Connecting device and quay crane

Abstract

The utility model provides a connecting device and a quay crane. The connecting device is used for connecting a seaside upper cross beam of a quay crane and a supporting leg of a trapezoidal frame, the connecting device comprises a connecting assembly, the connecting assembly is arranged on an upper flange plate of the seaside upper cross beam, the inclination angle of the connecting assembly is the same as that of the supporting leg, and the connecting assembly is used for connecting the supporting leg; and the supporting assembly and the connecting assembly are correspondingly arranged in the seaside upper cross beam, and the supporting assembly is used for reinforcing the connecting assembly. The connecting device is simple in structure and stable in connection.

Description

Technical Field

[0001] This utility model relates to the field of lifting machinery technology, specifically to a connecting device and a quay crane. Background Technology

[0002] A quay crane, also known as a shore-based container crane, is a device used to load and unload containers from container ships at the quayside. The upper structure of the quay crane's trapezoidal frame connects to the tie rod system, while the lower structure connects to the upper crossbeam on the sea side. Because the two legs of the trapezoidal frame have circular cross-sections, while the upper crossbeam on the sea side has a rectangular cross-section, conventionally, the two legs of the trapezoidal frame are directly welded to the upper flange plate of the upper crossbeam. However, due to installation and manufacturing errors, to ensure a proper force transmission path, the upper flange plate of the upper crossbeam needs to be thickened, increasing its weight. Furthermore, to ensure stable force transmission from the trapezoidal frame legs to the upper crossbeam, multiple reinforcing ribs need to be added to the box within the connection area of ​​the upper crossbeam. The narrow space within the box within the connection area and the need for multiple reinforcing ribs result in a harsh on-site construction environment, high welding requirements, and inconvenience for subsequent painting processes. Utility Model Content

[0003] In view of this, the present invention provides a connecting device with a simple structure that can stably connect the upper crossbeam on the sea side and the legs of the trapezoidal frame while reducing the number of connection operations.

[0004] To solve at least one of the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] In a first aspect, this utility model provides a connecting device for connecting the upper crossbeam on the sea side of a quay crane to the legs of a trapezoidal frame. The connecting device includes:

[0006] The connecting assembly is installed on the upper flange plate of the sea-side upper beam. The tilt angle of the connecting assembly is the same as the tilt angle of the outrigger. The connecting assembly is used to connect the outrigger.

[0007] Support components are installed in the upper crossbeam on the sea side, corresponding to the connecting components. The support components are used to reinforce the connecting components.

[0008] In one embodiment of this utility model, the connecting component includes:

[0009] The first transverse plate is disposed on the upper flange plate;

[0010] The second transverse plate is disposed opposite to the first transverse plate on the upper flange plate, and the length direction of the first transverse plate and the second transverse plate is the same as the length direction of the upper transverse beam on the sea side.

[0011] A longitudinal plate is located between the first transverse plate and the second transverse plate and is perpendicular to the first transverse plate and the second transverse plate. The longitudinal plate is connected to the first transverse plate, the second transverse plate and the upper flange plate respectively.

[0012] The flange plate is perpendicular to the longitudinal plate, the first transverse plate and the second transverse plate, and is connected to the side end face of the longitudinal plate, the first transverse plate and the second transverse plate opposite to the upper flange plate, respectively. The flange plate is perpendicular to the length direction of the leg and is used for welding connection with the leg.

[0013] In one embodiment of this utility model, the second transverse plate and the first transverse plate are located in the same plane.

[0014] In one embodiment of this utility model, a weight-reducing through hole is provided on the flange plate.

[0015] In one embodiment of the present invention, the flange plate has four protrusions along the circumferential direction, wherein two protrusions are correspondingly arranged along the length direction of the longitudinal plate, and the other two protrusions are correspondingly arranged along the length direction of the first transverse plate and the second transverse plate, respectively.

[0016] In one embodiment of this utility model, the first transverse plate and the second transverse plate are respectively provided with notches corresponding to the weight reduction through holes on the side facing the flange plate.

[0017] In one embodiment of this utility model, the connecting component further includes:

[0018] Two first arc plates are disposed between the upper flange plate and the flange plate and are respectively connected to the upper flange plate and the flange plate. A first transverse plate is located between the two first arc plates and each first arc plate is respectively connected to the first transverse plate and the longitudinal plate.

[0019] Two second arc plates are disposed between the upper flange plate and the flange plate and are respectively connected to the upper flange plate and the flange plate. A second transverse plate is located between the two second arc plates and each second arc plate is respectively connected to the second transverse plate and the longitudinal plate.

[0020] The cylindrical structure is composed of two first arc plates and two second arc plates. The legs are hollow cylinders. The normal to the center of the cylindrical structure is collinear with the normal to the center of the legs, and the outer diameter of the cylindrical structure is the same as the outer diameter of the legs.

[0021] In one embodiment of this utility model, the support component includes:

[0022] Longitudinal stiffening plates are set in the upper crossbeam on the sea side, corresponding to the longitudinal plates, and are connected to the upper flange plate, two sets of web plates and the lower flange plate of the upper crossbeam on the sea side respectively.

[0023] The first transverse stiffening plate has the same length direction as the seaside upper crossbeam. The first transverse stiffening plate and the first transverse plate are respectively set in the seaside upper crossbeam and connected to the upper flange plate and the longitudinal stiffening plate.

[0024] The second transverse stiffening plate has the same length direction as the upper crossbeam on the sea side. The second transverse stiffening plate is set inside the upper crossbeam on the sea side and is located on the side of the longitudinal stiffening plate away from the first transverse stiffening plate. The second transverse stiffening plate is connected to the upper flange plate and the longitudinal stiffening plate.

[0025] In one embodiment of this utility model, two reinforcing ribs are provided on the side of the longitudinal stiffening plate facing the first transverse stiffening plate, and the longitudinal stiffening plate is inclined.

[0026] A second aspect of this utility model also provides a quay bridge, including the connecting device described in any of the above embodiments.

[0027] The above-mentioned technical solution of this utility model has at least one of the following beneficial effects:

[0028] The connecting device of this utility model connects the upper crossbeam on the sea side and the legs of the trapezoidal frame by setting a connecting component between them. Compared with the direct connection of the legs to the upper crossbeam on the sea side, it is not necessary to thicken the upper flange plate of the upper crossbeam on the sea side, thereby reducing the structural weight of the upper flange plate of the upper crossbeam on the sea side. At the same time, by setting a support component inside the upper crossbeam on the sea side, the structure is simple and easy to install. It ensures that the force on the legs can be stably transmitted to the upper crossbeam on the sea side while reducing the connection operation steps. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the connecting device connecting the upper crossbeam on the connecting side and the support leg of the trapezoidal frame in one embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the connecting device in one embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the first transverse plate in the connecting device in one embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the second transverse plate in the connecting device in one embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the longitudinal plate in the connecting device in one embodiment of the present invention;

[0034] Figure 6 for Figure 2 A schematic diagram of the structure of the connecting device AA in the middle;

[0035] Figure 7 for Figure 6 Schematic diagram of the structure of the connecting device MM direction;

[0036] Figure 8 This is a schematic diagram of the structure of the first transverse stiffening plate in the connecting device in one embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of the second transverse stiffening plate in the connecting device in one embodiment of the present invention.

[0038] Figure label:

[0039] 101. Upper crossbeam on the sea side; 102. Outrigger; 103. Upper flange plate;

[0040] 200. Connecting assembly; 210. First transverse plate; 220. Second transverse plate; 230. Longitudinal plate; 240. Flange plate; 241. Protrusion; 260. First arc plate; 270. Second arc plate;

[0041] 300, Support assembly; 310, Longitudinal stiffening plate; 311, Reinforcing rib; 320, First transverse stiffening plate; 330, Second transverse stiffening plate. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0043] The following is a detailed description of a connection device according to an embodiment of the present invention, with reference to the accompanying drawings.

[0044] like Figure 1 and Figure 2 As shown, this utility model provides a connecting device for connecting the seaside upper crossbeam 101 of a quay crane to the legs 102 of a trapezoidal frame. The connecting device includes a connecting component 200 and a supporting component 300. The connecting component 200 is disposed on the upper flange plate 103 of the seaside upper crossbeam 101, and the inclination angle of the connecting component 200 is the same as the inclination angle of the legs 102. The connecting component 200 is used to connect the legs 102. The supporting component 300 is disposed correspondingly within the seaside upper crossbeam 101 and is used to reinforce the connecting component 200.

[0045] In this embodiment, a connecting component 200 with the same inclination angle as the support leg 102 is provided between the upper flange plate 103 of the sea-side upper crossbeam 101 and the support leg 102 of the trapezoidal frame to connect the sea-side upper crossbeam 101 and the support leg 102 of the trapezoidal frame. Compared with the support leg 102 being directly connected to the sea-side upper crossbeam 101, it is not necessary to thicken the upper flange plate 103 of the sea-side upper crossbeam 101, thereby reducing the structural weight of the upper flange plate 103 of the sea-side upper crossbeam 101. At the same time, by providing a support component 300 inside the sea-side upper crossbeam 101, the structure is simple and easy to install. While ensuring that the force on the support leg 102 can be stably transmitted to the sea-side upper crossbeam 101, the connection operation steps are reduced.

[0046] like Figures 2-5 As shown, the connecting assembly 200 includes: a first transverse plate 210, a second transverse plate 220, a longitudinal plate 230, and a flange plate 240. The first transverse plate 210 is disposed on the upper flange plate 103; the first transverse plate 210 and the second transverse plate 220 are disposed opposite each other on the upper flange plate 103, and the length direction of the first transverse plate 210 and the second transverse plate 220 is the same as the length direction of the upper crossbeam 101 on the sea side; the longitudinal plate 230 is located between the first transverse plate 210 and the second transverse plate 220 and is perpendicular to the first transverse plate 210 and the second transverse plate 220, and the longitudinal plate 230 is connected to the first transverse plate 210, the second transverse plate 220 and the upper flange plate 103 respectively; the flange plate 240 is perpendicular to the longitudinal plate 230, the first transverse plate 210 and the second transverse plate 220, and is connected to the side end face of the longitudinal plate 230, the first transverse plate 210 and the second transverse plate 220 away from the upper flange plate 103 respectively, the flange plate 240 is perpendicular to the length direction of the support leg 102, and the flange plate 240 is used for welding connection with the support leg 102.

[0047] In this embodiment, the first transverse plate 210 and the second transverse plate 220 together provide lateral stiffening. Arranged along the length of the seaside upper crossbeam 101, the first transverse plate 210 and the second transverse plate 220 effectively resist shear force and bending moment along this direction. Simultaneously, the symmetrical arrangement of the first transverse plate 210 and the second transverse plate 220 allows the longitudinal plate 230 to be securely embedded within them. Furthermore, the longitudinal plate 230, perpendicular to the first transverse plate 210 and the second transverse plate 220, serves to connect and bear vertical forces, while also extending as a connecting surface to the plane of the flange plate 240. The longitudinal plate 230 is also welded to the upper flange plate 103, further enhancing the overall connection rigidity between the connecting assembly 200 and the seaside upper crossbeam 101. The flange plate 240, as the plate connecting the support leg 102, achieves multi-path force transmission through perpendicular welding to the end faces of the first transverse plate 210, the second transverse plate 220, and the longitudinal plate 230. This not only improves overall stability but also facilitates control of welding precision during manufacturing and installation.

[0048] like Figure 6 and Figure 7 As shown, the second transverse plate 220 and the first transverse plate 210 are located in the same plane.

[0049] In this embodiment, since the second transverse plate 220 and the first transverse plate 210 are located in the same plane, and the longitudinal plate 230 is perpendicular to the first transverse plate 210 and the second transverse plate 220, the first transverse plate 210, the second transverse plate 220, and the longitudinal plate 230 together form a cross-shaped rigid structure. This cross-shaped rigid structure allows each plate to not only bear force individually but also share external loads through mutual support. When the upper flange plate 103 corresponding to the longitudinal plate 230 is subjected to pressure or bending moment from the support leg 102, the first transverse plate 210 and the second transverse plate 220 can effectively distribute the load to other parts of the upper flange plate 103. Simultaneously, the longitudinal plate 230 between the first transverse plate 210 and the second transverse plate 220 can also resist shear and limit lateral deformation in the vertical direction. Furthermore, the cross shape also possesses good symmetry and balance in its construction, effectively avoiding problems such as local buckling or weld stress concentration caused by insufficient stiffness on one side. This ensures that the weld between the flange and the support leg 102 can withstand higher working loads and extend service life. In addition, the design of the three plates intersecting in the same plane during the welding process facilitates positioning, assembly and welding, reducing welding difficulty while improving assembly accuracy and construction efficiency.

[0050] like Figure 7 As shown, a weight-reducing through-hole is provided on the flange plate 240. The flange plate 240 can be circular, and the weight-reducing through-hole can be coaxial with the flange plate 240. This can reduce the structural weight of the component.

[0051] like Figure 7 As shown, the flange plate 240 has four protrusions 241 formed along the circumferential direction, two of which are arranged correspondingly along the length direction of the longitudinal plate 230, and the other two protrusions 241 are arranged correspondingly along the length direction of the first transverse plate 210 and the second transverse plate 220, respectively.

[0052] In this embodiment, the four protrusions 241 arranged along the circumferential direction of the flange plate 240 correspond to the cross-shaped rigid structure formed by the first transverse plate 210, the second transverse plate 220, and the longitudinal plate 230. Specifically, two of the protrusions 241 arranged along the length of the longitudinal plate 230 are aligned with the main stress direction of the longitudinal plate 230 in terms of structure. After the support leg 102 is welded to the flange plate 240, the pressure and shear force transmitted to the longitudinal plate 230 can be directly transmitted to the longitudinal plate 230 through these two protrusions 241. Furthermore, the other two protrusions 241 correspond to the directions of the first transverse plate 210 and the second transverse plate 220, respectively, which not only enhances the transverse connection area of ​​the flange plate 240 but also improves the anchoring effect between the first transverse plate 210, the second transverse plate 220, and the flange plate 240. This ensures that the flange plate 240 and the support leg 102 maintain good connection stability and reduces the risk of deformation and fatigue damage. Furthermore, by providing four protrusions 241, more space can be provided for the weld arrangement, allowing the welding process to be carried out in multiple directions, thereby increasing the total length of the weld and improving the welding strength and reliability.

[0053] like Figure 3 and Figure 4 As shown, the first transverse plate 210 and the second transverse plate 220 have notches corresponding to the weight-reducing through holes on the side facing the flange plate 240. Similarly, the longitudinal plate 230 can also have notches corresponding to the weight-reducing through holes on the side facing the flange plate 240. This can further reduce the structural weight of the component.

[0054] like Figure 7 As shown, the connecting assembly 200 also includes two first arc plates 260 and two second arc plates 270. Two first arc plates 260 are disposed between the upper flange plate 103 and the flange plate 240 and are respectively connected to the upper flange plate 103 and the flange plate 240. A first transverse plate 210 is located between the two first arc plates 260 and each first arc plate 260 is respectively connected to the first transverse plate 210 and the longitudinal plate 230. Two second arc plates 270 are disposed between the upper flange plate 103 and the flange plate 240 and are respectively connected to the upper flange plate 103 and the flange plate 240. A second transverse plate 220 is located between the two second arc plates 270 and each second arc plate 270 is respectively connected to the second transverse plate 220 and the longitudinal plate 230. The two first arc plates 260 and the two second arc plates 270 form a cylindrical structure. The support leg 102 is a hollow cylinder. The normal line of the center of the cylindrical structure is collinear with the normal line of the center of the support leg 102, and the outer diameter of the cylindrical structure is the same as the outer diameter of the support leg 102.

[0055] In this embodiment, two first arc plates 260 are arranged on both sides of the first transverse plate 210 and form a multi-faceted welded connection with the longitudinal plate 230 and the flange plate 240, which can achieve encasing stiffening and positioning support. Similarly, two first arc plates 260 are located on both sides of the second transverse plate 220 and are connected to the longitudinal plate 230 and the flange plate 240 in the same way. The symmetrical arrangement of the two first arc plates 260 not only ensures the axial force balance of the structure, but also prevents deformation or fatigue failure caused by local stress concentration. Secondly, the normal line of the center of the cylindrical structure formed by the two first arc plates 260 and the two first arc plates 260 is collinear with the normal line of the center of the leg 102, and the outer diameter is the same as the outer diameter of the leg 102, which can ensure the coaxiality of the welding or transition connection and the consistency of stress transmission. In addition, the cylindrical structure can also increase the length and contact area of ​​the circumferential weld in the area where the flange plate 240 connects with the leg 102, which is beneficial for distributing the load, improving the welding strength, and extending the service life of the structure when the leg 102 is under greater stress.

[0056] like Figure 2 , Figure 8 and Figure 9 As shown, the support assembly 300 includes: a longitudinal stiffening plate 310 and a first transverse stiffening plate 320. The longitudinal stiffening plate 310 and the longitudinal plate 230 are respectively disposed within the seaside upper crossbeam 101 and are connected to the upper flange plate 103, the two sets of web plates and the lower flange plate of the seaside upper crossbeam 101. The length direction of the first transverse stiffening plate 320 is the same as the length direction of the seaside upper crossbeam 101. The first transverse stiffening plate 320 and the first transverse plate 210 are respectively disposed within the seaside upper crossbeam 101 and are connected to the upper flange plate 103 and the longitudinal stiffening plate 310. The length direction of the second transverse stiffening plate 330 is the same as the length direction of the seaside upper crossbeam 101. The second transverse stiffening plate 330 and the second transverse plate 220 are respectively disposed within the seaside upper crossbeam 101 and are located on the side of the longitudinal stiffening plate 310 away from the first transverse stiffening plate 320. The second transverse stiffening plate 330 is connected to the upper flange plate 103 and the longitudinal stiffening plate 310.

[0057] In this embodiment, the longitudinal stiffening plate 310 and the longitudinal plate 230 are correspondingly arranged within the seaside upper crossbeam 101, and are respectively connected to the upper flange plate 103, the two sets of web plates, and the lower flange plate of the seaside upper crossbeam 101. This enhances the local compressive and bending resistance of the seaside upper crossbeam 101 at the connection point with the leg 102, and can also stably and efficiently transmit the axial pressure and bending moment from the leg 102. The first transverse stiffening plate 320 is correspondingly arranged with the first transverse plate 210, enhancing the transverse rigidity of the seaside upper crossbeam 101, and can effectively resist the local deformation caused by the load transfer between the first transverse plate 210 and the flange plate 240. The second transverse stiffening plate 330 is correspondingly arranged with the second transverse plate 220 and is located on the side of the longitudinal stiffening plate 310 away from the first transverse stiffening plate 320, that is, forming symmetrical support on the other side of the longitudinal stiffening plate 310. This allows for symmetrical stiffening with the first transverse stiffening plate 320, improving the deformation resistance of the component.

[0058] like Figure 2 and Figure 6 As shown, two reinforcing ribs 311 are provided on the side of the longitudinal stiffening rib 310 facing the first transverse stiffening rib 320, and the longitudinal stiffening rib 310 is inclined. By providing two reinforcing ribs 311, the buckling resistance of the longitudinal stiffening rib 310 can be improved. Figure 2 For reference, the connecting component 200 and the longitudinal stiffener 310 are inclined in the same direction, and the inclination angle of the longitudinal stiffener 310 can be smaller than the inclination angle of the connecting component 200. In addition, the lower end of the longitudinal stiffener 310 is closer to the end of the seaside upper beam 101 than the upper end, so that the vertical load transmitted from the support leg 102 can be quickly and distributed to the entire beam structure of the seaside upper beam 101.

[0059] A second aspect of this utility model also provides a quay bridge, including the connecting device described in any of the above embodiments.

[0060] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "connected" or "linked," etc., are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0061] The above are preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A connection device, characterized in that The connection device for linking the seaside upper crossbeam of a quay crane to the legs of the trapezoidal frame includes: A connecting assembly is disposed on the upper flange plate of the sea-side upper crossbeam, the tilt angle of the connecting assembly is the same as the tilt angle of the outrigger, and the connecting assembly is used to connect the outrigger. A support component is provided, corresponding to the connecting component, within the upper crossbeam on the sea side, and the support component is used to reinforce the connecting component.

2. The connection device according to claim 1, characterized in that The connection component includes: A first transverse plate, the first transverse plate being disposed on the upper flange plate; The second transverse plate is disposed opposite to the first transverse plate on the upper flange plate, and the length direction of the first transverse plate and the second transverse plate is the same as the length direction of the upper transverse beam on the sea side. A longitudinal plate, which is located between the first transverse plate and the second transverse plate and is perpendicular to the first transverse plate and the second transverse plate, and is connected to the first transverse plate, the second transverse plate and the upper flange plate respectively; A flange plate, which is perpendicular to the longitudinal plate, the first transverse plate and the second transverse plate, and is connected to the side end face of the longitudinal plate, the first transverse plate and the second transverse plate opposite to the upper flange plate, respectively. The flange plate is perpendicular to the length direction of the leg and is used for welding connection with the leg.

3. The connection device according to claim 2, characterized in that The second transverse plate is located in the same plane as the first transverse plate.

4. The connection device according to claim 3, characterized in that The flange plate is provided with weight reduction through holes.

5. The connection device of claim 3, wherein The flange plate has four protrusions along the circumferential direction, two of which are arranged correspondingly along the length direction of the longitudinal plate, and the other two are arranged correspondingly along the length directions of the first transverse plate and the second transverse plate, respectively.

6. The connection device of claim 4, wherein The first transverse plate and the second transverse plate are respectively provided with notches corresponding to the weight reduction through holes on the side facing the flange plate.

7. The connection device of claim 3, wherein The connection component also includes: Two first arc plates are disposed between the upper flange plate and the flange plate and are respectively connected to the upper flange plate and the flange plate. A first transverse plate is located between the two first arc plates and each first arc plate is respectively connected to the first transverse plate and the longitudinal plate. Two second arc plates are disposed between the upper flange plate and the flange plate and are respectively connected to the upper flange plate and the flange plate; a second transverse plate is located between the two second arc plates and each second arc plate is respectively connected to the second transverse plate and the longitudinal plate. The two first arc plates and the two second arc plates form a cylindrical structure. The support leg is a hollow cylinder. The normal to the center of the cylindrical structure is collinear with the normal to the center of the support leg, and the outer diameter of the cylindrical structure is the same as the outer diameter of the support leg.

8. The connection device of claim 4, wherein The support components include: Longitudinal stiffening plate, the longitudinal stiffening plate and the longitudinal plate are respectively arranged in the upper crossbeam on the sea side, and are respectively connected to the upper flange plate, two sets of web plates and lower flange plate of the upper crossbeam on the sea side; The first transverse stiffening plate has the same length direction as the seaside upper crossbeam. The first transverse stiffening plate and the first transverse plate are respectively arranged in the seaside upper crossbeam and are connected to the upper flange plate and the longitudinal stiffening plate. The second transverse stiffening plate has the same length direction as the upper crossbeam on the sea side. The second transverse stiffening plate is correspondingly disposed in the upper crossbeam on the sea side and is located on the side of the longitudinal stiffening plate away from the first transverse stiffening plate. The second transverse stiffening plate is connected to the upper flange plate and the longitudinal stiffening plate.

9. The connection device according to claim 8, characterized in that The longitudinal stiffener plate has two reinforcing ribs on the side facing the first transverse stiffener plate; The longitudinal stiffening plates are inclined.

10. A shore-based crane, characterized in that, Includes the connecting device as described in any one of claims 1 to 9.

Images