JP2008170403A - Weighing device, and containing body support device provided with weighing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent fluctuation to allow accurate weighing, irrespective of a transverse force acting via a containing body charged with molten metal. <P>SOLUTION: This weighing device is provided with a saddle 32 for receiving a shaft part 83 of a tundish 80 capable of charging the molten metal, at least one pair of weighing devices 31 for supporting the saddle 32 under a condition aligned on one line from an under side and for weighing the tundish, and a casing for storing the saddle 32 and the weighing devices 31. The saddle 32 is provided with a pair of planar planes 44 for forming a pair of side faces, and regulating means 51 for regulating the fluctuation of the saddle 32 inside the casing 30 are arranged between the pair of respective planar planes 44 and the casing 30. The regulating means 51 are arranged in three portions not to align contact bodies 52 contacting with the saddle 32 on the same straight line with respect to the respective planar planes 44 of the saddle 32. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a weighing device that weighs the weight of a container such as a tundish or a ladle in which molten metal such as molten steel is charged in a continuous casting facility, and a container support device including the weighing device.

Conventionally, the continuous casting equipment has a tundish arranged below the ladle, a mold is arranged below the tundish, and a secondary cooling zone comprising a plurality of support rolls and cooling sprays is provided below the mold. It is known that a drawing device is provided at the rear end of the secondary cooling zone.
Further, the tundish is mounted on a tundish car (traveling carriage) and conveyed to the tundish car so as to be disposed below the ladle and above the mold.
In the continuous casting facility, molten steel charged in a ladle is poured into a tundish and then poured into a mold by a nozzle at the bottom of the tundish. Then, the liquid molten steel is solidified in the mold and pulled out from below, cooled by a secondary cooling zone, and then cut into a desired size. As a result, a slab such as bloom is produced.

  As casting proceeds in this way, the remaining amount of molten steel in the tundish gradually decreases. If the casting is continued as it is, there is a risk that the noro generated on the molten steel surface in the tundish will flow toward the mold and the noro may be mixed into the molten steel in the mold. Mixing of Noro into the mold leads to deterioration of the slab quality. For this reason, it is necessary to stop the pouring from the tundish toward the mold immediately before noro flows out (noro outflow limit). The noro spill limit depends on the residual molten steel height in the tundish, so if the weight of the residual molten steel can be accurately grasped, the pouring can be stopped immediately near the no spill limit and the no Can be prevented and the amount of residual molten steel can be reduced. On the other hand, if the weight of the residual molten steel cannot be accurately grasped, the pouring must be stopped in spite of a sufficient margin up to the noro spillage limit, resulting in a decrease in yield. For this reason, in recent years, it is required that the error range be within ± 0.1% of the tundish weight when the molten steel of the tundish is full as the weighing accuracy of the tundish.

As a device for measuring the weight of a tundish, Patent Document 1 discloses that a tundish placing device is accommodated in an upper notch portion of a traveling carriage, and includes four load cells arranged on the upper surface of the upper notch portion. Is supported from below, and is supported from the side of the tundish placing device by a check rod provided on the side surface of the upper notch.
Japanese Patent No. 2501145

  However, according to the configuration of Patent Document 1, a plurality of check rods are arranged on the same plane. For this reason, if the number of load cells is reduced to two or arranged on a straight line in order to save space, the support state of the tundish mounting apparatus becomes unstable. Therefore, when a lateral force along the axial direction of the axial portion of the container acts on the tundish mounting device due to the contraction of the tundish accompanying the decrease in the heat capacity due to the decrease in the amount of residual molten steel, the tundish mounting device is There is a problem in that a rotation axis is generated on a plane formed by the check rod, so that the rotation axis easily fluctuates and it is difficult to perform high-precision weighing as described above.

  Accordingly, the present invention provides a weighing device that prevents wobbling and enables accurate weighing despite a lateral force acting through a container charged with molten metal, and a container equipped with the weighing device. A support device is provided.

In order to achieve the above object, the present invention takes the following technical means.
That is, the technical means for solving the problems in the present invention are:
A plurality of support devices for supporting each of the plurality of shaft portions of the container capable of charging the molten metal, and each support device has a saddle for receiving the shaft portion of the container and the saddle in a state of being aligned in a row; And at least a pair of weighers for supporting and weighing the container, and a casing for housing the saddle and the weigher, and between the saddle and the casing, the saddle in the casing. In the weighing device in which the regulation means to regulate the fluctuation of the
The saddle includes a pair of side surfaces facing each other across a straight line connecting the centers of the weighers arranged in a row, and the restricting means is disposed at a position facing each of the pair of side surfaces of the saddle. At least three places that do not line up on the same straight line
Each contact body includes a saddle side contact portion that can make point contact with the saddle, and a case side contact portion that can make point contact with the casing, and the saddle side contact portion in the saddle sinking direction centering on the case side contact portion. It is arranged between the saddle and the casing in a swingable state.

In addition, other technical means for solving the problems in the present invention are:
A plurality of support devices for supporting each of the plurality of shaft portions of the container capable of charging the molten metal, and each support device has a saddle for receiving the shaft portion of the container and the saddle in a state of being aligned in a row; And at least a pair of weighers for supporting and weighing the container, and a casing for housing the saddle and the weigher, and between the saddle and the casing, the saddle in the casing. In the weighing device in which the regulation means to regulate the fluctuation of the
The saddle includes a pair of side surfaces facing each other across a straight line connecting the centers of the weighers arranged in a row, and the restricting means is disposed at a position facing each of the pair of side surfaces of the saddle. At least three places that do not line up on the same straight line
Each contact body includes a saddle side contact portion that enables a line contact perpendicular to the sinking direction of the saddle, and a case side contact portion that can make a line contact with the casing similarly to the saddle side contact portion. The saddle-side contact portion is disposed between the saddle and the casing so as to be swingable in the saddle sinking direction with the contact portion as a central axis.

  According to this, when the shaft portion of the container is placed on the saddle, the weigher slightly sinks, and accordingly, the saddle also slightly sinks (displaces). Here, each contact body of the regulating means provided to maintain the posture of the saddle in a stable state is in point contact or line contact with the side surface of the saddle (hereinafter referred to as “contact”). ) As described above, it is arranged so that it can roll as the saddle sinks. For this reason, even when the saddle sinks in a state in which the contact body is in contact with the side surface of the saddle, the contact body in contact with the saddle sinks to roll, and the contact body and the saddle There is no sliding resistance between them. As a result, most of the load on the container is transmitted to the weigher without receiving resistance from each contact body, and the weight of the container can be measured with extremely high accuracy.

By the way, the regulating means regulates the fluctuation of the saddle in the casing and maintains the saddle posture in a stable state. In the case where the saddle fluctuates, for example, the heat capacity of the container decreases due to the discharge of the molten metal charged in the container, and the container (shaft part) contracts due to this, and thereby a lateral force acts on the saddle. It is assumed that In this case, the saddle rolls very slightly and then contacts the three contact bodies. Alternatively, when all of the contact bodies are in contact with the saddle from the beginning, the saddle does not wobble at all.
Here, the arrangement of the contact body with respect to each side surface of the saddle is a triangular shape that does not line up on the same straight line. For this reason, when all of these three contact members contact the saddle, the saddle is not only restricted in lateral movement but also in rotation by the three contact members.

That is, when any two of the three contact bodies are in contact with the saddle, the saddle is restricted from further lateral movement by the two contact bodies, but the two contact bodies are connected. The saddle can be rotated around a straight line. In the weighing device of the present invention, when the contact body that is not on the straight line further contacts the saddle, even its rotation is restricted.
Of course, when each contact body of the regulating means is not in contact with the saddle, all the load from the container transmitted to the saddle is transmitted to the weigher, and the load of the container can be accurately measured. Become.

Further, the saddle is formed in a flat plate shape and is placed on the weigher with a pair of flat plate surfaces as the pair of side surfaces, and each contact body of the restricting means on each of the pair of flat plate surfaces Are preferably opposed or in contact with each other through a slight gap.
According to this, the thickness of the saddle can be formed to be approximately the same as the size of the weigher in the width direction, and space saving of the entire weighing device can be achieved.
Moreover, it is preferable that each contact part of the said contact body is formed in the convex circular arc shape.
According to this, only the top part of the front-end | tip of a contact part contacts a saddle or a casing, and a contact body can make a mutual contact part very few. For this reason, the resistance generated between the saddle and the casing and the contact body due to the fine movement of the saddle in the casing does not occur as a sliding resistance by bringing the contact portion of the contact body into surface contact with the saddle, and the contact portion. It is received by the turning motion (swinging motion) of the contact body in which only the top portion of the tip is brought into contact with the saddle or the casing. As a result, the resistance force generated between the contact body and the saddle and the contact body and the casing caused by the contact between the contact body and the saddle can be significantly reduced.

Strictly speaking, the contact portion where the top of the contact portion of the contact body comes into contact with the saddle or the casing is elastically deformed by the compressive force generated between the saddle or the casing and the contact body due to the lateral movement. The area is as follows. However, since the area can be made small by adopting the above-described configuration, the restricting means only bears a very small load, whereby the weight of the container can be accurately measured by the weigher. It can be done.
Further, the saddle is formed with a saddle side receiving portion that receives the saddle side contact portion of the contact body, and the casing is formed with a case side receiving portion that receives the case side contact portion of the contact body. It is preferable that any one or both of these are recessed.

Thereby, a contact body will be arrange | positioned between these casings and a saddle in the state embedded in the any one or both of a casing and a saddle. For this reason, the length of the casing in the direction in which these contact bodies are arranged can be shortened, and space saving can be achieved.
The saddle side receiving part of the saddle and the case side receiving part of the casing are provided with contact pieces that contact the contact parts of the contact body, and the contact pieces and the contact parts of the contact body. Is preferably formed with high strength.

According to this, since the contact pieces formed with high strength and the contact portion come into contact with each other, the contact area between the contact pieces and the contact portion becomes extremely small. As a result, the rolling resistance generated between the contact body and the saddle or casing can be further reduced.
The restricting means includes at least one contact body that can contact the opposite end portions at positions facing both end portions of the saddle located in the direction of extension of a straight line connecting the centers of the weighers arranged in a row. It is preferable to be provided in the place.
According to this, the wobbling of the saddle in the linear direction can also be prevented by the restricting means.

In addition, another technical means for solving the problems in the present invention is characterized in that the container support device includes the weighing device and a position adjusting device capable of adjusting the position of the weighing device.
According to this, even when the container is supported by the weighing device, the position of the container can be adjusted by adjusting the position of the weighing device with the position adjusting means. Further, the weighing device and the position adjusting means can be formed as separate components, and not only can the assembly of the container support device be simplified, but also the complexity of the mechanism of the container support device can be avoided. It becomes.

  Further, the position adjusting means is either one of a horizontal position adjusting means capable of adjusting a horizontal position of the weighing device and a vertical position adjusting means capable of adjusting a vertical position perpendicular to the horizontal direction, or It is preferable to have both.

  According to the weighing device and the container support device including the weighing device according to the present invention, accurate weighing can be achieved by preventing wobbling even though a lateral force acts through the container in which the molten metal is charged. Is possible.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIGS. 1-7 has shown 1st Embodiment of the container support apparatus which mounts the weighing apparatus 1 based on this invention, In the said 1st Embodiment, the tundish (container) 80 is used as a container support apparatus. A tundish car 2 that is mounted and transported is employed.
As shown in FIGS. 1 and 2, the tundish car 2 is configured by mounting a tundish mounting device 4 on an upper part of a vehicle body 3.
The tundish 80 includes a main body 81 having an open upper portion that accommodates molten steel (molten metal), and a lid body 82 that covers the upper portion of the main body 81. A shaft portion 83 that protrudes in a direction away from the main body 81 protrudes from a side portion of the main body 81. The shaft portion 83 has a columnar first trunnion 84 and a prismatic second trunnion 85, and is symmetric with respect to a straight line that bisects the main body 81 indicated by a one-dot chain line in FIG. Are provided respectively.

In addition, a pair of immersion nozzles 86 project from the bottom of the main body 81.
The vehicle body 3 includes a frame body 12 having a quadrangular shape in plan view in which four base portions 10 are connected by beam members 11, and is disposed on a pair of rails R that are laid across the mold I. Each base 10 is provided with a wheel 13. A pair of wheels 13 provided on each of the pair of bases 10 facing one rail are arranged on the one rail R, and a pair of wheels 13 provided on each of the pair of bases 10 facing the other rail are provided. Deployed on the other rail R.
Further, one wheel 13 on one rail R and the wheel 13 on the other rail R facing the wheel 13 are connected to a drive device (not shown). The vehicle body 3 can move on the pair of rails R by driving the driving device to roll the pair of wheels 13.

The pair of rails R, the vehicle body 3, the wheels 13, and the driving device form a first horizontal moving means 5 that can move the tundish mounting device 4 in the laying direction of the pair of rails R.
A columnar guide post 14 is erected on each base portion 10 of the vehicle body 3. Further, between the guide post 14 erected on one base 10 on one rail R and the guide post 14 erected on the base 10 on the other rail R opposite to the one base 10 and Between the guide post 14 erected on the other base 10 on one rail R and the guide post 14 erected on the base 10 on the other rail R opposite to the other base 10, A tundish mounting device 4 is provided.

Each tundish mounting device 4 includes a support frame 20 spanned between a pair of guide posts 14, a weighing device 1 mounted on the support frame 20, and the weighing device 1 together with the support frame 20. A vertical position adjusting means 7 for moving the apparatus and a second horizontal moving means 6 for horizontally moving the weighing apparatus 1 in the extending direction of the support frame 20 are provided.
The vertical position adjusting means 7 is formed on each guide post 14 so as to extend in the vertical direction. The rail 14a faces the support frame 20, and is formed at the end of the support frame 20 so as to be slidable on the rail 14a. 20 d of engaging parts and the frame raising / lowering means 15 which moves the support frame 20 up and down along the said rail 14a are provided.

The frame elevating means 15 includes a pair of elevating devices 21 configured by a worm jack or the like disposed between the support frame 20 and the beam member 11 of the vehicle body 3, and a motor disposed between the pair of elevating devices 21. 22. By driving the motor 22, the pair of lifting devices 21 expands and contracts in synchronization. The support frame 20 moves up and down (moves up and down) by the expansion and contraction of the pair of lifting devices 21.
In addition, since the support frame 20 is installed as described above, the extending direction of the support frame 20 and the laying direction of the pair of rails R are orthogonal or substantially orthogonal.

As shown in FIG. 3, the weighing device 1 is mounted on an upper open casing 30, at least a pair of weighing instruments 31 accommodated in a row in the casing 30, and on the weighing instrument 31. And a saddle 32 that is received in the casing 30 and receives the shaft 83 of the tundish 80. The saddle 32 is received in the upper opening-shaped receiving portion 20a provided in the central portion of the support frame 20. .
With this configuration of the weighing device 1, when the shaft portion 83 of the tundish 80 is mounted on the saddle 32, the weight (that is, mass) of the tundish 80 is transmitted to the weighing instrument 31 through the saddle 32. Is weighed.

The casing 30 is formed in a U-shaped cross section formed by connecting the lower ends of a pair of side wall portions 34 that extend in the extending direction of the support frame 20 and are opposed to each other by a bottom wall portion 35. Thereby, the saddle accommodation part S which accommodates the saddle 32 between a pair of side wall parts 34 will be formed.
In addition, a bulging portion 36 that bulges outward from one end to the other end of the side wall portion 34 is provided on each of the upper portions of the pair of side wall portions 34. As shown in FIG. 5, the casing 30 is accommodated in the accommodating portion 20 a in a state in which the bulging portion 36 is seated via a spacer 37 on the opening edge of the accommodating portion 20 a of the support frame 20. A gap is provided between the bottom wall portion 35 of the casing 30 and the bottom portion 20 b of the support frame 20.

Further, as shown in FIG. 4, a long hole 20 c that is long in the extending direction of the support frame 20 is formed in the bottom portion 20 b of the support frame 20 at two positions facing the bottom wall portion 35 of the casing 30. Yes. Fasteners 39 made of bolts or the like are inserted into the long holes 20c from below the support frame 20.
The fastener 39 is formed by projecting a shaft portion 39b on a head portion 39a. A slight gap is provided between the head 39 a of the fastener 39 and the bottom 20 b of the support frame 20. The fastener 39 restricts the casing 30 from being lifted together with the tundish 80 when the tundish 80 placed on the saddle 32 is lifted upward.

4 and 7, the accommodating portion 20a of the support frame 20 is formed such that the length of the support frame 20 in the extending direction is larger than the length of the casing 30 in the same direction.
The second horizontal moving means 6 is disposed between the support frame 20 and the casing 30. The second horizontal moving means 6 includes a hydraulic cylinder 40 provided along the extending direction of the support frame 20, a first bracket 41 that protrudes from the casing 30 and is pivotally supported at the tip of the hydraulic cylinder 40. And a second bracket 41 a that protrudes from the support frame 20 and is connected to the trunnion portion of the hydraulic cylinder 40. By extending and contracting the hydraulic cylinder 40, the casing 30 is movable in the extending direction of the support frame 20 while being accommodated in the accommodation portion 20 a of the support frame 20.
Instead of the hydraulic cylinder 40, a telescopic device such as a screw jack can be employed.

In the present embodiment, the first horizontal moving means 5 and the second horizontal moving means 6 form a horizontal position adjusting means 8 capable of adjusting the horizontal position of the weighing device 1.
That is, by moving the tundish car 2 in the extending direction of the rail R by the first horizontal moving means 5, it is possible to adjust the position of the weighing device 1 in the extending direction of the rail. Further, by moving the casing 30 of the weighing device 1 by the second horizontal moving means 6, it is possible to adjust the position of the weighing device 1 in a direction perpendicular to the rail extending direction. The horizontal position of the weighing device 1 can be freely adjusted, so that the horizontal position of the tundish 80 placed on the weighing device 1 can also be freely adjusted. .

In this embodiment, the vertical position adjusting means 7 and the horizontal position adjusting means 8 form a position adjusting means 9 that can freely adjust the position of the weighing device 1.
As shown in FIGS. 3 and 4, the pair of weighers 31 are each formed by a load cell. One weigher 31 is accommodated on one end side of the saddle accommodating part S in a state of being mounted on a pedestal 42 provided on the bottom wall part 35 of the casing 30 with the load loading direction being the vertical direction, The weigher 31 is also housed on the other end side of the saddle housing part S in a state of being mounted on the pedestal 42. Further, each weigher 31 has a size that is perpendicular to the compression direction (hereinafter referred to as the width of the weigher 31) smaller than the distance between the pair of side wall portions 34 of the casing 30. Yes.

It is also possible to provide an air purge means (not shown) for air-cooling the weigher 31 composed of the load cell. The load cell is greatly affected by heat. On the other hand, the weighing device 1 of the present embodiment including the load cell weighs the tundish 80 having a very large heat capacity. When the tundish 80 is mounted on the tundish car 2, the tundish 80 is located in the vicinity of the load cell. It will be. For this reason, it is effective to maintain the load cell at a constant temperature by the air purge means.
The saddle 32 is formed in a flat plate shape having a pair of flat plate surfaces 44 parallel to each other, and is placed on the pair of weighing instruments 31 with the normal line of the pair of flat plate surfaces 44 oriented in the horizontal direction. .

The saddle 32 has a thickness that is larger than the width of the weigher 31 and slightly smaller than the distance between the pair of side wall portions 34 of the casing 30. For this reason, when the saddle 32 is accommodated in the casing 30, a slight gap is formed between each flat plate surface 44 and the side wall portion 34 of the casing 30.
The saddle 32 includes a first supported portion 45 placed on one weighing instrument 31 at one end, and is placed on the other weighing instrument 31 at the other end. A second supported portion 46 is provided, and a hanging portion 47 extending downward is provided between the pair of supported portions 45 and 46. A bearing portion 48 that receives the shaft portion 83 of the tundish 80 is provided on the upper portion of the saddle 32. The bearing portion 48 includes a concave arc seat portion 48 a that receives the cylindrical first trunnion 84, and a horizontal seat portion 48 b that receives the prismatic second trunnion 85.

  Further, a small edge surface 49 that forms a surface perpendicular to the pair of flat plate surfaces 44 of the saddle 32 has a position between the concave arc seat portion 48a and the first supported portion 45, and the horizontal seat portion 48b and the first seat portion. The groove part 49a over a pair of flat plate surface 44 is each recessedly provided in the position between 2 supported parts 46. As shown in FIG. A stopper piece 50 that is locked to the upper portion of the casing 30 is inserted into each groove 49a with a slight gap. By the pair of stopper pieces 50, the saddle 32 is restricted from moving in the extending direction of the support frame 20. The stopper piece 50 is provided with a function for regulating the lifting of the saddle 32 together with the tundish 80 when the tundish 80 placed on the saddle 32 is lifted upward.

Between the saddle 32 and the casing 30, a restricting means 51 that restricts the wobbling of the saddle 32 in the casing 30 is provided.
The regulating means 51 is provided with three contact bodies 52 that can make point contact with the saddle 32 at three locations that do not line up with each flat plate surface 44 of the saddle 32.
A saddle-side receiving portion 54 that receives each contact body 52 is recessed in each flat plate surface 44 of the saddle 32. The saddle side receiving portion 54 has a circular cross section parallel to the flat plate surface 44. One saddle side receiving portion 54 is provided on the first supported portion 45, one on the second supported portion 46, and one on the lower end portion of the hanging portion 47. Thereby, the contact body 52 deployed in a state of being accommodated in the saddle side receiving portion 54 is deployed in a positional relationship corresponding to the apex of the triangle.

In addition, the side wall 34 of the casing 30 is formed with an opening 55 penetrating the side wall 34 at a position facing each saddle side receiving portion 54 of the saddle 32, and the side wall 34 is formed in the opening 55. A cylindrical cap 56 is fitted from the outer side. The cap 56 is formed with a concave case-side receiving portion 57 having a circular cross section perpendicular to the axial center of the cap 56 at the end on the side facing the saddle 32.
Each contact body 52 is accommodated in a space formed by a saddle side receiving portion 54 provided in the saddle 32 and a case side receiving portion 57 provided in the casing 30. It is provided in between. Thereby, shortening of the weighing device 1 in the direction perpendicular to the extending direction of the support frame 20 is achieved.

As shown in FIGS. 5 and 6, each contact body 52 includes a saddle side contact portion 58 that contacts the saddle side receiving portion 54, a case side contact portion 59 that contacts the case side receiving portion 57, and these saddle side contact portions. 58 and a main body portion 60 having a case side contact portion 59 at both ends.
The main body 60 is formed in a cylindrical shape having a circular cross section slightly smaller than the saddle side receiving portion 54 and the case side receiving portion 57. Resin O-rings 61 each having an outer diameter slightly larger than the diameter of the circular cross section of the main body 60 are wound around both ends of the main body 60. The outer periphery of the O-ring 61 is in contact with the saddle-side receiving portion 54 or the case-side receiving portion 57, so that there is a slight gap between the outer periphery of the main body portion 60 and the saddle-side receiving portion 54 and the case-side receiving portion 57. A void is secured.

Each of the contact portions 58 and 59 is formed in a convex arc shape that protrudes in the axial direction of the main body portion 60 as it is separated from the main body portion 60.
Here, the curvature of each of the contact portions 58 and 59 having a convex arc shape is preferably approximated to the curvature of a virtual circle r ₁ whose diameter is the entire length of the contact body 52, as shown in FIG. It may be larger or smaller than the curvature of the circle r ₁ .
Further, a contact piece 62 that contacts the contact portion of the contact body 52 is provided on the saddle side receiving portion 54 of the saddle 32 and the case side receiving portion 57 of the casing 30. The contact portions 58 and 59 of the contact piece 62 and the contact body 52 are formed of bearing steel, high-strength steel, or the like, or are formed with high strength by performing a quenching process or a carburizing process.

In addition, the high strength here means that the Young's modulus, tensile strength, hardness, or any two or all of them are larger than those of the steel material forming the saddle 32 and the casing 30.
Thereby, the contact state between each contact part 58, 59 of the contact body 52 and the contact piece 62 of the saddle side receiving part 54 or the case side receiving part 57 is a point contact in which the mutual contact area is made as small as possible. Thus, the contact body 52 and each contact piece 62 can be regarded as being in a pseudo pin-bonded state by contacting each other.
Therefore, by placing the shaft portion 83 of the tundish 80 on the saddle 32, each weigher 31 is compressed and deformed, and as a result, the saddle 32 is slightly moved in the casing 30 as shown by a two-dot chain line in FIG. In the case where the contact body 52 sinks, the contact body 52 is accommodated in the saddle side receiving portion 54 with the contact portion of the case side contact portion 59 in contact with the contact piece 62 accommodated in the case side receiving portion 57 as a rolling fulcrum. The saddle side contact portion 58 that comes into contact with the contact piece 62 that is in contact with the saddle 32 rolls simultaneously with the sinking of the saddle 32, so that no sliding resistance occurs between the contact body 52 and the saddle 32. Thereby, most of the load of the tundish 80 is transmitted to the weigher 31, and the weight of the tundish 80 is accurately weighed by the weigher 31. In addition, since the contact portions 58 and 59 of the contact piece 62 and the contact body 52 are formed with high strength as described above, when the contact piece 62 and the contact portions 58 and 59 of the contact body 52 contact each other. However, these members 62, 58 and 59 are only slightly elastically deformed. As a result, the contact state of the contact portions 58 and 59 of the contact body 52 with respect to the contact piece 62 is maintained in a point contact state in which the contact area is extremely small.

Each contact body 52 is disposed between the saddle 32 and the casing 30 with a slight gap provided between the saddle side receiving portion 54 and the case side receiving portion 57. As a result, the saddle 32 is not in contact with the contact body 52 until it laterally moves due to an external force or thermally expands due to radiant heat from the tundish 80 or the like.
Further, the gap has a size that allows a slight lateral movement of the saddle 32, and the saddle 32 wobbles (rattles) with rotation in a direction in which the flat plate surface 44 is inclined. It is not acceptable. Therefore, the saddle 32 does not have to fall down to the state where the flat plate surface 44 is inclined in the casing 30, and is maintained in a state of sitting on the weighing instrument 31. For this reason, even when the contact body 52 contacts the saddle 32, there is no possibility that part or all of the weight of the saddle 32 is transmitted (flows) to the contact body 52.

In the present embodiment, a gap of 0 mm to 0.25 mm is provided between the saddle side receiving portion 54 and the saddle side contact portion 58 and between the case side receiving portion 57 and the case side contact portion 59.
According to the present embodiment, the saddle 32 is supported by the weigher 31 from below and is sandwiched between the restricting means 51 from both sides, and further, the stopper piece 50 from the longitudinal direction that is the extending direction of the support frame 20. Between the casing 30 and the casing 30.
Here, each contact body 52 constituting the regulating means 51 is arranged in contact with or slightly spaced from the saddle 32. Therefore, there is no possibility that the saddle 32 falls down in the casing 30, and even when the contact body 52 comes into contact with the saddle 32 receiving the shaft portion 83 of the tundish 80, the contact body 52 does not sink the saddle 32. As a result, rolling occurs as described above, and contact between the contact body 52 and the saddle 32 does not cause disturbance of the weight by the weigher 31, and the weight of the tundish 80 is accurately measured by the weigher 31. Will be weighed.

Therefore, according to this embodiment, the weight of the tundish 80 is weighed by the weigher 31 with extremely high accuracy.
In addition, the heat capacity of the tundish 80 is reduced due to a decrease in the molten steel in the tundish 80, and the tundish 80 may shrink in accordance with this. In this case, it is considered that a lateral force (tumbling force) along the axial direction of the shaft portion 83 of the tundish 80 acts on the saddle 32 due to the contraction of the tundish 80, but the saddle 32 moved laterally very slightly. Then, the three contact bodies 52 located on one side of the saddle 32 are contacted. At this time, each contact body 52 contacts the contact piece 62 of the saddle side receiving portion 54 of the saddle 32 and also contacts the contact piece 62 of the case side receiving portion 57 of the casing 30. As a result, further lateral movement of the saddle 32 is restricted. Alternatively, when all of the contact bodies 52 are in contact with the saddle 32 and the casing 30 from the beginning, the saddle 32 does not laterally move at all. Alternatively, even if a tumble force is applied to the saddle 32 due to contraction of the tundish 80 or the like, the contact body 52 of the restricting means 51 located on both sides of the saddle 32 restricts (restrains) the saddle 32 so that the saddle 32 Is pivoted very slightly and there is no risk of further pivoting.

Specifically, the three contact bodies 52 arranged with respect to one flat plate surface 44 of the saddle 32 have a triangular arrangement configuration that does not line up on the same straight line as described above. For this reason, when all of these three contact bodies 52 come into contact with the saddle 32, the saddle 32 is not only restricted in lateral movement by the three contact bodies 52 but also in rotation.
That is, when any two of the three contact bodies 52 are in contact with the saddle 32, the two contact bodies 52 are restricted from further lateral movement by the two contact bodies 52. The rotation of the saddle 32 with the connecting straight line as the rotation axis can be considered. However, in addition to the contact of these two contact bodies 52, the contact body 52 that is not on the straight line further comes into contact with the saddle 32, so that its rotation is also restricted.

Therefore, according to this embodiment, even when a lateral force is applied to the saddle 32 by the tundish 80, the wobble is restricted. Further, there is no possibility that the regulating means 51 and the stopper piece 50 for suppressing the wobbling bear the load from the tundish 80, and the configuration in which the posture of the saddle 32 is maintained by the regulating means 51 and the stopper piece 50 is considered. There is no risk of disturbance to the weight of the tundish 80 by the heavy equipment 31. As a result, it is possible to accurately weigh the tundish 80 by the weighing device 1.
FIG. 8 shows a second embodiment of a container support device on which the weighing device 1 according to the present invention is mounted. In the second embodiment, a swing that supports a ladle (container) 90 as the container support device. A tower 70 is employed.

The swing tower 70 includes a pedestal 71 and a swing body 72 that is rotatably supported by the pedestal 71. The swing body 72 has a pair of ladle support portions 73 extending radially outward from the center of rotation, and a weighing device that supports the trunnion 91 of the ladle 90 at the tip of each ladle support portion 73. 1 is deployed.
Since the configuration of the weighing device 1 is substantially the same as that of the first embodiment except for the configuration of the bearing portion 48 of the saddle 32, the same reference numerals are given and description thereof is omitted.
The bearing portion 48 of the saddle 32 is formed in a concave arc shape at a substantially central position with respect to the pair of supported portions 45 and 46, and holds the trunnion 91 of the ladle 90 by the bearing portion 48. Yes.

According to this embodiment, the weight of the ladle 90 will be measured very accurately, and more advanced process management will be possible in continuous casting.
9 and 10 show a second embodiment of the weighing device 1 according to the present invention.
In this embodiment, since it is the same structure as the said embodiment except the structure of a contact body and a stopper piece, the same code | symbol as the said embodiment is attached | subjected and description is abbreviate | omitted.
In this embodiment, the contact body 64 is formed in a long column shape. The contact body 64 has a predetermined thickness in a side surface shape in which one end of a pair of parallel straight lines is connected by a convex arc-shaped curve and the other end is connected by a convex arc-shaped curve. Is formed. Thus, the saddle side contact portion 65 at one end of the contact body 64 enables line contact perpendicular to the sinking direction of the saddle 32 and the case side contact portion 66 at the other end of the contact body 64. Enables a line contact perpendicular to the sinking direction of the saddle 32. Further, the saddle side contact portion 65 at one end of the contact body 64 is in line contact with the saddle 32 on a plane perpendicular to the sinking direction of the saddle 32, and the case side of the other end portion of the contact body 64. It can be said that the contact portion 66 is in line contact with the casing 30 on the plane.

Further, the curvatures of the saddle side contact portion 65 and the case side contact portion 66 formed in the convex arc shape are preferably approximated to the curvature of the virtual circle r ₂ having the entire length of the contact body 64 as a diameter, it may be even smaller larger than the curvature of the imaginary circle r _2.
Also in this embodiment, even when the saddle 32 slightly sinks in the casing 30 by placing the shaft portion 83 of the tundish 80 on the saddle 32, the contact body 64 has the case side receiving portion. The saddle-side contact portion 65 that contacts the saddle-side receiving portion 54 rolls at the same time as the saddle 32 sinks, with the contact portion of the case-side contact portion 66 that is in contact with 57 as a rolling fulcrum. There is no sliding resistance between the body 64 and the saddle 32. Thereby, most of the load of the tundish 80 is transmitted to the weigher 31, and the weight of the tundish 80 is accurately weighed by the weigher 31.

Further, since the contact state of each contact body 64 to the saddle 32 and the casing 30 is a line contact, the posture of the saddle 32 can be further stabilized and the wobbling of the saddle 32 is restricted.
Instead of the contact body 64, a wheel having a circumference such as the virtual circle r ₂ may be employed. Further, the contact piece 62 may be disposed between the contact portions 65 and 66 of the contact body 64 and the saddle 32 and the casing 30.
In the present embodiment, a saddle-side receiving portion 54 is recessed in the small face 49 of the saddle 32 and the contact body 64 is brought into contact with the saddle-side receiving portion 54.

  The load cell employed as the weighing instrument 31 in this embodiment has a curved contact surface that contacts the supported portions 45 and 46 of the saddle 32 and a contact surface that contacts the bottom wall portion 35 of the casing 30. The saddle 32 placed on such a load cell is not only staggered in the direction in which the flat plate surface 44 is tilted as in the above embodiment, but also in the direction in which the fore edge surface 49 is tilted. There is a fear. Therefore, by providing the contact body 64 on the small face side of the saddle 32 as in this embodiment, the wobbling of the saddle 32 in the small face direction (the extending direction of the support frame 20) can contact the small face surface 49. It is regulated by the contact body 64 arranged in the above. Further, the contact body 64 rolls due to the saddle 32 being submerged, so that no sliding resistance is generated between the saddle 32 and the contact body 64, whereby the weight of the tundish 80 is highly accurate. It will be measured.

Instead of the contact body 64, it is also possible to employ the contact body 52 employed in the first and second embodiments of the container support device.
Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments. For example, the contact portions 58, 59, 65, 66 of the contact bodies 52, 64 can be formed in a cone shape. Further, when the contact body 52 is formed in an elliptical shape extending toward the saddle side receiving portion 54 and the case side receiving portion 57, the same effects as in the present embodiment are obtained. Further, the arrangement of the three contact bodies 52, 64 arranged on one side of the saddle 32 and the arrangement of the three contact bodies 52, 64 arranged on the other side need not be symmetrical with each other. It is also possible to adopt a configuration in which the arrangement of the three contact bodies 52 and 64 with respect to is different from the arrangement of the three contact bodies 52 and 64 with respect to the other side. For example, the contact bodies 52 and 64 on one side of the saddle 32 are arranged at positions that become the apexes of triangles, and the contact bodies 52 and 64 on the other side of the saddle 32 are set at positions that become the apexes of inverted triangles relative to the triangles. It is also possible to adopt a configuration to deploy each.

It is a side view of 1st Embodiment of the container support apparatus provided with the weighing apparatus which concerns on this invention. It is a front view of a tundish car. It is a perspective view which decomposes | disassembles and shows the main structures of a weighing device. It is a cross-sectional side view of a weighing device. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which expands and shows a contact body and its periphery. It is a top view of a weighing device. It is a side view of 2nd Embodiment of the container support apparatus provided with the weighing apparatus which concerns on this invention. It is a perspective view which decomposes | disassembles and shows a part of 2nd Embodiment of the weighing apparatus which concerns on this invention. It is a perspective view of a contact body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Weighing device 2 Tundish car 3 Car body 4 Tundish mounting apparatus 20 Support frame 30 Casing 31 Weighing device 32 Saddle 51 Control means 52 Contact body 54 Saddle side receiving part 57 Case side receiving part 58 Saddle side contact part 59 Case Side contact portion 60 Body portion 62 Contact piece 64 Contact body 65 Saddle side contact portion 66 Case side contact portion 70 Swing tower 80 Tundish 81 Main body 83 Shaft portion 90 Ladle 91 Trunnion

Claims (9)

A saddle that receives a shaft portion of a container capable of charging molten metal; at least a pair of weighers that support the saddle from below and weigh the container in a line; and the saddle and the weigher; A weighing apparatus provided with a regulating means for regulating the fluctuation of the saddle in the casing between the saddle and the casing.
The saddle includes a pair of side surfaces facing each other across a straight line connecting the centers of the weighers arranged in a row, and the restricting means is disposed at a position facing each of the pair of side surfaces of the saddle. At least three places that do not line up on the same straight line
Each contact body includes a saddle side contact portion that can make point contact with the saddle, and a case side contact portion that can make point contact with the casing, and the saddle side contact portion in the saddle sinking direction centering on the case side contact portion. A weighing device, wherein the weighing device is arranged between the saddle and the casing in a swingable state. A saddle that receives a shaft portion of a container capable of charging molten metal; at least a pair of weighers that support the saddle from below and weigh the container in a line; and the saddle and the weigher; A weighing apparatus provided with a regulating means for regulating the fluctuation of the saddle in the casing between the saddle and the casing.
The saddle includes a pair of side surfaces facing each other across a straight line connecting the centers of the weighers arranged in a row, and the restricting means is disposed at a position facing each of the pair of side surfaces of the saddle. At least three places that do not line up on the same straight line
Each contact body includes a saddle side contact portion that enables a line contact perpendicular to the sinking direction of the saddle, and a case side contact portion that can make a line contact with the casing similarly to the saddle side contact portion. A weighing device, wherein the saddle side contact portion is arranged between the saddle and the casing in a state in which the saddle side contact portion can swing in the sinking direction of the saddle with the contact portion as a central axis.   The saddle is formed in a flat plate shape and mounted on the weigher with a pair of flat plate surfaces as the pair of side surfaces, and each contact body of the regulating means is slightly on each of the pair of flat plate surfaces. The weighing device according to claim 1, wherein the weighing device is opposed or in contact with each other through a gap.   The weighing device according to claim 1, wherein each contact portion of the contact body is formed in a convex arc shape.   The saddle is formed with a saddle-side receiving portion that receives a saddle-side contact portion of the contact body, and the casing is formed with a case-side receiving portion that receives a case-side contact portion of the contact body. The weighing device according to any one of claims 1 to 4, wherein one or both of them are recessed.   The saddle-side receiving portion of the saddle and the case-side receiving portion of the casing are provided with contact pieces that contact the contact portions of the contact body, and the contact pieces and the contact portions of the contact body are high. The weighing device according to claim 5, wherein the weighing device is formed to be strong.   The restricting means includes at least one contact body that can contact the opposite end portions at positions facing both end portions of the saddle located in the direction of extension of a straight line connecting the centers of the weighers arranged in a row. The weighing device according to claim 1, wherein the weighing device is provided at a location.   A container support device comprising: the weighing device according to any one of claims 1 to 7; and a position adjusting unit capable of adjusting a position of the weighing device.   The position adjusting means includes one or both of a horizontal position adjusting means capable of adjusting a horizontal position of the weighing device and a vertical position adjusting means capable of adjusting a vertical position perpendicular to the horizontal direction. The container support device according to claim 8, wherein the container support device is provided.

Images