JPH058093Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a kneading device used for kneading cement, aggregate, and the like.

[Prior Art] In recent years, the number of Western-style detached houses has increased. The roofs of these Western-style houses are covered with flat slate tiles instead of the traditional Japanese tiles used in Japanese architecture.

Slate boards used for such slate tiles and OA floors are desired to be as light as possible, so they need to be thinner. However, making thin slate boards using only cement-based mortar had problems in terms of strength, such as being susceptible to cracking due to impact. Therefore, reinforcing fibers made of resin or the like are mixed into the cement to increase its strength and to strengthen the slate board.

Usually, mortar is made of cement, aggregate, etc.
It can be obtained by putting it in a kneading device and kneading it.

Kneading equipment generally weighs 200Kg around the rotating shaft.
The kneaded material is crushed and agitated by rotating a roller having the above-mentioned weight and sandwiching the kneaded material between the roller and the inner wall surface of the kneading device.

[Problem that the invention attempts to solve]

However, if a conventional kneading device is used to mix and disperse reinforcing fibers into the mortar, the viscosity of the mortar will change and the rollers will no longer rotate, causing the mortar to move forward of the rotation of the rolls. There was a problem that it accumulated and could not be stirred sufficiently.

In view of these circumstances, this invention aims to provide a kneading device that can efficiently form mortar in which reinforcing fibers are uniformly dispersed.

[Means to solve the problem]

This invention aims to achieve each of the above objectives.
A cylindrical stirring chamber with a bottom into which the kneaded material is placed, a drive shaft installed along the central axis of the stirring chamber and rotated by external power, and one side fixed to this drive shaft inside the stirring chamber and the other side rotating up and down. a support arm that is swingable in a direction; a rotation shaft is fixed on the other side of the support arm so as to be perpendicular to the drive shaft; and as the drive shaft rotates, the stirring chamber is rotated around the rotation shaft; A kneading device comprising a stirring roller that rolls along the bottom surface and crushes the kneaded material mixed between it and the bottom surface under its own weight, and a plurality of protrusions are parallel to the axis of the stirring roller. The ridgeline of the stirring roller is formed on the circumferential surface of the stirring roller so that it always crosses a part of at least two protrusions and does not intersect with each other, each extending from one peripheral edge of the stirring roller to the other peripheral edge. The gist is a kneading device that is characterized by:

[Effect]

With the above configuration, the contact area between the roller and the bottom surface of the stirring chamber becomes a part of the protrusion, and the surface pressure applied to the bottom surface is higher than in the past. Therefore, the rollers roll without stopping and stir the mortar and reinforcing fibers.

〔Example〕

This invention will be explained in detail below with reference to drawings showing examples thereof.

FIG. 1 shows a cross section of one embodiment of the kneading device according to the invention, viewed from above, and FIG. 2 shows the roller portion thereof viewed obliquely from above.

As shown in the figure, this kneading device is equipped with a stirring chamber 3. The stirring chamber 3 is provided with a raw material inlet (not shown) in the upper part, and a kneaded material outlet 33 in the bottom plate 32. The kneaded material outlet 33 is provided with a sliding door plate 34 that freely covers the outlet. Below the bottom plate 32,
Although not shown, an electric motor serving as a driving source is installed. The electric motor rotates a drive shaft 4 provided in the center of the stirring chamber 3 so as to penetrate the bottom plate 32. The base of the drive shaft 4 has a sealing structure (not shown) to prevent the contents of the stirring chamber 3 from leaking. The drive shaft 4 is provided with a stirring arm 41 in its radial direction. A stirring blade 5 is fixed to the tip of the stirring arm 41,
The stirring roller 6 is fixed to the center of the stirring arm 41 via a support arm 42 .

That is, one side of the support arm 42 is fixed to the drive shaft 4, and the other side is supported so as to be swingable in the vertical direction (direction toward and away from the bottom plate 32 of the stirring chamber 3) via the swing shaft 42a. . Then, the stirring roller 6
is fixed to the support arm 42 so that its rotating shaft 44 is perpendicular to the drive shaft 4.

A plurality of protrusions 61 are formed on the circumferential surface of the stirring roller 6. Each protrusion 61 is formed at a constant angle with respect to the periphery of the stirring roller 6, and is formed in an arc shape that opens toward the rotation direction of the stirring roller 6. Moreover, the ridge line 69 parallel to the axis of the stirring roller 6 always crosses at least two protrusions 61.

Therefore, the stirring roller 6 revolves as the drive shaft 4 rotates, and the support arm 42
The other side can swing vertically, so
Its lower end surface is always received by the bottom plate 32 and rolls due to friction with the bottom plate 32. Since the agitation roller 6 has a small contact area with the surface of the bottom plate 32 due to the protrusions 61, the surface pressure is greater than before, the frictional force increases, and the stirring roller 6 reliably rolls. By pushing the mortar into the gap between the strips 61 and the protruding strips 61, kneading can be performed reliably even when reinforcing fibers are introduced.

The size of the protrusion 61 is, for example, in the case of an 800φ stirring roller 6, with a height of 10 to 30 mm and a width of 15 mm.
It is preferable to set it to about 25 mm. Further, the angle of each protrusion 61 with respect to the peripheral edge of the stirring roller 6 is 30
~60° is preferable.

If the angle is less than 30°, the bottom plate 32 of the stirring chamber 3 will fit into the gap formed by the protrusions 61, and the stirring roller 6 will not rotate smoothly.

On the other hand, when the angle is larger than 60°, the contact area of the bottom plate 32 with the protrusion 61 decreases, and local wear of the bottom plate 32 tends to increase.

The angle of the stirring blade 5 can be changed freely, and by changing the angle, the stirring roller 6
It is now possible to reliably supply the kneaded material to the

This kneading device is configured to charge a predetermined amount of cement, sand, and reinforcing fiber chips into the stirring chamber 3 from the raw material input port, and stir and mix them together with an appropriate amount of water. As described above, stirring is performed by rotating the drive shaft 4 using an electric motor, thereby rotating the stirring blade 5, stirring roller 6, etc. via the stirring arm 41.

In the kneading device according to this invention, the protrusions 61 are formed on the stirring roller 6, so that the stirring roller 6 does not slip and roll depending on the viscosity or amount, unlike when the protrusions 61 are not provided. There is no such thing as not being properly kneaded and dispersed. That is, the protrusion 61 is
Since it acts to sufficiently penetrate into the kneaded material, sufficient kneading is performed.

The reinforcing fiber chips are not particularly limited, but for example, 50 to 800 single fibers such as vinylon can be used.
Examples include bundles with a diameter of about 0.1 to 1 mm.

The mortar containing reinforcing fibers stirred and mixed in this manner is formed into, for example, slate roof tiles or slate boards for OA floors.

The kneading device according to this invention is not limited to the above embodiment. In the above embodiment, there is one stirring roller, but a plurality of stirring rollers may be provided radially around the rotating shaft. In the above embodiment, the electric motor was installed at the bottom of the stirring chamber.
It may also be provided at the top.

[Effect of idea]

Since the kneading device according to this invention is configured as described above, the mortar and reinforcing fibers can be reliably crushed by the stirring roller, and the reinforcing fibers can be uniformly dispersed in the mortar.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a kneading device according to this invention, and FIG. 2 is a perspective view showing its stirring roller. 3... Stirring chamber, 4... Drive shaft, 6... Stirring roller, 32... Bottom plate, 42... Support arm, 44...
...Rotation axis, 61...Protrusion, 69...Ridge line.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A cylindrical stirring chamber with a bottom into which a kneaded material is placed, a drive shaft provided along the central axis of the stirring chamber and rotated by external power, and A support arm is fixed to the drive shaft on one side and is vertically swingable on the other side; A kneading device comprising a stirring roller that rolls along the bottom surface of a stirring chamber around a rotating shaft as it rotates, and crushes the kneaded material that is mixed between it and the bottom surface under its own weight, the kneading device having a plurality of The protrusions extend from one circumferential edge of the agitation roller to the other circumferential edge, respectively, so that the ridgeline of the stirring roller parallel to the axis of the agitation roller always crosses a part of at least two protrusions and does not intersect with each other. A kneading device characterized by being formed on the circumferential surface of an agitation roller so as to extend up to . (2) The kneading device according to claim 1, wherein the kneaded material is cement, sand, water, and reinforcing fiber chips with a diameter of 0.1 to 1 mm in which 500 to 800 reinforcing fibers are bundled.