JPH0694127B2 - Stirring blade body in concrete mortar mixer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a stirring blade body for a concrete mortar mixer capable of sufficiently stirring and kneading cement, sand and water, or an agitated object into which gravel or the like is added. Regarding

[0002]

2. Description of the Related Art Conventionally, in this type of concrete mortar mixer, various improvements have been made so that the aggregate and the like put into the drum of the mixer can be efficiently and sufficiently kneaded. For example, Jitsuko Sho 53-24
There is something like that described in Japanese Patent No. 907, which is
At least the lower half of which both ends are closed is provided with a rotary shaft which constantly rotates in a constant direction on a drum having an arcuate cross section, and the rotary shaft is twisted in the right direction to make its entire length shorter than the length of the drum, and In the drum, the stirring blade body whose angle passing through the center of the rotation axis at one end and the other end in the direction perpendicular to the rotation axis is within 180 degrees is moved closer to one end of the drum, and the stirring blade body and the drum. A space is provided between the rotary shaft and the other end of the drum, and the rotary shaft is twisted in the left direction so that its total length is shorter than the length of the drum. The stirring blade body whose angle passing through the center of the rotary shaft at the end is 180 degrees or less is brought close to the other end portion of the drum in the drum to form a space between the stirring blade body and one end portion of the drum. The rotating shaft of the stirring blade body provided and twisted in the right direction A fixed concrete mixer on the opposite side with respect to the center.

[0003]

However, in the above-mentioned means, the aggregate or the like having one end inside the drum is gradually transferred toward the center of the drum by the one stirring blade.
Aggregates and the like having the other end inside the drum are gradually transferred toward the center of the drum by the other stirring blade, and the aggregates and the like in the drum are traversed in a substantially 8-shape by both stirring blades. It moves while rotating, and the movement intersects in an X-shape and is kneaded and kneaded. Therefore, the kneading ability is improved compared to the previous one, but both agitating blades are fixed and the inside of the drum is fixed. There was a problem that aggregates and the like during kneading were entangled with the substantially central portion of the rotating shaft penetrating therethrough and remained in the form of lumps.

[0004]

Therefore, according to the present invention, the above-mentioned difficulties and the like are solved, and the stirring and kneading state of the aggregate and the like is further improved, and the aggregate and the like are entangled with the rotating shaft to form a lump. Does not remain, and moreover, the aggregate etc. can be efficiently and surely kneaded and kneaded in a short time, and the strength is relatively high,
The object of the invention is to provide a stirring blade body for a concrete mortar mixer which is excellent in durability and robust. Specifically, at least the lower half is a peripheral wall portion 16 having a substantially arcuate cross section. A drum of a concrete mortar mixer S that has a drum 15 provided with side wall portions 17 that close both ends of the peripheral wall portion 16 and that can mix cement, sand, water, gravel, and the like put into the drum 15 1
5 is an agitating blade body A that is installed in FIG. And drum 1
5, a pair of rotating shafts 1 arranged so as to slightly project into the drum 15 from both side wall portions, a pair of shaft mounting members 2 respectively fixed to the tip end portions of the rotating shaft 1, and the tip ends of the shaft mounting members 2. A pair of blade bases 3 fixed to the respective portions and sliding along the inner peripheral surface of the peripheral wall portion 16 of the drum 15, and a pair of blade base connecting members 4 connecting the central portions of the pair of blade bases 3 to each other. Is provided. Further, the pair of blade base connecting members 4 is configured by bending a substantially strip-shaped plate material,
A means for arranging the curved portion along the rotation direction of the stirring blade body A and arranging the curved portion at a position separated from the inner peripheral surface of the peripheral wall portion 16 of the drum 15 by a predetermined distance is adopted.

[0005]

Therefore, the pair of rotary shafts 1 are slightly projected into the drum 15 from both side wall portions of the drum 15,
A pair of shaft mounting members 2 are fixed to the tip portion thereof.
The pair of blade bases 3 are fixed to the tip end portions of the shaft mounting member 2, and the peripheral wall portion 1 of the drum 15 is rotated by the rotation of the rotary shaft 1.
6 Slide along the inner peripheral surface. A pair of blade base connecting members 4
Connects the central portions of the pair of blade bases 3 to each other, enhances the strength and rigidity of the entire stirring blade A, and is curved so as to be along the rotation direction of the stirring blade A to form the blade base connecting member 4 portion. In addition, the blade base connecting member 4 is arranged at a position separated from the inner peripheral surface of the peripheral wall portion 16 of the drum 15 by a predetermined distance to reduce the agitation resistance of the drum 15, cement, sand and water, or gravel, etc. It becomes difficult to come into contact with the agitated object. Moreover, the center of rotation of the agitation blade A becomes a space, and the cement and the object to be agitated such as sand, water, gravel, etc., introduced into the drum 15 move smoothly in the drum 15 during the agitation. Further, the stirring blade body A extends over the central portion of the drum 15, and the drum 1 of the object to be stirred is
5. The movement at the center of the inside of 5 can be done smoothly.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on illustrated examples.
In the figure, S denotes a peripheral wall portion 16 having a substantially arcuate cross section at least in the lower half thereof, and a side wall portion 17 for closing both end portions of the peripheral wall portion 16.
A concrete mortar mixer in which cement and sand, water, gravel or other agitated material is put into a drum 15 provided with and the agitating blade A provided inside the drum 15 can stir the agitated material Show.

The stirring blade body A installed in the drum 15 of the concrete mortar mixer S is arranged so as to slightly project from both side wall portions of the drum 15 into the drum 15 and both side wall portions of the drum 15. A pair of rotary shafts 1 that are rotatably mounted on 17, a pair of shaft mounting members 2 that are respectively fixed to the distal end portions of the rotary shaft 1, and a base end portion that is fixed to the distal end portions of the shaft mounting members 2. With drum 15
The peripheral wall portion 1 of the drum 15 so as to straddle the inner center portion
6 is provided with a pair of blade bases 3 arranged so as to slide along the inner peripheral surface, and a pair of blade base connecting members 4 for connecting the central portions of the pair of blade bases 3 to each other. In addition, the pair of blade base connecting members 4 are configured by bending a substantially strip-shaped plate material, and the curved portions are arranged along the rotation direction of the stirring blade body A, and the inner circumference of the peripheral wall portion 16 of the drum 15 is formed. It is arranged at a position separated from the surface by a predetermined distance.

Further, the pair of shaft mounting members 2 are arranged in the radial direction with respect to the rotation center of the stirring blade body A, and the pair of blade bases 3 are obliquely twisted with respect to the rotation direction of the stirring blade body A. It is arranged as follows. That is, the stirring blade body A
The central space portion (the central portion inside the drum 15) has a structure in which only the space portion exists, and the cement and the sand, water, gravel, and the like to be stirred into the drum 15 are drum 15
Care has been taken to ensure smooth movement during stirring in the inner central part.

Moreover, the tip end portions of the pair of blade base bodies 3 are arranged so as to be positioned substantially in the intermediate portion between the blade base body connecting member 4 and the shaft mounting member 2. That is, the distance between the tip of the blade base 3 and the side wall 17 of the drum 15 or the distance between the tip of the blade base 3 and the base of another blade base 3 is set to be relatively large. In order to smoothly move the cement and the agitated material such as sand, water, and gravel, which are put into the drum 15 in this portion, at the time of stirring.

By the way, the twist of the blade base body 3 is such that the base end portion and the tip end portion viewed from the side are in an open state (agitating blade body A).
Phase difference in the direction of rotation) is included within the range of about 40 to 60 degrees about the axis of rotation, and the cement and sand, water, gravel, etc. introduced into the drum 15 are It is designed to be stirred efficiently and uniformly.
In particular, the best stirring and kneading state can be obtained when the opening state of the blade base body 3 when viewed from the side of the base end portion and the tip end portion is about 45 degrees and the rotation speed of the stirring blade body A is about 25 to 50 RPM. Will be available.

Further, the blade base 3 is provided with a blade rubber mounting piece 5 which is directly fixed to the shaft mounting member 2 and the blade base connecting member 4.
The blade rubber mounting piece 5 is provided with a blade rubber 6 mounted via a pressing piece 7, and the blade rubber 6 is attached to the drum 15
It is configured so as to contact the inner peripheral surface of the peripheral wall portion 16. Reference numeral 8 in the drawing denotes a side wall blade rubber portion formed at the base end portion of the blade base 3 and configured to contact the inner surface of the side wall portion 17 of the drum 15.

As a means for driving and rotating the agitating blade A as described above, for example, the driving torque of the drive shaft of the prime mover 10 (or motor) is applied to one side through the sprocket 11 and the chain 12. It transmits to the rotating shaft 10 and transmits to the other rotating shaft 1 through the sprocket 11, the chain 12, and the rotation transmitting shaft 13 which is laterally installed behind the drum 15, or The stirring blade body A may be rotated by transmitting the driving torque of the prime mover 10 (or motor) to only one of the rotating shafts 1.

The drum 15 is composed of, for example, a peripheral wall portion 16 having a substantially U-shaped vertical cross section and both side wall portions 17 fixed so as to close both end portions thereof. In the lower part, a discharge port 18 for discharging the concrete mortar that has been stirred and kneaded is opened, and an opening / closing lid 19 that can open and close the discharge port 18 is attached. By the way, the configuration of the drum 15 is not limited to these, and may be a substantially cylindrical shape with both ends closed,
Other appropriate configurations can be adopted.

The specific configuration, shape, size and material of the stirring blade A, the specific configuration, shape, size and material of the rotary shaft 1,
Specific mounting means to the drum 15, specific configuration, shape, size and material of the shaft mounting member 2, specific fixing means to the rotary shaft 1, specific configuration, shape, size, material and blade base of the blade base 3. The specific configuration, shape, size, material, specific fixing means, fixing position, etc. of the connecting member 4 are not limited to those shown in the drawings, but can be set freely as appropriate.

[0015]

Therefore, the stirring blade body A of the present invention has the drum 15 provided with the peripheral wall portion 16 having a substantially arcuate cross section at least in the lower half thereof, and the side wall portions 17 closing both end portions of the peripheral wall portion 16. In the stirring blade body A installed in the drum 15 of the concrete mortar mixer S capable of stirring the cement, the sand, the water, the gravel, etc. charged in the drum 15, both side wall portions of the drum 15 A pair of rotating shafts 1 arranged so as to slightly project from the drum 15 into the drum 15, a pair of shaft mounting members 2 fixed to the tip portions of the rotating shaft 1, and fixed to the tip portions of the shaft mounting members 2, respectively. And drum 1
5 includes a pair of blade bases 3 that slide along the inner peripheral surface of the peripheral wall 16 and a pair of blade bases connecting members 4 that connect the central portions of the pair of blade bases 3 to each other. 4 is configured by bending a substantially strip-shaped plate material, the curved portion is arranged along the rotation direction of the stirring blade body A, and a position separated from the inner peripheral surface of the peripheral wall portion 16 of the drum 15 by a predetermined distance. Since the center of rotation of the stirring blade body A becomes a space, the cement and the object to be stirred such as sand, water, and gravel put in the drum 15 are
In addition, the cement and sand, water, gravel and the like can be moved more smoothly during stirring in the central portion of the drum 15 and the efficient and reliable stirring work can be performed. Further, the pair of blade base connecting members 4 connects the central portions of the pair of blade bases 3 to each other, and the stirring blade body A
The strength and rigidity of the whole can be increased, and the stirring blade body A with more excellent durability is obtained. Moreover, the stirring blade A
The stirring blade body A has a simple structure, strength and rigidity, and has sufficient durability.

In particular, the pair of blade base connecting members 4 are constructed by bending a substantially strip-shaped plate material, and the curved portions are arranged along the rotation direction of the stirring blade body A. The stirring resistance in the portion can be reduced, and moreover, since the blade base body connecting member 4 is arranged at a position separated from the inner peripheral surface of the peripheral wall portion 16 of the drum 15 by a predetermined distance, cement, sand, water, Alternatively, it becomes difficult for the blade base body connecting member 4 to come into contact with an object to be agitated in which gravel or the like has been put, and the object to be agitated is less likely to be entangled by the agitation blade A.
Further, the connection strength of the pair of blade bases 3 and the like can be considerably increased, and the stirring blade body A having more excellent durability can be configured.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a concrete mortar mixer.

FIG. 2 is a partially cutaway plan view of the concrete mortar mixer.

FIG. 3 is a partially cutaway side view of the concrete mortar mixer.

FIG. 4 is a vertical side view of a stirring blade body portion.

[Explanation of symbols]

S Concrete mortar mixer A Stirring blade body 1 Rotating shaft 2 Shaft mounting member 3 Blade base body 4 Blade base body connecting member 5 Blade rubber mounting piece 6 Blade rubber 7 Holding piece 8 Side wall blade rubber part 10 Motor 11 Sprocket 12 Chain 13 Rotation transmission Shaft 15 Drum 16 Peripheral wall 17 Side wall 18 Discharge port 19 Open / close lid

Claims (1)

[Claims] 1. A drum having at least a lower half of a peripheral wall portion having a substantially arcuate cross section and side wall portions closing both end portions of the peripheral wall portion, the cement and the sand charged in the drum, In a stirring blade body installed in a drum of a concrete mortar mixer capable of stirring water, gravel, etc., a pair of rotating shafts arranged so as to slightly project from both side wall parts of the drum into the drum, and a rotating shaft. And a pair of blade bases that are fixed to the front end of the shaft mounting member and that slide along the inner peripheral surface of the peripheral wall of the drum, and a pair of blade bases. And a pair of blade base connecting members that connect the central portions of the blade base connecting member to each other, and the pair of blade base connecting members are configured by bending a substantially strip-shaped plate member, and the curved portions are arranged along the rotation direction of the stirring blade body. And place it in An agitating blade body, which is arranged at a position separated from an inner peripheral surface of a peripheral wall portion of a ram by a predetermined distance.