JPH032576B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a dummy bar guide device in continuous casting equipment.

Conventional structure and its problems In continuous casting equipment, the slab is pulled out along the slab conveyance path by pulling a dummy bar from the mold, and then the tail of the dummy bar is placed at an appropriate location on the slab conveyance path. The dummy bar is engaged with the disposed dummy bar hoisting hook to release the connection between the head of the dummy bar and the slab, and the hook is raised to hoist the dummy bar to the operating floor. A dummy bar guide is provided slightly upstream of the hook so that the pin of the dummy bar tail portion properly engages with the hook. Conventional dummy bar guides are integrally connected to their drive mechanism, so if the dummy bar meanderes more than expected and collides with the dummy bar guide, the drive mechanism will also be damaged. The drawback is that it causes a lot of damage. Furthermore, in the past, the structure of the drive mechanism was such that the dummy bar guide was swung in order to project upward from below the roll top of the roll that constitutes the slab conveyance path of the dummy bar guide. The disadvantage is that it becomes complicated and leads to increased costs.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a dummy bar guide device for continuous casting equipment that eliminates the above-mentioned conventional drawbacks.

Structure of the Invention In order to achieve the above object, the dummy bar guide device in the continuous casting equipment of the present invention is provided slightly upstream of the dummy bar hoisting hook, which is disposed at an appropriate position in the slab conveyance path so as to be able to rise and fall freely. The dummy bar guide is composed of a cam and a guide body that is projected from below to above the top of the rolls that constitute the slab conveyance path by rotation of the cam.

Embodiment and Operation An embodiment of the present invention will be described below based on the drawings. Reference numeral 1 denotes a roll constituting a slab conveyance path, 2 a hoisting hook for a dummy bar 3 disposed at an appropriate position on the slab conveyance path so as to be able to rise and fall freely, and 4 a base end fixed to a horizontal shaft 5 directly below the hook 2. It is a detection lever whose tip can protrude upward from below the roll top, and a detection roller 6 for abutting the tail portion of the dummy bar 3 is disposed at its tip. A dummy bar guide 7 is provided slightly upstream of the hook 2, and includes a pair of cams 7A fixed to a support shaft 8, a dummy bar guide supported by a guide frame 9 so as to be movable up and down, and mounted on the cams 7A. It is comprised of a pair of guide bodies 7B that are placed on the roll top and protrude from below to above the roll top by rotation of a cam 7A. Reference numeral 10 is a connecting rod whose one end is connected with a pin to the cam 7A and whose elongated hole at the other end fits into a pin of the guide body 7B, and is provided just in case to ensure that the guide body 7B interlocks with the cam 7A. It is something that Reference numeral 11 is a pinion fixed to one end of the support shaft 8, and reference numeral 12 is a rack that meshes with the pinion 11, and is slidably supported by a support frame 13. 14 is a motor cylinder for sliding the rack 12; 15 is an interlocking rod supported horizontally movably on a fixed frame 16; 17 is an interlocking metal fitting bolted to one end of the interlocking rod 15; The hole 18 fits into a pin 20 at the tip of an arm 19 fixed to the horizontal shaft 5. 21 is a crank mechanism that connects the other end of the interlocking rod 15 to an appropriate position on the outer circumference of the pinion 11. 22
is a fan-shaped frame fixed to one end of the horizontal shaft 5, to which two strikers 23 and 24 are fixed. 25 is a hook engagement detection limit switch provided opposite the striker 23, and 26 is an abnormality detection limit switch provided opposite the striker 24.

Hereinafter, the effects of the above configuration will be explained. Figure 2, Figure 3 solid line, Figure 4 solid line, and Figure 5
The figure shows the state before the start of continuous casting, in which the detection lever 4 is held upright by the balance weight at the lower end, and the protrusion of the cam 7A is pushing up the upper part of the guide body 7B to above the roll ceiling. Next, casting is started and the dummy bar 3 is pulled out of the mold, thereby pulling out the slab, guided by the roll 1, and conveyed in the direction of arrow A, and the pin 3 of the tail part
A engages with the hook 2 which is waiting at the position shown in _FIG .
As a result of the rotation, the striker 23 hits the detection arm of the limit switch 25, and a hook-up signal is issued. This signal causes the hook 2 to rise, and the hook 2 engages with the pin 3A, causing the dummy bar 3 to
is rolled up. In this case, if the hook 2 does not engage with the pin 3A, the tail part pushes the detection roller 6 further, so when the detection roller 6 is moved by _α2 , the striker 24 activates the limit switch 26. It hits the detection arm and an abnormal signal is emitted. Therefore, no unexpected accidents will occur. Next, when the winding of the dummy bar 3 begins (or after winding is completed), the motor cylinder 14 is operated to slide the rack 12 in the direction of arrow B. As a result, the pinion 11 is rotated in the direction of arrow C, and the cam 7A is also rotated in the same direction via the support shaft 8, so that the protrusion of the cam 7A is removed from the guide body 7B, and the guide body 7B is As shown in the solid line in Figure 6, it descends below the roll ceiling. Therefore, there is no possibility that the slab will collide with the guide body 7B. At the same time, the crank mechanism 21 and the interlocking rod 1
5. The detection lever 4 is rotated in the direction of arrow D via the interlocking metal fitting 17, the pin 20 and the horizontal shaft 5,
The detection roller 6 is brought below the roll top. Therefore, there is no risk of the slab colliding with the detection roller 6 and the detection lever 4. Next, even if the dummy bar 3 has a large meandering motion and collides with the guide body 7B, the impact force will not be transmitted to the support shaft 8 because the guide body 7B is only placed on the cam 7A. , rack 12, pinion 11, motor cylinder 14, etc., will not be damaged.

Effects of the Invention As described above, according to the present invention, even if the dummy bar collides with the guide body, the impact force is not transmitted to the cam, so the drive mechanism that rotates the cam is not damaged, and no damage is caused. This can be kept to a minimum. Furthermore, since the guide body is raised and lowered by a cam, the structure is simpler than that of the conventional one, and costs can be reduced.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a plan view, Fig. 2 is a cross-sectional view, Fig. 3 is a side view, Fig. 4 is a longitudinal sectional view, and Figs. 5 and 6 are guides. FIG. 3 is a schematic explanatory diagram showing the ascending and descending state of the main body. 1...Roll, 2...Hook, 3...Dummy bar, 4...Detection lever, 7...Dummy bar guide,
7A...Cam, 7B...Guide body, 11...Pinion, 12...Rack, 14...Motor cylinder, I...Roll top.

Claims (1)

[Claims] 1. A dummy bar guide installed slightly upstream of the dummy bar hoisting hook, which is arranged at an appropriate position on the slab conveyance path so that it can be raised and lowered, is connected to a cam and the rolls that constitute the slab conveyance path by the rotation of the cam. A dummy bar guide device for continuous casting equipment, comprising a guide body that projects from below to above a roll top.