JPS6037575B2 - Switching control circuit in switching switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching switch that selects one of the contacts connected to two different power sources and intermittently connects it to a load side contact.

Conventionally, this type of switch has two
A load side movable contact 102 is installed between the two power supply side fixed contacts 101, 101 so as to swing and selectively contact either of the fixed contacts 101, 101, and the center OF
Is the distance between the F position and the left and right ON position layers short?
, 101 may occur.

In order to eliminate the above-mentioned drawbacks of the conventional switching switch, the present invention disposes a load side fixed contact 3 between two power supply side fixed contacts 1 and 2 as shown in FIG. 2, and a movable contact located below. 4
By causing the switch to move in a substantially V-shape as shown by the arrow, sufficient switching time and switching distance can be achieved to interrupt the arc in a narrow space.

To explain an example of the implementation of the present invention with reference to the drawings, as shown in FIG. They are spaced apart from each other, and a load side contact 3 is provided between these two power supply side contacts 1 and 2.

Below these three fixed contacts, as shown in FIGS. 4 and 5, an operating shaft 6 is freely rotatably provided through the main body 5, and one end 36 of this operating shaft 6 is connected to the main body 5. It protrudes from the side of the switch and can be manually rotated, and switching levers 7, 7 are fixed to both sides.

Both ends of a connecting punch 8 extending parallel to the operating shaft 6 are pivoted to the tip of the switching lever 7, and three contact punches 10 are protruded from the connecting hole 8 at intervals from each other. . Note that this embodiment is for a three-phase multi-flow exposure source. A movable point 4 having two contact parts 12, 12 on both sides passes through the tip of the contact village 10 so as to be perpendicular to the tip, and is constantly pressed in the tip direction by a pushing strip 14 and is tilted. , restoration is possible.

The arrangement relationship between the three fixed contacts and the movable contact 4 is such that, for example, when the movable contact 4 moves diagonally downward to the left from the position shown in FIG. 4, the first power supply side contact 1 opens first, and then the load side contact 3 open, and conversely, move the load side contact 3 slightly toward the movable contact so that when the movable contact 4 moves upward, it contacts the load side contact 3 first and then contacts the first power supply side contact 1. It is designed to be close to .

At one end of the connecting punch 8, as shown in FIG.
0, and the base end of the same body plate 15 is fixed with a screw 11 so as to operate integrally with this same body plate 15.
A sliding plate 16 is attached to the distal end of the plate and protrudes in a direction perpendicular to the direction of extension thereof.

This sliding village 16' is inserted into a substantially V-shaped guide hole 18 formed in the partition wall 17, and the same body plate 15 and the contact village 10 are formed into a substantially V-shape according to the shape of this guide hole 18. It is made to move. Here, it is understood that the same body plate 15 merely acts as a substitute for the bushing point 10', and that even if the cutting edge 16 is attached directly to the tip of the contact punch 10, it will still lead its operation. Above the guide hole 18 of the partition wall 17, a switching plate 19 is pivoted by an adjacent 201.
The upper protruding punch portion 23 is bent at right angles, passes through the through hole 24 of the partition wall 17, and is inserted into the innermost hole 26 of the rotating body 25.

This switching plate 19 moves within the guide hole 18 (sliding village 16
It is configured to contact the upper surface of the holder and rotate around a shaft 20. The rotating body 25 has a cam surface 27 on the lower side, is rotatably mounted coaxially with the switching plate 19 on the opposite surface of the partition wall 17, and has one end rotatably engaged with the partition wall 17 on the side thereof. The end of the helical spring 28 that has stopped and expands is rotatably locked.

Depending on the rotation angle of the rotating body 26, a rotational force in the opposite direction is applied to the rotating body 25 from the dead center. This rotating body 25 can rotate left and right independently of the switching plate 19 within the range of the outermost hole 26, and the switching plate 19
It is possible to rotate left and right within the range of 4, integrally with the rotating body 25 or independently. When the sliding punch 16 descends in the guide hole 18 and reaches the lowermost position in the center, the switching plate I9 disengages the tip 21 from the sliding punch 16, and the switching plate I9 is rotated integrally with the rotating body 25. It is rotated by the spring force of the spring 28, and the tip 21' protrudes into the guide hole 18, thereby closing the passage of the guide hole 18 on the side from which the sliding village 16 has descended, and opening the sliding village 16. In principle, the switching plate 19 and the rotating body 25 may be integrated. Color-coded markings 30, 30 are attached to the outer circumferential surface 29 of the rotating body 25, and these can be seen through a display window 32 provided in the outer box 31. Furthermore, when this switching switch is installed upside down, However, so that you can know the current connection status, this rotating body and the connecting lever 3
A rotary display body 34 of the same shape and size, which is connected by 3 and rotates in the same way, is provided on the back side, and similarly displays the connection status from another display window 35 of the outer box 31. A base end portion of a swing lever 38 is fixed to the other end 37 of the operating shaft 6 that operates switching, and the tip of a traction shaft 48 of a solenoid 39 attached to the main body 5 is attached to the middle portion of the swing lever 38. is attached to the flange 41 in the middle of the traction shaft 40.
The ends of the trigger strips 42, 42, which have one end locked to the main body, are locked and are always rotated in the opposite direction to the suction direction of the solenoid 39, counterclockwise in FIG. This applies a force in the direction of the upper fixed contact.

In the case of manual switching operation, as shown in FIG. 4, the operating lever 43 is iron-coupled to the protruding end 36 of the operating shaft 6 and rotated against the springing force of the triggering strip 42. In this case, the solenoid 39 is energized and the operating shaft 6 is similarly rotated. Note that it is also conceivable that the trigger strip 42 and the solenoid 39 be installed and operated in opposite directions. Next, to explain the operation, when the operating shaft 6 is manually or automatically rotated in the direction of the arrow a in FIG. 7 from the state shown in FIG. While the moving village 16 presses and rotates the left inclined portion of the guide hole 18 in the drawings, the switching plate 19 is rotated integrally with the rotating body 25 against the expanding force of the coiled spring 28. It descends as shown in Figure 10A, and when it reaches the center bent part 22 of the guide hole 18 at the lowermost end as shown in Figure 10A, the sliding village 16 and the tip 21 of the change plate 19 meet. The switching plate 19 is removed, and the switching plate 19 rotates slightly in the direction of the arrow b due to the spring force of the helical spring 28 together with the rotating body 25, and the tip 21 of the switching plate 19 rotates slightly in the direction of the arrow b.
closes the left passage of the guide hole 18 in the figure.

During this time, as shown in each of Figures 7 to 10,
The contact village 10 is lowered diagonally to the lower right in the figure together with the body plate 15, and the movable contact 4 is first opened from the first power supply side contact 1 as shown in FIG. As shown in Figure 10, the load side contact 3 is opened, and the neutral position shown in Figure 10, where it is not in contact with any of the contacts, is reached. The operations up to this point are performed by moving the swinging lever 38 in the direction of the arrow c in FIG. 3 and rotating the operating shaft 6 in the direction of the arrow a in FIG. Next, the operating axis 6
When the lever starts to rotate in the direction of the arrow d in FIG.
The same plate 15 is pushed up, and the sliding punch 16 is moved through the guide hole 18.
Since the left passage is closed by the tip 21 of the change plate 19, it is guided to the right and rises diagonally upward to the right. Then, the upper surface of the sliding punch 16 comes into contact with the cam surface 27 at the bottom of the rotating body 25 and pushes it up, and the rotating body 25 pushes it up against the spreading force of the helical spring 28 in the direction of the arrow e in FIG. When the helical spring 28 rotates while being compressed and exceeds the dead center x of the helical spring 28, the expanding force of the helical spring 28 is now applied to the It begins to work in the direction of rotating the rotating body 25 as indicated by the arrow e in Figure A, and stops when the sliding village 16 reaches the upper right end of the guide hole 18, as shown in Figure 13A. This joint punch 10 also rises obliquely above the stone together with the body plate 15, as shown in each of FIGS. 11 to 13.
As shown in FIG. 12, the movable contact 4 first contacts the load side contact 3 and then contacts the second power supply side contact 2 to complete the switching of the power source. Then, the power source is switched by repeating the same operation. Next, to explain the control circuit when using the solenoid 39 and the switching mechanism of the switch in this control circuit, as shown in FIG. The switching piece 45 is pivoted so that the edges 46 and 47 of the notch 44 substantially match the lower green of the guide hole 18.

The angle of the V-shaped notch of this switching piece 45 is slightly narrower than the angle of the guide hole 18, and therefore it is located slightly inward from the lower side of the guide hole 18, and has moved to the sloped portions on both sides of the guide hole 18. The switching piece 45 swings left and right when pressed by the fence 16. As the switching piece 45 swings to the right in the figure, the pressing plate 48 attached to the lower end of the switching piece 45 moves between the two microswitches Ms, , and Ms2 attached to the main body so as to face the side thereof.
A lotus contact protrusion 49 is pushed in. Switching plate 4
5 is caused by a pair of locking pieces 50, 51 protruding from the upper end.
is stopped by supporting a stopper 52 protruding from the partition wall 17, and the bracket stopper 52 and the locking pieces 50, 5
1, the switching pieces 45 are given rotational forces in opposite directions depending on their swing angles. As shown in FIG. 14, the microswitches Ms, , Ms2 are two lotus switches, with normally open contacts Ms, a, a, respectively.
It has Ms2a, normally closed contacts Ms, b, and Ms2b.

HI is a normally closed microswitch with contact date 1b,
A pushing plate 54 that is pressed by the tip of the swinging lever 38
When the contact protrusion 55 is pushed in, the circuit is opened. The push plate 54 has its base end connected to the support plate 56.
is inserted into the insertion hole 57, and the lower surface of the tip is pressed upward by the plate spring 58, so that the bent and erected press plate part 60 is pushed out by the press punch 59 provided at the tip of the swing lever 38. be.

The control circuit is configured as shown in FIG. 14, for example.
FIG. 3 shows the movable contact 4 in contact with the first power supply side contact 1 side,
From the state shown in Figure 4, the second switch for switching to the second power supply side contact 2
When switch D is pressed, its contacts d, d2 close, and at this time, the contact protrusions 49 of microswitches Ms, , Ms2 are pushed in as shown in Figure 3, and their normally open contacts Ms
, a, Ms2a are closed, so the normally open contacts Ms, a,
Ms2a, a current flows through the rectifier Si, excites the solenoid coil cc, attracts the traction shaft 40, rotates the operating shaft 6 through the swing lever 38, and moves the sliding village 16 to the position shown in FIG. to the center bend of the guide hole 18.

During this time, the pushing plate 5 was moved by turning the swing lever 38.
4, the contact protrusion 55 of the microswitch HI is pushed in, and the microswitch HI opens its contact point 1b,
Cut off the excitation current of solenoid coil cc. Then, the pulling koji 40 is pulled out by the spring force of the triggering strips 42, 42, and at the same time, the sliding koji 16 is guided by the tip 21 of the switching plate 19 and ascends the slope on the right side of the guide hole 18, and on the way up, The notch 44 of the switching piece 45 touches the green part 47 on the right side in the figure and presses it against the spring force of the pushing strip 53, causing it to swing to the right in the figure, so that the pressing plate 48 of the switching piece 45 Away from the interlocking contact projections 49 of the microswitches Ms, , Ms2,
The normally open contacts Ms, a, Ms2a open, and the normally closed contact Ms
, b, Ms2b closes. However, at this time, the contact point 1b of the microswitch HI is still open. And switching piece 4
5 is subjected to a rotational force in the right direction in the figure after the pushing strip 53 exceeds the most compressed position during its swinging. Thus, the lifting of the sliding punch 16 is completed, and the contact point of the micro switch HI is 1.
b is closed, and the movable contact 4 is closed as shown in the imaginary line in FIG.
It has been switched to contact 2 on the power supply side. In this state, when the first switch C for switching to the first power supply side contact 1 is pressed, the normally closed contacts Ms,
b, Ms2b, solenoid coil C via rectifier Sj
A current flows through C, which excites it and attracts the traction shaft 40,
The operating shaft 6 is rotated via the swing lever 38, and the sliding punch 16 located at the position of the imaginary line in FIG.
Lower it to 2.

During this period, the normally closed contact of the microswitch HI was set on day 1 as before.
b opens, the solenoid coil CC is deenergized, and the traction shaft 40
is restored and the Numado village 16 ascends the slope on the left side of the guide hole 18 in the figure. At this time, the sliding village 16 is connected to the notch 44 of the switching piece 45.
Touch the green part 46 on the left side of the microswitch M and press it to swing the switching piece 45 to the left in FIG.
s. , Ms2, the normally open contacts Ms,a, Ms2a are closed, and the normally closed contacts Ms,b, Ms2b are open. At this time, the bush point 1b of the microswitch HI is still open. The slider 16 further rises and completes its rise, the contact 1b of the microswitch HI closes, and the movable contact 4 switches to the first power supply side contact as shown by the solid line in FIG. If the on/off of each contact and the operation/non-operation of each element are shown in a flowchart in correspondence with the position of the sliding village 16 in the guide hole 18, the result will be as shown in FIG. 15, and as a result, the solenoid coil CC It is understood that it is the large line portion that is excited.

In short, the present invention separates the movable contact 4 from one of the power supply support points 1 and 2 by rotating the operation shaft 6 by the suction of the solenoid 39 and brings it to the neutral position, and then automatically restores the movable contact 4 to the other In the switching switch that is connected to the power supply side contacts 1 and 2, a normally open contact of the mitt switch HI is interposed between the power supply and one end of the solenoid coil CC to detect the vicinity of the end of rotation of the operating shaft 6 and open the circuit. between the normally closed contact point 1b and the power supply, the normally open contacts Ms, a of the mitt switch Ms, and the normally closed point Ms, b are interposed in parallel, and the normally open point of another IJ limit switch Ms2, which is interlocked with the limit switch Ms, which detects the process of restoring the operating shaft 6, is placed between the other end of the solenoid coil CC and the power supply. A normally open contact Ms2a and a normally open contact Ms2a are interposed in parallel, and the normally open contacts Ms, a, M of these two interlocking mitt switches Ms,, Ms2 are
Since the changeover switch is provided by leading out a pair of terminals on the s2a side and the normally closed contacts Ms, b, Ms2b side, it is possible to obtain a changeover switch with a simple structure and reliable operation.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional example, FIG. 2 is a front view showing an example of implementation of the present invention, FIG. 3 is a front view, and FIG. 4 is a rear view.
Fig. 5 is a plan view, Fig. 6 is a sectional view taken along line A-A in Fig. 5, Figs. It is a flowchart showing the operation. 1...First power supply side contact, 2...Second power supply side contact, 4...Movable contact, 6...Operation scale, 39...Solenoid , CC... Solenoid coil, Day 1... Limit switch, Day 1b
・・・・・・Normally open contact, Ms. ...Limit switch, Ms, a...Normally open contact, Ms, b...
・・Normally open contact, Ms2・・・Limit switch,
Ms2a... Regular support point, Ms2b...
Normally closed acid site. Younger brother' figure 2 figure 3 figure younger brother 4 figure 5 figure younger brother 6 figure younger brother A figure hair 8 figure younger brother 9 figure younger brother'0 figure younger brother

Claims (1)

[Claims] 1 Switching in which the movable contact is separated from one power supply contact by rotating the operating shaft by the suction of the solenoid, brought to the neutral position, and the movable contact is brought into contact with the other power supply contact by automatic restoring action. In the switch, a normally closed contact of a limit switch is interposed between the power source and one end of the solenoid coil, and the normally closed contact of a limit switch is opened when detecting the end of rotation of the operating shaft, and the normally closed contact of the limit switch is inserted between the normally closed contact and the power source. A normally open contact and a normally closed contact of a limit switch that detects the process of restoration and repeats sequential operation and non-operation are interposed in parallel, and a limit switch that detects the process of restoration of the operating shaft is placed between the other end of the solenoid coil and the power supply. A normally closed contact and a normally open contact of another limit switch interlocked with the limit switch to be detected are interposed in parallel, and a pair of terminals on the normally open contact side and the normally closed contact side of these two interlocking limit switches are led out for switching. A switching control circuit in a switching switch equipped with a switch.