JPH10296428A - Device for clamping ladle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ladle damping device without fears of developing the variation of ladle clamping force. SOLUTION: At the time of positioning and laying the ladle 1 into a horizontal shaking table 3, a clamping pin 8 on the shaking table 3 is inserted into a clamping hole formed to a projection 1b of the ladle 1 and clamped it. The clamping pin 8 is pushed and retreated with a piston rod 16 in a cylinder 15 arranged at the outer fixed position of the horizontal shaking table 3, and after shifting the projection 1b of the ladle 1 to near the tip part of the damping pin, the piston rod 16 is retreated and the clamping pin 8 is advanced with the elastic force of a spring material 13 and penetrated into the clamping hole of the projection 1b. While keeping this clamping condition with the elastic force of the spring material 13, the shaking table 3 is tilted 3 and molten metal is poured at the tilting position apart from the cylinder 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladle for holding a molten metal such as pig iron or aluminum supported on a rocking table which can be tilted. The present invention relates to a ladle clamping device that clamps a ladle on a moving bed in a stable posture.

[0002]

2. Description of the Related Art A pouring device for pouring a molten metal into a mold by tilting a ladle containing the molten metal is, for example, a fixed base 2, a rocking base 3, and a ladle clamp device 4 'as shown in FIGS. Is provided.
The swing table 3 can swing between a substantially horizontal fixed position shown in FIG. 7 and an inclined position at the time of pouring shown in FIG. 8 around a support shaft 5 installed at the upper front part of the fixed table 2 at the fixed position. Supported by When the ladle 1 is positioned and placed on the substantially horizontal rocking table 3 from directly above, the ladle 1 is clamped on the rocking table 3 by the ladle clamping device 4 ', and the ladle 1 is left as it is in FIG. As described above, the swing table 3 is inclined integrally with the ladle 1, and the molten metal (not shown) stored in the ladle 1 is poured into the mold.

The rocking table 3 has a rectangular plate-shaped pan mounting portion 3a on which the ladle 1 is positioned and mounted, and a front end portion (right side in FIG. 7) of the pan mounting portion 3a located at a substantially horizontal position in FIG. It has a swinging post 3b extending upward from both ends and connected to the support shaft 5 of the fixed base 2 at the distal end, and a cylinder mounting portion 3c extending upward from the rear end of the pan mounting portion 3a. A plurality of positioning plates 6 for positioning the bottom of the ladle 1 are installed on the pan mounting part 3a, and a ladle clamping device 4 'is installed between the pan mounting part 3a and the cylinder mounting part 3c.

The ladle clamping device 4 ′ includes a clamp claw 20, which is installed on the pan mounting portion 3 a of the rocking base 3 so as to be able to open and close vertically.
And an air cylinder 21 fixed downward to the cylinder mounting portion 3c to open and close the clamp claw 20. The clamp claw 20 is rotatably supported at a substantially central portion by a pin 23 on a claw support 22 fixed on the pan mounting portion 3 a of the swing base 3, and the rear end of the clamp claw 20 faces downward on the air cylinder 21. Is connected to the tip of the piston rod 24.

When the rocking table 3 is at a substantially horizontal position, high-pressure air is sent to one of the claw opening hoses 25 of the air cylinder 21 of the ladle clamping device 4 ', and the piston rod 24
Protrudes downward as shown by the chain line in FIG.
0 is opened and the ladle 1 is placed on the pan mounting portion 3a of the rocking table 3 from directly above.
Is supplied by a crane or the like and positioned and mounted. In this case, the ladle 1 integrally has a projection 1c protruding toward the clamp claw 20 at the rear end of the bottom portion, and when the ladle 1 is placed on the swing table 3, a high pressure is applied to the air cylinder 21. The supply of air is switched to the other claw closing hose 26, the piston rod 24 retreats upward as shown by the solid line in FIG. 7, the clamp claw 20 rotates clockwise, and the tip end is taken off. The protrusion 1c of the pan 1 is pressed toward the pan mounting portion 3a. By this pressing, the ladle 1 is firmly clamped to the pan mounting portion 3a of the rocking base 3.

While maintaining the state in which the ladle 1 is clamped to the rocking base 3 by the clamp claws 20, the rocking base 3 is swung up and down on the support shaft 5 as a fulcrum, and as shown in FIG. 1 is tilted together with the rocking table 3, and the molten metal is poured into the mold from the molten metal outlet 1 a of the ladle 1. When the pouring is completed, the rocking table 3 and the ladle 1 are returned to the original substantially horizontal fixed position, the clamp claws 20 are opened, and the ladle 1 is taken out from the rocking table 3 directly above.

[0007]

In order to prevent the ladle 1 from dropping from the inclined rocking table 3 at the time of pouring in FIG.
The protrusion 1c of the ladle 1 is pressed by the clamp claw 20,
This pressing force depends 100% on the high-pressure air supplied to the claw closing hose 26 of the air cylinder 21. Therefore, if the high-pressure air is constant and stable, the clamping force of the ladle 1 on the rocking table 3 is stable, but the air cylinder 2
If a trouble occurs in the high-pressure air supply system such as a failure of the high-pressure air switching valve to 1, the clamping force of the clamp claw 20 fluctuates.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a ladle clamping device which does not cause a variation in the ladle clamping force.

[0009]

According to the present invention, a ladle is positioned and supported in a substantially horizontal posture, and when the ladle is tilted, the ladle is tilted in a fixed direction together with the ladle. A device for clamping a ladle so that it does not fall off the rocking table, which is removably inserted into a clamp hole formed at an end of the ladle supported by the rocking table in a direction opposite to the inclination direction. A clamp pin, a pin support fixed on the rocking table and supporting the clamp pin so that the clamp pin can reciprocate in the axial direction, and constantly applying an elastic force to the clamp pin in the axial direction against the pin support so that the clamp pin is A spring material that is inserted into the clamp hole of the ladle on the rocking table and holds the locked state, and a clamp pin of the substantially horizontal rocking table that is installed at a fixed position outside the substantially horizontal rocking table. Appropriately applying an external force against the elasticity of the spring material, the clamp pin is used to With the configuration and a cylinder to pull the pump bore, it is to achieve the above object.

[0010] Here, the clamp hole of the ladle is a through hole formed in a substantially horizontal direction on a protrusion protruding from the bottom rear end of the ladle.
When the ladle is positioned and mounted on a substantially horizontal rocking table, a clamp pin parallel to the rocking table is removably fitted into a clamp hole of the ladle. The clamp pin is locked to both the pin support fixed to the swing table and the clamp hole of the ladle,
The ladle is clamped on the rocking table. This clamp is firmly maintained by the elasticity of the spring material between the clamp pin and the pin support, and the clamp is released only by the cylinder outside the rocking table when the rocking table is at a substantially horizontal position. And forcibly pulling it out from the clamp hole of the ladle. Therefore, when the rocking table is tilted, the clamp pin is located at a position away from the cylinder, and the clamped state by the locking of the clamp pin and the clamp hole of the ladle is stably maintained regardless of the malfunction of the cylinder. The danger of the ladle falling off is reliably avoided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. This embodiment is applied to the pouring apparatus shown in FIGS.
The same or corresponding parts are denoted by the same reference numerals and description thereof will be omitted.

The ladle 1 is positioned and mounted on a fixed base 2 via a support shaft 5 so as to be swingable in the front-rear direction, and is always positioned on a substantially horizontal swing base 3. The ladle clamping device 4 described below of the present invention is installed in a pouring device for pouring the molten metal accommodated in the ladle 1 into a mold by rotating upward with the fulcrum as a fulcrum.

FIGS. 1 and 2 show a specific example of the ladle clamping device 4. FIG. Assuming that the horizontal direction in which the rocking table 3 rocks is the X direction and the horizontal direction orthogonal to the X direction is the Y direction, the ladle clamping device 4 is mounted on the pan mounting portion 3a of the substantially horizontal rocking table 3. A pair of pin supports 11 and 12 fixed to the rear part (the left side in FIG. 1) in parallel in the X direction and two pairs of upper and lower pin supports 11 and 12 slidably penetrating in the Y direction; The spring member 13 is compressed and inserted between one of the pin supports 11 and 12 and one end of the guide shaft 9, and is fixed in the Y direction to the fixing table 2 extending in the extension direction of the one end of the guide shaft 9. A cylinder, for example, an air cylinder 15. Corresponding to the ladle clamping device 4, as shown in FIGS. 3 and 4, a clamp hole 7 penetrating in the Y direction is formed in a projection 1b integrally projecting from the rear end of the bottom of the ladle 1. Is done. Ladle 1 is inserted by inserting clamp pin 8 into clamp hole 7.
Is clamped to the rocking table 3.

When the swing table 3 is at a substantially horizontal fixed position, the ladle 1 containing the molten metal is positioned and placed on the ladle positioning plate 6 on the ladle mounting portion 3a. A thick plate-shaped projection 1b projecting from the bottom rear end of the ladle 1 is located at a height position slightly separated from the pan attachment part 3a, and a pair of pin supports 11, 12 are provided near both side surfaces of the projection 1b. Are opposed in parallel. The pair of pin supports 11 and 12 are a two-axis bearing body having a through hole through which the clamp pin 8 is slidably inserted and an through hole through which the guide shaft 9 is slidably inserted. Then, the clamp pin 8 is supported at the height of the clamp hole 7 of the ladle 1, and the guide shaft 9 is supported at the height between the projection 1b of the ladle 1 and the pan mounting portion 3a.

2 and 4, if the left side of the clamp pin 8 and the guide shaft 9 is the rear end and the right side is the front end, the clamp pin 8 and the rear end of the guide shaft 9 are connected by a connecting plate 10 to be integrated. Be transformed into When the clamp pin 8 and the guide shaft 9 penetrate the pair of pin supports 11 and 12, the guide shaft 9 is moved from the one pin support 12 at each end thereof to the clamp pin 8
A spring material 13 of a compression spring is mounted between the pin support 12 and the flange 14 fixed to the tip of the guide shaft 9 so as to protrude longer. The spring member 13 urges the guide shaft 9 to resiliently press the guide shaft 9 toward the distal end thereof, and the elastic bias toward the distal end is also urged to the clamp pin 8 via the connecting plate 10. You.

An air cylinder 15 is installed coaxially with the guide shaft 9 on the fixed base 2 which is an extension of the axis of the guide shaft 9. The tip of the piston rod 16 of the air cylinder 15 faces the flange 14 at the tip of the guide shaft 9. Normally, the air cylinder 15 retracts the piston rod 16 to a position where it does not hinder the swing of the rocking table 3, and holds the piston rod 16 only when the ladle 1 is clamped or released from the rocking table 3. The operation of clamping and release of the ladle 1 is performed as follows.

When positioning the ladle 1 containing the molten metal in the pan mounting portion 3a of the substantially horizontal rocking table 3, the piston rod 16 is protruded by the air cylinder 15 as shown in FIG. The protruding piston rod 16 presses the flange portion 14 at the tip of the guide shaft 9 in the Y direction, and retreats the integrated body of the guide shaft 9, the connecting plate 10, and the clamp pin 8 in the Y direction against the elasticity of the spring material 13. Let it. A pair of pin supports 11, 1
When the distal end of the clamp pin 8 retreats to a space m where the protrusion 1b of the ladle 1 is formed in the middle portion of the ladle 2, the projection of the piston rod 16 stops, and the state of FIG. 4 is maintained. In this state, the ladle 1 is positioned and mounted on the pan mounting portion 3a, and the projection 1b is disposed in the space m between the pair of pin supports 11 and 12. The ladle 1 on the pan attachment part 3a is detected by, for example, a ladle presence / absence sensor 17 arranged on the side of the pan attachment part 3a shown in FIG. The piston rod 16 is retracted.

The air cylinder 15 uses a piston rod 16
Is retracted to the original home position, the guide shaft 9 moves forward in the Y direction by the elastic force of the spring material 13, the clamp pin 8 also moves forward in the Y direction via the connecting plate 10, and the clamp hole 7 of the projection 1b is moved. And the pin support 12. The forward movement of the clamp pin 8 and the guide shaft 9 by the spring material 13 is performed to a fixed position where the clamp pin 8 reliably penetrates the pair of pin supports 11 and 12 as shown in FIG. 2, and this state is maintained. You. A pin-in confirmation sensor 18 shown in FIG. 1, for example, detects the position of the distal end of the guide shaft 9 when the clamp pin 8 passes through the pair of pin supports 11 and 12 without fail. The pin-in confirmation signal of the sensor 18 indicates that the clamp pin 8 is locked by passing through the clamp hole 7 of the protrusion 1b.
Is also used as a signal for confirming that the ladle 1 is securely clamped to the rocking table 3, and this confirmation signal is used as a signal to confirm that the ladle 1 is securely clamped to the rocking table 3. Starts swinging and the pouring operation is started.

As shown in FIG. 5, when the swing table 3 swings up and swings around the support shaft 5, the ladle 1 also swings up integrally with the swing table 3 and is housed therein. The molten metal is poured into a mold. At this time, since the projection 1b of the ladle 1 is firmly clamped to the swing table 3 by the clamp pin 8 and this state is maintained by the spring material 13, the air cylinder 1
Even if a trouble or the like occurs in the high-pressure air supply system 5 or the air cylinder 15 malfunctions, there is no possibility that the clamping force fluctuates.

When the pouring is completed, the swing table 3 is returned to the original horizontal position, and the piston rod 1 is moved by the air cylinder 15.
6, the guide shaft 9 retreats against the elasticity of the spring material 13, and the clamp pin 8 also retreats, and the protrusion 1 of the ladle 1
The clip is released from the clamp hole 7 of FIG.

The present invention is not limited to the above embodiment, and various modifications are possible. For example, the guide shaft 9 guides the forward and backward movement of the clamp pin 8 so that the clamp hole 7 of the ladle 1 can be moved.
Although it was arranged to make the insertion / removal operation stable, the spring material for positively inserting the clamp pin into the clamp hole of the ladle was attached to the clamp pin itself (not shown),
An arbitrary portion of the clamp pin can be directly pressed by a rod of a cylinder and pulled out from a clamp hole of a ladle.

[0022]

According to the present invention, when pouring the tilting table, the clamp pin attached to the tilting table is inserted into the clamp hole of the ladle, and the ladle is firmly clamped to the tilting table. Since it is in the state and this state is maintained by the spring member, the clamp of the ladle is always stably and surely maintained even if a failure or malfunction of the cylinder occurs.

[Brief description of the drawings]

FIG. 1 is a plan view of a pouring device including a ladle clamping device according to an embodiment of the present invention.

FIG. 2 is a partial rear view including a partial cross section of the apparatus in FIG. 1;

FIG. 3 is a sectional view taken along the line AA of FIG. 1;

FIG. 4 is a partial rear view including a partial cross section when the ladle is detached from the apparatus in FIG. 2;

FIG. 5 is a cross-sectional view including a part that is partially omitted when pouring in the apparatus of FIG. 3;

FIG. 6 is a plan view of a pouring device provided with a conventional ladle clamping device.

FIG. 7 is a side view of the swing table taken along the line BB in FIG. 6;

FIG. 8 is a side view of the apparatus shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ladle 3 Rocking table 4 Ladle clamp device 7 Clamp hole 8 Clamp pin 11 Pin support 12 Pin support 13 Spring material 15 Cylinder

Claims (1)

[Claims] 1. A ladle that is positioned and supported in a substantially horizontal position and tilts in a fixed direction during pouring. When the ladle is tilted, the tilted ladle falls off the rocker. A clamp pin that is inserted into and removed from a clamp hole formed at the end of the ladle supported by the rocking table in the direction opposite to the tilt direction, and that is fixed on the rocking table. A pin support for supporting the clamp pin so as to be able to reciprocate in the axial direction, and a clamp hole of a ladle on the rocking table by constantly urging the clamp pin axially against the pin support in the axial direction. And a spring material which is held at a fixed position outside of a substantially horizontal rocking table, and which has an external force against a resilient force of the spring material. And a cylinder that removes the clamp pin from the clamp hole of the ladle by urging Ladle clamping device, characterized in that the.