JPS6129033A - Multipolar circuit breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a multi-pole circuit breaker that is provided with an opening/closing mechanism for each of the multiple poles and an electromagnetic tripping element for interrupting the mechanism.

[The amount of invention]

When a multi-pole circuit breaker is constructed by connecting multiple single-pole circuit breakers equipped with electromagnetic tripping elements, the switching mechanism of the remaining poles is shut off in conjunction with the interrupting operation of the switching mechanism of one pole. It is necessary to provide an interlocking mechanism for operation.

The interlocking mechanism of conventional multi-pole circuit breakers is as follows:
For example, as shown in Japanese Utility Model Publication No. 50-86680, a multi-pole movable contact is provided, an interlocking member common to each pole is provided above the nine-swivel arm, and an electromagnetic tripping element is provided above the interlocking member. An armature that is a part is provided, and the interlocking member and the
The two armatures are arranged so that they are displaced in the same direction, and when the opening/closing mechanism of one of the poles is cut off, the rotating arm connected to the opening/closing mechanism springs up to cause the interlocking member to move in the same direction. There is also a device in which the armature is launched using this interlocking member, and the rest of the opening/closing mechanism is shut off.

However, in this configuration, the armature of the electromagnetic tripping element is launched by the flip-up of the rotating arm during the interrupting operation through the interlocking member, and the armature is moved 10 degrees in the direction in which the armature is attracted to the magnetic pole.
In order to move the armature, if the lifting distance of the rotating arm is increased, the armature is designed to absorb the overstroke, and when the armature hits the magnetic pole and stops, it is deformed by the impact force, causing In addition, if the overstroke of the rotating arm is not sufficient, it may cause a malfunction due to differences in the consumption period of various contacts or dimensional errors of parts, etc.
When a pole is cut off, it may not be possible to reliably interlock the remaining poles with the cut-off action.

In another example of the interlocking mechanism shown in Japanese Utility Model Publication No. 50-86680, the interlocking member launched by a rotating arm during the cutoff operation of a single-pole opening/closing mechanism further launches another U-shaped arm to rotate. The other end of this U-shaped arm strikes a tripping member provided on the opening/closing mechanism to shut off the opening/closing mechanism of the remaining camellias, but this increases the number of parts in the interlocking mechanism and complicates the configuration. There is a drawback.

[Purpose of the invention]

An object of the present invention is to provide l
A multi-pole circuit that allows the opening/closing mechanism of the remaining poles to interlock and shut off when the opening/closing mechanism of one pole is cut off, and that there is no risk of parts deforming and malfunctioning due to overstroke of the rotating arm. Our goal is to provide circuit breakers.

[Summary of the invention]

The present invention has a rotating arm provided with a movable contact, an opening/closing mechanism coupled to this rotating arm, and an electromagnetic tripping element for interrupting this opening/closing mechanism, and each has a single pole. In a multi-pole circuit breaker equipped with an interlocking mechanism that cuts off the opening/closing mechanisms of the remaining poles in conjunction with the breaking operation of the opening/closing mechanism of the above-mentioned circuit breaker, the above-mentioned interlocking mechanism is configured such that the above-mentioned rotating arm or It consists of an interlocking member that rotates when pushed by the movable part of the opening/closing mechanism, and the tripping member provided in the opening/closing mechanism has a part pressed by the electromagnetic tripping element and a part pressed by the interlocking member. It is characterized in that it is provided with a separate opening/closing mechanism and is configured to be directly pressed and rotated by the interlocking member independently of the electromagnetic tripping element to shut off the remaining opening/closing mechanism.

[Embodiments of the invention]

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

FIG. 1 shows one pole of a multi-pole circuit breaker, and the other poles are similarly constructed. In the closed state of the circuit breaker, as shown in FIG.
extends and pushes down the rotating arm 5 on which the movable contact 4 is provided, and the movable contact 4 is in contact with the fixed contact 8. At this time, the circuit current flows from the terminal 1 to the fixed contact 3, the movable contact 4, and the rotating arm. 5, flows to the terminal 2 via the lead wire 9 and the trip coil 11 of the electromagnetic tripping element IO. When an overcurrent flows in the circuit, the armature 12 of the electromagnetic tripping element 10 is pulled by the magnetic pole 13, and the trip lever 14, which is a tripping member provided on the lower link 8 of the opening/closing mechanism 6, is pulled by the armature 12. By being pressed by and rotating in the opening direction, the engagement between the trip shaft 15 and the upper link 7 is disengaged, and due to the action of an unillustrated cutoff spring, the glu link 7.8 is displaced as shown by the broken line. Then, the rotating arm 5 springs up and the movable contact 4 is separated from the fixed contact 3. Contact point 8-4 above
can be opened and closed by manual operation of a nozzle 16 connected to the upper link 7.

In this embodiment, in order to operate the opening/closing mechanism 6 in conjunction with each pole to perform a shutoff operation, an interlocking lever 17 and an interlocking rod 18, which are interlocking members common to each pole, are provided. The trip lever 14 and the interlocking lever 17 are formed as shown in FIGS. 2 and 8, respectively.

The trip lever 14 is separately provided with a portion 14a pressed by the armature 12 and a portion 14b pressed by the interlocking lever 17.
7 is pivotally supported by a pin 19 on a fixed frame (not shown), and each pole rotates simultaneously via an interlocking rod 18. The rotating arm 5, the trip lever 14, and the interlocking lever 17 are arranged so that the interlocking lever 1 is placed above the pin 20 protruding from the rotating arm 5.
The distal end 17a of the trip lever 14 is located above the distal end 17a, and the portion 14b of the trip lever 14 that is pressed by the interlocking lever 17 is located above the distal end 17a.

As shown in FIGS. 4 and 5, for example, when two single-pole circuit breakers A and B constituting a two-pole circuit breaker are interlocked, single-pole circuit breaker A is shown in FIG. Electromagnetic trip element 1
0, and when the rotating arm 5 springs up, it is pressed by the pin 20 protruding from the rotating arm 5, and the various interlocking levers 17 rotate in the open direction via the interlocking rod 18. , the trip lever 14 of the single-pole circuit breaker B in the closed state is pressed by the tip 17a of the interlocking lever 17 and rotates clockwise in the same way as when the electromagnetic tripping element 10 performs the breaking operation. The opening/closing mechanism 6 of the circuit breaker B also performs a breaking operation, and the rotating arm 5 springs up to separate the movable contact 4 from the fixed contact 8.

FIG. 6 shows the state after separation. In this embodiment, the trip lever 14 has a portion 14a pressed by the armature 12 and a portion 14b pressed by the interlocking lever 17, which are separately provided. lI46
The breaking operation is carried out completely independently of the armature 12.

In addition, as shown in Fig. 6, after opening, the trip lever 1
4 also moves upward together with the lower link 8, and the rotating arm 5
is separated from the interlocking lever 17 that is engaged with the pin 20 of.

Therefore, there is no risk that parts such as the armature 12 and the trip lever 14 will be deformed by the impact force from the interlocking lever 17 due to the overstroke of the rotating arm 50, thereby causing malfunction. In addition, by providing a sufficient overstroke of the rotating arm 5, the various opening/closing mechanisms can be reliably interlocked and cut off even if the amount of wear of various contacts is different or there are dimensional errors in parts. can. Furthermore, since the trip lever 14 is configured to be rotated by being directly pressed by the movement lever 17, the interlocking mechanism can be easily constructed with a minimum number of parts.

Next, a second embodiment of the present invention will be described with reference to FIGS. 7 to 9.

In this embodiment, the trip lever 14 in the first embodiment is modified, and the positions of the portion 24a of the trip lever 24 pressed by the armature 12 and the portion 24b pressed by the interlocking lever 27 are reversed. As shown in FIG. 9, when one pole A is cut off, the pin 20 protruding from the rotating arm 5 lifts up the interlocking lever 27, so that the interlocking lever of the other pole B connected via the interlocking rod 28 is activated. 27 presses the trip lever 14 and rotates it clockwise to shut off the opening/closing mechanism 6 of the other QBs, which is the same as in the first embodiment, and has the same effect as the first embodiment.

Next, an eighth embodiment of the present invention will be described with reference to FIGS. 10 to 18.

In this embodiment, as shown in FIGS. 10 and 13,
Trip levers 84, which are tripping members, are provided on both sides of the lower link 8 of the opening/closing mechanism 6, and pins 20 of the rotating arm 5 are also provided protruding from both sides, and the interlocking members are made of an insulating material such as synthetic resin. As shown in FIG. 11, an interlocking lever 87 having protruding portions 87a and 87b on both sides and a pin hole or protrusion 39 serving as a pivot point is used, and this interlocking lever 87 is arranged so as to straddle adjacent poles. and is pivoted to a fixed frame (not shown) so as to be rotatable around a pin hole or protrusion 89. Trip lever 84
Similarly to the trip lever 24 of the second embodiment, a portion 84a pressed by the armature 12 and a portion 84b pressed by the interlocking lever 37 are separately provided.

For example, as shown in FIG. 12, one protruding portion 87a of the interlocking lever 37 is lifted up by the pin 20 of the rotating arm 5 during a 1iA cutoff operation, so that the interlocking lever 37
rotates clockwise around the pin hole or protrusion 39. At this time, the other protruding portion 87b of the interlocking lever 37
presses the trip lever 34 of the other pole B and rotates it clockwise, causing the opening/closing mechanism 6 of the other pole B to perform a blocking operation.

In addition to having the same effects as the first and second embodiments, this embodiment also interlocks adjacent poles with each other via the interlocking lever 87, so that any number of interlocking poles can be shut off using the same parts. It has the unique effect of being possible.

FIG. 14 is an external view of a single-pole circuit breaker used in the first to eighth embodiments, and FIG. 15 is an external view of a multi-polar circuit breaker of each embodiment, showing the case of eight poles. In Figures 14 and 15,
21 is a case, 22 is a cover, 23 is a connecting fitting, 25 is a caulking pin, 26 is a handle connecting shaft, and 80 is a collar.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 16 to 22.

In this embodiment, a trip lever 44 and a common tripping rod 48 as shown in FIGS. 17 and 18 are used to operate the opening/closing mechanism 6 in conjunction with multiple poles to perform a blocking operation. The trip lever 44, which is a tripping member, has a portion 44a pressed by the armature 12 of the electromagnetic tripping element 10 and a portion 44b pressed by the common tripping rod 48, and is used for various opening/closing mechanisms 6. One each is provided. The common trip rod 48, which is an interlocking member, has two protrusions 48a and 48 for each type.
b, one of which protrusions 48a engages with the rear end 5a of the rotating arm 5, and the other protrusion 48b engages with the trip lever 4.
4 is arranged to engage with the corresponding portion 44b of No. 4.

For example, as shown in FIG. 21, when the pole A performs a blocking operation, one protrusion 48a of the common tripping rod 48 engaged with the rear end 5a of the rotating arm 5 causes the rotating arm 5 to snap off. The common trip rod 48 rotates counterclockwise as it is pressed by the upward movement. At this time, the trip lever 44 of the other pole B
The other protrusion 48b of the common trip rod 48 is engaged with the
Press the trip lever 44 and rotate it clockwise,
The opening/closing mechanism 6 of the other pole B is operated to shut off.

In this embodiment as well, the interrupting operation by the common trip rod 48 is performed completely independently of the armature 12, and after opening, the trip lever 44 moves upward as shown in FIG. Since the rod 48 is separated from the rod 48 1, there is no risk that the armature 12 or the trip lever 44 will be deformed by the impact force caused by the overstroke of the rotary arm 5, and the overstroke of the rotary arm 5 can be taken sufficiently. Pole interlocking shutoff can be performed reliably.

Furthermore, according to this embodiment, as shown in FIG. 20, the common trip rod 48 can be assembled into a product simply by supporting both ends with the case 21 or the like, making assembly easy.

In the first to fourth embodiments described above, the interlocking member rotates by being pressed by the rotating arm provided with the movable contact during the interruption operation, so the interlocking member rotates even during normal manual opening/closing operations as in the conventional example. It is easy to operate and parts are subject to wear and tear. In order to eliminate such unnecessary movement of the interlocking member, the interlocking member may be operated by utilizing the displacement of the movable portion of the opening/closing mechanism during tripping.

In the fifth embodiment of the present invention shown in FIGS. 28 to 27, an interlocking lever 57, which is an interlocking member, is pivotally supported by a fixed frame (not shown) so as to be rotatable about a pin 59, and is supported by a spring (not shown). The stopper prevents the rotary arm 5 provided with the movable contact 4 and the lower link 8 which is the movable part of the opening/closing mechanism 6 during the normal closed circuit state shown in FIG. 28 and the manual shutoff operation shown in FIG. 25. It is held in a position where it does not engage with either of the two.

The trip lever 54, which is a tripping member, has a portion 54a pressed by the armature 12 of the electromagnetic tripping element, and a portion 54b pressed by the interlocking lever 57. By being pressed by and rotating counterclockwise, the trip shaft 15
and upper link 7. This connection is removed, and toggle link 7.8
is displaced as shown in FIG. 26, and the rotating arm 5 is operated to open. After opening, the handle 16 moves to the trip position indicated by the chain line 16', and the lower link 8 tilts to the position indicated by the chain line 8'. At this time, the tip 57a of the interlock lever 57 is pressed by the lower link 8, and the interlock lever 57
rotates clockwise around pin 59. This rotation of the interlocking lever 57 causes the interlocking lever 57 of the other pole connected via the interlocking rod 58 to rotate as shown in FIG.
The J-tup lever 54 is pressed and rotated counterclockwise, so that the opening/closing mechanism 6 of the other pole is also cut off, and the movable contact 4 is opened and opened as shown by the broken line 4'.

This interrupting operation by the interlocking lever 57 is performed independently of the armature 12, and after opening, the trip lever 54 also separates from the interlocking lever 57, as shown in FIG.

Therefore, the same effects as in the first embodiment can be obtained in this embodiment as well. Furthermore, according to this embodiment, the interlocking lever 5
7. The interlocking rod 58 operates only when tripped due to overcurrent.
Since it does not operate with normal manual opening/closing operations, the durability and reliability of the parts are improved, and new functions such as the ability to selectively insert and connect various parts at the same time, which was not possible with the conventional structure, were realized. I can do it.

〔Effect of the invention〕

According to the present invention, when the opening/closing mechanism of one pole is cut off, the electromagnetic tripping element is connected by the interlocking member that is pressed and rotated by the rotating arm provided with the movable contact or the movable part of the opening/closing mechanism. Because it is configured to directly press the drag member of the opening/closing mechanism without using the pole to shut off the remaining opening/closing mechanism, parts such as the armature receive impact force due to the overstroke of the rotating arm. In addition to avoiding deformation and malfunction, the overstroke of the above-mentioned rotating arm is sufficient, so even if there are differences in the wear amount of multi-pole contacts or dimensional errors of parts, multi-pole interlocking disconnection is ensured. The interlocking mechanism can be easily constructed using a minimum number of parts.

[Brief explanation of drawings]

FIG. 1 is a front view showing a closed circuit state of the first embodiment of the present invention;
Figures 2 (a) and (b) are front and side views of the trip lever in Figure 1, Figure 3 is a plan view of the interlocking lever in Figure 1, and Figure 4 is the interlocking of the first embodiment. 5 is a side view of the mechanism, FIG. 6 is a diagram showing the trip state of the first embodiment, and FIG. 7 is a diagram showing the closed circuit state of the second embodiment of the present invention. Figures 8(a) and (bl are front and side views of the trip lever in Figure 7, Figure 9 is a diagram showing the operating state of the interlocking mechanism of the second embodiment, and Figure 1θ is a diagram of the present invention. A front view showing the closed circuit state of the eighth embodiment, FIGS. 11(a) and 11(b),
(c) is a front view, top view, and side view of the interlocking lever in Fig. 10, Fig. 12 is a diagram showing the operating state of the interlocking mechanism of the eighth embodiment, Fig. 18 is a plan view of the same, Fig. 14 is a perspective view of a single-pole circuit breaker, FIG. 15 is a perspective view of a multi-pole circuit breaker having an interlocking mechanism, FIG. 16 is a front view showing the closed circuit state of the fourth embodiment of the present invention, and FIG. 17 ( , ), (b) are the front and side views of the trip lever in Fig. 16, and Fig. 18 (,
), (b) are a front view and a side view of the common trip rod in FIG. 16, FIG. 19 is a front view showing the trip state of the fourth embodiment, FIG. 20 is a side view of the same, and FIG. A diagram showing the operating state of the interlocking mechanism of the fourth embodiment, FIG. 22 is a plan view thereof, and FIG. 23 is a front view showing the closed circuit state of the fifth embodiment of the present invention.
24(a) and 24(b) are a plan view and a front view of the interlocking lever in FIG. 28, FIG. 25 is a front view showing the open state by manual operation of the fifth embodiment, and FIG. 26 is a front view of the fifth embodiment. FIG. 27 is a front view showing the trip state of the embodiment, and FIG. 27 is a front view showing the operating state of the interlocking mechanism of the fifth embodiment. 4: Movable contact, 5: Rotating arm, 6: Opening/closing mechanism, 8: Movable part of the opening/closing mechanism, 10: Electromagnetic tripping element, 14.2
4.84.44.54: Tripping member, 14a. 24a, 84a, 44a, 54a: Portion pressed by electromagnetic tripping element, 14b, 24b, 8
4b, 44b, 54b. : Part pressed by interlocking member, 17.18.27.
28.87.48.5? , 58: Interlocking member. Figure 1 $2 Figure (and b $14 Diagram] 1 No. 5121 Rin/6 Kano 17 Diagram (of (1)) No. /'7 Kuchine 21 Mouth No. 22 2 No. 23 No. 26 Ward No. 27 Procedural Amendment (Method) Case Display Showa 1959 Patent Application No. 147518 Name of the Invention Incident involving a person who corrects a multi-pole circuit breaker 1 Related Patent Applicant Name Name
□51) Manufactured by Tate Kuchi Co., Ltd.
Object drawing of person 1

Claims (1)

[Claims] Each pole is provided with a rotating arm provided with a movable contact, an opening/closing mechanism coupled to this rotating arm, and an electromagnetic tripping element for interrupting this opening/closing mechanism, and the opening/closing mechanism of any one pole is provided with In a multi-pole circuit breaker equipped with an interlocking mechanism that interrupts the opening/closing mechanism of the remaining poles in conjunction with the interrupting operation, the interlocking mechanism is configured to move the rotating arm or the opening/closing mechanism during the interruption operation of the opening/closing mechanism of each pole. The tripping member provided in the opening/closing mechanism separates the portion pressed by the electromagnetic tripping element and the portion pressed by the interlocking member. A multi-pole circuit breaker, characterized in that the multi-pole circuit breaker is configured to be directly pressed and rotated by the interlocking member independently of the electromagnetic tripping element, thereby causing the remaining opening/closing mechanism to operate to shut off.