JPH0337110Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is designed to transfer signals between at least two control panels provided for a drive working device indirectly by electrically separating them without directly using electrical signals. The present invention relates to a signal conversion device.

The main reason for transferring signals indirectly in this way is to avoid the danger of electricity being supplied from the other control panel even if the power to one control panel is turned off. This signal conversion device is used to make it possible to disconnect connections between control panels and to simplify signal exchange as much as possible. , when the operation cannot be confirmed directly with the limit switch,
This is used when it is necessary to start the next operation after the operation of the equipment has been completed.

By the way, as shown in FIG. 5, the conventional signal conversion device has a solenoid a that is excited by an input signal from one control panel, and a cylinder that expands and contracts as the solenoid a is energized and de-energized. b and the expansion and contraction of cylinder b
The structure is complicated because it consists of a limit switch c that is turned on and off for output to other control panels, and in order to disconnect both control panels, it is necessary to keep the limit switch c operating. The problem was that it was necessary.

The present invention was devised in view of the above circumstances, and its purpose is to provide a signal conversion device that has a simpler configuration than conventional ones and can be turned off when not needed. It's about doing.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in the circuit diagram of FIG. 1, there is an input stage A in which input terminals 2, 2 are connected to a solenoid 1a of a relay 1, and a neon lamp 3 is connected in parallel to the solenoid 1a; While connecting the output terminals 4, 4 to the normally open contact 1b,
A signal conversion circuit C is constructed from an output stage B consisting of a manual open/close switch 5 connected in parallel to the normally open contact 1b, and this circuit C is housed in a compact casing 6 as shown in FIG. A signal conversion device D is configured.

This signal conversion device D, as shown in FIG.
It is interposed between the two control panels 8 and 9 for the driving work device 7, and indirectly transfers signals between these control panels 8 and 9.

That is, if the operating mode is explained based on FIG. 4 A, B, and C, as shown in FIG. One control panel 8 connected to 2,2
When there is no input signal from the input stage A, the neon lamp 3 of the input stage A is not lit and the solenoid 1a is not energized, so the normally open contact 1b is also maintained in the open state.
The output stage B to which the other control panel 9 is connected becomes an open circuit state, and when an input signal is applied from the one control panel 8 to the input terminals 2, 2, the neon lamp 3 lights up. At the same time, the solenoid 1a is energized, the normally open contact 1b is closed, and the output stage B is placed in a closed circuit state. Therefore, when the manual open/close switch 5 is operated in the open state, the activation/deactivation of the other control panel 9 depends on the presence or absence of an input signal from the one control panel 8.

Further, as shown in FIG. 4C, if the manual open/close switch 5 is operated in the closed state, regardless of the presence or absence of the input signal from the one control panel 8, that is, the neon lamp 3, the solenoid 1a, Normally open contact 1
Regardless of the state of b, output stage B is maintained in a closed circuit state and kept in an operable state, and both control panels 8 and 9 are completely separated. That is,
By simply closing the manual open/close switch 5, it is possible to separate the control panels 8 and 9 so that they have no relation to each other.

In the above embodiment, one normally open contact 1b is provided for one solenoid 1a as a signal conversion device for the two control panels 8 and 9, but one solenoid 1a is provided with one normally open contact 1b. By providing a plurality of normally open contacts 1b... for each, the present invention may be configured to be applicable to three or more control panels.

As explained above, the signal conversion device according to the present invention converts an input signal from one of the control panels into the input stage connected to one of at least two control panels provided for the driving work device. A solenoid to be energized and a lamp to be lit by the input signal are connected in parallel, and an output stage connected to the other control panel is provided with a normally open contact that closes when the solenoid is energized. Since it is provided with a manual open/close switch connected in parallel, the configuration is simple and compact, and it can be manufactured at extremely low cost.

According to the signal conversion device, multiple control panels can be connected or disconnected extremely easily by simply opening and closing the manual on/off switch, and signals can be exchanged by lighting the lamps. can be visually confirmed.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the present invention and a conventional device, and FIG. 1 is an overall circuit diagram, and FIG.
The figure is an overall external view, Figure 3 is an explanatory diagram of usage conditions, and Figure 4 is an explanatory diagram of usage conditions.
Figures A, B, and C are explanatory views of the operation, and Fig. 5 is a conceptual diagram of the conventional device. A...Input stage, B...Output stage, 1a...Solenoid, 1b...Normally open contact, 3...Lamp, 5...
Manual open/close switch, 7... Drive working device, 8, 9
……control panel.

Claims (1)

[Scope of utility model registration request] at least two provided for the drive working device;
A solenoid excited by an input signal from one control panel and a lamp lit by the input signal are connected in parallel to an input stage connected to one of the control panels, and A signal conversion device characterized in that an output stage connected to the other control panel is provided with a normally open contact that closes when the solenoid is excited and a manual open/close switch connected in parallel.