JP3213188B2 - Roll segment fixing device in continuous casting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fixing a roll segment holding a set of slab drawing guide rolls to a segment supporting frame in a continuous casting facility, and more particularly to a cotter for punching and punching when a roll segment is incorporated and removed. The present invention relates to a roll segment fixing device that eliminates hammer work.

[0002]

2. Description of the Related Art In a continuous casting facility, a plurality of rolls serving as a guide for drawing a slab are supported in a roll segment frame as a set of a plurality of rolls, and the roll segment frame is moved along a slab drawing path (pass line). Many are arranged. Guide rolls used under severe conditions are frequently damaged and replaced frequently, and guide rolls are replaced in units of roll segments. Therefore, each roll segment needs to be accurately and firmly and exchangeably fixed to the segment support frame so as not to cause misalignment or the like due to heat or weight of the slab or pressure. Conventionally, such a roll segment fixing device has a structure in which a cotter is driven in by a hammer operation of an operator and the segment is fixed by punching.

FIGS. 5 and 6 are a partial side view and a front view of a continuous casting machine using a conventional roll segment fixing device. A plurality of guide rolls 13 are held on a segment frame 1 constituting a segment main body so as to be along a drawing path of a slab 14, and this segment frame 1 is
0 and is supported and fixed on the segment mounting surface 6a of the segment support frame 6 laid at zero. As shown in FIG. 7 which is a partially enlarged sectional view of FIG. 6, a cotter pin 15 is attached to the segment supporting frame 6 so as to penetrate the supported leg 1a of the segment frame 1. A screw portion is formed at the lower end of the cotter pin 15, the nut 13 and the cotter pin support 16 prevent the cotter pin 15 from falling off, and the distance plate 17 restrains the pin 15 from coming out upward. A cotter pin 15 is provided above the supported leg 1a of the segment frame 1.
The cotter 18 is driven into the cotter hole with a hammer,
Thus, the segment frame 1 is fixed to the segment support frame 6. Similarly, to remove the segment frame 1, the cotter 18 is pulled out by a hammer punching operation.

[0004]

As described above, in the conventional segment fixing device, the roll segment is fixed and removed by hammering and punching of a cotter, and a heavy muscle force operation is required.
The roll segments are arranged along the bend of the slab drawing path to just below the upper mold, and such a hammering operation is extremely difficult because it requires work on high places such as narrow circular stairs with scaffolds. It was a safe, time and labor intensive task. A device such as a worm jack for moving up and down the segment or a hydraulic cylinder 19 (FIGS. 5 and 6) is attached near the cotter, which causes problems such as damage to these devices by mistake during hammering work. There were many.

[0005] The present invention does not require a heavy-strength operation like conventional hammering for fixing and removing the roll segment, and it is possible to improve the operability, safety and labor saving of the roll segment of the continuous casting equipment. An apparatus is provided.

[0006]

According to the present invention, there is provided a cotter pin which projects from a lower side of a segment mounting table of a segment support frame onto a segment mounting surface and has a lower end screwed with a nut, and a lower surface of the segment mounting table. A compression spring unit disposed on the outer periphery of the cotter pin between the cotter pin and a nut at the lower end of the cotter pin, and for urging the cotter pin downward, and inserted into a cotter hole formed in an upper portion of the cotter pin, and A cotter engaged with a roll segment, the roll segment being fastened to the segment support frame by a pressing force of the cotter by a spring force of the compression spring unit, and a segment mounting table of the segment support frame. An auxiliary cotter hole formed in the middle of the cotter pin near the lower side of the cotter pin; Is inserted into the cotter hole, and the upper part is perforated and said segment table underside and Setto of auxiliary Cotter, further comprising a compression spring unit, said segment
An upper spring receiving member provided below the
Between the lower spring receiver and the upper and lower spring receivers
A spring provided on the upper spring receiver.
An insertion port is provided so that an auxiliary cotter can be inserted .

The compression spring unit includes a rod provided on the upper spring receiver and penetrating the lower spring receiver.
A nut screwed to the tip of the rod.

[0008]

After the roll segment is hung by the crane and the roll segment is mounted on the mounting surface of the segment mounting table, the cotter pin is raised by a cotter pin raising drive device such as a hydraulic jack, and the cotter is inserted into the cotter hole. Thereafter, the cotter pin raising drive device is lowered, and the roll segment is fastened to the segment support frame by the pressing force of the cotter due to the spring force of the compression spring unit.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a part of a slab drawing passage portion of a continuous casting machine employing a roll segment fixing device according to an embodiment of the present invention, and FIG. 2 is a front view of FIG. As described in FIG. 5, the segment supporting frame 6 is fixed on the foundation 10 along the slab path, and the segment mounting table 6b of the segment supporting frame 6
A plurality of guide rolls 13 forming a passage of the slab 14 and roll segments having roll holding frames 21 and 22 above and below are placed and fixed. Note that, here, the side of the slab passage toward the center of curvature of the curvature zone is referred to as the upper side or the upper side of the roll segment, and the segment supporting frame side is referred to as the lower side or the lower side of the roll segment.

FIG . 3 is an enlarged side sectional view of a portion A in FIG. FIG. 4 is an enlarged front sectional view of a portion B in FIG.
It is cut along the line CC in FIG. Referring to these figures, the cotter pin 2 is inserted into the segment support frame 6 so as to be vertically displaceable through the segment mounting table 6b of the frame 6 via the bush 4, and the support frame 6 below the cotter pin 2 is provided. A cotter pin raising drive device 9 such as a pneumatic or hydraulic jack and a pneumatic or hydraulic cylinder is provided therein. Cotter pin 2
A cotter hole 23 is formed in the upper surface of the segment mounting table 6b, that is, a portion projecting upward from the segment mounting surface 6a, and the upwardly projecting portion is formed to be larger than the inner diameter of the bush 4, and the segment mounting table 6b An auxiliary cotter hole 24 is drilled in the middle part near the lower side of
Further, a nut 8 is screwed to the screw portion 2a at the lower end of the pin. Lower surface of segment mounting table 6b and nut 8 at lower end of pin
A compression spring unit is provided so as to surround the cotter pin 2. In this embodiment, the compression spring unit is constituted by a disc spring unit 7 using a disc spring as a compression spring, is fixed to the segment mounting table 6b with a bolt or the like, and is formed in a U-shape to form the auxiliary cotter 5. An upper spring receiver 25 provided with an insertion opening 25 ', a lower spring receiver 26 in contact with the upper surface of the nut, and these upper and lower spring receivers 25,
26, a plurality of coned disc springs 27 are provided. The compression spring unit may be a coil spring instead of the disc spring 27.

Further , in the configuration having the upper spring receiver 25 and the lower spring receiver 26 as in the embodiment, as shown in FIGS. 3 and 4, the upper spring receiver 25 has the disc spring 27 and the lower spring. A plurality of rods 28 are provided so as to penetrate the receiving body 26, and the lower spring receiving body 26 is provided so as to be slidable with respect to the rod 28, and the upper spring receiving body 25 and the lower spring receiving body A nut 29 for regulating the distance from the nut 26 is screwed. By providing such an interval regulating member, it becomes easy to mount the compression spring unit 7 on the cotter pin 2.

In this configuration, first, in a state where there is no roll segment on the support frame 6 and the cotter 3 and the auxiliary cotter 5 are also removed, the cotter pin 2 is slightly lower than the state where the roll segment is fixed. 3 is located at a position lower by the gap S between the step surface of the large diameter portion on the upper part of the cotter pin and the segment mounting surface 6a in FIG. The lower roll holding frame 22 thus rolled is placed on the mounting surface 6a of the segment mounting table 6b while being guided by a guide device (not shown).

[0013] Then, raise the cotter pin 2 with a cotter pin rising drive 9 such as the hydraulic jack against the Belleville spring unit 7. This allows the cotter 3 to be freely inserted by hand into the cotter hole 23 above the cotter pin 2. After the insertion of the cotter 3, the cotter pin raising drive device 9 is lowered. The lower roll holding frame 22 of the roll segment is tightened and fixed to the segment mounting surface 6a via the cotter 3 by the downward pulling force of the cotter pin 2 due to the spring force of the disc spring unit 7. Thereafter, the auxiliary cotter 5 is inserted into the auxiliary cotter hole 24 of the cotter pin 2. In this state, the upper part of the auxiliary cotter 5 can contact the lower surface 6c of the segment mounting table 6b. The auxiliary cotter 5 is a safety means provided in consideration of a case where the spring 27 of the disc spring unit 7 is greatly displaced when the roll segment is displaced in the vertical direction due to some external force during operation. It is inserted loosely compared to.

When removing the roll segment, the cotter pin lifting drive 9
With the cotter pin 2 raised, the cotter 3 is extracted. Note that the cotters 3 and 5 do not need to be taper cotters, and may each be constituted by one straight cotter.

[0015]

As described above, according to the present invention, the cotter pin provided on the segment supporting frame is urged downward by a compression spring device such as a disc spring or a coil spring, and is attached to the spring device when the roll segment is attached or detached. The cotter pin is lifted up by a lifting drive device such as a hydraulic jack or hydraulic cylinder provided on the segment support frame to insert the cotter, eliminating the hammering of the conventional dangerous and heavy muscular work of the cotter. Thus, there is an effect that the fastening and release of the roll segment can be quickly performed by a safe and extremely simple operation.

In addition, even if an external force is applied so that the spring of the compression spring unit is largely displaced during operation, the auxiliary cotter is provided, so that no excessive force acts on the spring. If the upper spring receiver and the lower spring receiver are connected by the rod 28, the nut can be easily screwed into the cotter pin when the roll segment fixing device is assembled and mounted on the segment mounting table.

[Brief description of the drawings]

FIG. 1 is a side view of a part of a slab drawing passage of a continuous casting machine employing a roll segment fixing device according to a first embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an enlarged side sectional view of a portion A in FIG. 1;

FIG. 4 is an enlarged front sectional view of a portion B in FIG. 2;

FIG. 5 is a side view of a part of a slab drawing passage of a continuous casting machine employing a conventional roll segment fixing device.

FIG. 6 is a front view of FIG. 5;

FIG. 7 is an enlarged front sectional view taken along line DD of FIG. 5;

[Explanation of symbols]

 Reference Signs List 2 cotter pin 3 cotter 5 auxiliary cotter 6 segment support frame 6a segment mounting surface 6b segment mounting table 7 disc spring unit 8 nut 9 cotter pin raising drive device 13 guide roll 14 cast piece 22 lower segment holding frame 27 disc spring

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshito Watanabe 5-2 Sokaicho, Niihama-shi, Ehime Sumitomo Heavy Industries, Ltd. Inside Niihama Works (56) References JP-A-5-115950 (JP, A) 55-130366 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B22D 11/128 320

Claims (2)

(57) [Claims] 1. A cotter pin projecting from a lower side of a segment mounting table of a segment supporting frame onto a segment mounting surface and having a lower end screwed with a nut, and a lower surface of the segment mounting table and a nut at a lower end of the cotter pin. A compression spring unit disposed between the outer periphery of the cotter pin and biasing the cotter pin downward, and inserted into a cotter hole formed in an upper portion of the cotter pin, and a lower portion engages with the roll segment. The roll segment is fastened to the segment supporting frame by a pressing force of the cotter by a spring force of the compression spring unit, and a cotter pin halfway near a lower side of the segment mounting table of the segment supporting frame. And an auxiliary cotter hole formed in the auxiliary cotter hole, , The upper portion is closed and the segment table underside and Setto of auxiliary Cotter, further, the compression
A spring unit is provided below the segment mounting table.
An upper spring receiver and a lower spring receiver provided on the nut side.
A body, and a spring provided between the upper and lower spring receivers,
The auxiliary cotter can be inserted into the upper spring receiver.
A roll segment fixing device in a continuous casting facility, characterized in that an insertion opening is provided in the roll segment. 2. The compression spring unit according to claim 2, wherein the compression spring unit includes the upper spring receiver.
A rod provided in the lower part and penetrating the lower spring receiver;
And a nut screwed to the tip of the
2. The method according to claim 1, wherein
Lu segment fixing device.