JP2010239859A - Charge warning indicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charge warning indicator in which a light-emitting element can be turned on or can be blinked with no external power supply. <P>SOLUTION: The charge warning indicator includes an electrode in which a central conductor is inserted, the light-emitting element which emits light by a voltage induced between the central conductor and the electrode, and a circuit for turning on the light-emitting element or making it blink. Since combination of an electrode shape and a circuit on a circuit base is optimized, sufficient induction power is obtained with no external power supply. Consequently, the light-emitting element can be turned on or can be blinked at the luminance capable of calling worker's attention with no external power supply. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a charging indicator, and more particularly, to a charging indicator for notifying a charging state of a high voltage cable or a high voltage bypass cable by lighting or blinking of a light emitting element.

  Conventionally, in a high voltage rubber or plastic mold terminal having an external semiconductive layer grounded to the outermost layer, a small conductive or semiconductive material is removed in an insulator layer exposed by removing a part of the semiconductive layer. A terminal with a built-in high-voltage bypass cable charging indicator that embeds a non-grounding part (electrode) and blinks a light-emitting lamp such as a light-emitting diode by a voltage induced between the semiconductive layer and the electrode is known (for example, Patent Document 1). In Patent Document 1, an operator can confirm the presence or absence of a charged state by watching blinking of a light emitting lamp such as a light emitting diode.

JP-A-10-178733

  However, in the terminal with a built-in high-voltage bypass cable charging indicator of Patent Document 1, when a light-emitting diode is adopted as a light-emitting lamp, the electrode is small and has a small surface area. The voltage and charging current (several μA) induced between them were low, and sufficient luminance of the light emitting device was not obtained (7 to 30 mA is required for the rated product). As a result, an external power supply that is unnecessary in terms of function is required.

As a result of extensive research, the inventor has found that if the combination of the electrode shape and the circuit is optimized, sufficient induced power can be obtained without an external power source, and the present invention has been completed.
In addition, the inventors have found that if a high-intensity light-emitting diode is employed as the light-emitting element, the light-emitting element can be lit or blinked with higher luminance, and the present invention has been completed.

An object of this invention is to provide the charge indicator which can light up or blink a light emitting element, without requiring an external power supply.
Another object of the present invention is to provide a charge indicator capable of lighting or blinking a light emitting element with higher luminance.

  The invention according to claim 1 is a terminal of a high voltage cable or a high voltage bypass cable or a connecting material thereof, and a part or all of the outer peripheral surface of the central conductor is separated from the outer peripheral surface of the central conductor by a predetermined distance. A ring-shaped or half-ring-shaped electrode provided so as to surround, and provided on an outer peripheral surface of the end of the high-voltage cable or the high-voltage bypass cable or a connecting material thereof, and is induced between the central conductor and the electrode It is a charge indicator provided with the light emitting element which light-emits by voltage, and the circuit which makes this light emitting element light or blink.

  According to the first aspect of the present invention, by inserting the central conductor into the inner space of the electrode and charging it, a voltage is induced between the central conductor and the electrode, and the light emitting element is turned on via the circuit. Or blink. At that time, the induced power is increased by optimizing the combination of the electrode shape and the circuit. As a result, even without an external power supply, the light emitting element can be turned on or blinked with a brightness that can alert the operator.

As the high-voltage cable, for example, a CV cable with a shielding layer can be employed.
As the high-pressure bypass cable, for example, a CV cable with a shielding layer can be employed.
For example, a straight connection tube, a T-branch connection tube, an insulating plug, a connector, a π-branch adapter, or the like can be used as a terminal of the high-voltage cable or the high-pressure bypass cable or a connection material thereof.
As the electrode, various ring-shaped electrodes and half-ring-shaped (C-shaped) electrodes can be employed. In addition, the electrode may have an arbitrary shape.
“The state of being separated from the outer peripheral surface of the central conductor by a predetermined distance” means that the end of the high-voltage cable or the high-voltage bypass cable or a connecting material thereof is separated from the outer peripheral surface of the central conductor by a predetermined length from the outer peripheral surface. The state which is doing.
“Surrounding part or all of the outer peripheral surface of the central conductor” means surrounding a part of the outer peripheral surface of the central conductor (for example, a semi-circumferential area) or surrounding the entire circumferential direction. .

The circuit is provided on the base. You may attach a base | substrate to the outer peripheral surface of the terminal of a high voltage cable or a high voltage bypass cable, or those connection materials in an exposed state. Moreover, you may embed a base | substrate in the terminal of a high voltage cable or a high voltage bypass cable, or those connection materials.
As a light emitting element, an EL element and a light emitting lamp can be adopted in addition to a light emitting diode (LED).
The blinking interval of the light emitting elements by the circuit is arbitrary. For example, you may blink every 0.1 to 3 seconds. The circuit may always light the light emitting element instead of blinking.

  A second aspect of the present invention is the charging indicator according to the first aspect, wherein a high-intensity light emitting diode is adopted as the light emitting element.

According to the second aspect of the present invention, since the high-intensity light emitting diode is adopted as the light emitting element, the light emitting element can be lit or blinked with higher luminance.
The high-intensity light emitting diode is an electro-optical element having a luminance of 10 mcd or more (for example, 700 mcd, 1000 mcd, 9200 mcd). By employing a high-intensity light emitting diode, the electro-optic element can be lit or blinked brighter. The current required for lighting or blinking the high-intensity light emitting diode at 10 mcd or more is 20 μA or more. The blinking interval of the light emitting element (light emitting diode) is arbitrary. For example, the interval is 0.5 seconds.

  According to a third aspect of the present invention, a reflective or transflective liquid crystal display is provided on an outer peripheral surface of the terminal of the high-voltage cable or high-voltage bypass cable or a connecting material thereof, and the circuit includes the reflective or The charging display according to claim 2, which also performs liquid crystal display of a transflective liquid crystal display.

  According to the invention described in claim 3, by charging the center conductor of the high-voltage cable or the high-voltage bypass cable, a voltage is induced between the center conductor and the electrode, and the reflection type or the anti-transmission type via the circuit. The state of charge is displayed on the liquid crystal display, and the high-intensity light-emitting diode emits light (for example, lights or blinks). As a result, during the daytime (daytime), the reflective or anti-transmissive liquid crystal display reflects external light such as sunlight. Therefore, even if the charging indicator receives direct sunlight, A liquid crystal display indicating the charging state of the bypass cable, such as “charging”, can be visually recognized. Further, at night or in a dark place, the liquid crystal display of the transflective liquid crystal display can be visually recognized by the backlight, and the light emitting diode emits light. As a result, the state of charge of the high voltage cable or the high voltage bypass cable can be visually notified regardless of day or night.

The circuit includes a display circuit for a reflective liquid crystal display or a transflective liquid crystal display, and a lighting or blinking circuit for a high-intensity light emitting diode. These circuits operate synchronously.
Reflective liquid crystal display that reflects external light such as sunlight, or transflective liquid crystal display that can use both reflected light display by external light and backlight transmitted light, and high-intensity light-emitting diode The light emitting diode is a kind of electro-optic element. The electro-optical element is a display unit that visually notifies the charging state of the high-voltage cable or the high-voltage bypass cable in the charging display.
The number of electro-optic elements used is arbitrary. It is only necessary to have at least two of a total of at least one reflective or transflective liquid crystal display and one light emitting diode.

  When a reflective liquid crystal display and a (high brightness) light emitting diode are used in combination, the reflective liquid crystal display installation part of the outer peripheral surface of the terminal of the high voltage cable or the high voltage bypass cable or the connecting material thereof is used. A light emitting diode may be installed around and outside the liquid crystal display surface of the reflective liquid crystal display so that light from the light emitting diode reaches the liquid crystal display surface. In this way, not only the light from the light emitting diode but also this light can be used as external light at night to display a liquid crystal display on the reflective liquid crystal display. In addition, it is preferable that there is no light-shielding object that blocks light emitted from the light emitting diode to the liquid crystal display surface between the light emitting diode and the liquid crystal display surface.

  As described above, the filling indicator according to the third aspect of the present invention is “the terminal of the high voltage cable or the high voltage bypass cable or the connecting member thereof, the electrode provided apart from the outer peripheral surface of the center conductor” The high-voltage cable or the high-voltage bypass cable is provided in the outer peripheral surface of the terminal of the high-voltage cable or the high-voltage bypass cable or the connecting material thereof, and the high-voltage cable or the high-voltage bypass cable is charged by a voltage induced between the center conductor and the electrode An electro-optic element for displaying the above and a circuit for causing the electro-optic element to display that the battery is in a charged state, wherein the electro-optic element is a reflective or transflective liquid crystal display. In combination with a light emitting diode.

  If comprised in this way, the fault of the following conventional charge indicators can be eliminated. That is, for example, in the case of a charging indicator having a reflective liquid crystal display disclosed in Japanese Patent No. 26158861, the charging display cannot be visually recognized at night or in a dark place where there is no external light. Further, for example, in the case of a charging indicator having a transmissive type disclosed in Japanese Patent No. 2615861 and a charging indicator having a light emitting diode disclosed in Japanese Patent Laid-Open No. 10-178733, the nighttime or dark It is possible to visually check the state of charge at a place, but when the display part is exposed to direct sunlight, the charging display of a transmissive liquid crystal display with a lower luminous intensity than sunlight, the lighting of a light emitting diode, It is difficult to visually recognize the blinking.

  On the other hand, in the filling display according to claim 3, for the charge display during the day, both the reflection type liquid crystal display or the display of the reflected light by the external light and the display by the transmitted light of the backlight are possible. A semi-transmissive liquid crystal display is used, and a semi-transmissive liquid crystal display or a light emitting diode is used for charging display at night or in the dark. Thereby, the charge state of the high voltage cable or the high voltage bypass cable can be visually notified regardless of day or night.

  According to the first aspect of the present invention, the shape of the electrode is configured to increase the induced power by increasing the inner surface area and optimizing the combination of the electrode and the circuit. The light emitting element can be turned on or blinked with a brightness that can alert the operator.

  In particular, according to the second aspect of the present invention, since the high-intensity light-emitting diode is employed as the light-emitting element, the high-voltage cable or the high-pressure bypass cable is being charged by lighting or blinking the light-emitting element with higher luminance. It can be visually recognized.

  According to the invention described in claim 3, by charging the central conductor, a voltage is induced between the central conductor and the electrode, and through the circuit, in the daytime, the reflection type or the anti-transmission type When the liquid crystal display reflects external light such as sunlight, a display in which the high voltage cable or the high voltage bypass cable is in a charged state can be visually recognized. On the other hand, at night or in a dark place, the backlight displays a charge on a transflective liquid crystal display, and the high-intensity light-emitting diode emits light, which can be visually recognized. As a result, the state of charge of the high voltage cable or the high voltage bypass cable can be visually notified regardless of day or night.

It is principal part sectional drawing orthogonal to the length direction of the straight connection pipe | tube with which the charge indicator which concerns on Example 1 of this invention was attached. It is a top view of the straight connection pipe | tube with which the charge indicator which concerns on Example 1 of this invention was attached. It is a disassembled sectional view parallel to the length direction of the straight connection pipe | tube with which the charge indicator which concerns on Example 1 of this invention was attached. It is a principal part expanded sectional view in another position orthogonal to the length direction of the straight connection pipe | tube with which the charge indicator which concerns on Example 1 of this invention was attached. It is an enlarged front view of the electrode for power supplies which constitutes a part of charge indicator concerning Example 1 of this invention. It is an expanded longitudinal cross-sectional view parallel to the length direction of the electrode for power supplies which comprises a part of charge indicator which concerns on Example 1 of this invention. It is sectional drawing parallel to the length direction of the T branch connection pipe | tube with which the charge indicator which concerns on Example 2 of this invention is mounted. It is a front view of the T branch connection pipe | tube with which the charge indicator which concerns on Example 2 of this invention is mounted. It is S9-S9 sectional drawing in FIG. It is a longitudinal cross-sectional view parallel to the length direction of the linear connection pipe | tube with which the charging indicator which concerns on Example 3 of this invention is mounted. It is a top view of the straight connection pipe | tube with which the charge indicator which concerns on Example 3 of this invention is mounted. It is a longitudinal cross-sectional view orthogonal to the length direction of the straight connection pipe | tube with which the charging indicator which concerns on Example 3 of this invention is mounted. It is a top view of the charge indicator which concerns on Example 3 of this invention. It is a front view of the charge indicator which concerns on Example 3 of this invention. It is a side view of the charge indicator which concerns on Example 3 of this invention. It is a front view of the charge indicator which concerns on Example 4 of this invention.

  Examples of the present invention will be specifically described below. For convenience of description, unless otherwise specified, the length direction is the length direction (front-rear direction) of the connection tube (straight connection tube, etc.), the left-right direction is the left-right direction in FIGS. 1 and 12 of the connection tube, The vertical direction refers to the vertical direction in FIGS. 1 and 12 of the connecting cylinder. In each member constituting the connection tube, the original side refers to the intermediate side in the length direction of the connection tube, and the front side refers to the end side in the length direction of the connection tube.

  1 to 3, reference numeral 10 denotes a charging indicator according to Embodiment 1 of the present invention. This charging indicator 10 is provided on a straight connection tube (connecting material) 12 for a high-pressure bypass cable and is provided at both ends. A center conductor 13 to which a pair of high-voltage bypass cables are connected and an electrode 14 inserted in a separated state are provided on the outer peripheral surface of the straight connection cylinder 12 and emit light by a voltage induced between the center conductor 13 and the electrode 14. A high-intensity light-emitting diode (light-emitting element) 15 and a circuit board (circuit) 16 that is provided in the straight connection tube 12 and blinks the high-intensity light-emitting diode 15. Note that the circuit may be changed so that the high-intensity light emitting diode 15 is always lit.

First, with reference to FIG. 2 and FIG. 3, the straight connection pipe | tube 12 is demonstrated concretely.
The straight connection cylinder 12 is extrapolated to a pair of sleeve fittings 18 having a cylindrical shape and a base portion of each sleeve fitting 18 (the end opposite to the connection side of the high-voltage cable), and has a pair of cylindrical shapes. A locking slide metal fitting 19, a cylindrical external metal fitting 20 in which a base portion of each sleeve metal fitting 18 is connected to each other and a pair of high-intensity light-emitting diodes 15 blinking in green are arranged on the outer peripheral surface, and a linear connection cylinder The cylindrical outer semiconductive layer 17 accommodated in the internal space 12, the cylindrical central conductor 13 embedded in the outer semiconductive layer 17 via the insulating layer 40, and the central conductor 13 are provided. And an internal semiconductive layer 41.

  The sleeve fitting 18 is a cylinder made of aluminum alloy. An annular groove 21 that communicates with the end surface on the original side of the sleeve metal fitting 18 is formed in a half region on the original side of the inner peripheral surface of the sleeve metal fitting 18. A slide fitting 22 having an outer diameter substantially the same as the inner diameter of the sleeve fitting 18 and having a flange 22a formed at the end on the connection side is attached to the inner portion of the annular groove 21. Further, eight ball holes 18a whose outer end portions are slightly reduced in diameter are formed in the vicinity of the intermediate portion in the axial direction of the sleeve metal fitting 18 at positions centered on the axial line. In each ball hole 18a, the same number of lock balls 23 are accommodated with a part protruding outward. Each lock ball 23 is in contact with the outer peripheral surface of the slide fitting 22 at a portion opposite to the portion protruding outward.

  A guide ring 18 b is integrally formed on the outer peripheral surface of the base portion of the sleeve metal fitting 18 over the entire circumference. Further, a pair of screw holes 18c are formed on the outer peripheral surface of the guide ring 18b at opposite positions with the axis as the center. A short annular groove 18 d is formed on the outer peripheral surface of the tip portion of the sleeve fitting 18. A stopper ring 70 is attached to the annular groove 18d to prevent the locking slide fitting 19 from coming off.

  Each of the locking slide fittings 19 is a thick cylindrical body made of an aluminum alloy that is externally inserted into an intermediate portion of the sleeve fitting 18 in the axial direction. The front portion of each locking slide metal fitting 19 has a constant inner diameter and is gradually thinned in the forward direction. In addition, an annular groove 19 a is formed in a substantially half region on the original side of the inner peripheral surface of each locking slide metal fitting 19. Between the inner surface of the annular groove 19a and the end face on the front side of the guide ring 18b of the sleeve fitting 18, the locking coil spring 27 for urging each locking slide fitting 19 in the direction of the corresponding stopper ring 70 is provided. Has been inserted.

A substantially hemispherical recess 19b on which a part of each lock ball 23 is hooked is formed at a position around the axis on the inner peripheral surface of the tip of each lock slide fitting 19. . By inserting each lock ball 23 into each recess 19b, the position of the lock slide fitting 19 in the axial direction is determined. A pair of positioning notches 19c are formed at the base portion of each locking slide metal 19 so as to penetrate the front and back surfaces of the locking slide metal 19 at opposite positions with the axis thereof as the center. The locking slide metal fitting 19 is prevented from rotating by screwing the lock pin 28 into the screw hole 18c of the guide ring 18b through the notch 19c.
The external metal fitting 20 is a member for connecting the two sleeve metal fittings 18 by extrapolating the opening portions at both ends to the base portions of the two sleeve metal fittings 18. A pair of annular grooves 20 a are formed on the inner peripheral surfaces of both openings of the external metal fitting 20 so as to maintain a certain distance from the opening edge. An O-ring 29 is inserted in each annular groove 20a.

The external metal fitting 20 has a structure in which a pair of aluminum metal fittings 30 obtained by cutting a cylindrical body left and right along an axis line are detachably screwed (FIGS. 1, 2, and 4). A pair of screwing structures is provided on the upper and lower parts of the external metal fitting 20. That is, a pair of rectangular plate pieces 31 that are long in the axial direction project from the outer peripheral surfaces of both end portions of each partial metal fitting 30. Screw holes 31a are formed at both ends in the length direction of the rectangular plate piece 31 so as to penetrate the front and back surfaces. By connecting each corresponding screw hole 31a and screwing the screw 32 there, both the partial metal fittings 30 are connected and the cylindrical external metal fitting 20 is assembled.
On the front end surface of the overlapped rectangular plate pieces 31, a half-recessed portion 31b having a shape in which a trumpet is vertically divided is formed at the center in the length direction (FIGS. 1 to 3). When the external metal fitting 20 is assembled, the pair of half recessed portions 31b communicate with each other in a trumpet shape, and a housing portion for the pair of high-intensity light emitting diodes 15 is formed.

  Of the inner peripheral surface of each partial metal fitting 30, a pair of the circuit boards 16 are embedded in an intermediate portion in the length direction (FIGS. 1 and 4). Each circuit board 16 is fixed to each partial metal fitting 30 by a pair of screws 33. Each circuit board 16 is electrically connected to the high-intensity light-emitting diode 15 and the lead wire L1, and is also electrically connected to the electrode 14 via another short lead wire L2. Each circuit board 16 is configured to blink the high-intensity light-emitting diode 15 at intervals of, for example, 0.1 to 3 seconds during charging. A terminal 15 a of each high brightness light emitting diode 15 is disposed in the internal space of the external metal fitting 20.

The outer semiconductive layer 17 is a cylindrical body made of semiconductive rubber (FIG. 3). A ring-shaped (annular) electrode 14 made of aluminum is connected to an intermediate portion in the length direction of the external semiconductive layer 17 (FIGS. 1, 3, 5, and 6). The electrode 14 is an annular body having a width (length in the axial direction) of 12 mm, an inner diameter of 36 mm, an outer diameter of 60 mm, and a thickness of 12 mm. Of the outer peripheral portion of the electrode 14, flat portions are disposed at four ends of the upper, lower, left, and right sides. This is to secure a space between the inner peripheral surface of the external metal fitting 20 and the outer peripheral surface of the electrode 14 so that the pair of upper and lower high-intensity light emitting diodes 15 and the pair of left and right circuit boards 16 can be stored individually. is there.
A pair of flanges 25 are integrally formed on both sides of the outer peripheral surface of the intermediate portion in the length direction of the outer semiconductive layer 17 with the electrode 14 interposed therebetween. Each flange 25 is hooked to the end of the sleeve fitting 18 on the connection side via a pair of hook pins 24. A coil spring 26 for slide fitting is inserted between each flange 25 and the flange 22 a of each slide fitting 22, and the slide fitting 22 is positioned in the back of the annular groove 21.
The central conductor 13 is accommodated in the internal space of the outer semiconductive layer 17 via a cylindrical insulating layer 40 made of insulating rubber (FIG. 3). Both end portions of the insulating layer 40 protrude outward from the openings on both sides of the external semiconductive layer 17.

The central conductor 13 is a copper alloy linear sleeve whose axis coincides with the axis of the outer semiconductive layer 17. The ends of two high-voltage bypass cables (intermediate cables or terminal cables) are electrically connected to the openings 13 a at both ends of the center conductor 13. In addition, an air vent is formed in the center conductor 13 so that the internal air leaks to the outside when both high-pressure bypass cables are connected.
A cylindrical internal semiconductive layer 41 made of semiconductive rubber is provided on the outer peripheral surface of the intermediate portion in the length direction of the center conductor 13 (FIG. 3). The separation distance (shortest distance) between the inner peripheral surface of the electrode 14 and the outer peripheral surface of the internal semiconductive layer 41 is about 7 mm. As a result, a voltage of 400 V is induced between the electrode 14 and the internal semiconductive layer 41.

Next, with reference to FIGS. 1-6, the effect | action of the charge indicator 10 which concerns on Example 1 of this invention is demonstrated.
As shown in FIGS. 1 to 6, first, an intermediate portion in the length direction of the outer semiconductive layer 17 in which the center conductor 13 is accommodated is provided on the inner peripheral surfaces of the sleeve fittings 18 via the latch pins 24. Hang. At this time, a portion of the outer semiconductive layer 17 on the front side of each flange 25 protrudes outward along with both ends of the insulating layer 40. Next, the base part of each sleeve metal fitting 18 is extrapolated with respect to both end parts of the external semiconductive layer 17. Each sleeve fitting 18 is preliminarily inserted with each slide fitting 22 and each locking slide fitting 19 is externally inserted.

Next, the ends of the two high-voltage bypass cables are electrically connected to both openings 13 a of the center conductor 13. In this state, the high-voltage bypass cable is charged with a ground voltage of 3.8 kV. At this time, the gap between the electrode 14 and the center conductor 13 is 7.75 mm. Thereby, the voltage induced between the center conductor 13 and the electrode 14 is controlled to a constant voltage by the constant voltage circuit on the circuit board and supplied to the control circuit. As a result, the arranged high-intensity light emitting diode 15 blinks in green at intervals of about 0.1 to 2 seconds.
The operator can know that the high-voltage bypass cable (intermediate cable) is in a charged state by observing the blinking. At the time of electrical work or maintenance inspection, after that, the presence or absence of charging is confirmed using a voltage detector. If it is not charged, electrical work or maintenance inspection is performed.

As described above, since the ring-shaped electrode 14 is employed as the power source electrode and the combination of the electrode shape and the circuit of the circuit board 16 is optimized, sufficient induced power can be obtained without an external power source. As a result, the surface area is increased by about 23 times and the induced voltage is increased by about 3 times compared to a conventional flat electrode. As a result, even without an external power supply, the high-intensity light-emitting diode 15 can be blinked with a brightness that can alert the operator during the day.
Further, since the high-intensity light-emitting diode 15 is employed as the light-emitting element, the light-emitting element can be blinked with higher luminance than the conventional light-emitting diode.

Next, with reference to FIGS. 7-9, the charge indicator which concerns on Example 2 of this invention is demonstrated.
As shown in FIGS. 7 to 9, the charging indicator 10 </ b> A of the second embodiment is characterized in that a T-branch connecting tube (connecting tube) 12 </ b> A is adopted instead of the straight connecting tube 12 of the first embodiment.
Hereinafter, the T-branch connecting cylinder 12A will be described in detail.
The T-branch connecting cylinder 12A includes three sleeve fittings 18 having a cylindrical shape, three slide fittings 19 for locking which are extrapolated to the base portions of the respective sleeve fittings 18 and each sleeve fitting 18 and a base of each sleeve fitting 18. T-shaped external metal fitting 20A in which a pair of high-intensity light-emitting diodes 15 that are connected to each other and flashing green are disposed on the outer peripheral surface, and a T-shape that is housed in the internal space of the T-branch connecting cylinder 12A The outer semiconductive layer 17A, a pair of electrodes 14A disposed on the insulating layer 40, a T-shaped center conductor 13A embedded in the outer semiconductive layer 17 via the insulating layer 40A, and the center conductor And a T-shaped inner semiconductive layer 41A provided on the outer periphery of 13A.

The sleeve fitting 18 is composed of a base portion 18f and a tip portion 18e that are connected with a guide ring 18b as a boundary. The external metal fitting 20 </ b> A is fastened to the base portion 18 f of each sleeve metal fitting 18 with a machine screw 50.
Three annular grooves 20a are formed on the inner peripheral surface of the three openings of the external metal fitting 20A while maintaining a certain distance from the opening edge. An O-ring 29 is inserted into each annular groove 20a.
The external metal fitting 20A is a trifurcated tube body (FIG. 7) in which a front portion, a rear portion, and an upper portion are connected in a T shape. The external metal fitting 20A is composed of a partial metal fitting 30A made of an aluminum casting divided into two parts in the front and rear directions, and these are connected by four screw-fastening structures 51. The external metal fitting 20A has two crotch portions which are bent at right angles, and a pair of high-intensity light emitting diodes 15 are embedded on the outer peripheral surface of both crotch portions.

In the external metal fitting 20A, a pair of circuit boards 16 are embedded in the lower inner peripheral surface of the front portion and the lower inner peripheral surface of the rear portion. Each circuit board 16 is electrically connected to the high-intensity light-emitting diode 15 by a lead wire, and is also electrically connected to each electrode 14A via another lead wire. Each circuit board 16 is configured to blink the high-intensity light emitting diode 15 at intervals of 1 to 3 seconds, for example, during charging. The terminal 15a of each high-intensity light emitting diode 15 is disposed in the internal space of the external metal fitting 20A.
The outer semiconductive layer 17A is a trifurcated tube body (FIG. 7) in which a front portion, a rear portion, and an upper portion are connected in a T shape. Of these, a pair of arc-shaped notches are formed in the lower portion of the connecting portion between the front portion and the rear portion that are connected in a straight line, spaced apart in the front-rear direction. A pair of electrodes 14A having a half ring shape is inserted in each notch (FIGS. 7 and 9). Each electrode 14B is made of a conductive member having a width (length in the axial direction) of 12 mm, a height of 27 mm, an inner radius of 17 mm, an outer radius of 28 mm, and a thickness of 11 mm.

The insulating layer 40A is a trifurcated insulator in which a front portion, a rear portion, and an upper portion are connected in a T shape. Each tip of the insulating layer 40A protrudes outward from a corresponding opening of the external semiconductive layer 17A (FIG. 7).
The central conductor 13A is a three-pronged elongated tube body in which a front portion, a rear portion, and an upper portion are connected in a T shape. An inner semiconductive layer 41A is integrally provided on the outer peripheral surface of the connecting portion of the front portion, the rear portion, and the upper portion of the center conductor 13A. The length (shortest distance) between the inner peripheral surface of each electrode 14A and the outer peripheral surface of the internal semiconductive layer 41A is 7.75 mm.

As shown in FIGS. 7 to 9, when using the charging indicator 10A of the second embodiment, first, the end portions of the three high-voltage bypass cables are electrically connected to the three openings of the center conductor 13A. Next, by applying a voltage of 3.8 kV to ground to the high-voltage bypass cable, a voltage of about 1200 V is induced between each electrode 14A and the internal semiconductive layer 41A. As a result, a charging current flows through each circuit board 16, and each high-intensity light-emitting diode 15 always flashes green at a high luminance at intervals of about 0.5 seconds.
Other configurations, operations, and effects are substantially the same as those of the first embodiment, and thus description thereof is omitted.

Next, with reference to FIGS. 10-16, the charge indicator which concerns on Example 3 of this invention is demonstrated.
As shown in FIGS. 10 to 13, the charging indicator 10 </ b> B of the third embodiment is provided on a straight connection tube (connecting material) 12 </ b> B connected to one end of the high-voltage bypass cable 11, and the outer peripheral surface of the center conductor 13. The high-voltage bypass cable 11 is in a charged state by a voltage induced between the embedded electrode 14B provided away from the center electrode 13B and the outer peripheral surface of the straight connection cylinder 12B and induced between the central conductor 13 and the embedded electrode 14B. A reflective liquid crystal display (electro-optical element) 60 for displaying the light, two pairs of high-intensity light emitting diodes (electro-optical elements) 15 that emit red light, and circuits for the liquid crystal display 60 and the high-intensity light emitting diode 15 are formed. Circuit board (circuit) 16A.

  The high-voltage bypass cable 11 is for high-voltage power transmission of 6.6 kV, and includes a conductor disposed at the center of the cable, a cross-linked polyethylene insulating layer covering the conductor, and a shielding layer made of copper braid covering the outer peripheral surface of the insulating layer. A cross-linked polyethylene insulated vinyl sheath cable constituted by a coating (sheath) made of vinyl chloride covering the outer peripheral surface of the shielding layer.

Next, the straight connection cylinder 12B will be specifically described with reference to FIGS.
The straight connection cylinder 12B is externally connected to a pair of cylindrical sleeve fittings 18 spaced apart in the length direction and the base of each sleeve fitting 18 (the end opposite to the connection side of the high-pressure bypass cable 11). A pair of cylindrical locking metal fittings 19 to be inserted, a thick cylindrical outer metal fitting 20 that connects the base parts of each sleeve metal fitting 18, and a flat upper part and a lower part of the outer metal fitting 20 are detachably arranged. And a pair of optical element fixing brackets 30A in which one liquid crystal display 60, two pairs of high-intensity light-emitting diodes 15 and the circuit board 16A are disposed, and an internal space of the linear connection cylinder 12B A cylindrical outer semiconductive layer 17 housed in the outer semiconductive layer, a substantially cylindrical insulating layer 40 embedded in the outer semiconductive layer 17, and a cylindrical central guide embedded on the axis of the insulating layer 40. 13, and a said buried electrode 14B of the cylindrical embedded in the outer peripheral portion of the intermediate portion in the longitudinal direction of the insulating layer 40.

  Both sleeve fittings 18 are aluminum alloy cylinders. An annular groove 21 is formed in a half region on the original side of the inner peripheral portions of the sleeve fittings 18. A slide fitting 22 having an outer diameter substantially the same as the inner diameter of the sleeve fitting 18 and having a flange 22a formed at the end on the connection side is attached to the inner part of both annular grooves 21. Further, in the vicinity of the middle portion in the length direction of both sleeve fittings 18, eight ball holes 18 a having outer diameters slightly reduced in diameter are formed at intervals of 45 ° in the circumferential direction of the sleeve fitting 18. In each ball hole 18a, eight lock balls 23 are accommodated with a part protruding outward. Each lock ball 23 is in contact with the outer peripheral surface of the slide fitting 22 at a portion opposite to the portion protruding outward.

A pair of screw holes 18 c are formed in the upper portions of the thick base portions of both sleeve fittings 18. Further, a narrow annular groove 18d having a narrow width is formed on the outer peripheral surface of the front portion of both sleeve fittings 18. A stopper ring 70 for preventing the locking slide metal fitting 19 from coming off is attached to both annular grooves 18d.
Each of the locking slide fittings 19 is a thick cylindrical body made of an aluminum alloy that is externally inserted in an intermediate portion in the length direction of each sleeve fitting 18. The front portion of each locking slide metal fitting 19 has a constant inner diameter and is gradually thinned in the forward direction. In addition, a wide annular groove 19 a is formed in a substantially half region on the original side of the inner peripheral surface of each locking slide metal fitting 19. Between the inner surface of the annular groove 19a and the end surface on the front side of the thick base portion of the sleeve metal piece 18, a lock coil for urging each lock slide metal piece 19 toward the corresponding stopper ring 70 A spring 27 is inserted.

A substantially hemispherical concave portion 19b is formed on the inner peripheral surface of the front portion of each locking slide metal fitting 19 so that a part of the eight lock balls 23 is hooked at 45 ° intervals in the circumferential direction. . By inserting each lock ball 23 into each recess 19b, the position of the lock slide fitting 19 in the length direction is determined. A pair of positioning cutouts 19 c are formed through the front and back surfaces of the locking slide metal fitting 19 at the upper part on the original side of each locking slide metal fitting 19. The locking slide metal fitting 19 is prevented from rotating by hooking the lock pin 28 to the screw hole 18c through the notch 19c.
The external metal fitting 20 is a thick aluminum alloy cylindrical body whose upper and lower portions are intermediate metal fittings 65 which will be described later, and both sleeve metal fittings are formed by extrapolating opening portions at both ends to the base portions of both sleeve metal fittings 18. 18 is a member to which 18 is connected.

The pair of upper and lower optical element fixing brackets 30A are aluminum members having a circular arc cross section and a rectangular shape in plan view. Both optical element fixing brackets 30 </ b> A are connected to the outer bracket 20 by screwing four screws 61 into the screw holes 20 b at the upper end or the lower end of the outer bracket 20 at the four corners.
The reflective liquid crystal display 60 is provided on the front side of the central portion of both optical element fixing brackets 30A (FIGS. 11 and 13 to 15). Each liquid crystal display 60 reflects the external light such as sunlight to display the characters “charge”, which is short for charging, on a liquid crystal display.
The high-intensity light-emitting diodes 15 are arranged in pairs on the front side of both end portions in the length direction of both optical element fixing brackets 30A. Each high-intensity light emitting diode 15 emits light at 10 mcd.

  The circuit board 16A is provided below the optical element fixing brackets 30A (FIGS. 10 to 15). The liquid crystal display 60 and the high-intensity light emitting diodes 15 are electrically connected to both circuit boards 16A. The base part of the copper coil spring 63 is fixed to the center part of the back surface of both circuit boards 16A. The tips of both coil springs 63 are in contact with the outer peripheral surface of the embedded electrode 14B. During charging, the circuits of both circuit boards 16 </ b> A display a liquid crystal display of “Character” on the liquid crystal display 60 and blink the high-intensity light emitting diodes 15 at intervals of 0.5 seconds, for example.

  The outer semiconductive layer 17 is a cylindrical body made of semiconductive rubber. An annular external embedded metal fitting 64 made of an aluminum alloy is embedded in the outer peripheral surface of both side portions of the intermediate portion in the length direction of the external semiconductive layer 17. Also, an annular intermediate metal fitting 65 made of an aluminum alloy whose inner peripheral surface is in surface contact with the outer peripheral surfaces of both external embedded metal fittings 64 is formed in an annular groove 18g formed in the inner peripheral portion of the end portion on the original side of both sleeve metal fittings 18. Is inserted.

The central conductor 13 and the embedded electrode 14B are accommodated in the internal space of the external semiconductive layer 17 via a cylindrical insulating layer 40 made of insulating rubber. Both end portions of the insulating layer 40 protrude outward from the openings on both sides of the external semiconductive layer 17.
The central conductor 13 is a copper alloy linear sleeve whose axis coincides with the axis of the outer semiconductive layer 17. The ends of the two high voltage bypass cables 11 are electrically connected to the openings 13 a at both ends of the center conductor 13. In addition, an air vent is formed in the center conductor 13 so that the internal air leaks to the outside when both the high-voltage bypass cables 11 are connected.

The embedded electrode 14 </ b> B is a ring-shaped (annular) member made of a copper alloy, and is arranged on the outer periphery of the intermediate portion in the length direction of the center conductor 13 at a predetermined distance. The separation distance (shortest distance) between the inner peripheral surface of the embedded electrode 14B and the outer peripheral surface of the center conductor 13 is about 7 mm. As a result, a voltage of 1600 V is induced between the embedded electrode 14B and the central conductor 13.
A pair of short protrusions 14a are integrally formed on the upper and lower portions of the embedded electrode 14B. An electrode fixing hole 14b used in manufacturing the embedded electrode 14B is formed at the front end surfaces of both protrusions 14a.

Next, with reference to FIGS. 10-12, the action | operation of the charging indicator 10B which concerns on Example 3 of this invention is demonstrated.
As shown in FIGS. 10 to 12, the ends of the two high-voltage bypass cables 11 are electrically connected to both openings 13 a of the center conductor 13. In this state, the high-voltage bypass cable 11 is charged with a ground voltage of 3.8 kV. At this time, the gap between the embedded electrode 14B and the central conductor 13 is about 7 mm. Thereby, the voltage induced between the center conductor 13 and the embedded electrode 14B is controlled to a constant voltage by the constant voltage circuit of the circuit board 16A and supplied to the control circuit. As a result, the “full” character is displayed on the entire surface of the display panel of the liquid crystal display 60, and the high-intensity light-emitting diodes 15 blink in red at a luminance of 10 mcd at intervals of about 0.5 seconds.

That is, during the daytime (daytime), since the reflective liquid crystal display 60 reflects external light such as sunlight, even if the charging indicator 10B receives direct sunlight, the “full” liquid crystal display can be visually recognized. Become. Further, at night or in a dark place, the light emitting diode 15 emits light, which can be visually recognized. Thereby, the charge state of the high voltage bypass cable 11 can be visually notified irrespective of day and night.
The operator can know that the high-voltage bypass cable 11 is in a charged state by visually observing the liquid crystal display and blinking of these “charges”.
Further, in the third embodiment, of the outer peripheral surface of the linear connection cylinder 12B, near the front side and the rear side of the installation portion of the reflective liquid crystal display 60 and from the liquid crystal display surface of the liquid crystal display 60 (straight connection) By installing two pairs of light emitting diodes 15 in total, one pair at the front and rear, outward (in the radial direction of the cylinder 12B), part of the light from each light emitting diode 15 can easily reach the liquid crystal display surface. Thereby, not only the light of the light emitting diode 15 but also the light of “fill” can be displayed on the liquid crystal display surface of the reflective liquid crystal display 60 using this light as external light at night. If a light emitting diode having a high directivity whose light intensity varies depending on the direction is adopted, the liquid crystal characters can be displayed more clearly.

Next, with reference to FIG. 16, the charge indicator which concerns on Example 4 of this invention is demonstrated.
As shown in FIG. 16, the charge indicator 10 </ b> C according to the fourth embodiment of the present invention is characterized in that, instead of the reflective liquid crystal display 60, display of reflected light by outside light and display by transmitted light of the backlight 62 are performed. The semi-transmissive liquid crystal display 60A used in combination is employed. The backlight 62 uses a cold cathode tube disposed on the back surface of the liquid crystal display 60A as a light source at night.
Thereby, by reflecting external light such as sunlight in the daytime in the same manner as the reflective type, it is possible to visually recognize an indication that the high-voltage bypass cable 11 is in a charged state, and the backlight 62 is used at night or in a dark place. The charge display on the liquid crystal display 60A can be visually recognized using
A light emitting diode may be used for the backlight instead of the cold cathode tube. In this case, each high brightness light emitting diode 15 may be omitted.
Other configurations, operations, and effects are the same as those in the first embodiment, and thus description thereof is omitted.

  The present invention is useful for notifying the charging state of the high-pressure bypass cable, the connecting cylinder, and the terminal unit.

10, 10A, 10B, 10C Charge indicator,
12, 12B Straight connection tube (connection material),
12A T-shaped connecting tube (connecting material)
13, 13A center conductor,
14, 14A, 14B electrodes,
15 high brightness light emitting diode (light emitting element),
16, 16A circuit board (circuit),
60 reflective liquid crystal display (electro-optic element),
60A A transflective liquid crystal display (electro-optic element).

Claims (3)

Ring-shaped or provided at the end of a high-voltage cable or high-voltage bypass cable or a connecting member thereof so as to surround a part or all of the outer peripheral surface of the central conductor in a state of being separated from the outer peripheral surface of the central conductor by a predetermined distance A half-ring electrode;
A light-emitting element that is provided on an outer peripheral surface of the terminal of the high-voltage cable or the high-voltage bypass cable or a connecting material thereof, and emits light by a voltage induced between the center conductor and the electrode;
A charging indicator comprising a circuit for lighting or blinking the light emitting element.   The charging display according to claim 1, wherein a high-intensity light emitting diode is employed as the light emitting element. A reflective or transflective liquid crystal display is provided on the outer peripheral surface of the terminal of the high-voltage cable or the high-voltage bypass cable or their connecting material,
The charging display according to claim 2, wherein the circuit also performs liquid crystal display of the reflective or transflective liquid crystal display.

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