JP2007056454A - Waterproof-sheet fixing implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof-sheet fixing implement which prevents a decrease in welding strength to the waterproof sheet, by preventing the curving of a thermally-welded layer part outside a reinforcing rib of a fixing implement even if a screw is exessively fastened when the waterproof sheet is fixed by the screw. <P>SOLUTION: In this waterproof-sheet fixing implement, a reinforcing rib is provided in a recessed shape in the top surface of a fixing plate, the top surface of which is covered with a thermally-welded layer; a mounting hole, through a fixing screw passes, is formed in a central part; and a countersunk recess for fixing a screw head is formed on the periphery of the mounting hole. The waterproof-sheet fixing implement makes the waterproof sheet fixed onto a waterproof construction surface in the state of being interposed between the waterproof construction surface and the waterproof sheet made of a synthetic resin. An easily bendable structure is provided between a screw mounting hole of the fixing plate and the reinforcing rib. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a waterproof sheet for waterproof construction for floors of buildings, sloped roofs, verandas and roof balconies of houses, or civil engineering waterproofing constructions, and the like. More specifically, a waterproof sheet fixing tool for mechanically fixing a waterproof construction surface to a waterproof construction surface. More specifically, a fixing plate whose upper surface is covered with a heat-welded layer is secured with a screw on the waterproof construction surface, After laying the waterproof sheet on top, place an induction heating device on the upper surface of the waterproof sheet at a position corresponding to the fixing plate, and melt the waterproof sheet into the heat-welded layer by induction heating to waterproof the waterproof sheet. The present invention relates to a waterproof sheet fixture for fixing on a construction surface.

This type of waterproof sheet fixture A is formed in a circular shape using a fixing plate such as a steel plate as shown in FIG. 3, and is fixed to the mounting hole 3 through which the fixing screw D passes and the periphery thereof. A screw head fixing countersunk recess 4 for accommodating the head D of the machine screw is formed, and a reinforcing rib 5 is provided in order to provide a required strength as a fixture.
However, when the waterproof sheet fixing tool is fixed to the base with a fixing screw such as a screwdriver, the screw is bent from the center to the outer periphery as shown in FIG. 2 and the waterproof area of the waterproof sheet are reduced, and the weld strength is reduced. Moreover, the problem appears remarkably when the fixture is constructed on the heat insulating material.

  The general fixture has a shape as shown in Patent Documents 1 and 2, but it is easy to bend from the center of the fixing plate to the outer periphery when the fixing screw is fixed with a screwdriver. As a result, the welding strength is reduced. In order to solve this problem, a method of changing the thickness or material of the material of the fixture itself can be considered, but in that case, there is a concern that the fixture becomes expensive.

JP 2002-168226 A JP 2003-328506 A

  When fixing a fixture to the groundwork, considering workability and cost, it is difficult to use a tool with a torque adjustment function, and an impact driver or the like is often used, and the fixing plate is often tightened excessively. If it is tightened too much, it will curve from the center of the fixed plate to the outer periphery. When the fixing plate and the waterproof sheet are heat-welded by induction heating or the like, the curved portion cannot be heat-welded, and the welding area of the fixing plate and the waterproof sheet is reduced, so that sufficient welding strength cannot be obtained. As a result, the effect of wind pressure repeatedly applied (the force to lift the joined sheets) causes a decrease in welding strength over time, and the reliability of waterproof construction is lost.

  The present invention has been made in view of such a current situation, and the object of the present invention is to provide a waterproofing portion in which the heat-welded layer portion outside the reinforcing ribs of the fixture is not curved even when the screw is over-tightened. An object of the present invention is to provide a waterproof sheet fixture that does not impair the welding strength with the sheet.

The waterproof sheet fixture of the present invention that achieves the above object is provided with a mounting hole in which a reinforcing rib is recessed on the upper surface of a fixing plate whose upper surface is covered with a heat-welded layer, and a fixing screw is passed through in the center. A screw head fixing countersunk recess is formed on the periphery of the waterproof construction surface and is interposed between the waterproof construction surface and the synthetic resin waterproof sheet to secure the waterproof sheet on the waterproof construction surface. And
A waterproof sheet fixture, wherein a flexible structure is provided between a screw mounting hole of the fixing plate and a reinforcing rib (claim 1).
It is preferable that the flexible structure provided between the screw mounting hole of the fixing plate and the reinforcing rib is a dent and / or a small hole. Further, it is preferable that an easily flexible structure provided between the screw mounting hole of the fixing plate and the reinforcing rib is provided at an asymmetric position with respect to the fixing screw mounting hole.

According to the waterproof sheet fixture of the present invention, by providing a flexible structure between the fixing screw mounting hole of the fixing plate and the reinforcing rib recessed, the impact when fixing the screw is flexible. As shown in FIG. 1, the gap between the fixing screw mounting hole and the reinforcing rib is recessed.
That is, since the periphery of the flexible structure is structurally weak with respect to the stress generated when the screw is fixed, the portion is depressed, and the stress generated when the screw is fixed can be absorbed.
As a result, the heat-welded layer portion outside the reinforcing rib is not curved, the welding area between the fixing plate and the waterproof sheet is not reduced, and there is no possibility of causing a peeling phenomenon at the welded portion with the waterproof sheet.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The same reference numerals are given to the same components throughout the drawings.

The waterproof sheet fixing tool A according to the present invention is configured by laminating and integrating a heat welding layer 2 fixed on the waterproof sheet B side on the upper surface of the fixing plate 1 fixed on the waterproof construction surface C.
Incidentally, examples of the waterproof construction surface C include a flat roof or a sloped roof of a building, a floor surface of a house veranda or a roof balcony, or a waterproof construction for civil engineering.

  The fixing plate 1 fixed on the waterproof construction surface C is not particularly limited, but it rusts even in high humidity conditions such as a stainless steel plate and a steel plate to which rust prevention treatment such as zinc, aluminum, magnesium plating or galvanization is applied. A hard steel plate is preferably used.

  Moreover, the fixing plate 1 is formed in the same thickness, shape, and size as the steel plate used in this type of conventional waterproof sheet fixing tool. For example, the thickness is about 0.6 to 1 mm, and the shape is arbitrary, such as a rectangular plate shape that is a square or a rectangle, or a circular or elliptical disk shape, and the size is one side or an outer diameter of 50 to 100 mm. Formed to a degree.

The heat welding layer 2 laminated and integrated on the upper surface of the fixing plate 1 is formed of a thermoplastic resin, a hot melt adhesive or the like that can be heat welded to the waterproof sheet B by heating. Examples of the thermoplastic resin used here include polyethylene, polypropylene, ethylene-vinyl acetate copolymer, olefin resins such as EEA (ethylene ethyl acrylate), vinyl chloride resins, acrylic resins, urethane resins, and thermoplastics. Examples of the hot melt adhesive include polyester, polyamide, and ethylene-vinyl acetate copolymer hot melt adhesives.
These thermoplastic resins, hot melt adhesives, etc. are laminated and integrated with the upper surface of the fixing plate 1 to a thickness of 0.01 to 1.0 mm by a known method such as a coating method or a sheet laminating method. The welding layer 2 is formed.
At this time, as the rust prevention treatment of the fixing plate 1, the thermoplastic resin, the hot melt adhesive, and the like may be laminated and integrated on the back surface.

  And the standing rib 1a is formed in the outer periphery of the fixed plate 1 over the perimeter, and the fixing screw D which fixes the said fixed plate 1 (waterproof sheet fixing tool A) on the waterproof construction surface C in the center part. A screw mounting hole 3 for passing through and a screw head fixing countersink recess 4 for forming a head D ′ of the fixing screw D so as not to protrude from the upper surface of the fixing plate 1 are formed around the screw mounting hole 3. The reinforcing rib 5 is recessed so as to surround the screw head fixing countersunk recess 4.

The reinforcing rib 5 is formed to increase the strength of the fixing plate 1. However, since the waterproof sheet B is not welded to the upper surface of the reinforcing rib 5, the area occupied by the reinforcing rib 5 on the upper surface of the fixing plate 1. Needs to be kept within a range in which the welding strength with the waterproof sheet B can be maintained.
That is, as long as the welding strength with the waterproof sheet B can be maintained, the reinforcing rib 5 is not particularly limited in the shape seen from the plane, and is formed discontinuously as in the embodiment shown in FIG. It may be formed by a plurality of concave portions formed, or may be formed by a continuous ring-shaped concave portion as in the embodiment shown in FIG. Furthermore, in the latter case, the ring-shaped recess is not limited to a single, but may be double or triple.

Further, when the fixing plate 1 (waterproof sheet fixture A) is fixed on the waterproof construction surface C, the number of screw mounting holes 3 formed in the fixing plate 1 is not limited to one, and a number corresponding to the number. It is fixed with the fixing screw D.
The countersink shape for fixing the screw is generally a shape that matches the fixing screw, but there is a shape that matches the countersunk screw as shown in FIG. Some of these holes are flat. Either case is possible.

  In the fixing plate 1, a flexible structure is formed at an arbitrary position between the screw mounting hole 3 and the reinforcing rib 5. The flexible structure is not particularly limited as long as it is a flexible structure, and is formed of a dent, a small hole, a different material that is more flexible than the fixture body material, a structure that is thinner than the fixture body thickness, a convex shape. Although a part structure, a structure with a damage, etc. can be mentioned, when cost, productivity of a fixture, etc. are considered, it is preferred that a flexible structure is a dent part and / or a small hole. The diameter of the small hole is usually 5 mm or less, and preferably 1 to 3 mm. In the figure, the small hole is blacked out.

The number and size of the flexible structures are arbitrary, and it is effective to provide the flexible structures asymmetrically with respect to the screw mounting holes. This is because by making it asymmetrical, when the stress at the time of fixing the screw is applied to the screw fixed countersink portion and the periphery thereof, the stress is not uniform but concentrates locally and the portion sinks to absorb the stress.
By providing the flexible structure in this way, the strength of the fixture is somewhat lowered, but the degree of the reduction needs to be limited to a range that does not affect the pull-out strength of the screws necessary for the waterproof structure.

  In addition, the flexible structure can be provided in the screw head fixing recess 4 and in this case, the flexible structure can be provided from the screw head fixing recess 4 to the reinforcing rib 5.

  When such a flexible structure is provided between the screw mounting hole 3 and the reinforcing rib 5, as shown in FIG. As a result, since the heat-welded layer outside the reinforcing rib 5 does not bend, the adhesion area between the fixing plate and the waterproof sheet does not decrease, and there is a risk of causing a peeling phenomenon at the welded portion with the waterproof sheet. Disappear.

  EXAMPLES Next, although an Example is given and this invention is demonstrated in more detail, this invention is not limited to these Examples.

<Example 1>
In the embodiment shown in FIG. 4, a recessed portion 6 a is provided between the screw head fixing countersunk recess 4 and the reinforcing rib 5. As a result, when the screw was fixed, the periphery of the recessed portion 6a was recessed, and the heat welding layer outside the reinforcing rib 5 was not curved, and a sufficient welding area was secured.

<Example 2>
In the embodiment shown in FIG. 5, a small hole 6 b is provided between the screw head fixing countersunk recess 4 and the reinforcing rib 5. As a result, when the screw was fixed, the periphery of the small hole 6b was recessed, and the heat welding layer outside the reinforcing rib 5 was not curved, and a sufficient welding area was secured.

<Example 3>
In the embodiment shown in FIG. 6, a recess 6 a is provided between the screw head fixing countersink recess 4 and the reinforcing rib 5. As a result, when the screw was fixed, the periphery of the recessed portion 6a was recessed, and the heat welding layer outside the reinforcing rib 5 was not curved, and a sufficient welding area was secured.

<Example 4>
In the embodiment shown in FIG. 7, a small hole 6 b is provided between the screw head fixing countersunk recess 4 and the reinforcing rib 5. As a result, when the screw was fixed, the periphery of the small hole 6b was recessed, and the heat welding layer outside the reinforcing rib 5 was not curved, and a sufficient welding area was secured.

<Example 5>
In the embodiment shown in FIG. 8, a recess 6 a is asymmetrically provided between the screw mounting hole 3 and the reinforcing rib 5. As a result, when the screw was fixed, the periphery of the recessed portion 6a was recessed, and the heat welding layer outside the reinforcing rib 5 was not curved, and a sufficient welding area was secured.

<Example 6>
In the embodiment shown in FIG. 9, a small hole 6 b is asymmetrically provided between the screw mounting hole 3 and the reinforcing rib 5. As a result, when the screw was fixed, the periphery of the small hole 6b was recessed, the heat welding layer outside the reinforcing rib 5 was not curved, and it was confirmed by visual observation that the welding area was sufficient (the screw fixing countersunk recess 4 was Flat shape).

<Example 7>
In the embodiment shown in FIG. 10, a recessed portion 6a is provided on the screw fixing countersink recess 4. As shown in FIG. As a result, when the screw was fixed, the periphery of the recessed portion 6a was recessed, and the heat welding layer outside the reinforcing rib 5 was not curved, and a sufficient welding area was secured.

  When the fixing tool of each example was screw-fixed to the ground, a waterproof sheet was laid, and construction was performed with an induction heating apparatus, a sufficient welding area could be secured and sufficient welding strength could be obtained.

  The waterproof sheet fixing tool of the present invention is waterproof because the heat welding layer portion outside the reinforcing rib concave portion of the fixing tool does not bend even if it is tightened excessively at the time of screw fixing, and does not impair the welding strength with the waterproof sheet. It can be used extensively for construction.

Sectional drawing which shows the waterproof sheet fixing tool concerning this invention at the time of fixing a screw too much at the time of screw fixation. Sectional drawing which shows the waterproof sheet fixing tool of a prior art example at the time of screw fixing, when fixing screws are tightened too much. Sectional drawing which shows a prior art example. The perspective view of the waterproof sheet fixing tool which concerns on Example 1 of this invention. The perspective view of the waterproof sheet fixing tool which concerns on Example 2 of this invention. The perspective view of the waterproof sheet fixing tool which concerns on Example 3 of this invention. The perspective view of the waterproof sheet fixing tool which concerns on Example 4 of this invention. The perspective view of the waterproof sheet fixing tool which concerns on Example 5 of this invention. (A) The perspective view of the waterproof sheet fixing tool which concerns on Example 6 of this invention. (B) Sectional drawing of the Example 6 counterbore part. The perspective view of the waterproof sheet fixing tool which concerns on Example 7 of this invention.

Explanation of symbols

A: Waterproof sheet fixing tool B: Waterproof sheet C: Waterproof construction surface D: Fixing screw D ': Screw head 1: Fixing plate 1a: Rising rib 2: Thermal welding layer 3: Screw mounting hole 4: Screw head Fixing countersink recess 5, 5 ': Reinforcing rib 6: Flexible structure 6a: Recess 6b: Small hole 7: Heat insulating material

Claims (3)

Reinforcing ribs are recessed on the upper surface of the fixing plate whose upper surface is covered with a heat-welded layer, and a mounting hole through which the fixing screw passes and a countersink recess for fixing the screw head are formed around it. A waterproof sheet fixture for interposing between a construction surface and a synthetic resin waterproof sheet to fix the waterproof sheet on the waterproof construction surface,
A waterproof sheet fixture, wherein a flexible structure is provided between a screw mounting hole of the fixing plate and a reinforcing rib. The waterproof sheet fixture according to claim 1, wherein the flexible structure provided between the screw mounting hole of the fixing plate and the reinforcing rib is a recess and / or a small hole. The flexible structure provided between the screw mounting hole of the fixing plate and the reinforcing rib is provided at an asymmetrical position with respect to the mounting hole of the fixing screw. The specified tarpaulin fixing tool.

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