JP2003294729A - Measuring device for aggregate and water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device which can measure the mass of water and aggre gate with sufficient precision even if an aggregate immersion testing cannot measure all amount because the amount of the aggregate is too large. <P>SOLUTION: The measuring device for aggregate and water 1 is provided with a measuring tank 4 comprising a measuring tank body 2 and a pair of bottom lids 3a and 3b which are openable and closable while water-tightness of the tank is maintained, a load cell 5 for use as the first mass measuring means to measure the mass of the measuring tank, a water immersed aggregate storage space 6 located in the measuring tank 4 for use as a storage space for water immersed aggregate, and an ultrasonic sensor 7 for use as a volume measuring means to measure the volume of the water immersed aggregate stored in the water immersed aggregate storage space 6. The measuring tank 4 is stably hung with three load cells 5 from a stand 10 and the ultrasonic sensor 7 is also hung from the stand 10. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aggregate having different surface water states and an aggregate and water measuring device for measuring water.

[0002]

2. Description of the Related Art When mortar or concrete is mixed on site, the amount of water has a great effect on the strength of the mortar.
It is necessary to adequately control when mixing, but the water content of aggregates, especially fine aggregates, which are compounding materials, differs depending on the storage conditions and climatic conditions. Is increased by the amount of surface water of fine aggregate, and when dry fine aggregate is used, the amount of water in mortar is reduced by the effective amount of water absorption.

Therefore, it is extremely important to maintain the quality of the mortar by adjusting the amount of water at the time of kneading according to the degree of dryness and wetness of the aggregate and manufacturing the mortar and the like as indicated.

Here, the ratio of the amount of surface water in the wet state (the amount of water adhering to the surface of the aggregate) divided by the mass of the aggregate in the surface dry state (surface dry saturated state) is called the surface water ratio. Although it is called, since the stored aggregate is generally wet, the surface water ratio is measured in advance as an index of the dryness and wetness of the aggregate, and the mixing water amount is adjusted based on the measured value. Is common.

[0005] In order to measure the surface water ratio, a small amount of a sample is conventionally taken from a storage container called stock bottle in which aggregates are stored, and its mass and mass in an absolutely dry state are measured. Then, it calculated using these measured values and the water absorption rate of the surface dry state measured in advance.

[0006]

However, in such a measuring method, since the total surface water content is estimated only from a small number of samples, there is a limit in terms of accuracy, but in the absolutely dry state. It is unrealistic in terms of economy and time to sample a mass close to the amount actually used because it requires heating work with a heating furnace to measure the mass of is there.

In order to compensate for such a problem, a method may be adopted in which the operator visually confirms the mixing condition or adjusts the mixing water amount by referring to the load current of the mixer. However, such a method itself has a low precision, and in the end, it is unavoidable to expect a large safety factor of about 20% in terms of strength, which causes a problem of uneconomical mixing.

In order to solve such a problem, the present applicant has developed a weighing method using a water-immersed aggregate. According to such a water-immersed aggregate measuring method, each mass of water and surface-dried aggregate can be accurately determined in a state in which the surface water of the aggregate is reflected even if the surface water ratio of the aggregate is not known. it can.

However, in the sprayed mortar or the like used for slope construction, since the amount of aggregate is large, the aggregate cannot be soaked in water even if the filling rate is increased. There was a problem that the measurement law could not be adopted.

The present invention has been made in consideration of the above-mentioned circumstances, and is a case such as spray mortar which cannot be measured by the water-immersed aggregate measuring method due to a large amount of aggregate. Even if it is, it aims at providing the aggregate and water measuring device which can measure the mass of aggregate and water with sufficient accuracy.

[0011]

In order to achieve the above object, the aggregate and water measuring device according to the present invention has a measuring tank main body and its bottom opening which are watertight as described in claim 1. And a first mass measuring means for measuring the mass of aggregate and water put in the measuring tank, and a measuring tank formed in the measuring tank. Volume measuring means for measuring the volume of the water-immersed aggregate accommodated in the water-immersed aggregate accommodation space, a water tank for storing water supplied to the water-immersed aggregate accommodation space, and water in the water tank And a second mass measuring means for measuring the mass.

The aggregate and water metering device according to the present invention is capable of opening and closing the metering tank body and the bottom opening thereof while maintaining watertightness. A weighing tank including a bottom lid, a pedestal for suspending the weighing tank via the first mass measuring means, and a space for accommodating the water-immersed aggregate formed in the weighing tank and provided in the pedestal A volume measuring means for measuring the volume of the water-immersed aggregate stored in, a predetermined water tank support frame installed up and down on the frame, and for storing water supplied to the water-immersed aggregate storage space. And a water tank suspended near the top of the water tank support frame via a second mass measuring means.

Further, the aggregate and water measuring device according to the present invention is provided with a chain type lifting mechanism on the gantry,
The aquarium support frame is composed of a non-tiltable frame portion, a collapsible frame portion hinged to the top of the non-collapsible frame portion, and a collapsible operation lever connected to the collapsible frame portion. The frame part is fixed to the chain of the chain-type lifting mechanism in a vertical posture, and the water tank is suspended near the top of the inclinable frame part.

Further, in the aggregate and water measuring apparatus according to the present invention, the measuring tank main body is composed of a single box body, and the lower end of the measuring tank body is flush with the bottom opening of the box body. A predetermined partition is provided in the space, and the space that is divided by the partition and extends to one side is the water-immersed aggregate storage space.

Further, in the aggregate and water measuring device according to the present invention, the bottom lid is constituted by a pair of bottom lids so as to individually open and close the bottom openings of the two spaces partitioned by the partition body. Is.

Further, in the aggregate and water measuring device according to the present invention, the partition body is formed to have a predetermined thickness, and the bottom openings of the two spaces partitioned by the partition body are closed by the respective bottom lids. It is configured as follows.

Further, in the aggregate and water measuring apparatus according to the present invention, the measuring tank main body is connected to a predetermined box body and the box body so as to bifurcate downward from the box body. Two branch box bodies, one of the two branch box bodies is used as the water-immersed aggregate storage space, and the bottom lid is a pair of bottom lids. The bottom openings of the two branch box bodies are respectively closed.

Further, in the apparatus for measuring aggregate and water according to the present invention, the guide body formed of a flat plate is provided at the top opening of the measuring tank body so as to be rotatable around the horizontal axis in the measuring tank. A rotating mechanism for mounting and driving the guide body in the rotating direction is connected and installed to the guide body, and the rotating mechanism is put in a retracted position along the inner surface of the measuring tank body. The aggregate and the water are respectively held at an oblique guide position guided to the water-immersed aggregate storage space.

Further, in the aggregate and water measuring apparatus according to the present invention, a level is provided on the mount and a height-adjustable jack base is attached to the legs of the mount.

In the aggregate and water measuring apparatus according to the present invention, the water-immersed aggregate accommodating space is formed in the measuring tank. First, the water to be measured and a part of the aggregate are immersed in the water. The water-immersed aggregate is put into the aggregate containing space to measure the mass and volume of the water-immersed aggregate using the first mass measuring means and the volume measuring means, respectively. When adding water,
The water stored in the water tank is measured in advance by the second mass measuring means, and the surface water ratio of the aggregate is calculated using the measured value and the above-mentioned measured value.

Next, the remaining aggregate and, if necessary, insufficient water are additionally charged into the measuring tank, and the aggregate is weighed together with the water-immersed aggregate.

In this way, when producing, for example, mortar or concrete, the amount of aggregate, especially fine aggregate, is relatively larger than that of water due to, for example, a poor mixture, and the entire amount of fine aggregate is immersed in water. Even if it cannot be measured as fine aggregate, the surface water ratio calculated from the measured values is used to obtain sufficient accuracy for the remaining fine aggregate that could not be measured as water-immersed fine aggregate and its surface water. It becomes possible to measure with.

The procedure for measuring the aggregate and the water using the aggregate and water measuring device will be described more specifically. First, the water stored in the water tank is used as the water supply amount M _I , and the second mass measuring means is used. Measure in advance.

Next, while pouring the water in the water tank into the space for accommodating the water-immersed aggregate, among the aggregates such as coarse aggregate and fine aggregate to be measured, for example, a part of the fine aggregate is immersed in the water. It is put into the material storage space to make water-immersed aggregate.

When the aggregate and the water are poured into the space for accommodating the aggregate, whichever comes first is arbitrary, but if the aggregate is introduced after the water is introduced first, It becomes possible to considerably suppress the inclusion of air bubbles in the aggregate, particularly the water-infiltrated fine aggregate.

Next, the total mass M _f and the total volume V _{f of the} water-immersed aggregate.
Is measured by the first mass measuring means and the volume measuring means, respectively, to calculate the mass M _a of the aggregate in the surface dry state and the mass M _w of water in a state including the surface water of the aggregate as _follows. Solve to calculate. _{M a + M w = M f} (1) M a / ρ a + M w / ρ w = V f (2)

Here, ρ _a is the density of the aggregate in the surface dry state, and ρ _w is the density of water.

Next, the total mass M _f and the water supply amount M _I to the measuring tank measured in advance are substituted into the following equation, M _sw = M _f -M _I (3) _Calculate the mass M _aw of the material and _{calculate the} M
The _aw, the following equation, by substituting the _{(M aw -M a) / M} a (4), determine the surface water ratio of the aggregate.

Next, the remaining aggregate and, if necessary, the insufficient amount of water are additionally charged into the measuring tank, and the total mass including the water-immersed aggregate is measured by the first mass measuring means. The shortage of water is measured in advance by the second mass measuring means as described above.

Here, the increased mass is composed of the mass of the additionally added aggregate in the surface dry state, the surface water of the aggregate and the additionally added shortage of water, and the surface water ratio and shortage of the aggregate are added. The water mass has already been calculated or measured.

Therefore, the increased mass can be divided into the mass of the aggregate in the surface dry state and the mass of water including the surface water of the aggregate, and as a result, the total aggregate and the aggregate put in the measuring tank are It is possible to calculate the mass of water in a state where the surface water of the aggregate is accurately reflected.

When the aggregate and the water are accurately measured in the measuring tank in this way, the bottom lid of the measuring tank is opened and dropped downward,
Using these, for example, spray mortar and fresh concrete are appropriately produced.

When the water-immersed aggregate or the aggregate cannot be completely free-falled due to the adhesion of the aggregate to the inner surface of the measuring tank or the compaction of the aggregate, a vibration imparting device such as a vibrator or a knocker. May be appropriately attached to the side of the measuring tank.

Each of the first mass measuring means and the second mass measuring means can be composed of, for example, a load cell. The second mass measuring means includes not only the case of directly measuring the mass of water but also the case of indirectly measuring the mass of water by once measuring the volume of water and converting it into the mass. However, such volume measurement can be performed by, for example, an ultrasonic sensor or an electrode type liquid surface displacement sensor.

The volume measuring means may be composed of any means as long as it can measure the water-immersed aggregate in the measuring tank. For example, an ultrasonic sensor, an electrode type liquid level displacement sensor,
It may be configured with a float meter or the like.

The measuring tank, the first mass measuring means, the volume measuring means, the water tank and the second mass measuring means may be arranged in any manner. For example, the measuring tank may be mounted on a pedestal via the first mass measuring means. While it may be hung, the volume measuring means may be provided in the measuring tank or the gantry. Further, a predetermined water tank supporting frame is movably installed on the above-mentioned gantry, and the above-mentioned structure is provided near the top of the water tank supporting frame. A configuration is conceivable in which the water tank is suspended via the second mass measuring means.

In such a construction, during transportation, the water tank support frame is lowered to lower the installation position of the water tank, and when used, the water tank support frame is raised to raise the installation position of the water tank.

With this arrangement, the total height of the weighing device according to the present invention can be kept low during transportation, the water tank suspended from the water tank supporting frame can be prevented from shaking, and the second mass measuring means While it is possible to prevent damage, the water in the water tank can be smoothly and naturally flowed into the measuring tank during use.

Here, the frame is provided with a chain-type lifting mechanism, and the aquarium support frame is hinged to the non-foldable frame portion and the top of the non-foldable frame portion, and the tiltable frame portion. A non-foldable frame part is fixed to the chain of the chain-type lifting mechanism in a vertical posture, and the water tank is suspended near the top of the tiltable frame part. In such a case, first, the chain-type lifting mechanism is drive-controlled to raise the water tank support frame fixed to the chain to the ascending position in the vertical posture.

Next, by operating the pulling operation lever so as to pull it toward the front at the raised position, the folding frame portion of the water tank supporting frame is, for example, 20 ° with respect to the top of the non-folding frame portion. Rotate in the range of ~ 30 °.

In this way, the water tank suspended on the top of the inclinable frame section moves horizontally from the side position of the gantry to the upper side of the gantry while maintaining the horizontal posture. Therefore, it becomes possible to more smoothly add water to the measuring tank installed on the pedestal.

As long as the water-immersed aggregate accommodating space for accommodating the water-immersed aggregate is formed, the metering tank main body may have any structure, and the bottom lid may be the bottom of the metering tank main body. Any configuration may be used as long as the opening can be opened and closed while maintaining watertightness.

For example, the main body of the measuring tank is composed of a single box body, and a predetermined partition body is provided in the box body so that the lower end is flush with the bottom opening of the box body, and the partition body is used for partitioning. It is conceivable that the space that expands to one side is used as the water-immersed aggregate storage space.

In this case, the bottom cover may be configured to open and close the entire bottom opening of the box body, but the bottom opening of the two spaces partitioned by the partition body may be opened and closed individually. When the lid is composed of a pair of bottom lids,
It requires less space in the height direction to open and close the bottom lid.

Further, it is conceivable that the partition body is formed to have a predetermined thickness, and the bottom openings of the two spaces partitioned by the partition body are closed by the bottom lids.

According to this structure, it is sufficient to ensure the watertightness of each bottom lid and the bottom opening closed by the bottom lid, so that the bottom lids are manufactured as compared with the case where the watertightness of the bottom lids is secured. The accuracy is eased and the manufacturing cost can be reduced.

Further, the measuring tank main body is constituted by a predetermined box body and two branch box bodies which are connected to the box body so as to bifurcate downward from the box body. Of the branch box bodies, one inner space is used as the water-immersed aggregate accommodation space, the bottom lids are a pair of bottom lids, and each bottom lid closes each bottom opening of the two branch box bodies. It is conceivable to configure the above.

According to this structure, it is sufficient to secure the watertightness of each bottom lid and the bottom opening closed by the bottom lid, so that the bottom lids are manufactured as compared with the case where the watertightness of the bottom lids is secured. The accuracy is eased and the manufacturing cost can be reduced.

In the measuring tank, a part of the aggregate and water are poured into the space for accommodating the water-immersed aggregate to measure the water-immersed aggregate, and thereafter, the remaining aggregate and the shortage of water are charged and measured. As long as it can be configured, it is arbitrary how to configure, but a guide body composed of a flat plate is provided at the top opening of the measuring tank body so as to be rotatable around a horizontal axis in the measuring tank. A rotating mechanism for mounting and driving the guide body in the rotating direction is connected and installed to the guide body, and the rotating mechanism is put in a retracted position along the inner surface of the measuring tank body. In the case where the aggregate and the water are respectively configured to be held at the oblique guide positions guided to the water-immersed aggregate receiving space, when a part of the aggregate and the water are initially charged into the measuring tank, Rotation mechanism so that the guide body is held in the diagonal guide position The drive to control.

By doing so, a part of the aggregate and the water, which are poured from above the measuring tank, are guided to the water-immersed aggregate accommodating space by hitting the guide body or sliding down.

When the measurement of the water-immersed aggregate is completed, the rotation mechanism is drive-controlled so that the guide body is held at the retracted position.

In this way, the remaining aggregate and shortage of water, which are poured from above the measuring tank, are accommodated in any place in the measuring tank without being restricted by the guide body.

The volume of the measuring tank is arbitrary, and it may be a unit for blending, that is, the total amount required for one batch, or may be measured in several batches.

[0054] Incidentally, the amount of air in the water-immersed aggregate as a (%), in place of the V _f, the joint use of such a _{V f · (1-a /} 100), further taking into account the amount of air Highly accurate weighing is possible.

[0055]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an aggregate and water measuring device according to the present invention will be described below with reference to the accompanying drawings. It should be noted that parts and the like which are substantially the same as those of the conventional technique are designated by the same reference numerals and the description thereof is omitted.

1 to 3 are views showing an aggregate and water metering device according to this embodiment. FIG. 1 is a front view, FIG. 2 is a right side view, and FIG. 3 is a left side view. is there. As can be seen from these drawings, the aggregate and water measuring device 1 according to the present embodiment
Is a pair of bottom lids 3 that can be opened and closed while maintaining the watertightness of the measuring tank body 2 and its bottom opening.
a and 3b, a load cell 5 as first mass measuring means for measuring the mass of the weighing tank, and a water-immersed fine bone as a water-immersed aggregate accommodating space formed in the tank 4. An ultrasonic sensor 7 as a volume measuring means for measuring the volume of the water-immersed fine aggregate stored in the material storage space 6 is provided, and the weighing tank 4 is supported by the three load cells 5 on the pedestal 10 at a three-point stable state. The ultrasonic sensor 7 is also hung on the pedestal 10.

The measuring tank main body 2 is composed of a box body 8 and a box body 8 so as to be bifurcated downward from the box body.
Of the two branch box bodies 9a and 9b connected to each other, and the inner space of the branch box body 9b of the two branch box bodies is the above-mentioned water-immersed fine aggregate storage space 6
In addition, the pair of bottom lids 3a and 3b described above are configured to close the bottom openings of the branch box bodies 9a and 9b, respectively.

The volume of the measuring tank body 2 is, for example, cement 5
It is conceivable to set the volume so that fine aggregate and water corresponding to 0 kg can be measured.

Here, below both side surfaces of the measuring tank body 2,
The crank-shaped link members 11a and 11b are respectively pin-joined near the center thereof, and the base end sides of the air cylinders 12a and 12b are respectively pin-joined to the upper side surfaces of the weighing tank main body. Shaped link material 1
One end of each of 1a and 11b is connected and fixed to the bottom lid 3a and 3b, respectively, and the other end of each is pin-joined to the tip side of the air cylinders 12a and 12b, respectively.
By operating the air cylinders 12a and 12b, the pair of bottom lids 3a and 3b can be opened and closed.

Here, the crank-shaped link materials 11a, 11
The air blowing nozzle is attached to b, and the pair of bottom lids 3
When a and 3b are opened, it is desirable that the air ejected from the air blowing nozzle blows off the fine aggregate attached to the inner surface side of the bottom lid. According to this structure, it is possible to prevent the watertightness from being deteriorated due to the fine aggregate being sandwiched between the bottom lids 3a and 3b and the bottom opening of the measuring tank body 2.

In the box body 8 of the measuring tank main body 2, FIG.
As can be seen clearly, a guide body 21 formed of a flat plate is attached to the top opening of the measuring tank body so as to be rotatable about a horizontal axis, and the guide body 21 is provided on the front side of the measuring tank body 2. An air cylinder 22 is connected to the guide body 21 as a rotating mechanism for driving the.

Here, in the air cylinder 22, the guide body 21 is at a retracted position along the inner surface of the measuring tank main body 2 and the slant in which the introduced fine aggregate and water are guided to the water-immersed fine aggregate accommodating space 6. It is configured to be held in the guide position and the guide position, respectively.

On the other hand, as shown in detail in FIG. 4, the aggregate and water measuring apparatus 1 according to the present embodiment has a water tank support frame 31 which is installed on the pedestal 10 so as to be movable up and down, and the vicinity of the top of the water tank support frame. A water tank 33 suspended via a load cell 32 as a second mass measuring means, and a chain-type lifting mechanism 34 installed on the gantry 10.
The water supplied to the water-immersed fine aggregate storage space 6 is stored.

The aquarium support frame 31 has two hinges 40 attached to the two legs of the inclinable frame portion 36, which is also in the shape of a gate, at the two tops of the inclinable frame portion 35 in the shape of a square pipe. It is connected through
A foldable operation lever 37 is joined by welding or the like to the vicinity of one leg of the foldable frame portion 36. A bracket 41 is horizontally extended near the center of the top of the collapsible frame 36, and a water tank 33 is hung from the tip of the bracket 41 via a load cell 32.

Here, the water tank supporting frame 31 fixes the vicinity of the lower end of the non-inclinable frame portion 35 and the chain 38 of the chain-type lifting mechanism 34 via the four attachments 39, and the load thereof is applied to the water tank 33. By vertically supporting the chain 38 together with the load and operating the chain operation lever 42 to rotate the chain,
It is constructed so that it can be raised and lowered. Then, the chain-type lifting mechanism 34 raises the water tank support frame 31 to the raised position, and in this state, pulling the tiltable operation lever 37 toward you causes the water tank support frame 31 to move around the hinge 40, as can be seen clearly in FIG. It can be tilted at a predetermined angle.

At this time, by tilting the water tank support frame 31, the discharge port 43 is brought close to the upper opening of the measuring tank 4 while keeping the water tank 33 suspended on the top of the water tank support frame in a horizontal posture. Therefore, the set value of the tilt angle θ is such that when the discharge port 43 of the water tank 33 is brought closer to the upper opening of the measuring tank 4, the water in the water tank 33 is discharged.
It may be appropriately set with reference to whether or not to smoothly flow into the measuring tank 4 via 3, for example, 20 ° to
It is possible to set it at 30 °.

FIG. 5 is a perspective view showing a state in which the water tank support frame 31 is raised to the raised position and the tiltable frame portion 36 is tilted around the hinge 40 toward the weighing tank 4 side. As can be seen, in this state, the discharge port 43 of the water tank 33 moves to above the measuring tank body 2. A chute 44 for preventing water from splashing around is attached to the discharge port 43.

Further, on the side surface of the non-tiltable frame portion 35 and the side surface of the collapsible frame portion 36, projections 51 constituted by flat bars are attached, and as shown in FIG. 6, they are attached to the angle 55 of the pedestal 10. Roller Follower 5
The cam follower 5 fixed to the angle 55 with the bolt 54 while supporting the projection 51 laterally with its front face with
The projections 51 are laterally supported by the side surfaces of the projections 3 and 53, and the roller follower 52 and the cam follower 53,
53, the water tank support frame 31 is prevented from rattling or falling in a plane.

In order to prevent the water tank 33 from shaking and the load cell 32 from being damaged during transportation, the water tank 33 can be temporarily mounted on the bracket 45 after being mounted on the bracket 45.

As shown in FIGS. 1 and 2, the bracket 41 is provided with a water feed electromagnetic valve 46a, a water feed fine adjustment electromagnetic valve 46b and an admixture electromagnetic valve 46c, which are respectively connected to the hoses 47a. , The water tank 48a, the water tank 48a, and the admixture tank 48c via hoses 47b and 47c, and the water tank 4a is controlled by drivingly controlling the water feed pump 49a.
The admixture in the admixture tank 48c can be added to the water tank 33 by putting the water in the 8a into the water tank 33 and drivingly controlling the admixture pump 49c.

Further, in the fine aggregate and water measuring device 1 according to the present embodiment, as well understood from FIG. 1, a sieve 23 is attached to the top of the pedestal 10 and in order to avoid interference with the sieve, A belt conveyor support base 65 formed in a gate shape so as to surround the sieve 23 is provided on the top of the gantry 10, and the sieve 23 is supplied from the belt conveyor 64 mounted on the belt conveyor support base 65. It is designed to remove wood chips and debris that are mixed in. Here, the screen 23 is configured so that its inclination angle can be adjusted according to the angle of the belt conveyor 64.

Further, in the fine aggregate and water measuring apparatus 1 according to the present embodiment, as can be seen clearly in FIG. 3, a hopper 24 composed of a box body tapering downward is provided at a lower position of the measuring tank 4. In addition, when the bottom lids 3a and 3b of the measuring tank 4 are opened to drop the fine aggregate and water after the measurement of the fine aggregate and water is finished, the fine aggregate and water are spread around. It can be dropped onto a belt conveyor, a kneading mixer, or the like (not shown) installed below it without scattering.

Here, the hopper 24 is attached to the pedestal 10 via the elastic support 25, and a vibrator 26 is provided on the back surface thereof, so that the earth and sand attached to the inner surface of the hopper 24 can be dropped by vibration. It is like this. Further, as can be seen in FIG. 1 in the hopper 24, several piano wires 27 are stretched in parallel with the internal space to prevent falling earth and sand from forming a clod. ing.

When the water level of the water-immersed fine aggregate is measured by the ultrasonic sensor 7 and the volume is obtained using the measured value, it is necessary to secure sufficient accuracy of the vertical posture of the measuring tank 4. However, as shown in FIG. 3, the level 10 is provided on the gantry 10, and the height-adjustable jack base 63 is attached to the legs of the level 61.
By operating the jack base 63 while looking at 1, the vertical posture of the measuring tank 4 can be secured.

Aggregate and water metering device 1 according to the present embodiment
In (1), first, the water tank 33 temporarily fixed to the bracket 45 in the lowered position is removed from the bracket, and then the chain operation lever 42 is turned to raise the water tank support frame 31. While ascending, the front surface of the protrusion 51 attached to the side surfaces of the non-tiltable frame portion 35 and the tiltable frame portion 36 is laterally supported by the roller follower 52, and both side surfaces thereof are laterally supported by the cam followers 53, 53. Since it is supported, the water tank support frame 31 is lifted by the chain-type lifting mechanism 34 while maintaining the vertical posture.

When the water tank 33 reaches the raised position, in this state, the tiltable operating lever 37 is pulled to the front as described with reference to FIG. 4, and the water tank support frame 31 is rotated around the hinge 40 by a predetermined angle. To the side of.

Next, water is stored in the water tank 33 with the valve of the discharge port 43 closed. When storing water, the water in the water tank 48a is put in the water tank 33 by drivingly controlling the water feed pump 49a, and the admixture pump 49c is driven and controlled so that the water in the admixture tank 48c is stored. The admixture of 2 may be added to the water tank 33.

In some cases, the work of introducing water or the admixture and the work of tilting the water tank support frame 31 may be reversed.

Next, the amount of water stored in the water tank 33 is changed to M.
_The load cell 32 is measured as _I in advance.

Simultaneously with or before or after the mass measurement of water, the air cylinder 22 is driven and controlled, and the guide body 21 installed in the measuring tank body 2 is rotated to the diagonal guide position shown in FIG. Hold.

Next, the valve of the discharge port 43 of the water tank 33 is opened to feed the water in the water tank into the measuring tank body 2.

Since the guide body 21 is held at the oblique guide position as described above, the introduced water is smoothly guided to the water-immersed fine aggregate storage space 6 as shown in FIG. .

Next, a part of the fine aggregate conveyed by the belt conveyor 64 is put into the measuring tank main body 2. Even in this case, since the guide body 21 is held at the slanting guide position, the injected fine aggregate is, as shown in FIG. 7, along the guide body 21 or while hitting it, the water-immersed fine aggregate storage space. It is smoothly guided to 6 and becomes a water-immersed fine aggregate.

When the fine aggregate and the water are put into the water-immersed fine aggregate storage space 6, which one precedes is arbitrary, but as described above, the water is put in advance and then the fine aggregate is added. If it is introduced, it becomes possible to considerably suppress the inclusion of air bubbles in the water-immersed fine aggregate.

Next, the total mass M _f and the total volume V _f of the water-immersed fine aggregate are measured by the load cell 5 and the ultrasonic sensor 7, respectively, to obtain the mass M _a of the fine aggregate in the surface dry state and the fine aggregate. The mass M _w of water including the surface water of the aggregate is calculated by solving the following equation. _{M a + M w = M f} (1) M a / ρ a + M w / ρ w = V f (2)

Here, ρ _a is the density of the fine aggregate in the surface dry state, and ρ _w is the density of water.

Next, the total mass M _f and the water supply amount M _I to the measuring tank measured in advance are substituted into the following equation: M _aw = M _f −M _I (3) _Calculate the mass M _aw of the material and _{calculate the} M
The _aw, the following equation, by substituting the _{(M aw -M a) / M} a (4), determine the surface water ratio of the aggregate.

Next, the air cylinder 22 is drive-controlled to rotate the guide body 21 installed in the measuring tank body 2 to hold it in the retracted position shown in FIG. 8, and in this state, the remaining fine aggregate and If necessary, the additional water is added to the measuring tank 4.

By retracting the guide body 21 in this way,
No problem occurs when the remaining fine aggregate and the shortage of water are put into the measuring tank 4.

Next, the total mass of the water-immersed fine aggregate is measured by the load cell 5. The shortage of water is measured by the load cell 32 in advance as described above.

Here, the increased mass is composed of the mass of the fine aggregate additionally charged in the surface dry state, the surface water of the fine aggregate and the additionally supplied shortage water, and the surface water ratio of the fine aggregate is And the deficient water mass has already been calculated or measured.

Therefore, the increased mass can be divided into the mass of the fine aggregate in the surface dry state and the mass of water including the surface water of the fine aggregate. It is possible to calculate the mass of fine aggregate and water in a state where the surface water of the fine aggregate is accurately reflected.

When the fine aggregate and water are accurately measured in the measuring tank 4 as described above, the bottom lids 3a and 3b of the measuring tank 4 are opened as shown in FIG. 9, and the fine aggregate in the measuring tank is opened. And water is dropped downward through the hopper 24. In addition, in the figure, only the bottom lid 3b is shown in an open state for the sake of convenience so that the difference between the opened and closed states of the bottom lids 3a and 3b can be clearly understood.

Next, using the weighed fine aggregate and water,
For example, spray mortar is appropriately manufactured.

If the water-immersed fine aggregate or the fine aggregate cannot be completely free-falled due to adhesion of the fine aggregate to the inner surface of the measuring tank 4 or compaction of the fine aggregate, etc., a vibrator, a knocker, etc. The vibration imparting device may be appropriately attached to the side surface of the measuring tank 4.

The various control, driving operation, measurement or calculation based on the measurement described above is performed by the control panel 62 shown in FIG.

As described above, according to the aggregate and water measuring apparatus 1 according to the present embodiment, the fine aggregate is relatively larger than the water because the mixture is poor, and the fine aggregate is small. Even if it is not possible to measure all of the above as water-infiltrated fine aggregates, the remaining fine bones that could not be measured as water-infiltrated fine aggregates were It becomes possible to measure the material and its surface water with sufficient accuracy.

Regarding fine aggregate and water measured by the water-immersed fine aggregate, indirectly as a part of the mass M _w of water in a state in which the variation between fine aggregates having different wet states is taken into consideration. it is possible to calculate the mass of the fine aggregate, it is possible to grasp as a mass M _a time table dry state, it is possible to adjust the mass of the fine aggregate and water How to Display formulation.

Further, according to the aggregate and water measuring apparatus 1 of the present embodiment, the water tank support frame 31 is installed so as to be able to move up and down, and the water tank 33 is hung via the load cell 32 near the top of the water tank support frame. Since it is held, the total height of the weighing device 1 according to the present embodiment can be kept low during transportation, the water tank 33 suspended from the water tank support frame 31 is prevented from shaking, and the load cell 32 is damaged. On the other hand, it is possible to prevent the water in the water tank 33 from flowing smoothly into the measuring tank 4 during use.

According to the aggregate and water measuring apparatus 1 of the present embodiment, the gantry 10 is provided with the chain-type lifting mechanism 34, and the water tank support frame 31 is provided with the non-foldable frame portion 35 and the non-foldable frame. The inclinable frame portion 36 hinged to the top of the inclinable frame portion and the inclinable operation lever 37 connected to the inclinable frame portion,
Is fixed to the chain 38 of the chain-type lifting mechanism 34 in a vertical posture, and the water tank 33 is suspended near the top of the inclinable frame portion 36.
The water tank 33 hung on the top of 6 moves horizontally from the lateral position of the gantry 10 to above the weighing tank 4 while maintaining the horizontal posture. Therefore, it becomes possible to more smoothly add water to the measuring tank 4.

In addition, according to the aggregate and water measuring apparatus 1 of the present embodiment, the bottom openings of the branch box bodies 9a and 9b are closed by the pair of bottom lids 3a and 3b, respectively. The lower space in the height direction required for opening and closing the lids 3a and 3b is small, and it is sufficient to ensure the water tightness between each bottom lid and each bottom opening.
As compared with the structure in which the watertightness of the bottom lids is secured, the manufacturing accuracy of the bottom lids is relaxed, and the manufacturing cost can be reduced.

In addition, according to the aggregate and water measuring apparatus 1 of the present embodiment, the fine aggregate and water charged from above the measuring tank 4 are caused to hit the guide body 21 or slide down. However, it is possible to reliably guide the water-immersed fine aggregate storage space 6.

Further, according to the aggregate and water measuring apparatus 1 of this embodiment, the level 10 is provided on the gantry 10 and the height-adjustable jack base 63 is attached to the legs thereof. Jack base 6 while looking at vessel 61
By operating 3, it is possible to secure sufficient accuracy of the vertical posture of the measuring tank 4 when measuring the water level of the water-immersed fine aggregate with the ultrasonic sensor 7, and drive the chain-type lifting mechanism 34. By doing so, it is possible to smoothly perform the lifting operation of the water tank support frame 31.

Although not particularly mentioned in the present embodiment, the amount of air in the water-immersed fine aggregate is a (%), and V _f is replaced by V _f.
-By using (1-a / 100), it is possible to perform more accurate weighing considering the amount of air.

Further, although the present embodiment has been described on the premise that the aggregate is a fine aggregate and this is used as a material for spraying mortar, the present invention is not limited to such contents, and concrete is not limited thereto. It goes without saying that the present invention can also be applied to the case of measuring coarse aggregate as a material. Further, the present invention is not premised on the use of measured coarse aggregate or fine aggregate in sprayed mortar or sprayed concrete, and the total amount of aggregate cannot be measured by the water-immersed aggregate method. This is based on the case, and in such a case, the present invention can be applied to all of them.

Further, in the present embodiment, the air cylinders 12a, 12 are provided as mechanisms for freely opening and closing the bottom lids 3a, 3b in a state where the bottom opening of the measuring tank body 2 is kept watertight.
Although b is adopted, the bottom lid opening / closing mechanism is not limited to the air cylinder, and a hydraulic actuator may be used when the scale of the apparatus becomes large. The same applies to the air cylinder 22 as a rotating mechanism that rotates the guide body 21.

Although not particularly mentioned in the present embodiment, in the case where there is a possibility that the fine aggregate put into the water-immersed fine aggregate accommodating space 6 may come out of the water surface and not become the water-immersed fine aggregate. , The vibrator is lowered during or after the introduction of the fine aggregate, and the vibrator is operated in such a state so that the fine aggregate introduced into the water-immersed fine aggregate accommodation space 6 in the measuring tank 4 is vibrated. It is possible to evenly flatten it by the vibration of so that the fine aggregate does not appear on the water surface. When the mass of the water-immersed fine aggregate is measured, the vibrator may be pulled up and retracted to the next measurement at the raised position.

Further, in this embodiment, the load cells 5, 32 are
Was used as a tension type, however, what kind of load cell is used as the mass measuring means is arbitrary, and the number thereof is also arbitrary. The mass measuring device according to the present invention is not limited to such a load cell in the first place.

Further, in this embodiment, the water tank 33 is hung on the vertically movable water tank support frame 31, but if there is no problem in transportation, the water tank support frame is omitted and the water tank 33 is mounted on the mount 10. You may hang it directly on the.

Further, in the present embodiment, the water tank support frame 31 is made foldable, but if there is no problem in supplying water to the measuring tank 4, it is necessary to make the water tank support frame foldable. Nor.

Further, in this embodiment, the measuring tank main body 2 is
The box body 8 and two branch box bodies 9a and 9b that are connected to the box body 8 so as to bifurcate downward from the box body, and the inside of one of the two branch box bodies Space for water immersion fine aggregate 6
In addition, the bottom lid is a pair of bottom lids 3a and 3b, and each bottom lid is configured to close each bottom opening of the two branch box bodies 9a and 9b. As long as the water-immersed aggregate accommodation space for accommodating the water-immersed aggregate is formed, the configuration is arbitrary, and the bottom lid is also kept watertight at the bottom opening of the measuring tank body. Any configuration may be used as long as it can be opened and closed with.

For example, the measuring tank main body is composed of a single box body, and a predetermined partition body is provided in the box body so that the lower end is at the same height as the bottom opening of the box body, and is partitioned by the partition body. It is conceivable that the space extending to one side is used as the water-immersed aggregate storage space.

In this case, the bottom lid may be constructed so as to open and close the entire bottom opening of the box body, but the bottom opening of the two spaces partitioned by the partition body described above is individually opened and closed. When the bottom lid is composed of a pair of bottom lids, a lower space in the height direction required for opening and closing the bottom lid is small.

Further, it is conceivable that the partition body is formed to have a predetermined thickness and each bottom opening of the two spaces partitioned by the partition body is closed by the bottom lid.

According to this structure, it is sufficient to ensure the watertightness of each bottom lid and the bottom opening closed by the bottom lid. Therefore, the bottom lids are manufactured as compared with the case where the bottom lids are watertight. The accuracy is eased and the manufacturing cost can be reduced.

[0116]

As described above, according to the aggregate and water measuring apparatus of the present invention, the fine aggregate is relatively larger than the water because of the poor mixture, and the fine aggregate is relatively small. Even if it is not possible to measure all of the above as water-infiltrated fine aggregates, the remaining fine bones that could not be measured as water-infiltrated fine aggregates were It becomes possible to measure the material and its surface water with sufficient accuracy.

For fine aggregate and water measured by the water-immersed fine aggregate, indirectly, as a part of the mass M _w of water, in consideration of the variation between fine aggregates having different wet states. it is possible to calculate the mass of the fine aggregate, it is possible to grasp as a mass M _a time table dry state, it is possible to adjust the mass of the fine aggregate and water How to Display formulation.

[0118]

[Brief description of drawings]

FIG. 1 is a front view showing an aggregate and water measuring device according to an embodiment.

FIG. 2 is a right side view showing an aggregate and water measuring device according to the present embodiment.

FIG. 3 is a left side view showing an aggregate and water measuring device according to the present embodiment.

FIG. 4 is a view showing a water tank support frame 31, a water tank 33 suspended on the water tank support frame, and a chain-type lifting mechanism 34 for moving the water tank support frame 31 up and down, (a) is a front view, and (b) is a view. Is a right side view.

FIG. 5 is a perspective view showing a state in which a collapsible frame portion 36 of the water tank supporting frame 31 is tilted toward the weighing tank 2 side.

FIG. 6 is a projection 51, a roller follower 52, and cam followers 53, 53 attached to the side surface of the retractable frame portion 36.
3 is a partial perspective view showing a relative positional relationship with FIG.

FIG. 7 is a diagram showing how the aggregate and water measuring device according to the present embodiment is used for measuring.

FIG. 8 is a diagram showing a manner of measuring using the aggregate and water measuring device according to the present embodiment.

FIG. 9 is a diagram showing how the aggregate and water measuring device according to the present embodiment is used for measuring.

[Explanation of symbols]

1 Aggregate and Water Measuring Device 5 Load Cell (First Mass Measuring Means) 4 Measuring Tank 2 Measuring Tank Main Body 3a, 3b Bottom Lids 9a, 9b Branch Box Body 6 Water-immersed Fine Aggregate Storage Space (Water-immersed Aggregate Storage 7) Ultrasonic sensor (volume measuring means) 8 Box body 21 Guide body 22 Air cylinder 31 Water tank support frame 32 Load cell (second mass measuring means) 33 Water tank 34 Chain type lifting mechanism 35 Non-collapsible frame section 36 Collapsible Frame 37 Tilting lever 38 Chain 61 Level 63 Jack base

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigeyuki Togawa             4-640 Shimoseito, Kiyose-shi, Tokyo Co., Ltd.             Obayashi Technical Research Institute (72) Inventor Ryuichi Chikamatsu             4-640 Shimoseito, Kiyose-shi, Tokyo Co., Ltd.             Obayashi Technical Research Institute (72) Inventor Kenzo Saito             4-1-1-502 Takahana, Inzai City, Chiba Prefecture (72) Inventor Mitsuhiro Yoshida             1-26-24 Higashikawaguchi, Kawaguchi City, Saitama Prefecture (72) Inventor Naoki Tokunaga             3-29-14 Shinjuku, Katsushika-ku, Tokyo (72) Inventor Keio Wada             Chiba Prefecture Ichikawa City Tajiri 1-11-7 Sanwa Sangyo Co., Ltd.             Ceremony company Ichikawa factory

Claims (9)

[Claims] 1. A weighing tank comprising a weighing tank main body and a bottom lid that can be opened and closed while keeping the watertightness of the main body, and an aggregate and water introduced into the weighing tank. First mass measuring means for measuring mass, volume measuring means for measuring the volume of the water-immersed aggregate stored in the water-immersed aggregate housing space formed in the measuring tank, and the water-immersed aggregate housing An aggregate and water measuring device comprising: a water tank for storing water supplied to the space; and a second mass measuring means for measuring the mass of water in the water tank. 2. A weighing tank comprising a weighing tank main body and a bottom lid that can be opened and closed freely while keeping the watertightness of the bottom opening, and the weighing tank via a first mass measuring means. A pedestal that suspends, a volume measuring unit that measures the volume of the water-immersed aggregate stored in the measuring tank or the water-immersed aggregate storage space that is formed in the measuring tank and is formed in the measuring tank, and the platform. A predetermined water tank support frame installed so as to be able to move up and down, and for storing water supplied to the water-immersed aggregate storage space, and a second mass measuring means in the vicinity of the top of the water tank support frame. An aggregate and water metering device comprising: a suspended water tank. 3. A chain-type lifting mechanism is provided on the gantry, and the aquarium support frame is hinged to the non-foldable frame part, the top of the non-foldable frame part, and the tiltable frame part. The non-foldable frame part is fixed to the chain of the chain-type lifting mechanism in a vertical posture, and the water tank is hung near the top of the tiltable frame part. The aggregate and water measuring device according to claim 2. 4. The measuring tank main body is composed of a single box body, and a predetermined partition body is provided in the box body so that the lower end is flush with the bottom opening of the box body, and the partition body is used for partitioning. The aggregate and water measuring device according to any one of claims 1 to 3, wherein the space that extends to one side is the water-immersed aggregate accommodation space. 5. The aggregate and water metering device according to claim 4, wherein the bottom lid is composed of a pair of bottom lids so as to individually open and close the bottom openings of the two spaces partitioned by the partition body. 6. The aggregate and water according to claim 5, wherein the partition body is formed to have a predetermined thickness, and each bottom opening of the two spaces partitioned by the partition body is closed by each bottom lid. Weighing device. 7. The main body of the measuring tank is composed of a predetermined box body and two branch box bodies connected to the box body so as to bifurcate downward from the box body, and the two box bodies are connected. Of the branch box bodies, one inner space is used as the water-immersed aggregate accommodating space, the bottom lids are a pair of bottom lids, and each bottom lid closes each bottom opening of the two branch box bodies. The aggregate and water measuring device according to any one of claims 1 to 3, which is configured as described above. 8. A rotary body for driving the guide body in a rotating direction by attaching a guide body made of a flat plate to the top opening of the main body of the measuring tank so as to be rotatable around a horizontal axis in the measuring tank. A moving mechanism is connected to the guide body and installed,
In the rotating mechanism, the guide body is held at a retracted position along the inner surface of the measuring tank body and an oblique guide position in which the charged aggregate and water are guided to the water-immersed aggregate storage space. The aggregate and water measuring device according to any one of claims 1 to 3, which is configured as described above. 9. The aggregate and water measuring device according to claim 2, wherein a level is provided on the gantry, and a height-adjustable jack base is attached to a leg of the gantry. .