JPH035017B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a switch device in which two circuit breaker mechanisms are provided in conjunction to perform a trip operation when an overcurrent is detected, and to enable remote control.

[Background Art] Conventionally, in a switching device such as a circuit breaker of this kind in which two circuit breaker mechanisms are installed together and trip operation is performed in conjunction with each other, when the latch plate of the trip means is shared, the latches cannot be activated. There were problems in that the tripping operation became unstable as the load increased and reliability deteriorated. Therefore, there has been a system in which each circuit breaker mechanism is provided with a trip means so that the trip means are operated in conjunction with each other, but the interlocking body is an external component, making assembly work difficult. There is also a problem in that the interlocking mechanism becomes complicated when the circuit breaker mechanism is operated remotely from the outside.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and its object is to perform the tripping operation without variation, improve reliability,
Moreover, it is an object of the present invention to provide a switch device to which an electromagnetic device for remote control tripping can be easily added and which is easy to assemble.

[Disclosure of the Invention] Examples Examples of the present invention will be described below with reference to the drawings.
1 to 3 show two-pole examples.
Side covers 1a, 1b on both sides and center partition wall 1
A housing 2 is composed of the side cover 1 and the side cover 1.
A circuit breaking mechanism including an operator 3, a movable contact 6, etc. is housed between recesses on both sides of the center partition wall 1c and the center partition wall 1c. The operator 3 of the circuit breaking mechanism has shafts 4 integrally protruding from both sides of the central portion. The movable contactor 6 has a movable contact 7 fixed to the lower surface of an extension piece 6a extending laterally from the lower surface of one end, and latch pins 8 protruding from both side surfaces of the other end. The operator 3 and the movable contact 6 are connected by a spring link 11 made of a torsion spring. That is, at both ends of the spring link 11 there are connecting legs 11a and 11b that are bent and extended at right angles, and these connecting legs 11
a, 11b narrow plate-shaped metal fittings 9 for regulating expansion
A hole 12 is inserted into the elongated hole 10 and one connecting leg 11a is drilled in the lower end side surface of the middle part of the movable contact 6.
The movable contact 6 and the operator 3 are connected by inserting the other connecting leg 11b into a hole 13 bored in one end of the operator 3. Hole 12 of movable contact 6
One end of a tension spring 14 made of a coil spring is locked to a locking piece 6b extending laterally from the lower end of the movable contact 6 between the position and the movable contact 7. This tension spring 14 is locked to a locking portion 3a provided on the lower surface between the other end of the operator 3 and the shaft 4, and serves as an opening spring and a handle return spring. At this time, a Z-shaped bent portion 6c formed at the center of the movable contactor 6 is used as a relief for the center of the tension spring 14. Thus, the movable contactor 6, the operator 3, the spring link 11, the tension spring 14, and the plate-like metal fitting 9
The block is constructed by inserting the shaft 4 of the operator 3 into the shaft hole 5 provided in the recess of the side cover 1a or 1b and the central partition wall 1c, and attaching the operator 3 to the housing 2.
The latch pin 8 is disposed in the housing 2 with the latch pin 8 engaged with the arcuate guide groove 28 provided in the recess of the side cover 1a or 1b and the central partition wall 1c. On the other hand, a plug-in type fixed terminal board 15 having a fixed contact 16 that contacts and separates from the movable contact 7 is bent at the middle part into a Z shape, and is provided in the recess of the side covers 1a, 1b and the central partition wall 1c. Fit the piece 15a above the bending part into the groove 18 of the protruding part 17 and position it,
The central bent horizontal piece 15b is attached to the side cover 1a.
Or placed on the inner bottom of the recess of the central partition wall 1c,
The protruding pieces 15d protruding from both ends of the upper part of the piece 15c protruding outward from the lower bottom opening are fixed by coming into contact with the lower part of the side cover 1a or the central partition wall 1c.

Now, the latch plate 23 which engages and disengages the latch pin 8 has a shaft 25 inserted through an insertion hole 23a penetrating the side surface of the intermediate portion, and both ends of the shaft 25 are connected to the side cover 1a or 1b and the central partition wall 1c. The latch locking piece 24 for engaging the latch pin 8 is provided on one surface below the insertion hole 23a, and the wide part at the upper end A biasing spring 26 is installed between one surface and a spring seat provided on the side cover 1a or 1b and the central partition wall 1c, and is constantly biased to rotate counterclockwise in the drawing. Sho axis 25
A collar 25a provided on the shaft 25 is provided to make the shaft 25 stable and self-supporting.

Next, the tripping mechanism will be explained. In this embodiment, the tripping mechanism includes an overcurrent detection device A and an electromagnet device B operated by an external signal voltage. The overcurrent detection device A is composed of a bimetal plate 20, and the bimetal plate 20 is supported and fixed by a terminal 19 connected to an external circuit. In other words, the plug-in terminal 19 is integrally formed by bending the support base 19a from the upper end side, and the adjustment screw 2 is attached to the center of the lower piece of the support base 19a whose side ends are connected to the upper end side.
A hole is provided at the lower end of the bimetal plate 20 with a protrusion 19b provided on a hanging piece 19d extending downwardly from the side surface of the upper piece whose tip is inclined slightly upward. The bimetal plate 20 is fixedly supported by inserting it into the protrusion 20a and caulking the tip of the protrusion 19b. Then, screw the adjusting screw 21 into the screw hole 19c and
1 is brought into contact with the lower surface of the upper piece of the support base 19a of the terminal 19. Therefore, the terminal 19 is attached to the support base 19a.
The center piece is fitted into the fixing groove 22 provided in the recess of the side cover 1a or the center partition wall 1c to be fixed. At this time, the upper end of the bimetal plate 20 is opposed to the wide upper end of the latch plate 23.
Further, the head of the adjustment screw 21 faces a jig insertion hole 22a bored at the bottom of the recess in the side cover 1a or the central partition wall 1c so as not to protrude outside the housing 2, and the head of the adjustment screw 21 faces the jig insertion hole 22a bored at the bottom of the recess in the side cover 1a or the central partition wall 1c so as not to protrude out of the housing 2. When the adjusting screw 21 is screwed upward, the upper end of the adjusting screw 21 pushes up and deforms the upper piece of the support base 19a, and moves the tip of the upper piece upward using the base as a fulcrum, thereby separating the bimetal plate 20 and the upper end. The distance between the latch plate 23 and the wide portion, that is, the magnitude of the detected current can be set. Here, the jig insertion hole 22a is located on the side of the terminal 19 that projects outside, so it is hidden when the terminal 19 is connected to a receptacle or the like.
Therefore, there is no need for a cover or the like to hide the adjustment screw 21, and adjustment can be made after the assembly is completed. Incidentally, the bimetal plate 20 is electrically connected to the movable contactor 6 by a knitted wire L.

The interlocking body 30 that interlocks and trips the two-pole circuit breaking mechanism is located in the opening 29 formed in the lower part of the central partition wall 1c, and is located in the shaft hole 32 provided in the recess of the central partition wall 1c and the hole 30a of the interlocking body 30. It is rotatably attached by a shaft 31 that passes through it. Interlocking body 3
0 is formed with two triangular trip drive pieces 33, which are located on both sides of the center partition wall 1c with the center partition wall 1c as a boundary, and further contact one surface of the lower part of each latch plate 23. It is located like this.

Next, the electromagnet device B for remote control tripping will be explained. In the electromagnet device B, an iron core 51 is inserted into the center of a coil frame 49 around which a coil 50 is wound, and a movable iron piece 52 and a yoke 53 are attracted to the iron core 51.
are placed on the top and side surfaces of the coil frame 49, and a yoke 53 is placed in the notch 52a on both sides of the movable iron piece 52.
The movable iron piece 52 is rotatably supported at the tip of the horizontal piece of the yoke 53 by inserting a protrusion 53a into the tip side of the horizontal piece, and is biased by a spring 56 to the side opposite to the iron core 51 side. and coil 50
The control terminal 54 is a plug-in type control terminal connected to the lead wire l of the control terminal. Fitting grooves 49b are opened inwardly in the width direction at the lower ends of both side flanges 49a of the coil frame 49, and the end faces are also open.
are provided, and both side ends of a horizontal flat piece 54a bent and formed at the upper end of the control terminal 54 are slidably fitted and fixed in this fitting groove 49b, and the lead wire l of the coil 50 is fixed to the control terminal 54. It is wrapped around a raised protrusion 54b provided at the end of the horizontal flat piece 54a and soldered, and is fixed by being sandwiched between the collar 49a of the coil frame 49 and the horizontal flat piece 54a of the control terminal 54, as shown in FIG. be done. The electromagnetic block is housed in the case 48 by inserting the control terminal 54 from above into the insertion hole 55 bored in the bottom of the case 48, which has an open top, and penetrating the case 48 downward. The flange 48a around the upper end of the case 48 is slidably inserted into the grooves 57 of the central partition wall 1c and the side covers 1a, 1b, so that the case 48, that is, the electromagnet device B, is fixed to the housing 2. here,
The trip drive horizontal piece 59 of the interlocking body 30 is placed above the push-up piece 58 of the movable iron piece 52.

Now, the side covers 1a, 1b made of synthetic resin and the central partition wall 1c are connected by heat welding at the tips of the pins 36, which are integrally protruded from the central partition wall 1c, by inserting them into the mounting holes 37 of the side covers 1a, 1b. The above-mentioned opening/closing mechanism, overcurrent detection device A, electromagnet device B, fixed terminal board 15, and terminal 1 are assembled by
9 is housed and fixed in the housing 2. Mounting plate 3 is inserted from the upper surface of housing 2 assembled in this way.
4 is covered, and a bifurcated mounting piece 38 extending from both sides of the mounting plate 34 is fitted between protrusions 39 formed on the side surfaces of the side covers 1a and 1b.
The mounting plate 34 is fixed to the housing 2 by spreading the tips of the mounting plates 8 outward as shown in FIG. The mounting plate 34 has a fixing hole 40 formed at its end, and is fixed to a device case or the like through the fixing hole 40. Further, a positioning hole 41 is opened in the center of the mounting plate 34, and engages with a protrusion 42 formed on the upper surface when the housing 2, that is, the side covers 1a, 1b and the central partition wall 1c are assembled. Triangular handle attachment pieces 43 are provided on both sides of the positioning hole 41.
is bent upward, and this handle attachment piece 43
An operating handle 35 is attached to the. In other words,
The shaft protrusions 44 on both sides of the operating handle 35 are pivotally supported in the shaft support holes 45 of the handle mounting piece 43, and the operating handle 35 is swingably attached to the mounting piece 34. Further, a pivot piece 46 is integrally hung from the lower surface of the operating handle 35 as shown in FIG.
A notch 47 is formed in 6. This notch 47 is connected to the connecting shaft 3b of the operating element 3, and transmits the operating force of the operating handle 35 to the operating element 3.

In the above embodiment, the operation element 3 and the operation handle 35 are
However, one end of the operator 3 may be extended to serve as a handle.

Next, the operation of the embodiment will be specifically explained.
4 to 6 are sectional views showing the operation. FIG. 4 shows the operation handle 35 set to the OFF side and the movable contact 7 is turned off, and FIG. 5 shows the operation handle 35 set to the ON side. When set and the movable contact 7 is latched on, FIG. 6 shows the case where an overcurrent is detected or a trip operation is performed by remote control. Now, when the operating handle 35 is set from OFF to ON, the operating element 3 rotates about the shaft 4,
This rotational force is transmitted to the movable contact 6 via the spring link 11, and the movable contact 6 is rotated about the latch pin 8 engaged with the latch locking piece 24 of the latch plate 23, and the movable contact 7 comes into elastic contact with the fixed contact 16, and the movable contact 7 is turned on. At this time, there is a dead center in the link mechanism using the spring link 11, so that a reliable reversal operation is performed, and the contact pressure of the movable contact 7 is dependent on the elastic force of the spring link 11. It's becoming more and more accessible. That is, in the on state shown in FIG. 5, the spring link 11 is in a slightly compressed state, and an elastic force corresponding to the compressed amount is applied to the movable contact 7 as contact pressure. It's getting old. At the same time, the tension spring 14 is stretched and the trip driving force is charged.

Next, when at least one pole of the bimetal plate 20 of the overcurrent detection device A is bent inward and the upper end of the latch plate 23 is pressed inward, the latch plate 23 is unlatched, as shown in FIG. The locking piece 24 and the latch pin 8 of the movable contact 6 are disengaged, and the movable contact 6
is rotated about the engagement point of the spring link 11 by the restoring force of the tension spring 14, and the movable contact 7 is opened. At this time, the latch pin 8 protruding from the movable contact 6 moves down along the guide groove 28, presses one trip drive piece 33 located on the trajectory of the latch pin 8, and rotates the interlocking body 30. make it move. When this interlocking body 30 is rotated, the latch plate 23 of the other shutoff mechanism is rotated by the other trip drive piece 33, and the movable contact 7 of the movable contactor 6 is forcibly opened. Become.

Further, if it is desired to turn off the on state shown in FIG. 5 by remote control, a control signal voltage may be applied to the control terminal 54 of the electromagnetic device B. In other words, when a signal voltage is applied and the iron core 51 is excited, the movable iron piece 52
is attracted, and at that time, the push-up piece 58 pushes up the trip drive horizontal piece 59 of the interlocking body 30 to rotate the interlocking body 30. This rotation of the interlocking body 30 causes the latch plate 2 to
3 to open the pole in the same manner as above. Of course, it is sufficient to manually operate the on/off operation handle 35.

By the way, there is a risk that the upper part of one end of the movable contactor 6 may hit the wall surface of the housing 2 and scrape the housing 2, which is a molded part, during the above-mentioned opening. This is prevented by the piece 60.

Further, marks 61a and 61b indicating on and off are respectively written on the top surface of the operation handle 35.
The above-mentioned on and off states can be indicated.

[Effects of the Invention] As described above, the present invention has a central partition wall having outwardly opening recesses on both left and right sides, and two side covers each covering each recess of the central partition wall. A movable contact which forms a housing having cut-off mechanism storage parts on the left and right sides, and which is provided with a movable contact that comes into contact with and separates from a fixed contact, and a latch locking piece that locks a latch pin protruding from one end of the movable contact. a latch plate rotatably supported by a latch plate, and a latch plate is engaged with one end of the latch plate to rotate the latch plate in a direction to release the lock between the latch pin and the latch locking piece when an overcurrent flows. A circuit interrupting mechanism consisting of an overcurrent detection means and a handle means for manual operation is housed in the above-mentioned interrupting mechanism housing, and is located on the locus of movement of the latch pin that is pushed by the latch pin when the latch is released. The center part of the interlocking body, which has trip drive pieces at both ends that push the latch plate in the unlocking direction when the latch plate is activated, is rotatably supported on the central bulkhead, so that the latch of one circuit breaker mechanism cannot be unlatched. When the plate is tripped by the function of the overcurrent detection means, the latch plate of the other circuit breaker mechanism can be surely tripped, and the latch load is reduced so that the tripping operation of both circuit breaker mechanisms can be performed reliably and stably without variation. This has the effect of improving reliability, and since the interlocking body is pivoted to the central bulkhead and integrated with the members that make up the housing, assembly is easy and it can be driven by external control signals. Since the remote controlled release electromagnetic device is attached to the housing below the interlocking body and the trip driving piece rotates the interlocking body in the direction in which the latch plate is pushed in the unlocking direction, the handle means is used. In addition to manual operation and overcurrent tripping operation, remote control tripping is possible, and the structure is simple because the interlocking structure between the electromagnetic device and the circuit breaker mechanism can be achieved by simply linking the electromagnet device with the interlocking body. This has the advantage that an electromagnetic device for remote control tripping can be easily added.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2 is an exploded perspective view of the main parts of the same, Fig. 3 is an external perspective view of the same, and Figs. 4 to 6 are explanatory diagrams of the operation of the same. be. 1a and 1b are side covers, 1c is a central partition wall, 2
is a housing, 6 is a movable contact, 7 is a movable contact,
8 is a latch pin, 16 is a fixed contact, 23 is a latch plate, 24 is a latch locking piece, 26 is an interlocking body, 33 is a trip drive piece, 35 is an operating handle, A is an overcurrent detection device, and B is an electromagnet device. .

Claims (1)

[Claims] 1. A housing having cut-off mechanism housings on the left and right sides is formed by a central partition wall having outwardly opening recesses on both left and right sides, and two side covers each covering each recess of the central partition wall. , a movable contact provided with a movable contact that comes into contact with and separates from a fixed contact, and a latch that is rotatably supported and includes a latch locking piece that locks a latch pin protruding from one end of the movable contact. a plate, and overcurrent detection means that engages with one end of the latch plate and rotates the latch plate in a direction to release the lock between the latch pin and the latch locking piece when an overcurrent flows;
A circuit breaking mechanism consisting of a handle means for manually opening and closing the movable contact is housed in the breaking mechanism storage portion, and is positioned on the locus of movement of the latch pin that is pushed by the latch pin when the latch is released. The center part of the interlocking body, which has trip drive pieces at both ends that push the latch plate in the unlocking direction when the latch plate is moved, is rotatably supported on the central bulkhead, and is driven by an external control signal to drive the trip. 1. A switch device comprising an electromagnetic device for remote operation tripping, which rotates the interlocking body in a direction in which the piece pushes the latch plate in the unlocking direction, and is attached to a housing below the interlocking body.