JPH04112196A - Performance display device for every extension/ contraction mode of transfer type crane - Google Patents

Abstract

PURPOSE:To improve the efficiency in crane work by reading and displaying the allowable load data for each turn-down angle and working diameter with each boom length, in each extension/contraction mode, having the detection signal of the boom length as read-out signal. CONSTITUTION:The detection signal supplied from a boom length detector 6 is inputted into the controller 9 of an information processing device 7 and calculated. In the controller 9, a program ROM 10 which memorizes the information related to the calculation procedures, ROM 11 which memorizes the data necessary for the calculation processing, and a RAM 12 which memorizes the data of the result of the calculation processing are provided. An output interface 14 which includes a video RAM 14a for outputting the result of the calculation processing on a display 8 and a video ROM 15 which memorizes the data related to the screen frame of the display 8 are provided. Since, in the ROM 11, the data related to the allowable suspended load as the extension/contraction boom length and turning down angular function is memorized for each extension/ contraction mode, working efficiency can be improved.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a mobile crane equipped with a telescopic boom capable of being driven up and down, and in particular, the telescopic boom has a distal boom section within a proximal boom section. This invention relates to a performance display device for each telescoping mode of a mobile crane, which is constructed so that sections can be telescopically inserted one after another and telescopically driven in a plurality of telescoping modes by a telescoping drive device interposed between each boom section.

(Prior Art) As shown in FIG. 4, a mobile crane A is constructed by attaching a telescoping boom 3 to a swivel base 2 mounted on a vehicle 1 so as to be able to swing freely.

The telescopic boom 3 is extended and retracted by a telescopic drive device (not shown) interposed between each boom section 3a, 3b, 3c, and 3d by telescopically inserting the distal end boom section into the proximal boom section one after another. The crane operation is performed by stably supporting the vehicle l using the outrigger 4, driving the swivel platform 2 to swivel, driving the telescopic boom 3 to raise and lower it, and driving the telescopic boom 3 to extend and retract.
This is done by winding up and lowering a hook block 5 suspended from the tip of the hook block.

By the way, the permissible lifting load of this type of mobile crane A is generally determined by the stability limit of the entire mobile crane A including the lifting load or the strength of the boom, for each boom operating position determined by the boom length and the up-and-down angle of the telescopic boom 3. The limit is determined depending on whichever is lower.

On the other hand, the telescopic boom 3 has different elongated tubes for each telescopic mode to realize an intermediate boom length. Typical telescoping modes include the so-called normal sequential telescoping mode, in which the boom section on the proximal side is expanded sequentially and the boom section on the distal side is sequentially contracted, and the boom section is sequentially extended from the boom section on the distal side, and the boom section on the proximal side is expanded sequentially. There is a so-called reverse sequential expansion and contraction mode in which the boom sections 3b and 3c of each stage are expanded and contracted by the same amount at the same time. Since the strength of the telescopic boom at the intermediate boom length and the stability of the entire mobile crane including the suspended load differ for each of these telescoping modes, by selecting and using the appropriate telescoping mode, the capacity of mobile crane A can be adjusted. It has the advantage of being able to bring out the maximum potential. For this reason, in recent years, mobile cranes that can extend and retract the telescopic boom 3 in a plurality of telescoping modes have been on the market.

However, for such mobile crane A, the choice of which extension/contraction mode to select depends on the experience and intuition of the crane operator, and it is difficult to maximize the lifting capacity of mobile crane A. The problem was that it was difficult.

This invention solves the problems of the prior art described above, and provides reference data for crane operator's selection of telescopic mode.
It is an object of the present invention to provide a performance display device for each telescopic mode of a mobile crane that displays the crane lifting capacity for each of a plurality of telescopic modes on a display in a comparative manner.

(Means for Solving the Problems) In order to achieve the above object, the performance display device for each telescopic mode of a mobile crane of the present invention is configured as follows.

A mobile crane equipped with a telescoping boom capable of raising and lowering, particularly a telescoping drive in which the telescoping boom is interposed between each boom section by telescopically inserting a distal end boom section into a proximal boom section one after another. A telescoping mode performance display device for a mobile crane configured to be telescopically driven in a plurality of telescoping modes by the device, comprising: a boom length data input means for inputting data related to the length of the telescoping boom; Permissible lifting load data as a function of the boom length and luffing angle of the telescopic boom or the boom length and working radius of the telescopic boom is stored for each telescopic mode, and the boom length signal from the boom length data input means is used as a readout signal. , read out the lifting allowable load data for each luffing angle or each working radius at the specified boom length for each telescopic mode, and display the read data on the display described below for each luffing angle for each telescopic mode. Alternatively, it is characterized by comprising an information processing device that outputs image data for displaying allowable lifting load data for each working radius in a comparable manner, and a display that receives and displays image data from the information processing device. mobile crane.

Performance display device for each expansion/contraction mode.

(Function) According to the above configuration, as soon as boom length data is input through the boom length data input means, the lifting allowable load data for each luffing angle or each working radius for each extension/contraction mode is displayed on the display. It is displayed so that it can be compared.

Therefore, by looking at this display, the crane operator can determine under which extension/retraction mode the input boom length should be achieved at a range of lofting angles or working radii to maximize the lifting capacity of the mobile crane. This allows you to instantly judge whether or not you can perform to your full potential.

(Example) Hereinafter, an example of the performance display device for each telescopic mode of a mobile crane of the present invention will be described based on FIGS. 1 to 3.

The performance display device for each telescopic mode of a mobile crane according to the present invention is used in the mobile crane A shown in FIG. 4 and described above. Hereinafter, an embodiment of a mobile crane in which the telescopic boom 3 can be telescopically driven in two telescopic modes, a normal sequential telescopic mode and a simultaneous telescopic mode will be described with reference to FIGS. 1 to 3.

In FIG. 1, reference numeral 6 denotes boom length data input means for inputting data l related to the length of the telescopic boom 3. 7
is an information processing device that receives the boom length signal l from the boom length data input means 6, processes it, and outputs image data. 8 is a display that displays the contents of the image data from the information processing device 7.

The boom length data input means may be manually inputted directly by the crane operator, or the telescopic boom 3 may be used to input the actual boom length of the mobile crane A.
A boom length detector may be used to detect the actual boom length of the boom.

The information processing device 7 includes a control device 9 configured with a CPU.
．． Program ROM10. which stores information regarding the calculation procedure of the control device 9. A data ROM 11 stores data necessary for arithmetic processing of the control device 9, a RAM 12 temporarily stores data related to arithmetic processing results of the control device 9, and boom length data from the boom length data input means 6 is transferred to the control device 9.
An output interface 14 including a video RAM 14a for outputting the arithmetic processing results of the control device 9 so as to be displayed on the display 8, and a video ROM 15 storing data regarding screen frames of the display 8. ing.

The data ROM II stores data regarding the permissible lifting load W of the mobile crane A as a function of the boom length and the heave angle e of the telescopic boom 3 for each telescoping mode (normal sequential telescoping mode and simultaneous telescoping mode). has been done.

The control device executes the following calculation process based on the calculation procedure stored in the program ROM10.

a) Using the boom length signal Lx inputted through the input interface 13 as a successive signal, from among the data group stored in the data ROM 1l, a group of lifting allowable load data for each luffing angle at the particular boom length is extracted for each expansion/contraction mode. read out.

Then, this successive data group is temporarily stored in RAM II together with the boom length signal Lx which is a readout signal.

The data stored in RAM II at this time is as follows.

Boom length signal input from the boom length data input means 6; L Allowable lifting load for each boom lifting angle when achieved, θ3 W3 W3 knee
-→ b) Next, data regarding the screen frame is read from the video ROM 1.5, and the screen frame corresponding to this screen frame data is displayed on the display 8.The data is sent to the corresponding address in the video RAM 14a of the output interface 14. store.

Furthermore, the data stored in the RAM 12 (L memory) is read out to create image data (numerical images, etc.), and in order to display this image data at an appropriate position in the screen frame displayed on the display 8, the correspondence in the video RAM 14a is read out. Save it to the address you want.

C) Controlling the output interface 14 to output video RA
The data stored in M14a is displayed on the display 8.

The display 8 shows a display as shown in FIG.

As a result of such arithmetic processing by the control device 9, the display 8 displays permissible lifting load data for each undulation angle for each expansion/contraction mode in a manner that allows comparison.

Therefore, by inputting desired boom length data from the boom length data input means 6 and viewing the display screen of the display 8, the crane operator determines which extension/retraction mode should be used to achieve the boom length according to the input. This makes it easy to determine whether the lifting capacity of type crane A can be maximized.

In the above embodiment, the image displayed on the display 8 is in a table format, but it goes without saying that the image may be in a graph format as shown in FIG. 3, for example. In this case, the allowable lifting load W for each telescopic mode corresponding to the input of the boom length data input means 6 is
A two-dimensional graph regarding the permissible lifting load and the boom lifting angle is displayed so that the magnitude relationship can be discerned.

Furthermore, in the above embodiment, the allowable lifting load W of the mobile crane A was explained as a function of the boom length L1 of the telescoping boom, the boom hoisting angle e, and the telescoping mode, but depending on the type of mobile crane, The permissible lifting load W is a function determined by using, in addition to these variables, the amount of extension of the outrigger 4, the direction of rotation of the swivel base 2, the weight of the counterweight, etc. In such a mobile crane, the data ROM 1l in the above embodiment is
"Data regarding the allowable lifting load W of the mobile crane A as a function of the boom length and the heave angle θ of the telescoping boom 3 for each telescoping mode" stored in the outrigger
4, each rotation direction of the swivel base 2, and each weight of the counterweight, and added data input means for inputting data corresponding to these added variables to the information processing device 7. The signals from the data input means are used to determine the boom length and heave angle θ of the telescopic boom 3 for each telescopic mode at a specific outrigger extension amount, a specific rotation direction of the swivel base, and a specific counterweight weight. It is sufficient to select the address group of "data regarding the allowable lifting load W of the mobile crane A as a function" and then perform the arithmetic processing shown in the above embodiment. In this case, the input data from the added data input means is also displayed on the display 8. The added data input means may be directly operated manually like the boom length data input means 6, or may be input by inputting information such as the actual outrigger extension amount to the mobile crane and the rotation of the swivel base. Of course, it may also be used as a detector for detecting direction and counterweight weight.

Furthermore, in the above embodiment, data regarding the permissible lifting load W of the mobile crane A as a function of the boom length and the luffing angle e of the telescoping boom 3 is stored in the data ROMII for each telescoping mode (normal sequential telescoping mode and simultaneously). In the data ROMII, data regarding the permissible lifting load W of the boom length of the telescopic boom 3 is stored for each telescopic mode (normal sequential telescopic mode and simultaneous telescopic mode). Of course, the information may be stored in the memory. In this case, in the explanatory text of the above embodiment and in FIG.
and rRJ.

(Effects) Although the embodiments have been described above, in any case, the performance display device for each telescopic mote of a mobile crane according to the present invention is capable of inputting boom length data via the boom length data input means. The allowable lifting load data for each luffing angle or each working radius for each extension mode is displayed in a comparable manner on the display, so the crane operator can determine the input boom length by looking at this display. If the range of the lifting angle or working radius is achieved under the expansion and contraction mode, it can be immediately determined whether the lifting capacity of the mobile crane can be maximized. Therefore, it is possible to perform crane work by selecting the optimum telescoping mode from among a plurality of telescoping modes without hesitation, which has the excellent effect of maximizing the capabilities of the mobile crane.

[Brief explanation of drawings]

1 to 3 show an embodiment of the performance display device for each telescopic mode of a mobile crane according to the present invention. FIG. 1 is an explanatory diagram of the configuration, and FIG. FIG. 3 is an explanatory diagram showing another example of a screen displayed on the display. FIG. 4 is an explanatory diagram of the mobile crane. Figure 3

Claims (1)

[Scope of Claims] A mobile crane A comprising a telescoping boom 3 capable of being driven up and down, in particular, the telescoping boom 3 is configured such that the boom section on the tip side is telescopically inserted into the boom section on the proximal end one after another. A performance display device for each telescoping mode of a mobile crane A configured to be telescopingly driven in a plurality of telescoping modes by a telescoping drive device interposed between boom sections, the data relating to the length of a telescoping boom 3. A boom length data input means 6 for inputting the boom length L and the luffing angle Θ of the telescopic boom 3, or permissible lifting load data W as a function of the boom length L and working radius R of the telescopic boom 3 is stored for each telescopic mode. The boom length signal L from the boom length data input means 6
Using x as a readout signal, the permissible lifting load data for each luffing angle or each working radius at the specified boom length is read out for each telescopic mode, and this read data is displayed on the display 8 (described later) for each telescopic mode. an information processing device 7 that outputs lifting allowable load data for each different elevation angle or each working radius as image data for displaying the same in a comparable manner; and the information processing device 7
A display 8 for receiving and displaying image data from a mobile crane.