JP5443903B2 - Short fiber measuring device and short fiber supply method using the device - Google Patents

Description

  The present invention relates to a measuring device for measuring the weight of short fibers mixed in concrete and a method for supplying short fibers using this device.

  Conventionally, in order to increase the strength and rigidity of concrete or prevent explosion, a technique of mixing short fibers with concrete has been used.

  As an apparatus for manufacturing concrete containing short fibers, for example, Patent Document 1 discloses a supply unit for storing a large amount of steel fibers and supplying a predetermined amount of steel fibers, and this supply. There is disclosed a concrete kneading apparatus including a kneading unit for mixing steel fibers supplied from the unit and concrete. In the supply unit of the concrete kneading apparatus, the weight of the stored steel fiber is measured, and the decrease in weight before and after the supply is obtained as the supply amount of the steel fiber. For example, when the predetermined amount of steel fibers to be mixed with concrete is 50 kg and the current storage weight of the supply unit is 500 kg, the steel fibers are supplied to the kneading unit until the storage weight reaches 450 kg.

JP 2005-53102 A

  However, the concrete kneading apparatus described in Patent Document 1 has a problem that fibers are entangled and an error during supply increases, and a predetermined amount of steel fibers cannot be supplied with high accuracy.

  The present invention has been made in view of the above points, and provides a measuring device capable of accurately measuring and supplying short fibers such as steel fibers and a method for supplying short fibers using the device. With the goal.

In order to achieve the above object, the short fiber measuring device of the present invention is a container having a lower end opened for storing the short fibers supplied from a short fiber supply device for mixing concrete,
A movable door capable of opening and closing the lower end side opening of the container;
A measuring instrument for measuring the weight of the short fibers in the container ,
The container is characterized in that the inner dimension is the same from the upper end to the lower end, or the inner dimension increases from the upper end to the lower end .

  According to the present invention, since the measuring device for measuring the weight of the short fiber supplied from the supply device into the container is provided, the weight of the short fiber can be measured with high accuracy. Therefore, the short fibers in the container can be accurately adjusted to a desired amount.

Moreover, according to this invention, since the movable door which can open and close the lower end side opening part of a container is provided, all the short fibers measured correctly can be discharged | emitted from a lower end side opening part. And high quality concrete can be manufactured by mixing the discharged short fiber with concrete.
Furthermore, according to the present invention, the container has the same inner dimension from the upper end to the lower end, or the inner dimension increases from the upper end toward the lower end, so that the short fiber falls smoothly when the movable door is opened, For this reason, the short fibers are entangled with each other at the lower end side opening, which is a short fiber outlet, so that the lower end side opening is not blocked. Therefore, all the short fibers in the container can be efficiently discharged in a short time.

In the present invention, the movable door is
A door that is provided so as to cover the lower end side opening, and is rotatable about a hinge attached to the lower end of the container;
One end may be connected to the container, the other end connected to the door, and a drive device for rotating the door.

  According to the present invention, since the movable door is a simple mechanism, there are few failures. Moreover, it can be manufactured at low cost.

Further, the present invention is a container having a lower end for storing the short fibers supplied from a short fiber supply device for mixing concrete, a movable door capable of opening and closing the lower end side opening of the container, A measuring instrument for measuring the weight of the short fibers in the container ,
In the container, the short fiber supplying method using the measuring device having the same inner dimension from the upper end to the lower end, or the shape in which the inner dimension increases from the upper end to the lower end ,
Storing the short fibers supplied from the supply device in the container;
While measuring the weight of the short fibers in the container, adjust the amount of the short fibers so that the weight of the short fibers in the container is a predetermined value,
All the short fibers in the container are supplied to a concrete production facility.

  According to the present invention, the short fibers in the container can be accurately adjusted to a desired amount. A high quality concrete can be produced by discharging all the correct amount of short fibers and mixing with the concrete.

  ADVANTAGE OF THE INVENTION According to this invention, the measuring apparatus which can measure and supply a short fiber with sufficient precision, and the supply method of a short fiber using the same can be provided.

It is the schematic which shows the production equipment of the concrete containing the short fiber which concerns on this embodiment. It is a front view which shows the measuring device which concerns on this embodiment. It is a side view which shows the measuring device which concerns on this embodiment. It is a figure which shows the state which opened the door of the weighing | measuring device which concerns on this embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic view showing a production facility for concrete containing short fibers 1 according to the present embodiment.
As shown in FIG. 1, the short fibers 1 are first charged and stored in a large amount in the storage tank 4 of the continuous supply device 3. Next, a predetermined amount of short fibers 1 set in advance are supplied from the continuous supply device 3 to the weighing device 5. Then, while accurately measuring the weight of the short fiber 1 with the measuring device 5, the amount of the short fiber 1 is finely adjusted so as to be a predetermined value set in advance. Finally, the short fiber 1 adjusted to the predetermined value is supplied to the concrete kneader 6 to produce concrete containing the short fiber 1.

  The short fiber 1 has a length of about several mm to 60 mm and is made of a steel material or a plastic material. Examples of the short fiber 1 include steel fiber, polypropylene fiber, vinylon fiber, polyethylene fiber, aramid fiber, carbon fiber, and glass fiber.

  The continuous supply device 3 is a general device that stores a large amount of the short fibers 1 and continuously supplies a predetermined amount of the short fibers 1 to the measuring device 5 continuously. The method for measuring the supply amount of the short fiber 1 is the same as the method described in the background art. The weight of the short fiber 1 before and after supply is measured, and the amount of decrease is defined as the supply amount. At this time, since the continuous supply device 3 stores a large amount of short fibers 1, the measurement accuracy of the measuring device is, for example, about ± 1 kg and cannot be measured in units of grams.

2 and 3 are a front view and a side view of the weighing device 5 according to the present embodiment, respectively.
As shown in FIGS. 2 and 3, the metering device 5 can open and close the container 7 whose lower end is opened and the lower end opening 13 of the container 7 for storing the short fibers 1 supplied from the continuous supply device 3. A movable door 8 and a measuring instrument 9 for measuring the weight of the short fiber 1 supplied into the container 7.

The container 7 is, for example, a rectangular cylinder and has the same inner dimension from the upper end to the lower end. A plurality of support plates 10 are attached to the outer peripheral surface of the container 7 so as to protrude outward, and are attached to the gantry 11 via the support plates 10.
The short fibers 1 supplied from the continuous supply device 3 are put into the container 7 from the upper end opening 12 of the container 7.

  The movable door 8 is provided so as to cover the lower end opening 13 of the container 7, and a pair of bucket-like doors 15 that can be rotated about a hinge 14 attached to the lower part of the container 7 as a fulcrum, and one end to the container 7. The other end is connected to the door 15 and includes a driving device 16 for rotating each door 15.

  When the pair of doors 15 are closed together, the entire lower end opening 13 of the container 7 is covered, and the short fibers 1 can be stored in the container 7.

  When discharging the short fibers 1 in the container 7, the pair of closed doors 15 are rotated by the drive device 16 in the direction in which the doors 15 are separated from each other, whereby the lower end opening 13 in the container 7. Is opened, and the short fibers 1 can be discharged downward. In the present embodiment, a jack is used as the driving device 16, but the present invention is not limited to this, and other mechanisms may be used as long as the door 15 can be opened and closed.

  The measuring device 9 is installed between each support plate 10 and each mount 11. The measuring device 9 measures the total weight of the container 7, the movable door 8 and the short fiber 1, and subtracts the weight of the container 7 and the movable door 8 to obtain the weight of the short fiber 1. In the present embodiment, for example, a load cell that can be measured with an accuracy of ± 100 g is used as the measuring instrument 9.

  The weights of the container 7 and the movable door 8 are measured in advance, and a value obtained by subtracting these weights is displayed on the measuring instrument 9. That is, when the short fiber 1 is not contained in the container 7, the measuring instrument 9 displays 0 kg, and when the short fiber 1 is put into the container 7, the weight is directly displayed.

  And while measuring the weight of the short fiber 1 with the measuring device 9, the quantity of the short fiber 1 in the container 7 is adjusted so that the weight of the short fiber 1 in the container 7 may become a preset value. The adjustment method when using steel fibers as the short fibers 1 is, for example, when there are more steel fibers in the container 7 than the predetermined value, a magnet is put in the container 7 and the extra steel fibers in the magnet When the steel fiber in the container 7 is less than the predetermined value, the insufficient steel fiber is magnetized on the magnet and put into the container 7.

  In this way, by adjusting the weight of the short fiber 1 in the container 7, when the weight of the short fiber 1 reaches the predetermined value, the drive device 16 is driven as shown in FIG. Open and discharge all the short fibers 1 in the container 7 downward. At this time, since the container 7 has a shape whose inner dimension is constant from the upper end to the lower end, the short fibers 1 are not discharged in the container 7 and are all discharged in a short time. Under the container 7, a concrete kneader 6 is provided, and the short fibers 1 discharged from the container 7 are mixed with concrete.

  According to the measuring device 5 of the short fiber 1 in the present embodiment described above, the measuring device 9 for measuring the weight of the short fiber 1 supplied from the continuous supply device 3 is provided. Can be measured with high accuracy. Therefore, the short fiber 1 can be accurately adjusted to the predetermined value.

  Moreover, since the movable door 8 is provided, all the short fibers 1 measured accurately can be discharged. High quality concrete can be produced by mixing the discharged short fibers 1 with concrete.

  In addition, since the container 7 has the same inner dimensions from the upper end to the lower end, the short fibers 1 fall smoothly when the movable door 8 is opened. Therefore, the short fibers 1 are entangled in the lower end opening 13 to form a lump. The opening 13 is not blocked. Therefore, all the short fibers 1 in the container 7 can be efficiently discharged in a short time.

  Moreover, since the weighing device 5 is a simple mechanism, there are few failures. Moreover, it can be manufactured at low cost.

  In the present embodiment, a rectangular container 7 is used. However, the container 7 is not limited to this shape, and a circular container may be used.

  In the present embodiment, the container 7 has the same inner dimension from the upper end to the lower end, but is not limited thereto, and the inner dimension of the container 7 is from the upper end opening 12 to the lower end opening. A shape such as a pyramid shape or a cone shape that increases toward 13 may be used. According to this shape, the short fiber 1 falls smoothly when the movable door 8 is opened. For this reason, the short fibers 1 are entangled at the lower end opening 13 to form a lump, and the opening 13 is not blocked. Therefore, all the short fibers 1 in the container 7 can be efficiently discharged in a short time.

DESCRIPTION OF SYMBOLS 1 Short fiber 3 Continuous supply apparatus 4 Storage tank 5 Metering apparatus 6 Concrete kneading machine 7 Container 8 Movable door 9 Measuring instrument 10 Supporting plate 11 Stand 12 Upper end opening part 13 Lower end opening part 14 Hinge 15 Door 16 Driving device

Claims (3)

A container having a lower end opened for storing the short fibers supplied from a short fiber supply device for mixing concrete;
A movable door capable of opening and closing the lower end side opening of the container;
A measuring instrument for measuring the weight of the short fibers in the container ,
The short fiber weighing device , wherein the container has a shape having the same inner dimension from the upper end to the lower end, or a shape in which the inner dimension increases from the upper end to the lower end . The movable door is
A door that is provided so as to cover the lower end side opening, and is rotatable about a hinge attached to the lower end of the container;
The short fiber measuring device according to claim 1, further comprising: a drive device that has one end connected to the container and the other end connected to the door, and is configured to rotate the door. A container having a lower end opened for storing the short fibers supplied from a short fiber supply device for mixing concrete, a movable door capable of opening and closing the lower end opening of the container, and the short in the container A measuring device for measuring the weight of the fiber, and the container has a shape having the same inner dimension from the upper end to the lower end, or a shape in which the inner dimension increases from the upper end to the lower end. In the method for supplying short fibers using
Storing the short fibers supplied from the supply device in the container;
While measuring the weight of the short fibers in the container, adjust the amount of the short fibers so that the weight of the short fibers in the container is a predetermined value,
A method for supplying short fibers, wherein all the short fibers in the container are supplied to a concrete production facility.

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