WO2017013241A1

WO2017013241A1 - Device for fastening pv modules to profiles

Info

Publication number: WO2017013241A1
Application number: PCT/EP2016/067504
Authority: WO
Inventors: Marco Göbel
Original assignee: Montagebau Karl Göbel E.K.
Priority date: 2015-07-22
Filing date: 2016-07-22
Publication date: 2017-01-26
Also published as: EP3325897A1; DE102015111880B4; DE102015111880A1

Abstract

The invention relates to an assembly system (1) for fastening and bearing solar modules (50, 51) on a substructure, comprising at least one longitudinal bearing profile (10) and at least one installation adapter (20) for clamping installation on the longitudinal bearing profile (10), wherein the installation adapter (20) has a clamping section (21) which can be expanded from a clamping position to an installation position, formed from a first limb (22) having a clamping arm (22.1), a second limb (23) having a clamping arm (23.1) and an intermediate section (24) connecting the two limbs (22, 23), and wherein the longitudinal bearing profile (10) forms a profile limb (11) for removable clamping fastening of the installation adapter (20) by means of the clamping section (21).

Description

Device for fixing PV modules to profiles

Description:

The present invention relates to a mounting system for mounting solar modules on a substructure and a mounting method. The use of solar modules to generate electricity has become increasingly important in recent years, in the face of rising energy prices and dwindling non-renewable resources. Significant efforts have been made to make solar installations economically viable in order to be able to carry out installations of large outdoor installations efficiently and therefore quickly and reliably. For economical use, however, it is necessary that solar modules can be set up with the least possible technical effort at suitable locations and installed there effectively. As is known, solar modules are often mounted on substructures in the field, so that solar radiation can impinge unhindered on the solar cell.

Most mounting systems consist of several or even a large number of components, which on the one hand have to be connected to the substructure and, on the other hand, to one another and therefore require complex material coordination. So usually running in the longitudinal direction carrier are bolted to the substructure. Then brackets are attached to the carrier and the solar modules with suitable fasteners. In addition to the material costs for the substructure and the assembly means, the assembly costs play a significant role, in particular due to the variety of products. A major disadvantage in the production of such solar systems, especially of large-scale ground-based outdoor facilities is due to the fact that there are a variety of different PV modules of the various module manufacturers, resulting in a corresponding installation diversity and planning effort.

Thus, adapted to the modular form substructures and corresponding components must be planned and prefabricated, which come later in carrying out the assembly with the appropriate modules used.

Even if the modules of different sizes, sometimes only slightly differ in their width dimension, this adapted side members are required with a matching mounting grid. Since the side members are therefore also only slightly visible in the mounting grid and visually hardly recognizable. can divide, it can lead to the faulty parts selection of z. B. longitudinal beams come, the error is sometimes detected later in the assembly during assembly. In addition to the mentioned disadvantage of high variety of parts and the possibility of confusion, further problems arise. So it happens again and again that the exact PV module type is not yet established during the planning and project planning of solar plants or changes again later during the project planning phase.

In order to reduce the variety of parts, it has been provided in the prior art that in the longitudinal members (ie longitudinal beams of the substructure) instead of a fixed adapted to a specific module width mounting grid, slots are provided in a defined pitch to mount various types of modules with slightly different width dimension to be able to.

A disadvantage of such a solution is the fact that still depends on the module width, always after a certain number of assembled modules results in a mounting problem. Is the selected module z. B. slightly wider, such as the intended pitch of the slots, the next mounting position moves with each module further mounted a bit further to the edge region of the respective slot. After the assembly of the x-th module, one then reaches the outermost edge of the relevant slot, so that another module can not be mounted next to it in the longitudinal direction.

The inverse effect occurs when a module with a smaller module width is to be used. Consequently, large outdoor systems with corresponding lengths can not be realized with such systems. OBJECT OF THE INVENTION

The invention is therefore based on the object overcomes mentioned disadvantages and to provide a flexible mounting system for mounting solar modules (in particular framed PV modules) on a substructure, which allows mounting modules of different module width in a simple and cost-effective manner. It should be noted that the mounting system must be designed so that it the forces occurring, such. B. withstands wind loads.

This object is achieved with a mounting system having the features of claim 1 and a mounting method having the features of claim 14. A first basic idea of the invention is not to realize the assembly of the PV modules by means of mounting elements in a fixed pitch pattern or a fixed grid at defined Verbindungselementpositionen on the substructure, but to provide a screwless, speak jamming connection with an adapter element, so that the Positioning of the adapter elements on the substructure can be suitably selected according to the selected PV module width.

A second basic idea of the invention is to be able to deform the mounting adapter for installation to the extent that it can be mounted, but to prevent said deformation possibility in the mounted state. The mounting adapter has for this purpose a clamping portion and a spring portion. In a state in which the mounting adapter is not yet mounted (initial position), the clamping portion of the mounting adapter can be widened in its effective width for the clamping by the spring portion of the adapter is "effective." However, the expansion is only possible as long as as the mounting adapter is not determined by is prevented from bending and thus widening in accordance with overlying PV modules.

In other words, the mounting adapter without assembled PV modules can be elastically deformed from its clamping position into its mounting position, in that it is pushed onto a profile leg of corresponding width and can be widened. As soon as he has reached the position intended for clamping, he deforms elastically back into its clamping position, which corresponds to the starting position. In this position, the clamping arms of the mounting adapter with corresponding clamping elements on the longitudinal profile carrier interact positively and / or non-positively.

If PV modules are applied to the top side of the mounting adapter in the clamped position in the mounted state, they form an abutment which counteracts the deformation direction of the mounting adapter and fix the underside of the mounting adapter against the abutment side of the profile leg. In this position, the spring travel, the spring section is shortened accordingly and thus the spring arm so to speak "ineffective", whereby a previously described expansion of the clamping portion and thus a release of the clamping adapter is inhibited from its clamping position by the invention described interaction between mounting adapter, longitudinal profile and PV module a "self-locking" effect, since the necessary spring length for bending the mounting adapter is no longer available when the PV modules fix the mounting adapter in its clamping position. It can also be provided that the mounting adapter receives a defined bias by already having a small "pre-bend" in its initial state along the spring section.

According to the invention, therefore, a mounting system is provided for fastening and supporting solar modules on a substructure, comprising send at least one side rail profile and at least one mounting adapter for clamping mounting on the side rail profile, wherein the mounting adapter has a clamping portion expandable from a clamping position in a mounting position clamping portion formed of a first, a clamping arm having legs, a second, a clamping arm having leg and one of the two legs connecting intermediate section and wherein the side rail profile forms a profile leg for releasable clamping attachment of the mounting adapter with the clamping portion.

The distance of the mounting adapter between the clamp arms and by means of the concrete selected construction of the mounting adapter (material, material thickness,

Design principle, ...) between the clamping arms determine the elastic properties, the o.g. Deformation possibility and the clamping force of the mounting adapter have a decisive influence.

In an advantageous embodiment of the invention, it is provided that the profile limb of the side rail profile provided for clamping extends along its longitudinal extension direction, preferably over its entire length. In this way, an assembly at any point of the side rail profile is possible.

It is also advantageous if the first and second legs each have an upper bearing surface for immediate or alternatively indirect mounting of a first and a second solar module. Thus, in a tilt of the solar system in a row above and below the side rail profile ever a PV module can be placed and fixed, which counteracts a bending of the mounting adapter.

It is further preferred if the intermediate portion between the legs at least one central fastening web with a connecting means z. B. has an opening for a screw in order to achieve a covering profile for fixing the solar modules on the bearing surfaces. The fixation force z. B. be adjusted accordingly via an adjustable fastener.

In an advantageous embodiment of the invention, it is provided that the bearing surfaces for the PV modules opposite undersides of the mounting adapter form an abutment for the top of the profile leg as soon as the mounting adapter is clamped mounted on the profile leg and the PV modules are fixed. Advantageously, it can further be provided that the first clamping arm has a nose profile adjacent to its free Klemmarmende that protrudes in the direction of the second clamping arm and / or the second clamping arm has a projection which extends in the direction of the first clamping arm and on its upper side Paragraph forms as a support for the profile leg. It is further preferred if the provided for clamping profile leg extending laterally away from a transverse thereto extending profile leg of the side rail profile and having an end bent retaining portion which is supported on a shoulder of a projection of the second clamping arm as soon as the mounting adapter clamped on the profile leg mon - is. In particular, a C-profile as a side member profile this advantage.

By such an embodiment of the longitudinal profile, a particularly good clamping on the one hand and a ease of assembly on the other hand can be achieved because a "under hook" and "levering" of the adapter can be done in its clamping position. For this purpose, a groove-shaped groove for receiving a projection of the first clamping arm is also provided with advantage on the vertically extending profile leg of the side rail profile.

It is also advantageous if the mounting adapter consists of a metallic alloy, preferably of an aluminum alloy. As a result, a high intrinsic stability can be achieved. It is further provided with advantage that in the clamping position of the mounting adapter, the inner distance between the two clamping arms of the mounting adapter is smaller than the corresponding width of the longitudinal profile carrier between see the outer sides of the provided for clamping profile legs.

The mounting adapter is further formed in an advantageous embodiment elastically bendable to be actuated in its mounting position, in which the inner distance between the two relatively dimensionally stable clamping arms of the clamping portion is increased by the bending of the mounting adapter during assembly relative to the clamping position so far that the Mounting adapter can be pressed over the corresponding profile leg of the side rail profile in its clamping position. For this purpose, it is further provided with advantage that the described operation of the mounting adapter is intended prevented from its clamping position in its expanded mounting position by the support or fixing of solar modules and thereby a stable clamping is achieved. Another aspect of the present invention relates to a mounting method for mounting a mounting system as described above, comprising the following steps:

- Attaching one or more mounting adapters with their clamping section on a provided for clamping profile leg of a

Side member profiles, wherein when attaching the mounting adapter, the clamping portion is first transferred to its expanded mounting position until the mounting adapter has reached its specific position for clamping and enters its clamping position, Mounting solar modules (PV modules) on top of the respective mounting adapter,

- Fixing two adjacent solar modules (PV modules) on the mounting adapter by means of a cover, so that bending of the mounting adapter is prevented in its mounting position by the profile legs act as unterseitges counter bearing and the solar modules as an upper abutment for the mounting adapter. Other advantageous developments of the invention are characterized in the subclaims or are shown in more detail below together with the description of the preferred embodiment of the invention with reference to FIGS.

1 shows a perspective view and a side view of one

Section of a mounting system according to the invention;

2 shows an inventive side rail profile,

3 shows an inventive mounting adapter for the side member profile of Figure 2, Figure 4 is a sectional view through a side member profile of Figure 2 with a mounted mounting adapter according to Figure 3 and

5 shows a sectional view similar to Figure 4 with fixed PV modules.

In the following, the invention will be explained in more detail with reference to a preferred exemplary embodiment with reference to FIGS. 1 to 5, wherein the same reference numbers refer to the same structural and / or functional features. FIG. 1 shows a perspective view and a side view of a section of a mounting system 1 according to the invention with PV modules 50, 51.

Shown are three side rail profiles 10, which are mounted on a substructure, not shown, at a defined inclination. The side rail profiles define the longitudinal extent L of the solar system (eg an outdoor installation).

The two PV modules are mounted on the six mounting adapters 20 shown, which are shown in more detail in Figures 3 to 5. First, the cross-sectionally C-shaped side rail section 10 will be described in more detail with reference to FIG. The side rail section 10 has a profile leg 12 extending in the vertical direction, to which the two legs 1, 13 extending transversely thereto adjoin. Both legs 1 1, 13 each have a bent (end side) web section 1 1.2 or 13.2.

The upper profile leg 1 1 is provided for clamping profile legs. The end bent over web portion 1 1.2, is formed to support on a shoulder 23.7 of a projection 23.4 of the second clamping arm 23.1 of the mounting adapter 20 as soon as the mounting adapter 20 by clamping on the profile leg 1 1 (as shown in Figure 4 and 5 in section) mounted is. It can also be seen that a trough-shaped groove 12.1 for receiving a projection of the first clamping arm 22.1 of the mounting adapter 20 is formed on the profile limb 12 of the side member profile 10. In the illustrated groove 12.1, as shown also in Figure 4 in more detail, the rounded nose of the clamping arm 22.1 dip.

The first clamping arm 22.1 is formed by two separate profile webs 22.9, which extend away from the leg 22 and are connected together at their ends, so that a circumferentially closed laterally open stable hollow chamber structure is formed, resulting in a particularly good flexural rigidity of the clamping arm 22.1. Similarly, the

Clamping arm 23.1 formed by two separate profile webs 23.9, which extend away from the leg 23 and also at their ends miteinan- (material-locking) are connected. The inner profile web is curved here.

As can further be seen in FIGS. 3 to 5, the first clamping arm 22. 1 has a nose profile 22. 4 adjacent to its free clamping arm end which protrudes in the direction of the second clamping arm 23. 1 and the second clamping arm 23. 1 has a projection 23 4 approximately diametrically opposite, which extends in the direction of the first clamping arm 22.1 and at its top a shoulder 23.7 as a support for the free end face of the profile leg 1 1 forms.

The mounting adapter 20 has an expandable from a clamping position in a mounting position clamping portion 21, which consists of a first, a clamping arm 22.1 having legs 22, a second, a clamping arm

23.1 having legs 23 and the two legs 22, 23 connecting intermediate portion 24 is formed. The leg 22 further includes a stop 28 to prevent the sliding of an applied PV module by acting as a "stop" element for the undercut on the frame of the PV module 50 or 51. The first and second Legs 22, 23 each have an upper bearing surface 22.2,

23.2 to the immediate (as shown in Figure 5) or alternatively to the indirect Auflagerung a first and second solar module 50, 51st

The intermediate section 24 has two profile webs 24.3 extending in the vertical direction and a transversely extending fastening web connecting them

24.1. The fastening web 24. 1 has an opening 24. 2 for a screw 29 on to attach a cover profile 25 for fixing the solar modules 50, 51 on the bearing surfaces 22.2, 23.2. The cover has a recessed box-shaped channel 25.1, in which the screw head of the screw 29 is inserted.

Furthermore, a plurality of bearing webs extending in the vertical direction 22.8, extending from the bearing surfaces 22.2, 23.2 opposite lower sides 22.7 of the mounting adapter 20 in the region of the clamping portion 21 downwardly extend a common bearing plane for the top 1.1 of the profile leg 1 1 on. This bearing webs 22.8 serve as an abutment of the profile leg 1 1 as soon as the mounting adapter 20 is clamped mounted on the profile leg. In this position, widening of the clamping portion 21 is prevented as intended, as soon as the PV modules are supported and fixed.

As can be further seen in FIG. 4, in the clamping position of the mounting adapter 20, the inner spacing D between the two clamping arms 22.1, 23.1 of the mounting adapter 20 is smaller than the width B in the corresponding region of the longitudinal profile carrier 10 above the groove 12.1 between the outer sides 10.1, 10.2 of the provided for clamping profile leg 1 1 (see Figure 2), wherein the distance between the outside of the end-side web portion 1 1.2 of the profile leg 1 1 and the outer vertex S of the groove-shaped groove 12.1 is approximately equal to the inner distance D, between the two clamping arms 22.1 , 23.1 of the mounting adapter 20 between the nose and the inside of the second clamping arm 23.1 in the region of paragraph 23.7. It can also be seen that the projection 23.7 is formed approximately in the thickness of the web portion 1 1.2.

As already explained, the mounting adapter 20 is formed elastically bendable with effective spring arm to be actuated in its mounting position, in which the inner distance Dj between the two clamping arms 22.1, 23.1 of the clamping portion 21 is increased by the bending of the mounting adapter 20 in the assembly process relative to the clamping position that the mounting adapter 20 can be pressed into its clamping position, wherein the actuation of the mounting adapter 20 from its clamping position in its expanded mounting position by the mounting of solar modules 50, 51st (as shown in Figure 5) is prevented as intended and thereby a stable clamping is achieved.

The invention is not limited in its execution to the above-given preferred embodiments. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use.

Claims

claims

1. mounting system (1) for mounting and Auflagerung of solar modules (50, 51) on a substructure comprising

a. at least one side rail profile (10) and at least one mounting adapter (20) for clamping mounting on the side rail profile (10), b. wherein the mounting adapter (20) has a clamping section (21) which can be widened from a clamping position into a mounting position, formed by a first leg (22) having a clamping arm (22.1), a second leg (23) having a clamping arm (23.1) and one the two legs (22, 23) connecting intermediate portion (24) and

c. wherein the longitudinal beam profile (10) forms a profile limb (1 1) for releasable clamping fastening of the mounting adapter (20) with the clamping portion (21).

2. Mounting system (1) according to claim 1, characterized in that the profile limb (1 1) of the side member profile (10) along the longitudinal extension direction (L) preferably extends over its entire length.

3. mounting system (1) according to claim 1 or 2, characterized in that the first and second legs (22, 23) each have an upper bearing surface (22.2, 23.2) for the direct or indirect Auflagerung a first and second solar module (50, 51) exhibit.

4. Mounting system (1) according to one of the preceding claims, characterized in that the intermediate portion (24) has at least one fastening web (24.1) with a connecting means (24.2) to a cover profile (25) for fixing the solar modules (50, 51 ) to be mounted on the bearing surfaces (22.2, 23.2).

5. Mounting system (1) according to one of the preceding claims, characterized in that the bearing surfaces (22.2, 23.2) opposite lower sides (22.7) of the mounting adapter (20) has a counter bearing for the top (1 1.1) of the profile limb (1 1 ) forms as soon as the mounting adapter (20) is mounted by clamping on the profile leg (1 1).

6. Mounting system (1) according to one of the preceding claims, character- ized in that the first clamping arm (22.1) a nose profile

(22.4) adjacent to its free Klemmarmende projecting in the direction of the second clamping arm (23.1) and / or the second clamping arm (23.1) has a projection (23.4) which extends in the direction of the first clamping arm (22.1) and at its Top forms a paragraph (23.7) as a support for the profile leg (12).

7. Mounting system (1) according to one of the preceding claims, characterized in that the provided for clamping profile leg (1 1) laterally extending away from a transverse thereto profile limb (12) of the longitudinal beam profile (10) and an end bent-over web portion (1 1.2) which is supported on a shoulder (23.7) of a projection (23.4) of the second clamping arm (23) as soon as the mounting adapter (20) is clamped on the profile limb (11).

8. Mounting system (1) according to claim 7, characterized in that on the profile limb (12) of the side member profile (10) has a groove-shaped groove (12.1) for receiving a projection of the first clamping arm (22.1).

9. ontagesystem (1) according to one of the preceding claims, characterized in that the mounting adapter (20) consists of a metallic alloy, preferably of an aluminum alloy.

10. Mounting system (1) according to one of the preceding claims, characterized in that the mounting adapter (20) at a longitudinal extension direction (L) freely selectable position of the side rail profile (10) with its clamping portion (21) can be fastened on this clamping.

1 1. Mounting system (1) according to one of the preceding claims, characterized in that in the clamping position of the mounting adapter (20), the inner distance (D,) between the two clamping arms (22.1, 23.1) of the mounting adapter (20) is lower than that Width (B) of the longitudinal profile carrier (10) between the outer sides (10.1, 10.2) of the profile limb (11) provided for clamping.

12. Mounting system (1) according to one of the preceding claims, character- ized in that the mounting adapter (20) is formed elastically bendable to be actuated in its mounting position, wherein the inner distance (D,) between the two clamping arms ( 22.1, 23.1) of the clamping portion (21) by the bending of the mounting adapter (20) during assembly relative to the clamping position is increased so far that the mounting adapter (20) in his

Clamping position can be pressed.

13. Mounting system (1) according to claim 12, characterized in that the actuation of the mounting adapter (20) from its clamping position in its expanded mounting position by the storage of solar modules (50, 51) is prevented as intended and thereby a stable clamping is achieved.

14. A method for mounting a mounting system (1) according to a

preceding claims 1 to 13, comprising the following steps:

a. Attaching one or more mounting adapters (20) with its clamping portion (21) on the provided for clamping profile leg (1 1) of the side rail profile (10), wherein when attaching the mounting adapter (20) of the clamping portion (21) is first transferred to its expanded mounting position until the mounting adapter has reached its clamping position and comes into its clamping position,

b. Auflagern a solar module (50, 51) on the top of the mounting adapter (20), so that bending of the mounting adapter (20) is prevented in its mounting position by the profile leg (1 1) as unterseitges counter bearing and the solar modules as the upper side abutment for the Mounting adapter (20) act.