing 6 and Drawing 7 is formed.
[0039]
The first core member 30a constituting the third polymer insulator has the same configuration as the first core member 10a shown in FIG. 3, and the first core member 30a is formed on the other end side of the second core member 30b. The core body is inserted into the four yarn portions 36a to 36d of the bundled yarn 36, bent into two at the center, and hooked to the other end of the second core material 30b. Is formed.
[0040]
In the third polymer insulator having the core body having such a configuration as the constituent member, the same effect as that of the first polymer insulator is obtained. However, in the third polymer insulator, the core body is a first core material having a different structure. 30a and the second core material 30b are formed, so that one connection part formed by the first core material 30a and the other connection part formed by the second core material 30b have different structures and different shapes. It can be easily formed, and can easily cope with connecting portions of various structures and shapes on the facility side.
[0041]
In addition, the first core member 30a and the second core member 30b are strongly coupled to each other, and the bundled yarn 36 of the second core member 30b and the coupling fitting 34 are firmly coupled, such as bending, compression, and twisting. The internal coupling to the external force is stably maintained.
[Brief description of the drawings]
FIG. 1 is a partially broken front view in which a part of a first polymer insulator as an example of a first polymer insulator according to the present invention is omitted.
FIG. 2 is a partially cutaway side view in which a part of the core constituting the first polymer insulator is omitted.
FIG. 3 is a front view of a core material constituting the concentric body.
FIG. 4 is a partially cutaway side view of a concentric material.
FIG. 5 is a front view of a core constituting a second polymer insulator as another example of the first polymer insulator according to the present invention.
FIG. 6 is a partially broken front view in which a part of a third polymer insulator, which is an example of a second polymer insulator according to the present invention, is omitted.
FIG. 7 is a partially broken side view in which a part of the core constituting the third polymer insulator is omitted.
FIG. 8 is an explanatory view showing a method of forming a second core material constituting the third polymer insulator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10a ... 1st core material, 11, 12 ... Connection metal fitting, 11a, 12a ... Inner hole, 11b, 12b ... Annular groove, 13 ... Bundle thread, 13a-13d ... Thread part, 13e ... Spacer, 10b ... 1st Two-core material, 14, 15 ... Connecting metal fittings, 14a, 15a ... Inner hole, 14b, 15b ... Annular groove, 16 ... Bundle thread, 16a-16d ... Yarn part, 16e ... Spacer, 16f ... Yarn, 10c Insulating coating, 17a ... trunk, 17b ... pleat, 20a ... first core material, 21, 22 ... coupling fitting, 21a, 22a ... inner hole, 21b, 22b ... annular groove, 23 ... bundle thread, 23a to 23d ... yarn portion, 23e ... spacer, 20b ... second core material, 24,25 ... connecting bracket, 24a, 25a ... inner hole, 24b, 25b ... annular groove, 26 ... bundle yarn, 26a-26d ... Yarn part, 26e ... Spacer, 26f ... Yarn, 20c ... Connection , 30a ... first core material, 31, 32 ... coupling fitting, 31a, 32a ... inner hole, 31b, 32b ... annular groove, 33 ... bundle yarn, 33a-33d ... yarn portion, 33e ... spacer, 30b ... 2nd core material, 34 ... Connection metal fitting, 34a ... Inner hole, 34b ... Annular groove, 35 ... Winding tool, 36 ... Bundle thread, 36a-36d ... Yarn part, 36f ... Yarn, 30c ... Insulation coating Body, 37a ... trunk, 37b ... pleat.

Claims (6)

From a pair of connecting fittings positioned at a predetermined interval and a bundle of yarn reinforced with a synthetic resin wound around an annular groove provided on the outer periphery of these connecting fittings and hooked endlessly A core body formed by connecting a pair of core materials, and a reinforced plastic core body provided with an insulating coating made of a resilient material that covers the outer periphery of the core material, each core material Is an insulator having a core made of reinforced plastic, characterized in that it is folded in two in a state of being hooked to each other at an intermediate portion in the longitudinal direction and connected in the longitudinal direction. From a pair of connecting fittings positioned at a predetermined interval and a bundle of yarn reinforced with a synthetic resin wound around an annular groove provided on the outer periphery of these connecting fittings and hooked endlessly A first core material, a single connection fitting, and a bundle reinforced with a synthetic resin wound around a plurality of strips along an annular groove provided on the outer periphery of the connection fitting. An insulator having a core made of a reinforced plastic provided with a core formed by connecting together a second core made of yarn and an elastic covering material covering the outer periphery of the core. The reinforced plastic is characterized in that the first core member is bent in two in a state of being hooked to the second core member at an intermediate portion in the longitudinal direction and connected in the longitudinal direction. Eggplant with a core. 3. An insulator having a reinforced plastic core according to claim 1 or 2, wherein at least one outer periphery of a hooking portion on which the two core members are hooked with each other is wound with a yarn reinforced with a synthetic resin. An insulator using a reinforced plastic as a core, wherein movement of the hooks of the both cores is restricted. The insulator having the reinforced plastic core according to claim 1, 2, or 3, characterized in that the both core members are connected to each other via a ring-shaped thread reinforced with a synthetic resin. An insulator with a reinforced plastic core. A method for manufacturing the insulator according to claim 1, wherein the two core members are folded in two in a state of being hooked to each other at an intermediate portion of the two core members, and are connected in the longitudinal direction. A method of manufacturing an insulator using a reinforced plastic as a core, wherein the outer periphery of both the core members is covered with an insulating covering made of a resilient material. It is a method of manufacturing the insulator according to claim 2, wherein the first core material is inserted between the threads of the second core material, and the two are hooked on the second core material. Insulators with reinforced plastic as a core, which are bent and connected in the longitudinal direction, and the outer periphery of both cores is covered with an insulating covering made of a resilient material while maintaining this connected state Manufacturing method.

Images