Assembly table and assembly method

Abstract

The present invention provides an assembly table and an assembly method. The assembly table is used to position the bottom cross beam and the bottom side beam to the steel floor from above. The assembly table includes a frame, a steel floor positioning device, a bottom side beam positioning device and a positioning and clamping device. The steel floor positioning device positions the steel floor to a predetermined position of the steel floor, and the bottom side beam positioning device positions the bottom side beam to a predetermined position of the bottom side beam. The positioning and clamping device is movably arranged on the top frame along the height direction of the frame to be used for clamping the steel floor at the predetermined position of the steel floor, and can position the bottom cross beam to a predetermined position of the bottom cross beam above the steel floor. According to the assembly table of the present invention, operators can work on both sides of the assembly table, effectively ensuring the safety of employees' work, and can optimize the process, so that the steel floor, the bottom cross beam and the bottom side beam can all be quickly installed on the assembly table, ensuring product quality, improving production efficiency, and meeting the needs of increasing production capacity.

Description

Technical Field

[0001] The present invention generally relates to the technical field of containers, and more particularly to an assembly station and an assembly method. Background Art

[0002] The existing container chassis with steel floor is assembled in a normal way. Figures 1 to 3 In the assembly platform 10 shown, the bottom cross beam and the bottom side beam are positioned to predetermined positions by the clamping mechanism 2 and the tensioning mechanism 3, respectively, and the bottom cross beam and the bottom side beam are assembled frontally to form the bottom frame of the container. The steel floor is positioned to a predetermined position by the positioning mechanism 4, and the steel floor located at the predetermined position is located above the bottom cross beam and the bottom side beam. After the lifting platform 1 raises the bottom cross beam and the bottom side beam of the assembled container, the operator stands below to decorate the connection position of the bottom cross beam and the steel floor. After the decoration is completed, the bottom cross beam, the bottom side beam and the steel floor are turned over and then welded.

[0003] Due to the poor flatness of the incoming steel floor and the poor straightness of the bottom beam, in order to ensure the verticality and straightness of the assembly of the bottom beam and the steel floor, the installation process of the bottom beam and the steel floor will take a lot of time, and inspection and manual correction are also required after welding.

[0004] In the above-mentioned assembly method, employees work under the lifting platform, which poses a serious safety hazard. In addition, the production capacity of the chassis of the container with a steel floor is low, and the assembly quality cannot be guaranteed.

[0005] Therefore, it is necessary to provide an assembly station and an assembly method to at least partially solve the above problems. Summary of the invention

[0006] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0007] In order to at least partially solve the above problems, according to a first aspect of the present invention, there is provided an assembly platform for positioning a bottom cross beam and a bottom side beam to a steel floor from above, the assembly platform comprising:

[0008] A frame, the frame comprising a frame body and a top frame connected to the frame body, the top frame being located above the frame body;

[0009] A steel floor positioning device, the steel floor positioning device is arranged on the frame to position the steel floor to a predetermined position of the steel floor;

[0010] A bottom side beam positioning device, the bottom side beam positioning devices are respectively arranged on both sides of the frame body along the width direction of the frame, so as to position the bottom side beam to a predetermined position of the bottom side beam; and

[0011] A positioning and clamping device is movably arranged on the top frame along the height direction of the frame to be used for clamping the steel floor at a predetermined position of the steel floor and capable of positioning the bottom cross beam to a predetermined position of the bottom cross beam above the steel floor.

[0012] The assembly table according to the present invention adopts a reverse assembly process, and the bottom cross beam located at a predetermined position of the bottom cross beam is located above the steel floor. Operators can work on both sides of the assembly table. The assembly table does not need to lift the bottom cross beam, the bottom side beam and the steel floor, which effectively ensures the safety of employees' work and can optimize the process. The steel floor, the bottom cross beam and the bottom side beam can all be quickly installed on the assembly table, which can meet the verticality and straightness requirements of the assembly of the bottom cross beam and the steel floor, ensure product quality, improve production efficiency, and meet the needs of increased production capacity.

[0013] Optionally, the positioning and pressing device includes:

[0014] a first driving mechanism, the top of which is connected to the top frame, and the first driving mechanism is configured to be movable along the height direction;

[0015] a first connecting plate, a top of the first connecting plate being connected to a bottom of the first driving mechanism; and

[0016] A plurality of compression beams, the tops of which are connected to the bottom of the first connecting plate and are arranged at intervals along the length direction of the frame, and the bottoms of which are used to compress the steel floor.

[0017] In this way, the steel floor can be flattened to ensure the flatness of the steel floor.

[0018] Optionally, an adsorption member is provided on the side of the pressure beam, the side of the pressure beam is parallel to the width direction, and the adsorption member is used to adsorb the bottom cross beam so that the side of the bottom cross beam is closely fitted with the side of the pressure beam. In this way, the function of straightening the bottom cross beam can be achieved, the slight deformation of the bottom cross beam after processing is eliminated, the straightness of the bottom cross beam itself is ensured, and the bottom cross beam is perpendicular to the bottom side beam.

[0019] Optionally, the frame is further provided with a guide mechanism, and the guide mechanism comprises:

[0020] a first connecting column, the top of which is connected to the top frame;

[0021] a guide sleeve connected to a side portion of the first connecting column; and

[0022] A guide column, wherein the guide column is arranged in the guide sleeve and is movable relative to the guide sleeve along the height direction, and the guide column is connected to the first connecting plate.

[0023] In this way, the straightness of the first connecting plate and the pressure beam is ensured when they move.

[0024] Optionally, the positioning and pressing device includes at least two first connecting plates, the two first connecting plates are arranged opposite to each other along the width direction of the frame, the upper surfaces of the at least two first connecting plates are each provided with a second connecting column extending upward, the side of the second connecting column is connected to the guide column, and the two second connecting columns opposite to each other along the width direction are connected by a synchronization mechanism, and the synchronization mechanism includes:

[0025] a rack connected to the top frame, wherein the length direction of the rack is parallel to the height direction; and

[0026] A gear is meshed with the rack and is movable relative to the rack along the height direction, and the gear is connected to the second connecting column through a connecting beam.

[0027] In this way, it is possible to achieve synchronous lifting and lowering of multiple pressure beams without jamming.

[0028] Optionally, the steel floor positioning device comprises:

[0029] A first positioning mechanism, wherein the first positioning mechanism is arranged at one end of the frame body along the length direction of the frame, and the first positioning mechanism abuts against one end of the steel floor;

[0030] a second positioning mechanism, the second positioning mechanism being respectively arranged at two sides of the frame along the width direction and being movable relative to the frame along the width direction, the second positioning mechanism abutting against one side of the steel floor; and

[0031] A third positioning mechanism is disposed at the other end of the frame along the length direction and is movable relative to the frame along the length direction, and the third positioning mechanism abuts against the other end of the steel floor.

[0032] In this way, the steel floor can be positioned in multiple directions to ensure the accuracy of the steel floor positioning.

[0033] Optionally, a fork groove pressing device is further included, and the fork groove pressing device includes:

[0034] a second driving mechanism, the top of which is connected to the top frame, and the second driving mechanism is configured to be movable along the height direction; and

[0035] A second connecting plate, the top of the second connecting plate is connected to the bottom of the second driving mechanism, and the bottom of the second connecting plate is used for pressing the fork groove.

[0036] Thereby, the flatness of the fork groove can be ensured.

[0037] Optionally, the bottom side beam positioning device comprises:

[0038] A positioning block, wherein the positioning block is disposed on a side of the frame, and a length direction of the positioning block is parallel to a length direction of the frame; and

[0039] An operating mechanism is disposed on the frame and is movable relative to the frame, and the operating mechanism can drive the bottom side beam to move to a position in close contact with the positioning block.

[0040] Thereby, the bottom side beam can be accurately positioned at the bottom side beam predetermined position.

[0041] Optionally, the operating mechanism includes:

[0042] A third driving mechanism, a connection end of which is hinged to the frame; and

[0043] A hinged plate, wherein a first hinged end of the hinged plate is hinged to the frame, a second hinged end of the hinged plate is hinged to the moving end of the third driving mechanism, and a free end of the hinged plate is used to abut against the bottom side beam.

[0044] This makes operation easier.

[0045] The present invention also provides an assembly method for the above-mentioned assembly platform, the assembly method comprising:

[0046] Step 1: The assembly platform positions the steel floor to a predetermined position of the steel floor;

[0047] Step 2: The assembly platform presses the steel floor that is already located at the predetermined position of the steel floor, and the assembly platform positions the bottom side beam on one side to the predetermined position of the first bottom side beam;

[0048] Step 3: The assembly platform positions the bottom cross beam to the predetermined position of the bottom cross beam, the bottom cross beam at the predetermined position of the bottom cross beam is located above the steel floor and one side of the bottom cross beam abuts against the inner side of the bottom side beam at the predetermined position of the first bottom side beam;

[0049] Step 4: The assembly platform positions the bottom side beam on the other side to a predetermined position of the second bottom side beam, and the inner side of the bottom side beam at the predetermined position of the second bottom side beam abuts against the other side of the bottom cross beam.

[0050] According to the assembly method of the present invention, a reverse assembly process is adopted, and the bottom cross beam located at the predetermined position of the bottom cross beam is located above the steel floor. Operators can work on both sides of the assembly table. The assembly table does not need to lift the bottom cross beam, the bottom side beam and the steel floor, which effectively ensures the safety of employees' work and can optimize the process. The steel floor, the bottom cross beam and the bottom side beam can all be quickly installed on the assembly table, which can meet the verticality and straightness requirements of the assembly of the bottom cross beam and the steel floor, ensure product quality, improve production efficiency, and meet the needs of increased production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the device and principle of the present invention. In the drawings,

[0052] Figure 1 It is the main view of the existing assembly table;

[0053] Figure 2 for Figure 1 A top view of the assembly station shown;

[0054] Figure 3 for Figure 1 A left side view of the assembly table is shown;

[0055] Figure 4 A front view of an assembly station according to a preferred embodiment of the present invention;

[0056] Figure 5 for Figure 4 A top view of the assembly station is shown; and

[0057] Figure 6 for Figure 4 Left side view of the assembly table shown.

[0058] Description of reference numerals:

[0059] 1: Lifting platform 2: Clamping mechanism

[0060] 3: Tensioning mechanism 4: Positioning mechanism

[0061] 10: Assembly table 100: Assembly table

[0062] 110: rack 111: top rack

[0063] 112: frame 121: first positioning mechanism

[0064] 122: Second positioning mechanism 123: Third positioning mechanism

[0065] 130: Positioning and pressing device 131: First connecting plate

[0066] 132: First driving mechanism 133: Pressure beam

[0067] 134: Adsorption member 135: Guide sleeve

[0068] 136: Guide column 137: First connecting column

[0069] 138: Second connecting column 140: Synchronous mechanism

[0070] 141: rack 142: gear

[0071] 143: connecting beam 144: second driving mechanism

[0072] 145: Second connecting plate 151: Operating mechanism

[0073] 152: Positioning block 153: Third driving mechanism

[0074] 154: hinge plate 155: connection end

[0075] 156: First hinge end 201: Bottom side beam

[0076] 202: Bottom beam 203: Fork groove DETAILED DESCRIPTION

[0077] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0078] In order to fully understand the present invention, a detailed structure will be presented in the following description to illustrate the present invention. Obviously, the implementation of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments and should not be construed as being limited to the embodiments presented here.

[0079] It should be understood that the purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present invention. The singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. When the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof. The terms "upper", "lower", "front", "back", "left", "right" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

[0080] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifications and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0081] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. These drawings show representative embodiments of the present invention and do not limit the present invention.

[0082] The bottom of the container may include a bottom cross beam, a bottom side beam and a steel floor, and the bottom cross beam and the bottom side beam may be vertically connected. The present invention provides an assembly station 100 of a preferred embodiment for positioning the bottom cross beam and the bottom side beam to the steel floor from above.

[0083] Figures 4 to 6 The specific structure of the assembly station 100 according to a preferred embodiment is shown.

[0084] The assembly station 100 may include a frame 110, which is configured as a general frame structure. The frame 110 may include a frame body 112, the size of which may be larger than the size of the bottom side beam 201, the bottom cross beam 202, and the steel floor, so that the bottom side beam 201, the bottom cross beam 202, and the steel floor can be placed on the frame body 112 without falling. The length direction of the frame body 112 is parallel to the length direction of the frame 110, the width direction of the frame body 112 is parallel to the width direction of the frame 110, and the height direction of the frame body 112 is parallel to the height direction of the frame 110.

[0085] The rack 110 may further include a top frame 111 and a column. The top frame 111 is located above the frame body 112. The length direction of the top frame 111 may be parallel to the length direction of the frame body 112, and the width direction of the top frame 111 is parallel to the width direction of the frame body 112. The length direction of the column is parallel to the height direction of the rack 110. The top of the column is connected to the top frame 111, and the bottom of the column is connected to the frame body 112.

[0086] The steel floor conveying device can convey the steel floor to the frame 112 along the length direction of the frame 110. The frame 112 can be constructed as a hollow structure, and the frame 112 can be provided with a supporting device for supporting the steel floor. For example, the supporting device can include a plurality of rollers, and the plurality of rollers can roll and support the steel floor to assist the steel floor to move along the length direction of the frame 110.

[0087] The frame 112 may be provided with a steel floor positioning device, which can position the steel floor to a predetermined position of the steel floor. Specifically, the steel floor positioning device may include a first positioning mechanism 121, a second positioning mechanism 122, and a third positioning mechanism 123, which may be constructed as pneumatic positioning mechanisms, thereby completing rapid positioning of the steel floor.

[0088] like Figure 4 As shown, the first positioning mechanism 121 is arranged at one end of the frame body 112 along the length direction of the frame 110. Preferably, the steel floor conveying path can be parallel to the length direction of the frame 110. In this way, the steel floor conveying device moves the steel floor along the steel floor conveying path, the first positioning mechanism 121 is arranged at the end of the steel floor conveying path, and the steel floor moves along the length direction of the frame 110 until it abuts against the first positioning mechanism 121.

[0089] The first positioning mechanism 121 may include a cylinder and a piston rod, and the cylinder may be connected to the frame 112 to drive the piston rod to move along the length direction of the frame 110. The piston rod may extend upward to abut against one end of the steel floor to achieve end positioning of the steel floor.

[0090] Preferably, one end of the steel floor can be abutted against the piston rod of the first positioning mechanism 121. In order to prevent the steel floor from deflecting, two first positioning mechanisms 121 can be provided on the frame 112, and the two first positioning mechanisms 121 can be spaced apart along the width direction of the frame 112. Both first positioning mechanisms 121 abut against one end of the steel floor to achieve two-point positioning of the steel floor.

[0091] like Figure 5As shown, the frame 110 is also provided with a second positioning mechanism 122, which is respectively arranged on both sides of the frame body 112 along the width direction of the frame 110. Preferably, the second positioning mechanism 122 can be configured as a cylinder, and the second positioning mechanism 122 can be movable relative to the frame body 112 along the width direction of the frame 110. The second positioning mechanism 122 can abut against one side of the steel floor, and the second positioning mechanism 122 can drive the steel floor to move along the width direction of the frame 110. Preferably, the cylinders located on the opposite sides of the frame body 112 can respectively push the steel floor to move toward the direction of the central axis of the frame 110, so as to achieve the center positioning of the steel floor in the width direction.

[0092] The second positioning mechanisms 122 may be provided at opposite ends of the same side of the frame 112 along the length direction of the frame 110, that is, four second positioning mechanisms 122 may be provided on the frame 112, and the four second positioning mechanisms 122 are respectively close to the four corners of the frame 112. The two second positioning mechanisms 122 located on the same side can both apply force to the same side of the steel floor, thereby preventing the steel floor from being offset when moving. The four corners of the steel floor can each be subjected to the force applied by the four second positioning mechanisms 122, so that the steel floor can be centrally positioned, and the steel floor can stably move along the width direction of the frame 110.

[0093] The frame 112 is also provided with a third positioning mechanism 123, which is arranged at the other end of the frame 112 along the length direction of the frame 110. The first positioning mechanism 121 and the third positioning mechanism 123 can be arranged at opposite ends of the frame 112 along the length direction of the frame 110. The third positioning mechanism 123 can be movable relative to the frame 112 along the length direction of the frame 110, and the third positioning mechanism 123 can abut against the other end of the steel floor. The third positioning mechanism 123 can move along the length direction of the frame 110 toward the first positioning mechanism 121 until the third positioning mechanism 123 abuts against the other end of the steel floor.

[0094] A third positioning mechanism 123 may be provided on the frame 112. The third positioning mechanism 123 may include a cylinder and a hook. The cylinder may drive the hook to move along the length direction of the frame 110. After the piston rod of the cylinder of the first positioning mechanism 121 is retracted, the hook of the third positioning mechanism 123 may pull the other end of the steel floor to achieve compression positioning in the length direction of the steel floor.

[0095] Therefore, in the above-mentioned steel floor positioning process, the steel floor conveying device first conveys the steel floor along the length direction of the frame 110 toward the direction of the first positioning mechanism 121, and one end of the steel floor abuts against the first positioning mechanism 121; after one end of the steel floor abuts against the first positioning mechanism 121, the second positioning mechanism 122 abuts against one side of the steel floor, and the second positioning mechanism 122 drives the steel floor to move in the direction of the central axis of the frame 110; after the steel floor is centered, the third positioning mechanism 123 moves along the length direction of the frame 110 toward the direction of the first positioning mechanism 121 until the third positioning mechanism 123 abuts against the other end of the steel floor, thereby presetting the steel floor to the predetermined position of the steel floor, and finally realizing the positioning of the steel floor.

[0096] The steel floor positioning device can also include a double switch, an interconnection switch, and a power-off protection device to ensure the safety of the operators. In this way, both operators need to confirm that the button is pressed before it can be operated, preventing safety hazards caused by blind areas in the operation. The steel floor positioning device can also be equipped with a three-position solenoid valve. When a sudden power outage occurs, the steel floor positioning device is kept in the current state and does not operate to prevent accidents.

[0097] The assembly table 100 further includes a positioning and pressing device 130, which is movably arranged on the top frame 111 along the height direction of the frame 110. After the steel floor is positioned to the predetermined position of the steel floor, the positioning and pressing device 130 moves along the height direction of the frame 110 to press the steel floor at the predetermined position of the steel floor, thereby flattening the steel floor.

[0098] The specific structure of the positioning and pressing device 130 is now described.

[0099] The positioning and pressing device 130 includes a first driving mechanism 132, a first connecting plate 131, and a plurality of pressing beams 133. The top of the first driving mechanism 132 is connected to the top frame 111, and the first driving mechanism 132 is movable in the height direction of the frame 110. The first driving mechanism 132 can be configured as a cylinder so as to be able to stably move in the height direction of the frame 110. The positioning and pressing device 130 can include a plurality of first driving mechanisms 132, and the plurality of first driving mechanisms 132 can be arranged on the top frame 111 at intervals along the length direction of the frame 110. Two first driving mechanisms 132 can also be arranged oppositely in the width direction of the frame 110.

[0100] The top of the first connecting plate 131 is connected to the bottom of the first driving mechanism 132. For example, the fixed end of the cylinder is connected to the top frame 111, and the movable end of the cylinder is connected to the first connecting plate 131. Multiple first driving mechanisms 132 located on the same side can be connected to the same first connecting plate 131, so that the multiple first driving mechanisms 132 can jointly drive the same first connecting plate 131 to move along the height direction of the frame 110, ensuring the synchronization of the movement of the multiple first driving mechanisms 132.

[0101] The positioning and pressing device 130 may include a plurality of first connecting plates 131, and the plurality of first connecting plates 131 may be arranged at intervals along the length direction of the frame 110. Two first connecting plates 131 may be arranged opposite to each other along the width direction of the frame 110.

[0102] A plurality of compression beams 133 are located above the steel floor along the height direction of the rack 110. The tops of the plurality of compression beams 133 are connected to the bottom of the first connecting plate 131, and the plurality of compression beams 133 may be arranged at intervals along the length direction of the rack 110. The length direction of the compression beams 133 may be parallel to the width direction of the rack 110.

[0103] The opposite sides of the compression beam 133 along the width direction of the frame 110 can be connected to the two first connecting plates 131 respectively, so as to ensure the synchronization of the two connecting plates moving along the height direction of the frame 110. Multiple compression beams 133 can form an integral structure, improve strength, and ensure the synchronization of the multiple compression beams 133 moving along the height direction of the frame 110.

[0104] After the steel floor is positioned to the predetermined position of the steel floor, the first driving mechanism 132 drives the first connecting plate 131 to drive the pressure beam 133 to move downward along the height direction of the frame 110, and the bottom of the pressure beam 133 is against the upper surface of the steel floor to press the steel floor, thereby ensuring the surface flatness of the steel floor.

[0105] In order to ensure the straightness of the first connecting plate 131 and the pressure beam 133 when moving, a guide mechanism is also provided on the frame 110, and the guide mechanism guides the movement of the first connecting plate 131. The guide mechanism includes a guide sleeve 135, a guide column 136 and a first connecting column 137, and the top of the first connecting column 137 is connected to the top frame 111. The length direction of the first connecting column 137 is parallel to the height direction of the frame 110. The first connecting column 137 can extend downward from the lower surface of the top frame 111. The side of the first connecting column 137 can be provided with a connecting ring, and the connecting ring can clamp the guide sleeve 135.

[0106] The cross section of the guide sleeve 135 may be substantially annular. The guide post 136 is movably disposed in the guide sleeve 135, and the guide post 136 is connected to the first connecting plate 131. When the first driving mechanism 132 drives the first connecting plate 131 to move along the height direction of the frame 110, the first connecting plate 131 may drive the guide post 136 to move relative to the guide sleeve 135 along the height direction of the frame 110.

[0107] The guiding mechanism can be arranged on the side of the first driving mechanism 132, the length directions of the first connecting column 137 and the guide column 136 are parallel to the length direction of the first driving mechanism 132, and the moving direction of the guide column 136 is the same as the moving direction of the first connecting plate 131, so that the guiding mechanism can guide the movement of the first connecting plate 131.

[0108] Optionally, a plurality of connection rings may be provided on the first connection column 137, and the connection rings may be arranged on the first connection column 137 at intervals along the height direction of the rack 110. In this way, multi-point positioning of the guide column 136 along the height direction of the rack 110 may be achieved, thereby preventing the guide column 136 from deflecting during movement.

[0109] Optionally, a plurality of guide mechanisms are provided on the frame 110, and two guide mechanisms are respectively provided on opposite sides of the two first driving mechanisms 132 along the length direction of the frame 110. In this way, two-point positioning of the first connecting plate 131 along the length direction of the frame 110 can be achieved, ensuring that the upper and lower dimensions of the positioning reference are not offset, preventing the first connecting plate 131 from tilting when moving along the height direction of the frame 110, thereby avoiding the first connecting plate 131 from generating an angle with the horizontal direction.

[0110] Further, the positioning and pressing device 130 may include at least two first connecting plates 131, and the two first connecting plates 131 are arranged opposite to each other along the width direction of the frame 110. In order to ensure the synchronization of the two first connecting plates 131 when moving, the upper surface of each first connecting plate 131 is provided with a second connecting column 138 extending upward. The side of the second connecting column 138 is connected to the guide column 136. Specifically, the side of the second connecting column 138 can be connected to the guide column 136 through at least two connecting members. The top and bottom of the second connecting column 138 along the height direction of the frame 110 can be provided with connecting members, and the two connecting members are respectively connected to the top and bottom of the guide column 136. The guide mechanism may include a plurality of guide sleeves 135, and the plurality of guide sleeves 135 can be located between the two connecting members along the height direction of the frame 110, so that the connecting member plays a limiting role in the movement of the guide column 136.

[0111] The first connecting plate 131 can drive the second connecting column 138 to move along the height direction of the frame 110, thereby driving the guide column 136 to move along the height direction of the frame 110. The two second connecting columns 138 can be arranged opposite to each other along the width direction of the frame 110. In order to ensure the synchronization of the two second connecting columns 138 when they move, the two second connecting columns 138 arranged opposite to each other along the width direction of the frame 110 are connected by a synchronization mechanism 140.

[0112] Figure 6 The specific structure of the synchronization mechanism 140 is shown.

[0113] The synchronization mechanism 140 may include a rack 141, a gear 142 and a connecting beam 143. The rack 141 may be connected to the top frame, and the length direction of the rack 141 may be parallel to the height direction of the frame 110. The gear 142 may be meshed with the rack 141 and the gear 142 may be movable relative to the rack 141 along the height direction of the frame 110. The synchronization mechanism 140 may include at least two racks 141, and the two racks 141 may be arranged opposite to each other along the width direction of the frame 110. The lengths of the two racks 141 are substantially the same. A meshing gear 142 may be provided on each rack 141. In order to ensure the synchronization of the movement of the two gears 142, the axial directions of the two gears 142 may be parallel to the width direction of the frame 110, and the axes of the two gears 142 may be connected together by a crossbeam, and the two gears 142 may be rotatably connected to the crossbeam. The length direction of the crossbeam may be parallel to the width direction of the frame 110 , and the crossbeam may be connected to the connecting beam 143 via a connecting piece, and the length direction of the crossbeam is parallel to the length direction of the connecting beam 143 .

[0114] Both sides of the connecting beam 143 along the width direction of the frame 110 can be connected to the second connecting columns 138 on both sides. In this way, the synchronization of the two second connecting columns 138 when moving along the height direction of the frame 110 can be ensured. Optionally, the second connecting columns 138 can be provided at both ends of the first connecting plate 131 along the length direction of the frame 110. In this way, a total of four second connecting columns 138 are provided on the two first connecting plates 131, thereby achieving the synchronization and stability of the movement of the two first connecting plates 131 along the height direction of the frame 110, and achieving the synchronous lifting and lowering of multiple pressure beams 133 without stagnation, thereby ensuring that the two first connecting plates 131 do not deviate when moving. Since the different time and size of the force output by the multiple first driving mechanisms 132 will cause the two first connecting plates 131 to tilt, the above-mentioned synchronization mechanism can be used to avoid the situation where the two first connecting plates 131 are tilted, thereby ensuring the synchronization and horizontal straightness of the movement of multiple pressure beams 133.

[0115] Further, after the steel floor is flattened, Figure 4As shown, the assembly platform also includes a fork groove conveying device, which can also convey the fork groove 203 to the top of the steel floor. The assembly platform 100 also includes a fork groove positioning device, which can be arranged on the frame 112 to position the fork groove 203 to a predetermined position of the fork groove.

[0116] The assembly station 100 further includes a fork groove pressing device, which is located above the fork groove 203 and is used to press the fork groove 203 that is located at a predetermined position of the fork groove.

[0117] Specifically, the fork groove pressing device may include a second driving mechanism 144 and a second connecting plate 145, the top of the second driving mechanism 144 is connected to the top frame 111, and the second driving mechanism 144 may be configured to be movable in the height direction of the frame 110. The top of the second connecting plate 145 is connected to the bottom of the second driving mechanism 144, and the second driving mechanism 144 can drive the second connecting plate 145 to be movable in the height direction of the frame 110.

[0118] For example, the second driving mechanism 144 can be constructed as a cylinder to ensure stable power output. The fixed end of the cylinder is connected to the top frame 111, and the movable end of the cylinder is connected to the second connecting plate 145. The movable end of the cylinder can drive the second connecting plate 145 to move downward along the height direction of the frame 110, and the bottom of the second connecting plate 145 abuts against the upper surface of the fork groove 203 to press the fork groove 203, thereby ensuring the accuracy of the positioning of the fork groove 203.

[0119] The fork groove clamping device can also include a double switch, an interconnection switch and a power-off protection device to ensure the safety of the operators. In this way, both operators need to confirm that the button is pressed before it can be operated, preventing safety hazards caused by blind areas of the operation. The fork groove clamping device can also be installed with a three-position solenoid valve. When a sudden power outage occurs, the fork groove clamping device is kept in the current state and does not operate to prevent accidents.

[0120] The bottom beam conveying device can convey the bottom beam 201 to the frame 112. Figure 6 As shown, the assembly platform 100 includes a bottom side beam positioning device for positioning the bottom side beam 201 to a predetermined position of the bottom side beam. Specifically, the bottom side beams 201 on both sides can be transported to the frame 112 by two bottom side beam transporting devices. The bottom side beam positioning devices are respectively arranged on both sides of the frame 112 along the width direction of the frame 110 to respectively position the bottom side beams 201 on both sides.

[0121] The bottom side beam positioning device includes a positioning block 152 and an operating mechanism 151. The positioning block 152 can be arranged on the side of the frame body 112 along the width direction of the frame 110. The length direction of the positioning block 152 is parallel to the length direction of the frame 110. The shape of the positioning block 152 can match the shape of the bottom side beam 201, that is, the shape of the bent outer surface of the positioning block 152 can match the shape of the bottom side beam 201, and the bent outer surfaces of the two oppositely arranged positioning blocks 152 face in opposite directions.

[0122] The operating mechanism 151 is disposed on the frame 112 and is movable relative to the frame 112 to drive the bottom side beam 201 to move to a position close to the positioning block 152 , thereby positioning the bottom side beam 201 to a predetermined bottom side beam position.

[0123] The operating mechanism 151 may include a third driving mechanism 153 and a hinge plate 154. The third driving mechanism 153 includes a connecting end 155 and a moving end. The connecting end 155 of the third driving mechanism 153 may be hinged to the frame 110, and the moving end of the third driving mechanism 153 may be hinged to the hinge plate 154. The third driving mechanism 153 may be constructed as a cylinder to achieve stable output of power.

[0124] The hinge plate 154 may be constructed as a substantially triangular plate, and the hinge plate 154 may include a first hinge end 156, a second hinge end, and a free end, and the first hinge end 156 of the hinge plate 154 may be hinged to the frame 110. The first hinge end 156 of the hinge plate 154 may be hinged to the frame body 112, and the connecting end 155 of the third driving mechanism 153 is located below the first hinge end 156 along the height direction of the frame 110, thereby leaving a movable distance for the moving end of the third driving mechanism 153.

[0125] The second hinged end of the hinged plate 154 can be hinged to the moving end of the third driving mechanism 153, so that the third driving mechanism 153 can drive the hinged plate 154 to rotate and move. The free end of the hinged plate 154 can abut against the bottom side beam 201, thereby driving the bottom side beam 201 to move to a position close to the positioning block 152. Optionally, the free end of the hinged plate 154 can be provided with a pressure head, the shape of the pressure head can match the shape of the bottom side beam 201, the hinged plate 154 can drive the pressure head to move, and the pressure head can abut against the bottom side beam 201, thereby ensuring that the bottom side beam 201 is closely fitted with the positioning block 152. The third driving mechanism 153 drives the hinged plate 154 to rotate, so as to press the bottom side beam 201 onto the positioning block 152, realize the positioning of the bottom side beam 201 in the width direction, ensure that the bottom side beam 201 is firmly positioned in both directions, and ensure the accuracy of the positioning of the bottom side beam 201.

[0126] Optionally, six operating mechanisms 151 may be provided on each side of the frame 112 to ensure that the bottom side beam 201 is in close contact with the positioning block 152 along the length direction of the frame 110, thereby ensuring the accuracy of the positioning of the bottom side beam 201. The operator may pre-adjust and level the positioning block 152, with the outer surface of the positioning block 152 facing the outside of the frame 110. The cylinder drives the hinge plate 154 to rotate, and the pressure head at the free end of the hinge plate 154 presses the bottom side beam 201, so that the bottom side beam 201 is in close contact with the outer surface and upper surface of the positioning block 152, thereby ensuring the straightness requirement of the bottom side beam 201.

[0127] The bottom beam positioning device can also include a double switch, an interconnection switch, and a power-off protection device to ensure the safety of the operators. In this way, both operators need to confirm that the button has been pressed before it can be operated, preventing safety hazards caused by blind areas of the operation. The bottom beam positioning device can also be equipped with a three-position solenoid valve. In the event of a sudden power outage, the bottom beam positioning device is kept in its current state and does not operate to prevent accidents.

[0128] The bottom cross beam conveying device can convey the bottom cross beam 202 to the top of the steel floor, and the positioning and pressing device 130 can also position the bottom cross beam 202 to the predetermined position of the bottom cross beam. Specifically, the side of the pressing beam 133 is parallel to the width direction of the frame 110, and the side of the pressing beam 133 is provided with an adsorption member 134. For example, the adsorption member 134 can be configured as an electromagnet. The adsorption member 134 is used to adsorb the bottom cross beam 202, so that the side of the bottom cross beam 202 is closely fitted with the side of the pressing beam 133, and rapid positioning is achieved.

[0129] The positioning and clamping device 130 can realize the straightening function of the bottom cross beam 202, eliminate the slight deformation of the bottom cross beam 202 after processing, ensure the straightness of the bottom cross beam 202 itself, and thus ensure that the bottom cross beam 202 is perpendicular to the bottom side beam 201. The spacing between adjacent pressure beams 133 can match the spacing between adjacent bottom cross beams 202. Optionally, the spacing between adjacent pressure beams 133 can be adjusted to adapt to bottom cross beams 202 with different spacings, and realize the spacing positioning and side bending straightening of the bottom cross beam 202.

[0130] Specifically, the electromagnet (as an embodiment of the adsorption member 134) can be installed on the side of the pressure beam 133, and each pressure beam 133 can be provided with a plurality of electromagnets, and the plurality of electromagnets are arranged on the pressure beam 133 at intervals along the width direction of the frame 110, and the plurality of electromagnets can adsorb the same bottom cross beam 202. The surfaces of the plurality of electromagnets are pre-adjusted to be coplanar, and the bottom cross beam 202 is first placed on the side of the pressure beam 133 opposite to the electromagnet, and the electromagnet switch is turned on to adsorb the bottom cross beam 202 onto the electromagnet, so as to realize the side bending straightening of the bottom cross beam 202 and the spacing positioning of the bottom cross beam 202.

[0131] The positioning and clamping device 130 may also include a double switch, an interconnection switch, and a power-off protection device to ensure the safety of the operators. In this way, both operators need to confirm that the button is pressed before it can be operated, preventing safety hazards caused by blind areas of operation. The positioning and clamping device 130 may also be equipped with a three-position solenoid valve. When a sudden power outage occurs, the positioning and clamping device 130 is kept in the current state and does not operate to prevent accidents.

[0132] According to the assembly table 100 of the present invention, the assembly table 100 includes a frame 110, a steel floor positioning device, a bottom side beam positioning device and a positioning and clamping device 130. The steel floor positioning device can position the steel floor to a predetermined position of the steel floor, the bottom side beam positioning device can position the bottom side beam 201 to a predetermined position of the bottom side beam, the positioning and clamping device 130 can clamp the steel floor located at the predetermined position of the steel floor and position the bottom cross beam 202 to the predetermined position of the bottom cross beam. A reverse assembly process is adopted, that is, the bottom cross beam 202 located at the predetermined position of the bottom cross beam is located above the steel floor. In this way, operators can work on both sides of the assembly table 100, and the assembly table 100 does not need to lift the bottom cross beam 202, the bottom side beam 201 and the steel floor, which effectively ensures the safety of employees' work and can optimize the process. The steel floor, the bottom cross beam 202, the bottom side beam 201 and the fork groove 203 can all be quickly installed on the assembly table 100, which can meet the verticality and straightness requirements of the assembly of the bottom cross beam 202 and the steel floor, ensure product quality, improve production efficiency, and meet the needs of increasing production capacity.

[0133] The present invention also provides an assembly method for the above-mentioned assembly platform, and the assembly method comprises the following steps:

[0134] Step S101: The assembly platform positions the steel floor to a predetermined position of the steel floor.

[0135] The assembly table includes a steel floor positioning device, which includes a first positioning mechanism, a second positioning mechanism and a third positioning mechanism. The first positioning mechanism is arranged at one end of the frame along the length direction of the frame, the second positioning mechanism is arranged on both sides of the frame along the width direction, and the third positioning mechanism is arranged at the other end of the frame along the length direction of the frame.

[0136] The steel floor conveying device conveys the steel floor to the frame. One end of the steel floor first abuts against the first positioning mechanism. After the one end of the steel floor abuts against the first positioning mechanism, the steel floor conveying device stops running.

[0137] The second positioning mechanism can abut against one side of the steel floor, and the second positioning mechanism can move the steel floor along the width direction of the rack to achieve center positioning of the steel floor.

[0138] The third positioning mechanism moves along the length direction of the frame to abut against the other end of the steel floor, and finally positions the steel floor to a predetermined position of the steel floor.

[0139] Step S102: The assembly platform presses the steel floor that is already located at a predetermined position of the steel floor.

[0140] The assembly table includes a positioning and pressing device, which is arranged above the steel floor along the height direction of the frame. The positioning and pressing device includes a first driving mechanism, a first connecting plate and a plurality of pressing beams, the first driving mechanism is connected to the top frame, the first connecting plate is used to connect the first driving mechanism and the plurality of pressing beams, and the first driving mechanism can drive the plurality of pressing beams to move along the height direction of the frame. The plurality of pressing beams can move downward along the height direction of the frame to press the steel floor.

[0141] Step S103: The assembly platform positions the bottom side beam on one side to a predetermined position of the first bottom side beam.

[0142] The bottom side beam conveying device first conveys the bottom side beam on one side to the frame. The assembly platform includes a bottom side beam positioning device, which is respectively arranged on both sides of the frame along the width direction of the frame. The bottom side beam positioning device located on one side can position the bottom side beam on one side to the first bottom side beam predetermined position.

[0143] The bottom side beam positioning device includes a positioning block and an operating mechanism, wherein the positioning block can be arranged on the side of the frame, the operating mechanism is arranged on the frame and is movable relative to the frame, and the operating mechanism can move relative to the frame along the width direction of the frame, thereby pushing the bottom side beam on one side to move to a position close to the positioning block. In this way, the bottom side beam on one side can be positioned to the predetermined position of the first bottom side beam.

[0144] Step S104: the assembly platform positions the bottom cross beam to a predetermined position of the bottom cross beam.

[0145] The bottom cross beam conveying device conveys the bottom cross beam to the top of the steel floor. The sides of the multiple pressure beams of the positioning and clamping mechanism are provided with adsorption mechanisms, and the number of pressure beams corresponds to the number of bottom cross beams. The first driving mechanism can drive the multiple pressure beams to move downward along the height direction of the frame, and each pressure beam can adsorb a bottom cross beam so that the bottom cross beam and the side of the pressure beam are tightly attached, thereby positioning the bottom cross beam to the predetermined position of the bottom cross beam, and the bottom cross beam located at the predetermined position of the bottom cross beam is located above the steel floor. One side of the bottom cross beam located at the predetermined position of the bottom cross beam abuts against the inner side of the bottom side beam located at the predetermined position of the first bottom side beam, so as to ensure that the subsequent bottom cross beam and the bottom side beam on one side can be welded together.

[0146] Step S105: The assembly platform positions the bottom side beam on the other side to a second bottom side beam predetermined position.

[0147] After one side of the bottom cross beam abuts against the inner side of the bottom side beam located at the predetermined position of the first bottom side beam, the bottom side beam conveying device can position the bottom side beam on the other side to the predetermined position of the second bottom side beam.

[0148] The other side of the frame is also provided with a bottom side beam positioning device, which also includes a positioning block and an operating mechanism, so that the operating mechanism on the other side can move relative to the frame along the width direction of the frame, thereby pushing the bottom side beam on the other side to move to a position close to the positioning block on the other side. In this way, the bottom side beam on the other side can be positioned to the second bottom side beam predetermined position.

[0149] The inner side of the bottom side beam at the predetermined position of the second bottom side beam abuts against the other end of the bottom cross beam along the width direction of the frame to ensure that the subsequent bottom cross beam can be welded together with the bottom side beam on the other side.

[0150] Step S106: The assembly station positions and presses the fork groove to a predetermined position of the fork groove.

[0151] The fork groove conveying device can convey the fork groove to the top of the steel floor. The assembly platform includes a fork groove positioning mechanism to position the fork groove to a predetermined position of the fork groove. The assembly platform also includes a fork groove pressing device, which can press the fork groove located at the predetermined position of the fork groove.

[0152] The fork groove pressing device includes a second driving mechanism and a second connecting plate, the second driving mechanism is connected to the frame, and the second driving mechanism can drive the second connecting plate to move downward along the height direction of the frame to press the fork groove located at a predetermined position of the fork groove.

[0153] The bottom side beams on both sides can be welded together with multiple bottom cross beams, and multiple bottom cross beams can be welded together with the steel floor, and the fork slot can be assembled with the steel floor. The operator issues a command to unlock the steel floor positioning device, the bottom side beam positioning device, the positioning and clamping device, and the fork slot clamping device in sequence, and the assembled bottom cross beams, bottom side beams, steel floor and fork slot are then transported to the next station through the conveying device.

[0154] According to the assembly method of the present invention, the steel floor positioning device can position the steel floor to the predetermined position of the steel floor, the positioning and pressing device can press the steel floor located at the predetermined position of the steel floor, the bottom side beam positioning device on one side can position the bottom side beam on one side to the predetermined position of the first bottom side beam, the positioning and pressing device can position the bottom cross beam to the predetermined position of the bottom cross beam, the bottom cross beam located at the predetermined position of the bottom cross beam is located above the steel floor, one side of the bottom side beam is abutted against the inner side of the bottom side beam located at the predetermined position of the first bottom side beam, the bottom side beam positioning device on the other side can position the bottom side beam on the other side to the predetermined position of the second bottom side beam, the inner side located at the predetermined position of the second bottom side beam is abutted against the other side of the bottom cross beam.

[0155] According to the assembly method of the present invention, a reverse assembly process is adopted, that is, the bottom cross beam located at the predetermined position of the bottom cross beam is located above the steel floor. In this way, the operator can work on both sides of the assembly table, and the assembly table does not need to lift the bottom cross beam, the bottom side beam and the steel floor, which effectively ensures the safety of the employees' work, and can optimize the process, and quickly complete the installation of the steel floor, the bottom cross beam, the bottom side beam and the fork groove on the assembly table, which can meet the verticality and straightness requirements of the bottom cross beam and the steel floor assembly, ensure product quality, improve production efficiency, and meet the needs of capacity improvement.

[0156] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "parts" and "pieces" appearing in this article may represent either a single part or a combination of multiple parts. Terms such as "installation" and "setting" appearing in this article may represent either a component being directly attached to another component or a component being attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0157] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention. The protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An assembly table for positioning a bottom cross beam and a bottom side beam to a steel floor from above, characterized in that: The assembly station comprises: A frame, the frame comprising a frame body and a top frame connected to the frame body, the top frame being located above the frame body; A steel floor positioning device, the steel floor positioning device is arranged on the frame to position the steel floor to a predetermined position of the steel floor; A bottom side beam positioning device, the bottom side beam positioning devices are respectively arranged on both sides of the frame body along the width direction of the frame, so as to position the bottom side beam to a predetermined position of the bottom side beam; and A positioning and pressing device, wherein the positioning and pressing device is movably arranged on the top frame along the height direction of the frame, so as to press the steel floor at a predetermined position of the steel floor, and can position the bottom cross beam to a predetermined position of the bottom cross beam above the steel floor so as to weld the bottom cross beam and the steel floor together, wherein the positioning and pressing device comprises a pressing beam, the bottom of the pressing beam is used to press the steel floor, an adsorption member is arranged on the side of the pressing beam, the side of the pressing beam is parallel to the width direction, and the adsorption member is used to adsorb the bottom cross beam so that the side of the bottom cross beam is tightly fitted with the side of the pressing beam, Wherein, the positioning and pressing device comprises: a first driving mechanism, the top of which is connected to the top frame, and the first driving mechanism is configured to be movable along the height direction; a first connecting plate, a top of the first connecting plate being connected to a bottom of the first driving mechanism; and a plurality of compression beams, the tops of the plurality of compression beams are connected to the bottom of the first connecting plate and are arranged at intervals along the length direction of the frame, Wherein, the frame is also provided with a guide mechanism, and the guide mechanism comprises: a first connecting column, the top of which is connected to the top frame; at least two guide sleeves connected to the side of the first connecting column; and a guide post, the guide post being arranged in the guide sleeve and being movable relative to the guide sleeve along the height direction, the guide post being connected to the first connecting plate, The positioning and clamping device includes at least two first connecting plates, which are arranged opposite to each other along the width direction of the frame, and the upper surfaces of the at least two first connecting plates are each provided with a second connecting column extending upward, and the side of the second connecting column is connected to the guide column through two connecting pieces arranged at intervals along the height direction of the frame, and the at least two guide sleeves are located between the two connecting pieces along the height direction, and the two second connecting columns opposite to each other along the width direction are connected by a synchronization mechanism.

2. The assembly station according to claim 1, characterized in that: The synchronization mechanism comprises: a rack connected to the top frame, wherein the length direction of the rack is parallel to the height direction; and A gear is meshed with the rack and is movable relative to the rack along the height direction, and the gear is connected to the second connecting column through a connecting beam.

3. The assembly station according to claim 1, characterized in that: The steel floor positioning device comprises: A first positioning mechanism, wherein the first positioning mechanism is arranged at one end of the frame body along the length direction of the frame, and the first positioning mechanism abuts against one end of the steel floor; a second positioning mechanism, the second positioning mechanism being respectively arranged at two sides of the frame along the width direction and being movable relative to the frame along the width direction, the second positioning mechanism abutting against one side of the steel floor; and A third positioning mechanism is disposed at the other end of the frame along the length direction and is movable relative to the frame along the length direction, and the third positioning mechanism abuts against the other end of the steel floor.

4. The assembly station according to claim 1, characterized in that: It also includes a fork groove clamping device, the fork groove clamping device includes: a second driving mechanism, the top of which is connected to the top frame, and the second driving mechanism is configured to be movable along the height direction; and A second connecting plate, the top of the second connecting plate is connected to the bottom of the second driving mechanism, and the bottom of the second connecting plate is used for pressing the fork groove.

5. The assembly station according to claim 1, characterized in that: The bottom side beam positioning device comprises: A positioning block, wherein the positioning block is disposed on a side of the frame, and a length direction of the positioning block is parallel to a length direction of the frame; and An operating mechanism is disposed on the frame and is movable relative to the frame, and the operating mechanism can drive the bottom side beam to move to a position in close contact with the positioning block.

6. The assembly station according to claim 5, characterized in that: The operating mechanism comprises: A third driving mechanism, a connection end of which is hinged to the frame; and A hinged plate, wherein a first hinged end of the hinged plate is hinged to the frame, a second hinged end of the hinged plate is hinged to the moving end of the third driving mechanism, and a free end of the hinged plate is used to abut against the bottom side beam.

7. An assembly method for the assembly table according to any one of claims 1 to 6, characterized in that: The assembly method comprises: Step 1: The assembly platform positions the steel floor to a predetermined position of the steel floor; Step 2: The assembly platform presses the steel floor that is already located at the predetermined position of the steel floor, and the assembly platform positions the bottom side beam on one side to the predetermined position of the first bottom side beam; Step 3: The assembly platform positions the bottom cross beam to the predetermined position of the bottom cross beam, the bottom cross beam at the predetermined position of the bottom cross beam is located above the steel floor and one side of the bottom cross beam abuts against the inner side of the bottom side beam at the predetermined position of the first bottom side beam; Step 4: The assembly platform positions the bottom side beam on the other side to a predetermined position of the second bottom side beam, and the inner side of the bottom side beam at the predetermined position of the second bottom side beam abuts against the other side of the bottom cross beam.

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