JP6627369B2 - Bucket, bucket manufacturing method, and bucket-type transfer device - Google Patents

Description

  The present invention relates to a bucket capable of storing an object to be transported, a method for manufacturing such a bucket, and a bucket-type transport apparatus that transports an object to be transported using such a bucket.

  2. Description of the Related Art Conventionally, an apron bucket conveyor (hereinafter, also referred to as a “bucket conveyor”) described in Patent Document 1 has been used as a bucket-type transfer device that stores and transfers a conveyed object such as a granular material in a bucket supported by an endless chain. )It has been known. Each bucket of the bucket conveyor has a pair of left and right side plates supported by a pair of left and right endless chains, and a housing concave portion having one side opened by being assembled between the two side plates in a substantially U-shaped state. And a concave portion forming member made of a bent plate material or the like.

JP 2004-189364 A

  By the way, in the bucket conveyor of patent document 1, both right and left ends of the recess forming member in the bucket are joined to the inner surfaces of the left and right side plates. In other words, while the concave portion forming member is positioned at a predetermined position on the inner side surfaces of the left and right side plates using a dedicated jig, the positional deviation from that position is suppressed by the dedicated jig, The left and right ends are joined to the inner surface of the side plate by fillet welding. Therefore, there is a problem that the manufacture of the bucket cannot be easily performed because a dedicated jig for performing the alignment and suppressing the displacement is required.

  SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and a purpose thereof is to provide a bucket which can be easily manufactured without a dedicated jig for positioning and suppressing displacement, and such a bucket. It is an object of the present invention to provide a manufacturing method of the present invention and a bucket-type transfer device for transferring an article to be transferred using such a bucket.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A bucket that solves the above-mentioned problem is a pair of side plates whose inner side faces are opposed to each other, and a recess forming member that forms an accommodation recess whose one surface side is opened in cooperation with the pair of side plates when assembled to the pair of side plates. The side plate is provided with a locking portion that locks the concave portion forming member in a positioning state in a direction along an inner side surface of the side plate.

  According to this configuration, if the concave portion forming member is locked to the locking portion provided on the side plate, the concave portion forming member cooperates with the both side plates to form an accommodation concave portion having an opening on one surface side, and between the two side plates. The side plate is maintained in a positioning state in which movement in the direction along the inner side surface is restricted. Therefore, the work of welding the concave portion forming member to the inner surface of the side plate can be easily performed without holding the concave portion forming member in the positioning state with respect to the side plate using a dedicated jig.

  In the bucket, it is preferable that the locking portion is formed of a locking recess that allows at least a part of an end of the recess forming member to be inserted from a direction crossing an inner surface of the side plate.

  According to this configuration, if at least a part of the end portion of the concave portion forming member is inserted into the locking concave portion provided in the side plate from a direction intersecting the inner side surface of the side plate, the concave portion forming member is inserted into the side plate between the both side plates. The positioning in the direction along the side surface is kept restricted. Then, in this state, if the end of the concave portion forming member is fillet welded to the inner surface of the side plate, a housing concave portion having an open surface on one side is easily formed between both side plates.

  In the bucket, the side plate may have the locking recesses at a plurality of locations, and an end of the recess forming member may have a plurality of locking projections individually corresponding to the locking recesses. Is preferred.

According to this configuration, by locking the plurality of locking protrusions to the plurality of locking recesses, it is possible to further suppress the possibility that the recess forming member is displaced in the direction along the inner surface of the side plate.
Further, in the bucket, the recess forming member is a single plate member integrally having a portion serving as a bottom wall, a portion serving as a front wall, and a portion serving as a rear wall of the housing recess, and an end of the single plate material. It is preferable that the portion is locked to the locking portion of the side plate.

  According to this configuration, for example, both ends of a U-shaped single plate whose cross-sectional shape is deformed are provided on the pair of side plates at the portion serving as the bottom wall, the portion serving as the front wall, and the portion serving as the rear wall. If the locking portions are locked to both locking portions, an accommodating concave portion having an opening on one surface side is easily formed between both side plates.

  Next, a method of manufacturing a bucket that solves the above-mentioned problem is that, in cooperation with a pair of side plates whose inner surfaces are opposed to each other, an end of a concave portion forming member capable of forming an accommodation concave portion whose one surface side is open is formed on the pair of side plates. An assembling step of engaging and locking the provided locking portion in a direction along the inner side surface of the side plate and assembling, and holding the positioning portion with respect to the side plate by locking the locking portion; Welding the formed end of the concave portion forming member to the inner surface of the side plate.

  According to this configuration, even if there is no dedicated jig, the recess forming member is held in the positioning state in the assembling step, so that the welding operation can be performed in a stable state in the welding step. Therefore, when manufacturing the bucket with the recess forming member, the same effect as in the case of the bucket having the above configuration can be enjoyed.

Further, a bucket-type transport device that solves the above problem includes a bucket having the above-described configuration, and an endless chain that is provided to be able to move around while supporting the bucket.
According to this configuration, the same effect as in the case of the bucket having the above configuration can be obtained in the bucket-type transport device.

  ADVANTAGE OF THE INVENTION According to this invention, a bucket can be easily manufactured without a special jig for positioning and suppressing displacement, and a conveyed object can be transported using such a bucket. .

FIG. 1 is a partially cutaway side view schematically showing the entire structure of an embodiment of a bucket conveyor. The perspective view showing the state where a plurality of buckets were assembled to the endless chain. The perspective view which shows the state which separated the endless chain and the bucket. FIG. 3 is an exploded perspective view of a bucket. FIG. 4 is a side view of a recess forming member in the bucket. The side view of the side plate in a bucket. Sectional drawing which shows the positional relationship of the recessed part formation member of the buckets adjacent in the front-back direction. Sectional drawing which shows the mutual positional relationship of the recessed part formation member of the buckets of a comparative example. Sectional drawing of the bucket conveyed in the horizontal direction passing through the lower position of an insertion port in the state which made the opening of the accommodation recessed upward. Sectional drawing of the bucket of the location where a conveyance direction is changed from a horizontal direction to a vertical direction. Sectional drawing of the bucket of the location where a conveyance direction is changed from a vertical direction to a horizontal direction. Sectional drawing of the bucket turned over so that the opening of an accommodation recessed part may turn downward from the upward at the position above a discharge opening.

  Hereinafter, an embodiment of a bucket conveyor, which is an example of a bucket-type transfer device, will be described with reference to the drawings together with a structure and a manufacturing method of the bucket. In addition, in the following description, when indicating the front-back direction, the left-right direction, and the up-down direction, it is assumed that the direction shown in FIG.

  As shown in FIG. 1, the bucket conveyor 11 of the present embodiment has a so-called crank-shaped conveyor case 12 whose overall shape in a side view is bent at two points in a length direction. The conveyor case 12 includes a rectangular cylindrical lower case 13 extending in the front-rear direction, a rectangular cylindrical upper case 14 extending upward and downward from the lower case 13, and a lower case 13 and an upper case 14. And a quadrangular cylindrical intermediate case 15 extending vertically. The front end of the lower case 13 and the lower end of the intermediate case 15 are connected in a bent manner via the lower connection case 16, and the rear end of the upper case 14 and the upper end of the intermediate case 15 are connected via the upper connection case 17. And are connected in a bent shape.

  A driving sprocket 18 is supported at the front end in the upper case 14 so as to be rotatable around a shaft 18a extending in the left-right direction, while a driven sprocket 19 is mounted on the rear end in the lower case 13 in the left and right directions. It is rotatably supported about a shaft 19a along the direction as a rotation center. A drive motor 20 is provided on the upper surface of the upper case 14, and an output sprocket 21 is fixed to an output shaft 20a of the drive motor 20 so as to rotate in synchronization with the output shaft 20a. An endless driving force transmission chain 22 is mounted between the output sprocket 21 and the driving sprocket 18 so that the driving sprocket 18 rotates with the driving rotation of the driving motor 20.

  In the conveyor case 12, an endless endless chain 23 is mounted between the driving sprocket 18 and the driven sprocket 19. Also, a lower intermediate sprocket 24 that makes a pair for the forward path and the return path is rotatably supported in the lower connecting case 16 around a shaft 24a extending in the left-right direction and is rotatably supported in the upper connecting case 17. Similarly, a pair of upper intermediate sprockets 25 are supported rotatably about a shaft 25a extending in the left-right direction. The endless chain 23 is bent and mounted on each of the intermediate sprockets 24 and 25, thereby forming an endless circulation path in the conveyor case 12.

  Further, the endless chain 23 supports a plurality of buckets 26 capable of storing a conveyed object W such as a granular material (see FIG. 9) so as to be adjacent to each other in the front-rear direction. In the conveyor case 12, an inlet 27 for the article W to be transported is formed at a position near the rear end of the upper wall portion 13 a of the lower case 13, while being located below the driving sprocket 18 in the upper case 14. At the position, a discharge port 28 for the transferred object W is formed. That is, when each bucket 26 passes below the loading port 27 as the endless chain 23 circulates, the transported object W loaded from above can be accommodated therein. When the transported object W is moved to the position, the transported object W accommodated therein can be discharged downward from the discharge port 28 by reversing its posture (see FIG. 12).

  As shown in FIGS. 2 and 3, the endless chain 23 is constituted by a pair of left and right chain members arranged in parallel at a predetermined interval in the left and right direction. It is assembled in between. That is, in each endless chain 23, the link plate 29 of the link 30 composed of the pair of left and right link plates 29 facing each other is connected to the link plate 29 of the other link 30 adjacent in the series direction (front-back direction). It is rotatably connected by a connecting pin 31. The bucket 26 is supported by the endless chain 23 via a support piece 32 projecting from the link plate 29 in the horizontal direction.

  In addition, between the pair of left and right link plates 29 in the endless chain 23, a cylindrical bush (not shown) is inserted with the connecting pin 31 so as to keep the distance between the left and right link plates 29 facing each other. The roller 33 is rotatably mounted on the bush. The teeth (not shown) of each of the sprockets 18, 19, 24, and 25 mesh between the rollers 33 adjacent to each other in the front-rear direction. Accordingly, in this state, the drive side sprocket 18 is driven and rotated based on the driving force of the drive motor 20, so that the endless chain 23 moves around the endless circulation path formed in the conveyor case 12.

  Incidentally, the drive-side sprocket 18 in the present embodiment has eight teeth as an example. Therefore, when the bucket 26 supported so as to be adjacent to the endless chain 23 in the front-rear direction passes through a place where the chain is bent such as in the lower connection case 16 as the endless chain 23 circulates, the other bucket Incline by 45 degrees (= 360 degrees / 8) with respect to 26.

  As shown in FIG. 3 and FIG. 4, the bucket 26 has a pair of left and right side plates 35 whose inner side surfaces 34 face each other, and cooperates with both side plates 35 when assembled to the pair of side plates 35. 3 includes a concave portion forming member 37 that forms a housing concave portion 36 that is open at the upper surface side and a fixing piece portion 38 that fixes the side plate 35 to the support piece portion 32 of the endless chain 23. That is, the fixing piece 38 attached to the side plate 35 so as to protrude horizontally from the outer surface 39 of the side plate 35 is attached to the support piece 32 of the endless chain 23 by a fastening member such as a bolt or a nut (not shown). A) fixed through.

  As shown in FIGS. 4 and 5, the concave portion forming member 37 has a substantially rectangular cross section formed by bending a single metal plate having a substantially rectangular shape at a plurality of portions in the longitudinal direction, which is the length direction thereof. It is formed so as to form a U-shape. That is, in the present embodiment, as an example, a single flat plate-shaped material is bent into valley folds or mountain folds at six locations in its length direction, so that a total of seven strip-shaped plate portions 41 extending in the left-right direction are provided. , 42, 43, 44, 45, 46, 47, a recess forming member 37 having a substantially U-shaped cross section is formed.

  That is, the concave portion forming member 37 of the present embodiment is configured such that a predetermined width from one end (the front end in the drawing) in the length direction to the rear is elongated in the left-right direction as the first plate portion 41. A second plate portion 42 having a width wider than the first plate portion 41 is bent from the rear end toward the inside of the accommodation concave portion 36 so as to form a mountain fold. Further, from the rear end of the second plate portion 42, a third plate portion 43 whose width (in this case, the width in the front-rear direction) is substantially the same as the width of the second plate portion 42 is directed toward the inside of the accommodation recess 36. It is bent to form a valley fold. The third plate portion 43 is a portion that becomes the bottom wall of the storage recess 36 during horizontal transport in which the bucket 26 is transported horizontally with the opening 48 (see FIG. 5) of the storage recess 36 facing upward. The bending angle θ1 between the plate portion 42 and the third plate portion 43 is set to an obtuse angle (for example, 125 degrees).

  As shown in FIG. 5, when the third plate portion 43 serves as a bottom wall of the housing recess 36, the second plate portion 42 and the second plate portion 42 that are connected to the front end of the third plate portion 43 so as to rise forward. The first plate portion 41, which is connected to the upper end of the housing so as to rise forward, forms the front side wall of the accommodation recess 36. Incidentally, the bending angle (= θ1 + θ2) between the first plate portion 41 and the second plate portion 42 is set to an obtuse angle larger than the bending angle θ1 between the second plate portion 42 and the third plate portion 43. In this case, the first plate portion 41 subtracts the bend angle θ1 between the second plate portion 42 and the third plate portion 43 from the bend angle between the first plate portion 41 and the second plate portion 42 (= θ1 + θ2). A forward rising plate portion which rises forward at an acute angle (for example, less than 45 degrees) with respect to the horizontal line H by the angle θ2.

  Further, from the rear end of the third plate portion 43, a fourth plate portion 44 having a width smaller than that of the third plate portion 43 is bent so as to form a valley fold toward the inside of the accommodation recess 36, and the fourth plate portion is formed. From the rear end (in this case, the upper end) of the portion 44, a fifth plate portion 45 having a width smaller than that of the fourth plate portion 44 and substantially the same width as the first plate portion 41 is folded inward into the accommodation recess 36. It is bent to become. From the rear end (the upper end in this case) of the fifth plate portion 45, a sixth plate portion 46 that is substantially parallel to the second plate portion 42 and has a wider width than the second plate portion 42 is directed toward the inside of the accommodation recess 36. The sixth plate portion 46 is bent so as to form a valley fold, and a seventh plate portion 47 having a width narrower than the first plate portion 41 is inserted into the housing recess 36 from the rear end (in this case, the upper end) of the sixth plate portion 46. It is bent to form a valley fold.

  As shown in FIG. 5, when the third plate portion 43 serves as the bottom wall of the housing recess 36, the fourth plate portion 44 rising from the rear end of the third plate portion 43 and the upper end of the fourth plate portion 44 The fifth to seventh plate portions 45 to 47 successively arranged upward from above constitute the rear side wall of the accommodation recess 36. In this case, the fourth plate portion 44 that rises from the rear end of the third plate portion 43 is bent downward from the lower end of the fifth plate portion 45 that is the front lowering plate portion, and the third plate portion 43 that is the bottom wall is bent. It functions as a rear connection plate part connected to the rear end of the rear panel.

  In this case, the bending angle θ3 between the third plate portion 43 and the fourth plate portion 44 is smaller than the bending angle θ1 between the second plate portion 42 and the third plate portion 43 (for example, 94 degrees). Is set to The bending angle (= θ3 + θ4) between the fourth plate portion 44 and the fifth plate portion 45 is set to an obtuse angle that is larger than the bending angle θ3 between the third plate portion 43 and the fourth plate portion 44. The fifth plate portion 45 in this case subtracts the bend angle θ3 between the third plate portion 43 and the fourth plate portion 44 from the bend angle between the fourth plate portion 44 and the fifth plate portion 45 (= θ3 + θ4). A forward-falling plate portion that falls forward (backward) at an acute angle (for example, 45 degrees) with respect to the horizontal line H by the angle θ4.

  The bending angle (= θ4 + θ5) between the fifth plate portion 45 and the sixth plate portion 46 is slightly smaller than the bending angle θ3 between the third plate portion 43 and the fourth plate portion 44 (for example, 90 degrees). ) Is set to In this case, the sixth plate portion 46 forms an acute angle (for example, 45 degrees) with respect to the horizontal line H by an angle θ5 obtained by bisecting a bending angle (= θ4 + θ5) between the fifth plate portion 45 and the sixth plate portion 46. It constitutes a rear lowering plate part which becomes lower rearward (frontward upward). The seventh plate portion 47 extends forward from the rear end (the upper end in FIG. 5) of the sixth plate portion 46 in the horizontal direction.

  In the present embodiment, the front end (the front end and the upper end in FIG. 5) of the first plate portion 41 constitutes a front end edge 48a along the left and right direction of the rectangular opening 48 of the accommodation recess 36, and the seventh plate portion. The front end (the front end and the upper end in FIG. 5) of the portion 47 constitutes a rear end edge 48b of the rectangular opening 48 of the accommodation recess 36 along the left-right direction. In this case, the left and right side edges along the front-rear direction of the rectangular opening 48 of the housing recess 36 are formed by the upper ends of the left and right side plates 35.

  As shown in FIGS. 4 and 5, projecting locking projections 49 to 52 project from the left and right ends of the second plate portion 42 to the fifth plate portion 45 in the recess forming member 37. ing. That is, the locking projection 49 is provided at the end of the second plate 42, the locking projection 50 is provided at the end of the third plate 43, and the locking projection 50 is provided at the end of the fourth plate 44. A locking projection 52 is provided at an end of the fifth plate portion 45.

  On the other hand, as shown in FIG. 6, a plurality of (four in the present embodiment) locking projections 49 to 52 protruding from the left and right ends of the recess forming member 37 are individually provided on the side plate 35. (In this case, four) locking recesses 53 to 56 are formed. The locking recesses 53 to 56 are holes penetrating the side plate 35 in the thickness direction (left and right direction), and the locking projections 49 to 52 projecting from the end of the recess forming member 37 in the left and right direction are positioned. Can be inserted.

  The side plate 35 has a portion corresponding to the first plate portion 41 in the left-right direction when the concave portion forming member 37 is assembled between the left and right side plates 35, and a portion corresponding to the seventh plate portion 47 in the left-right direction. A bent portion 57 having a forward-downward shape that is linearly connected is formed so that a portion closer to the upper front than the bent portion 57 is displaced from the inner surface 34 to the outer surface 39 by the thickness of the plate. Further, a substantially rectangular oblong through hole 58 is formed substantially at the center of the side plate 35. In this through hole 58, a protrusion 59 (see FIG. 4) protruding from the fixing piece 38 for fixing the bucket 26 to the support piece 32 of the endless chain 23 can be inserted in a positioning state.

Next, a method of manufacturing the bucket 26 using the side plate 35, the recess forming member 37, and the fixing piece 38 as described above will be described.
First, in the assembling step, each of the locking projections 49 to 52 projecting from the end of the recess forming member 37 intersects with each of the locking recesses 53 to 56 formed through the side plate 35 with the inner side surface 34 of the side plate 35 ( (Right angle) Then, the concave portion forming member 37 is positioned in the front-rear direction and the vertical direction, which are directions along the inner side surface 34 of the side plate 35. In this regard, the locking recesses 53 to 56 function as locking portions that lock the recess forming member 37 in the positioning state in the direction along the inner side surface 34 of the side plate 35.

  In addition, a protrusion 59 protruding from the fixing piece 38 is inserted into a through hole 58 formed through a substantially central portion of the side plate 35 from a lateral direction crossing (perpendicular to) the outer surface 39 of the side plate 35. Then, the fixing piece 38 is positioned in the front-rear direction and the vertical direction, which are directions along the outer surface 39 of the side plate 35. Before inserting the locking projections 49 to 52 of the recess forming member 37 into the locking recesses 53 to 56 of the side plate 35, insert the projection 59 of the fixing piece 38 into the through hole 58 of the side plate 35. You may.

  In the next welding step, first, by locking the locking projections 49 to 52 with the locking recesses 53 to 56, the end of the concave portion forming member 37 held in a positioning state with respect to the side plate 35 is attached to the side plate 35. Fillet welding is performed on the inner surface 34 of the 35. Similarly, the protrusion 59 is inserted into the through hole 58, and the end of the fixed piece 38, which is in the state of being locked to the side plate 35, on the protrusion 59 side is filled with the outer surface 39 of the side plate 35. Weld. Then, as shown in the center of FIG. 3, the bucket 26 in which the accommodation recess 36 whose one side is open is formed by the cooperation of the pair of left and right side plates 35 and the recess forming member 37.

  The buckets 26 thus manufactured are assembled in series between the pair of left and right endless chains 23 so that the plurality of buckets 26 are adjacent to each other with a partial overlap in the front-rear direction. That is, as shown in FIGS. 2 and 3, the fixing piece 38 on the bucket 26 side is placed on the supporting piece 32 on the endless chain 23 side, and in this state, the fixing piece 38 is fastened to a fastening member such as a bolt and a nut. Is fixed to the support piece 32. Then, when the bucket 26 is horizontally conveyed with the opening 48 of the storage recess 36 facing upward, the third plate portion 43 serving as the bottom wall of the storage recess 36 during the horizontal transport is rotated by the circulation path in the conveyor case 12. The side plate 35 is fixed to the endless chain 23 via the fixing piece 38 and the supporting piece 32 so as to always move on the inner peripheral side of the endless chain.

  As shown in FIG. 7, in this case, each bucket 26 adjacent in the front-rear direction has the upper end of the first plate portion 41, which is a front rising plate portion of the bucket 26, adjacent to the front of the bucket 26. The bucket 26 is supported by the endless chain 23 in a state of being sunk below the fifth plate portion 45 which is a front lowering plate portion. In other words, in this case, each of the buckets 26 adjacent in the front-rear direction sets the upper end of the first plate portion 41, which is the front rising plate portion of the bucket 26, at the fifth position of the other bucket 26 adjacent to the front of the bucket 26. It is supported by the endless chain 23 in a state where it is sunk into the lower region of the sixth plate portion 46 which is the rear lowering plate portion located above the plate portion 45.

  In this case, each bucket 26 adjacent in the front-rear direction is connected to the inner surface of the first plate portion 41 rising forward in the bucket 26 and the outer surface of the fifth plate portion 45 falling forward in the other bucket 26 adjacent to the front. Are set to be larger than 45 degrees. That is, for example, the angle θ6 is set to be larger than the angle (= 45 degrees) at which each bucket 26 is inclined with respect to another adjacent bucket 26 at a bent portion of the endless chain 23 such as in the lower connection case 16. In each bucket 26, a portion of the side plate 35 of the bucket 26, which is closer to the rear and upper than the sixth plate portion 46 of the concave portion forming member 37, is formed in front of the side plate 35 of another bucket 26 adjacent to the rear of the bucket 26. It is assembled to a portion closer to the front upper side than the downwardly bent portion 57 so as to overlap from the inner side surface 34 side.

Therefore, next, the operation of the bucket conveyor 11 and the bucket 26 configured as described above will be described with reference to the drawings as appropriate.
As described above, when the bucket 26 is manufactured, when fillet welding is performed between the side plate 35 and the recess forming member 37, the bucket 26 is provided at the end of the recess forming member 37 with respect to the locking recesses 53 to 56 of the side plate 35. The locking projections 49 to 52 are locked. Then, the concave portion forming member 37 is held in a positioning state in which movement in the front-rear direction and the vertical direction is regulated while forming the housing concave portion 36 having an opening on one surface side in cooperation with the both side plates 35. Therefore, the welding operation can be performed in a stable state without a dedicated jig for holding the side plate 35 and the concave portion forming member 37 in a positioning state.

  In the bucket conveyor 11, each of the buckets 26 supported so as to be adjacent to the endless chain 23 in the front-rear direction is such that the upper end of the first plate portion 41 forming the front end edge 48 a of the opening 48 of the accommodation recess 36 is positioned forward. It is in a state of being sunk into the lower region of the sixth plate portion 46 which is the rear lower plate portion of another adjacent bucket 26. Then, as shown in FIG. 7, the portion of the bucket 26 near the upper end of the first plate portion 41 and the portion of the other bucket 26 adjacent to the front near the lower end of the sixth plate portion 46 are viewed from above in plan view. , A relatively large overlap margin HO is secured between the buckets 26 adjacent in the front-rear direction.

  In this regard, like the bucket of the comparative example shown in FIG. 8, the recess forming member 137 assembled to form the housing recess 136 with the side plate 135 includes the pipe 141 and the plurality of plate portions 142 to 144, 146, 147. , The front edge 148a of the opening 148 of the housing recess 136 is formed as a top on the outer peripheral surface of the pipe 141 having a large occupied space. In this case, the bending of the endless chain 23 is increased by increasing the amount of the pipe 141 squeezed below the lower eaves 146a of the lower plate portion 146 of the other bucket in order to increase the overlap margin. There is a possibility that the pipe 141 may collide with the eaves portion 146a at a location. Therefore, in the case of the comparative example, only the overlap margin JO that is relatively smaller than the overlap margin HO in the present embodiment is secured.

  On the other hand, in the case of the present embodiment, even if the overlap allowance HO is largely secured as described above, the lower part of the sixth plate part 46, which is also the lower part of the fifth plate part 45, is sunk into the sixth part 46. Since the overlap HO is formed by the plate portion 46 and not by the pipe having a large occupied space, but by the first plate portion 41 made of a plate material having a small occupied space, the risk of such collision is reduced. Note that, also in the comparative example, the rear edge 148b of the opening 148 is formed at the front end of the plate portion 147 as in the case of the present embodiment.

  As can be understood from FIGS. 7 and 8, in the case of the present embodiment, the gap HC in the vertical direction existing between the buckets adjacent in the front-rear direction can be reduced, whereas the gap HC in the comparative example can be reduced. In this case, since the space occupied by the pipe 141 is still large, the vertical gap JC cannot be reduced to avoid collision at the bent portion of the endless chain 23. Therefore, in the comparative example, since the overlap allowance JO is small and the gap JC in the vertical direction is large, there is a possibility that the transported object W put into the bucket from above may leak from between adjacent buckets in the front-rear direction. On the other hand, in the present embodiment, since the overlap margin HO is large and the gap HC in the vertical direction is small, such a risk is reduced.

  That is, as shown in FIG. 9, the transferred object W input from above the input port 27 is adjacent to the receiving recess 36 of each bucket 26 conveyed horizontally below the input port 27 in the front-rear direction. The buckets 26 are accommodated without leaking from between the matching buckets 26. Each bucket 26 is horizontally conveyed forward along with the endless chain 23 circling while the third plate portion 43 accommodates the article W in the accommodating recess 36 serving as the bottom wall.

  Next, as shown in FIG. 10, at a bent portion where the transport direction is changed from horizontal transport to vertical transport (specifically, in the lower connection case 16), the link plate 29 and the support piece 32 of the endless chain 23 are provided. Also from the horizontal posture to the vertical posture, the posture of each bucket 26 including the fixing piece 38 fixed to the support piece 32 is similarly changed. In other words, the third plate portion 43 which has constituted the bottom wall up to that time becomes vertical, and the plate portions on the rear end side (specifically, the fourth to sixth plate portions 44 to 46) are located on the bottom wall. Each of the buckets 26 is vertically transported upward along with the orbital movement of the endless chain 23 in a state in which the transported object W is stored in the storage recess 36.

  Then, as shown in FIG. 11, at a bent portion (specifically, in the upper connection case 17) where the transport direction is changed from vertical transport to horizontal transport again, the link plate 29 and the support piece portion of the endless chain 23 are provided. 32 also changes from the vertical posture to the horizontal posture, the posture of each bucket 26 including the fixing piece portion 38 fixed to the support piece portion 32 is similarly changed. Therefore, the third plate portion 43 becomes the bottom wall again in place of the fourth to sixth plate portions 44 to 46 which have constituted the bottom wall of the housing recess 36, and is covered in the housing recess 36. In a state in which the transported object W is stored, each bucket 26 is horizontally transported forward along with the endless chain 23 moving around.

  Then, as shown in FIG. 12, at the reversal point (specifically, the position of the drive side sprocket 18 in the upper case 14) where the transport direction is changed from the horizontal transport forward to the horizontal transport backward, By reversing the posture of each bucket 26 in the up-down direction, the transported object W contained therein is discharged downward from the discharge port 28. Each of the buckets 26 in the non-accommodated state is inverted at the position of the driven sprocket 19 in the lower case 13 as the endless chain 23 moves further around, and then passes again below the inlet 27. The transferred object W input from above the input port 27 is stored again, and thereafter, is similarly conveyed to the output port 28.

According to the above embodiment, the following effects can be obtained.
(1) When the recess forming member 37 is locked in the locking recesses 53 to 56 provided in the side plate 35, the recess forming member 37 is fixed to the side plate 35 using a dedicated jig for positioning and suppressing displacement. On the other hand, the welding operation of the recess forming member 37 to the inner surface 34 of the side plate 35 can be easily performed without holding the positioning state, and the bucket 26 can be easily manufactured.

  (2) Inserting the locking projections 49 to 52, which are a part of the ends of the recess forming member 37, into the locking recesses 53 to 56 of the side plate 35 from the left and right directions, the recess forming member 37 is placed between the side plates 35. In this state, if the end of the concave portion forming member 37 is fillet welded to the inner surface of the side plate 35 in this state, the accommodation concave portion 36 having one surface opened between the side plates 35 can be easily formed.

  (3) Since the plurality of locking projections 49 to 52 are locked by the plurality of locking recesses 53 to 56, the possibility that the recess forming member 37 is displaced in the direction along the inner side surface 34 of the side plate 35 is further increased. Can be suppressed.

  (4) Both ends of the concave portion forming member 37, which is a single U-shaped plate member having a deformed cross section, are formed by a pair of side plates 35 at a portion serving as a bottom wall, a portion serving as a front wall, and a portion serving as a rear wall. By locking the locking recesses 53 to 56 provided as locking portions, the housing recess 36 having one surface opened between the side plates 35 can be easily formed.

  (5) Since the concave portion forming member 37 can be held in the positioning state in the assembling step without the use of a dedicated jig, the welding operation between the side plate 35 and the concave portion forming member 37 can be performed in a stable state in the welding step. .

  (6) Even if the overlap margin HO between the first plate portion 41 rising forward in the bucket 26 and the sixth plate portion 46 falling rearward in another bucket 26 adjacent to the front of the bucket 26 is secured large, The possibility that the rising first plate portion 41 collides with a part of the adjacent bucket 26 at the bent portion of the endless chain 23 can be reduced. Therefore, since the overlap margin HO between the adjacent buckets 26 in the front-rear direction can be largely secured, when the conveyed object W such as a granular material is loaded from above toward the accommodation recess 36 of the adjacent bucket 26, the front-back direction Thus, the possibility that the transferred object leaks from between adjacent buckets 26 can be reduced.

  (7) The angle θ6 (= θ2 + θ4) at which the front-upper first plate portion 41 of the bucket 26 intersects with the front-downward fifth plate portion 45 of another bucket 26 adjacent to the front of the bucket 26 is determined by the bending point of the endless chain 23. By setting the angle larger than the angle (= 45 degrees) at which each bucket 26 is inclined with respect to the other adjacent bucket 26, it is possible to avoid collision at the bent portion.

  (8) In the portion that becomes the rear wall of the housing recess 36, the front lowering fifth plate portion 45 that extends obliquely downward and forward from the lower end of the rear lowering sixth plate portion 46 becomes the bottom wall of the housing recess 36. As compared with the case where the rear end is linearly extended and connected to the rear end, it is possible to secure a larger amount of infiltration into the front of the upper end of the first plate portion 41 rising forward in the other bucket 26 adjacent rearward. Therefore, the overlap HO between the buckets 26 adjacent in the front-rear direction can be increased.

  (9) Even when the transport direction of the bucket 26 is changed from the horizontal direction to the vertically upward direction at the bent portion of the endless chain 23, each bucket 26 is a front lowering plate portion of the rear wall of the bucket 26. The possibility that the fifth plate portion 45 collides with the first plate portion 41, which is the front rising plate portion of the front side wall of the other bucket 26 adjacent behind the fifth plate portion 45, can be reduced.

  (10) Since the concave portion forming member 37 is composed of a bent single plate material, it is not necessary to weld the edges of a plurality of plate members to form the concave portion forming member 37, and the production efficiency of the bucket 26 can be improved. it can.

The above embodiment may be modified as follows.
The fixing piece 38, which is a component of the bucket 26, may not have the protrusion 59. That is, since the fixing piece 38 is smaller and lighter than the recess forming member 37 and the side plate 35, it is possible for a worker to hold the positioning state by hand and perform welding work. Therefore, the fixing piece 38 having no projection 59 may be fillet welded to the side plate 35 having no through hole 58.

  The number of locking concave portions 53 to 56 formed on the side plate 35 and the number of locking convex portions 49 to 52 formed at the end of the concave portion forming member 37 may be plural other than four. Further, if the cross-sectional shape of the engaging concave portion and the engaging convex portion in the fitting relationship is non-circular, the number of the engaging concave portion and the engaging convex portion may be one.

  The locking recesses 53 to 56 are not holes that penetrate the side plate 35, but are cut out in the peripheral edge of the side plate 35 so as to be able to lock the locking protrusions 49 to 52 formed at the end of the recess forming member 37. It may be formed.

  The entire end of the recess forming member 37 having a U-shaped cross section is formed on the inner side surface 34 of the side plate 35 in advance without projecting the locking projections 49 to 52 from the end of the recess forming member 37. It is also possible to adopt a configuration in which it is inserted and locked in a locking recess which is a U-shaped groove.

The locking portion for locking the concave portion forming member 37 to the side plate 35 may be configured by a locking convex portion, and the corresponding locking concave portion may be formed on an end face of the concave portion forming member 37 or the like.
The concave portion forming member 37 does not have a configuration in which a single plate material is bent, but has a substantially U-shaped cross section by welding a plurality of plate materials corresponding to the first plate portion 41 to the seventh plate portion 47. May be formed.

  In the concave portion forming member 37, the front side wall rising from the front end of the portion (for example, the third plate portion 43) serving as the bottom wall during horizontal transfer may be constituted by one plate portion rising forward. That is, the first plate portion 46 and the second plate portion 42 in the present embodiment may be one plate portion linearly extending straight forward from the front end of the third plate portion 43.

  In the buckets 26 adjacent in the front-rear direction, the angle θ4 formed by the outer surface of the fifth plate portion 45 of the front bucket 26 with respect to the horizontal line H and the inner surface of the first plate portion 41 of the rear bucket 26 with the horizontal line H The angle θ2 is preferably angle θ4> angle θ2, but both angles may be the same size.

In the concave portion forming member 37, the fourth plate portion 44 may be omitted, and the lower end, which is also the front end of the fifth plate portion 45, may be directly connected to the rear end of the third plate portion 43 serving as the bottom wall.
In the concave portion forming member 37, the angle θ2 formed by the first plate portion 41 with respect to the horizontal line H is an acute angle smaller than the angle θ4 formed by the fifth plate portion 45 with respect to the horizontal line H. The angle is not limited to this and may be any angle.

  A bucket type transport device, a so-called bucket elevator in which the transport direction is a vertical direction and an inclined direction of 60 degrees or more, a so-called piped bucket conveyor configured to always support the endless chain that circulates around the bucket in a horizontal state, Also, a so-called apron conveyor or a pan conveyor in which the transport direction is a horizontal direction and a gentle inclination direction may be used.

  11 bucket type conveying device, 23 endless chain, 26 bucket, 34 inner surface, 35 side plate, 36 recess, 37 recess portion forming member, 41 first plate portion (one example of a front rising plate portion) Reference numeral 44 denotes a fourth plate portion (an example of a rear connecting plate portion), 45 denotes a fifth plate portion (an example of a front lowering plate portion), 46 denotes a sixth plate portion (an example of a rear lowering plate portion), and 48 denotes an opening. , 48a: front edge, 49 to 52: locking projection, 53 to 56: locking recess (an example of locking portion), H: horizontal line, HO: overlap margin, HC: gap, θ1 to θ5: angle.

Claims (5)

A pair of side plates whose inner surfaces face each other,
A recess forming member that forms an accommodation recess whose one surface side is opened in cooperation with the pair of side plates in a state where the recesses are assembled to the pair of side plates,
The recess forming member is a single plate member integrally having a portion serving as a bottom wall, a portion serving as a front wall, and a portion serving as a rear wall of the housing recess,
In the side plate, each of the end of the portion to be the bottom wall, the end of the portion to be the front wall, and the end of the portion to be the rear wall in the recess forming member is directed along the inner surface of the side plate. A bucket provided with a locking portion for locking in a positioning state.   2. The locking portion according to claim 1, wherein the locking portion is configured by a locking recess that allows at least a part of an end of the recess forming member to be inserted from a direction intersecting with an inner surface of the side plate. 3. Bucket.   The side plate is provided with a plurality of the locking concave portions, and a plurality of locking convex portions individually corresponding to the plurality of the locking concave portions are provided at an end of the concave portion forming member. The bucket according to claim 2. The end of the bottom wall and the end of the front wall of the recessed portion in the recess forming member capable of forming a recessed recessed opening on one side in cooperation with a pair of side plates whose inner side surfaces are opposed to each other An assembling step of assembling each of the end portions of the portion to be the side wall, with respect to the locking portion provided on the pair of side plates, by locking in a positioning state in a direction along the inner side surface of the side plate;
A welding step of welding an end portion of the concave portion forming member held in a positioning state with respect to the side plate by being locked to the locking portion to an inner surface of the side plate. Production method. A bucket according to any one of claims 1 to 3 ,
An endless chain provided to be able to move around while supporting the bucket;
A bucket-type transfer device comprising:

Images