JP2006289705A - Mortar mixer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly fix a scraping member excluding the adhesion of mortar to the inner surface of a tank for agitating the mortar containing gravel and sand and to reduce the resistance of an agitation blade of a mortar mixer during rotation. <P>SOLUTION: The mortar mixer comprises a bottomed cylindrical tank 1, a rotary shaft 2, and an agitation blade 3 attached to the rotary shaft 2. The agitation blade 3 is rotated along the inner surface of the tank 1 by the rotation of the rotary shaft 2. The scraping member 5 protruding upward is formed in the agitation blade 3. The agitation blade 3 is a plate-shaped body having a base facing the bottom of the tank 1 and a side arm facing inner surface of the tank 1. The scraping member 5 is a rod and has a protrusion 51 protruding upward from the agitation blade 3 and a fixed part 52 fixed to the agitation blade 3. The rotational direction of the agitation blade 3 is made forward. The fixed part 52 of the scraping member 5, along the side arm of the agitation blade 3, is fixed to the front of the agitation blade 3 or the outside end surface of the rotational diameter of the agitation blade 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mortar mixer that stirs mortar containing cement, water, and gravel or sand.

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

For mortar mixers that mix gravel and sand with cement and water, for example, as shown in Patent Document 1 and Patent Document 2, a tank for stirring mortar, a rotating shaft, a motor for rotating the rotating shaft, and a rotating shaft In general, an arm provided with an arm and a stirring blade provided at the tip of the arm. In such a mixer, a rotating shaft is rotated by a motor to rotate a stirring blade, thereby stirring the mortar 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 narrowed to be smaller than the lower part of the tank so that the mortar does not overflow from the tank by the above stirring.
However, the resistance against rotation of the stirring blades in the mortar for mixing gravel and sand is large, and in reality, the mixer of Patent Document 2 is not suitable for using mortar for mixing gravel and the like in this way. That is, in a mortar 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 suppressed to a height of half or less of the depth of the tank. is there.

  In the general mortar mixer used for stirring the mortar containing gravel shown in Patent Document 1, the stirring blade is located on the bottom side of the tank in the tank and is in a state of crawling the bottom of the tank by rotation. However, at this time, a part of the mortar rises along the inner peripheral surface of the tank due to the centrifugal force due to the 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 so as 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 mortar containing gravel is large, and the method itself for reliably providing the scraping member on the stirring blade is not sufficiently disclosed in Patent Document 3. In particular, depending on how the scraping member is attached, adhesion of the mortar 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 mortar during rotation with respect to the stirring blade, the stirring blade does not stand straight up with respect to the bottom of the tank. Are disposed 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 mortar outside the stirring blade There is a concern that the agitation may not be sufficiently performed.

  In the present invention, in stirring mortar containing gravel and sand, a scraping member that eliminates adhesion of mortar to the inner peripheral surface of the mortar stirring tank is appropriately fixed, and the stirring blade of the mortar mixer is rotated. A specific means for reducing the resistance is provided to solve the above problem.

The first invention of the present application is for agitating a mortar containing cement, water, gravel or sand, a tank 1 containing the mortar, and a rotational power source disposed at the center of the tank 1. The rotating shaft 2 connected to the rotating shaft 2, the stirring blade 3 provided on the rotating shaft 2, and the arm 4 that connects the stirring blade 3 to the rotating shaft 2 are provided. A bottomed cylindrical body having one end face as a bottom face, 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 mortar. 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 integrated with the stirring blade 3 as the rotary blade 3 rotates. Mortar that rotates and adheres to the inner peripheral surface of the tank 1 above the stirring blade 3 For mortar mixers in which scraping provide 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.
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.
Further, the front surface of the stirring blade 3 or the outer end surface of the rotation diameter of the stirring blade literally indicates 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 mortar mixer having the following configuration.
That is, the stirring blade 3 is a plate-like body formed in a trapezoidal shape. One base of the trapezoid presented by the stirring blade 3 faces the bottom of the tank 1, and one side adjacent to the bottom faces the inner peripheral surface of the tank 1. The angle formed by the base and the side of the trapezoid presented by the stirring blade 3 is an acute angle. 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 positioned in front of the upper side of the front surface. 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.

  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 The mortar mixer is 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.

In the mortar mixer that stirs mortar containing gravel and sand according to the first to third inventions of the present application, the mortar attached to the mortar mixer tank can be scraped off above the stirring blade by providing a scraping member. The sticking of the mortar to the position was suppressed. The present invention particularly provides a specific means for securely attaching such a scraping member to the stirring blade.
Further, as the above attachment means, the function of the scraping member is sufficiently ensured, and the attachment of the scraping member is provided so that it is difficult to cause the mortar 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. By fixing to the front surface of the stirring blade or the outer end surface of the rotation diameter of the stirring blade along the side, the mortar was restrained from staying between the stirring blade and the fixing portion of the scraping member. For example, when a fixed portion is provided on the rear surface of the stirring blade, a mortar staying between the rear surface and the fixed portion forever is generated after being removed from the flow of the mortar by stirring. In the rotation of the stirring blade during the stirring, the mortar is always scooped and hit by the rotation of the stirring blade, so that the mortar is not pushed away by the rotation and stays at the position. 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 mortar contacting the stirring blade does not stick, and the stirring performance of the stirring blade is not deteriorated. Also, a large load is not applied to the rotating shaft (rotational power source).

In particular, in the second invention of the present application, 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. Thus, the rotational resistance of the stirring blade was suppressed against mortar containing gravel and sand.
In particular, by tilting the stirring blade in this way, the stirring blade is trapezoidal in the shape of a trapezoid whose one side faces the bottom of the tank and one side adjacent to the bottom faces the inner peripheral surface of the tank. By making the angle between the base and the side into an acute angle, the upper and lower ends of the side of the trapezoid, that is, both the upper and lower ends of the outer end surface of the rotating diameter of the stirring plate, It can be along the inner peripheral surface of the tank. 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 mortar can escape from the clearance to the rear of the rotating blade, and the resistance that the stirring blade receives from the mortar is suppressed. The load on the mixer can be reduced.
Further, the protruding portion of the scraping member, which is a rod-like 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 extending the protrusion vertically above the stirring blade, each part of the protrusion can be evenly arranged on the inner peripheral surface of the tank above and below the stirring blade. Adhesion can be reliably suppressed.

  According to the third invention of the present application, the angle between the one side and the bottom side of the stirring blade is more preferable to reduce the resistance of the mortar during rotation of the stirring blade, and the protrusion and the inner periphery of the tank A more specific construction was provided in which the spacing between the surfaces was suitable for reliably scraping the mortar.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 to 6 show a mortar mixer according to an embodiment of the present invention.
FIG. 1 is a schematic longitudinal sectional view showing an embodiment of a mortar mixer according to the present invention. FIG. 2 is a schematic plan view of the mortar mixer. FIG. 3 is an enlarged cross-sectional view of a main part of the mortar mixer shown in FIG. FIG. 4A is a rear view of a stirring blade provided in the mortar mixer, and FIG. 4B 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 tank of the mortar mixer and the stirring blade. 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 mortar mixer according to the present invention stirs mortar containing cement, water, gravel, or sand. As shown in FIG. 1, the tank 1, the rotating shaft 2, the stirring blade 3, and the arm 4, a scraping member 5, and a rotational power source m.
Hereinafter, the configuration of each unit will be described in detail.

The tank 1 is a stirring tank that stirs mortar, 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). This 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 have an inner shape with 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 mortar in the tank 1 is agitated.
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, 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 At the time of rotation, a part of the mortar hitting the front face 30 of the stirring blade 3 can be passed through the gap from the gap to the rear B, and the resistance due to the mortar containing gravel can be reduced.

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 mortar. Is preferred. In this case, the height of the buffer member 6 is not included (the buffer member 6 does not need to scrape off the mortar).

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. In this embodiment, as described above, the mortar mixer includes the rotational power source m. However, the rotational power source is not included in the mortar mixer, and a separate rotational power source is used when the mortar mixer is used. It can also be implemented by connecting to a mixer.

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 Then, the mortar in the tank sequentially hits such a position, and the mortar does not stay. For this reason, mortar 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 arranged along the outer side 32 of the stirring blade 3, the back surface 35 of the stirring blade 3 is separated from the flow of mortar during stirring, and the back surface 35 is scraped. When the dropping member 5 is attached, the mortar stays on the back surface 35 of the stirring blade 3 between the scraping member 5 (fixed portion 52) and the back surface 35 of the stirring blade 3, and the mortar sticks to the stirring blade 3 and stirs. The performance is lowered and the load on the mixer is increased.
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 mortar mixer which concerns on this invention. It is a schematic plan view of the mortar mixer. It is a principal part expanded sectional view of the mortar mixer shown in FIG. (A) is a rear view of the stirring blade with which this mortar mixer is equipped, (B) is the side view. (A) is the 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 and stirring blade of said mortar mixer. (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.

Explanation of symbols

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

Claims (3)

Stirring mortar containing cement, water and gravel or sand, a tank containing mortar, a rotating shaft disposed at the center of the tank and connected to a rotational power source and rotating. A stirring blade provided on the rotating shaft and an arm that connects the stirring blade to the rotating shaft, and the tank is 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 mortar, and the stirring blade has a scraping member projecting upward from the upper portion of the stirring blade. The part scraping member rotates integrally with the stirring blade as the rotating blade rotates, and scrapes off the mortar attached to the inner peripheral surface of the tank above the stirring blade. In the mixer,
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 that protrudes upward from the stirring blade, and a fixing portion that is fixed to the stirring blade.
The fixing portion of the scraping member is fixed to the front surface of the stirring blade or the outer end surface of the rotating diameter of the stirring blade along the side of the stirring blade, with the rotation direction of the stirring blade as the front. A mortar mixer characterized by The stirring blade is a plate-like body formed in a trapezoidal shape,
The trapezoidal shape of the stirring blade has one base facing the bottom of the tank, and one side adjacent to the base faces the inner peripheral surface of the tank,
The angle between the base and the side of the trapezoid presented by the stirring blade is an acute angle,
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.
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. The mortar mixer according to claim 1, wherein the mortar mixer extends vertically above the stirring blade. 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 mortar mixer according to claim 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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