Fixing disk for waterproof sheet or heat insulating material, fixing tool, and fixing structure

Abstract

To provide a mechanism for restraining rotational looseness of a male screw, in a construction method for fixing a waterproof sheet or a heat insulating material to a metallic roof backing by a fixing disk and the male screw.SOLUTION: A fixing disk (1) for a waterproof sheet or a heat insulating material used for fixing a waterproof sheet (23) or a heat insulating material (22) to a substrate (21) with a male screw (10), wherein the fixing disk has a through hole (2) for inserting a shaft portion (11) of the male screw and a counterbore (3) for accommodating a head portion (12) of the male screw, a plurality of Cut (5) are provided in a seat portion (4) located below the counterbore, and a direction of the Cut does not pass through a center of the through hole. When the external thread is a right-hand thread, the direction of the Cut is inclined to the left with respect to the direction toward the center of the through-hole in a plan view of the fixing disk.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a waterproof sheet or heat insulating material fixing disk, a waterproof sheet or heat insulating material fixing device, and a waterproof sheet or heat insulating material fixing structure using the same, which are used to fix waterproof sheets or heat insulating materials with male screws on the rooftops, roofs, verandas, balconies, etc. of buildings. [Background technology]

[0002] Roof waterproofing using PVC or other waterproofing sheets can be done using adhesive bonding, or mechanical fixing, which uses fixing disks and male screws to secure the waterproofing sheet to the roof. Mechanical fixing can be divided into two types: pre-cast mechanical fixing, in which a fixing disk is fixed to the roof with male screws and then the fixing disk and the waterproofing sheet are fixed by heat fusion or adhesive bonding, and post-cast mechanical fixing, in which the waterproofing sheet is laid out on the roof, and then a fixing disk is fixed on top of the waterproofing sheet with male screws and the fixing disk part is secured in place with a waterproof patch.

[0003] In the sheet waterproofing machine fixing method, it has been reported that when the waterproofing sheet is blown by the wind, vibrations cause force to be applied to the male screw, leading to loosening of the male screw, so measures are needed.

[0004] In addition, in asphalt waterproofing and urethane waterproofing, it is known that loosening of the male screws can occur even in steel base insulation waterproofing methods in which insulation material is fixed to a metal roof with male screws.

[0005] In order to solve the problem of loosening of the male screw, a known technique is to prevent loosening of the male screw by increasing the frictional force between the seat portion of the fixing disk and the seat surface portion of the male screw. For example, Japanese Patent No. 7013079 (Patent Document 1) discloses a method of increasing frictional force and preventing loosening of the male screw by providing unevenness on the surface of the countersunk portion of the fixing disk and applying a resin coating to the seating surface of the male screw. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 7013079 Summary of the Invention [Problem to be solved by the invention]

[0007] However, if the waterproofing sheet vibrates, the male thread and the fixing disk may rub against each other, causing wear and a decrease in friction. Also, if the roof underlayment or fastening material (insulation material) deforms over time, the fastening force of the male thread will decrease, making it impossible to ensure sufficient friction, which may lead to loosening. [Means for solving the problem]

[0008] The present invention provides a self-tightening property by providing multiple inclined notches in the seat portion, which is the portion located below the countersink in the fixing disk, making it difficult for the male screw to rotate in the loosening direction, and also by causing the fixing disk to move due to the vibration of the waterproof sheet if the fastening force of the male screw weakens, causing the notches in the seat portion of the fixing disk to interfere with the head of the male screw, thereby encouraging the male screw to rotate in the tightening direction.

[0009] The present invention (I) is a disk for fixing a waterproof sheet or insulating material used to fix the waterproof sheet or insulating material to a substrate with a male screw, characterized in that the disk for fixing the waterproof sheet or insulating material has a through hole for inserting the shank of the male screw and a countersink for accommodating the head of the male screw, and has multiple notches in the seat located below the countersink, the direction of the notches not passing through the center of the through hole. The present invention (II) is a waterproof sheet or insulation material fixing device used to fix a waterproof sheet or insulation material to a substrate with a male screw, the waterproof sheet or insulation material fixing device comprising a waterproof sheet or insulation material fixing disk and a male screw, the waterproof sheet or insulation material fixing disk having a through hole for inserting the shank of the male screw and a countersink for accommodating the head of the male screw, the seat portion located below the countersink has a plurality of notches, the direction of the notches does not pass through the center of the through hole, and when the male screw is a right-handed thread, the direction of the notches is inclined to the left of the direction toward the center of the through hole when the waterproof sheet or insulation material fixing disk is viewed in a plane, and when the male screw is a left-handed thread, the direction of the notches is inclined to the right of the direction toward the center of the through hole when the waterproof sheet or insulation material fixing disk is viewed in a plane. The present invention (III) is a fixing structure for a waterproof sheet or insulating material, comprising a base, a waterproof sheet or insulating material, a fixing disk for the waterproof sheet or insulating material, and a male screw for fixing the fixing disk for the waterproof sheet or insulating material to the base, wherein the fixing disk for the waterproof sheet or insulating material has a through hole for inserting the shank of the male screw and a countersink for accommodating the head of the male screw, and a plurality of notches are provided in the seat located below the countersink, the direction of the notches does not pass through the center of the through hole, and when the male screw is a right-handed thread, the direction of the notches is inclined to the left of the direction toward the center of the through hole when the fixing disk for the waterproof sheet or insulating material is viewed in a plane, and when the male screw is a left-handed thread, the direction of the notches is inclined to the right of the direction toward the center of the through hole when the fixing disk for the waterproof sheet or insulating material is viewed in a plane.

[0010] The present invention includes the following embodiments. [1] A disk for fixing a waterproof sheet or insulating material used to fix a waterproof sheet or insulating material to a substrate with a male screw, the disk for fixing a waterproof sheet or insulating material having a through hole for inserting the shank of the male screw and a countersink for accommodating the head of the male screw, and having multiple notches in the seat located below the countersink, the direction of the notches not passing through the center of the through hole. [2] A disk for fixing a waterproof sheet or heat insulating material as described in [1], in which, when the male thread is a right-hand thread, the direction of the notch is tilted to the left of the direction toward the center of the through hole when the disk for fixing a waterproof sheet or heat insulating material is viewed in a plane, and when the male thread is a left-hand thread, the direction of the notch is tilted to the right of the direction toward the center of the through hole when the disk for fixing a waterproof sheet or heat insulating material is viewed in a plane. [3] A waterproof sheet or insulation material fastener used to fasten a waterproof sheet or insulation material to a substrate with a male screw, the waterproof sheet or insulation material fastener including a waterproof sheet or insulation material fastening disk and a male screw, the waterproof sheet or insulation material fastening disk having a through hole for inserting the shank of the male screw and a countersink for accommodating the head of the male screw, the seat portion located below the countersink having multiple notches, the direction of the notches not passing through the center of the through hole, if the male screw is a right-handed screw, the direction of the notches is inclined to the left of the direction toward the center of the through hole when the waterproof sheet or insulation material fastening disk is viewed in a plane, and if the male screw is a left-handed screw, the direction of the notches is inclined to the right of the direction toward the center of the through hole when the waterproof sheet or insulation material fastening disk is viewed in a plane. [4] A fixing device for a waterproof sheet or heat insulating material according to [3], in which the seat surface of the male screw is uneven. [5] A fixing structure for a waterproof sheet or heat insulating material, comprising a base, a waterproof sheet or heat insulating material, a fixing disk for the waterproof sheet or heat insulating material, and a male screw for fixing the fixing disk for the waterproof sheet or heat insulating material to the base, wherein the fixing disk for the waterproof sheet or heat insulating material has a through hole for inserting the shank of the male screw and a countersink for accommodating the head of the male screw, and a plurality of notches are provided in the seat located below the countersink, the direction of the notches does not pass through the center of the through hole, and when the male screw is a right-handed screw, the direction of the notches is inclined to the left of the direction toward the center of the through hole when the fixing disk for the waterproof sheet or heat insulating material is viewed in a plane, and when the male screw is a left-handed screw, the direction of the notches is inclined to the right of the direction toward the center of the through hole when the fixing disk for the waterproof sheet or heat insulating material is viewed in a plane. [Effects of the Invention]

[0011] The fixing disk and fixing device for waterproof sheets or heat insulating materials of the present invention not only can prevent the male screw from rotating and loosening, but also has the ability to self-tighten, meaning that if the fastening force of the male screw weakens, the fixing disk will move due to vibration of the waterproof sheet or heat insulating material, causing the notch in the seat of the fixing disk to interfere with the head of the male screw, thereby urging the male screw to rotate in the tightening direction. The waterproof sheet or heat insulating material fixing structure of the present invention is less likely to loosen and come off due to rotation of the male screw. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of a disk for fastening a waterproof sheet or insulating material according to the present invention. [Figure 2] FIG. 2 is an enlarged plan view of one embodiment of the seat of the tarpaulin or insulation fastening disk of the present invention. [Figure 3] FIG. 3 is a perspective view of a disk for fastening a waterproof sheet or insulating material according to the present invention. [Figure 4] FIG. 4 is an enlarged perspective view of the seat of the fixing disk of the waterproof sheet or insulating material of the present invention. [Figure 5] FIG. 5 is a diagram (plan view) showing a state in which a male screw is attached to the counterbore of the fixing disk. [Figure 6] FIG. 6 is a perspective view showing an example of a male screw having irregularities on the bearing surface. [Figure 7] FIG. 7 is a diagram (plan view) showing a state in which a male screw having an uneven bearing surface is attached to a counterbore of a fixing disk. [Figure 8] FIG. 8 is a cross-sectional view of a waterproof sheet fixing structure using a pre-cast mechanical fixing method. [Figure 9] FIG. 9 is a cross-sectional view of a waterproof sheet fixing structure using a post-cast mechanical fixing method. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present invention will be described in detail below with reference to the drawings, but the present invention is not limited to those shown in the drawings. FIG. 1 is a projection view of a disk for fixing a waterproof sheet or a heat insulating material of the present invention, where FIG. 1(a) is a plan view and FIG. 1(b) is a front cross-sectional view (cross-sectional view along line II). FIG. 2 is an enlarged plan view of one embodiment of the seat of the tarpaulin or insulation fastening disk of the present invention. FIG. 3 is a perspective view of a disk for fastening a waterproof sheet or insulating material according to the present invention. FIG. 4 is an enlarged perspective view of the seat of the fixing disk of the waterproof sheet or insulating material of the present invention. FIG. 8 is a cross-sectional view of a waterproof sheet fixing structure using a pre-cast mechanical fixing method. FIG. 9 is a cross-sectional view of a waterproof sheet fixing structure using a post-cast mechanical fixing method.

[0014] The present invention (I) is a disk 1 for fixing a waterproof sheet or insulating material used to fix a waterproof sheet 23 or insulating material 22 to a base 21 with a male screw 10, and is characterized in that the disk 1 for fixing a waterproof sheet or insulating material has a through hole 2 for inserting the shank 11 of the male screw 10 and a countersink 3 for accommodating the head 12 of the male screw 10, and has a plurality of notches 5 in the seat 4 located below the countersink, and the direction of the notches 5 does not pass through the center C of the through hole 2. The seat refers to the part located below the seat.

[0015] When the male thread 10 is a right-handed thread, the direction of the notch 5 is inclined to the left (clockwise) of the direction toward the center C of the through-hole 2 when the fixing disk 1 is viewed in a plan view, and when the male thread 10 is a left-handed thread, the direction of the notch 5 is inclined to the right (counterclockwise) of the direction toward the center C of the through-hole 2 when the fixing disk 1 is viewed in a plan view. In other words, when the direction of the notch 5 is inclined to the left of the direction toward the center C of the through-hole 2, a right-handed thread is used as the male thread 10, and conversely, when the direction of the notch 5 is inclined to the right of the direction toward the center C of the through-hole 2, a left-handed thread is used as the male thread 10. When the direction of the notch 5 is inclined to the left of the direction toward the center C of the through-hole 2, the male screw 10 tends to rotate to the right, i.e., clockwise, and is difficult to rotate to the left, i.e., counterclockwise. Therefore, if a right-handed thread is used as the male screw 10, not only can the male screw 10 be prevented from rotating and loosening, but if the fastening force of the male screw 10 weakens, the fixing disk 1 will move due to vibration of the waterproof sheet or heat insulating material, causing the inclined notch 5 in the seat portion 4 of the fixing disk 1 to interfere with the seat surface of the male screw 10, thereby providing a self-fastening property that encourages the male screw 10 to rotate in the tightening direction.

[0016] The shape of the through hole 2 in a plan view is not limited as long as the shank 11 of the male screw 10 can be inserted therethrough, but is preferably circular. When the planar shape of the through hole 2 is circular, the diameter of the through hole 2 is not limited as long as the shank 11 of the male screw 10 can be inserted, but is preferably 3 to 12 mm, more preferably 4 to 10 mm, and even more preferably 5 to 8.5 mm.

[0017] The counterbore 3 has a shape suitable for accommodating the head 12 of the male screw 10. The shape and dimensions of the counterbore 3 are matched to the shape and dimensions of the head 12 of the male screw 10 to be used. Conversely, the male screw 10 to be used should match the shape and dimensions of the counterbore 3. The shape and dimensions of the countersink 3 are not limited as long as they are suitable for accommodating the head 12 of the male screw 10, but the diameter D3 of the countersink 3 on the upper surface of the fixing disk 1 is preferably 5 to 24 mm, more preferably 8 to 20 mm, and even more preferably 12 to 16 mm.

[0018] The pitch P5 of the incisions 5 is not limited as long as the effects of the present invention are achieved, but is preferably 1.0 to 10 mm, more preferably 2 to 7 mm, and even more preferably 3 to 5 mm on the circumference of the through-hole 2. Here, the pitch P5 of the incisions 5 refers to the distance between two corresponding points on adjacent incisions 5.

[0019] The angle θ formed by the direction T5 of the incision 5 and the straight line L passing through the base point O of the incision 5 and the center C of the through hole 2 is not limited as long as the effects of the present invention are achieved, but is preferably 20 to 60°, more preferably 30 to 60°, and even more preferably 30 to 50°.

[0020] The number of notches 5 is not limited as long as the effects of the present invention are achieved, but the counterbore 3 preferably has 3 to 12 notches, more preferably 3 to 9 notches, and even more preferably 3 to 6 notches.

[0021] The shape of the incision 5 in plan view is not limited as long as the effects of the present invention are achieved, but is preferably an elongated rectangle. When the shape of the incision 5 in plan view is an elongated rectangle, the width W5 of the incision 5 is preferably 1 to 6 mm, more preferably 2 to 5 mm, and even more preferably 2.5 to 4 mm.

[0022] The shape of the portion sandwiched between two adjacent notches (hereinafter also referred to as the "protrusion") in plan view is not limited as long as it achieves the effects of the present invention, and examples include a triangle and a trapezoid, but a triangle is preferred.

[0023] The outer peripheral shape of the fixing disk 1 in plan view is not limited as long as it achieves the effects of the present invention, and may be circular, elliptical, square, rectangular, regular hexagonal, regular octagonal, or other polygonal shapes, but is preferably circular. When the outer peripheral shape of the fixing disk 1 in a plan view is circular, the outer diameter D1 of the fixing disk 1 is not limited as long as the effects of the present invention are achieved, but is preferably 45 to 120 mm, more preferably 50 to 110 mm, and even more preferably 55 to 100 mm.

[0024] The thickness of the fixing disk 1 is not limited as long as the effects of the present invention are achieved, but is preferably 1 to 12 mm, more preferably 1.5 to 8 mm, and even more preferably 2 to 5 mm.

[0025] The material constituting the fixing disk 1 is not limited as long as it produces the effects of the present invention, and examples thereof include metals such as iron, copper, stainless steel, brass, aluminum, magnesium, titanium, and zinc, as well as composite materials and plated products thereof, with stainless steel being preferred. The fixing disk 1 may also be made of a metal core material, at least a portion of whose surface is coated with a resin such as vinyl chloride resin.

[0026] The method for manufacturing the fixing disk 1 is not limited, but for example, the fixing disk 1 can be manufactured by punching out a material that constitutes the fixing disk 1 to a thickness that is equivalent to the thickness of the fixing disk 1.

[0027] The present invention (II) relates to a fastener for a waterproof sheet or a heat insulating material, which is used to fasten the waterproof sheet or the heat insulating material to a substrate with a male screw. The waterproofing or insulation fastener includes a waterproofing or insulation fastening disk and a male thread. In the present invention (II), the fixing disk 1 for the waterproof sheet or heat insulating material is the fixing disk of the present invention (I). The external screw 10 is selected so that its head 12 fits into the counterbore 3 of the fastening disk 1 . FIG. 5 is a diagram (plan view) showing a state in which the male screw 10 is attached to the counterbore 3 of the fixing disk 1. As shown in FIG.

[0028] The external screw 10 includes a shank 11 and a head 12. The shank 11 includes at least a threaded portion, and may or may not include a cylindrical portion. The shape and dimensions of the male screw 10 are not limited as long as the effects of the present invention are achieved. However, the outer diameter of the threaded portion of the male screw 10 is preferably 3 to 12 mm, more preferably 4 to 10 mm, and even more preferably 6 to 8.5 mm. The diameter D of the head 12 of the male screw 10 in a plan view is 12The length of the shaft portion 11 of the male screw 10 is preferably 10 to 180 mm, more preferably 30 to 120 mm, and even more preferably 40 to 80 mm.

[0029] The bearing surface 13 of the male screw 10 may or may not have unevenness, but it is preferable that it has unevenness. By having unevenness on the bearing surface 13 of the male screw 10, friction between the bearing surface 13 of the male screw 10 and the seat portion 4 of the fixing disk 1 increases, making the male screw 10 more difficult to loosen. The shape of the projections and recesses on the bearing surface 13 of the male screw 10 is not limited as long as the effects of the present invention are achieved, and may be a groove as shown in FIG. FIG. 6 is a perspective view showing an example of a male screw 10 having unevenness on the bearing surface 13. In FIG. FIG. 7 is a diagram (plan view) showing a state in which the male screw 10 having irregularities on the bearing surface 13 of FIG. 6 is attached to the counterbore 3 of the fixing disk 1.

[0030] The present invention (III) relates to a waterproof sheet or insulating material fixing structure 20 including a substrate 21, a waterproof sheet 23 or insulating material 22, a disk 1 for fixing the waterproof sheet or insulating material, and a male screw 10 for fixing the disk for fixing the waterproof sheet or insulating material to the substrate. In the present invention (III), the fixing disk 1 for the waterproof sheet or heat insulating material is the fixing disk of the present invention (I). The male screw 10 can use the male screw included in the fixing tool of the present invention (II).

[0031] The substrate 21 is preferably a roof substrate, more preferably a metal roof substrate.

[0032] The waterproof sheet 23 may be made of, but is not limited to, a vinyl chloride resin sheet, a vulcanized rubber sheet, a non-vulcanized rubber sheet, a thermoplastic elastomer sheet, a thermoplastic polyurethane elastomer sheet, an ethylene vinyl acetate resin sheet, an asphalt roofing sheet, etc., but is preferably a vinyl chloride resin sheet. The thickness of the waterproof sheet 23 is not limited to, but is preferably 0.3 to 10 mm, more preferably 0.5 to 5 mm, and even more preferably 1 to 3 mm.

[0033] The insulating material 22 is not limited to, but examples thereof include rigid urethane foam, polystyrene foam, phenol foam, glass wool, rock wool, wool press, carbonized cork, cellulose fiber, etc. The thickness of the insulating material 22 is not limited to, but is preferably 5 to 300 mm, more preferably 10 to 200 mm, and even more preferably 20 to 150 mm.

[0034] FIG. 8 is a cross-sectional view of a waterproof sheet fixing structure using a pre-cast mechanical fixing method. The waterproof sheet fixing structure 20 in Figure 8 includes a base 21, insulating material 22 provided on the base, fixing disks 1 scattered on the insulating material, external screws 10 for fixing the fixing disks and insulating material to the base, and a waterproof sheet 23 covering the insulating material and fixing disks.

[0035] The waterproof sheet fixing structure 20 of Figure 8 can be manufactured by, but is not limited to, laying insulation material 22 on a base 21, scattering fixing discs 1 on the insulation material 22, fixing the fixing discs 1 and insulation material 22 to the base 21 with male screws 10, covering the insulation material 22 and fixing discs 1 with a waterproof sheet 23, and then fixing the fixing discs 1 and waterproof sheet 23 by heat sealing.

[0036] FIG. 9 is a cross-sectional view of a waterproof sheet fixing structure using a post-cast mechanical fixing method. The waterproof sheet fixing structure 20 in Figure 9 includes a substrate 21, insulation material 22 placed on the roof substrate, a waterproof sheet 23 placed on the insulation material, fixing disks 1 scattered on the waterproof sheet, external screws 10 for fixing the fixing disks, waterproof sheet and insulation material to the roof substrate, and a patch 24 for covering the fixing disks.

[0037] The waterproof sheet fixing structure 20 of Figure 9 can be manufactured by, but is not limited to, laying insulation material 22 on a substrate 21, laying a waterproof sheet 23 on the insulation material 22, interspersing fixing discs 1 on the waterproof sheet 23, fixing the fixing discs 1, waterproof sheet 23 and insulation material 22 to the substrate 21 with male screws 10, and then covering the fixing discs 1 with patches 24. [Industrial Applicability]

[0038] The fastening disc or fastener of the present invention can be suitably used to fasten waterproofing or insulation to a substrate. [Explanation of symbols]

[0039] 1 fixed disk 2 through holes 3. Reeling 4 Seat area 5 Cut 10 Male thread 11 Shaft 12 Head 13 Seat 20 Waterproof sheet fixing structure 21 Base 22 Insulation 23 Tarpaulin 24 Patch

Claims

1. A disk for fixing a waterproof sheet or heat insulating material used to fix the waterproof sheet or heat insulating material to a substrate with a male screw, the disk for fixing a waterproof sheet or heat insulating material having a through hole for inserting the shank of the male screw and a countersink for accommodating the head of the male screw, and a plurality of notches are provided in the seat located below the countersink, the direction of the notches not passing through the center of the through hole.

2. A disk for fixing a waterproof sheet or insulating material as described in claim 1, wherein, when the male thread is a right-handed thread, the direction of the notch is inclined to the left of the direction toward the center of the through hole when the disk for fixing a waterproof sheet or insulating material is viewed in a plane, and when the male thread is a left-handed thread, the direction of the notch is inclined to the right of the direction toward the center of the through hole when the disk for fixing a waterproof sheet or insulating material is viewed in a plane.

3. A waterproof sheet or insulation material fastener used to fasten a waterproof sheet or insulation material to a substrate with a male screw, the waterproof sheet or insulation material fastener comprising a waterproof sheet or insulation material fastening disk and a male screw, the waterproof sheet or insulation material fastening disk having a through hole for inserting the shank of the male screw and a countersink for accommodating the head of the male screw, the seat portion located below the countersink having a plurality of notches that do not pass through the center of the through hole, and when the male screw is a right-handed screw, the direction of the notches is inclined to the left of the direction toward the center of the through hole when viewed in plan, and when the male screw is a left-handed screw, the direction of the notches is inclined to the right of the direction toward the center of the through hole when viewed in plan.

4. 4. The fastener for a waterproof sheet or a heat insulating material according to claim 3, wherein the bearing surface of the male screw has an uneven surface.

5. A fixing structure for a waterproof sheet or insulating material, comprising a base, a waterproof sheet or insulating material, a fixing disk for the waterproof sheet or insulating material, and a male screw for fixing the fixing disk for the waterproof sheet or insulating material to the base, wherein the fixing disk for the waterproof sheet or insulating material has a through hole for inserting the shank of the male screw and a countersink for accommodating the head of the male screw, and a plurality of notches are provided in the seat located below the countersink, the direction of the notches does not pass through the center of the through hole, and when the male screw is a right-handed thread, the direction of the notches is inclined to the left of the direction toward the center of the through hole when the fixing disk for the waterproof sheet or insulating material is viewed in a plane, and when the male screw is a left-handed thread, the direction of the notches is inclined to the right of the direction toward the center of the through hole when the fixing disk for the waterproof sheet or insulating material is viewed in a plane.

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