JP2637355B2 - Tower crane collision prevention method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing collision of a tower crane used in construction work or the like.

[0002]

2. Description of the Related Art The object of collision prevention of a tower crane used in construction work or the like is disclosed in, for example,
In the crane monitoring method and apparatus proposed in Japanese Patent No. 87198, a tower crane installed adjacently is targeted for collision prevention. Also, Japanese Patent Application Laid-Open No. 1-1816
In the work range control method proposed in Japanese Patent Publication No. 96, a road, an adjacent building, and an adjacent crane are targets for collision prevention.

[0003] In addition, all of the currently provided collision prevention methods are the same objects as described above.

[0004]

When a building or the like is constructed with a tower crane equipped with a collision prevention device as described above, no attempt is made to prevent a collision of a suspended load or the like on the building under construction. In this case, it is a reality that the operator of the tower crane operates without collision with skilled driving skills and intuition. In recent years, when the number of operators with skilled driving skills is decreasing and the crane is to be automated, it is necessary to prevent collision with the building currently under construction. In this case, the building currently under construction gradually extends upward. For example, when one pillar is erected, it is necessary to set an obstacle in a peripheral block. Naturally, it is necessary that the suspended load or the like can freely pass through the area where no obstacle is set.

An object of the present invention is to provide a method for preventing collision of a tower crane which performs proximity control using a building under construction as an obstacle.

[0006]

According to the present invention, a control device sets a set distance for a separation distance from a building under construction, and recognizes the building as an obstacle area for the operation of a tower crane. The device automatically controls the deceleration and stop of the tower crane when the separation distance becomes less than the set distance. In the tower crane collision prevention method, every time a suspended load is attached to the building, the control device adds a new obstacle to the suspended load. The area is automatically recognized and the proximity control of the next suspended load is performed.

[0007]

In the method of the present invention, each time a suspended load is attached to a building, the building to which the suspended load is attached is taken in as an obstacle, and proximity control of the suspended load is performed based on this. Therefore, collision between the suspended load and the building is reliably prevented.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a control device (not shown) is set for the control to set a set distance with respect to a separation distance A between the suspended load 10 and the frame 20 under construction, and recognize the frame 20 as an obstacle area B for crane operation. Let it. Accordingly, when the separation distance A becomes equal to or less than the set distance, the control device automatically controls the deceleration and stop of the tower crane 1 and performs the proximity control of the suspended load 10.

In FIG. 2, when the operator operates the tower crane 1 and lifts the load 10 to approach the frame 20 as shown in a path P, the control device determines the distance A between the upper and lower sides and the left and right of the load 10. Is compared with the set distance, and the above automatic control is performed.

Next, as shown in FIG. 3, when the suspended load 10 is attached to the frame 20, the control device automatically recognizes the frame 20 plus the frame 21 of the suspended load 10 as a new obstacle area B1. For the proximity control with the suspended load 11.

Next, as shown in FIG. 4, when the operator operates the tower crane 1 and lifts the load 11 to approach the frame 21 as shown in the path P1, the control device moves the load 11 up and down. The left and right separation distance A is compared with the set distance, and the above automatic control is performed.

Next, as shown in FIG. 5, when the suspended load 11 is attached to the frame 21, the control device automatically recognizes the frame 22 of the plus load 11 as a new obstacle area B2. The proximity control is performed, and the same proximity control as described above is performed. When there is no suspended load, the hook 2 and the wire 3 of the tower crane 1 and the skeletons 20 to 22 are used.
And proximity control.

[0014]

As described above, according to the present invention, the following excellent effects can be obtained. (A) Since the building to be built varies depending on the order in which the materials are transported, it cannot be predicted in advance and converted into data. You can know the thing area. (B) Therefore, the control device can directly control the obstacle as the building under construction progresses. (C) The collision of suspended loads can be prevented with respect to a growing building by a relatively simple program.

[Brief description of the drawings]

FIG. 1 is a side view illustrating a state at the start of lifting of a suspended load.

FIG. 2 is a side view illustrating an aspect of proximity control with respect to the suspended load of FIG. 1;

FIG. 3 is a side view showing a state in which attachment of reference numerals in FIG. 1 has been completed and a next suspended load is lifted.

FIG. 4 is a side view illustrating an aspect of proximity control with respect to the suspended load in FIG. 3;

FIG. 5 is a side view showing a state where the attachment of the suspended load of FIG. 4 is completed.

[Explanation of symbols]

 A: Separation distance B, B1, B2: Obstacle area P1, P2: Path 1: Tower crane 2: Hook 3: Wire 10, 11: Suspended load 20, 21, 22, ... frame

Claims (1)

(57) [Claims] 1. A control device sets a set distance for a separation distance from a building under construction, and causes the control device to recognize the building as an obstacle area for tower crane operation. In a tower crane collision prevention method for automatically controlling deceleration and stoppage of a tower crane, each time a suspended load is attached to a building, the control device automatically recognizes a new obstacle area to which the suspended load is added, and recognizes a next obstacle area. A collision prevention method for a tower crane, comprising controlling proximity of a suspended load.