Side wall door ring flat type rack

Abstract

The present application relates to the technical field of automobile parts production, and specifically discloses a side wall door ring horizontal placement type rack, which comprises a chassis and a plurality of supporting mechanisms installed on the chassis, each supporting mechanism comprises a stand column and a plurality of supporting pieces rotatably connected to the stand column, the stand column comprises a left stand plate and a right stand plate located on both sides of the supporting pieces, the left stand plate and the right stand plate are in L-shaped / hook-shaped / U-shaped cross section, a plurality of rotating shaft holes and a plurality of limiting holes are arranged on the left stand plate and the right stand plate in the height direction, the supporting pieces are installed on the rotating shaft holes, the supporting pieces comprise a supporting part and a counterweight part located on both sides of the rotating shaft holes, the supporting part is used for supporting the side wall door ring, the supporting part and the counterweight part form an L shape or a V shape, a limiting piece is fixed on the limiting hole, and the limiting piece is used for limiting the maximum rotation angle of the supporting piece after being subjected to external force. The present application is used to solve the problem of low volume rate and high transportation cost existing in the current vertical placement mode.

Description

Technical Field

[0001] This invention relates to the field of automotive parts manufacturing technology, specifically to a side door ring flat rack. Background Technology

[0002] As an indispensable automotive component, the side door ring needs to be formed in the parts production workshop and then sent to the OEM for assembly. To facilitate the transfer of the side door ring, existing technologies have created a vertical rack based on the side door ring's structure. The vertical rack structure is similar to the rack structure in patent publication number CN214649707U. However, when transporting and loading this structure, since the commonly used transport vehicles are flatbed trucks with a height of 2-3 meters (generally 3 meters), the rack plus the vertical door ring exceeds 1.5 meters in height. During transport, it is impossible to stack the rack in two layers, resulting in low utilization of the transport vehicle space, reduced loading rate, reduced volume ratio, and higher transportation costs. Summary of the Invention

[0003] The present invention aims to provide a side-mounted door ring flat material rack to solve the problems of low volume ratio and high transportation cost of the current vertical placement method.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The side door ring flat-lay material rack includes a base frame and multiple support mechanisms mounted on the base frame. Each support mechanism includes a column and multiple support members rotatably connected to the column. The column includes a left vertical plate and a right vertical plate located on both sides of the support member. The cross-section of the left vertical plate and the right vertical plate is L-shaped / hook-shaped / U-shaped. The left vertical plate and the right vertical plate are provided with multiple pivot holes and multiple limiting holes along the height direction. The support members are mounted on the pivot holes. The support members include a support part and a counterweight part located on both sides of the pivot hole. The support part is used to support the side door ring. The support part and the counterweight part form an L-shape or V-shape. Limiting members are fixed on the limiting holes. The limiting members are used to limit the maximum rotation angle of the support member after being subjected to external force.

[0006] The principle of this solution is as follows: In practical application, before the side door ring is placed, the support component consists of a counterweight and a support part. Under the weight of the counterweight, the support part tilts upwards, providing space for the side door ring to move downwards. When placing the bottom side door ring, simply rotate the bottom support component until it can support the side door ring. The support component will then be pressed and rotated under the weight of the bottom side door ring until it is stopped by the limiting component and can no longer rotate. At this point, the bottom side door ring is fully supported by the support component. The lowermost support, under the rotation of the lowest support, has its counterweight pushing it to rotate at a certain angle, allowing it to directly support the flat side door ring. Similarly, the placement of each subsequent side door ring is the same as the previous one. When the side door ring is removed, after the upper side door ring is removed, the support will tilt up under the action of the counterweight, adhering to the column, providing space for the removal of the lower side door ring. This facilitates the rapid automatic loading and unloading of materials by the material rack in conjunction with the robotic arm.

[0007] Compared with existing technologies, it has the following advantages:

[0008] 1. In this solution, the robot arm only needs to perform lifting and lowering movements to complete the retrieval and placement of the side door ring. Compared with the existing technology of vertical placement of the side door ring (vertical placement requires the robot arm to rotate the side door ring to complete the retrieval and placement), the robot arm's movements are simpler when used in conjunction with this solution, which helps to improve the retrieval and placement speed of the side door ring and at the same time reduces the robot arm's working space.

[0009] 2. This solution changes the original vertical placement to a horizontal placement. The height of the horizontal placement is not limited by the size of the side door rings. Therefore, the inventor can control the number of side door rings placed on each material rack according to the height of the flatbed truck. This allows the material racks to be stacked vertically to maximize the use of the flatbed truck's cargo space, improve the cargo loading rate and volume ratio, and greatly reduce transportation costs.

[0010] 3. This solution designs the column as two L-shaped, hook-shaped, or U-shaped uprights. On one hand, this design ensures sufficient support strength for the column formed by the two uprights and increases the contact area between the uprights and the mounting base, thus guaranteeing the column's verticality after welding. On the other hand, it allows for the use of the same sheet material for machining the two uprights. The pivot holes and limiting holes are first laser-drilled, meaning all holes on both uprights are machined in one go, ensuring precise positioning of all holes. Subsequent bending and cutting are then performed using these holes as positioning references, ensuring the coaxiality of the corresponding pivot holes and limiting holes on the column. This guarantees the column's dimensional and positional accuracy, ensuring the precision of subsequent support and limiting component installation and the stability of the side door ring support during use.

[0011] 4. The limiting hole in this solution can be machined together with the rotating shaft hole. When the limiting component is fixed, the limiting component can be directly inserted into the limiting hole, which reduces the processing cost of the support mechanism and improves the processing efficiency of the support mechanism.

[0012] 5. This solution replaces the column with a left upright plate and a right upright plate, with the left and right upright plates located on both sides of the support component. This allows the support component to be supported on both sides by the upright plates, making it easier to make the support component into an integral structure. This simplifies the structure of the support component while ensuring the support strength of the support component for the workpiece.

[0013] Preferably, as an improvement, the cross-sections of the left and right upright plates are hook-shaped, with the pivot hole and limiting hole located on the wing plate with the largest area in the hook-shaped structure. The smaller wing plate on the left and right upright plates, when projected onto the larger wing plate, will not obstruct the pivot hole and limiting hole. This design ensures that the installation of the support component on the pivot hole and the installation of the limiting component on the limiting hole are not obstructed by the upright plate structure, guaranteeing both the strength of the column and the ease of installation of the support and limiting components.

[0014] Preferably, as an improvement, a connecting plate is fixedly connected between the left upright plate and the right upright plate.

[0015] Preferably, as an improvement, the limiting member is located above the counterweight of the corresponding support member, and a reinforcing plate is fixedly connected to the left and right upright plates, with the reinforcing plate and the limiting member located on both sides of the rotating shaft hole.

[0016] Beneficial effects: Because the side door rings are relatively heavy, with a single side door ring weighing about 30 catties, and when transported by ordinary flatbed trucks, two material racks can be stacked, each rack reaching a height of about 1.5 meters, with about 25 side door rings on each rack. Supporting items weighing several hundred kg with multiple uprights, the uprights tend to bend towards one side of the support. However, this solution places the limiting component above the counterweight part away from the support part, which is equivalent to pressing down on the support part from above the counterweight part. The reinforcing plate abuts against the upright from below the support part, making the force on the left and right sides of the upright more even, ensuring that the upright still maintains good verticality under long-term use.

[0017] Preferably, as an improvement, the support portion of the support member is provided with weight-reducing holes, and the counterweight portion is T-shaped.

[0018] Beneficial effects: The support part of this solution is equipped with weight reduction holes and the counterweight part is T-shaped, which allows the support part to be designed to be longer, so that the support component has a sufficiently long support length and a large support area for the side door ring, further improving the support stability of the side door ring during transportation.

[0019] Preferably, as an improvement, multiple guide posts are fixed on the base frame, each guide post having a guide ramp, and the guide post can fit against the contour of the bottommost side door ring.

[0020] Beneficial effects: Since the side door ring is placed by a robotic arm, after the first side door ring is placed, all the remaining side door rings will repeat the placement path of the first side door ring. Therefore, the placement accuracy of the first side door ring is crucial. This solution uses a guide post with a guide slope to enable the first side door ring to be quickly placed into position by the robotic arm, achieving fast and accurate placement of the first side door ring.

[0021] Preferably, as an improvement, the base frame is fixed with a limiting sleeve, at least one column is fixed with a positioning sleeve at its top, and a positioning member in the form of a barb is also included. The two free ends of the positioning member can be simultaneously inserted into the limiting sleeve and the positioning sleeve, and the positioning member can conform to the contour of the side door ring.

[0022] Beneficial effects: During the transportation of side door rings, due to unpredictable road conditions, vibrations and bumps are inevitable. Simply having multiple support members simultaneously support the side door rings cannot guarantee their stability under bumpy road conditions. This solution involves inserting barbed positioning members into the columns and base frame after the side door rings are placed. This allows the positioning members to limit the position of the side door rings from different positions on the outside of the side door rings, ensuring that even when encountering bumps, the side door rings will still be stably supported by the support members.

[0023] Preferably, as an improvement, the base frame is fixed with a recycling bin capable of accommodating the positioning component. When the side door ring is transported to its destination for use, the hook-type positioning component needs to be removed from the material rack before the side door ring can be taken out for use. After the side door ring is removed, the positioning component does not need to be accurately inserted into the limiting sleeve and positioning sleeve; instead, it can be directly placed into the recycling bin, which facilitates the recycling and reuse of the positioning component.

[0024] Preferably, as an improvement, each corner of the base frame is fixedly connected to a corner post, with a support foot at one end and a support sleeve at the other end. The support foot of one material rack can be supported by the support sleeve of another material rack. This design facilitates the stacking of material racks using the support feet and support sleeves, and the structure is simple and convenient.

[0025] Preferably, as an improvement, corner guards are fixed to the corner posts, with the corner guards located on the outside of the base frame, and the upper and lower corners of the corner guards are beveled. In this design, the corner guards can prevent the material racks being hoisted from directly colliding with the uprights of other material racks; and when two material racks collide with the corner posts, the beveled structure can absorb the force, reducing the impact intensity.

[0026] Preferably, as an improvement, a U-shaped connecting plate is connected between the corner column and the adjacent upright column, and the U-shaped connecting plate is located on the outside of the side door ring; this solution allows the external force borne by the upright column to be transmitted to the corner column through the U-shaped connecting plate, thereby reducing the probability of the upright column deforming due to excessive pressure and improving the support strength and support stability of the material rack supporting the side door ring; at the same time, the U-shaped connecting plate being located on the outside of the side door ring will not affect the placement of the side door rings one by one on the material rack.

[0027] Preferably, as an improvement, a connecting plate is fixedly connected between adjacent columns that support the side gate ring from the inside. The presence of the connecting plate in this solution makes the adjacent columns form a whole to support the inside of the side gate ring, further improving the support strength of the side gate ring. Attached Figure Description

[0028] Figure 1 This is an isometric view of an embodiment of the present invention.

[0029] Figure 2 Figure 1 A schematic diagram of the three-dimensional structure from another perspective.

[0030] Figure 3 This is a schematic diagram of the side door ring support method of the present invention.

[0031] Figure 4 This is a three-dimensional structural diagram of the corner column in an embodiment of the present invention.

[0032] Figure 5This is a three-dimensional structural diagram of the corner column from another perspective in an embodiment of the present invention.

[0033] Figure 6 This is an isometric view of the support mechanism according to an embodiment of the present invention.

[0034] Figure 7 Figure 6 A schematic diagram of the three-dimensional structure from another perspective.

[0035] Figure 8 for Figure 6 Top view.

[0036] Figure 9 for Figure 6 A cross-sectional view.

[0037] Figure 10 for Figure 6 A partial longitudinal section view (this state simulates the state of the support after the side door ring is placed).

[0038] Figure 11 This is a partial longitudinal sectional view of the support mechanism according to an embodiment of the present invention before the side door ring is placed. Detailed Implementation

[0039] The following detailed description illustrates the specific implementation method:

[0040] The reference numerals in the accompanying drawings include: support mechanism 10, mounting base 1, strip hole 11, column 2, left upright plate 21, right upright plate 22, limit pin 23, connecting plate 24, pin shaft 25, guide 26, reinforcing plate 27, support 3, rotating part 31, support part 32, weight reduction hole 321, counterweight part 33, positioning sleeve 4, positioning part 5, positioning tube 6, base frame 20, base 201, limit sleeve 202, guide column 203, recycling box 30, corner column 40, support foot 401, limit plate 402, support sleeve 403, corner guard plate 404, U-shaped connecting plate 50, connecting plate 60.

[0041] The basic implementation examples are as follows: Figures 1 to 11 As shown: The side door ring flat material rack includes a base frame 20 and multiple support mechanisms 10 installed on the base frame 20. In this embodiment, there are 4 support mechanisms 10. The four support mechanisms 10 support the side door ring from 4 positions respectively. Each support mechanism 10 includes a mounting base 1, a column 2 and a support member 3 rotatably connected to the column 2. There are multiple support members 3, which are evenly distributed along the height direction of the column 2.

[0042] Combination Figure 1 , Figure 2 and Figure 6The mounting base 1 has multiple slotted holes 11 machined on it, which are located around the column 2. The base 20 of the material rack is fixed with a base 201, which has mounting holes that are aligned with the slotted holes 11. The mounting base 1 and the base 201 are fixedly connected by bolts through the mounting holes and the slotted holes 11. When the verticality of the support mechanism 10 exceeds the allowable deviation after long-term use, the position of the column 2 can be adjusted by placing shims between the base 201 and the mounting base 1 to achieve the purpose of adjusting the verticality of the column 2.

[0043] Combination Figure 1 and Figure 2 A circular positioning sleeve 4 is welded to the top of the column 2. A positioning element 5 can be inserted into the positioning sleeve 4. In this embodiment, the positioning element 5 adopts a hook-shaped structure and has a circular cross-section. A limiting sleeve 202 is welded to the base frame 20. Both ends of the positioning element 5 can be inserted into the positioning sleeve 4 and the limiting sleeve 202 simultaneously. The positioning element 5 is inserted after the side door ring is placed on the material rack. The positioning element 5 can fit against the contour of the side door ring to limit the position of the placed side door ring and improve the stability during transportation. The number of limiting sleeves 202 is more than the number of positioning sleeves 4. Vertical positioning tubes 6 can be inserted into the additional limiting sleeves 202. The positioning tubes 6 can also fit against the contour of the side door ring. A recycling box 30 that can accommodate the positioning element 5 and the positioning tube 6 is fixed to the base frame 20 by screws.

[0044] Multiple guide posts 203 are fixed on the base frame 20. Each guide post 203 has a guide slope machined on it, and the side wall of the guide post 203 can fit against the contour of the bottommost side door ring. This facilitates the guidance of the bottommost side door ring during placement.

[0045] Corner posts 40 are welded to the four corners of the base frame 20. Each corner post 40 has a support foot 401 with a limiting plate 402 welded to its bottom end, and a support sleeve 403 welded to its top end. The support foot 401 of the upper material rack can be inserted into the support sleeve 403 of the lower material rack, and the limiting plate 402 of the upper material rack can be supported by the support sleeve 403 of the lower material rack. This facilitates the stable stacking of the upper and lower material racks.

[0046] Combination Figure 4 and Figure 5 A corner guard plate 404 is fixed on the corner post 40. The corner guard plate 404 is located on the outside of the base frame 20. The upper and lower corners of the corner guard plate 404 are machined with bevels.

[0047] A U-shaped connecting plate 50 is bolted between the corner column 40 and the adjacent column 2. The U-shaped connecting plate 50 is located on the outside of the side gate ring. A connecting plate 60 is bolted between the adjacent columns 2 used to support the side gate ring from the inside, so that the adjacent columns 2 form a whole to support the inside of the side gate ring.

[0048] Combination Figures 6 to 10 The column 2 includes a left vertical plate 21 and a right vertical plate 22 located on both sides of the support member 3. Both the left and right vertical plates 21 and 22 are referred to as vertical plates. The left and right vertical plates 21 and 22 are structurally symmetrical, with L-shaped, hook-shaped, or U-shaped cross-sections. Both the left and right vertical plates 21 and 22 have multiple equally spaced pivot holes and limiting holes along their height. The pivot holes are used to install the support member 3, and the limiting holes are used to install limiting components. The limiting components are limiting pins 23, which limit the maximum rotation angle of the support member 3 under external force. The pivot holes and limiting holes are located on the wing plate with the largest area in the hook-shaped structure. The smaller wing plate on the left and right vertical plates 21 and 22, when projected onto the larger wing plate, will not obstruct the pivot holes and limiting holes.

[0049] The upright plate is processed by first laser drilling (for pivot holes and locating holes) and then bending it into shape. If the upright plate is L-shaped, the processing and forming are the simplest, but the strength of the L-shaped upright plate after welding to the mounting base 1 is not as good as that of the hook-shaped or U-shaped upright plate. The attached drawings of this embodiment use a hook-shaped cross-section of the upright plate as an example (e.g.) Figure 9 (As shown).

[0050] Both the upper and lower ends of the left upright plate 21 and the right upright plate 22 are welded with connecting plates 24 to improve the supporting strength of the column 2 formed by the two upright plates.

[0051] The support member 3 includes a rotating part 31 and a support part 32 and a counterweight part 33 welded to both sides of the rotating part 31. A pin 25 is fixed on the pivot hole of the column 2. The rotating part 31 is in the shape of a round tube and is rotatably connected to the pin 25. The support part 32 is used to support the side door ring. The support part 32 and the counterweight part 33 form an L-shape or a V-shape. In this embodiment, the support part 32 and the counterweight part 33 are V-shaped and connected as one piece. The support part 32 is machined with a weight reduction hole 321. The counterweight part 33 is T-shaped so that the weight of the counterweight part 33 is greater than that of the support part 32. This makes it convenient for the support member 3 to automatically deflect the counterweight part 33 downward when there is no external force, so that the free end of the support part 32 is close to the column 2, providing space for the sequential placement of the side door rings. A guide 26 is welded to the bottom section of the column 2. The guide 26 supports the counterweight 33 in its free state. The guide 26 is located next to the bottom pivot hole, so that the bottom support 3 remains away from the upright plate when the side door ring is not placed, facilitating the direct placement of the bottom side door ring. Figure 11 The state shown.

[0052] The limiting pin 23 is located on the side of the support member 3 near the counterweight 33, and the limiting pin 23 is located above the corresponding support member 3. A triangular reinforcing plate 27 is welded to the bottom of the upright plate, and the reinforcing plate 27 and the limiting pin 23 are located on both sides of the rotating part 31 of the support member 3. When the side door ring is placed on the support member 3, the limiting pin 23 presses down on the support member 3 from above the counterweight part 33, while the reinforcing plate 27 abuts against the column 2 from below the support part 32. This causes the column 2 to tend to bend towards the support part 32 after bearing the weight of multiple side door rings laid flat. In this embodiment, by setting the limiting pin 23 above the counterweight part 33 away from the support part 32, it is equivalent to pressing down on the support member 3 from above the counterweight part 33, while the reinforcing plate 27 abuts against the column 2 from below the support part 32. At the same time, the support part 32 can be designed to be longer under the same weight because of the weight reduction hole 321, thereby increasing the support length and support area for the side door ring. In addition, the hook structure of the hook-shaped column 2 is also located on one side of the support part 32, which strengthens the support strength of the column 2 on the support part 32 side, making the column 2 have a strength that greatly exceeds that of the square tube structure column 2, ensuring that the column 2 still has good verticality under long-term use.

[0053] This embodiment can use a robotic arm to directly and sequentially place and remove the side door rings. The specific implementation process is as follows:

[0054] When placing the side door ring, when placing the first side door ring, except for the bottommost support member 3 which is restricted by the guide member 26 and kept in a state where the support part 32 of the support member 3 is far away from the column 2, the other support members 3 are all attached to the column 2 under the counterweight of the counterweight part 33. That is, it is ensured that except for the bottommost support member 3 which can directly support the side door ring, the support parts 32 of the other support members 3 are all attached to the column 2 (i.e., as shown). Figure 11 As shown in the figure, it provides moving space for the downward placement of the side door ring. When the robot places the first side door ring from top to bottom, the guide post 203 guides the placement of the side door ring, making it easy to place the first side door ring quickly and accurately.

[0055] When the first side door ring is placed, the lowest support member 3 is pressed, and the support part 32 continues to rotate away from the column 2 until the support member 3 is limited by the limiting pin 23, and the first side door ring is placed. At the same time, during the rotation of the lowest support member 3, the counterweight part 33 of the lower support member 3 flips upward and pushes the counterweight part 33 of the lower support member 3 to rotate upward, so that the support part 32 of the lower support member 3 gradually moves away from the column 2 and reaches a state where the second side door ring can be placed. The placement process of the second side door ring is exactly the same as the placement of the first side door ring, and the placement process of the remaining side door rings is also exactly the same. During the entire placement process, the next upper support member 3 will automatically adjust to the pre-support state after the adjacent lower support member 3 has completed supporting the side door ring. After the side door rings are placed, all the support members 3 on the support mechanism 10 reach the state as follows. Figure 10 The state shown.

[0056] Similarly, when the side door ring needs to be removed, the upper side door ring will automatically flip upward and stick to the column 2 after losing pressure, providing space for the side door ring that needs to be removed later.

[0057] Before transporting the side door ring, the positioning element 5 and the positioning tube 6 are inserted into the limiting sleeve 202 and the positioning sleeve 4, so that the side door ring is supported by the support element 3 and limited by the position of the positioning element 5 and the positioning tube 6 on the outer contour of the side door ring, thus ensuring the stability of the side door ring during transportation.

[0058] Compared to existing technologies, this embodiment changes the placement of the side door ring from vertical to horizontal, maximizing the utilization of the cargo space. Taking a horizontally placed side door ring with dimensions of approximately 1560mm*1400mm as an example, when placed vertically, the number of side door rings placed on a flatbed of the same specifications can be changed from a single layer to a double layer (the height of the rack when placed vertically is approximately 1600-1700mm, and when placed horizontally, the rack height can be reduced to 1450mm through quantity control, achieving the purpose of stacking two layers). At the same time, through the spacing design of the upper and lower support members 3, the number of side door rings that can be placed on a single horizontal rack increases from 17 pieces in the original vertical state to 25 pieces, more than doubling the number of pieces, greatly improving the cargo loading rate, and reducing the transportation cost from 16 yuan per piece to less than 3 yuan per piece, significantly reducing transportation costs.

[0059] In addition, by changing the placement of the side door ring from vertical to horizontal, the lifting and lowering motion of the robot arm can complete the picking and placing of the workpiece when the robot arm picks up and places the side door ring, which reduces the requirements for the robot arm and facilitates automated loading and unloading.

[0060] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A side-mounted door ring flat-lay material rack, comprising a base frame and multiple support mechanisms mounted on the base frame, characterized in that: Each support mechanism includes a column and multiple support components rotatably connected to the column. The column includes a left vertical plate and a right vertical plate located on both sides of the support component. The left vertical plate and the right vertical plate are provided with multiple pivot holes and multiple limiting holes along the height direction. The support component is installed on the pivot hole. The support component includes a support part and a counterweight part located on both sides of the pivot hole. The support part is used to support the side door ring. The support part and the counterweight part form an L-shape or V-shape. Limiting components are fixed on the limiting holes. The limiting components are used to limit the maximum rotation angle of the support component after being subjected to external force. The cross-sections of the left and right vertical plates are hook-shaped. The pivot hole and the limiting hole are located on the wing plate with the largest area in the hook-shaped structure. The smaller wing plate on the left and right vertical plates will not block the pivot hole and the limiting hole after being projected onto the larger wing plate. A connecting plate is fixedly connected between the left and right upright plates; The base frame is fixed with a limiting sleeve, and at least one column is fixed with a positioning sleeve on its top. It also includes a positioning member in the shape of a barb, the two free ends of which can be inserted into the limiting sleeve and the positioning sleeve at the same time, and the positioning member can fit against the contour of the side door ring. A guide is welded to the bottom section of the column. The guide can support the counterweight in a free state. The guide is located next to the bottom pivot hole so that the bottom support can keep the support away from the upright plate when the side door ring is not placed. Multiple guide posts are fixed on the base frame, and each guide post is provided with a guide slope, so that the guide post can fit against the outline of the bottom side door ring; A corner post is fixedly connected to each corner of the base frame, and a U-shaped connecting plate is connected between the corner post and the adjacent upright post. The U-shaped connecting plate is located on the outside of the side door ring. A connecting plate is fixedly connected between adjacent uprights used to support the side door ring from the inside.

2. The side-mounted door ring flat-lay material rack according to claim 1, characterized in that: The limiting component is located above the counterweight of the corresponding support component. Reinforcing plates are fixedly connected to the left and right upright plates, and the reinforcing plates and the limiting component are located on both sides of the rotating shaft hole.

3. The side-mounted door ring flat-lay material rack according to claim 1, characterized in that: The support part of the support member is provided with weight reduction holes, and the counterweight part is T-shaped.

4. The side-mounted door ring flat-lay material rack according to claim 1, characterized in that: The base frame is fixed with a recycling bin capable of accommodating the positioning components.

5. The side-mounted door ring flat-lay material rack according to any one of claims 1-4, characterized in that: Each corner post has a support foot at one end and a support sleeve at the other end, so that the support foot of one material rack can be supported by the support sleeve of another material rack.

6. The side-mounted door ring flat-lay material rack according to claim 5, characterized in that: Corner guards are fixed on the corner posts. The corner guards are located on the outside of the base frame, and the upper and lower corners of the corner guards are provided with bevels.

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