JPH021326B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a system for accumulating pressure in an energy storage spring by operating a handle, and turning on/off a contact opening/closing mechanism by releasing the energy storage spring. It is related to vessels.

Fig. 9 is a schematic configuration diagram showing the main parts of a conventional seed cutter disclosed in Japanese Patent Publication No. 54-39910, Fig. 10 is an explanatory diagram of the operation, and Fig. 11 is the main component parts. FIG.

In each of the above figures, 178 is a swinging member, which is equipped with a circular opening 105 and a protruding portion 106.
It is rotatably supported at a predetermined position on the crankshaft 171. Reference numeral 107 is a biasing pawl, which is attached to the swinging member 1.
It is rotatably attached to a predetermined position of 78 via a pin 108, and is engaged with the ratchet wheel 174 while being biased counterclockwise by a torsion spring 109.

111 is a lever having an end 112, as shown in FIG.
8, and is rotatably attached to the swinging member 178. This lever 111 is
When the biasing plate 175 is in the biased position, it is pushed up by the cam action surface 175b of the biasing plate 175 as shown in FIG.
is configured to separate from the teeth of the

113 is a tension spring member, which is connected to the swinging member 17.
8 is biased clockwise around the crankshaft 171. 114 is a holding claw, and the twist spring 11
6 in a counterclockwise direction about the pin 115 and engages with the teeth of the ratchet wheel 174. 13
3 is an output shaft of a motor (not shown), and one end of this output shaft 133 is provided with an arm 137 to which a roller member 139 is rotatably attached. A storage spring 179 is stretched between a spring hook 181 of the crank arm 173 attached to the crankshaft 171 and a spring hook rod 182.

FIG. 9 shows the storage spring 179 locked in the biased position. When the lock is released, the energy storage spring 179 moves the crankshaft 171 through 180° while releasing energy.
Slightly more rotation is required to close the breaker. Furthermore, when the energy storage spring 179 is deenergized, the shear disconnection mechanism of the sheath cutter causes the
An appropriate limit switch is activated, and the arm 137 is rotated clockwise by a drive motor (not shown), causing the energy storage spring 179 to be activated.

In the conventional breaker as described above, one end of the energy storage spring 179 is connected to the crank arm 173, and the crank arm 173 and the ratchet wheel 174 are connected to each other.
Because it is integrated into the crankshaft 171,
When the energy storage spring 179 is released and the shutter breaker is closed, the ratchet wheel 174 and the crank arm 173, which are relatively heavy, are also rotated together. A part of the input energy is absorbed by the ratchet wheel 174 and the crankshaft 171, resulting in a disadvantage that the input speed of the breaker is reduced.

This invention was made in order to improve the above-mentioned drawbacks of the conventional circuit breaker, and it prevents the input energy when the energy storage spring is released from being absorbed by other members to prevent the contact opening operation. The aim is to provide an air leak and disconnection device that prevents speed reduction.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side cross-sectional view showing an example of a pneumatic cutter and disconnector according to the present invention.

In the figure, 1 is a housing, 2 is a storage section unit case, and 3 is a current carrying section unit case. The energy storage unit case 2 is located on the front side (left side) of the housing 1, and the current carrying unit unit case 3 is located on the front side (left side) of the housing 1.
are located on the rear side (right side) of the housing 1 and are fixed to a side plate 4 that constitutes a part of the housing 1. Reference numeral 5 denotes an arc extinguishing chamber having a plurality of arc extinguishing plates 6, which are engaged with the current-carrying unit case 3, and 7 is a storage case for an electric control unit such as a tripping relay.

Next, the configurations of the energy storage section and the energizing section will be explained in detail. Reference numeral 11 denotes an operating handle arranged in a forward-leaning position on the housing 1, the operating end 11a of which protrudes from the upper part of the front face 1a of the energy storage unit case 2, and the base end 11b of the handle 11 that extends from the front face 1a of the housing 1. It is rotatably supported on the energy storage unit case 2 with a shaft 12 provided at a position close to the lower part,
Furthermore, between the base end portion 11b and the housing 1 side,
As shown in FIG. 2, a spring 13 for returning the handle is hung. Reference numeral 14 in FIG. 1 is a ratchet disposed coaxially with the shaft 12, and reference numeral 15 is a ratchet pivotally connected to the base end 11b of the handle 11, and a pressing spring 1.
6 (FIG. 2) is a movable pawl that receives a pressing spring force, and intermittently drives the ratchet 14 counterclockwise when the handle 11 is pressed down. Reference numeral 17 denotes a cam coaxially with the ratchet 14 and integrally connected thereto with a stopper pin 18, etc., and this cam 17 can also be driven by a motor (not shown). Reference numeral 19 denotes a locking pawl that is pivotally connected to the pivot of a charge lever, which will be described later, to prevent the ratchet 14 from rotating back.

A charge lever 20 extends from the rear of the cam 17 to above the cam 17 and is rotatably supported on a shaft 21 above the cam 17.
A roller 22 that rolls into contact with the cam 17 is attached to its lower end 20a, and the charge lever 20 is removably engaged with a stopper such as a pin 23 formed on the cam 17 when pressure accumulation is completed. A blocking piece 24 is integrally formed. Furthermore, when the pressure accumulation is completed, there is a gap between the cam surface 17a of the cam 17 and the opposing contact surface of the charge lever 20, that is, the front surface 22a of the contact roller 22.
As shown in FIG. 8C, when the ON operation is performed, which will be described later, the charge lever 20 is released as the energy storage spring 30 is released.
A head G is provided to allow the shaft to rotate clockwise around the shaft 21 and return to its original state.

A closed arm 26 whose upper end 26a is rotatably supported on a shaft 25 is disposed behind the lower end 20a of the charge lever 20 in FIG. It is connected to the lower end via a link 27.

28 and 29 are connection pins in the link 27. Reference numeral 30 denotes an energy storage spring disposed at the lower end side of the rear (right side) of the housing 1, and a compression coil spring is used. One end 30a and the other end 30b of this spring 30 are connected to the closed arm 2, respectively.
6 on the lower end 26b side and the housing 1 side, a pin 31,
It is pivotably mounted at 32. A spring holder 33 is used to smoothly compress and deform the spring 30.

A link 35 is rotatably supported on the pivot shaft 25 of the closed arm 26, and is pushed up by a push-up piece 34 on the upper end side of the closed arm 26 and displaced in an arc shape when the spring force of the spring 30 is applied. ing. 36 is a pin provided on the displacement end side of the link 35 and pushed up by the push-up piece 34; 37 is an arcuate guide hole formed in the case 2 into which the pin 36 is fitted; 38 is the closed guide hole; This is a pin that prevents the arm 26 from rotating clockwise. 39,4
0 is a pair of links arranged in the vertical direction above the closed arm 26 and bendably connected with a pin 41, and the link 40 on the lower side
The lower end of is connected to the pin 36. 42
is a pivot located above these links 39 and 40, that is, in the front (left side) of the current-carrying part case 3, and is fixed thereto, and 43 is a direction change lever rotatably supported on the shaft 42. , the upper link 39 of the pair of links 39, 40 is connected to the lower end 43a of the lever 43 via a connecting pin 44.
A pin 4 is connected at its upper end, and to its upper end 43b is connected one end of an insulating link 45 that constitutes a part of a contact opening/closing mechanism on the current-carrying part side, which will be described later.
It has 6. The lever 43 and the pair of links 3
Link mechanism 4 for transmitting stored force by 9, 40, etc.
7. Reference numeral 48 indicates a counterclockwise rotation prevention shaft of the lever 43; 49 indicates a rebound prevention piece pivotally connected to the pin 44 at the lower end of the lever 43 to prevent the lever 43 from rebounding; 50 indicates this prevention piece 49; It is a return spring.

51 and 52 are a pair of conductors forming a part of the current-carrying part; 53 is a current transformer equipped on one conductor 51;
54 is a main fixed contact fixed to the tip of this conductor 51. Reference numeral 55 indicates a main movable contact that is brought into contact with and away from the fixed contact 54, 56 indicates a movable element to which the movable contact 55 is fixed, and a flexible conductor is provided between the base end of the movable element 56 and the other conductor 52. 57 is connected. A movable element holder 58 holds the movable element 56 via a pivot pin 59. The lower end of this holder 58 is rotatably supported on the case 3 with a pivot 60, and the upper end is rotatably supported on the case 3. pin 6
1 to the other end of the insulating link 45. Contact pressure springs 63 and 64 62 are hung between the movable element 56 and the case 3 side, and apply a spring force to the movable element 56 in the contact closing direction.
are moving arc and fixed arc contacts, respectively, and 6
5 and 66 are holding members for the respective arc contacts 63 and 64, and 67 is a stopper for restricting the rotation of the movable element holder 58. The movable element 56, the holder 58, the insulating link 45, and the like constitute a contact opening/closing mechanism 69 (see FIGS. 6 and 7). 70 and 71 are partition walls.

Above the charge lever 20, a pivot 72 is provided.
A box-shaped input latch 7 rotatably pivoted to
3 are arranged. The lower end 7 of this latch 73
At the tip of 3a, there is an upper end 20b of the lever 20.
A notch 75 is formed to receive the clockwise pressing force of the locking roll 74 fixed to the locking roll 74, and the pressing force is set so as to resist the clockwise spring force of the return spring 76 when the pressure accumulation is completed. (See Figure 4). A latch 77 has a D-shaped cross section and detachably locks the upper end 73b of the closing latch 73 to prevent counterclockwise rotation, and is rotatably attached to the case 2. The above input latch 7
3, etc., constitute a contact close standby maintenance mechanism 78. The D-shaped latch 77 is rotated counterclockwise by an ON operation member 79 (FIG. 3) that releases the closed standby state.

80 is a tripping latch rotatably supported on the pivot shaft 72 of the closing latch 73 and receiving the counterclockwise spring force of the return spring 76 (FIG. 4); 81 is the tripping latch 80; axis 82 below
This is a cam plate which is rotatably supported with a cam plate and is biased by the counterclockwise spring force of a return spring 83 shown in FIG. It has a recessed portion 85 that removably engages with the roll 84, and applies a clockwise pressing force to the tripping latch 80 against the return spring force thereof. 86 in FIG. 1 is the pin 87 of the cam plate 81 and the pair of links 39, 40 mentioned above.
This is a tensioning link connected between the connecting pin 41 at. 88 is the above tripping latch 80
It is a latch with a D-shaped cross section that prevents rotation in the time direction, and is rotatably attached to the case 2.
Together with the contact pressure spring 62 and the like, it constitutes a contact open standby maintenance mechanism 89 that extends the link mechanism 47 against the spring force of the contact pressure spring 62. Above D type latch 8
8 is adapted to be rotated clockwise by an OFF operating body 90 shown in FIG. In FIG. 3, 91 is a spring for automatic return of the D-shaped latches 77 and 88, and 92 and 93 are the D-shaped latches 77, respectively.
and 88 are operated pieces, 94 and 95 are stoppers, and 96 and 97 are push rods.

Next, the operation of the above configuration will be explained.

() When accumulating energy in the energy storage spring: First, when the handle 11 in Fig. 1 is pressed down against the return spring force, the movable pawl 1
5 rotates the ratchet 14 counterclockwise,
As a result, the cam 17 is also rotated in the same direction, so the charge lever 20 is rotated counterclockwise about its shaft 21 via the roller 22 that is in rolling contact with the cam surface 17a (Fig. 8A). reference).
This rotational displacement of the charge lever 20 in the counterclockwise direction causes the closed arm 26 to be rotationally displaced in the counterclockwise direction around the shaft 25 via the link 27, so that compression of the energy storage spring 30 is started. The energy storage spring 30 is further compressed and deformed by repeating the handle operation.

Press down the handle 11 a predetermined number of times,
For example, by repeating this several times, the cam 17 is rotated slightly counterclockwise from the maximum displacement position of the charge lever 20 (see FIG. (Figure 8 C)
(see FIG. 1), the rotation of the cam 17 is blocked and the pressure accumulation operation of the energy storage spring 30 is completed (see FIG. 1).

When the pressure accumulation operation is completed, the extension spring force of the energy accumulation spring 30 moves the charge lever 20 to the shaft 21 via the closed arm 26 and the link 27.
I am trying to rotate it clockwise. Therefore, the locking roll 74 at the upper end of the charge lever 20 presses the lower end notch 75 of the closing latch 73, and attempts to rotate the closing latch 73 counterclockwise against the return spring force. However, due to the counterclockwise rotational force, the upper end 73b of the closing latch 73 is pushed against the D-shaped latch 77.
, the charging latch 73 is rotated counterclockwise, in other words, the charge lever 20
clockwise rotation is prevented (see FIGS. 4 and 8C). Therefore, link mechanism 4
The upward force of the closed arm 26 against the pin 36 at 7 is also prevented, and the link mechanism 47
The state in which the contacts 54 and 55 are closed is set to the standby state.

() At the time of ON operation: First, operate the ON operation body 79 shown in Figure 3 against the return spring force to rotate the D-type latch 77 counterclockwise. Since the latch 73 rotates counterclockwise, the sixth
As shown in the figure, the locking roll 74 of the upper end 20b of the charge lever 20 is disengaged from the notch 75 of the closing latch 73, and the charge lever 20 is rotated clockwise under the force of the stored spring. Therefore, the closed arm 2
6 is also rotated clockwise around its axis 25.
When the closed arm 26 rotates in response to the force of the stored spring, the push-up piece 34 of the closed arm 26 pushes the pin 36 into the guide hole 37.
, the pair of links 39 and 40 are also displaced upward while in the extended state.

The upward displacement of the links 39 and 40 causes the direction change lever 43 to rotate clockwise. This rotational force of the lever 43 is transmitted to the contact opening/closing mechanism 69 via the insulating link 45. That is, since the holder 58 of the movable element 56 is rotated clockwise about its shaft 60, the movable contact 55 comes into contact with the fixed contact 54 against the spring force of the contact pressure spring 62, and the contact is in the closed state. becomes. In this state, the energy storage spring 30 is released, and the contact pressure spring 62 is compressed and energy is stored.

The energy storage spring 30 is released, and the contact 5
4 and 55 are closed, the contact pressure spring 62
The spring force that tends to expand causes the direction change lever 43 to rotate counterclockwise around the shaft 42 via the movable element 56, the holder 58, and the insulating link 45.

By the way, since the direction change lever 43 is receiving rotational force in the counterclockwise direction, the pair of links 39 and 40 connected to this lever 43 are receiving a pressing force in the right direction. , the cam plate 8 via the link 86 shown in FIG.
1 receives a rotational force in the clockwise direction around the shaft 82. Therefore, the cam plate 81 has its return spring 83
The trip latch 80 is pushed up against the spring force of the D-type latch 88, and a clockwise rotation force is applied to the trip latch 80.
is being prevented. Therefore, the engagement state between the recessed portion 85 and the locking roll 84 is maintained, and the tensile force by the latch 86 acts on the links 39 and 40, so that the links 39 and 40 are brought into contact. It is maintained in a stretched state against the tension force of the pressure spring 62. In other words, the contact open standby state is set.

() At the time of OFF operation: First, operate the OFF operating body 90 shown in Fig. 3 against the return spring force to rotate the D-shaped latch 88 clockwise. As the latch 80 is slightly rotated clockwise, the engagement between the locking roll 84 of the latch 80 and the recess 85 of the cam plate 81 is released. Therefore, the cam plate 81 is rotated clockwise as shown in FIG. 7 against the return spring force. Therefore, the tensioning action of the link 86 is reduced, and the pair of links 39 and 40
The stretching force caused by 2 causes the body to bend into a state of collapse. This causes the contacts 54 and 55 to be opened.

The open state of the contacts 54 and 55, that is, the seventh
In the state shown in the figure, if the above-mentioned handle operation is performed again to accumulate pressure in the energy storage spring 30, the links 39 and 40 will expand while being displaced downward, and the cam plate 81 will release its return spring. Since the force causes rotational displacement in the counterclockwise direction, the recessed portion 85 of the cam plate 81 engages with the locking roll 84 of the tripping latch 80, resulting in the state shown in FIG. 1.

Here, when the handle 11 is pressed down a predetermined number of times, the contact surface 22a of the charge lever 20 separates from the maximum intonation region P (FIG. 8A to C) of the cam surface 17a, and the pressure accumulation is completed. At the same time, the pin 23 of the cam 17 is connected to the charge lever 2.
Since the cam 17 is brought into contact with the blocking piece 24 of 0, the rotation of the cam 17 is stopped, thereby locking the handle 11 from being pressed down, so that the completion of the pressure accumulation can be easily recognized. In addition, since a head G exists between the cam surface 17a and the rolled contact surface 22a of the charge lever 20 in the pressure accumulation completion state, the charge lever 20 is allowed to rotate clockwise during the ON operation, and as described above. The engagement relationship between the pin 23 and the blocking piece 24 is released, and the pressure accumulation standby state is automatically returned.

Further, since the blocking piece 24 is integrally formed with the charge lever 20, there is an advantage that it can be manufactured easily.

As described above, the present invention includes integrally forming on the charge lever a blocking piece that is removably engaged with the stopper of the cam that accumulates pressure in the pressure spring via the charge lever at the same time as the completion of pressure accumulation in the energy accumulation spring, and when the charge lever is turned ON. When the contact closed standby maintenance state is released, a drop is formed between the cam and the charge lever at the time of completion of pressure accumulation to allow the charge lever to return to the charge position due to release of the energy storage spring. This not only significantly improves the operability of accumulating pressure in the accumulating spring using the handle, but also
When the energy storage spring is used to close the heat storage spring or the disconnector, the energy storage spring and the cam, which is integrated with the shaft incorporating other parts, can be separated, so that the energy when the heat storage spring is released is reduced. There is no absorption by the cam and shaft, and there is no reduction in the input speed of the breaker.

[Brief explanation of drawings]

Fig. 1 is a side cross-sectional view showing an example of the pneumatic cutter and disconnector according to the present invention, Fig. 2 is an explanatory view of the handle shaft, Fig. 3 is a schematic configuration diagram of the ON and OFF operation parts, and Fig. 4 is an explanatory diagram of the contact closed standby maintenance mechanism, Fig. 5 is an explanatory diagram of the contact open maintenance mechanism, and Fig. 6 is an explanatory diagram of the contact closed standby maintenance mechanism.
Figure 7 is a diagram of the operating state during operation, Figure 8 is an illustration of the operation of the charge lever, Figure 9 is a schematic configuration diagram showing the main parts of a conventional cutter. , FIG. 10 is an explanatory diagram of the operation, and FIG. 11 is an exploded perspective view of the main constituent members. 1... Housing, 11... Handle, 12... Pivot, 17... Cam, 17a... Cam surface, 20...
Charge lever, 22...Rotated contact roller, 22a
...Rotated contact surface, 23... Stopper, 24... Blocking piece, 30... Accumulating spring, 73... Closing latch,
77...D-type latch, 78...Contact close standby maintenance mechanism, 79...ON operating body, G...Head, P...
Maximum intonation area. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A handle that is rotatably supported on the breaker housing, a cam that is rotationally driven by the operation of the handle, and a charge lever that is rotationally displaced by the rolling contact of the cam and accumulates pressure in the energy storage spring. When the pressure accumulation operation of the above-mentioned handle is performed a predetermined number of times, the contact surface of the charge lever leaves the maximum intonation area of the cam surface and pressure accumulation is completed, the charge lever is rotated by the D-type latch driven by the ON operating body. A blocking piece is integrally formed on the charge lever, and a blocking piece is integrally formed on the charge lever, and the blocking piece is provided with a box-shaped closing latch that prevents the movement and maintains the contact close standby state, and is removably engaged with the stopper of the cam at the same time as the pressure accumulation is completed; When the contact closed standby maintenance state is canceled by the ON operation, a drop is created between the cam and the charge lever when the pressure accumulation is completed to allow the charge lever to return to the charge position due to the release of the energy storage spring. I feel anxious and disconnected.