Curtain wall keel connection structure

Abstract

The present invention discloses a curtain wall keel connection structure, comprising vertical keels, one or both sides of which are connected to transverse keels via a connection assembly. The transverse keels are provided with transverse inwardly enlarged grooves. The connection assembly includes a connector mounted on the vertical keels, each connector having a connecting portion corresponding to each transverse keel. The connecting portion is connected to the transverse keel via an expansion mechanism that expands and engages with the transverse inwardly enlarged grooves. The expansion mechanism includes one or more third expansion screws, which are threadedly mounted on the connecting portion and cooperate with the connecting portion to simultaneously expand the inner wall of the transverse inwardly enlarged groove. The present invention has the advantages of easy installation, high connection strength, high stability and reliability, and good rust resistance.

Description

[0001] (This application is a divisional application of “Keel Connection Structure for Curtain Wall”. The filing date of the original application is April 28, 2017, with application number 201710294886.9. The name of the invention is “Keel Connection Structure for Curtain Wall”.) Technical Field

[0002] The present invention relates to the technical field of construction engineering, and in particular to a keel connection structure of a curtain wall. Background Art

[0003] Currently, the connection between horizontal and vertical purlins in curtain walls on the market is mainly achieved through splicing and welding. Among them, splicing is further divided into two types: one is the sequential installation of sub-units, that is, first installing the first vertical purlin, and then alternately installing the horizontal purlins and vertical purlins on the side of the first vertical purlin until the installation of the entire curtain wall is completed; the other is the post-installation of the horizontal purlins, that is, first installing all the vertical purlins of the curtain wall according to the set spacing, and then installing the horizontal purlins between adjacent vertical purlins. The disadvantage of the above-mentioned former installation method is that after the curtain wall is installed, if errors or other factors occur and the purlins need to be replaced, all purlins after the replacement position need to be removed, otherwise the purlins cannot be removed. In addition, the sequential installation of sub-units is prone to cumulative errors, resulting in large deviations in the partition size between the last installed vertical purlins. For example, if the curtain wall installed from left to right has 50 partitions, if the length of each horizontal purlin is reduced by 3mm, the size of each partition (the spacing between adjacent vertical purlins) will also be reduced by 3mm, and the final cumulative error can be as high as 150mm. The latter installation method is to install the horizontal purlins between the vertical purlins after all the vertical purlins are installed. When replacing any of the purlins, you only need to dismantle and install the purlin that needs to be replaced, and this installation method will not cause cumulative errors.

[0004] However, the existing curtain wall technology with rear-mounted horizontal keels is not mature enough and has the following defects:

[0005] 1. The connectors and screws between the keels are difficult to hide. Most of the connectors and screws are exposed, which not only affects the installation of the curtain wall panels, but also makes the appearance of the curtain wall after installation not simple and refined enough;

[0006] 2. The large number of connectors and screws required to connect the keels makes disassembly and assembly difficult and inefficient. In addition, a large number of fastening holes need to be opened on the keels, which will affect the strength of the keels and reduce the rust resistance of the keels.

[0007] 3. The force is transmitted between the keel and the connecting parts by direct fastening with screws, which has problems such as difficulty in ensuring the connection strength, easy loosening and failure, and low safety. In addition, the screws are connected to the side wall of the keel, which has poor force balance and stability. The side wall of the tubular keel is also prone to deformation and damage, which requires a high wall thickness of the keel, increasing the weight of the keel and the overall cost. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a curtain wall keel connection structure that is easy to install, has high connection strength, high stability and reliability, and good anti-rust ability.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0010] A curtain wall purlin connection structure includes a vertical purlin, one side or both sides of the vertical purlin are connected to a transverse purlin via a connecting assembly, the transverse purlin is provided with a transverse inward-expanding groove, the connecting assembly includes a connecting piece installed on the vertical purlin, the connecting piece is provided with a connecting portion corresponding to each transverse purlin, the connecting portion is connected to the transverse purlin via an expansion mechanism that is expansion-fitted with the transverse inward-expanding groove; the expansion mechanism includes one or more third expansion screws, the third expansion screws are threadedly installed on the connecting portion and cooperate with the connecting portion to simultaneously expand the inner wall of the transverse inward-expanding groove.

[0011] In the above-mentioned curtain wall keel connection structure, preferably, the connection portion and the third expansion screw are combined to form a sliding structure that only slides with the transverse inwardly expanded groove.

[0012] In the above-mentioned curtain wall keel connection structure, preferably, the connection portion is a plug-in structure that can be inserted into the transverse inwardly expanded groove from the notch of the transverse inwardly expanded groove.

[0013] In the above-mentioned curtain wall keel connection structure, preferably, the transverse keel is supported on the connection part, and the connection part is provided with a positioning part for preventing the connection part and the transverse keel from moving relative to each other in the direction of the opening of the transverse inwardly expanded groove.

[0014] In the above-mentioned curtain wall keel connection structure, preferably, the connecting member is fixedly installed on the vertical keel through a first fastening connection assembly, and the first fastening connection assembly includes one or more first fastening screws that directly connect and fasten the vertical keel and the connecting member; the front side of the vertical keel is provided with a vertical groove, and the connecting member is provided with an internal connecting portion accommodated in the vertical groove, and the internal connecting portion is fixedly connected to the vertical keel by at least one first fastening screw.

[0015] In the above-mentioned curtain wall keel connection structure, preferably, the inner connecting portion is a plug-in structure that can be inserted into the vertical groove from the vertical groove notch.

[0016] In the above-mentioned curtain wall keel connection structure, preferably, the vertical groove is an inwardly expanded groove, and the inner connection portion is a sliding connection structure that only slides with the vertical groove.

[0017] In the above-mentioned curtain wall keel connection structure, preferably, the first fastening screw is accommodated in the vertical groove.

[0018] In the above-mentioned curtain wall keel connection structure, preferably, the connecting member has a first fitting portion that fits with the front surface of the vertical keel, and the first fitting portion is fixedly connected to the vertical keel by at least one first fastening screw.

[0019] In the above-mentioned curtain wall keel connection structure, preferably, the connecting member has a second fitting portion that fits with the side surface of the vertical keel, and the second fitting portion is fixedly connected to the vertical keel by at least one first fastening screw.

[0020] Compared with the prior art, the advantages of the present invention are: the keel connection structure of the curtain wall of the present invention can realize the post-installation and separate disassembly of the transverse keel, and the connecting part of the transverse keel and the connecting piece is connected through an expansion mechanism. Since the expansion mechanism is connected by expansion cooperation with the transverse inward expansion groove, the strength, stability and reliability of the connection can be improved, and the expansion mechanism does not need to be provided with fasteners connected to the transverse keel, which can avoid the fasteners from perforating the transverse keel, can reduce the difficulty of installation, improve installation efficiency, reduce the impact on the strength of the transverse keel, and improve the anti-rust ability of the transverse keel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure of the keel connection structure of the curtain wall in Example 1.

[0022] Figure 2 This is a side structural schematic diagram of the keel connection structure of the curtain wall in Example 1.

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the connecting piece in Example 1.

[0024] Figure 4 This is a side structural schematic diagram of the keel connection structure of the curtain wall in Example 2.

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the keel connection structure of the curtain wall in Example 3.

[0026] Figure 6 This is a side structural schematic diagram of the keel connection structure of the curtain wall in Example 3.

[0027] Figure 7 This is a schematic diagram of the bottom view of the keel connection structure of the curtain wall in Example 3.

[0028] Figure 8This is a schematic diagram of the three-dimensional structure of the connecting piece in Example 3.

[0029] Figure 9 This is a schematic diagram of the bottom view of the keel connection structure of the curtain wall in Example 4.

[0030] Figure 10 This is a schematic diagram of the three-dimensional structure of the keel connection structure of the curtain wall in Example 5.

[0031] Figure 11 This is a side structural schematic diagram of the keel connection structure of the curtain wall in Example 5.

[0032] Figure 12 This is a schematic cross-sectional structural diagram of the keel connection structure of the curtain wall in Example 5.

[0033] Figure 13 This is a schematic diagram of the three-dimensional structure of the connecting piece in Example 5.

[0034] Figure 14 This is a schematic top view of the keel connection structure of the curtain wall in Example 6.

[0035] Figure 15 This is a schematic diagram of the three-dimensional structure of the keel connection structure of the curtain wall in Example 7.

[0036] Figure 16 This is a side structural schematic diagram of the keel connection structure of the curtain wall in Example 7.

[0037] Figure 17 This is a schematic diagram of the three-dimensional structure of the connecting piece in Example 7.

[0038] Figure 18 This is a schematic diagram of the three-dimensional structure of the connecting piece in Example 8.

[0039] Figure 19 Schematic diagram of the three-dimensional structure of the keel connection structure of the curtain wall in Example 9.

[0040] Figure 20 This is a schematic diagram of the three-dimensional structure of the connecting piece in Example 9.

[0041] Figure 21 This is a schematic diagram of the three-dimensional structure of the connecting piece in Example 10.

[0042] Figure 22 This is a side structural schematic diagram of the keel connection structure of the curtain wall in Example 11.

[0043] Legend:

[0044] 1. Vertical keel; 11. Vertical groove; 2. Horizontal keel; 21. Laterally inward-expanded groove; 3. Connecting piece; 31. Connecting portion; 311. Abutment foot; 3111. Abutment portion; 312. Positioning portion; 32. First expansion portion; 33. Second expansion portion; 34. Third expansion portion; 35. Arched expansion portion; 36. Internal connection portion; 37. First fitting portion; 38. Second fitting portion; 39. Supporting portion; 4. Expansion piece; 5. Supporting piece; 101. First fastening screw; 102. Second fastening screw; 201. Tensioning screw; 202. First expansion screw; 2021. Expansion sleeve; 203. Second expansion screw; 204. Third expansion screw. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Example 1:

[0047] like Figures 1 to 3 As shown, the curtain wall purlin connection structure of this embodiment includes a vertical purlin 1, one side of which is connected to a transverse purlin 2 via a connecting assembly. The transverse purlin 2 is provided with a transverse inwardly expanded groove 21. The connecting assembly includes a connector 3 mounted on the vertical purlin 1. The connector 3 has a connecting portion 31 corresponding to each transverse purlin 2. The connecting portion 31 is connected to the transverse purlin 2 via an expansion mechanism that expands and engages with the transverse inwardly expanded groove 21. The expansion mechanism of this embodiment includes two first expansion screws 202 and two first expansion portions 32 spaced apart and connected to the connecting portions 31. The first expansion screw 202 is threadedly connected to the connecting portion 31 and is located between the two first expansion portions 32, forcing the two first expansion portions 32 away from each other to expand the inner walls of the transverse inwardly expanded groove 21.

[0048] In this embodiment, an expansion sleeve 2021 is sleeved over the first expansion screw 202. The expansion sleeve 2021 features a tapered surface that forces the two first expansion portions 32 to gradually move away from each other. As the first expansion screw 202 is tightened, the expansion sleeve 2021 forces the two first expansion portions 32 to gradually move away from each other, enabling rapid and effective expansion. The first expansion screw 202 simultaneously connects the fastening connection portion 31 and the transverse keel 2, enhancing the strength, stability, and reliability of the connection between the connector 3 and the transverse keel 2. Of course, in other embodiments, the first expansion screw 202 may be connected only to the connection portion 31.

[0049] In this embodiment, the connection portion 31 and the two first expansion portions 32 are combined to form a sliding structure that only slides with the transverse inward-expanding groove 21. The sliding structure cooperates with the transverse inward-expanding groove 21 to limit all degrees of freedom of the transverse keel 2 except sliding along the extension direction of the transverse inward-expanding groove 21, thereby improving the installation stability and reliability of the transverse keel 2.

[0050] In this embodiment, the connector 3 is fixedly mounted on the vertical purlin 1 via a first fastening assembly comprising two first fastening screws 101, each of which directly connects and fastens the vertical purlin 1 to the connector 3. Specifically, the connector 3 is provided with a first abutting portion 37 that abuts against the front surface of the vertical purlin 1, and the two first fastening screws 101 directly connect and fasten the vertical purlin 1 to the first abutting portion 37.

[0051] In this embodiment, the first expansion screw 202 is accommodated in the transverse inward-expanded groove 21. The first expansion screw 202 is not exposed and will not affect the installation of the curtain wall panel. The curtain wall panel can be well fitted with the surface of the horizontal purlin 2 and the vertical purlin 1, so that the fit and installation stability of the curtain wall panel are greatly improved, and the appearance of the curtain wall after installation can be ensured to be simple and exquisite.

[0052] In this embodiment, the front face of the vertical purlin 1 is provided with a vertical groove 11. This inwardly expanding groove 11 allows the vertical purlin 1 to utilize the same pipe fittings as the transverse purlin 2, eliminating the need to design and manufacture separate pipe fittings. During installation, there is no need to distinguish between the vertical purlin 1 and the transverse purlin 2, which helps save costs and improves the ease of installation. The vertical groove 11 and the transverse inwardly expanding groove 21 are composed of a bottom trough body and a top trough body. The maximum cross-sectional width of the bottom trough body is greater than the maximum cross-sectional width of the top trough body, and the cross-sectional width of the bottom trough body is rectangular. The connecting portion 31 and the two first expansion portions 32 of this embodiment combine to form a U-shaped structure that slides only with the bottom trough body of the transverse inwardly expanding groove 21.

[0053] The connector 3 of this embodiment is further provided with a second fitting portion 38 that fits against the side of the vertical keel 1, thereby improving the connection stability. The connector 3 of this embodiment is made of a bent plate, which is easy to manufacture and low in cost.

[0054] When installing the keel connection structure of the curtain wall of this embodiment, the connecting member 3 is first placed in the transverse inwardly expanded groove 21 , and then the vertical keel 1 and the connecting member 3 are fixedly connected using the first fastening screw 101 .

[0055] Example 2:

[0056] The keel connection structure of the curtain wall of this embodiment is basically the same as that of embodiment 1, the main difference is that Figure 4 As shown, in this embodiment, the second fitting portion 38 of the connector 3 is further fixedly connected to the vertical keel 1 via a first fastening screw 101, which can further improve the strength, stability and reliability of the connection. At the same time, the vertical keel 1 has good force-bearing capacity and is not easily damaged.

[0057] Example 3:

[0058] The keel connection structure of the curtain wall of this embodiment is basically the same as that of embodiment 1, the main difference is that Figures 5 to 8 As shown, in this embodiment, a transverse keel 2 is connected to each side of the vertical keel 1. The connector 3 has a connecting portion 31 corresponding to each transverse keel 2. The tensioning mechanism is a third tensioning screw 204, which is threadedly mounted on the connecting portion 31. The third tensioning screw 204 and the connecting portion 31 cooperate to simultaneously tighten the inner wall of the transversely inwardly expanded groove 21.

[0059] In this embodiment, the connection portion 31 and the third expansion screw 204 are combined to form a sliding structure that only slides with the transverse inward-expanded groove 21. The sliding structure cooperates with the transverse inward-expanded groove 21 to limit all degrees of freedom of the transverse keel 2 except sliding along the extension direction of the transverse inward-expanded groove 21, thereby improving the installation stability and reliability of the transverse keel 2.

[0060] In this embodiment, the connecting portion 31 is a plug-in structure that can be inserted into the transverse inwardly expanded groove 21 through the notch of the transverse inwardly expanded groove 21. During installation, the transverse keel 2 can be hung on the connecting portion 31 through the transverse inwardly expanded groove 21, making installation convenient and quick. Furthermore, the transverse keel 2 is supported on the connecting portion 31, and the connecting portion 31 is provided with a positioning portion 312 that prevents the connecting portion 31 and the transverse keel 2 from moving relative to each other in the direction of the notch opening of the transverse inwardly expanded groove 21. After the transverse keel 2 is installed on the connecting portion 31, the positioning portion 312 positions the transverse keel 2, which helps ensure the accuracy of the installation position of the transverse keel 2. Before installation and tightening, there is no need for manual support of the transverse keel 2, making installation more labor-saving and convenient. Preferably, the transverse keel 2 is supported on the positioning portion 312 of the connecting portion 31, so that after the transverse keel 2 is installed on the connecting portion 31, the positioning portion 312 supports the transverse keel 2 and positions it.

[0061] In this embodiment, the vertical groove 11 is generally dovetail-shaped. The connector 3 also includes an internal connection portion 36 that is received within the vertical groove 11. This internal connection portion 36 is fixedly connected to the vertical purlin 1 via a first fastening screw 101, further enhancing the strength, stability, and reliability of the connection. This also provides the vertical purlin 1 with improved load-bearing properties and prevents damage. The first fastening screw 101 is received within the vertical groove 11 without interfering with the installation of the curtain wall panels.

[0062] In this embodiment, the internal connection portion 36 is a sliding structure that only slides with the vertical groove 11. The sliding structure cooperates with the vertical groove 11 to limit all degrees of freedom of the connecting member 3 except sliding along the extension direction of the vertical groove 11, which can improve the installation stability and reliability of the connecting member 3.

[0063] In this embodiment, each connecting portion 31 of the connecting member 3 is provided with a holding portion 39 for holding the curtain wall panel, so as to facilitate the installation of the curtain wall panel.

[0064] Example 4:

[0065] The keel connection structure of the curtain wall of this embodiment is basically the same as that of embodiment 3, the main difference is that Figure 9 As shown, in this embodiment, the vertical purlin 1 does not have the vertical groove 11, and the front surface of the vertical purlin 1 is flat. The connector 3 does not have the internal connection portion 36, and the connector 3 only has a first contact portion 37 that contacts the front surface of the vertical purlin 1. The first contact portion 37 is fixedly connected to the vertical purlin 1 via two first fastening screws 101.

[0066] Example 5:

[0067] The keel connection structure of the curtain wall of this embodiment is basically the same as that of embodiment 3, the main difference is that Figures 10 to 13 As shown, in this embodiment, a transverse keel 2 is connected to each side of the vertical keel 1. The connecting member 3 is provided with a connecting portion 31 corresponding to each transverse keel 2. The expansion mechanism includes an expansion member 4 and one or more tensioning screws 201 placed in the transverse inwardly expanded groove 21. The connecting portion 31 is provided with a foot 311 that abuts against the inner wall of the transverse inwardly expanded groove 21. The tensioning screw 201 is connected between the connecting portion 31 and the expansion member 4. The tensioning screw 201 forces the foot 311 and the expansion member 4 to expand the inner wall of the transverse inwardly expanded groove 21.

[0068] In this embodiment, the combination of the expansion member 4 and the connecting portion 31 constitutes a sliding structure that only slides with the transverse inward-expanding groove 21. The sliding structure cooperates with the transverse inward-expanding groove 21 to limit all degrees of freedom of the transverse keel 2 except sliding along the extension direction of the transverse inward-expanding groove 21, thereby improving the installation stability and reliability of the transverse keel 2.

[0069] In this embodiment, the expansion member 4 is a plate member that is inserted into the transversely expanded groove 21 along one end thereof and can slide along the transversely expanded groove 21. The abutment foot 311 is provided with an abutment portion 3111 that contacts and cooperates with the bottom wall of the transversely expanded groove 21, thereby improving the stability and reliability of the expansion connection.

[0070] In this embodiment, the connector 3 further includes an internal connection portion 36 received in the vertical groove 11. This internal connection portion 36 is fixedly connected to the vertical purlin 1 via a first fastening screw 101, further enhancing the strength, stability, and reliability of the connection. Furthermore, the vertical purlin 1 is more resistant to damage due to its excellent load-bearing properties. The first fastening screw 101 is received in the vertical groove 11 without interfering with the installation of the curtain wall panels.

[0071] In this embodiment, the internal connection portion 36 is a sliding structure that only slides with the vertical groove 11. The sliding structure cooperates with the vertical groove 11 to limit all degrees of freedom of the connecting member 3 except sliding along the extension direction of the vertical groove 11, which can improve the installation stability and reliability of the connecting member 3.

[0072] In this embodiment, each connecting portion 31 of the connecting member 3 is provided with a holding portion 39 for holding the curtain wall panel, so as to facilitate the installation of the curtain wall panel.

[0073] Example 6:

[0074] The keel connection structure of the curtain wall of this embodiment is basically the same as that of embodiment 3, the main difference is that Figure 14 As shown, the inner connecting portion 36 of the connecting member 3 in this embodiment is a plug-in structure that can be inserted into the vertical groove 11 from the notch of the vertical groove 11 , making it more convenient to install the connecting member 3 on the vertical keel 1 .

[0075] Example 7:

[0076] The keel connection structure of the curtain wall of this embodiment is basically the same as that of embodiment 1, the main difference is that Figures 15 to 17 As shown, in this embodiment, the connecting member 3 has only a second abutting portion 38 that abuts the side surface of the vertical purlin 1. The second abutting portion 38 is fixedly connected to the vertical purlin 1 via a first fastening screw 101. The tensioning mechanism includes a second tensioning screw 203, a second tensioning portion 33 elastically connected to the connecting portion 31, and two third tensioning portions 34 connected to the connecting portion 31. The second tensioning screw 203 is connected between the second tensioning portion 33 and the vertical purlin 1. The second tensioning screw 203 forces the second tensioning portion 33 to swing toward the vertical purlin 1 to tighten the inner wall of the transversely inwardly expanded groove 21. Simultaneously, the second tensioning screw 203 is located between the two third tensioning portions 34. The second tensioning screw 203 has an expansion-driving cone surface formed by providing a tapered rod section on the second tensioning screw 203. The expansion-driving cone surface forces the two third tensioning portions 34 away from each other, tightening the inner wall of the transversely inwardly expanded groove 21. During the tightening process of the second expansion screw 203, the second expansion screw 203 applies pressure on the second expansion part 33 in its axial direction, forcing the second expansion part 33 to swing toward the vertical keel 1, thereby expanding the inner wall of the transverse inward expansion groove 21; the expansion driving cone surface of the second expansion screw 203 forces the two third expansion parts 34 to move in the radial direction of the second expansion screw 203, thereby expanding the inner wall of the transverse inward expansion groove 21.

[0077] This embodiment utilizes two different expansion mechanisms to tighten the inner wall of the transversely inwardly expanded groove 21, resulting in a stronger, more stable, and more reliable expansion connection. Furthermore, a single second expansion screw 203 is employed to simultaneously tighten both the second and third expansion sections 33 and 34, resulting in lower costs, easier installation, and higher efficiency. Furthermore, the vertical purlin 1 and the connecting section 31 are also connected by the second expansion screw 203, further enhancing the strength, stability, and reliability of the connection between the connector 3 and the vertical purlin 1.

[0078] The second expansion portion 33 of this embodiment simultaneously contacts and expands the bottom wall and both side walls of the transversely inwardly expanded groove 21, while the third expansion portion 34 simultaneously contacts and expands both side walls of the transversely inwardly expanded groove 21. The second abutment portion 38 of the connector 3 of this embodiment also has a connecting through-hole through which the second expansion screw 203 passes, further enhancing the strength, stability, and reliability of the connection.

[0079] In this embodiment, the second expansion portion 33 and the third expansion portion 34 are connected to the connecting portion 31 as an integral structure. The entire connecting member 3 is made by bending a plate, which is easy to manufacture and low in cost.

[0080] Example 8:

[0081] The keel connection structure of the curtain wall of this embodiment is basically the same as that of embodiment 7, with the main difference being that the expansion mechanism in this embodiment includes a second expansion screw 203, a second expansion portion 33 elastically connected to the connection portion 31, and an arched expansion portion 35 connected to the connection portion 31, and the second expansion portion 33 is connected to the connection portion 31 through the arched expansion portion 35, and the second expansion portion 33 forces the arched expansion portion 35 to expand the inner wall of the transverse inward expansion groove 21. During the tightening process of the second expansion screw 203, the second expansion screw 203 applies pressure to the second expansion portion 33 in the direction of its axis, forcing the second expansion portion 33 to swing toward the vertical keel 1, thereby expanding the inner wall of the transverse inward expansion groove 21; at the same time, the second expansion portion 33 also presses the arched expansion portion 35 along the axis direction of the second expansion screw 203, so that the arched expansion portion 35 also expands the inner wall of the transverse inward expansion groove 21. The structure of the connecting member 3 of this embodiment is as shown in FIG. Figure 18 shown.

[0082] The second expansion screw 203 in this embodiment does not require a tapered expansion drive surface; it can be a standard, purchased component, further reducing costs. Both the second expansion portion 33 and the arched expansion portion 35 simultaneously contact and expand the bottom wall and both side walls of the laterally inwardly expanded groove 21. The arched expansion portion 35 provides an escape passage for the second expansion screw 203 to pass through, facilitating installation.

[0083] In other embodiments, the expansion mechanism may also be provided with only the second expansion portion 33 .

[0084] Example 9:

[0085] The keel connection structure of the curtain wall of this embodiment is basically the same as that of embodiment 8, the main difference is that Figure 19 and Figure 20As shown, in this embodiment, a transverse keel 2 is connected to both sides of the vertical keel 1, and the connecting member 3 is provided with a connecting portion 31 and a second fitting portion 38 that fits with the side of the vertical keel 1 corresponding to each transverse keel 2. The two second fitting portions 38 pass through the first fitting portion 37. The first fitting portion 37 fits with the front of the vertical keel 1 but is not fastened by fastening screws. Each connecting portion 31 is connected to the corresponding transverse keel 2 through an expansion mechanism.

[0086] Example 10:

[0087] The keel connection structure of the curtain wall of this embodiment is basically the same as that of embodiment 7. The main difference is that in this embodiment, a horizontal keel 2 is connected to both sides of the vertical keel 1. The connector 3 has a connecting portion 31 corresponding to each horizontal keel 2, and a second fitting portion 38 that fits the side of the vertical keel 1. The two second fitting portions 38 are connected through the first fitting portion 37. The first fitting portion 37 fits the front of the vertical keel 1 but is not fastened by fastening screws. Each connecting portion 31 is connected to the corresponding horizontal keel 2 through an expansion mechanism. The structure of the connector 3 of this embodiment is as follows. Figure 21 shown.

[0088] Example 11:

[0089] The keel connection structure of the curtain wall of this embodiment is basically the same as that of embodiment 1, the main difference is that Figure 22 As shown, the connector 3 of this embodiment does not include a supporting portion 39 for supporting the curtain wall panel. Instead, a separate supporting member 5 for supporting the curtain wall panel is provided. The supporting member 5 is fixedly connected to the transverse keel 2 via a second fastening assembly. The second fastening assembly is a second fastening screw 102, which directly connects and fastens the supporting member 5 to the transverse keel 2. In other embodiments, the supporting member 5 may also be fixedly connected to the connector 3 via the second fastening screw 102, or may be fixedly connected to both the transverse keel 2 and the connector 3 via the second fastening screw 102.

[0090] The above is only a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiment. For those skilled in the art, improvements and modifications obtained without departing from the technical concept of the present invention should also be considered as the scope of protection of the present invention.

Claims

1. A curtain wall keel connection structure, comprising a vertical keel (1), wherein one side or both sides of the vertical keel (1) are connected to a horizontal keel (2) via a connecting assembly, characterized in that: The transverse keel (2) is provided with a transverse inward-expanding groove (21), and the connecting assembly includes a connecting member (3) mounted on the vertical keel (1), and the connecting member (3) is provided with a connecting portion (31) corresponding to each transverse keel (2), and the connecting portion (31) is connected to the transverse keel (2) through an expansion mechanism that expands and cooperates with the transverse inward-expanding groove (21); the expansion mechanism includes one or more third expansion screws (204), and the third expansion screws (204) are threadedly mounted on the connecting portion (31) and cooperate with the connecting portion (31) to simultaneously expand the inner wall of the transverse inward-expanding groove (21); The connection portion (31) and the third expansion screw (204) are combined to form a sliding structure that only slides with the transverse inwardly expanded groove (21); The connecting portion (31) is a plug-in structure capable of being inserted into the transverse inwardly expanding groove (21) from the notch of the transverse inwardly expanding groove (21).

2. The curtain wall keel connection structure according to claim 1, characterized in that: The transverse keel (2) is supported on the connecting portion (31), and the connecting portion (31) is provided with a positioning portion (312) for preventing the connecting portion (31) and the transverse keel (2) from moving relative to each other in the direction of the slot opening of the transverse inwardly expanded groove (21).

3. The curtain wall keel connection structure according to claim 1, characterized in that: The connecting member (3) is fixedly mounted on the vertical keel (1) via a first fastening connection assembly, wherein the first fastening connection assembly comprises one or more first fastening screws (101) for directly connecting and fastening the vertical keel (1) and the connecting member (3); a vertical groove (11) is provided on the front surface of the vertical keel (1), and the connecting member (3) is provided with an inner connecting portion (36) accommodated in the vertical groove (11), and the inner connecting portion (36) is fixedly connected to the vertical keel (1) via at least one first fastening screw (101).

4. The curtain wall keel connection structure according to claim 3, characterized in that: The internal connection portion (36) is a plug-in structure capable of being inserted into the vertical groove (11) from the notch of the vertical groove (11).

5. The curtain wall keel connection structure according to claim 3, characterized in that: The vertical groove (11) is an inwardly expanded groove, and the internally connected portion (36) is a sliding connection structure that only slides with the vertical groove (11).

6. The curtain wall keel connection structure according to claim 3, characterized in that: The first fastening screw (101) is accommodated in the vertical groove (11).

7. The curtain wall keel connection structure according to claim 3, characterized in that: The connecting member (3) has a first fitting portion (37) fitted with the front face of the vertical keel (1), and the first fitting portion (37) is fixedly connected to the vertical keel (1) via at least one first fastening screw (101).

8. The curtain wall keel connection structure according to claim 3, characterized in that: The connecting member (3) has a second fitting portion (38) fitted with the side surface of the vertical keel (1), and the second fitting portion (38) is fixedly connected to the vertical keel (1) via at least one first fastening screw (101).

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