TWI758695B - Pull-out circuit breaker - Google Patents

Abstract

A pull-out circuit breaker (100) is provided with a pull-out frame (3), a circuit breaker body (1), a pull-out mechanism portion (50), and a pull-out handle (60). The circuit breaker body (1) is connected to the pull-out frame (3) through a pull-out rail (4), and can be pulled out from the pull-out frame (3). The pull-out mechanism portion (50) pulls out the circuit breaker body (1) from the pull-out frame (3). The pull-out handle (60) is housed inside the pull-out mechanism portion (50).

Description

pull-out circuit breaker

The present invention relates to a pull-out type circuit breaker in which a circuit breaker body is accommodated in a pull-out frame so as to be able to be pulled out.

Conventionally, in a draw-out type circuit breaker, a draw-out handle is used in order to draw out the circuit breaker body accommodated in the draw-out frame from the draw-out frame. Such a pull-out handle is accommodated in the circuit breaker body during periods other than the pull-out operation in order to prevent loss or the like.

For example, Patent Document 1 proposes a pull-out circuit breaker in which a breaker body is provided with a storage space dedicated to a pull-out handle, and the handle is pulled out during periods other than the pull-out operation. It is stored in the storage space. In such a pull-out type circuit breaker, a pull-out mechanism portion is arranged at an interval between the circuit breaker body and the storage space dedicated to the pull-out handle, and the pull-out handle taken out from the storage space is connected to the pull-out handle. After the mechanism portion is pulled out, the circuit breaker body can be pulled out from the pull-out frame by rotating the pull-out handle.

[Prior Art Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2009-261238

However, in the technique described in Patent Document 1, since it is necessary to provide a dedicated storage space for accommodating the pull-out handle, there is a problem that the external dimension of the pull-out circuit breaker becomes large.

The present invention was developed in view of the above-mentioned problems, and an object of the present invention is to obtain a pull-out circuit breaker that can accommodate a pull-out handle in a circuit breaker body while suppressing an increase in size.

In order to solve the above-mentioned problems and achieve the object, a draw-out circuit breaker of the present invention includes a draw-out frame, a circuit breaker body, a draw-out mechanism, and a draw-out handle. The circuit breaker itself is connected to the pull-out frame by the pull-out rail, and can be pulled out from the pull-out frame. The pull-out mechanism part pulls out the circuit breaker body from the pull-out frame. The pull-out handle is accommodated inside the pull-out mechanism part.

According to the present invention, it is possible to achieve the effect that the pull-out handle can be accommodated in the circuit breaker body while suppressing the increase in size.

1: Circuit breaker body

2: Terminal device

3: Pull out the box

4: Pull out the track

5: Opening and closing mechanism

10: Frame

11: Molded Shell

12: Molded Cover

12a: Front

13: Handle

14: On button

15: Disconnect button

16: Frame

17: Guide plate

17a: long hole

18: Throw in the spring

21: Camshaft

22: Poised with a cam

22a: Cam side roller

22b: Cam surface

23: Ratchet

24: Poised Arm

24a, 26a, 30a: Fixed shaft

24b: Arm Side Roller

24c: Actuating Surface

24d: Snap hook pin

25: First closing latch

25a: Latch Side Roller

26: Second closing latch

26b, 54a, 55a, 71a: protrusions

26c: Engagement part

27: Close Stick

28: Spindle

28a: Arms for Insulated Linkages

28b: Arm for second link

29: Put in toggle linkage

29a: The first link

29b: Second Link

29c, 29d, 30b, 47: Pins

29e: Link side roller

30: Link lever

30c: Lever Side Roller

31: Trip latch

32: Jump Bar

41: Insulated connecting rod

42: Load side fixed conductor

43: Movable Contactor

43a: Movable contact

44: Fixed conductor on power supply side

44a: Fixed contacts

45: Flexible conductor

46: Contact pressure spring

50: Pull out the mechanism

51: Telescopic Mechanism Department

52, 60a: Extensions

53: Engagement recess

54: Pull out the handle storage part

54b: Opening

54c: Insertion port

54d: Recess

55: Pull out the handle shaft

60: Pull out the handle

60b: Head

70: Interlocking Mechanism Department

71: Interlock lever

80: Keeping Components

100: Pull out circuit breaker

Fig. 1 is an external perspective view of a pull-out circuit breaker according to Embodiment 1 of the present invention.

FIG. 2 is an external perspective view of a pull-out circuit breaker showing a state in which the circuit breaker body according to Embodiment 1 is pulled out from the pull-out frame.

Fig. 3 is an external perspective view of the pull-out circuit breaker in a state in which the circuit breaker body according to the first embodiment has been pulled out from the pull-out frame and the mold cover has been removed.

Fig. 4 is a cross-sectional view of the circuit breaker main body when the pull-out circuit breaker according to Embodiment 1 is in a trip state.

Fig. 5 is a cross-sectional view of the circuit breaker main body when the draw-out circuit breaker according to Embodiment 1 is in an open state where the charge has been completed (the spring 18 is in a compressed state).

Fig. 6 is a cross-sectional view of the circuit breaker main body when the draw-out circuit breaker according to Embodiment 1 is in a closed state (contacts are closed to be in an on state).

FIG. 7 is a schematic diagram showing the relationship between a main shaft, an insulating link arm, and an insulating link according to the first embodiment.

FIG. 8 is a partial cross-sectional view taken along line VIII-VIII shown in FIG. 1 .

Fig. 9 is a partial cross-sectional view showing a state of a pull-out mechanism portion and a pull-out handle when the pull-out circuit breaker according to the first embodiment is in the state shown in Fig. 1 .

Fig. 10 is a schematic diagram for explaining a method of taking out the pull-out handle from the pull-out mechanism part according to the first embodiment.

Fig. 11 is a schematic diagram for explaining a method of attaching the pull-out handle to the pull-out mechanism part according to the first embodiment.

Fig. 12 is a schematic diagram for explaining a pull-out method for pulling out the circuit breaker body from the pull-out frame by the pull-out handle and the pull-out mechanism of the first embodiment.

Fig. 13 is a schematic diagram showing the state of the pull-out handle and the pull-out mechanism when the circuit breaker body according to the first embodiment is inserted into the pull-out frame.

Fig. 14 is a side view of the interlock mechanism of the pull-out circuit breaker according to the first embodiment.

Fig. 15 is a schematic diagram showing a part of the configuration in the frame of the pull-out circuit breaker according to the first embodiment.

Fig. 16 is a schematic diagram showing the relationship between the pull-out handle accommodating portion and the interlock lever before the off button is pressed in according to the first embodiment.

Fig. 17 is a schematic diagram showing the relationship between the pull-out handle housing portion and the interlock lever in a state in which the OFF button according to the first embodiment has been pressed.

Fig. 18 is a schematic diagram showing the relationship between the pull-out handle housing portion and the interlock lever in a state in which the push-in of the OFF button according to the first embodiment has been released.

Hereinafter, the pull-out circuit breaker according to the embodiment of the present invention will be described in detail based on the drawings. In addition, this invention is not limited by this embodiment.

[Embodiment 1]

Fig. 1 is an external perspective view of a pull-out circuit breaker according to Embodiment 1 of the present invention. FIG. 2 is an external perspective view of a pull-out circuit breaker showing a state in which the circuit breaker body according to Embodiment 1 is pulled out from the pull-out frame. Fig. 3 is an external perspective view of the pull-out circuit breaker in a state in which the circuit breaker body according to the first embodiment has been pulled out from the pull-out frame and the mold cover has been removed. In addition, in FIGS. 1-3, the state which a part of the draw-out frame of a draw-out type circuit breaker was cut|disconnected is shown.

As shown in FIGS. 1 to 3, a draw-out circuit breaker 100 according to Embodiment 1 includes a circuit breaker main body 1 for opening and closing a circuit of a three-phase circuit, and a terminal device 2 for connecting On the circuit breaker body 1 ; and the pull-out frame 3 , which is provided with a terminal device 2 and accommodates the circuit breaker body 1 . Furthermore, as shown in FIGS. 2 and 3 , the pull-out circuit breaker 100 is provided with a retractable pull-out rail 4 that can pull out the circuit breaker body 1 from the pull-out frame 3 The circuit breaker body 1 and the pull-out frame 3 are connected. In addition, the pull-out circuit breaker 100 is, for example, a circuit breaker main body 1 which is accommodated in a frame of a closed switchboard (not shown) so as to be able to be pulled out.

Furthermore, in the plurality of drawings including FIGS. 1 to 3, for the sake of easy understanding of the description, a three-dimensional orthogonal coordinate system is shown, and the three-dimensional orthogonal coordinate system includes a vertical direction with a positive direction. The Z axis, the X axis in which the direction in which the circuit breaker body 1 is pulled out from the drawing frame 3 is the positive direction, and the Y axis orthogonal to the X axis and the Z axis, respectively. Hereinafter, the Z-axis positive direction may be described as the upward direction, and the Z-axis negative direction may be described as the downward direction. In some cases, the positive direction of the X-axis is described as the front direction, and the negative direction of the X-axis is described as the rear direction.

As shown in FIGS. 1 and 2 , the circuit breaker body 1 includes an insulating frame body 10 , and a pull-out mechanism 50 disposed at the lower portion of the frame body 10 for pulling out the circuit breaker body 1 from the frame body 10 . The frame 3 is pulled out; and the pull-out handle 60 is arranged on the pull-out mechanism part 50 so as to be able to be taken out to the outside. Moreover, as shown in FIG. 3, the circuit breaker main body 1 is provided with the opening and closing mechanism part 5 which is accommodated in the housing|casing 10, and performs opening and closing of a circuit (opening is off or break, and closing is on or make).

The frame body 10 has a mold case 11 and a mold cover 12 . On the front face 12a of the molded cover 12 are disposed: a handle 13 for accumulating power by manually inserting a spring 18 to be described later; an on button 14 for closing the circuit of the three-phase circuit ; And disconnect button 15 to make the circuit of the three-phase loop open. In addition, in the following, the case where the circuit is in the closed state by the circuit breaker body 1 may be simply described as the closed state, and the circuit is in the closed state. The case where the circuit breaker body 1 is in the open state is simply referred to as the open state. In addition, the operation performed by the circuit breaker main body 1 to change from the open state to the closed state may be described as the closing operation.

Fig. 4 is a cross-sectional view of the circuit breaker main body when the draw-out circuit breaker according to Embodiment 1 is in a tripped state. Fig. 5 is a cross-sectional view of the circuit breaker main body when the pull-out circuit breaker according to the first embodiment is in a state where the potential is completed. Fig. 6 is a cross-sectional view of the circuit breaker main body when the draw-out circuit breaker according to Embodiment 1 is in a closed state. In addition, in the following, the clockwise direction and the counterclockwise direction mean the clockwise direction and the counterclockwise direction in the drawings including FIGS. 4 to 6 .

As shown in FIG. 4 , the circuit breaker main body 1 includes: a load-side fixed conductor 42; a movable contactor 43 with a movable contact 43a arranged; and a power-side fixed conductor 44 with a fixed contact 44a arranged. Furthermore, the circuit breaker body 1 is provided with: a flexible conductor 45, one end of which is fixed to the frame body 10 and the other end of which is fixed to the movable contactor 43, and has flexibility; and a contact pressure spring 46, one end of which is attached to the frame body 10 , and the other end is mounted on the flexible conductor 45 . The load-side fixed conductor 42 and the power-side fixed conductor 44 are electrically connected by the flexible conductor 45 through the contact between the movable contact 43 a and the fixed contact 44 a. The movable contactor 43 in which the movable contact 43 a is arranged is driven by the opening and closing mechanism unit 5 .

The opening/closing mechanism unit 5 includes: a frame 16 fixed to the frame body 10; a cam shaft 21 rotatably supported by the frame 16; and a cam 22 and a ratchet 23 for accumulating , which are respectively fixed to the camshaft 21 . Fixed shafts 24a, 26a, 30a and the like are fixed to the frame 16 . The ratchet 23 rotates counterclockwise in conjunction with the rotation of the handle 13 when the front end of the handle 13 is operated in the arrow direction D shown in FIG. 4 .

Moreover, the opening and closing mechanism part 5 is provided with: a guide plate 17, one end of which is fixed to the frame 16 and extends upward; a throwing spring 18 is attached to the guide plate 17; and an L-shaped charge arm 24, The middle part thereof is rotatably supported by the fixed shaft 24a. A spring hook pin 24d provided at one end of the force-gathering arm 24 is inserted into the long hole 17a formed in the guide plate 17 . One end of the throw-in spring 18 is in contact with the spring hook pin 24d, and the other end is in contact with the frame 16 . Moreover, the arm side roller 24b provided in the other end of the energizing arm 24 is in contact with the cam surface 22b of the cam 22 for energizing. A cam-side roller 22 a is provided between the energizing cam 22 and the ratchet 23 .

Further, the opening and closing mechanism unit 5 includes: a first close latch 25 rotatably supported on the fixed shaft 24a; a second close latch 26 rotatably supported on the fixed shaft 26a; And a close bar 27, a part of which is formed in a semi-cylindrical shape. The front end of the first closing latch 25 abuts against the cam side roller 22a. The latch side roller 25 a provided in the middle part between the base end and the front end of the first closing latch 25 abuts against the lower end of the second closing latch 26 . A protruding portion 26b and an engaging portion 26c are formed on the lower end of the second closing latch 26 .

Since the second closing latch 26 receives a counterclockwise force by a resetting spring (not shown), the protruding portion 26b tends to rotate the first closing latch 25 clockwise. In the state shown in FIG. 4, the first closing latch 25 is in contact with the cam-side roller 22a, and the cam-side roller 22a acts as a stopper to hold the first closing latch 25 in an incapable state. state of rotation. Furthermore, the closing rod 27 is rotated in the clockwise direction according to the manual operation by the on button 14 or the on operation by a solenoid (solenoid) or the like.

FIG. 7 is a schematic diagram showing the relationship among the main shaft, the insulating link arm, and the insulating link according to Embodiment 1, and only a part of the structure of the opening and closing mechanism portion 5 is shown. As shown in FIG. 7 , the opening/closing mechanism unit 5 includes: a main shaft 28; an insulating link arm 28a fixed to the main shaft 28; and a second link arm 28b fixed to the main shaft 28 and disposed in the insulating connection Between the lever arms 28a. The arm 28a for insulating links is tied to the main shaft 28, and three base ends are arranged at equal intervals in the extending direction. The insulating link arm 28a and the second link arm 28b have the same shape as each other. The insulating link arm 28a is rotatably connected to one end of the insulating link 41 shown in FIG. 4 by a pin 47 . The other end of the insulating link 41 is connected to the movable contactor 43 .

As shown in FIG. 4, the opening/closing mechanism part 5 is provided with: a making toggle link mechanism 29; a link lever 30 rotatably supported on a fixed shaft 30a; A trip latch 31 is rotatably supported on the fixed shaft 26 a ; and a trip bar 32 is engaged with one end of the trip latch 31 . The throw-in toggle link mechanism 29 includes a first link 29a, a second link 29b, and pins 29c and 29d. One end of the first link 29a and one end of the second link 29b are connected by a pin 29d. The other end of the second link 29b is connected to the other end of the second link arm 28b by a pin 29c. One end of the link lever 30 is connected to the other end of the first link 29a by a pin 30b, and a lever-side roller 30c is provided in the middle part between one end and the center of rotation. The side surface of the tripping latch 31 is engaged with the lever side roller 30c.

Next, the energizing operation for converting the circuit breaker main body 1 from the trip state shown in FIG. 4 to the open state where the energization has been completed as shown in FIG. 5 will be described. In the jumping state shown in FIG. 4 after the release spring 18, when the handle 13 is pressed in the direction of the arrow D by manual operation, the ratchet 23, the cam shaft 21 and the cam 22 for accumulating will move toward the direction of the arrow D. counterclockwise direction rotation. Therefore, the arm-side roller 24b moves while rotating along the cam surface 22b, and the accumulating arm 24 rotates clockwise around the fixed shaft 24a. As a result, as shown in FIG. 5 , the snap hook pin 24d provided at one end of the energizing arm 24 moves downward to press the energizing spring 18 to charge the energizing spring.

When the accumulating cam 22 rotates counterclockwise, the first closing latch 25 rotates clockwise, and the latch side roller 25a is disengaged from the protrusion 26b of the second closing latch 26 . As a result, since the lower end of the second closing latch 26 is free, the latching portion 26c and the latching of the first closing latch 25 are rotated counterclockwise by the return spring (not shown). The buckle-side roller 25a is engaged to stop the counterclockwise rotation. Moreover, the closing rod 27 rotates counterclockwise by the return spring which is not shown, and becomes the state shown in FIG. 5, and the clockwise rotation of the 2nd closing latch 26 is prevented.

In addition, since the actuating surface 24c moves downward by the clockwise rotation of the accumulating arm 24, the link-side roller of the toggle link mechanism 29 is fed by applying the bending force of the toggle link mechanism 29. 29e will follow the downward movement of the actuating surface 24c. Therefore, since the first link 29a of the input toggle link mechanism 29 moves downward and the pin 30b moves downward, the link lever 30 rotates counterclockwise, and the lever side roller 30c also rotates counterclockwise . Thereby, the tripping latch 31 is rotated clockwise by the return spring, and as shown in FIG. It is rotated clockwise by a return spring (not shown). In the state shown in FIG. 5 , the trip bar 32 functions as a stopper for preventing the counterclockwise rotation of the trip latch 31 .

In addition, the cam 22 for accumulating power will be in the state shown in FIG. 5 after it rotates about one turn by several pressing operations of the handle 13 . In the state shown in FIG. 5, since the snap hook pin 24d is pushed upward by the releasing force of the throwing spring 18, although the force in the counterclockwise direction is applied to the accumulating arm 24, the closing rod 27 is pushed upward by the releasing force of the throwing spring 18. A closing latch 25 and a second closing latch 26 function as stoppers. Therefore, the counterclockwise rotation of the poised arm 24 can be prevented.

In the state shown in FIG. 5, when the ON button 14 shown in FIGS. 1 and 2 is pressed, the closing rod 27 is rotated clockwise, and the second The lock of the closing latch 26 is released. The unlocked second closing latch 26 is rotated clockwise, and the engaging portion 26c and the latch side roller 25a are disengaged. Therefore, since the cam 22 for accumulating is rotated counterclockwise while the first closing latch 25 is rotated counterclockwise by the cam side roller 22a, the arm side roller 24b falls into the cam 22 for accumulating. The step portion of the cam surface 22b.

The accumulating arm 24 is rotated counterclockwise by the releasing force of the throwing spring 18 , and the link-side roller 29e of the actuating surface 24c that is about to throw the toggle link mechanism 29 bounces upward. Since the tripping latch 31 is locked to move in the counterclockwise direction by the tripping rod 32 , the throwing toggle link mechanism 29 is extended, and the second link arm 28b is rotated in the counterclockwise direction. Thereby, as shown in FIG. 6, in the circuit breaker main body 1, the movable contact 43a and the fixed contact 44a are brought into contact, and the circuit is brought into a closed state. Furthermore, in the state shown in FIG. 6, although the link lever 30 is provided with a clockwise rotational force through the push-in toggle link mechanism 29 and the pin 30b by contacting the pressure spring 46, it is Rod 32 prevents counterclockwise rotation of link lever 30 .

Next, the pull-out mechanism portion 50 and the pull-out handle 60 will be described. The breaker body 1 is pulled out from the accommodated state shown in FIG. 1 to the pulled state shown in FIG. 2 by the pull-out mechanism 50 and the pull-out handle 60 . FIG. 8 is a partial cross-sectional view taken along line VIII-VIII shown in FIG. 1 .

As shown in Figs. 1, 2, 3 and 8, the pull-out mechanism portion 50 includes: a telescopic mechanism portion 51 that expands and contracts so as to be able to be pulled out from the circuit breaker body 1, and an extension portion 52 that basically The end is connected to the telescopic mechanism part 51; A male thread is formed at the front end of the extension portion 52 , and a female thread is formed inside the engaging recessed portion 53 . Since the engagement recessed part 53 is for inserting the front end of the extension part 52 in which the male thread is formed, it is sometimes referred to as an insert screw. In the state shown in FIG. 8, the male thread formed at the front end of the extension portion 52 is in a state in which the female thread formed in the interior of the engaging recessed portion 53 is engaged, and the extending portion 52 is engaged with the engaging recessed portion 53. Therefore, the circuit breaker body 1 cannot be pulled out from the pull-out frame 3 .

The retractable mechanism portion 51 includes a pull-out handle storage portion 54 that accommodates the pull-out handle 60 inside so that it can be taken out to the outside, and a pull-out handle shaft portion 55 that holds the pull-out handle storage portion 54 so as to be able to be taken out. It is pulled out from the circuit breaker body 1 along the extension direction of the pull-out handle, that is, the front-rear direction.

The pull-out handle accommodating portion 54 and the pull-out handle shaft portion 55 are both formed in a cylindrical shape, and the outer diameter of the pull-out handle shaft portion 55 is smaller than the inner diameter of the pull-out handle accommodating portion 54 . In the state shown in FIG. 8, the drawer handle shaft portion 55 is accommodated in the drawer handle housing portion 54 after the drawer handle 60 is accommodated therein. The retractable mechanism portion 51 is configured such that the pull-out handle accommodating portion 54 in which the pull-out handle 60 is accommodated is capable of being pulled out to the outside of the housing 10 and rotatable. The frame body 10 is held by the holding member 80 . Furthermore, the retractable mechanism portion 51 may be configured such that the inner diameter of the pull-out handle shaft portion 55 is larger than the outer diameter of the pull-out handle housing portion 54 .

Fig. 9 is a partial cross-sectional view showing a state of a pull-out mechanism portion and a pull-out handle when the pull-out circuit breaker according to the first embodiment is in the state shown in Fig. 1 . Fig. 10 is a schematic diagram for explaining a method of taking out the pull-out handle from the pull-out mechanism part according to the first embodiment. Fig. 11 is a schematic diagram for explaining a method of attaching the pull-out handle to the pull-out mechanism part according to the first embodiment. Fig. 12 is a schematic diagram for explaining a pulling method of pulling out the circuit breaker body from the pulling frame by the pulling handle and the pulling mechanism of the first embodiment. Fig. 13 is a schematic diagram showing the state of the pull-out handle and the pull-out mechanism when the circuit breaker body according to the first embodiment is inserted into the pull-out frame. In addition, in FIGS. 9 to 13, a part of the structure of the expansion-contraction mechanism part 51 is shown as a cross-sectional view for easy understanding.

When the pull-out circuit breaker 100 is in the state shown in FIG. 1, the pull-out mechanism part 50 and the pull-out handle 60 are in the state shown in FIG. 9, and the pull-out handle 60 is accommodated in the pull-out mechanism The inside of the telescopic mechanism part 51 of the part 50 . When the circuit breaker body 1 is pulled out from the pull-out frame 3 from the state shown in FIG. 1 , as shown in FIG. 10 , the pull-out handle accommodating portion 54 is directed toward the mold cover 12 from the pull-out mechanism portion 50 . Pull out before.

A hexagonal protruding portion 54a is formed on the inner peripheral surface of the proximal end of the drawer handle housing portion 54, and a hexagonal protruding portion 55a is formed on the outer peripheral surface of the front end of the drawing handle shaft portion 55. The state shown in FIG. 10 is a state in which the protrusion 54a of the pull-out handle accommodating portion 54 is engaged with the protrusion 55a of the pull-out handle shaft portion 55, and the pull-out handle accommodating portion 54 can be prevented from advancing further forward. pull out. Thereby, the pull-out handle accommodating portion 54 can be prevented from falling off from the pull-out handle shaft portion 55 .

Next, as shown in FIG. 11 , after the drawer handle 60 is taken out from the opening 54b in front of the front end of the drawer handle accommodating portion 54, the drawer handle 60 is inserted into the front end of the drawer handle accommodating portion 54. A pair of insertion ports 54c. The pull-out handle 60 includes an extension portion 60a that extends in one direction from the base end toward the front end, and a head portion 60b that is continuous with the base end of the extension portion 60a.

The outer diameter of the extension portion 60a is smaller than the inner diameter of the pair of insertion openings 54c provided in the pull-out handle housing portion 54, and is inserted through the pair of insertion openings 54c. Such a pair of insertion openings 54c are provided at positions facing each other in a direction orthogonal to the pull-out direction in which the circuit breaker body 1 is pulled out from the pull-out frame 3 . In addition, since the outer diameter of the head portion 60b is larger than the outer diameter of the pair of insertion ports 54c, the extension portion 60a can be inserted into the pair of insertion ports 54c by pulling out the handle accommodating portion 54. The head 60b is buckled. Thereby, the drawer handle 60 can be attached to the drawer handle accommodating portion 54 .

From the state shown in FIG. 11 , the extension portion of the male thread can be pulled out from the engaging recess 53 having a female thread inside by rotating the pull-out handle 60 in the first direction with the pull-out handle shaft portion 55 as the axis center. 52 front end. As a result, as shown in FIG. 12 , the engagement between the circuit breaker body 1 and the pull-out frame 3 by the pull-out mechanism 50 is released, and the circuit breaker body 1 can be pulled out from the pull-out frame 3 . The pull-out state shown in Figure 2. Furthermore, the first direction refers to one of the clockwise direction and the counterclockwise direction, and this direction is determined by the above-mentioned constitution of the male thread and the female thread.

In addition, when the pull-out circuit breaker 100 is to be changed from the state shown in FIG. 2 to the state shown in FIG. 1, the circuit breaker body 1 is pushed backward, and the pull-out mechanism part 50 is shown in FIG. 13 status shown. That is, the front end of the extension portion 52 is brought into a state in which the engaging recessed portion 53 is already in contact with each other. In this state, when the pull-out handle 60 is moved toward the pull-out handle shaft portion 55 as the axis center When rotated in the second direction, which is the opposite direction to the first direction described above, the front end of the extension portion 52 can be rotatably inserted into the engaging recessed portion 53, and the state shown in FIG. 11 is obtained, and the circuit breaker body 1 The state of being inserted into the pull-out frame 3.

Furthermore, the draw-out circuit breaker 100 of the first embodiment includes an interlock mechanism that allows the circuit breaker body 1 to be pulled out from the draw-out frame 3 only when the circuit breaker body 1 is in the open state. FIG. 14 is a side view of the interlock mechanism of the pull-out circuit breaker according to the first embodiment, and FIG. 15 is a schematic view showing a part of the structure in the frame of the pull-out circuit breaker according to the first embodiment.

As shown in FIG. 14, the interlock mechanism part 70 is attached to the frame 16, and has the interlock lever 71 which makes the pull-out handle accommodating part 54 into a locked state. As shown in FIG. 15 , the interlock mechanism portion 70 is linked to the off button 15 so as to be interlocked, and the interlock mechanism portion 70 is driven by pressing the off button 15 .

Fig. 16 is a schematic diagram showing the relationship between the pull-out handle housing portion and the interlock lever before the OFF button according to the first embodiment is pushed in. Fig. 17 is a schematic diagram showing the relationship between the pull-out handle housing portion and the interlock lever in a state in which the OFF button according to the first embodiment has been pressed. Fig. 18 is a schematic diagram showing the relationship between the pull-out handle housing portion and the interlock lever in a state where the push-in of the OFF button according to the first embodiment has been released.

When the circuit breaker body 1 is in the closed state, as shown in FIG. 16 , the interlock lever 71 is in contact with the pull-out handle accommodating portion 54 , and movement of the pull-out handle accommodating portion 54 is prohibited. For example, as shown in FIG. 10, a recessed portion 54d is formed in the pull-out handle accommodating portion 54, the protrusion 71a of the interlock lever 71 is inserted into the concave portion 54d, and the pull-out handle accommodating portion 54 is locked in the interlock Lever 71. Thereby, the movement of the pull-out handle accommodating portion 54 can be inhibited. Furthermore, by The locking of the pull-out handle accommodating portion 54 by the interlock lever 71 is not limited to the provision of the concave portion 54 d in the pull-out handle accommodating portion 54 . For example, a protruding portion may be provided in the pull-out handle housing portion 54, and the protruding portion 71a of the interlock lever 71 may be brought into contact with such a protruding portion.

In the state shown in Fig. 16, when the disconnect button 15 of the circuit breaker body 1 is pushed backward, as shown in Fig. 17, the interlock lever 71 is pulled up, and the interlock lever 71 is pulled upward. The engagement with the pull-out handle accommodating portion 54 is disengaged. In this state, the pull-out handle accommodating portion 54 can be pulled out to the state shown in FIG. 17 . In this way, the interlock mechanism portion 70 is engaged with the pull-out handle accommodating portion 54 when the circuit breaker body 1 is in the closed state, and the pull-out of the pull-out handle accommodating portion 54 is prohibited. Thereby, the breaker body 1 in the closed state can be prevented from being pulled out from the pull-out frame 3 .

After that, when the push-in of the disconnect button 15 is released, the interlock lever 71 is lowered, and as shown in FIG. , the pull-out handle receiving portion 54 is fastened to the interlock lever 71 . Furthermore, the interlock mechanism portion 70 may be configured to maintain the interlock lever 71 in the state shown in FIG. 18 when the push-in of the off button 15 is released.

In the pulled-out state of the circuit breaker body 1, there are a connection position, a test position, a disconnection position, and a pulled-out position. The connection position is the position in which the circuit breaker body 1 has been accommodated in the pull-out frame 3, and is the position shown in FIG. 1 . The pull-out position is the position where the circuit breaker body 1 has been pulled out from the pull-out frame 3, and is the position shown in FIG. 2 . The test position and the disconnection position are the positions between the pull-out position and the connection position, and the test position is closer to the connection position than the disconnection position. When the circuit breaker body 1 is in the test position, it means that a control circuit not shown is connected, and The position where the electrical ON and OFF operations of the circuit breaker body 1 can be performed. In addition, when the circuit breaker main body 1 is located in a disconnecting position, the control circuit which is not shown in figure is not connected.

The interlock mechanism portion 70 prohibits the closing operation of the circuit breaker body 1 when the circuit breaker body 1 is pulled out from the pull-out frame 3 by the pull-out mechanism portion 50 and the pull-out handle 60 . For example, the interlock mechanism portion 70 is provided with a lock lever (not shown) so as to prohibit the ON button 14 from being pushed in when the breaker body 1 starts to be pulled out from the pull-out frame 3 . The locking lever locks the ON button 14 according to the position of the circuit breaker body 1 , thereby prohibiting the closing action of the circuit breaker body 1 when the circuit breaker body 1 is pulled out from the pull-out frame 3 .

In addition, the interlock mechanism portion 70 is stored in the circuit breaker body 1 in a state in which the circuit breaker body 1 is pulled out to the test position or the disconnection position, and the pull-out mechanism portion 50 in the state where the pull-out handle 60 is accommodated therein. In the case of , the prohibition of the closing operation of the circuit breaker body 1 can be released. For example, the above-mentioned lock lever, which is not shown, is accommodated in the circuit breaker body 1 by the pull-out mechanism portion 50 in which the pull-out handle 60 is accommodated therein, thereby releasing the latching of the ON button 14 . Thereby, the closing operation of the circuit breaker body 1 can be performed when the circuit breaker body 1 is located at the test position or the disconnecting position. The test position and the disconnection position are examples of specific positions.

The interlocking mechanism portion 70 has a driving mechanism that drives the locking lever according to the position of the circuit breaker body 1 and the state of the pull-out handle 60 and the pull-out mechanism portion 50, for example. Release the prohibition of the closing action of the circuit breaker body 1. The drive mechanism can determine the position of the circuit breaker body 1 according to the retractable state of the pull-out rail 4 . In addition, the drive mechanism has a contact piece that is interlocked with the lock lever inside the pull-out handle shaft portion 55 of the pull-out mechanism portion 50, and the pull-out mechanism portion 50 in the state where the pull-out handle 60 is housed inside is accommodated in the circuit breaker In the case of the main body 1 , the contact piece is pushed by the pull-out handle 60 . When the contact pad is When the pull-out handle 60 is pushed, the locking lever will move to the position where the on-button 14 is released. In addition, the drive mechanism which drives a lock lever is not limited to the above-mentioned example, For example, the structure containing a cam, a link, a gear (gear), etc. may be sufficient.

In addition, the interlock mechanism portion 70 can cancel the prohibition of the closing operation of the circuit breaker main body 1 when it is in the state shown in FIG. 1 . That is, the interlock mechanism portion 70 can be released when the circuit breaker body 1 is accommodated in the pull-out frame 3 and the pull-out mechanism portion 50 in the state where the pull-out handle 60 is accommodated therein is accommodated in the circuit breaker body 1 . The closing action of the circuit breaker body 1 is prohibited. For example, the lock lever (not shown) described above releases the hold of the ON button 14 by accommodating the pull-out mechanism portion 50 in which the pull-out handle 60 is accommodated in the circuit breaker body 1 .

As described above, the pull-out circuit breaker 100 according to the first embodiment includes the pull-out frame 3 , the breaker body 1 , the pull-out mechanism portion 50 , and the pull-out handle 60 . The circuit breaker main body 1 is connected to the pull-out frame 3 by the pull-out rail 4 and can be pulled out from the pull-out frame 3 . The pull-out mechanism portion 50 pulls out the circuit breaker body 1 from the inside of the pull-out frame 3 . The pull-out handle 60 is accommodated inside the pull-out mechanism portion 50 . Thereby, the pull-out handle 60 can be accommodated in the breaker main body 1 while suppressing the enlargement of the pull-out circuit breaker 100 .

Further, the pull-out mechanism portion 50 includes a telescopic mechanism portion 51 having a pull-out handle housing portion 54 and a pull-out handle shaft portion 55 , an extension portion 52 , and an engaging recessed portion 53 . The drawer handle accommodating part 54 accommodates the drawer handle 60 inside. The pull-out handle shaft portion 55 holds the pull-out handle housing portion 54 so as to be able to be pulled out from the circuit breaker body 1 . The base end of the extension portion 52 is connected to the pull-out handle shaft portion 55 , and a male thread is formed at the front end located in the direction opposite to the pull-out direction of the circuit breaker body 1 . The engaging recess 53 is fixed to the pull-out frame 3 and has a female thread. The thread is inserted into the male thread of the extension portion 52 in a state where the circuit breaker body 1 is accommodated in the pull-out frame 3 . Thereby, the pull-out mechanism part 50 can be comprised with a comparatively simple structure.

In addition, the draw-out circuit breaker 100 has an interlock mechanism portion 70 that engages with the draw-out handle housing portion 54 to prohibit the draw-out handle housing when the circuit breaker body 1 is in a closed state. Part 54 is pulled out. Thereby, when the circuit breaker body 1 is in the closed state, the operation of pulling out the circuit breaker body 1 from the pull-out frame 3 can be prevented.

In addition, the interlock mechanism portion 70 prohibits the closing operation of the circuit breaker body 1 when the circuit breaker body 1 is pulled out from the pull-out frame 3 . Thereby, when the circuit breaker body 1 is pulled out from the pull-out frame 3, the circuit breaker body 1 can be prevented from being changed from the open state to the closed state.

In addition, the interlock mechanism portion 70 is stored in a state in which the circuit breaker body 1 is pulled out from the pull-out frame 3 to a specific position, and the pull-out mechanism portion 50 in a state in which the pull-out handle storage portion 54 is housed therein is accommodated In the case of the circuit breaker body 1, the prohibition of the closing operation of the circuit breaker body 1 is released. Thereby, for example, the circuit breaker body 1 can be changed from the open state to the closed state in a state where the circuit breaker body 1 is pulled out to the test position.

In addition, the interlock mechanism portion 70 is in a state where the breaker body 1 is housed in the pull-out frame 3 and the pull-out mechanism portion 50 in a state where the pull-out handle 60 is housed inside is housed in the breaker body 1 . Next, the prohibition of the closing operation of the circuit breaker body 1 is released. Thereby, the loss of the pull-out handle 60 can be precisely prevented.

The configuration shown in the above embodiment is only an example of the content of the present invention, and can be combined with other known techniques, and a part of the configuration can be omitted or changed without departing from the gist of the present invention.

1: Circuit breaker body

2: Terminal device

3: Pull out the box

4: Pull out the track

10: Frame

11: Molded Shell

12: Molded Cover

12a: Front

13: Handle

14: On button

15: Disconnect button

50: Pull out the mechanism

60: Pull out the handle

100: Pull out circuit breaker

Claims (4)

A pull-out circuit breaker, comprising: a pull-out frame; a circuit breaker body connected to the pull-out frame by a pull-out rail, so as to be able to be pulled out from the pull-out frame; and a pull-out mechanism for pulling The circuit breaker body is pulled out from the pull-out frame; the handle is pulled out, which is accommodated in the pull-out mechanism part; It holds the pull-out handle accommodating portion so as to be able to be pulled out from the circuit breaker body; the extension portion, the base end of which is connected to the pull-out handle shaft portion, is located at the front end in the opposite direction of the pull-out direction of the circuit breaker body. A male thread is formed; an engaging recess is fixed to the pull-out frame and has a female thread for inserting the male thread of the extension part when the circuit breaker body is accommodated in the pull-out frame and the interlocking mechanism part, when the interrupter body is in a closed state, is engaged with the pull-out handle receiving part to prohibit the pull-out of the pull-out handle receiving part; the interlocking mechanism part is provided with An interlock lever, which is in contact with the pull-out handle accommodating portion when the circuit breaker body is in a closed state, so that the pull-out handle accommodating portion is in a locked state; the pull-out circuit breaker further comprises: The disconnect button is used to release the locking state of the aforementioned pull-out handle receiving portion. The pull-out circuit breaker according to claim 1, wherein the interlock mechanism section prohibits the closing operation of the circuit breaker body when the circuit breaker body starts to be pulled out from the pull-out frame. The pull-out circuit breaker according to claim 1 or 2, wherein the interlocking mechanism part is in a state in which the circuit breaker body is pulled out from the pull-out frame to a specific position, and when pulling When the pull-out mechanism portion in the state in which the pull-out handle is housed therein is housed in the circuit breaker body, the prohibition of the closing operation of the circuit breaker body is released. The pull-out circuit breaker according to claim 1 or 2, wherein the interlocking mechanism part is in a state where the circuit breaker body is accommodated in the pull-out frame, and the pull-out is accommodated inside. When the pull-out mechanism part in the state of pulling out the handle is accommodated in the circuit breaker body, the prohibition of the closing operation of the circuit breaker body is released.

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