JP3400895B2 - Insulator with reinforced plastic core - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulator having a reinforced plastic as a core.

[0002]

2. Description of the Related Art Generally, an insulator having a reinforced plastic as a core is known as a so-called polymer insulator or a plastic insulator, and one type thereof is, for example, US Pat.
As described in Japanese Patent No. 406,033, a reinforced plastic formed by impregnating a predetermined core material formed by winding continuous yarns and forming through holes at each end with a synthetic resin and curing the core material. There is an insulator in which the core body and the insulating coating body that covers the outer circumference of the core body are provided, and each through hole of the core material opens at the outer peripheral portion of each end to form a connection hole.

The polymer insulator of this type has a high tensile strength, and is superior in impact resistance and lightweight as compared with the porcelain insulator, and therefore has an advantage that it is excellent in handling such as transportation work and mounting work.

[0004]

By the way, in the polymer insulator of this type, handling property will be further improved, and not only tensile strength and impact resistance but also bending strength,
It is expected that insulators having excellent compressive strength and torsional strength will be required. Therefore, an object of the present invention is to improve at least one characteristic such as handleability, bending strength, compressive strength and torsional strength in this type of polymer insulator.

[0005]

SUMMARY OF THE INVENTION The present invention is a reinforced plastic.
Click relate the insulator to the core, made of reinforced plastic formed by impregnating a predetermined length core material synthetic resin obtained by forming a through hole by winding a continuous yarn on each end curing A reinforced plastic of the type having a core body and an insulating coating body for coating the outer periphery of the core body, and each through hole of the core material being opened at the outer peripheral portion of each end to form a connecting hole. It is intended to be applied to an insulator that is a core body.

A first aspect of the present invention, in the insulator to core the reinforced plastic of the type described above, as the core material, by winding the continuous yarn in a state of intersecting at between both through-holes It is characterized by adopting the core material.

A second aspect of the present invention is an insulator using a reinforced plastic of the above-mentioned type as a core, wherein the continuous yarn is used as the core material in a state where the continuous yarns are crossed a plurality of times between the both through holes. It is characterized in that a core material is adopted which is wound and has insulating spacers interposed between these intersecting portions.

A third aspect of the present invention is an insulator using a reinforced plastic of the above-mentioned type as a core, wherein the core material is a core material twisted one or more times between the through holes. It is characterized by having done.

A fourth aspect of the present invention is an insulator having a reinforced plastic of the above-mentioned type as a core, wherein a plurality of cores twisted one or more times between the through holes are used as the core material. It is characterized in that the core materials are adopted and arranged in parallel with the respective core materials having different twist directions.

A fifth aspect of the present invention is an insulator using a reinforced plastic of the above-mentioned type as a core, wherein the core material is twisted one or more times between the through holes. It is characterized in that a multi-layered core material concentrically provided with a plurality of different core materials is used.

In addition, in the insulator using the reinforced plastic according to each invention of the present invention as the core, the through hole at each end of the core is formed by a cylindrical connecting fitting, or the continuous yarn is formed. It is preferable that the core be wound into a ring and that the cross section of the core material that is orthogonal to the longitudinal direction be trapezoidal with the inner side surface as the base.

[0012]

[Operation and effect of the invention] Since each porcelain insulator having the reinforced plastic core as constructed above has a high tensile strength, and is superior in impact resistance and lighter than the porcelain insulator, It has a characteristic that it is excellent in handling such as mounting work .

Further, Oite each碍element according to the present invention, continuous yarn constituting the core member intersect one or more times in between both through-holes, or the core material between the through-hole Since the continuous yarns are twisted one or more times and the direction of arrangement of the continuous yarns intersects with the longitudinal direction of the insulator, strengths other than tensile strength, for example, bending strength, compression strength, and torsional strength are significantly improved. be able to. In this case, in the insulator in which the core material is twisted, it is easier to form the core body as compared with other core bodies, but in consideration of the return of the twist of the core material when the insulator is used. It is preferable that a plurality of core materials having different twisting directions are arranged in parallel, or a multi-layer structure in which the core materials are concentrically arranged.

Further, in each of the insulators according to the present invention, when the constitution in which the continuous yarn is wound in an annular shape to form the through hole at each end of the core material is adopted, the weight of the insulator is further reduced. This can be achieved, and the compressive strength in the longitudinal direction of the insulator can be further improved. Furthermore, in each insulator according to the present invention, if a configuration in which a cross section orthogonal to the longitudinal direction of the winding portion of the continuous yarn is formed into a trapezoidal shape, a high tensile breaking stress can be obtained with a small amount of continuous yarn. The material can be effectively used and the bending strength can be improved, and the material can be effectively utilized.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the drawings. The insulators to which the present invention is applied are shown in FIGS.
A child embodiment is shown. The insulator is an insulator having a reinforced plastic as a core, and is composed of a core 10a and an insulating coating 10b.

The core body 10a is a cylindrical connecting fitting 11,1.
In the outer peripheral groove of 2, continuous filaments made of monofilament such as glass fiber, synthetic fiber, multifilament, spun yarn of various fibers, etc. are wound many times to form a bundle, and a core made of the bundled continuous filament. It is formed by impregnating a material with a synthetic resin such as an epoxy resin or an unsaturated polyester resin and curing it, and has a so-called racetrack shape. Therefore, the core body 10a is composed of an oval, endless plastic core 13 made of fiber reinforced plastic, and the connecting fittings 11 and 12 located inside each tip of the plastic core 13. The outer periphery of the body 10a is covered with an insulating coating 10b.

The insulating coating 10b is made of synthetic rubber such as silicone rubber or ethylene-propylene rubber, and has a cylindrical portion 14a for covering the entire outer periphery of the core 10a and a cylindrical portion 1.
A plurality of umbrella portions 14b protruding outward at the outer peripheral side of 4a
It is composed of and. The insulating coating 10b is the core 1
0a is molded integrally with the concentric body 10a in a state where it is housed in a predetermined molding die, and at the time of this molding, an insulating coating is applied to the space inside the plastic core 13 that constitutes the core 10a. A synthetic rubber, which is a forming material of the body 10b, is filled, and a space portion inside the plastic core 13 is filled with a synthetic rubber filling material 15.

The filler 15 may be made of a material different from the synthetic rubber used to form the insulating coating 10b, such as an epoxy resin containing glass fiber pitch or the like. Bending strength can be improved.

The insulating cover 10b is formed by inserting a pin into the inner hole of each of the connecting fittings 11 and 12 constituting the core 10a at the time of forming.
The inner hole 11 of each of the connecting fittings 11 and 12 is provided on the side of the outer periphery of a.
a and 12a are open, and each inner hole 11a and 12a constitutes a connecting hole. Further, as shown in FIG. 2, the cylindrical portion 14a and the umbrella portion 14b that form the insulating cover 10b are formed in an oval outer shape.

The insulator thus constructed has a core 10
The core body 1 has high tensile strength due to a.
0a and the insulating cover 10b have excellent impact resistance and are lightweight, which makes them excellent in handling such as transportation work and mounting work. However, the outer shape of the umbrella portion 14b of the insulating cover 10b has an oval shape. Since it is formed, it does not roll even when the insulator is placed on the inclined surface, and handling is extremely good.

[0021] Figure 3, three embodiments of the core body constituting the insulator according to the present invention is shown. These cores are
It is adopted in place of the core body 10a of the insulator shown in FIG. 1 and FIG. 2 and is naturally adopted also in the insulator in which the umbrella portion of the insulating coating is circular.

Thus, the first embodiment shown in FIG. 3 (a)
In the core body 10c according to the embodiment, the continuous thread is wound around the connecting metal fittings 11 and 12 a number of times in an inclined state to form the connecting metal fitting 1
A core material having one intersection between 1 and 12 is formed. Therefore, the plastic core 1 constituting the core body 10c
In No. 3, since the arrangement direction of the bundle-like continuous yarns intersects the longitudinal axis of the insulator, the core 1
In the insulator adopting 0c, bending strength, torsional strength, and compressive strength other than the tensile strength in the longitudinal direction can be improved.

In the core body 10d according to the second embodiment shown in FIG. 3 (b), a continuous thread shape is formed on both connecting fittings 11, 12.
A core material is formed by intersecting four times and winding a large number of times, and spacers 16a, 16b, 16c made of synthetic resin and having flanges at both ends are interposed between the intersections. ing. Each of the spacers 16a to 16c functions to surely maintain the crossed state of the continuous yarns a plurality of times. In the insulator adopting the core body 10d, the continuous yarns constituting the core material of the plastic core 13 are crossed a plurality of times, and therefore, compared with the insulator adopting the core body 10c according to the first modification. As a result, bending strength, torsional strength, and compressive strength can be further improved.

In the core body 10e according to the third embodiment shown in FIG. 3C, two plastic cores 13a,
It is formed in a composite structure in which 13b are concentrically arranged.
The first plastic core 13a is the second plastic core 1
3b, which are concentrically contained in both cores 13a, 1
The core material forming 3b is twisted many times between the connecting fittings 12 and 13, but the twisting directions are opposite to each other. Thereby, when the core body 10e is adopted, it is possible to prevent the phenomenon of twisting back of the plastic cores 13a and 13b against a large tensile load that the insulator receives during use, and to bend the insulator,
The torsional strength and compressive strength can be further improved.

FIG. 4 shows a fourth core member of the insulator.
Embodiment is shown. Core body 1 according to the embodiment
Oite the 0f, 2 pieces of plastic core 13c, 13
It is formed by arranging d in parallel. The core materials forming the plastic cores 13c and 13d are shown in FIG.
As shown in (b), the connection fittings 11 and 12 are twisted once, and their twisting directions are opposite to each other. Therefore, when the core body 10f is adopted, the same operational effect as when the core body 10e of the third embodiment is adopted is obtained.

FIG. 5 shows a fifth core member of the insulator.
Embodiment is shown. Core body 1 according to the embodiment
At 0 g, the core bodies 10a, 10c to 10 described above are used.
Unlike f, the through holes 11b and 12b are formed without using the connecting fittings 11 and 12. That is, in the core body 10g, the continuous yarn is wound around a pair of pins that are held at a predetermined interval while being wound between both pins, and then a core material made of a bundle of continuous yarns is impregnated with a synthetic resin. After hardening by curing, each pin is removed to remove each through hole 11b, 12
b is formed. In the insulator using the core body 10g, since the connecting fittings 11 and 12 are not present, the weight can be further reduced and the compressive strength in the longitudinal direction can be improved.

In the core body 10g, as shown in FIG.
As shown in (a) and (b), means for forming a core material in a bundle by winding continuous yarns in a cross shape, or as shown in FIGS. The strength can be further improved by adopting a means for imparting a twist to the core material formed into a shape. Further, the core body 10 according to each embodiment
c to 10g are not limited to the insulators shown in FIGS. 1 and 2, but can be adopted as the core body of the insulator in which the umbrella portion of the insulating coating body is circular, and the characteristics of the core bodies 10c to 10g are sufficient. Can be demonstrated.

FIG. 6 shows a cross section orthogonal to the longitudinal direction of the plastic core constituting the core. In the present invention, a plastic core having various cross-sections 1
3e to 13k can be adopted. However,
In the plastic core, when the width w shown in FIGS. 3A and 3B is constant, the tensile fracture stress of the plastic core decreases as the thickness t increases. FIG. 7 shows the thickness t and width w of the plastic core.
Is a graph showing an example of the relationship between the tensile breaking stress of the plastic core and the tensile breaking stress of the plastic core. Referring to such a graph, the tensile breaking stress (kg / mm ² ) of the plastic core is It is recognized that the larger it is, the smaller it becomes. Therefore, in order to effectively use materials such as continuous yarns and synthetic resins, it is preferable that the cross section of the plastic core is trapezoidal with the inner side surface as the bottom, as shown by the core 13e.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a form of an insulator to which the present invention is applied .

FIG. 2 is a cross-sectional view of the same insulator as seen in the direction of arrow 2-2 in FIG.

FIG. 3 is a first embodiment of a core body constituting an insulator according to the present invention.
A side view showing a form (a), a side view showing the second embodiment (b), and a side view showing the third embodiment (c).
Is.

FIG. 4 is a side view (a) showing a fourth embodiment of the concentric body,
And (b) of FIG.

FIG. 5 is a side view showing a fifth embodiment of the concentric body.

FIG. 6 is a partial side view (a) of a core body that constitutes an insulator according to the present invention, a cross-sectional view (b) taken along line bb of the figure (a), and a cross-sectional view of each plastic core. It is (c).

FIG. 7 is a graph showing a relationship between a thickness (t) and a width (w) of a plastic core forming the concentric body and a tensile fracture stress.

[Explanation of symbols]

10a, 10c, 10d, 10e, 10f, 10g ... Core body, 10b ... Insulating coating body, 11, 12 ... Coupling metal fitting, 11
a, 12a ... Inner hole (through hole), 11b, 12b ... Through hole, 13, 13a, 13b, 13c, 13d, 13e,
13f, 13g, 13h, 13i, 13k ... Plastic core, 14a ... Cylindrical part, 14b ... Umbrella part, 15 ... Filler,
16a, 16b, 16c ... Spacers.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Satoru Nakamura Satoshi Nakamura, 1 Higashishinmachi, Higashi-ku, Nagoya, Aichi Chubu Electric Power Co., Inc. (72) Inventor Junichi Matsumoto 2-56, Suda-cho, Mizuho-ku, Nagoya, Aichi Nihon Insulator Co., Ltd. (72) Inventor Shoshiro Tamai 2-56 Sudamachi, Mizuho-ku, Nagoya-shi, Aichi Nihon Insulator Co., Ltd. (56) Reference JP-A-6-68732 (JP, A) JP-A-5- 89736 (JP, A) JP 5-182546 (JP, A) JP 35-3724 (JP, B1) JP 46-10753 (JP, B1) JP 42-17885 (JP, Y1) US Patent 54060333 (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01B 17/00-17/54

Claims (8)

(57) [Claims] 1. A core body made of a reinforced plastic, which is formed by impregnating a synthetic resin into a core material of a predetermined length formed by winding a continuous yarn and forming through holes at each end and curing the core material, and a core. An insulator having an insulating coating for covering the outer periphery of the body, wherein each through hole of the core material is opened at the outer peripheral portion of each end to form a connecting hole, and an insulator having a reinforced plastic as a core body. as wood, before
Wrap the continuous yarn in a state where it crosses between the through holes.
An insulator with a reinforced plastic core, which uses a core material made of 2. A core body made of a reinforced plastic, which is formed by impregnating a synthetic resin into a core material having a predetermined length formed by winding a continuous yarn and forming through holes at each end and hardening the core material, and a core. An insulator having an insulating coating for covering the outer periphery of the body, wherein each through hole of the core material is opened at the outer peripheral portion of each end to form a connecting hole, and an insulator having a reinforced plastic as a core body. As a material, in a state where the continuous yarn is crossed multiple times between the through holes
Insulate between each of these intersections as it winds.
An insulator with a core made of reinforced plastic characterized by adopting a core material formed by interposing a sag. 3. A core body made of reinforced plastic formed by impregnating a synthetic resin into a core material of a predetermined length formed by winding a continuous yarn and forming through holes at each end and curing the core material, and a core. An insulator having an insulating coating for covering the outer periphery of the body, wherein each through hole of the core material is opened at the outer peripheral portion of each end to form a connecting hole, and an insulator having a reinforced plastic as a core body. as wood, before
An insulator using a reinforced plastic as a core body, wherein a core material twisted one or more times between both through holes is adopted. 4. A reinforced plastic core body formed by impregnating a synthetic resin into a core material of a predetermined length, which is obtained by winding a continuous thread and forming through holes at each end, and curing the core material, and a core. An insulator having an insulating coating for covering the outer periphery of the body, wherein each through hole of the core material is opened at the outer peripheral portion of each end to form a connecting hole, and an insulator having a reinforced plastic as a core body. As the material, a plurality of core materials twisted once or a plurality of times between the through holes are used.
Adopting these core materials in different twist directions
An insulator with a reinforced plastic core that is arranged in rows . 5. A core body made of a reinforced plastic, which is formed by impregnating a synthetic resin into a core material of a predetermined length formed by winding a continuous yarn and forming through holes at each end and curing the core material, and a core. An insulator having an insulating coating for covering the outer periphery of the body, wherein each through hole of the core material is opened at the outer peripheral portion of each end to form a connecting hole, and an insulator having a reinforced plastic as a core body. As the material, the twisting directions twisted one or more times between the through holes are mutually
An insulator using a reinforced plastic as a core body, which has a multi-layered core material concentrically provided with a plurality of different core materials . 6. An insulator using a reinforced plastic as a core according to claim 1, 2, 3, 4 or 5 , wherein the core material is
An insulator using a reinforced plastic as a core, wherein a through hole at each end is formed by a cylindrical connecting fitting . 7. An insulator comprising a reinforced plastic as a core according to claim 1, 2, 3, 4 or 5, wherein the through holes at each end of the core material wind the continuous yarn in an annular shape. insulators and core of reinforced plastic, characterized in that it is formed Te. 8. The method of claim 1, 2, 3, 4, in the insulator to core a reinforced plastic according to 5, 6 or 7, prior to
A cross-section orthogonal to the longitudinal direction of the core material has the inner side surface as the bottom side.
An insulator with a reinforced plastic core, which is formed in a trapezoidal shape .