JP2016204955A - Screw and solar power generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw for mounting a piece of equipment to a roofing material by being screwed into a roofing board, which is capable of ensuring a high waterproof performance with a simple method.SOLUTION: Provided is a screw 100 for fixing a mounting bracket 202 to a roofing material 301 which is disposed on a roofing board 303 covered with an underlying material 302. The screw 100 includes: a male screw part 101; a flange part 102 for holding the underlying material 302, which is positioned closer to a base end part than the male screw part 101 and has a larger diameter than the male screw part 101; a shaft part disposed closer to the base end part than the flange part 102; and a head part 104 disposed on the base end part.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a screw that is screwed into a field plate and a solar power generation system that is attached to the roof using the screw in order to attach an instrument that uses sunlight, wind, radio waves, or the like or an instrument for attaching the instrument to the roof. It is about.

  In the case of a general wooden building, a wooden board called a field board is laid on the roof part, and a waterproof underlaying material is attached to the surface. A roof covering material such as a slate tile is arranged on the lower covering material. When attaching solar cell modules to the roof in a wooden structure as described above, install a tool for fixing the solar cell module by drilling holes in the roofing materials, screwing wood screws or driving nails, etc. Yes.

  In such a case, since a through hole is formed in the roof roof material and a hole is also formed in the lower roof material, it is necessary to prevent rainwater or the like from reaching the base plate through the through hole.

  In the conventional construction method, in order to ensure waterproofness, a through hole is provided in the roof covering material, and then the sealing material is filled into the through hole and then screwed in.

  Moreover, the technique described in Patent Document 1 secures waterproofness by embedding a solid embedding material in a through-hole provided in a roof covering material instead of a liquid sealing material.

JP 2013-23893 A

  However, there is a case where high waterproofness cannot be obtained only by filling a through hole provided in the roof covering material with a sealing material and embedding an embedding material.

  Therefore, the present inventor has come up with the following causes as a result of diligent experiments and research to find out the cause of the high waterproofness. That is, in a general house, there is a portion where a gap is generated between the field board and the roofing material, and when the screw for fixing the device to the field board in this part is screwed, the waterproofing that has penetrated. As a result, the peripheral edge of the hole is turned up by the rotation of the screw, and a gap is generated between the base plate and the lower brazing material. And it came to discover that the waterproofness as the whole roof was impaired by water permeating the said clearance gap.

  The present invention has been made on the basis of the above knowledge, and when attaching a tool to the roof using a screw, the screw that can maintain high waterproofness by a simple construction method, and the screw is fixed to the roof. The purpose is to provide a solar power generation system.

  In order to achieve the above object, a screw according to the present invention is a screw for attaching an instrument to a roof covering disposed on a base plate covered with a waterproof lower base material, and is a male screw that is screwed into the base plate. A flange portion that is disposed closer to the base end side than the male screw portion, has a diameter larger than that of the male screw portion, and presses down the lower shell material, and is disposed so that at least a part of the flange portion overlaps, And a shaft portion that is inserted through the instrument, and a head portion that is disposed at the proximal end and has a larger diameter than the shaft portion that engages with the instrument and fixes the instrument. .

  According to the present invention, even when a screw is screwed into a base plate in order to attach an instrument to the roof, the lower covering material can be prevented from turning up and high waterproof performance can be obtained.

FIG. 1 is a perspective view showing a photovoltaic power generation system mounted on a roof. FIG. 2 is a perspective view of the solar cell module mounting portion with some solar cell modules omitted. FIG. 3 is a cross-sectional view showing a state in which the appliance is attached to the roof with screws. FIG. 4 is an exploded side view of the screw. FIG. 5 is a side view showing a state in which the cylindrical member is attached. FIG. 6 is a perspective view showing a state in which the attachment tool is attached to the roofing material with screws. FIG. 7 is a side view showing a screw according to another embodiment. FIG. 8 is a side view showing a screw according to another embodiment. FIG. 9 is a side view showing a screw according to another embodiment. FIG. 10 is a side view showing a screw according to another embodiment. FIG. 11 is a side view showing a screw according to another embodiment.

  Next, an embodiment of a screw and a photovoltaic power generation system according to the present invention will be described with reference to the drawings. In addition, the following embodiment is only what showed the example of the screw which concerns on this invention, and a solar power generation system. Therefore, the scope of the present invention is defined by the wording of the claims with reference to the following embodiments, and is not limited to the following embodiments. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept of the present invention are not necessarily required to achieve the object of the present invention. It will be described as constituting a preferred form.

  In addition, the drawings are schematic diagrams in which emphasis, omission, and ratio adjustment are appropriately performed to show the present invention, and may differ from actual shapes, positional relationships, and ratios.

  FIG. 1 is a perspective view showing a photovoltaic power generation system mounted on a roof.

  FIG. 2 is a perspective view of the solar cell module mounting portion with some solar cell modules omitted.

  In addition, the attachment tool shown in a figure is shown simply, and does not show an actual shape.

  As shown in the figure, a photovoltaic power generation system 200 is a system that is attached to the roof of a wooden house 300 and generates power based on sunlight, and includes a solar cell module 201, a fixture 202, a screw 100, and the like. It has.

  The house 300 is a general building in which a roof covering material 301 is provided on the roof. In the present embodiment, a slate tile is used as the roof covering material 301. In addition, the kind of roof covering material 301 is not limited to a slate tile, Arbitrary members, such as a tile and a Galvalume steel plate, can be employ | adopted.

  The solar cell module 201 is a panel-like instrument that generates electric power based on received sunlight. Specifically, for example, the solar cell module 201 is configured by arranging solar cell cells made of semiconductors in a matrix and sandwiching the cell array with resin or glass to form a plate.

  The attachment tool 202 is an instrument for fixing the solar cell module 201 on the roof covering material 301 by being fixed on the roof covering material 301 with the screw 100. In the case of the present embodiment, the attachment 202 is simply shown, but the shape and structure are not particularly limited, and can be arbitrarily selected depending on the type of the solar cell module 201 to be attached.

  FIG. 3 is a cross-sectional view showing a state in which the appliance is attached to the roof with screws.

  FIG. 4 is an exploded side view of the screw.

  FIG. 5 is a side view showing a state in which the cylindrical member is attached.

  As shown in these drawings, the screw 100 is a screw for attaching a mounting tool 202 as a tool to a roof covering material 301 arranged on a field board 303 covered with a waterproofing underlaying material 302.

  Generally, the roof covering material 301 is arranged in order from the bottom to the top while overlapping a part thereof, and therefore, as shown in FIG. Space). Therefore, in some cases, such a gap cannot be completely filled with the sealing material. With the solid filling material, the hole of the roof covering material 301 can be filled, but the gap cannot be filled.

  Here, the field board 303 is a wooden board that is a base for spreading the roof covering material 301 on the roof, and is a board stretched on the rafter.

  In addition, the lower roof material 302 is a member called roofing or the like, and is a sheet-like member that is attached to the base plate 303 for the purpose of waterproofing prior to the construction of the roof roof material. The kind of the lower brazing material 302 is not particularly limited, but asphalt roofing (felt-like base paper in which asphalt is infiltrated and coated, and steel material powder is attached to the front and back surfaces), modified asphalt type, butyl rubber type The thing etc. can be illustrated.

  Specifically, the screw 100 includes a male screw portion 101, a flange portion 102, a shaft portion 103, and a head portion 104. In the case of the present embodiment, the screw 100 further includes a sealing portion 107, a first cylindrical member 151, and a cutting portion 106.

  The male screw portion 101 is disposed at the tip of the entire screw 100 and includes a male screw that is screwed into the base plate 303 on the outer peripheral surface of the shaft body. In the case of the present embodiment, the male screw portion 101 functions as a tapping screw, and the screw 100 is screwed into the base plate 303 to dig deep into the base plate 303 while forming the female screw on the base plate 303. It is possible to do.

  Note that the male screw portion 101 is screwed with the lower brace material 302 before being screwed with the base plate 303. Since the lower brace material 302 is sheet-like and not rigid, as the screw 100 is screwed into the base plate 303, the portion of the lower brace material 302 that is screwed with the screw 100 is turned up. In particular, when there is a gap between the base plate 303 and the roof covering material 301, the lower covering material 302 is noticeably turned up. Conventionally, since the turning up of the lower covering material 302 was not recognized, a high waterproof effect could not be obtained.

  The flange portion 102 is disposed on the base end side (the head 104 side) with respect to the male screw portion 101, and is a portion that is larger than the nominal diameter of the male screw portion 101 and protrudes in a flange shape in a radial direction that presses the lower brace material 302. is there. Specifically, the outer diameter of the flange portion 102 is a length obtained by adding a value selected from the range of 0.5 mm to 2 mm to the nominal diameter of the male screw portion 101. If the difference from the nominal diameter of the male thread portion 101 is less than 0.5 mm, the turning up of the lower roof material 302 cannot be effectively suppressed, and if it is larger than 2 mm, the hole provided in the roof roof material 301 becomes larger. This is not preferable because the possibility of leading to the loss of the roof covering material 301 increases.

  The flange portion 102 may be formed integrally with the screw 100, or the flange portion 102 may be formed by attaching another member. In the case of the present embodiment, the flange portion 102 is formed by a separate first cylinder member 151. The first cylindrical member 151 is a cylindrical member made of a material that is flexible and has a restoring force. Specifically, it is an annular member made of resin. In addition, the material of the 1st cylinder member 151 is not limited to resin, You may form the 1st cylinder member 151 with arbitrary materials, such as a metal.

  The shaft portion 103 is disposed on the proximal end side of the male screw portion 101 and is a cylindrical portion that is inserted into the roof covering material 301 and the attachment tool 202 (tool), and is a male screw portion screwed into the field plate 303. 101 is a rod-shaped portion that is disposed between the head 101 and the head 104 that fastens the fixture 202. The surface of the shaft portion 103 is provided with a smooth surface or an annular protrusion that bites into the first cylinder member 151 to increase the waterproof property in order to increase the adhesion with the first cylinder member 151 and obtain high waterproof performance. It doesn't matter.

  The head 104 is disposed at the proximal end of the screw 100 and is a part that engages with the fixture 202 that is a tool to fix the fixture 202 on the roof covering 301, and includes the shaft portion 103 and the flange portion 102. The larger diameter part. Further, the head 104 fixes the attachment tool 202 to the roof covering material 301 by pressing the engaging attachment 202 against the roof covering material 301 by the fastening force generated when the male screw portion 101 is screwed into the base plate 303. .

  In the present embodiment, the head 104 has a hexagonal shape that can be held by the power tool, but the shape of the head 104 is not particularly limited. Examples of the shape of the head 104 include a hexagonal hole and a thing having a groove that engages with a plus driver or a minus driver.

  The sealing portion 107 is a portion that is disposed so as to overlap the shaft portion 103 and seals between the roof covering material 301 and the shaft portion 103. The sealing portion 107 may be formed integrally with the screw 100, or the sealing portion 107 may be formed by attaching another member. In the case of the present embodiment, the sealing part 107 is formed by a separate second cylinder member 152. The second cylindrical member 152 is a cylindrical member made of a material that is flexible and has a restoring force. Specifically, it is a cylindrical member made of resin. The material of the second cylinder member 152 is not limited to resin, and the second cylinder member 152 may be formed of any material such as metal. In the case of the present embodiment, the first cylindrical member 151 that forms the flange portion 102 and the second cylindrical member 152 that forms the sealing portion 107 are integrally formed as the cylindrical member 105.

  The tubular member 105 has a length extending from the lower roof material 302 to the inside of the roof roof material 301 in a state where the male screw portion 101 is screwed into the field ground plate 303 and the screw 100 is attached to the field ground plate 303. One end portion (flange portion 102) abuts on the lower roof material 302, and a portion corresponding to the sealing portion 107 has a length inserted into a through hole provided in the roof roof material 301.

  Further, in the case of the present embodiment, the length of the cylindrical member 105 is a length from the proximal end portion of the male screw portion 101 to the head portion 104, and the through hole of the cylindrical member 105 is connected to the shaft portion 103 to be inserted. It adheres and can secure the waterproofness between the shaft part 103 and the cylindrical member 105.

  Further, the base end portion of the cylindrical member 105 (corresponding to the base end portion of the second cylindrical member 152) is provided with a diameter-enlarged portion 153 that radially expands so as to have the same diameter as the head 104. The enlarged diameter portion 153 is a portion that is sandwiched in a compressed state between the head 104 and the mounting tool 202 in the direction in which the screw 100 is screwed, and is in close contact with the head 104 and the mounting tool 202 due to the flexibility of the tubular member 105. This prevents water from penetrating between the tubular member 105 and the shaft portion 103 or between the tubular member 105 and the attachment 202.

  The cutting part 106 is a part of the blade arranged at the tip of the male screw part 101. By rotating the screw 100, the cutting part 106 can make a hole in the roof covering material 301 or the field plate 303 like a drill. Part. Due to the presence of the cutting part 106, the screw 100 functions as a drill screw. In other words, by attaching the screw 100 to an electric tool or the like and rotating it without previously drilling a hole in the roof covering material 301 or the field board 303 using a drill or the like, a hole is formed in the roof covering material 301 and the field board 303. Tapping is performed with the male screw portion 101 while opening, and the screw 100 can be screwed into the base plate 303 through the roof covering material 301 in one step.

  Next, a method of fixing the attachment tool 202 on the roof covering material 301 using the screw 100 will be described.

  FIG. 6 is a perspective view showing a state in which the attachment tool is attached to the roofing material with screws.

  First, the male screw portion 101 and the shaft portion 103 are inserted into the first cylindrical member 151 until the diameter-enlarged portion 153 of the first cylindrical member 151 contacts the head portion 104 of the screw 100.

  Next, the head portion 104 of the screw 100 is attached to an electric tool or the like, and the entire screw 100 is rotated, and the cutting portion 106 of the screw 100 is placed at a predetermined position of the roof covering material 301 through a through-hole previously opened in the fixture 202. Hit the tip. As a result, holes are opened in the roof covering material 301.

  When the roof covering material 301 is dug by the cutting portion 106, the male screw portion 101 and the roof covering material 301 come into contact with each other, and the screw 100 further advances while the male screw portion 101 taps the roof covering material 301.

  Next, when the cutting part 106 penetrates the roof gutter material 301 and reaches the lower gutter material 302, the cutting part 106 penetrates the lower gutter material 302 and further opens a hole in the base plate 303.

  Next, when the male screw portion 101 reaches the base plate 303, the male screw portion 101 advances to the back while tapping the base plate 303. At this time, the male screw portion 101 and the peripheral edge of the through hole of the lower collar material 302 may be engaged with each other, and the lower collar material 302 may be turned up.

  On the other hand, the tubular member 105 is inserted in a compressed state into the through hole of the roof covering material 301 opened by the cutting portion 106 and the male screw portion 101 while being pushed by the head portion 104 as the screw 100 advances. .

  Next, when the male thread portion 101 is screwed into the base plate 303 by a predetermined length, the flange portion 102 corresponding to the distal end portion of the tubular member 105 is turned up by the tubular member 105 by the tubular member 105 pressed by the head 104. The part is pressed in the direction of the base plate 303 and the upturn of the lower covering material 302 is restored. As described above, the lower saddle member 302 is sandwiched between the base plate 303 and the flange portion 102 of the screw 100, and the waterproof property around the base plate 303 into which the screw 100 is screwed can be improved.

  Further, the sealing portion 107 corresponding to the first cylindrical member 151 of the cylindrical member 105 seals between the shaft portion 103 and the roof covering material 301. Thereby, it can suppress that water permeates between the screw 100 and the roof covering material 301 which are arrange | positioned at the roof covering material 301 so that it may penetrate.

  On the other hand, the head 104 presses the attachment tool 202 against the roof covering material 301 and fixes the attachment tool 202 to the roof covering material 301. Furthermore, since the enlarged diameter portion 153 of the second cylindrical member 152 is disposed between the head 104 and the attachment 202 in a compressed state, it is possible to prevent water from entering the portion.

  Next, the solar cell module 201 is attached to the roof of the house 300 by using the fixture 202 attached on the roof covering material 301, and holding the frame of the solar cell module 201 on the fixture 202, so that solar power generation is possible. System 200 is formed.

  As described above, by using the above-mentioned screw, when the male screw portion 101 is screwed into the field base plate 303, the lower base material 302 that has been turned up can be pressed down, and water can invade from the part where the lower base material 302 has been turned up and the base base plate has been turned up. It is possible to avoid the occurrence of problems such as rusting 303. Therefore, a high waterproof effect can be obtained regardless of the type of roof covering material 301. That is, when the roof covering material 301 is a thin member such as a galvalume steel plate, it is difficult to fill the hole of the roof covering material 301 with a sealing material or an embedding material, but the hole portion of the lower covering material 302 is blocked by the flange portion 102. Thus, the screw 100 that enhances the waterproof effect is not affected by the type of the roof covering material 301.

  In addition, even when there is a gap between the base plate 303 (the lower roof material 302) and the roof roof material 301, the hole of the lower roof material 302 can be closed, so that high waterproof performance can be ensured.

  Furthermore, when the sealing part 107 is arrange | positioned at least between the roof covering material 301 and the shaft part 103 like this Embodiment, it is effective that water permeates from the through-hole provided in the roof covering material 301. It becomes possible to suppress, and it becomes possible to improve waterproof performance further.

  Moreover, when the cutting part 106 is provided at the tip of the screw 100 as in the case of the present embodiment, a pilot hole is made in the roof covering material 301 or the field plate 303 using the screw 100, and the screw 100 is used as it is. It can be screwed into the roof covering material 301 or the base plate 303. In addition, since the cylindrical member 105 is disposed at a predetermined position simply by screwing the screw 100 due to the flexibility of the cylindrical member 105 and the waterproof performance can be ensured, the attachment 202 can be attached to the roof covering member 301 without changing the tool. Can be fixed on top. Therefore, it is possible to reduce the labor of construction when attaching the photovoltaic power generation system 200 to the roof of the house 300.

  The present invention is not limited to the above embodiment. For example, another embodiment realized by arbitrarily combining the components described in this specification and excluding some of the components may be used as an embodiment of the present invention. In addition, the present invention includes modifications obtained by making various modifications conceivable by those skilled in the art without departing from the gist of the present invention, that is, the meaning of the words described in the claims. It is.

  For example, as shown in FIG. 7, the screw 100 may be provided integrally with the shaft portion 103 by making the diameter of the shaft portion 103 larger than the nominal diameter of the male screw portion 101 with the flange portion 102 that presses the lower brace material 302. Absent. Furthermore, a tapping male screw may be provided on the surface of the shaft portion 103. According to this, the shaft portion 103 that is maintained in a state of being inserted through the roof covering material 301 tapping the roof covering material 301, and the roof covering material 301 and the shaft portion 103 are in close contact with each other, thereby improving the waterproof performance. It becomes possible.

  Further, as shown in FIG. 8, an annular flange portion 102 may be squeezed and formed integrally between the male screw portion 101 and the shaft portion 103.

  Furthermore, the force for pressing the lower collar material 302 by the first cylinder member 151 is not only generated by the head 104 pressing the first cylinder member 151 via the second cylinder member 152, but as shown in FIG. There may be provided an engaging portion 108 that is arranged on the base end side with respect to the male screw portion 101 and that engages with the first tube member 151 and applies a force to the first tube member 151 to press down the lower collar member 302.

  Further, as shown in FIG. 10, the sealing portion 107 may be formed integrally with the shaft portion 103 by squeezing or the like, and as shown in FIG. 11, the second cylindrical member functioning as the sealing portion 107. You may attach 152 so that it may overlap with the shaft part 103. FIG.

  Moreover, when the solar cell module 201 is provided with the hole for roof attachment, etc., it is also possible to attach the solar cell module 201 directly to the roof using the screw 100. In this case, the solar cell module 201 functions as an instrument.

DESCRIPTION OF SYMBOLS 100 Screw 101 Male thread part 102 Flange part 103 Shaft part 104 Head part 107 Sealing part 108 Engagement part 151 1st cylinder member 152 2nd cylinder member 200 Solar power generation system 201 Solar cell module 202 Attachment (attachment tool)
301 Roofing material 302 Lower roofing material 303 Field plate

Claims (6)

A screw for attaching a device to a roof covering placed on a base plate covered with a waterproof bottom covering,
A male screw part screwed onto the base plate,
A flange portion that is arranged on the base end side from the male screw portion, has a larger diameter than the male screw portion, and presses down the lower brazing material,
The flange portion is arranged so that at least a part thereof overlaps, the roof covering material, and a shaft portion inserted through the appliance,
A screw provided at a proximal end portion and having a head having a diameter larger than that of the shaft portion that engages with the instrument and fixes the instrument. further,
The screw according to claim 1, further comprising: a sealing portion that is disposed so as to overlap the shaft portion and seals between the roof covering material and the shaft portion. The flange portion is
The cylindrical shape in which the shaft portion and the male screw portion can be inserted, and formed by a first cylindrical member separate from the male screw portion, the shaft portion, and the head portion. The described screw. further,
4. The screw according to claim 3, further comprising: an engaging portion that is disposed closer to the base end portion than the male screw portion, and that engages the first cylinder member and applies a force to the first cylinder member to hold down the lower collar member. . The sealing part is
The cylindrical part which can insert the said shaft part and the said external thread part, and is formed of the said 2nd cylindrical member separate from the said external thread part, the said shaft part, and the said head. screw. The screw according to any one of claims 1 to 5,
A fixture fixed on the roofing material by the screws;
A solar power generation system provided with the solar cell module fixed by the said fixture.

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