JP2006044140A - Feeder of concrete reinforcing fiber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a feeder of concrete reinforcing fiber capable of unravelling entangled reinforcing fibers to be mixed in ready mixed concrete, uniformly dispersing and feeding the fibers to an agitator vehicle. <P>SOLUTION: The fed fiber F is unravelled to the outside (the inner wall of a housing 2) and is dispersed by an upper rotating and dispersing part 7 and a lower rotating and dispersing part 9, both rotating within the housing 2. The fiber F falling down collides with an upper dispersing body 15a and a lower dispersing body 15b and randomly changes its falling velocity and direction, and therefore a lot of the assembled fiber does not fall down at one time but falls down while being dispersed. The fiber F falling down in the upper part of the central portion of the lower rotating and dispersing part 9 is pushed up by a pushing-up blade, is again unravelled to the outside and is dispersed by the upper rotating and dispersing part 7 and the upper dispersing body 15a. The dispersed fiber falls down on a slope of a funnel-like discharging part 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a concrete reinforcing fiber supply device, and more particularly, to supply concrete reinforcing fibers that can be supplied to an agitator vehicle by untangling the reinforcing fibers mixed in the ready-mixed concrete and dispersing them evenly. It relates to the device.

  Conventionally, concrete reinforcing fibers are mixed in concrete used for mountain tunnel lining concrete to improve toughness and prevent exfoliation. The mixing of reinforcing fibers into the ready-mixed concrete is often due to human power, and the reinforcing fibers cannot be mixed stably, resulting in uneven mixing or entanglement of the reinforcing fibers, It may cause the strength of concrete to decrease.

  In view of this, a low-pressure pumping device that can efficiently and quantitatively mix reinforcing fibers into mortar or concrete has been proposed (see, for example, Patent Document 1). In this proposal, the steel fibers are loosened by the steel fiber supply mechanism, and then the steel fibers are supplied to the chute, dispersed and mixed in the high-speed air jet injected from the nozzle, and converted into a low-pressure air flow through the low-pressure transport pipe. The steel fiber is pumped to a predetermined supply destination.

  However, this proposed steel fiber supply mechanism is one in which the sieve is vibrated in the horizontal direction by the vibration mechanism to loosen the steel fibers, and it is difficult to loosen and disperse the steel fibers sufficiently so that they do not become lumps. It was. For this reason, the steel fibers are unlikely to fall from the chute and may accumulate in the middle, or the steel fibers may be entangled during the pressure feeding by the low pressure transport pipe.

In this way, if steel fibers become lumped and supplied to ready-mixed concrete without being dispersed, the predetermined concrete strength and the like may not be ensured. There was a need for a mixing method and apparatus.
JP-A 63-267614

  An object of the present invention is to provide an apparatus for supplying concrete reinforcing fibers, which can loosen the entanglement of reinforcing fibers mixed in the ready-mixed concrete and uniformly distribute them to agitator vehicles.

In order to achieve the above object, the concrete reinforcing fiber supply device of the present invention is a concrete reinforcing fiber supply device that loosens and disperses the concrete reinforcing fiber and supplies it to the agitator vehicle, the lower end portion of which is funnel-shaped. A housing, an upper rotational dispersion portion and a lower rotational dispersion portion that are located above the funnel-shaped portion of the housing and are disposed below the supply port of the fiber supply chute and are spaced apart in the vertical direction; and the lower rotational dispersion portion A lower dispersion body disposed below and a blower connected to a lower end portion of the housing, wherein the upper rotation dispersion portion is composed of rod-like flexible dispersion blades rotating in the housing, The rotation dispersion portion is composed of a push-up blade rotating in the housing and a rod-like flexible dispersion blade extending outward from the push-up blade. It is intended.

  According to the concrete reinforcing fiber supply device of the present invention, the lower end portion is located above the funnel-shaped housing and the upper and lower portions disposed below the supply port of the fiber supply chute. An upper rotational dispersion portion and a lower rotational dispersion portion that are spaced apart from each other, a lower dispersion member disposed below the lower rotational dispersion portion, and a blower connected to a lower end portion of the housing. It consists of a rod-like flexible dispersion blade rotating inside, and the lower rotation dispersion portion is composed of a push-up blade rotating inside the housing and a rod-like flexible dispersion blade extending outward from this push-up blade. With this structure, the slope of the funnel-shaped portion can be slid down while loosening and dispersing the concrete reinforcing fibers by the upper rotation dispersion portion and the lower rotation dispersion portion.

  Since the fibers collide with the lower dispersion moderately and the dropping speed and direction change randomly, the fibers can be dropped while being dispersed in a large amount without being solidified at a time.

  Furthermore, the fibers that fall above the center of the lower rotation dispersion unit are pushed upward by the push-up blades and are loosened and dispersed again by the upper rotation dispersion unit.

  As described above, the entanglement of the concrete reinforcing fiber can be loosened and distributed almost evenly, so that the funnel-shaped portion of the housing is not blocked, and this fiber is applied to the agitator car with a general specification blower. It becomes possible to supply. Thereby, a fixed amount of fibers can be mixed in the ready-mixed concrete in a uniformly dispersed state, and a predetermined concrete strength can be ensured.

  Hereinafter, the concrete reinforcing fiber supply device of the present invention will be described based on the embodiments shown in the drawings. FIG. 2 shows an overall front view of the concrete reinforcing fiber supply device 1 as seen through. This supply device 1 includes a fiber supply chute 3 for supplying a constant amount of concrete reinforcing fiber F (hereinafter referred to as fiber F) and various devices for dispersing the supplied fiber F, and has a funnel-like shape at the lower end. A cylindrical housing 2 having a discharge portion 16 and a blower 17 that supplies the evenly dispersed fibers F discharged from the discharge portion 16 to an agitator wheel are provided.

  A rotary motor 5 is disposed in the upper part of the housing 2, and a rotary shaft 6 extends downward from the center of the housing 2 in the cylindrical axis direction. An upper rotational dispersion portion 7 is attached to the rotary shaft 6 at a position below the supply port of the fiber supply chute 3, and a lower rotational dispersion portion 9 is attached below the upper rotational dispersion portion 7 by a predetermined interval. In order to increase the dispersion effect, the predetermined interval in the vertical direction between the upper rotation dispersion unit 7 and the lower rotation dispersion unit 9 is larger than the length of the supplied fiber, for example, 6 to 15 cm, more preferably 7 to 8 cm. To a degree.

  The upper rotation dispersion portion 7 is composed of two rod-like upper flexible dispersion blades 8, one end of each flexible dispersion blade 8 is fixed to the rotation shaft 6 and the other end is free. It is the end. The flexible dispersion blades 8 are entirely or partially formed of an elastic body such as rubber or soft resin, and the number thereof is appropriately selected as about 2 to 4.

  As shown in the plan view of FIG. 4, the lower rotation dispersion portion 9 includes a push-up blade 10 inscribed in the outer peripheral ring 11 at the center and a rod-like lower flexible dispersion extended outward from the outer peripheral ring 11. It is composed of blades 12 and is fixed to the rotating shaft 6 at the center. The blade 10a of the lifting blade is set in a direction in which the fiber F is pushed up when the lower rotation dispersion unit 9 rotates. The lower flexible dispersion blade 12 is formed of an elastic body similar to the upper flexible dispersion blade 8. The number of the push-up blades 10a and the lower flexible dispersion blades 12 is three (three), but the number is appropriately selected as about 2 to 4. In this embodiment, the push-up blades 10a and the lower flexible dispersion blades 12 are provided so as to coincide with each other in a radial manner, but they can be provided in a shifted manner. Moreover, the lower flexible dispersion | distribution blade | wing 12 can also be extended from the blade | wing 10a of a raising blade | wing, without providing the outer periphery ring 11. FIG.

  As shown in FIG. 3, the upper dispersion body 15a has an opening through which the rotating shaft 6 is inserted, and the frame member extends radially from the inner ring forming the opening to the outer ring. The frame members are arranged radially at predetermined intervals so that the fibers F are not clogged. The lower dispersion body 15b has a disk-shaped vibration dispersion plate 13 having a convex shape at the center, and a frame member extends radially outward from the vibration dispersion plate 13. As shown in FIG. 1, a ball vibrator 14 is attached to the lower portion of the vibration dispersion plate 13 so as to vibrate the vibration dispersion plate 13 at least in the vertical direction.

  In this embodiment, the upper dispersion body 15a and the lower dispersion body 15b are connected by a frame material to form a dispersion auxiliary cage 15 having a trapezoidal conical frame structure. That is, the outer diameter of the upper dispersion 15a is smaller than the outer diameter of the lower dispersion 15b. Thereby, the fibers F falling from above can be passed smoothly without being clogged with the dispersion assisting cage 15. Note that only the lower dispersion 15b may be provided without providing the upper dispersion 15a.

  The distance in the height direction between both dispersions 15a and 15b is preferably larger than the length of the fibers F, for example, about 4 to 15 cm, more preferably about 4 to 7 cm so that the fibers F are not clogged.

  The frame material constituting the dispersion assisting cage 15 is a frame member that is hard to accumulate fibers F as a rigid body having a circular cross section and can maintain a trapezoidal conical structure. It is preferable that the vibration dispersion plate 13 can vibrate at least in the vertical direction with respect to the dispersion auxiliary basket 15 by using a wire that is relatively easily deformed.

  One end of a wire 19 is connected to the lower dispersion body 15 b and the other end of the wire 19 is connected to a fixed piece 20 projecting from the inner wall of the housing 2 and suspended inside the housing 2. ing. For the suspension, not only the wire 19 but also various suspensions can be used, but the dispersion assisting cage 15 is at least vertically with respect to the housing 2 by using an elastic body such as a spring in whole or in part. It is preferable to be able to swing. In FIG. 3, there are three hanging places, but it can be, for example, about 3 to 5 places.

  The suspension position of the dispersion auxiliary basket 15 with respect to the housing 2 is such that the lower dispersion body 15b is close to the upper end surface of the funnel-shaped discharge portion of the housing 2 in the vertical direction, and is also predetermined in the planar direction. The space | interval which can pass the fiber F between the lower dispersion 15b and the inner wall of the housing 2 is ensured so that a space | interval may be provided. Specifically, as shown in FIG. 1, the distance B between the lower dispersion 15b and the funnel-shaped slope of the discharge portion 16 is 3 to 10 cm, more preferably about 4 to 6 cm, and the outer periphery of the lower dispersion 15b and the housing When the distance C from the inner wall 2 is 3 to 10 cm, more preferably about 4 to 6 cm, the fibers F can easily pass through in a dispersed state.

  As shown in FIG. 1, the lower rotation dispersion unit 9 is rotatably disposed in the dispersion auxiliary basket 15, and the upper rotation dispersion unit 7 is rotatably disposed above the dispersion auxiliary basket 15.

  The inclination angle A of the slope of the funnel-shaped discharge portion 16 provided at the lower end of the housing 2 is 30 to 50 °, more preferably about 40 ° with respect to the horizontal line. This is because if the inclination angle A is smaller than 30 °, the fibers F are less likely to slide on the slope, and if the inclination angle A is larger than 50, the discharge part 16 becomes longer, which is disadvantageous in terms of space and cost.

  As shown in FIG. 2, the fiber supply chute 3 includes a vibration device 4 that vibrates the fiber supply chute 3. The blower 17 connected to the lower end of the housing 2 is not a special specification, and a general one can be used. The concrete reinforcing fiber supply device 1 is loaded on the carriage 18 and is movable.

  When the fiber F intertwined in the fiber supply chute 3 is placed on the fiber supply chute 3, the fiber F is loosened moderately by the vibration of the vibration device 4, and is supplied to the housing 2 in a fixed amount. Note that the fiber F can be supplied to the inside of the housing 2 as it is without providing the vibration device 4.

  Inside the housing 2, the rotary shaft 6 is rotated by the rotary motor 5, and the upper rotation dispersion unit 7 and the lower rotation dispersion unit 9 are rotated accordingly. In the upper rotation dispersion part 7, the upper flexible dispersion blade 8 rotates in the housing 2 while making a random movement while making a whip, and the supplied fiber F is mainly outside (inner wall of the housing 2). Disperse to loosen toward.

  The fibers F that have passed through the upper rotating dispersion unit 7 and have fallen downwardly collide with the frame material of the upper dispersion 15a, change the falling speed and direction at random, and fall in a large amount at once. It falls without being dispersed.

  Further, when the fiber F falls, the lower flexible dispersion blades 12 of the lower rotation dispersion unit 9 rotate in the dispersion auxiliary basket 15 while making a random movement while acting like a whip. Disperse to loosen outward. Here, the fibers F falling on the upper portion of the lower rotation dispersion portion 9 are pushed upward by the lifting blades 10 and are loosened outward again by the upper rotation dispersion portion 7 and the upper dispersion body 15a. To be distributed.

  Further, when the fiber F falls, it moderately collides with the frame material of the lower dispersion 15b and the dropping speed and direction change randomly, so that the fiber F does not harden and fall at once but falls while being dispersed. At this time, the fiber F dropped on the center portion in the plane direction of the lower dispersion 15b is placed on the vibration dispersion plate 13, and is bounced upward and dispersed while being loosened by the vibration of the ball vibrator 14, and directed outward. And fall.

  When the dispersion auxiliary basket 15 is entirely or partly suspended by a lifting tool made of an elastic body such as a spring, the entire dispersion auxiliary basket 15 randomly swings at least up and down, so that the fibers F are further dispersed. be able to. Further, by attaching the vibration dispersion plate 13 to the lower dispersion body 15b with a wire or the like without being fixed by welding or the like, the vibration dispersion plate 13 can be randomly vibrated at least up and the dispersion effect of the fibers F can be improved.

  As described above, the fibers F that have been loosened and dispersed are blown toward the inner wall of the housing 2, travel along the inner wall of the housing 2, pass through the gap between the lower dispersion body 15 b and the inner wall of the housing 2, and funnel. Slide down the slope of the discharge section 16. On the other hand, the fibers F that are not blown to the inner wall of the housing 2 but fall through the dispersion auxiliary basket 15 are loosened and dispersed by the lower rotating dispersion portion 9, the dispersion auxiliary basket 15, and the vibration dispersion plate 13 to form a funnel shape. Falls on the slope of the discharge part 16 and slides down.

  As described above, the fibers F are loosened and dispersed almost evenly, so that the discharge port 16a of the funnel-shaped discharge portion is not blocked, and the fiber F is not shown smoothly through a supply pipe (not shown) by the blower of the blower 17. A fixed amount can be supplied to the tank of the agitator car. Further, since the fibers F are almost uniformly dispersed, the fibers F are not clogged in the supply pipe and the resistance in the pipes is not increased. Therefore, the blower 17 is not a special specification but a general specification. Can respond.

  Specifically, at the construction site, this evenly dispersed fiber F is quantitatively supplied to the agitator vehicle loaded with ready-mixed concrete and mixed into the ready-mixed concrete in the tank of the agitator vehicle. Therefore, the fiber F can be mixed with the ready-mixed concrete in a state of being uniformly dispersed without being lumped, and a predetermined concrete strength can be ensured.

It is a longitudinal cross section inside a housing which shows the operating condition of the supply apparatus of the fiber for concrete reinforcement of this invention. It is a partially transparent front view which shows the whole supply apparatus of the fiber for concrete reinforcement of this invention. It is a perspective perspective view which shows an example of the structure of the dispersion | distribution auxiliary | assistant basket inside the housing which concerns on this invention. It is a top view which shows the structure of the lower dispersion which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Supply apparatus of concrete reinforcement fiber 2 Housing 3 Supply chute 4 Vibrating device 5 Rotating motor 6 Rotating shaft 7 Upper rotation dispersion | distribution part 8 Upper flexible dispersion | distribution blade | wing 9 Lower rotation dispersion | distribution part 10 Push-up blade | wing 10a Push-up blade | wing 11 Peripheral ring 12 Lower flexible dispersion blade 13 Vibration dispersion plate 14 Ball vibrator 15 Dispersion auxiliary basket 15a Upper dispersion body 15b Lower dispersion body 16 Funnel-shaped discharge portion 16a Discharge port 17 Blower 18 Blower 18
19 Hanging wire 20 Fixed piece

Claims (6)

  A concrete reinforcing fiber supply device for loosening and dispersing concrete reinforcing fibers and supplying them to an agitator vehicle, wherein the lower end portion is located above the funnel-shaped housing, and the fiber supply Connected to the upper and lower rotational dispersion portions disposed below the chute supply port and spaced apart in the vertical direction, the lower dispersion disposed below the lower rotational dispersion portion, and the lower end portion of the housing The upper rotation dispersion part is composed of a rod-like flexible dispersion blade rotating in the housing, and the lower rotation dispersion part is a push-up blade rotating in the housing and the push-up blade. A concrete reinforcing fiber supply device, comprising: a rod-like flexible dispersion blade extending outward from the outside.   The lower dispersion body has a disc-like vibration dispersion plate that can vibrate at least in the vertical direction at the center, has a gap between the outer edge and the inner wall of the housing, and the upper end of the funnel-shaped portion of the housing in the vertical direction. The apparatus for supplying concrete reinforcing fibers according to claim 1, wherein the apparatus is disposed so as to be close to a position.   The concrete reinforcing fiber supply device according to claim 1, wherein the lower dispersion body is swingable at least in the vertical direction with respect to the housing. An upper dispersion smaller than the lower dispersion is provided between the upper rotation dispersion portion and the lower rotation dispersion portion, and the upper dispersion and the lower dispersion are connected to form a trapezoidal conical frame. The supply apparatus of the fiber for concrete reinforcement in any one of Claims 1-3.   The concrete reinforcing fiber supply device according to any one of claims 1 to 4, wherein an inclination of the funnel-shaped portion of the housing is 30 to 50 ° with respect to a horizontal line.   6. The apparatus for supplying concrete reinforcing fibers according to claim 1, wherein a fiber supply chute with a vibration device for supplying concrete reinforcing fibers to the housing is provided.

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