JPH0217741Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a tilting device for a ladle that receives molten metal from a melting furnace, and in particular a support bracket that fixes the tilting bracket to the ladle body when the ladle is overturned. This invention relates to a device that prevents the device from coming loose and falling off.

Prior Art A ladle is generally provided with a tilting device 1 as shown in Fig. 4, and a crane hook is hung on an eye rod 2 to lift the ladle 7 around the trunnion, thereby tilting the molten metal. After pouring the molten metal, the ladle is placed on a tipping stand and fixed at an angle of 180 degrees in order to remove the base metal and residue adhering to the inner walls of the ladle. Using 3 as a fulcrum, it turns downward and tries to fall. In order to prevent this, conventionally a toggle pin 5 is attached to the hook-shaped support bearing 4.
This prevents the eyelid support shaft 6 from coming off from the support bearing 4.

In such equipment, the toggle pin is installed after the rigging operator has lowered the ladle to a position within reach while communicating with the crane operator, and after inserting the toggle pin, the ladle must be lowered again. The device is rolled up and fixed on a tipping table, so conventional devices have the following problems: (1) It is necessary to raise and lower the ladle to attach the toggle pin, and (2) When the toggle pin is inserted, it sticks to the ladle. (3) The toggle pins tend to be bent and damaged, making it difficult to insert them.

In order to solve the above problem, the present applicant previously proposed the following device for preventing the ladle tilting fitting from falling off in Utility Model Application No. 33720/1983. This device is the fifth
As shown in the figure, a pair of fixing metal fittings 9 are fixed to the outer wall of the ladle 7 at appropriate intervals, each having a hook-shaped support bearing 4 for fitting and supporting the support shaft of the eye rod 2, and Holding fittings 10 supported by the outer walls of the fixing fittings 9 and extending laterally in parallel with the side walls, and a crank 11 rotatably supported on the free end of the holding fittings 10, each having a substantially elliptical shape; A receiving metal fitting 13 is fixed to the crank pin at the eccentric position, and has a recess 12 in which the support shaft 6 is fitted in the part opposite to the fixed position of the pin, and the ladle is placed and fixed on the tipping table. Then, when the trunnion 8 is rotated 180 degrees, the receiving bracket 13
The ladle is maintained in the same position with the concave portion 12 facing upward, and as the ladle falls over, the support shaft 6 gradually moves to the concave portion 12 of the receiving fitting 13 and is held in the concave portion 12. It is something that exists.

However, even the above-mentioned device is not always satisfactory; for example, (1) since the crank 11 is in a cantilevered state, it is easily deformed and smooth rotation may be impaired; (2) in the event of a fall, the weight of the eye rod 2 is transferred to the receiving bracket. 1
In addition to #3, there were other problems such as difficulty in smooth operation.

Problems to be Solved by the Invention The object of the invention is to provide a device for preventing the ladle tilting fitting from falling off, which can solve the above-mentioned problems.

Means for Solving the Problem According to the present invention, there is a fixing metal fitting fixed to the ladle, a stopper shaft rotatably and slidably fitted to the metal fitting, and a stopper shaft that can be moved by tilting the ladle. It consists of a rotating means for rotating with respect to the fixing bracket, a slider, and a cam, and as the stopper shaft rotates with respect to the fixing bracket, the slider moves along the cam, and the stopper shaft is moved away from the fixing bracket. The stopper shaft protrudes to the side of the tilting metal fitting to function as a stopper to prevent rotation of the metal fitting when the stopper shaft moves forward and backward, and the stopper shaft functions as a stopper to prevent the rotation of the metal fitting when moving backward, and the device releases the function as a stopper when moving backward. is provided.

Here, a preferred example of the rotating means is a weight fixed to the stopper shaft at an eccentric position.

The cam may be of any form; for example, when using an end cam, the stopper shaft is biased in one direction with a spring or the like so that the slider is pressed against the cam, but the structure can be simplified. In order to achieve this, it is preferably formed into a groove shape or a protrusion, and the slider is fitted into this so that it moves only along the cam.

The cam is also preferably symmetrical and is formed so that the stopper shaft moves forward and backward as the ladle rotates either toward the ladle tilting fitting or toward the opposite side.

Embodiment In FIGS. 1 and 2, each fixture 9 fixed to the outer wall of the ladle 7 has a flange pipe 15 on its outer surface.
is fixed so as to protrude laterally, and a stopper shaft 16 is rotatably and slidably fitted through the flange pipe 15 and the fixture 9. A weight 18 is fixed to the end of the stopper shaft 16, and the weight 18 is fixed to the stopper shaft 16 at an eccentric position, so that the center of gravity is always located below the stopper shaft, and its line of action is aligned with the axis of the stopper shaft. It has the function of acting to pass through. The flange pipe 15 is provided with a substantially V-shaped curved cam groove 19 that is symmetrical in the axial direction, and a slider 20 is slidably fitted into the groove.
is rotatably supported on the stopper shaft 16.

FIG. 3 shows that the cam groove 19 is formed on the stopper shaft 16 instead of on the flange pipe 15, and the cam groove 19 is formed on the stopper shaft 16.
A ball 22 that fits into the flange tube 15 is held down by a bolt 23 screwed into the flange tube 15, and as the flange tube 15 rotates, the stopper shaft 16 moves forward and backward within the flange tube.

In the above embodiment, a cam groove is formed in either the flange pipe 15 or the stopper shaft 16, and the ball or slider that fits into the cam groove is supported by the other, and the stopper shaft 16 is moved back and forth by rotation of the flange pipe. However, in addition to the above, there are also fixing metal fittings 9.
Any structure may be used as long as the stopper shaft 16 moves forward and backward as the stopper shaft 16 rotates relative to the stopper shaft 16.

Operation When pouring the molten metal in the ladle, the crane hook (not shown) is hooked to the eye rod 2 and lifted up, similar to the known method. As a result, the support shaft 6 of the eye rod 2 is first lifted up from the support bearing 4 of the fixture 9, and then the ladle 7 is tilted to the opposite side of the eye rod 2 around the trunnion, and is spaced laterally from the eye rod lifted by the crane.
When the ladle 7 is tilted, the weight 18 rotates so that the line of action of its center of gravity coincides with the axis of the stopper shaft 16. Therefore, the stopper shaft 16 moves forward while rotating inside the flange pipe 15 and protrudes from the fixing fitting, but at this time, since the ladle is tilted and is away from the eye rod, the tip of the stopper shaft comes to protrude inside the eye rod. There is no problem in tilting the ladle. After pouring the molten metal, the crane is lowered to return the ladle to its original state, i.e., the state where the ladle is upright.The end of the stopper shaft is retracted into the fixing fitting 9, so the ladle returns to the direction closer to the eye rod. There will be no problem in doing so.

Next, in order to discharge the remaining hot water, residue, etc. that adhered to the inner wall of the ladle, etc., the ladle 7 is placed and fixed on a tipping table (not shown), and when it is rotated 180 degrees around the trunnion, the eye rod 2 also moves to the support shaft 6. is fitted into the support bearing 4 of the fixture 9 and rotates together with the fixture 9, that is, the ladle 7. As the ladle rotates, the stopper shaft 16 moves forward inside the flange pipe due to the action of the weight 18 while rotating in the same manner as described above, but since the eye rod also rotates as one with the ladle, the stopper shaft 16 moves forward in the opposite manner to the above. The tip of the shaft comes to protrude outside of the eye rod 2. Therefore, the eye rod 2 is prevented from moving downwardly by the stopper shaft 16, and does not fall off. As mentioned above, the ladle is centered around the trunnion.
It rotates 180 degrees, but when it rotates 90 degrees, the slider 20
reaches the end of the cam groove 19, and even if the ladle rotates further, it remains at the end of the cam groove, and the stopper shaft is maintained in a protruding state.

The direction in which the ladle is toppled is either to the eye rod side or to the opposite side depending on the part of the ladle that has residue etc. attached to it, but since the cam groove is symmetrical in the axial direction of the approximately V shape, it is possible to The stopper shaft also moves forward and backward in the direction of rotation to perform the above-mentioned action.

Effects of the invention As described above, in this invention, when the ladle falls over, the stopper shaft moves forward and functions as a stopper to prevent the tilting bracket from rotating, thereby causing the pivot of the tilting bracket to separate from the support bearing. This system is designed to prevent the tilting bracket from falling off, which eliminates the need for workers and improves work safety compared to the conventional method, which uses toggle pins to prevent the pivot from falling off. At the same time, the waiting time for inserting pins is eliminated, and the working time can be shortened. Moreover, compared to the device shown in FIG. 5 proposed earlier by the present applicant, in which the weight of the tilting bracket is applied to the receiving bracket when it falls, the tilting bracket, which is suspended by its own weight, has a stopper shaft that protrudes to the side. Since the stopper shaft does not act at all, or if it does act, it is only pressed relatively lightly, the stopper shaft can move relatively smoothly.

[Brief explanation of drawings]

Figure 1 is a perspective view of the ladle tilting device, and Figure 2 is a perspective view of the ladle tilting device.
FIG. 3 is a partially cutaway perspective view of a modified version, FIG. 4 is a side view of a conventional device, and FIG. 5 is a perspective view of another example. 2...Irod, 4...Support receiver, 6...Irod support shaft, 7...Ladle, 8...Trunion,
9...Fixing metal fittings, 15...Flanged pipe, 16...
Stopper shaft, 18... Weight, 19... Cam groove,
20...slider, 22...ball, 23...bolt.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A fixture that is fixed to the ladle, a stopper shaft that is rotatably and slidably fitted to the fixture, and a fixture that fixes the stopper shaft by tilting the ladle. The stopper shaft is made up of a rotating means for rotating relative to the fixture, a slider, and a cam, and as the stopper shaft rotates relative to the fixture, the slider moves along the cam, moving the stopper shaft forward and backward from the fixture. When the stopper shaft moves forward, the stopper shaft
A drop-off prevention device for a ladle tilting metal fitting that protrudes to the side of a tilting metal fitting and functions as a stopper to prevent rotation of the metal fitting, while releasing the function as a stopper when the metal fitting is retreated. (2) The falling-off prevention device for a ladle tilting fitting according to claim 1, wherein the rotating means is a weight. (3) The falling-off prevention device for a ladle tilting fitting according to claim 1, wherein the cam is in the form of a groove or a protrusion. (4) The falling-off prevention device for a ladle tilting fitting according to claim 1 or 3, wherein the cam is formed in a symmetrical shape.