JP4484646B2 - Switchgear - Google Patents

Description

  The present invention relates to a switching device such as a circuit breaker, a switch, etc., and particularly relates to a mechanism for moving a movable contact to a fixed contact at a stable speed by releasing a closing spring.

  In a conventional switchgear, for example, a switchgear disclosed in Patent Document 1, the drive shaft (output gear or the like) and the operation link part (transmission gear or the like) are separated from the drive shaft side claw (engagement tooth) and the operation mechanism side. By providing a clutch (pressing protrusion) that separates the claw (engaging tooth) and separating the claw after the completion of spring accumulation, the drive shaft and the operating mechanism link part are separated to operate at a stable operation speed. Was configured.

Japanese Patent Laid-Open No. 11-40010

  However, in the configuration as disclosed in Patent Document 1, since the shape of the nail is complicated and difficult to process, and high accuracy is required, it has been an obstacle to the low-cost configuration. In addition, since a space for arranging these nails is also necessary, there is a problem in reducing the operation mechanism.

  The present invention has been made in order to solve the above-described problems. An opening / closing device having a tripping function that is not restrained and that allows a movable contact to be made a fixed contact at a stable speed by releasing a closing spring. It is something to be offered.

The opening / closing device according to the present invention includes an operation shaft rotatably supported by a support frame, an elastic lever fixedly held on the operation shaft, and an engagement spring that engages with the elastic lever rotated by the operation of the operation shaft. A link mechanism that stores energy and moves the movable contact to the fixed contact by releasing the closing spring, and displaces the elastic lever as the elastic lever rotates to disengage the elastic lever and the link mechanism. A link mechanism engaging / disengaging means for engaging the elastic lever rotating by the operation of the operating shaft and the link mechanism to rotate the link mechanism to store energy in the closing spring, and to store the link mechanism in case withdrawal means by displacing the resilient lever by disengaging the link mechanism from the resilient lever, the said movable contact in its disengaged state by releasing force of the closing spring Together capable of making operation to the constant contact is obtained by adapted to Pull the movable contact from the fixed contact in a state in which said link mechanism from the resilient lever is disengaged.

Further, the operating shaft rotatably supported on the support frame, the leaf spring lever fixedly held on the operating shaft, the leaf spring lever that rotates by the operation of the operating shaft is engaged and stored in the closing spring, A link mechanism that moves the movable contact to the fixed contact by releasing the closing spring, and the leaf spring lever is displaced with the rotation of the leaf spring lever to disengage the leaf spring lever from the link mechanism. A guide window provided on the support frame; engaging the leaf spring lever, which is rotated by operation of the operating shaft; and the link mechanism, rotating the link mechanism to store energy in the closing spring; by windows by displacing the plate spring lever to disengage the link mechanism from the plate spring lever, the elastically discharged by the closing operation of the movable contact to the fixed contact of the closing spring in its disengaged state Together to obtain, is obtained by adapted to Pull the movable contact from the fixed contact in a state in which said link mechanism from the plate spring lever is disengaged.

Further, the operation shaft rotatably supported on the support frame, the leaf spring lever fixedly held on the operation shaft, and the operation shaft engaged with the leaf spring lever rotated by the operation of the operation shaft are rotatably mounted. A tripping link, a guide link rotatably attached to one end of the tripping link and having a closing spring disposed on the outer periphery, one end connected to the elongated hole portion of the guide link so as to be rotatable and slidable, and a first link A closing link rotatably mounted on a fixed shaft, a connecting link having one end rotatably connected to a connecting portion between the guide link and the charging link, one end rotatably connected to the other end of the connecting link; An output lever rotatably mounted on the second fixed shaft, a trip latch that can be engaged with the trip link, and the leaf spring lever are displaced along with the rotation of the leaf spring lever. A guide window provided in the support frame that engages and disengages the lever and the tripping link, and rotates the tripping link by engaging the leaf spring lever that rotates by the operation of the operation shaft and the tripping link. And storing the spring in the closing spring and displacing the leaf spring lever by the guide window to disengage the tripping link from the leaf spring lever, thereby releasing the closing spring in the released state. The movable contact can be inserted into the fixed contact , and the movable contact can be detached from the fixed contact in a state in which the tripping link is detached from the leaf spring lever.

According to the opening / closing apparatus of the present invention, the elastic lever that rotates by operating the operation shaft and the link mechanism are engaged to rotate the link mechanism to accumulate energy in the closing spring, and the link mechanism engagement / disengagement means performs the elastic operation. By displacing the lever and detaching the link mechanism from the elastic lever, the movable contact can be inserted into the fixed contact by releasing the closing spring in the released state, and the link is released from the elastic lever. The movable contact can be detached from the fixed contact with the mechanism detached.

Further, the leaf spring lever that rotates by the operation of the operation shaft is engaged with the link mechanism, the link mechanism is rotated to store energy in the closing spring, and the leaf spring lever is displaced by the guide window to move the leaf spring lever. fixing the by disengaging the link mechanism, the can be the closing operation of the movable contact with the fixed contact by the release force of the closing spring in its disengaged state, in a state in which said link mechanism is disengaged from the plate spring lever The movable contact can be removed from the contact. Therefore, the opening / closing device can be provided at a relatively low cost.

Embodiment 1 FIG.
FIG. 8 is a diagram showing an opening reset state of the operating mechanism of the first switchgear to which the present invention can be applied by changing a part of the configuration. FIG. 9 is a view immediately before completion of closing spring accumulation of the operating mechanism of the opening / closing device, FIG. 10 is also a closing spring accumulation holding state, and FIG.

  In the figure, a tripping link 11 is fixedly held on a drive shaft (that is, an operation shaft) 10, and a guide link 14 having a closing spring 13 disposed on the outer periphery is rotatably connected to one end of the tripping link 11. Yes. Further, the insertion link 15 is rotatably and slidably connected to the elongated hole portion 14 a of the guide link 14, and the insertion link 15 is rotatably attached to the fixed shaft 30. Here, the tripping link 11, the guide link 14, and the closing link 15 form a first four-bar link.

  In addition, a connecting link 17 is rotatably connected to a connecting portion of the input link 15 to a connecting portion of the guide link 14 and the input link 15. The other end of the connection link 17 is rotatably connected to the output lever 18. Further, the output lever 18 is rotatably attached to the fixed shaft 31.

  The trip latch 12 is disposed so as to engage with and hold the notch 11a provided on the outer edge of the trip link 11 after the closing operation (FIGS. 9 to 11), and by an urging means (not shown). , Urging clockwise. The closing latch 16 is disposed so as to engage with a notch 15b provided on the outer edge of the closing link 15 in order to maintain the stored state of the closing spring 13, and is also rotated clockwise by biasing means (not shown). It is energized.

  Further, in an example of the opening / closing part in the opening / closing device, the drive lever 5 that contacts the output lever 18 is provided at one end of the drive shaft 3 that is rotatably supported, and is opened so as to urge the drive lever 5 counterclockwise. A stopper 6, which is provided with a spring 7 and restricts a separation distance between the fixed contact 1 and the movable contact 2, is disposed so as to contact the drive lever 5. The contact pressure spring 8 is disposed between the movable contact 2 and the lever 4 and applies a contact pressure required when the fixed contact 1 and the movable contact 2 come into contact with each other.

  Furthermore, a specific example of the opening / closing part in the opening / closing device is shown in FIG. The operation shaft 41 is operated, the link mechanism of the operation mechanism 21 is operated, the output lever 18 is operated, and the fixed contact of the vacuum switch 23 is made via the roller 22, the drive lever 5, the drive shaft 3, and the lever 4. Move and move the movable contact. In addition, 42 is a metal mechanical frame of the operation mechanism which is a support frame, 24 is a face plate, 8 is a contact pressure spring, and 25 is a fixed terminal connected to the fixed contact of the vacuum switch 23. A movable terminal 26 is connected to the movable contact of the vacuum switch 23 through a flexible conductor (not shown). Reference numeral 27 denotes an insulating frame for accommodating the vacuum switch 23, and 28 denotes an insulating cover.

  Next, the operation of the operation mechanism of the first opening / closing device will be described. FIG. 8 shows a reset state of the operation mechanism that releases the closing spring 13 in the open state of the opening / closing device. The first four-bar link including the trip link 11, the guide link 14, and the closing link 15 operates in conjunction with the trip link 11 rotated in the clockwise direction by rotating the drive shaft 10 in the clockwise direction. Is. In FIG. 8, the distal end portion (lower end portion in the drawing) of the guide link 14 is configured to contact the inner wall surface of the U-bending portion 15 a of the closing link 15. Here, the axis connecting the connecting portions at both ends of the guide link 14 with a straight line is shifted by L2 in the upper right direction in the figure with respect to the axis of the fixed shaft 30 that is the rotation center of the closing link 15. Therefore, when the drive shaft 10 is rotated clockwise, the guide link 14 slides on the inner wall surface of the U-bending portion 15a of the closing link 15 without rotating the closing link 15 counterclockwise. It moves substantially linearly with respect to the input link 15 in the downward direction. The connecting portion of the closing link 15 and the connecting link 17 moves along the elongated hole portion 14 a of the guide link 14 and compresses the closing spring 13.

  FIG. 9 shows a state in which the drive shaft 10 is rotated in the clockwise direction slightly in a state in which the closing spring 13 is being stored (accumulation is almost completed) rather than a state in which the closing spring 13 is most contracted (top dead center). FIG. When the axis connecting the connecting portions at both ends of the guide link 14 is deviated in the lower left direction by L 1 with respect to the center of the drive shaft 10, the trip link 11 rotates in a clockwise direction by the spring force of the closing spring 13. It rotates by receiving force. At this time, the outer peripheral projection 11b of the tripping link 11 and the end of the closing spring 13 come into contact with each other, so that the releasing link 11, the closing spring 13 and the guide link 14 are integrated, and the drive shaft 10 is the center of rotation in the clockwise direction. Rotation starts. Thereby, the long hole part 14a of the guide link 14 leaves | separates from the U bending part 15a of the making link 15 which was contacting so far. Subsequently, the dimension L <b> 2 formed by the deviation between the axis connecting the connecting portions at both ends of the guide link 14 with a straight line and the axis of the fixed shaft 30 gradually decreases. Further, when the axis connecting the connecting portions at both ends of the guide link 14 with a straight line exceeds the axis of the fixed shaft 30, the closing link 15 starts to move counterclockwise around the fixed shaft 30.

  Thereafter, as shown in FIG. 10, the spring accumulation holding state is achieved in which the notch 15 b provided on the outer edge of the closing link 15 and the closing latch 16 are engaged. At this time, a force that rotates in the clockwise direction is also exerted on the tripping link 11, but one end 11c of the tripping link 11 comes into contact with the stopper 20, and the rotation operation of the tripping link 11 in the clockwise direction is restricted. . Therefore, the four-bar link composed of the tripping link 11, the guide link 14, and the closing link 15 is held while maintaining a tension state.

  By moving the closing latch 16 counterclockwise from the state of FIG. 10, the engaging link 15 and the closing latch 16 are disengaged, and the rotational force proportional to the distance L2 by the spring force stored in the closing spring 13 is Join the input link 15. Then, the operation of the four-bar link composed of the closing link 15, the connecting link 17, and the output lever 18 proceeds, the drive lever 5 of the switchgear is pushed down, and the movable electrode 2 moves upward in the figure with the drive shaft 3 as a fulcrum. From the vicinity immediately before the completion of the series of operations, the dimension L1 formed by the deviation between the axis connecting the connecting portions at both ends of the guide link 14 and the center of the drive shaft 10 gradually decreases. Further, when the axis of the drive shaft 10 is exceeded, the rotational force applied to the tripping link 11 is reversed, and a rotational force that rotates counterclockwise is applied. As a result, the contact between the one end 11c of the tripping link 11 and the stopper 20 is released, and the tripping link 11 starts to rotate counterclockwise. At this time, the tripping latch 12 is rotated clockwise by a biasing means (not shown). It is rotating.

  Thereafter, as shown in FIG. 11, the cutout portion 11 a of the tripping link 11 and the tripping latch 12 are engaged and put in and held. That is, the load force of the opening / closing portion (the reaction force of the spring load of the contact pressure spring 8 and the release spring 7) is received by the output lever 18, and the second four-bar link comprising the closing link 15, the connecting link 17, and the output lever 18 is received. Thus, the force applied to the closing spring 13 can be attenuated and held by the initial load of the closing spring 13. Further, since the initial load of the closing spring 13 is attenuated by the first four-bar link comprising the closing link 15, the guide link 14, and the tripping link 11, the rotational force of the tripping link 11 is very small and the tripping latch. The load applied to 12 can be reduced.

  Thus, in the configuration, since the load force is attenuated by the two four-bar links and a large damping ratio is not required for each of the four-bar links, it is possible to provide an operating mechanism for the switchgear that is less affected by changes over time such as friction. . That is, since the load applied to the trip latch is set as the initial load of the closing spring, there is little variation in the tripping force, and the tripping force does not affect the fluctuation of the load force. The tripping operation is stable.

  In addition, when the number of components is large and the configuration becomes complicated, a great deal of labor is required for the assembly work. By using a closing link common to the two four-bar links, the operation mechanism of the switchgear is reduced. Obtained with a small number of parts.

  FIG. 13 is a diagram illustrating a state in the middle of storing the closing spring of the operating mechanism in the second opening / closing apparatus to which the present invention can be applied by changing a part of the configuration. As a modification of the first opening / closing device, the second opening / closing device does not incorporate the closing latch 16 in the operation mechanism.

  Next, the operation will be described. The process of accumulating the closing spring 13 is the same as that of the first opening / closing device, and is the state where the closing spring 13 is stored up to the position corresponding to FIG. 10 of the first opening / closing device. Here, since there is no closing latch 16, the closing operation is performed immediately after the closing spring accumulation without engaging the notch portion of the closing link 15 b, and the link moves to the position shown in FIG. 11 of the first opening / closing device, The input operation is completed.

  As described above, in the second opening / closing device, the charging spring is stored, that is, the closing operation. For example, in the case of manual operation, a single operation (one action) can be used. On the other hand, when the closing latch 16 is present, two operations are required: an operation for accumulating the closing spring 13 and an operation for releasing the engagement between the closing latch 16 and the closing link 15. The operation mechanism according to the application can be assembled only by the presence or absence of the closing latch 16.

  FIG. 14 is a diagram illustrating a reset state of the operation mechanism that releases the closing spring in the third opening / closing device. As a modification of the first opening / closing device, the third opening / closing device has a hole 17a of the connecting link 17 having a long hole shape. In the third opening / closing device, from the reset state in which the closing spring is released (corresponding to FIG. 8 of the first opening / closing device), the state in which the closing spring stores and holds energy (corresponding to FIG. 10 of the first opening / closing device). If the connecting portion of the connecting link 17 and the output lever 18 does not move to the position of the illustrated right end portion 17a ′ of the hole portion 17a, the output lever 18 does not rotate. That is, by making the hole 17a of the connecting link 17 into a long hole shape, the output lever 18 can be prevented from rotating unnecessarily while the closing spring 13 is stored. FIG. 15 is a diagram in the case where a long hole-shaped hole 18a is provided on the output lever 18 side as an alternative to the hole 17a of the connecting link 17, and the output lever 18 is unnecessary as in the case of FIG. Rotation can be suppressed.

  FIG. 16 shows a modified example of FIG. 14 in which one end of the drive shaft 3 of the opening / closing device is attached at the position of the rotary shaft 31 of the output lever, so that the rotational drive force of the operating mechanism is directly transmitted to the drive shaft 3. It is an example. Various power transmission methods can be configured according to the configuration of the switchgear. Also here, by making the hole 17a of the connecting link 17 into a long hole shape, the output lever 18 can be prevented from rotating unnecessarily while the closing spring 13 is stored.

  As described above, in the third opening / closing device, by providing the connecting link 17 or the output lever 18 with the elongated hole, unnecessary rotation of the output lever 18 while the closing spring 13 is stored can be suppressed. When the power transmission method between the opening / closing unit and the operation mechanism unit is restricted due to the dimensions in configuring the opening / closing device, the degree of freedom to arrange the operation mechanism with respect to the opening / closing unit is widened, and the opening / closing device is configured. The convenience above is improved.

  FIG. 1 is a diagram showing an opening reset state in the switchgear according to Embodiment 1 of the present invention. The present invention is applied by changing a part of the configuration of the first switchgear shown in FIGS. It is. Fig.1 (a) is front sectional drawing, has shown the opening-closing part notionally, and respond | corresponds to FIG. FIG. 1B is a side sectional view of FIG. FIG. 1C is a top view of FIG. In the figure, the same reference numerals as those of the first to third switching devices described above denote the same or corresponding parts, and a part of the description will be omitted. The same shall apply hereinafter.

  In the drawing, a drive shaft, that is, an operation shaft 41 is rotatably supported by a support frame 42 that supports an operation mechanism of the opening / closing device, and can be rotated by a handle (not shown) attached to the outside of the support frame 42. . The leaf spring lever 43 is substantially U-shaped and has two strips facing each other. The leaf spring lever 43 is fixedly held on the operation shaft 41 at its closed end 43a and rotates together with the rotation of the operation shaft 41. The tripping link 44 is substantially U-shaped with the U-shaped leaf spring lever 43 sandwiched inside, and is rotatably mounted on the operating shaft 41. The notch portion 44a and the outer peripheral projection portion 44b each have a first opening / closing device. This corresponds to the notch 11a and the outer peripheral projection 11b of the tripping link 11. Engagement protrusions 44d that protrude toward the inner leaf spring lever 43 are provided on both pieces of one end 44c of the tear-off link 44 (the end opposite to the notch 44a). Both pieces of the open end 43b of the U-shaped leaf spring lever 43 are respectively provided with engagement holes 43c that can engage with the engagement protrusions 44d. When the opening of the contact of the switchgear is reset, the leaf spring lever The engagement hole 43c of 43 and the engagement protrusion 44d of the tear-off link 44 can be engaged, and the rotation of the leaf spring lever 43 can be transmitted to the tear-off link 44. Note that both pieces of the open end 43b of the U-shaped leaf spring lever 43 are provided with bent portions 43d in which both end portions are bent inward.

  The support frame 42 is provided with a guide window 45 that can reduce the width (distance) between both pieces of the U-shaped leaf spring lever 43, and the engagement between the engagement hole 43 c of the leaf spring lever 43 and the tripping link 44. The engagement with the mating protrusion 44d can be released (removed) by reducing the width between both pieces of the U-shaped leaf spring lever 43. The guide window 45 is formed by piercing the support frame 42, and as shown in FIG. 1 (b), the guide window 45 is formed from a lower wide portion 45a, an upper narrow portion 45b, and an intermediate inclined portion 45c. It is made up. A stopper 20 (see FIG. 3) provided on the guide window 45 prevents the tripping link 44 from rotating in the clockwise direction. The trip latch 12 is rotatably attached to the support frame 42 and is urged clockwise by urging means (not shown). The closing latch 16 is rotatably mounted on the support frame 42 and is urged clockwise by urging means (not shown). The fixed shaft 30 and the fixed shaft 31 are rotatably supported by the support frame 42.

  Next, the operation of the operating mechanism of the switchgear will be described. In the first opening / closing device (FIG. 8), when the drive shaft (operation shaft) 10 is rotated, the tripping link 11 fixedly held by the drive shaft 10 is also rotated. However, in the opening / closing device in FIG. Then, the leaf spring lever 43 fixed and held by the rotation rotates, and the rotation is transmitted to the tripping link 44 engaged with the leaf spring lever 43 so that the tripping link 44 rotates.

  FIG. 1 shows a reset state of the operating mechanism that releases the closing spring 13 in an open state of the switchgear. FIG. 2 is an explanatory view showing the positional relationship between the leaf spring lever 43, the tripping link 44, and the guide window 45 in a stepwise manner from the released state of the closing spring 13 to the stored energy state. In the reset state of the operating mechanism that releases the closing spring 13 of FIG. 1 (FIG. 2A), the engagement hole 43c of the leaf spring lever 43 and the engagement protrusion 44d of the tripping link 44 are engaged. When the operating shaft 41 is rotated clockwise by a handle or the like, the leaf spring lever 43 is also rotated, the tripping link 44 engaged therewith is also rotated clockwise, and the closing spring 13 is stored [FIG. 2 (b)]. The engagement hole 43c and the engagement projection 44d are engaged until the closing spring 13 slightly exceeds the most contracted state (top dead center), but the closing spring 13 is most contracted (top dead center). If it exceeds the point), a torque that rotates clockwise by the force of the closing spring 13 is applied to the tripping link 44, so that the tripping link 44 self-runs (rotates) and rotates until it comes into contact with the stopper 20.

  During this self-running, the open end 43b having the bent portions 43d of both pieces of the leaf spring lever 43 is contacted and guided by the inclined portion 45c and the small width portion 45b of the guide window 45, and the rotation reaches the final position. Accordingly, the widths of both the pieces of the leaf spring lever 43 are gradually reduced, and the engagement holes 43c and the engagement protrusions 44d are disengaged [just before the accumulation of energy in FIG. Is equivalent to FIG. 9], the width of both pieces of the leaf spring lever 43 is reduced until the engagement is completely disengaged (disengaged) in the final rotational position [FIG. The accumulated energy holding state and the state of the closing spring 13 correspond to FIG.

  The operation of the first four-bar link including the trip link 44 (corresponding to the trip link 11), the guide link 14, and the closing link 15 is shown in FIG. ~ Same as described in FIG. Then, the spring force stored in the closing spring 13 is applied to the closing link 15 by moving the closing latch 16 counterclockwise. Then, the operation of the four-bar link composed of the closing link 15, the connecting link 17, and the output lever 18 proceeds in the same manner as described in FIG. 11, and the contact is closed. Thereafter, as described with reference to FIG. 11, the cutout portion 44 a of the tear-off link 44 and the tear-off latch 12 are engaged and put into the held state.

  FIG. 3 is a view showing a contact holding and holding state (closed state) in the switchgear according to the first embodiment. FIG. 3A is a front sectional view conceptually showing the opening / closing portion, and corresponds to FIG. 11 of the first opening / closing device. FIG. 3B is a side sectional view of FIG. FIG. 3C is a top view of FIG. FIG. 4 is an explanatory view showing the positional relationship among the leaf spring lever 43, the tripping link 44, and the guide window 45 in a stepwise manner when an electrical trip (trip command) occurs in the closed state.

  In the closed holding state (closed state), the engagement between the engagement hole 43c of the leaf spring lever 43 and the engagement projection 44d of the tripping link 44 is held in a released (released) state (FIG. 4 ( a) State of FIG. If an electrical trip (trip command) occurs at this time, the trip latch 12 is released, and the trip link 44 is separated from the leaf spring lever 43 and the operation shaft 41 in a counterclockwise direction at a stable speed. To open the contact (FIGS. 4B to 4D). Thus, in the inserted and held state, the engagement between the engagement hole 43c of the leaf spring lever 43 and the engagement projection 44d of the tear-off link 44 is held in a released (released) state. Even if a manual trip (trip command) occurs, the trip link 44 can rotate at a stable speed and open the contact regardless of the leaf spring lever 43 and the operation shaft 41. FIG. 4 explains step by step when an electrical trip occurs in the closed state. However, FIG. 4 also shows a case where the trip latch 12 is manually released in the closed state. It operates in steps similar to that shown in.

  In this way, at the final rotation position [FIG. 2 (d)], the leaf spring lever 43 and the tripping link 44 are safely disengaged, and the operation mechanism portion and the leaf spring lever 43 / operation shaft 41 are completely disconnected. The leaf spring lever 43 and the operation shaft 41 are not related to the operation of the operation mechanism and the release operation. For this reason, since the operation shaft 41 does not rotate regardless of the closing operation and the pulling operation, the operation mechanism 41 is not transmitted to the operation shaft 41 even in the case of manual operation or mechanical operation, and the operation mechanism is stable. The operating speed can be secured. For this reason, it is possible to realize an opening / closing device having a tripping function that is not restrained and at a low speed with a relatively small number of parts at low cost and in a space-saving manner.

  For example, in the case where there is no separation mechanism, when the tripping operation occurs while holding the operation shaft 41, the rotation of the trip is restricted by the rotation of the operation shaft 41. There is a problem that the motor does not operate when the rotation speed of the motor is slow or when the operating shaft 41 is given a stronger force. Further, when an operation handle or the like is attached to the operation shaft 41, the handle also moves with the same rotation due to the rotation of the operation mechanism. Therefore, there is a dangerous problem that the hand is hit by the rotation of the handle. By using the mechanism, the above problem can be avoided and a space-saving cutting mechanism can be configured at low cost.

  Next, FIG. 5 shows the positional relationship between the leaf spring lever 43, the tripping link 44, and the guide window 45 in a stepwise manner when the leaf spring lever 43 is returned (reset) in the open state by electrical tripping. It is explanatory drawing shown. In the case of an open state by electrical tripping [FIG. 5 (a)], the tripping link 44 is in the position shown in FIG. 1, but the leaf spring lever 43 still remains in the position shown in FIG. is there. Therefore, the operating shaft 41 is rotated counterclockwise with a handle or the like, and the leaf spring lever 43 is rotated counterclockwise. Then, as shown in FIG. 5 (b), the open end 43 b of the leaf spring lever 43 comes into contact with the engagement protrusion 44 d of the tear-off link 44, but the bent portion provided at the open end 43 b of the leaf spring lever 43 is bent. The portion 43d smoothly passes over the engagement protrusion 44d (FIG. 5B) and further rotates counterclockwise (FIG. 5C), and the engagement hole 43c of the leaf spring lever 43 and the tripping link 44 are rotated. The engaging protrusions 44d are engaged to be in a reset state [FIG. 5 (d), FIG. 1]. Thus, the reset state can be entered.

  FIG. 6 shows the positional relationship between the leaf spring lever 43, the trip link 44, and the guide window 45 in a stepwise manner when an electrical trip (trip command) occurs during manual opening operation in the closed state. FIG. At the initial stage of manual opening operation in the closed state, as shown in FIG. 6A, the leaf spring lever 43 is held by reducing the width of both open end portions 43b thereof by the guide window 45, The trip link 44 is in a disengaged state, and the trip link 44 remains in the vicinity of the final position. When the operating shaft 41 is rotated counterclockwise from the initial stage of manual opening operation in this closed state, the leaf spring lever 43 is also rotated counterclockwise. At this time, the leaf spring lever 43 is guided by the guide window 45 and passes through the position of the tear-off link 44 without being engaged with the engagement protrusion 44d of the tear-off link 44 while reducing the width of both pieces. Go [Figure 6 (b)]. After passing through the position of the tripping link 44, the leaf spring lever 43 is released from contact with the guide window 45 [FIG. 6 (c)], the widths of both the pieces return to the original, and further rotate counterclockwise. [FIG. 6 (d)].

  At this time, when an electrical trip (trip command) occurs, the trip latch 12 is released, so that the trip link 44 quickly rotates counterclockwise. Then, the engagement projection 44d of the tripping link 44 and the bent portion 43d of both pieces of the open end 43b of the leaf spring lever 43 collide at the tripping speed of the tripping link 44 [FIG. 6 (e)]. Since both the pieces of the leaf spring lever 43 are bounced so as to reduce the width thereof, the widths of both the pieces of the leaf spring lever 43 are reduced [FIG. 6 (f)]. In a state where the widths of both pieces of the leaf spring lever 43 are reduced, the tripping link 44 passes the position of the leaf spring lever 43 [FIG. 6 (g)] and completes the electrical trip [FIG. 6 (h)]. ].

  In this way, even during the manual opening operation in the closed state, even if the leaf spring lever 43 has advanced counterclockwise before the tripping link 44 [FIG. If the command is generated, the electrical trip can be completed at a stable speed without the leaf spring lever 43 and the trip link 44 engaging. It should be noted that the spring constant of both pieces of the leaf spring lever 43 is such that when an electrical trip command is generated, when both pieces of the leaf spring lever 43 are bounced at the trip speed of the trip link 44, the leaf spring lever 43 The widths of the two pieces are reduced so that the leaf spring lever 43 and the tripping link 44 are not engaged.

As a result, the leaf spring lever 43 only needs to be a lever having elasticity, and accordingly, two short strips having little elasticity face each other and a compression spring is interposed therebetween to guide the window 45. In this case, the distance between the two short belt-like materials may be displaced.
Further, the guide window 45 provided in the support frame 42, that is, the link mechanism engagement / disengagement means does not need to be provided in the support frame 42, and the elastic lever 43 is displaced by the rotation of the elastic lever (leaf spring lever) 43, thereby Any guide that engages and disengages the lever 43 and the link mechanism may be used.

Embodiment 2. FIG.
In the first embodiment, the present invention is applied by changing a part of the configuration of the first switchgear. However, the configurations of the second switchgear and the part of the third switchgear described above are similarly changed. Needless to say, the present invention can be applied.
Further, the link mechanism that makes the movable contact into the fixed contact by releasing the making spring may interpose the cam mechanism in the process of making the making operation.

  FIG. 7 is a view for explaining the configuration of the leaf spring lever and the tripping link according to the second embodiment. In the first embodiment, the engagement is performed by the engagement hole 43c of the leaf spring lever 43 and the engagement projection 44d of the tear-off link 44. However, as shown in FIG. The leaf spring lever 431 and the tear-off link 441 may be engaged and disengaged by providing the engagement protrusion 431c on the shaft 431 and the engagement hole 441d on the tear-off link 441. At this time, a corner notch portion 441e is provided at a portion of the side end portion of the tripping link 441 that contacts the engagement protrusion 431c of the leaf spring lever 431, and the side end portion of the tripping link 441 and the leaf spring lever 431 are arranged. When the engagement protrusion 431c comes into contact, the leaf spring lever 431 may be pulled off smoothly so that it can get over the link 441.

It is a figure which shows the opening reset state in the switchgear of Embodiment 1 of this invention. It is explanatory drawing which shows in stepwise the positional relationship of a leaf | plate spring lever, a tripping link, and a guide window from the releasing state of a closing spring to an accumulation holding state. FIG. 3 is a diagram illustrating a contact holding state (closed state) in the switchgear according to the first embodiment. It is explanatory drawing which shows stepwise about the positional relationship of a leaf | plate spring lever, a trip link, and a guide window about the case where an electrical trip generate | occur | produces in the case of a closing state. It is explanatory drawing which shows stepwise about the positional relationship of a leaf | plate spring lever, a trip link, and a guide window about the time of returning a leaf | plate spring lever in the case of an open state by electrical trip. It is explanatory drawing which shows stepwise about the positional relationship of a leaf | plate spring lever, a trip link, and a guide window, when an electrical trip generate | occur | produces in the middle of manual opening operation in the closing state. It is a figure explaining the structure of the leaf | plate spring lever of Embodiment 2, and a tripping link.

It is a figure which shows the opening reset state in the operation mechanism of the 1st switchgear which can apply this invention. It is a figure which shows the state just before completion | finish of closing spring energy storage in the operation mechanism of a 1st switchgear. It is a figure which shows the state of the making-up spring accumulation holding | maintenance in the operation mechanism of a 1st switchgear. It is a figure which shows the state of insertion holding | maintenance in the operation mechanism of a 1st switchgear. It is sectional drawing which shows a specific example of the opening / closing part of a 1st opening / closing apparatus. It is a figure which shows the state in the middle of the spring accumulation in the operating mechanism of the 2nd switchgear which can apply this invention. It is a figure which shows the opening reset state in the operation mechanism of the 3rd switchgear which can apply this invention. It is a figure which shows the modification of the opening reset state in the operation mechanism of a 3rd switchgear. It is a figure which shows the other modification of the opening reset state in the operation mechanism of a 3rd switchgear.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed contact 2 Movable contact 3 Drive shaft 4 Lever 5 Drive lever 6 Stopper 7 Release spring 8 Contact pressure spring 10 Drive shaft 11 Trip link 12 Trip latch 13 Feed spring 14 Guide link 15 Feed link 16 Feed latch 17 Connection link 18 Output lever 20 Stopper 21 Operating mechanism 22 Roller 23: Vacuum switch 24 Face plate 25 Fixed side terminal 26 Movable side terminal 27 Insulating frame 28 Insulating cover 30 to 31 Fixed shaft 41 Operating shaft 42 Support frame 43 Leaf spring lever 43a Closed end 43b Open end 43c Engagement hole 43d Bending part 44 Trip link 44a Notch 44b Outer peripheral projection 44c One end 44d Engagement projection 45 Guide window 45a Wide part 45b Small part 45c Inclined part 431 Leaf spring lever 431c Engagement Protrusion 44 The pull-off link 441d engaging hole 441e Sumiketsu part.

Claims (10)

Operation shaft supported rotatably on the support frame,
An elastic lever fixedly held on the operation shaft;
A link mechanism that engages with the elastic lever that rotates by operation of the operation shaft, stores energy in the closing spring, and releases the movable contact to the fixed contact by releasing the closing spring, and with rotation of the elastic lever A link mechanism engagement / disengagement means for displacing the elastic lever and disengaging the elastic lever and the link mechanism.
The elastic lever, which is rotated by the operation of the operating shaft, is engaged with the link mechanism, the link mechanism is rotated to accumulate energy in the closing spring, and the elastic lever is displaced by the link mechanism engaging / disengaging means. By detaching the link mechanism from the elastic lever,
The movable contact by releasing force of the closing spring with capable of making operation to the fixed contact in its disengaged state, may tripping the movable contact from the fixed contact in a state in which said link mechanism is disengaged from the resilient lever Opening and closing device. Operation shaft supported rotatably on the support frame,
An elastic lever fixedly held on the operation shaft;
A vacuum switch having a movable contact and a fixed contact,
A link mechanism that engages with the elastic lever that rotates by operation of the operation shaft, stores energy in the closing spring, and releases the movable contact of the vacuum switch to the fixed contact by releasing the closing spring, and the elastic lever A link mechanism engaging / disengaging means for displacing the elastic lever with the rotation of the elastic lever to disengage the elastic lever and the link mechanism;
The elastic lever, which is rotated by the operation of the operating shaft, is engaged with the link mechanism, the link mechanism is rotated to accumulate energy in the closing spring, and the elastic lever is displaced by the link mechanism engaging / disengaging means. By detaching the link mechanism from the elastic lever,
Together capable of making operation the moving contact of the vacuum switch to the fixed contact by the release force of the closing spring in its disengaged state, the pull-off the movable contact from the fixed contact in a state in which said link mechanism is disengaged from the resilient lever Opening and closing device that can be made.   The opening / closing apparatus according to claim 1 or 2, wherein the link mechanism engagement / disengagement means is a guide that displaces the elastic lever by the rotation of the elastic lever and engages / disengages the elastic lever and the link mechanism. Operation shaft supported rotatably on the support frame,
A spring lever fixedly held on the operating shaft,
A link mechanism that engages with the spring lever that rotates by operation of the operating shaft, stores energy in the closing spring, and releases the movable contact to the fixed contact by releasing the closing spring, and with rotation of the spring lever A guide window provided in the support frame for displacing the spring lever and engaging and releasing the spring lever and the link mechanism,
The spring lever rotated by the operation of the operating shaft and the link mechanism are engaged to rotate the link mechanism to store energy in the closing spring, and the spring lever is displaced by the guide window to displace the spring lever. By detaching the link mechanism from
The movable contact by releasing force of the closing spring with capable of making operation to the fixed contact in its disengaged state, may tripping the movable contact from the fixed contact in a state in which said link mechanism is disengaged from the spring lever Opening and closing device.   The opening / closing device according to claim 4, wherein the spring lever is a leaf spring lever.   6. The engagement between the leaf spring lever and the link mechanism is one in which an engagement hole is provided in one of them and an engagement protrusion is provided in a position corresponding to the engagement hole in the other. Switchgear.   The guide window provided in the support frame is a window composed of a wide portion, a narrow portion, and an inclined portion therebetween, and the leaf spring lever is substantially U-shaped, and both pieces of the open end portion thereof are Guided by the guide window, the width between the two pieces of the open end portion of the leaf spring lever is changed to disengage from the link mechanism disposed facing the leaf spring lever. The switchgear according to claim 5 or 6. The guide window provided in the support frame is a window composed of a wide portion, a narrow portion, and an inclined portion therebetween, and the leaf spring lever is substantially U-shaped, and both pieces of its open end are When the side end portions of the leaf spring levers come into contact with the inclined portion of the guide window, the leaf spring lever is guided to the guide window by the bent portion. The switchgear according to any one of claims 5 to 7, wherein the switchgear is configured as described above. If the middle manual opening operation in the fixed contact and the moving contact closed state, than the plate spring lever said link mechanism, when progressing rotated earlier, an electrical tripping command, said link The movable contact is moved from the fixed contact in a state in which the link mechanism is detached from the leaf spring lever without engaging the leaf spring lever and the link mechanism by repelling the leaf spring lever whose mechanism is advanced. The switchgear according to claim 5, wherein the switchgear can be pulled off. Operation shaft supported rotatably on the support frame,
A leaf spring lever fixedly held on the operating shaft,
A tripping link rotatably mounted on the operation shaft that engages with the leaf spring lever that rotates by operation of the operation shaft;
A guide link that is rotatably attached to one end of the tripping link and has a closing spring disposed on the outer periphery thereof, one end is rotatably and slidably connected to the elongated hole portion of the guide link, and is rotatable to the first fixed shaft Installed input link,
A connecting link having one end rotatably connected to a connecting portion between the guide link and the input link;
An output lever having one end rotatably connected to the other end of the connecting link and rotatably attached to the second fixed shaft;
A trip latch that can be engaged with the trip link, and a support frame that displaces the leaf spring lever as the leaf spring lever rotates and engages and disengages the leaf spring lever and the trip link. Equipped with a guide window,
The leaf spring lever, which is rotated by the operation of the operation shaft, is engaged with the tripping link, the tripping link is rotated to store energy in the closing spring, and the leaf spring lever is displaced by the guide window. By separating the tripping link from the leaf spring lever,
The movable contact by releasing force of the closing spring with capable of making operation to the fixed contact in its disengaged state, the pull-off the movable contact from the fixed contact in a state in which the pull-off link from the plate spring lever is disengaged Opening and closing device that can be made.

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