JPS62259987A - Overhead crane device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an overhead crane device for use in factories, warehouses, etc.

[Conventional technology]

FIGS. 4 and 5 are a top view and a front view showing a conventional method for positioning an overhead crane device, for example, according to JIS 158801, so as to be able to lift a suspended load. -3 pieces, (υ is placed on the steel support of the factory,
A pair of foot rails, (2) are for rails + C butts of an overhead crane that can be run on IJ, (3)
) is the predetermined position i of this digit +21! A driver's cab with a controller attached, +4) a girder +2) a trolley disposed so as to be movable in the longitudinal direction of the upper girder, a drum installed on the trolley (4), and a drum (5) The wire rope (7), which is wound or unwound by the b-roll of the wire rope (6), is attached to the end of the wire rope (6) with a metal equalizer and an equalizer (4).

(8) is a hook supported by wire rope (6);
) is the shipment, that is, the object to be lifted, UU is the sling operator, Cta
is the crane operator, (2) is the direction of movement of the trolley (4) or the hook (8), (2) is the traveling direction of the crane, (t4' is the longitudinal direction of the crane (2)) The difference between the center of the hook (3) and the center of gravity of the lifted object (9) (4) is due to the hook (
Displacement between the center of 8) and the center of gravity of the lifted object (9), αQ
is an electromagnetic brake.

In such an overhead crane device, the positions of the girder (2), trolley (4), and hook (8) are controlled by drivers I and Iυ.

Next, the positioning of the hook (8) and the object to be lifted (9) will be explained. For example, a suspended object placed in a factory (9)
When hoisting the object (9), the driver αυ (2) approaches the object (9) to sling and align the center of gravity of the object (9) with the center of the hook (8). The object to be lifted (9) while observing the operator's hand signal.
(on the other hand, the trolley (4) is moved and controlled to align the center of the hook t6) with the center of the hoisted object (9).

In this way, each direction (
It is confirmed that the deviation between the center of the hook (8) and the center of gravity of the lifted object (9) is approximately zero.

At this time, the sling operator 4 moves the trolley (4) in the longitudinal direction of the sling (2), that is, in the transverse direction μs (the hook (8)
) Since it is difficult to confirm the position of the hook (8) from the driver's perspective, guide the movement of the trolley (4) using hand signals.
) and the center of gravity of the lifted object (9).

[Problem that the invention seeks to solve]

Since the conventional overhead crane device is constructed as described above, the method of traversing center N Ttp is performed as described above. Therefore, for cranes that are fixed in the operator's cab, it is difficult for the operator to visually assess the deviation between the center of gravity and the hook center in the lateral direction, and he has to rely on the rigging operator to check. There was a problem that the work was troublesome.

This invention was made to solve the above-mentioned problems, and an object thereof is to provide an overhead crane device in which the hook center can be easily confirmed.

[Means for solving problems]

The overhead crane device according to the present invention emits a light beam in the direction of the hook center, and by observing the light spot from the driver's cab, it is possible to visually check the misalignment between the center of gravity of the hoisted object and the hook center. .

[Effect]

In the overhead crane device of the present invention, a light spot projected directly onto the surface of the object to be lifted by the light beam fζ emitted from the beam pressure generating device can be easily visually confirmed from the driver's seat which is higher than the object to be lifted.

〔Example〕

An embodiment of the present invention will be described below.

In Figures 1 and 2, +21, +4) to t9
), (The opening to σ is the same as the conventional one.QfI
is a light irradiation device, which includes a drum (5) and an equalizer sieve (
6), and are attached to the trolley (4) so as to face each other in a predetermined direction via wire lobes (6). As shown in FIG. 8, this light irradiation device αη is equipped with, for example, a halogen lamp (7) on one side of the case connected to the mounting bracket (G), and the other side of the case 01 is attached with a predetermined focal length. A lens 2υ is provided, and its blinking is controlled from the driver's cab (3). (c) is a light irradiation device (
A pair of rays at a given distance, emitted from (b)? The irradiation angles at which υ intersect are adjusted so that they are approximately equal.

Next, the alignment operation between the hook (8) and the object to be lifted (9) will be explained. When the crane operator (b) moves the crane (2) toward the object to be lifted (9) placed in the factory, he approaches the object to be lifted (9) at a slow speed. The light irradiation device αη is operated. As a result, the light point of the irradiated ray 4 and the direction Q parallel to the digit (2)
Operator IJG confirms the deviation of the center of gravity of the suspended load (9) at Align the point almost on the same line as the center of gravity of the lifted object (9).

Next, the driver 〇η moves the trolley (4) laterally (2) to the light beam) and slings while watching the hand signals of the worker uQ, After confirming that the position of the center of gravity of (9) matches, the crane movement operation is stopped, and the sling lowers the hook (8) to a predetermined position in accordance with the instructions of operator 4. Accordingly, the sling operator Akira hooks the wire rope that has been hung over the object to be lifted (9) onto the hook (8) and sends a signal to the operator αυ to raise the hook (8).

Here, in FIG. 2 1, two light irradiation devices ση
The case where one light spot is formed on the suspended object by the light beam (4) of the f-cone irradiated by the light beam irradiation device is shown, but the beam irradiation angle of the light beam irradiation device α force is fixed so that it intersects at a predetermined position. In this case, if the height of the lifted object (9) from the floor is higher than or lower than the reference rope height as shown by the broken line in Figure 2, the lifted object (9) ) above (Since there are two light spots each, the center of gravity can be determined approximately at the center of the distance between the light spots. Therefore, the deviation between the light spot and the center of the hook, which changes depending on the height of the suspended load, can be calculated. By performing measurements in advance, it is possible to expect the same operation as in the above embodiment even if only one light irradiation device is used.

Note that the distance between the light irradiation device and the light spot may be measured and the light irradiation angle of the light irradiation device may be adjusted so that the light spot is on the vertical line of the hook. Good too.

Further, if the light beam is colored by a predetermined means, visual confirmation from the driver's cab becomes easier.

Furthermore, although the above embodiments have been explained in the case of a trolley type crane, the same effects as in the above embodiments can be expected even when used in a hoist type crane.

〔Effect of the invention〕

As described above, according to the present invention, since the light point is emitted so that the position perpendicular to the center of gravity of the hoisted object is almost the same as the hook, both the sling operator and the operator can easily confirm the position. can.

This improves the efficiency of crane sling work.

[Brief explanation of drawings]

1 and 2 are a front view and a side sectional view showing a crane device according to an embodiment of the present invention, and FIG. 8 is a perspective view of a light irradiation device. FIGS. 4 and 5 are a front view showing a conventional crane device. FIG. 2 is a diagram and a side sectional view. In the figure, (υ is the running rail, (2) the ladder, (3)
(4) is a trolley, (9) is an object to be lifted, αη is a light beam generator, and (4) is a light beam. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] (1) A driver's cab is provided on a girder movably supported on a pair of rails, and the object to be lifted is lifted by a hook provided on a trolley whose movement is controlled in the longitudinal direction of the girder. An overhead crane device characterized by being equipped with a light irradiation device that can irradiate a light beam near the center of gravity of a suspended object. (2) The overhead crane device according to claim 1, characterized in that there are two light beam irradiation devices and they are arranged so that the two light beams intersect on a vertical line drawn downward from the hook. (3) The overhead crane device according to claim 1 or 2, characterized in that the light beam has a predetermined color tone.