JP2006168912A - Bucket elevator and treatment method remaining grain in bucket elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bucket elevator and a method of treating remaining grains at the bottom of the bucket elevator, for ensuring quality of grains. <P>SOLUTION: The bucket elevator adopts an air sweep structure for blowing up remaining grains 4 on a bottom plate 3 in a grain sucking up direction A, by sending air from a blowing port 39 disposed in a bottom plate 3 of a lower unit 9. Therefore, the blown-up remaining grains 4 is collected by a bucket 6 rotating around a lower belt pulley 11. When the remaining grains 4 is different in variety from the grains to be transferred next time, contamination of varieties of grains, that is, the mixing of the remaining grains 4 into the grains to be transferred next time is prevented so that the quality and the commercial value of the grains are assured. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bucket elevator and a residual grain processing method for the bucket elevator, and more particularly to a bucket elevator for conveying grain and a method for processing grain remaining at the bottom of the bucket elevator.

  Conventionally, there has been known a bucket elevator in which an endless belt wound around an upper belt wheel and a lower belt wheel is stretched inside a tower, and a plurality of buckets are attached to the endless belt at predetermined intervals. (For example, refer to Patent Document 1). In the bucket elevator, an endless belt is run to circulate each bucket, so that an object to be conveyed that has been carried into the bottom of the bucket elevator is pumped and conveyed by each bucket. By the way, when such a bucket elevator is installed for grain transportation, grain remaining on the bottom plate of the bucket elevator (hereinafter referred to as residual grain) becomes a problem. In the above-described grain elevator bucket elevator (hereinafter simply referred to as a bucket elevator), when the next grain to be transported differs from the residual grain, the residual grain is mixed into the next grain to be transported. It becomes so-called contamination (mixed with different varieties), and quality and commercial value are lowered.

Therefore, such a bucket elevator is devised so that the bottom plate is aligned with the track of the bucket and curved to form a small interval between the bottom plate and the track of the bucket, thereby reducing residual grains. However, in the above bucket elevator, it is necessary to secure an appropriate gap between the bottom plate and the bucket track in order to prevent the skin from slipping (in the case of rice, brown rice is damaged). There is. Therefore, since grains remain in the space between the bottom plate and the bucket track, contamination cannot be eliminated completely, and further improvement is desired. Moreover, in the above bucket elevator, even if the varieties of the grain to be transported next and the residual grain are the same, the moisture content of the residual grain is particularly high (in the case of rice, 16% or more is defined as high In such a case, the residual grain may be deteriorated and deteriorated on the bottom plate.
Japanese Unexamined Patent Publication No. 7-53025 (paragraph numbers 0015 to 0019, FIGS. 1 and 5)

Then, this invention was made | formed in view of the said situation, and the 1st objective is to provide the bucket elevator with which the quality of grain is ensured.
A second object is to provide a method for treating a bottom residue of a bucket elevator in which grain quality is ensured.

In order to achieve the first object, the invention according to claim 1 of the present invention is such that a plurality of buckets are attached to an endless belt adjusted inside the tower at predetermined intervals, and are attached to the lower part of the tower. A bucket elevator in which the supplied grain is pumped up by a bucket that is circulated in a predetermined path, and is provided with a blowing unit that blows air from a blowing port provided in the bottom plate in a grain pumping direction.
According to a second aspect of the present invention, in the bucket elevator according to the first aspect of the present invention, the bucket elevator includes a blower amount control unit that adjusts a blower amount of the blower unit.
A third aspect of the present invention is the bucket elevator according to the first or second aspect, further comprising belt tension adjusting means for adjusting a tension of the endless belt in a state where a distance between the track of the bucket and the bottom plate is maintained. Features.

In order to achieve the second object, the invention according to claim 4 of the present invention is a bucket in which grain is pumped by a plurality of buckets attached to an endless belt at a predetermined interval and circulated in a predetermined track. A method for treating residual grains in an elevator, in which air is blown in the direction of drawing up grains by blowing air from a blower opening provided in the bottom board, and the blown up grains are collected by a bucket. It is characterized by doing.
According to a fifth aspect of the present invention, in the bottom residue processing method of the bucket elevator according to the fourth aspect, the air is blown through the grain left on the bottom plate by blowing air from the blower opening, thereby remaining on the bottom plate. It is characterized by maintaining the quality of the finished grain.
The invention according to claim 6 is characterized in that, in the bucket elevator bottom residue processing method according to claim 4 or 5, the tension of the endless belt is adjusted while maintaining a distance between the bucket track and the bottom plate. To do.

Therefore, in the first aspect of the present invention, air is blown by the blower means from the blower opening provided in the bottom plate in the grain drawing direction.
In the second aspect of the present invention, the air volume of the air blown from the air outlet is adjusted by the air volume control means.
In the invention described in claim 3, the tension of the endless belt is adjusted by the belt tension adjusting means in a state where the distance between the track of the bucket and the bottom plate is maintained.

In the invention according to claim 4, the residual grain is blown up in the grain pumping direction by the air blown from the blower opening. The residual grains blown up are collected by a bucket that moves in the direction of drawing up the grains.
In the invention according to claim 5, the air content blown from the air outlet is passed through the residual grain, whereby the moisture content, temperature, etc. of the residual grain are adjusted, and the quality of the residual grain is maintained.
According to the sixth aspect of the present invention, even when the tension of the endless belt is adjusted, the distance between the bucket track and the bottom plate is properly maintained.

  A bucket elevator in which grain quality is ensured and a method for treating a bottom residue of the bucket elevator can be provided.

  An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the bucket elevator 1 is configured such that grains carried on a bottom plate 3 of an elevator body 2 (tower) are pumped up by a plurality of buckets 6 circulating inside the elevator body 2. It is conveyed to. The elevator body 2 has an endless belt 7 stretched in the vertical direction inside, and the bucket 6 is attached to the endless belt 7 at a predetermined interval. The elevator main body 2 includes the upper belt wheel 10 supported by the upper frame 8 disposed in the upper portion and the lower belt wheel 11 supported by the lower unit 9 disposed in the lower portion. 7 is wound. In the elevator main body 2, the upper belt wheel 10 is rotationally driven by a belt driving motor 12 provided in the upper frame 8, whereby each bucket 6 attached to the endless belt 7 has a predetermined track C (see FIG. 2)).

  As shown in FIG. 2, the lower unit 9 is curved in alignment with the track C of the bucket 6 on each of the lower sides formed in a substantially arc shape of the pair of side plates 13 facing each other. A unit base 14 is provided which is formed by laying the bottom plate 3. The unit base 14 is accommodated in the lower frame 15 of the elevator body 2 so as to be movable up and down. As shown in FIGS. 1, 6 and 7, the bucket elevator 1 has an air introduction chamber 38 between the bottom plate 34 of the lower frame 15 of the elevator body 2 and the bottom plate 3 of the lower unit 9. As a result, the air introduction chamber 38 and the blower device 35 (air blowing means) are connected via the air blowing pipe 36. As shown in FIG. 8, the elevator main body 1 has a plurality of plate-like elements 37 in which the bottom plate 3 of the unit base 14 of the lower unit 9 extends in the width direction of the elevator main body 1 (the paper view direction in FIG. 8). The air introduced into the air introduction chamber 38 is arranged in the overlapping portion of the elements 37 that are arranged along the track C of the bucket 6 and are adjacent to each other. 3 is provided with an air outlet 39 for blowing air toward the residual grain 4 on the 3.

  In the bucket elevator 1, the air flow rate of the blower device 35 is controlled by the air flow rate control device (air flow rate control means). Then, as shown in FIG. 7, in this bucket elevator 1, a predetermined amount of air is blown from the air blowing port 39 of the bottom plate 3 and the residual grain 4 is blown up in the grain pumping direction A, whereby the blown residual The structure is such that the grain 4 is collected by the bucket 6 turning around the lower belt wheel 11 (air sweep structure). Further, the bucket elevator 1 is configured so that the quality of the residual grain 4 is maintained by blowing a predetermined amount of air from the blower opening 39 of the bottom plate 3 and passing it through the residual grain 4 on the bottom plate 3. Is done. The unit base 14 and the lower frame 15 are slid through a sealing. Further, as shown in FIGS. 6 and 7, on the front surface of the lower frame 15 (the surface on the right side in FIG. 6 and FIG. 7), the grain conveyed by the grain conveying path 32 is placed in the lower unit 9 ( A grain intake 33 is provided for taking in on the bottom plate 3).

  As shown in FIGS. 3 to 5, the lower unit 9 penetrates a pair of opposing side surfaces of the unit base 14 and is rotatably supported by the pair of side surfaces via bearings 16. A shaft member 17 is provided, and the lower belt wheel 11 that is rotated integrally with the shaft member 17 is attached to the shaft member 17. The lower unit 9 includes a pair of slide bases 18 that can be moved up and down with respect to the lower frame 15 of the elevator body 2. Furthermore, a bearing 19 that rotatably supports both ends of the shaft member 17 is disposed under each slide base 18. The bucket elevator 1 is driven by synchronizing the slide bases 18 so that the tension of the endless belt 7 wound around the upper belt wheel 10 and the lower belt wheel 11 is adjusted. (Belt tension adjusting means) is provided. As shown in FIGS. 2 to 4, the automatic tension mechanism 20 includes a nut 21 fixed to the upper outer surface of each slide base 18 of the lower unit 9, and a lower frame screwed to each nut 21. 15, and an adjusting screw 22 rotatably supported by a bracket 23 attached to 15.

  In the automatic tension mechanism 20, each sprocket 24 is fixed to the upper end of each adjusting screw 22, and an endless chain 25 is wound around each sprocket 24. Further, the automatic tension mechanism 20 has an air motor 26 attached to the upper left side of the lower frame 15 (left side in FIG. 4), and one side of the lower frame 15 and a sprocket 27 fixed to the rotating shaft of the air motor 26. An endless chain 29 is wound around a sprocket 28 fixed to the adjusting screw 22 arranged at the end. In the bucket elevator 1, the lower unit 9 is pressed downward with a predetermined pressing force by periodically operating the air motor 26 and rotating the adjusting screws 22 with a predetermined rotational torque. Thereby, in this bucket elevator 1, the endless belt wound around the upper belt wheel 10 and the lower belt wheel 11 in a state where the distance between the bottom plate 3 of the lower unit 9 and the track C of the bucket 6 is properly maintained. 7 has a structure in which a predetermined tension is applied. In the bucket elevator 1, the pressure of the compressed air supplied from the compressor 40 (see FIG. 1) to the air motor 26 is controlled by the regulator 30, whereby the rotational torque of each adjusting screw 22, that is, the tension of the endless belt 7. The structure is adjusted.

  Next, the operation of the bucket elevator 1 will be described. In the bucket elevator 1, the grains conveyed through the grain conveyance path 32 and carried into the bottom plate 3 of the lower unit 9 from the grain intake port 33 are sequentially pumped up by a plurality of buckets 6 circulating inside the elevator body 2. And transported upward. Then, the grain pumped up by the bucket 6 is carried out of the elevator body 1 from the grain outlet 31 provided in the upper frame 8 in the process in which the bucket 6 turns around the upper belt wheel 10. Moreover, in this bucket elevator 1, since the suitable space | interval for preventing the skin shift | offset | difference of a grain is provided between the baseplate 3 of the lower unit 9, and the track | orbit C of the bucket 6, as shown in FIG. After the transfer of the grain, the grain (residual grain 4) remains on the bottom plate 3. When the residual grain 4 on the bottom plate 3 is collected, the residual grain 4 on the bottom plate 3 is blown from the air outlet 39 of the bottom plate 3 toward the residual grain 4 while the bucket 6 is circulated. Up the grain in the direction A Thereby, the blown-up residual grains 4 are sequentially collected by the bucket 6 turning around the lower belt wheel 11.

  The residual grain 4 collected in the bucket 6 is carried out of the elevator main body 1 from the grain carry-out port 31 in the process in which the bucket 6 turns around the upper belt wheel 10. In addition, when the residual grain 4 is stored on the bottom plate 3, the residual grain 4 is blown toward the residual grain 4 from the blowing port 39 of the bottom plate 3 and is passed through the residual grain 4 on the bottom plate 3. Thereby, the moisture content, temperature, etc. of the residual grain 4 are maintained appropriately, and the deterioration of the residual grain 4 is prevented. Moreover, in this bucket elevator 1, the tension | tensile_strength of the endless belt 7 is regularly adjusted appropriately by the automatic tension mechanism 20 (belt tension adjustment means). At this time, in the bucket elevator 1, the lower unit 9 is pressed downward with a predetermined pressing force against the lower frame 15 to adjust the tension of the endless belt 7, so that the bottom plate 3 and the bucket 6 of the lower unit 9 are adjusted. A proper distance from the orbit C is secured.

This embodiment has the following effects.
This bucket elevator 1 employs an air sweep structure in which air is blown from the blower opening 39 provided in the bottom plate 3 of the lower unit 9 to the residual grain 4 on the bottom plate 3 and the residual grain 4 is blown up in the grain pumping direction A. The residual grain 4 blown up is collected by the bucket 6 that turns around the lower belt wheel 11.
Therefore, in this bucket elevator 1, when the grain of the grain conveyed next and the residual grain 4 differ, what is called contamination (mixing of different varieties) in which the residual grain 4 is mixed into the grain conveyed next is prevented. As a result, grain quality and commercial value are ensured.

Further, the bucket elevator 1 is configured such that the lower unit 9 can be moved up and down with respect to the lower frame 15 of the elevator body 2, and the lower unit 9 is moved downward with respect to the lower frame 15 by the automatic tension mechanism 20. Tension is applied to the endless belt 7 by being pressed by the pressing force.
Therefore, in this bucket elevator 1, the distance between the bottom plate 3 of the lower unit 9 and the track C of the bucket 6 is properly maintained, so that when the grain is pumped up by the bucket 6, it enters the interval between the bottom plate 3 and the bucket 6. As a result, the quality of the grain and the commercial value are ensured.

In addition, embodiment is not limited above, For example, you may comprise as follows.
You may comprise so that the air which temperature and humidity were adjusted with the air conditioner may be pumped by the blower apparatus 35, and may be ventilated from the ventilation opening 39 to the residual grain 4 on the baseplate 3. FIG. In this case, the deterioration of the residual grain 4 can be prevented more reliably.
In the bucket elevator 1, the adjusting screw 22 is rotationally driven by the air motor 26, but an electric motor capable of adjusting the torque may be used instead of the air motor 26.

It is a general view of this bucket elevator. It is explanatory drawing of this bucket elevator, and is a left view of the lower frame with which the lower unit was assembled | attached. It is explanatory drawing of this bucket elevator, and is a top view of the lower frame with which the lower unit was assembled | attached. It is explanatory drawing of this bucket elevator, and is a front view of the lower frame with which the lower unit was assembled | attached. It is explanatory drawing of this bucket elevator, and is a figure which shows the support structure of a shaft material. It is explanatory drawing of this bucket elevator, and is a figure which shows the state in which the grain remained in the space | interval of the baseplate of a lower unit, and the track | orbit of a bucket. It is explanatory drawing of this bucket elevator, and is a figure which shows a mode that the residual grain blown up and blown from the ventilation port is collect | recovered with a bucket. It is the B section enlarged view in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Bucket elevator, 3 Bottom plate, 6 Bucket, 7 Endless belt, 20 Automatic tension mechanism (belt tension adjustment means), 35 Blower apparatus (air blowing means), 39 Air outlet

Claims (6)

  A bucket elevator in which a plurality of buckets are attached to an endless belt adjusted inside a tower at predetermined intervals, and the grain supplied to the lower part of the tower is pumped up by the bucket circulated in a predetermined trajectory, A bucket elevator comprising air blowing means for blowing air from a blower opening provided in the head toward a direction in which the grain is pumped up.   The bucket elevator according to claim 1, further comprising a blowing amount control unit that controls a blowing amount of the blowing unit.   3. The bucket elevator according to claim 1, further comprising a belt tension adjusting unit configured to adjust a tension of the endless belt in a state where a distance between the bucket track and the bottom plate is maintained.   A method for processing residual grains in a bucket elevator in which grains are pumped up by a plurality of buckets that are attached to an endless belt at predetermined intervals and circulated in a predetermined path, by blowing air from an air outlet provided in a bottom plate. A method for treating residual grains in a bucket elevator, wherein the grains remaining on the bottom plate are blown up in the direction of drawing up the grains, and the blown-up grains are collected by a bucket.   5. The bucket elevator according to claim 4, wherein the quality of the grains remaining on the bottom plate is maintained by blowing air from the air outlet and passing the air through the grains remaining on the bottom plate. Residual grain processing method. The residual grain processing method for a bucket elevator according to claim 4 or 5, wherein the tension of the endless belt is adjusted while maintaining an interval between the track of the bucket and the bottom plate.

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