Automobile roof dual-web fabric switching and loading device

Abstract

This invention provides a dual-roll material switching and feeding device for automotive headliners, belonging to the field of mechanical equipment technology. It includes a double-layer material rack, a double-layer buffer mechanism, a fabric detector, and a material cutting mechanism arranged sequentially from back to front. The double-layer material rack includes a material support and at least two layers of material racks arranged vertically. Each layer of material rack has a fabric front-drive mechanism at its front end. Each fabric front-drive mechanism selectively, sequentially, or simultaneously feeds the material forward. Different layers of material are driven by their respective front-drive mechanisms, buffered by the double-layer buffer mechanism, and after defect detection by the fabric detector, are fed into the front material cutting mechanism for cutting according to the preset length of each layer of material. This device can simultaneously meet the continuous feeding needs of two headliner production lines, improving feeding efficiency.

Description

Technical Field

[0001] This invention belongs to the field of automotive roof manufacturing technology, specifically relating to a dual-roll material switching and feeding device for automotive roofs. Background Technology

[0002] The material feeding method for automotive headliner fabric roller coating production lines is generally to manually feed sheet-like fabric or to use roll-like fabric on automated equipment. That is, one fabric roller coating production line corresponds to one automotive headliner production line.

[0003] To meet production pace, most automotive headliner production lines currently use fabric roller coating technology. It is common for one fabric roller coating line to correspond to the production of two headliner production lines. However, the fabric can only be fed manually in two types of sheet fabric, A or B, which results in high production costs, low automation, and cannot meet the continuous production of two headliner production lines. This is completely out of step with the current trend of high efficiency and automation in automotive production equipment. Summary of the Invention

[0004] This invention provides a dual-roll material switching feeding device for automotive headliners, which can feed two types of roll materials and simultaneously meet the continuous production needs of two headliner production lines, solving the problem of low feeding efficiency of headliner roll materials and the inability to meet the continuous production needs of multiple headliners.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a double-roll material switching and feeding device for automotive headliners, comprising: a double-layer material rack, a double-layer material buffer mechanism, a fabric detector, and a material cutting mechanism arranged sequentially from back to front; the double-layer material rack includes a material support and at least two layers of material racks arranged vertically, each layer of material rack having a fabric front-driving mechanism at its front end; each fabric front-driving mechanism selectively, sequentially, or simultaneously conveys the material forward, different layers of material are driven by their respective front-driving mechanisms, buffered by the double-layer material buffer mechanism, and after defect detection by the fabric detector, are fed into the front material cutting mechanism for cutting according to the preset length of each layer of material.

[0006] In one possible implementation, the double-layer roll material rack further includes a welding mechanism corresponding to the front of each roll material rack. The welding mechanism is fixed on the roll material support. When the front end of the roll material is at the tail end, the front end of the spare roll material is bonded to the tail end of the front end of the roll material at the welding mechanism.

[0007] In one possible implementation, the welding mechanism includes a frame and heating wires arranged within the frame.

[0008] In one possible implementation, the fabric front drive mechanism includes a fabric front drive motor, a front drive active roller, and a driven roller; the fabric front drive motor is fixed on the roll support, and the front drive active roller and the driven roller are both rotatably mounted on the roll support, with the front drive active roller being drivenly connected to the fabric front drive motor.

[0009] In one possible implementation, the fabric front drive mechanism further includes a driven roller lifting slide, which is fixed on the roll support to adjust the distance between the driven roller and the front drive drive roller.

[0010] In one possible implementation, the roll material rack includes two roll material support rods that are parallel to and fixed on the roll material support, and the roll material support rods are provided with sliding grooves for the roll material to slide.

[0011] In one possible implementation, the roll double-layer buffer mechanism includes a buffer support and a buffer component arranged vertically on the buffer support. The buffer component includes two rows of guide rollers rotatably connected to the buffer support. The two rows of guide rollers are staggered, and the fabric passes over each guide roller in sequence from bottom to top.

[0012] In one possible implementation, the double-layer buffer mechanism further includes two shared frames symmetrically fixed to the buffer support and two pairs of bidirectional linear drive slide rails. A pair of upper adjusting rods and a pair of lower adjusting rods are slidably connected to the bidirectional linear drive slide rails. In the upper and lower buffer components, the lower guide rollers of the upper buffer component and the upper guide rollers of the lower buffer component are rotatably connected to the shared frames. Simultaneously, the two ends of the upper guide rollers of the upper buffer component are rotatably connected to two opposing upper adjusting rods; the two ends of the lower guide rollers of the lower buffer component are rotatably connected to two opposing lower adjusting rods. The bidirectional linear drive slide rails drive the upper and lower adjusting rods to rise and fall, adjusting the fabric tension stored in each buffer component.

[0013] In one possible implementation, the roll cutting mechanism includes a cutting bracket, a cutting component disposed at the front end of the cutting bracket, and a fabric transfer component corresponding to each layer of fabric, wherein one of the fabric transfer components is mounted on the cutting bracket via a lifting drive component.

[0014] In one possible implementation, the fabric conveying assembly includes a fabric drive motor, a horizontal base plate, and a fabric drive roller and a fabric driven roller disposed on the upper and lower sides of the horizontal base plate, wherein the fabric drive roller is driven and connected to the fabric drive motor, and an elongated hole is provided on the horizontal base plate opposite to the fabric drive roller and the fabric driven roller.

[0015] The automotive headliner double roll material switching and feeding device provided by this invention has the following advantages compared with the prior art: the double-layer roll material rack, the double-layer roll material buffer mechanism, the fabric detector, and the roll material cutting mechanism are arranged sequentially from back to front; each fabric front drive mechanism can select one, sequentially, or simultaneously to convey the fabric forward; different layers of roll material are driven by their respective front fabric front drive mechanisms, buffered by the double-layer roll material buffer mechanism, and after being defect-detected by the fabric detector, they are sent to the front roll material cutting mechanism for cutting according to the preset length of each layer of fabric. The fabric is cut alternately, which can simultaneously meet the continuous feeding needs of multiple headliner production lines and improve the feeding efficiency of headliner roll material. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the automotive roof double roll material switching and feeding device provided in an embodiment of the present invention;

[0017] Figure 2 This is a three-dimensional structural schematic diagram of the automotive roof double roll material switching and feeding device provided in an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the structure of the roll double-layer buffer mechanism provided in the embodiment of the present invention. Figure 1 ;

[0019] Figure 4 A schematic diagram of the structure of the roll double-layer buffer mechanism provided in the embodiment of the present invention. Figure 2 ;

[0020] Figure 5 This is a schematic diagram of the structure of the double-layer coil material rack provided in an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of the roll cutting mechanism provided in an embodiment of the present invention. Figure 1 ;

[0022] Figure 7 A schematic diagram of the roll cutting mechanism provided in an embodiment of the present invention. Figure 2 ;

[0023] Figure 8 A schematic diagram of the roll cutting mechanism provided in an embodiment of the present invention. Figure 3 ;

[0024] Figure 9 A flowchart of a dual-roll material switching and feeding device for automotive headliners provided in an embodiment of the present invention;

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Double-layer roll material rack; 101. Roll material support; 102. Roll material; 103. Driven roller lifting slide; 104. Front-drive driven roller; 105. Front-drive driving roller; 106. Welding mechanism; 107. Fabric front drive motor; 108. Roll material support rod; 20. Double-layer roll material buffer mechanism; 201. Guide roller; 202. Bidirectional linear drive slide rail; 203. Upper adjusting rod; 204. Upper reinforcing rod of slide rail; 205. Support frame; 206. Common frame; 207. Bottom crossbeam; 208. Lower adjusting rod; 20 9. Lower reinforcing rod of the slide rail; 210. Frame reinforcing rod; 211. Top crossbeam; 212. Vertical reinforcing rod; 213. Horizontal connecting rod; 214. Pressure plate; 30. Fabric detector; 40. Roll cutting mechanism; 401. Cutting lifting slide; 402. Fabric drive motor; 403. Guide rod; 404. Cutting bracket; 405. Horizontal base plate; 406. Fabric driven roller; 407. Fabric driving roller; 408. Lifting base plate; 409. Front and rear moving slide rail; 410. Installation position of the cutting component; 50. Fabric. Detailed Implementation

[0027] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0028] Please refer to the following: Figure 1 and Figure 2 The present invention will now describe the automotive headliner double roll material switching and feeding device. The automotive headliner double roll material switching and feeding device includes a double roll material rack 10, a double roll material buffer mechanism, a fabric detector 30, and a roll material cutting mechanism 40 arranged sequentially from back to front. The double roll material rack 10 includes a roll material support 101 and at least two layers of roll material racks arranged vertically. Each layer of roll material rack has a fabric front drive mechanism at its front end. Each fabric front drive mechanism can selectively, sequentially, or simultaneously convey the fabric 50 forward. Different layers of roll material are driven by their respective front fabric front drive mechanisms, buffered by the double roll material buffer mechanism, and after defect detection by the fabric detector 30, they are sent to the front roll material cutting mechanism 40 for cutting according to the preset length of each layer of fabric 50.

[0029] The automotive roof double roll material switching and feeding device provided by the present invention has the following advantages compared with the prior art: the roll material double layer rack 10, the roll material double layer buffer mechanism 20, the fabric detector 30 and the roll material cutting mechanism 40 are arranged sequentially from back to front; each fabric front drive mechanism selects one, or sequentially, or simultaneously to convey the fabric 50 forward; different layers of roll material are driven by their respective front fabric front drive mechanisms, buffered by the roll material double layer buffer mechanism, and after being defect-detected by the fabric detector 30, they are sent to the front roll material cutting mechanism 40 for cutting according to the preset length of each layer of fabric 50. This can simultaneously meet the continuous feeding needs of multiple roof production lines and improve the feeding efficiency of roof roll material.

[0030] The following is an example of operating the equipment by simultaneously feeding materials to two production lines, either Canopy A or Canopy B, which correspond to a double-layer material rack, a double-layer buffer mechanism, and a double cutting mechanism.

[0031] like Figure 9 As shown, the fabric front drive mechanism in front of the upper material rack of the production line A in the ceiling receives the start command and drives the upper roll fabric to be conveyed forward. After being buffered by the upper buffer mechanism, the cutting meter feedback indicates that the size of the produced product has reached the requirements, the fabric front drive mechanism stops, and the pneumatic scissors of the upper cutting mechanism automatically complete the cutting of fabric A 50.

[0032] When the upper layer roll material of the corresponding ceiling A production line is being fed, if the ceiling B production line receives the feeding instruction, the fabric front drive mechanism in front of the corresponding lower material rack will drive the lower layer roll material forward and cut it by the pneumatic shears of the lower buffer mechanism and the lower cutting mechanism.

[0033] When the device receives a fabric defect alarm signal, i.e., the fabric detector 30 issues an alarm signal, the meter counter corresponding to material A or material B in the cutting area calculates the current size and feeds it back to the PLC module of the ceiling production line. If it conforms to the product size, the first step is to cut the qualified fabric, and the second step is to advance the fabric and cut the defective part again. The PLC module automatically calculates and controls this process. If it does not conform to the product size, the first step is to cut the defective fabric 50 directly, the corresponding fabric conveyor belt reverses, and the defective fabric falls into the waste bin below. The second step is to transport and cut the qualified fabric 50 normally. The PLC module automatically controls this process.

[0034] When the device receives an alarm signal that the fabric 50 is about to be used up, the PLC module controls the audible and visual alarms. The PLC module automatically starts to control and adjust the shrinkage amount of the buffer mechanism (the shrinkage amount is controlled by a servo) so that the excess amount of the fabric 50 after shrinkage can still be used for cutting at the front end without stopping the machine. At the same time, the personnel are prompted to perform the material change work of the rear roll 102. The second roll of material is manually bonded to the remaining tail end of the first roll of material through the welding mechanism 106. Production continues normally without stopping the machine.

[0035] In some embodiments, such as Figure 5 As shown, the double-layer roll material rack 10 also includes a welding mechanism 106 corresponding to the front of each roll material rack. The welding mechanism 106 is fixed on the roll material support 101. When the front end of the roll material 102 is at the tail end, the front end of the spare roll material is bonded to the tail end of the front end of the roll material 102 at the welding mechanism 106. For example, both the upper and lower racks are provided with three roll materials 102. When the tail end of the front roll material 102 is exposed, the front end of the adjacent second roll material is overlapped with the tail end of the first roll material 102 and welded together at the welding mechanism 106 to ensure the continuity of production.

[0036] In some embodiments, such as Figure 5 As shown, the welding mechanism 106 includes a frame and heating wires arranged within the frame. When the fabric 50 is driven forward, it passes through the frame, and the heat-sealing function of the welding mechanism 106 is only activated when welding is required.

[0037] In some embodiments, such as Figure 5 As shown, the fabric front drive mechanism includes a fabric front drive motor 107, a front drive active roller 105, and a front drive driven roller 104. The fabric front drive motor 107 is fixed on the roll support 101, and the front drive active roller 105 and the front drive driven roller 104 are both rotatably mounted on the roll support 101. The front drive active roller is driven by the fabric front drive motor 107. The fabric front drive motor 107 drives the front drive active roller 105 to rotate, and the fabric 50 is conveyed forward between the front drive active roller 105 and the front drive driven roller 104 through friction.

[0038] In some embodiments, such as Figure 5 As shown, the fabric front-drive mechanism also includes a driven roller lifting slide 103, which is fixed on the roll support 101 to adjust the distance between the driven roller and the front-drive driving roller. Driven roller lifting slides 103 are respectively provided at both ends of the front-drive driven roller 104, and their synchronous operation adjusts the distance between the front-drive driven roller 104 and the front-drive driving roller. This allows for optimal friction transmission by adjusting the distance between the two rollers when dealing with fabrics 50 of different thicknesses, and also expands the application range of rolls 102 of different thicknesses.

[0039] In some embodiments, such as Figure 5As shown, the coil support rack includes two parallel coil support rods 108 fixed to the coil support bracket 101. Each coil support rod 108 has a sliding groove for the coil to slide. In this embodiment, the upper coil support rack has three sets of coils 102, and the lower coil support rack has three sets of coils 102, meaning each layer has two sets of spare coils 102 to facilitate timely material reception and avoid downtime affecting production. Each coil support rod 108 has an arc-shaped guide plate at its end, which connects to the lower wall of the sliding groove, allowing the opening of the groove to face upwards. The coil is placed into the groove from the upward-facing opening and slides along the arc-shaped guide plate. The arc-shaped guide plate both guides the coil and prevents it from falling.

[0040] In some embodiments, such as Figure 3 and Figure 4 As shown, the double-layer buffer mechanism for the roll material includes a buffer bracket and a buffer assembly arranged vertically on the buffer bracket. The buffer assembly includes two rows of guide rollers 201 rotatably connected to the buffer bracket. The two rows of guide rollers 201 are staggered, and the fabric 50 passes over each guide roller 201 sequentially from bottom to top. The guide rollers 201 of the buffer assembly help to stretch the roof roll material (material: knitted fabric + sponge) and ensure the sponge's resilience, thereby improving the overall quality of the vehicle roof product.

[0041] The buffer support includes two sets of parallel support frames 205, a bottom crossbeam 207 connected to the bottom of the two support frames 205, and a top crossbeam 211 connected to the top of the support frames 205. The two ends of each guide roller 201 are rotatably connected to the two sets of parallel support frames 205. Specifically, the buffer support as a whole is also a frame structure, providing reliable support for the cushioning of the fabric 50. The frame structure can be welded from angle steel, I-beams, square steel pipes, etc., making the structure simple and convenient, and also facilitating the arrangement of each guide roller 201.

[0042] To facilitate the installation and disassembly of each guide roller 201, grooves for the rotational engagement of the guide roller 201 are provided on each common frame 206 and each adjusting rod, and pressure plates 214 are provided on the grooves for fastening with bolts. When it is necessary to replace the guide roller 201, the bolts are loosened, the pressure plates 214 are removed, and the guide roller 201 can be taken out. The operation is simple and convenient.

[0043] In some embodiments, such as Figure 3 and Figure 4As shown, the double-layer buffer mechanism for rolled fabric also includes two shared frames 206 symmetrically fixed on the buffer support and two pairs of bidirectional linear drive slide rails 202. A pair of upper adjusting rods 203 and a pair of lower adjusting rods 208 are slidably connected to the bidirectional linear drive slide rails 202. In the upper and lower buffer components, the lower guide rollers 201 of the upper buffer component and the upper guide rollers 201 of the lower buffer component are rotatably connected to the shared frame 206. At the same time, the two ends of the upper guide rollers 201 of the upper buffer component are rotatably connected to the two opposite upper adjusting rods 203, respectively. The two ends of the lower guide rollers 201 of the lower buffer component are rotatably connected to the two opposite lower adjusting rods 208, respectively. The bidirectional linear drive slide rails 202 drive the upper adjusting rods 203 and the lower adjusting rods 208 to rise and fall, adjusting the tension of the fabric 50 stored in each buffer component.

[0044] Among them, the bidirectional linear drive slide rail 202 adopts a servo motor to drive the linear guide rail in conjunction with the ball screw. The two ends of the linear guide rail are respectively equipped with servo motors. The upper adjustment rod 203 and the lower adjustment rod 208 are respectively connected to the ball screw through sliders. They can simultaneously drive the upper adjustment rod 203 and the lower adjustment rod 208 to move in opposite directions or in the opposite direction to adjust the tension of the fabric 50.

[0045] The bidirectional linear drive slide rail 202 is designed so that the upper and lower guide rollers 201 of each layer of buffer components have the function of vertical extension and retraction. They are stretched during normal production and contracted when changing the fabric 50, so as to meet the requirement of continuous material supply without stopping the machine when changing the fabric 50.

[0046] Optionally, such as Figure 3 and Figure 4 As shown, an upper reinforcing rod 204 and a lower reinforcing rod 209 are respectively provided between the two bidirectional linear drive slide rails 202 on the same side. The upper reinforcing rod 204 and the lower reinforcing rod 209 strengthen the bidirectional linear drive slide rail 202 and improve the stability of the up-and-down adjustment when the fabric 50 is stretched.

[0047] like Figure 3 and Figure 4 As shown, a frame reinforcing rod 210 is also provided in the middle of the support frame 205 to improve the support strength of the support frame 205.

[0048] like Figure 3 and Figure 4 As shown, a transverse connecting rod 213 is also provided between the common frame 206 and the frame reinforcing rod 210 to enhance the support strength of the fabric 50. Multiple vertical reinforcing rods 212 are also provided on the common frame 206 to enhance the support strength of the common frame 206, thereby ensuring the support strength of the fabric 50.

[0049] In some embodiments, such as Figures 6 to 8As shown, the roll cutting mechanism 40 includes a cutting bracket 404, a cutting component disposed at the front end of the cutting bracket 404, and a fabric conveying component corresponding to each layer of fabric. One of the fabric conveying components is mounted on the cutting bracket 404 via a lifting drive component, and the cutting component is located in front of the fabric conveying component (e.g., ...). Figure 7 The location indicated by 410 is the installation position of the cutting component. By using the lifting drive component, the space of the cutting mechanism can be fully utilized to form a height difference, realizing the continuous cross-feeding and cutting action of material A and material B. This meets the simultaneous continuous production of two overhead production lines in the subsequent process, saving space and improving production efficiency.

[0050] In this embodiment, the cutting assembly includes cutting shears and a linear slide that drives the cutting shears to reciprocate. The linear slide drives the pneumatic shears to move along the width of the fabric 50 from one end to the other, thereby cutting the fabric 50. The cutting shears or flying shears are pneumatic or electric shears. It should be noted that the cutting assembly can be implemented using existing fabric cutting structures, which are not shown in the accompanying drawings. Alternatively, the cutting assembly uses a rotating blade (circular disc) that rotates and moves simultaneously to cut the fabric.

[0051] by Figure 1 , Figures 6 to 8 For example, the front fabric conveying component, positioned at a higher position, pulls the upper layer A material forward for cutting; the rear fabric conveying component pulls the lower layer B material forward for cutting. The front fabric conveying component can move up and down along the guide rod via a lifting drive component to avoid cutting the lower layer B material. The rear fabric conveying component can move back and forth along the front-to-back sliding rail on the cutting bracket. When cutting the lower layer B material, the front-to-back sliding rail 409 drives the rear fabric conveying component forward, while the front fabric conveying component rises to avoid the space for the lower layer B material to be fed forward. The rear fabric conveying component and the front fabric conveying component form a front-to-back contact, pulling the lower layer B material forward to be conveyed close to the front cutting scissors for cutting, ensuring the flatness of the fabric during cutting. In this way, when the upper and lower layers of fabric are in the buffer or not being conveyed forward, they are each held separately by the fabric conveying components. Once one of the fabrics needs to be cut and fed forward, the corresponding fabric conveying, lifting and forward and backward movement components will move to achieve the cutting and feeding of the corresponding fabric. The two layers of fabric are switched alternately for cutting and feeding. One feeding device can supply two ceiling production lines for continuous non-stop production, which greatly improves the production efficiency.

[0052] The lifting drive assembly adopts a screw and nut lifting method, which can be achieved by hydraulic lifting or cylinder lifting. The four corners of the lifting base plate 408 are connected to four guide rods 403, which are fixed to the cutting bracket 404. The cutting assembly and the fabric transmission assembly are both fixed to the lifting base plate 408.

[0053] The waste bin (not shown in the figure) is set on the cutting bracket 404, that is, below the cutting component and the fabric conveying component. When the defective fabric 50 segment is cut, the fabric 50 in front can be conveyed in reverse by the reverse rotation of the fabric conveying component and fall into the waste bin below.

[0054] In some embodiments, such as Figures 6 to 8 As shown, the fabric conveying assembly includes a fabric drive motor 402, a horizontal base plate 405, and a fabric drive roller 407 and a fabric driven roller 406 disposed on the upper and lower sides of the horizontal base plate 405. The fabric drive roller 407 is driven by the fabric drive motor 402. An elongated hole is provided on the horizontal base plate 405 directly opposite the fabric drive roller 407 and the fabric driven roller 406. The fabric conveying assembly has the same structure and principle as the fabric front-drive mechanism, and also includes a cutting lifting slide 401 for adjusting the height of the fabric driven roller 406. The fabric 50 moves forward flat along the horizontal base plate 405, and the cutting shears move along the edge of the horizontal base plate 405 to cut the fabric 50 neatly and evenly.

[0055] In theory, it is possible to feed three or more layers of roll material. When feeding three or more layers of roll material is required, a three-layer roll material rack, a three-layer buffer component, and three sets of cutting components are set up accordingly.

[0056] The dual-roll feeding device provided in this embodiment of the invention, in combination with the entire device, has the following characteristics:

[0057] (1) The roll material front driver, roll end welding, automatic buffer storage, automatic detection instrument, automatic conveying of A material and B material, and automatic cutting function are integrated into one design, and the overall structure is precise.

[0058] (2) The dual roll feeding device provided by the present invention utilizes a buffer mechanism and a roll welding mechanism to achieve the production process of changing fabrics without causing machine downtime, thereby improving the production efficiency of two ceiling production lines at the same time.

[0059] (3) When defects appear in the roll material, the detector can automatically detect and accurately cut and recycle the waste.

[0060] (4) This device realizes the automated application of one fabric roller glue line corresponding to two ceiling production lines to produce at the same time, replacing the manual feeding method, saving feeding time and improving production efficiency.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for switching and feeding dual-roll automotive headliner fabric, characterized in that, include: The roll double-layer material rack (10), roll double-layer buffer mechanism (20), fabric detector (30) and roll cutting mechanism (40) are arranged sequentially from back to front. The double-layer roll material rack (10) includes a roll material support (101) and at least two layers of roll material racks arranged vertically, with a fabric front-drive mechanism provided at the front end of each layer of roll material rack. The double-layer buffer mechanism for roll material includes a buffer support and a buffer component arranged vertically on the buffer support. The buffer component includes two rows of guide rollers (201) rotatably connected to the buffer support. The two rows of guide rollers (201) are staggered. The fabric (50) passes around each guide roller (201) from bottom to top. Each fabric front drive mechanism selects one, or sequentially, or simultaneously to convey the fabric (50) forward. Different layers of roll material are driven by their respective front fabric front drive mechanisms, buffered by the double-layer buffer mechanism for roll material, and after being inspected for defects by the fabric detector (30), they are sent to the front roll material cutting mechanism (40) for cutting according to the preset length of each layer of fabric (50). When the fabric detector issues an alarm signal, the device receives the signal indicating fabric defects. The meter counter corresponding to material A or material B in the cutting area calculates the current size and feeds it back to the PLC module of the overhead production line. If the fabric length matches the product size, the first step is to cut the qualified fabric, and the second step is to advance the fabric and cut the defective parts again. The PLC module automatically calculates and controls this process. If the fabric length does not match the product size, the first step is to cut the defective fabric directly, and the conveyor belt of the corresponding fabric transport component reverses, causing the defective fabric to fall into the waste bin below. The second step is to transport and cut the qualified fabric normally, and the PLC module automatically controls this process. The roll cutting mechanism (40) includes a cutting bracket (404), a cutting component disposed at the front end of the cutting bracket (404), and a fabric transfer component corresponding to each layer of fabric. One of the fabric transfer components is mounted on the cutting bracket (404) via a lifting drive component, and the cutting component is located in front of the fabric transfer component. The lifting drive assembly can make full use of the space of the cutting mechanism to form a height difference, realize the continuous cross conveying and cutting action of material A and material B, and meet the simultaneous continuous production of two canopy production lines in the subsequent process. The front fabric conveying component, positioned at a higher position, pulls the upper layer A material forward to cut the A material; the rear fabric conveying component pulls the lower layer B material forward to cut the B material. The front fabric conveying component can move up and down along the guide rod (403) via a lifting drive component to avoid cutting the lower layer B material; the rear fabric conveying component can move back and forth along the front and rear moving slide rail on the cutting bracket (404). When the lower layer B material is being cut, the front and rear moving slide rail (409) drives the rear fabric conveying component to move forward, and the front fabric conveying component rises to avoid the space for the lower layer B material to be fed forward. The rear fabric conveying component and the front fabric conveying component form a front-to-back contact, pulling the lower layer B material forward to be conveyed to the cutting scissors in front for cutting.

2. The automotive roof double-roll fabric switching and feeding device as described in claim 1, characterized in that, The double-layer roll material rack (10) also includes a welding mechanism (106) corresponding to the front of each roll material rack. The welding mechanism (106) is fixed on the roll material support (101). When the front end of the roll material is at the tail end, the front end of the spare roll material and the tail end of the front end of the roll material (102) material (50) are bonded together at the welding mechanism (106).

3. The automotive roof double-roll material switching and feeding device as described in claim 2, characterized in that, The welding mechanism (106) includes a frame and heating wires arranged inside the frame.

4. The automotive roof double-roll material switching and feeding device as described in claim 1, characterized in that, The fabric front drive mechanism includes a fabric front drive motor (107), a front drive active roller (105), and a front drive driven roller (104); the fabric front drive motor (107) is fixed on the roll support (101), the front drive active roller (105) and the front drive driven roller (104) are both rotatably mounted on the roll support (101), and the front drive active roller (105) is drivenly connected to the fabric front drive motor (107).

5. The automotive roof double-roll material switching and feeding device as described in claim 4, characterized in that, The fabric front drive mechanism also includes a driven roller lifting slide (103), which is fixed on the roll support (101) to adjust the distance between the front drive driven roller (104) and the front drive active roller (105).

6. The automotive roof double-roll material switching and feeding device as described in claim 1, characterized in that, The coil support frame includes two coil support rods (108) that are fixed in parallel to the coil support frame (101), and the coil support rods (108) are provided with sliding grooves for the coil to slide.

7. The automotive roof double-roll material switching and feeding device as described in claim 1, characterized in that, The double-layer buffer mechanism for the roll material also includes two shared frames (206) symmetrically fixed on the buffer support and two pairs of bidirectional linear drive slide rails (202). A pair of upper adjusting rods (203) and a pair of lower adjusting rods (208) are slidably connected on the bidirectional linear drive slide rails (202). In the upper and lower buffer components, the lower guide rollers (201) of the upper buffer component and the upper guide rollers (201) of the lower buffer component are rotatably connected to the shared frame (206). At the same time, the two ends of the upper guide rollers (201) of the upper buffer component are rotatably connected to the two opposite upper adjusting rods (203). The two ends of the lower guide rollers (201) of the lower buffer component are rotatably connected to the two opposite lower adjusting rods (208). The bidirectional linear drive slide rails (202) drive the upper adjusting rods (203) and the lower adjusting rods (208) to rise and fall, adjusting the tension of the fabric (50) stored in each buffer component.

8. The automotive roof double-roll material switching and feeding device as described in claim 1, characterized in that, The fabric conveying assembly includes a fabric drive motor (402), a horizontal base plate (405), and a fabric drive roller (407) and a fabric driven roller (406) disposed on the upper and lower sides of the horizontal base plate (405). The fabric drive roller (407) is driven and connected to the fabric drive motor (402). The horizontal base plate (405) is provided with an elongated hole at the position opposite to the fabric drive roller (407) and the fabric driven roller (406).

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