JPS6116718B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lifting device used mainly for lifting and transporting long objects such as steel pipes.

Conventionally, when transporting steel pipes using a crane, etc., a worker picks up the hook of the crane and hooks it onto the wire wrapped around the steel pipe or the end of the pipe, but this method is not only time-consuming but also reduces work efficiency. There was some dissatisfaction with not being able to save labor.

The present invention solves the above problems, and one embodiment thereof will be described below with reference to the drawings. In the figure, 1 is a rectangular pipe-shaped main rod, which can be hoisted horizontally by hooking the hooks of a crane or the like (none of which are shown) to a pair of locking tools 2 attached to its top surface. ing. A hydraulic cylinder mechanism 3 is provided inside the main rod 1. The hydraulic cylinder mechanism 3 is parallel to the main rod 1, and its cylinder 4 is attached to a mounting member 5 installed inside the main rod 1. A mounting member 7 is attached to the outer end of the piston rod 6 of the hydraulic cylinder mechanism 3, and two sets of four pulleys 9 are rotatably attached to the mounting member 7, respectively, via a horizontal shaft 8. installed. Attachment members 10 are attached to the interior of the main rod 1, located on both sides of the substantially central portion of the cylinder 4 of the hydraulic cylinder mechanism 3.
Individual pulleys 12 are rotatably attached. A pair of mounting members 13 are mounted at one end of the interior of the main rod 1 at a distance from each other, and a pulley 15 is rotatably mounted to each of these mounting members 13 via a horizontal shaft 14. . A pair of mounting members 16 are mounted at the other end of the main rod 1 with a space between them.
A pulley 18 is rotatably attached to each of the pulleys 6 via a horizontal shaft 17. Four attachment members 19 are attached to the inside of the main rod 1 at intervals from each other. One end of a wire rope 21 is connected to each of these supporting members 19 via a connecting fitting 20. The wire ropes 21 on both inner sides are connected to the fourth pulley 9 counting from both outer sides → the fourth pulley 12 counting from both outer sides → the third pulley 9 counting from both outer sides → the third pulley 9 counting from both outer sides The third pulley 12 → pulley 15 → (extended to the outside from the opening at one end of the main rod 1) is wound around the pulley 57 (to be described later), and then the other end is connected to the lower surface of the main rod 1 via the connecting fitting 22. The support member 23 is connected to one end of the support member 23 . The wire ropes 21 on both outsides are connected to the first pulley 1 counting from both outsides.
2 → First pulley 9 counting from both outsides → Second pulley 12 counting from both outsides → Second pulley 18 counting from both outsides → (Outside from the other end opening of main rod 1) pulley 5 (explained later)
7 and then the other end is connected to the connecting fitting 24.
It is connected to a support member 25 attached to the other end of the lower surface of the main rod 1 via. Therefore, the piston rod 6 of the hydraulic cylinder mechanism 3 is connected to the cylinder 4.
As the mounting member 7 protrudes further, the mounting member 7 moves to the left in FIGS. 1 and 2 together with the pulley 9, and the distance between the pulley 9 and the pulley 12 increases due to this movement. The wire rope 21 is retracted into the main rod 1 and the amount of wire rope 21 fed out from the openings at both ends of the main rod 1 is reduced, while the hydraulic cylinder mechanism 3
When the piston rod 6 retracts into the cylinder 4, the mounting member 7 and the pulley 9 move together.
As the wire rope 21 moves to the right in the figures and FIG. ing. In this embodiment, the wire rope 21 is let out or retracted by a length four times the amount of movement of the piston rod 6. Therefore, the hydraulic cylinder mechanism 3
is 1/ of the maximum payout amount of the wire rope 21.
It is sufficient that the main rod 1 has a stroke of 4, and there is no need to enlarge the main rod 1 itself.

Below the main rod 1, two round pipe-shaped sub-rods 27 are connected via a spacing mechanism 26 for each two rods.
is provided parallel to the main rod 1. The spacing holding mechanism 26 includes a mounting member 28 attached to the lower surface of the main rod 1, a pipe 29 whose one end is rotatably attached to the mounting member 28, and a pipe 29 movably fitted into the pipe 29. a spring (not shown) housed in the pipe 29 and biasing the rod 30 in the direction of retraction into the pipe 29; and a mounting member 31 that can be attached to the sub-rod 27 and attached to the sub-rod 27.
are supported parallel to the main rod 1 with a space therebetween, and also serve to absorb vibrations when the sub rod 27 oscillates relative to the main rod 1.

A round pipe-shaped movable arm 32 is fitted into the sub-rod 27 so as to be slidable in the longitudinal direction of the sub-rod 27, and one end of the arm 32 protrudes from an opening at one end of the sub-rod 27. A round pipe-shaped movable arm 33 is fitted in the movable arm 32 so as to be slidable in the length direction of the movable arm 32, and one end thereof protrudes from the other end opening of the sub-rod 27. . Sprockets 34 are disposed at both ends of the interior of the sub-rod 27, and these sprockets 3
A chain 35 is wound around the movable arm 33 between the two. Portions of the chain 35 corresponding to the other end edges of the movable arms 32, 33 are connected to the other end edges of the movable arms 32, 33 via connecting members 36, respectively. A hydraulic motor 37 is attached to one end of the sub-rod 27, and the chain 35 is moved in the direction of arrow A or B by driving the hydraulic motor 37. When the chain 35 moves in the direction of the arrow A due to the drive of the hydraulic motor 37, both movable arms 32 and 33 simultaneously retract into the sub-rod 27, and on the other hand, the chain 35 moves in the direction of the arrow A due to the drive of the hydraulic motor 37. When moving in direction B, both movable arms 32 and 33 simultaneously project from the sub-rod 27.

The auxiliary rods 27 each have 2 spaces apart from each other.
Individual brackets 38 are attached. An arm 39 is detachably attached to the bracket 38 and is inclined appropriately toward the lower side of the sub-rod 27. A guide roller 41 is rotatably attached to the arm 39 via a horizontal shaft 40. There is. Brackets 42 are attached to the lower portions of the protruding ends of both movable arms 32 and 33, and guide rollers 4 are connected to these brackets 42 via horizontal shafts 43, respectively.
4 is rotatably attached. Brackets 4 are attached to the protruding ends of both movable arms 32 and 33, respectively.
5 is installed. The bracket 45 has an elongated hole 46 extending in the vertical direction, and a horizontal shaft 47 is loosely fitted into the elongated hole 46. A guide roller 48 and a hook 49 are rotatably attached to the horizontal shaft 47, respectively. The hook 49
The inner peripheral surface of is coated with an elastic body 50 made of, for example, urethane rubber. A pressing member 52 is rotatably attached to the tip of the hook 49 via a pin 51, and an elastic body 53 made of, for example, urethane rubber is attached to the pressing surface of the pressing member 52. A support member 55 is rotatably attached to the hook 49 via a connecting member 54, and a pulley 57 is rotatably attached to the support member 55 via a horizontal shaft 56.

Note that a hydraulic unit 5 is installed on the lower surface of the main rod 1.
The hydraulic cylinder mechanism 3 and the hydraulic motor 37 are controlled by the hydraulic unit 58. Furthermore, four television cameras 59 are movably attached to the lower surface of the main rod 1.
These television cameras 59 are used to monitor the steel pipe 6 on the hook 49 when remotely performing a steel pipe lifting operation, which will be described later.
This is for checking the degree of engagement with respect to 0.

Next, a case will be described in which, for example, the steel pipe 60 is lifted and moved by the above-mentioned configuration device. Note that the figures shown by solid lines in FIGS. 1 and 2 and FIG. 4 show the case where a steel pipe 60 with a relatively small diameter and short axis is lifted.
1 and 2, and FIGS. 5 and 6 show the case where a relatively large-diameter, long-axis steel pipe 60 is lifted. First, a hook of a crane or the like is hooked onto the lifting fitting 2 of the main rod 1, and the main rod 1 is brought directly above the steel pipe 60 to be lifted together with the sub rod 27, etc., and then the piston rod of the hydraulic cylinder mechanism 3 is 6 into the cylinder 4 so that the wire rope 21 can be fed out from the main rod 1, and the hydraulic motor 37 moves the chain 35 in the direction of arrow B to move the movable arms 32, 33 to the sub rod 27. The steel pipe 60 to be lifted is made to protrude by an amount equal to or more than the length thereof, and then the main rod 1 is moved together with the secondary rod 27 etc. by the operation of the crane or the like.
The guide rollers 41, 44, and 48 are lowered until they come into contact with the outer peripheral surface of the steel pipe 60. The arm 39 supporting the guide roller 41 has a length corresponding to the diameter of the steel pipe 60 to be lifted. Therefore, the arm 39 acts as a guide and moves downward along the outer circumferential surface of the steel pipe 60.
The positional error of the sub-rod 27 relative to the position is automatically corrected. Then, the chain 35 is moved in the direction of arrow A by the hydraulic motor 37, and the movable arm 32,
33 is retracted into the secondary rod body 27, the piston rod 6 of the hydraulic cylinder mechanism 3 is made to protrude from the cylinder 4, and the wire rope 21 is retracted into the main rod body 1.
After being sequentially displaced to the states shown by arrows P, Q, and R in the figure, the steel pipe 60 is held in the state shown in FIG. 3. At this time, the hook 49 moves to the left in FIG. 7 while the elastic body 50 on its inner peripheral surface is rubbed by the edge of the steel pipe 60.
7 above the oblong hole 46 and stand up a little,
After the pressing member 52 is tilted to the left in FIG. 3, the state shown in FIG. 3 is finally reached. For this reason, the pressing member 52
Since the pressing member 52 contacts the inner surface of the steel pipe 60 accurately and clamps the steel pipe 60, and in the lifting state, the pressing member 52 contacts the steel pipe 50 not at a point but at a plane and lifts it, so that the steel pipe 50 is held by the hook 49. There is no possibility of partial deformation. When the movable arms 32 and 33 move into and out of the sub-rod 27, the guide rollers 44 and 48 roll on the outer peripheral surface of the steel pipe 60, and the elastic body 50 of the hook 49 and the elastic body 53 of the pressing member 52 roll. Because it is pressed against the steel pipe 60,
The steel pipe 60 can be smoothly held by the hook 49, and the steel pipe 60 can be held easily by the hook 49.
without damaging it. When the crane or the like is operated to lift the main rod 1 together with the sub-rod 27, etc., the steel pipe 60 held by the hook 49 as described above is lifted in a horizontal state, and then the crane or the like is operated. The steel pipe 60 lifted as described above is brought directly above the desired position and then lowered.
Thereafter, the piston rod 6 of the hydraulic cylinder mechanism 3 is retracted into the cylinder 4 so that the wire rope 21 can be fed out from the main rod 1, and the chain 35 is moved in the direction of the arrow B by the hydraulic motor 37 to move the movable arm. 32 and 33 are made to protrude from the sub-rod 27, thereby releasing the clamping of the steel pipe 60 by the hook 49 and positioning the steel pipe 60 at a desired position.

Although the steel pipes 60 are moved as described above, when moving two steel pipes 60 at a time, each pair of hooks 49 is used to move each steel pipe 60 as shown in FIGS. 4 and 5, respectively. 60, and with both steel pipes 60 in contact with each other, each pair of guide rollers 41 is brought into contact with the outer peripheral surface of each steel pipe 60, and in this state, the two steel pipes 60 are held together. It is lifted and moved all at once. When moving the steel pipe 60 one by one, as shown in FIG.
may be brought into contact with the outer peripheral surface of the steel pipe 60 from both sides, and the steel pipe 60 may be lifted and moved in this state.

In this way, since the steel pipe 60 is lifted and moved with both ends of the steel pipe 60 held between the hooks 49 and the guide rollers 41 in contact with the outer peripheral surface of the steel pipe 60, the steel pipe 60 is moved during movement. Even if the steel pipe 6 is shaken, it will not fall, and since the spacing mechanism 26 is vertically expandable and retractable as described above, the lifting device itself will not be damaged.
0 can be transported safely and quickly.

As described above, the lifting device of the present invention includes a movable main rod, a sub-rod disposed below the main rod in a spaced-apart manner, and a sub-rod that is telescopically fitted into both ends of the sub-rod. a pair of movable arms equipped with the movable arm, and a hook that has a pressing member that can freely rotate up and down at the distal end thereof and that is attached by loosely fitting a horizontal shaft into an elongated hole that is elongated in the vertical direction at the distal end of the movable arm. , the hook is configured to include an extendable connecting member connecting the hook and both ends of the main rod, and an arm provided on the secondary rod so as to be inclined toward the lower side of the rod. , it is possible to quickly and safely lift and transport long objects such as steel pipes without bothering the operator's hands as in the past, and both arms are extendable and retractable in the length direction of the sub-rod. Because of this, it is possible to arbitrarily lift and transport various long objects of different lengths. Furthermore, the hook has a vertically rotatable tip and is attached with a horizontal shaft loosely fitted into an elongated hole in the vertical direction of the movable arm, making it possible to accurately hold the steel pipe with the hook. In addition, the steel pipe will not be deformed by the pressing member. Further, since the arm moves along the outer peripheral surface of the steel pipe and automatically corrects any positional error of the sub-rod relative to the steel pipe, it has the advantage of being easy to work with.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view, FIG. 2 is a front view, FIG. 3 is a detailed view of the circular portion of FIG. 2, and FIG. 4 is a diagram showing two relatively small diameter Figure 5 is a side view of steel pipes being lifted at once; Figure 5 is a side view of two relatively large-diameter steel pipes being lifted at once; Figure 6 is a side view of one relatively large-diameter steel pipe being lifted. A side view in this state, FIG. 7, is a diagram for explaining the operation of the hook. 1... Main rod, 21... Wire rope, 27...
...Secondary rod, 32, 33...Movable arm, 49...
Hutsuku.

Claims (1)

[Claims] 1. A movable main rod, a sub-rod disposed below the main rod and facing each other at a distance, a pair of movable arms telescopically fitted to both ends of the sub-rod, and a pair of movable arms that can be rotated up and down. hooks each having a movable pressing member at its tip and attached with a horizontal shaft loosely fitted into a vertically elongated oblong hole at the tip of the movable arm;
It is characterized by comprising an extendable connecting member that connects the hook and both ends of the main rod, and an arm that is provided on the auxiliary rod so as to be inclined toward the lower side of the rod. Lifting equipment.