Scrap temporary receiving device and scrap temporary receiving method

Abstract

To provide a scrap temporary receiving device and a scrap temporary receiving method capable of performing work for discharging scrap from a scrap bag and emptying the scrap bag without stopping a continuous line.SOLUTION: A scrap temporary receiving device 1 temporarily receives scrap S generated by cutting a steel strip in a continuous line, and discharges the temporarily received scrap S to a scrap bag 40. The scrap temporary receiving device 1 includes a casing 10 that is movable between a scrap temporary receiving position and a scrap discharging position, a casing moving device 20 that moves the casing 10 between the scrap temporary receiving position and the scrap discharging position, and a casing tilting device 30 that tilts the casing 10 at the scrap discharging position from a scrap receiving posture to discharge the scrap S placed on a floor portion 11 from a scrap discharging opening 16 of the casing 10 to a scrap bag 40.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a scrap temporary receiving device and scrap temporary receiving method that temporarily receives scrap generated by cutting metal material during transportation and discharges the temporarily received scrap into a scrap bag. [Background technology]

[0002] In the manufacturing process of metal materials, cutting processes are performed on the longitudinal and widthwise ends of the metal material. This applies whether the metal material before cutting is in the form of a cut sheet such as a thick steel plate or a coiled steel strip. When cutting the longitudinal ends, i.e., the non-constant portions of the leading and trailing ends, the resulting cutting chips are called, for example, crops. When cutting the widthwise ends, i.e., the non-constant portions of the width edges, the resulting cutting chips are called, for example, trim chips or edge chips. Trim chips and edge chips are often cut into predetermined lengths for easy handling. When processing coiled metal strips on a continuous line, for example, when processing steel strips on a continuous line such as a pickling line, the trailing end of the leading steel strip and the leading end of the trailing steel strip are both cut by a cutting device such as a shear and then welded to form a continuous steel strip.

[0003] Scrap includes crops generated by cutting the leading and trailing ends of metal materials, and trimmings generated by cutting the widthwise edges of metal materials. Scrap generated by cutting metal materials is generally transported by a belt conveyor or chute and discharged into a scrap bag located at a fixed position outside the line, such as next to the line. When scraps such as crops accumulate in the scrap bag, the bag is lifted by a crane and the scraps are discharged onto the back of a truck, etc. After the scraps have been discharged, the scrap bag is returned to its original position.

[0004] Patent Document 1 proposes a conveyor system equipped with a plurality of conveyors for transporting scrap steel (crops) generated when hot-rolled steel plates are sheared. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-144582 Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, scrap is also generated when metal cutting operations are performed while lifting scrap bags with a crane and discharging the scrap onto truck beds, etc. For example, when a continuous line that processes steel strips is in operation, the leading and trailing ends of the steel strips are cut off, generating scrap.

[0007] In order to continue operating a continuous line that processes steel strips, for example, even while scrap is being discharged from the scrap bag onto the bed of a truck, it is necessary to prevent scrap, such as crops generated by cutting off the leading or trailing ends of the steel strip, from falling into its designated position in the scrap bag.

[0008] When scraps such as crops are transported by a belt conveyor, as in the conveyor equipment shown in Patent Document 1, the generated scraps are not discharged to a designated location in a scrap bag when the belt conveyor is stopped. However, if scraps accumulate on the belt conveyor, there is a risk that the pile of scraps will collapse and fall to the surrounding area.

[0009] Furthermore, when scrap such as crops is transported through a chute, a mechanism for blocking the scrap on the chute can be installed to prevent the generated scrap from being transported to a designated location in the scrap bag. However, such a blocking mechanism is complex and expensive. Furthermore, once the scrap is blocked by the blocking mechanism, it may be difficult for it to slide back down the chute simply by releasing the blocking mechanism.

[0010] For this reason, when a crane lifts a scrap bag and discharges the scrap onto a truck bed or other location, the continuous line must be stopped until the scrap bag is returned to its original position. Having to stop the line to discharge scrap is not a problem unique to continuous lines that process steel strip. For example, even when cutting the width edges of thick steel plates while they are being transported, the cutting of the width edges of the thick steel plates must be interrupted depending on the timing of scrap discharge. Because these continuous line stoppages and interruptions to cutting operations directly lead to a decrease in production efficiency, improvements in scrap discharge operations were needed.

[0011] Therefore, the present invention has been made to solve this conventional problem, and its object is to provide a scrap temporary holding device and scrap temporary holding method that make it possible to empty the scrap bag by discharging scrap from it without stopping the continuous line or the transport of the material to be cut, for example. [Means for solving the problem]

[0012] The inventors of the present invention have studied the example of cutting a steel strip on a continuous line as an example of cutting a metal material while it is being conveyed, and have come up with the idea that the above-mentioned problems can be solved by temporarily receiving the scrap generated by cutting the steel strip on the continuous line before it is conveyed to a scrap bag, and then moving the temporarily received scrap close to the scrap bag and discharging it into the scrap bag.

[0013] That is, in order to solve the above-mentioned problems, a scrap temporary holding device according to one aspect of the present invention is a scrap temporary holding device that temporarily holds scrap generated by cutting metal material being conveyed and discharges the temporarily held scrap into a scrap bag, and is a housing that is movable between a scrap temporary holding position and a scrap discharge position, and is provided with a scrap receiving opening that opens upward to receive the scrap at the scrap temporary holding position, a floor portion on which the scrap received from the scrap receiving opening is placed, and a scrap discharge opening that opens to one side to discharge the scrap placed on the floor portion, and the floor portion is The gist of the present invention is that the apparatus comprises a base material that is inclined with respect to a horizontal plane so that, in a scrap receiving position for receiving scrap, the end portion on the scrap discharge opening side is higher than the end portion on the opposite side from the scrap discharge opening side; a housing that is placed on the surface of the base material and has a slidable rotor with the scrap placed on it; a housing moving device that moves the housing between the scrap temporary receiving position and the scrap discharge position; and a housing tilting device that tilts the housing in the scrap discharge position from the scrap receiving position to discharge the scrap placed on the floor portion through the scrap discharge opening of the housing into the scrap bag.

[0014] Another aspect of the present invention is a scrap temporary holding method that uses the above-mentioned scrap temporary holding device to temporarily hold scrap generated by cutting metal material during transport and discharge the temporarily held scrap into a scrap bag, and the gist of this method is that when the housing, which is in the scrap discharge position, is tilted from the scrap receiving position to discharge the scrap placed on the floor portion into the scrap bag through the scrap discharge opening of the housing, the scrap is discharged with the tip of the scrap discharge opening located 300 mm or more inside the end of the scrap bag. [Effects of the Invention]

[0015] The scrap temporary holding device and scrap temporary holding method of the present invention can provide a scrap temporary holding device and scrap temporary holding method that make it possible to empty scrap from a scrap bag without stopping the metal material being transported or the continuous line. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a front view of a scrap temporary receiving device according to an embodiment of the present invention, showing a state in which the housing is in a scrap temporary receiving position, although in FIG. 1 the housing and scrap bag are shown in cross section. [Figure 2] 2 is a front view of a scrap temporary receiving device according to an embodiment of the present invention, showing the housing in the scrap discharge position, although the housing and scrap bag are shown in cross section in FIG. [Figure 3] 2 is a front view of a scrap temporary receiving device according to an embodiment of the present invention, showing a state in which the housing is tilted in the scrap discharge position, although in FIG. 2 the housing and scrap bag are shown in cross section. [Figure 4] 4 is a left side view of the scrap temporary receiving device in the state shown in Fig. 1. However, in Fig. 4, the scrap bag is not shown. [Figure 5] FIG. 3 is a plan view of the scrap temporary receiving device in the state shown in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments shown below are examples of devices and methods for embodying the technical concept of the present invention, and the technical concept of the present invention is not limited to the following embodiments in terms of the materials, shapes, structures, arrangements, etc. of the components.

[0018] In addition, the drawings are schematic, and therefore it should be noted that the relationship between thickness and planar dimensions, ratios, etc. may differ from the actual relationship, and the drawings may also contain parts where the relationship and ratio of dimensions differ from each other.

[0019] In the present invention, "cutting a metal material being conveyed" includes both cutting a moving metal material being conveyed and cutting the metal material while it is stopped temporarily for cutting work during the conveying process. Also, "cutting a steel strip on a continuous line that processes steel strips" includes both cutting a moving steel strip being conveyed on the continuous line and cutting the steel strip while it is stopped temporarily for cutting work during the conveying process.

[0020] Figures 1 to 3 respectively show a state in which the housing of a scrap temporary holding device according to one embodiment of the present invention is in the scrap temporary holding position, a state in which the housing is in the scrap discharge position, and a state in which the housing in the scrap discharge position is tilted. As an example of application of the present invention to the work of cutting metal material being conveyed, the case of cutting a steel strip in a pickling line, which is one of the continuous lines, will be described below.

[0021] The scrap temporary storage device 1 shown in FIGS. 1 to 3 temporarily stores scrap S generated by cutting a steel strip in a pickling line, and discharges the temporarily stored scrap S into a scrap bag 40.

[0022] The pickling line, which is one of the continuous lines, has a pass line PL extending in the front-to-rear direction as shown in Figures 4 and 5. The leading and trailing ends of a steel strip (not shown) conveyed in the front-to-rear direction indicated by arrow A are cut by a shear (not shown). The scrap S generated by the cutting is temporarily received in a scrap temporary receiving device 1, and the scrap S temporarily received in the scrap temporary receiving device 1 is discharged into a scrap bag 40.

[0023] The scrap temporary receiving device 1 includes a housing 10, a housing moving device 20, and a housing tilting device 30. The housing 10 is installed below the pass line PL of the pickling line so as to be able to move back and forth in the left-right direction perpendicular to the pass line PL between the scrap temporary receiving position shown in FIG. 1 and the scrap discharge position shown in FIG. 2.

[0024] Here, the "scrap temporary receiving position" is, as shown in Figure 1, below the pass line PL of the pickling line, and is the position where the housing 10 receives the scrap S that is generated when the steel strip is cut by the shear and falls down while being guided by the guide plate 50.

[0025] In addition, the "scrap discharge position" is a position to the left of the scrap temporary receiving position, close to the scrap bag 40, and is a position where the operation of discharging scrap S into the scrap bag 40 from the scrap discharge opening 16 described below is performed by tilting the housing 10 using the housing tilting device 30, as shown in Figure 3.

[0026] The housing 10 includes a floor 11, a front wall 12 (see FIG. 4) rising from the front edge of the floor 11, a rear wall 13 rising from the rear edge of the floor 11, and a right side wall 14 rising from the right edge of the floor 11. The space defined by the front wall 12, rear wall 13, and right side wall 14 opens upward, and this upward opening forms a scrap receiving opening 15 for receiving scrap S at the scrap temporary receiving position. In addition, the space defined by the front wall 12, rear wall 13, and right side wall 14 of the housing 10 also opens to the left (one side), and this left opening forms a scrap discharge opening 16 for discharging scrap S placed on the floor 11.

[0027] The scrap S received through the scrap receiving opening 15 is placed on the floor 11 of the housing 10.

[0028] The floor portion 11 includes a base material 11a formed of a rectangular flat plate, and a plurality of rotors 11b arranged on the surface of the base material 11a and capable of sliding with the scrap S placed thereon. As shown in Figure 1, the base material 11a is inclined with respect to the horizontal plane so that, when in the scrap receiving position for receiving scrap S at the scrap temporary receiving position, the end 11c on the scrap discharge opening 16 side (left side) is higher than the end 11d on the opposite side (right side) from the scrap discharge opening 16 side.

[0029] The "scrap receiving position" is the position of the casing 10 when the casing 10 receives the scrap S at the scrap temporary receiving position. The reason why the base material 11a of the floor portion 11 is inclined in this manner in the scrap receiving position is as follows.

[0030] First, as shown in Figures 1 and 4, when the scrap S falls from the guide plate 50 into the housing 10, the end 11c on the scrap discharge opening 16 side is higher than the end 11d on the opposite side from the scrap discharge opening 16 side in the scrap receiving position, so there is less chance that the scrap S will fly out of the scrap discharge opening 16.

[0031] Furthermore, when the scraps S fall onto the base material 11a, if the base material 11a is tilted, the scraps S move downward (toward the side opposite the scrap discharge opening 16 on the base material 11a). As a result, the scraps S are stacked closer to the lower side of the base material 11a (the side opposite the scrap discharge opening 16 on the base material 11a) than when the base material 11a is not tilted. If the scraps S are stacked evenly on the base material 11a, the arrangement of the scraps S when they fall into the scrap bag 40 will be neater than when they are not evenly stacked, and the scrap filling rate in the scrap bag 40 will be higher. This also improves the efficiency of the process of discharging the scraps S from the scrap bag 40.

[0032] Here, the inclination angle of the base material 11a relative to the horizontal plane in the scrap receiving orientation is preferably 5 degrees or more and 30 degrees or less, and more preferably 10 degrees or more and 12 degrees or less. If the inclination angle is less than 5 degrees, the scrap S may slide on the base material 11a and fall out of the housing 10 (scrap discharge opening 16) due to the impact when it falls from the guide plate 50, or two or more scraps S may not be neatly stacked. On the other hand, if the inclination angle exceeds 15 degrees, the operating time of the housing tilting device 30 may increase, which may reduce production efficiency.

[0033] The plurality of rotating bodies 11b are arranged in a matrix on the surface of the substrate 11a as shown in Fig. 5. Each rotating body 11b may be spherical or roll-shaped (cylindrical or columnar). The type and size of each rotating body 11b may be selected appropriately depending on the surface properties and weight of the scrap S to be processed so as to achieve appropriate sliding.

[0034] In addition, in the housing 10, a plurality of (two in this embodiment) support plate portions 17 extending elongatedly in the left-right direction are protruded from the underside of the base material 11a of the floor portion 11. Each support plate portion 17 is formed so that its vertical height gradually decreases from the left end to the right end. As shown in FIGS. 1 to 4, the vicinity of the left end of each support plate portion 17 is rotatably supported by a shaft member 26 on a housing support plate 25 provided on a transport carriage 21 of a housing moving device 20 (described later). In addition, as shown in FIGS. 1 to 4, a rectangular flat tilting plate portion 18 extending horizontally in a scrap receiving attitude is provided on the underside of the plurality of support plate portions 17.

[0035] In addition, the housing moving device 20 moves the housing 10 between the scrap temporary receiving position shown in Figure 1 and the scrap discharge position shown in Figure 2, and is equipped with a transport cart 21 on which the housing 10 is mounted and a drive cylinder 27.

[0036] The transport vehicle 21 moves back and forth between a scrap temporary receiving position and a scrap discharge position on a pair of rails 29 extending laterally perpendicular to the pass line PL of the pickling line. The transport vehicle 21 is formed in the shape of a horizontally extending rectangular flat plate, and wheel support plates 22 are provided near each of the square corners on its underside. Wheels 24 are rotatably supported on each wheel support plate 22 by axles 23. Each wheel 24 runs on the rails 29. Near the left end of the top surface of the transport vehicle 21, multiple (two in this embodiment) housing support plates 25 are provided, which rotatably support the support plate portion 17 of the housing 10 by axle members 26. The tilting plate portion 18 of the housing 10 is placed on the top surface of the transport vehicle 21 when the housing 10 is in the scrap receiving position at the scrap temporary receiving position. The transporting platform 21 has a through hole 21a through which a second link 36 and a rotating roller 37 of the housing tilting device 30 (described later) can be inserted vertically. Each rail 29 is supported on the ground by a plurality of supports 29a.

[0037] The drive cylinder 27 reciprocates the transport vehicle 21 between a scrap temporary receiving position and a scrap discharge position, and includes a cylinder tube 27a and a cylinder rod 27b. The cylinder tube 27a is supported by an intermediate support portion 28. The tip of the cylinder rod 27b is journaled by a shaft portion 21c to a cylinder support portion 21b provided near the left end of the underside of the transport vehicle 21, and the drive cylinder 27 can extend and retract in the left-right direction between a first position where the transport vehicle 21 is in the scrap temporary receiving position and a second position where the transport vehicle 21 is in the scrap discharge position.

[0038] When the transport vehicle 21 is in the scrap temporary receiving position, the cylinder rod 27b of the drive cylinder 27 is in a retracted state and at a first position, as shown in Fig. 1. When the transport vehicle 21 is in the scrap discharge position, the cylinder rod 27b is extended to the left and at a second position and at an extended state, as shown in Fig. 2. The drive cylinder 27 may be powered by, for example, hydraulic pressure, compressed air, or electricity.

[0039] In addition, as shown in Figure 3, the housing tilting device 30 tilts the housing 10, which is in the scrap discharge position, from the scrap receiving position, and discharges the scrap S placed on the floor 11 from the scrap discharge opening 16 of the housing 10 into the scrap bag 40.

[0040] The housing tilting device 30 includes a tilting cylinder 31, a first link 34, and a second link 36. The tilting cylinder 31 includes a cylinder tube 31a and a cylinder rod 31b. The cylinder tube 31a is supported by an intermediate support portion 32. The cylinder rod 31b is extendable and retractable in the left-right direction between a first position shown in FIG. 1 and a second position shown in FIG. 3. One end of the first link 34 is rotatably supported by a shaft portion 33 at the tip of the cylinder rod 31b, and the other end is fixed to a rotation shaft 35, rotating together with the rotation shaft 35 about the rotation shaft 35. One end of the second link 36 is fixed to the rotation shaft 35, rotating together with the rotation shaft 35 about the rotation shaft 35, and a rotary roller 37 is rotatably supported at the other end. When tilting the housing 10, which is in the scrap discharge position, from the scrap receiving position, the rotating roller 37 pushes the tilting plate portion 18 of the housing 10 from the bottom to the top, as shown in Figure 3, causing the housing 10 to rotate counterclockwise around the shaft member 26.

[0041] When the transport vehicle 21 is in the scrap temporary receiving position, the cylinder rod 31b of the tilting cylinder 31 is extended and in the first position, as shown in Figure 1. At this time, the first link 34 is rotated clockwise together with the rotating shaft 35 so that one end of the first link 34 is positioned leftward by the cylinder rod 31b. In addition, the second link 36 rotates clockwise together with the rotating shaft 35, and the rotating roller 37 at the other end is positioned below the transport vehicle 21.

[0042] When the transport vehicle 21 moves to the scrap discharge position and tilts the housing 10 from the scrap receiving position to discharge the scrap S into the scrap bag 40, the cylinder rod 31b of the tilting cylinder 31 retracts to the right, assuming a second position (retracted state), as shown in FIG. 3 . At this time, the first link 34 rotates counterclockwise together with the rotating shaft 35, with one end of the first link 34 positioned to the right by the cylinder rod 31b. The second link 36 also rotates counterclockwise together with the rotating shaft 35, and the rotating roller 37 at the other end protrudes from the through-hole 21a of the transport vehicle 21 and pushes the tilting plate 18 of the housing 10 upward, rotating the housing 10 counterclockwise around the shaft member 26. The tilting cylinder 31 may be powered by, for example, hydraulic pressure, compressed air, or electricity.

[0043] When discharging scraps S into the scrap bag 40, the inclination angle of the base 11a relative to the horizontal plane when the housing 10, which is in the scrap discharge position, is tilted from the scrap receiving position is preferably 15 degrees to 30 degrees, more preferably 15 degrees to 25 degrees. If the inclination angle is less than 15 degrees, the scraps S do not fly far enough into the scrap bag 40, and the scraps S may accumulate at the entrance of the scrap bag 40 (near the right side plate 45, described below). This increases the frequency of replacing the scrap bag 40 and reduces production efficiency. On the other hand, if the inclination angle is greater than 30 degrees, the scraps S fly out of the housing 10 toward the entrance rather than the back of the scrap bag 40, and the scraps S do not fly to the back of the scrap bag 40. As a result, the scraps S become stuck on the upper surface of the bottom plate 41, described below, of the scrap bag 40 near the entrance of the scrap bag 40 (near the right side plate 45, described below). This may result in a decrease in the packing density of the scrap S in the scrap bag 40, an increase in the frequency of replacing the scrap bag 40, and a decrease in production efficiency.

[0044] 1 to 3, the scrap bag 40 is placed below the pass line PL of the pickling line, to the left of the left end of the scrap temporary receiving device 1 (the left end of the rail 29). The scrap bag 40 includes a rectangular, flat bottom plate 41, a front plate 42 (see FIG. 5) rising from the front edge of the bottom plate 41, a rear plate 43 rising from the rear edge of the bottom plate 41, a left plate 44 rising from the left edge of the bottom plate 41, and a right plate 45 rising diagonally upward and to the right from the right edge of the bottom plate 41. The space defined by the front plate 42, the rear plate 43, the left plate 44, and the right plate 45 is open upward, and this upward opening forms a crop receiving opening 46 for receiving scraps S.

[0045] As shown in FIGS. 1 to 3, the scrap temporary receiving device 1 is also provided with a drive control device 60 and an operation device 70. The drive control device 60 is connected to the drive cylinder 27 of the housing moving device 20 and the tilting cylinder 31 of the housing tilting device 30, and controls the operations of the drive cylinder 27 and the tilting cylinder 31, respectively.

[0046] In addition, the operating device 70 allows the operator to operate the drive control device 60 by turning the switch ON to operate each of the drive cylinder 27 and the tilting cylinder 31, and to put the drive control device 60 in an inoperative state by turning the switch OFF.

[0047] Next, a scrap temporary holding method will be described in which the scrap temporary holding device 1 is used to temporarily hold the scrap S generated by cutting a steel strip in a pickling line and the temporarily held scrap S is discharged into the scrap bag 40.

[0048] When cutting the leading or trailing end of a steel strip by a shear (not shown) in a pickling line, the housing 10 and the transport cart 21 are positioned at the scrap temporary receiving position, as shown in Fig. 1. At this time, the cylinder rod 27b of the drive cylinder 27 is in a contracted state and at the first position. Also, the cylinder rod 31b of the tilting cylinder 31 is in an extended state and at the first position.

[0049] Then, the scrap S cut by the shear in the pickling line is guided on the guide plate 50 and falls into the housing 10, as shown in Figures 1 and 4. As the scrap S falls, it is received into the housing 10 through the scrap receiving opening 15 of the housing 10, and is placed on the floor 11 and temporarily held (scrap temporary holding process). This scrap temporary holding process continues until a predetermined number of scraps S are temporarily held inside the housing 10.

[0050] Here, in the scrap temporary receiving position of the casing 10, the base material 11a of the floor 11 is inclined with respect to the horizontal plane so that, in the scrap receiving position, the end 11c on the scrap discharge opening 16 side (left side) is higher than the end 11d on the opposite side (right side) from the scrap discharge opening 16 side. This reduces the possibility of the scrap S flying out of the scrap discharge opening 16 when the scrap S falls into the casing 10 from the guide plate 50 in the scrap receiving position. Furthermore, when the scrap S falls onto the base material 11a, if the base material 11a is inclined as described above, the scrap S moves downward (toward the side opposite the scrap discharge opening 16 on the base material 11a). As a result, the scrap S is stacked closer to the lower side of the base material 11a (toward the side opposite the scrap discharge opening 16 on the base material 11a) than when the base material 11a is not inclined. When the scraps S are stacked uniformly on the base material 11a, the arrangement of the scraps S becomes neater when the scraps S drop into the scrap bag 40, and the scrap filling rate in the scrap bag 40 becomes higher, compared to when the stacking state is not uniform.

[0051] Then, when a predetermined number of scraps S are temporarily received inside the housing 10, the worker turns on the switch on the operating device 70. This causes the drive control device 60 to control the cylinder rod 27b of the drive cylinder 27 to extend leftward to the second extended position, as shown in Fig. 2. This causes the transport vehicle 21 to move to the scrap discharge position, and the housing 10 moves to the scrap discharge position together with the movement of the transport vehicle 21 (housing movement process).

[0052] After the transport vehicle 21 and the housing 10 move to the scrap discharge position, the drive control device 60 controls the cylinder rod 31b of the tilting cylinder 31 to retract to the right, as shown in FIG. 3, to the second position. As a result, the first link 34 rotates counterclockwise together with the rotating shaft 35 so that one end of the first link 34 is positioned rightward by the cylinder rod 31b. The second link 36 also rotates counterclockwise together with the rotating shaft 35, and the rotating roller 37 at the other end protrudes from the through-hole 21a of the transport vehicle 21 and pushes the tilting plate 18 of the housing 10 upward from below, rotating the housing 10 counterclockwise around the shaft member 26 and tilting the housing 10 from the scrap receiving position (the housing tilting step). As a result, the scrap S placed on the floor 11 slides on the rotating body 11b of the floor 11 and is discharged from the scrap discharge opening 16 of the housing 10 into the scrap bag 40 (the scrap discharging step).

[0053] When tilting the housing 10 from the scrap receiving position to discharge scrap S placed on the floor 11 through the scrap discharge opening 16 of the housing 10 into the scrap bag 40, it is preferable to discharge the scrap S with the leading edge 16a of the scrap discharge opening 16 located 300 mm or more inside the edge of the scrap bag 40 (the upper edge 45b of the inner surface 45a of the right side plate 45). That is, as shown in FIG. 3, it is preferable to discharge the scrap S with the horizontal distance d between the leading edge 16a of the scrap discharge opening 16 and the upper edge 45b of the inner surface 45a of the right side plate 45 of the scrap bag 40 being 300 mm or more. It is particularly preferable that this horizontal distance d be 500 mm or more.

[0054] This prevents the scraps S from flying to the back of the scrap bag 40 when the scraps S are discharged and from getting stuck on the bottom plate part 41 of the scrap bag 40 just before the scrap bag 40, thereby preventing the scraps S from obstructing the movement of the following scraps S.

[0055] Furthermore, as described above, when discharging the scrap S into the scrap bag 40, the inclination angle of the base 11a with respect to the horizontal plane when the housing 10, which is in the scrap discharge position, is tilted from the scrap receiving position is preferably 15 degrees or more and 30 degrees or less, and more preferably 15 degrees or more and 25 degrees or less. If the inclination angle is less than 15 degrees, the scrap S will not fly far enough into the scrap bag 40, and the scrap S may accumulate at the entrance of the scrap bag 40 (around the right side plate portion 45), which may increase the frequency of replacing the scrap bag 40 and reduce production efficiency. On the other hand, if the inclination angle is more than 30 degrees, the scrap S will fly out of the housing 10 toward the entrance rather than the back of the scrap bag 40, and the scrap S will not fly to the back of the scrap bag 40.

[0056] Furthermore, floor 11 is disposed on the surface of base material 11a and is provided with rotating body 11b that can slide along scrap S placed thereon, so that scrap S placed on floor 11 is discharged from scrap discharge opening 16 of housing 10 into scrap bag 40 while sliding on rotating body 11b of floor 11. This allows scrap S to fly to the back of scrap bag 40 without slowing down the discharge speed of scrap S.

[0057] Then, the scrap bag 40 filled with the predetermined number of scraps S is lifted by a crane (not shown) and transported to a discharge location such as the bed of a truck, where all of the scraps S inside the scrap bag 40 are discharged. After all of the scraps S have been discharged, the empty scrap bag 40 is returned to its original position by the crane.

[0058] Meanwhile, after the scraps S are discharged into the scrap bag 40 (after a predetermined time has elapsed since the cylinder rod 31b of the tilting cylinder 31 was controlled to be in the second position in a retracted state), the drive control device 60 controls the cylinder rod 31b of the tilting cylinder 31 to extend it to the first position in an extended state, as shown in FIG. 2. As a result, the first link 34 is rotated clockwise together with the rotating shaft 35 so that one end of the first link 34 is positioned leftward by the cylinder rod 31b. In addition, the second link 36 rotates clockwise together with the rotating shaft 35, and the rotating roller 37 at the other end is positioned below the transport cart 21. As a result, the housing 10 assumes a scrap receiving position, and the tilted state of the housing 10 is released (housing tilt release process).

[0059] Thereafter, the drive control device 60 controls the cylinder rod 27b of the drive cylinder 27 to retract to the right side to the first position in a retracted state, as shown in Fig. 1. As a result, the transport vehicle 21 moves to the scrap temporary holding position, and the casing 10 moves to the scrap temporary holding position along with the movement of the transport vehicle 21, returning to its original state (casing return process). Once the casing 10 has returned to its original state, the worker turns off the switch on the operating device 70, putting the drive control device 60 into a non-operating state.

[0060] Here, the housing 10, the housing moving device 20, and the housing tilting device 30 operate at high speed so that the time it takes for the housing 10 to move from the scrap temporary holding position to the scrap discharge position, tilt to discharge the scrap S into the scrap bag 40, and then move back to the scrap temporary holding position and return to its original state is shorter than the time it takes to cut the front end of a steel strip and then cut the rear end of that steel strip.

[0061] Therefore, the scrap temporary receiving device 1 can temporarily receive the scrap S cut in the pickling line and discharge the temporarily received scrap S into the scrap bag 40 without stopping the pickling line, which is a continuous line. The scrap S generated while the scrap bag 40 is being emptied by crane operation can be temporarily stored in the scrap temporary storage device 1.

[0062] Therefore, there is no need to stop the pickling line, which is a continuous line, even while the scrap bag is being emptied by crane operation.

[0063] In this way, the scrap temporary holding device 1 according to this embodiment temporarily holds scrap S generated by cutting steel strips in a continuous pickling line, and discharges the temporarily held scrap S into a scrap bag 40. The scrap temporary holding device 1 is a housing 10 that can move between a scrap temporary holding position and a scrap discharge position, and is equipped with a scrap receiving opening 15 that opens upward to receive scrap S at the scrap temporary holding position, a floor 11 on which the scrap S received through the scrap receiving opening 15 is placed, and a scrap discharge opening 16 that opens to one side (left) to discharge the scrap S placed on the floor 11. The floor 11 also includes a base 11a that is inclined with respect to the horizontal plane so that, when in a scrap receiving position for receiving the scrap S, an end 11c on the scrap discharge opening 16 side is higher than an end 11d on the opposite side from the scrap discharge opening 16 side, and a rotor 11b that is placed on the surface of the base 11a and is capable of sliding with the placed scrap S. The scrap temporary holding device 1 also includes a housing moving device 20 that moves the housing 10 between the scrap temporary holding position and the scrap discharge position, and a housing tilting device 30 that tilts the housing 10, which is in the scrap discharge position, from the scrap receiving position to discharge the scrap S placed on the floor 11 through the scrap discharge opening 16 of the housing 10 into a scrap bag 40.

[0064] This makes it possible to empty the scrap bag 40 by discharging the scrap S without stopping the pickling line, which is a continuous line.

[0065] Furthermore, according to the scrap temporary holding device 1 of this embodiment, when the scrap S is discharged into the scrap bag 40, the inclination angle of the base material 11a relative to the horizontal plane when the housing 10, which is in the scrap discharge position, is tilted from the scrap receiving position is 15 degrees or more and 30 degrees or less. This increases the flying distance of the scrap S into the scrap bag 40, and prevents the scrap S from accumulating at the entrance of the scrap bag 40, which increases the frequency of replacing the scrap bag 40 and reduces production efficiency.

[0066] Furthermore, according to the scrap temporary holding method of this embodiment, the scrap temporary holding device 1 is used to temporarily hold the scrap S generated by cutting the steel strip in the pickling line, which is a continuous line, and the temporarily held scrap S is discharged into the scrap bag 40. This makes it possible to empty the scrap bag 40 by discharging the scrap S without stopping the pickling line, which is a continuous line.

[0067] In this scrap temporary holding method, when the housing 10 in the scrap discharge position is tilted from the scrap receiving position to discharge the scrap S placed on the floor 11 into the scrap bag 40 through the scrap discharge opening 16 of the housing 10, the scrap S is discharged in a state where the tip 16a of the scrap discharge opening 16 is 300 mm or more inside the end of the scrap bag 40 (the upper end 45b of the inner surface 45a of the right side plate portion 45). This prevents the scraps S from flying to the back of the scrap bag 40 when the scraps S are discharged and from getting stuck on the bottom plate part 41 of the scrap bag 40 just before the scrap bag 40, thereby preventing the scraps S from obstructing the movement of the following scraps S.

[0068] Although the embodiment of the present invention has been described above, the present invention is not limited to this and various modifications and improvements can be made. For example, the scrap temporary holding device 1 may be configured to temporarily hold scrap generated by cutting steel strips in a continuous line other than a pickling line, such as a hot rolling line, a cold rolling line, a plating line, or a surface treatment line.

[0069] In addition to continuous lines for processing steel strips, the present invention can also be applied to scrap generated by shearing or cutting the leading or trailing ends or non-steady portions of widthwise ends of cut metal materials such as thick steel plates. [Explanation of symbols]

[0070] 1 Scrap temporary holding device 10. Cabinet 11 Floor 11a Base material 11b Rotating body 11c End portion on the scrap discharge opening side 11d End opposite to the scrap discharge opening 12 Front wall 13 Back wall 14 Right side wall 15 Scrap receiving opening 16 Scrap discharge opening 16a tip 17 Support plate part 18 Tilting plate 20. Housing moving device 21 Transport cart 21a Through hole 21b Cylinder support 21c Shaft 22 Wheel support plate 23 Shaft 24 wheels 25 Housing support plate 26 Shaft member 27 Drive cylinder 27a Cylinder tube 27b Cylinder rod 28 Intermediate support 29 Rail 29a Support part 30. Housing tilting device 31 Tilting cylinder 31a Cylinder tube 31b Cylinder rod 32 Intermediate support part 33 Shaft 34 First Link 35 Rotation axis 36 Second Link 37 Rotating Roller 40 Scrap Bag 41 Bottom plate part 42 Front plate part 43 Rear plate part 44 Left side plate 45 Right side plate 45a Inner surface 45b Upper end 46 Scrap receiving opening 50 Signboard 60 Drive control device 70 Operating device S Scrap

Claims

1. A scrap temporary receiving device that temporarily receives scrap generated by cutting metal materials being conveyed and discharges the temporarily received scrap into a scrap bag, a housing movable between a scrap temporary receiving position and a scrap discharge position, the housing comprising: a scrap receiving opening that opens upward to receive the scrap at the scrap temporary receiving position; a floor portion on which the scrap received through the scrap receiving opening is placed; and a scrap discharge opening that opens to one side to discharge the scrap placed on the floor portion, the floor portion comprising a base material that is inclined with respect to a horizontal plane so that an end portion on the scrap discharge opening side is higher than an end portion on the opposite side to the scrap discharge opening side when in the scrap receiving position to receive the scrap; and a rotating body that is placed on the surface of the base material and is slidable with the scrap placed thereon; a housing moving device that moves the housing between the scrap temporary receiving position and the scrap discharge position; a housing tilting device that tilts the housing, which is in the scrap discharge position, from the scrap receiving position to discharge the scrap placed on the floor portion into the scrap bag through the scrap discharge opening of the housing.

2. 2. The scrap temporary holding device according to claim 1, characterized in that when the scrap is discharged into the scrap bag, the inclination angle of the base material with respect to the horizontal plane when the housing, which is in the scrap discharge position, is tilted from the scrap receiving position is 15 degrees or more and 30 degrees or less.

3. 3. A scrap temporary holding method using the scrap temporary holding device according to claim 1 or 2 to temporarily hold scrap generated by cutting a steel strip in a continuous line and to discharge the temporarily held scrap into a scrap bag, A crop temporary holding method characterized in that when the housing, which is in the scrap discharge position, is tilted from the scrap receiving position to discharge scrap placed on the floor portion through the scrap discharge opening of the housing into the scrap bag, the scrap is discharged while the tip of the scrap discharge opening is at least 300 mm inside the end of the scrap bag.

4. 4. The scrap temporary holding method according to claim 3, wherein the scrap to be temporarily held is scrap generated by cutting a steel strip on a continuous line.

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