Mixer unit

Abstract

To effectively miniaturize the entire device. [Solution] A mixer apparatus 50 for manufacturing a cement-based composition comprises a hopper 51 into which materials are introduced, a stirring means 52 including a rotating shaft 52A rotatably mounted on the hopper 51, and a plurality of blade members 52B that are integrally rotatable on the rotating shaft 52A and stir the materials in the hopper 51, and a discharge port 54 provided on the bottom side of the hopper 51 for discharging the cement-based composition stirred by the blade members 52B from the hopper 51, wherein the plurality of blade members 52B include one or more first blade members 52B1 provided on one side of the discharge port 54 and one or more second blade members 52B1 provided on the other side, and the first blade members 52B1 and the second blade members 52B1 are configured to rotate integrally with the rotating shaft 52A so as to collect the cement-based composition in the hopper 51 toward the discharge port 54.

Description

[Technical Field]

[0001] This disclosure relates to a mixer apparatus, and more particularly to a technology suitable for manufacturing cement-based hardening materials used in repair and reinforcement (renewal) work on existing bridge decks. [Background technology]

[0002] Existing bridge decks, such as those of road bridges, can experience deterioration over time due to repeated wheel loads, including concrete soiling, lifting and spalling of the concrete cover over the reinforcing bars, and corrosion of steel materials due to chloride ions. One known countermeasure is the deck slab thickening method, which involves chipping away the deteriorated upper layer of the existing deck slab, pouring a cement-based hardening material onto the surface to integrate it, and thereby thickening the deck slab for repair and reinforcement.

[0003] For example, Patent Document 1 discloses a construction system in which a cement-based hardening material (fiber-reinforced concrete) manufactured in a factory is transported to the site by an agitator truck, the cement-based hardening material transported by the agitator truck is put into a mixing and distribution device installed at the site, and the cement-based hardening material distributed by the mixing and distribution device is spread and compacted by a compaction device. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-135412 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] In the construction system described in Patent Document 1, cement-based hardening material manufactured in a factory or the like is transported to the site by an agitator truck. This raises concerns that it may obstruct the passage of general vehicles or that delays in the arrival of the cement-based hardening material at the site due to traffic congestion may cause delays in construction. To solve these problems, for example, a mixer device could be placed at the site, and the materials for the cement-based hardening material could be mixed on-site to directly manufacture the cement-based hardening material there.

[0006] To easily deploy a mixer unit on-site, it is conceivable to mount the mixer unit on the back of a vehicle or similar structure. However, when a mixer unit is mounted on a vehicle, if the hopper volume needs to be secured, the mixer unit becomes larger, creating a problem where the height from the road surface to the top of the mixer unit cannot be kept within the height limits of the Road Act. On the other hand, if the hopper volume is reduced, the manufacturing capacity decreases, creating a problem where the cement-based hardening material cannot be continuously poured. In particular, if a slope is provided at the bottom of the hopper to allow the cement-based hardening material inside the hopper to be smoothly discharged from the discharge port at the bottom of the hopper, the hopper volume becomes significantly smaller, raising concerns that the manufacturing capacity will be greatly reduced.

[0007] The technology disclosed herein has been made in view of the above circumstances, and aims to provide a technology that can effectively miniaturize the entire mixer device. [Means for solving the problem]

[0008] The mixer apparatus of this disclosure is A mixer apparatus (50, 55) for producing a cement-based composition containing a cement-based hardening agent (C), Hoppers (51, 56) into which the materials of the cement-based composition are introduced, A stirring means (52, 57) includes a rotating shaft (52A, 57A) rotatably mounted on the hopper (51, 56), and a plurality of blade members (52B, 57B) integrally rotatably mounted on the rotating shaft (52A, 57A) for stirring the material in the hopper (51, 56), The hopper (51, 56) is provided with an outlet (54, 59) located at the bottom, which discharges the cement-based composition produced by stirring with the blade members (52B, 57B) from inside the hopper (51, 56). The plurality of blade members (52B, 57B) include at least one first blade member (52B1, 52B2) provided on one side of the discharge port (54, 59) and at least one second blade member (52B1, 52B2) provided on the other side. The first blade members (52B1, 52B2) and the second blade members (52B1, 52B2) are configured to rotate integrally with the rotating shafts (52A, 57A) to collect the cement-based composition in the hopper (51, 56) towards the discharge port (54, 59).

[0009] In a mixer apparatus of another aspect of this disclosure, It is desirable that the first blade members (52B1, 52B2) and the second blade members (52B1, 52B2) intersect each other at different angles with respect to the rotation axis of the rotation shaft (52A, 57A).

[0010] Mixer apparatuses in other aspects of this disclosure include: If we define the angle (θ) of one side with respect to the axis of rotation as a positive value, and the angle (θ) of the other side with respect to the axis of rotation as a negative value, It is desirable that the first angle (θ) at which the plane of the first blade member (52B1, 52B2) intersects with the axis of rotation is a positive value, and the second angle (θ) at which the plane of the second blade member (52B1, 52B2) intersects with the axis of rotation is a negative value with the same absolute value as the first angle (θ).

[0011] In a mixer apparatus of another aspect of this disclosure, It is desirable that the rotational trajectory of one end of the blade member (52B) is configured to overlap with the rotational trajectory of the other end of another blade member (52B) adjacent to it in the direction of the rotational axis of the rotational axis (52A, 57A).

[0012] In a mixer apparatus according to another aspect of the present disclosure, A bottom portion of the hopper (51, 56) is formed in an arcuate shape curved to protrude downward, It is preferable that the plurality of blade members (52B1) are each formed in a plate shape having an arcuate outer peripheral edge, and configured to rotate integrally with the rotating shaft (52A, 57A) while a minute gap is provided between the edge and an inner peripheral surface on the bottom side of the hopper (51, 56).

[0013] A mixer apparatus according to another aspect of the present disclosure, a cylindrical input port (51B, 56B) which is provided at an upper part of the hopper (51, 56) and is for feeding the material into the hopper (51, 56); it is preferable to further comprise a vibrating screen device (90) which is provided in the input port (51B, 56B) and loosens the compressed material by applying vibration to the material fed into the input port (51B, 56B) in a compressed state and sieving the material.

[0014] In a mixer apparatus according to another aspect of the present disclosure, it is preferable that the vibrating screen device (90) comprises: a mesh-shaped screen member (91, 92) formed by arranging a plurality of bars in a grid pattern; and a vibration applying device (95) that applies vibration to the screen member (91, 92) to move the screen member (91, 92) up and down.

[0015] In a mixer apparatus according to another aspect of the present disclosure, it is preferable that the screen member (91, 92) comprises: an upper screen member (91) arranged on an upper side; and a lower screen member (92) arranged below the upper screen member (91) and having a finer mesh than the upper screen member (91).

[0016] In a mixer apparatus according to another aspect of the present disclosure, The vibration device (95) preferably includes a drive source (96), a rod (97) that rotates by rotational power output from the drive source (96), and eccentric cams (98, 99) that are integrally rotatable with the rod (97) and on which the sieve members (92) are mounted, and is configured such that the sieve members (91, 92) move randomly up and down as the eccentric cams (98, 99) rotate.

[0017] In the above description, the reference numerals used in the embodiments are indicated in parentheses next to the constituent elements corresponding to the embodiments in order to aid in understanding this disclosure; however, each constituent element is not limited to the embodiments defined by the aforementioned reference numerals. [Effects of the Invention]

[0018] According to the technology disclosed herein, the entire mixer apparatus can be effectively miniaturized. [Brief explanation of the drawing]

[0019] [Figure 1] This is a schematic diagram illustrating the overall outline of the deck slab thickening work. [Figure 2] This is a schematic perspective view showing an example of applying the construction system according to this embodiment to a floor slab thickening project. [Figure 3] This is a schematic side view of the manufacturing and supply system according to this embodiment. [Figure 4] This is a schematic side view showing the state when cement-based hardening material is discharged in the manufacturing and supply system according to this embodiment. [Figure 5] This is a schematic rear view of the manufacturing and supply system according to this embodiment. [Figure 6] (A) is a schematic diagram of the first stirring member according to this embodiment viewed from above, and (B) is a schematic diagram of the first stirring member viewed from the direction of the rotation axis. [Figure 7] This is a schematic diagram illustrating the vibrating screen device according to this embodiment. [Figure 8]This is a schematic diagram illustrating the manufacturing process of cement-based hardening material using the manufacturing and supply system according to this embodiment. [Figure 9] This is a schematic diagram illustrating the construction method (first construction method) according to this embodiment. [Figure 10] This is a schematic diagram illustrating the construction method (second construction method) according to this embodiment. [Figure 11] This is a schematic diagram illustrating the construction method (third construction method) according to this embodiment. [Figure 12] This is a schematic diagram illustrating the construction method (fourth construction method) according to this embodiment. [Modes for carrying out the invention]

[0020] The mixer apparatus according to this embodiment will be described below with reference to the attached drawings.

[0021] [Overview] First, before describing the details of this embodiment, we will explain the general overview of typical deck slab thickening work. Figure 1(A) is a schematic cross-sectional view of bridge 1. Bridge 1 mainly comprises an existing deck slab 10, a main girder 15 to which the existing deck slab 10 is fixed, and a wall parapet 17 (or protective fence, etc.) installed at the end of the existing deck slab 10 in the road width direction X. In Figure 1, the existing deck slab 10 is shown as a concrete deck slab, but it may also be a steel deck slab.

[0022] Bridge 1 is, for example, a road bridge on an expressway or motorway, and has multiple lanes (two lanes in the illustrated example). Bridge 1 may be a single-lane road bridge or a road bridge with three or more lanes. For convenience, in the following description, Bridge 1 will be described as a two-lane road bridge.

[0023] In the bridge deck thickening work, as shown in Figure 1(A), cones 3 and temporary protective fences are installed between lanes L1 and L2 along the bridge axis Y, thereby restricting one lane on each side while keeping the other lane open to traffic (in the illustrated example, lane L1 is restricted and lane L2 is open). Hereafter, the area of ​​the restricted lane (which may also include the shoulder) will be referred to as work zone A.

[0024] As shown in Figure 1(B), within work zone A, the deteriorated upper layer of the existing deck slab 10 is first chipped away using a water jet or breaker, and then cleaned. Note that chipping away may also be done to roughen the surface by processing the last few millimeters. Once the deteriorated parts of the existing deck slab 10 have been removed, as shown in Figure 1(C), a cement-based hardening agent C is poured and spread evenly, and then sheet curing (not shown) is performed. Once the cement-based hardening agent C has hardened to the strength required for traffic to be opened, as shown in Figure 1(D), asphalt AS is paved over the area, and work zone A is opened to traffic.

[0025] In bridge deck thickening work, it is desirable to complete all work within a work zone A, which is approximately one lane wide, in order to minimize the impact on the surrounding traffic environment, while keeping other lanes open for traffic. However, if a mixer with a standard mixing capacity is installed in the narrow work zone A and cement-based hardening agent C is to be manufactured on-site, the amount of cement-based hardening agent C that can be produced in one batch will be limited, which will prolong the construction period and lead to a decrease in quality due to the increased number of construction joints. On the other hand, if cement-based hardening agent C is manufactured in a factory and transported to the site by agitator truck or the like, it will obstruct the passage of general vehicles or cause delays in arrival due to congestion, leading to delays in construction.

[0026] Therefore, there is a need for a manufacturing and supply system and a construction system that can continuously produce the required amount of cement-based hardening material C on-site and enable continuous placement of the cement-based hardening material C. In particular, when using highly durable UHPFRC as the cement-based hardening material C, continuous production and placement are extremely important because UHPFRC takes longer to manufacture than other hardening materials and has ultra-fast hardening properties. The details of the manufacturing and supply system, construction system, and construction method of this embodiment that enable continuous production and placement of cement-based hardening material C will be described below.

[0027] [Construction System] Figure 2 is a schematic perspective view showing an example of applying the construction system 20 according to this embodiment to a deck slab top surface thickening construction. Figure 2 shows an example of restricting lane L1. The same procedure applies when restricting the other lane L2 to carry out the construction, so the explanation is omitted.

[0028] As shown in Figure 2, the construction system 20 comprises a crane device 21, a manufacturing and supply system 30, a plurality of carrier dumps 70, and a finisher device 80. The components 21, 30, 70, and 80 of the construction system 20 are arranged sequentially along the bridge axis direction Y within the lane L1 so as to fit within the work zone A that restricts the lane L1 (preferably within the lane L1).

[0029] The crane device 21 is, for example, a self-propelled rough terrain crane. Between the crane device 21 and the manufacturing and supply system 30, a material storage section 25 is provided for storing various materials of the cement-based hardening agent C. The crane device 21 takes the various materials of the cement-based hardening agent C from the material storage section 25 and supplies them to the manufacturing and supply system 30. The composition of the various materials should be determined according to the ambient temperature at the site, the road surface gradient, etc., in order to ensure the desired quality and finished product. The crane device 21 can be omitted if the vehicle that constitutes the manufacturing and supply system 30, which will be described later, is a truck equipped with a crane (for example, a truck with a crane). Furthermore, if the total amount of cement-based hardening agent C to be poured in the planned construction section during one traffic restriction is less than or equal to the capacity of each mixer device 50, 55 of the manufacturing and supply system 30, which will be described later, the crane device 21 can be omitted by pre-loading the various materials of the cement-based hardening agent C into the manufacturing and supply system 30.

[0030] The manufacturing and supply system 30 mixes various materials supplied from the crane device 21 to continuously produce cement-based hardening agent C, and continuously discharges the produced cement-based hardening agent C to the downstream carrier dump 70. The manufacturing and supply system 30 is a vehicle-mounted plant that can be driven on expressways, motorways, and general roads. By making the manufacturing and supply system 30 vehicle-mounted, it is possible to significantly reduce the time required for plant installation at the site and the time required for plant removal from the site.

[0031] Vehicle 31 is parked within work zone A such that the front and rear of the vehicle body are parallel to the bridge axis Y, and the rear of the vehicle body is facing the pouring location K where the cement-based hardening material C is poured. The cargo bed 32 of vehicle 31 is equipped with two mixer devices 50 and 55 for mixing materials to produce the cement-based hardening material C, and a belt conveyor device 60 for distributing the cement-based hardening material C produced by each mixer device 50 and 55. The manufacturing and supply system 30 achieves continuous production and continuous supply of the cement-based hardening material C by alternately producing the cement-based hardening material C with each mixer device 50 and 55 and sequentially discharging it to the belt conveyor device 60. Details of the manufacturing and supply system 30 will be described later. In the example shown in Figure 2, vehicle 31 is, for example, a large flatbed truck with a maximum load capacity of 10 tons or more. The hopper capacity is approximately 1 m³. 3 In the case of (1 cubic meter), two mixer units 50 and 55 can be installed. Also, if the vehicle 31 is, for example, a trailer towed by a tractor, the hopper capacity is approximately 1 m³. 3 It can be equipped with three mixer units 50 and 55. The hopper capacity of the mixer units 50 and 55 is approximately 0.5 m³. 3 In this case, two mixer units 50 and 55 can be mounted on the Unic truck. When using a Unic truck, the crane device 21 mentioned above is not required.

[0032] The carrier dump truck 70 comprises a crawler-type lower traveling body 71 and an upper rotating body 72 that is rotatably mounted on the lower traveling body 71. The upper rotating body 72 is equipped with a vessel 73 for receiving cement-based hardening material C and a cabin 74 for the operator to ride in. The vessel 73 is tiltably mounted on the upper rotating body 72. The carrier dump truck 70 reciprocates in the bridge axis direction Y between the manufacturing supply system 30 and the pouring location K where the cement-based hardening material C is poured.

[0033] Specifically, when the carrier dump truck 70 receives the cement-based hardening material C from the belt conveyor device 60 of the manufacturing and supply system 30 into the vessel 73, it begins to travel toward the pouring location K in front of the finisher device 80. Upon arriving at the pouring location K, the carrier dump truck 80 rotates its upper rotating body 72 by approximately 180° and tilts the vessel 73, thereby discharging the cement-based hardening material C to the pouring location K. After discharging the cement-based hardening material C, the carrier dump truck 70 travels toward the manufacturing and supply system 30 again. The carrier dump truck 70 completes this series of operations as one cycle, and by repeating this cycle, it continuously pours the cement-based hardening material C, which is continuously manufactured in the manufacturing and supply system 30, into the pouring location K.

[0034] Furthermore, the means for transporting the cement-based hardening material C from the manufacturing and supply system 30 to the pouring location K is not limited to the carrier dump 70, but can be appropriately selected according to site conditions, etc. For example, a belt conveyor device may be placed between the manufacturing and supply system 30 and the pouring location K depending on the distance between them, or the belt conveyor device 60 provided by the manufacturing and supply system 30 may be configured to extend from the loading platform 32 to the rear of the vehicle body, and the material may be transported by the belt conveyor device 60. Alternatively, a concrete pump may be placed immediately behind the belt conveyor device 60, and the cement-based hardening material C may be pumped to the pouring location K via piping connected to the concrete pump. It is also possible to transport the cement-based hardening material C using construction machinery other than the carrier dump 70.

[0035] The finisher device 80 spreads the cement-based hardening material C discharged at the pouring location K by the carrier dump 70 to a substantially flat surface. Specifically, the finisher device 80 comprises a pair of left and right crawler-type traveling bodies 81 facing each other in the direction of the road width X, a main body 82 provided on each traveling body 81 so as to be able to move up and down, a screed 83 provided at the lower part of the main body 82 capable of spreading the cement-based hardening material C, a pressing and leveling member 84 provided at the front of the main body 82 capable of pressing and leveling the cement-based hardening material C, and side covers 85 provided at both ends of the pressing and leveling member 84 to prevent the cement-based hardening material C from leaking in the direction of the road width X. Various equipment such as a generator, a distribution board for the vibrator, and an inverter for the vibrator are provided on the upper part of the main body 82.

[0036] The finisher device 80 moves sequentially in the bridge axis direction Y toward the manufacturing supply system 30. The cement-based hardening material C discharged to the pouring site K by the carrier dump 70 is compressed and leveled by the leveling member 84 and then sequentially spread by the screed 83 as the finisher device 80 moves. The cement-based hardening material C spread by the finisher device 80 is cured using a curing sheet S. When the cement-based hardening material C has hardened to the strength required for opening to traffic, the curing sheet S is removed and asphalt paving is performed on the top surface of the cement-based hardening material C to complete the construction of that site.

[0037] [Manufacturing and supply system] Next, the details of the manufacturing and supply system 30 according to this embodiment will be described based on Figures 3 to 6. Figure 3 is a schematic side view of the manufacturing and supply system 30 according to this embodiment. Figure 4 is a schematic side view showing the state when the cement-based hardening material C is discharged in the manufacturing and supply system 30 according to this embodiment. Figure 5 is a schematic rear view of the manufacturing and supply system 30 according to this embodiment.

[0038] As shown in Figure 3, the manufacturing and supply system 30 is mounted on the cargo bed 32 of the vehicle 31. In the following description, the longitudinal direction of the cargo bed 32 is referred to as the longitudinal direction of the manufacturing and supply system 30. Also, the width direction of the cargo bed 32 is referred to as the width direction of the manufacturing and supply system 30.

[0039] The manufacturing and supply system 30 includes a mixer support member 40, a scaffolding support member 45, a first mixer device 50, a second mixer device 55, and a belt conveyor device 60.

[0040] The mixer support member 40 is a support member (for example, a steel bar) for supporting the first mixer device 50 and the second mixer device 55 on the loading platform 32. Specifically, the mixer support member 40 comprises a plurality of vertical columns 41, a plurality of lower horizontal columns 42, and a plurality of upper horizontal columns 43. The lower horizontal columns 42 are placed on the upper part of the loading platform 32 in the longitudinal direction of the vehicle body. The vertical columns 41 are erected vertically from the lower horizontal columns 37. The upper horizontal columns 43 are spanned between the upper ends of the vertical columns 41 in the longitudinal direction of the vehicle body. The first hopper 51 of the first mixer device 50 is fixed to the front upper horizontal column 43 by brackets, bolts and nuts, etc. The second hopper 56 of the second mixer device 55 is fixed to the rear upper horizontal column 43 by brackets, bolts and nuts, etc.

[0041] The mixer support member 40 fixes each hopper 51, 56 to the upper horizontal support column 43 so that the height H from the ground to the upper end of each mixer device 50, 55 is within the height limit of the Road Act. In other words, the vehicle 31 is configured to be able to travel on general roads, expressways, and highways with each mixer device 50, 55 mounted on the cargo bed 32.

[0042] The scaffolding support member 45 comprises a plurality of vertical support members 46 and a plurality of horizontal support members 47. The vertical length of the vertical support members 46 is shorter than the height from the top surface of the loading platform 32 to the upper end of each mixer device 50, 55. The horizontal support members 47 are spanned between the upper ends of the vertical support members 46. Scaffolding plates (not shown) are attached to the horizontal support members 47, on which workers can stand when loading various materials of cement-based hardening agent C into each mixer device 50, 55, etc.

[0043] The first mixer device 50 comprises a first hopper 51, a first stirring member 52, and a first drive device 53. The second mixer device 55 comprises a second hopper 56, a second stirring member 57, and a second drive device 58. The first hopper 51 and the second hopper 56 are formed in the shape of bottomed boxes that open upwards. The first hopper 51 and the second hopper 56 are each provided with upper cover plates 51A and 56A that cover the upper end openings. The upper cover plates 51A and 56A are provided with cylindrical inlet openings 51B and 56B that are opened when various materials of the cement-based hardening agent C are added. The inlet openings 51B and 56B are provided with a vibrating screen device 90, which will be described in detail later.

[0044] The first hopper 51 and the second hopper 56 are curved in a convex arc shape downwards when viewed from the rear (see Figure 5). The lower end of the first hopper 51 is provided with a first discharge port 54 that opens downwards. A sliding or rotating first lid member 54A that can open and close the discharge port is attached to the first discharge port 54. Below the first discharge port 54 is a rotating first chute 54B that extends diagonally downwards. The lower end of the second hopper 56 is provided with a second discharge port 59 that opens downwards. A sliding or rotating second lid member 59A that can open and close the discharge port is attached to the second discharge port 59. Below the second discharge port 59 is a rotating second chute 59B that extends diagonally downwards. The first chute 54B and the second chute 59B are preferably made of stainless steel to allow the cement-based hardening material C to flow smoothly.

[0045] When the discharge ports 54 and 59 are closed by the cover members 54A and 59A, the cement-based hardening material C is stored in the hoppers 51 and 56. When the discharge ports 54 and 59 are opened, the cement-based hardening material C in the hoppers 51 and 56 is discharged from the discharge ports 54 and 59 towards the chutes 54B and 59B below. As shown in Figure 5, the widthwise length W of each mixer device 50 and 55 is shorter than the widthwise length of the loading platform 32, that is, each mixer device 50 and 55 is configured to fit securely within the loading platform 32. The longitudinal length of each mixer device 50 and 55 is not particularly limited, but can be set within a range that allows at least two or more mixer devices 50 and 55 to be arranged in series in the longitudinal direction of the loading platform 32.

[0046] Referring again to Figure 3, the first stirring member 52 comprises a first rotating shaft 52A and a plurality of first blade members 52B. The second stirring member 57 comprises a second rotating shaft 57A and a plurality of second blade members 57B. The first rotating shaft 52A is rotatably supported by bearings (not shown) on the side wall of the first hopper 51 such that its axis of rotation is approximately in the front-rear direction. The second rotating shaft 57A is rotatably supported by bearings (not shown) on the side wall of the second hopper 56 such that its axis of rotation is approximately in the front-rear direction. One end (for example, the front end) of the first rotating shaft 52A protrudes from the side wall of the first hopper 51. One end (for example, the front end) of the second rotating shaft 57A protrudes from the side wall of the second hopper 56. A first driven sprocket 53C is attached to the end of the first rotating shaft 52A that protrudes from the first hopper 51. A second driven sprocket 58C is attached to the end of the second rotating shaft 57A that protrudes from the second hopper 56.

[0047] The first drive unit 53 includes a first motor 53A as a power source, a drive sprocket 53B rotatably mounted integrally with the output shaft of the first motor 53A, a first driven sprocket 53C rotatably mounted integrally with the first rotating shaft 52A, and a first chain belt 53D wrapped around these sprockets 53B and 53C. The second drive unit 58 includes a second motor 58A as a power source, a second drive sprocket 58B rotatably mounted integrally with the output shaft of the second motor 58A, a second driven sprocket 58C rotatably mounted integrally with the second rotating shaft 57A, and a second chain belt 58D wrapped around these sprockets 58B and 58C. When motors 53A and 58A are driven, the rotational power of motors 53A and 58A is transmitted from drive sprockets 53B and 58B to the rotating shafts 52A and 57A via chain belts 53D and 58D and driven sprockets 53C and 58C. Although not shown in the diagram, the drive units 53 and 58 are fitted with chain covers that cover the chain belts 53D and 58D.

[0048] As the rotating shafts 52A and 57A rotate, the blade members 52B and 57B, which rotate integrally with the rotating shafts 52A and 57A, mix the various materials of the cement-based hardening agent C in the hoppers 51 and 56, thereby producing the cement-based hardening agent C. When the production of one batch of UFC is complete, the mixer devices 50 and 55 switch the lid members 54A and 59A from the closed state to the open state, thereby discharging the cement-based hardening agent C from the hoppers 51 and 56 through the discharge ports 54 and 59. In other words, the device becomes ready to produce the next batch of cement-based hardening agent C. The cement-based hardening agent C discharged into the chutes 54B and 59B is supplied to the belt conveyor device 60.

[0049] [Agitation component] Figure 6(A) is a schematic diagram of the first stirring member 52 viewed from above, and Figure 6(B) is a schematic diagram of the first stirring member 52 viewed from the direction of the rotation axis. In Figures 6(A) and 6(B), the first hopper 51 is shown with a dashed line for convenience. The first driven sprocket 53C and other components are not shown. The second stirring member 57 of the second mixer device 55 has the same configuration as the first stirring member 52, so its explanation is omitted.

[0050] As shown in Figures 6(A) and (B), the first stirring member 52 comprises a plurality of support rod members 52C (six in the illustrated example) and a plurality of first blade members 52B (twelve in the illustrated example). The support rod members 52C are provided on the first rotation shaft 52A at predetermined intervals in the direction of the rotation axis. Each support rod member 52C extends radially from the first rotation shaft 52A perpendicular to the rotation axis. Each support rod member 52C is provided with a pair (two) of first blade members 52B. Hereinafter, the first blade members 52B provided at the end of the support rod member 52C opposite to the first rotation shaft 52A will be referred to as "outer blade members 52B1", and the first blade members 52B provided between the outer blade members 52B1 and the first rotation shaft 52A will be referred to as "inner blade members 52B2".

[0051] The inner blade member 52B2 is formed in a substantially rectangular plate shape, smaller than the outer blade member 52B1. The outer blade member 52B1 is formed in a plate shape with a substantially arc-shaped peripheral edge R on its outer circumference. The curvature of the substantially arc-shaped peripheral edge R of the outer blade member 52B1 is formed to be substantially equal to the curvature of the inner circumferential surface M of the curved bottom of the first hopper 51. When the first rotation shaft 52A rotates, the outer blade member 52B1 is configured to rotate circumferentially while maintaining a minute gap between its peripheral edge R and the inner circumferential surface M of the first hopper 51. This makes it possible to mix the various materials of the cement-based hardening agent C introduced into the first hopper 51 substantially uniformly without leaving any residue at the bottom of the first hopper 51.

[0052] The outer blade member 52B1 and the inner blade member 52B2 are attached to the support rod member 52C such that their plate planes are substantially parallel to each other. As shown in Figure 6(A), the plate planes of the outer blade member 52B1 and the inner blade member 52B2 intersect with the rotation axis of the first rotation axis 52A at a predetermined angle θ (approximately 45° in the illustrated example) that is greater than 0 degrees and less than 90 degrees. In this embodiment, the rotation trajectory R1 of one longitudinal end of the outer blade member 52B1 and the rotation trajectory R2 of the other longitudinal end of the other outer blade member 52B1 adjacent in the direction of the rotation axis are configured to substantially overlap each other. This makes it possible to mix the various materials of the cement-based hardening agent C introduced into the first hopper 51 substantially uniformly over the entire length in the direction of the rotation axis. The angle θ is not particularly limited, but can be appropriately set according to the specific length of the outer wing members 52B1 such that the rotational trajectories R1 and R2 of adjacent outer wing members 52B1 substantially overlap.

[0053] Furthermore, in this embodiment, the outer blade member 52B1 and the inner blade member 52B2 attached to each support rod member 52C are arranged symmetrically with respect to a line SL extending perpendicular to the axial direction from the approximate center O in the longitudinal direction of the first rotation axis 52A (the point where the axis of the first discharge port 54 intersects with the axis of the first rotation axis 52A). That is, in the example shown in Figure 6(A), if the angle θ of the outer blade member 52B1 and the inner blade member 52B2 to the left of the center O in the figure is defined as a positive value, then the angle θ of the outer blade member 52B1 and the inner blade member 52B2 to the right of the center O in the figure is defined as a negative value. This makes it possible to effectively collect the cement-based hardening material C stirred by the outer blade member 52B1 and the inner blade member 52B2 into the first discharge port 54 located approximately in the center of the bottom of the first hopper 51. Furthermore, since it is no longer necessary to provide a slope at the bottom of the first hopper 51 toward the first discharge port 54, the height of the first hopper 51 can be effectively reduced. By reducing the height of the first hopper 51, the vertical height of the manufacturing supply system 30 can also be effectively kept below the height limit imposed by the Road Act.

[0054] [Vibrating sieve device] Figure 7 is a schematic diagram illustrating the vibrating screen device 90. The steel fibers to be mixed into the cement-based hardening material C (for example, UHPFRC) are transported to the site in a compressed state, as schematically shown by the symbol SF in Figure 7(A). Even if these compressed steel fibers SF are directly put into hoppers 51 and 56 and mixed, there is a problem in that the fibers clump together, making it difficult to mix them sufficiently. The vibrating screen device 90 is installed at the input ports 51B and 56B and functions to break up the compressed steel fibers SF before putting them into hoppers 51 and 56. The details of the vibrating screen device 90 will be described below.

[0055] As shown in Figure 7(A), the vibrating screen device 90 comprises an upper screen member 91, a lower screen member 92, and an excitation device 95. The lower screen member 92 is positioned below the upper screen member 91. The upper screen member 91 and the lower screen member 92 are integrally connected to each other by a plate material 93 or the like. The upper screen member 91 and the lower screen member 92, integrated by the plate material 93, are not fixed to the inner circumferential surface of the input ports 51B and 56B, but are placed on the eccentric cams 98 and 99 of the excitation device 95, which will be described later.

[0056] As shown in Figure 7(B), the upper sieve member 91 and the lower sieve member 92 are formed in a mesh-like structure by arranging multiple rods in a grid pattern. The spacing between the rods in the lower sieve member 92 is narrower than the spacing between the rods in the upper sieve member 91. In other words, the upper sieve member 91 is formed to have a coarser mesh than the lower sieve member 92, or to put it another way, the lower sieve member 92 is formed to have a finer mesh than the upper sieve member 91. When vibration is applied to the upper sieve member 91 and the lower sieve member 92 from the vibration excitation device 95 described later, the compressed steel fibers SF are loosened to some extent by the upper sieve member 91 and then further broken down into smaller pieces by the lower sieve member 92. When viewed from above, the upper sieve member 91 and the lower sieve member 92 are preferably arranged so that the rods intersect each other at an angle of approximately 45 degrees.

[0057] The outer diameters of the upper sieve member 91 and the lower sieve member 92 are smaller than the inner diameters of the input ports 51B and 56B. That is, as shown in Figure 7(A), a clearance C is secured between the outer circumferences of the upper sieve member 91 and the lower sieve member 92 and the inner circumferences of the input ports 51B and 56B. As a result, when vibration is applied to the upper sieve member 91 and the lower sieve member 92 from the vibration device 95, the upper sieve member 91 and the lower sieve member 92 oscillate without interfering with the inner circumferences of the input ports 51B and 56B.

[0058] As shown in Figure 7(A), the vibration device 95 comprises a motor 96 as a drive source that outputs rotational power, a rod 97 that rotates by the power of the motor 96, and a pair of eccentric cams 98 and 99. The motor 96 is located outside the input ports 51B and 56B. The motor 96 is driven by power supplied from, for example, a power supply device (not shown). The motor 96 may be driven by another drive source such as an engine.

[0059] The rod 97 is formed to be longer than the diameters of the upper sieve member 91 and the lower sieve member 92. The rod 97 extends below the lower sieve member 92 in the diametrical direction of the input ports 51B and 56B. One end of the rod 97 is fixed to the output shaft of the motor 96. The other end of the rod 97 is located below the outer circumference of the lower sieve member 92.

[0060] The eccentric cams 98 and 99 are mounted on the rod 97 so as to be rotatable as an integral part of the rod. The eccentric cams 98 and 99 face each other radially on the lower sieve member 92, straddling the center of the lower sieve member 92. The eccentric cams 98 and 99 abut against the lower surface on the outer circumference of the lower sieve member 92. The eccentric cams 98 and 99 are fixed to the rod 97 such that they are out of phase with each other (preferably, out of phase by 180 degrees). When the motor 96 is driven, the eccentric cams 98 and 99, which rotate integrally with the rod 97, cause the lower sieve member 92 to move substantially vertically in conjunction with the upper sieve member 91.

[0061] By the way, if the upper sieve member 91 and the lower sieve member 92 are partially fixed to the inner circumferential surface of the input ports 51B and 56B and vibrated, the vibration frequency becomes approximately constant, making it impossible to efficiently separate the compressed steel fibers SF. In this embodiment, the upper sieve member 91 and the lower sieve member 92, which are integrated by the plate material 93, are not fixed but are placed on the eccentric cams 98 and 99. That is, when the motor 96 is driven to rotate the eccentric cams 98 and 99, the upper sieve member 91 and the lower sieve member 92 are configured to vibrate approximately up and down randomly without a constant vibration frequency. This makes it possible to effectively separate the compressed steel fibers SF. Furthermore, since the compressed steel fibers SF can be separated early, it is possible to effectively shorten the manufacturing time of the cement-based hardening material C (e.g., UHPFRC) and effectively prevent quality defects.

[0062] [Belt conveyor system] Referring again to Figure 3, the belt conveyor device 60 comprises a base portion 61 that can slide along the loading platform 32 in the front-rear direction of the vehicle body, a drive pulley 62 provided on the front end side of the base portion 61, a drive motor 63 configured to transmit rotational force to the drive pulley 62, a driven pulley 64 provided on the rear end side of the base portion 61, an endless conveyor belt 65 wrapped around the drive pulley 62 and the driven pulley 64, and a plurality of support members 66 arranged at predetermined intervals in the front-rear direction of the vehicle body to support the conveyor belt 65. Reference numeral 61A in Figure 3 indicates a wheel that supports the base portion 61 so as to be slidable on the loading platform 32.

[0063] The length of the belt conveyor device 60 in the longitudinal direction is shorter than the length of the cargo bed 32 in the longitudinal direction of the vehicle body. The belt conveyor device 60 is configured to be housed on the cargo bed 32 when the vehicle 30 is traveling on public roads, etc. As shown in Figure 4, when discharging the cement-based hardening material C to the carrier dump 70, the base portion 61 is slid to the rear of the vehicle body, causing the conveyor belt 65 to protrude to the rear of the vehicle body. The cement-based hardening material C discharged onto the conveyor belt 75 from the chutes 54B and 59B is continuously discharged from the rear end of the conveyor belt 65 to the carrier dump 70 below.

[0064] In this embodiment, the belt conveyor device 60 is positioned diagonally downward relative to the hoppers 51 and 56 (see Figure 5). By positioning the belt conveyor device 60 diagonally downward in this way, it is possible to effectively reduce the overall vertical height of the manufacturing supply system 30 compared to, for example, positioning the belt conveyor device 60 directly below the hoppers 51 and 56. However, this disclosure does not preclude positioning the belt conveyor device 60 directly below the hoppers 51 and 56 depending on their height and capacity.

[0065] Alternatively, the cement-based hardening material C produced by each mixer device 50, 55 could be flowed from each chute 54B, 59B in the width direction (lateral direction) of the vehicle body and discharged to the carrier dump 70. However, in this case, the carrier dump 70 would have to be positioned alongside the loading platform 32, raising concerns that work could not be performed within the narrow work area A. In this embodiment, the cement-based hardening material C is discharged from the rear of the vehicle body to the carrier dump 70 by the belt conveyor device 60, making it possible to reliably perform work even within the narrow work area A.

[0066] Furthermore, it is conceivable that the cement-based hardening material C produced by each mixer device 50, 55 could be discharged via a ramp or the like extending in the longitudinal direction of the vehicle body. However, in this case, the ramp would need to be inclined, raising concerns that the entire manufacturing and supply system 30 would have to be expanded vertically. In this embodiment, since a belt conveyor device 60 is used, an inclination is not required, and such vertical expansion can be prevented. In addition, by discharging the cement-based hardening material C via the belt conveyor device 60, the cement-based hardening material C can be delivered more quickly compared to when a ramp or the like is used. In particular, when using UHPFRC with ultra-fast hardening properties as the cement-based hardening material C, the time from completion of manufacturing to placement is limited, making it possible to achieve an even more significant effect.

[0067] Furthermore, the technology disclosed herein does not preclude the use of a ramp for the discharge of the cement-based hardening material C from the vehicle 30. For example, depending on the length of the cargo bed 32 in the front-rear direction, it is possible to use a ramp. In this case, it is desirable that the ramp be made of stainless steel or the like to allow the cement-based hardening material C to flow smoothly. In addition, the technology disclosed herein also allows for the discharge of the cement-based hardening material C by means of other configurations other than the belt conveyor device 60 or a ramp, such as by extending the chutes 54B and 59B.

[0068] [Manufacturing process] Next, the manufacturing process of the cement-based hardening material C using the manufacturing and supply system 30 according to this embodiment will be described based on Figure 8. In the following description, the first batch will be manufactured using the first mixer device 50, but it is also possible to manufacture the first batch using the second mixer device 55.

[0069] As shown in Figure 8(A), in the first step, the production of the first batch of cement-based hardening material C is started by putting various materials for the cement-based hardening material C into the first hopper 51 of the first mixer device 50 and mixing them.

[0070] As shown in Figure 8(B), in the second step, the production of the next batch of cement-based hardening agent C begins by adding various materials for the cement-based hardening agent C to the second hopper 56 of the second mixer device 55 and mixing them. Also in the second step, the discharge of the cement-based hardening agent C produced by the first mixer device 50 to the belt conveyor device 60 begins. The addition of various materials for the cement-based hardening agent C to the second hopper 56 should begin no later than when the mixing of the various materials by the second mixer device 55 is completed (i.e., the production of the cement-based hardening agent C is completed), before the entire amount of cement-based hardening agent C has been discharged from the first mixer device 50 to the belt conveyor device 60.

[0071] As shown in Figure 8(C), once the entire amount of cement-based hardening material C from the first mixer device 50 has been discharged to the belt conveyor device 60, the third step begins by discharging the cement-based hardening material C from the second mixer device 55 to the belt conveyor device 60. This ensures a continuous supply of cement-based hardening material C.

[0072] As shown in Figure 8(D), in the fourth step, the various materials for the cement-based hardening agent C are again put into the first hopper 51 of the first mixer device 50 and mixed to start the production of successive batches of cement-based hardening agent C. The fourth step should be started no later than the time when the mixing of the various materials by the first mixer device 50 is completed (i.e., the production of cement-based hardening agent C is completed), before the entire amount of cement-based hardening agent C is discharged from the second mixer device 55 to the belt conveyor device 60 in the third step. Thereafter, each of the above steps is repeated until the cement-based hardening agent C is poured into all the pouring locations in the planned construction section. This enables the continuous production of cement-based hardening agent C by each mixer device 50, 55 and the continuous supply of cement-based hardening agent C by the belt conveyor device 60.

[0073] [Construction method] Next, the flow (construction method) of the floor slab upper surface thickening work using the construction system 20 according to this embodiment will be explained based on Figures 9 to 12. Note that the work of chipping away and removing the deteriorated upper layer of the existing floor slab 10 will be omitted from the explanation below.

[0074] [First construction method] Figure 9 is a schematic top view illustrating the first construction method. As shown in Figure 9(A), once cones, temporary protective fences, etc. (not shown) are set up between lanes L1 and L2 and lane L1 is restricted, the crane device 21, the manufacturing and supply system 30, the carrier dump 70, and the finisher device 80 are arranged in series in the bridge axis direction within work zone A. Once the devices 21, 30, 70, and 80 of the construction system 20 are positioned at the desired locations within work zone A, the continuous production of the cement-based hardening material C is started by using the crane device 21 to feed the various materials of the cement-based hardening material C into the manufacturing and supply system 30. If the total amount of cement-based hardening material C to be poured into the planned construction section during one traffic restriction is less than or equal to the capacity of the mixer devices 50, 55 (2 batches) of the manufacturing and supply system 30, the crane device 21 may be omitted by pre-loading the various materials of the cement-based hardening material C into the manufacturing and supply system 30. Furthermore, if the total amount of cement-based hardening material C to be poured is relatively small and the vehicle 31 can be handled by a crane truck, the crane device 21 may be omitted.

[0075] Once the manufacturing of the first batch of cement-based hardening material C by the manufacturing and supply system 30 is complete, as shown in Figure 9(B), the continuous supply of cement-based hardening material C by the manufacturing and supply system 30, the continuous transport and placement of cement-based hardening material C by the carrier dump 70, and the spreading of cement-based hardening material C by the finisher device 80 are started. The cement-based hardening material C spread by the finisher device 80 is then cured with a sheet S. Once the cement-based hardening material C has hardened to the strength required for opening to traffic, as shown in Figure 9(C), the asphalt pavement AS is constructed sequentially using construction machinery not shown.

[0076] As shown in Figure 9(D), once the cement-based hardening agent C has been poured and leveled over the entire planned construction section, the crane device 21, manufacturing system 30, carrier dump 70, and finisher device 80 will be removed from work zone A. Finally, once the poured cement-based hardening agent C has hardened to the strength required for traffic opening by sheet curing S, the entire construction section will be opened to traffic by applying asphalt paving AS.

[0077] [Second construction method] Figure 10 is a schematic top view illustrating the second construction method. In the second construction method, instead of the carrier dump 70 used in the first construction method, a conveying belt conveyor device 70 is used as the conveying means. _1 Specifically, as shown in Figure 10(A), a conveying belt device 70 is used between the manufacturing supply system 30 in work zone A and the casting location K. _1 Position them along the bridge axis.

[0078] Once the manufacturing of the first batch of cement-based hardening material C by the manufacturing and supply system 30 is complete, the manufacturing and supply system 30 will continue to supply the cement-based hardening material C, as shown in Figure 10(B), and the conveying belt device 70 will begin supplying the material. _1 The continuous transport and placement of the cement-based hardening material C by the finisher device 80 is initiated, and the spreading of the cement-based hardening material C by the finisher device 80 is started. The cement-based hardening material C spread by the finisher device 80 is cured with a sheet S, and once it has hardened to the strength required for opening to traffic, the asphalt pavement AS is constructed sequentially as shown in Figure 10(C). As shown in Figures 10(B) and 10(C), as the placement location K approaches the manufacturing supply system 30, the transport belt conveyor device 70 _1 You can shorten it as needed.

[0079] As shown in Figure 10(D), once the cement-based hardening agent C has been poured and leveled over the entire planned construction section, the crane device 21, manufacturing system 30, and conveying belt conveyor device 70 will be accessible from work zone A. _1and the finisher device 80 is removed. Once the finally placed cement-based hardening material C has hardened to the strength required for traffic opening through sheet curing S, asphalt paving AS is performed, thereby fully opening the construction section to traffic.

[0080] [Third Construction Method] Fig. 11 is a schematic top view for explaining the third construction method. In the third construction method, instead of the carrier dump 70 used in the first construction method, a concrete pump 70 is used as a conveying means _2 is used. Specifically, as shown in Fig. 10(A), the concrete pump 70 is placed immediately behind the manufacturing and supply system 30 in the work zone A _2 is arranged. At this time, for the concrete pump 70 _2 it is preferable to arrange the hopper HP below the belt conveyor device 60 of the manufacturing and supply system 30. For the concrete pump 70 _2 the discharge port is connected to a placing pipe 70 extending to the placing position K _3 is connected. Note that a storage hopper for storing the cement-based hardening material C while kneading it may be interposed between the manufacturing and supply system 30 and the concrete pump 70 _2 .

[0081] When the production of the first batch of cement-based hardening material C by the manufacturing and supply system 30 is completed, as shown in Fig. 11(B), continuous supply of the cement-based hardening material C by the manufacturing and supply system 30, and the concrete pump 70 _2 continuous pressure feeding and placing of the cement-based hardening material C by means of, and leveling of the cement-based hardening material C by the finisher device 80 are started. The cement-based hardening material C leveled by the finisher device 80 is subjected to sheet curing S, and once it has hardened to the strength required for traffic opening, asphalt paving AS is sequentially constructed as shown in Fig. 10(C). As shown in Fig. 10(B) and Fig. 10(C), as the placing position K approaches the manufacturing and supply system 30, the placing pipe 70 _3 may be shortened as appropriate.

[0082] As shown in Figure 11(D), once the cement-based hardening agent C has been poured and leveled over the entire planned construction section, the crane device 21, manufacturing system 30, and concrete pump 70 will be used from work zone A. _2 Then, the finisher device 80 is removed. Finally, once the cement-based hardening material C that was poured has hardened to the strength necessary for opening the road to traffic by sheet curing S, the entire construction section is opened to traffic by applying asphalt paving AS.

[0083] [Fourth construction method] Figure 12 is a schematic top view illustrating the fourth construction method. The fourth construction method is used when the planned construction section for a single traffic restriction is relatively long. As shown in Figure 12(A), a crane device 21, a manufacturing and supply system 30, a carrier dump 70, and a finisher device 80 are arranged in series in the bridge axis direction within work zone A. Once the devices 21, 30, 70, and 80 of the construction system 20 are positioned at the desired locations within work zone A, the continuous production of the cement-based hardening material C is started by feeding various materials of the cement-based hardening material C into the manufacturing and supply system 30 using the crane device 21.

[0084] In this case, if ultrafast-setting UHPFRC is used as the cement-based hardening agent C, if the distance from the manufacturing and supply system 30 to the placement site K is too long, there is a possibility that the cement-based hardening agent C will begin to harden while being transported by the carrier dump 70. For this reason, it is desirable to set the distance from the manufacturing and supply system 30 to the placement site K to a distance that prevents the cement-based hardening agent C from starting to harden while being transported, depending on the environmental conditions of the site.

[0085] Once the manufacturing of the first batch of cement-based hardening material C by the manufacturing and supply system 30 is complete, the manufacturing and supply system 30 will continue to supply the cement-based hardening material C, as shown in Figure 12(B), and the concrete pump 70 _2Continuous pumping and placement of the cement-based hardening material C by the crane and the spreading of the cement-based hardening material C by the finisher device 80 are initiated. As shown in Figure 12(C), when the placement location K approaches the manufacturing supply system 30, the crane device 21 and the manufacturing supply system 30 are moved forward within the work zone A. In this embodiment, the manufacturing supply system 30 is vehicle-mounted and can be easily moved. The manufacturing of the cement-based hardening material C can be continued even while the manufacturing supply system 30 is being moved. The movement of the crane device 21 and the manufacturing supply system 30 can be repeated as needed until the cement-based hardening material C is placed in the planned construction section.

[0086] As shown in Figure 12(D), once the cement-based hardening material C has been poured and leveled over the entire planned construction section, the crane device 21, manufacturing system 30, carrier dump 70, and finisher device 80 are removed from work zone A. Finally, once the poured cement-based hardening material C has hardened to the strength required for traffic opening by sheet curing S, the entire construction section is opened to traffic by asphalt paving AS. Although the explanation with drawings is omitted, in the fourth construction method, as with the second or third construction method, a conveying belt device 70 is used instead of the carrier dump 70. _1 or concrete pump 70 _2 It is possible to use this.

[0087] As described in detail above, this embodiment allows for the continuous production of cement-based hardening material C by alternately manufacturing it using two mixer devices 50 and 55, and the manufactured cement-based hardening material C is continuously supplied to the carrier dump 70 by a belt conveyor device 60. This effectively increases the amount of cement-based hardening material C that can be poured per unit time. Furthermore, because the cement-based hardening material C can be continuously produced and poured, construction joints can be minimized, enabling high-quality construction. In particular, these effects become even more pronounced when UHPFRC is used as the cement-based hardening material C.

[0088] Furthermore, the manufacturing and supply system 30 is mounted on the cargo bed 32 of the vehicle 31, and is configured to allow the vehicle 31 to be parked within a one-lane restricted area and the cement-based hardening material C to be manufactured directly on-site. This eliminates the need to transport the cement-based hardening material C from the factory to the site by agitator vehicles or the like, effectively preventing obstruction of general traffic or delays in construction due to congestion. In addition, by mounting the manufacturing and supply system 30 on the vehicle 31, the manufacturing and supply system 30 can be easily removed from the site after the construction is completed, enabling early reopening of traffic.

[0089] [others] Furthermore, this disclosure is not limited to the embodiments described above, and can be modified and implemented as appropriate without departing from the spirit of this disclosure.

[0090] For example, in the above embodiment, UHPFRC was used as an example of the cement-based hardening material C, but it can also be applied to other cement-based hardening materials such as steel fiber reinforced concrete. Furthermore, in the above embodiment, the manufacturing and supply system 30 was described as having two mixer devices 50 and 55, but it is possible to have three or more devices, as long as they can be installed on the loading platform 32.

[0091] Furthermore, in the above embodiment, the example given was that the deck slab thickening work is carried out by restricting one lane, but the manufacturing and supply system 30 of this embodiment can be installed if a width of approximately 3.5m can be secured. For this reason, in the case of road bridges with wide shoulders, it is possible to carry out the work without restricting lanes. In addition, in the above embodiment, the manufacturing and supply system 30 was described as discharging the manufactured cement-based hardening material C from the rear of the vehicle body, but in cases where the width of one lane is wide or the adjacent shoulder is wide, it is also possible to configure the system to discharge the cement-based hardening material C from the side of the vehicle body. In this case, each mixer device 50, 55 should be mounted on the loading platform 32 so that the rotating shafts 52A, 57A are in the direction of the vehicle body width, and the cement-based hardening material C should be discharged from the side of the vehicle body by chutes 54B, 59B.

[0092] Furthermore, although the above embodiments show examples in which only one manufacturing and supply system 30 is used in each of the first to fourth construction methods, it is also possible to place multiple manufacturing and supply systems 30 in a work zone A that is the size of one lane. In this case, the manufacturing and supply systems 30 that have completed the manufacturing and supply of the cement-based hardening material C can be sequentially removed from the site by the vehicle 1 driving itself. Alternatively, in the first to fourth construction methods, multiple manufacturing and supply systems 30 may be sequentially replaced at the site. In this case as well, since the total amount of cement-based hardening material C that can be manufactured by one manufacturing and supply system 30 is greater than that of an agitator truck, it is possible to effectively reduce the frequency of transportation to the site compared to when an agitator truck is used. Furthermore, although the above embodiment described the manufacturing supply system 30 as a vehicle-mounted type installed on the cargo bed 32 of the vehicle 31, it is also possible to configure the system by installing the mixer devices 50, 55 and the belt conveyor device 60 on a base frame that can be mounted on the cargo bed 32, and then lowering and installing the base frame, which integrates the mixer devices 50, 55 and the belt conveyor device 60, at the site using a crane device 21 or the like.

[0093] Furthermore, the manufacturing and supply system 30 of this disclosure is not limited to the repair and reinforcement of existing bridge decks, but can be broadly applied to the repair, reinforcement, and renewal work of other concrete structures. In addition, the application of the manufacturing and supply system 30 of this disclosure is not limited to the manufacture of cement-based hardening materials, but can be broadly applied to the manufacture of cement-based compositions. [Explanation of symbols]

[0094] 1...Bridge, C...Cement-based hardening material, A...Work zone, L1, L2...Lane, 10...Existing deck slab, 15...Main girder, 20...Construction system, 21...Crane device, 25...Material storage area, 30...Manufacturing and supply system, 31...Vehicle, 32...Cargo bed, 40...Support member for mixer, 45...Support member for scaffolding, 50...First mixer device, 51...First hopper, 52...First stirring member, 52A...First rotating shaft, 52B...First blade member, 53...First drive unit, 54...First discharge port, 54B...First chute, 55...Second mixer unit, 56...Second hopper, 57...Second stirring member, 57A...Second rotating shaft, 58...Second drive unit, 59...Second discharge port, 59B...Second chute, 60...Belt conveyor unit, 61...Base unit, 62...Drive pulley, 63...Drive motor, 64...Driven pulley, 65...Conveyor belt, 70...Carrier dump, 70 _1 ...Conveyor belt device, 70 _2 ...concrete pump, 70 _3 ...Casting pipe, 80...Finisher device, 90...Vibrating screen device, 91...Upper screen member, 92...Lower screen member, 95...Excitation device, 96...Motor, 97...Rod, 98, 99...Eccentric cam

Claims

1. A mixer apparatus for producing a cement-based composition containing a cement-based hardening agent, A hopper into which the materials of the cement-based composition are introduced, A stirring means including a rotating shaft rotatably mounted on the hopper, and a plurality of blade members integrally rotatably mounted on the rotating shaft for stirring the material in the hopper, The hopper is provided with a discharge port on the bottom side for discharging the cement-based composition, which is manufactured by stirring with the blade member, from inside the hopper. The plurality of blade members include at least one first blade member provided on one side of the discharge port and at least one second blade member provided on the other side. The first blade member and the second blade member are configured to rotate integrally with the rotating shaft, thereby collecting the cement-based composition in the hopper towards the discharge port. A mixer device characterized by the following:

2. A mixer apparatus according to claim 1, The first blade member and the second blade member are configured to intersect each other at different angles with respect to the rotation axis of the rotation shaft. A mixer device characterized by the following:

3. A mixer apparatus according to claim 1, If we define the angle of one side with respect to the axis of rotation as a positive value, and the angle of the other side with respect to the axis of rotation as a negative value, The first angle at which the plane of the first blade member intersects with the axis of rotation is a positive value, and the second angle at which the plane of the second blade member intersects with the axis of rotation is a negative value with the same absolute value as the first angle. A mixer device characterized by the following:

4. A mixer apparatus according to claim 1, The rotational trajectory of one end of the blade member is configured to overlap with the rotational trajectory of the other end of another blade member adjacent to it in the direction of the rotation axis of the rotation shaft. A mixer device characterized by the following:

5. A mixer apparatus according to claim 1, The bottom of the hopper is formed in an arc shape that curves downwards, The multiple blade members are formed in a plate shape with an arc-shaped periphery on the outer circumference, and are configured to rotate integrally with the rotating shaft while maintaining a minute gap between the periphery and the inner circumferential surface on the bottom side of the hopper. A mixer device characterized by the following:

6. A mixer apparatus according to claim 1, A cylindrical opening is provided at the top of the hopper for introducing the material into the hopper, The system further comprises a vibrating screen device provided at the input port, which applies vibration to the material being fed into the input port in a compressed state, thereby breaking down the compressed material. A mixer device characterized by the following:

7. A mixer apparatus according to claim 6, The vibrating screen device comprises a mesh-like screen member in which a plurality of rods are arranged in a grid pattern, and an excitation device that applies vibration to the screen member to cause it to move up and down. A mixer device characterized by the following:

8. A mixer apparatus according to claim 7, The sieving member comprises an upper sieving member positioned above, and a lower sieving member positioned below the upper sieving member and having a finer mesh than the upper sieving member. A mixer device characterized by the following:

9. A mixer apparatus according to claim 7, The vibration excitation device includes a drive source, a rod that rotates by rotational power output from the drive source, and an eccentric cam that is rotatably mounted integrally with the rod and on which the sieve member is mounted, and is configured such that the sieve member moves randomly up and down as the eccentric cam rotates. A mixer device characterized by the following:

Images