JPH07116825A - Device for fitting/removing plate brick in sliding nozzle device - Google Patents

Abstract

PURPOSE:To smoothen the workability at the time of fitting/removing a plate brick. CONSTITUTION:A brick holding block 2 and a cam 5 used to both of two kinds of a cam 3 for fastening the brick and a cam 4 for releasing are arranged in a metallic frame 1. At the time of turning the cam 5 to the fastening direction, the brick holding block 2 is pushed from the side of the cam 3 for fastening the brick and moved to the brick direction to fix the plate brick 9. Reversely, at the time of turning the cam 5 to the releasing direction, the cam 4 for releasing pushes a stopper part 8 of the brick holding block 2. At the time of further turning the cam 5 to the releasing direction, the brick holding block 2 is moved to the reverse direction of the brick direction and the plate brick 9 comes off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for attaching and detaching a plate brick housed in a metal frame in a sliding nozzle device used for adjusting the flow rate of molten metal when it is extracted from a container.

[0002]

2. Description of the Related Art Conventionally, in such a sliding nozzle device, a mechanism for holding a plate brick in order to attach and detach the plate brick housed in a metal frame is
For example, a mechanism using a linear cotter and a bolt is generally used as described in Japanese Utility Model Publication No. 52-31290, and a pressing mechanism using an eccentric wheel is also proposed in Japanese Patent Application Laid-Open No. 54-152602. Has been done.

In a linear cotter, the impact force exerted on the brick during driving may cause the brick to crack, or the cotter must be installed on the side opposite to the drive source. Must be tightened.

Further, in the bolt pressing, in order to prevent the seizure of the bolt, it is necessary to apply a seizure preventive agent using a special tool when setting the plate brick, which is a troublesome work.

Further, even in the conventional eccentric cam, since the side wall of the brick directly exerts a local restraining force, cracks are generated in the brick, and the space for setting the brick is narrow, so that the rotation position of the eccentric cam is changed. There are drawbacks such as having to check and remove the bricks.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the plate brick attaching / detaching mechanism of the conventional sliding nozzle device, and its purpose is to eliminate variations in tightening between workers and to improve bricks. On the other hand, it is an object of the present invention to provide a detachable mechanism that can secure tightening and releasing without applying an unreasonable impact force and restraining force, and can eliminate work stagnation due to baking of metal during work.

[0007]

In the attachment / detachment device of the present invention, a brick pressing block is provided in the metal frame for accommodating the plate bricks across the width direction at the end face position of the accommodating space for the bricks. It is characterized in that a cam mechanism having two functions, that is, a brick tightening cam and a releasing cam operated by a rotating lever, is provided at the center position of the pressing block.

[0008]

When the plate brick is attached or detached, the holding block acts by the rotational movement of the rotary cam in the sliding direction of the brick, and functions as a brick restraining force.

Further, a cam mechanism provided at the center of the block, which has two functions of a cam for tightening the brick and a cam for canceling the brick, rotates to slide the brick holding block in the tightening and releasing directions. Have a function.

Therefore, a cam mechanism which is provided across the width direction at the end face position of the brick storage space and further has a cam function for tightening the brick and a cam for releasing the brick is provided at the center position of the brick holding block. By rotating with the rotary lever, it acts on the brick pressing block, so the workability is to replace the plate brick with one-touch work, improving the workability seen in conventional bolt pressing. You can

[0011]

1 is a plan view showing the outline of a sliding nozzle device equipped with an attaching / detaching device of the present invention.

In the figure, 1 is a metal frame, 2 is a brick holding block, 3 is a tightening cam, 4 is a releasing cam, and 5
Is a cam, 6 is a rotating shaft, 7 is a block main body, 8 is a holding block, 9 is a mounting portion, 10 is a release projection, 11 is a long hole, 1
2 is a stopper, and P is a plate brick.

FIG. 2 is a plan view of the fixed portion of the brick shown in FIG. 1, and FIG. 3 is a view taken along the line III--III of FIG. 2 and 3 show a state in which the plate brick is tightened.

Reference numeral 1 denotes a mold for accommodating a plate brick. On the center line of the mold 1, two kinds of a brick tightening cam 3 and a releasing cam 4 are provided, and the brick pressing block 2 is tightened and released. A cam 5 to be slid on is attached to a rotary shaft 6 provided in the mold 1.

As shown in the longitudinal sectional view of FIG. 3, the cam 5 is integrally provided with a brick tightening cam 3 and a releasing cam 4 in two upper and lower stages. As shown in FIG. , The brick tightening cam 3 formed in the upper stage has a semicircular single curved surface 3a on its outer peripheral surface and a continuous end surface thereof,
An enlarged surface 3b is formed which expands in a substantially spiral shape. Also,
A spiral enlarged surface 4a having a central angle of about 90 degrees is formed on the outer peripheral surface of the releasing cam 4 shown by a broken line.

Referring back to FIGS. 2 and 3, the brick pressing block 2 includes a block main body 7 provided across the width direction of the mold 1 and a pair of block main bodies 1 extending from the upper and lower ends thereof. The gripping block 8 and the mounting portion 9 to the rotating shaft 6 provided on the opposite side of the gripping block 8 are provided, and a projection 10 for releasing is formed at the tip of the mounting portion 9. On the inner surface side of the tip of the grip block 8, a tapered surface 8a that fits the taper of the plate brick P to be attached is formed. As shown by the broken line in FIG. 2, a long hole 11 having a long axis in the sliding direction through which the rotary shaft 6 is inserted is formed at the center position of the mounting portion 9. The length of the long hole 11 is determined by the stroke of the brick tightening cam 3. 1
Reference numeral 2 denotes a stopper provided so as to project from the mounting portion 9, which prevents the cam 4 from overturning.

Next, the operation of the attaching / detaching device will be described with reference to FIG.

FIG. 5 (a) shows an operating condition during tightening. When the rotary shaft 6 is rotated rightward by a rotary lever (not shown), the enlarged surface 3b of the tightening cam 3 comes into contact with the side surface of the block body 7. By further rotating, the brick pressing block 2 is slid in the direction of the arrow.
As a result, the tapered surface 8a of the grip block 8 is brought into close contact with the tapered surface of the plate brick P, and the plate brick P can be fixed to the brick pressing block 2. At that time, in order to prevent loosening of the brick pressing block 2 after tightening, the brick pressing block causes elastic bending, so that the frictional force against the cam can be maintained during sliding, with a specified force with a torque wrench. It is supposed to be tightened.

On the other hand, when releasing, as shown in FIG. 5B, the cam 5 is rotated counterclockwise about 60 degrees from the state of FIG. The formed spiral enlarged surface 4a comes into contact with the side surface of the projection 10 formed at the end portion and further rotated, so that the brick pressing block 2 is slid in the opposite manner to the above. As a result, the tapered surface 8a of the grip block 8 is separated from the tapered surface of the plate brick P, and the plate brick P is released.

As described above, according to the present embodiment, the plate brick 2 can be tightened and released by one-touch operation using only the rotary lever, so that the operation is simple.
Further, unlike the conventional case, since the bolt is not used, there is no concern about the seizure portion of the rotating portion, and it is not necessary to apply the seizure preventive agent. Further, the pressing force can be easily adjusted with a torque wrench, and the pressing force has less variation among workers, so that an appropriate restraining force for the brick can be maintained.

[0021]

The plate brick attaching / detaching mechanism of the present invention has the following effects.

(1) Since the plate brick can be tightened and released by one-touch work using only the rotary lever, the operation is simple.

(2) Since no bolt is used, there is no concern about seizure at the rotating portion, and it is not necessary to apply an anti-seizure agent.

(3) The installation space of the rotary cam is smaller than that of the bolt retainer and the linear cotter, and the sliding nozzle device as a whole can be made compact.

(4) The pressing force can be easily adjusted with a torque wrench, and the pressing force has less variation among workers, so that an appropriate restraining force for the brick can be maintained.

[Brief description of drawings]

FIG. 1 shows an entire structure of a sliding nozzle device to which a mounting / demounting mechanism of the present invention is applied.

FIG. 2 is a plan view showing details of the attachment / detachment mechanism of the present invention.

FIG. 3 shows details of the attaching / detaching mechanism of the present invention from the line III-III in FIG.

FIG. 4 is a plan view of the cam shown in FIG.

5A is a diagram showing a state when the plate brick is tightened, and FIG. 5B is a diagram showing a state when the plate brick is released.

[Explanation of symbols]

 1 Mold 2 Brick Holding Block 3 Tightening Cam 3a Single Curved Surface 3b Enlarged Surface 4 Release Cam 4a Enlarged Surface 5 Cam 6 Rotating Shaft 7 Block Body 8 Grip Block 9 Mounting Part 10 Release Protrusion 11 Long Hole 12 Stopper P Plate Brick

Claims (1)

[Claims] 1. A metal frame for accommodating a plate brick is provided with a brick pressing block across the width direction at an end face position of a brick accommodating space, and the brick pressing block is operated by a rotary lever at a central position of the brick pressing block. Plate brick attachment / detachment device for a sliding nozzle device equipped with a cam mechanism that has two functions, one for tightening bricks and the other for releasing cams.