JP2000233889A - Wireless operating device for lifting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent another lifting device from being operated by mistake by providing a plurality of confirmation switches to every lifting device, and making the lifting devices operable, only when the confirmation switches and the operating power source actuating key of a control transmission part are simultaneously pressed in the right conformation state. SOLUTION: A confirmation switch part 1 is set near an operating position by an operator on a wall surface. A confirmation switch 1a is connected to the power source driven switch of a radio transmission part 4, which is opened and closed by receiving radio waves according to opening and closing of a power source actuating key 2a as a AND circuit. At operation, the operating power source actuating key 2a of a lifting device 4 to be operated is pressed, and the confirmation switch 1a of the confirmation switch part 1 is pressed at the same time. According to this structure, the lifting device 4 will operate, only when the confirmation switch 1a of the confirmation switch part 1 of the lifting device 4 to be operated is operated and pressed by use of a right remote control switch 2. Accordingly, the wrong use of the remote control switch 2 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless operating device for a lifting device such as a plurality of cranes or lifts used in an automobile maintenance shop.

[0002]

2. Description of the Related Art In automobile maintenance factories, a plurality of cranes or lifts that can be remotely operated wirelessly by so-called remote control switches are frequently used.

[0003]

For example, when a lift is operated by a plurality of remote controls at a garage, if the lift on which the car is mounted is suddenly activated by moving the remote control switch and descends, There was a problem that an accident related to human life was caused or the remote control switch was pushed down when working while the remote control switch was kept in the pocket of the work clothes and the switch of the remote control switch was pressed, thereby causing the lift to malfunction. .

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to surely prevent operation of another lifting device such as a lift by mistake, and to provide a safe operation device of the lifting device.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a plurality of remotely operable lifting devices having a wireless receiver for receiving a wireless operation signal from a portable operation transmitter. A switch unit is provided for each lifting device, and when the confirmation switch of the confirmation switch unit and the operation power operation key of the operation transmission unit are simultaneously pressed, if another operation transmission unit is erroneously used, the lifting device operates. The lifting device is provided with a check circuit that enables the lifting device to be turned on and remotely operated when a corresponding operation transmitting unit is used.

[0006]

FIG. 1 shows a first embodiment of the present invention.
And FIG.

In FIG. 1, 1 is a confirmation switch unit, 2 is a portable operation transmitting unit, a so-called remote control switch, 3 is a radio receiving unit, 4 is a lifting device, and these confirmation switch unit 1, remote control switch 2 and radio reception unit are shown. The part 3 is provided in each lifting device 4.

The confirmation switch unit 1 is suspended from a wall, floor, or ceiling of an automobile garage or the like, and is installed in the vicinity of the operating position of the operator. A confirmation display means 6 for lighting or sound message is provided.

The remote control switch 2 is a wireless remote control transmitting unit using radio waves or infrared rays.
There are a plurality of keys necessary for the operation including the power supply operation key 2a, and an automatic power-off function for stopping transmission at a set time after the operation is completed.

Further, the wireless receiving section 3 is a receiving section for receiving a transmission signal from the remote control switch 2,
It is provided on the wall surface or the device main body that can be seen by the operator.

The lifting device 4 is a remotely controllable crane or vehicle lift.

FIG. 2 is a circuit diagram of the check circuit 10 provided in the radio receiving unit 3 according to the first embodiment of the present invention.

The confirmation switch 1a is constituted by an a contact which is a push button switch. The confirmation switch 1a is constituted by an electromagnetic contact 5a and an electromagnetic coil 5b as a self-holding circuit 5, and further comprises a first electromagnetic auxiliary contact 6a. A confirmation display means 6 is constituted by a lamp 6b and a voice message section 6c, and a power supply passive switch of a wireless reception section 3 which receives and opens wirelessly in response to opening and closing of the confirmation switch 1a and the power supply operation key 2a. 2a 'are connected in series, that is, as an AND circuit.

Further, the first electromagnetic auxiliary contact 6a and the second auxiliary contact 4a are opened and closed in conjunction with the electromagnetic contact 5a, and the second auxiliary contact 4a is closed to operate the operation power supply circuit 4b of the corresponding device 4. It is configured as follows.

Next, a method of using the first embodiment of the present invention will be described.

First, the remote control switch 2 of the lifting device 4 to be operated is held in one hand, and the operation power supply operation key 2a
At the same time, the confirmation switch 1a of the confirmation switch unit 1 is pressed with the finger of the other hand.

At this time, if the remote control switch 2
Is not corresponding to the lifting device 4,
Remote control switch 2 that is compatible with the radio receiver 3
, The power supply passive switch 2a 'of the wireless receiving unit 3 is kept open without being closed, so that even if the confirmation switch 1a is pressed, the confirmation switch 1a is pressed.
The lamp 6b of the confirmation display means 6 does not light up, the message does not flow from the voice message section 6c, and the operation power supply circuit 4b of the apparatus 4 remains in the inactive state.

When the correct remote control switch 2 corresponding to the device 4 is used, the power receiving key 2
a, the power supply passive switch 2a 'is closed and the connection confirmation switch 1a is also closed by the AND circuit, so that a current flows through the electromagnetic coil 5b and the electromagnetic contact 5
a is closed and self-holding even if the confirmation switch 1a returns,
When the first electromagnetic auxiliary contact 6a is also closed, the lamp 6b lights up,
A operable message is output from the voice message section 6c, and the second electromagnetic auxiliary contact 4a is closed to correct the device 4.
The operation power supply circuit 4b is operated, and the device 4 becomes operable.

Further, when the confirmation switch 1a is not pressed even if the correct remote control switch 2 is used, the lifting device 4 does not operate because the AND circuit between the confirmation switch 1a and the power supply passive switch 2a 'is not connected. Therefore, even if the correct remote control switch 2 is occasionally pressed, the lifting device 4 does not operate and the operation is safe.

From the above, since the lifting device 4 is operated only when the confirmation switch 1a of the confirmation switch unit 1 of the lifting device 4 to be operated using the correct remote control switch 2 is pressed with an intention to operate. Misuse of the remote control switch 2 can be prevented.

Since the check circuit 10 has a simple circuit configuration, it can be easily connected not only to a new one but also to an existing lifting device 4.

Next, a second embodiment of the present invention will be described with reference to FIG.

In the second embodiment, the receiving side has an auto power off function.

That is, as shown in FIG. 3, the self-holding circuit 5 shown in FIG.
At the point (3), the timer 7 is inserted into the electromagnetic coil 5b, and the self-holding is cut off after a predetermined time.

A method of using the second embodiment will be described.

Even if the wrong remote control switch 2 is put in the pocket of the work clothes and the operation key or the like is pressed, the lifting device 4 does not operate at all according to the first embodiment and is safe. If the operation key is pressed occasionally during the operation while the lifting device 4 is in the operable state in the switch section 2, malfunction may occur.

Therefore, the second electromagnetic auxiliary contact 4a is turned off by the timer 7 in accordance with a different required operation time in each lifting device 4.

For example, if the required lifting time of the lifting device 4 is 8 minutes, the predetermined time of the timer 7 in FIG. 3 is set to 10 minutes. First, if lifting is performed, lifting cannot be performed, adjustment is performed, and then lifting is performed again. During the adjustment work, when the predetermined time of the timer 7 elapses 10 minutes, the operation of the timer 7 opens the b-contact 7a to release the self-holding of the self-holding circuit 5 and to release the second electromagnetic auxiliary contact 4a. Since the operation power supply circuit 4b of the lifting device 4 is cut off by the opening operation, the operation can be performed with confidence.

When the lifting operation is to be performed again after the completion of the adjusting operation, the power supply operation key 2a of the remote control switch 2 and the confirmation switch 1a of the confirmation switch section 1 are simultaneously pressed to make the lifting device 4 operable.

The remote control switch 2 being adjusted in this way
Erroneous operation can be prevented even if is pressed by mistake.

[0031]

As described above, according to the present invention, the confirmation switch section is added to the plurality of remotely controllable lifting devices, and the power supply operation key and the confirmation switch section of the operation transmitting section are simultaneously pressed to securely operate the apparatus to be activated. It has the effect of being safe to operate and to prevent accidentally activating other devices.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory diagram of a first embodiment of the present invention.

FIG. 2 is a circuit diagram of a main part thereof.

FIG. 3 is a circuit diagram of a main part according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Confirmation switch part 1a Confirmation switch 2 Operation transmission part 2a Power supply operation key 3 Wireless receiving part 4 Lifting device

Claims (4)

[Claims] In a plurality of remotely controllable lifting devices having a wireless receiving unit for receiving a wireless operation signal from a portable operation transmitting unit, a plurality of confirmation switch units are provided for each lifting device. When the confirmation switch and the operation power activation key of the operation transmission unit are simultaneously pressed,
If another operation transmission unit is used by mistake, the lifting device does not operate, and if a correct operation transmission unit is used, the lifting device is turned on and a check circuit is provided which enables remote operation. And the lifting device of the wireless operation device. 2. The wireless operating device for a lifting device according to claim 1, wherein the confirmation switch unit is provided with a confirmation display unit using light or sound. 3. The check circuit according to claim 1, further comprising: a power supply passive switch of a wireless receiving unit that opens and closes in response to the operation power supply operation key, the confirmation switch connected in series to the power supply passive switch, and a self-holding circuit thereof. A wireless operating device for a lifting device according to claim 1 or claim 2. 4. The wireless operating device of a lifting device according to claim 3, wherein the check circuit includes a timer for turning off the self-holding circuit after a predetermined time or turning off the power of the lifting device. .