JPH0334818Y2 - - Google Patents

Description

[Detailed explanation of the idea] Purpose of invention (Industrial application field) This invention relates to a retractable switch.

(Prior art) In recent years, as customer buildings in urban areas have become more high-rise, underground power distribution systems have been adopted from the perspective of environmental harmony with the local area. It was developed to be installed on the ground due to its characteristics.

(Problems to be solved by the invention) However, ground-mounted switches are desired to be made more compact due to restrictions on installation space and stricter regulations regarding road management. With the desire for compactness and the automation of underground power distribution,
Due to the combination of ZCT, CT, ground relays, etc., switches with functions equivalent to overcurrent lock mechanism type switches (SOG type) were needed, and there was a trend toward larger switches.

Structure of the invention (means for solving problems) The retractable switch of this invention is equipped with an opening/closing operation mechanism that has a manual closing/opening operation mechanism for the opening/closing lid and an automatic trip opening mechanism. A first shaft that is driven manually to open and close by an operating lever is rotatably installed in the front of the mechanism frame, and a second shaft that is connected to the opening and closing part via a connecting link or the like is also rotatably installed in the rear. A first lever that rotates following the first shaft, and an upper power storage lever that is rotatably attached to the second shaft are provided on one side of the mechanism frame. ,
A toggle lock mechanism is provided, which includes a link connecting both levers, and a lower power storage lever attached to the second shaft so as to extend in a direction opposite to the upper power storage lever; A closing spring force storage mechanism is provided, which includes a spring support shaft installed nearby and a closing spring disposed between the spring support shaft and the lower force storage lever, while on the other side of the mechanism frame, Consisting of a power storage operation lever that is rotatably attached to the first shaft, a power storage lever that is rotatably attached to the second shaft, and a power storage link that links both levers. A release spring is provided with a toggle lock mechanism and includes the force storage lever, a spring support shaft installed near the first shaft, and a release spring disposed between the spring support shaft and the force storage lever. The gist of this is that it has a power storage mechanism.

(Function) With the above configuration, both springs are placed on both sides of the mechanism frame, and the mechanism is placed between them, which not only makes the whole compact, but also reduces the storage space. Power is stored, and the power is stored in the closing spring when the valve is manually opened.

(Embodiment) An embodiment embodying this invention will be described below with reference to FIGS. 1 to 13.

In FIG. 1, the main body case 2 of the air switch 1, which is installed upright on a sidewalk or the like, is formed into a box shape, and an opening 3 on the front side thereof is provided with an opening/closing door 4. The inside of the main body case 2 is divided into an upper machine room 6 and a lower cable connection room 7 with a support plate 5 as a boundary.

A base 8 is placed and fixed on the upper surface of the support plate 5,
The base 8 is formed by integrally molding fixed electrodes (not shown) for three phases and three circuits with an insulating synthetic resin such as epoxy resin. or,
A power cable connection terminal 10 and a plurality of branch cable connection terminals 11 are provided on the lower surface of the base 8 to protrude downward through the support plate 5, and are connected to a power cable 12 and a branch cable 13, respectively.

Further, above the base 8, there are provided a plurality of opening/closing lids 14 each containing a pair of movable electrodes (not shown). When this opening/closing lid 14 moves downward,
The movable electrode (not shown) comes into contact with the fixed electrode (not shown) of the base 8 to be in the closed state, and when the opening/closing lid 14 is moved upward, both electrodes are separated and brought into the open state. This opening/closing lid 14 can be removed for each circuit.

An opening/closing section 15 is constituted by the base 8 and the opening/closing lid 14.

Further, above the opening/closing lid 14, an opening/closing operation mechanism 17 for vertically moving each opening/closing lid 14 is provided for each circuit. That is, the opening/closing operation mechanism 17 consists of a manual operation mechanism and a trip release mechanism as an automatic opening mechanism, and is driven to open and close by attaching the operation handle and operating the operation handle to open and close the operation handle, and also receives a trip signal. The trip is released by applying .

Next, the opening/closing operation mechanism 17, which can be manually operated and opened by a trip, will be explained in detail.

In FIG. 5, a plurality of pillars 18 are erected on both the front and rear sides of the support plate 5, and a support plate 19 is fixed to the upper part of the pillars 18. A mechanism frame 20 is provided on the upper surface of the support plate 19 for each circuit.

As shown in FIGS. 3 and 4, the mechanism frame 20 includes a pair of left and right side plates 22 and 23 whose lower ends are fixed to the support plate 19.
It is integrally formed in a reverse channel shape with a connecting plate 24 that connects the front upper end portions of 2 and 23.

In the mechanism frame 20, left and right side plates 2
A first fixed shaft 25 serving as a first shaft is installed between the lower portions of the shafts 2 and 23. A U-shaped operating lever 26 is rotatably supported on the first fixed shaft 25 at both opposing sides thereof. A cylindrical operation handle mounting portion 27 that projects forward is formed on the front surface of a connecting portion that connects both sides of the operation lever 26 .

An engagement pin 28 extending rightward is provided at the tip of the right side of the operating lever 26 in a protruding manner. A support plate 2 is provided at the center of the front part of the support plate 19.
1 is fixed upright, and a bracket 3 is installed on its left side.
A stopper 33 is fixedly installed through the stopper 2, and is configured to engage with the lower surface of the connecting plate 24 of the operating lever 26 which rotates to make the closing operation, thereby regulating the amount of the closing rotation.

Further, a first linking lever 29 is rotatably supported on the right end side of the first fixed shaft 25. A locking hole 30 formed into a long hole along the rotation locus of the locking pin 28 is provided in the center portion extending rearward of the first series locking lever 29. The tip of the is inserted.

The locking hole 30 is formed so that when the operating lever 26 is rotated in the closing direction (counterclockwise direction) or the opening direction (clockwise direction) by the loading/unloading operation, the engaging pin 28 of the operating lever 26 is inserted at both upper and lower ends thereof. By being selectively locked to the section, the first series engagement lever 29 is rotated in the closing direction (counterclockwise direction) or the opening direction (clockwise direction). A stopper 35 is fixed to the inner surface of the central portion of the side plate 23 via a bracket 34, and is adapted to engage with the lower surface of the first series locking lever 29, which rotates in the opening direction, to restrict the amount of the opening rotation. A pair of links 31 are rotatably attached to the tip of the first series engagement lever 29 about a shaft 29a.

In the mechanism frame 20, left and right side plates 2
A second fixed shaft 36 as a second shaft is installed between the rear portions of the shafts 2 and 23. An upper power storage lever 37 is rotatably supported on the second fixed shaft 36 in correspondence with the link 31, and the other end of the link 31 is connected to the tip of the upper power storage lever 37 by a shaft 37a. Rotatably linked.

As shown in FIG. 6, when the first engagement lever 29 is rotated clockwise, the shaft 29
When a crosses the dead point A connecting the first fixed shaft 25 and the shaft 37a downward, the first engagement lever 2
The lower surface of the distal end of the link 9 is engaged with the stopper 35, so that the first series engagement lever 29 and the link 31 are kept in a valley-bent state. Further, the second fixed shaft 36
A lower power storage lever 38 is fixed integrally with the upper power storage lever 37 on the left side of the upper power storage lever 37, and its tip extends in the opposite direction to the upper power storage lever 37. There is.

A spring support shaft 39 is installed between the support plate 21 and the side plate 23, and one end of a pair of spring support plates 40 is rotatably supported on the spring support shaft 39. Furthermore, elongated holes 40a are formed in the other ends of both spring support plates 40 in the longitudinal direction, and both ends of the sliding shaft 41 fixed to the tip of the lower force storage lever 38 slide through each elongated hole 40a. It is movably inserted. A spring receiving member 42 bent into a channel shape is rotatably supported on the sliding shaft 41, and the other end of the spring supporting plate 40 is inserted through the center of the spring receiving member 42 so as to be movable forward and backward. ing.

A closing spring 43 is wound doubly between the spring receiving member 42 and the spring supporting plate 39, and the closing spring 43 has both ends locked to the spring receiving member 42 and the spring supporting plate 39. The closing spring 43 changes from the extended state shown in FIG. 7 to the lower force storage lever 3.
8 is rotated clockwise, the sliding shaft 41
is pressed through the spring receiving member 42 by sliding forward through the elongated hole 40a of the spring support plate 40,
It is starting to accumulate energy.

The upper power storage lever 37 and the lower power storage lever 3
8. The spring support shaft 39 and the closing spring 43 constitute a closing spring force storage mechanism T.

The upper power storage lever 3 at the second fixed shaft 36
On the left side of 7, a closing actuation lever 44 is fixed integrally with the upper power storage lever 37 via a connecting pipe 44a rotatably attached to the second fixed shaft 36.
An operating pin 45 is provided protruding from the left side surface of its upper end. A drive lever 46 is rotatably supported at the center of the second fixed shaft 36. The drive lever 46 is connected to a pair of left and right side plates 47, 48 and the same side plate 4.
7 and 48 at their rear ends, and a connecting plate 49 that connects the left side plate 47 at its rear end.

A link 9 is provided at the tip of the drive lever 46.
0 is rotatably supported, and the link 9
The lower end of the movable frame 91 is pivotally attached to the upper part of the movable frame 91 so as to be rotatable. The movable frame 91 is an opening/closing lid support 9 that extends back and forth as shown in FIGS. 3 and 5.
2 and the four support rods 93 which are connected to the front and rear ends of the opening/closing lid support 92, respectively, and whose upper and lower ends are fixed to the support plate 19 and the pair of front and rear columns 18, respectively. The guide tube 94 is made up of a The opening/closing lid 14 is removably supported by the opening/closing lid support 92.

The drive lever 4 at the second fixed shaft 36
A first driven lever 50 is rotatably supported on the inner surface of the right side plate 48 of No. 6, and the operating pin 45 is arranged so as to press against the upper rear end surface of the first driven lever 50.
Further, a second driven lever 51 that is fixed integrally with the first driven lever 50 at a position to the left of the first driven lever 50 is rotatably supported on the second fixed shaft 36 . At the upper part of the second driven lever 51 extending upward, there is a bird's beak-shaped locking part 52 facing backward.
is formed. Further, the left side plate 47 of the drive lever 46 and the second driven lever 5 are connected to the second fixed shaft 36.
A biasing spring 50a is wound between the two ends of the biasing spring 50a, and both ends of the biasing spring 50a are engaged with the drive lever 46 and the second driven lever 51 in the direction of bringing the first driven lever 50 into contact with the actuating pin 45 (clockwise direction). ).

A locking member 53 having a channel-shaped proximal end is rotatably supported at the lower part of the locking part 52 by a shaft 53a, and a distal end having an L-shape in cross section is rotatably supported. As shown in Figure 4, the cross section is L.
A letter-shaped support piece 54 is fixed, and the rear wall is arranged correspondingly behind the locking part 52. and,
An adjustment screw 55 is screwed into the rear wall of the support piece 54 from the rear, and its tip comes into contact with the rear surface of the locking portion 52 to adjust the screwing amount of the adjustment screw 55. This makes it possible to adjust the amount of tilting of the lock member 53 with respect to the second driven lever 51. Further, the shaft 53a has locking members 5 at both ends.
A twist coil spring 56 is wound around the inner surface of the lock member 5 and the first driven lever 50.
3 is always biased counterclockwise (forward).

A lower end portion of the lower portion of the second driven lever 51 is bent forward, and a lower end portion of a crank-shaped lock link 59 is attached to the bent portion so as to be rotatable about a shaft 59a. A twist coil spring 59b is wound around the lock link 59 to urge the lock link 59 to rotate counterclockwise in FIG. 9a. A rolling roller 60 is rotatably supported on the left side surface of the upper end of the lock link 59, and when a lock mechanism R to be described later is in the locked state,
The rolling roller 60 is brought into contact with the lower end of the locking member 53, and the bent portion 5 is bent forward.
It is designed to be locked to the connecting shaft 63 at 9c.

Further, when the lock member 53 rotates clockwise, the lock link 59 moves toward the drive lever 46.
The rolling roller 60 is rotated in the clockwise direction by the stored force of the release spring 77 of the release spring force storage mechanism K, which will be described later, and is disengaged from the lower end of the locking member 53, and the locking mechanism R, which will be described later, is in the locked state. is canceled.

One end of a regulation link 61 is rotatably provided at the lower end of the second driven lever 51 on a shaft 62, and a long hole 61a is transparently provided from the center of the regulation link 61 to the other end. There is. The left and right side plates 4 of the drive lever 46 are provided in the long hole 61a.
A connecting shaft 63 installed between the lower portions of 7 and 48 is slidably inserted therethrough. Further, one end of a swing lever 64 is rotatably attached to the connecting shaft 63, and the other end of the swing lever 64 is rotatably supported on the upper part of the lock link 59. .

A lock mechanism R is constituted by the lock member 53, the lock link 59, the regulating link 61, the swing lever 64, and the like. In the locking mechanism R, the rolling roller 60 locks the locking member 5 in the locked state.
3, and the connecting shaft 63 is located approximately at the center of the elongated hole 61a of the regulating link 61.
At this time, the lock link 59 is abutted and locked to the connecting shaft 63 at the bent portion bent forward, so that
The lock link 59 therefore cannot rotate in either the clockwise or counterclockwise direction about the shaft 59a. As a result, when the first driven lever 50 is turned counterclockwise, the first driven lever 50, the second driven lever 51, the locking member 53, the locking link 59, and the regulating link 6
1. The singing lever 64 and the driving lever 46 are rotated together.

Further, when the drive lever 46 is driven clockwise to open, the respective members are similarly driven to open as one.

In order for the lock mechanism R to return from the unlocked state shown in FIG. 10 to the locked state, the reset mechanism described later is
The reset lever 66 in the bent state that constitutes the RS
and the reset link 70 are brought into a valley-bent state. Then, the second driven lever 51 and the first driven lever 50 are rotated clockwise by the biasing force of the twist coil spring 50a, and the lock member 53 is also moved clockwise. By rotating the second driven lever 51 in the clockwise direction, the regulation link 61 is regulated by the connecting shaft 63 through the elongated hole 61a, and the shaft 6 is rotated.
Rotate clockwise around 2. As a result, the lock link 59 was rotated slightly counterclockwise from the state shown in FIG. 10 and then moved clockwise according to the rotation locus allowed by the swing lever 64 due to the biasing force of the twist coil spring 59b. It abuts the lower end of the locking member 53, and furthermore, the bent portion 59c
The connecting shaft 63 is engaged with the connecting shaft 63 to be in a locked state.

Further, a trip coil 58 is fixed to approximately the center of the connecting plate 24 constituting the mechanism frame 20 via a mounting piece 57 extending rearward. When the trip coil 58 is energized while the opening/closing operation mechanism 17 is in the manually closed state, the plunger 58a is attracted against the urging force of a coil spring 58b wound outside the plunger 58a and is moved to protrude rearward, thereby locking the trip coil 58. The lock member 53 is disposed so as to come into contact with the front surface of the lock member 53 in the state. Note that when the trip coil 58 is demagnetized, the plunger 58a returns to its original state due to the biasing force of the coil spring 58b.

Next, to explain the reset mechanism RS, a reset lever 66 is rotatably supported on the first fixed shaft 25 between both side plates of the operation lever 26, and a torsion spring wound around the first fixed shaft 25 is supported. 67, it is always urged to rotate counterclockwise in FIG. The reset lever 66 has an abutment part 68 projecting forward at the upper part of its front end, which can be engaged with the upper part of the connecting part 26a that connects both side plates of the operating lever 26, and a rear end extending rearward. A locking piece 69 protrudes rightward from the upper part.

Further, the front end of a reset link 70 is rotatably attached to the rear end of the reset lever 66 by a shaft 66a, and the front end can come into contact with the lower surface of the locking piece 69 of the reset lever 66. There is. moreover,
The rear end of the reset link 70 is rotatably attached to the front lower end of the second driven lever 51 by a shaft 62.

The reset lever 66 and the reset link 7
0, a reset mechanism RS is constituted by a twist spring 67 and the like.

When the front end of the reset lever 66 and the reset link 70 are engaged with the locking piece 69 as shown in FIGS. 9a and 10, the shaft 66a is the first fixed shaft. 25 and the shaft 62, it is in a slightly mountain-folded state located above the dead point B.

As shown in FIGS. 9a and 10, this reset mechanism RS is attached to the operating handle mounting portion 27.
When the operating lever 26 is turned clockwise in the figure from the downward position, the reset lever 6
When the connecting portion 26a abuts against the abutting portion 68 of 6 and presses upward, the reset lever 66 is rotated clockwise against the biasing force of the torsion spring 67. Then, the front end of the reset link 70 is pressed downward by the locking piece 69, so that the shaft 6
6a crosses dead point B downward. As a result, the reset lever 66 and reset link 70
is in a valley-bent state, allowing rotation of the second driven lever 51 in the clockwise direction.

Next, the release spring force storage mechanism K will be explained.

A bearing piece 71 is provided on the lower surface of the connecting plate 24 constituting the mechanism frame 20 at a position slightly to the left of the center thereof and protrudes downward, and the bearing piece 71 and the mechanism frame 20
A spring support shaft 72 is installed between the side plates 22 . The second fixed shaft 36 corresponds to the spring support shaft 72.
A force storage lever 74 is rotatably supported on the spring support shaft 72 , and a pair of spring support plates 7 are supported on the spring support shaft 72 .
One end of 3 is rotatably supported.

Furthermore, elongated holes 73a are formed in the other ends of both spring support plates 73 in the longitudinal direction, and both ends of the sliding shaft 75 fixed to the tip of the force storage lever 74 slide through each elongated hole 73a. Possibly inserted. A spring receiving member 76 bent into a channel shape is rotatably supported on the sliding shaft 75, and the other end of the spring supporting plate 73 is inserted through the center of the spring receiving member 76 so as to be movable forward and backward. ing.

An open spring 77 is wound doubly between the spring receiving member 76 and the spring support shaft 72, and the open spring 77 has both ends locked to both 72 and 76. When the release spring 77 is rotated counterclockwise from the extended state shown in FIGS. 11 and 13, the sliding shaft 75 slides forward through the elongated hole 73a of the spring support plate 73. By doing so, it is pressed through the spring receiving member 76 and the force is stored.

Further, on the second fixed shaft 36 on the outer surface side of the side plate 47 of the drive lever 46, an opening operating lever 78 integrally connected to the power storage lever 74 is rotatably supported approximately at the center, and a lower end thereof is rotatably supported. One end of the third force storage link 84 is rotatably attached to a shaft 84a. A release operation pin 79 is protruded from the right side of the upper end of the release operation lever 78, and the release operation pin 79 is brought into contact with the front surface of the upper left side of the drive lever 46, and is directed in the opening direction of the release operation lever 78. (clockwise direction) to drive lever 4.
6.

A power storage operating lever 80 extending downward is attached to the left side of the first fixed shaft 25 so as to be rotatable together with the operating lever 26 via a connecting pipe 80a. A first power storage link 81 is rotatably supported at the center of the rear portion of the shaft 80 . A pressing piece 82 extending to both sides is formed at the lower end of the power storage operation lever 80.
When the first power storage link 81 is rotated counterclockwise (power storage direction), the first power storage link 81 is driven rearward.

One end of a second power storage link 83 is rotatably attached to the lower end of the first power storage link 81 via a shaft 81a, and a third power storage link 84 is attached to the other end of the second power storage link 83. The other end is rotatably supported by a shaft 83a.

A stopper member 85 having a channel-shaped cross section is rotatably supported on the shaft 83a, and a connecting plate 86 connects the lower portions of both side plates of the stopper member 85.
The second power storage link 83 and the third power storage link 84 are in a bent state (referring to the state shown in FIG. 11) in which the shaft 83a exceeds the dead point C connecting the shaft 81a and the shaft 84a to both front and rear ends of the shaft. The lower part is locked to maintain this state. Further, a twist spring 87 is wound around the shaft 83a, and the twist spring 87 biases the second force storage link 83 against the third force storage link 84 in a direction in which it is bent at a peak. It's summery.

Further, a lock release pin 88 is protruded leftward from the outer surface of the left side plate 47 of the drive lever 46 so as to be able to come into contact with the upper part of the second force storage link 83. That is, when manually closing from the manually opened state shown in FIG. It abuts and presses the upper side of the second force storage link 83, causing the shaft 83a to pass below the deldo point C. When the drive lever 46 is fully closed, the lock pin 88 locks the second force storage link 83 as shown in FIG. 12, thereby holding the release spring 77 in the open standby state. .

The power storage lever 7 at the second fixed shaft 36
An engagement pin 89 is provided in a protruding manner on a connecting pipe 74a that integrally connects the opening operation lever 78 with the opening lever 78. or,
As shown in FIGS. 4 and 5, a limit switch is located at the center of the inner surface of the side plate 22 of the mechanism frame 20.
The limit switch LS is fixed, and the actuator LSa of the limit switch LS extends to correspond to the tip of the engagement pin 89.

The actuator LSa is pressed by the engaging pin 89 when the engaging pin 89 is rotated counterclockwise during manual input, thereby operating the limit switch LS. The limit switch LS is electrically connected to the control relay, and the operation of the limit switch LS sends a signal to the control relay to prepare for trip coil operation, after which the link mechanism maintains the closed state.

The power storage operation lever 80 and the first power storage link 8
1. Second force storage link 83, stopper member 85, twist spring 87, force storage lever 74, spring support plate 7
3, the spring receiving member 76 and the opening spring 77 constitute an opening spring force storage mechanism K.

Next, the operation of the opening/closing operation mechanism 17 in the retracting switch 1 configured as described above will be explained.

Manual Insertion Now, if manual input is performed from the manually released state, in this state, the first series of locking levers 29 and the link 31 are locked by the stopper 35, and the first series of locking levers 29 and link 31 are bent at the bottom as shown in FIG. is in a state,
The shaft 29a is located below the dead point A. In this state, the release spring 77 is in an extended state with the force storage lever 74 positioned rearward (see FIG. 11), and the second force storage link 83 and the third force storage link 84 are connected to the front and rear of the connecting plate 86. The shaft 83a is located above the dead point C in a bent state where it is locked at both ends. On the other hand, the closing spring 43 is held in a stored state by the lower power storage lever 38.

In this state, attach an operating handle (not shown) to the operating handle mounting portion 27 of the operating lever 26, and use the operating handle to rotate the operating lever 26 counterclockwise until it is stopped by the stopper 33. . Then, the power storage operation lever 80 is also rotated in the same direction, and the second power storage link 83 is pressed rearward by the pressing piece 82. As mentioned above, the second power storage link 83 and the third power storage link 84 are supported by the stopper member 85 in a bent state, so the second power storage link 83 and the third power storage link 84 are supported in the bent state by the stopper member 85. 84 moves backward. Then, the force storage lever 74 is pressed and rotated in the counterclockwise direction by the third force storage link 84, so that the release spring 77 is pushed through the spring receiving member 76.
Accumulate energy.

Further, when the operating lever 26 is rotated in the counterclockwise direction, the engagement pin 28 moves in the same direction and is engaged with the upper end of the locking hole 30 of the first series engagement lever 29. 29 rotates in the same direction.
Then, when the shaft 29a of the first engagement lever 29 moves upward past the dead point A, the toggle locks of the first engagement lever 29, the link 31, and the upper force storage lever 37 are released, and the accumulated force of the closing spring 43 is released. Since the shaft 41 is suddenly pushed in the direction of the arrow in FIG. (clockwise).

Then, since the lock mechanism R is in the locked state, as a result, the first driven lever 50 and the second driven lever 5
1. The locking member 53, the locking link 59, the regulating link 61, the swinging lever 64, and the drive lever 46 are rotated together for early insertion. As a result, the movable frame 91 supporting the opening/closing lid 14 via the link 90 is vertically moved downward.

When the drive lever 46 is rotated in the closing direction, the lock release pin 88 of the left side plate 47 of the drive lever 46 hits the upper side of the second power storage link 83 which is in a bent state with the third power storage link 84. come into contact with
Then, since the front end of the second force storage link 83 is locked to the pressing piece 82 via the first force storage link 81, the rear end is moved downward and the shaft 83a crosses the valley below the dead point C. It is in a bent state (12th
(see figure), as a result, the release spring 77 of the release spring force storage mechanism K enters the force storage holding state.

Further, when the first driven lever 50 is rotated counterclockwise, the second driven lever 51 is also rotated in the same direction, so that the reset lever 66 and the reset lever 66, which are in the bent state shown in FIG. 8, are rotated in the same direction. link 70
is pulled by the second driven lever 51 to perform a follow-up operation, and in addition, the shaft 6 is pulled by the biasing force of the torsion spring 67.
6a crosses above dead point B, forming a toggle lock (see Figure 9),
The drive lever 46, together with the lock mechanism R, becomes unable to rotate clockwise.

Further, when the drive lever 46 is rotated counterclockwise (closing rotation direction), the engagement pin 89 presses the actuator LSa and closes the limit switch.
Turn on the LS and send the trip coil operation preparation signal to the control relay.

In this way, the opening/closing lid 14 supported by the opening/closing lid support 92 performs an early closing operation.

Manual Release A case will be described in which the manual release is performed from the manually closed state, that is, the state of the power storage lever 74 shown in FIG. 12 and the state shown in FIG. 7. Note that in this state, the release spring 77 is in a power storage state, and the closing spring 43
is the state in which the stored power is released.

When the operating lever 26 is rotated clockwise using an operating handle (not shown), the engagement pin 28
contacts and presses the lower end of the locking hole 30 to rotate the first series locking lever 29 in the same direction. Then, the upper power storage lever 37 is rotated clockwise via the link 31 shown in FIG.
is compressed and stored. Then, when the shaft 29a passes downwardly over the dead point A connecting the first fixed shaft 25 and the shaft 37a, the lower part of the first series engaging lever 29 is engaged with the stopper 35, and in this state, the closing spring 43 for closing is engaged. It is maintained in a compressed energy storage state (6th
(see figure).

Further, when the operating lever 26 is rotated clockwise and the connecting portion 26a of the operating lever 26 comes into contact with the abutting portion 68 of the reset lever 66, the reset lever 66 is rotated in the same direction.
The locking piece 69 presses against the front end of the reset link 70. As a result, the shaft 66a crosses the dead point B connecting the first fixed shaft 25 and the shaft 62 downward, so that the toggle lock is released.

As a result, in the opening spring force storage mechanism K, the sliding shaft 75, the force storage lever 74, and the opening operation lever 78
Since the drive lever 46 is rapidly rotated clockwise about the second fixed shaft 36 by the force stored in the release spring 77 via the opening operation pin 79, the movable frame 91 is rotated via the linkage link 90. The lid 14 is pulled up and opened. (See Figure 8).

On the other hand, as the operation lever 26 is rotated clockwise, the force storage operation lever 80 is also rotated clockwise, and the force storage lever 74 of the opening spring force storage mechanism K is rotated. Since it is rotated clockwise by the force, it is driven by the second and third force storage links 83 and 84 and the first force storage lever 8
1 operates so as to follow the force storage operating lever 80 while in contact with the pressing piece 82 . Then, while the force storage lever 74 is rotating clockwise to open, the shaft 8
3a crosses the dead point C connecting the shafts 81a and 84a upward, and connects the second and third links 83,
84 forms a mountain-folded state in which the stopper member 85 is engaged with both front and rear ends. In addition, the lock release pin 88
Since it rotates clockwise together with the drive lever 46, it does not interfere with the operation of the second link 83. Further, as the force storage lever 74 rotates clockwise, the engagement pin 89 releases the pressure on the actuator LSa of the limit switch LS.

As a result, the manually released state from the manually closed state becomes the state shown in FIGS. 6, 8, and 11.

Automatic release Next, the case of automatic release from the manual closing state will be explained.

In the states shown in FIGS. 7, 9a and 9b, and 12, when the trip coil 58 is energized, the plunger 58a is attracted and hits the upper part of the locking member 53. Then, the locking member 53 is moved by the twisting spring 56.
It is rotated clockwise about the shaft 53a against the urging force of. As a result, the engagement between the lower end of the lock member 53 and the rolling roller 60 of the lock link 59 is released, that is, the locked state of the lock mechanism R is released, and the drive lever 46 is moved by the release spring 77 of the force storage mechanism K. As the movable frame 91 is pulled up via the link 90, the lid 14 is opened (see Fig. 10). .

In the lock mechanism R, when the rolling roller 60 of the lock link 59 comes off the lock member 53, the swing lever 64 follows the rotation of the lock link 59 and rotates around the connecting shaft 63 from the state shown in FIG. Also, since the connecting shaft 63 of the drive lever 46 rotates clockwise together with the drive lever 46, the regulating link 61 rotates counterclockwise around the shaft 62 within the range allowed by the elongated hole 61a. It rotates and becomes the state shown in Fig. 10.

By rotating the force storage lever 74 in the clockwise direction, the engagement pin 89 releases the pressure on the actuator LSa of the limit switch LS.

Note that during automatic opening, when the drive lever 46 is rotated in the clockwise direction (opening direction) as described above, the first driven lever 50 and the second driven lever 5
Since the first gear does not rotate, the reset lever 66 and the reset link 70 have their shafts 66a at the dead point B.
The toggle lock is held above and does not operate the operating lever 26. Further, in the open spring force storage mechanism K, even if the force storage lever 74 is rotated clockwise, the third force storage link 84 is not connected to the shaft 83.
The first power storage link 81 and the second power storage link 83 are connected to the first power storage link 81 by simply rotating counterclockwise around a.
As shown in Figure 3, it remains in the manual input state.

Therefore, the operating lever 26 does not rotate clockwise. Therefore, even if the operating handle (not shown) is automatically opened while attached to the operating lever 26, the operating lever 26 does not rotate, so it is safe.

Note that when the manual closing state is automatically released, the operating lever 26 is already in the manual closing position as shown in FIG. If you want to perform manual input operation after this automatic release, use the operation lever 2.
6 in the clockwise direction via an operating handle (not shown).

Then, the connecting portion 26 a contacts and presses the contact portion 68 of the reset lever 66 , and the reset lever 66 resists the biasing force of the twist spring 67 .
is rotated clockwise. Then, the locking piece 69 presses the front end of the reset link 70 downward, so that the shaft 66a passes the dead point B downward. As a result, the reset lever 66 and the reset link 70 are bent, allowing the second driven lever 51 to rotate clockwise.

Then, the second driven lever 51 and the first driven lever 50 are rotated clockwise by the biasing force of the twist spring 50a, and the lock member 53 is also moved clockwise. Further, by rotating the second driven lever 51 in the clockwise direction, the regulating link 61 is regulated by the connecting shaft 63 through the elongated hole 61a, and the shaft 62 is rotated.
Rotate clockwise around the center. As a result, the lock link 5 moves according to the rotation locus allowed by the swing lever 64 due to the biasing force of the twist spring 59b.
9 is the lock member 5 which has been rotated slightly counterclockwise from the state shown in FIG. 10 and moved clockwise.
3, and is further engaged with the connecting shaft 63 at the bent portion 59c, resulting in a locked state.

From this state, a manual input operation can be performed using an operation handle (not shown).

In this embodiment, force can be stored in the opening spring 77 during manual closing, and force can be stored in the closing spring 43 during manual opening, and as a result, quick closing is possible and the operating load can be reduced.

Note that this invention is not limited to the above-mentioned embodiments, and can be arbitrarily modified without departing from the spirit of this invention.

Effects of the invention As detailed above, this invention is a switch with an automatic trip release mechanism, in which a toggle lock mechanism and a closing spring force storage mechanism are arranged on one side of the mechanism frame, and a toggle lock mechanism is installed on the other side of the mechanism frame. Because it is equipped with a release spring force storage mechanism, even though there are many links, levers, and other parts required for manual closing and manual opening operations, the spacing between these parts can be narrowed, and the storage space can be reduced. In addition, the entire retracting switch can be made more compact, and the force of the opening spring can be stored at the same time in conjunction with the manual closing operation; It is an excellent idea for industrial use because it has the effect of being able to perform various operations.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of a retractable switch embodying this idea, Figure 2 is a side view, Figure 3 is a front view of the opening/closing mechanism, Figure 4 is a plan view, and Figure 5. 6 is a side sectional view showing the opening/closing operation mechanism in the manually closed state, FIG. 6 is a side sectional view of the closing spring storage mechanism in the manually opened state, and FIG. 7 is a side sectional view in the manually closed state and the trip released state. Fig. 8 is a side sectional view of the main parts of the opening/closing operation mechanism in the manual opening state, Fig. 9a is a side sectional view also showing the manual closing state, Fig. 9b is a rear view of the main parts, and Fig. 10 is also the automatic opening state. Fig. 11 is a side sectional view showing the open state when the release spring force storage mechanism is manually opened, Fig. 12 is a side sectional view showing the manual closing state, and Fig. 13 is the same when the mechanism is automatically opened. FIG. 1...Air switch, 2...Main case, 3...
Opening, 4... Opening/closing door, 6... Machine room, 14...
Opening/closing lid, 15... Opening/closing part, 17... Opening/closing operation mechanism, 20... Mechanism frame, 22... Side plate, 23
... Side plate, 24 ... Connection plate, 25 ... First fixed shaft as the first shaft, 26 ... Operation lever, 29 ...
...First link lever, 31...Link, 36...Second fixed shaft as second shaft, 37...Upper force storage lever, 38...Lower force storage lever, 39...Spring support shaft, 43... ...Closing spring, 44...Closing actuation lever, 45... Actuation pin, 46... Drive lever, 7
2... Spring support shaft, 74... Force storage lever, 77...
...Release spring, 78...Release operation lever, 79...
Opening operation pin, 80...Power storage operation lever, 81...
...First power storage link, 83...Second power storage link, 8
4...Third power storage link, 90...Connection link,
LS: Limit switch, K: Opening spring storage mechanism, T: Closing spring storage mechanism, RS: Reset lever, A, B, C: Dead point.

Claims (1)

[Scope of Claim for Utility Model Registration] In a pull-in switch equipped with an opening/closing operation mechanism that has a manual opening/closing mechanism for opening/closing the lid and an automatic trip opening mechanism, manual closing is performed using a control lever 26 at the front of the mechanism frame 20. A first shaft 25 that is driven to open is rotatably installed, and a second shaft 36 connected to the opening/closing part 15 via a connecting link 90 or the like is also rotatably installed at the rear. A first shaft 2 is provided on one side of the mechanism frame 20.
5, an upper power storage lever 37 rotatably attached to the second shaft 36, and a link 31 linking the levers 29 and 37. A lower power storage lever 38 is provided with a toggle lock mechanism and is attached to the second shaft 36 so as to extend in the opposite direction to the upper power storage lever 37, and a spring support installed near the first shaft 25. a shaft 39 and a closing spring 4 disposed between the spring support shaft 39 and the lower force storage lever 38;
On the other hand, on the other side of the mechanism frame 20, there is provided a force storage operation lever 80 which is rotatably attached to the first shaft 25, and the second A toggle lock mechanism is provided which includes a power storage lever 74 rotatably attached to the shaft 36 of the power storage lever 74 and a power storage link 81 that connects both levers 80 and 74.
, a spring support shaft 72 installed near the first shaft 25, and the spring support shaft 72 and the force storage lever 7.
4. A retracting switch characterized in that an opening spring force storage mechanism K is provided, which includes an opening spring 77 disposed between the opening spring 77 and the opening spring 77.