JP2007308854A - Resin fiber dispersing device for reinforcing concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a resin fiber-dispersing device for reinforcing concrete causes no clogging of the resin fiber for concrete reinforcement in the hopper space and can stably be used for a long period of time with inexpensive device cost. <P>SOLUTION: The rein fiber dispersing device is constituted with the conveying device that conveys a prescribed amount of resin fiber mass such as polypropylene fiber mass from the upper side face of the relatively wide space into the inside of the hopper, the rotary dispersion device for dispersing the resin fiber mass conveyed in the front of the end part of the conveying device, the upper fixed dispersion bar that is arranged in front of the rotary dispersion device so that the resin fibers splashed by the rotary dispersing machine may be allowed to stay, the lower fixed dispersion bar that is arranged at the lower part of the rotary dispersion machine and the resin fibers fallen down by the upper dispersion bar are allowed to stay and dispersed, and the blower that sucks in the resin fiber dispersed by the above-stated means in the resin fiber dispersed by the stated means and homogeneously introduced through the conveying tube to the outer kneading mixer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a resin fiber dispersing apparatus made of polypropylene or the like mixed in concrete at a certain ratio in order to improve the strength and toughness of the concrete.

  Conventionally, steel fibers having various shapes (for example, approximately S-shaped) and sizes (for example, about 30 to 80 mm in length) in order to improve the strength and toughness of the concrete (including mortar). The steel fiber is used in combination with a reinforcing bar to further improve the strength and toughness, or used instead of a reinforcing bar. However, although the steel fibers generally have good toughness characteristics, rust is generated, so that there is a problem in that the strength and toughness deteriorate due to corrosion due to secular change. Moreover, since the weight was heavy, there also existed a problem that a big installation was needed for injection | throwing-in to mixers, such as a concrete mixer.

  For this reason, in recent years, resin fibers made of polypropylene or the like have been used as concrete reinforcing fibers. The resin fiber made of polypropylene or the like is a rod-like fiber having a length of several centimeters whose surface is embossed in order to improve the adhesion with concrete and increase the tensile strength. Therefore, when the resin fiber made of polypropylene or the like is suddenly introduced into a kneader such as a concrete mixer, another problem is that the resin fibers made of polypropylene or the like are entangled with each other to form a lump and cannot be kneaded uniformly. Occurred.

  In order to solve the above-mentioned problem, for example, in “Reinforcing Fiber Input Method” of Japanese Patent No. 2510671, the reinforcing fiber group carried by the belt conveyor has a number of protrusions on the surface provided on the front end of the belt conveyor. About a reinforcing fiber feeding method in which a single fiber scraped off by a rotor is immediately put into a reinforced material (concrete) via a fiber feeding fan and an air feeding pipe, and at the same time, the reinforcing fiber and the reinforced material are kneaded. Are listed. In addition, in “Resin Fiber Supply Device” of Japanese Patent Application Laid-Open No. 2006-37241, a belt conveyor that conveys a processing object in which reinforcing fibers are gathered, a loosening processing unit that distributes the processing object and sends out the processing object, A wind-powered conveying unit that conveys the processed object by wind and discharges it to a specific position, and the unwinding processing unit is disposed at the front-down inclined guide rod and the tip of the inclined guide rod, and is conveyed by the belt conveyor. The resin fiber supply apparatus which disperse | distributes the to-be-processed object with a 1st unwinding apparatus and a 2nd unraveling apparatus is described.

Patent registration No. 2510671 JP 2006-37241 A

  However, in any of the above publications, a group of resin fibers carried by a belt conveyor to disperse resin fibers for reinforcing concrete is scraped by a plurality of rotors (rotating bodies) provided with protrusions. The hopper space in which the rotor is installed is very narrow, and there is a concern that scraped resin fibers may be clogged in the hopper space. In addition, since the failure rate is increased due to the use of a plurality of rotors, there is a concern that the above-mentioned problem will be further increased, and there is a problem that the apparatus becomes complicated and the apparatus price becomes high.

  The present invention has been made to solve the above problems, and the resin fiber for concrete reinforcement is not clogged in the hopper space, can be used stably for a long period of time, and the apparatus price is low. Another object of the present invention is to provide a resin fiber dispersing apparatus for concrete reinforcement.

  In order to solve the above-mentioned problem, in the resin fiber dispersing apparatus for concrete reinforcement of the present invention, a predetermined amount of resin fiber lump made of lump polypropylene or the like is transferred from the upper side surface portion of the hopper having a relatively wide space. A transport device that transports the resin fiber mass in front of the terminal end portion of the transport device, a rotary dispersion device that scrapes and disperses the transported resin fiber lump by a rotation mechanism, and a rotational dispersion device that is in front of the rotary dispersion device Upper fixed dispersion rod that retains and disperses the resin fibers that have been splashed by the apparatus, and lower fixed dispersion that disperses the resin fibers that have fallen from the upper fixed dispersion rod below the rotating dispersion device. It is composed of a dispersion basket and a blower that sucks the resin fibers dispersed by the above means and uniformly feeds them into an external kneader through a transport pipe.

  The rotation dispersion device is configured by radially fixing a large number of rod-like rotation dispersion rods on a rotation shaft having a length substantially the same as the lateral width of the conveying device. The shaft rod having a length substantially the same as the lateral width of the hopper is configured by providing plate-like or rod-like dispersion rods at appropriate intervals.

  According to the resin fiber dispersing apparatus for concrete reinforcement of the present invention, since the structure is simple, the rotation mechanism is minimal, and the hopper itself has a relatively wide space, the resin fiber for concrete reinforcement is the hopper. There is a great effect that it can be used stably for a long time without being clogged in the space, and the apparatus price can be provided at a low price.

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

  FIG. 1 is a schematic side sectional view showing the structure of a resin fiber dispersing apparatus for concrete reinforcement according to the present invention. As shown in the figure, the concrete reinforcing resin fiber dispersing apparatus 1 is configured such that a predetermined amount of resin fiber mass 5 made of lump-shaped polypropylene or the like is disposed from the upper side surface of the hopper 2 having a relatively wide space. A conveying device 3 that conveys the resin fiber mass 5 in front of the terminal end portion of the conveying device 3, and a rotating and dispersing device 7 that scrapes and disperses the resin fiber mass 5 that is conveyed by a rotating mechanism; An upper fixed dispersion rod 10 that retains and disperses the resin fibers 5a splashed by the rotation dispersion device 7 and a resin that falls below the rotation dispersion device 7 and falls from the upper fixed dispersion vessel 10 The lower fixed dispersion basket 11 that retains and disperses the fibers 5a, and the resin fibers 5a dispersed by the above means are sucked and uniformly fed into an external kneader through the transport pipe 15. Constitute at blower 14.

  As the transport device 3, a belt conveyor in which the endless belt 4 is transported and driven by the rotary shaft 6 is suitable, and a resin fiber lump 5 made of a predetermined amount of polypropylene or the like is placed on the endless belt 4, It is conveyed into the hopper 2 at a predetermined speed.

  The rotational dispersion device 7 is configured by radially fixing a large number of rod-shaped rotational dispersion rods 9 on a rotational shaft 8 having a length substantially the same as the lateral width of the transport device 3.

  The upper fixed dispersion rod 10 and the lower fixed dispersion rod 11 are configured by providing a plate-like or rod-like dispersion rod at an appropriate interval on a shaft rod having substantially the same length as the lateral width of the hopper 2. FIG. 2 is a plan view of the fixed dispersion basket in FIG. 1, (a) shows a dispersion basket having a plate shape, and (b) shows a dispersion basket having a rod shape. In (a), a large number of plate-shaped dispersion rods 18a are provided at right angles so as to form the gaps 19 with respect to the plate-shaped shaft rod 17a, and in FIG. Are provided at right angles so as to form the gap 19. The above-described structure shows one embodiment, and the structure having the same function is included in the present invention.

  Next, the operation principle of the resin fiber dispersing apparatus 1 for concrete reinforcement of the present invention will be described with reference to the drawings.

  First, as shown in FIG. 1, a resin fiber lump 5 made of a predetermined amount of polypropylene or the like is placed on an endless belt 4 of a belt conveyor that is a conveying device 3, and conveyed into the hopper 2 from the upper side surface of the hopper 2. To do. The means for placing the resin fiber mass 5 on the endless belt 4 is performed by a separate hopper (not shown) at the tip of the transport device 3.

  The resin fiber mass 5 on the endless belt 4 is scraped and dispersed in the direction of the arrow in the drawing by the rotation dispersion bar 9 of the rotation dispersion device 7 installed in front of the terminal end of the conveying device 3. At this time, the resin fiber 5a is splashed forward by the rotary dispersion rod 9 that rotates at a relatively high speed. In addition, an upper fixed dispersion basket 10 is installed in front of the rotation dispersion device 7, and the splashed resin fibers 5a are retained and further dispersed. In FIG. 1, the upper fixed dispersion basket 10 and the rotational dispersion basket 9 have an overlapping portion. However, as shown in FIG. 2, each rotary dispersion basket 9 passes through the gap 19 of the upper fixed dispersion basket 10 so as to pass through the rotation axis. By fixing to 8, the rotational dispersion basket 9 of the rotary dispersion device 7 and the dispersion basket 18 of the upper fixed dispersion basket 10 do not come into contact with each other.

  Next, the resin fibers 5 a dispersed and dropped from the gap portion 19 of the upper fixed dispersion basket 10 are further retained and dispersed by the lower fixed dispersion basket 11 installed at the lower part on the opposite side of the upper fixed dispersion basket 10.

  The resin fiber 5a dispersed as described above passes through the communication path 13 together with the outside air sucked from the air suction hole 12 by the blower 14, and further passes through the transport pipe 15 to be a kneader such as an external concrete mixer. Will be charged uniformly.

  In addition, the measuring apparatus 16 which connected various sensors to the vicinity of the conveying apparatus 3, the conveyance pipe | tube 15, etc. is installed, the conveyance amount of the resin fiber lump 5 conveyed by the conveying apparatus 3, and the resin fiber thrown into the kneader If feedback control is performed on the input amount 5a by a control device (not shown), a more uniform input amount can be controlled.

It is a side cross-sectional schematic diagram which shows the structure of the resin fiber dispersion | distribution apparatus for concrete reinforcement of this invention. FIG. 2 is a plan view of a fixed dispersion basket in FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin fiber dispersing device for concrete reinforcement 2 Hopper 3 Conveying device 4 Endless belt 5 Resin fiber lump 5a Resin fiber 6 Rotating shaft 7 Rotating dispersion device 8 Rotating shaft 9 Rotating dispersion rod 10 Upper fixed dispersion rod 11 Lower fixed dispersion rod 12 Air suction Hole 13 Communication path 14 Blower 15 Transport pipe 16 Measuring device 17 Shaft rod 18 Dispersion rod 19 Gap

Claims (2)

  A conveying device that conveys a predetermined amount of resin fiber lump made of lump-shaped polypropylene or the like into the hopper from the upper side surface portion of the hopper having a relatively wide space, and the conveying device that is conveyed in front of the end portion of the conveying device. A rotary dispersion device that scrapes and disperses a resin fiber lump by a rotation mechanism, and an upper fixed dispersion cage that retains and disperses the resin fibers that are in front of the rotation dispersion device and have been bounced off by the rotation dispersion device A lower fixed dispersion bottle that is located below the rotary dispersion device and retains the resin fibers dropped from the upper fixed dispersion bottle to disperse the resin fibers dispersed by the means, and a transport pipe A resin fiber dispersing apparatus for concrete reinforcement, characterized by comprising a blower that is uniformly fed into an external kneader.   The rotation dispersion device is configured by radially fixing a large number of rod-like rotation dispersion rods on a rotation shaft having a length substantially the same as the lateral width of the conveying device. 2. The resin fiber dispersion device for concrete reinforcement according to claim 1, wherein a plate rod or rod-like dispersion rod is provided at an appropriate interval on a shaft rod having a length substantially the same as the horizontal width of the shaft.

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