JP3868881B2 - Waterproof membrane construction method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproof membrane construction method and apparatus that can easily construct a high-quality urethane waterproof membrane as long as there is only a compressed air source using a cartridge.
[0002]
[Prior art]
As a waterproof construction method for large-scale construction surfaces such as rooftops of concrete buildings and inner walls of pools, urethane waterproofing membranes are prepared by mixing high-speed curing urethane resin main agent liquid and its curing agent liquid and spraying on the construction surface. A method of forming is known. In particular, as a suitable construction method, the high-speed curing urethane resin main component liquid and the curing agent liquid are respectively pumped to the static mixing section by controlling the flow rate using a motor-driven gear pump, and both liquids are mixed in this static mixing section. After that, the mixed liquid is put on the flow of compressed air flowing through the air path between the static mixing part and the outer cylinder covering it at the discharge port part of the static mixing part, and ejected from the nozzle part to the construction surface There is known a method of efficiently forming a high-quality urethane waterproof film having a predetermined thickness and not permeating water but permeating water vapor and having high adhesion strength by one spraying (see FIG. For example, see Patent Document 1.)
[0003]
On the other hand, in the caulking work that is a relatively small-scale construction, a cartridge containing a caulking agent is used, and the cartridge is mounted on the discharge gun device so that the cartridge is installed in the cylinder device provided in the discharge gun device. A method is known in which an inner piston is pushed and a caulking agent is discharged from an outlet of a cartridge.
[0004]
[Patent Document 1]
Japanese Patent No. 3248554.
[0005]
[Problems to be solved by the invention]
However, in the above conventional waterproof membrane construction method, two systems of pumping devices equipped with a motor-driven gear pump for supplying two kinds of liquids at a predetermined flow rate, a compressed air source, and a jet incorporating a static mixing unit When a large-scale construction device consisting of a gun device is required, and a waterproof membrane is to be constructed on a relatively small work piece, it takes a lot of time and effort to prepare for construction compared to the construction time. As a result, there is a problem that the cost is increased.
[0006]
In addition, it was considered to apply the cartridge method applied to the above caulking work as a means of simplifying the construction, but even if the construction is carried out using the discharge gun device for the caulking work as it is, both liquids are simply used. Since it is only mixed and discharged onto the work piece, a high-quality urethane waterproof membrane cannot be formed, and it is required to be able to easily implement the waterproof membrane construction method on a small-scale construction surface. It was.
[0007]
The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a waterproof membrane construction method and apparatus capable of simply constructing a high-quality urethane waterproof membrane if there is only a compressed air source using a cartridge. And
[0008]
[Means for Solving the Problems]
The waterproof membrane construction method of the present invention is a cylinder device connected to a compressed air source using a cartridge that stores a high-speed curing urethane resin main component liquid and its curing agent liquid separately and discharges each liquid by pressing a piston. Press the piston of the cartridge to discharge each liquid from the cartridge, mix and discharge each discharged liquid at the static mixing section, and supply compressed air supplied from the compressed air source around the discharged mixed liquid Forming a blown air flow, spraying each liquid mixed in the blown air flow on the work piece to form a urethane waterproof film, using a cartridge containing two liquids and a single compressed air It can be applied easily by operating the cylinder device at the source and forming a blown air flow, and the mixture is applied by the blown air flow formed around it. Can construction quality Polyurethane film by spraying the objects, an effect that a high-quality urethane waterproofing membrane can be inexpensively construction relatively small construction surface.
[0009]
In addition, when compressed air is ejected from a plurality of locations around the discharge port of the static mixing section in a substantially ejection direction, a single simple compressed air source having a relatively small capacity is used as both the drive source and the ejection air source of the cylinder device. Even if the air pressure and air flow rate of the ejected air flow are relatively small, the mixed liquid can be reliably put on the ejected air stream ejected from a plurality of locations and sprayed onto the construction surface. High quality urethane waterproof membrane can be formed.
[0010]
Moreover, the waterproof membrane construction apparatus of the present invention separately installs a high-speed curing urethane resin main agent liquid and its curing agent liquid, and discharges each liquid by pressing the piston, and the cartridge is detachably installed. An installation unit, a cylinder device that presses the piston of the cartridge, a static mixing unit that mixes each liquid discharged from the cartridge, and a compressed liquid is ejected from the periphery of the discharge port of the static mixing unit in a substantially discharging direction. Is provided with an air ejection cylinder body that is put on compressed air and ejected from a jet outlet at the tip, and a compressed air supply section that supplies compressed air to the cylinder device and the air ejection cylinder body. It is possible to implement a high-quality urethane waterproof membrane easily and inexpensively on a relatively small construction surface.
[0011]
Further, when a plurality of ejection passages for ejecting compressed air in substantially the ejection direction are provided in the peripheral portion of the discharge port of the static mixing section in the air ejection cylinder, a single simple and relatively small capacity as described above. A high-quality urethane waterproof membrane can be formed using a compressed air source. It may be more effective to twist the plurality of ejection passages.
[0012]
In addition, compressed air is supplied to the compressed air supply unit between the compressed air source, the cylinder device, and the air ejection cylinder in the first stage of the trigger operation, and in the second stage. When equipped with an air switching valve that supplies compressed air to both the body and the cylinder device, a one-touch operation of the trigger forms a jet air flow at the first stage and then discharges the liquid mixture at the second stage. Therefore, there is no risk of causing a problem such that the mixed liquid is discharged first due to an operation error and the mixed liquid accumulates, and the mixed liquid cannot be smoothly sprayed on the work piece by the jet air flow. Easy to use.
[0013]
In addition, the cylinder device is provided at the rear of the main body frame provided with the grip portion, the installation portion of the cartridge is provided at the front portion, and the static mixing portion is fitted and attached to the discharge outlet common to each liquid of the cartridge, The ejection cylinder is fitted from the front end side of the static mixing part, and its base end part is fastened and fixed to the front end of the main body frame, and in that state, it is connected to an air passage formed in the main body frame, and an air supply source is provided to the grip part. When the compressed air supply operation means is provided for the air passage connected to the cylinder device and the air jet cylinder, the air supply source is connected to the grip portion, and the cartridge is installed at the front of the main body frame. , With one hand supporting the main body and the other hand holding the grip, the tip spout is directed to the construction surface, and the grip operating part is operated and waterproof. A membrane can be applied.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the waterproof membrane construction method and apparatus of the present invention will be described with reference to FIGS.
[0015]
In FIG. 1 to FIG. 3, reference numeral 1 denotes a spray gun apparatus for constructing a waterproof film, and a grip portion 3 projects from a lower portion of a rear portion 2 a of the main body frame 2. A cylinder device 5 having two piston rods 4 a and 4 b is disposed on the rear portion 2 a of the main body frame 2. The rear ends of the piston rods 4a and 4b are coupled to a single piston 6, and pressing portions 7a and 7b are integrally provided at the tip.
[0016]
The front portion 2b of the main body frame 2 is provided with an installation portion 8 for detachably installing a fast curing urethane resin main agent liquid and a cartridge 11 containing the curing agent liquid. The front end member 8a of the installation portion 8 is formed with a U-shaped mounting opening 9 having an open upper end formed with a holding guide groove 10 on the inner peripheral surface, and a pair of cylinders with the upper and lower portions of the cylinder removed on both sides of the lower end portion. The arc-shaped fixed protrusion 12 protrudes and a fixing screw 13 is formed on the outer periphery thereof.
[0017]
The cartridge 11 has a pair of storage cylinders 14a and 14b that separately store a fast curing urethane resin main agent liquid and the curing agent liquid. The accommodating cylinders 14a and 14b are connected to each other by a connecting part 15 provided at the front end part, and are connected to a discharge port 16 projecting at the center of the connecting part 15 via communication passages 17a and 17b, respectively. It is communicated. On the outer periphery of the connecting portion 15, an oval mounting plate 18 that protrudes into the mounting opening 9 and whose outer peripheral edge engages with the holding guide groove 10 is projected.
[0018]
Pistons 19a and 19b that close the rear ends of the accommodating cylinders 14a and 14b in a state where the liquid agent is accommodated are slidably fitted, and the pistons 19a and 19b are synchronized with the pressing parts 7a and 7b. The two liquid agents are mixed by a predetermined amount and discharged from the discharge port 16 by being pressed. The mixing ratio of the two liquid agents is defined according to the ratio of the inner cross-sectional areas of the housing cylinder portions 14a and 14b, and is set to be equal in the illustrated example.
[0019]
A base end portion 20 a of the static mixing unit 20 is screwed and attached to the discharge port 16 of the cartridge 11 installed in the installation unit 8. The static mixing section 20 has a plurality of screw guides fixed inside, and the liquid guides are mutually connected by these screw guides while the liquid circulates from the base end portion 20a toward the discharge port 21 at the front end. The liquid agent that is mixed and uniformly mixed is discharged from the discharge port 21 at the tip. In addition, the front-end | tip part 20b of the static mixing part 20 is comprised by the step-like taper part.
[0020]
On the outer periphery of the static mixing unit 20, an air ejection cylinder 23 that forms a cylindrical air passage 22 is fitted from the front end side, and a fixed collar part protruding from the outer periphery of the base end of the air ejection cylinder 23. The nut 23a is fastened and fixed by a ring nut 24 that is screwed onto the fixing screw 13 in a state where the tip 23a is in contact with the tip of the fixing protrusion 12.
[0021]
The front end of the air ejection cylinder 23 covers the discharge port 21 of the static mixing unit 20, and the compressed air is ejected from the periphery of the discharge port 21 in a substantially discharge direction. A spout gold 25 to be ejected from the spout 26 is screwed. As shown in detail in FIG. 4, a plurality of (in the illustrated example, four) ejection passages 27 in the circumferential direction for ejecting compressed air substantially in the ejection direction are formed around the ejection outlet 25. Has been. In addition, the inner peripheral surface between these ejection passages 27 is fitted in close proximity or close to the outer peripheral surface of the distal end portion 20b of the static mixing unit 20. Further, these ejection passages 27 may be appropriately twisted.
[0022]
At the lower end of the grip portion 3, a connection portion 29 with an air hose 28 extending from a compressed air source (not shown) is disposed. An air switching valve 31 connected to the connection portion 29 via the air passage 30 is disposed at the upper portion of the grip portion 3. As shown in FIG. 5A, the air switching valve 31 presses and drives the inlet 31 a connected to the air passage 30, the ejection outlet 31 b communicated with the cylindrical air passage 22, and the piston 6 of the cylinder device 5. When the valve body 32 is normally closed by the valve body 32 and the valve body 32 is moved downward against the urging force of the spring 33, In the first stage, only the ejection outlet 31b is opened as shown in FIG. 5 (b), and then in the second stage, both the ejection outlet 31b and the pressing outlet 31c are opened as shown in FIG. 5 (c). It is configured. The valve body 32 is provided with an operation shaft 32 a protruding upward, a rear end is pivotally supported by a support shaft 34 so as to be swingable up and down, and a trigger 35 having a front end operation portion protruding forward of the grip portion 3. The operation shaft 32a is engaged with an intermediate portion of the valve body, and the valve body 32 is moved downward by pulling the trigger 35 obliquely downward.
[0023]
The air passage 36 connected to the ejection outlet 31b communicates with a connection projection 37 provided at the lower part of the front end member 8a of the installation portion 8. The air ejection cylinder 23 is provided with an L-shaped connection pipe 38 in the vicinity of the base end thereof, one end communicating with the cylindrical air passage 22 and the other end hermetically fitted to the connection projection 37. Further, the air ejection cylinder 23 is in pressure contact with the outer peripheral surface of the static mixing unit 20 on the proximal end side from the connection portion with the connection pipe 38 so that the compressed air flows toward the distal end side of the cylindrical air passage 22. A sealing material 29 is disposed.
[0024]
The air passage 40 connected to the pressing outlet 31 c communicates with the pressing pneumatic chamber 5 a at the rear portion of the piston 6 through a switching relief valve mechanism 41 disposed at the rear end portion of the cylinder device 5. As shown in FIG. 6A, the switching relief valve mechanism 41 supplies an air introduction passage 42 for introducing the compressed air introduced from the air passage 40 into the pressing air pressure chamber 5a, and air in the pressing air pressure chamber 5a. A relief passage 43 that discharges to the outside, a valve body 44 that is movable between two positions that alternatively brings the air introduction passage 42 and the relief passage 43 into a conductive state, and the valve body 44 is always in a conductive state through the relief passage 43. When the pressure is introduced from the air passage 40, the valve body 44 is in a position to bring the air introduction passage 42 into a conductive state, as shown in FIG. 6B. Is configured to move.
[0025]
Further, a return air outlet 46 for returning the piston 6 of the cylinder device 5 is branched from the connection portion 29 at the lower end of the grip portion 3, and is connected to an air passage 48 via a return operation valve 47. 48 is connected to the return pneumatic chamber 5b in the front part of the piston 6 of the cylinder device 5. As shown in FIG. 7A, the return operation valve 47 includes an inlet 47a connected to the return air outlet 46, an outlet 47b connected to the air passage 48, and a valve body 49 that opens and closes the outlet 47b. The valve body 49 extends forward and is coupled to a push switch 50 disposed on the front surface of the lower end of the grip portion 3, and a spring 51 interposed between the push switch 50 and the return operation valve 47. The valve body 49 is urged to move to a position where it is always closed. Then, as shown in FIG. 7B, when the pressing switch 50 is pressed, the compressed air is supplied to the return pneumatic chamber 5b of the cylinder device 5 through the air passage 48, and the piston 6 moves back. Has been.
[0026]
When constructing a waterproof membrane using the spray gun apparatus 1 having the above configuration, first, connection with an air supply source (not shown) and assembly of the cartridge 11 and the like are performed. That is, the air hose 28 extended from the air supply source is connected to the connection portion 29 at the lower end of the grip portion 3 of the main body frame 2, and the U-shaped attachment formed on the front end member 8 a of the installation portion 8 of the main body frame 2 The mounting plate 18 of the cartridge 11 is inserted into the holding guide groove 10 of the opening 9 to install the cartridge 11 in the installation portion 8, and the base end portion 20 a of the static mixing unit 20 is screwed into the discharge port 16 of the cartridge 11 and attached. Then, the air jet cylinder 23 is fitted from the front end side of the static mixing portion 20 and fastened and fixed to the fixed projection 12 of the front end member 8a by the ring nut 24, and the connection pipe 38 is fitted to the connection projection 37. By connecting, the assembly of the spray gun apparatus 1 is completed.
[0027]
Next, with the front part 2b of the main body frame 2 of the spray gun apparatus 1 supported by one hand and holding the grip part 3 by the other hand, the tip outlet 26 is directed to the construction surface, and the grip part 3 is operated. Then, in the first stage of the operation of the trigger 35, first, a jet air flow is formed from the cylindrical air passage 22 toward the jet outlet 26, and then, in the second stage, the piston 6 of the cylinder device 5 is operated and the cartridge 11 is operated. The fast-curing urethane resin main component liquid and the curing agent liquid stored in the storage cylinders 14a and 14b are pressed by the pistons 19a and 19b, and discharged from the discharge port 16 at a predetermined flow rate ratio. The liquid is subsequently uniformly mixed in the static mixing unit 20 and discharged from the discharge port 21. The discharged mixed liquid is put on the above-described jet air flow formed around the liquid and is applied from the discharge port 26. A urethane waterproof membrane is formed by spraying on objects.
[0028]
In this way, using the cartridge 11 containing two liquids and operating a cylinder device 5 by a single compressed air source (not shown), a jet air flow is formed around the jet outlet 21 to eject the mixed liquid. Since it is put on the air flow and ejected from the jet outlet 26 and sprayed onto the work piece, it is possible to construct a waterproof film very easily and with good workability and to construct a high-quality urethane waterproof film. . Therefore, it is possible to construct a high-quality urethane waterproof film at a low cost for a relatively small-scale workpiece.
[0029]
Further, since the compressed air is ejected from the plurality of ejection passages 27 around the ejection port 21 of the static mixing unit 20 in the substantially ejection direction, a single simple and relatively small capacity compressed air source is used as the cylinder. By using it for both the drive source of the device 5 and the jet air source, even if the air pressure and the air flow rate of the jet air flow become relatively small, it is ensured that the mixed liquid is jetted from a plurality of locations. It can be placed and sprayed onto the work piece, and a high-quality urethane waterproof membrane can be formed.
[0030]
In addition, by simply performing a one-touch operation on the trigger 35 of the air switching valve 31, an air flow is first formed in the first stage, and then the liquid mixture is discharged in the second stage. However, there is no fear of causing a problem that the liquid mixture accumulates and the liquid mixture accumulates and the liquid mixture cannot be smoothly sprayed onto the work piece by the jet air flow, and it is easy to use.
[0031]
【The invention's effect】
According to the waterproof film construction method and apparatus of the present invention, a high-speed curing urethane resin main component liquid and its curing agent liquid are separately stored and used, and a cartridge that discharges each liquid by pressing a piston is used as a compressed air source. Pressing the piston of the cartridge with the connected cylinder device discharges each liquid from the cartridge, mixes and discharges each discharged liquid at the static mixing unit, and supplies it from the compressed air source around the discharged mixed liquid The compressed air is used to form a blown air flow, and each liquid mixed in the blown air flow is sprayed onto the work surface to form a urethane waterproof film. The cylinder device is operated with a single compressed air source, and a jetting air flow can be formed. The high-quality urethane waterproof membrane can be constructed by spraying the construction surface with air flow, and the high-quality urethane waterproof membrane can be constructed inexpensively on a relatively small construction surface. Play.
[Brief description of the drawings]
FIG. 1 shows a spray gun device in one embodiment of a waterproof membrane construction apparatus of the present invention, wherein (a) is a plan view and (b) is a partial sectional front view.
FIG. 2 is a longitudinal front view of the distal end portion of the ejection gun device of the same embodiment.
FIG. 3 is an exploded perspective view of a distal end portion of the ejection gun device of the same embodiment.
FIGS. 4A and 4B show an ejection nozzle gold of an air ejection cylinder body at a distal end portion of the ejection gun device of the embodiment, wherein FIG. 4A is a longitudinal front view, and FIG.
FIG. 5 shows an air switching valve of the ejection gun device of the same embodiment, (a) is a partial sectional front view, and (b), (c) are sectional front views showing an operating state.
6A and 6B show a switching relief valve mechanism of a cylinder device in the ejection gun device of the embodiment, wherein FIG. 6A is a sectional front view, and FIG. 6B is a sectional front view in an operating state;
FIGS. 7A and 7B show a return switching valve of a cylinder device in the ejection gun device of the same embodiment, wherein FIG. 7A is a sectional front view, and FIG. 7B is a sectional front view in an operating state;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Jet gun apparatus 2 Main body frame 3 Grip part 5 Cylinder apparatus 8 Installation part 11 Cartridge 16 Discharge port 19a, 19b Piston 20 Static mixing part 21 Discharge port 23 Air ejection cylinder 26 Jet outlet 27 Jet passage 29 Connection part 31 Air switching Valve 35 Trigger 36 Air passage 40 Air passage

Claims (6)

Using a cartridge that separates and stores the high-speed curing urethane resin main component liquid and its curing agent liquid and discharges each liquid by pressing the piston, press the piston of the cartridge with a cylinder device connected to the compressed air source Each liquid is discharged from the cartridge, each discharged liquid is mixed and discharged in the static mixing unit, and a jet air flow is formed around the discharged mixed liquid by the compressed air supplied from the compressed air source, A waterproof membrane construction method characterized in that a urethane waterproof membrane is formed by spraying each liquid mixed in a jet air flow onto an object to be constructed. The waterproof film construction method according to claim 1, wherein compressed air is ejected from a plurality of locations around a discharge port of the static mixing unit in a substantially discharge direction. A cartridge that separately stores a high-speed curing urethane resin main component liquid and its curing agent liquid, and discharges each liquid by pressing the piston, an installation portion that detachably installs the cartridge, and a cylinder that presses the piston of the cartridge The device, the static mixing unit that mixes each liquid discharged from the cartridge, and the compressed air is ejected from the periphery of the discharge port of the static mixing unit in a substantially discharging direction, and the mixed solution is placed on the compressed air from the outlet at the tip. A waterproof membrane construction apparatus comprising: an air ejection cylinder body to be ejected; a cylinder apparatus; and a compressed air supply section for supplying compressed air to the air ejection cylinder body. 4. The waterproof film construction apparatus according to claim 3, wherein a plurality of ejection passages for ejecting compressed air in a substantially ejection direction are provided around a discharge port of the static mixing portion in the air ejection cylinder. The compressed air supply unit supplies compressed air to the air ejection cylinder in the first stage of the trigger operation between the compressed air source, the cylinder device, and the air ejection cylinder, and the air ejection cylinder in the second stage. The waterproof membrane construction apparatus according to claim 3 or 4, further comprising an air switching valve for supplying compressed air to both of the cylinder devices. A cylinder device is provided at the rear part of the main body frame provided with the grip part, a cartridge installation part is provided at the front part, and the static mixing part is fitted and attached to the discharge port common to each liquid of the cartridge, and the air ejection cylinder The body is fitted from the front end side of the static mixing part, the base end part is fastened and fixed to the front end of the main body frame, and in that state, connected to the air passage formed in the main body frame, and the grip part is connected to the air supply source The waterproof film construction apparatus according to any one of claims 3 to 5, further comprising a compressed air supply operation means for an air passage connected to the part, the cylinder device, and the air ejection cylinder.

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