JP6578926B2 - Low pressure lead-in water drain - Google Patents

Description

  The present invention relates to a low-pressure lead-in water drainer. In particular, the present invention relates to a structure of a drain for a low-voltage lead-in wire that suppresses rainwater entering the inside of a low-voltage lead-in wire drawn into a consumer from a utility pole into the customer side.

  For example, a transformer is installed on the utility pole. And the high voltage applied to the high voltage distribution line erected on the power pole is stepped down by a transformer, and power is supplied to the home or the office by the low voltage distribution line. As an example of such a low-voltage lead-in line, a low-voltage lead-in lead-in structure for drawing a low-voltage lead-in line from a low-voltage distribution line arranged vertically on a power pole is disclosed (for example, see Patent Document 1).

  FIG. 7: is a front view which shows the structure of the example of a mounting pole of the low voltage | pressure lead-in line by a prior art. FIG. 8 is an enlarged front view of the main part of FIG. 7 and 8 of the present application correspond to FIGS. 8 and 9 of Patent Document 1.

  Referring to FIG. 7, a transformer T is installed on the utility pole P. The transformer T steps down the high voltage applied to the high voltage distribution line Wh installed on the utility pole P to a low voltage. Referring to FIG. 8, the utility pole P fixes the arm metal A in a horizontal state. A bindless insulator Gb is supported at the end of the arm metal A.

  Referring to FIG. 8, the low-voltage lead-in wire Wd is moored at one end of the bindless insulator Gb. The low-voltage distribution line We branches and branches to the low-voltage lead-in wire Wd via a ketch holder (so-called fuse holder) K in which a fuse is accommodated.

  Referring to FIG. 8, an abnormal current can be prevented from flowing through the low-voltage lead-in line Wd by connecting a fuse in series on the low-voltage distribution line We reaching the low-voltage lead-in line Wd. Further, by attaching the ketch holder K to the low-voltage distribution line We reaching the low-voltage lead-in line Wd, rainwater can be prevented from entering the low-voltage lead-in line Wd.

  As a ketch holder that prevents rainwater from entering the inside of the electric wire, a fuse can be attached and the end of the electric wire can be freely connected to the main body, and a pair of the main body portion covering the fuse attachment location to ensure insulation. A closed-type ketch holder that includes a cylindrical holder and can be installed in an oblique posture so that rainwater or the like does not flow and stay on the surface is disclosed (for example, see Patent Document 2).

Japanese Patent Laid-Open No. 10-32918 Japanese Unexamined Patent Publication No. 2012-28100, FIG.

  FIG. 9 is a front view showing a configuration of a ketch holder according to the prior art. Note that FIG. 9 of the present application corresponds to FIG. Referring to FIG. 9, the ketch holder 9 according to the related art includes a cylindrical holder body 90, a first cylindrical holder 91, and a second cylindrical holder 92.

  Referring to FIG. 9, the holder main body 90 has a fuse F detachably fixed at the center thereof. The fuse F electrically connects one electric wire W and the other electric wire W. The first cylindrical holder 91 has a hole 91h through which one electric wire W can be inserted at one end. Moreover, the 1st cylindrical holder 91 forms the internal thread part 91f in the other end part. The 1st cylindrical holder 91 can accommodate the one end part side of the holder main body 90 inside.

  Referring to FIG. 9, the second cylindrical holder 92 has a hole 92h through which the other electric wire W can be inserted at the other end. The second cylindrical holder 92 has a male threaded portion 92m at one end. The male screw portion 92m can be screwed into the female screw portion 91f. The second cylindrical holder 92 can accommodate the other end side of the holder body 90 therein.

  Referring to FIG. 9, when the first cylindrical holder 91 and the second cylindrical holder 92 are fastened to each other in a state where the holder main body 90 is accommodated inside the first cylindrical holder 91 and the second cylindrical holder 92, Both ends of the holder main body 90 can seal the hole 91h and the hole 92h. Thereby, the ketch holder 9 according to Patent Document 2 can prevent rainwater from entering the inside of the electric wire.

  However, referring to FIG. 8, the ketch holder K that prevents rainwater from entering is attached only to the voltage line and is not attached to the ground line. For this reason, there has been a problem that rainwater that has entered the ground line of the low-voltage lead-in line Wd flows into the connecting terminal of the integrating wattmeter. As a result, there is a concern that the connecting terminal of the integrating wattmeter is corroded and an abnormal voltage is generated.

  In order to solve such a problem, the ground wire of the low-voltage lead-in wire is cut with a knife or the like, and drainage is performed so that rainwater inside the ground wire of the low-voltage lead-in wire does not flow into the connecting terminal of the integrating wattmeter. However, with such a countermeasure, when the coating of the low-voltage lead-in wire deteriorates, the core wire is exposed, and there is a fear of electric shock or short circuit.

  There is a need for a low pressure service line drain that can effectively drain rainwater that has entered the ground of the low pressure service line. The above can be said to be the subject of the present invention.

  This invention is made in view of such a subject, and in order to suppress that the rain water which entered the inside of a low voltage | pressure lead-in line flows into a consumer side, the rain water which entered the inside of a low voltage | pressure lead line is effective. An object of the present invention is to provide a drainer for a low-pressure lead-in wire that can be drained to a low pressure.

  The inventor forms a low pressure lead wire drainer with a pair of semi-cylindrical members that can sandwich the low pressure lead wire from the outer peripheral direction, and one or more blade members that cut into the coating of the low pressure lead wire are formed in these semi-cylindrical shapes. Rainwater that has entered the inside of the low-pressure lead wire by forming a drainage groove in the axial direction of the inner wall of the semi-cylindrical member that is arranged inside the member and forms drainage grooves that can drain the rainwater inside the low-pressure lead wire through the blade member. Based on this, the inventors have invented the following new low-pressure lead-in water drainer.

  (1) The drainage device for a low-pressure service line according to the present invention can be attached to a low-pressure service wire arranged in a downwardly inclined manner from a utility pole toward a consumer, and drainage of rain water inside the low-pressure service line is freely drainable. A pair of semi-cylindrical shapes having a bendable connecting portion on one end side, the other end side being openable and closable, and having a semicircular groove in which the low-pressure lead wire can be sandwiched from the outer peripheral direction. Members and one or more blade members that are arranged inside these semi-cylindrical members, are capable of conducting rainwater inside the low-voltage lead-in wire, and are capable of partially cutting the coating of the low-voltage lead-in wire from the outer peripheral direction; The pair of semi-cylindrical members extends through the blade member in the axial direction of the inner wall of the semicircular groove so that drainage water that can drain rainwater inside the low-pressure lead-in wire can be discharged to the outside. .

  (2) One said semi-cylindrical member arrange | positions the said blade member in the center part, and the other said semi-cylindrical member arrange | positions the pair of said blade members in the state spaced apart from the center part by the predetermined distance. Also good.

  (3) One of the semi-cylindrical members has the drain groove at the center of the bottom of the semi-arc groove, and the other semi-cylindrical member has the drain groove at the bottom of the semi-arc groove. You may have in the center part.

  (4) One of the semi-cylindrical members includes one or more hook-shaped lock arms arranged on the other end side, and the other semi-cylindrical member protrudes on the other end side, and the lock It is preferable that the arm includes a hook-shaped latch piece having an engagement hole that can be freely locked.

  (5) One of the semi-cylindrical members includes a gripping piece that can be gripped by using an insulating operation rod that protrudes in a bowl shape on the other end side and has a pair of openable and closable gripping claws at the tip. Also good.

  The drainage device for a low-pressure lead wire according to the present invention has a blade member that partially cuts the coating of the low-pressure lead wire inside a pair of semi-cylindrical members, and can drain the rainwater inside the low-pressure lead wire via the blade member. By forming a simple water drain groove in the axial direction of the inner wall of the semi-cylindrical member, it is possible to effectively drain rainwater that has entered the inside of the low-pressure lead-in wire.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of the draining tool for low voltage | pressure lead lines by one Embodiment of this invention, FIG. 1 (A) is a front view of the draining tool for low voltage | pressure lead lines, FIG. Fig. 1 (C) is a left side view of the low-pressure lead-in water drainer, and Fig. 1 (D) is a cross-sectional view taken along the line AA in Fig. 1 (A). It is a perspective view which shows the structure of the draining tool for low voltage | pressure lead lines by the said embodiment, and is a state figure which opened a pair of semi-cylindrical member. It is a figure which shows the structure of the draining tool for low voltage | pressure lead lines by the said embodiment, FIG. 3 (A) is a front view shown with the state figure which opened a pair of semi-cylindrical member, FIG.3 (B) is FIG. It is a left view of A). It is a front view which shows the structure of the draining tool for low voltage | pressure lead lines by the said embodiment, and is the state figure which attached the draining tool for low voltage | pressure lead lines to the low voltage | pressure lead line. It is a front view which shows the structure of an example of the insulation operating bar for indirect hot wire construction which operates the draining tool for low voltage | pressure lead lines by the said embodiment. It is the front view which expanded the front-end | tip part of the insulation operating rod for indirect hot wire construction shown in FIG. It is a front view which shows the structure of the example of a mounting pole of the low voltage | pressure lead-in line by a prior art. It is the front view which expanded the principal part of FIG. It is a front view which shows the structure of the ketch holder by a prior art.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of drainage for low-pressure service lines]
Initially, the structure of the low pressure lead-in water drainer by one Embodiment of this invention is demonstrated.

  FIG. 1 is a view showing a configuration of a low pressure lead-in water drainer according to an embodiment of the present invention, FIG. 1 (A) is a front view of the low-pressure lead-in water drainer, and FIG. 1 (B) is a low-pressure lead-in water. FIG. 1C is a left side view of the low pressure lead-in water drainer, and FIG. 1D is a cross-sectional view taken along the line AA of FIG. 1A.

  FIG. 2 is a perspective view showing the configuration of the low pressure lead-in water drainer according to the embodiment, and is a state diagram in which a pair of semi-cylindrical members are opened.

  FIG. 3 is a view showing a configuration of a low pressure lead-in water drainer according to the embodiment, FIG. 3 (A) is a front view showing a state in which a pair of semi-cylindrical members are opened, and FIG. FIG. 4 is a left side view of FIG.

  FIG. 4 is a front view showing a configuration of the low pressure lead-in water drainer according to the embodiment, and is a state diagram in which the low-pressure lead-in water drainer is attached to the low-pressure lead wire. In addition, since the effect | action of the component which attached | subjected the code | symbol same as the code | symbol used by the prior art makes the action the same, it may abbreviate | omit in the following description.

(overall structure)
Referring to FIGS. 1 to 4, a low pressure lead-in water drainer (hereinafter abbreviated as a water drainer) 10 according to an embodiment of the present invention includes a pair of semi-cylindrical members 11 and 12 and three blade members 2. I have. The pair of semi-cylindrical members 11 and 12 includes a connecting portion 13h that is connected to bend at one end. The pair of semi-cylindrical members 11 and 12 can open and close their other end side. The pair of semi-cylindrical members 11 and 12 are preferably integrally formed of an insulating synthetic resin.

  1 to 3, the pair of semi-cylindrical members 11 and 12 have semi-circular grooves 111 and 121 in which the low-voltage lead-in wire Wd can be sandwiched from the outer peripheral direction. The water draining tool 10 can hold the low-pressure lead-in wire Wd in a straight state by closing the pair of semi-cylindrical members 11 and 12. Moreover, the drainage tool 10 can cover the low voltage | pressure lead wire Wd from the outer side by closing a pair of semi-cylindrical members 11 * 12 (refer FIG. 4).

  Referring to FIGS. 1 to 3, the three blade members 2 are disposed inside a pair of semi-cylindrical members 11 and 12. In a state where the pair of semi-cylindrical members 11 and 12 are closed, these blade members 2 can partially cut the covering Wi of the low-voltage lead-in wire Wd from the outer peripheral direction. And these blade members 2 can guide the rainwater inside the low pressure lead-in wire Wd.

  Referring to FIGS. 1 to 3, the inner wall of the low-voltage lead-in wire Wd extends in the axial direction. Similarly, the other semicylindrical member 12 extends the water draining groove 12 d in the axial direction of the inner wall of the semicircular arc groove 121.

  Referring to FIG. 4, in a state where the pair of semi-cylindrical members 11 and 12 are closed, the rain water Wr inside the low-pressure lead-in wire Wd can be drained to the outside via the blade member 2.

  Referring to FIGS. 1 to 4, the drainer 10 according to the embodiment includes one or more blade members 2 that partially cut the covering Wi of the low-voltage lead-in wire Wd inside the pair of semi-cylindrical members 11 and 12. By arranging and forming drainage grooves 11d and 12d in the axial direction of the inner walls of the semi-cylindrical members 11 and 12 through which the drainage water Wr inside the low-pressure lead line Wd can be drained through the blade member 2 is formed. Rainwater Wr that has entered the interior of the can be effectively drained.

(Configuration of a pair of semi-cylindrical members)
Next, the configuration of the pair of semicylindrical members 11 and 12 will be described. Referring to FIG. 2 or FIG. 3, one semi-cylindrical member 11 has the blade member 2 disposed at the center. On the other hand, the other semi-cylindrical member 12 is arranged with a pair of blade members 2, 2 separated from the central portion by a predetermined distance. The blade member 2 preferably has a cutting edge formed in a semicircular arc shape, and the cutting edge of the blade member 2 is preferably in contact with the core wire Wc of the low-voltage lead-in wire Wd.

  Referring to FIG. 2 or FIG. 3, one semi-cylindrical member 11 has a pair of drain grooves 11 d and 11 d at both ends of the semi-circular groove 111. One semicylindrical member 11 has a water draining groove 11 d at the center of the bottom of the semicircular arc groove 111. These drain grooves 11d have a square cross section.

  Similarly, referring to FIG. 2 or FIG. 3, the other semi-cylindrical member 12 has a pair of drain grooves 12 d and 12 d at both ends of the semi-circular groove 121. The other semi-cylindrical member 12 has a water draining groove 12 d at the center of the bottom of the semicircular arc groove 121. These drain grooves 12d have a square cross section.

  1 to 4, one semi-cylindrical member 11 includes a pair of hook-shaped lock arms 11r and 11r on the other end side. The other semi-cylindrical member 12 includes a pair of latch pieces 12t and 12t protruding in a hook shape on the other end side. By inserting the lock arm 11r into the opening 12h provided in the latch piece 12t, the pair of semi-cylindrical members 11 and 12 can be locked, and the pair of semi-cylindrical members 11 and 12 can be closed while being in close contact with each other. .

  Referring to FIGS. 1 to 4, one semi-cylindrical member 11 further includes a hook-shaped gripping piece 11 s protruding to the other end side. The gripping piece 11s can be gripped using the insulating operation rod 6 having the gripping tool 62 at the tip (see FIG. 5 or FIG. 6).

  With reference to FIGS. 1 to 4, the gripping piece 11 s is gripped using the insulating operation rod 6 shown in FIG. 5, toward the low pressure lead-in wire Wd arranged at a high place (see FIG. 4), The water draining tool 10 can be moved. Further, by using another insulating operation rod 6 having a gripping tool 62 at the tip (see FIG. 5 or FIG. 6), the latch piece 12t is gripped and another insulating operation rod 6 is operated. The cylindrical members 11 and 12 can also be closed.

(Configuration of insulation operation rod)
Next, the structure of an example of the insulation operation rod for indirect hot wire construction for operating the water draining tool 10 will be described. FIG. 5 is a front view showing a configuration of an example of an insulating operation rod for indirect hot-wire work for operating the low-pressure lead-in water drainer according to the embodiment. FIG. 6 is an enlarged front view of the tip of the insulating operation rod for indirect hot-wire work shown in FIG.

  Referring to FIG. 5 or FIG. 6, an insulative hot-wire construction insulating operating rod (hereinafter referred to as an insulating operating rod) 6 includes a long operating rod 61 and a gripping tool 62. Further, the insulating operation rod 6 includes an operation rod 63. The gripping tool 62 is attached to the tip of the operation bar 61.

  Referring to FIG. 5 or FIG. 6, the gripping tool 62 is composed of a pair of curved gripping arms 6a and 6b that open and close. One gripping arm 6a is a fixed arm with a base end fixed, and the other gripping arm 6b rotates around a rotation shaft 6c provided at the base end of one gripping arm 6a. It is a movable arm.

  Referring to FIG. 5, the operation rod 61 has an operation lever 64 disposed in the hand portion. The operation bar 63 is disposed along the operation bar 61. The distal end portion of the operating rod 63 is rotatably connected to the other gripping arm 6b. On the other hand, the base end portion of the operating rod 63 connects the operation lever 64.

  Referring to FIG. 5, when the operation lever 64 is operated, the other gripping arm 6b can be opened and closed with respect to one gripping arm 6a. The insulating operation rod 6 is formed of an insulating plastic pipe or the like at the intermediate portion between the operation rod 61 and the operation rod 63, and ensures insulation so as to be suitable for the indirect hot wire method.

  Referring to FIG. 5, when the operation lever 64 is grasped and the operation lever 64 is brought close to the operation rod 61, the other gripping arm 6b can be closed with respect to the one gripping arm 6a. When the operation lever 64 is released, the other gripping arm 6b can be opened with respect to one gripping arm 6a by the force of a spring (not shown) connected to the control lever 64. FIG. 5 or FIG. 6 shows a state in which the other gripping arm 6b is opened to the maximum with respect to one gripping arm 6a.

  Referring to FIG. 5 or FIG. 6, one gripping arm 6a projects a tapered gripping claw 61a. The gripping claw 61a forms a gripping surface 60a. The gripping surface 60a is formed substantially in parallel along the centrifugal direction from the rotation center of the rotation shaft 6c. Similarly, the other gripping arm 6b projects a tapered gripping claw 61b. The gripping claw 61b forms a gripping surface 60b. The gripping surface 60b is arranged with a predetermined opening angle with the gripping surface 60a. With reference to FIG. 5 or FIG. 6, when the operation lever 64 is gripped, the gripping surface 60b can be brought close to the gripping surface 60a.

  The insulation operation rod 6 shown in FIG. 5 or FIG. 6 is a so-called “insulation Yoko” that can grip a high-voltage distribution line or the like placed at a high place with a pair of gripping claws 61a and 61b. And the drainage tool 10 can be operated using the insulation operation stick | rod 6. FIG.

[Operation of the water drainage tool for low-pressure service lines]
Next, the operation and effect of the water draining tool 10 will be described while explaining the operation method of the water draining tool 10 according to the embodiment.

  First, referring to FIG. 2 or FIG. 3, using the insulating operation rod 6 (see FIG. 5 or FIG. 6), the gripping piece 11s is gripped and the pair of semi-cylindrical members 11 and 12 are opened. The water draining tool 10 is moved toward the low-pressure lead-in wire Wd arranged at a high place (see FIG. 4). In addition, the low voltage | pressure lead-in wire Wd is arrange | positioned in the state inclined down toward the consumer from the utility pole P (refer FIG. 4).

  Next, with reference to FIG. 2 or FIG. 3, the low pressure lead-in wire Wd is introduced into the semicircular groove 111 of one semicylindrical member 11 in a state where the pair of semicylindrical members 11, 12 is open. Next, using another insulating operation rod 6 (see FIG. 5 or FIG. 6), the latch piece 12t is gripped, and the plurality of blade members 2 can partially cut the covering Wi of the low-voltage lead-in wire Wd from the outer peripheral direction. Rainwater Wr inside the low-voltage lead-in line Wd can be drained (see FIG. 4). And a series of work is complete | finished.

  With reference to FIGS. 1 to 4, the drainage tool 10 according to the embodiment includes one or more blade members 2 that partially cut the covering Wi of the low-voltage lead-in wire Wd inside the pair of semi-cylindrical members 11 and 12. Are formed in the axial direction of the inner wall of the semi-cylindrical members 11 and 12 so that the rain water Wr inside the low-pressure lead line Wd can be drained freely through the blade member 2. Rainwater Wr that has entered Wd can be effectively drained.

  With reference to FIGS. 1 to 4, the water draining tool 10 according to the embodiment uses an insulating operation rod 6 having a pair of openable and closable gripping claws 61 a and 61 b at the tip (see FIG. 5 or 6). Since the gripping piece 11s that can be gripped is provided, electrical work can be safely performed by the indirect hot wire method.

  With reference to FIGS. 1 to 4, the drainer 10 according to the embodiment includes a lock arm 11 r and a latch piece 12 t that can be locked to each other. By inserting the lock arm 11r into the opening 12h provided in the latch piece 12t, the pair of semi-cylindrical members 11 and 12 can be reliably locked.

The drainage device for low-pressure lead wires according to the present invention can be expected to have the following effects.
(1) It is possible to suppress rainwater that has entered the inside of the low-voltage lead-in wire from flowing into the integrating wattmeter.
(2) Since rainwater that has entered the inside of the low-voltage service line can be drained effectively, the number of times the low-voltage service line is replaced can be reduced.
(3) The life of the low-voltage lead-in wire can be extended.
(4) It is convenient to carry because of its small size and light weight.

2 Blade member 10 Drainage tool (Drainage tool for low pressure lead wire)
11.12 Pair of semi-cylindrical members 11d Drain groove 12d Drain groove 13h Connecting portion 111 Semi-circular groove 121 Semi-circular groove Wd Low pressure lead-in wire Wi

Claims (5)

It can be attached to a low-pressure service line arranged in a state of being inclined downward from a utility pole toward a consumer, and is a drainage tool for a low-pressure service line capable of draining rainwater inside the low-pressure service line,
A pair of semi-cylindrical members having a bendable connecting portion on one end side, the other end side being configured to be openable and closable, and having a semicircular groove in which the low-voltage lead wire can be sandwiched from the outer circumferential direction;
One or more blade members that are disposed inside these semi-cylindrical members, are capable of conducting rainwater inside the low-voltage lead-in wire, and are capable of partially cutting the coating of the low-voltage lead-in wire from the outer peripheral direction,
A pair of the semi-cylindrical members extend through the blade member, a drain groove that allows drainage of rain water inside the low-pressure lead line to the outside, and extends in the axial direction of the inner wall of the semi-circular groove. Water drainer. One of the semi-cylindrical members arranges the blade member in the center,
The other semi-cylindrical member is the water drainage tool for low-pressure service lines according to claim 1, wherein the pair of blade members are arranged in a state of being separated from the central portion by a predetermined distance. One of the semi-cylindrical members has the drain groove at the center of the bottom of the semi-circular groove,
The other semi-cylindrical member has the drain groove at the center of the bottom of the semi-circular groove, according to claim 1 or 2. One of the semi-cylindrical members includes one or more hook-shaped lock arms disposed on the other end side,
The other semi-cylindrical member is provided with a hook-shaped latch piece that protrudes toward the other end and opens an engagement hole in which the lock arm can be locked. Drainage tool for low pressure service lines.   One of the semi-cylindrical members includes a gripping piece that can be gripped using an insulating operation rod that protrudes in a bowl shape on the other end side and includes a pair of openable and closable gripping claws at a tip end portion. Item 5. A draining tool for low-pressure lead wires according to any one of Items 1 to 4.

Images