JPH032577B2 - - 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 configuration and its problems In continuous casting equipment, a dummy bar is pulled out along the slab conveyance path by pulling it from the mold, and then the tail portion of the dummy bar is placed at an appropriate position on the slab conveyance path. The dummy bar is engaged with a 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 work 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, when the dummy bar guide was made to protrude from below the top of the roll of the roll constituting the slab conveyance path,
Since the dummy bar guide is configured to swing, the structure of the drive mechanism becomes complicated, resulting in an increase in costs. Furthermore, in the case of equipment that is used both for slabs and twin blooms, it is necessary to prepare two types of side guides, but conventionally switching between them required complicated operations and was time-consuming.

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 with a twin broom located slightly upstream of the dummy bar hoisting hook, which is disposed at an appropriate position on the slab conveyance path so as to be able to rise and fall freely. A dummy bar guide for use and a dummy bar guide for slab are provided, and each dummy bar guide includes a cam and a guide that is made to project from below to above the top of the roll of the roll that constitutes the slab conveyance path by rotation of the cam. The cam of the dummy bar guide for twin blooms and the cam of the dummy bar guide for slabs are fixed to a support shaft, and both are shifted from each other by a predetermined angle, and the support shaft is rotated by a predetermined angle. A driving device is provided for selectively protruding the guide body of the twin bloom dummy bar guide or the guide body of the slab dummy bar guide above the roll top via each cam.

Embodiment and Operation An embodiment of the present invention will be described below based on the drawings. 1 is a roll constituting the slab conveyance path; 2 is a hook for hoisting twin blooms and slab dummy bars 3A and 3B which are arranged at appropriate positions on the slab conveyance path so that the light can be raised and lowered; and 4 is a hook whose base end is the same as the hook 2. It is a detection lever that is fixed to the horizontal shaft 5 directly below and whose tip can protrude upward from below the roll top.A detection roller 6 for abutting the tail portions of the dummy bars 3A and 3B is disposed at the tip. It has been set up. 7 and 8 are dummy bar guides of the twin bloom dummy bar 3A and the slab dummy bar guide 3B provided slightly upstream of the hook 2,
Integral cams 7A and 8B are fixed to the support shaft 9 with a predetermined angular shift from each other, and the cams 7B and 8 are supported by the guide frame 13 so as to be able to rise and fall.
It is comprised of a pair of guide bodies 7B and 8B which are placed on A and are made to protrude from below the roll top in that direction by rotation of cams 7A and 8A. Reference numeral 10 is a connecting rod whose one end is connected to the cams 7A, 8B with a pin, and whose elongated hole at the other end fits into the pin of the guide bodies 7B, 8B.
This is provided to ensure that cam 8B interlocks with cams 7A and 8A. 11 is a pinion fixed to one end of the support shaft 9, and 12 is a rack that meshes with the pinion 11 and is slidably supported by the support frame. 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 a movement 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 a proper position on the outer circumference of the pinion 11. 22 is a fan-shaped frame fixed to one end of the horizontal shaft 5, and two strikers 23 and 24 are fixed thereto. 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 6
The figure shows the state before the start of continuous casting of twin blooms, 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 positioned on the guide body 7.
The upper part of B is pushed up above the roll top, and the guide main body 8B is located below the roll top.
Next, casting is started and the dummy bar 3A is pulled out of the mold, thereby pulling out the twin bloom, and guided by the roll 1, the dummy bar 3A is pulled out from the mold.
When the pin 30 of the tail portion engages with the hook 2 waiting at the position shown in FIG. 4, the tail portion hits the detection roller 6, and the detection roller 6 is moved (α1). As the detection lever 4 rotates, 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, engage the pin 30, and wind up the dummy bar 3A. In the unlikely event that the hook 2 does not engage with the pin 30, the tail portion of the detection roller 6
As you press further, the detection roller 6 moves to (α2)
When it is moved, the striker 24 hits the detection arm of the limit switch 26 and an abnormality signal is generated. Therefore, no unexpected accidents will occur. Next, when the winding of the dummy bar 3A starts (or after the winding is completed), the motor cylinder 1
4 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 9, so that the protrusion of the cam 7A is removed from the guide body 7B, and the guide body 7B is As shown by the solid line in Figure 7, it descends below the roll ceiling.
Therefore, there is no possibility that the twin blooms will collide with the guide body 7B. At the same time, the crank mechanism 2
1. The detection lever 4 is rotated in the direction of arrow D via the interlocking rod 15, the interlocking fitting 17, the pin 20, and the horizontal shaft 5, and the detection roller 6 is brought below the roll top. Therefore, there is no possibility that the twin blooms will collide with the detection roller 6 and the detection lever 4. Next, the meandering of dummy bar 3A is large,
Even if the guide body 7B collides with the guide body 7B, since the guide body 7B is only written on the cam 7A, the impact force will not be transmitted to the support shaft 9, and the impact force will not be transmitted to the rack 12, pinion 11 and motor cylinder 1.
4 etc. will not be damaged.

Next, when continuously casting slabs, from the state shown in FIG.
2 in the direction of arrow B. As a result, the pinion 11 is rotated in the direction of arrow C, and the protrusion of the cam 8A causes the guide body 8B to rotate as shown in FIG.
The top of the roll is pushed up above the roll top.
Next, when casting is started and the dummy bar 3B is pulled and the slab is pulled out, the dummy bar 3B is pulled out as shown in Figure 5.
B is guided by the guide body 8B and engages with the hook 2. The subsequent operations are almost the same as in the twin bloom case, so the explanation will be omitted.

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. Furthermore, switching between twin bloom and slab can be done by simply rotating the spindle, and the guide body of the dummy bar guide for twin blooms or the guide body of the dummy bar guide for slabs can be selectively protruded above the roll top. It is easy to operate and requires no effort.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, and FIG. 1 is a plan view when using a dummy bar for twin blooms, and FIG.
The figure is a cross-sectional view of the same, Figure 3 is a side view of the same, Figure 4 is a longitudinal cross-sectional view of the same, Figure 5 is a cross-sectional view when using a dummy bar for slabs, and Figures 6 to 8 are the guide body. FIG. 1... Roll, 2... Hook, 3A... Dummy bar for twin bloom, 3B... Dummy bar for slab, 4... Detection lever, 7, 8... Dummy bar guide, 7A, 8A... Cam, 7B, 8B ... Guide body, 9 ... Support shaft, 11 ... Pinion, 12 ...
Rack, 14...Motor cylinder (drive device).

Claims (1)

[Claims] 1. A twin bloom dummy bar guide and a slab dummy bar guide are provided slightly upstream of the dummy bar hoisting hook which is arranged at an appropriate position on the slab conveyance path so as to be able to rise and fall freely, and each dummy bar guide is connected to a cam and a dummy bar guide. ,
It consists of a guide body that is projected from below to above the top of the roll of the roll that constitutes the slab conveyance path by the rotation of the cam, and the cam of the dummy bar guide for twin blooms and the cam of the dummy bar guide for slabs are connected to each other. The guide body of the dummy bar guide for twin breams or the guide body of the dummy bar guide for slabs is fixed to the support shaft and shifted by a predetermined angle from each other, and the support shaft is rotated by a predetermined angle through each cam. A dummy bar guide device for continuous casting equipment, characterized in that it is provided with a drive device that selectively projects the roll top upward.