JP4575045B2 - Air transfer device - Google Patents

Description

  The present invention relates to an air conveyance device.

  Conventionally, when grains such as rice are conveyed by air as a conveyed item by suction or blast, the air conveying apparatus is provided with an air conveying path for allowing the conveyed item to pass along with the air current, and at the top of the air conveying path. A transport object supply port for supplying a transport object to the air transport path is provided on the wall, and an air supply pipe for supplying air to the air transport path is disposed directly below the transport object supply port.

In particular, the air supply pipe is fixed to the air conveyance path, and the positional relationship between the conveyed product supply port and the air supply pipe is not changed. For this reason, when a conveyed product is supplied into the air conveyance path from the conveyed product supply port, the amount of the conveyed product supplied at a time in front of the air supply pipe is always constant, and is supplied to the front of the air supply pipe. The conveyed product was conveyed with the air supplied from the air supply pipe to the terminal end side of the air conveyance path (see, for example, Patent Document 1).
Japanese Unexamined Patent Publication No. 2003-1122

  However, since the positional relationship between the conveyed product supply port and the air supply pipe does not change as described above in the conventional air conveying device, for example, conveyed items having different sizes, shapes, and weights, such as rice and rice husks, are used as air. Even when transporting, the transported material is supplied in the same way to the front of the air supply pipe, and heavy rice can be smoothly transported by air, while the heavy rice husk is from the front of the air supply pipe. There has been a problem that the air is immediately transported and the supply amount becomes insufficient.

  An object of the present invention is to solve the above-described problems and to provide an air conveyance device that can smoothly carry air even for different types of conveyance objects.

Therefore, in the air conveyance device of the present invention, an air supply pipe for supplying air from the air supply port at the tip to the air conveyance path is provided in the air conveyance path for air conveyance of the conveyance object supplied from the conveyance object supply port. In the arranged air conveyance device, the air supply pipe is linked to a shutter that opens and closes the conveyance object supply port, and is disposed so as to be able to advance and retreat immediately below the conveyance object supply port.

In addition, the air conveyance device of the present invention is also characterized by the following points.
(1) The air supply pipe can be withdrawn to the outside of the air transfer device.
(2) The air supply pipe is withdrawn while contacting the doorway to the air transfer device.
(3) The air supply pipe slides along the bottom wall of the air conveyance path .

According to the first aspect of the present invention, since the air supply pipe is disposed so as to be able to advance and retreat immediately below the conveyed product supply port, even when conveying different types of conveyed products by air, the conveyed product supply By adjusting the amount of entry of the air supply pipe immediately below the mouth, an appropriate amount of the transported object corresponding to each transported object can be supplied to the front of the air supply pipe. Therefore, even if it is a different kind of conveyed product, each can be smoothly conveyed by air. In addition, since the air supply pipe is interlocked and connected to a shutter that opens and closes the conveyed product supply port, it is possible to save the trouble of separately operating the opening and closing of the shutter and the advance and retreat of the air supply pipe. By driving the supply pipe with the same drive source, the cost required to drive both can be reduced.

  According to the second aspect of the present invention, since the air supply pipe can be withdrawn to the outside of the air conveyance device, the air supply pipe is easily contacted with a conveyed product and easily damaged or damaged. Can be maintained.

  According to the third aspect of the present invention, since the air supply pipe is retracted while being in contact with the doorway to the air conveyance device, when the air supply pipe retreats outside the air conveyance path, the air supply pipe Dirt such as debris adhering to the outer peripheral surface of the pipe is scraped off at the edge of the doorway, and the air supply pipe is automatically cleaned. Therefore, the labor required for cleaning the air supply pipe can be saved.

According to the fourth aspect of the present invention, since the air supply pipe slides along the bottom wall of the air conveyance path, the air supply pipe from the lower side with respect to the conveyance object that has fallen into the air conveyance path. Air can be applied, and the conveyed product can be lifted to facilitate air conveyance. Moreover, the conveyed product does not enter the lower portion of the air supply pipe and remain without being conveyed by air.

  The air conveyance device according to the present invention includes an air supply pipe for supplying air from the air supply port at the tip to the air conveyance path in an air conveyance path for air conveyance of the conveyance object supplied from the conveyance object supply port. In particular, the air supply pipe is disposed so as to be capable of advancing and retreating directly below the transported object supply port.

  In the above air transport device, the transported object supplied from the transported object supply port into the air transport path is deposited around the air supply pipe immediately below the transported object supply port, The conveyed product supplied in front of the air supply port rides on the air current and is conveyed by air. At this time, since the air supply pipe can be advanced and retracted immediately below the transported object supply port, the air supply pipe is supplied to the front of the air supply pipe depending on how far the air supply pipe enters just below the transported object supply port. The amount of transported goods will change.

  In other words, if the start end side of the air conveyance path is called upstream and the termination end side is called downstream, when the air supply pipe is allowed to enter only directly below the end on the upstream side of the conveyed product supply port, Conveyed materials can be deposited in front of the air supply port over the same width as the opening width of the conveyed product supply port and at a height from the conveyed product supply port to the bottom wall of the air conveyance path. If the supply pipe is made to enter further downstream just below the conveyed product supply port, the amount of the conveyed product that accumulates on the air supply pipe increases, and the accumulated width of the conveyed product that accumulates in front of the air supply port. And the deposition height is reduced. Therefore, the conveyed product can be conveyed with air without increasing the air flow speed during air conveyance, and the conveyed item that cannot be conveyed in front of the air supply pipe is prevented from remaining and preventing the air conveyance path from being clogged. be able to.

  In particular, when the air supply pipe is entered just below the downstream end of the conveyed product supply port, the conveyed product is supplied directly from the conveyed product supply port in front of the air supply port of the air supply tube. In front of the air supply port of the air supply pipe, only the transported product that has flowed down from the transported product supply port and hit the air supply pipe directly below and slanted forward from there is supplied. It becomes. Therefore, the conveyed product does not accumulate at the height from the conveyed product supply port to the bottom wall of the air conveyance path in front of the air supply port, and the accumulated height of the conveyed product can be reliably reduced. Can be pneumatically transported more smoothly. In addition, the air is smoothly conveyed in this way, and the air is smoothly supplied from the air supply port into the air conveyance path by preventing the conveyance object from being collected in front of the air supply port of the air supply pipe. Therefore, air conveyance can be performed more smoothly.

  On the other hand, as described above, when the air supply pipe is advanced to just below the downstream end of the conveyed product supply port, the amount of the conveyed product supplied to the front of the air supply port of the air supply tube is limited. As a result, the amount of the conveyed product that can be conveyed by air at a time decreases. Therefore, the air supply pipe adjusts the amount of entry in accordance with the type of the conveyed product to be air conveyed so that an appropriate amount of conveyed product is supplied in front of the air supply port.

  For example, if the object to be transported by air is light, air can be transported even if the object to be conveyed is supplied to some extent in front of the air supply port. Can be efficiently transported at once, and if the transported object to be transported by air is heavy, if a large amount of transported object is supplied in front of the air supply port, the transported object that has not been transported by air will accumulate. Therefore, the amount of advancement of the air supply pipe may be increased, and the conveyed product may be conveyed by small amounts so that the conveyed product does not collect in front of the air supply port.

  As described above, in the air conveyance device according to the present invention, the air supply pipe can be advanced and retracted immediately below the conveyance object supply port. Therefore, even when conveying different types of conveyance objects by air, the air conveyance apparatus is directly below the conveyance object supply port. The amount of air supply pipe in the direction can be adjusted so that the most suitable amount of transported goods can be supplied in front of the air supply port of the air supply pipe. Each conveyed product can be smoothly pneumatically conveyed.

  Note that, in the air conveyance device according to the present invention, the air conveyance is performed by suction from the terminal end side of the air conveyance path or by the blast from the start end side of the air conveyance path. In the case of performing by suction, outside air is simply taken in from the air supply pipe, and in the case of performing by a blast, the air supply pipe is forced to use a pump or the like. Outside air will be sent to. In addition, the air supply pipe can be mechanically advanced and retracted using a cylinder or the like, or can be manually advanced and retracted.

  Further, it is desirable that the air supply pipe is configured to slide along the bottom wall of the air conveyance path in the air conveyance path, and by this configuration, the air supply pipe has fallen into the air conveyance path. Air can be applied to the conveyed product from below, and the conveyed product can be lifted so that it can be easily conveyed by air. Moreover, the conveyed product does not enter the lower portion of the air supply pipe and remain without being conveyed by air.

  In addition, as described above, it is desirable that the air conveyance pipe is capable of moving back and forth outside the air conveyance device, rather than being able to advance and retreat only directly below the conveyed product supply port. Even if the debris derived from the transported object adheres to the air supply pipe as dirt, or the air supply pipe is damaged by contact with the transported object that has dropped from the transported object supply port, the air supply pipe It can be easily maintained by moving it outside the air conveyance path. In this way, if the air supply pipe can be withdrawn to the outside of the air conveyance device, it is not necessary to disassemble the air conveyance device and take out the air supply tube in order to maintain the air supply tube, and contact with the conveyed product is eliminated. Many air supply pipes that require frequent maintenance can be easily maintained.

  In addition, when the air supply pipe is withdrawn to the outside of the air conveyance device by, for example, forming the inlet / outlet of the air supply tube in the air conveyance device to a minimum size that allows the air supply tube to pass through, If the air supply pipe is withdrawn while being in contact, when the air supply pipe withdraws to the outside of the air conveyance path, dirt such as debris adhering to the outer peripheral surface of the air supply pipe is scraped off at the edge of the inlet / outlet and automatically Thus, the air supply pipe is cleaned, and the labor required for cleaning the air supply pipe can be saved.

  In particular, when the transported object is grains such as rice and beans, the waste that is derived often contains moisture such as straw and skin, and the air supply pipe is easily contaminated. Thus, the air supply pipe can be maintained. In addition, the air conveyance apparatus which concerns on this invention can convey not only the grain mentioned above but various substances, and can carry out air conveyance of a granular material suitably especially.

The air supply tube, it is operatively connected to the shutter for opening and closing the transport substance supply port. For example, when the shutter is opened and the conveyed product supply port is opened, the air supply pipe advances to the end of the air conveyance path and moves directly below the conveyed product supply port, and conversely, the shutter is closed and conveyed. When the object supply port is closed, the air supply pipe is retracted toward the start end side of the air conveyance path and is retreated to the outside of the air conveyance device.

  With this configuration, it is possible to save the trouble of separately operating the opening and closing of the shutter and the advance and retreat of the air supply pipe, and the shutter and the air supply pipe are driven by the same drive source, and both are required for driving. Cost can be reduced.

  In particular, as described above, the opening of the shutter is interlocked with the advancement of the air supply pipe directly below the conveyed product supply port, and the shutter is closed and the air supply pipe exits to the outside of the air conveyance device. When the transport object supply port is opened and the transport object is supplied into the air transport path, the air supply pipe automatically enters the air transport path so that the air is effectively discharged. When the product is supplied into the air conveyance path and the conveyed product supply port is closed and the conveyed product is not supplied into the air conveyance path, the air supply pipe automatically exits from the air conveyance path, and the air supply pipe is maintained. Easy state. Therefore, the state of the air transfer device can be quickly switched from the state during air transfer to the state during non-air transfer.

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

  FIG. 1 is an overall explanatory view of an air transfer device A which is an embodiment of an air transfer device according to the present invention. As shown in the drawing, an air conveyance device A of the present embodiment includes a conveyance object supply unit 1, an air conveyance path 2 that conveys a conveyance object a supplied from the conveyance object supply unit 1, and an air conveyance path 2. An air supply unit 3 for supplying air to the air and a transported material receiving unit 4 for receiving the transported material a transported by air through the air transport path 2.

  As shown in FIGS. 2 to 4, the conveyed product supply unit 1 includes a supply hopper 5 that supplies the stored conveyed product a to the air conveyance path 2, and the lower end portion of the supply hopper 5 has a cylindrical shape. Are communicated with the top wall of the start end portion 2a of the air conveyance path 2 formed at the top. This communicating portion serves as a conveyed product supply port 6 for supplying the conveyed product a to the air conveyance path 2, and a shutter 7 for opening and closing the conveyed product supply port 6 is slidable in the conveyed product supply port 6. It is attached to.

  The shutter 7 is a flat plate having an opening 7a at the center, and the shutter 7 slides toward the start end 2a side of the air conveyance path 2 so that the opening 7a overlaps the conveyed product supply port 6 vertically. Then, the conveyed product supply port 6 is opened. On the other hand, when the shutter 7 slides to the end portion 2b side of the air conveyance path 2 and the opening 7a does not overlap the conveyance object supply port 6, the conveyance object supply port 6 is closed. Thus, the opening width of the conveyed product supply port 6 is adjusted by the shutter 7.

  The air conveyance path 2 is formed in a cylindrical shape having openings at both ends, and the opening on the start end 2a side is an entrance / exit 8 of an air supply pipe 10 to be described later, as shown in FIGS. The air supply pipe 10 is formed in such a size that the outer peripheral surface of the air supply pipe 10 comes into contact with the air supply pipe 10 while the opening on the terminal end 2b side is as shown in FIGS. 5 (a) and 5 (b). In addition, the conveyed product a that has been conveyed by air becomes the inlet 9 into which the conveyed product receiving unit 4 flows. In the following description, the start end 2a side of the air conveyance path 2 is referred to as upstream, and the end 2b side is referred to as downstream.

  As shown in FIGS. 2 to 4, the air supply unit 3 includes an air supply pipe 10 that can advance and retreat into and out of the air conveyance path 2 through the doorway 8 of the air conveyance path 2, and the air supply pipe 10. It consists of a cylinder 11 that drives forward and backward. The air supply pipe 10 has a cylindrical shape with a tip opening, and the opening becomes an air supply port 12. Further, the cylinder 11 is attached to the base end portion of the air supply pipe 10, and an outside air intake port 13 is provided on the peripheral wall. And when entering the inside of the air conveyance path 2, it enters from the front end part side where the air supply port 12 is provided, and when retreating, it completely exits outside the air conveyance path 2 to the front end part. be able to. In the air conveyance path 2, the air supply pipe 10 is in contact with the bottom wall of the air conveyance path 2 and slides along the bottom wall.

  Further, an interlocking piece 23 extended from the shutter 7 is attached to the air supply pipe 10, and when the air supply pipe 10 advances in the direction of the end portion 2b of the air conveyance path 2, the shutter 7 also conveys air in conjunction therewith. When the air supply pipe 10 moves backward in the direction of the start end portion 2a of the air conveyance path 2, the opening 7a overlaps with the conveyed product supply port 6 as described above. Then, the shutter 7 also slides in the direction of the starting end 2a of the air conveyance path 2, and the opening 7a moves away from the position where it overlaps the conveyed product supply port 6.

  In particular, in this embodiment, when the front end of the air supply pipe 10 is located immediately below the downstream end of the transported object supply port 6, the opening 7a of the shutter 7 and the transported object supply port 6 are completely connected. When the leading end of the air supply pipe 10 is located immediately below the upstream end of the transported object supply port 6, that is, here, the opening width of the transported object supply port 6 is maximized. When the tip of the air supply pipe 10 is located at the entrance / exit 8 of the air conveyance path 2, the opening 7a of the shutter 7 is completely removed from the conveyance object supply port 6, and the conveyance object supply port 6 is completely closed. I try to do it.

  Moreover, the tip of the air supply pipe 10 is arranged immediately below the downstream end of the opening 7a provided in the shutter 7, and when the transported object supply port 6 is opened, the transported object supply port The air supply pipe 10 is always arranged immediately below the air conditioner 6.

  As described above, in this embodiment, the air supply pipe 10 and the shutter 7 are interlocked and connected so that the air supply pipe 10 moves forward and backward just below the conveyed product supply port 6 as the shutter 7 is opened and closed. Yes.

  As shown in FIGS. 5 (a) and 5 (b), the conveyed product receiving portion 4 includes a receiving hopper 14 connected to the end portion 2 b of the air conveying path 2, and inside the receiving hopper 14. The decelerating mechanism 15 for decelerating the moving speed of the conveyed product a flowing into the receiving hopper 14 from the inlet 9 of the air conveying path 2 is housed. A suction mechanism 16 for sucking air inside the air conveyance path 2 and the receiving hopper 14 is connected to the upper end portion of the receiving hopper 14, and the receiving hopper 14 is connected to the outer side from the receiving hopper 14. A rotary valve 17 for adjusting the discharge of the conveyed product a is connected.

  The speed reduction mechanism 15 is disposed on the side of the terminal end 2b of the air conveyance path 2 and flows horizontally from the inlet 9 of the terminal end 2b of the air conveyance path 2 into the receiving hopper 14. A rotary shaft that extends in the front-rear direction in which the first receiving blade 18 and the second receiving blade 19 that receive the conveyed product a and drop downward are rotated in the same direction as the inflow direction of the conveyed product a from the air conveying path 2. Each of the 20 has a structure in which a plurality of sheets are attached over one circumference. Here, both the first receiving blade 18 and the second receiving blade 19 are attached to the rotating shaft 20 at predetermined intervals along the rotation direction.

  In addition, the first receiving blade group 21 including the first receiving blades 18 provided in a plurality along the rotation direction and the second receiving blade 19 including the plurality of first receiving blades 19 along the rotation direction as described above. The two receiving blade groups 22 are arranged side by side with respect to the rotary shaft 20 so that the second receiving blade 19 is disposed between the first receiving blades 18 that are continuous when viewed from the front. Yes. In the figure, 20a is a bearing.

  The first receiving blade 18 and the second receiving blade 19 are based on the moving speed (flow velocity) of the conveyed product a during air transfer, that is, the inflow speed from the air transfer path 2 to the inside of the receiving hopper 14. Is rotating at a low rotational speed (circumferential speed). For example, when the moving speed of the conveyed product a during air conveyance is 10 m per second, the first receiving blade 18 and the second receiving blade 19 are rotated at 5 m per second.

  In the present embodiment, as described above, when any one of the first receiving blade 18 and the second receiving blade 19 attached around the rotating shaft 20 is positioned directly above the rotating shaft 20. The terminal end 2b of the air conveyance path 2 is communicated with the receiving hopper 14 so that the center of the inlet 9 of the air conveyance path 2 is at a height that is approximately 1/3 from the tip of the receiving blade. As a result, the conveyed product a flowing into the receiving hopper 14 from the inlet 9 of the terminal end 2b of the air conveying path 2 passes over the first receiving blade 18 and the second receiving blade 19. Therefore, the conveyed product a can be reliably received by the first receiving blade 18 and the second receiving blade 19.

  The first receiving blade 18 has a shape in which a flat plate is twisted from a base end perpendicular to the rotation direction to a tip inclined at 45 degrees with respect to the rotation direction. The surface 18a is inclined obliquely with respect to the rotation direction.

  In addition, the second receiving blade 19 has a shape in which a flat plate is twisted from a base end portion parallel to the rotation direction to a tip portion inclined by 45 degrees with respect to the rotation direction. Similarly to the receiving blade 18, the receiving surface 19 a of the conveyed product a is inclined obliquely with respect to the rotation direction.

  Moreover, the first receiving blade 18 and the second receiving blade 19 are inclined in different directions, and one end of the first receiving blade 18 is directed to the receiving surface 19a of the second receiving blade 19, One side end of the second receiving blade 19 is directed to the receiving surface 18 a of the next first receiving blade 18. In particular, in the present embodiment, the first receiving blade 18 and the second receiving blade 19 are twisted at 45 degrees with respect to the base end portion, respectively, so that the first end disposed at a right angle at the base end portion. The receiving blade 18 and the second receiving blade 19 are also arranged at right angles to each other at the tip.

  The air conveying apparatus A of the present embodiment has the above-described configuration, and operates as follows when conveying the conveyed product a by air.

  As shown in FIG. 2A, when air is not being conveyed, the air supply pipe 10 is drawn out of the air conveyance path 2 by the cylinder 11, and the shutter 7 linked to the air supply pipe 10 is also air-conveyed. Moving to the start end 2a side of the path 2, the conveyed product supply port 6 is closed.

  As shown in FIG. 2B, when the cylinder 11 is driven and the air supply pipe 10 is made to enter the inside of the air conveyance path 2, the shutter 7 is also slid to the end portion 2b side of the air conveyance path 2 at the same time. Then, the conveyed product supply port 6 is opened. Accordingly, the conveyed product a is supplied to the air conveying path 2 from the receiving hopper 14 through the conveyed product supply port 6. Here, rice is used as the conveyed product a. At this time, the conveyed product a flowing down from the receiving hopper 14 to the air conveying path 2 is deposited above the air supply pipe 10 located immediately below the conveyed product supply port 6, and from there, the air supply pipe 10 The material a slides forward, and the conveyed product a also accumulates in front of the air supply port 12 of the air supply pipe 10.

  In particular, in FIG. 2 (b), the air supply pipe 10 is made to enter the inside of the air conveyance path 2 just below the end on the downstream side of the conveyed product supply port 6. The transported object a does not accumulate at a height equal to or higher than the inner diameter of the air transport path 2. In addition, since only the transported object a slipped from above the air supply pipe 10 is deposited in front of the air supply port 12, the deposition width is limited.

  Therefore, when the suction mechanism 16 is driven to supply air from the air supply pipe 10 to the inside of the air conveyance path 2 to generate an air flow toward the terminal end 2b of the air conveyance path 2, FIG. ), The conveyed product a in front of the air supply port 12 can be easily conveyed by air. Further, when the air conveyance is started in this way, the conveyed product a is supplied to the inside of the air conveyance path 2 at any time and is conveyed in the direction of the terminal end 2b of the air conveyance path 2.

  As described above, the air supply pipe 10 is not only allowed to enter directly below the downstream end of the conveyed product supply port 6, but also as illustrated in FIG. 3, depending on the type of the conveyed product a. It is also possible to stop entry at an appropriate position directly below the supply port 6. As described above, in the air conveyance device A of the present embodiment, the air supply pipe 10 can be advanced and retracted immediately below the conveyance object supply port 6, so that it is directly below the conveyance object supply port 6 according to the type of the conveyance object a. Thus, the amount of the air supply pipe 10 entering can be adjusted, and an appropriate amount of the conveyed product a can be supplied in front of the air supply port 12 of the air supply pipe 10.

  Further, as shown in FIG. 4 (a), even if dirt b such as debris derived from the conveyed product a conveyed by air adheres to the outer peripheral surface of the air supply pipe 10 after the completion of the air conveyance, FIG. As shown in the figure, when the cylinder 11 is driven and the air supply pipe 10 is pulled out to the outside of the air conveyance path 2 again, when the air supply pipe 10 passes through the doorway 8, the dirt b is scraped off at the edge of the doorway 8. The air supply pipe 10 can be automatically cleaned by being dropped. In addition, when the air supply pipe 10 is pulled out, the shutter 7 is automatically moved to the start end 2a side of the air conveyance path 2 and the conveyed product supply port 6 is closed again. There is no need to perform an operation to close the shutter 7 separately. The dirt b scraped off in this way is air-transferred to the end portion 2b of the air-conveying path 2 by driving the suction mechanism 16 again to generate an air flow in the air-conveying path 2 and air. It can be discharged from the transport device A.

  On the other hand, in the conveyed product receiving unit 4 at the air conveyance destination, when the air conveyance is started, as shown in FIG. 5B, the rotary shaft 20 is rotated by a drive motor or the like, so that the first receiving blade 18 And the second receiving blade 19 is rotated in a direction opposite to the end portion 2b of the air conveyance path 2 (counterclockwise in FIG. 5B), and is introduced into the receiving hopper 14 from the inlet 9 of the end portion 2b. The inflowing conveyed product a is received by the receiving surface 18 a of the first receiving blade 18. At this time, since the first receiving blade 18 that receives the conveyed product a rotates in the same direction as the inflow direction of the conveyed product a that has flowed in from the inflow port 9, the conveyed product a is the first receiving blade 18. The impact when it hits the receiving surface 18a can be reduced. Moreover, since the conveyed product a flows in from the inflow port 9 in the horizontal direction, the moving speed of the conveyed product a in the horizontal direction is reduced by its own weight, and this also impacts the conveyed product a when it hits the receiving blade. Can be relaxed.

  As shown in FIG. 5 (a), the conveyed product a received by the receiving surface 18a of the first receiving blade 18 flows on the receiving surface 18a in the direction of rotation of the first receiving blade 18 along an inclination. The first receiving blade 18 is moved from the side end portion to the receiving surface 19a of the second receiving blade 19 facing the same end portion and is received. The conveyed product a received by the receiving surface 19a of the second receiving blade 19 flows along the inclination on the receiving surface 19a in the rotation direction of the second receiving blade 19, and the second receiving blade 19 It moves from the side end to the receiving surface 18a of the new first receiving blade 18 facing the same side end and is received.

  Thus, since the receiving surfaces 18a and 19a of both the first receiving blade 18 and the second receiving blade 19 are inclined with respect to the rotation direction, the conveyed object a that collides with the receiving surfaces 18a and 19a is received by the receiving surface. It will escape diagonally along 18a and 19a, and it will not only be easy to deliver the conveyed product a to the next receiving blade, but also the impact when the conveyed product a hits the receiving blade can be further reduced.

  Moreover, by repeating the delivery of the conveyed product a from the first receiving blade 18 to the second receiving blade 19 and from the second receiving blade 19 to the next first receiving blade 18, the conveyed product a is renewed. The moving speed of the conveyed product a can be gradually reduced from the moving speed at the time of air conveyance every time it is received by the receiving blades, and the conveyed product a can be dropped downward when it is finally sufficiently decelerated. Therefore, it is possible to prevent the conveyed product a from colliding with the inner wall surface of the receiving hopper 14 or the like at the moving speed at the time of air conveyance and damaging the conveyed product a.

  In particular, in the present embodiment, as described above, the end portion 2b of the air conveyance path 2 is disposed at a height that is approximately 1/3 from the tip of the receiving blade positioned directly above the rotating shaft 20, so The conveyed product a flowing into the hopper 14 hits a portion close to the tip of the first receiving blade 18, and the received material a is received as described above until the conveyed product a leaves the receiving blade and falls downward. The conveyed product a can be delivered from the blade to the receiving blade.

  In addition, since the 1st receiving blade 18 and the 2nd receiving blade 19 are receiving the conveyed product a, rotating, the conveyed product a substantially falls below, hitting 2-4 receiving blades. It will be. Then, the fallen conveyed product a accumulates in the lower portion of the receiving hopper 14 and is discharged to the outside through the rotary valve 17.

1 is an overall explanatory diagram of an embodiment of an air conveyance device according to the present invention. It is a partial cross section explanatory drawing by the front view of the air conveyance apparatus in the embodiment, (a) is a state where the conveyed product supply port was closed, (b) is a state where the conveyed product supply port was opened, ( c) shows a state in which air conveyance is started. It is a partial cross section explanatory view by the front view of the air conveyance apparatus in the embodiment. It is a partial cross section explanatory drawing by the front view of the air conveyance apparatus in the embodiment, (a) shows the state where dirt adhered to the air supply pipe, (b) shows the state where dirt was removed from the air supply pipe ing. It is a partial cross-section explanatory drawing of the conveyed product receiving part in the embodiment, (a) is a partial cross-sectional explanatory drawing by planar view, (b) is a partial cross-sectional explanatory drawing by front view.

Explanation of symbols

A Air transport device a Transported object 1 Transported object supply unit 2 Air transport path
2a Start end
2b Termination part 3 Air supply part 4 Conveyance object receiving part 5 Supply hopper 6 Conveyance object supply port 7 Shutter
7a Opening 8 Entrance 9 Entrance
10 Air supply pipe
11 cylinders
12 Air supply port
13 Inlet

Claims (4)

In an air conveyance apparatus in which an air supply path for supplying air from an air supply port at the tip to the air conveyance path is disposed in an air conveyance path for air conveyance of a conveyance object supplied from a conveyance object supply port.
An air conveyance device characterized in that the air supply pipe is linked to a shutter that opens and closes the conveyance object supply port, and is disposed so as to be able to advance and retreat immediately below the conveyance object supply port.   The air conveyance device according to claim 1, wherein the air supply pipe is capable of withdrawing to the outside of the air conveyance device.   The air conveyance device according to claim 2, wherein the air supply pipe retreats while contacting an entrance / exit to the air conveyance device. The air conveyance device according to any one of claims 1 to 3, wherein the air supply pipe slides along a bottom wall of an air conveyance path .

Images