JPS6150066B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ladle lid opening/closing device provided separately from the ladle.

Conventionally, in order to prevent heat from escaping from the molten metal in a ladle containing molten metal, a lid body that closes an opening on the top surface of the ladle is attached to prevent heat from escaping and save energy. However, in order to improve the fire resistance of the ladle, fireproofing material is attached not only to the lining of the ladle body but also to the lining of the lid. However, since the lid of the ladle is attached to one side of the ladle so that it can be opened and closed, the heat of the molten metal is directly transferred to the lid, and the lid itself is also deformed by heat, making the lid smooth. As a result, the seal between the lid body and the tray tended to deteriorate. Furthermore, since the opening and closing operations of conventional tray lids are performed directly by the operator, the lid may not be held properly due to the heat and may fall with a bang. The disadvantage was that the refractory material on the lid would fall off, shortening the durability of the lid. In addition, since the ladle is moved around the factory with molten metal inside using a crane, etc., there is a weight restriction, and it is not possible to use enough refractory material for the lining of the lid. It was not possible to improve the heat retention of the Furthermore, in conventional ladle, the temperature of the molten metal falls quickly, so the time required for pouring the molten metal per time is limited.Furthermore, the lid is not airtight, which promotes oxidation of the molten metal. The drawback was that "slag" and "slag" were mixed into the product, resulting in deterioration of quality. In addition, as mentioned above, since the temperature drop of the molten metal is short, the amount of molten metal stored in the ladle was reduced and the pouring work was carried out in such a way that it was used up in a short period of time, so it was difficult to replenish the molten metal in the ladle. This had the disadvantage of poor productivity as the pouring work was interrupted due to the large number of transports required.

In view of such conventional drawbacks, the present invention eliminates weight restrictions by attaching a lid that can be opened and closed to the top opening of the ladle to a tilting frame that is separate from the ladle. It can be used as the lining of the lid to improve the airtightness of the lid, and the ladle can be fixed to the tilting frame at the same time as the ladle lid is opened and closed.
Its structure consists of a pair of first and second outer links whose base ends are each pivoted on a first shaft pivoted on one side of a tilting frame to which a ladle with a spout is removably attached to the rotation axis. A link mechanism for fixing the ladle, and a pair of first and second inner parts whose base ends are pivotally supported on the first shaft in order to open and close the ladle lid, which is attached to the tip of the link mechanism for fixing the ladle. It consists of a link mechanism for opening and closing the ladle lid, and the movement of the support arm for opening and closing the ladle lid is
In order to delay the movement of the fixed arm for fixing the ladle, a special link consisting of a guide plate having a guide groove, first and second operating pieces, and an engagement pin is connected between the rod of the hydraulic cylinder and the first outer link. It is characterized by being interposed between the two.

In this way, the heavy lid lined with refractory material is attached to an opening/closing means attached to a tilting frame separate from the ladle, making it difficult for heat from the ladle to be transferred directly and making it easier to move the ladle. case,
Since the lid remains and only the ladle moves, there are no weight restrictions, the lid can be lined with sufficient fireproof material, and the opening/closing part is located on a tilting frame separate from the ladle. Because there are
It is less susceptible to thermal deformation, and as a result, there is no restriction on the opening/closing operation of the lid, and the temperature drop rate of the molten metal in the ladle is delayed, thereby extending the usable time of the molten metal.

An embodiment of the present invention will be described with reference to the drawings. A pair of mounting bases 2, 2, which are movably mounted on a pair of main rails 1, 1 laid in a factory, are attached to a connecting member 3,
3, and attached to the mounting bases 2, 2 located perpendicular to the main rails 1, 1,
Movable trolleys 6, 6 are mounted on the mounting base 2 and movable trolley 6, respectively, on the mounting base 2 and movable trolley 6, respectively, and driving devices (not shown) for driving the main rail and the auxiliary rail in the longitudinal direction, respectively, are mounted on the mounting base 2 and the movable trolley 6, respectively. . 7
is a substantially L-shaped tilting frame that is mounted on a movable dolly 6, and a connecting portion 8 provided at the rear of this tilting frame 7 is located on the rotation axis 9 of the tilting frame, and is built into the movable dolly 6. It is connected to a rotation device (not shown). Reference numeral 10 denotes a ladle having a spout 11 located on the rotation axis 9 at an eccentric position, and this ladle 10 is removably placed on the tilting frame 7. Reference numeral 12 denotes an arcuate upright wall integrally formed by raising the wall surface of the ladle 10 on the side of the rotation axis 9 in an arcuate manner, and furthermore, a substantially rectangular opening 13 is formed in the upper part of the ladle. 14 is a lid with fireproof material attached to the bottom surface, and the opening 13 of the ladle
It opens and closes.

17 is a vacant space 18 provided on the back side of the tilting frame 7
A first pin 20 is attached perpendicularly to the tip of the rod 19 in the hydraulic cylinder 17, and the tip of the tip bracket 21, which has a second pin 22 at the bottom, is attached to the tip of the rod 19 in the hydraulic cylinder 17. 1 pin 20 is engaged. The first and second pins 20 and 22 can be extended and contracted by the hydraulic cylinder 17 by a full stroke L, a first stroke M, and a second stroke N, respectively. In this case, L=
The relationship is M+N. Reference numerals 23 and 23 denote bearing parts fixed at a fixed interval to the back surface of the tilting frame 7 in the empty chamber 18, and a ladle is fixed to both ends of the first shaft 24 which is pivotally supported by the bearing parts 23 and 23. Boss portions 26, 26 fixed to one ends of a pair of first outer links 25, 25 are pivotally supported, and one ends of second outer links 27, 27 are pivotally connected to the other ends of the first outer links with pins. Reference numeral 28 denotes a first bearing sleeve inserted into the intermediate portion of the first shaft 24, to which one end of a pair of first inner links 29, 29 for opening and closing the tray lid is fixed, and the other end of the first inner links 29, 29 is fixed. The second bearing sleeve 30 is fixed to the
One end of a pair of second inner links 32 is fixed to both ends of the second shaft 31 inserted into the second bearing sleeve 30, and a third bearing sleeve 33 is fixed to the other end of this second inner link 32. The fourth shaft 34 is inserted into the third bearing sleeve 33. In this case, one end of the second actuating piece 66 is pivotally attached to the intermediate portion of the first inner links 29, 29, respectively, with a pin. 35 is a special link having a special guide groove 36, which is fixed to the middle part of this first link 25, and the guide groove 36 has a horizontal groove 3 below.
7, and a diagonal groove 38 is continuously formed diagonally upward from one end of the horizontal groove 37. Reference numerals 40 and 40 denote guide plates that are positioned parallel to the vertical direction on both sides of the hydraulic cylinder 17 and fixed to the back surface of the tilting frame 7, and the second pin 22 that is pivotally supported on the tip bracket is engaged with this guide plate 40. Long grooves 41 are formed in the vertical direction to
1, a vertical groove 42 is formed in the upper part of the extension of this long groove 41, and an arcuate groove 43 having a substantially 1/4 semicircular shape is formed continuously at the lower end of this vertical groove 42. Here, the oblique groove 38 and the vertical groove 42 are formed to have approximately the same length. Reference numerals 65 and 66 denote first and second actuating pieces whose respective ends are pivotally connected by engagement pins 67; one end of the first actuating piece 65 is pivotally supported by the first pin 20; The ends and the intermediate portions of the first inner links 29, 29 are pivotally supported by pins, and a slightly elongated engagement pin 67 is engaged with the longitudinal groove 42 and the arcuate groove 43 of the guide plate 40. There is. Further, the second pin 22 present in the tip bracket 21 is inserted into the elongated hole 4 of the guide plate.
The guide groove 36 of the special link 35 passes through the
is also involved.

Reference numerals 45, 45 denote a pair of mounting parts attached to the top plate 70 of the tilting frame. A support shaft 46 is pivotally supported on the mounting parts 45, 45, and a pair of fixed arms 47, 47 are mounted on both sides of the support shaft 46. Boss part 4 fixed to the root part
8 and 48, and a support shaft 4 is attached to the tip of the fixed arm.
9 is pivotally supported, and furthermore, a hanging plate 7 is provided at the bottom of the fixed arm and protrudes from the tilting frame side of the ladle 10.
1 is fixed to the top plate 70 of the tilting frame. or,
The tips of the upright pieces 47α, 47α raised above the roots of the fixed arms 47, 47 are pivoted to one ends of the second outer links 27, 27 by pins. 62 is a heat reflecting plate attached to the fixed arms 47, 47.
50, 50 is a pair of triangular operation links,
The boss portions 51, 51 fixed to one apex portion and connected by a connecting tube 52 are inserted into the support shaft 46, and further, a shaft 53 is pivotally supported at the other apex portion located at the front, and the boss portion 51 is connected to the apex portion at the rear. The other apex portion and a third bearing sleeve 33 fixed to the second inner links 32, 32 are pivotally supported by a shaft 34. Reference numerals 55 and 55 denote a pair of support arms to which a lid 14 for opening and closing the opening 13 of the ladle 10 is attached at the lower end of the support arms.
55 are connected in parallel by a bearing cylinder 56, and this bearing cylinder 56 is pivotally supported on a support shaft 49 which is pivotally supported at the tips of fixed arms 47, 47. 57, 57 are long connecting links formed in a substantially dogleg shape, and both ends are fixed with shaft bearing cylinders 58, 59, respectively, and one shaft bearing cylinder 5
8 is pivotally supported by a shaft 53 at the front apex portion of the operating links 50, 50, and further, another shaft bearing cylinder 59 and the rear end side of the support arm 55 are pivotally supported by a shaft 60. 8
0 is a mold row arranged linearly along the main rail 1, each having sprues 81, 81. or,
Reference numeral 82 denotes a supply ladle that is suspended by a crane or the like and moved around the factory.

To explain the operation of this embodiment, the tray 1
0 is fixed to the tilting frame 7 and the opening 13 of the ladle is sealed with the lid 14 (FIG. 2), the rod 19 of the hydraulic cylinder 17 is located at the uppermost position. In this state, the tilting frame 7 is rotated by an appropriate amount to pour the metal from the pouring port 11 of the ladle to the sprue 81 of the mold row 80. Next, when replenishing the inside of the ladle 10 with molten metal, the lid 14 is lifted and opened, as shown by the dashed line in FIG. ). Furthermore, when removing the ladle 10 from the tilting frame 7, by lifting the fixing arm 47 for fixing the ladle upward as shown by the two-dot chain line in FIG. 2, the ladle clamp will be released and the ladle can be freely moved. It can be moved. In this case, the lid 14 remains on the tilting frame 7 side.

Next, the opening/closing device for the lid 14 of the ladle will be explained. In the case shown in FIG. 12, the hydraulic cylinder 1
The rod 19 of No. 7 is located at the top as shown in FIGS. From this state, when the rod is lowered by the length of the first stroke shown in Fig. 6M,
The first and second pins 20 and 22 are lowered, and a first actuating piece 65 has one end pivoted on the first pin 20, and a first actuating piece 65 has one end pivoted on the first shaft 24 for a fixed fulcrum attached to the tilting frame 7. An engagement pin 67 that connects the other end of the second actuating piece 66 whose one end is fixed with a pin to the intermediate portion of the inner link 29 also moves down within the vertical groove 42 of the guide plate 40 to the lower end. In this case, since the first pin 20 and the second pin 22 are interlocked by the tip bracket 21, the second pin 22 moves halfway down in the long groove 41 of the guide plate 40 by the stroke M. Further, this second pin 22 also engages with a guide groove 36 of a special link 35, and in addition, this special link 35 has a second pin whose one end is pivotally supported on a support shaft 24 fixed to the tilting frame 7. The second pin 22 is attached to the middle of the first outer link 25, and when the second pin 22 descends downward by the first stroke M, the second pin 22 is attached to the hydraulic cylinder while descending to the lower end of the inclined groove 38 of the guide groove. absorbs the first stroke M of . Therefore, the first outer link 25 is interlocked with the pair of fixing arms 47 for fixing the ladle 10 to the tilting frame 7.
is not lowered, and the fixed frame 47 keeps the ladle clamped (FIG. 12).

On the other hand, the first inner link 29 is connected to one end of the second operating piece 66 via an engagement pin 67 regulated by the guide groove 36 of the special link 35.
Since one end is supported by the support shaft 24, which is a fixed fulcrum, the first stroke M of the hydraulic cylinder is transmitted to the tip of the first inner link 29.
A support shaft 46, which is a fixed fulcrum, is pivotally supported on mounting portions 45, 45 fixed on the top plate 70 of the tilting frame 7 via a second inner link 32 connected to the inner link 29.
The support frame 55 has the lid body 14 attached to the lower part thereof, and the support shaft 49 is a movable fulcrum pivoted on the tip of the fixed arm 47. By rotating the lid body 14 as shown by the dashed line in FIG.
can be released.

Next, the fixing device for the ladle will be explained. When the fixing arm 47 is removed from the ladle 10 following the state shown by the dashed line in FIG. 12, the rod 19 of the hydraulic cylinder 17 is A further second stroke N from the lower end of stroke M
This is done by lowering the That is, Rod 19
When further lowered, the second pin 22 moves to the guide plate 4.
0 to the lower end in the long groove 41 of the special link 35, and the second pin 22 also moves to one end of the horizontal groove 37 of the special link 35 with which the second pin 22 is engaged. It is lifted as shown by the dashed line in Fig. 13 and as shown by the solid line in Fig. 14. In this case, the engagement pin 67 whose one end is pivoted to the first inner link 29 which is a link mechanism for opening and closing the lid of the ladle only moves in an arc within the arc groove 43 of the guide plate 40. 2 stroke N
The first inner link 29 does not descend in proportion to. That is, in the case of the second stroke N, the fixed arm 47
The support arm 55 only rotates, but the support arm 55 hardly rotates. Rather, the operating link 50 and the fixed frame 47 are connected to the second
As shown in the figure, the lid remains in the maximum open state and is only moved further rearward by the fixed frame 47, but the tip of the lid rotates forward to the point of descent and straightens. Since it has the characteristic of being positioned, no unreasonable force is applied to the tilting frame.

Further, although this embodiment has been described with respect to a fan-shaped ladle having a spout at the rotation axis, it is of course applicable to a conventional ladle having a spout at right angles to the rotation axis.

The present invention as described above has the following effects.

Since one hydraulic cylinder has both the function of opening and closing the ladle lid and the function of fixing the ladle to the tilting frame, all operations can be performed with the same switch operation, resulting in good operability.

Since the lid body is attached to a tilting frame that is separate from the ladle so that it can be opened and closed, there is no weight restriction, and sufficient fireproof material can be attached, improving the heat retention of the ladle.

Since the high heat from the ladle is not directly transmitted to the opening/closing means of the lid, thermal deformation is relatively small, and as a result, the opening/closing function of the lid can be made durable.

As long as the lid is closed, the ladle is securely held on the tilting frame, and there is no chance of the ladle falling over due to forgetting to clamp it, so it is safe.

Since the lid body attached to the opening/closing means is easily attached and detached, a lid body suitable for the size of the ladle to be attached to the tilting frame can be used.

The opening/closing of the lid and the clamping of the ladle are carried out smoothly by a hydraulic cylinder at an appropriate speed that suits human operating characteristics, so the operator can use it with confidence, and the movement is smooth and does not cause shock. Because of this, the refractory material attached to the lid can be prevented from falling off, and by preventing troubles due to the refractory material falling off, the heat-resistant life of the lid can be increased.

By improving the sealing performance between the ladle body and lid, it is possible to prevent oxidation of the molten metal, prevent the generation of "slag" and "slag", prevent waste of molten metal, and improve product quality. .

By improving the sealing performance of the lid, the temperature drop of the molten metal is delayed and the molten metal can be used at a higher temperature, improving and stabilizing the quality of the product.

Since the rate of temperature drop of the molten metal in the ladle can be delayed, the molten metal time in the ladle can be extended.Therefore, by increasing the size of the ladle, the number of times it is transported can be reduced and the time required for one pouring operation can be extended. This also makes it possible to significantly improve the production efficiency of cast products.

The operator is safe because the opening/closing of the lid and the clamping of the ladle can all be controlled remotely.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway plan view of the whole, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIG. 3 is a partially omitted view in FIG. 4 is a cross-sectional view of the main parts showing the relationship between the hydraulic cylinder, guide plate, and special link, FIG. 5 is a side view of the tip bracket, and FIG. 6 is an explanatory diagram showing each stroke of the hydraulic cylinder. Figure 7 is a sectional view of the first and second actuating pieces, Figure 8 is a front view of the same, Figure 9 is a front view of the special link, Figure 10 is a sectional view of the same, Figure 11 is a front view of the guide plate, Figures 12, 13, and 14 show the operating states of the ladle fixing device and the ladle lid opening/closing device, respectively. Figure 12 is a front view showing the operating status of the ladle lid opening/closing device, and Figure 13 is the operation of the ladle fixing device. Fig. 14 is a front view showing the ladle fixing device and ladle lid opening/closing device fully open, Fig. 15 is a front view showing the full stroke of the hydraulic cylinder, and Fig. 16 is the ladle fixing device and ladle lid opening/closing device. Main part front view showing the link mechanism of the lid opening/closing device, No. 17
The figures are a partially broken front view showing the link mechanism for the ladle fixing device, Fig. 18 is a side view of the same, Fig. 19 is a partially cutaway front view showing the link mechanism for the ladle lid opening/closing device, and Fig. 20. is a side view, Fig. 21 is a plan view showing each frame for fixing the ladle and opening and closing the ladle lid, Fig. 22 is a sectional view taken along line C-C in Fig. 21,
Figure 3 is a sectional view taken along the line D-D in Figure 21, and Figure 24 is a cross-sectional view taken along the line 2-D in Figure 21.
Figure 1 is a sectional view taken along line E-E, Figure 25 is Figure 23 F-F.
A line sectional view, FIG. 26 is a sectional view taken along the line G-G in FIG. 24,
FIG. 27 is a sectional view taken along the line H--H in FIG. 24, and FIG. 28 is a partially broken front view of the connecting link. 7 is a tilting frame, 10 is a ladle, 14 is a lid body, 17 is a hydraulic cylinder, 20 is a first pin, 22
is the second pin, 24 and 26 are the supporting shafts for the fixed fulcrum, 4
9, 53 are axes for movable fulcrums, 25, 27, 29,
32 is a link, 35 is a special link, 40 is a guide plate, 47 is a fixed arm, 50 is an operation link, 55
is a support arm, and 57 is a connecting link.

Claims (1)

[Claims] 1. A first shaft that is pivotally supported on one side of a tilting frame to which a ladle having a spout at its rotation axis is removably attached.
A pair of first and second parts whose base ends are respectively supported on a shaft.
A link mechanism for fixing the ladle consisting of an outer link, and a pair of first shafts whose proximal ends are pivotally supported on the first shaft in order to open and close the ladle lid, which is attached to the distal end of the link mechanism for fixing the ladle. , a link mechanism for opening and closing the ladle lid consisting of two internal links, and a guide plate having a guide groove in order to delay the movement of the fixed arm for fixing the ladle with respect to the movement of the support arm for opening and closing the ladle lid; A ladle lid opening/closing device characterized in that a special link consisting of first and second operating pieces and an engagement pin is interposed between a rod of a hydraulic cylinder and the first outer link.