JPH07277670A - Drawing-out device of long size material such as billet - Google Patents

Abstract

PURPOSE:To draw out plural long size materials rapidly simultaneously, by connecting restricting claws to hit to the peripheral surface of the long size material, to clamp arms respectively through spherical bearings, in the posture to cross their axes to the long size material, and engraving V-shaped grooves the peripheral surface of the long size material is fitted, to the restricting claws. CONSTITUTION:A clamp unit 5 which can grasp the upper end of a long size material is provided, and the clamp unit 5 has a pair of clamp arms 7 which can open and close into a posture to hold the peripheral surface of the long size material. To each clamp arm 7, restricting claws 9 to hit to the peripheral surface of the long size material are connected through spherical bearings 8 whose axes are crossed to the long size material, and about V-shaped grooves 9a and 9b to which the peripheral surface of the long size material is fitted are engraved to each resricting claw 9. Consequently, plural long size materials can be drawn out rapidly simultaneously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoisting device for simultaneously hoisting and transporting a large number of long materials such as cast billets in an aluminum foundry, and particularly to billet having different outer diameters. The present invention relates to a configuration capable of transporting.

[0002]

2. Description of the Related Art Conventionally, Japanese Unexamined Patent Publication No. 2-225291 discloses a lifting device for simultaneously lifting and transporting a plurality of casting billets which are cast in an inverted state in an aluminum casting factory and arranged in the same posture. There is something.

In this lifting device, a pair of pawl mechanisms are attached to the base end of a drive lever at a number of casting billet positions arranged in series in an inverted state on a horizontal suspension beam, and the operation of the drive lever causes the billet to move. The top end is gripped.

[0004]

However, the lifting tool unit used in the device for lifting a long billet has the following problems.
Since a special lifting tool corresponding to the specific diameter of the cast billet is used, it is necessary to replace the lifting tool unit if the diameter of the billet changes. Therefore, when the outer diameter of the billet to be processed changes, the lifting tool unit must be replaced each time, and this has a large effect on work efficiency.

Further, the allowable absorption allowance corresponding to bending, tilting, and height fluctuation of the billet is small, and an alignment operation is required to securely grasp the tip portion of the billet with the lifting tool before lifting work, and thus the casting billet. Processing efficiency is reduced.

Further, when a plurality of billets to be hoisted are arranged and stocked, when a plurality of billets included in one row are hoisted at the same time, work cannot be performed unless the outer diameters of the billets are the same. That is, it is not possible to simultaneously handle a plurality of billets having different diameter sizes.

An object to be solved in the present invention is to enable a plurality of long members to be simultaneously and quickly hung and operated even if the outer diameters of the long members such as billets are not uniform.

[0008]

SUMMARY OF THE INVENTION The present invention is a hoisting device for hoisting and transporting a long material in which at least the upper end portion has a circular cross section and arranged in a vertical orientation.
To a suspension head that can be raised and lowered toward the upper end side of the long material,
A clamp unit capable of gripping the upper end of the long member, the clamp unit having a pair of clamp arms capable of opening and closing in a posture of sandwiching the peripheral surface of the long member;
A restraining claw that abuts the circumferential surface of the long material is connected to each of these clamp arms via a spherical bearing whose posture intersects the long axis of the long material. It is characterized by carving a substantially V-shaped groove into which the surface is fitted.

The restraining claw may be provided with two substantially V-shaped grooves which are orthogonal to each other.

A plurality of clamp units may be arranged and provided on the suspension head.

[0011]

By providing the clamp arm that opens and closes so as to sandwich the long material with the restraining claw provided with the spherical bearing, the inclination of the axis line of the spherical bearing changes according to the outer diameter of the long material. Regardless of the posture of the clamp arm, the restraining claw maintains the positional relationship that fits the circumferential surface of the long material. As a result, it becomes possible to handle long materials of various sizes regardless of the outer diameter of the long material.

Further, since the restraining claw is connected to the clamp arm by the spherical bearing, the lower end of the long member is combined by combining the movements of the traveling of the crane and the lowering of the hoisting head when transferring to a horizontal table, for example. You can lay it down by pushing it against the table. In this case, if the grooves are formed as two rows that are orthogonal to each other, the groove of one row that has held the long material rotates 90 °, and the groove of the other row shifts to the vertical posture. Therefore, at the next lifting,
The long material can be constrained by utilizing the groove in the vertical posture, and the drive mechanism for rotating the constraining claw is unnecessary.

Further, if a plurality of clamp heads are arranged,
It is possible to suspend long materials having different outer diameters at the same time.

[0014]

EXAMPLE An example in which the present invention is used for lifting and conveying an aluminum casting billet will be described.

FIG. 1 is a front view showing an example in which the hoisting device of the present invention is installed in a billet stockyard, and FIG. 2 is a right side view of an essential part.

In the figure, the billet 50 after casting is stored in a container (not shown) so that four billets 50 are made into one unit and the upper end of the billet 50 is slightly above the floor level and the axis is in a vertical posture. Has been done.

A traveling crane 1 is arranged in a direction that is movable over the entire storage area in which a large number of containers are arranged and that is orthogonal to the arrangement direction of the four billets 50. The traveling crane 1 is orthogonal to the traveling direction. Trolley 2 that can be moved in any direction
To provide. The operation of these crane 1 and trolley 2 is
After the billet 50 is lifted from the container, it is controlled so that the billet 50 can be sequentially transferred to a carry-out conveyor (not shown) arranged outside the stockyard.

The trolley 2 is provided with an elevating frame 3 utilizing a telescopic mechanism in a vertical posture. The lifting frame 3 has a winch 3b provided on the frame member 3a at the upper end thereof, and is connected by a chain 3d between the winch 3b and the frame member 3c at the lower end, and is vertically expanded and contracted by the operation of the winch 3b. It is possible to operate. Further, the frame member 3c at the lower end is provided with a base block 3e for connecting the wire rope 3d.

The base block 3e is provided with a suspension head 4 which constrains and suspends a total of eight billets 50 of two adjacent units in two rows so as to be rotatable around a vertical axis. The suspension head 4 is provided with a frame 4a connected to an output shaft of a motor 3f mounted on the base block 3e in a horizontal posture, and the frame 4a can be turned around its center position by the operation of the motor 3f.

The frame 4a is provided with four clamp units 5 arranged side by side. FIG. 3 shows an enlarged front view of the clamp unit 5, and FIG. 4 shows a right side view thereof.

The clamp unit 5 is formed by connecting a bifurcated clamp arm 7 to the lower end of a rod 6a of a double rod type cylinder 6 via a connecting rod 7a. The clamp arm 7 has an intermediate portion rotatably supported by the frame 4a by a pin 7b, and has a rod 6a.
When the rod 6a rises, the pair of clamp arms 7 closes as shown in the example on the right side of FIG. 3, and the clamp arm 7 opens as shown in the example on the left side.

Restraining claws 9 are incorporated into the lower ends of the paired clamp arms 7 via spherical bearings 8.
The spherical bearing 8 is a general one used as a mechanical element, and is capable of moving the rotational axis thereof three-dimensionally in accordance with the load.

Since the outer periphery of the restraining pawl 9 is held by the spherical bearing 8 and is connected to the clamp arm 7, the rotation axis can be changed integrally with the spherical bearing 8, and the restraining pawl 9 itself can be changed. Rotate around the axis.

The restraining claw 9 has a restraining surface shape as shown in FIG. 6 so that the billet 50 can be stably restrained and held even if the outer diameter of the billet 50 changes. That is, the surface of the constraining claw 9 that faces the peripheral surface of the billet 50 has V-shaped grooves 9a and 9b that intersect in a cross shape through the center thereof.
It has a running shape. And these grooves 9a, 9b
Engaging surfaces 9c and 9d, which are carved in the shape of concavo-convex teeth, are formed on the inclined ridges on both sides that form the groove, in order to promote bite into the billet 50.

Further, the clamp unit 5 is provided with a lock device 10 for locking and holding the rod 6a in preparation for the hydraulic pressure of the cylinder 6 being lowered. In this locking device 10, for example, a rod 6a is inserted into a housing that communicates with a hydraulic oil supply system of a cylinder 6, and the housing 1
When the hydraulic pressure supply of the hydraulic oil to 0a disappears, a plurality of cone-shaped collets built in the housing and coaxially arranged around the rod 6a are taper-engaged with the housing to reduce the inner diameter of the collet. It is possible to employ a mechanism in which the rod 6a is restrained by the inner peripheral surface and can be locked.

By providing the lock device 10 as described above, when the billet 50 is pulled up or conveyed by the clamp arm 7, even if the hydraulic pressure of the cylinder 6 is lowered, the rod 6a thereof is locked and does not move in the axial direction. Regulated. Therefore, the holding force of the restraining claws 9 that applies the restraining force to the peripheral surface of the billet 50 via the clamp arm 7 does not loosen, and the billet 50 is prevented from falling off.

In the above-mentioned structure, the operation of suspending and carrying out the billet 50 from the stockyard shown in FIG. 1 is as follows.

First, the position of the container accommodating the billet 50 is designated, and the hanging head 4 is stopped immediately above the designated container by traveling and positioning of the crane 1 and the trolley 2. At this time, it is preferable that the elevating frame 3 is moved in a pulled-up state, as indicated by the alternate long and short dash line in FIG.

Until the suspension head 4 is set to the position corresponding to the row of billets 50 to be collected, the rod 6a of the cylinder 6 of each clamp unit 5 is lifted by the maximum amount as shown in the example on the left side of FIG. The opening of the clamp arm 7 forming a pair is set to the maximum.

The maximum opening of the clamp arm 7 is set so that the restraining pawl 9 can be extrapolated on its peripheral surface with respect to the maximum outer diameter of the billet 50 stored in the stockyard. As a result, all of the stocked billets 50 can be gripped by the restraining claws 9.

Then, the winch 3b of the elevating frame 3 is actuated to lower the frame member 3c at the lower end as shown by the solid line in FIG. Then, as shown in FIG. 3, the descent is stopped at a position where the clamp arm 5 of the clamp unit 5 is inserted a little below the upper end of the billet 50. Then, the cylinder 6 is operated and the rod 6
When a is lowered, the opening degree of the clamp arm 7 forming a pair is narrowed, and the restraining claw 9 comes into contact with the peripheral surface of the billet 50 to restrain the billet 50.

Here, at the time of starting the lifting work, as shown in FIG. 6A, the posture of the restraining claw 9 is such that one groove 9a is in the vertical direction. This can be easily performed at the time of initial setting because the constraining claw 9 rotates by the spherical bearing 8.

With the posture of the restraining claw 9 as described above, when the clamp unit 5 descends, the billet 50 is positioned so as to fit into the groove 9a as shown in FIG. Therefore, the tightening force by the cylinder 6 is
The engaging surface 9c formed on the inclined ridge of the groove 9a acts so as to bite into the peripheral surface of the billet 50, and the billet 50 is moved to the groove 9a.
It is stably restrained and held in a.

When the billet 50 is held by the restraining claws 9, since the restraining claws 9 are connected to the clamp arm 7 by the spherical bearings 8, the billet 50 has a small outer diameter as shown in the example on the right side of FIG. In case of clamp arm 7
Even if is tilted inward, the restraining claw 9 can be restrained by the groove 9a with its axis lined in the horizontal direction. Therefore, regardless of the outer diameter of the billet 50, stable grasping by the restraining claw 9 is possible.

After the billet 50 is held by the restraining claws 9 as described above, the lifting frame 3 is raised by the operation of the winch 3b, as shown by the alternate long and short dash line in FIG.
The billet 50 is pulled up from the container. Then, as the trolley 2 and the crane 1 travel, the collected eight billets 50 are carried out to the transfer destination.

The transfer destination may be, for example, the table 51 shown in FIG. 2 outside the stockyard in the direction orthogonal to the drawing in FIG. And the table 5 is moved by the traveling of the crane 1.
After the hoisting head 4 reaches the top of the crane 1, the crane 1 is further moved and at the same time the lifting frame 3 is lowered. By this lowering, the lower end of the billet 50 rests on the table 51, and then the billet 50 is tilted in the direction of the arrow shown by the alternate long and short dash line in FIG.

When the billet 50 is tilted in this manner, the clamp arm 7 maintains the vertical posture as shown in FIG. 4, while the billet 50 gradually inclines.
Such a change in the posture of the billet 50 is possible by rotating the restraining claw 9 around its core since the billet 50 is connected to the clamp arm 7 by the spherical bearing 8. Then, the relationship between the moving speed of the corresponding crane 1 to the right in FIG. 2 and the descending speed of the dawn frame 3 is
If the constraint points by the constraint claws 9 are set so as to draw a circle whose radius is the distance from the lower end of the billet 50 to this constraint point, each billet 50 can be quickly moved to the table 5.
1 can be transferred.

When the billet 51 is placed on the table 51, the billet 51 has changed from its vertical posture to a horizontal posture. Therefore, the restraining claw 9 holding the billet 51 also rotates 90 ° integrally with the restraining claw 9 as shown in FIG.
The groove 9b indicated by takes a vertical posture. And
When the rod 6a of the cylinder 6 is raised, the clamp arm 7 is opened and the holding of the billet 50 by the restraining claw 9 is released, and the clamp unit 5 is raised together with the elevating frame 3 for the next collection.

When the billet 50 is hung up for the second time, the groove 9b of the restraining claw 9 is in the vertical posture as described above. Therefore, by lowering the suspension head 4 at the recovery position, the billet 50 can be suspended as in the previous example. After the billet 50 is transferred to the table 51, the restraining claws 9 rotate 90 ° here as well,
The groove 9a comes to have a vertical posture, and the next billet 50
To prepare for the recovery.

In this way, when a plurality of billets 50 are suspended at one time, even if the outer diameters of the billets 50 differ within a certain range, the suspension can be carried by the suspension head 4. For this reason, 5 billets are randomly placed in the stockyard.
Even if the equipment is used to store 0, it is possible to carry out a plurality of lifting and collecting operations.

Further, since the billet 50 is hung and conveyed and handled without requiring any driving system for rotating the restraining claw 9, the structure of the hanging head 4 can be simplified and its weight can be reduced.

Although the billet recovery has been described in the embodiment, it is needless to say that the present invention can be applied to various cylindrical long material products instead.

[0043]

The present invention has the following effects.

(1) Even if the outer diameter of the long material changes,
Since the work can be performed without replacing the members of the hanging tool, the processing efficiency is improved.

(2) Since a plurality of long materials having different outer diameters can be lifted at the same time, it is possible to cope with a large number of long materials without any trouble.

[Brief description of drawings]

FIG. 1 is a front view of a main part showing an example in which the lifting device of the present invention is applied to an aluminum billet recovery facility.

FIG. 2 is a right side view of FIG. 1 when a lifting frame is raised.

FIG. 3 is a front view showing a billet clamped by a clamp unit provided in the suspension head.

4 is a right side view of the left clamp unit in FIG. 3. FIG.

5 is a cross-sectional view taken along the line AA of FIG.

6A and 6B are details of the restraining claws, where FIG. 6A is a front view seen from the side of the billet restraining surface, FIG. 6B is a plan view of FIG. FIG. 7C is a right side view of FIG.

[Explanation of symbols]

1 Crane 10 Lock Device 2 Trolley 50 Billet 3 Lifting Frame 51 Table 4 Lifting Head 5 Clamp Unit 6 Cylinder 6a Rod 7 Clamp Arm 8 Spherical Bearing 9 Restraining Claw 9a Groove 9b Groove

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B66C 1/44 P 9147-3F

Claims (3)

[Claims] 1. A hoisting device for hoisting and transporting a long material in which at least the upper end portion has a circular cross section and arranged in a vertical orientation, and the hoisting device is capable of moving up and down toward the upper end side of the long material. The hanging head is provided with a clamp unit capable of gripping the upper end of the long member, and the clamp unit comprises:
A pair of clamp arms that can be opened and closed so as to sandwich the peripheral surface of the long material is provided, and a restraining claw that abuts on the peripheral surface of the long material is provided in each of the clamp arms, and the axis of the clamp arm is the long material. A device for suspending a long material such as a billet, which is connected through spherical bearings in an intersecting posture, and in which the constraining claw is formed with a substantially V-shaped groove into which the peripheral surface of the long material is fitted. 2. The hoisting device for a long material such as a billet according to claim 1, wherein the restraining claw includes two substantially V-shaped grooves that are orthogonal to each other. 3. The device for suspending a long material such as a billet according to claim 1, wherein a plurality of clamp units are arranged in the suspension head.