JP3302903B2 - Wireless device for remote control of hoist type overhead crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates the hoist type overhead crane to radio equipment to remote control.

[0002]

2. Description of the Related Art A radio device for remotely operating a hoist type overhead traveling crane performs carrier sensing and uses the same frequency as one of the measures to prevent radio interference when a plurality of radio devices are used in the vicinity. The configuration is not used. In addition, in order to identify a specific receiver, an ID code is added to the transmission information and transmitted. The receiver compares it with its own ID code and receives information only when they match, preventing malfunction due to interference. are doing. Conventionally, the ID code used here needs to be set according to the usage status of the other remote control radio at the place where the crane is installed, so the transmitter and the receiver can be changed and they match each other. In some cases, the ID code is set in the transmitter, and in the other case, the ID is set to the same value by changing the receiver side.

[0003] Further, there is no particular rule for the operation of confirming the operation input after the ID code is changed.

[0004]

According to the above prior art, if both the transmitter and the receiver can be changed, the user or the installer must manage the ID codes of a plurality of radios. And it is complicated. Further, when the same type of remote control wireless device is used in another adjacent facility, the management may not be performed properly, which may cause a malfunction.

When the transmitter side is fixed and the receiver side is changed to match the ID code of the transmitter, the ID code becomes a code unique to the transmitter, so that it is not necessary to manage the transmitter itself. In the event that replacement is required due to failure, breakage, or the like, it is necessary to make a change on the receiver side to match the ID code of the replaced transmitter. In general, the receiver is installed on an overhead crane, and when changing, the receiver must climb on the crane, which is inefficient and very dangerous.

Conventionally, no special consideration has been given to the confirmation after the change of the ID code, and if the change operation is unaware of an error, the operation of the hoisting operation, the traverse operation, and the traveling operation is performed. A crane that is out of scope will malfunction and there is also a problem in terms of safety.

A first object of the present invention are easy to ID code setting work reliably and safely performed, yet provides a radio equipment for released hoist type overhead crane remote operation from complicated management of the ID code It is in.

A second object of the present invention, in addition to the first object, is to further provide an interlock for the operation input after changing the ID code, thereby avoiding a malfunction due to an incorrect ID code setting, thereby further improving safety. is to provide an improved hoist ceilings crane remote control radio equipment was sex.

[0009]

SUMMARY OF THE INVENTION The first object of the present invention is to provide a remote control system in which an available frequency channel is manually or automatically selected from a plurality of frequency channels and an ID code for identifying a specific receiver is added to a transmission signal. Regarding the technology for performing hoisting operation, traversing operation, and traveling operation of a hoist type overhead crane by a wireless device for operation, the ID code of the wireless device, the receiver side is fixed, and the transmitter side can be changed. Achieved by

A second object of the present invention is that, in addition to the first configuration, the transmitter of the wireless device capable of changing the ID code is used to confirm the change after changing the ID code. If you do not operate the operation input push button other than the operation of top operation, traversing operation, and traveling operation, you must perform hoisting operation, traversing operation,
The driving signal of the traveling operation is achieved by a configuration in which the driving signal is not transmitted even when the operation input push button is pressed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

First, FIG. 5 shows an external view of a hoist type overhead traveling crane equipped with a remote control wireless device according to the present invention.

The hoist 30 is a girder 3 of an overhead crane.
1 to perform hoisting, traversing, and running operations. The hoist control panel 20 has a built-in wireless receiver and a hoist controller, and is attached to the main body. Radio waves transmitted from the transmitter 10 are transmitted to a receiving antenna 21 attached to the hoist control panel 20.
And given to the radio receiving unit. The operator operates the hoist arbitrarily by remote control from the ground by pressing the operation push button of the transmitter 10.

FIG. 1 is a block diagram showing a functional configuration of a transmitter and a receiver of a remote control wireless device.

In FIG. 1A, reference numeral 1 denotes a transmitter, and FIG.
In (b), 2 indicates a receiver.

In the transmitter 1, 1a is a transmitting section for generating a transmission radio wave, 1b is a radio transmission section for transmitting a channel code, an ID code, and a control code on the radio wave according to the transmission format shown in FIG. 2, and 1c is a carrier sense. The use frequency selected by the transmission unit 1a and the radio wave transmission unit 1b
The frequency selector 1d stores the ID code of its own as a channel code, and the ID code memory 1d stores the ID code at the time of transmission to the radio wave transmitter 1b. A control code conversion section 1f provided to the radio wave transmission section 1b constitutes an ID code from an input value provided from the operation input section when changing the ID code, and an ID code setting section provided to the ID code storage section 1d.
Reference numeral 1g denotes an operation input detection unit that gives an input from an operation push button or a setting switch to the control code conversion unit 1e and the ID code setting unit 1f, and 1h denotes an antenna.

In the receiver 2, 2a is a tuning section for detecting a received radio wave, 2b is a radio wave receiving section that divides the received radio wave for each code and gives it to each section, and 2c is a channel code given from the radio wave receiving section 2b. Select the frequency and tune section 1
The frequency selection unit 2d to give a the ID code received from the radio wave receiving unit 2b and the ID code stored in the ID code storage unit 2f, and only when they match,
An ID code determination unit that outputs a control code reception permission to the control code processing unit 2e, and the ID code determination unit 2b
Only when there is a reception permission output from the
b, a control code processing unit for receiving a control code from the control signal output unit 2b as a hoist control signal to an operation signal external output unit 2g;
f is an ID code storage unit for storing its own ID code given to the ID code determination unit 2d, and 2g is an operation signal external output unit for outputting a hoist control signal from the control code processing unit 2e to the hoist control unit 2i. And 2h are antennas. In this receiver, the ID code of the consistent number unique to the device is stored in the ID code storage unit 2f at the stage of manufacturing the device, and cannot be changed thereafter.

Reference numeral 2i denotes a hoist control section for controlling the operation of the hoist based on a control signal from the operation signal external output section 2g.

FIG. 2 is a diagram showing a communication format of one frame of transmission data transmitted by the wireless device.

One frame includes a channel code, an ID code, and a control code, and is cyclically repeated.

FIG. 3 is a diagram showing a device configuration of a transmitter of the wireless device.

In FIG. 3A, reference numeral 3 denotes a transmitter when the operation input push button also serves as a numerical value input key. For example, the push-button key 3a is for inputting an instruction at a very low speed, and "fine" is displayed at the center of the key. The same applies to other push button keys, and the characters displayed in the center of the keys correspond to the operation of the hoist type overhead crane, and any operation can be performed by pressing the push button keys.

Numeral 3b denotes a numerical value assigned to the key for inputting a numerical value. Here, numerical values from 0 to 9 are sequentially assigned to the operation input push buttons.

3c is a push button switch for lighting operation, 3
d is an alarm operation push button switch.

In FIG. 3B, reference numeral 4 denotes an example of a transmitter in a case where a switch for inputting numerical values is installed independently of a push-button switch for operation input. In the example shown in the figure, six switches 4a capable of selecting a numerical value in a rotary manner are provided so that a six-digit numerical value can be input. 4b is a value corresponding to the number of digits of the input numerical value. Although only a numeric input switch is shown in the figure, an operation input push button key is arranged at another location as described in the case of the transmitter 3.

Next, a procedure for changing the ID code on the transmitter side will be described.

First, a description will be given of a case where the operation input push button is the transmitter 3 also serving as a numerical value input key.

First, the transmitter 3 is set to an ID code settable state by a combined operation of push-button keys or a changeover switch or the like. At this time, the transmitter 3 is in a power-on state, but transmission of all operation signals is prohibited. At this time, as the input of the push button switch, the driving operation input is invalidated, and the numerical value input is valid. When, for example, a six-digit “123456” is set as the ID code, the push buttons to which the respective numerical values are assigned are operated and input in order from the sixth digit. Note that "abcde
f "or other symbols may be input.

Inside the transmitter, the operation input detecting section 1g shown in the functional block diagram of FIG. 1 detects the above series of push button inputs, and inputs them to the ID code setting section 1f. Here, in order to perform the setting operation without fail, it is also possible to determine the ID code after repeating the input operation a plurality of times. That is, the first input is stored in a predetermined storage unit in advance, and the second and subsequent inputs are collated with the first input to determine the ID code if they match, and if not, the operator reviews the ID code. It is approaching.

Subsequently, by operating the "OFF" push button, the ID code setting section 1f causes the ID code set after input to be confirmed.
The code is sent to the ID code storage unit 1d and stored. There is no problem if this storage timing is performed when the ID code is determined without depending on the operation of the “OFF” push button. After the ID code is stored in the ID code storage unit 1d, the state exits from the ID code settable state, the operation input of the push button becomes valid, and the input of the numerical value becomes invalid.
Thus, the setting of the ID code in the transmitter 3 is completed.

Next, a description will be given of a case where the transmitter 4 in which the numeric input switch is provided independently of the operation input push button switch.

The transmitter 4, like the transmitter 3, does not necessarily require a special mode in which an ID code can be set. Also, the power need not be on. However, for safety, it is desirable that the operation be performed in a state where an ID code can be set to prohibit transmission of an operation signal or in a state where power is cut off.
As an input method, when "123456" is set as the ID code in the same manner as described above, the rotary numeric value selection switch corresponding to the sixth digit is set to "1", and similarly, the numeric value of the corresponding digit number is set. I do. After the setting is completed, when the power of the transmitter 4 is turned on, the operation input detecting unit 1g shown in FIG. 1 detects the state of the rotary numerical value selection switch of each digit, and inputs the state to the ID code setting unit 1f. Setting unit 1
f sends the ID code determined after input to the ID code storage unit 1d and stores it. Thus, the setting of the ID code in the transmitter 4 is completed.

FIG. 4 is a flowchart for defining the processing of the transmitter for securely confirming whether the ID code has been changed to the target ID code after the completion of the ID code setting change as described above. .

To explain the flow, normally, when there is no change in the setting of the ID code, the processing of A and B is repeatedly executed, and transmission of all operation signals is permitted. When the setting of the ID code is changed, the process branches at decision A, and all the operation signals are prohibited from being transmitted by process C. The prohibition of transmission of all operation signals is continued until the change operation is completed by the judgment C. When the ID code change operation is completed, an operation signal other than hoisting, traversing, and traveling (for example, the push button switch 3c for lighting operation and the push button switch 3d for alarm operation in the transmitter 3 in FIG. 3) is sent out by processing E. Allowed,
The operation is continued until the operation is confirmed by an operation input other than hoisting, traversing, and traveling. After confirming the operation by operation inputs other than hoisting, traversing, and running, the transmission of all operation signals is permitted by the process B, and the process returns to the normal process. As described above, after the ID code is changed, the operation of hoisting, traversing, and traveling cannot be performed unless the operation is confirmed by operation input (lighting, warning, etc.) other than hoisting, traversing, and traveling. When an ID code other than the above ID code is set, a malfunction of a crane which is not a target can be prevented.

[0035]

According to the present invention, it is possible to change the ID code setting on the transmitter side which is frequently replaced due to damage or the like. Therefore, when the transmitter is replaced, the receiver side can replace the existing receiver. The ID code can be used, and it is not necessary to change the ID code on the receiver side. Therefore, not only is the efficiency of the transmitter replacement work improved, but there is no need for dangerous work at a high place, and there is a great effect in terms of safety.

On the other hand, since the ID code on the receiver side is fixed at the time of manufacture of the equipment, a unique ID number of the equipment is fixed. Need not be set, and ID code management is not required.

By restricting the operation after changing the ID code, a malfunction due to an incorrect ID code setting is interlocked, and the safety is further improved.

[Brief description of the drawings]

FIG. 1 is a functional block diagram illustrating an embodiment of the wireless device.

FIG. 2 is a diagram illustrating a communication format of one frame of transmission data transmitted by the wireless device.

FIG. 3 is an external view of a transmitter of the wireless device.

FIG. 4 is a flowchart for confirming operation of the wireless device after changing an ID code.

FIG. 5 is an external view of a hoist showing an embodiment of the wireless device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transmitter, 1a ... Transmission part, 1b ... Electric wave transmission part, 1c ...
Frequency selection section, 1d ID code storage section, 1e control code conversion section, 1f ID code setting section, 1g operation input detection section, 1h antenna, 2 receiver, 2a tuning section,
2b: radio wave receiving section, 2c: frequency selecting section, 2d: ID code determining section, 2e: control code processing section, 2f: ID code storage section, 2g: operation signal external output section, 2h: antenna, 2i: hoist control section 3, a transmitter whose operation input push button doubles as a numerical input key; 3a: operation input push button switch (operation input); 3b: operation input push button switch (numeric input); 3c: lighting operation push button Switch, 3d ... push button switch for alarm operation,
4, a transmitter in which a switch for inputting numerical values is installed independently of the push button switch for operation input, 4a: a rotary numerical selection switch, 4b: a value corresponding to the number of digits of the input numerical value, 10 ... Wireless transmitter, 20 ... hoist control panel,
21: receiving antenna, 30: hoist, 31: crane girder.

Continuation of the front page (72) Inventor Setsuo Miyata 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Hitachi, Ltd. Electrical Appliances Division, Taga Headquarters (56) References JP-A-4-22292 (JP, A) JP-A-4-172896 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B66C 13/40

Claims (3)

(57) [Claims] 1. A hoist-type overhead crane remote control radio for manually or automatically selecting an available frequency channel from a plurality of frequency channels and adding an ID code for identifying a specific receiver to a transmission signal for transmission. In the apparatus, the ID code is fixed on the receiver side and the transmitter side can be changed, and the transmitter capable of changing the ID code can change the ID code.
Later, hoisting operation, traversing operation, traveling
Do not operate the operation input push buttons other than driving operation.
Operation signals for hoisting operation, traversing operation and traveling operation
A wireless device for remote control of a hoist type overhead crane, wherein the device is not transmitted even when a push button is pressed . 2. The transmitter according to claim 1, wherein the ID code can be changed by a push button switch to which a numerical value or a symbol such as an alphabet is assigned and which is used to perform an up / down operation input. A wireless device for remote operation of a hoist type overhead crane, wherein a combination of numerical values or symbols according to a code is input. 3. The transmitter according to claim 1, wherein the transmitter capable of changing the ID code includes a plurality of switch input sections dedicated to setting the ID code, and a numerical value or a symbol such as an alphabet corresponding to the ID code on the receiver side. A hoist-type overhead crane remote control wireless device, wherein a combination is input.