A gripping system for flexible sheet material and its use

Abstract

The present application relates to a kind of grabbing system for flexible sheet and its application, including grabbing frame, two grabbing conveyors, grabbing roller and swing assembly, the first side of the grabbing frame has with industrial robot interface, and the second side is free;Two grabbing conveyors are symmetrically arranged on the two sides of grabbing frame, respectively by independent motor drive, and the spacing between two conveyors gradually increases from the top side to the bottom side of grabbing frame, forms open mouth conical layout;Grabbing roller is arranged between two conveyors and is driven by third motor, its peripheral surface is equipped with two opposite rotation external thread structures, and the upper end surface of grabbing roller is higher than the upper end surface of conveyor;Swing assembly drives two conveyors to expand or shrink.When grabbing, use height difference to make flexible sheet contact roller surface and carry out pre-expansion, then pass through linear velocity difference and apply longitudinal tension, cooperate with the external thread structure of opposite rotation and realize the expansion of flexible sheet and grab, effectively eliminate wrinkle.

Description

Technical Field

[0001] This invention relates to the field of flexible sheet processing, and particularly to a gripping system for flexible sheets, as well as an application of the aforementioned gripping system for flexible sheets. Background Technology

[0002] The tanning process involves several chemical and mechanical stages designed to transform animal soft materials into products with physical and mechanical properties that make them suitable for use in many fields, including the manufacture of clothing, footwear, and furniture.

[0003] The tanning process consists of two main stages. In the first stage, the flexible material is treated with aqueous solutions of various chemical products and subjected to various types of mechanical manipulation. In the second stage, chemical, mechanical, or combined finishing treatments are applied to the dried flexible material, the purpose of which is primarily to improve or modify its appearance or feel. Prior to finishing, the flexible material is dehydrated to facilitate drying and to eliminate any unpleasant odors produced during the chemical tanning stage. Many stages of the tanning process are still performed manually, requiring significant labor intensity and manpower.

[0004] In response to the above phenomena, the process and apparatus for the automatic processing of flexible layered materials mentioned in patent CN202380026086.2 can generally automate the basic processing stage of flexible materials, and in particular the basic processing stage of animal flexible materials in the tanning process, with the following two advantages: reduced productivity and safety and health risks to operators, fewer errors in the positioning stage of flexible materials compared with a completely manual process, and no change in the preservation of the materials to be processed due to the processing and transportation process.

[0005] In the aforementioned patent, picking up individual flexible materials from the pick-up point and placing them on the transport unit requires the cooperation of an industrial robot and a tool. This tool utilizes a frame, rollers, a web, and actuators. This structure has the following drawbacks: First, when gripping the flexible material at the pick-up point, the material is not always completely flat; it may be wrinkled. This results in the web also gripping the wrinkled material, which the patented web lacks the function of flattening the material, leading to the direct transport of wrinkled material to the next process, impacting subsequent production. Second, when using the aforementioned tool to grip and transfer the flexible material, the tool's shape limits the amount of material laid on it. The flexible materials used in the process are often in an inverted V-shape, while the subsequent processes often require flat flexible materials. This necessitates the addition of an intermediate conveyor platform (deposition surface) between the tool and the production equipment of the subsequent process to flatten the flexible material. The conveyor platform then transports the flattened flexible material to the production equipment of the subsequent process. This results in a relatively long production line, especially when there are many instances of automatic gripping using this tool in the entire production line. Consequently, the number of intermediate conveyor platforms required will also be greater, making the entire production line even longer and placing higher demands on the length of the enterprise's factory. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a flexible sheet gripping and conveying system for flexible sheets that can flatten the flexible sheet after gripping, and its application.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is: a gripping system for flexible sheets, the innovation of which is: comprising: The gripping frame has a first side and a second side that are relatively distributed. The first side is used to dock with an industrial robot, and the second side is a free side. Two gripping conveyor belts, namely a first conveyor belt and a second conveyor belt symmetrically arranged on both sides of the gripping frame, are driven by an independent first motor and a second motor respectively. The distance between the first conveyor belt and the second conveyor belt gradually increases from the top side of the gripping frame to the bottom side of the gripping frame, forming an open conical layout. The gripping roller is located on the top side of the gripping frame and is driven by a third motor. It has two external thread structures with opposite directions of rotation on both sides. The gripping roller is located between the first conveyor belt and the second conveyor belt, and the height of the upper end face of the gripping roller is higher than the height of the upper end faces of the first conveyor belt and the second conveyor belt. The oscillating assembly is used to drive the first conveyor belt and the second conveyor belt away from the gripping roller to move closer or further apart, thereby enabling the first conveyor belt and the second conveyor belt to expand or contract. During gripping, the gripping system utilizes the height difference between the gripping roller and the conveyor belt to allow the flexible sheet to preferentially contact the gripping roller surface for pre-flattening, and then be received by the conveyor belt. Subsequently, by setting the linear speeds of the first conveyor belt, the gripping roller, and the second conveyor belt to increase or decrease, the speed difference applies longitudinal tension to the flexible sheet, and the external thread structure of the gripping roller with opposite rotation direction achieves the flattening and gripping of the flexible sheet.

[0008] Furthermore, the middle part of the gripping roller is a smooth rod section, and the two sides of the smooth rod section are threaded sections with external thread structures on their surfaces, and the external thread structures on the two threaded sections have opposite directions of rotation.

[0009] Furthermore, the first conveyor belt is mounted on a first support, the second conveyor belt is mounted on a second support, and the first and second supports are hinged to the gripping frame on the side near the gripping roller. The first and second supports are driven to swing by a swing assembly to realize the expansion or contraction of the first and second conveyor belts.

[0010] Furthermore, the swing assembly includes a first electric push rod and a second electric push rod. The housing of the first electric push rod is hinged to the gripping frame, and the push rod of the first electric push rod is hinged to the first bracket. The housing of the second electric push rod is hinged to the gripping frame, and the push rod of the second electric push rod is hinged to the second bracket. The first bracket and the second bracket are driven to swing by the movement of the first electric push rod and the second electric push rod.

[0011] Furthermore, the swing assembly includes a swing motor, a first gear, a second gear, and a third gear. The two sides of the first bracket are hinged to the gripping frame through a pair of first hinge shafts. The first gear is mounted on the first hinge shaft. The two sides of the second bracket are hinged to the gripping frame through a pair of second hinge shafts. The second gear is mounted on the second hinge shaft and meshes with the first gear through a pair of third gears. One of the third gears is mounted on the output shaft of the swing motor. The swing motor drives the third gear to rotate and cooperate with the first and second gears to drive the first and second brackets to swing simultaneously.

[0012] Furthermore, both the first and second conveyor belts consist of two parallel belts with a gap between them.

[0013] Furthermore, a counterweight assembly is provided near the first side of the gripping frame. The counterweight assembly includes a counterweight bracket and at least one counterweight block fixed thereto by bolts.

[0014] An innovative application of a gripping system for flexible sheets is described in that the gripping system is positioned between a conveying platform and a receiving platform to grip the flexible sheet being conveyed from the conveying platform to the receiving platform and to directly deliver the gripped flexible sheet to subsequent processing equipment.

[0015] Furthermore, the receiving platform includes a receiving bracket, a receiving seat, and a rotating roller. The bottom end of the receiving bracket is equipped with a moving roller that drives the entire receiving platform to move horizontally. The receiving seat moves up and down along the receiving bracket under the combined drive of a lifting screw and a fourth motor. The rotating roller is set on the receiving seat and is driven by a fifth motor. The rotating roller also has two external thread structures with opposite directions of rotation on both sides.

[0016] The beneficial effects of the present invention are as follows: The gripping system of the present invention uses two tapered conveyor belts and gripping rollers to grip the flexible sheet material. The longitudinal tension of the flexible sheet material is applied by the speed difference. With the help of the opposite spiral threads on the gripping rollers, the flexible sheet material is stably gripped and flatly transported, effectively eliminating wrinkles in the flexible sheet material.

[0017] Furthermore, regarding the unfolding or retraction of the first and second conveyor belts, the retracted state facilitates the gripping frame to grab the flexible sheet from the previous process, while the unfolded state enables the flexible sheet to be conveyed horizontally or nearly horizontally. Based on this design, when the gripping system of the present invention is subsequently applied to the production line of flexible sheet, it can be directly connected to the processing equipment or storage racks of the subsequent process, without the need for an intermediate conveyor platform to flatten the flexible sheet, effectively shortening the length of the production line.

[0018] The design of the counterweight component uses a combination of counterweight blocks and counterweight brackets. The counterweight blocks increase the weight of the gripping frame on the first side, thereby bringing the center of gravity of the gripping frame closer to the industrial robot. This reduces the load requirements of the industrial robot, thus lowering costs and avoiding the problem of excessive inertia caused by the center of gravity being far away. This makes the industrial robot more effortless and smoother when accelerating and decelerating, avoiding adverse phenomena such as sluggish movements, overshoot, or vibration. Attached Figure Description

[0019] Figure 1This is a schematic diagram illustrating the interaction between the gripping system for flexible sheets of the present invention and an industrial robot.

[0020] Figure 2 This is a schematic diagram of the gripping system for flexible sheets according to the present invention.

[0021] Figure 3 This is a formal drawing of the gripping system for flexible sheets according to the present invention.

[0022] Figure 4 This is a schematic diagram of the first structure of the swing component in this invention.

[0023] Figure 5 This is a schematic diagram of the first deployed state of the swing component of the first structure in this invention.

[0024] Figure 6 This is a schematic diagram of the second unfolded state of the swing component of the first structure in this invention.

[0025] Figure 7 This is a schematic diagram of the second structure of the swing component in this invention.

[0026] Figure 8 This is a schematic diagram of the unfolded state of the swing component of the second structure in this invention.

[0027] Figure 9 This is a schematic diagram of the flattened state of the gripping conveyor belt in this invention.

[0028] Figure 10 This is a schematic diagram illustrating the application of the gripping system for flexible sheets in this invention.

[0029] Figure 11 This is a side view of the application of the gripping system for flexible sheets in this invention. Detailed Implementation

[0030] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0031] like Figures 1-9 A gripping system for flexible sheets is shown, comprising: The gripping frame 1 has a first side and a second side that are relatively distributed. The first side of the gripping frame 1 is used to dock with the industrial robot 2. A flange 11 for docking with the industrial robot 2 is provided on the first side of the gripping frame 1. The second side of the gripping frame 1 is a free side.

[0032] Two gripping conveyor belts, namely the first conveyor belt 3 and the second conveyor belt 4, are symmetrically arranged on both sides of the gripping frame 1. The first conveyor belt 3 and the second conveyor belt 4 are driven by independent first motor 31 and second motor 41, respectively. The distance between the first conveyor belt 3 and the second conveyor belt 4 gradually increases from the top side of the gripping frame 1 to the bottom side of the gripping frame 1, forming an open conical layout.

[0033] In this embodiment, both the first conveyor belt 3 and the two second conveyor belts 4 are composed of two parallel belt bodies with a gap between them. The design of two belt bodies for both the first conveyor belt 3 and the second conveyor belt 4, with a gap between them, protects the most vulnerable central area of ​​the flexible sheet. Simultaneously, multi-point clamping enhances edge control and improves support for the flexible sheet.

[0034] Specifically, the first conveyor belt 3 is mounted on a first support, and the second conveyor belt 4 is mounted on a second support. A conveying roller 6 is respectively installed on both sides of the first and second supports to drive the first conveyor belt 3 or the second conveyor belt 4 to rotate. The side of the first and second supports closest to the gripping roller is hinged to the gripping frame, and the first and second supports swing under the drive of a swinging component, causing the sides of the first and second conveyor belts 3 and 4 away from the gripping roller 5 to move closer or further apart, thus realizing the unfolding or retraction of the first and second conveyor belts 3 and 4. Regarding the unfolding or retraction of the first and second conveyor belts 3 and 4, in the retracted state, it facilitates the gripping frame to grip the flexible sheet from the previous process; in the unfolded state, it enables the flexible sheet to be conveyed horizontally or nearly horizontally. Figure 9 As shown, based on this design, when the gripping system of the present invention is applied to the production line of flexible sheet material, it can be directly connected to the processing equipment of the subsequent process or the stacking stool for storage, without the need for an intermediate conveyor platform to flatten the flexible sheet material, thus effectively shortening the length of the production line.

[0035] like Figure 4 As shown, the first structure of the swing assembly is as follows: the swing assembly includes a first electric push rod 32 and a second electric push rod 42. The outer shell of the first electric push rod 32 is hinged to the gripping frame 1, and the push rod of the first electric push rod 32 is hinged to the first bracket. The outer shell of the second electric push rod 42 is hinged to the gripping frame 1, and the push rod of the second electric push rod 42 is hinged to the second bracket. The first bracket and the second bracket are driven to swing by the movement of the first electric push rod 32 and the second electric push rod 42, so as to realize the expansion or contraction of the first conveyor belt 3 and the second conveyor belt 4.

[0036] like Figure 7As shown, the second structure of the swing assembly is as follows: The swing assembly includes a swing motor, a first gear 33, a second gear 43, and a third gear 34. The two sides of the first bracket are hinged to the gripping frame 1 through a pair of first hinge shafts. The first gear 33 is mounted on the first hinge shaft. The two sides of the second bracket are hinged to the gripping frame 1 through a pair of second hinge shafts. The second gear 43 is mounted on the second hinge shaft and meshes with the first gear 33 through a pair of third gears 34. Of the two third gears 34, one third gear 34 is directly mounted on the gripping frame 1 through a connecting shaft and bearing, and the other third gear 34 is mounted on the output shaft of the swing motor. The swing motor drives the third gear 34 to rotate and cooperate with the first gear 33 and the second gear 43 to drive the first bracket and the second bracket to swing simultaneously, so as to realize the simultaneous unfolding or retraction of the first conveyor belt 3 and the second conveyor belt 4.

[0037] In this invention, two different structures are used for the swing assembly. In the first structure, either the first conveyor belt 3 or the second conveyor belt 4 can be individually extended outwards under the drive of the first electric push rod 32 or the second electric push rod 42, such as... Figure 5 As shown, it can also unfold outwards simultaneously under the combined drive of the first electric push rod 32 and the second electric push rod 42, as... Figure 6 As shown; however, when the second structure is adopted, the first conveyor belt 3 and the second conveyor belt 4 will simultaneously unfold outwards under the meshing action of the various gears, as shown. Figure 8 As shown; in practical applications, the corresponding swing components can be selected and installed according to different working conditions.

[0038] The gripping roller 5 is located on the top side of the gripping frame 1. Both sides of the gripping roller 5 are mounted on the gripping frame 1 through bearings. The gripping roller 5 is driven to rotate by the third motor 54. There are two external thread structures 53 with opposite directions of rotation on both sides of the gripping roller 5. The gripping roller 5 is located between the first conveyor belt 3 and the second conveyor belt 4, and the height of the upper end face of the gripping roller 5 is higher than the height of the upper end faces of the first conveyor belt 3 and the second conveyor belt 4.

[0039] Specifically, the gripping roller 5 has a smooth, bare section 51 at its center, with threaded sections 52 on either side of the bare section 51, each with an external thread structure 53. The external threads 53 on the two threaded sections 52 have opposite directions of rotation. The gripping roller 5 uses a combination of the bare section 51 and the threaded sections 52. The bare section 51 protects the central area of ​​the flexible sheet, preventing it from being squeezed and indented. Furthermore, the central area of ​​the flexible sheet resting on the bare section 51 is not subjected to lateral tension from the threads, ensuring that the flexible sheet does not twist during gripping. The external thread structure 53 on the threaded sections 52 pushes the flexible sheet to both sides to flatten it.

[0040] In this embodiment, the design of the external thread structure 53 on the gripping roller 5 can be achieved by directly machining the thread on the outer wall of the threaded section 52. In this design, the diameter of the threaded section 52 needs to be larger than the diameter of the smooth rod section 51 to ensure that the machined external thread structure 53 protrudes from the smooth rod section 51. Alternatively, the external thread structure 53 can be formed by winding steel wire around the outer wall of the threaded section 52. In this design, the diameter of the threaded section 52 can be the same as the diameter of the smooth rod section 51.

[0041] A counterweight assembly is also provided near the first side of the gripping frame 1. The counterweight assembly includes a counterweight bracket and at least one counterweight block fixed to it by bolts. The design of the counterweight assembly uses the cooperation of the counterweight block and the counterweight bracket to increase the weight of the gripping frame at the first side, thereby bringing the center of gravity of the gripping frame closer to the industrial robot. This reduces the load requirements of the industrial robot, thus reducing costs and avoiding the problem of excessive inertia due to the center of gravity being far away. This makes the industrial robot more effortless and smoother when accelerating and decelerating, avoiding adverse phenomena such as sluggish movements, overshoot, or vibration.

[0042] In this embodiment, the first motor 31, the second motor 41 and the third motor 54 are all installed on the first side of the gripping frame 1. With this design, the three motors can be used directly to replace the counterweight, which can also achieve the purpose of changing the center of gravity of the gripping frame, thus eliminating the need to install the counterweight.

[0043] During gripping, the gripping system utilizes the height difference between the gripping roller 5 and the first conveyor belt 3 and the second conveyor belt 4 to allow the flexible sheet to preferentially contact the roller surface of the gripping roller 5 for pre-flattening. Then, the first conveyor belt 3 and the second conveyor belt 4 receive it. Subsequently, by setting the linear speeds of the first conveyor belt 3, the gripping roller 5 and the second conveyor belt 4 to increase or decrease, the speed difference applies longitudinal tension to the flexible sheet. This, combined with the opposite rotation direction of the external thread structure 53 of the gripping roller 5, achieves the flattening and gripping of the flexible sheet.

[0044] When controlling the linear speed, if the flexible sheet moves from the first conveyor belt 3 to the second conveyor belt 4, the linear speeds of the first conveyor belt 3, the gripping roller 5, and the second conveyor belt 4 are set to increase sequentially. In this case, the gripping roller 5 is considered to rotate clockwise, and the external thread structure 53 on the gripping roller 5 near the first side is set to be left-handed, while the external thread structure 53 near the second side is set to be right-handed. If the flexible sheet moves from the second conveyor belt 4 to the first conveyor belt 3, the linear speeds of the first conveyor belt 3, the gripping roller 5, and the second conveyor belt 4 are set to decrease sequentially. In this case, the gripping roller 5 is considered to rotate counterclockwise, and the external thread structure 53 on the gripping roller 5 near the first side is set to be right-handed, while the external thread structure 53 near the second side is set to be left-handed.

[0045] An application of a gripping system for flexible sheets, such as Figures 10-11 As shown, the grabbing system is set between a conveying platform 8 and a receiving platform.

[0046] The receiving platform includes a receiving bracket 9, a receiving seat 92, and a rotating roller 91. The receiving bracket 9 is an L-shaped bracket structure formed by connecting a horizontally set bottom bracket and a vertically set side bracket. Four movable rollers 93 are installed at the bottom end of the bottom bracket of the receiving bracket 9, and the movable rollers 93 are driven to rotate by a sixth motor 96 installed on the bottom bracket, which drives the entire receiving platform to move horizontally.

[0047] The receiving seat 92 moves up and down along the side support of the receiving bracket 9 under the combined drive of a lifting screw 94 and a fourth motor 95. Specifically, the upper and lower sides of the lifting screw 94 are mounted on the side support through the cooperation of bearings and bearing seats. On the side support, a vertically arranged lifting guide rail 97 is also provided on both sides of the lifting screw 94. The side of the receiving seat 92 is also provided with a screw nut that cooperates with the lifting screw 94 and a lifting slider that cooperates with the lifting guide rail 97. The lifting screw 94 is driven to rotate by the fourth motor 95 installed at the top of the side support, thereby driving the receiving seat 92 to move up and down along the lifting guide rail 97.

[0048] The rotating roller 91 is mounted on the receiving seat 92 on both sides via bearings and bearing housings. The rotating roller 91 is driven to rotate by a fifth motor mounted on the receiving seat 92. The rotating roller 91 also has two external thread structures with opposite directions of rotation on both sides, and the middle part of the rotating roller 91 is a smooth, bare rod structure. The structural design of the rotating roller 91 is the same as that of the gripping roller 5, both designed to flatten the flexible sheet material during transport.

[0049] The gripping system is positioned between the conveying platform 8 and the receiving platform. During operation, when the flexible sheet is being conveyed from the conveying platform 8 to the receiving platform, the gripping system directly grips the flexible sheet and delivers it directly to the downstream processing equipment. In this application, it is no longer necessary to stack the flexible sheet conveyed from the conveying platform 8 through the receiving platform. The gripping system of this invention, with the assistance of the industrial robot 2, can directly grip the stacked flexible sheet and deliver it to the downstream processing equipment. The unfolding of the first conveyor belt 3 and the second conveyor belt 4 forms a platform for planar transport of the flexible sheet, directly delivering the flexible sheet to the downstream processing equipment for processing. This eliminates the need for intermediate stacking and planar transport platforms, significantly shortening the production line.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A gripping system for flexible sheets, characterized in that: include The gripping frame has a first side and a second side that are relatively distributed. The first side is used to dock with an industrial robot, and the second side is a free side. Two gripping conveyor belts, namely a first conveyor belt and a second conveyor belt symmetrically arranged on both sides of the gripping frame, are driven by an independent first motor and a second motor respectively. The distance between the first conveyor belt and the second conveyor belt gradually increases from the top side of the gripping frame to the bottom side of the gripping frame, forming an open conical layout. The gripping roller is located on the top side of the gripping frame and is driven by a third motor. It has two external thread structures with opposite directions of rotation on both sides. The gripping roller is located between the first conveyor belt and the second conveyor belt, and the height of the upper end face of the gripping roller is higher than the height of the upper end faces of the first conveyor belt and the second conveyor belt. The oscillating assembly is used to drive the first conveyor belt and the second conveyor belt away from the gripping roller to move closer or further apart, thereby enabling the first conveyor belt and the second conveyor belt to expand or contract. During gripping, the gripping system utilizes the height difference between the gripping roller and the conveyor belt to allow the flexible sheet to preferentially contact the gripping roller surface for pre-flattening, and then be received by the conveyor belt. Subsequently, by setting the linear speeds of the first conveyor belt, the gripping roller, and the second conveyor belt to increase or decrease, the speed difference applies longitudinal tension to the flexible sheet, and the external thread structure of the gripping roller with opposite rotation direction achieves the flattening and gripping of the flexible sheet.

2. The gripping system for flexible sheets according to claim 1, characterized in that: The gripping roller has a smooth, bare section at its center, and two threaded sections with external threads on their surfaces on either side of the bare section, with the external threads on the two threaded sections rotating in opposite directions.

3. The gripping system for flexible sheets according to claim 1, characterized in that: The first conveyor belt is mounted on a first support, and the second conveyor belt is mounted on a second support. The first and second supports are hinged to the gripping frame on the side near the gripping roller. The first and second supports are driven to swing by a swing assembly to realize the expansion or contraction of the first and second conveyor belts.

4. The gripping system for flexible sheets according to claim 3, characterized in that: The swing assembly includes a first electric push rod and a second electric push rod. The housing of the first electric push rod is hinged to the gripping frame, and the push rod of the first electric push rod is hinged to the first bracket. The housing of the second electric push rod is hinged to the gripping frame, and the push rod of the second electric push rod is hinged to the second bracket. The first bracket and the second bracket are driven to swing by the movement of the first electric push rod and the second electric push rod.

5. The gripping system for flexible sheets according to claim 3, characterized in that: The swing assembly includes a swing motor, a first gear, a second gear, and a third gear. The two sides of the first bracket are hinged to the gripping frame through a pair of first hinge shafts. The first gear is mounted on the first hinge shaft. The two sides of the second bracket are hinged to the gripping frame through a pair of second hinge shafts. The second gear is mounted on the second hinge shaft and meshes with the first gear through a pair of third gears. One of the third gears is mounted on the output shaft of the swing motor. The swing motor drives the third gear to rotate and cooperate with the first and second gears to drive the first and second brackets to swing simultaneously.

6. The gripping system for flexible sheets according to claim 1, characterized in that: Both the first and second conveyor belts consist of two parallel belts with a gap between them.

7. The gripping system for flexible sheets according to claim 1, characterized in that: The gripping frame is also provided with a counterweight assembly near the first side. The counterweight assembly includes a counterweight bracket and at least one counterweight block fixed thereto by bolts.

8. An application of the gripping system for flexible sheets according to any one of claims 1-7, characterized in that: The gripping system is set between a conveying platform and a receiving platform to grip the flexible sheet material being transported from the conveying platform to the receiving platform and to send the gripped flexible sheet material directly to the subsequent processing equipment.

9. The application of the gripping system for flexible sheets according to claim 8, characterized in that: The receiving platform includes a receiving bracket, a receiving seat, and a rotating roller. The bottom end of the receiving bracket is equipped with a moving roller that drives the entire receiving platform to move horizontally. The receiving seat moves up and down along the receiving bracket under the combined drive of a lifting screw and a fourth motor. The rotating roller is set on the receiving seat and is driven by a fifth motor. The rotating roller also has two external thread structures with opposite directions of rotation on both sides.

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