JP2568196Y2 - Spray nozzle for fiber reinforced solidified material - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray nozzle for a fiber-reinforced solidified material used in the field of construction and civil engineering, and more particularly to an improvement in a nozzle for spraying a solidified material such as mortar reinforced by short fibers.

[0002]

2. Description of the Related Art Conventionally, as a nozzle for spraying a fiber-reinforced solidified material of this type, for example, disclosed in Japanese Utility Model Publication No. 2-33886, an inner pipe is provided at a central portion for ejecting reinforcing fibers, and an inner pipe for discharging the reinforcing fibers. It has a double-pipe structure which is arranged around the outer circumference so as to surround it, and which comprises an outer pipe which blows out a solidifying material such as mortar or concrete. Then, the reinforcing fiber and the solidified material are individually transferred to the inner pipe or the outer pipe, and when ejected, the two are mixed and sprayed. The blowing nozzle is configured to prevent the solidified material from stagnating in the outer tube by sending compressed air into the space in the outer tube, and to smoothly move and eject the solidified material to the tip nozzle portion.

[0003]

However, in the above-described spray nozzle, the tip opening of the inner tube and the tip nozzle opening of the outer tube are opened at the same position, and are ejected from each. Since the reinforcing fibers and the solidified material are diffused and mixed in the air, there has been a problem that the mixing ratio tends to be uneven.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a fiber-reinforced solidified material spray nozzle capable of spraying a reinforcing fiber and a solidified material in a uniformly mixed state. It is in.

[0005]

According to the present invention, there is provided a curved tube for ejecting a solidified material.
An outer tube, and a nozzle opening at the tip of the outer tube, which penetrates the outer tube;
To be laid out on the same axis as the side center axis to eject reinforcing fibers
Of the spray nozzle of the double pipe structure composed of an inner tube of the straight tube, the tip end opening portion of the inner tube is disposed the inner tube so as to be positioned behind the front end nozzle port of the outer tube opening and Rutotomoni provided <br/> mixing section between the solidifying material and the reinforcing fibers between the tip nozzle opening, the distal end opening position of the inner tube tone
The inner tube can be slid along the central axis to align
Characterized in that was.

[0006]

In the above construction, the reinforcing fibers are ejected into the mixing section from the opening at the end of the inner tube, and the solidified material is ejected from the nozzle opening at the end through the mixing section. The mixture is sufficiently mixed without being diffused in the portion, and mixing unevenness is eliminated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a side sectional view of a spray nozzle for a fiber-reinforced solidified material according to the present invention, and FIG. 2 is an overall configuration diagram of a spray device to which the nozzle of FIG. 1 is applied.

A spray nozzle 10 shown in FIG. 1 has a straight tubular inner pipe 11 for ejecting reinforcing fibers A,
1 is a double-pipe structure which is arranged so as to surround the outer periphery of the outer pipe 1 and which includes an outer pipe 12 for ejecting a solidifying material B such as concrete or mortar, and an inner pipe 11 and an outer pipe 12.
Are both made of nylon.

The rear end of the inner tube 11 has a reinforcing fiber transport tube 21 connected at one end to a roving cutter 20 shown in FIG.
Are connected to each other. On the other hand, the rear end of the outer tube 12
In order to branch off from the inner tube 11, it is fitted into a bent aluminum housing 14 having a through portion 13 of the inner tube 11. The housing 14 is connected to a squeeze-type mortar pump 30 shown in FIG. 2 via a solidifying material transport pipe 32, and mortar is supplied to the squeeze-type mortar pump 30 from a pan-type mortar mixer 31. Further, a rubber tip nozzle port 15 is fitted to the tip of the outer tube 12, and the tip of the tip nozzle port 15 is reduced in diameter.

The inner tube 11 and the outer tube 12 are disposed so that the opening at the tip of the inner tube 11 is located behind the nozzle opening 15 at the end of the outer tube 12. A mixing portion 16 is formed between the tip opening of the nozzle 11 and the tip of the tip nozzle port 15.

Further, an outer tube 12 is provided at an intermediate portion of the outer tube 12.
An annular space 18 is formed by fixing a ring member 17 having a larger diameter U-shaped cross section, and a plurality of through holes arranged at equal angular intervals in the circumferential direction are formed in the outer tube 12 in the annular space 18. 19, 19 are drilled. Compressed air C is supplied into the annular space 18 via an air pipe 41 connected to a compressor 40 shown in FIG. The compressed air of the compressor 40 is also supplied to the roving cutter 20 via the air pipe 42. In addition, it is preferable that the through holes 19 are formed to be inclined toward the tip.

In the spray nozzle 10 configured as described above, the reinforcing fibers A are pressure-fed into the inner pipe 11 from the roving cutter 20 through the reinforcing fiber transporting tube 21 by the compressed air sent from the compressor 40. This reinforcing fiber A is further pressure-fed from the opening at the distal end of the inner pipe 11 to the mixing section 16 in the outer pipe 12. On the other hand, the solidified material B sent from the pan-type mortar mixer 31 is ejected from the outer tube 12 by the squeeze-type mortar pump 30, and the reinforcing fibers A and the solidified material B diffuse in the mixing section 16 of the outer tube 12. Mix well without doing. The mixed fiber reinforced solidified material has a uniform mixing ratio, and the uniform fiber reinforced solidified material is sprayed from the tip nozzle port 15 onto a construction wall or the like.

As described above, in the present invention, since the mixing of the reinforcing fiber and the solidified material is performed without being diffused in the mixing section inside the outer tube, the mixture is sufficiently mixed, the mixing ratio becomes uniform, and the spraying is performed in an even state. Becomes possible.

In the present invention, the inner tube 11 is replaced by the outer tube 12
It has been allowed to slide axially with respect to, in this
Thus, it is possible to perform the spraying while adjusting the opening position of the distal end of the inner tube 11 to an optimal positional relationship according to the properties of the reinforcing fibers A and the solidified material B.

[0015]

As described above, according to the spray nozzle for fiber-reinforced solidified material of the present invention, the mixing of the reinforcing fiber and the solidified material is performed inside the nozzle tip of the outer tube, so that these are not diffused. Spraying can be performed in a sufficiently mixed state, and the sprayed fiber-reinforced solidified material adheres well to the wall surface, so that the quality of the finished material can be improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a spray nozzle for a fiber-reinforced solidified material according to the present invention.

FIG. 2 is a side view of a spraying apparatus for a fiber-reinforced solidified material to which the present invention is applied.

[Description of Signs] 11 Inner tube 12 Outer tube 15 Tip nozzle port 16 Mixing section A Reinforcing fiber B Solidified material

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshimasa Hayashi 4-640 Shimoseito, Kiyose-shi, Tokyo Co., Ltd. Inside Obayashi Corporation Technical Research Institute (72) Haruka Ogawa 4-640 Shimoseito, Kiyose-shi, Tokyo Stock Inside the Obayashi Corporation Technical Research Institute (72) Atsushi Nakane 4-640 Shimoseito, Kiyose-shi, Tokyo Co., Ltd. Inside the Obayashi Corporation Technical Research Institute (72) Etsunori Tamura 2-3-3 Kandajicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo head office (72) Inventor Masao Kawahara 2-22 Bentendori, Naka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Obayashi Corporation Yokohama Branch (56) References JP-A-63-39655 (JP, A) JP, Y2)

Claims (1)

(57) [Scope of request for utility model registration] A curved outer tube for ejecting a solidified material.
And penetrates the outer tube, and the inside of the outer tube at the tip nozzle end side.
A straight line is located coaxially with the mandrel to eject reinforcing fibers.
In spray nozzle of the double pipe structure composed of an inner tube of the tubular, and arranged inner tube so that the tip end opening of the inner tube is positioned behind the front end nozzle port of the outer tube distal end opening the to adjust the setting <br/> only Rutotomoni the mixed-portion of the solidifying material and the reinforcing fibers between the tip nozzle opening, the distal end opening position of the inner tube
A spray nozzle for a fiber-reinforced solidified material , wherein the inner pipe is slidable along the central axis .