JP2001307611A - Circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-pole type circuit breaker to make assembly work simple. SOLUTION: An apparatus body 1 is constructed by putting a second side case 1B on a first side case 1A and connecting them. This connection is done by locking claw shaped locking parts 101 of tips of elastic locking pieces 100... projecting as one body from both side upper and lower four places of the first side case 1A toward the second side case 1B side with projection parts to be locked 102 provided on the second side case 1B corresponding to the locking parts 101. This connection is released by inserting a driver 151 from each release hole 150 opened on the second side case 1B corresponding to each part to be locked 102... and pressing the locking part 101 of each elastic locking piece 100... upward and releasing from a condition of locking with the part to be locked 102.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker in which a case is divided and components are inserted in a horizontal fitting manner.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No.
There was one as shown in 1-67046.
In this conventional circuit breaker, a case in which components are inserted horizontally is divided into a plurality of cases, and the components are inserted between the side cases and connected by rivets or screws.

[0003]

In the above-mentioned conventional circuit breaker, since the respective cases are connected by rivets or screws, a special jig for rivet or screw tightening work is required. In addition, there has been a problem that the connecting operation between the side cases is troublesome.

[0004] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a circuit breaker that facilitates connection work between respective cases.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a first side case in which components are arranged by side fitting from side openings, and each component is mounted on the first side case. And a second side case attached so as to close the opening of the first side case in a state in which the first and second side cases are fitted. A plurality of hooks protruding from the other side of the first side case and the second side case are provided, and hooked portions on which the respective hooks are hooked are provided on the other of the first side case and the second side case, respectively. A release hole is formed to communicate with the hooked portion and to suppress the hooking portion when the jig is inserted to release the hooked state with the hooked portion.

According to a second aspect of the present invention, in the first aspect of the present invention, the hooking portion and the hooked portion are formed at at least four positions in the height direction of each side case and in both end directions. I do.

According to a third aspect of the present invention, in the second aspect of the present invention, the hooking directions of the hooking portion and the hooked portion formed at the four locations are different from each other in the vertical direction.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, a through hole communicating with at least one set of the plurality of hooks and hooked portions is provided on the upper surface of each side case. And at least one set of the hooked portion and the hooked portion of the hooked portion face the through-hole, and the hooking portion is brought into contact with the hooked portion with the hooked portion hooked on the hooked portion, and the through-hole is formed. It is characterized by attaching a closing cover.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a handle projection for arranging a handle is provided on the upper surface of each of the side cases, and the through hole is connected from one end of the handle projection. It is characterized in that it is formed and an insertion hole of the cover is formed.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, a sealing material for closing at least one of the release holes is attached to each of the side cases.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

The circuit breaker of the present embodiment is provided in a body 1 formed by connecting a first side case 1A and a second side case 1B made of synthetic resin on both sides in the width direction of the body 1. Two fixed contacts 2A, 2B arranged in parallel, and each of these fixed contacts 2A, 2A,
A movable contact 4A, 4B to which movable contacts 3A, 3B opposing to the movable contact 2B are fixed, and an opening / closing mechanism 5 for driving the two movable contacts 4A, 4B; By operation, each movable contact 3A, 3B is brought into contact with and separated from each fixed contact 2A, 2B via the opening / closing mechanism 5 (contact / contact).
(Fixed contact) 2A, 2B
And the movable contacts 4A and 4B are vertically arranged in the height direction of the body 1, and one of the two movable contacts 4A and 4B is interposed between the two fixed contacts 2A and 2B in the height direction. The movable contact 4B of the other movable contact and the movable contact 3 of the other movable contact 4A
A and the fixed contacts 2A to and from which the fixed contacts A are separated from each other.
When the movable contacts 3A and 3B are separated from each other, the movable contacts 3A and 3B are arranged at a height position where they do not intersect when viewed from the width direction of the body 1.

[0013] Inside one end of the container 1, both side cases 1A, 1
The intermediate case 7 molded from a synthetic resin material containing an alkaline earth metal hydroxide (for example, Mg hydroxide) is fixed so as to be sandwiched between B and the side wall (outer wall) of the first side case 1A. Inner recess 8 and vertical wall 35 of intermediate case 7
The terminal block 10A constituting the first fixed-side electric circuit provided with the fixed contact 2A at one end is accommodated in the section defined by the following formula, and the recess 9 provided on the second case 1B side of the intermediate case 7
A terminal block 10B constituting a second fixed-side electric circuit having a lower fixed contact 2B provided at one end is housed in a section defined by the first side case 1B and the side wall (outer wall) of the second side case 1B.

The terminal block 10A is integrally extended with a terminal plate 11 bent in a U-shape from one end of a lower piece of the terminal plate 11, and extends from an upper end of the extension piece 11a.
a fixed contact 12A bent at a right angle to a and extended integrally outward with respect to the terminal plate 11;
A fixed contact 2A caulked and fixed to the upper surface of one end of A, and a substantially M-shaped locking spring 13A mounted on the lower piece of the terminal plate 11 and housed in the terminal plate 11; The terminal plate 11 is placed on the downwardly inclined bottom surface of the recess 8 of the side case 1A.
And the extension piece 11a is arranged along the rising wall 8a at one end of the concave portion 8, and the fixed contact 12A is led out of the concave portion 8 beyond the upper end of the rising wall 8a so as to be connected to the rising wall 8a. The fixed contact 12A is fixed on the fixed contact disposing portion 15 integrally formed by being inclined in the same manner as the bottom of the recess 8 between the partition 14 rising from the bottom of the first side case 1A.
The terminal block 10 </ b> A is disposed in the recess 8 by arranging the tip of the terminal block 10 </ b> A. The fixed contact disposing portion 15 is formed with a concave portion 15a for releasing the lower end of the fixed contact 2A protruding from the lower surface of the fixed contact 12A. The terminal plate 11 is integrally formed with a T-shaped piece 11b extending upward from the other end of the upper piece, and one end of a side protruding portion at 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, a projection 23 which is inserted into the holding piece 13b of the locking spring 13A and prevents rattling of the locking spring 13A is integrally formed on the side surface of the side piece of the terminal plate 11.

The locking spring 13A and the terminal plate 11 constitute a quick connection terminal as a conductor connecting portion. When the intermediate case 7 is overlaid on the first side case 1A, the other end of the first side case 1A is provided. Diagonal downward groove 1 with a semicircular cross section formed in the vertical wall
A core wire of an electric wire (not shown) inserted from the outside through an obliquely downwardly directed wire insertion hole 16A formed by a similarly formed obliquely downwardly directed groove 160 in a wall formed on the opposite wall surface of the intermediate case 7 is connected to a terminal. It is press-fitted between the upper piece of the plate 11 and the upper end of the locking piece 13a of the locking spring 13A and the upper end of the holding piece 13b, and the tip of the locking piece 13a locks the core wire in the direction in which the electric wire is drawn out; By pressing the core wire against the upper piece of the terminal plate 11 at the upper end surface of the holding piece 13b, the core wire is electrically connected and mechanically held. A release handle 17 is used to release the wire lock. The release handle 17 is provided with a pivot shaft 18 provided on the lower side surface and a shaft hole 20 provided in the convex flat portion 22 on the inner side surface of the first side case 1A.
A shaft 36, which is rotatably supported on the inner case 7 and protrudes from the wall surface of the vertical wall portion 35 of the intermediate case 7, is rotatably supported by a concave portion 37 provided on the other lower side surface. By manually operating and rotating the operation part 17a exposed to the outside, the drive projection 19 provided at the lower end causes the locking piece 13a of the locking spring 13A to lock.
By pressing the tip of one side end, the lock piece 13a is bent to release the lock with respect to the core wire.
In the figure, reference numeral 21 denotes a return spring which constantly biases the release handle 17 in the anti-manual operation direction.

On the other hand, the terminal block 10B has a terminal plate 11 and a locking spring 13B basically similar to the terminal block 10A.
And a fixed contact 12B, but 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 as to be parallel to the bottom of the terminal plate 11, and a back piece 11d is formed to extend at right angles from one end of the side piece of the terminal plate 11.

The lock spring 13B has the same structure as the lock spring 13A, and is mounted on a 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 constitutes the bottom of the concave portion 9 of the intermediate case 7, and places the lower piece of the terminal plate 11 on a horizontal wall 24 extending substantially parallel to the bottom of the container 1. The extension piece is formed by fitting the back piece 11d along the vertical wall 25 at one end of the recess 9 and fitting one end of the terminal plate 11 into a notch 27 formed between the lower end of the vertical wall 25 and one end of the horizontal wall 24. When the intermediate case 7 is overlaid on the first side case 1A side, the front end of the fixed contactor 12B, that is, the lower surface provided with the fixed contact 2B is placed on the first side case. 1A is mounted on the bottom ribs 26, 26. That is, the fixed contact 2B is a space formed between the side wall portion 24 of the intermediate case 7, the bulging portion 30 described later, and the side walls of the both cases 1A and 1B.
It is arranged so as to straddle between A and 1B. The recess between the ribs 26, 26 serves as a relief for the lower end of the fixed contact 2B fixed to the tip of the fixed contact 12B and protruding from the lower surface side of the fixed contact 12B.

The tip of a laterally projecting portion at the upper end of a T-shaped piece 11b formed to extend from the other end of the upper piece of the terminal plate 11 to the information is a convex flat portion 22 'formed on the wall surface of the intermediate case 7. Is placed on the upper end surface of the.

The locking spring 13B of the terminal block 10B and the terminal plate 11 constitute a quick connection terminal as a conductor connecting portion as in the case of the terminal block 10A, and when the intermediate case 7 is overlaid on the second side case 1B. An obliquely downward groove 1 having a semicircular cross section and provided in a vertical wall at the other end of the recess 9 of the intermediate case 7.
60 and the diagonally downward groove 160 as well as the second side case 1
When an electric wire is inserted through an electric wire insertion hole 16B formed by an obliquely downward groove 160 provided in a vertical wall at the other end of B, the core wire is locked and locked by a locking piece 13a of a locking spring 13B. The core wire is pressed against the upper piece of the terminal board 11 by the piece 13b to electrically connect the wires and mechanically lock the wires.

This wire lock is released by a release handle 17 ′. The release handle 17 ′ is provided with a rotating shaft 18 provided on the lower side surface, similarly to the release handle 17, and a convex flat portion 22 of the intermediate case 7. The shaft 38 rotatably supported by the shaft hole 20 provided on the inner case 1 and protruding from the inner wall surface of the second side case 1B is rotatably supported by a recess 37 formed on the side surface. When the operating portion 17a exposed on 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 side end of the locking piece 13a of the locking spring 13B to lock the locking piece. 13a can be bent to release the locked state. In the figure, reference numeral 21 'denotes a return spring which constantly biases the release handle 17' in the anti-manual operation direction.

As shown in FIG. 8, the intermediate case 7 projects toward the second side case 1B with respect to the vertical wall portion 35 substantially parallel to the side walls of the two side cases 1A and 1B and contacts the inner surface of the side wall of the second side case 1B. The vertical wall 25 is formed by forming a bulging portion 30 that comes into contact with the lower wall of the bulging portion 30, and the side wall, the bottom wall 31, the vertical wall 32 at one end, and the side wall facing the second side case 1B side. A recess 34 surrounded by a ceiling wall 33 is provided on the first side case 1A side. When the intermediate case 7 is abutted against the first side case 1A, the tip side of the fixed contact 12A of the terminal block 10A assembled on the first side case 1A side is on the step surface 31a of the bottom wall 31 of the recess 34. And the ceiling wall 33 is arranged along the lower surface of the horizontal wall 29 protruding from the inner surface of the first side case 1A. The fixed contact 2 fixed to the fixed contact 12A by caulking on the step surface 31a.
A groove 31b for allowing the lower end of A to escape is formed. The vertical wall 32 has an opening 39 for inserting the free end of the movable contact 4A corresponding to the fixed contact 2A into the recess 34.

The opening / closing mechanism 5 for driving the movable contacts 4A and 4B to open and close includes an operating plate 43 serving as a latch member, a crossbar 40, and a step-like locking portion 5 for locking one end of the operating plate 43.
7 and a second tripping plate 42
, A handle 6, a U-shaped link 44 and the like, two bimetals 45 and 46 for driving the switching mechanism 5 when an overcurrent is detected, and an electromagnetic drive for driving the switching mechanism 5 when a short-circuit current flows. Parts 47 and 48 are added.

The handle 6 comprises an operating portion 6a, a rotating portion 6b, and a handle shaft 6c. A handle shaft 6c projecting from the center of both side surfaces of the rotating portion 6b is formed on the inner surface of the first side case 1A. The shaft hole 49 thus formed and the shaft hole 49 formed on the inner surface of the second side case 1B are rotatably inserted into the shaft hole 49 and held between the two cases 1A and 1B. , 1B composed of the connected state of 1B
And a window hole 50 that opens on the upper surface of the device. A torsion spring 51 is mounted on the handle shaft 6c, and the torsion spring 51 causes the handle 6 to be turned on (see FIG. 1).
4) is urged in the off operation direction.

An upper shaft 44a of a link 44 is rotatably inserted into a shaft hole 52 provided at the lower end of the rotating portion 6b, and is connected to the operating plate 43 via the link 44.

The operating plate 43 has bearing holes 4 provided on both sides of the center.
When the lower shaft 44b of the link 44 is inserted through the 3a, the lower shaft 44b is connected to the handle 6 via the link 44, and is disposed within the body 1 so as to be vertically movable.

The crossbar 40 has a shaft 40a protruding from both upper side surfaces inserted into shaft holes 52, 52 formed in the inner side surfaces of both side cases 1A, 1B to be pivotally supported between both side cases 1A, 1B. Then, as shown in FIG. 9, a cut groove 54 for laterally fitting the side of the movable contact 4A is formed on the side of the first side case 1A slightly below the shaft 40a, and the lower second side case 1B The side portions are provided with cut grooves 55 for fitting the movable contact 4B from the lateral direction. On the movable contact side end surface, stop pieces 130... Protruding from the inner surfaces of the side walls of the intermediate case 7 and both side cases 1A and 1B are provided with movable contacts 3A and 3B.
B is engaged with the fixed contacts 2A and 2B in a state of being separated from each other, and a concave groove 131 is formed in the width direction to contact the bottom thereof.

The movable contact 4A is made of a rigid conductive metal plate, is inserted into the cut groove 54 of the cross bar 40 from the side, and has a concave portion 54 provided behind the cut groove 54.
3A, the rear portion is urged upward by a contact pressure coil spring 53 that is compressed and disposed between the lower surface of the rear portion and the bottom portion of the concave portion 54a.
When the movable contact 4A rotates about the center 0a, the movable contact 4A rotates about the opening edge of the cut groove 54, and the movable contact 3A caulked and fixed to the free end is separated and brought into contact with the corresponding fixed contact 2A. It has become.

The movable contact 4B is made of a conductive spring thin plate. When the crossbar 40 rotates in the ON operation direction, the movable contact 4B is pushed downward and bends, and from this bent state, the crossbar 40 moves in the OFF operation direction. When it rotates, it returns, and the movable contact 3B crimped and fixed to the tip by its bending and return
Is brought into contact with and separated from the fixed contact 2B.

The lower end of the crossbar 40 is
The first side case 1 </ b> A is pressed by a coil spring 62 that is compressed and arranged between a wall 63 suspended from the bottom of the first side case 1 </ b> A to apply a rotational force.

The first release plate 41 includes a shaft portion 41a, a protrusion portion 41b projecting above the shaft portion 41a, and a shaft portion 41a.
a side piece 41c having a surface orthogonal to the shaft section 41a near the second side case 1B side of FIG. 3a, and an arm piece 41d integrally extended at one end from the upper end of the side piece section 41c.
Are inserted into shaft holes 56, 56 provided in the inner surfaces of both cases 1A, 1B to be rotatably supported between both cases 1A, 1B. The locking portion 57 to which one end of the plate 43 is engaged and disengaged, and the arm piece 41
A receiving portion 88 that is pushed and driven by the driving portion 58a of the movable iron core 58 of the electromagnetic driving portion 47 is formed at the upper end of the end d. On the side surface of the second side case 1B below the side piece portion 41c, a receiving portion 59 pushed and moved by the facing portion 42a provided on the lower end portion end surface of the second tripping plate 42 is formed. A locking portion 61 for locking both ends of the torsion spring 60 for fitting the ring portion to the shaft portion 41a is provided on the side surface.
Also, on the side surface of the first side case 1A below the side piece 41c,
A first drive unit 69 is provided which is opposed to the lower end of the bimetal 45 hung down from the conductive plate 71 fixedly holding the electromagnetic drive unit 47 and is pushed when the bimetal 45 is bent and displaced.

The second release plate 42 has a central shaft hole 42b.
The shaft 66 provided at the center of the end surface of the separation wall 65 is integrally inserted into the first side case 1A from the vicinity of the upper side to the bottom of the first side case 1A. , 1B, so that it can be pivoted freely.
A receiving portion 68 is provided on the lower end surface on the opposite side of the above-described facing portion 42a, and is pushed and driven by the driving portion 67a of the movable iron core 67 of the electromagnetic driving portion 48. Further, the upper end of the second tripping plate 42 is opposed to the upper end of the bimetal 46 suspended from the rear end of the movable contact child 4B holding the electromagnetic drive unit 48 on the side surface on the first side case 1A side. There is provided a second drive unit 70 that is pushed when the nose is bent.

The conductive plate 71 made of a thin metal material is supported by the electromagnetic drive unit 47 and is fixed by welding and fixing the bimetal 45.

The electromagnetic drive unit 47 is configured such that the magnetic iron plate is bent in the opposite L direction, and both ends of the vertical piece are bent at right angles to form a fixed iron core 74 having a U-shaped horizontal section, a movable iron core 58, and a movable iron core 58. And a leaf spring (not shown) for swingingly supporting the magnetic pole surfaces at both ends of the fixed iron core.
The fixed iron core is fixed to the conductive plate 71. When an excessive current, such as a short-circuit current, flows through the conductive plate 71, the movable core 58 is attracted and oscillated by the magnetic force generated on the magnetic pole surfaces at both ends of the fixed iron core 74, so that the movable core 58 The driving portion 58a projecting from the side end surface is moved.

The detailed description of the configuration of the electromagnetic drive section 47 is not the gist of the present invention, and thus is omitted.

The bimetal 45 can adjust the lower end position of the bimetal 45 by screwing the adjusting screw 77. Since this adjusting mechanism is not the gist of the present invention, a detailed description is omitted.

At the lower end of the vertical piece 71c of the conductive plate 71, a blade receiving spring portion 78 sandwiching a conductive bar (not shown) provided in the distribution board is welded and fixed, and slightly above the lower end of the bimetal 45. The other end of the braided wire 79, one end of which is welded to the movable contact 4A, is welded to the plate surface, and the blade receiving spring portion 78, the conductive plate 7
1, the bimetal 47, the braided wire 79, and the movable contact 4A are electrically connected.

On the other hand, the movable contact 4B, which holds the electromagnetic drive section 48, has a horizontal piece of the lower L-shaped bent portion of the bimetal 46 placed on the rear end thereof and is fixed by welding to make the bimetal 46 stand upright.

The electromagnetic drive unit 48 is provided with the electromagnetic drive unit 47 described above.
A fixed iron core 74 ', a leaf spring (not shown), and a movable iron core 67 are formed in the same shape as the above, and the fixed iron core 74' is fixed to the rear end of the movable contact 4B. The movable core 67 protrudes from the surface on the side of the fixed core 74 ′ to form a projection (not shown).
The leaf spring 73 is swingably supported by the leaf spring 73, and the leaf spring 7 is fixed to a fixed iron core 74 '. The magnetic pole surfaces, which are the tips of both side pieces of the fixed core 74 ', face the movable core 67, and when an excessive current such as a short-circuit current flows through the movable contact 7B, the fixed core 7
The movable core 67 is attracted and oscillated by the magnetic force generated on the magnetic pole surfaces of both side pieces of the movable core 4 ′, and the driving portion 67a protruding from one end surface of the movable core 67 is moved.

The detailed description of the structure of the electromagnetic driving section 47 is not the gist of the present invention, and thus will be omitted.

The upper end position of the bimetal 46 can be adjusted by screwing an adjusting screw 77 '. Since this adjusting mechanism is not the gist of the present invention, a detailed description is omitted.

On the plate surface slightly below the upper end of the bimetal 46, one end is attached to a blade receiving spring portion 81 which sandwiches a conductive bar (not shown) provided in the distribution board, similarly to the above-mentioned blade receiving spring portion 78. Is welded, and the blade receiving spring portion 81, the bimetal 46, and the movable contact 4B are electrically connected. The blade receiving spring portion 81 is housed in a frame portion 83 made of a synthetic resin molded product.

When assembling the circuit breaker of the present embodiment, first, the terminal block 10A is housed in the recess 8 of the first side case 1A, and the release handle 17 is assembled together with the return spring 21 into a fixed position. Further, the handle 6 is assembled at a predetermined position together with the torsion spring 51, and further, the blade receiving spring portion 78 is stored in a blade receiving spring portion storing portion 90 provided near the bottom at one end, and the vertical piece 71c of the conductive plate 71 is moved to the first position. The outer case 71A is arranged along the L-shaped gap between the partition walls 91 and 92 of the side case 1A and the outer piece 71a is arranged in parallel with the upper surface of the upper horizontal wall portion 92a of the partition wall 92. The left wall surface of the separation wall 65 formed on the flat inner surface (see FIG.
In (2), the electromagnetic drive unit 47 and the bimetal 45 are arranged. At this time, the outer piece 71a of the conductive plate 71 and the inner piece 71
A semi-circular rib 103 protruding from the inner side surface of the first side case 1A is fitted into the U-shaped bent portion b and positioned.

Then, the cross bar 40 is fitted with the movable contact 4A into the cut groove 54, and the coil spring 53 is housed in the concave portion 54a and is rotatably disposed at a predetermined position of the first side case 1A. Further, the operation plate 43 is disposed so as to be connected to the handle 6 by a link 44. Further, the separation wall 65 and the partition wall 92
The electromagnetic drive unit 48 and the bimetal 46 are housed in a space between the blade receiving spring part 81 and the frame part 83, and the blade receiving spring part 81 is located above the blade receiving spring part housing part 90 of the blade receiving spring part 81 of the first side case 1A. At the upper blade receiving spring accommodating portion 93 located at the position shown in FIG. At this time, the locking claw 83b at the lower end of the support piece 83a integrally extended from the lower portion of the frame 83 is locked in a locking hole (not shown) formed in the first side case 1A to support the frame 83. In addition, a cross section projecting from the inner side surface of the front wall of the first side case 1A supports a lower portion of the frame portion 83 with a semicircular projection 97.

The obliquely upwardly inclined portion at the center of the movable contact 4B is moved downward from the lower end of the separation wall 65 located slightly above the bottom of the first side case 1A toward the other end of the first side case 1A. The movable contact 4B is disposed between the partition wall 95 extending parallel to the bottom of the first side case 1A and extending from the parallel portion and inclined upwardly from the parallel portion.
The fixed contact 12B is arranged in the space where the fixed contact 12B is arranged via the four notches 14a. At this time, the movable contact 4B is fixed by sandwiching the rear end of the movable contact 4B with ribs 96 projecting from the lower surface of the parallel portion of the partition 95 and the bottom of the first side case 1A. Also, at this time, a semicircular rib 103 ′ protruding from the inner side surface of the first side case 1 </ b> A is fitted into the U-shaped bent portion between the rear end portion and the inner piece 80 and positioned.

Further, the first release plate 41 is connected to the torsion spring 60.
And the second tripping plate 41 is rotatably arranged at a fixed position.

In this way, the other than the intermediate case 7 and the terminal block 10B housed in the recess 9 of the intermediate case 7, the release handle 17 'and its return spring 21' are fitted into the first side case 1A side from the lateral direction. Then, 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 firstly assembled.
It arrange | positions so that it may overlap with the side case 1A side.

Here, when the intermediate case 7 is arranged at a fixed position on the first side case 1A side, the free end side of the movable contact 4A is arranged in the recess 34 through the opening 39 of the vertical wall 32 and Fixed contact 1 provided on terminal block 10A
2A is placed on the stepped surface 31a of the bottom wall 31, and the shaft 36 is
Will fit in.

On the other hand, the fixed contact 12B provided on the terminal block 10B is placed on the rib 26 on the bottom of the first side case 1A. The lower surface of the downward step formed at the end of the intermediate case 7 is placed on a flat surface formed on the end wall of the first side case 1A.

In this state, the second side case 1B is overlapped and connected to the first side case 1A side. At this time, the claw-shaped hooking portions 101 at the tips of four elastic locking pieces 100... Provided in the height direction, up and down and both end directions, respectively, are integrally protruded from the first side case 1A to the second side case 1B side. The first side case 1A and the second side case 1B are locked and fixed to the protruding hooked portion 102 provided corresponding to the second side case 1B side to form the body 1. When the first case 1A and the first case 1B are disengaged from each other, the driver 151 is inserted into the second case 1B from each release hole 150 opened corresponding to each hooked part 102. By pressing (suppressing) the hook portion 101 of the locking pieces 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. The direction of the hooked portion 102 corresponding to the hooking portion 101, that is, the hooking direction is different between the two sets located on the upper side of the body 1 and the two sets located on the lower side.
The position between the side cases 1A and 1B is hardly shifted upward or downward.

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

The heads of the adjusting screws 77 and 77 'corresponding to the bimetals 45 and 46 respectively face the opening 104 opening on the upper surface of the container 1 and the opening 105 opening on the bottom thereof. The operation adjusting screw 7 is provided through the openings 104 and 105 so that an optimum operation point can be obtained at the time of the operation test.
The initial positions of the bimetals 45 and 46 are adjusted by screwing the 7, 77 ', and after the adjustment, the upper cover 106 and the lower cover 106' are fitted into the respective portions of the body 1 by using elasticity. The openings 104 and 105 are covered. Here, the opening 104 is adjacent to the window hole 50 so that the operation unit 6a is arranged in FIG. 14 when the handle 6 is turned down, and together with the window hole 50, the first and second side cases 1A and 1B are formed. The handle projection is surrounded by a peripheral wall 112 formed on the upper surface. The upper surface of the elastic locking piece 100 provided on the upper side of the first side case 1A constituting the body 1 faces the upper surface position of the body 1 adjacent to the opening 104 outside the handle projection. The hole 111 is opened. At the base of the peripheral wall 112 on the side of the through hole 111, an insertion hole 113 communicating with the inside and outside of the handle projection is provided. When the upper cover 106 covers the opening 104 as described above, this insertion hole is used. 11
3, the front end of the upper cover 106 is inserted from the through hole 111 side, and the upper cover 106 is slid on the upward wall 115 between the opening 104 and the through hole 111, and
When it is moved to a position where it comes into contact with the standing wall 114 protruding from the opening edge of the window hole 50 on the fourth side, the rear end of the upper cover 106 just fits into the opening edge of the through hole 111 as shown in FIG. The movement of the upper cover 106 in the front-rear direction in the form of contacting the upper surface of the elastic locking piece 100 is restricted, and the upper cover 106 is held on the body 1. Therefore, as described above, the upper cover 106 simultaneously covers the opening 104 and the through hole 111.
And the elastic locking piece 100 facing the through hole 111 is inadvertently pressed (suppressed) with a jig or the like to prevent the hook 101 from being detached from the hook 102. .

The blade receiving spring portion 78 for sandwiching the conductive bar in the up-down direction is provided inside one end of the body 1 constituted by connecting the first and second side cases 1A and 1B as described above.
A conductive bar insertion groove 107, 108 is formed in one end of the body 1 so as to correspond to these blade receiving spring portions 78, 81, and is opened in a U-shape on the end face and both side faces of the body 1. Is formed.

A pair of electric wire insertion holes 16A and 16B opened obliquely upward are formed at the other end of the body 1 in parallel.

Further, the lower end surfaces of the wire insertion holes 16A and 16B are provided with the side walls of the two-sided cases 1A and 1B and the intermediate case 7.
An exhaust hole 109 for exhausting gas generated by opening and closing of the fixed contact 2B and the movable contact 3A disposed in the lower inner section of the two sections divided by the above and a locking hole 116 for mounting the body.
And fixed contact 2A arranged on the upper section as shown in FIG.
An exhaust hole 110 is opened to exhaust gas generated by opening and closing the movable contact 3A and obliquely upward.

The exhaust holes 109 and 110 are vertically separated from each other, and the directions facing the outside of the body 1 are separated from each other. Therefore, the discharge directions of the arcs generated at the time of the forced opening are different from each other. A short circuit between the electrodes due to mixing can be prevented.

When the load-side electric wires are inserted into the electric wire insertion holes 16A and 16B, respectively, and connected to the terminal blocks 10A and 10B, and the conductive bars are connected to the respective blade receiving spring portions 78, the present embodiment can be used as an electric circuit. A circuit breaker can be inserted.

In the state shown in FIG. 11 in which the upper cover 106 and the lower cover 106 'are attached and the assembly is completed as described above, a release hole 150 for releasing the hooking state of the hooking portion 101 and the hooked portion 102 is provided. First side, second side case 1
Since it is exposed on the side surfaces of A and 1B, there is a possibility that it is accidentally removed.

Therefore, in this embodiment, as shown in FIG. 12, at least the sealing material 1 for hiding these release holes 15 is used.
The circuit breaker is finally completed by attaching 17 to the outer surfaces of the first and second side cases 1A and 1B. This sealing material 117 is composed of a central piece 117a and a hanging piece 117b which is bent from both side edges of the central piece 117a and hung down.
Attaching the central piece 117a to the upper surface of the body 1,
The hanging pieces 117b, 117b on both sides are adhered to the outer surfaces of the first and second cases 1A, 1B, respectively, and the center piece 117a has a window hole 1 exposing the handle projection.
17c is provided. The portion of the central piece 117a located above the through hole 111 is adhered to the upper surface of the upper cover 106 to prevent the upper cover 106 from being accidentally removed.

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

FIG. 13 shows the off state. In this off state, the operating portion 6a of the handle 6 is in a state of being inverted and exposed from the window hole 50, and the connection between one end of the operating plate 43 and the first tripping plate 41 is established. The combined state is in the off state. The crossbar 40 is urged by the coil spring 62 so as to rotate clockwise in the figure.
The movable contact 4A inserted through the groove 4 has its free end moved upward, and the movable contact 4B inserted through the cut groove 55 has its free end moved upward by its spring elastic force. Contacts 3 at each free end
A, 3B are in a state of being separated from the corresponding fixed contacts 2A, 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 operation plate 43 by the lower shaft 44b. When the operating plate 43 is pressed down, one end (the right end in the figure) of the operating plate 43 hits the locking portion 57 of the first release plate 41, and the operating plate 43 rotates counterclockwise about the position as a rotation center, As shown in FIG. 21, the other end (left end) of the operation plate 43 hits a projection 84 provided at the upper end of the crossbar 40, and rotates the crossbar 40 counterclockwise against the bias of the spring.

By this rotation, the cut groove 55 of the crossbar 40 is formed.
The movable contact 4B inserted into the movable contact 4B is bent in a direction to move 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 contact 4A inserted through 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 more than the movable contact 3B contacts the fixed contact 2B.

When the handle 6 is further rotated clockwise, the position of the lower shaft 44b of the link 44 and the handle 6
The upper shaft 44b moves to the left as shown in FIG. 14 from the line connecting the centers of rotation, and in this state, the torsion spring 51 of the handle 6, the coil spring 62 for urging the crossbar 44,
Further, the spring force and the like of the movable contact 4B are balanced, so that the latch state between one end of the operation plate 43 and the locking portion 57 of the first release plate 41 is maintained, and the ON state in FIG. 14 is maintained.

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 turned on.
Is positioned above the line connecting the center of rotation of the handle 6 and the lower shaft 44b to the right, and moves upward to latch the left end of the operation plate 43 and the locking portion 57 of the first release plate 41. The crossbar 40 is rotated clockwise by the urging force of the coil spring 62, and the handle 6 is rapidly rotated back to the off side by the urging force of the torsion spring 51. The clockwise rotation of the crossbar 40 causes the movable contact 4A to rotate clockwise to move the free end upward, thereby separating the movable contact 3A from the fixed contact 2A. Further, the movable contact 4B is not depressed downward, and returns to the original state by the spring force, and the movable contact 3B at the free end is separated from the fixed contact 2B. This separation is later than the separation of the movable contact 3A from the fixed contact 2A. This delay is the same also at the time of forced opening described later.

Now, in the above ON state shown in FIG.
When an overcurrent flows through the load, the bimetals 45 and 46 generate heat due to the overcurrent and bend and displace. The bimetal 45 suspended from above is displaced so that the lower end moves leftward in the figure, and the bimetal 46 suspended
Is displaced so that the upper end moves to the right,
5 pushes the first drive section 69 of the first trip plate 41 leftward, and the upper end of the bimetal 46 pushes the second drive plate 42
Is pushed to the right. That is, the free ends of the bimetals 45 and 46 are displaced in directions away from each other. This displacement causes the first and second tripping plates 41 and 42 to rotate clockwise. At this time, the opposing portions 4 of the second tripping plate 42
2a pushes the receiving portion 59 of the first tripping plate 41 to apply clockwise turning power to the first tripping plate 41.

Here, since the directions of conduction of the bimetals 45 and 46 are opposite 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 bending displacement of the bimetals 45 and 46 can be made quick, and as a result, the forced opening can be made faster. This operation is also effective at the time of forcible opening by a short-circuit current described later.

Next, when the first release plate 41 rotates clockwise, the latching state between the locking portion 57 and one end (right end) of the operation plate 43 is released, and the operation plate 43 is connected to the lower shaft of the link 44. It will rotate clockwise around 44b. Therefore, the crossbar 40 by the other end (left end) of the operation plate 43
, 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, and to move the movable contacts 3A, 3B to the fixed contacts 2.
A and 2B are respectively separated.

Thereafter, the bimetals 45, 4
6 returns to the original state, the first release plate 41 is rotated back to the original position by the bias of the torsion spring 60, and at the same time, the receiving portion 59 pushes and moves the facing portion 42a of the second release plate 42. Return the second tripping plate 42 to its original position. The handle 6 is turned in the OFF direction (counterclockwise) 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 cores 74 and 74 ′ of the electromagnetic driving units 47 and 48 and the corresponding movable core 5
8, 67 is sucked and rocked. This makes the movable iron core 5
8 pushes the receiving portion 89 of the first tripping plate 41, and the driving portion 67 a of the movable iron core 67 pushes the tripping plate 4.
The second receiving portion 68 is pushed to rotate each of them in a clockwise direction.

When the first release plate 41 rotates clockwise in the same manner as when an overcurrent flows, the locking portion 57 and the operating plate 4
The latched state with one end (right end) of the operation plate 4 is released.
3 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 operation plate 43 is removed, and the crossbar 40 is rotated clockwise by the spring force of the coil spring 62 to return the movable contacts 4A and 4B to the off state. The movable contacts 3A, 3B are separated from the fixed contacts 2A, 2B, respectively.

Thereafter, the electromagnetic drive units 47, 4
When the magnetic force is no longer generated in the fixed iron cores 74, 74 'of FIG.
The movable iron cores 58 and 67 return to the original state by the spring force of the leaf spring, and the first release plate 41 returns to the original position by the bias of the torsion spring 60, and simultaneously pushes the second release plate 44. Move it back. The handle 6 is a torsion spring 5
By the urging of 1, it is turned in the off direction (counterclockwise).

Although the intermediate case 7 used in the present embodiment is fixed inside the body 1 so as to be sandwiched between the two cases 1A and 1B, it may be fixed using caulking pins.

[0074]

According to the first aspect of the present invention, there is provided a first side case in which components are arranged by side fitting from an opening on a side surface, and an opening of the first side case in a state where each component is fitted in the first side case. And a second side case attached so as to close the first side case and the second side case, and the other side of the first side case and the second side case on the other side of the first side case and the second side case. A plurality of protruding hook portions are provided, and hook portions on which the hook portions are hooked are provided on the other of the first side case and the second side case, and the jig is inserted from the outside in the direction of the hook portion. Since the release hole is formed to suppress the hooking part and release the hooking state with the hooked part when the hooking is performed, only the first side case and the second side case are hooked and attached. Can be easily connected, and the jig can be inserted through the release hole to suppress the hook. Operation and for releasing the hooking state, there is an effect that can not be easily remove.

According to a second aspect of the present invention, in the first aspect of the present invention, the hooking portion and the hooked portion are formed in at least four places in the height direction of each side case and at both ends. There is an effect that rattling between the cases is reduced, and the respective cases can be firmly attached.

According to a third aspect of the present invention, in the second aspect of the present invention, the hooking directions of the hooking portions and the hooked portions formed at the four locations are different from each other in the upper and lower directions. Alternatively, there is an effect that the position is hardly displaced in the downward direction, and the displacement between the respective cases is easily prevented.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, a through hole communicates with the upper surface of each of the side cases in at least one set direction of a plurality of hook portions and hook portions. And at least one set of the hooked portion and the hooked portion of the hooked portion face the through-hole, and the hooking portion is brought into contact with the hooked portion with the hooked portion hooked on the hooked portion, and the through-hole is formed. Since the closing cover is attached, after assembling between each side case, the cover will be attached, so even if a jig is inserted from the release hole, it is impossible to suppress the hooking part, so careless There is an effect that can be prevented from being removed.

According to a fifth aspect of the present invention, in the invention of the fourth aspect, a handle projection is provided on an upper surface of each of the side cases, and the through hole is connected from one end of the handle projection. Since the cover is formed and the insertion hole of the cover is formed, the cover can be inserted and attached from one end side of the handle projection, and the attachment work of the cover can be made one-touch to improve the assemblability. This has the effect.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, a sealing material for closing at least one of the release holes is attached to each of the side cases. By sticking the seal, there is an effect that careless removal can be prevented.

[Brief description of the drawings]

FIG. 1 is a rear view of a container according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a sectional view taken along the line AA in FIG. 3 of the above.

FIG. 5 is a sectional view taken along line BB of FIG.

FIG. 6 is a top view of the above.

FIG. 7 is a bottom view of the above.

FIG. 8 is an enlarged perspective view of the intermediate case.

FIG. 9 is an enlarged exploded perspective view in which a part of the crossbar portion is omitted.

FIG. 10 is a perspective view for explaining attachment of the upper cover in the above.

FIG. 11 is a perspective view after the upper cover is attached.

FIG. 12 is a perspective view after the same sticker is attached.

FIG. 13 is a state explanatory view of the above-mentioned off state.

FIG. 14 is an explanatory diagram of an ON state of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument body 1A 1st side case 1B 2nd side case 100 Elastic locking piece 101 Hook part 102 Hook part 150 Release hole 151 Driver

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshiya Nakamichi 1048 Kadoma Kadoma, Osaka Pref.Matsushita Electric Works, Ltd. (72) Inventor Tomoyuki Sawada 1048 Kadoma Kadoma, Kadoma, Osaka Pref. (72) Inventor Takashi Inatsu 1048 Kazuma Kadoma, Kazuma, Osaka Prefecture F-term in Matsushita Electric Works, Ltd. (reference) 5G030 BA02 BA06 XX12 5G052 AA11 BB07 HA01 HB05

Claims (6)

[Claims] 1. A first side case in which components are arranged by side fitting from an opening in a side surface, and the first side case is attached so that the opening of the first side case is closed in a state where the components are fitted in the first side case. A circuit breaker comprising: a plurality of hooks projecting to one of the first side case and the second side case and projecting to the other side of the first side case and the second side case. The first and second side cases are provided with hooked portions on which the hook portions are hooked, respectively, and communicate from the outside in the hooked portion direction to suppress the hooking portions when the jig is inserted. And a release hole for releasing a hooked state with the hooked portion. 2. The circuit breaker according to claim 1, wherein the hooking portion and the hooked portion are formed at at least four locations in the vertical direction of each side case and in both end directions. 3. The circuit breaker according to claim 2, wherein the hooking directions of the hooking portion and the hooked portion formed at the four locations are different from each other in the upper and lower directions. 4. An upper surface of each side case is provided with a through hole communicating with at least one of a plurality of hook portions and a hooked portion, and at least one set of the hook portion and the hook hook is formed in the through hole. A cover for closing the through-hole by contacting the hook portion with the hook portion facing the hook portion while facing the hook portion of the portion. 3
The circuit breaker according to any one of the above. 5. A handle projection for disposing a handle on an upper surface of each of the side cases, the through-hole is formed continuously from one end of the handle projection, and an insertion hole of the cover is formed. The circuit breaker according to claim 4, wherein: 6. The circuit breaker according to claim 1, wherein a seal member for closing at least one of the release holes is attached to each of the side cases.