JP2004010213A - °screw for conveyance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw for conveyance capable of conveying a solid particle aggregate, such as bean-curd refuse, containing a moisture content at a comparatively slow speed without generating concretion. <P>SOLUTION: The screw 1 for conveyance comprises a columnar rotary shaft 2 rotating counterclockwisely (anticlockwise) as seen from the starting end side in a conveyance direction through drive of a motor; and a plurality of conveyance members 5 having conveyance surfaces 5a arrayed at intervals of 120° along a virtual spiral 3 in a left hand screw shape drawn at the outside of the rotary shaft 2 and crossing the virtual spiral 3 at a specified angle. When an object to be conveyed is inputted in the vicinity of the right end of the rotary shaft 2 with the rotary shaft 2 rotated in a rotation direction L, the object to be conveyed is conveyed in a conveyance direction P as the object is collided with conveyance surfaces 5a of the conveyance members 5 rotated, in order, in the rotation direction L together with a rotary shaft 3. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a transport screw used in a process of transporting a water-containing solid particle aggregate such as okara generated in a tofu manufacturing process or shochu scum generated in a shochu manufacturing process in a certain direction.
[0002]
[Prior art]
Okara produced at tofu manufacturing plants and shochu slag produced at shochu brewing plants are often handed over to industrial waste disposal contractors for processing, but in recent years they have been used effectively in various fields. Research has been carried out, and some of them have been used as feed for livestock.
[0003]
However, okara produced in a tofu manufacturing plant is a perishable substance containing about 70 to 80% of water, and therefore must be dried until the water content becomes about 5 to 8% before reuse. Yes, various types of okara drying devices have been developed.
[0004]
A typical okara drying apparatus typically has a heating and transporting step of evaporating moisture by externally heating an okara containing moisture in a predetermined direction while heating the same. In such a heating and transporting step, a transport screw 90 as shown in FIG. 11 is used as a means for linearly transporting okara in a certain direction.
[0005]
The transfer screw 90 has a structure in which a plurality of square plate-shaped transfer members 92 are erected radially in accordance with a predetermined rule on an outer peripheral surface 91a of a cylindrical rotary shaft 91. (Not shown), a transport mechanism is formed by providing a motor or the like for rotating the rotating shaft 91 in a fixed direction.
[0006]
In such a transport mechanism, when the rotating shaft 91 is rotated in the rotation direction L by a motor or the like and the okara is inserted near the right end of the transport screw 90 in FIG. The process of repeatedly colliding with the rotating plurality of transport members 92 and being repelled repeatedly moves in the axial direction 91 b while helically rotating around the rotating shaft 91, so that the transport member 90 is moved around the transport screw 90. By heating, the okara is dried while being transported in the transport direction P.
[0007]
In the case of the transport screw 90, the plurality of transport members 92 erected on the outer peripheral surface 91a of the rotary shaft 91 are coaxial with the rotary shaft 91 outside the rotary shaft 91 as shown in FIG. They are arranged at 120-degree intervals along the virtual spiral 93 to be drawn. The virtual spiral 93 has a shape (right-handed screw shape) that advances in the direction opposite to the transport direction P when rotated in the same direction as the rotational direction L (counterclockwise as viewed from the start end of the transport direction P). When the outer peripheral surface 91a is cut in the axial direction 91b of the rotating shaft 91 and developed in a plane, the transport member 92 is in a state as shown in FIG.
[0008]
Here, as shown in FIG. 12, if the okara S collides with the transport member 92c that rotates together with the rotating shaft 91, the okara S is repelled in the axial direction 91b by the axial component x of the rotational force y, It collides with the transport member 92b coming immediately after the transport member 92c, but here again is repelled in the axial direction 91b by the horizontal component force x of the rotational force y and collides with the transport member 92a coming right after the transport member 92b. Then, the ball is repelled in the axial direction 91b, and thereafter, such a collision and repelling process are sequentially repeated, so that the okara S is transported in the transport direction P. In other words, the inserted okara S moves down the stairs one by one while being sequentially flipped by the transport members 92 arranged along the virtual spiral 93 having a right-handed screw shape. The soured okara S is efficiently transported in the transport direction P.
[0009]
[Problems to be solved by the invention]
When the okara is dried in the heating and transporting step using the transport screw 90 shown in FIG. 11, the okara being transported by the transport screw 90 may be combined with each other to form a lump. Once formed, okara nodules are not easily broken, and small nodules grow in a snow-like manner often to become large nodules, which may cause troubles such as blocking the transport path. In addition, since heat does not sufficiently reach the inside of the large-grown baby boomer, moisture does not evaporate, causing various forms of poor drying such as uneven drying and insufficient drying.
[0010]
Therefore, in order to prevent such troubles, the rotational speed of the conveying screw 90 is increased to increase the rotational impact force of the conveying member 91, and the agitating action and the crushing action on the okara are increased. Measures have been taken to prevent the formation of karaka nodules and to crush the formed okara nodules.
[0011]
However, increasing the number of rotations of the rotating shaft 91 increases the stirring and crushing effects of the transport member 91, so that okara nodules can be eliminated. Okara charged at the beginning of the heating and transporting process using the transporting screw 90 reaches the end in a shorter time than the time required for drying, resulting in insufficient drying as a whole. .
[0012]
In order to eliminate such insufficient drying, the heating temperature of the okara may be increased or the heating and transporting step may be lengthened. However, if the heating temperature is excessively increased, the okara is burnt, so there is a limit. When the length is increased, the occupied space is remarkably expanded, so that there is a practical limit.
[0013]
As described above, when the rotation speed of the conventional conveying screw 90 is increased, the stirring and crushing action is increased, so that no okara nodules are formed. However, the conveying speed becomes excessively large and the drying becomes insufficient as a whole. If lowered, there is a problem that the stirring and crushing actions are reduced, a large amount of nodules are formed, and poor drying occurs.
[0014]
The problem to be solved by the present invention is to provide a transport screw capable of transporting a solid particle aggregate containing water such as okara and shochu slag without generating lumps at a relatively slow speed. It is in.
[0015]
[Means for Solving the Problems]
The transport screw of the present invention includes a rotating shaft that rotates counterclockwise when viewed from the starting end side in the carrying direction, and a rotating shaft that extends along a left-handed virtual spiral that is drawn coaxially with the rotating shaft outside the rotating shaft. A plurality of transport members arranged on the outer peripheral surface at intervals and having a transport surface intersecting with the virtual spiral. Here, the left-hand thread shape refers to a ridge shape of a screw thread that advances when the external thread is turned counterclockwise, and the transport surface is a surface having a function of contacting the transport object and moving the transport object. Say.
[0016]
The plurality of transport members are arranged on the outer periphery of the rotary shaft along a left-handed virtual spiral, and the transport surface is provided so as to intersect with the virtual spiral. The object collides with any one of the plurality of transport members rotating together with the rotation shaft and is repelled in the transport direction, but the transport member rotating immediately thereafter is displaced in a direction opposite to the transport direction. Therefore, the repelled transport target does not collide with the transport surface of the transport member rotating immediately after, and collides with the transport surface of the transport member rotating later after separating one or more transport members. Will be played. Therefore, the acceleration in the transport direction is smaller than that in the case where the transport target object collides with the transport surfaces of all the transport members one after another along the arrangement order of the transport members and is repelled in the transport direction. The increase in the moving speed of the vehicle is suppressed.
[0017]
That is, since the transport target is repelled in the transport direction while intermittently colliding with the transport surfaces of the plurality of transport members arranged at intervals, other conditions such as the number of rotations of the rotating shaft and the interval between the transport members are different. Are the same, the increase in the speed of the transfer object in the transfer direction is smaller than in the case of the transfer screw 90 in which the transfer object collides with all the transfer members 91 in order and is repelled in the transfer direction. Therefore, stirring of the object to be conveyed, even if the rotation speed of the rotating shaft is increased for the purpose of enhancing the crushing action, an increase in the conveyance speed is suppressed, and the object to be conveyed is a solid particle aggregate containing water. Can also be conveyed at a relatively slow speed without generating lumps.
[0018]
Here, it is desirable to arrange the transport members such that the rotation passage areas of the transport surfaces of the transport members adjacent to each other in the virtual spiral direction have a common area with each other. With such an arrangement, when the plurality of conveying members are rotating together with the rotating shaft, there is no area through which the conveying surface does not pass. Since the object to be transported always collides with the transport surface of one of the transport members and is repelled in the transport direction, the transport object does not stay between the adjacent transport members.
[0019]
Further, it is desirable that the shape of the conveying member is a square plate shape with one side fixed to the outer periphery of the rotating shaft. By adopting such a shape, not only the function of moving the object by colliding the object to be carried, but also the function of stirring, disturbing, or moving the air in the passage area of the conveying member also occurs. Therefore, the function of preventing the object to be conveyed from agglomerating can be further enhanced, and the simple shape can reduce the manufacturing cost. In addition, when the transfer screw is used in an okara drying device or the like, the heat transfer area can be increased or decreased by increasing or decreasing the thickness of the rectangular plate-shaped transfer member, and the heating state can be changed. Can be controlled relatively finely.
[0020]
On the other hand, it is desirable to dispose a transport restraining member having a restraining surface intersecting the transport direction between transport members adjacent in the axial direction of the rotation shaft. By providing such a transport restraining member, a part of the transport target that collides with the transport surface of the transport member and is repelled in the transport direction collides with the restraint surface of the transport restraint member and moves in a direction different from the transport direction. Since it is repelled, it is possible to enhance the stirring and crushing action on the object to be conveyed, and further suppress an increase in speed in the conveying direction. That is, it is possible to enhance the stirring and crushing action on the transport target, and to transport the transport target at a lower speed.
[0021]
In this case, if the shape of the restraining surface of the transport restraining member is a fan shape that radially spreads radially from the rotation axis, a restraining surface having an area that increases as the distance from the center of the rotation shaft in the radial direction increases can be formed. In addition, it is possible to accurately bounce back the object to be conveyed, which collides with the conveying member and spreads in a direction away from the rotation axis, on the deterrent surface, thereby enhancing the function of suppressing an increase in the conveying speed. In addition, if the area of the suppression surface is increased by increasing the spread angle of the fan shape, the moving speed of the object to be transferred in the transfer direction is reduced. If the spread angle is reduced and the area of the suppression surface is reduced, the movement speed is increased. Since it increases, the transport speed of the transport object can be controlled relatively finely by increasing or decreasing the spread angle of the fan shape.
[0022]
Further, by disposing the leading end in the rotation direction of the inhibiting surface of the transport inhibiting member in the rotational direction more than the leading end in the rotating direction of the transport surface of the transport member adjacent to the rotating shaft in the axial direction, Almost all of the objects to be conveyed that collide with the conveyance member and are repelled in the direction of the rotation axis will accurately collide with the restraining surfaces of the conveyance restraining members that are adjacent in the conveyance direction and be repelled, thereby increasing the conveyance speed. Can be further enhanced. Also, when the displacement is increased, the moving speed of the object to be conveyed in the conveying direction is reduced, and when the displacement is reduced, the moving speed is increased. It can be controlled relatively finely.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
1 is a partial perspective view showing a transport screw according to the first embodiment, FIG. 2A is a partial front view of the transport screw shown in FIG. 1, and FIG. 1B is a side view of the transport screw shown in FIG. FIG. 3 is a partially developed view of the outer peripheral surface of the rotating shaft showing the arrangement of the blades of the transport screw shown in FIG.
[0024]
As shown in FIGS. 1 and 2, the transport screw 1 of the present embodiment has a cylindrical shape that rotates counterclockwise (counterclockwise) when viewed from the start end in the transport direction P by driving a motor (not shown). And a plurality of transport members 5 arranged at 120-degree intervals along the virtual spiral 3 drawn outside the rotary shaft 2 and having a transport surface 5a intersecting the virtual spiral 3 at a fixed angle. ing. The shape of the virtual spiral 3 serving as the arrangement reference of the transport surface 5a is a left-handed screw shape, and is drawn coaxially with the rotating shaft 2.
[0025]
Each transport member 5 has a rectangular plate shape, and one side thereof is fixed to the outer peripheral surface 2 a of the rotating shaft 2. The transport surface 5a of the transport member 5 is disposed so as to form a downward slope in the transport direction P with a displacement angle 5b of about 25 degrees with respect to the axial direction 2b with respect to the axial direction 2b of the rotating shaft 2. I have. Further, a drive shaft 2c for rotatably supporting the rotating shaft 2 is provided so as to protrude from the center of the end surface of the rotating shaft 2 in the axial direction 2b. The displacement angle 5b can be arbitrarily set within a range of about 10 degrees to 30 degrees according to the use conditions. For example, the transfer screw 1 is used for the okara drying apparatus described below (FIG. 7). When the water content of okara, which is the object to be conveyed, is high, it is desirable to set the displacement angle 5b to an angle close to 30 degrees, and as the water content decreases, the displacement angle 5b becomes an angle close to 10 degrees. It is desirable to set to.
[0026]
Therefore, when the object to be conveyed is put on the starting end side of the conveying direction P (near the right end of the rotating shaft 2 in FIGS. 1 and 2) in a state where the rotating shaft 2 is rotated in the rotating direction L, Collides with the transport surface 5a of the transport member 5 sequentially rotating in the rotation direction L together with the rotating shaft 3, and moves in the transport direction P through a process described later.
[0027]
As shown in FIG. 3, the plurality of transport members 5 are arranged on the outer peripheral surface 2a of the rotary shaft 2 along the left-handed virtual spiral 3 and the transport surface 2a intersects the virtual spiral 3 at a fixed angle, Are arranged with a downward gradient in the transport direction P by a displacement angle 5b with respect to the axial direction 2b, the transport target S input at the start end side (near the right end in FIG. 3) of the transport direction P rotates. It collides with any one of the transport surfaces 5a of the plurality of transport members 5 rotating together with the shaft 2, and is repelled in the transport direction P.
[0028]
Here, assuming that the input transport target S collides with the transport surface 5a of the transport member 5C shown in FIG. 3, the transport target S is generated by the axial component x of the rotational force y of the rotating shaft 2. The sheet is flipped in the transfer direction P and jumps out in the transfer direction P beyond the passage area 50C of the transfer member 5C, but the transfer member 5B rotating immediately thereafter is located at a position displaced in the opposite direction to the transfer direction P from the transfer member 5C. Therefore, the transfer target S that has protruded in the transfer direction P beyond the passage area 50C does not collide with the transfer surface 5a of the transfer member 5B, and the transfer surface of the transfer member 5D that rotates immediately after the transfer member 5B. It collides with 5a and is flipped in the transport direction P.
[0029]
The transport target S flipped on the transport surface 5a of the transport member 5D jumps out of the transit area 50D in the transport direction P, but the transport member 5C rotating immediately after that moves in the transport direction P from the transport member 5D. Since the transport target S is in the position displaced in the opposite direction, the transport target S that has jumped out collides with the transport surface 5a of the transport member 5E rotating immediately after the transport member C, and jumps out in the transport direction P. The transport target S that has protruded thereafter moves in the transport direction P while being alternately hit and repelled by the transport members 5 arranged in a left-hand spiral form at 120-degree intervals.
[0030]
Therefore, as shown in FIG. 12, the transport target S continuously collides with all the transport surfaces 92a of the transport members 92 arranged in the right-hand spiral form, rebounds, and moves in the transport direction P. The acceleration of the transport target S in the transport direction P is smaller than that of the conventional transport screw 90, and an increase in the moving speed in the transport direction P is suppressed.
[0031]
That is, in the case of the transport screw 1, the transport target S collides with the transport surface 5 a of the transport members 5 arranged in a left-handed spiral at an interval in the form of a stepping stone, resiliently moves in the transport direction P. Therefore, if other conditions such as the number of rotations of the rotating shaft 2 and the arrangement interval of the transport members 5 are the same, the transport target S continuously collides with all the transport members 92, rebounds, and moves in the transport direction P. The speed increase of the transport target S in the transport direction P is smaller than in the case of the transporting screw 90 that moves.
[0032]
Therefore, even if the rotation speed of the rotating shaft 2 is increased for the purpose of increasing the stirring and crushing action on the transport target S, the increase in the transport speed is relatively small, and the transport target S is not hydrated like okara or shochu slag. Can be conveyed at a relatively slow and moderate speed without generating lumps.
[0033]
As shown in FIG. 3, the rotation passing areas of the transport surfaces 5a of the transport members 5 adjacent to each other in the virtual spiral 3 direction, for example, the rotation passing areas 50C of the transport surface 5a of the transport member 5C and the transport of the transport member 5D. The transport members 5C and 5D are arranged so as to have a common area 50M with the rotation passage area 50D of the surface 5a. Since all the transport members 5 are arranged in such a manner, the transport target S input into the rotation passage area of the transport surface 5a of the transport member 5 always collides with the transport surface 5a of any transport member 5. Therefore, the object S to be transported does not stay between the adjacent transport members 5.
[0034]
Further, in the transport screw 1, the transport member 5 has a rectangular plate shape with one side fixed to the outer peripheral surface 2a of the rotating shaft 2, so that the transport target S is caused to collide with and move the transport target S. In addition, since the air in the passage area of the conveying member 5 can be agitated and disturbed, and the air can be moved, the function of preventing the consolidation of the object S to be conveyed is excellent, and the shape is simple. Therefore, the production cost is low.
[0035]
Next, a transport screw 21 according to a second embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 4 and 5, in the transport screw 21, as in the transport screw 1 described above, the transport members are provided at 120 ° intervals on the outer peripheral surface 22 a of the rotating shaft 22 along the left-handed virtual spiral 22 a. 6, and further, as shown in FIG. 6 and the like, between the transport members 25 adjacent to each other in the axial direction 22b of the rotating shaft 22, a restraining member 26 having a transport restraining surface 26a orthogonal to the transport direction P is provided. Are placed. In order to support or drive the rotating shaft 22, drive shafts 22c are provided on both end surfaces of the rotating shaft 22 so as to protrude along the axial direction 22b.
[0036]
By providing such a restraining member 26, as illustrated in FIG. 6, a part of the transport target S that collides with the transport surface 25 a of the transport member 25 and is repelled in the transport direction P is transported by the restraining member 26. Since the collision occurs with the deterrent surface 26a and is repelled in a direction different from the transport direction P, the agitation and crushing action on the transport target S is increased, and the speed of the transport target S in the transport direction P is increased for transport. It becomes more suppressed than in the case of the screw 1. In other words, the transport target S can be transported at a lower speed while maintaining the stirring and crushing action on the transport target S higher than that of the transport screw 1.
[0037]
In the present embodiment, since the shape of the restraining surface 26a of the transport restraining member 26 is a fan shape radially extending from the rotation shaft 22 in the radial direction, the restraint whose area increases as the distance from the center of the rotation shaft 2 in the radial direction increases. The surface 26a is formed, and the transport object S that collides with the transport member 25 and diffuses in a direction away from the rotary shaft 22 can be accurately bounced back on the deterrent surface 25a, thereby suppressing an increase in transport speed. The work of fixing the conveyance restraining member 26 to the rotating shaft 22 is also easy.
[0038]
In addition, the rotation-direction foremost portion 26b of the restraining surface 26a of the transport restraining member 26 is rotated by an offset 27 from the rotation-direction foremost portion 25b of the transporting surface 25a of the transporting member 25 adjacent to the rotating shaft 22 in the axial direction 22b. L, almost all of the transport target S colliding with the transport member 25 and being repelled in the axial direction 22b of the rotary shaft 22 becomes a restraining surface of the transport restraining member 26 adjacent in the transport direction. The object 26 is accurately collided with the object 26a and repelled, thereby suppressing an increase in the conveying speed of the object S and promoting agitation and crushing of the object S. Other functions, effects, and the like are the same as those of the transport screw 1 described above.
[0039]
Next, with reference to FIG. 7 and FIG. 8, an okara drying apparatus using the transport screw 1 will be described. FIG. 7 is a schematic view showing an okara drying apparatus using the conveying screw 1. FIG. 8 (a) is a partially cutaway plan view of a drying unit constituting the okara drying apparatus, and FIG. FIG. 3C is a partially cutaway front view of the drying unit, and FIG. 3C is a partially cutaway side view of the drying unit.
[0040]
In the okara drying apparatus shown in FIG. 7, four drying units 31 each having a substantially cylindrical shape are horizontally arranged so as to be parallel to each other to form a parallel body 32, and the parallel bodies 32 are vertically arranged in three stages. It is constituted by doing. As shown in FIG. 8, each drying unit 31 has a structure in which the conveying screw 1 is coaxially arranged in a cylindrical casing 30, and the drive shaft 2 c is projected outward from both ends of the casing 30. In the vicinity of both ends of the casing 30, an inlet 30a for introducing an okara, which is an object to be conveyed (an object to be dried), into the casing 30, and an outlet 30b for discharging the okara in the casing 30, respectively. Are provided.
[0041]
As shown in FIG. 8A, the positions of the inlet 30 a and the outlet 30 b are basically the front part and the rear part of the casing 30, respectively. Since the introduction position and the discharge direction of the target object change depending on the positional relationship with another drying unit 31, the object is provided on the upper surface portion or the lower surface portion of the casing 30 as shown in FIG. .
[0042]
The drying units 31 that are horizontally adjacent to each other in the parallel body 32 are arranged such that the transport directions P thereof are opposite to each other, and the outlet 30a formed in the casing 30 at the end side of the drying unit 31 in the transport direction P is The outlet 30b of the drying unit 31 which is connected to the inlet 30b formed at the start end side of the casing 30 of the adjacent drying unit 31 and is located at the last part of the parallel body 32 is connected to the inlet 30a of the drying unit 31 located immediately below. Is communicated to. The transport screw 1 built in each drying unit 31 is driven by a motor so as to rotate in the rotation direction P shown in FIG. 8, and all the drying units 31 are heated by heating means (not shown). ing.
[0043]
As shown in FIG. 7, if an okara, which is an object to be conveyed (an object to be dried), is put into the casing 30 from the inlet 30 a of the drying unit 31 a located at the forefront of the parallel body 32 at the uppermost stage, the inside is built-in. It is conveyed in the conveying direction P by the conveying screw 1 that has been discharged, discharged from the discharge port 30b at the terminal end of the casing 30, and moved into the casing 30 from the inlet 30a of another adjacent drying unit 31. Since such a movement is repeated, that is, the okara is heated while moving as shown by the arrow 33, the water and the like contained in the okara gradually evaporate, and finally the okara is at the bottom. The dried okara is discharged from a discharge port (not shown) of the drying unit 31z located at the rearmost part of the parallel body 32.
[0044]
Since the transport screw 1 built in each drying unit 31 constituting the okara drying device can sufficiently transport the okara while stirring and crushing by the above-described stirring and crushing action, the okara nodule It is possible to produce dried okara that does not cause burning or scorch and is free from insufficient drying and poor drying. In addition, since the speed of conveying okara by the conveying screw 1 is lower than that of the conventional conveying screw 90, the conveying path indicated by the arrow 33 can be shortened as compared with the conventional case.
[0045]
Here, with reference to FIG. 9, a description will be given of a difference in drying performance between the drying unit 31 having the transport screw 1 built therein and the conventional drying unit having the same structure having the transport screw 90 built therein. FIG. 9 shows an example of the okara drying apparatus of FIG. 7 in which twelve drying units 31 are arranged and the same okara drying apparatus in which twelve drying units of the same structure including a conventional conveying screw 90 are arranged. It is a graph which shows each drying performance at the time of drying a rate of okara. The drying unit number on the horizontal axis indicates the number of the drying unit positioned from the first drying unit, and the vertical axis indicates the water content of okara sampled from each drying unit.
[0046]
As can be seen from FIG. 9, the difference between the moisture content of the soybeans sampled from the drying unit 31 and the conventional drying unit from the beginning to the vicinity of the fourth drying unit is small, but the drainage of the sixth drying unit 31 is small. The water content of the okara sampled from the outlet 30b is about 43%, while the water content of the okara sampled from the sixth conventional drying unit is about 62%, and the water content of the okara sampled from the drying unit 31 is The water content is lower by about 20%.
[0047]
The water content of okara discharged from the twelfth conventional drying unit located at the final stage is 40% or more, and a further drying step is required. It can be seen that the water content of okara has dropped to about 2%, and the okara product is ready to be shipped.
[0048]
As described above, if the drying unit 31 incorporating the transport screw 1 is used, the okara can be transported at a relatively low speed while sufficiently stirring and crushing the okara. Therefore, the drying unit incorporating the conventional transport screw 90 is used. It is possible to configure the okara drying apparatus with a smaller number of arrangements, thereby reducing the space occupied by the apparatus and the energy for operating the apparatus. As described above, when the moisture content of the soybean that is the object to be transported is high, the displacement angle 5b of the transport member 5 is set to an angle close to 30 degrees, and the displacement angle 5b is set to 10 degrees as the moisture content decreases. It is desirable to set the angle close to.
[0049]
Next, the drying unit 35 formed using the transport screw 21 shown in FIG. 4 will be described with reference to FIG. The drying unit 35 has a structure in which the transport screw 21 is coaxially arranged in a cylindrical casing 36 and the drive shaft 22c projects outward from both ends of the casing 30, similarly to the above-described drying unit 31. In the vicinity of both ends of the casing 36, there are provided an inlet 36a for introducing okara, which is an object to be conveyed (an object to be dried), into the casing 36, and an outlet 36b for discharging okara inside the casing 36, respectively. Is provided.
[0050]
Three discharge members 37 are tangent to the rotation shaft 22 of the transfer screw 21 built in the casing 36 at intervals of 120 degrees in order to sweep out the transfer target conveyed to the end portion from the discharge port 36b. The conveying member 25 is provided on the outer periphery of the rotating shaft 22 in a direction opposite to the conveying member 25 in order to prevent the object to be conveyed that has been conveyed to near the end of the casing 36 from being conveyed earlier than the discharge port 36. The three reversing members 38, which are greatly displaced, are erected in the radial direction at intervals of 120 degrees. The structure of the drying unit 35 is the same as that of the drying unit 31 except that the built-in conveyance screw 21 includes a conveyance restraining member 26, a discharge member 37, and a reversing member 38.
[0051]
In the case of the drying unit 35, since the transport screw 21 includes the transport inhibiting member 26, the transport target can be transported at a lower speed than the drying unit 31. It is suitable for the transporting step and drying step of a substance that easily forms odor, and if used in an okara drying apparatus, the drying path can be further shortened.
[0052]
Since the present invention is not limited to the above-described embodiments, the pitch of the virtual spiral, the interval between the transport members arranged along the virtual spiral, the intersection angle between the transport surface and the virtual spiral, the rotation axis The displacement angle between the axial direction and the transfer surface, the shape and area of the transfer member and transfer surface, and the shape, area, arrangement position, and arrangement interval of the transfer suppression member should be set appropriately according to the properties of the transfer target. Can be.
[0053]
【The invention's effect】
The present invention has the following effects.
[0054]
(1) An interval is formed on the outer peripheral surface of the rotating shaft along a rotating shaft that rotates counterclockwise when viewed from the starting end side in the transport direction and a left-handed virtual spiral that is drawn coaxially with the rotating shaft outside the rotating shaft. And a plurality of transfer members having a transfer surface intersecting with the virtual spiral are arranged in the transfer object, the transfer target is arranged along a left-handed virtual spiral, and a plurality of transfer members rotating counterclockwise. Since it moves in the transport direction while intermittently colliding with the transport surface, an increase in the transport speed due to an increase in the number of rotations is suppressed, and even if the transport target is a solid particle aggregate containing water, the aggregates are reduced. It is possible to convey at a relatively slow speed without generating.
[0055]
(2) If the conveying members are arranged such that the rotation passing areas of the conveying surfaces of the conveying members adjacent to each other in the virtual spiral direction have a common area, there is no area where the conveying surface does not pass through rotation. The object does not stay between the adjacent transport members.
[0056]
(3) By making the shape of the transfer member a square plate shape with one side fixed to the outer periphery of the rotating shaft, not only the function of causing the transfer object to collide and move, but also stirring the air in the passage area of the transfer member, Since the action of disturbing or moving the air is also generated, the function of preventing the consolidation of the objects to be conveyed can be further enhanced, and the simple shape can reduce the production cost.
[0057]
(4) By arranging a transport restraining member having a restraining surface crossing the transport direction between transport members adjacent in the axial direction of the rotation shaft, the transport restraining member collides with the transport surface of the transport member and is repelled in the transport direction. A part of the transported object collides with the restraining surface of the transport restraining member, and is repelled in a direction different from the transport direction. It can be transported.
[0058]
(5) By making the shape of the restraining surface of the transport restraining member a fan shape radially extending from the rotation axis in the radial direction, it is possible to form a restraining surface having an area that increases as the distance from the center of the rotation axis increases in the radial direction. Therefore, it is possible to accurately bounce back the object to be conveyed, which collides with the conveying member and spreads away from the rotation axis, on the deterrent surface, thereby improving the function of suppressing an increase in the conveying speed.
[0059]
(6) By disposing the leading end in the rotational direction of the inhibiting surface of the transport inhibiting member in the rotational direction more than the leading end in the rotational direction of the transport surface of the transport member adjacent in the axial direction of the rotating shaft, Almost all of the transported objects that collide with the transport member and are repelled in the direction of the rotation axis accurately collide with the restraining surfaces of the transport restraining members adjacent in the transport direction and are repelled. The function of suppressing the increase can be further enhanced.
[Brief description of the drawings]
FIG. 1 is a partial perspective view illustrating a transport screw according to a first embodiment.
2A is a partial front view of the transport screw shown in FIG. 1, and FIG. 2B is a side view of the transport screw shown in FIG.
FIG. 3 is a partial development view of an outer peripheral surface of a rotating shaft constituting the transport screw shown in FIG. 1;
FIG. 4 is a partial perspective view illustrating a transport screw according to a second embodiment.
5A is a partial front view of the transport screw shown in FIG. 4, and FIG. 5B is a side view of the transport screw shown in FIG.
6 is a partially developed view of an outer peripheral surface of a rotating shaft that constitutes the transport screw shown in FIG.
7 is a schematic configuration diagram of an okara drying apparatus using the transport screw shown in FIG.
8 (a) is a partially cutaway plan view of a drying unit constituting the okara drying apparatus shown in FIG. 7, (b) is a partially cutaway front view of the drying unit, and (c) is a view of the drying unit. It is a partially notched side view.
9 is a graph showing the drying performance of the okara drying apparatus shown in FIG.
10A is a partially cutaway plan view of a drying unit using the transport screw shown in FIG. 4, FIG. 10B is a partially cutaway front view of the drying unit, and FIG. It is a partial notch side view.
FIG. 11A is a partial perspective view showing a conventional transport screw, and FIG. 11B is a side view showing the transport screw.
12 is a partially developed view of the outer peripheral surface of a rotating shaft that constitutes the transport screw shown in FIG.
[Explanation of symbols]
1,11,21 Transfer screw
2,22 rotation axis
2a, 22a Outer peripheral surface
2b, 22b axial direction
2c, 22c drive shaft
3,23 virtual spiral
5,5A-5C conveying member
5a Transfer surface
5b Displacement angle
30,36 Casing
30a, 36a intake
30b, 36b outlet
31, 31a, 31z, 35 Drying unit
32 parallel objects
33 arrow
34 Inlet
37 Discharge member
38 Reversing member
50C, 50D, 50E rotation passage area
50M common area

Claims (6)

A rotating shaft that rotates counterclockwise when viewed from the starting end side in the transport direction, and an outer circumferential surface of the rotating shaft along a left-handed virtual spiral that is drawn coaxially with the rotating shaft outside the rotating shaft. A plurality of conveying members arranged at a position and having a conveying surface intersecting the virtual spiral. The transport screw according to claim 1, wherein the transport members are arranged such that rotation passage areas of transport surfaces of the transport members adjacent to each other in the virtual spiral direction have a common area. 3. The transport screw according to claim 1, wherein the shape of the transport member is a square plate shape having one side fixed to the outer periphery of the rotation shaft. 4. 4. The transport screw according to claim 1, wherein a transport restraining member having a restraining surface intersecting with the transport direction is disposed between the transport members adjacent to each other in the axial direction of the rotation shaft. 5. 5. The transport screw according to claim 4, wherein the shape of the restraining surface of the transport restraining member is a fan shape radially extending from the rotation axis in a radial direction. The rotation-direction foremost portion of the restraining surface of the restraining member is displaced in the rotation direction from the foremost portion of the transporting surface of the transporting member adjacent in the axial direction of the rotating shaft in the rotation direction. 5. The transport screw according to 5.

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