Transport path and metal foreign object detection device

Abstract

To provide a transport path and a metal foreign object detection device that are highly durable and capable of accurately detecting metal foreign objects contained in granular materials being passed therethrough.SOLUTION: A transport path 10, through which a granular material G is passed, has a metal detection sensor 11 arranged on the outer circumference for detecting a metal foreign object mixed in the granular material G. The transport path includes a non-metallic cylindrical body 20 and an inner surface plate 40 provided on the inner circumferential surface of the cylindrical body 20 and having abrasion-resistant layers 51, 61 made of a non-metallic material that is harder than the cylindrical body 20. The inner surface plate 40 is detachable from the inner circumferential surface of the cylindrical body 20.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a conveying path and a metallic foreign matter detecting device. [Background technology]

[0002] Patent Document 1 discloses a weighing device in which a metal detector such as a metal detection sensor is provided facing the conveying surface of an individual chute provided in a memory hopper. In this weighing device, the individual chute is made of a non-metallic material such as resin, and the metal detector detects metal objects contained in the objects to be weighed that slide down the individual chute. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-296099 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the weighing device described in Patent Document 1, the conveying surface of the individual chute, which is made of a non-metallic material such as resin, is easily worn, particularly when the objects to be weighed are hard, and the individual chute must be replaced frequently. This increases the cost of maintenance. In addition, there is a risk that the detection accuracy of metal objects will decrease due to the effect of static electricity generated when the objects to be weighed slide down the individual chute.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a conveying path and a metal foreign matter detection device that are highly durable and capable of detecting metal foreign matters contained in granular matter passing through with high accuracy. [Means for solving the problem]

[0006] The above object of the present invention can be achieved by the following configuration. (1) A conveying path through which granular material passes and has a metal detection sensor disposed on the outer periphery thereof for detecting metallic foreign matter present in the granular material, A non-metallic cylindrical body; an inner surface plate provided on an inner peripheral surface of the cylindrical body and having a wear-resistant layer made of a non-metallic material harder than the cylindrical body; having The inner surface plate is detachable from the inner peripheral surface of the cylindrical body.

[0007] According to the conveying path having the above-mentioned configuration (1), the inner peripheral surface of the cylindrical body is covered by an inner surface plate having an abrasion-resistant layer, so that durability is improved and the life span is extended. In addition, the generation of static electricity due to contact between the cylindrical body and the granular matter is suppressed. In other words, the static electricity that hinders the detection of metallic foreign objects is suppressed, and the detection accuracy of metallic foreign objects by the metal detection sensor is improved. Moreover, since the inner plate is detachable, even if the inner plate wears out, it is possible to replace only the inner plate without replacing the cylindrical body, thereby reducing maintenance costs. Also, the inner plate can be easily replaced depending on the type of granular matter to be inspected, and the inner plate can be easily removed for cleaning.

[0008] (2) The transport path according to (1), wherein the wear-resistant layer is made of ceramic.

[0009] According to the transport path having the above configuration (1), the inner plate having a wear-resistant layer made of ceramic suppresses static electricity, improves the detection accuracy of metallic foreign matter, and improves durability and life span.

[0010] (3) The inner surface plate is composed of a bottom surface plate portion attached to a bottom portion of the cylindrical body and a side surface plate portion attached to a side portion of the cylindrical body, The conveying path described in (1), wherein the bottom plate portion and the side plate portion are each detachable from the cylindrical body.

[0011] According to the transport path having the above configuration (3), the bottom plate portion and the side plate portion can be replaced separately, so that the cost of replacement can be reduced.

[0012] (4) The transport path described in (1), wherein the inner plate has a wear-resistant layer formed by attaching a plurality of tiles made of a non-metallic material harder than the cylindrical body onto a substrate.

[0013] According to the transport path having the above configuration (4), worn tiles can be partially replaced, so that the cost of replacement can be reduced.

[0014] (5) The cylindrical body has a main body having an opening at an upper portion, and a lid attached to an upper portion of the main body to close the opening, The transport path described in (1), wherein the cover is detachable from the main body.

[0015] According to the conveying path having the above configuration (5), by removing the cover, the state of wear and dirt on the inner surface plate provided on the inner circumferential surface of the cylindrical body can be easily visually checked.

[0016] (6) A conveying path according to any one of (1) to (5), which is installed in an inclined state and the granular material passes through the inside by its own weight; A metal detection sensor provided on an outer periphery of the transport path; A metal foreign body detection device comprising:

[0017] The metal foreign matter detector having the above configuration (6) has a conveying path in which the inner peripheral surface of the cylindrical body is covered with an inner plate having an abrasion-resistant layer that is harder and more durable than the cylindrical body, thereby extending the life of the device. In addition, since the inner plate of the conveying path is detachable from the cylindrical body, the device can be used for a long period of time by replacing the worn inner plate. Effect of the Invention

[0018] According to the present invention, it is possible to provide a conveying path and a metallic foreign matter detector that are excellent in durability and are capable of detecting metallic foreign matters contained in granular matter passed through with high accuracy.

[0019] The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the following description of the embodiment of the present invention (hereinafter, referred to as "embodiment") with reference to the accompanying drawings. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic side view of a transport facility equipped with a metallic foreign matter detector. [Diagram 2] FIG. 2 is a side view of the metallic foreign matter detector including the transport path according to this embodiment. [Diagram 3] FIG. 3 is a perspective view of the transport path. [Figure 4] FIG. 4 is a perspective view of the transport path with the cover removed. [Diagram 5] FIG. 5 is an exploded perspective view showing the mounting structure of the bottom plate portion to the cylindrical body. [Figure 6] FIG. 6 is an exploded perspective view showing the mounting structure of the side plate portion to the cylindrical body. [Figure 7] FIG. 7 is a plan view of the bottom plate portion that constitutes the inner plate. [Figure 8] FIG. 8 is a plan view of the side plate portion that constitutes the inner plate. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a schematic side view of a transport facility 1 equipped with a metallic foreign matter detector 12. Fig. 2 is a side view of the metallic foreign matter detector 12 equipped with a transport path 10 according to this embodiment.

[0022] As shown in Fig. 1, a conveying path 10 according to this embodiment is used in a conveying equipment 1. The conveying equipment 1 is equipment for detecting metallic foreign matter present in granular material G such as fertilizer or feed. Note that the granular material G inspected by the conveying equipment 1 is not limited to fertilizer or feed, and may be, for example, various granular foods such as beans.

[0023] The conveying equipment 1 has a hopper 2 into which granular material G is fed, and a conveying passage 4 connected to a discharge path 3 of the hopper 2. The conveying passage 4 is installed in an inclined state by a stand 5. In this conveying equipment 1, the granular material G fed into the hopper 2 is sent from the discharge path 3 to the conveying passage 4 by its own weight, passes through the conveying passage 4 while sliding down, and is discharged from a discharge port 4a at the end of the conveying passage 4.

[0024] The transport path 10 according to this embodiment constitutes a part of the transport passage 4 of the transport equipment 1. A metal detection sensor 11 is disposed on the outer periphery of the transport path 10. The transport path 10, together with the metal detection sensor 11, constitutes a metallic foreign matter detector 12.

[0025] As shown in Fig. 2, the transport path 10 and the metal detection sensor 11 are supported by a stand 5. The transport path 10 is fixed to the stand 5 near both ends by stays 6. The metal detection sensor 11 is fixed to the stand 5 at a midpoint in the longitudinal direction of the transport path 10. The metal detection sensor 11 is made of a ring-shaped coil, and the transport path 10 is inserted through its center. As a result, the transport path 10 is surrounded by the metal detection sensor 11.

[0026] Fig. 3 is a perspective view of the transport path 10. Fig. 4 is a perspective view of the transport path 10 with the lid 22 removed. Fig. 5 is an exploded perspective view showing the mounting structure of the bottom plate portion 41 to the cylindrical body 20. Fig. 6 is an exploded perspective view showing the mounting structure of the side plate portion 42 to the cylindrical body 20. Fig. 7 is a plan view of the bottom plate portion 41 constituting the inner plate 40. Fig. 8 is a plan view of the side plate portion 42 constituting the inner plate 40.

[0027] As shown in Figs. 3 and 4, the conveying path 10 is formed in a square tube shape, and the inside of the conveying path 10 is a passage through which the granular material G passes. The conveying path 10 has a square tube-shaped body 20. The tube-shaped body 20 is composed of a main body 21 and a lid 22. The tube-shaped body 20 consisting of the main body 21 and the lid 22 is formed from a non-metallic material. The tube-shaped body 20 is preferably formed from a resin such as polyvinyl chloride (PVC). The tube-shaped body 20 may be formed from an engineering plastic such as polyacetal resin (POM), glass, or the like.

[0028] The main body 21 has a bottom wall 31 and a pair of side walls 32 facing each other, and the side walls 32 are erected from both side edges of the bottom wall 31. In addition, the main body 21 has connecting plate parts 33 provided across the upper edges of the pair of side walls 32 at both ends, and these connecting plate parts 33 connect the upper edges of the side walls 32 to each other. The main body 21 has an opening 35 surrounded by the side walls 32 and the connecting plate parts 33 at its upper part. The main body 21 has a plurality of holes 31a at positions near both ends of the bottom wall 31, and a plurality of holes 32a at positions near both ends of the side walls 32. The main body 21 also has fixing plate parts 36 on the bottom wall 31 near both ends. These fixing plate parts 36 are screwed to the stays 6 fixed to the frame 5. As a result, the transport path 10 is supported on the frame 5 in an inclined state via the stays 6 (see FIG. 2).

[0029] The lid 22 is formed in a rectangular flat plate shape, and is attached to the upper part of the main body 21 so as to close the opening 35 of the main body 21. The lid 22 is detachable from the main body 21.

[0030] The conveying path 10 has an inner surface plate 40. The inner surface plate 40 is composed of a bottom surface plate portion 41 and a side surface plate portion 42. The bottom surface plate portion 41 and the side surface plate portion 42 constituting the inner surface plate 40 are provided on the inner peripheral surface of the main body portion 21 of the cylindrical body 20, and are each detachable from the inner peripheral surface of the main body portion 21 of the cylindrical body 20.

[0031] As shown in FIG. 5, the bottom plate portion 41 constituting the inner plate 40 has an abrasion-resistant layer 51 made of a nonmetallic material harder than the cylindrical body 20. The bottom plate portion 41 also has a substrate 52. The substrate 52 is, for example, a sheet made of a resin material such as rubber. The substrate 52 has both end portions serving as mounting portions 53, and the abrasion-resistant layer 51 is attached to the surface of the substrate 52 excluding the mounting portions 53. The bottom plate portion 41 has a plurality of holes 53a formed at the positions of the mounting portions 53 of the substrate 52. These holes 53a are formed at positions corresponding to the holes 31a formed in the bottom wall portion 31 of the main body portion 21. As a result, when the bottom plate portion 41 is disposed on the inner side of the bottom wall portion 31 of the main body portion 21, the holes 53a of the bottom plate portion 41 communicate with the holes 31a of the bottom wall portion 31 of the main body portion 21.

[0032] The bottom plate 41 has mounting portions 53 at both ends attached to the bottom wall 31 of the main body 21 by brackets 55, 56. The brackets 55, 56 have male threaded portions 55a, 56a. One of the brackets 55 has a flange portion 55b for connection to the delivery path 3 of the hopper 2.

[0033] The brackets 55, 56 are assembled so as to be superimposed on the mounting portion 53 of the bottom plate portion 41 in a state in which the bottom plate portion 41 is disposed along the inner surface of the bottom wall portion 31 of the main body portion 21. The brackets 55, 56 assembled in this manner have their screw portions 55a, 56a inserted into the hole portion 53a of the bottom plate portion 41 and the hole portion 31a of the bottom wall portion 31 of the main body portion 21, which are connected to each other, and protrude to the outer surface side of the bottom wall portion 31. Then, by screwing the nut 57 into the screw portions 55a, 56a protruding to the outer surface side of the bottom wall portion 31, the mounting portion 53 of the bottom plate portion 41 is sandwiched between the brackets 55, 56 and the bottom wall portion 31. In this way, the bottom plate portion 41 is attached to the bottom wall portion 31. Furthermore, when the bottom plate portion 41 is attached to the bottom wall portion 31 of the main body portion 21 of the cylindrical body 20 by the brackets 55, 56, the flange portion 55b of one bracket 55 is disposed at one end of the cylindrical body 20 in a state where it protrudes outward.

[0034] As shown in FIG. 6, the side plate portion 42 constituting the inner plate 40 has an abrasion-resistant layer 61 made of a nonmetallic material harder than the cylindrical body 20. The side plate portion 42 also has a substrate 62. The substrate 62 is, for example, a sheet made of a resin material such as rubber. The substrate 62 has both end portions and an upper edge portion serving as mounting portions 63, and the abrasion-resistant layer 61 is attached to the surface of the substrate 62 excluding the mounting portions 63. The side plate portion 42 has a plurality of holes 63a formed at the positions of the mounting portions 63 of the substrate 62. These holes 63a are formed at positions corresponding to the holes 32a formed in the side wall portion 32 of the main body portion 21. As a result, when the side plate portion 42 is disposed on the inner side of the side wall portion 32 of the main body portion 21, the holes 63a of the side plate portion 42 are communicated with the holes 32a of the side wall portion 32 of the main body portion 21.

[0035] The side plate portion 42 has mounting portions 63 at both ends attached to the side wall portion 32 of the main body portion 21 by brackets 75, 76. The brackets 75, 76 have male threaded screw portions 75a, 76a. One of the brackets 75 has a flange portion 75b for connection to the delivery path 3 of the hopper 2.

[0036] The brackets 75, 76 are assembled so as to overlap the mounting portions 63 at both ends of the side plate portion 42 with the side plate portion 42 disposed along the inner surface of the side wall portion 32 of the main body portion 21. The brackets 75, 76 assembled in this manner have their screw portions 75a, 76a inserted into the hole portion 63a of the side plate portion 42 and the hole portion 32a of the side wall portion 32 of the main body portion 21, which are connected to each other, and protrude toward the outer surface side of the side wall portion 32. Then, the screw portions 75a, 76a protruding toward the outer surface side of the side wall portion 32 are screwed with nuts 77, whereby the mounting portions 63 of the side plate portion 42 are sandwiched between the brackets 75, 76 and the side wall portion 32. As a result, the side plate portion 42 is attached to the side wall portion 32. Furthermore, when the bottom plate 41 is attached to the side wall 32 of the main body 21 of the cylindrical body 20 by the brackets 75, 76, the flange 75b of one bracket 75 is disposed in a state of projecting outward at one end of the cylindrical body 20. A screw 78 is inserted from the inner surface side of the side plate 42 into the hole 63a of the attachment portion 63 along the upper edge of the side plate 42 and the hole 32a of the side wall 32 of the main body 21, and a nut 77 is screwed into the screw 78 from the outer surface side of the side wall 32. This fixes the upper edge portion of the side plate 42 to the side wall 32 of the main body 21.

[0037] 7, in the bottom panel portion 41, the wear-resistant layer 51 attached to the substrate 52 is composed of a plurality of ceramic tiles 51a. Each of these tiles 51a is formed in a rectangular shape in a plan view, and is attached to the substrate 52 while being arranged in the width direction and the length direction of the substrate 52.

[0038] 8, in the side panel portion 42, the wear-resistant layer 61 attached to the substrate 62 is composed of a plurality of ceramic tiles 61a. Each of these tiles 61a is formed in a quadrangular shape in a plan view, and is attached to the substrate 62 while being arranged in the width direction and the length direction of the substrate 62.

[0039] In the conveying equipment 1 equipped with the conveying path 10 having the above-mentioned configuration, granular material G sent by its own weight from the delivery path 3 of the hopper 2 to the conveying passage 4 slides down and passes through the conveying path 10 constituting the metallic foreign matter detector 12. At this time, metallic foreign matter mixed in with the granular material G is detected by the metal detection sensor 11 arranged on the outer periphery of the conveying path 10.

[0040] As described above, according to the transport path 10 of this embodiment, the inner peripheral surface of the cylindrical body 20 is covered with the inner surface plate 40 having the wear-resistant layers 51, 61 made of ceramic, which is a non-metallic material harder than the cylindrical body 20, thereby improving durability and extending the lifespan. In addition, generation of static electricity due to contact between the cylindrical body 20 made of a non-metallic material such as resin and the granular matter G is suppressed. In other words, static electricity that hinders detection of metallic foreign matter is suppressed, thereby improving the detection accuracy of the metal detection sensor 11 for metallic foreign matter.

[0041] Moreover, since the inner plate 40 is detachable, even if the inner plate 40 wears, only the inner plate 40 can be replaced without replacing the cylindrical body 20. This makes it possible to reduce maintenance costs. Also, the inner plate 40 can be easily replaced depending on the type of granular matter G to be inspected, and furthermore, the inner plate 40 can be removed for easy cleaning.

[0042] Therefore, the metal foreign matter detector 12 equipped with the transport path 10 and the metal detection sensor 11 has a long life and can be used for a long period of time by replacing the worn inner plate 40.

[0043] In addition, in the conveying path 10 of this embodiment, the bottom panel portion 41 and the side panel portion 42 constituting the inner plate 40 are each detachable from the cylindrical body 20, so that the bottom panel portion 41 and the side panel portion 42 can be replaced individually, thereby reducing the cost of replacement.

[0044] Moreover, since the wear-resistant layers 51, 61 are formed by attaching a plurality of ceramic tiles 51a, 61a to the substrates 52, 62, worn tiles 51a, 61a can be partially replaced, reducing replacement costs.

[0045] Moreover, the cylindrical body 20 has a main body 21 having an opening 35 at the top, and a lid 22 attached to the top of the main body 21 to close the opening 35, and the lid 22 is detachable from the main body 21. Therefore, by removing the lid 22, the state of wear and dirt on the inner surface plate 40 provided on the inner circumferential surface of the cylindrical body 20 can be easily visually confirmed.

[0046] In the above description, the material of the wear-resistant layers 51, 61 provided on the inner peripheral surface of the cylindrical body 20 has been described as ceramic, but the material is not limited to ceramic and may be any material having wear resistance and static electricity suppression properties equivalent to those of ceramic. For example, the material of the wear-resistant layers 51, 61 may be ultra-high molecular weight polyethylene. In addition, the non-metallic material harder than the cylindrical body 20 used as the wear-resistant layers 51, 61 includes those containing small amounts of metallic materials or magnetic materials that do not affect metal detection by the metal detection sensor 11.

[0047] The present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, etc. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary as long as the present invention can be achieved, and are not limited.

[0048] Here, the features of the embodiments of the transport path and metallic foreign matter detector according to the present invention described above will be briefly summarized and listed in the following [1] to [5]. [1] A conveying path (10) through which granular material (G) passes and on the outer periphery of which is disposed a metal detection sensor (11) for detecting metallic foreign matter present in the granular material (G), A non-metallic cylindrical body (20); an inner plate (40) provided on an inner peripheral surface of the cylindrical body (20) and having an abrasion-resistant layer (51, 61) made of a non-metallic material harder than the cylindrical body; having The inner surface plate (40) is detachable from the inner peripheral surface of the cylindrical body (20). [2] The conveying path described in [1], wherein the wear-resistant layer is made of ceramic. [3] The inner surface plate (40) is composed of a bottom surface plate portion (41) attached to the bottom of the cylindrical body (20) and a side surface plate portion (42) attached to the side of the cylindrical body (20), The conveying path according to [1], wherein the bottom plate portion (41) and the side plate portion (42) are each detachable from the cylindrical body (20). [4] The conveying path described in [1], wherein the inner plate (40) has a base plate (52, 62) to which a plurality of tiles (51a, 61a) made of a non-metallic material harder than the cylindrical body are attached, thereby forming the wear-resistant layer (51, 61). [5] The cylindrical body (20) has a main body (21) having an opening (35) at an upper portion thereof, and a cover (22) attached to an upper portion of the main body (21) to close the opening (35), The transport path according to [1], wherein the cover (22) is detachable from the main body (21). [6] A conveying path (10) according to any one of [1] to [5], which is installed in an inclined state and the granular material (G) passes through the inside by its own weight; a metal detection sensor (11) provided on the outer periphery of the conveying path (10); A metal foreign object detection device (12) comprising: [Explanation of symbols]

[0049] 10: Transport path 11: Metal detection sensor 12: Metal foreign object detector 20: Cylindrical body 21: Main body 22: Lid 35: Opening 40:Inner plate 41:Bottom plate part 42: Side plate part 51,61: Wear-resistant layer 51a, 61a: Tile 52, 62: Circuit board G: Granular matter

Claims

1. A conveying path (10) through which granular material (G) passes and on the outer periphery of which is disposed a metal detection sensor (11) for detecting metallic foreign matter present in the granular material, A non-metallic cylindrical body (20); an inner surface plate (40) provided on an inner peripheral surface of the cylindrical body and having an abrasion-resistant layer (51, 61) made of a non-metallic material harder than the cylindrical body; having The inner surface plate is detachable from the inner circumferential surface of the cylindrical body. Transport path.

2. The wear-resistant layer is made of ceramic. The transport path according to claim 1 .

3. The inner surface plate is composed of a bottom surface plate portion (41) attached to the bottom of the cylindrical body and a side surface plate portion (42) attached to the side of the cylindrical body, The bottom plate portion and the side plate portion are each detachable from the cylindrical body. The transport path according to claim 1 .

4. The inner surface plate is configured such that a plurality of tiles (51a, 61a) made of a non-metallic material harder than the cylindrical body are attached onto a substrate (52, 62) to form the wear-resistant layer. The transport path according to claim 1 .

5. The cylindrical body has a main body (21) having an opening (35) at an upper portion, and a cover (22) attached to the upper portion of the main body to close the opening, The cover is detachable from the main body. The transport path according to claim 1 .

6. The conveying path (10) according to any one of claims 1 to 5, which is installed in an inclined state and the granular material passes through the inside by its own weight; a metal detection sensor (11) provided on the outer periphery of the transport path; Equipped with A metal foreign object detection device (12).

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