JP5198943B2 - Lightning strike display device - Google Patents

Description

  The present invention relates to a lightning strike indicator that is attached to a steel tower or the like such as a power transmission line and can easily visually recognize the number of lightning strikes.

In order to efficiently perform maintenance and inspection by lightning strikes and recovery work from a flashover accident, each steel tower as shown in Patent Document 1 is provided with a lightning strike indicator.
When a lightning strike is detected, this indicator unlocks the locking pin, rotates the display body receiver in the opening direction by its own weight and the weight of the display body receiver, exposes the display body to the outside, and Is configured to display.
JP 2002-51450 A

However, since only one display body is accommodated, there is a problem that it cannot be displayed for the second and subsequent lightning strikes. Although it is conceivable to accommodate a plurality of the same display bodies in a case for such a problem, there is a problem that the size is increased.
The present invention has been made in view of such problems, and an object thereof is to provide a lightning strike indicator capable of reliably displaying a plurality of lightning strikes.

In order to achieve such a problem, in the present invention, the case that has a display window and can be attached to a lightning strike detection target object has a length that can display a plurality of lightning strikes, and one winding drum. A display band in which a pattern having a different form is formed for each winding portion, a storage drum for storing the display band, the winding of the display band by a predetermined length, and the position disposed opposite to the display window Winding drum, lightning strike detection means for detecting a lightning strike and outputting a drive signal, energy storage means made of an elastic body, and at least the storage area of the energy storage means is changed by the drive signal in the display area of the winding drum And a driving mechanism for causing the display band to perform a display operation by the driving signal.

  According to the present invention, the mechanical energy stored in advance in the energy storage means is released and the display band is moved by a predetermined amount, so that no electric energy is required for driving the display means, and many lightning strikes over a long period of time. Can be displayed by distinguishing each lightning strike.

Embodiments of the present invention will be described below with reference to the drawings.
FIGS. 1 and 2 show an embodiment of a lightning strike indicator 1 according to the present invention, and FIGS. 3 and 4 are simplified configuration diagrams showing a main mechanism. A take-up geared motor, which will be described later, is disposed in the gap between the two drums 21 and 23. However, in order to simplify the structure in FIG. 3, the motor 34 is disposed below. It is shown.
A display window 13 that allows a display band 22 to be described later to be easily seen from the outside is formed in a case 12 having a metal fitting 11 that is fixed to an object to be monitored for lightning strikes, such as a steel tower.

2 shows the structure viewed from the rear side, and FIG. 3 shows the structure viewed from the side. A winding drum 21 that also serves as a display drum is located at the position facing the display window 13, and The storage drum 23 for storing the display band 22 is arranged in parallel.
A driving drum 24 that rotates while receiving the urging force of the belt-like spring 31 is connected to one end of the rotating shaft 21a of the winding drum 21 and, in this embodiment, the lower side. The other end side of the belt-like spring 31 is connected to an accommodation drum 25 that is accommodated in a stored state. The accommodation drum 25 is connected to the geared motor 34 via the transmission means 32, and the storage drum 23 is connected to the geared motor 34 via the clutch mechanism 26 on the lower end side of the rotating shaft 23a.

  The take-up drum 21 is connected to a rotating shaft 21a by a cam plate 37 that is coupled to a claw 36 that is driven by a solenoid 35 and contacts and separates. The claw 36 controls the rotation of the winding drum 21. The claw 36 is configured to move to a position where it can be removed from the recess 37a (FIG. 5) of the cam plate 37 when the solenoid 35 is excited to release the restraint of the driving drum 24.

  In this embodiment, the cam plate 37 has only one recess 37a. However, the cam plate 37 may be rotated so that the display area of the display window 13 is switched, and a plurality of recesses 37a of the cam plate 37 are formed at equal intervals. Also has the same effect.

  The case 12 houses a lightning detection sensor and circuit means (not shown) for driving and controlling the lightning display operation by a lightning detection signal of this sensor. Since these lightning detection sensors and the lightning display drive control circuit are well known, the description thereof is omitted. A battery 14 for driving the circuit means and the solenoid 35 is housed. The battery 14 can be configured to be charged at all times by installing a solar cell outside.

In this embodiment, when a lightning strike is detected by the lightning strike detection sensor, the solenoid 35 is excited. This excitation is preferably a pulse with a movement amount sufficient to retract the claw 36 from the recess 37a of the cam plate 37 and a time sufficient to move the claw 36 away from the recess 37a and move to the peripheral surface of the cam plate 37. It is preferable. As a result, the claw 36 is detached from the recess 37 a of the cam plate 37, the cam plate 37 is rotated, the claw 36 contacts the circumferential surface of the cam plate 37, and thereafter the belt-like spring 31 until the recess 37 a faces the claw 36. Rotates with the stored energy.
In this state, since the clutch 26 is disconnected from the motor 34 and the receiving drum 25, energy consumption other than winding the display band 22 is prevented as much as possible.

As a result, the winding drum 21 starts to rotate by the torque of the energy storage means 3 and winds the display band 22 of the storage drum 23 by a predetermined length, that is, one rotation of the winding drum 21 in this embodiment. The cam plate 37 rotates in synchronization with the rotation of the winding drum 21, and when the stepped portion 37 a of the cam plate 37 faces the claw 36, the claw 36 falls into the stepped portion 37 a and restrains the cam plate 37.
As a result, a new pattern or color moves on the surface of the winding drum 21, and a new pattern or color is displayed from the window 13. Needless to say, by associating these patterns, colors, and times with each other, it is possible to easily know the number of times of lightning strikes.

  Since the take-up drum 21 is driven by the mechanical energy stored in advance in the energy storage means in this way, almost no electric power is required to drive the display band 22 that requires as much energy as possible. Consumption can be suppressed as much as possible.

  Thereafter, the above operation is repeated each time a lightning strike is detected, and each time a lightning strike occurs, a different pattern or color of the display band 22 is exposed from the display window 13 to display the number of lightning strikes.

  When the entire area of the display band 22 is wound on the winding drum 21 in this way, an external power source is connected to the external terminal 41 to operate the clutch 26 to connect the geared motor 34 and the storage drum 23, The geared motor 34 is driven. As a result, the display band 22 wound around the winding drum 21 is rewound onto the storage drum 23, and at the same time, the band spring 31 of the energy storage means is wound up and stored.

Although it is configured a strip spring 31 of the biasing means to wind the motor 34 in the embodiment described above, it achieves the same effect be rotated by detachable lever to the drive shaft 38.

It is a perspective view which shows the external appearance of the lightning strike indicator of this invention. Drawing (A) and (B) are the top views seen from the back side and the top view seen from the side which show one example of a lightning strike indicator same as the above, respectively. It is the figure which looked at the main mechanism part of the same thunderbolt indicator from the side. It is the figure seen from the bottom face of the main mechanism part same as the above. It is a figure which shows one Example of the cam board of an apparatus same as the above.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Thunderbolt indicator 3 Power storage means 11 Fixing metal fittings 12 Case 13 Display window 21 Winding drum 22 Display belt 23 Storage drum 31 Band-shaped spring 34 Motor 35 Solenoid 36 Claw 37 Cam plate

Claims (3)

A display band that has a display window and has a length capable of displaying a plurality of lightning strokes and a pattern having a different form for each winding of the winding drum in a case that can be attached to a lightning detection target. A storage drum for storing the display band; a winding drum that winds the display band by a predetermined length; and a winding drum that is disposed at a position facing the display window; Lightning strike detection means to perform,
An accumulating means comprising an elastic body, and a control mechanism for releasing the stock of the accumulating means by the drive signal so as to move at least to the extent that the display area of the winding drum is changed. Drive means for performing a display operation on the display band;
Lightning display device that is composed of. The said control mechanism is comprised from the cam plate which interlock | cooperates with rotation of the said winding drum, and has a recessed part, the nail | claw which detaches | leaves from the said recessed part, and the electromagnetic drive means which makes the said nail | claw perform a detachment | leave operation | movement. The lightning strike display device according to 1. The lightning strike display device according to claim 1, wherein a driving unit that is rotated by energy from the outside is connected to the driving unit.

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