JPH0515703Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a remote control relay that is driven by remote control.

[Background Art] A remote control relay is constructed using a polarized latching relay that switches the main contact connected between a power source and a load by passing an exciting current in different directions through an exciting coil. Each time the remote control switch of the operating circuit is operated, the operating circuit causes current to flow in different directions to the excitation coil to open and close the main contacts, thereby switching the operation of the load remotely. Note that the detailed configuration and operation of the remote control relay will be explained in the embodiment section, so only a brief explanation will be given here.

By the way, with conventional remote control relays like this, it is necessary to check the operation of the load by operating the operating circuit in a normal operating state with power supplied to all circuits. Alternatively, there was a problem in that inspection operations to check the operation of the load during maintenance inspections were time-consuming.

[Purpose of the invention] The present invention has been made in view of the above-mentioned points, and its purpose is to provide a remote control relay that allows easy manual checking of the operation of the load.

[Disclosure of the invention] (Structure) The present invention connects an excitation coil of a polarized latching relay to an AC power source in series with an operation circuit, and applies an excitation current in a different direction to the excitation coil each time a remote control switch of the operation circuit is operated. In a remote control relay that opens and closes the main contact depending on the direction of the current flowing through the excitation coil, a manual lever for manually rotating the armature of the above-mentioned polarized latching relay is attached to the armature, and a manual lever is attached to the armature. The operating surface is exposed from the case housing the relay mechanism such as the excitation coil and main contact, and the operating surface of the manual lever is manually operated, and the armature is forcibly rotated using the manual lever to connect the main contact. This allows you to easily check the operation of the load by opening and closing.

(Embodiment) An embodiment of the present invention is shown in FIGS. 1 to 3.
First, the circuit configuration of the remote control relay will be explained with reference to FIGS. 2 and 3. The remote control relay is composed of a polarized latching relay equipped with a main contact 3 and an auxiliary contact 6 shown in FIG. Connected to AC power supply Vs. To explain in more detail, the operation circuit 2 includes:
Excitation coil 4 of the remote control relay and a diode that determines the direction of current flowing through this excitation coil 4
D ₁ , D ₂ and a current direction determining circuit consisting of an auxiliary contact 6 are connected in series, and the current direction determining circuit is connected to the auxiliary contact 6 which is switched by the excitation coil 4.
Connect diodes to the a and b terminals of the
D ₁ and D ₂ are connected. The main contact 3 of the remote control relay is inserted in series with the load circuit.

FIG. 3 shows an example of the operating circuit 2. This operation circuit 2 includes a remote control switch 7 which is an automatic return type switch and is switched to the terminal a side in the normal state,
When this remote control switch 7 is switched to the terminal b side, one of the three terminal thyristors 8 is turned on and causes an excitation current to flow through the excitation coil 4 of the remote control relay.
a, 8b, a capacitor C that determines which of the three-terminal thyristors 8a and 8b is turned on depending on the charging direction, light-emitting diodes LD ₁ and LD ₂ that display the operating status of the remote control relay, and the three-terminal thyristor 8b.
It consists of a trigger transistor _Q1 .

The operation of this embodiment is as follows. Note that when the excitation current flows through the excitation coil 4 in the direction of the arrow indicated by A in the figure, the main contact 3 closes, and
When the exciting current flows in the direction of arrow B, main contact 3
is opened, and when the main contact 3 is in the open state, the auxiliary contact 6 is switched to the terminal b side as shown in the figure. At this time, since the remote control switch 7 of the operating circuit 2 is switched to the terminal a side, the capacitor C is charged with the negative half-wave current of the AC power supply Vs to the polarity shown in the figure. In this state, a small amount of current flows through the light emitting diode LD ₁ between the base and emitter of the transistor Q ₁ to display the operation status of the remote control relay by the operation circuit 2. However, with this current, the charge in the capacitor C is
It is arranged so that b cannot be triggered. In this state, when the remote control switch 7 is pressed and switched to the terminal b side, a voltage is applied to the transistor _Q1 and the three-terminal thyristor 8b, and the transistor _Q1 is turned on, thereby making the three-terminal thyristor 8b conductive. Therefore, due to the negative half-wave of the AC power supply Vs, a large exciting current flows through the three-terminal thyristor 8b, the remote control switch 7, the auxiliary contact 6, the diode _D2 , and the exciting coil 4 in the direction shown by arrow B in the figure. At the same time as the contact 3 is closed, the auxiliary contact 6 is switched to the terminal a side.

Next, before the remote control switch 7 of the operation circuit 2 is operated, the remote control switch 7 is connected to the terminal a.
By returning to the side, the capacitor C is charged with an electric charge of opposite polarity to the state shown in the figure by the positive half wave of the AC power supply Vs. Note that at this time, the light emitting diode LD ₁ lights up to display the operating state of the main contact 3. When the remote control relay is further operated, the remote control switch 7 is turned on, and the three-terminal thyristor 8a becomes conductive, causing an exciting current to flow in the direction of arrow A in the figure, opening the main contact 3, and opening the main contact 3. When the auxiliary contact 6 is switched to the terminal b side, it operates as described above.

The above is a description of the circuit configuration of this embodiment, and the structure of the remote control relay will be described below. FIG. 1 is a diagram showing a remote control relay,
The remote control relay of this embodiment is a balanced amateur type used for large current of 20A. This remote control relay consists of a remote control relay body 10 and a terminal block 9 on which this remote control relay body 10 is placed. Remote control relay body 1
0 has a substantially H-shaped armature 13 in which a substantially U-shaped iron core 11 opening upward is arranged on a body 12, and both side pieces of this iron core 11 are interposed between suction surfaces formed at both ends. is rotatably mounted around a shaft 14. An excitation coil 4 is wound around the center piece of the iron core 11, and two permanent magnets (not shown) are housed inside the armature 13.
A main contact 3 and an auxiliary contact 6 are formed on the side surface of the armature 13. Main contact 3 is connected to body 1
Terminals 15a and 15b are buried in the body 12 with their upper ends exposed and their lower ends protruded from the lower surface of the body 12.
and a contact spring 16 having one end fixed to the terminal 15a and the other free end having a contact 18 that contacts a contact 17 formed on the terminal 15b,
An L-shaped card portion 19 protruding from the side surface of the armature 13 drives a contact spring 16 to open and close the contacts 17 and 18. The auxiliary contact 6 is composed of a terminal (not shown) embedded in the body 12 and contact springs 20a, 20b arranged on the left and right sides of the armature 13, and a diode D is connected to one end of the contact spring 20a, 20b. ₁ and D ₂ are connected, and the other ends of each of the diodes D ₁ and D ₂ are connected to the excitation coil 4. A common terminal of this auxiliary contact 6 is connected to a connecting terminal 22 of a terminal block 9 to which the operating circuit 2 is connected. This auxiliary contact 6 has a protruding card portion 2 that is protruded from the side surface of the armature 13 corresponding to the contact springs 20a and 20b.
1, and the contacts are switched by reverse operation.
A cover 23 is attached to the body 12 on which the relay mechanism section consisting of the above-mentioned iron core 11, armature 13, main contact 3, and auxiliary contact 6 is covered. The cover 23 is attached by fitting a groove 25 formed at the lower end of the cover 23 into a protrusion 24 formed on the side surface of the body 12.

In this remote control relay, when the remote control switch 7 of the operation circuit 2 is pressed, an exciting current flows through the exciting coil 4 in a direction determined by the switching state of the auxiliary contact 6, and the armature 13 rotates around the shaft 14. , the main contact 3 is opened and closed, and the auxiliary contact 6 is also switched at the same time. Next, when the remote control switch 7 of the operating circuit 2 is pressed, the auxiliary contact is switched in the opposite direction, so a current flows in the opposite direction to the excitation coil 4, and the armature 13 moves in the opposite direction to that in the above case. This causes the main contact 3 and the auxiliary contact 6 to switch to the opposite state to the above-mentioned switching.
Note that the rotational state of the armature 13 is maintained by the attractive force of a permanent magnet.

Although the above configuration is similar to that of a conventional remote control relay, the characteristic configuration of this embodiment will be described below. In this example, amateur 13
The manual lever 26 is provided with a manual lever 26 for manually switching, and the operating surface 26a of the manual lever 36 is exposed from the case 23 and attached to the armature 13. The manual lever 26 has a U-shaped cross section, and has a cylindrical protrusion 26b protruding from its upper surface.A screwdriver or the like is inserted into the upper surface of the protrusion 26b, which is the operation surface, to rotate the manual lever 26. A groove 28 is formed. This manual lever 26 is fitted onto the armature 13 from above, and for this reason, two protrusions 27 are formed in the vertical direction on the inner surfaces of both side pieces. A recess 29 is formed on the side surface of the armature 13 for attaching the armature at a predetermined position on the armature 13.
The protrusion 2 of the manual lever 26 is attached to the cover 23.
An insertion hole 30 is formed through which the lever 6b is inserted, and the operation surface 26a of the manual lever 26 is exposed so that it can be operated with the cover 23 attached. A fitting groove 28 is provided at the periphery of the insertion hole 30 of the cover 23 so that when the manual lever 26 is operated to manually drive the remote control relay, the open/closed state of the main contact 3 can be determined. An inscription 31 indicating the on/off state of the main contact 3 is engraved in the facing direction. According to this embodiment, when installing the remote control relay or performing maintenance and inspection, it is not possible to forcibly rotate the armature 13 using the manual lever 26 to open or close the main contact 3. Therefore, it does not take much effort to check the load operation, unlike the conventional case where the operation of the load is checked using the operation circuit 2 while the power is turned on in the same way as in normal use. Therefore, it is possible to easily check the operation of the load. Moreover, amateur 13
Since it is forcibly rotated, if the remote control relay malfunctions, it can be determined whether there is an abnormality in the main contact.

[Effect of the invention] As described above, the present invention connects the excitation coil of the polarized latching relay to the AC power supply in series with the operation circuit, and excite the excitation coil in a different direction each time the remote control switch of the operation circuit is operated. It is a remote control relay that opens and closes the main contacts depending on the direction of the current flowing through the excitation coil.The excitation coil is wound around the center piece of a roughly U-shaped core that opens upward. A roughly H-shaped armature is rotatably mounted on an iron core with both side pieces interposed between suction surfaces formed at both ends, and main and auxiliary contacts are opened and closed according to the rotation of the armature. and are arranged on both sides of the armature, respectively, in which a manual lever having a substantially U-shaped cross section for manually rotating the armature of the polarized latching relay is fitted onto the shaft attachment part of the armature from above, Since the operating surface of the manual lever is exposed from the top of the case that houses the relay mechanism consisting of each of the above components, the armature can be forcibly rotated using the manual lever to open and close the main contacts. Confirming the operation of the load does not require much time and effort, unlike the conventional method of checking the operation of the load using the operating circuit with the power turned on as in normal use. Alternatively, when performing maintenance and inspection, the main contact can be forcibly switched to easily check the operation of the load. In addition, since the manual lever, which has a substantially U-shaped cross section and is used to manually rotate the armature of the polarized latching relay, is fitted from above to the shaft attachment part of the armature, there is no need to attach a manual lever.
By simply replacing the cover, you can easily manufacture two types: one that allows manual operation and one that cannot.
Furthermore, since the operating surface of the manual lever is exposed from the top surface of the case that houses the relay mechanism, the operating surface of the manual lever is positioned in a direction that is easily seen by the operator in the normal installation state, making it easier to operate. Furthermore, since the manual lever can be attached to the shaft attachment part of the armature arm in accordance with the original direction of rotation of the armature arm, the structure can be simplified.
This has the effect of reducing operating force.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure is a circuit diagram of the same as the above, and FIG. 3 is a circuit diagram showing the operating circuit of the same. 2 is an operating circuit, 3 is a main contact, 4 is an exciting coil,
6 is an auxiliary contact, 11 is an iron core, 12 is a body, 13
23 is a cover, 26 is a manual lever, 26a is an operation surface, and Vs is an AC power source.

Claims (1)

[Scope of utility model registration request] An operating circuit is connected in series with the excitation coil of the polarized latching relay to an AC power source, and each time the remote control switch of the operating circuit is operated, an excitation current in a different direction is passed through the excitation coil to change the direction of the current flowing through the excitation coil. Therefore, it is a remote control relay that opens and closes the main contact, and an excitation coil is wound around the center piece of a substantially U-shaped iron core that opens upward, and both sides of the iron core are connected between suction surfaces formed at both ends. Approximately H in the form of intervening
A letter-shaped armature is rotatably attached to the iron core,
In a remote control relay in which a main contact and an auxiliary contact, which open and close according to the rotation of the armature, are arranged on both sides of the armature, the armature of the polarized latching relay is manually rotated. A remote control relay characterized in that a lever is fitted into a shaft mounting part of an armature from above, and the operating surface of the manual lever is exposed from the top surface of a case housing a relay mechanism having each of the above configurations.