JP2006016150A - Bucket type granule conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bucket type granule conveying device capable of efficiently discharging residual granules in a short time. <P>SOLUTION: In the bucket type granule conveying device for scooping and conveying granules charged into a scooping unit 6 by a plurality of buckets 1 to be successively inverted and moved from a downward path d to an upward path u, an injection control means 17 to control the start and stop of injection of compressed air from an air nozzle 13 for discharging residual granules by opening/closing an injection valve 16 has a configuration in which the injection operation to inject compressed air A only for the set injection time Ta1 for 1-6 seconds is repeated for a plurality of set times N1 while interposing the stop operation to stop the injection of compressed air only for the set stop time Tb1 between the continuous injection operations. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  More specifically, the present invention relates to a bucket-type granule conveying apparatus used for grain lifting and the like, and more specifically, a plurality of particles that are sequentially reversed from a descending path to an ascending path in the harvesting section. The present invention relates to a bucket-type granular material conveying device that picks up and conveys the material with a bucket of the size.

  In the bucket type granular material conveying device as described above, when there is no gap between the bottom surface of the scraping unit and the bucket and no granular material is charged into the scraping unit, In many cases, residual grains remain on the bottom surface of the harvesting part without being completely removed, but in order to discharge the residual grains, residual grains that inject compressed air onto the bottom surface of the harvesting part. There is an apparatus equipped with a discharge air nozzle and performing a residual particle discharge operation in which compressed air is repeatedly injected from a residual particle discharge air nozzle while driving a bucket at the end of particle conveyance.

  That is, in this apparatus, the particles remaining on the bottom surface of the scraping unit are floated by jetting compressed air from the air nozzle, and the floated particles are scooped by the bucket and sent to the transport destination, so that in the scraping unit Drain residual grains.

  Conventionally, in this type of apparatus, for example, the first to third air nozzles (three kinds of air nozzles having different equipment positions in the bucket moving direction) connected to a common compressor are shown in FIG. In such an operation form, a configuration in which compressed air is repeatedly ejected onto the bottom surface of the scraping unit has been adopted (see Patent Document 1).

JP-A-4-223909

  However, in the residual particle discharging operation by the above-described conventional apparatus, the residual particle discharging efficiency for discharging the residual particles from the harvesting unit (that is, the efficiency of floating the residual particles and scooping them into the bucket) is low, and the residual particles in the harvesting unit are low. There was a problem that it took a long time to reduce the grains to the target amount.

  In view of this situation, the main problem of the present invention is to effectively solve the above problem by rational improvement.

[1] A first characteristic configuration of the present invention relates to a bucket type particle conveying device,
In the configuration of scooping and transporting the granules put into the scooping section with a plurality of buckets that reversely move sequentially from the descending path to the ascending path in the scooping section,
An air nozzle for discharging residual particles for injecting compressed air to the bottom surface of the scraping unit, an injection valve for opening and closing an air supply path from the compressor to the air nozzle, and opening and closing the injection valve An injection control means for performing start / stop control of compressed air injection from the air nozzle,
When this injection control means is given a start command for residual grain discharge operation,
The injection operation for injecting compressed air from the air nozzle for a set injection time of 1 second to 6 seconds is set a plurality of times, and the compressed air injection from the air nozzle is stopped for a set pause time between each injection operation. The configuration is such that it is repeatedly executed with a pause operation interposed.

  In other words, in the injection operation in which the injection valve is opened and the compressed air is injected from the air nozzle for discharging residual particles, when the injection valve is opened, the high closing that has been accumulated upstream of the injection valve until then. The large pressure generated by the open cut-off pressure (that is, the air pressure that stands on the upstream side of the injection valve in the air supply path when the injection valve is closed under the operation of the compressor). Compressed air is injected from the air nozzle by force, but then the air pressure upstream of the injection valve is the open pressure (that is, steady air in the air supply path when the injection valve is open under compressor operation) Pressure), and accordingly, the compressed air injection force from the air nozzle also decreases to a certain stable value.

  And the efficiency of the residual grain discharge which floats the residual grain in the bottom face of the harvesting part and scoops it up in the bucket (especially, the residual grain is still large and the residual grains which are in an accumulated state on the bottom face of the harvesting part are scattered at once. As for the residual particle discharge efficiency on the surface that is lifted in the form and scooped up by the bucket), a large amount of residual particles that are encouraged to float due to the large inertial force at the start of injection are followed by compressed air injection High residual particle discharge efficiency is obtained at a certain initial time when the bucket is lifted so that it can be scooped by the bucket, but after that, even if compressed air injection is continued, injection due to pressure drop to the open pressure already Research has shown that only a low residual particle discharge efficiency can be obtained by reducing the effect of breaking down the static inertia of residual grains (especially the large static inertia of the residual grain accumulation group) by reducing the force.

  Although there are differences depending on the capacity of the compressor, the pipe diameter and length of the pipe forming the air supply path, the presence or absence of the compressed air tank, the initial time is approximately 1 second to 6 seconds (mainly From 3 to 4 seconds).

  In this regard, in the above-described conventional apparatus in which the compressed air is injected from the air nozzle in each injection operation for a much longer time than the initial time, the compression in a state where the residual particle discharge efficiency has already decreased in each injection operation. This is an operation mode in which air injection (that is, compressed air injection after the initial time elapses) is inadvertently continued over a long period of time. This is the reason why the residual particle discharge efficiency (average efficiency) of the entire residual particle discharge operation is caused. ) Is low, and it takes a long time to reduce the residual grains in the harvesting section to the target amount.

  On the other hand, according to the first feature configuration, since the compressed air is injected from the air nozzle for the set injection time of 1 second to 6 seconds in each injection operation in the residual particle discharging operation based on the above research, the injection start time From the above, it is possible to effectively avoid inadvertent continuation of compressed air injection in a state where the residual particle discharge efficiency has already been reduced, while ensuring the high residual particle discharge efficiency obtained at the initial time from It is possible to effectively increase the residual particle discharge efficiency as a whole of the residual particle discharge operation, and to effectively reduce the time required to reduce the residual particles in the towing section to the target amount. Increased efficiency also makes it possible to reduce the compressor capacity.

  In addition, when the initial time can be specified in the actual use device, it is desirable to perform each injection operation using the specified initial time as the set injection time, but in general, in order to specify the initial time in the actual use device. Since a lot of time and labor are required for the measurement work, if the set injection time is appropriately selected from the range of 1 second to 6 seconds in the implementation of the first characteristic configuration, the initial time is greatly determined. It is possible to reliably obtain a certain effect in terms of improving the residual particle discharge efficiency while eliminating unnecessary time and labor. Desirably, the set injection time is preferably selected from the range of 3 seconds to 4 seconds.

  In the implementation of the first characteristic configuration, the set injection time in each injection operation does not necessarily have to be the same time, and the injection operations with different set injection times may be executed.

[2] A second characteristic configuration of the present invention relates to a bucket-type granule conveyance device,
In the configuration of scooping and transporting the granules put into the scooping section with a plurality of buckets that reversely move sequentially from the descending path to the ascending path in the scooping section,
An air nozzle for discharging residual particles for injecting compressed air to the bottom surface of the scraping unit, an injection valve for opening and closing an air supply path from the compressor to the air nozzle, and opening and closing the injection valve An injection control means for performing start / stop control of compressed air injection from the air nozzle,
This injection control means
After the closing operation of the injection valve from the open state, the pressure recovery time required for the air pressure upstream of the injection valve in the air supply path to recover from the open pressure up to the closing pressure is recovered. 1 to 3 times as the set pause time,
When an instruction to start the residual particle discharge operation is given, an injection operation for injecting compressed air from the air nozzle for a set injection time is set a plurality of times, and from the air nozzle for a set pause time between each injection operation. In other words, the operation is repeatedly executed in a state where a pause operation for stopping the compressed air injection is interposed.

  That is, in the pause operation in which the injection valve is closed and the compressed air injection from the air nozzle for discharging the residual particles is stopped, after the closing operation from the open state of the injection valve, the upstream side of the injection valve in the air supply path The pressure recovery time required for the side air pressure to rise and recover from the previous open pressure to the closed pressure depends on the compressor capacity, the diameter and length of the pipe that forms the air supply path, Although there is a difference depending on the presence or absence of clothing, research has revealed that the time is as short as 2 seconds, for example.

  In this regard, in the above-described conventional apparatus in which the compressed air injection from the air nozzle is stopped for a long time of 10 seconds to several tens of seconds in the pause operation interposed between the injection operations, the air pressure on the upstream side of the injection valve In order to prepare for the next injection operation to recover to the closing pressure, the residual particles that have been levitated by the previous injection operation and that have not been scooped up by the bucket are Even if the time required to return to the bottom surface of the harvesting part through the above (that is, the time to prevent the next injection operation from being performed idly before the residual grains do not return) is taken into consideration. In operation, the compressed air injection from the air nozzle is stopped for a longer time than necessary, and this waste of time becomes one of the factors that lower the residual particle discharge efficiency as a whole of the residual particle discharge operation. , Was to take a long time to reduce the residual grains in Kikuto unit to the target amount.

  On the other hand, according to the second characteristic configuration, based on the above research, the set pause time (that is, the duration of one pause operation) for stopping the compressed air injection from the air nozzle by the pause operation is set to the injection valve. After the closing operation from the open state, the pressure return time required for the air pressure upstream of the injection valve in the air supply path to recover from the previous opening pressure to the closing pressure is 1 to 3 times longer Therefore, in the pause operation, the air pressure upstream of the injection valve is reliably increased and recovered to the closing pressure, and among the residual particles that have floated in the previous injection operation, residual particles that have not been scooped up by the bucket While ensuring a sufficient time to return to the bottom surface of the scraping section, it is possible to effectively suppress the waste of time for stopping the compressed air injection from the air nozzle for a longer time than necessary. Overall discharge operation The residual grain discharge efficiency can be effectively increased, and the time required to reduce the residual grain to the target amount can be effectively shortened. The capacity of the machine can also be reduced.

  In addition, if the first feature configuration is carried out in parallel with the implementation of the second feature configuration, it is possible to effectively avoid inadvertent continuation of compressed air injection when the residual particle discharge efficiency has already been reduced in each injection operation. Both the effect of the first feature configuration that can be performed and the effect of the second feature configuration that can effectively suppress the waste of time for stopping the compressed air injection from the air nozzle for a longer time than necessary in the pause operation. The residual particle discharge efficiency as a whole of the particle discharge operation can be further effectively increased.

  When the injection operation is repeated three times or more in the residual particle discharging operation, in the implementation of the second feature configuration, the set pause time in each pause operation does not necessarily have to be the same time, and the pause operations with different set pause times are different. May be executed.

[3] A third characteristic configuration of the present invention relates to a bucket-type granular material conveying device,
In the configuration of scooping and transporting the granules put into the scooping section with a plurality of buckets that reversely move sequentially from the descending path to the ascending path in the scooping section,
An air nozzle for discharging residual particles for injecting compressed air to the bottom surface of the scraping unit, an injection valve for opening and closing an air supply path from the compressor to the air nozzle, and opening and closing the injection valve An injection control means for performing start / stop control of compressed air injection from the air nozzle,
This injection control means
After the closing operation of the injection valve from the open state, the pressure recovery time required for the air pressure upstream of the injection valve in the air supply path to recover from the open pressure up to the closing pressure is recovered. 1 to 3 times as the set pause time, and 1/3 to 3 times as long as the pressure return time as the set injection time,
When an instruction to start the residual particle discharge operation is given, the injection operation for opening the injection valve for the set injection time is set a plurality of times, and the injection valve is set for the set pause time between each injection operation. The configuration is such that it is repeatedly executed in a state where a pause operation for closing the valve is interposed.

  That is, as described above, the initial time when high residual particle discharge efficiency is obtained after the start of injection is approximately 1 second to 6 seconds. However, after the injection valve is opened, the air pressure upstream of the injection valve is closed. For devices that take a long time to drop from the pressure to the open pressure (ie, the time during which a large jet power is maintained) and have a long initial time, the pressure recovery time generally tends to be long. Research has shown that the initial time is approximately 1/3 to 3 times the pressure recovery time.

  Therefore, according to the third characteristic configuration in which the compressed air is injected from the air nozzle for the set injection time that is 1/3 times to 3 times the pressure return time in each injection operation, as in the first characteristic configuration, from the injection start time point. While ensuring the high residual particle discharge efficiency obtained at the initial time, it is possible to effectively avoid inadvertent continuation of compressed air injection when the residual particle discharge efficiency has already been reduced. Since the set injection time is selected based on the ratio to the pressure recovery time having the above correlation, the set injection time that further matches the actual initial time can be easily selected.

  In addition, according to the third feature configuration, since the set pause time for stopping the compressed air injection from the air nozzle by the pause operation is set to a time that is 1 to 3 times the pressure return time, In the resting operation, the air pressure upstream of the injection valve is reliably increased and recovered to the closing pressure, and the residual particles that have floated up in the previous injection operation and that have not been scooped up by the bucket are It is possible to effectively prevent time wasted for stopping the compressed air injection from the air nozzle for a longer time than necessary, while ensuring a sufficient time to return to the above. For example, it is possible to effectively increase the residual particle discharge efficiency as a whole of the residual particle discharge operation, at the same level as or more than the case where the first and second characteristic configurations are carried out in parallel. Decrease to the amount It is possible to shorten the time required for effectively.

  In the implementation of the third characteristic configuration, the set injection time in each injection operation does not necessarily have to be the same time, and the injection operation with different set injection times may be executed. When the injection operation is repeated three or more times during driving, the set pause time in each pause operation does not necessarily have to be the same time, and the pause operations with different set pause times may be executed.

  In the implementation of the first to third characteristic configurations, the air nozzle is one that injects compressed air from the bucket descending path side, one that injects compressed air from the bucket ascending path side, or from the side of the bucket moving path It may be any one that injects compressed air, and the injection direction may be either a direction that is oblique to the bottom surface of the torsion part, a direction that is orthogonal, or a direction along the bottom surface of the torsion part. However, it is desirable to arrange a nozzle that injects compressed air toward the bottom of the bottom surface of the scooping portion in a state of being along the bottom surface of the scooping portion from the bucket lowering path side.

  In the implementation of the first to third characteristic configurations, the number of air nozzles may be either singular or plural.

[4] The fourth characteristic configuration of the present invention specifies a preferred embodiment in the implementation of any of the first to third characteristic configurations.
A plurality of the air nozzles for injecting compressed air to different parts of the bottom surface of the scraping unit are provided,
A plurality of the injection valves for switching the plurality of air nozzles separately between a compressed air injection state and an injection stop state by separately opening and closing an air supply path from a common compressor for each of the plurality of air nozzles,
Of the plurality of injection valves, the injection control means sequentially or alternately changes an injection valve that is a target of a set of operations of one injection operation and a subsequent pause operation. In this form, the injection operation is repeatedly executed over a set number of times.

  In other words, when equipped with a plurality of air nozzles that share a compressor as air nozzles for discharging residual particles, if a plurality of air nozzles are simultaneously injected, a plurality of compressed air supplied from the common compressor is provided. By being dispersed and jetted from the air nozzles, the compressed air jetting force from the air nozzles is reduced, and this causes a drop in residual particle discharge efficiency.

  On the other hand, according to the fourth characteristic configuration, an injection valve that is an operation target of a set of operations of one injection operation and a subsequent pause operation is set to a plurality of injection valves (that is, a plurality of air valves). The injection operation is repeated in a form that is changed sequentially or alternately among the different injection valves for the nozzles), and while adopting a form in which compressed air is supplied from a common compressor to a plurality of air nozzles, As a whole of the residual particle discharge operation, while a plurality of air nozzles are effectively operated, it is possible to avoid a decrease in injection force due to the dispersion of compressed air to the plurality of air nozzles. Improvement of grain discharge efficiency can be achieved more effectively.

[First Embodiment]
FIG. 1 shows a bucket-type granular material conveying device used for rice lifting. An endless rotating belt 2 in which a large number of buckets 1 are arranged and attached to the outer periphery is connected to an upper pulley 4 at the upper end of the case inside a vertically long case 3. The case 3 is wound around the lower pulley 5 at the lower end of the case, and a lower end portion of the case 3 is provided with a feeding hopper 7 for putting rice into the scraping portion 6 at the bottom of the case. A discharge hopper 8 for discharging rice is provided.

  That is, by rotating the belt 2 by the motor 9, the rice put into the case from the making hopper 7 is scooped up by the bucket 1 which reversely moves in the reverse direction from the descending path d to the ascending path u in the towing unit 6. The lifted rice is discharged and discharged to the discharge hopper 8 in the form of being thrown along with the reverse movement of the bucket 1 from the rising path u to the lowering path d at the upper end of the case.

  As shown in FIGS. 2 and 3, hopper mounting openings 10 and 11 for selectively mounting the charging hopper 8 are formed at the lower end portion of the case 3 on the lowering path d side and the rising path u side of the bucket 1, respectively. However, in the present apparatus, a charging hopper 8 is attached to the hopper mounting opening 10 on the bucket ascending path u side to make a so-called back-in type apparatus, and the hopper mounting opening 11 on the bucket descending path d side is closed by a lid 12. In addition, an air nozzle 13 for discharging residual particles is attached to the lid 12.

  That is, by attaching an air nozzle 13 for discharging residual particles to a detachable lid 12 that closes one hopper mounting opening 11, residual particles can be discharged to an existing apparatus without providing a dedicated new nozzle mounting opening. The air nozzle 13 can be easily equipped with a method.

  The bottom surface 6a (that is, the bottom surface inside the case 3) of the take-up portion 6 has an arcuate cross-sectional shape along the rotation trajectory of the bucket 1 that reversely moves from the descending path d to the ascending path u. The air nozzle 13 is formed in the width direction of the bucket movement path (the rotational axis of the pulley 5). In the state where the injection tube 13a is penetrated from the outside of the case to the inside of the case at the center of the case (in the core direction), and when the lid 12 is attached to the case 3, the injection tube 13a is inclined to the arc-shaped bottom surface 6a of the scraping portion 6 The lid 12 is attached so as to be in an obliquely downward posture along the portion.

  That is, by this nozzle arrangement, from the tip injection port 13b of the air nozzle 13 toward the bottom surface 6a of the scraping portion 6 along the inclined portion of the bottom surface 6a, from the bucket descending path d side toward the bottom of the bottom surface 6a. Thus, the compressed air A is injected.

  In addition, a bending portion 13c that lowers the tip side is formed in the middle of the injection pipe 13a in the air nozzle 13, so that the air nozzle 13 is attached to the lid 12 of the hopper mounting opening 11 while taking a structure. The compressed air A is jetted so as to be more closely aligned with the inclined portion of the bottom surface 6a in the portion 6.

  The air nozzle 13 is used to remove rice that has remained on the bottom surface 6a of the harvesting unit 6 without being removed by the bucket 1 when rice is no longer being fed into the harvesting unit 6 and the rice feed is finished. This is for discharging residual grains. By driving the bucket 1 at the end of the rice lifting, the supplied compressed air A from the compressor 14 is injected from the air nozzle 13, thereby allowing the bottom surface 6 a of the scraping unit 6 to be ejected. The remaining grains of the rice remaining on the surface are lifted up, and the lifted residual grains are picked up by the bucket 1 and sent to the discharge hopper 8 to discharge the residual grains of the rice in the harvesting section 6, thereby Will be mixed into the next rice to be pumped (especially different types of rice).

  An injection valve 16 (solenoid valve) that opens and closes an air supply path 15 from the compressor 14 to the air nozzle 13 to start and stop the compressed air injection from the air nozzle 13 at the base end portion of the injection pipe 13a of the air nozzle 13. The case 3 is provided with an injection controller 17 that opens and closes the injection valve 16 to control the start and stop of the compressed air injection from the air nozzle 13.

  The injection controller 17 is configured to inject the compressed air A from the air nozzle 13 in a predetermined injection pattern when a start command for the residual grain discharge operation is given at the end of rice lifting. In this apparatus, as shown in FIG. 4, when an instruction to start residual particle discharge operation is given, an injection operation for injecting compressed air A from the air nozzle 13 for a set injection time Ta1 of 1 second to 6 seconds is set a plurality of times. Over N1, it is configured to repeatedly execute a pause operation for stopping the compressed air injection from the air nozzle 13 for a set pause time Tb1 between each injection operation.

  The set injection time Ta1 is a time within a range of 1 second to 6 seconds, or after the closing operation of the injection valve 16, the air pressure upstream of the injection valve 16 in the air supply path 15 is the open pressure until then. The pressure recovery time required for recovery from rising to the closing pressure is set to a time within a range of 1/3 to 3 times, and the set pause time Tb1 is set to a time within a range of 1 to 3 times the pressure recovery time. It is.

  In addition, in carrying out the residual particle discharging operation as described above in the apparatus of the first embodiment, as a specific example of each set value, for example, the diameter of the ejection pipe 13a of the air nozzle 13 is 10 mm, the compressed air A In the specification of the rated pressure of 0.6 to 0.7 MPa, the set injection time Ta1 = 4 seconds, the set pause time Tb1 = 2 seconds, and the set multiple times N1 = 9 can be mentioned.

  Further, the apparatus is relatively large, and only the injection operation of the above-described form in which the compressed air A is injected for the set injection time Ta1 of 1 to 6 seconds or 1/3 to 3 times the pressure recovery time, the remaining rice grains When it is difficult to reduce the air amount to the target amount at an early stage, as shown in FIG. 5, the injection operation for injecting the compressed air A from the air nozzle 13 for the set injection time Ta1 is performed for a set number of times N1, and the injection operations are performed each time. The second set injection time that is longer than the set injection time Ta1 from the air nozzle 13 is repeatedly executed while the stop operation for stopping the compressed air injection from the air nozzle 13 is interposed for the set stop time Tb1. The second injection operation for injecting the compressed air A by Ta2 is performed for a second set number of times N2, and the air nozzle 1 for the second set pause time Tb2 between the second injection operations of each time. It may be configured to repeatedly execute while interposing a second pause operation to stop the compressed air injection from A.

  That is, in this case, the second injection operation of injecting the compressed air A from the air nozzle 13 for the second set injection time Ta2 (> Ta1) longer than the set injection time Ta1 is repeated in the second half of the operation when the amount of residual particles is reduced. Thus, in each of the second injection operations, a small amount of residual particles are pushed up along the scraping wall on the bucket ascending path u side by compressed air injection after the injection force is reduced due to the pressure drop to the release pressure. As a result, the residual particle discharging function of the form that is caused to rise and scoop into the bucket 1 with high probability is obtained, thereby ensuring high residual particle discharging efficiency in the latter half of the operation.

  As an example of each set value in this case, for example, in the specification of the diameter 10 mm of the ejection pipe 13a of the air nozzle 13 and the rated pressure of the compressed air A of 0.6 to 0.7 MPa, the set injection time Ta1 = 3 seconds The set pause time Tb1 = 2 seconds, the set multiple times N1 = 5 times, the second set injection time Ta2 = 7 seconds, the second set pause time Tb2 = 3 seconds, and the second set multiple times N2 = 3. it can.

[Second Embodiment]
6 and 7 are air nozzles for discharging residual grains with respect to the bucket-type granular conveying apparatus for lifting rice, which is larger than the apparatus shown in the first embodiment and has a large case width in the width direction of the bucket moving path. In this apparatus, two air nozzles 13A and 13B are distributed and arranged at both lateral ends of the lid 12 of the hopper mounting opening 11 (that is, dispersed in the width direction of the bucket moving path). The air nozzles 13A and 13B are in a state of penetrating the injection pipe 13a from the outside of the case to the inside of the case and the lid 12 as in the case of the first embodiment. Are attached to the lid 12 so that the injection pipes 13a of the air nozzles 13A and 13B are in an obliquely downward posture along the inclined portion of the arc-shaped bottom surface 6a of the scraping portion 6.

  That is, by this nozzle arrangement, the bottom surface 6a from the side of the bucket descending path d to the bottom surface 6a in the state where it is along the inclined portion of the bottom surface 6a with respect to the bottom surface 6a of the scooping portion 6 from the tip injection ports 13b of the air nozzles 13A and 13B. Compressed air A is jetted toward the lower part. From one air nozzle 13A, the compressed air A is mainly applied to the half of the bottom surface 6a of the scraper 6 in the width direction of the bucket moving path. The other air nozzle 13B is configured to inject compressed air A mainly to the other half of the bottom surface 6a of the scraper 6 in the width direction of the bucket moving path.

  At the base end portion of the injection pipe 13a of each air nozzle 13A, 13B, branch air supply paths 15a, 15b from the common compressor 14 to the air nozzles 13A, 13B are individually opened and closed to open the air nozzles 13A, 13B. Are provided with injection valves 16a and 16b (solenoid valves) that respectively start and stop the compressed air injection, and the case 3 is operated by opening and closing these injection valves 16a and 16b, respectively, and the two air nozzles 13A and 13B, respectively. There is provided an injection controller 17 for performing start / stop control of the compressed air injection from.

  In the apparatus of the second embodiment, as shown in FIG. 8, the injection controller 17 is supplied with compressed air for the set injection time Ta1 from the air nozzle 13A or 13B when a start command for the residual particle discharge operation is given. An injection operation for injecting A over a set number of times N1, with a pause operation for stopping the compressed air injection from the air nozzle 13A or 13B for a set pause time Tb1 between each injection operation, and It is configured to repeatedly execute an injection valve to be an operation target of a set of operations of one injection operation and a subsequent pause operation by alternately changing between the two injection valves 16a and 16b. Yes, the set injection time Ta1 is set to a time within a range of 1 second to 6 seconds, or a time within a range of 1/3 to 3 times the pressure return time described above, and the set pause time Tb1 is set to a pressure recovery time. It is the time of the 1 to 3 times the range of.

  Further, following the repetition over the set number of times N1 of the injection operation, the second injection operation for injecting the compressed air A from the air nozzles 13A, 13B for the second set injection time Ta2 over the second set number of times N2 The two injection valves 16a and 16b are synchronized with each other while the second pause operation for stopping the compressed air injection from the air nozzles 13A and 13B is interposed between the two injection operations for the second set pause time Tb2. It is configured to execute repeatedly in the form of opening and closing.

  That is, in the first half of the operation in which the amount of residual particles is still large, an injection mode is adopted in which compressed air A is alternately injected from the two air nozzles 13A and 13B, thereby ensuring a large compressed air injection force from each air nozzle 13A and 13B. On the other hand, for the latter half of the operation in which the amount of residual particles is reduced and the residual particles can be discharged efficiently even with a small amount of injection force, a form in which compressed air A is simultaneously injected from the two air nozzles 13A, 13B is adopted. As a result, the residual grains remaining on the bottom surface 6a of the scraping section 6 are discharged without leakage.

  In addition, in carrying out the residual particle discharging operation as described above in the apparatus of the second embodiment, as specific examples of each set value, for example, the diameter of the ejection pipe 13a of the air nozzles 13A and 13B, 10 mm, compressed air In the specification of the rated pressure 0.6 to 0.7 MPa of A, the set injection time Ta1 = 3 seconds, the set pause time Tb1 = 2 seconds, the set multiple times N1 = 8 times (that is, four times for each of the air nozzles 13A and 13B) Injection operation), the second set injection time Ta2 = 7 seconds, the second set pause time Tb2 = 3 seconds, and the second set multiple times N2 = 3.

[Another embodiment]
In the implementation of the first characteristic configuration of the present invention, the set injection time Ta1 is set to a time within the range of 1 second to 6 seconds (preferably 3 seconds to 4 seconds), while the set pause time Tb1 and the set plural times The set value of the number of times N1 is not limited to the example values shown in the first and second embodiments, but an appropriate value can be selected according to the apparatus conditions. Generally, the set pause time Tb1 is 2 seconds. It is preferable to select within a range of ˜6 seconds.

  In the implementation of the second characteristic configuration of the present invention, the air pressure on the upstream side of the injection valve 16 in the air supply path 15 is changed from the open pressure so far to the closing pressure after the closing operation of the injection valve 16 for the set pause time Tb1. In contrast, the set injection time Ta1 and the set multiple times N1 include the first and second set values for the set injection time Ta1 and the set multiple times N1, respectively. Not only the example values shown in the embodiment but also appropriate values can be selected according to the apparatus conditions.

  In the implementation of the third characteristic configuration of the present invention, the set injection time Ta1 is set to a time within a range of 1/3 to 3 times the pressure recovery time, and the set pause time Tb1 is set to 1 time to the pressure return time. While the time is within the range of three times, the set multiple times N1 is not limited to the example values shown in the first and second embodiments, and an appropriate value can be selected according to the apparatus conditions and the like.

  In the implementation of the fourth characteristic configuration of the present invention, the number of equipment of the plurality of air nozzles 13A and 13B for injecting the compressed air A to different parts in the bottom surface 6a of the towing unit 6 is not limited to two, but three or more. In this case, as for the repetition of the injection operation, as shown in FIG. 9, a plurality of injection operations for injecting the compressed air A from the air nozzle 13A, 13B or 13C for the set injection time Ta1 are set. In the state where the pause operation for stopping the compressed air injection from the air nozzles 13A, 13B or 13C is interposed for the set pause time Tb1 between each injection operation over the number N1, and one injection operation and Three or more injection valves 16a to 16c (injection valves for the respective air nozzles 13A to 13C) are set as the operation target of a set of operations with the following one pause operation. Sequentially it is desirable to cause repeatedly executed in the form of change out.

  In the first and second embodiments described above, the device structure in which rice is introduced from the side of the bucket lifting path u to the harvesting unit 6 is shown. You may make it the structure which throws in rice from the side.

  In implementation of the 1st or 2nd characteristic structure of this invention, the granule of conveyance object is not restricted to grains, such as rice, and reversely moves sequentially from the descending path d to the ascending path d in the harvesting part 6. Any granule may be used as long as it can be picked up and transported by a plurality of buckets 1.

  The bucket type particle conveying device according to the present invention can be used for conveying various types of particles including grains.

The whole apparatus side view which omitted a part concerning a 1st embodiment The expanded side view of the apparatus lower part which concerns on 1st Embodiment Enlarged rear view of the lower part of the apparatus according to the first embodiment The figure which shows the operation form of the residual grain discharge driving | operation which concerns on 1st Embodiment. The figure which shows another operation form of the residual grain discharge driving | operation which concerns on 1st Embodiment. Enlarged side view of the lower part of the apparatus according to the second embodiment Enlarged rear view of the lower part of the apparatus according to the second embodiment The figure which shows the operation form of the residual grain discharge driving | operation which concerns on 2nd Embodiment. The figure which shows the operation form of the residual grain discharge driving | operation which concerns on another embodiment. The figure which shows the operation form of the residual grain discharge driving | operation in a conventional apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bucket 6 Sawing part 6a Bottom surface 13 Air nozzle 13A, 13B Air nozzle 14 Compressor 15 Air supply path 15a, 15b Air supply path 16 Injection valve 16a, 16b Injection valve 17 Injection control means A Compressed air d Down path u Ascending path Ta1 set injection time N1 set multiple times Tb1 set pause time

Claims (4)

A bucket-type granular material conveying apparatus that scoops and conveys the granular material charged into the towing unit by a plurality of buckets that are sequentially reversed and moved from the descending path to the ascending path in the toning unit,
An air nozzle for discharging residual particles for injecting compressed air to the bottom surface of the scraping unit, an injection valve for opening and closing an air supply path from the compressor to the air nozzle, and opening and closing the injection valve An injection control means for performing start / stop control of compressed air injection from the air nozzle,
When this injection control means is given a start command for residual grain discharge operation,
The injection operation for injecting compressed air from the air nozzle for a set injection time of 1 second to 6 seconds is set a plurality of times, and the compressed air injection from the air nozzle is stopped for a set pause time between each injection operation. A bucket-type granule conveying apparatus configured to repeatedly execute a pause operation. A bucket-type granular material conveying apparatus that scoops and conveys the granular material charged into the towing unit by a plurality of buckets that are sequentially reversed and moved from the descending path to the ascending path in the toning unit,
An air nozzle for discharging residual particles for injecting compressed air to the bottom surface of the scraping unit, an injection valve for opening and closing an air supply path from the compressor to the air nozzle, and opening and closing the injection valve An injection control means for performing start / stop control of compressed air injection from the air nozzle,
This injection control means
After the closing operation of the injection valve from the open state, the pressure recovery time required for the air pressure upstream of the injection valve in the air supply path to recover from the open pressure up to the closing pressure is recovered. 1 to 3 times as the set pause time,
When an instruction to start the residual particle discharge operation is given, an injection operation for injecting compressed air from the air nozzle for a set injection time is set a plurality of times, and from the air nozzle for a set pause time between each injection operation. A bucket-type granule conveying apparatus configured to repeatedly execute a pause operation for stopping the compressed air injection. A bucket-type granular material conveying apparatus that scoops and conveys the granular material charged into the towing unit by a plurality of buckets that are sequentially reversed and moved from the descending path to the ascending path in the toning unit,
An air nozzle for discharging residual particles for injecting compressed air to the bottom surface of the scraping unit, an injection valve for opening and closing an air supply path from the compressor to the air nozzle, and opening and closing the injection valve An injection control means for performing start / stop control of compressed air injection from the air nozzle,
This injection control means
After the closing operation of the injection valve from the open state, the pressure recovery time required for the air pressure upstream of the injection valve in the air supply path to recover from the open pressure up to the closing pressure is recovered. 1 to 3 times as the set pause time, and 1/3 to 3 times as long as the pressure return time as the set injection time,
When an instruction to start the residual particle discharge operation is given, the injection operation for opening the injection valve for the set injection time is set a plurality of times, and the injection valve is set for the set pause time between each injection operation. A bucket-type granule conveying apparatus configured to repeatedly execute a pause operation for closing a valve. A plurality of the air nozzles for injecting compressed air to different parts of the bottom surface of the scraping unit are provided,
A plurality of injection valves are provided for switching the plurality of air nozzles between a compressed air injection state and an injection stop state by separately opening and closing a branch air supply path from the common compressor to each of the plurality of air nozzles. ,
Of the plurality of injection valves, the injection control means sequentially or alternately changes an injection valve that is a target of a set of operations of one injection operation and a subsequent pause operation. The bucket type particle conveying apparatus according to any one of claims 1 to 3, wherein the injection operation is repeatedly executed over a set number of times.

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