JP2013231340A - Installation structure for solar panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation structure for a solar panel, which can secure waterproofness without use of a cap member.SOLUTION: An installation structure 100 for a solar panel includes a fixing member 6, an elastic seal member 7, and a nut 9. The fixing member 6 is installed on the surface of the solar panel P to hold the solar panel P on a roof R. A nut hole 61a is formed in the fixing member 6. The nut 9 has a tubular part 91 which is inserted through the nut hole 61a and into which a bolt 4 is to be screwed, and a flange part 92 which protrudes outward from an outside surface of one axial end of the tubular part 91. The elastic seal member 7 is provided at the peripheral edge of the nut hole 61a to seal a section between the fixing member 6 and the flange part 92. The elastic seal member 7 has a washer 8 which reduces a frictional force against the flange part 92 in a part brought into contact with the flange part 92.

Description

  The present invention relates to a solar panel installation structure.

  In recent years, with increasing interest in the global warming problem and the fossil fuel depletion problem, solar power generation that uses semi-permanent solar energy without generating carbon dioxide during power generation has attracted attention.

  Generally, a solar panel used when performing solar power generation is often installed on a roof (see, for example, Patent Document 1).

  As a method of installing the solar panel on the roof, a stationary type in which a gantry is installed on a roof material such as a tile and the solar panel is installed on the gantry, and the solar panel and the roof material are integrated. A roof material integrated type in which a solar panel is installed on a roof base material and a surface material is known. In particular, in the roof material integrated type, when water enters the roof base material, it causes water leakage, so that waterproofness is strongly demanded.

  Conventionally, there is a structure as shown in FIG. 8 as an installation structure of a solar panel integrated with a roof material. In addition, FIG. 8 is sectional drawing which shows the installation structure of the conventional solar panel.

  As shown in FIG. 8, a conventional solar panel installation structure 200 includes a support block 220 installed on a surface material 210 a of a roof 210, a base frame 230 installed on the support block 220, and an adjacent sun. A joint water-stopping member 240 that stops the joint between the light panels 260 and 260, and a fixing member 250 that is installed on the surface of the joint-water-stopping member 240 and the solar panel 260 and holds the solar panel 260 against the roof 210. And comprising. Further, holes 230a, 240a, and 250a for inserting bolts 270 are formed in the base frame 230, the joint water-stopping member 240, and the fixing member 250, respectively.

  And when installing the solar panel 260 on the roof 210, the bolt 270 is inserted into the holes 230a, 240a, 250a, and the nut 280 is screwed and tightened from the fixing member 250 side to thereby tighten the solar panel. 260 is fixed on the roof 210. Further, by covering the tip of the bolt 270 and the cap member 290 that covers the nut 280, the periphery of the hole 250a of the fixing member 250 is sealed to ensure waterproofness.

JP 07-26683 A

  However, in the conventional solar panel installation structure 200, since the cap member 290 protrudes greatly upward from the surface of the solar panel 260, the design is deteriorated, while the snow accumulated on the solar panel 260 slides down. When doing so, the cap member 290 may fall off the roof 210 together with snow.

  In addition, depending on the roof orientation, season, and time zone, the cap member 290 may make a shadow on the module, which may reduce the amount of power generation.

  The present invention was created from such a viewpoint, and an object of the present invention is to provide a solar panel installation structure that can ensure waterproofness without using a cap member.

  As a result of intensive studies to solve the above problems, the present inventors have found a structure that secures waterproofness by disposing an elastic seal member between the fixing member and the nut. As a result of further earnest research, if the frictional force between the elastic seal member and the nut is high, the elastic seal member is torsionally deformed by the tightening torque when tightening the nut to the bolt, and the fixing member rotates. It turned out that it shifted from the desired position and the solar panel could not be suitably held against the roof. Then, it came to complete this invention which can reduce frictional force, ensuring waterproofness.

  The present invention is installed on the surface of a solar panel, holds the solar panel against a base material, and is inserted into a fixing member having a hole and the hole, and a bolt is screwed therein. A nut having a cylindrical portion, and a flange portion protruding outward from an outer surface of one axial end portion of the cylindrical portion, and a fixing member and the flange portion provided on a peripheral edge of the hole portion. An elastic seal member that seals between the two, wherein the elastic seal member has a low friction portion that reduces a frictional force with the flange portion at a portion that contacts the flange portion.

  The elastic seal member is preferably made of a rubber material, and the low friction portion is preferably made of a metal material.

  According to the present invention, the elastic seal member has the low friction part that reduces the frictional force with the collar part in the part that contacts the collar part, so that the sliding property of the part that contacts the collar part of the elastic seal member is reduced. Therefore, the torsional deformation of the elastic seal member due to the tightening torque can be suppressed. Thereby, it becomes possible to hold | maintain a fixing member in a desired position, suppressing rotation of a fixing member, and can hold | maintain a solar panel suitably with respect to a base material.

  In addition, according to the present invention, since an elastic seal member can be disposed between the fixing member and the collar portion to ensure waterproofness, the conventionally used cap member can be omitted. Thereby, since the height of the part which protrudes upwards rather than the surface of a solar panel can be made low, while the designable fall can be suppressed, the problem that a cap member falls and the power generation amount fall can be eliminated.

  In the present invention, it is preferable that the elastic seal member is provided outside the low friction portion and has a first seal portion that is in pressure contact with the back surface of the flange portion.

  According to such a configuration, the first seal portion liquid-tightly seals between the elastic seal member and the back surface of the flange portion, so that moisture can enter between the elastic seal member and the back surface of the flange portion. It can suppress and by extension, it can suppress that a water | moisture content permeates into a hole. Thereby, even if it is a case where a low friction part is provided in an elastic seal member, the waterproofness between an elastic seal member and a collar part is securable.

  Further, the present invention is configured such that the first seal portion protrudes toward the flange portion and is positioned closer to the flange portion than the low friction portion in a state before the nut is fastened to the bolt. It is preferable to do this.

According to such a configuration, in the state before the nut is tightened to the bolt, the first seal portion is located on the flange side with respect to the low friction portion. Since the 1st seal part contacts the back surface of a collar part first, between the elastic seal member and the back surface of a collar part is sealed reliably, and the waterproofness between an elastic seal member and a collar part can be secured further. .
Further, since the first seal portion protrudes toward the flange portion, the first seal portion of the elastic seal member first contacts the back surface of the flange portion at the initial stage of tightening the nut. It is possible to reduce the contact area with the back surface of the nut, and it is possible to reduce the frictional force between the elastic seal member and the back surface of the flange portion in the initial stage of tightening the nut.

  Further, the present invention is configured such that the elastic seal member has a second seal portion that is provided outside the low friction portion, protrudes toward the flange portion, and presses against the outer surface of the flange portion. Is preferred.

  According to such a configuration, the second seal portion provides a liquid-tight seal between the elastic seal member and the outer surface of the collar portion, so that moisture enters between the elastic seal member and the outer surface of the collar portion. This can further suppress the intrusion of moisture into the hole. Thereby, even if it is a case where a low friction part is provided in an elastic seal member, the waterproofness between an elastic seal member and a collar part can be secured further.

  ADVANTAGE OF THE INVENTION According to this invention, the installation structure of the solar panel which can ensure waterproofness can be provided, without using a cap member.

It is a perspective view which shows the state which installed the solar panel on the roof. It is the II sectional view taken on the line of FIG. 1 which shows the installation structure of the solar panel which concerns on embodiment of this invention. It is a partial expanded sectional view which shows the state before nut fastening. It is a partial expanded sectional view which shows the state after nut fastening. It is a perspective view which shows the process of installing a support block and a base frame in a roof. It is a perspective view which shows the process of installing a solar panel in a base frame. (A) is a partial expanded sectional view which shows the installation structure of the solar panel which concerns on the modification of this invention, (b) is the part which shows the installation structure of the solar panel which concerns on the other modification of this invention It is an expanded sectional view. It is sectional drawing which shows the installation structure of the conventional solar panel.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In this embodiment, a case where a solar panel is installed on a sloped roof will be described as an example. In the following description, the gradient direction of the roof is referred to as “gradient direction X”, and the direction orthogonal to the gradient direction X is referred to as “orthogonal direction Y”.

  As shown in FIG. 1, a plurality of solar panels P are installed on a roof (base material) R along the gradient direction X and the orthogonal direction Y. The solar panel P has a rectangular shape and is installed sideways so that the longitudinal direction is along the orthogonal direction Y. The plurality of solar panels P, P are provided at a predetermined interval from each other, and a joint J extending along the gradient direction X and the orthogonal direction Y between the adjacent solar panels P, P is provided. Is formed (see FIG. 6). A plurality of roof materials Ra such as tiles are installed around the solar panel P, for example.

  In addition, although the solar panel P of this embodiment is comprised by the solar power generation panel provided with the power generation cell Pb (refer FIG. 2) used as a light-receiving surface on the surface, this invention is not limited to this. For example, it may be configured by a solar hot water supply panel that obtains hot water with the thermal energy of sunlight, or may be configured by a hybrid solar panel that has both the function of the solar power generation panel and the function of the solar hot water supply panel.

  Next, the solar panel installation structure 100 according to the embodiment of the present invention will be described in detail with reference to FIGS. 2 to 6 as appropriate.

  As shown in FIG. 2, the solar panel installation structure 100 includes a support block 1, a base frame 2, a ground plate 3, a bolt 4, a joint water-stopping member 5, a fixing member 6, and an elastic seal member. 7, a washer 8, and a nut 9 are mainly provided.

<Support block>
A plurality of the support blocks 1 are installed on the surface material Rb of the roof R via the elastic sealing material 10. As shown in FIG. 5, the support block 1 is installed below the both ends in the longitudinal direction and the middle part of the base frame 2.

<Base frame>
As shown in FIG. 5, the base frame 2 extends along the orthogonal direction Y, and a plurality of base frames 2 are installed along the gradient direction X with a predetermined interval. As shown in FIG. 2, the base frame 2 is a member for placing the solar panel P, and bends a plate made of aluminum or stainless steel, a steel plate subjected to rust prevention treatment, or the like. Is formed. The base frame 2 is provided at the intermediate portion in the width direction of the base frame 2, and is formed to protrude upward and outward in the width direction from both lower ends of the protrusion 21. A pair of support portions 22, 22.

  The protruding portion 21 is a portion having a U-shape when viewed in a longitudinal section. A bolt hole 21 a for inserting the bolt 4 is formed through the upper surface of the protrusion 21. As shown in FIG. 5, the bolt hole 21 a is formed in a long hole shape extending in the longitudinal direction of the base frame 2.

  As shown in FIG. 2, the support portion 22 is a portion that has a hat shape when viewed in a longitudinal section and supports the solar panel P from below. The support portion 22 is provided at a predetermined interval in the width direction, and connects the pair of flange portions 22a and 22a contacting the lower surface of the edge portion Pa of the solar panel P and the pair of flange portions 22a and 22a downward. And a U-shaped protruding portion 22b as viewed in a longitudinal section.

  The protrusion 22b plays the role of a reinforcing rib. A screw hole 22c for inserting the screw S is formed through the bottom surface (lower surface) of the protruding portion 22b. The bottom surface of the protruding portion 22 b is in contact with the upper surface of the support block 1 via the ground plate 3.

<Earth plate>
As shown in FIG. 2, the earth plate 3 is a metal member that has a crank shape (Z-shape) in a longitudinal section and is interposed between the support block 1 and the base frame 2. The ground plate 3 has a main body 31 extending along the upper surface of the support block 1 and a flange 32 that extends upward from one end in the width direction of the main body 31 and contacts the side surface of the protrusion 22 b of the support 22. And a flange portion 33 that extends downward from the other widthwise end of the main body 31 and contacts the side surface of the support block 1. On both sides in the width direction of the main body 31, screw holes 31 a for inserting screws S are formed so as to penetrate therethrough.

  In this case, the screw S is inserted from above the screw holes 22c and 31a, penetrates through the support block 1 and the surface material Rb of the roof R, and is screwed into the roof base material Rc such as a rafter, thereby supporting the support block 1, The base frame 2 and the ground plate 3 are fixed to the roof R.

<Bolt>
The bolt 4 is appropriately selected from known bolts. As shown in FIG. 2, the bolt 4 of the present embodiment is configured by a so-called seated bolt including a washer 42. The head 41 and the washer 42 of the bolt 4 are arranged in a space formed between the pair of support portions 22 and 22 and below the protrusion 21. In this space, a bolt receiving member 11 for preventing the bolt 4 from being lowered is provided. The upper surface of the bolt receiving member 11 is in contact with the lower surface of the flange portion 22 a located on the inner side in the width direction of the support portion 22, and the lower surface is in contact with the upper surface of the main body portion 31 of the earth plate 3.

  A spring washer 12 and a washer 13 are mounted on the outer peripheral surface of the bolt 4 on the washer 42 side. The spring washer 12 plays a role of suppressing loosening of the bolt 4. The shaft portion 43 is inserted into the bolt hole 21a of the base frame 2 and protrudes upward from the bolt hole 21a. An O-ring 14 is mounted on the outer peripheral surface in the vicinity of the bolt hole 21a in the protruding portion of the shaft portion 43. The O-ring 14 is in contact with the opening edge of the bolt hole 21a and functions as a temporary fixing member for the bolt 4 until the nut 9 is tightened as will be described later.

  In the present embodiment, the distal end portion of the shaft portion 43 is positioned below the surface of the solar panel P, and the distal end portion of the cylindrical portion 91 of the nut 9 described later is lower than the surface of the solar panel P. Is located. That is, the nut 9 is screwed into the bolt 4 below the surface of the solar panel P (in the joint J). Thereby, even if the thickness of the solar panel P is changed, the screwing amount of the nut 9 can be adjusted in the joint J, and the shaft portion 43 protrudes from the surface of the solar panel P. It can prevent and can improve the designability. Moreover, in this embodiment, while the volt | bolt 4 has the axial part 43 and the nut 9 has the cylindrical part 91, compared with the conventional structure (refer FIG. 8) which comprised only the volt | bolt which has an axial part, It can correspond to solar panels P of various thicknesses.

<Seamless member>
As shown in FIG. 2, the joint water-stopping member 5 is a member that stops the joint J. The joint water-stopping member 5 includes a cover member 51 that covers the joint J from above, and an elastic sealing material 52 that is interposed between the cover member 51 and the solar panel P.

  The cover member 51 is formed by bending an aluminum or stainless steel plate, a steel plate subjected to rust prevention treatment, or the like. As shown in FIG. 3, the cover member 51 is composed of a surface portion 51a and an insertion portion 51b. In the present embodiment, the surface portion 51a and the insertion portion 51b are integrally formed by bending a single plate. However, the surface portion 51a and the insertion portion 51b may be integrally formed. The insertion part 51b may be formed separately and the insertion part 51b may be fixed to the surface part 51a.

  The surface portion 51 a is a plate-like portion extending along the joint J. Both end portions in the width direction of the surface portion 51a cover the upper surfaces of the edge portions Pa and Pa of the solar panels P and P located on both sides of the joint J together with the joint J from above. A nut hole 51c through which a cylindrical portion 91 of the nut 9 described later is inserted is formed in the intermediate portion in the width direction of the surface portion 51a.

  The insertion portion 51b is a portion that protrudes from the lower surface of the surface portion 51a and is inserted into the joint J. The insertion portion 51b is composed of a pair of plates that are orthogonal to the surface portion 51a and spaced apart by a predetermined distance in the width direction. The insertion portion 51b is formed such that the outer side surface (the surface facing the side surface of the edge portion Pa of the solar panel P) is spaced from the side surface of the solar panel P by a predetermined distance. The space | interval of the solar panel P and the insertion part 51b is set to the dimension by which the elastic sealing material 52 is compressed by moderate stress.

  The elastic sealing material 52 is made of rubber or resin having elasticity and extends along the longitudinal direction of the cover member 51. The elastic seal material 52 is fixed by an adhesive in contact with both the lower surface of the surface portion 51a and the side surface of the insertion portion 51b. The elastic sealing material 52 is pressed by the surface and side surface of the edge portion Pa of the solar panel P in a state where the joint water-stopping member 5 is attached to the joint J. Thereby, the elastic sealing material 52 has two sealing surfaces, a sealing surface formed in contact with the surface of the edge portion Pa of the solar panel P and a sealing surface formed in contact with the side surface of the edge portion Pa. It will have.

<Fixing member>
As shown in FIGS. 3 and 4, the fixing member 6 has a hat shape as viewed in a longitudinal section, and is a member that holds the solar panel P against the roof R. The fixing member 6 is formed by bending an aluminum or stainless steel plate, a steel plate subjected to rust prevention treatment, or the like. The fixing member 6 is a pair of a main body 61 that is installed on the upper side of the joint water-stopping member 5 and a pair that extends downward from both widthwise ends of the main body 61 and contacts the surface of the edge portion Pa of the solar panel P. The abutting portions 62, 62 are configured. A nut hole (hole) 61 a for inserting the nut 9 is formed through the intermediate portion in the width direction of the main body portion 61.

  In the present embodiment, an elastic sealing material 15 made of rubber or resin having elasticity is provided between the joint water-stopping member 5 and the fixing member 6. The elastic sealing material 15 is fixed by an adhesive in contact with both the lower surface of the main body portion 61 and the inner surface of the contact portion 62. The elastic sealing material 15 is pressed against the upper surface and the side surface of the surface portion 51 a of the joint water-stopping member 5 in a state where the fixing member 6 is installed on the joint-water-stopping member 5 and the nut 9 is screwed onto the bolt 4. It is configured as follows.

<Elastic seal member, washer>
As shown in FIGS. 3 and 4, the elastic seal member 7 is an annular member that is provided at the periphery of the nut hole 61 a and seals between the fixing member 6 and the flange portion 92 of the nut 9. The elastic seal member 7 is made of rubber having elasticity. On the upper inner peripheral surface of the elastic seal member 7, an annular stepped portion 71 having a diameter increased by a predetermined length as compared with other portions is formed. In other words, the stepped portion 71 is formed by notching the inner peripheral edge of the upper surface (surface) 7a of the elastic seal member 7 downward by a predetermined length. An annular washer 8 is disposed on the stepped portion 71.

  The washer 8 is vulcanized and bonded to the elastic seal member 7 and is made of a metal material having a lower friction coefficient than the elastic seal member 7. In the present embodiment, the washer 8 constitutes a “low friction portion” in the claims. Since the elastic seal member 7 has the washer 8, the slipperiness of the portion in contact with the flange 92 can be improved, so that the torsional deformation of the elastic seal member 7 due to the tightening torque can be suppressed. The washer 8 may be fixed to the elastic seal member 7 by a method other than vulcanization adhesion.

  In addition, a first seal portion 72 and a second seal portion 73 are formed on a portion of the upper surface 7 a of the elastic seal member 7 that is radially outward from the step portion 71 (washer 8).

  The first seal portion 72 is an annular ridge portion that is in pressure contact with the lower surface (back surface) 92 a of the flange portion 92 of the nut 9. The first seal portion 72 is formed so as to protrude from the upper surface 7a of the elastic seal member 7 upward (toward the flange portion 92) by a predetermined length. The first seal portion 72 is located closer to the flange portion 92 than the washer 8 in a state before the nut 9 is fastened to the bolt 4. As shown in FIGS. 3 and 4, the first seal portion 72 is configured to be elastically deformed so as to shrink downward in a state where the nut 9 is fastened to the bolt 4, and to press-contact with the lower surface 92 a of the flange portion 92. ing. Thereby, since the space between the elastic seal member 7 and the lower surface 92a of the flange portion 92 is liquid-tightly sealed, waterproofness between the two can be ensured.

  The second seal portion 73 is an annular portion that is in pressure contact with the outer side surface 92 b of the flange portion 92 of the nut 9. The second seal portion 73 is formed to protrude upward from the outer peripheral edge of the upper surface 7a of the elastic seal member 7 by a predetermined length. The second seal portion 73 is formed so that the inner diameter thereof is larger than the outer diameter of the flange portion 92 and is spaced from the outer surface 92b of the flange portion 92 by a predetermined distance.

  In this case, as shown in FIGS. 3 and 4, when the nut 9 is fastened to the bolt 4, the elastic seal member 7 is elastically deformed so that the portion excluding the second seal portion 73 is contracted downward. Accordingly, the second seal portion 73 tilts inward in the radial direction, and the upper side of the second seal portion 73 comes into pressure contact with the outer side surface 92 b of the flange portion 92. Thereby, since the space between the elastic seal member 7 and the outer side surface 92b of the flange portion 92 is liquid-tightly sealed, the waterproofness between the two can be further ensured.

<Nut>
As shown in FIGS. 3 and 4, the nut 9 is a so-called cap nut formed in a bag shape so as to cover the tip end portion of the shaft portion 43 of the bolt 4 from the outside. The nut 9 has a bottomed cylindrical tubular portion 91 into which the bolt 4 is screwed, and a flange 92 extending radially outward from the outer peripheral surface of one axial end portion of the tubular portion 91. .

  The tubular portion 91 is a portion that is inserted through the elastic seal member 7, the nut hole 61 a of the fixing member 6, and the nut hole 51 c of the joint water-stopping member 5. The outer diameter of the flange 92 is formed larger than the inner diameter of the elastic seal member 7 and the inner diameter of the nut hole 61 a of the fixing member 6. The flange portion 92 is disposed on the first seal portion 72 and the washer 8 and is disposed on the radially inner side of the second seal portion 73.

  In the present embodiment, as shown in FIG. 2, the edge portion Pa of the solar panel P is sandwiched between the base frame 2, the joint water-stopping member 5, and the fixing member 6, and is sandwiched up and down. The solar panel P is fixed on the roof R by screwing and tightening the cylindrical portion 91 of the nut 9 to the shaft portion 43 of the bolt 4 protruding from 21a.

  The solar panel installation structure 100 according to the present embodiment is basically configured as described above. Next, referring to FIGS. 1 to 6 as appropriate, the solar panel P installation procedure and The effect of this embodiment is demonstrated. FIG. 5 is a perspective view showing a process of installing the support block and the base frame on the roof, and FIG. 6 is a perspective view showing a process of installing the solar panel on the base frame.

  First, as shown in FIG. 5, after the support block 1 is installed on the roof R, the ground plate 3 and the base frame 2 are placed on the support block 1 and fixed with screws S.

  At this time, the support blocks 1 are installed at both ends and an intermediate portion of the base frame 2 in the longitudinal direction. The base frame 2 is sequentially installed from the lower side of the gradient direction X, and the base frames 2 and 2 are installed so as to be separated from each other by a predetermined interval.

  Furthermore, as shown in the partially enlarged view of FIG. 5, the bolt 4 is inserted into the bolt hole 21a of the base frame 2 from below, and the shaft portion 43 protrudes upward. Then, the O-ring 14 is attached to the shaft portion 43, and the O-ring 14 is brought into contact with the opening edge of the bolt hole 21 a of the base frame 2 to temporarily fix the bolt 4 to the base frame 2. The O-ring 14 may be removed immediately before the nut 9 is tightened, or may be left as it is.

  Subsequently, after the base frame 2 is installed, the solar panels P are sequentially installed from below as shown in FIG.

  At this time, as shown in FIG. 2, the solar panel P is placed by bringing the lower surface of the edge portion Pa into contact with the upper surface of the flange portion 22 a of the support portion 22, and the edge on the side surface of the ridge portion 21. The solar panel P is locked by bringing the side surface of the part Pa into contact.

  By installing the solar panel P in this way, between the solar panels P and P (solar panels P and P adjacent to each other along the gradient direction X) installed so as to sandwich the ridge 21. As shown in FIG. 6, a joint J extending along the orthogonal direction Y (hereinafter, sometimes referred to as “horizontal joint Ja”) is formed.

  On the other hand, when installing the solar panels P along the orthogonal direction Y, the solar panels P and P adjacent to each other along the orthogonal direction Y are arranged as shown in FIG. As shown, a joint J extending along the gradient direction X (hereinafter sometimes referred to as “longitudinal joint Jb”) is formed.

  Subsequently, after installing the solar panel P, the joint water-stopping member 5 is inserted into the joint J as shown in FIG.

  At this time, the joint water-stopping member 5 is attached to the base frame 2 so that the shaft portion 43 of the bolt 4 projecting upward from the bolt hole 21a of the base frame 2 and the nut hole 51c of the joint joint water-stopping member 5 overlap vertically. Install upward.

  Then, the joint water stop member 5 is pushed into the joint J to some extent by hand. In addition, since the joint water-stopping member 5 is temporarily fixed to the solar panel P due to the adhesiveness (frictional force) of the elastic sealing material 52, the nut 9 can be tightened smoothly. it can.

  Subsequently, after the joint water-stopping member 5 is installed, the fixing member 6 is installed on the joint-water-stopping member 5 as shown in FIG.

  At this time, the fixing member 6 is installed on the joint water-stopping member 5 so that the nut hole 51c of the joint-water-stopping member 5 and the nut hole 61a of the fixing member 6 overlap each other vertically.

  Incidentally, in this embodiment, as shown in FIGS. 1 and 6, the joint water-stopping member 5 (hereinafter, referred to as “vertical joint water-stopping member 5a”) attached to the vertical joint Jb is formed on the entire length of the vertical joint Jb. The joint water-stopping member 5 (hereinafter, referred to as “horizontal joint water-stopping member 5b”), which is composed of a single piece extending over and attached to the horizontal joint Ja, is divided so as to correspond to the number of solar panels P. Configured. Further, the vertical joint water-stopping member 5 a does not have a nut hole and is connected to the horizontal joint water-stopping member 5 b via the fixing member 6. That is, the vertical joint waterproof member 5a is fixed on the roof R by using a fastening force acting on the fixing member 6 and the horizontal joint waterproof member 5b. In addition, as shown in FIG. 1, the fixing member 6 is installed above the longitudinal direction both ends (intersection part with the vertical joint waterproofing member 5a) and the intermediate part of the horizontal joint waterproofing member 5b.

  Subsequently, after the fixing member 6 is installed, the elastic seal member 7 to which the washer 8 is vulcanized and bonded is installed on the fixing member 6 as shown in FIG. 3 and 4, the cylindrical portion 91 of the nut 9 is inserted into the nut holes 61a and 51c and screwed into the shaft portion 43 of the bolt 4 to be tightened, and the top surface of the elastic seal member 7 7a and the washer portion 92 of the nut 9 are placed on the upper surface of the washer 8.

  At this time, the elastic seal member 7 of the present embodiment is in contact with the flange portion 92 by having the washer 8 that reduces the frictional force with the flange portion 92 at the contact portion of the nut 9 with the flange portion 92. Therefore, the torsional deformation of the elastic seal member 7 due to the tightening torque can be suppressed. Thereby, it becomes possible to hold | maintain the fixing member 6 in a desired position by suppressing rotation of the fixing member 6, and can hold | maintain the solar panel P suitably with respect to the roof R top.

  In particular, in the present embodiment, since the first seal portion 72 protrudes toward the flange portion 92, the first seal portion 72 of the elastic seal member 7 is placed on the lower surface 92 a of the flange portion 92 at the initial stage of tightening of the nut 9. Since the contact is made first, it is possible to reduce the contact area between the elastic seal member 7 and the lower surface 92a of the flange portion 92, and the frictional force between the elastic seal member 7 and the lower surface 92a of the flange portion 92 in the initial tightening of the nut 9. Can be reduced.

  Further, the first sealing portion 72 is elastically deformed so as to be contracted downward by the tightening force that is applied when the nut 9 is tightened to the bolt 4, and is pressed against the lower surface 92 a of the flange portion 92. The space between the lower surface 92a of the flange 92 is sealed in a liquid-tight manner. Therefore, it is possible to suppress moisture from entering between the elastic seal member 7 and the lower surface 92 a of the flange 92, and consequently to prevent moisture from entering the nut hole 61 a of the fixing member 6. Thereby, even if it is a case where the washer 8 is provided in the elastic seal member 7, the waterproofness between the elastic seal member 7 and the collar part 92 is securable.

  In particular, in this embodiment, when the nut 9 is fastened to the bolt 4 because the first seal portion 72 is positioned on the flange 92 side of the washer 8 before the nut 9 is fastened to the bolt 4. Since the first seal portion 72 comes into contact with the lower surface 92a of the flange portion 92 before the washer 8, the space between the elastic seal member 7 and the lower surface 92a of the flange portion 92 is reliably sealed. The waterproofness between the portions 92 can be further ensured.

  Further, due to the tightening force acting when the nut 9 is tightened on the bolt 4, the elastic seal member 7 is elastically deformed so that the portion excluding the second seal portion 73 is contracted downward. 2 The seal part 73 tilts inward in the radial direction, and the upper side of the second seal part 73 is in pressure contact with the outer side surface 92b of the flange part 92. It will be sealed. Therefore, it is possible to suppress moisture from entering between the elastic seal member 7 and the outer side surface 92b of the flange portion 92, and further suppress moisture from entering the nut hole 61a of the fixing member 6. Thereby, even if it is a case where the washer 8 is provided in the elastic seal member 7, the waterproofness between the elastic seal member 7 and the collar part 92 can be ensured further.

  Incidentally, the lower surface of the elastic seal member 7 is pressed against the upper surface of the fixing member 6 by the tightening force that is applied when the nut 9 is tightened to the bolt 4, so that the elastic seal member 7 is not in contact with the fixing member 6. Will be sealed in a liquid-tight manner. Therefore, it is possible to suppress moisture from entering between the elastic seal member 7 and the fixing member 6, and consequently to prevent moisture from entering the nut hole 61 a of the fixing member 6. Thereby, the waterproofness between the elastic seal member 7 and the fixing member 6 can also be secured.

  Furthermore, in the present embodiment, the elastic seal member 7 can be disposed between the fixing member 6 and the flange portion 92 to ensure waterproofness, so that a cap member that has been conventionally used can be omitted. Thereby, since the height of the part which protrudes upwards rather than the surface of the solar panel P can be made low, while the designable fall can be suppressed, the problem that a cap member falls and the electric power generation fall can be eliminated.

  As mentioned above, although embodiment of this invention was described in detail with reference to drawings, this invention is not limited to this, In the range which does not deviate from the main point of invention, it can change suitably.

  Although the solar panel P of this embodiment is installed sideways so that the longitudinal direction is along the orthogonal direction Y, the present invention is not limited to this, and the longitudinal direction is along the gradient direction X. It may be installed vertically.

  In this embodiment, the washer 8 constitutes a low friction portion, but the present invention is not limited to this, and for example, on the portion of the upper surface 7a of the elastic seal member 7 that contacts the flange 92. The arranged (applied) lubricant may constitute the low friction portion. Moreover, the lubricant contained in the part which contacts the collar part 92 among the elastic seal members 7 may comprise a low friction part. In this case, when the tightening force is applied, the lubricant is exposed to a portion of the upper surface 7 a of the elastic seal member 7 that contacts the flange 92. In addition, the low friction part is comprised by combining the lubricant arrange | positioned in the part which contacts the collar part 92 among the upper surfaces 7a of the elastic seal member 7, and the lubricant contained in the part which contacts the collar part 92. Also good.

  In the present embodiment, the single first seal portion 72 is formed. However, the present invention is not limited to this, and a plurality of first seal portions 72, 72 are provided as shown in FIG. They may be formed spaced apart by a predetermined distance in the radial direction. In this way, the plurality of first seal portions 72, 72 are pressed against the lower surface 92 a of the flange portion 92 and can be waterproofed in a plurality of stages between the elastic seal member 7 and the lower surface 92 a of the nut 9. The waterproofness between the nut 9 and the nut 9 can be further secured.

  In the present embodiment, the first seal portion 72 is formed to protrude upward from the upper surface 7a of the elastic seal member 7, but the present invention is not limited to this, as shown in FIG. 7 (b). Alternatively, a plurality of locations on the upper surface 7a of the elastic seal member 7 may be cut downward. In other words, the peak portions 74 and the valley portions 75 may be formed alternately and continuously, and the peak portions 74 may be used as the first seal portion 72. In this way, the plurality of peak portions 74, 74 are pressed against the lower surface 92 a of the flange 92, and can be waterproofed in a plurality of stages between the elastic seal member 7 and the lower surface 92 a of the nut 9, so that the elastic seal member 7 and the nut The waterproofness between 9 can be further secured.

  Although the nut 9 of the present embodiment is configured by a so-called cap nut, the present invention is not limited to this, and may be appropriately selected from known nuts.

  In the present embodiment, the bolt 4 is temporarily fixed to the base frame 2 using the O-ring 14, but the present invention is not limited to this, and for example, the base frame 2 using a bolt jig or the like. The bolt 4 may be temporarily fixed to the bolt. In this case, the bolt jig is removed immediately before the nut 9 is tightened.

100 Solar panel installation structure P Solar panel R Roof (base material)
4 Bolt 6 Fixing member 61a Nut hole (hole)
7 Elastic seal member 7a Upper surface 71 Step portion 72 First seal portion 73 Second seal portion 8 Washer (low friction portion)
9 Nut 91 Cylindrical part 92 Gutter part 92a Bottom face (back face)
92b outer surface

Claims (5)

A fixing member that is installed on the surface of the solar panel, holds the solar panel against the substrate, and has a hole formed therein.
A nut having a cylindrical portion inserted through the hole and screwed into a bolt therein, and a flange protruding outward from the outer surface of one axial end of the cylindrical portion;
An elastic seal member that is provided at a peripheral edge of the hole portion and seals between the fixing member and the flange portion;
The solar panel installation structure according to claim 1, wherein the elastic seal member has a low friction portion that reduces a frictional force with the flange portion at a portion in contact with the flange portion.   2. The solar panel installation structure according to claim 1, wherein the elastic seal member includes a first seal portion that is provided outside the low friction portion and press-contacts the back surface of the flange portion.   The said 1st seal | sticker part protrudes to the said collar part side, and is located in the said collar part side rather than the said low friction part in the state before tightening the said nut to the said bolt. The solar panel installation structure described.   The elastic seal member is provided outside the low friction portion, and has a second seal portion that protrudes toward the flange portion and presses against an outer surface of the flange portion. The installation structure of the solar panel as described in any one of claim | item 3. The elastic seal member is made of a rubber material,
The said low friction part is comprised with the metal material, The installation structure of the solar panel as described in any one of Claim 1 thru | or 4 characterized by the above-mentioned.

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