JP7397607B2 - PF tube fixing saddle and wiring structure - Google Patents

Description

The present invention relates to a PF tube fixing saddle for fixing a PF tube that accommodates wiring between solar cell modules, and a wiring structure between adjacent solar cell modules.

When multiple solar cell modules are installed side by side on the roof of a building, the wiring is housed in a PF tube to protect it from deterioration and water ingress, and to preserve the beauty of the building. things are being done. As shown in Figure 1A, the conventional method is to route the wiring to the fixing fitting (hind leg) for attaching the solar cell module to the roof and house the wiring in a PF tube fixed to the fixing fitting (hind leg) with wire. It is being done. Further, Patent Document 1 discloses an eaves structure in which a PF pipe containing wiring is fixed to the eaves using a saddle and a screw.

Patent No. 6495046

However, in the techniques of FIG. 1A and Patent Document 1, the wiring length needs to be long because the wiring is accommodated in the PF tube placed outside under the solar cell module. This is because wiring work is performed after the solar cell module is installed on the roof or the like, so there is not enough work space under the solar cell module to fix the PF tube with wires and screws.

Therefore, an object of the present invention is to provide a saddle for fixing a PF tube and a wiring structure for wiring between solar cell modules with a shorter wiring length.

In order to achieve the above object, the PF tube fixing saddle of the present invention is a PF tube fixing saddle for fixing a PF tube that accommodates the wiring of a solar cell module, and the saddle is for fixing a PF tube that accommodates the wiring of a solar cell module. a curved holding part formed by curving downward from the base; an insertion part inserted into the frame from the base; and an intervening part between the base and the frame. and a sheet-like electrolytic corrosion prevention packing, and the insertion portion is configured to be rotatably fixed to the frame.

Here, the insertion portion may be configured to be elastically deformable and approximately V-shaped in side view. The insertion portion may have one end connected to the base, extended into the interior of the frame, folded back and directed downward, and the other end protruding outside the frame. I can do it.

Furthermore, the wiring structure of the present invention is a wiring structure between adjacent solar cell modules, wherein the PF tube fixing saddles are each rotatably fixed to adjacent frames between the solar cell modules; It is characterized by comprising a PF tube that accommodates wiring between the solar cell modules held by a PF tube fixing saddle, and wiring that is accommodated in the PF tube.

The PF tube fixing saddle (hereinafter sometimes simply referred to as "saddle") of the present invention configured as described above can be attached to the frame of a solar cell module (hereinafter sometimes simply referred to as "frame"). By being directly attached to the lower surface, the PF tube can be easily fixed under the solar cell module, and the wiring between the solar cell modules can be connected with a shorter wiring length.

In addition, since the insertion part is rotatably fixed to the frame, the PF tube that connects the solar cell modules can be fixed at any angle, so the wiring between the solar cell modules can be connected with a shorter wiring length. can do.

Furthermore, if the insertion part is formed into an elastically deformable substantially V-shape when viewed from the side, the saddle can be easily attached to the frame with one touch by inserting the insertion part into the frame and engaging the frame. be able to.

In addition, if the insertion part has one end connected to the base and the other end protrudes outside the frame, the saddle can be removed using pliers or the like, facilitating maintenance and replacement of the PF tube.

FIG. 2 is an explanatory diagram showing the configuration of a conventional wiring structure. FIG. 2 is an explanatory diagram showing the configuration of a wiring structure according to the present embodiment. FIG. 2 is a perspective view illustrating a process of wiring between solar cell modules arranged on a roof. FIG. 2 is a diagram illustrating the configuration of a saddle for fixing a PF tube according to the present embodiment, in which (a) is a top view, (b) is a front view, and (c) is a side view. FIG. 2 is a diagram illustrating the configuration of a saddle for fixing a PF tube according to the present embodiment, in which (a) is a perspective view seen diagonally from above, and (b) is a perspective view seen diagonally from below. FIG. 3 is a cross-sectional view showing the state of the insertion portion in use, with (a) being a view when it is inserted, and (b) being a view when it is being fixed. FIG. 3 is a diagram illustrating a process of fixing a PF tube in the horizontal direction using a PF tube fixing saddle, in which (a) is a front view and (b) is a bottom view. FIG. 3 is a side view illustrating a method for fixing a PF tube in a vertical direction.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1A is an explanatory diagram showing the configuration of a conventional wiring structure between adjacent solar cell modules 1. A plurality of solar cell modules 1, . . . are arranged next to each other, and each solar cell module 1, 1 is connected by wiring 21, . These wirings 21, . . . are connected to PF tubes 22, . It is being routed through... Therefore, it is necessary to route the wiring 21, . . . to the hind legs 11b, . . . , and the wiring length must be long.

On the other hand, FIG. 1B is an explanatory diagram showing the configuration of the wiring structure of this embodiment between adjacent solar cell modules 1. A plurality of solar cell modules 1, . . . are arranged next to each other, and each solar cell module 1, 1 is connected by wiring 21, . These wirings 21, . . . are not attached to the rear legs 11b, . . . which are fixing fittings for fixing the solar cell modules 1, . It is routed through PF tubes 22, . . . which are fixed to 12, 12. Therefore, the wirings 21, . . . can be connected by short-circuiting the solar cell modules 1, 1 in the horizontal direction, and wiring with a shorter wiring length is possible.

FIG. 2 is a perspective view illustrating the process of wiring between the solar cell modules 1 arranged on the roof 3 in this embodiment. On this roof 3, a plurality of solar cell modules 1, . . . are arranged adjacent to each other vertically and horizontally. Each solar cell module 1 is fixed to a convex portion 31 of the roof 3 by fixing fittings 11 (front legs 11a, rear legs 11b) attached to the lower surface thereof. The lower surface of the solar cell module 1 and the roof 3 are separated from each other.

On the other hand, each solar cell module 1 is connected to wiring 21 for transmitting the power generated thereby. The wiring 21 is passed through a PF tube 22, which is a flexible tube made of synthetic resin, and then connected to the wiring 21 drawn out from the adjacent solar cell module 1. Next, the PF tube 22 through which the wiring 21 was passed is fixed. The saddle 4 of this embodiment is used to fix the PF tube 22 in the lateral direction (direction perpendicular to the inclination of the solar cell module 1).

As shown in FIGS. 3 and 4, this saddle 4 includes a base 41 attached to the lower surface of the frame 12 of the solar cell module 1, and a curved holding part 42 formed by curving downward from the base 41. It is mainly composed of an insertion part 43 inserted into the frame 12 from the base 41 and a sheet-shaped electrical corrosion prevention packing 44 interposed between the base 41 and the frame 12.

This base portion 41 is formed into a substantially U-shaped plate shape, and is integrally formed with a curved holding portion 42 rising from the base portion thereof. Furthermore, the insertion portion 43 has a symmetrical claw shape that protrudes from the root portion of the base portion 41 toward the inner space of the frame 12, and the middle of the claw swells to form a barb 431. There is. This insertion part 43 is inserted into the bolt hole 13 drilled in the lower surface part 121 of the frame 12, and when the edge of the bolt hole 13 and the barb 431 engage, the insertion part 43 and the saddle 4 are inserted into the frame 12. 12 so as to be rotatable.

More specifically, as shown in FIG. 5, the insertion portion 43 is formed into a substantially V-shape when viewed from the side and is elastically deformable. Therefore, the width X of the insertion part 43 when inserted (see FIG. 5(a)) is smaller than the diameter of the bolt hole 13, but the width Y of the insertion part 43 when fixed (see FIG. 5(b)) is smaller than the diameter of the bolt hole 13. It is larger than the diameter of the bolt hole 13. Therefore, the saddle 4 of this embodiment has a structure that is difficult to remove even though it is easy to attach.

Furthermore, one end of the insertion part 43 is connected to the root part of the base part 41, and the other end is extended into the interior of the frame 12 through the bolt hole 13, and is folded back and directed downward. 12 (bolt hole 13) to form a removal projection 432. Therefore, by pinching the removal protrusion 432 with pliers or the like and reducing the width of the insertion part 43, the insertion part 43 and the saddle 4 can be removed, making maintenance work such as replacing the PF tube 22 easier.

Further, as the electrical corrosion prevention packing 44, a sheet made of an insulating material such as polypropylene or polyethylene can be used. This electrical corrosion prevention packing 44 is essential only when the frame 12 and the saddle 4 are made of different metals. That is, in order to prevent electrolytic corrosion caused by contact between dissimilar metal products, the electrolytic corrosion prevention packing 44 is interposed between the base 41 and the frame 12.

FIGS. 6A and 6B are diagrams illustrating the process of fixing the PF tube 22 in the horizontal direction with the saddle 4. Both ends of the PF tube 22 through which the wiring 21 has passed are held by the curved holding parts 42, 42, and the bolt holes 13, 13 drilled in the lower surfaces 121, 121 of the adjacent frames 12, 12 are inserted. The PF tube 22 can be fixed between the solar cell modules 1 by inserting the insertion parts 43, 43 in the direction of the arrow A in FIG. 6(a) and pushing them in until a click is heard. Here, the length of the PF tube 22 that accommodates the horizontal wiring 21 may be, for example, the distance between the bolt holes 13, 13 on the lower surfaces of the adjacent frames 12, 12, plus about 50 mm on both sides. can.

Further, the PF tube 22 is fixed in the vertical direction (in the direction of inclination of the solar cell module 1) by being fixed to the fixing fitting 11 with a wire 23. FIG. 7 is a diagram illustrating a process of fixing the vertical PF tube 22 with the wire 23. By fixing both ends of the PF tube 22 through which the wiring 21 has been passed to the front legs 11a and rear legs 11b, which are the fixing fittings of the adjacent solar cell modules 1, 1, using wires 23 made of stainless steel or the like, the PF tube can be fixed. 22 can be fixed between the solar cell modules 1,1. Here, the length of the PF tube 22 that accommodates the vertical wiring 21 can be, for example, the distance between the front leg 11a and the rear leg 11b to which the PF tube 22 is fixed, plus about 50 mm on both sides.

After all the solar cell modules 1 are connected in series in this way, as shown in FIG. and wire it to joint box JB.

Next, the operation of the PF tube fixing saddle and wiring structure according to this embodiment will be explained.

The saddle 4 is configured to be directly attached to the lower surface of the frame 12 of the solar cell module 1 by being inserted into the frame 12 from the base 41 . Therefore, the PF tube 22 can be directly fixed under the solar cell module 1, and the wiring 21 between the solar cell modules 1 can be connected with a shorter wiring length.

Furthermore, the insertion portion 43 has a symmetrical claw shape that protrudes from the base portion of the base portion 41 toward the inner space of the frame 12, and the middle portion of the claw swells to form a barb 431. . When this insertion part 43 is inserted into the bolt hole 13 bored in the lower surface part 121 of the frame 12, the edge of the bolt hole 13 and the barb 431 are engaged. Thereby, the insertion portion 43 and the saddle 4 are rotatably fixed to the frame 12.

Further, the saddle 4 includes an insertion portion 43 configured to hold the PF tube 22 via a curved holding portion 42 and to be rotatably fixed to the frame 12. Therefore, since the saddle 4 can fix the PF tube 22 connecting the solar cell modules 1, 1 at any angle, the wiring 21 between the solar cell modules 1, 1 can be connected with a shorter wiring length.

In addition, when the insertion part 43 is formed into an elastically deformable substantially V-shape in side view, the saddle 4 can be attached to the frame 12 by inserting the insertion part 43 into the frame 12 and engaging the frame 12. It can be easily attached with one touch. Furthermore, if one end of the insertion part 43 is connected to the base part 41 and the other end protrudes outside the frame 12 (bolt hole 13) to form a removal protrusion 432, use pliers or the like to remove the saddle 4. It can be removed, making maintenance and replacement of the PF tube 22 easy.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention may be made. Included in invention.

For example, in the embodiment described above, a case has been described in which the wiring structure is provided on a flat roof having a convex portion 31, but the wiring structure of the present invention is not limited to this, and the wiring structure of the present invention can also be applied to a sloped roof. can.

Further, in the embodiment described above, the case where the vertical PF tube 22 is fixed using the wire 23 has been described, but the invention is not limited to this, and the lower surface portion 121 of the long side of the frame 12 is also bolted By providing the hole 13, the saddle 4 can also be applied to fixing the PF tube 22 in the vertical direction.

1 Solar cell module 11 Fixing fittings 12 Frame 21 Wiring 22 PF tube 4 Saddle 41 Base 42 Curved holding part 43 Insertion part 432 Removal protrusion 44 Electrolytic corrosion prevention packing

Claims (3)

A wiring structure between adjacent solar cell modules,
PF tube fixing saddles each rotatably fixed to adjacent frames between the solar cell modules;
a PF tube that accommodates wiring between the solar cell modules held by the PF tube fixing saddle;
Wiring accommodated in the PF tube,
The PF tube fixing saddle is
a base attached to the lower surface of the frame of the solar cell module;
a curved holding part formed by curving downward from the base;
an insertion portion inserted into the frame from the base;
a sheet-shaped electrolytic corrosion prevention packing interposed between the base and the frame,
The insertion part is configured to be rotatably fixed to the frame,
The wiring structure is characterized in that the wiring connects each of the solar cell modules by short-circuiting them in a direction perpendicular to the inclination of the solar cell modules. 2. The wiring structure according to claim 1, wherein the insertion portion is formed into a substantially V-shape when viewed from the side and is elastically deformable. The insertion part is characterized in that one end is connected to the base, extends into the interior of the frame, and the other end, which is folded back and directed downward, protrudes outside the frame. The wiring structure according to item 1 or 2.