JPH08133681A - Crane condition display device - Google Patents

Abstract

PURPOSE: To eliminate an abnormality or the like at an early time, and to improve the rate of operation by changing the display content so as to displace the more practical content with a touch of an operator on the required area in the case where the abnormal condition or a condition, which needs an alarm, is generated. CONSTITUTION: Whether a device, which is provided with a motor for winding, hoisting and turning a boom, is normal or not is judged by a processing device 27 on the basis of the output signal of a thermal relay 43, a limiter switch 53, a temperature sensor 55 and a voltage sensor 56, which are respectively input to a relay terminal 29. Content of the signal transmitted to this processing device 27 is displayed in a display unit 65 with letters. This display device is provided with a memory 67 for storing the letter faceplate, which displays abnormal condition, alarm, or the operation limit condition, per each page number, and decides the page number to be read on the basis of the touch coordinate information generated by the contact with a touch panel 66, and reads out the corresponding letter faceplate so as to display it in the display unit 65.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for displaying an abnormal state of a crane, an alarm or a state of a control system (hook height, etc.) in an electric jib crane using an electric motor for turning, boom undulation and hoisting.

[0002]

2. Description of the Related Art A conventional crane has a display panel installed in a driver's cab for displaying a numerical value indicating a suspension load and a limit load or a ratio of the suspension load to the limit load, and an overload alarm (buzzer or buzzer). Lamp), a lamp for displaying the height of the hoisting speed, a lamp for indicating the occurrence of an abnormality in each device for turning, boom undulation, and hoisting, and an alarm device for issuing an alarm. .

[0003]

However, according to this conventional structure, when an indicator lamp for abnormal occurrence or an alarm device other than an overload is activated, the specific cause of the operation of the indicator lamp or alarm device is the operator. Since it is not possible to grasp it, it is necessary to look at the instruction manual or contact the manufacturer, and it takes a lot of time and effort for the operator to clear the abnormal state, and the crane is stopped during that time, so the operating rate of the crane There was a problem that it lowered.

In view of the above-mentioned problems, the present invention allows the operator to easily grasp the specific device and the contents causing the abnormality when the abnormality occurs, the alarm is activated, or the operation is restricted, and the abnormality is generated. It is an object of the present invention to provide a crane status display device that can be quickly released and can increase the operating rate.

[0005]

In order to achieve the above object, the present invention is directed to an electric jib crane having an electronic moment limiter, in which devices constituting hoisting, boom hoisting, and turning electric motors are normal. Relay signal indicating whether or not the signal, the signal of the moment limiter and the signal of the limit switch for operation limitation, and a programmable controller or a micro controller to which each of the signals is sent from the relay terminal via a transmission path. A processing unit comprising a computer,
A display device for displaying the content of the signal transmitted from the relay terminal to the processing device through the transmission path by characters, and a character screen for displaying an abnormal state, an alarm or a state of operation limitation on the display device for each page number. The memory to be stored, the touch panel provided in the display device, the touch coordinate information generated by the touch of the touch panel with a human hand or a contact, the information from the processing device, and the reading of the memory based on the display stage information And a page number determining means for determining a page number to be used. Further, in the present invention, preferably, the hook height detecting means is provided, and the page number determining means causes the display device to display the hook height in a normal time when no abnormality occurs.

[0006]

In the present invention, when an abnormality or a situation in which an alarm should be issued occurs, the device number and the content of the abnormality are sent to the processing device, and the processing device displays the characters on the display panel of the display unit by characters. Display the device that caused the abnormality. When the operator wants to know the device in which the abnormality has occurred and the details, the display content asks whether or not to advance the display content to a more detailed stage, and the content that the operator wants to know more detailed content is displayed. When the touched area of the touch panel is touched, the display content changes, and more specific content is displayed. The operator can always know the height of the hook by displaying the height of the hook when there is no abnormality or a situation in which an alarm should be issued.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system diagram showing an embodiment of a crane status display device according to the present invention, FIG. 2 (A) is a side view showing an example of a crane to which the display device of the present invention is applied, and FIG. )
Is a plan view of its main body, and the crane of this example shows a crane that is installed at the top of the building to hang the outer wall material etc. in order to construct the outer wall of the building where the frame is constructed. The crane may be used for other purposes. In FIGS. 2A and 2B, reference numeral 1 is a base fixed to a building, and a trolley that travels on a rail may be used instead of the base 1. Reference numeral 2 is a revolving device, 3 is a revolving structure, and a boom 4 is attached to the revolving structure 3 so as to be capable of undulating. Reference numeral 5 denotes a hoisting winch for hoisting the boom 4, and the hoisting rope 6 wound around the drum of the hoisting winch 5 is a sheave block 8 at the top of the A frame 7.
And a sheave block 9 connected by a pendant rope 10 to the top of the boom 4. The undulating winch 5 is driven by an electric motor 5a controlled by an inverter.

Reference numeral 12 is a hoisting rope having a hook 11 attached to the tip thereof, and the hoisting rope 12 is wound in multiple layers on a rope reel 13 to which torque is applied in the hoisting direction by an electric motor 13a, and is paid out from the rope reel 13. A is the A
After being hung on the sheave 14 at the top of the frame 7, one layer is wound around a pair of drums 15a of a hoisting winch 15 driven by an inverter-controlled electric motor 15b on the revolving structure 3, and is hung from the top sheave 16 of the boom 4. It Reference numeral 17 is an operator's cab, and 18 is an overwinding detection switch for detecting overwinding of the hoisting rope 12.

As shown in FIGS. 2A and 2B, a first control board 21 and a second control board 22 are mounted on the revolving structure 3. The first control panel 21 includes an electric motor 15b driving inverter 24 for the hoist winch 15 and an electric motor 13a driving inverter 25 for the rope reel 13 as shown in FIG. , Hoisting electromagnetic switch (including thermal relay) group 26 and these inverters 2
A relay terminal 2 provided for collectively transmitting relays indicating the states of the electromagnetic switches 4 and 25 to a processing device 27 (see FIG. 1) described later via a serial transmission circuit 28.
9 and 9 are arranged.

On the second control panel 22, as shown in FIG. 3B, an inverter 30 for driving the electric motor 5a of the undulating winch 5 and an inverter 31 for driving the electric motor of the turning device 2.
The moment limiter 32 and these inverters 30,
A relay terminal 34 for collectively transmitting the states of 31 and the moment limiter 32 to the processing device 27 via the serial transmission circuit 28 is arranged.

4 (A) and 4 (B) respectively show a cab 17
It is the top view and front view which show the equipment arrangement of the operation panel 36 installed inside. In FIGS. 4 (A) and 4 (B), 37 is a moment limiter display, and the display 37 displays the actual load and the limiting load side by side, or displays the ratio of the actual load to the limiting load numerically. It also displays the boom angle. 38 is an abnormality, an alarm, or the state of the control system (the height of the hook 11, the hoisting speed, etc.)
Is a display device for displaying. Reference numeral 39 is an anemometer attached outside the cab 17. Reference numeral 40 is an operation lever that is operated left and right to turn the revolving structure 3 left and right, and backward and forward to raise and lower the boom 4, and 41 is a front and rear operation that lowers a suspended load. , The operating lever for hoisting. 42 is an alarm buzzer. Reference numeral 27 denotes a processing device which is a programmable controller or a microcomputer housed in the operation panel 36.

FIG. 5 is a circuit diagram for explaining the connection relationship between the thermal relay 43, which constitutes a protection circuit for the electric motors of the turning device 2, the undulating winch 5, the rope reel 13, and the hoisting winch 15, and the processing device 27. Since they have basically the same configuration, only one circuit is shown. 44 is a relay, 44a is an electric motor M (this electric motor M
Refers to the turning electric motor of the turning device 2, the electric motor 5a of the undulating winch 5, the electric motor 13a of the rope reel 13 or the electric motor 15b of the hoisting winch 15) a-contact of a relay 44 inserted in a power line, 45, 46 is a push button switch for starting and stopping the electric motor M, and 44c is a contact for self-holding of the relay 44. 43b is a contact b of the thermal relay 43 inserted in series with the relay 44, 43a
Is an a contact of the thermal relay 43 connected to the relay terminals 29 and 34. In this circuit, the electric motor M
When an overcurrent flows during operation of the thermal relay 43, its b-contact 43b is opened and the relay 44 is demagnetized, whereby the contact 44a is opened and the electric motor M is stopped, and the a-contact 43a of the thermal relay 43 is opened. Is closed, and the relay number and the signal indicating the trip are displayed on the relay terminal 2.
It is transmitted from the processing unit 9 to the processing device 27 through the serial transmission circuit 28.

As shown in FIGS. 6A and 6B, a rotary encoder 48 is attached to the hoisting winch 15 in order to obtain the height of the hook 11, and the rotation detection signal of the rotary encoder 48 is processed. Cable 4 to device 27
Sent via 9. Signals from the hoisting and lowering operation levers 41 of the cab 17 are also sent to the processing device 27 via the cable 50, and the processing device 27 calculates the height of the hook 11 from these signals. To do. That is,
The rotary encoder 48 and the arithmetic means of the processing device 27 constitute the height detection means of the hook 11. The height of the hook thus detected is sent to the display device 38 via the serial transmission circuit 51.

As shown in FIG. 1, at the relay terminals 29 and 34, the signal from the thermal relay 43 and the limit switch 53 such as the overwinding detection switch 18, the swing limit switch, the undulation upper limit switch, and the swing lock detection switch are provided. Signal, the load limit signal 54 from the moment limiter 32, the signal from the temperature sensor 55 that detects the temperature inside the control boards 21, 22, and the power supply voltage, the main circuit of the inverter, the voltage of the control circuit, and other inverters. A voltage signal 56 or the like obtained by converting a current or the like into a voltage is input. In the processing device 27, the interface circuit 6 is controlled by the CPU 60.
1 and the signals representing the device number and contents transmitted from the relay terminals 29 and 34 through the serial transmission circuit 28 are taken and stored in the RAM 62, and the contents of the transmitted signals are also stored. The page number (described later) of the message corresponding to is read from the ROM (page number generating means) 63 recorded in association with the device number and contents, and transmitted from the interface circuit 64 to the display device 38 via the serial transmission circuit 51. Have a function.

On the other hand, as the display device 38, a display unit 65 provided as a display panel having a touch panel 66 is used. The touch panel 66 has a function of electrically extracting a touch area of the display screen by a hand or a contactor as coordinate information. Further, the display device 38 has an R
The RAM 67 has a page number, and a plurality of messages such as "abnormality occurrence", "thermal trip", and "inverter trip" are stored in the RAM 67 as a character screen for each page. Remembered more than 200 messages.

FIG. 7A is a block diagram showing the functions realized by the processing device 27 and the display device 38 shown in FIG.
FIG. 7B is a diagram showing the relationship of the display stages. Figure 7
As shown in (B), the display at the time of occurrence of abnormality is branched in a tree shape and exists from the first stage 75 to the fourth stage 78, and a display screen exists for each of them. As described with reference to 53 to 56 in FIG. 1, the alarm 79 includes a load alarm, a limit switch alarm, a temperature alarm, a voltage alarm, and the like. The display of the control state 80 includes the height of the hook 11 and the winding speed (high speed, medium speed, low speed), and the display of the control state indicates that an abnormality or a situation in which an alarm should be issued has occurred. Always display.

In FIG. 7A, page number determining means 71
Is realized by the CPU 68 of the display device 38. Of the information sent from the processing device 27 via the serial transmission circuit 51, when there is no alarm or abnormality occurrence, the RAM 67 A screen for displaying the hook height and the hoisting speed is selected and displayed on the display unit 65. When an abnormality occurs, the processing device 27 performs the first step 75.
The page number corresponding to the display contents of the fourth step 78 is transmitted to the display device 38. When it is necessary to issue an alarm, the page number corresponding to the content is transmitted. When an abnormality occurs, the page number determining means 71 displays the page number information 72 from the processing device 27 stored in the RAM 70, the touch coordinate information 73 from the touch panel 66, and the current display stage information 74, and displays the next. The page number of the display screen to be displayed is determined, and the data area to be highlighted is specified.

FIG. 8 is a flow chart showing the flow of processing when an abnormality occurs. Among the signals sent to the processing apparatus 27 by the processing apparatus 27 via the serial transmission circuit 28, the one that should issue an abnormality or issue an alarm. If there is, the contents are sent to the display device 38 via the serial transmission circuit 51 (S
1). When an abnormality occurs, the display device 38 displays (A) in FIG.
As shown in FIG. 7, the characters "abnormality occurrence" 82 in the first stage 75 of FIG. 7B are displayed, and the characters "Reference" and "Mute" are displayed (S2), and An alarm is issued by an alarm buzzer 42 (see FIG. 4 (A)). When the operator touches the portion of the character 84 of "silence", the alarm buzzer 42 stops ringing. When the character 83 of "reference" is touched (S3), the page number determining means 71 is selected.
Advances the display step by one, extracts the page number of the second step from the content of the page number information 72 sent from the processing device 27, and displays the second step of FIG. 9B ( S4). Figure 9
The display example of the second stage shown in (B) is an example in which the character 85 "Winding winch abnormality" is displayed and the abnormality is not the inverter abnormality but the thermal relay abnormality. The character portion 86 “” is displayed in reverse video to indicate that the thermal relay is abnormal. Here, the character 8 "confirm" included in the display screen of the second stage
When the operator touches the area 7 (S5), the page number determining means 71 selects the page number of the display in the first stage as the display content and causes the display section 65 to display "Abnormal occurrence". on the other hand,
If the operator touches the character 88 "reference" (S
6), the page number determining means 71 extracts the page number of the display of the third step of the page number information 72 from the display step information 74 and the touch coordinate information 73, and stores it in the page number of the RAM 67. The displayed character screen is displayed on the display unit 65 (S7). As shown in FIG. 9 (C), the display in the third stage is made by the character 90, and at the same time, the characters 91, 92 of “confirm” and “reference” are displayed. Here, if the operator touches the area of the character 91 of "confirmation" (S8), the display returns to the display of "abnormality occurrence" as described above, and if the area of the character 92 of "reference" is touched (S9), the page Number determining means 7
1 is from the display stage information 74 and the touch coordinate information 73,
The page number of the display screen at the fourth stage is extracted from the page number information 74, and the character screen stored in the page number of the RAM 67 is displayed on the display unit 65 (S10). Specifically, as shown in FIG. 9D, a character 93 that indicates which system of the thermal relay has tripped is displayed, and the number 94 of the relay that has tripped is highlighted.
At the same time, the character 95 "confirm" is displayed, and the operator touches the area of the character 95 "confirm" (S1).
Return to 1) and the display of "abnormality occurrence". The abnormality is cleared,
When the operator presses a reset button (not shown), the display content returns to the control state 80 display (hook height and hoisting speed display). As described above, by using the single display device 38, by providing the function of selecting and displaying the page number, when an abnormality occurs in the electric motor of each part of the crane, the device in which the abnormality occurs The number can be specifically notified to the operator.

In the case of an inverter error, the second step display is "Inverter trip! The hoisting (or swing, undulation, rope reel) inverter tripped. Check the monitor display on the inverter surface and check the nearest Please contact our service center. ", And at the same time, display" Confirm "and" Reference ". As the display of the third stage, for example, "UV1: main circuit undervoltage, UV
"2: Control voltage shortage, UV3: Inrush current suppression circuit electromagnetic contactor failure" (where UV1 to UV3 are abnormal code numbers), and if applicable, for example, the abnormal code number is highlighted. At the same time, display "Confirm" and "Next page", and touch "Confirm" to perform the same process as above.
If you touch "Next page", "OC: Overcurrent, O"
V: overvoltage, FU: blown fuse "(note that OC, O
(V and FU are abnormal code numbers) or the like, and if there is a corresponding one, the portion corresponding to the abnormal code number is displayed in reverse video, etc., so that the operator is notified by making a display different from other items. In this way, when there are many items that may cause an abnormality, the display screen is divided into multiple screens, and when the "next page" display is touched, the display page is advanced. . In this way, by displaying the abnormal code number and the contents, it is possible to know the abnormal state on the spot without looking at the instruction manual.

When an alarm is to be issued, "alarm! Hook overwind limit has tripped", "alarm! Undulation upper limit overwound limit has tripped", "alarm! Turn right (or left) limit , "Alert! Control panel I (or I
"I) Temperature error", "Alarm! Exceeded 90% (or 100%) of the rated load", "Alarm! The ground cutting speed is too fast. After winding once, slowly wind again.""Alert! Power supply voltage is too high (or too low)"
Etc. are displayed. At the same time, "confirmation" is displayed and the operator displays "confirmation" to return to the display of the hook height and hoisting speed. In this way, when the crane is stopped by detecting an abnormality in the operation limitation, the operator can simultaneously know the details of the limitation.

Further, except when an abnormality occurs or an alarm is issued, the display height of the hook and the hoisting speed are displayed on the display unit 65 of the display device 38 so that the display device 38 for issuing an alarm or an alarm is displayed. It can be used to inform the operator of the height of the hook and the hoisting speed at all times.

In the above embodiment, the transmission circuits 28, 5
Since the serial transmission circuit is used as 1, the circuit is simplified, but a parallel transmission circuit or a transmission circuit partially made into a serial circuit may be used. Further, the information sent from the processing device 27 to the display device 38 is not the page number information but may be other information such as the device number and contents as long as it is the information associated therewith.

[0023]

According to the first aspect of the present invention, when an abnormality occurs, the alarm is activated or the operation is limited, which device has issued the abnormality, the alarm, or the operation limitation, and the details thereof are displayed in characters. As a result, the operator can easily grasp the specific device and contents that are the cause, and it is possible to promptly take countermeasures such as abnormality cancellation, and the operating rate of the crane can be increased.

According to the second aspect, it is possible to inform the operator of the height of the hook at all times by using the display device which issues an alarm or an alarm. Especially, in a large-sized crane for a high-rise building, the display device is used. It can be useful for facilitating driving.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a crane status display device according to the present invention.

FIG. 2A is a side view showing an example of a crane to which the display device of the present invention is applied, and FIG. 2B is a plan view of its main body.

3 (A) and 3 (B) are respectively a plan view and a front view of an operation panel in the present embodiment.

4 (A) and (B) are respectively 2 in the present embodiment.
It is a front view which shows the internal equipment arrangement of two control panels.

FIG. 5 is a circuit diagram of a thermal relay in this embodiment.

FIG. 6A is a perspective view showing a mounting state of a rotary encoder in a hoisting winch, and FIG. 6B is a system diagram of height detecting means.

FIG. 7A is a block diagram showing a configuration around a page number determining unit, and FIG. 7B is a diagram explaining a relation of display contents.

FIG. 8 is a flowchart showing the flow of processing of this embodiment.

9A to 9D are diagrams showing, in stages, examples of display screens according to the present embodiment.

[Explanation of symbols]

5: undulating winch, 5a: electric motor, 13: rope reel, 13a: electric motor, 15: hoisting winch, 15a: electric motor, 21, 22: control panel, 24: hoisting winch drive motor inverter, 25: rope reel drive Inverter for electric motor, 26: hoisting electromagnetic contactor group, 27: processing device,
28, 51: Serial transmission circuit, 29, 34: Relay terminal, 30: Inverter for winch drive motor, 31: Inverter for swivel drive motor, 32: Moment limiter, 41, 42: Operation lever, 38: Display device, 43: thermal relay, 44: relay, 45:
Start push button switch, 46: Stop push button switch, 4
8: Rotary encoder

Claims (2)

[Claims] 1. In an electric jib crane having an electronic moment limiter, a relay signal indicating whether or not each device constituting a hoisting, boom hoisting, and turning electric motor is normal, and a momentary limiter of the moment limiter. A relay terminal for inputting a signal and a signal of a limit switch for operation limitation, a processing device consisting of a programmable controller or a microcomputer to which each signal is sent from the relay terminal via a transmission path, and a transmission path from the relay terminal. A display device for displaying the content of a signal transmitted to the processing device via a character, a memory for storing a character screen for displaying an abnormal condition, an alarm or a condition of operation limitation on the display device for each page number; A touch panel provided in the device, and a hand to the touch panel Or page number determining means for determining a page number to be read from the memory based on touch coordinate information generated by contact of a contactor, information from the processing device, and display stage information. Crane status display device. 2. The hook height detecting means according to claim 1, wherein the page number determining means displays the hook height by the display device in a normal state when no abnormality or a situation in which an alarm should be issued has occurred. A status display device for a crane, which is characterized in that