KR101401266B1 - Folded seam fastening clamp for solar panel - Google Patents

Abstract

The present invention relates to a clamp which is able to tightly seal a solar panel by making the solar panel have an assembly part capable of being installed on a roof and compressing and combining the solar panel with a seaming part of a metal board loop of the lower part of the solar panel. The provided lock standing seam fastening clamp for the solar panel is able to tightly seal the seaming part of a metal board loop by including: a first stiffness member (110) and a second stiffness member (120) which are two stiffness members having different surfaces which face each other on the upper and lower ends and have lower end facing surfaces (119, 129) as the back of the upper end facing surfaces (118, 128) are extended to the lower part having the two stiffness members mutually cross between the upper end facing surfaces (118, 128) and the lower end facing surfaces (119, 129); a hinge part (200) which changes a distance between the upper end facing surfaces (118, 128) and the lower end facing surfaces (119, 129) by combining a point where the first stiffness member (110) and the second stiffness member (120) mutually cross using a hinge; one or more coupling members (310, 320) which couple the second stiffness member (120) with the first stiffness member (110) by respectively penetrating the upper end facing surfaces (118, 128) of the first stiffness member (110) and the second stiffness member (120); and a solar panel assembly part (115) formed to be extended by making any one upper end between the first stiffness member (110) and the second stiffness member (120) bend horizontally.

Description

[0001] The present invention relates to a folding seam fastening clamp for a solar panel,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar panel clamp, and more particularly, to a vertical folding clamp for a solar panel capable of tightly coupling a folded-up portion of a roof.

In modern society, enormous energy is consumed in human activities. Most of the energy consumed is fossil fuel. However, the use of fossil fuels is now facing serious problems of environmental pollution and depletion of fuel. Therefore, the development of new energy sources that can replace fossil fuels is urgently required.

Solar energy, wind energy, and geothermal energy are attracting attention as new energy sources that are currently being developed and used, due to the infinite energy sources. Among them, the energy production technology using solar energy was developed firstly and the international market was formed. Among them, the solar cell industry has the largest global market size. The total amount of light that the sun sends to Earth for one year is equivalent to the energy available to mankind worldwide over 10,000 years, based on current energy consumption. Therefore, not only large-scale photovoltaic power generation but also facilities for photovoltaic power generation are being operated in each home or facility.

The general structure of a photovoltaic installation installed on the roof in the home is shown in Fig. 1, a seaming panel is installed on a sandwich panel, and a fixing clamp 5 (see FIG. 1) for water tightness of a seaming part 1 formed at each border of the panels forming the seaming panel and a rail for assembling a solar panel Is installed.

However, the clamp 5 shown in Fig. 1 does not directly press the outside of both sides of the seaming part 1, but the upwardly extending part is fastened by the fastening member 7 to press the seaming part 1 The pressing force on both sides of the seaming portion 1 is inevitably weak. Further, since there is no supporting structure that can withstand the back and forth vibration in the fastening member insertion direction, the clamped portion of the clamp can be loosened by repeated vibrations. Therefore, it is necessary to develop a clamp having a structure resistant to vibration while pressing the seamed portion 1 more strongly.

Here, a conventional literature for installing a solar panel on a roof will be described in detail. First, a solar panel fixing device for installing solar panels on a roof of a building 10-1011792 shown in FIG. 2 can be seen.

In this embodiment, the solar cell module includes a solar cell module 20, a fixing part 40 for fixing the solar cell module to the solar cell module, a fixing part 40 for supporting both sides of the solar cell module in the longitudinal direction, Quot ;, and a coupling portion 30 formed in a " shape " shape so that the height of the solar photovoltaic plate 20 can be adjusted.

The fastening device is rotated about the through hole at the center of the lower side of the coupling portion 30 and the through hole is fixed to the feed groove 44 to define the rotation angle, It is prevented from contacting the photoelectric panel 20 and the engaging portion 30. According to the above configuration, a bulky structure is not required, the installation is simple and the cost is reduced, and the solar battery panel is prevented from being damaged by the wind due to the rotation of the coupling portion.

However, since the solar cell panel 20 is supported only by the joint portions 30 on both sides, the structure is vulnerable to wind, and thus it can be applied only to a small-scale solar installation. In addition, There is a problem that there is no configuration for means for installing the solar panel on the seaming panel roof when the seaming panel loop is installed by the assembling method.

FIG. 3 shows another prior art fastening method of a building integrated type solar cell module 10-1278227.

In the conventional technique, one end of the computer bolt is fixed to the roof frame 1 and the other end is exposed to the top of the roof top finishing material 7 by passing the bolts 10 through the inside of the roof top finish material 7, The lower end of the solar cell module A is mounted on the upper end of the support member 20 and the wind load supporting member 20 composed of the plate-like plate 21, the upper channel 23 and the spring nuts 25 therein A first clamp 30 for supporting the solar cell module and a first clamp 40 for fixing the solar cell module to the roof so as to be integrated with the outside of the building while suppressing the protrusion to the roof top, And the manufacturing method.

However, in the above-described conventional technique, a new structure is required to be inserted into the inside of the roof. Therefore, another measure for maintaining the watertightness is required, and a large number of parts are required due to the support members 20 having a plurality of clamps and a complicated structure. There is a limit in simplifying the construction and simplifying the construction.

Therefore, instead of inserting the structure into the existing roof as in the above-mentioned conventional techniques, the above-mentioned seaming panel roof is installed on the existing roof, and one clamp and the rail are assembled between the seaming panel roof and the solar panel, It becomes possible to install a solar panel, which is preferable in terms of complete watertightness and simplicity of construction.

However, a strong coupling between the sealing rope and the clamp must be ensured. However, the clamp described in FIG. 1 has a limitation in the rigidity of the coupling, and a new clamp is required to be developed.

Fig. 4 is a view for the European patent application EP 02339087, which is not for the installation of a solar panel, but a clamp for a rigid coupling of a protruding edge or protruding edge applied to inter-panel coupling in a seaming panel roof.

The prior art of FIG. 4 relates to a guard mounting clamp for protecting a roof from snow, comprising a plate (24,26) for pressing both sides of a seam (36) A bolt 44 and a nut 34 and a pin 50 for pressing one side of the seam 50 in accordance with the tightening of the bolt and a pin for pressing the seam 36 together with the bolt by tightening the bolt 50) is increased.

However, in FIG. 4, there is a problem that the clamping force can be weakened due to the shaking because there is no means by which the clamping can be prevented from being shaken when the clamp is shaken around the forward direction of the bolt.

As mentioned above, the development of a clamp that can guarantee a strong bonding force between a solar panel and a sealing panel roof under the solar panel while preventing the installation of the solar panel and the complete prevention of leakage is a challenge at the present stage have.

Patent Registration No. 10-1011792 (registered date: 2011. 01. 24)

Patent Registration No. 10-1278227 (Registration date: 2013. 06. 18)

European Patent Publication No. EP 2 339 087 B1

Accordingly, the present invention has been made to solve the problems of the prior art, and it is an object of the present invention to provide a solar panel capable of providing a complete waterproofing of a sealing panel loop in connection of a solar panel and a sealing panel loop, It is intended to provide a clamp for a flat folding panel.

In order to accomplish the above object, the present invention provides a vertical clamp for a vertical folding type solar cell panel, in which a plurality of metal plates are arranged side by side in a loop, adjacent end portions of the plates are respectively bent vertically upward at different heights, Wherein the solar panel is assembled on the upper part while water-tightly fixing the vertical folding part in which the end of the vertical part is folded together with the lower part of the vertical part to form a protruding bent part,

Two rigid members having opposing faces at the upper and lower ends, wherein the two rigid members cross each other between the upper opposing face and the lower opposing face so that the back face of the upper opposing face extends downward and becomes a lower opposing face A first rigid member and a second rigid member, a hinge unit hinging a point where the first rigid member and the second rigid member intersect with each other to vary the distance between the upper and lower opposite surfaces, At least one fastening member that passes through the upper opposing surfaces of the second rigid member and connects the first rigid member and the second rigid member, and an upper end of one of the first rigid member and the second rigid member is horizontally bent The solar panel assembly comprising:

The vertical joining portion is positioned between the lower end opposing surfaces so that both lower opposing surfaces contact the both surfaces of the vertical joining portion.

Particularly preferably, the first rigid member and the second rigid member are bent at right angles at the lower end of the lower end facing surface and extend outward from the lower end facing surface to support the first rigid member and the second rigid member from the floor, respectively One horizontal support plate and a second horizontal support plate.

Preferably, the first stiffening member and the second stiffening member further include fine unevenness formed on the lower end facing surface, so that when the vertical joining portion is squeezed, the frictional force of the lower end facing surface is further increased so as not to slip.

On the other hand, when both surfaces of the vertical joint are pressed against each other between the lower end facing surfaces, the upper facing surface and the lower end facing surface are opposed to each other in parallel, and the upper end facing surfaces are spaced apart from each other, So that the surface can leave a space where the both sides of the vertical joint can be squeezed as far as possible.

The still clamp fixing clamp for a solar panel according to the present invention has the following advantages.

First, the hinge portion is provided on the clamp, compared with the conventional clamping device for fixing the folding or protruding edge portion, so that the pressure at the portion to be clamped and fixed by the levering principle is maximized.

Second, by maximizing the pressure, the water tightness of the folded portion of the fur is further improved and the solar panel can be installed more firmly.

Third, by the horizontal plate supporting the clamp from the floor, the pressure of the clamp is maintained even though the clamp is horizontally vibrated, so that the solid connection of the solar panel is maintained.

Fourthly, the influence of the horizontal direction vibration can be further excluded by the fine unevenness of the lower end facing surface.

FIG. 1 is a perspective view showing a construction example of a general household solar panel,
FIG. 2 is an exploded perspective view showing a solar cell panel fixed fastening device installed on a roof of a building,
3 is a perspective view and partially enlarged front view showing a fastening method of a solar cell module with a built-
4 is a front view showing a clamp for installing a guard in a metal roof for snow removal in the prior art,
5 is a front view showing a still-folding fixing clamp for a solar panel according to the present invention,
6 is a perspective view showing a still-folding fixing clamp for a solar panel according to the present invention,

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, referring to FIG. 5, the overall configuration and configuration of the vertical folding clamp for a solar panel according to the present invention will be described in detail, and how the components function organically will be described in detail.

Referring to FIG. 5, the overall configuration and configuration of the present invention will be briefly described. In the loop of a vertical folding clamp for a solar panel according to the present invention, in which one or more metal plates 11, 12 and 13 are arranged side by side The adjacent ends of the metal plates 11, 12 and 13 are bent and joined to each other at right angles to each other at a different height to form a vertical joint 15, and the ends of the vertical joint 15 are bent together In a clamp in which a solar panel is assembled on an upper part while water-tightly fixing a vertical folding joint in which a protruding bent portion (10) is formed,

Two rigid members 110 and 120 having opposing faces at the top and bottom are formed such that two rigid members 110 and 120 intersect each other between the upper opposing faces 118 and 128 and the lower opposing faces 119 and 129, The first rigid member 110 and the second rigid member 120 are formed such that the back surface of the first rigid member 118 and the second rigid member 120 extend downward and the surface positioned at the height of the vertical joint 15 is the lower end facing surfaces 119 and 129, A hinge part 200 hinging at a point where the first stiffening member 110 and the second stiffening member 120 intersect with each other to vary the distance between the upper end facing surfaces 118 and 128 and the lower end surfaces 119 and 129, One or more fastening members 310 and 320 for passing the first rigid member 110 and the second rigid member 120 through the upper opposing surfaces 118 and 128 of the first rigid member 120 and the upper rigid member 120, The upper end of one of the member 110 and the second rigid member 120 is horizontally bent and extended, And the vertical joint portion 15 is positioned between the lower end facing surfaces 119 and 129 so that both lower surfaces of the vertical joint portion 15 are pressed against the lower end facing surfaces 119 and 129, respectively .

In this case, when the plurality of metal plates 11, 12, 13 are arranged side by side in a finishing portion such as a building roof or an outer wall made up of a plurality of metal plates 11, 12, 13, 12, 13 at the interface between the metal plates 11, 12, 13, and is a well known and practiced technique. However, since the present invention is closely related to the present invention, it will be briefly described.

Referring to FIG. 5, brief description will be given of the folding of the upper and lower metal plates 11 and 12 at the boundary between the adjacent metal plates 11 and 12, 12 are vertically folded. Thus, the vertical joint 15 is formed.

At this time, the adjacent metal plates 11 and 12 are not bent at the same height but bent at different heights. In Fig. 5, the left plate member 11 is shown to be longer (higher) in the vertical direction. And then bent to a point downward at a certain distance from the upper end of the jointed portion at an angle of 90 degrees or more in the horizontal direction. So that the protruded bent portion 10 having the same shape as that of the dried hair is formed.

Here, the bending direction is set so that when the bending is vertically bent, the height is directed toward the lower bent side (12 in Fig. 5, i.e., the right side). The reason for this is that the upper portion of the upper portion of the protruded bent portion 10 is wrapped around the upper portion. This is because watertightness of the coupling portion is improved and the coupling force is increased as compared with the case where the height of the both side panels in the vertical joint portion 15 is equal to each other.

As shown in FIG. 5, the additional metal plate 13 may be inserted into the substantially folded portion in order to improve the watertightness of the portion joined by the folding.

For reference, FIG. 1 shows a state in which a conventional clamp 5 is coupled to a joint portion 1 of a metal plate formed by a folding process, although not clearly shown.

The clamp is basically composed of the first rigid member 110, the second rigid member 120, the hinge unit 200, and the fastening members 310 and 320.

The first stiffening member 110 and the second stiffening member 120 may be generally plate-like as in Figures 5 and 6, but need not necessarily be, and may include upper and lower opposing surfaces 118 and 128, Only the facing surfaces facing each other on the surfaces 119 and 129 can be flat. Hereinafter, the shapes of the exemplary embodiments shown in FIGS. 5 and 6 will be described.

The first stiffening member 110 and the second stiffening member 120 intersect each other between the upper end and the lower end so that the lower end facing surfaces 119 and 129 correspond to the rear surfaces of the upper end facing surfaces 118 and 128, respectively. To be more precise, the lower end of the entire rear surface of the upper opposing surfaces 118 and 128 is formed. This is a characteristic that the entire clamp is naturally formed in a shape similar to the X-shape due to the intersection of the two rigid members 110 and 120.

In FIG. 6, the center of the first rigid member 110 is formed as an empty space and the second rigid member 120 is inserted into the empty space at the intersection between the upper and lower ends. On the contrary, the second rigid member 120 may be formed in such a manner that an empty space is formed in the second rigid member 120 and the first rigid member 110 is inserted into the space. Alternatively, two rigid members 110 and 120 may be formed at intersections (Not shown). Therefore, there is no particular limitation on the specific shape in which the two rigid members 110 and 120 intersect between the upper and lower ends.

5 and 6, a tunnel or an insertion hole into which the hinge shaft 210 can be inserted at a point where the width portions in the lateral thickness direction are overlapped with each other is formed at the intersection of the two rigid members 110 and 120, Members are formed so as to communicate with each other.

And the fastening members 310 and 320 for coupling the two rigid members are arranged to penetrate the upper opposing surfaces 118 and 128. [ The fastening members 310 and 320 are preferably bolts 310 and nuts 320 so that the binding force can be adjusted by fastening the nuts 320 as needed.

Referring to FIG. 5, a solar panel assembly 115 is shown extending horizontally at an upper end of the first rigid member 110. The structure in which the solar panel is assembled by the solar panel assembly unit 115 will be described with reference to FIG.

1, the upper end of the conventional clamp 5 has the same configuration as that of the solar panel assembly 15 in the vertical folding clamp for a solar panel according to the present invention. Here, a rail connecting each clamp is assembled and a solar panel is assembled on the assembled rails. The solar panels can be firmly assembled by a plurality of rails.

5, the vertical joint 15 formed at the coupling position between the metal plates 11, 12, 13 under the clamp is positioned between the lower end facing surfaces 119, 129 and is pressed by the lower end facing surfaces 119, 129 . And the protruding bent portion 10 can be contained in a space formed between the lower end facing surfaces 119 and 129 and the hinge portion 200.

Particularly preferably, the first rigid member 110 and the second rigid member 120 are formed such that when the lower end facing surfaces 119 and 129 press the both surfaces of the vertical joint portion 15, the metal plate material And a second horizontal support plate 121 for supporting the first horizontal support plate 111 and the second horizontal support plate 121, respectively. The first horizontal support plate 111 is formed integrally with the first rigid member 110 and the second horizontal support plate 121 is integrally formed with the second rigid member 120.

Each of the horizontal support plates 111 and 121 has a shape extending in the opposite direction to the rigid members 110 and 120 opposed to each other and the horizontal support plates 111 and 121 are perpendicular to the lower end facing surfaces 119 and 129.

In addition, preferably, fine concavities and convexities 113 and 123 are formed on both opposite surfaces of the lower end facing surfaces 119 and 129 on the lower end facing surfaces 119 and 129.

Hereinafter, the organic operation of each component will be described based on the overall shape and structure of the present invention described above.

5, the first stiffening member 110 and the second stiffening member 120 are hinged to each other at an intersecting point between the upper end and the lower end of the first stiffening member 110 and the second stiffening member 120 by the hinge portion 200 .

The upper end facing surfaces 118 and 128 and the lower end facing surfaces 119 and 129 are interlocked with each other by the hinge coupling. Namely, if the distance between the upper opposing faces 118 and 128 becomes smaller due to the tightening of the nut 320, the distance between the lower opposing faces 119 and 129 becomes smaller. If the distance between the upper opposing faces 118 and 128 becomes larger, ) Becomes larger.

Since the directions in which the distance between the upper end surfaces 118 and 128 and the lower end surfaces 119 and 129 are matched with each other, the force by tightening the nut 320 that engages the upper end surfaces 118 and 128 is directly applied to the lower end surfaces 119 and 129 So that both sides of the vertical coupling part 15 are pressed, so that the pressing force can be directly transmitted as compared with the conventional clamp.

As shown in FIG. 1, the conventional clamp does not have a structure in which both sides of the opposed clamps cross each other for pressing the portion corresponding to the vertical joint portion 15, and a means such as the hinge portion 200 is not provided It is possible to prevent the pressing force from being directly transmitted to the portion corresponding to the vertical joining portion 15 where the pressing is performed and by joining and fastening the joining member 7 passing through all the surfaces opposed to each other at the upper portion above the protruding bent portion 10, .

At this time, in order to directly transmit the pressing force to the portion corresponding to the vertical joint portion 15, the opposite surface contacting the both surfaces of the portion corresponding to the vertical joint portion 15 and the portion corresponding to the vertical joint portion 15 are passed through The watertightness of the vertical joint portion is deteriorated due to the through hole, so that the water can be infiltrated in the rain.

Therefore, according to the present invention, the two opposite faces of the clamp are made to intersect with each other between the upper and lower ends, and when the opposite face of the upper face is pressed by the hinge, the opposite face of the lower face So that they can be squeezed with the same force.

At this time, the pressing force for narrowing the distance between the lower end surfaces 119 and 129 corresponds to the moment about the hinge portion 200 as an axis. Therefore, the distance H between the fastening members 310 and 320 and the hinge unit 200 is increased as much as possible by increasing the moment derived from the definition of the moment 'moment = displacement (radius) X force'. Therefore, the fastening members 310 and 320 preferably engage the first stiffening member 110 and the second stiffening member 120 at the uppermost portion of the upper end surfaces 118 and 128.

The first horizontal supporting plate 111 and the second horizontal supporting plate 121 are integrally formed at the lower ends of the first rigid member 110 and the second rigid member 120 in order to multiply the rigidity of the compression bonding, Respectively. The horizontal support plates 111 and 121 are perpendicular to the surfaces of the lower end facing surfaces 119 and 129 so as to be in close contact with the metal plates 11 and 12 and 13 forming the bottom so that the influence of the longitudinal vibration in the tightening direction of the fastening members 310 and 320 Can be dispensed with.

That is, even when the lower opposing faces 119 and 129 are pressed strongly against the vertical joining portion 15, the points where the lower opposing faces 119 and 129 and the both faces of the vertical joining portion 15 are in contact with each other The first horizontal supporting plate 111 and the second horizontal supporting plate 121 are provided as structures that can prevent such a phenomenon since they can be twisted or deviated with time.

On the other hand, as shown in FIG. 5, the lower opposing surfaces 119 and 129 may be provided as an additional means for eliminating the influence of forces acting in the front, rear, left, and right directions together with the first horizontal support plate 111 and the second horizontal support plate 121, It is preferable that fine concavities and convexities 113 and 123 are formed on the surface so that the contact between the vertically abutting surface 15 and the lower end abutting surfaces 119 and 129 is not shifted or twisted with each other and the initial pressing point is maintained firmly.

When the both surfaces constituting the lower end facing surfaces 119 and 129 are pressed against both surfaces of the vertical joint portion 15, it is preferable that a gap be formed between both surfaces constituting the upper end facing surfaces 118 and 128. The vertical joining portion 15 pressed between the lower opposing faces 119 and 129 is made of the metal plates 11 and 12 and 13 but the metal is deformed when the stress is applied so that the greater the pressing force of the lower opposing faces 119 and 129, The thickness of the portion to be pressed by the pressing member 15 is slightly reduced. In this case, since the deformation of the metal is less likely to be recovered by elasticity, there is a limit to the extent to which the lower end facing surfaces 119 and 129 compress the both surfaces of the vertical joint portion 15, if there is no gap between the upper end facing surfaces 118 and 128 .

Therefore, even if the lower opposing faces 119 and 129 are already pressed on both sides of the vertical joining portion 15, it is possible to perform additional pressing so that the thickness of the vertical joining portion 15 is reduced to the maximum extent It is possible to squeeze it to the point where it can become.

At this time, preferably, the opposing surfaces of the lower end facing surfaces 119 and 129 and the upper end facing surfaces 118 and 128 are parallel to each other at a point where the vertical joint portion 15 receives a maximum pressing force to reduce the thickness. Particularly, in this case, since the first horizontal support plate 111 and the second horizontal support plate 121 are perpendicular to the lower end facing surfaces 119 and 129, the first horizontal support plate 111 And the second horizontal support plate 121 are brought into close contact with the metal plates 11, 12 and 13 forming the bottom surface, so that the clamped state of the clamp according to the present invention can be stably supported.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

1: Seaming site 5: Clamp
7: fastening member 10: protruding bent portion
11: metal plate 12: metal plate
13: metal plate 15: vertical joint
110: first rigid member 111: first horizontal support plate
113: fine irregularities 115: solar panel assembly part
118: upper facing surface 119: lower facing surface
120: second stiffness member 121: second horizontal support plate
123: fine concave and convex 128: upper facing surface
129: lower facing surface 200: hinge portion
210: Hinge axis 310: Bolt
320: Nut

Claims (4)

In a loop in which one or more metal plates 11, 12, 13 are arranged side by side, the adjacent ends of the metal plates 11, 12, 13 are bent at different heights, And the vertical joining portion 15 is folded together with the lower end of the vertical joining portion 15 so that the protruding bent portion 10 is formed. As a result,
Two rigid members having opposing faces at the top and bottom, wherein the two rigid members intersect each other between the top opposing surfaces 118, 128 and the bottom opposing surfaces 119, 129, so that the back surface of the top opposing surfaces 118, A first stiffening member 110 and a second stiffening member 120 extending downwardly and serving as lower end surfaces 119 and 129;
A hinge part 200 for hinge-joining a point where the first rigid member 110 and the second rigid member 120 intersect with each other;
One or more fastening members 310, 320 (not shown) for penetrating the first rigid member 110 and the upper opposing surfaces 118, 128 of the second rigid member 120 to engage the first rigid member 110 and the second rigid member 120, ); And
And a solar panel assembly (115) having an upper end of one of the first stiffening member (110) and the second stiffening member (120) bent and extended horizontally,
The vertical joining portion 15 is positioned between the lower opposing faces 119 and 129 so that the lower opposing faces 119 and 129 respectively contact both surfaces of the vertical joining portion 15 with each other. The method according to claim 1,
The first rigid member 110 and the second rigid member 120 are bent at right angles at the lower ends of the lower end facing surfaces 119 and 129 and extend outward from the lower end facing surfaces 119 and 129 to form a first rigid member 110, Further comprising a first horizontal support plate (111) and a second horizontal support plate (121) for supporting the second rigid member (120) from the bottom respectively. The method according to claim 1,
Wherein the first rigid member (110) and the second rigid member (120) further comprise fine irregularities (113,123) formed on the lower end facing surfaces (119,129). 3. The method of claim 2,
When the both surfaces of the vertical joint are pressed against each other between the lower end facing surfaces 119 and 129, the upper end facing surfaces 118 and 128 and the lower end facing surfaces 119 and 129 are opposed to each other such that opposite facing surfaces are parallel to each other, And a spacing is formed between the vertical clamping clamp and the vertical clamping clamp.

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