JPH10338430A - Short circuit device for safety switch of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply a short circuit device to all safety switches as well as to prevent omission of detachment of the short circuit device from the safety switch after use. SOLUTION: A short circuit device is composed of a double pole switch 2 provided with switch parts 2A, 2B capable of being interlocked with each other, clips 6, 7 for connecting the switch part 2A to a connecting terminal of a safety switch, a battery 3 connected to the switch part 2B, a luminous body 5, and a sounding body 4. When the double pole switch 2 is turned on after the connecting terminal of the safety switch is gripped by the clips 6, 7 in maintenance work of an elevator, a part between contacts of the safety switch is short-circuited through the switch part 2A, and simultaneously, a current is carried through the switch part 2B, the sounding body 4 is sounded, and the luminous body 5 is lighted on. Next, after maintenance work is performed, the double pole switch 2 is turned off, and the clips 6, 7 are detached from the connecting terminal of the safety switch. At this time, sounding of the sounding body 4 is stopped, and the luminous body 5 is lighted off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator safety switch short-circuit device for short-circuiting the contacts of a safety switch during maintenance work of an elevator.

[0002]

2. Description of the Related Art Generally, in an elevator, it is necessary to periodically check the operation of each part of the elevator in order to safely operate a car. In this operation check, it is not sufficient to check only the state of each part that operates during normal operation. It is also necessary to check the operation when the safety switch that operates only in an emergency is short-circuited.

Conventionally, a method has been used in which the safety switch is short-circuited by gripping the connection terminal of the safety switch with a connection clip at the time of elevator maintenance work. There is a problem of forgetting to remove from the connection terminal.

Therefore, as one means for solving such a conventional problem, as disclosed in Japanese Patent Application Laid-Open No. 7-277626, for example, a pair of clips connected to a connection terminal of an elevator safety switch is provided. Shorting devices have been proposed which have another clip connected to the negative power supply terminal of the safety switch.

In this conventional short-circuit device, the safety switch is short-circuited via a pair of clips, a buzzer sounds, and after a predetermined time, a timer operates to automatically release the short-circuit state of the safety switch. It has become.

[0006]

In the above-mentioned conventional short-circuit device for an elevator safety switch, the voltage of the power supply of the short-circuit device and the voltage of the power supply of the safety switch must be equal. There was a problem that only safety switches could be applied. In addition, since the three clips do not operate properly unless they are connected to predetermined connection terminals of the safety switch, there is a problem that a malfunction may occur if the clips are incorrectly connected.

The present invention has been made in view of such a situation in the prior art, and has as its object to be applicable to any safety switch of an elevator and to prevent forgetting to remove from the safety switch after use. It is an object of the present invention to provide a short circuit device for an elevator safety switch.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an elevator safety switch short-circuiting device for short-circuiting the contacts of safety switches provided in an elevator during elevator maintenance work. A two-pole switch having two operable switch units, a connection unit for connecting one of the switch units to a connection terminal of the safety switch, and a battery and an alarm connected to the other of the switch units. It has a configuration provided.

In the present invention constructed as described above, during maintenance work of the elevator, one of the switch parts and the connection terminal of the safety switch are connected via the connection body, and then two sets of switches are turned on by turning on the two-pole switch. When the units are simultaneously operated, the safety switch is short-circuited through one of the switch units, and power is supplied from the battery through the other of the switch units to activate the alarm. As a result, as long as the short-circuit device is not removed from the safety switch, the state in which the above-described notification body operates is continued, so that forgetting to remove the safety switch after use can be prevented. In addition, since the power supply of the short-circuit device is separate from the power supply of the safety switch, there is no problem that only a specific safety switch can be applied, that is,
It can be applied to any safety switch of the elevator.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a short circuit device for an elevator safety switch according to the present invention. FIG. 1 is an electric wiring diagram showing a short-circuit device for an elevator safety switch according to a first embodiment of the present invention, and FIG.
FIG. 3 is an electrical wiring diagram showing a state in which the safety switch is short-circuited by the short-circuit device of FIG.

The short-circuiting device 1 of the present embodiment shown in FIG. 1 has a two-pole switch 2 having two sets of switches 2A and 2B which can be simultaneously operated, and one of the switches 2A and the connection terminals 12A of FIG. 12B, for example, alligator clips 6, 7 and the other switch unit 2B
And a notification body, for example, a sounding body 4 such as a buzzer, and a light emitting body 5 such as an indicator lamp.

The electric circuit shown in FIG. 3 is provided with safety switch contacts 10 to 12 and a relay 13 which is energized when all of the contacts 10 to 12 are closed. The contacts 10, 11, and 12 are, for example, for a governor switch (not shown), an upper limit switch, and a lower limit switch, respectively.

In the first embodiment, the switch unit 2A of the two-pole switch 2 is used during an elevator maintenance operation, for example, when performing an operation test of a shock absorber in a hoistway (not shown).
And the connection terminals 12A and 12B for the lower limit switch via the clips 6 and 7, respectively, and then the two-pole switch 2 is turned on and the two sets of switch sections 2A and 2B are simultaneously operated to operate simultaneously. Terminal 12A
- terminal 2A of the clip 6 switch unit 2A ₁ - terminal 2A ₂
-Clip 7- The circuit of the lower limit switch terminal 12B is closed, the lower limit switch is short-circuited, and the car (not shown) can be lowered to the position of the shock absorber. At the same time, the terminal 3 of the battery 3-switch section 2B
Since the circuit of B ₁ -terminal 2B ₂ -sound generator 4 and light emitter 5 is closed, sound generator 4 sounds and light emitter 5 is turned on. After the operation test of the shock absorber in the hoistway is performed in this way, the two-pole switch 2 is turned off, and the clips 6 and 7 are removed. As a result, the sounding of the sounding body 4 is stopped and the light emitting body 5 is turned off.

In the first embodiment configured as described above,
As long as the short-circuit device 1 is not removed from the safety switch, the sounding body 4 and the light-emitting body 5 continue operating.
It is possible to prevent forgetting to remove from the safety switch after use.

In this embodiment, the battery 3 of the short-circuit device 1 is separate from a power source (not shown) of the safety switch.
There is no problem that only a specific safety switch can be applied, and the invention can be applied to any elevator safety switch.

In this embodiment, the switch unit 2A and the connection terminal 12 of the safety switch are connected via the clips 6 and 7.
A, 12B, so that clip 6,
7 is detachable, and connection with the safety switch is easy. Further, when the two-pole switch 2 is turned on, the light is emitted from the battery 3 and the light emitting body 5 and the sounding body 4 are operated, so that the operator can easily confirm the short-circuit state of the safety switch.

FIG. 4 is a view for explaining a short-circuit device for an elevator safety switch according to a second embodiment of the present invention.
In FIG. 4, the same components as those shown in FIGS. 1 to 3 are denoted by the same reference numerals.

The short-circuit device 14 of the present embodiment shown in FIG.
Compared with those shown in FIGS. 1 to 3 described above, the difference is mainly that a pair of sockets 15 and 16 are provided as connecting bodies for connecting the switch unit 2A and the connection terminals 12A and 12B in FIG. The other configuration is basically the same.

One socket 15 is connected to the switch section 2A, and the other socket 16 is connected in advance to the connection terminals 12A and 12B of the lower limit switch.

In the second embodiment, the switch unit 2A of the two-pole switch 2 is used during an elevator maintenance operation, for example, when performing an operation test of a shock absorber in a hoistway (not shown).
Is connected to connection terminals 12A and 12B for the lower limit switch via sockets 15 and 16, respectively. Subsequent operations are the same as in the first embodiment.

In the second embodiment configured as described above,
The same effects as in the first embodiment can be obtained.

FIG. 5 is a view for explaining a short-circuit device for an elevator safety switch according to a third embodiment of the present invention.
In FIG. 5, the same components as those shown in FIGS. 1 to 4 described above are denoted by the same reference numerals.

The printed circuit board 20 shown in FIG.
1, a resistor 22, a capacitor 23, and a safety switch,
For example, sockets 24 and 25 for connecting the contact 12 of the lower limit switch to the printed circuit board 20 are provided.

The short-circuit device 26 of the present embodiment shown in FIG. 5 is different from that shown in FIGS.
Is provided with a pair of sockets 27 and 28 as a connecting body for connecting the switch unit 2A of the lower limit switch and the contact 12 of the lower limit switch.
0 is mainly different, and other configurations are basically the same.

Also in the third embodiment, when performing an operation test of a shock absorber in a hoistway (not shown) during maintenance work of an elevator, first, the short-circuit device 1 side is connected to the socket 28 of the printed circuit board 2 side. Socket 27 is inserted. Subsequent operations are the same as in the first embodiment.

In the third embodiment configured as described above,
The same effects as in the first embodiment can be obtained.

[0027]

As described above, according to the first aspect of the present invention, as long as the short-circuit device is not removed from the safety switch, the state in which the notifying body operates is maintained. It is possible to prevent forgetting to remove from the safety switch. Further, since the power supply of the short-circuit device is separate from the power supply of the safety switch, there is no problem that only a specific safety switch can be applied, that is, it can be applied to any safety switch of the elevator.

According to the invention of claim 2 of the present invention, one of the switch portions and the connection terminal of the safety switch can be connected via at least one of the socket and the clip, and the socket and the clip are detachable. Therefore, connection with the safety switch is easy.

According to the third aspect of the present invention, when two sets of switches are simultaneously operated by turning on a two-pole switch, at least one of the light-emitting body and the sounding body is activated by supplying electricity from the battery. Therefore, the operator can easily confirm the short-circuit state of the safety switch.

[Brief description of the drawings]

FIG. 1 is an electrical wiring diagram showing a short-circuit device for an elevator safety switch according to a first embodiment of the present invention.

FIG. 2 is a plan view of the short-circuit device of FIG.

FIG. 3 is an electric wiring diagram showing a state in which a safety switch is short-circuited by the short-circuit device of FIG. 1;

FIG. 4 is a diagram illustrating a short-circuit device for an elevator safety switch according to a second embodiment of the present invention.

FIG. 5 is a diagram illustrating a short circuit device for an elevator safety switch according to a third embodiment of the present invention.

[Description of Signs] 1 Short-circuit device 2A, 2B switch section 2 2-pole switch 3 Battery 4 Sound-emitting body (notification body) 5 Light-emitting body (notification body) 6, 7 Clip 10-12 Contact 12A, 12B Connection terminal 14 Short-circuiting device 15 , 16 sockets 26 Short-circuit device 27, 28 sockets

Claims (3)

[Claims] 1. An elevator safety switch short-circuiting device for short-circuiting between contacts of a safety switch provided in an elevator during maintenance work of the elevator, comprising: a two-pole switch having two sets of switch units that can be simultaneously and interlocked; A short circuit device for an elevator safety switch, comprising: a connection body for connecting one of the switch units to a connection terminal of the safety switch; and a battery and an alarm connected to the other of the switch units. 2. The elevator according to claim 1, wherein the connection body includes at least one of a socket that can be inserted into a connection terminal of the safety switch and a clip that can grip the connection terminal of the safety switch. Safety switch short circuit device. 3. The information body according to claim 1, wherein the notifying body includes at least one of a light emitting body that emits light and a sounding body that emits sound when the two-pole switch is turned on. Safety switch short circuit device for elevators.