JP6467511B2 - Slide metal frame positioning mechanism - Google Patents

Description

  The present invention relates to a slide metal frame positioning mechanism in a sliding nozzle device that controls the flow rate of molten metal.

  The sliding nozzle device slides (slides) one of these plates in a state where a refractory plate having two or three nozzle holes is sandwiched at a high pressure (a surface pressure is applied). Thus, the flow rate of the molten metal is controlled by changing the opening of the nozzle hole. The sliding plate is held by a slide metal frame, and the slide metal frame is attached so as to be openable and closable for exchanging the plate.

  Since the plate has a service life after several uses, it is necessary to open the slide frame when replacing the plate or checking the damaged state. At this time, the surface pressure must be released before the slide metal frame is opened, and the surface pressure must be applied after the slide metal frame is closed.

  As a method of releasing the load of the surface pressure in the sliding nozzle device, a method of releasing the load of the surface pressure by sliding the slide metal frame is known. That is, the spring is bent using the driving force when the slide metal frame slides. Among these methods, there is a type in which the slide range (movement range) of the slide metal frame when releasing the surface pressure is out of the slide range during casting. Here, a driving device having different strokes is used during casting and when the surface pressure load is released.

  For example, in the sliding nozzle device described in Patent Document 1, the tip coupling portion 72 of the rod 71 of the oil cylinder 70 is detachably attached to the coupling portion 35 of the slide metal frame 30. Further, the main body of the oil cylinder 70 is detachably attached to the oil cylinder attachment portion 23 of the fixed metal frame 20, so that different strokes can be used when the plate is used and when it is replaced. In the first embodiment, by using two oil cylinders having different strokes, the movable range of the slide metal frame 30 can be changed, and the surface pressure can be loaded and released.

  However, in the sliding nozzle device described in Patent Document 1, an oil cylinder having a long stroke is used when the slide metal frame is opened. At this time, the nozzle hole is fully opened to remove the steel clogged in the nozzle hole. And shall be. Since the fully opened position is a position in the middle of the stroke of the oil cylinder, there is a problem that much labor is required for positioning.

  In the case where the plate mounting direction is opposite to that of Patent Document 1, when replacing the oil cylinder with a long stroke to the oil cylinder with a short stroke, the slide metal frame must be positioned at an accurate replacement position. Since the replacement position is a position in the middle of the stroke of the oil cylinder, there has been a problem that much fine work is required to repeat the fine movements before and after the oil cylinder for positioning. In addition, if the oil cylinder with a short stroke does not reach (cannot be inserted), the mounting position of the tip coupling portion must be changed before the casting starts, resulting in a problem that greatly affects the operation.

  Further, Patent Document 2 describes a structure in which the connecting portion 40 is automatically connected when the linear drive device 30 is pushed into the holding portion 28 by sliding the drive rod 32 toward the sliding body unit 25. Has been. However, since it is a structure that uses a pawl element or a spring member that is supported in an articulated manner as a structure that automatically connects, there is a problem because distortion due to heat occurs in an environment that is used at high temperatures. There is a problem that it is easy and has a short life.

International Publication No. 2014/157157 Japanese Patent Laid-Open No. 11-5154

  The problem to be solved by the present invention is to provide a slide metal frame positioning mechanism that can accurately position the slide metal frame with a simple operation and is excellent in durability.

According to the present invention, the following slide metal frame positioning mechanisms (1) to (4) are provided. (1) Slide in a sliding nozzle device that slides a slide metal frame holding a plate with respect to a fixed metal frame by using two drive units having different strokes when controlling the flow rate of molten metal and when releasing a surface pressure load A metal frame positioning mechanism,
A stopper is provided on either the connecting part of the drive unit and the slide metal frame or the fixed metal frame,
A contact portion with the stopper is provided on the other of the connecting portion and the fixed metal frame,
The slide metal frame positioning mechanism is configured such that the slide metal frame is positioned by the contact between the stopper and the contact portion.
(2) Two stopper contact surfaces are provided on both sides of the connecting portion between the driving portion and the slide metal frame,
The stopper is provided with two receiving portions having receiving surfaces capable of contacting the two stopper contacting surfaces,
A hole in which the two receiving parts of the stopper can be inserted is provided in the fixed metal frame,
The slide metal frame positioning mechanism according to (1), wherein the position of the slide metal frame in the sliding direction is positioned by contact between the receiving surface of the stopper and the stopper contact surface.
(3) The stopper receiving portion is fixed on the base end side of the insertion portion inserted into the hole of the fixed metal frame and on the side opposite to the force receiving side received when the slide metal frame is positioned by the driving portion The slide metal frame positioning mechanism according to (2), which has a fixed metal frame contact surface capable of contacting a surface of the metal frame on the slide metal frame side.
(4) A stopper is provided at the connecting part between the drive part and the slide metal frame so as to protrude in the direction of the fixed metal frame,
The fixed metal frame is provided with a concave portion extending in the slide direction of the slide metal frame so that the stopper can be moved. The slide metal frame is positioned in the sliding direction by contact between the stopper and the inner wall of the concave portion (1). The positioning mechanism of the slide metal frame as described.

  According to the positioning mechanism of the slide metal frame of the present invention, the slide metal frame is positioned by the stopper. Therefore, the slide metal frame can be accurately positioned by a simple operation without performing a complicated positioning operation. Furthermore, since this positioning is a simple mechanism of contact between the stopper and the contact portion, the parts used have a simple structure and are excellent in durability.

It is a perspective view of a sliding nozzle device main body, a drive part, and a stopper concerning the 1st example of the present invention. It is a perspective view of a stopper. It is a perspective view of the front-end | tip connection part of a drive part. It is a perspective view of a sliding nozzle device when a drive part (hydraulic cylinder) is located in a retreat limit. It is a perspective view of a sliding nozzle device in which a drive unit (hydraulic cylinder) is positioned at a retreat limit and a stopper is inserted. It is a perspective view of a sliding nozzle device in the state where the tip connection part of a drive part (hydraulic cylinder) contacted a stopper. FIG. 7 is a perspective view of the sliding nozzle device with the stopper removed in FIG. 6. It is explanatory drawing of the contact state of the front-end | tip connection part of a drive part, and a stopper. It is a perspective view of the positioning mechanism of the slide metal frame which concerns on 2nd Example of this invention. It is a perspective view of a stopper. It is a perspective view of the positioning state by a stopper. It is a perspective view of the principal part of the fixed metal frame used for the positioning mechanism of the slide metal frame which concerns on 3rd Example of this invention, and this positioning mechanism. It is a perspective view which shows the principal part of the positioning mechanism of FIG. 12 (state in which the protrusion part of the stopper is accommodated in the intermediate | middle connection part). It is a perspective view which shows the principal part of the positioning mechanism of FIG. 12 (state which the protrusion part of the stopper protruded from the intermediate | middle connection part). It is a perspective view of the principal part of a sliding nozzle device in the state where the projection part of the stopper contacted the inner wall of the crevice of a fixed metal frame in the 3rd example. FIG. 10 is a perspective view of a sliding nozzle device in a state where a driving portion (hydraulic cylinder) is in a forward limit position and the surface pressure is released in the third embodiment.

  A first embodiment of the slide metal frame positioning mechanism of the present invention will be described with reference to FIGS. In addition, since the check and replacement of the plate, and the release of the surface pressure load are performed in a state where the sliding nozzle device 1 is set in the vertical state, the sliding nozzle device 1 is also moved vertically in FIGS. 1, 4 to 9 and FIG. The state is shown in a state of standing.

  In FIG. 1, a sliding nozzle device 1 according to the present invention includes a sliding nozzle device body 2, a drive unit 3, and a stopper 4.

  The sliding nozzle device body 2 includes a fixed metal frame 5, a slide metal frame 6 that is slidable on the fixed metal frame 5 and that can be opened and closed, and two open / close units that are rotatably provided on both sides of the fixed metal frame 5. It has a metal frame 7. The fixed metal frame 5 has a substantially rectangular plate shape, and its side surface is attached to the bottom of the molten metal container by a bolt 11. Although not shown, a refractory plate is held on the fixed metal frame 5 and the slide metal frame 6 in the same manner as in Patent Document 1, and slides in a state where the sliding surfaces of the plates are in contact with each other by the drive unit 3. can do.

  The fixed metal frame 5 has a drive unit holder 50 at one end in the longitudinal direction. The drive unit holder 50 is provided with two grooves 51 and 52 each having an inlet on one side so as to face each other with the space 53 interposed therebetween.

  In the drive unit 3, a hydraulic cylinder 31 is used as a drive device. The hydraulic cylinder is attached to a rectangular substrate 33 so that the rod 32 penetrates, and the tip of the rod 32 has a tip connecting portion 8 as a connecting portion. The drive unit 3 is detachably attached to the drive unit holder 50 by inserting the edge 35 of the substrate 33 into the grooves 51 and 52 of the drive unit holder 50. Further, the upper surface 36 and the lower surface 37 of the substrate 33 are in contact with the inner walls of the grooves 51 and 52, so that a reaction force when the slide metal frame 6 is slid (slid) can be received.

  As shown in FIG. 3, the distal end connecting portion 8 of the driving portion 3 is substantially T-shaped in plan view, and a fitting groove 82 and a fitting convex portion 83 that open on the side surface as a fitting portion 81 on the tip side. have. On the rod 32 side of the tip connecting portion 8, there are step portions 84 and 85 on both sides, and the step contact portions 84 and 85 form stopper contact surfaces 86 and 87 perpendicular to the surface including the sliding surface of the plate, respectively. ing.

  The slide metal frame 6 has a slide metal frame side connection part 60 as a connection part on the drive part holder 50 side, and the slide metal frame side connection part 60 is driven by fitting with the front end connection part 8 of the drive part 3. The part 3 and the slide metal frame 6 are detachably connected. The slide metal frame side connecting portion 60 has a fitting groove 61 opened on the side surface and a fitting convex portion 62 at the tip.

  In the present invention, the connecting portion is a portion that connects the driving portion and the slide metal frame. In the present embodiment, the tip connecting portion 8 and the slide metal frame side connecting portion 60 are both connecting portions, and the tip connecting portion 8 and the slide metal frame side connecting portion 60 are connected so that the slide metal frame is shown in FIG. It can slide (slide) in the vertical direction.

  As shown in FIG. 2, the stopper 4 has a connecting bar 43 for connecting the two receiving portions 41, 42, and a handle 44 attached to the connecting bar 43, and the two receiving portions 41, 42 are connected at the tip. Receiving surfaces 45 and 46 capable of abutting against the stopper abutting surfaces 86 and 87 of the portion 8 are provided. The distal ends of the receiving portions 41, 42 are insertion portions 41a, 42a, and are stepped portions 41b, 42b on the slide metal frame side at the base end side of the insertion portions 41a, 42a when the stopper is inserted, The stepped portion has fixed metal frame contact surfaces 47 and 48 that can contact the surface of the fixed metal frame on the slide metal frame side.

  Next, a method for positioning the slide metal frame will be described with reference to FIGS. 4 to 8 are examples in which a hydraulic cylinder 31 having a stroke as long as 250 mm is used.

  FIG. 4 shows a state in which the surface pressure is applied by moving the hydraulic cylinder 31 from the forward limit position to the reverse limit position after the slide metal frame 6 is closed. When the two receiving portions 41 and 42 of the stopper 4 are inserted into the two holes 54 and 55 of the fixed metal frame 5 in this state, the state shown in FIG.

  When the hydraulic cylinder 31 is advanced in the state of FIG. 5, the two stopper abutting surfaces 86 and 87 of the tip connecting portion 8 of the hydraulic cylinder 31 abut on the receiving surfaces 45 and 46 of the stopper 4. It stops and it will be in the state of FIG.

  Here, since the driving force of the driving device normally used in the sliding nozzle device may be up to 30 t, if the driving of the driving unit is forcibly stopped halfway using a stopper, the driving unit and the slide metal frame A very large force is applied to the connecting part. In the present invention, since the two stopper contact surfaces provided on both sides of the connecting portion between the drive portion and the slide metal frame are in contact with the two receiving surfaces of the stopper, the drive portion when the drive is stopped It is possible to suppress distortion of the rod and the connecting portion. If the stopper contact surface is provided only on one side, the rod of the drive unit is distorted, and the slide metal frame cannot be slid smoothly, and the drive device may break down. Although it is conceivable to provide a stopper by providing a long hole in the slide metal frame on the central axis of the rod, the apparatus becomes large because the slide metal frame must be made strong.

  6 will be described in detail. As shown in FIG. 8, the stopper abutting surface 86 of the connecting tip 8 abuts on the receiving surface 46 of the receiving portion 42. However, the tip connecting portion 8 and the fixed metal frame 5 are in contact with each other. The gap is 2 mm. That is, the gap between the lower ends of the stopper contact surfaces 85 and 86 and the fixed metal frame 5 is 2 mm. As described above, since the force is applied to the receiving portions 41 and 42 of the stopper 4 inserted into the holes 54 and 55 of the fixed metal frame 5 from near the fixed metal frame 5, the bending moment acting on the receiving portions 41 and 42 is reduced. can do. As a result, by making the stopper 4 small, it is possible to reduce the weight so that it is difficult to get tired even if a person handles it with one hand. From such a viewpoint, the gap between the fixed metal frame 5 and the lower ends of the stopper contact surfaces 85 and 86 is preferably small, and is preferably 1 mm or more and 10 mm or less.

  Further, in this embodiment, the receiving portions 41 and 42 of the stopper 4 are on the base end side of the insertion portions 41a and 42a, as shown in FIG. Step portions 41b and 42b are provided. In FIG. 2, since the driving force works in the direction from the driving unit to the slide metal frame at the time of positioning, the receiving side of the force in the receiving units 41 and 42 is the driving unit side, and on the side opposite to the driving unit side. Step portions 41b and 42b are provided. The stepped portions 41b and 42b form fixed metal frame contact surfaces 47 and 48 that contact the surface of the fixed metal frame on the slide metal frame side. Since the fixed metal frame abutment surfaces 47 and 48 can receive the bending moment to the receiving parts 41 and 42 generated by the thrust of the hydraulic cylinder by the fixed metal frame 5, the receiving parts 41 and 42 are deformed. Can be prevented. It should be noted that there is no particular problem even if the drive unit side has a stepped portion as shown in FIG.

  In this embodiment, the stopper contact surfaces 85 and 86 of the connecting tip 8 are in contact only with the receiving surfaces 45 and 46 of the receiving portions 41 and 42, but in addition to this, the connecting bar 43 of the stopper 4 Can also be brought into contact. Further, depending on the positional relationship between the connecting portion and the stopper, the stopper contact surface can be provided at the connecting portion on the slide metal frame side.

  In FIG. 6, the insertion position of the stopper 4 is set in advance so that the position where the slide metal frame 6 is stopped by the stopper 4 becomes the mounting position (exchange position) of the driving unit with a short stroke. The short stroke drive is mounted at the forward limit.

  In FIG. 6, when the hydraulic cylinder 31 is moved backward by a minimum distance so that the stopper 4 can be removed to separate the stopper 4 and the tip connecting portion 8, the state shown in FIG. At this time, if a gap is secured a little (for example, 5 mm or less) in the fitting portion between the tip connecting portion 8 and the slide metal frame side connecting portion 60, and the hydraulic cylinder 31 is retracted within the gap. The slide metal frame 6 does not move.

  In this state of FIG. 7, by sliding the hydraulic cylinder 31 in the lateral direction, the substrate 33 of the drive unit 3 is separated from the grooves 51 and 52 of the drive unit holder 50, and at the same time, the slide metal frame side connecting portion 60 of the slide metal frame 6. The tip connecting portion 8 of the driving unit 3 is separated from the. At this time, the slide metal frame 6 is not displaced because the surface pressure is applied even if the connection with the drive unit 3 is separated. Since the slide metal frame 6 is positioned by the stopper 4 so as to be fitted to the tip connecting portion 8 of the short stroke drive unit as described above, when the short stroke drive unit is fitted to the drive unit holder 50, At the same time, the distal end connecting portion 8 of the driving portion 3 can be fitted into the slide metal frame side connecting portion 60. Therefore, it is not necessary to perform a complicated positioning operation when replacing the drive unit with a short stroke. Note that the central axis of the rod of the short stroke drive unit coincides with the central axis of the rod of the long stroke drive unit.

  For example, in the case of a molten steel pan, replacement with a short stroke drive unit can be performed in a state of being held by a turret (swing tower) immediately before discharge to a tundish, or immediately after plate replacement.

  In this embodiment, the surface pressure is applied at the position on the backward limit side of the drive unit having a long stroke, but the positioning mechanism of the present invention is applied when the surface pressure is applied at the position on the forward limit side. Is also applicable. In this case, the slide metal frame is positioned to fully open the nozzle hole using a long stroke drive unit.

  Next, a second embodiment of the slide metal frame positioning mechanism of the present invention will be described with reference to FIGS. In FIG. 9, an intermediate connecting portion 9 is provided as a connecting portion between the slide metal frame 6 and the drive portion 3. The intermediate connecting portion 9 is a connecting rod 91 having a T-shaped plan view on the slide metal frame side, and can be attached to and detached from the fitting hole 63 of the slide metal frame. Further, the tip of the rod 32 of the hydraulic cylinder 31 is similarly T-shaped in plan view, and is attachable to and detachable from the fitting hole 95 of the intermediate connecting portion. The intermediate connecting portion 9 has three stopper contact surfaces 92, 93, 94 on both sides and the opposite side of the fixed metal frame across the central axis of the rod 32. The stopper contact surfaces 92, 93 and 94 are perpendicular to the surface including the sliding surface of the plate.

  As shown in FIG. 10, the stopper 4 has a connecting bar 43 that connects the two receiving portions 41 and 42, and a handle 44 attached to the connecting bar, and the two receiving portions 41 and 42 and the connecting bar 43 include Receiving surfaces 45, 46, and 49 that can come into contact with the stopper contact surfaces 92, 93, and 94 of the intermediate connecting portion 9 are provided. The receiving portions 41 and 42 have insertion portions 41a and 42a to be inserted into the holes 54 and 55 of the fixed metal frame, and the base end sides thereof are step portions 41b and 42b. The stepped portions 41b and 42b form fixed metal frame contact surfaces 47 and 48 that can contact the surface of the fixed metal frame on the slide metal frame side.

  In FIG. 9, when the stopper 4 is inserted into the holes 54 and 55 of the fixed metal frame and the hydraulic cylinder 31 is advanced, the stopper contact surfaces 92, 93, and 94 of the intermediate connecting portion 9 abut against the stopper receiving surfaces 45, 46, and 49. By contact, the drive of the hydraulic cylinder 31 can be stopped, and the slide metal frame 6 is positioned and is in the state shown in FIG. In this state, the hydraulic cylinder 31 is moved backward by a minimum distance so that the stopper 4 can be removed, and the stopper 4 and the intermediate connecting portion 9 are separated, and then the stopper 4 is removed. At this time, a small gap is secured at the time of fitting in each fitting portion of the intermediate connecting portion 9 and the slide metal frame side connecting portion 60 and the intermediate connecting portion 9 and the rod 32 of the hydraulic cylinder. If the hydraulic cylinder 31 is moved backward within the total range, the slide metal frame 6 does not move. Since the slide metal frame 6 and the intermediate connecting portion 9 are detachably connected, the slide metal frame can be opened when the surface pressure is released.

  As in the first and second embodiments, by providing the stopper abutting surface at the connecting portion other than the slide metal frame, the slide metal frame does not move when the stopper is removed. Can be accurately positioned. On the other hand, when a stopper contact surface is provided on the slide metal frame, the slide metal frame must be moved in order to remove the stopper. It will move to the position. Therefore, it is more preferable that the stopper contact surface is provided at the tip connecting portion or the intermediate connecting portion.

  Next, a third embodiment of the slide metal frame positioning mechanism of the present invention will be described with reference to FIGS. In FIG. 12, an intermediate connecting portion 9 is provided as a connecting portion between the slide metal frame 6 and the drive portion 3. The intermediate connecting portion 9 is a connecting rod 91 having a T-shaped plan view on the slide metal frame side, and can be attached to and detached from the fitting hole 63 of the slide metal frame. Further, the tip of the rod 32 of the hydraulic cylinder 31 is similarly T-shaped in plan view, and is attachable to and detachable from the fitting hole 95 of the intermediate connecting portion. The intermediate connecting portion 9 has three stopper contact surfaces 92, 93, 94 on both sides and the opposite side of the fixed metal frame 5 with the central axis of the rod 32 interposed therebetween. The stopper contact surfaces 92, 93 and 94 are perpendicular to the surface including the sliding surface of the plate.

  As shown in FIG. 13, the stopper 100 has two receiving portions 101, 101, a connecting bar 102 that connects them, and a handle 103 attached to the connecting bar 102. Each receiving portion 101 has a protruding portion 101a that protrudes into the recessed portion 56 (see FIG. 12) of the fixed metal frame. Each receiving portion 101 has a long hole 101 b having a step, and a bolt 104 passes through the long hole, and the bolt is screwed to the intermediate connecting portion 9. The inside of the connecting bar 102 is held by a pin 105 provided with a coil spring 104, and this pin is inserted into the through hole of the intermediate connecting portion 9. The handle 103 is rotatably attached to the connecting bar 102, and a stop plate 103 a is attached to the handle 103.

  That is, when the handle 103 is held and pushed to the fixed metal frame side in the state of FIG. 13, the stopper 100 slides and the protruding portions 101a of the receiving portions 101 protrude from the fixed metal frame side of the intermediate connecting portion 9 (FIG. 14). ). When the handle 103 is rotated, both ends of the stop plate 103a are engaged with the pair of hook portions 96 provided in the intermediate connecting portion 9, and this state is maintained. Since the engagement is released when the handle 103 is returned, the stopper 100 returns to the original state by the force of the coil spring 104, and the protruding portion 101 a is housed in the intermediate connecting portion 9.

  Referring again to FIG. 12, the fixed metal frame 5 is provided with a recess 56 extending in the sliding direction of the slide metal frame, and each protrusion 101 a of the stopper protruding from the intermediate connecting portion 9 slides within the recess 56. It can move in the sliding direction of the gold frame. And in this recessed part 56, the inner wall 56a of the level | step-difference part provided symmetrically with respect to the central axis of the rod 32 can contact | abut with each protrusion part 101a of a stopper.

  As described above, in FIG. 13, when holding the stopper handle 103 and pushing it toward the fixed metal frame side and further rotating to engage the stop plate 103 a with the hook portion 96, the stopper 100 slides to fix the intermediate connection portion 9. The protruding portion 101a of the stopper protrudes from the frame side (FIG. 14). When the hydraulic cylinder 31 is advanced in this state, the protruding portion 101 a of the stopper comes into contact with the inner wall 56 a of the recess 56 provided in the fixed metal frame 5. At the same time, the stopper contact surfaces 92, 93, 94 of the intermediate connecting portion 9 contact the receiving surfaces 106, 107, 108 of the stopper 100 (the three upper surfaces of the two receiving portions 101, 101 and the connecting bar 102). Thus, the drive of the hydraulic cylinder 31 can be stopped, and the slide metal frame 6 is positioned and is in the state shown in FIG. The stopper 100 is attached to the intermediate connecting portion 9 so that it can move a little in the sliding direction of the slide metal frame.

  In this state, the long stroke drive unit is removed and replaced with a short stroke drive unit. The drive portion having a short stroke can be driven within the range of the recessed portion 56 of the fixed metal frame with the stroke range of the stopper 101 protruding from the intermediate connecting portion 9. For this reason, a sliding nozzle apparatus can be used in the state which the protrusion part 101a of the stopper protruded from the intermediate connection part 9 during casting.

  When the surface pressure is released after the casting is finished, the drive unit is replaced with a drive unit having a long stroke in the state shown in FIG. After the replacement, the stopper protrusion 103 a can be accommodated in the intermediate connecting portion 9 by rotating the stopper handle 103. Then, as shown in FIG. 16, the surface pressure is released by setting the drive unit 3 to the forward limit position, and the slide metal frame can be opened.

  As described above, in the third embodiment, since the stopper 100 is held by the connecting portion, there is no need to search for the stopper during the operation, and it is not lost. In addition, when replacing the drive unit with a short stroke, the rod of the drive unit must be fitted to the connecting unit with the forward limit, but at this time, the rod of the drive unit is not limited to the forward limit due to a work mistake. If attached, the slide metal frame may move too much to release the surface pressure. At the time of this replacement, there is a case where molten metal is in the ladle, and there is a problem that steel leakage occurs when the surface pressure is released. However, in the third embodiment, since the moving range of the slide metal frame is limited by the protrusion 101a of the stopper, the surface pressure is not released even if such a mistake occurs.

DESCRIPTION OF SYMBOLS 1 Sliding nozzle apparatus 2 Sliding nozzle apparatus main body 3 Drive part 4 Stopper 5 Fixed metal frame 6 Slide metal frame 7 Opening / closing metal frame 8 Tip connection part 9 Middle connection part 11 Bolt 31 Hydraulic cylinder 32 Rod 33 Substrate 35 Substrate edge 36 Upper surface 37 Lower surface 41, 42 Receiving part 41a, 42a Insertion part
41b, 42b Stepped portion 43 Connecting bar 44 Handle 45, 46, 49 Receiving surface 47, 48 Fixed metal frame contact surface 50 Drive portion holder 51, 52 Groove 53 Space portion 54, 55 Hole 56 Recess 56a Inner wall 60 Slide metal frame side Connecting part 61 Fitting groove 62 Fitting convex part 63 Fitting hole 81 Fitting part 82 Fitting groove 83 Fitting convex part 84, 85 Step part 86, 87 Stopper contact surface 91 Connecting rod 92, 93, 94 Stopper stopper Contact surface 95 Fitting hole 96 Stopping portion 100 Stopper 101 Receiving portion 101a Protruding portion 101b Long hole 102 Connecting bar 103 Handle 103a Stop plate 104 Coil spring 105 Pin 106, 107, 108 Receiving surface

Claims (4)

The slide metal frame of the sliding nozzle device that slides the slide metal frame holding the plate with respect to the fixed metal frame by using two drive units having different strokes when controlling the flow rate of the molten metal and when releasing the surface pressure load. A positioning mechanism,
A stopper is provided on either the connecting part of the drive unit and the slide metal frame or the fixed metal frame,
A contact portion with the stopper is provided on the other of the connecting portion and the fixed metal frame,
The slide metal frame positioning mechanism is configured such that the slide metal frame is positioned by the contact between the stopper and the contact portion. Two stopper contact surfaces are provided on both sides of the connecting part between the drive part and the slide metal frame,
The stopper is provided with two receiving portions having receiving surfaces capable of contacting the two stopper contacting surfaces,
A hole in which the two receiving parts of the stopper can be inserted is provided in the fixed metal frame,
2. The slide metal frame positioning mechanism according to claim 1, wherein a position of the slide metal frame in a sliding direction is positioned by contact between a receiving surface of the stopper and the stopper contact surface. 3.   At the receiving end of the stopper, the base end side of the insertion portion inserted into the hole of the fixed metal frame and opposite to the force receiving side when the slide metal frame is positioned by the drive unit, The slide metal frame positioning mechanism according to claim 2, further comprising a fixed metal frame contact surface capable of contacting the surface of the slide metal frame side. A stopper is provided at the connecting part between the drive part and slide metal frame so that it can protrude in the direction of the fixed metal frame,
The fixed metal frame is provided with a concave portion extending in the sliding direction of the slide metal frame so that the stopper can move.
The slide metal frame positioning mechanism according to claim 1, wherein a position of the slide metal frame in the sliding direction is determined by contact between the stopper and an inner wall of the recess.

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