JPH0741656Y2 - Tokime Relay - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an improvement of a time element relay used as a signal control relay for railways and the like.

[Prior Art] A prime relay is a relay that outputs an output when a voltage is applied and the output relay operates after a set period of time elapses. It is a type of timing relay and operates as a delay relay. For example, it is used for time-locking in which the rolling device cannot be unlocked until some seconds have passed even when the signal lever is returned in railway control.

As this type of chronograph relay, a circuit having a circuit as shown in FIG. 3 (A) is generally known. Explaining the operation of this chronograph relay, when a voltage is applied to the chronograph relay, that is, when a voltage is applied to the input terminal (T), the fall contact 23-2 and the resistance (R1) of the auxiliary relay (1R) are ), The auxiliary relay (2R) operates. And its operating contact 21
Auxiliary relay (2R) self-holds. Auxiliary relay (1R) is operated by operating contact 22 of auxiliary relay (2R),
The auxiliary relay (1R) is self-held by the operating contact 23-1. A thyristor (SC
R) is connected, but a thyristor circuit (TE) described later is added to the gate circuit of this thyristor (SCR), so that the thyristor (SCR) does not conduct until a certain period of time elapses.

In the chronograph circuit (TE), the base (B1) is a thyristor (SC).
It comprises an equivalent single junction transistor (EUJT) connected to the gate of R) via a resistor (R4), and resistors (R2, R3) and a capacitor (C1) connected to this emitter (E).

And in the emitter (E) circuit of the equivalent single junction transistor (EUJT), the capacitor (C1) is a resistor (R2),
When a voltage is applied via (R3), the voltage of the emitter (E) becomes higher in the positive direction with respect to the base (B1), and when a certain voltage is reached, the emitter (E) and the base ( B1) shows a stable N-type negative resistance, that is, it becomes conductive and the charge of the capacitor (C1) instantly flows through the resistor (R4) from the gate of the thyristor (SCR) to the cathode, and the thyristor (SCR) It conducts and shorts both ends of the auxiliary relay (2R), so the auxiliary relay (2R) falls. At this time, the set time can be changed by changing the time constants of the resistors (R2, R3) and the capacitor (C1), and the time constant can be easily changed by changing the resistor (R2) as shown in the figure. can do.

Since the operating contact 24 of the auxiliary relay (1R) and the drop contact 25 of the auxiliary relay (2R) are both closed, the output relay (3R) operates. Then, as shown in FIG. 3B, the drop contact of the output contact of the output relay (3R) is opened and the operation contact is closed, thereby controlling various devices connected thereto.

In addition, the fall contact of the auxiliary relay (1R) and the auxiliary relay (2
Since both R) operation contacts open, auxiliary relay (2R),
The voltage of the thyristor (SCR) and the time source circuit (TE) will be cut off.

[Problems to be Solved by the Invention] As described above, the conventional thyme relay operates, but in order to measure the time after the voltage is applied, that is, from the time when the voltage is applied to the time relay, the time is measured. For example, in the case of railway maintenance work, the rails are purposely short-circuited so that the same state as when the train passed, and the time until the hour relay output is measured using an external measuring instrument or a stopwatch etc., and the time setting adjustment The problem is that it is very troublesome.

The present invention has been made in view of the above problems, and provides a time element relay that does not require the use of an external measuring instrument and displays the set time each time the time element relay is activated, so that the time element can be seen at a glance. The purpose is to do.

[Means for Solving the Problem] According to the present invention, the above-mentioned problem is that the auxiliary relay (2R) operates when a voltage is applied to the input terminals (T, T), and the auxiliary relay (2R) operates electronically. A time element circuit (TE) consisting of a circuit causes the output relay (3
R) is activated and outputs by its contact, the auxiliary relay (2R) is connected in series with the auxiliary relay (2R) and detects the current flowing during the operation of the auxiliary relay (2R). And a display section (15) for displaying the operating time of the auxiliary relay (2R) based on the output of the measuring circuit (10). It is solved by using a simple relay.

Strictly speaking, the operating time is the moment when the operating contact of the output relay (3R) is closed after the power input is turned on, but in general, the operating contact is switched after the voltage is applied to the output relay (3R). The time until closing can be ignored compared to the time by the time circuit (TE), so it does not matter as the operating time by measuring the time when the current is flowing through the auxiliary relay (2R).

[Operation] When voltage is applied to the input terminals (T, T), the auxiliary relay (2
R) operates, and the measuring circuit (10) detects the current flowing through the auxiliary relay (2R). The time until the auxiliary relay (2R) falls is measured by the measuring circuit (10), and the time is displayed on the display unit (15).

[Embodiment] The present invention will be specifically described below based on an embodiment shown in the drawings.

FIG. 1 is an enlarged circuit diagram of an essential part showing an embodiment according to the present invention, which has a built-in measuring circuit (10) for measuring a certain time until an input is applied to an hour relay and an output is made. The time is displayed. Note that this time element relay is exactly the same as the operation of the conventional time element relay, and thus detailed description of the operation of each element is omitted.

That is, the measuring circuit (10) includes a photocoupler (11) for detecting the current flowing in the auxiliary relay (2R), a counter (12), a clock pulse generator (13), and a drive circuit (14). It has a display section (15) for displaying the time of the current flowing through the auxiliary relay (2R) using the output of the drive circuit (14) as an input.

The photocoupler (11) is composed of a light emitting diode (LED) connected in series to the auxiliary relay (2R) and a phototransistor (PHT), and emits light when a current flows through the light emitting diode (LED). A current flows in the phototransistor (PHT) by light emission, and is a so-called current detector. Therefore, in this embodiment, the photocoupler (11) is shown in the drawing, but the point is that the auxiliary relay (2)
It is only needless to say that the current flowing in R) can be detected, and the current is not limited to the photocoupler, and other current detectors may be used.

The current flowing in the phototransistor (PHT) by the operation of the photocoupler (11) is input to the counter (12), and the clock pulse (CP) output from the clock pulse generator (13) is input to the counter (12). The clock pulse (CP) is counted by the counter (12) for the operation time of the photocoupler (11). The counted clock pulse (CP) is converted into time by the display unit (15) via the drive circuit (14) and is digitally displayed.

The counter (12) and the display section (15) are reset by the output of the photocoupler (11) by the input of the next time element relay. Further, the power supply of the measuring circuit (10) may be either the time input terminal or the power supply from the outside. However, the use example in which the chronograph input terminal is used as a power supply is effective because another power supply is not required when the chronograph relay is always operating.

2 shows another embodiment, whereas the embodiment shown in FIG. 1 displays the operating time of the auxiliary relay (2R) by detecting the current flowing in the auxiliary relay (2R). In this embodiment, the operating time of the auxiliary relay (2R) is displayed by detecting the voltage applied to the auxiliary relay (2R).

That is, a voltage detection resistor (16) connected in parallel to the auxiliary relay (2R) is provided, and a photocoupler (11) is connected to the resistor (16).
Are connected in series and a measuring circuit (10) similar to that of the embodiment shown in FIG. 1 is provided to measure and display the time of the voltage applied to the auxiliary relay (2R).

The present invention is to display the operating time of the auxiliary relay (2R) immediately by measuring the current or voltage during the operation of the auxiliary relay (2R), and various design changes can be made within the scope of the utility model registration claim. It is a thing.

[Advantage of the Invention] As described above, according to the present invention, the auxiliary relay, which operates by applying a voltage and drops after a certain period of time, has a built-in measuring circuit for measuring a current or an applied voltage. Since the operating time of is displayed on the display unit, there is no need to measure it with an external measuring instrument, and the operating time is always displayed when the thyme relay is operating or when using a separate power source, which is very convenient. Has the practical effect of being

[Brief description of drawings]

FIG. 1 is a circuit diagram of an essential part showing an embodiment of a prime relay according to the present invention, FIG. 2 is a circuit diagram of an essential part showing another embodiment, and FIG. FIG. 6 is a circuit diagram of a conventional chronograph relay, in which (B) is a diagram showing contacts of an output relay. (T): input terminal, (2R): auxiliary relay, (3R): output relay, (TE): hour element circuit, (10): measuring circuit, (1
1): Photocoupler, (12): Counter, (13): Clock pulse generator, (14): Drive circuit, (15): Display, (16): Voltage detection resistor.

Claims (3)

[Scope of utility model registration request] 1. An auxiliary relay (2R) operates by applying a voltage to an input terminal (T, T), and the auxiliary relay (2R) operates.
The output relay (3R) operates by dropping after a lapse of a certain time by a thyme circuit (TE) consisting of an electronic circuit. In the thyme relay that outputs by its contact, in series with the auxiliary relay (2R) It has a built-in measuring circuit (10) that is connected and detects the current flowing during the operation of the auxiliary relay (2R) to measure the operating time of the auxiliary relay (2R), and assists based on the output of the measuring circuit (10). A time element relay characterized by comprising a display section (15) for displaying the operating time of the relay (2R). 2. The measuring circuit (10) comprises the auxiliary relay (2).
R), a photocoupler (11) connected in series, and a counter (12) having the output of the photocoupler (11) as an input,
A clock pulse generator (13) for outputting a clock pulse (CP) to the counter (12), and a drive circuit (14) for outputting the output of the counter (12) to the display section (15). The time element relay according to claim 1, wherein: 3. The auxiliary relay (2R) operates by applying a voltage to the input terminals (T, T), and the auxiliary relay (2R) operates.
The output relay (3R) operates by dropping after a lapse of a certain time by a thyme circuit (TE) consisting of an electronic circuit, and in the thyme relay that outputs by its contact, in parallel with the auxiliary relay (2R). A measuring circuit (10) is provided which is provided with a connected voltage detection resistor (16) and measures the operating time of the auxiliary relay (2R) by detecting the voltage applied to the resistor (16). (1
The time element relay is characterized in that a display section (15) for displaying the operating time of the auxiliary relay (2R) is provided based on the output of (0).