JP2005138915A - Pipe member, and transfer device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe member 1, provided internally with a spiral guide 4, which can be integrally molded, at low cost, and in compact form. <P>SOLUTION: In this pipe member 1, the spiral guide 4 is formed long along an axis 3, parting the inner diameter part of a cylinder body 2 in the diametric direction of it, to be twisted around the axis 3 of the cylinder body 2. They are integrally molded by extrusion in such a way that the outer circumferential edge of the guide 4 is continuously connected to the inner diameter wall 2a of the cylinder body 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention provides a pipe member in which a spiral guide body is provided so as to partition an inner diameter portion of a cylindrical body in a diameter direction, and an outer peripheral edge of the guide body is integrally formed with an inner diameter wall of the cylindrical body, and the pipe member It is related with the structure of the transfer apparatus of the granular material which can move without crushing granular materials, such as a tablet of grains, a pharmaceutical, etc., and granular dog foods.

  Conventionally, as an apparatus for conveying powder particles, for example, in Patent Documents 1 and 2, a spiral fin is provided on the outer periphery of a rotary shaft at the inner diameter portion of a transport pipe (outer cylinder), and this rotary shaft is driven by an external drive motor. The thing which arrange | positioned the screw conveyor which was made to drive and convey a granular material is disclosed.

  Further, in Patent Documents 3 to 5, a powdered granular material introduced into the inlet of the cylindrical body by providing a spiral fin having a height lower than the inner peripheral radius on the inner peripheral wall of the cylindrical body and rotating the cylindrical body. Has been disclosed.

On the other hand, in patent document 6, when storing granular materials, such as feed, in a storage bag, as a device which prevents breakage of granular materials, it arranges a central axis along a cylinder part arranged in the lengthwise direction, Baffle plates are arranged at predetermined intervals in the axial direction of the central axis. It is disclosed that this baffle plate has an appropriate twist angle in the axial direction.
JP-A-8-104414 JP 2000-2111725 A Japanese Examined Patent Publication No. 46-3013 Japanese Patent No. 2664871 JP 2000-72224 A Japanese Patent Laid-Open No. 11-222208

  However, in the configurations of Patent Documents 1 and 2, in order to guarantee the rotation of the screw conveyor, a gap is required between the inner diameter wall of the transport pipe (outer cylinder) and the outer peripheral edge of the spiral fin of the screw conveyor. If the granular material as a transfer article is caught in the gap, the granular material may be chipped or crushed, or the granular material may be clogged in the gap. There is a risk of damage. Furthermore, there is a drawback that it takes time for cleaning because it takes time for cleaning to remove the granular material clogged in the gap.

  Furthermore, both Patent Documents 1 and 2 have a problem that the number of components is increased, such as a configuration for supporting the rotating shaft of the screw conveyor, and the cost is increased.

  On the other hand, according to the configurations of Patent Documents 3 to 5, a through hole along the central axis of the cylindrical body is formed between the inner peripheral edge of the spiral fin in the central portion of the inner diameter of the cylindrical body. When this cylindrical body is arranged vertically, the powder particles fall down vigorously in the through-holes, and the powder and powder during the transportation and transfer of tablets such as grains and pharmaceuticals, granular dog food, etc. There was a defect that the granule was chipped, worn, or crushed, resulting in a defective product or a deterioration (deterioration) in commercial value (quality).

  Even in the configuration of Patent Document 6, there is a problem that powder particles are clogged in the gap between the cylindrical inner peripheral surface and the baffle plate. As a common problem of Patent Documents 1, 2, and 6, powder particles corresponding to the cross-sectional area of the central axis. In order to reduce the falling (passing) area of the body and to secure a predetermined amount of passage of the granular material, there has been a problem that the cylindrical portion has to be enlarged and enlarged.

  The present invention has been made in view of the drawbacks of these conventional techniques, and an object of the present invention is to provide a pipe member that can be integrally formed, is inexpensive, and can be reduced in size, and a transfer device using the pipe member. Is.

  In order to achieve the above object, the pipe member according to the first aspect of the present invention includes a spiral guide body that partitions an inner diameter portion of a cylindrical body in a diametrical direction and is twisted about a central axis of the cylindrical body. The guide body is formed long along the central axis, and the outer peripheral edge of the guide body is continuously connected to the inner diameter wall of the cylindrical body.

  According to a second aspect of the present invention, in the pipe member according to the first aspect, the pipe member according to the first aspect is provided with an inlet for introducing the granular material at the upper end, and an outlet for discharging the granular material at the lower end. It is provided and the said pipe member has been arrange | positioned to at least one part of the conveyance path | route of a granular material.

  According to a third aspect of the present invention, in the granular material transfer device according to the second aspect, the pipe member is disposed in a non-rotating state, and an air vent hole is provided in the wall surface of the cylindrical body.

  Since the outer peripheral edge of the spiral guide body is continuously and integrally joined to the inner peripheral wall of the cylindrical body, the structure of the pipe member of claim 1 is extremely simple. And when the said pipe member is used as a transfer device of a granular material like Claim 2, since a granular material slides down along a spiral guide body, the acceleration of fall is not attached to a granular material. Therefore, the granular material is not cracked or chipped by a drop impact. There is no gap between the outer peripheral edge of the guide body and the inner peripheral wall of the cylindrical body. Therefore, foreign matter such as powder or dust is not caught in the gap as in the past, and it can be held during the transfer of the powder. Or dust is not collected in the gap, and it is hygienic. In addition, compared with the conventional case where a spiral fin is erected around the central axis, the passage area of the powder and granular material can be increased by the cross-sectional area of the central axis, so that the pipe member having the same passage area as the conventional one can be made compact ( Can be thin).

  If the pipe member is arranged in a non-rotating state and an air vent hole is provided in the wall surface of the cylindrical body, the high temperature powder particles passing through the pipe member can be cooled.

  Next, a preferred embodiment of the present invention will be described. In the pipe member 1 according to the present invention, the inner diameter portion of the cylindrical body 2 is partitioned in the diametrical direction, and a spiral guide body 4 twisted around the central axis 3 of the cylindrical body 2 extends along the central axis 3. Long and continuous. The twisting pitch P can be arbitrarily set according to the type of the granular material 5 (see FIG. 4) and the necessary transfer speed at which it can fall without being crushed. An outer peripheral edge 4 a of the guide body 4 is continuously connected to the inner diameter wall 2 a of the cylindrical body 2. 1A is a cross-sectional view taken along a plane passing through the diameter of the cylindrical body 2 and along the central axis 3, and FIG. 1B is a view taken along the line Ib-Ib in FIG. The guide body 4 in FIG. 1 is twisted counterclockwise.

  Since the guide body 4 partitions the inner diameter of the cylindrical body 2 in the diametrical direction, the granular material 5 that passes through one passage (region) 6a and the powder that passes through the other passage (region) 6b in FIG. It does not mix with the granules 5.

  In the embodiment, the cylindrical body 2 and the guide body 4 (pipe member 1) are both thermoplastic resins, and are integrated with a transparent resin material such as polycarbonate, acrylic resin, PET (polyethylene terephthalate resin), nylon resin, polystyrene resin, and the like. As will be described later, the transfer state of the granular material 5 can be easily visually confirmed from the outside, and it becomes easy to confirm the presence or absence of foreign matter or water droplets during the cleaning operation.

  Further, if the cylindrical body 2 and the guide body 4 (pipe member 1) are formed of a resin material (nylon, polyethylene, fluorinated ethylene resin) having a small friction coefficient, the slipperiness of the granular material 5 is improved, and the powder During the sliding movement of the granule 5, the wear of the surface of the granule 5 can be reduced. If the resin material of the pipe member 1 is made of a flexible soft material such as nylon 12, polyethylene resin, vinyl chloride resin, polyurethane resin, or fluorinated ethylene resin, the pipe member 1 can be bent.

  Fig.2 (a)-FIG.2 (e) show the principal part of the apparatus which manufactures the pipe member of this invention. This apparatus is an extrusion molding apparatus for a thermoplastic resin material, and an annular gap (gap) 13 is separated from an inner diameter portion of a die main body 10 having a molten thermoplastic resin material supply port (die inlet) 11 on one side. A cylindrical cylinder 12 is fixedly arranged. An annular passage 12 a that communicates with the outer periphery of the cylinder 12 and the gap 13 is formed in the inner diameter portion of the die body 10. A mandrel 14 connected to the tip of the drive shaft 15 is rotatably disposed on the inner diameter portion of the cylinder 12. As shown in FIG. 2 (c), the mandrel 14 has a conical outlet portion 17 having a diameter that gradually increases from the cylindrical base portion 16 toward the tip, and the circular end surface of the outlet portion 17 has a circular end surface. As shown in FIG. 2 (d), the slit 18 is formed to be recessed over the diameter line. In addition, two passage grooves 19 communicating with both ends of the slit 18 are formed on the outer periphery of the base portion 16 along the axis of the base portion 16 (see FIG. 2C). A plurality (multiple locations) of holes 20 are formed in the outer periphery of the cylinder 12 so as to communicate with the passages 12a and the ends of the two passage grooves 19 in the mandrel 14 (see FIG. 2B).

  The molten thermoplastic resin material sent from the extruder (not shown) to the supply port 11 is removed from the exit of the die body 10 at a constant speed as the cylindrical body 2 from the annular gap 13 through the annular passage 12a. Extruded. At the same time, the molten resin flowing from the passage 12a through the hole 20 enters the inner diameter portion of the cylinder 12, passes through the passage groove 19, and passes from the slit 18 on the diameter line to the inner diameter portion of the cylindrical body 2 as the thin plate-like guide body 4. The outer peripheral edge of the guide body 4 is welded to the inner peripheral wall of the cylindrical body 2 and integrally joined. At this time, the guide body 4 can be formed in a spiral shape by slowly rotating the mandrel 14 together with the drive shaft 15 in a predetermined direction (counterclockwise in the embodiment).

  Further, as shown by a two-dot chain line in FIG. 2D, if another slit 18a is arranged perpendicular to the slit 18, the guide body 4 that partitions the inner diameter portion of the cylindrical body 2 into a radial cross shape. If the slit formed at the tip of the mandrel 14 is selected at intervals of 120 degrees around the rotation center axis of the mandrel 14, the inner diameter portion of the cylindrical body 2 is partitioned by the guide body 4 into a Y shape. You can also. In any of the above cases, the twist of the guide body 4 to be integrally formed on the inner diameter portion of the cylindrical body 2 by the combination of the extrusion speed of the cylindrical body 2, the rotational direction of the mandrel 14 and the rotational speed thereof. Direction and pitch can be set arbitrarily.

  FIG. 3 is an example of a packaging device provided with a transfer device 30 for the granular material 5 using the pipe member 1 of the present invention, and rice, wheat, etc. as an example of the granular material 5 on the frame 30a. A hopper 31 for storing a predetermined amount of each grain and granular feed is provided, and a horizontal cylinder 33 containing a screw conveyor 32 for transferring the granular material 5 in the horizontal direction is provided at the lower end of the hopper 31 with a frame 30. It is supported and arranged. A lower end outlet 31 a of the hopper 31 communicates with the start end of the horizontal cylinder 33. One end of the screw conveyor 32 is provided with a power transmission unit 35 (pulley, endless belt, etc.) from the drive motor 34. The inlet 36 at the upper end of the pipe member 1 supported vertically by the frame 30 a is connected to the downward outlet 33 b at the other end of the horizontal cylinder 33. A support member 38 is provided in the middle of the frame 30a in a state where the upper end opening of the storage bag 37 is expanded. A discharge port 39 at the lower end of the pipe member 1 faces the storage bag 37. Instead of the storage bag 37, a container, a can or the like may be used.

  Thereby, after the granular material 5 in the hopper 31 moves horizontally in the horizontal cylinder 33 by the screw conveyor 32, it reaches the upper end inlet 36 of the vertical pipe member 1 from the lower end outlet 31a. Here, when the granular material 5 is introduced into the inner diameter portion of the pipe member 1, the inner diameter of the cylindrical body 2 is partitioned in the diameter direction by the spiral guide body 4, so that both the passages (regions) 6a, When the granular material 5 enters 6b, the granular material 5 slides down along the inclined guide body 4 within the respective regions, and the granular material 5 is not subject to the acceleration of the fall and is moderate. It falls into the storage bag 37 at a speed. Therefore, the granular material 5 is not cracked or chipped by a drop impact. Further, since the granular material 5 discharged from the discharge port 39 of the pipe member 1 is subjected to a spiral inertia force by the spiral guide body 4, it is discharged toward the outer periphery of the pipe member 1 and is stored in the storage bag 37. The piles of the granular material 5 deposited on the surface are also flattened. You may set the upper end inlet 36 so that the granular material 5 may fall only to one of the said channel | paths (area | region) 6a, 6b.

  The pipe member 1 is not vertical, and may be erected with an inclination of an appropriate angle θ with respect to the horizontal plane 22 as shown in FIG. And in the case of the high temperature granular material 5 like the feed supplied from the dryer, this inclined pipe member 1 is arrange | positioned in a non-rotating state, and an air vent hole is provided in the upper wall surface etc. of the cylindrical body 2 An appropriate number of holes 23 may be provided, and the heat in the passage 6a (6b) may be released from the holes 23 by communicating with outside air. In addition, the pipe member 1 in a non-rotating state can be arranged vertically, and the hole 23 can be provided in a part where the powdered material 5 is not discharged out of the pipe member 1. As described above, when the granular material 5 is passed through only one of the passages 6a (6b), the hole 23 may be formed in a portion communicating with the other passage through which the granular material 5 does not pass.

  FIG. 5 shows an embodiment in which the pipe member 1 of the present invention is used as a transfer device for a sieve device 40 for selecting grains such as rice and wheat as an example of the granular material 5. In this embodiment, the granular material 5 is introduced from the inlet 41 a at the lower end of the vertical bucket elevator 41, and the granular material 5 is discharged from a bucket (not shown) at the upper end discharge portion 41 b of the bucket elevator 41. An inlet 42 at the upper end of the pipe member 1 is connected to the upper end discharge portion 41b. In this embodiment, the pipe member 1 is erected appropriately in an inclined shape with respect to the horizontal plane. A flexible cylindrical cover body 44 connected to the discharge port 43 at the lower end of the pipe member 1 is connected to the upper end inlet 45 a of the container 45 of the sieving device 40. The container 45 is configured to swing by a vibration generator 46.

  Also in this embodiment, the granular material 5 discharged from the upper end discharge portion 41 b of the bucket elevator 41 slides down along the inclined guide body 4 in the cylindrical body 2. Does not stick and falls into the container 45 at a moderate speed. Therefore, the grain (powder body 5) is not cracked, chipped, cracked or the like due to the impact of dropping.

  FIG. 6 shows an embodiment in which the pipe member 1 according to the present invention is used as a transfer device for a packaging device 50 for storing or packaging a predetermined number of tablets such as medicines in a packaging container. The tablets (powder particles 5) produced by tableting at the upper floor part of the factory are stored in the hopper 51 on the second floor, and the lower end discharge port 53 of the pipe member 1 in the standing direction connected to the lower end of the hopper 51 is provided. Connect to downstairs packaging device 50. Also in this case, the tablet (powder particles 5) released from the lower end of the hopper 51 is gently slipped down along the inclined guide body 4 in the cylindrical body 2 from the inlet 52 at the upper end of the pipe member 1. Therefore, the powder body 5 is not accelerated by dropping and falls into the container 45 at a moderate speed. Accordingly, it is possible to prevent accidents such as the tablet (powder body 5) being broken or chipped by the impact of dropping, or the surface of the tablet being scratched.

  In any of the above-described embodiments, the pipe member 1 may be made of a soft material, and the middle portion of the pipe member 1 may be curved. Furthermore, if the pipe member 1 is made of a transparent material, the state of the powder particles 5 falling in the pipe member 1 can be easily visually confirmed. In the pipe member 1 according to the present invention, since the outer peripheral edge of the spiral guide body 4 is continuously and integrally joined to the inner peripheral wall 2a of the cylindrical body 2, the outer peripheral edge of the guide body 4 and the cylindrical body 2 are joined together. Accordingly, there is no inconvenience that foreign matter such as powder or dust is not sandwiched in the gap as in the prior art, and that it can be used during transfer of the powder and granule. Moreover, the unsanitary state by which dust etc. accumulate in a clearance gap for a long time as mentioned above does not generate | occur | produce.

  Since the pipe member 1 of the present invention can integrally form the spiral guide body 4 and the cylindrical body 2, compared with the conventional configuration in which the spiral fin is provided around the central axis, the bearing component of the central axis is provided. Is unnecessary, and the manufacturing cost can be greatly reduced. Moreover, the passage cross-sectional area of the granular material with the inner diameter of the pipe member 1 can be increased by the amount of the absence of the central axis as in the conventional case, and the same amount of transfer per short time as in the conventional case can be achieved with the small diameter pipe member. And a compact transfer device can be provided.

  In the pipe member 1 of the present invention, a plurality of passages communicating in the axial direction of the cylindrical body 2 with the spiral guide body 4 completely separating the inner diameter portion of the cylindrical body 2 into two or more regions. (6a, 6b, etc.) can be formed. Therefore, the granular material or fluid to be heated or cooled is passed through one passage of the inner diameter of the pipe member 1 and a heat medium such as air or water is passed through the other passage through the guide body 4. Since heat can be exchanged, it can be used as a kind of pipe member for heat exchange. In this case, since the guide body 4 is spiral and can be formed much longer than the length of the cylindrical body 2, the heat transfer area can be increased to increase the efficiency of heat exchange. A hole 23 to be drilled in the outer peripheral wall of the cylindrical body 2 can be provided in the vicinity of the start end and the end end of the pipe member 1, and the heat medium can be passed through the hole 23.

  Further, the pipe member of the present invention can be rotated around the central axis by a driving means (not shown) so as to perform the same function as a conventional screw conveyor.

(A) is a longitudinal cross-sectional view of the pipe member 1, and (b) is a cross-sectional view taken along the line Ib-Ib in FIG. 1 (a). (A) is sectional drawing which shows the principal part of the manufacturing apparatus of a pipe member, (b) is IIb-IIb arrow sectional drawing of Fig.2 (a), (c) is a side view of a mandrel, (d) is a figure FIG. 2C is a sectional view taken along the line IIc-IIc in FIG. 2E, and FIG. 2E is a sectional view taken along the line IIe-IIe in FIG. It is a front view of the Example applied to the transfer apparatus of the granular material with respect to the packaging apparatus of bagging. It is a longitudinal cross-sectional view of the pipe member 1 arrange | positioned in the inclined form. It is a front view of the Example applied to the transfer apparatus of the granular material with respect to a sieve apparatus. It is a front view of the Example applied to the transfer apparatus of the granular material with respect to the packaging apparatus of a tablet.

Explanation of symbols

1 Pipe member
DESCRIPTION OF SYMBOLS 2 Cylindrical body 3 Center axis line 4 Spiral guide body 5 Powder body 10 Die body 12 Cylinder 13 Crevice 14 Mandrel 18, 18a Slit 30 Transfer device

Claims (3)

  A spiral guide body is formed along the central axis to partition the inner diameter portion of the cylindrical body in the diametrical direction and twisted around the central axis of the cylindrical body, and the outer peripheral edge of the guide body is the cylindrical body A pipe member characterized in that it is continuously connected to the inner wall of the pipe.   The pipe member according to claim 1 is provided with an introduction port for introducing a granular material at an upper end, and an exhaust port for discharging the granular material at a lower end, and the pipe member is connected to a conveying path of the granular material. An apparatus for transferring a granular material, characterized in that it is arranged at least in part.   The apparatus for transferring a granular material according to claim 2, wherein the pipe member is arranged in a non-rotating state, and an air vent hole is provided in a wall surface of the cylindrical body.

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