JPH0442307Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a hanging tool, and is particularly used for hanging not only one coil, but also two or three coils, or for lifting and transporting pipe materials, bundled wire materials, etc. related to hanging equipment.

(Prior Art) When transporting heavy objects such as coils and wires, it is widely practiced to lift and transport one or two at the same time. However, conventional devices for suspending and transporting three objects at one time only include three-point C hooks as shown in FIGS. 8 and 9. In this conventional device, three claws 43 are horizontally attached to the sides of a rotating frame 42 which is rotatably attached to a main frame 40 via a rotating bearing 41 at the apex positions of a substantially equilateral triangle. It has a structure in which a sheave block 45 is attached to the upper part via a rotating table 44. Sheave block 45
is lifted by a crane (not shown), and a hollow object 1 such as a coil is attached to each claw 43 as shown in FIG.
is suspended and three objects 1 are transported at once.

(Problem to be solved by the invention) The conventional 3-point C hook described above has no problem when hanging one object or when hanging two objects at the same time, but when hanging three objects, there is no problem. Unless two objects are lined up horizontally at the bottom and one object is placed on top of them (as shown in Figure 9), three claws 4
3 cannot be used at the same time. Therefore, when the object to be lifted is a coil, there is a drawback that cargo handling operations are limited by the way the coils 1 are stacked and the size of the inner diameter of the coils 1. In addition, when lowering the suspended coil, there is a risk that the two lower coils will roll laterally due to the upper coil, which poses a danger to the work.

The present invention solves the above-mentioned problems and provides a lifting tool that can improve cargo handling efficiency, save labor for slinging workers, and improve safety, and is also useful for preventing handling defects for lifted objects. With the goal.

(Means for Solving the Problems) The present invention includes a pair of pivotable outer arms each having a hanging fitting fixed to its lower end, and a drive mechanism section for causing the pivoting movement of the outer arms. has been done. The outer arm has an upper end pivotally connected to the upper frame, a substantially middle portion thereof connected via a link to a slider that moves up and down along a vertical guide frame fixed to the upper frame, and a hanging fitting at the lower end. The sliders move toward each other or move away from each other as the sliders move up and down.

Further, in addition to the above configuration, the present invention includes a central movable hanging metal fitting disposed between the two arms and moving up and down, and a drive mechanism portion that causes the movable hanging metal fitting to move up and down.

The slider and the movable hanger are each moved up and down by a suitable drive device via a transmission means such as a screw mechanism or wire disposed along a vertical guide frame.

With this configuration, when an object is lifted by the hanging fittings at the lower ends of the pair of outer arms and three horizontally lined objects are hung, the movable hanging fittings and the outer arms are operated to separate from each other. Three hanging fittings are positioned on substantially the same horizontal plane, thereby lifting and suspending three objects arranged in parallel.

(Example) Next, the present invention will be described with reference to the drawings.

Figure 1 shows a hanging tool according to an embodiment of the present invention with a coil 3.
FIG. 2a is a front view showing the hanging state, and FIG. 2a is a side sectional view taken along the line - in FIG. A hanging bracket 14 is hung on the center of the upper surface of the upper frame 2, and a pair of outer arms 3 of the same length are attached to both sides of the front end.
4 are pivotally connected at their upper ends via pins 6 so that they can rotate in the same vertical plane. Each arm 3,4
As clearly shown in FIG. 4, which will be described later, a hanging fitting (hereinafter referred to as C hook) 9 is fixed horizontally to the lower end of the hook. A guide frame 5 extending vertically downward is fixed to the center position of the front end of the upper frame 2, and a horizontal movable hanging fitting (hereinafter referred to as movable C hook) 1 is attached to the guide frame 5.
A base portion 10a of the guide frame 5 is housed so as to be vertically movable with respect to the guide frame 5 while maintaining a horizontal state. In order to enable the movable C hook 10 to move up and down, a vertically elongated guide groove 5a for the movable C hook 10 is formed in the front and rear surfaces of the frame-shaped guide frame 5. A first threaded rod 11 extending from the upper end to the lower end of the guide frame 5 is pivotally supported, and as best shown in FIG. 10a are screwed together, and as the threaded rod 11 rotates, the movable C hook 10 is guided by the guide frame 5 and moves up and down. In this embodiment, the first threaded rod 11 corresponds to the movable hanger transmission means in the present invention. The guide frame 5 also functions to prevent the movable C-hook 10 from rotating due to the rotation of the threaded rod and to receive the moment acting on the movable C-hook during lifting. The guide frame 5 also includes a slider 7 that slides up and down within the guide frame 5 and the slider 7.
A second threaded rod 12 is housed therein, and the slider 7 is connected to the middle portion of each outer arm 3, 4 via a pair of rings 8, as shown in FIG. In this embodiment, the second threaded rod 12 corresponds to the slider transmission means in the present invention. As shown in FIG. 2b, the slider 7 and the link 8 are connected by a pin 31. Window holes 5b for inserting the links 8 are formed in the longitudinal direction on both sides of the frame-shaped guide frame 5, as shown in FIG. 2b. By the rotation of the second threaded rod 12, the arms 3 and 4 on both sides are moved to the first
The posture changes between the expanded position shown in the figure, where the distance between the outer C hooks 9 at the lower end is widened, and the converged position, where the distance between the lower end C hooks 9 is narrowed, as shown in FIG. 3 or 5.

Next, a rotational drive device for the first and second threaded rods 11 and 12 will be explained with reference to FIG. 2a and FIG. 6. FIG. 6 schematically shows a power transmission mechanism from the drive motor 13 installed on the upper frame 2 to the first and second threaded rods 11 and 12. A transmission shaft 15 extends from the output shaft of the drive motor 13 to the front end of the upper frame via a suitable coupling, and a pair of bevel gears 16, 17 and first and second screws are rotatably fitted loosely to the transmission shaft 15. Bevel gear 1 fixed to the upper end of the rod
8 and 19 are interlocked. Electromagnetic clutches 20 and 21 are provided between each of the bevel gears 16 and 17 and the transmission shaft 15, respectively. As an example of the structure of the electromagnetic clutches 20 and 21, movable plates 22 and 23 are attached to the shafts of the respective bevel gears 16 and 17 by means of spline engagement, for example, and a friction plate 24 is mounted facing each of the movable plates 22 and 23. , 25 are fixed to the transmission shaft 15, and the movable plates 22, 23 are configured to slide in the axial direction by electromagnetic devices 26, 46 to come into contact with or separate from the friction plates 24, 25. There is.

With such a configuration, if three coils 1 arranged in parallel are to be hung at the same time, the outer arms 3 and 4 should be extended as shown in FIG.
0 along the guide frame 5 to the coil position, and the coil 1 is suspended by the two C hooks 9 at the lower ends of the outer arms 3 and 4 and the movable C hook 10. When hanging two coils 1, as shown in Fig. 3, the outer arms 3 and 4 are moved (converged) to narrow the distance between them, and the central movable C
The hook 10 is stored in an upper position where it does not get in the way of the coil 1 (Fig. 4), and hung from the C hook 9 at the lower end of the arms 3 and 4. When suspending one coil 1, as shown in FIG. 5, the outer arms 3 and 4 are moved closer together, and both C hooks 9 are inserted into the single coil to suspend it. In the present invention, the vertical movement of the central movable C-hook 10 and the expansion and contraction movements of the outer arms 3 and 4 are performed separately and independently by one drive motor 13 through the operation of the electromagnetic clutches 20 and 21 mentioned above. Therefore, for example, when the degree of expansion of the outer arms 3 and 4 is changed depending on the coil diameter, or when only one of the three coils has a different outer diameter, it is possible to place coils with different diameters in the center. It is also possible to set the movable C-hooks 10 at appropriate vertical positions to hang three hooks at the same time.

A balance tank 2 is attached to the rear end of the upper frame 2.
7 is provided, and the suspension fitting 14 at the center of the upper frame 2 is preferably configured to be adjustable in position so that it can respond to changes in the overall center of gravity depending on the width of the suspended load, that is, the length of the coil. At this time, if necessary, a tilt detector can be provided to further improve the overall stability. In FIG. 2a, the reference numeral 28 is a swing drive motor, and a pinion gear 29 fixed to its output shaft is a gear 30 fixed to the hanging fitting 14.
The entire C-hook can be rotated by the operation of the motor 28.

In the above embodiment, the movement of the pair of outer arms 3, 4 and the movable C-hook 10 in the center was configured by transmission means using a screw mechanism, but these movements were configured by a hydraulic cylinder or a motor and wire as shown in FIG. It is also possible to use other means such as a sheave or a chain and sprocket. In the embodiment shown in FIG. 7, two motors, a motor 37 for driving the outer arm and a motor 38 for driving the movable C hook, are mounted on the upper frame 2, and these motors 37 and 38 are connected to the sheaves 33 and 3.
5 is installed, and these sheaves 33, 3
Corresponding sheaves 34 and 36 are pivotally supported below 5, and these sheaves 33, 34 and 3
Wires 32 and 39 are wound between the wires 5 and 36, and the slider 7 and the base 10a of the movable C hook 10 are connected to the middle of each wire, and the motors 37 and 38
The slider 7 is rotated by the rotation of each wire 32, 39 by
And the movable C hook 10 is designed to move up and down. In the embodiment shown in FIG.
2 correspond to the slider transmission means.
It goes without saying that the sheave and wire described above may be replaced with a sprocket and a chain, respectively. In addition, in the present invention, operations such as lifting the upper frame 2 by an overhead crane, transporting it, and unloading the cargo can be performed by remote control from the driver's cab, which also ensures operational safety.

(Effects of the invention) As explained above, according to the invention, three objects of the same size or different sizes loaded in the most stable horizontal and juxtaposed state can be stably and safely lifted, lowered and transported. Even when one or two pieces are being hung, the hanging work can be done effectively and safely by automatically changing the form to match the hanging. There are various effects such as improved work efficiency, labor saving for workers, and prevention of handling flaws when hanging coils.

[Brief explanation of the drawing]

Figure 1 is a front view of the embodiment of the present invention in a three-piece suspended state, Figure 2a is a side sectional view taken along line - in Figure 1, and Figure 2b is a line taken along line X--X in Figure 2a. FIG. 2c is an enlarged sectional view taken along line Y-Y in FIG. is a side view of FIG. 3, FIG. 5 is a front view of the embodiment in a state in which one unit is suspended, FIG. 6 is a schematic side view of the drive device applied to the present invention, and FIG. 7 is a schematic side view of the drive device applied to the present invention. FIG. 8 is a side cross-sectional view showing another embodiment of the drive device according to the eighth embodiment.
9 and 9 are a front view and a side view, respectively, of a conventional three-point C hook. 1... Coil, 2... Upper frame, 3, 4...
...Outer arm, 5... Guide frame, 7... Slider, 8... Link, 9... Hanging fitting (C hook), 10... Movable hanging fitting (movable C hook), 11
...First threaded rod, 12...Second threaded rod, 13
... Drive motor, 15 ... Transmission shaft, 16, 17,
18, 19...bevel gear, 20, 21...electromagnetic clutch.

Claims (1)

[Scope of utility model registration request] An upper frame that is suspended from a crane, a pair of outer arms that are pivotally attached to both sides of the upper frame so as to be rotatable in the same vertical plane, and a pair of outer hanging brackets that are respectively attached to the lower ends of the outer arms. a vertical guide frame suspended and fixed to the upper frame at intermediate portions of each pivot point of the outer arm; and a movable guide frame held by the guide frame so as to be movable up and down along the guide frame. A hanging fixture, a slider held by the guide frame in a vertically movable manner, and a midway portion of each of the outer arms are connected to each other, and each of the outer arms is expanded or contracted by the vertical movement of the slider. a link, a movable hanging fitting transmission means provided along the guide frame and engaging with the movable hanging fitting to move the movable hanging fitting up and down, and a movable hanging fitting transmission means provided along the guide frame and said slider. A hanging tool comprising: a slider transmission means that engages with the slider to move the slider up and down; and a drive device that is held by the upper frame and drives the movable hanging fitting transmission means and the slider transmission means.