Foreign matter capturing device

Abstract

To provide a foreign matter capturing device capable of capturing linear foreign matter with a simple structure.SOLUTION: The foreign matter capturing device 1 is a device for capturing foreign matter contained in a recycled material. A foreign matter capturing device 1 includes a cylindrical case 10 in which a path through which a recycled material passes is formed, a mesh-like laser filter 20 provided at one end of the case 10 and disposed perpendicular to an axis L direction of the case 10, and a protruding piece 30 disposed inclined with respect to the axis L direction of the case 10 on an upstream side of the laser filter 20, a fixed end 31 of the protruding piece 30 being fixed to an inner wall surface 11 of the case 10 and a free end 32 of the protruding piece 30 protruding into the case 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a foreign object capturing device. [Background technology]

[0002] In the related art, for example, a foreign matter capture device equipped with a laser filter that captures foreign matter contained in recycled materials is known. The laser filter has a fine mesh that allows the recycled material to pass through while preventing the passage of foreign matter contained in the recycled material. However, when linear foreign matter such as wires is perpendicular to the mesh of the laser filter, it passes through the mesh and remains in the product.

[0003] In order to solve the above-mentioned problems, the application of a method is being considered in which a curved section is provided inside the filter to redirect linear foreign particles perpendicular to the laser filter mesh and thereby capture them, as described in Patent Document 1 below, for example. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-140711 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when a bent portion is provided inside the filter, the laser filter must be significantly modified, which creates a new problem of making the foreign matter capturing device more complicated.

[0006] The present invention has been made to solve the above technical problems, and has an object to provide a foreign object capturing device that has a simple structure and is capable of capturing linear foreign objects. [Means for solving the problem]

[0007] The foreign matter capture device of the present invention is a foreign matter capture device that captures foreign matter contained in recycled materials, and is characterized by comprising: a cylindrical case having a path formed inside through which the recycled materials pass; a mesh-like laser filter provided at one end of the case and arranged perpendicular to the axial direction of the case; and a protruding piece arranged upstream of the laser filter at an angle with respect to the axial direction of the case, with one end fixed to the inner wall surface of the case and the other end protruding into the interior of the case.

[0008] The foreign object capturing device according to the present invention includes a protruding piece disposed upstream of the laser filter at an angle relative to the axial direction of the case, with one end fixed to the inner wall surface of the case and the other end protruding into the case. The protruding piece is used to collide with linear foreign objects, such as wires, passing perpendicular to the mesh of the laser filter, thereby changing the direction of the linear foreign objects. This causes the linear foreign objects to no longer be perpendicular to the filter mesh, allowing them to be captured by the laser filter. Furthermore, the structure is relatively simple, since it is sufficient to add only the protruding piece to the existing case, rather than requiring modification of the laser filter as in the past. As a result, linear foreign objects can be captured with a simple structure.

[0009] In the foreign object capture device according to the present invention, it is preferable that the protruding pieces are multiple and arranged at predetermined intervals along the axial direction of the case. Even if a linear foreign object is changed direction due to a collision with a protruding piece, the linear foreign object may again become perpendicular to the laser filter mesh due to the influence of the recycled material flowing through the path. By arranging multiple protruding pieces at predetermined intervals along the axial direction of the case, the linear foreign object is forced to change direction multiple times, preventing this possibility and ensuring reliable capture of the linear foreign object.

[0010] In the foreign object capture device according to the present invention, it is preferable that the protruding piece has a width and a thickness that decrease from the one end to the other end, thereby increasing the area where the protruding piece is fixed to the inner wall surface of the case, thereby improving the strength of the protruding piece. [Effects of the Invention]

[0011] According to the present invention, linear foreign matter can be captured with a simple structure. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic cross-sectional view showing a foreign object capturing device according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] 1A is a schematic diagram for explaining the problems of a conventional foreign matter capturing device, and FIG. 1B is a schematic cross-sectional view for explaining the effects of the foreign matter capturing device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a foreign object capturing device according to the present invention will be described below with reference to the drawings. In the description of the drawings, the same elements are given the same reference numerals and redundant description will be omitted.

[0014] The foreign matter capture device 1 according to this embodiment is a device used to sort recycled materials, capturing and removing foreign matter contained in the recycled materials. The recycled materials in this case refer to, for example, shredder dust such as resin, urethane, and plastic left over after shredding end-of-life automobiles. When such recycled materials pass through the interior of the foreign matter capture device 1 in a molten state, for example, metals contained therein are removed by a laser filter attached to the foreign matter capture device 1. This reduces the amount of foreign matter in the recycled materials, resulting in recycled materials with high physical properties.

[0015] Fig. 1 is a schematic cross-sectional view showing a foreign matter capturing device according to an embodiment, and Fig. 2 is a cross-sectional view taken along line AA in Fig. 1. As shown in Figs. 1 and 2, foreign matter capturing device 1 according to this embodiment includes a cylindrical case 10, a laser filter 20 provided at one end of case 10, and a plurality of elongated protruding pieces 30 provided on an inner wall surface 11 of case 10.

[0016] The case 10 is made of a metal material such as aluminum or stainless steel, and has a path formed inside it through which the recycled materials pass. In this path, the recycled materials pass from left to right as indicated by the arrow.

[0017] The laser filter 20 is a mesh body in which a plurality of circular holes 21 are aligned, and is fixed to the downstream end (the right end in FIG. 1) of the case 10 so as to be perpendicular to the axis (central axis) L direction of the case 10. In other words, the laser filter 20 is disposed at the downstream end of the case 10 so that the central axes of the circular holes 21 are parallel to the axis L direction of the case 10.

[0018] The protruding piece 30 is disposed on the upstream side of the laser filter 20 and inclined with respect to the axial L direction of the case 10. More specifically, the protruding piece 30 is formed in a cantilever shape such that one end (fixed end 31) is fixed to the inner wall surface 11 of the case 10 and the other end (free end 32) protrudes into the inside of the case 10 (i.e., into the path).

[0019] As shown in FIG. 1 , the multiple protruding pieces 30 are arranged at equal intervals along the axial L direction of the case 10. These protruding pieces 30 are divided into upper protruding pieces 30 that are fixed to the upper inner wall surface and protrude downward, and lower protruding pieces 30 that are fixed to the lower inner wall surface and protrude upward, and are aligned in two rows, one above the other. The upper protruding pieces 30 and the lower protruding pieces 30 are arranged in a staggered pattern in the axial L direction of the case 10. The free ends 32 of the upper protruding pieces 30 and the free ends 32 of the lower protruding pieces 30 each extend to a position overlapping the axial L of the case 10.

[0020] As shown in Fig. 2, when viewed from the axial L direction of the case 10, the protruding piece 30 has a crescent-shaped cross section. The protruding piece 30 narrows in width and thickness from the fixed end 31 to the free end 32. That is, the protruding piece 30 becomes smaller in both width and thickness toward the free end 32. The upper protruding piece 30 and the lower protruding piece 30 are arranged with the recesses of the crescents facing each other.

[0021] The projecting piece 30 having such a structure is made of the same material (for example, aluminum) as the case 10, and is fixed to the inner wall surface of the case 10 by welding, adhesive, or the like.

[0022] The effects of the foreign object capturing device 1 according to this embodiment will be described below with reference to FIGS. 3(a) and 3(b).

[0023] In the conventional foreign matter capturing device 1A shown in Fig. 3(a), the size of the mesh opening of the laser filter 20 (in other words, the diameter of the circular holes 21) is made smaller than the longitudinal dimension of the linear foreign matter 40, thereby capturing the linear foreign matter 40 with the laser filter 20. However, when the linear foreign matter 40 is perpendicular to the mesh of the laser filter 20, the linear foreign matter 40 passes through the mesh without being captured, causing a problem that the linear foreign matter 40 remains in the product.

[0024] 3(a), when a linear foreign object 40 passes through the circular hole 21 of the laser filter 20 with its longitudinal direction parallel to the axial direction L of the case 10, it passes through the circular hole 21 and remains in the recycled material. This not only reduces the physical properties of the recycled material, but also causes the problem of damaging the molding machine (not shown) that molds the recycled material.

[0025] On the other hand, the foreign object capturing device 1 of this embodiment includes a plurality of protruding pieces 30 disposed upstream of the laser filter 20 at an angle relative to the axial direction L of the case 10. The protruding pieces 30 have fixed ends 31 fixed to the inner wall surface of the case 10 and free ends 32 protruding into the interior of the case 10. As shown in FIG. 3(b), these protruding pieces 30 are used to collide with linear foreign objects 40 passing perpendicular to the mesh of the laser filter 20. This causes the linear foreign objects 40 to change direction, so that they are no longer perpendicular to the mesh of the laser filter 20 and are captured by the laser filter 20. Furthermore, unlike conventional devices, there is no need to modify the laser filter; instead, it is sufficient to add only the protruding pieces 30 to the existing case, resulting in a relatively simple structure. As a result, linear foreign objects 40 can be captured with a simple structure.

[0026] In addition, the multiple protruding pieces 30 are arranged at predetermined intervals along the axial L direction of the case 10. Even if the linear foreign object 40 changes direction due to a collision with the protruding pieces 30, there is a possibility that the linear foreign object 40 will again become perpendicular to the mesh of the laser filter 20 due to the influence of the recycled material flowing through the path. By arranging the multiple protruding pieces 30 at predetermined intervals along the axial L direction of the case 10, the linear foreign object 40 will change direction multiple times, preventing the above-mentioned possibility and enabling the linear foreign object 40 to be reliably captured.

[0027] Furthermore, the protruding piece 30 narrows in width and thickness from the fixed end 31 to the free end 32. In this way, the fixed portion between the protruding piece 30 and the inner wall surface 11 of the case 10 is increased, thereby improving the strength of the protruding piece 30 and preventing the protruding piece 30 from breaking or bending due to a collision with the linear foreign object 40.

[0028] In the above embodiment, the multiple protruding pieces 30 are described as being arranged in two rows, one above the other, but they may be arranged in two rows, one above the other, or in four rows, one above the other. When the protruding pieces 30 are arranged in four rows, one above the other, or in two rows, the probability of collision with a passing foreign object can be further increased compared to when the protruding pieces 30 are arranged in two rows, one above the other, or in two rows, one above the other, and therefore the linear foreign object 40 can be captured more reliably.

[0029] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various design modifications can be made without departing from the spirit of the present invention as set forth in the claims. [Explanation of symbols]

[0030] 1: foreign object capturing device, 10: case, 11: inner wall surface, 20: laser filter, 21: circular hole, 30: protruding piece, 31: fixed end, 32: free end, 40: linear foreign object

Claims

1. A foreign matter capture device that captures foreign matter contained in recycled materials, a cylindrical case having a passage formed therein through which the recycled material passes; a mesh-shaped laser filter provided at one end of the case and arranged perpendicular to the axial direction of the case; a protruding piece disposed on the upstream side of the laser filter at an angle with respect to the axial direction of the case, one end of which is fixed to the inner wall surface of the case and the other end of which protrudes into the case; A foreign object capturing device comprising:

2. 2. The foreign object capturing device according to claim 1, wherein the projecting pieces are a plurality of pieces arranged at predetermined intervals along the axial direction of the case.

3. 3. The foreign object capturing device according to claim 1, wherein the protruding piece is tapered in width and thickness from the one end to the other end.

Images