JPS5919547Y2 - Continuous casting machine dummy bar lifting device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a dummy bar lifting device for a continuous casting machine.

At the start of casting in a curved continuous slab casting machine, a dummy bar is used to stop receiving the molten metal and guide the tip of the slab until the tip of the molten metal (slab) has substantially completed solidification.

This dummy bar consists of a neck that contacts the molten metal and engages with the molten metal (slab), and a guide section that is made up of a plurality of connecting members that are pin-joined so that they can bend, and the tip of the guide section is pulled by a wire or the like. ing.

The slab engaged with the neck of the dummy bar is lowered while being bent by a plurality of bending rollers, with its outer surface being cooled from the vertical state, and solidification is substantially completed when the slab reaches the horizontal state.

At this point, the slab and the dummy bar neck are separated and the slab advances along the slab passing line, while the separated dummy bar is lifted above the slab passing line by a dummy bar carriage and stored until the start of the next casting.

A dummy bar lifting device shown in FIG. 1 has conventionally been used to lift this dummy bar.

This device includes a dummy bar carriage 5, a front wheel guide rail 11 of the dummy bar carriage. It is composed of a rear wheel guide rail 12 of a dummy bar carriage and a dummy bar carriage hoisting device 13.

A lifting sheave 8 is attached to the dummy bar carriage 5 coaxially with a front wheel 6 having front wheels 6 and rear wheels 7 provided on both sides thereof.

This device is installed at a position where the tip of the cast slab has almost completed solidification and is in a horizontal state, and the dummy bar 4 advances on rollers (not shown) on the slab passing line and comes to the top of the dummy bar carriage 5. At this point, the neck 4a of the dummy bar
is pushed up from below to separate it from the slab 2 held between the bending rollers 3, and at the same time, the dummy bar carriage 5 is pushed up by the pushing device 10.10, and the carriage claw 9 fixed to the dummy bar carriage 5 is pushed up. The dummy bar is fitted into the neck-side engagement hole 4b to be in the state shown in the figure.

From this state, the dummy bar carriage hoisting device 13
By driving the hoisting winch 14, the sheave 17
A, 8, 17b, and 18 wires 16 are wound around the winding drum 15, and the dummy bar carriage 5 is lifted up.

At this time, the front wheel 6 of the dummy bar carriage 5, which is coaxial with the sheave 8, is guided by the front wheel guide rail 11 and lifted, and after the front wheel rises to a certain extent, the rear wheel also climbs on the rear wheel guide rail 12, and the front wheel 6 is lifted up by the front wheel guide rail 11. When lifted to approximately the center of the guide rail 11, the dummy bar carriage 5 is tilted downward to the right as shown by the imaginary line in the figure, and when the dummy bar carriage 5 is further lifted, the front wheels 6. The rear wheels 7 each have a front wheel guide rail 11. The dummy bar carriage 5 reaches the upper end of the rear wheel guide rail 12, and the dummy bar carriage 5
As shown in the figure, it is lifted into a substantially vertical position.

By the way, the conventional carriage pawl 9 is a simple triangular fixed pawl as shown in FIG. It came off the claw 9 and fell onto the slab passing line, causing a serious accident.

This invention was made to solve the above problem, and its purpose is to provide a dummy bar lifting device for a continuous casting machine that can reliably prevent the dummy par from falling when lifting the dummy bar.

An embodiment of this invention will be described below with reference to FIGS. 3 and 4.

A front wheel 6 and a rear wheel 7 are provided on a dummy bar carriage 5, and a front wheel guide rail 11. The front wheel 6 is attached to the rear wheel guide rail 12,
The device for hoisting the dummy bar carriage 5 by the hoisting device 13 with the rear wheel 7 guided is similar to that shown in FIG.

The difference from the conventional device is that in the past, the dummy bar carriage 5 was simply provided with a triangular carriage pawl 9 (Fig. 2), but now a rotary dummy bar drop prevention lever 22 with a dummy bar locking pawl 22a has been installed. Carriage claw 21.2
The structure is such that it is pivoted to 1.

That is, the carriage pawl 21.21 is a bearing member 21.21 having a bearing 23b of the rotation shaft 23 of the fall prevention lever 22.
A is arranged opposite to the dummy bar carriage 5 with a gap therebetween, and is secured to the fixing members 21b and 21b welded to the dummy bar carriage 5 by means of four poles 21C, respectively.

The dummy bar fall prevention lever 22 is approximately T-shaped, and has a roller 24 supported by a shaft 25 at the vertical lower end of the T-shape, and one side of the upper side of the T-shape (the side that rotates upward when the dummy bar carriage is lifted). A dummy bar locking claw 22a is provided on one side, and a position regulating arm 22b, which also serves as a weight, is provided on the other side to urge the lever 22 to rotate in the direction of contacting the upper surface of the dummy bar carriage.

In addition, the fall prevention lever 22 has a rotation shaft 23 at the middle portion eccentrically toward the roller 24 side, and the fall prevention lever 22 has a rotation shaft 23 which is connected to the bearing members 21a, 21.
When the carriage is in a standby state, where the lever is pivotably mounted on the dummy bar carriage 5 and no external force is applied to the fall prevention lever, the tip of the regulating arm 22b is pressed against the upper surface of the dummy bar carriage 5 by the rotating force of gravity, as shown by the imaginary line in FIG. They are in contact as shown.

In this state, the position of the drop prevention lever is regulated by the regulating arm 22b so that the center position of the roller 24 is closer to the upper surface of the dummy bar carriage than the center position of the rotating shaft 23 (Fig. 4). condition shown by the imaginary line).

With the above configuration, from slab 2 as in the conventional method,
The carriage pawl 21 and fall prevention lever 22 are fitted into the neck-side retaining hole 4b of the separated dummy par 4 by raising the dummy par gear ridge 5 (see FIG. 1).

In this state, when the hoisting device 13 shown in FIG.
Press the roller 24 of the fall prevention lever 22 with the hole end surface 4C.

As a result, the ochiai prevention lever 22 starts rotating about the rotation shaft 23.

Further, when the dummy bar carriage 5 is lifted up, the hole end surface portion 4C hits the carriage claws 21, 21, and the weight of the dummy bar 4 is supported by the carriage claws 21, 21.

On the other hand, the drop prevention lever 22 is mounted on the dummy bar carriage 5.
The dummy bar locking claw 22a is rotated at a substantially right angle to the
It is locked to the front edge portion 4C1 of the hole end (the state shown by the solid line in FIG. 4).

Therefore, the dummy bar carriage 5 is further lifted up and the second
Even if an external force is applied to the dummy par 4 in the substantially vertical state shown in the figure, the dummy par will not come off the carriage pawl 21.

In this embodiment, the dummy bar drop prevention lever 22 is set to T.
Although the shape and the regulating arm 22b are used to regulate the position of this lever when no external force is applied to it, this position regulation may also be achieved by providing a stopper on the dummy bar carriage 5.
Further, the rotational deflection of the fall prevention lever 22 may be performed by a spring or the like.This device is constructed as described above, and the dummy bar locking claw 22a automatically moves into the dummy bar engagement hole when the dummy bar is lifted. Since it is rotatably locked to the front edge portion 4c1 of the hole end, it has the effect of reliably preventing the dummy bar 4 from falling when the dummy bar is lifted.

[Brief explanation of drawings]

Figure 1 is a schematic explanatory diagram of a conventional dummy bar lifting device, Figure 2 is an explanatory diagram showing how the carriage pawl and dummy bar are locked when the dummy bar is lifted almost vertically with the same device, and Figure 3 is an illustration of a conventional dummy bar lifting device. FIG. 1 is a front view of the main part as seen from the direction of line III-III, and FIG. 4 is a front view of the main part shown in FIG.
FIG. 3 is a cross-sectional view taken along line IV. 4... Dummy bar 4b... Dummy bar neck side engagement hole, 4C... Hole end surface of dummy bar retaining hole, 5...
・Dummy bar lifting carriage, 4C1... Front edge of the same hole end, 11... Front wheel guide rail, 12... Rear wheel guide rail, 21... Carriage claw, 22... Dummy bar fall prevention lever , 22 a...Dummy bar locking claw.

Claims (1)

[Scope of utility model registration request] By engaging the claws of the dummy bar suspension carriage with the neck side engagement holes of the dummy bar and moving the carriage upward under the guide of the guide rail, the dummy bar separated from the slab is hooked with the carriage claws. In the dummy bar lifting device, the dummy bar is lifted substantially perpendicularly above the slab passage line, and the carriage claw is provided with a dummy bar locking claw that automatically rotates and locks the front edge of the hole end of the dummy bar engagement hole when the dummy bar is lifted. A dummy bar lifting device for a continuous casting machine, consisting of a pivotable dummy bar fall prevention lever with a rotatable dummy bar drop prevention lever.