JP6934411B2 - Stirrer - Google Patents

Description

The present invention relates to a stirrer equipped with a scraper.

Conventionally, for example, there is a stirring device disclosed in Patent Document 1. This stirring device is connected to a cylindrical stirring container for accommodating agitated substances such as different kinds of liquids or liquids and solid powders, a stirring arm (first stirring blade) for stirring the stirred objects inside the stirring container, and a stirring arm. It is equipped with a scraper that scrapes off the agitated material adhering to the inner wall surface of the agitating container. The stirring container has a cylindrical shape. The stirring arm is a horseshoe-shaped anchor blade that is rotatably supported around the central axis of the stirring vessel. A plurality of stirring blades (second stirring blades) are provided on the inner portion of the stirring arm, while a plurality of connecting portions are connected to the outer portion of the stirring arm close to the inner wall surface of the stirring container as a portion for connecting the scraper. A part is provided. The scraper is a thin plate-shaped member made of synthetic resin, synthetic rubber, or the like, and a plurality of scrapers are arranged between the inner wall surface of the stirring container and the outer portion of the stirring arm. Each scraper is provided with a connecting portion that can be connected to the connecting portion of the stirring arm, and the stirring arm and the scraper have a pin shaft portion in a planar view circular hole provided in these connecting portions. By being inserted and supported, they are connected so as to be relatively swingable with this pin as a support shaft.

In the above-mentioned stirring device, the agitated material contained in the stirring container flows in the stirring container as the stirring arm rotates. When this agitated material has a relatively high viscosity, there is a problem that the agitated material adheres to the inner wall surface of the stirring container. However, since the scraper rotates integrally with the stirring arm and slides against the inner wall surface, the inner wall surface The agitated material adhering to the scraper is efficiently scraped off by the scraper.

However, although the possibility of the stirring device is extremely low, it cannot be denied that the pin inserted and supported in the hole of the connecting portion falls off from the hole of the connecting portion during the operation of the stirring device.
For example, when a stirrer flows toward the upper part of the stirrer in the stirrer, it cannot be denied that the pin is lifted by the interaction between the pin and the stirrer and the pin falls out of the hole.

In order to solve this problem, in the stirring device disclosed in Patent Document 2, a stirring container for accommodating the stirred material, a stirring arm for stirring the stirred material inside the stirring container, and a stirring arm are connected to each other. A stirring device including a scraper for scraping agitated material adhering to the inner wall surface of the stirring container. The stirring arm and the scraper each have a connecting portion provided with a hole, and a pin shaft is provided in each of the holes. By inserting and supporting the portion, the pin is connected as a support shaft, and the shaft portion of the pin engages with the peripheral edge of the hole provided in the connecting portion of the stirring arm or the scraper to prevent the pin from falling off. and convex portions are provided a plurality of for preventing, multiple convex portions are formed in mutually different directions with respect to the radial direction of the shaft portion of the pin, provided on the connecting portion of the stirring arms and to a scraper The peripheral wall of the formed hole is provided with a recess extending along the axial direction of the hole.

Normally, when inserting the shaft portion of the pin into the hole provided in the connecting portion of the stirring arm and the scraper, the pin is inserted to a predetermined depth of the hole so that the convex portion of the pin passes through the concave portion of the hole, and then the pin is inserted to a predetermined depth. , The inserted pin is rotated to shift the positions of the convex portion of the pin and the concave portion of the hole, and the convex portion of the pin is engaged with the peripheral edge of the hole. By the above operation, the pin is engaged and supported at a predetermined position of the hole, and the pin is prevented from falling off. However, when the number of convex portions per pin is one, when the pins are rotated by receiving some external force during the operation of the stirring device and the positions of the convex portions and the concave portions match, the convex portions are engaged. It will be in a disengaged state. In this state, if the pin is lifted by the interaction with the agitated material, the possibility that the pin falls out of the hole cannot be denied.

On the other hand, as in the stirring device disclosed in Patent Document 2, the number of convex portions per pin is two or more, and the convex portions are in different directions with respect to the radial direction of the shaft portion of the pin. If it is formed in, the pin will rotate by receiving some external force during the operation of the stirring device, and even if some of the convex parts are disengaged, they will not match the position of the concave part. The convex part of the is maintained in the engaged state. As a result, the pin is not lifted even if the pin and the agitated material interact with each other, and the pin can be reliably prevented from falling off.

JP-A-2002-326027 Japanese Unexamined Patent Publication No. 2016-175027

However, from the viewpoint of the manufacturing cost of the stirring device, it is desirable to more easily and surely prevent the pin from falling off to ensure a high degree of safety.

The stirring device of the present invention is connected to the stirring container for accommodating the stirred material, the stirring arm for stirring the stirred material inside the stirring container, and the stirring arm, and adheres to the inner wall surface of the stirring container. A stirring device including a scraper for scraping the agitated material, the stirring arm and the scraper each have a connecting portion provided with a hole, and a shaft portion of a pin is inserted and supported in the hole. As a result, the pin is connected as a support shaft, and the shaft portion of the pin engages with the peripheral edge portion of the hole provided in the connecting portion of the stirring arm or the scraper to prevent the pin from falling off. protrusions are provided for, the peripheral wall of the hole formed in the respective connecting portions of the stirring arms and to a scraper, a recess is provided extending along the axial direction of the hole, the recess, When the stirring arm is in operation, the stirring arms are arranged in different directions with respect to the radial direction of the holes (claim 1).

In a preferred embodiment of the present invention, during operation of the stirring arm, the angle of radial recesses of the stirring arms and to a scraper is arranged, is 45 ° to 135 ° (claim 2).

Further, the peripheral wall of the hole formed in the respective connecting portions of the stirring arms and to a scraper, recesses extending along the axial direction of the bore is provided with a plurality (claim 3).

Normally, when inserting the shaft portion of the pin into the hole provided in the connecting portion of the stirring arm and the scraper, the pin is inserted to a predetermined depth of the hole so that the convex portion of the pin passes through the concave portion of the hole, and then the pin is inserted to a predetermined depth. , The inserted pin is rotated to shift the positions of the convex portion of the pin and the concave portion of the hole, and the convex portion of the pin is engaged with the peripheral edge of the hole. By the above operation, the pin is engaged and supported at a predetermined position of the hole, and the pin is prevented from falling off. However, if the pin is rotated by receiving some external force during the operation of the stirring device and the positions of the convex portion of the pin and the concave portion of the hole match, the convex portion of the pin is disengaged. In this state, if the pin is lifted by the interaction between the pin and the agitated material, the possibility that the pin will fall out of the hole cannot be denied.

On the other hand, like the stirring device of the present invention, the recesses in the holes of the stirring arm and the scraper slide on the inner peripheral surface of the stirring container when the stirring arm is in operation, that is, the scraper is attached to the stirring arm. during and are arranged in mutually different directions with respect to the radial direction of the hole, in a state where the concave portion of the holes are shredded at the boundary of the stacking direction of the stirring arms and to a scraper. As a result, the pin is rotated by receiving some external force during the operation of the stirrer, and the convex portion of the pin is disengaged. Since the portion is locked by the shredded portion of the recess of the hole, it is possible to reliably prevent the pin from falling off.

In a preferred embodiment of the present invention, during operation of the stirring device, the angle of the radial recess of the stirring arms and to a scraper is arranged, it is set to 45 ° to 135 °.
When the angle is set in the above range, the recess of the stirring arms and to a scraper holes is reliably shredded at the boundary of the stacking direction, it can be reliably prevented from falling off the pin.

More preferably, when the formed angle is set to 80 ° to 100 °, a material having low elasticity is used for the scraper, or a highly viscous stirring object having a large drag against the scraper is treated to make holes. Even when the angle formed by the concave portion of the hole is shifted from the specified value, the concave portion of the hole can be reliably cut and the pin can be prevented from falling off more reliably.
Further, it is possible to match the recess of the stirring arms and to a scraper without greatly swinging the scraper, the step of inserting the pin into the hole can be simplified.

In another preferred embodiment of the present invention, the peripheral wall of the hole formed in the connecting portion of the stirring arms and to a scraper, concave and convex portions extending along the axial direction of the hole it is provided with a plurality of ..
In such a configuration, a relatively large void is formed between the hole and the pin at the connecting portion of the stirring arm and the scraper. On the other hand, a plurality of convex portions formed on the inner peripheral surface of the hole abut on the shaft portion of the pin, and as a result, the pin serving as the support shaft is inserted and supported in the hole of the connecting portion without loosening, and the stirring arm is supported. The scraper is properly connected. On the other hand, when the stirring arm and the scraper are washed with, for example, a cleaning liquid, the cleaning liquid flows through the voids formed between the holes and the pins, and the agitated material that has entered between them is easily removed by the cleaning liquid. Thereby, even when the stirring arm and the scraper are connected to each other, these connecting portions can be easily cleaned.

Other features and advantages of the present invention will become more apparent with the detailed description given below with reference to the accompanying drawings.

It is an external perspective view which shows one Embodiment of the stirring apparatus which concerns on this invention. It is a top view which shows the stirring arm and scraper provided in the stirring device shown in FIG. It is a top view (left) and an enlarged view (right) which show the connection structure of the scraper in the stirrer shown in FIG. It is a perspective view which shows the connection method of the scraper in the stirrer shown in FIG. FIG. 1 is a cross-sectional view (top) and an enlarged view (bottom) showing a method of engaging the scraper pins in the stirring device shown in FIG. FIG. 5 is an external perspective view showing a state in which the stirring arm of the stirring device shown in FIG. 1 is moved above the stirring container. It is a top view which shows the swingable range of the scraper of the stirrer shown in FIG. It is a schematic diagram which shows the positional relationship of the concave part of the stirring arm and the scraper when the scraper of the stirring device shown in FIG. 5 is in the state of (a) and (b). It is the schematic which shows the modification of this invention.

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings. 1 to 8 show an embodiment of the stirring device according to the present invention. The stirrer X is for using a liquid and a liquid as raw materials for industrial chemical products, chemicals, cosmetics, foods, etc., or a mixture of a liquid and a powder as a stirrer, and finely dispersing the components of the stirrer. Is. As shown in FIGS. 1 and 2, the stirring device X includes a stirring container 1, a driving mechanism 2, a stirring arm 3, and a plurality of scrapers 4.

As shown in FIGS. 1 and 2, the stirring container 1 is composed of a bottomed cylindrical container. The stirring container 1 has an upper opening 1A and a cylindrical inner wall surface 1B. A stirred product is housed inside the stirring container 1.

As shown in FIG. 2, the drive mechanism 2 includes a drive motor 20, a speed reducer 21, a drive shaft 22, and a support member 23. The drive motor 20 and the speed reducer 21 are mounted on the upper center portion of the support member 23. The drive shaft 22 is connected to the drive motor 20 via a speed reducer 21, penetrates the support member 23, and extends below the support member 23. The support member 23 is arranged so as to straddle the upper opening 1A of the stirring container 1 and is fixed to the peripheral edge of the upper opening 1A. As a result, the drive shaft 22 is arranged inside the stirring container 1 and rotates around the central axis S of the stirring container 1 as the drive motor 20 operates.

As shown in FIG. 2, the stirring arm 3 is a rod-shaped member bent in a substantially U-shape in front view, and has a base portion 3A close to the inner bottom surface of the stirring container 1 and both ends of the base portion 3A along the central axis S. It has a pair of arm portions 3B extending upward and adjacent to the inner wall surface 1B at a predetermined interval, and a plurality of stirring blades 30 supported by the arm portions 3B. The intermediate portion of the base portion 3A is fixed to the lower end of the drive shaft 22. A plurality of stirring blades 30 are supported side by side at predetermined intervals in the direction of the central axis S on the inner portion of the arm portion 3B on the central axis S side. A plurality of bracket members 5 are fixed to the outer portion of the arm portion 3B in a predetermined interval in the direction of the central axis S as a connecting portion for connecting the scraper 4. Such a stirring arm 3 is integrated with the drive shaft 22 and rotates around the central axis S to efficiently stir the stirred material contained in the stirring container 1 so as to be a homogeneous mixture. Can be done.

As shown in FIG. 2, the scraper 4 is for scraping the agitated material adhering to the inner wall surface 1B, and the pin 6 is supported on the outer portion of the arm portion 3B via the bracket member 5 and the pin 6. It is swingably connected to the arm portion 3B, and a plurality of them are arranged between the arm portion 3B and the inner wall surface 1B. The scraper 4 is made of, for example, a synthetic resin, synthetic rubber, or a fluorine-coated engineering plastic having excellent wear resistance and corrosion resistance, and is integrated with a thin plate-shaped blade portion 4A in contact with the inner wall surface 1B and the blade portion 4A. It has a connecting portion 4B that is formed and connected to the bracket member 5. Although the example in which the bracket member 5 is used is shown in FIG. 2, a portion corresponding to the bracket member 5 may be provided on the arm portion 3B, and this portion and the scraper 4 may be connected to each other. In the present application, the bracket member 5 constitutes a part of the arm portion 3B.

As shown in FIG. 3, the blade portion 4A is arranged so that the front side in the traveling direction, which moves relative to the inner wall surface 1B, is closer or in contact with the inner wall surface 1B. When the blade portion 4A scrapes off the agitated material adhering to the inner wall surface 1B, the blade portion 4A swings backward in the traveling direction due to the drag force received from the agitated material, and the tip of the blade portion 4A on the front side in the traveling direction is the inner wall surface. Contact 1B. As a result, the blade portion 4A can efficiently scrape off the agitated material adhering to the inner wall surface 1B while sliding contact with the inner wall surface 1B. The connecting portions 4B form a pair that can be fitted to the bracket member 5, and project to the side opposite to the side facing the inner wall surface 1B of the blade portion 4A.

As shown in FIG. 4, the connecting portion 4B and the bracket member 5 are provided with holes 40 and 50 for inserting and supporting the pin 6 in the direction along the central axis S in a state of being fitted to each other. Further, the peripheral walls of the holes 40 and 50 are provided with recesses 40A and 50A having a U-shaped cross section. The recesses 40A and 50A extend along the central axis direction of the holes 40 and 50 and penetrate from the upper surface to the lower surface of the connecting portion 4B and the bracket member 5.
On the other hand, the pin 6 is composed of a shaft portion 6A and a head portion 6B, and a convex portion 6C for engaging with the peripheral portions of the holes 40 and 50 to prevent the pin from falling off is provided near the tip of the shaft portion 6A. ing.
When the shaft portion of the pin is inserted into the holes 40 and 50 provided in the connecting portion 4B and the bracket member 5, the pin 6 is inserted into the holes 40 and 50 so that the convex portion 6C of the pin passes through the recesses 40A and 50A of the hole. Then, the pin 6 in the inserted state is rotated to shift the positions of the convex portion 6C and the concave portions 40A and 50A so that the convex portion 6C engages with the peripheral edge portion of the hole. By the above operation, the pin 6 is engaged and supported at a predetermined position of the holes 40 and 50, and the pin 6 is prevented from falling off.

However, as shown in FIG. 5B, when the pin 6 is rotated by receiving some external force during the operation of the stirring device X and the positions of the convex portions 6C and the concave portions 40A and 50A match, the convex portions 6C are engaged. It will be in a disjointed state. In this state, if the pin 6 is lifted by the interaction with the agitated material, the possibility that the pin 6 falls out of the holes 40 and 50 cannot be denied.

On the other hand, in the stirring device X of the present invention, when the stirring arm is in operation, that is, when the scraper 4 is mounted on the stirring arm 3 and the scraper 4 slides in contact with the inner peripheral surface of the stirring container 1. as shown in FIG. 5 (a), the recess 40A of the recess 50A and the scraper stirring arm and is disposed in mutually different directions with respect to the radial direction of the hole, the recess 50A and to a scraper stirring arms The recess 40A of the above is in a state of being cut off at the boundary portion in the stacking direction.
As a result, even if the pin is rotated by receiving some external force during the operation of the stirring device and the pin is lifted even if the interaction between the pin and the agitated object occurs, the convex portion of the pin is locked by the shredded portion of the concave portion. Therefore, it is possible to reliably prevent the pin from falling off.

As shown in FIG. 6, the insertion into the holes 40, 50 of the shaft portion 6A of the pin carries a support member 23 in a state of elevated above the upper opening 1A of the stirring vessel 1.
Specifically, when the support member 23 is lifted, the scraper 4 does not face the inner wall surface 1B, and as shown in FIG. 7, the scraper 4 is in a swingable state.
In this state, the direction of the recess 40A of the recess 50A and to a scraper stirring arm at the position of (b) in FIG. 7, if set to match, as shown in FIG. 8 (b), the pin protrusions 6C becomes possible to pass through the recesses of the stirring arms and to a scraper, insertion into holes 40, 50 of the shaft portion 6A of the pin is possible.

On the other hand, the direction positions of the recesses 50A and to a scraper recess 40A of the stirring arm (a) of FIG. 7, is set to different as shown in FIG. 8 (b), 7 (b) after the shaft portion 6A position of the pin into the holes 40, 50 of the insertion, by swinging the scraper at a position of (a) in FIG. 7, the recess 50A and the recess 40A is a stacked layer direction of the scan scraper stirring arms It will be in a state of being shredded at the boundary of.
As a result, as shown in FIG. 5A, even if the pin is rotated by receiving some external force during the operation of the stirring device and the pin 6 interacts with the agitated material, the pin 6 is lifted. Since the convex portion of the pin 6 is locked by the shredded portion of the concave portion, it is possible to prevent the pin 6 from falling off.

Here, when the support member 23 is lowered to the upper opening 1A of the stirring container 1, the scraper 4 faces the inner wall surface 1B, and the scraper 4 cannot move. Thus, it states that the boundary of the recess 40A of the recess 50A and to a scraper stirring arms are disrupted is, without being released even when the operation of the agitating arms 3, reliably preventing the detachment of the pin 6 can.

In another preferred embodiment of the present invention, as shown in FIG. 9, the peripheral wall of the agitating arms 3 and holes 40 and 50 provided in the connecting portion of the scan scraper 4, extending along the axial bore A plurality of concave portions 40A, 50A and convex portions 40B, 50B are provided. One of the recesses 40A and 50A has a groove depth larger than that of the other recesses 40A and 50A, and the convex portion 6C of the pin 6 can pass through the recesses 40A and 50A.
With such a structure, when the shaft portion 6A of the pin 6 is inserted into the holes 40 and 50, the holes 40 and 50 are formed while a gap is formed between the shaft portion 6A and the inner peripheral surfaces of the holes 40 and 50. The plurality of convex portions 40B and 50B are in line contact with the shaft portion 6A of the pin 6 with respect to the inner peripheral surface of the pin 6, so that the convex portions 40B and 50B are stably supported at the center of each of the holes 40 and 50. As a result, the scraper 4 of the present embodiment is swingably connected to the bracket member 5 fixed to the outer portion of the arm portion 3B with the pin 6 as a support shaft.

Since the present embodiment has the above structure, when the stirring device is used to clean the entire stirring arm 3 with a cleaning liquid such as water, the holes 40 and 50 are formed even when the stirring arm 3 and the scraper 4 are connected to each other. Since a relatively large void is formed between the shaft portion 6A and the shaft portion 6A, the cleaning liquid flows into the void and is discharged, so that the residue of the agitated material that has entered the inside of the holes 40 and 50 is cleanly removed by a water stream. be able to.

In the present embodiment, the concave portions 40A and 50A and the convex portions 40B and 50B are provided four by four as an example, but the shaft portion 6A of the pin 6 can be stably supported by the holes 40 and 50. As long as the concave portions 40A and 50A and the convex portions 40B and 50B may be provided by two or more.

The stirring device according to the present invention is not limited to the above-described embodiment. The specific configuration of each part of the stirring device according to the present invention can be freely redesigned.

X Stirrer S Central axis 1 Stirrer container 1B Inner wall surface 2 Drive mechanism 3 Stirrer arm 4 Scraper 4A Blade part 4B Connecting part 40 Hole 40A Recessed part 40B Convex part 5 Bracket member (connecting part)
50 holes 50A concave 50B convex 6 pins 6A shaft 6B head 6C convex

Claims (3)

A stirring container for accommodating the agitated material and
A stirring arm for stirring the agitated material inside the stirring container, and
A stirring device including a scraper connected to the stirring arm and scraping off the stirred material adhering to the inner wall surface of the stirring container.
The stirring arm and the scraper each have a connecting portion provided with a hole, and the shaft portion of the pin is inserted and supported in these holes to be connected with the pin as a support shaft.
The shaft portion of the pin, and the convex portion is provided for preventing falling off of the pin engages the periphery of the hole formed in the connecting portion of the stirring arm or scraper,
The peripheral wall of the hole formed in the respective connecting portions of the stirring arms and to a scraper, is provided with recesses extending along the axial direction of the bore,
The stirring device is characterized in that the recesses are arranged in different directions with respect to the radial direction of the holes when the stirring arm is in operation. During operation of the stirring device, the angle of the radial recess of the stirring arms and to a scraper is arranged, stirrer according to claim 1, characterized in that the 45 ° to 180 °. The peripheral wall of the hole formed in the respective connecting portions of the stirring arms and to a scraper, stirring device according to claim 1, characterized in that the recess extending along the axial direction of the bore is provided with a plurality.

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