JPS6136058Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operating mechanism for a circuit or disconnector equipped with a toggle mechanism for opening and closing, and in particular is an improvement in the rotation restraint device for a rotating member.

Conventionally, an operating mechanism for a circuit or disconnector equipped with a toggle mechanism is configured as shown in FIGS. 1A and 1B, for example. Here, FIG. 1A shows the open state of the poles. Reference numeral 1 designates a latch, and as can be seen from FIG. 1B, this latch 1 is formed of a single plate in the form of a flat plate that is pressed out. Reference numeral 2 denotes a rotation shaft to which the latch 1 is fitted, and is pivotally supported by a support frame 4 attached to the case 3. A spline-shaped groove 2A is carved in the approximate center of the rotation shaft 2 (see Fig. 1B), and the rotation shaft is inserted into the shaft hole of the latch 1, which is finished with dimensional accuracy commensurate with the outer diameter of this groove 2A. By press-fitting the moving shaft 2, the latch 1 is attached to the rotating shaft 2.
It is firmly fixed to the surface and maintains a certain degree of perpendicularity.

Further, an engagement surface 1A is formed on the upper end surface of the latch 1 on the side of the tripping section 5, and the engagement surface 1A is attached to a lever 6 that is operated by the link mechanism of the tripping section 5. so as to engage the pin 7. 8 is a movable contact, 9 is a switch attached to a rotating shaft 10, and this rotating shaft 10 is connected to the case 3.
It is pivoted on. Further, the movable contact 8 and the switch 9 are connected by a pin 11. 12 is a first toggle link consisting of two flat plates of the same shape with bifurcated ends (see FIG. 1B); 1;
3 is a second toggle link having two legs, 14
are two opening/closing springs, which constitute a toggle link mechanism that performs opening/closing operations.
That is, as shown in FIGS. 1A and B, the second
One end of the toggle link 13 is connected to the switch 9 via a pin 15, and the other end is connected to one end of the first toggle link 12 via a pivot pin 16. On the other hand, pivot pins 17 are protruded from both sides of the latch 1 fitted onto the rotation shaft 2.
The upper end of the first toggle link 12, which is made of a flat plate, is pivotally supported on this pivot pin 17. Also,
18 is the handle, 19 is the handle lever, 19A
2 is a pivot leg, and as shown in FIGS. 2A and 2B, the pivot leg 19A is fitted between the pivot portion 4 of the frame 4A and the partition wall 3A provided on the case 3.

The handle lever 19 is formed with a latching portion 20 that latches the end of the opening/closing spring 14 . Also, among the pins 16 provided on the second toggle link 13 , one of the pins 16 protrudes from both sides of the second toggle link 13 . A latching portion 16' for latching the end of the opening/closing spring 14 is formed at this portion. The two opening/closing springs 14 are each hooked on the outside of the second toggle link 13 at one end to a hook 20 and at the other end to a hook 16'.
This constitutes a toggle link mechanism in the operating mechanism. Additionally, the handle 18 shown in FIG.
In the closed state, the handle lever 19 is
It is biased counterclockwise around the pivoting leg 19A as a fulcrum by the spring force of the opening/closing spring 14, and as shown in FIG. . In Figure 1A,
21 is a locking pin attached to the frame 4, and the locking pin 21 is connected to the shaft 2 when the latch 1 is released.
When the latch 1 rotates counterclockwise around the latch 1, the restraining surface 1B of the latch 1 comes into contact and its rotation is inhibited, and when the latch opens, the movable contact 8 rotates clockwise and opens the contact. The rotation is inhibited by contact.

In the operating mechanism configured in this way,
Let's explain its operation. For example, when an overcurrent flows through the tripping section 5, the engaging surface 1A of the latch 1 is released from the locking pin 6 due to the tripping operation of the tripping section 5, and the latch 1 is opened by the spring force of the opening/closing spring 14. Rotate counterclockwise around rotation axis 2, and latch 1.
When the restraining surface 1B comes into contact with the pin 21, its rotation stops. Due to this rotation of the latch 1, the line of action of the opening/closing spring 14 (the center line of the coil spring 14) shifts from the dead center of the toggle link mechanism, that is, from the left to the right of the pin 17, which upsets the balance of the toggle link mechanism and causes the opening/closing The second toggle link 13 is rapidly pulled upward by the spring force of the spring 14. Therefore, the switch 9 connected to the second toggle link 13 and the switch 9
The movable contact 8 connected to the holder is rotated clockwise around the rotation shaft 10 to complete the circuit opening operation. 1A shows the closed state of the pole, and the line of action of the opening/closing spring 14 is on the left side of the pin 17. From this state, the opening/closing handle 18 can be rotated clockwise to disconnect the When the is turned off, the opening/closing spring 1
The line of action of 4 shifts to the right side of pin 17, causing the toggle link mechanism to become unbalanced as described above.
The movable contact 8 rotates clockwise around the rotation axis 10 to complete the manual opening operation.

However, in such a conventional operating mechanism, when the circuit is interrupted, the latch 1 moves to the pivot shaft 2.
A locking pin 21 is pivotally supported on the frame 4 as a stopper when rotating counterclockwise around the frame 4. Moreover, when the handle 18 is turned on, the balance of the toggle link mechanism is lost due to the operation of the handle 18, and the handle lever 19 is moved to its pivot leg 19.
The handle lever 19 rotates counterclockwise around A, and a restraining portion 4B is formed in the frame 4 as a stopper for the handle lever 19. As described above, the rotation inhibiting stopper of the latch 1 and the rotation inhibiting stopper of the handle lever 19 are each formed of separate members, which requires a large number of parts and is difficult to assemble.

In view of the above points, the present invention reduces the number of parts by providing a restraining part on the support frame that combines the rotation restraining part of the handle lever when the handle is inserted and the rotation restraining part of the latch when the handle is tripped. The object of the present invention is to provide an inexpensive operating mechanism for circuits and disconnectors that is easy to assemble by reducing the amount of noise.

In order to achieve this purpose, the present invention
A first toggle link is rotatably connected to a latch rotatably supported on a support frame via a pivot shaft, and a second toggle link is connected to the first toggle link via a first pin.
Connect the toggle links and connect the second toggle link to the second
A spring is stretched between the first pin and the handle lever, which is connected to a movable contact via a pin and rotatably supported on a support frame, and when the handle is inserted, the handle lever is rotated by the spring force of the spring. In the operating mechanism of a circuit or disconnector, the latches are held in parallel with each other, and the rotational movement of the latch due to the spring force of the spring is suppressed in contact with the frame when the latch is tripped. a connecting part connecting the parallel parts, an engaging part formed by bending the front edge of the parallel part outward, a connecting part formed in the parallel part and connecting the first toggle link, The first toggle link includes a link parallel part corresponding to the parallel part of the latch, and a link connection provided in the link parallel part and connected to the connecting part of the latch. a pivot portion provided on the link parallel portion and pivotally supported by the connecting pin of the second toggle link, and a connecting portion connecting the link parallel portions, and the support frame includes the mutually parallel parallel portions and the parallel portion. A shaft support hole formed in the hole for pivotally supporting the rotating shaft of the latch, a locking part formed by bending outward from the upper edge of the parallel part, and a pivot part projecting outward from the parallel part. The handle lever includes parallel parts that are parallel to each other, a connection part that connects the parallel parts at the top, and a leg part that is formed at the bottom of the parallel part and is pivoted to the pivot part of the support frame, and when the handle is inserted, the handle lever The front edge of the parallel portion of the lever abuts against the locking portion of the support frame and is restrained, and when tripping, the engaging portion of the latch abuts against the locking portion of the support frame and is restrained. It is something.

The present invention will be explained below based on the drawings. In the following, parts similar to those in FIG. 1 are designated by the same reference numerals, and description thereof will be omitted.

FIG. 3 shows an example of the present invention, where 31 is a support frame fixed to the case 3, 41 is a latch rotatably attached to a rotation shaft 100 supported by the frame 31; 51 is latch 3
The first toggle link 61, which is rotatably supported on the first pivot parts 47A and 47B, is connected to the first toggle link 51 via the connecting pin 16, and the movable contact 8 and A second toggle link 71 connected to the switch 9 is a pivot projection 36 projecting from both sides of the frame 31.
Rotating legs 73A, 73 are attached to A, 36B (see Fig. 4).
The handle lever B (see Fig. 4) is fitted, and 102 is an opening/closing spring connecting the handle lever 71 and the connecting pin 16, and these members constitute an opening/closing mechanism having a toggle link mechanism. There is.

FIG. 4 shows details of each of the above-mentioned members, where the support frame 31 includes parallel members 32A, 32B,
It has a connecting member 33 that connects these, and is fixed to the case 3 with bolts or the like using mounting holes 34A and 34B. In the shaft holes 35A and 35B,
A rotating shaft 100 is supported in a state protruding from the outer surfaces of the parallel members 32A and 32B. A latch 41 is attached to this rotation shaft 100, and the latch 41
rotates left and right around this rotation axis 100. 3
6B (36A) is a pivot protrusion into which the pivot legs 73A, 73B of the handle lever 71 are fitted. Therefore, the handle lever 71 can be rotated left and right around the pivot projections 36A and 36B. 37A, 37B are parallel members 32A, 32B
This is a restraining part bent outward from the breaker, which restrains the rotation of the handle lever 71 when the shredder is turned on, and restrains the rotation of the latch 41 when the breaker is tripped.
38A and 38B are shaft holes for pivotally supporting the rotation pin 110 of the second latch 109, which will be described later, and 39A and 39B are the rotation pins 10 of the third latch 106, which will also be described later.
This is the shaft hole that supports the shaft.

The latch 41 has parallel members 42A, 42B and a connecting member 43 connecting the parallel members 42A, 42B. The upper portions of the parallel members 42A, 42B on the open end side are bent outward at a substantially right angle to form abutting surfaces 44A, 44B.
In addition, shaft holes 46 are provided in the lower arms 45A and 45B.
A, 46B are left open, parallel members 42A, 42
Pivot support members 47A and 47B are provided to protrude from the upper part of the inner surface of B, respectively, and are arranged to face each other. Further, a beak-shaped engagement surface 48 is provided to protrude outward from the upper butterfly portion of the connecting member 43.

The first toggle link 51, which is approximately U-shaped, has parallel members 52A, 52B and these parallel members 52.
It has a connecting member 53 that connects A and 52B. An open hole 5 is provided at the upper end of the parallel members 52A, 52B.
4A and 54B, and are fitted with the pivot members 47A and 47B of the latch 41, as shown in FIGS. 5A and 5B. Thereby, the first toggle link 51 can swing left and right around the pivot members 47A and 47B. Further, two prongs 55A, 55B are formed at the lower ends of the parallel members 52A, 52B.

The two prongs 55A, 55B of the first toggle link 51 connected to the latch 41 in this manner are fitted onto the pin 16 attached to the second toggle link 61 in the same manner as described above. Figure 6 shows frame 3
1, the latch 41 and the first toggle link 51 are shown assembled. Further, FIG. 7 shows a state in which a second toggle link 61, a handle lever 71, an opening/closing spring 102, etc. are further attached. In FIG. 7, an opening/closing spring 102 is located approximately in the center of the pin 16.
One end of the spring 102 is hooked, and the other end of the spring 102 is hooked to the spring hook portion 72 of the handle lever 71. Further, the second toggle link 61 is connected to the switch 9 via the pin 101, and the switch 9 is rotatably supported on the case 3 by the rotation shaft 10, as in the conventional case. Further, in FIG. 3, 103 is a movable iron piece of the tripping device 5, and when the movable iron piece 103 is sucked into the suction part 104, the movable iron piece 103 and a lever 105 are connected to a pin provided on the third latch 106. 107 and move the third latch 106 to the rotation pin 1.
08 in the counterclockwise direction, and as a result of this rotation, the second latch 106 that was locked with the third latch 106 is
Latch 109 is adapted to rotate clockwise about pivot pin 110 to disengage locking pin 111 attached to second latch 109 from engagement surface 48 of latch 41.

The operation of the operating mechanism of the circuit and disconnector configured in this way is the same as in the conventional example described above, but when the latch 41 and handle lever 71 of the operating mechanism that performs the rotation operation rotate, The behavior that is inhibited at the end of the rotation is different from the conventional example. Therefore, the behavior of the latch 41 and other members of the operating mechanism when the handle is inserted, removed, and opened will be explained once again.

First, when the handle 18 is closed as shown in FIG.
Since it is located to the left of the pivot members 47A and 47B of 1, the pivot protrusions 36A and 47B of the support frame 31
The handle lever 71 pivoted on the pivot projections 36A and 36B is rotated by the spring force of the opening/closing spring 102.
It has an urging force that tends to rotate around B in a counterclockwise direction. Here, the handle lever 71 is the eighth
As shown in the figure, the rotation of the frame 31 is inhibited by contacting the restraining portions 37A and 37B of the frame 31.

Next, if, for example, an overcurrent flows in the closed state of the circuit or disconnector shown in FIG. is released from the locking pin 111 provided on the second latch 109. Therefore, the latch 41 rotates counterclockwise around the rotation shaft 100 by the spring force of the opening/closing spring 102, but as shown in FIG. 31 and stops its rotation. In addition, in this state, the movable contact 8 that has performed the opening operation is connected to the rotation shaft 10 of the latch 41 that is pivotally supported on the support frame 31.
0, both sides of the rotation pin 101 abut against the restraining parts 37C and 37D of the frame 31 (see FIG. 4), and the clockwise rotation about the rotation shaft 100 is inhibited. There is.

FIG. 10 shows the state of the circuit and disconnector when the handle 18 is operated to open the circuit. In this state, the movable contact 8 is restrained from rotating in the same way as a circuit breaker. In addition, opening/closing spring 1
02 is located to the right of the dead center, the handle lever 71 attempts to rotate clockwise around its pivot legs 73A and 73B due to the spring force of the opening/closing spring 102, but the push of the latch 41 Its rotation is inhibited by contacting the contact surfaces 44A and 44B.

As explained above, according to the present invention, the latch in the operating mechanism is formed into a U-shape that is supported at two points on its rotation axis, and abutment surfaces are formed at the upper portions of both ends of the latch on the open side. On the other hand, since the support frame is provided with a restraining part that comes into contact with the abutting surface of the latch, this restraining part can be used to prevent rotation of the handle lever when the handle is in the closed state, and furthermore, in the tripped state, By abutting the abutment surface of the latch against this restraining part, the rotation of the latch can be restrained, and this restraining part can be used for double purposes, so it is possible to prevent the latch from rotating as in the conventional restraint part. There is no need to provide pins, which simplifies assembly and reduces costs.

[Brief explanation of the drawing]

Fig. 1A is a block diagram showing an example of the operating mechanism of a conventional circuit cutter, Fig. 1B is a block diagram of Fig. 1A seen from the direction of line A-A, and Fig. 2A is Figure B is a configuration diagram when viewed from direction B, Figure 2B is a sectional view taken along the line C-C, Figure 3 is a configuration diagram showing an example of the configuration of the circuit and breaker in the present invention, and Figure 4 is 3. A perspective view showing an example of the frame, latch, first toggle link, and second toggle link shown in FIG.
Plan view showing the engaged state of the toggle link, FIG. 5B
6 is a sectional view taken along the line D-D, FIG. 6 is a plan view showing the latch and first toggle link shown in FIGS. 5A and B assembled in the frame, and FIG.
Fig. 8 is a block diagram showing the contact state between the handle lever and the frame; Fig. 9 is a line diagram showing the trip state of the circuit and disconnector in the present invention; Fig. 10. FIG. 2 is a diagram showing the off state of the circuit and disconnector in the present invention. 1... Latch, 1A... Engaging surface, 1B... Deterring surface, 2... Rotating shaft, 2A... Groove, 3... Case,
3A... Bulkhead, 4... Frame, 4A... Pivotal part, 5... Tripping portion, 6... Lever, 7... Pin, 8... Movable contact, 9... Switch, 10...
Rotating shaft, 11... Pin, 12... First toggle link, 13... Second toggle link, 14... Opening/closing spring, 15, 16, 17... Pin, 16'... Locking part, 18... ... Handle, 19 ... Handle lever, 20 ... Locking part, 21 ... Locking pin, 31 ...
...Frame, 32A, 32B, 33... Member, 3
4A, 34B...Mounting hole, 35A, 35B, 38
A, 38B, 39A, 39B...Shaft hole, 36A,
36B... Pivotal projection, 37A, 37B... Restraint part, 41... Latch, 42A, 42B, 43...
Member, 44A, 44B...Abutment surface, 45A,
45B...Leg, 46A, 46B...Shaft hole, 47
A, 47B... Pivotal portion, 48... Engagement surface, 51...
...First toggle link, 52A, 52B, 53...
Member, 54A, 54B... Pivot hole, 55A, 55
B...Bifurcated, 61...Second toggle link, 71...
...Handle lever, 72...Locking part, 73A, 7
3B... Rotating leg, 100... Rotating axis, 101,1
07, 108, 110...pin, 102...spring, 103...movable iron core, 104...suction part, 1
05... Lever, 106... Third latch, 109
...Second latch, 111...Lock pin.

Claims (1)

[Claims for Utility Model Registration] A first toggle link is rotatably connected to a latch rotatably supported on a support frame via a rotation shaft, and a first toggle link is connected to the latch via a first pin. a second toggle link, the second toggle link is connected to a movable contact via a second pin, and a spring is provided between the handle lever rotatably supported on the support frame and the first pin. is stretched, and when the handle is inserted, rotation of the handle lever due to the spring force of the spring is inhibited by contacting the frame,
In the operating mechanism for a circuit or disconnection switch, the rotational operation of the latch due to the spring force of the spring is inhibited by coming into contact with the frame at the time of tripping, wherein the latch has parallel parts parallel to each other and a connecting part connecting the parallel parts; an engaging part formed by bending the front edge of the parallel part outward; a connecting part formed in the parallel part and connecting the first toggle link; and the parallel part. the first toggle link has a link parallel part corresponding to the parallel part of the latch, and a link parallel part provided in the link parallel part and connected to the connecting part of the latch; a link connecting portion provided in the link parallel portion and pivotally supported by a connecting pin of the second toggle link, and a connecting portion connecting the link parallel portion, and the support frame is connected to each other. a parallel part, a shaft support hole formed in the parallel part to support the rotation shaft of the latch, a locking part formed by bending outward from the upper edge of the parallel part, and The handle lever includes parallel parts parallel to each other, a connecting part connecting the parallel parts at the top, and a connecting part formed at the lower part of the parallel part and connecting the pivot part of the support frame. and a leg portion pivotally supported by the branch, and when the handle is inserted, the front edge of the parallel portion of the handle lever comes into contact with the locking portion of the support frame and is restrained, and when the handle lever is tripped, the engaging portion of the latch is restrained. An operating mechanism for a circuit or disconnector, characterized in that it is restrained by coming into contact with a locking portion of the support frame.