JP6901842B2 - Stirrer and its operation method - Google Patents

Description

The present invention relates to a stirrer for stirring raw materials charged into a container and a method for operating the stirrer.

In various fields such as chemistry, food, medicine, and energy, agitators widely used for stirring raw materials to produce desired products are generally cylindrical containers into which raw materials are charged. And a stirring blade (agitator blade) rotatably provided in the container, and the raw material in the container is stirred by rotating the stirring blade.

These stirrers are used for the purpose of stirring and mixing the raw materials and stirring and mixing the raw materials and granulating. Some agitators for granulating raw materials are provided with secondary blades called crushing blades (chopper blades) on the side of the container in order to improve the granulation efficiency.

Further, the container of such a stirrer generally has a container body and a lid member capable of opening and closing the container body, and the lid member is opened to open the inside of the container by manual work by an operator. The structure is such that the inner surface of the container, that is, the inner surface of the container body and the inner surface of the lid member can be cleaned. In particular, when the raw material to be agitated has viscosity or wettability, a large amount of the raw material tends to adhere to the inner surface of the container during stirring. When a large amount of raw material may adhere to the inner surface of the container in this way, the work of opening the lid member to open the inside of the container and manually removing the adhered raw material may be frequently performed. ..

However, opening the lid member to open the inside of the container and manually removing the raw material adhering to the inner surface of the container reduces the work efficiency, and especially in the pharmaceutical field, the high-purity powder Manual work is not preferable to prevent foreign substances from being mixed in for processing, and when processing raw materials with high pharmacological activity, it is not preferable to prevent health damage to workers due to the raw materials, and further, a container. It is also not preferable for preventing the diffusion of raw materials to the outside. Therefore, there is a need for a scraper device (scraping blade device) that can sufficiently scrape the raw material adhering to the inner surface of the container without manually removing the raw material.

Therefore, for example, a stirrer capable of scraping (removing) the raw material adhering to the inner surface of the container without opening the lid member to open the inside of the container has been proposed.

For example, Patent Document 1 has a scraper (scraping blade) that rotates along the vicinity of the inner surface of a cylindrical container to scrape off the raw material adhering to the inner surface of the container, and has two rotating shafts of stirring blades capable of planetary motion. A stirrer is disclosed in which a scraper fixing arm is connected to the scraper fixing arm, and a scraper is connected to the scraper fixing arm via a rotation shaft. Further, in Patent Document 1, the stirring device fixes the position of the rotating shaft in order to make the clearance between the inner surface of the container and the scraper constant, and the inverted L-shaped scraper is above the upper limit of the paste (raw material) liquid level. It is disclosed that the inverted L-shaped protrusion is in contact with the inner surface of the container at the position of, and is not in contact with the inner surface of the container below the upper limit of the paste liquid level.

When such a scraper is provided in the stirrer, especially in the food field and the pharmaceutical field, from the viewpoint of safety and health, the scraper is worn and wear debris is mixed into the raw material, and the scraper is attached. It is strongly desired to take measures to prevent members such as bolts for the purpose from being mixed into the raw material.

Regarding the wear of the scraper, for example, the aspect in which the scraper is fixed in a state of being strongly pressed against the inner surface of the container is desirable because the progress of the wear of the scraper can be promoted. In this regard, the scraper disclosed in Patent Document 1 keeps the clearance with the inner surface of the container constant, so that wear can be suppressed.

However, in a mode in which a clearance is secured between the scraper and the inner surface of the container, the effect of removing the raw material by the scraper cannot be sufficiently obtained. In particular, since the container of the stirrer is generally manufactured by can manufacturing, it is difficult to manufacture the container with high precision and dimensional accuracy, and the inner surface of the container has small irregularities, waviness, waviness, etc. When the scraper rotates along the inner surface of the container around the axis of rotation, the gap between the scraper and the inner surface of the container changes depending on the location, and the raw material adhering to the inner surface of the container may not be sufficiently scraped off in a portion having a large gap. In particular, the larger the stirrer, the more difficult it is to manufacture with high precision, and the more likely it is that it becomes difficult to scrape off the adhered raw material with a scraper. Therefore, there is room for improvement in the scraper according to Patent Document 1 in improving the effect of removing the raw material while suppressing the wear of the scraper.

Further, the scraper disclosed in Patent Document 1 is attached so as to extend from a rotation shaft arranged near the inner surface of the cylindrical container to the inner surface side of the container while extending to one side in the direction along the inner surface of the cylindrical container. Therefore, when the scraper is rotated to one side, the effect of removing the raw material can be expected, but when it is reversed, the effect of removing the raw material cannot be expected. Therefore, if there are protrusions such as temperature sensors and crushing blades on the side wall of the container, the rotation range of the scraper is limited to prevent interference with these protrusions, and the raw material adhered to the inner surface of the container. The area that cannot be removed becomes relatively large. In this respect as well, the scraper according to Patent Document 1 has room for improvement in improving the effect of removing raw materials.

Further, regarding the member for attaching the scraper, in order to prevent such a member from being mixed into the raw material, it is desirable to suppress the number of parts of the member as much as possible. Here, for example, Patent Document 1 describes that a scraper may be connected to a rotating shaft, and the rotating shaft may have a mechanism for adjusting the rotation width with a spring, a damper, or the like.

However, such an embodiment is not desirable because the number of parts increases and the possibility of mixing of members increases. Further, the scraper can return the raw material removed from the inner surface of the container to the raw material being stirred, but since a part of the raw material adheres to the scraper, it is necessary to wash it regularly. Even in this case, it is desirable that disassembly and cleaning can be easily performed by reducing the number of parts.

Japanese Unexamined Patent Publication No. 2006-272139

The present invention has been made in view of the above-mentioned problems in the prior art, and can suppress wear of the scraper, and even if the inner surface of the container is deformed, the raw material adhered to the inner surface of the container. It is an object of the present invention to provide a stirrer capable of effectively removing the above-mentioned material and a method for operating the stirrer.

The present invention also provides a stirrer and an operating method thereof that can easily perform disassembly and cleaning while preventing the mounting members from being mixed into the raw material by reducing the number of parts for mounting the scraper. The purpose is to do.

In order to solve the above-mentioned problems, the first aspect of the present invention is a stirrer for stirring raw materials, which is a container having a substantially rotationally symmetrical shape for storing the raw materials therein, and the container. A scraper arm extending along the inner surface and rotationally driven around the central axis of the container, and a scraper connected to the scraper arm and adhering to the inner surface of the container are provided. When the scraper arm is rotationally driven around the central axis and the end of the scraper moves while contacting the inner surface of the container, the end of the scraper follows the shape of the inner surface of the container. It is characterized in that it is configured so that it can be displaced in a direction substantially perpendicular to the inner surface of the container.

In a second aspect of the present invention, in the first aspect, the scraper extends in a longitudinal direction along the inner surface of the container so that the scraper can be displaced in a direction substantially perpendicular to the inner surface of the container. It is characterized by having a slit.

A third aspect of the present invention further comprises, in the first or second aspect, a connecting plate having connecting pins for connecting the scraper to the scraper arm, the scraper in the direction of rotation of the scraper arm. Has a thin, substantially flat plate-like outer shape with the direction extending along the scraper arm as the longitudinal direction, and the connecting plate has a thin thickness in the rotation direction of the scraper arm, and the scraper arm has a thin shape. It has an elongated substantially flat plate-shaped outer shape with the direction extending along the longitudinal direction, and the scraper is sandwiched between the scraper arm and the connecting plate, pressed by the connecting pin, and connected to the scraper arm. The end of the scraper on the inner surface side of the container projects from the end of the scraper arm and the connecting plate on the inner surface side of the container to the inner surface side of the container.

In a fourth aspect of the present invention, in the third aspect, the connecting pin is metallurgically bonded to the connecting plate, and the scraper and the scraper arm each have an insertion hole through which the connecting pin is inserted. The scraper is connected to the scraper arm by inserting the connecting pin into the insertion hole arranged corresponding to the connecting pin of each of the scraper and the scraper arm. It is a feature.

In a fifth aspect of the present invention, in the fourth aspect, the connecting pin has a substantially circular collar on the head, and the insertion hole formed in the scraper arm allows the collar to pass through. The connecting pin which has a circular collar hole and an elongated hole which is continuously integrally formed below the collar hole and whose width is smaller than the diameter of the collar and is inserted into the insertion hole formed in the scraper. Is inserted into the collar hole formed in the scraper arm and then lowered to bring the back surface of the collar of the connecting pin into contact with the surface of the scraper arm to connect the scraper to the scraper arm. It is characterized in that it is configured to do so.

In a sixth aspect of the present invention, in any of the third to fifth aspects, the connecting plate further comprises a fixing pin, and the scraper has a fitting hole into which the fixing pin is fitted. The scraper is configured to be connected to the connecting plate by fitting the fixing pin into the fitting hole.

A seventh aspect of the present invention is characterized in that, in the sixth aspect, the scraper includes an annular body made of an elastic material having a fitting hole into which the fixing pin is fitted.

In an eighth aspect of the present invention, in any of the third to seventh aspects, the scraper and the connecting plate are divided into a plurality of parts in a direction in which the scraper arm extends along the inner surface of the container. It is characterized by that.

A ninth aspect of the present invention is characterized in that, in any one of the first to eighth aspects, the scraper arm can rotate in both directions with respect to the central axis.

A tenth aspect of the present invention is the ninth aspect, wherein the container is provided with a crushing blade on a side portion, and the rotation direction of the scraper arm is reversed in the vicinity of the crushing blade. , Characterized by.

In the eleventh aspect of the present invention, in any one of the first to tenth aspects, the container extends radially from the center of the container to the inner surface of the side of the container at the bottom of the container, and around the center axis. The scraper arm is provided with a stirring blade that rotates to stir the raw material, and the scraper arm extends along the inner surface of the container to the vicinity of the upper end of the outer peripheral portion of the stirring blade.

A twelfth aspect of the present invention is characterized in that, in the eleventh aspect, a rotation shaft for rotating the crushing blade is provided near the upper end of the outer peripheral portion of the stirring blade.

In order to solve the above-mentioned problems, the method of operating the stirrer according to the thirteenth aspect of the present invention is the method of operating the stirrer according to any one of the first to twelfth aspects, and the raw material is put into the container. A step of rotating the scraper arm around the central axis along the inner wall of the container and moving the scraper in the circumferential direction while contacting the inner surface of the container. To do.

According to the present invention, a stirrer capable of suppressing wear of the scraper and effectively removing raw materials adhering to the inner surface of the container even when the inner surface of the container is deformed and its operation. A method can be provided.

Further, according to the present invention, by suppressing the number of parts for mounting the scraper to a small number, a stirrer capable of easily disassembling and cleaning while preventing the mounting members from being mixed into the raw material and a method for operating the stirrer. Can be provided.

It is a vertical sectional view which shows the schematic structure of the 1st Embodiment of the stirrer which concerns on this invention. It is an arrow view of the cross section AA of FIG. It is the B part enlarged view of FIG. It is the C part enlarged view of FIG. FIG. 3 is a view of FIG. 3 viewed from the back surface side. It is an arrow view of the cross section DD of FIG. 3 (the container is not shown). It is an arrow view of the cross section EE of FIG. (A) is a front view showing the concept of a scraper arm. (B) is an arrow view of the cross section FF of (a). (A) is a front view showing the concept of a scraper. (B) is an arrow view of the cross section GG of (a). (A) is a front view showing the concept of a connecting plate. (B) is an arrow view of the cross section HH of (a). (C) is a right side view of the third connecting plate. In the first embodiment, it is a figure which shows the schematic procedure in the case of connecting a 3rd scraper to a scraper arm, (a) is a front view which shows the state which connected the 3rd scraper and a 3rd connecting plate, and Sectional view, (b) is a front view and a cross-sectional view showing a state in which the connecting pin incorporating the third scraper is inserted into the flange hole of the scraper arm, and (c) is the connecting pin lowered along the elongated hole. It is a front view and the cross-sectional view which shows the state which it inserted into a long hole, and the surface of a scraper arm was held down by the back surface of a flange. (A) is a front view which shows the schematic structure of the scraper in the 2nd Embodiment of the stirrer which concerns on this invention. (B) is an arrow view of the cross section JJ of (a). It is an arrow view (the container is not shown) of the part corresponding to the cross section DD of FIG. 3 in the 2nd Embodiment of the stirrer which concerns on this invention. In the second embodiment, it is a figure which shows the schematic procedure in the case of connecting a 3rd scraper to a scraper arm, (a) is the front view which shows the state which connected the 3rd scraper and the 3rd connecting plate, (B) is a front view showing a state in which the connecting pin incorporating the third scraper is inserted into the flange hole of the scraper arm, and (c) is the connecting pin lowered along the elongated hole and inserted into the elongated hole. , It is a front view which shows the state which held down the surface of a scraper arm by the back surface of a collar.

Hereinafter, embodiments of the stirrer and its operating method according to the present invention will be described with reference to the drawings.

<First Embodiment>
As shown in FIGS. 1 to 7, the stirrer 1 in the first embodiment includes a container 2 in which raw materials are charged and stored, a stirring blade 6 for stirring the raw materials, a crushing blade 8, and a scraper arm 21. And a scraper 11 attached to the scraper arm 21.

The container 2 has a substantially rotationally symmetric shape, has a lid 5 that can be opened and closed on the ceiling, and by closing the lid, the inside can be isolated from the outside and sealed. A drive shaft 22 that rotates around a central axis that is substantially the same as the rotationally symmetric central axis of the container 2 is connected to the lid 5.

The stirring blade 6 is arranged at the bottom of the container 2 and is driven by a motor (not shown) arranged outside the container 2 via the stirring blade drive shaft 12 so as to be around the rotationally symmetric central axis of the container 2. Rotate to stir the raw material. In the present embodiment, three stirring blades 6 are provided at equal intervals in the circumferential direction, but the quantity is appropriately changed according to the type of raw material, the size of the stirring machine 1, and the like. ..

The crushing blade 8 is an outer peripheral portion inside the container 2, is arranged above the stirring blade 6, and is rotated via a rotation shaft 9 by a crushing blade motor 10 arranged outside to be a raw material. At the time of mixing, the raw material is extruded toward the center of the container 2 to improve the dispersibility, and at the time of granulation, it has a function of crushing the lumps to prepare the grains.

The scraper arm 21 is connected to the drive shaft 22, extends downward along the inner surface of the container 2 including the lid 5 to the vicinity of the upper end of the outer peripheral portion of the stirring blade 6, and is an arm arranged above the container 2. The motor 23 rotates around the central axis substantially the same as the rotationally symmetric central axis of the container 2 via the drive shaft 22. Hereinafter, unless otherwise specified, the inner surface of the container 2 shall include the inner surface of the lid 5.

A scraper 11 is attached to the scraper arm 21 to scrape off the raw material adhering to the inner surface of the container 2. In the vertical cross section, the tip of the scraper 11 is in linear contact with the inner surface of the container 2 along the extending direction of the scraper arm, and by rotating the scraper arm in the circumferential direction, the scraper 11 has a rotation range of the container 2. The raw material adhering to the inner surface can be scraped off and removed.

Hereinafter, the structure of the scraper arm 21, the structure of the scraper 11, the structure of connecting the scraper 11 to the scraper arm 21, and the like will be described in detail.

As shown in FIGS. 1, 3, 8 and the like, the scraper arm 21 has a substantially outer shape in which the thickness of the scraper arm 21 in the rotation direction is thin and the scraper arm 21 extends downward along the scraper arm 21 in the longitudinal direction. It has an elongated substantially flat plate shape. Since the scraper arm 21 has a flat plate shape having a thin thickness in the rotation direction, when the scraper 11 or the like is connected and rotated in the horizontal direction to scrape off the raw material firmly adhered to the inner surface of the container 2. A flange 13 having a height in the rotation direction is provided in order to increase the rigidity against a reaction force or the like.

As shown in FIG. 9 and the like, the scraper 11 has an elongated substantially flat plate shape in which the thickness of the scraper arm 21 in the rotation direction is thin and the direction extending downward along the scraper arm 21 is the longitudinal direction. It has an outer shape. In the present embodiment, the scraper 11 corresponds to the ceiling or the lid 5, the side inclined portion and the side upright portion, respectively, according to the inner surface inclination angle of the container 2 in the vertical cross section, and the first scraper 11a , The second scraper 11b and the third scraper 11c are divided into three parts.

The stirrer 1 of the present embodiment is provided with a connecting plate 24 for sandwiching and connecting the scraper 11 to the scraper arm 21 (see FIG. 10 and the like).

As shown in FIG. 10 and the like, the connecting plate 24 has an elongated substantially flat plate shape in which the thickness of the scraper arm 21 in the rotation direction is thin and the direction extending downward along the scraper arm 21 is the longitudinal direction. Has the outer shape of. In the present embodiment, like the scraper 11, the connecting plate 24 also corresponds to the lid 5, the side inclined portion, and the side upright portion, respectively, according to the inclination angle of the inner surface of the container 2 in the vertical cross section. , A first connecting plate 24a, a second connecting plate 24b and a third connecting plate 24c.

The size of the scraper 11 is set to be larger than that of the scraper arm 21 and the connecting plate 24 so that the tip portion of the scraper 11 can come into contact with the inner surface of the container 2 and scrape off the adhered raw material. As shown, when sandwiched between the scraper arm 21 and the connecting plate 24, the container 2 projects toward the inner surface side, and the tip thereof contacts (contacts) the inner surface of the container 2 with a predetermined pressing force. There is.

Next, using the third scraper 11c as an example, a connection structure to the scraper arm 21 using the corresponding connection plate 24c and the like will be described.

As shown in FIG. 10, connecting pins 25 and fixing pins 26 are arranged on the surface of the third connecting plate 24c on the third scraper 11c side. From the viewpoint of preventing falling during stirring operation, easy removal of foreign matter during cleaning, etc., the connecting pin 25 and fixing pin 26 are connected by a third connection by metallurgical joining such as welding or brazing, or joining with an adhesive. It is bonded to the plate 24c. Since there is a possibility that the powder may fall and bolts or the like that are difficult to remove the powder by entering the screw portion or the like are not used, the powder product is not adversely affected and maintenance and the like are facilitated. In particular, it is highly effective when a stirrer is used in the production of foods and pharmaceuticals that dislike contamination and process expensive powders. In consideration of the certainty of bonding and the like, metallurgical bonding is preferable.

The connecting pin 25 has a disc-shaped collar 27 on its head. The connecting pin 25 is fitted into an elongated hole 29 (see FIG. 6 and the like) formed in the scraper arm 21 described later, and the back surface of the collar 27 and the front surface of the scraper arm 21 are fitted to each other, and the back surface of the collar 27 and the first The third scraper is connected to the scraper arm by sandwiching the scraper arm 21 and the third scraper 11c between the three connecting plates 24c. Therefore, the dimensions of the portion of the connecting pin 25 below the collar 27 are approximately the same as the total thickness of the scraper arm 21 and the third scraper 11c, and the connecting pin 24 is formed in the elongated hole 29. It is said to be a length that can be fitted.

The fixing pin 26 is for fixing the third scraper 11c and the third connecting plate 24c in order to prevent them from moving with each other, and is arranged in two places in order to prevent flat rotation and the like. It is installed. Therefore, the height of the fixing pin 26 is substantially the same as or smaller than the thickness of the third scraper 11c.

As shown in FIG. 9, the third scraper 11c is formed with an insertion hole 31 through which the collar 27 of the connecting pin 25 can be inserted and a fitting hole 30 into which the fixing pin 26 is fitted.

The scraper 11 can be manufactured from a polymer material such as Teflon (registered trademark. Substance name: polytetrafluoroethylene), polyethylene, urethane or the like. In particular, Teflon is excellent in chemical stability and thermal stability, and since it is a material with low frictional resistance and low wear, it slides on the surface of the container 2 made of metal. It is suitable as a material for the scraper 11. Further, since Teflon is a material that is harmless to the human body, it is preferable to manufacture the scraper 11 with Teflon when it is necessary to construct the scraper 11 with a material that is harmless to the human body, such as when handling foods and pharmaceuticals. ..

Since the container 2 is generally manufactured by making a can using a metal material, the manufacturing accuracy is not high, and the inner surface is often low in smoothness and wavy or wavy. Therefore, the scraper arm 21 is rotated horizontally. It is necessary to make the scraper 11 follow the shape of the inner surface of the container 2 (for example, unevenness).

Here, the larger the stirrer 1 is, the larger the deformation of the container is, and although Teflon and the like have higher elasticity than the metal, it cannot be said that it is sufficient to follow the shape of the container 2 and deform.

Therefore, the tip portion of the scraper 11 in contact (contact) follows the change in reaction force due to the change in shape such as the unevenness of the inner surface of the container 2, and the scraper 11 is in the direction perpendicular to the inner surface of the container 2. That is, a slit 33 (a slit 33a in the longitudinal direction and a slit 33b in the width direction of the scraper 11) and an opening 35 continuous with the pin insertion hole 31 are provided so that the scraper 11 can be displaced in the width direction.

The scraper 11 is divided into three first, second and third scrapers 11a, 11b and 11c in the longitudinal direction, a gap is provided on the inner surface side of the container 2 between them, and the divided scrapers 11a and 11b are provided. By forming slits 33b in the width direction, the scraper 11 has a structure capable of dealing with unevenness in the vertical direction of the inner surface of the container 2.

Further, in each of the divided scrapers 11a, 11b, and 11c, a gap space 36 is formed in the middle portion of the pair of pin insertion holes 30 on the rear side of the slit 33a (the side of the scraper 11 farther from the inner surface of the container 2). By narrowing the width of the corresponding range, the scraper 11 is easily deformed in the direction perpendicular to the inner surface of the container 2 in the divided scrapers 11a, 11b, and 11c. It has a structure that can handle vertical unevenness on the inner surface.

In a state where the scraper 11 is connected to the scraper arm 21 by the connecting plate 24 via the connecting pin 25 by the method described later, the scraper 11 can be deformed in the width direction according to the shape change of the inner surface of the container 2. A gap having a size that does not restrain the deformation of the scraper 11 is provided between the outer peripheral surface of the connecting pin 25 and the inner peripheral surface of the elongated hole 29.

As shown in FIG. 8, the scraper arm 21 is connected to a drive shaft 22 that rotates to rotate (turn) the scraper arm 21 horizontally, and the collar 27 of the head of the connecting pin 25 passes through the scraper arm 21. It is provided with an insertion hole 32 having a collar hole 28 capable of forming a collar hole 28 and an elongated hole 29 that is continuously integrally formed and extends below the collar hole 28. The width of the elongated hole 29 is set to be smaller than the diameter of the collar 27 and larger than the outer diameter of the connecting pin 25. Further, the length of the connecting pin 25 from the back surface of the collar 27 to the front surface of the connecting plate 24 is substantially the same as the total thickness of the scraper 11 and the scraper arm 21, and the connecting pin 25 is lowered. The size is set so that the back surface of the collar 27 can be fitted to the front surface of the scraper arm 21.

Further, in addition to the above, the width of the elongated hole 29 is such that the scraper 11 follows the shape (unevenness, etc.) of the inner surface of the container 2 between the outer peripheral surface of the connecting pin 25 and the inner peripheral surface of the elongated hole 29. A gap having a size that does not restrain the deformation is provided when the deformation is performed.

When connecting the third scraper 11c to the scraper arm 21, first, the collar 27 of the heads of the two connecting pins 25 provided on the surface of the third connecting plate 24c corresponds to the third scraper 11c. It is connected by passing through the pin insertion hole 31 to be projected to the surface of the third scraper 11c (FIG. 11 (a)). The scraper 11c corresponding to the connecting pin 25 arranged on the rear row side of the third connecting plate 24c (the arrangement on the side closer to the inner surface of the container 2 is called the front row and the arrangement on the distant side is called the back row). Since the gap space 36 is arranged in the portion and there is no pin insertion hole, the connecting pin on the rear row side is not connected to the scraper 11c and is exposed.

After that, the collar 27 on the head of the three connecting pins 25 (two on the front row side and one on the back row side) is passed through the collar hole 28 on the upper side of the corresponding pin insertion hole 32 of the scraper arm 21 to pass the scraper arm. It is projected to the surface of 21 (FIG. 11 (b)).

After that, the third scraper 11c and the third connecting plate 24c are lowered together to fit the connecting pin 25 into the elongated hole 29, and the back surface of the collar 27 and the front surface of the scraper arm 21 are fitted (FIG. 11 (FIG. 11). c)). As a result, the third scraper 11c is sandwiched between the scraper arm 21 and the third connecting plate 24c, and the third scraper 11c is connected to the scraper arm 21.

The scraper arm 21 can rotate around the central axis of the container 2 in both directions. As a result, the scraper 11 can be brought close to the rotating shaft 9 of the crushing blade 8 from both sides (see FIG. 2), and the inner surface of the container 2 above the stirring blade 6 in the vertical direction is almost adhered by the scraper 11. The raw material can be scraped off. Since the outer peripheral portion of the stirring blade 6 is arranged at a position substantially closest to the inner surface of the container 2, the raw material adhering to the inner surface of the container 2 in the range below the stirring blade 6 in the vertical direction is removed by the stirring blade 6. Can be removed. Further, since the rotating shaft 9 is arranged at a position closest to the upper side of the outer peripheral portion of the stirring blade 6, the adhered raw material in most of the inner surface of the container 2 can be removed.

Further, in the stirrer 1 according to the present embodiment, the scraper 11 long along the vertical direction abuts (contacts) substantially vertically with the inner surface of the container 2 in the horizontal cross section, and the unevenness of the inner surface of the container 2 and the like Since the container 2 can be swirled in close contact with the inner surface in accordance with the change in shape, even a raw material having high adhesion to the inner surface can be effectively scraped and removed.

Further, the parts and the like constituting the stirrer 1 according to the present embodiment are basically only the scraper 11 and the connecting plate 24, which are relatively large parts, except for the scraper arm 21, and the connecting pins 25 and the like are It is integrated with the connecting plate 24, the number of parts is minimized, and maintenance and management are easy.

Further, by mounting the scraper 11 (11a, 11b, 11c) as described above, the first scraper 11a cannot come into contact with the lid plate and slide upward, so that the scraper 11 (11a, 11b) cannot be slid upward during operation. , 11c) does not float and fall off.

<Second embodiment>
The stirrer according to the second embodiment will be described with reference to FIGS. 12 to 14.

The stirrer according to the second embodiment uses a scraper 11'which is a modified example instead of the scraper 11 in the stirrer according to the first embodiment. Therefore, the overall configuration of the stirrer in the second embodiment using the scraper 11'of the modified example is basically the same as that of the above-described embodiment. I will explain mainly. Therefore, hereinafter, the second embodiment is the same as the above-mentioned first embodiment unless there is a contradiction or the like.

As shown in FIG. 12, the scraper 11'in the second embodiment also has an elongated flat plate shape having a substantially outer shape similar to that of the scraper arm 21 like the scraper 11 in the first embodiment. Further, also in the second embodiment, the scraper 11'corresponds to the ceiling or the lid 5, the side inclined portion and the side upright portion, respectively, according to the inner surface inclination angle of the container 2 in the vertical cross section. The scraper 11a', the second scraper 11b', and the third scraper 11c'are divided into three parts.

The scraper 11'in the second embodiment is provided with a disk-shaped annular body 34 having a fixing pin fitting hole 30'in which the fixing pin 26 is fitted in the central portion. The annular body 34 is fitted into the annular body fitting hole 37 formed in the scraper 11', and the fixing pin 26 is fitted into the fixing pin fitting hole 30' formed in the annular body 34 (FIGS. 12 to 12 to 12). See FIG. 14). When connecting the scraper 11c'and the connecting plate 24, the annular body 34 may be fitted into the annular body fitting hole 37 and then the fixing pin 26 may be inserted and fitted, and conversely, the annular body 34 may be fitted. After inserting and fitting the fixing pin 26 into the fixing pin fitting hole 30'of the body 34, the annular body 34 may be inserted and fitted into the annular body fitting hole 37 integrally with the fixing pin 26.

Since the scraper 11'in the second embodiment does not have the slit 33 and the opening 35 formed in the scraper 11 in the first embodiment, the scraper 11 follows the unevenness of the surface of the container 2 and the like. 'Is not a deformable structure. Therefore, the annular body 34 is manufactured of an elastic body, and the annular body 34 can be deformed to follow the unevenness of the surface of the container 2. Since it is preferable that the elastic body can undergo large elastic deformation, it is possible to use an elastomer such as vulture rubber (natural rubber, synthetic rubber) or a thermosetting resin-based elastomer (urethane rubber, silicon rubber, fluororubber, etc.). it can.

The inner diameter of the pin insertion hole 31'formed in the scraper 11'in the second embodiment is the connecting pin 25 so that the scraper 11'can be displaced according to the unevenness of the surface of the container 2. It is the same as in the first embodiment that it is set with a gap between it and the outer diameter of the above (see FIG. 14).

The method of connecting the scraper 11'and the scraper arm 21 in the second embodiment is the same as that of the first embodiment, and the method of connecting to the scraper arm 21 will be described below by taking the third scraper 11c'as an example. To do.

When connecting the third scraper 11c'to the scraper arm 21, first, the heads of the three connecting pins 25 (two on the front row side and one on the back row side) provided on the surface of the third connecting plate 24c. The collar 27 of the portion is connected by passing through the corresponding pin insertion hole 31'of the third scraper 11c'and protruding to the surface of the third scraper 11c' (FIG. 14 (a)).

After that, the collar 27 of the head of the three connecting pins 25 is passed through the collar hole 28 on the upper side of the corresponding pin insertion hole 32 of the scraper arm 21 and protrudes to the surface of the scraper arm 21 (FIG. 14 (b). )).

After that, the third scraper 11c'and the third connecting plate 24c are lowered together to fit the connecting pin 25 into the elongated hole 29, and the back surface of the collar 27 and the front surface of the scraper arm 21 are fitted (FIG. 14). (C)). As a result, the third scraper 11c'is sandwiched between the scraper arm 21 and the third connecting plate 24c, and the third scraper 11c'is connected to the scraper arm 21.

The structure provided with the slit 33 in the first embodiment and the structure provided with the elastic annular body 34 in the second embodiment can also be combined.

1 Stirrer 2 Container 3 Bottom 4 Side 5 Lid 6 Stirring blade 8 Crushing blade 9 Rotating shaft 10 Crushing blade motor 11 Scraper 11a in the first embodiment First scraper 11b in the first embodiment 2nd scraper 11c in the first embodiment 3rd scraper 11'in the 1st embodiment Scraper 11a in the 2nd embodiment 1st scraper 11b in the 2nd embodiment 2nd in the 2nd embodiment Scraper 11c'Third scraper in the second embodiment 12 Stirring blade drive shaft 13 Flange 21 Scraper arm 22 Drive shaft 23 Arm motor 24 Connecting plate 24a First connecting plate 24b Second connecting plate 24c Third Connecting plate 25 Connecting pin 26 Fixing pin 27 Flange 28 Fitting hole 29 Long hole 30 Fixing pin fitting hole 30'in the first embodiment Fixing pin fitting hole 31 in the first embodiment Scraper connecting pin insertion hole 31'Scraper connecting pin insertion hole 32 in the second embodiment Pin insertion hole for scraper arm 33 Slit 34 Ring 35 Opening 36 Gap space 37 Ring fitting hole

Claims (10)

A stirrer for stirring raw materials
A container having a substantially rotationally symmetric shape for storing the raw material inside the container,
A scraper arm that extends along the inner surface of the container and is rotationally driven around the central axis of the container.
A scraper connected to the scraper arm and for removing the raw material adhering to the inner surface of the container is provided.
When the scraper arm is rotationally driven around the central axis and the end of the scraper moves while contacting the inner surface of the container, the end of the scraper follows the shape of the inner surface of the container. It is configured so that it can be displaced in a direction approximately perpendicular to the inner surface of the.
A connecting plate with connecting pins for connecting the scraper to the scraper arm is further provided.
The scraper has an elongated substantially flat plate shape having a thin thickness in the rotation direction of the scraper arm and a longitudinal direction extending along the scraper arm.
The connecting plate has an elongated substantially flat plate shape having a thin thickness in the rotation direction of the scraper arm and a longitudinal direction extending along the scraper arm.
The scraper is sandwiched between the scraper arm and the connecting plate, pressed by the connecting pin, and connected to the scraper arm.
The end of the scraper on the inner surface side of the container projects from the end of the scraper arm and the connecting plate on the inner surface side of the container to the inner surface side of the container.
The connecting plate further comprises a fixing pin
The scraper has a fitting hole into which the fixing pin is fitted.
The scraper is configured to be connected to the connecting plate by fitting the fixing pin into the fitting hole.
The scraper is a stirrer including an annular body made of an elastic material having a fitting hole into which the fixing pin is fitted. The stirrer according to claim 1, wherein the scraper has a slit having a longitudinal direction extending along the inner surface of the container so that the scraper can be displaced in a direction substantially perpendicular to the inner surface of the container. The connecting pin is metallurgically bonded to the connecting plate.
The scraper and the scraper arm each have an insertion hole into which the connecting pin is inserted.
Claim 1 or 2 in which the scraper is connected to the scraper arm by inserting the connecting pin into the insertion hole arranged corresponding to the connecting pin of each of the scraper and the scraper arm. The stirrer described in. The connecting pin has a substantially circular brim on the head and has a substantially circular collar.
The insertion hole formed in the scraper arm has a substantially circular collar hole through which the collar can pass, and an elongated hole which is continuously integrally formed below the collar and whose width is smaller than the diameter of the collar. ,
The connecting pin inserted into the insertion hole formed in the scraper is inserted into the collar hole formed in the scraper arm and then lowered to lower the back surface of the collar of the connecting pin to the scraper. The stirrer according to claim 3 , wherein the scraper is configured to be brought into contact with the surface of the arm to connect the scraper to the scraper arm. The stirrer according to any one of claims 1 to 4 , wherein the scraper and the connecting plate are divided into a plurality of parts in a direction in which the scraper arm extends along the inner surface of the container. The stirrer according to any one of claims 1 to 5 , wherein the scraper arm can rotate in both directions with respect to the central axis. The container is provided with crushing blades on the side.
The stirrer according to claim 6 , wherein the scraper arm is configured to reverse the rotation direction in the vicinity of the crushing blade. The container is provided with a stirring blade at the bottom of the inside thereof, which extends radially from the center of the container to the inner surface of the side portion and rotates around the central axis to stir the raw material.
The stirrer according to any one of claims 1 to 7 , wherein the scraper arm extends along the inner surface of the container to the vicinity of the upper end of the outer peripheral portion of the stirring blade. The stirrer according to claim 8 , wherein a rotating shaft for rotating the crushing blade is provided near the upper end of the outer peripheral portion of the stirring blade. The method for operating the stirrer according to any one of claims 1 to 9.
The process of putting raw materials into the container and
A method of operating a stirrer, comprising a step of rotating the scraper arm around the central axis along the inner wall of the container and moving the scraper in the circumferential direction while contacting the scraper with the inner surface of the container.

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