JP2001105423A - Method and apparatus for manufacturing concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a concrete capable of manufacturing and supplying the concrete without using a special purpose concrete kneading mixer. SOLUTION: A metered gravel G, sand S and cement C are sequentially laminated on a belt conveyor 10, and directly charged in and supplied to a drum of a concrete mixer vehicle CF through a material charging chute 1. Then, kneading water and an admixture are also charged and supplied. When charged and supplied, the metered gravel G, the sand S and the cement C are controlled to as to be simultaneously started to be charged and simultaneously finished to be charged. After charged in and supplied to the vehicle, the drum is switched to a high speed for a predetermined time, thereby manufacturing the concrete of predetermined quality.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete mixer truck, in which a concrete material such as cement, sand, gravel, etc. and auxiliary agents such as kneading water and admixtures are directly fed to a concrete mixer truck using a conveyor such as a belt conveyor. TECHNICAL FIELD The present invention relates to a concrete manufacturing method and a concrete manufacturing apparatus for manufacturing concrete by feeding and supplying concrete to concrete.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional concrete production apparatus, that is, a batcher plant, includes a concrete kneading mixer 50 arranged at a predetermined height. Then, the concrete mixer truck CV enters under the concrete mixing mixer 50, and the concrete manufactured by the concrete mixing mixer 50 is supplied to the concrete mixer truck CV via the concrete hopper 51 by gravity. ing.

[0003] Such a batcher plant is well known in the art and will not be described in detail. However, as shown in FIG. 4, a gravel measuring machine is provided above a concrete mixing mixer 50. A weighing device 60 including a sand weighing machine 61, a sand weighing machine 62, a cement weighing machine 63 and the like is arranged, and a material storage bin device 70 including a gravel storage bin 71, a sand storage bin 72, a cement storage bin 73 and the like are provided above the weighing device 60. ing. The concrete mixing mixer 50, the weighing device 60, and the material storage bin device 70 are provided in a layered structure assembled at a predetermined height above the ground.
On the other hand, below the above-mentioned cement storage silo 80, an air transport pipe 81 extending to the cement storage bin 73 is provided. In addition, a first aggregate receiving belt conveyor 93 that is disposed substantially horizontally is provided below an aggregate storage silo 90 including a sand storage silo 91, a gravel storage silo 92, and the like that are also installed on the ground. The first aggregate receiving belt conveyor 93 is distributed to a sorting device 95 via a second aggregate receiving belt conveyor 94 which is arranged in an inclined manner.
It is connected to the. Therefore, the gravel and the sand sent from the first and second aggregate receiving belt conveyors 93 and 94 from the aggregate storage silo 90 are distributed to the gravel storage bin 71 and the sand storage bin 72 by the distribution device 95, respectively.

[0004] Since the conventional batcher plant is constructed as described above, concrete is manufactured as follows and supplied to the concrete mixer truck CV. That is, the blower 82 for cement feed is activated to transport an appropriate amount of cement in the cement silo 80 to the cement storage bin 73. Similarly, the first and second aggregate receiving belt conveyors 93 and 94 transport and store the gravel and sand of the aggregate storage silo 90 in the respective storage bins 71 and 72. The opening and closing gates of the respective storage bins 71 to 73 are opened, and supplied to the cement weighing machine 63, the gravel weighing machine 62, and the sand weighing machine 61 to measure a predetermined amount of cement, sand and gravel. On the other hand, kneading water and admixture meter 10
The sum of the admixture and the admixture measured at 0 is measured by the water meter 101. Then, concrete is manufactured in a short time by supplying the measured concrete raw material to the activated concrete kneading mixer 50. After the kneading is completed, the gate of the concrete kneading mixer 50 is opened, and the mixture is supplied to the allocated concrete mixer truck CV via the concrete hopper 51 by gravity.

[0005]

As described above, concrete is manufactured by the conventional batcher plant, and there are various advantages. For example, since the storage bin device 70, the weighing device 60, and the concrete kneading mixer 50 are arranged vertically, there is an advantage that the concrete material, the manufactured concrete, and the like can be sequentially transferred by gravity. Also, the produced concrete,
It can also be dropped and supplied to the concrete mixer truck CV allocated for shipment in a short time. In particular, since it is kneaded by the dedicated concrete kneading mixer 50, there is an advantage that when supplying aggregate, cement, etc. to the mixer, it is not particularly restricted by the supply order, the supply method and the like. However, there are many problems. That is, the conventional batcher plant is
Since the concrete kneading mixer 50 is provided, and the weighing device 60, the storage bin device 70, and the like are arranged above the concrete kneading mixer 50, there is a disadvantage that the entire batcher plant becomes high. When the height is increased, the transport distance from the aggregate storage silo 90 or the cement silo 80 generally provided on the ground to the storage bin device 70 is increased, so that the construction cost of the batcher plant is increased and the power cost for transporting the concrete material is increased. Will also increase. Furthermore, since the concrete mixing mixer 50 is provided, the power consumption is large, and there is a major problem of maintenance and inspection of the concrete mixing mixer 50, for example, cleaning after operation. Also, the conventional batcher plant,
Although automation is progressing, concrete mixing mixer 50
Therefore, there is a problem that a specialized operator for monitoring this is required, and it cannot be completely unmanned.

[0006] Such a problem is considered to be solved by kneading the concrete raw material in a concrete mixer truck, but has not been implemented in Japan for the following reasons. That is, a concrete mixer truck receives concrete kneaded to a required quality by a concrete kneading mixer set in a concrete manufacturing apparatus, and drums the concrete to a concrete placing site so that the quality of the concrete does not change or solidification occurs. It is used to transport while rotating at a low speed, reach the site and rotate at a high speed for a short time just before casting, then reverse the drum and discharge it, and use it to place concrete that is the same as when receiving it, In order to fulfill the function, a stirring blade is mounted in the drum. Therefore, concrete has a certain stirring ability, so that concrete can be obtained even if the concrete raw material is directly charged into the concrete mixer truck. However, since the kneading capacity is lower than that of the concrete mixing mixer, it is necessary to rotate the drum at a high speed for a long time when trying to obtain the required concrete directly with the concrete mixer truck without using the concrete mixing mixer.
This is because there are problems in efficiency, quality, noise, and the like.

On the other hand, outside Japan, a water tank is mounted on a concrete mixer truck, and concrete materials such as aggregates and cement are directly injected into the concrete mixer truck.
Such as transporting the drum to the casting site while rotating it, and placing the concrete obtained by rotating the drum at a high speed for a predetermined time while spraying the water in the water tank mounted on the concrete mixer truck at the casting site, In some countries, the so-called dry touch method is used. However,
In this method, the management and operation of the mixing water depend on the driver's feeling of the concrete mixer truck, and not only can concrete of stable quality not be obtained, but also the concrete material adheres to the aggregate during transportation. There is also a disadvantage that the cement adheres to the drum, the stirring blade and the like due to a small amount of moisture and solidifies.

The present invention aims to provide a concrete manufacturing method and a concrete manufacturing apparatus which solve the above-mentioned problems, and more specifically, concrete is provided without installing a fixed concrete kneading mixer. It is an object of the present invention to provide a concrete manufacturing method and a concrete manufacturing apparatus that can be manufactured.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to directly meter a concrete material such as gravel, sand, cement, water and an admixture into a concrete mixer truck, and to carry out the concrete mixer truck at a high speed for a predetermined time. This is achieved by rotating the drum. However, as described above, the concrete mixer truck is not dedicated to concrete kneading, and thus a method of supplying concrete raw materials to the concrete mixer truck has been devised. That is, in order to achieve the above object, the present invention does not provide a concrete mixer for stationary mixing, but directly weighs concrete raw material composed of gravel, sand, cement, water, an admixture and the like to a concrete mixer truck. Is a method of manufacturing the required concrete by periodically supplying and supplying, using a single common conveyor such as a belt conveyor, the measured gravel, sand,
When discharging materials such as cement from each weighing machine,
On the conveyor surface, these materials are discharged from the weighing machine so that they have a strip-shaped laminar cross section according to their respective mixing ratios, and the cement is the top layer or the middle layer of gravel and sand aggregate. The start and end times are controlled, the material almost completely laminated and dispersed in a strip shape is directly charged into a concrete mixer truck, and the measured kneading water and admixture are supplied through a pipe equipped with a valve capable of adjusting the flow rate. Then, the concrete mixer truck is directly put into a concrete mixer truck, and the drum of the concrete mixer truck is switched to high-speed rotation for a predetermined time after each raw material is charged, and is operated to obtain a required concrete. The invention according to claim 2 is characterized in that a fixed concrete kneading mixer is not installed, and gravel, sand, cement,
This is a method of manufacturing concrete by directly feeding and supplying concrete raw materials consisting of water, admixtures, etc. to a concrete mixer truck, and a belt is provided at the bottom of a concrete material measuring machine such as gravel, sand, cement, etc. Conveying means such as conveyors are provided, and through these conveying means, these materials are supplied from the respective weighing machines at substantially the same time, or the cement is slightly delayed, and both are introduced into the concrete mixer truck at substantially the same time. By controlling the discharge amount and discharge time, each material is dispersed at almost the same mixing ratio and put into the concrete mixer truck, and at the same time, piping with a valve that can adjust the flow rate of the measured kneading water and admixture is installed. Through the concrete mixer truck, and switch the drum of the concrete mixer truck to high-speed rotation for a predetermined time after each raw material is charged. And configured to obtain the required concrete. According to a third aspect of the present invention, a weighing object discharging means such as a vibration feeder capable of adjusting a flow rate is attached to a lower portion of each weighing machine for concrete material such as gravel, sand, cement, and the like, and the discharging of each weighing material discharging means is performed. Each weighing machine is arranged so that the ends are arranged in series, and a single common conveyor device such as a belt conveyor is provided below the discharge end of the weighed object unloading means, and the weighed items on the conveying device are already measured. gravel,
In discharging materials such as sand and cement through respective weighing machines and weighing material discharging means, these materials have a band-shaped laminated cross section according to their respective mixing ratios on the conveying device surface, and the cement is the uppermost layer or gravel, The discharge amount from the weighing machine and the discharge start and end times are controlled by the weighing material discharging means so as to form an intermediate layer of the sand aggregate, and the material almost completely laminated and dispersed in the belt shape is fed to the material input chute. Into the concrete mixer truck directly through the piping equipped with a valve capable of adjusting the flow rate of the kneading water and the admixture, and directly into the concrete mixer truck for a predetermined time after each raw material has been charged. By switching the drum to high-speed rotation and operating to obtain the required concrete, the fixed concrete mixing mixer is not installed. It is. According to a fourth aspect of the present invention, a weighing object carrying means such as a vibratory feeder capable of adjusting a flow rate is attached to a lower portion of each weighing machine for concrete material such as gravel, sand, cement, and the like. A transport device such as a belt feeder is provided below the weighed object unloading means,
Each weighing machine is arranged such that the weighed material discharge means or the discharge end of the transport device is arranged around a material input chute provided on the concrete mixer truck, and the weighed materials are substantially simultaneously discharged. Or the cement is slightly delayed, and at the same time, each material discharge means is controlled so as to be directly charged into the concrete mixer truck through the material charging chute, and the flow rate of the measured kneading water and admixture is controlled. The concrete mixer truck was put directly into the concrete mixer truck through a pipe equipped with an adjustable valve, and the drums of the concrete mixer truck were switched to high-speed rotation for a predetermined time after each raw material was charged, and the concrete was fixed. It is configured so that the concrete mixing mixer is not mounted. The invention described in claim 5 is the invention according to claim 3 or 4
7. A material storage hopper is provided in place of the material input chute described in (1), and the material transported from the transport device is temporarily stored in the material storage hopper, and then is charged into a concrete mixer truck. The invention relates to claims 3 to
The metered kneading water and admixture according to any one of the items 5 is supplied through a pipe equipped with a flow rate control valve, by a nozzle or a slit provided around a lower outer wall of a material input chute or a material storage hopper. When a material such as gravel, sand, cement or the like is charged into the concrete mixer vehicle, the material is dispersed and charged, and the charging flow rate and charging time are controlled by the flow rate control valve.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a concrete manufacturing apparatus will be described below. FIG. 1 is a schematic view of a concrete manufacturing apparatus according to a first embodiment of the present invention. As shown in FIG. 1, according to the first embodiment,
The concrete manufacturing apparatus includes a material charging chute 1 provided at a higher position than the concrete mixer truck CV, as shown in a substantially central portion of FIG. A concrete material such as cement or aggregate is directly injected from the material input chute 1 into a concrete mixer truck CV that is entered below the cement material.
As described above, according to the present embodiment, since the concrete material is directly charged into the concrete mixer truck CV,
There is no need for a dedicated concrete kneading mixer unlike a conventional batcher plant.

In order to supply a concrete material to such a material charging chute 1, a belt conveyor 10 which is obliquely provided is provided in the present embodiment. And, corresponding to the belt conveyor 10, a gravel measuring machine 20 for measuring the gravel at its lowermost position, that is, the most upstream side, a sand measuring machine 20a for measuring sand on its downstream side, and a most downstream side, A cement weighing machine 20c is provided near the end of the belt conveyor 10. Above the gravel weighing machine 20,
Gravel storage bin 2 through gate 21 of conventionally well-known form
5 and above the sand weighing machine 20a, the gate 2
Sand storage bins 25b are respectively provided via 1a. The cement metering machine 20b is provided with a screw conveyor 26 and a metering screw conveyor 27 which are drawn directly from the cement silo 25b instead of the storage bin, and the cement is supplied directly from the gate 21b.

The concrete manufacturing apparatus includes a water meter 30 and a water temporary storage tank 3 as in the conventional batcher plant.
1. An admixture meter 32 is also provided. The kneading water pumped by the water pump 33 passes through the pipe 34 through the water meter 30.
Meanwhile, the admixture similarly pumped by the admixture pump 35 is supplied to the admixture meter 32 via a pipe 36. Further, the admixture measured by the admixture meter 32 is supplied to the water meter 30 via the pipe 37, and the total amount of the admixture and water is measured. Then, the measured water and the admixture are stored in the temporary water storage tank 31 through the pipe 38. The water and the admixture stored in the temporary water storage tank 31 are supplied directly to the concrete mixer truck CV through the water input pipe 39 via the flow control valve 40 attached to the lower part of the temporary water storage tank 31. ing. In addition, the water meter 30, the admixture meter 32, and the like are provided with, for example, an electromagnetic on-off valve as is well known in the related art, but these valves are only schematically shown in FIG. .

FIG. 2 shows details of the gravel and sand weighing machines 20 and 20a, the material input chute 1 and the like. The gravel weighing machine 20 is generally funnel-shaped as a whole, but an opening / closing gate 23 that is opened and closed by, for example, an air cylinder 22 is provided below the gravel weighing machine 20, and an electromagnetic vibration feeder 24 that can control a flow rate is further provided below the gate 23. Is provided. The electromagnetic vibration feeder 24 has a plurality of coil springs 25, 25,... With the discharge end facing the belt conveyor 10.
Hanged by. Then, the electromagnetic vibration feeder 24 shown in this schematic diagram can control the flow rate by an inverter. Below the sand weighing machine 20a and the cement weighing machine 20b, similar open / close gates 23a and 23b, an electromagnetic vibration feeder 24a,
24b and the like are provided.
Has the same structure as the opening / closing gate 23, the electromagnetic vibration feeder 24, etc. provided in connection with, and the same reference numerals will be denoted by "a" or "b" and will not be described repeatedly.

The belt conveyor 10 is shown in FIG.
As shown in the cross section, a horizontal row 12 for supporting a belt 11 and a guide roller 1 for supporting a side obliquely.
3, 13, side plates 14 provided on both sides of the belt,
It consists of 14 mag. In the present embodiment, gravel, sand and cement are transported to the material input chute 1 with the gravel as the lower layer and the cement as the uppermost layer. For this purpose, the speed of the belt conveyor 10 and the supply of gravel, sand and cement are controlled as follows. That is, the distance between the discharge ends of the electromagnetic vibration feeders 24 and 24a is L
1. Assuming that the speed of the belt conveyor 10 is V, the belt conveyor 10 advances the interval L1 in L1 / V time. Therefore, when sand is supplied from the vibration feeder 24a on the downstream side after L1 / V time after the flow rate is controlled from the electromagnetic vibration feeder 24 at the most upstream position and supply of the gravel to the belt conveyor 10 is started, the lower part of the vibration feeder 24a The sand will be supplied over the gravel that has reached. Similarly, the supply of cement is started with a time lag. Thus, the gravel, sand, and cement are supplied to the material input chute 1 in a layered manner. FIG. 2B shows a state in which the gravel G, the sand S, and the cement C are layered. In addition, in order to finish supplying the measured amount of gravel, sand and cement to the material input chute 1 at the same time,
After the last gravel of the gravel weighing machine 20 is supplied to the belt 11, the electromagnetic feeder 24a provided below the opening / closing gate 23a is controlled so that the supply of the sand from the sand weighing machine 20a ends after L1 / V time. Controls the supply amount from the sand meter 20a. Similarly, the supply amount of cement is controlled. Thereby, the supply of the metered gravel, sand and cement to the material input chute 1 ends at the same time.

According to the present embodiment, as shown in FIG. 2C, a watering nozzle or a nozzle is provided near the outer peripheral wall of the opening at the lower end of the material input chute 1, for example, over about a half circumference. A slit 7 is provided. These nozzles or slits 7 are connected to a water input pipe 39. An exhaust pipe 3 communicating with the dust collector is mounted above the material charging chute 1. Further, as shown in FIG. 1, a soundproof wall 4 is provided so as to surround the concrete mixer truck CV. A stirring blade 5 for stirring and mixing gravel, sand and cement as needed,
5, ... can also be provided.

Next, an example of manufacturing concrete according to the first embodiment will be described. Gravel and sand storage bins 25,2
Gravel and sand are respectively stored in 5a as is well known in the art. Then, the gravel and sand are weighed by the gravel and sand weighing machines 20 and 20a, respectively. Also measure the cement. Further, the admixture is measured by the admixture measuring device 32, and the total of the measured admixture and water is measured by the water measuring device 30 and stored in the temporary water storage tank 31. Then, the belt conveyor 10 is started. Gravel from the gravel measuring machine 20,
Sand from the sand weighing machine 20a and the cement weighing machine 20
b. cement from the electromagnetic vibration feeders 24, 24a,
The toner is uniformly supplied onto the belt 11 via the belt 24b. At this time, the running speed of the belt 11, the supply start time from the sand meter 20a and the cement meter 20b, the supply end time,
The supply amount and the like are controlled as described above. This allows
Gravel is formed on the lowermost layer of the belt 11, sand is formed thereon, and cement is layered on the sand in a layered manner. The material is supplied to the drum of the concrete mixer truck CV via the material charging chute 1. At this time, the stirring blades 5, 5,... Are rotationally driven as necessary. Further, the air in the material input chute 1 is exhausted to the dust collector by the exhaust pipe 3. Thereby, a favorable environment is maintained in combination with the effect of the soundproof wall 4.

The water and the admixture in the temporary water storage tank 31 are also supplied to the concrete mixer truck at the flow rate controlled by the flow rate control valve 40 from the watering nozzle or slit 7 provided on the outer peripheral wall near the opening of the chute 1. It is thrown into the drum of the CV. That is, the kneading water mixed with the admixture is supplied to the drum of the concrete mixer truck CV at the same time as the concrete material or after a short time. In this way, the concrete raw material becomes concrete mixer truck C
After being supplied to the V drum, the operation is switched to a high speed for a predetermined time, and the concrete production is completed. After kneading, return to the prescribed low speed, and concrete mixer car CV
Is operated to the casting site. Hereinafter, concrete is manufactured in the same manner.

The first embodiment can be variously modified. For example, in the above-described embodiment, a layer is formed in the order of gravel, sand, and cement and supplied to the material input chute 1. However, in the order of sand, gravel, and cement, or cement is mixed with gravel and sand. It is also evident that it can be supplied in layers between sand or gravel. Further, it is also apparent that powder admixtures such as fly ash, blast furnace slag fine powder, stone powder, etc. can be charged into the material charging chute 1 in the same manner as cement or mixed with cement.

In the above embodiment, the material input chute 1
Is applied, but can also be carried out with the material storage hopper 1 'instead of the chute. The embodiment is shown in FIG. According to the present embodiment, gates 2, 2 that are opened and closed by air cylinders 6, 6 are provided at the opening of the material storage hopper 1 ′. Therefore, the concrete material conveyed by the belt conveyor 10 is temporarily stored in the material storage hopper 1 ', and is opened into the concrete mixer truck CV by opening the gates 2, 2. It is clear that concrete can be manufactured in substantially the same manner by the material storage hopper 1 '.

Next, a second embodiment of the present invention will be described with reference to FIG. Although the same components as those of the first embodiment are denoted by the same reference numerals and will not be described repeatedly, according to the present embodiment, the material charging chute 1 is provided around the material charging chute 1. A gravel weighing machine 20, a cement weighing machine 20b, and a sand weighing machine 20a are arranged at substantially the same distance as 1. Electromagnetic vibration feeders 24, 24a and 24b are provided below the weighing machines 20, 20a and 20b, respectively. In the present embodiment, the electromagnetic vibration feeders 24, 24a,
At the downstream end of 24b, there are provided belt conveyors 24 ', 24a' and 24b 'which communicate with the material charging chute 1.
The respective supply amounts from the gravel weighing machine 20, the cement weighing machine 20b, and the sand weighing machine 20a are measured gravel,
The electromagnetic vibratory feeders 24, 24 are supplied so that the cement and the sand are supplied almost at the same time and are supplied almost simultaneously.
The flow rates of a and 24b are controlled. As a result, the concrete material is injected into the concrete mixer CV via the material input chute 1 in a state where the concrete material is mixed at the same ratio, and the kneading in the concrete mixer CV becomes easy. Further, the water and the admixture in the temporary water storage tank 31 are also charged into the drum of the concrete mixer truck CV through the nozzle or the slit 7 at a flow rate controlled by the flow rate control valve 40. It is apparent that concrete can be manufactured also in the present embodiment in substantially the same manner as in the first embodiment.

This embodiment can also be implemented by a material storage hopper 1 'instead of the material charging chute 1. An example is shown in FIG. It is clear that concrete can be manufactured in substantially the same manner as the embodiment shown in FIG. In the second embodiment, the belt conveyors 24 ', 24a', 24b 'are interposed at the discharge ends of the electromagnetic vibration feeders 24, 24a, 24b, but the material is directly transferred by the electromagnetic vibration feeders 24, 24a, 24b. Input feeder 1 or material storage hopper 1 '
It is clear that it can be supplied to

[0022]

As described above, according to the present invention, a single common conveyor such as a belt conveyor is used, and materials such as gravel, sand, cement, etc., which have been measured, are respectively weighed on the single conveyor. When discharging from the machine, on the transport device surface,
Control the amount of discharge from the weighing machine and the discharge start and end time so that these materials are strip-shaped laminated cross sections according to the respective mixing ratios, and the cement is the top layer or the middle layer of gravel and sand aggregate. Then, the material dispersed and laminated in a thin strip shape is directly put into a concrete mixer car,
According to another invention, a conveyor such as a belt conveyor is provided at the lower part of a measuring machine for concrete material such as gravel, sand, cement, etc., and these materials are substantially simultaneously or slightly contaminated through these conveyors. The amount and time of discharge from each weighing machine are controlled so that they are put into the concrete mixer truck at almost the same time with a delay, and each material is thinly dispersed almost according to the blending ratio and the concrete mixer truck is used. Because it is thrown, gravel,
Cement enters between the sands, and premixing or auxiliary kneading of concrete materials composed of gravel, sand, and cement having different specific gravities and particle sizes are performed. As a result, an effect peculiar to the present invention that concrete of a predetermined quality can be obtained with a concrete mixer truck even without a mixer for concrete kneading can be obtained. In addition, since the cement is in the uppermost layer or the intermediate layer, it is possible to prevent the hygroscopic cement from adhering to the transfer device. Moreover,
Since there is no mixer for concrete kneading, the whole concrete manufacturing equipment can be constructed at low cost and low cost, and the maintenance and inspection cost is low.
By providing a system that can centrally manage aggregate management, weighing management, shipping management, etc., in unmanned operation, for example, the driver of a concrete mixer car simply pushes the push button of the concrete production device and puts the raw material into the concrete mixer vehicle Can also produce concrete. According to still another invention, kneading water and an admixture are injected into a concrete mixer truck from a nozzle or a slit provided around a lower outer wall of a material charging chute or a material storage hopper through a pipe provided with a flow rate control valve. Therefore, in addition to the above effects, the effects of promoting the dispersion of the kneading water into the aggregate and the cement material and the like and preventing the cement from adhering to the inner peripheral wall of the material input chute or the material storage hopper can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing a concrete manufacturing apparatus according to a first embodiment of the present invention.

FIG. 2 is a view schematically showing details of the concrete manufacturing apparatus shown in FIG. 1, wherein (a) is a front view showing the entirety, (b) is a cross-sectional view of a belt conveyor portion, and (c) is a material. FIG. 2 is a front view showing a part of the charging chute, and FIG. 2D is a front view of a material storage hopper.

FIG. 3 is a view schematically showing a concrete manufacturing apparatus according to a second embodiment of the present invention, in which (a) is a front view showing the entirety, and (b) is a front view of a material storage hopper. .

FIG. 4 is a front view schematically showing an example of a conventional concrete manufacturing plant.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Material input hopper 1 'Material storage hopper 10 Belt conveyor 20 Gravel weighing machine 20a Sand weighing machine 20c Cement weighing machine 24, 24a, 24b Electromagnetic vibration feeder CV Concrete mixer truck

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[Procedure amendment]

[Submission date] October 8, 1999 (1999.10.
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to directly meter a concrete material such as gravel, sand, cement, water and an admixture into a concrete mixer truck, and to carry out the concrete mixer truck at a high speed for a predetermined time. This is achieved by rotating the drum. However, as described above, the concrete mixer truck is not dedicated to concrete kneading, and thus a method of supplying concrete raw materials to the concrete mixer truck has been devised. That is, in order to achieve the above object, the present invention does not provide a concrete mixer for stationary mixing, but directly weighs concrete raw material composed of gravel, sand, cement, water, an admixture and the like to a concrete mixer truck. Is a method of manufacturing the required concrete by periodically supplying and supplying, using a single common conveyor such as a belt conveyor, the measured gravel, sand,
When discharging materials such as cement from each weighing machine,
On the conveyor surface, these materials are discharged from the weighing machine so that they have a strip-shaped laminar cross section according to their respective mixing ratios, and the cement is the top layer or the middle layer of gravel and sand aggregate. Control the start and end time, this band
The is the product layer dispersed material with charged into a concrete mixer truck directly, the metered kneading water and admixtures were charged directly to a concrete mixer truck via a pipe having a flow rate adjustable valve, each raw material charging After that, the drum of the concrete mixer truck is switched to high-speed rotation for a predetermined period of time and then driven to obtain the required concrete. According to the second aspect of the present invention, a concrete raw material composed of measured gravel, sand, cement, water, an admixture, etc. is directly charged and supplied to a concrete mixer vehicle without installing a fixed concrete kneading mixer. A method for producing required concrete by means of a concrete material measuring machine such as gravel, sand, cement, etc., provided with a conveyor means such as a belt conveyor below each of the measuring machines, and these materials are substantially conveyed through these conveying means. At the same time, or with a slight delay of the cement, the amount and time of discharge from each weighing machine are controlled so that each of them is put into the concrete mixer car at almost the same time, and each material is dispersed at almost the same mixing ratio. At the same time as it is put into the concrete mixer truck, the measured kneading water and admixture are directly cooled through a pipe equipped with a flow rate adjustable valve. It was put into the cleat mixer truck, driving drum of each material injection after a predetermined time the concrete mixer truck is switched to high-speed rotation, configured to obtain the required concrete. According to a third aspect of the present invention, a weighing object discharging means such as a vibration feeder capable of adjusting a flow rate is attached to a lower portion of each weighing machine for concrete material such as gravel, sand, cement, and the like, and the discharging of each weighing material discharging means is performed. Each weighing machine is arranged so that the ends are arranged in series, and a single common conveyor device such as a belt conveyor is provided below the discharge end of the weighed object unloading means, and the weighed items on the conveying device are already measured. In discharging materials such as gravel, sand, cement, etc. through respective weighing machines and weighing material discharging means, these materials have a band-shaped laminated cross section according to their respective mixing ratios on the transporting device surface, and the cement is the uppermost layer or gravel, so that an intermediate layer of aggregate sand, emissions and discharge start and end times from the weighing machine controlled by a metered evacuation means, material-feeding shoe the product layer is dispersed material in this strip And the metered mixing water and admixture are directly injected into the concrete mixer truck via piping equipped with a flow rate-adjustable valve, and the concrete mixer is charged for a predetermined time after each raw material has been charged. By switching the drum of the car to high-speed rotation and operating to obtain the required concrete, the stationary concrete kneading mixer is not mounted. According to a fourth aspect of the present invention, a weighing object carrying means such as a vibratory feeder capable of adjusting a flow rate is attached to a lower portion of each weighing machine for concrete material such as gravel, sand, cement, and the like. A conveying device such as a belt feeder is provided below the weighing object unloading means, and the weighing material discharging means,
Alternatively, each weighing machine is arranged so that the discharge end of the conveying device is arranged around the material input chute provided on the concrete mixer truck, and these weighed materials are substantially simultaneously or the cement is slightly delayed. In addition, each of them controls each discharge means so that they can be directly charged into the concrete mixer truck via the material charging chute at substantially the same time, and has a valve that can adjust the flow rate of the measured kneading water and admixture. The concrete mixer truck is put directly into the concrete mixer truck through the pipes, and the drum of the concrete mixer truck is switched to high-speed rotation for a predetermined time after each raw material is put into operation to obtain the required concrete, and the fixed concrete mixing mixer is installed. Not to be configured. According to a fifth aspect of the present invention, a material storage hopper is provided in place of the material charging chute according to the third or fourth aspect, and the material transported from the transport device is temporarily stored in the material storage hopper, and then the concrete mixer is used. According to a sixth aspect of the present invention, the metered kneading water and the admixture according to any one of the third to fifth aspects are supplied through a pipe having a flow control valve. The material such as gravel, sand, cement, etc. is dispersed and charged when injected into the concrete mixer vehicle by the nozzle or slit provided around the lower outer wall of the material input chute or material storage hopper, and the input flow rate and input The time is controlled by the flow control valve.

Claims (6)

[Claims] 1. A concrete concrete mixer comprising a concrete mixer consisting of gravel, sand, cement, water, an admixture, etc., is directly charged and supplied to a concrete mixer truck without installing a fixed concrete mixing mixer. Using a single common conveyor such as a belt conveyor, and discharging the weighed material such as gravel, sand, cement, etc. from each weighing machine onto the conveyor, On the conveyor surface, these materials are discharged from the weighing machine so that they have a strip-shaped laminar cross section according to their respective mixing ratios, and the cement is the top layer or the middle layer of gravel and sand aggregate. The start and end times are controlled, the material almost completely laminated and dispersed in a belt shape is directly poured into the concrete mixer truck, and the flow rate of the measured kneading water and admixture is adjusted. The concrete concrete car is put into a concrete mixer car directly through a pipe equipped with a functioning valve, and the concrete mixer is driven by switching the drum of the concrete mixer car to a high-speed rotation for a predetermined time after each raw material is supplied, to obtain a required concrete. Manufacturing method. 2. The required concrete material is directly supplied to a concrete mixer truck without a fixed concrete kneading mixer, and a concrete material composed of measured gravel, sand, cement, water, an admixture and the like is directly supplied to the concrete mixer truck. A method of manufacturing a concrete material, such as gravel, sand, cement, etc., provided with a conveyor means such as a belt conveyor at the lower part of the weighing machine, through these conveying means, these materials substantially simultaneously,
Alternatively, the amount of discharge from each weighing machine and the discharge time are controlled so that the cement is slightly delayed, and each of them is put into the concrete mixer truck at almost the same time, and the respective materials are dispersed at almost the same blending ratio and concrete is mixed. At the same time as being charged into the mixer truck, the measured kneading water and admixture are directly charged into the concrete mixer truck via a pipe equipped with a valve capable of adjusting the flow rate, and the drum of the concrete mixer truck is charged for a predetermined time after each raw material has been charged. A method for producing concrete, comprising switching to high-speed rotation and operating to obtain required concrete. 3. A weighing object discharge means such as a vibratory feeder capable of adjusting a flow rate is attached to a lower portion of each weighing machine for concrete material such as gravel, sand, cement, etc., and a discharge end of each weighing material discharge means is connected in series. Along with arranging the respective weighing machines so as to be arranged, a single common conveyor such as a belt conveyor is provided below the discharge end of the weighed object discharging means, and weighed gravel, sand, When discharging materials such as cement through respective weighing machines and weighing material discharging means, these materials have a band-shaped laminated cross section according to their respective mixing ratios on the surface of the transport device, and the cement is the uppermost layer or the gravel or sand. The discharge amount from the weighing machine and the discharge start and end times are controlled by the weighing material discharging means so as to form an intermediate layer of the aggregate, and the material almost completely laminated and dispersed in the belt shape is supplied to the material input shoe. And the metered mixing water and admixture are directly injected into the concrete mixer truck through piping equipped with a valve capable of adjusting the flow rate, and the concrete mixer truck is charged for a predetermined time after each raw material has been charged. A concrete production apparatus characterized in that a stationary concrete kneading mixer is not mounted by operating the drum by switching to high-speed rotation to obtain required concrete. 4. A weighing object discharging means such as a vibration feeder capable of adjusting a flow rate is attached to a lower portion of each weighing machine for concrete material such as gravel, sand, cement, and the like, and further, each of these weighing material discharging means as required. A transfer device such as a belt feeder is provided at the lower part of the weighing machine, and each weighing machine is arranged such that a discharge end of the weighed material discharging means or the discharge end of the transfer device is disposed around a material input chute provided on a concrete mixer truck. The respective material discharge means are controlled so that these weighed materials are charged into the concrete mixer truck directly through the material charging chutes substantially simultaneously, or with the cement being slightly delayed, and at substantially the same time. With
The measured kneading water and admixture are directly injected into the concrete mixer truck through a pipe equipped with a valve that can adjust the flow rate. A concrete manufacturing apparatus characterized in that a fixed concrete mixing mixer is not mounted by obtaining concrete. 5. A material storage hopper is provided in place of the material charging chute according to claim 3 and the material transported from the transport device is temporarily stored in the material storage hopper and then charged into a concrete mixer truck. A concrete manufacturing apparatus characterized by the above-mentioned. 6. The metered kneading water and admixture according to any one of claims 3 to 5, wherein the metered kneading water and the admixture are supplied to a material input chute or a lower outer wall of a material storage hopper through a pipe having a flow rate control valve. With the nozzle or slit provided around, the material such as gravel, sand, cement and the like is dispersed and charged when it is charged into the concrete mixer car, and the charging flow rate and charging time are controlled by the flow rate control valve. And concrete manufacturing equipment.