JPH0324718B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a fault indicator, and more particularly, to a fault indicator that generates a signal each time a fault occurs, regardless of the display state of the fault indicator.

[Prior art]

An example according to the prior art will be explained with reference to FIGS. 1, 2, and 3. Figure 1 shows the front of the display, with a display window 1A and a return lever hole 1B located approximately in the center of the case 1, and a display panel return lever 1 inside 1B.
There is 1H. Figure 2 shows the internal mechanism of the display, and the mechanism part placed on the base 2 is connected to the case 1.
The display window 1A on the front side of the case 1 displays the display window 1A.

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 and a display plate 11 are both attached so that they can rotate at zero.

Therefore, when the operating coil 6 is excited, a magnetic path is formed by the iron core 8 composed of a magnetic pole body, the yoke 7, and the armature 9, and the armature 9 is attracted to the iron core 8.
When the operating coil 6 is not energized, the return spring 14 that engages with the locking fitting 13 causes the armature 9 to close to the iron core 8.
It is pulled away from the yoke and stops when it hits the tip of the yoke 7.

One end of an arcuate locking fitting 13 is rotatably fixed to the inverted L-shaped front portion 5A at the tip of the bobbin 5 by a locking fitting shaft 12, and an armature is attached to one end of the locking fitting 13. A return spring 14 attached to one end of 9 is attached.

The return spring 14 is engaged with the armature 9 and the locking fitting 13 so as to rotate in a counterclockwise direction, and the dimensions are arranged so that the rotational torque of the armature 9 is large.

The inner peripheral surface of this locking fitting 13 has stepped portions 13A, 1
3B is provided.

On the other hand, the display board 11 includes arc-shaped display parts 11C and 11D that display normality and failure occurrence, and a switch 16.
There are 11E, 11F, and 11G that engage with the display board arm 1, and a bar-shaped display board return lever 11H.
1A has an engagement hole 11 for passing the lock fitting 13.
B is provided. The return lever 11H provided on the display board 11 is used to push up the display board 11, which has fallen due to a failure, upward after the failure has been recovered.

A switch fixing piece 15 is provided on the inverted L-shaped front portion 5A of the bobbin 5, and a switch 16 is attached to the switch fixing piece 15.

The switch 16 is centered around the switch shaft 16A.
A switch lever 16B is rotatably fixed, a switch roller 16C is attached to one end, and a switch engaging portion 11E of the display board 11,
This switch lever 16B is designed to smoothly engage with the switches 11F and 11G, and the switch lever 16B is always connected to the engagement portions 11E, 11F, and 11G of the display board 11 with the switches 16 by the switch contact drive piece 16D.
pressed to the side.

The switch 16 is designed so that a contact output is obtained only when it engages with the switch engaging portion 11F of the display board 11, and the contact output is transmitted from the switch contact terminal 16E to the contact terminal 18 by a contact lead 17.
It is taken out. The yoke 7 and the iron core 8 are fixed to the base 2 together with the rear part 5B of the bobbin 5.

Normal operation When the coil 6 is not energized, the lock fitting 13
The stepped portion 13A engages with the engagement hole 11B of the display board 11 to prevent the display board 11 from falling.

In this state, the switch roller 16C is engaged with the switch engagement portion 11E of the display board 11,
Switch 16 is not generating contact output. In this state, as shown in FIG.
C is displayed.

When the operating coil 6 is excited and the armature 9 is attracted to the iron core 8 due to a failure, the locking fitting 13
is pulled by the return spring 14, so it rotates counterclockwise. During this time, the engagement hole 11B of the display board 11 and the stepped portion 13A of the locking metal fitting 13 are disengaged, the display board 11 falls due to the power, and the engagement hole 11B of the display plate 11 is connected to the locking metal fitting 13B. Engage and stop. In this state, 11D is displayed.

During the falling operation of the display board 11, the switch 16
The switch roller 16C successively engages with the switch engaging portions 11E to 11F and 11G of the display board 11, and only when the switch roller 16C engages with the switch 11F does the switch 16 generate a contact signal. Figure 3 shows the state after the failure occurs.

When the fault is recovered, the voltage applied to the coil terminal 3 disappears, so the operating coil 6 becomes de-energized, the armature 9 is separated from the iron core 8, and the locking fitting 13 is moved clockwise. Rotate to the position shown in Figure 2. In this state, when the return lever 11H of the display board 11 is pushed upward, the locking metal fitting 13 rotates counterclockwise by the amount of the protrusion of the stepped part 13A of the locking metal fitting 13. After passing through the protrusion, the locking metal fitting 13 rotates again. The lock fitting 13 rotates clockwise and engages with the stepped portion 13A and the engagement hole 11B of the display board 11, returning to the normal state.

In the display window 1A on the front of the case 1, the display part 11C of the display board 11 is displayed in the normal state, and the display part 11C in the case of a failure occurs.
1 on the display section 11D. Display section 11C,
11D can be identified by its paint color, etc.

In the fault indicator configured in this way, the display board 11 falls when a fault occurs and generates a contact signal, but the fault is recovered before the display board 11 is restored.
When a failure occurs again, the contact signal is not generated, that is, the display board 11
falls and generates a contact signal, but there is a drawback that even if the failure is recovered while the display board 11 is falling and a second failure occurs, no contact signal is generated.

[Purpose of the invention]

An object of the present invention is to provide a fault indicator that generates a contact signal each time a fault occurs, regardless of the position of the display board of the fault indicator.

[Summary of the invention]

The present invention applies stress to a spring member driven by the operation of an armature that is attracted by the energization of an electromagnet of a fault indicator, so that the spring member can be inverted from each other at two positions bordering on the dead center. When the armature is attracted by the energization of the electromagnet, the spring member contacts the driving part of the switch to operate it, and the spring member changes from one inverted state to the other by contact with the driving part. When the armature is in the reversed state and quickly separated from the drive unit, and the armature is released from the electromagnet by deenergization of the electromagnet, the spring member contacts the reverse operation member and changes from the other reversed state to the one reversed state. By configuring the contact point to return to , a contact signal is generated each time a failure occurs, regardless of the position of the display board.

[Embodiments of the invention]

Embodiments according to the present invention will be explained with reference to FIGS. 4 to 14.

Figure 4 shows the front of the display, with the display window 1A and return lever hole 1B located approximately in the center of the case 1.
Inside B is a display board return lever 22E. FIG. 5 shows the internal mechanism of the display, and the mechanism section disposed on the base 2 is housed in the case 1, and is designed to display information in the display window 1A on the front side of the case.

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 a bobbin 19, and an inverted L-shaped yoke 7 is arranged below the bobbin 19.
An armature 20 and a display plate 22 are both attached to an inverted L-shaped front part 19A at the tip of the bobbin 19 so as to be rotatable about an armature shaft 10.

Therefore, when the working coil 6 is excited, a magnetic path is formed by the iron core 8 composed of a magnetic pole body, the yoke 7, and the armature 20, and the armature 20 is attracted to the iron core 8, but the working coil When 6 is de-energized, lock fitting 1
The armature 20 is pulled away from the iron core 8 by the return spring 14 that engages with the armature 3, and comes to rest against the tip of the joint 7.

One end of an arcuate locking fitting 13 is rotatably fixed to an inverted L-shaped front portion 19A at the tip of the bobbin 19 by a locking fitting shaft 12, and an armature 20 is attached to one end of the locking fitting 13. Return spring 1 attached to one end of
4 is installed.

The return spring 14 is engaged with the armature 20 and the locking fitting 13 so as to rotate in a counterclockwise direction, and is arranged in such a relationship that the rotational torque of the armature 20 is large.

The inner peripheral surface of this locking fitting 13 has a stepped portion 13A,
13B is provided.

On the other hand, the display board 22 has arc-shaped display parts 22C and 22D that display normality and failure occurrence, and a bar-shaped display board return lever 22E.
A has an engagement hole 22B for passing the lock fitting 13.
is provided. The return lever 22E provided on the display board 22 is used to push up the display board 22, which has fallen due to a failure, upward after the failure has been recovered.

A switch fixing piece 23 is provided on the inverted L-shaped front part 19A of the bobbin 19.
A switch 24 is attached to the switch.

The switch 24 is designed so that a contact output is obtained at the switch contact terminal 24B only when the switch contact drive piece 24A is pushed to the left in FIG. 5. When the external force is removed, the switch contact drive piece 2
4A automatically returns to the right side in FIG. At this time, no contact output is generated.

The contact output is taken out from the switch contact terminal 24B to the contact terminal 18 via the contact lead 17.
The yoke 7 and the iron core 8 are fixed to the base 2 together with the rear part 19B of the bobbin 19.

Portion 20A of armature 20 that is attracted to iron core 8
The spring portion 20B extending in the opposite direction is formed by giving elasticity to a part of the armature 20.

As shown in FIGS. 11 and 12, the spring portion 20B
An end portion 21A of an elastic spring ring 21 is inserted into the hole 20C to apply stress to the spring portion 20B.

Normal operation When the coil 6 is not energized, the lock fitting 13
The stepped portion 13A engages with the engagement hole 22B of the display board 22 to prevent the display board 22 from falling.

In this state, the switch drive piece 24A is not in contact with the tip of the spring portion 20B of the armature 20;
Switch 24 is not generating contact output. In this state, as shown in FIG.
C is displayed.

When a failure occurs, the operating coil 6 is excited and the armature 20 is attracted to the iron core 8, and the locking fitting 13
is pulled by the return spring 14, so it rotates counterclockwise. During this time, the engagement hole 22B of the display board 22 and the stepped portion 13A of the locking metal fitting 13 are disengaged, the display board 22 falls due to gravity, and the engagement hole 22B of the display plate 22 engages with the locking metal fitting 13B. Engage and stop. In this state, 22D is displayed.

Figure 6 shows the state after the failure occurs.

Figure 7 shows the operation of the switch 24 when a failure occurs.
This will be explained with reference to FIG.

FIG. 7 shows a state before the occurrence of a fault. When the operating coil 6 is excited due to the occurrence of a fault, the armature 20
is attracted to the iron core 8. Therefore, the tip of the spring portion 20B of the armature 20 rotates clockwise, the switch drive piece 24A is pushed to the left in FIG. 7, and the switch 24 changes the contact output. This situation that occurs is shown in FIG. In the state shown in Fig. 8, the armature 20A
is not completely attracted to the iron core 8, and the armature 2
Immediately before 0A is completely attracted to the iron core 8, the spring portion 20B passes through the dead center, and when the armature 20A is completely attracted to the iron core 8, the tip of the spring portion 20B is reversed and the switch is driven. It separates from piece 24A and stands still. This state is shown in FIG.

When the fault is recovered and the operating coil 6 becomes non-energized and the armature 20A is released from the iron core 8, the spring portion 20B of the armature 20 rotates counterclockwise, so that the tip of the spring portion 20B , bobbin 1
9 comes into contact with the tip of the lower part 19C. This state is shown in FIG. From this state, since a further counterclockwise torque is applied by the return spring 14, until the armature 20 hits the tip of the yoke 7 and stops,
Rotate counterclockwise.

During this period, just before the armature 20 hits the tip of the yoke 7 and stops, the spring portion 20B passes through the dead center in the opposite direction to the operating direction, and the armature 20 hits the tip of the yoke 7 and stops. In this state, the tip of the spring portion 20B is reversed, separated from the tip of the lower part 19C of the bobbin 19, and comes to rest. In this state, the state shown in FIG. 7, which is the same as the state before the failure occurs, is reached.

In the fault indicator configured in this way, the operating coil 6 allows the
Since the switch 24 is operated by the operation of the spring portion 20B of the armature 20, a contact output of the switch 24 is obtained each time a failure occurs.

According to the present invention, a contact output can be obtained each time a failure occurs regardless of the position of the display board, so that equipment,
This has the effect of ensuring sufficient maintenance of the equipment.

In this example, stress is applied to the spring part by tension, but stress may also be applied by compression, and there are various methods of applying stress to the spring part by tension or compression other than this example. With this, the purpose can be achieved in the same way even if the dead center of the spring part is passed and the operation of the switch is reversed.

〔Effect of the invention〕

According to the present invention, a contact output can be obtained each time a failure occurs regardless of the position of the display board, so that a protection circuit and an alarm circuit can be configured, so that equipment and equipment can be sufficiently maintained. .

[Brief explanation of drawings]

Figures 1 to 3 show the prior art; Figure 1 shows the front of the failure indicator, Figures 2 and 3 are side views showing the internal mechanism of the failure indicator; During normal operation, FIG. 3 shows a state in which a failure occurs. 4 to 14 show an embodiment according to the present invention, FIG. 4 shows the front of the fault indicator, and FIGS. 5 and 6 are side views showing the internal mechanism of the fault indicator. , 5th
The figure shows the normal condition, and FIG. 6 shows the condition when a failure occurs. 7 to 10 are diagrams showing details of the operation of the armature spring section. 11 and 12 are diagrams showing details of the armature spring section, and FIG. 11 shows the side surface and the first
Figure 2 shows the back side. FIGS. 13 and 14 are views showing details of the spring ring, with FIG. 13 showing its side surface and FIG. 14 showing its back surface. 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, 6 ... Operating coil, 7 ... Yoke, 8 ... Iron core, 9 ... Armature, 1
0... Armature shaft, 11... Display plate, 11A... Display plate arm, 11B... Display plate engaging hole, 11C... Display plate display section, 11D... Display plate display section, 11E...
...Display board switch engaging part, 11F...Display board switch engaging part, 11G...Display board switch engaging part,
11H... Display plate return lever, 12... Locking metal fitting shaft, 13... Locking metal fitting, 13A... Locking metal fitting stepped part, 13B... Locking fitting stepped part, 14... Return spring, 15... Switch fixing piece, 16...Switch, 16A...Switch shaft, 16B...Switch lever, 16C...Switch roller, 16D...
Switch contact drive piece, 16E... Switch contact terminal, 17... Contact lead, 18... Contact terminal, 1
9...Bobbin, 19A...Bobbin front, 19B...
...Bobbin rear, 19C...Bobbin bottom, 20...
Armature, 20B... Armature spring part, 20C... Armature spring part hole, 21... Spring ring, 21A...
Spring ring end, 22...Display plate, 22A...Display plate arm, 22B...Display plate engagement hole, 22C...Display plate display section, 22D...Display plate display section, 22E...
...Display board return lever, 23...Switch fixing piece,
24...Switch, 24A...Switch contact drive piece, 24B...Switch contact terminal.

Claims (1)

[Claims] 1. A controlled device, an electromagnet that is energized by the operation of the controlled device and that is continuously energized during the operation of the controlled device, an armature that is attracted by the energization of this electromagnet, and this armature. a display board that is allowed to fall due to the action of the armature; a spring member that is driven by the action of the armature and that can be inverted at two positions bordering on the dead center due to stress; and this spring member. a switch that has a drive part that engages with the switch and is operated by the operation of a spring member; and a reversing actuation member that causes the spring member to operate in reverse, and the armature is attracted by the biasing of the electromagnet. In some cases, the spring member contacts the drive section of the switch to actuate the switch, and the spring member passes through the dead center from one inverted state to the other inverted state due to the contact with the drive section. When the armature is released from the electrode stone by being separated from the driving part and the electromagnet is deenergized, the spring member comes into contact with the reversing actuating member and passes through the dead center from the other inverted state to turn one of the armatures. A fault indicator characterized in that it is configured to return to an inverted state.