JPH0761775A - Air bag crawler crane - Google Patents

Abstract

PURPOSE:To reduce a load applied to a floor per unit area by dispersing the weight of a crane including the load of a suspended article so as to enable the crane to move on the floor. CONSTITUTION:An air bag crawler crane 1 comprises an air bag 2 which is formed by a flexible member and has a designated air pressure, and a truck 3 which is placed on the air bag 2 and is adapted to move the air bag 2 by the drive of a caterpillar 8 to travel. Further, the crane 1 includes a crane 4 provided on the truck 3, a counter weight 10 movably provided on the truck 3, a sensor 11 for detecting inclination of the truck 3, and a control means 12 for moving the counter weight 10 in such a manner that the truck 3 is balanced on the air bag 2 according to the detection of inclination of the truck 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air bag crawler crane used in, for example, construction work.

[0002]

2. Description of the Related Art For example, in construction work, crawler cranes, tower cranes, etc. are used for building construction members. The crawler crane can be freely moved by a caterpillar, and the tower crane is installed at a predetermined position and work is performed by these cranes.

[0003]

By the way, the crawler crane cannot be used unless there is enough space on the site, and when the tower crane is installed in a building, there are problems such as a hole in the floor.

For this reason, when construction work on a narrow site does not have enough room on the site and ordinary cranes cannot be used, or it is possible to run on the floor under construction, for example, precast reinforced concrete members can be installed. A possible crane is required.

The present invention has been made in view of the above point, and the load per unit area applied to the floor can be reduced by dispersing the crane weight including the suspended load, and the floor can be freely moved. It is intended to provide an airbag crawler crane that can be moved to.

[0006]

In order to solve the above problems, an air bag crawler crane according to a first aspect of the present invention comprises an air bag made of a flexible member and having a predetermined air pressure, and an air bag above the air bag. A carriage that is placed on the vehicle and can be moved by moving the air bag by driving a caterpillar, a crane provided on the carriage, a counterweight movably provided on the carriage, and a sensor that detects the inclination of the carriage. And a control means for moving the counterweight so as to balance the carriage on the airbag based on the detection of the inclination of the carriage.

[0007]

According to the first aspect of the present invention, by placing the crane on the air bag, the weight of the crane including the suspended load can be dispersed, thereby reducing the load per unit area applied to the floor.

When the caterpillar of the dolly is driven, the air bag moves and travels, whereby it is possible to travel on the floor under construction, and for example, precast reinforced concrete members can be installed.

Further, the sensor detects the inclination of the trolley, the counterweight is moved based on the detection of the inclination of the trolley, and the trolley is balanced on the air bag so that, for example, precast reinforced concrete members can be built and run. I am trying.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An air bag crawler crane according to an embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a side view of an air bag crawler crane, and FIG. 2 is a side view showing a state in which the crane is placed on the air bag.

This air bag crawler crane 1
Has an air bag 2, and this air bag 2
Is made of a flexible material such as specially processed cloth.
The air bag 2 has a predetermined air pressure, and the air bag is provided with a guide portion 2a from which a carriage 3 rides on the air bag 2 as shown in FIG. The guide portion 2a is attached to the airbag 2 so as not to get in the way when the carriage 3 rides on the airbag 2.

The trolley 3 is provided with a crane 4, which is an assembling type, and can be built by suspending a precast reinforced concrete member or the like by a wire 6 by the operation of a winch 5. is there. In this way, the carriage 3 provided with the crane 4 on the air bag 2
By loading the crane, the crane weight including the suspended load can be dispersed, and the load per unit area applied to the floor 7 can be reduced.

The carriage 3 has a caterpillar 8 made of, for example, hard rubber, and a power source 9 such as an engine or a motor.
When the caterpillar 8 is driven by, the air bag 2 moves and travels. For example, as shown in FIG. 1, when the caterpillar 8 is rotated in the direction of arrow A, the air bag 2 moves in the opposite direction B.
To move freely on the floor 7.

A counterweight 10 is movably provided on the carriage 3, and the carriage 3 on the airbag 2 is balanced by the movement of the counterweight 10. Also,
The carriage 3 is provided with a sensor 11, and the sensor 11 detects the inclination of the carriage 3. The detection signal of the sensor 11 is input to the control means 12, which controls the carriage 3
The counterweight 10 is moved based on the detection of the inclination of the carriage 3 to balance the carriage 3 on the airbag 2.

The sensor 11 is not particularly limited as long as it can detect an inclination angle and convert it into an electric signal. For example, a torque balance method of detecting an inclination angle with respect to the center of gravity of the earth and converting it into an electric signal is used. be able to.

FIG. 3 is a plan view showing a state where the air bag crawler crane is used for building, and FIG. 4 is a side view showing a state where the air bag crawler crane moves to the upper floor.

This air bag crawler crane 1
As shown in FIG. 3, when the caterpillar 8 of the carriage 3 is driven, the air bag 2 moves and travels freely, thereby lifting, for example, the precast reinforced concrete member 22 on the floor 21 of the building 20 under construction. To include. In this way, by placing the cart 3 equipped with the crane 4 on the air bag 2, the crane weight including the suspended load is dispersed, and thereby the load per unit area applied to the floor 21 under construction is reduced. You can

Then, as shown in FIG. 4, the airbag crawler crane 1 travels on a traveling plate 23 provided on the building 20 to move to the upper floor, and on the upper floor, as described above, the truck 3 is used. When the caterpillar 8 is driven, the air bag 2 moves and runs, which causes the floor 21 on the upper floor of the building under construction.
Above, for example, the precast reinforced concrete member 22 is lifted up for construction.

The crane 4 may be an assembling type, and the carriage 3 may be mounted on the air bag 2 before the assembling. The crane 4 may be provided on the bogie 3 without using the assembling type. But it's okay.

[0021]

As described above, the invention according to claim 1 disperses the crane weight including the suspended load by mounting the cart on the air bag and providing the crane, and the air bag is used. By doing so, the load per unit area applied to the floor can be reduced.

Further, when the caterpillar of the trolley is driven, the air bag moves and travels, so that the crane can freely move around on the floor under construction. It is possible to build members and the like.

Further, the sensor detects the inclination of the trolley, and the counterweight is moved based on the detection of the inclination of the trolley to balance the trolley on the air bag, for example, to build or run precast reinforced concrete members. Is possible.

[Brief description of drawings]

FIG. 1 is a side view of an airbag crawler crane.

FIG. 2 is a side view showing a state in which a crane is placed on an air bag.

FIG. 3 is a plan view showing a state in which building is performed by an air bag crawler crane.

FIG. 4 is a side view showing a state where the airbag crawler crane moves to an upper floor.

[Explanation of symbols]

 1 Airbag Crawler Crane 2 Airbag 3 Cart 4 Crane 8 Track 10 Counterweight 11 Sensor 12 Control means

Claims (1)

[Claims] 1. An air bag which is made of a flexible material and has a predetermined air pressure, a dolly which is placed on the air bag and can be moved by driving a caterpillar to drive the air bag, and this dolly is provided. A crane, a counterweight movably provided on the trolley, a sensor that detects the inclination of the trolley, and the counterweight is moved so as to balance the trolley on the airbag based on the detection of the inclination of the trolley. An air bag crawler crane, comprising: