JP6227455B2 - Waterproof sheet fixing method and sheet mounting plate - Google Patents

Description

  The present invention relates to a method for fixing a waterproof sheet and a sheet mounting plate that are spread on a slope of a disposal site, a rooftop outer wall surface of a building, a tunnel wall surface, and the like.

  A sheet mounting plate with an adhesive layer that melts by heating is fixed on the construction surface, and a waterproof sheet is placed on the sheet mounting plate. Then, the sheet mounting plate is heated from above the waterproof sheet by electromagnetic induction heating. Then, a waterproof sheet bonding method for bonding a waterproof sheet to a sheet mounting plate by melting an adhesive layer is known. The waterproof sheet is made of a transparent or semi-transparent material, and an electromagnetic induction heating device is set and adhesion is performed while visually checking the sheet mounting plate through the waterproof sheet during heating and welding. However, the waterproof sheet is not only transparent or translucent, but there are various types depending on the installation location, and it may be transparent or translucent inside the tunnel. By using a material having weather resistance, an opaque waterproof sheet is used. Since this waterproof sheet is opaque, the sheet mounting plate cannot be seen through, and it is impossible to visually align the heating coil of the electromagnetic induction heating device. It locates by finding the plate. For this reason, work is not easy, and when the waterproof sheet is thick, accurate positioning becomes difficult.

  In view of this, a method for detecting an induction heating body has been proposed that can easily and accurately detect the relative positional relationship between the sheet mounting plate and the heating coil (see Patent Document 1). This induction heating body (sheet mounting plate) detection method applies a high frequency power from a high frequency power source to a heating coil through a resonance circuit, thereby heating a heating element on the surface of the disk fixed to the wall surface. Welds to disc. In this detection method, a protection circuit, a measurement circuit, and display means are connected to the resonance circuit, and an impedance change or a resonance frequency change of the resonance circuit is measured by the measurement circuit. These changes vary greatly if the positions of the heating element and the heating coil are deviated. By observing this change with the display means, the heating coil is placed at the position of the heating element covered by the waterproof sheet. Can be adjusted accurately.

Japanese Patent No. 3290211

  However, the above-described conventional method for detecting an induction heating body requires a complicated and expensive apparatus including a resonance circuit, a protection circuit, a measurement circuit, and a display unit. Further, since the measurement circuit finds the position of the disk (sheet mounting plate) while measuring the impedance change or resonance frequency change of the resonance circuit, there is a problem that the construction becomes complicated. In particular, on the construction surface in a high place standing up in the primary lining of the tunnel, the construction while measuring using the above-mentioned device is dangerous.

  The present invention has been made in view of the above situation, and its purpose is to be able to grasp the position of the sheet mounting plate even when the waterproof sheet is opaque, and to easily and accurately remove the waterproof sheet without using a large-scale device. An object of the present invention is to provide a waterproof sheet fixing method and a sheet mounting plate that can be fixed to a sheet mounting plate.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
In the fixing method of the waterproof sheet 31 according to the first aspect of the present invention, the magnet 13 is attached, the thermoplastic adhesive layer 17 is attached, and the plurality of sheet attachment plates 11 made of a magnetic conductor are attached to the construction surface 27 A plate fixing step for fixing to a predetermined interval;
A sheet extending step of covering the construction surface 27 with a waterproof sheet 31,
A confirmation step of confirming the position of the sheet mounting plate 11 according to the position of the magnetic force lines of the magnet 13 visualized by superimposing the magnetic force line visualization film 35 on the waterproof sheet 31;
The confirmed position of the waterproof sheet 31 except for the magnetic force line visualization film 35 is electromagnetically heated from above the waterproof sheet 31 to heat the sheet mounting plate 11 and melt the thermoplastic adhesive layer 17. A sheet fixing step for joining the waterproof sheet 31 and the sheet mounting plate 11;
It is characterized by including.

  In this waterproof sheet 31 fixing method, the sheet mounting plate 11 is fixed to the construction surface 27 by fixing means such as a concrete nail 39. On the construction surface 27 to which the sheet mounting plate 11 is fixed, a waterproof sheet 31 is spread over the sheet mounting plate 11. When the waterproof sheet 31 is opaque, the sheet mounting plate 11 is covered with the waterproof sheet 31 and cannot be visually observed. A magnetic force line visualization film 35 is stacked from the surface side of the waterproof sheet 31 covering the construction surface 27. When the magnetic force line visualization film 35 reaches the position of the sheet attachment plate 11 located on the back side of the waterproof sheet 31, the magnetic force lines are visualized by the magnetic force lines of the magnets 13 provided on the sheet attachment plate 11. The position is confirmed based on the magnetic force lines visualized on the magnetic force line visualization film 35. For example, the waterproof sheet 31 may be marked 41. If the position of the first sheet mounting plate 11 is known in this way, the positions of other sheet mounting plates 11 arranged on the construction surface 27 at a predetermined interval can be easily found. That is, by superimposing the magnetic force line visualization film 35 at a position at a predetermined interval from the sheet mounting plate 11 found first, the accurate position of the sheet mounting plate 11 can be easily grasped and confirmed. Next, the confirmed position, for example, the position marked with the mark 41 of the waterproof sheet 31 is heated by electromagnetic induction from above the waterproof sheet 31. Thereby, the sheet attachment plate 11 is heated, the thermoplastic adhesive layer 17 is melted, and the waterproof sheet 31 and the sheet attachment plate 11 are joined. By repeating this, the waterproof sheet 31 is fixed to all the sheet mounting plates 11 at an easy and accurate position, and the waterproof sheet 31 is spread on the construction surface 27. The positions of all other sheet mounting plates 11 may be found with the magnetic force line visualization film 35 and marked with a mark 41 on the waterproof sheet 31, and electromagnetic heating is performed at all the positions of the marks 41 as described above. It is good also as performing induction | guidance | derivation and joining.

The waterproof sheet 31 fixing method according to claim 2 of the present invention fixes a plurality of sheet mounting plates 11 made of a magnetic conductor, to which the thermoplastic adhesive layer 17 is attached, to the construction surface 27 at predetermined intervals. Plate fixing process;
A magnet mounting step of mounting a magnet 13 on the surface of the sheet mounting plate 11;
A sheet extending step of covering the construction surface 27 with a waterproof sheet 31,
A confirmation step of confirming the position of the sheet mounting plate 11 according to the position of the magnetic force lines of the magnet 13 visualized by superimposing the magnetic force line visualization film 35 on the waterproof sheet 31;
The confirmed position of the waterproof sheet 31 except for the magnetic force line visualization film 35 is electromagnetically heated from above the waterproof sheet 31 to heat the sheet mounting plate 11 and melt the thermoplastic adhesive layer 17. A sheet fixing step for joining the waterproof sheet 31 and the sheet mounting plate 11;
It is characterized by including.

  In this waterproof sheet 31 fixing method, the sheet mounting plate 11 is fixed to the construction surface 27 by fixing means such as a concrete nail 39. A magnet 13 is attached to the surface of the sheet attachment plate 11. On the construction surface 27 to which the sheet mounting plate 11 is fixed, a waterproof sheet 31 is spread over the sheet mounting plate 11. When the waterproof sheet 31 is opaque, the sheet mounting plate 11 is covered with the waterproof sheet 31 and cannot be visually observed. A magnetic force line visualization film 35 is stacked from the surface side of the waterproof sheet 31 covering the construction surface 27. When the magnetic force line visualization film 35 reaches the position of the sheet attachment plate 11 located on the back side of the waterproof sheet 31, the magnetic force lines are visualized by the magnetic force lines of the magnets 13 provided on the sheet attachment plate 11. The position is confirmed based on the magnetic force lines visualized on the magnetic force line visualization film 35. For example, the waterproof sheet 31 may be marked 41. If the position of the first sheet mounting plate 11 is known in this way, the positions of other sheet mounting plates 11 arranged on the construction surface 27 at a predetermined interval can be easily found. That is, by superimposing the magnetic force line visualization film 35 at a position at a predetermined interval from the sheet mounting plate 11 found first, the accurate position of the sheet mounting plate 11 can be easily grasped and confirmed. Next, the confirmed position, for example, the position marked with the mark 41 of the waterproof sheet 31 is heated by electromagnetic induction from above the waterproof sheet 31. Thereby, the sheet attachment plate 11 is heated, the thermoplastic adhesive layer 17 is melted, and the waterproof sheet 31 and the sheet attachment plate 11 are joined. By repeating this, the waterproof sheet 31 is fixed to all the sheet mounting plates 11 at an easy and accurate position, and the waterproof sheet 31 is spread on the construction surface 27. In addition, it is good also as attaching the magnet 13 to all the sheet | seat attachment plates 11, or good also as attaching the magnet 13 to the sheet | seat attachment plate 11 in any position.

The sheet mounting plate 11 according to claim 3 of the present invention comprises a plate body 15 made of a magnetic conductor and formed in a disk shape and having a fixing hole 21 in the center,
A thermoplastic adhesive layer 17 provided on the waterproof sheet mounting surface 23;
A recess 19 recessed in the waterproof sheet mounting surface 23 around the fixing hole 21;
A magnet 13 attached to the recess 19;
It is characterized by comprising.

  In the sheet mounting plate 11, a fixing hole 21 is formed at the center of the plate body 15, and the plate body 15 is fixed to the construction surface 27 by inserting fixing means such as a concrete nail 39 into the fixing hole 21. The sheet mounting plate 11 is formed of a size in which the magnet 13 fits into the recess 19. The magnet 13 disposed in the recess 19 is fixed to the recess 19 by a magnetic force, or is fixed to the recess 19 with an adhesive or the like. By forming the magnet 13 in a disk shape or a ring shape, for example, the center of the plate body 15 can be easily grasped. Thereby, the center position of the position of the magnet 13 represented on the magnetic force line visualization film 35 becomes the center of the plate body 15. Thus, the center of the sheet mounting plate 11 that is covered with the opaque waterproof sheet 31 and cannot be visually observed is easily and reliably grasped by the magnetic force line visualization film 35.

The seat mounting plate 11 according to claim 4 of the present invention is the seat mounting plate according to claim 3,
The magnet 13 includes a plurality of magnets and is attached to the recess 19.

  In this sheet mounting plate 11, the magnets 13 fixed to the recesses 19 of the sheet mounting plate 11 are constituted by a plurality of magnets 13, so that the center position of each magnet 13 represented on the magnetic force line visualization film 35 is a plate. It becomes the center of the main body 15.

  According to the waterproof sheet fixing method according to claim 1 of the present invention, an opaque waterproof sheet can be obtained without using a large-scale device for finding the position of the sheet mounting plate that has become invisible with the waterproof sheet. The position of the hidden sheet mounting plate can be easily found, and the waterproof sheet can be easily and accurately fixed to the sheet mounting plate, and the waterproof sheet can be spread on the construction surface.

  According to the fixing method of the waterproof sheet according to claim 2 of the present invention, the magnet is attached after the fixing to the sheet mounting plate fixed to the construction surface. The magnet can be attached only to the sheet mounting plate, and the number of magnets used can be reduced, resulting in cost reduction. And, without using a large-scale device to find the position of the sheet mounting plate that is not visible due to the expansion of the waterproof sheet, it is easy to find the position of the sheet mounting plate that is hidden behind the opaque waterproof sheet This waterproof sheet can be easily and accurately fixed to the sheet mounting plate, and the waterproof sheet can be spread on the construction surface.

  According to the sheet mounting plate of claim 3 according to the present invention, even if the waterproof sheet is opaque, the position of the sheet mounting plate can be grasped by the magnet, the electromagnetic induction heating can be set at an accurate position, and the sheet mounting plate Accordingly, it is possible to reliably perform the thermoplastic bonding without shifting, and to secure the mounting state of the waterproof sheet.

  According to the sheet mounting plate according to claim 4 of the present invention, the magnet fixed to the concave portion of the sheet mounting plate is composed of a plurality of magnets, whereby the center of each magnet represented on the magnetic force line visualization film is formed. The position can indicate the center of the plate body. And even if the waterproof sheet is opaque, the position of the sheet mounting plate can be grasped by these magnets, the electromagnetic induction heating can be set at an accurate position, and the thermoplastic bonding can be surely performed without shifting from the sheet mounting plate. It is possible to secure the mounting state of the waterproof sheet.

It is a top view of the sheet | seat attachment plate which concerns on embodiment of this invention. It is AA sectional drawing of the sheet | seat mounting plate shown in FIG. It is a disassembled perspective view showing the variation of a magnet. It is a perspective view of a plate fixing process. It is a perspective view of a magnet attachment process. It is sectional drawing before the sheet extension of a sheet extension process. It is sectional drawing after sheet extension of a sheet extension process. It is a perspective view at the time of magnetic field line visualization film use of a check process. It is a perspective view at the time of marking of a confirmation process. It is a perspective view of a sheet fixing process. It is a front view showing the position of the sheet | seat attachment plate fixed to the construction surface and covered with the waterproof sheet.

Embodiments according to the present invention will be described below with reference to the drawings.
1 is a plan view of a seat mounting plate 11 according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the seat mounting plate 11 shown in FIG. It is.
The sheet mounting plate 11 according to the present embodiment includes a plate main body 15, a thermoplastic adhesive layer 17 (see FIG. 6), an annular groove 19 as a recess, and a magnet 13.

  The plate body 15 is made of a magnetic conductor, is formed in a disc shape, and has a fixing hole 21 formed in the center. Specifically, it is obtained by press-molding a metal plate. A flange portion 25 is formed on the outer periphery of the plate body 15 so as to be lower on the construction surface side than the waterproof sheet mounting surface 23 which is the surface. That is, in the plate body 15, when the flange portion 25 hits the construction surface 27, the waterproof sheet attachment surface 23 floats from the construction surface 27 (see FIG. 4). The surface of the plate body 15 has a concentric annular groove 19 around the fixing hole 21. The periphery of the fixing hole 21 is recessed in the same manner as the annular groove 19, and the protrusion between the annular groove 19 and the fixing hole 21 has a height substantially equal to that of the waterproof sheet mounting surface 23. The seat mounting plate 11 has a small hole 29 in the annular groove 19 and the flange portion 25. The small holes 29 serve as air vent holes when the waterproof sheet 31 is welded. That is, when the waterproof sheet 31 is put on the waterproof sheet mounting surface 23 of the sheet mounting plate 11, the annular groove 19 becomes a sealed space. When the plate body 15 is heated from the outside of the waterproof sheet 31 in this state, the air in the annular groove 19 expands and the waterproof sheet 31 expands. The small hole 29 can release the air in the annular groove 19 at this time to the construction surface 27 side. This prevents the waterproof sheet 31 from being ruptured or damaged.

  Stainless steel can be used as a material for the plate body 15. More specifically, SUS420J2 of martensitic stainless steel in the JIS 400 series, SUS430 of ferritic stainless steel, SUS329J4L of austenitic ferrite (duplex) stainless steel of JIS329 series can be suitably used, and preferably SUS430. The By using SUS430, the plate body 15 can be provided with magnetism and also have high corrosion resistance. The plate body 15 may be made of other materials as long as it has magnetism and corrosion resistance.

  The seat mounting plate 11 is fixed to the construction surface 27. The construction surface 27 is a concrete surface itself, a natural ground surface itself, or a non-woven fabric covering the concrete surface and natural ground surface. . In the case of a nonwoven fabric, the sheet attachment plate 11 is used as a member for fixing the nonwoven fabric. In this case, the nonwoven fabric is spread on the construction surface 27 by the sheet mounting plate 11 prior to the expansion of the waterproof sheet 31. And the waterproof sheet 31 adhere | attached on the surface of the sheet | seat attachment plate 11 is further extended so that this nonwoven fabric may be covered.

  The thermoplastic adhesive layer 17 is attached to the waterproof sheet mounting surface 23 which is at least the surface opposite to the back surface 33 facing the construction surface 27. The thermoplastic adhesive layer 17 can be a hot melt adhesive layer, for example. As the hot melt adhesive layer, for example, a material of polyester type, ethylene vinyl acetate type, synthetic rubber type, olefin type or the like can be adopted, and a melting point of 70 to 160 ° C. can be used. From the viewpoint of improving the heating efficiency by the electromagnetic induction heating device and reducing the device cost, about 150 ° C. is preferable. The heating of the sheet mounting plate 11 by the electromagnetic induction heating device is set to a temperature of about 150 to 180 ° C.

  The annular groove 19 is concentrically recessed in the waterproof sheet mounting surface 23 around the fixing hole 21. The cross-sectional shape of the annular groove 19 can be a U-shape or a square shape. In order to avoid local bending at the time of press molding and to make cracks difficult to occur, the cross-sectional shape orthogonal to the groove extending direction is preferably a U-shaped groove bottom. The groove bottom is formed without projecting to the construction surface side from the flange portion 25.

  The magnet 13 is formed in a ring shape that follows the shape of the annular groove 19. The magnet 13 is formed in a rectangular cross section smaller than the depth of the annular groove 19. Therefore, the magnet 13 attached to the annular groove 19 does not protrude from the waterproof sheet attachment surface 23 of the plate body 15. As the magnetizing direction of the magnet 13, the thickness direction of the plate main body 15 or one-side multipolar magnetized one is used. In the case of single-sided multipole magnetization, the magnetized surface is used in the direction of the waterproof sheet and is attached to the sheet mounting plate 11 with an adhesive or the like. Further, in the case of the magnet 13 having the magnetization direction on both surfaces in the thickness direction, the magnet 13 is attached by being magnetized on the sheet attachment plate 11.

  In addition to the ring shape, the magnet may be formed in a disk shape. In the case of this disk-shaped magnet 37, it is formed to have a smaller diameter than the outer diameter of the annular groove 19 of the seat mounting plate 11, and is a single-sided multipole magnetized magnet. Is attached to the plate body 15, for example, the ridge 20.

In addition, the magnet can be attached to the flange portion 25 which is the outer peripheral edge portion of the plate body 15. Also in this case, the magnet is formed in a ring shape.
Moreover, the magnet may be composed of a plurality. A plurality of magnets are attached to the annular groove 19 at equal intervals in the circumferential direction. Although the magnets 13 having a plurality of configurations can be formed in an arbitrary shape, they are preferably in the same shape, and may be formed in the same cross-sectional shape as that of the annular groove 19. As for the magnet 13, the magnetic force should just be found by the magnetic force line visualization film 35 (refer FIG. 8) over a waterproof sheet.

  In the case of a plurality of magnets, they are arranged apart from each other at a position where the center is known. That is, two or more magnets are attached. If there are two, each intermediate point becomes the plate center position. If there are four, the intersection of the diagonal lines orthogonal to each other is the plate center position. If there are three, the center position of the equilateral triangle becomes the plate center position. The magnet may be formed in an arc shape along the annular groove 19. According to the arc-shaped magnet, the fixing strength with respect to the annular groove 19 can be increased.

  The magnet 13 may be a resin product in which magnetic powder is kneaded. The magnet 13 may be insert-molded in resin. The magnet 13 may be a strong magnet such as a sintered magnet or neodymium. The magnet 13 can be attached to the plate body 15 with its own magnetic force. Moreover, in addition to magnetic force, you may fix using an adhesive agent. And a magnetic force line is visualized by the magnetic force line visualization film 35. Whether the magnet 13 is singular or plural, the position of the magnetic pole is visualized and a pattern is formed by the magnetic force line visualization film 35.

  The sheet mounting plate 11 is fixed to the construction surface 27 by passing through the fixing holes 21 with concrete nails 39 as fixing means. A waterproof sheet 31 is laid out on the construction surface 27 on which the sheet mounting plate 11 is fixed. In the present embodiment, a black opaque material is used for the waterproof sheet 31. As the waterproof sheet 31, for example, a synthetic resin sheet such as polyolefin or vinyl chloride having a thickness of about 1 to 2 mm is used.

Next, the procedure of the fixing method of the waterproof sheet 31 will be described.
4 is a perspective view of the plate fixing process, FIG. 5 is a perspective view of the magnet mounting process, FIG. 6 is a cross-sectional view of the sheet extending process before the sheet is stretched, FIG. 7 is a cross-sectional view of the sheet extending process after the sheet is stretched, and FIG. Is a perspective view when using the magnetic force line visualization film in the confirmation process, FIG. 9 is a perspective view when marking in the confirmation process, FIG. 10 is a perspective view of the sheet fixing process, and FIG. 11 is fixed to the construction surface 27 and covered with the waterproof sheet 31. It is a front view showing the position of the broken sheet mounting plate 11.
The fixing method of the waterproof sheet 31 includes a plate fixing process, a magnet mounting process, a sheet spreading process, a confirmation process, and a sheet fixing process.

  In the plate fixing step, a plurality of sheet mounting plates 11 made of a magnetic conductor to which a plurality of magnets 13 are attached and a thermoplastic adhesive layer 17 is attached are fixed to a standing construction surface 27 at predetermined intervals (see FIG. 4). The construction surface 27 may be a slope (slope) of a disposal site, an outer wall surface such as a rooftop, a primary lining surface of a tunnel, or the like.

  Each magnet 13 may be attached in advance to the sheet attachment plate 11 or may be attached after fixing the sheet attachment plate 11 to the construction surface 27. In the present embodiment, as shown in FIG. 5, the magnet 13 is attached later to the sheet attachment plate 11 fixed to the construction surface 27 in the magnet attachment step.

  In the sheet extending step, the construction surface 27 is covered with an opaque waterproof sheet 31 together with the sheet mounting plate 11 as shown in FIGS. In the present embodiment, the waterproof sheet 31 is a black opaque one. The waterproof sheet 31 may be opaque in other colors, or transparent or translucent.

  In the confirmation step, as shown in FIG. 8, the magnetic force line visualization film 35 in which the magnetic fluid is uniformly dispersed in the film is overlaid on the waterproof sheet 31. Thereby, the position of the magnetic force line of the magnet 13 appears as a pattern (pattern) 45 on the magnetic force line visualization film 35 and is visualized. In the example shown in the figure, the magnet 13 has a ring shape, and a ring-shaped pattern 45 (shown by hatching in the figure) appears. Then, the surface position of the waterproof sheet 31 on which the pattern 45 appears is confirmed. In this confirmation step, markings such as those shown in FIG. 9 may be applied to the waterproof sheet 31 at the locations indicated by the patterns 45 appearing on the magnetic force line visualization film 35 for marking. That is, a mark 41 such as an X mark is attached to the approximate center position of these patterns 45. This marking is effective when the mark 41 is continuously attached to the waterproof sheet 31.

  As shown in FIG. 10, in the sheet fixing step, the position where the waterproof sheet 31 is confirmed except the magnetic force line visualization film 35, for example, the position where the mark 41 of the above-described waterproof sheet 31 is attached is electromagnetically The sheet attachment plate 11 is heated by electromagnetic induction heating by an induction heating device to melt the thermoplastic adhesive layer 17 and join the waterproof sheet 31 and the sheet attachment plate 11. The electromagnetic induction heating device includes a heating unit 43 that incorporates an induction coil. The heating unit 43 is excited by an alternating current, and generates an eddy current in the plate body 15 by the electromagnetic induction action of the generated magnetic field. For this reason, the plate body 15 generates heat due to eddy current loss, and the thermoplastic adhesive layer 17 is melted to bond the waterproof sheet 31.

Next, the effect | action of the fixing method of the waterproof sheet 31 which has said structure is demonstrated.
In the fixing method of the waterproof sheet 31 according to the present embodiment, the plurality of sheet attachment plates 11 are attached to the construction surface 27 at a predetermined interval. The construction surface 27 is a natural ground of a tunnel or a disposal site, a primary lining of the tunnel, a wall surface on the building roof, or the like. The sheet mounting plate 11 is fixed to the construction surface 27 by a concrete nail 39 or the like.

  On the construction surface 27 to which the sheet mounting plate 11 is fixed, a waterproof sheet 31 is spread over the sheet mounting plate 11. The sheet mounting plate 11 is covered with the waterproof sheet 31 and cannot be visually observed. When the construction surface 27 is a vertical surface, the waterproof sheet 31 to be stretched is supported at the upper edge by a support material or the like so that it does not sag, or the upper end side is temporarily fixed to the construction surface 27 by a temporary fixing material such as a nail. May be.

  Next, the magnetic force line visualization film 35 is overlapped from the surface side of the waterproof sheet 31 covering the construction surface 27. When the magnetic force line visualization film 35 reaches the position of the sheet attachment plate 11 located on the back side of the waterproof sheet 31, the magnetic force lines are visualized as a pattern 45 by the magnetic force lines of the magnets 13 provided on the sheet attachment plate 11. The position is confirmed based on the magnetic force lines visualized on the magnetic force line visualization film 35. Further, for example, a mark 41 is attached to the waterproof sheet 31. If the position of the first sheet mounting plate 11 is known in this way, the position of another sheet mounting plate 11 arranged at a predetermined interval can be easily found. That is, by superimposing the magnetic force line visualization film 35 at a position at a predetermined interval from the sheet mounting plate 11 found first, the accurate position of the sheet mounting plate 11 can be easily grasped and confirmed. In this way, the positions of all other sheet mounting plates 11 may be marked on the waterproof sheet 31. In addition, each sheet mounting plate 11 may be arranged and fixed at equal intervals of a predetermined dimension set in advance with respect to the construction surface 27. In this case, the magnetic force line visualization film is applied to all the sheet mounting plates 11. 35, the sheet mounting plate 11 at a predetermined position is found on the magnetic force line visualization film 35, and the other sheet mounting plates 11 are measured on the waterproof sheet 31 using a measure or the like to determine the position. It is also possible to set the same mark as above.

  Next, the position where the waterproof sheet 31 is confirmed or the position marked 41 is electromagnetically heated from above the waterproof sheet 31. Thereby, the sheet attachment plate 11 is heated, the thermoplastic adhesive layer 17 is melted, and the waterproof sheet 31 and the sheet attachment plate 11 are joined. By repeating this at all the confirmation positions and the positions of the marks 41, the waterproof sheet 31 is fixed to all the sheet mounting plates 11 at an easy and accurate position.

  Further, in the seat mounting plate 11 according to the present embodiment, a fixing hole 21 is formed in the center of the plate body 15, and the plate body 15 is fixed to the construction surface 27 by inserting a concrete nail 39 or the like into the fixing hole 21. Is done. The sheet attachment plate 11 may be fixed to the construction surface 27 with the magnet 13 attached in advance, or after being fixed to the construction surface 27, the magnet 13 may be attached later. If the magnet 13 is attached before being fixed to the construction surface 27, the work at the site can be reduced. Further, if the magnet 13 is attached after being fixed to the construction surface 27, it is possible to save the trouble of separating the sheet attachment plates 11 that are mutually adsorbed by magnetic force during plate conveyance or plate fixing process.

  The sheet attachment plate 11 can be easily attached to the magnet 13 regardless of whether the magnet 13 is attached in advance or the magnet 13 is attached on site. That is, the magnet 13 is formed with a size that fits in the annular groove 19. The magnet 13 has a shape along the annular groove 19 and is disposed in the annular groove 19. The magnet 13 disposed in the annular groove 19 is fixed to the annular groove 19 by a magnetic force. The magnet 13 may be fixed to the plate body 15 with an adhesive in addition to the magnetic attractive force. The magnet 13 attached to the annular groove 19 does not protrude from the waterproof sheet attachment surface 23 of the plate body 15. This is to prevent the waterproof sheet 31 from being broken by the protruding magnet 13 when the waterproof sheet 31 is fixed.

  Since the ring-shaped magnet 13 is disposed in the annular groove 19 due to its shape, the center of the plate body 15 can be easily grasped. Thereby, the center position of the position of the ring-shaped magnet 13 represented on the magnetic force line visualization film 35 becomes the center of the plate body 15 and can be confirmed. In the case of the disk-shaped magnet 37, the center position of the circle represented by the magnetic force line visualization film 35 is the center of the plate body 15.

  Thus, the center of the sheet mounting plate 11 that is covered with the opaque waterproof sheet 31 and cannot be viewed is easily and reliably grasped by the magnetic force line visualization film 35 and can be confirmed.

  Therefore, according to the fixing method of the waterproof sheet 31 according to the present invention, the waterproof sheet 31 can be fixed to the sheet mounting plate 11 easily and accurately without using a large-scale device.

  Further, according to the sheet mounting plate 11 according to the present invention, since the magnet 13 is provided, even if the waterproof sheet 31 is opaque, the position can be easily grasped by the magnetic force line visualization film 35.

DESCRIPTION OF SYMBOLS 11 ... Sheet mounting plate 13 ... Magnet 15 ... Plate main body 17 ... Thermoplastic adhesive layer 19 ... Recess (annular groove)
DESCRIPTION OF SYMBOLS 21 ... Fixing hole 23 ... Waterproof sheet attachment surface 27 ... Construction surface 31 ... Waterproof sheet 33 ... Back surface 35 ... Magnetic field line visualization film

Claims (4)

A plate fixing step of fixing a plurality of sheet mounting plates made of a conductor having magnetism, a magnet having a magnet attached, a thermoplastic adhesive layer, and a magnetic conductor at predetermined intervals;
A sheet extending step of covering the construction surface with a waterproof sheet;
In accordance with the position of the magnetic lines of force of the magnet visualized by overlaying the magnetic force line visualization film on the waterproof sheet, a confirmation step of confirming the position of the sheet mounting plate;
Except for the magnetic force line visualization film, the confirmed position of the waterproof sheet is electromagnetically heated from above the waterproof sheet, thereby heating the sheet mounting plate and melting the thermoplastic adhesive layer, and the waterproof sheet and the A sheet fixing step for joining the sheet mounting plates;
A method of fixing a waterproof sheet, comprising: A plate fixing step in which a thermoplastic adhesive layer is deposited and a plurality of sheet mounting plates made of a magnetic conductor are fixed to a construction surface at a predetermined interval;
A magnet mounting step of mounting a magnet on the surface of the sheet mounting plate;
A sheet extending step of covering the construction surface with a waterproof sheet;
In accordance with the position of the magnetic lines of force of the magnet visualized by overlaying the magnetic force line visualization film on the waterproof sheet, a confirmation step of confirming the position of the sheet mounting plate;
Except for the magnetic force line visualization film, the confirmed position of the waterproof sheet is electromagnetically heated from above the waterproof sheet, thereby heating the sheet mounting plate and melting the thermoplastic adhesive layer, and the waterproof sheet and the A sheet fixing step for joining the sheet mounting plates;
A method of fixing a waterproof sheet, comprising: A plate body made of a magnetic conductor and formed in a disc shape with a fixed hole in the center;
A thermoplastic adhesive layer provided on the waterproof sheet mounting surface;
A recess recessed in the waterproof sheet mounting surface around the fixing hole;
A magnet attached to the recess;
A sheet mounting plate comprising:   The seat mounting plate according to claim 3, wherein the magnet includes a plurality of magnets and is attached to the recess.

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