JP2006175715A - Apparatus for producing cement milk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for producing cement milk which can supply the cement milk by one vehicle to carry out semi-flexible pavement. <P>SOLUTION: A mixer 3 and a water tank 2 whose upper surface is used as a working table are arranged at the tail end and in the middle, respectively, of a load-carrying platform 1a, and a dust catcher 7 and a generator 10 are arranged on the front side of the platform 1a. The water of the water tank 2 is supplied to a metering tank 6 by a pump. The metering tank 6 is held in a constant posture in spite of the inclination of a truck 1 by a supporting means 5 to perform exact metering. The mixer 3 has a flat bottom plate and is slanted to turn a discharge opening 3a downward to discharge the cement milk. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    The present invention relates to a cement milk manufacturing apparatus used in a semi-flexible pavement in which a cement milk obtained by kneading a special cement with water is filled in a void of an open-graded asphalt mixture.

    For example, in the vicinity of the stop line at the intersection, the life of the pavement is significantly shortened because the start of the automobile is stopped. Therefore, semi-flexible pavement has appeared as a pavement with improved rigidity and flexibility compared to asphalt pavement.

The cement milk production equipment used in this semi-flexible pavement uses a mixer mounted on a truck, a water measuring tank, a bag containing special cement developed for semi-flexible pavement, and a water truck. Move the hose tip of the car to supply water to the mixer via the measuring tank, bring the truck close to the construction site, break the bag containing special cement, put it in the mixer, and mix water and special cement (hereinafter referred to as cement) After that, the truck is moved to the construction site, and the cement milk is discharged and sprayed from the mixer.
JP 2003-094424 A JP 2000-185315 A

    As described above, when the mixer and the measuring tank are loaded on the truck and can be moved together with the water supply vehicle by the conventional technique, two vehicles are required, and the space is excessive when the construction is performed at the intersection. It takes time to follow the construction site because the two vehicles move while measuring the safety of the worker. In addition, since a fast-curing special cement is used in relation to the construction site, the mixer and its surroundings are immediately washed with water even after the paving work is finished, but at that time a water truck must be accompanied.

    An object of the present invention is to provide a cement milk production apparatus capable of supplying cement milk with a single vehicle.

    Since the conventional measuring tank loaded on the truck is a stationary tank, when the truck is tilted depending on the position of the truck, the measured water amount is different from the predetermined amount, and the mixing ratio of cement and water is changed. Cement used for semi-flexible pavement is required to have an accurate mixing ratio with water compared to ordinary cement.

    An object of the present invention is to provide a cement milk manufacturing apparatus provided with a measuring tank capable of accurately measuring the amount of water even when a vehicle is tilted.

    A conventional mortar mixer having a conical bottom having a conical bottom has an outlet at the center of the bottom. Therefore, even if cement and water are added to the stirring tank, the stirring means does not work at the center of the bottom of the stirring tank, and the cement at the center of the bottom of the stirring tank is discharged as powder from the outlet after kneading. Sometimes.

    On the other hand, in a mortar mixer having a stirring tank with a flat bottom plate, it can be tilted around the diameter of the cylindrical peripheral wall of the stirring tank and can be tilted around the diameter, and after kneading, the stirring tank is tilted to the overturned state to remove the mortar. It is discharging.

    When the stirring tank is tilted to the overturned state, the space as the movement path of the stirring tank becomes large. That is, there is a place. In addition, when the stirring tank is tilted to the overturned state, there arises a problem of how to make the inflow side of the hose that conveys cement milk between the mixer and the construction surface.

    An object of the present invention is to provide a mixer in which kneading of water and cement is performed uniformly, and a discharge hose for discharging the finished cement milk and a mixer can be always connected.

    The cement milk production equipment used for semi-flexible pavement repeats the operation of the mixer and performs dredging work. And since the cement powder is thrown into the mixer, the cement powder rises at the time of charging, and the cement powder falls around the operator and the mixer.

    An object of this invention is to provide the manufacturing apparatus of the cement milk used for the semi-flexible pavement improved in the working environment.

1st invention which concerns on this application is an apparatus which manufactures the cement milk used for a semi-flexible pavement,
a. A water tank having a water supply opening for receiving water supplied from the outside, and having a flat lid with a work surface on the top surface;
b. A measuring tank for measuring the water fed from the water tank and supplying the measured water to the mixer;
c. A mixer disposed at the end of the vehicle, supplied with water measured in a measuring tank, and semi-flexible pavement cement, and kneading;
d. A pump device for feeding water from the water tank to the metering tank;
e. A generator for supplying electric power for driving the mixer and the pump device;
f. A vehicle carrying and transporting a water tank, a metering tank, a mixer, a pump device and a generator;
The cement milk production apparatus is characterized in that a mixer is provided at the end of the vehicle and a water tank is provided in front of the mixer.

    According to a second aspect of the present application, the water tank is substantially the same width as the loading platform of the vehicle, and is a hollow rectangular parallelepiped tank body, a tank lid serving as a work table, and an air inlet of the water tank by running of the vehicle. The apparatus for producing cement milk according to the first aspect of the present invention further comprises a splash prevention valve for preventing water from splashing and introducing outside air.

    According to a third aspect of the present application, the measuring tank has a water tank, a measuring means for measuring the water in the water tank, and an attitude control means for constantly setting the attitude of the water tank to measure regardless of the attitude of the vehicle. The cement milk production apparatus according to the first or second invention, wherein the amount of water in the tank is accurately indicated.

    According to a fourth aspect of the present application, the attitude control means for always maintaining the attitude of the water tank has a water tank support member provided above the mixer, and a universal joint for freely supporting the water tank on the support member. A cement milk production apparatus according to the third aspect of the invention.

    According to a fifth aspect of the present invention, the mixer comprises a stirring tank having a substantially flat bottom plate, a stirring means for kneading water having a stirring blade moving along the bottom plate and a semi-flexible pavement cement, and near the bottom plate. The stirring tank is tiltably supported so that the cement milk discharge port provided on the bottom plate of the peripheral wall or near the peripheral wall, the position where the bottom plate is kept almost horizontal, and the position where the bottom plate where the discharge port is located lower is inclined. A cement milk manufacturing apparatus according to any one of the first to third inventions.

    According to a sixth aspect of the present application, the stirring tank supporting means includes a hinge that rotatably supports the vicinity of the edge of the bottom plate side of the stirring tank near the discharge port, and a bottom plate side at a position laterally separated from the hinge. The cement milk manufacturing apparatus according to the fifth aspect of the present invention, further comprising elevating means provided so as to take a position in which the vicinity of the edge is lowered and a position in which the edge is raised.

  According to a seventh aspect of the present application, the mixer has a stirring tank, and stirring means for stirring the water and the cement in the stirring tank. The stirring tank has a cement inlet on the front side and an opening on the top. Any one of the first to sixth inventions, characterized in that it has a hood that covers the opening on the upper surface of the sealed tub, a dust collector, and a dust suction duct that communicates the suction port of the hood and the dust collector. The cement milk production apparatus described in 1.

    According to the first aspect of the present invention, a water measuring tank is provided on the axle, a mixer is provided at the tail of the vehicle, a water tank is provided in front of the mixer, and the water tank is flat and has an upper surface. Since it has a lid that has become a workbench, it is sufficient to place cement on the workbench, put water in the water tank, and go to the work site, so only one vehicle is required. Therefore, it is not necessary to travel with a vehicle loaded with a mixer and two vehicles, as was conventionally the case with a water tank vehicle. At the work site, cement milk can be produced by supplying water, supplying cement, measuring water, and mixing water and cement on one vehicle. Safety is easy because one unit moves at the construction site. Since the water tank is flat, the center of gravity of the vehicle can be kept low, and the position of the work table is also low, so it is easy to load cement and work on the work table. And, at the work site, it is not necessary to be accompanied by a water tanker tank for supplying water for the work and for cleaning the mixer and the periphery of the mixer after the work is finished.

    According to a second aspect of the present invention, in the first aspect of the present invention, in the flat water tank having the same width as the width of the loading platform of the vehicle and having a hollow rectangular parallelepiped tank body and a tank lid serving as a work table, the vehicle is When traveling, water splashed from the air inlet becomes significant, so a splash prevention valve for preventing the splash of water and introducing outside air was provided. Therefore, it is possible to prevent the water in the water tank from being reduced due to the water traveling from the air inlet and the vehicle traveling.

    According to the third invention of the present application, in the first or second invention, since the measuring tank has the posture control means, accurate weighing can always be performed even if the vehicle is tilted. This is effective in ensuring the performance of cement milk using a semi-flexible pavement cement that requires a particularly strict cement ratio.

    According to the fourth invention of the present application, in the third invention, since the attitude control means supports the water tank with a universal joint from the support member, the water tank can be operated without any special operation just by putting water into the water tank. The posture is more stable. And since it is not a posture control means that uses sensors and actuators, inspection and maintenance are easy and there is no failure.

    According to the fifth invention of the present application, in any one of the first to fourth inventions, the mixer has a stirring tank having a substantially flat bottom plate, water having a stirring blade moving along the bottom plate, Stirring means for kneading the flexible pavement cement, a peripheral milk near the bottom plate or a cement milk discharge port provided on the bottom plate near the peripheral wall, a position to keep the bottom plate almost horizontal, and a bottom plate with the discharge port located below By having support means for supporting the stirring tank so as to be tiltable so as to take a tilted position, water and cement in the stirring tank are evenly stirred uniformly. And since cement milk can be discharged | emitted only by inclining a stirring tank with a support means, the installation space of a mixer may be small.

    According to a sixth invention of the present application, in the fourth invention, the supporting means is pivotally supported near the edge on the side of the bottom plate, and the vicinity of the edge on the side of the bottom plate at a position laterally separated from the hinge The lifting / lowering means provided so as to take the lowered position and the raised position, so that the stirring tank can be tilted simply by operating the lifting / lowering means. It is easy to operate because you only have to move up and down.

    According to the seventh invention of the present application, in any one of the first to sixth inventions, the hood and the dust collector that cover the opening on the top surface are used as the stirring tank having the charging port and the closed tank having the opening on the top surface. Since the dust collecting duct is connected, when the dust collector starts to suck in, outside air flows into the stirring tank from the charging port, and cement rising in the stirring tank is not sprayed from the charging port to the outside. Therefore, the worker's hygiene and working environment are kept good.

    The best mode for carrying out the present invention will be described with reference to the drawings.

In an apparatus for producing cement milk used for semi-flexible pavement,
a. A water tank 2 having a water supply port 2a for receiving water supplied from the outside, and having a tank lid 2B which is flat and has a work surface on its upper surface;
b. A measuring tank 6 for measuring the water fed from the water tank 2 and supplying the measured water to the mixer 3;
c. A mixer 3, which is disposed at the end of a vehicle, for example, a truck 1 and supplied with water measured by a measuring tank 6 and cement for semi-flexible pavement, kneading,
d. A pump device comprising valves such as a pump 11 and piping for feeding water from the water tank 2 to the measuring tank 6;
e. A mixer 3, a generator 10 for supplying electric power for driving the pump device;
f. Truck 1 as a vehicle carrying and transporting water tank 2, metering tank 6, mixer 3, pump device and generator 10;
, A mixer 3 is disposed at the end of the truck 1 and a water tank 2 is disposed in front of the mixer 3.

    The water tank 2 is approximately the same width as the loading platform 1a of the truck 1, and is a hollow rectangular parallelepiped tank body 2A, a tank lid 2B serving as a work table, and an air inlet for the water tank 2 when the truck 1 travels. A splash prevention valve 12 for preventing the splash of water from the opening 2e and introducing outside air is provided.

    The measuring tank 6 has a water tank 6a, a water meter 6b with a scale 6c as a measuring means for measuring the water in the water tank 6a, and an attitude control means for always keeping the attitude of the water tank 6a constant. Regardless of the posture, the amount of water in the measuring tank 6a is accurately indicated.

    The attitude control means for always setting the attitude of the water tank 6a to a fixed attitude is to freely support the water tank 6a on the frame 15 as a support member of the water tank 6a provided above the mixer 3, and the upper frame 15a of the frame 15. And a universal joint 16 as a joint.

    The mixer 3 includes a stirring tank 3b having a substantially flat bottom plate 3d, stirring means 3e for kneading water having a stirring blade 3h moving along the bottom plate 3d and semi-flexible pavement cement, and a peripheral wall near the bottom plate 3d. Alternatively, the agitation tank 3b is tilted so that the cement milk discharge port 3a provided on the bottom plate near the peripheral wall, the position where the bottom plate 3d is kept almost horizontal, and the position where the bottom plate 3d where the discharge port 3a is located lower are inclined. And support means 4 for supporting it.

    The support means 4 of the stirring tank 3b includes a hinge 4a that rotatably supports the vicinity of the bottom plate 3d side of the stirring tank 3b near the discharge port 3a, and a bottom plate 3d side at a position laterally separated from the hinge 4a. Elevating means 4b is provided so as to take a position where the vicinity of the edge is lowered and a position where the edge is raised.

    The mixer 3 has an agitation tank 3b and an agitation means 3e for agitating water and cement in the agitation tank 3b, and the agitation tank 3b is a hermetically sealed opening having a cement inlet 3n on the front side and an opening 3q on the upper surface. The hood 8 that covers the opening 3q on the upper surface of the agitation tank 3b, the dust collector 7, and the dust suction duct 9 that communicates the intake port of the hood 8 and the dust collector 7 are provided.

    FIG. 1 is a side view of an apparatus for producing cement milk used in a semi-flexible pavement apparatus.

(overall structure)
A water tank 2 having a water supply port 2a and a water discharge port 2b (see FIG. 7) on a loading platform 1a of a transport vehicle, for example, a truck 1, and a stirring means for mixing water and cement using water in the water tank 2, such as a mixer 3 And a support means 4 for the mixer 3 that can take a position where the mixer 3 stands upright (see FIG. 3) and a position where the outlet 3a of the mixer 3 is tilted downward (see FIG. 4), and the mixer 3 Is a measuring tank for measuring water supplied from the water tank 2 and is supported by supporting means 5 for making the posture constant, a dust collector 7 and a dust collector. A dust collecting means 9 having a hood 8 communicated with the hood 8 provided on the top of the mixer 3 from the hood 7, a dust collecting means having the hood 8, and a pump 11 for feeding water from the water tank 2 to the measuring tank 6 (see FIG. 7) ) And piping (valves A pump device) that is referred to as a diesel generator (hereinafter simply generator) 10 and is mounted.

    Next, we will discuss the deployment of each member except piping. The cab 1b side of the truck 1 is referred to as the front.

    The mixer 3 is provided at the tail end of the loading platform 1a. This is because the cement milk kneaded by the mixer 3 is discharged to the rear of the truck 1 through a pipe. A water tank 2 is disposed on the loading platform 1a immediately in front of the mixer 3. The water tank 2 has a tank lid 2 </ b> B on the upper surface of the water tank 2. The tank lid 2B is wide and has a rectangular plane that is about one half of the area of the loading platform 1a. As a result, the worker can get on the tank lid 2B, and the workability of putting the cement placed on the tank lid 2B into the mixer 3 and controlling the water supply to the measuring tank 6 is good. It has become. Further, an operator on the tank lid 2B can easily operate the dust collector 7 and the generator 10 placed on the cargo bed 1a immediately in front of the water tank 2. Therefore, this cement milk manufacturing apparatus has excellent operability. Since the tank lid 2B is in a position where the height from the loading platform 1a is low, the operator does not feel that he / she is at a high place from his senses, so he is comfortable.

(water tank)
As shown in FIG. 1, the water tank 2 has a width that is close to the vehicle width of the truck 1 at the center of the loading platform 1 a. That is, the width is almost the same as the width of the loading platform. The water tank 2 is made of a flat hollow rectangular steel plate. The water tank 2 has a flat tank lid 2B on the top of a container-like main body 2A. The tank lid 2B also serves as a work table, on which a worker rides and mounts a cement bag.

    As shown in FIG. 7, the main body 2A of the water tank 2 is internally partitioned by a plurality of partition walls 2c, but the lower part of the partition wall 2c is opened so that the compartments 2d on both sides of the partition wall 2c communicate with each other. Yes. The partition wall 2d prevents water from abruptly moving laterally in the water tank 2 when the truck 1 moves. The partition walls 2c are preferably provided in the width direction of the track 1 and also in the traveling direction of the track 1 so as to be arranged like a grid. Because of the partition wall 2c, the movement of water in the water tank 2 is suppressed even when the truck 1 swings.

    Although the water tank 2 is a sealed tank, it is necessary to communicate with the atmosphere in order to pump water from the water tank 2 with the pump 11. Therefore, as shown in FIG. 7, the tank lid 2B is provided with an opening 2e as an air inlet for communicating the inside and outside of the water tank 2, and a water splash prevention valve 12 serving as a check valve is provided in the opening 2e. It is.

    As shown in FIG. 7, in the water splash prevention valve 12, the opening 2e is closed when the ball valve 12b is seated on the valve seat 12a, and the opening 2e is opened when the ball valve 12b is moved downward from the valve seat 12a. When the ball valve 12b is lowered and seated, the seating portion has a cut and the introduction of air into the water tank 2 is not obstructed. Therefore, when the pump 11 is pumping the water in the water tank 2, the outside air can enter the water tank 2 through the opening 2e. Accordingly, the water tank 2 is always at atmospheric pressure. When the truck 1 travels and the water tank 2 swings and water tries to come out from the opening 2e, the ball valve 12b is pushed up by the water and is seated on the valve seat 12a. Therefore, it is possible to prevent water splashing from the opening 2e even if the water tank 2 swings.

    A water pipe 13 is piped to the water tank 2 from the water supply. Reference numeral 13 a denotes a water tap interposed in the water pipe 13. Reference numeral 13b denotes a water supply coupler. The water source side hose is removed from the water supply coupler 13b except during water supply. A drain pipe 14 is piped to the drain port 2b at the bottom of the water tank body 2A. A drain valve 14 a is interposed in the drain pipe 14.

    A suction pipe 11 a of the pump 11 enters the water tank 2. A strainer 11b is provided at the lower end of the suction pipe 11a.

    Both cement and water are needed in large quantities. Therefore, the capacity of the water tank 2 is increased, a place for loading cement is secured, and the water tank 2 is flat and has a large tank lid 2B so that a person who kneads the mixer can easily work. And each apparatus is arrange | positioned around the water tank 2, and operativity is improved.

    The capacity of the water tank 2 is 2100 liters in this example. By flattening the water tank 2, an increase in the center of gravity of the truck 1 is suppressed, and the influence on running stability is reduced.

(Weighing tank)
The water fed from the water tank 2 is weighed, and the metering tank 6 that supplies the water to the mixer 3 is described.

    The measuring tank 6 is disposed above the mixer 3 and supported by the support means 5. As shown in FIG. 2, the upper inner side surface of the mixer 3 has a gate shape as shown in FIG. 2 as a support member for supporting the water tank 6a, and an L-shape that is inverted as viewed from the side surface as shown in FIGS. A frame 15 is provided. The frame 15 is fixed to the stirring tank 3b of the mixer 3 by welding. The water tank 6a is suspended from the center of the upper frame 15a of the frame 15 through a universal joint 16 such as a universal joint 16 for automobiles. The water tank 6a is a hollow rectangular parallelepiped that is flat in the front-rear direction (the same as the front-rear direction of the track 1) and is vertically long. The support means 5 that suspends the water tank 6a by the universal joint 16 is an attitude control means that always keeps the attitude of the water tank 6a constant. This means is not limited to suspending the water tank 6a from the frame 15 via the universal joint 16, but the apparatus is simple to suspend the water tank 6a from the frame 15 via the universal joint 16. In addition, maintenance is easy because an actuator driven to maintain the posture of the water tank, sensors for detecting the posture of the water tank, and a control device for driving the actuator by the signals of the sensors are not used. It is excellent because it is inexpensive.

    As shown in FIG. 2, the water tank 6 a of the measuring tank 6 is provided with a water meter 6 b that can be viewed from the front by an operator whose open water surface is standing on the tank lid 2 </ b> B.

    The water meter 6b is formed by sealing a vertically long slit provided in front of the water tank 6a with transparent glass, and the water tank 6a always maintains a constant posture and faces the vertical direction. A scale 6c is displayed on the water meter 6b. The mixer 3 is supplied with cement after water is put in first.

    As shown in FIG. 8, this display shows the relationship between the water for making the cement milk and the cement bag. For example, the cement supplied when 115 liters of water is put into the mixer 3 indicates that 10 bags of 25 kg of cement bags are opened and supplied. Then, the operator puts water into the water tank 6a until the open water surface has a scale of 115 liters. Next, after 115 liters of water has been put into the mixer 3, cement for 10 bags of cement bags is put into the mixer 3.

    As shown in FIGS. 2 and 3, the frame 15 is provided with catch bars (handrails) 15 b and 15 c which are parallel to the upper frame 15 a so that an operator can grasp it. The holding bar 15b is provided in front of the upper frame 15a, and the holding bar 15c is provided in the rear of the upper frame 15a. Since the operator on the tank lid 2B has the holding bar 15b, it can be held, and when the truck 1 changes its position at the construction site, the operator can keep stable. Similarly, when the truck 1 moves, an operator on the loading platform 1a behind the mixer 3 can keep the handrail 15c and can keep stability.

    In order to supply the metered water to the mixer 3, a water input valve 6 d is attached to the lower surface of the water tank 6 a. The inlet of the water supply valve 6d communicates with the bottom of the water tank 6a, and the outlet thereof is connected to a flexible water supply pipe 17 that is extremely flexible and has little resistance to bending. The lower end of the water supply pipe 17 is fixed to the top plate 3c of the stirring tank 3b of the mixer 3 and communicates with the stirring tank 3b. The upper end of the metering water supply pipe 18 for supplying water to the water tank 6a communicates with the upper part of the water tank 6a and is fixed to the water tank 6a. The lower end of the pipe 18 is connected to a metering water on / off valve 19 which is a three-way switching valve. As the water supply pipe 17 and the metering water supply pipe 18, a flexible pipe having a weak force for flexing greatly is used.

(mixer)
The mixer 3 that is disposed on the loading platform 1a at the end of the truck 1 and that is supplied with water measured by the measuring tank 6 and the semi-flexible pavement cement will be described.

    As shown in FIG. 3, the mixer 3 has a hollow cylindrical stirring tank 3b having a substantially flat bottom plate 3d. In the stirring tank 3b, stirring means 3e for kneading cement and water is provided.

    The stirring means 3e includes a stirring blade 3g, 3h on a shaft stirring shaft 3f arranged at the center of the cylinder of the stirring tank 3b, and a fixed blade provided on the inner peripheral surface of the stirring tank 3b (not shown). The stirring blades 3g and 3h are provided in the radial direction with the circumferential direction equally distributed around the stirring shaft 3f. The lower stirring blade 3h is in close proximity to the bottom plate 3d of the stirring tank 3b. The number of stirring blades 3g and 3h is about 2 to 4, respectively. The fixed blade is provided in a spiral shape so as to guide this fluid downward when the mixture of cement and water in the stirring tank 3b flows around. The fixed blades are provided so that the circumferential direction of the inner periphery of the stirring tank 3b is equally distributed.

    The stirring shaft 3f is supported by bearings (not shown) provided on the top plate 3c and the bottom plate 3d. The upper end of the stirring shaft 3f is connected to the shaft of the motor 3i with a speed reducer. The motor 3i is fixed to the top plate 3c. The top plate 3c is only in the latter half of the hollow cylindrical portion of the stirring tank 3b. The remainder covered with the top plate 3c of the hollow cylindrical portion is an opening 3k. A part of the cylindrical peripheral plate 3j of the stirring tank 3b extends upward from both sides (left and right direction of the track 1) of the opening 3k in front of the top plate 3c to form an upper plate 3j1. A flat back plate 3m is provided so as to connect the upper side plates 3j1 on both sides. The back plate 3m rises from the front edge of the top plate 3c. Therefore, the space surrounded by the upper plate 3j1 and the back plate 3m is open over the entire surface and communicates with the stirring tank 3b. The upper part is opened over the entire surface to form an opening 3q. The opening 3q is covered by the hood 8. The front of the space surrounded by the upper plate 3j1 and the back plate 3m is opened over the entire surface to become a cement inlet 3n. The above-mentioned water supply pipe 17 is connected to the top plate 3c, and a certain amount of water is supplied to the stirring tank 3b through the water supply pipe 17. Thus, the upper part of the stirring tank 3b is a sealed tank except that the upper part is opened at the opening 3q and the upper front face is opened at the charging port 3n. A paving material guide tube 21 is connected to the discharge port 3a of the agitation tank 3b which is a sealed tank.

    A material temporary table 22 is provided in front of the inlet 3n. The temporary table 22 is attached to the stirring tank 3b by a horizontal pivot 22b. The upper surface 22a of the material temporary placement table 22 coincides with the lower edge of the charging port 3n. The temporary table 22 is supported by the stirring tank 3b by a pivot 22d in the vertical direction and the upper edge of the plate 22c having a vertical surface is in contact with the lower surface of the temporary table 22, and the upper surface 22a of the temporary table 22 is horizontal. Keep. As shown by a two-dot chain line in FIG. 3, the temporary table 22 can be lifted upward with the pivot 22b as the center. By raising the temporary table 22 upward, the operation of the lifting / lowering means 4b is facilitated, and maintenance / inspection of the lifting / lowering means 4b and a pump to be described later is facilitated. Further, when the plate member 22c is rotated around the pivot axis 22d and moved along the stirring tank 3b, the temporary placing table 22 can be pivoted about the pivot axis 22b and suspended.

(Mixer support means)
As shown in FIG. 3, the support means 4 of the mixer 3 has a hinge 4a that rotatably supports the vicinity of the edge on the bottom plate 3d side of the agitation tank 3b near the discharge port 3a, and a position laterally separated from the hinge 4a. There is a position where the bottom plate 3d side edge is lowered and an elevating means 4b provided to take the raised position.

    The hinge 4 a has a horizontal center line and is orthogonal to the traveling direction of the track 1. As shown in FIG. 5, there are two hinges 4a that are symmetrical with respect to the center 3b1 of the stirring tank 3b. Since the discharge port 3a is located near the rear end of the loading platform 1a of the truck 1, the hinge 4a is also located near the rear end of the loading platform 1a. The hinge 4a is provided on the machine base 4c fixed on the loading platform 1a.

    As shown in FIG. 3 and FIG. 4, the lifting means 4b is an extension / contraction with end portions pivotally attached to a bracket 3p integrally provided by welding to the peripheral plate 3j of the stirring tank 3b and a stand 4d fixed to the machine base 4c. By means of the device 4e, the bracket 3p can be moved up and down so that the bottom plate 3d of the stirring vessel 3b takes a horizontal position and a position tilted with the discharge port 3a facing downward. The lifting / lowering means 4b is located at a position for dividing the hinges 4a and 4a into two equal parts (center 3b1 of the stirring tank 3b) as shown in FIG. 5, and is far away from the hinge 4a in the lateral direction as shown in FIGS. .

    Various devices can be selected as the expansion device 4e. In this example, the stirring tank side screw member 4e2 whose one end is coupled to the bracket 3p fixed to the peripheral plate 3j, and the machine base side screw member 4e4 coupled to the stand 4d fixed to the machine base 4c by the pin 4e3. And nuts with clutches 4e5 and 4e6 screwed into the respective screw members 4e2 and 4e4, a hollow cylindrical tube 4e7 integrally holding the clutch side of the nuts with clutches 4e5 and 4e6, An operation lever 4e8 that is integral with the body 4e7 and extends radially from the outer periphery of the cylinder 4e7 is provided.

    Here, the agitation tank side screw member 4e2 and the machine base side screw member 4e4 are each arranged in a straight line with male screws, and the twist directions of the screws are opposite to each other.

    Each of the nuts with clutches 4e5 and 4e6 has a one-way clutch capable of changing the operation direction on the outer periphery and an operation direction conversion lever (not shown) of the clutch. The conversion lever is integrally provided so as to simultaneously switch the operating directions of the nuts with clutches 4e5, 4e6.

    As another method that can be adopted as the lifting means, the pins 4e1 and 4e3 may be coupled by a clevis type fluid pressure cylinder. Further, the other end of the male screw rod having one end screwed into the same pin-coupled nut as the pin 4e1 to one of the bracket 3p and the stand 4d is connected to either the bracket 3p or the stand 4d where the above-mentioned nut is not connected. It may be fitted to a pin-coupled bearing similar to that so as not to move in the axial direction (not shown).

(Mixer unit)
As described above, the mixer 3 is supported on the machine base 4c. The mixer 3 supports the measuring tank 6 via the frame body 15. A pump 11 is installed together with a motor 11d on the machine base 4c. The relief valve 24 is fixed to the machine base 4c. Therefore, the mixer 3, the metering tank 6, the pump 11, and the relief valve 24 constitute an integrated mixer unit by the machine base 4 c.

    Therefore, the assembly of the cement milk production apparatus on the loading platform 1a is performed by arranging the water tank 2, the mixer unit, the dust collector 7 and the generator 10 and fixing them to the loading platform 1a, and performing water-related piping and electrical wiring. It ’s enough.

(Pump device and piping)
A pump device for feeding water from the water tank 2 to the measuring tank 6 will be described.

    FIG. 7 shows a water circuit diagram. The pump 11 is driven by a motor 11d. When the pump 11 is driven, the water in the water tank 2 is sucked into the pump 11 through the strainer 11b and the suction pipe 11a, and is accelerated and boosted. The water discharged from the discharge port is discharged into the discharge pipe 11c. It reaches the inlet port 19d of the metering water inlet / outlet valve 19 which is a three-way switching valve via the check valve 11e. The metering water inlet / outlet valve 19 has one outlet port 19a leading to the metering tank 6 via the metering water supply pipe 18, and the other outlet port 19b leading to the washing gun 23 via the hose 23a. Outlet port 19c is blocked. In FIG. 7, the metering water inlet / outlet valve 19 is schematically expressed as a direct acting valve, but is a rotary valve.

    The measuring tank 6 has an overflow drain 6e and a drain pipe 6f that hangs down from the overflow drain 6e so that overflowed water is drained when the upper limit water level above the maximum scale is reached. A return pipe 6g made of a flexible pipe connected to the lower end of the drain pipe 6f communicates with the water tank 2 via a check valve 6h. Here, the return tube 6g is a tube that is easily bent and has a long length.

    A pipe 11f branched from the discharge pipe 11c of the pump 11 communicates with the water tank 2 via a relief valve 24 interposed in the pipe.

    When the pump 11 is driven by the action of the water circuit, the water in the water tank 2 is sucked into the pump 11 through the strainer 11b and the suction pipe 11a. The water increased in pressure by the pump 11 flows through the discharge pipe 11c and the check valve 11e, but if the metering water on / off valve 19 which is a three-way switching valve is blocked, the water is supplied from the pipe 11f through the relief valve 24. Return to water tank 2.

    When the operator operates to open the outlet port 19a of the metering water on / off valve 19, the water sent from the discharge pipe 11c is supplied to the metering tank 6 via the metering water switching valve 19 and the metering water supply pipe 18. . When the outlet port 19b is opened by the metered water on / off valve 19, the water sent from the discharge pipe 11c reaches the cleaning gun 23 through the metered water switching valve 19 and the pipe 23a. When the cleaning gun 23 is opened, pressure water is ejected. The cleaning gun 23 is used for cleaning each part of the apparatus for producing the cement milk.

(Generator)
The generator 10 is a diesel generator in this example. A generator 10 serves as a power source for supplying power to a drive motor 11d of the pump 11, a motor 3i with a speed reducer for driving the mixer, a dust collector 7 to be described later, a light projector mounted on the truck 1 (not shown), and the platform 1a immediately after the cab 1b. It was mounted on one of the left and right sides when viewed from the direction of travel of the track 1. Thus, the worker can easily approach the generator 10 by walking on the tank lid 2B, and the operability of the generator is improved.

(Dust collector)
In the manufacturing operation of cement milk, the water measured in the measuring tank 6 flows into the mixer 3.

    The cement bag is broken on the temporary material table 22 and charged into the stirring tank 3b containing water from the charging port 3n. Then, the powdered cement becomes like a mist as if the volume suddenly expanded, and blows out from the inlet 3n. It is easy for an operator to cover the blown cement, and the cement blown out from the charging port 3n for the powder is scattered over a wide range of the truck bed 1a. In some cases, it is necessary to consider that the cement powder falls to the periphery of the truck 1.

    Therefore, it is conceivable to make the insertion port 3n small or to provide a check damper at the insertion port 3n, but all of them deteriorate the workability.

    Even if attention is paid to the cement into the mixer, the blowing of cement powder from the inlet tends to occur. Therefore, the worker wears a mask to prevent the inhalation of cement powder.

    Therefore, in the embodiment of the present invention, the dust collecting means is mounted on the truck. As shown in FIG. 1, the dust collecting means has a dust collector 7, a hood 8, and a dust suction duct 9.

    The dust collector 7 is arranged on the loading platform 1a together with the generator 10 immediately after the cab 1b. The dust collector 7 has a front side facing the tank lid 2B. Although not shown, the dust collector 7 has a switch of an operation member, an outlet for collecting dust, and the like.

    As shown in FIG. 3, the lower end of the hood 8 is connected to the edge of the opening 3q provided on the uppermost surface of the agitation tank 3b, and the cross section is gradually reduced upward. The reduced upper end 8a is opened, and the bent pipe 9a Connected to one end. The other end of the bending tube 9a facing the horizontal direction is connected to the upper end of the flexible tube 9b. The lower end of the flexible tube 9b is coupled to one end of the straight tube 9c. As shown in FIG. 1, the other end of the straight pipe 9c is connected to the suction port of the dust collector 7 through a bent pipe 9d and a flexible pipe 9e. The straight pipe 9 c is disposed in the horizontal direction along the side surface of the water tank 2.

    As shown in FIG. 2, an apron 8b hangs from the upper edge 3n1 of the opening serving as a cement inlet 3n which is a material of cement milk. The apron 8b is a heavy flexible sheet, and is made of, for example, a thick soft vinyl chloride sheet or a rubber sheet. Since only the upper edge of the apron 8b is fixed to the upper edge 3n1 of the opening 3n, even if the mouth of the cement bag is looked into the stirring tank 3b rather than the opening 3n, the apron 8b is moved diagonally upward to the back by the cement bag. Since it is pushed, the supply of cement to the stirring tank 3b is not hindered. Since the apron 8b limits the area of the inlet 3n to be substantially small, when the dust collector 7 is driven to suck the gas in the stirring tank 3b through the dust suction duct 9 and the hood 8, the inside of the stirring tank 3b The degree of negative pressure is increased, and the spraying of cement from the charging port 3n to the outside of the stirring tank 3b is suppressed.

(Safety handrail)
As shown in FIGS. 1 and 2, handrails 25 are provided on both sides of the loading platform 1 a of the truck 1. The handrails 25 are pivotally attached to the pawls 1c pivotally attached to the loading platform 1a, and the upper ends of the same length of the heel members 25a are pivotally attached to the horizontal handrail rod 25b. Although not shown, a latch for fixing the heel member 25a is provided. When this latch is applied, the handrail rod 25b and the heel member 25a are fixedly fixed. Since the handrail 25 is a link that can move in parallel on a plane parallel to the paper surface of FIG. 1 when the latch is removed, the heel member 25a swings around the lower end, and the handrail bar 25a faces the loading platform 1a. The robot moves in parallel and is seated and stored near the loading platform 1a.

(Whole work)
Before the work starts, cement bags are stacked on the tank lid 2B. At this time, the stacking place is the side where the dust collector 7 and the generator 10 are located. In front of the mixer 3, nothing is placed on the tank lid 2B so that an operator can stand on the tank lid 2B.

    The water tank 2 is supplied with water from a water supply port 2a through a water supply tap 13a opened from a water supply pipe 13 connected to a commercial water supply or a private water supply by a water supply coupler 13b. The water supply is filled in advance as work preparation. In this example, the load capacity of the truck 1 is 4 tons. The capacity of the water tank 2 is 2100 liters. Accordingly, only half of the load capacity of the truck 1 is occupied by water alone. However, since the water tank 2 is flat, the center of gravity of the truck 1 is not increased unnecessarily. Further, since the water tank 2 forms the compartment 2d with the partition wall 2c, movement of water inside caused by acceleration / deceleration of the track 1 is suppressed. Accordingly, when there is no water source at the construction site, the truck 1 can travel stably and reach the construction site even at a long distance after supplying tap water from a water source far away from the construction site.

    When the truck 1 reaches the construction site, the rear part of the truck 1 is directed to the construction site. At this time, an on-off valve (not shown) provided at the tip or base of the pavement material guide tube 21 is closed.

    Next, the pump 11 is driven. A switch (not shown) of the motor 11d is turned on to drive the pump 11. The pump 11 pumps the water in the water tank 2 through the strainer 11b and the suction pipe 11a. In the pump 11, the water is increased in speed and pressure, and reaches the inlet port 19d of the metering water on / off valve 19 through the discharge pipe 11c and the check valve 11e. Since the inlet port 19d of the metering water on / off valve 19 coincides with the outlet port 19c at the block position, when the discharge pressure of the pump 11 increases to the set pressure of the relief valve 24, the pressurized water in the discharge pipe 11c passes through the pipe 11f. The relief valve 24 returns to the water tank 2.

    When the operator switches the metering water on / off valve 19 through the outlet port 19a and the inlet port 19d, the water flowing through the discharge pipe 11c from the pump 11 through the outlet port 19a from the inlet port 19d passes through the water supply pipe 18 for metering. It flows into the water metering tank 6 in which 6d is closed.

    The operator monitors the supply of water to the water metering tank 6 by looking at the water meter 6b. When the open surface of the tank 6 coincides with the scale “115 liters-10 bags”, the metering water inlet / outlet valve 19 is blocked to stop the supply of water.

    This measuring tank 6 is suspended by the supporting means 5 of the measuring tank. For this reason, even if the construction site is inclined and the truck 1 is inclined, the measuring tank 6 always maintains a constant posture. For example, as shown in FIG. 6, even if the tires 1d and 1d of the track 1 step on the surfaces 26a and 26b of the road surface 26 having different heights and the track 1 is inclined at an angle α with respect to the horizontal plane 27, the measuring tank 6 Swings around the universal joint 16, and the center 6i of the measuring tank 6 faces in the vertical direction. Although FIG. 6 shows the case where the truck 1 is tilted to the left and right, the measuring tank 6 is in a fixed posture regardless of the direction of the tilting of the truck 1, so the amount of water measured by the scale 6c actually matches the display. ing. In particular, the direction of the inclination of the track 1 does not affect the weighing even if the water meter 6b is provided in a shifted manner as in this example.

    When the measurement of water in the measuring tank 6 is finished, the water introduction valve 6d is opened. A predetermined amount of water measured in the measuring tank 6 flows into the stirring tank 3b through the water input valve 6d and the water supply pipe 17. Since the opening / closing valve (not shown) provided in the pavement material guide tube 21 is closed, a predetermined amount of water for kneading 10 cement bags is collected in the stirring tank 3b.

    Next, the dust collector 7 is driven. As a result, the air in the agitation tank 3b is sucked into the dust collector 7 through the dust suction duct 9, so that the agitation tank 3b has a negative pressure, and an air flow is generated in which the air flows into the agitation tank 3b from the material input port 3n.

    Cement is put into the mixer 3 which is upright and the bottom plate 3d is almost horizontal.

    In order to put the cement bag into the mixer, the cement bag (weight 25 kg) mounted on the water tank lid 2B is carried and placed on the material temporary table 22. Then, the mouth side of the cement bag placed on the material temporary table 22 is put into the stirring tank 3b through the charging port 3n to break the bag. When the bottom side of the cement bag is lifted, the mouth side is turned down, and the cement in the cement bag is put into the stirring tank 3b.

    At this time, the inlet 3n is partially blocked by the cement bag. For this reason, the flow velocity of air in the charging port 3n that has been flowing from the charging port 3n to the stirring tank 3b until now increases. Therefore, since the atmosphere flows in the stirrer 3b around the cement bag at a rapid speed from the input port 3n, the cement dust that falls to the bottom of the stirrer 3b and rises as mist is charged into the input port. Without going out of the mixer 3 from 3n, it passes through the hood 8 and is sucked into the dust suction duct 9 and led to the dust collector 7. In the dust collector 7, the dust and air of the cement are separated by a separating means such as a filter or a cyclone flow, the air is diffused into the atmosphere, and the separated cement is collected in a collecting container (not shown).

    If 250 kg of cement is used for manufacturing cement milk at one time, the operation of breaking the cement bag and putting it in the mixer 3 is repeated 10 times.

    Next, when the switch for the mixer 3 (not shown) is turned on, the motor 3i with a speed reducer is energized, and the stirring means 3e having the stirring shaft 3f with the stirring blades 3g and 3h rotates. Thereby, water and cement are kneaded in the stirring tank 3b. In this kneading, the lower stirring blade 3h protrudes from the stirring shaft 3f in the radial direction of the stirring shaft 3f and is close to the bottom plate 3d, so that the cement and water are well mixed, and the center of the stirring means 3e is also on the bottom plate 3d. In this case, only the cement does not remain, and the water and the cement are well stirred in a short time.

    When the mixer 3 is stopped after a predetermined time of operation, there is cement milk that is uniformly kneaded inside the mixer. The dust collector 7 needs to be operated at least when the cement is put into the mixer 3 and when the mixer 3 is operated.

    Next, a switching lever (not shown) of the lifting / lowering means 4b is switched so that the clutch operating direction is in the raised position. As shown in FIG. 3, when the operation lever 4e8 is repeatedly swung back and forth from the state where the mixer 3 is in the upright position, the nut portions of the nuts with clutches 4e5 and 4e6 sequentially rotate in one direction, Since the members 4e2 and 4e4 are distant from each other, as shown in FIG. 4, the pins 4e1 and 4e3 are also distant, the bracket 3p is lifted, and the mixer 3 is tilted so that the discharge port 3a is downward with the hinge 4a as the center.

    In this state, when an opening / closing valve (not shown) provided at the tip or the base side of the pavement material guide tube 21 is opened, the cement milk in the stirring tank 3b is spread through the pavement material guide tube 21 to the construction site.

    Since the bottom plate 3d is inclined with the discharge port 3a facing downward, even if the cement milk in the agitation tank 3b decreases, it can easily flow to the end.

    When the metering water is supplied to the mixer 3, the cement is charged, the mixer 3 is operated, and the cement milk is discharged repeatedly. When the cement milk is completely supplied at the work site, the mixer 3 is cleaned. For this cleaning, the water tank 2 → pump 11 → check valve 11e → metered water on / off valve 19 → water metering tank with the water inlet valve 6d in the water supply path from the water metering tank 6 to the mixer 3 opened. 6 → Water is supplied into the mixer 3 and the stirring tank 3b of the mixer 3 to clean the inside. At this time, the pavement material guide tube 21 is closed after the minimum amount of water is flown so as not to flow. In addition, the metering water on / off valve 19 is switched to feed water to the cleaning gun 23 and sprayed into the stirring tank 3b using the cleaning gun 23 to clean the stirring means 3e. Thereafter, the diesel generator 10 is stopped after the pump 11 and the dust collector 7 are stopped. Thereafter, after the guide tube 21 is stored in the loading platform 1 a, the truck 1 is moved to a place where water can be drained, such as a factory that has started running, and the water used for washing in the mixer 3 is drained through the guide tube 21.

Industrial application fields

  In the embodiment, the water tank is flat and low and placed in the center of the truck bed, and the mixer and the metering tank are placed adjacent to the water tank at the end of the traveling direction of the truck, so a large amount of cement is placed on the water tank. In addition, the work area of the worker can be taken sufficiently, so that workability is high.

    The water tank is approximately the same width as the truck bed and can be boarded and unloaded from either the left or right side of the truck. And since there is a splash prevention valve, the water tank can be sealed, and there is no water splash during truck running.

    Regardless of the attitude of the truck, the water tank always takes a constant attitude with respect to the ground regardless of the attitude of the truck. The means for keeping the measuring tank always constant is simple, quick and accurate when the water tank is suspended by a universal joint.

    The mixer is supported by the supporting means so that the bottom plate is flat and the bottom plate is horizontal and the drain outlet is inclined downward, so that the cement and water are mixed uniformly. The cement milk is discharged without any residue. At that time, since the stirring tank is simply tilted, the stirring tank is not toppled like a mortar mixer, so the installation space for the mixer is small and suitable for deployment on a truck.

    Since the stirring tank support means is a hinge and a lifting / lowering means, the structure is simple.

    The mixer has a hood with a sealed tank as a closed tank that covers the top opening and a cement inlet on the front of the upper part, and the hood and dust collector are connected by a dust suction duct. Since an air flow is generated, the cement dust thrown into the agitation tank does not rise from the inlet, which can contribute to the improvement of the working environment.

It is a side view of the apparatus which manufactures cement milk. It is a front view of the mixer and the measurement tank seen from the tank lid. It is a left view of a measurement tank, a mixer, and a pump apparatus. It is a right view of a measuring tank, a mixer, and a pump apparatus. It is a rear view of the apparatus which manufactures cement milk. It is a rear view which shows the effect | action of a measurement tank. It is a water circuit diagram. It is a front view of a measurement tank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Truck 1a ... Loading platform 1b ... Cab 1c ... Aori 1d ... Tire 2 ... Water tank 2A ... Main body 2a ... Water supply port 2B ... Tank lid 2b ... Drain port 2c ... Partition wall 2d ... Partition 2e ... Opening 3 ... Mixer 3a ... Discharge port 3b ... Stirrer 3b1 ... Center 3c ... Top plate 3d ... Bottom plate 3e ... Stirring means 3f ... Stirrer shaft 3g ... Stirrer blade 3i ... Stirrer blade 3i ... Motor with speed reducer 3j ... Peripheral plate 3j1 ... Upper plate 3j2 ... Rear plate 3k ... Opening 3m ... Back plate 3n ... Material inlet 3n1 ... Upper edge 3p ... Bracket 3q ... Opening 4 ... Mixer support means 4a ... Hinge 4b ... Lifting means 4c ... Machine base 4d ... Stand 4e ... Telescopic device 4e1 ... Pin 4e2 ... Stirring tank side screw member 4e3 ... Pin 4e4 ... Machine base side screw member 4e5, 4e6 ... Nut with clutch 4e7 ... Cylindrical body 4e8 ... Control lever 5 ... Metering tab 6 ... Water metering tank 6a ... Water tank 6b ... Water meter 6c ... Scale 6d ... Water input valve 6e ... Overflow drain port 6f ... Drain pipe 6g ... Return pipe 6h ... Check valve 6i ... Center 7 ... Dust collector 8 ... Hood 8a ... Upper end 8b ... Apron 9 ... Dust suction duct 9a ... Curved tube 9b ... Flexible tube 9c ... Straight tube 9d ... Curved tube 9e ... Flexible tube
DESCRIPTION OF SYMBOLS 10 ... Diesel generator 11 ... Pump 11a ... Suction pipe 11b ... Strainer 11c ... Discharge piping 11d ... Motor 11e ... Check valve 11f ... Piping 12 ... Water splash prevention valve 12a ... Valve seat 12b ... Ball valve 13 ... Water supply piping 13a ... Water faucet 13b ... Water supply coupler 14 ... Drain piping 14a ... Drain pulp 15 ... Frame 15a ... Upper frame 15b, 15c ... Hanging bar 16 ... Universal joint 17 ... Water supply pipe 18 ... Water supply pipe 19 for metering 19 Valve 19a ... Outlet port 19b ... Outlet port 19c ... Outlet port 19d ... Inlet port 21 ... Pavement material guide tube 22 ... Material temporary placement table 22a ... Upper surface 22b ... Axis 22c ... Plate material 22d ... Axis 23 ... Cleaning gun 23a ... Hose 24 ... Relief Valve 25 ... handrail 25a ... hard member 25b ... handrail stick
26: Road surface 26a, 26b ... Surface 27 ... Horizontal plane α ... Angle

Claims (7)

In an apparatus for producing cement milk used for semi-flexible pavement,
a. A water tank having a water supply opening for receiving water supplied from the outside, and having a flat lid with a work surface on the top surface;
b. A measuring tank for measuring the water fed from the water tank and supplying the measured water to the mixer;
c. A mixer disposed at the end of the vehicle, supplied with water measured in a measuring tank, and semi-flexible pavement cement for kneading;
d. A pump device for feeding water from the water tank to the metering tank;
e. A generator for supplying electric power for driving the mixer and the pump device;
f. A vehicle carrying and transporting a water tank, a metering tank, a mixer, a pump device and a generator;
A cement milk production apparatus comprising: a mixer disposed at a rearmost position on a vehicle, and a water tank disposed in front of the mixer. The water tank is almost the same width as the loading platform of the vehicle, preventing the water from splashing from the air inlet of the water tank when the vehicle is running, and the tank body that is a hollow cuboid, the tank lid that is the work platform The apparatus for producing cement milk according to claim 1, further comprising a splash prevention valve for introducing outside air. The measuring tank has a water tank, a measuring means for measuring the water in the water tank, and a posture control means for keeping the posture of the water tank always constant, and the amount of water in the measuring tank is accurately indicated regardless of the posture of the vehicle. The cement milk manufacturing apparatus according to claim 1 or 2, characterized in that. 4. The attitude control means for always setting the attitude of the water tank to a fixed attitude includes a water tank support member provided above the mixer, and a universal joint for freely supporting the water tank on the support member. The cement milk production apparatus as described. The mixer is provided in a stirring tank having a substantially flat bottom plate, a stirring means for kneading water having a stirring blade moving along the bottom plate and semi-flexible pavement cement, and a peripheral wall near the bottom plate or a bottom plate near the peripheral wall. And a supporting means for tiltably supporting the agitation tank so that the bottom plate is positioned substantially horizontally and the bottom plate where the discharge port is positioned below is inclined. The cement milk manufacturing apparatus according to any one of claims 1 to 3, wherein The stirring tank support means includes a hinge for pivotally supporting the vicinity of the edge of the bottom plate of the stirring tank near the discharge port, and a position where the edge of the bottom plate is lowered and raised at a position laterally separated from the hinge. The cement milk manufacturing apparatus according to claim 5, further comprising elevating means provided so as to take the position. The mixer has a stirring tank and stirring means for stirring the water and cement in the stirring tank, and the stirring tank is a closed tank having a cement inlet on the front side of the upper part and an opening on the upper surface. The cement milk manufacturing apparatus according to any one of claims 1 to 6, further comprising: a hood that covers an opening on the upper surface of the hood, a dust collector, and a dust suction duct that communicates the suction port of the hood and the dust collector.

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