JP2021190321A - Drawer type circuit breaker - Google Patents

Abstract

To obtain a drawer type circuit breaker capable of improving a stability of an operation of an interlock mechanism.SOLUTION: An interlock mechanism of a drawer type circuit breaker, comprises: a handle lock pin 63; and an interlock lever 62. The handle lock pin 63 interferes an insertion into a drawer mechanism part 50 of a drawer handle. The interlock lever 62 can insert the drawer handle into the drawer mechanism part 50 by rotating the handle lock pin 63 in conjunction with an operation to an open button. The interlock lever 62 comprises: an extension part 62a; and a bent part 62b. The extension part 62a extends it toward an operation part 63c contacted to the interlock lever 62 of the handle lock pin 63. The bent part 62b is bent to an extension direction of a rotational axis 63d of the handle lock pin 63 from the extension part 62a to be contacted to the operation part 63c.SELECTED DRAWING: Figure 16

Description

The present disclosure relates to a drawer type circuit breaker in which the circuit breaker main body is housed in a drawer frame so that the circuit breaker can be pulled out.

Conventionally, a drawer type circuit breaker including a drawer frame and a circuit breaker main body which is connected to the drawer frame via a drawer rail and can be pulled out from the drawer frame is known. In such a drawer type circuit breaker, the circuit breaker main body is pulled out from the drawer frame by inserting the drawer handle into the drawer mechanism portion and rotating the drawer handle.

Patent Document 1 discloses a drawer type circuit breaker configured so that the circuit breaker main body cannot be pulled out from the drawer frame when the electric circuit is in a closed state. In such a drawer type circuit breaker, the insertion of the drawer handle into the drawer mechanism portion is prevented when the electric circuit is closed, and the drawer handle is operated to the drawer mechanism portion when the open button for opening the electric circuit is operated. An interlock mechanism that allows insertion is provided.

In the interlock mechanism described in Patent Document 1, the insertion of the drawer handle into the circuit breaker main body is prevented by the handle lock pin when the electric circuit is closed. In such an interlock mechanism, the interlock lever moves while abutting on the handle lock pin in response to an operation to the open button that opens the electric circuit, so that the operation portion of the handle lock pin slides the end of the interlock lever. By moving, the handle lock pin rotates, and the drawer handle can be inserted into the circuit breaker body.

Japanese Unexamined Patent Publication No. 2003-308764

However, in the conventional interlock mechanism, when the handle lock pin is supported so as to be movable in the rotation axis direction, when the handle lock pin moves in the rotation axis direction, the contact area of the interlock lever with the handle lock pin is increased. It may be insufficient and the operation of the interlock mechanism may become unstable.

The present disclosure has been made in view of the above, and an object of the present invention is to obtain a drawer type circuit breaker capable of improving the stability of operation of the interlock mechanism.

In order to solve the above-mentioned problems and achieve the object, the drawer type circuit breaker of the present disclosure includes a drawer frame, a circuit breaker main body, a drawer mechanism unit, and an interlock mechanism. The circuit breaker body is connected to the drawer frame via a drawer rail, and can be pulled out from the drawer frame. In the drawer mechanism unit, the drawer handle is inserted from the outside, and the circuit breaker body is moved from the drawer frame to the withdrawal direction of the circuit breaker body and the insertion direction of the circuit breaker body into the drawer frame as the drawer handle moves. The interlock mechanism regulates the insertion of the drawer handle into the drawer mechanism section. The interlock mechanism includes a handle lock pin and an interlock lever. The handle lock pin prevents the drawer handle from being inserted into the pull-out mechanism portion by abutting on the pull-out handle. The interlock lever rotates the handle lock pin in conjunction with the operation of the open button to enable the drawer handle to be inserted into the drawer mechanism portion. The interlock lever includes a stretched portion and a bent portion. The stretched portion is stretched toward the operation portion of the handle lock pin that comes into contact with the interlock lever. The bent portion bends from the extended portion in the direction of the rotation axis of the handle lock pin and comes into contact with the operation portion.

According to the present disclosure, there is an effect that the stability of the operation of the interlock mechanism can be improved.

External perspective view of the drawer type circuit breaker according to the first embodiment. An external perspective view showing a drawer type circuit breaker in a state where the circuit breaker main body according to the first embodiment is pulled out from the drawer frame. External perspective view of the drawer type circuit breaker in the state where the circuit breaker main body according to the first embodiment is pulled out from the drawer frame and the mold cover is removed. Cross-sectional view of the circuit breaker main body when the drawer type circuit breaker according to the first embodiment is in the trip state. Cross-sectional view of the circuit breaker main body in the open state when the drawer type circuit breaker according to the first embodiment is in the open state where charging is completed. Sectional drawing of the circuit breaker main body in the case where the drawer type circuit breaker which concerns on Embodiment 1 is a closed state Front view showing an example of the internal configuration of the circuit breaker main body according to the first embodiment. The figure which shows the relationship of the main shaft, the arm for insulation link, and the insulation link which concerns on Embodiment 1. The figure which shows an example of the structure of the drawer handle which concerns on Embodiment 1. A cross-sectional view taken along the line X-X shown in FIG. The figure which shows the relationship between the handle lock pin and a drawer handle when the open button of the circuit breaker main body which concerns on Embodiment 1 is not pressed. The figure which shows the mode that the circuit breaker main body is pulled out from the drawer frame by the drawer handle when the open button of the circuit breaker main body which concerns on Embodiment 1 is pressed. A side view showing an example of a part of the internal configuration of the circuit breaker main body according to the first embodiment. Front view showing an example of a part of the internal configuration of the circuit breaker main body in the state where the open button of the circuit breaker main body according to the first embodiment is not pressed. Front view showing an example of a part of the internal configuration of the circuit breaker main body in the state where the open button of the circuit breaker main body according to the first embodiment is pressed. Front view of a part of FIG. 14 enlarged Side view of a part of FIG. 13 enlarged Enlarged view of the region of reference numeral D shown in FIG. Enlarged view of the region of reference numeral C shown in FIG.

Hereinafter, the drawer type circuit breaker according to the embodiment will be described in detail with reference to the drawings.

Embodiment 1.
FIG. 1 is an external perspective view of the drawer type circuit breaker according to the first embodiment. FIG. 2 is an external perspective view showing a drawer type circuit breaker in a state where the circuit breaker main body according to the first embodiment is pulled out from the drawer frame. FIG. 3 is an external perspective view of a drawer type circuit breaker in a state where the circuit breaker main body according to the first embodiment is pulled out from the drawer frame and the mold cover is removed. It should be noted that FIGS. 1 to 3 show a state in which a part of the drawer frame of the drawer type circuit breaker is cut.

As shown in FIGS. 1 to 3, the drawer type circuit breaker 100 according to the first embodiment includes a circuit breaker main body 1 that opens and closes an electric circuit of a three-phase circuit, and a terminal device 2 connected to the circuit breaker main body 1. , A terminal device 2 is arranged, and a drawer frame 3 for accommodating a circuit breaker main body 1 is provided. Further, as shown in FIGS. 2 and 3, the drawer type circuit breaker 100 is a telescopic drawer rail 4 that connects the circuit breaker main body 1 and the drawer frame 3 so that the circuit breaker main body 1 can be pulled out from the drawer frame 3. To prepare for. The drawer type circuit breaker 100 is, for example, housed in a housing of a closed switchboard (not shown) so that the circuit breaker main body 1 can be pulled out.

Further, as shown in FIGS. 1 and 2, the drawer type circuit breaker 100 has a drawer handle (not shown) inserted from the outside, and as the drawer handle moves, the circuit breaker body 1 is pulled out from the drawer frame 3 and the circuit breaker body 1 is pulled out. A drawer mechanism unit 50 for moving the circuit breaker main body 1 into the drawer frame 3 in the insertion direction is provided.

In addition, in a plurality of drawings including FIGS. 1 to 3, in order to make the explanation easy to understand, the Z axis in which the vertical upward direction is the positive direction and the X in the direction in which the breaker main body 1 is pulled out from the drawer frame 3 are the positive directions. A three-dimensional Cartesian coordinate system including an axis and a Y-axis orthogonal to the X-axis and the Z-axis are shown. In the following, the positive direction of the Z axis may be referred to as the upward direction, and the negative direction of the Z axis may be referred to as the downward direction. Further, the positive direction of the X-axis may be described as the front direction, and the negative direction of the X-axis may be described as the rear direction. Further, the positive direction of the Y-axis may be described as the right direction, and the negative direction of the Y-axis may be described as the left direction.

The circuit breaker main body 1 includes an insulating housing 10 as shown in FIGS. 1 and 2. The housing 10 has a mold case 11 and a mold cover 12. On the front surface 12a of the mold cover 12, a handle 13 for manually accumulating the charging spring 18 described later, a closing button 14 for closing the electric circuit of the three-phase circuit, and an electric circuit of the three-phase circuit are opened. An open button 15 for making a state is arranged.

Further, as shown in FIG. 3, the circuit breaker main body 1 includes an opening / closing mechanism portion 5 housed in a housing 10 for opening / closing an electric circuit. In the following, the case where the electric circuit is closed by the circuit breaker main body 1 may be simply described as a closed state, and the case where the electric circuit is open by the circuit breaker main body 1 may be simply described as an open state. Further, the operation from the open state to the closed state performed by the circuit breaker main body 1 may be described as a closed operation.

FIG. 4 is a cross-sectional view of the circuit breaker main body when the drawer type circuit breaker according to the first embodiment is in the trip state. FIG. 5 is a cross-sectional view of a circuit breaker main body when the drawer type circuit breaker according to the first embodiment is in an open state in which charging is completed. FIG. 6 is a cross-sectional view of the circuit breaker main body when the drawer type circuit breaker according to the first embodiment is in the closed state. FIG. 7 is a front view showing an example of the internal configuration of the circuit breaker main body according to the first embodiment. In the following, clockwise and counterclockwise mean clockwise and counterclockwise 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 contact 43 in which the movable contact 43a is arranged, and a power supply-side fixed conductor 44 in which the fixed contact 44a is arranged. Further, the circuit breaker main body 1 has a flexible flexible conductor 45 having one end fixed to the load-side fixed conductor 42 and the other end fixed to the movable contactor 43, and one end attached to the housing 10. The other end includes a pressure spring 46 attached to the flexible conductor 45. When the movable contact 43a and the fixed contact 44a come into contact with each other, the load-side fixed conductor 42 and the power supply-side fixed conductor 44 are electrically connected via the flexible conductor 45. The movable contactor 43 in which the movable contact 43a is arranged is driven by the opening / closing mechanism portion 5. The movable contact 43 may be configured to include a flexible conductor 45.

The opening / closing mechanism portion 5 includes a frame 16 fixed to the housing 10, a camshaft 21 rotatably supported by the frame 16, and a charging cam 22 and a ratchet 23 fixed to the camshaft 21, respectively. 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 tip of the handle 13 is operated in the direction indicated by the arrow E shown in FIG.

Further, the opening / closing mechanism portion 5 is rotatably supported by a guide plate 17 having one end fixed to the frame 16 and extending upward, a feed spring 18 attached to the guide plate 17, and an intermediate portion rotatably supported by the fixed shaft 24a. It is provided with an L-shaped charge arm 24. The spring hook pin 24d provided at one end of the charge arm 24 is inserted into the elongated hole 17a formed in the guide plate 17. One end of the input spring 18 abuts on the spring hook pin 24d, and the other end abuts on the frame 16. Further, the arm-side roller 24b provided at the other end of the charge arm 24 comes into contact with the cam surface 22b of the charging cam 22. A cam-side roller 22a is provided between the charging cam 22 and the ratchet 23.

Further, the opening / closing mechanism portion 5 includes a first closed latch 25 rotatably supported by the fixed shaft 24a, a second closed latch 26 rotatably supported by the fixed shaft 26a, and a part thereof is a semicircular columnar shape. It is provided with a closed bar 27 formed in. The tip of the first closed latch 25 comes into contact with the cam-side roller 22a. The latch-side roller 25a provided in the middle between the base end and the tip end of the first closed latch 25 abuts on the lower end of the second closed latch 26. A protruding portion 26b and an engaging portion 26c are formed at the lower end of the second closed latch 26.

Since the second closed latch 26 receives a counterclockwise force by a return spring (not shown), the protrusion 26b tries to rotate the first closed latch 25 clockwise. In the state shown in FIG. 4, the first closed latch 25 is in contact with the cam-side roller 22a, and the cam-side roller 22a serves as a stopper to hold the first closed latch 25 in a non-rotatable state. The close bar 27 is rotated clockwise by a manual operation by the close button 14 shown in FIG. 7 or an on operation by a solenoid or the like.

FIG. 8 is a diagram showing the relationship between the main shaft, the insulating link arm, and the insulating link according to the first embodiment, and only a part of the configuration of the opening / closing mechanism portion 5 is shown. As shown in FIG. 8, the opening / closing mechanism portion 5 is located between the main shaft 28, the insulating link arm 28a fixed to the main shaft 28, and the insulating link arm 28a fixed to the main shaft 28. A two-link arm 28b is provided. The insulating link arm 28a has three base ends arranged at equal intervals along the stretching direction on the main shaft 28. The insulating link arm 28a and the second link arm 28b have the same shape. 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 contact 43.

As shown in FIG. 4, the opening / closing mechanism portion 5 includes a closing toggle link mechanism 29, a link lever 30 rotatably supported by the fixed shaft 30a, and a trip latch 31 rotatably supported by the fixed shaft 26a. A trip bar 32 that engages with one end of the trip latch 31 is provided. The input 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 the 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 between one end and the center of rotation. The side surface of the trip latch 31 engages with the lever side roller 30c.

Next, a storage operation for shifting the circuit breaker main body 1 from the trip state shown in FIG. 4 to the open state in which the charge is completed shown in FIG. 5 will be described. The charge means the accumulation of the input spring 18. In the trip state shown in FIG. 4 in which the charging spring 18 is released, when the handle 13 is manually pushed down in the direction indicated by the arrow E, the ratchet 23, the camshaft 21, and the charging cam 22 rotate counterclockwise. .. Therefore, the arm-side roller 24b moves while rotating along the cam surface 22b, and the charge arm 24 rotates clockwise around the fixed shaft 24a. As a result, as shown in FIG. 5, the spring hook pin 24d provided at one end of the charge arm 24 moves downward to store the charging spring 18.

Further, when the charging cam 22 rotates counterclockwise, the first closed latch 25 rotates clockwise, and the latch side roller 25a is disengaged from the protruding portion 26b of the second closed latch 26. As a result, the lower end of the second closed latch 26 becomes free, so that the second closed latch 26 is rotated counterclockwise by a return spring (not shown), and the engaging portion 26c engages with the latch side roller 25a of the first closed latch 25. Then the counterclockwise rotation stops. Further, the close bar 27 is rotated counterclockwise by a return spring (not shown) to be in the state shown in FIG. 5, and prevents the second close latch 26 from rotating clockwise.

Further, since the operating surface 24c moves downward due to the clockwise rotation of the charge arm 24, the link-side roller 29e of the charging toggle link mechanism 29 moves downward due to the bending force of the charging toggle link mechanism 29. Follow the movement. Therefore, the first link 29a of the input toggle link mechanism 29 moves downward and the pin 30b moves downward, so that the link lever 30 rotates counterclockwise and the lever side roller 30c also rotates counterclockwise. .. As a result, the trip latch 31 is rotated clockwise by the return spring, and as shown in FIG. 5, the lever-side roller 30c is engaged with the recess of the trip latch 31, and the trip bar 32 is clocked by the return spring (not shown). Rotate around. In the state shown in FIG. 5, the trip bar 32 functions as a stopper that prevents the trip latch 31 from rotating counterclockwise.

The charging cam 22 is rotated substantially once by pushing down the handle 13 several times, and finally reaches the state shown in FIG. In the state shown in FIG. 5, since the spring hook pin 24d is pushed upward by the release force of the input spring 18, a counterclockwise force is applied to the charge arm 24, but the first close latch 25 and the second close are closed. The close bar 27 functions as a stopper via the latch 26. Therefore, the counterclockwise rotation of the charge arm 24 is prevented.

When the close button 14 shown in FIG. 7 is pressed in the state shown in FIG. 5, the close bar 27 rotates clockwise, and the lock of the second close latch 26 by the close bar 27 is released. The second closed latch 26 that has been unlocked rotates clockwise, and the engaging portion 26c and the latch-side roller 25a are disengaged. Therefore, the charging cam 22 rotates counterclockwise while rotating the first close latch 25 counterclockwise by the cam side roller 22a, so that the arm side roller 24b is on the cam surface 22b of the charging cam 22. It falls into the step.

The charge arm 24 is rotated counterclockwise by the release force of the charging spring 18, and the operating surface 24c flips up the link-side roller 29e of the charging toggle link mechanism 29. Since the trip latch 31 is locked to move counterclockwise by the trip bar 32, the input toggle link mechanism 29 extends and rotates the second link arm 28b counterclockwise. As a result, as shown in FIG. 6, in the circuit breaker main body 1, the movable contact 43a and the fixed contact 44a come into contact with each other, and the electric circuit is closed. In the state of FIG. 6, the link lever 30 is given a clockwise rotational force by the contact pressure spring 46 via the input toggle link mechanism 29 and the pin 30b. Therefore, the trip latch 31 is pressed counterclockwise via the lever-side roller 30c, but the trip latch 31 is prevented from rotating counterclockwise by the trip bar 32, so that the link lever 30 rotates clockwise. Be blocked.

When the circuit breaker main body 1 is in the state shown in FIG. 6, when the open button 15 shown in FIG. 7 is pressed, the trip bar 32 rotates counterclockwise, and the trip latch 31 rotates clockwise to the link lever 30. Rotates counterclockwise. Therefore, the lever-side roller 30c comes off from the recess of the trip latch 31, and the link lever 30 rotates clockwise. As a result, the pin 30b at the other end of the charging toggle link mechanism 29 moves upward, and the charging toggle link mechanism 29 bends. At this time, the link-side roller 29e of the charging toggle link mechanism 29 moves to the left along the operating surface 24c of the charge arm 24, and the pin 29c drives the insulating link 41 to the left to move the movable contact 43 to the left. To operate. Therefore, the movable contact 43a is separated from the fixed contact 44a, and the circuit breaker main body 1 returns to the open state shown in FIG.

As shown in FIG. 7, the drawer type circuit breaker 100 is provided with an interlock mechanism 60 that prevents insertion of a drawer handle (not shown) into a drawer mechanism portion 50 when the electric circuit is closed. Hereinafter, the configurations of the drawer handle, the drawer mechanism portion 50, and the interlock mechanism 60 will be specifically described.

First, the configuration of the drawer handle will be described. FIG. 9 is a diagram showing an example of the configuration of the drawer handle according to the first embodiment. As shown in FIG. 9, the drawer handle 70 according to the first embodiment is formed in a T shape and includes a shaft portion 71 and a handle 72. The shaft portion 71 has a stretched portion 71a whose one end is connected to the central portion of the handle 72 and a tip portion 71b which is continuous with the other end of the stretched portion 71a and is formed in a hexagonal shape. Be prepared.

Next, the configuration of the withdrawal mechanism unit 50 will be described. FIG. 10 is a cross-sectional view taken along the line X-X shown in FIG. As shown in FIG. 10, the pull-out mechanism portion 50 includes a front panel 51, a support portion 52, a main screw 53, a compression spring 54, and an insert screw 55. The front panel 51, the support portion 52, and the main screw 53 are provided in the circuit breaker main body 1, and the insert screw 55 is provided in the drawer frame 3.

The front panel 51 is formed with an insertion port 51a having a circular opening, and the shaft portion 71 of the drawer handle 70 is inserted into the inside of the drawer mechanism portion 50 from the insertion port 51a. The support portion 52 supports the main screw 53 so as to be movable in the front-rear direction. The support portion 52 is also referred to as an indicator frame.

The main screw 53 includes a tubular portion 53a in which the engaging portion 53a1 is formed, a screw portion 53b in which the male screw portion 53b1 is formed, and a ring portion 53c movably attached to the outer periphery of the screw portion 53b. The engaging portion 53a1 is a hole formed in a hexagonal shape, into which the tip portion 71b of the drawer handle 70 is inserted and engages with the tip portion 71b. A compression spring 54 is arranged between the tubular portion 53a and the ring portion 53c, and the movement of the ring portion 53c in the rear direction is restricted. Therefore, when the tubular portion 53a is pushed in the backward direction, the tubular portion 53a is urged in the forward direction by the compression spring 54.

The insert screw 55 is formed with a screw hole 55a, and the male screw portion 53b1 of the main screw 53 is inserted into the screw hole 55a to engage with the main screw 53.

FIG. 10 shows a part of the interlock mechanism 60. The interlock mechanism 60 restricts the insertion of the drawer handle 70 into the drawer mechanism portion 50. The interlock mechanism 60 rotates the handle lock pin 63 rotatably supported by the support portion 52 and the handle lock pin 63 in conjunction with the user's operation on the open button 15 shown in FIG. 7, and the drawer mechanism portion. Includes an interlock lever 62 that releases the obstruction of insertion of the drawer handle 70 into 50.

FIG. 11 is a diagram showing the relationship between the handle lock pin and the drawer handle when the open button of the circuit breaker main body according to the first embodiment is not pressed. FIG. 12 is a diagram showing how the circuit breaker main body is pulled out from the drawer frame by the drawer handle when the open button of the circuit breaker main body according to the first embodiment is pressed.

When the open button 15 shown in FIG. 7 is not pressed, when the operator tries to insert the tip portion 71b of the shaft portion 71 of the drawer handle 70 into the engaging portion 53a1 of the tubular portion 53a of the main screw 53, the handle The lock pin 63 is present at a position where it comes into contact with the tip end portion 71b of the drawer handle 70. Therefore, as shown in FIG. 11, the insertion of the tip portion 71b of the drawer handle 70 into the engaging portion 53a1 is prevented.

When the open button 15 shown in FIG. 7 is pressed, the handle lock pin 63 is present at a position where it does not abut on the shaft portion 71 of the drawer handle 70. Therefore, as shown in the frame A of FIG. 12, the operator can insert the tip portion 71b of the shaft portion 71 of the drawer handle 70 into the engaging portion 53a1 of the main screw 53.

Then, the operator rotates the handle 72 of the drawer handle 70 around the shaft portion 71 to rotate the main screw 53, thereby disengaging the male screw portion 53b1 from the insert screw 55. be able to. After the male screw portion 53b1 and the insert screw 55 are disengaged, as shown in the frame B of FIG. 12, the operator pulls out the circuit breaker main body 1 by moving the pull-out handle 70 forward. It can be pulled out from the frame 3.

Further, when the circuit breaker main body 1 is accommodated in the drawer frame 3, the operator inserts the tip portion 71b of the drawer handle 70 into the engaging portion 53a1 of the main screw 53, and then moves the drawer handle 70 in the rear direction. It is inserted into the male screw portion 53b1 and the insert screw 55. After that, the operator rotates the handle 72 of the drawer handle 70 around the shaft portion 71 to rotate the main screw 53, and engages the male screw portion 53b1 with the insert screw 55 to engage the main body of the circuit breaker. 1 can be accommodated in the drawer frame 3.

Next, the interlock mechanism 60 will be described. FIG. 13 is a side view showing an example of a part of the internal configuration of the circuit breaker main body according to the first embodiment. FIG. 14 is a front view showing an example of a part of the internal configuration of the circuit breaker main body in a state where the open button of the circuit breaker main body according to the first embodiment is not pressed. FIG. 15 is a front view showing an example of a part of the internal configuration of the circuit breaker main body in a state where the open button of the circuit breaker main body according to the first embodiment is pressed.

As shown in FIG. 13, the interlock mechanism 60 according to the first embodiment includes a close arm 61, an interlock lever 62, and a handle lock pin 63. The close arm 61 is rotatably supported by the frame 16 via a rotation shaft 64. When the open button 15 is pushed backward, the close arm 61 rotates counterclockwise in FIG. 13 about the rotation shaft 64. The interlock lever 62 extends in the vertical direction, one end of which is rotatably connected to the close arm 61, and the other end of which is in contact with the handle lock pin 63. The interlock lever 62 moves upward as the close arm 61 rotates counterclockwise.

As shown in FIG. 14, the interlock lever 62 includes a stretched portion 62a and a bent portion 62b. The handle lock pin 63 includes a lock portion 63a, a rotating portion 63b, and an operation portion 63c. The extension portion 62a of the interlock lever 62 extends downward from the base end connected to the close arm 61 toward the operation portion 63c of the handle lock pin 63. The bent portion 62b of the interlock lever 62 bends from the stretched portion 62a in the left-right direction, which is the stretching direction of the rotation shaft 63d of the handle lock pin 63, and comes into contact with the operating portion 63c. The bent portion 62b is formed by, for example, bending. Hereinafter, the stretching direction of the rotating shaft 63d may be referred to as the rotating shaft direction. In the example shown in FIG. 14, the bent portion 62b bends to the left, but may be configured to bend to the right.

The lock portion 63a is formed in a cylindrical shape, and the rotating portion 63b is inserted therein. The rotating portion 63b has a U-shaped central portion inserted into the inside of the lock portion 63a, and one end and the other end are rotatably supported by the support portion 52. Further, a handle lock spring 65 is bridged between the other end of the rotating portion 63b and the support portion 52, and the lock portion 63a is urged around the rotating shaft 63d by the handle lock spring 65.

Further, the operating portion 63c is formed in an L shape and is continuous with the rotating portion 63b. The operation unit 63c is extended in a direction orthogonal to the rotation axis 63d and then bent in a direction along the rotation axis 63d. In order to facilitate the rotation of the handle lock pin 63, a gap is provided between the support portion 52 that supports the rotating portion 63b and the operation portion 63c. The lock portion 63a and the rotating portion 63b may be integrated, and the handle lock pin 63 has a configuration in which the rotating portion 63b is also used as the lock portion without providing the lock portion 63a. May be good.

In the state shown in FIGS. 13 and 14, the lock portion 63a of the handle lock pin 63 exists in the front direction of the engaging portion 53a1 of the main screw 53. Therefore, in the drawer type circuit breaker 100, it is possible to prevent the tip portion 71b of the drawer handle 70 from being erroneously inserted into the engaging portion 53a1 of the main screw 53 when the open button 15 is not pressed in the circuit breaker main body 1. be able to.

In the state shown in FIGS. 13 and 14, when the open button 15 is pushed backward, the open button 15 abuts on the close arm 61, and when the open button 15 is further pushed, the close arm 61 is centered on the rotation shaft 64. It rotates counterclockwise in FIG.

When the close arm 61 rotates counterclockwise in FIG. 13, the interlock lever 62 moves upward, which is the direction indicated by the reference numeral F in FIG. When the interlock lever 62 moves upward, the handle lock pin 63 rotates about the rotation shaft 63d by the urging force of the handle lock spring 65. As a result, as shown in FIG. 15, since the lock portion 63a of the handle lock pin 63 moves downward, the lock portion 63a does not exist in the front direction of the engagement portion 53a1 of the main screw 53. Therefore, in the state shown in FIG. 15, the tip portion 71b of the drawer handle 70 can be inserted into the engaging portion 53a1 of the main screw 53.

The interlock lever 62 is urged downward by a return spring (not shown) in the direction opposite to the direction indicated by reference numeral F in FIG. 13, and the operator releases the open button 15 from the state shown in FIG. Then, the interlock lever 62 moves downward. When the interlock lever 62 moves downward, the operation portion 63c of the handle lock pin 63 is pushed downward by the bent portion 62b of the interlock lever 62. Therefore, the operation portion 63c of the handle lock pin 63 slides on the bent portion 62b of the interlock lever 62, and as shown in FIG. 14, the lock portion 63a of the handle lock pin 63 is in front of the engaging portion 53a1 of the main screw 53. Move in the direction.

FIG. 16 is an enlarged front view of a part of FIG. 14. FIG. 17 is an enlarged side view of a part of FIG. 13. As shown in FIGS. 16 and 17, the operation portion 63c of the handle lock pin 63 has a first extension portion 63c1 that is continuous with one end of the rotation portion 63b and extends in a direction orthogonal to the rotation axis 63d, and a first extension portion 63c1. A second stretching portion 63c2 that is continuously stretched in a direction along the rotation axis 63d is provided. When the second stretched portion 63c2 is pushed by the interlock lever 62, the first stretched portion 63c1 rotates about the rotation shaft 63d, and the state shown in FIGS. 16 and 17 is obtained.

Of the bent portion 62b of the interlock lever 62, the surface of the interlock lever 62 in contact with the second extending portion 63c2 is a flat surface. Therefore, the contact of the interlock lever 62 with the second stretched portion 63c2 is performed by surface contact by the bent portion 62b of the interlock lever 62. As shown in FIG. 16, in the left-right direction, the length of the bent portion 62b is longer than the length of the stretched portion 62a. Therefore, the interlock lever 62 has a engagement with the second stretched portion 63c2, that is, the second stretched portion 63c2, as compared with the case where the stretched portion 62a is brought into contact with the second stretched portion 63c2 without providing the bent portion 62b. The contact area of the can be increased. Therefore, for example, even when the handle lock pin 63 moves in the left-right direction by the gap between the operation portion 63c and the support portion 52, the bent portion 62b is in contact with the second extension portion 63c2. Be maintained. Therefore, in the drawer type circuit breaker 100, the stability of the operation of the interlock mechanism 60 can be improved.

Here, consider a case where the interlock lever 62 is not provided with the bent portion 62b. In this case, the end surface of the extended portion 62a of the interlock lever 62 abuts on the operating portion 63c, but the end surface of the extended portion 62a of the interlock lever 62 is a fracture surface. When the operation portion 63c of the handle lock pin 63 slides on the fracture surface of the interlock lever 62, the sliding operation of the handle lock pin 63 with respect to the interlock lever 62 becomes unstable due to the variation in the sliding friction, and the interlock lever 62. Restoration operation may become unstable. The return operation of the interlock lever 62 is an operation in which the interlock lever 62 moves upward after the operator releases the open button 15. The return operation of the interlock lever 62 can be stabilized by increasing the load of the return spring (not shown) that urges the interlock lever 62, but it is made larger than the load for operating the close button 14. It is not possible. On the other hand, in the drawer type circuit breaker 100, the contact of the interlock lever 62 with the second extending portion 63c2 is performed by the surface contact by the bent portion 62b of the interlock lever 62, so that the interlock lever of the handle lock pin 63 is contacted. The sliding operation with respect to 62 can be stabilized.

The contact position of the bent portion 62b with the second stretched portion 63c2 changes with the vertical movement of the interlock lever 62. That is, as the interlock lever 62 moves in the vertical direction, the second stretched portion 63c2 slides on the bent portion 62b. In the interlock mechanism 60, as described above, since the contact area of the interlock lever 62 with the second stretched portion 63c2 is increased, the sliding of the second stretched portion 63c2 with respect to the bent portion 62b is stabilized. Can be done. Therefore, in the drawer type circuit breaker 100, the stability of the operation of the interlock mechanism 60 can be improved.

For example, it is assumed that the interlock mechanism 60 is in the state shown in FIG. 16 and the stretched portion 62a is in direct contact with the second stretched portion 63c2. In this case, when the closed arm 61 moves to the left, the contact area of the stretched portion 62a with the second stretched portion 63c2 decreases, and the handle lock pin 63 cannot be stably rotated by the closed arm 61. There is. On the other hand, in the circuit breaker main body 1, even if the handle lock pin 63 moves to the left, the state in which the bent portion 62b is in contact with the second extending portion 63c2 is maintained. Therefore, in the drawer type circuit breaker 100, the stability of the operation of the interlock mechanism 60 can be improved.

Further, in the interlock mechanism 60, when the close arm 61 moves downward, the bent portion 62b moves to the left, which is the direction away from the support portion 52. As a result, in the circuit breaker main body 1, even if the closed arm 61 moves to the left, the state in which the bent portion 62b is in contact with the second extending portion 63c2 is maintained more stably. Therefore, in the drawer type circuit breaker 100, the stability of the operation of the interlock mechanism 60 can be further improved.

FIG. 18 is an enlarged view of the region of reference numeral D shown in FIG. FIG. 19 is an enlarged view of the region of reference numeral C shown in FIG. As shown in FIG. 18, the extended portion 62a of the interlock lever 62 is formed with a convex portion 62a1 projecting to the right, which is the direction toward the frame 16. The convex portion 62a1 is formed, for example, by embossing the stretched portion 62a. The convex portion 62a1 is arranged in the groove portion 16a1 formed in the frame 16 when the open button 15 is pressed. The groove portion 16a1 is a region formed in a concave shape in the surface 16a facing the stretched portion 62a of the interlock lever 62 in the frame 16, and is located at a position farther from the stretched portion 62a than the flat portion 16a2. Further, the groove portion 16a1 has an inclined surface that approaches the flat portion 16a2 in the left-right direction toward the lower side, and the convex portion 62a1 slides on the inclined surface.

When the operator releases the open button 15 from the state shown in FIG. 18, the interlock lever 62 moves in the direction opposite to the direction indicated by the reference numeral F in FIG. 13, so that the convex portion 62a1 is moved from the inside of the groove portion 16a1. It moves and becomes a position where it comes into contact with the flat portion 16a2 of the frame 16 as shown in FIG. That is, since the convex portion 62a1 projects toward the facing surface 16a of the frame 16, the handle lock pin 63 is the drawer handle 70 from a position where the handle lock pin 63 does not prevent the drawer handle 70 from being inserted into the drawer mechanism portion 50. When the position is changed to prevent the insertion into the extraction mechanism portion 50, the position is moved from the position in the groove portion 16a1 to the position in contact with the flat portion 16a2. Therefore, the bent portion 62b moves to the left in FIG. As a result, in the circuit breaker main body 1, even if the closed arm 61 moves to the left, the state in which the bent portion 62b is in contact with the second extending portion 63c2 is maintained more stably. Therefore, in the drawer type circuit breaker 100, the stability of the operation of the interlock mechanism 60 can be further improved.

Further, as shown in FIG. 17, the contact surface of the bent portion 62b with the operating portion 63c is in the front-rear direction which is orthogonal to each of the moving direction of the interlock lever 62 and the rotation axis direction of the handle lock pin 63. On the other hand, it has an inclination angle θ1. That is, the contact surface of the bent portion 62b with respect to the operating portion 63c is inclined upward toward the rear direction. As a result, the interlock mechanism 60 has a second extending portion 63c2 with respect to the bent portion 62b when the interlock lever 62 moves downward, as compared with the case where the bent portion 62b does not have the inclination angle θ1. It is suppressed that the position in the anteroposterior direction in which the lever contacts is suddenly changed. Therefore, in the drawer type circuit breaker 100, the stability of the operation of the interlock mechanism 60 can be further improved.

As described above, the drawer type circuit breaker 100 according to the first embodiment is connected to the drawer frame 3 via the drawer frame 3 and the drawer rail 4, and the circuit breaker main body 1 can be pulled out from the drawer frame 3. The drawer mechanism unit 50 and the interlock mechanism 60 are provided. In the drawer mechanism portion 50, the drawer handle 70 is inserted from the outside, and as the drawer handle 70 moves, the circuit breaker main body 1 is pulled out from the drawer frame 3 and the circuit breaker main body 1 is inserted into the drawer frame 3. Move the circuit breaker body 1. The interlock mechanism 60 restricts the insertion of the drawer handle 70 into the drawer mechanism portion 50. The interlock mechanism 60 includes a handle lock pin 63 and an interlock lever 62. The handle lock pin 63 prevents the drawer handle 70 from being inserted into the drawer mechanism portion 50. The interlock lever 62 rotates the handle lock pin 63 in conjunction with the user's operation on the open button 15 to enable the drawer handle 70 to be inserted into the drawer mechanism portion 50. The interlock lever 62 includes a stretched portion 62a and a bent portion 62b. The extending portion 62a extends toward the operating portion 63c of the handle lock pin 63 that abuts on the interlock lever 62. The bent portion 62b bends from the extending portion 62a in the direction of the rotation axis of the handle lock pin 63 and comes into contact with the operating portion 63c. As a result, in the drawer type circuit breaker 100, the contact of the interlock lever 62 with the second stretched portion 63c2 is performed by the surface contact by the bent portion 62b of the interlock lever 62. Therefore, the interlock lever 62 can increase the contact area with the second stretched portion 63c2 as compared with the case where the stretched portion 62a is brought into contact with the second stretched portion 63c2 without providing the bent portion 62b. Thereby, in the drawer type circuit breaker 100, the stability of the operation of the interlock mechanism 60 can be improved. Further, in the drawer type circuit breaker 100, the contact of the interlock lever 62 with the operation unit 63c is performed by the surface contact by the operation unit 63c of the interlock lever 62, so that the handle lock pin 63 with respect to the interlock lever 62. The sliding operation can be stabilized.

Further, the drawer type circuit breaker 100 includes a frame 16 in which a groove portion 16a1 and a flat portion 16a2 are formed on a facing surface 16a facing the interlock lever 62. The stretched portion 62a includes a convex portion 62a1. The convex portion 62a1 projects toward the facing surface 16a of the frame 16, and when the handle lock pin 63 is changed from a position that does not restrict the insertion of the drawer handle 70 into the extraction mechanism portion 50 to a position that restricts the insertion of the drawer handle 70, the groove portion It moves from the position in 16a1 to the position where it abuts on the flat portion 16a2. As a result, in the circuit breaker main body 1, even if the closed arm 61 moves in the rotation axis direction, the state in which the bent portion 62b is in contact with the second extending portion 63c2 is maintained more stably. Therefore, in the drawer type circuit breaker 100, the stability of the operation of the interlock mechanism 60 can be further improved.

Further, the bent portion 62b of the drawer type circuit breaker 100 has a surface that comes into contact with the operating portion 63c in a front-rear direction that is orthogonal to each of the moving direction of the interlock lever 62 and the rotation axis direction of the handle lock pin 63. Formed at an angle. As a result, the interlock mechanism 60 is prevented from suddenly changing the position where the second extending portion 63c2 comes into contact with the bent portion 62b when the interlock lever 62 moves downward. Therefore, in the drawer type circuit breaker 100, the stability of the operation of the interlock mechanism 60 can be further improved.

The configuration shown in the above embodiment is an example, and can be combined with another known technique, or a part of the configuration may be omitted or changed without departing from the gist. It is possible.

1 Breaker body, 2 terminal device, 3 drawer frame, 4 drawer rail, 5 opening / closing mechanism, 10 housing, 11 mold case, 12 mold cover, 12a front, 13 handle, 14 close button, 15 open button, 16 frame , 16a facing surface, 16a1 groove, 16a2 flat part, 17 guide plate, 17a long hole, 18 input spring, 21 cam shaft, 22 charging cam, 22a cam side roller, 22b cam surface, 23 ratchet, 24 charge arm, 24a. , 26a, 30a Fixed shaft, 24b arm side roller, 24c working surface, 24d spring hook pin, 25 first closed latch, 25a latch side roller, 26 second closed latch, 26b protrusion, 26c, 53a1 engaging part , 27 Close bar, 28 Main shaft, 28a Insulated link arm, 28b 2nd link arm, 29 Input toggle link mechanism, 29a 1st link, 29b 2nd link, 29c, 29d, 30b, 47 pin, 29e link side Roller, 30 link lever, 30c lever side roller, 31 trip latch, 32 trip bar, 41 insulated link, 42 load side fixed conductor, 43 movable contact, 43a movable contact, 44 power supply side fixed conductor, 44a fixed contact, 45 possible Flexible conductor, 46 pressure spring, 50 drawer mechanism, 51 front panel, 51a insertion slot, 52 support, 53 main screw, 53a cylinder, 53b screw, 53b1 male thread, 53c ring, 54 compression spring, 55 insert screw, 55a screw hole, 60 interlock mechanism, 61 close arm, 62 interlock lever, 62a, 71a extension part, 62a1 convex part, 62b bending part, 63 handle lock pin, 63a lock part, 63b rotating part, 63c Operation part, 63c1 first extension part, 63c2 second extension part, 63d, 64 rotating shaft, 65 handle lock spring, 70 drawer handle, 71 shaft part, 71b tip, 72 handle, 100 drawer type breaker.

Claims (3)

Withdrawal frame and
A circuit breaker body that is connected to the drawer frame via a drawer rail and can be pulled out from the drawer frame.
A drawer handle is inserted from the outside, and the circuit breaker body is moved from the inside of the drawer frame in the drawing direction of the circuit breaker body and the insertion direction of the circuit breaker body into the drawer frame as the drawer handle moves. Withdrawal mechanism and
It is provided with an interlock mechanism that regulates the insertion of the drawer handle into the drawer mechanism portion.
The interlock mechanism is
A handle lock pin that prevents the drawer handle from being inserted into the drawer mechanism portion by contact with the drawer handle, and a handle lock pin.
It is provided with an interlock lever that rotates the handle lock pin in conjunction with the operation of the open button to enable the drawer handle to be inserted into the drawer mechanism portion.
The interlock lever
The extension portion of the handle lock pin that extends toward the operation portion that abuts on the interlock lever, and the extension portion.
A drawer-type circuit breaker comprising: a bent portion that bends from the stretched portion in the rotation axis direction of the handle lock pin and abuts on the operating portion. A frame having a groove portion and a flat portion formed on the facing surface facing the interlock lever is provided.
The stretched portion
When the handle lock pin projects toward the facing surface and is changed from a position that does not restrict the insertion of the drawer handle into the extraction mechanism portion to a position that restricts the insertion of the drawer handle, the handle lock pin hits the flat portion from a position in the groove portion. The drawer type circuit breaker according to claim 1, further comprising a convex portion that moves to a contact position. The bent portion is
The drawer type according to claim 1 or 2, wherein the surface in contact with the operation portion is formed so as to be inclined with respect to the direction orthogonal to each of the moving direction of the interlock lever and the rotation axis direction. Circuit breaker.

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