Portal crane

Abstract

The portal crane comprises a frame body, the top of the frame body is provided with a hoisting platform, and the hoisting platform is provided with a hoisting hole penetrating through the hoisting platform in the vertical direction; the hoisting vehicle body is arranged on the hoisting platform in a sliding mode in the first direction, and a hoisting tool of the hoisting vehicle body downwards penetrates through the hoisting hole; the two protection parts are arranged on the hoisting platform, the two protection parts are located on the two sides of the hoisting hole in the second direction and are adjacent to the hoisting hole, each protection part comprises a first part and a second part, and one end of the first part and one end of the second part are connected with the first end part and the second end part of the hoisting vehicle body in the first direction correspondingly; and the first part and the second part can move along with the hoisting vehicle body in the first direction. Therefore, according to the portal crane disclosed by the invention, the safety of high-altitude edge operation when personnel carry out equipment overhaul and maintenance and walk on the hoisting platform can be improved.

Description

Technical Field

[0001] This invention relates to the field of crane technology, and more specifically to a gantry crane. Background Technology

[0002] In double-girder gantry cranes, to facilitate trolley movement, no safety railings or other safety measures are installed on the inner side of the trolley platform. During routine inspections and maintenance, workers walking on the trolley platform face a risk of falling from height. Installing guardrails or fences also presents risks of falls from height and falling objects from above. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art. To this end, embodiments of the present invention provide a gantry crane.

[0004] The gantry crane of this invention includes:

[0005] The frame has a hoisting platform at its top, and the hoisting platform has a hoisting hole that extends through it in the vertical direction. The length direction of the hoisting hole is a first direction, and the width direction of the hoisting hole is a second direction. Any two of the first direction, the second direction, and the vertical direction are perpendicular to each other.

[0006] A lifting vehicle body is slidably mounted on the lifting platform along the first direction, and the lifting device of the lifting vehicle body passes downward through the lifting hole;

[0007] Two protective sections are provided on the hoisting platform. The two protective sections are located on both sides of the hoisting hole and adjacent to the hoisting hole in the second direction. Each protective section includes a first part and a second part. The first part and the second part are located on both sides of the hoisting vehicle body in the first direction. The ends of the first part and the second part away from the hoisting vehicle body in the first direction are respectively located on both sides of the hoisting hole in the first direction. One end of the first part and one end of the second part are respectively connected to the first end and the second end of the hoisting vehicle body in the first direction. The first part and the second part can move with the hoisting vehicle body in the first direction.

[0008] Therefore, the gantry crane according to the embodiments of the present invention can improve the safety of personnel working at heights near edges when carrying out equipment maintenance and walking on the hoisting platform.

[0009] In some embodiments, the hoisting platform is provided with two sets of fixing members, which are respectively located on both sides of the hoisting hole in the second direction. Each set of fixing members includes a first fixing post and a second fixing post located on both sides of the hoisting hole in the first direction. The first fixing post and the second fixing post both extend in the vertical direction. The two protective parts cooperate with the two sets of fixing members respectively. The first part of the protective part cooperates with the first fixing post of the corresponding fixing member, and the second part of the protective part cooperates with the second fixing post of the corresponding fixing member. The first end of the hoisting vehicle body is located between the second end and the first fixing post in the first direction.

[0010] In some embodiments, both the first fixed post and the second fixed post are provided with guide wheel sets, and each guide wheel set includes at least two guide wheels that are spaced apart in the vertical direction;

[0011] Each of the protective parts includes a first rope, and the first part and the second part of the protective part are each composed of two rope segments of the first rope;

[0012] A portion of the first rope is located below the hoisting vehicle body. Both ends of the first rope pass through the guide wheel assemblies on the first and second fixed columns, respectively, and are connected to the first and second ends of the hoisting vehicle body. The first rope is fitted onto the guide wheel assemblies of the corresponding first and second fixed columns, and the guide wheels of the guide wheel assemblies are used to guide the first rope.

[0013] In some embodiments, there are multiple first ropes, with one of two adjacent first ropes wrapping around at least a portion of the outside of the other.

[0014] Both the first fixed post and the second fixed post are provided with a plurality of guide wheel sets, and the plurality of guide wheel sets of each of the first fixed post and the second fixed post respectively cooperate with a plurality of the first rope bodies.

[0015] In some embodiments, each guide wheel assembly includes two guide wheels spaced apart in the vertical direction, and the plurality of guide wheel assemblies on each of the first fixed column and the second fixed column include a first guide wheel assembly and a second guide wheel assembly. The two guide wheels of the first guide wheel assembly are located between the two guide wheels of the second guide wheel assembly in the vertical direction, and the two guide wheels of the first guide wheel assembly are located between the two guide wheels of the second guide wheel assembly and the hoisting vehicle body in the first direction.

[0016] Each of the first end and the second end of the hoisting vehicle body is connected to the end of the first rope by at least one of an elastic element and a tensioner;

[0017] The seat of the guide wheel is connected to the fixed column via a tensioner.

[0018] In some embodiments, the first part of each of the protective parts includes a first take-up device and a first tensioning rope. The first take-up device is disposed on the first end of the hoisting vehicle body, and the two ends of the first tensioning rope are respectively disposed on the first take-up device and the first fixing post. The first take-up device is used to take up and release and tension the first tensioning rope.

[0019] The second part of each of the protective sections includes a second take-up device and a second tensioning rope. The second take-up device is located on the second end of the hoisting vehicle body, and the two ends of the second tensioning rope are respectively located on the second take-up device and the second fixing post. The second take-up device is used to take up and release and tension the second tensioning rope.

[0020] In some embodiments, the first portion of each protective part includes a plurality of first take-up devices and a plurality of first tensioning cords, wherein the plurality of first take-up devices are respectively connected to the plurality of first tensioning cords, and the plurality of first tensioning cords of each protective part are spaced apart in the vertical direction.

[0021] The second part of each of the protective sections includes a plurality of second take-up devices and a plurality of second tensioning ropes, the plurality of second take-up devices being connected to the plurality of second tensioning ropes respectively, and the plurality of second tensioning ropes of each of the protective sections being spaced apart in the vertical direction.

[0022] In some embodiments, the first part of each of the protective parts is a first folding fence, the first folding fence is retractable in the first direction, and the two ends of the first folding fence in the first direction are respectively connected to the first end of the hoisting vehicle body and the first fixed column;

[0023] The second part of each of the protective sections is a second folding fence, which is retractable in the first direction. The two ends of the second folding fence in the first direction are respectively connected to the second end of the hoisting vehicle body and the second fixed column.

[0024] In some embodiments, each of the first folding fence and the second folding fence includes a plurality of folding segments, each folding segment including a connected first link and a second link;

[0025] The first link can slide relative to the second link in the first direction; or,

[0026] The first link and the second link are hinged together by a hinge shaft, the axis of which is the second direction.

[0027] In some embodiments, both the first fixing column and the second fixing column are detachably connected to the hoisting platform;

[0028] The hoisting platform is provided with a track that mates with the wheels of the hoisting vehicle. The track extends along the first direction, and the first fixed column and the second fixed column are located on both sides of the track in the first direction.

[0029] Both the first folding fence and the second folding fence include support rods extending in the vertical direction. Two adjacent folding sections in the first direction are connected by the support rods. The bottom of the support rods is provided with support wheels. The support wheels and the wheels of the hoisting vehicle are both fitted on the track. Attached Figure Description

[0030] Figure 1 This is a top view of a gantry crane according to an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of a gantry crane according to an embodiment of the present invention.

[0032] Figure 3 This is a schematic diagram of a gantry crane according to another embodiment of the present invention.

[0033] Figure 4 This is a schematic diagram of a gantry crane according to another embodiment of the present invention.

[0034] Figure label:

[0035] 1. Lifting platform;

[0036] 2. Lifting hole;

[0037] 3. Lifting vehicle body, 31. First end, 32. Second end;

[0038] 41. First fixed post; 42. Second fixed post;

[0039] 5. First rope body; 51. Guide wheel; 52. Elastic element; 53. Tensioner;

[0040] 61. First take-up device; 62. First tension rope; 63. Second take-up device; 64. Second tension rope;

[0041] 71. First folding fence; 72. Second folding fence; 73. Folding section; 74. First connecting rod; 75. Second connecting rod; 76. Support rod;

[0042] 8. Track. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0044] The gantry crane according to embodiments of the present invention will now be described with reference to the accompanying drawings. Figures 1 to 4 As shown, the gantry crane according to an embodiment of the present invention includes a frame, a lifting vehicle body 3, and two protective sections.

[0045] The top of the frame is equipped with a hoisting platform 1, which has a hoisting hole 2 extending vertically through it. The length direction of the hoisting hole 2 is a first direction, and the width direction is a second direction. Any two of the first, second, and vertical directions are perpendicular to each other. A hoisting vehicle 3 is slidably mounted on the hoisting platform 1 along the first direction, and the lifting device of the hoisting vehicle 3 passes downward through the hoisting hole 2. Specifically, a guardrail is provided along the outer edge of the hoisting platform 1 to prevent workers from falling from the outer edge of the hoisting platform 1. During the sliding of the hoisting vehicle 3 in the first direction, the hoisting rope can move along the first direction within the hoisting hole 2.

[0046] The first direction can be left-right, and the second direction can be front-back. The left-right, front-back, and up-down directions are shown by arrows in the figure. For example, the lifting vehicle body 3 is slidably mounted on the lifting platform 1 along the left-right direction. The length direction of the lifting hole 2 is the left-right direction, and the width direction of the lifting hole 2 is the front-back direction.

[0047] Two protective sections are installed on the hoisting platform 1, positioned on both sides of and adjacent to the hoisting hole 2 in the second direction. This allows the hoisting hole 2 to be located between the two protective sections in the second direction, thus protecting workers and reducing the risk of them falling into the hoisting hole 2. For example, the two protective sections can be positioned on both sides of and adjacent to the hoisting hole 2 in the front-to-back direction.

[0048] Each protective section includes a first part and a second part, which are located on both sides of the lifting vehicle body 3 in a first direction. The ends of the first part and the second part that are away from the lifting vehicle body 3 in the first direction are respectively located on both sides of the lifting hole 2 in the first direction. That is to say, the first part and the second part can block the lifting holes 2 located on both sides of the lifting vehicle body 3, so that the first part and the second part of the protective section can respectively protect both sides of the lifting hole 2 in a second direction.

[0049] One end of the first part and one end of the second part are respectively connected to the first end 31 and the second end 32 of the hoisting vehicle body 3 in the first direction. The first part and the second part can move with the hoisting vehicle body 3 in the first direction. Thus, during the movement of the hoisting vehicle body 3 in the first direction, the first part and the second part can extend / fold in the first direction to block the hoisting holes 2 on both sides of the hoisting vehicle body 3.

[0050] like Figure 1 As shown, in some embodiments, the lifting platform 1 is provided with two sets of fixing members. The two sets of fixing members are located on both sides of the lifting hole 2 in the second direction. Each set of fixing members includes a first fixing post 41 and a second fixing post 42 located on both sides of the lifting hole 2 in the first direction. Both the first fixing post 41 and the second fixing post 42 extend in the vertical direction. Two protective parts cooperate with the two sets of fixing members respectively. The first part of the protective part cooperates with the first fixing post 41 of the corresponding fixing member, and the second part of the protective part cooperates with the second fixing post 42 of the corresponding fixing member. The first end 31 of the lifting vehicle body 3 is located between the second end 32 and the first fixing post 41 in the first direction. For example, the two sets of fixing members are located on both sides of the lifting hole 2 in the front-rear direction, and the first fixing post 41 is located to the left of the second fixing post 42. For example, the two sets of fixing members are located on both sides of the lifting hole 2 in the front-rear direction, and each set of fixing members includes a first fixing post 41 and a second fixing post 42 located on both sides of the lifting hole 2 in the left-right direction.

[0051] In some embodiments, both the first fixing column 41 and the second fixing column 42 are detachably connected to the lifting platform 1, thereby facilitating the disassembly of the first fixing column 41 and the second fixing column 42. For example, the lifting platform 1 is provided with screw holes, through which the first fixing column 41 and the second fixing column 42 are threadedly connected to the lifting platform 1.

[0052] like Figure 2 As shown, in some embodiments, both the first fixed post 41 and the second fixed post 42 are provided with guide wheel assemblies, and each guide wheel assembly includes at least two guide wheels 51 spaced apart in the vertical direction. Specifically, each guide wheel assembly includes two guide wheels 51 spaced apart in the vertical direction.

[0053] Each protective section includes a first rope body 5, and the first part and the second part of the protective section are each composed of two rope segments of the first rope body 5. Specifically, the rope segments at both ends of the first rope body 5 constitute the first part and the second part of the protective section, respectively.

[0054] A portion of the first rope 5 is located below the hoisting vehicle body 3. Both ends of the first rope 5 pass through guide wheel assemblies (guide wheels 51) on the first fixed post 41 and the second fixed post 42, respectively, and are connected to the first end 31 and the second end 32 of the hoisting vehicle body 3. The first rope 5 is fitted onto the corresponding guide wheel assemblies of the first fixed post 41 and the second fixed post 42. The guide wheels 51 of the guide wheel assemblies guide the first rope 5. Specifically, the first rope 5 and the hoisting vehicle body 3 can form a ring structure. When the hoisting vehicle body 3 moves in the first direction, the first rope 5 can move under the guidance of the guide wheel assemblies (guide wheels 51) on the first fixed post 41 and the second fixed post 42, so that the first rope 5 is always positioned between the first fixed post 41 and the second fixed post 42 and the hoisting vehicle body 3 in the first direction, thereby sealing the space between the first fixed post 41 and the second fixed post 42 and the hoisting vehicle body 3, and thus forming a barrier on the side of the hoisting hole 2.

[0055] like Figure 2 As shown, in some embodiments, there are multiple first ropes 5, with one of two adjacent first ropes 5 wrapping around at least a portion of the outside of the other. The multiple first ropes 5 are connected to the crane body 3 and form multiple wrapping structures to increase the sealing density and prevent interference between adjacent first ropes 5.

[0056] Both the first fixed post 41 and the second fixed post 42 are provided with multiple guide wheel sets, and each of the multiple guide wheel sets in the first fixed post 41 and the second fixed post 42 corresponds to one of the multiple first ropes 5. That is to say, the first fixed post 41 and the second fixed post 42 are provided with guide wheel sets that cooperate with each first rope 5.

[0057] In some embodiments, the plurality of guide wheel groups on each of the first fixed column 41 and the second fixed column 42 include a first guide wheel group and a second guide wheel group. Two guide wheels 51 of the first guide wheel group are located between two guide wheels 51 of the second guide wheel group in the vertical direction, and two guide wheels 51 of the first guide wheel group are located between two guide wheels 51 of the second guide wheel group and the lifting vehicle body 3 in a first direction. This allows the two guide wheels 51 of the first guide wheel group to be located outside the two guide wheels 51 of the second guide wheel group in the inward and outward directions, thereby allowing the first rope 5 mated on the first guide wheel group to be located outside the first rope 5 mated on the second guide wheel group.

[0058] In some embodiments, each of the first end 31 and the second end 32 of the hoisting vehicle body 3 is connected to both ends of the first rope 5 via at least one of the elastic element 52 and the tensioner 53. Specifically, each of the first end 31 and the second end 32 of the hoisting vehicle body 3 is sequentially connected to the end of the first rope 5 via at least one of the elastic element 52 and the tensioner 53. The tensioner 53 allows the first rope 5 to reach a certain preload tension, keeping the wire rope 4 taut at all times and maintaining the tension of the first rope 5. For example, the elastic element 52 is a spring.

[0059] In some embodiments, the seat of the guide wheel 51 is connected to the fixed post via a tensioner 53, thereby further increasing the tension of the first rope 5.

[0060] like Figure 3 As shown, in some embodiments, the first part of each protective section includes a first take-up reel 61 and a first tensioning rope 62. The first take-up reel 61 is disposed on the first end 31 of the hoisting vehicle body 3, and the two ends of the first tensioning rope 62 are respectively disposed on the first take-up reel 61 and the first fixing post 41. The first take-up reel 61 is used to take in, release, and tension the first tensioning rope 62. The first take-up reel 61 can take in, release, and tension the first tensioning rope 62, thereby enabling the first tensioning rope 62 to seal the space between the first end 31 and the first fixing post 41.

[0061] The second part of each protective section includes a second take-up reel 63 and a second tension rope 64. The second take-up reel 63 is located on the second end 32 of the hoisting vehicle body 3. The two ends of the second tension rope 64 are respectively located on the second take-up reel 63 and the second fixed post 42. The second take-up reel 63 is used to take in, release, and tension the second tension rope 64. The second take-up reel 63 can take in, release, and tension the second tension rope 64, thereby allowing the second tension rope 64 to seal the space between the second end 32 and the second fixed post 42. Thus, when the hoisting vehicle body 3 moves in the first direction, the first take-up reel 61 can retract the first tension rope 62, and the second take-up reel 63 can release the first tension rope 62, or the first take-up reel 61 can release the first tension rope 62, and the second take-up reel 63 can retract the first tension rope 62. For example, when the crane body 3 moves to the left, the first take-up reel 61 retracts the first tension rope 62, and the second take-up reel 63 releases the first tension rope 62; when the crane body 3 moves to the right, the first take-up reel 61 releases the first tension rope 62, and the second take-up reel 63 retracts the first tension rope 62. For example, both the first take-up reel 61 and the second take-up reel 63 are spring reel devices that automatically retract and extend cables or hoses by storing spring energy. The spring reel device includes a coil spring and a braking device.

[0062] like Figure 3As shown, in some embodiments, the first part of each protective section includes a plurality of first take-up coils 61 and a plurality of first tensioning cords 62, with the plurality of first take-up coils 61 respectively connected to the plurality of first tensioning cords 62, and the plurality of first tensioning cords 62 of each protective section being spaced apart in the vertical direction. The second part of each protective section includes a plurality of second take-up coils 63 and a plurality of second tensioning cords 64, with the plurality of second take-up coils 63 respectively connected to the plurality of second tensioning cords 64, and the plurality of second tensioning cords 64 of each protective section being spaced apart in the vertical direction. The plurality of first tensioning cords 62 and the plurality of second tensioning cords 64 can increase the protective density of the protective section.

[0063] like Figure 4 As shown, in some embodiments, the first part of each protective section is a first folding fence 71, which is retractable in a first direction. The two ends of the first folding fence 71 in the first direction are respectively connected to the first end 31 of the hoisting vehicle body 3 and the first fixed post 41. The second part of each protective section is a second folding fence 72, which is retractable in the first direction. The two ends of the second folding fence 72 in the first direction are respectively connected to the second end 32 of the hoisting vehicle body 3 and the second fixed post 42.

[0064] The first folding barrier 71 can block the space between the first end 31 and the first fixed post 41, and the second folding barrier 72 can block the space between the second end 32 and the second fixed post 42. Both the first folding barrier 71 and the second folding barrier 72 are foldable and extendable. Therefore, when the hoisting vehicle 3 moves in the first direction, the first folding barrier 71 folds and retracts while the second folding barrier 72 extends, or vice versa. For example, when the hoisting vehicle 3 moves to the left, the first folding barrier 71 folds and retracts while the second folding barrier 72 extends; when the hoisting vehicle 3 moves to the right, the first folding barrier 71 extends while the second folding barrier 72 folds and retracts.

[0065] In some embodiments, each of the first folding fence 71 and the second folding fence 72 includes a plurality of folding segments 73, each folding segment 73 including a first link 74 and a second link 75 connected together.

[0066] The first link can slide relative to the second link in a first direction, thereby enabling the first and second links to form a telescopic moving component so that each folding segment 73 can be telescopic.

[0067] Alternatively, the first link 74 and the second link 75 can be hinged via a hinge axis, with the axis of the hinge axis pointing in a second direction. Specifically, the first link 74 and the second link 75 can be a horizontal scissor mechanism, allowing each folding segment 73 to extend or retract. For example, the folding segment 73 can be formed by multiple intersecting links (the first link 74 and the second link 75) connected by hinge points, creating an "X" or parallelogram structure, with some designs including guide rails. As another example, both the first link 74 and the second link 75 can be made of fiberglass.

[0068] In some embodiments, the hoisting platform 1 is provided with a track 8 that mates with the wheels of the hoisting vehicle 3. The track 8 extends along a first direction, and the first fixed column 41 and the second fixed column 42 are located on both sides of the track 8 in the first direction. Both the first folding fence 71 and the second folding fence 72 include support rods 76 extending in a vertical direction. Two adjacent folding sections 73 are connected by the support rods 76 in the first direction. Support wheels are provided at the bottom of the support rods 76, and both the support wheels and the wheels of the hoisting vehicle 3 mate on the track 8. This facilitates the movement of the hoisting vehicle 3 and the support rods 76. This avoids excessive downward deflection in the middle sections of the first folding fence 71 and the second folding fence 72 due to long travel distances, which could affect the telescopic function of the first folding fence 71 and the second folding fence 72. Multiple support rods 76 are provided according to the maximum travel distance of the first folding fence 71 and the second folding fence 72, which also serve as guides and limiters during fence telescopic movement. For example, the wheels of the hoisting vehicle 3 are made of lightweight nylon or rubber. This allows the first folding fence 71 and the second folding fence 72 to automatically extend and retract during the movement of the hoisting vehicle 3, forming a traveling safety isolation fence. This improves the safety of personnel working at heights near the edge when carrying out equipment maintenance and moving on the hoisting platform 1, reduces the time and labor costs of installing fixed fences, and lowers the danger of installing fences.

[0069] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0073] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A gantry crane, characterized in that, include: The frame has a hoisting platform at its top, and the hoisting platform has a hoisting hole that extends through it in the vertical direction. The length direction of the hoisting hole is a first direction, and the width direction of the hoisting hole is a second direction. Any two of the first direction, the second direction, and the vertical direction are perpendicular to each other. A lifting vehicle body is slidably mounted on the lifting platform along the first direction, and the lifting device of the lifting vehicle body passes downward through the lifting hole; Two protective sections are provided on the hoisting platform. The two protective sections are located on both sides of the hoisting hole and adjacent to the hoisting hole in the second direction. Each protective section includes a first part and a second part. The first part and the second part are located on both sides of the hoisting vehicle body in the first direction. The ends of the first part and the second part away from the hoisting vehicle body in the first direction are respectively located on both sides of the hoisting hole in the first direction. One end of the first part and one end of the second part are respectively connected to the first end and the second end of the hoisting vehicle body in the first direction. The first part and the second part can move with the hoisting vehicle body in the first direction.

2. The gantry crane according to claim 1, characterized in that, The hoisting platform is provided with two sets of fixing members, which are located on both sides of the hoisting hole in the second direction. Each set of fixing members includes a first fixing post and a second fixing post located on both sides of the hoisting hole in the first direction. Both the first fixing post and the second fixing post extend in the vertical direction. The two protective parts cooperate with the two sets of fixing members respectively. The first part of the protective part cooperates with the first fixing post of the corresponding fixing member, and the second part of the protective part cooperates with the second fixing post of the corresponding fixing member. The first end of the hoisting vehicle body is located between the second end and the first fixing post in the first direction.

3. The gantry crane according to claim 2, characterized in that, Both the first fixed post and the second fixed post are provided with guide wheel sets, and each guide wheel set includes at least two guide wheels that are spaced apart in the vertical direction; Each of the protective parts includes a first rope, and the first part and the second part of the protective part are each composed of two rope segments of the first rope; A portion of the first rope is located below the hoisting vehicle body. Both ends of the first rope pass through the guide wheel assemblies on the first and second fixed columns, respectively, and are connected to the first and second ends of the hoisting vehicle body. The first rope is fitted onto the guide wheel assemblies of the corresponding first and second fixed columns, and the guide wheels of the guide wheel assemblies are used to guide the first rope.

4. The gantry crane according to claim 3, characterized in that, The first rope body is multiple, and one of two adjacent first rope bodies is wrapped around at least a portion of the outside of the other; Both the first fixed post and the second fixed post are provided with a plurality of guide wheel sets, and the plurality of guide wheel sets of each of the first fixed post and the second fixed post respectively cooperate with a plurality of the first rope bodies.

5. The gantry crane according to claim 3, characterized in that, Each of the guide wheel groups includes two guide wheels spaced apart in the vertical direction. The plurality of guide wheel groups on each of the first fixed column and the second fixed column include a first guide wheel group and a second guide wheel group. The two guide wheels of the first guide wheel group are located between the two guide wheels of the second guide wheel group in the vertical direction. The two guide wheels of the first guide wheel group are located between the two guide wheels of the second guide wheel group and the hoisting vehicle body in the first direction. Each of the first end and the second end of the hoisting vehicle body is connected to the end of the first rope by at least one of an elastic element and a tensioner; The seat of the guide wheel is connected to the fixed column via a tensioner.

6. The gantry crane according to claim 2, characterized in that, The first part of each of the protective parts includes a first take-up device and a first tensioning rope. The first take-up device is disposed on the first end of the hoisting vehicle body. The two ends of the first tensioning rope are respectively disposed on the first take-up device and the first fixed post. The first take-up device is used to take up and release and tension the first tensioning rope. The second part of each of the protective sections includes a second take-up device and a second tensioning rope. The second take-up device is located on the second end of the hoisting vehicle body, and the two ends of the second tensioning rope are respectively located on the second take-up device and the second fixing post. The second take-up device is used to take up and release and tension the second tensioning rope.

7. The gantry crane according to claim 6, characterized in that, The first part of each of the protective parts includes a plurality of first take-up devices and a plurality of first tensioning ropes, wherein the plurality of first take-up devices are respectively connected to the plurality of first tensioning ropes, and the plurality of first tensioning ropes of each of the protective parts are spaced apart in the vertical direction; The second part of each of the protective sections includes a plurality of second take-up devices and a plurality of second tensioning ropes, the plurality of second take-up devices being connected to the plurality of second tensioning ropes respectively, and the plurality of second tensioning ropes of each of the protective sections being spaced apart in the vertical direction.

8. The gantry crane according to claim 2, characterized in that, The first part of each of the protective sections is a first folding fence, which can extend and retract in the first direction. The two ends of the first folding fence in the first direction are respectively connected to the first end of the hoisting vehicle body and the first fixed column. The second part of each of the protective sections is a second folding fence, which is retractable in the first direction. The two ends of the second folding fence in the first direction are respectively connected to the second end of the hoisting vehicle body and the second fixed column.

9. The gantry crane according to claim 8, characterized in that, Each of the first folding fence and the second folding fence includes a plurality of folding segments, each of the folding segments including a connected first link and a second link; The first link can slide relative to the second link in the first direction; or, The first link and the second link are hinged together by a hinge shaft, the axis of which is the second direction.

10. The gantry crane according to claim 9, characterized in that, Both the first fixed column and the second fixed column are detachably connected to the hoisting platform; The hoisting platform is provided with a track that mates with the wheels of the hoisting vehicle. The track extends along the first direction, and the first fixed column and the second fixed column are located on both sides of the track in the first direction. Both the first folding fence and the second folding fence include support rods extending in the vertical direction. Two adjacent folding sections in the first direction are connected by the support rods. The bottom of the support rods is provided with support wheels. The support wheels and the wheels of the hoisting vehicle are both fitted on the track.

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