JP2007160228A - Grain suction and conveyance device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grain suction and conveyance device which is compact and installed at a low cost. <P>SOLUTION: The grain suction and conveying device is provided with; a grain-feeding part which stores grain to be conveyed; an air conveyance passage through which the grain fed from the grain-feeding part is conveyed by air; a grain-recovering part which receives and recovers the grain conveyed through the air conveyance passage by air; a suctioning mechanism which is communicatively connected to the grain-recovering part, which communicates with the terminal part of the air conveyance part, and generates an air flow in the air conveyance passage by suctioning; and a branched suction pipe which branches at a middle point of the air conveyance passage and whose terminal part is communicatively connected to the grain-recovering part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a grain suction conveyance device.

  Conventionally, when grains such as rice are transported by air as a transported object, an air transport path through which the grain passes along with an air current, and a grain supply port that supplies the grain to the air transport path at the top wall of the start end of the air transport path An air jet pipe that jets air to the air conveyance path is arranged directly below the grain supply port, and an air feed consisting of a fan and a compressor is directed from the air jet pipe toward the conveyance destination of the air conveyance path. There has been an air conveying device that forcibly injects air from the device and conveys the grain by blowing it away.

Further, in such an air conveyance device, the grains blown off by air are directly flowed into the grain collection device arranged at the end of the air conveyance path (see, for example, Patent Document 1 and Patent Document 2). .
JP-A-8-215589 Japanese Patent Laid-Open No. 2003-001122

  However, the above-described conventional air conveyance device is provided with a powerful air supply device including a fan and a compressor that secures a pressure-feeding force sufficient to blow away the grain, and the grain blown off by the air is sent to the end of the air conveyance path. If the product is directly allowed to flow into the grain collecting device disposed in the container, the grain may collide with the wall of the collecting device and damage it.

  In addition, when a powerful air supply device is used, the air cooling device is required because the grain temperature is deteriorated and the moisture is reduced due to the temperature rise of the air, and there is a possibility that the entire air conveyance device is enlarged.

  An object of the present invention is to solve the above-mentioned problems and to provide a grain suction and conveyance device that is compact and does not damage the grain to be conveyed.

  (1) The present invention according to claim 1 is a grain supply unit for storing grains to be conveyed, an air conveyance path for air conveying the grains supplied from the grain supply unit, and an air conveyance from the air conveyance path A cereal collection unit that receives and collects the produced cereal, a suction mechanism that communicates with the cereal collection unit that communicates a terminal portion of the air conveyance path, and generates an air flow in the air conveyance path by intake air; and the air A grain suction and conveyance device including a branch intake pipe branched from the middle of the conveyance path and connected to the grain collection unit at its end is connected.

  (2) The present invention according to claim 2 is the grain suction conveyance device according to claim 1, wherein the branch intake pipe is branched upward from the air conveyance path.

  (3) The present invention according to claim 3 is the grain suction conveyance device according to claim 1 or 2, wherein the branch intake pipe is once opposite to the grain conveyance direction with respect to the air conveyance path. It is branched.

  (4) The present invention according to claim 4 is the grain suction conveyance device according to any one of claims 1 to 3, wherein the start end portion of the air conveyance path is bent upward and curved upward. The start opening opened toward the outside is used as an outside air communication port, and the grain supply unit is arranged so that the grain supply port of the grain supply unit faces the outside air communication port.

  (5) The present invention according to claim 5 is the grain suction conveyance apparatus according to claim 4, wherein the outside air communication port has a larger diameter than the grain supply port, and is between the grain supply port and the outside air communication port. Are separated by a predetermined distance.

  (6) The present invention according to claim 6 is the grain suction conveyance device according to any one of claims 1 to 3, wherein an outside air introduction section in which a start end portion of the air conveyance path is laterally extended; Branching into a grain introduction portion that is curvedly extended upward, and the start end opening of the outside air introduction portion serves as an outside air communication port, while the grain supply port of the grain supply portion communicates with the start end opening of the grain introduction portion It is connected.

  (7) The present invention according to claim 7 is the grain suction conveyance device according to any one of claims 1 to 6, wherein the air conveyance path is a single unit facing the grain supply section. An upstream pipe, a plurality of downstream pipes each having a terminal end connected to a plurality of grain recovery sections and provided with the branch intake pipes, and one of the upstream pipe and the plurality of downstream pipes are alternatively selected. And a conveyance path switching unit that is connected to and communicated with.

  (8) The present invention according to claim 8 is the grain suction conveyance device according to claim 7, wherein the conveyance path switching unit includes a multi-stage connection pipe group and one connection in the connection pipe group. And an actuator that translates the position of the connecting tube group so that the start end communicates with the upstream pipe and the end end communicates with one of the plurality of downstream pipes.

  According to the present invention, when the branch intake pipe reduces the air conveyance speed in the air conveyance path and reaches the grain recovery unit, even if a grain such as rice collides with the wall of the recovery unit, the damage is caused. Can be reduced as much as possible. In addition, there is no possibility that the grain that has flowed into the grain collection unit from the air conveyance path will rise and be sucked into the suction mechanism.

  The grain suction conveyance device according to the present embodiment is a grain supply unit that stores grains to be conveyed, an air conveyance path that conveys grains supplied from the grain supply unit by air, and an air conveyance from the air conveyance path. A suction part that communicates and connects a grain recovery part that receives and collects the grain, a grain recovery part that communicates a terminal part of the air conveyance path, and generates an air flow in the air conveyance path by intake air; and the air conveyance A branch intake pipe that branches off from the middle of the road and has a terminal end connected to the grain recovery unit is provided.

  In other words, it is not a pressure-feeding method that tends to be large, and it is possible to gently convey grains such as rice, which is a compact structure and as a conveyance target, as air conveyance by suction, and the air conveyance path By providing the branch intake passage in the middle, it is possible to reduce the conveying speed, reduce the impact applied to the grain, and prevent damage to the grain as much as possible.

  In addition, the grain recovery unit has an air inlet communicating with the suction mechanism. However, since the flow rate of the transported grain into the grain recovery unit is slow, the grain recovery unit collides with a wall or the like in the grain recovery unit. Therefore, there is no risk of grain mixing from the intake port to the suction mechanism.

  In order to prevent the grains moving in the air conveyance path from flowing into the branch intake pipe, the branch intake pipe is preferably branched upward from the air conveyance path, more preferably The air conveyance path may be once branched in a direction opposite to the grain conveyance direction.

  In other words, the grain can be given a greater resistance, including the gravity of the grain itself, than the force that attracts the grain conveyed through the air conveyance path to the branch intake flow path. The air conveyance path that can be carried is softly conveyed to the grain recovery unit at a reduced conveyance speed.

  In addition, a net or the like having an eye smaller than the grain to be transported is disposed at the communication portion between the air conveyance path and the branch intake pipe, thereby more reliably preventing the grain from flowing into the branch intake pipe. You can also.

  Further, in the grain suction conveyance device having the above-described configuration, the start end portion of the air conveyance path is bent upward in a curved shape, and the start end opening opened upward serves as an outside air communication port. The grain supply unit may be arranged so that the grain supply port of the grain supply unit faces.

  In other words, the outside air communication port, which is an intake port for outside air drawn into the air conveyance path, and the grain input port for taking grains such as rice to be air conveyed into the air conveyance path are also used. It can be easily supplied into the air conveyance path by natural fall, and the outside air is sucked from the grain inlet where the grains fall, so that the grains are effectively supplied into the air conveyance path without being dissipated. Moreover, the air is smoothly transported through the air transport path as it is, and is effectively accommodated in the grain recovery unit.

  In addition, the air conveyance path only needs to have a simple tube-like configuration with the starting end side curved upward, so that it has a simple structure that does not require a special pipe for supplying air in particular. Grain can be conveyed by air by suction using a suction mechanism with a relatively small capacity compared to a pneumatic feeding device, etc., so that the entire device can be made compact, including power consumption, etc. Cost reduction can be achieved.

  In addition, since the grain supply unit and the air conveyance path are independent from each other, it is not necessary to connect the grain supply unit and the air conveyance path when manufacturing the grain suction conveyance device, and the production of the entire apparatus is facilitated. From this point, it is possible to reduce the cost.

  Further, in the above configuration, the outside air communication port may have a larger diameter than the grain supply port, and the grain supply port and the outside air communication port may be spaced apart from each other by a predetermined distance.

  By adopting such a configuration, it is possible to more reliably prevent the grains discharged from the grain supply port from being dissipated outside the system.

  Further, as another embodiment of the air conveyance path, the following configuration may be adopted.

  That is, the start end portion of the air conveyance path is branched and formed into an outside air introduction portion extended laterally and a grain introduction portion extended in a curved shape upward, and the opening of the start end of the outside air introduction portion serves as an outside air communication port. On the other hand, the grain supply port of the grain supply part is connected to the start end opening of the grain insertion part.

  As such an apparatus, it becomes a compact configuration as in the above-described embodiment, and moreover, grain can be conveyed by air by suction using a suction mechanism having a relatively small capacity compared to an air feeding apparatus of a system that pumps air. The entire apparatus can be made compact, and the cost can be reduced including power consumption.

  Also, with this configuration, the outside air communication port becomes a dedicated intake port for outside air, and can sufficiently suck in the required amount of outside air. At the same time, the natural fall from the grain supply port makes it easy and reliable. The air can be supplied to the inside of the air conveyance path to smoothly carry the air.

  In any of the above-described forms of the air conveyance path, the grain supply port is provided with an openable / closable shutter, and when necessary, the shutter is opened to open the grain supply port. Is supplied into the air conveyance path.

  Note that the shutter opening operation may be manual, but it is preferable, for example, to be interlocked with the operation of the suction mechanism. When the suction mechanism is activated, the shutter is opened, and when the suction mechanism is stopped, the shutter is closed. With this configuration, the grain can be easily conveyed by air only by driving the suction mechanism.

  By the way, when branching the cylindrical outside air introduction portion extending in the horizontal direction and the cylindrical grain introduction portion curved upward, the starting end portion of the cylindrical air conveyance path is curved upward, and the curved portion And a cylindrical outside air introduction part having openings at both ends can be connected to the notch. Alternatively, it is also possible to open an upper part of the start end side of the air conveyance path extending horizontally and fit a curved cylindrical grain introduction part into the opening.

  In any case, a grain receiving plate extending in the transport direction to the inside of the air transport path may be provided with an appropriate length from the end of the grain introduction part located in the air transport path.

  That is, a grain receiving plate is extended from the end of the grain introduction part located substantially at the center of the air conveying path so as to partition the air conveying path up and down, and the grain receiving plate drops from the grain supplying part. It is advisable to suck and convey the cereal to be sucked by air after it has been received.

  With this configuration, a large amount of grain does not fall at once and accumulates in the air conveyance path, and the grain can be smoothly sucked and conveyed by air.

  As still another embodiment, the air conveyance path has a single upstream pipe facing the grain supply unit and a plurality of grain recovery units, each having a terminal end connected to each other. It can also be set as the structure provided with the provided downstream pipe | tube, and the conveyance path switching part which selectively connects the said upstream pipe | tube and one in the said some downstream pipe | tube.

  By adopting such a configuration, it is possible to convey a grain to a desired grain collection unit by installing a plurality of grain collection units and operating the conveyance path switching unit. And it doesn't hurt the grain.

  By the way, as the transfer path switching unit, for example, a multi-stage connection pipe group, and one connection pipe in the connection pipe group has a start end as the upstream pipe and a terminal end as one of the plurality of downstream pipes. And an actuator that translates the position of the group of connecting pipes so as to communicate with each other. As the actuator, for example, an actuator capable of a reciprocating motion such as an air cylinder or an electric cylinder, or a combination of an electric motor or the like with a predetermined movement direction conversion mechanism such as a gear is conceivable.

  With such a configuration, the configuration of the conveyance path switching unit is simplified, and an alternative change to one of the plurality of downstream pipes communicating with the grain recovery unit can be easily and reliably performed.

  Further, in each of the above-described embodiments, the end portion of the air conveyance path is curved downward, and the conveyance speed is reduced while guiding the conveyance direction of the grains conveyed into the grain recovery unit downward. A recovery guide can be attached.

  In the past, the transported grain could hit and damage the inner wall of the grain recovery unit, etc., but this recovery guide speeded up the transported grain to the inner wall of the grain recovery unit. It is possible to prevent collision and effectively prevent grain damage, and more reliably prevent damage to commercial value.

  More preferably, the collection guide may have a pair of left and right side walls standing in an ear shape on a guide body having a flat plate shape or a circular arc shape in cross section. With such a side wall, it is possible to more reliably guide grains that may spread and scatter to the side only by the guide main body and collide with the inner wall surface or the like of the grain recovery unit, so that the above effect is further enhanced. Is possible.

  Further, instead of the collection guide, a receiving blade for receiving the conveyed product while rotating in the same direction as the inflow direction of the conveyed product may be disposed in the grain collecting unit.

  This receiving blade can also prevent the grain transported by the grain from strikingly colliding with the inner wall of the grain recovery unit, etc., so that it is possible to effectively prevent damage to the grain and to impair the commercial value. Can be prevented.

  As described above, the grain suction conveyance device according to the present invention has a simple and compact structure, and can smoothly convey grains such as rice, while eliminating the need for a large-sized air feeding device. Since the conveying speed can be reduced, the impact applied to the grain is weakened, and damage to the grain can be prevented as much as possible.

  In addition, unlike the air pressure feeding method, a dedicated air supply pipe that is considered to be frequently required for maintenance is not required, so that the maintainability of the entire apparatus is improved. In other words, when the grains to be conveyed by air are rice or beans, the derived waste often contains moisture such as straw and leather, and these air supply pipes are extremely dirty, and thus the air supply pipes are unnecessary. It is very beneficial to realize a configuration that does.

  Hereinafter, specific embodiments of the grain suction and conveyance device according to the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic overall view showing a grain suction / conveying apparatus A according to the present embodiment. As shown, the grain suction / conveying apparatus A is supplied from a grain supply unit 1 and the grain supply unit 1. An air conveyance path 2 that serves as a conveyance path for the grain a such as rice, a grain collection unit 4 that receives the grain a that has been conveyed by air through the air conveyance path 2, and a communication connection to the grain collection unit 4, A suction mechanism 3 that sucks the grain a together with the air through the grain recovery unit 4 and the air conveyance path 2 is provided.

  The grain a stored in the grain supply unit 1 is supplied to the air conveyance path 2 by driving the suction mechanism 3 and can be conveyed by air to the grain collection unit 4 by suction.

  The grain supply unit 1 includes a hopper that supplies the stored grain a to the air conveyance path 2. A cylindrical peripheral wall part 12 is continuously provided on a funnel-shaped bottom surface 11 that is inclined downward. A short grain supply cylinder 14 having a grain supply port 13 protrudes downward. The grain supply cylinder 14 is provided with an openable / closable shutter (not shown). The structure of such a shutter is not particularly limited, and for example, a simple structure using a slidable flat plate may be used. The opening width of the grain supply port 13 can be adjusted by the sliding amount of the shutter, and the supply amount per hour of the grain a to the air conveyance path 2 can be adjusted.

  The air conveyance path 2 is formed in a cylindrical shape having openings at both ends, the start end portion 2a is curved upward at a substantially right angle, and the start end opening 27 is directed upward. And by curving from the start end part 2a and extending horizontally, the end part 2b to which the collection guide 9 described later is attached is passed through the upper part of the side wall 40 of the grain collection part 4, thereby allowing the air conveyance path 2, the grain collection part 4 and Are connected. Reference numeral 2c denotes a joint portion between the air conveyance path 2 and the side wall 40 of the grain collection unit 4, and reference numeral 29 denotes a conveyance path end opening.

  As described above, the grain suction conveyance device A according to the present embodiment connects the suction mechanism 3 to the grain collection unit 4 and communicates the grain a together with the air via the grain collection unit 4 and the air conveyance path 2. Since the air conveyance path 2 has a simple tube-like configuration with the start end portion 2a curved upward, it is not particularly necessary to provide a dedicated pipe for supplying air. It has a simple structure.

  Furthermore, since the grain a can be conveyed by air by suction by the suction mechanism 3 having a relatively small capacity as compared with an air feeding device of a system that pumps air, the entire device can be made compact and power consumption can be reduced. The cost of the apparatus can be reduced.

  FIG. 2 is an explanatory view showing the start end portion 2a of the air conveyance path 2. As shown in the figure, the start end opening 27 of the start end portion 2a serves as an outside air communication port, and the grain is placed in the start end opening 27 (outside air communication port). The grain supply part 1 is arrange | positioned so that the supply port 13 may face. In addition, the start opening 27 serving as an outside air communication port has a larger diameter than the grain supply port 13, and the grain supply port 13 is disposed above the start end opening 27 by a predetermined distance. In FIG. 2, reference numeral 21 denotes an enlarged diameter portion formed on the distal end side of the start end portion 2 a of the air conveyance path 2, which has a diameter larger than the diameter of the other part of the air conveyance path 2.

  As described above, in the present embodiment, the outside air communication port that is an intake port for the outside air drawn into the air conveyance path 2, and the grain input port that takes in the grain a such as rice to be air conveyed into the air conveyance path 2. However, as shown in FIG. 2, the grain a is easily supplied into the air conveyance path 2 by natural fall, and the grain a falls. Since the outside air is sucked in from the input port and functions as an outside air communication port, the grain a is effectively supplied into the air conveyance path 2 without being dissipated, and is carried through the air flow in the air conveyance path 2 as it is. It flows smoothly and is transported, and is effectively accommodated in the grain collection unit 4.

  Further, since the grain supply unit 1 and the air conveyance path 2 are independent from each other, a process of connecting the grain supply unit 1 and the air conveyance path 2 by welding or the like is not required when the grain suction conveyance apparatus A is manufactured. Further, the entire grain suction / conveying device A can be easily manufactured, and the cost can be reduced also in this respect.

  As shown in FIG. 1, the grain collection unit 4 includes a receiving hopper 41 communicating with the air conveyance path 2, and a grain take-out port 42 from the receiving hopper 41 to the outside at the lower end of the receiving hopper 41. And a rotary valve 43 is disposed at the grain outlet 42. Reference numeral 44 denotes an intake pipe projecting from the ceiling that forms the upper end of the receiving hopper 41, and the suction mechanism 3 that sucks the air in the air conveyance path 2 and the receiving hopper 41 through the intake pipe 44 is connected in a continuous manner. is doing. Reference numeral 45 denotes an intake duct that connects the suction mechanism 3 and the intake pipe 44, and 46 denotes an intake port that communicates with the intake pipe 44.

  In addition, the air conveyance path 2 is provided with a branch intake pipe 5 that branches from the middle of the air conveyance path 2 and that is connected to the grain collection unit 4 through the end portion 51.

  The branched intake pipe 5 is provided on the downstream side of the air conveyance path 2, that is, the portion immediately before the grain collection unit 4, and once from the air conveyance path 2 is opposite to the conveyance direction of the grain a. In addition to branching upward and curving toward the grain collection unit 4 side, the end portion 51 is extended to penetrate the inclined ceiling wall 47 of the receiving hopper 41 and at an angle of approximately 45 degrees as it is. It is extended diagonally downward. Reference numeral 50 denotes a branch pipe tip opening of the branch intake pipe 5 that opens obliquely downward, and serves as an intake port of the branch intake pipe 5. Further, 52 is the same bending portion, and 53 is the same branching portion.

  With this configuration, the intake air from the suction mechanism 3 is made from both the conveyance path end opening 29 and the branch pipe tip opening 50, and the suction force of the air conveyance path 2 is reduced.

  Moreover, since the branch intake pipe 5 is branched upward in the direction opposite to the conveying direction of the grain a, the large resistance including the gravity of the grain a itself causes the grain a to be sucked into the branch intake pipe 5. The grain a is superior to the force, and the grain a is conveyed to the receiving hopper 41 of the grain collection unit 4 softly at a reduced conveyance speed in the air conveyance path 2 that can go straight without resistance.

  Therefore, the impact applied to the grain a that is conveyed by air is reduced, and damage to the grain a can be prevented as much as possible.

  Furthermore, since the speed at which the conveyed grain a flows into the receiving hopper 41 becomes slow, it does not collide with a wall body such as the side wall 40 of the receiving hopper 41 and soar, and the branch pipe tip opening There is no possibility that the grain a is sucked from 50 and mixed into the suction mechanism 3.

  It should be noted that the curvature and circumferential length of the curved portion 52 of the branch intake pipe 5 or the branch angle from the branch portion 53 can be appropriately set. In addition, a filter (not shown) such as a mesh body having eyes smaller than the grain a to be transported is disposed at the branching portion 53 serving as a communication portion between the air transport path 2 and the branch intake pipe 5. Thus, it is possible to more reliably prevent the grain a from flowing into the branch intake pipe 5.

  Next, another embodiment of the grain suction conveyance device A will be described with reference to FIGS.

  In this embodiment, the basic configuration is the same as the embodiment shown in FIG. 1 and FIG. 2, but the air transport path 2 has a single upstream pipe 7 facing the grain supply unit 1, A plurality of downstream pipes 8 each having a terminal end connected to the plurality of grain collecting units 4 and provided with the branch intake pipes 5 are selected, and one of the upstream pipes 7 and one of the plurality of downstream pipes 8 is selected. The difference is that the apparatus is configured to include a conveyance path switching unit 6 that is connected in a continuous manner. In addition, about the other component same as previous embodiment, the same code | symbol is attached | subjected and description here is abbreviate | omitted.

  That is, in the present embodiment, a plurality of grain collection units 4 can be installed, and the grain a can be conveyed to the desired grain collection unit 4 by operating the conveyance path switching unit 6. Moreover, since the branched intake pipes 5 are provided in the downstream pipes 8 as well, the grain a can be prevented from being damaged as much as possible.

  Here, the configuration of the transport path switching unit 6 will be described.

  As shown in FIGS. 3 and 4, the transport path switching unit 6 includes a connecting pipe group 60 arranged in multiple stages, and one connecting pipe 61 (62) in the connecting pipe group 60 having a start end 61 a (62 a). And an actuator 63 that translates the position of the connecting pipe group 60 so that the terminal end 61b (62b) communicates with one of the plurality of downstream pipes 8, and these are box-shaped. The casing 64 is housed and disposed. As shown in FIG. 4, the casing 64 has an upstream opening 64 a communicating with the upstream pipe 7 and two openings communicating with the downstream pipes 8, ie, a first downstream opening 64 b and a second opening. A downstream opening 64c is formed.

  By the way, in this embodiment, the grain collection | recovery part 4 is set as the case where two sets, the 1st grain collection | recovery part 4-1 and the 2nd grain collection | recovery part 4-2, are installed. Therefore, for the downstream pipe 8, the first downstream pipe 8-1 communicated with the first grain collection unit 4-1, and the second downstream pipe 8-2 communicated with the second grain collection unit 4-2. As shown in FIG. 4, the connection pipe group 60 having a multi-stage is provided with a first connection pipe 61 for transporting the grain a to the first grain collection unit 4-1, and a second connection pipe 60. The second connection pipe 62 for conveying the grain a to the grain recovery unit 4-2 is arranged in parallel via a connection plate 65.

  In the present embodiment, since the first downstream pipe 8-1 is located on the upper side and the second downstream pipe 8-2 is located on the lower side, the first connecting pipe 61 is a bent pipe formed in a gentle S-shape. The second connecting pipe 62 is a straight pipe.

  In addition, as the actuator 63, for example, an air cylinder used in the present embodiment, an electric cylinder, or the like capable of linearly reciprocating can be suitably used. In FIG. 4, 66 is a cylinder body, and 67 is a cylinder coupling rod.

  With the above configuration, when the grain a is conveyed by air to the first grain collection unit 4-1, the actuator 63 is driven to contract the cylinder coupling rod 67 as shown in FIG. The start end 61a of the pipe 61 may be communicated with the upstream opening 64a, and the end 61b may be communicated with the first downstream opening 64b. On the other hand, when the grain a is conveyed by air to the second grain collecting unit 4-2, as shown in FIG. 4B, the actuator 63 is driven to extend the cylinder connection rod 67, which is a straight pipe. What is necessary is just to connect the start end 62a of the 2nd connection pipe 62 to the upstream opening 64a, and the termination | terminus 62b to the 2nd downstream opening 64c.

  Note that the actuator 63 does not necessarily have to use a cylinder. For example, a predetermined movement direction conversion mechanism including a gear or the like may be combined with an electric motor or the like.

  According to the present embodiment, the configuration of the transport path switching unit 6 is also simplified, and it is selected as one of the downstream pipes 8-1, 8-2 communicating with the grain collection units 4-1, 4-2. A single change can be made easily and reliably.

  Next, a modified example of the start end 2a of the air conveyance path 2 will be described with reference to FIG.

  In this example, the start end 2 a of the air conveyance path 2 is branched into an outside air introduction portion 24 that is extended laterally and a grain introduction portion 25 that is extended upward in a curved shape, and the start end of the outside air introduction portion 24 is formed. While the opening 26 serves as an outside air communication port, the grain supply port 13 of the grain supply unit 1 is connected to the start end opening 27 ′ of the grain introduction unit 25.

  Even in such a configuration, the grain a can be air-conveyed by suction by the suction mechanism 3 having a relatively small capacity compared to an air-feeding device or the like that pumps air, so that the entire device can be made compact. And cost reduction including power consumption can be achieved.

  Further, in this configuration, the start end opening 26 serving as an outside air communication port serves as an intake port exclusively for outside air, and can sufficiently suck in a necessary amount of outside air, and at the same time, due to natural fall from the grain supply port 13 The grain a can be easily and reliably supplied into the air conveyance path 2 to perform smooth air conveyance.

  In addition, when branching the cylindrical outside air introduction portion 24 extending in the horizontal direction and the cylindrical grain introduction portion 25 that is curved upward, the starting end portion of the cylindrical air conveyance path 2 is curved upward, What is necessary is just to connect the cylindrical outside air introduction part 24 which made the both ends opening to this notch part while notching the lower part of this curved part. Alternatively, the upper part of the starting end side of the air conveyance path 2 extending horizontally may be cut open, and a curved cylindrical grain introduction part 25 may be fitted into the opening.

  Further, a grain receiving plate 28 is extended from the end of the grain introduction part 25 located in the air conveyance path 2 to an appropriate length in the conveyance direction inside the air conveyance path 2.

  That is, a grain receiving plate 28 is extended from the grain introduction portion end 25a located substantially at the center of the air conveying path 2 so as to partition the air conveying path 2 up and down. The grain a falling from 1 is once received and then sucked and conveyed by air. With such a configuration, a large amount of grain a does not fall at once and accumulates in the air conveyance path 2, and the suction and conveyance of the grain a by air can be performed smoothly.

  Next, the collection guide 9 provided on the terminal end side of the air conveyance path 2 in each embodiment described above will be described.

  FIG. 6 is an explanatory view of the collection guide 9. As shown in the drawing, the collection guide 9 according to the present embodiment has a guide wall 90 having a substantially bay shape in sectional view for changing the conveying direction of the grain a from the horizontal direction to the vertical direction. And a pair of side walls 91, 91 extending in an arc shape from both ends of the guide wall 90 and having a predetermined height extending along the conveying direction, and are formed in a substantially bowl shape in an arc shape in cross section.

  Such a collection guide 9 can be formed by a simple process of bending a circular tube and notching an inner portion thereof, or notching an inner portion of the circular tube and then bending the circular tube. Therefore, not only the guide wall 90 but also the side walls 91 and 91 formed in the shape of ears can be provided at low cost without trouble. Further, if the collection guide 9 is created by cutting out the circular tube in this way, an arcuate guide surface in which the guide surface of the guide wall 90 and the guide surfaces of the side walls 91 and 91 are continuous is formed. Grain a guided by 91 and 91 can be naturally brought close to the guide wall 90 side along the guide surface, and grain a can be guided more smoothly. In addition, the guide wall 90 and the side walls 91 and 91 can be formed not only in a circular arc shape continuous with each other as described above but also in a flat plate shape.

  By providing the collection guide 9, the conveyance path of the grain a can be changed to a substantially right angle and the conveyance speed is reduced, so that the grain a slowly descends in cooperation with the branch intake pipe 5 described above. As a result, the grain a can be prevented from being damaged and mixed into the suction mechanism 3 as much as possible.

  In particular, in the present embodiment, since the base end portion of the collection guide 9 is an enlarged portion 92 whose cross-sectional area is enlarged in the conveyance direction, the conveyance speed of the grain a can be once reduced by the enlarged portion 92. After the deceleration, the grain a is swung in the longitudinal direction along the collection guide 9 and further decelerated. Therefore, also from such a configuration, it is possible to effectively prevent the grain a discharged from the collection guide 9 from colliding with the inner wall surface of the receiving hopper 41 and damaging it.

  In the present embodiment, not only the base end portion of the recovery guide 9 but also the terminal side connection portion 2d of the air conveyance path 2 connecting the recovery guide 9 has the same cross-sectional area as the enlarged portion 92. The air conveyance path 2 and the collection guide 9 can be connected in a tight state.

  By the way, the collection guide 9 according to the present embodiment has a constant width of the guide wall 90 and the side walls 91 and 91 connected to both ends of the guide wall 90 are also substantially parallel to each other. The width of the guide wall 90 is gradually widened in the transport direction, and the side walls 91 and 91 are gradually separated in the transport direction, or conversely, the width of the guide wall 90 is narrowed in the transport direction, It is also possible to adopt a structure in which the side walls 91, 91 gradually approach toward the transport direction. For example, when the cross-sectional area of the base end portion of the guide wall 90 is enlarged in the conveyance direction, the conveyance speed of the grain a can be further reduced by the enlarged part and discharged from the collection guide 9, so that the damage of the grain a Can be more effectively prevented.

  As described above, the present invention has been described through each embodiment. However, the present invention is not limited to the embodiment, and the shape of each component and the layout of the apparatus are within the scope of the claims. These may be changed as appropriate.

It is a typical whole explanatory view showing the grain suction conveyance device concerning a 1st embodiment. It is explanatory drawing which shows the start end part of an air conveyance path. It is explanatory drawing which shows the grain suction conveyance apparatus which concerns on other embodiment. It is explanatory drawing by the cross sectional view of a conveyance path switching part. It is explanatory drawing which shows the modification of the start end part of an air conveyance path. It is explanatory drawing of a collection guide.

Explanation of symbols

A Grain suction conveyance device a Grain 1 Grain supply part 2 Air conveyance path 2a Start end part 2b Termination part 3 Suction mechanism 4 Grain recovery part 5 Branch intake pipe 6 Conveyance path switching part 7 Upstream pipe 8 Downstream pipe 8-1 First downstream pipe 8-2 Second downstream pipe 9 Collection guide 13 Grain supply port 61 First connection pipe 62 Second connection pipe

Claims (8)

A grain supply unit for storing grains to be conveyed;
An air conveyance path for pneumatically conveying the grains supplied from the grain supply unit;
A grain collection unit that receives and collects the grains conveyed by air from the air conveyance path;
A suction mechanism that is connected in communication with the grain recovery unit that communicates the terminal portion of the air conveyance path, and generates an air flow in the air conveyance path by suction;
A branched intake pipe branched from the middle of the air conveyance path and connected to the grain recovery unit in a communicating end,
A grain suction conveyance device comprising:   The grain suction conveyance device according to claim 1, wherein the branch intake pipe is branched upward from the air conveyance path.   The grain suction / conveyance device according to claim 1 or 2, wherein the branch intake pipe is once branched with respect to the air conveyance path in a direction opposite to a grain conveyance direction.   The start end portion of the air conveyance path is bent upward and curved, and the start end opening opened upward serves as an outside air communication port, and the grain supply port of the grain supply unit faces the outside air communication port. The grain suction conveyance device according to any one of claims 1 to 3, further comprising a grain supply unit.   5. The grain suction and conveying device according to claim 4, wherein the outside air communication port has a larger diameter than the grain supply port, and the grain supply port and the outside air communication port are separated by a predetermined distance.   One of the start end portion of the air conveyance path is branched into an outside air introduction portion extended laterally and a grain introduction portion extended upwardly in a curved shape, and the start end opening of the outside air introduction portion serves as an outside air communication port The grain suction / conveying device according to any one of claims 1 to 3, wherein a grain supply port of the grain supply unit is connected in communication with a start end opening of the grain introduction unit. The air conveyance path is
A single upstream pipe facing the grain supply section;
A plurality of downstream pipes each having a terminal end connected to a plurality of grain collecting sections and provided with the branch intake pipes;
A transfer path switching unit that selectively connects the upstream pipe and one of the plurality of downstream pipes,
The grain suction conveyance device according to any one of claims 1 to 6, further comprising: The transport path switching unit is
A group of connecting pipes arranged in multiple stages;
An actuator that translates the position of the connection pipe group so that one connection pipe in the connection pipe group communicates with the upstream pipe at the start end and one of the plurality of downstream pipes at the end;
The grain suction conveyance device according to claim 7, further comprising:

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