JPH0138532Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a sequence test device used in a closed switchboard housing drawer-type electrical equipment.

(Prior Art) FIG. 1 shows a conventional closed switchboard, which has a circuit breaker chamber 1 on its front side and a busbar chamber 2 on its rear side. The circuit breaker chamber 1 houses a circuit breaker 3 and a position switch 4, respectively. The sequence test device is a device that operates this position switch 4 arbitrarily.

In general, this type of sequence test configures the control circuit in the same state when the circuit breaker 3 has it in the test position as it has in the connected position,
The operation of the control circuit, circuit breaker 3, etc. is tested, and for this purpose, it is necessary to operate the position switch 4 when the circuit breaker 3 is in the test position. For this reason, conventionally, a sequence test device having the structure shown in FIG. 2 has been provided.

In this sequence test device, when the circuit breaker 3 comes to the connected position, the operation part 5 of the position switch 4 is pushed by the rear part of the circuit breaker 3, the link 6 is rotated, and the switch 7 is activated. ing. At this time, the wire 8 slides inside the arcuate hole 6a of the link 6 and stops. Further, at the time of return, the operating portion 5 is pushed back when the circuit breaker 3 is pulled out due to the elasticity of the return spring of the automatic return type switch 7.

In the above configuration, when performing a sequence test, the wire 8 is pulled, the link 6 is rotated, and the switch 7 is operated. The wire 8 is then fixed under tension to the fixed hardware 9.

To cancel the operation of the position switch 4, the fixed hardware 9 is returned to its original position and the wire 8 is pulled back to its original position by the automatic return force of the switch 7.

(Problems to be Solved by the Invention) The conventional sequence device described above has the following difficulties.

(1) When canceling the operation of the position switch 4, pulling back the wire 8 relies on the automatic return force of the switch 7, so the return spring of the switch 7 needs to be strong. If the spring is made stronger, it will become heavier when pulling the wire 8.

(2) Since the operation of the position switch 4 is manually released, there is a risk that the release may be forgotten.

(3) There is a risk of malfunction due to expansion or contraction of the wire 8.

(4) If rust occurs in the wire 8, a great deal of operating force will be required, and there is a risk that the switch 7 will not return automatically.

The present invention has been proposed in order to solve the conventional problems, and its purpose is to provide a sequence test device that is easy to operate and does not malfunction.

[Structure of the idea]

(Means and effects for solving the problem) The present invention provides a drawer-type closed power distribution board in which the power distribution board is housed in the circuit breaker chamber, and a position switch equipped with a rotary lever is provided at the rear of the power distribution board. An actuating member is provided on the lever so as to be able to slide freely by being biased to return by a spring of the position switch, a fixing member equipped with a switch is provided in the circuit breaker chamber on one side of the switchboard, and the fixing member is provided with a switch. A pair of guide pins are arranged in parallel, and each guide pin is slidably engaged with an L-shaped long hole and a long hole of the operation plate,
This operating plate is biased to return outward by a spring, and a tapered protrusion is formed at the tip of the operating plate to push the operating member, and a tapered protrusion is formed at the tip of the operating plate so as to push the operating member. An actuating protrusion is formed to actuate the switch, and by pulling the switchboard outward to the test position, the operation of the position switch is released, and the operation plate is moved against the spring into the position. By pushing the switch toward the switch side, the position switch is actuated. On the other hand, by pushing down the grip of the operation plate, the operation plate is temporarily locked, and the operation protrusion is used to operate the switch. This is to display a message to prevent erroneous operation.

(Example) Hereinafter, the present invention will be explained based on an example shown in FIGS. 3 to 5.

In FIG. 3, the reference numeral 10 is a position switch for sequence testing in a closed switchboard, and the operating member 1 of this position switch 10 is
1, when the circuit breaker 12 is inserted to the connection position,
It comes into contact with the rear part of the circuit breaker 12 and slides to the right in the figure to rotate the rotary lever 13 and operate the switch 14. Then, when the circuit breaker 12 is pulled out, the operating member 1
1 is pushed back to its original position by the elasticity of a return spring (not shown) of switch 14. That is, it is returned to the left side in the figure.

On the other hand, in the circuit breaker chamber 16 located near one side of the circuit breaker 12, as shown in FIGS. 3 to 5, a fixing member 15 is provided upright. , an operation plate 1 having a grip for operating the switch 14 from the front side of the circuit breaker chamber 16 when the circuit breaker 12 is in the drawn-out position;
7 is provided. Further, as shown in FIGS. 4 and 5, this operation plate 17 is formed into a long plate shape, and an L-shaped long hole 18 and a long hole 19 are respectively bored in the central part in the longitudinal direction. It is set up.
Further, at the tip of this operation plate 17, a circuit breaker 1 is provided.
A tapered protruding piece 20 located below 2 is formed. A pair of guide pins 21 and 22 protruding laterally from the fixing member 15 are respectively engaged with both the elongated holes 18 and 19, and the operation plate 17 is connected to the elongated holes 18 and 19 and the guide pin 21 , 22 as guides in the horizontal direction, actuating the switch 14, and pushing down its grip, the L-shaped elongated hole 1 is opened.
A guide pin 21 is engaged with the rising portion of 8. Therefore, the operation plate 17 is temporarily locked in that position.

On the other hand, in the middle of the operation panel 17, there is an operation protrusion that outputs an indication that the sequence test device is in operation as a signal circuit to the central control room or another operation panel, and operates a limit switch 23 to prevent erroneous operation. 24 is formed, and the limit switch 23 is fixed to the fixing member 15. A coil spring 25 is interposed between the fixed member 15 and the operating plate 17, and the operating plate 17 is urged to return outward by the elasticity of the coil spring 25. That is, the operation plate 17 is always urged toward the front side of the circuit breaker chamber 16.

Next, the operation of the present invention will be explained.

When operating the sequence test equipment,
First, the circuit breaker 12 is pulled out to the test position. Then, the position switch 10 is deactivated.

Next, the operation plate 17 is pushed toward the position switch 10. Then, the operating plate 17 slides using the guide pins 21 and 22 of the fixed member 15 as guides, presses the operating member 11 of the position switch 10, rotates the rotary lever 13, and operates the switch 14.

Next, push down the grip part of the operation panel 17 slightly downward. Then, the guide pin 21 is engaged with the rising portion of the L-shaped elongated hole 18, and the operation plate 17 is temporarily locked. At this time, the operating protrusion 24 of the operating panel 17 turns on the limit switch 23, as shown in FIG. A prevention display is made.

Next, when canceling the operation of the sequence device, the operation plate 17 is slightly pushed upward from the state shown in FIG. Then, the guide pin 21 is
When the operation plate 17 is removed from the rising portion of the elongated hole 18, the elasticity of the coil spring 25 returns the operation plate 17 to the state shown in FIG. 4, and the operation of the position switch 10 is released.

In addition, if you forget to release the sequence device, when the circuit breaker 12 is inserted to the connected position, the taper protrusion 20 at the tip of the operation plate 17 will cause the circuit breaker 1
The rear parts of 2 make contact and push this protruding piece 20 downward. This releases the lock on the operation panel 17, and prevents accidents caused by forgetting to release the lock.

[Effects of the Invention] As explained above, the present invention provides the following effects.

(1) Since no extra force is applied to the switch by the sequence test device, automatic return of the switch is facilitated, and failure of automatic return of the switch can be prevented.

(2) The actuation operation is completed by simply pushing down the operation plate, and the release operation is completed by simply raising the operation plate, making it extremely easy to handle.

(3) Even if you forget to release the circuit breaker, it will be automatically released by inserting the circuit breaker to the connected position.
Safety can be improved.

(4) Since the limit switch signal can be displayed externally to indicate that the test is in progress, it is possible to prevent erroneous operation.

(5) Since wires are not used like in the past,
Malfunctions caused by expansion and contraction of the wire can also be prevented.

[Brief explanation of drawings]

FIG. 1 is a partially broken side view showing a conventional closed switchboard, FIG. 2 is a perspective view showing the conventional example, FIG. 3 is a plan view showing an embodiment of the present invention, and FIG.
FIG. 3 is a front view, and FIG. 5 is a side view showing the operating state. 10... Position switch, 11... Operating member, 12... Circuit breaker, 13... Rotating lever, 14
... Switch, 16 ... Circuit breaker chamber, 17 ... Operation panel, 18 ... L-shaped slot, 19 ... Long hole, 20 ...
Projection piece, 21, 22... Guide pin, 23... Switch, 24... Operation projecting piece, 25... Coil spring.

Claims (1)

[Scope of utility model registration request] In a drawer-type closed switchboard in which the switchboard is housed in a circuit breaker chamber, a position switch equipped with a rotating lever is provided at the rear of the switchboard, and an actuating member is attached to the rotating lever so that the spring of the position switch returns the operating member. A fixing member equipped with a switch is provided in the circuit breaker chamber on one side of the switchboard, a pair of guide pins are arranged in parallel on the fixing member, and each guide pin is operated. A tapered projecting piece is provided at the tip of the operating plate, which is slidably engaged with the L-shaped elongated hole of the plate and is biased to return outward by a spring. A sequence test device characterized in that the actuating member is formed to push the operating member, and an actuating protrusion is formed in the middle of the operating plate to actuate the switch.