JP2003178665A - Circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker capable of making a body in the width direction compact. <P>SOLUTION: The body 1 is composed of first and second side cases 1A, 1B, houses a quick connection terminal comprising locking springs 13A, 13B and terminal plates 11, 11 on the inside at one end, and has blade receiving spring parts 78, 81 at the other end, and fixed contacts 2A, 2B and moving contacts 3A, 3B opening and closing an electric circuit between blade receiving spring parts 78, 81 having the same polarity and the quick connection terminal, and an opening and closing mechanism 5 are installed on the inside, and an operation part 6a of a handle 6 is exposed from one surface in the direction perpendicularly crossing to the length direction. Electric wire insertion holes 16A, 16B are installed in a middle case 7 interposed between the first and second side cases 1A, 1B and on end surfaces between the first and second side cases 1A, 1B on the other side of the body 1, and the quick connection terminal is arranged in the middle case and between the side cases 1A, 1B. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention
A two-pole type circuit breaker that opens and closes two-pole contacts
You. [0002] In this type of circuit breaker, two types of circuit breakers are used.
Fixed contacts are arranged side by side in the width direction of the body to separate each contact.
Are bifurcated, but in this case, between two fixed contacts
It is necessary to increase the insulation interval of the
However, there is a problem that the size of the device increases. Therefore, this application
A person has proposed a circuit breaker as shown in Patent Document 1.
You. This device has two fixed contacts arranged in the height direction of the body.
The width of the body can be reduced.
are doing. [Patent Document 1] Japanese Patent Application Laid-Open No. 5-47291. [0004] The circuit breaker described above
The fixed contacts are arranged side by side in the height direction of the body.
Can reduce the width of the body, but this time
There is a problem that the height dimension is increased. In this type of circuit breaker, the height of the body is high.
There are two fixed contacts arranged side by side in the vertical direction. The present invention has been made in view of such circumstances.
The purpose is to make the body more compact.
And the wires can be connected quickly, and the power supply side
A connection that can be connected by inserting the power bar
It is intended to provide a road circuit breaker. [0007] According to the first aspect of the present invention,
The first and second side cases are butt-coupled to each other.
At the end, insert a conductive bar with a U-shaped opening on the end face and both side faces.
Insertion groove is formed and wire insertion hole is parallel to the other end
The formed body, and housed and arranged inside one end of the body
The conductive bar inserted from the conductive bar insertion groove is vertically
Two-pole blade receiving spring part to be sandwiched between
And lock the core of the electric wire inserted from each of the electric wire insertion holes.
A two-pole quick-connecting terminal that is connected to the terminal board by pressing it with one
A fixed member interposed in an electric path between the blade receiving spring portion and the quick-connecting terminal.
A constant contact and a movable contact, and the movable contact is connected to the fixed contact.
An opening / closing mechanism for separating, and a window formed in the upper surface of the container
And the movable contact through the opening / closing mechanism.
And a handle for connecting and disconnecting the fixed contact to and from the fixed contact.
A gap sandwiched between the first and second side cases at the end side
An end between the partition member and each of the side cases.
The wire insertion hole is formed in each of the
That the quick-connecting terminal is placed between the material and each side case
It is characterized by. FIG. 1 to FIG. 19 show the present invention.
This will be described with reference to one embodiment. FIG. 3 shows a circuit breaker according to this embodiment.
The first side case 1A made of synthetic resin and the second side case
The container 1 is formed by butt-connecting
Two fixed contacts 2A and 2B arranged side by side in the width direction of the body 1
And these fixed contacts 2A and 2B are opposed to each other so as to be able to freely contact and separate.
Two movable contacts 4A, to which the movable contacts 3A and 3B are fixed,
4B and these two movable contacts 4A and 4B are driven.
Opening / closing mechanism 5 for turning on / off the handle 6
The movable contacts 3A and 3B are fixedly connected to each other via the opening / closing mechanism 5.
It is configured to contact and separate from the points 2A and 2B.
The points 2A and 2B and the movable contacts 4A and 4B are
The two movable contacts 4A,
4B, between the two fixed contacts 2A and 2B in the height direction.
Existing one movable contact 4B and the other movable contact 4A
The fixed contact 2A with which the movable contact 2A of the
The state where the movable contacts 3A and 3B are separated from the points 2A and 2B.
At a height that does not intersect when viewed from the width direction of body 1.
It is. In one end of the body 1, both cases 1A, 1B are provided.
Alkaline earth metal hydroxide (such as sandwiched between
For example, a barrier formed from a synthetic resin material containing Mg hydroxide)
A wall member (hereinafter referred to as an intermediate case) 7 is provided,
The recess 8 inside the side wall (outer wall) of the first side case 1A
Fixed contact 2 in the section constituted by the vertical wall portion 35 of the base 7.
A at one end is a terminal block as a first fixed-side electric circuit configuration.
And the second case 1B side of the intermediate case 7
And the side wall (outer wall) of the second side case 1B.
The lower fixed contact 2B is provided at one end in the section configured
The terminal block 10B serving as the second fixed-side electric circuit configuration is housed therein.
It is. The terminal block 10A is bent in a U shape.
Terminal plate 11 and one end of the lower piece of the terminal plate 11 above one end.
The extension piece 11a is integrally extended from the upper end of the extension piece 11a.
bent at a right angle to a and outward to the terminal plate 11
A fixed contact 12A that is integrally extended;
A fixed contact 2A fixed to the upper surface of one end of
It is placed on the lower piece of the plate 11 and housed in the terminal plate 11
A lock spring 13A having a substantially M-shape,
Terminal board 11 on the downwardly inclined bottom surface of the recess 8 of the base 1A.
On the rising wall 8a at one end of the recess 8
The extension piece 11a so that the upper end of the rising wall 8a
The fixed contact 12A is led out of the recess 8 beyond
The rising wall 8a rises from the bottom of the first side case 1A.
In the same manner as the bottom of the recess 8 between
The fixed contact 12A is placed on the integrally formed fixed contact placement portion 15.
The terminal block 10A is recessed.
It is arranged in the section 8 as shown in FIG. Fixed contact arrangement
The fixed contact protruding from the lower surface of the fixed contact 12A
A concave portion 15a for allowing the lower end of the point 2A to escape is formed. end
The sub-plate 11 has a T-shaped piece 11b integrated upward from the other end of the upper piece.
The T-shaped piece 11b has a side projection at the upper end thereof.
One end of the protrusion is formed on the inner surface of the first side case 1A.
It is placed on the upper end surface of a certain convex flat part 22. In addition, the terminal plate 11
The side of the side piece is inserted into the holding piece 13b of the locking spring 13A.
Projection 23 for preventing the locking spring 13A from rattling.
Are integrally formed. The lock spring 13A and the terminal plate 11 are connected to a conductor connection portion.
It constitutes a quick-connecting terminal and is connected to the first side case 1A.
When the intermediate case 7 is overlapped, the first side case 1A
Oblique downward groove with a semicircular cross section formed in the vertical wall at the other end
160 and the wall formed on the opposite wall surface of the intermediate case 7
The obliquely downward electric current formed by the obliquely downwardly extending groove 160
Electric wire 111 inserted from outside through wire insertion hole 16A
(See FIG. 7) The core wire of the terminal plate 11 and the locking spring 13
Between the upper end of the lock piece 13a of A and the upper end of the holding piece 13b
And the wire 111 is pulled by the tip of the locking piece 13a.
The core wire is locked in the pulling-out direction and the pressing piece 13b is locked.
The core wire is pressed against the upper piece of the terminal board 11 at the upper end face.
To electrically connect the core wire and mechanically hold it.
It has become. It is necessary to release this wire lock.
This release handle 17 is provided on the lower side surface with the handle 17
The rotating shaft 18 is fitted to the convex flat portion 22 on the inner surface of the first side case 1A.
The intermediate case 7 is rotatably supported by the provided shaft hole 20.
The shaft 36 projecting from the wall surface of the vertical wall portion 35 of the
19 is rotatably supported by a concave portion 37 provided on the surface.
, The operation unit 17a exposed to the outside of the
When the drive is turned counterclockwise, the drive
The moving projection 19 is provided at one end of the locking piece 13a of the locking spring 13A.
Press the tip to bend the locking piece 13a and lock the core wire.
Can be canceled. 21 in the figure
When the release handle 17 is constantly rotated clockwise and returned,
It is. The terminal block 10B basically has terminals
As with the block 10A, the terminal plate 11 and the locking spring 13B
And the fixed contact 12B.
Unlike the terminal plate 11 of the terminal block 10A, the terminal block 10
B terminal plate 11 extends downward from one end of the lower piece.
1c is extended, and the body 1 is extended from the tip of the extension piece 11c.
The fixed contact 12B is extended so that it is parallel to the bottom of the
And extend at right angles from one end of the side piece of the terminal plate 11.
11d is formed. The lock spring 13B is the same as the lock spring 13A.
Of a structure, placed on the lower piece of the terminal plate 11,
The protrusion 23 protruding from the side piece of the terminal plate 11 is
3b. The terminal block 10B is
Constructs the bottom of recess 9 and extends substantially parallel to the bottom of vessel 1
When the lower piece of the terminal plate 11 is placed on the
Then, the back piece 11d follows the vertical wall 25 at one end of the concave portion 9.
Between the lower end of the vertical wall 25 and one end of the horizontal wall 24
Insert one end of the terminal plate 11 into the notch 27 formed in
The piece 11c is put out of the recess 9 so that the intermediate cable
When the contact 7 is overlaid on the first side case 1A side,
The tip of the contactor 12B, that is, the lower surface on which the fixed contact 2B is provided,
It is placed on the ribs 26 at the bottom of the first side case 1A.
It has become so. That is, the fixed contact 2B is an intermediate case
7 and the later-described bulging portion 30 and both cases 1
A case 1A, 1B in the space formed between the side walls of A, 1B.
It is arranged across B. The recess between the ribs 26, 26
Fixed contact 2 fixed by caulking to the tip of fixed contact 12B
Escape at the lower end protruding to the lower surface side of the fixed contact 12B of B
It becomes. Further, information is transmitted from the other end of the upper piece of the terminal plate 11 to the information.
The tip of the lateral protrusion at the upper end of the T-piece 11b formed to be extended
Above the convex flat portion 22 ′ formed on the wall surface of the intermediate case 7
It is placed on the end face. The locking spring 13B and the end of the terminal block 10B
Sub-plate 11 is connected to conductors as in terminal block 10A.
And the intermediate cable is connected to the second side case 1B.
When the top 7 is overlaid, the recess 9 of the intermediate case 7
An obliquely downward groove 1 having a semicircular cross section provided in a vertical wall portion at an end.
60 and the diagonally downward groove 160 as well as the second side case 1
B with the diagonally downward groove 160 provided in the vertical wall at the other end of B
When an electric wire is inserted from the formed electric wire insertion hole 16B,
Is locked with the locking piece 13a of the locking spring 13B and pressed.
Press the core wire against the upper piece of the terminal board 11 with the
To be electrically connected and mechanically locked.
ing. The release handle is used to release the wire lock.
17 ', the release handle 17' is
A rotating shaft 18 provided on the lower side surface in the same manner as the
The shaft 7 is rotatably supported in a shaft hole 20 provided in the convex flat portion 22 ′ of the screw 7.
And protrudes from the inner wall surface of the second side case 1B.
A shaft 38 is rotatably supported in a concave portion 37 formed on the side surface.
Then, the operation unit 17a exposed outside the body 1 is manually operated.
When the drive projection 19 provided on the lower end is locked when
Press the tip of one end of the lock 13a of the lock 13B to lock the lock.
13a can be bent to release the locked state
It has become. In the figure, 21 'is always the release handle 17'
This is a return spring that urges clockwise rotation. The intermediate case 7 has two casings as shown in FIG.
The vertical wall portion 35 substantially parallel to the side walls of the
Inside the side wall of the second side case 1B protruding toward the second side case 1B
A bulging portion 30 is formed in contact with the surface, and the lower surface of the bulging portion 30 is formed.
The vertically suspended wall is the vertical wall 25, and the second side case
A side wall facing the 1B side, a bottom wall 31, a vertical wall 32 at one end,
The recess 34 surrounded by the ceiling wall 33 is located on the first side case 1A side.
It is provided in. And an intermediate case is attached to the first side case 1A side.
Attach 7 to the first side case 1A side when butting 7
Tip side of fixed contact 12A of certain terminal block 10A
Is placed on the step surface 31a of the bottom wall 31 of the recess 34, and
The ceiling wall 33 protrudes from the inner side surface of the first side case 1A.
Is arranged along the lower surface of the horizontal wall 29. On the step surface 31a
Is a fixed contact 2 fixed by caulking to the fixed contact 12A.
A groove 31b for allowing the lower end of A to escape is formed. Also vertical wall
32 has a movable contact 4A corresponding to the fixed contact 2A.
Forming an opening 39 for inserting the end into the recess 34
is there. The movable contacts 4A and 4B are driven to open and close.
The opening / closing mechanism 5 includes an operating plate 43 serving as a latch member and a crossbar.
And a stepped locking portion 5 for locking one end of the operation plate 43.
7 and a second tripping plate 42
, An operating plate 43 serving as a latch member, a handle 6,
Link 44, etc., in addition to these when an overcurrent is detected
Two bimetals 45 and 46 for driving the opening and closing mechanism 5
Further, an electromagnetic driving the switching mechanism 5 when a short-circuit current flows.
The driving parts 47 and 48 are added to form a common part. The handle 6 includes an operating portion 6a, a rotating portion 6b,
It is composed of a handle shaft 6c and both sides of the rotating portion 6b.
The handle shaft 6c protruding to the center is placed inside the first side case 1A.
Hole 49 formed in the surface and the inner surface of the second side case 1B
Into the shaft hole 49 formed in the
The operation unit 6a is held between the cases 1A and 1B,
1A and 1B are superimposed and connected
So as to face the opening 50 that opens on the upper surface of the container 1
I have. A torsion spring 51 is attached to the handle shaft 6c.
The handle 6 is turned on by the torsion spring 51.
(See FIG. 22).
I have. The shaft hole 52 provided at the lower end of the rotating portion 6b is
The upper shaft 44a of the link 44 is rotatably inserted into the
It is connected to the operation plate 43 via 44. The operating plate 43 has bearing holes 4 provided on both sides of the center.
3a through the lower shaft 44b of the link 44.
Connected to the handle 6 via the link 44, and
It is arranged to be able to move up and down. The cross bar 40 is projected from both upper side surfaces.
Shaft 40a formed on the inner surface of both cases 1A and 1B.
Insert into the holes 52, 52 and pivot between the two cases 1A, 1B.
And slightly below the shaft 40a as shown in FIG.
The side of the movable contact 4A is located on the side of the first side case 1A.
And the lower second side casing
The movable contact 4B is fitted to the side of the screw 1B from the lateral direction.
Each of the cut grooves 55 is provided. And on the movable contact side end face
Are the inner surfaces of the intermediate case 7 and the side walls of the two cases 1A and 1B.
Of the movable contacts 3A, 3B
Are engaged with the fixed contacts 2A, 2B in a state where they are separated from each other.
A concave groove 131 is formed in the width direction to be in contact with the bottom of. The movable contact 4A is a rigid conductive metal plate.
And inserted into the cut groove 54 of the crossbar 40 from the side.
And a recess 54 provided behind the incision 54.
a, a pressure is applied between the lower surface of the rear portion and the bottom of the concave portion 54a.
The rear part is lifted up by the coil spring 53 for contact pressure that is contracted and arranged.
And the crossbar 40 is
When the movable contact 4A rotates about the center 0a, the movable contact 4A
Rotates around the opening edge of 54 and caulks to the free end
Movable contact 3A separated from corresponding fixed contact 2A
・ It is designed to make contact. The movable contact 4B is made of a conductive spring thin plate.
And the crossbar 40 is turned counterclockwise in FIG.
When rotated, it is pushed downward and bends, this bent state
When the crossbar 40 rotates clockwise from
The movable and crimped to the tip by its bending and return
The contact 3B is brought into contact with and separated from the fixed contact 2B.
It has become. The lower end of the crossbar 40 is
Between the wall 63 suspended from the bottom of the first side case 1A
As shown in FIG.
In this case, a clockwise rotational force is applied. The first release plate 41 includes a shaft portion 41a and the shaft portion 41a.
A projecting portion 41b projecting above the shaft portion 41a;
a near the second side case 1B side of FIG.
The side piece 41c having
The arm portion 41d is integrally formed at the end of the shaft portion 41a.
Shaft holes provided on both inner surfaces of both cases 1A and 1B
56, 56 and freely rotatable between both cases 1A, 1B
The operation plate is provided on the upper end of the projection 41b.
Locking portion 57 with which one end (right end in FIG. 19) of 43 is disengaged
And an electromagnetic drive unit 47 on the upper end of the arm piece 41d.
Receiving part 88 pushed and driven by driving part 58a of moving core 58
Are formed respectively. The second side below the side piece 41c
On the side of the case 1B, the lower end of the second tripping plate 42
Receiving part 5 pushed and moved by opposed part 42a provided on the surface
9 is formed on the side surface of the receiving portion 59 on the shaft portion 41a.
Locking portion 6 for locking both ends of torsion spring 60 for fitting the ring portion
1 is provided. In addition, the first side cable below the side piece 41c
A conductive plate fixedly holding the electromagnetic driving section 47
Facing the lower end of the bimetal 45 suspended from
The first driving unit 69 pressed at the time of bending displacement of the metal 45
It is provided. The second release plate 42 has a central shaft hole 42b.
Above the first side case 1A on the inner surface of the first side case 1A
Separation as a partition formed integrally from the vicinity to the bottom
Insert the shaft 66 provided at the center of the end face of the wall 65
Since it is pivotally supported between both cases 1A and 1B,
An electromagnetic drive unit 4 is provided on the lower end surface on the opposite side of the above-described facing unit 42a.
8 is driven by the driving portion 67a of the movable iron core 67.
A part 68 is provided. Also, the upper end of the second release plate 42
An electromagnetic drive unit 48 is fixed to the side surface of the first side case 1A.
Bimetal 4 suspended from the rear end of movable contact 4B
6 and pressed when the bimetal 46 is bent
A second driving unit 70 is provided. A conductive plate 71 made of a thin metal material is shown in FIG.
As shown, it is formed by being bent in an inverted L shape.
The electromagnetic driving part 47 is fixed to the outer piece 71a, and the outer piece 71a
Folded in a U-shape from the tip of
The upper end of the bimetal 45 is inverted L
Weld and fix the horizontal piece of the shape part and let the bimetal 45 hang down
is there. As shown in FIG.
Steel plate is bent upside down and both ends of the vertical piece are bent at right angles
The fixed core 74 has a horizontal U-shape when bent.
Moving core 58 and movable core 58 are fixed at both ends of fixed core 74.
And a leaf spring 73 for swingably opposing the surface.
And is integrally formed at right angles with the fixed iron core 74.
The flat plate 75 consisting of a horizontal piece is formed of an outer piece 71a and an inner piece 71b.
Between the notches 7 at the center of both sides of the flat plate 75.
The inverted T which is suspended from the center of both side edges of the outer piece 71a at 5a
The fixed iron core 74 is moved to the position shown in FIG.
As shown in FIG. The movable iron core 58 protrudes from the surface on the fixed iron core 74 side.
The projections 58b, 58b are attached to the central piece 73a of the leaf spring 73.
And inserted into holes 73b, 73b formed at the upper end of
By being fixed, it is swingably supported by the leaf spring 73.
The ridge 73 is formed by bending both sides of the central piece 73a.
Pieces 73c, 73c are attached to both sides 74a, 74 of the fixed iron core 74.
a so as to be along the outer surface of a.
locking pieces 73d, 73d protruding inward at the tip of c
Are formed at the outer corners of the fixed iron core 74.
4b, it is fixed to the fixed iron core 74.
You. The ends of both side pieces 74a, 74a of the fixed iron core 74
The magnetic pole faces at the ends are a central piece 73a of the leaf spring 73, and both side pieces.
73c, 73c, facing the movable iron core 58 through
When an excessive current such as a short-circuit current flows through the conductive plate 71
Occurs on the pole faces of both side pieces 74a, 74a of the fixed iron core 74
The movable iron core 58 is attracted and oscillated by the magnetic force of
The driving part 58a projecting from one end face of the core 58 is moved.
To make it happen. The insertion hole 72 of the outer piece 71a of the conductive plate 71
The adjusting screw 77 is inserted into the screw hole 76 provided at the center of the flat plate 75.
Screw it in and insert the tip into the inverted L-shaped upper end of the bimetal 45.
And the adjustment screw 77 is opposed to the horizontal piece through the inner piece 71b.
By bending the inner piece 71b by screwing it,
The initial position of the lower end of the metal 45 can be adjusted
(See FIG. 17). A voltage is applied to the lower end of the vertical piece 71c of the conductive plate 71.
Blade receiving spring for sandwiching a conductive bar (not shown) disposed in the panel
The part 78 is welded and fixed, and
And one end of the movable contact 4A welded to the upper plate surface
The other end of the braid 79 is welded, the blade receiving spring portion 78, the conductive plate 7
1, bimetal 47, braided wire 79, movable contact 4A
It is electrically connected. On the other hand, a movable contact that holds the electromagnetic drive unit 48
4B is U-shaped with the rear end as an outer piece as shown in FIG.
Turn back to form an inner piece 80 parallel to the rear end,
The lower end of the bimetal 46 is L-shaped on the step surface at the upper end of the inner piece 80.
Place the horizontal piece of the folded part, fix it by welding, and hang the bimetal 46.
Standing up. The electromagnetic driving unit 48 is provided with the electromagnetic driving unit 47 described above.
Iron core 74 'and leaf spring 7 formed in the same shape as
3 ′, composed of a movable iron core 67,
The flat plate 75 'formed on the body is connected to the rear end of the movable contact 4B.
Insert between the inner piece 80 and the center of both side edges of the flat plate 75 '.
Side edge of the rear end of the movable contact 4B in the notch groove 75a '
The T-shaped piece 71d 'vertically erected from the center of
The fixed iron core 74 'is located at the rear end of the movable contact 4B.
It is held as shown in FIG. The movable iron core 58 'is provided on the surface of the fixed iron core 74'.
The projection (not shown) is inserted into the central piece 73 of the leaf spring 73.
a 'into the holes 73b' and 73b 'formed at the upper end.
Swingably supported by leaf spring 73 'by caulking and fixing
The leaf spring 73 'is bent to both sides of the central piece 73a'.
The fixed pieces 73c ', 73c' are fixed to the fixed core 74 '.
Are arranged along the outer surfaces of both side pieces 74a ', 74a'.
And protrude inward at the tip of both side pieces 73c ', 73c'
The fixed locking piece (not shown) is attached to the outer corner of the fixed iron core 74 ′.
In the recesses 74b ', 74b' formed in
It is further fixed to the fixed iron core 74. Both pieces 74a ', 74 of the fixed iron core 74'
The magnetic pole face which is the tip of a 'is the central piece 73 of the leaf spring 73'.
a 'and a gap between the side pieces 73c', 73c '.
Excessive current, such as short-circuit current, is possible.
When flowing to the moving contact 7B, both side pieces 7 of the fixed iron core 74 '
The movable iron core 6 is formed by the magnetic force generated on the magnetic pole surfaces 4a 'and 74a'.
7 is oscillated by suction to protrude from one end face of the movable iron core 67 '.
That is, the driving section 67a is moved. Insertion hole 8 provided at rear end of movable contact 4B
The adjusting screw is inserted into the screw hole 76 'provided at the center of the flat plate 75'.
Screw 77 'from below and insert the tip
46 is opposed to the horizontal piece of the L-shaped lower end of the base 46 via the inner piece 80.
And the adjusting screw 77 is screwed to bend the inner piece 80.
By adjusting the upper end position of the bimetal 46,
(See FIG. 17). The plate surface slightly below the upper end of the bimetal 46
Is disposed in the distribution board similarly to the blade receiving spring 78 described above.
One end is melted into a blade receiving spring portion 81 sandwiching a conductive bar (not shown).
The other end of the braided wire 82 is welded, and the blade
1, electrically connect the bimetal 46 and the movable contact 4B.
ing. The blade receiving spring portion 81 is a frame made of a synthetic resin molded product.
It is housed in the section 83. Thus, the circuit breaker of the present embodiment is assembled.
First, a terminal is inserted into the recess 8 of the first side case 1A.
While storing the block 10A, release the handle 17
It is installed in a fixed position together with the return spring 21. Also handle
6 together with the torsion spring 51 at a predetermined position,
As shown in FIG. 19, a blade provided near the bottom of one end.
The blade receiving spring portion 78 is stored in the receiving spring portion storing portion 90, and the conductive plate is
The vertical pieces 71c of the first 71 are separated from the partition walls 91 and 92 of the first side case 1A.
The partition walls 9 are arranged along the L-shaped gap between them.
2 so that the outer piece 71a is parallel to the upper surface of the upper horizontal wall 92a.
And the separation formed on the inner side surface of the first side case 1A.
The electromagnetic drive unit 47 is provided on the left side wall surface of the wall 65 (in FIG. 19).
And a bimetal 45 are arranged. At this time, the outer piece 71a of the conductive plate 71 and the inner piece 71a
The inside surface of the first side case 1A is located in the U-shaped bent portion 71b.
The protruding semicircular rib 103 is fitted and positioned
I do. The movable bar is in contact with the cutting groove 54 of the cross bar 40.
The contact 4A is fitted and the coil spring 53 is
4a and is pivoted to a predetermined position of the first side case 1A.
To be located. The operation plate 43 is connected to the link 44 by a handle.
6 and connected. Further, the separation wall 65 and the partition wall 92
The electromagnetic drive unit 48 and the bimetal 46 are housed in the space between
And the blade receiving spring 81 together with the frame 83
Blade receiving spring portion storage portion of the blade receiving spring portion 81 of the side case 1A
90 is disposed in the upper blade receiving spring storage portion 93 located above
You. At this time, the support piece 8 integrally extended from the lower portion of the frame portion 83
As shown in FIG. 19, the locking claw 83b at the lower end of 3a is moved to the first side.
The frame 83 is engaged with an engagement hole 94 formed in the case 1A.
On the inner surface of the front wall of the first side case 1A.
A projection 97 having a semicircular cross section is provided below the frame 83.
To support the department. The obliquely upward direction of the center of the movable contact 4B.
Slightly above the bottom of the first side case 1A.
The other end of the first side case 1A from the lower end of the separation wall 65 located
Parallel to the bottom in the part direction, and tilt upward from this parallel part
The partition wall 95 extending obliquely and the bottom of the first side case 1A
Between the movable contact 4B and the free end side of the movable contact 4B.
Fixed contact 12B is arranged via the notch 14a of
Arrange in space. At this time, the lower surface of the parallel portion of the partition wall 95 and the
Ribs 96 ... protruding from the bottom of the 1A case 1A are acceptable.
The rear end of the moving contact 4B is fixed. Also at this time
The first side case 1 is provided in the U-shaped bent portion between the rear end and the inner piece 80.
A semi-circular rib 103 'protruding from the inner surface of A is fitted.
Is positioned. Further, the first release plate 41 is connected to the torsion spring 60.
With the second pull
The detaching plate 41 is rotatably arranged at a fixed position. In this way, as shown in FIG.
Terminal 7 and a terminal accommodated in recess 9 of intermediate case 7
Block 10B, release handle 17 'and its return spring
After placing and assembling other than 21 'on the first side case 1A side
Terminal block 10B, release handle 17 'and return
The intermediate case 7 in which the spring 21 'is assembled to the recess 9 is placed on the first side.
It is arranged so as to overlap the case 1A side. Here, the intermediate case 7 is connected to the first side case 1A side.
The fixed end of the movable contact 4A
When placed in recess 34 via opening 39 in wall 32
Both of the fixed contacts 1 provided on the terminal block 10A
The tip side of 2A is placed on the step surface 31a of the bottom wall 31,
The shaft 36 will fit into the recess 37 of the release handle 17.
You. Fixed provided on one terminal block 10B
The contact 12B is on the rib 26 on the bottom of the first side case 1A.
Placed on In addition, downward facing formed at the end of the intermediate case 7
The lower surface of the step portion is formed on the end wall of the first side case 1A.
It is placed on a flat surface. In this state, the second side case 1B is
In this case, they are superimposed on the side 1A and joined. At this time
The first case 1A is integrally protruded from the first case 1A to the second case 1B.
Claw at the tip of four elastic locking pieces 100 at the upper and lower ends
Of the second side case 1B side.
By being locked to the hooked portion 102
The first side case 1A and the second side case 1B are connected and fixed.
The container 1 is constructed (see FIGS. A, 4, and 7).
See). A place where the first side cases 1A and 1B are disconnected and fixed.
In this case, the second side case 1B corresponds to each hooked portion 102.
The driver 151 is inserted through each release hole 150
Hook engaging portions 10 of the respective elastic engaging pieces 100.
1 upward to release the hooked state with the hooked portion 102.
By doing so, the first side case 1A to the second side case 1B
Can be removed. By attaching the second side case 1B,
The shaft holes 52 and 56 provided on the inner surface of the two-side case 1B
The shaft 40a of the crossbar 40 and the shaft of the first release plate 41
41a is rotatably inserted. The tone corresponding to each bimetal 45, 46
The heads of the adjusting screws 77 and 77 ′ are opened at the upper surface of the body 1.
Facing the mouth 104 and the opening 105 opening to the bottom
The optimum operating point was obtained during the operation test after assembly.
Screws 77, through openings 104, 105
Screw 77 'to adjust the initial positions of the bimetals 45 and 46.
The adjustment is made as shown in FIG. 17B from FIG.
After adjustment, use the elasticity of upper lid 106 and lower lid 106 '.
And fitted into the respective portions of the body 1 so that the openings 104, 1
05. Here, the bimetals 45 and 46 are the width of the body 1.
The part overlaps the longitudinal direction of the body 1 with the direction being the width direction.
The width of the body 1 is reduced in size.
I'm trying. Also, set the displacement directions to the outside
The initial position at which no displacement occurs
Even if the nozzles 45 and 46 are displaced, they must be closer than the initial position.
No work is required, so the work of arranging the bimetals 45 and 46 is easy.
And In other words, if they are displaced in the same direction,
It is necessary to check the amount of displacement of
In this embodiment, the disposition work of 5, 46 becomes troublesome.
Does not have such annoyance. A partition is provided between the bimetals 45 and 46.
Between the two bimetals 45 and 46 due to the presence of the separating wall 65
Can be narrowed, and the
Make sure to provide enough space for the closing mechanism 5 and the contact section.
It is. Further, a braid connected to each bimetal 45, 46
Since the lines 79 and 82 are routed from above and below the body 1,
The work of routing the braided wires 79 and 82 is facilitated. The inside of one end of the container 1 is vertically guided.
Blade receiving spring portions 78 and 81 for sandwiching the power bar are stored and arranged.
So as to correspond to these blade receiving spring portions 78 and 81.
One end of the container 1 has a U-shape on the end surface and both side surfaces of the container 1.
The opened conductive bar insertion grooves 107 and 108 are formed.
And The other end of the body 1 is opened obliquely upward.
A pair of wire insertion holes 16A and 16B are formed in parallel.
You. Further below the wire insertion holes 16A, 16B.
The side surfaces of both cases 1A and 1B and the intermediate case 7
Fixed in the lower section of the two sections divided by
Gas generated by opening and closing of constant contact 2B and movable contact 3A
The exhaust hole 109 for exhausting air and the locking hole 112
As shown in FIG.
Fixed contacts 2A arranged in the upper section
The gas generated by opening and closing with the movable contact 3A is obliquely upward.
An exhaust hole 110 for exhaust is opened. The two exhaust holes 109 and 110 are vertically separated.
And the angle at which the directions facing the exterior of the container 1 are separated from each other.
Therefore, the arc discharge directions at the time of forced opening
In contrast, the gap between the two poles
Short circuit can be prevented. Here, the exhaust shown in FIG.
The hole 110 is the leading edge rib 1 of the inner intermediate case 7.
13. The rib 1 protruding from the side surface of the release lever 17, 17 '
14 and 114 and opening of the exhaust holes 110 of the cases 1A and 1B.
Exhaust gas is directed obliquely upward by the laterally protruding wall 115 facing the mouth.
The exhaust gas exhausted from the lower exhaust hole 109
It has become difficult to interact with Su. The electric wire insertion holes 16A and 16B are respectively
Each of the terminal blocks 1 is inserted by inserting the electric wires 111 on the load side.
0A, 10B, and a conductive bar is attached to each blade receiving spring portion 78.
If connected, insert the circuit breaker of this embodiment into the circuit
Can be done. Next, the operation of this embodiment will be described with reference to FIGS.
This will be described below. FIG. 20 shows the off state.
In the state, the operation unit 6a of the handle 6 is inverted from the opening 50.
In an exposed state, one end of the operation plate 43 and the first release
The engagement state with the plate 41 is in a disengaged state. And coil
The crossbar 40 is moved clockwise in the drawing by the spring 62.
It is urged to rotate, and the kerf of the crossbar 40 is
The movable contact 4A penetrated through 54 has its free end upward.
It is in a state where it is moved, and it is movable
The contact 4B moves its free end upward by its spring elastic force.
Movable contacts provided at each free end
3A and 3B are separated from the corresponding fixed contacts 2A and 2B
In state. In this state, the operation unit 6a of the handle 6 is
When the rotation operation is performed in the direction, the upper shaft 44a of the link 44 is moved downward.
The link 44 is moved by the lower shaft 44b
The operating plate 43 is pushed down. To push down the operation plate 43
One end (right end in the figure) of the operating plate 43 is the first pull-out.
It hits the locking portion 57 of the work plate 41, and its position is defined as the rotation center.
As a result, the operation plate 43 rotates counterclockwise,
The end (left end) is the upper end of the crossbar 40 as shown in FIG.
The crossbar 40 against the projection 84 provided on the
Rotate clockwise against spring bias. By this rotation, the cutting groove 55 of the crossbar 40
The movable contact 4B penetrated through the free end moves the free end downward.
The movable contact 3B at the free end.
It is brought into contact with the constant contact 2B. In addition, it is possible to insert
The moving contact 4A rotates counterclockwise to move its free end.
The contact 3A is brought into contact with the fixed contact 3B. This contact is movable
Such that the contact 3B lags behind the fixed contact 2B
ing. Here, the movable contact 4B has its own elasticity.
Since contact pressure is obtained, no spring means for contact pressure is required.
Since there is no need to make electrical connections using braided wires,
Work is not required to incorporate
I'm making it up. Then, the handle 6 is further rotated clockwise.
Then, the position of the lower shaft 44b of the link 44 and the handle 6
The upper shaft 44b from the line connecting the rotation centers of
Move to the left, and in this state, twist the handle 6
, A coil spring 62 for urging the cross bar 44,
Further, the spring force and the like of the movable contact 4B are balanced and the operation plate 43
Latched state between one end and the locking portion 57 of the first release plate 41
Are maintained, and the ON state of FIG. 22 is maintained. FIG.
The ON state is shown with the trip plates 41 and 42 removed.
You. In the on state, the operating section 6a of the handle 6 is
When rotated counterclockwise, the upper shaft 44a of the link 44
Position connects the rotation center of the handle 6 and the lower shaft 44b.
Of the operation plate 43 to move upward beyond the right
Latch state between the left end and the locking portion 57 of the first release plate 41
Is released, and the crossbar 40 is biased by the coil spring 62.
While turning clockwise, the handle 6 is
With the urging force of 51, it is quickly turned and returned to the off side. Crossbar
The movable contact 4A is clocked by the clockwise rotation of -40.
To move the free end upward to move the movable contact 3A.
It is separated from the fixed contact 2A. The movable contact 4B is lower
There is no push down in the direction, and the spring force returns to the original state
The movable contact 3B at the free end is fixed to the fixed contact.
Separated from 2B. This separation is fixed by the movable contact 3A.
It is later than opening from the contact 2A. This delay will be described later.
The same applies to forced opening. Here, as described above, the opening and closing of the contact portions of both poles is performed.
Due to the delay as described above, the
Only the movable contact 4A on the rigid body side
Of the movable contact 3B made of
You. The arcs generated at the contact points of both poles are
Exhaust generated in the installation compartment and exhausted through the exhaust holes 109 and 110
Since the directions are different, a short circuit between the poles due to the arc can be prevented. Further, a crossbar that rotates when the contact portion is opened.
The two grooves are formed in the groove 131 formed in the width direction of the front end face of the case 40.
Stop pieces 130 formed on 1A, 1B and intermediate case 7
One section to engage and abut against the bottom of the groove 131
Is the arc generated at the crossbar 40 on the back side of the body 1
Eliminate the risk of getting around and entering other compartments,
1 Prevent short circuit between poles due to an arc inside. The fixed contact 2 of the upper fixed contact 12A
The space near A is bulged by the bulging portion 30 of the intermediate case 7.
Wide space between the side walls of the bases 1A and 1B, and the lower side
The space near the fixed contact 2B of the fixed contact 12B of
Because it is a wide space between the side walls of the
Reduce the gas pressure due to the arc generated when each contact is opened.
The two cases 1A and 1B can be
Cracks and breakage can be prevented. The intermediate case 7 is made of a resin containing Mg hydroxide.
Since it is formed of a material,
Oxidize carbon to prevent insulation deterioration due to carbon.
Can be. Now, in the ON state shown in FIG.
If an overcurrent flows through the load, the bimetals 45 and 46
Heat is generated by the flow, causing a curved displacement. Up here
The lower end of the bimetal 45 hanging from the left side in the figure
The bimetal 46 is displaced to move to
Is displaced so that the upper end moves to the right, as shown in FIG.
The lower end of the bimetal 45 is
1 Push the drive unit 69 to the left, and the upper end of the bimetal 46
The second drive unit 70 of the second release plate 42 is pushed rightward.
That is, the free ends of the bimetals 45 and 46 are separated from each other.
Displace in the direction. This displacement causes the first and second tripping plates 4
1 and 42 rotate clockwise, but at this time,
The facing portion 42a of the strip 42 is a receiving portion of the first tripping plate 41.
Press 59 to apply a clockwise turning force to the first release plate 41.
give. Here, the energizing direction of the bimetals 45 and 46 is
Because the directions are opposite to each other, when a large current flows
In addition, both bimetals 45 and 46 have a magnetic field in a direction away from each other.
Force is generated. Therefore, the bending deformation of the bimetals 45 and 46 is changed.
Position can be made faster, resulting in faster forced opening.
Can be done. This operation depends on the short-circuit current described later.
It is also effective at the time of forced opening. The first release plate 41 is rotated clockwise.
Then, the connection between the locking portion 57 and one end (right end) of the operation plate 43 is made.
Is released, and the operation plate 43 is connected to the lower shaft of the link 44.
It will rotate clockwise around 44b. So
Therefore, the crossbar 40 is formed by the other end (left end) of the operation plate 43.
Of the coil spring 62
It is rotated clockwise by the spring force and allowed to rotate as shown in FIG.
The moving contacts 4A and 4B are returned to the off state, and the movable contact 3
A and 3B are separated from the fixed contacts 2A and 2B, respectively. Thereafter, the bimetal 45, 4
6 returns to the original state, and the first release plate 41 is a torsion spring.
It returns to the original position by the bias of 60, and at the same time the second pull
The receiving portion 59 pushes and moves the receiving portion 59a of the facing portion 42a of the detaching plate 42.
To return the second tripping plate 42 to its original position. Also handle 6
It is turned off (counterclockwise) by the bias of the torsion spring 51.
Will move. Further, in the on state, the short-circuit current
When an excessive current flows, the electromagnetic drive units 47 and 48 are fixed.
The movable core 5 corresponding to the magnetic force generated in the cores 74 and 74 ′
8, 67 is sucked and swung. This is shown in FIG.
So that the driving portion 58a of the movable iron core 58
Pushes the receiving portion 88 of the plate 41 and drives the movable core 67
67a pushes the receiving portion 68 of the release plate 42 to
Turn in the measuring direction. In the same way as when an overcurrent flows, the first
When the release plate 41 rotates clockwise, the locking portion 57
The latched state with one end (right end) of the operation plate 43 is released,
The operation plate 43 is moved about the lower shaft 44b of the link 44 as a center.
It turns in the measuring direction. Therefore, other than the operation plate 43
The regulation of the crossbar 40 by the end (left end) is removed,
The loss bar 40 is turned clockwise by the spring force of the coil spring 62.
And the movable contacts 4A and 4B are returned to the off state.
And the movable contacts 3A and 3B are moved from the fixed contacts 2A and 2B respectively.
Disengage. Thereafter, the electromagnetic drive units 47, 4
When no magnetic force is generated in the fixed iron cores 74 and 74 ′ of No. 8,
The movable iron cores 58 and 67 return to the original state by the spring force of the leaf spring.
Returning, the first release plate 41 is biased by the torsion spring 60.
Pivotally return to the original position, and simultaneously release the second
Push to return. The handle 6 is a torsion spring 5
Rotating in the off direction (counterclockwise) by the bias of 1
become. Here, each fixed iron core 7 of the movable iron cores 58, 67
4, 74 'so that the suction directions are opposite to each other
Since the electromagnetic drive units 47 and 48 are disposed in the
Even if one of the movable iron cores 58 and 67 vibrates,
To the opposite direction,
First, release the second release plates 41 and 42 in the latch release direction.
The rotating force depends only on the movement of one of the movable iron cores.
The first force against the urging force of the torsion spring 60.
Cannot obtain the force to pull off the release plate 41 of
Malfunction due to vibration can be prevented. The present invention can be applied between fixed contacts and between movable contacts.
In the width direction, between each fixed contact and each movable contact
It is possible to narrow the vertical direction of the container between
There is no need to increase the width and height of the body,
There is an effect that the size can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an embodiment of the present invention. FIG. 2 is a side view of the same. FIG. 3 is a sectional view taken along the line BB of FIG. FIG. 4 is a sectional view taken along the line AA in FIG. 2 of the above. FIG. 5 is a sectional view taken along the line CC of FIG. FIG. 6 is a perspective view of the same. FIG. 7 is a front view of the same. FIG. 8 is a top view of the above. FIG. 9 is a bottom view of the above. FIG. 10 is a rear view of the same. FIG. 11 is an enlarged perspective view of the intermediate case. FIG. 12 is an enlarged exploded perspective view in which a part of the crossbar portion is omitted. FIG. 13 is an exploded perspective view of a structural part of the upper electromagnetic drive unit and the upper bimetal in the same. FIG. 14 is a perspective view of a structure of an upper electromagnetic drive unit and an upper bimetal according to the first embodiment; FIG. 15 is an exploded perspective view of a structural portion of a lower electromagnetic drive unit and a lower bimetal according to the first embodiment. FIG. 16 is a perspective view of a structure of a lower electromagnetic drive unit and a lower bimetal of the above. FIG. 17 is an explanatory view of adjusting the bimetal according to the embodiment. FIG. 18 is an enlarged perspective view of a part of the upper exhaust hole, which is partially omitted and broken, for explaining the structure of the upper exhaust hole. FIG. 19 is a side view showing a state where members are assembled to the first side case of the above. FIG. 20 is a state explanatory view of the above-mentioned off state. FIG. 21 is an explanatory diagram of a state during transition to the on state in Embodiment 1; FIG. 22 is an explanatory diagram of an on-state of the above. FIG. 23 is an explanatory diagram showing an on-state in a state where the tripping plate is removed. FIG. 24 is a diagram illustrating a state of a trip operation due to an overcurrent according to the embodiment. FIG. 25 is a state explanatory diagram of the instantaneous interruption state due to the excessive current. [Description of References] 1 Body 1A, 1B Side case 2A, 2B Fixed contact 3A, 3B Movable contact 6 Handle 6a Operation section 7 Intermediate case 13a Lock pieces 16A, 16B Electric wire insertion holes 78, 81 Blade receiving spring section

Continuation of front page    (72) Inventor Takehiko Okada             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor ▲ Taka ▼ Shinji Yama             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Takuya Kagawa             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Kenichiro Shimizu             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Toshihiro Oido             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Takanobu Tanaka             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Mizuno Hatsuo             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company (72) Inventor Yoshiya Nakamichi             Matsushita Electric Works, 1048 Kadoma, Kazuma, Osaka             In the formula company

Claims (1)

Claims: 1. A first and second side case is formed by butt-joining, and a conductive bar insertion groove which is open in a U-shape at an end face and both side faces is formed at one end. A container having an electric wire insertion hole formed in parallel at the other end thereof, and a two-pole blade which vertically accommodates a conductive bar inserted from the conductive bar insertion groove, which is housed and disposed inside one end of the container. A receiving spring portion, a two-pole quick-connecting terminal for pressing a core wire of an electric wire housed at the other end of the container and inserted from each of the electric wire insertion holes against a terminal plate with a lock piece and connecting the same; A fixed contact and a movable contact interposed in an electric path between the unit and the quick connection terminal; an opening / closing mechanism for bringing the movable contact into and away from the fixed contact; And a handle for moving the movable contact to and away from the fixed contact via the opening / closing mechanism And a partition member sandwiched between the first and second side cases on the other end side of the container body, wherein the wire insertion holes are respectively formed on end surfaces between the partition member and the respective side cases. The circuit breaker wherein the quick connection terminal is disposed between the partition member and each of the side cases.