JPH1034643A - Tilting mixer for concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilting mixer for concrete which has a simple structure and can shorten kneading time. SOLUTION: A gear unit 19 for transmitting rotational power taken from outside to various parts is arranged in a mixer drum 8. A rotational shaft 21 is arranged on the gear unit 19 along the radial direction of the mixer drum 8 and stirring blades 24 are fixed on the rotational shaft 21 and a material is forcibly stirred not only by a kneading blade of the mixer drum 8 but also by the stirring blades 24 when it is kneaded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilting concrete mixer mounted on a ready-mixed concrete manufacturing plant for manufacturing ready-mixed concrete.

[0002]

2. Description of the Related Art A mixer installed in a ready-mixed concrete manufacturing plant or the like includes a gravity-type tilting concrete mixer that mixes materials to be kneaded by using gravity and a mixer that forcibly mixes and mixes kneaded materials. It can be classified as a concrete mixer with forced mixing.

[0003] The tilting-type concrete mixer combines a frusto-conical drum body, opens one end thereof,
A mixer drum having the other end closed is formed, and the mixer drum is rotatably mounted on the tilting mechanism, while kneading blades are mounted on the inner peripheral wall of the mixer drum.

[0004] When kneading ready-mixed concrete, first, the tilting drum mechanism is operated to turn the opening of the mixer drum upward, and the mixer drum is rotated in a certain direction by a motor, so that gravel, sand, and cement of concrete material are removed. And water. The operation of raising and then dropping the input materials by the kneading blades is repeated to perform the kneading operation. When kneading is completed, the tilting cylinder mechanism is operated again to tilt the mixer drum so that the opening of the mixer drum faces downward, and the ready-mixed concrete that has been kneaded is discharged.

[0005]

However, the above-mentioned conventional tilting-type concrete mixer has a simple structure, and requires only a small amount of power because of the kneading utilizing the gravity of the material, but the kneading time is forced. There is a problem that it takes longer than a mixed concrete mixer.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a tilting concrete mixer having a simple structure and a kneading time as short as possible.

[0007]

In order to achieve the above object, the present invention provides a tilted concrete mixer in which a mixer drum is rotatably mounted on a tilting mechanism to knead ready-mixed concrete. A gear unit for transmitting rotational power taken from the outside of the mixer drum to each unit is provided in the vicinity thereof, and a rotating shaft arranged in the radial direction of the mixer drum is rotatably connected to the gear unit. It is characterized in that stirring blades are arranged in the fins.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the tilted concrete mixer of the present invention, at the same time as the mixer drum rotates, a rotating shaft having stirring blades disposed inside the mixer drum rotates to forcibly agitate the material. Therefore, in addition to gravity-type kneading by rotation of the mixer drum, forced-type kneading can be performed, and kneading time can be shortened by increasing the efficiency of kneading.

[0009]

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

In the drawing, reference numeral 1 denotes a base of a tilting concrete mixer, and columns 2 are provided upright on both sides of the base 1.
A substantially U-shaped inclined frame 3 is provided at the tip of the column 2.
Is pivotally mounted on the tip of the cylinder 4, and the cylinder 4 is attached to the tilting frame 3 to allow the tilting frame 3 to swing by expansion and contraction of the piston rod 5 of the cylinder 4.

As shown in FIG. 4, a bearing 6 is disposed at the center of the tilting frame 3. A bearing 7 is loaded on the bearing 6, and a shaft 9 is fixed to the bottom of the mixer drum 8. The shaft 9 is axially mounted on the bearing 7 of the bearing 6, and the mixer drum 8 is rotatably attached to the tilting frame 3. A sprocket 10 for rotational driving is attached to the outer periphery of the bottom of the mixer drum 8. The sprocket 10 and the sprocket 12 of the driving motor 11 are connected by a chain 13 so that the mixer drum 8 is rotated by the driving motor 11. I have to.

Further, the shaft 9 is provided with a rotary power transmission shaft 14 for transmitting rotary power.
Has one end protruding outside the mixer drum 8 from the bearing 6, a sprocket 15 is attached to the end, and a sprocket 17 attached to a motor 16 is connected to the sprocket 17 by a chain 18 so as to be driven to rotate by the motor 16. I have. The other end of the rotary power transmission shaft 14 is inserted into a gear unit 19 disposed near the center of the mixer drum 8, and a bevel gear 20 for transmitting rotary power is attached to the distal end thereof.

Further, as shown in FIG. 5, a plurality of rotating shafts 21 are arranged in the gear unit 19 in the radial direction of the mixer drum 8, and one end of the rotating shaft 21 is inserted into the gear unit 19. Another bevel gear 22 meshed with the bevel gear 20 is attached to the tip of the lever. On the other hand, the other end of the rotating shaft 21 is rotatably mounted on a bearing 23 disposed on the peripheral wall of the mixer drum 8. Further, the stirring blades 24 are fixed to the rotation shafts 21, respectively, and the rotation of the rotation shaft 21 causes the stirring blades 24 to rotate.

A kneading blade 25 is attached to the inner peripheral wall of the mixer drum 8 so that the material is scraped up and dropped as the mixer drum 8 rotates.

When the ready-mixed concrete is kneaded by the inclined concrete mixer of the present invention, the drive motor 11 is driven so that the piston rod 5 of the cylinder 4 is contracted so that the opening of the mixer drum 8 is directed upward. Then, the mixer drum 8 is rotated, and the motor 16 is also driven to rotate the rotating shaft 21 in the mixer drum 8 so that the stirring blade 24 is also rotated.

Then, first, water, cement and sand are charged to produce a mortar. At this time, as shown in FIG. 6, the mortar is kneaded by the mixing drum 25 being scraped up by the kneading blades 25. However, when the stirring blade 24 comes to a lower position by the rotation of the mixer drum 8, the mortar being kneaded is further forcibly stirred. To perform the kneading more effectively.

When the mortar is manufactured, the gravel is charged, and kneading of the gravel and the mortar is started as ready-mixed concrete. Also at this time, the rotation of the stirring blades 24 stirs the gravel and the mortar at a position below the mixer drum 8 to mix the kneading blades 2.
In addition to the kneading according to No. 5, efficient kneading is performed.

When the kneading is completed, the ready-mixed concrete in the mixer drum 8 is discharged by extending the piston rod 5 of the cylinder 4 so that the opening of the mixer drum 8 faces downward.

As described above, in the present invention, a mechanism for forcibly stirring the kneaded material is added to the inclined concrete mixer in which the material to be kneaded is kneaded using gravity.
Efficient kneading can be performed and kneading time can be shortened.

[0020]

As described above, in the tilted concrete mixer according to the present invention, the gear unit for transmitting the rotational power taken from the outside of the mixer drum to the respective parts is disposed near the center inside the mixer drum. The gear unit is rotatably connected to a rotating shaft arranged in the radial direction of the mixer drum, and the stirring shaft is arranged on the rotating shaft, so that in addition to gravity-type kneading, forced-type kneading can be performed. The kneading time can be reduced with a simple structure.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a tilting concrete mixer according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a partially cutaway view of FIG.

FIG. 5 is a partially cutaway view of FIG.

FIG. 6 is an explanatory view showing a state during concrete kneading.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 ... Tilted frame 6 ... Bearing 8 ... Mixer drum 9 ... Shaft 14 ... Rotating power transmission shaft 19 ... Gear unit 20 ... Bevel gear 21 ... Rotating shaft 22 ... Bevel gear 24 ... Stirring blade

Claims (1)

[Claims] In a tilted concrete mixer in which a mixer drum is rotatably attached to a tilting mechanism to knead ready-mixed concrete, a gear for transmitting rotational power taken from outside of the mixer drum to each portion near a central portion inside the mixer drum. A tilting-type concrete, wherein a rotating shaft disposed in a radial direction of the mixer drum is rotatably connected to the gear unit, and stirring blades are disposed on the rotating shaft. Mixer.