JP7183107B2 - draw-out circuit breaker - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawer-type circuit breaker in which a circuit breaker body is retractably stored in a drawer frame.

2. Description of the Related Art Conventionally, in a drawer-type circuit breaker, a drawer handle is used to pull out a circuit breaker body stored in a drawer frame from the drawer frame. Such a pull-out handle is housed in the circuit breaker main body during a period other than when the pull-out operation is performed in order to prevent loss or the like.

For example, Patent Literature 1 proposes a drawer-type circuit breaker in which a storage space dedicated to a drawer handle is provided in the circuit breaker body, and the drawer handle is stored in the storage space during periods other than when the drawer is operated. In such a draw-out type circuit breaker, a draw-out mechanism is arranged in the circuit breaker main body with an interval from a storage space dedicated to the draw-out handle. By rotating, the circuit breaker main body is pulled out from the drawer frame.

JP 2009-261238 A

However, in the technique described in Patent Document 1, it is necessary to provide a dedicated storage space for storing the drawer handle, so there is a problem that the outer dimensions of the drawer circuit breaker become large.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a draw-out type circuit breaker in which a draw-out handle can be accommodated in a circuit breaker body while suppressing an increase in size.

In order to solve the above-described problems and achieve the object, the drawer-type circuit breaker of the present invention includes a drawer frame, a circuit breaker body, a drawer mechanism, and a drawer handle. The circuit breaker main body is connected to the drawer frame and the drawer rail, and can be pulled out from the drawer frame. The drawer mechanism draws out the circuit breaker main body from within the drawer frame. The drawer handle is housed inside the drawer mechanism. The pull-out mechanism includes a pull-out handle storage portion that stores the pull-out handle inside, a pull-out handle shaft portion that holds the pull-out handle storage portion so that the pull-out handle storage portion can be pulled out from the breaker body, and a base end connected to the pull-out handle shaft portion. A first extending portion having a first screw formed at a tip located in a direction opposite to the draw-out direction of the circuit breaker main body, and a first extending portion fixed to the draw-out frame so that the circuit breaker main body is accommodated in the draw-out frame. an engaging portion having a second thread with which the first thread is engaged.

ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that a drawer handle can be accommodated in a circuit breaker main body, suppressing enlargement.

1 is an external perspective view of a drawer-type circuit breaker according to Embodiment 1 of the present invention; 1 is an external perspective view showing a drawer-type circuit breaker in a state in which a circuit breaker body according to Embodiment 1 is pulled out from inside a drawer frame; 1 is an external perspective view of a drawer-type circuit breaker with a circuit breaker main body drawn out from a drawer frame and a mold cover removed according to Embodiment 1; Sectional view of the circuit breaker main body when the draw-out circuit breaker according to the first embodiment is in a trip state Sectional view of the circuit breaker main body when the draw-out circuit breaker according to the first embodiment is in a fully charged, open state Sectional view of the circuit breaker main body when the draw-out circuit breaker according to the first embodiment is in the closed state FIG. 4 is a diagram showing the relationship between the main shaft, the insulating link arm, and the insulating link according to the first embodiment; Partial cross-sectional view along line VIII-VIII shown in FIG. FIG. 2 is a partial cross-sectional view showing the state of the drawer mechanism and the drawer handle when the drawer circuit breaker according to the first embodiment is in the state shown in FIG. 1; FIG. 4 is a diagram for explaining a method of removing the drawer handle from the drawer mechanism according to the first embodiment; FIG. 4 is a diagram for explaining a method of attaching the drawer handle to the drawer mechanism according to the first embodiment; FIG. 5 is a diagram for explaining a method of pulling out the circuit breaker body from the drawer frame by the pullout handle and the pullout mechanism according to the first embodiment; FIG. 4 is a diagram showing the state of the drawer handle and the drawer mechanism when the circuit breaker body according to the first embodiment is inserted into the drawer frame; FIG. 2 is a side view of the interlock mechanism of the drawer-type circuit breaker according to the first embodiment; FIG. 2 is a diagram showing part of the internal configuration of the drawer-type circuit breaker according to the first embodiment; FIG. 4 is a diagram showing the relationship between the drawer handle housing portion and the interlock lever before the off button according to the first embodiment is pushed; FIG. 5 is a diagram showing the relationship between the drawer handle housing portion and the interlock lever when the off button is pushed in according to the first embodiment; FIG. 5 is a diagram showing the relationship between the drawer handle housing portion and the interlock lever when the push-in of the off button is released according to the first embodiment;

A draw-out type circuit breaker according to an embodiment of the present invention will be described in detail below with reference to the drawings. In addition, this invention is not limited by this embodiment.

Embodiment 1.
FIG. 1 is an external perspective view of a drawer circuit breaker according to Embodiment 1 of the present invention. FIG. 2 is an external perspective view of the draw-out circuit breaker with the circuit breaker main body according to the first embodiment pulled out from the draw-out frame. FIG. 3 is an external perspective view of the drawer-type circuit breaker according to the first embodiment with the circuit breaker main body pulled out from the drawer frame and the mold cover removed. 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 circuit breaker 100 according to the first embodiment includes a circuit breaker body 1 that opens and closes an electric circuit of a three-phase circuit, and a terminal device 2 connected to the circuit breaker body 1. , and a drawer frame 3 in which the terminal device 2 is arranged and the circuit breaker main body 1 is housed. 2 and 3, the draw-out type circuit breaker 100 has an extendable draw-out rail 4 that connects the breaker body 1 and the draw-out frame 3 so that the breaker body 1 can be pulled out from the draw-out frame 3. Prepare. The draw-out type circuit breaker 100 is housed, for example, in a housing of a closed switchboard (not shown) so that the circuit breaker main body 1 can be pulled out.

In the drawings including FIGS. 1 to 3, in order to make the explanation easier to understand, the Z-axis whose positive direction is vertically upward and the X-axis whose positive direction is the direction in which the circuit breaker main body 1 is pulled out from the drawer frame 3 are shown. A three-dimensional Cartesian coordinate system is shown that includes axes and a Y-axis that is orthogonal to the X-axis and the Z-axis, respectively. Hereinafter, 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. Also, the positive direction of the X-axis may be referred to as the forward direction, and the negative direction of the X-axis may be referred to as the backward direction.

As shown in FIGS. 1 and 2, the circuit breaker body 1 includes an insulating housing 10, a drawer mechanism 50 arranged in the lower part of the housing 10, and pulling out the circuit breaker body 1 from the drawer frame 3, and an external and a drawer handle 60 arranged on the drawer mechanism part 50 so as to be detachable. Further, as shown in FIG. 3, the circuit breaker main body 1 is provided with an opening/closing mechanism portion 5 that is accommodated in the housing 10 and that opens and closes the electric circuit.

The housing 10 has a molded case 11 and a molded cover 12 . On the front surface 12a of the mold cover 12, a handle 13 for manually energizing a closing spring 18, which will be described later, an ON button 14 for closing the electric circuit of the three-phase circuit, and opening the electric circuit of the three-phase circuit. An off button 15 for turning on is arranged. In the following, the case where the electric circuit is closed by the circuit breaker body 1 may be simply referred to as the closed state, and the case where the electric circuit is opened by the circuit breaker body 1 may be simply described as the open state. Further, the operation of the circuit breaker main body 1 from the open state to the closed state may be described as a closing operation.

FIG. 4 is a cross-sectional view of the circuit breaker main body when the draw-out circuit breaker according to the first embodiment is in a trip state. FIG. 5 is a cross-sectional view of the circuit breaker main body when the drawer circuit breaker according to the first embodiment is in a fully charged, open state. FIG. 6 is a cross-sectional view of the circuit breaker body when the drawer circuit breaker according to the first embodiment is in the closed state. In the following description, clockwise and counterclockwise directions refer to clockwise and counterclockwise directions in the drawings including FIGS.

As shown in FIG. 4, the circuit breaker body 1 includes a load-side fixed conductor 42, a movable contact 43 having a movable contact 43a, and a power-side fixed conductor 44 having a fixed contact 44a. The circuit breaker body 1 includes a flexible conductor 45 having one end fixed to the housing 10 and the other end fixed to the movable contact 43, and a flexible conductor 45 having one end attached to the housing 10 and the other end includes a contact pressure spring 46 attached to a flexible conductor 45 . The load side fixed conductor 42 and the power supply side fixed conductor 44 are electrically connected via the flexible conductor 45 by the contact between the movable contact 43a and the fixed contact 44a. A movable contact 43 having a movable contact 43 a is driven by the opening/closing mechanism 5 .

The opening/closing mechanism 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 24 a , 26 a , 30 a 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 of arrow D shown in FIG.

One end of the opening/closing mechanism 5 is fixed to a frame 16, and includes a guide plate 17 extending upward, a closing spring 18 attached to the guide plate 17, and a midway portion rotatably supported by a fixed shaft 24a. and an L-shaped charge arm 24 . A spring pin 24 d provided at one end of the charge arm 24 is inserted into an elongated hole 17 a formed in the guide plate 17 . One end of the closing spring 18 abuts on the spring hook pin 24 d and the other end abuts on the frame 16 . An arm-side roller 24b provided at the other end of the charge arm 24 contacts the cam surface 22b of the charge cam 22. As shown in FIG. A cam-side roller 22 a is provided between the charging cam 22 and the ratchet 23 .

The opening/closing mechanism 5 includes a first close latch 25 rotatably supported by a fixed shaft 24a, a second close latch 26 rotatably supported by a fixed shaft 26a, and a semi-cylindrical part. and a closing bar 27 formed on the . The tip of the first close latch 25 contacts the cam-side roller 22a. A latch-side roller 25a provided midway between the base end and the tip end of the first close latch 25 contacts the lower end of the second close latch 26. As shown in FIG. The lower end of the second close latch 26 is formed with a projecting portion 26b and an engaging portion 26c.

Since the second close latch 26 receives a counterclockwise force from a return spring (not shown), the projecting portion 26b tends to rotate the first close latch 25 clockwise. In the state shown in FIG. 4, the first close 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 close latch 25 in a non-rotatable state. The closing bar 27 is rotated clockwise by manual operation using the ON button 14 or ON operation using a solenoid or the like.

FIG. 7 is a diagram showing the relationship between the main shaft, the insulating link arm, and the insulating link according to the first embodiment, and shows only a part of the opening/closing mechanism 5. As shown in FIG. As shown in FIG. 7, the opening/closing mechanism section 5 includes a main shaft 28, an insulating link arm 28a fixed to the main shaft 28, and a second arm fixed to the main shaft 28 and arranged between the insulating link arms 28a. and a 2-link arm 28b. Three base ends of the insulating link arm 28a are arranged along the extension direction of the main shaft 28 at equal intervals. 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. The other end of the insulating link 41 is connected to the movable contact 43 .

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

Next, the energizing operation for shifting the circuit breaker body 1 from the tripped state shown in FIG. 4 to the fully charged open state shown in FIG. 5 will be described. In the trip state shown in FIG. 4 in which the closing spring 18 is released, when the handle 13 is manually pushed down in the direction of arrow D, the ratchet 23, camshaft 21, and 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 hooking pin 24d provided at one end of the charge arm 24 moves downward, and the closing spring 18 is energized.

Further, when the charging cam 22 rotates counterclockwise, the first close latch 25 rotates clockwise, and the latch-side roller 25a is disengaged from the projecting portion 26b of the second close latch 26. As shown in FIG. As a result, the lower end of the second close latch 26 becomes free, so that it rotates counterclockwise by a return spring (not shown), and the engaging portion 26c engages with the latch-side roller 25a of the first close latch 25. to stop counterclockwise rotation. Also, the closing bar 27 is rotated counterclockwise by a return spring (not shown) to enter the state shown in FIG.

Further, since the clockwise rotation of the charge arm 24 causes the operating surface 24c to move downward, the bending force of the closing toggle link mechanism 29 causes the link-side roller 29e of the closing toggle link mechanism 29 to move the operating surface 24c downward. follow. Therefore, the first link 29a of the closing 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. rotate in the direction In the state shown in FIG. 5, the trip bar 32 functions as a stopper that prevents the trip latch 31 from rotating counterclockwise.

It should be noted that the charging cam 22 is rotated almost once by pushing down the handle 13 several times, and finally enters the state shown in FIG. In the state shown in FIG. 5, the release force of the closing spring 18 pushes the spring pin 24d upward, exerting a counterclockwise force on the charge arm 24. A closing bar 27 functions as a stopper via 26 . Therefore, the counterclockwise rotation of the charge arm 24 is prevented.

When the ON button 14 shown in FIGS. 1 and 2 is pushed in the state shown in FIG. 5, the closing bar 27 rotates clockwise and the lock of the second closing latch 26 by the closing bar 27 is released. The unlocked second close latch 26 rotates clockwise, disengaging the engaging portion 26c from the latch-side roller 25a. Therefore, the charging cam 22 rotates counterclockwise while rotating the first close latch 25 counterclockwise by the cam roller 22a, so that the arm roller 24b is pushed by the cam surface 22b of the charging cam 22. Fall down the steps.

The charge arm 24 rotates counterclockwise by the releasing force of the closing spring 18 , and the operating surface 24 c flips up the link side roller 29 e of the closing toggle link mechanism 29 . Since the trip latch 31 is locked against counterclockwise movement by the trip bar 32, the closing toggle link mechanism 29 extends and rotates the second link arm 28b counterclockwise. As a result, as shown in FIG. 6, the movable contact 43a and the fixed contact 44a are brought into contact with each other in the circuit breaker body 1, and the electric circuit is closed. 6, the contact pressure spring 46 applies a clockwise rotational force to the link lever 30 through the closing toggle link mechanism 29 and the pin 30b. Counterclockwise rotation is blocked.

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

As shown in FIG. 8 , the drawer mechanism 50 includes an expandable mechanism 51 that can be drawn out from the circuit breaker main body 1 , an extending part 52 whose base end is connected to the expandable mechanism 51 , and a drawer frame 3 . and an engagement recess 53 into which the tip of the extending portion 52 is inserted. A male thread is formed at the tip of the extending portion 52 , and a female thread is formed inside the engaging recess 53 . The engaging recess 53 is also called an insert screw because the distal end of the extending portion 52 having a male thread is inserted therein. In the state shown in FIG. 8, the male thread formed at the tip of the extending portion 52 is engaged with the female thread formed inside the engaging recess 53, and the extending portion 52 and the engaging recess 53 are engaged with each other. Since the circuit breaker main body 1 is in a state where the draw-out frame 3 cannot be pulled out.

The expansion/contraction mechanism 51 includes a pull-out handle housing portion 54 for housing the pull-out handle 60 so that it can be taken out to the outside, and the pull-out handle housing portion 54 can be pulled out from the circuit breaker body 1 along the longitudinal direction, which is the extending direction of the pull-out handle. and a drawer handle shank 55 for holding.

Both the drawer handle housing portion 54 and the drawer handle shaft portion 55 are formed in a cylindrical shape, and the outer diameter of the drawer handle shaft portion 55 is smaller than the inner diameter of the drawer handle housing portion 54 . In the state shown in FIG. 8, the drawer handle shaft portion 55 is accommodated inside the drawer handle accommodating portion 54 in which the drawer handle 60 is accommodated. The extension mechanism 51 is held by the housing 10 by the holding member 80 so that the drawer handle storage section 54 that houses the drawer handle 60 can be pulled out of the housing 10 and rotatably. Note that the extension mechanism 51 may have a configuration in which the inner diameter of the drawer handle shaft portion 55 is larger than the outer diameter of the drawer handle housing portion 54 .

9 is a partial cross-sectional view showing the state of the drawer mechanism and the drawer handle when the drawer circuit breaker according to the first embodiment is in the state shown in FIG. 1. FIG. FIG. 10 is a diagram for explaining a method of extracting the drawer handle from the drawer mechanism according to the first embodiment; FIG. 11 is a diagram for explaining a method of attaching the drawer handle to the drawer mechanism according to the first embodiment; FIG. 12 is a diagram for explaining a method of pulling out the circuit breaker body from the drawer frame by the pullout handle and the pullout mechanism according to the first embodiment. 13A and 13B are views showing states of the drawer handle and the drawer mechanism when the circuit breaker body according to the first embodiment is inserted into the drawer frame. FIG. 9 to 13 show a cross-sectional view of part of the structure of the telescopic mechanism 51 for easy understanding.

When the drawer-type circuit breaker 100 is in the state shown in FIG. 1, the drawer mechanism portion 50 and the drawer handle 60 are in the state shown in FIG. It is When the circuit breaker main body 1 is pulled out from the drawer frame 3 from the state shown in FIG.

A hexagonal protrusion 54a is formed on the inner peripheral surface of the base end of the drawer handle housing portion 54, and a hexagonal protrusion 55a is formed on the outer peripheral surface of the tip of the drawer handle shaft portion 55. there is In the state shown in FIG. 10, the projecting portion 54a of the drawer handle housing portion 54 is engaged with the projecting portion 55a of the drawer handle shaft portion 55, and further forward drawing of the drawer handle housing portion 54 is prevented. This prevents the drawer handle housing portion 54 from falling off from the drawer handle shaft portion 55 .

Next, as shown in FIG. 11, after the drawer handle 60 is removed from the opening 54b in front of the leading end of the drawer handle housing portion 54, the drawer handle 60 is inserted into a pair of insertion openings 54c formed at the tip of the drawer handle housing portion 54. insert The drawer handle 60 includes an extending portion 60a extending in one direction from the proximal end to the distal end, and a head portion 60b continuous with the proximal end of the extending portion 60a.

The extending portion 60a has an outer diameter smaller than the inner diameter of the pair of insertion openings 54c provided in the drawer handle housing portion 54, and is inserted through the pair of insertion openings 54c. The pair of insertion openings 54c are provided at positions facing each other in a direction orthogonal to the direction in which the circuit breaker body 1 is pulled out from the drawer frame 3. As shown in FIG. Further, since the head portion 60b has an outer diameter larger than the outer diameter of the pair of insertion openings 54c, the extension portion 60a is locked by the drawer handle housing portion 54 while being inserted into the pair of insertion openings 54c. As a result, the drawer handle 60 is attached to the drawer handle housing portion 54 .

By rotating the drawer handle 60 in the first direction about the drawer handle shaft portion 55 from the state shown in FIG. 11, the distal end of the extension portion 52, which is a male screw, is pulled out from the engaging recess 53, which has a female screw inside. As a result, as shown in FIG. 12, the engagement between the circuit breaker body 1 and the drawer frame 3 by the drawer mechanism 50 is released, and the drawn state shown in FIG. be able to. The first direction is one of the clockwise direction and the counterclockwise direction, and is determined by the configuration of the male and female threads described above.

When the draw-out circuit breaker 100 is changed from the state shown in FIG. 2 to the state shown in FIG. 1, the breaker main body 1 is pushed rearward to bring the draw-out mechanism 50 into the state shown in FIG. That is, the tip of the extending portion 52 is brought into contact with the engaging recess 53 . In this state, when the drawer handle 60 is rotated about the drawer handle shaft portion 55 in the second direction opposite to the first direction described above, the tip of the extending portion 52 rotates inside the engaging recess 53 . 11, and the circuit breaker main body 1 is inserted into the drawer frame 3. As shown in FIG.

Further, the draw-out type circuit breaker 100 according to the first embodiment includes an interlock that allows the circuit breaker body 1 to be pulled out from the drawer frame 3 only when the circuit breaker body 1 is in the open state. 14 is a side view of the interlock mechanism of the drawer-type circuit breaker according to the first embodiment, and FIG. 15 is a diagram showing a part of the configuration inside the housing of the drawer-type circuit breaker according to the first embodiment. be.

As shown in FIG. 14, the interlock mechanism 70 is attached to the frame 16 and has an interlock lever 71 that locks the drawer handle housing 54 . As shown in FIG. 15 , the interlock mechanism 70 is linked to the off button 15 , and the interlock mechanism 70 is driven by pushing the off button 15 .

FIG. 16 is a diagram showing the relationship between the drawer handle housing portion and the interlock lever before the off button is pushed according to the first embodiment; FIG. 17 is a diagram showing the relationship between the drawer handle housing portion and the interlock lever when the off button is pushed in according to the first embodiment; FIG. 18 is a diagram illustrating the relationship between the drawer handle housing portion and the interlock lever when the off button is released from being pushed according to the first embodiment;

When the circuit breaker main body 1 is in the closed state, the interlock lever 71 abuts on the pull-out handle housing portion 54 and prohibits movement of the pull-out handle housing portion 54, as shown in FIG. For example, as shown in FIG. 10, a recessed portion 54d is formed in the drawer handle housing portion 54. By inserting the projecting portion 71a of the interlock lever 71 into the recessed portion 54d, the drawer handle housing portion 54 is interlocked. It is locked by the lock lever 71 . As a result, movement of the drawer handle housing portion 54 is prohibited. The locking of the drawer handle housing portion 54 by the interlock lever 71 is not limited to providing the recess 54d in the drawer handle housing portion 54 . For example, a protrusion may be provided in the drawer handle housing portion 54, and the protrusion 71a of the interlock lever 71 may be brought into contact with the protrusion.

In the state shown in FIG. 16, when the OFF button 15 of the circuit breaker main body 1 is pushed backward, the interlock lever 71 is pulled up as shown in FIG. comes off. In this state, the drawer handle housing portion 54 can be drawn out to the state shown in FIG. In this manner, the interlock mechanism 70 engages with the pull-out handle storage portion 54 to prohibit the pull-out handle storage portion 54 from being pulled out when the circuit breaker main body 1 is in the closed state. Thereby, it is possible to prevent the circuit breaker main body 1 in the closed state from being pulled out from the drawer frame 3 .

After that, when the off button 15 is released from being pushed, the interlock lever 71 is lowered, and as shown in FIG. The handle housing portion 54 is engaged with the interlock lever 71 . The interlock mechanism section 70 may be configured to maintain the interlock lever 71 in the state shown in FIG. 18 when the depression of the off button 15 is released.

The pulled-out state of the circuit breaker body 1 includes a connection position, a test position, a disconnecting position, and a pulled-out position. The connection position is the position of the circuit breaker main body 1 in the state of being accommodated in the drawer frame 3, which is the position shown in FIG. The drawn position is a position where the circuit breaker body 1 is drawn out from the drawer frame 3, and is the position shown in FIG. The testing position and the disconnecting position are positions between the withdrawn position and the connecting position, the testing position being closer to the connecting position than the disconnecting position. When the circuit breaker main body 1 is in the test position, a control circuit (not shown) is connected, and the circuit breaker main body 1 can be electrically turned on and off. Further, when the circuit breaker main body 1 is in the disconnected position, the control circuit (not shown) is not connected.

The interlock mechanism section 70 prohibits the closing operation of the circuit breaker body 1 when the circuit breaker body 1 is started to be pulled out from the drawer frame 3 by the drawer mechanism section 50 and the drawer handle 60 . For example, the interlock mechanism 70 is provided with a lock lever (not shown) that prevents the ON button 14 from being pushed when the circuit breaker body 1 is started to be pulled out from the drawer frame 3 . By locking the ON button 14 according to the position of the circuit breaker body 1 with this lock lever, the closing operation of the circuit breaker body 1 is prohibited when the circuit breaker body 1 starts to be pulled out from the drawer frame 3. be.

Further, the interlock mechanism portion 70 is in a state where the circuit breaker body 1 is pulled out to the test position or the disconnecting position, and the draw-out mechanism portion 50 with the draw-out handle 60 housed inside is housed in the circuit breaker body 1. , the prohibition of the closing operation of the circuit breaker body 1 can be released. For example, the locking lever (not shown) described above is released from the ON button 14 when the drawer mechanism 50 with the drawer handle 60 housed therein is housed in the circuit breaker main body 1 . Thereby, the closing operation of the circuit breaker body 1 can be performed when the circuit breaker body 1 is at the test position or the disconnecting position. A test position and a disconnect position are examples of specific positions.

The interlock mechanism section 70 has a drive mechanism that drives the lock lever described above based on, for example, the position of the circuit breaker main body 1 and the states of the drawer handle 60 and the drawer mechanism section 50. The prohibition of the closing operation of the device main body 1 is released. The drive mechanism can determine the position of the circuit breaker body 1 from the extension/contraction state of the drawer rail 4 . Further, the drive mechanism has a contact piece interlocking with the lock lever inside the drawer handle shaft portion 55 of the drawer mechanism portion 50, and the drawer mechanism portion 50 with the drawer handle 60 housed inside the circuit breaker main body. 1, the contact piece is pushed by the drawer handle 60. As shown in FIG. When the contact piece is pushed by the drawer handle 60, the lock lever moves to the position where the locking of the ON button 14 is released. Note that the drive mechanism for driving the lock lever is not limited to the example described above, and may be configured to include, for example, cams, links, gears, and the like.

Further, the interlock mechanism section 70 can release the prohibition of the closing operation of the circuit breaker body 1 when the state shown in FIG. 1 is reached. That is, when the circuit breaker body 1 is housed in the drawer frame 3 and the drawer mechanism part 50 with the drawer handle 60 housed inside is housed in the circuit breaker body 1, the interlock mechanism part 70 is closed. 1 can be released. For example, the locking lever (not shown) described above is released from the ON button 14 when the drawer mechanism 50 with the drawer handle 60 housed therein is housed in the circuit breaker main body 1 .

As described above, the drawer circuit breaker 100 according to the first embodiment has the drawer frame 3 , the circuit breaker main body 1 , the drawer mechanism section 50 and the drawer handle 60 . The circuit breaker main body 1 is connected to the drawer frame 3 via the drawer rails 4 and can be pulled out from within the drawer frame 3 . The drawer mechanism 50 draws out the circuit breaker body 1 from the drawer frame 3 . The drawer handle 60 is housed inside the drawer mechanism portion 50 . As a result, the drawer handle 60 can be accommodated in the circuit breaker main body 1 while suppressing an increase in the size of the drawer circuit breaker 100 .

The drawer mechanism part 50 also includes an extension mechanism part 51 having a drawer handle storage part 54 and a drawer handle shaft part 55 , an extending part 52 and an engaging recessed part 53 . The drawer handle housing portion 54 houses therein the drawer handle 60 . The drawer handle shaft portion 55 holds the drawer handle housing portion 54 so that it can be pulled out from the circuit breaker body 1 . The extending portion 52 has a base end connected to the pull-out handle shaft portion 55 , and a male screw is formed at a tip located in a direction opposite to the pull-out direction of the circuit breaker body 1 . The engaging recess 53 is fixed to the drawer frame 3 and has a female thread into which the male thread of the extending portion 52 is inserted when the circuit breaker body 1 is housed in the drawer frame 3 . As a result, the drawer mechanism section 50 can be configured with a relatively simple structure.

The draw-out type circuit breaker 100 also has an interlock mechanism 70 that engages with the draw-out handle housing portion 54 to prohibit the draw-out of the draw-out handle housing portion 54 when the circuit breaker body 1 is in the closed state. As a result, it is possible to prevent the circuit breaker body 1 from being pulled out from the drawer frame 3 when the circuit breaker body 1 is in the closed state.

Further, the interlock mechanism section 70 prohibits the closing operation of the circuit breaker body 1 when the drawing of the circuit breaker body 1 from the drawer frame 3 is started. As a result, when the circuit breaker body 1 is pulled out from the drawer frame 3, it is possible to prevent the circuit breaker body 1 from changing from the open state to the closed state.

Further, the interlock mechanism part 70 is configured such that the drawer mechanism part 50 with the drawer handle housing part 54 accommodated therein is attached to the breaker body 1 in a state where the circuit breaker body 1 is drawn out from the drawer frame 3 to a specific position. When retracted, the prohibition of the closing operation of the circuit breaker body 1 is released. As a result, for example, the circuit breaker body 1 can be changed from the open state to the closed state while the circuit breaker body 1 is pulled out to the test position.

Further, when the breaker body 1 is housed in the drawer frame 3 and the drawer mechanism part 50 with the pull-out handle 60 housed inside is housed in the circuit breaker body 1, the interlock mechanism part 70 is closed. The prohibition of the closing operation of the device main body 1 is released. As a result, loss of the drawer handle 60 can be prevented with high accuracy.

The configuration shown in the above embodiment shows an example of the content of the present invention, and it is possible to combine it with another known technology, and one configuration can be used without departing from the scope of the present invention. It is also possible to omit or change the part.

Reference Signs List 1 circuit breaker body 2 terminal device 3 drawer frame 4 drawer rail 5 opening/closing mechanism 10 housing 11 molded case 12 molded cover 12a front surface 13 handle 14 on button 15 off button 16 frame , 17 guide plate, 17a long hole, 18 closing spring, 21 camshaft, 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 actuation surface, 24d spring pin, 25 first close latch, 25a latch-side roller, 26 second close latch, 26b, 54a, 55a, 71a protrusion, 26c engagement portion, 27 close bar, 28 main Shaft 28a Insulating link arm 28b Second link arm 29 Closing toggle link mechanism 29a First link 29b Second 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 Flexible conductor 46 Contact pressure spring , 50 drawer mechanism portion, 51 telescopic mechanism portion, 52, 60a extension portion, 53 engagement recess, 54 drawer handle storage portion, 54b opening, 54c insertion port, 54d recess, 55 drawer handle shaft portion, 60 drawer handle, 60b head Part 70 Interlock Mechanism Part 71 Interlock Lever 80 Holding Member 100 Draw-out Circuit Breaker.

Claims (6)

a drawer frame;
a circuit breaker main body connected to the drawer frame via a drawer rail and capable of being pulled out from within the drawer frame;
a drawer mechanism for drawing out the circuit breaker body from within the drawer frame;
a drawer handle housed inside the drawer mechanism;
with
The withdrawal mechanism unit
a drawer handle storage part for storing the drawer handle inside;
a pull-out handle shaft portion that holds the pull-out handle storage portion so that it can be pulled out from the circuit breaker body;
a first extending portion having a base end connected to the pull-out handle shaft portion and having a first screw formed at a tip located in a direction opposite to the pull-out direction of the circuit breaker body;
an engaging portion fixed to the drawer frame and having a second screw with which the first screw of the first extending portion is engaged when the circuit breaker body is accommodated in the drawer frame.
A draw-out type circuit breaker characterized by: The drawer handle has a rod-shaped second extension and a head,
the second extending portion of the drawer handle is accommodated in the drawer handle accommodating portion which is a cylindrical body;
A pair of insertion openings for inserting the second extended portion of the pull-out handle taken out from the pull-out handle storage portion in a direction orthogonal to the pull-out direction of the circuit breaker main body is provided at the tip of the pull-out handle storage portion. have
The draw-out type circuit breaker according to claim 1, characterized in that: 3. The circuit breaker according to claim 1 or 2, further comprising an interlock mechanism that engages with the pull-out handle storage portion to prohibit the withdrawal of the pull-out handle storage portion when the circuit breaker body is in the closed state. Draw-out circuit breaker. The interlock mechanism section is
The drawer-type circuit breaker according to claim 3, wherein when the circuit breaker body starts to be pulled out from the drawer frame, the closing operation of the circuit breaker body is prohibited. The interlock mechanism section is
When the circuit breaker body is pulled out from the drawer frame to a specific position and the drawer mechanism with the drawer handle housed inside is housed in the circuit breaker body, the circuit breaker body is closed. 5. The draw-out type circuit breaker according to claim 3 or 4, wherein prohibition of operation is released. The interlock mechanism section is
In a state in which the circuit breaker body is housed in the drawer frame, when the drawer mechanism with the pull-out handle housed inside is housed in the circuit breaker body, the closing operation of the circuit breaker body is prohibited. The draw-out type circuit breaker according to any one of claims 3 to 5, wherein the breaker is released.

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