JP5565863B2 - Continuous unloader bucket and method of repairing the bucket - Google Patents

Description

  The present invention relates to a bucket of a continuous unloader that unloads granular materials such as coal and ore from a ship, and a method for repairing the bucket.

  A continuous unloader is used to unload granular materials such as coal and ore from a ship at a port or the like. The continuous unloader includes a bucket elevator that can move up and down and swivel at the tip. In the bucket elevator, a plurality of buckets are connected to an annular endless bucket chain that meshes with the sprocket.

  When unloading the granular material, the bucket elevator is lowered into the hold. The bucket elevator conveys each bucket such that the opening is oriented substantially in the horizontal direction at a lower position. Generally, the bottom and side edges of each bucket are formed so as to spread outward. For this reason, when each bucket is conveyed substantially horizontally at the lower position, the granular material in the hold is scraped and accommodated in the interior.

  On the other hand, the bucket elevator inverts each bucket so that the opening faces downward at the upper position, and circulates the bucket. Here, the granular material filled in each bucket is discharged and transferred to the subsequent conveyor. From the above, it is possible to unload all the granular materials loaded on the ship by operating the bucket elevator while moving it up and down and turning.

  The edge that spreads outward to scrape off the granular material is an opening edge, so that the strength (bending rigidity) is weak and easily deformed, and the particle is easily rubbed and worn. From this, the structure which made the edge part thicker than the main-body part, and raised the intensity | strength of this part was employ | adopted many (for example, patent document 1). On the other hand, equipment troubles have been avoided by recognizing in advance a bucket that has been deformed by an inspection operation by a worker or a detection device and replacing it with a new bucket (for example, Patent Document 2).

JP2009-137679A (particularly, paragraph 5 on page 5) Utility Model Registration No. 3125546

  It is desired that the bucket of the continuous unloader has a shape suitable for scraping, is not easily deformed, and has wear resistance against particulate matter. In addition, it is also required to be light and have a sufficient volume and to secure a carrying capacity. Most of the current buckets are formed of a thin steel plate having a main body portion of about 5 to 6 mm (hereinafter, this portion is referred to as a “box portion”), and an edge that spreads outward to scrape granular materials is 12 to 16 mm. It is formed of a steel plate having a thickness of about a degree (hereinafter, this portion is referred to as a “protruding portion”). As a result, both strength and weight reduction are achieved.

  However, in such a bucket, an extreme thickness difference is generated between the box portion and the overhang portion. As a result, the overhanging part is moved inwardly due to the load applied when the bucket elevator moves up and down and swivel, contact with the bottom surface during bottom crawling work in the hold, and fatigue due to the continuation of particulate scraping work. There have been frequent occurrences of deformation such as bending, cracking due to wear-thinning of the bottom of the box, etc., and overall distortion and distortion.

  If the overhanging part is deformed so that it bends inward, even if the bucket is moved approximately horizontally, the bottom surface of the overhanging part just pushes away the particulate matter, and the particulate matter does not enter the bucket, so the scraping ability is greatly reduced. End up. Then, even if the continuous unloader is operated, cargo handling does not proceed and work efficiency is extremely reduced. Further, at the time of this deformation, if both ends of the overhanging portion are bent and protrude in the width direction, there is a possibility of colliding with the casing of the bucket elevator. A collision with the casing of the bucket elevator causes an emergency stop of the bucket elevator, which causes a long-term cargo stoppage and an increase in equipment repair costs. In order to avoid collision with the casing, it is often done by fusing and removing only the corners of the overhang protruding as a first aid, but in this case the tip of the overhang loses support and is more likely to bend. There is a problem of becoming.

  Further, when a crack occurs on the bottom surface of the box portion due to wear, the bending deformation to the inside of the overhang portion proceeds rapidly, and the granular material cannot be transported sufficiently, resulting in a decrease in transport capability. Further, when the bucket is distorted as a whole, the gap between the bucket chains on both sides cannot be kept constant, and the bucket chain may come off the sprocket or the bucket chain itself may be damaged. Therefore, it becomes impossible to operate due to equipment damage, leading to long-term cargo suspension and an increase in equipment repair costs.

  Here, it is conceivable to increase the wall thickness of the box portion or the overhang portion to prevent the above deformation, but in this case, the weight of each bucket increases, so that weight reduction cannot be achieved and the carrying capacity is hindered. (The drive motor becomes overloaded and the bucket cannot be turned). Also, even if a bucket that has been deformed is recognized in advance and replaced with a new bucket by inspection work by a worker or a detection device, the new bucket is usually delivered by a period (4 to 6 months) until delivery. Cost. In addition, since a new bucket is very expensive, there is a problem that costs increase.

  The present invention has been made in view of the above-described problems, and can prevent deformation and wear without causing an increase in weight, and can contribute to cost reduction and a bucket repair method thereof. The purpose is to provide.

  In order to solve the above problems, a typical configuration of the present invention is a bucket of a continuous unloader that is connected to a bucket chain that meshes with a sprocket and scrapes particulate matter, and includes a top surface, a bottom surface, both side surfaces, and a rear wall. A box-shaped box part, and a protruding part that protrudes outward from at least the bottom surface and both side edges of the box part, and is formed of a thick member having a higher strength than the box part, and the box part and the protruding part; It is characterized by having a bottom member that continues from at least a part of the bottom surface of the box portion to the tip of the overhang portion by being folded outward at the boundary.

  According to such a configuration, since the thick bottom member is provided from the bottom surface of the box portion to the tip of the overhang portion, the overhang portion can be prevented from being deformed so as to be bent inward. Further, since the bottom member is provided on the bottom surface of the box portion in the vicinity of the overhang portion, it is possible to avoid the occurrence of cracks due to wear thinning at this position. As a result, the frequency of exchanging with a new bucket is significantly reduced, and the cost can be reduced.

In particular, the overhang portion includes a corner member that is formed from a thick member and forms a part of the truncated cone, and is disposed from the bottom surface to the side surface of the box portion. radius of curvature, and size Kuna' than the radius of curvature of the edge of the box portion.

  According to this configuration, the strength on the opening side of the corner member is higher than that on the box portion side. By increasing the strength on the opening side of the corner member, it is possible to suppress the two ends from being pulled in the width direction, and to reduce the possibility of colliding with the casing of the bucket elevator. In addition, since the bottom surface and the side surface of the overhanging portion are abutted (welded) to a corner member having high strength on the opening side, it is possible to suppress the bucket from being bent and generating distortion as a whole. Accordingly, the gap between the bucket chains can be kept constant, and the possibility that the bucket chain is detached from the sprocket or the bucket chain itself is damaged can be reduced.

  The side surface of the overhanging portion is open to the outside on the lower side rather than the upper side, and is formed of a thick member and includes a first side extending member having a substantially triangular shape including an edge on the box portion side and the upper side, and a thick member. It is good to be comprised from the substantially 2nd side extending member of the substantially triangle containing the edge and lower side of the opening side.

  According to this configuration, since the lower side of the side surface of the overhanging portion opens outward, the granular material can be scraped off suitably. Here, by making both the first side extending member and the second side extending member substantially triangular, the opening angle between the upper side of the side surface formed by the first side extending member and the lower side of the side surface formed by the second side extending member is set. Can be different. Therefore, regardless of the angle of the upper side of the side surface, the second side extending member can be smoothly abutted against and joined to the corner member. In addition, a substantially triangular first side extending member and a second side extending member, a bottom member obtained by bending a flat plate, and a corner member that is a part of a truncated cone are all formed into a basic shape (primitive shape). be able to. Therefore, although it is a thick steel plate that is difficult to process in the first place, it can be easily manufactured and the welding operation is also facilitated. Moreover, since it is a basic shape, it can be stacked, so it does not take up space for transportation and storage. For this reason, bucket maintenance management becomes very simple.

  In addition, in the structure mentioned above, the weight of a box part does not increase except the contribution of a bottom member. In addition, since the overhanging portion is originally formed thick, the weight of the overhanging portion does not increase. As a result, the weight does not increase, the driving motor is not overloaded, and deformation and wear can be prevented.

  In order to solve the above-mentioned problems, another typical configuration of the present invention includes a box-shaped box portion including an upper surface, a bottom surface, both side surfaces, and a rear wall, and at least the bottom surface and both side surfaces of the box portion outside the edges. A method for repairing a bucket of a continuous unloader including an overhanging portion, wherein the overhanging portion is cut from the bottom surface and both side edges of the existing box portion, and at least a part of the bottom surface of the box portion is cut. A step of notching, a notched bottom surface, consisting of a thick member having a strength higher than each surface of the box part, welding a bottom member folded outward at the edge of the box part, and on both sides of the bottom member, A step of welding a square member extending from the bottom surface to the side surface of the box portion made of a thick member, and a substantially triangular first side extending member including the upper side of the side surface of the protruding portion made of a thick member at the side surface edge of the box portion A thick portion on the first side extending member and the square member A step of welding the second Gawanobe members generally triangular consisting characterized in that it comprises a.

  According to such a configuration, an existing bucket that has been deformed or worn can be modified to a stronger structure and reused. Therefore, it does not require a period until delivery as in the case of a new bucket, and a high purchase cost is not required, so that the cost can be reduced. In addition, the component based on the technical idea of the bucket of the continuous unloader mentioned above and its description are applicable also to the said repair method.

  ADVANTAGE OF THE INVENTION According to this invention, a deformation | transformation and wear can be prevented without incurring a weight increase, and the bucket of the continuous type unloader which can contribute to cost reduction, and its bucket repair method can be provided.

1 is an external view of a continuous unloader to which a bucket according to a first embodiment of the present invention is applied. It is an enlarged view of the bucket elevator of FIG. It is a figure which shows the structure of the bucket concerning 1st Embodiment. It is a figure which shows the repair procedure to the bucket concerning 1st Embodiment. It is a figure which shows the structure of the bucket concerning 2nd Embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

[First embodiment]
(Continuous unloader)
FIG. 1 is an external view of a continuous unloader 100 to which a bucket 110 according to a first embodiment of the present invention is applied. As shown in FIG. 1, the continuous unloader 100 is installed in a harbor or the like, and is used for unloading a granular material 204 such as coal or ore from a ship 200. The unloading of the granular material 204 is performed by lowering the bucket elevator 102 that can move up and down and swivel into the hold 202, scraping the granular material 204, and delivering it to the subsequent conveyor 104.

  FIG. 2 is an enlarged view of the bucket elevator 102 of FIG. As shown in FIG. 2, a plurality of buckets 110 (indicated as individual buckets 110 a to 110 o) are coupled to the bucket elevator 102 to an annular endless bucket chain 108 that meshes with the sprockets 106 a and 106 b. These buckets 110 circulate in the direction of arrow R.

  In the bucket 110, a box-shaped box part 116 forms a main body part, and an overhanging part 118 is formed on the edge of at least the bottom surface and both side surfaces of the box part 116 so as to project outward. Here, the box part 116 and the overhang | projection part 118 are comprised with the general steel plate, for example, the box part 116 is manufactured with the 6mm steel plate, and the overhang | projection part is manufactured with the 12-16mm steel plate.

  At a position below the bucket elevator 102, the buckets 110a to 110f are transported in a state of being suspended by the bucket chain 108 so that the opening is directed in a substantially horizontal direction. Thereby, the overhanging portion 118 scrapes off the granular material 204 loaded in the hold 202 and accommodates it inside the box portion 116.

  The buckets 110g to 110i scraped off the granular material 204 are conveyed upward through the casing 102a of the bucket elevator 102 with the opening facing upward. And if it reaches the upper part of the bucket elevator 102, it will be reversed so that opening may face downward, and the granular material 204 is delivered to the conveyor 104 (refer FIG. 1).

  The buckets 110j to 110o that have delivered the granular material 204 are conveyed while being inverted to a position below the bucket elevator 102. After that, the process is repeated by being suspended by the bucket chain 108 so that the opening is again directed substantially in the horizontal direction.

  The bucket 110 receives a large load when the bucket elevator 102 moves up and down and turns. In particular, the buckets 110a to 110f at positions below the bucket elevator 102 are in contact with the bottom of the bottom during the bottoming operation in the hold 202, and are subject to thrust by the tanker moving up and down by waves. 204 wear due to continuing scraping work. Due to these reasons, the bucket 110 is likely to be deformed or cracked. On the other hand, in the present embodiment, the bucket 110 has the following structure, thereby obtaining high durability without causing an increase in weight.

(Bucket structure)
FIG. 3 is a diagram illustrating the structure of the bucket 110 according to the first embodiment. 3A is a perspective view of the bucket 110, and FIG. 3B is a front view of the bucket 110. As shown in FIGS. 3A and 3B, as described above, the bucket 110 includes the box portion 116 and the overhang portion 118. The box 116 includes an upper surface 116a, a bottom surface 116b, side surfaces 116c and 116d, and a rear wall 116e.

  In the bucket 110 of the present embodiment, a bottom member 122 that is folded outward (mountain fold) at the boundary between the bottom surface 116b and the overhanging portion 118 and continues from a part of the bottom surface 116b to the tip of the overhanging portion 118 is disposed. Has been. That is, the bottom member 122 is also a part of the bottom surface 116 b of the box part 116 and a part of the overhang part 118. The bottom member 122 is constructed to be thicker (for example, a 12 mm steel plate) than the steel plate constituting each surface of the box portion 116.

  The bottom member 122 prevents a wall thickness difference from occurring at the boundary between the overhanging portion 118 and the box portion 116 on the bottom surface side of the bucket 110. Further, since the bottom member 122 is thicker than the box part 116 and the bottom member 122 is bent at the boundary between the box part 116 and the overhanging part 118, the rigidity of the bottom member 122 is increased. As a result, it is possible to prevent the protruding portion 118 from being bent inward in the vicinity of the protruding portion 118 of the box portion 116.

  Further, since the bottom member 122 is provided on the bottom surface 116b of the box portion 116 in the vicinity of the overhang portion 118, it is possible to avoid the occurrence of cracks due to wear thinning at this position. Note that a particularly suitable effect can be obtained when the bottom member 122 protrudes 10 cm or more as a part of the bottom surface 116b.

  The side surface of the overhanging portion 118 is open to the outside on the lower side rather than the upper side, and has a shape that allows the granular material to be scraped off together with the bottom member 122. In this embodiment, the side surface of the overhanging portion 118 includes first side extending members 126a and 126b including an edge and an upper side on the box portion 116 side, and second side extending members 128a and 128b including an opening side edge and a lower side. Consists of The first side extending members 126a and 126b and the second side extending members 128a and 128b are constructed to be thicker than the steel plates constituting each surface of the box portion 116 (same thickness as the bottom member 122, for example, 12 mm) can do).

  The first side extending members 126a and 126b are elongated and substantially right-angled triangles, and the second side extending members 128a and 128b are elongated and substantially isosceles triangles. By joining the first side extending members 126a, 126b with the right-angled part up to the edge of the box part 116, and joining the second side extending members 128a, 128b to the oblique sides thereof with the tips of the isosceles side up, A side surface of the overhang portion 118 is configured.

  Corner members 132a and 132b each forming a part of a truncated cone are disposed on the left and right corners of the lower portion of the overhang portion 118, respectively. The corner members 132a and 132b are disposed from the bottom surface 116b to the side surface 116c or the side surface 116d of the box portion 116, and play a role of connecting the bottom member 122 and the second side extending member 128a or the second side extending member 128b. ing. The corner members 132a and 132b are constructed to be thicker than the steel plate constituting each surface of the box portion 122 (the thickness may be the same as the bottom member 122, for example, 12 mm).

  In the corner members 132a and 132b, the radius of curvature of the edge on the opening side is set larger than the radius of curvature of the edge on the box portion 116 side. As a specific example, the curvature radius on the opening side of the corner members 132a and 132b can be 195 mm, and the curvature radius on the box 116 side can be 120 mm. In general, the bending rigidity with respect to a load is stronger on a curved surface convex toward the load receiving side than on a flat surface. Therefore, when the direction of the load received by the overhanging portion 118 is taken into consideration, the deformation of the overhanging portion 118 is stronger when the curvature of the corner members 132a and 132b is reduced (the curvature radius is increased). Therefore, the strength on the opening side of the corner members 132a and 132b can be ensured by adopting the shape as described above. As a result, it is possible to prevent the both ends from being bent in the width direction, and to reduce the possibility of collision with the casing 102a of the bucket elevator 102.

  Here, the first side extending members 126a and 126b and the second side extending members 128a and 128b are both substantially triangular so that the upper sides of the side surfaces formed by the first side extending members 126a and 126b and the second side extending members The opening angle of the lower side of the side surface formed by 128a and 128b can be varied. Therefore, regardless of the angle of the upper side of the side surface, the second side extending members 128a and 128b can be smoothly abutted and joined to the corner members 132a and 132b. Thus, since the bottom member 122, the first side extending members 126a and 126b, and the second side extending members 128a and 128b are abutted against the corner members 132a and 132b having high strength on the opening side, the bucket Can be prevented from being distorted. Therefore, the gap between the bucket chains 108 can be kept constant, and the possibility that the bucket chain 108 may come off the sprockets 106a and 106b or the bucket chain 108 itself may be damaged can be reduced.

  It should be noted that steps due to differences in thickness occur between the side surface 116c and the first side extending member 126a, between the side surface 116d and the first side extending member 126b, and between the bottom surface 116b and the bottom member 122. The trajectory is crank-shaped and not continuous. Therefore, according to the structure of the bucket 110 of the present embodiment, it is also possible to suppress bending around this boundary.

  The structure of the bucket 110 described above is not only high in durability of newly created items, but also suitable for maintenance of existing buckets 110. A portion of the bucket 110 that is particularly easily worn or damaged by use is an overhang portion 118. And according to the said structure, the member of the overhang | projection part 118 which should be replaced | exchanged is the bottom member 122 formed by bending a flat plate (steel plate), the substantially triangular first side extending members 126a and 126b, and the 2nd side extending member 128a. , 128b, and seven members of the basic shape (primitive shape) of the corner members 132a, 132b forming a part of the truncated cone. By forming these seven members in a primitive shape, a replacement member can be easily manufactured even for a thick steel plate that is difficult to process, and welding work is also easy. Moreover, since it is a basic shape, it can be stacked, so it does not take up space for transportation and storage.

  Moreover, it is also possible to modify an existing product (bucket having a conventional structure) to the above structure. The conventional structure refers to a structure in which the overhanging portion 118 is formed by bending a single thick steel plate. In this case, even if the above seven members are constructed with a wall thickness (for example, 12 mm), the overhanging portion 118 is originally formed with a wall thickness (for example, 12 to 16 mm) even in a bucket having a conventional structure. The increase in weight of the bucket 110 can be kept to a minimum or the same level as the current state. Therefore, since the weight balance of the whole equipment can be maintained, the driving power of the driving motor for the bucket elevator 102 can be reduced.

  In the present embodiment, the buckets 110 are all made of steel plates, and no non-magnetic material such as stainless steel or resin is used. By forming each bucket 110 from a steel plate, even if the bucket 110 comes into contact with the casing 102a or the like of the bucket elevator 102 and breaks and the fragments are mixed, it can be removed as a foreign matter by an electromagnet or the like. Thereby, it can prevent damaging a crusher (crusher), a crusher (mill), a conveyor belt, etc. of a post process.

(Repair method)
FIG. 4 is a diagram illustrating a modification procedure for the bucket 110 according to the first embodiment. First, as shown in FIG. 4A, a bucket 114 that has been deformed or cracked is found and removed from the bucket elevator 102 by an operator's inspection work or a detection device.

  Next, as shown in FIG. 4B, the bottom surface 116b of the box portion 116 of the bucket 114 and the projecting portion 118 deformed from the edges of the side surfaces 116c and 116d are cut, and at least the bottom surface 116b of the box portion 116 is Cut out a part (10 cm or more). If there is a crack in the bottom surface 116b due to wear or the like, the crack is included in the notch.

  Next, as shown in FIG. 4 (c), using a semi-automatic welding machine (not shown), the above-mentioned cut portion and the cut-out portion have a bottom member 122, first side extending members 126a and 126b, and a second portion. The side extending members 128a and 128b and the corner members 132a and 132b are welded.

  In addition, as shown in FIG.4 (d), you may spray the rust prevention material 136 containing aluminum to the welding part of the bucket 114 additionally. Thereby, the repair work to the bucket 110 according to the present embodiment is completed.

  According to the above-described repair method, the existing bucket 114 that has been deformed or worn can be easily repaired and reused. Therefore, since the frequency of ordering new buckets is significantly reduced, the waiting period until delivery can be reduced and the cost can be significantly reduced.

  In the above description, the case where the projecting portion 118 is cut from the bottom surface to the side surface and the bottom member 122, the first side extending members 126a and 126b, the second side extending members 128a and 128b, and the corner members 132a and 132b are welded is described. However, the repair method is not limited to this. When the locally deformed and worn bucket 114 is repaired, it is possible to cut only the target portion and weld only the member corresponding to that portion.

[Second Embodiment]
(Bucket structure)
FIG. 5 is a diagram showing the structure of the bucket 112 according to the second embodiment of the present invention. 5A is a perspective view of the bucket 112, and FIG. 5B is a front view of the bucket 112. As shown in FIGS. 5A and 5B, the bucket 112 according to the second embodiment is replaced with the first side extending members 126a and 126b and the second side extending members 128a and 128b shown in FIG. Rectangular side extending members 130a and 130b are employed. Similarly, flat corner members 134a and 134b are employed in place of the curved corner members 132a and 132b shown in FIG. That is, as compared with the bucket 110, the bucket 112 does not have a divergent opening edge.

  The rectangular side extending members 130 a and 130 b are constructed to be thicker than the steel plates that constitute each surface of the box portion 116. The upper side is connected to the upper corner of the overhanging portion 120, and the lower side is connected to the corner members 134a and 134b of the lower portion of the overhanging portion 120 to constitute the side surface of the overhanging portion 120.

  The corner members 134a and 134b arranged at the lower part of the overhang portion 120 are substantially trapezoidal flat plate shapes. Even with such flat plate-like corner members 134a and 134b, a certain degree of strength can be secured. The corner members 134a and 134b are also constructed to be thicker than the steel plates constituting each surface of the box portion 122.

  According to the above-described configuration, a strong bucket 112 is realized with five primitive-shaped members. In particular, since flat corner members 134a and 134b are employed in place of the curved corner members 132a and 132b, manufacturing and welding operations can be performed more easily than in the first embodiment. Therefore, it is possible to manage the bucket more easily.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. According to the embodiment, it is possible to provide the buckets 110 and 112 that can suppress the occurrence of deformation and cracks and reduce the risk of causing a long-term cargo handling stoppage or an increase in equipment repair costs. Needless to say, the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  INDUSTRIAL APPLICATION This invention can be utilized for the bucket of the continuous unloader which unloads granular materials, such as coal and an ore, from a ship, and its bucket repair method.

DESCRIPTION OF SYMBOLS 100 ... Continuous unloader, 102 ... Bucket elevator, 102a ... Casing, 104 ... Conveyor, 106a, 106b ... Sprocket, 108 ... Bucket chain, 110 (110a-110o), 112 ... Bucket, 114 ... Deformed, worn bucket, 116 ... Box, 116a ... Top, 116b ... Bottom, 116c, 116d ... Side, 116e ... Rear wall, 118,120 ... Overhang, 122 ... Bottom member, 126a, 126b ... First side extending member, 128a, 128b ... Second side extending member, 130a, 130b ... Rectangular side extending member, 132a, 132b, 134a, 134b ... Square member, 136 ... Rust prevention material, 200 ... Ship, 202 ... Ship hold, 204 ... Granular

Claims (3)

It is connected to a bucket chain that meshes with a sprocket, and is a continuous unloader bucket that scrapes off particulate matter,
A box-shaped box composed of a top surface, a bottom surface, both side surfaces and a rear wall;
An overhanging portion projecting outward from at least the bottom surface and the edges of both side surfaces of the box portion;
With
Formed by a thick member having a strength higher than that of the box part, and folded outward at the boundary between the box part and the overhanging part, so that from at least a part of the bottom surface of the box part to the tip of the overhanging part have a continuous bottom member,
The overhang portion includes a corner member that is formed from the thick member and forms a part of a truncated cone, and is disposed from the bottom surface to the side surface of the box portion,
A bucket of a continuous unloader , wherein a radius of curvature of an edge on the opening side of the corner member is larger than a radius of curvature of an edge on the box side . The side surface of the overhanging portion is open to the outside on the lower side rather than the upper side,
A substantially triangular first side extending member that is formed of the thick member and includes an edge and an upper side on the box side;
2. The continuous unloader bucket according to claim 1, wherein the bucket is formed of the thick member and includes a substantially triangular second side extending member including an opening-side edge and a lower side. A method of repairing a bucket of a continuous unloader, comprising a box-shaped box portion including an upper surface, a bottom surface, both side surfaces, and a rear wall, and an overhanging portion projecting outward from at least the bottom surface and both side surface edges of the box portion ,
Cutting the overhang from the bottom of the existing box and the edges of both sides, and notching at least a portion of the bottom of the box;
Welding the bottom member, which is made of a thick member having a higher strength than each surface of the box portion, and is folded outward at the edge of the box portion, to the cut-out bottom surface;
Welding a square member that extends from the bottom surface to the side surface of the box portion, on both sides of the bottom member;
Welding a substantially triangular first side extending member made of the thick member and including an upper side of the side surface of the overhanging portion to a side edge of the box portion;
Welding a substantially triangular second side extending member made of the thick member to the first side extending member and the corner member;
A method of repairing a bucket of a continuous unloader characterized by comprising:

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