JPH0940353A - Lifting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of work by enabling an arm of a lifting device to be inserted in the horizontal direction simply and correctly to objects to be lifted up in a veranda inside of a window. SOLUTION: A frame body 22 is lifted and held through a plurality of wire ropes 20, 21 for lifting up at the tip of a take-up wire 2 of a crane 1, and the frame body 22 is provided with an arm 27 for locking objects to be lifted up extendable freely to the approximate horizonal direction and a driving device driving the arm 27 forward or backward. Thereby, the arm 27 is inserted into a timbering a veranda to be locked only by an advance or retreat movement of the arm 27. Moreover, a counter weight 28 is linked so as to be shifted to the opposite direction of the arm 27, or a wire rope 21 of the backside is made to be adjustable extendably using an electric winch 25 so that a work is made to be more stabilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device used in connection with a winding wire of a crane, and particularly to a moving luggage or a veranda forming work from a veranda or a window of a building or a building under construction. The present invention relates to a lifting device suitable for carrying out or carrying in a shoring.

[0002]

2. Description of the Related Art FIG. 10 shows a conventional hoisting device 5 used for moving a shoveling work.
Arm 8 protruding horizontally forward, and a counterweight 9 disposed at the rear, and are suspended by a load cell 3 provided at the tip of the wire of the crane 1 by front and rear suspension wire ropes 10 and 11. I have.

The arm 8 of the lifting device 5 is of a fixed type, and the counterweight 9 is driven by an appropriate driving device.
The front and rear direction movement can be adjusted.

When the support T installed for veranda molding is carried out to the outside by the lifting device 5, first, the lifting device 5 is moved up and down to a predetermined distance to the side of the building by the undulating operation of the beam 6. The lifting device 5 is moved up and down while maintaining a predetermined distance from the building so that the arm 8 is at a height corresponding to the target shoring work T by the winding or unwinding operation of the winding wire 2.

[0005] Next, the arm 8 is moved forward in the horizontal direction while maintaining the predetermined height, and the arm 8 is inserted into the support T as shown by the imaginary line. As an operation for causing the beam 6 to fall, an operation to lower the beam 6 and an operation to wind up the winding wire 2 are performed simultaneously. In other words, the winding wire 2 is accurately wound up by the amount that the beam 6 is lowered by falling down.

After the insertion, by folding or contracting the legs of the support T, the upper pipe portion of the support T is placed on the arm 8 and then taken out horizontally rearward to the outside. In this case, the same height state is maintained by unwinding the winding wire 2 at the same time as raising the beam 6.

[0007]

When the arm 8 is fixed as shown in FIG. 10, when the arm is inserted into the veranda or the window, the winding wire is wound in cooperation with the undulating operation of the beam. Alternatively, by rewinding, the entire lifting device must be horizontally moved, which requires skill and is not efficient.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention suspends a main body frame at the tip of a winding wire of a crane via a plurality of suspension wire ropes. The main body frame is provided with an arm for suspending an object to be suspended which extends forward and backward substantially horizontally, and is equipped with a drive device for driving the arm forward and backward.

According to the second aspect of the present invention, in order to effectively prevent the arm from swinging during horizontal movement work, in the first aspect of the invention, the body frame is provided with a moment in the direction opposite to the arm. It is characterized in that the acting counterweight is provided so as to be movable in the front-rear direction, and is interlocked with the arm so that the counterweight moves in a direction opposite to the moving direction of the arm.

According to a third aspect of the present invention, in order to further stabilize the horizontal posture of the arm during horizontal movement work, in the hoisting device according to the first or second aspect, the tip of the take-up wire is used as the lifting wire rope. Front wire rope connecting the front part of the main body frame and the rear wire rope connecting the front end of the winding wire and the rear end of the main frame,
It is characterized in that the rear wire rope can be adjusted to be expanded and contracted by an expansion and contraction adjusting mechanism such as an electric winch.

[0011]

The operation of bringing the hoisting device suspended from the winding wire of the crane close to the side surface of the building to a predetermined distance is performed by tilting or raising the beam of the crane.

Next, by adjusting the length of the take-up wire, the hoisting device is moved up and down to a predetermined height, and at this position, the arm is advanced to the front so that the object to be hung, for example, the support work. Push the arm into the frame.

The support work is held by the arms by contracting or folding the legs of the support work or slightly raising the arm.

The supporting work is taken out from the veranda by retracting the arm while holding the supporting work.

After taking out, the hoisting device is raised or lowered to another floor, for example, by adjusting the winding wire, and the arm is moved forward and backward to carry it into the veranda in the reverse order of the taking-out order.

After taking out, when it is not used, it is put down on the ground or a carrier.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a state in which a lifting device 15 to which the present invention is applied is mounted on a crane 1.
A load cell 3 having a load meter is attached to the end of the winding wire 2, and the front and rear wire ropes 20,
The main body frame 22 is hung in a substantially horizontal posture via the rear wire rope 21 and the rear wire rope 21 is equipped with an electric winch 25 and is longer than the front wire rope 20. The slope of the hypotenuse is gentle, and the front slope is a triangle that is close to a right angle.

One pair of left and right wire ropes 20 and 21 are provided, and each wire rope is stretched in an isosceles triangular shape when viewed from the rear as shown in FIG.

A pair of left and right arm guides 26 and a pair of left and right guide rails 29 are fixed to the main body frame 22 formed in a rectangular box shape. A pair of arms 27 is supported, and a counterweight 28, which is elongated in the left-right direction and extends over the entire width of the main body frame 22, is supported on the guide rail 29 so as to be movable back and forth.

In FIG. 3 showing a plan view, an electric motor 17 for driving an arm 27 and a counterweight 28 is mounted at the center of the width of the rear portion of the main body frame 22, and a generator 18 is provided on both the left and right sides thereof. And a control panel 19 are mounted. The left and right arms 27 have cross members 23 and 2 respectively at the rear end and the rear side of the middle part of the front and rear width.
4. Further, the body frame 22 is provided with an inclination sensor 33, which detects the inclination of the body frame 22 in the front-rear direction and the left-right direction.

In FIG. 2 showing a side view, the arm guide 26 projects forward from the front end edge of the main body frame 22 by a predetermined protrusion amount D. The protrusion amount D is, for example, a support T as a suspended object. It is long enough to support.

The arm 27 has substantially the same length as the arm guide 26, and is supported by the arm guide 26 so as to be movable in the front-rear direction via a plurality of support rollers 30 provided on both left and right side surfaces, and is shown by a solid line. From the retracted position where the front end edge is substantially aligned with the front end edge of the arm guide 26 as shown in FIG. 5, the protrusion amount D2 is at least a protrusion amount D2 capable of holding the support work as shown by the phantom line, or a protrusion amount D3 that penetrates the support work T by more than that amount. It is possible to move back and forth horizontally up to the position.

In the vicinity of the tip of the arm guide 26, the stopper 3 that locks the frontmost support roller 30 when the arm 27 reaches the protrusion amount D2 (or the protrusion amount D3).
1 is provided. An anti-slip hook 55 for gripping and locking the lateral pipe 32 at the upper front end of the support T is provided at the tip of the arm 27 so that it can be opened and closed.

The counterweight 28 is formed by stacking a plurality of rectangular iron plates, and the weight thereof can be set to a predetermined weight by adjusting the number of iron plates.

FIG. 5 is an enlarged view of the VV section of FIG.
The arm guide 26 is formed in a U-shaped cross section, and a support roller 30 rotatably supported by an arm 27 is inserted into the U-shaped section and is rotatably mounted.

FIG. 6 shows a support portion of the counterweight 28. The weight support roller 34 is inserted and supported in the rail portion having a U-shaped cross section, and the side guide portion 3 is provided.
5, the lateral guide wheel 36 is supported by abutting.

FIG. 8 shows the arm 27 and the counterweight 2.
8 shows a drive mechanism for moving 8 and 8 in opposite directions. Ball screws 40 and 41 are arranged in parallel to the arm guide 26 and the arm guide 29, respectively, and these are rotatably supported by the main body frame 22 via lateral members 38 and 39, respectively. To the moving nuts 42 and 43 screwed to the connecting members 45 and 46.
The arm 27 and the counterweight 28 are connected via.

The drive gear 48 fixed to the rear end portion of the arm ball screw 40 is directly meshed with the output gear 52 of the drive electric motor 17, while being fixed to the rear end portion of the counterweight ball screw 41. The drive gear 49 is
It meshes with the output gear 52 via the reversing gear 50,
Both ball screws 40 and 41 rotate in opposite directions.

Further, by making the screw pitch of the ball screw 41 for the counterweight 28 smaller than that of the ball screw 41 for the arm, the feeding speed of the counterweight 28 is slowed down, and when the arm 27 is fully advanced, the counterweight is advanced. 28 is located at the rearmost position.
With respect to the weight balance between the front and rear of the entire lifting device by the counterweight 28, in the state where the load of the target suspended object is applied to the arm 27, the counterclockwise moment is always large regardless of the forward / backward position of the arm 27. The counterclockwise moment is supported by the tension of the rear wire rope.
Therefore, the actual adjustment of the horizontal posture is performed by the expansion and contraction adjustment of the rear wire rope 21.

FIG. 7 shows a non-slip hook 5 at the front end of the arm.
5 is a detailed view of FIG. 5, in which a hook 55 is formed in an arc shape and one end of which is rotatably supported by a support shaft 56, which is interlocked with a small motor 59 via a fan gear 58 and a worm 57. As shown by the phantom line, it rotates from the unlocked position to the locked position as shown by the solid line to grab and lock the lateral pipe 32 of the supporting work.

The tilt sensor 33 and the left and right electric winches 25 shown in FIG. 4 are connected to the control panel 19, and when the tilt sensor 33 detects a tilt in the front-rear direction or the left-right direction, the electric winch 25 is driven to make a horizontal posture. To control. The electric motor 17 and the small motor 59 for driving the hook are connected to the control panel 19 while the generator 18 is used as a main power source, and can be driven arbitrarily by a remote operation of a wireless type or a wired type.

Further, as shown in FIG. 4, the body frame 22 has an over-tilt warning lamp 60 and an overload warning lamp 61.
Are provided and are connected to the tilt sensor 33 and the load cell in the load cell 12, respectively, and the respective warning lamps 60 and 61 are turned on in the case of excessive tilt or overload.

The operation of the embodiment will be described. The operation of bringing the hoisting device 15 suspended from the winding wire 2 of the crane 1 of FIG.
This is done by laying down or raising the beam 6 of the crane 1.

Next, by adjusting the length of the take-up wire 2, the hoisting device 15 is moved up and down to a predetermined height, and at this position, the arm 27 is advanced horizontally forward to support the support T of the veranda. The arm 27 is thrust into the frame of the. The forward / backward tilting posture of the arm 27 tends to become unstable due to the advancing operation of the arm 27, but in response to this, the counterweight 28 retracts, so that the instability such as the swing of the arm 27 is eliminated and the arm 27 smoothly. The arm 27 can be horizontally moved and inserted into the support T.

The support T is held by the arm 27 by contracting or folding the legs of the support T or by slightly raising the arm 27. At this time,
Due to the load of the supporting work T, the entire lifting device 15 has the beam 6
The posture changes slightly to the front with the apex portion P of the swing center as the swing center, but the electric winch 25 is activated by the detection of the tilt sensor 33 and the rear wire rope 21 is extended, so that the rear of the lifting device 15 is increased. Lower the edge to maintain a horizontal position.

By moving the arm 27 backward while holding the support T, the support T is taken out from the veranda or the like. At this time, the counterweight 28 returns to the front.

After taking out, the hoisting device 15 is raised or lowered to another floor by adjusting the take-up wire, for example, and the arm 27 is moved back and forth to carry it into the veranda or the window in the reverse order of the taking-out order.

After taking out, when it is not used, it is put down on the ground or a carrier.

FIG. 9 is a balance diagram. Assuming that the center of gravity of the entire arm when retracted (stored) is G1, the counterclockwise moment is the weight W1 of the main body frame (including the motor) 22 and the counterweight. 28 weight Wc
As a clockwise moment, the weight W2 of the protruding portions of the arm guide 26 and the arm 27 is applied. Here, the counterweight weight Wc is W
It is significantly larger than 2, and the counterclockwise moment is about 10 times as large as the clockwise moment.
The difference between the moments is supported by the tension of the rear wire rope 21.

Further, when the arm 27 is advanced to the maximum extent, the counterweight 28 is retracted to the maximum extent, and the clockwise moment due to the load W3 of the protruding portion of the arm 27 and the arm guide 26 is increased. The counterclockwise moment also increases due to the movement of the counterweight 28, and the difference is always about 7 to 8 times.

When the supporting work T is supported by the arm 27 in the extended state, the clockwise moment is smaller than the counterclockwise moment but approaches a close value. Therefore, as shown by the phantom line, the apex portion of the beam 6 is reached. Slightly tilts upward and backward about P by an angle θ. At this time, by extending the rear wire rope 21 by the electric winch 25, the entire lifting device 15 is returned to the horizontal posture.

[Other Embodiments] (1) As a drive device for interlocking movement of the arm and the counterweight in mutually opposite directions, various types such as a chain drive type can be applied in addition to the ball screw type.

[0043]

As described above, according to the present invention, (1) in the hoisting device of the type that is hung by a crane, the arm 27 that locks the object to be suspended is driven forward and backward with respect to the main body frame 22. Since it is freely configured,
With the lifting device positioned at a given distance and a given height to the side of the building, the arm can be inserted horizontally into the balcony or window without manipulating the beam or take-up wire of the crane itself. Therefore, the work of holding the object to be hung on the balcony or the window with the arm can be performed efficiently and accurately.

(2) According to the second aspect of the invention, since the counterweight 28 is constructed so as to move in the opposite direction in conjunction with the forward / backward movement of the arm 27, the forward / backward movement of the arm 27 is performed. At this time, the arm 27 can be prevented from swinging up and down, and the work of advancing and retracting the arm can be stably performed.

(3) According to the invention of claim 3, the rear wire rope 21 for supporting the rear end of the body frame 22 is
Because it is adjustable to expand and contract by the electric winch 25,
When the suspended object is locked or released, or when the arm 27 is advanced or retracted, the horizontal posture can be always maintained, and the lifting work and the transfer work by the lifting device can be performed more stably.

[Brief description of drawings]

FIG. 1 is a side view showing a state in which a lifting device to which the present invention is applied is mounted on a crane.

FIG. 2 is a side view of the lifting device.

FIG. 3 is a plan view of the lifting device.

4 is a sectional view taken along line IV-IV in FIG.

5 is an enlarged view taken along line VV of FIG.

6 is an enlarged cross-sectional view taken along line VI-VI of FIG.

FIG. 7 is an enlarged side view of the tip of the arm.

FIG. 8 is a schematic diagram of a drive device.

FIG. 9 is an explanatory diagram of balance.

FIG. 10 is an overall side view of a conventional example.

[Explanation of symbols]

1 Crane 2 Winding Wire 20, 21 Wire Rope 22 Body Frame 25 Electric Winch (Expansion / contraction mechanism) 26 Arm Guide 27 Arm 28 Counterweight 29 Guide Rails 17, 40, 41 Electric Motor, Ball Screw (Drive Device)

Claims (3)

[Claims] 1. A main body frame is hung from a tip of a winding wire of a crane via a plurality of wire ropes for hanging,
The main body frame is provided with an arm for suspending an object to be lifted which extends forward and backward substantially horizontally, and a drive device for driving the arm forward and backward is mounted. . 2. A body frame is provided with a counterweight, which is movable in a front-rear direction, in which a moment acts in a direction opposite to that of the arm. The hoisting device according to claim 1, wherein the hoisting device is provided. 3. A lifting wire rope, a front wire rope connecting a front end portion of a winding wire and a front end portion of a main body frame, and a rear wire rope connecting a front end portion of a winding wire and a rear end portion of a main body frame. The lifting device according to claim 1 or 2, wherein the rear wire rope can be adjusted for expansion and contraction by means of an expansion and contraction adjusting mechanism.