JPH075009Y2 - Circuit breaker for signal circuit - Google Patents

Description

TECHNICAL FIELD The present invention relates to a circuit breaker for signal circuits.

2. Description of the Related Art It is stipulated by regulations that a signal light is the most important in vehicle operation, and that all starting and stopping of a vehicle is performed by a signal command. A circuit breaker is used as a protection device against overcurrent or short circuit in this important signal circuit.

Problems to be solved by the invention However, even if there is no accidental failure in the circuit, the circuit breaker opens due to excessive external vibration or momentary pulse generated in the circuit or induced lightning. Has a problem
Often annoying passengers. In particular, since the circuit breaker along with the signal light control device is often installed in an iron box near a railroad where there are many vibrations caused by the vehicle,
Although it is designed to be vibration resistant compared to general circuit breakers, it still causes the tripping operation to occur naturally due to the cumulative effect of excessive vibration and shock caused by repeated release mechanism claws inside the circuit breaker. It often opens and gives a stop signal. In such a case, it may take 30 minutes or more at a distant place to walk in order to re-close the circuit breaker that has been opened to the signal station, which may be a great obstacle to running the vehicle.

Means for Solving the Problems In the present invention, such an illegal or unnecessary operation accident is attempted to be solved by automatic selection by a circuit breaker with a special structure that is a combination of an opening mechanism and an extension of a push button. Is. The signal circuit breaker of the present invention is a main circuit section (X) (for convenience of explanation, it is referred to as (X). The same applies to the following (Y),
(Z). ), A discriminating mechanism (Y), and (Z).

Thus, the present invention has a main circuit section (X) and a discrimination mechanism section (Y).
A circuit breaker for a signal circuit, comprising: a switch terminal (Z) and a switching operation section (Z), wherein the main circuit section (X) includes a power supply terminal (1) and a load terminal (2).
, The electromagnetic coil (3), and the normally-closed main circuit contact (a) are connected in series, and the discrimination mechanism (Y) includes the first and second hook plates (25b) (25b).
a) a release mechanism (25), a movable iron piece (13),
It has a half-moon trip shaft (14) and a second hook plate (25
a) includes the claw (25c) and the trip roller (26a), and the first
The hook plate (25b) of the tab (25d) and the trip roller (26
b) and is rotatably supported (27), and the movable iron piece (1
3) is attracted according to the current flowing through the electromagnetic coil (3), has a protrusion (13b) at the other end, and is rotatably supported (13a), and the half-moon trip shaft (14). ) Has a trip lever (24) at the other end and is rotatably supported, and has a claw (25c) of the second trip plate (25a) and a claw (25d) of the first hook plate (25b). The opening / closing operation section (Z) is locked to the first and second push buttons (10) and (11),
It has an alarm contact part (b) and has first and second push buttons (10) (1
1) is extended by springs (33 ′) and (33) in the pop-out direction, and has an extension (21 ′) having inclined portions (28 ′) and (28).
(21), the inclined portions (28 ') and (28) respectively have the first hook plate (25b) at the pushed-in position.
Of the second push button (1) which is engaged with the trip roller (26b) of the second hook plate (25a) and the trip roller (26a) of the second hook plate (25a).
1) closes the main circuit open / close contact (a), and the first push button (1
0) has a protrusion (30), and the movable iron piece (13) has a protrusion (13b) and a trip lever (24) when the current flowing through the electromagnetic coil (3) is a temporary or instantaneous pulse or vibration overcurrent. ), The half-moon trip shaft (14) is rotated, the engagement with the claw (25d) of the first hook plate (25b) is released, and the trip roller (26b) of the first hook plate (25b) is released. ) Is the inclined portion (2) of the first push button (10).
8 ') and the first push button (1
0) moves to the pop-out position, and the protrusion (30) operates the alarm contact part (b) to display a predetermined alarm, and when the current of the electromagnetic coil (3) is a continuous short-circuit current, half a month The rotation of the trip shaft (14) causes the second hook plate (25
The trip roller (26a) of the second hook plate (25a) becomes the inclined portion (28) of the extension (21) of the second push button (11) by releasing the engagement with the claw (25c) of a). Is a circuit breaker for a signal circuit in which the second push button (11) is moved to the pop-out position to open the main circuit opening / closing contact portion (a) by releasing the engagement.

In this way, in the circuit breaker of the present invention, the alarm contact is provided in the first operation stage when the phenomenon immediately disappears even if the phenomenon occurs for a very short time such as a temporary pulse or a momentary shock. An alarm is displayed by lighting via the LED, but the energizing current is not cut off and the signal command is not hindered, and the overcurrent continues or the short-circuit current continues after the first operation stage is started. If it flows, it will be immediately reflected in the second operation stage, and the circuit breaker will open to protect the circuit. Also, during this time, before the next phenomenon occurs, the first
By pressing the closing button again at the operation stage and re-closing, the unnecessary operation can be avoided by keeping the previous standby state. In other words, if there is no failure in the circuit, even if there is an excessive vibration from the outside or a momentary pulse or induced lightning that occurs in the circuit, if the phenomenon disappears immediately, the circuit will not be cut off, and of course it will be excessive. When a short-circuit current is generated, the circuit of the energizing current is immediately cut off to protect the circuit and prevent unnecessary operation accidents of the signal lamp, which is most important for the operation of the vehicle.

Embodiment Next, an embodiment of the circuit breaker of the present invention will be described. FIG. 1 is a normal simplified circuit connection diagram of the circuit breaker according to the present invention, and FIG. 2 is a front view of the circuit breaker according to the present invention when the cover is removed. The main circuit portion (X )
Then, an overcurrent detecting portion, that is, an electromagnetic coil (3) and a main circuit opening / closing contact portion (a) are connected in series between the power supply terminal (1) and the load terminal (2). The main circuit opening / closing contact portion (a) is composed of a fixed contact (4) connected to the power supply terminal (1) and a movable contact (5) connected to the load terminal (2) through the electromagnetic coil (3). Although the electromagnetic portion for overcurrent detection, that is, the electromagnetic coil (3) is not shown, it is adjusted to the characteristics of the load.
It can be considered as a normal circuit breaker in which a plunger and a return spring are sealed together with silicon oil by magnetic poles in a non-magnetic cylinder, and a coil is wound on the outside. In addition, the release mechanism (25) spatially included between the electromagnetic coil (3) and the main circuit opening / closing contact portion (a) in the discriminating mechanism portion (Y) and the first and the first in the opening / closing operation portion (Z). Extension parts (21 ') and (21) connected to the second push buttons (10) and (11) are provided. Figures 3 and 4
5 and 5 are front views showing the relationship between the release mechanism (25) according to the present invention and the half-moon trip shaft (14) by the hook plates (25a) and (25b), and FIG. 6 is the two hook plates (25a). ),(twenty five
Fig. 7 and Fig. 8 are side views of push buttons (11) and (10), front views, Fig. 9 and Fig. 10 show push buttons (10) and (11). FIG. 3 is a simplified diagram showing the relationship between the alarm contact part (b) and the main circuit opening / closing contact part (a) via the respective extension parts (21 ′) and (21). The release mechanism (25) has a slightly different diameter as shown in FIG. 6 and has stepped claws (25
d) and (25c) and about 1/4 circumference first and second hook plates (25b) and (25a) are always biased counterclockwise about the common axis (27). Hook plate (25b), (2
5a) has a trip roller (26b), (26a) at one end.
Are rotatably mounted around shafts (36) and (35), and these trip rollers (26b) and (26a) are extended portions (21 ') and (21) of push buttons (10) and (11), respectively. ) Of the inclined part (28 '), (28). Also, due to momentary vibrational overcurrent flowing in the overcurrent detecting portion, that is, the electromagnetic coil (3), the movable iron piece (13) is attracted to the magnetic pole (22) in FIG. 2 and centered around the shaft (13a). Rotation and protrusion (13b)
Also moves in unison with the trip lever (24), and the hook (25d) of the first hook plate (25b) is disengaged from the half-moon trip shaft (14) which is integral with the trip lever (24). The trip spring (26b) moves from the inclined portion (28 ') to the ninth position by the pushing force of the cutoff spring (33') against the push button (10).
As shown in the figure, the protrusion (30) pushes the tongue of the microswitch (b), which is the alarm contact portion, to switch it, and display the first operation stage. Further, if a continuous excessive short-circuit current flows through the electromagnetic coil (3), the half-moon trip shaft (14) acts through the magnetic pole (22) and the movable iron piece (13), and the sixth
The hook (25c) of the second hook plate (25a) in the figure is disengaged, and the pushing force of the breaking spring (33) in Fig. 8 is activated, and the trip roller (26a) tilts as shown in Fig. 10. The movable piece (16) connected to the lower end of the extension portion (21) via the connection shaft (18) by moving up from the portion (28) and the extension portion (21) moves the movable contact piece (5) around the shaft (20). Along with this, it opens from the fixed contact (4) and interrupts the energizing current of the main circuit opening / closing contact portion (a), which is the second operation stage. The movable piece (16) is fitted with an elliptical hole (16 ') on a shaft (20) provided on the base and provided with a contact pressure spring (17) so that the movable contact (5) is always fixed (4). ). Other (3
1) is a manual release push button, the tip of which is directly movable iron piece (13)
By pressing against the magnetic pole (22), the alarm contact portion (b), which is a microswitch, can be directly opened and closed. In the alarm contact part (b) which is a micro switch, the movable contact (9) interlocking with the push button (10) as shown in FIG.
Turns ON / OFF the alarm display (not shown) between the fixed contacts (6) and (7).

Effects of the Invention As described above, the circuit breaker according to the present invention provides only an alarm display when a temporary pulse or momentary vibration overcurrent occurs (this is the first operation stage), and an excessive short-circuit current is generated. The extension plate (21 ') connected to the unique release mechanism (25) and the push buttons (10), (11), so as to cut off the energizing current in case of continuous overcurrent (this is the second operation stage), Most important for vehicle operation by automatically selecting the two stages through the combination with (21) and the connection with the alarm contact (b) and the main circuit switching contact (a). Unnecessary signal lights,
It is possible to sort out fraudulent accidents.

[Brief description of drawings]

FIG. 1 is a normal simplified circuit connection diagram of the circuit breaker according to the present invention, FIG. 2 is a front view of the circuit breaker according to the present invention when the cover is removed, and FIGS. 3, 4, and 5 are First and second hook plates (25b), (25a) of the release mechanism (25) according to the present invention
Fig. 6 is a front view showing a different relationship with the half-moon trip (14) by Fig. 6, Fig. 6 shows two hook plates (25b), (25b) and (25).
a) The slant view showing the state of being displaced, FIGS. 7 and 8 are the side views of the push buttons (11) and (10), the front view, FIG. 9 and FIG. 10 are the push buttons (10) and (11). Through extension (21 ') (21) of
FIG. 3 is a simplified diagram showing the relationship between the trip rollers (26b) and (26a) of the first and second hook plates (25b) and (25a), the alarm contact portion (b), and the main circuit opening / closing contact portion (a). In the figure, (3) is an overcurrent detection section or electromagnetic coil, (a) is a main circuit opening / closing contact section, (4) is the same fixed contact, (5) is the same movable contact, and (b) is a microswitch or alarm contact section. ，
(10) and (11) are push buttons, (13) is a movable iron piece, (14) is a half-moon trip shaft, (16) is a movable piece, (21) is an extension of the push button (11), and (21 ') is a push button. (10) extension, (24) trip lever, (25) release mechanism, (25a), (25b) first
2, the first hook plate, (25c), (25d) are stepped claws, (26
a), (26b) are trip rollers, (27) are hook plates (25
c), the common axis of (25d), (28) the inclined part of the extension (21), (28 ') the inclined part of the extension (21'), (17), (3
3) and (33 ') are springs.

Claims (1)

[Scope of utility model registration request] 1. A main circuit section (X), a discriminating mechanism section (Y),
A circuit breaker for a signal circuit having an opening / closing operation section (Z), wherein a main circuit section (X) includes a power supply terminal (1) and a load terminal (2).
, The electromagnetic coil (3), and the main circuit opening / closing contact part (a) that can be normally closed are connected in series, and the discrimination mechanism part (Y) includes the first and second hook plates (25b) (25b).
a) a release mechanism (25), a movable iron piece (13),
It has a half-moon trip shaft (14) and a second hook plate (25
a) includes the claw (25c) and the trip roller (26a), and the first
The hook plate (25b) of the tab (25d) and the trip roller (26
b) is rotatably supported, and the movable iron piece (13) is attracted according to the current flowing through the electromagnetic coil (3), and has a protrusion (13b) at the other end. Then, it is pivotally supported (13a) and the half-moon trip shaft (1
4) has a trip lever (24) at the other end and is rotatably supported by a shaft, and has a claw (25c) of the second trip plate (25a) and a first trip plate (25a).
Is engaged with the claw (25d) of the hook plate (25b), and the opening / closing operation part (Z) has first and second push buttons (10) (11) and an alarm contact part (b), First and second push buttons (10) (11)
Are respectively urged by springs (33 ′) and (33) in the protruding direction, and extension portions (21 ′) (2) having inclined portions (28 ′) (28) are provided.
1), the inclined portions (28 ′) (28) of the first hook plate (25b) and the second hook plate (25a) respectively have the inclined portions (28 ′) (28) at the pushed-in position. It is engaged with the trip roller (26a) and has a second push button (1
1) closes the main circuit open / close contact (a), and the first push button (1
0) has a protrusion (30), and the movable iron piece (13) has a protrusion (13b) and a trip lever (24) when the current flowing through the electromagnetic coil (3) is a temporary or instantaneous pulse or vibration overcurrent. ), The half-moon trip shaft (14) is rotated, the engagement with the claw (25d) of the first hook plate (25b) is released, and the trip roller (26b) of the first hook plate (25b) is released. ) Is the inclined portion (2) of the first push button (10).
8 ') and the first push button (1
When (0) moves to the pop-out position and the protrusion (30) operates the alarm contact (b) to display a predetermined alarm and the current of the electromagnetic coil (3) is a continuous short-circuit current, a half-month trip occurs. The rotation of the shaft (14) causes the second hook plate (25
The trip roller (26a) of the second hook plate (25a) becomes the inclined portion (28) of the extension (21) of the second push button (11) by releasing the engagement with the claw (25c) of a). A circuit breaker for a signal circuit, in which the second push button (11) moves to the pop-out position to open the main circuit opening / closing contact portion (a) by disengaging the engagement.