JP3326494B2 - Waterproof structure of long roof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for a long roof.

[0002]

2. Description of the Related Art Folded plates are usually applied to long roofs of non-residential buildings such as factories, warehouses, schools, and shopping centers. However, in recent years, some of them have excellent waterproof performance and have no snowfall and no icicles. A sheet waterproof roof which does not generate rain noise or noise when the roof material expands has begun to be applied. The folded plate is formed by molding a painted hot-dip galvanized steel plate on the roof material. On the other hand, since the sheet waterproof roof uses a belt-like waterproof sheet made of polyvinyl chloride or the like, the cost of the roof material is about twice as high as that of the folded plate.

[0003]

SUMMARY OF THE INVENTION The present invention solves the problem that the cost of the waterproof sheet roof is high, and makes it possible to expand the application of the waterproof roof to a long roof.

[0004]

According to the waterproof structure for a long roof according to the present invention, one strip-shaped waterproof sheet made of a synthetic resin-coated metal is provided on the upper surface of a floor to be waterproofed on a roof in a required number in a width direction.
A predetermined gap is laid in parallel, and a fixed steel plate made of a synthetic resin-coated metal slightly wider than the gap is laid so that the both side edges of the fixed steel plate cross the gap and penetrate the lower part of the side edge of the belt-shaped waterproof sheet. A band-shaped connecting sheet having elasticity slightly fixed to the floor to be waterproof and having a width slightly wider than the gap is joined to the upper surface of the side end portion of the band-shaped waterproof sheet at both side edges, and the substantially central portion thereof is joined to the upper surface of the fixed steel plate. One end of the strip-shaped waterproof sheet in the longitudinal direction is fixed to a floor to be waterproofed, and the other end is connected to an expansion.

[0005] The synthetic resin-coated metal referred to in the present invention corresponds to both a metal laminated with a synthetic resin coating and a painted metal. As the synthetic resin film, a thermoplastic synthetic resin such as a polyvinyl chloride resin, a polyethylene resin, and a polypropylene resin is preferable. Examples of the belt-like connecting sheet in the present invention include thermoplastic synthetic resin sheets such as soft polyvinyl chloride and the like, and non-vulcanized rubber sheets. The bonding in the present invention includes bonding with a silicone-based, urethane-based, rubber-based adhesive, a solution-type adhesive obtained by dissolving the same synthetic resin as a synthetic resin film or a strip-shaped connecting sheet in a solvent, or hot-air welding.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on the first embodiment. FIG. 1 shows a first embodiment of the present invention.
FIG. 2 is an overall plan view showing up to an attached state of a fixed steel plate (before being fixed by a fixing tool), and FIG. 2 is an elevation view of a cross section A-A in FIG. 1. FIG. 3 is an overall plan view showing a state in which a belt-shaped waterproof sheet is laid and fixed on FIG. 1, and FIG.
It is an elevation view of B section. FIG. 5 is an overall plan view showing a state in which the roof is completed after the parts of FIG. 3 are joined together with a belt-shaped connecting sheet after the state of FIG. 3, and FIG. 6 is an elevation view of a cross section taken along line CC in FIG. FIG. 7 is a cross-sectional view showing details of the joining of the strip-shaped connecting sheet, the strip-shaped waterproof sheet, and the fixed steel plate in FIG. FIG.
FIG. 6 is a sectional view showing details of the expansion formation in FIG. 5.

In this embodiment, the size of the roof is 25
m, 7 m in the width direction. As shown in FIG. 2, a plurality of steel frames 10 each having a length of 25 m run in parallel in the length direction, and
A metal base 9 is attached at an appropriate interval in a direction perpendicular to 0, and the metal base 9 is entirely covered with a base plate 8 to form a floor 3 to be waterproof. The metal foundation 9 is also erected vertically on the steel frame 10 around the roof to form a parapet 13. In some cases, a base plate is attached inside the metal base 9. The floor 3 to be waterproofed has a water gradient of 2/100 from left to right in FIG.

The belt-shaped waterproof sheet 1 of this embodiment is a coated galvanized steel strip coated with a polyvinyl chloride resin and has a width of 9 mm.
5 pieces of 14 mm, length 24,466 mm, width 62
Two of 1 mm width and 24,466 mm length, seven in total were used. The band-shaped connecting sheet also uses a soft polyvinyl chloride resin sheet, and achieves high bonding strength by using a solution type adhesive obtained by dissolving a polyvinyl chloride resin in a solvent as an adhesive. In addition, joining by heat welding was also applied.

First, the construction method of this embodiment will be described. As shown in FIGS. 1 and 2, in the present embodiment, first, the parapet 13 around the roof and the peripheral edge of the upper surface of the floor 3 to be waterproofed on the roof connected to the parapet 13 are covered with 22 rising parts 11. The starting part 11 is fixed to the parapet 13 and the floor 3 of the roof to be waterproofed by the fixture 7. On the downstream side of the water gradient, there are three drain gutters 12 in the width direction of the roof.
And fixed to the floor 3 of the roof to be waterproofed by the fixture 7. The drain gutter role 12 has 10
A water gradient of 1/0 is provided, and a drain 14 is provided downstream of the water gradient.
Rainwater and snowmelt water on the roof can be discharged. The starting part 11 and the drain gutter 12 are formed by molding a coated galvanized steel sheet coated with the same polyvinyl chloride resin as the belt-shaped waterproof sheet 1.

In actual construction, the fixed steel plate 2 is fixed to the waterproof floor 3 before laying the belt-shaped waterproof sheet 1. FIG. 1 shows a state before the fixed steel plate 2 is fixed by a fixture. The fixed steel plate 2 of the present embodiment was a coated hot-dip galvanized steel plate coated with the same polyvinyl chloride resin as the belt-shaped waterproof sheet 1, and used as a square having a width of 130 mm and a length of 3,000 mm. The reason for shortening the length to 3,000 mm is to reduce the amount of thermal contraction of the fixed steel plate 2 in winter and the amount of displacement of the fixing tool, as described later. The fixed steel plates 2 are arranged between the seven strip-shaped waterproof sheets 1 and also between the strip-shaped waterproof sheets 1 at both ends and the rising part 11 so that a total of eight rows are provided. Each row has eight 3,000mm lengths and 326mm
And fix them on the waterproof floor 3 with fixing devices. As shown in FIG. 7, the fixed steel plate 2 straddles a gap of 110 mm between the strip-shaped waterproof sheets 1, and a position is determined in advance so that both side edges of the fixed steel sheet 2 pass under the side edge portions of the strip-shaped waterproof sheet 1 by 10 mm. Fix with.

As shown in FIG. 3 and FIG. 4, the seven strip-shaped waterproof sheets 1 are 24,466 mm long, so that they are transported to the construction site in a rolled state. At the time of construction, the right end is abutted against the drain gutter role 12 in the longitudinal direction, and in the width direction, the rolled one is laid while being deployed to the left while matching the position with the fixed steel plate as described above. Go on. The left end is in a state of being overlapped by 100 mm on the rising part 11 on the water side. After confirming that the positions in the longitudinal direction and the width direction are correct, the right end is fixed to the floor 3 to be waterproofed.

When the laying and fixing of all the seven strip-shaped waterproof sheets 1 are completed, finally, as shown in FIGS. The start-up part 11 and the drain gutter 12 and the start-up part 11 and the drain gutter 12 are joined by the belt-shaped connection sheet 4. The strip-shaped waterproof sheet 1 and the fixed steel plate are also joined by the strip-shaped connecting sheet 4. At this time, the band-shaped connecting sheet 4 is in a rolled state of 24,466.
It is desirable to carry a single mm piece to the construction site and lay it while deploying it. Incidentally, the bonding width of the strip-shaped connecting sheet 4 was 50 mm with the strip-shaped waterproof sheet 1 and 50 mm with the fixed steel plate 2, and was bonded with the solution-type adhesive 6. As shown in FIG. 7, in order not to bend the fixed steel plate when negative pressure is applied,
It is desirable that the joint with the fixed steel plate 2 be inside the fixture 7. Finally, the right end of the belt-like waterproof sheet 1 is drain drain gutter 1
2 and the left end is joined to the rising part 11 on the water side with the belt-shaped connecting sheet 4. As shown in FIG. 8, the left end has a width of 2
Using a 10 mm strip-shaped connecting sheet 4, 110 mm in the middle
Are formed and joined to form an expansion 5.

The construction method according to the present embodiment has been described above, and a countermeasure against thermal expansion according to the present embodiment will be described below. The basic idea for avoiding the thermal expansion effect is that in order to avoid the thermal expansion effect of a long strip-shaped tarpaulin, the strip-shaped tarpaulin is directly fixed to the floor to be waterproofed only at one end in the longitudinal direction. It was done. Therefore, a fixed steel plate having a short thermal expansion and a short length was fixed to the floor to be waterproofed, and both ends in the width direction of the belt-shaped waterproof sheet were connected to the fixed steel plate via a stretchable band-shaped connecting sheet. The other end in the longitudinal direction was connected to an expansion using a strip-shaped connecting sheet. Thereby, the thermal expansion in the length direction and the width direction of the belt-shaped waterproof sheet can be absorbed by the elastic band-shaped connecting sheet.
The conventional sheet waterproof roof has the elasticity of the strip-shaped waterproof sheet itself, so that it can be fixed directly to the floor to be waterproofed, no matter how long it is. I have.

The following description is based on experiments and calculations,
The conditions were based on the contents of the Building Architectural Guide and the commentary of the Architectural Institute of Japan. First, the outside air temperature was the highest in Asahikawa at 36 ° C and the lowest in -4, where the temperature difference was the largest in 100 years.
1 ° C. was used. The sunlight temperature was set to the outside air temperature + 20 ° C. Since the phenomenon of the lowest temperature at the time of construction and the highest temperature after construction is the direction in which the material buckles, and no stress is applied to the material, the phenomenon of the lowest temperature after construction at the maximum temperature during construction will be described. The size of the roof was the same as in the above example, and it was assumed that the waterproof floor was a structural body and did not expand thermally.

First, the strip-shaped waterproof sheet having a length of 24,466 mm contracts by 33 mm, so that the unbonded portion 110 mm of the expansion expands by 30%. An experiment in which the elongation of 30% was repeated 5000 times for the strip-shaped connecting sheet was performed, and it was confirmed that the strip-shaped connecting sheet did not have a decrease in tensile strength, a drop in elongation at break, and no change in thickness.

A fixed steel plate having a length of 3,000 mm is about 4 m.
As a result, the fixtures at both ends are displaced by about 2 mm. Lightweight structural steel for general structure, height 60mm, side 3
Insert a fixture into the upper side of the lip channel steel of 0 mm, lip 10 mm, and thickness 2.3 mm, assuming the thickness of the base plate so that the head comes out 25 mm, and put the head of the fixture 100,000 times with an amplitude of ± 2 mm. An oscillating experiment was performed. As a result, it was confirmed that the rocking motion of the fixture was absorbed by the lip channel steel being elastically deformed at the base of the lower side as a fulcrum. Therefore, it was also confirmed that the fixture did not undergo fatigue fracture, and that the pull-out strength of the fixture from the lip channel steel after swinging was not different from the initial strength. From this, it became clear that the length of the fixed steel plate is desirably about 3,000 mm, and that the metal base must have a cross-sectional shape capable of absorbing the thermal expansion of the fixed steel plate by elastic deformation.

Between the bonded strip-shaped connecting sheet and the strip-shaped waterproof sheet or fixed steel sheet, the strip-shaped connecting sheet undergoes an elongation of 1.1% due to the difference in linear expansion coefficient between the two. %, Which is an extremely small value, which is no problem.

[0018]

The cost reduction which is a problem to be solved by the present invention with respect to the conventional waterproof sheet roof will be described.

First, in the present invention, an inexpensive synthetic resin-coated metal is applied to the belt-shaped waterproof sheet instead of an expensive polyvinyl chloride sheet or the like whose entire surface is covered by a sheet waterproof roof. In the present invention, the application of an expensive polyvinyl chloride sheet or the like is minimized to the belt-like connecting sheet. Since the synthetic resin film on the belt-shaped waterproof sheet of the present invention is made of the same material as the belt-shaped waterproof sheet of the conventional sheet waterproof roof and the belt-shaped connecting sheet of the present invention, the bonding is performed in the same manner as the conventional sheet waterproof roof. It has been experimentally confirmed that a method using hot air welding or a method using hot air welding is possible, and that the joining strength is not inferior to that of the conventional sheet waterproof roof.

Second, in the present invention, a belt-shaped waterproof sheet, that is, a long roof material in a rolled state is applied. In the embodiment of the first aspect of the present invention, one of the lengths of 24,466 mm is used.
It is covered by one piece. As a result, the construction time was shortened by about 30% and materials such as a belt-shaped waterproof sheet were reduced. In the present invention, it is ideally desirable that the number of the belt-shaped waterproof sheets is one as in claim 1, but it may be a small number depending on the circumstances. FIG. 9 is an overall plan view showing an embodiment of the second aspect of the present invention, and FIG. 10 is an elevation view of a section D-D in FIG. 9 and 10 show the completed state of the roof, and show an example in which two belt-shaped waterproof sheets 1 are connected.

The construction method is as follows. First, the belt-like waterproof sheet 1 on the left side of the figure is attached. The left end in the longitudinal direction is placed 100 mm on the rising part 11 on the water surface,
The right end is fixed to the floor 3 to be waterproofed. Next, the belt-shaped waterproof sheet 1 on the right side of the figure is attached. The right end in the longitudinal direction is abutted against the drain gutter role 12, the left end is overlaid on the left band-shaped waterproof sheet 1 by 100 mm, and the right end is fixed to the floor 3 to be waterproofed. Laying of all seven strip-shaped tarpaulins 1,
When the fixing is completed, the joining with the belt-shaped connecting sheet 4 is performed. The right band-shaped tarpaulin 1 has a drain gutter 1 at the right end.
2, and the left end is joined with the left band-shaped waterproof sheet 1 and the band-shaped connecting sheet 4. The left end is joined with an unjoined part in the middle,
An expansion 5 is formed. The length of the unjoined portion is determined according to the length of the belt-shaped waterproof sheet 1 so that the elongation is 30% or less. The left side of the band-shaped waterproof sheet 1 is joined to the rising part 11 on the water side by the band-shaped connecting sheet 4. This portion also forms the expansion 5 in the same manner as the belt-shaped waterproof sheet 1 on the right side.

Next, the fire resistance performance of the present invention with respect to a conventional waterproof sheet roof will be described. Polyvinyl chloride is not a nonflammable material, though it does not emit flame and burn. In contrast, steel is a non-combustible material. Therefore, it can be said that the present invention, in which the entire surface of the roof is covered with the synthetic resin-coated metal, has higher fire resistance performance than a conventional sheet waterproof roof made of a belt-like waterproof sheet made of polyvinyl chloride or the like. In the roof width direction of the present invention, the entire surface is covered by a belt-shaped waterproof sheet 1 made of a synthetic resin-coated metal and a fixed steel plate 2 as shown in FIG. In the parapet portion, there is no gap because the fixed steel plate is arranged between the riser and the belt-shaped waterproof sheet. In the longitudinal direction of the roof of the present invention, as shown in FIG. 3, the rising portion 11 and the drain gutter role 12 and the drain gutter role 12 and the belt-shaped waterproof sheet 1 abut each other so that no gap is formed. As shown in FIG. 8, the band-shaped waterproof sheet 1 on the side of the expansion 5 and the rising part 11 are overlapped by 100 mm. If the match is a concern for fire protection performance, it is also possible to overlap that part.

In the present invention, a belt-like connecting sheet made of polyvinyl chloride or the like is used for joining a belt-like waterproof sheet made of a metal coated with a synthetic resin to a fixed steel plate, etc. There is no need to worry that the connection between the belt-shaped waterproof sheet and the fixed steel sheet is completely damaged.

Next, the difference between the present invention and the similar prior invention will be described. It seems to have been applied to residential roofs,
Similar to the present invention, Japanese Patent Application No. 62-183199 (hereinafter referred to as Reference 1) and Japanese Patent Application No. 63-163199 describe a non-combustible waterproof structure roof using a synthetic resin-coated metal and an elastic band-shaped connecting sheet as a roof material. 97668 (hereinafter referred to as Reference 2).

The difference between the present invention and Reference 1 will be described. First, the arrangement of the synthetic resin-coated metal waterproof sheet will be described. The present invention relates to the longitudinal direction of the roof,
Whereas a required number of strip-shaped waterproof sheets are arranged in the width direction, Reference 1 has a large number of rectangular waterproof sheets both in the longitudinal direction of the roof and in the width direction. Therefore, in Reference 1, compared with the present invention, the amount of expensive band-shaped connection sheets used is large, and the number of waterproof sheets is large, so that the construction time is long and the cost is high. In addition, the arrangement of the waterproof sheets is different, and the method of eliminating the influence of thermal expansion is also different, and the present invention solves the problem by using a band-like connecting sheet between the waterproof sheets in the longitudinal direction of the roof collectively by expansion and the width direction. On the other hand, Reference 1 does not fix more than two side edges of the band-shaped connection sheet below the four side edges of the rectangular waterproof sheet, so that in each rectangular waterproof sheet unit, both the longitudinal direction and the width direction are band-shaped connection sheets. Has been resolved. Next, fireproof measures will be described. In the third embodiment (FIG. 4 of Reference 1) applied to the flame-retardant waterproofing construction of Reference 1, the sealing material is covered with a flame-retardant strip-shaped covering sheet.
It is considered that the use of a special member for fire resistance measures increases the member cost and leads to an increase in construction time.

The difference between the present invention and Reference 2 will be described. In Reference 2, the arrangement of the synthetic resin-coated metal waterproof sheet is the same as that of Reference 1, and compared to the present invention, the amount of the expensive band-shaped connecting sheet applied is large and the construction time is long, so the cost is high. Claim 4 of Reference 2 (FIG. 13 of Reference 2) is similar to the present invention in the configuration of the waterproof sheet, the belt-like reinforcing plate, and the belt-like connecting sheet. However, in Reference 2, there is a gap between the waterproof sheet and the belt-like reinforcing plate, which is an important difference from the present invention. It is considered that the fire resistance is inferior to that of the present invention in which the entire surface of the roof is covered with a synthetic resin-coated metal which is a non-combustible material. Therefore, in Reference 2, as in Reference 1, a non-combustible covering sheet, which is a special member, is applied.

As described above, the present invention has solved the problem that the cost of the sheet waterproof roof is high, and has made it possible to expand the application of the waterproof roof to a long roof. In addition, the present invention, in which the entire surface of the roof is covered with a synthetic resin-coated metal, has higher fire resistance than a sheet waterproof roof made of a belt-like waterproof sheet made of polyvinyl chloride or the like. Further, since the synthetic resin-coated metal has less thermal expansion than polyvinyl chloride or the like, wrinkles are less generated in summer and the appearance is good.

It is also considered to be applied to the roof of a house.
Compared with the prior art of a waterproof structure roof using a synthetic resin-coated metal and elastic band-shaped connecting sheet for the roofing material as in the present invention, the amount of expensive band-shaped connecting sheet used is small,
In addition, the number of waterproof sheets is small and the construction time is short, so that the cost is low.

[Brief description of the drawings]

FIG. 1 is an overall plan view showing up to a mounting state of a starting part, a drain gutter, and a fixed steel plate in the first embodiment of the present invention.

FIG. 2 is an elevational view of a section A-A in FIG. 1;

FIG. 3 is an overall plan view showing a state in which a belt-shaped waterproof sheet is laid and fixed on FIG.

FIG. 4 is an elevation view of a section B-B in FIG. 3;

FIG. 5 is an overall plan view showing a state in which the roof is completed after joining the various parts with a belt-like connecting sheet after the state of FIG. 3;

FIG. 6 is an elevation view of a cross section taken along the line CC of FIG. 5;

FIG. 7 is a cross-sectional view showing details of joining of the belt-shaped connecting sheet, the belt-shaped waterproof sheet, and the fixed steel plate in FIG.

FIG. 8 is a cross-sectional view showing details of expansion formation in FIG.

FIG. 9 is an overall plan view showing a second embodiment of the present invention.

FIG. 10 is an elevation view of a section D-D of FIG. 9;

[Description of Signs] 1 strip-shaped waterproof sheet 2 fixed steel plate 3 floor to be waterproofed 4 strip-shaped connecting sheet 5 expansion 6 solution type adhesive 7 fixing tool 8 field plate 9 metal base 10 steel frame 11 start-up part 12 drain gutter 13 Parapet 14 Drainage outlet

Continuation of the front page (56) References JP-A-59-187946 (JP, A) JP-A-57-104758 (JP, A) JP-A-7-62804 (JP, A) JP-A-1-86616 (JP) , U) Japanese Utility Model No. 2-18827 (JP, U) Japanese Utility Model Application No. 1-46322 (JP, U) Japanese Utility Model Utility Model 55-162629 (JP, U) Japanese Utility Model Utility Model Utility Model 51-86622 (JP, U) Japanese Patent Application No. Sho 50-8253 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04D 5/04 E04B 1/94 E04D 5/14

Claims (2)

(57) [Claims] 1. A band-shaped waterproof sheet made of a synthetic resin-coated metal is laid in parallel with a predetermined number of predetermined gaps in the width direction on the upper surface of a floor to be waterproofed on a roof, and is slightly wider than the gap. A fixed steel plate made of a synthetic resin-coated metal having a wide width is fixed to the floor to be waterproofed so that both side edges of the fixed steel plate straddle the lower portion of the side edge of the belt-shaped waterproof sheet across the gap, and are slightly wider than the gap. An elastic band-shaped connecting sheet, both side edges of which are joined to the upper surface of the side end portion of the band-shaped waterproof sheet, and a substantially central portion thereof are joined to the upper surface of the fixed steel plate, and one end in the longitudinal direction of the band-shaped waterproof sheet should be waterproof. A waterproof structure with a long roof, fixed to the floor and the other end connected to an expansion. 2. A small number of belt-like waterproof sheets are connected in the longitudinal direction of the roof, and one end of each of the belt-like waterproof sheets is fixed to a floor to be waterproofed and the other end is connected to an expansion. The waterproof structure for a long roof according to claim 1.