JPH05329448A - Screen - Google Patents

Abstract

PURPOSE:To improve the work efficiency of a concrete testing by providing a traveling truck, a screening mechanism, a vibrating mechanism and receiving means, and by classifying and receiving the constituents of a concrete sample screened by the screening mechanism in the receiving means. CONSTITUTION:A screen 1 for screening a concrete sample to divide it into plural particle diameters is equipped with a traveling truck 2, a screening mechanism 7 provided on the traveling truck 2, a vibrating mechanism 8 for vibrating the screening mechanism 7, a sample receiver 9 for receiving the concrete sample screened by the screening mechanism 7. The sample receiver 9 has such a form that it classifies and receives the constituents of the concrete sample screened by the screening mechanism 7. As a result, the concrete sample is directly thrown in the screen 1 from a concrete plant and the thrown concrete sample is rapidly and automatically screened to divide it into a concrete product under test and waste concrete.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sieving apparatus for sieving a concrete sample to obtain a plurality of particle sizes, and more particularly to a sieving apparatus for producing a concrete test sample.

[0002]

2. Description of the Related Art Conventionally, in a concrete manufacturing plant or the like, a concrete sample is sampled from a hopper of a concrete plant, and the sample of the concrete sample is tested to perform product quality control. In the test, a sample sample is made by sieving the collected sample, and various operations are added to the sample sample.

[0003]

However, in the case of the concrete test as described above, the sieving for preparing the specimen sample is generally a manual sieving in which a net is stretched over a flat frame. I was dissatisfied with the work efficiency because the collected samples were sieved by a large number of people. That is, the sieving work by the human power is a repetition of the same operation many times, and moreover, it requires a lot of long working hours, which is a bitter experience for the worker. Further, the number of people required for the sieving work is usually 3 or 4 or more, and it has been difficult to secure manpower.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a sieving apparatus for automatically sieving concrete samples to improve the work efficiency of concrete tests.

[0005]

According to the first aspect of the present invention, there is provided a sieving device for sieving a concrete sample into a plurality of particle sizes, the traveling trolley and a sieving mechanism equipped on the traveling trolley. A vibrating mechanism for vibrating the sieving mechanism and a receiving means for receiving the sample sieved by the sieving mechanism are provided, and the receiving means is configured to separately receive the constituents of the concrete sample sieved by the sieving mechanism. A characteristic sieving device is used as a means for solving the above problems. In the invention according to claim 2, at least the sieving mechanism has moving means for moving in a direction perpendicular to the traveling direction with respect to the traveling carriage, and the sieving apparatus is provided with the sieving apparatus. And

[0006]

According to the sieving apparatus of claim 1, after moving the sieving mechanism to the concrete sample receivable position by traveling of the traveling trolley, the sieving mechanism receiving the concrete sample sifts the concrete sample. , And sift into several according to the particle size. Then, the receiving means separates and stores the concrete sample that has been sieved into a plurality of pieces. According to the sieving apparatus of the second aspect, the sieving mechanism is moved to the concrete sample receiving position by the traveling of the traveling carriage and the movement by the moving mechanism.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 1 is a sieving apparatus of the present embodiment, 2 is a traveling carriage that travels on a rail L laid close to a concrete plant P, 3 is a hopper stand assembled on the traveling carriage 2, and 4 is a hopper. A hopper fixed to the top of the gantry 3 for receiving concrete samples, 5
Is a traveling carriage that travels on the traveling carriage 2 on a moving rail 2a laid along the width direction of the traveling carriage 2, 6 is a spring, 7 is a sieving mechanism that is vibratably supported on the spring 6, and 8 Is a vibrating mechanism for vibrating the sieving mechanism 7, and 9 is a sample container (reception means) for separately storing the concrete samples sieved by the sieving mechanism 7.

As shown in FIGS. 1 to 3, a traveling carriage 2
Is configured to travel on the rail L by the driving force of the mounted drive motor 2b to position the upper opening 4a of the hopper 4 at a target position. The movable carriage 5 is constructed so as to be movable on the rail L by human power, and the lower portion 4b of the hopper 4 at the appropriate position of the sieving mechanism 7 is arranged.
Located below. The sieving mechanism 7 is formed by tensioning a net inside a rectangular frame in plan view, with its long side extending in the width direction of the traveling carriage 2 on the side opposite to the concrete plant P of the sieving apparatus 1. It is attached as a projecting form and is inclined with the projecting end side lowered.
The springs 6 are erected on the movable carriage 5 in a state where they are evenly arranged at four locations in a plan view. The two springs 6, 6 located on the concrete plant P side (right side in FIG. 1, front side in FIG. 2, bottom side in FIG. 3) are fixed on a pedestal 6a fixed to the moving carriage 5, and the sieving mechanism is used. 7 is a spring 6, 6 located on the side opposite to the concrete plant P.
It is designed to support at a higher position. The top of each spring 6 is fixed to a sieving mechanism 7 via a supporting jig 6b to support the sieving mechanism 7 so as to be vertically movable. As shown in FIG. 1, the sieving mechanism 7 has two parallelogram side plates 7a, 7a that are longer than the width of the hopper base 3 in the length direction.
Are arranged in parallel, and these side plates 7a and 7a are connected to the bottom plate 7b.
It is a general U-shaped body formed by connecting with the sieving device 1 with the opening portion facing upward and the end portion in the length direction protruding to the side opposite to the concrete plant P. ing. Further, the sieving mechanism 7 is installed so as to be inclined so that the side opposite to the concrete plant P is lower than the side on the concrete plant P side. A sample discharge port 7c is opened at an end of the sieving mechanism 7 on the opposite side of the lengthwise concrete plant P. A sample receiver 9 for accommodating the sample sieved by the sieving mechanism 7 is attached. A mesh 7d woven into a shape capable of sieving a concrete sample having a target particle size is attached along the upper edge of the side surface of the sieving mechanism 7 to the upper part of the inside of the sieving mechanism 7, and the opening of the sieving mechanism 7 is Covering. The mesh of the mesh 7d is concrete for the specimen (40 mm
The diameter is about 40 mm in consideration of sieving of the following) and waste concrete (40 mm or more). And
The sieving mechanism 7 has a large particle size according to the size of the mesh of the mesh 7d as the concrete sample received on the mesh 7d from the upper opening 4a descends on the mesh 7d. It is designed to be used for sieving with concrete for concrete. As shown in FIG. 2, the vibration mechanism 8 is a vibration that is attached to the spring 6, which is erected on the side of the concrete plant P side of the sieving apparatus 1, in the rear of the inner direction of travel of the springs 6 (left side in FIG. 2). The motor 8a, the vibration pulley 8b attached to the side plate 7a at the rear of the sieving device 1 of the sieving mechanism 7 in the traveling direction, and the rotational force of the vibration motor 8a attached between the vibration motor 8a and the vibration pulley 8b. And a belt 8c that transmits to 8b. Vibration pulley 8
The b has a bulge part in the winding portion of the vibrating pulley 8b, and the belt 8c is rotated by the rotational force of the vibrating motor 8a to generate a vibrating force to the sieving mechanism 7.

The sample receiver 9 is a hopper-shaped member formed of a steel plate, and is disposed above the sample receiver 9 and is provided with a waste receiving portion 9a for receiving the waste sorted by the sieving mechanism 7d. A sample receiving portion 9b is formed below the waste portion receiving portion 9a and receives the sample taken out from the concrete sample. A space between the waste receiving portion 9a and the sample receiving portion 9b is partitioned by an inner bottom plate 9c. The waste portion receiving portion 9a has an open upper portion and is located immediately below the sample discharge port 7c. In addition, the waste receiving unit 9a
A waste concrete discharge port 9d is opened at an end of the sieving device 1 on the front side in the traveling direction. As shown in FIG. 2, the sample receiving portion 9b has a lower bottom plate 9e that descends rearward in the advancing direction of the sieving apparatus 1 in a side view, and a sample obtained by sieving from the lower end of the rear portion is a sample receiver 9f. Is protruding. Then, the sample receiver 9 receives the discarded portion of the concrete sample, which is sieved by the sieving mechanism 7 and descends on the upper surface of the net 7d and is discharged from the sample outlet 7c, in the waste portion receiving portion 9a, and the bottom plate 7b. The sample receiving portion 9b receives the concrete for a sample to be lowered and discharged from the sample outlet 7c. The waste concrete stored in the waste portion receiving portion 9a is discharged from the waste concrete outlet 9d to the outside of the waste portion receiving portion 9a when the amount of deposition on the inner bottom plate 9c increases. Further, the waste concrete in the waste receiving portion 9a may be artificially discharged by a worker through the waste concrete discharge port 9d. The sample concrete received by the sample receiving portion 9b descends on the lower bottom plate 7e and is discharged from the sample receiver 9f. Waste concrete outlet 9d and sample receiver 9f
, Which is located several tens of centimeters above the ground, can directly receive waste concrete or concrete for test specimens by installing a unicycle or the like under them. Further, since the waste concrete discharge port 9d and the sample receiver 9f are opened in the opposite directions to each other in the traveling direction of the sieving apparatus 1, it is convenient to separately convey the waste concrete or the sample concrete.

The operation of this embodiment will be described below. Using the sieving apparatus 1 to screen concrete samples into waste concrete and concrete for test specimens,
First, the traveling carriage 2 is moved by the driving force of the drive motor 2b to position the upper opening 4a of the hopper 4 so that the sample supply position of the concrete plant P can be set. Then, the concrete sample is supplied from the concrete plant P into the hopper 4 in a state where the lower opening 4b is closed by the hopper opening / closing mechanism 4c. When the supply of the concrete sample is completed, the vibrating mechanism 8 is started to vibrate the sieving mechanism 7, and
The lower opening 4b is opened and the concrete sample is supplied to the sieving mechanism 7. When supplying the concrete sample to the sieving mechanism 7, the moving carriage 5 is moved in advance so that the uppermost portion of the net 7d (the end portion on the concrete plant P side) is located immediately below the lower opening 4b. The concrete sample supplied to the sieving mechanism 7 first falls to the end of the net 7d on the concrete plant P side, but the oscillating force of the sieving mechanism 7 causes the net 7d to descend in the direction opposite to the concrete plant P while Concrete for the specimen having a particle size smaller than the mesh of 7d is sieved down through the mesh 7d and is screened to the waste concrete which does not pass through the mesh 7d. Then, the screened concrete for discarding and the concrete for discarding are discharged from the sample discharge port 7c and fall into the sample receiver 9b or the waste receiver 9a, respectively, and pass through the sample receiver 9. And is discharged from the sample receiver 9f or the waste concrete discharge port 9d.

Therefore, according to the sieving apparatus of this embodiment, the sample concrete can be directly put into the hopper 4 from the concrete plant P, and the put sample concrete can be quickly and automatically put into the concrete to be tested and the waste concrete. Can be screened according to the purpose. Also,
The outlets of the screened concrete for concrete and the discarded concrete are separate from each other and the number of ground is 1
Since it is located at a height of 0 cm, it is convenient to install containers for storage and transportation, and it is automatic from the collection of sample concrete to be screened to the storage or transportation of screened concrete and discarded concrete. Can be done on a regular basis. As a result, a series of operations for sieving concrete samples can be done by one person in a short time, which enables labor saving and high quality control. In addition, in the sieving device 1, the sieving mechanism 7 is operated by the moving carriage 5 so that the sieving device 1
Since it is movable in the width direction, even if the sieving mechanism 7 having different plane areas etc. is used, the net 7d can be easily positioned at a position right under the lower opening 4b for receiving the concrete sample. be able to.

In the sieving apparatus 1, the meshes 7d are provided in a plurality of stages in the sieving mechanism 7, and the sample receivers 9 are provided in each mesh 7d.
Alternatively, the concrete sample may be sieved to a plurality of particle sizes by discharging the sample sieved through the individual outlets. The diameter of the mesh of the mesh 7d may be formed to have another size corresponding to the diameter of the object to be sieved.

[0013]

As described above, the traveling carriage, the sieving mechanism mounted on the traveling trolley, the vibrating mechanism for vibrating the sieving mechanism, and the receiving means for receiving the sample sieved by the sieving mechanism are provided. The feature is that the constituents of concrete samples that have been sieved by a sieving mechanism are received separately by the sieving mechanism.Therefore, sample concrete can be directly fed from the concrete plant to the equipment. In addition to being able to quickly and automatically screen into concrete for test specimens and waste concrete, it is convenient to install containers for storing and transporting the concrete for test specimens and waste concrete that have been sifted, and sample concrete to be sifted Sample concrete and waste contaminated by screening It can be carried out to the storage or transport of REITs automatically.

According to the second aspect of the present invention, at least the sieving mechanism is provided with a moving means for moving the trolley in a direction perpendicular to the traveling direction. Even if the mechanism is used, the sieving mechanism can be easily positioned in a suitable position for receiving the concrete sample.

[Brief description of drawings]

FIG. 1 is a front view showing a sieving device of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view of FIG.

[Explanation of symbols]

 1 sieving device 2 traveling dolly 5 moving dolly 7 sieving mechanism 8 vibrating mechanism 9 sample receiver

Claims (2)

[Claims] 1. A sieving apparatus for sieving a concrete sample into a plurality of particle sizes, the traveling trolley, a sieving mechanism equipped on the traveling trolley, a vibration mechanism for vibrating the sieving mechanism, and a sieving mechanism. A sieving apparatus comprising: a receiving means for receiving the sieved sample, wherein the receiving means is configured to separately receive the constituents of the concrete sample sieved by the sieving mechanism. 2. The sieving apparatus according to claim 1, wherein at least the sieving mechanism has moving means for moving in a direction perpendicular to the traveling direction with respect to the traveling carriage. Sieving device.