JPH0543722U - Support fittings for electric wire protection pipes - Google Patents

Abstract

(57) [Abstract] [Purpose] A support metal fitting for attaching a wire protection pipe used for protection of a low voltage line to a utility pole, and a single support metal even if the size of the protection pipe changes. Make sure it can be attached securely. [Structure] A base metal fitting 1 erected on the surface of an electric pole 5, a U bolt 2 for inserting an intermediate portion into a through hole of the base metal, and the U
The holding metal fitting 3 is inserted through the free end of the bolt, and the tightening nut 4 is screwed to the free end of the U bolt. The protective pipe 9 is sandwiched between the top of the holding metal fitting and the base metal fitting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a support fitting for an electric wire protection pipe used for protecting a pulling wire from a low voltage wire.

[0002]

[Prior Art]

 Conventionally, in the case of supporting such a pipe P on a utility pole, as shown in FIG. 8, a metal strip 10 fixed to the utility pole surface at the opening end is wrapped around the pipe in a spiral shape. A common method is to screw and tighten.

[0003]

[Problems to be solved by the device]

 By the way, electric wires such as down conductors to be protected have various loads connected by utility poles, and the number of wires and the wire sizes are different, so that the pipe sizes used are also different.

In the JIS C 8430 rigid vinyl conduit tube, nine kinds of sizes are specified with an outer diameter reference dimension of 18 to 89 mm. Among them, the sizes mainly used for protecting electric wires are 42 mm, 48 mm, 60 mm and 76 mm in outer diameter. For this reason, it was necessary to prepare four types of support fittings. This is cumbersome in terms of management, and there is a drawback that an inventory must be prepared for each size.

Therefore, an object of the present invention is to provide a support metal fitting that can be mounted in a stable state with one kind of metal fitting for all sizes of the pipe to be used.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, the support metal fitting can be adjusted according to the size of the pipe used. That is, the present invention relates to a support metal fitting for fixing an electric wire protection pipe arranged along a utility pole to the utility pole, and a base metal fitting having a substantially U-shape that is installed in an upright state with the opening end portion along the utility pole surface. , A U-bolt that inserts an intermediate portion into the through hole of the base metal fitting, and a holding metal fitting that inserts both ends into the free end of the U-bolt and is held by a tightening nut. The feature is that the protective pipe can be clamped.

The free ends of the U bolts may have a structure in which both have a threaded portion, and a tightening nut may be screwed into either of them, and one end has an enlarged head portion for retaining. It is also possible to adopt a configuration in which a tightening nut is screwed onto the threaded portion at the other end. The retainer may have a flat plate shape, but it is preferable that the center portion in the width direction is curved in a concave shape. A single through hole of the base fitting through which the U bolt is inserted may be used, but it is also possible to adopt a configuration in which it is provided in two places, that is, near the utility pole and near the top, and used selectively. In this case, it is also possible to adopt a configuration in which two through holes are continuous by a bypass hole.

[0008]

[Action]

 As described above, first install the base metal fitting on the utility pole, insert the both ends of the holding metal fitting into the free ends of the U bolts with the intermediate parts inserted in the through holes of the base metal fitting, and press with the tightening nut. With this configuration, the protective pipe is securely clamped at the tops of the retainer bracket and the base bracket. Since the holding metal fitting is one in which both ends are inserted into the free ends of the U bolts and is pressed by the tightening nut, regardless of the size of the protection pipe, a single support metal fitting can be used to protect various sizes of protection pipes. Can be clamped.

In a configuration in which one end of a U bolt having both ends of a press fitting at its free end is used as an enlarged head for retaining and a tightening nut is screwed to a screw part at the other end, Since it is only necessary to screw on one side, it has excellent workability.

Further, if the widthwise central portion of the press fitting is curved in a concave shape, the contact surface with the protective pipe increases, so that the clamping state is stable and the length of the U bolt is shortened. be able to.

If U-bolt insertion through-holes are provided at two places, it is more suitable for large-diameter pipes to be inserted closer to the top and for small-diameter pipes to be inserted closer to telephone poles. The sandwiched state is obtained. Further, in the case of a small-diameter pipe, it is possible to suppress the degree of protrusion at both ends of the U-bolt, and prevent the worker's clothes from being caught or injured.

Also, if these two through holes are made continuous by the detour holes, it is possible to easily change the position by moving through the detour holes without having to remove the U bolts one after another when the pipe sizes differ. Becomes

[0013]

【Example】

 Embodiments shown in the accompanying drawings will be described below. FIGS. 1 and 2 show an embodiment of the support fitting according to the present invention, which comprises a base fitting 1, a U bolt 2, a holding fitting 3 and a tightening nut 4. All of them use rolled steel for general structure and are galvanized. Of course, stainless steel may be used. As shown in the figure, the base metal fitting 1 has a substantially U-shape, and is attached in an upright state at an open end portion 1 a which is curved outward along the outer peripheral surface of the utility pole 5. Steel bracket mounting bands, stainless steel bands, or stainless steel wires shall be used as the mounting method for utility poles. Reference numeral 6 indicates a mounting hole. Further, when the existing mounting band is mounted on the utility pole, the band passing groove 7 is formed by cutting from the end edge portion so that it can be easily mounted by loosening it a little. Therefore, if the band is loosened, it can be easily pulled through, which makes the work on the pole convenient. Reference numeral 7a is a protrusion for preventing the band from coming off.

A through hole 8 is formed in the body portion of the base metal fitting 1, and the base metal fitting 1 can be assembled by inserting an intermediate portion of the U bolt 2. As shown in the figure, the holding metal fitting 3 is curved in a central portion in a concave shape, and is inserted into the U bolt 2 at both end portions and is held by the tightening nut 4.

As shown in the drawing, the electric wire protection pipe 9 such as a pull-down wire is sandwiched between the top portion 1b of the base metal fitting 1 and the holding metal fitting 3 and securely held. In this case, since the central portion of the holding metal fitting 3 is curved in a concave shape, there are many contact portions with the pipe 9 and a stable holding state can be obtained. Further, since both ends of the U-bolt 2 are located closer to the electric pole, the bolt length can be shortened and the protrusion degree of the bolt end can be suppressed. Further, since the holding metal fitting 3 is movable along the U-bolt 2, even if the diameter of the pipe is changed, it can be clamped by the same support metal fitting by adjusting only the tightened state of the nut 4. FIG. 3 shows another embodiment of the base metal fitting, in which through holes 8a and 8b through which the U bolt 2 is inserted are provided at two locations, that is, near the utility pole and near the top 1b. In this case, a U-bolt is inserted into the through hole 8a in the case of a large-diameter pipe and into the through hole 8b in the case of a small-diameter pipe to obtain a sandwiched state matching the size of the pipe. Especially for pipes with a small diameter, the degree of protrusion of the U-bolt end can be suppressed, and the risk of catching clothes or injury to the worker can be prevented.

FIG. 4 shows still another example of the base metal fitting 1, and shows an example in which two through holes 8c and 8d are formed and both are connected by a bypass hole 8e. In this case, there is an advantage that the U bolt can be moved to the through hole matched to the pipe diameter without removing the U bolt 2.

FIG. 5 and FIG. 6 show still another example of the support metal fittings. In the base metal fitting 1 and the pressing metal fitting 3, the same components as those in the above-mentioned embodiment are designated by the same reference numerals. As shown in the drawing, the U-bolt 2 has an enlarged head portion 2a for preventing slipping off at one end portion of the free end thereof, and has only the other end portion as a screw portion 2b for screwing the tightening nut 4. Reference numeral 2c is a protrusion formed in the middle portion of the U bolt, which has a function of positioning with respect to the base metal fitting. As shown in FIG. 7, in the holding metal fitting, one of the insertion holes of the U bolt 2 has a long hole 3a and the other has a U-shaped notch 3b. Therefore, if the enlarged head 2a side of the U-bolt 2 is inserted into the elongated hole 3a, the U-shaped notch 3b only has to be fitted in the other screw portion 2b from the radial direction, and the pole work can be performed. I am stooling. A small protrusion 3c is formed near the opening of the notch 3b to prevent the nut from escaping when the tightening nut 4 is tightened. Further, 3d is a reinforcing portion for preventing the outer side portion of the notch 3b from being bent and deformed when the nut is tightened.

FIG. 8 shows a state in which the low-voltage line W is pulled down using the support fitting A of the present invention. In the figure, the same symbols as those used above indicate the same parts.

[0019]

[Effect of the device]

 As is clear from the above detailed description, in the support fitting according to the present invention, since the protective pipe is clamped at the top of the holding fitting and the base fitting that are movable along the U-bolt, the pipe diameter is large or small. Regardless of this, a single mounting bracket ensures a secure mounting condition.

By providing a plurality of through holes formed in the base metal fitting, the mounting position of the U-bolt can be adjusted, and a mounting state suitable for the pipe diameter can be obtained.

Therefore, in the past, a plurality of types of support fittings were required according to the diameter of the pipe, but only a single support fitting could be manufactured, stocked, and managed, thus saving labor in management and achieving planned production. It has advantages such as easiness and can contribute to cost reduction. Furthermore, even at the construction site, there is no need to select metal fittings according to the pipe, and there is the advantage that there is no need for troublesome checking and confirmation.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a support fitting according to the present invention,

FIG. 2 is a side view of the same,

FIG. 3 is a side view showing another embodiment of the base metal fitting,

FIG. 4 is a side view showing still another embodiment of the base metal fitting,

FIG. 5 is a plan view showing still another example of the support fitting according to the present invention,

FIG. 6 is a side view of the same.

FIG. 7 is a perspective view of a holding metal fitting in the same embodiment;

FIG. 8 is a schematic view showing an example of using the support fitting together with the low-voltage line being pulled down.

FIG. 9 is a plan view showing a conventional pipe mounting state.

[Explanation of symbols]

A ... Support metal fitting W ... Low-voltage wire 1 ... Base metal fitting 1a ... Open end 1b ... Top 2 ... U
Bolt 2a …… Enlarged head 2b …… Screw part 3 …… Pressing metal fitting 4 …… Tightening nut 5 …… Telephone pole 6 …… Mounting hole 7 …… Band through groove 7a ……
Protrusions 8, 8a, 8b, 8c, 8d ... through hole 8e ... detour hole 9 ... protection pipe

Front page continuation (72) Inventor Hiroshi Yamaguchi 3-2-6 Honmachi, Chuo-ku, Osaka-shi, Osaka Within Osaka Hyuse Co., Ltd. HIUSE Co., Ltd.

Claims (5)

[Scope of utility model registration request] 1. A support metal fitting for fixing an electric wire protection pipe arranged along a power pole to the power pole, and a base metal fitting having a substantially U-shape that is attached in an upright state with an opening end portion along a power pole surface. U which inserts the middle part into the through hole of this base metal fitting
A wire protection pipe that is composed of a bolt and a holding metal fitting that is inserted into both ends of the U-bolt and is held by a tightening nut, and that can hold the protection pipe at the top of the holding metal fitting and the base fitting. Support metal fittings. 2. A U having both ends of a holding metal fitting inserted through the free end.
The support fitting for a wire protecting pipe according to claim 1, wherein one end of the bolt has an enlarged head portion for preventing the bolt from coming off, and a tightening nut is screwed to a threaded portion of the other end. 3. The support fitting for a wire protection pipe according to claim 1, wherein the widthwise central portion of the holding fitting is curved in a concave shape. 4. A support fitting for an electric wire protection pipe according to claim 1, 2 or 3, wherein the through holes of the base fitting for inserting the U-bolt are provided at two locations, one on the utility pole side and the other on the top side. 5. A support fitting for an electric wire protection pipe according to claim 4, wherein the two through holes are continuous by a bypass hole.