TWI472109B - Drawer type circuit breaker - Google Patents

Description

Drawer type circuit breaker

The invention relates to an automatic energy dissipating mechanism for automatically releasing energy storage closed-circuit springs when the circuit breaker body of the drawer type circuit breaker is drawn out.

In the drawer type circuit breaker of the prior art, when the closed circuit spring that performs the closed circuit of the open/close contact is in the state of energy storage, when the circuit breaker body is withdrawn from the extraction frame, it may be accidentally caused after being extracted. Closed-circuit springs occasionally release energy and cause accidents. Therefore, there is an automatic release mechanism that automatically releases energy from the closed-circuit spring when the circuit breaker body is pulled out. In such a drawer type circuit breaker, a conventionally known method is to provide an extraction detecting unit that extracts a circuit breaker main body from a drawing frame at a bottom portion of the circuit breaker main body, and a connecting mechanism coupled to the extraction detecting unit for performing a closed circuit spring. Release energy (for example, refer to Patent Document 1).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2008-228563 No. 4

In the drawer type circuit breaker of the prior art in the above manner, since the automatic release mechanism of the closed circuit spring is disposed on the bottom surface of the circuit breaker body, after the circuit breaker body is withdrawn from the extraction frame, when placed directly on the ground, there is an automatic The problem of deformation caused by the release mechanism being in contact with the ground.

In addition, in the drawer type circuit breaker of the prior art in the above manner, when the circuit breaker body is pulled out from the extraction frame and directly placed on the ground, the automatic energy release mechanism is in contact with the ground and cannot perform the energy storage operation, so there is an overhaul. Time becomes a problem that hinders.

The present invention has been made in order to solve the above problems, and an object of the present invention is to obtain a drawer type circuit breaker which is not deformed by an automatic release mechanism even when directly placed on the ground when the circuit breaker body is withdrawn from the extraction frame. The energy storage closed-circuit spring can be automatically released.

The drawer type circuit breaker of the present invention is provided with: a circuit breaker body; a drawing frame for accommodating the circuit breaker body; a drawing device for extracting the circuit breaker body from the extraction frame; and a closed circuit spring for storing energy to make the circuit breaker open The opening and closing contact of the main body becomes a closed circuit; and the extraction detecting device is disposed outside or on the outer side of the side surface of the circuit breaker body, and the closed circuit spring is released according to the extracted state of the circuit breaker body.

According to the present invention, since the extraction detecting means for detecting that the circuit breaker body is extracted from the drawing frame and the energy storage closed-circuit spring is automatically released, is provided on the side or the upper side of the circuit breaker body, so that the circuit breaker body is withdrawn After that, even if placed directly on the ground, there will be no deformation of the automatic release mechanism.

Embodiment 1.

1 is a perspective view of a drawer type circuit breaker according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view showing a portion of the extraction frame cut away from the extraction frame, and FIG. 3 is a circuit breaker body. Inserting the extraction frame into the extraction frame cuts a part of the oblique view. Fig. 4 is a cross-sectional view showing the mechanism of the inside of the extraction mechanism in the AA section of Fig. 3, and Fig. 5 is a diagram showing the release of the closed circuit spring. Side sectional view of the state, Fig. 6 is a side cross-sectional view showing the OFF state of the energy storage completion, Fig. 7 is a side sectional view showing the ON state, Fig. 8 is a front view of the spindle, and Fig. 9 is a view showing the third Fig. 10 is a side cross-sectional view showing the automatic release mechanism of the closed-circuit spring at a position corresponding to Fig. 1 in a side cross-sectional view of the automatic release mechanism of the closed-circuit spring at a position corresponding to the first embodiment.

In Fig. 1, the drawer type circuit breaker 300 is composed of the following components: a circuit breaker body 100 for opening and closing a circuit, and a drawing frame 200 for accommodating the circuit breaker body 100 in an extractable manner. The circuit breaker body 100 is covered by a frame body 1 which is formed by a molded case 1a and a molded cover 1b. A drawing mechanism 15 is provided at a lower portion of the frame body 1 for the circuit breaker body 100. It is extracted from the extraction frame 200. The front side of the casing 1 is provided with an ON button 11 for making the movable contact 43 in FIG. 5 a closed circuit and causing the energy storage arm 24 to operate; and the OFF button 12 for pulling apart the movable contact 43 The trip latch 31 operates; and the handlebar 13 manually stores the closed loop spring 17 with energy. Further, the "extraction device" described in the patent application scope corresponds to the extraction mechanism 15.

An insertion hole 14 is provided in the front surface of the extraction mechanism 15 for inserting the extraction handle 204 (Fig. 4) used when the circuit breaker body 100 is withdrawn.

The extraction frame 200 is provided with a retractable extraction rail 201 having a circuit breaker body 100 attached to one end thereof, and a position detecting rail 202 mounted inside the side surface of the extraction frame 200.

When the circuit breaker main body 100 is inserted into the drawing frame 200 to a predetermined position from the pulled-out state shown in FIG. 1, as shown in FIG. 4, it is provided in the spiral portion 15a (which is provided inside the drawing mechanism 15). The male screw portion 15a1 at the distal end abuts against the insertion screw 203 provided in the extraction frame 200. Then, when the extraction handle 204 is inserted from the insertion hole 14, the front end of the extraction handle 204 is engaged with the spiral portion 15a. In this state, when the extraction handle 204 is rotated in the clockwise direction (C direction), the male screw portion 15a1 is rotated inside the insertion screw 203 and inserted, so that the circuit breaker body 100 is as shown in FIG. Will be inserted into the extraction box 200. Generally, the breaker body 100 is used in a state of being inserted into the extraction frame 200.

When the circuit breaker main body 100 needs to be withdrawn from the extraction frame 200 due to the maintenance of the circuit breaker main body 100 or the like, the extraction hand inserted from the insertion hole 14 is inserted from the insertion state of the circuit breaker main body 100 shown in FIG. Rotate 204 toward the counterclockwise direction (B direction) in Fig. 4. By this rotation, the male screw portion 15a1 is pulled out from the insertion screw 203. Therefore, the circuit breaker main body 100 is moved in the direction of the arrow E from the state of Fig. 3, and is extracted from the extraction frame 200 to a predetermined position. Then, when the circuit breaker main body 100 is further pulled out from the extraction frame 200 in the E direction, the extracted state shown in Fig. 1 is obtained.

Next, the opening and closing mechanism of the breaker body 100 will be described.

In Figs. 5 to 7, the frame 1 is composed of a molded case 1a and a molded cover 1b. The camshaft 21 is rotatably supported by the frame 1 by the frame 16 (shown in Fig. 2). An energy storage cam 22 and a ratchet 23 are fixed to the cam shaft 21 as an axial center, and a cam side roller 22a is provided between the energy storage cam 22 and the ratchet 23, and the outer circumference of the energy storage cam 22 is a circumferential cam surface 22b. .

Above the energy storage cam 22, there is an energy storage arm 24 that rotates with the fixed shaft 24a as a fulcrum. At one end of the energy storage arm 24, an arm side roller 24b is provided, by which the circumferential cam surface 22b of the energy storage cam 22 is transferred. And the energy storage cam 22 is rotationally driven together with the energy storage arm 24 with the fixed shaft 24a as a fulcrum. An operation surface 24c is formed on the upper surface of the abdomen of the energy storage arm 24, and as shown in Figs. 5 to 7, the curvature radius is changed to the right of the figure. A spring hooking pin 24d is provided at the other end of the energy storage arm 24.

On the right side of the energy storage cam 22, a guide plate 18 for holding the closed spring 17 is fixed to the frame 1, and the guide plate 18 has a long hole 18a. The long hole 18a penetrates the spring hook pin 24d so as to be movable along the long hole 18a, and moves along the long hole 18a to store the closed spring 17.

A first closing latch 25 is rotatably attached to the fixed shaft 24a, and is rotatably attached to the fixed shaft 24a, has a latch side roller 25a in the middle abdomen, and is formed with two active surfaces continuous to the end surface on one end side. The active surface can abut against the cam side roller 22a. One of the acting faces is a restricting surface extending in the up-and-down direction of the right end of the first closing latch 25 in FIG. 5, and is used to restrict the accumulating cam 22 in the counterclockwise direction when the cam-side roller 22a abuts against the face. Further rotation. The other of the active faces is an allowable face extending from the lower end of the above-mentioned restricting surface to the lower obliquely downward direction in Fig. 5. When the cam-side roller 22a abuts on the face, the accumulating cam 22 is allowed to face counterclockwise Rotation. Further, when energy is stored at the beginning of the closed spring 17, the cam side roller 22a is engaged with the allowable surface as shown in Fig. 5.

A second closing latch 26 that rotates about the fixed shaft 26a is provided substantially above the first closing latch 25, and has a side protruding portion at the lower end of the second closing latch 26 and is engaged with the side protruding portion. The segment-shaped engaging portion of the latch side roller 25a and the upper end portion of the second closing latch 26 are engaged with a closing bar 27 having a D-cut shape.

Further, the second closing latch 26 receives the force in the counterclockwise direction in FIG. 5 by a return spring (not shown). The closing lever 27 is turned on by the ON button 11 by a manual or an electromagnet or the like (rotating clockwise). Further, the "manual opening and closing mechanism" described in the patent application scope corresponds to the closing bar 27.

The main shaft 28 is rotatably supported by the frame 1. As shown in Fig. 8, three insulating connecting arms 28a are fixed to the main shaft 28 at equal intervals, and three insulating portions 41 are connected to each other by pins 42.

In addition, the second connecting arm 28b having the same shape as the insulating connecting arm 28a is fixed to the main shaft 28 at the same angle as the insulating connecting arm 28a.

The closed toggle link mechanism 29 is configured by connecting two links of the first link 29a and the second link 29b by the center pin 29d, and the second link 29b side is coupled to the second connecting arm 28b by the pin 29c. .

A link side roller 29e that is rotatably supported is provided around the center pin 29d. When the closed toggle link mechanism 29 is in a bent state, it is in a positional relationship of the contact surface 24c.

A first link that is rotatably supported by the connecting link 30 on the fixed shaft 30a is provided above the closed toggle link mechanism 29, and a closed link toggle link mechanism 29 is coupled to the one end side by a pin 30b. 29a side. A link side roller 30c that is rotatable is provided in the abdomen of the connecting link 30, and a left side of the link side roller 30c of Fig. 5 is provided to rotatably support the trip on the fixed shaft 26a. Latch 31. The side portion of the trip latch 31 is engaged with the link side roller 30c, and the upper end portion thereof is engaged with the trip bar 32 having a part of a D-cut shape, and is applied by a return spring (not shown) in FIG. Rotating force in a clockwise direction. The trip bar 32 is tripped by a manual or electromagnet using the OFF button 12 (rotating in a counterclockwise direction).

Next, the energy storage operation and the contact closed circuit operation of the closed spring 17 will be described. In the trip state of the fifth diagram of the release spring 17 release, the handle 13 is pressed in the direction of the arrow D by manual operation to rotate the ratchet 23 in the counterclockwise direction, and is fixed by the cam shaft 21 When the coaxial energy storage cam 22 rotates in the counterclockwise direction, since the arm side roller 24b supported at the left end of the energy storage arm rotates along its circumferential cam surface 22b, the arm side roller 24b moves to the fifth figure. On the left side, as a result, the accumulator arm 24 rotates clockwise about the fixed shaft 24a, and the spring hook pin 24d provided at the other end moves to the lower side in Fig. 5 to store the closed spring 17.

On the other hand, since the second closing lever 26 receives the counterclockwise force by a return spring (not shown), the side protrusion of the lower end of the second closing latch 26 abuts against the latch side roller 25a, and the side is protruded. The portion is pushed to the right in the fifth drawing, and the first closing latch 25 is rotated in the clockwise direction. However, since the one end side of the first closing latch 25 is in contact with the cam side roller 22a, that is, the allowable surface is in contact with the cam side roller 22a. Therefore, the cam side roller 22a serves as a blocking portion, and the first closing latch 25 is kept in a state in which it cannot be rotated.

The energy storage operation of the closed spring 17 is continued. When the energy storage cam 22 is further rotated in the counterclockwise direction, the cam side roller 22a is separated from the lower side of the first closing latch 25, that is, the allowable surface. At this time, the first closing latch 25 rotates clockwise, and the latch side roller 25a rotates clockwise, and the side protruding portion from the lower end of the second closing latch 26 is separated, so that the lower end of the second closing latch 26 becomes Free state.

In this manner, the second closing latch 26 is rotated in the counterclockwise direction by the return spring, and when the upper end of the second closing latch 26 passes over the closing bar 27 and moves toward the left of the closing bar 27, the first closing latch 25 The latch side roller 25a is engaged with the engaging portion of the lower end of the second closing latch 26 to stop the operation of the second closing latch 26.

At this time, the end portion of the second closing latch 26 has a stopper function, and the closing rod 27 is rotated in the counterclockwise direction by a return spring (not shown) to be in the second state (the state of the closing rod 27 in Fig. 6) even if The second closing latch 26 is biased by applying a clockwise rotational force to the second closing latch 26.

The energy storage operation of the closed-circuit spring 17 continues further, using the clockwise rotation of the energy storage arm 24 to move the operating surface 24c below the fifth figure, and the connecting rod from the closed-circuit toggle link mechanism 29. The side roller 29e is separated. By the bending force of the closed toggle link mechanism 29, the link side roller 29e follows the movement of the operation surface 24c downward, and the link on the left side in the fifth diagram of the closed toggle link mechanism 29 is pulled down. Therefore, the pin 30b at the other end of the closed toggle link mechanism 29 is moved downward, so that the link link 30 rotates in the counterclockwise direction, and the link side roller 30c also rotates in the counterclockwise direction.

As a result, the trip latch 31 is rotated in the clockwise direction by the return spring. When the trip latch 31 moves beyond the trip bar 32 to the right, the link side roller 30c is engaged with the recess of the trip latch 31 (FIG. 6), and the trip bar 32 is not shown. The return spring rotates clockwise, and even if a counterclockwise rotational force is applied to the trip latch 31, the trip latch 31 can be blocked.

Since the closed toggle link mechanism 29 does not bend beyond the predetermined bending state, it is in the state of Fig. 6. The energy storage cam 22 is rotated by approximately one turn by the pressing operation of the handle 13, and finally becomes the state of the sixth figure, that is, the arm side roller 24b of the energy storage arm 24 reaches the maximum of the energy storage cam 22. At a position slightly before the radius, the cam side roller 22a abuts again on the end surface (i.e., the restriction surface) of the first closing latch 25, and is in a stopped state.

Then, even if the handlebar 13 is further pressed, the ratchet wheel 23 is only idling, and the accumulating cam 22 does not rotate, and the energy storage of the closed-circuit spring 17 is completed.

In the state of Fig. 6, the closed spring 17 urges the spring hook pin 24d upward by the force of the release force, and applies the counterclockwise force to the energy storage arm 24. Since the force is transmitted to the energy storage cam 22 via the arm side roller 24b, the cam side roller 22a is urged in the counterclockwise direction to the end surface of the first closing latch 25 (that is, the restriction surface), and as a result, the first closing latch 25 is obtained. The latch side roller 25a presses the lower end engaging portion of the second closing latch 26 to the left side, and rotates the second closing latch 26 in the clockwise direction. However, the closing lever 27 is blocked at the upper end of the second closing latch 26. a portion for preventing the second closing latch 26 from rotating in a clockwise direction.

In this state, when the ON button 11 of Fig. 1 is pressed, the closing lever 27 is rotated in the clockwise direction to perform the ON operation, because the closing of the upper end of the second closing latch 26 is released by the closing lever 27, so the second The closing latch 26 is rotated in the clockwise direction to release the engagement of the lower end engaging portion and the latch side roller 25a.

As a result, the cam side roller 22a rotates the first closing latch 25 in the counterclockwise direction and rotates in the same direction, and the energy storage cam 22 also rotates in the same direction. Therefore, the arm side roller supported by the left end of the energy storage arm 24 is used. 24b will fall into the stepped portion of the circumferential cam surface 22b of the accumulating cam 22, and the energy-dissipating force of the closing spring 17 causes the accumulator arm 24 to rotate counterclockwise as shown in Fig. 7, and its operating surface 24c The link side roller 29e of the closed toggle link mechanism 29 pops up.

Therefore, the link on the left side of the closed toggle link mechanism 29 moves to the upper side, and the link link 30 rotates in the clockwise direction, but the link side roller 30c abuts on the trip latch 31, so the trip latch 31 is attached. Since the rotation of the counterclockwise direction is locked by the trip bar 32, the closed toggle link mechanism 29 is extended to the right, the second connecting arm 28b is rotated counterclockwise, and the movable contact 43 is moved to On the right side, it is in the state of Fig. 7, and the contacts 43a and 44a are turned ON.

In the state of Fig. 7, the closed toggle link mechanism 29 is pressed to the left by the urging force of the crimp spring 45, and a clockwise rotational force is applied to the link 30 via the pin 30b via the link The side roller 30c urges the trip latch 31 in the counterclockwise direction to prevent the trip latch 31 from rotating in the counterclockwise direction by the trip bar 32.

In this state, when the OFF button 12 of Fig. 1 is pressed, the trip bar 32 is rotated in the counterclockwise direction to perform the tripping operation because the trip latch 31 is rotated counterclockwise by the above-described force. Therefore, the link side roller 30c is disengaged from the recess of the trip latch 31, and the link link 30 is rotated in the clockwise direction. As a result, the pin 30b at the other end of the closed toggle link mechanism 29 is moved upward, and the closed toggle link mechanism 29 is bent. At this time, the link side roller 29e of the closed toggle link mechanism 29 moves to the left along the operation surface 24c of the energy storage arm 24, and the pin 29c drives the insulating link 41 to the left to move the movable contact 43 to On the left side, the contacts 43a and 44a are turned ON, and the state returns to the state of Fig. 5. Then, the above operations are repeated.

Next, an automatic release mechanism that automatically releases the closed-circuit spring 17 when the circuit breaker body 100 of the present invention is taken out from the extraction frame 200 will be described.

As shown in Fig. 2, the automatic release mechanism of the closed-circuit spring 17 includes a closing plate 56 that is fixed to the closing bar 27, and a pressing link 55 that is held slidable by the pin provided on the frame 16, And abutting on the closing plate 56 to rotate the closing plate 56; the shaft 53 is pivotally supported on the frame 16 and extends through the molding cover 1b; the linking plate 54 is fixed to one end of the shaft 53 by being rotated together with the shaft 53 The pressing link 55 is pressed; the track detecting link 51 is fixed to the other end of the shaft 53, and is rotatably provided on the side of the circuit breaker body 100; and the position detecting track 202 is provided in the drawing frame. On the inner side of the side of the 200, when the circuit breaker body 100 is withdrawn, the track detecting link 51 is rotated with the shaft 53 as an axis. Further, the "extraction detecting means" described in the patent application scope corresponds to the track detecting link 51.

Further, the upper link 55 is normally used (when the track detecting link 51 is not engaged with the position detecting track 202), and is stored in the direction of the linking plate 54 by the spring so as not to rotate the closing plate 56. can. Further, the interlocking plate 54 is stored by the energy storage spring 57 in the clockwise direction of the paper surface in such a manner as to resist the storage capacity of the upper link 55 and press the upper link 55.

Next, the action of the automatic release mechanism will be described. When the extraction handle 204 inserted from the insertion hole 14 in Fig. 4 is operated and the circuit breaker body 100 is withdrawn from the extraction frame 200, as shown in Fig. 9, the track detection link 51 is moved to the position detection track 202. Above. On the other hand, when the circuit breaker body 100 is pulled out from the extraction frame 200 to a predetermined position, since the track detecting link 51 is moved to the position where the position detecting track 202 is not present, as shown in FIG. 10, the track detecting link is as shown in FIG. The 51 series rotates clockwise with the shaft 53 as the axis.

When the track detecting link 51 is rotated in the clockwise direction, the interlocking plate 54 is similarly rotated clockwise via the shaft 53, and the abutting pressing link 55 is pushed upward. The upper pressing link 55 pushed to the upper side further pushes the abutting closing plate 56 upward, and the closing plate 56 is pivoted with the closing rod 27, and rotates clockwise together with the closing rod 27. In the same state as when the ON button 11 in FIG. 1 is pressed as described in the operation mechanism of the circuit breaker main body 100, the engagement between the closing bar 27 and the second closing latch 26 is released to cause the closed spring 17 to be closed. Release energy.

At this time, since the extraction handle 204 for operation is inserted into the insertion hole 14, the trip bar 32 is held in the counterclockwise direction by a link mechanism (not shown), and the OFF button is pressed and pressed. In the case where the state of 12 is the same, even in the case of the same state as when the ON button 11 of Fig. 1 is pressed, the movable contact 43 does not operate, and only when the closed spring 17 is released can be operated.

Then, the operation of extracting the handle 204 is continued, and after the extraction of the circuit breaker main body 100 is performed, the track detecting link 51 is maintained in the clockwise direction as shown in Fig. 10, so the closing bar 27 is closed. It is maintained in a state of being rotated in the clockwise direction, and is in a state in which the energy storage of the closed spring 17 is prohibited.

According to the present embodiment, since the circuit breaker main body 100 is extracted from the extraction frame 200, and the position detecting rail 202 for automatically releasing the energy-storing closed-circuit spring 17 is provided on the side surface of the circuit breaker main body 100, the extraction is performed from the slave. After the frame 200 is withdrawn from the circuit breaker body 100, even if placed directly on the ground, the deformation of the track detecting device is not included.

Further, since the closed-circuit spring 17 cannot store energy when the position detecting rail 202 is not detected, the closed-circuit spring cannot store energy when it is not inserted into the drawing frame, and therefore it is safe.

Further, the closing plate 56 fixed to the closing bar 27 is rotated by the rail detecting link 51 → the shaft 53 → the interlocking plate 54 → pressing the link 55, whereby the closing rod 27 is driven to release the closed spring 17, so After the closure rod 27 is closed, the existing mechanism can be used, and the automatic release mechanism can be installed after the local modification, and it is not necessary to return to the workshop for modification or replace each body, and the modification time can be shortened or the modification cost can be achieved. Cost reduction.

Further, a position detecting track 202 is provided in the drawing frame 200, and a track detecting link 51 is provided on the side of the circuit breaker body 100, and is disposed so as to be movable in the shape of the position detecting track 202 even in the state in which the closed-circuit spring 17 is stored. Because the closed circuit spring 17 performs the release of the circuit breaker body 100 when the circuit breaker body 100 is withdrawn from the extraction frame 200, the closed state spring 17 of the energy storage state can be accidentally released after the circuit breaker body 100 is taken out, thereby avoiding inspection and repair. A horror or accident such as a caregiver.

Further, since the circuit breaker main body 100 after the extraction is in the release state of the closed circuit spring 17, it is possible to prevent the person other than the inspection wearer from erroneously operating the handlebar 13 to cause the energy storage of the closed spring 17.

Further, in the present embodiment, the position detecting rail 202 constituting the automatic release mechanism is provided inside the side surface of the drawing frame 200. However, when it is provided on the inner side of the upper side of the drawing frame, the track detecting link 51 may be provided. Above the corresponding breaker body. Further, in the present embodiment, the track detecting link 51 is provided with the position detecting track 202 for detecting the extracted state of the circuit breaker main body 100. However, the track detecting link 51 may directly detect the drawing frame 200.

Embodiment 2.

In the first embodiment, the embodiment in which the circuit breaker main body 100 after the extraction is not possible to store the energy of the closed spring 17 is described. However, depending on the condition of the repair, it may be assumed that the circuit breaker main body 100 must be closed after the circuit breaker 100 is pulled out. The spring 17 stores energy.

In the second embodiment below, the closed spring 17 can be stored even after the extraction.

Figure 11 is a side cross-sectional view showing the automatic release mechanism of the closed-circuit spring at a position corresponding to Figure 3, and Figure 12 is a side cross-sectional view showing the automatic release mechanism of the closed-circuit spring, and showing the track-detecting link in the closed-spring Fig. 13 is a side cross-sectional view showing the automatic release mechanism of the closed-circuit spring at a position corresponding to Fig. 1 in a state in the vicinity of the position where the energy is released.

As shown in Fig. 11, the track detecting link 51 is disposed below the position detecting track 202, and the position detecting track 202 is provided with a convex portion 202a having a curved shape which is partially directed downward of the paper surface. Further, the interlocking plate 54 and the track detecting link 51 are stored in the counterclockwise direction of the paper surface by pushing the interlocking plate 54 downward to the upper pressing link 55. Since the other structure is the same as that of the first embodiment, the description thereof will be omitted. Further, the convex portion 202a may have another shape such as a semicircular shape, and the "extraction detecting portion" described in the patent application scope is the convex portion 202a.

At this time, when the handle 204 is inserted from the insertion hole 14 and the circuit breaker body 100 is withdrawn from the extraction frame 200, the track detection link 51 moves to the position detection track 202 as shown in FIG. under. When the breaker body 100 is drawn out from the extraction frame 200 to a predetermined position, the rail detecting link 51 abuts on the convex portion 202a of the curved shape or the semicircular shape of the position detecting rail 202, and detects the track 202 along the position. The shape is rotated clockwise with the shaft 53 as the axis.

As shown in Fig. 12, when the track detecting link 51 reaches the vicinity of the apex of the curved portion of the position detecting track 202 or the convex portion such as a semicircular shape and rotates clockwise, the mechanism is the same as that of the first embodiment described above. The interlocking spring 17 is released in the same manner as when the ON button 11 of Fig. 1 is pressed. At this time, the movable contact 43 does not operate, and is the same as that of only the closed-circuit spring 17 is released.

Then, the operation of extracting the handle 204 is continued, and when the extraction operation of the circuit breaker body 100 is continued, the track detecting link 51 is as shown in Fig. 13, because it is moved to the bending portion of the position detecting track 202. Or a convex portion such as a semicircular shape, so that it returns to the counterclockwise direction again, and the closing rod 27 returns to a state in which it can be rotated in the counterclockwise direction, so that it becomes a state in which the closed spring can be stored again.

According to the present embodiment, since the circuit breaker main body 100 is extracted from the extraction frame 200, and the position detecting rail 202 for automatically discharging the energy storage closed-circuit spring 17 is provided on the side surface of the circuit breaker main body 100, the detection is broken. After the body 100 is withdrawn from the extraction frame 200, even if it is placed directly on the ground, there is no possibility that the track detecting device is deformed.

Further, since the closed-circuit spring is released only when the position detecting rail is detected based on the shape of the convex portion of the position detecting rail 202, the position detecting is not detected even if the circuit breaker main body is lowered from the drawing frame 200 during inspection. The track, so the closed-circuit spring 17 can store energy and will not hinder the maintenance during maintenance.

Further, the closing plate 56 fixed to the closing bar 27 is rotated by the rail detecting link 51 → the shaft 53 → the interlocking plate 54 → pressing the link 55, whereby the closing rod 27 is driven to release the closed spring 17, so After the closure rod 27 is closed, the existing mechanism can be used. In addition, the automatic release mechanism can be installed after the local modification, and it is not necessary to return to the workshop for modification or replace each body, and the reduction time or the transformation cost can be achieved. Cost.

In addition, since the circuit breaker main body 100 after the extraction is in a state in which the closed-circuit spring 17 can be stored due to a test operation or the like, the inspection repairer can take out the circuit breaker main body 100 for inspection or the like, and then close the spring. 17 energy storage.

Further, in the first embodiment and the second embodiment described above, the mechanism of the position detecting rail 202 and the track detecting link 51 is provided on the side of the circuit breaker main body 100, but even if the mechanisms are arranged in the open circuit In the case of the upper surface of the main body 100, when the extracted circuit breaker body 100 is directly placed on the ground, the mechanism for the track detecting link 51 for automatically releasing the closed-circuit spring 17 is not deformed or the like. The points are the same as those described in the above embodiment.

1. . . framework

1a. . . Molded shell

1b. . . Molded cover

11. . . ON button

12. . . OFF button

13. . . Handle

15. . . Extraction mechanism

15a. . . Spiral part

15a1. . . Male screw

16. . . frame

17. . . Closed spring

18. . . Guide plate

18a. . . Long hole

twenty one. . . Camshaft

twenty two. . . Energy storage cam

22a. . . Cam side roller

22b. . . Circumferential cam surface

twenty three. . . ratchet

twenty four. . . Energy storage arm

24a, 26a. . . Fixed axis

24b. . . Arm side roller

24c. . . Action surface

24d. . . Spring hook pin

25. . . 1st closing latch

25a. . . Bolt side roller

26. . . 2nd closing latch

27. . . Closing rod

28. . . Spindle

28a. . . Insulated connecting arm

28b. . . Second link arm

29. . . Closed toggle joint mechanism

29a. . . First link

29b. . . Second link

29c, 30b. . . pin

29d. . . Center pin

29e. . . Connecting rod side roller

30. . . Connecting link

30c. . . Connecting rod side roller

31. . . Jump off the bolt

32. . . Jump off stick

41. . . Insulated connecting rod

43. . . Movable contact

43a, 44a. . . contact

44. . . conductor

45. . . Crimp spring

51. . . Track detection link

53. . . axis

54. . . Linkage board

55. . . Press the connecting rod

56. . . Closing plate

57. . . Energy storage spring

100. . . Circuit breaker body

200. . . Withdraw box

201. . . Pull out the track

202. . . Position detection track

203. . . Screw

202a. . . Convex

204. . . Pull out the handle

300. . . Drawer type circuit breaker

Fig. 1 is a perspective view showing a portion of the extraction frame cut away in a state in which the circuit breaker body of the drawer type circuit breaker of the present invention is withdrawn from the drawing frame.

Fig. 2 is a perspective view showing a state in which the mold cover of Fig. 1 is removed.

Fig. 3 is a perspective view showing a part of the extraction frame in a state in which the main body of the circuit breaker of Fig. 1 is inserted into the drawing frame.

Fig. 4 is a cross-sectional view showing the internal mechanism of the extracting mechanism taken along the line A-A of Fig. 3.

Fig. 5 is a side cross-sectional view showing a state in which the closed-circuit spring of the circuit breaker main body according to the first embodiment of the present invention is released.

Fig. 6 is a side cross-sectional view showing the OFF state after the completion of the energy storage of the closed-circuit spring of the circuit breaker main body according to the first embodiment of the present invention.

Figure 7 is a side cross-sectional view showing the ON state of the circuit breaker main body according to Embodiment 1 of the present invention.

Fig. 8 is a front view of the spindle of the first embodiment of the present invention.

Fig. 9 is a side cross-sectional view showing the automatic release mechanism of the closed-circuit spring at a position corresponding to the third embodiment in the first embodiment of the present invention.

Figure 10 is a side cross-sectional view showing the automatic release mechanism of the closed-circuit spring at a position corresponding to the first embodiment in the first embodiment of the present invention.

Figure 11 is a side cross-sectional view showing the automatic release mechanism of the closed-circuit spring at a position corresponding to the third embodiment in the second embodiment of the present invention.

Fig. 12 is a side cross-sectional view showing the automatic release mechanism of the closed circuit spring, showing a state in the vicinity of the position at which the track detecting link of the second embodiment of the present invention releases the closed spring.

Figure 13 is a side cross-sectional view showing the automatic release mechanism of the closed-circuit spring at a position corresponding to the first embodiment in the second embodiment of the present invention.

1. . . framework

1a. . . Molded shell

1b. . . Molded cover

11. . . ON button

12. . . OFF button

13. . . Handle

14. . . Insertion hole

15. . . Extraction mechanism

51. . . Track detection link

100. . . Circuit breaker body

200. . . Withdraw box

201. . . Pull out the track

202. . . Position detection track

300. . . Drawer type circuit breaker

Claims (6)

A drawer type circuit breaker is provided with: a circuit breaker body; a drawing frame for accommodating the circuit breaker body; a drawing device for extracting the circuit breaker body from the drawing frame; and a closed circuit spring for storing energy The opening and closing contact of the circuit breaker main body is closed; the extraction detecting device is disposed outside or above the side surface of the circuit breaker main body, and releases the closed circuit spring according to the extracted state of the circuit breaker main body; and corresponding to the extraction detecting device a position detecting track having a convex portion provided inside the drawing frame; and the extracted state is determined based on detection of the convex portion of the position detecting track by the extraction detecting device. The drawer type circuit breaker according to claim 1, wherein when the position detecting track is not detected by the extraction detecting means, the extracted state is determined. The drawer type circuit breaker according to claim 2, wherein the extraction detecting means releases the closed-circuit spring when the position detecting track is not detected, and prohibits energy storage. The drawer type circuit breaker according to claim 1, wherein the position detecting track has an extraction detecting unit, and when the extraction detecting unit detects the extraction detecting unit, the extracted state is determined. The drawer type circuit breaker according to claim 1, wherein the extraction detecting means allows the energy storage of the closed-circuit spring in the extracted state after detecting that the convex portion is released. The drawer type circuit breaker according to any one of claims 1 to 5, further comprising: a manual opening and closing mechanism that opens and closes the opening and closing contact by manual operation; and the extraction detecting device drives the manual opening and closing mechanism In order to release the above-mentioned closed-circuit spring or to prohibit the energy storage of the above-mentioned closed-circuit spring.