JPH10167680A - Electric hoist - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To be able to operate safely by operating either a wireless device or a pendant device, and to quickly switch to a pendant device when the battery of the wireless device runs out or fails, greatly improving the usability. To improve. In an electric hoist equipped with a wireless device or a wired pendant device, a first connecting unit for connecting a receiver of the wireless device and the control device to a hoist main body,
As in the case of the wired pendant device, a second connection unit for connecting the control device is provided independently of each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of an electric hoist, and particularly to an electric hoist operated by a wireless or wired pendant device.

[0002]

2. Description of the Related Art A conventional electric hoist is operated by a wired pendant device 3 operated via a cable or by receiving an operation command transmitted from a transmitter 4 at hand by a receiver 6 as operating means. Only one of the operations on the wireless device is performed.

FIG. 4 shows a control configuration of a conventional electric hoist.

[0004] When an operation is performed by a wireless device,
The receiver 6 receives an operation instruction from the transmitter 4, and an operation command signal is input to the microprocessing unit MPU 10 via the connection unit 9 built in the control panel 2. MP
U10 outputs an operation command signal to the hoist motor control circuit 11 and the traverse motor control circuit 12 according to the content of the operation command signal. The hoist motor control circuit 11 and the traverse motor control circuit 12 drive or stop the hoist motor 1 and the traverse motor 5 in accordance with an operation command signal from the MPU 10.

[0005] The operation of the wired pendant device 3 is performed by operating a switch provided on the pendant device as is well known.

[0006]

In the conventional electric hoist, when the operation by the wireless device is performed, the battery of the transmitter 4 always runs out. It is a good idea to have a spare battery at hand and replace the battery. However, if the spare battery is not nearby, the electric hoist cannot be used, which is very troublesome.

[0007] To cope with this, or as a means for quickly backing up a failure of the wireless device, it is conceivable to temporarily enable operation using the wired pendant device 3 instead of the wireless device.

However, in this case, since the connection point for receiving the operation command signal is one of the connection parts 9 as shown in FIG. 3, the operation line from the receiver 6 is temporarily disconnected from the connection part 9. Alternatively, the wired pendant device 3 may be connected to the connection unit 9.
It is necessary to connect the operation line and drive, which is very troublesome.

It is also conceivable to connect the operation line from the receiver 6 and the operation line from the wired pendant device 3 to the connection unit 9 in advance, but the operation by the wireless device and the wired pendant device 3 are performed simultaneously. Considering the case, the operation is very dangerous.

As means for avoiding this danger, it is necessary to provide an interlock function between the operation line of the receiver 6 and the operation line of the wired pendant device 3. As an interlocking function, as shown in FIG. 3, a changeover switch 8 and a relay 7 are externally mounted, and the operation lines of the wireless device and the wired pendant device 3 are switched by the contacts 7a and 7b of the relay 7, as shown in FIG. It is of a configuration.

More specifically, when the changeover switch 8 is turned "ON", the contact 7a of the relay 7 is turned "O".
N "on the other hand, by turning off the contact 7b,
It is possible to connect the operation line of the wired pendant device 3 to the connection unit 9 to enable the operation by this, and to disable the operation by the wireless device.

When the changeover switch 8 is "OFF", the contact 7a of the relay 7 is "OFF" and the contact 7b is "O".
N ", the operation line from the receiver 6 is connected to the connection unit 9, the wireless device is enabled, and the wired pendant device is disabled, so that mutual interlock can be achieved.

In such an electric hoist, it is necessary that the connection unit 9 from the operating device be configured to be able to share the operation line connection by the wireless device and the operation line connection by the wired pendant device 3. is there.

In such a solution, as described above, when temporarily switching from the wireless device to the wired pendant device 3, the connection of the operation line from the receiver 6 to the connection unit 9 is temporarily disconnected. After that, it is necessary to connect the operation line of the wired pendant device 3 to the connection unit 9 and to operate the pendant device 3.

Similarly, when restoring from the wired pendant device 3 to the wireless device, it is necessary to perform the reverse of the above operation, and there is a problem in workability and responsiveness as a backup for the operation device. .

Further, in the case of regular use in a production line where the responsiveness of backup to operation recovery when an operating device fails or the like is urgently required, a wireless connection is made to the connection section 9 which shares the connection of the operation line. Both the device and the wired pendant device 3 need to be added to the outside, and an interlock circuit for operation of the wireless device and the wired pendant device 3 and a selection circuit for selecting an operation need to be added to the outside, respectively. This is a factor that causes an increase and is a problem.

When the customer connects both the operation line of the wireless device and the operation line of the wired pendant device 3 to the connection section 9, if the interlock circuit and the selection circuit are used without being added, simultaneous operation by different operators is performed. There is a problem that the manufacturer of the electric hoist cannot prevent the danger of the operation due to the operation.

Focusing on the above, the present invention enables safe operation by using either a radio device or a pendant device, and allows the radio device to be quickly switched to the pendant device even when the battery runs out or fails. The purpose is to significantly improve the performance.

[0019]

In order to achieve the above object, the present invention provides a hoisting machine main body, a hoisting motor provided on the hoisting machine main body for lifting and lowering a load, and a hoisting motor. An electric hoist comprising: a wireless device or a wired pendant device for giving an ascending / descending command to the motor for use, and a control device for controlling the hoisting motor by a command from the wireless device or the wired pendant device. The main body is configured to have a first connection unit that connects the receiver of the wireless device and the control device, and a second connection unit that connects the control device similarly to the wired pendant device. Things.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS.

FIG. 1 is a control circuit according to an embodiment of the present invention, and FIG. 2 is an external view of an electric hoist.

In the figure, H denotes a main body of the hoisting machine, 2 denotes a control panel provided on the main body H of the hoisting machine, and operation lines from the receivers 6 and 6 are provided inside the control panel 2. A connection unit 15 for connection, a connection unit 16 for connecting an operation line of the wired pendant device 3, the receiver 6, and the wired pendant device 3.
, A microprocessing unit MPU 18 for controlling the entire electric hoist, a hoist motor control circuit for controlling the hoist motor 1, and a traversing motor 5
Is mounted in a connected state as shown in the figure.

FIG. 2 shows the overall configuration of the entire electric hoist.
A control panel 2 incorporating a transmitter 4, a wire pendant device 3, and a receiver 6, a hoisting motor 1 for moving loads vertically, and a traversing motor 5 for moving loads horizontally.
It is composed of

The radio signal emitted by the transmitter 4 is received by the receiver 6, and this signal is input to the selector 17 via the connection unit 15.

An operation instruction signal from the wired pendant device 3 is input to the selector 17 via the connection unit 16.

The changeover switch 21 is a changeover switch for instructing the MPU 18 to select either the wireless operation by the receiver 4 or the operation by the wired pendant device 3.

When the switch 21 is in the "OFF" state,
The PU 18 selects an operation signal from the wireless receiver 6,
Recognize driving by wireless operation. When the changeover switch 21 is in the “ON” state, the MPU 18 selects an operation signal from the wired pendant device 3 and recognizes operation by the wired pendant device 3.

In this case, the MPU 18 is provided with the changeover switch 2
The selector 17 outputs a select designation signal to the selector 17 in accordance with the instruction 1 to control the selector 17.

The MPU 18 receives the operation signal switched by the selector 17 and recognizes the contents of the operation instruction.

For example, when the changeover switch 21 is set to the “OFF” state, the MPU 18 determines that the operation is a wireless operation. At this time, the MPU 18 enables the selector 17 to accept the input of the operation line by the receiver 6 and invalidates the input of the operation line by the wired pendant device.

The MPU 18 receives the signal from the receiver 6 from the selector 17.
, And the operation signal from the wired pendant device 3 is not input.

The operation in the case where the east operation command is transmitted by the transmitter 4 in the hoist and traverse under the above conditions and the west operation command in the lowering and traverse by the wired pendant device 3 at the same time will be described as an example.

The MPU 18 receives the hoisting operation command from the receiver 6 and the east operation command in the horizontal direction to the selector 17 in accordance with the setting of the changeover switch 21. The MPU 18 outputs a hoisting operation command signal to the hoist motor control circuit 19 in accordance with a hoisting operation command signal.

Similarly, the MPU 18 outputs an east operation command signal to the traverse motor control circuit 20 in accordance with the east operation command signal.

The hoisting motor 1 comprises a hoisting motor control circuit 1
The motor 9 is operated in the hoisting direction by the output from 9 to hoist the load.

Similarly, the traversing motor travels in the east direction by the output from the traversing motor control circuit 20 and moves the load in the east direction.

The wind-down instruction and the west operation instruction by the wired pendant device 3 are input to the selector 17 but not to the MPU 18 so that the operation instruction is invalidated and malfunction is prevented.

According to the embodiment of the present invention, there are the following various effects.

First, an operation input from the receiver of the wireless device and an operation input from the wired pendant device are provided independently of each other, and a control circuit is provided with a function for enabling selection between the two, and further provided from the outside. In this configuration, the selection information of the operating device is taken into the control circuit by the changeover switch, so that the responsiveness and workability when switching and exchanging between the wireless device and the wired pendant device can be greatly improved. effective. Also, when a wired pendant device is prepared or connected for backup in the event of battery exhaustion or failure of the wireless device, it is necessary for the user himself to configure an interlock circuit. Since an interlock function is provided therein, it is not necessary for a user to add an interlock circuit by himself / herself, so that the usability is improved and the economy is also advantageous.

Further, if the user does not add the interlock circuit, there is a danger in operation. However, in the present invention, the selection function is provided in the control circuit in advance. Even if a changeover switch cannot be attached, the pendant device is automatically disabled with priority given to the wireless device, so that the above-mentioned danger factors are eliminated beforehand, and safety can be improved. effective.

[0041]

As described above, according to the present invention, the operation can be safely performed by using either the radio device or the pendant device, and the pendant device can be quickly switched to when the battery of the radio device runs out or fails. , The usability can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a control circuit diagram of an electric hoist showing an embodiment of the present invention.

FIG. 2 is an external view of an apparatus to which the present invention is applied.

FIG. 3 is a control circuit diagram of a conventional electric hoist.

FIG. 4 is an external view of a conventional electric hoist.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hoisting motor, 2 ... Control panel, 3 ... Wired pendant device, 4 ... Transmitter, 5 ... Traversing motor, 6 ... Receiver, 7 ...
Relay, 8 ... changeover switch, 9, 15, 16 ... connection part,
11: hoist motor control circuit, 12: traverse motor control circuit, 17: selector, 18: MPU, 19: hoist motor control circuit, 20: traverse motor control circuit, 21: switch.

Claims (4)

[Claims] 1. A hoisting machine main body, a hoisting motor provided on the hoisting machine main body for raising and lowering a load, a wireless device or a wired pendant device for giving an elevating command to the hoisting motor. In an electric hoist having a control device for controlling a hoist motor according to a command from the wireless device or the wired pendant device, a receiver of the wireless device and the control device are connected to the hoist main body. An electric hoist comprising: a first connecting portion for connecting the control device; and a second connecting portion for connecting the control device as well as the wired pendant device. 2. A hoisting machine main body, a hoisting motor provided for lifting and lowering luggage in the hoisting machine main body, a traverse motor provided on the hoisting machine main body, and the hoisting motor. And a control device that controls the hoisting motor and the traversing motor according to commands from these wireless devices or the wired pendant device. In the electric hoist provided, a first connection unit that connects a receiver of a wireless device and the control device to the hoist main body, and a second connection unit that connects the control device like a wired pendant device. An electric hoist having independent connections. 3. The electric hoist according to claim 1, wherein one of the wireless device and the wired pendant device is effectively used.
An electric hoist having a switching function for invalidating the other. 4. The electric hoist according to claim 1, wherein the electric hoist has an interlock function between the wireless device and the wired pendant device.