JP2004262618A - Screw feeder and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw feeder having a circular sectional surface for feeding powder and grain and so on, which allows easy cleaning of a trough to improve sanitary conditions and prevents the powder and grain from leaking through the gap between an upper trough and a lower trough, and a method of manufacturing the screw feeder at low cost. <P>SOLUTION: The screw feeder incorporates a screw for feeding powder and grain as it rotates. The screw feeder includes a trough having circular sectional surfaces, which is cut out from a ready-made tube, at least part of which is divided into an upper trough and a lower trough, and which has a plurality of upper troughs in the longitudinal direction, a packing placed at a joint part of the upper and lower troughs, and a joint means connecting the upper and lower troughs and easily disassembled. A method of manufacturing the same is also advantageous. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a screw feeder, in particular, emphasizes sanitary properties, for conveying edible powder, the cross-sectional shape surrounding the rotating screw has a circular trough screw feeder, this cross-section The present invention relates to a screw feeder that conveys edible granules having improved sanitary properties by making it easy to disassemble a trough having a circular shape, thereby facilitating cleaning and cleaning of the trough. .
[0002]
[Prior art]
There are two types of screw feeders: a trough having a U-shaped cross-section and a circular trough having a circular cross-section. A screw feeder having a circular trough cross section is used. The screw feeder for transporting such edible powders is conventionally designed to transport only the same edible powders and to be operated continuously, and is used for cleaning and cleaning. Uses a single tubular trough with a circular cross-section, as it is not expected to disassemble and will not disassemble until it needs to be repaired due to wear or failure It is normal that even if the trough can be disassembled into an upper trough and a lower trough, it is not expected to be disassembled for cleaning or cleaning, and the upper and lower troughs are fixed together with bolts etc. ing.
[0003]
If the trough can be disassembled into an upper trough and a lower trough, a steel plate (including a stainless steel plate; the same applies hereinafter) is bent to form a trough having a semicircular cross section, so that it is difficult to manufacture a thick trough. Furthermore, it is very difficult to manufacture the flange provided at the joint between the upper trough and the lower trough on an accurate plane, and even if it is troublesome to process, the upper trough and the lower trough may not be formed. It is almost impossible to make the joints of the upper and lower troughs completely adhere to each other, and it is inevitable that a slight gap is formed at the joint of the upper trough and the lower trough. For this reason, in order to prevent flour and granular material, particularly flour such as milled flour (hereinafter, described as an example of flour) from flowing out of this gap to the outside, a flat rubber packing or the like is interposed between the upper trough and the upper trough. The lower trough was fixed together.
[0004]
The screw feeder of the prior art for transporting edible powdery granules is configured as described above, so that it is unavoidable that the production takes time and costs. Further, it is inevitable that flour or the like is clogged in the gap between the upper trough and the lower trough, and the flour clogged in the gap between the upper trough and the lower trough solidifies over time. To be mixed into the flour being transported. This solidified flour, even if it is the same flour, has solidified with the passage of time, and has become aging and deteriorated flour over a long period of time. If mixed, it becomes a foreign substance.
[0005]
In addition, since the sanitary orientation in the world has been further advanced, even with a screw feeder that conveys edible powders such as flour, even if it is temporarily stopped for about 2 to 3 days, It is desirable to remove the residue by cleaning and washing the inside, and to improve the sanitary property of the screw feeder. Further, when switching the brand of the granular material to be conveyed, it is desirable to perform the same cleaning and cleaning work in order to prevent contamination. However, in the conventional screw feeder, it is difficult to clean and clean the inside of the trough because it takes time to disassemble the trough before cleaning and cleaning.
[0006]
[Patent Document 1]
JP 2001-122421 A
[Problems to be solved by the invention]
In order to solve such a problem, the present invention forms an upper trough and a lower trough by cutting out from a ready-made tube, dividing at least the upper trough into a plurality of pieces in a longitudinal direction, and The trough can be easily disassembled by joining the trough with an easily disassemblable joining means. Even when the trough is temporarily stopped for about two to three days or when the brand is switched, it can be used again. In addition to cleaning and washing the inside of the trough to remove residues and improve the sanitary properties of the screw feeder, it is also configured so that milled flour etc. does not flow out from the gap between the upper trough and the lower trough It is an object of the present invention to provide a screw feeder that conveys powdery and granular materials, and further manufactures such a screw feeder excellent in sanitary properties at a lower cost. It is an object to provide a method for producing a screw feeder to ability.
[0008]
[Means for Solving the Problems]
In order to solve these problems, the screw feeder according to the present invention is a screw feeder having a trough having a circular cross-sectional shape for transporting the granular material, and a screw for transporting the granular material by rotating. With this screw built-in, it is cut out from a ready-made pipe, at least a part is divided into an upper trough and a lower trough, and a cross-sectional shape in which a plurality of the upper troughs are formed in the longitudinal direction is a circular trough. And a packing provided at a joint portion between the upper trough and the lower trough, and a coupling means that can be easily disassembled for coupling the upper trough and the lower trough.
[0009]
Further, the method for manufacturing a screw feeder according to the present invention is a screw feeder having a trough having a circular cross-sectional shape for transporting powder and granules, and a screw for transporting the powder and granules by rotating, and this screw A method for manufacturing a screw feeder, comprising: a trough having a circular cross-sectional shape to be built therein, the trough being divided into an upper trough and a lower trough, and having coupling means for coupling the upper trough and the lower trough. Forming an upper trough main body from a ready-made pipe by cutting out the upper trough main body, and forming a space from which the upper trough main body is cut out as an opening of the lower trough, and opening the upper trough main body and the lower trough opening. The joints for connecting the upper trough body to the opening of the lower trough are integrally fixed around the periphery of the lower trough.
[0010]
Here, it is preferable that the joints are fixed by welding around the openings of the upper trough body and the lower trough, respectively. Further, it is preferable that the upper trough body is cut at an angle of 90 ° to 120 ° with respect to the center of the ready-made tube.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a screw feeder according to the present invention and a method for manufacturing the screw feeder will be described based on preferred embodiments shown in the accompanying drawings. Here, FIG. 1 is a front view of a screw feeder according to an embodiment of the present invention, FIG. 2 is a plan view of the screw feeder, FIG. 3 is a cross-sectional view taken along the line AA, and FIG. FIG. 5 is a sectional view taken along line AA of the second embodiment, FIG. 6 is an exploded sectional view of an upper trough and a lower trough of the second embodiment, and FIG. FIG. 8 is a plan view of the connecting means of the embodiment, and FIG.
[0012]
As shown in FIGS. 1 and 2, the screw feeder 10 according to this embodiment supplies edible powders, for example, powders such as flour, from a supply unit 12 on the right side, and a trough 14 having a circular cross-sectional shape. The granules are conveyed to the left in the figure by a screw 20 driven by a motor 16 and a speed reducer 18, and the granules conveyed from the discharge section 22 are discharged. .
[0013]
Here, in this embodiment, the lower trough 24 constituting the trough 14 of the screw feeder 10 has a circular cross-sectional shape having an opening at the top as shown in FIG. The lower troughs 24 (see FIG. 1) are formed. On the other hand, as shown in FIG. 4, the upper trough 26 has an arc-shaped cross-sectional shape, and divides the entire length of the screw feeder 10 into four parts, and three places excluding the position where the supply unit 12 is arranged are located in the upper part. It is divided into three troughs 26a, 26b, 26c, and each of the upper troughs 26a, 26b, 26c is independently removable.
[0014]
Filters 28 and 30 for sucking and discharging air moving together with the conveyed granular material are integrally fixed to the rightmost upper trough 26a and the leftmost upper trough 26c. The unloading portion 22 is integrally fixed to the lower trough 24 at a lower position of the lower trough 24. In this embodiment, as shown in FIG. 2, the supply unit 12 has a hopper-shaped opening having a wide upper portion, and can be cleaned or washed as it is. Therefore, an upper trough is provided. Absent.
[0015]
In the present invention, as described above, the trough 14 is divided into the upper trough 26 and the lower trough 24, and the upper trough 26 is divided into a plurality of pieces in the longitudinal direction and can be easily disassembled by coupling means (details will be described later). ) Is different from the prior art in that it has all the necessary structures for the trough 14 as in the prior art as a whole. In this embodiment, only the ribs 32 provided on the lower trough 24 are illustrated as ribs for preventing deformation of the upper trough 26 and the lower trough 24, but additional ribs may be added as necessary. Of course.
[0016]
FIG. 3 is a sectional view of the screw feeder 10 taken along a line AA in FIG. 1, and FIG. 4 is a sectional view showing the upper trough 26 and the lower trough 24 in an exploded manner. The trough 14 shown in this embodiment is formed from a ready-made steel pipe (preferably, a stainless steel pipe) having a required diameter, for example, a standard drawn steel pipe to form an upper trough body 34, and from this ready-made pipe, an upper trough body is formed. The space formed by cutting out the portion 34 is used as an opening 36 of the lower trough 24. In the step of cutting out the upper trough body 34 from a ready-made steel pipe, an arbitrary cutting method such as fusing can be adopted depending on the diameter and thickness of the steel pipe. When the diameter of the steel pipe is small and it is difficult to cut out the upper trough main body 34 from the steel pipe to a predetermined size, the upper trough main body 34 and the lower trough 24 having the opening 36 are separately manufactured. You can also.
[0017]
A joining portion for assembling the upper trough 26 with the lower trough 24 to form an integrated trough 14 is provided around the upper trough main body 34 and around the opening 36 of the lower trough 24. It is fixed as one body. In this embodiment, a mounting rib 38 having a mounting hole for a thumb screw 42 is provided around the upper trough body 34, and a screw hole for the thumb screw 42 is provided around the opening 36 of the lower trough 24. The mounting seats 40 are provided by welding, respectively. A seal member such as a flat rubber packing 44 is arranged between the mounting rib 38 and the mounting seat 40 so that the flour or the like does not flow out from the gap to the outside or accumulate in the gap. So that it is sealed.
[0018]
The sealing member is not limited to the rubber packing 44 having a flat plate shape. Rather, in order to prevent flour or the like that has been milled from flowing out of the gap or accumulating in the gap, the mounting rib 38 and the mounting seat are not used. Although it is desirable to use a seal member having a specific cross-sectional shape that is optimal for completely sealing the gap between the seal member 40 and the seal member 40, use of such a seal member having a special cross-sectional shape is expensive. In order to make it more inexpensive, a flat rubber packing 44 is employed in place of the sealing member having a special sectional shape.
[0019]
FIGS. 5 to 8 show an embodiment in which a latch lever mechanism 46 is employed in place of the thumb screw 42 as a connecting means that allows the upper trough 14 and the lower trough 24 to be easily disassembled. As shown in FIGS. 7 and 8, the latch lever mechanism 46 includes a rotatable latch lever 48 and a receiving seat 50. In this embodiment, the latch lever 48 is mounted on the mounting rib 38 of the upper trough 14, and the receiving seat 50 is mounted on the mounting seat 56 provided on the lower trough 24. Fixed.
[0020]
When the upper trough 14 is fixed to the lower trough 24 by the latch lever mechanism 46, as shown in FIG. 5, a rubber packing 44 is arranged via the mounting seat 40 of the lower trough 24, and the mounting ribs of the upper trough 14 are attached. The rubber packing 44 is pressed by 38 and fixed by the latch lever mechanism 46.
[0021]
Here, the angle at which the upper trough body 34 is cut out of a ready-made tube is preferably 90 ° to 120 ° with respect to the center of the tube, and the length of the upper trough body 34 is 1.5 to 1.5 mm in diameter. It is desirable to make it 2.5 times. If the angle at which the upper trough main body 34 is cut out is too small or the length is too short, even if the upper trough 26 is removed from the lower trough 24, cleaning and cleaning becomes difficult because the opening becomes narrow, and the angle is too large. If the length is too long, the lower trough 24 may be deformed or twisted, increasing the risk that the screw 20 disposed inside may come into contact with the inner surface of the trough, or the gap between the screw 20 and the inner surface of the trough may be excessively large. As a result, the efficiency of conveying the flour or the like is reduced.
[0022]
When the length of the trough is less than 10 times the diameter, it is desirable to use a pipe of schedule 20 or less for SGP steel pipe and a pipe of schedule 20S or less for stainless steel pipe. When the diameter exceeds 10 times the diameter, it is desirable to use a pipe having a schedule larger than 20 (20S) for both the SGP steel pipe and the stainless steel pipe.
[0023]
Since the screw feeder 10 of the present embodiment is configured as described above, as is apparent from FIGS. 1 to 3 and FIG. 5, by combining the upper trough 26 and the lower trough 24, the cross-sectional shape is circular. A trough 14 can be formed. As described above, the screw 20 is disposed in the trough 14, and the rotation of the screw 20 conveys a granular material such as flour.
[0024]
Here, the upper trough 26 and the lower trough 24 constitute the trough 14 of the screw feeder 10 by being vertically assembled, and the upper trough main body is attached to the mounting seat 40 fixed to the lower trough 24 via the rubber packing 44. The trough 14 having a circular cross-sectional shape can be formed by assembling the mounting rib 38 fixed to 34 and fixing it with the thumb screw 42 or the latch lever mechanism 46. The fixing at the joint (the mounting rib 38 and the mounting seat 40) is not limited to the thumb screw 42 or the latch lever mechanism 46, and any other easily disassembled fixing means can be used.
[0025]
Since the screw feeder 10 of the present embodiment is configured as described above, the upper trough body 34 having a predetermined shape is cut out from a ready-made tube, and the opening 36 of the lower trough 24 is cut out from the same ready-made tube. Therefore, usually, the space where the upper trough main body 34 is cut out from the pipe can be used as the opening 36 of the lower trough 24, and even a thick trough can be easily manufactured. Therefore, it is not necessary to bend a steel plate (stainless steel plate) to form a trough having a semicircular cross section. Even a thick-wall trough can be easily manufactured by using an inexpensive standard-made tube or other ready-made tube. Can be manufactured.
[0026]
Further, since the mounting rib 38 and the mounting seat 40 are fixed to the periphery of the opening portion 36 of the upper trough body 34 and the lower trough 24 by welding or the like, the processing accuracy of the bonding portion is increased, and an expensive special shape is formed. There is no need to use packing, and a flat rubber packing cut out from the cheapest rubber plate can be used. And since this joining part is fixed by the fixing means which can be easily disassembled, the upper trough 26 and the lower trough 24 can be easily disassembled, and at least the upper trough 26 is divided into a plurality in the longitudinal direction. By dividing, the plurality of upper troughs 26 can be easily disassembled individually, and the inside of the trough 14 can be easily cleaned and washed to remove residues. For this reason, even during a temporary stoppage or brand change for about two to three days, the trough 14 is cleaned or washed to remove the residue before use again, and the sanitary property of the screw feeder 10 is improved. Can be improved.
[0027]
In the embodiment described above, packing or a connecting means having a specific structure is used as a packing used at a joint between the upper trough and the lower trough, or a connecting means for integrally connecting the upper trough and the lower trough. Although shown as an example, as is apparent from the above description, the scope of the present invention is not limited to the example described in this specification, and various types are provided without departing from the gist of the present invention. Of course, it is possible to make improvements and changes.
[0028]
【The invention's effect】
The screw feeder of the present invention has the above-described configuration, and since the upper trough body and the lower trough are cut out from a ready-made tube, there is no need to bend the metal plate to form the upper trough and the lower trough. It is possible to use an off-the-shelf tube such as a standardized product manufactured at a low price, and a thick-walled trough can be easily manufactured. Furthermore, since the packing is not a specially shaped packing, but a flat rubber packing cut out from the cheapest rubber plate can be used, a screw that is inexpensive and can easily clean and clean the inside of the trough is used. A feeder and a method for manufacturing the feeder can be provided.
[0029]
Also, the upper trough and the lower trough can be easily disassembled, and at least the upper trough can be easily disassembled individually by dividing the upper trough into a plurality in the longitudinal direction. It is easy to clean and wash the inside and remove the residue in the trough. Therefore, even after a temporary suspension for about two to three days or when changing brands, the trough should be cleaned or washed to remove any residue before use again, thereby improving the sanitary properties of the screw feeder. Can be.
[Brief description of the drawings]
FIG. 1 is a front view of a screw feeder according to one embodiment of the present invention.
FIG. 2 is a plan view corresponding to FIG.
FIG. 3 is a sectional view taken along line AA of FIG. 1;
FIG. 4 is an exploded sectional view of an upper trough and a lower trough.
FIG. 5 is a sectional view taken along line AA of FIG. 1 showing another embodiment.
FIG. 6 is an exploded sectional view of an upper trough and a lower trough corresponding to the embodiment of FIG. 5;
FIG. 7 is a plan view showing another embodiment of the coupling means.
FIG. 8 is a sectional view of the embodiment of FIG. 7;
[Explanation of symbols]
Reference Signs List 10 screw feeder 12 supply section 14 trough 16 motor 18 speed reducer 20 screw 22 discharge section 24 lower trough 26 upper trough 28, 30 filter 32 rib 34 upper trough main body 36 opening 38 mounting rib 40 mounting seat 42 thumb screw 44 rubber packing 46 Latch lever mechanism 48 Latch lever 50 Receiving seat 52 Engaging claw 54 Claw portion 56 Mounting seat

Claims (4)

A screw feeder having a circular trough having a circular cross-sectional shape for conveying the granular material,
A screw that conveys the granular material by rotating,
With this screw incorporated, cut out from a ready-made tube, at least a part is divided into an upper trough and a lower trough, and the cross-sectional shape in which a plurality of the upper troughs are formed in the longitudinal direction is a circular trough. ,
Packing provided at a joint between the upper trough and the lower trough,
A screw feeder comprising: an easily disassembled connecting means for connecting the upper trough and the lower trough. A screw feeder having a circular trough having a circular cross-sectional shape for transporting the granular material, and a screw for transporting the granular material by rotating, the cross-sectional shape incorporating the screw has a circular trough, At least a portion of the trough is divided into an upper trough and a lower trough, and a method of manufacturing a screw feeder having a coupling unit that couples the upper trough and the lower trough,
A cut-out upper trough body of a predetermined shape is formed from a ready-made tube, and a space from which the upper trough body is cut out is formed as an opening of the lower trough,
A method for manufacturing a screw feeder, wherein a joint for connecting the upper trough main body to the opening of the lower trough is integrally fixed around the opening of the upper trough main body and the lower trough. 3. The method according to claim 2, wherein the joints are fixed by welding around the openings of the upper trough body and the lower trough. 4. 4. The method according to claim 2, wherein the upper trough main body is cut at an angle of 90 ° to 120 ° with respect to a center of the ready-made tube. 5.

Images