A painting support device for a double-deck cargo compartment and a method for using the same

Abstract

The present application relates to the field of coating equipment, in particular to a double-layer cargo compartment coating support device and its use method, comprising a basic support frame; The basic support frame is provided with a support unit; The support unit comprises a first support unit and a second support unit; The first support unit comprises a support mechanism distributed on the basic support frame; The second support unit comprises an upper support structure distributed at both ends of the basic support frame; The upper support structure comprises a rotating structure and a support mechanism; The upper support structure can rotate relative to the basic support frame through the rotating structure; The present application can realize the synchronous installation of two cargo compartments through the setting of the first support unit and the second support unit, and can realize the transfer of one cargo compartment trolley for two cargo compartments during subsequent coating production, greatly improving the use efficiency of the cargo compartment trolley, and coating two cargo compartments at a time can significantly improve the production line capacity.

Description

Technical Field

[0001] This invention relates to the field of coating equipment, specifically a coating support device for double-layer cargo boxes and its usage method. Background Technology

[0002] Currently, painting workshops are adapting to flexible mixed-line production of different products. In order for the production line to meet the production tasks of multiple vehicle models, the general automotive cargo box painting process is fixed to the pre-treatment lifting fixture and topcoat skid through tooling brackets. Currently, only one cargo box is fixed on each tooling bracket, and each cargo box occupies the production capacity of one vehicle during painting production. In view of the efficiency problem of the current painting production line, which is that only one cargo box is fixed on each tooling bracket and each cargo box occupies the production capacity of one vehicle during painting production, an auxiliary device that can improve the painting production efficiency is needed. Summary of the Invention

[0003] The purpose of this invention is to provide a cargo box painting support device that can improve painting efficiency.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A painting support device for a double-decker cargo box, characterized in that it includes a basic support frame; and the basic support frame is provided with a support unit.

[0006] The erection support unit includes a first-layer support unit and a second-layer support unit;

[0007] The first-layer support unit includes a lower-layer support structure distributed at both ends of the basic support frame;

[0008] Each lower support structure includes at least two spaced-apart support mechanisms;

[0009] The second-layer support unit includes an upper support structure distributed at both ends of the basic support frame;

[0010] Each of the upper support structures includes a rotating structure and a support mechanism disposed on the rotating structure;

[0011] The upper support structure can rotate relative to the basic support frame via a rotating structure; the height of the support mechanism in the upper support structure from the basic support frame is greater than the maximum height of the support mechanism in the lower support structure.

[0012] Each of the aforementioned support mechanisms includes a support column, on which a mounting block is provided, and on which a mounting trough is provided; the mounting block and the support column can be connected in a detachable manner; the bottom surface of the mounting trough is a plane or an inclined plane.

[0013] The support columns in the lower support structure at both ends of the basic support frame in the first-layer support unit have different heights; the upper support structures at both ends of the basic support frame in the second-layer support unit have different heights.

[0014] The rotating structure includes a bottom support column connected to the base support frame; a support arm is provided on the bottom support column, and the support arm is connected to the bottom support column through a rotating shaft; the support arm includes two individual support arms, one end of each of the two individual support arms is connected to the rotating shaft, and the other end is connected through a crossbeam arm; the support mechanism in the upper support structure is distributed on the support arm.

[0015] The shortest interval between two lower support structures on the basic support frame is less than the shortest interval between two upper support structures on the basic support frame; the two upper support structures are distributed on opposite sides of a single support unit.

[0016] The basic support frame includes a main support frame and a pallet support frame; the main support frame includes two lateral side beams arranged opposite each other, and the ends of the lateral side beams are connected by transverse end beams.

[0017] The pallet support frame includes two spaced pallet support longitudinal beams; the distance between the two pallet support longitudinal beams is greater than the distance between the two lateral side beams.

[0018] The two pallet support longitudinal beams are connected by crossbeam units;

[0019] The crossbeam unit includes an upper crossbeam unit and a lower crossbeam unit, which are respectively connected to the pallet support longitudinal beam.

[0020] The upper beam unit and the lower beam unit are connected on opposite sides of the main frame of the support; the upper beam unit is arranged near the side of the main frame of the support and close to the support unit.

[0021] The basic support frame includes at least one pallet support frame, which can be connected to the main frame of the bracket by fasteners or welding; the mounting block in the support mechanism can be connected to the cargo box to be painted by fasteners.

[0022] A lower support structure with one layer of support unit located at one end of the basic support frame is arranged on the pallet support frame; the other end is connected to the main frame of the bracket or another pallet support frame; the main frame of the bracket and the pallet support frame can move relative to each other.

[0023] The basic support frame also includes an auxiliary support frame and / or a hoisting beam; the auxiliary support frame is arranged at one end of the main frame of the support.

[0024] A method of using the aforementioned painting support device for double-decker cargo boxes includes the following steps:

[0025] Step 1: Identify the cargo box to be painted; then install the cargo box;

[0026] Step 1.1: Installation of the lower cargo compartment;

[0027] The rotating structure ensures that the support mechanism in the upper support structure is not located above the support mechanism of the first-level support unit;

[0028] Then the cargo box is hoisted onto the primary support unit, so that the lower crossbeam of the cargo box falls onto the various support mechanisms of the primary support unit;

[0029] Then, the cargo box is fixed to the primary support unit;

[0030] Step 1.2: Installation of the upper cargo compartment;

[0031] The rotating structure allows the support mechanism in the upper support structure to be positioned above the support mechanism in the first-level support unit.

[0032] Then the cargo box is hoisted onto the secondary support unit, so that the lower crossbeam of the cargo box falls onto the various support mechanisms of the secondary support unit;

[0033] Then, the cargo box is fixed to the secondary support unit;

[0034] Step 2: Coating production transfer;

[0035] Upper Skid: Use a forklift to insert into the main frame of the support structure and lower the pallet support beam of the device onto the skid pallet;

[0036] Hanging the lifting sling: Transfer the sling to the pre-treatment lifting sling and insert the four support points of the sling into the lifting beam's lifting sling holes;

[0037] Processing: The painting support device undergoes pretreatment electrophoresis, PVC coating, and spray painting along with the cargo box;

[0038] Step 3: Disassemble the cargo box;

[0039] Unloading the upper cargo box: Loosen the fasteners on the upper cargo box and use a crane to remove it;

[0040] Then rotate the upper support structure of the secondary support unit;

[0041] Unloading the lower cargo compartment: Loosen the fasteners on the lower cargo compartment and use a crane to remove it;

[0042] Step 4: After completing Step 3, the painting support device is considered to have been used once.

[0043] The advantages of this invention are:

[0044] This invention discloses a painting support device for double-layer cargo boxes and its usage method.

[0045] This invention enables the simultaneous installation of two cargo compartments through the setup of a single-layer support unit and a double-layer support unit. During subsequent painting production, one cargo compartment trolley can transport two cargo compartments, greatly improving the efficiency of the cargo compartment trolley. At the same time, painting two cargo compartments at once can significantly increase the production line capacity.

[0046] In this invention, the upper support structure of the two-layer support unit is a rotating component; this can prevent the presence of the two-layer support unit from affecting the lowering and lowering of the cargo box on the first-layer support unit.

[0047] The most significant advantage of this device is that it allows a single skid to simultaneously secure two cargo compartments. In a coating production line (pretreatment electrophoresis, PVC, spray painting), this means that under the same production cycle and line speed, the number of cargo compartments processed per unit time is doubled, thereby significantly increasing the capacity of the coating workshop.

[0048] By increasing the load capacity per transport, the number of skids required, the occupancy of pre-processing spreaders, and the frequency of operation of transfer trolleys can be reduced, thereby reducing the initial investment in equipment and long-term energy and maintenance costs.

[0049] The device features a 180° rotatable upper support mechanism; this design ensures that loading and unloading of the upper and lower cargo compartments do not interfere with each other: the lower and upper support structures can have different heights at both ends of the base frame, and the spacing between the support points can also be different. This allows the invention to quickly drain liquids, preventing the accumulation of liquids such as electrophoresis solutions inside the cargo compartment.

[0050] The basic frame includes a main support frame and a tray support frame, which can be connected with fasteners for easy installation and replacement. The "placement block" in the support mechanism is also designed to be detachable. When it wears out after long-term use, only the placement block needs to be replaced instead of the entire support column, reducing maintenance costs.

[0051] The basic support frame integrates the main support frame, pallet support longitudinal beams, and multi-layer crossbeam units. It has high structural strength and can stably bear the weight of two cargo compartments, ensuring reliability during operation. At the same time, the relative position of the main support frame and the pallet support frame can be adjusted as needed, that is, the position of the pallet support frame on the main support frame can be adjusted. Attached Figure Description

[0052] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0053] Figure 1 This is a front view of a double-layer fixing device for cargo box painting provided by the present invention;

[0054] Figure 2 This is a top view of a double-layer fixing device for cargo box painting provided by the present invention;

[0055] Figure 3 This is a side view of a double-layer fixing device for cargo box painting provided by the present invention;

[0056] Figure 4 This is a schematic diagram of a double-layer fixing device for cargo box painting provided by the present invention;

[0057] Figure 5 This is an assembly diagram of a double-layer fixing device for cargo box painting provided by the present invention.

[0058] The markings in the above figures are all:

[0059] 1-1. Basic support frame; 1-2. First-layer support unit; 1-3. Second-layer support unit. Detailed Implementation

[0060] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0061] A painting support device for double-layer cargo boxes is characterized by comprising a basic support frame 1-1; the basic support frame 1-1 is provided with erection support units; the erection support units include a first-layer support unit 1-2 and a second-layer support unit 1-3; the present invention, through the setting of the first-layer support unit 1-2 and the second-layer support unit 1-3, can realize the synchronous installation of two cargo boxes, and in subsequent painting production, it can realize the transfer of two cargo boxes by one cargo box trolley, which greatly improves the utilization efficiency of the cargo box trolley, and at the same time, two cargo boxes can be painted at one time, which can significantly increase the production line capacity.

[0062] In this invention, the first-layer support unit 1-2 includes lower support structures 101 distributed at both ends of the basic support frame 1-1; the lower support structures 101 arranged at both ends of the basic support frame 1-1 are mainly used to support and place the cargo box to be painted; specifically, in this invention, each lower support structure 101 includes at least two spaced support mechanisms 1; based on this arrangement, it is equivalent to having 4 support points on the basic support frame 1-1, which can realize the 4-point support installation of the lower cargo box.

[0063] In this invention, the two-layer support unit 1-3 includes an upper support structure 2 distributed at both ends of the basic support frame 1-1; the upper support structure 2 facilitates the elevation support of the upper cargo box to be painted.

[0064] In this invention, each of the upper support structures 2 includes a rotating structure 201 and a support mechanism 1 disposed on the rotating structure 201; the rotating structure 201 is provided to avoid the presence of the secondary support unit affecting the lowering of the cargo box on the primary support unit.

[0065] Furthermore, in this invention, the upper support structure 2 can rotate relative to the basic support frame 1-1 via the rotating structure 201; the rotating structure 201 allows for subsequent assembly and avoidance of the upper support structure 2.

[0066] In addition, in this invention, the height of the support mechanism 1 in the upper support structure 2 from the base support frame 1-1 is greater than the maximum height of the support mechanism 1 in the lower support structure 101; this makes the upper support structure 2 and the lower support structure 101 have a significant height difference, and this height difference is generally greater than the height of the cargo box to be painted, which facilitates the installation interference between the upper support structure 2 and the cargo box installed on the lower layer.

[0067] Furthermore, in this invention, each of the supporting mechanisms 1 includes a supporting column 11, on which a mounting block 12 is provided, and on which a mounting groove 121 is provided; the mounting block 12 and the supporting column 11 can be connected in a detachable manner; the bottom surface of the mounting groove 121 is a plane or an inclined plane; this invention provides multiple supporting mechanisms 1, which are provided in both the first-layer supporting unit 1-2 and the second-layer supporting unit 1-3, and the specific number and position can be selected according to the actual working conditions.

[0068] In this invention, the support mechanism 1 includes a support column 11 and a mounting block 12; the mounting block 12 is installed on the top of the support column 11. The mounting block 12 and the support column 11 are connected by a detachable method (such as bolt connection, pin connection, or quick-release buckle connection). The mounting block 12 has a mounting groove 121 for accommodating and positioning the front and rear crossbeams of the lower part of the cargo box. The bottom surface of the mounting groove 121 is constructed as a plane or slope to adapt to different structural shapes of the cargo box bottom beams; it also adapts to the inclined arrangement of the cargo box. During the painting production process, the mounting block 12, as a component in direct contact with the cargo box, bears the pressure, wear and tear from the weight of the cargo box and the corrosion from pretreatment chemicals (acids, alkalis) for a long time, making it the most easily worn component in the entire tooling. By adopting a detachable connection, when the mounting block 12 is worn or corroded to its limit, the operator does not need to disassemble and scrap the entire support column 11 or the entire tooling frame; they only need to loosen the fasteners and replace it with a new mounting block 12. This modular replacement method greatly reduces spare parts costs and minimizes equipment downtime for maintenance.

[0069] Different models of cargo boxes may have different cross-sectional shapes, widths, or inclination angles for their bottom crossbeams. When the production line switches between different car models (e.g., from producing type A cargo boxes to type B cargo boxes), it is not necessary to replace the entire double-layer fixing device. Only the matching special mounting block 12 needs to be replaced for the bottom crossbeam structure of the type B cargo box. This enables the device to produce multiple car models on the same line, improving the flexibility of the production line.

[0070] When the cargo box is hoisted and lowered into the corresponding support mechanism 1, the bottom crossbeam of the cargo box directly engages in the settling tank, enabling rapid rough positioning and reducing the time required for manual adjustment. Simultaneously, during the electrophoresis process in pre-coating treatment, the circulation of the bath solution generates impact force. The settling tank structure effectively restricts the cargo box's horizontal forward / backward and left / right displacement, preventing it from slipping off the support points. Combined with wire locking mechanisms, this ensures stability during transportation and processing.

[0071] The design of the plane or slope of the bottom surface of the caisson 121 is determined based on the actual shape or layout direction of the cargo box bottom beam.

[0072] Furthermore, in this invention, the support columns 11 in the lower support structure 101 located at both ends of the basic support frame 1-1 in the first-layer support unit 1-2 have different heights; the upper support structure 2 in the second-layer support unit 1-3 located at both ends of the basic support frame 1-1 also has different heights. The first-layer support unit 1-2 (lower layer) and the second-layer support unit 1-3 (upper layer) each employ a non-equal height design:

[0073] Lower layer height difference: The lower layer support structure 101 located at the front and rear ends of the basic support frame 1-1 has support columns 11 with different heights.

[0074] Upper layer height difference: Similarly, the upper layer support structure 2 located at the front and rear of the basic support frame 1-1 also has a height difference. The reason for the height difference between the two may be that the height of the support column 11 is designed to be different.

[0075] The height difference of the upper layer can also be achieved by the different heights of the bottom support column 202 or the rotating shaft 21, which can be selected according to the needs.

[0076] As seen in the attached diagram, the paint support device for the cargo compartment is unevenly heighted, with the left side lower and the right side higher. This design primarily optimizes drainage and prevents liquid accumulation defects. During pre-treatment (degreasing, phosphating, electrophoresis) and post-rinsing processes, the paint solution needs to drain quickly from both the inner and outer surfaces of the cargo compartment. The height difference between the front and rear sections, combined with the cargo compartment's bottom structure, artificially creates a slight flow gradient. Even if the cargo compartment's bottom beams are flat, the height difference allows the entire compartment to tilt slightly, guiding the paint solution towards a specific direction (usually the side with drainage holes) for rapid outflow. This active flow-guiding design significantly reduces liquid residue in the cargo compartment's dead corners, preventing quality problems such as electrophoretic pinholes, corrosion, or watermarks after drying caused by liquid accumulation.

[0077] Furthermore, in this invention, the rotating structure 201 includes a bottom support column 202 connected to the basic support frame 1-1; a support arm 22 is provided on the bottom support column 202, and the support arm 22 is connected to the bottom support column 202 through a rotating shaft 21; the support arm 22 includes two individual support arms 221, one end of each of the two individual support arms 221 is connected to the rotating shaft 21, and the other end is connected through a crossbeam arm 222; the support mechanism 1 in the upper support structure 2 is distributed on the support arm 22; the rotating structure 201 is the core component in the support device for realizing the installation of the upper cargo box, mainly including the bottom support column 202: the bottom support column 202 serves as the base of the rotating structure 201, is fixedly connected to the basic support frame 1-1, and provides stable vertical support for the entire secondary support unit. The support arm 22 is the main skeleton of the secondary support unit, consisting of two individual support arms 221 and one crossbeam arm 222. Two single support arms 221 are arranged in parallel and spaced apart. One end of each arm is connected to the rotating shaft 21, and the other end is connected and fixed by the crossbeam arm 222, forming an "A"-shaped rigid frame.

[0078] The rotating shaft 21 serves as the core kinematic pair, connecting the support boom 22 to the bottom support column 202, enabling the entire support boom 22 to rotate (e.g., rotate 180°) in the horizontal plane around the central axis of the shaft.

[0079] The support mechanism 1 arranged in the upper support structure 2 is used to support the upper cargo box; the support mechanism 1 in the upper support structure 2 is not directly installed on the rotating shaft 21, but is distributed on the crossbeam arm 222 of the support boom 22.

[0080] This invention allows the entire upper support boom 22 to rotate 180° outward or inward via the rotating shaft 21. When loading or unloading the lower cargo compartment is required, the upper support boom 22 can be unscrewed. Figure 5(Status) to free up vertical space for the hoisting of the lower cargo compartment, preventing the upper support mechanism 1 from becoming an obstacle. When it is necessary to install the upper cargo compartment, rotate it back to the working position ( Figure 4 (Status). This rotating avoidance design is the basis for realizing the "dual-layer" function, ensuring that the loading and unloading operations of the upper and lower cargo compartments do not interfere with each other, and the process is clear.

[0081] This invention cleverly resolves the contradiction between motion (rotational avoidance) and load-bearing (supporting the cargo box) through the combination of "base + rotating shaft 21 + rigid frame". It concentrates the rotational freedom at the bottom, while distributing the load-bearing function to the upper rigid frame, thus ensuring both flexibility and absolute stability of the upper cargo box during the painting process.

[0082] Furthermore, in this invention, the shortest interval between the two lower support structures 101 on the basic support frame 1-1 is less than the shortest interval between the two upper support structures 2 on the basic support frame 1-1; the two upper support structures 2 are distributed on opposite sides of the first-layer support unit 1-2; this arrangement is equivalent to the upper support structure 2 being outside the lower support structure 101. This arrangement facilitates the rotation of the support mechanism 1 in the upper support structure 2, so that the upper support mechanism 1 is not above the lower support mechanism 1, thus playing a good avoidance role.

[0083] Furthermore, in this invention, the basic support frame 1-1 includes a main support frame 1-11 and a pallet support frame 1-12; the main support frame 1-11 includes two opposing lateral side beams 1-111, the ends of which are connected by transverse end beams 1-112; the pallet support frame 1-12 includes two spaced pallet support longitudinal beams 1-121; the distance between the two pallet support longitudinal beams 1-121 is greater than the distance between the two lateral side beams 1-111; the two pallet support longitudinal beams 1-121 are connected by crossbeam units; the crossbeam unit includes an upper crossbeam unit 1-122 and a lower crossbeam unit 1-123, the upper crossbeam unit 1-122 and the lower crossbeam unit 1-123... 3 are respectively connected to the pallet support longitudinal beams 1-121; the upper crossbeam unit 1-122 and the lower crossbeam unit 1-123 are connected to the opposite sides of the main frame 1-11 of the support; the upper crossbeam unit 1-122 is arranged close to the side of the main frame 1-11 of the support and close to the side where the support unit is erected; the basic support frame 1-1 of this invention is essentially a multi-frame nested structure. The basic support frame 1-1 of this invention mainly includes the main frame 1-11 of the support and the pallet support frame 1-12; the main frame 1-11 of the support (including the side beams 1-111 and the transverse end beams 1-112) is the main body for installing the support unit (first-layer and second-layer support); the pallet support frame 1-12 is the longitudinal support and is convenient for use with external equipment (skids).

[0084] The spacing between the two longitudinal beams of the pallet support frame 1-12 is designed to be greater than the spacing between the two lateral beams 1-111 of the main support frame 1-11. This creates a "narrow inside, wide outside" layout, ensuring the stability of the entire painting support device during subsequent placement.

[0085] Two pallet support longitudinal beams 1-121 are connected as a whole by upper and lower crossbeam units. Each crossbeam unit is further subdivided into an upper crossbeam unit 1-122 and a lower crossbeam unit 1-123. The upper crossbeam unit 1-122 and the lower crossbeam unit 1-123 are respectively connected to opposite sides of the main frame 1-11 of the support (i.e., one above the other). This arrangement allows the pallet support longitudinal beams 1-121 to be essentially clamped onto the main frame 1-11 of the support, ensuring the stability of the connection position.

[0086] The upper beam unit 1-122 and the lower beam unit 1-123 are arranged on both sides of the main frame 1-11 of the support. The upper beam unit 1-122 and the lower beam unit 1-123 form a groove-like structure, which facilitates the sliding of the subsequent pallet support frame 1-12 on the main frame 1-11 of the support.

[0087] For subsequent tightening, bolts can be used to connect the upper crossbeam unit 1-122 to the main frame 1-11 of the support. Similarly, bolts can be used to connect the lower crossbeam unit 1-123 to the main frame 1-11 of the support. To facilitate multi-position connections, multiple fixing holes can be provided on the main frame 1-11 of the support.

[0088] In this invention, the upper beam unit 1-122 includes multiple individual upper beams, and each individual upper beam is connected to the pallet support longitudinal beam 1-121 at both ends through a longitudinal beam body; the lower beam unit 1-123 includes individual lower beams, and each individual lower beam is connected to the pallet support longitudinal beam 1-121 at both ends.

[0089] Furthermore, the basic support frame 1-1 in this invention includes at least one pallet support frame 1-12, and generally two can be provided. The specific number can be controlled according to the length of the basic support frame 1-1. In this invention, the pallet support frame 1-12 can be connected to the main support frame 1-11 by fasteners or welding. Fastener connection is generally used. With this connection method, the position of the pallet support frame 1-12 can be changed as needed during subsequent use.

[0090] Similarly, the mounting block 12 in the support mechanism 1 of the present invention can be connected to the cargo box to be painted by fasteners; this setting facilitates the connection between the cargo box to be painted and the painting support device, and the cargo box and the painting support device can be fixed without the use of steel wire locks.

[0091] In this invention, a lower support structure 101 of a support unit 1-2 located at one end of a base support frame 1-1 is arranged on a pallet support frame 1-12; the other end is connected to a main support frame 1-11 or another pallet support frame 1-12; the main support frame 1-11 and the pallet support frame 1-12 can move relative to each other; based on this design, the pallet support frame 1-12 can move on the main support frame 1-11; the spacing between the support units at both ends of the base support frame 1-1 can be changed, and the spacing of the corresponding support units can be adapted as needed, thereby improving the applicability of this invention.

[0092] Of course, in order to better achieve the above objectives, the upper support structure 2 of the present invention can also be connected to the pallet support frame 1-12; the connection method can be welding or screwing.

[0093] The basic support frame 1-1 includes at least one pallet support frame 1-12, which is assembled with the main support frame 1-11 by fastener connection or welding. The lower support structure 101 in the first-layer support unit 1-2 has one end arranged on the pallet support frame 1-12 and the other end connected to the main support frame 1-11 (or another pallet support frame 1-12).

[0094] This modular and adjustable design brings the following significant benefits to the equipment: it enables length adjustment to accommodate multiple cargo box sizes; and the main support frame 1-11 and pallet support frame 1-12 can move relative to each other. Different cargo box models have significantly different length dimensions (the distance between the front and rear crossbeams). By loosening the fasteners and adjusting the relative positions of the main support frame 1-11 and pallet support frame 1-12, the span between the lower support structures 101 (front and rear support points) at both ends can be precisely changed. This allows a single tooling unit to be compatible with the production of various cargo boxes of different sizes through simple length adjustments, greatly improving the flexible co-line production capability of the equipment and reducing the cost and time required to replace the entire tooling unit due to vehicle model changes.

[0095] Instead of a fully welded monolithic structure, it employs fastener connections. This allows the massive frame to be disassembled into several modules, such as the main support frame 1-11 and the pallet support frame 1-12, which are manufactured separately, reducing the processing difficulty and transportation challenges of large tooling. During long-term use, if a module (such as the pallet support longitudinal beam 1-121, which frequently comes into contact with the skid) experiences severe wear or deformation, only the fasteners need to be removed, and the damaged module can be replaced individually, without scrapping the entire basic frame.

[0096] This invention features flexible layout and scalability. For extra-long cargo boxes, a pallet support frame 1-12 can be connected to each end of the main frame 1-11 to form a three-point support or a longer span. For standard cargo boxes, only one end may need to use a pallet support frame 1-12. This layout allows the basic frame to flexibly adapt to cargo boxes of different sizes and different production line interface requirements.

[0097] In this invention, the basic support frame 1-1 also includes an auxiliary support frame and / or a hoisting beam; the auxiliary support frame is arranged at one end of the main support frame 1-11; the auxiliary support frame is mainly used to cooperate with support components of different support heights, while the hoisting beam is mainly to facilitate the hoisting and transportation of the painting support device.

[0098] A method of using the aforementioned painting support device for double-decker cargo boxes includes the following steps:

[0099] Step 1: Identify the cargo box to be painted; then install the cargo box;

[0100] Step 1.1: Installation of the lower cargo compartment;

[0101] The rotating structure 201 ensures that the support mechanism 1 in the upper support structure 2 is not located above the primary support unit support mechanism 1.

[0102] Then the cargo box is hoisted onto the first-level support unit, so that the lower crossbeam of the cargo box falls onto each support mechanism 1 of the first-level support unit;

[0103] Then, the cargo box is fixed to the primary support unit;

[0104] Step 1.2: Installation of the upper cargo compartment;

[0105] The rotating structure 201 is used to position the support mechanism 1 in the upper support structure 2 above the support mechanism 1 in the first-level support unit.

[0106] Then the cargo box is hoisted onto the secondary support unit, so that the lower crossbeam of the cargo box falls onto each support mechanism 1 of the secondary support unit;

[0107] Then, the cargo box is fixed to the secondary support unit;

[0108] Step 2: Coating production transfer;

[0109] Upper Skid: Use a forklift to insert into position 1-11 of the main frame of the bracket and lower the pallet support beam 1-121 of the device onto the skid pallet;

[0110] Hanging the lifting sling: Transfer the sling to the pre-treatment lifting sling and insert the four support points of the sling into the lifting beam's lifting sling holes;

[0111] Processing: The painting support device undergoes pretreatment electrophoresis, PVC coating, and spray painting along with the cargo box;

[0112] Step 3: Disassemble the cargo box;

[0113] Unloading the upper cargo box: Loosen the fasteners on the upper cargo box and use a crane to remove it;

[0114] Then rotate the upper support structure 2 of the secondary support unit;

[0115] Unloading the lower cargo compartment: Loosen the fasteners on the lower cargo compartment and use a crane to remove it;

[0116] Step 4: After completing Step 3, the painting support device is considered to have been used once.

[0117] Specific steps:

[0118] Installation phase (step 1): Follow the principle of bottom to top.

[0119] Lower layer installation: First, rotate the upper support structure 2 to create unobstructed hoisting space for the lower layer.

[0120] Upper-level installation: After the lower-level cargo box is fixed, rotate the upper-level support structure 2 back to the working position to hoist and fix the upper-level cargo box.

[0121] Production transfer phase (step 2): Define the docking process between the device and the production line equipment.

[0122] Upper skid: Use a forklift to place the entire device onto a standard skid.

[0123] Hanging the lifting device: Transfer the device to the pretreatment lifting device and complete the mechanical locking.

[0124] Processing: The equipment accompanies the process and completes all coating processes.

[0125] Disassembly stage (step 3): Follow the principle of top to bottom.

[0126] Unloading the upper layer: First, remove the fixings to the upper cargo compartment and lift it away.

[0127] Unloading the lower level: Rotate the upper support structure 2 again (to avoid it), and then lift the lower cargo compartment away.

[0128] Cycle preparation (step 4): The device is returned to an idle state, waiting for the next cycle.

[0129] This method of use is closely coupled with the structural design of the device, resulting in the following significant benefits: The "rotation of structure 201" is performed before both the installation and disassembly of the lower layer. By rotating the upper support structure 2, it is ensured that the upper components will not become obstacles when hoisting the lower cargo compartment, avoiding the risk of the cargo compartment bumping or falling due to spatial interference. After rotation, the operator can have a clear view to observe the lower cargo compartment falling into the support slot, improving alignment accuracy. Following the "bottom-to-top" installation sequence and the "top-to-bottom" disassembly sequence conforms to the principle of center of gravity stability. When unloaded, the lower layer is installed first, resulting in a low center of gravity and device stability; when fully loaded, the upper layer is unloaded first, gradually lowering the center of gravity and preventing the device from tipping over due to sudden unloading from the upper part.

[0130] Through a simple rotational motion, the same support mechanism 1 can serve different purposes at different times. The existence of the rotating structure 201 allows the loading and unloading operations of the upper and lower cargo compartments to be completely staggered in time, but spatially reused. Operators do not need complicated disassembly and assembly tools; a simple rotational motion is all that is needed to switch between "single-layer mode" and "double-layer mode," greatly simplifying the operation process and improving loading and unloading efficiency.

[0131] The method of use disclosed in this invention clearly utilizes the standardized interfaces on the device (the pallet support longitudinal beams 1-121 are used for lowering the skid, and the lifting tool holes on the lifting beams are used for hanging the lifting tools). This means that by introducing this double-layer device, it can be put into use directly without modifying existing painting production lines (such as skids, lifting tools, and transfer trolleys), reducing technical modification costs and implementation difficulties.

[0132] Example:

[0133] The present invention discloses a painting support device for a double-layer cargo box, which mainly includes a basic support frame 1-1, a first-layer support unit 1-2 and a second-layer support unit 1-3 disposed on the basic support frame 1-1; the first-layer support unit 1-2 includes four support mechanisms 1; the second-layer support unit 1-3 includes two upper support structures 2; each upper support structure 2 includes two spaced-apart support mechanisms 1.

[0134] The basic support frame 1-1 of the present invention includes a main support frame 1-11 and a lifting beam disposed on the main support frame 1-11; the lifting beam is provided with lifting holes.

[0135] When the upper part of the lower cargo box is installed and fixed, the front and rear rotating shafts 21 of the upper layer rotate 180° respectively to facilitate the installation and fixing of the lower cargo box. After the lower cargo box is fixed, the front and rear rotating shafts 21 of the upper layer rotate back to fix the upper cargo box on the front and rear support mechanism 1 of the upper layer, thereby achieving the effect of fixing two cargo boxes with one tooling bracket.

[0136] In this invention, the support mechanism 1 in the two-layer support unit 1-3 can rotate, effectively avoiding the problem that the lower cargo box cannot be fixed, thereby achieving the purpose of fixing two cargo boxes with one tooling bracket, doubling the production efficiency of cargo box painting, and saving 50% of the manual energy cost of cargo box production.

[0137] The coating support device disclosed in this invention enables two cargo boxes to be fixed on one skid simultaneously during coating production.

[0138] The basic support frame 1-1 disclosed in this invention includes a main support frame 1-11, a pallet support frame 1-12, an auxiliary support frame, and a hoisting beam.

[0139] Based on the above structure, detailed operating instructions are as follows:

[0140] 1. Installation of the lower cargo compartment: First, rotate support mechanism 1 in the secondary support unit 180°. For the state of the upper support mechanism 1 after rotation, please refer to [link / reference needed]. Figure 5 The cargo box is hoisted onto the lower support mechanism 1 of the painting support device using the KBK device. The front and rear crossbeams of the lower part of the cargo box are respectively placed into the placement trough 121 in the lower support mechanism 1. Then, steel wire locks are used to fix the cargo box to the painting support device to prevent it from falling during transportation and from drifting in the electrophoresis process before painting.

[0141] 2. Installation of the upper cargo compartment: First, rotate support mechanism 1 in the secondary support unit 180°. For the state of the upper support mechanism 1 after rotation, please refer to [link / reference needed]. Figure 4 The cargo box is hoisted onto the upper support point of the painting support device using the KBK device. The front and rear crossbeams of the lower part of the cargo box are respectively placed into the placement trough 121 in the upper support mechanism 1. Then, steel wire locks are used to fix the cargo box to the painting support device to prevent it from falling during transportation and from drifting in the electrophoresis process before painting.

[0142] When using the painting support device in painting production: An electric forklift is used to insert the main frame of the support device (position 1-11) to lower the pallet support beam 1-121 onto the skid pallet. After passing through the loading and unloading station, it is transferred to the pre-treatment lifting device. The four support points of the lifting device are inserted into the lifting device holes of the lifting beam. The lifting device and the painting support device are locked by manually moving the lifting device support locking device. Then, the painting support device completes the pre-treatment electrophoresis, PVC, spray painting and other painting production processes together with the cargo box. At the wax injection station, the main frame of the support device (position 1-11) is fixed and lifted with straps. After wax injection, it is lifted onto the transfer device and the four support points are lowered into the lifting device holes of the lifting beam. It is then transferred to the unloading station by the transfer trolley.

[0143] Disassembly of the cargo box: First, release the steel wire locks securing the upper cargo box. Use a crane to remove the upper cargo box. Then, rotate the upper support mechanism 1 180°. Refer to the diagram for the state of the upper support mechanism 1 after rotation. Figure 5 Unlock the lower cargo compartment's fixing wire ropes, use a crane to remove the lower cargo compartment, and rotate the upper support mechanism 1 180°. Refer to the image for the state of the upper support mechanism 1 after rotation. Figure 4 .

[0144] After the cargo box is completely removed from the painting support device, the painting support device is transported to the cargo box installation station by the transfer trolley, thus realizing the cyclical use of the double-layer fixing device process.

[0145] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A painting support device for a double-decker cargo box, characterized in that, Includes a basic support frame; the basic support frame is equipped with erection support units; The erection support unit includes a first-layer support unit and a second-layer support unit; The first-layer support unit includes a lower-layer support structure distributed at both ends of the basic support frame; Each lower support structure includes at least two spaced-apart support mechanisms; The second-layer support unit includes an upper support structure distributed at both ends of the basic support frame; Each of the upper support structures includes a rotating structure and a support mechanism disposed on the rotating structure; The upper support structure can rotate relative to the basic support frame via a rotating structure. The height of the support mechanism in the upper support structure from the base support frame is greater than the maximum height of the support mechanism in the lower support structure.

2. The painting support device for a double-layer cargo box according to claim 1, characterized in that, Each of the aforementioned support mechanisms includes a support column, on which a mounting block is provided, and on which a mounting trough is provided; the mounting block and the support column can be connected in a detachable manner; the bottom surface of the mounting trough is a plane or an inclined plane.

3. A painting support device for a double-layer cargo box according to claim 2, characterized in that, The support columns in the lower support structure at both ends of the basic support frame in the first-layer support unit have different heights; the upper support structures at both ends of the basic support frame in the second-layer support unit have different heights.

4. The painting support device for a double-layer cargo box according to claim 1, characterized in that, The rotating structure includes a bottom support column connected to the base support frame; a support arm is provided on the bottom support column, and the support arm is connected to the bottom support column through a rotating shaft; the support arm includes two individual support arms, one end of each of the two individual support arms is connected to the rotating shaft, and the other end is connected through a crossbeam arm; the support mechanism in the upper support structure is distributed on the support arm.

5. A painting support device for a double-layer cargo box according to claim 1, characterized in that, The shortest interval between two lower support structures on the basic support frame is less than the shortest interval between two upper support structures on the basic support frame; the two upper support structures are distributed on opposite sides of a single support unit.

6. A painting support device for a double-layer cargo box according to any one of claims 1-5, characterized in that, The basic support frame includes a main support frame and a pallet support frame; the main support frame includes two lateral side beams arranged opposite each other, and the ends of the lateral side beams are connected by transverse end beams. The pallet support frame includes two spaced pallet support longitudinal beams; the distance between the two pallet support longitudinal beams is greater than the distance between the two lateral side beams. The two pallet support longitudinal beams are connected by crossbeam units; The crossbeam unit includes an upper crossbeam unit and a lower crossbeam unit, which are respectively connected to the pallet support longitudinal beam. The upper beam unit and the lower beam unit are connected on opposite sides of the main frame of the support; the upper beam unit is arranged near the side of the main frame of the support and close to the support unit.

7. A painting support device for a double-layer cargo box according to claim 6, characterized in that, The basic support frame includes at least one pallet support frame, which can be connected to the main frame of the bracket by fasteners or welding; the mounting block in the support mechanism can be connected to the cargo box to be painted by fasteners.

8. A painting support device for a double-layer cargo box according to claim 6, characterized in that, A lower support structure with one layer of support unit located at one end of the basic support frame is arranged on the pallet support frame; the other end is connected to the main frame of the bracket or another pallet support frame; the main frame of the bracket and the pallet support frame can move relative to each other.

9. A painting support device for a double-layer cargo box according to claim 6, characterized in that, The basic support frame also includes an auxiliary support frame and / or a hoisting beam; the auxiliary support frame is arranged at one end of the main frame of the support.

10. A method of using the painting support device for a double-decker cargo box as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Identify the cargo box to be painted; then install the cargo box; Step 1.1: Installation of the lower cargo compartment; The rotating structure ensures that the support mechanism in the upper support structure is not located above the support mechanism of the first-level support unit; Then the cargo box is hoisted onto the primary support unit, so that the lower crossbeam of the cargo box falls onto the various support mechanisms of the primary support unit; Then, the cargo box is fixed to the primary support unit; Step 1.2: Installation of the upper cargo compartment; The rotating structure allows the support mechanism in the upper support structure to be positioned above the support mechanism in the first-level support unit. Then the cargo box is hoisted onto the secondary support unit, so that the lower crossbeam of the cargo box falls onto the various support mechanisms of the secondary support unit; Then, the cargo box is fixed to the secondary support unit; Step 2: Coating production transfer; Upper Skid: Use a forklift to insert into the main frame of the support structure and lower the pallet support beam of the device onto the skid pallet; Hanging the lifting sling: Transfer the sling to the pre-treatment lifting sling and insert the four support points of the sling into the lifting beam's lifting sling holes; Processing: The painting support device undergoes pretreatment electrophoresis, PVC coating, and spray painting along with the cargo box; Step 3: Disassemble the cargo box; Unloading the upper cargo box: Loosen the fasteners on the upper cargo box and use a crane to remove it; Then rotate the upper support structure of the secondary support unit; Unloading the lower cargo compartment: Loosen the fasteners on the lower cargo compartment and use a crane to remove it; Step 4: After completing Step 3, the painting support device is considered to have been used once.

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