Cutting piece discharge device and method for recovering cutting pieces

Abstract

To recover cut pieces into a cut piece recovery box in a more reliable manner.SOLUTION: A crop piece discharge device has a crop chute 2 which guides crop pieces of a metal plate cut by a cutting machine downward and causes the crop pieces to be recovered into a crop piece recovery box which is open at an upper part. In a top view, a lower end 2A of the crop chute 2 is arranged so as to overlap with the crop piece recovery box. Further, the crop piece discharge device includes a contact prevention body 6 which is arranged between the lower end 2A of the crop chute 2 and the crop piece recovery box 3 and contacts with the crop piece recovery box before the crop piece recovery box 3 contacts with the lower end 2A of the crop chute 2 when the crop piece recovery box 3 is displaced upward.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a cut piece discharging device for guiding cut metal cut pieces to a cut piece recovery box via a guide path and recovering the cut pieces in the cut piece recovery box, and a cut piece recovery method using the cut piece discharging device. Furthermore, the present invention is a technique suitable for discharging crop pieces generated in rolling equipment such as hot rough rolling and skin pass rolling. [Background Art]

[0002] In rolling equipment, as described in Patent Document 1, Patent Document 2 and the like, cut crop pieces fall onto a crop chute that constitutes an inclined path (guide path), and are sequentially placed on the crop chute. The crop pieces placed on the crop chute are guided by the crop chute to fall downward, and fall into the crop piece recovery box from the lower end of the crop chute. Thereby, the crop pieces are sequentially recovered into the crop piece recovery box.

[0003] When the crop piece recovery box is full of crop pieces, or when it becomes necessary to sort steel grades, the crop piece recovery box is replaced. This replacement work of the crop piece recovery box is performed by conveying the crop piece recovery box containing crop pieces to another area, and placing a new crop piece recovery box at the crop piece recovery position.

[0004] It should be noted that the crop piece recovery box containing crop pieces is a heavy object. There are a plurality of recovery methods for conveying (recovering) this heavy crop piece recovery box.

[0005] As one of the recovery methods, there is a method of recovering the crop piece recovery box by lifting it with a crane. In this recovery method, the tip end (hook part) of the crane's sling (wire or chain) is hooked on the crop piece recovery box to lift the crop piece recovery box (see FIG. 1). Then, the crop piece recovery box is conveyed to another area. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2009-61457 [Patent Document 2] Japanese Patent Application Publication No. 10-109219 [Overview of the project] [Problems that the invention aims to solve]

[0007] In general, the tip surface of the lower end of the crop chute is designed to be flush with the vertically extending mounting surface. The crop piece collection box is positioned close to the mounting surface and in contact with it. The mounting surface regulates the position of the crop piece collection box on the crop chute side.

[0008] In this case, a gap may form between the lower end of the crop chute and the crop fragment collection box when viewed from above. If a gap forms, some crop fragments will not be collected in the crop fragment collection box and will fall onto the floor where the crop fragment collection box is installed. If this continues, the gap between the crop fragment collection box and the lower end of the crop chute will widen further, which may cause the line to stop.

[0009] This invention was made in view of these points, and aims to enable more reliable collection of the cut pieces into the cut piece collection box. [Means for solving the problem]

[0010] The inventors considered how to more reliably collect the cut pieces into the piece collection box. They considered extending the lower end of the guide path into the piece collection box when viewed from above.

[0011] Furthermore, we found that if the lower end of the guide path extends towards the crop collection box, displacing the crop collection box upwards to retrieve it could cause the heavy crop collection box to come into contact with the lower end of the guide path from below. Since a high frequency of contact between the crop collection box and the lower end of the guide path could lead to problems such as deformation of the guide path, we considered ways to reduce the frequency of contact between the rising crop collection box and the lower end of the guide path.

[0012] To address the problem, one aspect of the present invention is a cutting piece discharge device installed in a rolling mill, which has a guide path that guides the cutting pieces of a metal plate cut by a cutting machine downward and collects the cutting pieces in a cutting piece collection box having an open top, wherein, in a top view, the lower end of the guide path is positioned to overlap with the cutting piece collection box, and further, a contact prevention body is provided between the lower end of the guide path and the cutting piece collection box, which contacts the cutting piece collection box before the cutting piece collection box comes into contact with the lower end of the guide path when the cutting piece collection box is displaced upward. [Effects of the Invention]

[0013] According to an aspect of the present invention, by extending the lower end of the guide path toward the piece collection box, it becomes possible to more reliably collect the piece in the piece collection box.

[0014] Furthermore, according to an aspect of the present invention, when the piece collection box is displaced upward, the frequency with which the piece collection box comes into contact with the lower end of the guide path can be suppressed. As a result, while ensuring more reliable storage of the piece, damage to the lower end of the guide path by the piece collection box can be suppressed. [Brief explanation of the drawing]

[0015] [Figure 1] This diagram schematically illustrates the collection state of the cut fragment collection box. [Figure 2]It is a side view showing the relationship between the lower end of a crop chute, a crop scrap collection box, and a contact prevention body. [Figure 3] It is a top view of the crop chute and the crop scrap collection box. [Figure 4] It is an enlarged side view showing the relationship between the lower end of the crop chute, the crop scrap collection box, and the contact prevention body. [Figure 5] It is a front view illustrating the contact prevention body. [Figure 6] It is a side view of the contact prevention body. [Figure 7] It is a front view illustrating the attachment of a horizontal member to a support plate. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a hot rough rolling facility is assumed as the rolling facility. Further, a case where the cutting machine is a crop shear is exemplified. That is, a case where the cut piece is a crop scrap is exemplified.

[0017] However, the facility to which the present invention is applied is not limited to hot rough rolling facilities. The present invention is also applicable to other rolling facilities provided with a cutting machine such as a skin pass line. Further, the cutting machine may be a cutting machine other than a crop shear.

[0018] (Configuration) As shown in Fig. 2, the crop discharging device of the present embodiment includes a crop chute 2. The crop chute 2 is arranged so as to extend obliquely downward from below the crop shear 12. In each drawing, various members and facilities for controlling the behavior of the crop scrap 1 and the like are arranged around the crop chute 2, but are omitted for clarity. The crop discharging device of the present embodiment includes at least the crop chute 2 and the contact prevention body 6.

[0019] <Crop Chute 2> Crop Shot 2 forms the guide path. As shown in Figure 2, the crop chute 2 is positioned below the crop shear 12 on its upstream side, allowing it to receive the cut and falling crop pieces 1 at its bottom surface 2a.

[0020] The crop chute 2 is, for example, an inclined road that extends in a direction perpendicular to the rolling direction (lateral direction) in a plan view, as shown in Figures 2 and 3, for rolling the metal sheet. Note that the direction of extension of the crop chute 2 does not need to be perpendicular to the rolling direction. It is sufficient that the crop piece 1 is guided to a position outside the rolling line.

[0021] As shown in Figure 1, the lower end 2A of the crop chute 2 extends beyond the vertically extending installation surface 10 towards the crop piece collection box. The amount of overhang is, for example, 200 mm. As a result, in a plan view, the tip surface of the lower end 2A of the crop chute 2 overlaps with the upper opening of the crop piece collection box. Note that in Figure 1, the contact prevention body 6 is omitted, and the lifting device 5 of the crane 4 for lifting the crop piece collection box 3 is shown.

[0022] Now, let's explain the crop shard collection box 3. The crop fragment collection box 3 is a box-shaped structure with an open top surface 3A. Note that Figure 1 illustrates a case where the wall of the crop fragment collection box 3 is cut diagonally at the corner of the upper end on the crop chute 2 side.

[0023] The crop piece collection box 3 is placed on the floor surface 11, which is the box mounting area, with the box positioned towards the crop chute 2 so as to be in contact with the mounting surface 10. Although there are types of boxes 3 that have wheels on the bottom, the crop piece collection box 3 in this embodiment does not have wheels.

[0024] In this embodiment, the lower end 2A of the crop chute 2 is extended toward the crop piece collection box 3. As a result, the crop pieces 1 that fall through the crop chute 2 are more reliably dropped into the crop piece collection box 3 and collected within the crop piece collection box 3.

[0025] In this embodiment, when retrieving the heavy crop collection box 3, which contains the crop pieces 1, in order to replace the crop piece collection box 3, we consider the case where the crop piece collection box 3 is lifted and transported to another location, as shown in Figure 1.

[0026] In this transport method, the crop piece collection box 3 is swung to the right in Figure 1 and lifted, and the crane is operated to prevent the crop piece collection box 3 from contacting the lower end 2A of the crop chute 2. However, due to interference from various equipment, the area around the lower end 2A of the crop chute 2 is difficult to see, and the raised crop piece collection box 3 frequently comes into contact with the lower end 2A of the crop chute 2. In particular, contact from below, pushing upwards, has a significant adverse effect on the lower end 2A of the crop chute 2.

[0027] In this embodiment, a contact prevention body 6 is provided to prevent interference between the crop chute 2 and the crop piece collection box 3.

[0028] <Contact prevention body 6> The contact prevention body 6 will be explained with reference to Figures 2 to 7. As shown in Figure 2, the contact prevention body 6 is positioned between the lower end 2A of the crop chute 2 and the crop piece collection box 3. The contact prevention body 6 is positioned so as to contact the crop piece collection box 3 before it comes into contact with the lower end 2A of the crop shear 12 when the crop piece collection box 3 is displaced upward.

[0029] Furthermore, since the contact prevention body 6 in this embodiment is not supported by the crop chute 2, the impact applied to the contact prevention body 6 is not directly transmitted to the crop chute 2.

[0030] As shown in Figures 3 to 5, the contact prevention body 6 of this embodiment comprises a horizontal member 8 and a plurality of brackets 9. The contact prevention body 6 of the present invention is made of a metal material such as iron or steel. The contact prevention body 6 may be made of a material other than metal, such as wood, as long as sufficient strength is ensured so that it is not easily damaged even when the crop piece collection box 3 comes into contact with it.

[0031] <Horizontal support member 8> The horizontal member 8 is positioned below the lower end 2A of the crop chute 2 and, in a top view, extends in the width direction of the crop chute 2. The horizontal member 8 in this embodiment is a flat plate shaped with its thickness direction oriented in the front-to-back direction. Both the left and right ends of the horizontal member 8 are detachably attached to the structure 30 of the equipment via support plates 7. The portion of the structure 30 to which the support plates 7 are fixed may be a component of an existing equipment or a component of a newly installed equipment.

[0032] In a plan view, both the left and right ends of the horizontal member 8 are located wider than the lower end 2A of the crop chute 2, and both the left and right ends of the horizontal member 8 are fixed to the column section 30 (equipment frame 30) located wider than the lower end 2A of the crop chute 2.

[0033] Specifically, a support plate 7 is fixed to the surface of the column 30 facing the crop piece collection box 3, and the end of the horizontal member 8 is detachably attached to the support plate 7 by bolt fastening. Reference numeral 13 denotes the fastening bolt.

[0034] Furthermore, the support plate 7 is provided with a hook portion 7A that protrudes toward the cut piece collection box side. In addition, a recess 8A is formed at the lower part of the end of the horizontal member 8, which can be hooked onto the hook portion 7A from above. That is, by hooking the left and right ends of the horizontal member 8 onto the hook portion 7A from above, the horizontal member 8 can be mounted horizontally on the left and right support plates 7, and in this state, it becomes possible to stably fasten the bolts.

[0035] Furthermore, in this embodiment, the support plate 7 has protrusions 7B that can abut against the longitudinal end of the horizontal member 8, and by sliding the extending end of the horizontal member 8 against the protrusions 7B, the positioning of the horizontal member 8 in the extending direction can be easily performed.

[0036] <Bracket 9> The bracket 9 constitutes the main body of the contact prevention unit 6. Multiple brackets 9 are arranged in the direction of extension of the horizontal member 8, and each bracket 9 is integrally fixed to the horizontal member 8. Three or more brackets 9 are preferable. Each bracket 9 protrudes from the horizontal member 8 towards the crop collection box 3. That is, the rear end of each bracket 9 is fixed to the horizontal member 8 and extends outwards towards the crop collection box 3 in a cantilevered manner.

[0037] The shape of the protruding tip surface 9A of the bracket 9 is set such that, in a side view, the amount of protrusion gradually increases continuously or intermittently from the bottom to the top. Furthermore, the end position of the bracket 9 at its maximum protrusion is, in a top view, equal to the tip position of the lower end 2A of the guide path, or protrudes further toward the crop piece collection box 3 than the tip position of the lower end 2A of the guide path.

[0038] (Operation and other functions) In the rolling mill, the leading and trailing ends of the metal sheet in the rolling direction are cut by the crop shear 12 to shape the rolled metal sheet. The cut pieces, called crop pieces 1, fall via the crop shear 12 and land on the upstream side of the crop chute 2, as shown in Figures 2 and 3. Once on the crop chute 2, the crop pieces 1 are guided by the crop chute 2 and fall diagonally downward, eventually landing in the crop piece collection box 3 from the lower end 2A of the crop chute 2. This process is repeated, and the crop pieces 1 are sequentially collected in the crop piece collection box 3.

[0039] At this time, by extending the lower end 2A of the crop chute 2 toward the crop piece collection box 3 side beyond the installation surface 10, it becomes possible to more reliably drop each crop piece into the crop piece collection box 3.

[0040] <Retrieving Crop Fragment Collection Box 3> For example, if it is determined that the amount of crop pieces 1 stored in the crop piece collection box 3 exceeds a specified amount, the box 3 is replaced.

[0041] In this embodiment, the replacement operation involves lifting the crop collection box 3, which has become heavy with the stored crop pieces 1, using a crane 4, as shown in Figure 1, and transporting the crop collection box 3 to another location (not shown). In this case, as shown in Figure 1, a lifting device 5 consisting of wires or chains is lowered from the overhead crane 4, and the hook portion 7A of the lifting device 5 is hooked onto the crop piece collection box 3. Next, use crane 4 to raise crop shard collection box 3.

[0042] In this embodiment, as shown in Figure 1 and other figures, the lower end portion 2A of the crop chute 2 is set to protrude towards the crop piece collection box 3 side beyond the vertically extending installation surface 10, so that, in a top view, as shown in Figure 1, the tip of the lower end portion 2A of the crop chute 2 is positioned inside the upper opening of the crop piece collection box 3.

[0043] Therefore, if the contact prevention body 6 is not present, simply raising the crop piece collection box 3 with the crane 4 will cause the right end of the crop piece collection box 3 in Figure 1 to come into contact with the lower end 2A of the crop chute 2 from below. When this contact occurs, a predetermined impact from the crop piece collection box 3 to be collected will be input to the lower end 2A of the crop chute 2.

[0044] Therefore, the worker raises the crop piece collection box 3 so that it swings to the right in Figure 1. Even in this manner, the rising crop piece collection box 3 is likely to come into contact with the lower end 2A of the crop chute 2. If this contact occurs frequently, it may cause damage to the crop chute 2, potentially hindering the collection of crop pieces 1.

[0045] In contrast, in this embodiment, a contact prevention body 6 is provided below the lower end portion 2A of the crop chute 2. Therefore, when the crop piece collection box 3 is raised from the crop piece collection position, the upper end of the crop piece collection box 3 comes into contact with the tip surface 9A of the bracket 9 of the contact prevention body 6 before it comes into contact with the lower end 2A of the crop chute 2, thereby preventing the upper end of the crop piece collection box 3 from coming into contact with the lower end 2A of the crop chute 2.

[0046] Furthermore, in this embodiment, the contact prevention body 6 has a shape in which the amount of protrusion gradually increases continuously or intermittently from the bottom to the top, specifically, the profile along the vertical direction of the end face of the tip of the bracket 9 in the portion that contacts the crop piece collection box 3. Therefore, after the upper end of the rising crop piece collection box 3 contacts the contact prevention body 6, as it rises, the crop piece collection box 3 is guided in a direction away from the lower end 2A of the crop chute 2 when viewed from above (to the right in Figures 1 and 2). As a result, the crop piece collection box 3 moves upward while swinging away from the lower end 2A of the crop chute 2. In other words, the upper end of the crop piece collection box 3 can rise without getting caught on the contact prevention body 6. In addition, as the crop piece collection box 3 rises while being displaced to the right by the contact prevention body 6, it is possible to further prevent the crop piece collection box 3 from contacting the lower end 2A of the crop chute 2.

[0047] Furthermore, by fixing the contact prevention body 6 to the structure of the equipment rather than supporting it on the crop chute 2, it is possible to avoid transmitting the impact applied to the contact prevention body 6 to the crop chute 2. The equipment may be, for example, a crop discharge device or a rolling mill. In this embodiment, the surface position for fixing the contact prevention body 6 is set to the installation surface 10 position.

[0048] Furthermore, in this embodiment, since the horizontal member 8 is fixed to the structure via the support plate 7 with bolts, if the bracket 9 or the like is damaged, the horizontal member 8 can be removed and another horizontal member 8 can be installed. In other words, by making the contact prevention body 6 easily detachable with bolts 13, the maintainability of the contact prevention body 6 is improved.

[0049] Furthermore, when bolting the end of the horizontal member 8, the horizontal member 8 can be temporarily supported simply by first hooking the recess 8A onto the hook portion 7A. Therefore, even if the horizontal member 8 is heavy, the bolting work at the end of the horizontal member 8 becomes easier.

[0050] Here, the position of the most protruding tip of the bracket 9 is set so that, in a plan view, it is at the same position as the tip surface of the lower end 2A of the crop chute 2, or protrudes further toward the crop piece collection box 3 than the tip surface. The amount of protrusion is such that the crop pieces 1 falling from the crop chute 2 toward the crop piece collection box 3 do not come into contact with it, or come into contact with it only slightly.

[0051] (others) This disclosure may also take the following form: (1) Disclosure 1 is a cutting piece discharge device installed in a rolling mill, which has a guide path that guides the cutting pieces of a metal plate cut by a cutting machine downward and collects the cutting pieces in a cutting piece collection box that has an open top, In a top view, the lower end of the guide path is positioned to overlap with the cut piece collection box. Furthermore, it is provided with a contact prevention body positioned between the lower end of the guide path and the cut piece collection box, which contacts the cut piece collection box before it comes into contact with the lower end of the guide path when the cut piece collection box is displaced upward. Cut piece ejector. (2) Disclosure 2 states that the contact prevention body is Below the above guideway, a horizontal member extending in the width direction of the guideway, Multiple brackets are arranged in the direction extending along the horizontal member and each is fixed to the horizontal member, Equipped with, Each of the brackets described above protrudes from the horizontal member toward the piece collection box and is capable of contacting the piece collection box which is displaced upward. (3) Disclosure 3 shows that the shape of the tip surface of the bracket is such that the amount of protrusion toward the cut piece collection box side increases continuously or intermittently from the bottom to the top. (4) Disclosure 4 states that the ends of the horizontal members are detachably attached to the frame of the equipment. (5) Disclosure 5 has a support plate that is fixed to the frame of the equipment, The ends of the above horizontal members are detachably fixed to the above support plate by bolt fastening. Furthermore, A hook portion is provided on the support plate that protrudes toward the cut piece collection box, and a recess is formed at the lower end of the end of the horizontal member, which can be hooked onto the hook portion from above. (6) Disclosure 6 shows that the maximum protruding position on the tip surface of the bracket is, in a top view, equal to the tip position of the lower end of the guide path, or protrudes further toward the cut piece collection box than the tip position of the lower end of the guide path. (7) Disclosure 7 states that the above-mentioned cut piece is a crop piece. (8) Disclosure 8 is a cutting piece discharge device of this disclosure which sequentially collects the cut pieces into the cutting piece collection box, The above-mentioned collection box containing the collected pieces is moved by lifting the box with a crane and transporting it to another location. Method for recovering the cut pieces. [Explanation of Symbols]

[0052] 1. Crop piece (cut piece) 2. Crop Shot (Guidance Path) 2A Lower end 3. Crop fragment collection box (cut fragment collection box) 4 Cranes 5. Lifting device 6 Contact prevention body 7 Support plate 7A Hook section 8 Horizontal members 8A recess 9 brackets 9A Tip surface 10 Installation surface 11 Floor surface 12. Cropping Shear (Cutting Machine) 30 Column (framework)

Claims

1. A cutting piece discharge device installed in a rolling mill, having a guide path that guides the cutting pieces of a metal plate cut by a cutting machine downwards and collects the cutting pieces in a cutting piece collection box with an open top, In a top view, the lower end of the guide path is positioned to overlap with the cut piece collection box. Furthermore, it is provided with a contact prevention body positioned between the lower end of the guide path and the cut piece collection box, which contacts the cut piece collection box before it comes into contact with the lower end of the guide path when the cut piece collection box is displaced upward. Cut piece ejector.

2. The above contact prevention body is Below the above guideway, a horizontal member extending in the width direction of the guideway, Multiple brackets are arranged in the direction extending along the horizontal member and each is fixed to the horizontal member, Equipped with, Each of the above brackets protrudes from the horizontal member toward the piece collection box and is capable of contacting the piece collection box which is displaced upward. A cutting piece discharge device as described in claim 1.

3. The shape of the protruding end surface of the bracket described above is such that the amount of protrusion toward the cut piece collection box increases continuously or intermittently from the bottom to the top. A cutting piece discharge device as described in claim 2.

4. The ends of the above horizontal members are detachably attached to the structure of the equipment. A cutting piece discharge device as described in claim 2.

5. It has a support plate that is fixed to the structure of the equipment, The ends of the above horizontal members are detachably fixed to the above support plate by bolt fastening. Furthermore, The support plate is provided with a hook portion that protrudes toward the cut piece collection box, and a recess is formed at the lower end of the end of the horizontal member, which can be hooked onto the hook portion from above. A cutting piece discharge device as described in claim 4.

6. The maximum protruding position on the protruding end face of the bracket is, in a top view, equal to the tip position of the lower end of the guide path, or protrudes further toward the cut piece collection box than the tip position of the lower end of the guide path. A cutting piece discharge device as described in claim 2.

7. The above-mentioned cut piece is a crop piece. A cutting piece discharge device according to any one of claims 1 to 6.

8. The cut piece discharge device according to any one of claims 1 to 6, wherein the cut pieces are sequentially collected into the cut piece collection box, The removal of the above-mentioned cut pieces from the collection box is done by lifting the box with a crane and transporting it to another location. Method for recovering the cut pieces.

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