JP3678545B2 - Interlock device for switchgear operating mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an interlock device for preventing double closing by manual operation in an operation mechanism of a switching device such as a circuit breaker or a switch.
[0002]
[Prior art]
In switchgears such as circuit breakers and switches, for example, when an abnormality such as an overcurrent flows, it is possible to quickly disconnect only the circuit where the abnormality has occurred, and it is possible to turn it on again after eliminating the abnormality Therefore, operation means such as buttons and levers are provided at positions operable from the outside of the opening / closing device itself, and can be turned on / off by operating the operation means.
[0003]
However, in an open / close device equipped with such an operation means, when the operator makes a mistaken input operation under the input state, that is, when double input is performed, the input / removal is performed continuously. Since the operating mechanism operates alone in the state, and there is a risk that the operating mechanism may operate with more energy than a normal input device, the input operation of the operating means in the input state is invalidated For the purpose of preventing double charging, an interlock device as disclosed in, for example, Japanese Patent Application Laid-Open Nos. 57-165928 and 60-230323 is provided.
[0004]
5-8 is an operation explanatory view of the interlock device disclosed in JP-A-57-165928, FIGS. 5 and 6, the cut-off state of the contact 7, 7 and 8, The input state of the contact 7 is shown.
[0005]
In these drawings, reference numeral 1 denotes a closing cam pivotally supported on the shaft 2, and 5 denotes a closing lever linked to the contact 7. In the open state of the contact 7 shown in FIG. 5 , the closing lever 5 is positioned at the small diameter portion of the closing cam 1, and the closing cam 1 is located between the crank 20 fixed to the shaft 2 and an appropriate fixing position. Power is stored in the clockwise direction in the figure by the spring force of the inserted closing spring 21. In this state, the trigger pin 10 protruding from the shaft 2 on one surface of the closing cam 1 is supported by the support 3. It is supported by restraining the rotation of the input cam 1.
[0006]
The end of the support 3 on the side opposite to the contact side with the trigger pin 10 is supported rotatably by the support shaft 30. A button plate 31 is pivotally supported on the support shaft 30 at a position different from that of the support 3, and a closing button 32 for a manual closing operation is formed integrally with a part of the button plate 31, The button plate 31 is swung around the support shaft 30, and the pressing operation is stopped to return the button plate 31 to the original position by the spring force of the return spring 33.
[0007]
The button plate 31 is provided with a pivot pin 34 projecting in parallel with the button plate 31 at a position eccentric to one side of the support shaft 30, and the support plate 3 is in the vicinity of the contact portion with the trigger pin 10. In addition, a pin 35 protruding parallel to the support shaft 30 is provided. A double throwing prevention plate 36 is pivotally supported on the pivot pin 34, and one side of the double throwing prevention plate 36 is a spring of a biasing spring 37 installed between an appropriate fixed position. It is pressed against the tip of the closing lever 5 by force, and the other side faces the pin 35.
[0008]
In the circuit breaker having the interlock mechanism configured as described above, when the closing button 32 is pressed in the shut-off state shown in FIG. 5 , the button plate 31 swings counterclockwise on the support shaft 30. Due to the displacement of the pivot pin 34 accompanying this swinging, the double closing prevention plate 36 swings with the contact end with the closing lever 5 as a fulcrum against the spring force of the biasing spring 37. As a result, as shown in FIG. 6 , the other side of the double insertion preventing plate 36 comes into contact with the pin 35 and presses the pin 35 to oscillate the support metal 3. As a result, the input without the support of the trigger pin 10 is lost. The cam 1 rotates approximately half counterclockwise in the figure by the action of the spring force of the closing spring 21.
[0009]
The cam surface on the outer periphery of the closing cam 1 has a shape with a large diameter in the direction of rotation, whereby the tip of the closing lever 5 is pushed, and the contact 7 linked to the closing lever 5 is closed. . This throwing operation is also performed by applying a rotational force directly to the support 3.
[0010]
After such a closed state is obtained, when the further half turn the loading cam 1 by a predetermined driving device, as shown in FIG. 7, the rotation of the crank 20, the closing spring 21 in preparation for the next closing operation蓄At this time, the leading end of the closing lever 5 is kept in contact with the large diameter portion of the closing cam 1 and the contact 7 is kept closed.
[0011]
When the closing button 32 is pressed in this state, as described above, the pivot pin 34 is displaced according to the swing of the button plate 31, and the double closing prevention plate 36 is swung along with the displacement. , one side of the case double-up preventing plate 36 is in the state of being pulled by the spring force of the biasing spring 37 with loses support by the closing lever 5, as shown in FIG. 8, another double-up preventing plate 36 Since the side does not contact the pin 35 and the support 3 continues to contact the trigger pin 10 and the input cam 1 does not rotate, the operation of the input button 32 becomes invalid and double input is prevented. Can do.
[0012]
On the other hand, in the closing operation shown in FIG. 7 , the closing lever 5 is moved by the operation of the tripping mechanism 22 configured separately from the closing mechanism, and the tip of the releasing lever 5 is removed from the large-diameter portion of the closing cam 1. Thereafter, the state shown in FIGS. 5 and 6 is obtained, and the operation of the input button 32 becomes effective.
[0013]
[Problems to be solved by the invention]
As described above, in the conventional interlock device, the double closing prevention plate 36 that operates by pressing the closing button 32 is protruded from the support 3 by swinging with the closing lever 5 as a fulcrum in the shut-off state. In the closed state, on the other hand, it is necessary to prevent the pin 35 from coming into contact by swinging without using the closing lever 5 as a fulcrum. High shape accuracy is required for the parts related to the operation of the double-loading prevention plate 36 such as the support plate 3 including the pivot 3, the button plate 31 including the pivot pin 34, the closing lever 5, and the like. There is a problem that adjustment of the positional relationship between them is necessary, and a great deal of processing and assembly man-hours are required.
[0014]
The present invention has been made in view of such circumstances, and it is an object of the present invention to provide an interlock device that can reliably prevent double charging with a simple configuration that does not require high shape accuracy and positioning accuracy. Objective.
[0015]
[Means for Solving the Problems]
The interlock device of the opening / closing device operating mechanism according to the present invention includes a lock pin that is displaced according to the opening / closing of the contact and a leaf spring that moves together with the support of the closing cam according to the operation of the closing operation means. .
[0016]
In the present invention, when the contact is closed and the lock pin is in the lock position, the leaf spring is engaged with the lock pin, and the movement of the support metal by the operation of the closing operation means is performed by the leaf spring. Stop and prevent double throwing. Further, when the contact is open and the lock pin is in the unlocked state, the movement of the support metal by the operation of the input operation means occurs without being blocked by the leaf spring, and the input cam rotates along with the movement of the support metal. The displacement of the lock pin corresponding to the above is allowed by the elasticity of the leaf spring, and the closing operation is normally performed.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. Figure 1 is a perspective view showing the configuration of the interlock device of the switchgear operating mechanism according to the present onset bright, in the figure, the same parts that correspond to conventional interlock device shown in FIGS. 5 to 8 Reference numerals are attached.
[0022]
The interlock device according to the present invention includes a closing cam 1 that is rotatably supported by a shaft 2 and a closing lever 5 that is linked to a contact 7, as in the conventional interlock device. An accumulator gear 11 is coaxially fitted to the shaft 2 that supports the closing cam 1, and a trigger pin 10 protrudes from one surface of the accumulator gear 11 at a position eccentric from the shaft 2. . On the other side of the accumulator gear 11, a crank pin (not shown) is also provided at a position that is also eccentric from the shaft 2, and between the accumulator rod 23 whose end is connected to the crank pin and an appropriate fixed position. A closing spring 21 is interposed.
[0023]
The closing spring 21 is in a state of being compressed by the storing rod 23 when the accumulating gear 11 and the closing cam 1 are in the rotational position shown in the drawing, and the storing gear 11 and the closing cam 1 are moved from the closing cam 1 side. The accumulating state is stored so as to rotate clockwise as viewed, and this accumulating state is maintained by engaging the trigger pin 10 with the tip of the support 3 to restrict the rotation of the accumulating gear 11 and the closing cam 1. I'm leaning.
[0024]
The base portion of the support metal 3 is rotatably supported at a position close to the energy storage gear 11 by a support shaft 30 that is installed in parallel with the input cam 1 and the shaft 2 of the energy storage gear 1. The insertion button 32 for manual insertion operation faces the extension 3a of the support 3 that extends upward from the base, and the support 3 swings about the support shaft 30 by the pressing operation. Then, by stopping this pressing operation, the original position is restored by the spring force of the return spring 33. In this figure, the return spring 33 is a helical spring whose middle is fitted and held on the support shaft 30, but other types of springs such as a coil spring can also be used.
[0025]
A plate spring 4 is supported on the support shaft 30 together with the support metal 3. As shown in the figure, the leaf spring 4 has a thickness direction in which it can be elastically deformed as an axial length direction of the support shaft 30, and is supported by the support shaft 30 so as to swing together with the support 3. . A protrusion 40 is formed at the lower end of the leaf spring 4 so as to protrude toward the lock pin 61, which will be described later, by bending in the thickness direction.
[0026]
On the other hand, the closing lever 5 is supported by a swinging shaft 50 parallel to the shaft 2 and the support shaft 30 so as to be swingable, and is disposed at a lower position of the closing cam 1, and one end thereof is illustrated. It is connected to the contact 7 via a link mechanism that does not.
[0027]
Between the closing lever 5 and the closing cam 1, an output lever 6 that is swingably supported by a swing shaft 60 that is parallel to the swing shaft 50 is disposed. The output lever 6 has a substantially triangular planar shape, and the vicinity of one apex thereof is pivotally supported by the swing shaft 60. Near the other two apexes of the output lever 6, a lock pin 61 and an output pin 62 are respectively driven, and the other end of the closing lever 5 is connected to the output pin 62 via a connecting rod 51. Has been.
[0028]
A roller 63 that is in rolling contact with the outer cam surface of the closing cam 1 is pivotally supported on the side between the swing shaft 60 and the lock pin 61 of the output lever 6. 5 is pushed upward via the connecting rod 51 and pressed against the cam surface of the closing cam 1 by the spring force of the pressing spring 52 interposed between the other end portion side of 5 and an appropriate fixing portion. It has become.
[0029]
The lock pin 61 extends from one surface of the output lever 6 toward the accumulator gear 11, and the tip of the lock pin 61 faces the hanging position of the leaf spring 4. Further, the lock pin 61 is engaged with the lower end portion of the latch 8 supported at the upper portion thereof by the support shaft 30 common to the support metal 3, and this engagement is performed by pressing the shut-off button 82. It is released by swinging the latch 8 about 30.
[0030]
FIG. 1 shows a closing accumulation state in which the contact 7 is closed and the closing spring 21 is stored in preparation for the next closing. At this time, the closing cam 1 is connected to the trigger pin 10 of the storing gear 11. The output lever 6 is constrained to the swing position shown in the figure by the action of the latch 8 engaged with the lock pin 61 by the action of the engaging support 3 and the output lever 6 is output. The roller 63 pivotally supported by the lever 6 is opposed to the small diameter portion of the closing cam 1 at a position separated by an appropriate length.
[0031]
The contact 7 is cut off by pressing the cut-off button 82 in this state, swinging the latch 8 counterclockwise, and releasing the engagement with the lock pin 61. That is, the output lever 6 that has become swingable due to the disengagement of the engagement causes the swing shaft 60 to be moved by the output pin 62 being pushed upward via the connecting rod 51 by the spring force of the push spring 52. It swings clockwise as the center, and this swing raises the same end of the closing lever 5 via the connecting rod 51 and lowers the other end, and the contact 7 is cut off by the action of this pulling force. Will be.
[0032]
At this time, since the engagement state between the support 3 and the trigger pin 10 is maintained unchanged, the closing cam 1 maintains the rotation position shown in the figure, and the swing of the output lever 6 is supported by the roller 63 supported by this. Is restrained at a position pressed against the small diameter portion of the closing cam 1.
[0033]
In this state, the contact 7 is inserted by operating the input button 32, pressing the extension 3a to swing the support 3 counterclockwise, and releasing the engagement with the trigger pin 10. . That is, the accumulator gear 11 that has lost its support due to the release of the engagement is rotated clockwise together with the closing cam 1 supported by the common shaft 2 by the spring force of the closing spring 21 acting via the energy storing rod 23. Since the cam surface of the closing cam 1 has a shape having a large diameter in this rotation direction, the roller 63 that is in rolling contact with the cam surface is pushed downward, and the output lever 6 is rotated counterclockwise. By swinging, the same end portion of the closing lever 5 is pushed down through the connecting rod 51, the other end portion is pushed up, and the contact 7 is inserted by the action of this lifting force. .
[0034]
Thereafter, the accumulator gear 11 is further rotated halfway by transmission from an accumulator motor (not shown), and the closing spring 21 is compressed by the downward movement of the accumulator rod 23, while the support 3 is engaged with the trigger pin 10. Thus, by restricting the rotation of the energy storage gear 11, an input energy storage state as shown in FIG. 1 is obtained. At this time, the swinging position of the output lever 6 is restrained by the engagement between the rod pin 61 and the latch 8, so that the contact 7 is kept closed.
[0035]
In the closing and closing operations of the contact 7 performed as described above, the output lever 6 swings according to the opening and closing of the contact 7, and when the contact 7 is in a closed state, the output lever 6 is in the swinging position shown in FIG. When 7 is in the open circuit state, the swing position is rotated clockwise by a predetermined angle from the state of FIG. Accordingly, the lock pin 61 driven on the output lever 6 has a lock position shown in FIG. 1 and a non-lock position higher than the lock position shown in FIG. It is displaced between. In the present invention, the interlock operation for preventing double closing is performed as follows by the displacement of the lock pin 61 thus generated and the leaf spring 4 facing the tip of the lock pin 61. .
[0036]
2, 3 and 4 are explanatory diagrams of the operation of the interlock device constructed as described above. These left half parts are arrow views from the direction A in FIG. 1, and the right half parts are also arrow views from the direction B in FIG. 3, only the parts related to the interlock operation such as the leaf spring 4 and the output lever 6 are shown, and the support frame and the closing button 32 are indicated by a two-dot chain line, and the rotational position of the closing cam 1 is a support metal. The trigger pin 10 that engages 3 is represented by an illustration, and the support 3, the leaf spring 4, and the output lever 6 are shown close to each other in the axial length direction.
[0037]
FIG. 2 shows a state in which the output lever 6 and the lock pin 61 are in the unlocked position, and at this time, the contact 7 is in an open circuit state. The protruding length of the lock pin 61 is set so as to abut against the protrusion 40 provided at the lower end of the leaf spring 4 and not to contact the other part. The tip is above the protrusion 40 and is not in contact with the leaf spring 4.
[0038]
When the closing button 32 is pressed in this state, the support 3 swings clockwise together with the leaf spring 4 against the spring force of the return spring 33 due to the pushing of the extension 3a. As shown in FIG. 3, the support 3 and the trigger pin 10 are disengaged, the closing cam 1 rotates as indicated by an arrow in the drawing, and the output lever 6 swings as described above. The contact 7 is turned on by this swing. That is, when the contact 7 is in the open state, the operation of the closing button 32 is effective, and the contact 7 can be inserted by this operation.
[0039]
At this time, the lock pin 61 is displaced to a lock position below the non-lock position as the output lever 6 swings. The protrusion 40 at the lower end of the leaf spring 4 is formed by aligning the upper and lower positions in the vicinity of the lock position. The lock pin 61 displaced to the lock position abuts on the protrusion 40. Since the leaf spring 4 is bent and deformed as shown in FIG. 3, the displacement is not hindered.
[0040]
When the pressing of the closing button 32 is stopped in this state, the leaf spring 4 swings counterclockwise together with the support 3 by the spring force of the return spring 33 and returns to the original position, while the lock pin 61 In order to maintain the position, the protruding portion 40 at the lower end of the leaf spring 4 slides along the tip of the lock pin 61 and comes off from the tip, and as shown in FIG. One edge in the width direction is close to the lock pin 61 from the side surface, and this state continues until the lock pin 61 is displaced to the unlocked position, in other words, until the contact 7 is cut off.
[0041]
FIG. 4 shows this state, and when the closing button 32 is pressed in this state, the support metal 3 tries to swing together with the leaf spring 4 as described above. As shown by the arrows in FIG. 4, the side edges of the leaf spring 4 abut against the lock pin 61. Since the leaf spring 4 does not have elasticity in the direction of the collision, the oscillation is prevented. In this state, further pressing of the input button 32 becomes impossible.
[0042]
In this way, when the closing button 32 is operated when the contact 7 is already in the closed state, the lock pin 61 and the leaf spring 4 in the locked position come into contact with each other from a direction different from the direction of elasticity of the leaf spring 4. As a result, the operation of the closing button 32 itself becomes impossible, the swinging of the support 3 does not occur, and the engagement state with the trigger pin 10 is maintained, so that double insertion can be reliably prevented.
[0043]
In the above embodiment, the interlock operation for preventing double closing is performed by the synergistic action of the leaf spring 4 that swings together with the support metal 3 and the lock pin 61 that is displaced according to the opening and closing of the contact 7. It is. The plate spring 4 and the lock pin 61 do not require high shape accuracy, and between them, as shown in FIG. 4, the plate spring 4 is in a state where the former returns to the original shape and the latter is in the locked position. Only a rough positioning is required so that the side edges of 4 are close to the side surface of the lock pin 61, and double insertion can be reliably prevented with a simple configuration.
[0056]
【The invention's effect】
As described in detail above, in the interlock device of the switchgear operating mechanism according to the present invention, the lock pin that is displaced according to the opening and closing of the contact, the leaf spring that moves together with the support cam of the closing cam according to the operation of the closing operation means, Because of these synergistic effects, the structure that restrains the movement of the support metal during closing of the contacts is performed, so the double structure is reliably prevented with a simple structure that does not require high shape accuracy and positioning accuracy. The present invention has an excellent effect, for example .
[Brief description of the drawings]
1 is a perspective view showing the configuration of the interlock device of the switchgear operating mechanism according to the present onset bright.
FIG. 2 is an operation explanatory diagram of the interlock device shown in FIG. 1;
FIG. 3 is an operation explanatory diagram of the interlock device shown in FIG. 1;
4 is an operation explanatory diagram of the interlock device shown in FIG. 1. FIG.
FIG. 5 is an operation explanatory diagram of a conventional interlock device.
FIG. 6 is an operation explanatory diagram of a conventional interlock device.
FIG. 7 is an operation explanatory diagram of a conventional interlock device.
FIG. 8 is an operation explanatory diagram of a conventional interlock device .
[Explanation of symbols]
1 Input cam, 3 Supporter, 4 Leaf spring, 6 Output lever, 7 Contact , 10 Trigger pin, 32 Input button, 40 Projection, 61 Lock pin.

Claims (1)

  A lock pin that displaces according to the rotation of the closing cam between the locked position when the contact is in the closed state and the unlocked position when the contact is in the open state, and a support that restrains the closing cam in the charged and accumulated state. In the first position after the movement, the gold, the movement of the support according to the operation thereof, the input operation means for releasing the restraint, and the movement of the support according to the operation of the input operation means. A plate spring that allows displacement of the lock pin by its elasticity and engages with the lock pin at the lock position to restrain movement of the support metal at the second position returned from the first position; An interlocking device for an opening / closing device operating mechanism.

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