TWI620385B - Circuit breaker - Google Patents

Abstract

The object of the present invention is to improve the operability of a circuit breaker.

The circuit breaker of the present invention includes a circuit breaker main circuit, a circuit breaker main circuit transfer unit, a fixed-side locking member, a front-side unit, and a switchboard. When the lock release member is installed on the front unit or the fixed side lock member, when the circuit breaker main circuit transfer unit is placed in the first position, the mobile side lock member is in the initial position. When the circuit breaker main circuit transfer unit is moved from the first position toward When the back side moves, the moving side lock member moves to the pull-in position in cooperation with the lock release member. When the circuit breaker main circuit transfer unit reaches the second position closer to the back side than the first position, the moving side lock member will pull in The position returns to the initial position, and engages with the engaging hole provided in the locking member on the fixed side.

Description

breaker

The present invention relates to a circuit breaker, and more particularly to a circuit breaker provided with an interlocking mechanism for inserting in a panel in order to prevent an unexpected pull-out operation of a main circuit of the circuit breaker out of the panel.

In the circuit breaker, the circuit breaker body (main circuit of the circuit breaker) is installed inside a switchboard provided with a door panel (for example, Patent Documents 1 to 3). The circuit breaker provided with an interlocking mechanism inserted in the panel is provided with an external operating mechanism in order to operate the position of the circuit breaker body from outside the panel. In this circuit breaker, an interlocking mechanism for inserting into the panel is provided in order to prevent an unexpected pull-out operation of the circuit breaker body toward the outside of the panel.

The circuit breaker provided with an interlocking mechanism inside the panel is provided with an external operating mechanism in order to operate the position of the circuit breaker main body from outside the panel in a state where the door panel of the switchboard is closed. When the circuit breaker body is moved out of the panel or inserted into the panel, the door of the switchboard is opened and the circuit breaker body is manually moved directly. The circuit breaker provided with the interlocking mechanism of the panel is provided with the following interlocking mechanism for the pull-out operation or the inserting operation.

That is, when the circuit breaker body is pulled out from the inside of the switchboard, in order to prevent the unexpected operation The dynamic lock mechanism (moving-side locking member and fixed-side locking member) operates. The mobile locking mechanism is in contact with the frame of the switchboard to prevent unintended pull-out operation of the circuit breaker body. By releasing the movement locking mechanism by the operator, the operation of pulling the circuit breaker body out of the disk can be performed. At this time, the insertion operation of the circuit breaker body into the disk is performed by manually releasing the movement lock mechanism.

(Prior technical literature) (Patent Literature)

Patent Document 1: Japanese Patent Application Laid-Open No. 2011-10544

Patent Document 2: Japanese Patent Application Laid-Open No. 63-81607

Patent Document 3: Japanese Patent Application Publication No. 2012-253895

As explained above, the machine that can be pulled out from the switchboard includes the circuit breaker body. The machine may unexpectedly fall or fall off from the switchboard due to the pull-out operation caused by misoperation. In order to prevent the machine from falling and falling off from the switchboard, a mobile lock mechanism is installed on the circuit breaker. The operator can perform a pull operation toward the outside of the switchboard and an insertion operation toward the inside of the switchboard by releasing the movement lock mechanism. The circuit breaker body with an external operating mechanism also has a movement locking mechanism. The mobile locking mechanism is engaged with the frame of the power distribution board to prevent the unexpected body of the circuit breaker from being pulled out.

In order to seek a circuit breaker with no external operating mechanism The structure is shared, and a circuit breaker with an external operating mechanism is a structure in which a structural unit of the external operating mechanism is installed below the circuit breaker body. Therefore, in order to provide the release mechanism of the movement lock mechanism near the center of gravity position of the circuit breaker body, it must be constituted by a plurality of links. The release mechanism of the movement lock mechanism is a structural unit mounted on an external operation mechanism.

A circuit breaker having an external operating mechanism is provided with an in-panel insertion / expansion pull-out unit (a circuit breaker main circuit transfer unit), a circuit breaker compartment (compartment), and a circuit breaker body. The in-panel insert / out-of-panel pull-out unit is used when a circuit breaker body having an external operating mechanism is inserted into the pan. The circuit breaker system will be inserted into the panel with an external operator. In the in-panel insert / out-of-panel pull-out unit of a circuit breaker with an external operating mechanism, the mobile lock mechanism will also contact the engaging portion of the frame of the circuit breaker chamber when it is inserted into the disc of the circuit breaker body. The operator must pull the operation handle of the in-disk insert / out-disk pull-out unit toward the center during the insert operation to release the movement lock mechanism.

After the operator performs the release operation of the moving lock mechanism, the operator holds the part of the circuit breaker body separated from the center of gravity position in the height direction, and inserts the circuit breaker body into the inside of the switchboard. Therefore, it is necessary to have a larger operating force than the position of the center of gravity of the circuit breaker body to perform the insertion operation in the panel. Next, the operator inserts the circuit breaker body into the switchboard while performing a release operation. Since the operator must perform both the release operation and the insertion operation at this time, workability is reduced.

The present invention was developed by an inventor to solve the above-mentioned problem of a circuit breaker having the above-mentioned interlocking mechanism for inserting in a panel. Therefore, the purpose of the present invention The reason is that when the drawn circuit breaker body is inserted into the switchboard, the movement lock mechanism is temporarily and automatically released. An object of the present invention is to provide a circuit breaker provided with an interlocking mechanism for inserting in a panel, which is capable of easily inserting a circuit breaker body by the above-mentioned method.

The circuit breaker of the present invention includes: a circuit breaker main circuit that performs a switching operation; a circuit breaker main circuit transfer unit that transports the circuit breaker main circuit; a fixed-side locking member provided with an engaging hole; and a mobile-side lock having a restoring force The front side unit of the component; the switchboard that accommodates the main circuit of the circuit breaker mounted on the main circuit transfer unit of the circuit breaker; a lock release member is installed on the front side unit or the fixed side locking member, and the main circuit transfer unit of the circuit breaker is placed on the first At the 1 position, the moving-side locking member is located at the initial position. When the circuit breaker main circuit transfer unit moves from the first position to the inner side, the moving-side locking member will move to the pull-in position in conjunction with the lock release member. When the circuit transfer unit reaches the second position closer to the back than the first position, the moving-side locking member returns to the initial position from the pulled-in position, and engages with the engaging hole opened in the fixed-side locking member.

The circuit breaker of the present invention includes: a circuit breaker main circuit that performs a switching operation; a circuit breaker main circuit transfer unit that transports the circuit breaker main circuit; a fixed-side locking member provided with an engaging hole; and a mobile-side lock having a restoring force The front unit of the component; the switchboard that accommodates the main circuit of the circuit breaker mounted on the main circuit transfer unit of the circuit breaker; a lock release member and a main circuit of the circuit breaker are installed on the front unit or the fixed side locking member When the transfer unit is placed in the first position, the mobile-side lock member is in the initial position. When the circuit breaker main circuit transfer unit is moved from the first position to the inner side, the mobile-side lock member will be pulled in in conjunction with the lock release member. The position is moved. When the main circuit transfer unit of the circuit breaker reaches the second position closer to the back than the first position, the moving-side locking member returns to the initial position from the pull-in position, and engages with the locking hole opened on the fixed-side locking member. By this, when the second position is reached, the moving-side locking member returns to the initial position from the pulled-in position.

The inter-disc insertion mechanism of the front unit is a structure that automatically releases the movement locking mechanism when the in-disc is inserted, and after the movement locking mechanism is automatically released, the structure for quickly returning the lock pulled out of the disc is restored. In the state that the door of the switchboard is closed, the mobile lock mechanism is automatically released temporarily when the main circuit of the circuit breaker is inserted into the panel, so that the operating force in the panel of the main circuit of the circuit breaker can be reduced, and when it is inserted in the panel Improved workability.

20‧‧‧ Circuit Breaker Main Circuit Transfer Unit

21‧‧‧casters

22‧‧‧Unit operation handle

23‧‧‧Moving side lock member

24‧‧‧ cone member

24a‧‧‧Rivets

24b‧‧‧ major side

25‧‧‧Fixed side locking member

25a‧‧‧1st engaging hole

25b‧‧‧ 2nd engaging hole

25c‧‧‧Snap hole

25d‧‧‧ inside top

25e‧‧‧Snap hole

25f‧‧‧Fixed side cone member

26‧‧‧Front side unit

26A‧‧‧Front unit body

27‧‧‧Restoration spring

28‧‧‧Unit joystick

30‧‧‧ Circuit Breaker Unit

30A‧‧‧ compartment

31‧‧‧Circuit breaker main circuit

32‧‧‧Circuit breaker handle

34‧‧‧Insulation sleeve

35‧‧‧back

36‧‧‧Side

37‧‧‧ Sliding base

40‧‧‧Inner plate interlocking mechanism

70‧‧‧Operator

90‧‧‧ switchboard

91‧‧‧ switchboard body

92‧‧‧ Switchboard door 扉

92a‧‧‧Door opening

100‧‧‧ Circuit Breaker

103‧‧‧horizontal bus

104‧‧‧cable

105‧‧‧Connection Department

106‧‧‧Converter

FIG. 1 is a side cross-sectional view showing the internal structure of a circuit breaker having an in-panel interlocking mechanism according to an embodiment of the present invention.

Fig. 2 is a side sectional view showing a schematic configuration of a circuit breaker unit according to an embodiment of the present invention.

FIG. 3 is a diagram for explaining a structure of a circuit breaker having an interlocking mechanism inserted in a panel according to an embodiment of the present invention, and is an overall circuit diagram showing a case where a main circuit of the circuit breaker is located at a test position.

FIG. 4 is a diagram for explaining a structure of a circuit breaker having an interlocking mechanism inserted in a panel according to an embodiment of the present invention, and is an overall circuit diagram showing a situation where a main circuit of the circuit breaker is located at a connection position.

Fig. 5 is a diagram for explaining the structure of the main circuit transfer unit of the circuit breaker according to the first embodiment of the present invention, and is a perspective view showing a state where the main circuit of the circuit breaker is located at a pulled-out position.

Fig. 6 is a diagram for explaining the structure of the circuit breaker main circuit transfer unit according to the first embodiment of the present invention, and is a perspective view of the circuit breaker main circuit transfer unit viewed obliquely from the front.

FIG. 7 is a diagram for explaining the structure of the main circuit transfer unit of the circuit breaker according to Embodiment 1 of the present invention, and is a partially enlarged view of the front unit.

Fig. 8 is a top view (top view) showing the circuit breaker main circuit transfer unit according to the first embodiment of the present invention.

Fig. 9 is a front view showing the main circuit transfer unit of the circuit breaker according to the first embodiment of the present invention.

Fig. 10 is a right side view showing the main circuit transfer unit of the circuit breaker according to the first embodiment of the present invention.

FIG. 11 is an enlarged front view showing a unit operation handle of the main circuit transfer unit of the circuit breaker according to Embodiment 1 of the present invention, and shows that the front unit is located at an initial position.

FIG. 12 is an enlarged front view showing a unit operation handle of the main circuit transfer unit of the circuit breaker according to the first embodiment of the present invention, and shows that the front unit is located at the pulled-in position.

FIG. 13 is a diagram for explaining the structure of the front side unit according to the first embodiment of the present invention. The drawing is an enlarged top view (top view) of the cone member.

Fig. 14 is a diagram for explaining the structure of the front side unit according to the first embodiment of the present invention, and is a right side view showing the structure of the operation handle and the cone member of the unit.

Fig. 15 is a diagram for explaining the structure of the circuit breaker main circuit transfer unit according to the first embodiment of the present invention, and is an enlarged side view showing a state where the circuit breaker main circuit is located at a pulled-out position.

FIG. 16 is a diagram for explaining the structure of the circuit breaker main circuit transfer unit according to the first embodiment of the present invention, and is a perspective external view showing a state where the circuit breaker main circuit is located at a test position.

Fig. 17 is a diagram for explaining the structure of the circuit breaker main circuit transfer unit according to the first embodiment of the present invention, and is an enlarged side view showing a state where the circuit breaker main circuit is located at a test position.

FIG. 18 is a diagram for explaining the structure of the circuit breaker main circuit transfer unit according to the first embodiment of the present invention, and is a perspective external view showing a state where the circuit breaker main circuit is located at a connection position.

FIG. 19 is a diagram for explaining a structure of a circuit breaker main circuit transfer unit according to Embodiment 2 of the present invention, and is a perspective external view showing a state where the circuit breaker main circuit is located at a pulled-out position.

Fig. 20 is a diagram for explaining the structure of a circuit breaker main circuit transfer unit according to the second embodiment of the present invention, and is an enlarged perspective view showing a state where the circuit breaker main circuit is located at a pulled-out position.

FIG. 21 is a diagram for explaining the structure of a main circuit transfer unit of a circuit breaker according to Embodiment 2 of the present invention, and shows that the main circuit of the circuit breaker is in a pulled-out position. An enlarged side view of the situation.

Fig. 22 is a diagram for explaining the structure of a circuit breaker main circuit transfer unit according to a second embodiment of the present invention, and is a perspective external view showing a state where the circuit breaker main circuit is located at a test position.

Fig. 23 is a diagram for explaining the structure of a circuit breaker main circuit transfer unit according to a second embodiment of the present invention, and is an enlarged side view showing a situation where the circuit breaker main circuit is located at a test position.

Fig. 24 is a diagram for explaining the structure of a circuit breaker main circuit transfer unit according to a third embodiment of the present invention, and is a perspective external view showing a state where the circuit breaker main circuit is located at a pulled-out position.

Fig. 25 is a diagram for explaining the structure of a circuit breaker main circuit transfer unit according to a third embodiment of the present invention, and is an enlarged perspective view showing a state where the circuit breaker main circuit is located at a pulled-out position.

A circuit breaker provided with an interlocking mechanism in a panel according to an embodiment of the present invention will be described below with reference to the drawings. In addition, in the drawings, the same components are denoted by the same reference numerals, and the sizes or scales of the corresponding components are independent of each other. For example, when the same component is not changed between the sectional views of one of the components, the size or scale of the same component may be different. In addition, a circuit breaker provided with an interlocking mechanism in the panel actually includes a plurality of components, but for the sake of simplicity, only the parts necessary for the description are described, and other parts are omitted.

Embodiment 1

Hereinafter, a circuit breaker provided with an in-panel interlocking mechanism according to an embodiment of the present invention will be described with reference to the drawings. The circuit breaker main circuit transfer unit (insertion in / out of the panel) of the circuit breaker is an external operation mechanism having a position where the main body of the circuit breaker can be operated in a state where the door panel of the switchboard is closed. FIG. 1 is a side cross-sectional view showing a configuration of a circuit breaker having a disc interlocking mechanism to which the present invention is applied. The circuit breakers 100 according to the embodiment of the present invention are generally arranged in a horizontal direction. The circuit breaker 100 is composed of a circuit breaker unit 30, a switchboard 90, a horizontal bus 103, a cable 104, an inverter 106, and the like, and includes an interlocking mechanism for inserting in the panel.

The circuit breaker unit 30 is housed inside the switchboard 90. The switchboard 90 is composed of a switchboard body 91 and a switchboard door cymbal 92. The switchboard door cymbal 92 of the switchboard 90 is provided on the front side of the switchboard body 91 in an openable and closable manner. In the switchboard lintel 92, the lintel opening 92a is provided at two locations. A horizontal bus bar 103 is arranged in a horizontal direction approximately at the center of the inside of the switchboard main body 91 and penetrates between the plurality of switchboard main bodies 91. Here, the horizontal direction in the drawing refers to the thickness direction of the paper surface. Inside the switchboard body 91, a circuit breaker unit 30 and the like are installed.

Behind the horizontal bus bar 103, two cables 104 are arranged so as to stand upward from the floor of the switchboard body 91. In addition, two circuit breaker units 30 fixed to the switchboard body 91 are arranged in the up-down direction before the horizontal bus bar 103. One circuit breaker main circuit 31 is arranged inside each circuit breaker unit 30. The connecting portion 105 is protected by an insulation sleeve and is installed on the rear wall of the circuit breaker unit 30. The connecting part 105 is divided into upper and lower parts A total of six are installed in two circuit breaker units 30 in two stages. The circuit breaker main circuit transfer unit 20 and the front unit 26 function as a structural unit of an external operation mechanism. One end of the connecting portion 105 is connected to the cable 104 through the horizontal bus 103 or the inverter 106.

The circuit breaker unit 30 is an external operation mechanism having a position where the circuit breaker body can be operated. The other end of the connecting portion 105 is separated from the terminal of the circuit breaker main circuit 31 by the circuit breaker main circuit 31 moving in the front-rear direction. The circuit breaker unit 30 is composed of a circuit breaker main circuit 31, a circuit breaker main circuit transfer unit 20 (in-disk insertion / out-disk extraction unit), and the like. The circuit breaker main circuit 31 is mounted on the circuit breaker main circuit transfer unit 20, and moves inside the circuit breaker unit 30 appropriately toward the front and rear directions of the switchboard body 91. In the figure, the circuit breaker main circuit 31 is placed in a test position. The front side unit 26 is installed in front of the circuit breaker main circuit transfer unit 20.

Fig. 2 is a schematic cross-sectional view showing a main configuration of a circuit breaker unit 30 for implementing an embodiment of the present invention. Each circuit breaker main circuit 31 is mounted on the circuit breaker main circuit transfer unit 20. The circuit breaker unit 30 is fixed to the switchboard 90. Each circuit breaker main circuit transfer unit 20 is provided with casters 21 and the like. A circuit breaker handle 32 is mounted on the front of the circuit breaker main circuit 31. A unit operation lever 28, a unit operation handle 22, and the like are mounted on the front unit 26.

In order to operate the unit operating lever 28 of the front unit 26, it is necessary to pass the front end of the operating rod through the door opening 92a. When the unit operating lever 28 is operated from outside the switchboard 90 using this operating stick, the circuit breaker main circuit 31 mounted on the circuit breaker main circuit transfer unit 20 faces horizontally. To move. In order to install the circuit breaker main circuit 31 on the switchboard 90, firstly, the circuit breaker main circuit 31 mounted on the circuit breaker main circuit transfer unit 20 outside the panel is installed in the circuit breaker unit 30 with the switchboard door 92 open. Compartment 30A. At this time, the circuit breaker main circuit 31 is placed in the pulled-out position A (first position). In addition, the circuit breaker main circuit transfer unit 20 is placed in the pull-out position D (first position). The pulled-out position means a state in which a part of the front face of the circuit breaker main circuit 31 is pulled out of the panel.

Next, the circuit breaker handle 32 or the unit operation handle 22 is manually pushed to move the circuit breaker main circuit 31 and the circuit breaker main circuit transfer unit 20 to the test position B (second position) and the test position E (second position). )until. In addition, when the switchboard door 扉 92 is closed and the unit operation lever 28 of the front unit 26 is operated with the operation stick, the circuit breaker main circuit transfer unit 20 having casters 21 is mechanically moved in a horizontal direction and is disconnected. The device main circuit 31 reaches the connection position C (third position). That is, the circuit breaker unit is provided with an external operation mechanism.

FIG. 3 is an overall circuit diagram for explaining the structure of a circuit breaker provided with an interlocking mechanism in a panel according to an embodiment of the present invention. The circuit breaker main circuit 31 which performs switching operation is placed in the test position (second position). In this state, the circuit breaker main circuit 31 is cut off from the connection portion 105. In the circuit breaker unit, current flows in the direction of the arrow shown on the circuit breaker main circuit 31. The circuit breaker main circuit 31 is cut off from the connection portion 105 even at the test position. The power receiving circuit for power is usually a three-phase circuit (R-phase, S-phase, T-phase). Therefore, three busbars (horizontal bus bars 103) are arranged in parallel. In the side sectional view of the switchboard, each phase (R-phase, S-phase, T-phase) are connected to the terminal below the main circuit of the upper circuit breaker and the terminal above the main circuit of the lower circuit breaker.

The cable 104 is an insulated wire having a diameter of about several centimeters. The cable 104 is pulled upward from the ground of the switchgear (breaker) to the inside of the switchgear. There is also a way to pull the cable 104 into the switchgear from the top. The converter 106 (CT: Current Transformer) is installed on the bus to detect the current value (hundreds to thousands of A) flowing to the bus. The ○ mark in the erected portion of the cable 104 indicates the connection portion between the bus bar and the front end of the cable being pulled in. The connecting portion 105 can be cut off from the terminal of the circuit breaker main circuit 31. A copper bus bar having a flattened cross section is formed between the connecting portion 105 and the ○ mark.

FIG. 4 is an overall circuit diagram for explaining the structure of a circuit breaker provided with an interlocking mechanism in a panel according to an embodiment of the present invention. The circuit breaker main circuit 31 is placed at the connection position (third position). In this state, the circuit breaker main circuit 31 is connected to the connection portion 105. The main circuit 31 of the circuit breaker performing the switching operation is changed from an open state to a closed state, and a current flows to the two cables 104 in opposite directions. The converter 106 is used to detect the magnitude of the current. Thousands of volts are applied to the bus. The partition wall between the frame of the switchgear and the internal compartments is at ground potential. The busbars are arranged so as to pass through the inverter 106 (CT). Since a voltage of several thousand V is applied to the bus bar, it is designed as a frame or a partition wall of the switching device belonging to the ground potential to ensure a predetermined insulation distance. Moreover, it can also be arrange | positioned so that the said inverter 106 (CT) may be penetrated.

FIG. 5 shows Embodiment 1 for implementing the present invention. A perspective view of the main components of the circuit breaker unit 30. The circuit breaker unit 30 is composed of a compartment 30A (back plate 35, side plate 36, etc.), a circuit breaker main circuit transfer unit 20, a circuit breaker main circuit 31, and the like. In FIG. 5, the circuit breaker main circuit 31 mounted on the circuit breaker main circuit transfer unit 20 is placed in the pulled-out position (first position). In order to protect the core wire extending from the main circuit portion of the switching circuit breaker, an insulation sleeve 34 is provided on the circuit breaker main circuit 31. The front unit 26 is composed of a front unit body 26A, a unit operation handle 22, a unit operation lever 28, and the like. The inter-panel interlocking mechanism 40 may be installed in the main circuit transfer unit 20 of the circuit breaker in the pulled-out position.

The in-panel interlocking mechanism 40 is installed around the circuit breaker main circuit transfer unit 20. The unit operation handle 22 and the unit operation lever 28 are attached to the front unit 26 (front unit body 26A). When the operator pushes the circuit breaker handle 32 (unit operation handle 22) in the direction (P direction), the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31 move in the backward direction (inside). When the operator pulls the circuit breaker handle 32 (unit operation handle 22) back in the lintel side direction (Q direction), the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31 move in the forward direction (front side).

FIG. 6 is a perspective view showing a moving mechanism (a circuit breaker main circuit transfer unit 20 and a front side unit 26) of a circuit breaker unit 30 according to Embodiment 1 of the present invention. The front unit 26 is composed of a front unit body 26A, a unit operation handle 22, a moving-side lock member 23, a cone member 24 (lock release member), a unit operation lever 28, and the like. In the circuit breaker main circuit transfer unit 20, the circuit breaker main circuit 31 is mounted at a pull-out position. When the operator pulls down the unit operating lever 28 in the test position, a circuit breaker is mounted The circuit breaker main circuit transfer unit 20 of the main circuit 31 is separated from the front side unit 26 and is mechanically moved to the connection position on the sliding base 37 of the compartment 30A in the direction of P. When the operator operates the unit operating lever 28 again at the connection position, the circuit breaker unit 30 is mechanically moved in the Q direction above the sliding base 37 of the compartment 30A, and returns to the test position.

Fig. 7 is an enlarged perspective view showing the main constituent elements of the inter-disc interlocking mechanism 40 in the main circuit transfer unit 20 of the circuit breaker for implementing the first embodiment of the present invention. The disc insertion interlock mechanism 40 is composed of a fixed-side lock member 25, a movable-side lock member 23, a cone member 24 (lock release member), and the like. Here, the circuit breaker unit (the circuit breaker main circuit transfer unit 20, the front side unit 26, and the circuit breaker main circuit 31) is placed in the pulled-out position. In addition, the moving-side locking member 23 having a restoring force is placed in the initial position.

A detailed structure of the inter-disc interlocking mechanism 40 will be described with reference to FIG. 7. The fixed-side locking member 25 is provided with a first engaging hole 25a and a second engaging hole 25b. The first engagement hole 25 a corresponds to the moving-side lock member 23. The second engaging hole 25b corresponds to a tapered member 24 having a tapered shape. In the pulled-out position, the moving-side lock member 23 and the tapered member 24 are placed outside (the entrance side) of the fixed-side lock member 25. The moving-side locking member 23 and the tapered member 24 are attached to the front unit 26. The first engaging hole 25a is disposed closer to the front of the switchboard than the second engaging hole 25b.

Fig. 8 is a plan view for explaining the main operation of the circuit breaker main circuit transfer unit 20 for implementing the first embodiment of the present invention. In FIG. 8, the circuit breaker main circuit transfer unit 20 (circuit breaker main circuit 31) is Placed in the test location. FIG. 8 shows the breaker main circuit transfer unit 20, the fixed-side lock member 25, the slide base 37 (bottom plate), the front unit 26, the breaker main circuit 31, and the like. In order to ensure electrical safety, the operator operates the unit operating lever 28 from the outside of the switchboard door cymbal 92 (the switchboard 90) by using the operating stick 70.

In order to operate the unit operating lever 28, the operator inserts the operating rod 70 from the door panel opening 92a opened in the switch panel door panel 92 into the switch panel body 91. When the operating unit operates the lever 28, the circuit breaker main circuit transfer unit 20 is separated from the front side unit 26 and slides on the slide base 37. The circuit breaker main circuit transfer unit 20 is moved toward the inside of the switchboard (P direction, see FIG. 5) to the connection position of the circuit breaker unit 30. The fixed-side locking members 25 are provided at two locations on the left and right of the circuit breaker main circuit transfer unit 20.

A cone member 24 having a cone portion is attached to the front unit 26 on the opposite side of the unit operating lever 28. The cone member 24 operates in cooperation with the moving-side lock member 23 and the unit operation handle 22. When the operator moves the unit operation handle 22 in the center direction, the cone member 24 also moves in the center direction, so the position lock of the interlocking mechanism 40 inserted in the disc is released.

Fig. 9 is a front view showing the main configuration of the circuit breaker unit 30 according to the first embodiment for implementing the present invention. The circuit breaker unit 30 includes a circuit breaker main circuit 31, a circuit breaker main circuit transfer unit 20, a front unit 26, and the like. A unit operation lever 28, a unit operation handle 22, a moving-side locking member 23, a cone member 24, and the like are attached to the front-side unit 26. Cone The member 24 is disposed on the back side of the moving-side locking member 23. The unit operation handle 22 of the front unit 26 can be manually moved by the operator in the center direction (arrow direction) of the front unit 26 (the circuit breaker main circuit 31).

When the operator moves the unit operation handle 22 of the front unit 26 toward the center, the moving-side locking member 23 (and the cone member 24) of the front unit 26 also moves toward the pull-in position while retracting in the center direction. When the moving-side locking member 23 is pulled in in the center direction, the position lock of the interlocking mechanism 40 inserted in the disc is released. When the unit operating lever 28 is pulled down to the right in the test position, the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31 are separated from the front side unit 26 and enter inward.

FIG. 10 is a side view showing main components of the circuit breaker main circuit 31 and the circuit breaker main circuit transfer unit 20 according to the first embodiment for carrying out the present invention. The circuit breaker unit 30 includes a circuit breaker main circuit transfer unit 20, a slide base 37 (bottom plate), a front unit 26, a circuit breaker main circuit 31, and the like. A circuit breaker main circuit 31 is mounted on the circuit breaker main circuit transfer unit 20. When the circuit breaker unit 30 is placed at the test position B, when the operator operates the unit operation lever 28, the circuit breaker main circuit transfer unit 20 is slidably moved toward the connection position C on the slide base 37.

Fig. 11 is a front view showing the main configuration of the front side unit 26 according to the first embodiment for carrying out the present invention. Fig. 11 is an enlarged view showing the vicinity of the unit operation handle 22 according to the first embodiment of the present invention. The state where the unit operation handle 22, the moving-side locking member 23, and the cone member 24 of the front side unit 26 are at the initial positions is shown. The cone member 24 is fixed to the back side of the front side unit 26 with a rivet 24a. When the unit operating handle 22 is retracted by the operator When the state (pulled-in position) is released, it will return from the center to the outside by the action of the return spring 27. The operation of the unit operation handle 22, the moving-side lock member 23, and the cone member 24 are interlocked.

Fig. 12 is a front view showing the main configuration of the front side unit 26 according to the first embodiment for implementing the present invention. FIG. 12 is an enlarged view of the vicinity of the operation handle 22 of the display unit. The unit operating handle 22, the moving-side locking member 23, and the cone member 24 of the front side unit 26 are shown retracted to the pulled-in position. When the operator releases the unit operation handle 22 from the retracted state, the unit operation handle 22 returns to the initial position (outer direction) from the pulled-in position (central direction) by the action of the return spring 27. The operation of the unit operation handle 22, the moving-side lock member 23, and the cone member 24 are interlocked.

Fig. 13 is an enlarged top view of the vicinity of the unit operation handle 22 according to the first embodiment of the present invention. The form of the cone member 24 for implementing the embodiment of the present invention will be described in detail with reference to FIG. 13. The cone member 24 of the front unit 26 is fixed to the front unit body 26A with a rivet 24a. The tapered member 24 has a tapered shape of the main side 24b in such a manner that the width is reduced toward the inner side of the front side unit 26 (and the circuit breaker main circuit transfer unit 20). The main side 24b of the tapered member 24 functions to release the mobile-side lock member 23 attached to the front unit 26 from the locked position of the circuit breaker main circuit transfer unit 20.

That is, when the circuit breaker main circuit transfer unit 20 connected to the front side unit 26 is moved from the pulled-out position (first position) toward the inside of the switchboard, and the cone member 24 of the front side unit 26 comes into contact with the fixed-side lock member 25, The moving-side locking member 23 of the front-side unit 26 will be linked to the front-side unit. The central direction of element 26 moves toward the pull-in position. In addition, in FIG. 13, although the taper member 24 is configured to be inclined toward the center direction with respect to the insertion direction of the main circuit of the breaker, the shape of the taper member 24 is not limited to this. Although the moving-side lock member 23 and the tapered member 24 are formed of different parts, the method of forming the tapered is not particularly limited.

Fig. 14 is an enlarged side view showing the vicinity of the unit operation handle 22 of the front side unit 26 according to the first embodiment of the invention. The form of the unit operation handle 22 for implementing the embodiment of the present invention will be described in detail with reference to FIG. 14. The unit operation handle 22 and the tapered member 24 are fixed to the front unit body 26A with rivets 24a. The tapered member 24 is a tapered main side 24b. The unit operation handle 22 is inclined in consideration of ease of grip.

FIG. 15 is an enlarged side view showing the main constituent elements of the disc insertion interlocking mechanism 40 according to this embodiment. FIG. 15 shows the circuit breaker main circuit transfer unit 20, the circuit breaker main circuit 31, the moving-side locking member 23, the cone member 24, the fixed-side locking member 25, the front-side unit 26, and the like. In Fig. 15, the circuit breaker main circuit 31 is placed in the pulled-out position. The first engaging hole 25a and the second engaging hole 25b are respectively processed in the fixed-side locking member 25. The moving-side lock member 23 is located at an initial position.

The first engaging hole 25 a is opened to have a size corresponding to the moving-side locking member 23. The second engaging hole 25 b is opened to correspond to the size and height of the tapered member 24. The casters 21 of the circuit breaker main circuit transfer unit 20 move the main shaft while sliding on the inner side 25d of the fixed-side lock member 25 so that the circuit breaker main circuit 31 does not protrude. When the circuit breaker main circuit transfer unit 20 moves from the pulled-out position to the test position, the cone member The 24 series receives resistance from the fixed-side locking member 25. Due to this resistance, the moving-side locking member 23 is pulled in while retracting toward the center of the front-side unit 26.

Fig. 16 is a perspective view showing main components of the circuit breaker unit 30 according to the first embodiment for carrying out the present invention. In FIG. 16, the situation where the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31 are located at a test position is shown. The fixed-side locking member 25 is mounted around the circuit breaker main circuit transfer unit 20 so as to be orthogonal to the front-side unit 26. The fixed-side lock member 25 is fixed to the circuit breaker unit 30 (the compartment 30A). In the test position, the movement of the front-side unit 26 and the circuit breaker main circuit transfer unit 20 is restricted because the moving-side locking member 23 is engaged with the fixed-side locking member 25.

Fig. 17 is an enlarged side view showing the main components of the inter-disc interlocking mechanism 40 for implementing the first embodiment of the present invention. FIG. 17 shows the circuit breaker main circuit transfer unit 20, the circuit breaker main circuit 31, the moving-side lock member 23, the fixed-side lock member 25, and the like. In FIG. 17, the circuit breaker unit 30 (the circuit breaker main circuit 31) is placed at a test position. The first engaging hole 25 a of the fixed-side lock member 25 is engaged with the movable-side lock member 23. The second engaging hole 25 b of the fixed-side locking member 25 is engaged with the tapered member 24. Therefore, the front-side unit 26 is locked in position with respect to the fixed-side lock member 25 and cannot move further inward. The moving-side lock member 23 is located at an initial position.

Fig. 18 is a perspective view showing main components of a circuit breaker unit 30 for implementing an embodiment of the present invention. In Figure 18, The situation where the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31 are located at the connection position is shown. At the connection position of the circuit breaker unit 30, the first engaging hole 25a is engaged with the moving-side locking member 23. At the same time, at the connection position of the circuit breaker unit 30, the second engaging hole 25b is engaged with the cone member 24. Therefore, the front-side unit 26 is locked in position with respect to the fixed-side lock member 25 and cannot move further inward. When the operator pulls the unit operating lever 28 horizontally from outside the panel, the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31 move mechanically toward the inside of the switchboard, so that the circuit breaker unit 30 is placed. At the connection position. The circuit breaker main circuit 31 which has reached the connection position is in a state where the connection of the core wires is completed (see FIG. 4).

As described above, the circuit breaker unit of this embodiment has an external operating mechanism, and the position of the circuit breaker main circuit (breaker body) can be between the test position and the connection position when the door of the switchboard is closed. Do it. A circuit breaker main circuit 31 is mounted on the circuit breaker main circuit transfer unit 20. The operator is a person who operates the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31 in the P direction and the Q direction in a state where the door panel of the switchboard is opened to insert and pull out the panel. During the insertion operation, the operator holds the unit operation handle 22 and applies a force in the direction of P in the figure to perform the insertion operation of the main circuit of the circuit breaker.

In the present embodiment, a lock release member (cone member 24) for automatically releasing the position lock is connected to the moving-side lock member 23. The cone member 24 is fastened to the unit operation handle 22. The unit operating handle 22 is provided with a restoring spring 27 (returning spring), and the unit operating handle 22 returns to the outside of the circuit breaker in an automatic manner. The operator is holding open circuit during insertion operation Holder handle 32 for inserters inside the disc.

During the insertion operation, the cone member 24 of the front unit 26 is engaged with the second engaging hole 25b of the fixed-side locking member 25, and the cone member 24 of the front unit 26 will face the center of the circuit breaker main circuit transfer unit 20. mobile. As the linkage with the central movement of the cone member 24 of the front unit 26 causes the moving lock member 23 to move toward the center of the circuit breaker main circuit transfer unit 20 as well, the movement lock mechanism can be automatically operated during the insertion operation. Lifted.

In the present embodiment, in the circuit breaker unit 30, the taper member 24 is provided in the circuit breaker insertion direction of the moving-side locking member 23, and the moving-side locking member can be automatically released when it is inserted in the disc. Therefore, since the operator does not need to release the locking member on the moving side during the insertion operation, the breaker handle 32 can be held to perform the insertion operation of the circuit breaker main circuit 31. Since the breaker handle 32 is arranged near the center of gravity of the breaker main circuit 31, and the force applied by the operator is only in the direction of P in the figure, the operating force can be reduced.

That is, the circuit breaker of the present embodiment includes: a circuit breaker main circuit that performs a switching operation; a circuit breaker main circuit transfer unit that transports the circuit breaker main circuit; and a fixing provided with a first engaging hole and a second engaging hole. A side lock member; a front side unit on which a lock release member and a moving side lock member are installed; and a switchboard that accommodates a circuit breaker main circuit mounted on the circuit breaker main circuit transfer unit; the first engaging hole is arranged in a position larger than the foregoing The second engaging hole is closer to the front side of the power distribution board; when the main circuit transfer unit of the circuit breaker connected to the front unit is moved from the first position toward the power distribution unit, When the back side of the electric panel is moved and the lock release member of the front unit is in contact with the fixed side lock member, the moving side lock member of the front unit will move in the center direction of the front unit. When the circuit breaker main circuit is transported When the unit reaches a second position closer to the back than the first position, the moving-side locking member and the lock-releasing member are engaged with the first engaging hole and the second engaging hole, respectively, so as to engage with the front side. The movement of the unit-connected circuit breaker main circuit transfer unit is locked.

Embodiment 2

Hereinafter, a circuit breaker provided with an in-panel interlocking mechanism according to Embodiment 2 of the present invention will be described with reference to the drawings. Fig. 19 is a perspective view for explaining a disc insertion interlocking mechanism 40 according to the second embodiment of the present invention. In the figure, the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31 are placed in a pull-out position. The disc insertion interlocking mechanism 40 of the second embodiment is different in shape from the moving side locking member 23 and the fixed side locking member 25 of the disc insertion interlocking mechanism of the first embodiment.

Fig. 20 is a perspective view showing the main components of the inter-disc interlocking mechanism 40 for implementing the second embodiment of the present invention. FIG. 20 is an enlarged view of the vicinity of the main circuit transfer unit 20 and the unit operation handle 22 of the circuit breaker. In Figure 20. The circuit breaker main circuit 31 is placed in the pulled-out position. The moving-side locking member 23 according to the second embodiment is processed into a mountain shape, and is provided with a tapered member 23a (a lock release member or a tapered surface) bent in the middle. The fixed-side locking member 25 of the second embodiment is provided with the engaging hole 25c at only one position at a position corresponding to the moving-side locking member 23.

Fig. 21 is a side view showing the main constituent elements of the inter-disc interlocking mechanism 40 for implementing the second embodiment of the present invention. In Fig. 21, the circuit breaker main circuit 31 is placed in the pulled-out position. The moving-side locking member 23 of the second embodiment also moves in the center of the front-side unit 26 in cooperation with the unit operation handle 22. The fixed-side locking member 25 of the second embodiment is provided with the engaging hole 25c at only one position at a position corresponding to the moving-side locking member 23. The tapered member 23a (tapered surface) of the moving-side locking member 23 has a tapered shape, and receives resistance from the fixed-side locking member 25 when the circuit breaker main circuit transfer unit 20 moves from the pulled-out position to the test position.

Fig. 22 is a perspective view showing the main components of a circuit breaker unit 30 according to a second embodiment for carrying out the present invention. In Fig. 22, the circuit breaker unit 30 (the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31) is shown in a test position. In the circuit breaker main circuit transfer unit 20, fixed-side locking members 25 are mounted on the left and right so as to be orthogonal to the front-side unit 26. An engagement hole 25c is attached to the fixed-side locking member 25 of the second embodiment at a position corresponding to the moving-side locking member 23. In the test position of the circuit breaker unit 30, the engaging hole 25c of the fixed-side locking member 25 is engaged with the moving-side locking member 23 of the front-side unit 26.

Fig. 23 is an enlarged side view showing the main components of the inter-disc interlocking mechanism 40 for implementing the second embodiment of the present invention. FIG. 23 is an enlarged view of the circuit breaker main circuit transfer unit 20, the moving-side locking member 23, and the fixed-side locking member 25. In Fig. 23, the circuit breaker unit 30 is placed in a test position. The engaging hole 25c of the fixed-side locking member 25 is engaged with the moving-side locking member 23 of the second embodiment. So the front side is single The element 26 is locked with respect to the fixed-side locking member 25 and cannot move further inward.

As described above, the circuit breaker unit of this embodiment has an external operating mechanism, and the position of the circuit breaker main circuit (breaker body) can be between the test position and the connection position when the door of the switchboard is closed. Do it. A circuit breaker main circuit 31 is mounted on the circuit breaker main circuit transfer unit 20. The operator is a person who operates the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31 in the P direction and the Q direction in a state where the door panel of the switchboard is opened to insert and pull out the panel. During the insertion operation, the operator holds the unit operation handle 22 and applies a force in the direction of P in the figure to perform the insertion operation of the main circuit of the circuit breaker.

In the present embodiment, a lock release member (tapered member 23a: tapered surface) is provided in the mobile-side lock member 23 to automatically release the position lock. The moving-side locking member 23 having the tapered member 23 a is fastened to the unit operation handle 22. The unit operating handle 22 is provided with a restoring spring 27 (returning spring), and the unit operating handle 22 returns to the outside of the circuit breaker in an automatic manner. The operator is an inserter who holds the breaker handle 32 during the insertion operation to perform an in-disk insertion.

During the insertion operation, by engaging the moving-side locking member 23 with a tapered surface with the engaging hole 25c of the fixed-side locking member 25, the moving-side locking member 23 with a tapered surface will be moved toward the circuit breaker main circuit transfer unit 20. Move in the center direction. Due to the interlocking movement of the tapered surface of the mobile-side lock member 23 in the center direction, the mobile-side lock member 23 also moves in the center direction of the main circuit transfer unit 20 of the circuit breaker. Automatic release of the mobile lock mechanism.

In the present embodiment, a tapered surface (tapered member 23a) is provided in the breaker insertion direction of the moving-side locking member 23 in the breaker unit 30, so that the moving-side locking member can be automatically released when it is inserted in the disk. Therefore, since the operator does not need to release the locking member on the moving side during the insertion operation, the breaker handle 32 can be held to perform the insertion operation of the circuit breaker main circuit 31. The circuit breaker handle 32 is arranged near the center of gravity of the circuit breaker main circuit 31, and the force applied by the operator is only in the direction of P in the figure, so that the operating force can be reduced.

That is, the circuit breaker of this embodiment includes: a circuit breaker main circuit that performs a switching operation; a circuit breaker main circuit transfer unit that transports the circuit breaker main circuit; a fixed-side locking member provided with an engagement hole; The moving unit on the moving side of the release unit locks the front unit of the unit; and the switchboard that houses the circuit breaker main circuit mounted on the circuit breaker main circuit transfer unit; when the circuit breaker main circuit transfer unit connected to the front unit moves from the first position toward When the back side of the switchboard is moved and the lock release member of the mobile-side lock member is brought into contact with the fixed-side lock member, the mobile-side lock member of the front-side unit moves in a coordinated manner and moves toward the center of the front-side unit. When the main circuit transfer unit of the device reaches a second position closer to the back than the first position, the lock release member of the mobile-side lock member is engaged with the engaging hole, and the circuit breaker main connected to the front unit is connected. The movement of the circuit transfer unit is locked.

Embodiment 3

Hereinafter, a circuit breaker having an in-panel interlocking mechanism according to a second embodiment of the present invention will be described with reference to the drawings. Fig. 24 is a perspective view for explaining a disc insertion interlocking mechanism 40 according to the third embodiment of the present invention. In FIG. 24, the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31 are placed in a pull-out position. The disc insertion interlock mechanism 40 of the third embodiment is different in shape from the fixed-side locking member 25 of the disc insertion interlock mechanism of the first embodiment.

Fig. 25 is a perspective view showing the main components of the inter-disc interlocking mechanism 40 for implementing the third embodiment of the present invention. Fig. 25 is an enlarged view of the vicinity of the circuit breaker main circuit transfer unit 20 and the unit operation handle 22. In Figure 25. The circuit breaker main circuit 31 is placed in the pulled-out position. The moving-side locking member 23 according to the third embodiment is the same as that of the first embodiment, and projects from the front-side unit 26 in the outward direction (anti-central direction). In the fixed-side lock member 25 of the third embodiment, an engagement hole 25e and a fixed-side taper member 25f (a lock release member) are provided at positions corresponding to the moving-side lock member 23. The fixed-side tapered member 25f has a tapered shape and is provided on the entrance side of the fixed-side lock member 25.

In this embodiment, in order to automatically release the position lock, a fixed-side cone member 25f that applies resistance to the moving-side lock member 23 is provided on the disk side. In the figure, although the fixed-side tapered member 25f is configured to be inclined outward with respect to the circuit breaker insertion direction, the tapered shape is not particularly limited. During the insertion operation, the operator holds the breaker handle 32 to perform an in-panel inserter. During the insertion operation, the moving-side locking member 23 receives resistance from the fixed-side taper member 25f, and the moving-side locking member 23 faces the circuit breaker. The main circuit transfer unit 20 moves in the center direction. Finally, since the moving-side locking member 23 is inserted into the engaging hole 25e, the moving-lock mechanism can be automatically released during the insertion operation.

A pair of engaging portions of the moving-side locking member 23 that are engaged with the circuit breaker frame is provided on both sides as viewed from the front side of the disk, and is provided so that each engaging portion can be driven and operated in the width direction of the disk. Unit operation handle 22. The unit operation handle 22 is provided in a state inclined obliquely upward toward the front of the disc. By setting the unit operation handle 22 to be tilted obliquely upward toward the front of the disk, when an operator who operates in front of the circuit breaker operates the moving side lock member 23 with the inclined downward direction, the unit operation handle 22 faces the disk. Compared with the front (vertical) or front (horizontal) situation, the operation becomes easier.

As described above, the circuit breaker unit of this embodiment has an external operating mechanism, and the position of the circuit breaker main circuit (breaker body) can be between the test position and the connection position when the door of the switchboard is closed. Do it. A circuit breaker main circuit 31 is mounted on the circuit breaker main circuit transfer unit 20. The operator is a person who operates the circuit breaker main circuit transfer unit 20 and the circuit breaker main circuit 31 in the P direction and the Q direction in a state where the door panel of the switchboard is opened to insert and pull out the panel. During the insertion operation, the operator holds the unit operation handle 22 and applies a force in the direction of P in the figure to perform the insertion operation of the main circuit of the circuit breaker.

In this embodiment, a lock release member (fixed-side taper member 25f) is provided on the fixed-side lock member 25 to automatically release the position lock. The fixed-side tapered member 25f is integrated with the fixed-side locking member 25. The unit operating handle 22 is provided with a restoring spring 27 (returning spring), and the unit operating handle 22 returns to the outside of the circuit breaker in an automatic manner. The operator is a person who holds the circuit breaker handle 32 to perform an in-panel insertion during the insertion operation.

During the insertion operation, the moving-side locking member 23 of the front-side unit 26 comes into contact with the fixed-side taper member 25f of the fixed-side locking member 25, and the moving-side locking member 23 of the front-side unit 26 will face the center of the circuit breaker main circuit transfer unit 20. Pull-in movement in the direction, so the movement lock mechanism can be automatically released during the insertion operation. Since the unit operation handle 22 is also moved toward the center of the circuit breaker main circuit transfer unit 20 in cooperation with the movement of the moving side locking member 23 of the front unit 26 in the center direction, the movement locking mechanism can be performed during the insertion operation. Automatically released.

In the present embodiment, a fixed-side taper member 25f is provided on the entrance side of the fixed-side lock member 25 in the circuit breaker unit 30, so that the movable-side lock member can be automatically released when it is inserted into the disc. Therefore, since the operator does not need to release the locking member on the moving side during the insertion operation, the breaker handle 32 can be held to perform the insertion operation of the circuit breaker main circuit 31. The circuit breaker handle 32 is arranged near the center of gravity of the circuit breaker main circuit 31, and the force applied by the operator is only in the direction of P in the figure, so that the operating force can be reduced.

That is, the circuit breaker of this embodiment includes: a circuit breaker main circuit that performs a switching operation; a circuit breaker main circuit transfer unit that transports the circuit breaker main circuit; a fixed-side locking member provided with an engagement hole; and a moving side The front side unit of the locking member; and the switchboard that accommodates the main circuit of the circuit breaker mounted on the main circuit transfer unit of the aforementioned circuit breaker; The fixed-side locking member is provided with a lock-releasing member; when the circuit breaker main circuit transfer unit connected to the front-side unit moves from the first position toward the inner side of the switchboard, the moving-side locking member of the front-side unit is locked with the fixed side When the lock release member of the component comes into contact, the moving side locking member of the front unit will move in the center direction of the front unit. When the circuit breaker main circuit transfer unit reaches the second position closer to the inner side than the first position, The moving-side locking member is engaged with the engaging hole, and the movement of the circuit breaker main circuit conveying unit connected to the front-side unit is locked.

In addition, the present invention is within the scope of the invention, and the embodiments can be freely combined, or the embodiments can be appropriately modified and omitted.

Claims (10)

A circuit breaker includes: a circuit breaker main circuit that performs a switching operation; a circuit breaker main circuit transfer unit that transports the circuit breaker main circuit; a fixed-side locking member provided with an engaging hole; and a mobile-side lock having a restoring force A front unit of the component; a switchboard that accommodates the main circuit of the circuit breaker mounted on the main circuit transfer unit of the circuit breaker; a lock release member is installed on the front unit, and the lock release member is disposed more than the mobile-side lock member Near the back side of the switchboard, when the circuit breaker main circuit transfer unit is placed in the first position, the moving-side locking member is in an initial position. When the circuit breaker main circuit transfer unit is moved from the first position toward the switchboard, When the back side moves, the moving side lock member moves to the pull-in position in conjunction with the lock release member. When the circuit breaker main circuit transfer unit reaches a second position closer to the back side of the power distribution board than the first position, the aforementioned The moving-side locking member returns to its initial position from the pulled-in position, and The engaging holes provided on the fixed-side locking member are engaged with each other. The circuit breaker according to item 1 of the scope of patent application, wherein the locking member on the fixed side is provided with an engaging hole for engaging with the unlocking member. The circuit breaker according to item 1 of the scope of patent application, wherein the lock release member is a mobile-side lock member mounted on the front unit. A circuit breaker includes: a circuit breaker main circuit that performs a switching operation; a circuit breaker main circuit transfer unit that transports the circuit breaker main circuit; a fixed-side locking member provided with an engaging hole; and a mobile-side lock having a restoring force A front side unit of the component; a switchboard that accommodates a circuit breaker main circuit mounted on the circuit breaker main circuit transfer unit; a lock release member is installed on the entrance side of the fixed side lock member, and the circuit breaker main circuit transfer unit is placed When placed in the first position, the moving-side locking member is located at the initial position. When the circuit breaker main circuit transfer unit is moved from the first position to the inner side of the switchboard, the moving-side locking member is linked to the unlocking member. When moving toward the pull-in position, when the circuit breaker main circuit transfer unit reaches a second position closer to the back side of the switchboard than the first position, the moving-side locking member returns from the pull-in position to the initial position, and The engaging holes formed on the fixed-side locking members engage with each other. The circuit breaker according to any one of claims 1 to 4, wherein a unit operating lever is mounted on the front unit. The circuit breaker according to item 5 of the scope of patent application, wherein when In the second position, when the operation lever of the unit is moved, the connected front side unit and the circuit breaker main circuit transport unit are separated, and the circuit breaker main circuit mounted on the circuit breaker main circuit transport unit is further moved toward the inner side of the switchboard. Go to position 3. The circuit breaker according to any one of claims 1 to 4 in the scope of patent application, wherein an inclined unit operation handle is installed on the front unit. The circuit breaker according to item 7 of the scope of patent application, wherein the unit operation handle and the moving-side locking member are linked to operate. The circuit breaker according to item 7 of the scope of patent application, wherein the unit operation handle and the moving-side locking member have a restoring force. The circuit breaker according to any one of claims 1 to 4, wherein the switchboard is provided with an opening provided with an opening.