JP5665216B2 - Tarpaulin joining structure - Google Patents

Description

The present invention relates to a waterproof sheet joining structure laid on a base, which is formed by overlapping adjacent waterproof sheets and joining them together to eliminate a level difference at the joined part and to join a substantially flat level-resolving waterproof sheet. Concerning structure.

In general, when a waterproof layer is formed by laying a waterproof sheet on a roof such as a building, a condominium, or a detached house, such as a roof, a veranda, or a balcony, it is necessary to use a plurality of waterproof sheets. In this case, in order to prevent water leakage at the joints between adjacent waterproof sheets, the specifications for overlapping the adjacent sheets with a width of 40 mm or more are defined. This stacking allowance is a specification established by the public building construction standard specification (building work) 2007 edition (supervised by the Ministry of Land, Infrastructure, Transport and Tourism, Minister's Secretariat, Department of Maintenance). Since it is not possible to make the following substantially, there is a case where a step at the overlap margin becomes a problem. That is, there is a problem that the flow of rainwater is hindered by the level difference at the overlap allowance, and water accumulates in the overlapped portion. Furthermore, in the case of a house veranda, a building intended for walking or the rooftop of a house, a walking board such as a resin panel may be further laid on the waterproof sheet, and the walking is caused by the step of the overlap allowance. There was a problem that the board could not be laid flat and would rattle.

In addition, a structure is also used in which the waterproof sheet is abutted without being overlapped as described above and the joint sheet is joined to the abutting portion to waterproof the joint. There was a step in minutes.

  Therefore, as a method for joining a plurality of waterproof sheets without steps without overlapping the waterproof sheets, a method using a waterproof sheet having an inclined end portion of the waterproof sheet has been proposed. (Patent Document 1). In this case, since the end surfaces are constant slopes, a plurality of waterproof sheets can be joined by matching the end surfaces. However, with this method, it is necessary to make the end face of the waterproof sheet into a slant surface, and furthermore, it is not possible to cope with the movement of the groundwork only by joining the end faces, and the waterproofness cannot be ensured by peeling off part of the joined part. There was a problem.

Further, in the structure using the above-described expansion sheet, a digging portion is provided on the base side of the contact portion of the adjacent waterproof sheet, the expansion sheet is accommodated in the digging portion, and the waterproof sheet is placed above the expansion sheet. The structure which makes an adjacent waterproof sheet substantially flat by providing a contact part is proposed (patent document 2).

However, in the above case, it is necessary to lay an extension sheet in addition to the adjacent waterproof sheet. For this reason, it is necessary to cut the extension sheet into a predetermined width and length at the construction site, or to manufacture a sheet that has been cut in advance, and to bond this to the dug portion with an adhesive. Thereby, there existed a problem of the work efficiency fall by the increase of the man-hour concerning cutting of an extension sheet | seat and adhesion | attachment, and the increase in construction time.
In addition, since the extension sheet is bonded to two adjacent waterproof sheets, the above-mentioned public building construction standard specifications require an overlap allowance of 40 mm or more for each waterproof sheet. As a result, the extension sheet The width needs to be 80 mm or more. For this reason, there is a problem in aesthetics because the joint becomes large and visually conspicuous.

Japanese Patent Application Laid-Open No. 07-247642 JP 2008-196192 A

The present invention has been made to solve the above problems, and in the case of laying and fixing a plurality of waterproof sheets on the base, even if the adjacent waterproof sheets are overlapped and joined, the overlapping portion is substantially This is to provide a waterproof flat sheet joining structure that has no level difference and can secure sufficient waterproofness, shorten the construction time, and realize a joining structure with excellent aesthetics. It is to be.

That is, the present invention has solved the above problems, the 請 Motomeko 1, a bonding structure for a waterproof sheet laid fixing a plurality of waterproof sheets on the base, are formed on the base, the The bottom part is formed by a member that can be inserted and removed up and down, and the edge part of one waterproof sheet is accommodated in the recessed part, and the edge part of another waterproof sheet adjacent to the recessed part is overlapped and joined. A waterproof sheet bonding structure that eliminates a level difference in the overlapping portion, characterized in that it has a superimposed portion.
The waterproof sheet bonding according to claim 2 , wherein the depth of the recess is substantially the same as the thickness of the edge of the one waterproof sheet. Construction.
In Claim 3 , The bottom part of the said recessed part is formed of the member which has a thermoplastic resin coating layer in the joint surface with the edge part of said one waterproof sheet, The any one of Claims 1-2 characterized by the above-mentioned. A waterproof sheet bonding structure that eliminates the level difference in the overlapped portion.
According to a fourth aspect of the present invention , a recess is formed on the base by a member whose bottom is detachable up and down, and an edge of one waterproof sheet is accommodated in the recess, and the bottom is formed on the bottom of the recess. A waterproof sheet joining method in which the edge of the waterproof sheet is joined, and the edge of the other waterproof sheet adjacent to it is overlapped and joined to eliminate the step of the overlapping part of the adjacent waterproof sheet.

In the present invention, even if adjacent waterproof sheets are overlapped and joined to form an overlapped portion, a recess (hereinafter referred to as an edge storing recess) is provided on the base and the end of one waterproof sheet is provided there. By storing the portion and overlappingly joining the edge portions of the other waterproof sheets thereon, a substantially flat joining structure can be obtained without substantially producing a step in the overlapping portion. Thereby, after waterproofing is ensured by overlapping the waterproof sheets, the rainwater can be reliably drained without forming a retention portion.

In the present invention, in order to overlap and join adjacent waterproof sheets in the overlapping portion, the joining structure does not require an extension sheet. For this reason, when using an extension sheet, in order to join the adjacent waterproof sheet and the extension sheet, it is necessary to join the sheet twice with one joining structure. In order to overlap and bond the waterproof sheets to be bonded, one bonding is sufficient. Therefore, in this invention, since the frequency | count of joining of a waterproof sheet can be reduced, reduction of a man-hour and shortening of construction time can be aimed at.

  Furthermore, in the public building construction standard specification, it is specified that the overlap allowance is 40 mm or more per place, and the overlap allowance is 1 place in the present invention as described above. May be 40 mm or more. On the other hand, when using an extension sheet, since there are two joining locations as described above, it is necessary that the overlap allowance is 80 mm or more for two locations. Therefore, in this invention, compared with the joining method which uses an extension sheet | seat, an overlapping part can be made small and it is hard to be conspicuous, it is excellent in aesthetics, and drainage of rain water becomes possible more reliably.

It is sectional drawing which shows the recessed part for edge storage which concerns on this invention. It is sectional drawing which shows the junction structure which concerns on this invention. It is sectional drawing which shows Embodiment 1 which concerns on this invention. It is sectional drawing which shows the form which forms the bottom part of the edge storage recessed part which concerns on this invention with a some member. It is sectional drawing which shows Embodiment 2 which concerns on this invention. It is sectional drawing which shows Embodiment 3 which concerns on this invention. It is a top view which shows embodiment of this invention. It is sectional drawing which shows a prior art. (9a) It is sectional drawing which shows the steel plate which can be fitted and detached, and its lamination | stacking state which forms the bottom part of the recessed part for edge storage. (9b) It is a perspective view of a detachable steel plate forming the bottom of the edge storing recess. It is sectional drawing of the form of the steel plate which forms the bottom part of the edge storage recessed part which concerns on this invention. It is sectional drawing which shows embodiment of this invention. It is sectional drawing which shows Embodiment 4 which concerns on this invention.

A waterproof sheet bonding structure according to an embodiment of the present invention will be described below with reference to the drawings. The present invention is not limited to the following embodiments.

  The edge storage part in the joining structure of the waterproof sheet of this invention was shown in FIG. 1, and the joining structure of this invention was shown in FIG. The edge storing recess 4 is formed on the base 1 by the member 2. If the depth of the side surface part 4-2 of the edge storing recess 4 is substantially the same as the thickness of the end edge 5-1 of the waterproof sheet 3-1 stored in the edge storing recess 4, The level difference of the overlapping portion 6 can be easily eliminated.

  In the joining structure of the present invention, the end edge portion 5-1 of the waterproof sheet 3-1 which is the lower side in the overlapping portion 6 is accommodated in the edge storing recess 4, and the adjacent waterproof sheet 3-2 is placed thereon. It is formed by overlapping and joining the edge portions 5-2.

  The member 2 forming the edge storing recess 4 may be a single member or may be composed of a plurality of members. Furthermore, as the member 2, an inorganic board, a synthetic resin board, a heat insulating board, a wooden board, a metal plate, or the like can be selected as appropriate. When the edge storing recess 4 is formed by the single member 2, it is possible to cut the inorganic board or the like, or to mold a synthetic resin board or a heat insulating board using a profile extruder. . However, since the method for forming the edge storing recess 4 from a single member requires the special processing as described above, it is possible to form the edge storing recess 4 using a plurality of members 2 having different thicknesses. preferable.

  As described above, the waterproof sheet joining structure according to the present invention as shown in FIG. 2 is obtained by joining the adjacent waterproof sheets 3-1 and 3-2 in a watertight manner by the overlapping portion 6, and then storing the edge portion. By fitting the edge portion 5-1 of the lower waterproof sheet 3-1 into the concave portion 4 for use, the edge portion 5-2 of the waterproof sheet 3-2 is overlaid and fixed on the edge portion 5-1. Moreover, since it becomes substantially flat which produces a substantial level | step difference in the superimposition part 6, rain water can be drained, without staying.

  Here, FIG. 3 shows a preferred embodiment 1 in which the edge storing recess 4 is formed using a plurality of the members 2 described above. According to this, the inorganic board 2A was laid on the base 1, and the edge storing recess 4 was formed. The edge storing recess 4 is composed of inorganic boards 2A-1 and 2A-2 and an inorganic board 2A-3 that is thinner than the inorganic board, and the inorganic board 2A-1 is attached to both ends of the inorganic board 2A-3. It is comprised by arranging inorganic board 2A-2. As a result, the edge storing recess 4 having a depth substantially the same as the thickness of the edge 5-1 of the waterproof sheet 3-1 is formed.

  Further, waterproof sheets 3-1 and 3-2 are laid on the inorganic board 2 </ b> A, and the waterproof sheet 3-1 arranged on the lower side of the overlapping portion 6 is disposed in the edge storing recess 4. The edge portion 5-1 of the waterproof sheet 3-2 adjacent to the edge portion 5-1 is placed on the edge portion 5-1, and the edge portion 5-2 of the waterproof sheet 3-2 adjacent to the edge portion 5-1.

  As a method for joining the edge portion 5-1 and the edge portion 5-2, bonding using an adhesive, bonding using a solvent, bonding using a hot air welder, or the like can be used. In the form of FIG. 3, a liquid sealer (not shown) is used so that the edge portion is joined using a hot-air welder and the joint portion between the edge portion 5-2 and the waterproof sheet 3-1 is put on both. Terminal processing.

  The method for fixing the inorganic board to the base is not particularly limited, but in FIG. 3, the fixing disk 7 is disposed on the inorganic board 2 </ b> A and fixed to the base with screws 8 from above. Considering the fixing stability of the inorganic board 2A laid on the ground, it is desirable to fix one or more of the inorganic boards 2A-1, 2A-2, 2A-3.

As a method of fixing the waterproof sheet 3 on the inorganic board 2A, in FIG. 3, an adhesive (not shown) is applied to the inorganic boards 2A-1 and 2A-2, and the waterproof sheets 3-1 and 3-2 are applied. Are fixed. Moreover, joining of the edge part 5-1 of the waterproof sheet 3-1 to the inorganic board 2A-3 which forms the bottom part 4-1 of the edge part accommodating recessed part 4 is also joined using the adhesive agent.
As a method of fixing the waterproof sheet 3 on the inorganic board 2A as described above, there is a mechanical fixing method of fixing a fixing disk with screws in addition to a fixing method using an adhesive.

When the waterproof sheet 3 is fixed by a mechanical fixing method, a resin-coated fixing metal disk 7A (not shown) in which the surface of the metal plate is covered with the resin layer 9 is disposed on the inorganic board 2A, and from above The inorganic boards 2A-1 and 2A-2 are fixed to the base 1 with screws, and the waterproof sheet 3-1 and 3-2 are bonded to the resin layer 9 of the resin-coated fixing metal disk 7A on the hot air welding machine, solvent, It can be welded and joined by induction heating. In this case, a strip-shaped resin-coated steel plate can be used.

  Further, the inorganic board 2A-3 constituting the bottom part 4-1 of the edge storing recess 4 is arranged with a resin-coated fixing metal disk 7A on the inorganic board 2A-3 in the same manner as other parts. The inorganic board 2A-3 is fixed to the base 1 with screws from above, and the edge portion 5-1 of the waterproof sheet 3-1 disposed at the lower portion in the overlapping portion 6 is fixed to this edge storing recess 4 with resin coating. The resin layer 9 of the metal disk 7A can be welded and joined by a hot air welder, a solvent or induction heating. In this case, a strip-shaped resin-coated steel plate can also be used.

  Here, the bottom part 4-1 of the edge storing recess 4 is not limited to the inorganic board 2 </ b> A- 3 as shown in FIG. 3, and a metal plate, a wooden board, a resin board, or the like can be used. In the case of fixing with a screw, the screw portion of the screw 8 is fixed by biting into a member constituting the bottom portion 4-1, in consideration of reduction of man-hours for fixing the bottom portion 4-1, and shortening of construction time. What is necessary is just to have the hardness of a grade. Further, the bottom portion 4-1 may be formed of a plurality of members of the same type or different types.

Especially, it is preferable to make the outermost surface layer of the bottom part 4-1 of the recessed part 4 for edge storage into a thermoplastic resin coating layer, and in this case, the edge part 5 of the waterproof sheet 3-1 is formed on the bottom part 4-1. -1 is preferably joined by welding using a hot-air welder. By using a hot air welder in this way, the edge portion 5-1 can be crimped and welded along the side surface 4-2 and the bottom surface 4-1 of the recess for storing the edge edge while making the edge portion 5-1 flexible with hot air. It becomes possible, and it can be accommodated in the edge storing recess 4 in a state where the edge 5-1 is in close contact. Thereby, when the edge portion 5-2 of the other waterproof sheet 3-2 is overlapped with the edge portion 5-1, the overlapping portion 6 can be easily finished in a flat state without a step. it can.

When the member constituting the bottom portion 4-1 is fixed to the base 1 using the screw 8, the screw 8 bites into the member constituting the bottom portion 4-1 when the screw 8 is driven. The top surface may sink. Further, when the screw is strongly driven into the ground, the sinking of the upper surface of the member constituting the bottom portion 4-1 becomes large. In such a case, the strength of driving the screw can be adjusted to be constant. Desired.
In this way, when the member constituting the bottom portion 4-1 is likely to sink, the unevenness due to the sinking, and when the plurality of screws 8 are driven, the degree of the sinking may not be constant. (Because the driving strength of the screw 8 may not be constant), the unevenness is reflected on the waterproof sheet laid on the screw 8 and the problem that the unevenness is conspicuous is likely to occur. Therefore, it is preferable that the bottom portion 4-1 is formed of a member that is difficult to sink even by compression.

Specifically, the bottom 4-1 is preferably a member in which a screw 8 is driven by an impact driver or the like, and a sinking amount of the upper surface of the member is 5 mm or less, more preferably 3 mm or less. As such a member, in the following compression test, the stress when compressed by 1 mm is preferably 20 N or more, and more preferably 35 N or more. Specifically, a metal plate, a resin plate, an inorganic board, and a wood board are preferable. Thereby, since the sinking of the bottom part 4-1 is not conspicuous by the driving of the screw 8, the unevenness does not appear on the waterproof sheet, the degree of the sinking of the bottom part 4-1 becomes constant, and the overlapping part is It can be made flatter.

<Compression test>
A jig for a compression test was attached to the tensile tester so that a cylindrical head portion having a diameter of 6.2 mm compressed the test piece, and the stress (N) when the test piece was compressed by 1 mm was measured.
Test speed: 10 mm / min

  Further, when the member constituting the bottom portion 4-1 is composed of a plurality of members, only the uppermost member can use the above-mentioned rigid metal plate, resin plate, or wood board. .

  When the members constituting the bottom portion 4-1 are composed of a plurality of (three) members 10 as shown in FIG. 4, the respective component members 10-1, 10-2, 10-3 are fitted. It is preferable to dispose it. Thereby, it is preferable because the depth of the edge storing concave portion 4 can be easily changed by changing the number of the plurality of members 10 constituting the bottom portion 4-1.

Furthermore, as for the member 10 which comprises the said bottom part 4-1, it is preferable to make the outermost surface of the uppermost member (10-1) into a thermoplastic resin coating layer. Thereby, since adhesion with the waterproof sheet 3-1 can be performed using a hot-air welder, the edge portion 5-1 can be stored in close contact with the edge storage recess 4 as described above, It becomes easier to obtain the flatness of the overlapping portion 6.
The above effect may be achieved by making the uppermost member joined to the waterproof sheet out of the members constituting the bottom part 4-1 a member having a thermoplastic resin coating layer. From the standpoint of reducing the number of steps, a member having a resin coating layer may be used other than the uppermost part.

As a member having such a thermoplastic resin coating layer, a metal plate having a resin coating layer can be exemplified, and it is preferable that the waterproof sheet and the thermoplastic resin layer are made of the same kind of resin in terms of increasing the bonding strength. Here, the same kind of resin does not need to be the same resin. For example, when the waterproof sheet is a soft polyvinyl chloride sheet, it is preferable that the thermoplastic resin coating layer is also made of polyvinyl chloride, but it is necessary to make the composition of both the plasticizers the same. Absent. As another example, when the waterproof sheet is a polyolefin-based elastomer, a polyolefin-based elastomer having a density different from that of the thermoplastic resin coating layer can be used. As yet another example, if the waterproof sheet is an acrylic resin, the thermoplastic resin coating layer can use an acrylic resin having a different composition ratio of the acrylic monomer.
That is, the same kind here is the same kind in the sense that sufficient joint strength can be obtained by joining by hot air welding, and uses a combination in which these are hot air welded and the specimen breaks in the peel test. It is preferable to do.
Moreover, even if the thermoplastic resin coating layer of the waterproof sheet is made of different materials, it is sufficient if it can be joined in a watertight manner by hot air welding.

The member that can be fitted and removed up and down that constitutes the bottom part 4-1 may be any material that can be fitted and removed by stacking up and down. A form that can be freely formed is preferable, and a form in which a plurality of members of the same type can be stacked vertically and fitted and removed by molding a steel plate as illustrated in FIG. 9 can be exemplified. 9 is formed with a bent portion 20 in which both end edges in the longitudinal direction of the substantially rectangular plate-shaped main body 19 form a generally square shape in cross section. A through hole 17 for a screw is provided on the flat surface. In this way, since the lower surface side is wider than the upper surface side and is substantially C-shaped in cross-sectional view, it can be stacked so that it can be fitted and removed vertically, and the through holes 17 Can also be freely fitted and detached, and displacement of the stacked steel plates 101 can be prevented. Further, by driving the screw 8 into the through hole 17, the stable bottom portion 4-1 can be formed in which the fitted state is maintained and there is no displacement.
In the case of such a form, the member 101 is preferable because it can be fitted up and down and can be stored compactly during transportation and storage. The steel plate 101 has a thermoplastic resin coating layer 18.

  A preferred embodiment 2 is shown in FIG. A heat insulating board 11 is laid on the base 1 and an inorganic board 2A is laid thereon, and the side surface part 4-2 of the edge storing recess 4 is formed of the inorganic boards 2A-1 and 2A-2. ing. The bottom surface portion 4-1 is configured by laminating three steel plates 10 </ b> A having the thermoplastic resin coating layer 18, and the sheet thickness of the sheet edge portion 5-1 of the lower waterproof sheet 3-1 of the overlapping portion 6. And an edge storing recess 4 having substantially the same depth.

  The inorganic board 2A was fixed by setting a metal fixing disk 7 on the inorganic board 2A, driving a screw 8 into the base 1, and fixing it together with the heat insulating board 11. In addition, the screws 8 were driven into the base 1 from the three steel plates 10 </ b> A constituting the bottom surface portion 4-1 of the edge portion storing recess 4, and fixed together with the heat insulating board 11.

  And the waterproof sheet 3-1 located under the superposition part 6 was laid and crimped | bonded to the inorganic board 2A-1 which apply | coated the adhesive agent, and the waterproof sheet 3-1 was joined and fixed. Then, the edge part 5-1 was stored in the said edge part accommodating recessed part 4 using the hot air welding machine, and it fixed by joining. Next, the adjacent waterproof sheet 3-2 was similarly laid and fixed on the inorganic board 2A-2 coated with an adhesive. And the edge part 5-2 of the waterproof sheet 3-2 is piled up on the edge part 5-1 of the waterproof sheet 3-1, and the edge part 5-1 and the edge part 5-2 are used using a hot air welding machine. Were joined in a watertight manner. And the terminal process was performed with the liquid sealer (not shown) so that the junction part of the said edge part 5-2 and the waterproof sheet 3-1 might be applied to both.

Such an embodiment is preferable because it is possible to obtain a waterproof layer that can be walked by laying an inorganic board after obtaining a heat insulating effect.

  A preferred embodiment 3 is shown in FIG. According to this, the inclination layer 12 is provided using the heat insulation board 11-1 which has the gradient in the foundation | substrate 1, and it uses the inorganic board 2A-1 and 2A-2, and the steel plate 10A for the edge similarly to FIG. Forming the recessed portion 4 for storing the portion, and storing the edge portion 5-1 of the waterproof sheet 3-1 laid on the lower side of the slope, that is, the lower side, in the recessed portion 4 for storing the edge portion, The end edge portion 5-2 of 3-2 is overlapped and joined. Thus, when providing an inclined layer, it is preferable to lay the waterproof sheet 3-1 on the lower side of the overlapping portion 6 on the water side in consideration of the flow direction of rainwater. Thereby, the safety | security of waterproofing can be improved more. And the terminal process was performed with the liquid sealer (not shown) so that the junction part of the said edge part 5-2 and the waterproof sheet 3-1 might be applied to both.

  That is, even when draining rainwater with a gradient, according to the joining structure of the present invention, the waterproof sheet is substantially flat at the overlapping portion 6, so that the rainwater is drained at this portion without stagnation. In FIG. 6, the gradient is greatly illustrated for convenience of explanation, but the gradient was 1/90 in actual construction. Furthermore, although the inclined layer 12 may be composed of a member other than the heat insulating board, it is preferable to form the inclined layer 12 with the heat insulating board because a member having a certain gradient can be easily manufactured.

  Moreover, the top view of embodiment at the time of constructing with the joining structure of FIG. 6 was shown in FIG. Thereby, in the embodiment of the present invention, the overlap margin of the waterproof sheet is 50 mm, but in the conventional technology in which the expansion sheet 16 is essential as shown in FIG. 80 mm. This is because, as described above, the overlap allowance is 40 mm or more according to the public building construction standard specification, and generally it is necessary to set it to 100 mm or more in order to ensure water-tightness safely. Therefore, in the embodiment of the present invention, the overlap margin is narrow and excellent in aesthetics, and the retention of rainwater is less likely to occur.

  According to the prior art of FIG. 8, it is necessary to form a digging portion having the thickness of the expansion sheet 16 on the base, and to join the expansion sheet 16 to the digging portion. Therefore, at the time of construction, it is necessary to cut the expansion sheet 16 in accordance with the dug portion at the construction site, or to manufacture this separately in a factory or the like. Furthermore, after joining with the adhesive etc. to a dug part, two adjacent waterproof sheets 3 are joined to the expansion sheet 16. FIG. Thus, in the prior art of FIG. 8, it is necessary to join the waterproof sheet including the expansion sheet three times. On the other hand, according to the joining structure of the present invention, the waterproof sheet is joined to the bottom 4-1 of the edge storing recess 4 of the edge 5-1 and to the edge 5-1 and the edge. It is two times of joining with 5-2, and man-hour reduction and shortening of construction time can be aimed at.

  As another embodiment, as shown in FIG. 10, a member 21-1 in which a steel plate is formed into a substantially U shape may be used as a member for forming the bottom 4-1 of the edge storing recess 4. I can do it. Moreover, 21-2 which provided the suppressing part 22 in the opening part side of the member 21-1, and the member 21-3 of the form which the lower part is wider than an upper side can also be used for the bending part 20 in a square shape. Further, it is preferable that the member 21-1 is formed with a screw through hole 17 in the upper end surface, and the member 21-2 and the member 22-3 are formed in the holding portion. Moreover, it has the thermoplastic resin coating layer 18 on the upper surface of 21-1 to 21-3.

  An embodiment using this member 21-2 is shown in FIG. According to this, the heat insulating board 11 is laid on the base, the member 22-2 is placed thereon, the screw hole 17 is fixed to the base together with the heat insulating board with screws 8, and the inorganic board 2A is attached to both ends of the member 21-2. -1 and 2A-2 were laid and fixed with a fixing disk 7 (not shown) and a screw 8 to form an edge storing recess 4. The waterproof sheet 3-1 is bonded to the inorganic board 2A-1 with an adhesive, and the edge portion 5-1 is melt-bonded to the thermoplastic resin coating layer 18 of the member 21-2 with a hot air welding machine. Placed in the recessed portion 4 for storage, the waterproof sheet 3-2 is bonded to the inorganic board 2A-2 with an adhesive, the edge 5-2 is overlapped with the edge 5-1 and watertightly bonded with a hot air welder did.

  In addition, when a member that easily sinks against compression, such as a heat insulating board, is laid on the base, the edge storing recess 4 is formed, and the bottom 4-1 is fixed to the base with the screw 8, a heat insulating board or the like In some cases, the bottom portion 4-1 is likely to sink. In particular, when the bottom part 4-1 is made of a hard member such as a metal plate, an inorganic board, a wooden board, etc. and has an uneven surface, and the bottom part 4-1 is installed on a heat insulation board, the bottom part 4-1 sinks into the heat insulation board or the like. It becomes easy to put. In such a case, sinking of the heat insulation board or the like can be prevented by laying a flat intermediate material on the heat insulation board or the like and installing the member having the unevenness thereon.

As an intermediate material for preventing the sinking of such a heat insulating board, any material that is flat and strong against compression can be used. This is preferable because it is sufficiently held and fixed. Specifically, in the compression test, the stress when compressed by 1 mm is preferably 5N to 100N, and more preferably 10N to 80N.
As the intermediate material, a resin sheet, a foam sheet, a plastic cardboard, a paper cardboard, or the like can be used.

  As such an embodiment, as shown in FIG. 5 and FIG. 6, the heat insulating boards 11 and 11-1 are laid on the ground, and the intermediate material is laid thereon, and the member having the unevenness on the lower surface is laid in order from the bottom and fixed with screws. By doing, the form which forms the bottom part 4-1 of the recessed part 4 for edge part accommodating can be illustrated.

  A more specific preferred embodiment 4 is shown in FIG. According to this, the inclination layer 12 is provided using the heat insulation board 11-1 which has a gradient in the foundation | substrate 1, and the intermediate material 23 on the heat insulation board 11-1 and inorganic board 2A-1, 2A-2 on the both sides. The edge of the waterproof sheet 3-1 is laid and formed on the intermediate member 23 using the steel plate 101 that is freely detachable to form the edge storage recess 4 and is laid on the lower side of the slope, that is, on the lower side. The part 5-1 is accommodated in the recessed part 4 for storing the edge part, and the edge part 5-2 of the waterproof sheet 3-2 on the water side is overlapped and joined. And the terminal process was performed with the liquid sealer (not shown) so that the junction part of the said edge part 5-2 and the waterproof sheet 3-1 might be applied to both.

  Here, in the case where the member forming the bottom portion 4-1 has a thermoplastic resin coating layer such as a resin-coated metal steel plate, and the thermoplastic resin coating layer is arranged so as to be in contact with the heat insulating board, The low molecular weight component of the plastic resin coating layer may move to the heat insulating material and the heat insulating material may be dissolved. Specifically, when the thermoplastic resin coating layer is a soft polychlorinated building resin layer containing a plasticizer, the plasticizer component may be transferred to the heat insulating board. In such a case, the transition of the plasticizer can be prevented by providing an isolation layer between the heat insulating board and the resin-coated metal steel plate.

  For the isolation layer, a metal plate, a wood plate, a resin plate, and a resin sheet can be appropriately selected according to the migration component. When the migration component as described above is a plasticizer, a metal plate, a metal thin film, a polyolefin resin sheet, or the like is preferably used. From the ease of processing at the construction site, a polyolefin resin sheet is more suitable. Preferably used. Further, when the bottom portion 4-1 of the edge storing recess 4 is fixed with a screw, as described above, the bottom portion 4-1 may be distorted by biting in when the screw is driven. In that case, the olefin resin sheet preferably has a stress of 20 N or more, more preferably 35 N or more when compressed by 1 mm in a compression test.

As the waterproof sheet used in the present invention, a vinyl chloride waterproof sheet, an olefin waterproof sheet, an acrylic waterproof sheet, a rubber waterproof sheet and the like can be used. A vinyl chloride waterproof sheet is preferable from the viewpoints of workability, weldability between sheets, and adhesion to the waterproof sheet fixing bracket. Furthermore, according to the joint structure according to the present invention, the waterproof sheet preferably has flexibility in order to accommodate the end edge part 5-1 of the waterproof sheet 3-1 in the edge part storing recess 4, from this point. It is preferable to use a vinyl chloride waterproof sheet.
As the thickness of the waterproof sheet, a sheet having a thickness of 0.5 to 5.0 mm can be used, and 1.0 to 2.5 mm is preferable in consideration of the safety of waterproof performance and the ability to fit into the edge storing recess 4. . That is, if the thickness is thick, watertightness is maintained even with the aging of the waterproof sheet, and the safety of the waterproof performance is increased. However, the waterproof sheet is in close contact with the bottom surface portion 4-1 and the side surface portion 4-2 of the recess 4 for storing the edge portion. It is more preferable to use the above-mentioned range from the viewpoint that both the safety of the waterproof performance and the ability to fit into the edge storing recess 4 are compatible.

The waterproof sheet of the present invention can be used in a single layer or multiple layers. Moreover, in the case of a multilayer, a base material can also be laminated | stacked. As the base material, natural fibers such as cotton and hemp, synthetic fibers such as polyester, polyethylene and acrylic, and woven or non-woven fabrics of glass fibers can be used. Among these, polyester nonwoven fabrics, glass nonwoven fabrics, and glass woven fabrics are preferable from the viewpoint of dimensional stability and processability.

When the waterproof sheet is a multilayer, each layer may be composed of layers having different compositions, or may be composed of the same composition. Moreover, the said base material can be laminated | stacked between each layer, even if laminated | stacked on the lowest layer.
When joining the waterproof sheets, it is preferable that the uppermost layer and the lowermost layer are composed of a thermoplastic resin layer from the viewpoint that solvent welding and hot air welding can be performed. For example, in the case of a vinyl chloride waterproof sheet, a laminate in which the uppermost layer and the lowermost layer are made of polyvinyl chloride resin and the base material is laminated between them can be suitably used.

  The substrate can be used without any particular limitation, but is applied to the roof of buildings such as buildings, condominiums, and detached houses, concrete substrates such as roofs, verandas, and terraces, lightweight foamed concrete substrates, metal substrates, and wooden substrates.

  Examples of inorganic boards include gypsum board, cement board, calcium silicate board, resin reinforced board, etc., but resin reinforced board made by solidifying and strengthening inorganic material with thermosetting resin for less warpage and excellent dimensional stability. Is more preferable.

  As the heat insulating board used in the present invention, heat insulating materials such as polystyrene foam, rigid urethane foam, phenol foam and the like can be used, and in consideration of strength, a heat insulating material in which kraft paper or aluminum foil is laminated on both sides is preferable. The thickness of the heat insulating material includes 20, 25, 50, 75, 100 mm, etc., and is set according to each specification. For the vertical and horizontal dimensions, standard products (910 mm × 1820 mm, 910 mm × 910 mm, 30 mm × 50 mm, etc.) are cut and used according to the construction site. The thickness of the heat insulating material is set according to each specification. However, when a thick heat insulating material is required, one thick heat insulating material is taken into consideration in consideration of problems such as loading, drilling, and warping. It is preferable to use a plurality of thinly stacked ones rather than using the above. Moreover, when it is necessary to take a gradient, a thermal insulation board with a gradient can be used.

As the material of the steel plate constituting the bottom portion 4-1 of the metal fixed disk and the edge storing concave portion 4 used in the present invention, a stainless steel plate, zinc / aluminum / magnesium plating or galvanization prevention is used. A steel plate that does not easily rust even in a humid state, such as a steel plate that has been subjected to rust treatment, is preferably used. The thickness is about 0.6 to 1.5 mm, and the shape is arbitrary, such as a square or rectangular plate shape, or a circular or elliptical disk shape, and the size is one side or an outer diameter of 50. It is formed to about ~ 100 mm.
The steel plate constituting the bottom portion 4-1 is preferably in accordance with the shape of the edge storing concave portion 4, and the strip-shaped steel plate is cut to the length in the longitudinal direction of the edge storing concave portion 4. Can be used. The width is about 40 mm to 60 mm, and the length is arbitrarily formed. Further, it is preferably configured by laminating and integrating a thermoplastic resin coating layer on at least the upper surface of the steel plate, thereby hot air welding with the waterproof sheet Bonding by solvent welding is possible. Furthermore, when joining a waterproof sheet and the said steel plate by the induction heating method, a heat welding layer can be laminated | stacked and integrated at least on the upper surface of the steel plate. This heat-welded layer includes a thermoplastic resin and a hot melt adhesive, and examples of the hot melt adhesive include polyester, polyamide, and ethylene-vinyl acetate copolymer hot melt adhesives.

  The screws used in the present invention can be made of carbon steel, alloy steel, stainless steel, or other steel materials. Also, the head shape of the fixing screw should be flat, flat, and pan so that the head does not protrude from the top surface of the tarpaulin fixing disk etc., and the recessed shape of the seat surface to be hung with a screwdriver or wrench is a cross hole, hexagonal hole, A square hole is preferred.

When laying a plurality of waterproof sheets on the ground, even if the adjacent waterproof sheets are stacked one on top of the other by the bonding structure of the present invention, a flat joint having substantially no step is obtained, and drainage of rainwater It can be used widely as a joining structure for waterproof sheets laid on the rooftops, verandas, and terraces of buildings such as buildings, condominiums, and detached houses. it can.

DESCRIPTION OF SYMBOLS 1 Base 2 The member which forms the recessed part for edge storage 2A Inorganic board 3 Waterproof sheet 3-1 Waterproof sheet located in the lower side 3-2 Waterproof sheet located in the upper side 4 Recessed edge storage 4-1 For storing edge The bottom of the recess 4-2 The side surface of the edge storing recess 5 The edge of the waterproof sheet 5-1 The edge of the waterproof sheet positioned on the lower side 5-2 The edge of the waterproof sheet positioned on the upper side 6 Overlap Alignment part 7 Fixing disk 7A Thermoplastic resin-coated metal disk 8 Screw 10 Plural members forming the bottom of the edge storing recess 10A Steel plate having a thermoplastic resin coating layer forming the bottom of the edge storing recess 101 End Removable steel plate that forms the bottom of the edge storage recess 11 Heat insulation board 11-1 Heat insulation board with gradient 13 Drain pipe 14 Valley 15 Flow direction of rainwater (direction of inclination)
DESCRIPTION OF SYMBOLS 16 Reinforcement sheet | seat in a prior art 17 Screw hole 18 Thermoplastic resin coating layer 19 Substantially rectangular plate-shaped main body 20 Bending part 21-1 to 21-3 Steel body molding which forms the bottom part of the edge storage recessed part 22 Control part 23 Intermediate material

Claims (4)

A waterproof sheet joining structure in which a plurality of waterproof sheets are laid and fixed on a base,
A recess formed on the base, the bottom of which is formed by a member that can be freely fitted up and down; and
A step of the overlapping portion characterized by having an overlapping portion in which the edge portion of one waterproof sheet is accommodated in the concave portion and the edge portion of another waterproof sheet adjacent thereto is overlapped and joined thereto. Waterproof sheet bonding structure that eliminates the problem. 2. The waterproof sheet joining structure according to claim 1, wherein a depth of the concave portion is substantially the same as a thickness of an end edge portion of the one waterproof sheet. Bottom of the recess, overlapping of any of claims 1-2, characterized in that it is formed by a member having a thermoplastic resin coating layer on the junction surface between the edge of the one tarpaulin Waterproof sheet bonding structure that eliminates the level difference at the mating part. Forming a recess formed on the base by a member whose bottom is freely detachable up and down ,
The edge of one waterproof sheet is stored in the recess, the edge of the one waterproof sheet is joined to the bottom of the recess, and the edge of another waterproof sheet adjacent to it is overlapped thereon. Joined,
A waterproof sheet joining method that eliminates the difference in level between adjacent waterproof sheets.

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