JPH10203776A - Cargo hoisting device of crane and cargo lowering method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the turn of a cargo hoisting device securely and stop it at a desired position by providing a hoisting tool for hoisting a cargo at one end of a hoisting beam and providing a gyro device at a position different from that of the hoisting tool. SOLUTION: A main body part 2 is hoisted from a hook block 1 through a wire W, hoisting support parts 4 are integrally connected with one end side of the main body part 2 by crossing like character T, and a hook 11 for hoisted cargo 12 is provided at one end of a hoisting beam consisting of the hoisting support parts 4. A gyro device 7 is provided at a position different from that of the hook 11, this gyro device 7 is provided with a flywheel 7c which rotates and supports through a gimbal frame 7b in a boxlike sealed casing 7a, and this flywheel 7c controls directions by a motor for rotation and drive and a plurality of control motors for tilt and drive. Consequently, it is possible to control the turn of a cargo hoisting device securely and stop it at a desired position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane equipped with a gyro device and a method of unloading the crane.

[0002]

2. Description of the Related Art A lifting device for lifting a suspended load supports a plurality of suspended loads below a suspension beam suspended from a hook block. The center of gravity of the suspended load is usually located immediately below the hook block. It is lifted to the target position while maintaining its balance.

When unloading suspended materials such as materials into a building under construction, the eaves on the upper floor such as a veranda become obstacles. In such a case, the suspended load is manually applied using a rope or the like. In such a case, there is a problem that it takes a lot of time and labor for a heavy load in a building.

In order to solve such a problem, for example, as shown in Japanese Patent Application Laid-Open No. 4-365791, a suspended load is suspended at one end of a suspended beam, and a balance weight is movably disposed at the other end. A hanging device in which a hanging beam is connected to a hook block via a turning device, the hanging beam is turned at a lifting position to place a load at a target position, and the load is lowered, or JP-A-7-69579. As shown in (1), a device for turning a suspension beam using thrust of a fan instead of a turning device has been developed.

[0005] However, any of the lifting devices provided with these turning mechanisms has the following disadvantages.

[0006]

First, in the former structure in which the turning is performed via the turning device, the hook block is used as a reaction force of the turning force, and the hook block is suspended only by the wire tension on the crane. However, since the torsion is generated by the moment in the direction opposite to the turning direction when the suspension beam is turned, there is a disadvantage that the control accuracy is lacking.

In the latter structure in which the fan is turned using the propulsive force of the fan, the fan tries to continue turning even when the rotation is stopped due to inertia at the time of turning, and a delicate operation such as a reversing operation in consideration of timing is required. It was necessary and it was difficult to stop at the correct position.

By the way, the present applicant has previously developed a gyro device as a device for obtaining thrust for turning. This gyro device is a device in which a flywheel that rotates at a high speed in a box is supported and stored by a gimbal frame. By controlling the tilting of the gimbal frame, a turning force is generated on an object in which the box is fixed. The turning control can be performed more accurately than the device of the above.

The present invention has been made in view of the good characteristics of the gyro apparatus described above, and its object is to make it possible to control the turning more reliably than any conventional gyro apparatus and to stop at a desired position. It is an object of the present invention to provide a crane lifting device that can be used and a method of unloading the crane so that the crane operation can be facilitated.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, a hanging member for hanging a load is provided at one end of a hanging beam, and a position different from the hanging member is provided. A gyro device is provided.
As described above, the gyro device is a device in which a flywheel that rotates at a high speed in a box is supported and stored by a gimbal frame. . Therefore, according to the present invention, since the gyro device can be balanced with the suspended load suspended by the hanging device as a counterweight, the turning control can be performed more reliably than any of the conventional devices, and the gyro device can be stopped at the stop position. Can be.

According to a second aspect of the present invention, the suspension beam supporting portion of the suspension beam is a rod-shaped member orthogonal to the suspension beam main body, so that the suspension beam has a T-shaped planar shape. It is a feature. Therefore, in the present invention, while suspending both ends of a horizontally elongated member in a plane such as a beam member or a wall member, eccentrically supported from a hanging rope of a crane, and suspended in a required posture on a convoluted portion such as a veranda of a multilayer building. To be included.

[0012] The invention according to claim 3 of the present invention is characterized in that the gyro device is movable along the longitudinal direction of the suspension beam. Therefore, according to the present invention, the horizontality of the suspended beam can be kept constant according to the load balance between the suspended load and the gyro.

According to a fourth aspect of the present invention, the suspension beam is provided with an inclinometer, and the movement of the gyro device is controlled so that the inclination of the inclinometer becomes zero. It is. Therefore, in the present invention,
The horizontal level of the suspended beam can be automatically kept constant when the suspended load is applied or when the suspended load arrives.

The invention according to claim 5 of the present invention is characterized in that the suspension beam has a plurality of suspended load supporting portions and is attached to both sides of the suspended beam main body. Therefore, according to the present invention, it is possible to transport a plurality of suspended loads by one crane lifting operation while eliminating the problem that the suspended beam is unbalanced due to the load of the other suspended load when one suspended load is unloaded. it can.

According to a sixth aspect of the present invention, the plane shape of the suspension beam is T-shaped or I-shaped by forming the suspended load supporting portion of the suspension beam as a rod-shaped member orthogonal to the suspension beam main body. It is characterized by having made it. Therefore, in the present invention, while suspending both ends of a horizontally elongated member in a plane such as a beam member or a wall member, eccentrically supported from a hanging rope of a crane, and suspended in a required posture on a convoluted portion such as a veranda of a multilayer building. To be included.

According to a seventh aspect of the present invention, a suspended load support is provided at one end or both ends of the suspended beam, and a counterweight is movably provided along the suspended beam, and is operated by a wireless operation or a manual handle operation. The counterweight is advanced, and the suspended beam is positively and gradually inclined to land the suspended load on the floor. Therefore, according to the present invention, the trouble of communicating with the crane operator can be saved, and the work load of the crane operator can be reduced. In the present invention,
“Forward” means movement to the suspended load side to be unloaded.

[0017]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a side view of a lifting device according to the present invention, and FIG. 2 is a plan view of the same.

In the figure, a suspension beam is composed of a main body 2 suspended from a hook block 1 via a wire W, and a suspended load supporting portion 4 integrally connected to one end of the main body 2 in a T-shape. It consists of

The main body 2 is a combination of a pair of channel steels 2a. A motor 5 is mounted on the other end of the main body 2, and the motor shaft is disposed between the channel steels 2a. It is connected to the ball screw feed mechanism 6. The screw feed mechanism 6 includes a guide block 8 for supporting a gyro device 7 disposed below the main body 2 as shown in a cross section in FIG.
, The screw feed mechanism 6 is driven forward and reverse by the forward and reverse rotation of the motor 5, the guide block 8 is moved forward and backward in the direction of the arrow, and the gyro device 7 is moved from the retracted position shown to the substantially center position of the main body 2. I am able to move.

The gyro device 7 includes a flywheel 7c which is rotatably supported via a gimbal frame 7b in a box-shaped closed casing 7a. The flywheel 7c is provided with a rotation driving motor (not shown) and a tilt drive. The direction is controlled by a plurality of control motors. The gyro device 7 also functions as a counterweight according to its size and weight.

Further, an inclinometer 9 is disposed on the central upper surface of the main body 2, and a circuit for controlling the motor 5, a receiver for remote control of the gyro device 7, and a motor 5 are provided on the lower surface. And a box 10 in which a battery for driving the gyro device 7 and the like are housed.

The control circuit in the box 10 receives the input signal from the inclinometer 9 and, in accordance with the difference between the value and the reference value, that is, the level of the main body 2, is proportional to the difference. By moving the gyro device 7 by driving the motor 5 in the normal and reverse directions, the value of the inclinometer 9 is controlled to be 0, that is, the weight balance is always kept horizontal.

A pair of suspending hooks 11 are provided at the lower ends of both ends of the suspended load supporting portion 4, and a suspended load 12 is suspended through the hooks. In the case of the present example, the beam shape is applied to the case where the suspended load 12 is a long and narrow (horizontally long) member such as a beam member or a wall member, and is a shape example integrated into a T-shape. A structure may be adopted in which only the main body 2 is provided and only the main body 2 is hung on one end side facing the gyro device 5.

Next, a lifting operation using the above-structured lifting device will be described with reference to FIG. The figure shows a case where the suspended load 12 is carried in through a veranda 20 a on a predetermined floor of the building 20.

First, as shown in (a), the suspended load 12 extends in parallel to the vicinity of the veranda 20a on the corresponding floor of the building 20.
Then, as shown in (b), the crane operator drives the gyro device 7 to change the direction based on the wireless instruction of the slinging worker 21 waiting at the lifting site, as shown in FIG. Is set to the carry-in standby position facing the veranda 20a.

The gyro device 7 may be driven by the rigging worker 21 by radio control.

In this posture, the suspended load 12 contacts the floor of the veranda 20a by moving to the veranda 20a and performing a descending operation based on the instruction of the slinging worker 21. When the load balance of the main body unit 2 becomes closer to the rear part and starts to lean to the rear side, the inclinometer 9 detects this, and the gyro device 7 is driven by the motor 5 based on the detection output. Moves forward,
Keep the entire suspension beam horizontal.

When the load of the suspended load 12 is completely deposited on the floor, the gyro device 7 is positioned at the center of the main body 2 and stops. Therefore, even when the slinging worker 21 unpacks and lifts up again, the suspension beam is lifted while maintaining the horizontal posture.

In the above description, the unloading of the suspended load 12 to the veranda is all performed by the crane operation. After the suspended load is positioned above the unloading position on the veranda floor surface by the crane operation, the slinging worker is required to perform the operation. , And can be unloaded without crane operation. That is, in this state, the sling operator moves the gyro device (or the counterweight) forward (to the unloading side to be unloaded) by a wireless operation or a manual handle operation (not shown) for rotating the screw feed mechanism with the guide block. When the load is on one side, it can be moved to the center of the suspension beam), and the suspension beam can be positively and gradually inclined to land the suspension load on the veranda floor. Thereby, the trouble of communicating with the crane operator can be saved, and the work load of the crane operator can be reduced.

If the gyro device (or the counterweight) can be moved in this way, a plurality of suspended load supporting portions 4 may be attached to both sides of the suspended beam 2, and further, It is possible to make the support part 4 a rod-shaped member orthogonal to the suspension beam main body part, that is, to make the plane shape of the suspension beam into an I-shape.

[0031]

As is apparent from the above description, in the lifting device according to the present invention, by using the gyro device, the turning control can be performed more reliably than in any conventional device, and It can be stopped reliably, and can also serve as a balance weight.

Further, in the unloading method according to the present invention, by moving the counterweight and gradually landing the suspended load on the floor, the trouble of communicating with the crane operator can be saved, and the crane operation can be performed. Reduce the work load of the staff,
Thus, crane work can be easily performed.

[Brief description of the drawings]

FIG. 1 is a side view of a lifting device according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIGS. 4A to 4C are explanatory views showing work procedures using the hanging load device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hook block W wire 2 and 4 Hanging beam (2 main body part, 4 hanging load support parts) 5 Motor 6 Ball screw feed mechanism 7 Gyro device 9 Inclinometer 12 Hanging load

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Fumihiro Inoue 4-640 Shimoseito, Kiyose-shi, Tokyo Inside Obayashi Corporation Technical Research Institute

Claims (7)

[Claims] An apparatus for lifting a crane, comprising: a hanging member for hanging a load at one end of a hanging beam; and a gyro device provided at a different position from the hanging member. 2. A lifting device for a crane, wherein the plane shape of the suspension beam is T-shaped by making the suspension load support portion of the suspension beam a rod-shaped member orthogonal to the suspension beam main body. 3. A crane lifting device wherein the gyro device is movable along the longitudinal direction of the suspension beam. 4. The crane lifting device according to claim 3, wherein an inclinometer is provided on the hanging beam, and the movement of the gyro device is controlled so that the inclination of the inclinometer becomes zero. 5. The crane lifting device according to claim 3, wherein a plurality of hanging beam support portions of the hanging beam are provided and attached to both sides of the hanging beam body. 6. The plane shape of the suspension beam is T-shaped or I-shaped by making the suspension load support portion of the suspension beam a rod-shaped member orthogonal to the suspension beam main body. 6. The crane lifting device according to any one of 5. 7. A suspended load support portion is provided at one or both ends of a suspended beam, and a counterweight is movably provided along the suspended beam, and the counterweight is advanced by a wireless operation or a manual handle operation, and the suspended beam is positively moved. A method for unloading a suspended load of a crane, wherein the suspended load is gradually inclined and the suspended load lands on the floor.