JPS6240339Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a falling fault display device, which displays a fault by releasing the display body and dropping it in response to a fault signal. The present invention also relates to a structure capable of generating an electrical fault signal.

(Prior art) Conventionally, this kind of falling-type failure display device uses a failure signal to excite an electromagnetic coil, and the excitation operation of the electromagnetic coil attracts a fall-prevention piece formed of a magnetic plate. The display body, which was previously restricted to fall, is lowered to display a malfunction, and the switch that was in the OFF state at the position where the display body was prevented from falling is turned on when the display body falls, and the display is displayed at the position where the display body has fallen. A structure has been proposed in which a switch that is on is turned off when the body is prevented from falling.

(Problems to be solved by the invention) In the structure of the conventional fault display device described above, when the switch SW is closed by a fault signal as shown in Fig. 1, the excitation coil Mg is excited;
The display body is lowered by the excitation operation of Mg, and when this display body starts the lowering operation, the switch is activated.
SW ₁ is turned on, its contacts are closed, and then switch SW ₂ is turned off when the display body is in the lowered position.
the second by opening its contacts.
As shown in the figure, when a fault is detected, a pulse signal is generated at regular intervals due to the time difference between the ON operation of switch SW ₁ and the OFF operation of switch SW ₂ , and this pulse signal is used to drive the alarm circuit. An alarm can be issued each time a fault occurs, and even if multiple fault indicators are installed in parallel, the alarm can be activated each time each fault indicator operates, and the fault status can be grasped. In this structure, the display body releases the locking of the fall prevention piece by excitation of the electromagnetic coil, and then starts falling, and this fall operation of the display body turns on the switch SW ₁ , which may cause a failure. It takes time for the switch SW ₁ to turn on after the signal is generated, and on the other hand, the contact spring pressure of the switch SW ₁ is biased in the downward direction when the falling operation starts.
When descending, the display is assisted by the contact spring pressure of switch SW ₁ , shortening the falling time, and when switch SW ₁ is turned on, the display is turned off by lowering the display, and when switch SW ₂ is turned off. However, the output time of the alarm signal is short, and there is a problem that an accurate alarm cannot be obtained.

The present invention was devised in view of the above-mentioned problems.The actuating piece, which is excited by a fault signal, turns on the switch for generating a rising pulse, and at the same time, the actuating piece lowers the display. ,
By lowering this display, a fault is indicated and the switch for generating a falling pulse is turned off.The operation of both switches provides an alarm output with a long pulse width to confirm the fault. The present invention provides a failure display device that can reliably perform the following.

[Structure of the idea]

(Means for Solving the Problems) The drop-type failure display device of the present invention includes a container body 1, and a display body 17 rotatably supported by the container body 1 and rotated downward by its own weight. and an electromagnetic coil 3 attached to the vessel body 1 that attracts and retreats the plunger 5 through an excitation operation, and is moved forward and backward by the plunger 5, and as the plunger 5 advances, the display body 17 advances to the locking position. and an actuating piece 7 that is retracted to a position where the display body is released from the lock when the plunger 5 retreats and the display body 17 can be rotated downward by its own weight; a switch 13 for generating a rising pulse which is operated by an actuating piece portion 10 formed on the actuating piece 7 so as to be positioned and attached to the device frame 1 and facing the retracted position of the actuating piece 7; and the display body This display body 1 is attached to the vessel body 1 facing the lowered position of 17.
7, a falling pulse generation switch 26 is actuated by an actuating piece 23 formed on the display body 17, and the rising pulse generation switch and the falling pulse generation switch 26 are provided. This is characterized in that an alarm output is generated by a pulse obtained by the operation of the alarm.

(Function) In the drop-type failure indicator of the present invention, the display body 17 is engaged with the actuating piece 7 during normal times, and the display body 17 is located above. In this state, for example, when a fault signal voltage is applied to the electromagnetic coil 3, the plunger 5 is attracted by the excitation operation of the electromagnetic coil 3, and as the plunger 5 retreats, the actuating piece 7 is retreated. At this retracted position of the actuating piece 7, the actuating piece 10 of the actuating piece 7
operates the rising pulse generation switch 13, and this rising pulse generation switch 13 is turned on. Moreover, the engagement between the actuating piece 7 and the display body 17 is disengaged by the backward movement of the actuating piece 7, and the display body 17 is rotated downward by its own weight to be located at the display position. This display body 1
At the lowered position 7, the operating piece 23 operates the falling pulse generation switch 26, and the falling pulse generation switch 26 is turned off.

Then, when an accident occurs, the actuating piece 7 turns on and closes the switch 13 for generating rising pulses due to the excitation operation of the electromagnetic coil 3. 3
The excitation operation is performed with almost no time difference from the excitation operation.

In addition, when the display body 17 is in the lowered position, the display body 17
As a result, the falling pulse generation switch 26 is turned off, and the display body 17 is not assisted by the contact pressure of the rising pulse generation switch 13 operated by the operating piece 7 during the descent, so the descending speed increases. It is obtained by the ON operation of the rising pulse generation switch 13 operated by the operating piece 7 and the OFF operation of the falling pulse generation switch 26 operated by the display 17. The pulse width becomes long, and by activating the alarm with the output obtained by this pulse, a stable and reliable alarm is generated.

(Embodiment) Next, the structure of an embodiment of the present invention will be explained with reference to drawings 5, 6, 11, and 12.

Reference numeral 1 denotes a container body formed of a metal plate in the shape of a box with an open bottom surface, and a mounting frame 4 for an electromagnetic coil 3 is fixed to a top plate portion 2 of the container body 1. The mounting frame 4 is formed of a metal plate into a substantially U-shape, and the electromagnetic coil 3 attached to the mounting frame 4 is provided with a plunger 5 that moves forward and backward. The plunger 5 is attracted by the excitation operation of the electromagnetic coil 3, and is retracted against a coil-shaped spring 6 interposed in the plunger 5.

Further, a connecting piece 8 of an actuating piece 7 is fixed to the tip of the plunger 5. The actuating piece 7 includes a sliding piece 9 that is bent horizontally from the lower end of the connecting piece 8 and slides on the top plate 2, and a sliding piece 9 that extends downward from the front end of the sliding piece 9. The operating piece 10 is vertically bent and protrudes into the container body 1 from an opening 11 formed at the front end of the upper plate 2. Further, a regulating piece 12 is formed on one side edge of the actuating piece 7 and is bent vertically upward. has been done.

Further, first and third switches 13 and 14 are installed in parallel on the left and right on the inside front side of the container body 1, facing the retracted position of the actuating piece portion 10 of the actuating piece 7,
This first switch 13 becomes a switch for generating a rising pulse. The actuators 15 and 16 of the first and third switches 13 and 14 are pushed by the actuating piece portion 10 when the actuating piece 7 retreats,
When the actuating piece 7 is in the retracted position, the first and third switches 1
3 and 14 are turned on.

Further, 17 is a first display body, and this first display body 17 has arm parts 19 and 20 bent at right angles from both sides of the front display part 18 toward the rear side. The rear end thereof is rotatably supported by a shaft 22 on the side plate portion 21 of the vessel body 1. Further, an actuation piece 23 is formed at the lower edge of the arm part 19 on one side of the first display body 17 and is bent horizontally. It protrudes inward from.

Then, a fourth and a second switch 2 are placed in the container body 1 facing the lowering of the first display body 17.
5 and 26 are installed in parallel on the left and right, and this second switch 26 serves as a falling pulse generation switch.
When the first display body 17 is rotated downward, the actuating piece 23 pushes the upper surfaces of the actuators 25a and 26a of the fourth and second switches 25 and 26, and the first display body 17 is lowered. At this position, the fourth switch 25 is turned on and the second switch 26 is turned off at the operating piece 23.

Further, on the upper edge of the other arm portion 20 of the first display body 17, a locking piece portion 27 is horizontally bent and engaged with the regulating piece portion 12 when the actuating piece 7 advances. There is.

Next, 28 is a second display body, and the front display part 29
It has arm parts 30, 31 bent at right angles from both sides toward the rear side, and the rear ends of these arm parts 30, 31 are rotatable about the shaft 22 on the side plate part 21 of the vessel body 1. It is pivoted on. Further, the lower edge of one arm portion 30 of this second display body 28 is provided with the first
A recess 32 is cut out to avoid collision with the operating piece 23 of the display body 17. Furthermore, this second
On the upper edge of the other arm portion 31 of the display body 28, there is a locking piece portion 33 that is engaged with the regulating piece portion 12 of the actuating piece 7 when the plunger 5 retreats. It is located rearward of the locking piece 27 and is bent horizontally.

Next, reference numeral 34 denotes a return operating body, which is provided so as to be slidable in the front and back direction along the inner surface of the side plate portion 21 of the container body 1. A guide elongated hole 37 is formed in the front-rear direction, through which guide shafts 36, 36 provided in the projecting plate portion 35 extending downward are inserted. The return operation body 34 is urged forward by a spring 38 stretched between the return operation body 34 and the one guide shaft 36. The return operation body 34 also includes an actuator 26a of the fourth switch 26 when retracting.
An operating piece portion 39 is formed that engages with the upper surface of the fourth switch 26 to maintain the off state of the fourth switch 26. Further, at the rear end of the return operation body 34, a return operation piece portion 41 is engaged with an engagement portion 40 formed with a notch located above the shaft 22 on the rear upper edge of the second display body 28. is formed.

Note that a cover piece 42 that covers the plunger 5 is attached to the mounting frame 4.

Reference numeral 43 denotes a cover provided at the opening of the case 44 to which the container body 1 is attached, and this cover 43 includes the display portions 1 of the first and second display bodies 17 and 28.
8 and 29 are formed with a display window 46 which is exposed when the display bodies 17 and 28 are lowered.

Further, this cover 43 is provided with a push button 48 for pressing the front pressed portion 47 of the return operation body 34.

Next, the operation of this embodiment will be explained.

Under normal conditions, the locking piece 27 of the first display body 17 is engaged with the regulating piece 12 of the actuating piece 7, as shown in FIGS. 5, 6, 11, and 12. The display part 18 of the first display body 17 is located above, and the second display body 28 is in a state of being lowered.
The display portion 29 of the second display body 28 faces the display position of the display window 46 of the cover 43. When, for example, an accident signal is applied to the electromagnetic coil 3 in this state, the plunger 5 is attracted by the excitation operation of the electromagnetic coil 3, and the actuating piece 7 is moved backward by the plunger 5. When the actuating piece 7 retreats, the actuating piece 1 of the actuating piece 7
0 pushes the actuators 15, 16 of the first and third switches 13, 14, and the first and third switches 13, 14 are turned on. Also, actuating piece 7
The regulating piece 12 moves toward the first display body 1 when the
7, the first display body 17 is rotated downward around the shaft 22, and the display part 18 of the first display body 17 is removed from the display part 27 of the second display body 28.
9, and as shown in FIGS. 7, 8, 13, and 14, the display part 29 of the second display body 28 is shielded, and the display part 1 of the first display body 17 is
8 is located at the display position of the display window 46. Also the first
When the indicator 17 is lowered, the actuating piece 23 activates the actuator 25 of the fourth and second switches 25 and 26.
a, 26a, the fourth switch 25 is turned on, and the second switch 26 is turned off.

If the return operating body 34 is pushed in this state, the ninth
As shown in FIGS. 10, 15, and 16, the actuating piece 39 is retracted and
9 is the actuator 26a of the second switch 26 that was pressed by the actuating piece portion 23 of the first display body 17
The second switch 26 is held in the off state by contacting the top surface of the second switch 26 . Further, when the return operation body 34 is retreated, the return operation piece portion 41 is moved to the engagement portion 4 of the second display body 28.
0, and this return operating piece portion 41 engages the engaging portion 40.
When engaged with the rear edge 40a, the second display body 28 rotates upward about the shaft 22, and the other arm portion 31 of the second display body 28 engages with the first display body 1.
Push up the locking piece 27 of 7.

By the upward rotation of the first display body 17, the fourth and second switches 25,
26, the actuator 26a of the second switch 26 is released from the pressure on the actuators 25a, 26a of the second switch 26. At this time, as shown in FIGS. 3
9, and the second switch 26 is held in the off state, but the actuator 25a of the fourth switch 25 is pressed against the first display 1.
7 is released from the pressure by the actuating piece 23 and returns to its original state.
The fourth switch 25 is returned to the off state.

At this time, when the electromagnetic coil 3 is returned to the non-excited state, the plunger 5 is also returned forward by the spring 6, and therefore the actuating piece 7 is also returned forward. With this return of the actuating piece 7 to the front, the actuating piece part 10 is connected to the first and third switches 13 and 1.
The pressure on actuators 15 and 16 of No. 4 has been released, and the first and third switches 13 and 14 have returned to the OFF state.

Further, when the actuating piece 7 returns to the front due to the de-excitation of the electromagnetic coil 3, the regulating piece 12 moves toward the second display body 2.
8, and only the locking piece 27 of the first display body 17 presses the regulating piece 12 inwardly against the elasticity of the first display body 17.
The display body 17 rotates upward. This first
When the locking piece 27 of the display body 17 is located above the upper edge of the regulating piece 12, the regulating piece 12 returns to the outside and tilts due to its elasticity. When the pressure on the return actuator 34 is released, the return actuator 34 returns forward by the spring 38.
The return actuating piece 41 releases the rearward pressure on the engaging portion 40 of the second display body 28 , and the second display body 28
is rotated downward around the shaft 22 by its own weight, the locking piece 27 of the first display body 17 is released, and the first display body 17 is also rotated downward around the shaft 22 by its own weight. At this time, the electromagnetic coil 3 has returned to the non-excited state, so the locking piece 27 of the first display body 17 is rotated toward the operating piece 7.
is engaged with the upper edge of the regulating piece 12, the first display body 17 is prevented from rotating downward, and the second display body 2
8 is rotated downward, and the display section 29 of the second display body 28 is brought to the display position.

Further, when the aforementioned pressure on the return operation body 34 is released, the return operation body 34 is returned forward by the spring 38, and the operation piece portion 39 is moved toward the second switch 2.
Release the hold of the OFF operation of the actuator 28 of No. 6,
The second switch 26 has been returned to ON operation.

Further, when the first display body 17 is in the lowered state,
When the return operating body 34 is pushed while the electromagnetic coil 3 continues to be in an excited state, the regulating piece 12 of the actuating piece 7 is positioned at the engagement position with the locking piece 33 of the second display body 28. Therefore, the locking piece 33 of the second display body 28 moves upward while resisting the elasticity of the regulating piece 12, and the locking piece 33 of the second display body 28 moves upward while resisting the elasticity.
3 is engaged with the upper edge of the regulation piece part 12, the locking piece part 27 of the first display body 17 is engaged with the arm 31 of the second display body 28, and the first and second display bodies 1
7 and 28 are restricted from rotating downward, and the front plate portion 49 of the container body 1 faces the display position.

If the excitation coil 3 becomes de-energized in this state,
The plunger 5 is moved forward by the spring 6, the actuating piece 7 is also moved forward, and the regulating piece 1 thereof is moved forward.
2 comes off from the locking piece 33 of the second display body 28,
The second display body 28 is rotated downward, so that the display section 29 of the second display body 28 faces the display position.
At this time, the locking piece portion 27 of the first display body 17 is engaged with the regulating piece portion 12, so it is not lowered, and the display portion 29 of the second display body 28 performs the display.

Next, an example of use using this drop-type fault display device will be explained with reference to FIGS. 3 and 4. Normally, the switch 50 is open and the electromagnetic coil 3 is kept in a non-excited state. At this time, the first display body 17 is held upward, and the display section 29 of the second display body 28 is positioned in the display window 46 to display the normal state.

An accident occurs in this state, and upon detection of the accident, the switch 50 is turned on and the electromagnetic coil 3 is energized.
Based on the excitation operation of the electromagnetic coil 3, the first and third switches 13 and 14 are turned on and closed. This is performed with almost no time difference from the excitation operation.

Also, at the lowered position of the first display body 17, the fourth
The fourth switch 25 is turned on, and when the fourth switch 25 is turned on, an output indicating that the failure recovery operation has not been completed is obtained. Furthermore, the second
The switch 26 is turned off. The first switch 13 is directly turned on by the excitation of the electromagnetic coil 3, regardless of the downward movement of the first indicator 17, and when the first indicator 17 is lowered, the first and third switches are turned on. 13 and 14, the descending speed is not increased, and is achieved by the ON operation of the first switch 13 and the OFF operation of the second switch 26. The pulse width is longer than the pulse width obtained by the switch that turns on when the display moves down and the switch that turns off when the display moves down, and the output obtained by this pulse activates the alarm. By activating the alarm, a stable and reliable alarm output is generated.

Further, by pressing the return operation body 34, the first display body 17 is returned upward, and the fourth switch 25
is turned off, and the return operation incomplete display output disappears, confirming that the return operation has been performed. In addition, the pressing operation of the return operation body 34 is performed by the excitation coil 3
During the ON operation of the first switch 13, which continues to be energized, the first display body 17, which is rotated upward from the second display body 28, is returned to its original state before it is engaged and held upward. Even when the pressure on the operating body 34 is released, the second switch 26 continues to be turned off by the actuation piece 39, and the first switch 13 is turned on and the second switch 26 is turned off. It is possible to prevent malfunctions that would cause an alarm output due to the operation.

[Effect of idea]

According to the present invention, the switch for generating rising pulses is directly operated by the actuating piece operated by the excitation operation of the electromagnetic coil, which is compared to a structure in which the switch is operated through the downward movement of the display body. When the display body is lowered, the contact spring pressure of the rise pulse generation switch is not applied, and the speed is not increased when the display body is lowered. Since the switch for generating a falling pulse is turned on at the time of descent, the pulse output obtained by both switches can be made longer, and a stable alarm signal, for example, can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of the conventional display device, Fig. 2 is an operation timing diagram of the same as above, Fig. 3 is a circuit diagram of the display device of the present invention, Fig. 4 is a timing diagram of the same as above, and Fig. 5 is an example of the above invention. A right side view of the display device showing the embodiment, FIG. 6 is a partially cutaway left side view of the same as above, FIG. The figure is a partially cutaway front view of the same as above, No. 9
The figure is a right side view showing the state at the time of return operation, Fig. 10 is a left side view with a part of the same as above cut away, and Fig. 11 shows the relationship between the actuating piece and the switch in the state shown in Fig. 5. 12 is a vertical sectional front view showing the relationship between the display body and the switch; FIG. 13 is a vertical sectional front view showing the relationship between the actuating piece and the switch in the state shown in FIG. 7; FIG. The figure is a vertical sectional front view showing the relationship between the display body and the switch, FIG. 15 is a vertical sectional front view showing the relationship between the actuating piece and the switch in the state shown in FIG. 9, and FIG.
The figure is a longitudinal sectional front view showing the relationship between the display body and the switch. DESCRIPTION OF SYMBOLS 1... Container body, 3... Electromagnetic coil, 5... Plunger, 7... Actuation piece, 10... Actuation piece part, 13...
...First switch serving as a switch for generating a rising pulse, 17... Display body, 23... Actuation piece part, 26...
...A second switch that serves as a switch for generating falling pulses.

Claims (1)

[Scope of utility model registration request] a display body rotatably supported by the body and rotated downward by its own weight; an electromagnetic coil attached to the body and attracting and retracting the plunger by an excitation operation; The plunger moves forward and backward, and when the plunger advances, the display body is advanced to the locking position, and when the plunger retreats, it is disengaged from the display body, and the display body is rotated downward by its own weight. an actuating piece that is retracted to a position where it can move, and an actuating piece part that is attached to the container frame facing the retracted position of the actuating piece and formed on the actuating piece at the retracted position of the actuating piece. a switch for generating a rising pulse, which is attached to the device body facing the lowered position of the display body, and operated by an actuating piece formed on the display body when the display body is in the lowered position. A falling type fault display device, comprising a pulse generation switch, and generating an alarm output with a pulse obtained by operating the rising pulse generation switch and the falling pulse generation switch. .