JP2001321701A - Spray gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray gun which can efficiently mix a plurality of liquid agents. SOLUTION: In the spray gun which mixes the pumped plural liquid agents and sprays the mixture to an object to be sprayed with a nozzle turned toward the object, an agitation part in which an agitator 52 having agitation blades and a spiral body 57 forming a spiral passage are combined is formed in the nozzle 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray gun for mixing a plurality of liquids fed under pressure and spraying the mixed liquid toward a target to be sprayed.

[0002]

2. Description of the Related Art Waterproofing on a building roof or the like includes:
For example, there is urethane waterproofing shown in FIG. In FIG. 14, reference numeral 1 denotes a waterproof base such as a concrete slab, and reference numeral 2 denotes a multilayer urethane waterproof layer provided on the waterproof base 1. The urethane waterproof layer 2 includes an upper layer 3 and a lower layer 4, and the lower layer 4 is disposed in close contact with the waterproof base 1. The lower layer 4 has a JIS hardness of A50 and a tensile strength of 50 kg /.
cm ^2, made from a relatively soft urethane elastomer elongation about 700%, the upper layer 3, JIS hardness A90, tensile strength 100 kg / cm ^2, is made of a semi-rigid urethane elastomer elongation about 400%. In the multilayer urethane waterproofing layer 2, since the lower layer 4 is soft and has good elongation, even when a crack or the like occurs in the underlayer 1, the underlayer 4 extends following the crack and the upper layer 3 does not break. It has become.

However, this multi-layer urethane waterproof layer 2
In the case where the waterproof base 1 has irregularities, irregularities, steps, etc., the lower layer 4 can provide a certain degree of base adjustment (substrate treatment) function, but if the irregularities become severe,
Since it is difficult to form the lower layer 4 as a continuous film, it is necessary to correct the underlayer 1 to be flat or to newly provide a cushioning material (not shown) between the underlayer 1 and the lower layer 4. However, there is a problem that extra construction cost is required.

As a waterproofing method for avoiding such a problem caused by the unevenness of the waterproof base 1, a method of forming a waterproof layer using a foam layer formed by a chemical reaction between chemical solutions can be considered. . In this case, for example, the waterproof construction device shown in FIG. 15 can be used. The waterproofing apparatus 5 includes liquid agent tanks 8 and 9 for storing liquid agents 6 and 7 (for example, isocyanate and hardener polyol, and a foaming agent is also mixed in advance), which are hardened by mixing. 9, liquid pumps 10 and 11 for pumping the respective liquids,
A spray gun 13 for receiving and mixing the mixture, and spraying the spray gun toward a spray target 12 such as a floor surface, and a tube 14 and a valve 15 arranged between the spray gun 13 and the liquid agent tanks 8 and 9. I have.

[0005] The spray gun 13, which receives the liquids 6 and 7, which are pumped by the supply pressures of the liquid agent pumps 10 and 11 from the respective liquid agent tanks 8 and 9, is operated toward the object 12 to be sprayed. Inside liquid 8,9
Are mixed to form a mixed solution 16, which is sprayed toward the spray target 12. Then, the injected mixed solution 16
Forms a urethane foam layer having a flat construction surface by chemically foaming with the foaming agent mixed therein and filling the unevenness of the spray target 12. And after obtaining this urethane foam layer, waterproofing is completed by further applying a liquid waterproofing layer thereon.

[0006]

The spray gun 13 of the waterproof construction device 5 described above has the following problems. That is, the spray gun 13
It is necessary to mix the liquids 8 and 9 well before spraying them onto the object 12 to be sprayed. However, the barrel of the spray gun 13 cannot be made too long in handling. In this case, the respective liquid preparations must be efficiently mixed with each other, which may be difficult. Apart from this, the spray gun 13 has a structure in which the liquid agents 8 and 9 mixed with the foaming agent are used in order to foam the mixed liquid agent 16.
There was also an environmental problem that the odor was generated around the construction site.

The present invention has been made in view of the above circumstances, and has as its object to provide a spray gun capable of efficiently mixing a plurality of liquid medicines. It is another object of the present invention to form a foamed layer by foaming not by a chemical reaction of a liquid agent but by blowing an inert gas.

[0008]

Means for Solving the Problems The spray gun of the present invention employs the following means to solve the above problems.
That is, the spray gun according to claim 1 is a spray gun that mixes a plurality of liquid materials fed under pressure and sprays the nozzle toward a spray target, wherein the nozzle has a stirring body having a plurality of stirring blades. And a stirrer that combines a spiral body forming a spiral flow path. According to the spray gun of the first aspect, each liquid agent before being ejected from the nozzle to the outside is sufficiently fed into the nozzle after passing through the nozzle and passing through the stirring blade of the stirring member and the spiral flow path of the spiral body. Stir and mix with each other.

The spray gun according to the second aspect is the first aspect of the invention.
In the spray gun according to the aspect, the nozzle further includes an inert gas supply unit that supplies an inert gas to the mixture of the respective liquid agents, and the inert gas to the mixture liquid that has passed through the inert gas supply unit. An inert gas mixing section that mixes as air bubbles, and a nozzle tip portion having an opening for injecting the mixed solution that has passed through the inert gas mixing section toward the spray target is provided. I do. According to the spray gun of the second aspect, by mixing the inert gas into the mixed liquid as bubbles in the inert gas mixing section, the mixed liquid can be physically foamed without using a chemical reaction of the liquid. it can. In addition, the mixing of the inert gas further promotes the stirring of the respective liquids, so that even if the respective liquids are pumped at a relatively low pressure, the respective liquids can be mixed efficiently.

A third aspect of the present invention is a spray gun.
In the above-described spray gun, the nozzle is provided with a liquid agent mixing unit that mixes each of the liquid agents fed under pressure, and the stirring unit is provided in the liquid agent mixing unit. According to the spray gun of the third aspect, each liquid agent before reaching the inert gas mixing section can be sufficiently stirred and mixed by the stirrer of the liquid agent mixing section.

[0011] The spray gun according to the fourth aspect is the first aspect of the invention.
The spray gun according to any one of the above-mentioned items, wherein the stirring body is detachable from the inside of the nozzle. According to the spray gun of the fourth aspect, since the stirring body can be removed as needed, cleaning of the inside of the nozzle and cleaning of the stirring body after using the spray gun can be easily performed. Further, in some cases, the stirring body can be replaced.

According to a fifth aspect of the present invention, there is provided a spray gun.
5. The spray gun according to any one of items 4 to 4, wherein the nozzle is provided with a valve capable of adjusting a supply amount of the inert gas to the mixture.
According to the spray gun of the fifth aspect, the supply amount of the inert gas into the nozzle can be adjusted by operating the valve.

[0013] The spray gun according to the sixth aspect is the first aspect.
In the spray gun according to any one of the first to fifth aspects, the spiral body is detachable from the nozzle. According to the spray gun according to the sixth aspect, the spiral body can be removed as needed, so that cleaning of the inside of the nozzle and cleaning of the spiral body after using the spray gun can be easily performed. In some cases, the spiral can be replaced.

[0014] The spray gun according to the seventh aspect is the first aspect.
7. The spray gun according to any one of the above-described items, wherein a guide airflow injection unit that injects an airflow that flows so as to cover the periphery of the mixed liquid agent injected from the nozzle is provided. According to the spray gun according to the seventh aspect, the mixed solution sprayed from the spray port of the nozzle toward the object to be sprayed is guided by an airflow flowing so as to cover the periphery thereof, so that a so-called tail phenomenon (from the nozzle). When the injected liquid mixture comes into contact with the inner surface of the fluid space formed by itself, the flow becomes non-uniform, and the phenomenon of resin separation at the spray target can be prevented. Further, by covering the periphery of the mixed solution with an airflow, it is possible to prevent the mixed solution from scattering from the airflow toward the outside. Further, since the scattering can be prevented, the application efficiency of the mixed solution is improved.

[0015] The spray gun according to claim 8 is a spray gun according to claim 7.
In the above-described spray gun, the guide airflow injection means includes a guide airflow injection hole that is opened around the injection port of the nozzle and serves as an airflow outlet. According to the spray gun of the eighth aspect, by adjusting the number and the diameter of the guide airflow injection holes, the flow rate of the airflow can be appropriately adjusted according to the flow rate of the mixed liquid agent. In addition, by appropriately adjusting the direction of each guide airflow injection hole, it is possible to form an airflow that covers and surrounds the mixed solution while spirally surrounding the mixed solution.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First and second embodiments of a waterproof construction apparatus having a spray gun according to the present invention will be described below with reference to the drawings. However, it is needless to say that the present invention is not limited to these. First, the first embodiment will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram showing a first embodiment of a waterproof construction apparatus provided with a spray gun according to the present invention. 2 is a side view showing the spray gun, FIG. 3 is a view of the spray gun viewed from the line BB in FIG. 2, and FIG. 4 is a view of a nozzle of the spray gun. FIG. 5 is a perspective exploded view showing a nozzle of the spray gun, and FIG.
It is sectional drawing which shows the nozzle of the same spray gun. FIG. 7 is a perspective view showing a stirring body in the nozzle of the spray gun, and FIG. 8 is a perspective view showing a spiral body in the nozzle of the spray gun.

As shown in FIG. 1, the waterproofing device 20 according to the present embodiment comprises two types of liquid materials 2 which cure when mixed.
The liquid tanks 23 and 24 storing the isocyanates 1 and 22, respectively (for example, one is an isocyanate and the other is a curing agent polyol or the like; no foaming agent is mixed), and the two types of liquids 21 and 22 are pressure-fed. Liquid pump 2
And a spray gun 28 for receiving and mixing these liquid materials 21 and 22 and spraying them toward a spraying target 27 such as a floor surface, and piping between the spray gun 28 and the two liquid material tanks 23 and 24. Tubes 29 and 30,
Valve 3 provided in the path of tubes 29 and 30
1, 32 and an inert gas 3 to be supplied to the spray gun 28
3 (for example, air or carbon dioxide gas)
4 and a tube 35 provided between the valve 34 a of the gas cylinder 34 and the spray gun 28.

The spray gun 28 shown in FIGS. 2 and 3 comprises a plurality of liquid medicines 2 fed from the liquid medicine tanks 23 and 24 under pressure.
A device that mixes the components 1 and 22 inside and sprays them toward the spraying target 27, and is attached to a tip of the gripping portion 36, which is a portion that is gripped and operated by an operator handling the device. And the nozzles 37 provided. The grip 36 is a grip 38 that is gripped by hand.
And the tube 2 of each of two types of liquids 21 and 22
Two tube connecting portions 39 and 40 to which the connecting portions 9 and 30 are connected.
A converging section 41 in which a converging flow path 41a for converging the liquid agents 21 and 22 introduced from the tube connecting sections 39 and 40 and leading the liquid agent 21 and 22 to the nozzle 37;
a, which can shut off each of the liquid materials 21 and 22 toward
43 (not shown in FIG. 3) and these valves 42, 43
And a cleaning pipe 36A to which a cleaning liquid supply pipe (not shown) for supplying a cleaning liquid CL to be fed into the nozzle 37 via the merging flow path 41a is connected.
And a valve 36B for adjusting the supply amount of the cleaning liquid CL.

According to the holding portion 36, the operator holds the holding portion with one hand and sets the nozzle 37 to the spray target 27.
Then, by gripping the lever 44 so as to approach the grip portion 38, the valves 42 and 43 are opened, and the liquid agents 21 and 22 pressure-fed from the tubes 29 and 30 are merged via the merge flow channel 41a. While being supplied to the nozzle 37. Conversely, the operator moves the lever 44 to the grip 38
By separating them from each other, the joining flow path 41a is closed by the valves 42 and 43, and the supply of the liquid agents 21 and 22 toward the nozzle 37 is shut off.

A nozzle 37 shown in FIGS. 4 to 6 is provided with a liquid mixing section 45 for mixing the liquids 21 and 22 fed from the gripping section 36 and a liquid mixing section 45 mixed in the liquid mixing section 45. , An inert gas supply unit 48 for supplying an inert gas 33 to the mixed solution 46, and the inert gas supply unit 4.
An inert gas mixing section 49 for mixing the inert gas 33 as air bubbles with the mixed solution 46 having passed through the inert gas mixing section 4;
And a nozzle tip 51 having an injection port 51a for injecting the mixed solution 50 having passed through the nozzle 9 toward the spray target 27.

As shown in FIG. 5, the liquid material mixing section 45
Is a stirring body 52 having a plurality of stirring blades 52a and 52b.
A liquid mixing section main body 53 containing the stirring member 52, and a connecting body 5 connecting the liquid mixing main body 53 to the grip 36.
4 is provided. The stirrer 52, as shown in FIG.
A rod-shaped shaft 52c, a plurality of agitating blades 52a provided on one side separated by a virtual plane passing through the axis of the shaft 52c and inclined with respect to the axis, and the other of the virtual plane On the side, a plurality of stirring blades 52b are provided so as to be inclined so as to intersect with each of the stirring blades 52a. The shaft 52c and the stirring blades 52a and 52b are integrally formed by injection molding. It is a resin molded product.

Each of the stirring blades 52a is a substantially semi-elliptical plate arranged in parallel at equal intervals from each other, and a space between these stirring blades 52a is formed as a flow path through which the liquid agents 21 and 22 flow. ing. On the other hand, each stirring blade 52b is configured by alternately arranging two types of stirring blades 52b (substantially semi-elliptical plate bodies) having different inclination angles.
The space between b is formed as a flow path through which the liquid materials 21 and 22 flow. And these stirring blades 52a, 52b
Has a substantially circular outer shape when viewed from the line of sight passing through the axis of the shaft body 52c.

As shown in FIG. 6, the stirrer 52 having the above-described structure is coaxially incorporated in a mixing section passage 53a formed in the liquid mixing section main body 53. The agitator 52 is only inserted into the mixing section flow path 53a, and is detachable from the liquid mixing section main body 53. The liquid mixing section main body 53 shown in the figure is a component having a substantially cylindrical shape, and external threads 53b and 53c are formed on outer peripheral portions on both axial sides.

As shown in FIG. 5, the connecting member 54 has a female screw 54a which is screwed to the male screw 53c of the liquid agent mixing portion main body 53.
And a female screw 54 screwed into the joining portion 41 of the grip portion 36
b is a part formed, and has a role of interposing between the liquid agent mixing unit main body 53 and the merging unit 41 to connect them. If necessary, the connecting body 54 and the junction 4
Preferably, an O-ring made of, for example, a resin is sandwiched between the first and the second to prevent liquid leakage (not shown).

As shown in FIG. 5, the inert gas supply section 48 is connected to the tube 35 and is connected to the inert gas 33.
Connector 48a serving as an introduction port for the inert gas mixing section 4
9, a male screw 48b for vertically connecting the inert gas supply section 48, a gas supply port 48c for sending out the inert gas 33 into the inert gas mixing section 49, and an inert gas supply port 48c. The mixed liquid 4 in the active gas mixing section 49
48d capable of shutting off the supply of the inert gas 33 to the valve 6
And The valve 48d is rotatable in the direction of the arrow A in the figure, and can be selected from fully closed or fully open as the valve opening degree depending on the degree of rotation. Further, the valve 48d is provided between the fully closed state and the fully opened state.
By adjusting the rotation angle of the inert gas, the gas flow rate of the inert gas 33 entering the inert gas mixing section 49 can be appropriately adjusted at hand.

As shown in FIGS. 5 and 6, the inert gas mixing section 49 has an internal thread 55a to which the external thread 53b of the liquid agent mixing section 53 is screwed. A gas mixing section main body 55 and the inert gas mixing section main body 5
A stirrer stopper 56 for pressing down and preventing the stirrer 52 from moving inward, a spiral body 57 for forming a spiral flow path in the inert gas mixing unit main body 55, and a spiral tip 57 for the nozzle tip. A spiral stopper 58 for holding down and preventing the movement toward 51;
And a set screw 59 for adjusting the flow rate.

As shown in FIG. 6, the inert gas mixing section main body 55 is a stainless steel part having a substantially cylindrical shape with a part in the axial direction having a larger diameter than the other parts. A through hole 5 into which the agitator stopper 56 is inserted and fixed is provided at the rear end side of the inert gas mixing unit main body 55.
5b is formed continuously with the female screw 55a.
A female screw 55c with which the male screw 51b of the nozzle tip 51 is screwed is provided on the tip side of the inert gas mixing section main body 55.
In addition, a gas mixing flow passage 55d in which the spiral body 57 is inserted and fixed to allow the mixture liquid 46 and the inert gas 33 to flow, and a female screw 55e to which the spiral body stopper 58 is screwed are formed. In the middle of the flow path from the stirring body 52 to the spiral body 57, a female screw 55f orthogonal to the female screw 55f is formed, and the set screw 59 is screwed here. As shown in FIG. 6, the agitator stopper 56 has a flow path 56a therein.
Are formed coaxially, and the mixed liquid agent 46 from the mixing section flow path 53a can flow toward the gas mixing flow path 55d.

As shown in FIG. 8, the spiral body 57 bundles a large number of fine copper wires 57c between two wires 57a and 57b, sandwiches the bundle, and spirally winds the wires 57a and 57b in this state. 57c is formed in a continuous spiral shape, and a spiral flow path 57f through which the mixed solution 46 and the inert gas 33 flow is formed between spiral wall surfaces formed by the wire 57c. The wire 57c formed in a spiral shape in this way has a substantially circular outer shape when viewed from a line passing through its axis. FIG.
As shown in (1), the spiral body 57 having the above configuration is coaxially built in the gas mixing flow path 55d of the inert gas mixing section main body 55. The spiral body 57 constitutes a stirring unit by being combined with the stirring body 52. Note that this spiral body 57 is only inserted into the gas mixing flow path 55d, and is detachable from the inert gas mixing section main body 55.

The spiral stopper 58 has a gas mixing channel 5
A flow path 58a (see FIG. 6) through which the mixed solution 50 having passed through 5d can flow toward the nozzle tip 51, and a hexagon hole 58b (see FIG. 5) into which a hexagon wrench (not shown) is fitted are formed. Internal thread 55 of the inert gas mixing unit main body 55
e, it is screwed coaxially. As shown in FIG. 6, the liquid screw mixing section main body 53 is
Male screw 59a screwed into female screw 55f of
f, a bottom surface 59b for closing the upper side of the drawing sheet and a hexagon hole 59c into which a hexagon wrench (not shown) is fitted. The bottom surface 59b can be moved in the vertical direction depending on the screwing depth. I have. The nozzle tip 51
As shown in FIG. 6, is a component that is screwed to the tip side of the inert gas mixing section main body 55, takes in the mixed liquid agent 50 from the inert gas mixing section 49, and widens the injection port 51a from its injection port 51a. Injection is possible.

With the above-described configuration, the nozzle 37 starts from the mixing section flow path 53a and starts from the flow path 5a.
The flow path 6a, the gas mixing flow path 55d, the flow path 58a, and the flow path continuous to the injection port 51a are formed on the same axis. Therefore, the respective liquid medicines 21 and 22 pressure-fed from the merging flow path 41a of the grip portion 36 are stirred by the stirring body 52 when passing through the mixing section flow path 53a (the stirring body 52 itself is stationary, This does not mean that the liquids 21 and 22 are mixed by rotation.
As a result, each of the liquid materials 21 and 22 flows as if being stirred. ) And mixed with each other to form a mixed solution 46. After passing through the flow path 56 a in the agitator stopper 56, the mixed liquid 46 flows into the inert gas mixing unit main body 55 together with the inert gas 33 introduced into the female screw 55 f from the inert gas supply unit 48. Flows into the gas mixing channel 55d.

A part of the female screw 55f located while the mixed solution 46 is transferred from the flow path 56a to the gas mixing flow path 55d is a flow path substantially interposed therebetween.
Moreover, by adjusting the screwing depth of the set screw 59, the cross-sectional area of the flow path between the flow path 56a and the gas mixing flow path 55d is adjusted to increase or decrease the flow rate of the mixed liquid agent 50 to be injected. It is possible. That is, the mixed solution 5
When it is desired to reduce the flow rate of 0, the set screw 59 is screwed deeply with the hexagonal wrench to narrow down the flow path between the flow path 56a and the gas mixing flow path 55d.
When it is desired to increase the flow rate of 0, the set screw 59 is screwed shallowly with the hexagonal wrench to increase the cross-sectional area of the flow path between the flow path 56a and the gas mixing flow path 55d.

The inert gas supply section 48 and the inert gas 33 flowing into the gas mixing flow path 55d are mixed well with each other while spirally flowing by the spiral body 57 to form a mixed liquid 50. The mixed liquid 50 contains an inert gas 33.
Are mixed as air bubbles, and serve to foam the mixed solution 50. Then, after passing through the gas mixing flow path 55d, the mixed liquid agent 50 is injected from the injection port 51a of the nozzle tip 51 to the outside at a wide angle after passing through the flow path 58a. The mixed liquid 50 sprayed in this way forms the foam layer while being cured in the spray target 27.

It should be noted that the merging flow path 41a of the grip 36, the flow paths in the nozzle 37, the agitator 52 and the spiral body 57,
Cleaning of the injection port 51a and the like of the nozzle tip 51 is periodically performed according to the following procedure. That is, first, lever 4
4 is released to stop the supply of both liquid agents 21 and 22, and the valve 48d is closed to stop the supply of the inert gas 33. Thereafter, the closed valve 36B is opened to start supplying the cleaning liquid CL. Then, this cleaning liquid CL
Is washed out of the liquids 21 and 22 attached thereto, and is discharged to the outside through the injection port 51a together with the attached substances. After sufficient cleaning with the cleaning liquid CL is performed in this manner, the valve 36B is closed, and then the valve 48d is opened again, and the inert gas 33 is introduced into the nozzle 37.
Flow. Then, the inert gas 33 blows off the cleaning liquid CL remaining in the nozzle 37, and the cleaning operation is completed.

The waterproof construction apparatus 2 of the present embodiment described above
According to the spray gun 28 provided at 0, the following effects can be obtained. That is, the spray gun 28 according to the present embodiment is configured such that the nozzle 37 has a stirring body 52 having a plurality of stirring blades 52a and 52b and a spiral flow path 57f.
The structure provided with the stirring part which combined the spiral body 57 which forms this is employ | adopted. According to this configuration, the nozzle 3
The liquids 21 and 22 before being ejected to the outside from the nozzle 7 are pressure-fed into the nozzle 37, and then the stirring blades 52a,
Since the liquids 21 and 22 are sufficiently stirred when passing through the spiral flow path 57f of the spiral body 57 and 52b, the liquid agents 21 and 22 can be efficiently mixed with each other.

Further, the spray gun 28 of the present embodiment
The nozzle 37 includes an inert gas supply unit 48 that supplies the mixed solution 46 with the inert gas 33, and the inert gas supply unit 4.
An inert gas mixing section 49 for mixing the inert gas 33 as air bubbles with the mixed solution 46 having passed through the inert gas mixing section 4;
9 is provided with a nozzle tip 51 having an injection port 51a for injecting the mixed solution 50 that has passed through 9 toward the spray target 27, and a spiral body 57 that forms a spiral flow path is provided in the inert gas mixing section 49. The configuration was adopted. According to this configuration, by mixing the inert gas 33 in the inert gas mixing section 49 as air bubbles into the mixed liquid agent 46, the mixed liquid agent 46 can be foamed, so that the physical reaction can be performed without using a chemical reaction of the liquid agent. It is possible to form a foamed layer in an efficient manner. Also, by mixing the inert gas 33, each liquid 2
Since the agitation between the liquid materials 21 and 22 is further promoted, even if the liquid materials 21 and 22 are pressure-fed at a relatively low pressure, the liquid materials 2 and 22 can be efficiently supplied.
1, 22 can be mixed.

The spray gun 28 according to the present embodiment
Adopts a configuration in which a nozzle 37 is provided with a liquid agent mixing section 45 for mixing the pressure-fed liquids 21 and 22, and the liquid agent mixing section 45 is provided with a stirrer 52 having a plurality of stirring blades 52a and 52b. did. According to this configuration, each of the liquid materials 21 and 22 before reaching the inert gas mixing unit 49 can be stirred by the stirrer 52 of the liquid material mixing unit 45, so that mixing of the liquid materials 21 and 22 causes uneven mixing. And can be mixed well.

Further, according to the spray gun 28 of the present embodiment, the stirrer 52 can be detached from the liquid agent mixing section 45 if necessary by removing it from the liquid mixing section 45. Cleaning of the inside of the nozzle 37 after use of the nozzle 28 and cleaning of the stirring body 52 can be easily performed. Further, in some cases, the stirring body 52 can be replaced, so that the stirring body 52 can be handled as a consumable item.

Further, according to the spray gun 28 of the present embodiment, the inert gas 3
By adopting a configuration provided with a valve 48d capable of adjusting the supply amount of the mixed liquid 3, the mixed liquid 4
6 can be selected to mix or shut off the inert gas 33, so that the mixed liquid 50 sprayed on the spray target 27 can be selected.
Is sprayed as a foamed layer or a layer without foaming. Further, the inert gas 33 mixed into the mixed solution 50 by the opening degree of the valve 48d.
Can be adjusted, so spray target 2
It is also possible to adjust the thickness of the foamed layer formed in No. 7. Further, after the spray gun 28 is used, the supply of the liquid materials 21 and 22 is stopped and the valve 48 is stopped.
By opening d and taking in the inert gas 33 into the nozzle 37, the liquids 21, 22 and the mixed liquids 46, 50 remaining in the nozzle 37 at the pressure of the inert gas 33 are taken out of the nozzle 37. Injection can also be performed, so that if necessary, simple cleaning of the inside of the nozzle 37 can be performed in order to prevent clogging of the injection port 51a.

Further, according to the spray gun 28 of the present embodiment, the spiral body 57 can be detached from the inert gas mixing section 49 so that the spiral body 57 can be removed if necessary.
Can be removed, cleaning the inside of the nozzle 37 after use of the spray gun 28, cleaning of the spiral body 57, etc.
This can be easily performed. Further, in some cases, the spiral body 57 can be exchanged, so that the spiral body 57 can be handled as a consumable item.

[Examples] A urethane rubber main agent (isocyanate component, corresponding to the liquid agent 21) and a urethane rubber curing agent (polyol component, corresponding to the liquid agent 22)
And "GET-10" as a two-part high-speed curable mixture of
0 "(trade name, manufactured by Daiflex Co., Ltd.) and carbon dioxide gas (corresponding to the inert gas 33) as a foaming gas, and these urethane rubber base agent, urethane rubber curing agent, and carbon dioxide Each gas supply pressure is 50kg / c
m ² , about 1.5 k on a slate plate (corresponding to the spray target 27) using the spray gun 28
By spraying at a rate of g / m ^2, a waterproof layer made of a urethane elastic foam having a thickness of about 3 mm was formed.

The urethane waterproofing layer thus obtained had an expansion ratio of 2, a tensile strength of 46 kg / cm ² , a tear strength of 21.5 kg / cm and an elongation of 480%. Further, a skin layer of about 0.1 mm was formed on the surface. The moisture permeability with this skin layer is 1
The skin permeability was removed at 90 g / m ² · 24 hours, and the moisture permeability was 390 g / m ² · 24 hours. In addition,
The moisture permeability of a general urethane waterproofing material is 40 to 50 g / m ^2.
24 hours. In addition, when the waterproofness was evaluated by a test method conforming to the watertightness test stipulated in the Architectural Institute of Japan, "Architectural Construction Standard Specifications / Commentary JASS 8 Waterproofing Work," a result with no change in water level was obtained. . Therefore, it was confirmed that by applying the spray gun 28 of the present invention to the curable mixture (GET-100), an extremely good urethane layer could be formed by physical foaming without using a chemical reaction of a liquid agent.

Next, a second embodiment of the present invention will be described below with reference to FIGS. FIG. 9 is a longitudinal sectional view for explaining the operation of the guide airflow injection mechanism of the present embodiment. FIG. 10 is a view for explaining the operation of the guide airflow injection mechanism, and is an enlarged view of a portion C in FIG. FIG. 11 is a side view for explaining the operation of the guide airflow injection mechanism in detail. FIG. 12 is a diagram for explaining the operation of the guide airflow injection mechanism in detail.
1 is a view seen from the DD line side. FIG. 13 is a perspective view showing a modified example of the guide airflow injection mechanism.

In the present embodiment, as shown in FIGS. 9 to 12, the spray gun 28 generates air 71 (air flow) flowing so as to cover the periphery of the mixed liquid 50 injected from a nozzle 70 (described later). Guide air jetting mechanism 72 for jetting
Since the present embodiment is different from the first embodiment in the point that it is provided with (guide airflow injection means), the description will be made focusing on this point, and the other points are the same as in the first embodiment, and the description thereof will be omitted.

The guide air injection mechanism 72 includes a nozzle 70
A plurality of guide air injection holes 70b (guide air flow injection holes) which are opened around the injection holes 70a and serve as air outlets for the air 71, and an air supply line for supplying compressed air 71 to the guide air injection holes 70b And an air supply source and a flow control valve (each not shown). The nozzle 70 is a component mounted in place of the nozzle tip portion 51 that injects only the mixed liquid 50, the nozzle 70a located at the center of the nozzle 70 when viewed in opposition, and the respective annularly arranged nozzles around the nozzle 70a. A guide air injection hole 70b is formed. The air supply source is a cylinder or the like that stores compressed air 71, and is connected to the guide air injection holes 70b of the nozzle 70 via the air supply line and the flow control valve so that air can be supplied.

According to this configuration, as shown in FIG. 9, the mixed liquid 50 injected from the injection port 70a of the nozzle 70 toward the spray target 27 guides the air 71 flowing so as to cover the periphery thereof without any gap. This causes a so-called tail phenomenon (a phenomenon in which the mixed liquid ejected from the nozzle comes into contact with the inner surface of the fluid space formed by the nozzle, causing the flow to become uneven and causing the resin to separate at the spray target). Since it can be prevented, it is possible to form a very good foamed layer 73 without resin separation. Further, as shown in FIG. 10, on the surface of the spray target 27 on which the foam layer 73 is formed, the air 71 acts as if it masks the periphery of the foam layer 73 (air along the surface of the spray target 27). Even if it tries to protrude from the outside, it is blocked by the air 71.), so that the foam layer 73 having a uniform thickness distribution can be formed. In addition, by covering the periphery of the mixed liquid 50 with the air 71 (air flow), it is possible to prevent the mixed liquid 50 from being scattered outward from the air flow. Further, since the scattering can be prevented, the mixed solution 50
Coating efficiency is improved.

The number and arrangement of the guide air injection holes 70b are not particularly limited.
As shown, when the downstream side is viewed from the upstream side (when the spraying target 27 side is viewed from the spray gun 28 side), a pair of first and second guide air injection holes are provided on the left and right around the injection port 70a. 75a, 75b, and third, fourth, fifth, sixth, seventh, and eighth guide air injection holes 75c, 75d, formed at three locations above and below the injection port 70a, respectively.
It has been confirmed that a preferable construction result can be obtained when these are formed so as to form an annular shape at a total of eight locations including 75e, 75f, 75g, and 75h. Note that the flow of the air 71 is not limited to the linear flow shown in FIGS. 11 and 12, and the direction of each guide air injection hole 70b may be appropriately adjusted, for example, as shown in FIG. It is also possible to adopt a configuration in which the airflow is formed while spirally covering the periphery of the 50 and guiding it.

In the present embodiment described above, the same effects as those of the first embodiment can be obtained, and furthermore, a more excellent foam layer 73 can be formed.

In the first and second embodiments, the spray gun 28 is applied to the waterproof construction device 20 for performing waterproof construction. However, the application is not limited to this. It can also be applied to other construction works such as spraying on the walls of buildings and buildings, and smoothing uneven surfaces, and filling the walls and floors with resin. In the second embodiment,
Although the mixed liquid 50 is covered with the air 71, the present invention is not limited to this, and another gas may be used.

[0049]

According to the spray gun of the first aspect of the present invention, the nozzle is provided with a stirring unit combining a stirring body having a plurality of stirring blades and a spiral forming a spiral flow path. It was adopted. According to this configuration, each liquid agent before being ejected from the nozzle to the outside is sufficiently stirred when being passed through the nozzle and then passing through the stirring blade of the stirring body and the spiral flow path of the spiral body. Can be efficiently mixed with each other.

In the spray gun according to the second aspect of the present invention, the nozzle is further provided with an inert gas supply section for supplying an inert gas to the mixed liquid of each liquid, and a mixed liquid supplied through the inert gas supply. Adopts a configuration that includes an inert gas mixing unit that mixes the active gas as bubbles, and a nozzle tip that has an opening that sprays the mixed solution that has passed through the inert gas mixing unit toward the object to be sprayed. did. According to this configuration, the mixed liquid can be foamed by mixing the inert gas into the mixed liquid as bubbles in the inert gas mixing section, so that the foam is generated by physical foaming without using a chemical reaction of the liquid. A layer can be formed.
In addition, the mixing of the inert gas further promotes the stirring of the respective liquids, so that even if each liquid is pumped at a relatively low pressure,
It becomes possible to mix each liquid medicine efficiently.

A spray gun according to a third aspect of the present invention has a structure in which a nozzle is provided with a liquid agent mixing section for mixing each of the liquid agents fed under pressure, and the liquid agent mixing section is provided with a stirrer having a plurality of stirring blades. It was adopted. According to this configuration, each liquid agent before reaching the inert gas mixing unit can be stirred by the stirrer of the liquid agent mixing unit, so that each liquid agent can be mixed well without mixing unevenness.

According to the spray gun of the fourth aspect, the stirrer can be detached as necessary by making the stirrer detachable from the inside of the nozzle, so that the inside of the nozzle can be cleaned after the spray gun is used. It becomes possible to easily perform cleaning of the stirrer and the like. Further, in some cases, the stirrer can be replaced, so that the stirrer can be handled as a consumable item.

According to the spray gun of the fifth aspect, since the nozzle is provided with a valve capable of adjusting the supply amount of the inert gas to the mixed liquid, the valve can be operated to supply the mixed liquid. Can be selected to mix or shut off the inert gas, so that it is possible to select to spray the mixed solution sprayed on the spray target as a foamed layer or a layer without foaming. In addition, since the amount of the inert gas mixed into the liquid mixture can be adjusted by the degree of opening of the valve, the thickness of the foam layer formed on the object to be sprayed can be adjusted. Furthermore, after the spray gun is used, the valve is opened and the inert gas is introduced into the nozzle in a state where the supply of each liquid agent is stopped. Since the liquid agent can be ejected to the outside of the nozzle, if necessary, the inside of the nozzle can be easily cleaned to prevent clogging of the ejection port.

According to the spray gun of the sixth aspect, the spiral body is configured to be detachable from the inside of the nozzle, so that the spiral body can be removed as needed. Cleaning and the like can be easily performed. Further, in some cases, the spiral body can be replaced, so that the spiral body can be handled as a consumable.

Further, the spray gun according to claim 7 employs a configuration in which a guide airflow injection means for injecting an airflow that flows so as to cover the periphery of the mixed liquid agent injected from the nozzle is provided. According to this configuration, the liquid mixture injected from the injection port of the nozzle toward the object to be sprayed can be prevented from generating a so-called tail phenomenon by being guided by an airflow flowing so as to cover the periphery thereof. It is possible to form a suitable foamed layer. Further, by covering the periphery of the mixed solution with an airflow, it is possible to prevent the mixed solution from scattering from the airflow toward the outside. Further, since the scattering can be prevented, the application efficiency of the mixed solution is improved.

Further, the spray gun according to claim 8 employs a configuration in which the guide airflow injection means has a guide airflow injection hole which is opened around the injection port of the nozzle and serves as an airflow outlet. According to this configuration, by adjusting the number and diameter of the guide airflow injection holes, the flow rate of the airflow can be appropriately adjusted according to the flow rate of the mixed liquid agent. Furthermore, by appropriately adjusting the direction of each guide airflow injection hole, it becomes possible to form an airflow that covers and surrounds the liquid mixture while guiding it spirally.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of a waterproof construction apparatus provided with a spray gun according to the present invention, and is a schematic device configuration diagram.

FIG. 2 is a side view showing the spray gun of the embodiment.

FIG. 3 is a view showing the spray gun according to the embodiment, as viewed from the line BB in FIG. 2;

FIG. 4 is a perspective view showing a nozzle of the spray gun according to the embodiment.

FIG. 5 is an exploded perspective view showing a nozzle of the spray gun according to the embodiment.

FIG. 6 is a sectional view showing a nozzle of the spray gun according to the embodiment.

FIG. 7 is a perspective view showing components inside a nozzle of the spray gun according to the embodiment.

FIG. 8 is a perspective view showing another part in the nozzle of the spray gun according to the embodiment.

FIG. 9 is a view showing a second embodiment of the waterproof construction apparatus provided with the spray gun according to the present invention, and is a longitudinal sectional view for explaining the operation of the guide airflow injection mechanism.

FIG. 10 is a diagram for explaining the operation of the guide airflow injection mechanism of the spray gun according to the embodiment, and is an enlarged view of a portion C in FIG. 9;

FIG. 11 is a side view for explaining in detail the operation of the guide airflow injection mechanism of the spray gun according to the embodiment.

12 is a view for explaining the operation of the guide airflow injection mechanism of the spray gun of the embodiment in detail, and is a view as seen from the line DD in FIG. 11;

FIG. 13 is a perspective view showing a modification of the guide airflow injection mechanism of the spray gun according to the embodiment.

FIG. 14 is a cross-sectional view showing a construction example of a conventional urethane waterproofing material.

FIG. 15 is a diagram showing an example of a waterproof construction device provided with a conventional spray gun, and is a schematic device configuration diagram.

[Explanation of symbols]

21, 22 ... Liquid 27 ... Spray target 28 ... Spray gun 33 ... Inert gas 37, 70 ... Nozzle 45 ... Liquid mixing section 46, 50 ... Mixed liquid 48 ... ..Inert gas supply section 48d ... valve 49 ... inert gas mixing section 51 ... nozzle tip 51a, 70a ... injection port 52 ... stirring body 52a, 52b ... stirring blade 57: spiral body 57f: spiral flow path 70b, 75a, 75b, 75c, 75d, 75e, 7
5f, 75g, 75h: Guide air injection hole (guide air flow injection hole) 71: Air (air flow) 72: Guide air injection mechanism (guide air flow injection means)

Claims (8)

[Claims] 1. A spray gun for mixing a plurality of pressure-fed liquids and spraying the mixture by directing a nozzle toward a spray target, wherein the nozzle has a stirrer having a plurality of stirring blades and a spiral flow path. A spray gun characterized by having a stirring section in combination with a spiral body. 2. The spray gun according to claim 1, wherein the nozzle further includes an inert gas supply unit configured to supply an inert gas to the mixture of the respective liquid materials, and the inert gas supply unit passing through the inert gas supply unit. An inert gas mixing section that mixes the inert gas into the mixed liquid as bubbles, and a nozzle tip having an injection opening that injects the mixed liquid that has passed through the inert gas mixing section toward the spray target. A spray gun characterized by being provided. 3. The spray gun according to claim 1, wherein the nozzle is provided with a liquid material mixing section for mixing the pressure-fed liquid materials, and the liquid material mixing section is provided with the stirring body. A spray gun characterized in that: 4. The spray gun according to claim 1, wherein the stirring body is detachable from the nozzle. 5. The spray gun according to claim 2, wherein the nozzle is provided with a valve capable of adjusting a supply amount of the inert gas to the liquid mixture. And spray gun. 6. The spray gun according to claim 1, wherein the spiral body is detachable from the nozzle. 7. The spray gun according to claim 1, further comprising: a guide airflow injection unit that injects an airflow that flows so as to cover a periphery of the mixed liquid agent injected from the nozzle. A spray gun characterized by the following. 8. The spray gun according to claim 7, wherein the guide airflow injection means has a guide airflow injection hole which is opened around the injection port of the nozzle and serves as an airflow outlet. A spray gun characterized by the following.