JP3534000B2 - Circuit breaker - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention selects a common terminal to be inserted and connected to one of three conductive bars and one of the remaining two conductive bars to select and connect. And a circuit breaker having a terminal.

[0002]

2. Description of the Related Art As a conventional circuit breaker having a terminal for inserting and connecting a conductive bar, there is one disclosed in JP-A-10-241540. In this conventional circuit breaker, in the single-phase three-wire type wiring path, the one that can be selectively connected to the two conductive bars by replacing the selection terminal in the upper stage, or two selection terminals are provided and these selection terminals are selected. Some terminals can be switched by a changeover switch and connected to one of the two conductive bars. There is also a conventional example in which two types of circuit breakers corresponding to two poles of a voltage pole are prepared. According to these conventional examples, it is possible to select the conductive bar to be appropriately connected according to the load balance of the single-phase three-wire wiring path.

[0003]

In the circuit breaker which can be selectively connected to the two conductive bars by replacing the above-mentioned select terminals, the select terminals are connected to the conductive bars to be connected from the body. There was a problem that it was very troublesome because it had to be removed one by one and relocated.

Further, a circuit breaker having two selection terminals, which can be connected to one of the two conductive bars by switching the selection terminals with a changeover switch, needs two selection terminals. There was a problem that the insertion force when connecting to each conductive bar was large and it was difficult to connect.

Further, in the conventional example in which two types of circuit breakers corresponding to two voltage poles are prepared, there is a problem that two types of circuit breakers must be prepared.

The present invention has been made in view of the above circumstances, and an object of the present invention is to easily and selectively connect one of the two conductive bars and to make the difference between the conductive bars. An object of the present invention is to provide a circuit breaker capable of reducing the input force.

[0007]

In order to achieve the above object, the invention of claim 1 inserts three conductive bars arranged in three stages of upper, middle and lower from the width direction. Corresponding to a body in which three insertion portions are vertically formed at one end and a lowermost insertion portion of the three insertion portions on one side of the body.
One common terminal for plug connection to one of the previous SL three conductive bars are allowed to disposed, of the remaining two conductive bars are arranged on one side of the device body In a circuit breaker equipped with one selection terminal for selecting and connecting one of them, the inner storage portion is connected to two insertion portions corresponding to the remaining two conductive bars. the inner side containing portion is provided on the inside of the vessel body, between at least two positions corresponding to the remaining two conductive bars, holding the selected terminal
Then, it is slid by the operation from the outside of the body.
A slide member that allows
It is characterized in that a through-hole communicating with the one-side storage portion is provided .

[0008]

[0009]

[0010]

[0011]

According to a second aspect of the present invention, in the first aspect of the invention, a slide member is provided on both sides of the inner surface of the inner storage portion, extending downward from above the container and engaging side portions of the slide member. It is characterized in that guide means is provided for guiding the vertical sliding movement of the.

According to a third aspect of the present invention, in the first or second aspect of the invention, at least one side surface of the slide member is provided with a protrusion protruding outward, and the slide member is provided on at least one side surface of the body. It is characterized in that a guide portion is formed through which the projecting portion is inserted while the member is positioned between the upper insertion portion and the lower insertion portion.

According to a fourth aspect of the invention, in the third aspect of the invention, the protruding portion of the slide member is formed at the tip of a leg piece extending below the position of the selection terminal, and the guide portion is It is characterized in that it is configured to have a guide groove extending upward from the bottom surface of the body and an insertion hole for the protrusion and the leg piece formed at the uppermost part of the guide groove.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 5, the circuit breaker using this embodiment has a first side case 1A and a second side case 1A made of synthetic resin on both sides.
Two fixed contacts 2A arranged side by side in the width direction of the body 1 are arranged in the body 1 formed by stacking and connecting the side cases 1B,
2B, two movable contactors 4A, 4B having movable contacts 3A, 3B fixedly facing (contacting / opening) each fixed contact 2A, 2B, and these two movable contactors 4A, 4B. 4B is provided with an opening / closing mechanism 5 and a handle 6
Each movable contact 3 is turned on and off through the opening / closing mechanism 5.
A and 3B are arranged to contact and separate from the fixed contacts 2A and 2B, respectively, and the fixed contacts 2A and 2B and the movable contacts 4 are arranged.
A and 4B are arranged vertically in the height direction of the body 1 and one movable contact 4B of the two movable contacts 4A and 4B is interposed between the two fixed contacts 2A and 2B in the height direction. When,
The fixed contact 2A with which the movable contact 3A of the other movable contactor 4A comes into contact with and separates from each fixed contact 2A, 2B.
It is arranged at a height position where A and 3B are separated from each other when viewed from the width direction of the body 1 so as not to intersect.

Inside one end of the body 1, both cases 1A and 1B are provided.
A partition member (hereinafter referred to as an intermediate case) 7 formed of a synthetic resin material is disposed so as to be sandwiched between the recesses 8 inside the side wall (outer wall) of the first side case 1A and the vertical direction of the intermediate case 7. The fixed contact 2A is provided in the partition formed with the wall portion 35.
Terminal block 10A having a fixed-side electric circuit configuration with a wire provided at one end
And a lower fixed contact 2B provided at one end in a partition formed by a recess 9 provided on the second side case 1B side of the intermediate case 7 and a side wall (outer wall) of the second side case 1B. A terminal block 10B, which is a side electric path configuration, is housed.

The inside of the other end of the one body 1 is shown in FIG.
As shown in FIG. 5, a storage for storing and arranging one common terminal T1 for inserting and connecting the lowermost conductive bar L3 among the three conductive bars L1 to L3 arranged at different positions (vertical direction in the drawing). Between the portion 90 and at least two positions corresponding to the two conductive bars L2 and L3, one selection terminal T2 for selecting and connecting one of the remaining two conductive bars L1 and L2 is connected. An inner storage portion 200 is provided so as to be movable.

Both the common terminal T1 and the selection terminal T2 are substantially U-shaped, and are composed of blade receiving springs that are expanded toward the tips after the tips of both side pieces that are vertically parallel to each other come close to each other. The bars L1, L2 or L3 are easily inserted, and the conductive bars L1, L2 or L3 are sandwiched between the central and adjacent portions.

In the inner housing portion 200, the inner housing portion 200 of the first side case 1A is constructed as a positioning means for positioning the selection terminal T2 at two positions respectively corresponding to the remaining two conductive bars. A projection 97 having a substantially semicircular cross section is provided on the end wall surface of the compartment in the width direction of the first side case 1A.

A conductive bar L2, L having two selection terminals T2 is provided on the wall corresponding to the ceiling of the inner housing portion 200 of the body 1.
As a display means for displaying which of the three positions is corresponding to the position, the through hole 20 communicating with the inner storage portion 200 is provided.
1, the columnar display unit 20 is formed on the slide member 83 which accommodates the selection terminal T2 from the through hole 201.
2 can be visually recognized from the outside by facing the through hole 201,
The position of the selection terminal T2 can be known depending on whether or not the position is away from 01 and cannot be visually recognized from the outside. It is also possible to push the slide member 83 from the outside through the through hole 201 and move it downward. The through hole 201 is a circular hole formed by abutting the semicircular cutout holes 201a provided on the upper side walls of the both-side cases 1A and 1B.

The slide member 83 is made of a synthetic resin molded product and is formed in the shape of a frame with both end surfaces corresponding to both end directions of the body 1 open, and the blade receiving spring constituting the selection terminal T2 is opened from one end. The tip end of the blade receiving spring is inserted into the other end opening and is held so as to project from the other end opening.
2 is arranged so as to be movable in the vertical direction.

A vertical direction in which slide protrusions 203 formed on both sides of the slide member 83 are vertically movably engaged and slid on the inner surfaces of the side walls of the both-side cases 1A and 1B constituting the both side walls of the inner storage portion 200. 2 of the guide groove of
The inner housing portion 200 is formed between the parallel projections 205 of the strip, and the inner housing portion 200 is engaged with the slide projections 203 on both sides of the slide member 83 in the guide grooves 204, 204 on the both side walls, together with the slide member 83 and the selection terminal. T2 is stored and held so as to be slidable in the vertical direction. In addition, a slide protrusion is provided on the inner storage portion 200 side, and a guide groove is provided on the slide member 8.
It may be provided on the third side.

The slide member 83 is a leg piece 8 extending downward from the side portion of the first side case 1A as shown in FIG.
3a is integrally extended, and a protruding portion 206 protruding outward is formed at the lower end of the leg piece 83a.

The protruding portion 206 is a slide groove formed on the outside of the side wall of the first side case 1A forming the side wall of the inner storage section 200 and extending upward from the bottom surface of the first side case 1A as shown in FIG. The slide groove 20 is inserted from an insertion hole 208 opened at the upper end bottom portion of 207 so as to communicate with the inner storage portion 200.
7 is inserted into the slide groove 207 together with the leg piece 83a.
The inside is slidable vertically.

The slide groove 207 and the insertion hole 208 constitute a guide portion for vertically moving the slide member 83 to which the selection terminal T2 is mounted, and the bottom portion of the slide groove 207 projects into the inner storage portion 20. The bottom surface of the leg piece 83a, which is formed in the upper part of the slide groove 207 and is inserted into the slide groove 207 through the insertion hole 208 formed in the bottom of the upper end of the slide groove 207, can be slidably contacted with the bottom portion of the slide groove 207. . Further, the protrusion 206 is provided at the uppermost part of the slide groove 207.
A protrusion 207 is provided that abuts when the slider moves to the upper end of the slide groove 207.

However, the protruding portion 206 has the inner storage portion 200.
If the operation portion for vertically moving the selection terminal T2 in the inside is constituted and the projection 206 is held from outside the body 1 or is pushed up or down by a driver or the like to slide in the slide groove 207, the slide is performed. Along with the movement, the slide member 83 in the inner storage portion 200 moves up or down together with the selection terminal T2 by being guided by the slide protrusion 203 and the guide groove 204.

Here, the position where the projection 206 is at the lower end of the slide groove 207 is the position where the selection terminal T2 corresponds to the middle conductive bar L2 as shown in FIG. 2, and the projection 206 is above the slide groove 207. The length of the leg piece 83a and the guide portion are configured such that the position of the leg terminal 83a corresponds to the selection terminal T2 of the upper conductive bar L1 as shown in FIG. The position of the selection terminal T2 can correspond to the upper conductive bar L1 or the middle conductive bar L2.

When the slide member 83 is moved by the above operation, the upper end or the lower end of the slide member 83 rides over the positioning projection 97 by its elasticity and the rounded surface of the positioning projection 97, and the positioning projection 97 is framed after the movement. The lower part or the upper part of the tip of the portion 83 hits and holds the position of the selection terminal T2.

At the other end of the body 1, both side cases 1A, 1
B-shaped insertion grooves 209a to 209c for inserting conductive bars, which are open at the end and side surfaces by abutting L-shaped notched grooves formed on the end wall and the side wall, are arranged in three steps, upper, middle, and lower. It is formed so as to correspond to the three conductive bars L1 to L3 that are formed, and the upper and middle insertion portions 209a and 209b are formed.
Is connected to the inner storage portion 200, and the lowermost insertion portion 209c is connected to the storage portion 90.

The common terminal T1 is used for the electromagnetic drive unit 4 which will be described later.
A conductive plate 71 for fixing and holding 7 is mechanically integrally connected and electrically connected, and the selection terminal T2 is electrically connected to a bimetal 46 described later through a braided wire 82.

Now, the terminal block 1 electrically connected to the common terminal T1 and the selection terminal T2 through the opening / closing mechanism 5.
Of 0A and 10B, the terminal block 10A is integrally extended from a terminal plate 11 bent in a U shape and one end of a lower piece of the terminal plate 11 from the upper end of the extension piece 11a to the extension piece 11a. A fixed contactor 12A which is bent at a right angle and integrally extends outwardly with respect to the terminal board 11, and a fixed contact 2A which is fixed by caulking to an upper surface of one end of the fixed contactor 12A.
And a substantially U-shaped locking spring 13A placed on the lower piece of the terminal plate 11 and housed in the terminal plate 11, on the bottom surface of the recess 8 of the first side case 1A which is inclined downward. The lower piece of the terminal plate 11 is placed on the rising wall 8 at one end of the recess 8.
The extension piece 11a is arranged along a and the rising wall 8
The fixed contact 12A is led out of the concave portion 8 beyond the upper end of a, and is inclined similarly to the bottom portion of the concave portion 8 between the rising wall 8a and the partition wall 14 rising from the bottom portion of the first side case 1A. By disposing the tip of the fixed contact 12A on the fixed contact arranging portion 15 formed integrally, the terminal block 1
0A is arranged in the recess 8. The fixed contact arrangement portion 15 is formed with a recess 15a that allows the lower end of the fixed contact 2A protruding to the lower surface side of the fixed contact 12A to escape. The terminal plate 11 is formed by integrally extending a T-shaped piece 11b upward from the other end of the upper piece, and one end of a side protrusion of the upper end of the T-shaped piece 11b is attached to the inner surface of the first side case 1A. It is placed on the upper end surface of the formed convex flat portion 22. Further, on the side surface of the side piece of the terminal plate 11, there is integrally formed a protrusion 23 which is inserted into the pressing piece 13b of the locking spring 13A and prevents rattling of the locking spring 13A.

The locking spring 13A and the terminal plate 11 constitute a quick-connect terminal which is a conductor connecting portion. When the intermediate case 7 is superposed on the first side case 1A, the other end portion of the first side case 1A is Diagonal downward groove 1 with a semicircular cross section formed in the vertical wall
60, and an electric wire (not shown) inserted from the outside through an oblique downward electric wire insertion hole 16A formed by an oblique downward groove 160 of a similar shape formed on the opposing wall surface of the intermediate case 7 as shown in FIG. ) Is press-fitted between the upper piece of the terminal plate 11 and the upper ends of the locking pieces 13a and the pressing pieces 13b of the locking spring 13A. Locking and holding piece 13
By pressing the core wire against the upper piece of the terminal plate 11 at the upper end surface of b, the core wire is electrically connected and mechanically held.

A release handle 17 is used to release the electric wire lock. A rotation shaft 18 provided on the lower side surface of the release handle 17 has a shaft hole 20 provided on a convex flat portion 22 on the inner side surface of the first side case 1A. A shaft 36 that is rotatably supported by the intermediate case 7 and that protrudes from the wall surface of the vertical wall portion 35 of the intermediate case 7 is rotatably supported by a recess 37 provided on the other side surface of the lower portion. When the operating portion 17a exposed to the outside of the body 1 is manually operated and rotated counterclockwise, the drive protrusion 19 provided at the lower end is the tip of one side end of the locking piece 13a of the locking spring 13A. By pushing, the locking piece 13a is bent and the locking with respect to the core wire can be released. Reference numeral 21 in FIG. 5 is a return spring that constantly biases the release handle 17 in the clockwise direction.

On the other hand, the terminal block 10B is basically the same as the terminal block 10A and has a terminal plate 11 and a locking spring 13B.
And the fixed contactor 12B, the terminal block 10 is different from the terminal plate 11 of the terminal block 10A.
The terminal plate 11 of B is an extension piece 1 extending downward from one end of the lower piece.
1c is formed by extension, and the body 1 is formed from the tip of the extension piece 11c.
The fixed contact 12B is formed to extend in parallel with the bottom of the terminal plate 11 and the back piece 11d is formed to extend at a right angle from one end of the side piece of the terminal plate 11.

The locking spring 13B has the same structure as the locking spring 13A, and is placed on the lower piece of the terminal plate 11,
The protrusion 23 protruding from the side piece of the terminal board 11 is the pressing piece 1.
It is designed to be inserted into 3b.

The terminal block 10B constitutes the bottom of the recess 9 of the intermediate case 7, and the lower piece of the terminal plate 11 is placed on the lateral wall 24 extending substantially parallel to the bottom of the body 1. The inner strip 11d is provided along the vertical wall 25 at one end of the recess 9 and one end of the terminal plate 11 is fitted into a notch 27 formed between the lower end of the vertical wall 25 and one end of the horizontal wall 24 to extend the extension piece. When the intermediate case 7 is superposed on the first side case 1A side, the tip of the fixed contact 12B, that is, the lower surface provided with the fixed contact 2B is the first side case. It is designed to be placed on the ribs 26, 26 at the bottom of 1A.

The fixed contact 2B is a lateral wall portion 24 of the intermediate case 7.
Further, it is arranged across both the cases 1A and 1B in a space formed between the bulging portion 30 and the side walls of the both cases 1A and 1B described later. The recess between the ribs 26, 26 is the fixed contact 12
The bottom end of the fixed contact 12B of the fixed contact 2B, which is caulked and fixed to the front end of B, protrudes to the lower surface side and escapes.

Further, the tip of the lateral projection of the upper end of the T-shaped piece 11b extending upward from the other end of the upper piece of the terminal plate 11 has a convex flat portion 22 'formed on the wall surface of the intermediate case 7. Is placed on the top surface of the.

The locking spring 13B and the terminal plate 11 of the terminal block 10B constitute a quick connection terminal which is a conductor connecting portion as in the case of the terminal block 10A, and when the intermediate case 7 is superposed on the second side case 1B. A diagonal downward groove 160 having a semicircular cross section provided in the vertical wall portion 28 at the other end of the recess 9 of the intermediate case 7, and a vertical wall at the other end of the second side case 1B like the diagonal downward groove 160. Diagonal downward groove 160 provided in
When the electric wire is inserted through the electric wire insertion hole 16B formed by and, the core wire is locked by the locking piece 13a of the locking spring 13B,
The pressing piece 13b presses the core wire against the upper piece of the terminal plate 11 to electrically connect the electric wire and mechanically lock the electric wire.

A release handle 17 'is used to release the electric wire lock. The release handle 17' has a rotary shaft 18 provided on the lower side surface thereof like the release handle 17 and has a convex flat portion 22 of the intermediate case 7. 'A shaft 38 rotatably supported in a shaft hole 20 provided in the second side case 1B and protruding from an inner wall surface of the second side case 1B is rotatably supported in a recess 37 formed on a side surface of the second side case 1B. When the operating portion 17a exposed to the outside of the body 1 is manually operated and rotated, the driving projection 19 provided at the lower end pushes the tip of one end of the locking piece 13a of the locking spring 13B to lock the locking piece. The locked state can be released by bending 13a. Reference numeral 21 'in FIG. 5 is a return spring for constantly biasing the release handle 17' in the clockwise direction.

As shown in FIG. 6, the intermediate case 7 is second with respect to the vertical wall portion 35 which is substantially parallel to the side walls of both cases 1A and 1B.
A bulging portion 30 that protrudes to the side case 1B side and abuts against the inner surface of the side wall of the second side case 1B is formed, and the wall hanging from the lower surface of the bulging portion 30 is the vertical wall 25.
A recess 34 surrounded by a side wall facing the B side, a bottom wall 31, a vertical wall 32 at one end, and a ceiling wall 33 is provided on the first side case 1A side. The intermediate case 7 is provided on the first side case 1A side.
When the butts are butted, the tip side portions of the fixed contacts 12A of the terminal block 10A assembled to the first side case 1A side are placed on the step surface 31a of the bottom wall 31 of the recess 34, and the ceiling wall 33 is It is arranged along the lower surface of the lateral wall 29 protruding from the inner side surface of the first-side case 1A. The fixed contact 2A fixed by caulking to the fixed contact 12A on the step surface 31a
A groove 31b is formed to allow the lower end portion of the groove to escape. Vertical wall 3
2 is formed with an opening 39 for inserting the free end of the movable contactor 4A corresponding to the fixed contact 2A into the recess 34.

The opening / closing mechanism 5 for driving the movable contacts 4A, 4B to open / close has the operation plate 43 as a latch member, the crossbar 40, and the stepped locking portion 5 for locking one end of the operation plate 43.
First tripping plate 41 and second tripping plate 42
In addition to these, the handle 6 and the U-shaped link 44, two bimetals 45 and 46 that drive the opening / closing mechanism 5 when an overcurrent is detected, and further drive the opening / closing mechanism 5 when a short-circuit current flows. Electromagnetic drive units 47 and 48 are added to form a common component.

The handle 6 is composed of an operating portion 6a, a rotating portion 6b, and a handle shaft 6c. The handle shaft 6c protruding in the center of both side surfaces of the rotating portion 6b is formed on the inner surface of the first side case 1A. Rotatably inserted into the shaft hole 49 formed in the second side case 1B and the shaft hole 49 formed in the inner surface of the second side case 1B, and held between the cases 1A and 1B. , 1B in a superposed and coupled state so as to face a window hole 50 opened on the upper surface of the body 1. A torsion spring 51 is attached to the handle shaft 6c, and the torsion spring 51 biases the handle 6 in the off operation direction at the on operation position.

The upper shaft 44a of the link 44 is rotatably inserted into a shaft hole 52 provided at the lower end of the rotating portion 6b as shown in FIG. 20, and is connected to the operating plate 43 through the link 44. There is.

The operating plate 43 is a bearing hole 4 provided on both sides of the center.
By inserting the lower shaft 44b of the link 44 into the 3a, the lower shaft 44b is connected to the handle 6 through the link 44, and is vertically movably arranged in the body 1.

The crossbar 40 is pivotally supported between the cases 1A and 1B by inserting shafts 40a protruding from both side surfaces of the upper part into shaft holes 52 and 52 formed on the inner side surfaces of the cases 1A and 1B. As shown in FIG. 7, a groove 54 for laterally fitting the side portion of the movable contactor 4A is formed on the side portion of the first side case 1A side slightly below the shaft 40a, and a lower second side case 1B. Cut grooves 55 into which the movable contacts 4B are fitted in the lateral direction are provided on the side portions on the side. And on the end face of the movable contact,
Stop pieces 130 protruding from the inner surfaces of the side walls of the intermediate case 7 and both cases 1A, 1B are engaged with the movable contacts 3A, 3B separated from the fixed contacts 2A, 2B, and their bottom portions are engaged. A recessed groove 131 that abuts against is formed in the width direction.

Here, the movable contactor 4A is made of a rigid conductive metal plate, is inserted into the cut groove 54 of the crossbar 40 from the side, and has a recess provided behind the cut groove 54 as shown in FIG. In the portion 54a, the rear lower surface and the recessed portion 54a
Coil spring 53 for contact pressure that is compressed between the bottom of the
The rear part is urged upward by means of which the movable contact 4A rotates about the opening edge of the cut groove 54 when the crossbar 40 rotates about the shaft 40a, and the movable contact 4A moves to the free end. The movable contact 3A fixed by crimping is opened / contacted with the corresponding fixed contact 2A.

The movable contactor 4B is made of a conductive spring thin plate material. When the crossbar 40 is rotated counterclockwise in FIG. 20, the movable contactor 4B is pushed downward to bend, and from this bent state, the crossbar 40 is clocked. When the movable contact 3B is rotated in the direction, the movable contact 3B, which is caulked and fixed to the tip, is brought into contact with and separated from the fixed contact 2B by the bending and the return.

The lower end of the crossbar 40 is
The coil spring 62 compressed between the bottom of the first side case 1A and the wall 63 is pressed by the coil spring 62 to urge a clockwise rotational force in FIG.

The first tripping plate 41 has a shaft portion 41a, a protruding portion 41b protruding above the shaft portion 41a, and a shaft portion 41a.
a side piece portion 41c having a surface orthogonal to the shaft portion 41a on the side of the second side case 1B of a, and an arm piece 41d integrally extended from one end to the upper end of the side piece portion 41c.
Both ends of the case are inserted into shaft holes 56, 56 provided on the inner side surfaces of the cases 1A, 1B, and are rotatably supported between the cases 1A, 1B. An engaging portion 57 with which one end (the right end in FIG. 20) of the plate 43 is disengaged.
And a receiving portion 88 that is driven by the driving portion 58a of the movable iron core 58 of the electromagnetic driving portion 47 at the upper end of the arm piece 41d.
Are formed respectively. Further, on the side surface of the second side case 1B below the side piece portion 41c, the receiving portion 5 which is pushed and moved by the facing portion 42a provided on the end surface of the lower end portion of the second trip plate 42.
9 is formed on the side surface of the receiving portion 59. The engaging portion 6 is provided on the side surface of the receiving portion 59 for engaging both ends of the torsion spring 60 for fitting the ring portion to the shaft portion 41a.
1 is provided. On the side surface of the first side case 1A below the side piece portion 41c, the first side which is opposed to the lower end of the bimetal 45 hanging from the conductive plate 71 that holds the electromagnetic drive unit 47 fixed and is pressed when the bimetal 45 is bent and displaced. A drive unit 69 is provided.

The second trip plate 42 has a shaft hole 42b in the central portion.
In the first side case 1A, the shaft body 66 provided at the center of the end face of the separation wall 65, which is a partition integrally formed from the upper side of the first side case 1A to the vicinity of the bottom side, is inserted into the inner side surface of the first side case 1A. , 1B is rotatably supported between 1B,
On the lower end face on the opposite side of the facing part 42a, a receiving part 68 is provided which is pushed by the driving part 67a of the movable iron core 67 of the electromagnetic driving part 48 shown in FIG. On the side surface of the upper side of the second tripping plate 42 on the side of the first side case 1A, the upper surface of the bimetal 46 standing upright from the rear end of the movable contactor 4B holding the electromagnetic drive 48 is opposed to the side surface of the bimetal 46. A second drive unit 70 is provided which is pushed when the curved displacement of the.

The conductive plate 71 made of a thin metal material is formed by being bent in an inverted L shape as shown in FIG. 9. The outer horizontal piece 71a has the electromagnetic drive portion 47 fixed thereto, and the outer horizontal piece 71a.
The horizontal piece of the upper end reverse L-shaped part of the bimetal 45 is welded and fixed to the step surface of the lower end of the inner horizontal piece 71b which is folded back in a U shape from the tip of a and made parallel to the outer horizontal piece 71a. is there.

As shown in FIG. 10, the electromagnetic drive unit 47 includes a fixed iron core 74 having a U-shaped horizontal cross section obtained by bending a magnetic iron plate in an inverted L shape and bending both side ends of the vertical piece at right angles.
The movable iron core 58 and the leaf springs 73 for supporting the movable iron core 58 on the magnetic pole surfaces of both ends of the fixed iron core 74 so as to be swingable, are formed from a horizontal piece integrally formed at a right angle with the fixed iron core 74. Is a flat plate 75, and the outer horizontal piece 71 of the conductive plate 71
Inserted between a and the inner lateral piece 71b, the inverted T-shaped piece 76 hung from the central portion of both lateral edges of the outer lateral piece 71a is engaged with the notch groove 75a at the central portion of both lateral edges of the flat plate 75. As a result, the fixed iron core 74 is fixed to the conductive plate 71 as shown in FIG.

The movable iron core 58 is made to project to the surface on the fixed iron core 74 side, and the projections 58b, 58b are formed on the central piece 73a of the leaf spring 73.
The plate spring 73 is swingably supported by being inserted into holes 73b, 73b formed at the upper end of the and fixed by caulking. The leaf spring 73 includes side pieces 73c, 73c formed by bending both sides of the central piece 73a, and side pieces 74a, 7c of the fixed iron core 74.
Both side pieces 73c, 7 are arranged along the outer surface of 4a.
Locking pieces 73d, 73d protruding inward from the tip of 3c
Is formed in the outer corner of the fixed iron core 74.
It is fixed to the fixed iron core 74 by being locked to 4b.

The magnetic pole surface formed by the inclined surfaces at the tips of the both side pieces 74a, 74a of the fixed iron core 74 is the central piece 73a of the leaf spring 73.
And the movable iron core 58 via the side pieces 73c, 73c.
The movable iron core 58 is attracted and oscillated by the magnetic force generated on the magnetic pole surfaces of the both side pieces 74a, 74a of the fixed iron core 74 when an excessive current such as a short-circuit current flows through the conductive plate 71. A drive portion 58 projecting from one end face of 58
a is moved.

The insertion hole 72 of the outer lateral piece 71a of the conductive plate 71
The adjusting screw 77 is attached to the screw hole 78 provided in the center of the flat plate 75.
Is screwed in, and its tip is made to face the horizontal piece of the upper end inverted L-shaped portion of the bimetal 45 via the inner horizontal piece 71b, and the adjustment screw 7
The initial position of the lower end of the bimetal 45 can be adjusted by bending the inner lateral piece 71b by screwing 7 (see FIG. 11).

The above-mentioned common terminal T1 is welded and fixed to the lower end of the vertical piece 71c of the conductive plate 71, and the braided wire 79 whose one end is welded to the movable contact 4A is attached to the plate surface slightly above the lower end of the bimetal 45. The other end is welded, and the common terminal T1, the conductive plate 71, the bimetal 45, the braided wire 79, the movable contact 4
A is electrically connected.

On the other hand, as shown in FIG. 8, the movable contactor 4B, which holds the electromagnetic drive portion 48, is folded back in a U shape with its rear end portion as an outer piece to form an inner lateral piece 80 parallel to the rear end portion. The lower end L of the bimetal 46 is attached to the step surface at the upper end of the inner horizontal piece 80.
The horizontal piece of the character-shaped folded portion is placed, welded and fixed, and the bimetal 46 is erected.

The electromagnetic drive unit 48 is the electromagnetic drive unit 47 described above.
The fixed iron core 74 ′, the leaf spring 73 ′ and the movable iron core 67 which are formed in the same shape as
The flat plate 75 ′ integrally formed with the movable contactor 4B is inserted between the rear end of the movable contactor 4B and the inner lateral piece 80, and the movable contactor 4B is inserted into the notch groove 75a ′ at the center of both side edges of the flat plate 75 ′. The fixed iron core 74 is fixed to the rear end portion of the movable contactor 4B as shown in FIG. 12 by engaging the T-shaped pieces 76 'which are erected from the central portions of both side edges of the rear end portion.

The movable iron core 67 has a protrusion (not shown) projected on the surface on the fixed iron core 74 'side and a central piece 73 of the leaf spring 73.
By being inserted into holes 73b 'and 73b' formed in the upper end of a'and fixed by caulking, the leaf spring 73 'is swingably supported, and the leaf spring 73' is bent and formed on both sides of the central piece 73a '. Fixed both sides 73c 'and 73c' to the fixed iron core 74 '
The locking pieces (not shown), which are arranged along the outer surfaces of the both side pieces 74a ', 74a' and project inwardly at the tips of the both side pieces 73c ', 73c', are attached to the outside of the fixed iron core 74 '. By being fixed to the recesses 74b ′ and 74b ′ formed at the corners, they are fixed to the fixed iron core 74.

Both side pieces 74a ', 74 of the fixed iron core 74'
The magnetic pole surface formed by the inclined surface at the tip of a'is opposed to the movable iron core 67 through the gap between the central piece 73a 'of the leaf spring 73' and both side pieces 73c ', 73c', and an excessive amount such as a short circuit current is generated. When an electric current flows through the movable contactor 7B, the movable iron core 67 is attracted and swung by the magnetic force generated on the magnetic pole surfaces of the both side pieces 74a ', 74a' of the fixed iron core 74 ', and the movable iron core 67 is projected on one end surface of the movable iron core 67. The drive unit 67a which is being operated is moved.

A screw hole 7 provided at the center of the flat plate 75 'through an insertion hole (not shown) provided at the rear end of the movable contactor 4B.
The adjusting screw 77 ′ is screwed into the 8 ′ from below, and the tip of the adjusting screw 77 ′ is opposed to the horizontal piece of the lower end L-shaped portion of the bimetal 46 via the inner horizontal piece 80, and the adjusting screw 77 ′ is screwed forward. By bending the inner piece lateral 80, the upper end position of the bimetal 46 can be adjusted (FIG. 11).
reference).

On the plate surface slightly below the upper end of the bimetal 46, the other end of the braided wire 82, one end of which is welded to the above-mentioned select terminal T2 in the slide member 83, is welded.
2, the bimetal 46, and the movable contactor 4B are electrically connected.

In assembling the circuit breaker of this embodiment, first, the terminal block 10A is housed in the recess 8 of the first side case 1A, and the release handle 17 is installed in a fixed position together with the return spring 21.

Further, the handle 6 is put in a predetermined position and the torsion spring 5
20, the common terminal T1 is housed in a housing portion 90 provided at the bottom of the other end of the body 1 as shown in FIG. 20, and the vertical piece 71c of the conductive plate 71 is attached to the partition wall 91 of the first side case 1A.
Separation formed on the inner side flat surface of the first side case 1A by arranging along the L-shaped gap between 92 and arranging the outer lateral piece 71a parallel to the upper surface of the upper lateral wall portion 92a of the partition wall 92. The electromagnetic drive unit 47 and the bimetal 45 are arranged on the left side wall surface (in FIG. 20) of the wall 65. At this time, the semi-circular rib 103 protruding from the inner side surface of the first side case 1A is fitted and positioned in the U-shaped bent portion of the outer lateral piece 71a of the conductive plate 71 and the inner lateral piece 71b.

Then, the movable contact 4A is fitted into the cut groove 54 of the crossbar 40, and the coil spring 53 is recessed into the recess 5.
It is housed in 4a and rotatably arranged at a predetermined position of the first side case 1A. Further, the operating plate 43 is arranged so as to be connected to the handle 6 by a link 44.

Further, the electromagnetic drive section 48 and the bimetal 46 are housed in the space between the partition wall 65 and the partition wall 92, and the selection terminal T2 together with the slide member 83 is constructed when the second side case 1B is butted. Inner storage 2
00 is stored in a compartment inside the first side case 1A (this storage position may be a position corresponding to either the conductive bar L1 or L2). Further, the leg piece 83a of the slide member 83 is inserted into the slide groove 207 formed on the outer side surface of the side wall of the first side case 1A via the insertion hole 208, and the protrusion 2 is formed.
06 is exposed to the outside.

Further, the slanted upwardly inclined portion of the central portion of the movable contactor 4B is moved toward the other end of the first side case 1A from the lower end of the separation wall 65 located slightly above the bottom side of the first side case 1A. Is arranged between the partition wall 95 which is parallel to and extending upwardly from the parallel portion and which is extended upward and the bottom portion of the first side case 1A, and the free end side of the movable contactor 4B is mounted on the partition wall 1.
It is arranged in the space in which the fixed contact 12B is arranged via the four notches 14a.

At this time, the rear ends of the movable contacts 4B are sandwiched and fixed by ribs 96 protruding from the bottom surface of the parallel portion of the partition wall 95 and the bottom portion of the first side case 1A. At this time, the first side case 1A is placed in the U-shaped bent portion between the rear end portion and the inner lateral piece 80.
The semi-circular rib 103 'protruding from the inner surface of the
Positioned.

Furthermore, the first tripping plate 41 is rotatably arranged at a fixed position together with the torsion spring 60, and further the second tripping plate 41 is arranged.
The trip plate 41 is rotatably arranged in a fixed position.

In this manner, as shown in FIG. 20, except for the intermediate case 7, the terminal block 10B housed in the recess 9 of the intermediate case 7, the release handle 17 'and the return spring 21' thereof, the first case 1A side. After being arranged and assembled, the intermediate case 7 in which the terminal block 10B, the release handle 17 'and the return spring 21' are assembled in the recess 9 is arranged so as to overlap the first side case 1A side.

When the intermediate case 7 is disposed at a fixed position on the first side case 1A side, the free end side of the movable contactor 4A is disposed in the recess 34 through the opening 39 of the vertical wall 32 and at the same time. , Fixed contactor 1 provided on the terminal block 10A
The front end side portion of 2A is placed on the step surface 31a of the bottom wall 31, and the shaft 36 is provided with the recess 3 of the release handle 17.
It will fit in 7.

On the other hand, the fixed contacts 12B provided on the terminal block 10B are placed on the ribs 26 on the bottom of the first side case 1A. Further, the lower surface of the downward step formed on the end of the intermediate case 7 is placed on the flat surface formed on the end wall of the first side case 1A.

In this state, the second side case 1B is superposed on the first side case 1A side to be joined. At this time, the claw-shaped hooking locking portions 101 at the tips of the elastic locking pieces 100 at the upper and lower ends of the four portions integrally projected from the first side case 1A to the second side case 1B side are located on the second side case 1B side. The first side case 1 </ b> A and the second side case 1 </ b> B are coupled and fixed by being locked to the corresponding projecting hooked portion 102 (FIGS. 13 to 17 and the like). reference). This first
When the side cases 1A and 1B are disengaged from each other, the driver 151 is inserted into the second side case 1B through the release holes 150 that are opened corresponding to the hooked portions 102. By pushing the hook locking portion 101 of 100 ... upward to release the hooking state with the hooked portion 102,
The second side case 1B can be removed from the first side case 1A.

By attaching the second side case 1B, the shaft 40a of the crossbar 40 and the shaft portion 41a of the first tripping plate 41 are fitted in the shaft holes 52 and 56 provided on the inner surface of the second side case 1B. It is inserted rotatably.

The heads of the adjusting screws 77, 77 'corresponding to the bimetals 45, 46 are, as shown in FIG.
The opening 104 opened on the upper surface of the device and the opening 105 opened on the bottom as shown in FIG. 19 are respectively faced, and the openings 104 and 105 are opened so as to obtain an optimum operating point during the operation test after assembly. The initial positions of the bimetals 45, 46 are shown in FIG.
The adjustment is performed from (a) to (b) in the figure, and after the adjustment, the upper lid 106 and the lower lid 106 'are fitted to the respective portions of the body 1 by utilizing the elasticity thereof and the openings 104 and 105 are formed. Cover up.

The bimetals 45 and 46 are arranged side by side in the longitudinal direction of the body 1 with the width direction of the body 1 as the width direction so as to partially overlap with each other, so that the dimension of the body 1 in the width direction can be made compact. ing. Further, since the displacement directions are set to the outer sides of each other, the initial positions where the bimetals 45 and 46 are not displaced are known in advance, and even when the bimetals 45 and 46 are displaced, the bimetals 45 and 46 are not closer than the initial positions. Work is easy.

That is, if they are displaced in the same direction, it is necessary to check the displacement amount and dispose them.
Although the work of disposing 5, 46 is troublesome, the embodiment does not have such trouble.

Further, since the partition wall 65, which is a partition wall, exists between the bimetals 45 and 46, the space between the bimetals 45 and 46 can be narrowed, and the opening / closing mechanism 5 and the contact portion housed in the body 1 can be made. The installation space of is sufficiently large. Furthermore, since the braided wires 79 and 82 connected to the bimetals 45 and 46 are drawn from the vertical direction of the body 1,
This facilitates the work of routing the braided wires 79 and 82.

Thus, the inner storage portion 20 inside the other end of the body 1
0 and the accommodating portion 90 accommodate the selection terminal T2 and the common terminal T1, respectively, and one end of the body 1 extends over the end surface and both side surfaces of the body 1 so as to correspond to the terminals T1 and T2. The insertion portions 209a to 209c that are open at the end are formed.

Further, a pair of electric wire insertion holes 16A, 16B opened obliquely upward are formed in parallel at one end of the body 1.

Further, on the lower end faces of the wire insertion holes 16A, 16B, there are fixed contacts 2B arranged in the inner and lower compartments of the two compartments divided by the side walls of both cases 1A, 1B and the intermediate case 7. An exhaust hole 109 for exhausting gas generated by opening and closing the movable contact 3A and a locking hole 112 for mounting the body are opened, and the upper surface of the other end of the body 1 is arranged in the upper section. An exhaust hole 11 for exhausting gas generated by opening and closing the fixed contact 2A and the movable contact 3A obliquely upward.
0 opens.

Since both the exhaust holes 109 and 110 are vertically separated, and the directions facing the outside of the body 1 are separated from each other, the discharge directions of the arcs generated during forced opening are different from each other, and the arcs of both poles are different from each other. It is possible to prevent a short circuit between the electrodes due to the mixture. Here, the exhaust hole 110 includes a rising rib 113 at the tip of the intermediate case 7 and ribs 114 and 114 protruding to the side surfaces of the release levers 17 and 17 '.
Also, since the laterally protruding wall 115 facing the opening of the exhaust hole 110 of the cases 1A and 1B guides the exhaust gas obliquely upward,
It is difficult to intersect with the exhaust gas exhausted from the exhaust hole 109 below.

Then, the load side electric wires are inserted into the electric wire insertion holes 16A and 16B and connected to the respective terminal blocks 10A and 10B, and the conductive bar L3 is connected to the common terminal T1 in the width direction via the insertion portion 209c. The circuit breaker of the present embodiment can be inserted into the electric path by plugging and connecting the conductive bar L1 or L2 to the selection terminal T2 through the plug-in portion 209a or 209b in the width direction.

Next, the operation of this embodiment will be described with reference to FIGS.
Will be described.

FIG. 21 shows an off state. In this off state, the operating portion 6a of the handle 6 is exposed upside down through the opening 50, and the one end of the operating plate 43 and the first tripping plate 41 are engaged with each other. The combined state is in a disengaged state. The cross bar 40 is biased by the coil spring 62 so as to rotate clockwise in the figure, and the movable contact 4A inserted into the cut groove 54 of the cross bar 40 moves the free end upward. The movable contact 4B inserted into the cut groove 55 has its free end moved upward by its spring elastic force, and the movable contacts 3A and 3B provided at the respective free ends are It is in a state of being separated from the corresponding fixed contacts 2A and 2B.

When the operating portion 6a of the handle 6 is rotated clockwise in this state, the upper shaft 44a of the link 44 is pushed downward and the link 44 pushes down the operating plate 43 by the lower shaft 44b. By pushing down the operating plate 43, one end (the right end in the drawing) of the operating plate 43 hits the locking portion 57 of the first tripping plate 41, and the operating plate 43 rotates counterclockwise around that position as a rotation center. The other end (left end) of the operating plate 43 hits a protrusion 84 provided on the upper end of the crossbar 40 as shown in FIG. 22, and rotates the crossbar 40 counterclockwise against the spring bias.

By this rotation, the cut groove 55 of the crossbar 40 is formed.
The movable contactor 4B inserted into the flexible contact 4B is bent in the direction of moving the free end downward, and the movable contact 3B at the free end is brought into contact with the fixed contact 2B. Further, the movable contactor 4A inserted into the cut groove 54 rotates counterclockwise to bring the movable contact 3A at its free end into contact with the fixed contact 3B. This contact is delayed from the contact of the movable contact 3B with the fixed contact 2B.

Since the movable contactor 4B obtains contact pressure by its own elasticity, no spring means for contact pressure is required, and since it is not necessary to connect the electric path by using a braided wire, parts are incorporated. No work or braided wire connection work is required, improving productivity.

When the handle 6 is further rotated clockwise, the position of the lower shaft 44b of the link 44 and the handle 6 are rotated.
The upper shaft 44a moves to the left as shown in FIG. 23 from the line connecting the center of rotation of the handle 6, and in this state, the torsion spring 51 of the handle 6 and the coil spring 62 for biasing the crossbar 44,
Further, the spring force or the like of the movable contactor 4B is balanced and the latched state between the one end of the actuating plate 43 and the locking portion 57 of the first trip plate 41 is maintained, and the ON state of FIG. 23 is maintained. FIG. 24 shows the ON state with the trip plates 41 and 42 removed.

When the operating portion 6a of the handle 6 is turned counterclockwise in the ON state, the upper shaft 44a of the link 44 is rotated.
Is moved in the right direction beyond the line connecting the rotation center of the handle 6 and the lower shaft 44b, and moves upward, so that the left end of the operating plate 43 and the locking portion 57 of the first trip plate 41 are latched. The crossbar 40 is rotated clockwise by the biasing force of the coil spring 62, and the handle 6 is rapidly rotated back to the off side by the biasing force of the torsion spring 51. When the crossbar 40 is rotated clockwise, the movable contactor 4A is rotated clockwise to move the free end upward so that the movable contact 3A is separated from the fixed contact 2A. Further, the downward movement of the movable contactor 4B disappears, and the spring force restores the original state, so that the movable contact 3B at the free end is separated from the fixed contact 2B. This separation is delayed compared with the separation of the movable contact 3A from the fixed contact 2A. This delay is the same as in the forced opening described later.

Since the opening and closing of the contact portions of both poles are delayed as described above, the arc generated when the contacts are opened and closed is only the movable contact 4A on the rigid body side, and the movable contact made of a spring material. It is possible to prevent consumption due to the 3B arc.

Further, the arcs generated at the contact portions of both poles are generated in the respective arrangement sections, and since the exhaust directions of the exhaust holes 109 and 110 are different, the inter-electrode short circuit due to the arc can be prevented.

Further, the stoppers 130 ... Formed in both the cases 1A and 1B and the intermediate case 7 are inserted into the concave grooves 131 formed in the width direction of the tip end surface of the crossbar 40 which rotates when the contact portions are opened. Since it abuts on the bottom of the concave groove 131, there is no risk that the arc generated in one compartment will sneak from the crossbar 40 side on the back side of the body 1 and enter the other compartment, and the arc inside the body 1 will be eliminated. Prevent short circuit between electrodes.

Further, the fixed contact 2 of the upper fixed contact 12A
The space near A is widened to the space between the side walls of both cases 1A and 1B by the bulging portion 30 of the intermediate case 7, and the space near the fixed contact 2B of the lower fixed contactor 12B is formed between both cases 1A and 1B. Since it is a wide space between the side walls,
It is possible to reduce the gas pressure due to the arc generated when the respective contact parts are separated, and it is possible to prevent cracks and breakage of both cases 1A and 1B due to the gas pressure.

Further, since the intermediate case 7 is formed of a resin material containing Mg hydroxide, it is possible to oxidize carbon generated when the contact portion is opened and prevent insulation deterioration due to carbon.

Now, in the ON state shown in FIG. 23,
When an overcurrent flows through the load, the bimetals 45 and 46 generate heat due to the overcurrent and are curvedly displaced. Here, the bimetal 45 hung from above is displaced so that the lower end moves leftward in the figure, and the bimetal 46 erected upright.
24 is displaced so that the upper end moves to the right, the lower end of the bimetal 45 pushes the first drive portion 69 of the first tripping plate 41 leftward, and the upper end of the bimetal 46 moves to the second pull, as shown in FIG. The second drive unit 70 of the removal plate 42 is pushed to the right.
That is, the free ends of both bimetals 45 and 46 are displaced in the direction away from each other. Due to this displacement, the first and second tripping plates 4
1, 42 rotate clockwise, but at this time, the facing portion 42a of the second tripping plate 42 pushes the receiving portion 59 of the first tripping plate 41 to apply a clockwise turning force to the first tripping plate 41. give.

Since the bimetals 45 and 46 are energized in opposite directions to each other, when a large current flows, magnetic forces are generated in the bimetals 45 and 46 in directions away from each other. Therefore, the curved displacement of the bimetals 45 and 46 can be made quick, and as a result, forced opening can be made faster. This operation is also effective during forced opening due to a short-circuit current, which will be described later.

When the first tripping plate 41 is rotated clockwise, the latched state between the locking portion 57 and one end (right end) of the operating plate 43 is released, and the operating plate 43 moves the lower shaft 44b of the link 44. It will rotate clockwise around. Therefore, the other end (left end) of the operating plate 43 causes the crossbar 40 to move.
25, the crossbar 40 is rotated clockwise by the spring force of the coil spring to return the movable contacts 4A, 4B to the off state as shown in FIG.
3B is separated from the fixed contacts 2A and 2B, respectively.

After that, the bimetals 45, 4 are cut off by disconnecting the electric circuit.
6 returns to the original state, the first tripping plate 41 is returned to the original position by the biasing force of the torsion spring 60, and at the same time, the receiving portion 59 pushes and moves the facing portion 42a of the second tripping plate 42. The second trip plate 42 is returned to its original position. Further, the handle 6 is rotated in the OFF direction (counterclockwise direction) by the bias of the torsion spring 51.

In the ON state, when an excessive current such as a short circuit current flows, a magnetic force is generated in the fixed iron cores 74 and 74 'of the electromagnetic drive units 47 and 48, and the corresponding movable iron core 5 is generated.
8 and 67 are sucked and rocked. As a result, as shown in FIG. 26, the drive portion 58a of the movable iron core 58 pushes the receiving portion 89 of the first trip plate 41, and the drive portion 67a of the movable iron core 67 pushes the receiving portion 68 of the trip plate 42, respectively. Rotate clockwise. The same as when the overcurrent flows
When the trip plate 41 rotates clockwise, the latched state between the locking portion 57 and one end (right end) of the operating plate 43 is released,
The operating plate 43 rotates clockwise about the lower shaft 44b of the link 44. Therefore, the regulation of the crossbar 40 by the other end (left end) of the operating plate 43 is eliminated, the crossbar 40 is rotated clockwise by the spring force of the coil spring 62, and the movable contacts 4A and 4B are returned to the off state. The movable contacts 3A and 3B are separated from the fixed contacts 2A and 2B, respectively.

Thereafter, the electromagnetic circuits 47, 4
When the magnetic force is not generated in the fixed iron cores 74, 74 'of No. 8,
The movable iron cores 58 and 67 return to their original state by the spring force of the leaf springs, and the first tripping plate 41 returns to its original position by the biasing force of the torsion spring 60, and at the same time pushes the second tripping plate 44. Move it back. The handle 6 is a torsion spring 5
The urging force of 1 causes rotation in the off direction (counterclockwise direction).

Here, each fixed iron core 7 of the movable iron cores 58 and 67 is
Since the electromagnetic drive units 47 and 48 are arranged so that the directions of attraction to the magnets 4, 74 'are opposite to each other, even if vibration is applied, one of the movable iron cores 58 and 67 is attracted by the vibration. Since the other moves in the direction of anti-suction, the force for rotating the first and second tripping plates 41, 42 in the latch tripping direction is obtained only by the movement of one of the movable iron cores, and therefore the twisting First against the biasing force of the spring 60
It is not possible to obtain the force for pulling off the trip plate 41, and as a result, malfunction due to vibration can be prevented.

By the way, as shown in FIG. 27, an inverted L-shaped projection 85 is provided at the upper end of the crossbar 40 so as to face the projection 84, and the lower end of the link 44 is attached to the tip of the projection 85 in the ON state. When the contact portion is arc-welded due to the engagement of 44b, the crossbar 40 does not move even if the handle 6 is operated to the off side. Therefore, when the off operation is released, the handle 6 returns to the on position. This allows the user to know the welding of the contact portion.

[0106]

According to the invention of claim 1, three inserting portions for inserting the three conductive bars arranged in the upper, middle and lower three stages from the width direction are provided at one end in the vertical direction. The formed body and the bottommost insertion of the three insertion portions on one side of the formation
It is disposed so as to correspond to part 1 of the previous SL three conductive bars
One common terminal for inserting and connecting books, and one selection terminal arranged on one side of the body for selecting and selecting one of the remaining two conductive bars for insertion and connection. In the circuit breaker provided, an inner storage portion is provided inside the body by communicating with the two insertion portions corresponding to the remaining two conductive bars, and the remaining inner storage portion is provided in the inner storage portion . between at least two positions corresponding to the two conductive bars, slides by operation from the outside of the device body holds the selected terminal
Install a slide member to move the
Since a through hole communicating with the inner storage portion is provided , the selection terminal located at a position corresponding to one of the remaining two conductive bars is removed from the body to remove the remaining two conductive bars. It is not necessary to switch to the position corresponding to the other one, and it is possible to easily connect selectively to one of the two conductive bars, and one conductive bar is connected to each of the common terminal and the select terminal. Since only two conductive bars are connected, it is possible to reduce the insertion force for inserting and connecting the conductive bars. Furthermore, since there is only one selection terminal, this selection terminal is moved, so It is possible to reliably connect only one of the two conductive bars, and it is possible to reduce the number of parts and reduce the cost. In addition,
By arranging the ride member, the selection terminal can be connected to two conductors.
Can be easily moved between the positions corresponding to the electric bar
Has the effect of Furthermore, by providing a through hole
When you look through the through hole from the top side of the body, the selection terminal
You can easily determine whether it is on the insertion side, especially on the top side of the body
Since it can be determined from the above, a circuit breaker is installed in the distribution board.
Sometimes the through hole is located on the front side, so
It can be identified without removing the circuit breaker, and
The through hole when the door member is in the upper part of the two insertion parts
If the slide member is suppressed by inserting the jig from the
There is an effect that it can be moved to the recessed part side.

[0107]

[0108]

[0109]

[0110]

According to a second aspect of the present invention, in the first aspect of the invention, a slide member is provided on both sides of the inner surface of the inner storage portion, extending downward from above the container and engaging side portions of the slide member. Since the guide means for guiding the sliding movement in the up and down direction is provided, the slide member can be moved straight in the up and down direction by the guide means, and the alignment of the conductive bar in the selection terminal on the insertion tip side can be facilitated. effective.

According to a third aspect of the present invention, in the first or second aspect of the present invention, at least one side surface of the slide member is provided with a protrusion protruding outward, and at least one side surface of the container body is provided with the slide portion. Since the guide portion is formed so that the projecting portion is inserted into the outside while the member is positioned between the upper inserting portion and the lower inserting portion, it is possible to operate the projecting portion along the guide portion from the outside. There is an effect that the slide member can be moved between the upper and lower insertion portions.

According to a fourth aspect of the present invention, in the third aspect of the invention, the protruding portion of the slide member is formed at the tip of a leg piece extending below the position of the selection terminal, and the guide portion is Since it has a guide groove extending upward from the bottom surface of the body and an insertion hole for the protrusion and the leg piece formed at the uppermost part of the guide groove, a hole extending vertically in the side surface of the body. There is no need to wear a sword, and the appearance is improved.

[Brief description of drawings]

FIG. 1 (a) is a side view of a first side case in which a part thereof can be omitted, showing an example of use of an embodiment of the present invention. (B) is another side view which can omit a part of 1st side case which shows one usage example same as the above.

FIG. 2A is a side view of the first side case, which is partially omitted, showing another usage example of the embodiment of the present invention. (B)
[Fig. 7] is another side view of the first side case, in which a part thereof can be omitted, showing another example of use of the above.

FIG. 3 is an exploded perspective view showing the relationship between the slide member and the selection terminal of the above.

FIG. 4 is a slide member same as above, a first side case and a second side case;
It is a disassembled perspective view which abbreviate | omits a part which shows the relationship with a side case.

FIG. 5 is an exploded perspective view of the above.

FIG. 6 is an enlarged perspective view of the intermediate case of the above.

FIG. 7 is an enlarged exploded perspective view in which a part of the above-mentioned crossbar portion can be omitted.

FIG. 8 is an exploded perspective view of structural portions of the lower electromagnetic drive unit and the lower bimetal of the above.

FIG. 9 is a perspective view of structural portions of the upper electromagnetic drive unit and the upper bimetal of the above.

FIG. 10 is an exploded perspective view of structural portions of the upper electromagnetic drive unit and the upper bimetal of the above.

FIG. 11 is an explanatory diagram of the adjustment of the above bimetal.

FIG. 12 is a perspective view of structural portions of the lower electromagnetic drive unit and the lower bimetal of the same.

FIG. 13 is a side view of the above.

FIG. 14 is a rear view of the above.

FIG. 15 is a perspective view of the above.

16 is a sectional view taken along line AA of FIG. 13 of the above.

17 is a sectional view taken along line BB of FIG. 13 above.

FIG. 18 is a top view of the above.

FIG. 19 is a bottom view of the above.

FIG. 20 is a side view of the above-mentioned first side case in a member assembled state.

FIG. 21 is a state explanatory view of the above-mentioned off state.

FIG. 22 is a state explanatory view in the middle of transition to the ON state of the above.

FIG. 23 is an explanatory diagram of the above-described ON state.

FIG. 24 is an on-state explanatory view showing a state in which the trip plate is removed.

FIG. 25 is a state explanatory view of a trip operation due to an overcurrent in the above.

FIG. 26 is a state explanatory diagram of an instantaneous interruption state due to an excessive current in the above.

FIG. 27 is a perspective view showing a relationship between the above-mentioned crossbar and a link of a handle.

[Explanation of symbols]

1 body 1A First side case 83 Slide member 90 Storage 200 inward storage 204 guide groove T1 common terminal T2 selection terminal L1 to L3 conductive bars

Front page continued (72) Inventor Takashi Inagi, 1048 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Toshihiro Oido, 1048, Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) Invention Person Takanobu Tanaka 1048 Kadoma, Kadoma City, Osaka Prefecture, Matsushita Electric Works Co., Ltd. (72) Inventor, Hatsuo Mizuno, Kadoma City, Osaka Prefecture 1048 Kadoma, Matsushita Electric Works Co., Ltd. (72) Yoshiya Nakamichi, Kadoma City, Osaka Prefecture Kadoma 1048, Matsushita Electric Works Co., Ltd. (56) Reference Japanese Unexamined Patent Publication No. 10-241540 (JP, A) European Patent Application Publication 229590 (EP, A 1) (58) Fields investigated (Int.Cl. ⁷ , DB name) ) H01H 73/20 H01H 71/08

Claims (4)

(57) [Claims] 1. A container body in which three inserting portions for inserting three conductive bars arranged in three stages of upper, middle and lower from the width direction are vertically formed at one end portion, wherein on one side of該器body
Three 1 bayonet connecting one of the in correspondence disposed <br/> are pre SL three conductive bars inserted portion of the lowermost of the insertion portion
One common terminal and one of the remaining two conductive bars disposed on one side of the body are selected and connected by insertion 1
A circuit breaker having two selection terminals, and an inner storage portion is provided inside the body by communicating with two insertion portions corresponding to the remaining two conductive bars. the portion, the among the remaining two least two positions corresponding to the conductive bar, and holding the selected terminal
Sliding by operating from the outside of the body
A slide member is installed so that the inside
A circuit breaker characterized by having a through hole communicating with the storage section . 2. The body is provided on both sides of an inner surface of the inner storage portion.
Of the slide member extending downward from above to engage the side portion of the slide member
To guide the sliding movement of the slide member in the vertical direction.
2. The circuit breaker according to claim 1, further comprising guide means. 3. The at least one side of the slide member
The surface is provided with a protrusion that protrudes to the outside,
On the side surface on one side, the slide member is the uppermost insertion part.
To the middle of the insertion part,
The circuit breaker according to claim 1 or 2, wherein a guide portion is formed to be inserted into the portion . 4. The protruding portion of the slide member is a selection terminal.
Is formed at the tip of the leg that extends below the position
The guide part has a guide groove that extends upward from the bottom of the body.
The protrusion and the leg formed at the uppermost part of the guide groove
4. The circuit breaker according to claim 3 , wherein the circuit breaker has a through hole for one piece .