JP6550430B2 - Concrete mixing unit - Google Patents

Description

  The present invention can produce concrete by mixing and mixing concrete materials such as cement, aggregate, and water at the construction site when performing casting work (operation of pouring concrete into a mold) at the construction site. In particular, the present invention relates to an on-site kneading and manufacturing unit suitable for repair work and repair work of an existing structure.

  At present, ready-mixed concrete (so-called fresh concrete: fresh concrete) is used in many constructions. Since ready-mixed concrete is manufactured in large quantities based on certain standards at a well-maintained factory, concrete of stable quality is obtained, and its quality is also guaranteed at shipment.

  In the standard, the transport time of ready-mixed concrete is limited within a certain time because ready-mixed concrete changes its quality over time. Therefore, in order to stably obtain high-quality concrete using green concrete, there is a disadvantage that the process from production to transportation and placing must be performed in a limited time. In that respect, on-site mixing, in which concrete material and water are mixed at the construction site, has the advantage of not being subject to transportation time limitations.

  In the repair work and repair work of existing structures and infrastructure in the city, such as office buildings, roads, and tracks, work hours are often limited at night etc. In addition, sites where mixer cars can not enter themselves are also available. is there. In addition, there are many places where use of ready-to-use computer is difficult such as indoor and the roof. At such sites, the required amount of concrete is small compared to the new construction work, so site mixing is often performed.

  At such sites, workers often manually weigh each concrete material and water, and repeatedly mix and mix it using a small mixer. Therefore, the work load on the workers is large and the quality of the concrete tends to vary.

  Moreover, in the case of repair work, unlike in the case of new construction work, it is necessary to adjust the type and amount of water of the concrete material to be used in accordance with the existing structure. Therefore, management of manufacturing conditions is complicated, and there is also a drawback that there is a high risk of occurrence of weighing errors and the like.

  Therefore, in order to solve these problems, the present inventors have previously proposed an on-site concrete mixing and production unit of concrete suitable for small-scale placing work such as repair work (Patent Document 1).

  The on-site mixing and manufacturing unit is a batch type manufacturing device, and is configured by integrally integrating related devices such as a mixer, a main hopper, a sub hopper, a belt conveyor, a screw feeder, a water supply device, and a control device on a unit base. It is done. This on-site mixing and production unit is designed in a size that can be loaded and transported on a 2 t car.

  A coarse aggregate pack, which has been adjusted to a specific quality in advance, is loaded into the main hopper, and a predetermined amount thereof is loaded into the mixer by the belt conveyor. A mortar pack, which has been adjusted to a specific quality in advance, is introduced into the sub hopper, and a predetermined amount is introduced into the mixer by a screw feeder. After a predetermined amount of water is supplied by the water supply device, concrete is manufactured by operation of the mixer.

JP, 2016-159474, A

  Generally, materials of concrete are roughly classified into three types of cement, sand (fine aggregate) and gravel (coarse aggregate) from the difference in properties. These materials can be obtained inexpensively and can be secured and procured relatively easily. In particular, sand and gravel may be easily procured on site.

  However, in the case of the on-site kneading and production unit disclosed in Patent Document 1, a predetermined premix product (coarse aggregate pack or mortar pack) is mainly used as a material of concrete, so the material cost becomes high, securing or procuring materials There were challenges such as

  In addition, since only the main hopper and the sub hopper corresponding to these materials are disposed on the small-sized unit base, the on-site kneading and manufacturing unit disclosed in that embodiment needs to manually feed one material, etc. For example, there has been a problem that concrete can not be produced using the three materials described above. In addition, there are many requests for more concrete that can be produced at one time.

  Therefore, an object of the present invention is to provide an on-site concrete mixing and manufacturing unit which can use general concrete materials and is more convenient.

  The technology disclosed herein relates to a concrete mixing and production unit of concrete in which a plurality of related devices are integrally incorporated on a unit base.

The related apparatus includes: a mixer capable of measuring a weight change by a load cell ; a first main hopper having a lower portion of a shape which receives a first concrete material, has an outlet at its lower end, and is downwardly tapered. A second main hopper having a second concrete material and having a lower end having an opening at a lower end and having a shape which is downwardly tapered; a sub-hopper receiving a third concrete material; and the first concrete material A second belt conveyor for transporting the second concrete material and loading it into the mixer, and a screw for transporting the third concrete material and loading it into the mixer A feeder, a water supply apparatus for supplying water to the mixer, and a measured value of the load cell are stored. And a control device having a production condition storage unit.

The mixer is disposed at one end of the unit pedestal in the longitudinal direction and the sub-hopper is disposed at the other end of the unit pedestal in the longitudinal direction of the unit pedestal in a state where the dimensions are enlarged in the short direction of the unit pedestal The first main hopper and the second main hopper are disposed in parallel in the short direction of the unit base between the sub hopper and the mixer.

Then, the first belt conveyor and the second conveyor belt, extending in a state separated from each other from below the outlet of the discharge port of the lower and the second main hopper of the first main hopper to the top of the mixer The screw feeder passes through the gap between the lower portion of the first main hopper and the lower portion of the second main hopper from below the sub-hopper, and the screw between toward the mixer is extended with inclined upward, we put the third concrete material toward the center of the top of the mixer.

  That is, according to this on-site kneading and production unit, the related apparatus for producing concrete, such as a mixer, is integrally incorporated on the unit base, so only by transporting and installing the on-site kneading and production unit to the construction site Easy to do on-site mixing.

  And since the mixer with a measurement function is installed in this on-site kneading production unit, it is possible to measure the concrete material and water to be introduced into the mixer. As a result, the mixing ratio is stabilized, and high quality concrete can be manufactured.

  Furthermore, since these measured values are stored, the mixing ratio of the concrete material used for the manufactured concrete can be specified as needed after the manufacture. That is, even if it is on-site kneaded concrete, quality assurance can be performed.

  Moreover, since there are provided three means for injecting concrete material comprising the first main hopper, the second main hopper, and the sub hopper, cement, fine aggregate, which is a general material used for producing concrete, is provided. And coarse aggregate can be used. Therefore, it is excellent in convenience and versatility.

  Furthermore, by arranging these related devices efficiently and functionally, it is possible to significantly increase the production capacity while suppressing the size increase.

  That is, a mixer is disposed at one longitudinal end of the unit pedestal, a sub-hopper is disposed at the other longitudinal end of the unit pedestal, and the first main hopper is disposed between the sub-hopper and the mixer The second main hoppers are arranged in parallel in the short direction of the unit base.

  As a result, there is no associated equipment that requires a large installation space around the mixer, and the mixer can expand its diameter to the limit of the lateral dimension of the unit table, thus increasing the capacity. By arranging the first main hopper and the second main hopper in parallel in the short direction of the unit base, the capacities of these hoppers can also be increased to the limit without waste.

  And since the 1st belt conveyor and the 2nd belt conveyor are installed toward the mixer in the state where it separated mutually from the lower part of the 1st main hopper and the lower part of the 2nd main hopper, the 1st belt conveyor and the 2nd The belt conveyor can be minimized in size and can be efficiently arranged in a narrow space.

  A screw feeder is extended from the lower side of the sub hopper through the gap between the lower portion of the first main hopper and the lower portion of the second main hopper to the mixer between the first belt conveyor and the second belt conveyor. Therefore, screw feeders can also be minimized in size and can be efficiently arranged in a narrow space.

  The screw feeder conveys the third concrete material of small particle size and feeds it into the mixer. Since the input position can be located on the center side of the mixer, the third concrete material can be effectively prevented from diffusing around, and can be stably introduced into the interior of the mixer.

  In particular, the sub-hoppers may be disposed adjacent to the first main hopper and the second main hopper in a state of being disposed at an intermediate portion in the lateral direction of the unit base.

  Then, more efficient and functional arrangements can be made, and the production capacity can be improved in a compact size.

  The inlet opening at the top of the sub hopper may be located below the inlet at the top of each of the first main hopper and the second main hopper.

  In this case, for example, when the first concrete material or the second concrete material is externally supplied to the first main hopper or the second main hopper using the belt conveyor from the outside, the belt conveyor can be prevented from coming into contact with the sub hopper .

  The mixer is provided with a fibrous material insertion portion for receiving a fibrous material as a fourth concrete material, and the fibrous material insertion portion is attached to a mesh-like sifter attached to a part of the opening of the mixer; It may be made to have a vibrator attached.

  Then, high quality fiber reinforced concrete can be easily manufactured.

  The related device has a rectangular floor surface including a short side of more than 1.5 m and 2 m or less and a long side of more than 3 m and 4 m or less, and the related device is accommodated on the floor surface Preferably, the total weight of the on-site kneading and production unit is set to 4000 kg or less.

  Then, it can be loaded and carried on a medium-sized truck bed or freight car, and can be easily put on and off. Therefore, it is suitable for small scale placing work such as repair work.

  According to the disclosed on-site kneading and production unit, it can be easily transported and easily on-site kneaded, high-quality concrete can be produced using general concrete materials, and quality assurance can also be performed.

It is a schematic plan view of a field kneading production unit. It is a schematic side view of a field kneading production unit. It is a schematic longitudinal cross-sectional view which shows the sub hopper of a field kneading production unit, and the part of a screw feeder. It is the schematic which shows one end surface side of a field kneading manufacturing unit. It is a schematic perspective view which shows an example of the usage form of a field kneading manufacturing unit. It is a block diagram showing the main composition of a control device. It is the schematic which shows a fibrous raw material injection | throwing-in part. It is a schematic sectional drawing in the II line in FIG. 7A.

  Hereinafter, embodiments of the present invention will be described in detail based on the drawings. However, the following description is merely illustrative in nature, and does not limit the present invention, its application, or its application.

<Field kneading production unit>
1 and 2 show an example of the on-site kneading and manufacturing unit 1 (also referred to simply as the manufacturing unit 1). The production unit 1 is a batch-type production apparatus having a production volume of concrete of about 100 to 400 liters.

  That is, this production unit 1 has a plurality of related devices necessary for on-site kneading on one compact unit stand 10 in a more efficient and functional state than the on-site kneading and production unit of Patent Document 1 , Is integrally incorporated. Thus, while maintaining the compact size of this production unit 1 in the same manner as the on-site kneading production unit of Patent Document 1, a production capacity about twice that of the on-site kneading production unit of Patent Document 1 can be obtained. There is.

  Specifically, the unit stand 10 is configured of a rectangular floor surface 11, a support frame 12, and the like. The length W of the short side of the floor 11 is greater than 1.5 m and 2 m or less, and the length of the long side L is greater than 3 m and 4 m or less. The support frame 12 includes a lower frame installed along the edge of the floor surface 11, a rectangular upper frame disposed opposite to the upper side of the lower frame, and a plurality of bridges installed between the lower frame and the upper frame. It consists of a support frame and the like.

  The related devices are the mixer 20, the first main hopper 30A, the second main hopper 30B, the sub hopper 31, the first belt conveyor 40A, the second belt conveyor 40B, the screw feeder 50, the water supply device 60, the controller 70 and the like.

  These related devices are integrated on the unit stand 10 so as to fit on the floor 11 and not to protrude outside the floor 11, and the height H from the floor 11 is also 2.5 m. For example, it is installed in 2 m or more and 2.5 m or less so as not to exceed. The total weight of the manufacturing unit 1 is set to be 4000 kg or less.

  As a result, the manufacturing unit 1 can be loaded and transported on a carrier (a so-called medium-sized truck etc.) or a freight car having a so-called maximum loading capacity of 4 t and can be easily carried on and off.

(mixer)
The mixer 20 is disposed at one short side of the unit base 10 in the longitudinal direction. As the mixer 20, a pan-type mixer having an outer diameter of about 1.5 m and a capacity of about 350 L is used. A grout mixer may be used instead of the pan type depending on the material used as the main component.

  The mixer 20 is composed of a kneading section 21 and a drive section 22 connected to the lower part thereof. The kneading portion 21 includes a cylindrical bottomed cylindrical kneading container 23, a disk-shaped upper lid 24 covering the upper portion of the kneading container 23, and stirring blades 25 installed inside the kneading container 23. , And an outlet 26 which can be opened and closed. A motor 27 is installed inside the drive unit 22, and a stirring blade 25 is attached to the rotation shaft of the motor 27 that protrudes into the kneading container 23.

  The upper lid 24 is configured of a relatively large first lid 24 a and a relatively small second lid 24 b. The first lid 24a and the second lid 24b are connected so as to be able to swing and open and close each other. A dust collector 28 is attached to the mixer 20. The dust collector 28 captures dust generated inside the kneading container 23 at the time of kneading, and suppresses the diffusion of dust to the outside.

  In the mixer 20, a load cell 80 is also installed. That is, the mixer 20 is supported by the unit base 10 via the load cell 80. The load cell 80 is a sensor that converts a load into an electrical signal. The load cell 80 can measure the weight change of the mixer 20. The mixer 20 is further provided with a fibrous material feeding section 95, which will be described later separately.

(First main hopper, second main hopper)
Each of the first main hopper 30A and the second main hopper 30B is a large container for receiving each of the first concrete material and the second concrete material. Among concrete materials, sand (fine aggregate) and gravel (coarse aggregate), which usually have a high blending ratio, correspond to the material of the first concrete and the second concrete material. The 3rd concrete material mentioned below corresponds to cement and other additives which are powdery materials (in the following explanation, it is simply cement for convenience).

  In this production unit 1, sand is mainly used as the first concrete material to be input to the first main hopper 30A, and gravel is to be used as the material of the second concrete to be input to the second main hopper 30B. It has become.

  Each of the first main hopper 30A and the second main hopper 30B is a box-shaped container having a large inlet 30a at the top and a small outlet 30b at the bottom. The lower part of each of the first main hopper 30A and the second main hopper 30B is shaped to be narrowed downward, and the discharge port 30b is opened at the lower end thereof.

  The first main hopper 30A and the second main hopper 30B are disposed adjacent to the mixer 20 and at an intermediate portion in the longitudinal direction of the unit base 10 in parallel in the lateral direction of the unit base 10. In the present embodiment, the first main hopper 30A and the second main hopper 30B are formed to have the same shape and dimensions (the dimensions can be changed according to the specifications).

  The first main hopper 30A and the second main hopper 30B are disposed over the entire area in the short direction of the unit table 10 so as to be able to accommodate a relatively large amount of sand and gravel. Specifically, each of the first main hopper 30A and the second main hopper 30B is formed to have a rectangular top view, and the short side of the unit base 10 of each of the first main hopper 30A and the second main hopper 30B. The external dimension of the direction has a size that divides the short side of the unit base 10 into two.

  Each of the first main hopper 30A and the second main hopper 30B of the manufacturing unit 1 has an outer dimension of about 1 m in the longitudinal direction of the unit base 10. The capacity of each of the first main hopper 30A and the second main hopper 30B is set larger than the maximum amount of sand and gravel used for one production in the mixer 20.

  The first belt conveyor 40A is installed between the first main hopper 30A and the mixer 20 so as to convey the sand received by the first main hopper 30A and throw it into the mixer 20. Specifically, the end on the introduction side of the first belt conveyor 40A is installed below the discharge port 30b of the first main hopper 30A, and the end on the discharge side of the first belt conveyor 40A is on the top of the mixer 20. is set up. The middle portion of the first belt conveyor 40A is extended in an inclined state from the end on the introduction side toward the end on the discharge side. The end on the outlet side is inserted into the inside of the first introduction duct 43A which is in communication with the inside of the kneading container 23 through the notch of the first lid 24a.

  Similarly, the second belt conveyor 40B is installed between the second main hopper 30B and the mixer 20 so as to convey the gravel received by the second main hopper 30B and throw it into the mixer 20. Specifically, the end on the introduction side of the second belt conveyor 40B is installed below the discharge port 30b of the second main hopper 30B, and the end on the discharge side of the second belt conveyor 40B is on the top of the mixer 20. is set up. The middle portion of the second belt conveyor 40B extends from the end on the introduction side toward the end on the discharge side in parallel with each other with the middle portion of the first belt conveyor 40A. The end on the lead-out side is inserted into the inside of the second introduction duct 43B communicated with the inside of the kneading container 23 through the notch of the first lid 24a.

(Sub hopper)
The sub hopper 31 is a small-sized container for receiving cement corresponding to the third concrete material. Since the blending ratio of cement is smaller than sand and gravel, the sub hopper 31 is set to have a smaller capacity than the first main hopper 30A and the second main hopper 30B.

  The sub-hopper 31 is a box-shaped container having an inlet 31a at its upper part and a small outlet 31b at its lower part. The lower portion of the sub hopper 31 is shaped to be narrowed downward, and the discharge port 31 b is opened at the lower end thereof. The capacity of the sub hopper 31 is set to be larger than the maximum amount of cement used for one production in the mixer 20.

  The sub hopper 31 is disposed at the other short side in the longitudinal direction of the unit base 10. Specifically, the sub hopper 31 is disposed adjacent to the first main hopper 30A and the second main hopper 30B in a state of being disposed at an intermediate portion in the lateral direction of the unit base 10, and is disposed laterally of them. There is. Thereby, related devices occupying a relatively large capacity are efficiently and functionally arranged in the unit base 10 where the installation space is limited.

  That is, the screw feeder 50 is installed between the sub-hopper 31 and the mixer 20 so as to convey the cement received by the sub-hopper 31 and introduce the cement into the mixer 20. By arranging the sub hopper 31 in the above-described manner, the screw feeder 50 can be efficiently arranged.

  Specifically, as shown in FIG. 3, the end on the introduction side of the screw feeder 50 is disposed below the discharge port 31 b of the sub-hopper 31, and the end on the discharge side of the screw feeder 50 on the top of the mixer 20. Is installed. The middle portion of the screw feeder 50 passes through a gap S between the lower portion of the first main hopper 30A and the lower portion of the second main hopper 30B, as shown in FIG. 4, and the first belt conveyor 40A and the second belt conveyor 40B. Extending upward toward the mixer 20.

  By passing the gap S between the lower portion of the first main hopper 30A and the lower portion of the second main hopper 30B, the inclination of the screw feeder 50 can be avoided from becoming large, and installation of related devices below the unit base 10 Space can be secured. By passing between the first belt conveyor 40A and the second belt conveyor 40B, they can be efficiently arranged in the short direction of the unit stand 10, and both sides of the first belt conveyor 40A and the second belt conveyor 40B work. Space can be secured.

  On both sides of the sub-hopper 31, a walkway 13 having a raised scaffold 13a is installed to facilitate the operation of each of the first main hopper 30A and the second main hopper 30B.

  The end on the lead-out side of the screw feeder 50 is connected to a third introduction duct 53 communicating with the inside of the kneading container 23 through the notch of the first lid 24a. The third introduction duct 53 is located between the first introduction duct 43A and the second introduction duct 43B, and is located closer to the center of the mixer 20 than these. From the first introduction duct 43A and the second introduction duct 43B, sand or gravel having a large particle size is introduced into the mixer 20, and from the third introduction duct 53, a cement having a small particle size is introduced into the mixer 20.

  By injecting powdery cement having a small particle size to the center side of the mixer 20, diffusion of cement to the periphery of the mixer 20 can be effectively suppressed, and can be stably injected into the mixer 20.

  The inlet 31a of the sub hopper 31 is located below the inlets 30a of the first main hopper 30A and the second main hopper 30B.

  As shown in FIG. 5, sand and gravel may be introduced into the inlets 30a of the first main hopper 30A and the second main hopper 30B using the belt conveyor BE. For example, at a site where sand and gravel can be procured locally, sand and gravel can be piled up in the field, and if necessary, it can be put into these inlets 30a using a belt conveyor BE to facilitate work.

  At this time, if the inlet 31a of the sub hopper 31 is located below the inlets 30a of the first main hopper 30A and the second main hopper 30B, the belt conveyor BE is brought into contact with the sub hopper 31. It can be installed easily.

  The water supply device 60 includes a water supply pipe 61, an electromagnetic on-off valve 62, a flow meter 63, a buffer tank 64, and the like. The downstream end of the water supply pipe 61 enters the inside of the kneading vessel 23. Although not illustrated, the upstream end of the water supply pipe 61 is connected to a water supply facility including a water storage tank, a pump, and the like, and a water supply source such as a pipe for industrial water.

  In the vicinity of the mixer 20, a temperature sensor 90 is disposed to measure the temperature of the surroundings. Further, in the manufacturing unit 1, the first surface moisture measuring device 91 is disposed in the first introduction duct 43A, and the second surface moisture measuring device 92 is disposed in the second introduction duct 43B. The first surface moisture measuring device 91 and the second surface moisture measuring device 92 measure the surface moisture of sand and gravel supplied to the mixer 20. The temperature sensor 90, the first surface moisture measuring device 91, and the second surface moisture measuring device 92 output the measured values to the control device 70.

  The control device 70 has a control panel 70 a installed on the upper part of the support frame 12 and a control panel 70 b installed on the floor surface 11. The control panel 70b is electrically connected to the control panel 70a, and is disposed in the space below the second main hopper 30B. The control device 70 is configured by a computer, various software installed in the computer, and the like, and executes control to mechanically manufacture concrete. Further, the control device 70, like the field kneading and manufacturing unit of Patent Document 1, has a function of storing manufacturing conditions for each batch and data communication with a computer system in order to guarantee the quality of concrete to be manufactured. The ability to perform

  The control device 70 further includes a monitor capable of displaying manufacturing conditions and the like, an input device capable of inputting instruction data and identification data SD, and an output device capable of printing manufacturing conditions and the like. For example, the control panel 70b is provided with a main computer or the like serving as the main body of the control device 70, and the control panel 70a is provided with a monitor, an input device, an output device, etc. frequently operated by the operator. .

  Although the control panel 70b needs to be disposed below either the first main hopper 30A or the second main hopper 30B for the sake of space, in this manufacturing unit 1, the second main hopper 30B It is located below. Under the first main hopper 30A into which sand is charged, gravel is thrown in, while spilled sand and dust may adhere to the control board 70b and become dirty or enter the interior and break down. Since there is almost no such risk if it is below the second main hopper 30B, it is possible to suppress contamination, failure, etc. of the control board 70b.

  The main configuration of the control device 70 is shown in FIG. The control device 70 includes a manufacturing control unit 71, a manufacturing condition storage unit 72, a weighing control unit 73, a data communication unit 74, and the like. The metering control unit 73 of the manufacturing unit 1 is provided with a water supply amount correction unit 75.

  The production control unit 71 controls the first belt conveyor 40A, the second belt conveyor 40B, the screw feeder 50, the mixer 20, and the electromagnetic on-off valve 62, and produces the operation timing, the water supply timing, the operation time of the mixer 20, etc. Perform related control.

  The manufacturing condition storage unit 72 measures the measurement value of the load cell 80 that changes with the operation of the first belt conveyor 40A, the measurement value of the load cell 80 that changes with the operation of the second belt conveyor 40B, and the screw feeder Each of the measured value of the load cell 80 and the amount of water supplied which changes with the operation of 50 are stored. In the manufacturing condition storage unit 72 of the manufacturing unit 1, the measurement value and the amount of water supplied to the load cell 80 can be stored in association with the identification data.

  The measurement control unit 73 executes control regarding measurement of concrete material and water. Specifically, the amount of cement, sand, and gravel input and water supplied to the mixer 20 is controlled based on the instruction data. The instruction data is data for instructing the control device 70 to produce concrete, including production conditions such as the mixing ratio.

  In this production unit 1, in particular, the input amount and the water supply amount of the concrete material to the mixer 20 can be controlled based on the identification data input for each production process.

  The data communication unit 74 has a function of transmitting and receiving data to and from the external computer system 100. The water supply amount correction unit 75 executes control to correct the water supply amount based on the measurement values of the temperature sensor 90, the first surface water content measuring device 91, and the second surface water content measuring device 92.

<Example of use of on-site kneading production unit>
The manufacturing unit 1 is installed at a construction site by being carried on a loading platform such as a medium-sized truck and the like. Thereafter, work of on-site mixing is performed using the manufacturing unit 1.

  In on-site kneading, the production unit 1 is operated to mechanically produce concrete. Specifically, a worker operates the manufacturing unit 1 to introduce a certain amount of concrete material and water into the mixer 20 and mix it for a certain period of time to produce concrete.

  There are multiple manufacturing patterns. For example, in this production unit 1, high quality concrete is produced using a coarse aggregate pack or mortar pack adjusted to a specific quality in advance as a concrete material, like the field kneading production unit of Patent Document 1 Can be used (first use example).

  In addition, in this production unit 1, cement, sand and gravel that are generally used can be used as a concrete material to produce a somewhat high-quality concrete (second use example).

(First usage example)
The operator takes out the crushed stone from the coarse aggregate pack and puts an appropriate amount into the first main hopper 30A or the second main hopper 30B (hereinafter referred to as the first main hopper 30A), takes out the mixed material from the mortar pack, Load an appropriate amount into the hopper 31. By operating the control device 70, the instruction data is manually input to operate the manufacturing unit 1.

  Then, the manufacturing control unit 71 drives the first belt conveyor 40A, and the crushed stone is introduced into the mixer 20. Based on the measurement value of the load cell 80, the weighing control unit 73 weighs the crushed stone, and when one batch of crushed stone is charged, the manufacturing control unit 71 stops the first belt conveyor 40A.

  Subsequently, the manufacturing control unit 71 drives the screw feeder 50, and the mixed material is introduced into the mixer 20. Based on the measurement value of the load cell 80, the weighing control unit 73 weighs the mixed material to be charged, and when one batch of mixed material is charged, the manufacturing control unit 71 stops the screw feeder 50. In addition, the order of charging the crushed stone and the mixed material may be reversed.

  Subsequently, the manufacturing control unit 71 opens the solenoid on-off valve 62 to supply the mixer 20 with water. The metering control unit 73 measures the amount of water supplied based on the flow meter 63, and closes the electromagnetic on-off valve 62 when the amount corresponding to the concrete material input to the mixer 20 is supplied.

  Thereafter, the production control unit 71 operates the mixer 20 to produce concrete. The manufactured concrete is discharged from the outlet 26. The required amount of concrete is manufactured by repeating such an operation.

  Since the concrete material used contains almost no water, the water management can be easily performed, and concrete with a constant water content can be stably manufactured. Since the fine grained material is collectively measured by the screw feeder 50 with high measuring accuracy separately from the crushed stone having a large grain size, the blending ratio is also stable, and higher quality concrete can be manufactured.

  And since it manufactures mechanically, measuring in the manufacturing unit 1, an artificial mistake is excluded and it can manufacture stably, even if it is a small amount of on-site kneading.

  Furthermore, in this manufacturing unit 1, it is devised so that the influence on the quality by temperature may also be suppressed.

  That is, it is known that an appropriate water supply amount changes depending on the ambient temperature at the time of mixing. Therefore, water supply correction data capable of obtaining an optimum water supply amount according to the temperature is created by experiment or the like, and the water supply correction data is stored in advance in the control device 70. The water supply amount correction unit 75 automatically corrects the water supply amount based on the water supply correction data and the measurement value of the temperature sensor 90.

  Therefore, even if the ambient temperature at the time of mixing changes, appropriate water supply can be performed, so high quality concrete can be stably manufactured. Since the corrected measurement data is stored in the manufacturing condition storage unit 72, its quality can also be guaranteed.

(Second use example)
The operator inserts an appropriate amount of sand into the first main hopper 30A, and an appropriate amount of gravel into the second main hopper 30B. Further, an appropriate amount of cement is charged into the sub hopper 31. Sand, gravel and cement can be used in general products. It may be procured locally. The operator manually inputs instruction data by operating the control device 70 to operate the manufacturing unit 1.

  Then, the first belt conveyor 40A is driven by the manufacturing control unit 71, and sand is introduced into the mixer 20. Based on the measurement value of the load cell 80, the weighing control unit 73 measures the sand to be introduced, and when one batch of sand is introduced, the manufacturing control unit 71 stops the first belt conveyor 40A. At this time, the surface moisture of the sand is measured by the first surface moisture measuring device 91, and the measured value is output to the control device 70.

  Similarly, the second belt conveyor 40B is driven by the manufacturing control unit 71, and the gravel is introduced into the mixer 20. Based on the measurement value of the load cell 80, the weighing control unit 73 weighs the gravel to be charged, and when the gravel of one batch is charged, the production control unit 71 stops the second belt conveyor 40B. At this time, the surface moisture of the gravel is measured by the second surface moisture measuring device 92, and the measured value is output to the control device 70.

  Subsequently, the manufacturing control unit 71 drives the screw feeder 50, and cement is introduced into the mixer 20. Based on the measurement value of the load cell 80, the weighing control unit 73 measures the amount of cement input, and when one batch of cement is input, the production control unit 71 stops the screw feeder 50. The order of sand, gravel and cement can be set arbitrarily.

  Subsequently, the manufacturing control unit 71 opens the solenoid on-off valve 62 to supply the mixer 20 with water. The metering control unit 73 measures the amount of water supplied based on the flow meter 63, and closes the electromagnetic on-off valve 62 when the amount corresponding to the concrete material input to the mixer 20 is supplied.

  At this time, the water supply amount correction unit 75 automatically corrects the water supply amount based on the water supply correction data and the measurement value of the temperature sensor 90.

  In this second usage example, when sand or gravel that has been piled in the field is used, the sand or gravel may get wet, and the moisture of the sand or gravel may greatly vary.

  On the other hand, in this manufacturing unit 1, the water supply amount correction unit 75 is based on the measurement values of the surface moisture of sand and gravel inputted from each of the first surface moisture measuring device 91 and the second surface moisture measuring device 92, Correct the water supply amount. For example, when the water content of sand or gravel is large, the measurement control unit 73 reduces the amount of water supplied to that amount and supplies the mixer 20 with water.

  As a result, even if the water content of sand and gravel used varies widely, cement of relatively stable quality can be manufactured.

  Thereafter, the production control unit 71 operates the mixer 20 to produce concrete. The manufactured concrete is discharged from the outlet 26. The required amount of concrete is manufactured by repeating such an operation.

  Three types of commonly used concrete materials (cement, sand, gravel) can be used, so convenience is excellent. Since mechanical production is performed while weighing in the production unit 1, human error is eliminated, and stable production can be achieved even with a small amount of on-site kneading. Because it can produce a relatively large amount of concrete at one time despite its compact size, it has excellent productivity.

  In the production unit 1, production conditions are stored in batch units. Specifically, each time on-site mixing is performed, mixed material, crushed stone, cement, sand, gravel, water weighing data, date data of batch processing, operation time of mixer 20, ambient temperature, sand, etc. Data of manufacturing conditions including manufacturing data such as surface moisture of gravel are stored in the manufacturing condition storage unit 72.

  Therefore, since the data affecting the quality of the concrete is stored for each batch, the quality of the concrete can be guaranteed. The data of the stored manufacturing conditions may be transmitted from the manufacturing unit 1 to the outside. Then, the increase in the storage amount of the manufacturing condition storage unit 72 can be suppressed, and high quality assurance can be performed by accumulating data.

(Application example)
The production unit 1 is further configured to easily produce fiber reinforced concrete. Specifically, the kneading container 23 of the mixer 20 is provided with a fibrous material feeding portion 95 for receiving a fibrous material as the fourth concrete material.

  7A and 7B show the mixer 20 in a state in which the second lid 24b of the upper lid 24 is opened. By opening the second lid 24 b, an arc-shaped opening (fiber inlet 23 a) communicating with the inside of the mixer 20 is formed in the upper part of the kneading container 23. A fibrous material feeding section 95 is provided inside the kneading container 23 in accordance with the fiber feeding port 23a.

  The fibrous material loading unit 95 has an arc-shaped shifter 96 having a mesh-like sieve 96 a provided on the bottom, and a vibrator 97 attached to the shifter 96. An inner flange portion 23 b protruding outward in the radial direction is formed on an upper portion of the inner wall along the fiber feeding port 23 a of the kneading container 23. A supporting member 98 having a hooking portion 98a overhanging so as to face the inner flange portion 23b is attached in the vicinity of a connection portion of the first lid portion 24a with the second lid portion 24b.

  An outwardly protruding flange portion 96 b is provided on the upper outer periphery of the shifter 96. The shifter 96 is detachably mounted to the kneading container 23 by hooking the flange 96b to the hook 98a and the inner flange 23b. The vibrator 97 is configured to vibrate the whole of the shifter 96 continuously by turning on the switch.

  Fiber reinforced concrete, also called FRC, is manufactured by mixing short fibers such as synthetic resin and metal. When producing such fiber reinforced concrete, in this production unit 1, after a predetermined amount of sand, gravel and cement are introduced into the kneading container 23, the mixture of these concrete materials is driven by the driving of the stirring blade 25. Is kept stirred. In this state, the vibrator 97 is turned on and the shifter 96 vibrates, and a predetermined amount of fibrous material is introduced by the operator from the fiber insertion port 23a.

  By doing so, the fibrous material is mixed into the mixture of concrete materials in a finely dispersed state through the shifter 96. Then, fiber-reinforced concrete can be manufactured by continuing water supply. Workers can produce fiber-reinforced concrete in which short fibers are uniformly dispersed only by feeding a fibrous material, so high-quality fiber-reinforced concrete can be easily produced.

  It is preferable to control the on / off operation of the shifter 96 through the manufacturing control unit 71. At that time, it is preferable that driving of the stirring blade 25 and water supply be performed in conjunction with the on / off operation of the shifter 96.

  In addition, the on-site kneading manufacturing unit disclosed here is not limited to the embodiment described above, but also includes various other configurations.

  For example, a surface moisture meter is not essential to the in-situ kneading unit. Even in the case of on-site procurement, sand and gravel with stable water content may be obtained. In that case, cement with stable quality can be manufactured without measuring the water content of sand and gravel in each production. Likewise, temperature sensors are not essential to the on-site mixing and production unit.

  When concrete is manufactured, if data of predetermined manufacturing conditions is not input, the control device 70 may be set so as not to start or restart manufacture of concrete. For example, the control device 70 requests the operator to input data relating to the quality of concrete such as pH of water to be supplied, type and amount of fibrous material, etc. If the data is not input, the production control unit In 71, the production of concrete can not be started or resumed, and the data can be input to start or resume production of concrete.

  By doing so, missing data of important manufacturing conditions can be avoided, and more reliable quality assurance can be performed.

  Instead of gravel and sand, recycled aggregate may be used. Examples of the recycled aggregate include crushed materials of concrete, crushed materials of tiles, recycled materials of slag generated in the iron making process, and recycled materials of industrial waste.

1 Field kneading production unit 10 Unit stand 20 Mixer 30A 1st main hopper 30B 2nd main hopper 31 sub hopper 31
40A First Belt Conveyor 40B Second Belt Conveyor 50 Screw Feeder 60 Water Supply Device 70 Controller 80 Load Cell 91 First Surface Moisture Meter 92 Second Surface Moisture Meter

Claims (6)

A concrete mixing and manufacturing unit in which a plurality of related devices are integrally incorporated on a unit base,
The related device is
A mixer capable of measuring weight change by a load cell,
A first main hopper having a lower portion receiving a first concrete material and having a discharge opening at a lower end and having a shape that is tapered downward ;
A second main hopper which receives the second concrete material, has an outlet at its lower end, and has a lower portion which is shaped to be downwardly inclined ;
The sub hopper which receives the third concrete material,
A first belt conveyor which conveys the first concrete material and feeds it into the mixer;
A second belt conveyor which conveys the second concrete material and feeds it to the mixer;
A screw feeder which conveys the third concrete material and feeds it to the mixer;
A water supply device for supplying water to the mixer;
A control device having a manufacturing condition storage unit that stores measurement values of the load cell;
Including
The mixer is disposed at one end of the unit pedestal in the longitudinal direction and the sub-hopper is disposed at the other end of the unit pedestal in the longitudinal direction of the unit pedestal in a state where the dimensions are enlarged in the short direction of the unit pedestal Between the sub-hopper and the mixer, the first main hopper and the second main hopper are disposed in parallel in the lateral direction of the unit base,
The first belt conveyor and the second belt conveyor are extended from the lower side of the discharge port of the first main hopper and the lower side of the discharge port of the second main hopper to an upper portion of the mixer in a mutually separated state ,
The screw feeder passes through a gap between the lower portion of the first main hopper and the lower portion of the second main hopper from the lower side of the sub hopper, and the space between the first belt conveyor and the second belt conveyor is have been extended with inclined upward toward the mixer, we put the third concrete material toward the center of the top of the mixer situ kneading production unit. In the field kneading production unit according to claim 1,
An on-site kneading and manufacturing unit adjacent to the first main hopper and the second main hopper in a state where the sub-hopper is disposed at an intermediate portion in the lateral direction of the unit base. In the field kneading production unit according to claim 1 or 2,
The on-site kneading and manufacturing unit according to claim 1, wherein the inlet opening in the upper portion of the sub-hopper is located below the inlet opening in the upper portion of each of the first main hopper and the second main hopper. In the on-site kneading and manufacturing unit according to claim 3,
A surface moisture measuring device for measuring the surface moisture of at least one of the first concrete material and the second concrete material is provided,
An on-site kneading and manufacturing unit, wherein the control device includes a water supply amount correction unit that corrects the water supply amount based on the measurement value of the surface moisture measuring device. In the on-site kneading and manufacturing unit according to any one of claims 1 to 4,
The mixer is provided with a fibrous material input portion for receiving a fibrous material as a fourth concrete material,
An on-site kneading and manufacturing unit, wherein the fibrous material loading unit has a net-like sifter attached to a part of the opening of the mixer and a vibrator attached to the sifter. In the field kneading production unit according to any one of claims 1 to 5,
The related device has a rectangular floor surface including a short side of more than 1.5 m and 2 m or less and a long side of more than 3 m and 4 m or less, and the related device is accommodated on the floor surface Is installed,
On-site kneading and manufacturing unit whose total weight is set to 4000 kg or less.

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