JP5597414B2 - Bucket elevator - Google Patents

Description

  The present invention relates to a bucket elevator for transporting, for example, viscous earth and sand from the underground to the ground.

  Conventionally, a bucket elevator circulates and conveys earth and sand from the ground to the ground by a plurality of buckets provided in a chain stretched between upper and lower sprockets, and one end of the bucket is fixed to the chain. At the lower position, the sand and the like introduced by the earth and sand inlet is received, conveyed upward, and inverted at the upper sprocket to discharge the earth and sand to the outlet, and the bucket descends in the inverted state, at the lower sprocket. By reversing again, it rises toward the sediment inlet, and receives sediment or the like at the inlet (for example, Patent Document 1).

JP 2003-292132 A

  By the way, in the bucket elevator of the above-mentioned Patent Document 1, since objects to be conveyed such as earth and sand are scattered outside the bucket at the time of charging, and objects to be conveyed such as earth and sand are stopped at the bottom of the elevator, when the bucket is reversed in the lower sprocket, There is a problem that it is necessary to rotate while scraping off the stationary earth and sand, and a large load is applied to the bucket and the chain during rotation due to the scraping resistance. Moreover, in the said bucket elevator, the scattered earth and sand etc. adhere easily to a chain etc., Therefore It becomes a cause of malfunctions, such as a malfunction, and there exists a subject that the lifetime of a bucket, a chain, etc. is short as a whole from these problems.

  In addition, the bucket elevator has a problem that the apparatus itself is increased in size because the bucket is moved along the outer periphery of the upper large-diameter sprocket, particularly in the discharge section.

  The present invention has been made in view of the above problems, and by reliably throwing earth and sand into the bucket from the inlet, it prevents scattering of earth and sand to other than the bucket and reduces the load on the bucket, chain, etc. An object of the present invention is to provide a bucket elevator having an improved service life.

  Moreover, an object of this invention is to provide the bucket elevator which implement | achieved size reduction of an apparatus structure.

In order to achieve the above object, the present invention
First, a plurality of buckets are provided at predetermined intervals between a pair of left and right chains stretched between the lower sprocket and the upper sprocket, and the object to be transported that has been thrown into the bucket from the lower inlet is circulated to the upper discharge chute In the bucket elevator to be transferred, the bucket is an upper surface opening bucket, and is suspended from the chain so as to be rotatable with a left and right support shaft on the upper part thereof. the machine frame in the vicinity of the mouth is provided a tilt guide rail guides a range, the bucket when rising along the guide rails guiding the inclination, in a state in which the protrusion comes into contact with the guide rail guide the inclination by moving, the bucket is configured so as to tilt toward the upper opening to the inlet as the pivot axis of the horizontal direction support shaft, the The oblique guide rail guide has a first inclined part that contacts the protrusion and inclines the bucket, and a second inclined part that releases the engagement state of the bucket by releasing the engagement state of the protrusion. The tilt guide rail guide is provided so that the position of the guide rail guide can be adjusted in the front-rear direction or the vertical direction with respect to the machine frame, and the opening is provided in the machine frame facing the front edge of the bucket in the inclined state. The opening can be closed with a guide plate, and the attachment position of the guide plate to the opening can be adjusted in the front-rear direction. clearance provided between the front edge of the bucket of the inclined state to the plate surfaces, the longitudinal direction of the alignment of the guide plate, and characterized in that the adjustably forming the clearance bucket Constituted by the elevators.

  The inclination guide rail guide (15) is a process in which the bucket (8) is transferred by the chain by positioning the guide rail guide on the virtual ascending path (R) of the protrusion (14) of the bucket (8). The protrusion (14) is in contact with the rail guide (15), and is thereby inclined from the horizontal posture toward the insertion port (3) with the left-right support shaft (8b). Can do. Therefore, the object to be conveyed such as earth and sand from the inlet (3) can be reliably introduced into the bucket by the bucket (8), and the scattering of earth and sand to other than the bucket can be prevented as much as possible.

  Accordingly, the protrusion (14) of the bucket (8) is inclined in the direction of the inlet when the protrusion (14) is in contact with the first inclined portion, and the object to be conveyed such as earth and sand is received in the inclined state, and then the protrusion (14). Is shifted to the second inclined portion (15c), and the engagement state between the protrusion (14) and the second inclined portion (15c) is released, so that the inclined state is released. it can. For adjusting the guide rail guide (15) in the front-rear direction or the vertical direction, for example, a bolt (43, 44, etc.) is engaged with a long hole (41a, 45a ', etc.) provided in the rail guide or the machine frame, The rail guide (15) can be configured to be adjustable in the front-rear direction or the up-down direction within the range of the length of the long hole or the bolt. Therefore, by adjusting the position of the rail guide (15) with respect to the machine frame, the inclination angle of the bucket (8) or the inclination timing of the bucket (8) is adjusted, and the conveyed object such as earth and sand under the optimum conditions. Can be put into a bucket.

  Adjustment of the mounting position of the opening (50) of the guide plate (49) can be performed, for example, by inserting a shim plate (52) having a predetermined thickness between the guide plate and the mounting position of the machine frame. it can. If comprised in this way, according to the inclination-angle of a bucket (8), the clearance (T) of a guide plate (49) and a bucket front-end edge (51) can be set optimally, and, thereby, it goes out of a bucket. Leakage and scattering of transported objects such as earth and sand can be minimized.

Second, between the inclined guiding rail guides of the first inclined portion and the second inclined portion, the third inclined portion for tilting the further inlet direction the bucket by the projection abuts And a bucket elevator according to the first aspect, wherein a fourth inclined portion for releasing the inclination is provided.

  Therefore, for example, the protrusion (14) of the bucket (8) abuts on the third inclined portion (53a) at a position close to the charging port (3), thereby increasing the inclination angle of the bucket (8). Thus, the object to be transported such as earth and sand can be more reliably thrown into the bucket, and by increasing the inclination angle of the bucket (8), the front side surface (8e) on the inlet side of the bucket Since the inclination angle becomes larger, it is possible to prevent adhesion of earth and sand to the bucket front side surface.

Third , along the pair of chains, a rubber cover is provided at the opposite part of both chains, a slit is formed in the center of the cover, and the left and right support shafts of the bucket are interposed through the slits. The bucket elevator according to the first or second aspect is configured to be connected to the chain.

  If comprised in this way, the burden of a chain | strand can be reduced and the lifetime of a bucket elevator can be improved by preventing scattering of conveyed objects, such as earth and sand, to the chain.

Fourth, in a predetermined range near the inlet, the first through 3, wherein the is provided with a pair of left and right shatterproof plate between the left and right side surfaces and said pair of chain of the bucket It is comprised by the bucket elevator in any one.

  If comprised in this way, especially in the predetermined range of the vicinity of the inlet with much scattering of to-be-conveyed objects, such as earth and sand, a scattering prevention board can prevent reliably scattering of earth and sand in the chain direction.

Fifth , the upper sprocket is composed of a pair of opposed sprockets, the rotation center axes of these upper sprockets are provided only on the outer sides, and the bucket passes through the opposed inner sides of both upper sprockets. The bucket elevator according to any one of the first to fourth aspects is provided.

  If comprised in this way, since the bucket (8) can pass the inner side which an upper sprocket (6a, 6b) opposes, the diameter of an upper sprocket can be made small and the apparatus structure of the upper sprocket vicinity of a bucket elevator Can be miniaturized.

Sixth , it is constituted by the bucket elevator according to any one of the first to fifth aspects, wherein one end of an arm is connected to the lower sprocket, and a weight is provided at the other end of the arm. The

  If comprised in this way, an appropriate tension can always be made to act on the said chain.

  In the present invention, as described above, by tilting the bucket in the vicinity of the inlet, it is possible to reliably feed the object to be transported such as earth and sand into the bucket, and to prevent scattering of earth and sand. Since an unnecessary load is not applied to the chain or the like, it is possible to realize a bucket elevator having a significantly improved service life.

Also, by adjusting the bucket tilt angle or tilt timing, it is possible to reliably put the transported object into the bucket under the optimum conditions according to the type and properties of the transported object such as earth and sand. It is possible to reduce the load on the bucket or chain in the bucket and to improve the service life of the bucket elevator.
By adjusting the position of the rail guide (15) with respect to the machine frame, the inclination angle of the bucket (8) or the inclination timing of the bucket (8) is adjusted, and the object to be transported such as earth and sand is bucketed under optimum conditions. Can be put in.
According to the inclination angle of the bucket (8), the clearance (T) between the guide plate (49) and the bucket front end edge (51) can be set optimally, and thus the conveyed object such as earth and sand outside the bucket. Leakage and scattering can be minimized.

  In addition, the rubber cover and anti-scattering plate are used to prevent the transfer of objects to be transported such as earth and sand to the chain as much as possible, thereby improving the service life.

  Moreover, the diameter of an upper sprocket can be comprised small and a bucket elevator with high space efficiency can be comprised.

It is a side view of the bucket elevator which concerns on this invention. It is a front view of a bucket elevator same as the above. It is a side view of the lowermost vicinity of a bucket elevator same as the above. It is a side view of the entrance vicinity of the bucket elevator same as the above. It is a side view of the discharge part of a bucket elevator same as the above. It is a side view of the upper part sprocket vicinity of a bucket elevator same as the above. It is a side view of the upper part sprocket vicinity of a bucket elevator same as the above. It is a top view of the upper sprocket vicinity of a bucket elevator same as the above. (A) (b) is a perspective view of the bucket of a bucket elevator same as the above. It is a front view of the vicinity of the inlet of the bucket elevator. It is a disassembled perspective view of the guide rail guide vicinity of the inclination of the guide cylinder of a bucket elevator same as the above. It is a perspective view of the guide rail guide vicinity for inclination of the guide cylinder of a bucket elevator same as the above. It is a perspective view which shows the attachment state of the guide rail guide for inclination of a bucket elevator same as the above. (A) is a figure which shows the clearance of the inclination bucket of a bucket elevator same as the above, and a guide plate, (b) is a figure which shows the inclination angle of the bucket of a bucket elevator same as the above. (A) (b) is a side view which shows the adjustment state of the guide plate of a bucket elevator same as the above. It is a side view of the entrance vicinity of the bucket elevator same as the above. It is a side view of the entrance vicinity of the bucket elevator same as the above. It is a perspective view of the bucket of a bucket elevator same as the above. It is a cross-sectional view of the vicinity of the cover of the bucket elevator. It is a perspective view of the state which removed the bucket which shows the relationship between the left-right direction support shaft and cover of a bucket elevator same as the above. It is a perspective view of the guide rail guide vicinity for inclination of a bucket elevator same as the above. It is the perspective view of the state which removed the side surface of the bucket in FIG. It is a perspective view of the guide plate vicinity which shows the relationship between the guide plate and bucket in a bucket elevator same as the above.

  Hereinafter, the bucket elevator according to the present invention will be described in detail.

  1 and 2 show the overall configuration of a bucket elevator 1 according to the present invention. This bucket elevator 1 is constructed such that a discharge portion 1a including a discharge chute 9 is erected on the ground G by support columns 2 and 2, and a bucket guide cylinder 1b is vertically embedded in the ground, with the lowest point (about 30 m in the ground) ) An insertion port 3 for earth and sand is provided in the vicinity, and the earth and sand introduced by the input conveyor 4 from the input port 3 into the bucket guide cylinder 1b is received by the bucket 8 and conveyed to the upper discharge chute 9. . The machine frame of the guide tube 1b is referred to as a machine frame 45.

  The bucket elevator 1 suspends a plurality of buckets 8 at a predetermined interval between a pair of left and right chains 7a, 7b stretched between a lower sprocket 5 and upper sprockets 6a, 6b. The earth and sand thrown in is circulated and transferred to the upper discharge chute 9.

  In the following description, the up and down direction of the bucket 8 in FIG. 1 is referred to as “vertical direction”, the front and rear in the side view of FIG. 1 are referred to as “front and rear direction”, and the left and right in the front view of FIG.

  As shown in FIGS. 9A and 9B, the bucket 8 is an upper surface opening bucket (upper surface opening 8a), and a left and right support shaft 8b located on the same central axis in the left and right direction of the upper portion. , 8b are connected to the chains 7a, 7b via both ends, and the bucket 8 is rotatable in the directions of arrows A, B around the support shaft 8b. Since these support shafts 8b are provided at the center in the front-rear direction of the bucket 8, in the suspended state, the bucket 8 is in a horizontal state in which the lower surface opening is directed vertically downward and the front-rear weight is suspended, and the bucket 8 is inclined. It is supported without hanging. In this way, the bucket 8 is suspended from the chains 7a, 7b in a horizontal state by supporting both ends of the left-right support shaft 8b on the left and right chains 7a, 7b.

  The bucket 8 closes its lower opening front half 8 ′ and is pivotally supported by the bucket side surfaces 8c and 8c (support shafts 10a and 10a), and is rotated forward (in the direction of arrow A). The front half turn bottom 11a that can open the opening front half 8 ′ and the bottom opening rear half 8 ″ thereof are closed and pivotally supported by the bucket side surface (support shafts 10b and 10b) and rearward (in the direction of arrow B). It has a lower half rotation bottom portion 11b that can open the lower half portion 8 ″ of the lower surface opening by turning.

  As shown in FIG. 9 (b), the front half-rotating bottom portion 11a is supported on the left and right support shafts 10a and 10a by the respective apex portions of the fan-shaped side plates 11 ′ and 11 ′. A plurality of rotating rollers 12 are rotatably supported between the arc-shaped lower edges of 11 ′ and 11 ′ (see FIG. 18). These rollers 12 are arranged close to each other in the front-rear direction, and each roller 12 can freely rotate.

  As shown in FIG. 9 (b), the latter half rotation bottom portion 11b is pivotally supported on the left and right support shafts 10b, 10b by the respective apex portions of the fan-shaped side plates 11 ″, 11 ″. A plurality of rotating rollers 12 are rotatably supported between the arc-shaped lower edges of 11 ″ and 11 ″ (see FIG. 18). Similarly, these rollers 12 are arranged close to each other in the front-rear direction, and each roller 12 is freely rotatable.

  Further, rubber plates 13a and 13b are respectively laid on the upper surfaces of the rollers 12 of the first half bottom portion 11a and the second half bottom portion 11b (see FIG. 18), and the central edge 13a of each rubber plate 13a and 13b. ', 13b' are joined, and the outer edge 13a "of the rubber plate 13a of the front half rotation bottom portion 11a is connected and fixed to the front opening edge 8d of the lower surface of the bucket 8 with a plurality of bolts b or the like. The outer edge 13b ″ of the rubber plate 13b of the moving bottom 11b is connected and fixed to the rear surface opening rear end edge 8d ′ of the bucket 8 with a plurality of bolts b or the like.

  A protrusion 14 is fixed to a position below the side plate (side surface) 11 ′ of the front half rotation bottom portion 11a, and a pair of left and right tilt guide rail guides 15 are provided in the vicinity of the conveyed object insertion port 3 (see FIG. 4, 11, and 21), when the bucket 8 moves up along the guide rail guide 15, the protrusion 14 moves while being in contact with the rail guide 15, thereby rotating the front / rear half. The entire bucket 8 can be inclined with its upper surface opening 8a toward the charging port 3 while the bottom portions 11a and 11b are closed. The protrusion 14 is provided at a symmetrical position of the left and right side plates 11 ′, and a roller 14 a is rotatably provided around the protrusion 14.

  The support shafts 10 a and 10 b of the front half rotation bottom portion 11 a and the latter half rotation bottom portion 11 b are connected by a link mechanism 16. The link mechanism 16 (see FIGS. 4, 9, and 18) is connected to the support shaft 10a, extends obliquely upward, and is connected to the support shaft 10b and an arm portion 16a welded to the first half rotation bottom portion 11a. The arm portion 16c extends obliquely downward and is welded to the second-half rotation bottom portion 11b, and the link plate 16b that is pivotally supported by the end portions of the arm portions 16a and 16c and connects the arm portions. ing. The link mechanism 16 is also provided as a pair on the left and right support shafts 10a and 10b (see FIG. 10).

  With such a structure of the link mechanism 16, the protrusion 14 provided on the side plate of the front half turn bottom portion 11 a is moved in the direction of arrow C (from the closed state of the front half turn bottom portions 11 a and 11 b (states of FIGS. 9 and 4)) When pressed against (see FIG. 4), the support shaft 10a (the first half rotation bottom portion 11a) tries to rotate in the direction of arrow B, but the force is transmitted to the other support shaft 10b (through the link mechanisms 16a, 16b, 16c). The latter half rotation bottom portion 11b) is going to rotate in the direction of arrow A. However, the force to rotate the support shaft 10b in the direction of the arrow A is offset by the force pressing the support shaft 10a (the front half rotation bottom portion 11a) in the direction of the arrow B, so that the bottom portions 11a and 11b are closed. Maintain state. Further, when a pressing force in the direction of arrow C acts on the protrusion 14, the entire bucket 8 rotates in the direction of arrow B around the support shaft 8 b so that the upper surface opening 8 a is directed in the direction of the inlet 3. It is configured (see FIG. 4).

  Thus, when the bucket 8 moves up along the guide rail guide 15, the protrusion 14 moves in a state of being in contact with the rail guide 15, thereby opening and closing the bottom portion (front and rear half) of the lower surface. The entire bucket is configured to be able to incline the upper surface opening 8a toward the charging port 3 while the bottoms 11a and 11b) are closed (see FIGS. 21 and 22). In addition, when the bucket 8 is not a bottom opening / closing type (when the bucket is inverted to discharge earth and sand), the protrusion 14 may be provided independently on the left and right side surfaces 8c, 8c of the bucket 8, Even the bottom opening / closing type may be provided on the side surfaces 8c, 8c independently of the bottom opening / closing projection.

  The inclination guide rail guide 15 (FIGS. 4, 11, and 17) includes a lower inclined portion (first inclined portion) 15a composed of a downward inclined portion inclined from the insertion port 3 side (front side) to the rear side. The straight portion 15b formed following the inclined portion 15a and parallel to the chains 7a and 7b, and the upward inclined portion formed following the straight portion 15b and inclined from the rear side to the inlet 3 side (front side). It is comprised from the upper inclination part (2nd inclination part) 15c comprised from (the inclination part of the reverse direction to the said lower inclination part 15a). The rail guide 15 has a straight portion 15b on the rear side of the virtual rising path R (FIG. 4) of the projection 14 when it is assumed that the guide rail guide 15 is not provided, and the chains 7a and 7b. And the positions of the lower inclined portion 15a and the upper inclined portion 15c are located on the virtual ascent path R of the protrusion 14 of the bucket 8 rising from below, and The straight portion 15b is fixed to the machine frame 45 in the vicinity of the position below the insertion port 3 so that the straight portion 15b is parallel to the chains 7a and 7b. The position adjusting structure of the rail guide 15 will be described later with reference to FIG.

  By installing the guide rail guide 15 in this way, the bucket 8 that has swung the lower sprocket 5 rises along the chains 7 a and 7 b, but near the outlet of the lower sprocket 5, the protrusion 14 Comes in contact with the lower inclined portion 15a on the virtual ascending path R and rises in the contact state, so that the projection 14 obtains a pressing force in the direction of arrow C from the lower inclined portion 15a, thereby The bucket 8 gradually inclines rearward (in the direction of arrow B) around the left and right support shaft 8b while the protrusion 14 rises along the lower inclined portion 15a, and the protrusion 14 After shifting to the straight portion 15b, the straight portion 15b rises along the straight portion 15b while maintaining the inclined posture.

  At this time, since the upper surface opening 8a of the bucket 8 faces toward the charging port 3, the earth and sand and the like charged from the charging port 3 can be reliably received.

  After receiving the earth and sand, the bucket 8 rises along the straight portion 15b, the protrusion 14 moves from the straight portion 15b to the upper inclined portion 15c, and the protrusion 14 is inclined in the reverse direction. By moving along the upper inclined portion 15c, the upper inclined portion 15c gradually moves away from the virtual ascending path of the protrusion 14, and therefore the inclination of the bucket 8 causes the protrusion 14 to follow the upper inclined portion 15c. The bucket 8 is gradually released in the process of moving, and the bucket 8 returns to the horizontal posture suspended by the chains 7a and 7b when the projection 14 is disengaged from the upper inclined portion 15c. Ascending while keeping.

  As described above, the guide rail guide 15 includes the lower inclined portion 15a for inclining the bucket 8, the linear portion 15b for maintaining the inclined state of the bucket, and the upper inclined for releasing the inclined state. The portion 15c (inclined in the opposite direction with respect to the upper inclined portion 15a) is configured so that the entire inclined portion has an arc shape, a curved shape, or a triangular shape without a straight portion, and the bucket is changed from an inclined state to a horizontal state without an inclination. You may comprise so that it may transfer continuously. Therefore, the upper and lower inclined portions are a concept including an arc-shaped inclined portion.

  Thus, the guide rail guide 15 is provided over the range of approximately two buckets from the vicinity of the insertion port 3 to the lower end direction (see FIG. 4). A lower inclined portion (first inclined portion) 15a for pressing in the direction of (arrow C direction), a linear portion 15b provided along the chains 7a and 7b, continuous to the lower inclined portion 15a, and the bucket It is comprised from the upper inclination part (2nd inclination part) 15c for returning to the suspended state which does not incline.

  Further, when a force is applied to the projection 14 in the direction of arrow D (see FIG. 6), the link mechanism 16 applies a force that rotates the support shaft 10a in the direction of arrow A, and the rotational force is applied to the arm portion 16a. The support plate 10b is rotated in the direction of arrow B through the link plate 16b and the arm portion 16c. Accordingly, in this case, the first half rotation bottom portion 11a is rotated in the direction of arrow A to be in an open state (see FIG. 6), and the second half rotation bottom portion 11b is also rotated in the direction of arrow B to be in an open state. The latter half rotation bottom portions 11a and 11b are completely opened (see FIGS. 6 and 7). At the same time, the rubber plates 13a and 13b hang down and the bottom is completely opened.

  A horizontal opening / closing guide rail guide 20 of a certain range (approximately two buckets) is provided near (above) the discharge chute 9 of the bucket 8, and the bucket 8 extends along the opening / closing guide rail guide 20. When moving, the projection 14 abuts against the guide rail guide 20 to receive the opening pressing force (in the direction of arrow D), thereby opening the front half bottom 11a and the bottom half bottom 11b to be transported. An object (earth and sand) is configured to drop onto the discharge chute 9.

  A lifting prevention protrusion 31 is provided on the rear upper surface of the side surface 8c of the bucket 8, and a rotating roller 31a is provided at the tip of the protrusion 31 (see FIGS. 9 and 18). As shown in FIGS. 6 and 7, when the bucket 8 shifts to the horizontal movement above the discharge chute 9, the rotation roller 31a is provided in a horizontal direction in parallel with the chain 7a that shifts horizontally. It is configured to move on a rail guide (third guide rail guide) 32. With this configuration, when a force in the direction of arrow D acts on the protrusion 14, a force for rotating in the direction of arrow A about the left and right support shaft 8 b acts on the bucket 8 itself. Is pressed against the upper surface of the guide rail guide 32 to prevent the bucket 8 itself from floating (rotation in the direction of arrow A).

  The opening / closing guide rail guide 20 is provided as a pair on the left and right between the upper sprockets 6a and 6b, and applies a pressing force in the direction of arrow D to the protrusion 14 to open the front and rear bottom portions 11a and 11b. The first half inclined portion 20a, the straight portion 20b for maintaining the open state, and the second half inclined portion 20c for releasing the pressing force in the direction of the arrow A are configured.

  In this way, the support shafts 10a and 10b of the first half bottom portion 11a and the second half bottom portion 11b are connected by the link mechanism 16, and the projection 14 is opened in the direction in which the one pivot bottom portion 11a is opened. Only when pressure (in the direction of arrow D) is applied, it is configured to rotate in the direction of opening the other rotating bottom 11b via the link mechanism 16, and is constant in the vicinity of the discharge chute 9 of the bucket 8. An opening / closing guide rail guide 20 is provided, and when the bucket 8 moves along the opening / closing guide rail guide 20, the protrusion 14 contacts the guide rail guide 20 to receive the opening pressing force. As a result, the first half rotation bottom portion 11a and the second half rotation bottom portion 11b are opened, and the object to be transported (earth and sand) is dropped onto the discharge chute 9.

  A discharge conveyor 9a is provided at the lower end of the discharge chute 9 (FIGS. 1 and 2), and the discharged earth and sand are conveyed to a predetermined place by the conveyor 9a. Moreover, according to such a configuration of the discharge chute 9, as shown by a two-dot chain line in FIG. 2, by tilting the direction of the discharge chute 9 to the left or right, the discharge chute 9a has a discharge port. The position can be easily shifted to the left or right, and the installation position of the carry-out conveyor 9a can be set according to the installation location or the transport location such as earth and sand.

  As shown in FIG. 8, the upper sprockets 6a and 6b are composed of a pair of opposed sprockets 6a, 6a, 6b and 6b, and the rotation center shafts 21a and 21b of the sprockets 6a and 6b are in the outer direction of each sprocket. The bucket 8 is configured so as to pass through the opposed inner sides 6a 'and 6b' of both the sprockets 6a and 6b. That is, the rotary shafts 21a and 21b of the sprockets 6a and 6b are formed to extend outward from the sprockets 6a and 6b, respectively, and the rotary shafts 21a and 21b are respectively connected to the upper machine casing 35 of the bucket elevator. It is rotatably supported by bearings (pillow blocks) 22 and 23 provided on the top. Therefore, there is no central axis that connects the sprockets 6a and 6a and the sprockets 6b and 6b.

  The chains 7a and 7b are wound around the sprockets 6a and 6b. Since the bucket 8 is suspended between the chains 7a and 7b, the bucket 8 is placed on the upper surface of the discharge chute 9 via the sprocket 6a. Change direction horizontally. At this time, as shown in FIG. 6, the bucket 8 passes through the position of the central shaft 21a between the two sprockets 6a, 6a, but there is no central shaft that connects the two sprockets 6a, 6a, so there is no problem. Can pass through. With this configuration, the sprocket 6a can be formed with a very small diameter, and the device configuration in the vicinity of the discharge chute 9 can be reduced in size. This function is the same on the upper sprockets 6b and 6b.

  The sprockets 6b and 6b are connected to the rotating shafts 21b and 21b with drive chains 30 and 30 connected to the drive pulleys of the independent motors M1 and M2, respectively, to drive the motors M1 and M2 in a synchronized state. Thus, the sprockets 6b and 6b are rotationally driven at the same timing, whereby the chains 7a and 7b can be rotationally driven in the direction of arrow E (FIG. 1).

  The pair of chains 7a and 7b are provided along the elevating rail guide 24 (see FIG. 9A and FIG. 20), but the rubber guide 24 is opposed to both the chains 7a and 7b. The cover 25, 25 is provided, the opposed edges of the cover 25, 25 are made close to each other, and a slit 26 is formed in the center. The left and right support shaft 8b of the bucket 8 is connected to the chain 7a via the slit 26. , 7b.

That is, as shown in FIGS. 9A and 20, the left-right support shaft 8 b of the bucket 8 is connected to the chains 7 a and 7 b through the slit 26 of the rubber cover 25. With this configuration, the slit 26 of the cover 25 is normally closed in a close state at all times due to the elasticity of the rubber, so that earth and sand are not directly scattered and attached to the chains 7a and 7b. Can be effectively prevented.
As shown in FIG. 19, the rail guide 24 is provided on both sides of the chain 7b (7a), and both edge portions of the parallel surfaces 24a and 24a with respect to the bucket side surface 8c on both sides of the chain 7b Are provided with inclined support surfaces 24b, 24b which are bent at the same angle in the direction away from the bucket 8 and are inclined toward the central axis of the left-right support shaft 8b. Each of the covers 25, 25 is fixed to the inclined support surfaces 24b, 24b by bolts at each edge. Accordingly, the covers 25, 25 are fixed in an inclined state so that each other edge protrudes in the direction of the central axis of the left-right support shaft 8b from both edges. A slit 26 is formed by the proximity of the other edges. As described above, the covers 25, 25 are attached in a state where a mountain-shaped inclined surface is formed so that the slit 26 protrudes in the bucket 8 direction from the inclined support surfaces 24b, 24b. It is possible to prevent the cover from being caught inside the covers 25 and 25 (in the direction of the chains 7a and 7b) with the passage of 8b, and to more effectively prevent the sand and the like from being scattered into the chains 7a and 7b. Can do.

  27 is a suspension for maintaining the tension of the chains 7a and 7b (FIG. 1), and is provided on the lower sprocket 5 via an arm 28. The chain 7a, It is provided to always apply tension to 7b.

  A pair of left and right anti-scattering plates 29, 29 are fixed between the chains 7a, 7b and the bucket 8 in the range where the tilting guide rail guide 15 is formed in the charging port 3 (see FIG. 4, FIG. 10). The scattering prevention plates 29 and 29 guide earth and sand (X in FIGS. 4 and 10) introduced from the insertion port 3 by the carry-in conveyor 4 in the direction of the upper surface opening 8 a of the bucket 8. The left and right are provided with scattering prevention portions 29a and 29a having a large area, and hanging portions 29b and 29b are provided downward from the scattering prevention portions 29a and 29a. The prevention plates 29 and 29 guide the earth and sand introduced from the inlet 3 toward the bucket 8 to the upper surface opening 8a of the bucket 8 and prevent scattering. In the figure, reference numeral 36 denotes a sprocket of the input conveyor 4.

  Since the present invention is configured as described above, the bucket 8 moves in a suspended state in which the upper center is supported by the chains 7a and 7b by the left and right support shafts 8b, and moves around the lower sprocket 5 to the insertion port 3. It reaches. At this time, the protrusion 14 of the front half rotation bottom portion 11a abuts on the lower inclined portion 15a of the guide rail guide 15 for inclination, whereby the entire bucket 8 is rotated rearward around the left and right support shaft 8b, Shifting to the portion 15b, the section of the straight portion 15b and the upper surface opening 8a rises vertically in an inclined state toward the insertion port 3 (see FIG. 4).

  At this time, earth and sand are introduced from the inlet 3, but since the upper surface opening 8 a faces the inlet 3, the introduced earth and sand is surely introduced into the bucket 8 and suppresses sediment spillage. can do.

  The bucket 8 returns to a suspended state without a tilt (horizontal suspended state) by passing through the upper inclined portion 15c of the guide rail guide 15 for tilting, and rises in the suspended state.

  The bucket 8 loaded with earth and sand is horizontally changed in direction by the upper sprocket 6a, and the protrusion 14 comes into contact with the front half inclined portion 20a of the guide rail guide 20 for opening and closing. As a result, the first half rotation bottom portion 11a opens in the direction of arrow A, and at the same time, the second half rotation bottom portion 11b opens in the direction of arrow B via the link mechanism 16. At this time, the rubber plates 13a and 13b are simultaneously suspended downward, and the earth and sand stored therein are dropped onto the discharge chute 9.

  At this time, since the bottom portion of the bucket 8 is completely opened, even the highly sticky earth and sand can be surely dropped.

  When the bucket 8 is positioned at the rear half inclined portion 20c (FIG. 7), the pressure against the protrusion 14 is released, and thus the front and rear half turn bottom portions 11a and 11b turn in the closing direction. At this time, the rollers 12 of the first and second rotation bottom portions 11a and 11b come into contact with the back surfaces of the rubber plates 13a and 13b, and the rollers 12 close while rotating, so that the rubber plates 13a and 13b are smoothly closed. can do.

  The bucket 8 from which earth and sand have been discharged moves downward through the upper sprocket 6b, and thereafter the above operation is repeated.

  As described above, according to the present invention, the object to be transported such as earth and sand can be reliably put into the bucket 8 by inclining the bucket 8 that is always moving in a horizontal posture, such as scattering of earth and sand. Since an unnecessary load is not applied to the bucket 8, the service life as a bucket elevator can be significantly improved.

  Further, since the upper surface opening of the bucket is inclined in the direction of the charging port when the bucket 8 passes through the charging port, it is possible to reliably load the object to be transported such as earth and sand into the bucket.

  Further, since the bucket has a configuration in which the upper center is shifted in a suspended state balanced in the front-rear direction to the left-right support shaft 8b, and is configured to prevent scattering of earth and sand, etc., when moving the lower sprocket, the bucket 8. Unnecessary load does not act on the chains 7a and 7b, sprockets, etc., thereby improving the service life of the bucket elevator. In addition, since unnecessary loads as described above do not act, the motors M1 and M2 can be reduced in size and power consumption can be reduced, and the chains 7a and 7b, the discharge portion 1a, and the casing of the bucket guide cylinder 1b can be simplified and reduced in size. The cost can be reduced as a whole.

  Further, since the object to be conveyed can be discharged by completely opening and closing the bottom portion of the bucket 8, even a highly viscous object to be conveyed can be reliably discharged.

  Moreover, the diameter of upper sprocket 6a, 6b can be comprised small, and a bucket elevator with high space efficiency can be comprised.

  In addition, by providing a rubber cover on the chain, it is possible to prevent scattering and adhesion of earth and sand to the chain as much as possible, and to prevent failure of the chain, sprocket, etc. based on adhesion of earth and sand as much as possible. it can.

  FIG. 11 to FIG. 13 show the detailed configuration of the tilting guide rail guide 15. As shown in the figure, these guide rail guides 15 are constituted by elongated plate-like rails having the lower inclined portion (first inclined portion) 15a, the straight portion 15b, and the upper inclined portion (second inclined portion) 15c. In addition, attachment portions 40 and 40 for adjusting the vertical position in the vertical direction are formed at two locations on the linear back surface portion 15d of the linear portion 15b. The structure of the left and right rail guides 15 and 15 is symmetrical, and the structure of each mounting portion 40 is also symmetrical.

  These mounting portions 40 are composed of a channel 41 projecting forward and a channel 42 provided in the vertical direction along the back surface portion 15d, and a long hole 41a in the front-rear direction is formed on the upper surface of the channel 41. The height adjusting bolt 43 is engaged with the elongated hole 41a in an upright state by upper and lower nuts N, N (see FIG. 13). A long hole 41b in the front-rear direction is formed on the side surface of the channel 41, and a fixing bolt 55 is engaged with the long hole 41b.

  Above the channel 42, a bolt 44 for position adjustment in the front-rear direction is fixed in a forward direction parallel to the protruding direction of the channel 41.

  In the machine frame 45 on the front side of the bucket guide cylinder 1b, the left and right tilt guide rail guides 15 and 15 are attached to a horizontal attachment plate 45a in the left and right direction, respectively, so that they correspond respectively to the attachment portions 40 (four places). Fixed portions 46 (four locations) are provided (see FIG. 13). The upper fixing portions 46 and 46 and the lower fixing portions 46 and 46 have a symmetrical structure.

  These fixing portions 46 are provided with an opening 47 in the vertical direction in the mounting plate 45a, and are formed with standing pieces 48a and 48b protruding forward on the lower side and upper side of the opening 47, and bolts on the upper standing piece 48b. Through-hole 48b '. Further, a vertical hole 45a 'for adjusting the height is formed through the mounting plate 45a which is vertically continuous from the upper standing piece 48b in the mounting plate 45a. In addition, a vertical plate 56 that connects the upright pieces 48a and 48b inward is provided with an elongated hole 56a in the vertical direction (FIG. 12).

  Therefore, the left and right guide rail guides 15 and 15 are attached to the left and right positions of the machine casing 45 by placing the respective channels 41 of the guide rail guide 15 on the respective upstanding pieces 48a on the lower side. The tip of the bolt 44 is inserted into the elongated hole 45a ′. Then, the height adjusting bolt 43 is inserted into the long hole 41a of the channel 41 from the through hole 48b ′ of the upper standing piece 48b, and the bolt 43 is fixed to the channel 41 with upper and lower nuts N, N. The fixing bolt 55 is inserted into the long hole 56a of the vertical plate 56 through the long hole 41b and fixed with a nut or the like, and the front and rear nuts N and N are screwed to the bolt 44 to By fixing 44 to the mounting plate 45 a, the tilting guide rail guide 15 can be fixed to the machine casing 45.

  Here, when adjusting the position of the guide rail guide 15 for inclination in the front-rear direction, the nuts N and the bolts 55 are loosened so that the rail guide 15 is in a free state in the front-rear direction, and the front and rear sides on both sides of the mounting plate 45a. The nuts N and N are rotated in a predetermined direction. For example, when the rail guide 15 is moved forward, the rail guide 15 is moved forward by tightening the nut N on the front side of the mounting plate 45a in the right direction, for example, and the rail guide 15 is moved backward. The rail guide 15 can be moved rearward by tightening the nut N on the rear side of the mounting plate 45a in the reverse direction. When the rail guide 15 is fixed, the nuts N on both sides of the mounting plate 45a and the channel 41 are tightened, and the bolts 55 are tightened with locking prevention. If comprised in this way, the inclination-angle of the bucket 8 at the time of passing the said guide rail guide 15 can be adjusted. That is, when the rail guide 15 is moved rearward, the guide 15 is moved rearward with respect to the chains 7a and 7b, and the protrusion 14 of the bucket is further moved to the rail guide 15 (straight portion 15b) on the rear side. Since it abuts, the inclination angle of the bucket can be further increased (see FIG. 14A). Conversely, when the rail guide 15 is moved forward, the rail guide 15 is moved forward with respect to the chains 7a and 7b, and the protrusion 14 is further moved forward to the rail guide 15 (straight portion 15b). Since it abuts, the inclination angle of the bucket 8 can be further reduced (see FIG. 14A).

  In this way, by adjusting the inclination guide rail guide 15 in the front-rear direction, the inclination angle of the bucket 8 can be adjusted within a range of, for example, 0 ° to 30 ° (see FIG. 14B). The bucket inclination angle can be made optimal in accordance with the properties of the earth and sand to be put in, the earth and sand input angle, and the like.

  Further, when the guide rail guide 15 is adjusted in the vertical direction, the nuts N and the fixing bolts 55 are loosened in FIG. 13 so that the nuts N and N on both sides of the channel 41 are in a predetermined direction. Rotate. For example, when the rail guide 15 is moved upward, the rail guide 15 is moved upward by tightening the nut N on the upper side of the channel 41, for example, in the right direction, and when the rail guide 15 is moved downward, The rail guide 15 can be moved downward by tightening the nut N on the lower side of the channel 41 in the reverse direction. When the rail guide 15 is fixed, the nuts N, N on both sides of the channel 41 and the mounting plate 45a are tightened, and the bolt 55 is tightened with a loosening prevention. If comprised in this way, the inclination start timing of the said bucket 8 and the completion | finish timing of inclination can be adjusted, and the optimal inclination timing can be set according to the position of the insertion port 3, or the property of the earth and sand thrown in. it can. Further, the front / rear and up / down adjustment of the guide rail guide 15 can be performed by simply rotating the nut N from the outside of the machine with one spanner.

  The adjustment mechanism of the guide rail guide 15 in the front / rear / up / down direction may be either one such as an adjustment mechanism only in the front / rear direction or an adjustment mechanism only in the upper / lower direction. It is preferable to provide it.

  A rectangular opening 50 is formed in the front side of the guide tube 1b corresponding to the position where the guide rail guide 15 is attached, more specifically, in the machine frame 45 between the upper, lower, left and right fixed portions 46. A guide plate 49 that can close the opening 50 from the front side is provided (see FIG. 11).

  The guide plate 49 is composed of a plate surface 49a capable of closing the opening 50 and a mounting peripheral plate 49b provided on the periphery thereof, and the opening 50 is closed from the front by the plate surface 49a. In this state, the mounting peripheral plate 49b comes into contact with the opening peripheral edge 50a of the machine frame 45, so that the opening peripheral edge 50a and the mounting peripheral plate 49b are fastened with bolts and nuts BN. (See FIGS. 12 and 23). In such an attachment state, a clearance T (for example, T1, T2, etc. in FIG. 14A) between the plate surface 49a of the guide plate 49 and the front end edge 51 of the front side surface 8e of the bucket 8 is determined. In this case, it is preferable to set the minimum clearance T so that earth and sand or the like thrown into the bucket 8 from the slot 3 does not fall as low as possible.

  When the guide rail guide 15 is moved in the front-rear direction, the clearance T changes (see FIG. 14A). In this case, as shown in FIG. 15, the mounting peripheral plate 49b of the guide plate 49 The front and rear direction position of the guide plate 49 can be adjusted by inserting a shim plate 52 between the opening peripheral edge 50a of the machine frame 45 (see FIG. 15B). When it is desired to lower the plate surface 49a of the guide plate 49 in FIG. 15 (a) to the position of the two-dot chain line in FIG. 15, for example, the shim plate 52 is opened with the mounting peripheral plate 49b as shown in FIG. 15 (b). By interposing between the peripheral edge 50a, the position of the plate surface 49a can be adjusted. If comprised in this way, even if it is a case where the front-back direction position of the rail guide 15 is changed, the clearance T between the guide plate 49 and the bucket 8 can always be set to an optimal value.

  FIG. 16 shows another embodiment of the tilting guide rail guide 15 in which a raised portion 53 of the rail guide 15 is provided at a position approaching the insertion port 3. The raised portion 53 includes a lower inclined portion (third inclined portion) 53a that further inclines the inclined bucket 8 in the same direction, a straight portion 53b that maintains the inclined state, and an upper inclined portion (fourth portion that ends the inclination of the bucket). The upper inclined portion 53c is continuous with the upper inclined portion 15c. Accordingly, the third inclined portion 53a, the straight portion 53b, and the fourth inclined portion 53c are formed between the lower inclined portion 15a and the upper inclined portion 15c.

  Further, the position of the raised portion 53 is the timing immediately before receiving the earth and sand from the inlet 3 and is in a state of being inclined at a predetermined angle by the lower inclined portion 15a of the guide rail guide 15 as shown in FIG. The bucket 8 is further inclined in the same direction by the lower inclined portion 53 a of the raised portion 53. Thereby, the opening 8a of the bucket 8 becomes a more optimal angle with respect to the earth and sand throwing angle, and the thrown earth and sand can be thrown into the bucket 8 without spilling appropriately.

  Further, by further inclining the bucket 8 by the raised portion 53, the inclination angle θ2 of the side surface (front side surface) 8e on the front side of the bucket 8 is made larger than the throwing angle θ1 of earth and sand (θ1 < θ2), the adhesion of earth and sand to the side surface 8e on the front side of the bucket 8 can be eliminated. As a result, dirt such as adhesion of earth and sand to the bucket 8 can be reduced, and the adhesion of earth and sand on the side surface of the bucket can be prevented, so that efficient introduction of earth and sand without leakage, earth leakage and scattering, etc. Furthermore, it can suppress effectively. Thus, by increasing the inclination angle of the bucket 8, the inclination angle of the front side surface 8 e on the inlet side of the bucket 8 becomes a large angle θ 2 toward the lower side, so that adhesion of earth and sand to the bucket side surface is effective. Can be prevented. In FIG. 16, reference numeral 54 denotes a sand chute.

  In addition, although the said protruding part 53 was comprised by the lower inclination part 53a, the linear part 53b, and the upper inclination part 53c, it is good also as a shape in which the linear part 53b does not exist by forming the whole inclination part in circular arc shape and curve shape. . Therefore, the concept of the inclined portion includes an arc shape.

  In the present invention, as described above, by tilting the bucket 8 in the vicinity of the insertion port 3, it is possible to reliably input a transported object such as earth and sand into the bucket 8, and scattering and leakage of earth and sand to other than the bucket. Etc. can be largely prevented and the filling efficiency in the bucket can be improved.

  Further, by preventing scattering of earth and sand and the like, unnecessary load is not applied to the bucket, chain and the like, so that the service life of the bucket elevator can be significantly improved.

  In addition, the inclination angle or inclination timing of the bucket can be adjusted, and the object to be conveyed can be put into the bucket under the optimum conditions according to the type and properties of the object to be conveyed such as earth and sand. The load on the bucket or chain can be reduced, and the useful life of the bucket elevator can be improved.

  Moreover, adhesion of earth and sand etc. to the bucket side surface can be effectively prevented by increasing the inclination angle of the bucket.

  The bucket elevator according to the present invention can be used for transporting other various objects to be transported in addition to transporting earth and sand at a civil engineering work site.

DESCRIPTION OF SYMBOLS 1 Bucket elevator 1b Guide cylinder 3 Insertion port 5 Lower sprocket 6a, 6b Upper sprocket 7a, 7b Chain 8 Bucket 8a Upper surface opening 8b Left-right support shaft 8c Side surface 14 Protrusion 15 Inclination guide rail guide 15a Lower inclination part (1st inclination part) )
15c Upper inclined part (second inclined part)
21a, 21b Rotation center shaft 25 Cover 26 Slit 28 Arm 27 Weight 29 Anti-scattering plate 40 Mounting portion 45 Machine frame 46 Fixed portion 49 Guide plate 50 Opening portion 51 Front edge 53 Raised portion 53a Lower inclined portion (third inclined portion)
53c Upper slope part (4th slope part)
T Clearance X Conveyed object

Claims (6)

A bucket elevator that provides a plurality of buckets at predetermined intervals between a pair of left and right chains that are stretched between the lower sprocket and the upper sprocket, and circulates and transfers the object to be transported that has been introduced into the bucket from the lower entry port to the upper discharge chute In
The bucket is an upper surface opening bucket, and is suspended from the chain so as to be rotatable with a support shaft in the left and right direction. The bucket is provided with a protrusion, and a machine frame in the vicinity of the insertion port. Is provided with a guide rail guide for a certain range of inclination,
When the bucket ascends along the guide rail guide for inclination , the protrusion moves in a state in contact with the guide rail guide for inclination, so that the bucket uses the left-right support shaft as a rotation axis. The upper surface opening is configured to be inclined toward the inlet,
The inclination guide rail guide has a first inclination part that contacts the protrusion and inclines the bucket and a second inclination part that releases the engagement state of the bucket by releasing the engagement state of the protrusion. And
The inclined guide rail guide is provided so that the position thereof can be adjusted in the front-rear direction or the up-down direction with respect to the machine frame.
An opening is provided in the machine frame facing the front edge of the bucket in the inclined state,
The opening is configured so that it can be closed by a guide plate, and the mounting position of the guide plate to the opening can be adjusted in the front-rear direction.
A clearance is provided between a plate surface on the bucket side of the guide plate and the front end edge of the inclined bucket, and the clearance can be adjusted by adjusting the position of the guide plate in the front-rear direction. A bucket elevator characterized by that. A third inclined portion for further inclining the bucket in the inlet direction by the protrusion coming into contact between the first inclined portion and the second inclined portion of the guide rail guide for inclination, and the inclination The bucket elevator according to claim 1, further comprising a fourth inclined portion for releasing . Along with the pair of chains, a rubber cover is provided at the opposite part of both chains, a slit is formed in the center of the cover, and the lateral support shaft of the bucket is connected to the chain via the slit. according to claim 1 or 2, wherein the bucket elevator is characterized in that it is connected to. The pair of left and right scattering prevention plates are provided between the left and right side surfaces of the bucket and the pair of chains in a predetermined range in the vicinity of the charging port. Bucket elevator. The upper sprocket is constituted by a pair of opposed sprockets, the rotation center axes of these upper sprockets are provided only on the outer sides, and the bucket passes through the opposed inner sides of both upper sprockets. The bucket elevator according to any one of claims 1 to 4. The bucket elevator according to any one of claims 1 to 5 , wherein one end of an arm is connected to the lower sprocket, and a weight is provided at the other end of the arm .

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