JP3604273B2 - Aggregate sieving device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an aggregate sieving apparatus for removing nonstandard aggregates mixed in mortar / concrete containing steel fibers.
[0002]
[Prior art]
For example, when performing repairs that are eroded such as flooded slopes of dams, when working with the nozzle by hand, the thickness of the hose is limited to about 50 mm in diameter, and it was reinforced with the steel fiber used in that case The mortar / concrete containing steel fiber has a diameter of 0.6 mm and a length of about 25 to 30 mm.
[0003]
Here, when the mortar containing steel fibers is fed by a hose having an inner diameter of 50 mm, the aggregate of 15 mm or more in diameter must be removed before the 50 mm hose is clogged. In other words, when a mortar containing steel fibers is pumped by a hose having an inner diameter of 50 mm, aggregates having a diameter of 15 mm or more become nonstandard aggregates. When a mortar containing steel fibers mixed with non-standard aggregates is fed under pressure by a hose having an inner diameter of 50 mm, there is a great possibility that the hose will be clogged.
[0004]
Therefore, when supplying mortar from a ready-mixed concrete car to a pumping pump car, remove non-standard aggregates with a lattice sieve or install a vibration sieve (with a vibrator) on an edge frame such as a wire mesh net. Removal of unsuitable mixtures has conventionally been performed.
[0005]
Here, unless the size of the lattice sieve is at least 25 mm, fibers having a length of 25 to 30 mm will not pass. However, if the size of the lattice sieve is 25 mm or more, aggregates (non-standard aggregates) having a diameter of 15 to 25 mm, for example, gravel of around 25 mm, pass through the sieve. As a result, non-standard aggregates pass through the sieve and are mixed with the mortar / concrete containing steel fibers. As a result, a problem occurs in that the blockage in the hose frequently occurs during the spraying operation, causing a problem.
[0006]
On the other hand, in order to remove non-standard aggregates, a sieve of 25 mm or less is horizontally mounted on the hopper of the pump car, and the mortar is leveled by manpower (by two workers), and the steel fibers pass through. But it takes time and effort and is inefficient.
[0007]
[Problems to be solved by the invention]
The present invention has been proposed in view of the above-described problems of the related art, and allows steel fibers to pass through without requiring any manpower and reducing efficiency, and can remove nonstandard aggregates. The purpose is to provide such an aggregate sieving device.
[0008]
[Means for Solving the Problems]
The aggregate sieving apparatus of the present invention is an aggregate sieving apparatus for removing non-standard aggregates mixed in steel fiber-containing mortar / concrete, wherein a vibrating member composed of a longitudinal beam composed of a strip and a reinforcing bar is provided. Are fixed alternately in parallel at predetermined intervals in an edge frame of the sieve, and a vibration means for vibrating in a direction perpendicular to the longitudinal direction of the reinforcing bar is attached to the edge frame.
[0009]
According to the present invention having such a configuration, the vibration member vibrates by driving the vibration means, and the vibration member is set to have a sufficiently large amplitude near the center in the longitudinal direction. The distance between the vertical beam and the vibration member fluctuates, for example, in a range of about 12.4 to 18.4 mm due to the vibration. As a result, most of the aggregate within the standard (for example, within a diameter of 15 mm) passes between the vertical beam and the vibration member. On the other hand, non-standard aggregates cannot pass between the vertical beam and the vibration member.
[0010]
Then, the steel fibers are aligned in the mortar in the longitudinal direction of the vibration member by vibrating the vibration member. Then, it freely falls into the hopper from a long slit between the vertical beam and the vibration member (for example, a space having a width dimension of 12.4 to 18.4 mm).
[0011]
In this way, the mortar cement containing steel fibers passes through the aggregate sieving apparatus of the present invention to remove large non-standard aggregates, and the steel fibers are supplied to the hopper through the sieve and pumped by the pump. You. Then, since the non-standard aggregate is removed, no blockage in the hose occurs on the way to the nozzle. As a result, there is no need for manpower to prevent blockage or to deal with blockage.
[0012]
In the practice of the present invention, the edge frame of the sieve is preferably attached to the upper part of the hopper of a spray pump truck for pumping mortar concrete in such a manner that a reinforcing bar is inclined.
This is for facilitating the removal of non-standard aggregate that could not pass through the sieve.
[0013]
Further, it is preferable that the vibrator is constituted by a vibrator.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side sectional view showing an embodiment in which the aggregate sieving apparatus according to the present invention is mounted on a hopper of a pump truck. In FIG. 1, a vibrator plate 3 is attached to an aggregate sieving device 2 at an upper portion of a hopper 1 by bolts 11 through attachment holes 3a. Referring to FIG. 2, the vibrator plate 3 is provided with a vibrator 4 as a vibration means for vibrating a vibrating member 6 made of a reinforcing bar in a direction perpendicular to the reinforcing bar (in the left-right direction in the figure).
[0015]
The vibrator plate 3 is fixed to an edge frame 7a of a sieve indicated by reference numeral 2 (indicating the entire edge frame, use reference numeral 7). The edge frames 7c on both sides are inclined downward by 10 degrees with respect to the horizontal toward the edge frame 7b. This inclination angle α is preferably 5 to 25 degrees. If the inclination angle α is smaller than 5 degrees, the non-standard gravel is not removed and accumulates on the sieve. On the other hand, if the inclination angle α is larger than 25 degrees, the mortar flows out from the upper surface of the sieve, which is not preferable.
[0016]
Then, referring to FIG. 4 showing a BB cross section of FIG. 2, the edge frames 7a and 7b are connected by a plurality of vertical beams 5 made of a steel strip, and the edge frame 7b side is formed of a steel plate. The reinforcing member 9 is welded between the vertical beam 5 and the edge frame 7b.
[0017]
Referring to FIG. 3, a vibrating member 6 made of a reinforcing bar is disposed in the middle of the vertical beam 5 below the sieve 2 (on the hopper side), and both ends are fixed to edge frames 7a and 7b. In the illustrated example, the interval dimension W (core-core) of the vertical beam 5 is 40 mm, the diameter of the vibrating member 6 is 6 mm, and the thickness of the vertical beam is 3.2 mm. 0.8 mm, and the inner distance between the vibration member 6 and the vertical beam is 15.4 mm.
[0018]
In FIG. 1, reference numeral 20 denotes a stirring blade, 21 denotes a cylinder, 22 denotes a piston, 23 denotes an outlet pipe, 24 denotes a tapered pipe, 25 denotes a conveying pipe, M denotes mortar, and S denotes gravel.
[0019]
Further, the dimensions of the members are not limited to the above example, and may be set according to the situation of each construction site.
[0020]
Next, the operation will be described.
As shown in FIG. 5, when mortar / concrete M containing steel fiber is supplied from the ready-mixed concrete car N to the pumping pump car P, the aggregate sieving device 2 is inclined above the hopper 1 (10 degrees in the illustrated example). It is installed. When the vibrator 4 is driven, the vibration member 6 shown in FIG. 2 is vibrated in the left-right direction by the edge frame 7a, and the vibration member 6 is set to have an amplitude of 4 to 6 mm near the center in the longitudinal direction. I have.
[0021]
The distance between the vertical beam and the vibrating member fluctuates in a range of about 12.4 to 18.4 mm due to the excitation, and the amplitude of the vibrating member 6 becomes extremely small in a portion close to the edge frames 7a and 7b. Aggregates (within 15 mm) almost pass through, and non-standard aggregates hardly pass. Non-standard aggregates that cannot pass are removed as shown in FIGS. 1 and 5 because the sieve 2 is inclined.
[0022]
When the vibration member 6 vibrates, the steel fibers are aligned in the longitudinal direction of the vibration member 6 in the mortar, and fall freely into the hopper from the long slit of 12.4 to 18.4 mm.
[0023]
Note that the vertical beam 5 does not vibrate together with the vibration member 6 due to the resistance of the mortar if the height is about 30 to 40 mm.
[0024]
Therefore, the mortar / cement containing steel fiber passes through the aggregate sieving device to remove large non-standard aggregates, and the fiber passes through the sieve and is supplied to the hopper and is pumped by the pump. No blockage in the hose occurs and no manpower is required for it.
[0025]
【The invention's effect】
The present invention is configured as described above, the sieve is composed of a vertical beam and a vibrating member provided in parallel, formed at an interval where large non-standard aggregates can not pass, the sieve is attached with an inclination Since it is vibrated, non-standard aggregates are automatically selected. And, no special labor cost is required for the sieve. Therefore, it is efficient and can contribute to shortening of the construction period.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an aggregate sieving apparatus according to an embodiment of the present invention.
FIG. 2 is a plan view of an aggregate sieving apparatus.
FIG. 3 is a sectional view taken along line AA of FIG. 2;
FIG. 4 is a sectional view taken along line BB of FIG. 2;
FIG. 5 is a diagram illustrating an effect.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Hopper 2 ... Aggregate sieving device 3 ... Vibrator plate 4 ... Vibrator 5 ... Vertical beam 6 ... Vibration member 7 ... Edge frame 9 ... Reinforcement member M ..Mortar N ・ ・ ・ Concrete car P ・ ・ ・ Pump S ・ ・ ・ Gravel

Claims (3)

In an aggregate sieving device for removing non-standard aggregates mixed in mortar / concrete containing steel fiber, a vertical beam made of steel strip and a vibrating member made of rebar are parallel to the edge frame of the sieve. A vibrating means for vibrating in a direction perpendicular to the longitudinal direction of the reinforcing bar is attached to the edge frame. 2. The aggregate sieving apparatus according to claim 1, wherein the edge frame of the sieve is attached to an upper part of a hopper of a spray pump truck for pumping mortar and concrete so that a reinforcing bar is inclined. 3. The aggregate sieving apparatus according to claim 1, wherein said vibration means is a vibrator.

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