Fiber scattering equipment, fiber scattering unit, and fiber scattering method

Abstract

The present invention provides a fiber scattering device, a fiber scattering unit, and a fiber scattering method for easily and appropriately scattering fiber fragments onto the surface of concrete before it hardens. [Solution] A fiber scattering device 10 according to one embodiment of the present invention comprises: a housing 11 that houses a plurality of fiber pieces and has an outlet 16, and is positioned so that the outlet 16 faces the surface of concrete before it hardens; a vibration transmission unit 30 that receives vibrations applied from a vibration applying device 50 and transmits vibrations to the housing 11 in order to discharge fiber pieces from the housing 11 through the outlet 16; and a scattering unit 22 that has a plurality of openings provided at a position facing the outlet 16, and scatters the fiber pieces discharged from the housing 11 by passing the fiber pieces through each of the plurality of openings.

Description

Technical Field

[0001] The present invention relates to a fiber spraying device, a fiber spraying unit, and a fiber spraying method, and particularly to a fiber spraying device, a fiber spraying unit, and a fiber spraying method for spraying fibers onto the surface of concrete before curing.

Background Art

[0002] There is a known construction method of improving the toughness and tensile durability of a structure made of concrete by embedding fiber pieces (short fibers) in the concrete. This construction method (hereinafter, reinforcement method) includes a mixing type and a spraying type. In the mixing type, fiber pieces are put into the drum of an agitator truck that transports fresh concrete, and the fresh concrete and the fiber pieces are mixed, and then the fresh concrete containing fibers is placed. However, in the mixing type, since fiber pieces adhere to the agitator truck and the pump truck for placing concrete, etc., it takes time and effort for the cleaning work to remove the fiber pieces. Due to this, the mixing type reinforcement method is not in a widespread situation.

[0003] On the other hand, in the spraying type, fiber pieces are sprayed onto the surface of the placed concrete before curing. As an example of the spraying type reinforcement method, the method described in Patent Document 1 can be cited. In the spraying method of Patent Document 1, a housing part for housing a fiber material (corresponding to fiber pieces) and a discharge port for discharging the fiber material housed in the housing part are provided in the main body part, and a fiber material spraying device in which wheels are connected to the main body part is moved on the surface layer part of the placed concrete before curing. Then, the fiber material is sprayed onto the surface layer part of the concrete by a spraying amount adjusting mechanism that adjusts the amount of the fiber material discharged from the discharge port in conjunction with the rotation of the wheels to a predetermined amount. According to this method, the fiber material can be uniformly sprayed onto the surface layer part of the concrete.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] However, the scattering method described in Patent Document 1 requires the wheels to roll (rotate) on the surface layer of the concrete in order to scatter the fibrous material, and it is necessary to wait until the concrete has hardened enough for the wheels to roll on the surface. Furthermore, it is difficult to scatter the fibrous material near the edges and corners of the concrete pouring area because the wheels cannot easily reach them. Moreover, the fibrous material scattering device used in the scattering method described in Patent Document 1 is a relatively large device because it includes wheels, and requires time and effort to transport and use.

[0006] Therefore, the present invention has been made in view of the above problems, and its object is to provide a fiber scattering device, a fiber scattering unit, and a fiber scattering method for easily and appropriately scattering fiber fragments onto the surface of concrete before it hardens. [Means for solving the problem]

[0007] The above problems are solved by the fiber scattering device of the present invention, which comprises a housing that houses a plurality of fiber pieces and has an outlet, the outlet being positioned to face the surface of concrete before it hardens; a vibration transmission unit that receives vibrations applied from a vibration device and transmits the vibrations to the housing in order to discharge the fiber pieces from the housing through the outlet; and a scattering unit that has a plurality of openings provided at a position opposite the outlet, and scatters the fiber pieces discharged from the housing by passing the fiber pieces through each of the multiple openings. In other words, by using the fiber-spreading device of the present invention, fiber material can be uniformly spread on the surface of concrete before it hardens with relatively simple operation.

[0008] Furthermore, in the above-described fiber dispersing device, the dispersing section is preferably made of wire mesh, and the multiple openings are preferably multiple mesh openings provided in the wire mesh. According to the above configuration, fiber fragments can be scattered using a simpler setup.

[0009] Furthermore, in the above-mentioned fiber scattering equipment, if the length of the fiber piece is t and the mesh opening in the wire mesh is s, and the length of the fiber piece t satisfies the following relation (1), then it is more preferable that the mesh opening s satisfies the following relation (2). 6mm ≤ t ≤ 65mm (1) t / 6 ≤ s ≤ 2t / 3 (2) With the above configuration, when scattering fiber fragments using a wire mesh, the fiber fragments are more likely to fall through the mesh, allowing for efficient scattering of the fiber fragments.

[0010] Furthermore, in the above-described fiber spreading device, it is preferable that the housing is a frame member, with an outlet provided at the lower end of the housing and an input port provided at the upper end of the housing, through which fiber pieces are fed into the housing. The above configuration allows for a simpler design of the enclosure.

[0011] Furthermore, it is even more preferable if the above-mentioned fiber spreading device further includes a lid that can be attached to the housing to cover the discharge port or input port. The above configuration makes it possible to prevent unwanted fiber fragments from falling out of the enclosure and from flying out of the input opening.

[0012] Furthermore, in the above-described fiber scattering device, the wire mesh may have a plurality of first wires extending in a first direction and aligned in a second direction intersecting the first direction, and a plurality of second wires extending in a second direction and aligned in the first direction, which may intersect with each other. In addition, if two first wires adjacent to each other in the second direction are designated as wire 1A and wire 1B, and two second wires adjacent to each other in the first direction are designated as wire 2A and wire 2B, it is even more preferable that in the area where wires 1A and 1B intersect with wire 2A in the wire mesh, wire 1A is located lower than wire 1B, and in the area where wires 1A and 1B intersect with wire 2B in the wire mesh, wire 1B is located lower than wire 1A. With the above configuration, when scattering fiber fragments using a wire mesh, the fiber fragments are more likely to fall through the mesh, allowing for more efficient scattering of fiber fragments.

[0013] Furthermore, in the fiber scattering device described above, each first wire may alternately have a first upper intersection point that intersects the second wire above it and a first lower intersection point that intersects the second wire below it in the first direction. In this case, it is even more preferable that the first upper intersection point of the first A wire and the first lower intersection point of the first B wire are located in the same position in the first direction, and that the first lower intersection point of the first A wire and the first upper intersection point of the first B wire are located in the same position in the first direction. With the above configuration, when scattering fiber fragments using a wire mesh, the fiber fragments are more likely to fall through the mesh, allowing for more efficient scattering of the fiber fragments.

[0014] Furthermore, in the fiber scattering device described above, each second wire may alternately have a second upper intersection point that intersects the first wire above it and a second lower intersection point that intersects the first wire below it, in the second direction. In this case, it is even more preferable that the second upper intersection point of the second A wire and the second lower intersection point of the second B wire are located in the same position in the second direction, and that the second lower intersection point of the second A wire and the second upper intersection point of the second B wire are located in the same position in the second direction. With the above configuration, when scattering fiber fragments using a wire mesh, the fiber fragments are more likely to fall through the mesh, allowing for more efficient scattering of the fiber fragments.

[0015] Furthermore, in the above-described fiber scattering equipment, it is even more preferable that the vibration transmission section is provided on the side wall of the housing and has a holding section capable of detachably holding the vibration-applying device. With the above configuration, it is possible to stably maintain a state in which the vibration-applying device is attached to the housing, that is, a state in which vibrations can be transmitted from the vibration-applying device to the housing.

[0016] Further, according to the fiber spraying unit of the present invention, the above-described problem is solved by providing a fiber spraying device and a vibration applying device attached to the fiber spraying device. The fiber spraying device includes a housing that houses a plurality of fiber pieces, has a discharge port, and is disposed at a position where the discharge port faces the surface of the concrete before curing, and a vibration transmission unit that receives vibration applied from the vibration applying device and transmits the vibration to the housing in order to discharge the fiber pieces from the housing through the discharge port, and a spraying unit that has a plurality of openings provided at positions facing the discharge port, allows the fiber pieces to pass through each of the plurality of openings, and sprays the fiber pieces discharged from the housing. That is, by using the fiber spraying unit of the present invention, the fiber material can be uniformly sprayed on the surface of the concrete before curing by a relatively simple operation.

[0017] Further, according to the fiber spraying method of the present invention, the above-described problem is solved by spraying a plurality of fiber pieces on the surface of the concrete before curing using the above-described fiber spraying device or the above-described fiber spraying unit. That is, according to the fiber spraying method of the present invention, the fiber material can be uniformly sprayed on the surface of the concrete before curing by a relatively simple operation.

Advantages of the Invention

[0018] According to the present invention, it is possible to easily and appropriately spray the fiber pieces on the surface of the concrete before curing.

Brief Description of the Drawings

[0019] [Figure 1] It is an external view of a fiber spraying unit according to an embodiment of the present invention, showing a state where a lid is attached to the upper part of the housing. [Figure 2] It is an external view of a fiber spraying unit according to an embodiment of the present invention, showing a state where a lid is attached to the upper part of the housing. [Figure 3] It is a bottom view of a housing according to an embodiment of the present invention. [Figure 4] It is a view showing the cross section I-I of FIG. 3. [Figure 5] This is a diagram showing the vibration transmission section and vibration applying device. [Figure 6] This is a magnified view of a portion of the wire mesh. [Figure 7] This is a diagram of the JJ cross section shown in Figure 6. [Figure 8] This is a diagram showing the KK cross section, as shown in Figure 6. [Figure 9] This figure shows how fiber fragments are scattered using a fiber scattering unit. [Figure 10] This is an external view of a fiber scattering unit according to a modified example of the present invention. [Modes for carrying out the invention]

[0020] <<Regarding one embodiment of the present invention>> One embodiment of the present invention (hereinafter referred to as "this embodiment") will be described with reference to the attached drawings. In the drawings, each device or component may be simplified or schematic in order to make the explanation easier to understand. Also, the size (dimensions) of each device or component shown in the drawings, as well as the spacing between devices or components, may differ from the actual dimensions.

[0021] Furthermore, unless otherwise specified, when describing the position, orientation, and posture of each piece of equipment or component, the description shall be of the position, orientation, and posture of each piece of equipment or component as it would be under normal operating conditions.

[0022] Furthermore, in this specification, the meanings of “same,” “identical,” “equal,” “uniform,” “equally divided,” and “equally spaced” may include a range of errors that are generally acceptable in the art to which this invention belongs. Furthermore, in this specification, the meanings of “perpendicular,” “orthogonal,” and “parallel” include a range of errors that are generally acceptable in the art to which this invention belongs, and may include deviations of less than a few degrees (e.g., 2-3°) from strictly perpendicular, orthogonal, and parallel. Furthermore, in this specification, a numerical range represented by "~" means a range that includes the numbers written before and after "~" as the lower and upper limits, respectively.

[0023] Furthermore, in the following, the three mutually orthogonal directions will be defined as the X direction, Y direction, and Z direction. The Z direction corresponds to the height direction (up and down direction) of the fiber scattering device according to this embodiment. The Y direction corresponds to the "first direction" of the present invention, and the X direction corresponds to the "second direction" of the present invention. The second direction is the direction that intersects the first direction (in this embodiment, the orthogonal direction).

[0024] In this embodiment, fiber fragments are scattered on the surface of the concrete before it hardens after being poured (see Figure 9). The fiber fragments are a reinforcing material that improves the toughness and tensile strength of the concrete. After being scattered on the surface of the concrete, they are pressed into the concrete by a pressing device (not shown) and embedded in the surface layer of the concrete. The fiber fragments are short fibers that extend in a straight line and are known as fibers for concrete reinforcement. In this embodiment, fiber fragments with a thickness (diameter) of 0.02 mm to 1.0 mm and a length (fiber length) of 6 mm to 65 mm are used. Here, the length of the fiber fragment refers to the total length of the fiber fragment for straight-extending fiber fragments, and for curved fiber fragments, it refers to the length from one end to the other of the fiber fragment when it is extended in a straight line.

[0025] In this embodiment, a fiber scattering unit 100, shown in Figures 1 and 2, is used for the purpose of uniformly scattering fiber fragments on the surface of concrete before it hardens. The fiber scattering unit 100 is a device that can be carried and used by a person, and as shown in Figures 1 and 2, it is configured by attaching a vibration device 50 to a fiber scattering device 10. The fiber scattering device 10 has a housing 11, a lid 20, a scattering section 22, and a vibration transmission section 30.

[0026] The housing 11 is a frame member that houses multiple fiber pieces inside, and as shown in Figures 1 to 3, it has a roughly rectangular shape when viewed from the Z direction. That is, the housing 11 includes a pair of side walls spaced apart in the X direction (hereinafter referred to as X side walls 12 and 13) and a pair of side walls spaced apart in the Y direction (hereinafter referred to as Y side walls 14 and 15), and these four side walls are arranged to surround the internal space of the housing 11. The housing 11 is sized so that a person can easily carry it with both hands, and for example, as shown in Figure 1, a handle 18 is attached to each of the X side walls 12.

[0027] Furthermore, as shown in Figures 2 and 4, an outlet 16 is provided at the lower end (one end in the Z direction) of the housing 11, and an input port 17 is provided at the upper end (the other end in the Z direction) of the housing 11. The fiber pieces are fed into the housing 11 through the input port 17. Also, as shown in Figure 4, when using the fiber spreading equipment 10, the housing 11 is positioned so that the outlet 16 faces the surface of the concrete before it hardens, and at that position, the fiber pieces inside the housing 11 are discharged to the outside of the housing 11 through the outlet 16.

[0028] The material of the housing 11 is not particularly limited, and for example, the housing 11 may be made of metal, wood, resin material, fibrous material such as paper, or a combination of two or more of these materials.

[0029] The lid 20 is a component that can be attached to the housing 11 to cover the discharge port 16 or the input port 17. In this embodiment, it is detachable from the housing 11 and can be attached to the lower and upper ends of the housing 11, respectively. When loading fiber pieces into the housing 11, and when transporting the housing 11 containing the fiber pieces, the lid 20 is attached to the lower end of the housing 11 to cover the discharge port 16, as shown in Figure 2. This prevents unwanted dropping of fiber pieces from inside the housing 11. On the other hand, when discharging the fiber pieces from inside the housing 11 and scattering them on the surface of concrete before it hardens, the lid 20 is attached to the upper end of the housing 11 to cover the input port 17, as shown in Figure 1. This prevents fiber pieces from unintentionally flying out of the input port 17 when scattering them.

[0030] Furthermore, when the lid 20 is attached to the housing 11, in order to prevent the lid 20 from coming off, as shown in Figure 1, a retaining belt 19 is placed over the lid 20 in the X direction, and both ends of the retaining belt 19 are fastened to handles 18 provided on the X side walls 12 and 13. The retaining belt 19 may be made of rubber, for example.

[0031] The vibration transmission unit 30 is a component that receives vibrations applied from the vibration applying device 50 and transmits those vibrations to the housing 11 in order to discharge fiber fragments from the housing 11 through the discharge port 16. In this embodiment, as shown in Figure 1, the vibration transmission unit 30 is provided on one Y-side wall 14 (corresponding to an example of a side wall of the housing 11). More specifically, the vibration transmission unit 30 has a steel plate (hereinafter referred to as a base plate 31) fixed to the outer wall surface of the Y-side wall 14. The tip of the vibration applying device 50 is pressed against the base plate 31, and in this state, the vibration applying device 50 operates and the tip of the vibration applying device 50 vibrates, causing the base plate 31 to receive vibrations from the vibration applying device 50 and transmit those vibrations to the housing 11.

[0032] As shown in Figure 5, the vibration-generating device 50 is a repurposed version of a known vibration generating device, such as a rod-shaped vibrator like a formwork vibrator, a portable wall hammer (portable vibrator), or an electric tool like an impact wrench. More specifically, it is a modified version of the tip (head) of an existing vibration generating device. In this embodiment, the vibration-generating device 50 can be attached to the housing 11 and is also detachable from the housing 11.

[0033] To explain in more detail, as shown in Figure 5, the vibration transmission unit 30 has a holding unit 32 that can detachably hold the vibration applying device 50. The holding unit 32 has a pair of holding plates 33 and 34 fixed to one end face in the Y direction of the base plate 31 (the end face opposite to the side that contacts the Y side wall 14). The pair of holding plates 33 and 34 protrude outward in the Y direction from the base plate 31 and are provided at a predetermined distance in the Z direction (vertical direction). Also, as shown in Figure 5, the holding plates 33 and 34 are connected to each other by connecting bolts 35.

[0034] As can be seen in Figures 1 and 2, the tip (head) of the vibration device 50 is inserted between the pair of retaining plates 33 and 34, and the nut attached to the connecting bolt 35 is tightened. As a result, the tip (head) of the vibration device 50 is sandwiched between the pair of retaining plates 33 and 34, and the retaining part 32 stably holds the vibration device 50. In other words, the state in which the vibration device 50 is attached to the housing 11 is stably maintained by the retaining part 32. On the other hand, by loosening the nut attached to the connecting bolt 35 and pulling out the tip (head) of the vibration device 50 from between the pair of retaining plates 33 and 34, the holding state of the vibration device 50 by the retaining part 32 is released, and the vibration device 50 can be removed from the housing 11.

[0035] The dispersing unit 22 has multiple openings located opposite the discharge port 16, and disperses the fiber pieces discharged from the housing 11 by passing them through each of the multiple openings. In this embodiment, as shown in Figure 3, the dispersing unit 22 is made of a wire mesh 24, and the multiple openings are multiple meshes 27 provided in the wire mesh 24. The wire mesh 24 extends in the X and Y directions and is located near the discharge port 16 inside the housing 11. In other words, the fiber pieces inside the housing 11 pass through the meshes 27 of the wire mesh 24 and are then discharged outside the housing 11 through the discharge port 16. The mesh size 27 shown in Figure 3 is merely an example, and the number and size of the mesh size 27 are not particularly limited.

[0036] In the wire mesh 24, multiple first wires 25 extending in the Y direction and aligned in the X direction, and multiple second wires 26 extending in the X direction and aligned in the Y direction intersect with each other. The number of each of the first wires 25 and second wires 26 is not particularly limited, but it is preferable to set an appropriate number in relation to the size of the housing 11 and the mesh opening described below.

[0037] Furthermore, when the length of each fiber piece housed in the housing 11 is denoted as t, the length t of the fiber piece satisfies the following relation (1), as described above. 6mm ≤ t ≤ 65mm (1) Furthermore, when the mesh opening in the wire mesh 24 is denoted as s, the mesh opening s satisfies the following relation (2). t / 6 ≤ s ≤ 3t / 2 (2) As shown in Figure 6, the mesh opening s represents the distance between two adjacent wires in the X or Y direction, or in other words, the length of one side of the rectangular mesh 27.

[0038] Furthermore, of the two adjacent first wires 25 in the X direction, one is designated as the first A wire 25a and the other as the first B wire 25b. Similarly, of the two adjacent second wires 26 in the Y direction, one is designated as the second A wire 26a and the other as the second B wire 26b. In this case, in the area where the first A wire 25a and the first B wire 25b intersect with the second A wire 26a in the wire mesh 24, as shown in Figure 6, the first A wire 25a is located lower (towards the discharge port 16) than the first B wire 25b. Here, in Figure 6, the darker colored parts of each wire represent the parts located lower (towards the discharge port 16), and the lighter colored parts of each wire represent the parts located higher (on the opposite side of the discharge port 16).

[0039] Furthermore, in the area where the first A wire 25a and the first B wire 25b intersect with the second B wire 26b in the wire mesh 24, as shown in Figure 6, the first B wire 25b is located lower (towards the discharge port 16) than the first A wire 25a. In other words, a gap is provided between the first A wire 25a and the first B wire 25b in the Z direction. The fiber pieces inside the housing 11 pass through the mesh 27 through this gap.

[0040] On the other hand, in the area where the second A wire 26a and the second B wire 26b intersect with the first A wire 25a in the wire mesh 24, as shown in Figure 6, the second B wire 26b is located above the second A wire 26a (towards the discharge port 16). Also, in the area where the second A wire 26a and the second B wire 26b intersect with the first B wire 25b in the wire mesh 24, as shown in Figure 6, the second A wire 26a is located below the second B wire 26b (towards the discharge port 16). In other words, in the Z direction, a gap is provided between the second A wire 26a and the second B wire 26b. The fiber pieces inside the housing 11 pass through the mesh 27 through this gap.

[0041] Furthermore, in this embodiment, each first wire 25 alternately has a first upper intersection portion 25c that intersects the second wire 26 above it and a first lower intersection portion 25d that intersects the second wire 26 below it, as shown in Figure 7, in the Y direction. For example, if each first wire 25 has a regularly meandering wave shape in the Z direction and alternately has peaks and valleys, the peaks of the peaks correspond to the first upper intersection portion 25c and ride up onto the second wire 26, and the bottoms of the valleys correspond to the first lower intersection portion 25d and tuck under the second wire 26.

[0042] In the wire mesh 24, as shown in Figure 6, the first upper intersection 25c of the first A wire 25a and the first lower intersection 25d of the first B wire 25b are located at the same position in the Y direction. Also, in the Y direction, the first lower intersection 25d of the first A wire 25a and the first upper intersection 25c of the first B wire 25b are located at the same position. In other words, between two adjacent first wires 25 in the X direction, the first upper intersection 25c and the first lower intersection 25d are arranged in a staggered pattern. The first lower intersection 25d of the first A wire 25a and the first upper intersection 25c of the first B wire 25b may be in the same position in the Z direction, or they may be in different positions.

[0043] Furthermore, similar to the case of the first wire 25, in this embodiment, each second wire 26 alternately has a second upper intersection portion 26c that intersects the first wire 25 above it, and a second lower intersection portion 26d that intersects the first wire 25 below it, in the X direction, as shown in Figure 8. For example, if each second wire 26 has a regularly meandering wave shape in the Z direction, and alternately has peaks and valleys, the peaks of the peaks correspond to the second upper intersection portion 26c and ride up onto the first wire 25, and the bottoms of the valleys correspond to the second lower intersection portion 26d and tuck under the first wire 25.

[0044] In the wire mesh 24, as shown in Figure 6, the second upper intersection 26c of the second A wire 26a and the second lower intersection 26d of the second B wire 26b are located at the same position in the X direction. Also, in the X direction, the second lower intersection 26d of the second A wire 26a and the second upper intersection 26c of the second B wire 26b are located at the same position. In other words, between two adjacent second wires 26 in the Y direction, the second upper intersection 26c and the second lower intersection 26d are arranged in a staggered pattern. Furthermore, the second upper intersection 26c of the second A wire 26a and the second lower intersection 26d of the second B wire 26b may be in the same position in the Z direction, or they may be in different positions.

[0045] The positional relationships between the wires described above are achieved by the weaving method of the wires in the wire mesh 24. Examples of such weaving methods include crimp weave, flat-top weave, and rock crimp weave. However, the weaving method of the wire mesh 24 is not particularly limited, and other weaving methods may be used.

[0046] Next, a fiber scattering method using the fiber scattering device 10 described above, or more specifically, a fiber scattering method using a fiber scattering unit 100 including the fiber scattering device 10 and a vibration device 50, will be explained with reference to Figure 9. Before the poured concrete hardens, fiber fragments (hereinafter also referred to as fiber fragments F) are scattered. When scattering the fiber fragments F begins, a predetermined amount of fiber fragments F is placed into the housing 11. Then, the housing 11 containing the fiber fragments F is carried over the surface of the concrete before it hardens (hereinafter referred to as the concrete surface C), and the discharge port 16 of the housing 11 is opened. As a result, as shown in Figure 9, the housing 11 is positioned so that the discharge port 16 faces the concrete surface C before it hardens.

[0047] Subsequently, the vibration device 50 attached to the housing 11 is activated, and vibrations from the vibration device 50 are transmitted to the housing 11 via the vibration transmission unit 30. As a result, the housing 11 vibrates in the X or Y direction, and this vibration of the housing 11 causes the fiber pieces F inside the housing 11 to be discharged outside the housing 11 through the discharge port 16, as shown in Figure 9. At this time, each fiber piece F passes through the mesh 27 of the wire mesh 24. As a result, the fiber pieces F are discharged from each part of the discharge port 16. In addition, the orientation and posture of the fiber pieces F are adjusted as they pass through the mesh 27, so the orientation direction of the fiber pieces F can be controlled.

[0048] Then, the housing 11 is moved horizontally (specifically, in the X and Y directions) to change its position relative to the concrete surface C, while the scattering of fiber fragments F is continued. This allows the fiber fragments F to be uniformly scattered across all parts of the concrete surface C in the X and Y directions. In other words, the variation in the amount of fiber fragments F scattered on the concrete surface C is reduced. Furthermore, since the amount of fiber fragments F scattered (consumption) is kept to the minimum necessary, material costs and costs associated with the scattering work (construction costs) can be reduced.

[0049] Furthermore, the fiber scattering equipment 10 and fiber scattering unit 100 described above allow for the uniform scattering of fiber pieces F onto the concrete surface C with a relatively simple configuration. In particular, in this embodiment, since the vibration of the vibration device 50 is used to discharge the fiber pieces F from the housing 11, the fiber pieces F tend to spread more easily in the X and Y directions as they pass through the discharge port 16, making it easier to uniformly scatter the fiber pieces F. In addition, by using the vibration device 50, the speed of scattering the fiber pieces F can be increased compared to manually shaking the housing 11 to discharge the fiber pieces F from the housing 11.

[0050] <<Regarding other embodiments>> To date, one embodiment of the fiber scattering apparatus, fiber scattering unit, and fiber scattering method using the present invention has been described. However, the above embodiment is merely an example to facilitate understanding of the present invention and does not limit it. In other words, the present invention can be modified and improved without departing from its spirit. Furthermore, it goes without saying that the present invention includes equivalents thereof.

[0051] Furthermore, in the above embodiment, the dispensing section 22 is made of wire mesh 24. However, the dispensing section 22 is not particularly limited as long as it has multiple openings and is capable of uniformly dispensing the fiber pieces inside the housing 11. For example, the dispensing section 22 may be made of a material other than wire mesh, specifically a perforated plate or expanded metal.

[0052] Furthermore, the method for fixing the wire mesh 24 as the spraying section 22 inside the housing 11 is not particularly limited, and for example, the wire mesh 24 may be fixed to the housing 11 with adhesive or fasteners. Alternatively, as shown in Figure 10, the housing 11 may have a structure divided into upper and lower halves, and the wire mesh 24 may be fixed by sandwiching it between the flange 43 provided at the lower end of the upper housing section 41, which forms the upper part, and the flange 44 provided at the upper end of the lower housing section 42, which forms the lower part.

[0053] Furthermore, although the vibration device 50 is detachable from the housing 11 in the above embodiment, the invention is not limited to this, and the vibration device 50 may be fixed to the housing 11 in a non-removable state. In this case, the vibration device 50 may be composed of a stationary device, such as a parts feeder. [Explanation of Symbols]

[0054] 10. Equipment for spreading fibers 11. Enclosure (frame component) 12,13 X side wall 14,15 Y side wall 16 Outlet 17 Inlet 18 Handle 19. Retaining belt 20 Lid 22 Spreading section 24 Wire mesh 25 1st wire rod 25a 1st A wire rod 25b 1st B wire rod 25c First upper crossing 25d 1st lower intersection 26 2nd wire rod 26a 2nd A wire rod 26b 2nd B wire rod 26c Second upper crossing 26d 2nd lower intersection 27 Mesh (opening) 30 Vibration transmission section 31 Base Plate 32 Holding part 33,34 Retaining plate 35 connecting bolts 40 cabinets 41 Upper housing section 42 Lower housing section 43,44 Flange 50 Vibration device 100 Fiber Dispersion Units C Concrete surface F Fiber pieces

Claims

1. A housing that contains multiple fiber pieces and has an outlet, the outlet being positioned so as to face the surface of the concrete before it hardens, To discharge the fiber fragments from the housing through the discharge port, a vibration transmission unit receives vibrations applied from a vibration device and transmits the vibrations to the housing, A fiber scattering device comprising: a scattering unit having a plurality of openings located opposite the aforementioned discharge port, through which the fiber pieces are passed to scatter the fiber pieces discharged from the housing.

2. The aforementioned dispensing section is made of wire mesh, The fiber scattering device according to claim 1, wherein the plurality of openings are a plurality of mesh openings provided in the wire mesh.

3. The fiber scattering device according to claim 2, wherein the length of the fiber piece is t, the mesh opening in the wire mesh is s, and when the length of the fiber piece t satisfies the following relation (1), the mesh opening s satisfies the following relation (2). 6 mm ≤ t ≤ 65 mm (1) t / 6≦s≦3t / 2 (2)

4. The aforementioned housing is a frame member, The discharge port is provided at the lower end of the housing, and the input port is provided at the upper end of the housing. The fiber scattering apparatus according to any one of claims 1 to 3, wherein the fiber pieces are fed into the housing through the input port.

5. The fiber spreading apparatus according to claim 4, further comprising a lid that can be attached to the housing to cover the discharge port or the input port.

6. In the wire mesh, a plurality of first wires extending in a first direction and aligned in a second direction intersecting the first direction, and a plurality of second wires extending in the second direction and aligned in the first direction, intersect each other. When two adjacent first wires in the second direction are designated as the first A wire and the first B wire, and two adjacent second wires in the first direction are designated as the second A wire and the second B wire, In the wire mesh, in the area where the first A wire and the first B wire intersect with the second A wire, the first A wire is located lower than the first B wire. The fiber scattering device according to claim 2, wherein in the wire mesh, in the range where the first A wire and the first B wire intersect with the second B wire, the first B wire is located lower than the first A wire.

7. Each of the first wires alternately has a first upper intersection portion that intersects the second wire above it and a first lower intersection portion that intersects the second wire below it, in the first direction. In the first direction, the first upper intersection of the first wire A and the first lower intersection of the first wire B are located at the same position, and The fiber scattering device according to claim 6, wherein, in the first direction, the first lower intersection of the first A wire and the first upper intersection of the first B wire are arranged at the same position.

8. Each of the second wires alternately has a second upper intersection portion that intersects the first wire above it and a second lower intersection portion that intersects the first wire below it, in the second direction. In the second direction, the second upper intersection of the second wire A and the second lower intersection of the second wire B are located at the same position, and The fiber spreading device according to claim 6 or 7, wherein in the second direction, the second lower intersection of the second A wire and the second upper intersection of the second B wire are located at the same position.

9. The vibration transmission unit is provided on the side wall of the housing and has a holding unit capable of detachably holding the vibration-applying device, as described in claim 1.

10. The system comprises a fiber scattering device and a vibration device attached to the fiber scattering device, The aforementioned fiber scattering equipment is A housing that contains multiple fiber pieces and has an outlet, the outlet being positioned so as to face the surface of the concrete before it hardens, To discharge the fiber fragments from the housing through the discharge port, a vibration transmission unit receives vibrations applied from the vibration applying device and transmits the vibrations to the housing, A fiber scattering unit comprising: a scattering section having a plurality of openings located opposite the aforementioned discharge port, through which the fiber pieces are passed to scatter the fiber pieces discharged from the housing.

11. A fiber scattering method comprising scattering a plurality of fiber pieces onto the surface of concrete before it hardens, using the fiber scattering equipment described in claim 1 or the fiber scattering unit described in claim 10.

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