JP2891124B2 - Communication equipment for crane operation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device for crane operation capable of displaying on a TV monitor from which position around the lower part of a crane a wireless call is made.

[0002]

2. Description of the Related Art Generally, in a crane operation such as a tower crane, an image picked up by a television camera provided at the end of a boom is displayed on a monitor TV provided near a driver's seat.
Wireless communication is performed between a hanging load slinging worker and a crane operator, and the crane operator performs an operation based on the instruction.

[0003]

However, the slinging worker is waiting at the stock yard (unloading side), at the unloading side, and at a plurality of other locations, respectively, and a plurality of workers simultaneously call a wireless telephone. Sometimes.

[0004] In this case, it is not possible for the operator to instantly judge where the operator is calling. In addition, in some cases, in response to the call, it is necessary to simultaneously perform an operation change or the like in accordance with an instruction, so that it is not possible to concentrate on driving, which may hinder crane operation work.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a communication device for crane operation capable of visually judging through a monitor TV which position of a slinging worker is calling. Is what you do.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a wireless communication between a radio located in an operator room of a crane and a radio carried by each of a plurality of slingers, In a crane operation in which a crane operator performs a driving operation based on an instruction of the slinging worker, a receiver including a plurality of receiving antennas for receiving a wireless electric field strength arranged near a slinging position,
Means for searching for the position of the transmission source by comparing the electric field strength received by the receiver, and a monitor TV in the operator room for displaying the search result as an image. (Claim 1). Preferably, the receiver is provided on a concentric circle centered on a base of the crane.

[0007]

According to the above construction, when a caller makes a call, an oscillating radio wave is received by the receiver, and from which position the oscillating radio wave is radiated is measured in accordance with the electric field strength, and a call is made based on the measurement result. The position is displayed on the monitor TV by a bright spot or the like. When oscillation occurs from a plurality of positions, the plurality of positions are displayed as bright spots or the like. The operator can judge the weight of the call content in consideration of the call position and the current operation content, and can select and interact with only the caller who is related to the currently performed operation.

According to the configuration of claim 2, it is easy to grasp the direction from the crane.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing a tower crane according to the present invention, FIG. 2 is a plan view, and FIG. 3 is a block diagram showing an electrical configuration.

In the figure, 1 is a building frame of a building that has already been constructed, 2 is a tower crane projecting from the top of the building frame 1, and 3 is a building site 4 at the periphery of the building 1 on the ground side.
It is a temporary enclosure surrounding the inside.

The tower crane 2 has a crane boom 2b which can be swiveled and tilted on a tower 2a, and an operator room 2c is arranged at the base thereof. Perform tilting and hoisting operations of the crane wire W and the like. TV camera 5 at the tip of crane boom 2b
Is suspended, and an image captured by the camera 5 is displayed on a monitor TV 6 provided in the operator room 2c.

There are a plurality of workers in the site 4, each worker carrying a portable radio Ta, Tb..., And a headphone-type radio which the operator wears in the operator room 2c as in the prior art. Communication with the handset 7 is possible.

In addition to the above configuration, a plurality of receiving antennas RA for receiving the electric field strength from each of the portable radios Ta and Tb are provided around four sides of the building frame 1.
RB, RC, RD... Are fixedly arranged. Each of the antennas RA, RB,... Is connected to a receiver 9 for wireless electric field strength measurement via a switch 8, and the electric field strength is constantly measured by the receiver 9.

The measured values and the antenna position information from the switching unit 8 are sent to the radio wave transmission position information recognition device 10, where the position of the portable radios Ta and Tb is determined. This recognition device 10 is composed of a computer or the like. For example, in FIG. 2, the radio device Ta is closest to the installation position of the reception antenna RC of the building frame 1 and is located at a position slightly away from the installation position of the reception antenna RB. In this case, the intersection of the electric field strengths of the antennas RC and RB and the respective reception positions is calculated, so that the radio T
The plane coordinate position of a is specified. The transmission position of the wireless device Tb is also specified.

This position information is displayed on the monitor TV 6 via the VTR input device 11 as a bright spot or the like. For example, a part of the landscape imaged by the TV camera 5 is cut out and the building frame 1 is centered, and the position relative to that position is displayed as a bright spot. If it is desired to display the calling order, numerical values such as 1, 2,... Can be displayed in the calling order.

Therefore, the operator determines the weight of the call contents in consideration of the call position and the current operation contents, and selects only the caller who is related to the operation currently being performed. It suffices to concentrate on the operation while interacting, and to respond to other call contents after the operation is completed.

In the embodiment, for the sake of simplicity, only the detection of a call position on the stock yard side of the ground portion has been described. .

[0018]

As described in detail in the above embodiments, in the communication device for crane work according to the present invention, the position of the caller can be visually judged through the monitor TV instantaneously. And the current operation content, it is possible to judge the weight of the call content and to select and communicate only with the caller who is related to the current operation. There is an advantage that the performance can be further improved.

Further, according to the configuration of claim 2, there is an advantage that it is easy to grasp the direction from the crane.

[Brief description of the drawings]

FIG. 1 is a side view of a building frame provided with a tower crane according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a block diagram illustrating an electrical configuration of the communication device.

[Explanation of symbols]

 Reference Signs List 1 Building frame 2 Tower crane 2c Operator room 6 Monitor TV 7 Headphone type wireless handset (operator wireless device) Ta, Tb Portable wireless device RA, RB, RC, RD Receiving antenna 9 Receiver for measuring radio field strength 10 Radio wave transmission position recognition device 11 VTR input device

Claims (2)

(57) [Claims] 1. A wireless communication is performed by a wireless device disposed in an operator room of a crane and a wireless device carried by each of a plurality of sling operators, and a crane operator performs an operation based on an instruction of the sling operator. In a crane operation, a receiver provided with a plurality of receiving antennas for receiving a wireless electric field intensity arranged near a slinging position, and means for comparing the electric field intensity received by the receiver to search for the position of the transmission source ,
A communication device for crane operation, comprising a monitor TV in the operator room for displaying the search result as an image. 2. The communication device for crane operation according to claim 1, wherein the receiver is provided on a concentric circle centered on a base of the crane.