JPS5946659B2 - Impeller for stirrer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an impeller for an agitator, in which the blade angle is oriented almost perpendicular to the rotation direction from the vicinity of the rotation axis to about 1/4 of the total length of the blade, and the tip part A stirrer blade that improves stirring efficiency by twisting the tip to an appropriate angle, and slightly twisting only the leading edge, making stirring work easier and without the need for extra force. It's about cars.

Traditionally, when mixing cement with sand and water, or when mixing various wall materials, etc., a concrete mixer was used when the amount was large, and a small bucket was used when the amount was small. Mixing was done by hand or using an electric motor-type handheld stirrer.

However, if we look at the conditions of the actual workplace, the entire workplace is small because there are a large amount of construction materials, etc., and when using a concrete mixer, just placing the concrete mixer takes up space, making the workplace even smaller. Also, in rainy conditions, it is impossible to mix cement, etc. outdoors, so the work must be done indoors, especially when mixed cement, etc. It is very convenient to do this indoors during construction,
Actually bringing the concrete mixer indoors
This method is very time-consuming and has the drawback of staining the inside of the building, so it is not practiced very often.

On the other hand, if mixing is done manually using a bucket or the like or with an electric motor-type hand-held stirrer, it is true that mixing can be done in any location.
Since the process was carried out using a bucket, etc., the capacity was small and the efficiency was very low.

Therefore, attempts are made to make the container larger, but if the container is made larger, manual mixing will take too much time, and mixing using an electric motor-type hand-held stirrer will require a relatively high speed of the stirrer. Even if it is rotated, the size of the impeller used for mixing cement etc. must be small or it will put a load on the motor, and in the end, if the container is made larger, the mixing work will not be done. That was the current situation. Therefore, the present invention was created in view of the above, and has been developed to improve stirring efficiency in a large container such as a half-cut drum so that sufficient stirring can be performed in a short time comparable to or even faster than that of a concrete mixer. This is an improved impeller for an agitator.The gist of the impeller is that a mounting screw is threaded on the inner circumferential surface of the rotating body so that it can be attached to a designated drive shaft. A suitable number of stirring blades made of quadrilateral steel plates or the like are erected radially with the short sides thereof at a slight angle of inclination with respect to the central axis of the rotating body. The twisting start point is approximately 1/4 of the total length of the blade from the installation part, and the twisting start point is 50 degrees in the direction of the inclination angle with respect to the central axis from the tip of the blade.
It consists in twisting it so that it becomes a fixed twist angle between 600 mm and 600 degrees, and further twisting only the leading edge a little to make it a rotationally stable part.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes an electric motor-type hand-held agitator, and an agitator impeller according to the present invention is attached to the tip of a drive shaft 2 of the hand-held agitator 1.

That is, this impeller for an agitator has a long nut-shaped rotating body 4 on its inner circumferential surface with a female mounting thread 3 that can be attached to the drive shaft 2. From the side, a fixing female screw 5 is threaded through the female screw 3 and is fixed with a bolt 6 to prevent the drive shaft 2 from coming off.

Therefore, it can be directly connected to the drive shaft 2 of the electric motor-type hand-held stirrer 1, and since it can be installed and removed freely, damaged or worn impellers can be replaced immediately. Incidentally, when screwing the rotating body 4 onto the drive shaft 2, if the female mounting thread 3 is threaded in the direction in which it is tightened when the drive shaft 2 is rotated, the bolt 6
The impeller will not come off the drive shaft 2 even if it is not fixed by VC, but it is safer if it is fixed by bolts 6, and
It is designed to be compatible with the blade attachment parts of various hand-held stirrers commercially available from various power tool manufacturers. The length of the short sides 7, 8 is 75 mm, the length of the long sides 9, 10 is 118 mm, and the short sides 7, 8 are arranged around the rotating body 4 from a line perpendicular to the long sides 9, 10. 9. A stirring blade 11 made of an inclined parallelogram steel plate with a plate thickness of 4.5 mm is attached at an inclination angle of 14 to the central axis of the rotating body 4.
2 are provided, and three pieces are radially arranged upright with one short side 7 (to be described later).

Moreover, as shown in FIG. 2, the stirring blade 11 is shaped like a parallelogram and extends from the upper corner 13 of one short side 7 (left side in the figure) to 231! Point 17 below Lm and the same upper corner F
657n7 horizontally from 3 to the upper long side 9! l point 18
Cut along the line that connects the
point 19 of Mll and the lower long side 1 from the same lower corner 14
Cut along the line connecting 25 points 20 horizontally to 0, and
Regarding the other short side 8 (right side in the figure), its upper corner 1
5 to 5m11 lower point 21 and a line connecting point 22 of 35m711 laterally from the same upper corner 15 to the upper long side 9, and 157n7 upward from the lower corner 16.
1! from the point 23 and the same lower corner 16 to the lower long side 10
Lateral direction 1fc10m7! It is cut along the line connecting the points 24 of 1 and formed into a substantially parallelogram shape, and when this impeller is attached to the drive shaft 2, the lower long side 10 is connected to the opposite side of the drive shaft 2. It is installed upright on the rotating body 4 so that

By erecting the stirring blades 11 of these shapes on the rotating body 4 in this way, when the stirring blades 11 are twisted as described later, the horizontal direction when the center axis of the rotating shaft 11 is vertically erected is The shape seen from above includes the stirring blade 11 and the upright portion 25.
The width bζ is narrow and gradually widens toward the tip, reaches its maximum width at the middle, and gradually narrows toward the tip 26, and is on the opposite side of the drive shaft 2. The sides are approximately horizontal, so when the impeller is rotated, the balance is good, and since the side opposite the drive shaft 2 is approximately horizontal, it can stir every corner of the stirring container. can do.

In addition, since a steel plate is used as the blade material, it is extremely strong in terms of wear and strength (Vc) compared to conventional materials such as aluminum or casting. It can be made thinner to about 4.5 TI 1 m and has better cutting quality. However, these stirring blades 1
1 is 30 m from the upright part 25, which is about 1/4 of the total length of the blade.
It is a plane that does not twist up to the position m, and this position of 30 degrees is defined as the twisting start part 27, and the inclination angle 1 of the upright part 25 with respect to the central axis of the rotary body 4 is set at the blade tip part 26.
The rotationally stable portion 28 is formed by twisting in the direction of 2 so as to form an angle of 600 in the range of 500 to 60, and further twisting only the leading edge by 40 degrees.

In other words, these torsional states and angles are
When the rotating body 4 is rotated by the drive shaft 2, due to the moment, the rotating circumferential speed is slower than the tip 26 and the rotational force is larger near the rotating body 4;
In terms of number 6, the rotational force is small and the rotational circumferential speed is large, so
Conventional impellers (FC units) were not able to increase the size of the impeller due to these obstacles, but these factors can be used in reverse to improve stirring efficiency. be.

First of all, the rotation axis 4 is near the rotating body 4 up to 30m11.
Since it only has a slight inclination angle 12 with respect to the central axis of the stirring blade 11, by rotating it, the stirring material is scattered and a near-vacuum space is created in front of the stirring direction of rotation of the stirring blade 11. Up to the position Lm, there is almost no resistance from the stirring material and it rotates very lightly.

Moreover, it also has the effect of sucking the stirring material kicked out diagonally upward in the direction of about 45 points on the outside by the tip 26 of the stirring blade 11, which will be described later. In addition to being able to evenly stir the stirring material, it also has the effect of relieving the force that pushes the stirring blade downward due to the reaction force from the kicked-out stirring material.
In addition, as a result of actual experiments, the best results were obtained when the inclination angle was set to about 14°. The tip part 26 of the stirring blade 11 has a twist angle of 600 degrees with respect to the central axis, and the material to be stirred is placed in the stirring container by the stirring blade 1.
The material is kicked out diagonally upward in the direction of approximately 45 volumes outside of the container 1, and the kicked out material is collided with the inner surface of the stirring container, making use of the stirring container. It bounces the liquid diagonally upwards to create a large stir.

Moreover, it is very well stirred by the suction force generated by the portion 30 mm away from the rotating body 4 mentioned above. In addition, since the position of the 30 dragons is set as the twisting start part 27 and the screw is twisted toward the top part 26, there is no stirring resistance for 30 mm up to the twisting start part 27, so the actual stirring resistance is the total blade length of 118 m1. However, the total length is 118mm minus 30mm, which is 90mm.
It experiences only the same resistance as rotating a blade of length. Moreover, by further twisting the leading edge of the stirring blade 11 at 4, the force of kicking the stirring material outward at the leading edge is weakened, and the force of the tip 26 kicking the stirring material outward is reduced. This prevents unstable movements such as wobbling caused by slight imbalance, and also makes it easier to move the rotating impeller to the left or right as desired. The dimensions of the stirring blade 11 described above are the dimensions obtained as a result of various experiments regarding resistance due to the kicking direction, twisting direction, etc. of the stirring material.

As explained above, the impeller for an agitator according to the present invention is an impeller that has been sufficiently studied in terms of stirring efficiency and rotational moment, and has a rotational resistance comparable to that of a conventional impeller. The diameter can be increased, and there is no force to pull the material toward the bottom of the stirring container, making it extremely easy to operate, shortening the stirring time, and actually stirring the same amount of material to be stirred. However, compared to a concrete mixer, the impeller for the mixer has extremely high stirring efficiency, as experimental results have shown that the stirring time is longer and the stirring is better than that of a concrete mixer.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view showing the installed state, FIG. 2 is a plan view of the stirring blade before twisting,
3 is a front view, FIG. 4 is a plan view, FIG. 5 is a cross-sectional view taken along the line A-A, and FIG. 6 is a cross-sectional view taken along the line B-B. 1... Hand-held stirrer, 2... Drive shaft, 3
...Mounting female thread, 4...Rotating body, 5.
...Fixing female screw, 6...Bolt, 7...
・Short side, 8...Short side, 9...Long side, 1
0... Long side, 11... Stirring blade, 12
...Incline angle, 13-16 ...Angle, 17
~24... point, 25... standing part, 26
...Tip part, 27...Twisting start part,
28...Rotation stability part.

Claims (1)

[Scope of Claims] 1. A rotating body with mounting screws cut into its inner circumferential surface so that it can be attached to a predetermined drive shaft, has an outer periphery made of a substantially parallelogram steel plate or the like with its short sides slightly inclined. Several stirring blades are erected radially with the short sides of the blades at a slight angle of inclination with respect to the central axis of the rotating body, and approximately 1/1/1 of the total length of the blades extends from the erected portion. Position 4 is the twist start point, and the tip of the blade is 50° to 60° in the direction of the inclination angle with respect to the central axis.
An impeller for an agitator, characterized in that the impeller is twisted so as to have a constant twist angle at an angle between .degree., and further, only the leading edge of the impeller is twisted slightly to form a rotationally stable part. 2. The impeller for an agitator according to claim 1, which has an inclination angle of 14 degrees, a twist angle at the tip of the blade of 60 degrees with respect to the central axis, and a leading end twisted by 4 degrees as a rotation stabilizing part. .