JPH0120698Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an overcurrent passage indicator for a power distribution line that is attached to a power distribution line to indicate when an overcurrent flows through the power distribution line.

More specifically, for example, by installing them in advance at multiple locations on a distribution line where overcurrent accidents frequently occur, some or one of them will be activated by the overcurrent and enter the display state.
The present invention relates to an overcurrent passage indicator for power distribution lines that allows the location of an overcurrent accident to be searched for later.

The purpose of this is to be able to clearly display the information on a large display so that it can be easily recognized from the ground that an accident has occurred, and to also be able to reset the vehicle at the same time by retracting the display. An object of the present invention is to provide a convenient overcurrent passage indicator for a power distribution line.

The drawings showing the embodiments of the present application will be described below. Reference numeral 1 indicates a fixed core, which has a structure in which a core body 2 is covered with an insulator 3. 4 is insulator 3
A mounting tool formed integrally with the is shown. The core body 2 is made of permalloy, silicon steel plate, iron, etc., and the core body 2, the insulator 3, and the mounting portion 4
is molded. Reference numeral 5 indicates an engagement recess formed on the inner surface of the mounting portion 4. Next, the above fixed core 1
In the inner pocket, 6 indicates the space for the distribution line,
7 indicates a power distribution line placed in the space 6. Reference numeral 8 denotes a receiving piece, which is formed integrally with a case body 15, which will be described later. Reference numeral 9 denotes a fixture, which is composed of a butterfly bolt 10 screwed onto the fixed iron core 1 and a presser piece 11 rotatably attached to the tip of the butterfly bolt 10. Next, reference numeral 14 denotes a case body, which consists of a case body 15, an upper support stand 16 fixed to the case body 15, a lower support stand 17, a support plate 18 fixed to both support stands 16, 17, and the like. The case body 15, the upper support stand 16, and the lower support stand 17 are each made of an insulating material (for example, a synthetic resin material). 19
indicates a fitting groove formed on the outer surface of the case body 14;
This is a groove into which the leg portions 1a, 1a of the fixed iron core 1 fit. An engagement piece 20 is fixed to the lower support base 17 and is made of an elastic material. Next 2
Reference numeral 1 indicates a movable core pivotally connected to a support plate 18, and is made of the same material as the core body 2 of the fixed core 1. Further, 22 indicates its pivot axis. Furthermore, as clearly shown in FIG. 3, this movable core 21 is positioned at the center of the open end of the core body 2 in the fixed core 1, and a loop-shaped magnetic path is formed between the core body 2 and the movable core 21. The magnetic flux generated in the core body 2 is effectively applied to the movable core 21 so that the movable core 21 can obtain sufficient rotational torque. The movable iron core 21 is configured to be able to change its position between a normal position shown in solid lines in FIGS. 1 to 3 and a display position shown in FIG. 4. In addition, in the state in which the core 21 is located at each position, the corner portion of the iron core 21 is connected to the normal position receiving portion and the operating position receiving portion such as the receiving portion 23 of the upper support stand 16 or the receiving portion 24 of the lower support stand 17. It is arranged such that it is stopped at each position and is prevented from rotating beyond each position. Reference numeral 25 denotes a tension spring, one end (upper end) of which is fixed to the upper support base 16 with a fastener 26. The other end (lower end) is fixed to the movable iron core 21 with a fastener 27. Further, the fixed position of the tension spring 25 is the same as that of the movable iron core 21 when the movable iron core 21 is in the normal position as shown in FIG.
1 in the direction of arrow 38 to hold the movable core 21 in its normal position, and when the movable core 21 is located at the indicated position as shown in FIG. The movable iron core 21 is selected such that a force is applied to the movable core 21 to hold the movable core 21 at the display position. That is, in the process of the movable iron core 21 rotating between the normal position and the display position, those fixed positions are determined by a straight line connecting the two fixed positions.
It is set in a position where it can be moved beyond the pivot point. The fasteners 26 and 27 are constructed with threaded rods. Reference numeral 28 denotes a locking pin attached to the movable core 21, which is made of a threaded rod. Next 31
The display board is made of a lightweight synthetic resin material, and is mounted so as to be movable vertically in a guide groove 32 formed in the case body 15. 3
Reference numeral 3 denotes a guide hole in which a guide piece 34 fixed to the lower support stand 17 is placed so as to guide movement of the display board 31 in the vertical direction. 3
5 is a longitudinal groove, and 36 is a horizontal groove, in which the locking pin 28 is left. Reference numeral 37 denotes a return piece, which is formed by the lower edge of the longitudinal groove 35 and the lower edge of the lateral groove 36. The return piece 37 is formed obliquely as shown. When the device having the above structure is attached to a power distribution line, the attachment is performed as shown in A to C in FIG. 6. First, with the case body 14 pulled out from the fixed iron core 1, the fixed iron core 1 is placed over the distribution line 7 as shown in FIG. 6A. Next, as shown in FIG. 6B, the case body 14 is inserted into the inner pocket of the fixed iron core 1 from the open end side. In this case, it goes without saying that the leg 1 of the fixed core
a fits into the fitting groove 19. When the case body 14 is further pushed into the inner pocket of the fixed iron core 1, the engagement piece 20 snaps into engagement with the engagement recess 5, and the fixed iron core 1 and the case body 14 are integrated. After that, the butterfly bolt 10 is turned to tighten the power distribution line 7 between the holding piece 11 and the receiving piece 8. This completes the attachment to the power distribution line 7.

Next, the operation of the display device having the above configuration will be explained. First, in the normal state, the movable core 21 is located in the normal position as shown in FIGS. 1 to 3,
This state is maintained by the tension spring 25 as described above. Moreover, in this state, the display board 31
Since the locking pin 28 is located in the horizontal groove 36 , the upper edge 36 a of the horizontal groove 36 is locked by the locking pin 28 , and the display plate 31 is held in a state built in the case body 15 .

Next, when an overcurrent flows through the distribution line 7 in the above state, the magnetic flux due to it is transferred to the core body 2 of the fixed core 1.
and passes through the movable iron core 21. As a result, a force acting on the movable core 21 in the direction of arrow 40 and greater than the biasing force of the tension spring 25 causes the movable core 21 to rotate in the direction of arrow 40 and to the display position shown in FIG. do. As a result, the locking pin 28 is disengaged from the horizontal groove 36 and positioned within the longitudinal groove 35. Therefore, the display board 31 is released from its locked state and falls downward as shown in FIG. As a result, the lower part of the display panel 31 protrudes significantly downward from the case body 14. The protruding portions of the display board 31 may be colored or covered with night reflective tape so that the protrusions can be clearly seen. The overcurrent at which the above operation is performed is set to, for example, 700 to 950 amperes, and the time period is set such that the operation is performed for 0.5 seconds or more. Note that this value can be arbitrarily changed by adjusting the strength of the tension spring 25. Furthermore, when the movable core 21 rolls from the normal position to the display position as described above, the biasing direction of the tension spring 25 against the movable core 21 moves beyond its dead center (the position of the pivot shaft 22). (changes from the direction of arrow 38 to the directions of arrows 39 and 40). Therefore, when the movable core 21 is located at the display position as shown in FIG. work. Therefore, the display board 31
The protruding state of is maintained as it is.

Next, after the indication that an overcurrent has flowed as described above is made and the corresponding measures have been taken, the display board, which is in the protruding state as shown in FIG. It is housed in the case body 14 as shown in FIG. In this case, the display board 31
By pushing upward from the bottom with your fingers,
As shown in FIG. 5, the locking pin 28 is pushed up by the oblique return piece 37, and the movable core 21 is rotated in the direction of the arrow 41. Therefore, the locking pin 28 is again located in the horizontal groove 36 as described above.
In this case, the biasing direction of the tension spring 25 against the movable core 21 moves beyond the dead center (the position of the pivot shaft 22) (changes from the direction of arrow 39 to the direction of arrow 38), so when the direction of the tension spring 25 is moved beyond the dead center (the position of the pivot shaft 22), the spring 25 The movable core 21 is rotated in the direction of arrow 41 by the tensile force of
The movement is reliably carried out to the state where it comes into contact with 3.

As described above, in this invention, when an overcurrent flows through the distribution line 7, the movable iron core 21
rotates and the locking pin 28 engages the vertical groove 3 of the display board 31.
5, the display panel 31 can be lowered to a state where it projects downward from the case body 14, and the lowered state can be maintained as it is. This allows the patrol officer to check the protruding display board 31.
By looking at this, it is possible to know that an overcurrent has flowed in the past, which has the effect of allowing countermeasures to be taken.

Moreover, when the display board 31 is lowered as described above, the locking pin 28 is attached to the movable core 21 and moves in an arc, so the vertical movement component of the locking pin 28 is only small. Even if the locking pin 28 has a structure in which the locking pin 28 is
The display board 31 is moved from the horizontal groove 36 to the vertical groove 35 to enable the display board 31 to be lowered, so the display board 31 is lowered significantly by using the vertical groove 35 provided in the display board 31. This allows the projecting dimension from the case body 14 to be increased, which has the effect of making it easier to see from a distance, for example, making it possible to easily recognize the display board 31 located at a high place from the ground. be.

Furthermore, in the present invention, when a maintenance worker wants to restore the protruding display board 31, he pushes up the display board 31 that protrudes downward and removes the case body 1.
4, the locking pin 28
It is possible to push up with the return piece 37 and return it to the original position (positioned in the horizontal groove 36) as described above, and make it possible to perform the display operation again. There is also the effect of

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a partially cutaway front view of the case body, FIG. 2 is a cross-sectional view taken along the - line, FIG. 3 is a cross-sectional view taken along the - line, and FIG. A schematic diagram showing the display board 31 protruding from the case body, FIG. 5 is a schematic diagram showing the display board being returned to the case body, and FIG. 6 is a schematic diagram showing the display board being attached to the power distribution line. A diagram showing the process of doing so. DESCRIPTION OF SYMBOLS 1... Fixed iron core, 7... Distribution line, 21... Movable iron core, 28... Locking pin, 31... Display board, 35
...Vertical groove, 36...Horizontal groove.

Claims (1)

[Scope of utility model registration request] The inverted U-shaped fixed core is equipped with a fixture for fixing the distribution line located in the space above the inner pocket of the fixed core, and the two legs of the fixed core are attached to the lower part of the inner pocket of the fixed core. The display board is provided with a display board that is parallel to the surface connecting the parts, and the display board is provided with a vertical groove and a horizontal groove that communicates with the lower end of the vertical groove. The movable iron core is configured to be vertically movable so as to be able to appear and retract, and furthermore, a movable iron core is pivoted to the case body in parallel with the display board so as to be freely rotatable between the normal position and the display position. In addition, a normal position receiving portion and an operating position receiving portion are provided to prevent the movable iron core from rotating beyond the normal position and from rotating beyond the indicated position, respectively. A tension spring having one end fixed to the movable core and the other end fixed to the case body, the fixed positions of which are fixed during the process of rotation of the movable core between the normal position and the display position. is provided with a tension spring set at a position where a straight line connecting both fixing positions can move beyond the pivot point of the movable core, and furthermore, from the surface of the movable core facing the display plate, A locking pin having a length that allows the tip to be selectively positioned in the longitudinal groove and the horizontal groove is provided protrudingly, and the position of the locking pin is above the pivot point when the movable core is in the normal position. and is in contact with the upper edge of the horizontal groove, and is set at a position on the movement locus of the vertical groove when the movable iron core is at the display position, and the lower edge of the vertical groove and the lower edge of the horizontal groove are An overcurrent passage indicator for a power distribution line, characterized in that the locking pin is continuously pushed up.