JPS649804B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a switching switch that switches between two types of power sources, such as a regular power source and a standby power source.

Conventional switching switches are all suspension type, and those for three-phase circuits have three input terminals for connecting to two types of power sources, and three input terminals for connecting to the load side.
It has a total of 9 connection terminals around it, including 2 output terminals,
Electric wires were connected to each of these.

However, when maintaining, inspecting or replacing equipment, it is necessary to disconnect and reconnect many connection terminals and wires one by one, and it is necessary to install many switching switches in a compact multi-tiered manner inside the switchboard. The problem is that it cannot be done.

The present invention was made by focusing on the above-mentioned problems with conventional switching switches.The main body of the switch is mounted on a base so that it can be moved back and forth, and all the connection terminals are centrally located on the back of the switch. At the same time, a power supply terminal and a load side terminal are provided at the rear of the switch main body on the base so as to face and contact each of its connection terminals, and by moving the switch main body back and forth, it can be disconnected from the main circuit. It is an object of this invention to solve the above-mentioned problems by providing a configuration in which the devices are connected.

Embodiments of the invention will be described below with reference to the figures. The main body 1 of the switching switch is installed on a trolley 2, and a base 3
It can be moved back and forth on the top. On the back of main body 1,
For example, two sets of input terminals 4 and 5 are connected to two different types of power supply terminals 8 and 9, such as a regular power supply and a standby power supply, and an output terminal 6 is connected to the load side.
It is installed with the tip facing backwards. The main body 1 of this switching switch has a circuit configuration as shown in FIG.
Internal contacts C ₁ and C ₂ are switched manually or electrically to switch the power supply to the load side.

On the other hand, a support frame 7 erected on the base 3 at the rear of the main body 1 is provided with a regular power supply terminal 8 and a standby power supply terminal at positions facing the respective terminals 4, 5, and 6 of the main body 1 via insulators. Terminal 9 and load side terminal 10 are fixed. The terminals 8, 9, and 10 of these main circuits are of a clip type, and can be contacted by holding the terminals 4, 5, and 6, respectively, when the main body is retracted. That is, the main body 1 is disconnected from the main circuit in its pulled-out position, and is connected to the main circuit in its pushed-in position.

The opening and closing operations of contacts C ₁ and C ₂ in the main body 1 are performed by the fifth,
In conjunction with the forward and backward movement of the shafts 11 and 11', which is clearly shown in FIG. 6, the circuit is closed when the shafts 11 and 11' are in their forward positions, and is opened when they are in their backward positions. The shafts 11 and 11' are provided such that their front ends are spaced apart from the front frame 12 of the main body 1 by a predetermined distance. Both shafts 11, 11'
In between, two rectangular lock plates 13 and 13' are arranged so that their front sides are in contact with the front frame 12, overlapping each other, and are movable left and right along the front frame 12, respectively. This lock plate 13,1
The width of 3' is large enough to fit into the space between the front end of the shaft 11 or 11' in the retracted position and the front frame 12. The shafts 11 and 11' have triangular levers 14 and 14, respectively.
The rear top of 14' is pivotally connected by pins 15, 15'. The levers 14, 14' are horizontally rotatably supported on the main body 1 by vertical shafts 16, 16' at their inner tops, and their front tops are supported by bolts 17, 1, respectively.
7' is pivotally connected to one end of the one lock plate 13, 13'. One bolt 17 is connected to a guide slot 1 bored in the other end of the lock plate 13'.
The bolt 17' is rotatably supported in a receiving hole 13b drilled in one end of the lower lock plate 13, movably penetrating through the bolt 17'. 'b, and a guide elongated hole 1 is bored through this at the other end of the lower lock plate 13.
3a so as to be movable. Lock plate 1
3 and 13' have circular holes 13c and 1, respectively.
3'c is bored, and continuous to these circular holes 13c, 13'c, circular holes 13c, 13'c are formed at one end of each pivot joint part side.
Cuts 13d and 13'd narrower than 3'c are formed. And these circular holes 13c, 13'c
A vertical lock pin 18 is provided at the top of the body 1 so as to be movable up and down with respect to the main body 1 and biased downward by a spring 19. Lock pin 18
has a small diameter part 18a that is constricted on the way, and has a lever 18b extending horizontally at the top thereof, and can be inserted into the circular holes 13c, 13'c, and the small diameter part 18a has notches 13d, 13'. Can move freely within d. The lower end of the lock pin 18 that has passed through the circular holes 13c and 13'c is inserted into a pair of front and rear lock holes 20a and 20b of a guide plate 20 provided at the upper center of the base 3 so as to extend in the front and back direction. can also be fitted. Lock holes 20a, 20b of guide plate 20
are provided at intervals from each other in the front and back, and the front lock hole 20 is located at the disconnection position from the main circuit of the main body 1.
a (FIG. 7A) and, in the connection position, into the rear locking hole 20b (FIG. 7B).

Next, the effect will be explained. Place the main body 1 of the switch on the base 3 installed in the switchboard, and tighten the lock pin 18.
If you push it backwards while pushing it up against the spring 19, the terminals 4, 5, 6 on the back will automatically contact the corresponding terminals 8, 9, 10 on the rear, and the main circuit 1 and the main circuit will be connected. Connected. In this state, lock pin 1
8, its tip falls into the lock hole 20b at the rear of the guide plate 20, and the lock pin 18 is released again.
The main body 1 cannot be pulled out unless pushed up by hand (Fig. 7B). This completes the installation of main unit 1.
When performing maintenance inspection or equipment replacement, push up the lock pin 18 and pull out the main body 1 from the switchboard with its tip removed from the lock hole 20b.
This is done by cutting off the connection between the main circuit and the main body 1. Figure 7A
At the position where the connection between the main circuit and the main body 1 is broken, the lock pin 18 falls into the lock hole 20a in the front of the guide plate 20 again. Therefore, the lock pin 18 slides on the guide plate 20 at an intermediate position from the connection position to the disconnection position of the main body 1, as shown in FIGS. 7C and 11. When the switch body 1 is in the connected position shown in FIG. 7B or in the disconnected position shown in FIG. 7A, the lock pin 18 falls into the lock holes 20a, 20b, and the
As shown in Figure A, the small diameter portion 18a is connected to the lock plates 13 and 1.
When the contacts C ₁ and C ₂ of the switch main body 1 are both open at the height position 3', the shafts 11 and 11' are both in the retracted position as shown in FIG. When one contact point _C1 is closed from this state, one shaft 11 moves forward as shown in FIG. Guide slot 1
3′a to the right in FIG. 9B,
Along with this, the lower lock plate 13 moves to the right, and its right end part cuts into the front part of the other shaft 11'. Therefore, even if you try to close the other contact _C2 in this state, the shaft 1
1' is obstructed by the lock plate 13 and cannot move forward, so it is mechanically locked and cannot do this. At this time, it is also electrically locked. Conversely, if the other contact _C2 is closed, the first
As shown in Figure 0, the lock plate 13' moves to the left and cuts into the front of the shaft 11, blocking its forward movement. In this way, when either contact C ₁ or C ₂ is closed, the small diameter portion 18a of the lock pin 18 is connected to the lock plate 1, as shown in FIGS. 9 and 10.
3 or 13', and in this state, in order to pull out the main body 1, an attempt is made to pull out the tip of the lock pin 18 from the receiving hole 20a or 20b of the guide plate 20. too,
The large diameter part of the lock pin 18 has a notch of 13d or 1
Since it cannot pass through 3'd, it cannot be pulled out.
Therefore, when either of the contacts C ₁ or C ₂ is in the closed state, it is impossible to pull out the main body 1 and disconnect it from the main circuit.

Next, the main body 1 is in an intermediate position as shown in FIG.
If the lock pin 18 is resting on the top surface, the large diameter portion of the lock pin 18 is attached to the lock plate 13, as shown in FIG.
Since it is located at the height of 13', the lock plate 13,1
3' cannot move left or right. That is, when the main body 1 is in the intermediate position, the closing operation of the contacts C ₁ and C ₂ cannot be performed.

Among the above, the interlock effect can be summarized as follows. (1) Both contacts inside the switch body 1
When both C ₁ and C ₂ are in the open circuit state and both power supplies are in the "off" state, either one of the power supply side contacts C ₁ or C ₂ can be closed. (2) If either contact C ₁ or C ₂ is closed,
The other one is absolutely impossible to input. (3) The contacts C ₁ and C ₂ of the main body 1 can be opened and closed only when the switch body 1 is in the disconnection position and the connection position, and cannot be opened and closed in intermediate positions. (Four)
When either contact C ₁ or C ₂ is closed, the main body 1 cannot be moved from the disconnection position to the connection position, or conversely from the connection position to the disconnection position.

The above-described interlock action prevents the two types of power supplies from coming into contact with each other, and also prevents disconnection and connection with the main circuit due to movement of the main body 1 in the ON state, thereby avoiding the danger associated with this.

Note that the interlock mechanism for preventing two types of power sources from coming into contact with each other is not limited to a drawer-type switching switch, but can also be applied to a fixed type switch. That is, in this case, the structures of the lock pin 18, the circular holes 13c, 13'c, and the notches 13d, 13'd of the lock plates 13, 13' are unnecessary.

As described above, the present invention incorporates two sets of cut-off parts 21 and 22 in two rows on the left and right on the cart 2 that is movable back and forth, and connects the input terminal 4 of the left-row cut-off part 21 to the cut-off part row 21. Fix them vertically at the rear left side,
The input terminal 5 of the right-row interrupting section 22 is connected to the corresponding interrupting section row 22.
The input sides of the left and right blocking parts 21, 22 are connected in common to the output terminals 6, which are arranged and fixed vertically on the rear right side of the block, and the input sides of the left and right blocking parts 21, 22 are horizontally arranged and fixed in the upper rear part of the blocking parts 21, 22. On the left and right, power terminals 8 and 9 connected to different types of power sources are vertically arranged and fixed so as to face each input terminal 4 and 5, and a load side terminal 10 connected to a load is provided at the rear upper part away from the trolley 2. are horizontally arranged and fixed so as to face each output terminal 6, and each terminal 4, 5, 6, 8, 9, 10 is configured to be able to be brought into contact with and separated from it by moving the cart 2 back and forth. Since the drawer-type switching switch is constructed by interlocking the opening/closing operations of 21 and 22, the device can be made compact, and the main body of the switching switch can be connected and disconnected from the power supply extremely easily. As a result, maintenance and inspection of equipment, replacement of parts in the event of failure, etc. can be carried out safely and in a short time.

[Brief explanation of drawings]

Fig. 1 is a front view, Fig. 2 is a plan view, Fig. 3 is a side view, Fig. 4 is a circuit diagram, Fig. 5 is a sectional view of main parts, Fig. 6 is a perspective view of main parts, Fig. 7 8 is a schematic side view showing the relationship between the position of the main body and the state of the lock pin;
Figures 11 to 11 show the operation of the interlock mechanism, and A is a front view and B is a bottom view, respectively. 1...Body, 2...Dolly, 3...Base, 4,5
...Input terminal, 6...Output terminal, 7...Support frame,
8, 9...Power terminal, 10...Load side terminal.

Claims (1)

[Claims] 1. Two sets of cut-off parts are installed in two rows on the left and right on a cart that is movable back and forth, and the input terminals of the left-hand cut-off parts are arranged and fixed vertically at the rear left side of the row of cut-off parts,
The input terminals of the right-row interrupting section are vertically arranged and fixed at the rear right side of the interrupting section row, and the input sides of the left and right interrupting sections are commonly connected to the output terminals arranged and fixed horizontally above the rear part of the interrupting section, and the above-mentioned Power supply terminals connected to different types of power sources are vertically arranged and fixed opposite to the input terminals on the rear left and right sides away from the trolley, and load-side terminals connected to the load are fixed at the rear upper part away from the trolley. The terminals are arranged and fixed in a horizontal direction so as to face each output terminal, and the terminals are configured to be able to be connected to and separated from each other by moving the cart back and forth, and the opening and closing operations of the two sets of cut-off parts are interlocked. Drawer type switching switch.