JP2988649B2 - Spraying method and spray nozzle for waterproof material etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, in spraying a waterproof coating layer made of, for example, urethane rubber, acrylic rubber, rubber asphalt, etc., the resistance to zero spanning of the waterproof coating has been increased. For the purpose of preventing sagging and the like, a method of interposing a reinforcing fiber has been adopted. As one of the methods, spraying and applying to a construction site is performed while mixing reinforcing fibers in a 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 a waterproof layer having a large tensile product can be formed without directionality.

[0003] As a specific spraying method, for example, Japanese Patent Application Laid-Open No. 1-218666 discloses that a mixture of asphalt and fiber is sprayed from the tip of a spray nozzle toward a coating surface, and a nozzle arranged in parallel with the nozzle is used. By spraying the coagulating liquid (setting agent) on the same painted surface,
Accelerates the curing of sprayed fiber reinforced waterproofing material.

In Japanese Patent Publication No. Sho 62-60557, a base material (shot concrete) and a quick-setting agent are sprayed onto a tunnel wall surface through a nozzle in a state of being mixed in a pipeline.

However, in either method,
There are 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 nozzles having an equal relationship by a multi-head nozzle, the quick-setting agent is biased with respect to the mixture. Mixing causes unevenness. There is also a disadvantage that skill is required for nozzle operation.

In the latter case, consolidation occurs before the nozzle passes, the viscosity increases, the nozzle becomes clogged, the load on the pressure pump increases, and maintenance such as cleaning of the nozzle after use is frequently performed. There was a drawback that had to be done.

Accordingly, an object of the present invention is to provide a method of spraying a waterproof material or the like and a spray nozzle which can sufficiently mix a waterproofing material and a quick-setting agent, do not cause nozzle clogging, and are easy to maintain. And

[0009]

In order to achieve the above object, the invention according to claim 1 comprises a reinforcing fiber, a waterproof material, and a quick-setting agent.
Nozzle and spray the reinforcing fiber and waterproof material separately
In the mixture, and then the mixture ejected from the nozzle port.
A state in which the quick-setting agent is mixed and reacted in a crossing state at the jetting tip.
It is characterized in that it is sprayed on the painted surface in a state. Claim 2
According to the invention, the reinforcing fibers are mixed and dispersed in a waterproof material in advance.
At the same time, the mixture is pumped into the spray nozzle,
Is discharged from the nozzle port.
Mixing and reacting at the tip of the mixture
And features.

[0010] According to the third aspect of the present invention, a reinforcing fiber is mixed.
Outside the tip of the nozzle that blows out the waterproof material
Around the nozzle, in the ejection direction inside the nozzle opening of the nozzle
A mixing ring that spouts the quick-setting agent
And features. The invention according to claim 4 is characterized in that the nozzle
Is an inner tube for ejecting reinforcing fibers and an outer periphery of the inner tube.
Along with surrounding, the oblique direction of the reinforcing fibers
An outer tube that intersects and blows out a waterproof material.
Characterized in that the mixing ring is provided on the outer periphery of
I do.

[0011]

According to the first aspect of the present invention, the reinforcing fiber and the waterproofing are provided.
Material and quick-setting agent are separately pumped and sprayed with reinforcing fiber and waterproof material
Mixing in the nozzle, then mixing ejected from the nozzle port
A state in which the quick-setting binder is mixed and reacted at the tip of the material
Spraying on the painted surface in a state
It is possible to suppress an increase in viscosity in the inside . Invention of claim 2
According to the above, the quick-setting agent pumped through another path is nozzle
Mixing at the tip of the spout of the mixture spouted from the mouth,
Mixing in the nozzle because it is made to react
Can suppress the increase in viscosity compared to the
Mixing can be promoted.

According to the third aspect of the present invention, the inside of the nozzle
Mixing agent that ejects the quick-setting agent in a vortex toward the ejection direction
With a quick-setting agent at the tip of the nozzle.
Is efficiently mixed with a waterproof material or the like. Also,
Viscosity during spraying compared to mixing inside
There is no increase in the load and the load associated therewith. Claim 4
According to the invention, the inner pipe for ejecting the reinforcing fibers and the inner pipe
Surrounds the outer circumference of the inner tube of
With an outer tube that crosses diagonally to squirt waterproof material
At the tip of the nozzle orifice.
A quick-setting agent is provided at the tip of the nozzle due to the
To be efficiently mixed with the reinforcing fibers and waterproofing material.
You.

[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 an apparatus used in the method of the present invention, FIG. 2 shows details of a spray nozzle, and FIG. The details of the mixing ring are respectively shown.

In FIG. 1, the spraying device includes a waterproofing 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 thereto. 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 thereto. When the waterproofing material is rubber asphalt, an aqueous solution of calcium chloride is selected as a quick setting agent. Air hoses 8, 9 having one end connected to the air compressor 4 are connected to the pressure feeding hoses 6, 7 of the pumps 1, 3, respectively.
It is fed to the spray nozzle 5 side in a mixed state of air and gas-liquid.

The roving cutter 2 is provided with a cutter 10 in a closed casing 9 having a rear portion connected to the discharge end of the air compressor 4 through an air hose 4a. The short fibers (reinforcement fibers) are cut by a cutter 10 and the short fibers are fed to the spray nozzle 5 side through an air hose 11 from a discharge port 6 a provided at the end of a casing 9. As shown in FIG. 2, the spray nozzle 5 includes an inner pipe 12 that forms a nozzle body connected to the air hose 11, an outer pipe 14 that surrounds the outer periphery of the tip of the inner pipe 12, and a nozzle port of the inner pipe 12. This is provided with a mixing ring 15 arranged on the outer periphery of the tip of 12a.

The outer pipe 14 is connected to the distal end of the waterproof material pressure-feeding hose 6 and has a pair of front and rear multiple ejection holes 1 penetrating the inner pipe 12 surrounded by the inner pipe 12 at an inner portion thereof.
It communicates with the inner pipe 12 through 8a and 18b. The ejection holes 18a and 18b are formed obliquely crossing in the ejection direction, and supply a waterproof material from the entire circumference of the short fiber transported in the inner tube 12 to the inside thereof, and mix with the short fiber. While blowing out from the tip of the nozzle part 12a.

The mixing ring 15 is hollow inside and is attached by a fixing means (not shown) so as to surround the outer periphery of the tip of the nozzle port 12a.
It is connected to the tip of.

A plurality of ejection holes 19 are obliquely opened inside the mixing ring 15 in the ejection direction.
This outlet 19 is also provided with a mixing ring 15 as shown in FIG.
The quick-setting agent pumped by this is blown out toward the center of the blowout of the mixture of short fibers and the waterproof material while generating a vortex at the time of being blown out from the blowout hole 19, The mixture is supplied to the coating surface 20 while mixing the quick-setting agent by the stirring action, and the reaction for solidification starts immediately.

Therefore, in this embodiment, when each of the pumps and the air compressor is operated and the spray nozzle 5 is directed to the painted surface 10, the spray operation is performed.

Then, in addition to the short fiber + waterproofing material mixture and the quick setting agent immediately before the painted surface 20 at the time of spraying, the fiber-reinforced waterproofing material sprayed with a sufficient mixing effect is used. It rapidly reacts and solidifies, thereby preventing dripping due to, for example, vertical surface application, and shortening curing after construction.

In the state where the coating is stopped, the short fibers, the waterproof material and the quick-setting binder are separated from each other, so that clogging of the nozzle due to mixing of the quick-setting binder is prevented.

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

In the figure, the waterproof material and the short fibers are mixed and dispersed at a predetermined mixing ratio by a mixer 30 in advance, and are pressure-fed to a spray nozzle 33 through a mixture pump 31 and a pressure hose 32. The spray nozzle 33 is the same as a general coating gun, but a mixing ring 34 having the same shape as that of the first embodiment is disposed at the tip thereof, and is connected to a quick-setting agent pump 35 through a pressure feeding hose 36. Have been. One end of each of the pressure feeding hoses 32, 36 is connected to an air hose 38a, 38 having one end connected to an air compressor 37.
b is connected to the other end.

Therefore, in this embodiment, the mixture of short fiber + waterproofing material and the quick-setting agent are fed in a gas-liquid mixed state to the spray nozzle 33 and the mixing ring 34 at the tip, and are ejected until they reach the coating surface 20. And spray-applied to this portion to obtain the same effect as in the first embodiment.

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 pressure resistance is increased.

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

[0029]

As described in detail above, claims 1 and 2
According to the inventions described in paragraphs 2 and 2, the waterproof material and the like reach the painted surface.
The quick-setting agent can be completely mixed at
Simple and spraying compared to mixing in the nozzle
Increase in the viscosity during
And maintenance after use can be simplified.
Wear.

According to the third and fourth aspects of the present invention, a quick connection
Mixing agent with reinforcing fiber and waterproofing material by mixing ring
Just before mixing, so that during spraying
No increase in viscosity and the accompanying load
The structure of the chile is simplified.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the entire configuration 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 apparatus.

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

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

[Explanation of symbols]

 DESCRIPTION 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 Pressurization hose 8,9,1138a, 38b Air hose 12 Inner tube 12a Nozzle port 14 Outer tube 15 , 34 Mixing ring 18a, 18b, 19 Vent hole 20 Painted surface 30 Mixer 31 Mixture pump

Continuation of the front page (72) Inventor Joe Sasaki 3-8-2 Nihonbashi, Chuo-ku, Tokyo 5th floor of Shin Nihonbashi Building Kuraray Co., Ltd. Tokyo Office (72) Inventor Takao Nakaya 3-8-2 Nihonbashi, Chuo-ku, Tokyo Shin Nihonbashi Building 5F Kuraray Co., Ltd. Tokyo Office (72) Inventor Shinji Matsuo 3-8-2 Nihonbashi, Chuo-ku, Tokyo Shinnihonbashi Building 5F Kuraray Co., Ltd. Tokyo Office (72) Inventor Yoshiaki Takeuchi Tokyo 7-6 Nihonbashi Odenmacho, Chuo-ku, Tokyo Itopia Daini Odenmacho Building Shoei Pharmaceutical Co., Ltd. Tokyo Branch (72) Inventor Ikumin 3-18-5 Nakakasai, Edogawa-ku, Tokyo (72) Inventor Miki Aoyama 4-640 Shimoseito, Kiyose-shi, Tokyo, Japan Inside Obayashi-gumi Technical Research Institute (72) Inventor Yoshimasa Hayashi 4-640 Shimoseito, Kiyose-shi, Tokyo, Ltd. In the laboratory (72) Inventor Haruka Ogawa Tokyo 4-640 Shimoseito, Kiyose-shi, Obayashi-gumi Technical Research Institute, Inc. (72) Inventor Kiyoshige Nishibayashi 4-640 Shimoseito, Kiyose-shi, Tokyo, Japan, in Obayashi-Gumi Technical Research Institute (56) JP-A-4-182569 (JP, A) JP-A-3-235875 (JP, A) JP-B 7-103691 (JP, B2) JP-B 63-15493 (JP, Y2) JP-B 2-33886 (JP, Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) E04G 21/02 103 B05B 7/06 B05D 7/24 303

Claims (4)

(57) [Claims] 1. A reinforcing fiber, a waterproof material and a quick-setting agent are separately pumped, and the reinforcing fiber and the waterproof material are mixed in a spray nozzle.
A spraying method of a waterproof material or the like, wherein the quick-setting agent is mixed and reacted in a crossed state at a jetting tip of the mixture spouted from the nozzle port, and sprayed onto a painted surface. 2. A method in which the reinforcing fibers are previously mixed and dispersed in a waterproof material, and the mixture is pressure-fed into a spray nozzle, and the quick-setting agent, which is pressure-fed via another path, is mixed with the mixture ejected from the nozzle port. A method of spraying a waterproof material or the like, characterized by mixing and reacting in a crossed state at a jetting tip. 3. A mixing ring which is arranged on the outer periphery of the tip end of a nozzle for ejecting a waterproof material into which a reinforcing fiber is mixed or not, and which jets a quick-setting agent in a vortex shape toward the inside of a nozzle opening of the nozzle in a jet direction. A spray nozzle made of a waterproof material or the like, characterized in that a spray nozzle is provided. 4. The nozzle surrounds an inner tube for ejecting reinforcing fibers and an outer periphery of the inner tube, and ejects a waterproof material obliquely intersecting the ejection direction of the reinforcing fibers of the inner tube. and an outer tube, spray nozzle of waterproof material, such as according to claim 1, characterized by providing the mixing ring on the outer periphery of the nozzle orifice tip.