JP4652104B2 - Cement composition mixer - Google Patents

Description

The present invention, cement and the water, to the mixer of a cement composition for agitating the cement composition containing the gravel or sand.

Japanese Patent Laid-Open No. 6-166019 Japanese Utility Model Publication No. 6-7909 Japanese Utility Model Publication No. 7-15311

For a cement composition mixer that mixes gravel and sand with cement and water, for example, as shown in Patent Document 1 and Patent Document 2, a tank for stirring the cement composition , a rotating shaft, and a motor for rotating the rotating shaft, In general, those provided with an arm connected to the rotating shaft and a stirring blade provided at the tip of the arm are provided. Such a mixer rotates a rotating shaft with a motor and rotates a stirring blade to stir the cement composition in the tank.
In the mixer shown in Patent Document 2, the arm extends substantially horizontally from the rotating shaft, and the upper part of the stirring blade reaches the mouth near the upper part of the tank.
For this reason, the diameter of the opening of the tank is constricted smaller than the lower part of the tank so that the cement composition does not overflow from the tank by the above stirring.
However, the resistance to rotation of the stirring blade in the cement composition in which gravel or sand is mixed is large, and in reality, the mixer of Patent Document 2 is not suitable for use in such a cement composition in which gravel is mixed. That is, in an object to be stirred containing gravel or the like, as seen in the above-mentioned Patent Document 1, the stirring blade is generally small with respect to the tank, and is generally suppressed to a height of half or less of the depth of the tank. Is.

In the general mixer used for stirring the cement composition containing gravel shown in Patent Document 1, the stirring blade is located on the bottom side of the tank in the tank, and the state where the bottom of the tank is swung by rotation However, at this time, a part of the cement composition rises along the inner peripheral surface of the tank due to the centrifugal force due to rotation, and adheres to a position above the stirring blade on the inner peripheral surface of the tank. Therefore, when the rotation of the stirring blade is stopped in such a state, there is a problem that the inner peripheral surface of the tank is stuck during the period.

On the other hand, in mortars that do not contain gravel, such as resin mortar agitation and premix mortar, a mixer found in Patent Document 3 is also used.
In the mixer shown in this Patent Document 3, as shown in FIG. 1, a bar-shaped scraping member (side sweeping portion) is provided on the top of a rectangular stirring blade (bottom sweeping plate portion), and the above-mentioned It is formed to scrape off the mortar adhering to the upper part of the stirring blade on the inner peripheral surface of the tank. That is, in this patent document 3, the scraping member is shown to protrude above the stirring blade from above the outer end of the rotation diameter of the stirring blade.

However, as described above, the resistance of the cement composition containing gravel is large, and the method of reliably providing the scraping member on the stirring blade is not sufficiently described in Patent Document 3. In particular, depending on how the scraping member is attached, adhesion of the cement composition to the stirring blade is caused, and the rotation resistance of the stirring blade is increased.

Moreover, in the mixer shown in the above-mentioned Patent Document 3, in order to reduce the resistance due to the cement composition during rotation with respect to the stirring blade, the stirring blade stands upright with respect to the bottom of the tank. Instead, they are arranged in an inclined state.
However, by inclining the rectangular stirring blade in this way, the rectangular corner of the stirring blade hits the inner peripheral surface of the tank exhibiting a circle in plan view. As a result, the scraping member is moved away from the inner peripheral surface of the tank and cannot be sufficiently scraped off.
Here, for example, as shown in FIG. 2 of the cited document 3, only the upper corner of the outer end of the rotation diameter of the stirring blade provided with the scraping member is brought closer to the inner peripheral surface of the tank. It is also possible to select the direction of the stirring blade, but by arranging in this way, the other part of the outer end of the rotating diameter of the stirring blade is moved away from the inner peripheral surface of the tank, and the cement on the outside of the stirring blade There is a concern that the composition cannot be sufficiently stirred.

The present invention, in agitation inclusive cement composition gravel and sand, the scraping member to eliminate the adhesion of the cement composition with the inner circumference of the tank for agitating the cement composition, with properly secured, the cement composition A specific means for reducing the resistance during the rotation of the stirring blades of the mixer of the object is provided to solve the above problem.

First aspect of the invention, a cement, and water, there is stirring the cement composition containing the gravel or sand, and the tank 1 containing the cement composition, and is disposed at the center of the tank 1 A rotating shaft 2 connected to a rotational power source and rotating, a stirring blade 3 provided on the rotating shaft 2, and an arm 4 connecting the stirring blade 3 to the rotating shaft 2 are provided. A bottomed cylindrical body having a side surface and one end surface as a bottom surface, and the stirring blade 3 is rotated along the inner peripheral surface of the tank 1 by the rotation of the rotating shaft 2 to stir the cement composition. The stirring blade 3 is provided with a scraping member 5 that protrudes upward from the upper portion of the stirring blade 3, and the partial scraping member 5 is stirred with the rotation of the rotary blade 3. It rotates integrally with the blade 3 and is attached to the inner peripheral surface of the tank 1 above the stirring blade 3. The cement composition, the mixer of the cement composition are those scraping, of providing what adopting the following configuration.
That is, the agitating blade 3 is a plate-like body having a bottom side facing the bottom of the tank 1 and a side side facing the inner peripheral surface of the tank 1. The scraping member 5 is a rod-like body, and includes a protruding portion 51 protruding upward from the stirring blade 3 and a fixing portion 52 fixed to the stirring blade. The fixing portion 52 of the scraping member 5 is fixed to the front surface of the stirring blade 3 or the outer end surface of the rotation diameter of the stirring blade 3 along the side of the stirring blade 3 with the rotation direction of the stirring blade 3 being forward. It has been done. The stirring blade 3 is inclined with respect to the bottom of the tank 1 so that the rotation direction is the front, and the lower side of the front surface of the stirring blade 3 is located in front of the upper side of the front surface. The angle formed between the base and the side is an acute angle.
In the first invention of the present application, the above-mentioned sides (sides, bases) include a straight line, a curved line, and a bent straight line (formed by a plurality of straight line parts). Including a combination of straight lines and curves.
In addition, the front surface of the stirring blade 3 or the outer end surface of the rotation diameter of the stirring blade literally refers to the front surface of the stirring blade 3 and the outer end surface of the rotation diameter of the stirring blade, and the front surface of the stirring blade 3 and the stirring blade. It also includes the space between the outer end face of the blade rotation diameter.

A second invention of the present application is the first invention of the present application, and provides a mixer of a cement composition having the following configuration.
The protruding portion 51 of the scraping member 5 that is a rod-like body is bent with respect to the fixed portion 52 provided along the one side of the stirring blade 3 in accordance with the inclination of the stirring blade 3. By being formed in this way, it extends vertically above the stirring blade 3. The scraping member 5 is a round bar, and the protruding portion 51 is provided with a buffer member 6, and the buffer member 6 is a round bar formed of rubber.

According to a third invention of the present application, in the second invention of the present application, an angle formed between the bottom side of the stirring blade 3 and one side side adjacent to the base side is 50 degrees or more and 70 degrees or less, and the scraping member 5 is provided with a cement composition mixer characterized in that a distance between the protruding portion 51 of 5 and the inner peripheral surface of the tank 1 is 15 mm or less.

By the present first to third invention, deposition in the mixer of a cement composition for stirring laden cement composition gravel and sand, by providing a scraping member, above the stirring blade in a bath of the mixer of the cement composition The scraped cement composition can be scraped off, and sticking of the cement composition to the position can be suppressed. The present invention particularly provides a specific means for securely attaching such a scraping member to the stirring blade.
Further, as the above-mentioned attachment means, the function of the scraping member is sufficiently secured, and the attachment of the scraping member is provided that makes it difficult for the cement composition to stay in the stirring blade itself.
That is, the scraping member is provided with a fixing portion fixed to the stirring blade, and further, with the rotation direction of the stirring blade being forward, the fixing portion of the scraping member is not the rear surface of the stirring blade but the stirring blade. Suppressing the cement composition from staying between the stirring blade and the fixed portion of the scraping member by fixing it to the front surface of the stirring blade or the outer end surface of the rotating diameter of the stirring blade along the side edge. did. For example, when a fixed part is provided on the rear surface of the stirring blade, a cement composition that stays between the rear surface and the fixed part forever is removed from the flow of the cement composition by stirring. the outer end surface, upon rotation of the stirring blades during agitation, is always the rotation of the stirring blade so that the hit the cement composition rake cement composition, pushed away to the cement composition hitting by the rotation, to the position The cement composition does not stay. Therefore, by fixing the fixed portion of the scraping member to the front surface of the stirring blade or the outer end surface portion of the rotating diameter, the cement composition in contact with the stirring blade does not stick, and the stirring performance of the stirring blade is reduced. And a large load is not applied to the rotating shaft (rotational power source).
Furthermore, by making the rotation direction forward and the stirring blade tilted with respect to the bottom of the tank so that the lower side of the front surface of the stirring blade is located forward of the upper side of the front surface, gravel and sand can be removed. The rotational resistance of the stirring blade was suppressed with respect to the contained cement composition.
Further, in this manner, both the upper end and the lower end of the outer end surface of the rotating diameter of the stirring plate are along the inner peripheral surface of the tank, and the upper end is formed by a circular shape on the inner peripheral surface of the tank. A gap can be secured between the lower end and the stirring blade, and when the stirring blade rotates, the cement composition can escape from the clearance to the rear of the rotating blade, and the resistance that the stirring blade receives from the cement composition. This can reduce the load on the mixer.
In particular, even when the stirring blade is tilted in this way, the stirring blade is formed into a plate-like body having one bottom side facing the bottom of the tank and one side adjacent to the bottom side facing the inner peripheral surface of the tank. By making the angle formed by the base and the side into an acute angle, the upper and lower ends of the side, that is, both the upper and lower ends of the outer end surface of the rotating diameter of the stirring plate are set on the inner peripheral surface of the tank. Can be along.

In particular, the present application in the second invention, the projecting portion of the scraping member is a rod-like body, to correspond to the inclination of the stirring blade, the fixed portion provided along said one side of the stirring blade By forming the bent portion in a bent state, the protruding portion can be vertically extended above the stirring blade so that each portion of the protruding portion can be evenly arranged on the inner peripheral surface of the tank. Adhesion of the cement composition to the inner peripheral surface of the tank can be reliably suppressed.

According to the third invention of the present application, the angle between the one side and the bottom of the stirring blade is more preferable than relaxing the resistance of the cement composition during rotation of the stirring blade, and the protrusion and the tank A more specific configuration is provided in which the distance from the inner peripheral surface is suitable for reliably scraping off the cement composition .

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 to 6 show a cement composition mixer according to an embodiment of the present invention.
FIG. 1 is a schematic longitudinal sectional view showing one embodiment of a cement composition mixer according to the present invention. FIG. 2 is a schematic plan view of the cement composition mixer. FIG. 3 is an enlarged cross-sectional view of the main part of the cement composition mixer shown in FIG. FIG. 4 (A) is a rear view of a stirring blade provided in the cement composition mixer, and FIG. 4 (B) is a side view thereof. 5A is an enlarged view of a main part of FIG. 4B, and FIG. 5B is a schematic cross-sectional view taken along line XX of FIG. 5A. FIG. 6 is an explanatory view showing the positional relationship between the mixer tank of the cement composition and the stirring blades. In each figure, hatching to be added is omitted in order to avoid complication of the drawings.
For convenience of explanation, in each figure, U indicates the upper side and S indicates the lower side.

The mixer of the cement composition according to the present invention stirs a cement composition containing cement, water, and gravel or sand. As shown in FIG. 1, the tank 1, the rotating shaft 2, and the stirrer are mixed . The blade 3, the arm 4, the scraping member 5, and the rotational power source m are provided.
Hereinafter, the configuration of each unit will be described in detail.

The tank 1 is a stirring tank for stirring the cement composition, and is a bottomed cylindrical body having a circumferential surface as a side surface and one end surface as a bottom surface.
The tank 1 includes a cylindrical portion 13 that extends upward from the center of the circular bottom surface 11. The tubular portion 13 is opened at the top, and the base side is fixed to the bottom surface 11 of the tank 1. Inside the tubular portion 13, the inside of the tubular portion 13 communicates with the outside of the tank 1. In each figure, 12 has shown the inner peripheral surface of the tank 1. FIG.
The rotating shaft 2 passes through the cylindrical portion 13 and is arranged so as to coincide with the central axis of the cylindrical tank 1. The upper end of the rotating shaft 2 is exposed to the inside of the tank 1 from the upper end of the tubular portion 13, and the lower end of the rotating shaft 2 is exposed to the outside of the tank 1 from the lower part of the tank 1. In this embodiment, the lower end of the rotating shaft 2 is connected to the rotational power source m. The rotational power source m employs a known device that supplies a rotational force directly or indirectly to the rotating shaft 2. Therefore, it is sufficient if it can generate such a rotational force, and an electric motor or an internal combustion engine can be employed.

The base end of the arm 4 is fixed to the rotating shaft 2, and the stirring blade 3 is provided on the distal end side of the arm 4. That is, the stirring blade 3 is supported by the arm 4 and attached to the rotating shaft 3 via the arm 4.
In this embodiment, a single arm 4 having a single stirring blade 3 is provided on the rotating shaft 2. However, the number of stirring blades 3 is not limited to one, and a plurality of stirring blades 3 can be provided. In that case, naturally, a plurality of arms 4 are also provided on the rotary shaft 2 in accordance with the number of stirring blades 3.

  As shown in FIGS. 1 to 3, the arm 4 is a metal rod-like body, and as shown in FIG. 4A, a plate-like body 40 for attaching the stirring blade 3 is provided at the tip thereof. Yes. As shown in the figure, the arm 4 is a bent rod-like body, and the tip side of the arm 4 is in a state where the shaft portion of the arm 4 is raised with respect to the plate-like body 40 (the axis of the arm 4 is the plate-like body 40). In a state intersecting with the plate surface). The plate-like body 40 is provided for bolting the stirring blade 3, and is provided with long holes 41 and 41 through which the bolts 42 and 42 are passed. The long holes 41, 41 are provided with an inner shape of an ellipse that penetrates the front and back of the plate-like body 40 and extends horizontally from side to side (the long axis is formed to be horizontal). In this embodiment, the length of the long axis of the long hole 41 is 40 mm.

As shown in FIGS. 3 and 4A, the stirring blade 3 is a metal plate formed in a trapezoidal shape having a base 31, an outer side 32, an inner side 33, and an upper side 34. (In the trapezoid, the base 31 and the upper side 34 are parallel, and the base 31 and the inner side 33 are substantially perpendicular).
The stirring blade 3 is attached to the tip (plate-like body 40) of the arm 4 by the above bolting, and the rotating shaft 2 is rotated by the rotational power source m, so that the inner peripheral surface of the tank 1 in the tank 1 The cement composition in the tank 1 is stirred.
The agitating blade 3 is attached to the arm 4 by providing a through-hole penetrating the agitating blade 3 from the front surface 30 to the back surface 35, bringing the plate-like body 40 into contact with the back surface 35 of the agitating blade, and a bolt 42. This is done by passing the through hole and the long holes 41, 41 and tightening the nut 43. By forming in this way, the attachment position of the stirring blade 3 can be finely adjusted along the long axis of the long holes 41 and 41. However, if such adjustment is unnecessary, it is possible to fix the stirring blade 3 to the plate-like body 40 by welding.

The angle θ formed by the bottom 31 of the trapezoid of the stirring blade 3 and the outer side 22 is an acute angle, particularly preferably 50 to 70 degrees, and most preferably 60 degrees.
The inner side 33 is located on the center of rotation of the stirring blade 3, that is, on the center side of the tank 1 with respect to the outer side 32. In other words, the outer side 32 is located outside the rotation diameter of the stirring blade 3 with respect to the inner side 33.
At the tip of the arm 4, the bottom 31 of the stirring blade 3 faces the bottom surface 11 of the tank 1 and the outer side 32 adjacent to the bottom 31 faces the inner peripheral surface 12 of the tank 1. The direction, that is, the direction of the plate-like body 40 is set. By attaching the stirring blade 3 to the plate-like body 40 as described above, the bottom 31 of the stirring blade 3 faces the bottom surface 11 of the tank 1 as described above, and the bottom 31 It can arrange | position so that the said outer side 32 adjacent to may face the inner peripheral surface 12 of the tank 1. FIG.

As shown in FIG. 4 (B), the stirring blade 3 is the front of the tank 1 so that the rotation direction of the stirring blade 3 is front F, and the lower side of the front surface 30 of the stirring blade 3 is located forward of the upper side of the front surface. Inclined with respect to the bottom (inclination angle φ). In this embodiment, the height of the inner peripheral surface of the tank 1 is 350 to 500 mm. The stirring blade 3 has a thickness of 4.5 to 6 mm. The length of the upper side 33 of the trapezoid presented by the stirring blade 3 is 150 mm. In this trapezoid, the width between the base 31 and the top 34 is 75 mm, but the height of the stirring blade 3 in the tank 1 is 50 mm due to the inclination described above. The inclination angle φ is set with respect to the bottom surface 11 of the tank 1 so that the stirring blade 3 has such a height (about 2/3 of the width between the upper side and the bottom side).
Even if such an inclination angle φ is set for the stirring blade 3, the lower end of the outer side 32 of the stirring blade 3 is set as shown in FIG. 6 by setting the angle θ formed by the base 31 and the outer side 22. Both upper ends p2 of p1 can be brought close to the inner peripheral surface 12 of the tank 1. However, a gap n can be secured between the lower end p1 and the upper end p2 with the inner peripheral surface 12 of the tank 1 that is circular in plan view with respect to the linear outer side 32, and the stirring blade 3 During rotation, a part of the cement composition hitting the front face 30 of the stirring blade 3 can be passed through the gap from the gap to the rear B of the agitator, thereby reducing resistance caused by the cement composition containing gravel. be able to.

The scraping member 5 is a rod-like body having a circular cross section as shown in FIGS. 4B and 5A, and a fixing portion 52 fixed to the stirring blade 3 and from above the stirring blade 3. And a protruding portion 51 that protrudes. The fixing portion 52 is provided on the front surface 30 of the stirring blade 3 along the outer side 32 of the stirring blade 3. The fixing portion 52 can be fixed to the stirring blade 3 by welding.
The protruding portion 51 of the scraping member 5 is formed in a bent state with respect to the fixed portion 52 corresponding to the inclination of the stirring blade 3, and thereby extends vertically above the stirring blade 3. +
As described above, the protrusion 51 extends vertically upward so that each part of the protrusion 51 has a constant interval w with respect to the inner peripheral surface 12 of the tank 1 (FIG. 3). The diameter of the scraping member 5 which is a rod-shaped body is 10 to 20 mm with respect to the tank 1 and the stirring blade 3 having the above dimensions. And said space | interval w is 15 mm or less, It is preferable to set it as 5-10 mm especially.
As described above, the protrusion 51 (scraping member 5) provided on the stirring blade 3 circulates in the tank 1 along the inner peripheral surface 12 of the tank 1 together with the stirring blade 3. Thereby, the part scraping member 5 scrapes off the mortar adhering to the inner peripheral surface of the tank 1 above the stirring blade 3.
At this time, the shock-absorbing member 6 made of a material having a cushioning property prevents the operator from accidentally contacting his / her hand or the like with the protruding portion 51 of the metal scraping member 5 to cause injury. Is preferably provided on the protrusion 51 (FIGS. 4A and 4B and FIG. 5A). The buffer member 6 can be made of rubber, urethane, or other soft plastic. The buffer member 6 is formed in a rod shape and has an outer diameter larger than that of the scraping member 5. For example, when the diameter of the scraping member 5 is 10 mm, the diameter of the buffer member 6 is preferably 20 mm.
The distance w may be determined in consideration of the contact between the buffer member 6 and the inner peripheral surface 12 of the tank 1. For example, when the diameters of the scraping member 5 and the buffer member 6 are set as described above, the scraping member 5 (protruding portion 51), the tank, and the buffer member 6 are in contact with the inner peripheral surface 12 of the tank 1. The interval w between the inner peripheral surface 12 and the inner peripheral surface 12 is 5 mm.

The height from the lower end of the stirring blade 3, that is, the trapezoidal base 31 exhibited by the stirring blade 3 to the upper end of the scraping member 5 (projecting portion 51) is 60% or less of the height inside the cement composition. Is preferable. In this case, the height of the buffer member 6 is not included (the buffer member 6 does not need to scrape off the cement composition ).

In said embodiment, even if the stirring blade 3 has shapes other than said trapezoid, it can be implemented. For example, the present invention can be implemented even when the base 31 and the inner side 33 are not right angles, pentagons, or other polygons. Furthermore, the outer side 32 and the base 31 need only be provided, and the shape of the other parts is not limited to the polygon, but can be implemented even if it is combined with a curve.
About the said stirring blade 3 and the tank 1, it is not limited to the dimension and angle which were mentioned above, It can change into another numerical value.
In the above embodiment, the rotational power source m is provided in the lower part of the tank 1. In addition, the tank 1 is provided with a lid body that closes the upper part, and the power source is provided in the lid body. It can also be implemented by providing the source m. Further, in this embodiment, as described above, although a mixer of the cement composition is intended to comprise a source of rotational power m, rotational power source is not provided in the mixer of a cement composition, the cement composition mixer It is also possible to use a separate rotational power source connected to the mixer when using the.

In the above embodiment, the scraping member 5 (fixed portion 52) is attached to the front surface 30 of the stirring blade 3 by welding (FIG. 5B). In addition, as shown in FIG. 7A, the scraping member 5 (fixed portion 52) can be attached to the outer end surface 36 of the rotating diameter of the stirring blade 3. Moreover, as shown to FIG. 7 (B), it can implement also as what attaches to the angle | corner which the front surface 30 of the stirring blade 3 and the said outer side end surface 36 make. Further, as shown in FIG. 7C, the outer end face 36 is inclined so as to look forward F, that is, from the front F to the rear B, the width in the rotational radial direction of the stirring blade 3 gradually increases. By forming the outer end face 36, the outer end face 36 is formed, and the scraping member 5 can be attached to the outer end face 36.
Thus, by providing the scraping member 5 (fixed portion 52) between the front face 30, the outer end face 36, or the front face 30 and the outer end face 36 of the stirring blade 3, the stirring blade 3 can Thus, the cement composition in the tank sequentially hits such a position, and the cement composition does not stay. For this reason, the cement composition does not adhere to such a position of the stirring blade 3 and harden. In any of the embodiments shown in FIG. 7, the scraping member 5 is attached along the outer side 32 of the stirring blade 3 as in the embodiment shown in FIGS. 1 to 6.
On the other hand, even if the scraping member 5 is disposed along the outer side 32 of the stirring blade 3, the back surface 35 of the stirring blade 3 deviates from the flow of the cement composition during stirring, and such a back surface 35. When the scraping member 5 is attached, the cement composition stays between the scraping member 5 (fixed portion 52) and the back surface 35 of the stirring blade 3 on the back surface 35 of the stirring blade 3, and the cement composition is transferred to the stirring blade 3 . Will stick, reducing the stirring performance and increasing the load on the mixer.
Therefore, it is preferable to attach the scraping member 5 to each position described above with respect to the stirring blade 3.
In addition, in each embodiment shown in FIG. 7, about the structure which was not mentioned especially, it is the same as that of the embodiment shown in FIGS.

It is a schematic longitudinal cross-sectional view which shows one Embodiment of the mixer of the cement composition which concerns on this invention. It is a schematic plan view of the mixer of the cement composition . It is a principal part expanded sectional view of the mixer of the cement composition shown in FIG. (A) is a rear view of the stirring blade with which the mixer of this cement composition is provided, (B) is the side view. (A) is a principal part enlarged view of FIG. 4 (B), (B) is XX schematic sectional drawing of (A). It is explanatory drawing which shows the positional relationship of the tank of a mixer of said cement composition, and a stirring blade. (A) is schematic sectional drawing which shows other embodiment of attachment of a scraping member, (B) is schematic sectional drawing which shows other embodiment of attachment of a scraping member, (C) FIG. 6 is a schematic cross-sectional view showing still another embodiment of attachment of the scraping member.

1 tank 2 rotating shaft 3 stirring blade 4 arm 5 scraping member

Claims (3)

Cement, and water, there is stirring the cement composition containing the gravel or sand, and tank housing the cement composition, to rotate and is connected to and rotates a power source is disposed at the center of the vessel The tank includes a rotating shaft, an agitating blade provided on the rotating shaft, and an arm that connects the agitating blade to the rotating shaft, and the tank has a bottomed cylindrical body having a circumferential surface as a side surface and one end surface as a bottom surface. The stirring blade is rotated along the inner peripheral surface of the tank by the rotation of the rotating shaft to stir the cement composition , and the stirring blade is disposed above the stirring blade from above. A cement member which is provided with a scraping member that protrudes toward the inner surface of the tank and rotates integrally with the stirring blade as the rotating blade rotates . a cement composition in which scraping In Kisa,
The stirring blade is a plate-like body having a bottom side facing the bottom of the tank and a side side facing the inner peripheral surface of the tank,
The scraping member is a rod-like body, and includes a protruding portion protruding upward from the stirring blade, and a fixing portion fixed to the stirring blade.
With the rotation direction of the stirring blade as the front, the fixed portion of the scraping member is fixed to the front surface of the stirring blade or the outer end surface of the rotation diameter of the stirring blade along the side of the stirring blade,
The stirring blade is inclined with respect to the bottom of the tank so that the rotation direction is the front, and the lower side of the front surface of the stirring blade is located forward of the upper side of the front surface.
A mixer of a cement composition , wherein an angle formed between a bottom side and a side side of a stirring blade is an acute angle . The protruding portion of the scraping member, which is a rod-shaped body, is formed in a bent state with respect to the fixed portion provided along the one side of the stirring blade, corresponding to the inclination of the stirring blade. By the above, it extends vertically above the stirring blade,
The scraping member is a round bar,
The protrusion is provided with a buffer member,
The mixer according to claim 1 , wherein the buffer member is a round bar formed of rubber . The angle formed by the bottom side of the stirring blade and the one side adjacent to the bottom side is 50 degrees or more and 70 degrees or less,
The mixer of a cement composition according to claim 1 or 2, wherein a distance between the protruding portion of the scraping member and the inner peripheral surface of the tank is 15 mm or less.

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