JP3246568B2 - Multi-pole circuit breaker display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-pole circuit breaker comprising a plurality of single-pole circuit breakers connected adjacent to each other, and more particularly to a device for displaying the operation state of the circuit breaker.

[0002]

2. Description of the Related Art When a multi-pole circuit breaker is constructed by connecting a plurality of single-pole circuit breakers, a handle for each pole is used to simultaneously operate the operation handles of the single-pole circuit breakers. It is known that a connecting tool is attached by straddling (refer to Japanese Utility Model Laid-Open No. 59-173247, Japanese Patent Laid-Open No. 3-8230, etc.). In addition, as a means to indicate the operating state (ON, OFF, and trip states) of the circuit breaker, the ON / OFF is generally given a character or color on the surface of the operation handle that looks through the handle hole of the case. Thus, the determination is made based on the position of the handle handle that moves between the ON position and the OFF position. The display method of such an operation state is the same in the above multi-pole circuit breaker.

[0003]

However, the multi-pole circuit breaker in which the operation handle of each pole is provided with an on / off display has a poor appearance because the same display can be seen for each operation handle of each pole. However, there is a problem that the display is small and difficult to see because there is only a handle space, and that the on / off printing for each pole and the attachment of a nameplate increase the cost. Also, the trip is determined from the position of the steering wheel, so that it is confusing with the off display and the display is unclear.

On the other hand, an opening / closing mechanism is accommodated in an insulating container consisting of a left and right case and a cover, and an operating handle for operating the opening / closing mechanism is protruded from a handle hole opened across the mating surface of the case and the cover. In the case of forming a multi-pole circuit breaker by connecting a plurality of single-pole circuit breakers, the middle of a shape in which a cover and a case that should be back-to-back between two adjacent single-pole circuit breakers are integrated. It is known that a plurality of sets of insulating containers for single-pole circuit breakers are formed adjacent to each other by providing a case and combining a pair of a case and a cover on both sides of one or a plurality of the intermediate cases connected to each other. I have. The present invention relates to a multi-pole circuit breaker comprising a plurality of single-pole circuit breakers constituted by using the intermediate case, wherein a display device of the multi-pole circuit breaker which makes it easy to see an on / off display and also enables a trip display. The purpose is to provide.

[0005]

According to the present invention, an opening / closing mechanism is accommodated in an insulated container consisting of a case and a cover which are divided into two parts, and the case and the cover are combined. When a multi-pole circuit breaker is formed by connecting a plurality of single-pole circuit breakers in which an operation handle for operating the opening / closing mechanism protrudes from a handle hole opened across a surface, two adjacent single-pole circuit breakers are provided. The cover and the case that should be back to back of the container are integrated, and an intermediate case with a handle hole penetrating left and right is provided,
By combining a pair of cases and covers on both sides of one or more of the intermediate cases connected to each other, a plurality of sets of insulating containers for a single-pole circuit breaker are formed adjacent to each other, and each of the insulating containers is constituted by these insulating containers. A common operating handle for connecting these to the respective handle levers of the single pole circuit breaker is mounted so as to cover the handle holes of the case, the intermediate case and the cover, and a display indicating an on / off state is provided on the surface thereof. Shall be. In the above multi-pole circuit breaker, a display indicating the trip state is provided at one end of the operation handle, and a display window is provided on the cover so that the display can be viewed.

[0006]

[Function] Although the problem of displaying on / off for each operating handle of each pole has already been described, as a countermeasure, even if the on / off display is performed on the connecting tool for simultaneously operating the operating handle, the conventional connecting tool is not used. It is always outside the case just by covering the handle, and the display surface cannot be switched. Therefore, in the present invention, the operating lever is integrated into each pole, and the operating lever is attached to the handle lever of each pole so as to cover the handle hole of the intermediate case penetrating right and left and the handle holes of the case and the cover on both sides thereof. The on / off display is performed on the surface viewed through the handle hole of the handle lever. As a result, it is possible to collectively display ON / OFF as a multi-pole circuit breaker in a large display space. Further, if a trip display is provided at one end of the operation handle, and this is viewed through a display window opened in the cover, it is possible to clearly display the trip as on / off.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is an exploded perspective view of a main part of an embodiment of a two-pole circuit breaker, FIG. 2 is a front view of an ON state of the circuit breaker of FIG. 1, FIG.
5 is a front view of the trip state, FIG. 5 is a partially enlarged sectional view taken along line VV in FIG. 2, FIG. 6 is a partially enlarged sectional view taken along line VI-VI in FIG. 3, and FIG. FIG. 8 is a partially enlarged sectional view taken along the line VII, FIG. 8 is a front view of the embodiment of the three-pole circuit breaker in an on state, and FIG. 9 is a front view of the trip state in the same manner.

First, in FIG. 1, a case 2 and a cover 3 are combined on the left and right sides of an intermediate case 1 and fastened together by screws (not shown) to form an insulating container for a two-pole circuit breaker. The case 2 and the cover 3 are paired with each other to form an insulating container for a single-pole circuit breaker, and a handle hole 4 for projecting an operation handle across a mating surface at that time is provided. In the intermediate case 1, a space having substantially the same shape as the cover 3 is formed on the left side of the drawing with the center partition wall 1 a interposed therebetween, and a space having substantially the same shape as the case 2 is formed on the right side. A handle hole 5 having the same width as the handle hole 4 is formed in the intermediate case 1 so as to penetrate left and right. A trip display window 3a is opened on the upper surface of the cover 3.

Therefore, by combining the case 2 with the intermediate case 1, substantially the same insulating container for a single-pole circuit breaker is formed on the left side of the partition wall 1a as when the case 2 and the cover 3 are combined. By combining the cover 3 with the intermediate case 1, an insulating container for a single-pole circuit breaker is formed on the right side of the partition wall 1a. These insulating containers house a switching mechanism and other components to constitute single-pole circuit breakers, respectively.
It is omitted except for the operation handle 7. The handle lever 6 is connected to a mover frame for holding the movable contact by a link (not shown), and is operated to rotate back and forth to open and close the movable contact. As a result, the common operation handle 7 is mounted.

The operating handle 7 has an outer diameter of the handle holes 4,5.
And a handle 7b integrally formed on the upper surface of the connecting portion 7a. The ON nameplate 8 and the OFF nameplate 9 are attached to the front and rear surfaces of the connecting portion 7a.
A trip nameplate 10 is attached to the upper surface of the end on the cover 3 side. ON and OFF characters are written on the ON nameplate 8 and the OFF nameplate 9, respectively, and the trip nameplate 10 is displayed in red. The attachment of the operation handle 7 to the handle lever 6 is performed by press-fitting the projection 7c of the operation handle 7 into a pair of front and rear grooves 6a of the handle lever 6 before attaching the cover 3 to the intermediate case 1. The operation handle 7 mounted on the handle lever 6 closes the handle holes 4 and 5 through an appropriate gap, but both ends enter the inside of the case 2 and the cover 3, and the cover 3 side is tripped in a trip state as described later. 10 faces the trip display window 3a.

In such a configuration, the operation handle 7
Is turned on with the handle 7b, the left and right poles are simultaneously turned on. At this time, as shown in FIG. 2, the ON nameplate 8 can be seen from the handle holes 4 and 5, and the ON state is displayed. Similarly, when the operation handle 7 is turned to the off side, the left and right poles are simultaneously turned off, and the off nameplate 9 is seen from the handle holes 4 and 5 to display the off state as shown in FIG. On the other hand, if the circuit breaker trips in the ON state, the handle lever 6 automatically moves to an intermediate position between the ON position and the OFF position by the action of a cut-off spring (not shown), and the operation handle 7 stops at the position shown in FIG. I do. At that time, the trip nameplate 10 just faces the trip display window 3a and displays the trip state as shown in the figure.

The relationship between the display and the rotation angle of the handle lever 6 will be further described below with reference to FIGS. That is, if the handle lever 6 is turned by an angle θ ₁ (for example, 40 degrees) with respect to the on state of FIG. 5 in the off state of FIG. 6, the turning angle θ ₂ in the trip state of FIG. About half of ₁ (for example, about 20
Degree). Therefore, when the handle is in the on state,
Range stuck on-nameplate 8 visible from, and the extent hidden when its magnitude handle lever 6 is rotated by theta ₁ from the ON state. The same applies to the off nameplate 9. Trip nameplate 10 is in the range visible through the display window 3a of the cover 3 when the handle lever 6 is rotated by theta ₂ from the on state, pasted in a size not visible in the on state and an off state

In the three-pole circuit breaker shown in FIGS. 8 and 9, two intermediate cases 1 are connected, and a case 2 and a cover 3 are combined on both sides thereof. Thus, a left pole is formed by the middle case 1 and the case 2 on the left side of the drawing, a center pole is formed by the left and right middle cases 1, and a right pole is formed by the middle case 1 and the cover 3 on the right side. Operating handle 7 straddling handle lever 6 of each pole by increasing the number of poles
Is longer, but the other configuration is exactly the same as the case of two poles. The ON, OFF, and trip indications may be provided at one place regardless of whether it is two poles, three poles, or more poles. Although the off display is omitted in the figure, it goes without saying that the off nameplate is attached to the opposite side of the on nameplate 8.

[0014]

As described above, according to the present invention, in order to operate each single-pole circuit breaker at the same time, instead of simply attaching the connecting tool to the handle handle of each pole, the entire operation handle is connected to each one. By forming the operation handle on and off in an integrated manner in common to the poles, the operation handle can be displayed collectively in a large display space, thereby improving the appearance and making it easy to see. In addition, a trip indication is provided at the end of the operation handle so that the trip indication can be seen from the display window of the cover, so that the trip indication becomes clear as compared with the case where the trip state is determined from the handle position.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of an embodiment of the present invention in a two-pole circuit breaker.

FIG. 2 is a front view of the circuit breaker of FIG. 1 in an ON state.

FIG. 3 is a front view of the circuit breaker of FIG. 1 in an off state.

FIG. 4 is a front view of the circuit breaker of FIG. 1 in a trip state.

FIG. 5 is a partially enlarged sectional view taken along the line VV of FIG. 2;

FIG. 6 is a partially enlarged sectional view taken along the line VI-VI of FIG. 3;

FIG. 7 is a partially enlarged sectional view taken along line VII-VII of FIG.

FIG. 8 is a front view of the ON state of the embodiment of the present invention in the three-pole circuit breaker.

FIG. 9 is a front view of the circuit breaker of FIG. 8 in a trip state.

[Explanation of symbols]

 1 Intermediate case 2 Case 3 Cover 4 Handle hole 5 Handle hole 6 Handle lever 7 Operation handle 8 On nameplate 9 Off nameplate 10 Trip nameplate

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 73/12

Claims (2)

(57) [Claims] An opening / closing mechanism is accommodated in an insulating container comprising a case and a cover divided into two parts, and an operation of operating the opening / closing mechanism through a handle hole opened across a mating surface between the case and the cover. In the case of forming a multi-pole circuit breaker by connecting a plurality of single-pole circuit breakers having a protruding handle, a cover and a case which are to be back-to-back of two adjacent single-pole circuit breakers are integrated and the handle is integrated. An intermediate case having a shape in which holes penetrate left and right is provided, and an insulating container for a single-pole circuit breaker is made adjacent by combining a pair of cases and covers on both sides of one or a plurality of intermediate cases connected to each other. A plurality of sets are formed, and a common operating handle for connecting them to each handle lever of the single-pole circuit breaker constituted by these insulating containers is provided. A display device for a multi-pole circuit breaker, wherein the display device is mounted so as to close the handle hole of the case, the intermediate case, and the cover, and has a surface indicating an on / off state. 2. The display device for a multi-pole circuit breaker according to claim 1, wherein a display indicating the trip state is provided at one end of the operation handle, and a display window is provided on the cover so that the display can be viewed.