JPH021003Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an air conditioner configured to close a contact of a breaker using a spring force released from an energy storage spring that can store the spring force for closing a contact of a breaker. The present invention relates to an insulator and a disconnector, and more specifically, to an operating mechanism for accumulating pressure in an energy accumulating spring.

Conventionally, as disclosed in Japanese Patent Publication No. 54-39910, this type of shear disconnector transmits the rotational force of a motor to the crankshaft via a ratchet pawl and a ratchet wheel. The rotational force is configured to act as an accumulated force in the energy storage spring via the crank arm, and the engagement between the ratchet pawl and the ratchet wheel is automatically released when the accumulation of pressure in the energy storage spring is completed. An electric accumulator type is known.

Since the above configuration is an electric pressure accumulation type, it is easy to release the engagement between the ratchet pawl and the ratchet wheel using a clutch when the accumulation of pressure in the energy storage spring is completed. By releasing the spring force, it is possible not only to prevent damage to the ratchet pawl and ratchet wheel when performing a predetermined contact closing operation, but also to significantly reduce the impact force applied to the motor.

However, a clutch such as that used in the electric pressure accumulation type described above is provided in a manual pressure accumulation type that uses the crank structure as described above and is configured to accumulate pressure in the energy storage spring by manual handle operation. Then, the pressure accumulation operation becomes complicated and troublesome.
Another problem is that if the clutch is forgotten to operate, an unexpected impact force is applied to the components, which can easily cause deformation or damage.

This idea was made to solve the problems mentioned above, and although it is a manual pressure accumulation type that can be operated easily and easily with a single handle, it is possible to easily operate the pressure accumulation with a single handle. It is an object of the present invention to provide an air breaker or disconnector that can reliably prevent deformation or damage due to collision of component parts for maintaining a contact closed standby state by means of a simple construction. .

An embodiment of this 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 this 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 left side of the front side of the housing 1, and the current carrying unit case 3 is located on the right side of the rear side of the housing 1. are fixed respectively. 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 configuration of the energy storage section and the current supply 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 surface 1a of the energy storage unit case 2;
The base end portion 11b is rotatably supported on the energy storage unit case 2 with a shaft 12 provided at a position close to the lower part of the front surface 1a of the housing 1, and furthermore, the base end portion 11b and the base end portion 11b are There is a second
As shown in the figure, a spring 13 for returning the handle is hung. 14 is a ratchet disposed coaxially with the shaft 12, and 15 is the handle 11.
The pressing spring 16 is pivotally connected to the base end 11b of the
This is a movable pawl that receives the pressing spring force shown in FIG. 2, and is used to intermittently drive 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 cam 7 is attached to its lower end 20a, and furthermore, when pressure accumulation is completed, cam 1
A blocking piece 24 that comes into contact with the pin 23 of No. 7 is integrally provided in a protruding manner. 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, and this closed arm 26 is linked to the lower end of the charge lever 20. They are connected via 27. 28 and 29 are connecting pins in the link 27. Reference numeral 30 denotes an energy storage spring disposed on the lower right end side of the rear portion of the housing 1, and a compression coil spring is used. One end 30 of this spring 30
The a and other end 30b sides are pivotally attached to the lower end 26b side of the closed arm 26 and the housing 1 side with pins 31 and 32, respectively. A spring holder 33 is used to smoothly compress and deform the spring 30.

The pivot shaft 25 of the closed arm 26 is rotated when the closed arm 26 is biased by the spring force of the spring 30.
A link 35 that is pushed up by a push-up piece 34 on the upper end side of the link 6 and displaced in an arc shape is rotatably supported. 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 39, 40, that is, in front of the current-carrying part case 3, and is fixed thereto;
Reference numeral 3 designates a direction changing lever rotatably supported on the shaft 42, and a lower end 43a of this lever 43 is connected to the pair of links 3 via a connecting pin 44.
A pin 46 is connected to the upper end of the upper link 39 at 9 and 40, and to the upper end 43b is connected to one end of an insulating link 45 that constitutes a part of the contact opening/closing mechanism on the current-carrying part side, which will be described later. has.
The pair of links 39, 40 and the like constitute a link mechanism 47 for transmitting stored force. 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, 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 and the like constitute a contact closed standby maintenance mechanism 78. The D-shaped latch 77 is rotated counterclockwise by an ON operation member 79 (FIG. 3) which releases the closed waiting mechanism 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
This is a latch with a D-shaped cross section that prevents clockwise rotation of the latch, and is rotatably attached to the case 2, and is attached to the tripping latch 80 and the cam plate 81.
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 Figure 3, 9
1 is a spring for automatic return of the ON and OFF operating bodies 79 and 90, 92 and 93 are operated pieces provided on the D-shaped latches 77 and 88, respectively; 94 and 9
5 is a stopper, 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. 17 is also rotated in the same direction, so the cam surface 1
The charge lever 20 is rotated counterclockwise about its shaft 21 via the roller 22 which is in rolling contact with the charge lever 7a (see FIG. 8A). 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.

By pressing down the handle 11 a predetermined number of times, for example, several times, the cam 17 is rotated slightly counterclockwise from the position where the charge lever 20 is maximally displaced (see FIG. 8B). , the pin 23 hits the blocking piece 24 on the charge lever 20 (see FIG. 8C), and the cam 1
7 is blocked, and the pressure accumulating operation of the energy accumulating spring 30 is completed (see Fig. 1).

When the pressure accumulation operation is completed, the extension spring force of the energy accumulation spring 30 is applied to the closed arm 26 and the link 27.
The charge lever 20 is about to be rotated clockwise around the shaft 21 through the . For this reason,
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 its return spring force. However, due to the counterclockwise rotational force, the upper end 73b of the closing latch 73 is locked to the D-shaped latch 77, so that the counterclockwise rotation of the closing latch 73, in other words, the charge lever 20 clockwise rotation is prevented (see FIGS. 4 and 8C). Therefore, the upward force of the closed arm 26 against the pin 36 in the link mechanism 47 is also blocked, and the contacts 54 and 55 are set in a standby state to be closed via the link mechanism 47.

() At the time of ON operation: First, operate the ON operating body 79 shown in Fig. 3 against the return spring force to rotate the D-type latch 77 counterclockwise, and then turn on from the state shown in Fig. 8 C. As the latch 73 rotates counterclockwise, 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, as shown in FIG. Receive it and rotate it clockwise. Therefore, link 27
The closed arm 26 is also rotated clockwise around its shaft 25 via the . When the closed arm 26 rotates in response to the stored spring force, the push-up piece 34 of the closed arm 26 pushes the pin 36 upward along the guide hole 37, so that the pair of links 39, 40 is 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, the mover 56
Since the holder 58 is rotated clockwise about its axis 60, the movable contact 55 is moved by the contact pressure spring 62.
It comes into contact with the fixed contact 54 against the spring force of , and the contact is in a closed state. 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 contacts 54,
55 is closed, the spring force of the contact pressure spring 62 is applied to the mover 56 and the holder 5.
8. Direction change lever 43 via insulated link 45
A force is acting to rotate the shaft counterclockwise around the shaft 42.

However, since the direction change lever 43 is receiving rotational force in the counterclockwise direction, this lever 43
A pair of links 39 and 40 connected to each other are receiving a rightward pressing force, and this pressing force causes the cam plate 81 to rotate clockwise around the shaft 82 via the link 86 shown in FIG. receive power. Therefore, the cam plate 81 pushes up the trip latch 80 against the spring force of the return spring 83, and the trip latch 80 is pushed up against the spring force of the return spring 83.
0, but this rotational force is blocked by the D-shaped latch 88. 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, by operating the OFF operating body 90 shown in Fig. 3 against the return spring force and rotating the D-shaped latch 88 clockwise, the tripping latch will be released from the state shown in Fig. 5. 80 is rotated slightly clockwise against the return spring force, so that the locking roll 84 of this latch 80
The engagement between the cam plate 81 and the recessed portion 85 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
Due to the stretching force caused by this, the body bends to the point where it collapses. This causes the contacts 54 and 55 to be opened.

When the contacts 54 and 55 are in the open state, that is, in the state shown in FIG. 7, if the aforementioned handle operation is performed again to accumulate pressure in the energy storage spring 30, the links 39 and 40 will be displaced downward. As the cam plate 81 is rotated counterclockwise by the return spring force, the recessed portion 85 of the cam plate 81 engages with the locking roll 84 of the trip latch 80, as shown in FIG. The state will be as follows.

By the way, just before the pressure storage of the energy storage spring 30 is completed,
Maximum intonation point P on cam surface 17a of cam 17
(FIG. 9) and a locking roll 74 at the upper end of the charge lever 20 rotated counterclockwise around the shaft 21 and a lower end notch 75 of the box-shaped closing latch 73. A gap G as shown in FIG. 8B is provided to prevent the upper end 73b of the closing latch 73 from coming into contact with the D-shaped latch 17 until the accumulation of pressure in the energy storage spring 30 is completed. In other words, at the same time as the pressure accumulation is completed, the upper end 73 of the closing latch 73
b collides with the D-shaped latch 17 against the return spring force. If this collision is severe, the D-shaped latch 77 may be rotated inadvertently or damaged.

Therefore, in the configuration of this invention, as shown in FIG. 9, the charge lever 20 on the cam surface 17a is
The height H of the cam surface 17a is gradually reduced by gradually reducing the curvature (curvature R _P > R _Q ) from the maximum intonation point P to the rear contact/disengagement end Q in the rotational direction (direction of arrow a). It has been set.

With this configuration, in a state where the amount of intonation of the charge lever 20 from passing the maximum intonation point P to the disengagement end Q is gradually reduced,
Since the roller 22 of the charge lever 20 separates from the disengagement end Q, the upper end 7 of the closing latch 73
3b suddenly collides with the D-shaped latch 77, thereby effectively preventing the D-shaped latch 77 from being inadvertently rotated and being damaged.

As described above, according to this invention, the simple structure of simply changing the curvature of the cam surface of the cam for rotating the charge lever and rotating it allows for maintaining the contact close standby state. To reliably prevent deformation and damage of the closing latch and D-type latch, which are component parts, due to impact, and also to prevent loss of the function of maintaining the contact close standby state due to unexpected rotation of the D-type latch. Can be done. Therefore, it does not have a clutch etc.
Although pressure can be easily accumulated by operating a single handle, it prevents deformation and damage of component parts, as well as inadvertent rotation of the D-type latch, which is the most important element in maintaining the contact close standby state. The present invention has the effect that the closing operation of the shield disconnector using the stored spring force can be performed appropriately and stably regardless of long-term use.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing an example of an air vent and disconnector according to this invention, Fig. 2 is an explanatory diagram 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 7 is a diagram of the operating state during OFF operation, Figures 8 A to C are illustrations of the operation of the charge lever, and Figure 9 is an illustration of the cam surface of the cam, which is the main part of this invention. It is. 1... Housing, 11... Handle, 12... Pivot, 17... Cam, 17a... Cam surface, 20...
Charge lever, 30... Accumulation spring, 73... Closing latch, 77... D-type latch, 78... Contact closing standby maintenance mechanism, H... Height, P... Maximum intonation point, Q... Conversion contact Departing end, R _P , R _Q ... curvature. In addition,
The same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A handle that is pivotally supported in a reciprocating manner on the breaker housing, a cam that is intermittently driven to rotate in one direction by the reciprocating rocking of this handle in one direction, and this cam. a charge lever that is in rolling contact with the cam surface of the cam and is rotationally displaced in conjunction with the rotation of the cam in one direction; a storage spring that is compressed and deformed by the rotational displacement of the charge lever to accumulate pressure; and one end of the charge lever. It has a locking part at one end that can come into contact with and separate from the other end, and when the charge lever rotates in a direction opposite to the pressure accumulation direction in response to the pressure accumulation spring force of the energy accumulation spring of the charge lever, it is pressed by one end of the charge lever and is subjected to the return spring force. a square-shaped closing latch that rotates in the opposite direction, and a locking latch that locks on the other end of the closing latch when the accumulation of pressure in the accumulating spring is completed to prevent rotation of the closing latch and the charge lever; and a D-type latch that maintains the contact close standby state, and gradually reduces the curvature of the cam surface of the cam from the maximum intonation area with respect to the charge lever to the charge lever rotation contact/separation area on the rear side in the rotational direction. the other end of the closing latch until the pressure accumulation of the energy storage spring is completed.
A ventilator and disconnector characterized in that the shape latch is configured so that it does not lock.