The present invention relates to a structure installation stand suitable for installing a flat plate-like structure, such as a solar cell module, on the ground or a flat roof, and a solar cell system using the same.
In conventional stands of this type, mounting bars are inclined relative to a base face such as the ground or a flat roof, and fixed in order to support a solar cell module facing the sun, and the solar cell module is supported on the inclined mounting bars. For example, as shown in
Alternatively four leg portions are arranged upright on the ground or a flat roof, the two leg portions on the front side are formed shorter than the two leg portions on the rear side, and a rectangular frame body is fixedly supported on these leg portions at an inclination. A solar cell module is mounted on this frame body so as to cause the light-receiving face of the solar cell module to substantially face in the incidence direction of sunlight (see Patent Documents 1 and 2).
Patent Document 1: JP 2000-101123A
Patent Document 2: JP H11-177115A
In cases where a flat plate-like structure such as a solar cell module is supported, since the wind pressure received by the structure is great, the structure needs to be able to sufficiently withstand not only the load of the structure itself, but also the load generated from the wind pressure.
For example, in the structure in which four leg portions are arranged upright, and a solar cell module is supported on these leg portions as in Patent Documents 1 and 2, if the load generated from the weight of the structure and wind pressure is exerted, forces in the vertical and horizontal directions are exerted on each leg portion, and thus the leg portions must be firmly supported so as to prevent these leg portions from falling over. Accordingly, it has been necessary to increase the number of bolts for fixedly supporting the leg portions and metal reinforcing fittings. However, as a result, the number of components and the number of assembly steps increased, which has led to more difficult assembly work at the job site and a rise in cost.
In contrast, the triangular structure in which the mounting bar 203, the vertical bar 204, and a base face are combined in triangular form as shown in
In order to keep the original strength of such a triangular structure sufficiently high, it is necessary to sufficiently increase, not only the strength of the mounting bar 203 and the vertical bar 204, which goes without saying, but also the strength of the joints of the mounting bar 203, the vertical bar 204, and the base blocks 201 and 202. A great force is exerted particularly on the front end portion of the mounting bar 203, and thus the joint strength of this front end portion needs to be increased.
For example, in a joining structure in which the front end portion of the mounting bar 203 is fastened to a bracket (not shown) fixed on the base block 201 side, the strength between the front end portion of the mounting bar 203 and the bracket needs to be increased. However, if the number of bolts or metal reinforcing fittings is increased to improve the strength, the number of components and the number of assembly steps will increase, which will lead to more difficult assembly work at the job site and a rise in cost, as with the case of Patent Documents 1 and 2.
There are cases where the inclination angle of the mounting bar 203 is increased in order to dispose the solar cell module 205 facing the sun. In this case, if the solar cell module 205 is simply mounted on the mounting bar 203, the solar cell module 205 slides on the mounting bar 203, and thus it will be difficult to position the solar cell module 205. Accordingly, although it is preferable to provide, for instance, a stopper for the solar cell module 205 on the mounting bar 203, the number of components and the number of assembly steps will increase by providing such a stopper, which will lead to more difficult assembly work and a rise in cost.
Moreover, if rainwater infiltrates the space between the solar cell module 205 and the mounting bar 203, this rainwater runs along the bottom face of the solar cell module and the top plate of the mounting bar 203, and gradually flows down to the front end of the mounting bar 203, and then the bracket at the front end of the mounting bar 203 and metal fittings around the bracket get wet. Such a wet state may continue for a long time, and the bracket and the metal: fittings around the bracket may become corroded, which has been a problem.
In view of this, the present invention has been conceived in light of the above conventional problems, and an object thereof is to provide a structure installation stand that is assumed to be a stand having a triangular structure, is able to increase the strength between the front end portion of a mounting bar and a bracket and readily position a solar cell module even without particularly increasing the number of components, and is further able to prevent the corrosion of the bracket and metal fittings around the bracket, and a solar cell system using the same.
In order to solve the above problems, a structure installation stand of the present invention includes a front bracket fixed onto a base face and a mounting bar on which a structure is mounted, the mounting bar being inclined relative to the base face, and a front end portion of the inclined mounting bar being fixed with the front bracket, wherein the front bracket has an abutting portion that abuts against an edge portion on an inclined lower side of the structure mounted on the inclined mounting bar.
The mounting bar and the structure are prevented from moving by the edge portion on the inclined lower side of the structure abutting against the abutting portion of the front bracket.
Moreover, the front bracket has a bottom portion that abuts against the base face, and a side wall portion that is arranged upright from the bottom portion, the side wall portion is fastened to the front end portion of the inclined mounting bar, a front edge side of the side wall portion protrudes above the front end portion of the mounting bar so as to form the abutting portion, and the abutting portion abuts against the edge portion on the inclined lower side of the structure mounted on the mounting bar.
The edge portion on the inclined lower side of the structure is positioned, by the abutting portion of the front bracket, so as to jut out beyond the bottom portion of the front bracket.
Moreover, a base rail having a hat-shaped cross section is used as a base, an open side of the hat shape of the base rail is facing upward, brim-shaped flat plate portions on both sides of the hat shape of the base rail serve as the base face, and the front bracket is fixed so as to overlap the brim-shaped flat plate portions on both sides of the hat shape on the open side of the hat shape of the base rail.
A rear bracket that is fixed onto the base face so as to be spaced apart from the front bracket, and a vertical bar that connects and joins the mounting bar to the rear bracket are provided.
In a solar cell system of the present invention, a plurality of the structure installation stands of the present invention are arranged side by side, and a solar cell module is mounted on the structure installation stands.
For example, two base rails each having a hat-shaped cross section are fixed parallel to each other, with an open side of the hat shape of the base rails facing upward, and brim-shaped flat plate portions on both sides of the hat shape of the base rails serve as a base face, the front bracket of each of the structure installation stands is fixed so as to overlap the brim-shaped flat plate portions on both sides of the hat shape of one of the base rails, the rear bracket of each of the structure installation stands is fixed so as to overlap the brim-shaped flat plate portions on both sides of the hat shape of the other base rail, and the front end portion of the inclined mounting bar of each of the structure installation stands is fastened to the front bracket, and the vertical bar is inserted and fixed between the inclined mounting bar and the rear bracket of each of the structure installation stands.
In the structure installation stand of the present invention, the front end portion of the inclined mounting bar is fixed to the front bracket. The edge portion on the inclined lower side of the structure mounted on the inclined mounting bar abuts against the abutting portion of the front bracket. Accordingly, the load exerted on the mounting bar is received not only by a fixed portion where the front end portion of the mounting bar is fixed to the front bracket, but also by the abutting portion of the front bracket against which the edge portion of the inclined lower side of the structure abuts, and thus the load is dispersively received at a plurality of locations, namely, at the fixed portion and the abutting portion. Accordingly, compared with a case where the entire load exerted on the mounting bar is received at only one location of the fixed portion where the front end portion of the mounting bar is fixed to the front bracket, the load bearing of the site where the mounting bar and the front bracket are joined improves. Moreover, the number of components and the number of assembly steps will not increase.
Since the abutting portion of the front bracket also has a function as a stopper that prevents the mounting bar and the structure from moving, it is not necessary to provide a stopper separately, which also prevents the number of components and the number of assembly steps from increasing.
For example, the front bracket has a bottom portion that abuts against the base face, and a side wall portion that is arranged upright from the bottom portion, the side wall portion is fastened to the front end portion of the inclined mounting bar, a front edge side of the side wall portion protrudes above the front end portion of the mounting bar so as to form the abutting portion, and the abutting portion abuts against the edge portion on the inclined lower side of the structure mounted on the mounting bar. Accordingly, the front bracket can be integrally provided with the abutting portion, which can prevent the number of components and the number of assembly steps from increasing.
The edge portion on the inclined lower side of the structure is positioned, by the abutting portion of the front bracket, so as to jut out beyond the bottom portion of the front bracket. In this case, even if rainwater runs along the bottom face of the structure and drops from the edge portion on the inclined lower side of the structure, this rainwater will not fall on the bottom portion of the front bracket, and thus the bottom portion of the front bracket will not easily corrode.
Furthermore, a base rail having a hat-shaped cross section is used as a base, an open side of the hat shape of the base rail is facing upward, brim-shaped flat plate portions on both sides of the hat shape of the base rail serve as the base face, and the front bracket is fixed so as to overlap the brim-shaped flat plate portions on both sides of the hat shape on the open side of the hat shape of the base rail. The base rail having a hat-shaped cross section originally has high strength against bending and does not easily deform, and thus is suitable as a base. Furthermore, if the front bracket is fixed so as to overlap the brim-shaped flat plate portions on both sides of the hat shape on the open side of the base rail, the opening portion of the hat shape is closed by the front bracket. Thus, the strength of the base rail against bending increases, and a more preferable base can be obtained.
The rear bracket that is fixed onto the base face so as to be spaced apart from the front bracket, and the vertical bar that connects and joins between the mounting bar and the rear bracket are provided, it is possible to constitute a stand having a triangular structure constituted by the mounting bar, the vertical bar, and the base face. In such a stand having a triangular structure, even if load is exerted on the mounting bar in any directions, such load can be dispersively received. Accordingly, even if the load of the structure itself and load due to wind pressure are exerted in a state in which a flat plate-like structure such as a solar cell module is mounted on the mounting bar and fixed, the stand can withstand such load.
The solar cell system of the present invention is a system in which a plurality of the structure installation stands of the present invention are arranged side by side, and a solar cell module is mounted, on the structure installation stands, and thus equivalent effects as those of the above structure installation stand of the present invention can be achieved.
For example, two base rails each having a hat-shaped cross section are fixed parallel to each other, with an open side of the hat shape of the base rails facing upward, and brim-shaped flat plate portions on both sides of the hat shape of the base rails serve as a base face, the front bracket of each of the structure installation stands is fixed so as to overlap the brim-shaped flat plate portions on both sides of the hat shape of one of the base rails, the rear bracket of each of the structure installation stands is fixed so as to overlap the brim-shaped flat plate portions on both sides of the hat shape of the other base rail, and the front end portion of the inclined mounting bar of each of the structure installation stands is fastened to the front bracket, and the vertical bar is inserted and fixed between the inclined mounting bar and the rear bracket of each of the structure installation stands. In this case, as described above, since the opening portion of the hat shape is closed by the front bracket, the strength of the base rail against bending increases, and a more preferable base can be obtained. Further, a stand having a triangular structure constituted by the mounting bar, the vertical bar, and the base face is constituted, and the load bearing of the stand improves.
The following is a detailed description of an embodiment of the present invention with reference to the accompanying drawings.
As shown in
The base rails 71 and 72 each have a hat-shaped cross section, and with the open side of the hat shape disposed facing upward, the base rails 71 and 72 are fixed on a flat roof or the like so as to be parallel to each other having a constant interval therebetween. Brim-shaped flat plate portions 71a and 72a on both sides of the hat shape of the base rails 71 and 72 are positioned on the same two-dimensional plane, and the brim-shaped flat plate portions 71a and 72a of the base rails 71 and 72 form a flat base face. The structure installation stand 10 is mounted and fixed on the brim-shaped flat plate portions 71a and 72a of the base rails 71 and 72, in other words, the flat base face.
The solar cell module 2 is provided with a solar cell panel 20 and a frame member 21 holding this solar cell panel 20.
The structure installation stand 10 has a mounting bar 11 and a vertical bar 16, and the front end of the vertical bar 16 inclined in the direction opposite to that of the mounting bar 11 is fixed at a location about one-quarter from the upper end of the obliquely inclined mounting bar 11.
The three structure installation stands 10 are arranged side by side at substantially the same intervals as the width of the solar cell nodules 2. Two solar cell modules 2 are arranged and disposed, one above the other, between the mounting bar 11 of the left structure installation stand 10 and the mounting bar 11 of the center structure installation stand 10, and two solar cell modules 2 are arranged and disposed, one above the other, between the mounting bar 11 of the right structure installation stand 10 and the mounting bar 11 of the center structure installation stand 10. The edge portions of the four solar cell modules 2 in total are mounted and attached onto the mounting bars 11 of the structure installation stands 10.
Accordingly, the edge portions of the two solar cell modules 2, one above the other, are mounted on a top plate 12 of each of the mounting bars 11 of the left and right structure installation stands 10. Further, onto the top plate 12 of the mounting bar 11 of the center structure installation stand 10, the edge portions of the two solar cell modules 2, one above the other, are mounted on the right, and the edge portions of the two solar cell modules 2, one above the other, are mounted on the left.
The following is a detailed description of a configuration of the structure installation stand 10. In the structure installation stand 10, a front bracket 73 and a rear bracket 74 are respectively fixed to the brim-shaped flat plate portions 71a and 72a of the base rails 71 and 72, a front end portion 11a of the mounting bar 11 is joined and fixed to the front bracket 73, the lower end portion of the vertical bar 16 is joined to the rear bracket 74, and the vertical bar 16 is interposed between the rear bracket 74 and a location about one-quarter from the upper end of the mounting bar 11 and fixed.
The mounting bar 11 has a substantially U-shaped cross section only at the front end portion 11a thereof, and has a hat-shaped cross section over the area from the vicinity of the front end portion 11a to the rear end. The vertical bar 16 has a substantially U-shaped cross section only at the upper end portion thereof, and has a hat-shaped cross section over the area from the vicinity of the upper end portion to the lower end. Note that in this specification, a substantially U shape is assumed to include a square U shape.
The front bracket 73, the rear bracket 74, the mounting bar 11, and the vertical bar 16 are all formed by performing cutting and bending processes on a metal plate such as a plated steel plate.
The front bracket 73 has a bottom plate 73a, side plates 73b arranged upright by being bent on both sides of the bottom plate 73a, and reinforcing portions 73d and 73e arranged to stand by being bent at the front and rear of the bottom plate 73a. Two holes 73f are formed in the bottom plate 73a of the front bracket 73, and a screw hole 73g is formed in each, of the side plates 73b.
The upper side edges of the side plates 73b each form a curved line. A top portion 73i, a shoulder portion 73j, and a valley portion 73k are formed at the upper side edge, and a curved abutting portion 73m protruding upward on the frontmost end side is further formed. The abutting portions 73m of the side plates 73b abut against the edge portion on the inclined lower side of the frame member 21 of the solar cell module 2, and receive the load of the solar cell module 2. Accordingly, the abutting portions 73m of the side plates 73b are each formed into a wide shape so as to have sufficient strength, and have a smoothly curved outer edge so as to prevent insufficient strength from locally occurring.
The front bracket 73 as described is mounted so as to span the brim-shaped flat plate portions 71a of the base rail 71. Two bolts 75 are put though respective washers 76, and further screwed into screw holes in the brim-shaped flat plate portions 71a of the base rail 71 through the respective holes 73f in the bottom plate 73a of the front bracket 73, thereby fixing the front bracket 73 onto the base face.
The base rail 71 has high strength against bending and does not readily deform since the cross section thereof has a hat shape. Moreover, the front bracket 73 is fixed so as to overlap the brim-shaped flat plate portions 71a on both sides of the hat shape on the open side of the hat shape of the base rail 71, and the opening portion of the hat shape is closed by the front bracket 73. Thus, the strength of the base rail 71 against bending is increased, and the strength of the base face is extremely increased, thereby achieving a more preferable base structure.
The front end portion 11a of the mounting bar 11 has a substantially U-shaped cross section, the inner width between side plates 11b of the front end portion 11a is set to the same width as the outer width between the side plates 73b of the front bracket 73 or a width slightly wider than that outer width. The side plates 73b of the front bracket 73 are sandwiched inside the side plates 11b of the front end portion 11a, and the side plates 11b of the front end portion 11a overlap the side plates 73b of the front bracket 73.
Then, two bolts 77 are put into respective washers 78, further screwed into the screw holes 73g in the side plates 73b of the front bracket 73 through holes (not shown) in the side plates 11b of the front end portion 11a, and fastened. Accordingly, the front end portion 11a of the mounting bar 11 is joined and fixed to the front bracket 73.
Here, the mounting bar 11 is supported at an inclination relative to the base face in order to support the solar cell module 2 facing the sun. For this reason, if the solar cell module 2 is simply mounted on the mounting bar 11, the solar cell module 2 slides on the mounting bar 11, and it will be difficult to position the solar cell module 2.
However, the abutting portions 73m of the side plates 73b of the front bracket 73 abut against the frame member 21 of the solar cell module 2, and thus the solar cell module 2 does not slide on the mounting bar 11. The abutting portions 73m of the side plates 73b receive the solar cell module 9., thereby achieving the positioning thereof.
The load of the solar cell module 2 is received not only by the front end portion 11a of the mounting bar 11 and the bolts 77 that fasten the front bracket 73, but also by the abutting portions 73m of the front bracket 73 against which the frame member 21 of the solar cell module 2 abuts, and is dispersively received at two locations, namely, at the bolts 77 and the abutting portions 73m. Accordingly, compared with the case where all the load of the solar cell module 2 is received only at one location, namely, at the bolts 77, the load bearing of the site where the mounting bar 11 and the front bracket 73 are joined improves.
The solar cell module 2 is installed outdoors, and receives wind pressure in various directions, and thus force in various directions is exerted on the front end portion 11a of the mounting bar 11. Since the abutting portions 73m of the front bracket 73 particularly receive the force in the direction toward the inclined lower side of the solar cell module 2 (water flowing direction), the load bearing in the water flowing direction between the mounting bar 11 and the front bracket 73 is improved.
Moreover, as shown in
Accordingly, the abutting portions 73m of the front bracket 73 achieve three functions at the same time, specifically, a function as a stopper for positioning the solar cell module 2, a function of improving the load bearing of the joining part between the mounting bar 11 and the front bracket 73, and a function of preventing waterdrops from falling on the bottom plate 73a of the front bracket 73 and the base rail 71. Moreover, the front bracket 73 is integrally provided with the abutting portions 73m, and thus the number of components and the number of assembly steps will not increase.
The rear bracket 74 has a bottom plate 74a, side plates 74b arranged upright by being bent on both sides of the bottom plate 74a, and reinforcing portions 74d and 74e arranged upright by being bent at the front and rear of the bottom plate 74a. Two holes 74f are formed in the bottom plate 74a of the rear bracket 74. The side plates 74b each have a screw hole 74g formed therein. Moreover, the front reinforcing portion 74d is obliquely bent at a certain position thereof, and the front edge side of the oblique portion serves as a receiving portion 74i.
In order to fix the rear bracket 74 onto the base face, the rear bracket 74 is mounted so as to span the brim-shaped flat plate portions 72a of the base rail 72, and two bolts 81 are put into respective washers 82, and further screwed into screw holes in the brim-shaped flat plate portions 72a of the base rail 72 through the holes 74f in the bottom plate 74a of the rear bracket 74.
As with the case of the front bracket 73, the rear bracket 74 closes the opening portion of the hat shape of the base rail 72, and thus the strength of the base rail 72 against bending increases, and the strength of the base structure increases.
The vertical bar 16 has a substantially U-shaped cross section only at the upper end portion thereof, and has a hat-shaped cross section over the area from the vicinity of the upper end portion to the lower end. As shown in
In this state, two bolts 83 are put into respective washers 84, further screwed into the screw holes 74g in the side plates 74b of the rear bracket 74 through holes (not shown) in the side plates 16b of the vertical bar 16, and fastened. Accordingly, the lower end portion 16a of the vertical bar 16 is joined and fixed to the rear bracket 74.
At this time, at the lower end portion 16a of the vertical bar 16, the lower sides of the side plates 16b abut against the receiving portion 74i of the reinforcing portion 74d of the rear bracket 74 and are received thereby, and thus the vertical bar 16 is supported in an inclined state relative to the base face.
As shown in
Here, if a load is exerted from the mounting bar 11 onto the vertical bar 16, the force due to this load is received not only by the two bolts 83 that fasten the lower end portion 16a of the vertical bar 16 and the rear bracket 74, but also by the receiving portion 74i of the rear bracket 74 against which the lower sides of the side plates 16b of the vertical bar 16 abut. The force can be dispersively received at a plurality of locations, namely, at the two bolts 83 and the receiving portion 74i of the rear bracket 74. Accordingly, compared with the case where only the bolts receive the force exerted on the rear bracket 74, the load bearing of the site where the vertical bar 16 and the rear bracket 74 are joined improves. Moreover, the number of components and the number of assembly steps will not increase.
The receiving portion 74i of the rear bracket 74 receives the lower sides of the side plates 16b of the vertical bar 16 from below, and thus the vertical bar 16 is prevented from rotationally moving downward about the bolts 83. Accordingly, only by joining and fixing the lower end portion 16a of the vertical bar 16 to the rear bracket 74, the vertical bar 16 can be supported in the inclined state, and when the structure installation stand 10 having a triangular structure formed by the mounting bar 11, the vertical bar 16, and the base face is set up, the assembly work therefor will be easy.
When the structure installation stand 10 having such a configuration is viewed as a whole, the mounting bar 11, the vertical bar 16, and the base face are combined to form a triangular shape. In the stand 10 constituted to have a triangular shape, the force exerted on the mounting bar 11 can be dispersively received by the mounting bar 11, the vertical bar 16, and the base face, and thus the strength of this stand 10 increases. For example, the load of the solar cell module 2 mounted on the mounting bar 11, wind pressure applied to the solar cell module 2, and the like can be dispersively received by the mounting bar 11, the vertical bar 16, and the base face.
Further, the cross section of the mounting bar 11, the vertical bar 16, and the base rail 71 that forms the base face has a hat shape, which increases the strength of each of these members.
Moreover, in the present embodiment, as described above, the load bearing of the site where the mounting bar 11 and the front bracket 73 are joined is high, and the load bearing of the site where the vertical bar 16 and the rear bracket 74 are joined is also high. Thus, even if the load exerted on the structure installation stand 10 concentrates on the joining sites thereof, the joining sites can bear this load.
The following is a description of a method for assembling the structure installation stand 10 according to the present embodiment.
First, as shown in
Then, the front bracket 73 is disposed on the brim-shaped flat plate portions 71a of the front base rail 71 so as to span the portions, and also the rear bracket 74 is disposed on the brim-shaped flat plate portions 72a of the rear base rail 72 so as to span the portions. One set of the front bracket 73 and the rear bracket 74 is arranged on a straight line orthogonal to the base rails 71 and 72, the front bracket 73 is fixed with the two bolts 75, and the rear bracket 74 is fixed with the two bolts 81 (see
Three sets of the front bracket 73 and the rear bracket 74 are disposed at constant intervals along the base rails 71 and 72.
Subsequently, as shown in
As shown in
Next, as shown in
As shown in
As shown in
In the method for assembling the structure installation stand 10 as described, when the vertical bar 16 is joined and fixed to the rear bracket 74, the vertical bar 16 is supported in an inclined state, and thus a work process step is easy in which the upper end portion 16d of the vertical bar 16 is inserted into the mounting bar 11 at a location about one-quarter from the upper end thereof so as to be joined and fixed, which enables this work process step to be performed by one person. Also, other work process steps are not particularly difficult either, and thus can be performed by one person.
Moreover, each of the structure installation stands 10 has a triangular-shaped structure, and a plurality of braces are extended aslant between the structure installation stands 10 adjacent to each other. Thus, the strength as a whole greatly increases.
The following is a schematic description of an attachment structure for attaching the edge portion of the solar cell module 2 to the mounting bar 11 of the structure installation stand 10.
As shown in
First is a description of an attachment structure for attaching the edge portion of the solar cell module 2 to the center structure installation stand 10.
As shown in
The holding portion 22 has a holding wall 22a arranged upright, and an upper holding piece 22b and a lower holding piece 22c extending from the upper and lower edges of the holding wall 22a in the same lateral direction, and has a substantially U-shaped cross section. The edge portion of the solar cell panel 20 is sandwiched inside the substantially U shape.
As shown in
The top plate hole 13 is a hole into which the bolt 8 is inserted, and is a long hole that is long and narrow in the right-left direction so as to allow fine adjustment of the insertion position of the bolt R. The positioning slit 14 is a slit into which a positioning piece 43 of the lower fixing fitting 4 that will be described below is inserted, and is a long hole that is long and narrow in the right-left direction so as to allow fine adjustment of the insertion position of the positioning piece 43 of the lower fixing fitting 4.
The pressing plate 31 is used to press, from above, the frame members 21 of the two solar cell modules 2 disposed adjacent to each other on the top plate 12 of the mounting bar 11 of the structure installation stand 10. The pressing plate hole 33 is a hole into which the bolt 8 is inserted. The protrusion pieces 32 of the upper fixing fitting 3a are inserted into the space between the right and left solar cell modules 2.
In the lower plate 50, a lower plate rear wall 50b vertically bent from the rear edge of the lower plate 50 is formed, and a lower plate front wall 50a vertically bent from the front edge of the lower plate 50 is formed. Furthermore, an engaging piece 50c vertically bent from the edge of the lower plate front wall 50a is formed.
Claw pieces 41 bent upward are formed at the right and left edges of the upper plate 40. Also, the positioning piece 43 bent downward is formed at the rear edge of the upper plate 40. Furthermore, an engagement groove 43a is formed in the positioning piece 43.
Also, an upper plate hole 42 is formed through in the center portion of the upper plate 40, and a lower plate fastening hole 51 is formed in the lower plate 50. The upper plate hole 42 in the upper plate 40 is a hole into which the bolt 8 is inserted, and the lower plate fastening hole 51 in the lower plate 50 is a screw hole into which the bolt 8 serving as a fastening member is screwed.
As shown in
As shown in
In the state in
First, as shown in
Then, as shown in
Furthermore, as shown in
In this way, in the state in which the lower fixing fitting 4 is attached to the top plate 12 in the manner described above, as shown in
The following is a description of the attachment structure for attaching the edge portions of the solar cell modules 2 to the right and left structure installation stand 10. Note that the edge portions of the solar cell modules 2 attached to the right and left structure installation stand 10 are constituted as shown in
As shown in
As in the top plate 12 of the center structure installation stand 10, a top plate hole 13 into which the bolt 8 is inserted, a T-shaped attachment aid hole 15, and a positioning slit 14 for attaching the lower fixing fitting 4 are also formed in the top plates 12 of the right and left structure installation stands 10, and the lower fixing fitting 4 is locked in the T-shaped attachment aid hole 15 and the positioning slit 14.
As shown in
In this way, the center structure installation stand 10 and the right and left structure installation stands 10 have different attachment structures for attaching the edge portion of the solar cell module 2. Note that when the two solar cell modules 2 on the lower side, one on the right and the other on the left, are mounted on the mounting bars 11 of the three structure installation stands 10, the edge portions on the inclined lower side of the two solar cell modules 2 on the lower side, one on the right and the other on the left, are brought to abut against the abutting portions 73m of the front brackets 73 of the mounting bars 11, and for each of the mounting bars 11, the edge portion of the solar cell module 2 is sandwiched between the lower fixing fitting and the upper fixing fitting and fixed. This enables three functions to be achieved at the same time, namely, as described above, a function of the abutting portions 73m of the front bracket 73 positioning the solar cell module 2 as a stopper, a function of improving the load bearing of the site where the mounting bar 11 and the front bracket 73 are joined, and a function of preventing waterdrops from falling on the bottom plate 73a of the front bracket 73 and the base rail 71.
The following is a description of another example of a solar cell system using the structure installation stand according to the above embodiment.
In this solar cell system, as shown in
The stakes 101 each have its top portion positioned approximately 30 cm above the ground GL, and the respective base rails 111 and 112 are mounted on the top portions of the stakes 101. Accordingly, the structure installation stands 10 and the solar cell modules will be separated from the ground GL by 30 cm or more. This is for preventing the solar cell modules from being in a shadow of a weed that has grown in the ground GL, a neighboring fence, or the like, or the solar cell modules from being underwater due to heavy rain or the like.
The base rails 111 and 112 each have a hat-shaped cross section, the open side of the hat shape is facing upward, a flat base face is formed by brim-shaped flat plate portions of the base rails 111 and 112, and the structure installation stands 10 are mounted on the brim-shaped flat plate portions of the base rails 111 and 112 and fixed. The length of the base rails 111 and 112 extends tens of meters. It is difficult to realize the long base rails 111 and 112 as described with a single structure, and thus a plurality of short base rails are arranged and connected so as to form a long base rail, as will be describe below.
The structure installation stands 10 are the same as those shown in
Note that a configuration may be adopted in which a stake with a shank portion having a smooth outer circumference is used instead of the stake 101, a hole is dug in the ground, the stake is set up in this hole, and concrete is poured thereinto, thereby fixing the stake.
Furthermore, the edge portions of the bottom plates 71b (or 72b) of the two base rails 71 (or 72) are respectively mounted on the brim-shaped flat plate portions 113a on both sides of the base rail connecting member 113. Both the two base rails 71 (or 72) have the long holes 71c (or 72c) in the bottom plates 71b (or 72b) overlapping the screw holes 113b in the brim-shaped flat plate portions 113a, and two bolts 122 are screwed into the screw holes 113b in the brim-shaped flat plate portions 113a through the long holes 71c (or 72c) in the bottom plates 71b (or 72b). In a temporarily clamping state in which the bolts 122 are loosened, it is possible to slide the two base rails 71 (or 72) in the lengthwise direction of the long holes 71c (or 72c), that is, in the x direction. After the positions of the two base rails 71 (or 72) in the x direction have been determined, the bolts 122 are fastened, whereby the two base rails 71 (or 72) are fixed.
Further, as shown in
Furthermore, both ends of a support bar 123 disposed in the direction orthogonal to the base rails 71 and 72 are joined and fixed in the center of the base rails 71 and 72 that are parallel to each other and form a pair.
The following is a description of the construction processes for constructing the solar cell system in
First, as shown in
As shown in
At this time, the bolts 121 are loosened in a temporarily clamping state, whereby the base rail connecting members 113 are allowed to slide in the lengthwise direction of the long holes 113d, that is, in the y direction.
The range of movement in the y direction is determined by the length of the long holes 113d in the base rail connecting members 113, and is approximately ±50 mm, for example.
As shown in
Similarly, the base rails 72 are each extended between the base rail connecting members 113 on the other line 132, and for each of the base rails 72, both end portions of the bottom plate 72b of the base rail 72 are mounted on the brim-shaped flat plate portions 113a of the respective base rail connecting members 113. Then, for both end portions of the bottom plate 72b as well, the long holes 72c in the bottom plate 72b overlap the screw holes 113b in the brim-shaped flat plate portions 113a, and the two bolts 122 are screwed into the screw holes 113b in the brim-shaped flat plate portions 113a through the long holes 72c in the bottom plate 72b.
At this time, the bolts 122 are loosened in a temporarily clamping state, whereby the edge portions of the base rails 71 and 72 are allowed to slide in the lengthwise direction of the long holes 71c and 72c, that is, in the x direction. The range of movement in the x direction is determined by the length of the long holes 71c and 72c in the base rails 71 and 72, and is approximately ±50 mm, for example.
In this state, the base rail connecting members 113 on which the edge portions of the base rails 71 and 72 are mounted are allowed to slide in the y direction, and also the edge portions of the base rails 71 and 72 are allowed to slide in the x direction. Thus, the edge portions of the base rails 71 and 72 can be moved in the x and y directions. The range of movement of the edge portions of the base rails 71 and 72 is approximately ±50 min in both the x and y directions, and is a circle range Q (shown in
As shown in
As shown in
The braces 124 are two bars that are obliquely crossed and mutually fixed. The edge portions of the braces 124 are fixed to the first and second base rails 71 (or 72), and thus the edge portions of the first and second base rails 71 (or 72) are positioned so as to butt against each other. Similarly, the edge portions of the second and third base rails 71 (or 72) are positioned so as to butt against each other.
Further, the braces 124 maintain the spaced distance between the base rails 71 and 72. The spaced distance achieved by the braces 124 is the same as the spaced distance achieved by the support bars 123. Accordingly, the first base rails 71 and 72 facing each other are parallel, and the second base rails 71 and 72 facing each other are also parallel.
In this way, after positioning the first and second base rails 71 and 72, the bolts 121 are finally tightened on both end portion sides of the base rails 71 and 72, the base rail connecting members 113 are each fixed to the flange portion 101b of the stake 101, the bolts 122 are finally tightened, and both end portions of the base rails 71 and 72 are fixed to the brim-shaped flat plate portions 113a of the base rail connecting members 113. In this way, both end portions of the first and second the base rails 71 and 72 are fixed.
Next, as shown in
Accordingly, the end portions of the third and fourth base rails 71 (or 72) are positioned so as to butt against each other. Further, the third base rails 71 and 72 facing each other are parallel, and the fourth base rails 71 and 72 facing each other are also parallel.
In this way, after positioning the third and fourth base rails 71 and 72, the bolts 121 and 122 on the sides of both end portions of the base rails 71 and 72 are tightened, whereby both end portions of the base rails 71 and 72 are fixed.
After this, the braces 124 positioned on the left of the two sets of the braces 124 are removed. The removed braces 124 are extended between the next base rails 71 and 72 in the order and fixed, and both end portions of the base rails 71 and 72 newly positioned by the braces 124 are fixed, whereby the base rails 71 and 72 are sequentially fixed.
Then, when both end portions of the last base rails 71 and 72 in the order are fixed, the braces 124 are removed. Further, the support bars 123 are left and not removed in order to reinforce the long base rails 111 and 112 as shown in
By using such processes in
After that, following the processes shown in
It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible. For example, although the cross sections of the mounting bars and vertical bars have a hat shape and a substantially U shape, the cross section may have a C shape or the like.
The present invention may be embodied in various other forms without departing from the spirit or essential characteristics thereof. Therefore, the above-described embodiments are considered in all respects as illustrative and not limiting. The scope of the invention is indicated by the appended claims rather than by the foregoing description. All variations and modifications falling within the equivalency range of the appended claims are intended to be embraced therein.
This application claims priority on Japanese Patent Application No. 2008-311260 filed in Japan on Dec. 5, 2008, the entire contents of which are incorporated herein by reference.
The present invention is applicable as a structure installation stand that is utilized in order to install a flat plate-like structure such as a solar cell module on the ground, a flat roof, or the like.
Number | Date | Country | Kind |
---|---|---|---|
2008-311260 | Dec 2008 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/JP2009/070244 | 12/2/2009 | WO | 00 | 6/6/2011 |