JP3247794B2 - Equipment for lifting long materials such as billets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting apparatus for simultaneously lifting and transporting a large number of long members such as cast billets in an aluminum foundry, and more particularly to billets having different outer diameters and irregular postures. The present invention relates to a configuration in which billets can be transported.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 2-225291 discloses a lifting apparatus for simultaneously lifting and transporting a plurality of cast 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 claw mechanisms are mounted on a base end of a drive lever at a plurality of cast billet positions arranged in series on a horizontal suspension beam in an inverted state, and the billet is moved by the operation of the drive lever. It grips the top end.

[0004]

However, the hanging unit used in the long billet lifting device is as follows.
Since a dedicated hanging tool corresponding to the specific diameter of the cast billet is used, if the billet diameter changes, the hanging tool unit needs to be replaced. For this reason, whenever the outside diameter of the billet to be processed changes, the hanging unit must be replaced each time, and the effect on work efficiency is great.

In addition, the allowable absorption allowance corresponding to the bending, falling, and height fluctuation of the billet is small, and it is necessary to perform an aligning operation for securely gripping the leading end portion of the billet by a hanging tool before lifting work. Processing efficiency.

Further, when a plurality of billets included in one row are lifted at the same time with respect to a stock in which billets to be lifted are arranged and stocked, work cannot be performed unless the outer diameters of the billets are the same. That is, a plurality of billets having different diameters cannot be handled at the same time.

The problem to be solved in the present invention is that even if there is a slight error in the outer diameter of a long material such as a billet, a plurality of long materials in a posture slightly inclined from a vertical posture can be quickly and simultaneously lifted. To be able to do it.

[0008]

SUMMARY OF THE INVENTION The present invention is a lifting device for lifting and transporting a long material such as a billet arranged in a substantially vertical posture, wherein the lifting device moves up and down toward the upper end of the long material. A possible suspension head includes a clamper capable of gripping an upper end of the long material, the clamper includes a pair of clamp arms that can be opened and closed in a posture of sandwiching the periphery of the long material, and each of these clamp arms is provided. the was allowed modeled after toward the upper end portion of the long material inside the clamp arm
Two blocks with a semi-circular cross section
And the inner peripheral surface of the block has a lower end
Equipped with a guide block that forms a wide taper surface
And a connecting shaft for connecting the guide block.
Provided at the lower end of the clamp arm, and on the outer peripheral surface of the coupling shaft
Form an engagement groove, while the guide block has
Form a connecting hole for inserting the connecting shaft, and
The head has an engagement head at its tip, and has a predetermined spring force.
The operating head, which is biased, is rotatably provided, and the engaging head is
The guide block so that it can fit freely into the engagement groove.
Has a detachable device that is connected and fixed to the lamp arm
Characterized in that that.

The guide block may have a substantially semi-circular cross-sectional shape, and may have a tapered surface whose opening cross-section decreases from the lower end facing the upper end of the long material toward the upper end.

[0010]

[Function] By providing a guide block in a clamp arm which opens and closes so as to sandwich the long material so that the long material can be inserted into these clamp arms by copying, the long material is slightly inclined from the vertical posture. Even if it is stored, a long material quickly enters the clamp arm side as the suspension head descends, and even if the long material is not uniform, a plurality of long materials can be handled at the same time.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is used for lifting and transferring an aluminum cast billet will be described.

FIG. 1 is a perspective view showing an outline of an example in which the lifting device of the present invention is installed in a billet stock yard.

In the drawing, billets 50 after casting are respectively housed in containers 51 such that a plurality of billets 50 are arranged in a plurality of rows so that the axes are in a vertical posture.

The traveling crane 1 is arranged in a direction perpendicular to the direction in which the billets 50 are arranged so as to be movable over the entire storage area in which a number of containers are arranged, and the traveling crane 1 is mounted on the traveling crane 1 in a direction perpendicular to the traveling direction. A movable trolley 2 is provided. The operations of the crane 1 and the trolley 2 are controlled so that the billet 50 is lifted from the container and then transferred sequentially to a carry-out conveyor (not shown) arranged outside the stock yard.

Guide frames 3 are provided at both ends of the trolley 2 in a vertical posture, and a suspension head 4 is provided which is supported by both ends of the guide frames 3 and moves up and down. The suspension head 4 is connected via a winch 2a mounted on the trolley 2 and a wire rope 2b driven by the winch 2a. FIG. 2 shows a front view of a main part thereof, and FIG. 3 shows a side view thereof. .

The suspension head 4 includes an elevating frame 4a connected to the guide frame 3 so as to be able to move up and down. Three rotating shafts 4b, 4c and 4d are arranged at the lower end of the elevating frame 4a so as to be rotatable coaxially. And these rotating shafts 4b
4 to 4c are provided with 5 to 6 clampers 5 respectively.

FIG. 4 is an enlarged front view of a main part showing the clamper 5, FIG. 5 is an enlarged left side view of the clamper 5, and FIG. 6 is a bottom view of the clamper 5 shown in FIG.

The rotating shaft 4b rotatably supported by the elevating frame 4a (the other rotating shafts 4c and 4d are exactly the same) as shown in FIG. As shown in FIG. 12, the rod 6a of the setting cylinder 6 holds the rod 6a in a state where the clamper 5 is horizontal.
The horizontal posture can be maintained by pressing the seating surface 4e with a. When the clamper 5 is opened in this horizontal posture and shifted to the left, the clamper 5 can be removed from the billet 50.

As shown in FIG. 5, two pairs of clamp arms 7 are arranged on the rotating shaft 4b at intervals in the axial direction of the rotating shaft 4b as shown in FIG. These clamp arms 7 are rotatably connected to a rotating shaft 4b in a vertical plane by pins 7a, and a roller 7b is rotatably attached to an upper end thereof. Inside the lower end of the clamp arm 7, a restraining pin 7c for holding the peripheral surface of the billet 50 is provided by biasing toward the center of the billet 50 by a spring 7d.

Further, as shown in FIG. 7, an opening / closing cylinder 8 is fixed to the rotation shaft of the intermediate portion of the set of the clamp arms 7. Then, the operating shaft 8b is attached to the rotating shaft 4b in a posture parallel to the axis of the rotating shaft 4b, and the opening / closing cylinder 8
Rod 8a is connected to the operation shaft 8b. Operation shaft 8b
5, a substantially elliptical cam 8c is provided, and the peripheral surface of the cam 8c is
b.

When the operating shaft 8b is rotated by operating the opening / closing cylinder 8 by the arrangement of the roller 7b and the cam 8c, the lower end side of the clamp arm 7 becomes closer to the billet 50 as the long axis of the cam 8c approaches the horizontal position. , And moves away from the peripheral surface of the billet 50 as the position becomes vertical. Therefore, such an operation of the clamp arms 7 makes it possible to extrapolate to the billet 50 when they are open, and to restrict the movement by the subsequent movement in the closing direction.

A guide block 9 is provided at the lower end of each of the two clamp arms 7 so as to be quickly inserted into the clamp arm 7 when the suspension head 4 descends and receives the billet 50.

As shown in FIG. 6, these guide blocks 9 have a semicircular planar shape, and when the two guide blocks 9 are closest to each other, an opening with a circular internal cross section is created. It is a shape. And
The inner peripheral surface of the guide block 9 forms a tapered surface 9a having a wider lower end side, as is apparent from FIG. 5, for example, and when the two guide blocks 9 are aligned, a cone-shaped cross section having a larger open area at the lower end portion is formed. To form

Even if the outside diameter of the billet 50 to be handled is variously changed, the different diameter billet 50 can be lifted and the inclined billet 50 can be lifted by changing only the guide block 9 without replacing the entire suspension head 4. Enable application. For this reason, the guide block 9 is prepared as a facility in which various diameters of the inner peripheral surface are prepared in advance, and these are stocked near the yard and can be replaced immediately when necessary.

FIG. 8 shows that the guide block 9 is attached to and detached from the attaching / detaching device 1.
FIG. 9 is a front view thereof, and FIG. 10 is a plan view of the attaching / detaching device 10.

A single connecting shaft 7e for connecting the guide block 9 is provided at a lower end of the clamp arm 7, and an outer peripheral surface of the connecting shaft 7e is provided with an engaging groove 7f. On the other hand, a connecting hole 9b into which the coupling shaft 7e is inserted is opened in the guide block 9, and a slit 9c (see FIG. 8) is formed in the connecting hole 9b from both sides of the guide block 9 in the width direction (left-right direction in FIG. 6). Provided.

The operation rod 9 is provided in these slits 9c.
d is pivotally connected up and down and urged downward by a spring 9e. The upper end of the operating rod 9d is
As shown in FIG. 11, the engagement head 9f has a shape that fits into the engagement groove 7f of the coupling shaft 7e. Then, in a normal case, the operating rod 9d takes the posture shown by the solid line in the drawing by the urging force of the spring 9e, and the engaging head 9f is fitted into the engaging groove 7f. Thereby, the guide block 9 is connected and fixed to the clamp arm 7 via the coupling shaft 7e.

As shown in FIG. 8, the attachment / detachment device 10 has a holding base 10b for mounting two guide blocks 9 on a fixed base 10a, and a walking type on the left and right of the base 10a. The lifting beam 10c is provided. The elevating beam 10c is connected to the base 10a by a cylinder 10d and a link rod 10e, and by operating the cylinder 10d, the elevating beam 10c can be moved up and down in a parallel posture with a stroke indicated by a solid line and a dashed line in FIG.

Further, a pusher 10f for pushing up the operation rod 9d of each guide block 9 is provided in conjunction with the operation of the lifting beam 10c. The pusher 10f has a damper function which is connected by a spring having two members coaxially arranged therein. As shown in FIG.
d.

The attachment / detachment of the guide block 9 to / from the clamp arm 7 by the attachment / detachment device 10 is performed in the following manner.

When the guide block 9 is mounted on the clamp arm 7, the elevating beam 10c is raised to the level shown by the one-dot chain line in FIG. 9, and the operating rod 9d is set to the posture shown by the one-dot chain line in the figure. Next, the suspension head 4 is set on the base 10a and lowered, and the coupling shaft 7e of the clamp arm 7 is inserted into the connection hole 9b of the guide block 9 on the base 10a. When the elevating beam 10c is lowered to the position indicated by the solid line in FIG. 9, the level of the pusher 10f is also lowered, so that the operating rod 9d assumes the posture indicated by the solid line in the figure, and the engaging head 9f engages as described in FIG. The guide block 9 is fitted into the groove 7f, whereby the guide block 9 is integrated with the coupling shaft 7e.

After this operation, when the suspension head 4 is raised, the guide block 9 set in the attaching / detaching device 10 is moved.
Can be integrated into the lifting work of the billet 50.

In the above configuration, the operation of lifting the billet 50 from the stock yard shown in FIG. 1 and carrying it out is as follows.

First, the position of the container storing the billet 50 is specified, and the suspension head 4 is stopped immediately above the specified container by the traveling and positioning of the crane 1 and the trolley 2. At this time, it is preferable that the lifting frame 3 be moved in a state of being lifted as shown by a dashed line in FIG. Until the suspension head 4 is set at a position corresponding to the row of billets 50 to be collected, the opening of the clamp arm 7 is set to the maximum.

Next, the suspension head 4 is lowered by operating the winch 2a of the trolley 2, and the billet 50 is moved.
Through the guide block 9 and into the clamp arm 7. At this time, the guide block 9 has a tapered surface 9a at the lower end of the inner peripheral surface thereof, and has an opening shape that expands in the skirt. ing.

With such an open state of the guide block 9, when the suspension head 4 is lowered in the vertical direction, even if the billet 50 in the container 51 is slightly inclined, the upper end of the billet 50 follows the descent of the guide block 9. Is tapered surface 9
Move to imitate a. Since the tapered surface 9a converges in the vertical direction as it goes upward, the inclined billet 50 is corrected in its posture, and the axis is set to the vertical posture. Therefore, when the clamp arm 7 covers the upper end portion of the billet 50, the billet 50 can quickly enter the clamp arm 7 without being caught.

The suspension head 4 is lowered to a predetermined position,
After the upper end of the billet 50 is accommodated in the clamp arm 7, the clamp arm 7 is operated by the opening / closing cylinder 8 in the closing direction. Thereby, the constraining pin 7c of the clamp arm 7 firmly holds the peripheral surface of the billet 50, and the billet 50 is integrally lifted by the lifting of the suspension head 4. Then, the billet 50 collected by the traveling of the trolley 2 and the crane 1 is carried out to the transfer destination.

Further, even in the case where the outer diameter of the billet 50 is largely changed, the guide block 9 corresponding to the size is changed.
Is prepared and the guide block 9 is replaced by the attachment / detachment device 10 in the manner described above, so that the billet 50 can be adapted to various sizes. Therefore, in addition to correcting the inclination of the billet 50 to the vertical posture, if the outer diameter of the billet 50 in the row unit is the same, it is possible to cope with the change in the outer diameter without any problem.

Although the embodiment has been described with respect to billet recovery, it is a matter of course that the present invention can be applied to various cylindrical long material products instead.

[0040]

According to the present invention, even if the posture of the long material is not uniform or its outer diameter changes variously, the long material can be lifted quickly by attaching an appropriate guide block to the clamp arm. Therefore, the processing efficiency is improved, and no unreasonable force is applied between the long member and the suspension head side during the lifting operation, and the long member and the equipment are not damaged.

[Brief description of the drawings]

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

FIG. 2 is a front view of a suspension head portion.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is an enlarged front view of a clamp arm portion.

FIG. 5 is a cutaway view showing a connection structure between a clamp arm and a guide block.

FIG. 6 is a bottom view of FIG.

FIG. 7 is a front view of a main part showing a connection structure between an opening / closing cylinder and an operation shaft.

FIG. 8 is a side view of the attachment / detachment device shown together with the clamp arm and the guide block.

FIG. 9 is a partial front view when the hanging head is set in the attaching / detaching device.

FIG. 10 is a partial plan view of the attaching / detaching device.

FIG. 11 is a view showing the operation of a coupling shaft and an operation rod.

FIG. 12 is a front view of a main part showing a state in which a billet is held in a horizontal posture by turning a clamp arm.

[Explanation of symbols]

 Reference Signs List 1 crane 2 trolley 3 frame 4 suspension head 5 clamper 6 attitude setting cylinder 7 clamp arm 7e coupling shaft 7f engagement groove 8 opening / closing cylinder 9 guide block 9a tapered surface 9b connection hole 9d operation rod 9e spring 9f engagement head 10 attaching / detaching device 10a base 10b holding seat 10c lifting beam 10f pusher

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-41778 (JP, U) JP-A-62-124984 (JP, U) (58) Fields studied (Int. Cl. ⁷ , DB name) B66C 1/00-1/68

Claims (1)

(57) [Claims] 1. A lifting device for lifting and transporting long materials such as billets arranged in a substantially vertical posture, wherein the lifting head is capable of moving up and down toward the upper end side of the long materials. The clamp includes a clamper capable of gripping an upper end of the long material, the clamper includes a pair of clamp arms capable of opening and closing in a posture for sandwiching the periphery of the long material, and each of these clamp arms includes an upper end of the long material. Traverse approximately semi-circular to allow the part to follow the inside of the clamp arm
Formed of two blocks each having a surface shape, and
The inner peripheral surface of the taper has a tapered surface with its lower end wider.
Guide block, and the guide block
The connecting shaft for connecting the clamp to the lower end of the clamp arm.
And an engaging groove is formed on the outer peripheral surface of the coupling shaft.
On the other hand, a connection hole for inserting the coupling shaft is provided in the guide block.
And the guide block is engaged with the tip end.
Operating head having a combined head and biased to a predetermined spring force
Is rotatably provided, and the engagement head is fitted into the engagement groove.
Now the guide block is connected and fixed to the clamp arm
A device for lifting a long material such as a billet having a detachable device as described above .