JPH0710461A - Cargo hoisting device for crane - Google Patents

Abstract

PURPOSE:To simplify the travel control of hoisted cargo so as to greatly reduce the cost by moving a balance weight so as to incline a beam in order to longitudinally move the hoisted cargo along the inclined beam. CONSTITUTION:A hoisting beam 14 longitudinally projected is secured to the lower end part of a vertical hoisting member 12 hung at its upper end on an hook block of a crane. The length of the rearward projection of the beam 14 is made to be longer, and is attached thereto with a movable balance weight 18. A stationary sheave 24 is attached to the front end part of the hoisting beam 14, and a motor driven cylinder 26 and the like as a reciprocating drive device is set on the upper side of the beam 14. A rope 30 paid off from the motor driven cylinder 26 is wound around the stationary sheave 24, and is then suspended downward, and a cargo L such as curtain wall or the like is hung from an equalizer 32 attached to the lower end of the suspended rope. The balance weight 18 is moved in such a condition that the cargo L is hung on the equalizer 32, and accordingly, a cargo hoisting device 10 is inclined from a lift-up device of the crane.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane loader used when a load is hung under an obstacle.

[0002]

2. Description of the Related Art Conventionally, a crane is often used to lift a heavy object, but when a load is hung in a room or the like of a building using the crane, an obstacle such as a ceiling exists above the room. Therefore, in the past, for example, Japanese Patent Laid-Open No. 4-365
As disclosed in Japanese Patent No. 791, a loading / unloading device is provided at the tip of a horizontally extending beam so as to be extendable / contractible, and the loading / unloading device is extended so that the loading can be taken into a room. It has become.

In this case, since the load of the suspended load moves due to the expansion and contraction of the hoisting device, a balance weight is movably provided on the beam, and the balance weight is controlled to move as the hoisting device moves. , The moment due to the suspended load and the moment due to the balance weight are balanced.

[0004]

However, in such a conventional crane hoisting device, as described above, the hoisting device for the cargo is provided so as to be extendable / contractible on the horizontal beam,
Since the balance weight is moved as the hoisting device expands and contracts, the amount of movement of the balance weight needs to be controlled according to the amount of expansion and contraction of the hoisting device.
Therefore, there is a problem in that the control for moving the balance weight following the movement of the hoisting device becomes complicated, and the control device becomes large-scaled, and the cost is inevitably increased.

Therefore, in view of the conventional problems, the present invention simplifies the movement control of the suspended load by inclining the beam by moving the balance weight and moving the suspended load back and forth by the inclination of the beam. It is an object of the present invention to provide a crane lifting device capable of achieving a significant reduction in cost.

[0006]

In order to achieve the above object, the present invention is directed to a vertical suspension member which is hooked on a hook block of a crane, and fixed to a lower end portion of the vertical suspension member so as to project forward and rearward. Suspension beam, a lifting and unloading device fixed to the front end of the suspension beam in the front-rear direction, and movably attached to the suspension beam, and by the movement, the hanging portion of the vertical suspension member is a fulcrum. A balance weight for controlling the inclination amount of the suspension beam is provided, and the suspension lifting device is moved forward by changing the inclination amount of the suspension beam.

Further, the hoisting / unloading device includes a fixed sheave attached to the front end of the hoisting beam, a reciprocating drive device such as an electric cylinder installed in the hoisting beam, and a reciprocating drive device such as the electric cylinder. It is preferable that the rope to be fed out is hung around the fixed sheave so as to hang down, and a lifting tool attached to the end of the fixed sheave.

Further, the hoisting and unloading device can be constructed by including a winch attached to the front end of the hanging beam, a rope extended from the winch, and a hoist attached to the end of the rope. .

Further, it is desirable that the suspension beam is inclined and fixed to the vertical suspension member so that the rear side is upward.

[0010]

In the crane hoisting device of the present invention having the above construction, the balance weight is moved along the suspension beam fixed to the lower end portion of the vertical suspension member hooked on the hook block of the crane. By moving the balance weight, the suspension beam itself is tilted from the hooking portion of the vertical suspension member, so that the lifting / unloading device provided at the front end of the suspension beam can be moved forward. The unloading device can be fixedly provided in the front-back direction of the suspension beam. Therefore, since the front and rear movement of the suspended load lifting device is eliminated, in order to move the load horizontally, it is only necessary to actively perform the movement control of only the balance weight, which greatly simplifies the movement control of the suspended load. You can

The hoisting and unloading device includes a fixed sheave attached to the front end of the hoisting beam, a reciprocating drive device such as an electric cylinder installed on the hoisting beam, and a reciprocating drive device such as the electric cylinder. By arranging the rope to be fed around the fixed sheave and suspending it, and comprising a lifting tool attached to the end thereof, the lifting and lowering device can be easily moved up and down by the operation of the reciprocating drive device such as the electric cylinder. It becomes possible.

Further, the suspension beam is fixed to the vertical suspension member by inclining the suspension beam so that the rear side is upward.
Since the suspended load lifting device can be moved forward before and after the suspended beam is horizontal, the horizontal movement amount of the suspended load with respect to the inclination angle of the suspended beam can be increased.

[0013]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 3 show an embodiment of a crane lifting device 10 according to the present invention, FIG. 1 is a side view, FIG. 2 is a plan view of essential parts, and FIG. 3 is a schematic explanatory view showing an operating state.

That is, the crane lifting device 10 of the present embodiment.
As shown in FIG. 1, a vertical suspension member 12 that is suspended by being hooked on a hook block of a crane (not shown) is provided, and the lower end portion of this vertical suspension member 12 is forward (left in FIG. 1) and rearward. The suspension beam 14 projecting (to the right in FIG. 1) is fixed at a substantially right angle. The suspension beam 14 is formed of I-shaped steel, and the reinforcing beam 1 is attached to the lower end of the vertical suspension member 12 formed in a rod shape.
It is fixed through 6.

The amount of protrusion of the suspension beam 14 to the rear is larger than the amount of protrusion to the front, and the balance weight 18 is movably attached to this rear protrusion. An inclinometer 19 is attached to the suspension beam 12, and the balance weight 18 moves the suspension beam 12 via a drive device 18a while feeding back the measurement value of the inclinometer 19. A plurality of braces 20 and ropes 22 are attached to the rear protruding portion of the suspension beam 12 between the upper portion of the vertical suspension member 12 and the rear protruding portion is reinforced.

A fixed sheave 24 is attached to the front end of the suspension beam 12 and the reinforcing beam 16 is provided.
An electric cylinder 26 as a reciprocating drive device is installed on the upper side of the rope 3, and the rope 3 fed from an equalizer 28 attached to a telescopic piston 26a of the electric cylinder 26 is provided.
0 goes around the fixed sheave 24 and hangs downward. Then, at the end of the rope 30 that hangs from the fixed sheave 24, the equalizer 3 as a luggage hanging portion is provided.
2 is attached, and a luggage L such as a curtain wall is hung on the equalizer 32.

Therefore, in the crane hoisting device 10 having such a configuration, the hoisting device 10 shown in FIG. 3 is moved by moving the balance weight 18 while the luggage L such as a curtain wall is hung on the equalizer 32. As shown in the figure, the vertical suspension member 12, which serves as the hanging portion of the crane, is largely inclined about the upper end portion thereof. That is, by moving the balance weight 18 forward (to the left in FIG. 1), the moment of the luggage L such as the curtain wall whose suspension portion has been stopped is increased, and the suspension beam 14 moves to the state A in FIG. The front slopes downward as shown. Next, by moving the balance weight 18 rearward (to the right in FIG. 1) from this state, the suspension beam 14 goes from state B to state C in FIG. At this time, when the suspension beam 14 is tilted from the A state to the B state to the C state, the vertical suspension member 12 is largely tilted forward so that the lower end portion thereof is changed from the a state to the b state to the c state. It Therefore, the front end portion of the suspension beam 14 moves forward while moving upward, and the horizontal movement component of the suspended load can be earned by this forward movement.

Therefore, when a luggage L such as a curtain wall is hung from the outside with an obstacle above the room or the like,
First, the balance weight 18 is moved forward so that the suspension beam 14 is in the A state, and the luggage L such as a curtain wall is loaded.
The hoisting device 10 is moved to the vicinity of the room where the object is to be hoisted. Then, the balance weight 18 is gradually moved backward while the movement of the hoisting device 10 is stopped at a position near this chamber, and the hanging beam 14 is tilted from the B state to the C state so that the hanging beam 14 is hung on the equalizer 32. The lowered luggage L such as curtain wall can be moved forward and carried into the room.

As described above, in the crane hoisting device 10 of this embodiment, the balance beam 18 is moved to incline the suspension beam 14 itself, so that the suspension beam 1
Luggage L such as curtain wall hung at the front end of 4
Since the carriage is moved forward, it is possible to fix and install this hanging load lifting device in the front-back direction of the hanging beam. Therefore, since it is not necessary to control the longitudinal movement of the hoisting / unloading device, that is, the equalizer 32, only the movement control of only the balance weight 18 is actively performed to move the luggage L such as the curtain wall forward. Therefore, the movement control of the suspended load can be significantly simplified, and the structure of the control device itself can be simplified.

Further, the crane lifting device 10 of this embodiment.
In this case, after the rope 30 fed out from the electric cylinder 26 is circulated around the fixed sheave 24 at the front end of the suspension beam 14, the luggage L such as a curtain wall is suspended from the equalizer 32 attached to the lower end thereof. Since the load L such as the curtain wall can be easily moved up and down by operating the electric cylinder 26, the vertical variation of the load L such as the curtain wall due to the inclination of the suspension beam 14 can be easily performed. Can be corrected to.

FIGS. 4 and 5 show another embodiment, in which the same components as those in the above-mentioned embodiment are designated by the same reference numerals and the description thereof will be omitted. That is, in this embodiment, when the suspension beam 14 is fixed to the lower end of the vertical suspension member 12 as shown in FIG. 4, the angle θ is set so that the rear side of the suspension beam 14 is upward with respect to the vertical suspension member 12. It is attached by tilting in advance.

Therefore, in this embodiment, when the vertical suspension member 12 is oriented in the vertical direction as shown in FIG. 5, the suspension beam 14 is in a state in which the rear part is inclined upward as shown in the B1 state. When the balance weight 18 is moved forward from this state, the moment due to the suspended load is large and the suspension beam 14 is in the A1 state, while when the balance weight 18 is moved backward, the moment due to the balance weight is large and the suspension beam 14 is suspended. The beam 14 is in the C1 state. Therefore, the suspension beam 14 moves from the state in which the luggage L such as the curtain wall of C1 is hung on the equalizer 32 to the state in which the luggage L such as the curtain wall of A1 is suspended in the room. Moves in a state of being close to the tangent line in the horizontal direction, the forward movement amount of the suspended load with respect to the change in the inclination angle of the suspension beam 14 from A1 to C1 can be increased. In this way, by increasing the amount of forward movement of the luggage L such as the curtain wall, the movement distance when the luggage L such as the curtain wall is brought into the room is increased, and the size of the hanging device 10 is reduced. Can be planned.

In this embodiment, the fixed sheave 24 and the electric cylinder 26 are used as the hoisting / unloading device, but they may be replaced with winches and the rope 30 may be paid out from the winches.

[0024]

As described above, in the crane hoisting device according to the first aspect of the present invention, by moving the balance weight along the suspension beam, the suspension beam itself is suspended by the vertical suspension member. Since it is inclined from the stop part and the hoisting / unloading device provided at the front end of the hoisting beam is moved forward, this hoisting / unloading device can be fixed and provided in the front-back direction of the hoisting beam. Becomes Therefore, since the lifting / unloading device does not move back and forth, it is only necessary to actively perform the movement control of only the balance weight in order to horizontally move the load, which significantly simplifies the movement control of the hanging load and is inexpensive. It is possible to provide a simple hanging device.

According to the second and third aspects of the present invention, the hoisting / unloading device is reciprocally driven by a fixed sheave attached to the front end of the hoisting beam and an electric cylinder or the like installed in the hoisting beam. The apparatus and the reciprocating drive device or fixed sheaves thereof, and a rope extended from a winch replacing the reciprocating drive device circulates around the fixed sheave and hangs down. ,
By operating the reciprocating drive device such as the electric cylinder, the hoisting / unloading device can be easily moved up and down, and the correction operation of the vertical fluctuation of the hoisted load due to the inclination of the hoisting beam can be remarkably simplified.

Further, according to claim 4 of the present invention, since the suspension beam is fixed to the vertical suspension member by inclining it so that the rear side of the suspension beam is upward, the suspension beam is suspended before and after the suspension beam is horizontal. Since the unloading device can be moved forward,
Various excellent effects can be achieved in that the amount of horizontal movement of the suspended load with respect to the inclination angle of the suspended beam can be increased and the downsized load apparatus itself can be downsized.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a crane lifting device according to the present invention.

FIG. 2 is a plan view of an essential part showing an embodiment of the present invention.

FIG. 3 is a schematic explanatory view showing an operating state of one embodiment of the present invention.

FIG. 4 is a side view showing another embodiment of the present invention.

FIG. 5 is a schematic configuration diagram showing an operating state of another embodiment of the present invention.

[Explanation of symbols]

 10 Lifting device for crane 12 Vertical hanging member 14 Suspended beam 18 Balance weight 24 Fixed sheave 26 Electric cylinder (reciprocating drive device) 32 Equalizer (Suspended load lifting device) L Luggage

Claims (4)

[Claims] 1. A vertical suspension member hooked on a hook block of a crane, a suspension beam fixed to a lower end portion of the vertical suspension member and projecting forward and backward, and a front and rear portion at a front end portion of the suspension beam. And a balance weight that is movably attached to the suspension beam and that controls the inclination amount of the suspension beam by using the suspension portion of the vertical suspension member as a fulcrum. A lifting device for a crane, wherein the lifting device is moved in a horizontal direction by changing an inclination amount of a hanging beam. 2. The hoisting and unloading device comprises: a fixed sheave attached to a front end of a hanging beam; a reciprocating driving device such as an electric cylinder installed in the hanging beam; and a reciprocating driving device such as the electric cylinder. The hoisting device for a crane according to claim 1, further comprising: a hoisting device attached to an end of the rope that is wound around the fixed sheave so as to hang down around the fixed sheave. 3. The hoisting and unloading device comprises a winch attached to the front end of the hoisting beam, a rope extended from the winch, and a hanger attached to the end of the rope. The hanging device for a crane according to claim 1 or 2. 4. The hoisting device for a crane according to claim 1, wherein the hoisting beam is fixed to a vertical hoisting member by inclining the hoisting beam so that a rear side thereof faces upward.