JP2004351635A - Water barrier sheet fusion-bonding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water barrier sheet fusion-bonding device capable of extremely simplifying air passing member arranging work capable of advancing fusion-bonding work while supplying the air passing member to the gap between bifuracated nozzles by an air passing member guide. <P>SOLUTION: The water barrier sheet fusion-bonding device 1 is used when the air passing member is interposed between the joining parts of water barrier sheets superposed one upon another and the water barrier sheets are heated and melted to be fusion-bonded and composed of the bifurcated nozzle parts 3 and 3' connected to a hot air generator 2 and the air passing member guide 4 arranged between the bifurcated nozzle parts. Further, a hot air port position visually confirming member 5 capable of confirming the positions of the hot air ports 3a and 3a' from the place above the water barrier sheets is arranged. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a water-blocking sheet fusion device used when joining water-blocking sheets to each other by heat fusion, and more specifically, a ventilation member for inspecting a joint failure of a water-blocking sheet at a bonding portion. The present invention relates to a water-blocking sheet fusing device that can perform heat fusion, easily confirm the position of a nozzle tip during a heating operation, and has excellent workability.
[0002]
[Prior art]
Materials used as waterproof sheets (or sometimes referred to as waterproof sheets) laid on waste disposal sites, building rooftops, reservoirs, etc. are made of synthetic resins such as polyvinyl chloride resin and polyethylene, and ethylene propylene. Examples thereof include those made of vulcanized rubber such as a diene monomer (EPDM) and water-blocking sheets made of asphalt-based materials such as asphalt or rubber asphalt. Then, a work is performed in which a water-impervious sheet having a predetermined width made of such a material is laid on the base, and the adjacent water-impervious sheets are joined together to cover the entire surface of the base with the water-impervious sheet.
[0003]
If there is a joint failure at the joint between the water-impervious sheets, water leakage will occur from the joint, so that an inspection of the joint is required to eliminate the defect and prevent water leakage.
[0004]
Conventionally, for the inspection of the joint part of the water-blocking sheet, an adhesion test of the joint part is performed by a sampling test, or at the construction site, an unattached part is provided at the joint part, and pressurization inspection with air is suitable. It was evaluated that air was injected into the unattached portion of the sheet joint and maintained at a constant pressure for a certain period of time. However, this method is suitable for waterproofing sheets made of synthetic resin such as vinyl chloride resin.On the other hand, in the case of a sheet made of rubber or the like, the bonding portion is in an adhesive state and has a relatively low modulus. However, there is a problem that the pressure may be reduced even if it is not so that the defective portion cannot be determined correctly.
[0005]
As another method, there is a method of detecting a defective portion by bringing an ultrasonic inspection machine into contact with a joining portion, but this method can be applied to a resin sheet, but a foreign adhesive layer is interposed. There is a problem that cannot be applied to a rubber sheet.
[0006]
Further, to improve this, the present applicant inserts a needle portion provided with a smoke blower into an unattached portion of the pre-formed water-impervious sheet joint, and after injecting smoke from a through hole of the needle portion, A method of observing a location where the smoke flows out of the sheet has been proposed (Patent Document 1).
[0007]
In addition, Patent Document 2 discloses a hot-air fusing device used to overlap end portions of a waterproof sheet made of an olefin-based thermoplastic elastomer and fuse them with hot air.
[0008]
[Patent Document 1]
JP-A-63-182134 [Patent Document 2]
Japanese Patent Application Laid-Open No. 2000-64522
[Problems to be solved by the invention]
However, in the case of a waterproof sheet made of asphalt-based material such as asphalt or rubber asphalt, the joining method is to heat the end of the waterproof sheet to be joined with, for example, a torch to melt the asphalt-based material, and then overlap them. They are joined together. Therefore, it is difficult to secure a ventilation path and create a partial unjoined portion for sending air or the like for inspection.
[0010]
Therefore, using a hollow rope made of a material such as carbon fiber that can withstand the asphalt in a high-temperature state as a ventilation member, securing a ventilation path by interposing it at the joint between the sheets, and using the ventilation path It is conceivable to perform an inspection for bonding failure. However, accurately arranging such a ventilation member at the joint where the end of the sheet is melted by hot air is a very laborious operation.
[0011]
Also, in the case of a sheet made of asphalt-based material, for example, compared to resin materials such as olefin-based thermoplastic elastomers and polyvinyl chloride, the peeling strength of the joint due to fusion is small. Need to be wider. In order to form a wide joint, the overlap margin of the sheet becomes large, the fuser also becomes large, and the part hidden by the sheet when heated with hot air becomes large, so the workability also deteriorates, There is a problem that defects easily occur.
[0012]
Actually, the work of heat-sealing the joint is performed by inserting the nozzle of the fuser while overlapping the sheet edges, sending hot air and rolling the melted part of the joint surface from above with a roller etc. Since the position of the hot air port of the fuser cannot be directly seen by the operator's eyes, the position of the hot air port is determined by visual measurement, That is the current situation. When the overlap margin is small, deviation from the actual melting point is not likely to occur even by visual measurement, but when the overlay margin is large, the deviation between the actual measurement and the actual position tends to increase, This may cause poor bonding.
[0013]
Therefore, the present invention solves the above-described problems, and a ventilation member can be easily interposed at a joint portion to be heat-sealed. It is an object of the present invention to provide a water-blocking sheet fusion splicer in which the position of the mouth can be visually recognized from above the water-blocking sheet, the melted portion can be reliably rolled, and the occurrence of poor bonding is less likely to occur.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a water-permeable sheet having a large number of holes is interposed at a joint portion where the water-permeable sheets are overlapped with each other, and the water-permeable sheets located on both sides of the gas-permeable member are provided. In a water-blocking sheet fuser used when heat-fusing and fusing a sheet, a forked nozzle portion connected to a hot air generator and a ventilation member guide disposed between the forked nozzles are provided. Features.
[0015]
The fusing operation can be advanced while the ventilation member is supplied between the forked nozzles by the ventilation member guide, so that the operation of disposing the ventilation member can be made extremely simple.
[0016]
In the second aspect, a water-sealing sheet fusion device is provided in which a hot-air-port-position visually recognizing member is disposed so that the position of the hot air port can be confirmed from the upper water-impervious sheet in a state where the nozzle portion is disposed between the upper and lower water-impermeable sheets and heated and melted. And
[0017]
The provision of the hot-air port position visualizing member allows the molten portion to be confirmed from above the impermeable sheet, so that it is possible to prevent poor joining due to a displacement of the rolling compaction location.
[0018]
In the third aspect, the water-blocking sheet is a water-blocking sheet fusing device made of an asphalt-based material. In the case of a water-blocking sheet made of asphalt, the peel strength per unit area in the bonding portion tends to be small. It is necessary to increase the area of the sheet and increase the bonding strength, so the margin of the impermeable sheet must be increased, but in such a case, the gap between the melting point and the rolling point due to the hot air occurs. Although it is easy, the effect of the waterproof sheet fuser of the present invention can be obtained more remarkably.
[0019]
In the fourth aspect, the member for visually confirming the position of the hot air port is a rod-shaped body extending from the main body of the water impermeable sheet, and disposed on the water impermeable sheet in parallel with the side forming the outer contour of the nozzle tip. It is a kimono.
[0020]
Since the position of the tip of the nozzle can be confirmed more accurately, the working efficiency can be further improved.
[0021]
In the fifth aspect, the ventilation member guide is a water-blocking sheet fuser which is a ring body attached at a predetermined interval between the forked nozzles.
[0022]
The ventilation member can be reliably guided to a predetermined position, and can be easily provided at low cost.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, specific embodiments for fusing a water-impermeable sheet using the water-impermeable sheet fusion device of the present invention will be described with reference to the accompanying drawings.
[0024]
FIG. 1 is a perspective view showing the joining of the water-impervious sheet by the water-impervious sheet fuser of the present invention, and FIG. 2 is a perspective view of the water-impervious sheet fuser. FIG. 3 is a cross-sectional view of the joint portion of the impermeable sheet, FIG. 4 is a plan view thereof, and FIG. 5 is a perspective view showing an example of the ventilation member.
[0025]
The joint portion 11 to be joined by the waterproof sheet fuser 1 of the present invention is a joint portion as shown in FIG. 3, and the ends of the upper waterproof sheet 12 and the lower waterproof sheet 13 are overlapped. A joining portion 11 is formed, and the superimposed surfaces of the upper and lower impermeable sheets 12 and 13 are heated and fused by hot air using the impermeable sheet fusing device 1 of the present invention at the time of overlapping. In order to secure an air passage 14 through which a gas such as air can freely pass between the upper and lower water impermeable sheets 12 and 13 of the joint portion 11, a ventilation member 16 formed of a tube having a large number of holes 15 in a wall surface is provided. Is interposed. The inside and outside of the ventilation member 16 are communicated with each other by a large number of holes 15 in the wall surface, so that pressurized air flowing in the ventilation member 16 can exit through the holes 15.
[0026]
The water-blocking sheet fuser 1 includes a hot air generator P, a tubular body 2 connected to the hot air generator P, and flat nozzles 3 and 3 ′ that are bifurcated, and a ventilation member disposed between the nozzles 3 and 3 ′. The guide 4 extends substantially parallel to the side A forming the outer periphery of the hot air vents 3a, 3a ', which are the tips of the nozzles, and appears on the upper water-impervious sheet 12 so that the operator can position the hot air vents 3a, 3a'. The member 5 is provided with a rod-shaped hot-air port position visually recognizable member 5 for visually recognizing the position.
[0027]
Two rows of fusion are performed by the forked nozzles 3 and 3 ′, and a ventilation member 16 is interposed therebetween. However, the water shielding sheet fusion device 1 of the present invention has the forked nozzles 3 and 3 ′. A ring-shaped ventilation member guide 4 is attached at a predetermined interval between 3 ', and the ventilation member 16 is supplied along the ventilation member guide 4 to easily interpose the ventilation member 16 at a predetermined position. Can be. Specifically, the tube-shaped ventilation member 16 is extended along the ventilation member guide 4 and is sandwiched between the waterproof sheets 12 and 13 to be joined. Since it is sandwiched between the water-impervious sheets 12 and 13, the ventilation member 16 is automatically fed out thereafter by moving the fuser 1, and is arranged at a predetermined position along the ventilation member guide 4. .
[0028]
The height of the ventilation member guide 4 is at most 20 mm at most. If the height is too high, the water impermeable sheet 12 at the joint 11 may be wrinkled, which is not preferable. By setting the lower side to about 5 mm, the ventilation member guide 4 is not obstructed.
[0029]
The shape of the ventilation member guide 4 is not limited to the above-described ring shape, and any shape may be used as long as the ventilation member 16 can be guided to the center of the joint portion 11.
[0030]
In addition, since the hot-air port position viewing member 5 is provided, when rolling is performed using the roller R or the like, the positions of the hot-air ports 3a and 3a ′ hidden by the upper water-impervious sheet 12 are known, and The molten portion can be accurately rolled, and the problem of poor joining can be prevented.
[0031]
The joining work is performed in a state where the upper water-impervious sheet 12 is sandwiched between the hot-air port position visual recognition member 5 and the nozzle portion, and the height of the hot-air port position visual recognition member 5 is approximately 7 to 30 mm. Set to By setting it in this range, it is easy to identify the position of the hot air ports 3a, 3a 'without contacting the water impermeable sheet 12. Further, by marking the locations corresponding to the hot air ports 3a, 3a 'in the hot air port position viewing member 5, the positions of the hot air ports 3a, 3a' can be easily specified.
[0032]
In addition, the base of the hot-air port position viewing member 5 may be, for example, a hinge, and the base may be rotated about the base as needed, so that the member can be moved up and down. For example, in the case where the shape of the base is changing at the boundary between the slope and the bottom, etc., and it is difficult to pass through the narrow space between the nozzles 3 and 3 ′ and the hot-air port position recognition member 5, It is possible to raise the mouth position visually recognizing member 5 once, pass through the place, return to the flat base, lower it again, and continue the fusion work.
[0033]
As described above, it is preferable that the hot-air port position visually recognizing member 5 is provided so as to be disposed on the vehicle water sheet 12 corresponding to the actual hot-air ports 3a, 3a 'in terms of visual recognition of the hot-air ports 3a, 3a'. Although it can be said that it is a form, any form may be used as long as the position of the hot air ports 3a, 3a 'can be intuitively recognized by the operator even if provided at other positions. Further, the member is not limited to a rod-shaped member, and members having various shapes such as a rectangle and a circle can be used.
[0034]
Further, a plate-shaped guide stopper 6 is provided at an end of the nozzle portion 3, and the guide stopper 6 is brought into contact with the upper water-impervious sheet 13 so that the fuser can be further moved between the water-impervious sheets. So that the joint portion 11 can be formed linearly without undulation. By bending the tip of the guide stopper 6 to the side opposite to the water-impermeable sheet 12, the guide stopper 6 does not get caught on the water-impermeable sheet 12 during the movement of the fuser 1.
[0035]
Although the guide stopper 6 is provided only in the vicinity of the end of the nozzle portion 3 in FIG. 1, it can be extended to the vicinity of the cylindrical body 2 so as to maintain the position and the orientation of the fusion device more accurately. Becomes easier.
[0036]
In the present invention, the water-blocking sheets 12 and 13 are made of asphalt-based material such as asphalt or rubber asphalt. A mixture of propylene terpolymer, butyl rubber and other rubbers and 50% or more of bituminous substances such as bron asphalt and straight asphalt. If necessary, this mixture may be mixed with, for example, a styrene-butadiene block copolymer, It is also possible to add a thermoplastic resin such as polyethylene, polypropylene and polybutadiene for reinforcement.
[0037]
When joining the ends of such a waterproof sheet made of asphalt-based material by melting them by heating, the tube body is arranged over the entire area of the joint and interposed in the joint, thereby joining the joint. It is possible to secure a ventilation path in the arranged tube body.
[0038]
In the case where the water-permeable sheets 12 and 13 made of the above-mentioned asphalt-based material are heated and melted and joined by fusion, for example, the surface to be joined is heated by a torch, hot air, or the like. The system materials are melted and superimposed. In order to melt asphalt-based materials such as asphalt and rubber asphalt, the temperature usually rises to several hundred degrees Celsius or more, and the material of the ventilation member 6 used in the present invention is melted by heating for joining the water shielding sheets 12 and 13. In order to prevent such a situation, one having a melting point of 600 ° C. or higher is used. Although there is no particular limitation on the upper limit of the melting point, a melting point up to about 2000 ° C. is usually used.
[0039]
Specific examples of the material used for the ventilation member 16 include a tube made by weaving a metal fiber made of stainless steel, zinc copper, or the like in a tubular shape, or a special material such as an aramid fiber having a high melting point even if it is a synthetic fiber. It is possible to use a fiber or a carbon fiber having a melting point of 600 ° C. or more woven in a cylindrical shape as described above, or a rope shape having an appearance as shown in FIG. it can. By using the rope-shaped ventilation member by twisting it, the pressure resistance can be further increased, so that even if pressure is applied from above the sheet, the ventilation path can be secured more reliably. In addition, a tube having a large number of holes 15 in a tube made of a metal pipe as shown in FIG. 6 can be used.
[0040]
Among them, it is highly flexible, easy to handle, and secures a sufficient ventilation path by using a tube made by weaving metal fibers into a tubular shape, twisting a carbon fiber rope, and furthermore, twisting a carbon fiber rope. This is a preferred mode in that it is possible. The tube body made of fiber has more flexibility than the tube body made of a normal metal pipe. Therefore, even if the ground is uneven and the joint portion of the impermeable sheet is bent, the ventilation member 16 has flexibility and can follow the uneven ground. For example, it is possible to prevent problems such as breakage of the ventilation member 16 and breakage of the water shielding sheets 12 and 13 due to the above. In addition, woven fibers and rope-shaped materials have a large number of holes in the gaps between the fibers. Rubber asphalt does not easily impregnate the gaps between the fibers, and does not block the holes 15 of the ventilation member 16.
[0041]
The diameter of the ventilation member 16 is preferably in the range of 3 to 10 mmφ. When the thickness is less than 3 mm, asphalt or rubber asphalt easily enters the hole 15 and becomes clogged, and it is not preferable because pressure hardly reaches the end when pressurizing. On the other hand, if it exceeds 10 mm, the step at the joint becomes large, which is not preferable.
[0042]
In the case of using a metal fiber woven in a cylindrical shape, for example, it is possible to use a fiber woven in a cylindrical shape with a diameter of about 0.2 to 0.6 mm and two to five pieces aligned. it can.
[0043]
If the hole 15 in the ventilation member 16 is too large, asphalt or rubber asphalt flows into the ventilation member 16 and clogs it. The shape of the hole 15 is not limited to a circle. For example, if the hole 15 is circular, the size of the hole is preferably set to a size equivalent to 0.1 to 3 mm.
[0044]
Next, a method for inspecting a defect of the waterproof sheet joint portion 11 is, for example, as follows. The pressurized air is sent into the air passage inside the ventilation member interposed by an air injecting machine that generates pressurized air. Then, pressurized air is sent to the whole area of the joint, and if there is a defective part with a poor joint, the air accumulates between the joined impermeable sheets 12 and 13 and swells. By doing so, a defective portion can be specified.
[0045]
【The invention's effect】
As described above, in claim 1 of the present invention, a water-permeable sheet having a large number of holes is interposed at a joint where the water-permeable sheets are overlapped, and the water-permeable sheets located on both sides of the ventilation member are heated and melted. A water-blocking sheet fusion device used for fusion bonding is characterized by comprising a forked nozzle portion connected to a hot air generator and a ventilation member guide disposed between the forked nozzles.
[0046]
The fusing operation can be advanced while the ventilation member is supplied between the forked nozzles by the ventilation member guide, so that the operation of disposing the ventilation member can be made extremely simple.
[0047]
In the second aspect, a water-sealing sheet fusion device is provided in which a hot-air-port-position visually recognizing member is disposed so that the position of the hot air port can be confirmed from the upper water-impervious sheet in a state where the nozzle portion is disposed between the upper and lower water-impermeable sheets and heated and melted. And
[0048]
The provision of the hot-air port position visualizing member allows the molten portion to be confirmed from above the impermeable sheet, so that it is possible to prevent poor joining due to a displacement of the rolling compaction location.
[0049]
In the third aspect, the water-blocking sheet is a water-blocking sheet fusing device made of an asphalt-based material. In the case of a water-blocking sheet made of asphalt, the peel strength per unit area in the bonding portion tends to be small. It is necessary to increase the area of the sheet and increase the bonding strength, so the margin of the impermeable sheet must be increased, but in such a case, the gap between the melting point and the rolling point due to the hot air occurs. Although it is easy, the effect of the waterproof sheet fuser of the present invention can be obtained more remarkably.
[0050]
In the fourth aspect, the member for visually confirming the position of the hot air port is a rod-shaped body extending from the main body of the water impermeable sheet, and disposed on the water impermeable sheet in parallel with the side forming the outer contour of the nozzle tip. It is a kimono.
[0051]
Since the position of the tip of the nozzle can be confirmed more accurately, the working efficiency can be further improved.
[0052]
In the fifth aspect, the ventilation member guide is a water-blocking sheet fuser which is a ring body attached at a predetermined interval between the forked nozzles.
[0053]
The ventilation member can be reliably guided to a predetermined position, and can be easily provided at low cost.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state where the water-shielding sheet fusion device of the present invention is joined.
FIG. 2 is a perspective view of a nozzle portion of the water-blocking sheet fuser.
FIG. 3 is a cross-sectional view of a waterproof sheet joining portion.
FIG. 4 is a plan view of a waterproof sheet joining portion in FIG. 3;
FIG. 5 is a perspective view showing an example of a ventilation member.
FIG. 6 is a perspective view showing another example of the ventilation member.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 water-blocking sheet fuser 2 cylindrical body 3 nozzle section 3 ′ nozzle section 3 a hot-air port 3 a ′ hot-air port 4 ventilation member guide 5 hot-air-portion position recognition member 6 guide stopper 11 joining section 12 upper water-blocking sheet 13 lower-side blocking Water sheet 14 Ventilation path 15 Hole 16 Ventilation member P Hot air generator

Claims (5)

A water-permeable sheet is used when a ventilation member having a large number of holes is interposed at a joining portion where the water-permeable sheets are overlapped with each other, and the water-impermeable sheets located on both sides of the ventilation member are heated and fused to be joined by fusion. A water-blocking sheet fusion splicer, comprising: a forked nozzle portion connected to a hot air generator; and a ventilation member guide disposed between the forked nozzles. 2. The water impermeable sheet fusion device according to claim 1, further comprising a hot air vent position visually recognizing member that can confirm a position of the hot air vent from the upper water impermeable sheet in a state where the nozzle portion is disposed between the upper and lower water impermeable sheets and is heated and melted. . 3. The water-blocking sheet fusing device according to claim 1, wherein the water-blocking sheet is made of an asphalt-based material. The water impermeable sheet according to any one of claims 1 to 3, wherein the hot air port position visually recognizing member is a rod-shaped body extending from the water impermeable sheet fuser and arranged on the water impermeable sheet in parallel with a side forming an outline of a nozzle tip. Fuser. 5. The waterproof sheet fusing device according to claim 1, wherein the ventilation member guide is a ring body attached at a predetermined interval between the forked nozzles.

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