JPS5834482Y2 - switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching device in which a power source such as a motor operates after a selection switching mechanism is unlocked.

A power source such as a reversible motor or rotary lenoid,
Various switching mechanisms using limit switches for detecting operation completion in combination are applied to switching circuit switches, circuit breakers, filters, lenses, etc., for example.

In such a case, the object to be switched is directly or indirectly
At the completion point of any switching, it is generally automatically fixed so that it does not float or return due to one reaction force or other acting force.

For this fixing, it is actually used to define the position using a brake that utilizes the force of a spring, a claw that locks into a notch, a pin that fits into a hole, or the like.

Selectively change the polarity of the switch to change the direction of rotation of the motor.
It is necessary to release the locking device before the motor starts rotating.

Usually, the attraction force of an electromagnet is used as a means for releasing the fixing device, and a motor and a power source for the electromagnet are connected in parallel to the changeover switch.

With such a circuit connection, the operating time of the electromagnet and the time required for the inertial force of the mechanism to act and release the fixing device can often be longer than the starting time of the motor depending on the overall configuration. The motor is activated before the locking device is released.

In such a case, a larger current than necessary flows when the motor starts.

There are relatively few problems when the motor has a small output, but it becomes a problem when the motor has a large output or other high-speed switching or high-frequency switching.

If the fixing device is a simple brake, it can be activated even if there is a time delay, but if it uses a claw or a bottle, the force of the motor acts on the fixing device, preventing it from being pulled out. If the required frictional force is greater than the attraction force of the electromagnet,
Since the fixing device also cannot be released, switching becomes impossible and the motor burns out.

Furthermore, if a break or other abnormality occurs in the circuit for releasing the fixing device, the electromagnet, etc., a similar accident will occur.

In order to solve the above-mentioned inconveniences, there are methods in which the power supply time to the motor is delayed and one circuit operation is provided separately, but these are complicated and expensive and can cause malfunctions.

The present invention solves the above-mentioned problems, and uses a simple changeover switch function and a switch circuit that is linked to the mechanism that releases the fixing device to connect the motor power supply circuit.
Alternatively, the present invention provides a device with an extremely stable configuration that automatically enables forward/reverse rotation of the motor, stopping of the motor, shutting off of power, etc.

The present invention will be explained below with reference to the drawings. The figure shows one embodiment of the present invention as a schematic configuration circuit.

The device of this embodiment mainly consists of a rotating switching target mechanism M.
1, an electromagnetic relay that connects and disconnects the motor power supply circuit, 2, an electromagnetic relay that determines the direction of rotation of the motor, and a structure that can be reversely displaced, for example, at switching position A or B of the mechanism M. Solenoid B operates the pin that locks rotation and fixes the position using spring pressure, releases the lock by electromagnetic attraction, and also interlocks the main circuit control switch.
2. Consists of limit switches S7, 88, etc. that detect the switching end of the mechanism M and release the circuit on the operating side.

When the selection changeover switch S□, which is designed to arbitrarily determine the direction of displacement, is switched from contact 1 (A position) to contact 2 (B position) K, the current from the power source P flows through the electromagnetic solenoid B2 and the diode D.
2, limit switch S8 of mechanism M, and switch S1.

Therefore, the suction piece of solenoid B2 is activated and mechanism M+7)
At the same time as the bottle at point A is sucked and the lock is released, the switch S5 linked to the suction piece is activated. To close S6, the current is 0 in the relay and switch S6. It flows through S8.

1 in the relay switches the contacts of the interlocking switch S2 to IK, and the current flows through the switch S2. Motor B1, switch S via S4
3 and the motor starts.

When the mechanism MfJ''--moves from point A to point B and the switching is completed, the operating piece of the □ seat switch S8 falls into the notch of the mechanism M, releasing the contact of the limit switch S6.

The coil of solenoid B2 is de-energized, and the solenoid is activated by the return spring of the suction piece installed inside.

When the pin engaged with the suction piece at point B of the mechanism M is inserted and locked, the interlock switch S5. S6 is in a disconnected state.

In addition, switch S8. Since S6 is released and the current is cut off, the relay returns to 1, and the switch S2 switches to contact 2, cutting off the current to the motor B0 and stopping the motor B1.

Therefore, all current supply to components having all operating functions is cut off, and power consumption becomes zero.

When the device is functioning, the other limit switch S7 is in the closed position at the same time that the mechanism M begins to switch and operate.

However, since switch S1 is in position 2 (position B), none of the entire circuit is affected even if switch S7 is in the closed position.

However, this is necessary because the device has the ability to operate in the opposite direction if switch S1 is switched to contact 1 (position A) during or after the switching operation is completed. be.

Next, a case of switching in the opposite direction to that described above will be described.

When the selection changeover switch S1 is switched from 2 (position B) to 1 (position A), the current from power supply P is transferred to electromagnetic solenoid B.
2, flows through diode D3, switch S7, and switch S1.

Solenoid B2 attracts the locking pin at point B of mechanism M, releases the lock, and activates interlocking switch S5. S
Close 6.

Therefore, the current flows through the relay. Diode D1, switch S5. S7. It flows through the circuit of Sl.

The relay □ operates to switch the switch S2 to the contact IK, allowing the motor B1 to be energized.

2 is activated in the relay by connecting a separate switch S5,
Interlocking switch S5. Switch S4 to contact IK.

Therefore, since motor B1 has a current circuit opposite to that described above, motor B1 rotates in the opposite direction to that described above, and mechanism M
moves from point B to point A, and the switching is completed.

As before, limit switch S7 is installed in the notch of mechanism M.
The actuating piece falls, releasing the limit switch S7 and cutting off the circuit.

Therefore, the solenoid B2 returns to lock the A point of the mechanism M and opens the switch 55t86, and the relays 1tK2 and 1tK2 return to each other, and the switches S2. S3. S4
At the same time, the motor B1 stops.

Note that, as described above, the limit switch S8 closes at the same time as the device starts the reverse rotation function, and becomes ready for selection change of the switch S1.

As described in detail above, according to the present invention, the power source of the drive circuit is connected after the lock of the switching target mechanism is reliably released, so that electrical collision or overload is completely prevented. Not only is it prevented from occurring, but it is also sufficiently safe, as it will not operate if there is an abnormality in the lock release circuit.

Further, in the above embodiments, the switching mechanism is a rotary body, but linear displacement is also possible, and the driving source may also be a motor with fast rotation, or an electromagnetic device capable of linear drive.

In addition to mechanical switches, switches, etc. can be used in various applications such as photoelectric switches, semiconductor application switches, and other proximity switches, and it goes without saying that they are not limited to those described in detail, and other auxiliary functions are also possible. It is preferable to add

For example, there are displays related to switching operations, electromagnetic clutches placed between the motor and mechanism, shock absorbers, reverse-action electromagnetic brakes attached to the motor shaft system, or maintenance and safety circuit devices.

As described above, the present invention can be used in various displacement devices to function extremely safely and reliably, and can be used in various switching devices with excellent effects.

[Brief explanation of drawings]

The figure is a schematic configuration circuit diagram showing an embodiment of the present invention. M... Switching target mechanism, B1... Motor, S□... Switch, B2... Electromagnetic solenoid mechanism, KIK2... Electromagnetic relay. , S
7. B8・・・Sut switch, P・・・・・・
·power supply.

Claims (1)

[Scope of utility model registration request] Interlocked with a displacement direction selection switching circuit, a structure that can be reversely displaced, a drive unit that displaces the structure, a device that fixes the structure in a normal position, and an electromagnetic relay that can release the fixing device. A switching device comprising: a control device that selectively drives the drive section using an opening/closing circuit; and a circuit that can reversibly set the circuit at a displacement end of the structure.