JPH07102770A - Spraying execution method of waterproof material and the like, and spray nozzle - Google Patents

Abstract

PURPOSE:To mix a waterproof material mixture and an accelerating agent sufficiently, to prevent the clogging of a nozzle and to simplify even mainte nance. CONSTITUTION:Reinforced fibers, a waterproof material and an accelerating agent are force-fed discretely through a compressor 4, and the reinforced fibers and the waterproof material are mixed in a spray nozzle 5. The accelerating agent is jetted under a crossed state from a mixing ring 15 arranged at the ejection front end of a mixture blown out from a nozzle port 12a, and sprayed against a coated surface 20 under a mixed and reacted state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying method for a waterproof material reinforced with short fibers, mortar such as cement mortar and concrete (hereinafter referred to as waterproof material), and a spray nozzle used therefor. .

[0002]

2. Description of the Related Art Conventionally, when spraying a waterproof coating layer of, for example, urethane rubber, acrylic rubber, rubber asphalt, etc., an increase in resistance to zero spantion of waterproof coating is ensured and a waterproof material is applied. A method of interposing a reinforcing fiber is adopted for the purpose of preventing sagging. One of the methods is to spray and apply the reinforcing fibers to the construction site while mixing the reinforcing fibers into the waterproof material. According to this method, since the reinforcing short fibers are uniformly and three-dimensionally dispersed in the waterproof layer in a random state, there is an advantage that there is no directionality and a waterproof layer having a large tensile product can be formed.

As a concrete spraying method, for example, in Japanese Patent Laid-Open No. 1-218666, a mixture of asphalt and fibers is sprayed from the tip of a spraying nozzle toward a coated surface, and a nozzle arranged in parallel with this nozzle is used. By spraying the coagulation liquid (quick-setting agent) toward the same coated surface,
It promotes the curing of the sprayed fiber reinforced waterproof material.

Further, in Japanese Patent Publication No. 62-60557, a base material (sprayed concrete) and a quick-setting agent are mixed in advance in a pipe and sprayed on the wall surface of a tunnel through a nozzle.

However, in either method,
There were the following problems in the method of mixing the quick-setting agent.

[0006]

That is, in the former method, since the mixture and the quick-setting agent are sprayed from a nozzle having a peer relationship with a multi-head nozzle, the quick-setting agent is biased with respect to the mixture. Mixing causes unevenness. Further, there is a drawback that skill is required in operating the nozzle.

[0007] In the latter case, the solidification occurs before passing through the nozzle, the viscosity increases, the nozzle is clogged, the load of the pressure feed pump is increased, and maintenance such as cleaning the nozzle after use is frequently performed. There was a drawback that had to be made.

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a spraying method and a spraying nozzle for a waterproof material and the like, in which the waterproof material and the quick-setting admixture can be sufficiently mixed, the nozzle is not clogged, and maintenance is easy. And

[0009]

In order to achieve the above object, the method of the present invention is to eject a quick-setting agent simultaneously with a waterproof material from a plurality of ejection holes arranged at equal intervals around the tip of a spray nozzle. The method of spraying a waterproof material, etc. Furthermore, in the case of using reinforcing fibers in addition to these waterproof materials, the reinforcing fibers, the waterproof material, and the quick-setting agent are separately fed under pressure through a compressor, and the reinforcing fibers and the waterproof material are mixed in a spray nozzle. Then, the above-mentioned quick-setting admixture is mixed in a crossing state at the jetting tip of the mixture jetted from the nozzle port, and is sprayed on the coated surface in a state of reacting. Further, in the method of the present invention, the reinforcing fibers are mixed and dispersed in a waterproof material in advance, the mixture is pressure-fed into a spray nozzle, and the quick-setting agent that is pressure-fed by another path through the other path of the compressor is ejected from the nozzle opening. It is also possible to mix and react in a crossed state at the ejection tip of the mixture to be produced.

Further, the spray nozzle of the present invention is arranged on the outer periphery of the tip of the nozzle for spraying the waterproof material with or without the reinforcing fiber mixed therein, and the quick-setting agent is swirled toward the inside of the nozzle in the spray direction. Is provided with a mixing ring for ejecting. The spray nozzle encloses the inner tube for ejecting the reinforcing fiber and the outer periphery of the inner tube, and the outer tube ejects the waterproof material by obliquely intersecting the ejection direction of the reinforcing fiber of the inner tube. And a configuration in which the mixing ring is provided on the outer periphery of the tip of the nozzle opening can be employed.

[0011]

According to the above method, the quick-setting agent is relatively evenly mixed from the surroundings toward the waterproof material ejected from the spray nozzle, and the reaction material is sprayed on the coated surface in a state where the reaction has started. In the method in which the reinforcing fiber and the waterproof material are pressure-fed by another route and mixed in the nozzle, the viscosity does not increase and the pressure-feed resistance is reduced.

Further, in the spray nozzle of the present invention,
The quick-setting agent that is jetted in a vortex from the mixing ring enables efficient mixing. That is, the use of the mixing ring allows the quick-setting agent to be mixed almost at the same time as the jetting, and the swirling jet causes more crossing of the waterproof material being jetted.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 to 3 show a first embodiment of the method of the present invention. FIG. 1 shows the overall structure of the apparatus used in the method of the present invention, FIG. 2 shows the details of a spray nozzle, and FIG. Details of each mixing ring are shown.

In FIG. 1, the spraying apparatus comprises a waterproof material pump 1, a roving cutter 2 for continuously processing reinforcing fibers, a quick-setting agent pump 3, an air compressor 4, and a spraying nozzle 5 connected to these. It has and.

As the waterproof material pumped by the waterproof material pump 1, rubber asphalt or a hardening material such as mortar, urethane rubber, or acrylic rubber is used in addition to this. When the waterproof material is rubber asphalt, an aqueous calcium chloride solution is selected as the quick-setting agent. Further, air hoses 8 and 9 of which one end is connected to the air compressor 4 are connected to the pressure-feeding hoses 6 and 7 of these pumps 1 and 3,
The mixture of air and gas is sent under pressure to the spray nozzle 5 side.

The roving cutter 2 is provided with a cutter 10 in a closed casing 9 whose rear portion is connected to the discharge end of the air compressor 4 through an air hose 4a, and continuously takes in glass or synthetic fibers installed outside the casing 6 successively. Then, a short fiber (reinforcing fiber) is produced by cutting with a cutter 10, and the short fiber is pressure-fed to a spray nozzle 5 side through an air hose 11 from a discharge port 6a provided at a tip of a casing 9. As shown in FIG. 2, the spray nozzle 5 includes an inner tube 12 that constitutes a nozzle body connected to the air hose 11, an outer tube 14 that surrounds the outer circumference of the tip of the inner tube 12, and a nozzle opening of the inner tube 12. 12a is provided with a mixing ring 15 arranged on the outer circumference of the tip.

The outer pipe 14 is connected to the tip of the waterproof material pressure-feeding hose 6, and at the inner portion thereof, a pair of front and rear spouting holes 1 that penetrate the inner pipe 12 surrounded by the outer pipe 14 are provided.
It communicates with the inner pipe 12 through 8a and 18b. The ejection holes 18a and 18b are formed so as to obliquely intersect with each other in the ejection direction, and the waterproof material is supplied from the entire circumference of the short fibers transported in the inner pipe 12 toward the inside thereof and mixed with the short fibers. Meanwhile, it is blown out from the tip of the nozzle portion 12a.

The mixing ring 15 is an internal hollow one mounted so as to surround the outer circumference of the tip of the nozzle opening 12a by a fixing means (not shown).
Is connected to the tip of.

Inside the mixing ring 15, a plurality of ejection holes 19 are obliquely opened in the blowing direction.
This spout 19 is also shown in FIG.
The quick-setting agent that is directed in the tangential direction of the inner circumference and is pumped by this blows out toward the center side of the mixture of short fiber + waterproof material while generating a vortex when it is ejected from the ejection hole 19 It is supplied to the coated surface 20 side while mixing the quick-setting agent in the mixture by the stirring action, and the reaction for solidification immediately starts.

Therefore, in this embodiment, the spraying operation is performed by operating the pumps and the air compressor to direct the spray nozzle 5 toward the coating surface 10.

Then, immediately before the coated surface 20 during spraying, in addition to the mixture of short fibers and waterproof material, the quick-setting agent is mixed, and the fiber-reinforced waterproof material sprayed by a sufficient mixing effect is obtained. It reacts rapidly and solidifies, which prevents sagging due to vertical surface coating, for example, and shortens curing after construction.

Further, since the short fibers, the waterproof material and the quick-setting agent are in a separated state when the coating is stopped, it is possible to prevent clogging of the nozzle due to the mixing of the quick-setting agent.

FIG. 4 shows a spraying device according to a second embodiment of the method of the present invention.

In the figure, the waterproof material and the short fibers are pressure-fed to the spray nozzle 33 side through a mixture pump 31 and a pressure-feeding hose 32 in a state of being mixed and dispersed by a mixer 30 in a predetermined mixing ratio in advance. The spray nozzle 33 is similar to a general application gun, but a mixing ring 34 having the same shape as that of the first embodiment is arranged at the tip of the spray nozzle 33 and is connected to a quick-setting admixture pump 35 through a pressure-feeding hose 36. Has been done. Further, air hoses 38a, 38 having one ends connected to the air compressor 37 are provided in the middle of the respective pressure feeding hoses 32, 36.
It is connected to the other end side of b.

Therefore, in this embodiment, the mixture of short fibers + waterproofing material and the quick-setting agent are pressure-fed to the spray nozzle 33 and the mixing ring 34 at the tip in a gas-liquid mixed state, and are jetted until they reach the coating surface 20. And spray-coated on this part, and the same effect as the first embodiment is obtained.

In this embodiment, since the short fibers and the waterproof material are mixed in advance by the mixer, the nozzle can be simplified although the pumping resistance is increased.

In this embodiment, the waterproof material has been described, but it can be applied to other mortars such as cement mortar and concrete.

[0029]

As described above in detail with reference to the embodiments, in the method of spraying waterproof material of the present invention,
At the spraying tip of the mixture sprayed from the spray nozzle, the quick-setting agent is mixed by the time it reaches the coating surface, and it is sprayed on the coating surface in that state, so the mixing is complete and the operation is simple. Further, compared to the case of mixing in the nozzle, there is an advantage that the viscosity during spraying does not increase and the load accompanying this does not increase, and the trouble of maintenance after spraying can be omitted.

Further, in the spray nozzle of the present invention,
Since the mixing immediately before can be performed by the mixing ring provided at the tip of the spray nozzle, the structure is simple and the spraying operation is easy.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the overall structure of a spraying device according to a first embodiment of the method of the present invention.

FIG. 2 is a detailed view of a spray nozzle in the same device.

FIG. 3 is a sectional view taken along line AA in the nozzle.

FIG. 4 is an explanatory view showing the overall structure of a spraying device according to a second embodiment of the method of the present invention.

[Explanation of symbols]

 1 waterproof material pump 2 roving cutter 3 quick-setting agent pump 4,37 air compressor 5,33 spray nozzle 6,7,32,36 pressure feeding hose 8,9,1138a, 38b air hose 12 inner pipe 12a nozzle mouth 14 outer pipe 15 , 34 Mixing ring 18a, 18b, 19 Jet hole 20 Painted surface 30 Mixer 31 Mixture pump

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000000549 Obayashi Corporation Co., Ltd. 4-33 Kitahama Higashi, Chuo-ku, Osaka-shi, Osaka (72) Inventor Yu Sasaki 3-8-2 Nihonbashi, Nihonbashi, Chuo-ku, Tokyo 5 Floor Kuraray Co., Ltd. Tokyo Works (72) Inventor Takao Nakaya 3-8-2 Nihonbashi Building, Chuo-ku, Tokyo 5th floor Kuraray Co., Ltd. Tokyo Works (72) Inventor Shinji Matsuo 3 Nihonbashi, Chuo-ku, Tokyo -8-2 Shin-Nihonbashi Building 5F Kuraray Co., Ltd. Tokyo Office (72) Inventor Yoshiaki Takeuchi 7-6 Nihonbashi Odenmacho Chuo-ku, Tokyo Itopia Daini Odenmacho Building Shoei Pharmaceutical Co., Ltd. Tokyo Branch (72) Inventor Yamashiro Ikumin 3-18-5 Nakakasai, Edogawa-ku, Tokyo Hilark Sakae 103 J-Feck Co., Ltd. (72) Invention Miki Aoyama 4-640 Shimo-Seido, Kiyose-shi, Tokyo Inside the Obayashi Technical Research Institute, Inc. (72) Inventor Yoshimasa Hayashi 4-640, Shimo-Seido Co., Ltd., Kiyose-shi, Tokyo (72) Inventor Haruka Ogawa Tokyo 4-640 Shimoseido, Kiyose-shi, Tokyo Obayashi Technical Research Institute Co., Ltd. (72) Inventor Kiyoshige Nishibayashi 4-640 Shimo-Seido, Kiyose City Tokyo Metropolitan Institute of Technology Obayashi Corporation

Claims (5)

[Claims] 1. A method of spraying a waterproof material or the like, wherein a quick-setting agent is sprayed simultaneously with the waterproof material from a plurality of spray holes arranged at equal intervals around the tip of the spray nozzle. 2. A reinforcing fiber, a waterproof material, and a quick-setting agent are separately fed under pressure, and the reinforcing fiber and the waterproof material are mixed in a spray nozzle,
Next, a method for spraying a waterproof material or the like, characterized in that the quick-setting agent is mixed in a crossed state at the jetting tip of the mixture jetted from the nozzle port and sprayed on the coated surface in a state of reacting. 3. A mixture of the reinforcing fiber mixed and dispersed in a waterproof material in advance, the mixture being pressure-fed into a spraying nozzle, and the quick-setting agent being pressure-fed through another route being jetted from the nozzle opening. A method for spraying waterproof material, characterized by mixing and reacting in a crossed state at the ejection tip. 4. A mixing ring, which is arranged on the outer periphery of the tip of a nozzle that jets a waterproof material containing or not containing reinforcing fibers, and jets a quick-setting agent in a vortex flow inside the nozzle mouth of the nozzle in the jet direction. Nozzle for spraying waterproof material, etc. 5. The spray nozzle surrounds an inner pipe for jetting reinforcing fibers and the outer periphery of the inner pipe, and intersects the jetting direction of the reinforcing fibers of the inner pipe diagonally with a waterproof material. 5. A spray nozzle for a waterproof material or the like according to claim 4, further comprising: an outer pipe for jetting, wherein the mixing ring is provided on an outer periphery of a tip of the nozzle opening.