JP2015208233A - Crop washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crop washing device capable of achieving reliable washing force with a simple structure and largely reducing a maintenance cost.SOLUTION: The crop washing device includes: a conveyance unit 10 conveying a crop 1 as a washing target; and plural nozzles 20A, 20B and 20C injecting washing fluid to the crop 1 conveyed on the conveyance unit 10. The nozzles 20A, 20B and 20C are arranged with a predetermined pitch on a peripheral surface of a virtual cylinder VC having an axis DC in a conveyance direction of the crop 1 to constitute a nozzle group. The nozzles 20A, 20B and 20C constituting the nozzle group inject the washing fluid, while the adjacent nozzles 20A, 20B and 20C in a peripheral direction of the virtual cylinder VC are targeted to shifted points in front/rear position in the conveyance direction on the axis DC. Less reduction of the washing force is caused by interference in injected washing water of the adjacent nozzles 20A, 20B and 20C in a peripheral direction of the virtual cylinder VC, and washing unevenness or washing failure is hardly caused.

Description

  The present invention relates to a crop cleaning apparatus particularly suitable for cleaning long crops such as root vegetables such as yam, lotus root, burdock, and radish.

The cultivated root-bearing body of the genus Dioscorea is called “Nagatome” and traded. In Japan, it is mainly produced in the Kamikita region of Aomori Prefecture, Obihiro City, Makuhetsu Town, Chushin, Nagano Prefecture, and the Hokushin region.
Such Nagatoro is now shipped throughout the year. It is a food that can be stored for a relatively long time compared to other vegetables. However, the storage of Nagatoro is not washed immediately after harvesting, but is left with mud. As a result, drying of the main body of the long wall can be prevented, and long-term storage and commercial value can be maintained.
Therefore, the Nagatoro preserved with mud is washed immediately before shipment.

However, mud on the surface is dried by long-term storage, and mud and soil are stuck and are difficult to remove. It is difficult to clean the skin. Especially in the Kamikita region of Aomori Prefecture, long bean pods are often grown on clay soil, and the harvested long pods are stuck with clay-like mud and it is very difficult to wash them.
The mud and soil stuck to the long wall during long-term storage have been manually scrubbed off manually using a scrubber.

  However, it takes a lot of labor to remove mud that has been stuck manually. In addition, in recent years, mass production and consumption have progressed, and as shipments have been made common, it has been required to perform mass processing in a short time by machines.

[Disclosure of references]
As apparatuses for cleaning agricultural products, those shown in Patent Documents 1 and 2 below are disclosed. In the following description of each document, the reference numerals in parentheses are those described in the publication.

  Patent Document 1 includes two rotating brushes (31a, 31b) and a splashing prevention rotating brush (41), and supplies pressurized water to a conveyance path formed by the two rotating brushes (31a, 31b). To do. The object to be cleaned S advances while being cleaned on the conveyance path (paragraphs 0050 to 0051, FIGS. 8 to 10).

Patent document 2 injects high-pressure water toward the center (Q) from the nozzle (5) provided on the inner periphery of the ring-type water separator (1), and focuses on the ring-type water separator (1). Reciprocally rotate in the circumferential direction as a fulcrum. Root vegetables are passed near the center of the ring-type water separator (1) and washed.

JP 2007-289475 A JP 2003-259850 A

[Problems of Reference 1]
The transport cleaning device of Patent Document 1 is cleaning using a rotating brush (31a, 31b). However, by repeating the cleaning, the rotary brushes (31a, 31b) are gradually damaged, and the cleaning action gradually decreases. If it is damaged to some extent, it will be replaced. Thus, the essential rotating brushes (31a, 31b) are consumables, and the cleaning performance is likely to deteriorate and vary, and the maintenance cost is also high. Moreover, the dirt which dried mud stuck like a long bag cannot fully be removed with a rotating brush (31a, 31b). If there is uneven cleaning, the value of the product may be reduced, and the quality of the Nagatoro itself may be reduced.

[Problems of Reference 2]
The root vegetable washing apparatus of patent document 2 wash | cleans with a hydraulic pressure, without using a brush. However, the washing water is sprayed linearly from the nozzle (5) provided in the ring-type water separator (1). In order to uniformly apply such washing water to the surface of root vegetables, the ring-type water separator (1) is reciprocally rotated in the circumferential direction. As a mechanism for that purpose, a forward / reverse rotating motor (9), a rotating plate (11) and the like are required. That is, the number of parts is large, the structure is complicated, and the price is high. Moreover, since each part moves very complicatedly, mechanisms and controls for preventing malfunctions are required, and frequent maintenance must be performed.

〔the purpose〕
The present invention solves the above problems and has been made for the following purpose.
Provided is a crop cleaning apparatus that can obtain a reliable cleaning power with a simple structure and can greatly reduce the cost of maintenance.

[Claim 1]
In order to achieve the above object, a crop cleaning apparatus according to claim 1 has the following configuration.
A transport unit for transporting crops to be cleaned;
A plurality of nozzles for injecting a cleaning liquid to the crops transported by the transport unit;
The nozzles are arranged at a predetermined pitch on the peripheral surface of the virtual cylinder with the conveyance direction of the crop as an axis, and constitute a nozzle group,
Each nozzle constituting the nozzle group is configured to inject cleaning liquid between nozzles adjacent to each other in the circumferential direction of the virtual cylinder, aiming at a position where the front and rear positions in the transport direction on the shaft are shifted. .

[Claim 2]
In addition to the structure of the first aspect, the granular material separation apparatus of the second aspect employs the following structure.
Each of the nozzles sprays the cleaning liquid so as to spread in the spraying direction.

[Claim 3]
In addition to the configuration of the first or second aspect, the granular material separation device of the third aspect employs the following configuration.
A plurality of the nozzle groups are provided in the conveyance direction of the crop.

[Claim 4]
In addition to the configuration of the third aspect, the granular material separation device of the fourth aspect employs the following configuration.
The nozzles constituting the nozzle groups are arranged so as not to overlap each other between the nozzle groups adjacent to each other in the agricultural product conveyance direction.

[Claim 5]
In order to achieve the above object, a crop cleaning apparatus according to claim 5 has the following configuration.
A transport unit for transporting crops to be cleaned;
A plurality of nozzles for injecting a cleaning liquid to the crops transported by the transport unit;
The nozzles are arranged at a predetermined pitch on the peripheral surface of the virtual cylinder with the conveyance direction of the crop as an axis, and constitute a nozzle group,
A plurality of the nozzle groups are provided in the conveyance direction of the crop.

[Claim 1]
In the crop cleaning apparatus according to the first aspect, when the crop to be cleaned is transported by the transport unit, the cleaning liquid is sprayed from the plurality of nozzles to the crop transported by the transport unit. The nozzles constitute a nozzle group by being arranged at a predetermined pitch on the peripheral surface of the virtual cylinder whose axis is the conveyance direction of the crop.
And each nozzle which comprises the said nozzle group injects a washing | cleaning liquid aiming at the place where the front-back position of the conveyance direction on the said axis | shaft shifted | deviated between the nozzles adjacent to the circumferential direction of the said virtual cylinder. As described above, since a consumable such as the rotating brush found in Document 1 is not used, it is excellent in maintainability. Further, since the complicated reciprocating rotation mechanism found in Document 2 is not adopted, it is extremely structurally simple. Furthermore, there is little reduction in the cleaning power due to the interference between the sprayed cleaning waters between the nozzles adjacent to each other in the circumferential direction of the virtual cylinder, and cleaning unevenness and poor cleaning are less likely to occur. Thus, a reliable cleaning power can be obtained with a simple structure, and maintenance costs can be greatly reduced.

[Claim 2]
The crop cleaning apparatus according to claim 2 comprises:
Each of the nozzles sprays the cleaning liquid so as to spread in the spraying direction. At this time, between the nozzles adjacent to each other in the circumferential direction of the virtual cylinder, there is little reduction in the cleaning power due to the sprayed cleaning waters interfering with each other, and cleaning unevenness and poor cleaning are less likely to occur.

[Claim 3]
The crop cleaning apparatus according to claim 3 is:
A plurality of nozzle groups provided in the conveyance direction of the crops allow the crops to be cleaned to be washed a plurality of times while being conveyed by the conveyance unit. For this reason, uneven cleaning and poor cleaning are less likely to occur.

[Claim 4]
The crop cleaning apparatus according to claim 4 comprises:
The nozzles constituting the nozzle groups are arranged so as not to overlap each other between the nozzle groups adjacent to each other in the agricultural product conveyance direction. And in the multiple washing | cleaning received while the agricultural products which are washing | cleaning objects are conveyed by a conveyance unit, the place which does not overlap in a circumferential direction is respectively wash | cleaned. For this reason, uneven cleaning and poor cleaning are less likely to occur.

[Claim 5]
The crop cleaning apparatus according to claim 5 comprises:
In the crop cleaning apparatus of claim 5, when the crop to be cleaned is transported by the transport unit, the cleaning liquid is sprayed from the plurality of nozzles to the crop transported by the transport unit. The nozzles constitute a nozzle group by being arranged at a predetermined pitch on the peripheral surface of the virtual cylinder whose axis is the conveyance direction of the crop.
Then, the plurality of nozzle groups provided in the conveyance direction of the crops receive a plurality of washings while the crops to be cleaned are conveyed by the conveyance unit. For this reason, uneven cleaning and poor cleaning are less likely to occur.

It is a side view explaining the crop cleaning apparatus of a 1st embodiment of the present invention. It is the figure which looked at the said washing | cleaning apparatus from the entrance side. It is the figure which looked at the said washing | cleaning apparatus from the top. It is a figure explaining a 1st water supply ring, (I) is the figure seen from the entrance side, (A) is an AA end surface, (B) is a BB end surface, (C) is a CC end surface. . It is a figure explaining the state which injects washing | cleaning liquid with a 1st water supply ring, (I) is the figure seen from the entrance side, (A) is an AA end surface, (B) is a BB end surface, (C) is CC end face. It is a figure which shows the arrangement | positioning state of each water supply ring, (A) is a 1st water supply ring, (B) is a 2nd water supply ring, (C) is a 3rd water supply ring. It is a figure which shows the specific example of a 1st press roll. (A) is a first example, and (B) is a second example.

  Next, an embodiment for carrying out the present invention will be described.

  1-6 is a figure explaining the washing | cleaning apparatus of the agricultural products of 1st Embodiment to which this invention is applied. In the following description, it is assumed that the crop to be cleaned is a long root vegetable, particularly a long salmon. The crops to be cleaned by the present invention are not limited to these.

[Overall structure]
1 is a side view of the cleaning device, FIG. 2 is a view from the inlet side, and FIG. 3 is a top view. FIG. 2 does not show the entrance conveyor 11A.

  The cleaning apparatus includes a transport unit 10 that transports a crop 1 to be cleaned, and a plurality of nozzles 20A, 20B, and 20C that spray a cleaning liquid onto the crop 1 transported by the transport unit 10. Water supply rings 21A, 21B, and 21C.

  The said conveyance unit 10 conveys the crop 1 which is a washing | cleaning object toward the exit side (right side in FIG. 1) from the entrance side (left side in FIG. 1). The conveyance line and conveyance direction of the crop 1 are shown by arrow DC. The said conveyance unit 10 conveys the elongate agricultural products 1 one by one like a long wall so that the longitudinal direction may follow the fixed conveyance line DC.

  Three of the water supply rings 21A, 21B, and 21C are arranged along the transfer line DC. The first water supply ring 21A, the second water supply ring 21B, and the third water supply ring 21C are arranged in order from the inlet side to the outlet side. Each said water supply ring 21A, 21B, 21C is arrange | positioned at predetermined intervals so that the conveyance line DC of the agricultural products 1 may become a central axis. Each of the water supply rings 21A, 21B, and 21C is arranged so as to look like a ring around the transfer line DC when viewed from the inlet side or the outlet side.

  The crop 1 is transported along a transport line DC connecting the centers of three water supply rings 21A, 21B, and 21C. That is, the conveyed crop 1 passes through substantially the center of each of the three water supply rings 21A, 21B, and 21C arranged side by side.

[Water supply ring]
FIG. 4 is a diagram illustrating the first water supply ring 21A. The second water supply ring 21B and the third water supply ring 21C have the same structure as the first water supply ring 21A. Therefore, the first water supply ring 21A is shown as a representative. (I) is a view as seen from the entrance side, (A) is an AA end face, (B) is a BB end face, and (C) is a CC end face.
FIG. 5 is a diagram illustrating an arrangement state of the three water supply rings 21A, 21B, and 21C. Each state is seen from the entrance side. (A) is the first water supply ring 21A, (B) is the second water supply ring 21B, and (C) is the third water supply ring 21C.

  The nozzles 20A, 20B, and 20C provided on the first water supply ring 21A constitute a nozzle group that is arranged at a predetermined pitch on the peripheral surface of the virtual cylinder VC with the conveyance direction of the crop 1 as an axis. .

  In the first water supply ring 21 </ b> A, six nozzles 20 </ b> A, 20 </ b> B, and 20 </ b> C are formed on the inner peripheral surface of a circular annular pipe 24. A water conduit 22 is connected to the upper part of the annular pipe 24, and a drain pipe 23 is connected to the lower part. The virtual cylinder VC is a cylinder that passes through the portion of the inner peripheral surface where the inner diameter of the annular pipe 24 is the smallest and has the transport line DC as an axis. An even number of nozzles 20A, 20B, and 20C are arranged at equal intervals in the circumferential direction on the virtual cylinder VC. In this example, six nozzles 20A, 20B, and 20C are arranged at intervals of 60 ° with the conveyance line DC as the center. The six nozzles 20 </ b> A, 20 </ b> B, and 20 </ b> C inject cleaning liquid toward the transfer line DC that is the center of the annular pipe 24.

  The even number of nozzles 20A, 20B, and 20C is a pair of opposed nozzles about the transport line DC. The first nozzle 20A, the second nozzle 20B, and the third nozzle 20C are each a pair. When these are viewed counterclockwise from the inlet side of the first water supply ring 21A, the first nozzle 20A, the second nozzle 20B, the third nozzle 20C, the first nozzle 20A, the second nozzle 20B, and the third nozzle 20C. Arranged in order. That is, regarding each individual nozzle, a different set of nozzles is arranged adjacent to it.

  Thus, the three sets of six nozzles 20A, 20B, and 20C provided in the first water supply ring 21A constitute one group of nozzles. The 2nd water supply ring 21B and the 3rd water supply ring 21C are also the same structure, and three sets of six nozzles 20A, 20B, and 20C are provided in each, and constitute one group of nozzles, respectively.

  Each of the nozzles 20A, 20B, and 20C ejects the cleaning liquid so as to spread in the ejection direction. For example, as each of the nozzles 20A, 20B, and 20C, a nozzle that sprays the cleaning liquid in a conical shape or a nozzle that sprays in a fan shape can be used. The spray angles of the nozzles 20A, 20B, and 20C can be appropriately set according to the distance between the nozzles 20A, 20B, and 20C and the crop 1 passing through the transport line DC. In this manner, the three sets of six nozzles 20A, 20B, and 20C that eject the cleaning liquid so as to spread toward the ejection direction can be used. The six nozzles 20A, 20B, and 20C can have the same injection angle. Different jet angles can be used for each group.

  The nozzles 20A, 20B, and 20C constituting the nozzle group spray the cleaning liquid aiming at the position where the front and rear positions in the transport direction on the axis are shifted between the adjacent nozzles in the circumferential direction of the virtual cylinder VC. It is configured to

In this example, this configuration is realized as follows.
As shown in FIG. 4A, the first nozzle 20A is arranged such that the injection direction is inclined toward the inlet side. That is, the injection direction of the first nozzle 20A is inclined toward the inlet side by an angle α with respect to an orthogonal line that extends from the peripheral surface of the virtual cylinder VC toward the axis overlapping the conveyance line DC.
As shown in FIG. 4B, the injection direction of the second nozzle 20B is not inclined. That is, the injection direction of the second nozzle 20B overlaps with an orthogonal line from the peripheral surface of the virtual cylinder VC toward the axis overlapping with the transport line DC.
As shown in FIG. 4C, the third nozzle 20C is arranged such that its injection direction is inclined toward the outlet side. That is, the injection direction of the third nozzle 20C is inclined toward the outlet side by an angle β with respect to an orthogonal line from the peripheral surface of the virtual cylinder VC toward the axis overlapping with the transport line DC.

  Thus, the first nozzle 20A is inclined toward the inlet side by the angle α, the second nozzle 20B is not inclined toward the inlet direction, and the third nozzle 20C is inclined toward the outlet side by the angle β by the angle β. doing. The inclination angle α of the first nozzle 20A and the inclination angle β of the third nozzle 20C are appropriately set according to the injection angle of each nozzle 20A, 20B, 20C, the distance from the crop 1 passing through the transport line DC, and the like. Can do.

  FIG. 5 is a diagram illustrating a state in which the cleaning liquid is sprayed so that the nozzles 20A, 20B, and 20C spread in the spraying direction in the first water supply ring 21A. As described above, each of the nozzles 20A, 20B, and 20C constituting the nozzle group ejects the cleaning liquid aiming at the position where the front and rear positions in the transport direction are shifted between the nozzles adjacent in the circumferential direction. For this reason, the spraying area | region of the cleaning liquid which an adjacent nozzle sprays does not overlap, and there is little fall of the cleaning effect by the sprayed cleaning liquids interfering.

  The second water supply ring 21B and the third water supply ring 21C have the same structure as the first water supply ring 21A, and inject the cleaning liquid in the same state.

  In this example, a plurality of the nozzle groups including three sets of six nozzles 20A, 20B, and 20C are provided in the conveyance direction of the crop 1. That is, the first water supply ring 21 </ b> A, the second water supply ring 21 </ b> B, and the third water supply ring 21 </ b> C described above are sequentially arranged from the entrance side in the conveyance direction of the crop 1. In this example, the number of nozzle groups is three, which is the same as the number of water supply rings 21A, 21B, and 21C.

  The nozzles 20 </ b> A, 20 </ b> B, and 20 </ b> C constituting each nozzle group are arranged so as not to overlap each other between nozzle groups adjacent to each other in the conveyance direction of the crop 1 when viewed in the conveyance direction of the crop 1.

In this example, this configuration is realized as follows.
As shown in FIG. 6A, the first water supply ring 21A is arranged such that the set of the first nozzles 20A is opposed along the horizontal line. Therefore, the set of the second nozzles 20B is arranged at a position rotated by 60 ° counterclockwise from the horizontal line as viewed from the inlet side, and the set of the third nozzles 20C is arranged at a position rotated by 60 ° clockwise from the horizontal line. The
As shown in FIG. 6 (B), the second water supply ring 21B is disposed by being rotated 30 ° clockwise as viewed from the inlet side with respect to the first water supply ring 21A. That is, the set of the first nozzles 20A is arranged at a position rotated 30 ° clockwise from the horizontal line when viewed from the inlet side. The set of second nozzles 20B is arranged at a position rotated 30 ° counterclockwise from the horizontal line when viewed from the inlet side, and the set of third nozzles 20C is arranged at a position rotated 90 ° from the horizontal line.
As shown in FIG. 6C, the third water supply ring 21C is arranged in the same manner as the first water supply ring 21A. That is, the set of the first nozzles 20A is arranged so as to be opposed along the horizontal line, and the set of the second nozzles 20B is arranged at a position rotated by 60 ° counterclockwise from the horizontal line when viewed from the inlet side. Are arranged at a position rotated 60 ° clockwise from the horizontal line.

  Therefore, between the first water supply ring 21A and the second water supply ring 21B that are adjacent to each other, six sets of twelve nozzles 20A, 20B, and 20C constituting the two nozzle groups are 30 ° when viewed from the inlet side. Are arranged at an angle. Further, between the second water supply ring 21B and the third water supply ring 21C that are adjacent to each other, six sets of twelve nozzles 20A, 20B, and 20C constituting the two nozzle groups are 30 ° when viewed from the inlet side. Are arranged at an angle. As described above, the nozzles 20A, 20B, and 20C constituting each nozzle group are arranged so as not to overlap each other when viewed in the conveyance direction of the crop 1 between the nozzle groups adjacent to each other in the conveyance direction of the crop 1. Has been.

[Transport unit]
Returning to FIGS. 1 to 3, the transport unit 10 will be described.
The transport unit 10 includes an entrance conveyor 11A, an exit conveyor 11B, first and second transport rolls 13A and 13B, and first to third pressing rolls 12A to 12C.

  The entrance conveyor 11A is disposed on the entrance side of the first water supply ring 21A. 11 A of said entrance conveyors convey and supply the crop 1 toward the conveyance line DC which is the center of said 1st water supply ring 21A. The outlet conveyor 11B is disposed on the outlet side of the third water supply ring 21C. The exit conveyor 11B transports the crop 1 discharged along the transport line DC, which is the center of the third water supply ring 21C, in the transport direction. Both the entrance conveyor 11A and the exit conveyor 11B convey the crop 1 with an endless conveyor belt. On both sides of the conveyor belt 16 are provided guide plates 15 for preventing the crop 1 from falling and transporting the crop 1 along the transport line DC.

  The first transport rolls 13A are arranged in pairs between the first water supply ring 21A and the second water supply ring 21B. The second transport rolls 13B are arranged in pairs between the second water supply ring 21B and the third water supply ring 21C. A set of two first transport rollers 13A and second transport rollers 13B are arranged in the transport direction. The first transport rolls 13A and 13B have a generally dumbbell shape with a small diameter portion 17 provided at the center. The central small-diameter portion 17 is provided so as to be stable when the transported crop 1 passes therethrough. The arrangement of the first and second transport rolls 13A and 13B is determined so as to pass through the transport line DC that is the center of each of the water supply rings 21A, 21B, and 21C when the crop 1 passes through the small diameter portion 17. .

  A pair of the first transport rolls 13A is disposed between the first water supply ring 21A and the second water supply ring 21B. Moreover, the 2nd conveyance roll 13B is arrange | positioned by 2 sets between 2nd water supply ring 21B and 3rd water supply ring 21C. For this reason, the posture of the crop 1 that passes through the transport line DC that is the center of each of the water supply rings 21A, 21B, and 21C is stabilized in a state along the transport line DC.

  The first transport roll 13A is rotationally driven by a first motor 14A via a belt and a pulley. The second transport roll 13B is rotationally driven by a second motor 14B via a belt and a pulley. The first transport roll 13A and the second transport roll 13B are configured by, for example, forming an elastic material such as rubber, elastomer, or urethane, or attaching a sheet of the elastic material as described above to the peripheral surface. be able to.

  When the first pressing roll 12A is disposed on the upper part of the first conveying roll 13A arranged in a pair and lightly presses the crop 1 passing through the small-diameter portion 17 of the first conveying roll 13A from above, and passes through. Stabilize the posture. The second pressing roll 12B is arranged on the upper part of the second conveying roll 13B arranged in a pair, and lightly presses the crop 1 passing through the small diameter portion 17 of the second conveying roll 13B from above and passes through. Stabilize the posture. The 3rd press roll 12C is arranged at the upper part of exit conveyor 11B, and stabilizes the posture at the time of passing through crop 1 discharged on exit conveyor 11B lightly from the top.

FIG. 7 shows a specific example of the first pressing roll 12A.
(A) is a first example. In this example, an elastic protrusion 19 </ b> A made of rubber, elastomer or the like is planted in a brush shape on the peripheral surface of the core roll 18. While the elastic protrusion 19A is deformed, the crop 1 is pressed from above, and the posture is stabilized while preventing damage to the transported crop 1.
(B) is a second example. In this example, an elastic layer 19 </ b> B made of sponge or the like is formed on the peripheral surface of the core roll 18. While the elastic layer 19B is deformed, the crop 1 is pressed from above, and the posture is stabilized while preventing damage to the transported crop 1.

[Example of operation]
With the apparatus described above, it is possible to clean the crops as follows, for example.

  Nagatoro was used as the crop 1 to be cleaned. In the entrance conveyor 11A and the exit conveyor 11B, the interval between the guide plates 15 was set to about 15 cm. As a result, the long irons to be cleaned are fed one by one and conveyed.

The conveyance conditions for Nagatoro were set as follows.
Inlet conveyor 11A: peripheral speed 20.6 m / min. First and second transport rollers 13A, 13B: peripheral speed 22 m / min. Outlet conveyor 11B: peripheral speed 25.3 m / min. It was set later than the convergence of the first and second transport rolls 13A and 13B. Thereby, the long wall conveyed is not stagnated between the entrance conveyor 11A and the first conveyance roll 13A. Further, the peripheral speed of the exit conveyor 11B was set faster than the convergence of the first and second transport rolls 13A and 13B. Thereby, the long paper conveyed is not stagnated between the 2nd conveyance roll 13B and the exit conveyor 11B.

1st-3rd water supply ring 21A, 21B, 21C was comprised as follows.
The forward tilt angle α of the first nozzle 20A was set to 2 °. Further, the backward tilt angle β of the third nozzle 20C was set to 2 °. As the first to third nozzles 20A, 20B, and 20C, fluid spray nozzles manufactured by Ikeuchi Co., Ltd. were used. This is a fan-type spray type with a uniform flow rate over the entire spray pattern.

In the 1st water supply ring 21A, the injection quantity of the washing | cleaning liquid in the 1st-3rd nozzle 20A, 20B, 20C was set as follows. It is a numerical value per nozzle.
Water volume: 67.84 L / min Water pressure: 1.5 MPa
In the second and third water supply rings 21B and 21C, the amount of cleaning liquid sprayed from the first to third nozzles 20A, 20B, and 20C was set as follows. It is a numerical value per nozzle.
Water volume: 82.24 L / min Water pressure: 1.5 MPa
As described above, in the first water supply ring 21A on the inlet side, the injection amount of the cleaning liquid is set to be smaller than those in the second and third water supply rings 21B and 21C arranged on the outlet side. Thereby, the elongate to be cleaned can be smoothly carried into the cleaning area that is inside the first to third water supply rings.

By washing under the above conditions, the following effects were obtained.
It was freed from complicated and labor-intensive and time-consuming work by hand-washing, and the cleaning unevenness that became a problem by brush-based washing was eliminated.
The complicated movement as in Patent Document 2 is not necessary, and the number of injection nozzles can be reduced. For this reason, driving and maintenance are easy, the amount of water is small, and cleaning unevenness does not occur.

  In this way, even a long wall with clayey soil, mud, dry soil, etc. attached can be easily cleaned, does not cause uneven cleaning, has a small amount of cleaning water, and is easy to drive and maintain. is there.

〔effect〕
The apparatus of this embodiment has the following effects.

In the crop cleaning apparatus of this embodiment, when the crop 1 to be cleaned is transported by the transport unit 10, the cleaning liquid is sprayed from the plurality of nozzles 20 </ b> A, 20 </ b> B, 20 </ b> C onto the crop 1 transported by the transport unit 10. Is done. The nozzles 20 </ b> A, 20 </ b> B, and 20 </ b> C constitute a nozzle group by being arranged at a predetermined pitch on the peripheral surface of the virtual cylinder VC with the conveyance direction of the crop 1 as the axis DC.
Then, each of the nozzles 20A, 20B, 20C constituting the nozzle group is located between the nozzles adjacent to each other in the circumferential direction of the virtual cylinder VC. Inject. As described above, since a consumable such as the rotating brush found in Document 1 is not used, it is excellent in maintainability. Further, since the complicated reciprocating rotation mechanism found in Document 2 is not adopted, it is extremely structurally simple. Furthermore, there is little reduction in cleaning power due to the interference between the sprayed cleaning waters between the nozzles adjacent to each other in the circumferential direction of the virtual cylinder VC, and uneven cleaning and poor cleaning are less likely to occur. Thus, a reliable cleaning power can be obtained with a simple structure, and maintenance costs can be greatly reduced.

  Each of the nozzles 20A, 20B, and 20C injects the cleaning liquid so as to spread in the injection direction. At this time, between the nozzles adjacent to each other in the circumferential direction of the virtual cylinder VC, there is little reduction in the cleaning power due to the sprayed cleaning waters interfering with each other, and uneven cleaning and poor cleaning are less likely to occur.

  The plurality of nozzle groups provided in the conveyance direction of the crop 1 receives a plurality of cleanings while the crop 1 to be cleaned is conveyed by the conveyance unit 10. For this reason, uneven cleaning and poor cleaning are less likely to occur.

  The nozzles 20 </ b> A, 20 </ b> B, and 20 </ b> C constituting each nozzle group are arranged so as not to overlap each other between nozzle groups adjacent to each other in the conveyance direction of the crop 1 when viewed in the conveyance direction of the crop 1. Then, in a plurality of times of cleaning that is performed while the crop 1 to be cleaned is transported by the transport unit 10, portions that do not overlap in the circumferential direction are cleaned. For this reason, uneven cleaning and poor cleaning are less likely to occur.

[Modification]
The above has described a particularly preferred embodiment of the present invention. However, the present invention is not intended to be limited to the illustrated embodiment, and can be implemented by being modified in various aspects, and the present invention includes various modifications. This is the purpose.

  For example, a pre-cleaning unit that performs a pre-cleaning process may be disposed in the front part, and a finish cleaning unit that performs a finishing cleaning process may be disposed in the rear part.

Moreover, each water supply ring 21A, 21B, 21C can also arrange | position each nozzle 20A, 20B, 20C in the zigzag form from which the front-back position differs in the circumferential direction on the inner surface of an annular pipe with a square cross section.

DC: transport line VC: virtual cylinder 1: crop 10: transport unit 11A: inlet conveyor 11B: outlet conveyor 12A: first presser roll 12B: second presser roll 12C: third presser roll 13A: first transport roll 13B: first 2 conveyance roll 14A: 1st motor 14B: 2nd motor 15: guide plate 16: conveyor belt 17: narrow diameter part 18: core diameter 19A: elastic protrusion 19B: elastic layer 20A: 1st nozzle 20B: 2nd nozzle 20C: 3rd nozzle 21A: 1st water supply ring 21B: 2nd water supply ring 21C: 3rd water supply ring 22: Water conveyance pipe 23: Drain pipe 24: Annular pipe

Claims (5)

A transport unit for transporting crops to be cleaned;
A plurality of nozzles for injecting a cleaning liquid to the crops transported by the transport unit;
The nozzles are arranged at a predetermined pitch on the peripheral surface of the virtual cylinder with the conveyance direction of the crop as an axis, and constitute a nozzle group,
Each nozzle constituting the nozzle group is configured to inject cleaning liquid between nozzles adjacent to each other in the circumferential direction of the virtual cylinder, aiming at a position where the front and rear positions in the transport direction on the shaft are shifted. A crop cleaning apparatus characterized by that. The crop cleaning apparatus according to claim 1, wherein each of the nozzles sprays the cleaning liquid so as to spread toward the spraying direction. The crop cleaning apparatus according to claim 1, wherein a plurality of the nozzle groups are provided in a transport direction of the crop. The cleaning of the crop according to claim 3, wherein each nozzle constituting each nozzle group is arranged so as not to overlap with each other between nozzle groups adjacent to each other in the transport direction of the crop. apparatus. A transport unit for transporting crops to be cleaned;
A plurality of nozzles for injecting a cleaning liquid to the crops transported by the transport unit;
The nozzles are arranged at a predetermined pitch on the peripheral surface of the virtual cylinder with the conveyance direction of the crop as an axis, and constitute a nozzle group,
A crop cleaning apparatus, wherein a plurality of the nozzle groups are provided in the crop transport direction.

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