JP4424343B2 - Attachment for inspecting gap of high fluidity concrete - Google Patents

Description

  The present invention relates to an attachment for inspecting gap permeability of high-fluidity concrete.

  High-fluidity concrete is suitable for use in places where it is difficult to fill with normal concrete, such as structures with a thin cross-section, structures with a large amount of reinforcing bars, or structures with complex shapes. It is concrete and has fluidity that does not require compaction work after placing, and in a normal slump test, the slump cone is pulled out and spreads widely flatly, which is difficult to evaluate. It is a concrete that has high fluidity to a slump value.

  This high-fluidity concrete has a high fluidity compared to general concrete, but has an appropriate viscosity, so there is little separation of materials, and a homogeneous concrete can be easily obtained. Since it is excellent in workability and can be filled without requiring compaction, it has been applied to various concrete works in recent years.

In the above high fluidity concrete, quality control of the fresh properties is an important issue because the quality of the fresh concrete directly affects the quality of the structure.
As a method for managing this fresh property, for example, a method of measuring slump flow to determine its fluidity, or measuring funnel flow time such as a 0 funnel test or a V-type funnel test, and its separation resistance However, these test methods are only sample tests, and the quality of the high fluidity concrete to be cast is not constant. When the concrete contains defective concrete, it becomes difficult to perform appropriate quality control.

  On the other hand, as a test method that replaces the sample test, an all-pass test for inspecting the entire amount of high-fluidity concrete to be placed has been attempted, and one of the devices shown in FIG. 5 is installed between the pump car and the agitator car. Method is used. In this device, a large number of bars 2 such as reinforcing bars are lined up in the shape of combs for passing obstacles in a side opening 1a of a box-like container 1 whose upper part and one side are open, and through a chute of an agitator car. As shown by the arrow, the concrete supplied into the container 1 from the upper part passes between the comb-like bars 2 on the side and flows down to the receiving port on the pump car side. If the fluidity is poor, the quality of the fluidity is judged by utilizing the fact that it clogs at the bar 2 and stagnates in the container 1.

  However, the above apparatus has the following technical problems, and not only labor and cost are required for the inspection itself, but also the usability is poor. First, when the above apparatus is installed, it is necessary to increase the position of the agitator car because the position of the chute of the agitator car with respect to the receiving port of the pump car needs to be increased by the height of the device.

  Moreover, the concrete tends to stay inside the container 1, and it is necessary to remove it as necessary, which requires troublesome work.

  In addition, it is difficult to balance the amount of concrete in the pump truck's receiving port and the equipment, and it is troublesome to adjust the discharge from the agitator truck.

  The present invention solves the above-mentioned problems, and its object is to enable the mounting of the agitator vehicle to the chute so as to eliminate the inconvenience in the dedicated device so as to eliminate gaps in the high fluidity concrete. An inspection attachment is provided.

  To achieve the above object, the present invention provides a mounting plate that is detachably fixed to an upper surface of a concrete discharging chute in an agitator vehicle, and projects in a row in a row on the lower surface of the mounting plate. And a plurality of bars for passing obstacles orthogonal to the surface, and a high fluidity concrete gap penetration inspection attachment, wherein each of the bars is arranged in a plurality of rows along the passing direction of the high fluidity concrete. In addition, a partition plate for changing the cross-sectional area of passage is provided between the plurality of rows of bars, and the partition plate is swingably attached to the mounting plate via a shaft. The shaft is connected to an operation lever projecting to one surface side of the mounting plate via a link member on the surface side of the mounting plate.

  In such a configuration, just by attaching an attachment, it is possible to perform a gap passage inspection when the high-fluidity concrete flows down the chute without raising the agitator wheel, and to prevent the concrete from passing through. Further, when the inclination of the chute is constant, it is possible to conduct a test such as how much the partition plate is inclined to stop the flow.

  According to the present invention, it is possible to simultaneously perform the concrete supply operation and the full-pass inspection without raising the agitator car by simply attaching it to the concrete discharging chute of the agitator car, and it is easy when not required. Therefore, compared to the conventional inspection method using a dedicated device, there is no need for installation and height adjustment between the agitator vehicle and the pump vehicle, and there is no stagnation of the concrete and the usability is good.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a first embodiment of the present invention. In the figure, a chute 12 for discharging fresh concrete is provided at the rear portion of the agitator wheel 10 so that the chute 12 can turn and the inclination angle can be adjusted, and the attachment 14 of the present invention is detachably attached to the chute 12.

  The attachment 14 is mounted on the upper surface of the chute 12 in the width direction, that is, perpendicularly to the concrete flow direction, and is attached to both side surfaces of the mounting plate 16 via screws or the like. A side plate 18 that sandwiches the side surface and a lower portion of the mounting plate 16, which is arranged in a length arrangement corresponding to the semicircular arc cross section of the chute 12 at a predetermined interval, and is orthogonal to the passage surface of the chute 12. A plurality of bar members 20 for blocking passage are provided, and each bar member 20 is arranged in a zigzag manner in the length direction of the chute 12, for example, in a two-row arrangement.

  The both side plates 18 also serve as attachment portions of the mounting bands 22, both the bands 22 are wound around the lower half peripheral surface of the chute 12, and are fastened and fixed by a buckle 24 or the like provided at the connecting end, thereby fixing the attachment 3. Do.

  In addition, an inclinometer 28 is attached to one end in the longitudinal direction of the mounting plate 16 via a bracket 26. As shown in an enlarged view in a part of the figure, the chute is indicated by the indication point of the pointer 28a with respect to the zero point of the scale. Twelve inclination angles can be determined.

  In the above configuration, after the angle of the chute 12 is fixed by the inclinometer 28 so that the inclination angle of the chute 12 becomes a predetermined angle, the fresh concrete flowing down from the chute 12 by performing the concrete discharging operation is: The entire amount passes through the bar 20 of the attachment 14 and is supplied to the pump vehicle side (not shown). In this case, when the concrete stagnates at the position of the bar 20 due to the defective concrete, the discharge operation is immediately stopped to prevent the concrete from overflowing from the chute. These concretes can be easily removed by increasing the inclination angle of the chute 12.

  2 to 4 show other embodiments of the attachment 14. In the figure, the same parts as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted. Only the newly added parts are described by using new reference numerals. In the figure, a partition plate 30 is disposed between the front and rear bars 20. Each partition plate 30 is swingably attached to the mounting plate 16 via a shaft 30 a, and each shaft 30 a protrudes on one surface of the mounting plate 16 via a flat link 34 on the surface side of the mounting plate 16. The operation lever 32 is connected.

  Therefore, in this embodiment, while each partition plate 30 brings about the further passage-inhibiting effect, as shown to Fig.4 (a), the state which located each partition plate 30 in parallel with the flow direction, and (b) As shown, since the passage resistance is different from the case where the operating lever 32 is pulled and the partition plate 30 is inclined with respect to the flow direction, the extent to which the partition plate 30 is moved when the inclination of the chute 12 is constant. Tests such as whether the flow stops when tilted can also be performed.

  In the above embodiment, the partition plate 30 is movable, but a fixed plate can also be used. Further, although the inclinometer is omitted in the drawing, it is of course preferable to attach it.

It is explanatory drawing which shows the attachment for a test | inspection attached to the agitator vehicle to which this invention is applied, and this concrete discharge | emission sheet | seat. It is a front sectional view showing other embodiments of the attachment. It is a plane sectional view in the AA line of FIG. (A), (b) is plane explanatory drawing which shows the change of the passage cross-sectional area by a partition plate. It is explanatory drawing of the conventional all-pass inspection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Agitator wheel 12 Concrete discharge chute 14 Attachment for gap passage inspection 16 Mounting plate 20 Bar material 28 for passing obstruction Inclinometer 30 Partition plate

Claims (1)

A mounting plate detachably fixed to the upper surface of the concrete discharge chute in the agitator vehicle, and a plurality of passage obstacles projecting in a row on the lower surface of the mounting plate and orthogonal to the passage surface of the chute An attachment for inspection of gap permeability of high-fluidity concrete provided with a bar,
Each of the bars is arranged in a plurality of rows along the direction of passage of the high fluidity concrete and in a staggered manner,
A partition plate for changing the passage cross-sectional area is provided between the plurality of rows of bars,
This partition plate is swingably attached to the mounting plate via a shaft,
The high-fluidity concrete gap permeability inspection attachment characterized in that the shaft is connected to an operation lever projecting to one surface side of the mounting plate via a link member on the surface side of the mounting plate.

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