Fiber material spreading device and method for manufacturing concrete structure

Abstract

To provide a fiber material scattering device in which a fiber material is uniformly scattered over the surface layer part of installed concrete before solidification to efficiently produce a concrete structure in which the fiber material is buried in the surface layer part, and a concrete structure production method.SOLUTION: A fiber material scattering device 1 in which a boy part 2 is provided with: a storage part 3 to be stored with a fiber material 60; and an exhaust port 4 from which the fiber material 60 stored in the storage part 3 is exhausted, and a wheel 6 is connected to the body part 2 is moved on a surface layer part 51a of installed concrete 51 before solidification. Then, the fiber material 60 is scattered on the surface layer part 51a by rolling the wheel 6 on the surface layer part 51a and using a scattering amount adjustment mechanism 8 adjusting the scattering amount of the fiber material 60 exhausted from the exhaust port 4 in conjunction with the rotation of the wheel 6 to the desired amount. In this way, a concrete structure 50 in which the fiber material 60 is buried in the surface layer part 51a is produced.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fiber material spraying device and a method for manufacturing a concrete structure. More specifically, the present invention relates to a fiber material spraying device and a method for manufacturing a concrete structure that can efficiently manufacture a concrete structure in which a fiber material is embedded in the surface layer portion by uniformly spraying the fiber material on the surface layer portion of the placed and non-solidified concrete.

Background Art

[0002] A construction method is known in which the durability of a concrete structure against tension is enhanced by embedding a large number of fine fiber materials (short fibers) in concrete (for example, see Patent Document 1). Conventionally, the fiber material is put into the drum of an agitator truck that transports fresh concrete (hereinafter referred to as fresh concrete), and the fresh concrete and the fiber material are mixed by rotating the drum at high speed. Then, the fresh concrete mixed with the fiber material is placed and solidified to manufacture a concrete structure in which the fiber material is embedded throughout.

[0003] However, in this manufacturing method, the fiber material is also embedded in unnecessary portions of the concrete structure, which is uneconomical. Further, after the placing operation, the fiber material adheres to and remains in the drum of the agitator truck, so that a great deal of labor is required for cleaning the drum, and the amount of treated water generated after cleaning also increases. There is a problem that a great deal of time and cost are required to dispose of the remaining concrete mixed with the fiber material.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The object of the present invention is to provide a fiber material spreading device and a method for manufacturing a concrete structure that can efficiently produce a concrete structure in which fiber material is embedded in the surface layer by uniformly scattering fiber material onto the surface layer of concrete before it has been poured and hardened. [Means for solving the problem]

[0006] To achieve the above objective, the present invention provides a fiber material spreading device for spreading fiber material on the surface layer of concrete that has been poured and is not yet hardened, comprising: a main body having a storage section for containing the fiber material and a discharge port from which the fiber material contained in the storage section is discharged; wheels connected to the main body and rolling on the surface layer; and a spreading amount adjustment mechanism that adjusts the amount of fiber material discharged from the discharge port to a desired amount in conjunction with the rotation of the wheels, wherein the spreading amount adjustment mechanism the whole The wheel is positioned above the discharge port and within the internal cavity of the main body, and the wheel is positioned outside the area through which the discharge port passes when viewed from above. Furthermore, the main body and the spray volume adjustment mechanism are separate components. It is characterized by the following: Another fiber material scattering device of the present invention is a fiber material scattering device for scattering fiber material onto the surface layer of concrete that has been poured and is not yet hardened, wherein the fiber material is contained Having an interior space The apparatus comprises a main body having a storage section and a discharge port from which the fiber material stored in the storage section is discharged, a wheel connected to the main body and rolling on the surface, and a dispensing amount adjustment mechanism that adjusts the amount of fiber material discharged from the discharge port to a desired amount in conjunction with the rotation of the wheel, wherein the dispensing amount adjustment mechanism, The loosening mechanism for the fiber material includes a swinging part separate from the housing part, the swinging part being located in the internal space of the housing part and configured to swing back and forth relative to the inner wall of the housing part. Characterized by 。 A further fiber material spreading device of the present invention is a fiber material spreading device for spreading fiber material on the surface layer of concrete that has been poured and is not yet hardened, comprising: a main body having a storage section for containing the fiber material and a discharge port from which the fiber material contained in the storage section is discharged; a wheel connected to the main body and rolling on the surface layer; and a spreading amount adjustment mechanism that adjusts the amount of fiber material discharged from the discharge port to a desired amount in conjunction with the rotation of the wheel, wherein the spreading amount adjustment mechanism comprises an intermediate opening provided between the upper and lower parts of the storage section and the discharge port, and a switching mechanism that switches between an open state and a closed state of the intermediate opening in conjunction with the rotation of the wheel, The aforementioned A vane that rotates in conjunction with the rotation of the wheel and loosens the fiber material that has passed through the intermediate opening. The entire impeller is positioned between the intermediate opening and the discharge port. It is characterized by the following: A further fiber material spreading device of the present invention is a fiber material spreading device for spreading fiber material on the surface layer of concrete that has been poured and is not yet hardened, comprising: a main body having a storage section for containing the fiber material and a discharge port from which the fiber material contained in the storage section is discharged; wheels connected to the main body and rolling on the surface layer; a spreading amount adjustment mechanism that adjusts the amount of fiber material discharged from the discharge port to a desired amount in conjunction with the rotation of the wheels; and a pressing mechanism that presses the fiber material discharged from the discharge port toward the surface layer. When scattering the aforementioned fibrous material, The pressing mechanism is characterized in that, when viewed from above, it is positioned behind the discharge port and within the range through which the discharge port passes. A further fiber material spreading device of the present invention is a fiber material spreading device for spreading fiber material on the surface layer of concrete that has been poured and is not yet hardened, and is characterized in that it comprises a main body having a storage section for containing the fiber material and a discharge port from which the fiber material contained in the storage section is discharged, a wheel connected to the main body and rolling on the surface layer, a spreading amount adjustment mechanism that adjusts the amount of fiber material discharged from the discharge port to a desired amount in conjunction with the rotation of the wheel, and a handle, wherein the wheel is positioned at the rear of the main body, the front end of the discharge port is positioned in front of the front end of the wheel, and the position of the handle can be changed between a state in which it extends behind the front end of the discharge port and a state in which it extends in front of the front end of the discharge port.

[0007] The method for manufacturing a concrete structure according to the present invention is: Using the fiber material spreading device described in any of the above, On the surface The aforementioned Method for manufacturing concrete structures with embedded fiber material The fiber material scattering device is Move the wheels over the surface layer of the poured, unhardened concrete, causing them to roll on the surface layer, The amount of the fibrous material discharged from the outlet is adjusted to a desired amount by the aforementioned dispensing amount adjustment mechanism, The method is characterized by scattering the fibrous material onto the surface layer. [Effects of the Invention]

[0008] According to the present invention, by simply moving the fiber material spreading device over the surface layer of concrete before it has solidified and rolling the wheels, the desired amount of fiber material is discharged from the discharge port by the spreading amount adjustment mechanism in conjunction with the rotation of the wheels. Therefore, regardless of the operator's skill, the fiber material can be uniformly spread over the surface layer of the concrete, and concrete structures with fiber material embedded in the surface layer can be efficiently manufactured. [Brief explanation of the drawing]

[0009] [Figure 1] This is an explanatory diagram illustrating, in a side view, the situation in which a fibrous material is scattered on the surface layer of concrete using a fibrous material scattering device according to an embodiment of the present invention. [Figure 2] Figure 1 is an explanatory diagram illustrating the internal structure of the fiber material dispensing device in a longitudinal cross-sectional view. [Figure 3] This is a view from arrow A in Figure 2. [Figure 4] This is a cross-sectional view of BB as seen through the arrow in Figure 2. [Figure 5] Figure 2 is an explanatory diagram illustrating the internal structure of the fiber material dispersing device in a longitudinal cross-sectional view after it has moved a predetermined distance. [Figure 6] This is an explanatory diagram illustrating, in a side view, a situation in which a fibrous material scattering device according to another embodiment of the present invention is being towed and fibrous material is being scattered onto the surface layer of concrete. [Figure 7] Figure 6 is an explanatory diagram illustrating, from a side view, the situation in which the fiber material spreading device is pushed to spread the fiber material onto the surface layer of concrete. [Figure 8]An explanatory diagram illustrating, in side view, a situation where a fiber material spraying device according to yet another embodiment of the present invention is used to spray a fiber material onto the surface layer portion of concrete. [Figure 9] An explanatory diagram illustrating, in longitudinal cross-sectional view, a situation where a fiber material spraying device according to yet another embodiment of the present invention is used to spray a fiber material onto the surface layer portion of concrete. [Figure 10] An explanatory diagram illustrating, in longitudinal cross-sectional view, a state where the fiber material spraying device of FIG. 9 has moved a predetermined distance.

Mode for Carrying Out the Invention

[0010] Hereinafter, the fiber material spraying device of the present invention and the method for manufacturing a concrete structure will be described based on the embodiments shown in the drawings.

[0011] As shown in FIG. 1, in the present invention, a fiber material 60 is sprayed onto the surface layer portion 51a of the freshly placed and non-solidified concrete 51 using a fiber material spraying device 1, and a concrete structure 50 in which the fiber material 60 is embedded in the surface layer portion 51a is manufactured. The surface layer portion 51a referred to here is, for example, in the range of a depth of about 0 mm to 200 mm with respect to the surface of the placed concrete 51. In this embodiment, an example is given of manufacturing a slab of a reinforced concrete structure in which reinforcing bars 52 are arranged as the concrete structure 50. Hereinafter, the direction in which the fiber material spraying device 1 is moved during spraying of the fiber material 60 will be referred to as the front-rear direction, and the direction horizontally orthogonal to the front-rear direction will be referred to as the left-right direction for explanation.

[0012] The fiber material 60 is fine short fiber with a thickness (width, diameter) of about 0.3 mm to 1.5 mm and a length of about 10 mm to 50 mm. Although the fiber material 60 is schematically shown large in the drawing, the actual fiber material 60 is very fine, and the fiber materials 60 are likely to be entangled with each other and form lumps. As the fiber material 60, for example, polypropylene fiber, vinylon fiber, polyethylene fiber, aramid fiber, etc. formed of resin are used. In addition, as the fiber material 60, for example, steel fiber, carbon fiber, glass fiber, etc. may also be used. By embedding a large number of fiber materials 60 in the surface layer portion 51a of the concrete 51, the expansion of cracks in the concrete 51 is suppressed by the fiber reinforcement effect of the fiber materials 60, and the durability of the concrete structure 50 against tension is improved.

[0013] As illustrated in FIG. 1, the fiber material spraying device 1 includes a main body portion 2 having an inner cavity, wheels 6 connected to the main body portion 2, and a spraying amount adjusting mechanism 8 provided in the inner cavity of the main body portion 2. As illustrated in FIGS. 2 to 4, the main body portion 2 is configured to have a casing having an inner cavity, and has a storage portion 3 for storing the fiber material 60 and a discharge port 4 for discharging the fiber material 60 stored in the storage portion 3. The storage portion 3 is provided at the upper part of the main body portion 2, and the discharge port 4 is provided below the storage portion 3. In this embodiment, a hopper 3a is provided as the storage portion 3 at the upper part of the main body portion 2, and the fiber material 60 is introduced into the inner cavity of the main body portion 2 from the inlet 3b of the hopper 3a.

[0014] A frame portion 2a extending forward is provided at the front portion of the main body portion 2, and a pair of left and right wheels 6 are rotatably connected to the front portion of the frame portion 2a via an axle 5. The wheels 6 are, for example, composed of rubber tires. The pair of wheels 6 are arranged outside the main body portion 2. A handle 7 is connected to the front portion of the frame portion 2a. The handle 7 is configured to be able to change the height position vertically. By an operator pulling the fiber material spraying device 1 with the handle 7, the pair of wheels 6 roll on the surface layer portion 51a of the un固化前の concrete 51 that has been placed.

[0015] When the wheel 6 rolls over the concrete 51 before it hardens, the wheel 6 sinks about 5mm to 20mm below the surface of the concrete 51. Therefore, the discharge port 4 should be positioned about 50mm to 200mm higher than the lower end surface of the wheel 6. The surface of the wheel 6 that contacts the concrete 51 (the running surface) should be designed to prevent concrete 51 and fibrous material 60 from adhering to it.

[0016] The spreading amount adjustment mechanism 8 adjusts the amount of fiber material 60 discharged from the discharge port 4 to a desired amount in conjunction with the rotation of the wheel 6. In other words, the spreading amount adjustment mechanism 8 adjusts the amount of fiber material 60 discharged from the discharge port 4 to a desired amount in accordance with the amount of rotation of the wheel 6, i.e., the distance traveled by the fiber material spreading device 1. The spreading amount adjustment mechanism 8 is provided between the storage section 3 and the discharge port 4 in the internal cavity of the main body 2. The fiber material 60 stored in the storage section 3 is discharged from the discharge port 4 onto the surface layer 51a of the concrete 51 via the spreading amount adjustment mechanism 8. Note that in Figure 2, the fiber material 60 is omitted to make the internal structure of the fiber material spreading device 1 easier to understand. In Figures 3 and 4, the fiber material 60 inside the fiber material spreading device 1 is omitted.

[0017] The spreading amount adjustment mechanism 8 of this embodiment is configured to include an intermediate opening 9 provided between the storage section 3 and the discharge port 4, a loosening mechanism 11 provided in the storage section 3, a switching mechanism 14 provided near the intermediate opening 9, and an impeller 16 positioned between the intermediate opening 9 and the discharge port 4. The fiber material spreading device 1 of this embodiment has a transmission mechanism 19 that transmits the rotational driving force of the wheels 6 to the spreading amount adjustment mechanism 8.

[0018] The intermediate opening 9 has an opening area equal to the input opening of the storage section 3. 3b It is set to be narrower than the others. Because the fibrous material 60 tends to get tangled with each other, when the dispensing amount adjustment mechanism 8 is not in operation, the fibrous material 60 that has been fed into the storage section 3 from the input port 3b remains clumped together above the intermediate opening 9. The rotation shaft 18 of the impeller 16 extends in the left-right direction and is pivotally supported by the main body 2. The impeller 16 has a structure in which multiple blades 17 are arranged radially around the outer circumference of the rotation shaft 18.

[0019] The transmission mechanism 19 of this embodiment is configured to include a first pulley 20 provided on the axle 5 of the wheel 6, a second pulley 21 provided on the rotating shaft 18 of the impeller 16, and a belt 22 wrapped around the first pulley 20 and the second pulley 21. The first pulley 20 and the second pulley 21 here include sprockets, and the belt 22 includes a chain. When the first pulley 20 rotates together with the wheel 6 and the axle 5, the rotational driving force is transmitted to the second pulley 21 via the belt 22, and the impeller 16 (rotating shaft 18) rotates in the direction of rotation of the wheel 6 (forward and backward direction) in conjunction with the rotation of the wheel 6.

[0020] The switching mechanism 14 is a mechanism that switches between an open state and a closed state of the intermediate opening 9 in conjunction with the rotation of the wheel 6. The switching mechanism 14 in this embodiment has an opening / closing cover 15 that is rotatably connected to the main body 2 via a support shaft 10 in the intermediate opening 9. The opening / closing cover 15 is made of, for example, a leaf spring member. As shown in Figure 2, when the lower end of the opening / closing cover 15 is not pushed forward by the blades 17 of the impeller 16, the intermediate opening 9 is closed by the opening / closing cover 15. In this embodiment, the opening / closing cover 15 is pressed against the edge of the intermediate opening 9 by the biasing force of the leaf spring member.

[0021] As shown in Figure 5, when the impeller 16 rotates and the blades 17 push the lower end of the opening / closing lid 15 forward, the opening / closing lid 15 rotates in the front-rear direction around the pivot shaft 10, causing the intermediate opening 9 to open. When the impeller 16 rotates further and the state in which the blades 17 push the lower end of the opening / closing lid 15 forward is released, the opening / closing lid 15 closes the intermediate opening 9 again. In other words, in this embodiment, the impeller 16, together with the first pulley 20, belt 22, and second pulley 21, functions as a transmission mechanism 19 that transmits the rotational driving force of the wheel 6 to the switching mechanism 14. Note that in Figure 5, the fiber material 60 is omitted in the illustration to make the internal structure of the fiber material spreading device 1 easier to understand.

[0022] The loosening mechanism 11 is a mechanism that loosens a desired amount of fiber material 60 stored in the storage section 3 in conjunction with the rotation of the wheel 6. The loosening mechanism 11 in this embodiment is composed of a pair of left and right arm sections 12 rotatably connected to the main body section 2 via a support shaft 10, and a swinging section 13 stretched across the upper part of the pair of arm sections 12. When the opening / closing lid section 15 rotates in the front-rear direction around the support shaft 10, the arm sections 12 and the swinging section 13 swing (rotate) in the front-rear direction around the support shaft 10. That is, in this embodiment, the opening / closing lid section 15, together with the first pulley 20, belt 22, second pulley 21, and impeller 16, functions as a transmission mechanism 19 that transmits the rotational driving force of the wheel 6 to the loosening mechanism 11.

[0023] As the wheel 6 rotates, the arm 12 and the swinging part 13 swing at the bottom of the storage part 3, loosening the desired amount of fiber material 60 accumulated at the bottom of the storage part 3. The loosened fiber material 60 then passes through the intermediate opening 9, which is opened sequentially, and falls toward the impeller 16. The swinging part 13 is composed of, for example, a rod-shaped member or a plate-shaped member. It can also be a comb-shaped swinging part 13 or a swinging part 13 with an uneven shape.

[0024] The fibrous material 60 that falls between the blades 17 of the impeller 16 falls towards the discharge port 4 as the impeller 16 rotates, and the fallen fibrous material 60 is discharged from the discharge port 4 onto the surface layer 51a of the concrete 51. When the movement of the fibrous material spreading device 1 is stopped, the rotation of the impeller 16 also stops, and the intermediate opening 9 is closed by the biasing force of the leaf spring member that constitutes the opening / closing lid 15. As a result, when the fibrous material spreading device 1 is stopped, no fibrous material 60 is discharged from the discharge port 4.

[0025] Next, we will explain how to manufacture a concrete structure 50 using the fiber material spreading device 1.

[0026] The formwork is set up and the reinforcing bars 52 are placed, and concrete 51 (ready-mix concrete) is poured inside the formwork. Next, after the poured concrete 51 is roughly leveled, the fiber material spreading device 1 is placed on top of the poured, unhardened concrete 51. The storage section 3 of the fiber material spreading device 1 is filled with fiber material 60. In this embodiment, the fiber material 60 is fed in from the input port 3b of the hopper 3a, so that the fiber material 60 is contained in the storage section 3 above the intermediate opening 9. The fiber material 60 contained in the storage section 3 is entangled with each other.

[0027] Next, before the poured concrete 51 hardens, specifically, for example, within 0 to 1 hour after pouring the concrete 51, the fiber material 60 is spread on the surface layer 51a of the concrete 51 using the fiber material spreading device 1. Specifically, the worker holds the handle 7 and pulls the fiber material spreading device 1 on the surface layer 51a of the concrete 51, moving it forward. As the fiber material spreading device 1 moves on the surface layer 51a, the wheels 6 roll on the surface layer 51a, and the rotational driving force of the wheels 6 is transmitted to the impeller 16 by the transmission mechanism 19 (first pulley 20, belt 22 and second pulley 21), causing the impeller 16 to rotate in conjunction with the rotation of the wheels 6.

[0028] Then, in conjunction with the rotation of the impeller 16, the opening / closing lid 15 rotates back and forth around the pivot shaft 10, switching the open and closed states of the intermediate opening 9 alternately, and the loosening mechanism 11 loosens the desired amount of fiber material 60 stored in the storage section 3. As a result, the desired amount of fiber material 60 corresponding to the amount of rotation of the wheel 6 falls from the storage section 3 through the intermediate opening 9 towards the impeller 16. The fiber material 60 that falls between the blades 17 of the impeller 16 falls sequentially towards the discharge port 4 as the impeller 16 rotates, and is discharged from the discharge port 4 onto the surface layer 51a of the concrete 51.

[0029] In this way, by moving the fiber material spreading device 1 over the concrete 51 before it hardens, a desired amount of fiber material 60 corresponding to the amount of rotation of the wheels 6, i.e., the distance the fiber material spreading device 1 moves, is spread onto the surface layer 51a of the concrete 51. The spreading amount adjustment mechanism 8 can be set, for example, to 1m 2 It is recommended to set the amount of fiber material 60 to be scattered using the scattering amount adjustment mechanism 8 so that approximately 50g to 300g of fiber material 60 is scattered per unit.

[0030] After scattering the fibrous material 60 onto the surface layer 51a of the concrete 51, a tamping operation is performed to press the fibrous material 60 down into the surface layer 51a, followed by a final surface leveling operation. Then, the concrete 51 is cured for a predetermined period to allow it to harden. Through these steps, the manufacture of the concrete structure 50 with the fibrous material 60 embedded in the surface layer 51a is completed.

[0031] Thus, in this invention, simply by moving the fiber material spreading device 1 over the surface layer 51a of the poured, unhardened concrete 51 and rolling the wheels 6, the desired amount of fiber material 60 is discharged from the discharge port 4 by the spreading amount adjustment mechanism 8 in conjunction with the rotation of the wheels 6. Therefore, regardless of the skill of the worker, the fiber material 60 can be uniformly spread over the surface layer 51a of the concrete 51, and a concrete structure 50 with fiber material 60 embedded in the surface layer 51a can be efficiently manufactured. In particular, spreading the fiber material 60 over a wide area by hand requires a great deal of effort and time, but in this invention, the fiber material 60 can be spread over a wide area simply by moving the fiber material spreading device 1, thus reducing the workload on workers and shortening the construction period. Furthermore, by using the fiber material spreading device 1, a concrete structure 50 with more stable quality can be manufactured than when the fiber material 60 is spread by hand.

[0032] Furthermore, this manufacturing method allows for the production of a more durable concrete structure 50 at a lower cost compared to the case where the fiber material 60 is embedded throughout, by embedding the fiber material 60 only in the surface layer 51a of the concrete structure 50. In addition, since the fiber material 60 can be uniformly embedded in the surface layer 51a of the concrete 51, stress concentration in a part of the concrete structure 50 is less likely to occur, which is advantageous in increasing the durability of the concrete structure 50. Since there is no need to mix the ready-mix concrete and the fiber material 60 using the drum of an agitator truck, the labor and cost required for cleaning the drum and disposing of leftover concrete can also be reduced.

[0033] If the dispensing amount adjustment mechanism 8 is configured to include a loosening mechanism 11, the loosening mechanism 11 loosens the desired amount of fiber material 60 stored in the storage section 3 in conjunction with the rotation of the wheel 6. This allows for relatively accurate adjustment of the amount of fiber material 60 discharged from the discharge port 4, despite the simple configuration. Furthermore, since the fiber material 60 stored in the storage section 3 is loosened by the loosening mechanism 11 before being dispensed from the discharge port 4, it is more reliably possible to avoid the fiber material 60 being dispensed in clumps. Therefore, this is advantageous for uniformly dispensing the fiber material 60. In this embodiment, if the device is configured to include a transmission mechanism 19 that transmits the rotational driving force of the wheel 6 to the loosening mechanism 11, there is no need to provide a drive device such as a motor in the loosening mechanism 11, thus allowing for a very simple configuration of the fiber material dispensing device 1.

[0034] If the loosening mechanism 11 has an arm portion 12 and a swinging portion 13, the swinging portion 13 can efficiently loosen the fiber material 60 stored in the storage portion 3, and smoothly guide the loosened fiber material 60 to the intermediate opening 9. Therefore, the amount of fiber material 60 passing from the storage portion 3 to the intermediate opening 9 is stable, which is more advantageous for uniformly distributing the fiber material 60. Furthermore, the loosening mechanism 11 can be configured in a way that allows it to loosen a desired amount of fiber material 60 stored in the storage portion 3 in conjunction with the rotation of the wheels 6, and can have a configuration different from the embodiment described above.

[0035] If the dispensing amount adjustment mechanism 8 is configured to have an intermediate opening 9 and a switching mechanism 14, the switching mechanism 14 can switch between the open and closed states of the intermediate opening 9 in conjunction with the rotation of the wheel 6, thereby allowing for precise adjustment of the amount of fiber material 60 discharged from the discharge port 4, despite the simple configuration. If the switching mechanism 14 is configured to have an opening / closing lid 15 made of a leaf spring member, the switching mechanism 14 can be made simpler. The switching mechanism 14 can also be configured differently from the example embodiment, as long as it can switch between the open and closed states of the intermediate opening 9 in conjunction with the rotation of the wheel 6.

[0036] If the dispensing amount adjustment mechanism 8 is configured to have an impeller 16 that rotates in conjunction with the rotation of the wheels 6, the fibrous material 60 that falls through the intermediate opening 9 will be more finely dispersed by the rotating impeller 16. Therefore, it is possible to more reliably avoid the fibrous material 60 being discharged from the discharge port 4 in clumps, which is advantageous for uniformly dispensing the fibrous material 60.

[0037] By having a transmission mechanism 19 that transmits the rotational driving force of the wheels 6 to the spreading amount adjustment mechanism 8, the spreading amount adjustment mechanism 8 can be operated simply by rolling the wheels 6, without the need to provide a motor or other drive device for each mechanism constituting the spreading amount adjustment mechanism 8. Therefore, the fiber material spreading device 1 can be constructed very simply, eliminating the need to equip the fiber material spreading device 1 with a power supply, or allowing for a reduction in the weight of the power supply. As a result, the convenience of the fiber material spreading device 1 is greatly increased. Note that the configuration of the transmission mechanism 19 can also be different from the embodiment exemplified.

[0038] As in this embodiment, by configuring the transmission mechanism 19 to have a first pulley 20, a second pulley 21, and a belt 22, the transmission mechanism 19 can be made very simple. For example, the axle 5 can be equipped with multiple first pulleys 20 of different diameters and a gear changing mechanism, so that the rotational speed of the second pulley 21 corresponding to the rotational speed of the first pulley 20 can be changed. By providing a gear changing mechanism, it becomes possible to change the amount of fiber material 60 scattered corresponding to the amount of rotation of the wheel 6, depending on the type of fiber material 60 used and the tensile strength required of the concrete structure 50. Therefore, the versatility of the fiber material spreading device 1 is increased. For example, the same effect can be achieved when multiple second pulleys 21 of different diameters and a gear changing mechanism are equipped on the rotating shaft 18.

[0039] Figures 6 and 7 illustrate another embodiment of the fiber material dispersing device 1 according to the present invention.

[0040] The fiber material spreading device 1 of this embodiment has the same basic configuration as the fiber material spreading device 1 of the previously illustrated embodiment, but the arrangement of the wheels 6 relative to the main body 2 and the structure of the handle 7 are different. The other configurations are generally the same as the fiber material spreading device 1 of the previously illustrated embodiment.

[0041] In this embodiment, wheels 6 are positioned at the rear of the main body 2, and the front end of the discharge port 4 is located in front of the front end of the wheels 6. Furthermore, the handle 7 is rotatable back and forth on the main body 2. As shown in Figure 6, by positioning the handle 7 in front of the main body 2, the fiber material spreading device 1 can be towed and moved. As shown in Figure 7, by positioning the handle 7 at the rear of the main body 2, the fiber material spreading device 1 can be pushed and moved.

[0042] As shown in Figure 6, normally, the handle 7 is positioned in front of the main body 2 and the operator pulls and moves the fiber material spreading device 1, allowing for efficient spreading of the fiber material 60 with a low risk of the fiber material 60 peeling off from the surface layer 51a or the spread fiber material 60 becoming disordered. As shown in Figure 7, when spreading the fiber material 60 in a corner where there are pillars or walls, the handle 7 is positioned behind the main body 2 and the operator pushes and moves the fiber material spreading device 1, allowing the fiber material spreading device 1 to spread the fiber material 60 uniformly to the corner. In this embodiment, the front end of the discharge port 4 is positioned in front of the front end of the wheel 6, so that the wheel 6 does not get in the way when spreading the fiber material 60 in a corner, and the fiber material 60 can be spread smoothly to the corner.

[0043] In this embodiment, the handle 7 is structured to rotate back and forth on the main body 2. However, for example, the handle 7 can be made detachable from the main body 2, allowing the position of the handle 7 relative to the main body 2 to be changed between front and rear. Also, for example, if handles 7 are provided on both the front and rear sides of the main body 2, and the fiber material spreading device 1 is moved by pushing it, the front handle 7 can be moved behind the front end of the discharge port 4, or the front handle 7 can be removed.

[0044] Figure 8 illustrates another embodiment of the fiber material dispersing device 1 according to the present invention.

[0045] The fiber material spreading device 1 of this embodiment has a pressing mechanism 30 added to the fiber material spreading device 1 of the embodiment illustrated in Figures 1 to 5. The other configurations are the same as the fiber material spreading device 1 of the embodiment illustrated in Figures 1 to 5.

[0046] The pressing mechanism 30 presses the fibrous material 60 discharged from the discharge port 4 toward the surface layer 51a of the concrete 51. In this embodiment, the pressing mechanism 30 consists of a roller 31 positioned behind the main body 2. The roller 31 is configured to allow its vertical position to be changed. The vertical position of the lower end of the roller 31 should be set to the same height as the surface of the concrete 51. When the fibrous material spreading device 1 is moved over the concrete 51 and the fibrous material 60 is scattered onto the surface layer 51a from the discharge port 4, the scattered fibrous material 60 is pressed down from above by the roller 31 positioned behind the discharge port 4. As a result, the scattered fibrous material 60 sinks into the surface layer 51a of the concrete 51.

[0047] As described above, by providing the pressing mechanism 30, the fibrous material 60 can be embedded in the surface layer 51a of the concrete 51 simply by moving the fibrous material spreading device 1 over the concrete 51, thus eliminating the need for tamping or shortening the time required for tamping. Therefore, it is even more advantageous in reducing the workload on workers and shortening the construction period. If the pressing mechanism 30 is made of rollers 31, the pressing mechanism 30 can be constructed very simply.

[0048] Figures 9 and 10 illustrate yet another embodiment of the fiber material dispensing device 1 according to the present invention.

[0049] The fiber material spreading device 1 of this embodiment has a pressing mechanism 30 with a different configuration than the fiber material spreading device 1 of the embodiment illustrated in Figure 8. The other configurations are the same as those of the embodiment illustrated in Figure 8. Note that in Figures 9 and 10, the fiber material 60 inside the fiber material spreading device 1 is omitted from the illustration.

[0050] The pressing mechanism 30 in this embodiment is configured to have a third pulley 32, a link mechanism 33, and a pressing part 34 located at the rear of the main body 2. A belt is wrapped around the second pulley 21 and the third pulley 32, and when the first pulley 20 rotates together with the wheel 6, its rotational driving force is transmitted to the third pulley 32 via the second pulley 21. The pressing part 34 is a plate-shaped member or a mesh-shaped member that presses down on the fibrous material 60 scattered on the surface layer 51a from the discharge port 4.

[0051] The link mechanism 33 is a mechanism that converts the rotational drive of the third pulley 32 into vertical movement of the pressing portion 34, and moves the pressing portion 34 up and down in conjunction with the rotation of the third pulley 32. As shown in Figure 9, when the pressing portion 34 is in its lowest position, the lower end surface of the pressing portion 34 is in contact with the surface portion 51a. As shown in Figure 10, when the pressing portion 34 rises, the lower end surface of the pressing portion 34 is separated from the surface portion 51a.

[0052] When the fiber material spreading device 1 is moved over the concrete 51 and the fiber material 60 is spread onto the surface layer 51a from the discharge port 4, the spread fiber material 60 is pressed down from above by the vertically moving pressing unit 34 located behind the discharge port 4. As a result, the spread fiber material 60 sinks into the surface layer 51a of the concrete 51. By configuring the pressing unit 34 to move vertically using the rotational driving force of the wheels 6, the fiber material 60 can be more effectively sunk into the surface layer 51a. The link mechanism 33 can be any mechanism that can convert the rotational drive of the third pulley 32 into the vertical movement of the pressing unit 34, and can be a different structure from the one shown in the figure.

[0053] The above example illustrates the manufacturing of a slab as a concrete structure 50, but the fiber material spreading device 1 can also be used to manufacture other concrete structures 50. The loosening mechanism 11, switching mechanism 14, and impeller 16 that constitute the spreading amount adjustment mechanism 8 illustrated above can each be provided as desired and can be combined as desired. For example, the spreading amount adjustment mechanism 8 can be configured to have the loosening mechanism 11 and the impeller 16 without the switching mechanism 14.

[0054] Furthermore, the dispensing amount adjustment mechanism 8 is not limited to the embodiment exemplified above and can be configured in various ways, as long as it can adjust the amount of fibrous material 60 discharged to the discharge port 4 in conjunction with the rotation of the wheels 6 to a desired amount. For example, a sensor that measures the amount of rotation of the wheels 6 can be provided, and the amount of fibrous material 60 discharged from the storage unit 3 to the discharge port 4 can be electronically controlled based on the measurement data from the sensor. [Explanation of Symbols]

[0055] 1. Fiber material spreading device 2 Main body 2a Frame section 3. Storage area 3a Hopper 3b Inlet 4 Outlet 5 axles 6 wheels 7. Handle 8 Spreading amount adjustment mechanism 9 Midway opening 10 spindle 11. Loosening Mechanism 12 Arm section 13. Oscillating part 14. Switching mechanism 15. Opening / closing lid section 16 Impeller 17 feathers 18 rotation axes 19 Transmission mechanism 20. First pulley 21. Second pulley 22 belts 30 Pressing mechanism 31 Laura 32 Third Pulley 33 Link mechanism 34 Pressing part 50 Concrete Structures 51 Concrete 51a Surface layer 52 Reinforcement bars 60 Fiber materials

Claims

1. In a fiber material spreading device that scatters fiber material onto the surface layer of concrete before it has solidified after being placed, The apparatus comprises a main body having a storage section for containing the fiber material and a discharge port from which the fiber material stored in the storage section is discharged, a wheel connected to the main body and rolling on the surface, and a dispensing amount adjustment mechanism that adjusts the amount of the fiber material discharged from the discharge port to a desired amount in conjunction with the rotation of the wheel, A fiber material spreading device characterized in that the entire spreading amount adjustment mechanism is positioned above the discharge port and within the interior of the main body, the wheels are positioned outside the range through which the discharge port passes when viewed from above, and the main body and the spreading amount adjustment mechanism are separate components.

2. In a fiber material spreading device that scatters fiber material onto the surface layer of concrete before it has solidified after being placed, The apparatus comprises a main body having a storage section with an internal space for containing the fiber material and a discharge port from which the fiber material contained in the storage section is discharged, a wheel connected to the main body and rolling on the surface, and a dispersal amount adjustment mechanism that adjusts the amount of the fiber material discharged from the discharge port to a desired amount in conjunction with the rotation of the wheel, The fiber material spreading device is characterized in that the spreading amount adjustment mechanism includes a fiber material loosening mechanism having a swinging part separate from the storage part, and the swinging part is arranged in the internal space of the storage part and swings back and forth relative to the inner wall of the storage part.

3. The fiber material spreading device according to Claim 2, wherein the spreading amount adjustment mechanism has an impeller, the impeller is positioned between the loosening mechanism and the discharge port, and rotates in conjunction with the rotation of the wheel to further loosen the fiber material that has been loosened by the loosening mechanism.

4. The fiber material spreading device according to Claim 2, wherein the spreading amount adjustment mechanism has an intermediate opening and a switching mechanism, the intermediate opening is provided between the loosening mechanism and the discharge port, and the switching mechanism switches between an open state and a closed state of the intermediate opening in conjunction with the rotation of the wheels.

5. In a fiber material spreading device that scatters fiber material onto the surface layer of concrete before it has solidified after being placed, The apparatus comprises a main body having a storage section for containing the fiber material and a discharge port from which the fiber material stored in the storage section is discharged, a wheel connected to the main body and rolling on the surface, and a dispensing amount adjustment mechanism that adjusts the amount of the fiber material discharged from the discharge port to a desired amount in conjunction with the rotation of the wheel, The fiber material spreading device is characterized in that the spreading amount adjustment mechanism comprises an intermediate opening provided between the upper and lower parts of the storage section and the discharge port, a switching mechanism that switches between an open state and a closed state of the intermediate opening in conjunction with the rotation of the wheels, and an impeller that rotates in conjunction with the rotation of the wheels to loosen the fiber material that has passed through the intermediate opening, and the entire impeller is positioned between the upper and lower parts of the intermediate opening and the discharge port.

6. In a fiber material spreading device that scatters fiber material onto the surface layer of concrete before it has solidified after being placed, The apparatus comprises a main body having a storage section for containing the fiber material and a discharge port from which the fiber material stored in the storage section is discharged, a wheel connected to the main body and rolling on the surface, and a dispensing amount adjustment mechanism that adjusts the amount of the fiber material discharged from the discharge port to a desired amount in conjunction with the rotation of the wheel, A fiber material spreading device having a pressing mechanism for pressing the fiber material discharged from the discharge port toward the surface layer, characterized in that when the fiber material is spread, the pressing mechanism is positioned behind the discharge port in a top view and within the range through which the discharge port passes.

7. In a fiber material spreading device that scatters fiber material onto the surface layer of concrete before it has solidified after being placed, The apparatus comprises a main body having a storage section for containing the fiber material and a discharge port from which the fiber material contained in the storage section is discharged, a wheel connected to the main body and rolling on the surface, a dispensing amount adjustment mechanism that adjusts the amount of the fiber material discharged from the discharge port to a desired amount in conjunction with the rotation of the wheel, and a handle. A fiber material spreading device characterized in that the wheels are positioned at the rear of the main body, the front end of the discharge port is positioned in front of the front end of the wheels, and the position of the handle can be changed between a state in which it extends behind the front end of the discharge port and a state in which it extends in front of the front end of the discharge port.

8. A method for manufacturing a concrete structure in which the fibrous material is embedded in the surface layer using a fibrous material scattering device according to any one of claims 1 to 7, A method for manufacturing a concrete structure, characterized by moving the fiber material spreading device over the surface layer of the poured, unhardened concrete, causing the wheels to roll over the surface layer, and spreading the fiber material on the surface layer while adjusting the amount of fiber material discharged from the discharge port to a desired amount using the spreading amount adjustment mechanism.

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