JPS637606B2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention provides a system for quickly detecting fault points such as ground faults and short circuits in power distribution lines by directly suspending them from the power lines, and when an overcurrent due to an accident or the like passes through the power lines. The present invention relates to an indicator valve of an overcurrent passing indicator that indicates this.

Prior Art The applicant of the present invention has already constructed an overcurrent passage display device in which a colored fluid 81 with low specific gravity having viscosity such as oil and a transparent fluid 82 with high specific gravity are arranged in upper and lower layers in a display tube 80 as shown in FIG. It is proposed that the fluids 81 and 82 be stored in a separate state, and an indicator valve 83 that can move up and down is disposed in the fluids 81 and 82. Note that the distance between the display valve 83 and the display cylinder 80 is, for example, 0.25 mm.
It is narrowed to a certain extent. Further, as shown in FIG. 24, this indicator valve 83 was a pair of butterfly-shaped valves 84a and 84b which were integrally formed of synthetic resin and which were rotatable downward about the diameter line P. and,
The display valve 83 is entirely disposed in a transparent fluid 82 so that it can be clearly seen through a display window 80a provided at the bottom of the display cylinder 80 under normal conditions. In addition, when an overcurrent flows, the display valve 83 is detected by a current detector (not shown) through a display drive section,
is pulled up into the colored fluid 81, the colored fluid 81 is made visible through the display window 80a to indicate the passage of an overcurrent, and then, while resisting the viscous resistance of the fluid 81, it is delayed and lowered by its own weight and returned to its original state.

Conventionally, the delayed descent time of the indicator valve 83 has been adjusted by changing the distance between the indicator valve 83 and the indicator tube 80, but the range of adjustment has been limited.

Purpose It is an object of the present invention to provide an indicator valve for an overcurrent passage indicator that can easily adjust the delay fall time of the indicator valve by providing a groove on the outer periphery of the indicator valve.

Embodiment An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 16.

In the drawings, reference numeral 1 denotes a cylindrical main body case made of synthetic resin, which is constructed by screwing a lower case 3 onto the lower outer periphery of an upper case 2. Reference numeral 3a denotes an annular locking projection protruding from the inner periphery of the lower end opening 3b of the lower case 3.

Reference numeral 4 denotes an annular locking step protruding inward from the inside of the lower part of the upper case 2, and 5 denotes a disc-shaped locking plate attached with screws 4a to the locking step 4. It is formed to be slightly smaller than the inner diameter of the case 2, and has an insertion hole 5a formed in the center thereof. Reference numeral 6 denotes four screw holes recessed at equal distances from each other on the upper surface of the peripheral wall of the upper case 2, and 7 is an annular protrusion similarly provided on the upper surface of the upper case 2.
The case 2 is curved inward at four places to avoid this.

Reference numeral 8 shown in FIG. 2 is a disc-shaped lid made of weather-resistant insulating material such as rubber, which is attached to the upper surface of the upper case 2, and has a fitting shape narrower than the width of the protrusion 7. Watertightness is ensured by providing a groove 8a on the lower surface and fitting it into the protrusion 7, and tightening bolts 9 screwed into each of the screw holes 6 through the bolt holes 8b.

Reference numeral 12 denotes a mounting portion projecting upward from the top surface of the lid body 8, which extends in the diametrical direction and has a hooking recess 12a formed in the center of the top surface with an arcuate cross section. Reference numeral 13 denotes an inverted U-shaped upper core case that is removably attached to the upper surface of the attachment part 12 so as to straddle the clamping recess 12a, and is made of an insulating material such as weather-resistant rubber. There is. Reference numeral 14 denotes an inverted U-shaped upper core made of a magnetic material that is inserted when the upper core case 13 is molded, and 15 is a U-shaped lower core made of a magnetic material that is inserted into the attachment part 12 when the lid body 8 is molded. The core constitutes a detection cut core 16 that is formed in an annular shape so as to surround the outside of the electric wire 1 in the assembled state together with the upper core 14 . L is a coil wound around the lower core 15, and together with the detection cut core 16 constitutes a detection current transformer 17.

A tapered recess 13a is formed on both lower end surfaces of the upper core case 13 along the outer edge of the cut surface 14a of the upper core 14 and becomes wider toward the bottom.
Tapered protrusions 12b are formed on the upper surface of the mounting portion 12 and are tightly fitted into the recesses 13a, thereby preventing rainwater from entering through a wedge effect.

Reference numeral 18 denotes a presser plate whose central portion is integrally molded within the upper part of the upper core case 13, and each end thereof projects from both sides of the upper core case 13 in the longitudinal direction. Reference numeral 18a denotes an insertion hole formed through one end of the presser plate 18, and reference numeral 18b denotes a locking recess formed by a cutout from one side of the other end of the presser plate 18.

Reference numeral 19 denotes a clamping member implanted in the lower part of the mounting portion 12 of the lid body 8, and is a hook-shaped base plate 19a.
The base ends of a pair of bolts 19b are respectively welded to both ends of the bolts 19b, and threaded portions 19c provided at the tips thereof are respectively protruded from the upper surface of the mounting portion 12 near each side in the longitudinal direction. And each threaded portion 19c
The insertion hole 18a of the holding plate 18 and the locking recess 18
b respectively, and by screwing together the wing nuts 20 from the upper surface of the holding plate 18, the upper core case 13 is tightened and fixed to the upper surface of the mounting portion 12,
The cut surfaces 14a and 15a of the upper core 14 and lower core 15 of the detection cut core 16 are pressed into close contact with each other.

Reference numeral 21 denotes a spring washer interposed between each end of the holding plate 18 and each wing nut 20. 2
Reference numeral 2 denotes a reverse channel-shaped retaining plate interposed between the end of the holding plate 18 on the locking recess 18b side and the spring washer 21;
The tip of the bolt 9b is inserted, and the hanging portions 22a at both ends engage with both sides of the holding plate 18, and the bolt 1 is inserted during assembly.
9b is prevented from separating from the locking recess 18b in the horizontal direction.

23 is the upper core case 13 as shown in FIG.
It is a clamp member made of an elastic material that is removably attached to a mounting recess 24 formed in the center of the lower surface of the mounting recess 24, and is provided on both sides of the upper end surface with respect to locking steps 24a formed on both sides of the lower surface of the mounting recess 24. A locking protrusion 23a protruding from the edge can be locked.
Reference numeral 23b is a fitting recess that is recessed in the lower surface of the clamp member 23 and has an arcuate cross section along the wire insertion direction. Then, the electric wire l is inserted between the clamping recess 23b and the clamping recess 12a of the mounting part 12, and the bolt 19b
The upper core case 1 is secured by the wing nut 20 screwed into the
3, the clamp member 23 is pressed downward and clamped between the two 12a and 23b. Reference numeral 25 denotes a protective cover made of synthetic resin in the shape of a square cylinder with a lid and formed to cover the upper part of the bolt 19b and the entire upper core case 13, and has a locking protrusion 25a protruding inward on the lower edge of the peripheral wall. It can be attached by engaging with a locking groove 26 that is recessed around the entire circumference of the attachment portion 12 .

By the way, the overcurrent passage display device according to the embodiment of the present invention can be roughly divided into a current detection section A that detects an overcurrent, a display drive section B operated by the detection section, and the display drive section as shown in FIG. The display device I is configured by a drive transmission mechanism section H that transmits the driving force of B, and a display device I that is operated for display by the drive transmission mechanism section H.

Therefore, first, the current detection section A will be explained. This detection section consists of the above-mentioned detection current transformer 17.
and a step-up transformer 54 (which may be omitted) connected to the coil L. 55 is a surge absorber connected in parallel to the secondary side of the step-up transformer 54.

The display drive unit B includes a full-wave rectifier 56 connected to the transformer 54, a capacitor C connected to the output side of the rectifier, and a bidirectional trigger diode TD and relay CR connected in parallel to the capacitor.
, a variable resistor R that is also connected in parallel to the capacitor C for varying the voltage applied to the capacitor C, and a contact CRa of the relay CR and a rotary solenoid RS that are also connected in parallel with the capacitor C. It consists of a series circuit of

As shown in FIG. 1, the rotary solenoid RS is fixed to a vertical portion 5b projecting upward from one side edge of the locking plate 5, and when it is energized, the output shaft is rotationally driven, and when the energization is released, the rotary solenoid RS is installed inside. The output shaft is configured to be rotated back to its original position by a return spring S serving as a force storage member. When the terminal voltage of the capacitor C reaches a certain value (for example, when an overcurrent flows), the trigger diode TD becomes conductive and the relay CR is activated. As a result, the a contact CRa of the relay CR is closed and the rotary solenoid RS is rotated by a predetermined angle (45 degrees in this embodiment) in the driving direction.

Next, the drive transmission mechanism section H will be explained.

Reference numeral 50 denotes an L-shaped bearing plate which is attached with screws 50a on the locking plate 5 parallel to and opposite to the vertical portion 5b, and is arranged such that the insertion hole 5a is located between the vertical portion 5b and the vertical portion 5b. I have to. Reference numeral 51 denotes a square-shaped bracket protruding from the upper vertical portion 5b of the coaxial bearing plate 50, the base end of which is attached to the bearing plate 50 with a screw 51a, and the tip thereof parallel to the bearing plate 50.

Note that 52 indicates the upper part of the vertical portion 5b and the bracket 51.
This is a spacing plate with both ends fixed to the upper part.

57 is a drive gear fixed to the output shaft of the rotary solenoid RS; 58 is a rotation shaft whose both ends are rotatably attached between the vertical portion 5b and the bracket 51; A driven gear 60 that meshes with 57 is fixedly attached.

The ratio of the number of teeth between the drive gear 57 and the driven gear 60 is a constant ratio (in this embodiment, it is 4:
1).

Reference numeral 61 denotes a rotating plate having a shaft 61a attached to the side of the vertical portion 5b of the bearing plate 50 so as to be freely rotatable in both directions, and the center of the shaft 61a coincides with the axis of the rotating shaft 58. The lower center of the circumferential surface corresponds to the insertion hole 5a. 61b is a V-shaped groove recessed in the lower circumferential surface of the rotating plate 61. 62 is the same rotating plate 61
It is a pin protruding from the lower side surface on the side of the vertical portion 5b, and its tip is provided with a guide slope 62a as shown in FIG. 63 is bracket 51
It is a tripping member whose base end is fixed obliquely above the rotating shaft 58 with respect to the rotating plate side surface of the distal end, and the distal end is formed so as to descend diagonally downward and forward. .

Reference numeral 64 denotes an elastic operating lever whose base end is fixed to the rotating shaft 58 so as to be interposed between the rotary plate 61 and the bracket 51, and which projects in the radial direction from the base end, and whose distal end is connected to the puller. It can be engaged with and detached from the lower surface of the detaching member 63 and the pin 62. In addition, in the normal state, the actuating lever 64 is clamped between the lower surface of the proximal end of the tripping member 63 and the surface of the bracket 51, so that the slightly vertical portion 5
It is bent towards the b side.

The driving gear 57, driven gear 60, rotating plate 6
1, the pin 62, the tripping member 63, and the operating lever 64 constitute a drive transmission mechanism H.

Next, the display device I will be explained.

Reference numeral 30 is a bottomed cylindrical display tube made of colorless and transparent synthetic resin provided below the drive transmission mechanism H, and the lower end has a hook portion 32 whose diameter is enlarged via a locking step portion 31. The outer periphery of the hook portion 32 is screwed into the opening 3b of the lower case 3 such that the lower portion 32a of the hook portion 32 protrudes from the lower edge of the lower case 3. The locking step portion 31 is an annular groove 33 recessed in the lower surface of the locking protrusion 3a.
Watertightness is ensured by being pressed against the inner O-ring 34.

Further, the outer periphery of the display tube 30 is colored with a light reflecting material 35 having a high light reflectance such as white, silver, yellow, etc. by means of coating or the like.

Reference numeral 36 denotes a synthetic resin lid that is watertightly adhered to the upper end opening of the display tube 30, and has an attachment hole 36 in the center corresponding to the insertion hole 5a of the locking plate 5.
A is transparent. As shown in FIG. 5, a mounting cylinder 37 is fitted into the mounting hole 36a, and a tubular magnet 38 having a through hole 38a in the center is fixed inside the mounting cylinder 7. Further, a magnetic fluid 39 is arranged so as to close the through hole 38a of the magnet 38. The magnetic fluid used is, for example, finely powdered iron oxide with a diameter of about 1/100,000 mm mixed with a liquid such as oil. The hole 38a is sealed.

Reference numerals 40 and 41 indicate a colored fluid (red in this embodiment) with low specific gravity and high viscosity, and a transparent fluid (in this embodiment) with high specific gravity and low viscosity, which are stored in required amounts in upper and lower layers in the display tube 30, respectively. colorless). In addition, the ratio of the specific gravity of both 40 and 41 is
Setting the value to 2.0 or more is desirable because the two-layer separation is stable, but even if the value is 1.5 or more, the longer the standing time is, the better the separation will be, so this setting is also acceptable.

Reference numeral 42 denotes a string-like member as an operating member whose upper end is engaged with the circumferential surface of the rotary plate 61 corresponding to the pin 62, and is inserted into the insertion hole 5a of the locking plate 5 and the through-hole 38a of the magnet, In addition, the fluid 40,
The lower end of the bead 44 is inserted into a through hole 47b at the center of a valve body 43 as an indicator valve located inside the display valve 41 and is engaged with a bead 44 that comes into contact with the lower surface of the valve body 43.

As shown in FIG. 7, this valve body 43 is made of synthetic resin fan-shaped valve pieces 46 which are made by equally dividing a disc into an odd number (three in this embodiment) and disposing them at a predetermined distance Q from each other. and a thin circular connection made of a flexible synthetic resin material such as flexible polyvinyl chloride, whose outer periphery is aligned with the arc-shaped peripheral surface of the fan-shaped valve piece 46 and affixed to the upper surface of each fan-shaped valve piece 46. It is composed of a member 47. Note that 47b is a through hole provided in the center of the connecting member 47. And the same valve body 43
can be moved up and down with respect to the inner circumference of the display tube 30 by a minute distance.
(0.25 mm in this embodiment), and a bending portion 4 serving as a connecting portion provided between each sector-shaped valve piece 46 in the connecting member 47.
By bending downward at 7a, each sector-shaped valve piece 46 can be rotated downward about the center of the valve body 43. When the fan-shaped valve piece 46 is rotated so that the center portion is upward and the outer circumferential portion is downward, the amount of rotation is always kept constant by abutting against the circumferential sides of other opposing fan-shaped valve pieces 46. ing. Note that this amount of rotation can be set to a desired amount by changing the interval Q. 45
is a groove recessed in the outer periphery of each sector-shaped valve piece 46, and its vertical width is wider than the minute gap between the valve body 43 and the display tube 30.

Further, the specific gravity of the synthetic resin forming the fan-shaped valve piece 46 and the connecting member 47 is appropriately selected so that the specific gravity of the valve body 43 is higher than that of the colored fluid 40 and lower than that of the transparent fluid 41. Here, there is a display tube 30 that floats on the transparent fluid 41 so that its entire lower surface is in contact with the transparent fluid 41, and that also serves as a display window.
It is located so as to have a space between it and the bottom part 30a of the bottom part 30a.

Note that 65 is a guide portion that guides the string-like member 42 protruding from the lower side surface of the bearing plate 50 so as to be located between the rotary plate 61 and the display device I.

To explain the operation of the overcurrent passage display device configured as above, when a normal load current is flowing through the electric wire I as shown in FIG. The display tube 3 is energized by
The valve body 43 is shown from the bottom 30a of 0.

If an overcurrent flows through the electric wire l due to an accident in this state, a transformed current is generated by the transformer 17 shown in FIG.

When the voltage of the capacitor C reaches a certain value,
Trigger diode TD becomes conductive and relay
CR is energized and its a contact CRa is closed. As a result, the rotary solenoid RS moves its output shaft in the driving direction against the elastic force of the internal return spring S.
When rotated, the actuating lever 64 is connected to the drive gear 57,
It is rotated 180 degrees in the direction of the arrow via the driven gear 60 and the rotation shaft 58 from the position shown by the solid line in FIG. 8 to the position shown by the chain line. At this time, as shown in FIG.
a, but due to its elasticity, the bracket 51
It bends to the side and climbs over the pin 62 while sliding on the guide slope 62a. Note that the operation of the operating lever 64 due to the rotation of the rotary solenoid RS up to this point is instantaneously performed.

Then, the rotary solenoid that has finished rotating
The output shaft of the RS starts to rotate back in the opposite direction, that is, in the counter-driving direction, by the built-in return spring S. As a result, the actuating lever 64 is connected to the drive gear 5.
7. When the driven gear 60 and the rotation shaft 58 are rotated from the position shown by the chain line in FIG. The string member 42 is then rotated in the opposite direction to wind up the string member 42. Therefore, the valve body 43 of the display device I
It is pulled upward through the string-like member 42 while resisting the viscous resistance.

At this time, the valve body 43 is inserted into the fan-shaped valve piece 4 as shown in FIG.
6 is rotated by a certain amount while being bent downward at the bending part 47a, and the whole is moved into the colored fluid 40.

Further, when the actuating lever 64 is rotated in the counter-driving direction, the tip of the actuating lever 64 comes into contact with the tripping member 63, and then slides while being pressed by the tripping member 63, so that the bracket 51 is moved by its elasticity. The detaching member 6 while bending to the side.
The return operation is completed at the proximal end of 3. At this time, the valve body 43 of the display device I is positioned above the colored fluid 40 as shown in FIG. 14 to display an overcurrent passage.
The color of the colored fluid 40 can be visually recognized through the bottom 30a of the display tube 30.

On the other hand, when the operating lever 64 is bent, the first
As shown in Figure 1, from the operating lever 64 to the rotary plate 61
The pin 62 is removed. Then, as shown in FIG. 15, the valve body 43 of the display device I begins to descend due to its own weight, and due to the viscous resistance of the colored fluid 40, each sector-shaped valve piece 4
6 returns to the horizontal position by rotating upward. Then, as shown in FIG. 16, the colored fluid 40 below the valve body 43 enters the relatively wide groove 45 of the fan-shaped valve piece 46 through the very narrow gap between the valve body 43 and the display tube 30, causing a vortex flow. , which further causes valve body 4
The valve element 43 is delayed and lowered due to the labyrinth effect and the viscous resistance of the colored fluid 40, which moves upward from the narrow space between the display tube 3 and the display tube 30. After a predetermined period of time, the lower surface of the valve body 43 comes into contact with the transparent fluid 41, thereby returning to normal display. On the other hand, as shown in FIG.
Return to below 8.

Next, a second embodiment will be described with reference to FIGS. 17 and 18.

In this embodiment, in the configuration of the first embodiment, the valve body 43 as an indicator valve is formed by a flexible thin disc-shaped connecting member 47 and a disc having the same radius as the connecting member 47. Fan-shaped valve piece 49 divided into three odd pieces
The fan-shaped valve pieces 49 are spaced a certain distance Q from each other, and a mounting step 49a protruding from the upper surface of the inner end is fixed to the lower surface of the connecting member 47 to form a groove between the valve pieces 49 and the connecting member 47. 45 is formed differently.

This embodiment functions similarly to the first embodiment.

FIG. 19 shows a third embodiment, in which a disk-shaped indicator valve 48 is integrally formed of a synthetic resin material in place of the indicator valve 43 in the structure of the first embodiment. A plurality of grooves 45 are disposed intermittently at appropriate intervals along the outer periphery. In addition, 48a
is a through hole provided in the center of the indicator valve 48 for insertion of the actuating member.

FIG. 20 shows a fourth embodiment, in which the upper peripheral edge 70a of the indicator valve 70 is replaced by the lower peripheral edge 7 in place of the indicator valve 43 in the configuration of the first embodiment.
The difference is that it is closer to the inner periphery of the display tube 30 than 0b. By doing so, when the indicator valve 70 falls under its own weight, the colored fluid 40 below the indicator valve 70 once enters the groove 45 via the lower surface peripheral edge 70b and hits the upper surface peripheral edge 70a, causing a large vortex flow. As a result, the lowering of the display valve 70 due to its own weight can be delayed.

FIG. 21 shows a fifth embodiment. In this embodiment, in place of the indicator valve 43 of the first embodiment, a plurality of grooves 45 are arranged in parallel along the outer periphery of the indicator valve 70.
They differ in how they are formed. By doing so, the labyrinth effect can be increased, and the descent of the indicator valve 70 due to its own weight can be further delayed.

FIG. 22 shows a sixth embodiment. In this embodiment, instead of the indicator valve 43 of the first embodiment, a guide part 71 that protrudes downward is provided on the lower peripheral edge 70b of the indicator valve 70. The part 71a is the display valve 70
The difference is that it forms a curved surface toward the center. By doing this, the colored fluid 40
is a guide portion 71 of the lower surface peripheral portion 70b of the display valve 70.
As a result, most of the liquid flows to the center of the lower surface of the indicator valve 70, thereby delaying the weight drop of the indicator valve 70.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, it is possible to stabilize the valve body by providing a weight part in the center of the valve body and moving the center part of the valve body in advance when the body weight descends. It is also possible to make arbitrary changes without departing from the spirit of the invention, such as by dividing the disc into a plurality of equal parts to form fan-shaped valve pieces to form a valve body.

Equal division in this invention does not mean completely equal division, but also includes unequal division with some deviation.

Effects As described in detail above, the present invention stores a fluid in a display cylinder, and provides a circular display disposed within the fluid so as to have a certain distance from the inner periphery of the display cylinder. The valve is connected to an operating member, and when an overcurrent occurs, the indicator valve is pulled up via the operating member to indicate the passage of the overcurrent, and after the overcurrent is resolved, the indicator valve is delayed to lower due to its own weight to perform the display operation for a certain period of time. In the overcurrent passage display device, by forming a groove on the outer periphery of the indicator valve to delay the fall of its own weight, it is possible to easily adjust the delayed fall time of the indicator valve.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment embodying the present invention, FIG. 2 is an exploded perspective view of the upper part of the overcurrent display device, and FIG. 3 is a current detection section and display drive of the overcurrent display device. Figure 4 is an explanatory diagram showing the pins of the rotary plate of the drive transmission mechanism, Figure 5 is a central sectional view of the lid of the display tube, and Figure 6 is the display valve. , FIG. 7 is an exploded perspective view, FIG. 8 is a perspective view showing the normal position of the operating lever of the drive transmission mechanism, and FIG. 9 shows the operating lever rotated 180 degrees from the state shown in FIG. 8. FIG. 10 is a perspective view of the state in which the rotating plate is driven by the operating lever from the state in FIG. 9, and FIG. 11 is a perspective view after the state in FIG. 10. A perspective view of a state in which the pin of the rotary plate is detached from the operating lever, FIG. 12 is a perspective view of the state in which the rotary plate is rotated by being biased by the operating member from the state of FIG. 11, and FIG. 13 is a display. A cross-sectional view of the display device with the valve in the raised state;
FIG. 14 is a cross-sectional view of the display device in the overcurrent passing display state, FIG. 15 is a cross-sectional view of the display device in the descending state, FIG. 16 is a cross-sectional view of the main part in FIG. 15, and FIG.
18 are an exploded perspective view and a sectional view showing the second embodiment, respectively, FIG. 19 is a perspective view showing the third embodiment, and FIGS.
FIG. 23 is a sectional view of a main part showing a sixth embodiment, FIG. 23 is a sectional view of a display tube showing a conventional example, and FIG. 24 is a perspective view of a display valve also according to a conventional example. Display cylinder...30, fluid...40, 41, valve body (display valve)...43, 70, groove...45.

Claims (1)

[Scope of Claims] 1. A fluid is stored in a display cylinder, and a circular display valve is disposed in the fluid so as to have a certain distance from the inner periphery of the display cylinder as an actuating member. An overcurrent passage display device which is connected to each other, and when an overcurrent occurs, pulls up the indicator valve via the actuating member to indicate the passage of the overcurrent, and after the overcurrent is resolved, the indicator valve is delayed to lower due to its own weight to perform the display operation for a certain period of time. An indicator valve for an overcurrent passage indicator, characterized in that a groove is formed on the outer periphery of the indicator valve to delay the drop of dead weight. 2. The indicator valve of the overcurrent passage indicator according to claim 1, wherein a plurality of grooves are formed intermittently along the outer periphery of the indicator valve with appropriate intervals from each other. 3. The display valve has sector-shaped valve pieces that are divided into equal parts and have grooves on the arcuate outer circumferential surface, and are connected to each other by a flexible connecting member at a certain interval, and when the display valve is raised, the connecting member Claim 1 or 2 allows for downward rotation at the portion .
Indication valve of the overcurrent passing indicator device described in . 4. The display valve is composed of a flexible disk-shaped connecting member, and equally divided fan-shaped valve pieces having an arc circumferential surface with the same diameter as the connecting member on the outer periphery, and each fan-shaped valve piece is divided into equal parts. The pieces are arranged at a constant interval from each other, and a mounting step protruding from the upper surface of the inner end is fixed to the lower surface of the connecting member to form a groove between the pieces and the connecting member,
An indicator valve for an overcurrent passage indicator according to claim 1 or 2, wherein the indicator valve is configured to be able to rotate downward at a portion of the connecting member when the indicator valve rises. 5. Claim 1, characterized in that the vertical width of the groove is greater than the distance between the display valve and the display tube.
An indicator valve of an overcurrent passage indicator according to any one of items 1 to 4. 6. Claim 1, in which a plurality of grooves are formed in parallel with each other along the outer periphery of the display valve.
The indicator valve of the overcurrent passage indicator according to any one of Items 1, 3, and 5. 7. Overcurrent according to any one of claims 1 to 6, characterized in that the upper peripheral edge of the indicator valve is closer to the inner periphery of the indicator tube than the lower peripheral edge. Indication valve of passage indicator. 8. Among claims 1 to 6, the indicator valve is provided with a downwardly protruding guide portion on the peripheral edge of the lower surface, and the inner side thereof forms a curved surface toward the center. An indicator valve of the overcurrent passage indicator according to any one of the above.