Work plan verification device

Patent metadata

Field	Value
Publication number	US-9540218-B2
Application number	US-201314425495-A
Country	US
Kind code	B2
Filing date	Aug 8, 2013
Priority date	Sep 5, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

Provided is a work plan verification device capable of improving work efficiency of movement work of a suspension load. The work plan verification device determines whether an operator indicates a movement position of the suspension load on an image (A) displayed on a monitor ( 30 ). When a determination is made that the movement position is indicated, a mark is displayed on the movement position (B). Subsequently, a determination is made that the suspension load is suspended on a boom. When the determination is made that the suspension load is suspended, a load factor (C 1 ) which is moving determination information allowing an operator to determine whether the suspension load can be moved to the movement position (B) is calculated, and the calculated load factor is displayed on the image (A).

First claim

The invention claimed is:

1. A work plan verification device that includes a boom telescopically formed and horizontally turnably and derrickably provided on a vehicle body of a crane and that is used to move a suspension load suspended from a tip end of the boom through a rope,
the work plan verification device, comprising:
a boom-derricking cylinder provided between the vehicle body of the crane and the boom and that derricks the boom;
a cylinder pressure sensor attached to the boom-derricking cylinder and that detects a pressure of the boom-derricking cylinder;
a boom length-sensor attached to the boom and that detects a length of the boom;
a derrick angle sensor attached to the boom and that detects a derrick angle of the boom;
an image creator that creates an image when viewing a lower portion from the tip end of the boom;
a monitor that displays the image;
a movement position inputter in that an operator indicates a movement position of the suspension load on the image displayed on the monitor; and
an arithmetic part that determines whether the movement position is indicated on the image and that acquires a three-dimensional coordinate position of the movement position, the three-dimensional coordinate position corresponding to the movement position indicated on the image, when it is determined that the movement position is indicated on the image,
wherein the arithmetic part calculates a total rated load based on the acquired three-dimensional coordinate of the movement position and determines whether the suspension load is suspended from the boom based on a change amount in the pressure of the boom-derricking cylinder acquired from the cylinder pressure sensor or a change amount in the derrick angle of the boom acquired from the derrick angle sensor,
when the suspension load is suspended from the boom, the arithmetic part calculates an actual load of the suspension load based on the pressure of the boom-derricking cylinder acquired from the cylinder pressure sensor, the length of the boom acquired from the boom-length sensor and the derrick angle of the boom acquired from the derrick angle sensor and calculates a load factor which is a ratio of the actual load to the total rated load, and displays the load factor on the image,
when the suspension load is not suspended from the boom, the arithmetic part determines whether a virtual load is input into the movement position inputter and calculates a load factor which is a ratio of the virtual load to the total rated load when the virtual load is input, and displays the load factor on the image.

2. The work plan verification device according to claim 1 ,
wherein, when the movement position is indicated, the movement determination information calculator displays on the image at least one of a height of the three-dimensional coordinate position of the movement position and a working radius about a turning center of the boom to the three-dimensional coordinate position of the movement position.

3. The work plan verification device according to claim 1 ,
wherein, when the movement position is indicated, the movement determination information calculator displays on the image a performance line relating to a maximum suspension weight performance of the suspension load to pass through the movement position.

4. The work plan verification device according to claim 1 ,
wherein the image creator creates, as images displayed on the monitor, an image on which the movement determination information is displayed and, prior to the image, an image by which the operator indicates the movement position.

5. The work plan verification device according to claim 1 ,
wherein the movement determination information calculator determines whether the movement position is indicated on the image, and displays, when the movement position is indicated, a mark at the movement position on the image.

Assignees

• Tadano Ltd

Inventors

• Tanizumi Kazuya
• Ishikawa Iwao
• Tsuda Kazuaki
• Fujiwara Shuji
• Munekiyo Masayuki

Classifications

• G06F30/20

  Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30) · CPC title

• B66C13/46 Primary

  Position indicators for suspended loads or for crane elements · CPC title

• B66C15/00 Primary

  Safety gear (for rope, cable, or chain winding mechanisms B66D1/54) · CPC title

• G06F17/10

  Complex mathematical operations {(function generation by table look-up G06F1/03; evaluation of elementary functions by calculation G06F7/544)} · CPC title

• B66C13/00

  Other constructional features or details · CPC title