JPH0891770A - Long member suspending device - Google Patents

Abstract

PURPOSE: To provide an automatic device for the transfer of a long member which can carry out the suspension-up/down work for the member, in a stable manner easily in safe, without generating the load swing etc., by a balance, independently of the length of the suspended load. CONSTITUTION: A long member suspending device consists of a balance 8 suspended in a. rising/lowering enabled form from a crab 2 which is shiftable on a ceiling traveling crane 1, the telescopic first swing stop body 6 which is extensible/contractible and connects the crab 2 and the balance 8, a plurality of hoists 9 which are installed in a shiftable manner in the lengthwise direction on the balance 8, suspending tool 13 which is suspended so as to be raised and lowered, on each of a plurality of hoists 9, and the telescopic second swing stop body which is extensible/contractible so as to connect each of a plurality of hoists 9 and the suspending tool 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, shaped steel, steel bar,
TECHNICAL FIELD The present invention relates to a long material hoisting device for hoisting or lowering long materials such as steel pipes in a factory or a warehouse by using an overhead traveling crane for temporary placement and delivery.

[0002]

2. Description of the Related Art For example, long materials such as shaped steel, steel bar and steel pipe are
In the factory or warehouse, for temporary storage and payout,
For lifting or hanging using an overhead traveling crane, conventionally, a balance is generally hung on a double hook type crane, and the hook and long material of such a crane with a balance are
It is performed by a method of hanging a long material by hanging wires on a plurality of places depending on the length of the long material, or a method of lifting a steel material by adsorbing a steel material by a magnet hung on a balance.

Recently, two frame-shaped tongs each having a pair of arms whose lower ends are connected to each other by a beam are arranged at both ends of the main beam so as to be movable in the length direction, and the frame-shaped tongue is formed. We have also developed an automatic lifting device system that hangs two long tongues by inserting the two tongs from both ends.

[0004]

However, the above-mentioned conventional device has the following problems. (1) In the case of a method in which a long material is hoisted by a crane with a balance by wire hanging, it is necessary to hang the wire at two or more places. The work must be done manually, which requires a couple of workers in addition to the crane operator, which is a lot of work. Moreover, the slinging and unscrewing operations must be performed at a high place above the piled steel materials, which makes the work difficult and dangerous.

(2) Further, since the long material and the balance are suspended by the wire, the load sways as the crane travels, and as a result, it takes a long time to stop the long material at a predetermined position, and the material is conveyed. It is not efficient, and it is necessary to prepare a balance of various lengths according to the length of the long material.

(3) In the case of a method in which a long material is hoisted by a crane with a balance attached to a magnet, a magnet, a power supply, a control device, etc. are required, and the weight of the magnet is large. In order to have a lifting capacity, a crane with a large capacity is required, and as a result, a large amount of equipment cost is required, and it is impossible to integrally lift long materials stacked in a plurality of stages.

(4) In the case of the automatic hoisting system in which two frame-shaped tongs are arranged at both ends of the main beam so as to be movable in the length direction, it is inevitable that the long member is long. Since it is hung at both ends, its own weight causes downward bending in the central part, which is not practical.

Therefore, an object of the present invention is to solve the above-mentioned problems, for example, for lifting or lowering a long material such as shaped steel, steel bar, and steel pipe with one balance regardless of the length of the long material. It can be carried out safely, easily and efficiently in a short time without causing swaying or sagging. Furthermore, by omitting slinging work and using it together with the storage management system, the transportation inside the factory and warehouse is fully automated. Another object of the present invention is to provide a long material lifting device capable of achieving the above.

[0009]

SUMMARY OF THE INVENTION A device of the present invention comprises a club movable on its overhead traveling crane in its longitudinal direction.
A balance hung from the club so that it can be lifted and lowered, an expandable telescopic first steady rest that connects the club and the balance, and a balance movably attached to the balance. A plurality of hoists, a suspender hung up and down on each of the plurality of hoists, and an extendable telescopic second swing that connects each of the plurality of hoists and the suspender. It is characterized by being composed of a stopper.

[0010]

According to the apparatus of the present invention, since a plurality of hoists are movably attached to the balance, a plurality of hoists should be appropriately selected and used according to the length of the long material to be lifted. Therefore, it is possible to hang up long materials of various sizes with one balance, and
Since the crane's club and balance, and the balance and suspension are connected by a telescopic, steady-type body that can be expanded and contracted, the balance and suspension sway when the crane travels and traverses. In addition, rotation, twisting, etc. are prevented, and a long material hung on a suspender can be stably transferred, improving work efficiency and enabling automatic operation.

Further, a suspension position detector attached to each side surface of the plurality of hoists constantly monitors the difference in the suspension position between the plurality of hoists due to the suspension device, and the difference in the suspension positions is within a certain range. Since the hanging height is controlled so that the long material is not slanted. The use of the automatic lifting device can eliminate the need for a slinging operator, and the automation of the crane can be fully automated by using the NC NC, automatic platform, and computerization of loading / unloading / place management.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the device of the present invention will be described with reference to the drawings. 1 is an overall front view showing an embodiment of the apparatus of the present invention, and FIG. 2 is an enlarged side view of FIG. As shown in the drawing, in an overhead traveling double hook crane 1, a club 2 having wheels 3 is provided so as to be movable on a rail 4 provided in the length direction of the crane 1.

The club 2 of the double hook crane 1 includes
A balance 8 parallel or perpendicular to the length direction of the crane 1 locks a suspension pin 7 ′ attached to the upper end of the balance 8 with a hook 7 attached to the lower end of the wire 5 by a plurality of wires 5. Therefore, it can be lifted and lowered.

The club 2 and the balance 8 are connected to each other by an expandable telescopic first steady rest 6 provided at the position where the wire 5 is attached. Therefore, the crane 1
Shaking of the balance 8 that occurs when moving or moving up and down is prevented to a minimum.

As shown in FIG. 1 as a whole front view, in FIG. 3 as a partially enlarged front view of FIG. 1 and in FIG. 4 as a sectional view taken along the line AA of FIG. 3, the balance 8 has a plurality of hoists 9. However, the balance 8 is movably attached so as to maintain a predetermined interval with the center of the balance 8 in the longitudinal direction being symmetrical. The interval between the plurality of hoists 9 is set according to the length of the long member to be lifted or the interval of the table. Wheels 9'provided on the upper part of hoist 9 roll on rails 8'provided on the lower part of balance 8, thereby supporting the load applied to hoist 9 and moving hoist 9.

The hoist 9 is moved as shown in FIG.
This is performed by screwing a threaded shaft 15 attached to the lower surface of the balance 8 in the lengthwise direction into a screw hole provided in the upper portion of the hoist 9 and rotating the threaded shaft 15 by a motor 16. In addition, the moving mechanism of the hoist 9 is
In addition to the shaft type with screw, any mechanism such as chain type, rack and pinion type, roller type, cylinder type may be used. Note that the motor or cylinder of the drive source of any mechanism must be remotely controllable.

On each of the hoists 9, a hanger 13 is attached to the wire 11.
The bracket 13 'attached to the upper end of the hanger 13
Is hooked on the hook 12 attached to the lower end of the wire 11 so that it can be lifted and lowered. The lifting and lowering of the suspension 13 by the hoist 9 is controlled by an inverter or servo so that the suspension height of the suspension 13 can always be detected.

The balance 8 and the suspension 13 are connected by a telescopic second steady rest 10 of a telescopic tube type provided at the mounting position of the wire 11. Therefore, when the suspending tool 13 is moved by the hoist 9 or when the suspending tool 13 is moved up and down by the wire 11, the rotation and shaking of the long material suspended by the suspending tool is prevented to the minimum. Therefore, the club 2 and the balance 8 described above are connected by the expandable telescopic first steady rest 6 so that the shake of the balance 8 caused when the crane 1 is moved or moved up and down is prevented to a minimum. In combination with this, the position of the suspending tool 13 and the long material suspended by this can be stably transferred, and the work efficiency can be improved.

A suspension position detector 14 is attached to the side surface of each of the plurality of hoists 9. Hanging position detector
By 14 the hanging device 13 between the plurality of hoists 9 in use
The difference between the hanging positions due to the hoist 9 is constantly monitored, and when the difference between the hanging positions due to the hanging device 13 exceeds a predetermined value, the lifting and lowering of the hanging device 13 due to the hoist 9 is automatically stopped or corrected.

FIGS. 5 and 6 are explanatory views showing a telescopic state between the club 2 and the balance 8 of the double hook crane 1 and between the hoist 9 attached to the balance 8 and the suspension 13. . FIG. 5 shows a state in which the space between the club 2 and the balance 8 is contracted and the space between the hoist 9 and the suspension 13 is extended, and FIG. 6 is a space between the club 2 and the balance 8. Shows an extension and a contraction between the hoist 9 and the hanger 13 is shown.

FIG. 7 is a front view of an example of the hanging device 13, FIG. 8 is a side view thereof, and FIG. 9 is a plan view thereof. As shown in the drawings, the sling 13 is a pair of frames 1 spaced at predetermined intervals.
Arms 19, 18 whose ends match when closed, are attached to the lower ends of 9, 19 and shafts 19 ′, 19 ′ so as to be horizontally pivotable at an angle of about 90 ° by the operation of an air cylinder 20. It consists of

At the bottom of each of the frames 19, 19, there is a light emission,
A pair of photoelectric sensors 17a, 17b for receiving light are mounted vertically at a predetermined interval. The hanger 13 descends and the frame
Top photoelectric sensor 1 attached to the bottom of each of 19,19
When the 7a and the lower photoelectric sensor 17b are shielded from light by the long material to be lifted, the descending speed of the hanger 13 becomes about 1 / l.
When the lower sensor 17b re-lights, it decelerates to about 1/10, and when the upper sensor 17a re-lights, the hanger 13 stops descending. And
The light passing through both the upper sensor 17a and the lower sensor 17b confirms that there is no interfering object in the swivel region of the arms 18,18.

Next, the operation of the apparatus of the present invention will be described with reference to the schematic state diagram of FIG. 10 for an example in which the operator operates only the crane in the crane cab or on the ground. With the double-hook crane 1 without a load, with the hoist 9 wound up at the top and the height of the balance 8 kept at the top of the storage place so that the hanger 13 does not interfere. It is made to run and stopped above the long member 22 to be lifted which is placed on the stand 21. Such work guidance is instructed to the crane operator by radio or trolley from the ground.

The center of the balance 8 is visually aligned with the center of the long member 22 to be lifted. Next, the predetermined two hoists 9 and 9 are selected according to the length of the long member 22 to be lifted, the intervals between them are adjusted, and then the hoisting tool 13 of the selected hoists 9 and 9 is lowered. As the hanging device 13 descends, photoelectric sensors 17a, 17
By the above-described operation of b, the lifting tool 13 automatically stops at a position suitable for lifting the long material 22.

When the suspension 13 is stopped as described above,
The arms 18 and 18 attached to the lower ends of the shafts 19 ′ and 19 ′ of the hanging device 13 are operated by the air cylinder 20.
The arms 18 and 18 are passed under a long member 22 to be lifted by swiveling horizontally at an angle of about 90 ° to form a closed shape.

It is confirmed by a limit switch (not shown) that the arms 18, 18 have swung to a predetermined position, and
The detector 14 confirms that the difference between the lowered positions of the hoist 9 is within a predetermined range, and the lifting preparation is completed.
Next, the driver simultaneously operates the balance 8 and the hoist 9, hoisting the long material 22 to a predetermined height by the hoisting tool 13, and traveling the crane 1 at that height to place the long material 22 at a predetermined place. To move.

In this way, after the long member 22 is moved to the predetermined position, the balance 8 has a predetermined height (a position where the hoisting device 13 does not interfere with the hoist 9 at the uppermost position of the hoist 9). In the case of being located above, the balance 8 is first lowered to that position, and then the hoist 9 is lowered. When the hoist 9 is descended in this manner, the hanging height of the hoist 9 is detected by the detector 14 attached to the hoist 9 so that the long member 22 is not hung obliquely, and a difference in the hanging height is detected. It is adjusted to be within a predetermined range.

In this way, when the long member 22 is transferred onto the mounting table 21, the lowering of the balance 8 and the hoist 9 is stopped, and the arms 18, 18 of the hanging device 13 are opened by remote control. By confirming the opening of the arms 18 and 18 by the detector, the next long material can be lifted. Next, when the driver gives a lifting instruction, the hoist 9 is automatically raised to the upper limit, and the balance 8 is automatically raised to the lower traveling limit, and the crane 1 moves the next long material 22 to be lifted on the stand 21. Move to position.

According to the present invention, since the plurality of hoists 9 are movably attached to the balance 8 suspended from the double hook crane 1, as shown in FIG. A plurality of hoists 9 can be appropriately selected and used according to the length. Therefore, the long member 22 in the valley can be lifted without being limited by the length of the balance 8, and a balance having various lengths according to the length of the long member 22 is required as in the conventional case. Never.

Further, by adjusting the interval between the plurality of hoists 9 movably provided on the balance 8, a long material can be obtained.
The interval of the hoists 9 can be set at an optimum hanging position according to the length of 22 and the interval of the stand 21.

The above is an example of the case where the operator manually operates the crane, and the work is instructed to the crane operator as guidance. According to the present invention, however, a yard management system is provided, for example. It is possible to achieve completely unattended automation by computerizing the arm rack type automatic placing table, the NC of the crane, the yard management, the warehousing management, and the like.

The hanging device is not limited to the above-mentioned example, and may have any structure. In the simplest example,
Hooks may be used as suspenders. As described above, when the hook is used as the hanging tool, it is necessary to sling the hook of the long material, but it is effective in improving the work efficiency and the storage efficiency.

[0033]

As described above, according to the present invention,
The following industrially useful effects are brought about. (1) Since multiple hoists can be appropriately selected and used according to the length of the long material to be lifted, the balance with various lengths according to the length of the long material can be used as in the past. It is possible to hang up a long material of various sizes by a single balance without requiring the above, and it is also easy to hang up a long material in a valley.

(2) Since the crane club and the balance, and the balance and the suspending tool are connected by the expandable telescopic body of the nest tube, the crane traveling of the balance and the suspending tool is performed. Also, shaking, rotation, twisting and the like that occur during traverse can be prevented, and the position of the suspender and the long material suspended by the suspender can be quickly stabilized, so that work efficiency is improved and automatic operation becomes possible.

(3) By adjusting the intervals of a plurality of hoists movably provided on the balance, the hoist interval is set to an optimum hanging position in accordance with the length of the long material and the interval of the table. be able to.

(4) A hanging position detector attached to each side of the plurality of hoists constantly monitors the difference in the hanging positions of the hoists between the hoists, and the difference in the hanging positions is within a certain range. Since the hanging height is controlled so that the length of the long material is not slanted.

(5) By using the automatic lifting device,
The sling operator can be eliminated.

(6) The NC operation of the crane, computerized automatic platform, and computerization of storage / delivery / place management enable full automation of the crane work. Therefore, it is possible to easily convert an existing warehouse into an automated warehouse without constructing an automated warehouse that requires a huge amount of equipment cost.

[Brief description of drawings]

FIG. 1 is an overall schematic front view showing an embodiment of the device of the present invention.

FIG. 2 is an enlarged side view of FIG.

3 is a partially enlarged front view of FIG.

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

FIG. 5 is an explanatory view showing a state in which a space between the club and the balance is contracted and a space between the hoist and the hanger is extended.

FIG. 6 is an explanatory view showing a state in which the space between the club and the balance is extended and the space between the hoist and the hanger is contracted.

FIG. 7 is a front view of an example of a suspender.

FIG. 8 is a side view of FIG. 7;

9 is a plan view of FIG. 7. FIG.

FIG. 10 is a schematic state diagram showing an apparatus of the present invention.

[Explanation of symbols]

 1 Overhead traveling type crane 2 Club 3 Wheel, 4 Rail, 5 Wire, 6 1st steady body 7 Hook, 7'hanging pin, 8 Balance, 8'rail, 9 hoist, 9'wheel, 10 2nd steady body , 11 wires, 12 hooks, 13 hoists, 13 'bracket, 14 hanging position detector, 15 threaded shaft, 16 motor, 17a, 17b sensor, 18 arms, 19 frame, 19' shaft, 20 air cylinder, 21 stand. 22 Long material.

Claims (3)

[Claims] 1. A club movable on an overhead traveling crane in its longitudinal direction, a balance suspended from the club so as to be able to move up and down, and an extendable telescopic tube type connecting the club and the balance. A first steady rest, a plurality of hoists movably attached to the balance in the longitudinal direction thereof, a suspender hung up and down on each of the plurality of hoists, and a plurality of the hoists. An elongate material hoisting device comprising a telescopic second steady rest that connects each of the hoists and the hoisting device. 2. A position detector is attached to each of the plurality of hoists, and the position detector controls the suspension positions of the plurality of hoists within a predetermined range. The device according to claim 1. 3. The pair of frames, wherein the suspenders are provided at predetermined intervals, and the arms that are pivotably provided at the lower ends of the pair of frames in the horizontal direction, and the ends of the arms match when closed. The device of claim 1, comprising a photoelectric sensor mounted on the bottom of each of the pair of frames.