JP2015050125A - Opening/closing device operation mechanism and holding device of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing device operation mechanism that can suppress increase in size of a latch return spring, while reducing time required for an opening/closing device to be in a cut-off state from a turn-on state.SOLUTION: A holding device 1a of an opening/closing device operation mechanism includes: a latch 34 that engages with a latch lever 12 via a latch roller pin 12a; a trigger lever 31 that supports a trigger roller pin 31a in a rotatable state; a latch support part 32x that supports the latch 34 in a rotatable state around a latch rotation center shaft 34a; and an eccentric member 32 that rotates integrally with the trigger lever 31 around a trigger lever rotation center shaft 31b extending in parallel with the latch rotation center shaft 34a. The holding device 1a is arranged so as to extend and contract in a direction orthogonal to the latch rotation center shaft 34a, and includes a latch return spring 35 which is an extension coil spring for energizing the latch 34 that has been moved to a release side in a cut-off operation to an engaging side.

Description

  Embodiments of the present invention relate to an operation mechanism that can move a switchgear between an on state and a cut-off state by operating a movable contact in the switchgear that opens and closes an electric circuit.

  In a switching device that opens and closes an electric circuit, an operation mechanism that operates a movable contact (hereinafter simply referred to as a “switching device operating mechanism”) is known. Such a switchgear operating mechanism is required to cut off a high voltage current flowing through an electric circuit in a short time. For example, a so-called two-cycle cut-off performance that cuts off within two cycles of alternating current. Is required. In recent years, such switchgear operating mechanisms include an operation mechanism, which is a so-called “spring operating mechanism”, in which a movable contact is operated by a biasing force of a spring to move the switchgear between an on state and a shut-off state. It may be used (for example, refer to Patent Document 1).

  For example, the switchgear operating mechanism described in Patent Document 1 includes a “shutoff spring” that is a compression coil spring that biases a member that interlocks with the movable contact so that the movable contact moves in a direction in which the switchgear is in a shutoff state. Have. The opening / closing device operating mechanism includes a “sub shaft” that is a shaft that rotates in conjunction with the movement of the movable contact, and a lever that is fixed to the sub shaft and rotates about the central axis of rotation of the sub shaft. A “latch lever” is provided. When the movable contact is positioned at a position where the switchgear is turned on, a latch lever that rotates in conjunction with the movable contact against the compression load (biasing force) is applied to the latching spring that receives the compression load. Must be held at the corner position (hereinafter referred to as the “filling angle position”).

JP 2012-160308 A

  Such an opening / closing device operating mechanism is engaged via a latch lever and a latch roller pin as a device for holding the latch lever at a predetermined closing angle position (hereinafter simply referred to as “holding device”). And a trigger lever engaged with the latch via an eccentric member. The eccentric member rotates integrally with the trigger lever around the pivot axis of the trigger lever (hereinafter referred to as the trigger lever pivot center axis). Further, the eccentric member supports the latch so as to be rotatable, and a central axis of rotation of the latch (hereinafter referred to as a latch rotation central axis) is spaced a predetermined distance from the trigger lever rotation central axis. Extending in parallel. Furthermore, the holding device has a solenoid lever engaged with the trigger lever via a trigger roller pin, and the solenoid lever is driven by an electromagnetic solenoid actuator (hereinafter simply referred to as “electromagnetic solenoid”). Is done.

  In such a switchgear operating mechanism holding device, when performing an operation of operating the movable contact from a position where the switchgear is turned on to a position where the switchgear is cut off, a so-called shutoff operation, a trip current is passed through the electromagnetic solenoid to When the solenoid plunger pushes the solenoid lever and rotates the solenoid lever, the trigger roller pin is removed from the solenoid lever, and the engagement between the solenoid lever and the trigger lever is released. When the trigger lever and the eccentric member rotate, the latch engaged with the trigger roller pin moves in a direction away from the trigger roller pin (hereinafter referred to as “release side”), and the latch and the latch lever. Is disengaged. The latch lever rotates in a direction (hereinafter, simply referred to as “blocking side”) in which the switching device is switched from the on state to the disconnected state by the compression load of the blocking spring. In conjunction with the rotation of the latch lever, the movable contact is operated from the position where the switchgear is turned on to the position where it is shut off.

  In such an opening / closing device operating mechanism, when the blocking operation is started, the surface of the latch engaged with the latch roller pin (hereinafter referred to as an engagement surface) is formed by the blocking spring due to the compression load (biasing force). A relatively large force is received from the latch roller pin. For this reason, when the latch roller pin comes off from the engagement surface of the latch, the latch moves at a relatively high speed in a direction away from the latch roller pin (hereinafter referred to as a release side).

  In such an opening / closing device operating mechanism, in general, movement of the latch to the release side in the shut-off operation is performed by attaching the latch so that the latch returns to the side opposite to the release side (hereinafter referred to as the engagement side). It is limited by the biasing force of the latch return spring. In particular, in the switchgear operating mechanism described in Patent Document 1, a torsion coil spring is used as a latch return spring, and the movement of the latch toward the release side is caused by the urging force or moment of the torsion coil spring. Limited by force (torque).

  By the way, in the switchgear operating mechanism as described above, in order to reduce the time required for the switchgear to change from the on state to the shutoff state, it is conceivable to increase the spring constant of the shutoff spring. However, when the spring constant of the cutoff spring is made larger, it is necessary to increase the spring constant of the latch return spring accordingly. When the latch return spring is constituted by a “torsion coil spring” as in the opening / closing device operating mechanism of Patent Document 1, it is necessary to increase the thickness of the wire constituting the latch return spring. There arises a problem that the peripheral structure becomes large. In particular, there is a problem that the latch return spring becomes longer in the axial direction of the latch rotation central axis, and the holding device becomes larger in that direction.

  Therefore, an embodiment of the present invention aims to provide a switchgear operating mechanism that can suppress an increase in the size of the latch return spring while reducing the time required for the switchgear to change from the on state to the shutoff state. And

  In order to achieve the above-described object, the switchgear operating mechanism according to the embodiment of the present invention is a switchgear operation that can shift the switchgear between the on state and the shut-off state by operating the movable contact. A mechanism, which is provided so as to be rotatable with respect to the support structure, is provided so as to be rotatable with respect to the sub-shaft rotating in conjunction with the movement of the movable contact, and the support structure; The latch roller pin is rotatably supported around the rotation center axis of the latch roller pin, and the latch lever fixed to the sub shaft and rotated about the rotation axis of the sub shaft, and the opening / closing device are in a disconnected state. A shut-off spring that urges the latch lever toward a predetermined shut-off angle position so that the movable contact is located at a predetermined shut-off position, and a predetermined throw that the open / close device is turned on. A holding device that holds the latch lever at a predetermined closing angle position against a biasing force of the blocking spring so that the movable contact is positioned at a position, and the holding device has a closing angle when the latch lever is at a closing angle. The latch roller pin engages with the engagement surface when in position, the latch engages with the latch lever via the latch roller pin, and the trigger roller pin rotatably supports, and A trigger lever that rotates relative to the support structure; and a latch support that rotatably supports the latch about the latch rotation center axis, and extends parallel to the latch rotation center axis. An eccentric member that rotates integrally with the trigger lever about the trigger lever rotation center axis, and is configured to be rotatable with respect to the support structure driven by an electromagnetic solenoid; And a solenoid lever that restricts the trigger lever and the eccentric member from rotating to the release side by engaging with the trigger lever via the trigger roller pin, and the latch lever has a closing angle. The trigger lever rotation center axis is positioned on the sub shaft side from a plane including the latch roller pin rotation center axis and the latch rotation center axis when positioned at a position; In the shut-off operation in which the latch lever rotates from the closing angle position to the shut-off side, the solenoid lever is rotated by being driven by the electromagnetic solenoid, and the trigger roller pin is detached from the solenoid lever, and the trigger lever and When the eccentric member rotates to the release side, the latch is centered on the trigger lever rotation center axis. The latch pivots to the release side and pivots to the release side about the pivot center axis of the latch. The engagement between the latch and the latch lever is released, and the latch lever is turned on by the biasing force of the blocking spring. The holding device has a first end engaged with the latch and a second end engaged with the support structure. And a latch return spring that is a tension coil spring that is arranged to expand and contract in a direction orthogonal to the latch rotation center axis and biases the latch that has moved to the release side to the engagement side in the blocking operation. It is characterized by that.

  Further, the holding device of the switchgear operating mechanism according to the embodiment of the present invention can move the switchgear between the on state and the shut off state by operating the movable contact, and the support structure A sub-shaft that is rotatable with respect to the movement of the movable contact, and a rotation that is pivotable with respect to the support structure, and a latch roller pin about a rotation center axis of the latch roller pin A latch lever fixed to the sub-shaft and pivoting about a sub-shaft rotation center axis, and the movable contact located at a predetermined shut-off position where the switchgear is shut off. And a shut-off spring operating mechanism that biases the latch lever toward a predetermined shut-off angle position. A holding device for an opening / closing device operating mechanism that holds the latch lever at a predetermined closing angle position against a biasing force of the cutoff spring so that the movable contact is positioned, and when the latch lever is at the closing angle position The latch roller pin engages with an engagement surface, and a latch that engages with the latch lever via the latch roller pin and a trigger roller pin are rotatably supported, and with respect to the support structure A trigger lever that rotates and a latch support portion that supports the latch so as to be pivotable about a latch pivot center axis, and the trigger lever pivot that extends parallel to the latch pivot center axis An eccentric member that rotates integrally with the trigger lever about a central axis, an electromagnetic solenoid that is driven to rotate relative to the support structure, and A solenoid lever that restricts the trigger lever and the eccentric member from rotating to the release side by engaging with the trigger lever via a roller pin, and the latch lever is positioned at the closing angle position. The trigger lever pivoting central axis is positioned on the sub-shaft side with respect to a plane including the latch roller pin rotational central axis and the latch pivoting central axis, and the latch In the shut-off operation in which the lever rotates from the closing angle position to the shut-off side, the solenoid lever is rotated by being driven by the electromagnetic solenoid, and the trigger roller pin is detached from the solenoid lever so that the trigger lever and the eccentric member are By rotating to the release side, the latch rotates to the release side about the trigger lever rotation center axis. The latch pivots to the release side about the pivot axis of the latch that rotates, the engagement between the latch and the latch lever is released, and the latch lever is blocked from the closing angle position by the biasing force of the blocking spring. And the first end is engaged with the latch, the second end is engaged with the support structure, and the latch rotation center axis is It further includes a latch return spring that is a tension coil spring that is arranged to expand and contract in an orthogonal direction and biases the latch that has moved to the release side in the blocking operation toward the engagement side.

  According to the embodiment of the present invention, in order to shorten the time required for the switchgear from the turned-on state to the shut-off state, the “torsion coil spring” described above can be used even when a latch return spring having a large spring constant is used. As compared with the case of using “”, the latch return spring can be prevented from being enlarged in the axial direction of the latch rotation central axis.

It is a front view which shows the holding | maintenance apparatus of the switchgear operating mechanism of 1st Embodiment, and its periphery structure, and has shown the injection | throwing-in state of the switchgear. It is an expansion | deployment front view which shows the whole switchgear operating mechanism of 1st Embodiment, and has shown the interruption | blocking state of the switchgear. It is an expansion | deployment front view which shows the whole switchgear operating mechanism of 1st Embodiment, and has shown the injection | throwing-in state of the switchgear. It is a front view which shows a holding | maintenance apparatus among the opening / closing apparatus operating mechanisms of 1st Embodiment, and its periphery structure, and has shown the state from which a trigger roller pin remove | deviates from a solenoid lever at the time of the start of interruption | blocking operation | movement. It is a front view which shows a holding | maintenance apparatus among the opening / closing apparatus operating mechanisms of 1st Embodiment, and its periphery structure, and has shown the state which the latch contact | connected the stopper pin immediately after the start of interruption | blocking operation | movement. It is a front view which shows a holding | maintenance apparatus among the opening / closing apparatus operating mechanisms of 1st Embodiment, and its periphery structure, and has shown the state which a latch moves to a releasing side, contacting a stopper pin in the middle of interruption | blocking operation | movement. It is a front view which shows a holding | maintenance apparatus among the opening / closing device operating mechanisms of 1st Embodiment, and its periphery structure, A latch lever remove | deviates from a latch in the middle of interruption | blocking operation | movement, and a latch contacts a stopper surface formed in the latch base. The contact state is shown. It is a front view which shows a holding | maintenance apparatus among the opening / closing apparatus operating mechanisms of 1st Embodiment, and its periphery structure, and has shown the state which interruption | blocking operation was complete | finished. It is a front view which shows a holding | maintenance apparatus among the opening-and-closing apparatus operating mechanisms of 1st Embodiment, and its periphery structure, and shows the state which the cam lever and the latch lever are rotating in response to a closing cam immediately after starting a closing operation. ing. It is a front view which shows a holding | maintenance apparatus among the opening / closing device operating mechanisms of 1st Embodiment, and its periphery structure, and has shown the state which a latch lever starts engagement with a latch in the middle of closing operation | movement. It is a bottom view which shows a holding | maintenance apparatus and its periphery structure among the opening / closing device operating mechanisms of 1st Embodiment, and is the bottom view seen from the arrow Z direction of FIG. It is an enlarged view which shows the periphery structure of a trigger roller pin among the opening / closing apparatus operating mechanisms of 1st Embodiment, and has shown the state which the trigger roller pin and the solenoid lever are engaging. It is sectional drawing which shows the structure of the contact member contact | abutted with a trigger lever among the stop levers which comprise the opening / closing apparatus operating mechanism of 1st Embodiment. It is a front view which shows the holding | maintenance apparatus of the opening / closing apparatus operating mechanism of 2nd Embodiment, and its periphery structure, and has shown the state which the stop lever contact | abutted to the trigger lever.

[First Embodiment]
The configuration of the opening / closing device operating mechanism according to the first embodiment will be described with reference to FIGS. FIG. 1 is a front view showing the holding device of the opening / closing device operating mechanism of the present embodiment and the peripheral configuration thereof, and shows a state in which the opening / closing device is turned on. FIG. 2 is a developed front view showing the entire opening / closing device operating mechanism of the present embodiment, and shows a shut-off state of the opening / closing device. FIG. 3 is a developed front view showing the entire opening / closing device operating mechanism of the present embodiment, and shows a state in which the opening / closing device is turned on.

  As shown in FIGS. 2 and 3, the switchgear operating mechanism 1 of the present embodiment operates the movable contact 2 of the switchgear so as to shift the switchgear between the on state and the shut-off state. Is. The switchgear operating mechanism 1 is configured to be able to operate the movable contact 2 from a position where the switchgear is turned on (see FIG. 3) to a position where the switchgear is shut off (see FIG. 2). The operation at this time will be referred to as “blocking operation” in the following description. The switchgear operating mechanism 1 is configured to be able to operate the movable contact 2 from a position at which the switchgear is completely shut off to a position at which the switchgear is turned on. Will be referred to as “loading operation”.

  In the following description, a predetermined position of the movable contact 2 where the switchgear is turned on is simply referred to as a “closing position” (see FIG. 3). On the other hand, the position of the movable contact 2 at which the switching operation is completed and the switchgear is shut off is simply referred to as a “cutting position” (see FIG. 2). That is, the opening / closing device operating mechanism 1 can reciprocate between the closing position where the opening / closing device is turned on and the closing position where the opening / closing device is turned off by driving the movable contact 2. Yes.

  The direction in which the movable contact 2 moves from the closing position toward the blocking position will be referred to as “cutting side” below. The direction in which the movable contact 2 moves from the blocking position toward the closing position will be referred to as “loading side” below.

  The movable contact 2 is connected to the main lever 3 via a link mechanism 2a. The main lever 3 is configured to be rotatable with respect to the frame 5. The main lever 3 rotates in conjunction with the movement of the movable contact 2. When the main lever 3 is located at the angular position shown in FIG. 2, that is, when the movable contact 2 is located at the cutoff position, the switchgear operating mechanism 1 opens the electric circuit having the movable contact 2. Thus, the switchgear is configured to be in a cut-off state. 2, when the main lever 3 rotates and the movable contact 2 is located at a position away from the main lever 3, that is, at the closing position, the movable contact 2 is included. The electric circuit is closed and the switchgear is turned on.

  The frame 5 is a structure that is stationary while the shut-off operation or the closing operation is performed among the members constituting the switchgear operating mechanism 1, and constitutes the switchgear operating mechanism 1 such as the main lever 3. It is a structure that supports moving parts. Hereinafter, such a structure is referred to as a “support structure”. In the opening / closing device operating mechanism 1 of the present embodiment, the support structure includes a latch base 30, a lever base 45, a base 52, and the like, which will be described later, in addition to the frame 5.

  The frame 5 rotatably supports a shaft 4 (hereinafter referred to as a closing shaft) that rotates during the closing operation. The input shaft 4 is supported by the frame 5 via a bearing (not shown) fixed to the frame 5. The movable part engaged with the input shaft 4 will be described later. In the present embodiment, in the closing operation, the main lever 3 can be rotated around a rotation center axis 4a (hereinafter referred to as a closing shaft rotation center axis) 4a.

  The main lever 3 is not fixed to the input shaft 4 and is configured to be rotatable relative to the input shaft 4. The opening / closing device operating mechanism 1 is provided with a blocking spring 6 that expands and contracts according to the angular position of rotation of the main lever 3.

  The cutoff spring 6 is configured as a compression coil spring that mainly receives a compression load. One end of the cutoff spring 6 is fixed to the mounting surface 5 a of the frame 5, and the other end is engaged with the cutoff spring receiver 7. A force, i.e., a compressive load, is exerted between the cutoff spring receiver 7 and the frame 5 to cause the cutoff spring 6 to extend. A damper 8 in which a fluid is sealed and a piston 8 a slides is fixed to the cutoff spring receiver 7. A shut-off spring link 9 is coupled to the piston 8 a of the damper 8. The cutoff spring link 9 is connected to the main lever 3 via a pin 3a. As a result, the main lever 3 rotates in conjunction with the expansion and contraction of the blocking spring 6.

  The frame 5 supports the sub shaft 10 to be rotatable. One end portion of the sub lever 11 is fixed to the sub shaft 10, and the other end portion is connected to the main / sub connecting link 20 via the pin 11 a. The main / sub connecting link 20 is connected to the main lever 3 via a pin 3b. A rotation center axis (hereinafter referred to as a sub-shaft rotation center axis) 10c of the sub shaft 10 extends in parallel with the rotation center axis of the main lever 3, that is, the closing shaft rotation center axis 4a. The sub-lever 11 rotates about the sub-shaft rotation center axis 10 c in the opposite direction to the main lever 3 in conjunction with the rotation of the main lever 3. The sub shaft 10 rotates in the direction opposite to the main lever 3 in conjunction with the rotation of the main lever 3.

  A cam lever 13 is fixed to the sub shaft 10. One end of the cam lever 13 is fixed to the sub shaft 10, and the cam lever 13 rotates about the sub shaft rotation center axis 10c. The other end of the cam lever 13 rotatably supports the cam roller 13a. The cam lever 13 engages with the closing cam 25 via the cam roller 13a at the end of the closing operation and the shut-off operation. The making cam 25 is fixed to the making shaft 4 and rotates integrally with the making shaft 4 as indicated by an arrow N in the figure.

  In the closing operation, the closing shaft 4 is driven to rotate 180 degrees from the state where the blocking operation shown in FIG. 2 is completed by the compression load (biasing force) of the closing spring 21 which is a compression coil spring. Due to the biasing force of the closing spring 21, the closing cam 25 fixed to the closing shaft 4 causes the cam lever 13 and a member engaged therewith, that is, the sub shaft 10, the sub lever 11, the main lever 3, the movable contact 2, and the later-described. The latch lever 12 to be driven is driven. The closing shaft 4 does not rotate during the shut-off operation. Details of the input operation and the mechanism for performing the input operation will be described later.

  Further, a lever (hereinafter referred to as a latch lever) 12 that can be engaged with a latch 34 to be described later is fixed to the sub shaft 10. The latch lever 12 is configured to be rotatable with respect to the frame 5 about the sub-shaft rotation center axis 10c. The latch lever 12 is fixed to the sub-shaft 10 at one end, and rotatably supports a pin (hereinafter referred to as a latch roller pin) 12a via a bearing (not shown) at the other end. A rotation center axis 12c (hereinafter referred to as a latch roller pin rotation center axis) 12c of the latch roller pin 12a extends in parallel with the sub shaft rotation center axis 10c. The latch roller pin 12a has a substantially cylindrical shape with the latch roller pin rotation center shaft 12c as an axis. When the latch lever 12 rotates together with the sub shaft 10, the latch roller pin 12 a pivots on the side opposite to the arrow D around the sub shaft rotation center axis 10 c and engages with the latch 34. The latch lever 12 can be engaged with a later-described latch 34 via a latch roller pin 12a.

  In the following description, the direction in which the latch lever 12 rotates so as to move away from the latch 34 (that is, the direction in which the movable contact 2 moves from the closing position to the blocking position) will be referred to as “cutting side” (see FIG. 1 and arrow D shown in FIG. 3). The reverse direction of the “blocking side” will be referred to as “input side” below.

  In the switchgear operating mechanism 1 configured as described above, the latch lever 12 is engaged with the movable contact 2 via the sub shaft 10, the sub lever 11, the main / sub connecting link 20, the main lever 3, and the link mechanism 2a. Yes. The latch lever 12 rotates in conjunction with the movement of the movable contact 2. In addition, the latch lever 12 is engaged with one end of the cutoff spring 6 via the main lever 3, the cutoff spring link 9, the damper 8, and the cutoff spring receiver 7. The latch lever 12 rotates in conjunction with the expansion and contraction of the blocking spring 6.

  In the following description, the angular position of the latch lever 12 when the movable contact 2 is in the closing position is simply referred to as “closing angle position” (see FIGS. 1 and 3). On the other hand, the angular position of the latch lever 12 when the movable contact 2 is in the above-described interruption position is simply referred to as “interruption angle position” (see FIGS. 2 and 8).

  As the cutoff spring 6 extends, the movable contact 2 and the link mechanism 2a move from the closing position (see FIG. 3) toward the blocking position (see FIG. 2), and the latch lever 12 at the closing angle position moves to the arrow. As shown by D, it turns to the blocking angle position. That is, as the breaking spring 6 described above extends, the movable contact 2 moves to the breaking side and the latch lever 12 rotates to the breaking side.

  In the opening / closing device operating mechanism 1 described above, the cutoff spring 6 is configured as a compression spring that constantly receives a compression load. For this reason, the breaking spring 6 is positioned so that the movable contact 2 is located at a predetermined breaking position where the switchgear is cut off and the latch lever 12 is located at a predetermined breaking angle position by the compression load (biasing force). The member (shut-off spring receiver 7) interlocking with both the movement of the movable contact 2 and the rotation of the latch lever 12 is urged. The urging force of the cutoff spring 6 is transmitted to the movable contact 2 and the latch lever 12 via the cutoff spring link 9 and the main lever 3. In this way, the cutoff spring 6 biases the movable contact 2 to a predetermined cutoff position and biases the latch lever 12 to a predetermined cutoff angle position.

  In addition, as shown in FIG. 3, the opening / closing device operating mechanism 1 is configured so that the interrupting spring 6 resists a compressive load (biasing force) so that the movable contact 2 is located at the above-mentioned closing position, and the latch lever 12 is moved to a predetermined position. 1a (hereinafter simply referred to as “holding device”) 1a. Below, the holding | maintenance apparatus 1a of this embodiment and its periphery structure are demonstrated using FIG.1 and FIG.11. FIG. 1 is a front view showing a holding device and its peripheral configuration in the switchgear operating mechanism of the present embodiment, and FIG. 11 is a bottom view seen from the direction of arrow Z in FIG.

  The above-described cutoff spring 6 constantly urges the movable contact 2 to a predetermined cutoff position and urges the latch lever 12 to a predetermined cutoff angle position. The holding device 1a biases the latch lever 12 to a predetermined closing angle position against the biasing force of the cutoff spring 6 so that the movable contact 2 is positioned at a predetermined closing position.

  As shown in FIG. 1, the holding device 1 a is fixed to the latch 34 that is engaged with the latch lever 12, the eccentric member 32 that is a member that rotatably supports the latch 34, and the eccentric member 32. A trigger lever 31 that is a lever that is rotatable with respect to the structure, and a solenoid lever 36 that is a lever that is capable of restricting the rotation of the trigger lever 31 and the eccentric member 32 by engaging with the trigger lever 31. ing. Details of these configurations will be described below.

  The latch 34 has a surface (hereinafter referred to as an engagement surface) 34c that engages with the latch roller pin 12a when the latch lever 12 is in the closing angle position described above. As shown in FIG. 1, the engaging surface 34c engages with the latch roller pin 12a when the latch lever 12 is in the closing angle position. In the present embodiment, the engagement surface 34c has a planar shape. The latch 34 is rotatably supported by the eccentric member 32. The detailed configuration of the latch 34 and the peripheral configuration of the latch 34 will be described later.

  As shown in FIGS. 1 and 11, the eccentric member 32 includes a portion (hereinafter referred to as a latch support portion) 32 x that rotatably supports the latch 34, and a portion (hereinafter referred to as “rotation support”) that is rotatably supported by the support structure. (Referred to as a shaft portion) 32e. The shaft portion 32e and the latch support portion 32x are integrally coupled. A trigger lever 31 is coupled to an end of the shaft portion 32e opposite to the latch support portion 32x and the frame 5.

  As shown in FIG. 11, the eccentric member 32 has a shaft portion 32e having a columnar shape with a central axis 31b of the trigger lever 31 (hereinafter referred to as a trigger lever rotation central axis) 31b as an axis. . The eccentric member 32 rotates around the trigger lever rotation center axis 31b. On the other hand, the latch support portion 32x has a cylindrical shape with a pivot axis 34a (hereinafter referred to as a latch pivot center axis) 34a of the latch 34 as an axis. The latch 34 is rotatable about the latch support portion 32x of the eccentric member 32, that is, the latch rotation center axis 34a.

  As shown in FIG. 1, the trigger lever 31 rotatably supports the trigger roller pin 31a via a bearing (not shown). The trigger roller pin 31a has a substantially cylindrical shape with the central axis of rotation as the axis. When the trigger lever 31 rotates with respect to the frame 5, the trigger roller pin 31 a rotates about the trigger lever rotation center axis 31 b and engages with the solenoid lever 36. That is, the trigger lever 31 is engaged with the solenoid lever 36 via the trigger roller pin 31a.

  In the following description, the positions of the trigger lever 31 and the solenoid lever 36 when the solenoid lever 36 and the trigger roller pin 31a are engaged are referred to as “trigger engagement positions” in the following description (FIGS. 1 and 3). reference).

  The solenoid lever 36 is configured to be rotatable with respect to a lever base (support structure) 45 fixed to the frame 5. The solenoid lever 36 includes a portion (hereinafter referred to as an engaging portion) 36e extending from the central axis of rotation (hereinafter referred to as a solenoid lever rotation central axis) 36b toward the trigger roller pin 31a, and a solenoid. The lever rotation center shaft 36b extends to a later-described blocking electromagnetic solenoid 38 side, and has a portion (hereinafter referred to as a contact portion) 36c with which the plunger 38a of the electromagnetic solenoid 38 abuts. As shown in FIG. 1, the engaging portion 36e and the abutting portion 36c form a right angle in a cross section orthogonal to the solenoid lever rotation center shaft 36b. The trigger roller pin 31a is engaged with the engaging portion 36e.

  More specifically, as shown in FIG. 12, the engaging portion 36e of the solenoid lever 36 is formed with an engaging surface 36a that engages with the trigger roller pin 31a. The engagement surface 36a is a plane perpendicular to a straight line extending in the radial direction from the solenoid lever rotation center shaft 36b.

  The direction in which the trigger roller pin 31a of the trigger lever 31 in the trigger engagement position rotates so as to be separated from the engagement portion 36e of the solenoid lever 36 is hereinafter referred to as “release side” (see arrow C in the figure). . The “release side” is hereinafter referred to as “engagement side” in the opposite direction. Similarly, the direction in which the engagement portion 36e of the solenoid lever 36 at the trigger engagement position is separated from the trigger roller pin 31a is hereinafter referred to as “release side” (see arrow B in the figure). The direction opposite to the “release side” will be referred to as “engagement side” hereinafter.

  On the other hand, one end of a tension coil spring (hereinafter referred to as a solenoid lever return spring) 37 for returning the solenoid lever 36 to a predetermined trigger engagement position is coupled to the end of the contact portion 36c. The other end of the solenoid lever return spring 37 is coupled to the frame 5. In addition, the lever base 45 is formed with a surface (hereinafter referred to as a lever stopper surface) 45 a that can contact the contact portion 36 c of the solenoid lever 36. The lever stopper surface 45a restricts the solenoid lever 36 from rotating to the engagement side (the side opposite to the arrow B) from the trigger engagement position described above. As shown in FIG. 1, the solenoid lever return spring 37 urges the solenoid lever 36 toward the engagement side so that the contact portion 36c contacts the lever stopper surface 45a.

  The solenoid lever 36 is driven by an electromagnetic solenoid actuator (hereinafter simply referred to as “electromagnetic solenoid”) 38. The electromagnetic solenoid 38 is disposed such that its plunger 38a can engage with the contact portion 36c of the solenoid lever 36. The electromagnetic solenoid 38 receives a signal indicating a shut-off command from a control device (not shown), and the plunger 38a moves toward the contact portion 36c as indicated by an arrow A in the drawing and contacts the contact portion 36c. When the electromagnetic solenoid 38 rotates the solenoid lever 36 to the release side (indicated by an arrow B in the figure), the trigger roller pin 31a is detached from the solenoid lever 36.

  As shown in FIG. 1, the solenoid lever 36 has a trigger lever 31 via a trigger roller pin 31a when the plunger 38a of the electromagnetic solenoid 38 is not in contact with the contact portion 36c, that is, not driven by the electromagnetic solenoid 38. Engage with. As a result, the solenoid lever 36 can limit the rotation of the trigger lever 31 and the eccentric member 32 from the trigger engagement position described above to the release side (indicated by an arrow C in the drawing).

  In addition, in the holding device 1a, the trigger lever 31 further moves from the trigger engagement position to the engagement side as a mechanism for restricting the rotation of the trigger lever 31 to the engagement side (the side opposite to the arrow C in the drawing). A member that contacts the trigger lever 31 (hereinafter referred to as an abutting member) is provided. The contact member is a ring-shaped member 53 provided in the stop lever 50 in the present embodiment, and details thereof will be described below.

  The stop lever 50 is fitted into a pin 50 a fixed to the frame 5. The stop lever 50 is configured to be rotatable with respect to the frame 5 (support structure) around the pin 50a. The stop lever 50 has a ring-shaped member 53 as a contact member that contacts the trigger lever 31.

  As shown in FIG. 13, the ring-shaped member 53 is arranged so as to cover a cylindrical pin 53a fixed to the stop lever 50, an O-ring 53c arranged to surround the pin 53a, and the O-ring 53c. And a cover 53e. The cover 53e and the pin 53a of the stop lever 50 are made of metal, and these are integrally coupled.

  On the other hand, the O-ring 53c is made of a polymer material (polymer compound) such as an elastomer. Such materials include, for example, synthetic rubber having low resilience characteristics. The O ring 53c contracts when the trigger lever 31 comes into contact with the cover 53e, and returns to its original shape when the trigger lever 31 is separated from the cover 53e. That is, the O-ring 53c of the ring-shaped member 53 is configured as a portion that is elastically deformed (hereinafter referred to as an elastic deformation portion) when the trigger lever 31 comes into contact.

  The ring-shaped member 53 configured as described above can absorb and mitigate the impact acting between the trigger lever 31 and the stop lever 50. Note that the ring-shaped member 53 may be configured without the metal cover 53e.

  The stop lever 50 including the ring-shaped member 53 configured as described above adjusts the position of the contact member (ring-shaped member 53) that contacts the trigger lever 31 by rotating about the pin 50a. It is possible. The holding device 1a of the present embodiment has a mechanism (hereinafter simply referred to as “adjustment mechanism”) 1c that adjusts the position of the contact member (ring-shaped member 53), which will be described in detail below.

  The adjustment mechanism 1c supports a ring-shaped member 53 as a contact part, and is configured to be rotatable with respect to the frame 5 that is a support structure, and the rotation of the stop lever 50 Bolts (hereinafter referred to as adjustment bolts) 51 and nuts 51b and 51c for fixing the adjustment bolt 51 to a base 52 as a support structure. A pin 50 b for attaching the adjustment bolt 51 is fixed to the stop lever 50.

  The adjustment bolt 51 has a bolt head 51e in which a hole to be fitted to the pin 50b is formed, and a male screw portion 51a into which the nuts 51b and 51c are screwed. The bolt head 51e is fitted so as to be rotatable about the pin 50b of the stop lever 50. Thereby, the adjustment bolt 51 and the stop lever 50 are relatively rotatable.

  In the adjustment bolt 51, a male screw portion 51a is inserted into a through hole 52a formed in a base 52 that is a support structure. The adjusting bolt 51 is coupled to the base 52 by screwing nuts 51b, 51c on both sides of the base 52 with the male screw portion 51a. By changing the axial position where the adjustment bolt 51 is coupled to the base 52, the angular position of the rotation of the stop lever 50 that rotates relative to the frame 5 can be positioned. The position of the ring-shaped member (contact member) 53 to be supported can be adjusted.

  As a result, the adjustment mechanism 1 c can adjust the contact position of the ring-shaped member (contact member) 53. That is, the gap (hereinafter referred to as the initial gap) 31g (see FIG. 8) between the ring-shaped member 53 and the trigger lever 31 at the trigger engagement position can be adjusted. The contact position of the ring-shaped member 53 is contacted with the ring-shaped member 53 when the trigger lever 31 is further rotated from the trigger engagement position to the engagement side (opposite to the arrow C) by a slight angle. Is set as follows. In this way, the ring-shaped member 53 of the stop lever 50 restricts the rotation of the trigger lever 31 toward the engagement side.

  In the above-described embodiment, the contact member that contacts when the trigger lever 31 is rotated from the predetermined engagement angle position to the engagement side and restricts the rotation of the trigger lever 31 to the engagement side is Although the ring-shaped member 53 is supported by the stop lever 50, the form of the contact member is not limited to this. The contact member according to the present invention may be any member that contacts when the trigger lever 31 is rotated from the predetermined engagement angle position to the engagement side. For example, the contact member directly contacts the support structure such as the frame 5. The attached ring-shaped member 53 may be attached.

  Next, details of the latch 34 and its peripheral configuration in the holding device 1a will be described with reference to FIGS. 1 and 4 to 13. 4 to 8 are front views showing the holding device and its peripheral configuration among the opening / closing device operating mechanism of the present embodiment, and are diagrams for explaining the blocking operation of the opening / closing device operating mechanism. FIG. 4 shows a state in which the trigger roller pin is detached from the solenoid lever at the start of the blocking operation. FIG. 5 shows a state in which the latch is in contact with the stopper pin immediately after the start of the blocking operation. FIG. 6 shows a state in which the latch moves to the release side while being in contact with the stopper pin during the interruption operation. FIG. 7 shows a state where the latch lever is released from the latch in the middle of the blocking operation and the latch is in contact with the stopper surface formed on the latch base. FIG. 8 shows a state in which the blocking operation has been completed.

  As shown in FIG.1 and FIG.11, the latching base 30 is provided in the holding | maintenance apparatus 1a as a support structure mentioned above. The latch base 30 is coupled to the frame 5 by bolts or the like (not shown). Most of the latch 34 is disposed in the latch base 30. The latch base 30 supports the shaft portion 32e of the eccentric member 32 in a rotatable manner.

  As shown in FIG. 1, the latch 34 has an annular shape with the central axis of the latch rotation as an axis, and has a portion (hereinafter referred to as an annular portion) 34 x that surrounds the latch support portion 32 x of the eccentric member 32. ing. A bearing (not shown) is provided between the annular portion 34 x and the latch support portion 32 x, and the latch 34 is configured to be rotatable relative to the eccentric member 32.

  The latch 34 extends outward from the annular portion 34x toward the latch roller pin 12a at the closing angle position in the radial direction of the latch rotation center shaft 34a. When the latch lever 12 is in the closing angle position, the engaging surface 34c of the latch 34 that faces the latch roller pin 12a engages with the latch roller pin 12a. Below, the said end surface is described as the engagement surface 34c. In the present embodiment, the engagement surface 34c has a planar shape, and the plane is in a direction perpendicular to a straight line connecting the latch rotation center shaft 34a and the latch roller pin rotation center shaft 12c with the shortest distance. It extends.

  In addition, the latch 34 protrudes and extends radially outward of the latch rotation central shaft 34a compared to the engagement surface 34c on the release side (indicated by an arrow F in the drawing) from the engagement surface 34c (hereinafter, referred to as "the latch 34"). 34d). When the latch lever 12 is in the closing angle position, the tip protrusion 34d contacts the latch roller pin 12a.

  In the following description, the latch lever 12 is in a predetermined closing angle position, the latch roller pin 12a and the engagement surface 34c are engaged, and the leading end protruding portion 34d is in contact with the latch roller pin 12a. The position 34 is simply referred to as a “latch engagement position”.

  In addition, as indicated by an arrow F in the figure, the direction in which the engagement surface 34c and the tip protrusion 34d of the latch 34 are separated from the latch roller pin 12a with respect to the latch engagement position is hereinafter referred to as “release side”. The direction opposite to the “release side” is hereinafter referred to as “engagement side”.

  As shown in FIG. 1, the holding device 1a is provided with a tension coil spring (hereinafter referred to as a latch return spring) 35 that biases the latch 34 toward the engagement side so as to engage with the latch roller pin 12a. . The latch return spring 35 mainly applies a tensile load between the frame 5 as a support structure and the latch 34. The latch return spring 35 is disposed so as to expand and contract in a direction orthogonal to the latch rotation center shaft 34a. That is, the latch return spring 35 extends along a plane orthogonal to the latch rotation center axis 34a. In the following description, the direction in which the latch return spring 35 expands and contracts is simply referred to as the “stretching direction”.

  In the present embodiment, the first end portion of the latch return spring 35 has a substantially plate shape, and will be referred to as a “first hook plate 35a” below. Similarly, the second end portion has a substantially plate shape, and is hereinafter referred to as a “second hook plate 35b”. The first hook plate (first end) 35a is engaged with the latch 34, and the second hook plate (second end) is engaged with the frame 5 that is a support structure.

  The second hook plate 35b is formed with a through hole, and the pin 5b fixed to the frame 5 is fitted into the through hole. The second hook plate 35b is attached to the frame 5 so as to be rotatable about the pin 5b. In this way, the second hook plate 35b of the latch return spring 35 is engaged with the frame 5 that is a support structure.

  On the other hand, the first hook plate 35a is formed with an oval through hole (hereinafter simply referred to as “long hole”) 35c having a long axis in a direction in which the latch return spring 35 expands and contracts. A part of the latch 34 is engaged with the elongated hole 35c. Specifically, the latch 34 extends from the annular portion 34x so as to protrude outward in the radial direction of the latch rotation center shaft 34a, and is provided with a latch arm 34f that engages with the elongated hole 35c of the first hook plate 35a. Yes.

  The latch arm 34f has a pin (hereinafter referred to as an engagement pin) 34e that can be engaged with the first hook plate 35a. The engagement pin 34e extends in parallel with the latch rotation center shaft 34a and is loosely fitted in the elongated hole 35c of the first hook plate 35a. The engagement pin 34e is configured to be movable within the long hole 35c by a predetermined distance in the long axis direction thereof, that is, in the expansion / contraction direction of the latch return spring 35.

  As shown in FIG. 1, when the latch lever 12 is in the closing angle position, the engagement pin 34e is engaged with the first hook plate 35a outside the elongated hole 35c in the expansion / contraction direction. At this time, a tensile load of the latch return spring 35 acts between the latch arm 34 f and the frame 5. The latch 34 in the latch engagement position is biased toward the engagement side by a latch return spring 35.

  As indicated by an arrow F in the figure, the latch return spring 35 extends as the latch 34 rotates to the release side. As the latch return spring 35 extends, a force, that is, a tensile load, that the latch return spring 35 tends to contract increases between the latch arm 34 f and the frame 5. In response to this tensile load, a moment force (biasing force) is applied to the latch 34 to urge it to the engagement side (opposite the arrow F). Due to this urging force, the engagement surface 34c of the latch 34 is engaged with the latch roller pin 12a.

  In addition, the latch base 30 that is a support structure is a surface that restricts movement of the latch 34 to the release side (indicated by arrow F in the drawing) by contacting the latch arm 34f (hereinafter simply referred to as "stopper surface"). 30a) 30a is formed. When the latch 34 moves from the latch engagement position shown in FIG. 1 to the release side, the latch arm 34f collides with the stopper surface 30a of the latch base 30 as shown in FIG. At this time, a reaction force is applied from the stopper surface 30a to the latch arm 34f so as to move the latch 34 toward the latch engagement position as indicated by an arrow U in FIG. In response to the reaction force and the tensile load of the latch return spring 35, the latch 34 moves to the engagement side.

  In addition, as shown by an arrow F in the drawing, the holding device 1a is provided with a stopper pin 30c that restricts the movement of the latch 34 toward the engagement side. The stopper pin 30c is rotatably supported by a latch base 30 that is a support structure. The stopper pin 30c has a substantially cylindrical shape with the latch rotation center shaft 34a as an axis. The stopper pin 30c is in contact with a part of the latch 34, thereby restricting the movement of the latch 34 to the engagement side.

  Specifically, the latch 34 extends from the annular portion 34x so as to protrude outward in the radial direction of the latch rotation center shaft 34a, and can be brought into contact with the stopper pin 30c (hereinafter referred to as a contact protrusion). ) 34b is formed. When the latch 34 moves further from the latch engagement position described above to the engagement side (the side opposite to the release side indicated by the arrow F in the figure), as shown in FIGS. 5 and 8, the contact protrusion 34b. Comes into contact with the stopper pin 30c. This restricts the movement of the latch 34 toward the engagement side.

  As shown in FIGS. 1 and 3, in the holding device 1a configured as described above, when the latch lever 12 is in the closing angle position, the latch 34 is positioned in the latch engagement position described above. The engagement surface 34c and the tip protrusion 34d abut against the latch roller pin 12a. At this time, as indicated by an arrow E in FIG. 1, the latch roller pin 12a pushes the engagement surface 34c toward the latch rotation center shaft 34a. At this time, in the holding device 1a, the trigger lever rotation center axis 31b is located on the sub shaft 10 side (sub shaft rotation center axis 10c side) from the plane 41 including the latch roller pin rotation center axis 12c and the latch rotation center axis 34a. ).

  In the holding device 1a configured as described above, when the latch lever 12 is in the closing angle position, the annular portion 34x having the latch rotation center shaft 34a as the axis rotates about the trigger lever rotation center shaft 31b. The latch support portion 32x of the eccentric member 32 is pushed. As a result, a moment force (torque) is applied to the eccentric member 32 and the trigger lever 31 so as to move to the release side (indicated by the arrow C in the figure) around the trigger lever rotation center axis 31b.

  At this time, since the trigger roller pin 31a of the trigger lever 31 is engaged with the engaging portion 36e of the solenoid lever 36, the rotation of the trigger lever 31 and the eccentric member 32 to the release side is restricted. The trigger roller pin 31a pushes the engaging portion 36e of the solenoid lever 36 toward the solenoid lever rotation center shaft 36b. The solenoid lever 36 is biased by the tensile load (biasing force) of the solenoid lever return spring 37 so that the contact portion 36c contacts the lever stopper surface 45a. Therefore, the solenoid lever can rotate to the release side. Absent. Accordingly, the trigger roller pin 31a is not detached from the solenoid lever 36, and the trigger lever 31 and the eccentric member 32 are not rotated, and the holding device 1a can hold the latch lever 12 at a predetermined closing angle position. .

  In the opening / closing device operating mechanism 1 configured as described above, when the opening / closing device is turned on as shown in FIG. 3, that is, when the holding device 1a holds the latch lever 12 at a predetermined closing angle position, The moment force (biasing force) in the direction to move the movable contact 2 from the closing position to the blocking position is received by the compression load of the blocking spring 6. This moment force is transmitted to the sub shaft 10 via the main / sub connecting link 20 and the sub lever 11 (see FIG. 3).

  A moment force (biasing force) is applied to the latch lever 12 fixed to the sub-shaft 10 by the cutoff spring 6 to rotate the latch lever 12 to the cutoff side (indicated by an arrow D in FIG. 1). However, in the closed state, the latch roller pin 12a is engaged with the latch 34, and the latch lever 12 is held at a predetermined closing angle position. The movement is restricted and the state is held stationary.

  On the other hand, in the shut-off state of the opening / closing device shown in FIGS. 2 and 8, the latch return spring 35 urges the latch 34 further to the engagement side from a predetermined latch engagement position. However, when the stopper pin 30c abuts against the abutment protrusion 34b of the latch 34, the latch 34 is rotated from the latch engagement position to a position slightly rotated from the latch engagement position. Limited.

  In this state, as shown in FIG. 8, the resultant force V of the tension load vector V1 of the latch return spring 35 and the reaction force V2 received by the abutting protrusion 34b from the stopper pin 30c is the latch rotation center shaft 34a. It is acting on. This resultant force V is a moment force that further rotates the trigger lever 31 from the trigger engagement position to the engagement side. The trigger lever 31 rotated to the engagement side is brought into contact with the ring-shaped member 53 of the stop lever 50, whereby the rotation to the engagement side is limited. At this time, an initial gap 31g is formed between the trigger roller pin 31a and the engaging portion 36e of the solenoid lever 36.

[Blocking operation]
The interruption | blocking operation | movement which the opening / closing apparatus operating mechanism 1 comprised as mentioned above and its holding | maintenance apparatus 1a perform is demonstrated in time series using FIGS. In the breaking operation, the latch lever in the closing angle position rotates to the breaking side and the movable contact in the closing position moves to the breaking side, so that the switching device in the closing state is in the blocking state. Details will be described in the following.

  1 and 3, the electromagnetic solenoid 38 is excited by receiving a signal indicating a shut-off command (external command) from a control device (not shown), and moves the plunger 38a in the direction indicated by the arrow A in the figure. As a result, the solenoid lever 36 is driven.

  As a result, as shown in FIG. 4, the solenoid lever 36 rotates to the release side (indicated by arrow B in the figure), and the trigger roller pin 31a is detached from the engaging portion 36e. As a result, the trigger lever 31 and the eccentric member 32 rotate integrally on the release side (indicated by an arrow C in the figure). Then, the latch 34 starts moving toward the release side while maintaining the state where the engagement surface 34c and the latch roller pin 12a are engaged. At this time, the moment force toward the cutoff side (indicated by arrow D in the figure) acts on the latch lever 12 due to the compressive load of the cutoff spring 6. The latch lever 12 starts to rotate from the closing angle position to the blocking side.

  At this time, the latch roller pin 12a pushes the engagement surface 34c of the latch 34 toward the latch rotation center shaft 34a (indicated by an arrow E in the figure), and the trigger lever rotation center shaft 31b is moved from the arrow E to the sub shaft. It is shifted to the 10 side. For this reason, the eccentric force 32 and the trigger lever 31 are given moment force in the direction indicated by the arrow C in the drawing.

  When the trigger lever 31 and the eccentric member 32 are rotated to the release side (in the direction of the arrow C), as shown in FIG. 5, the latch rotation center shaft 34a is centered on the trigger lever rotation center shaft 31b and the release side (in the figure). A swivel motion (indicated by arrow F2). At this time, the latch 34 moves to the release side by the turning motion of the latch rotation center shaft 34a. By this movement, the abutment protrusion 34b of the latch 34 abuts on the stopper pin 30c.

  When the abutting protrusion 34b abuts against the stopper pin 30c, as shown in FIG. 6, the latch 34 performs the above-mentioned turning motion, and the latch pivot center axis with respect to the latch support portion 32x of the eccentric member 32. It rotates relative to the release side (indicated by arrow F in the figure) around 34a. At this time, since the stopper pin 30c is configured to be rotatable with respect to the latch base 30, the latch 34 does not generate friction between the abutment protrusion 34b and the stopper pin 30c, and the release side Move to.

  In this way, in the blocking operation, the latch 34 rotates to the release side about the latch rotation center axis 34a that rotates about the trigger lever rotation center axis 31b toward the release side. Simultaneously with the movement of the latch 34, the eccentric member 32 and the trigger lever 31 are also rotated to the release side. By these operations, the latch roller pin 12a is disengaged from the engagement surface 34c of the latch 34. As the latch 34 moves to the release side, the latch return spring 35 expands and the tensile load increases.

  From this state, the latch lever 12 pushes the latch 34 and rotates to the blocking side. Then, as shown in FIG. 7, the latch arm 34 f and the stopper surface 30 a of the latch base 30 collide with each other. Due to this collision, the latch 34 changes the moving direction from the release side to the engagement side. Due to this collision, the latch arm 34f receives a reaction force in the direction indicated by the arrow U in the drawing from the stopper surface 30a. At this time, since the latch rotation center shaft 34a is located on the latch arm 34f side with respect to the trigger lever rotation center shaft 31b, the eccentric member 32 has a moment about the trigger lever rotation center shaft 31b. Force (torque) is generated. This moment force causes the eccentric member 32 and the trigger lever 31 to rotate to the engagement side.

  The tensile load on the latch return spring 35 does not increase due to the collision between the latch arm 34f and the stopper surface 30a, but the extension of the latch return spring 35 does not stop suddenly due to the inertial force of the first hook plate 35a. At this time, even if the engaging pin 34e of the latch arm 34f moves in the elongated hole 35c of the first hook plate 35a toward the second hook plate 35b, the direction in which the latch 34 is suddenly rotated is changed. The extension change of the latch return spring 35 can be absorbed, and the movement of the latch 34 to the engagement side immediately after the collision with the stopper surface 30a is not hindered by the extension change of the latch return spring 35.

  After the state shown in FIG. 7, the latch lever 12 stops at a predetermined blocking angle position. On the other hand, the latch 34 receives the tensile load of the latch return spring 35 and moves to the engagement side. Then, the latch 34 moves slightly beyond the latch engagement position described above to the engagement side, and as shown in FIG. 8, the contact projection 34b comes into contact with the stopper pin 30c and stops. . The latch return spring 35 biases the latch 34 so that the abutting protrusion 34b abuts against the stopper pin 30c.

  On the other hand, the trigger lever 31 rotates to the engagement side by the moment force generated by the above-described collision and the moment force generated by the tensile load of the latch return spring 35. The trigger lever 31 collides with the ring-shaped member 53 of the stop lever 50 as shown in FIG. 8 when it slightly turns to the engagement side beyond the trigger engagement position. At this time, the ring-shaped member 53 absorbs the impact by elastically deforming.

  In the state where the interruption operation shown in FIG. 8 is completed (hereinafter simply referred to as “interruption state”), the excitation of the electromagnetic solenoid 38 has been completed, and the plunger 38a has returned to the position before the excitation. For this reason, the solenoid lever 36 is rotated to the engagement side by the urging force of the solenoid lever return spring 37, and is urged to a predetermined trigger engagement position and stops. The solenoid lever 36 receives the trigger roller pin 31a immediately after colliding with the link member 53 by the engaging portion 36e, and engages the trigger roller pin 31a at the trigger engagement position.

  According to the holding device 1a of the present embodiment, the latch return spring 35 is used to rotate the trigger lever 31 rotated from the trigger engagement position to the release side and return the trigger lever 31 to the trigger engagement position again. Moment force generated by tensile load is used. For this reason, the holding device 1a does not require a dedicated spring (for example, a torsion coil spring) for returning the trigger lever 31 to the trigger engagement position.

  FIG. 2 shows the shut-off operation end state as in FIG. The latch 34 is urged by a latch return spring 35 to return to a position slightly moved to the engagement side from the latch engagement position in the closed state (see FIGS. 1 and 3). The solenoid lever 36 is urged by a solenoid lever return spring 37 to return to the trigger engagement position. The trigger lever 31 is engaged with the solenoid lever 36 via the trigger roller pin 31a at the trigger engagement position.

[Configuration for performing the input operation]
Next, the configuration for the opening / closing device operating mechanism 1 and its holding device 1a to perform the closing operation will be described with reference to FIGS. 1, 2, 3, 9, and 10. FIG. In the following description, a mechanism for performing the closing operation is referred to as a “loading mechanism” and denoted by reference numeral 1e.

  FIG. 9 and FIG. 10 are front views showing the holding device and its peripheral configuration among the opening / closing device operating mechanism of this embodiment, and are diagrams for explaining the blocking operation of the opening / closing device operating mechanism. FIG. 9 shows a state in which the cam lever and the latch lever are rotated following the closing cam immediately after the start of the closing operation. FIG. 10 shows a state in which the latch lever starts to engage with the latch during the closing operation.

  FIG. 2 shows a shut-off state, and shows a state where the closing spring 21 is compressed and stored in the closing mechanism 1e (hereinafter referred to as a stored state). Note that the closing spring 21 can be stored in an energized state by rotationally driving the closing shaft 4 with a motor (not shown) or the like. In addition, since it is a prior art about a structure and its operation | movement for making a closing spring into a stored state, description is abbreviate | omitted.

  As shown in FIG. 2, the closing spring 21 is configured as a compression coil spring, one end is fixed to the mounting surface 5 a of the frame 5, and the other end is engaged with the closing spring receiver 22. Between the closing spring receiver 22 and the frame 5, a force that the closing spring 21 tends to extend, that is, a compressive load is applied.

  On the other hand, a closing lever 23 is fixed to the closing shaft 4. The closing lever 23 is configured to rotate integrally with the closing cam 25 about the closing shaft rotation central axis 4a described above. The expansion and contraction of the closing spring 21 is transmitted to the closing lever 23 via the closing link 24. The closing link 24 has one end engaged with a pin 22 a provided on the closing spring receiver 22, and the other end engaged with a pin 23 a provided on the closing lever 23. That is, in the closing mechanism 1e, as the closing spring 22 extends as indicated by the arrow M in the figure, the closing lever 23 rotates as indicated by the arrow M and the closing cam 25 rotates as indicated by the arrow N. Configured to work.

  A closing cam 25 that rotates integrally with the closing lever 23 is engaged with the sub shaft 10 via the cam roller 13 a and the cam lever 13 described above. The closing cam 25 is engaged with the latch lever 12 through the sub shaft 10 and is engaged with the movable contact 2 through the sub lever 11, the main / sub connecting link 20, the main lever 3, and the link mechanism 2a. . In the closing operation, in conjunction with the extension of the closing spring 21, the movable contact 2 moves from the blocking position to the closing side, and the latch lever 12 rotates from the blocking angle position to the closing side.

  In addition, in the closing mechanism 1e, when the closing operation is not performed, the closing lever 23 is referred to as a predetermined position (hereinafter referred to as an engagement position) against a force (biasing force) that the closing spring 21 tends to extend. ) Has a closing latch lever 26 that can be engaged with the closing lever 23. At one end of the closing lever 23, a claw 23b for engaging with the locking lever 26 for closing is provided. A semi-cylindrical portion 26 a that can be engaged with the claw 23 b is provided at an end of the closing lever 26 on the closing lever 23 side. Before the throwing operation is performed, the throwing locking lever 26 is engaged with the throwing lever 23 via the claw 23b and the semi-cylindrical portion 26a.

  Further, the closing mechanism 1 e includes a spring (hereinafter simply referred to as “return spring”) 27 that urges the closing latch lever 26 at a predetermined position that engages with the closing lever 23, and a closing latch lever 26. Electromagnetic solenoid actuator (hereinafter simply referred to as “electromagnetic solenoid for input”) that drives the input latch lever 26 against the force (biasing force) of the return spring 27 to extend so that the input lever 23 is disengaged from the actuator. 28). One end portion of the return spring 27 is engaged with the closing latch lever 26 and the other end portion is fixed to the frame 5. The return spring 27 is configured as a compression coil spring that mainly receives a compression load, and urges the closing latch lever 26 so as to come into contact with the plunger 28 a of the closing electromagnetic solenoid 28. By abutting with the plunger 28a, the turning of the closing latch lever 26 to the plunger 28a side is restricted.

  In the shut-off state shown in FIG. 2, the making mechanism 1e has the making shaft rotation center axis 4a for making the making as compared with the center axis 24a of the making link 24 (that is, a plane including the axis of the pin 22a and the axis of the pin 23a). It is configured to be located on the side opposite to the locking lever 26 (left side in the figure). Therefore, a moment force (torque) in the direction indicated by the arrow L in the figure (hereinafter referred to as the release side) is applied to the closing lever 23 by the biasing force of the closing spring 21. However, in the shut-off state, the closing lever 23 is held at a predetermined engagement position by engaging the claw 23 b with the semi-cylindrical portion 26 a of the locking closing lever 26.

[Throwing operation]
Next, the closing operation of the opening / closing device operating mechanism 1 will be described with reference to FIGS. 1, 2, 3, 9 and 10. The closing operation from the shut-off state of the switchgear shown in FIG. 2 to the switch-on state of the switchgear shown in FIGS. 1 and 3 will be described.

  In the shut-off state shown in FIG. 2, the closing electromagnetic solenoid 28 is excited by receiving a signal indicating a closing command (external command) from a control device (not shown), and moves the plunger 28a as indicated by an arrow K in the figure. As a result, the closing latch lever 26 is rotated against the urging force of the return spring 27.

  As a result, the claw 23b is disengaged from the semi-cylindrical portion 26a of the closing lever 26 for closing, and the closing lever 23 is shown by an arrow L in FIG. It rotates in the direction indicated by. As the closing spring 21 extends as shown by an arrow M in the figure, the compression load decreases, that is, is released. As the closing spring 21 extends, the closing shaft 4 and the closing cam 25 rotate in the direction indicated by the arrow N in the figure around the closing shaft rotation center axis 4a.

  At this time, as shown in FIG. 9, the closing cam 25 and the cam roller 13 a are engaged, and the cam lever 13 and its associated members, that is, the sub shaft 10 and the latch lever 12 are driven to the closing side. 9, the cam lever 13 rotates as indicated by an arrow O, and the latch lever 12 rotates toward the closing side as indicated by an arrow S.

  In addition, the rotation of the closing cam 25 also drives the members interlocking with the sub shaft 10, that is, the sub lever 11, the main / sub connecting link 20, the main lever 3, the link mechanism 2a, and the movable contact 2 to the closing side. As the main lever 3 rotates, the cutoff spring 6 is compressed and stored. At the same time, the movable contact 2 is driven to the closing side toward the closing position against the urging force of the breaking spring 6.

  Then, as shown in FIG. 10, the latch roller pin 12a of the latch lever 12 abuts against the latch 34, and the latch 34 is against the biasing force of the latch return spring 35, as shown by the arrow T in the drawing. To drive. The latch lever 12 rotates slightly from the closing angle position (see FIG. 1) to the closing side, and the latch 34 moves slightly to the release side from the engaging position.

  When the closing cam 25 rotates 180 degrees from the shut-off state shown in FIG. 2, the closing cam 25 and the cam roller 13a are not engaged. Then, the latch lever 12 returns to the closing angle position by the urging force of the cutoff spring 6, and the latch 34 returns to the engagement position by the urging force of the latch return spring 35. Thereby, the engaging surface 34c of the latch 34 is engaged again with the latch roller pin 12a (see FIGS. 1 and 3).

  At this time, the latch roller pin 12a pushes the engagement surface 34c of the latch 34 toward the latch rotation center shaft 34a as shown by an arrow E in FIG. A moment force is applied to rotate on the release side (indicated by arrow C in the figure) about the lever rotation center shaft 31b. However, since the trigger roller pin 31a of the trigger lever 31 is engaged with the engaging portion 36e of the solenoid lever 36, the rotation of the trigger lever 31 and the eccentric member 32 to the release side is restricted. Thus, by holding the latch lever 12 again at the predetermined closing angle position, the member interlocked with the latch lever 12 and the member interlocked with the latch 34 engaged with the latch lever 12 also perform the operation. Stop and complete the loading operation.

  In FIGS. 1 and 3, the closing shaft 4 and the closing cam 25 are further rotated 180 degrees in the same direction as the closing operation in order to store the closing spring 21 from the state where the closing operation is completed. That is, a state in which an energy storing operation for storing the closing spring 21 is performed is shown. The closing cam 25 and the closing shaft 4 and the members linked thereto rotate 180 degrees in the direction indicated by the arrow N in FIG. 2 in the closing operation, and 180 degrees in the same direction as the closing operation in the storing operation of the closing spring 21. Rotate.

  As described above, in the opening / closing device operating mechanism 1 of the present embodiment, the holding device 1a has the first end engaged with the latch 34, and the second end is the frame 5 that is a support structure. And a latch return spring 35 that urges the latch 34 that has moved from the latch engagement position to the release side in the above-described blocking operation toward the engagement side. The latch return spring 35 was a tension coil spring (helical extension spring) arranged to expand and contract in a direction orthogonal to the latch rotation center axis. For this reason, in order to shorten the time required for the switchgear from the on state to the shut-off state, even when a latch return spring having a large spring constant is used, compared to the case where the above-described “torsion coil spring” is used. Thus, the latch return spring can be prevented from increasing in size in the axial direction of the latch rotation center shaft 34a.

  Further, in the holding device 1a of the opening / closing device operating mechanism 1 of the present embodiment, the eccentric member 32 has a substantially columnar shape with the trigger lever rotation center shaft 31b as an axis in addition to the latch support portion 32x. The support structure includes a frame 5 that rotatably supports the input shaft 4 and the sub-shaft 10, and a latch that is coupled to the frame 5 and rotatably supports the shaft portion 32e. The base 30 was included. As a result, it is possible to suppress the elastic deformation and vibration of the making shaft 4 and the elastic deformation and vibration of the sub shaft 10 during the making operation from being directly transmitted to the latch 34, and the possibility of malfunction of the latch 34 can be prevented. It is possible to reduce.

  Further, in the holding device 1a of the opening / closing device operating mechanism 1 of the present embodiment, the latch base 30 is rotatably supported, and the latch 34 abuts, thereby restricting the movement of the latch 34 to the engagement side. A stopper pin 30c is further provided. The stopper pin 30c comes into contact with the latch 34 when the latch rotation center shaft 34a is pivoting toward the release side about the trigger lever rotation center shaft 31b in the blocking operation. After the contact, the latch 34 rotates to the release side about the latch rotation center shaft 34a. Since the stopper pin 30c is rotatably supported by the latch base 30, the stopper pin 30c rotates when the latch 34 is in contact with the stopper pin 30c. Thereby, when the latch 34 moves to the release side in the shut-off operation, the friction generated between the latch 34 and the stopper pin 30c can be made as small as possible.

  In the holding device 1a of the opening / closing device operating mechanism 1 of the present embodiment, the latch 34 has an annular shape with the latch rotation center shaft 34a as an axis, and an annular portion 34x that surrounds the latch support portion 32x. And an abutting protrusion 34b that protrudes radially outward of the latch rotation center shaft 34a from the annular portion 34x and can abut against the stopper pin 30c. In the blocking operation, when the latch 34 moves from the engagement position to the release side, the abutment protrusion 34b of the latch 34 abuts against the stopper pin 30c. At this time, the contact protrusion 34b is preferably configured to have a shape in which friction generated between the contact protrusion 34b and the stopper pin 30c is minimized.

  Further, in the holding device 1a of the opening / closing device operating mechanism 1 according to the present embodiment, the latch 34 protrudes from the annular portion 34x so as to protrude radially outward of the latch rotation central shaft 34a. It further has a latch arm 34f to which an engaging pin 34e that engages with the end portion (first hook plate 35a) is fixed. The latch base 30 is formed with a stopper surface 30a that abuts the latch arm 34f to restrict the movement of the latch 34 to the release side. When the latch 34 moves to the release side, the latch arm 34 f collides with the stopper surface 30 a of the latch base 30. At this time, a reaction force (indicated by an arrow U in FIG. 7) acts to move the latch 34 to the engagement side from the stopper surface 30a to the latch arm 34f. The latch 34 can be moved to the engagement side by the reaction force and the tensile load of the latch return spring 35. By setting it as such a structure, compared with the case where it does not have the stopper surface 30a, the spring constant of the latch return spring 35 can be made smaller. An increase in the size of the latch return spring 35 due to an increase in the diameter of the wire can be suppressed.

  Further, in the holding device 1a of the opening / closing device operating mechanism 1 of the present embodiment, the first end portion of the latch return spring 35 has a substantially plate shape, and is long in the expansion / contraction direction in which the latch return spring 35 expands and contracts. It is the 1st hook board 35a in which the long hole 35c which is a through-hole which has an axis | shaft was formed. The engaging pin 34e is loosely fitted in the elongated hole 35c, and is movable in the direction in which the latch return spring expands and contracts in the elongated hole 35c. Immediately after the latch arm 34f and the stopper surface 30a collide, the latch pin 34e of the latch arm 34f moves in the elongated hole 35c of the first hook plate 35a toward the second hook plate 35b, thereby latching by collision. Even if the direction in which 34 is suddenly rotated is changed, the extension change of the latch return spring 35 can be absorbed. The movement of the latch 34 toward the engagement side immediately after the collision with the stopper surface 30 a is not hindered by the change in the extension of the latch return spring 35.

  Further, in the holding device 1a of the opening / closing device operating mechanism 1 according to the present embodiment, when the trigger lever 31 is rotated to the engagement side as compared with the predetermined trigger engagement position described above, the trigger lever 31 comes into contact with the trigger lever 31. The ring-shaped member 53 is provided as a contact member that restricts rotation of the trigger lever 31 toward the engagement side. Accordingly, when the trigger lever 31 is rotated to the engagement side by the moment force generated by the tensile load of the latch return spring 35, the trigger lever 31 is largely rotated to the engagement side beyond the above-described trigger engagement position. It is possible to prevent the impact when the trigger roller pin 31a is engaged with the solenoid lever 36 at the trigger engagement position.

  Further, in the holding device 1a of the opening / closing device operating mechanism 1 of the present embodiment, the contact member (ring-shaped member 53) is made of a polymer material, and elastically deforms when the trigger lever 31 contacts. An O-ring 53c is provided as a deformed portion. The O-ring 53c is elastically deformed so that the ring-shaped member 53 can absorb an impact when the trigger lever 31 collides.

  Further, in the opening / closing device operating mechanism 1 of the present embodiment, the holding device 1a supports the ring-shaped member 53 as the adjusting mechanism 1c that adjusts the position of the ring-shaped member 53 that is a contact member, and the support structure. A stop lever 50 configured to be rotatable with respect to the frame 5 which is an object, and the stop lever 50 and the bolt head 51e are engaged with each other, and a change in the position in the axial direction with respect to the base 52 which is a support structure As a result, the adjustment bolt 51 that is a bolt that can position the angular position of the rotation of the stop lever 50 and the male screw 51a of the adjustment bolt 51 are screwed together, and the nut 51b that fixes the adjustment bolt 51 to the base 52. , 51c. By changing the axial position where the adjustment bolt 51 is coupled to the base 52 that is the support structure, the angular position of the rotation of the stop lever 50 with respect to the frame 5 that is the support structure is determined. The position of the ring-shaped member (contact member) 53 supported by the stop lever 50 can be adjusted. That is, the initial gap 31g between the trigger roller pin 31a and the engaging portion 36e of the solenoid lever 36 can be adjusted according to the fastening position between the adjusting bolt 51 and the nuts 51b and 51c.

  In this embodiment, the ring-shaped member 53 as a contact member that restricts the rotation of the trigger lever 31 to the engagement side by contacting the trigger lever 31 is made of a polymer material, and the trigger Although the elastic deformation portion that elastically deforms when the lever comes into contact is provided, the contact member according to the present invention is not limited to this mode. Any member can be used as long as it can absorb an impact when the trigger lever comes into contact. For example, a spring element may be provided as the contact member.

  In this embodiment, the contact member that contacts the trigger lever 31 is the ring-shaped member 53 supported by the stop lever 50. However, the aspect of the contact member is not limited to this. Absent. For example, the stop lever 50 itself can be configured to contact the trigger lever 31 without providing the ring-shaped member 53. Below, the example is demonstrated.

[Second Embodiment]
Next, a holding device of the opening / closing device operating mechanism of the second embodiment will be described with reference to FIG. FIG. 14 is a front view showing the holding device of the opening / closing device operating mechanism of this embodiment and its peripheral configuration, and shows a state where the stop lever is in contact with the trigger lever. In addition, about the structure substantially common to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 14, in the holding device for the opening / closing device operating mechanism of the present embodiment, the stop lever 60 is rotatable about a pin 50 a fixed to a frame (not shown) as a support structure. It is configured. In the shut-off operation, the trigger lever 31 rotated further to the engagement side from the trigger engagement position described above comes into contact with the stopper surface 60c curved toward the trigger lever 31 among the stop levers 60, The rotation of the trigger lever 31 toward the engagement side is limited. That is, in the holding device of the present embodiment, the stop lever 60 is provided as a contact member that contacts when the trigger lever 31 rotates to the engagement side.

  In addition, the holding device has an adjustment mechanism 1h that can adjust the angular position of the rotation of the stop lever 60 that is a contact member. The adjusting mechanism 1h includes a bolt (hereinafter referred to as a moving bolt) 61 that changes the angular position of the rotation of the stop lever 60, and a spring (hereinafter referred to as a buffer spring) 64 that biases the moving bolt 61 to a predetermined position. And have. A pin 60 b for attaching the moving bolt 61 is fixed to the stop lever 60.

  The moving bolt 61 has a bolt head portion 61e in which a hole fitted to the pin 60b is formed, and a male screw portion 61a into which the nuts 61b and 61c are screwed. The bolt head 61e is fitted so as to be rotatable about the pin 60b of the stop lever 60. Thereby, the moving bolt 61 and the stop lever 60 are relatively rotatable.

  The moving bolt 61 has a male screw portion 61a inserted into a through hole 52a formed in a base 52 that is a support structure. The moving bolt 61 is fastened to the male screw 61a by nuts 61b and 61c being screwed to the male screw 61a on the bolt head 61e side of the base 52. The position of the moving bolt 61 in the axial direction with respect to the base 52 is positioned according to the position where the nuts 61b and 61c are fastened in the male screw portion 61a. That is, the angular position of the rotation of the stop lever 60 can be changed according to the position where the nuts 61b and 61c are fixed.

  Further, as shown in FIG. 14, the moving bolt 61 is separated from the trigger lever 31 and the stop lever 60 from the state in which the nut 61c and the base 52 are in contact with each other, as indicated by the arrow G in the drawing together with the nut 61b and the nut 61c. It is possible to move to the side.

  In the following description, the direction in which the stop lever 60 is separated from the trigger lever 31 is referred to as a “separation side”. Further, as indicated by an arrow G in the figure, the direction in which the nut 61c screwed to the moving bolt 61 is separated from the base 52 in conjunction with the rotation of the stop lever 60 toward the separation side is also "separation side". . In addition, the direction opposite to the separated side is hereinafter referred to as “contact side”.

  In addition, a portion of the moving bolt 61 that protrudes radially outward with respect to the male screw portion 61a at the end opposite to the bolt head 61e in the axial direction and abuts against one end of the buffer spring 64 described above. 61d (hereinafter referred to as a protruding end) is formed.

  The buffer spring 64 is configured as a compression coil spring, and is disposed on the radially outer side of the male screw portion 61a. One end of the buffer spring 64 is in contact with the protruding end 61d of the moving bolt 61, and the other end is in contact with the base 52 that is a support structure. The buffer spring 64 applies a compressive load (biasing force) between the protruding end 61 d of the moving bolt 61 and the base 52. The buffer spring 64 urges the moving bolt 61 toward the contact side so that the nut 61c is positioned at a predetermined position where the nut 61c contacts the base 52.

  In the adjusting mechanism 1h configured as described above, as shown in FIG. 14, when the trigger lever 31 rotates to the engagement side beyond the above-described trigger engagement position and collides with the stop lever 60, the buffer spring 64 The moving bolt 61 moves to the separating side as shown by the arrow G in the figure against the urging force, and the stop lever 60 also rotates from the trigger lever 31 to the separating side in conjunction with the movement. In this way, the shock when the trigger lever 31 collides with the stop lever 60 can be absorbed by the buffer spring 64.

  In addition, in the moving bolt 61, by adjusting the position where the nuts 61b and 61c are fastened to the male screw portion 61a, that is, the position of the moving bolt 61 with respect to the base 52, the angular position of the rotation of the stop lever 60 is changed. By adjusting the initial gap formed between the stop lever 60 and the trigger lever 31 to an appropriate value, the impact generated when the trigger roller pin 31a is engaged with the engaging portion 36e of the solenoid lever 36 again. The force can be reduced.

Other Embodiment
In addition to the embodiment described above, various modifications can be made to the opening / closing device operating mechanism and the holding device for the opening / closing device operating mechanism.

  In the above-described embodiment, in order to limit the rotation of the trigger lever 31 toward the engagement side, the stop lever 50 or the stop lever 60 that can rotate with respect to the frame 5 that is the support structure is provided. Although the trigger lever 31 is brought into contact with the ring-shaped member 53 or the stop lever 60 supported by the above, the form of the contact member according to the present invention is not limited to this form. It is also preferable that the contact member is supported by the frame 5 and the base 52 which are support structures.

  As mentioned above, although some embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope equivalent to the invention described in the claims as well as included in the gist of the invention.

DESCRIPTION OF SYMBOLS 1 Opening / closing device operating mechanism 1a Holding device 1c, 1h of opening / closing device operating mechanism Adjustment mechanism 1e Input mechanism 2 Movable contact 2a Link mechanism 3 Main lever 3a, 3b Pin 4 Input shaft 4a Input shaft rotation center axis 5 Frame (support structure)
5a Mounting surface 5b Pin 5e Stopper 6 Blocking spring 7 Blocking spring receiver 8 Damper 8a Piston 9 Blocking spring link 10 Subshaft 10c Subshaft rotation center axis 11 Sublever 11a Pin 12 Latch lever 12a Latch roller pin 12c Latch roller pin rotation center axis 13 Cam lever 13a Cam roller 20 Main / sub connecting link 21 Closing spring 22 Closing spring receiver 22a Pin 23 Closing lever 23a Pin 23b Claw 24 Closing link 25 Closing cam 26 Closing lever 26a Semi-cylindrical portion 27 Return spring 28 Sliding electromagnetic solenoid 28a Plunger 30 Latch base (support structure)
30a Stopper surface 30c Stopper pin 31 Trigger lever 31a Trigger roller pin 31b Trigger lever rotation center shaft 31g Initial gap 32 Eccentric member 32e Shaft portion 32x Latch support portion 34 Latch 34a Latch rotation center shaft 34b Abutting protrusion 34c Engagement Surface 34d Tip protrusion 34e Engaging pin 34f Latch arm 34x Annular portion 35 Latch return spring 35a First hook plate (first end of latch return spring)
35b Second hook plate (second end of latch return spring)
35c Elongate hole 36 Solenoid lever 36b Solenoid lever rotation center shaft 36c Abutting portion 36e Engaging portion 37 Solenoid lever return spring 38 Breaking electromagnetic solenoid 38a Plunger 41 Plane 45 Lever base (support structure)
45a Lever stopper surface 50 Stop lever 50a, 50b Pin 51 Adjustment bolt 51a Male thread 51b, 51c Nut 51e Bolt head 52 Base (support structure)
52a Through hole 53 Ring-shaped member (contact member)
53a Pin 53c O-ring (elastically deformed part)
53e Cover 60 Stop lever (contact member)
60b Pin 60c Stopper surface 61 Moving bolt 61a Male thread 61b, 61c Nut 61e Bolt head 61d Projecting end 64 Buffer spring

Claims (11)

A switchgear operating mechanism capable of shifting the switchgear between a turned-on state and a shut-off state by operating a movable contact,
A sub-shaft that is rotatably provided to the support structure and rotates in conjunction with the movement of the movable contact;
It is provided so as to be rotatable with respect to the support structure, supports the latch roller pin so as to be rotatable around the rotation center axis of the latch roller pin, and is fixed to the sub shaft so as to be the rotation axis of the sub shaft. A latch lever that pivots about
A cutoff spring that biases the latch lever toward a predetermined cutoff angle position so that the movable contact is located at a predetermined cutoff position where the switchgear is in a cutoff state;
A holding device that holds the latch lever at a predetermined closing angle position against a biasing force of the shut-off spring so that the movable contact is positioned at a predetermined closing position where the opening and closing device is in a closing state;
With
The holding device is
A latch in which the latch roller pin engages with an engagement surface when the latch lever is in the closing angle position, and engages with the latch lever via the latch roller pin;
A trigger lever that rotatably supports the trigger roller pin and rotates with respect to the support structure;
The trigger lever has a latch support portion that supports the latch so as to be pivotable about the latch pivot center axis, and extends in parallel with the latch pivot center axis. An eccentric member that rotates integrally with the
The trigger lever and the eccentric member are disengaged by being driven by an electromagnetic solenoid and configured to be rotatable with respect to the support structure and engaging the trigger lever via the trigger roller pin. A solenoid lever that restricts rotation to
Have
When the latch lever is positioned at the closing angle position, the trigger lever rotation center axis is positioned on the sub-shaft side from a plane including the latch roller pin rotation center axis and the latch rotation center axis. It is configured as
In the shut-off operation in which the latch lever rotates from the closing angle position to the shut-off side, the solenoid lever is rotated by being driven by the electromagnetic solenoid, and the trigger roller pin is detached from the solenoid lever, and the trigger lever and When the eccentric member rotates to the release side, the latch rotates to the release side about the latch rotation center axis that pivots to the release side about the trigger lever rotation center axis, and the latch and The engagement with the latch lever is released, and the latch lever is configured to rotate from the closing angle position to the shut-off side by the biasing force of the shut-off spring,
The holding device is
The first end is engaged with the latch, the second end is engaged with the support structure, and is arranged to expand and contract in a direction orthogonal to the latch rotation center axis. An opening / closing device operating mechanism, further comprising: a latch return spring that is a tension coil spring that biases the latch that has moved to the release side in the blocking operation toward the engagement side. In addition to the latch support portion, the eccentric member has a shaft portion that is a substantially cylindrical portion having the trigger lever rotation center axis as an axis,
2. The support structure according to claim 1, wherein the support structure includes a frame that rotatably supports the sub-shaft, and a latch base that is coupled to the frame and rotatably supports the shaft portion. Switchgear operating mechanism. A stopper pin that is rotatably supported by the latch base and restricts movement of the latch toward the engagement side when the latch abuts;
3. The stopper pin according to claim 2, wherein the stopper pin abuts on the latch when the latch pivot center axis is pivoting toward the release side about the trigger lever pivot center axis in the blocking operation. Switchgear operating mechanism. The latch is
An annular part having an axis centered on the latch rotation center axis, and an annular part that surrounds the latch support part;
A projecting part for abutment that projects from the annular part to the outside in the radial direction of the central axis of rotation of the latch, and that can abut against the stopper pin;
The switchgear operating mechanism according to claim 3, wherein: The latch extends from the annular portion so as to protrude radially outward of the central axis of rotation of the latch, and includes a latch arm to which an engagement pin that engages with a first end portion of the latch return spring is fixed. And further,
The opening / closing device operating mechanism according to claim 4, wherein the latch base is formed with a stopper surface that abuts on the latch arm to limit the movement of the latch to the release side. The first end portion of the latch return spring is formed with a long hole which is a through hole having a long axis in a direction in which the latch return spring expands and contracts.
6. The opening / closing device operating mechanism according to claim 5, wherein the engaging pin is loosely fitted in the elongated hole, and is movable in the elongated hole in a direction in which the latch return spring expands and contracts. . Compared to a predetermined trigger engagement position where the trigger lever is engaged with the solenoid lever, the trigger lever is brought into contact with the engagement side of the trigger lever by contacting when the trigger lever is rotated toward the engagement side. The switchgear operating mechanism according to any one of claims 1 to 6, further comprising a contact member that restricts rotation. 8. The opening / closing device operating mechanism according to claim 7, wherein the contact member has an elastic deformation portion made of a polymer material that is elastically deformed when the trigger lever comes into contact. The holding device is an adjustment mechanism for adjusting the position of the contact member.
A stop lever that supports the contact member and is configured to be rotatable with respect to the support structure;
The stop lever and the bolt head are engaged, and an adjustment bolt capable of positioning the angular position of rotation of the stop lever by changing the axial position with respect to the support structure;
A nut that is screwed into the male thread portion of the adjustment bolt and fixes the adjustment bolt to the support structure;
The switchgear operating mechanism according to claim 7 or 8, characterized by comprising: The contact member is a stop lever configured to be rotatable with respect to the support structure;
The bolt head engages with the stop lever, and is configured to be movable in the axial direction with respect to the support structure. The movement changes the angular position of the stop lever according to the movement. Bolts,
A buffer spring that biases the moving bolt to a predetermined position by applying a compressive load between the moving bolt and the support structure;
With
8. The opening and closing according to claim 7, wherein when the trigger lever comes into contact with the stop lever, the stop lever rotates to the side away from the trigger lever against the biasing force of the buffer spring. Device operation mechanism. By operating the movable contact, it is possible to move the switchgear between the on-state and the shut-off state, provided to be rotatable with respect to the support structure, and in conjunction with the movement of the movable contact A sub-shaft that rotates with respect to the support structure, supports the latch roller pin so as to be rotatable about the rotation center axis of the latch roller pin and is fixed to the sub-shaft A latch lever that rotates about a shaft rotation center axis, and a shut-off that biases the latch lever toward a predetermined shut-off angle position so that the movable contact is positioned at a predetermined shut-off position where the switchgear is shut off And an opening / closing device operating mechanism comprising a spring, so as to resist the biasing force of the shut-off spring so that the movable contact is positioned at a predetermined closing position where the opening / closing device is in a closing state. A holding device of the switchgear operating mechanism for holding the latch lever in a predetermined charged angle position,
A latch in which the latch roller pin engages with an engagement surface when the latch lever is in the closing angle position, and engages with the latch lever via the latch roller pin;
A trigger lever that rotatably supports the trigger roller pin and rotates with respect to the support structure;
The trigger lever has a latch support portion that supports the latch so as to be pivotable about the latch pivot center axis, and extends in parallel with the latch pivot center axis. An eccentric member that rotates integrally with the
The trigger lever and the eccentric member are disengaged by being driven by an electromagnetic solenoid and configured to be rotatable with respect to the support structure and engaging the trigger lever via the trigger roller pin. A solenoid lever that restricts rotation to
Have
When the latch lever is positioned at the closing angle position, the trigger lever rotation center axis is positioned on the sub-shaft side from a plane including the latch roller pin rotation center axis and the latch rotation center axis. It is configured as
In the shut-off operation in which the latch lever rotates from the closing angle position to the shut-off side, the solenoid lever is rotated by being driven by the electromagnetic solenoid, and the trigger roller pin is detached from the solenoid lever, and the trigger lever and When the eccentric member rotates to the release side, the latch rotates to the release side about the latch rotation center axis that pivots to the release side about the trigger lever rotation center axis, and the latch and The engagement with the latch lever is released, and the latch lever is configured to rotate from the closing angle position to the shut-off side by the biasing force of the shut-off spring,
The first end is engaged with the latch, the second end is engaged with the support structure, and is arranged to expand and contract in a direction orthogonal to the latch rotation center axis. A holding device for an opening / closing device operating mechanism, further comprising: a latch return spring that is a tension coil spring that biases the latch that has moved to the release side in the blocking operation toward the engagement side.

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