JPS5947154B2 - Manual/automatic switching operation circuit using hydraulic power source - Google Patents

Description

[Detailed Description of the Invention] The present invention is designed to start an electric motor for a hydraulic pump by simply pressing the "manual" or "automatic" operating switch, and to smoothly switch between the "manual" and "automatic" operating circuits using the hydraulic power source. This invention relates to a switching operation circuit.

The "manual" and "automatic" operation circuits referred to here are electrical circuits that use a hydraulic power source from a pump electric motor to excite multiple solenoid valve solenoids with a single-action operation switch to move the actuator and cause the machine to operate in a single-action manner. is called a "manual" operating circuit, and an electrical circuit that causes the plurality of electromagnetic valve solenoids to operate the machine continuously according to a predetermined order is called an "automatic" operating circuit.

Conventionally, a hydraulic pump is driven by an electric motor, a hydraulic system is used, and the operation switch is used to switch between "manual" and "automatic" operation. However, overload caused by starting the motor under load In order to prevent unexpected malfunctions caused by turning the pump when you forget to turn it off, set it to neither ``manual'' nor ``automatic'' and turn on the pump start switch first, so that the pump starts rotating. This was complicated as it required double operations to set the operation switch to ``manual'' or ``automatic.''

Also, even if you turn on the pump start switch, it will not change to "manual" or "automatic".
Some pumps are designed to ensure safety by preventing the pump motor from rotating when the switch is turned on.
It took some time to understand this kind of ink lock and get used to its operation.

In view of these points, the present invention eliminates the complicated double operation of turning on the pump start switch and then turning on the operation switch to "manual" or "automatic", and also improves the safety of the ink pump. By avoiding the disadvantage that it takes time to understand and get used to the operation that the pump cannot be started if the operation switch is set to ``manual'' or ``auto'', safe and one-touch hydraulic pressure control is possible. Source:
This is used to switch between manual and automatic operation.

In addition, in the present invention, at least as for switching between "manual" and "automatic", "automatic" includes cases where there is a classification of "fully automatic" and "semi-automatic", and in the following embodiments, it is clear that "manual" and "semi-automatic" are included.
A case will be explained in which the three-operation switching between "semi-automatic" and "fully automatic" is performed smoothly.

Embodiments of the present invention using switches such as pushbutton switches, relays, and timers will be described with reference to the drawings.

In the figure, symbols R, S, and T are three-phase power supply connection lines, which are connected to the pump motor 1, and between them, a no-use breaker 2 is inserted in series with a contact 3a to protect them. The contact 3a is a normally open contact of the coil 3 of the electromagnetic switch, and the pump motor 1 rotates when the breaker 2 and the contact 3a are closed.

Furthermore, by connecting the thermal contact 5 of the electromagnetic switch in series with the coil 3, the pump motor 1 is thermally protected from overload.

6°7 is a no-use breaker for protecting the control circuit and is included in the connecting wires R and S.

4a and 4b are the normally open contacts of the pushbutton switch (hereinafter referred to as the "manual" operation pushbutton switch) for energizing the "manual" operation circuit, 4c is the normally closed contact, and 8 is the "manual" operation The circuit holding relay coil 9a is connected to the manual operation circuit, and is used to start or stop any one of the multiple single-acting operations when the single-acting operation that is not automatically reset is "ON" or "OFF" or when the selector switch is "OFF". The conductive contact 10a is used for manual operation that starts and stops other single-acting operations without automatic return.
This is a contact that conducts when the "off" push button switch is "off", and if the single action operation switches 9a and 10a are not in the "off" state, press the "1 manual" operation push button switch and contact 4b
Even if the ``manual'' operation circuit is closed, the holding relay coil 8 for the ``manual'' operation circuit is not energized, and the normally open contact 8b (described later) remains open and the ``manual'' operation circuit is not activated.
The operating circuit is not energized.

In addition, if you want to rotate only the pump motor, press the leg button switch that also serves as pause and pump start, and the normally closed contact 2
1b is cut, and then the normally open contact 21a is turned on, and the coil 3 and the rotation holding relay coil 11 of the pump motor are energized.
Only the pump electric motor 1 begins to rotate.

Also, if you press the leg button switch that also serves as pause and pump start while operating in "manual,""semi-automatic," or "fully automatic," the self-holding circuit for "manual,""semi-automatic," and "fully automatic" will be reset. The system enters a rest state in which only the electric motor 1 rotates.

8c is a manual indicator light indicating that the relay coil 8 for holding the "manual" operating circuit is energized, 8a and 8b are the normally open contacts and points of the relay coil 8 for holding the "manual" operating circuit, and 9 is the "manual" It is an operating circuit and is operated "manually": When the leg button switch is pressed, its contact 4a closes, and the coil 3 of the electromagnetic switch is closed.
is energized, the contact 3a is closed, the pump motor 1 rotates, and the relay coil 11 for maintaining rotation of the pump motor 1 is energized, and the normally open contact 11a is closed to operate the "manual" mode.
For operation: Even if the push button switch is released and the contact 4a is opened, the pump motor 1 continues to rotate due to self-holding.

3b is a normally open contact of the electromagnetic switch coil 3, and when the contact 3b is closed, it becomes possible to energize the holding circuit after selection and selection of the "manual", "semi-automatic", and "fully automatic" operating circuits.

If you are pressing the pushbutton switch for "manual" operation now, its normally closed contact 4c opens and de-energizes the "semi-automatic" relay coil 12 and the "fully automatic" relay coil 13, and then Normally open contact 4b closes, “manual” operation □
When the normally closed contacts 9a and 10a of the "on" and "off" switches are closed, the holding relay coil 8 for the "manual" operation circuit is energized, and its normally open contacts 8a and 8b are closed.

On the other hand, a timer is set to wait until the pump electric motor 1 is in a normal rotation state, and the "manual" operation circuit 9 becomes energized only when the timer coil 14 expires and closes the contact 14a.

15a is a normally closed contact of a pump stop pushbutton switch. When the stop pushbutton switch is pressed, each relay, timer, and electromagnetic switch coil are de-energized, the pump motor is stopped, and the "manual" and "manual" switches are turned off. The relays for maintaining semi-automatic and fully automatic operation are reset.

16a and 16b are contact points of an automatic return type push button switch for checking the rotational direction of the pump motor 1, and 16a is the contact point of the wire ring 3.
16b is a normally closed contact included in a circuit parallel to the contact 4a, and 16b is a normally open contact parallel to the contact 4a.

This push button switch of the pump motor 1 is located near the pump motor 1 and is not normally used.

When this pushbutton switch is pressed, the contact 16a first opens, and when it is further pushed, the contact 16b closes, and the same applies to other "manual", "semi-automatic", and "fully automatic" operation pushbutton switches.

Also, when the push button switch for confirming the rotation direction is pressed, the contact 16a opens and the relay coil 1 for maintaining rotation is connected in series with the contact 16a.
1 and the timer coil 14 parallel to the coil 11 are not energized, so the contact 3a closes only while the rotation direction confirmation switch is pressed, and the pump electric motor 1 rotates and opens when released. The electric motor 1 is never held in rotation.

17a and 17b are normally open contacts 17c and 17d of push button switches for "semi-automatic" operation, and 17e is a normally closed contact.
is an indicator light indicating that the "semi-automatic" operation holding relay is in the energized state.

Further, the normally open contact 18 of the relay coil 12 for holding "semi-automatic" operation 12a and 12b is a "semi-automatic" operating circuit.

19a. 19b is a normally open contact of a push button switch for "fully automatic" operation, and 19c and 19d are normally closed contacts.

Further, 13c is an indicator light that lights up to indicate when the relay coil 13 for holding "fully automatic" operation is in an excited state.
a and 13b are normally open contacts of the relay coil 13 for holding the "fully automatic"operation; 20 is a leg button switch for the "fully automatic" operation circuit 21 which is used for stopping and starting the pump; and 21a and 21b are full contacts.

The above description is about manual operation, but the same applies to "semi-automatic" and "fully automatic" operations. In the case of "semi-automatic" operation, when the push button switch for semi-automatic operation is pressed, the contact 17a closes.
In the case of "fully automatic" operation, when the push button switch for fully automatic operation is pressed, contact 19a closes, and in either case, coil 3 and timer coil 14 are energized, contacts 3a and 14a are closed, and pump motor 1 is rotated. At the same time, it becomes possible to energize the "semi-automatic" or "fully automatic" operating circuit.

On the other hand, in the operation circuit selection and self-holding circuit, contact 17c
Alternatively, the "semi-automatic" operating circuit 18 or "fully automatic" operation circuit 18 or "fully automatic" can be activated according to the opening of 19c, the excitation of the coil 12 or 13 with the closing of the contact 17b or 19b, and the closing of the contact 12b or 13b with these excitations. '' operation circuit 20 is activated, allowing for ``semi-automatic'' operation or ``fully automatic'' operation.

Further, although the illustrated embodiment is a circuit mainly consisting of relays and switches, they may be replaced with electronic circuits as appropriate.

As described above, in the present invention, the electric motor for the pump can be started simply by pressing the "manual" or "automatic" push button switch, and the hydraulic pump can smoothly switch between "manual" and "automatic" operation. When you press the pump stop pushbutton switch to stop the pump without having to perform the double operation of pressing the start pushbutton switch to rotate the pump motor and then switching the operation switch to "manual" or "automatic". "Manual" or "automatic" operation hold is reset so that it can be restarted naturally in a safe state, and the ink lock to ensure safety is performed by the machine itself, so there is no need to understand the ink lock each time, and it is easy to operate. This reduces the time it takes to get used to it and makes it easier for anyone to use.

[Brief explanation of the drawing]

The drawing is a circuit configuration diagram of an embodiment of the device according to the present invention. In the diagram, 1 is the pump electric motor, 2 is the no-fuse breaker,
3 is the coil of the electromagnetic switch, 3a and 3b are the same contacts, 4a,
4b and 4c are pushbutton switch contacts for energizing the "manual" operation circuit, 5 is an overload protection contact for the electromagnetic switch, 6,
7 is a no-fuse breaker for protecting the control circuit, 8 is a holding relay coil for the "manual" operation circuit, 8a and 8b are the same contacts,
8c is a manual indicator light, 9 is a "manual" operation circuit, and 9a is a single-action operation "on" and "off" selector switch that is connected to the manual operation circuit and starts or stops any one of the plurality of single-action operations that does not automatically return. Contact 10a conducts when it is ``off'', and 10a is a manual operation that does not automatically return to start and stop other single-acting operations.
11 is a relay coil for maintaining motor rotation; 11a is the same contact; 12 is a relay coil for "semi-automatic"; 12a, 12
b is the same contact, 13 is the relay coil for "fully automatic" operation holding, 13a and 13b are the contacts of the relay coil 13, 13c is the indicator light of the relay coil for fully automatic operation holding, 14 is the timer coil, 14a is the same contact, 15a is a pump stop pushbutton switch, 16a and 16b are automatic return type pushbutton switches for checking the rotational direction of the pump motor, 17a and 17b,
17c and 17d are contacts of a push button switch for "semi-automatic" operation, 17e is an indicator light of a relay coil for maintaining semi-automatic operation, 18 is a "semi-automatic" operating circuit, and 19a, 19b. 19c and 19d are contacts of push button switches for "fully automatic" operation, 20 is a "fully automatic" operating circuit, and 21a. 21b is a leg button switch 21 that can be used to pause and start the pump.
contact point.

Claims (1)

[Scope of Claims] 1. An operation starting means comprising at least a switch for "manual" operation and an "automatic" operation, an electric motor for a hydraulic pump that is rotated by the operation of the operation starting means, and an electric motor for a hydraulic pump that is rotated by the operation of the operation starting means. After operation, a holding means for holding the rotation of the pump electric motor, an "automatic" operating circuit for continuously operating a plurality of operations in a predetermined order by a hydraulic power source, and a "manual" operating circuit for performing individual operations. an operating circuit; a delay closing means for causing a predetermined delay in the closing operation of either the "automatic" operating circuit or the "manual" operating circuit after the rotation of the pump motor; A "manual" and "automatic" selection and holding circuit is provided for causing the rotation of the pump electric motor and the selection and continued holding of the "manual" or "automatic" operation circuit after selection by a starting means. A manual/automatic switching operation circuit using a hydraulic power source. 2. The holding means is a coil of an electromagnetic switch that is energized by operating an operation switch such as "manual" included in the operation start means, and a relay coil for holding the rotation of the pump motor that is energized by a contact attached thereto, 2. The manual/automatic switching operation circuit using a hydraulic power source according to claim 1, wherein the delay closing means is a timer switch that closes when the timer coil expires. 3. The pushbutton switch for both pause and start included in the operation start means resets the self-holding circuit of the other pushbutton switches included in the operation start means during the start operation. Manual/automatic switching operation circuit using hydraulic power source.