JP2662292B2 - Hanging device gripping mechanism - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanger for carrying a slab, and more particularly, to a rectangular straight slab having a uniform slab width and a tapered slab having a variable slab width. The present invention relates to a gripping mechanism for a hanging tool that can be reliably gripped with a claw.

Prior Art FIG. 5 shows a hanger conventionally used for carrying a slab. After lowering the hanger with a crane until the tong support roller 1 hits the slab 2, the left and right gripping mechanisms 3 are used. The slab 2 is grasped, lifted and moved, and a grasping mechanism for grasping the slab is provided with a bracket 5 connected to the sheave 4 and suspended, as shown in FIG. A screw shaft 6 that is pivotally supported and has a left-hand thread on one side and a right-hand thread on the other side, and a motor (not shown) that drives the screw shaft 6 to rotate in the forward or reverse direction.
A pair of arms 11 each rotatably supported at one end by a pin 9 slidably fitted in a vertical hole 8 formed in the bracket 5 and projecting from the bracket 5 to the left and right;
The tongue lever 14 is provided with a claw 12 which is attached to the other end of the shaft 11 and is engaged with the end face on the slab side at the lower end, and a nut 13 which is screwed into the screw portion of the screw shaft 6 at an intermediate portion. The tongue lever 14 is opened and closed by the rotation of the screw shaft 6 in the forward or reverse direction, and the claw 12 grips or opens the slab 2.

Problems to be Solved by the Invention In recent years, the slab width can be changed continuously without stopping the continuous casting machine, and as a result, a tapered slab having a taper in the longitudinal direction has been produced, and the slab width is uniform. Not only straight slabs, but also such tapered slabs are transported.However, the gripping mechanism of the hanging tool conventionally used to transport the slab is fixed with the left and right claws fixed in parallel. Therefore, for a straight slab, the claws are uniformly engaged with the slab, and a stable gripping force can be secured.On the other hand, for a tapered slab, only the ends of the claws are engaged, and as a result, The frictional force with the slab is reduced, making it difficult to operate the crane. When the taper slab is gripped, the tongue lever is twisted and the pins, screw shafts, nuts and other grippers connected to it. Excessive force was applied to the structure, causing damage to each part and shortening the life.

An object of the present invention is to solve the above-mentioned problem and to provide a gripping mechanism that allows a nail to uniformly engage with a slab and stably grip the tapered slab as well as a straight slab.

The gripping mechanism according to the present invention is therefore provided with a pair of tongue levers that can be opened and closed, and rotatably attached to the tongue levers,
An arm, which comprises a claw that is removably engaged with the slab, and a hook that detachably holds the slab with the claw, an arm protruding from both sides of the tongue lever and extending on both sides of the claw, It comprises a coil spring for restoring the claws, which respectively connects the claws.

To attach the pawl to the tongue lever rotatably, for example, a lateral groove is provided in the tongue lever, and a claw holder fitted in the groove is pivotally mounted with a pin.The lateral groove is formed in the tongue lever, and the groove bottom is formed in an arc shape. On the other hand, a protrusion formed on the claw holder and a protrusion fitted into the groove formed into a circular arc having the same or smaller radius of curvature as the circular arc at the bottom of the groove, or a combination of the two is used.

When the tongue lever is closed and the pawl is pressed against the slab-side end face, the pawl is rotated according to the taper of the slab, and the entire pawl is engaged with the slab. When the pawl releases the slab, the pawl is restored by the action of the coil spring and returns to a straight and parallel state.

By providing a projection with an arc diameter on the claw holder and fitting it into the groove of the tongue lever and engaging it with the center of the tongue lever or a portion including this part, the gripping force is not affected even if the claw holder rotates. The force is applied at or near the center of the tongue lever, thereby eliminating or reducing excessive force applied to the tongue lever and other gripping mechanisms.

Embodiment A recess 22 is formed on the side surface of the lower end of the tongue lever 21, and the groove bottom (side surface) 23 of the recess 22 forms an arc.
Arms 24 that bend to the near side protrude from the left and right sides.

A claw holder 26 with a claw 25 attached to the front has a semicircular protrusion 27 smaller than the radius of curvature of the tongue lever side 23 at the rear.
The projection 27 is fitted into the recess 22 so as to engage with the side surface 23 at the center A of the side surface 23, and is rotatably supported by a pin 28. Each of the left and right ends is
A shaft 31 slidably passed through a square piece 29 pivotally supported at the end is connected to a shaft 31 by a coil spring 32.

The present embodiment is configured as described above. When the slab 33 is gripped, the claw holder 26 rotates according to the taper of the slab 33, and the entire claw 25 is engaged with the slab 33. That is, as shown in FIG. 3, when the slab 33 is a tapered slab and the claw 25 hits one side of the slab, the tongue lever 21 is closed and the claw 25 is closed.
When the member 25 is pressed against the slab 33, the claw holder 26 rotates the shaft 31 as shown in FIG. 4, and rotates while the coil spring 31 is slightly extended, so that the entire claw is engaged with the side surface of the slab. Note that even if the claw holder 26 rotates, the tongue lever side 23
Does not change.

Thereafter, when the tongue lever 21 is lifted with the slab 33 sandwiched between the claws 25, the tongue lever 21 receives a reaction force of the gripping force (the weight of the gripping mechanism + the weight of the slab). There is no twist in 21.

According to this embodiment, the claw holder is rotated by the angle of the taper and the entire claw is engaged with the slab not only for the straight slab but also for the tapered slab, so that a sufficient frictional force can be ensured. The tongue lever is prevented from torsion because the reaction force of the gripping force is received at the center of the lever, so that a stable gripping force, a long life of components and a stable operation can be secured. When the claw 25 is released from the slab 33, the coil springs 32 on both sides of the claw holder 26 are about to contract, and return to the state shown in FIG. In the state of FIG. 4, the effective width when the nail is fully opened is reduced by the travel of the corner part of the nail (the corner part at the left end in the figure), but when the state is restored to the state of FIG. Maintained at maximum width.

Effects of the Invention According to the gripping mechanism of the hanging tool of the present invention, not only a rectangular straight slab having a uniform slab width but also a taper slab having a variable slab width can be fully engaged with the slab because the entire claw can be engaged with the slab. As in the case of the straight slab, the tapered slab can be stably gripped by securing a sufficient frictional force. Further, when the claw is released from the slab, the claw is restored by the action of the coil spring and returns to the original position, so that the effective width of the claw fully open is not reduced, and no operation for restoring the claw is required.

In addition, when the arc-shaped protrusion provided on the claw holder is engaged with the groove bottom of the tongue lever at the center of the tongue lever, unnecessary force such as twisting is applied to the tongue lever and other gripping mechanisms As a result, the life of the components can be prolonged and stable operation can be ensured.

[Brief description of the drawings]

1 is a perspective view of a main part of a gripping mechanism, FIG. 2 is a plan view of the same when gripping a straight slab, FIGS. 3 and 4 are plan views of the same when gripping a tapered slab, and FIG. FIG. 6 is a front view of the gripping mechanism. 21 ... Tong lever, 22 ... Recess 24 ... Arm, 25 ... Claw, 26 ... Claw holder 27 ... Protrusion, 28 ... Pin, 32 ... Coil spring 33 ... Slab

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Shinichi Inoue 111-1 Showa-cho, Kure-shi, Hiroshima Nisshin Steel Corporation Kure Works (72) Inventor Moriyasu Ishikawa 11th Showa-cho, Kure-shi, Hiroshima No. 1 Inside Nisshin Steel Co., Ltd.Kure Works (72) Inventor Yoshinori Yoshida 11-1 Showa-cho, Kure City, Hiroshima Prefecture Inside Nisshin Steel Co., Ltd.Kure Works (72) Inventor Takuzo Daito Showa-cho, Kure City, Hiroshima Prefecture 11-1 Inside Nisshin Steel Co., Ltd. Kure Ironworks Co., Ltd. (56) References JP-A 63-84089 (JP, U) JP-A 51-29565 (JP, U)

Claims (4)

(57) [Claims] 1. A hanging device comprising: a pair of tongue levers which can be opened and closed; and a claw rotatably attached to the tongue lever and engageable with a slab so as to be detachably engaged with the slab. A gripping mechanism comprising: an arm protruding from both sides of a tongue lever and extending to both sides of a claw; and a claw restoring coil spring connecting the arm and the claw, respectively. 2. The gripping mechanism according to claim 1, wherein a lateral groove is formed in the tongue lever, and a claw holder to which the pawl is attached is fitted in the lateral groove and is pivotally mounted by a pin. 3. The tongue lever is formed with a lateral groove having an arc-shaped groove bottom, and the claw holder with the claw is provided with a projection having an arc having a radius of curvature equal to or smaller than the radius of curvature of the groove bottom. 2. A gripping mechanism of a hoisting device according to claim 1, wherein said hook is fitted into said lateral groove, and at least a part of said projection is always engaged at the center of the tongue lever at the bottom of said groove even when the claw holder rotates. . 4. The mechanism according to claim 3, wherein the claw holder is pivotally mounted on a pin by a pin.