JPS6024948B2 - Fault indicator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fault indicator and, more particularly, to a fault indicator that can provide an operating output only for a predetermined period of time.

An embodiment based on the follower technology will be described with reference to FIGS. 1, 2, and 3.

Figure 1 shows the front side of the display, and there is a display window IA and a return bar hole IB approximately in the center of the case, and within IB there is a display board return lever. FIG. 2 shows the internal mechanism of the display, and the mechanism section disposed on the base 2 is housed in a case so as to display information in the display window IA on the front surface of the case 1. When a fault occurs, the contacts of the fault response relay (not shown) open, and the power supply voltage is applied to the coil terminal 3. When the coil lead 4 connected to the coil terminal 3
Then, the operating coil 6 is energized.

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 10 is attached to the inverted L-shaped front part 5A at the tip of the bobbin 5. The figure pole 9 and the display plate 11 are both attached so that they can be rotated.
Therefore, when the working coil 6 is excited, the iron core 8 composed of a magnetic pole body, the yoke 7, and the bushing pole piece 9 form a passage, and the exciting pole piece 9 is attracted to the iron core 8, but the working coil 6 When is not energized, the winding pole 9 is separated from the iron core 8 by the return spring 14 that engages with the locking fitting 13, hits the tip of the yoke 7, and stops.

One end of an arc-shaped locking metal fitting 13 is rotatably fixed to the inverted L-shaped front part 5A at the tip of the bobbin 5 by a locking metal fitting shaft 12, and one end of the locking metal fitting '3 is rotatably fixed to the locking metal fitting '3. A return spring 14 is attached to one end of the pole 9. The return spring 14 is engaged with the armature 9 and the locking fitting 13 so as to rotate in the counterclockwise direction, and is arranged in such a relationship that the rotational torque of the rear pole 9 is large.

The locking fitting 13 is provided with stepped portions 13A and 13B on its inner circumferential surface.

On the other hand, the display board 11 includes arc-shaped display parts 11C and 11D that display normality and occurrence of a failure, and display parts 11C and 11D that are engaged with the switch 16.
E, 11F, 11G, and a comb-shaped display board return lever 11 are provided, and the display board arm 11A is provided with an engagement hole 118 through which the lock fitting 13 is passed.

The return lever 11 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. Inverted L-shaped front part 5A of bobbin 5
is provided with a switch fixing piece 15, and a switch 16 is attached to the switch fixing piece 15.

The switch 16 is fixed such that a switch lever 16B rotates around a switch shaft 16A, and a switch roller 16C is attached to one end, and the switch engaging portions 11E, 11F of the display board 11, 11G can be engaged smoothly, and this switch lever 16B
The switch contact drive piece 16D keeps the display board 1
It is pressed against the engaging portions 118, 11F, and 11G of the first switch 16.

The switch 16 is designed to provide a contact output only when engaged with the switch engaging portion 11F of the display board 11, and the contact output is taken out from the switch contact terminal 16E to the contact terminal 18 via the contact lead 17. be done.

The yoke 7 and the iron core 8 are attached to the base 2 together with the rear part 5B of the bobbin 5.
Fixed to . When the normally operating coil 6 is not energized, the stepped portion 13A of the lock fitting 13 is connected to the engagement hole 118 of the display board 11.
, and prevents the display board 11 from falling.

In this state, the switch roller 16C is engaged with the switch engaging portion 11E of the display board 11, and the switch 16 is not generating a contact output.

In this state, as shown in FIG. 2, 11C is displayed on the display window IA. When a failure occurs, the operating coil 6 is energized and the warm pole element 9 is attracted to the iron core 8.
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 locking fitting 13
The engagement of the stepped portion 13A is disengaged, the display board 11 falls due to gravity, and the engagement hole 11B of the display board 11 engages with the locking fitting 13B and stops. In this state, 11D is displayed. During the falling operation of the display board 11, the switch roller 6C of the switch 16 successively engages with the switch engaging portions 11E to 11F and 11G of the display board 11, and only when engaged with 11F, the switch 16 contacts the switch 16. Generate a 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 11 of the display board 11 is pushed upward, the locking metal fitting 13 rotates counterclockwise by the amount of the protrusion of the stepped portion 13A of the locking metal fitting 13, but after passing the protrusion, the locking metal fitting 13 rotates counterclockwise. , the locking fitting 13 rotates clockwise again, and the step part 13A
Then, it engages with the matching hole 118 of the display board 11 and returns to the normal state. The display window IA on the front of case 1 shows the following information during normal operation.
The display section 11C of the display board 11 displays a message on the display section 11D of the display board 11 when a failure occurs.

The display sections 11C and 11D can be identified by their paint colors and the like. In the fault indicator configured in this way, the contact signal when a fault occurs may be short-lived or continuous, and each time the contact signal is
It is necessary to change the length of F, and also when pushing up the display board 11, the switch engaging portion 11F of the display board 11 engages with the switch roller 6C of the switch 16, so a contact signal is generated. . Normally, a contact signal is not required during a return operation, and a mechanism (not shown) for blocking this contact signal is required, which has the disadvantage that the failure indicator becomes expensive. An object of the present invention is to provide a failure indicator that can generate a short-time contact signal only when a failure occurs.

In the present invention, the switch is actuated by an actuating lever that is connected to the display board.

Embodiments of the present invention will be explained with reference to FIGS. 4 to 11.
The mechanism section placed on the base 2 is housed in the case 1,
The information is displayed on the display window IA on the front of the case.

When a failure occurs, the contacts of the defective camphor-responsive relay (not shown) are closed, power supply voltage is applied to the coil terminal 3, and 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 20', and an inverted L-shaped yoke 7 is arranged below the bobbin 20, and a saddle pole shaft is attached to the inverted L-shaped front part 20A at the tip of the bobbin 20. 1. A saddle pole 9 and a display plate 21 are attached to the trowel so that it can be rotated. Therefore, when the working coil 6 is energized,
A magnetic path is formed by an iron core 8, a magnetic iron 7, and an armature 9, and the armature 9 is attracted to the iron core 8, but when the operating coil 6 is not energized, the lock fitting 13 The return spring 14 engaged with the yoke 9 pulls the bush pole 9 away from the iron core 8, and
It stops when it hits the tip of the

One end of an arc-shaped locking fitting 13 is rotatably fixed to an inverted L-shaped front portion 20A at the tip of the bobbin 20 by a locking fitting 12, and an armature 9 is attached to one end of the locking fitting 13. A return spring 14 is attached to one end of the . The return spring 14 is engaged with the front pole element 9 and the locking fitting 13 so as to rotate in the counterclockwise direction, and is arranged in such a relationship that the rotational torque of the rear pole element 9 is large. The inner circumferential surface of this locking fitting 13 is provided with stepped portions 13A and 13B.

On the other hand, the display board 21 includes arc-shaped display parts 21C and 21D that display normality and occurrence of a failure, and a display part 21 that engages with the switch 23.
E and a rod-shaped display board return lever 21F, and the display board arm 21A has an engagement hole 2 for passing the locking fitting 13.
1B is provided.

The return lever 21F provided on the display board 21 is used to push up the display board 21, which has fallen due to a failure, upward after the failure has been recovered.

A switch holding piece 22 is provided on the inverted L-shaped front portion 20A of the bobbin 20, and a switch 23 is attached to the switch fixing piece 22.

The switch 23 is fixed such that a switch lever 23B can rotate around a switch shaft 23A, and a switch roller 23C is attached to one end.

An actuating lever 25 is further rotatably attached to the inverted L-shaped front portion 20A of the bobbin 20 by an actuating lever shaft 24, and includes a portion 25A that engages with the inner circumferential surface of the display plate 21, and a switch roller 23C. and an engaging portion 25B.

The switch 23 is designed so that only when the inner circumferential surface of the display section 21C of the display board 11 and the display board engagement section 25A of the operating lever 25 engage, torque is transmitted by the switch engagement section 25B and a contact output is obtained. The contact output is taken out from the switch contact terminal 23E 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 208 of the bobbin 20.

When the normally operating coil 6 is not energized, the stepped portion 1 of the locking fitting 13
3A engages with the engagement hole 21B of the display board 21, and the display board 1
1 is prevented from falling.

In this state, the display plate engaging portion 25A of the operating lever 25 is engaged with the inner peripheral surface of the operating lever engaging portion 21E of the display plate 21, and the switch 23 is not generating a contact output.
The state is shown in FIG.

When a failure occurs, the operating coil 6 is excited and Shigeko Yabu 9 is attracted to the iron core 8, and the locking fitting 13 is activated by the return spring 14.
During this period, the engagement hole 21B of the display board 21 and the stepped portion 13A of the lock fitting 13 are disengaged, and the display board 21 falls due to gravity. The engagement hole 21B of the display plate 21 is connected to the stepped portion 1 of the lock fitting 13.
It engages with 3B and stops. Only when the inner peripheral surface of the display part 21C and the display plate engaging part 25A of the operating lever 25 engage with each other during the dropping operation of the display board 21, the switch 23 is activated by the switch engaging part 25B of the operating lever 25. Generates a contact signal.

Figure 6 shows the state after the failure occurs. When the failure is recovered,
Since the voltage applied to the coil terminal 3 disappears, the operating coil 6 becomes non-excited, and the pole element 9 is separated from the iron core 8. Accordingly, the locking fitting 13 rotates clockwise, and the fifth It will be in the position shown in the figure. In this state, when the return lever 21F of the display board 21 is pushed upward, the stepped portion 13 of the lock fitting 13
The locking metal fitting 13 rotates counterclockwise by the amount of the protrusion A, but after passing through the protrusion, the locking metal fitting 13 rotates clockwise again, and the step part 13A and the engagement hole 21B of the display board 21 are connected. and returns to the normal state. The operation of the operating lever 25 from the occurrence of a failure until the display board 21 is returned to its original position after recovery from the failure will be explained with reference to FIGS. 7 to 10.

FIG. 7 shows the state of the operating lever 25 during normal operation, and FIG.
The inner peripheral surface of C is engaged with the display plate engaging portion 25A, and at this time the switch 23A is generating a contact signal.

FIG. 9 shows a state in which the display board 21 has completely fallen and the inner peripheral surface of the display board 21C is no longer engaged with the display board engaging portion 25A, and at this time, the contact signal of the switch 23 is not being generated. do not have. When the display board 21 is pushed upward by the display board return lever 21F from the state shown in FIG. 9 after the failure has been recovered, the operating lever 25
The display plate engaging portion 25A engages with the inner peripheral surface of the display portion 21C of the display plate 21, and the operating lever 25 rotates clockwise. This clockwise rotation is opposite to the operation of generating the contact signal of the switch 23. Therefore, during the return operation in which the display board 21 is pushed upward, a contact signal of the switch 23 is not generated. FIG. 10 shows the state immediately before the return operation of the display board 21 is completed, and after that, upon completion of the return operation, the display board 21 enters the normal lying state shown in FIG. In FIG. 11, the dimensions of the display plate engaging portion 25A of the actuating lever 25 are lengthened, so that even if the display plate 21 has completely fallen due to a failure, the display portion 25A is longer.
The inner peripheral surface of C and the display plate engaging portion 25A of the operating lever 25 are in an engaged state, and the contact signal of the switch 23 is transmitted to the display plate 2.
1, a contact signal is generated continuously.

As described above, according to the present invention, it is possible to generate a contact signal for a short time only when a failure occurs, and it is also possible to generate a continuous contact signal by simply changing the actuating lever 25, making the failure indicator inexpensive. There are effects that can be produced.

Although the operating lever 25 always generates a counterclockwise rotational torque due to its own weight, there is no torque for operating the switch 23. In the above explanation, the two states of normality and failure are displayed, but this can be expressed as three states: normality, failure occurrence, and failure continuation.
It can also be used as a status display.

In this case, the mechanism of the operating lever remains the same, and only the structure of the locking fitting and the display plate need to be modified. The duration of the contact signal can be selected between short time and continuous, and the mechanism that generates a short time contact signal only when a failure occurs can be done by selecting only one operating lever, making it possible to create a highly reliable failure indicator. It has the effect of being able to provide it at a low cost.

[Brief explanation of the drawing]

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; When normal, FIG. 3 shows the state when a failure occurs. 4 to 11 show an embodiment according to the present invention,
Figure 4 shows the front of the fault indicator, and Figures 5 and 6 show the
A side view showing the internal mechanism of the fault indicator; Fig. 5 is normal;
FIG. 6 shows the state at the time of failure. 7 to 10 are diagrams showing details of the operation of the operating lever, and FIG. 11 is a fault indicator that generates a continuous contact signal, and shows the internal mechanism on the side when a fault occurs. 1...Case, IA...Display window, IB...
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... Supporting pole element, 10... Supporting pole element shaft, 11... Display board, 11A... Display plate arm, 11B...
・Display plate engagement hole, 11C...Display plate display section, 11D・
...Display board display section, 11E...Display board switch engagement section, 1
1F... Display board switch engaging part, 11G... Display board switch engaging part, 11th... Display board return lever, 12
... Locking metal fitting shaft, 13... Locking metal fitting, 13A... Locking metal fitting stepped part, 13B... Locking metal fitting stepped part, 14... Return spring, 15... Switch fixing piece, 16 ...Switch, 16A...Switch koji, 16B...Switch lever,
16C...Switch roller, 16D...Switch contact drive piece, 16E...Switch contact terminal, 17...Contact lead, 18...Contact terminal, 20...Bobbin, 20
A... Bobbin front, 20B... Bobbin rear, 21.
...Display board, 21A...Display board arm, 21B...Display board engagement hole, 21C...Display board display section, 21D...Display board display section, 21E...Display board operation lever Joint, 2
1F...Display board return lever, 22...Switch fixing piece, 23...Switch, 23A...Switch shaft, 23B
...Switch lever, 23C...Switch roller, 23
D... Switch contact drive piece, 23E... Switch contact terminal, 24... Operating lever shaft, 25... Operating lever,
25A... Actuation lever display plate engaging part, 25B... Actuation lever switch engaging part. Tsutomu, younger brother, 2, leopard, 4, grandson, 3, Tsutomu, 7, 8, leopard? Younger brother/o figure Leopard 5 younger brother'' figure

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 a device that does not fall due to the operation of the armature. It consists of a permissible display board, a return lever that returns the display board to the position before falling, an operating lever that engages with the display board, and a switch that is operated by the operating lever, and the operating lever is partially rotatable. so that one end can touch the display board and the other end can touch the switch, and when the display board is not in the pre-drop or post-drop position, the operating lever is pressed by the display board and rotates, preventing the display board from falling. The failure indicator is characterized in that the display board and the operating lever are engaged so that the switch is driven at the time of the display, and when the display board returns, the display board rotates in the opposite direction from when it was dropped.