JPH077622B2 - Overlap type power supply switching switch - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a power source switching switch for selectively connecting two different power sources to a load, and more particularly to connecting to a load. The present invention relates to a power source switching switch capable of creating an overlap state in which both power sources are connected to a load at the same time so that the load side does not experience a power failure even when the power source is switched.

(Prior Art) The applicant has previously described, for example, Japanese Utility Model Application No.
80242) proposed a power supply switching switch. this is,
The control shaft in the substantially V-shaped guide hole is moved back and forth in a V-shape in response to the swing of the operating lever, and the movable contact is interlocked with this control shaft to form fixed contacts on two different power sources. On the other hand, the power source is switched by alternately connecting and disconnecting them alternately.

(Problems to be Solved by the Invention) In the above conventional power supply switching switch, when the A and B2 power supplies are alternately switched, an instantaneous power failure occurs in which neither the A nor the B power supply is connected to the load. .

In facilities such as broadcasting stations and hospitals where instantaneous power outages are not permitted, power is supplied from the same power company using two lines.
The purpose of the power source switching switch as described above is diminished.

Therefore, the present invention is a power supply capable of creating an overlap state in which both power supplies are simultaneously connected to the load so that the load side does not instantaneously lose power when the two power supplies connected to the load are switched. It is an object to provide a switching switch.

(Means for Solving the Problems) In the present invention, in order to solve the above problems, an operating lever 3 that is swiveled by a manual or electric operation and is instantly recoverable by a spring force, and a swiveling motion of the operating lever 3. Accordingly, the left and right inclined passages 12a of the substantially V-shaped guide hole 12 are
A switching roller 11 that can be moved up and down along 12b and is located in the center of the guide hole 12 at the restoration position of the operation lever 3, and the switching rollers 11 are alternated between the left and right inclined passages 12a, 12b of the guide hole 12.
Alternate left and right ramps 12a, 12 to raise and lower along
The point plate 15 that closes b and the switching roller 11 are
When moving upward along the right or left inclined passages 12a, 12b of the operating shaft 2 against the restoring spring, they are pushed by them.
A pair of left and right control levers 22 and 23 whose right and left turns are centered around 0 and 21, and the tips rise alternately, and the tips of the control levers 22 and 23 are interlocked with the alternating rotation of the control levers 22 and 23. Is connected to the power source side fixed contacts 37 and 38 and the load side fixed contactor 39 respectively when the control levers 22 and 23 are at the lower side, respectively. Side contact 3
Movable contact 33,34 which separates 7,38 and load side contact 39
And the control levers 22 and 23 rotate together, and the control levers 22 and 23 move up and down the tip alternately so that one end of each is
A pair of left and right latch levers 26, 27 fixed on 20, 21,
While the positions of the tips of these latch levers 26, 27 are switched up and down, the pair of latch levers 26, 27 are momentarily controlled so that the tips of the latch levers 26, 27 are simultaneously in the raised position.
A latch plate 28 pivotally attached to the left and right is provided between 26 and 27, and the latch plate 28 is pushed by the tip of one of the descending latch levers 26 and 27 to the other latch lever. 27,
One latch lever that is inclined to the 26 side and is in the lowered position
A cam that abuts against the tips of the latch levers 26 and 27 and maintains its tilted state, and abuts against the other latch levers 27 and 26 until the tips of the latch levers 26 and 27 come to the raised position and holds the lifted position. The surfaces 28a and 38b are provided to form an overlap type power source switching switch.

(Operation) When the operating lever 3 is swung by manual or electric operation in order to switch the power source connected to the load from the A power source to the B power source, the switching roller 11 follows the guide hole 12 having a substantially V-shape. It rises along one of the inclined passages 12a (Fig. 7A). The ascending direction is alternately the left and right inclined passages 12a,
The point plate 15 that closes 12b changes alternately left and right. The operation lever 3 and the switching roller 11 are instantly restored by the spring force (Fig. 8A). When pushed by the ascending switching roller 11, the one control lever 23 turns counterclockwise in FIG. 6 and the tip thereof rises, and at the same time the one operation shaft 21
Rotates (Fig. 7B). In conjunction with the rotation of the operating shaft 21,
One movable contact 34 connects the B power source side fixed contact 38 and the load side fixed contact 39 (FIG. 7D). During this time, one latch lever 27 is also turned counterclockwise in FIG. 6 in conjunction with the control lever 23, and the tip thereof is raised (FIG. 7C). As it rises, its tip will move to the cam surface 28 of the latch plate 28.
away from a, the latch plate 28 loses its support (Fig. 7C),
At the same time that the other latch lever 26 is allowed to descend, the other latch lever 26 inclines toward the one latch lever 27 side and holds the elevated position of the tip of the one latch lever 27 (Fig. 8C). Until the tip of one latch lever 27 rises and the tip of the other latch lever 26 descends, both tip ends of both latch levers 26, 27 are in the raised position (FIG. 7C), that is, A Thus, a state in which both the B and B power supplies are connected to the load side (FIG. 7D) is obtained. Then, when the tip of the other latch lever 26 descends (Fig. 8C), the tip comes into contact with the right cam surface 28b of the latch plate 28, and the tip of the latch lever 26 latches again until it reaches the raised position. The left tilted state of the plate 28 is maintained.

Next, in order to switch the power source from the B power source to the A power source, the operation lever 3 is swung by manual or electric operation, and accordingly, the switching roller 11 tilts the guide hole 12 on the left side in FIG. Ascend along the passage 12b.
This is because the inclined passage 12a is closed by the point plate 15. When pushed by the ascending switching roller 11, the control lever 22 on the right side pivots clockwise, the tip of the lever 22 ascends, and the operating shaft 20 rotates. In conjunction with the rotation of the operating shaft 20,
The movable contact 33 on the right side connects the A power source side fixed contactor 37 and the load side fixed contactor 39. During this time, the right side latch lever 26 is also turned in conjunction with the control lever 22, and the tip thereof is raised. As it rises, the tip of the cam surface 28a of the latch plate 28
After that, the latch plate 28 loses its support and allows the left latch lever 27 to descend, and at the same time, it inclines to the right side and holds the elevated position of the tip of the latch lever 26. Until the tip of the right latch lever 26 rises and the tip of the left latch lever 27 descends, the tips of both latch levers 26, 27 are both in the raised position, that is, both power supplies A and B The state of being connected to the load side is obtained.

In this way, when switching the power supply of A and B,
A condition in which both power sources are connected to the load is always created, and therefore power supply to the load is not interrupted even for an instant.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a switch according to the embodiment with a partial cover removed, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, FIG. 3 is a sectional view taken along the line III-III of FIG. 1, and FIG. FIG. 5 is a right side view in FIG. 3, FIG. 5 is a sectional view taken along line VV in FIG. 1, and FIGS. 6 to 8 are explanatory views showing an operation process.

As shown in FIG. 1, the switch of this embodiment comprises an operating mechanism section 1 and a charging section 2.

In the operation mechanism section 1, the operation lever 3 is pivotally attached to the mechanism frames 5a and 5b by a shaft 4. The middle portion of the operating lever 3 is pivotally attached to the tip of the pull-in pin 8 of the solenoid 6 by the pivot pin 7, and the other end is pivoted by the pivot shaft 9.
It is pivotally attached to one end of 10. Pin 8 of solenoid 6 is
It is always urged in the pulling direction by the internal spring.
Therefore, when the solenoid 6 is energized, the pull-in pin 8 projects and instantly restores, during which the operating lever 3 rotates clockwise in FIG. 2 to restore. The first
The figure shows the protruding state of the pin 8. A switching roller 11 is attached to the other end of the closing lever 10, and an intermediate portion of the switching roller 11 has a substantially V-shaped guide hole formed in the mechanism frame 5a.
12 through which the mechanism frame 5a
It projects to the opposite side.

As shown in FIG. 2, the switching unit 13 is located above the guide hole 12 and provided on the mechanism frame 5a.
The switching unit 13 is for alternately switching between the right and left of the path in the guide hole 12 in which the switching roller 11 rises as the operation lever 3 is reciprocally rotated by the solenoid 6. In addition,
In FIG. 1, the switching unit 13 is shown by a virtual line for convenience of explanation. In FIG. 2, the frame 14 of the switching unit 13 is fixed on the mechanism frame 5a.
A point plate 15 is pivotably attached to the point 14. The tip of the point plate 15 projects inward from the center upper part of the guide hole 12, and when tilting left and right, substantially closes the left or right tilt passages 12a, 12b of the guide hole 12 to make the switching roller 11 Hinder the rise. The body plate 16 is pivotally supported coaxially with the point plate 15 and is pushed by the switching roller 11 that moves up the inclined passages 12a, 12b on the left or right of the guide hole 12 to swing substantially left and right integrally with the point plate 15. To do. The body plate 16 is a spring via a connecting rod 17.
It is rotationally biased by 18. Then, the spring 18 is configured to switch the biasing direction with respect to the body plate 16 beyond the dead center while the body plate 16 is being swung to the left or right. Therefore, for example, as shown in FIG. 2, when the switching roller 11 rises along the left side inclined passage 12a, the body plate 16 is pushed by this and the body plate 16 stores the spring 18 and is integrated with the point plate 15. Rotate in the direction. During this time, the spring 18 releases the force beyond the dead center, and this time rotates the body plate 16 in the clockwise direction. Although the switching roller 11 descends instantly, the point plate 15 maintains its inclined state by the spring force, and therefore the point plate 15
Closes the inclined passage 12a on the left side of the guide hole 12.
The descending switching roller 11 then rises along the right-side inclined passage 12b (since the left-side inclined passage 12a is closed by the point plate 15, the upward movement to this side is blocked). Stand by at the center of the guide hole 12.

As shown in FIGS. 3 and 4, on the charging portion 2 side of the mechanism frame 5a, a pair of operation shafts 2 located on both sides of the guide hole 12 are provided.
One ends of 0 and 21 are rotatably supported. Operating axis 20,21
Penetrates through the charging unit 2 and is rotatably supported on the outer wall of the charging unit 2 at the other end side. The base ends of the control levers 22 and 23 are fixed to the operation shafts 20 and 21, respectively. The tip ends of the control levers 22 and 23 extend so as to engage with the upper part of the switching roller 11, and the switching rollers 1 and 2 are constantly operated by the springs 24 and 25.
It is urged to rotate in the direction of pushing down 1, and the rotation range is restricted by stoppers 40 and 41. Therefore, the control lever 22,2
When the switching roller 11 rises along the left or right inclined passages 12a, 12b, the switch roller 3 is selectively pushed up by this and rotates together with the operation shafts 20, 21. Further, the base ends of the latch levers 26 and 27 are fixed to the operation shafts 20 and 21, respectively, and rotate integrally with the control levers 22 and 23. The latch levers 26, 27 extend toward the intermediate portion between the both, and the tip of the latch lever 26,
27a is rotatably attached. A latch plate 28 is pivotally mounted on the mechanism frame 5a so as to be swingable right and left by a pivot shaft 19 at an intermediate portion between the latch levers 26 and 27, and on the cam surfaces 28a and 28b of the latch plate 28. Further, the rollers 26a and 27a of the latch levers 26 and 27 are constantly in pressure contact. Further, control switches SW1 and SW2 are mounted on both sides of the latch plate 28 on the mechanism frame 5a, and the one on which the latch plate 28 is inclined opens its contact.

In the charging unit 2 shown in FIG. 5, the base ends of the input arms 29, 30 are fixed to the operating shafts 20, 21, respectively. Input arm 29,
The tips of 30 are movable contacts 33, 34 via links 31, 32, respectively.
Is pivotally attached to the middle part of the. The movable contacts 33, 34 are pivotally attached to the insulating portion of the main body by pivot pins 35, 36 on the base end side, and the base end side is always fixed contact on the A power source or the B power source side by an internal spring. It is slidably pressed against the children 37, 38. The contact 39 on the load side is provided in the intermediate portion of the movable contacts 33, 34 on both sides, and the tips of the movable contacts 33, 34 can contact when the movable contacts 33, 34 fall down alternatively.

The power switching operation of this switching switch will be described with reference to FIGS. 6 to 8. 6 to 8 show the process of switching the power source connected to the load from the A power source to the B power source. A, B, and C in each figure show the same operation process. For convenience of explanation, the connecting structure of the operating lever 3 and the solenoid 6 in FIGS. 6 to 8 is different from that in FIGS. 1 and 2, but it is substantially the same. In addition, each figure in FIG. 6 to FIG.
In order to match the left and right positional relationships of A, B, and C, each A figure is shown as a rear view with respect to FIG.

In FIG. 6A, the solenoid 6 is in a non-excited state,
The switching roller 11 is located at the center of the guide hole 12 and
In FIG. B, the control lever 23 on the left side is in a state in which the tip is lowered following the switching roller 11, but the control lever on the right side is
The tip of 22 is held in a raised state. this is,
This is because the roller 26a of the right latch lever 26, which is on the same operation shaft 20 as the right control lever 22, is held on the upper cam surface 28a of the latch plate 28, as shown in FIG. 6C. That is, the latch plate 28 is pressed by the roller 27a of the left latch lever 27 that contacts the left cam surface 28b and is maintained in a state of being inclined to the right side, and the roller 26a of the right latch lever 26 is located above the latch plate 28. It is on the cam surface 28a and cannot descend. At this time, the right control switch SW1 is pushed by the latch plate 28 to open its contact.
The contact of the control switch SW1 is provided between the A-side control terminal 42 which receives the A power-on command signal and the solenoid 6. Then, in FIG. 6C, the right operation shaft 20
The upper closing arm 29 inverts the movable contact 33 to connect the fixed contact 37 on the A power source side and the fixed contact 39 on the load side, and the A power source is supplied to the load.

In order to switch the power supply from the state shown in FIG. 6 to the B power supply,
When sending to the B side control terminal 43 which receives the B power-on command signal,
As shown in FIG. 7A, the control switch SW2 is closed.
The solenoid 6 is excited via the control lever 3, the control lever 3 is rotated clockwise, and the switching roller 11 is pushed up along the inclined passage 12a on the right side of the guide hole 12. That is, at this time, since the inclined passage 12b on the left side of the guide hole 12 is closed by the tip portion of the point plate 15, the switching roller 11 is
It will be pushed up along the right sloped path 12a. At this time, the lower right part of the same body plate 16 is pushed up by the switching roller 11 and rotates counterclockwise together with the point plate 15, this time closing the inclined passage 12a on the right side of the guide hole 12 and closing the next switching roller 11. The route is set to the left inclined passage 12b. During this time, the spring 18 switches the urging direction of the body plate 16 beyond the dead point. Switching roller 11 is on the right slope passage
When pushed up along 12a, the control lever 23 on the left side is pushed by this and rotates counterclockwise as shown in FIG. 7B, and the latch lever on the left side is shown as shown in FIG. 7C. As the 27 rotates counterclockwise, as shown in FIG. 7D, the closing arm 30 on the left side causes the movable contactor 34 to fall, and the fixed contactor 38 on the B power source side and the fixed contactor 29 on the load side 29. And B are connected to supply B power to the load. However, as shown in FIG. 7C, the roller 27a of the latch lever 27 is rotated until the left latch lever 27 has finished rotating counterclockwise, that is, until the B power source side is completely turned on in FIG. 7D. Presses the left cam surface 28b of the latch plate 28 to prevent its counterclockwise swing, so that the roller 26a of the right latch lever 26 is held on the right cam surface 28a of the latch plate 28. Therefore, in FIG. 7D, the A power source side is maintained in the closed state. Therefore, as shown in FIG. 7D, a state in which both the A and B power supplies are simultaneously supplied to the load is created.

Excitation of the solenoid 6 is instantaneous, and at the same time when the operation lever 3 is deenergized, the operation lever 3 is rotated and returned counterclockwise by a spring.
The switching roller 11 returns to the center position of the guide hole 11
The state shown in FIG. As shown in FIG. 7C, when the left latch lever 27 has finished rotating counterclockwise, the roller 27a is separated from the cam surface 28b and the latch plate 28 loses its support. It is pushed by the roller 26a and swings counterclockwise to the state shown in FIG. 8C. In this state, this time the roller 27a of the left latch lever 27 is
Since it rides on the cam surface 28a on the left side of 8 and is held in its raised position, even when the switching roller 11 returns to the central position of the guide hole 11, the ON state of the direct B power source side is maintained. During this time, the right latch lever 26 is rotated counterclockwise, the right movable contact 33 is erected and separated from the load side fixed contact, so that the A power source side is separated.

Switching from the B power source to the A power source is performed in the same manner as described above, and the moment when both the A and B power sources are connected to the load is created during this period. Therefore, when the power source is switched, the power supply to the important load is not interrupted for an instant.

(Effects of the Invention) As described above, according to the present invention, the operation lever 3 that swivels by manual or electric operation and can be restored instantly by the spring force, and the swiveling motion of the operation lever 3 has a substantially V-shaped shape. Of the guide hole 12 is movable up and down along the left and right inclined passages 12a and 12b, and the switching roller 11 located at the center of the guide hole 12 at the restoration position of the operation lever 3 and the switching roller 11 are alternately arranged. In order to move up and down along the left and right inclined passages 12a and 12b, the point plate 15 that alternately closes the left and right inclined passages 12a and 12b, and the switching roller 11 along the right or left inclined passages 12a and 12b of the guide hole 12. And the control levers 22 and 23, which are pushed respectively against the restoring springs and turn right or left around the operation shafts 20 and 21 and the tips alternately rise as they are moved upwards. Interlocking with the alternating rotation of the levers 22 and 23, the control levers 22 and 23 When the ends are in the upper position, the power source side fixed contactors 37, 38 of A or B are connected to the load side fixed contactors 39 respectively, and when the tips of the control levers 22, 23 are in the lower side, respectively, of A or B, respectively. The movable contacts 33 and 34 for separating the power supply side contacts 37 and 38 and the load side contact 39 are integrally rotated with the control levers 22 and 23 so that the tips are alternately moved up and down together with the control levers 22 and 23. In addition, while the pair of left and right latch levers 26 and 27, one end of which is fixed on the operation shafts 20 and 21, respectively, and the positions of the tip ends of these latch levers 26 and 27 are switched up and down,
In order to momentarily control the tips of both latch levers 26 and 27 to be in the raised position, a latch plate 28 pivotally attached to the left and right is provided between the pair of latch levers 26 and 27. This latch plate 28 has one latch lever that descends.
The one latch lever 26, 27 is pushed by the tips of the latch levers 26, 27 and tilts toward the other latch lever 27, 26 side, and contacts the tip of the one latch lever 26, 27 in the lowered position to maintain the tilt state. Until the tips of the levers 26, 27 reach the raised position, the overlapped power supply switching switch is configured by providing the cam surfaces 28a, 28b that abut on the other latch levers 27, 26 and hold the raised position. When switching between the two types of power supplies to be connected, it is possible to create an overlap state in which both power supplies are simultaneously connected to the load so that the load side does not experience a power failure even for an instant.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a plan view of the switch according to the embodiment with a partial cover removed, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. Fig. 1 III-III sectional view,
FIG. 4 is a right side view in FIG. 3, and FIG. 5 is FIG.
V sectional view and FIGS. 6 to 8 are explanatory views showing the operation process. 3 ... Operation lever, 11 ... Switching roller, 12 ... Guide hole,
12a, 12b …… Inclined passage, 15 …… Point plate, 20,21 …… Operation axis, 22,23 …… Control lever, 26,27 …… Latch lever,
28 …… Latch plate, 28a, 28b …… Cam surface, 33,34 …… Moveable contact, 37,38 …… Power source fixed contact, 39 …… Load side fixed contact.

Claims (1)

[Claims] 1. An operating lever which is manually or electrically operated to swivel and can be instantly restored by a spring force, and as the swiveling motion of the operating lever moves up and down along a left and right inclined passage of a substantially V-shaped guide hole. A control shaft which is freely movable and is located at the center of the guide hole at the restoration position of the operation lever, and the left and right inclined passages are alternately closed so that the control shaft is alternately moved up and down along the left and right inclined passages of the guide hole. When the point plate and the control shaft ascend along the right or left inclined passage of the guide hole, they are pushed by the respective ones and turn right or left around the operation shaft against the restoring spring to tip the tip. And the pair of left and right control levers that alternately rise, and the first or second power source side contactor and the load side respectively when the tip of the control lever is in the upper position in association with the alternating rotation of the control levers. With contacts A movable contact which is connected and opens the first or second power source side contactor and the load side contactor when the tip of the control lever is in a lower position; Together with the pair of left and right latch levers, one end of which is fixed on the operation shaft so that the tips are alternately raised and lowered, and the tips of both latch levers are momentarily moved to the raised position while the tip positions of these latch levers are switched up and down. In order to control as described in 1), a latch plate pivotally attached to the left and right is provided between the pair of latch levers, and the latch plate is pushed by the tip of one of the descending latch levers. Latches to the other latch lever side and contacts the tip of one latch lever in the lowered position to maintain the tilted state, and latches the other latch lever until the tip of the one latch lever reaches the raised position. Overlap-type power switching switch characterized by having a cam surface for holding the raised position in contact with the bar.