JPH0414164Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention consists of cement, water, admixtures, sand, gravel...
This is a particularly suitable proposal for a tilting concrete mixer used to knead and stir the kneaded materials of... to produce mortar or ready-mixed concrete.

[Conventional technology]

A conventionally known front charge type tilting mixer has several blades 8 fixed inside a drum 2, as shown in the perspective view of FIG. 5, and an electric motor that directs the drum 2 in a certain direction. Rotate it using a 4th grade tool. During operation, the drum 2 is tilted so that the opening 2b faces upward, and then the kneading material is put in, and the action of scooping it up with the blade 8 and allowing it to fall naturally is repeated as appropriate, thereby kneading and stirring the kneading material. will be held. When discharging the kneaded material 9 after the work is completed, the drum 2 is tilted so that the opening 2b faces downward, and the kneaded material 9 is taken out. In addition, as shown in FIG. 6, a conventionally known forced mixing mixer has a drum that is left stationary without rotation, and a rotating shaft with stirring blades attached therein.
The rotating shaft is forcibly rotated to knead and mix the kneaded materials.
This is for stirring. After the work is completed, the kneaded material 9 is taken out by opening a part of the bottom of the drum (see FIGS. 7 and 8). Both the former and latter mixers have large differences in their performance and structure, as well as differences in their manufacturing costs. Generally, the latter type of forced mixing mixer is more complex and expensive, but it is said to have high performance. Comparing on average with the same capacity, the latter's forced kneading uses about twice as much energy as the former's tilting type, while the time required for kneading and stirring is about 1.5 times faster. It recognized.

[Problem that the idea aims to solve]

In conventional forced mixing mixers, the tip of the stirring blade is installed inscribed in the drum, so as the years of use pass, the contact surface of the tip of the stirring blade and the inner wall of the drum wear out, making repair and maintenance difficult. Although there is a method of using wear-resistant special steel material for the necessary contact parts, there is a problem that the cost becomes even higher. On the other hand, if an air space is provided between the tip of the stirring blade and the inner wall of the drum in order to avoid this wear, the kneaded material will accumulate in that area without being kneaded or stirred, which is also undesirable in terms of quality control. In addition, considering that the conventional tilting mixer only performs kneading and stirring using the blades 8, it has the advantage of simplifying its structure and consuming less energy, but the time required for kneading and stirring is There was a problem that the work efficiency was insufficient, such as taking too much time.

[Means to solve the problem]

In order to solve the above problems, the measures taken by the present invention are as follows. One end is opened to form an opening, and the other end is closed to form a rear outer wall. A plurality of blades are fixed to the inside of the container, and the container is formed into a rotatable and tiltable structure to be attached to a base. A tilting type forced mixing concrete mixer, characterized in that the front charge type tilting mixer provided has the following structure. (a) The rear outer wall is provided with a plurality of rotatable shafts that penetrate the rear outer wall and protrude toward the inside of the container; (b) Each of the shafts (c) the respective shafts and the respective blades are arranged alternately along the direction in which the container rotates; and (d) The drive means for rotating each shaft and the drive means for rotating the container are structured to be driven by separate and independent drive sources.

[Effect]

The mixing tool attached to the shaft performs a rotational movement in which, in addition to the revolving movement of the blade, it also rotates on its own axis while making a similar revolution. The container is then tilted so that the opening faces upward before kneading and stirring.
The kneaded material moved by gravity from the opening side downward to the rear outer wall side is forcibly scooped up in the opposite direction upward through the blade. After being lifted up to a certain height, each blade separates from the blade and falls naturally with a different height.
The fallen kneaded materials are piled up along the inner wall of the container while being stacked one after another from the rear outer wall side toward the opening side. In addition, the effects of the revolution and rotation of the mixing tool act even during the falling of the kneaded materials, which causes the materials to be scattered in all directions before they are piled up, as well as the tip of the mixing tool and the inner wall of the container. Since the pressing action of the kneaded material also works between the two, the kneading and stirring effects are dramatically improved.

【Example】

FIG. 1 is a partially cutaway perspective view showing an embodiment of the mixer 1 according to the present invention, in which the drum 2 is stopped at an inclined position during elevation. Inside the drum 2, a plurality of three stirring blades 3 (six in this embodiment) are provided facing the inner wall 2a of the drum 2 and the blades 8 at a predetermined distance. Of course, the number of installed bases may be appropriately determined depending on the size of the drum 2, etc., and is not limited to this number. As shown in FIG. 1, the stirring blades 3 are formed by two shafts 5, 5, which are provided from the outside of the drum 2 to the inside of the drum 2, penetrating the rear outer wall.
It is fixed to and interlocked with the support shaft 6 through the support shaft 6. The two shafts 5, 5 may be fixed to the penetrating portion of the rear outer wall of the drum 2 using bearings, and may also be fixed to the tip of the drum 2, etc., if necessary (not shown). The two shafts 5, 5 are independent from the rotation of the drum 2 by a power motor 4a that is separate from the power motor 4 that rotates the drum 2.
It rotates and revolves in the same direction as the rotation direction of. In other words, when the blade 8 rotates in the direction of the arrow X in Fig. 2, the two shafts 5, 5 also revolve in the direction of rotation, while the shafts 5, 5 themselves also rotate in the direction of the arrow Xa, respectively. . Therefore, since the stirring blades 3 are fixed to the shafts 5, 5 via the support shafts 6, they also rotate while revolving around the axis. Since the stirring blades 3 revolve with the rotation of the drum, their presence does not hinder the rotation of the blades 8 fixed to the drum 2. The shafts 5, 5 are provided parallel to the rotational axis of the drum 2 while keeping a predetermined distance from the blade 8. However, in this embodiment, the rotational direction of the two shafts 5, 5, that is, the stirring blades 3, is the same as the rotational direction of the drum 2, but this rotational direction is not particularly limited. The stirring blades 3 are rotated in a direction opposite to the pointing direction, or the shafts 5, 5 are rotated in different directions so that the stirring blades 3 are rotated in mutually opposite directions. Good too. Further, the direction is not limited to the direction of the shafts 5, 5 parallel to the rotation axis of the drum 2, but may be an oblique direction along the inner wall of the drum 2, for example. The moving speed of the stirring blades 3 is preferably faster than the moving speed of the drum 2, but a speed change mechanism such as a gear is provided between the power motor 4a and the shafts 5, 5 in order to obtain the best kneading and stirring efficiency. It is preferable that the moving speed ratio is adjustable. In this embodiment, two shafts 5 and two blades 8 are provided, but the number may be determined as appropriate depending on the size of the mixer 1, etc. They may be arranged alternately along the direction of rotation. In particular, it is preferable that the shafts 5 are arranged concentrically and equally distributed. The materials constituting the stirring blades 3 and shaft 5 are as follows:
If it is strong enough to withstand long-term use, it is cast metal.
Any material such as an iron plate may be used, and there is no particular limitation. Furthermore, it is necessary that the stirring blade 3 and the two shafts 5, 5 are firmly fixed to each other by the support shaft 6. FIG. 2 is a partially enlarged perspective view of the stirring blade 3 according to the present embodiment, and in the embodiment shown in FIG. 2, the stirring blade 3 and the support shaft 6 are configured linearly. However, as in the embodiment shown in FIG. 3, the shape of the support shaft 6 is curved, the number of stirring blades 3 is changed, and the shape of the stirring blades 3 is formed into a box shape to make it easier to scoop up the kneaded material 9. Good too. As shown in the sectional view of FIG. 4, the tip of the stirring blade 3 faces the inner wall 2a of the drum with an air gap 7 about 1 cm wide between it and the inner wall 2a of the drum. The width of the sky = 7 is the kneaded material 9
The length of the support shaft 6 may be adjustable so that it can be appropriately determined depending on the quality and quantity of the support shaft. As described above, in the mixer 1 according to this embodiment, the air space 7 is provided at a predetermined distance between the tip of the stirring blade 3 and the drum inner wall 2a, so that the kneaded material 9 is filled in this air area 7. Even if it accumulates once, it falls and is removed by the simultaneous rotation of the drum 2, so there is no unevenness in kneading and stirring as a whole. In other words, as shown in FIGS. 1 and 4, two blades 8 are provided at positions that do not interfere with the rotation of the stirring blades 3, so that kneading and stirring can also be performed by the rotation of the drum 2. .

[Effect]

As described above, in the mixer 1 of this embodiment, the stirring blades 3 face the drum inner wall 2a and the blades 8 at a predetermined distance, and are configured to rotate while revolving around the drum 2 in addition to the rotation of the drum 2. . In other words, the kneading and stirring action in the mixer is synergistic in that the kneading and stirring action by the revolution of the blade 8 fixed to the inner wall of the drum 2 and the kneading and stirring action by the revolution and rotation of the stirring blade are performed simultaneously. That is, the kneaded material 9 in the drum 2 is first kneaded and stirred with the above-mentioned pressing action as the stirring blade 3 rotates, and as this kneading and stirring is repeated, it is transferred to the blade 8. It is scooped up and lifted to a certain height. The kneaded material 9 is further kneaded and stirred as it moves upward, and is then forced to fall by gravity to perform secondary kneading and stirring. Even during this falling, the kneaded material 9 is subjected to tertiary kneading and stirring by the rotating stirring blades 3.
Once it falls downward, primary kneading and stirring is immediately performed by another stirring blade 3, and the above-mentioned kneading and stirring are repeated as appropriate (see FIG. 9).
Therefore, it is possible to obtain an extremely long time for fine-grained kneading and stirring by the stirring blades 3, and also perform forced fall kneading and stirring by gravity at the same time. After the kneading and stirring work is completed, the drum 2 may be tilted and the kneaded material 9 may be taken out from the front opening 2b. Therefore, this embodiment can be said to have both the kneading mechanisms of the conventional forced kneading mixer and the conventional tilting mixer, and although it consumes much less energy than forced kneading, , the kneading/stirring ability is the same or more effective. In a specific experimental example of producing concrete, although motor 4 was 7.5Kw and motor 4a was 2.5Kw, the production capacity was almost the same as that of a 15Kw forced mixing concrete mixer. Ta. The tiltable forced mixing concrete mixer 1 equipped with the stirring blades 3 according to the present invention has the following features as in the above-mentioned embodiments.
It can be used not only for so-called concrete mixers but also for kneading and stirring all kinds of kneaded materials.

[Effect of the idea]

Therefore, since the mixer of the present invention requires only a small drive source according to the load on the shaft, it consumes less energy than conventional forced mixing mixers, and it also requires less energy than conventional tilting mixers. - It has good stirring performance and is extremely effective in producing a kneaded product of a quality comparable to that of conventional forced mixers.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing one embodiment of the mixer according to the present invention, Fig. 2 is a partially enlarged perspective view thereof, and Fig. 3 is a partially enlarged perspective view of another embodiment of the stirring blade. Figure 4 is a sectional view taken along line A-A in Figure 1;
Figure 5 is a perspective view of a conventional tilting mixer, Figure 6 is a perspective view of a conventional forced mixing mixer, Figures 7 and 8.
The figure is a sectional view of a conventional forced mixing mixer, and FIG. 9 is a sectional view showing the kneading and stirring action of the mixer of the present invention. Explanation of symbols, 1... Mixer, 2... Container (drum), 2a... Inner wall of container (drum), 3... Stirring blade (mixing tool), 6... Support shaft (mixing tool), 4, 4a
... Drive means (electric motor/drive source), 5... Shaft, 7... Sky, 8... Blade.

Claims (1)

[Claims for Utility Model Registration] (1) A container is provided with a plurality of blades fixed inside the container, one end of which is open to form an opening and the other end of which is closed to form a rear outer wall, and the container is rotatable; A tiltable forced mixing concrete mixer, characterized in that a front charge type tiltable mixer formed in a freely tiltable structure and installed on a base has the following structure. (a) The rear outer wall is provided with a plurality of rotatable shafts that penetrate the rear outer wall and protrude toward the inside of the container; (b) Each of the shafts (c) the respective shafts and the respective blades are arranged alternately along the direction in which the container rotates; and (d) The drive means for rotating each shaft and the drive means for rotating the container are structured to be driven by separate and independent drive sources. (2) The utility model registration claim 1 is characterized in that the axes of each of the shafts are parallel to the center line of rotation of the container, and are arranged concentrically and at equally distributed positions. The tiltable forced mixing concrete mixer according to item 1. (3) The utility model according to claims 1 and 2, characterized in that the shaft is configured to rotate in the same direction as the rotational direction of the container. Tiltable forced mixing concrete mixer.