JP2005211803A - Grain transport apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent foreign matter mixed into grains from sticking to a screw feeder. <P>SOLUTION: In a grain transport apparatus, an unpolished rice transport section 31 has: an unpolished rice introducing port 6 where unpolished rice is supplied; a cylindrical transport section casing 32 for transporting the unpolished rice supplied via the unpolished rice introducing port 6; a screw feeder 33 which is arranged in the transport section casing 32 along its shaft center direction and which carries out rotary transport of the unpolished rice; and a transport section motor 9 for driving the screw feeder 33. A groove section 35 is formed on the inner surface of the transport section casing 32 along the shaft center direction of the transport section casing 32. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a grain conveying device.

  In general, when brown rice obtained by removing rice husks from rice bran is subjected to rice milling to obtain white rice, it is well known to use a rice milling apparatus 1 as shown in FIG. 8, for example. This rice milling apparatus 1 includes an introduction hopper 3 for introducing brown rice into the brown rice conveyance unit 4, a brown rice conveyance unit 4 for conveying the brown rice introduced by the introduction hopper 3, and the rice polished to the brown rice carried from the brown rice conveyance unit 4. (Rice milling) It has the milled rice main-body part 5 which processes and obtains white rice.

  As shown in FIGS. 8 and 9, the brown rice conveyance unit 4 extends substantially horizontally from the brown rice introduction port 6 opened to the introduction hopper 3 and from the brown rice introduction port 6 toward the milled rice main body 5 side. The cylindrical transfer unit casing 7 is arranged in the transfer unit casing 7 in the axial direction of the transfer casing 7 and substantially concentrically with the transfer casing 7, and is introduced from the introduction hopper 3. A screw feeder 8 that directly conveys the brown rice to the milled rice main body 5 by rotation of a screw, and a conveyance unit motor 9 that rotates the screw feeder 8. The clearance between the inner peripheral surface of the transfer casing 7 and the tip of the blade 8a of the screw feeder 8 is set to about 0.5 mm, for example.

  As shown in FIG. 8, the milled rice main body 5 is disposed in a longitudinal cylindrical main body casing 10 perpendicular to the transport casing 7 and in the length direction of the main body casing 10. A cylindrical main body rotation shaft 11, a main body motor (not shown) that rotates the main body rotation shaft 11, and a feed roll 13 that feeds the brown rice that is attached to the main body rotation shaft 11 and is carried downward. And a rice mill roll 14 provided below the feed roll 13 and having a ridge 14a, and a metal net that is provided so as to surround the rice mill roll 14 at a predetermined interval and constitutes the rice milling chamber 12 described above. 15, a white rice discharge port 16 provided below the milled rice chamber 12, and a discharge cylinder 17 that guides the white rice that has passed through the white rice discharge port 16 to the lower side of the milled rice main body 5. In addition, 18 is an opening degree adjustment part which adjusts the opening degree of the white rice discharge port 16 according to the load received from white rice.

  The case where white rice is obtained from brown rice by operating the rice milling apparatus 1 having such a configuration will be described below. In addition, although description is abbreviate | omitted, well-known processes, such as a hulling process, have already been performed until brown rice is obtained.

  The brown rice obtained through the rice hulling process and the like is supplied from the introduction hopper 3 through the brown rice introduction port 6 into the transport unit casing 7. In the brown rice transfer unit 4, the transfer unit motor 9 has already been operated, and the brown rice is carried into the milled rice main body 5 by the screw feeder 8 rotating by the operation of the transfer unit motor 9.

  Also in the milled rice main body 5, the main body motor is already operated, and the brown rice carried into the milled rice main body 5 is sent to the lower part of the milled rice chamber 12 by the rotation of the feed roll 13. The brown rice sent to the lower part of the rice mill 12 is subjected to a rice milling (milling) process by rotation with a rice mill roll 14, and white rice having a desired milling degree obtained by this rice milling process is a white rice discharge port 16 and a discharge cylinder 17. After that, it is discharged to the outside of the milled rice main body 5. In addition, the rice bran generated at the time of milling is sucked through the net 15 and discharged to a predetermined location.

  However, in the process of obtaining white rice from brown rice, the brown rice introduced from the introduction hopper 3 may be mixed with branch-like foreign matters such as straw scraps, straw branches and straw, and in such cases, In the rice milling apparatus 1 configured as described above, the mixed foreign matter may be caught between the screw feeder 8 and the conveying section casing 7, or the foreign matter may be entangled with the screw feeder 8. In this case, the screw feeder 8 rotates. May become dull, and the brown rice conveying ability in the screw feeder 8 may be significantly reduced, or in some cases, the rotation of the screw feeder 8 may be stopped.

  For such a problem, for example, in Patent Document 1, as shown in FIG. 10, a polished rice having a configuration in which all the wings 19 a at positions corresponding to the brown rice inlet 6 in the transfer spiral (screw feeder) 19 are removed. Machine 22 is described.

According to such a configuration, foreign matter can be prevented from being entangled in this portion of the transfer spiral 19 by removing all the wings 19a at the position corresponding to the brown rice inlet 6 in the transfer spiral 19. .
Japanese Utility Model Publication No. 60-42348

  However, in the case of the configuration as shown in FIG. 10, foreign matter may be entangled with the transfer spiral 19 in the portion downstream of the brown rice inlet 6 inside the body 20, and in this case, as in the above case, The rotation of the transfer helix 19 becomes dull, and the brown rice conveying ability in the transfer helix 19 may be remarkably reduced. In some cases, the rotation of the transfer helix 19 may be stopped.

  Therefore, the present invention solves such a problem, and an object of the present invention is to prevent foreign matters mixed in grains from being entangled with the screw feeder.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a grain introduction port through which grains are supplied, a cylindrical transfer unit casing for transferring the grains supplied through the grain introduction port, and A grain conveying device having a screw feeder that is arranged along the axial direction in the conveying section casing and that rotates and conveys the grain, and a drive source that drives the screw feeder, the inner surface of the conveying section casing Further, a groove portion is formed along the axial direction of the transport portion casing.

  According to such a configuration, the groove portion is formed on the inner surface of the conveyance section casing along the axial direction of the conveyance section casing, so that, for example, branch-like foreign matters are mixed in the supplied grain. However, this branch-like foreign substance enters the groove part while being rotated and conveyed together with the grain. And it is conveyed to the back | inner side of a conveyance part casing in the state which entered into the groove part. Therefore, even if foreign matter is mixed in the grain, the foreign matter is conveyed in a state where it enters the groove, so that the foreign matter can be prevented from being entangled with the screw feeder.

  According to a second aspect of the present invention, in the grain conveying device according to the first aspect, a step portion is provided at a boundary portion between the groove portion and the grain inlet side on the inner surface of the conveying portion casing, and the step portion causes the groove portion to be the grain portion. This prevents opening to the introduction port.

  According to such a configuration, the stepped portion is formed to prevent the groove portion from opening to the grain introduction port, so that, for example, branch-like foreign matters are mixed in the supplied grain. In this case, when this foreign matter is supplied together with the grain, it is prevented from entering directly between the screw feeder and the step portion, and this foreign matter is prevented from being caught between the screw feeder and the groove portion. Can do.

  According to a third aspect of the present invention, in the grain conveying device according to the first or second aspect, a wing notch formed by notching the wing of the screw feeder is formed in a part of the screw feeder corresponding to the grain inlet. It is what has been.

  According to such a configuration, the blade notch is formed, so that, for example, when a branch-like foreign matter is mixed in the grain introduced into the grain conveying unit, the screw feeder is provided at the grain introduction port. It is possible to make it difficult for a foreign object to be entangled. Thereby, the introduced foreign material can be smoothly conveyed to the back side of the conveyance unit casing.

  According to a fourth aspect of the present invention, in the grain conveying device according to the third aspect, the wing portion of the screw feeder includes a first wing portion on the downstream side in the grain conveying direction formed with a wing notch portion, and the upstream side in the direction. It is divided into a second wing portion, and the end face on the upstream side in the direction of the first wing portion is prevented from entering the grain introduction port.

  According to such a configuration, when branch-like foreign matters are mixed in the introduced grain, the end surface on the upstream side in the grain conveying direction of the first wing portion is compared with the case where the end face enters the grain introduction port. The introduced branch-like foreign matter can be prevented from being directly entangled with the screw feeder.

According to a fifth aspect of the present invention, in the grain conveying device according to any one of the first to fourth aspects, the groove portion is formed in an upper portion of the inner surface of the conveying portion casing.
According to such a configuration, the grain can be prevented from entering the groove portion and can be transported without leaving the grain.

  As described above, according to the present invention, the groove portion is provided on the inner surface of the conveying portion casing along the axial direction of the conveying portion casing, so that, for example, even if branch-like foreign matters are mixed in the grain, By allowing the foreign matter to enter the groove, the foreign matter can be prevented from being entangled with the screw feeder. Thereby, the fall of the grain conveyance capability of a screw feeder by the entanglement of a foreign material, etc. can be prevented.

  The brown rice conveyance part 31 as a grain conveyance apparatus of this invention is demonstrated using FIGS. FIG. 1 shows the brown rice transport unit 31, and FIG. 2 shows a rice milling apparatus 30 having the brown rice transport unit 31. Since the rice milling apparatus 30 is different from the rice milling apparatus 1 shown in FIG. 8 only in the configuration of the brown rice transport unit 31, in the following description, the same parts as those described with reference to FIGS. The same reference numerals as those used in FIG. 8 and FIG.

  As shown in FIGS. 1 and 2, the brown rice transport unit 31 of the present embodiment includes a brown rice introduction port 6 as a grain introduction port, a transport unit casing 32, a screw feeder 33, and a transport unit motor as a drive source. 9. As shown in FIGS. 1 to 3, an upper portion of the inner surface of the transport casing 32 is opened on the side of the polished rice body 5, and a step 34 is provided at the boundary with the brown rice inlet 6. A groove portion 35 is formed so as not to open with respect to the mouth 6. For example, the step 34 is formed on the same surface as the inner peripheral surface of the transport casing 32. The depth of the groove 35 is, for example, 5 [mm], and 35 a is an opening of the groove 35. As shown in the figure, the groove 35 is formed so as to spread outward in the radial direction of the transport section casing 32. Moreover, in this Embodiment, the conveyance part casing 32 is arrange | positioned so that it may extend substantially horizontally, and the brown rice inlet 6 is provided in the upper surface location of the end.

  In the part corresponding to the brown rice introduction port 6 in the screw feeder 33, that is, in a part of the part where the introduced brown rice falls, the wing part 37 is cut out over the entire circumference of the conveying part rotation shaft 36, and the wing part A notch 38 is formed. The wing portion 37 in the screw feeder 33 is divided into a first wing portion 37a on the downstream side in the grain conveyance direction and a second wing portion 37b on the upstream side in the grain conveyance direction, with a wing notch 38 formed. And the end surface 37c of the 1st wing | blade part 37a upstream of the grain conveyance direction does not enter into the brown rice introduction port 6, that is, in the case of the present embodiment, in the end surface 37c and the brown rice introduction port 6. The inner surface 6a on the downstream side in the grain conveying direction is flush with the inner surface 6a.

  The case where white rice is obtained from brown rice by operating the rice milling apparatus 30 having the above configuration will be described below. As in the case shown in FIGS. 8 and 9, a known process such as a hulling process has already been performed until brown rice is obtained.

  The brown rice obtained through the rice hulling process and the like is introduced from the introduction hopper 3 through the brown rice introduction port 6 into the transport unit casing 32. In the brown rice transfer unit 31, the transfer unit motor 9 has already been operated, and the brown rice is carried into the milled rice main body 5 by the screw feeder 33 that is rotated by the operation of the transfer unit motor 9.

  At this time, as described above, since the wing portion notch 38 is formed in a part of the screw feeder 33 corresponding to the brown rice introduction port 6, for example, the straw rice is introduced into the brown rice introduced into the brown rice transport unit 31. When branch-like foreign matters such as scraps, straw branches, and cocoons are mixed, the introduced foreign matters are smoothly conveyed to the inner side of the conveying unit casing 32 without being entangled with the screw feeder 33. At this time, since the end surface 37c on the upstream side in the grain conveyance direction of the first wing portion 37a and the inner surface 6a on the downstream side in the grain conveyance direction at the brown rice introduction port 6 are the same surface, the end surface 37c is introduced into the brown rice. Compared with the case of entering the mouth 6, it is possible to further suppress the introduced branch-like foreign matter from being entangled directly with the screw feeder 33.

  Further, since the second wing portion 37 b is provided in the screw feeder 33, the remaining rice at the lower portion of the brown rice inlet 6 in the transport unit casing 32 can be minimized.

  Here, as shown in FIGS. 4 (a) and 4 (b), of the foreign matter 39 mixed in the brown rice, the inner peripheral surface of the transfer casing 32 and the tip of the first wing portion 37a. The foreign matter 39a that is so large or thick that it cannot enter the gap (for example, 0.5 mm) does not get entangled with the screw feeder 33, and is moved to the back side of the transport unit casing 32 by the first wing portion 37a together with the brown rice. Be transported.

  Further, the foreign matter 39b such as a branch raft that is small or thin enough to enter the gap between the inner peripheral surface of the transport casing 32 and the tip of the first wing 37a is introduced into the transport casing 32. The step 34 is sandwiched between the inner peripheral surface 34a of the step 34 and the tip of the first wing portion 37a. And it is pushed into the back | inner side rather than the step part 34 by the rotation of the screw feeder 33, or the brown rice (illustration omitted) conveyed by the 2nd wing | blade part 37b. Then, the foreign matter 39 b in a state sandwiched between the inner peripheral surface 34 a of the step portion 34 and the tip portion of the first wing portion 37 a reaches the groove portion 35 and enters the groove portion 35. And the foreign material 39b is conveyed to the back | inner side of the conveyance part casing 32 with the state which entered the groove part 35 further.

  The foreign matter 39 transported to the inner side of the transport unit casing 32 is discharged to the milled rice main body 5 through the transport unit casing 32 and the opening 35 a of the groove 35. The foreign matter 39 discharged to the milled rice main body 5 is crushed by the milled rice roll 14 and the like in the milled rice main body 5 and then sucked through the net 15 together with the ridges generated during the milling and discharged to a predetermined location.

  As described above, the foreign matter 39 transported into the transport unit casing 32 is discharged to the milled rice main body 5, but the groove 35 is provided at the upper part of the transport unit casing 32, so The brown rice is prevented from entering, so that the remaining rice does not come out when the brown rice is transported.

  Moreover, the brown rice introduction part 6 side in the groove part 35 is made not to open by the step part 34, Therefore The foreign material 39c larger than the foreign material 39b between the screw feeder 33 and the groove part 35 (refer FIG. 5, FIG. 6). It is possible to prevent the foreign matter 39c from being caught between the screw feeder 33 and the groove portion 35. That is, for example, when the foreign matter 39 is introduced together with the brown rice, as shown in FIG. 5, when the size of the foreign matter 39c is almost the same as the depth of the groove 35, or as shown in FIG. If the size is slightly larger than the depth of the groove 35 and there is no step 34 on the side of the brown rice inlet 6 of the groove 35, the foreign matter 39c will be removed from the groove 35 and the first wing 37a as shown in the figure. However, the provision of the stepped portion 34 can reliably prevent the above-described biting. 5 and 6 are perspective cross-sections when the conveying unit casing 32 and the screw feeder 33 when the stepped portion 34 is not provided on the brown rice inlet 6 side of the groove portion 35 are viewed from the direction A in FIG. FIG.

  In this way, the foreign matter 39 and the brown rice are separated in the transport unit casing 32, and finally the foreign matter 39 is discharged to the milled rice main body 5, and the brown rice is carried into the polished rice main body 5. Then, the brown rice carried into the milled rice main body 5 is subjected to a rice milling process as in the conventional manner, whereby white rice having a desired milling degree is obtained.

  In the above, the case where the brown rice transport unit 31 is connected to the upstream side of the milled rice main body 5 is shown. However, the present invention is not limited to this. For example, as shown in FIG. A grain conveyance unit 43 having the same configuration as the brown rice conveyance unit 31 is provided between a tension hopper 41 into which brown rice or rice bran is introduced into the facility 40 and a tension elevator 42 that raises and lowers the introduced brown rice or rice bran. It may be arranged to transport brown rice or rice bran. In addition, in FIG. 7, reference numeral 44 denotes a rice huller, and 46 denotes a stone punching machine. If the brown rice or rice bran is transported during these rice hulling and stone cutting processes, the grain transporting unit described above is used. 43 can be appropriately arranged and used.

  In the above embodiment, the blade feeder 33 is provided in the screw feeder 33. However, even if it is not particularly provided, if the groove 35 is formed, it is more effective than those shown in FIGS. There is.

  As described above, by providing the groove portion 35 in the conveyance portion casing 32, the foreign matter 39b can enter the groove portion 35 and be discharged from the conveyance portion casing 32 as shown in FIG. Can be prevented from being entangled with the screw feeder 33. Accordingly, it is possible to reliably prevent the brown rice transfer capability of the screw feeder 33 from being lowered.

  Further, since the brown rice introduction part 6 side in the groove part 35 is not opened by the step part 34, when the foreign matter 39c is introduced from the brown rice inlet 6 together with the brown rice, it is slightly between the screw feeder 33 and the groove part 35. Large foreign matter 39c can be prevented from entering directly, and foreign matter 39c can be prevented from being caught between screw feeder 33 and groove portion 35. Accordingly, it is possible to prevent a reduction in the brown rice conveying ability in the screw feeder 33.

  Further, by providing the blade feeder 33 with the blade notch 38 in the screw feeder 33, when the foreign matter 39 is introduced together with the brown rice from the brown rice inlet 6, the introduced foreign matter 39 is smoothly entangled with the screw feeder 33. It can be transported to the back side of the transport section casing 32. And the foreign material 39 can be discharged | emitted to the outer side of the conveyance part casing 32 by the groove part 35 and the 1st wing | blade part 37a.

It is a figure which shows the brown rice conveyance part of embodiment of this invention. It is a figure which shows the rice milling apparatus provided with the brown rice conveyance part shown in FIG. It is a cross-sectional view of a conveyance part casing. It is a figure which shows the state in which the foreign material is conveyed by the back | inner side of a conveyance part casing. It is a figure which shows the state which a foreign material enters into a groove part. It is the figure at the time of seeing the state which caught the foreign material between the groove part when not providing a step part, and a screw feeder, and it sees from the AA direction as shown in FIG. FIG. 4 shows a state in which a larger (thick) foreign material is included between the groove portion and the screw feeder when the step portion is not provided than in the case shown in FIG. 5, from the AA direction as shown in FIG. 4. FIG. It is a figure which shows the state which connected the grain conveying apparatus of this invention downstream from the tension hopper in the rice milling equipment. It is a figure which shows the conventional rice milling apparatus. It is a figure which shows the conventional brown rice conveyance part. It is a figure which shows the rice milling machine described in patent document 1. FIG.

Explanation of symbols

6 Brown Rice Introduction Port 9 Conveyor Motor 31 Brown Rice Conveyor 32 Conveyor Casing 33 Screw Feeder 35 Groove

Claims (5)

A grain introduction port through which the grain is supplied, a cylindrical conveyance unit casing for conveying the grain supplied via the grain introduction port, and the axial direction in the conveyance unit casing. A grain feeder having a screw feeder that rotates and conveys the grain and a drive source that drives the screw feeder, and a groove portion is formed on the inner surface of the conveyor casing along the axial direction of the conveyor casing. A grain conveying device formed. A step portion is provided at a boundary portion between the groove portion and the grain introduction port side on the inner surface of the transport unit casing, and the step portion prevents the groove portion from opening to the grain introduction port. The grain conveying device according to claim 1. The grain feeder according to claim 1 or 2, wherein a wing part notch part formed by notching a wing part of the screw feeder is formed in a part of a position corresponding to the grain inlet in the screw feeder. The wing portion in the screw feeder is divided into a first wing portion on the downstream side in the grain conveying direction and a second wing portion on the upstream side in the direction in which a wing notch portion is formed, and the first wing portion The grain conveying device according to claim 3, wherein an end face on the upstream side in the direction is prevented from entering a grain introduction port. The grain conveying device according to any one of claims 1 to 4, wherein the groove is formed in an upper portion of the inner surface of the conveying portion casing.

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