JPH0259577B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fault indicator, and more particularly to a fault indicator that operates a magnetically driven switch for a short period of time in response to operation of the device.

[Background of the invention]

An example according to the prior art will be described with reference to FIGS. 1 to 5.

Figure 1 shows the front side of the fault indicator. There is a display window 1A and a return lever hole 1B in the center of the case 1, and a display board return lever 1 is located in the return lever hole 1B.
There is 0E. FIG. 2 shows the internal mechanism of the failure indicator, and the mechanism part disposed on the base 2 is housed in the case 1, and is designed to display information on the display window 1A on the front surface of the case 1.

When a failure occurs, a failure response relay (not shown)
When the contact is closed and the power supply voltage is applied to the coil terminal 3, the operating coil 6 is excited through the coil lead 4 connected to the coil terminal 3. The operating coil 6 is wound around the bobbin 5, and an inverted L-shaped yoke 7 is arranged below the bobbin 5, and an armature shaft is attached to the inverted L-shaped front part 5A below the bobbin 5. 1
An armature 9 is attached so that it can rotate at 1, and an iron core 8 is placed at the center of the bobbin 5.
Its rear part is connected to a yoke 7.

On the other hand, at the rear part 5B of the bobbin 5, there is a display plate shaft 12.
A display board 10 is attached so that it can be rotated at. The base 2 also includes an upper fixed contact piece 14.
A, upper movable contact piece 15A, lower fixed contact piece 14
B. A lower movable contact piece 15B is arranged, and when there is no external force, the fixed contact piece and the movable contact piece come into contact with each other due to the elasticity of the movable contact piece.

When the operating coil 6 is excited by the operation of the device, a magnetic path is formed by the iron core 8 made of a magnetic material, the yoke 7, and the armature 9, and the armature 9 is attracted to the iron core 8, but the operation When coil 6 is not energized, return spring 1
3, the armature 9 is separated from the iron core 8, and the projection 9A of the armature 9 hits the yoke 7 and stops.

In the display board 10, the display board holding piece 10D is connected to the armature 9.
In normal conditions, the fall of the upper movable contact piece 15A is prevented, and the upper movable contact piece 15A is engaged with the upper movable contact insulation 16A at the tip of the upper fixed contact piece 14A.
The upper movable contact piece 15A is separated from the upper movable contact piece 15A.

The display board 10 has a normal display section 10A and a failure display section 10B, which can be distinguished by painting or the like.

When a failure occurs, the armature 9 is attracted to the iron core 8, the engagement between the armature 9 and the display board holding piece 10D is released, and the display board 10 falls due to gravity. When the display board 10 falls and the engagement between the display board 10 and the upper movable contact insulation 16A is released, the upper fixed contact piece 14A and the upper movable contact piece 15A come into contact.

Upper fixed contact piece 14A and lower fixed contact piece 14
B is connected by a connecting line 17. Upper fixed contact piece 14A, upper movable contact piece 15A, lower fixed contact piece 14B, lower movable contact piece 15B, connection line 17
are made of a conductor, so while the display board 10 is falling, the upper movable contact piece 15A, the upper fixed contact piece 14A, the connection wire 17, the lower fixed contact piece 14B,
The lower movable contact piece 15B is electrically closed and can send a signal to an external circuit, as shown in FIG. 3.

When the display board 10 further falls due to gravity from the state shown in FIG.
The arm portion 10C of the bobbin 5 rests against a protrusion 5C on the inverted L-shaped front portion of the bobbin 5. At this time, the contact between the lower fixed contact 14B and the lower movable contact 15B is separated, so the signal to the external circuit is cut off and the display window 1
A failure display section 10B of the display board 10 is displayed. This state is shown in FIG.

Due to failure recovery, failure response relay (not shown)
When it returns, the operating coil 6 becomes non-excited, and the armature 9 is separated from the iron core 8 by the return spring 13. This state is shown in FIG. When the display board return lever 10E of the display board 10 is pushed upward from this state, the armature 9 compresses the return spring 13 by the amount that the armature 9 engages with the display board holding piece 10D. When the armature 9 rises further upward, the return spring 13 returns the armature 9 to the position where the armature protrusion 9A touches the yoke 7, and the display board return lever 10
Even if the external force pushing up E is removed, display board 1
Since the armature 9 and the display plate holding piece 10D engage with each other, the display window 1A is held at a position where the normal display portion 10A is displayed, and the state shown in FIG. 2 before the failure occurs is maintained.

In a fault indicator configured in this manner, when a fault occurs, the display board 10 falls and generates a signal to an external circuit, and when the fault is recovered, a return operation is performed to push the display board 10 upward. Even if a failure occurs again in the past, there is a drawback that it is not possible to generate a signal to the external circuit at this time.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a fault indicator that can generate a fault signal regardless of the position of the display board.

[Summary of the invention]

The present invention operates the magnetically driven switch using the magnetic flux of the operating coil when a failure occurs, operates the magnetic induction piece through the operation of the armature, and restores the operation of the magnetically driven switch. It is designed to generate a signal to.

[Embodiments of the invention]

Examples according to the present invention will be explained with reference to FIGS. 6 to 11.

FIG. 6 shows the front side of the fault indicator. There is a display window 1A and a return lever hole 1B in the center of the case 1, and a display plate return lever 1 is located in the return lever hole 1B.
There is 0E. FIG. 7 shows the internal mechanism of the failure indicator. The mechanism part arranged on the base 2 is housed in the case 1, and is adapted to display information on the display window 1A on the front side of the case 1.

When a failure occurs, a failure response relay (not shown)
When the contact is closed and the power supply voltage is applied to the coil terminal 3, the operating coil 6 is excited through the coil lead 4 connected to the coil terminal 3. The operating coil 6 is wound around the bobbin 5, and an inverted L-shaped yoke 7 is arranged below the bobbin 5, and the armature shaft 1 is attached to the inverted L-shaped front part 5A at the tip of the bobbin 5.
An armature 9 is attached so that it can rotate at 1. Further, a display plate 10 is attached to the rear portion 5B of the bobbin 5 so as to be rotatable about a display plate shaft 12.

Therefore, when the working coil 6 is excited, a magnetic path is formed by the iron core 8 made of a magnetic material, the yoke 7, and the armature 9, and the armature 9 is attracted to the iron core 8, but the working coil 6 When is not energized, the armature 9 is pulled away from the iron core 8 by the return spring 13, and the projection 9A of the armature 9 hits the yoke 7 and stops.

In the display board 10, the display board holding piece 10D is connected to the armature 9.
Under normal conditions, it is prevented from falling. Further, the display board 10 has a normal display section 10A and a failure display section 10B, which can be distinguished by painting or the like.

Between the front part 5A and rear part 5B of the bobbin 5, a pair of conductive magnetic leads 18A and 18B are made so as to be elastically movable, and are sealed in the tube 18C with appropriate overlap and gap. A magnetically driven switch 18 is arranged.

The structure of the magnetic drive switch 18 is shown in FIG.

The conductive magnetic leads 18A and 18B of this magnetically driven switch 18 are connected to the contact leads 2, respectively.
3, it is connected to the contact terminal 22 so that it can be connected to an external circuit.

When a failure occurs, the operating coil 6 forms a magnetic path with the yoke 7, iron core 8, and armature 9. At this time, the magnetic flux generated from the operating coil 6 causes the magnetically driven switch 1 disposed near the operating coil 6 to
Conductive magnetic leads 18A, 18 enclosed in 8
B becomes magnetized, attracts each other and comes into contact, forming a signal circuit. At this time, the armature 9 is attracted to the iron core 8, so the armature 9 is disengaged from the display plate holding piece 10D, and the display plate 10 falls due to gravity, causing the inverted L-shaped front part of the bobbin 5 to fall. The display plate 10 is placed on the protrusion 5C of
The arm portion 10C of the object touches the object and comes to rest.

On the other hand, the magnetic induction piece support part 1 fixed to the yoke 7
Magnetic induction single shaft 2 supported so as to be rotatable at 9
0 includes a magnetic guiding piece 21 and a magnetic guiding piece engaging portion 2.
1A are connected together. Since the magnetic induction piece engaging portion 21A and the armature rear part 9B are engaged,
When the armature 9 is attracted to the iron core 8, the magnetic induction piece 2
1 rotates clockwise, so the armature 9 is connected to the iron core 8.
When completely attracted, the magnetic induction piece 21 made of a magnetic material enters between the magnetic drive switch 18 and the operating coil 6, so the magnetic flux generated from the operation coil 6 moves through the magnetic induction piece 21. pass. Therefore, the effect of the magnetic flux on the magnetically driven switch 18 is eliminated, the operation of the magnetically driven switch 18 is restored, and the signal circuit is released. At this time, the display on the display window 1A is
The normal display section 10A changes to the failure display section 10B. This state is shown in FIG.

Due to failure recovery, failure response relay (not shown)
When the armature 9 returns, the operating coil 6 becomes non-excited, and even if the armature 9 is separated from the iron core 8 by the return spring 13 and the magnetic induction piece 21 falls due to the return of the armature 9, the operating coil 6 remains unexcited. Since it is not energized, the magnetic drive switch 18 does not generate a signal. This state is shown in FIG.

When the display board return lever 10E is pushed upward due to failure recovery, the armature 9 is moved to the display board holding piece 1.
The return spring 13 is compressed by the amount that it engages with 0D, but when the display plate holding piece 10D rises above the armature 9, the armature 9 is returned to the position where the armature protrusion 9A contacts the yoke 7 by the return spring 13. Even if the external force pushing up the display board return lever 10E is removed, the display board 10 will not move with the armature 9 and the display board holding piece 1.
Since 0D is engaged, the normal display section 1 is displayed on the display window 1A.
It is held at the position where 0A is displayed, resulting in the state shown in FIG. 7 before the failure occurred.

FIG. 10 shows the internal mechanism of the fault indicator when FIG. 9 is viewed from the bottom.

According to one embodiment of the present invention, the operating coil 6 that is energized when a fault occurs and the armature 9 that is energized by the excitation of the operating coil 6 generate magnetism each time a fault occurs, regardless of the position of the display board 6. Drive switch 18
Since it is possible to generate signals from the machine, it has the effect of allowing accurate maintenance of equipment.

In this embodiment, the magnetic induction piece is made of a magnetic material, but a permanent magnet is attached to the magnetic induction piece at a position adjacent to the magnetically driven switch to generate a magnetic flux with a polarity opposite to that of the operating coil, thereby controlling the operation of the magnetically driven switch. The same effect can be obtained since it is possible to restore the .

[Invention effect]

According to the present invention, it is possible to generate a signal each time a failure occurs regardless of the position of the display board, so there is an effect that accurate maintenance of equipment can be performed.

[Brief explanation of the drawing]

FIG. 1 is a front view of a failure indicator according to the prior art, and FIG. 2 is a side view showing the internal mechanism of FIG. 1 in a normal state. FIG. 3 shows a state in which the display board is falling due to the occurrence of the failure shown in FIG. FIG. 4 shows a state in which the dropping operation of the display board in FIG. 3 has been completed.
FIG. 5 shows a state in which the failure has been recovered from the state shown in FIG. 6 is a front view of the fault indicator according to the present invention, and FIG. 7 is a side view showing the internal mechanism of FIG. 6 in a normal state. FIG. 8 shows the state when the failure occurs in FIG. FIG. 9 shows a state in which the failure has been recovered from the state shown in FIG. FIG. 10 shows the internal mechanism of the failure indicator when FIG. 9 is viewed from the bottom. FIG. 11 shows the structure of the magnetic drive switch. 1...Case, 1A...Display window, 1B...Return lever hole, 2...Base, 3...Coil terminal, 4
... Coil lead, 5 ... Bobbin, 5A ... Bobbin front, 5B ... Bobbin rear, 5C ... Bobbin protrusion, 6 ... Operating coil, 7 ... Yoke, 8 ... Iron core, 9 ... Connection Pole, 9A... Armature protrusion, 9B
... Armature rear part, 10... Display board, 10A... Display board normal display section, 10B... Display board failure display section,
10C... Display plate arm, 10D... Display plate holding piece, 10E... Display plate return lever, 11... Armature shaft, 12... Display plate shaft, 13... Return spring, 1
4A... Upper fixed contact piece, 14B... Lower fixed contact piece, 15A... Upper movable contact piece, 15B... Lower movable contact piece, 16A... Upper movable contact piece insulation,
16B... Lower movable contact piece insulation, 17... Connection wire, 18... Magnetic drive switch, 18A... Magnetic lead, 18B... Magnetic lead, 18C...
Tube, 19... Magnetic induction piece support part, 20...
Magnetic induction single shaft, 21...Magnetic induction piece, 21A...
Magnetic induction piece engaging portion, 22... Contact terminal, 23...
contact lead.

Claims (1)

[Claims] 1 A controlled device, an electromagnet that is energized by the operation of this device and is continuously energized while the device is in operation, an armature that is attracted by the energization of this electromagnet, and an armature that does not fall when the armature is operated. It consists of a display board that allows for a magnetic drive switch, a magnetically driven switch that is excited and operated by an electromagnet, and a magnetic induction piece that blocks the operation of the magnetically driven switch. A fault indicator that operates a magnetic induction piece to restore the operation of a magnetic drive switch.