JPS6121508Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement to a tong for a slab handling crane.

Generally, a slab handling crane is used to grasp a flat steel ingot (hereinafter referred to as a slab) and transport the slab to a destination while holding it horizontally. By the way, the tongs attached to this crane conventionally have two tong punches attached to one side of the tong 2 so as to be rotatable in a substantially horizontal plane, as shown in FIGS. 6 and 7. Due to the constraint of securing a sufficient amount of rotation for
Therefore, when laying slabs in a restricted room such as a soaking furnace, the spacing between slabs becomes large.

This invention was made to eliminate the above-mentioned drawbacks, and can also be used when gripping a slab where both edges are not parallel, or when gripping a slab with the tongs roughly centered on the slab. To provide a pair of tongs for a slab handling crane that can completely grip at three points, but can reduce the spacing between slabs in a restricted room such as a soaking furnace.

Below, the example will be explained with reference to the drawings.
In FIGS. 1 to 4, reference numeral 1 indicates a tongue head which is held by a slab handling crane (not shown) in a manner that it can be raised and lowered.

2 and 2' are a pair of tongs for gripping work. The middle part of the tongs 2 is rotatably supported on the tong head 1 by a spherical seat 3, and the tong 2' is rotatably supported on the tong head 1 by a pin 4. The upper end of the tongue 2' is connected to one end of a link 8 by a pin 7, and the other ends of both links 6, 8 are connected to a rod 9 for opening and closing the tongue by a pin 1.
Connected with 0.

The intermediate portion of the tongue and the tongue head and the upper end of the tongue and the link in the spherical support portion and the spherical connection portion are spaced apart from each other so as to be rotatable relative to each other.

Tong punch 11A is located inside the lower end of tongs 2,
11B are fixed in line, and one tong punch 12 is provided inside the lower end of the tongs 2'.

Since the present invention is constructed in this manner, when the tongs 2, 2' are closed by the upward movement of the tong opening/closing rod 9 when gripping a long slab, the tongs 2, 2' are closed as shown in FIG. In the case of a slab 15 where both edges are not parallel, the tong punch 11A and the tong punch 12 are used to grip the slab at two points, but when the tong opening/closing rod 9 is moved further upward, the tongs 2 are held against the tongue head 1 and the link 6 by their spherical seats. 3,
5, move the tongs punch 1 as shown by the one-dot chain line.
It rotates toward the end surface of the slab 15 in a substantially horizontal plane using the punch 1A as a fulcrum, and stops at the position where the tongue punch 11B comes into contact with the end surface of the slab. Therefore, the slab can be gripped at three points.

As described above, according to the present invention, a slab can be gripped at a complete three points even when gripping a slab whose end edges are not parallel or when gripping a slab with the tongs roughly centered on the slab. In addition to being able to safely and reliably transport the tongs to the destination, the tongs, which have two tong punches immovably arranged side by side at the lower end, are supported spherically on the tong head and can be rotated in a substantially horizontal plane. As a result, operational problems caused by dust are eliminated, and the tongs can be operated reliably and easily over a long period of time. In addition, since two tong punches are fixedly installed side by side at the lower end of the tongs, the horizontal length of the lower end of the tongs can be greatly reduced compared to conventional equipment. It has many effects such as being able to make things.

[Brief explanation of the drawing]

Fig. 1 is a front view of the tongs for a slab handling crane according to the present invention, Fig. 2 is a sectional view taken along the line in Fig. 1, Fig. 3 is a sectional view taken along the line in Fig. 1, and Fig. 4 is a sectional view taken along the line in Fig. 1. 5 is a view showing the movement of the tongs 2 when gripping a slab, FIG. 6 is a view showing a conventional example, and FIG. 7 is a sectional view taken along the line of FIG. 1...Tong head, 2...Tong, 3...Spherical seat, 5...Spherical seat, 6...Link (tong operating body), 11A, 11B...Tong punch.

Claims (1)

[Scope of utility model registration request] In a slab handling crane that grasps a steel ingot by opening and closing two opposing tongs, one of the tongs has two tong punches immovably arranged side by side at its lower end, the middle part of which is spherically supported by the tong head, and the upper end of the tong. It is spherically connected to one end of the link connected to the tong actuating body, and the tong middle part and the tong head and the tong upper end and the link in the spherical support part and the spherical joint part are spaced apart so that they can rotate relative to each other. Tongs for slab handling cranes.