JP4139631B2 - Circuit breaker terminal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal device for a circuit breaker.
[0002]
[Prior art]
In order to connect a connection conductor such as an electric wire or a conductive bar to the circuit breaker, terminal devices provided at the end of the breaker case include an up terminal and a solderless terminal.
[0003]
First, as shown in FIG. 6, the up terminal 21 is provided at the end of the circuit breaker case 22, a female screw hole 23 a into which the terminal screw 24 is screwed is formed in the terminal seat 23, and the terminal screw is located above the terminal seat 23. A holding plate 25 having an insertion hole 25a through which 24 is inserted is disposed. A connection conductor 26 such as an electric wire is inserted between the holding plate 25 and the terminal seat 23, and a terminal screw is inserted into the insertion hole 25a of the holding plate 25. 24 is inserted into the female screw hole 23a of the terminal seat 23 with a screwdriver 28 or the like, so that the holding plate 25 and the terminal seat 23 sandwich and fix the connection conductor 26.
[0004]
Further, the solderless terminal 31 is provided with a female screw hole 32b into which the terminal screw 33 is screwed into the upper surface plate 32a of the box-shaped terminal fitting 32 bent in a substantially round cross section as shown in FIG. A terminal seat 34 is attached to the bottom plate 32 c on the inner surface of the metal fitting 32. The connection conductor 35 is inserted into the box-shaped terminal fitting 32 and the terminal screw 33 is tightened with a screwdriver 36 or the like, so that the tip of the terminal screw 33 presses the connection conductor 35 against the terminal seat 34 and is connected.
[0005]
These screw-type terminal devices require a tool such as a screwdriver when connecting the connection conductors, and have the disadvantages that it takes time to tighten the screws. There is a plug-in type quick connection terminal to solve these problems.
[0006]
As shown in FIGS. 1 and 5 of Japanese Patent Laid-Open No. 10-74545, the quick connection terminal includes a terminal seat (21), a locking spring (3), and a release button (4). A locking spring (3) having a retaining part (30) and a pressure contact part (31) is arranged on the lower side of the connection conductor (from the insertion hole (10) formed in the side surface of the circuit breaker case (1). 9) is inserted, the locking prevention part (30) of the locking spring (3) bites into and engages with the connection conductor (9), and the pressure contact part (31) connects the connection conductor (9) to the terminal seat ( 21) and is clamped and fixed. To remove the connection conductor (9), the release button (4) protruding from the upper surface of the circuit breaker case (1) is operated to release the engagement between the retaining portion (30) and the connection conductor (9). Can be pulled out.
[0007]
[Problems to be solved by the invention]
The quick connection terminal is configured such that the connection conductor is inserted in a locked state when connecting so that the connection conductor can be easily connected. However, this quick connection terminal has two drawbacks. The first is that the connection conductor is damaged by the locking prevention portion of the locking spring. Usually, in the branch breaker disposed on the distribution board, a conductive bar is connected to the terminal device on the power source side, and an electric wire is connected to the terminal device on the load side. When reconnecting the connection conductor, it was possible to reconnect by cutting off the damaged part of the electric wire, but it had to be replaced with the conductive bar. Second, alignment is difficult when connecting the branch breaker to the conductive bar. In order to solve these two problems, the connection conductor must be connected to the terminal device while operating the release button, and the workability is poor.
[0008]
In order to solve the above problem, as shown in FIGS. 10 and 11 of Japanese Patent Laid-Open No. 2000-215780, the terminal device on the power source side of the branch breaker (1) includes a terminal device called a plug-in terminal (8), and a load Some of the terminal devices on the side are equipped with quick connection terminals. This terminal device is composed of a U-shaped spring (8) having a narrow insertion slot as shown in FIG. 9, and is connected by press-fitting a plate-like conductive bar (2) into the U-shaped spring (8). It is.
[0009]
In general, branch breakers are attached to both sides of a conductive bar when arranged in a distribution board. However, a branch breaker with a plug-in terminal in the terminal device on the power supply side and a quick connection terminal in the terminal device on the load side must be mounted symmetrically with the conductive bar between them when it is installed on the distribution board. There wasn't. Since the mounting direction of the branch breaker is not constant, it looks bad, and the direction of the operation handle is also reversed, so it was difficult to understand whether the breaker was on or off. Moreover, in order to make the mounting direction of the branch breaker constant, there is a problem that two types of branch breakers must be prepared.
[0010]
Therefore, in view of the above problems, the object of the present invention is not to greatly damage the connection conductor at the time of connection, it is easy to align when installing the circuit breaker, and the type of connection conductor is not selected, It is an object of the present invention to provide a circuit breaker terminal device that can be used as both a power source side load terminal device and a load side terminal device.
[0011]
[Means for Solving the Problems]
To achieve the above object, according to the first aspect of the present invention, in a circuit breaker terminal device provided at an end of a circuit breaker case and provided with a connecting conductor inserted from an insertion hole on a side surface. A terminal seat formed of a metal plate material is disposed below the insertion hole, the terminal seat is urged upward by a spring provided at the lower portion, and an operation portion is provided on the upper side of the insertion hole from the upper surface of the circuit breaker case. The exposed resin stopper body is pivotally supported, and the stopper body protrudes into the insertion hole at the time of locking operation, and has a protruding portion that clamps and fixes the connection conductor with the terminal seat. The connection conductor inserted into the insertion hole can be engaged and disengaged by operating.
[0012]
According to a second aspect of the present invention, in the terminal device for a circuit breaker according to the first aspect, the operation part of the stopper body is accommodated substantially flush with the upper surface of the breaker case when locked, and is shut off when unlocked. It protrudes from the upper surface of the container case.
[0013]
According to a third aspect of the present invention, in the terminal device for a circuit breaker according to the first or second aspect, a metal plate is attached to the outer periphery excluding the operation portion of the stopper body. .
[0014]
According to a fourth aspect of the present invention, in the terminal device for a circuit breaker according to the third aspect, a part of the plate or the terminal seat located at the protruding portion of the stopper body that presses the connection conductor when the stopper body is locked. This is characterized in that a part of this is cut and raised to form a retaining portion.
[0015]
According to the invention described in claim 5, in the circuit breaker terminal device according to claim 3 or 4, a part of the plate is exposed from the upper surface of the circuit breaker case when the stopper body is locked. And
[0016]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, in the terminal device provided at the end portion of the circuit breaker case so that the connection conductor can be inserted from the insertion hole on the side surface, the metal plate material is formed below the insertion hole. The terminal seat is urged upward by a spring provided at the lower part, and a resin stopper body with the operation part exposed from the top surface of the circuit breaker case can be rotated above the insertion hole The stopper body protrudes into the insertion hole at the time of locking operation, and has a protruding part that clamps and fixes the connection conductor with the terminal seat, and the stopper body is operated by operating the operation part of the stopper body and inserted into the insertion hole. By making the conductors detachable, the connection conductors are not damaged significantly during connection, and positioning is easy when installing a circuit breaker. Use as both terminal devices on the load side Door can be.
[0017]
According to a second aspect of the present invention, in the terminal device for a circuit breaker according to the first aspect, the operation part of the stopper body is accommodated substantially flush with the upper surface of the breaker case when locked, and is shut off when unlocked. By projecting from the upper surface of the container case, the locked state of the terminal device can be confirmed at a glance, and the appearance when locked can be improved.
[0018]
According to a third aspect of the present invention, in the terminal device for a circuit breaker according to the first or second aspect, the stopper plate is provided by attaching a metal plate to the outer periphery excluding the operating portion of the stopper body. Damage due to wear can be prevented.
[0019]
According to a fourth aspect of the present invention, in the terminal device for a circuit breaker according to the third aspect, a part of the plate or the terminal seat located at the protruding portion of the stopper body that presses the connection conductor when the stopper body is locked. The connection conductor can be prevented from coming off by cutting and raising a part thereof to form the retaining part.
[0020]
According to a fifth aspect of the present invention, in the terminal device for a circuit breaker according to the third aspect, when a part of the plate is exposed from the upper surface of the breaker case when the stopper body is locked, the exposed portion of the plate A continuity test can be conducted by bringing a test bar into contact.
[0021]
【Example】
An embodiment of a terminal device for a circuit breaker according to the present invention will be described with reference to the accompanying drawings of FIGS.
[0022]
The terminal device 2 of the circuit breaker 1 is provided at the end of the circuit breaker case 3, and is attached with a terminal seat 4 made of a metal plate material, a resin stopper body 5, and the terminal seat 4 in the direction of the stopper body 5. It is comprised with the leaf | plate spring 6 which energizes.
[0023]
The terminal seat 4 is disposed below the insertion hole 8 in which the connection conductor 7 can be inserted from the side surface of the circuit breaker case 3, and a leaf spring 6 formed in a substantially C shape below the terminal seat 4 is provided. Has been placed. A stopper body 5 is rotatably supported on the upper side of the insertion hole 8 facing the terminal seat 4.
[0024]
The stopper body 5 is provided with the operation portion 5 a exposed from the upper surface of the circuit breaker case 3. The operation portion 5a is formed in a square shape, and a recess 3a is formed on the upper surface of the circuit breaker case 3, and when the stopper body 5 is locked, the operation portion 5a is accommodated in the recess 3a and is interrupted. The upper surface of the container case 3 is substantially flush with the upper surface.
[0025]
The stopper body 5 has a protruding portion 5 b that protrudes into the insertion hole 8 during the locking operation and clamps and fixes the connection conductor 7 with the terminal seat 4. A metal plate 9 is fitted and attached to the unevenness 5c on the outer periphery excluding the operation portion 5a of the stopper body 5 including the protruding portion 5b. A part of the plate 9 positioned at the protruding portion 5b is cut and raised to form a retaining prevention portion 9a.
[0026]
In order to connect the connection conductor 7 to the terminal device 2, first, the operating portion 5 a of the stopper body 5 is raised with a finger, and the stopper body 5 is rotated to be in a released state. Then, the connection conductor 7 is inserted from the insertion hole 8. When the leading end of the connection conductor 7 hits to the back, the stopper body 5 is brought down to the original position with a finger, and the stopper body 5 is rotated to be locked. Then, the protruding portion 5 b of the stopper body 5 presses the connection conductor 7 to the terminal seat 4. At this time, the leaf spring 6 bends and the terminal seat 4 moves according to the thickness of the connection conductor 7. In this way, the connection conductor 7 is clamped and fixed between the protruding portion 5b of the stopper body 5 and the terminal seat 4 to be connected. When the stopper body 5 is locked, the retaining member 9a bites into the connecting conductor 7, so that the retaining member is secured. In addition, although the connection conductor 7 is an electric wire in FIG.1 (b), as shown in FIG. 4, it can connect similarly also with a plate-shaped conductive bar. Further, even if the thickness of the connection conductor 7 is changed, the connection conductor 7 can be connected within the variable range of the leaf spring.
[0027]
When the stopper body 5 is locked, a part of the plate 9 is exposed from the upper surface of the circuit breaker case 3, so that a test rod can be brought into contact with the exposed portion 9b to conduct a continuity test.
[0028]
Moreover, in order to remove the connection conductor 7 from the terminal device 2, it can remove by raising the operation part 5a of the stopper body 5 with a finger | toe, and releasing a lock | rock.
[0029]
In the present embodiment, the leaf spring 6 is disposed below the terminal seat 4, but the present invention is not limited to this. For example, a coil spring 16 is used as shown in FIG. Without change, it can be changed as appropriate.
[0030]
Moreover, although the stopper part is formed on the plate of the stopper body, a stopper part can be formed by cutting and raising a part of the terminal seat. Further, it is not always necessary to attach a plate to the stopper body.
[0031]
In addition, a part of the plate is exposed from the upper surface of the circuit breaker case when the stopper body is locked so that the continuity test can be performed, but the terminal seat is processed to expose a part of the terminal seat from the circuit breaker case. You may do it.
[0032]
【The invention's effect】
As described above, according to the first aspect of the present invention, in the terminal device of the circuit breaker provided at the end portion of the circuit breaker case and provided so that the connection conductor can be inserted from the insertion hole on the side surface, A terminal seat made of a metal plate material is placed on the lower side of the hole, and the terminal seat is urged upward by a spring provided at the lower part to expose the operation part from the upper surface of the circuit breaker case to the upper side of the insertion hole. The stopper body made of plastic is pivotally supported, and the stopper body protrudes into the insertion hole at the time of locking operation, and has a protruding part that clamps and fixes the connection conductor with the terminal seat, and operates the operating part of the stopper body Since the connection conductor inserted into the insertion hole can be freely engaged and disengaged, the connection conductor can be held in an unlocked state, so that the connection conductor is not damaged and the circuit breaker is attached. Sometimes it ’s easy to align, And, choosing the kind of connection conductors, there is an effect that it corresponds with one type of breaker when using the branch breaker panelboard so can be used as a power source side and the load side of the both-terminal device.
[0033]
According to a second aspect of the present invention, in the terminal device for a circuit breaker according to the first aspect, the operation part of the stopper body is accommodated substantially flush with the upper surface of the breaker case when locked, and is shut off when unlocked. By projecting from the upper surface of the container case, the lock state of the terminal device can be confirmed at a glance, and the appearance when locked can be improved.
[0034]
According to a third aspect of the present invention, in the terminal device for a circuit breaker according to the first or second aspect, the stopper plate is provided by attaching a metal plate to the outer periphery excluding the operating portion of the stopper body. It is possible to prevent damage due to wear.
[0035]
According to a fourth aspect of the present invention, in the terminal device for a circuit breaker according to the third aspect, a part of the plate or the terminal seat located at the protruding portion of the stopper body that presses the connection conductor when the stopper body is locked. By cutting and raising a part of the wire to form the retaining portion, it is possible to prevent the connecting conductor from slipping.
[0036]
According to the invention of claim 5, in the circuit breaker terminal device according to claim 3 or claim 4, when a part of the plate is exposed from the upper surface of the circuit breaker case when the stopper body is locked, There is an effect that a continuity test can be performed by bringing a test bar into contact with the exposed portion of the plate.
[Brief description of the drawings]
1A and 1B are cross-sectional views of a main part of a terminal device for a circuit breaker according to the present invention, in which FIG. 1A shows an unlocked state and FIG.
FIG. 2 is a view showing a stopper body.
FIG. 3 is a perspective view of a circuit breaker showing a state in which an electric wire is connected to a terminal device.
FIG. 4 is a cross-sectional view of a main part showing a state in which a conductive bar is connected to a terminal device.
FIG. 5 is a cross-sectional view of an essential part showing a modified embodiment of the terminal device according to the present invention.
FIG. 6 is a cross-sectional view of a main part showing a terminal device of a conventional circuit breaker.
FIG. 7 is a cross-sectional view of a main part showing a terminal device of a conventional circuit breaker.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Terminal device 4 Terminal seat 5 Stopper body 5a Operation part 5b Projection part 5c Concavity and convexity 6 Leaf spring 7 Connection terminal 8 Insertion hole 9 Plate 9a Retaining prevention part 9b Exposed part

Claims (5)

In the circuit breaker terminal device provided at the end of the circuit breaker case and provided so that the connection conductor can be inserted from the insertion hole on the side surface, a terminal seat formed of a metal plate material is disposed below the insertion hole. The terminal seat is urged upward by a spring provided at the lower portion, and a resin stopper body with the operation portion exposed from the upper surface of the circuit breaker case is pivotally supported on the upper side in the insertion hole. The stopper body has a protruding portion that protrudes into the insertion hole at the time of locking operation and clamps and fixes the connection conductor with the terminal seat, and is inserted into the insertion hole by operating the operating portion of the stopper body. A terminal device for a circuit breaker characterized in that the connection conductor is freely detachable. 2. The circuit breaker according to claim 1, wherein the operation portion of the stopper body is stored substantially flush with an upper surface of the circuit breaker case when locked, and protrudes from an upper surface of the circuit breaker case when unlocked. Terminal device. The terminal device for a circuit breaker according to claim 1 or 2, wherein a metal plate is attached to the outer periphery excluding the operation portion of the stopper body. The stopper part is formed by cutting and raising a part of a plate or a part of the terminal seat located at a protruding part of the stopper body that is pressed against the connection conductor when the stopper body is locked. 4. A circuit breaker terminal device according to 3. 5. The circuit breaker terminal device according to claim 3, wherein a part of the plate is exposed from an upper surface of the circuit breaker case when the stopper body is locked. 6.

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