CN1213205A - Enclosed switch board and its drawable switch and interlocking device thereof - Google Patents

Abstract

The present invention relates to a closed switchboard and its pull-out switch and its interlocking device. The interlocking device which restricts the movement of the switch body along the guide piece for interlocking is formed by a plate-shaped interlocking body swingably supported on the switch body. , the interlocking body is provided with a moving interlocking part that locks the movement of the switch body by engaging with the guide, an interlocking releasing part that restrains the interlocking body from swinging when the movable plug is connected to the fixed joint, and a holding The connection holding part for the connection between the fixed joint and the movable plug and the swing restricting part for restraining the interlocking body from swinging when the switch body has moved have the advantages of reducing the number of components of the interlocking device without affecting its function.

Description

Enclosed switchboards and their pull-out switches and their interlocks

The invention relates to a closed switchboard, a pull-out switch assembled in the closed switchboard and an interlocking device suitable for the switch.

The closed type switchboard uses a partition made of grounded metal or insulating material to separate the inside of the outer box that constitutes a grounded metal box into multiple compartments, and separates the branch conductors on the side of the bus connected to the common bus and the conductors connected to other electrical appliances. The load-side conductor connected to the power transmission cable for load transmission such as room and load equipment, the switch composed of a circuit breaker for connecting and disconnecting the two conductors, and the control devices required for monitoring and control are respectively placed in these compartments. indoor.

In the enclosed switchboard as described above, in order to prevent electric shock damage to inspectors due to the voltage remaining on the internal devices during the internal inspection of the above-mentioned compartments, it is necessary to make the internal devices voltage-free before inspection. For this reason, for example, as described in Japanese Patent Laid-Open No. 4-54807, the above-mentioned switch is freely moved from the test position to the operating position along a guide member of a predetermined length arranged in the compartment accommodating the switch. During internal inspection, pull out the above-mentioned switch along the guide to the test position in the compartment, so that the branch conductors on the busbar side and the conductors on the load side are reliably disconnected.

This conventional pull-out switch is now described with reference to FIGS. 8-15 described later. FIG. 8 is a front view of the pull-out switch, FIG. 9 is a side view, and FIG. 10 is a sectional view taken along the line X-X, and FIG. 12 is an explanatory view of the state in which the movable plug of FIG. 10 is connected to the fixed joint, and FIG. 13 is an explanatory view of the state of moving the switch.

The traditional pull-out switch E has a switch circuit on it and a fixed joint F connected to the switch circuit, and can move from the test position shown in Fig. 9(a) to the test position shown in Fig. The switch body H that shows the operating position, and the interlock device J that restricts the movement of the switch body H and performs interlocking.

The above-mentioned fixed joint F and the interlock device J are arranged on the front lower right part of the switch body H, and on the back of the switch body H are provided a contact Y, Y which has been connected to the above-mentioned bus-side branch conductors and load-side conductors. The connection contacts Z, Z. In addition, wheels K, K that can freely roll along the above-mentioned guide G are provided at the left and right lower parts of the front of the switch body H.

The movable plug L connected to the above-mentioned control device is detachably connected to the above-mentioned fixed terminal F from the front side of the switch body H. In addition, a U-shaped plug hook M is pivotally supported on the upper and lower surfaces of the fixed joint F to restrict the movement of the movable plug L relative to the fixed joint F.

The interlocking device J has a hook-shaped interlocking body O and a plug cover P supported freely swingingly on the right side of the switch body H by a horizontal axis N, and a force exerted on one side of the interlocking body O in the swinging direction. A force spring Q and an interlock release lever R supported on a fitting protruding from the switch body H are freely traversable.

This interlock release lever R is a member that restrains the swing of the interlock body O and releases the interlock when the movable plug L is connected to the above-mentioned fixed joint F, and one end of it is in contact with the protrusion 01 protruding from the above-mentioned interlock body O. , the other end of which can reach the inside of the above-mentioned fixed joint F. In addition, a pressing portion S engageable with the other end of the lock release lever R is provided on the movable plug L. As shown in FIG.

The interlocking body O is provided with a concave movement interlocking portion O2 that interlocks the movement of the switch body H by engaging with one end d of the fixed bar D disposed parallel to the guide G.

As shown in FIG. 15 , the connection holding portion P1 is formed on the plug cover P at the end opposite to the support portion facing the switch body H by bending to maintain the connection state of the fixed and movable plugs F and L. When the switch body H has moved, the swing restricting part P2 that restrains the swing of the plug cover P, the contact part P3 that contacts the protrusion D1 protruding from one end of the above-mentioned fixing bar body D, and the contact part P3 that receives the protrusion protruding on the switch body H Arc-shaped guide hole P4 for guide pin T.

For the pull-out switch E constructed as above, when the movable plug L is connected to the fixed joint F of the switch E pulled to the test position, the pressing part S presses the interlock release lever R, and the interlock body O overcomes the applied force The elastic force of the spring Q swings in the clockwise direction in FIG. 11 around the horizontal axis N, and becomes the state shown in FIG. 12 (connection detection release interlock).

Next, when the switch E is moved to the operating position along the guide G, the plug cover P accompanying the movement comes into contact with the protrusion D1 of the fixing bar D as shown in FIG. Figure 12. Swing clockwise. Therefore, in the state shown in FIG. 13 during the movement from the test position to the operating position, the connection holding part P1 of the plug cover P covers the front surface of the movable plug L, and the separation of the movable plug L is restricted (connection and separation prevention).

In addition, in the test position, when the movable plug L is not connected and the switch E is moved to the operating position, since the interlock body O is in a state of being urged toward the fixed bar D side as shown in FIG. 11 , This movement interlocking part O2 is in contact with one end d of the fixed bar D, and the movement of the switch E is restricted (interlocked).

In addition, as described above, when the movable plug L has been connected to the fixed joint of the switch body H pulled to the test position, by rotating the above-mentioned plug hook M clockwise from the position shown by the dotted line in FIG. The position shown enables the pin of the movable plug L to enter into the engaging hole of the plug hook M to be locked. After the movable plug L is locked with the plug hook M, when the switch E is moved to the operation position, the operation part of the plug hook M becomes covered by the lock cover U in the range from the test position to the operation position shortly after the movement. The state is difficult to operate the operation part.

However, since the interlock device J of the above-mentioned pull-out switch E has a structure including the interlock body O, the plug cover P, and the interlock release lever R, the number of components is large. Therefore, there are problems of poor processing and assembling workability and high manufacturing cost.

In view of the above-mentioned problems, the object of the present invention is to provide a member that can make the interlock device A closed switchboard which reduces the number without affecting the function of the interlock device, improves the workability of processing and assembly, and reduces the manufacturing cost, a pull-out switch assembled in the closed switchboard, and an interlock device suitable for the switch.

According to the enclosed switchboard of the present invention, it is provided with a bus-side branch conductor, a load-side conductor, and a pull-out switch capable of connecting and disconnecting the above-mentioned bus-side branch conductor and the load-side conductor. The fixed joint connected to the plug is free to install and disassemble, the switch circuit connected to the fixed joint, the switch body that can be pulled out and moved along a given guide, and the interlock device that locks the switch body, which is characterized in that the interlock device can be used The interlocking body swingably supported on the above-mentioned switch body is composed of a movement interlocking part that restricts the movement of the switch body by engaging with the above-mentioned guide member and performs interlocking. When the fixed joint is connected, the interlock body is restrained from swinging, and the interlock release part is released, and the connection holding part is maintained to maintain the connection state between the fixed joint and the movable plug, and when the switch body has moved, the interlock body is restrained from swinging. of the swing constraint.

In the enclosed switchboard of the present invention, the above-mentioned interlocking can be formed by one board.

In the enclosed switchboard of the present invention, the above-mentioned interlocking body may be formed by a wire.

According to the pull-out switch of the present invention, it is provided with a fixed joint connected to the movable plug and a switch circuit connected to the fixed joint, and a switch body that can be pulled out and moved along a given guide and locked. The interlocking device of the switch body is characterized in that the interlocking device is composed of an interlocking body swingably supported on the above-mentioned switch body, and the interlocking body is provided on the interlocking body to restrict the movement of the switch body by engaging with the above-mentioned guide piece. A moving interlocking part for interlocking, an interlocking release part for restraining the above-mentioned interlocking body from swinging and releasing the interlock when the above-mentioned movable plug is connected to the above-mentioned fixed joint, a connection holding part for maintaining the connection state of the above-mentioned fixed joint and the movable plug, and A swing restricting portion restricts swing of the interlock body when the switch body has moved.

The above-mentioned interlocking body in the switch of the present invention can be formed by one plate.

The above-mentioned interlocking body in the switch of the present invention can be formed by a wire.

According to the interlocking device of the pull-out switch of the present invention, the switch body of the switch can be pulled out and moved along a given guide, and a fixed joint that can be freely connected to the movable plug and a switch circuit connected to the fixed joint are arranged on it. , the interlocking device for locking the switch is characterized in that the interlocking device has an interlocking body that is swingably supported on the switch, and the interlocking body is provided with a mechanism that constrains the switch body by engaging with the above-mentioned guide. The movement interlocking part that moves and interlocks, the interlock release part that restricts the swing of the above-mentioned interlocking body when the above-mentioned movable plug is connected to the fixed joint, and releases the interlock, and the connection that maintains the connection state of the above-mentioned fixed joint and the movable plug A holding portion and a swing restricting portion restricts the swing of the interlocking body when the switch body has moved.

The above-mentioned interlocking body in the interlocking device of the pull-out switch of the present invention can be formed by one plate.

The interlocking body in the interlocking device of the pull-out switch of the present invention can be formed by a wire.

A brief description of the attached drawings.

Fig. 1 is a side view of the switch of the present invention, a part is omitted in the figure,

Fig. 2 is the front view of the switch of the present invention, a part is omitted in the figure,

Fig. 3 is an explanatory diagram showing the operating state of the switch of the present invention,

Fig. 4 is an explanatory diagram showing the switching action process of the present invention,

Fig. 5 is the mode side view showing the closed type switchboard with built-in switch of the present invention,

Fig. 6 is a side view of the switch according to Embodiment 2 of the present invention, part of which is omitted in the figure,

Fig. 7 is a side view of the switch according to Embodiment 3 of the present invention, part of which is omitted in the figure,

Figure 8 shows a front view of a conventional switch,

Figure 9 shows a side view of a conventional switch,

Fig. 10 is an enlarged front view showing the vicinity of a conventional switch connection plug,

Fig. 11 is a cross-sectional view along line X-X in Fig. 10,

Fig. 12 is an explanatory diagram showing a state where the movable plug is connected to the fixed joint,

Fig. 13 is an explanatory diagram for making the switch shown in Fig. 12 move,

Figure 14 is a top view of only the fixed joint and the movable plug part,

Fig. 15 is a perspective view of a plug cover.

Hereinafter, the present invention and its embodiments will be described in detail with reference to the drawings.

Example 1. Fig. 1 is a side view of a switch with a part omitted, Fig. 2 is a front view of a switch with a part omitted, Fig. 3 is an explanatory view showing an operating state, Fig. 4 is an explanatory view showing an operating process, and Fig. 5 is a view showing a built-in switch of the present invention. Side view of an enclosed switchboard pattern with switches.

As shown in Figure 5, the enclosed switchboard uses a partition wall made of grounded metal or insulating material to separate the inside of the rectangular box-shaped metal outer box 1 into a busbar room 1a, a cable room 1b, a switch room 1c and a control mechanism room 1d As a result, the bus-side sub-conductor A is arranged in the busbar room 1a, the load-side conductor B is arranged in the cable room 1b, the freely movable switch c is arranged in the switch room 1c, and the control mechanism (not shown) is accommodated in the control mechanism room 1d. icon).

A pair of guides 2, 2 are arranged in the switch chamber 1c at a predetermined interval in the lateral direction, and are capable of freely guiding the switch c from the test position to the operating position. These guides 2,2 are constituted with upper and lower guide fins 21 and lower guide fins 22 facing each other at predetermined intervals up and down, and connecting fins 23 connecting the upper guide fins 21 and the lower guide fins 22 to form a U-shaped section. On one end of the right guide 2 in the longitudinal direction, a notch 2a is formed by cutting off the above-mentioned upper guide piece 21 and connecting piece 23 .

The switch c includes a switch body 4 provided with a switch circuit and a fixed joint 3 connected to the switch circuit, and an interlock device 5 for restricting and interlocking movement of the switch body 4 from the test position to the operating position.

The movable plug 6 connected with the above-mentioned control mechanism is connected to the fixed joint 3 in a detachable manner from the front of the switch body 4 . In addition, a U-shaped plug hook 31 is rotatably attached to the upper and lower surfaces of the fixed joint 3, and the movement of the movable plug 6 relative to the fixed joint 3 can be restrained.

Fixed joint 3 and interlocking device 5 are installed at the front lower right part of switch body 4, and wheels 7, 7 freely rotating along guides 2, 2 are set at front left and right lower parts, so that switch body 4 can move freely by wheels 7, 7.

The interlocking device 5 is formed by an interlocking body 50 that is freely swingably supported on the right side of the switch body 4 by a vertical support shaft 8 erected between a pair of supporting pieces 4a, 4a facing each other at a predetermined interval up and down. . The interlocking body 50 is elastically biased clockwise in FIG. 4( a ) by a coiled urging spring 9 wound around the support shaft 8 .

The interlocking body 50 of Embodiment 1 shown in Figures 1-4 is formed with a plate body, and a pair of curved pieces 5a, 5a are protruded from the upper and lower ends of the central part in the front-rear direction of the body, and the above-mentioned support shaft 8 is inserted into the These bent pieces 5a, 5a penetrate into the through-holes provided.

As shown in Figure 1, on the interlocking body 50 that constitutes with the plate body, on the relative swing center, on the rear lower end of the moving direction, the upper guide piece that protrudes below the support position and can be connected with the notch 2a of the guide piece 2 is provided. The moving interlocking part 51 that 21 contacts is set on the relative swing center and the front upper end of the moving direction, protruding above the support position and being connected with the fixed joint 3. The force spring 9 causes the interlock release part 52 that swings and the connection holding part 53 that bends from the front end of the interlock release part 52 to one side of the fixed joint 3 to be provided on the lower end of the front end of the relative swing center and moving direction toward the support. The swing restricting portion 54 protrudes below the position and can contact the top end edge 21 a of the upper guide piece 21 of the guide member 2 .

For the pull-out switch c constructed as above, if the movable plug 6 is connected to the fixed joint 3 of the switch body 4 that has been pulled out along the guide 2 at the test position, and the switch C is moved to the operating position, due to As shown in Figure 4 (a), the interlocking body 50 is in a state of being stressed to the guide member 2 side due to the biasing spring 9, so that the movement interlocking portion 51 contacts the upper guide piece 21 of the notch 2a of the guide member 2, Movement of switch c is constrained (interlock).

In addition, when the movable plug 6 is to be connected to the fixed joint of the switch c being pulled out at the test position, by making the interlock body 50 overcome the elastic force of the spring 9, as shown in FIG. The direction swing can make the connection holding part 53 retreat from the connection route of the movable plug. Therefore, the movable plug 6 can be easily connected to the fixed joint 3 . In addition, when the interlocking body 50 is made to overcome the elastic force of the spring 9 and swing counterclockwise as shown in FIG. The notch 2a is provided on the upper part, and the interlocking body 50 can be swung as described above.

After the movable plug 6 is connected, the interlocking body 50 swings in the clockwise direction of Fig. 4(b) due to the force of the biasing spring 9, and the interlock release part 52 is connected to the movable plug 6 as shown in Fig. 4(c). The side contact makes the interlocking body 50 constrained to swing by the biasing spring 9 , and becomes parallel to the interlocking body 50 and the guide member 2 . Therefore, the movement interlocking portion 51 is prevented from coming into contact with the upper guide piece 21 of the notch portion 2a of the guide 2, and the switch body 4 can be moved along the guide 2 (connection detection release interlock).

In this case, as shown in FIG. 4( c), since the connection holding portion 53 enters the connection path of the movable plug 6 and faces the front face of the movable plug 6, the movable plug can be prevented from being pulled out, and the fixed joint 3 can be held. The state of connection with the movable plug 6.

In the case where the movable plug 6 is connected to the fixed joint as described above, since the interlock body 50 can be restrained from swinging due to the biasing spring 9 and the interlock is released, the switch C can be moved along the guide members 2 and 2. Move from test position to operating position. As the switch C moves, the swing restricting portion 54 contacts the top edge 21a of the upper guide piece 21 of the guide piece 2, and the swing of the interlock body 50 is constrained by the guide piece 2, so that the fixed joint 3 and the movable plug can be reliably maintained. 6 connection status.

Example 2. Embodiment 2 will now be described with reference to FIG. 6 .

In this second embodiment, as shown in FIG. 6, the interlocking body 50 is rotatably supported by the lateral support shaft 8A instead of the interlocking body 50 being rotatably supported by the vertical support shaft 8 as in the first embodiment. The basic structure is the same as that of Embodiment 1, so the illustration and detailed description of the same parts are omitted.

In the embodiment shown in FIG. 6, an interlock body 50A is supported so as to be freely swingable by a support shaft 8A protruding laterally from the right side of the switch body 4. As shown in FIG. The interlocking body 50A is composed of a substantially triangular plate, and the above-mentioned support shaft 8A is inserted into a through hole formed in the upper and lower middle parts thereof, and a biasing spring 9A is provided between the interlocking body 50A and the switch body 4 .

As shown in Figure 6, on the interlock 50A formed by the plate body, a moving interlocking part that can contact the upper guide piece 21 of the notch part 2a of the above-mentioned guide member 2 is provided on the lower end relative to the swing center and the moving direction. 51A, on the front upper end of the relative swing center and moving direction, it is provided with the front face of the movable plug 6 that has been connected with the fixed joint 3, and the interlock release part 52A that constrains the swing caused by the force spring 9A of the interlock body 50A and The connecting holding portion 53A is provided with a swing restricting portion 54A that can contact the upper surface of the upper guide piece 21 of the guide member 2 at the front lower end portion relative to the swing center and in the moving direction.

For the pull-out switch C of Embodiment 2 constituted as above, when the movable plug 6 is not connected to the fixed joint 2 of the switch C that has been pulled out at the test position, and moves to the operating position along the guide 2, due to the connection The lock body 50A is in the position shown in FIG. 6 , that is, the interlocking portion 51A enters the notch 2a of the guide 2 and is held under pressure. The moving interlocking portion 51A contacts the upper guide piece 21 of the notch 2a of the guide 2 , The movement of switch C is restricted (interlock).

In addition, when the movable plug 6 is to be connected to the fixed joint 3 of the switch C that has been pulled to the test position, the connection holding part 53A can be made to swing counterclockwise by making the interlock body 50A overcome the elastic force of the spring 9A to swing counterclockwise. Step back from the connection route of the movable plug 6. Therefore, the movable plug 6 can be easily connected to the fixed terminal. In addition, when the interlocking body 50A is made to oscillate in the counterclockwise direction of FIG. 6 against the urging spring 9A, a notch 2 a is provided on one end of the guide 2 in order to prevent the swing restricting portion 54A from interfering with the guide 2 . , the interlocking body 50A can be swung as described above.

After the movable plug 6 is connected, the interlock body 50A swings due to the force of the spring 9, and the interlock release part 52A and the connection holding part 53A contact with the front of the movable plug 6 so that the interlock body 50A is affected by the swing caused by the spring 9A. Constrained, the lower end of the interlocking body 50A is parallel to the guide piece 2 . Therefore, the movement interlocking portion 51A is prevented from coming into contact with the upper guide piece 21 of the notch portion 2a of the guide 2, and the switch C can be moved along the guide 2 (connection detection release interlock).

In this case, since the interlock release part 52A and the connection holding part 53A face the front of the movable plug 6, the movable plug 6 can be prevented from being pulled out, and the connection state of the fixed terminal 3 and the movable plug 6 can be maintained.

In the case where the movable plug 6 has been connected to the fixed joint 3 as described above, the restraint interlock body 50A can be formed in a state in which the interlock is released due to the swing caused by the biasing spring 9A, so the switch C can be moved from the test position along the guide member 2. The position moves to the running position. As the switch C moves, the swing restricting portion 54A contacts the top of the upper guide piece 21 of the guide 2, and the swing of the interlock body 50A is constrained by the guide 2, so the fixed joint 3 and the movable plug can be reliably maintained. 6 connection status.

Example 3. Hereinafter, Example 3 shown in FIG. 7 will be described.

This embodiment 3, as shown in Figure 7, is to replace the interlocking body 50A that is supported on the switch body 4 with a plate body that can swing freely through the transverse support shaft 8A as in embodiment 2, because a bent wire rod is used. Its basic structure is the same as that of Embodiments 1 and 2, so illustrations and detailed descriptions of the same parts are omitted.

Embodiment 3 shown in FIG. 7 employs an interlocking body 50B supported to swing freely by a support shaft 8A protruding laterally from the right side of the switch body 4 . The interlocking body 50B has a first rod portion 55 and a second rod portion 56 extending in the vertical direction and disposed front and rear in the moving direction, and a connecting rod portion connecting the upper end of the first rod portion 55 and the lower end of the second rod portion 56 . 57, a support piece 58 is provided on the rod portion of the connecting rod portion 57, and the support shaft 8A is inserted into the through hole provided on the support piece 58, and a force spring 9A is set between the connecting rod portion 57 and the switch body 4.

As shown in FIG. 7 , in the interlocking body 50B formed of wire rods, the lower end portion of the first rod portion 55 that is on the lower side relative to the swing center and the moving direction is provided with an upper portion that can be connected to the notch portion 2 a of the guide member 2 . The movement interlocking portion 51B that the guide piece 21 contacts is provided on the upper end portion of the second rod portion 56 that is on the front upper side relative to the swing center and the moving direction and is bent toward the side of the fixed joint 3, and is connected to the fixed joint 3. The front surface of the movable plug 6 is in contact with the interlocking body 50B, and the interlocking release part 52B and the connection holding part 53B caused by the biasing spring 9A swing, and the second rod part 56 on the lower side of the moving direction relative to the center of the swing. A swing restricting portion 54B that can contact the upper surface of the upper guide piece 21 of the guide member 2 is provided on the lower end portion of the guide member 2 .

For the pull-out switch C of Embodiment 3 constituted as above, whether to connect the movable plug 6 to the fixed joint 3 of the switch C that has been pulled to the test position along the guide 2, and move the switch C to the operating position In this case, since the interlocking body 50B is in the position of Fig. 7 which is held by force due to the biasing spring 9A, that is, the state in which the moving interlocking part 51B is in the position in the notch 2a of the entry guide 2, the moving interlocking part 51B is in contact with the upper guide piece 21 of the notch 2a of the guide 2, and the movement of the switch C is restricted (interlocked).

In addition, when the movable plug 6 is to be connected to the fixed joint 3 of the switch C which has been pulled to the test position, the connection holding part 53B can be made to swing counterclockwise by making the interlock body 50B overcome the elastic force of the spring 9A to swing counterclockwise. Step back from the connection route of the movable plug 6. Therefore, the movable plug 6 can be easily connected to the fixed joint 3 . In addition, when the interlocking body 50B is made to overcome the elastic force of the spring 9A and swing counterclockwise in FIG. The part 2a can swing the interlocking body 50B as described above.

After the connection of the movable plug 6, the interlock body 50B swings due to the force of the urging spring 9A, and the interlock release part 52B connects the holding part 53B to the front surface of the movable plug 6, so that the interlock body 50B is energized by the urging spring. The swing by 9A is restrained, and the movement interlocking portion 51B of the interlocking body 50B is located on the upper side of the opposing guide 2 . Therefore, the movement interlocking portion 51B is prevented from coming into contact with the upper guide piece 21 of the notch portion 2a of the guide 2, and the switch C can be moved along the guide 2 (connection detection, interlock release).

In this case, since the interlock releasing portion 52B and the connection holding portion 53B face the front of the movable plug, the movable plug 6 can be prevented from being pulled out, and the connection state between the fixed terminal 3 and the movable plug 6 can be maintained.

In the case where the movable plug 6 is connected to the fixed joint 3 as described above, the restraint interlock body 50B can be formed in a state where the interlock is released due to the swing caused by the biasing spring 9A, and the switch C can be moved from the test position along the guide member 2. to the operating position. As the switch C moves, the swing restraining portion 54B contacts the top of the upper guide piece 21 of the guide piece 2, so that the swing of the interlock body 50B is constrained by the guide piece 2, so the fixed joint 3 and the movable joint can be reliably maintained. Connection status of plug 6.

In addition, in the above Embodiments 1-3, the switch C using a pull-out circuit breaker has been described, but the switch C in the present invention may be a switch of other circuit breakers or the like.

According to the closed switchboard and its pull-out switch and its interlocking device of the present invention, since the interlocking body swingably supported on the switch body is provided with a moving interlocking part and a constraint interlocking part for interlocking the movement of the switch body The body swings, the interlock release part that releases the interlock, the connection holding part that maintains the plug connection state, and the swing restraint part that restricts the swing of the interlock body can not affect the function of the interlock device and reduce the number of parts of the interlock device. Therefore, the cumulative error and accident rate caused by the large number of components can be reduced. Furthermore, manufacturing and assembly operations can be simplified, and manufacturing costs can be reduced.

In addition, according to the present invention, the closed switchboard and its pull-out switch and its interlocking device can be easily formed by plate forming or wire bending processing, which can further reduce the manufacturing cost.

Claims (9)

1. enclosed type distribution board, possesses the bus bar side branch conductors, load side conductor and can make above-mentioned bus bar side branch conductors and load side conductor is connected, the drawer type switch that disconnects, this switch possesses on it setting can freely load and unload permanent joint that links to each other and the switching circuit that links to each other with this permanent joint with movable plug, and the interlock that can pull out mobile switch body and pin this switch body along given guide, it is characterized in that, this interlock constitutes with the interlock body that is bearing in swingably on the above-mentioned switch body, on this interlock body, be provided with by with the moving of above-mentioned guide engagement constraint switch parent, the traveling locking part of interlocking, when above-mentioned movable plug links to each other with the said fixing joint, retrain above-mentioned interlock body swing, remove the interlocking releasing portion of interlocking, being connected maintaining part and when above-mentioned switch body is mobile, retraining the swing constriction that above-mentioned interlock body is swung of connection status that keeps said fixing joint and movable plug.

2. according to the described distribution board of claim 1, it is characterized in that above-mentioned interlock body is formed by a plate body.

3. according to the described distribution board of claim 1, it is characterized in that above-mentioned interlock body is formed by the single line material.

4. drawer type switch, possessing on it setting can permanent joint that link to each other with movable plug automatic loading and unloading and the switching circuit that links to each other with this permanent joint, and the interlock that can pull out mobile switch body and pin this switch body along given guide, it is characterized in that this interlock constitutes with the interlock body that is bearing in swingably on the above-mentioned switch body, is provided with by engaging with above-mentioned guide on this interlock body, the constraint switch body moves the traveling locking part of interlocking, when above-mentioned movable plug links to each other with the said fixing joint, retrain above-mentioned interlock body swing, remove the interlocking releasing portion of interlocking, maintenance said fixing joint is connected maintaining part and retrains the swing constriction that above-mentioned interlock body is swung when above-mentioned switch body is mobile with movable plug connection status.

5. according to the described switch of claim 4, it is characterized in that described interlock body is formed by a plate body.

6. according to the described switch of claim 4, it is characterized in that described interlock body is formed by the single line material.

7. the interlock of a drawer type switch, the switch body of this switch can be pulled out mobile along given guide, setting can freely be loaded and unloaded permanent joint that links to each other and the switching circuit that links to each other with this permanent joint with movable plug and for pinning the described interlock of this switch on it, it is characterized in that described interlock possesses the interlock body that is bearing in swingably on the above-mentioned switch, be provided with on this interlock body by with the moving of above-mentioned guide engagement constraint switch body, the traveling locking part of interlocking, when above-mentioned movable plug has linked to each other with permanent joint, retrain above-mentioned interlock body swing, remove the interlocking releasing portion of interlocking, maintenance said fixing joint is connected maintaining part and retrains the swing constriction that above-mentioned interlock body is swung when above-mentioned switch body is mobile with movable plug connection status.

8. according to the described interlock of claim 7, it is characterized in that above-mentioned interlock body is formed by a plate body.

9. according to the described interlock of claim 7, it is characterized in that above-mentioned interlock body is formed by the single line material.

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