JPS60143540A - Power source changing switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power switching switch for selectively connecting two different sources, such as a regular power source and an emergency power source, to a load side.

Conventional electromagnetic type? The eight-source switching switch instantly and simultaneously performs the opening operation of one contact and the closing operation of the other contact. For this reason, the non-voltage time of the contacts during the switching operation is extremely short, and there is a possibility that the two electrical contacts may come into contact with each other.

The present invention was made by focusing on the above-mentioned problems of conventional switching switches, and the contacts are switched by the instantaneous movement of the movable core of the solenoid. By mechanically delaying the closing operation of the contacts and completely opening one TA contact, the other power supply contact is closed. 1III15j It is an object of the present invention to provide a power supply switching switch which has a long non-voltage time at a contact during switching, can effectively prevent contact between two power supplies, and has a simple and compact structure.

Embodiments of the invention will be described below with reference to the figures. First and second power opening/closing parts 2-3 are mounted on the base 1, and an operating mechanism 4 for opening/closing them is provided above them. Each opening/closing part 2.3 moves back and forth horizontally in the figure with input-side fixed contacts 5 and output-side fixed contacts 6, which are arranged in two rows facing each other in the case, and separates each input. and a movable frame 8 having a plurality of movable contacts 7 that can short-circuit and open the output side fixed contacts 5 and 6.

The movable frame 8 has a pair of contact protrusions 9, 9 which stand vertically A' upward with a space between them. An operating shaft 10 is vertically supported in the case and passes through the case. The operating shaft 10 has a cam 11 located within the case between both contact protrusions 9,9 of the movable contact frame 8. The cam 11 has a substantially triangular cross section, and rotates forward and backward within a range of approximately 90 degrees while slidingly contacting both contact protrusions 9, 9. According to the rotation, the movable frame 8 is moved left and right in the third factor, and rotates. Bringing the movable contact 7 into contact with the fixed contact 5.6 at one end of the
At the other end, the movable contact 7 is separated from the fixed contacts 5, 6, and its cam surface presses both contact protrusions 9.9 to prevent movement of the movable frame 8. It should be noted that when one of the first and second power supply opening/closing parts 2 and 3 is in a short-circuited state between the fixed contacts 5 and 6, the other is in an open state between the fixed contacts 5 and 6. The output side fixed contacts 6.6 of both power supply opening/closing parts 2.3-3 are electrically connected to each other and connected to the load side. Further, the input side fixed contact 5 of the 1' Pt source switching section 2 is connected to a first power source, which is a regular power source, for example, and the input side fixed contact 5 of the second power source switching section 3 is
For example, the second f, which is an emergency power source, is connected to the power source.

The operating mechanism 4 includes movable members 34 and 35 consisting of a pair of links 12 and 13 and movable arms 14 and 15 corresponding to each power supply opening/closing section 2 and 3, and a closing switch provided between both movable arms 14 and 15. Spring 16 and both movable arms 14°15
and latch plates 17 that alternately engage with each other.

The pair of movable arms 14 and 15 each have one end,
The solenoid yoke 31 is further fixed on a support plate 18 fixed to the base 1, and is horizontally rotatably connected by pivots 32 and 33, and a closing spring 16 is interposed between the other ends. The closing spring 16 is made up of two springs with a large diameter and a small diameter that are fitted into each other so as to be able to move in and out in the axial direction! 1
It is placed within 9 and 20. The large-diameter spring tube 19 is pivotally attached to the other end of one movable arm 14 by a pivot 21, and the small-diameter 5-1 spring tube 20 is attached to the other end of the other movable arm 15 by a pivot 21.
It is pivoted by 2. Movable iron cores 23 and 24, which protrude to face each other, are fixed to the inside of the intermediate portion of each movable arm 14, 15. These movable iron cores 2
3 and 24 can be attracted into a pair of solenoids 25 and 26 fixed on the support plate 18, respectively, when energized.

One end of the links 12 and 13 is fixed to the operating shafts 10 and 10 of the respective electric chest opening/closing parts 2 and 3 that protrude upward from the case, and the other end extends downward through the notch holes 18 a + 18 b of the support plate 18 . It is pivotally attached to the pivots 21 and 22 that extend out.

Therefore, the operating shaft 10 is rotatable in accordance with the swinging of the movable arms 14 and 15.

The latch plate 17 is centrally attached to the support plate 18 by a shaft 36 and is swingable. The latch plate 17 has engagement recesses 27 and 28 on both sides that can be selectively engaged with pivots 21 and 22 at the tips of the movable arms 14 and 15 when tilting. The latch plate 17 is tilted to either one of the pivots 21,
22 is hooked into the engagement recesses 27 and 28 to restrain it, but the other pivot 22 and 21 moves inward together with the movable arms 14 and 15 of the other and into the engagement recesses 28 and 27. When it reaches the center, it rotates and pivots 21, 22.
release.

The limit switch 29 +'ao is pressed by one side of the latch plate 17 to close its contacts when the latch plate 17 is tilted, and opens and closes the contacts selectively depending on the direction in which the latch plate 17 is tilted. These limit switches 29, 3
0 contacts are provided in the excitation circuits of the solenoids 25 and 26, respectively, and are connected to the latch plate 17 or the limit switches 29 and 3.
When it is released from the hinge lever of 0, it circuits and interrupts the magnetic current.

Next, the operation of this switching itr closure will be explained based on FIGS. 4 to 6. In FIG. 4, the first power source opening/closing section 2 connected to the regular power source is closed, while the second armpit opening/closing section 3 connected to the emergency power source is open, so that the regular power source is supplied to the load side. The pivot 21 at the tip of the movable arm 14 contacts the side surface near one end of the latch plate 17 to tilt it, and pushes the hinge lever of the limit switch 29 to close it.
Furthermore, one recess 28 is engaged with the pivot shaft 22.

In the state shown in FIG. 4, when the solenoid 25 is excited to switch the power supply, the movable iron core 23 is attracted as shown in FIG. 5, and one movable arm 14 rotates about the pivot 32 in the direction of the arrow. The movable arm 14 is 19. , □2,20 IA□SIT41S 3,1 Shut off the power. However, in the state shown in FIG. 5, the recess 28 of the latch plate 17 is still engaged with the pivot shaft 22, so the other movable arm 15 cannot rotate.Therefore, one movable arm 14 compresses the closing spring 16 and releases it. Rotates independently while accumulating energy. Therefore, in this state, the second power switch 8B3 does not operate yet.

As shown in FIG. 6, when one movable arm 14 rotates further and the pivot 21 at its tip reaches the position of one recess 27 of the latch plate 17, the latch plate 17 loses its support.
Rotating under pressure on the pivot 22, its recess 28 releases the movable arm 15. The movable arm 15 is rotated by the stored spring force of the closing spring 16, and the movable arm 15 is rotated by the spring force of the closing spring 16.
The operation shaft 10 of the power supply opening/closing section 3 is rotated, and the movable frame 8 is moved by the cam 11.

Then, as shown in FIG. 7, the contact point of the second yellow source switching section 3 is closed, and the emergency 4 gap is connected to the load ill.

At this time, the latch 17 is separated from the limit switch 29, the solenoid 25 is demagnetized, and the other limit switch is contacted and closed to form an excitation circuit for the solenoid 26. That is, after the contact connected to one X1 source is opened, the contact connected to the other '4 source is closed after a predetermined delay time, and both contacts are opened except for the power switching operation. A relatively long-term R4 pressure-free state is ensured,
Conflict between the two terms can be avoided. Fixed W in contact with each other: An electromagnetic repulsion force acts between the tentacles 5 and 6 and the movable contact 7, but the cam surface of the cam 11 touches both contact protrusions 9 and 9 of the movable frame 8.
Since it is in contact with ljM, the movable frame 8 cannot be easily pivoted.
There is no risk of M. And now JIG is latch plate 17
The recess 27 and the pivot 21 engage, and the movable arm 14 is restrained. Switching from emergency power to regular power is done in the opposite way.

9- As explained above, the present invention provides a power supply switching switch that selectively connects two different power supplies to the load side, in which the solenoids 25 and 26 are linked to the operation of the movable iron cores 23 and 24. While alternately opening the contacts of one of the '1 generation sources, the springs 16 for the mutual closing operation are stored, and the elastic force of the stored springs 16 is used to alternately intercrop the other frozen ground. A pair of possible contacts 2: J' 33
, 34, and either one of them is +1111 ? until the spring 16 has a predetermined elastic force. The rS members 34 and 35 are alternately engaged to temporarily restrain them, and between the contact points of the other movable member 34 and 33 [in the middle of operation, in conjunction with this, the other movable member 11
Since the structure includes a latch member 17 that releases the members 35 and 34 and allows the contact closing operation thereof,
After securely opening the contact connected to one of the '1' sources, close the contact connected to the other chamber gap, and during this time, ensure a relatively long no 'rHt pressure loss at both contacts, and prevent cross-contamination of the sub power supply. It is possible to provide a simple and compact T.1 source incense switch that can effectively prevent the above problems.

[Brief explanation of the drawing]

70- Figure 1 is a plan view of the switching switch, Figure 2 is a partially cutaway front view, Figure 3 is a side view, and Figures 4 to 7 show the first sequence of operations of the switching switch. (A) is a schematic plan view of the 42g source opening/closing part, (B) is a movable member, and (C) is a schematic plan view of the 42g source opening/closing part. 2...1st electrical heel opening/closing part, 3...2nd '4' opening/closing part, 16...spring, 17...latch plate (latch member), 24...possible 〆(〃Iron core, 25.26...
...Solenoid, 34.35...Movable part moon. -/l- JP-A-Sho GO-143540 (6) Ugly 19 n Dimensions 99 ~ ~ ■ni

Claims (3)

[Claims] (1) Selectively connect two different power supplies to the load side
g In the switching switch, in conjunction with the operation of the movable iron core of the solenoid, the contacts of one of the power sources are alternately opened and closed, and the springs for mutual closing operation are stored, and the stored springs are activated. A pair of movable members that are alternately operated by force to close the contact of the other Sa, and a pair of movable members that alternately engage with one of the movable members until the spring has a predetermined elastic force. It is characterized by comprising a latch member that temporarily restrains one of the movable members and releases one of the movable members in conjunction with the liquid point opening N operation of the other movable member to allow the contact closing operation of the other movable member. Power switching switch. (2) The movable member includes a pair of swingable opposing levers each coupled to a movable iron core of the solenoid, and a rotating shaft having one end pivotally connected to each of the levers and having a tapered shaft that supports each contact point. the latch member includes a swingable latch plate whose center is pivoted between the pair of levers, and recesses are provided near both ends of the latch plate. wherein one end of the lever contacts the tip of one of the levers in the contact closed state, and a recess near the inclined end engages with the tip of the other lever in the contact open state;
and when one of the levers reaches a recess near the one end during a contact closing operation, it rotates and disengages from the other lever. ) The S source switching switch described in item ). (3) A patent claim in which two limit switches are provided in the vicinity of both ends of the latch plate, which swings almost simultaneously with the completion of the switching operation of the contact, for respectively cutting off power to the solenoids in conjunction with the swinging of the latch plate. The power switching switch described in item (2) of the scope.