JP6546787B2 - Waterproof screw and structure installation structure - Google Patents

Description

  The present invention relates to a waterproof screw and a structure installation structure used to install a structure on, for example, a roof or the like.

  BACKGROUND ART In recent years, installation of solar cells has been promoted in all places, such as public facilities and general households, from environmental concerns and policies. Installation of a solar cell is realized by fixing a solar cell module and a structure such as a mount for fixing the same on the outside such as a roof or a roof, and a screw is used for the fixing.

  However, rainwater or the like may intrude into the interior of the roof from the screw holes formed in the roof to fix the structure, and therefore, as shown in Patent Document 1, for example, the space between the screw holes and the screw is filled. The waterproof screw which covered the sealing material to the axial part of a screw is used for fixation of a structure.

  However, as in the waterproof screw shown in Patent Document 1, when the waterproof screw is inserted into the screw hole simply by providing the sealing material in the vicinity of the tip of the shaft, the tip of the waterproof screw is hidden by the sealing material and the sealing material There is a problem that it is difficult to insert the waterproof screw into the screw hole because the diameter of the shaft portion is larger than that of the screw hole. In addition, when the waterproof screw is inserted into the screw hole, the tip portion of the seal material may be caught in the opening of the screw hole, and the seal material may be peeled from the shaft before being filled in the screw hole. Therefore, the sealing material is not sufficiently filled between the screw hole and the waterproof screw, and rain water may enter.

JP 2012-140844 A

  Provided is a waterproof screw which can be easily inserted into a screw hole and the seal material is not easily peeled off.

  According to the present invention, a screw member including a shaft and a distal end formed at one end of the shaft and covering at least a part of the shaft and the periphery of the distal end. A waterproof screw is provided, characterized in that it comprises: a sealing material tapered at the tip.

  The waterproof screw of the present invention is formed with a tapered seal at its tip, so that it can be easily inserted into the screw hole, and the seal at the tip does not get caught in the opening of the screw hole. There is little risk of the material coming off the shaft. Therefore, the sealing material is filled between the screw hole and the waterproof screw, and the intrusion of rain water can be more reliably prevented.

FIG. 5 is a side view of a waterproof screw according to an embodiment of the present invention. It is a side view showing another example of a waterproof screw by an embodiment of the present invention. It is a sectional view showing a state where a structure is fixed to a roof using a waterproof screw by an embodiment of the present invention, and (a) is a figure showing a state before inserting a waterproof screw in a screw hole, (b) The figure which shows the state which inserted the waterproof screw in the middle of the screw hole, (c) is a figure which shows the state which fixed the structure by the waterproof screw.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following embodiments, the same or similar components are denoted by the same reference numerals, and the drawings are appropriately scaled in order to facilitate understanding.

  The waterproof screw 1 of the present embodiment will be described. FIG. 1 is a side view showing a waterproof screw 1. The waterproof screw 1 comprises a screw member 10 having a threaded shank 11, a head 12 and a tip 13 opposite the head 12. The tip 13 is tapered. Furthermore, the waterproof screw 1 is provided with a sealing material 15 provided so as to cover the periphery of a part of the shaft 11 and the entire tip 13 continuously with the periphery.

  The screw member 10 is formed of a hexagon whose head 12 has a spring washer and a flat washer. This is an example, and other head shapes may be used, such as, for example, nabe type, dish type, round dish and the like.

  As described above, the sealing material 15 is provided so as to cover the periphery of a part of the shaft 11 and the whole of the tip 13. The seal member 15 does not have to be provided so as to cover the entire shaft portion 11 because the surface portion of the seal member 15 is extended toward the head 12 when inserted into a screw hole of a roof or a structure. For example, the seal member 15 is provided on the shaft portion 11 in accordance with the portion corresponding to the thickness of the roof so as to be waterproof against the screw holes of the roof. In the present embodiment, the length L1 of the shaft 11 is about 65 mm, and the length L2 of the sealing material 15 covering the shaft 11 is about 40 mm. The thickness of the seal member 15 covering the shaft portion 11 is about 1 mm, the diameter D1 of the shaft portion 11 is about 6 mm, and the diameter D2 including the seal member 15 is about 8 mm. Moreover, the length L3 which the part which is not covered with the sealing material 15 of the axial part 11 and which the threaded part exposes is exposed is about 25 mm. These are examples, and the length L2 which the sealing material 15 covers the axial part 11 is determined according to the thickness of the structure to fix and a roof. In addition, the sealing material 15 may cover the entire shaft portion 11.

  In the present embodiment, sticky butyl rubber is used as the sealing material 15. The butyl rubber is fixed to the shaft 11 by, for example, winding a butyl tape obtained by applying butyl rubber to a tape (releasing paper) around the screw member 10. After the butyl rubber which is the sealing material 15 is fixed to the shaft portion 11 and the distal end portion 13, the butyl rubber is tapered according to the shape of the distal end portion 13. In addition to the butyl rubber, the sealing material 15 may use a rubber material (elastic body) such as ethylene-propylene rubber (EPDM: Ethylene-Propylene-Diene methylene linkage).

  Before peeling off the release tape of butyl tape, butyl rubber adhered to the screw member 10 is covered with the release paper and is not exposed. Therefore, it is possible to suppress adhesion of the waterproof screws to each other, for example, at the time of storage, transport, etc. of the waterproof screw 1. Moreover, it can suppress that butyl rubber sticks to a worker's hand at the time of installation work. When the waterproof screw 1 is used, the release paper is peeled off from the waterproof screw 1 and inserted into the screw hole with the butyl rubber exposed.

  Another example of this embodiment is shown in FIG. Similar to the waterproof screw 1 shown in FIG. 1, the waterproof screw 1 a shown in FIG. 2 includes a screw member 10, and a sealing material 15 covering a part of the shaft 11 and the tip 13 of the screw member 10. The sealing material 15 of the waterproof screw 1 a further includes an extension portion 16 extending from the tip of the tip portion 13. When the sealing material 15 includes the extending portion 16, the extending portion 16 serves as a guide when inserting the waterproof screw 1a into the screw hole. Further, when the seal member 15 is inserted into the screw hole, the surface portion thereof is extended toward the head portion 12, so the thickness of the seal member 15 at the tip portion 13 of the screw member 10 is reduced. The presence of the portion 16 compensates for the sealing material 15, so that the tip portion 13 is prevented from being exposed. Furthermore, when the waterproof screw 1a is inserted into the screw hole 3a by the extension portion 16 which is an elastic body having a certain length, a space 3b (in the vicinity of the roofing material 32) of the screw hole 3a (see FIG. 3 (c)) is filled by the extension part 16 and the waterproofness can be further enhanced.

  The length L4 of the extended portion 16 shown in FIG. 2 is about 10 mm, and the diameter D3 thereof is about 3 mm. The diameter D3 of the extension portion 16 is formed to be about half the diameter D1 (6 mm) of the shaft portion 11. This is an example, and the length L4 and the diameter D3 of the extension portion 16 may be changed according to the thickness of the structure to be fixed, the thickness of the roof, the size of the screw member 10, and the like.

  Fig.3 (a)-(c) is sectional drawing which shows the state which fixes the structure 2 to the roof 3 using the waterproof screw 1 of this embodiment. The roof 3 is comprised by the roof material (slate board) 31, the roofing material 32, and the roof board 33 so that it may illustrate. Further, examples of the structure 2 include, for example, a solar cell module, a mount for fixing the solar cell module, a metal fitting for attaching an outdoor unit of an air conditioner, and the like.

  First, as shown in FIG. 3A, screw holes 2a and 3a in which the structure 2 is disposed on the roof 3 and the shaft 11 of the waterproof screw 1 is inserted into the roof material 31 of the structure 2 and the roof 3. Form A conventional drilling method is used to form the screw holes 2a, 3a. The screw holes 2a of the structure 2 may be formed in advance. Further, in the present embodiment, the screw holes 3 a are formed only in the roof material 31 and are not formed in the roofing material 32 or the roof plate 33. In addition, the structure of the roof 3 to show in figure is an example, and another structure may be sufficient.

  Next, as shown in FIG. 3 (b), the shaft portion 11 whose periphery is covered with the sealing material 15 is screwed into the screw holes 2a and 3a. When screwing in, since the tip of the seal member 15 is formed to be tapered, the worker can easily insert the waterproof screw 1. In addition, the sealing material 15 is not caught on the opening of the screw hole 2 a and the sealing material 15 is not peeled off from the shaft 11.

  Then, as shown in FIG. 3C, the waterproof screw 1 is screwed in until the head 12 abuts on the structure 2. At this time, the surface portion of the sealing material 15 is stretched toward the head 12 to fill the gap between the screw holes 2 a and 3 a and the shaft portion 11 of the waterproof screw 1. In addition, the tip of the sealing material 15 also fills the gap in the bottom 3 b (in the vicinity of the roofing material 32) of the screw hole 3 a. Therefore, the entry of rainwater or the like from the screw holes 2a is prevented.

  The waterproof screw according to the present embodiment has been described above with reference to the drawings. Although the waterproof screw of this embodiment is used when fixing a structure to a roof, a waterproof screw may be used when assembling a structure itself or installing a structure in parts other than a roof .

DESCRIPTION OF SYMBOLS 1 and 1a Waterproof screw 10 Screw member 11 Shaft part 12 Head 13 Tip part 15 Seal material 16 Stretching part 2 Structure 3 Roof 2a, 3a Screw hole 31 Roofing material 32 Roofing material 33 Field board

Claims (5)

A screw member comprising a shank and a tapered tip at one end of the shank;
A seal material covering at least a part of the shaft and the periphery of the tip and having a tapered shape at the tip , the seal having an extension portion extending from the tip of the tip .
, A waterproof screw characterized by having. The waterproof screw according to claim 1, wherein the sealing material comprises an elastic body. The waterproof screw according to claim 2, wherein the elastic body comprises a rubber material. A structure installation structure for installing a structure on a roof,
The structure installation structure according to any one of claims 1 to 3, wherein the structure disposed on the roof is fixed to the roof by the waterproof screw according to any one of claims 1 to 3 . The structure installation structure according to claim 4, wherein the structure is a solar cell module.

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