JPH0158815B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circuit or disconnection alarm device.

This alarm device operates an alarm switch in conjunction with the tripping operation of a circuit or disconnector, and the switch operates an alarm buzzer, lamp, etc. A conventional alarm device for this type of circuit breaker (for example, Utility Model Application No. 54-61261) has a trip mechanism 101 of a circuit breaker 100 as shown in FIGS. 11 and 12. A link 102 is added, and a pin 103 is provided at the free end of the link 102 to protrude (perpendicular to the plane of the paper) from the rotation plane (plane of the paper) of the trip mechanism 101. The plate 105 was activated. In this way, the tripping operation of the tripping mechanism 101 is controlled by a new component (link 1
02 and pin 103) to amplify its operation and operate the switch 104, the number of parts increases, which makes assembly of the circuit and disconnector complicated and expensive. Ta. In addition, the handle, trip link, link, and movable contact plate are sequentially connected in almost the same rotation plane, and an elastic plate is arranged so as to be able to engage with the movable shaft of the link, and the alarm switch is activated by the movement of the elastic plate by the movable shaft. There was something to do (for example,
No. 54-14933), the alarm switch is fixed to the fixed shaft of the tripping mechanism, so the installation work is troublesome, and since the elastic plate is interlocked with the trip, precision is required in the shape of the elastic plate. The drawback was that it was troublesome to install.

Therefore, an object of the present invention is to provide a circuit or disconnector that can operate an alarm switch without increasing the number of parts of the trip mechanism, is easy to install, and does not require precision in shape or position. The purpose is to provide an alarm device.

The present invention provides a container body, a handle, a trip link, a link, and a movable contact plate built into the container body, which are successively linked and connected in substantially the same rotation plane, and which connect to the plane at a position deviated from the rotation plane. a trip mechanism having a trip lever supported by the link so as to be rotatable in parallel to latch the trip link and released and rotated by an overcurrent detection element; and a holder attached to the body and provided with a latch part. It has a switch body that is held by the holder and has a switch button protruding therefrom, a trip arm that is pivotally supported at one end by the holder and presses the switch button by rotation, and has a switch body that is pivotally supported at the other end of the trip arm. A hook portion is provided so that the trip arm is hooked to the latch portion when the switch button is pressed, and the hook portion is located within a rotation range of the trip lever when the trip arm is hooked to the latch portion. The trip plate is provided with a trip lever receiving part that is provided between the holder and the trip plate, and the trip plate is provided between the holder and the trip plate to bias the trip plate in a direction in which the hooking part is hooked to the latch part, and the trip arm is an alarm switch having a return spring biased in a direction away from the switch button; when the trip mechanism is tripped, rotation of the trip arm by the return spring is regulated by the movable contact plate; When turned on, the trip arm is pressed by the movable contact plate to lock the hook portion of the trip plate to the latch portion.

According to the configuration of the present invention, by shifting the trip lever to a position out of the rotation plane of the trip mechanism, the trip lever receiving portion of the alarm switch can be positioned within the rotation locus of the trip lever. Since there is no need to add new dedicated parts to the system, the number of parts can be reduced. Moreover, if you do not install an alarm switch, you can use it as a circuit breaker or disconnector without an alarm device.
In this case, no useless parts are left in the container. Furthermore, since the alarm switch is attached to the device body, it is easier to install compared to conventional examples, and since the trip lever receiving portion of the trip plate only needs to be placed within the rotation range of the trip lever, the shape and position of the trip lever receiving portion can be adjusted. accuracy is not required.

A circuit breaker to which an embodiment of the present invention is applied is shown in FIGS. 1 to 10. That is, 1 is a circuit breaker body, and includes a pair of covers 2 with one opening, which are composed of a side plate 2a, upper and lower plates 2b, 2c formed on the upper, lower, left and right sides of this side plate 2a, and left and right side plates 2d, 2e. Connect the front and back facing each other. Numeral 3 is a stud that holds the cover 2 together.
It is inserted through holes 4' formed at the four corners of the top, bottom, left and right of the side plate 2a and tightened. Reference numeral 4 denotes a U-shaped mounting bracket for this circuit shield and disconnector, which has a screw hole 5 for a mounting screw in the center and holes 6 for inserting rivets 3 at both ends. It is fitted into the formed groove 7 for positioning, and the side plate 2a of the cover 2 is fitted, and the upper left and right studs 3 are inserted through this hole 6 and the hole 4' of the cover 2 to attach it. Reference numeral 8 denotes a holding plate installed in the container body 1, and includes a vertical board 8a, a side plate 8b formed by bending the front and rear sides of the vertical board 8a to the right, and a side plate 8b formed by bending the lower side of the vertical board 8a to the left. The projecting piece 8d at the lower end of the side plate 8b fits into the recessed receiving part 2f formed at the center of the lower end of the side plate 2a of the cover 2, and the side plate 8b
Both ends of the handle pin 10, which is inserted through the hole 9 formed at the upper end and bridged between the side plates 8b, are fixed to the container body 1 by fitting into the hole receiving part 2g formed at the center of the upper end of the side plate 2a of the cover 2. It is. Reference numeral 11 denotes a handle, which is centrally supported by the aforementioned handle pin 10, and one end of which is the operating end 11a and the upper plate 2b of the container 1.
The other end protrudes from the window hole 1a formed in the hole 1a and forms a forked cam end 11b. 12 is the handle 11
This is a hole into which the handle pin 10 formed in the hole is inserted. 13 is a trip link whose upper end 13a fits into the cam end 11b of the handle 11, and supports both 13a and 11b with a support shaft 14. Reference numeral 15 designates a hole through which the support shaft 14 formed at the cam end 11b of the handle 11 is inserted, and reference numeral 16 represents a hole through which the support shaft 14 is inserted, formed at the upper end 13a of the trip link 13. Reference numeral 17 denotes a return spring for the handle 11, which holds the handle pin 10 by inserting it into the winding circuit 17a, hooking one end 17b of the winding circuit 17a onto the side plate 8b of the holding plate 8, and pulling the other end 17c onto the support shaft 14. Hang handle 11
A counterclockwise spring force is imparted to the . Reference numeral 18 denotes a link, which is composed of front and rear side plates 18a and 18b and a connecting plate 18c that connects the upper right sides of the front and rear side plates 18a and 18b.
are inserted, and both 18d and 13b are pivotally supported using studs 19. 20 is a stud 19 formed on the link 18
The hole 21 is formed in the trip link 13 and the stud 19 is inserted therethrough. Therefore, the trip link 13 rotates around the stud 19, and the clockwise rotation is caused by the stopper piece 13c formed between the upper end 13a and the lower end 13b of the trip link 13 and the connecting plate 18c of the link 18. It will stop at the position where it comes into contact with. Reference numeral 22 is a trip lever consisting of a lever part 22a and a shaft part 22b fixed to one end of this lever part 22a, and a notch part 22c with a semicircular shaft cross section is formed in the center of this shaft part 22b. There is. Furthermore, this shaft portion 22b is inserted into a hole 23 formed at the upper left end of the link 18, and an E-shaped retaining ring 24 is fitted to the end of the shaft portion 22b to prevent it from coming off. Thus, the trip lever 22 is connected to the link 18.
is placed out of the rotation plane of the Reference numeral 25 denotes a trip lever spring; the shaft portion 22b of the trip lever 22 is inserted into the wound portion 25a to hold it, one end 25b of the wound portion 25a is hooked to the side plate 18a of the link 18, and the other end 25c is connected to the trip lever spring 25. 22 and applies a clockwise spring force to the trip lever 22 around the shaft portion 22b. 18d is link 1
This is a hook piece for a trip lever spring spring 25 which also serves as a rotation stopper for the trip lever 22 formed at 8. And the lever part 22a of the trip lever 22
is formed on the link 18 and is in contact with the hook piece 18d, the hook piece 13d formed on the left end of the trip link 13 is attached to the shaft portion 22b of the trip lever 22.
is in a hooked state, and the rotation of the trip link 13 about the stud 19 is stopped in both clockwise and counterclockwise directions.Furthermore, when the trip lever 22 rotates counterclockwise, the hook piece 13d of the trip link 13 is stopped. The trip link 1 is fitted into the notch 22c of the trip lever 22.
3 rotations can now be performed. 26 is a movable contact, and 27 is a movable contact plate with the movable contact 26 fixed at the right end.The center of this plate is inserted into the lower end 18c between the side plates 18a and 18b of the link 18, and the rivet 2 is inserted.
8 to support both. 29 is a hole formed in the side plates 18a, 18b of the link 18, through which the stud 28 is inserted; 30 is a hole formed in the movable contact plate 27, and the stud 28 is inserted therethrough;
This hole is inserted through the hole. The point of this hole 30 becomes the point of action of the opening/closing operation. 31 is a long hole formed at the left end of the movable contact plate 27, 32 is a support shaft that is inserted through this long hole 31, and both ends of this support shaft 32 are inserted into a hole 33 formed at the lower end of the side plate 8b of the holding plate 8. By inserting it, the movable contact plate 27 is pivotally supported on the holding plate 8.
Reference numeral 34 denotes an opening spring, which includes coil spring parts 34a and 34b through which a support shaft 32 is inserted between the side plate 8b of the holding plate and the movable contact plate 27, and one end of the coil spring parts 34a and 34b facing each other. It consists of an action part 34c that is hooked on the connected movable contact plate 27 and hook pieces 34d and 34e that are formed on the other ends of the coil spring parts 34a and 34b and that are hooked to the side plate 8b of the holding plate 8. A counterclockwise spring force is applied to the movable contact plate 27 by hooking it onto a key piece 8e formed by bending the lower ends inward. The coil spring portion 34 of this opening spring 34
A, 34b, the movable contact plate 27 is positioned between the side plates 8b of the holding plate 8 without wobbling. In this way, the handle 11, the trip link 13, the link 18 and the movable contact plate 27 are linked in substantially the same rotation plane, and together with the trip lever 22 which rotates in another parallel plane apart from the rotation plane, the trip mechanism It consists of 27a is a switch reset protrusion formed on the movable contact plate 27. 35 is a fixed contact that separates from the movable contact 26; 36 is an inverted L-shaped terminal plate with the fixed contact 35 fixed at one end; Fix it. Reference numeral 38 denotes an armature of the overcurrent detection element, which includes a substrate 38a, a suction plate 38b formed by bending the upper side of the substrate 38a to the left, and the substrate 38a.
Balancer plate 38 formed by bending the rear side to the right
c and an action plate 38d formed by bending the front side of this substrate 38a left and right, and this balancer plate 38
c and the action plate 38d are fitted into the middle between the side plates 8b of the holding plate 8, and the armature 38 of the holding plate 8 is pivotally supported by the support shaft 39. 40 is a support shaft 3 formed on the balancer plate 38c and the action plate 38d of the armature 38.
A hole 9 is inserted, and a hole 41 is a hole through which a support shaft 39 formed on the side plate 8b of the holding plate 8 is inserted. 42 is an amateur spring spring, and the winding portion 42a is connected to the support shaft 3 between the balancer plate 38c and the action plate 38d.
9 is inserted and held, one end 42b is hooked to the lower side of the board 38a of the armature 38, the other end 42c is hooked to the side plate 8b of the holding plate 8, and the armature 38 is fitted with a clockwise spring around the support shaft 39. It gives power. The clockwise rotation of the gusset 38 is stopped when the protruding piece 38e formed at the lower end of the balancer plate 38c comes into contact with the holding plate 8. 38f is an extrusion projection formed at the lower end of the action plate 38d of the armature 38, which separates from the lever portion 22a of the trip lever 22. 43 is a coil, 44 is a coil frame that holds the coil 43, 45 is a pot, and a holding plate 8
A coil frame 44 is placed so as to be in contact with the vertical substrate 8a and the horizontal plate 38c, and the coil frame 44 and the horizontal plate 8c are inserted through a pot 45 and fixed. The pot 45 has a bottomed cylindrical cylinder 45a with a return spring 45b and a movable iron core 45c installed inside the cylinder 45.
a is closed by a head 45d. Note that brake oil or the like may be put into the cylinder 45a. The head 45d of this pot 45 faces the suction plate 38b of the armature 38. 46
is the cylinder 4 of the pot 45 formed on the horizontal plate 8c.
5a is a hole into which the cylinder 45a is fitted and fixed with solder, adhesive, or the like. A braided wire 47 connects one end 43a of the coil 43 and the movable contact plate 27. 48 is the other end 4 of the coil 43
3b is connected to the lower plate 2 of the container body 1.
It is fitted and fixed into the groove 49 formed at the left end of c. 5
0 is a back plate which closes the alarm switch mounting hole 51 formed in the center of the lower plate 2c of the container body 1. 5
Reference numeral 2 denotes an alarm switch (FIG. 8), which is attached to the mounting hole 51 in place of the back plate 50 when the circuit or disconnector is provided with an alarm function. Reference numeral 53 denotes a switch body which is a micro switch as an example, and has a switch button 53a on its upper surface. 54 is the switch body 5
A pair of holders (both identical) that hold 3.
By interconnecting the holders 54, the micro switch 53 is held between the bearings 54a and the latch portions 54b so as to face each other at both ends of the upper surface.
A spring receiving groove 54c is formed on the inner surface of the holder 54 near one side of the bearing 54a.
54d is a switch engagement protrusion, which is connected to the switch body 53.
is fitted into an engagement recess (not shown). 54e is an interconnecting protrusion of the holder. These holders 5
4 are formed in the same shape, so they can be manufactured with one mold, and there is no directionality for mounting. Reference numeral 55 designates a trip arm, with a rotating shaft 55a protruding from both sides at one end, and a trip plate 56 crimped at the other end.
It is rotatably mounted by 6'. This trip plate 56 has a hook portion 56a formed at its lower end, and its upper end extends for a predetermined length, and the trip lever portion holder 56a is formed at its lower end.
6b. 57 is a return spring whose winding portion 5
7a and the short end 57b are supported by the spring receiving groove 54c, and the long end 57c is elastically engaged with the trip plate 56 beyond its center of rotation. The trip arm 55 has a shaft 55a mounted on one end of the bearing 54a (FIG. 9), and a long end 5 of the spring 57.
7c in the direction of rotation (arrow Q in FIG. 9), and the tip of the long end 57c of the spring 57 urges the trip plate 56 to rotate in the direction of arrow R in FIG.
Tilt the trip arm 55 horizontally (in the opposite direction to the arrow Q) against the spring 57, press the button 53a of the switch body 53, and hook the hook portion 56a of the trip plate 56 to the latch portion 54b. (Latch), the trip plate 56 is placed in a vertical position (the state shown in FIG. 9). 58 is a terminal board. and,
When the holder 54 is attached to the attachment hole 51, the trip lever receiving portion 56b is inserted as shown in FIG. 4a.
are arranged opposite to the trip rotation side of the lever portion 22a of the trip lever 22. Further, a signal line (not shown) is connected to the terminal plate 58 of the switch 52.
Controls the drive circuits for the maintenance room's buzzers and indicator lamps.

To explain the operating state of this circuit breaker, FIG. It is pressed against the lower end side. Moreover, this rotation is stopped when the left end of the movable contact plate 27 comes into contact with the base plate 8a of the holding plate 8. Furthermore, the operating end 11a of the handle 11 is tilted to the left, and the cam end 11b pulls up the upper end 13a of the trip link 13, and the lower end 13b of the trip link 13 pulls up the upper end 18d of the link 18.
3c and the connecting plate 18c of the link 18 are in contact with each other, and since the trip lever 22 is applied with a clockwise spring force by the trip lever spring spring 25, the hooking piece 13d of the trip link 13 is attached to the shaft portion 22b of the trip lever 22. It's getting stuck. Further, the armature 38 is applied with a clockwise spring force by the armature spring spring 42, and the stopper piece 38e comes into contact with the holding plate 8 and is stopped.

When the handle 11 is tilted to the right from this off state, the cam portion 11b pushes down the upper end 13a of the trip link 13, thereby causing the trip link 1
The hook piece 13d of No. 3 is attached to the shaft portion 2 of the trip lever 22.
2b, the lower end 13b of the top link 13 pushes down the upper end 18d of the link 18, and this lower end 18e pushes down the movable contact plate 27 so that the support shaft 32
It will be rotated around. When the movable contact plate 27 rotates and the movable contact 26 comes into contact with the fixed contact 35, the movable contact plate 27 rotates around the contact point Y.
The left end of 7 is pushed down and the support shaft 32 moves inside the elongated hole 31, and the spring force of the return spring 34 causes the contact 26,
Thus, contact pressure is applied to 35. Moreover, at this time, a counterclockwise rotational force is applied to the trip link 13 around the stud 19, and a clockwise rotational force is applied to the link 18 around the stud 19, so that the link 18 is stopped in the ON state as shown in FIG. In other words, the straight line X connecting the handle pin 10 and the stud 28
Since the support shaft 14 is on the left side and the rivet 19 is on the right side, the rotation of the handle 11 is also stopped by the rotational force of the trip link 13. At this time, the lever portion 22a of the trip lever 22 faces the extrusion projection 38f of the armature 38. Therefore,
By closing the contacts 26 and 35, a current flows through the terminal plate 36, the fixed contact 35, the movable contact 26, the movable contact plate 27, the braided wire 47, the coil 43, and the terminal plate 48.

Furthermore, when this current becomes an overcurrent such as a short circuit current or an overload current, the movable iron core 45c is attracted to the head 45d by the magnetic flux generated in the coil 43, and an attractive force is generated to attract the attraction plate 38b of the armature 38 of the pot 45. Eventually, the suction plate 38b of the armature 38 is suctioned. When the armature 38 is attracted, the extrusion protrusion 38f pushes the lever part 22a of the trip lever 22, rotates the shaft part 22b, releases the hook 13d of the trip link 13, and rotates the trip link 13 in the counterclockwise direction. occurs, resulting in the state shown in Figure 6. At the same time, due to the rotation of the lever portion 22a,
The trip plate 56 of the alarm switch 52 is pressed as shown in FIG. 6a. As a result, the trip plate 56 rotates against the spring 57 in the direction opposite to the arrow R in FIG. That is, it rotates as shown in FIGS. 7 and 10, and the button 53a of the microswitch 53 is released from the pressed state and protrudes. As a result, the normally closed contact of the switch 53 changes from open (off) to closed (on), allowing the drive circuit to perform an alarm operation. The rotated trip arm 55 is regulated by the reset protrusion 27a of the movable contact plate 27. Furthermore, the handle 11 is reversed to the left by the handle spring spring 17, and the movable contact plate 27
is rotated in the opening direction by the return spring 34 to return to the state shown in FIG.

The trip arm 55 is reset by turning the handle 11 from the OFF state (corresponding to FIG. 4) in FIG. 7 to the ON state (FIG. 5). In other words, when the movable contact plate 27 turns on,
The reset protrusion 27a pushes down the trip arm 55 against the spring 57, and as a result, the hook portion 56a of the trip plate 56 is latched to the latch portion 54b by the spring action, and at this time the trip arm 5
5, the switch button 53a is pressed.

As described above, the circuit breaker alarm device of the present invention moves the trip lever responsive to the overcurrent detection element away from the rotational plane of the trip mechanism including the handle, the trip link, the link and the movable contact plate, and parallel to the trip lever. Since the passive part of the alarm switch is placed on the trip lever, the number of parts can be reduced compared to conventional models, making assembly easier and cheaper, and the alarm switch can be simply attached to the circuit or disconnector. Alarm operation can be activated with just one button, and a common hole in the parts can be established. Furthermore, since the alarm switch is attached to the device body, it is easier to install compared to conventional examples, and since the trip lever receiving portion of the trip plate only needs to be placed within the rotation range of the trip lever, the shape and position of the trip lever receiving portion can be adjusted. This has the effect that accuracy of 1 is not required.

[Brief explanation of drawings]

Fig. 1 is a perspective view from above on the right side of a circuit breaker to which an embodiment of the present invention is applied, Fig. 2 is an exploded perspective view of Fig. 1, and Fig. 3 is the main part of Fig. 2. The perspective view, FIG. 4 shows the off state, FIG. 5 shows the on state, and FIG. 6 shows the trip state. In FIGS. 4 to 6, a is a front view with the cover removed, and b is the main 7 is a front view of the alarm switch in an operating state; FIG. 8 is an exploded perspective view of the alarm switch; FIG. 9 is a front view thereof; FIG. 10 is a partial front view of the alarm switch in an operating state; The figure is a sectional view of the conventional example, the 12th
The figure is a sectional view of the tripped state. 1... Vessel body, 11... Handle, 13... Trip link, 18... Link, 22... Trip lever, 2
7... Movable contact plate, 38... Armature of overcurrent detection element, 52... Alarm switch, 53... Switch body, 53a... Switch button, 54... Holder, 54b
... Latch portion, 55... Trip arm, 56... Trip plate, 56a... Hook portion, 56b... Trip lever receiving portion, 57... Return spring.

Claims (1)

[Scope of Claims] 1. A container body, and a handle, a trip link, a link, and a movable contact plate built into the container body, which are successively linked and connected in substantially the same rotation plane, and at a position outside the rotation plane. a trip mechanism having a trip lever supported by the link so as to be rotatable in parallel with the plane to latch the trip link and released and rotated by an overcurrent detection element; and a latch portion attached to the body. the switch body has a switch body that is held by the holder and has a switch button protruding therefrom; a trip arm that has one end pivotally supported by the holder and presses the switch button by rotation; A hook portion is provided which is pivotally supported at the end of the trip arm and is hooked to the latch portion when the switch button is pressed, and a rotating range of the trip lever when the hook portion is hooked to the latch portion. a trip plate provided with a trip lever receiving portion located within the holder, the trip plate being provided between the holder and the trip plate to bias the trip plate in a direction in which the hook portion is hooked to the latch portion; an alarm switch having a return spring that urges the trip arm in a direction away from the switch button; when the trip mechanism is tripped, rotation of the trip arm by the return spring is regulated by the movable contact plate; An alarm device for a circuit disconnector, wherein when the contact plate is turned on, the trip arm is pressed by the movable contact plate to lock the hook part of the trip plate to the latch part.