JPS6140033Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manual opening/closing mechanism for a switch which can be operated both automatically by an electromagnetic solenoid and manually by a manual handle.

Conventionally, in this type of manual opening/closing mechanism, when the automatic opening/closing mechanism closes the circuit, the movable electrode is not operated even if the manual opening/closing operation is performed. Even if the movable electrode cannot automatically return to the open state, such as when some parts are welded or the sliding part of the movable electrode stops moving for some reason, the manual opening/closing mechanism will not allow it to be forcibly removed, and it will remain in the closed state. There was a fear that this would happen.

The purpose of this invention is to provide an opening/closing system that allows forced removal by manual operation when the movable electrode is unable to automatically return to open circuit, such as when the electrode melts during automatic closing and the cause is relatively minor. The objective is to provide a manual opening/closing mechanism for the device.

Hereinafter, the first embodiment embodying the present invention will be described as follows.
Referring to FIG. 5, reference numeral 1 is the main case of the switch, and fixed electrodes (not shown) on the power supply side and the load side are arranged facing each other between the left and right walls of the main case for each phase. Reference numeral 2 denotes a pair of support members supported so as to be movable left and right on a pair of rails (not shown) fixed to the front and rear inner walls of the main case 1, respectively. movable electrodes (not shown) for each phase via
The location is fixed.

Next, the opening/closing device for opening and closing the support member 2 by moving it left and right will be explained. Reference numeral 3 denotes an auxiliary case fixed to the front surface of the main case 1;
is an electromagnetic solenoid mounted on the front of the main case 1 so as to be located at the lower left side of the case 3. In the demagnetized state, the movable iron core 5 retracts to the left position as shown in Fig. 1. In the energized state, the movable iron core 5 projects to the right as shown in FIG.

Reference numeral 6 denotes a first lever whose base end is rotatably supported with respect to a support shaft 7 disposed at the lower right side inside the auxiliary case 3; its central portion and the tip of the movable iron core 5 of the electromagnetic solenoid 4 Between the first moving link 8
are swingably connected by a connecting pin 9.

Reference numeral 10 denotes an operating shaft which is rotatably supported on the front surface of the main case 1 so as to be located at the upper right side of the auxiliary case 3, and whose rear end protrudes into the main case 1. 11 is an automatic side first driven lever whose base end is fixed to the operating shaft 10 so as to be located inside the auxiliary case 3; 12 is a connecting pin between the first lever and the distal end portions of the first driven levers 6 and 11; 13
This is a second interlocking link which is swingably connected to each other, and an adjusting bolt 14 and a double nut 15 are interposed in the middle part thereof, so that the length can be adjusted.

Reference numeral 16 denotes an actuation lever whose base end is fixed to the end of the actuation shaft 10 so as to be disposed close to the inner surface of the front side wall of the main case 1, and 17 refers to the central part of the support member 2 and the tip of the actuation lever 16. Connecting pin 18 between the parts
This is a third interlocking link which is swingably connected to each other, and an adjusting bolt 19 and a double nut 20 are interposed in the middle part thereof, so that the length can be adjusted. Reference numeral 21 denotes a tension spring suspended between a locking pin 22 fixed to the inner surface of the front side wall of the main case 1 and the intermediate portion of the operating lever 16.
6 clockwise around the operating axis 10 in Figure 1 (open circuit)
It's pushing in the direction.

Next, a description will be given of a manual operation mechanism for manually rotating the operating shaft 10 to open and close the movable electrode (not shown).
Reference numeral 3 denotes an operating shaft rotatably supported between the front side walls of the main case 1 and the auxiliary case 3 so as to be located above the center of the auxiliary case 3, and the shaft end protrudes forward of the auxiliary case 3. An operating handle (not shown) is attached to the section. Reference numeral 24 is an operating lever whose central portion is fixed to the operating shaft 23 so as to be located inside the auxiliary case 3. Connecting pins 25 and 26 are attached to both ends of the operating lever. Reference numeral 27 denotes a second driven lever on the manual side in the form of a fork whose base end is fixed to the operating shaft 10 so as to correspond to the operating lever 24, and a connecting pin 28 is attached to the distal end thereof. . 29 is a pair of interlocking links whose one end is rotatably attached to the connecting pin 26 at the tip of the operating lever 24, as shown in FIG.
A long hole 30 is formed at the other end of the second driven lever 27 so as to be slidably and rotatably connected to the connecting pin 28 at the tip of the second driven lever 27.

31 is a second
As shown in the figure, the first cam surface 32 formed in an arc shape is a second cam surface formed in an arc shape continuously from the first cam surface 31, and the distance from the connecting pin 26 is It is made smaller than one cam surface 31.
Reference numeral 33 denotes a locking lever rotatably mounted on a shaft 34 between the pair of interlocking links 29, with a contact piece 35 protruding from one end slidingly contacting the first cam surface 31, and a contact piece 35 projecting from one end slidingly contacting the first cam surface 31; A locking hook 36 corresponding to the connecting pin 28 of the two driven levers 27 is formed. 37 has both ends locked to the upper side parts of the pair of interlocking links 29, the middle part wrapped around the shaft 34 for supporting the locking lever, and the lower end secured to the locking lever 3.
3, which urges the locking lever 33 in the counterclockwise direction in FIGS. 1 and 2 (towards the connecting pin 28) about the shaft 34.

38 is a reversing lever whose base end is rotatably attached to the front surface of the main case 1 by a support shaft 39 so as to be located at the upper left side inside the auxiliary case 3; A recess 38a is formed, and the distal end thereof is rotatably connected to the connecting pin 25 at the distal end of the operating lever 24. Reference numeral 40 denotes a spring wound around the outer periphery of the reversing lever 38, one end of which is hooked to the support shaft 39 via a spring receiver 41, and the other end is engaged with the tip of the reversing lever 38 via a spring receiver 42. It is latched to a stop portion 43.

Next, the operation of the switch constructed as described above will be explained.

Now, in FIG. 1, the electromagnetic solenoid 4 is demagnetized, the operating handle (not shown) is rotated to the open position, and the support member 2 of the movable electrode (not shown) is moved to the left position by the elasticity of the tension spring 21. This figure shows an open circuit state in which the movable electrodes of each phase are separated from the fixed electrodes (not shown). In this open state, when the electromagnetic solenoid 4 is energized and the movable iron core 5 is projected to the right in FIG. This rotation of the first lever 6 causes the first driven lever 11 to rotate in the counterclockwise direction in the figure about the actuation shaft 10 via the second interlocking link 12. The rotation of the lever 16 causes the operating lever 16 to rotate in the same direction, and the rotation of the lever 16 moves the support member 2 to the right in FIG. 1 via the third interlocking link 17. The movable electrode supported by the fixed electrode is inserted into the fixed electrode to close the circuit.

As shown in FIG. 3, until the automatic closing operation by the electromagnetic solenoid 4 is completed, the second driven lever 27 on the manual side fixed to the operating shaft 10 also rotates counterclockwise in FIG. However, since the connecting pin 28 at the tip of the lever 27 slides in the elongated hole 30 of the interlocking link 29, the interlocking link 29 is only slightly rotated around the connecting pin 26, and the operating lever is rotated. 24 remains stopped in the open position.

Now, in order to open the circuit in the automatic closing state shown in FIG. 3, when the electromagnetic solenoid is demagnetized, the operating lever 16 is rotated in the clockwise direction in FIG. 3 about the operating shaft 10 by the elasticity of the tension spring 21. The entire automatic opening/closing mechanism is returned to the open position shown in FIG. 1 by an action completely opposite to the circuit closing action.

However, in the automatic closing state shown in FIG. 3, abnormalities such as welding of the movable electrode to the fixed electrode or failure of the sliding part of the movable electrode occur.
If the elasticity of the tension spring 21 alone does not allow the movable electrode to separate from the fixed electrode and open the circuit, the manual opening/closing mechanism forcibly opens the circuit. That is, the operating shaft 23 is controlled by the operating handle (not shown).
When the control lever 24 is rotated in the clockwise direction in FIG. Point) When moved upward beyond A-A, a large clockwise rotational force is applied to the operating lever 24 by the stored force of the spring 40. When the operating lever 24 is rotated in this manner, the interlocking link 29 is rotated about the connecting pin 26 at the right end of the lever 24 and swung to the right, resulting in the closed state shown in FIG. 4.

In this closed state, the connecting pin 25 of the operating lever 24 is moved slightly below the straight line (dead center) B-B connecting the operating shaft 23 and the connecting pin 28.

In the first half of the swinging motion of the interlocking link 29, the contact piece 35 of the locking lever 33 is moved to the second cam surface 32 while being in sliding contact with the first cam 31, and is moved from the first cam surface 31 to the second cam surface 32. When moving to contact piece 3
5 is moved toward the center of the connecting pin 26, and the locking lever 33 is rotated counterclockwise in FIG. When the lever 33 moves along the connecting pin 28 at the tip of the second driven lever 27, the locking hook 36 of the lever 33 is moved to a position where it can lock the connecting pin 28 at the tip of the second driven lever 27. When the operating lever 24 is further rotated and the end of the elongated hole 30 on the locking lever 33 side comes into contact with the connecting pin 28 at the tip of the second driven lever 27 as shown in FIG. Now, when the operation handle (not shown) is rotated in the opposite direction and the operation shaft 23 is rotated counterclockwise in the figure, the interlocking link 29 is moved to the left via the operation lever 24. Since the second driven lever 27 is stopped at the closed circuit position,
The locking hook 36 of the locking lever 33 is locked to the connecting pin 28 at the tip of the second driven lever 27, and by the operation of the interlocking link 29, the connecting pin 28 is moved together with the second driven lever 27 to the operating shaft 10 via the locking lever 33.
It is rotated clockwise in Fig. 4 around . Therefore, even if an abnormality such as a melting accident occurs between the movable electrode and the fixed electrode and it is not possible to automatically remove both electrodes, the circuit is forcibly returned to the closed state by the manual operation mechanism from the outside.

By the way, when the contact piece 35 of the locking lever 33 moves from the first cam 31 to the second cam 32, the locking hook 36 is moved to a position where it is locked to the connecting link 28 at the tip of the second driven lever 27. However, the first and second cams 31,
32 positions have been determined. Therefore, when the manual operation mechanism is operated to close the circuit in FIG. 3 (fully closed state) where the movable electrode and the fixed electrode are in the closed circuit state,
Before the locking hook 36 of the locking lever 33 passes the connecting pin 28 of the second driven lever 27, it is moved to the elongated hole 30 position, and when the interlocking link 29 is further moved, the locking hook 36 of the locking lever 33 is moved. It is brought into contact with the connecting pin 28. At this time, the locking hook 36
Since the slope 36a formed in
It is rotated about the shaft 34 in a direction away from the connecting pin 28 against the elastic force of the connecting pin 28 . When the locking hook 36 passes over the connecting pin 28, the locking lever 33 is moved toward the connecting pin 28 again by the elasticity of the spring 37, and the locking hook 36 is moved to a position where it can lock the connecting pin 28. It is.

Next, when the circuit is closed from the open state shown in FIG. 1 by the manual opening/closing operation mechanism, the operating handle (not shown) is rotated toward the closing side, and the operating shaft 23 and the operating lever 24 are rotated clockwise in the figure. Rotate to.
Then, the interlocking link 29, the second driven lever 27,
The support member 2 is moved to the right via the operating shaft 10, the operating lever 16, and the third interlocking link 17, and the movable electrode is inserted into the fixed electrode to close the circuit. Note that at this time, the rotation of the operating shaft 10 causes the first driven lever 1 to
1, the second interlocking link 12, the first lever 6, the first interlocking link 8, and the movable iron core 5 are also moved to the closed circuit positions shown in FIG. 4, respectively.

In the case of a circuit closing operation using the manual operation mechanism, the connecting pin 28 of the second driven lever 27 is in contact with the end of the elongated hole 30 on the locking lever 33 side, so that the locking lever 33 is rotated around the shaft 34. When the locking hook 36 is rotated, the locking hook 36 is moved to the position where it locks the connecting pin 28 from the beginning, so that the slope 3 of the locking hook 36
6a does not move beyond the connecting pin 28.
In addition, even if an abnormality occurs in this manual closing state and the movable electrode cannot automatically return from the fixed electrode, the operation lever 24 can be opened using the operation handle as described above.
When the electrode is rotated to the open position, the locking hook 36 of the locking lever 33 is locked to the connecting pin 28, and both electrodes are forcibly pulled out.

In this way, in the first embodiment, both the operating levers 24 and 27 are configured so that the rotation of the operating lever 24 is transmitted to the second driven lever 27, and the second driven lever 27 can freely rotate when the manual opening/closing mechanism is activated. lever 24,
Interlocking link 2 having a long hole 30 connected between 27 and 27
A locking lever 33 is rotatably attached to a shaft 34 on one side of the locking lever 33, and a contact piece 35 is formed at one end of the locking lever 33 to connect the first and second cam surfaces 31, 3 of the operating lever 24.
2, and a locking hook 36 is formed on the other end of the second driven lever 27, which is slidably and rotatably attached to the elongated hole 30 of the interlocking link 29. Since the locking hook 36 is configured so that it can be locked between the fully closed state and the time when the movable electrode and the fixed electrode are separated from each other, there is no possibility that both electrodes may not be automatically opened due to an accident and the coil of the electromagnetic solenoid may be burnt out. Even in such cases, it can be reliably removed using the manual operating mechanism.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 and 7.

This second embodiment is implemented in a switch in which a movable electrode and a fixed electrode are arranged vertically, and only the power transmission link mechanism between the operating shaft 10 and the movable electrode is the same as in the first embodiment. different from the structure. Therefore, each member having the same function as in the first embodiment is designated by the same reference numeral as in the first embodiment, and hereinafter,
Only the different parts will be briefly explained.

44 is a drive shaft rotatably supported in the upper part of the main case at the rear of the auxiliary case 3;
A driven lever 45 is fixed on the side of the auxiliary case 3 on the auxiliary case 3, and a link mechanism (not shown) for reciprocating the movable electrode is articulated. 46
Reference numeral 47 indicates a drive lever fixed to the main case side end of the operating shaft 10, and 47 indicates a fourth interlocking member swingably connected by a connecting pin 48 between the tip of the drive lever 46 and the tip of the driven lever 45. It's a link.

Therefore, when the actuation shaft 10 is rotated automatically or manually, the rotation is transmitted to the drive shaft 4 via the drive lever 46, the fourth interlocking link 47, and the driven lever 45.
4, and the movable electrode is opened and closed via a link mechanism (not shown) provided inside the main case. Note that FIG. 7 shows a state in which the movable electrode is turned on when the operating shaft 23 is manually rotated.

Further, the present invention is not limited to the above-mentioned embodiments, but the following embodiments can also be implemented.

(A) In the above embodiment, the connecting pin 28 of the second driven lever 27 is engaged with the long hole 30 of the interlocking link 29, but this long hole 30 is provided on the connecting pin 26 side of the operating lever 24, although not shown. , attach the locking lever 33 in the opposite direction. In this case, the operating lever 24 rotates and its connecting pin 2
6 starts to push the interlocking link 29 while it is locked to the end of the connecting pin 28 side of the elongated hole 30.
The locking lever 33 is connected to the connecting pin 26.
The locking hook 36 is rotated only after it is moved to the position where it is locked by the locking hook 36, and therefore, the locking hook 36 does not move beyond the connecting pin 28 as in the previous embodiment.

(b) The first lever is rotated so that the locking lever 33 is rotated to a position where it can be locked to the connecting pin 28 of the second driven lever 27 immediately after the operating lever 24 is rotated and the interlocking link 29 starts pushing. , second cam 31, 32
to be set.

As detailed above, in the present invention, the actuating shaft that operates the movable electrode is interlocked via an automatic side driven lever that is interlocked with an electromagnetic solenoid and an interlocking link that allows a slight movement of the manual operation lever. By providing a driven lever on the manual side and a locking means that locks the above-mentioned free movement and positively rotates the operating shaft toward the open side during manual opening/closing operations, it is possible to prevent the movable electrode and the fixed electrode from melting in the closed state. To ensure that a manual opening/closing mechanism operates the movable electrode to open the circuit by applying a locking means when an abnormality occurs in which the sliding part of the movable electrode does not move for some reason and automatic opening operation cannot be performed. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a front view in an open state showing the internal configuration of the auxiliary case of the first embodiment embodying the present invention;
The figure is also an enlarged exploded perspective view of the main parts, and Figure 3 is the 1st
Fig. 4 is a front view of the manual opening/closing operation mechanism shown in Fig. 3 in the closed state, Fig. 5 is an enlarged front view of the main parts in the closed state, and Fig. 6 is a front view of the manual opening/closing mechanism of the present invention in the closed state. FIG. 7 is a front view of the second embodiment showing the inside of the auxiliary case in an open state, and FIG. 7 is a front view of the inside of the auxiliary case in a closed state. First driven lever 11, operating lever 24, connecting pins 26, 28, second driven lever 27, interlocking link 29, long hole 30, first cam 31, second cam 32,
A locking lever 33, a contact piece 35, and a locking hook 36.

Claims (1)

[Claims for Utility Model Registration] 1. The actuating shaft that operates the movable electrode is interlocked with an automatic side driven lever that is interlocked with an electromagnetic solenoid, and an interlocking link that allows a slight movement of the manual operation lever. 1. A manual opening/closing mechanism for a switch, characterized in that a manual side driven lever is provided, and locking means is provided for locking the floating operation and positively rotating an operating shaft toward the opening side when a manual opening operation is performed. 2. The interlocking link is provided with a long hole for rotatably and slidably engaging the connecting pin attached to the tip of the manual side driven lever to allow free movement, and the locking means is rotatably attached to the interlocking link. a locking lever having a locking hook that is removably attached and capable of locking on the connecting pin; a cam configured to push a contact piece of the locking hook against a manually operated operating lever; , and biasing means configured to bias the locking hook toward the connecting pin. The manual opening/closing mechanism for a switch according to claim 1, which is a registered utility model. 3. The manual opening/closing mechanism for a switch according to claim 2, wherein the period during which the locking hook of the locking lever can be locked to the connecting pin is the entire period during which the movable electrode is inserted into the fixed electrode.