JPH0232062B2 - RENZOKUCHUZOSETSUBINIOKERUCHUHENHIKINUKISOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a slab drawing device in a continuous casting facility that pulls a slab by sandwiching it between a stationary roll and a pressing roll that face each other.

(Prior Art) Conventionally, as shown in FIG.
It is known that the motor is driven from the side via universal spindles 3, 3.

However, the above device has a problem in that it cannot be applied to three or more strands for the following reason. That is, when this device is applied to three or more strands, the universal spindles 3, 3 and the drive mechanism (not shown) are located on the extension of the axis of the drive rolls 2, 2, so the universal spindles 3, 3
and because the drive mechanism interferes with adjacent strands.

Therefore, as shown in FIG.
A worm reducer 6, 6 is disposed at one end of the roll 5, and the worm reducer 6, 6 is driven via a universal spindle 3 extending in the direction in which the drive rolls 5, 5 are pressed toward the other rolls. It is conceivable that this method can be applied to cases of three or more lands. However, if this is done, the number of drive rolls 5, 5 will be halved, resulting in a problem that the pulling force or holding force will be halved. Of course, as shown in FIG. 3, worm reducers are provided on both opposing rolls 5, 5, and both rolls 6, 6 are connected via universal spindles 3, 3 on both sides and both worm reducers 6, 6. Although it is conceivable to drive it, in this case, there is a drawback that driving sources are required on both sides.

Therefore, as shown in FIG. 4, it may be possible to connect the worm reducers 6, 6 of the paired rolls 5, 5 with a gear coupling spring 7, and provide a driving source only on one side. . However, in a slab drawing device in continuous casting equipment, the distance L between the rolls changes when the rolls press the slab, when the dummy bar is pressed, when the rolls wear out, etc., so the allowable stroke of a general gear coupling , the permissible eccentricity amount, and the permissible deviation angle amount cannot absorb the above-mentioned change in the distance between the rolls.

(Objective of the Invention) Therefore, the object of the present invention is to be applicable to the case of three or more strands, and to drive a fixed side roll and a pressing side roll that is pressed toward the fixed side roll with one drive source. Yes, and between rolls
The purpose is to allow the device to be used without any problems even if the

(Structure of the invention) In order to achieve the above object, the structure of this invention is as follows.
The worm reducer attached to the fixed side roll and the worm reducer attached to the pressing side roll are connected by a gear coupler that is expandable and retractable in the pressing direction of the pressing side roll, and one of the worm reducers is connected to the worm reducer attached to the pressing side roll. Provided in a worm reducer connected to a spindle extending substantially in the pressing direction of the pressing side roll to drive the fixed side and pressing side rolls via the spindle and the worm reducer, and driving the pressing side roll. The present invention is characterized in that the torque arm is fitted into a rotation stopper provided on the frame of the pressing side roll so as to be slidable in the pressing direction but not rotatable.

(Example) Hereinafter, the present invention will be explained in detail with reference to illustrated examples.

Figure 5 shows vertical continuous casting equipment, with mold 11
The slab 12 flowing down from the slab is pulled out by a slab pulling device 13,
It was pulled out at 13 and 14.

As shown in FIGS. 6, 7, and 8, the slab drawing device 13 has a fixed side roll 17 attached to a frame 16, and a pressing side roll 18 attached so as to be movable forward and backward toward the fixed side roll 17. The side roll 18 is pressed in the direction of the stationary roll 17 by a hydraulic cylinder 19, and the slab 12 is sandwiched between the rolls 17 and 18 and pulled out.

Worm wheels 21a and 22a of worm reducers 21 and 22 are attached to the fixed roll 17 and the pressing roll 18, respectively. The worm shaft 21b of the worm reducer 21 and the worm shaft 22b of the worm reducer 22 are arranged in a straight line along the pressing direction of the pressing side roll 18,
The two worm shafts 21b and 22b are connected by a gear coupling 23 which is expandable and retractable in the pressing direction as will be described later.

One end of a universal spindle 26 extending substantially in the pressing direction is connected to the input side of the worm shaft 22b of the worm reducer 22, and the other end of the universal spindle 26 is connected to a drive motor via a reducer 27. 28 to drive the rotation.

On the other hand, torque arms 33 and 34 having slits 31 and 32 are fixed to the cases of both the worm reducers 21 and 22, respectively.
The slits 31 and 32 of 3 and 34 are inserted into the frame 16.
The worm reducers 21, 22 are fitted into detents 36, 37 fixed to the slits 36, 37 so as to be slidable in the pressing direction, and the worm reducers 21, 22 are engaged with the slits 31, 32 and the torque arms 33, 34 to prevent rotational force. The worm reducers 21 and 22 are prevented from rotating even if they receive force.

The gear coupling ring 23 has a structure as shown in FIG. That is, the outer flange portion of the outer tube 42 having the inner teeth 41 and the outer flange portion of the outer tube 43 having the inner teeth 41 are overlapped and fixed with a plurality of reamer bolts 44, and further, the outer tube 4 is fixed with a plurality of reamer bolts 44.
1, 43, and external teeth 48, 4 formed on the outer flange portions 47, 47 of the inner cylinders 46, 46.
8 are fitted respectively. The width of the external teeth 48, 48 is smaller than the width of the internal teeth 41, 41 so that the inner cylinders 46, 46 can move in the axial direction with respect to the outer cylinders 43, 43. In other words, the inner cylinders 46, 46 can move toward or away from each other, forming a telescopic portion. The above internal teeth 48, 4
Although not shown, a curved and protruding crowning is formed on the flank surface of 8, and an appropriate backlash is formed to allow the deviation angle and eccentricity of the inner cylinders 46, 46 with respect to the outer cylinders 43, 43. That's what I do. In addition, side plates 51 having cutout steps 50, 50 are provided on the end surfaces of the outer cylinders 42, 43,
51 are fixed respectively, and the stepped portions 5 of the side plates 51, 51 are fixed.
Annular spaces 55, 55 are formed between 0, 50 and the presser plates 52, 52. Annular O-rings 5 are placed in the hollow spaces 55, 55, and O-rings 5 are placed in the recesses on the inner and outer peripheries.
A holder 58 holding 6 and 57 is fitted. The O-ring 56 contacts the outer periphery of the inner cylinder 46, and the O-ring 57 contacts the side plate 51 to seal lubricating oil.

Further, the gear coupling ring 23 holds the air bleed mechanism 61 so as to be clamped between the inner peripheral portions 42a and 43a of both the outer cylinders 42 and 43. The air bleed mechanism 61 has an outer circumferential groove 65 that communicates with relief plugs 63 and 64 dedicated to air supply and exhaust.
It consists of a ring 66 having the diameter of the ring 66 and a pipe 67 having the diameter of the ring 66. The outer circumferential groove 65 of the ring 66 and the pipe 67 communicate with each other via a passage 69, and a hole 71 is provided at the longitudinal center of the pipe 66, that is, at the axial center position of the inner cylinder 46. By supplying and exhausting the inside of the gear coupler 23 through the lubricating oil, leakage of lubricating oil to the outside is prevented.

Further, the worm shafts 21b, 22b of the worm reducers 21, 22 shown in FIG. 8 are connected to the through holes 72, 72 of the axes of the inner cylinders 46, 46, respectively. In addition, 75, 75 are key grooves 76, 76
is an air passage.

In the slab drawing device for continuous casting equipment having the above configuration, the slab 12 is sandwiched between the stationary side roll 17 and the pressing side roll 18 by the pressing force of the hydraulic cylinder 19, and both of the rollers 17, 18 It is pulled out by the rotational drive of.

The pressing side roll 18 is rotationally driven by a drive motor 28 via a worm reducer 22, a universal spindle 26 and a reducer 27 attached thereto, and the stationary side roll 17 is connected to the worm reducer 22. Gear cut spring 23
and is rotationally driven via a worm reducer 21. Therefore, both rolls 1 on the pressing side and the fixed side
8 and 18 are driven by one drive source (driving motor), and even if the distance between the two rolls changes, the gear coupling 23 expands and contracts, that is, the inner cylinders 46 and 46 By being inserted into and removed from the outer cylinders 47 and 43, the gear coupling 23 expands and contracts, and the torque arms 34 and 33 slide against the detents 37 and 36, so that fluctuations in the distance between the rolls are prevented. Can be absorbed. Further, the torque arms 33 and 34 engage with the detents 36 and 37 to prevent rotation of the cases of the worm reducers 21 and 22. Further, since the universal spindle 26 extends in the pressing direction of the pressing roll 18 as shown in FIGS. 6 and 7, there is no interference even in the case of three or more strands.

FIG. 10 shows a modification of the gear coupling used in the present invention.

This gear coupling spring 23 has outer cylinders 42, 43
The first inner cylinder 101, 1 fitted into the inner teeth 41, 41 of
By making the external teeth 102, 102 of 01 movable in the axial direction, errors in the axial direction, that is, fluctuations between rolls, can be absorbed. In addition, the inner teeth 105, 10 of the first inner cylinder 101, 101
5, the crowned outer teeth 107 of the second inner cylinder 106, 106, the second inner cylinder 106, 106
By supporting both sides of the worm reducer with spherical sliding surfaces 108, 108, the second inner cylinders 106, 106 are supported rotatably around center 0, and eccentricity of the shafts of both worm reducers is prevented. It is designed to absorb the declination angle. In FIG. 10, parts having the same functions as those of the gear coupling in FIG. 9 are designated by the same reference numerals, and the explanation thereof will be omitted.

Note that the slab drawing device of the present invention can also be applied to bending type continuous casting equipment.

(Effects of the Invention) As is clear from the above explanation, since the slab drawing device in the continuous casting equipment of the present invention is configured as described above, it can be used without interference even in the case of three or more strands. Moreover, the pressing side roll and the fixed side roll can be driven by one driving source,
Moreover, it can be used without any problem even if the distance between the rolls varies.

[Brief explanation of drawings]

Figures 1, 2, 3, and 4 are diagrams explaining conventional examples, Figure 5 is a front view of continuous casting equipment using an embodiment of the present invention, and Figures 6 and 7 are plan views of the above embodiment, respectively. FIG. 8 is an enlarged partial sectional view of FIG. 6, FIG. 9 is a front view of the gear coupling, and FIG. 10 is a front view of a modification of the gear coupling. 12... Slab, 17... Fixed side roll, 18...
... Pressing side roll, 21, 22 ... Worm reducer, 23 ... Gear coupling, 26 ... Universal spindle, 33, 34 ... Torque arm, 36, 37 ... Rotation stopper.

Claims (1)

[Scope of Claims] 1. A slab drawing device for continuous casting equipment that pulls slabs by sandwiching them between fixed side rolls facing each other and a pressing side roll that is pressed toward the fixed side rolls, which comprises: The worm reducer attached to the roll and the worm reducer attached to the pressing side roll are connected by a gear coupling that is expandable and retractable in the pressing direction of the pressing side roll and extends substantially in the pressing direction of the pressing side roll. A torque arm connected to a spindle and provided on a worm reducer that drives the stationary side and pressing side rolls via the spindle and a worm speed reducer and drives the pressing side roll is attached to the frame of the pressing side roll. A slab drawing device for continuous casting equipment, characterized in that the device is fitted to a provided detent so as to be slidable in the pressing direction but not rotatable.