A safe film production line film conveying device

Abstract

The application discloses a safe film production line film conveying device and relates to the technical field of film production line transportation. The device comprises a base and a vehicle body. The vehicle body is used for placing and moving the film. The film is sleeved on a steel roll core in a roll shape. Driving wheels and driven wheels are installed at the bottom end of the vehicle body. The movement of the vehicle body is protected by a protection mechanism. The protection mechanism comprises driving tracks and driven tracks. The driving tracks are arranged at the top end of the base. When the vehicle body moves forward, if the control system fails, the base moves forward, the front protection wheel contacts the front protection step and rises along the slope. At this time, the front protection wheel and the two driven wheels form three supporting points, so that the driving wheel is suspended from the driving tracks. Even if the driving wheel continues to rotate, the base will not continue to move forward. The safety protection of the movement of the base is facilitated. When the position detection system fails, the base will not rush out of the tracks, so that serious safety accidents are avoided.

Description

Technical Field

[0001] This invention relates to the field of film production line transportation technology, specifically a safe film transport device for film production lines. Background Technology

[0002] Biaxial stretching is a commonly used film production method. A biaxially stretched film production line is an assembly line composed of various equipment systems, including: a drying system, an extrusion system, a casting system, a longitudinal stretching system, a transverse stretching system, a traction roller station, and a winding station. The final produced film is wound onto a steel core, which is placed on two alternating winding arms at the winding station. The reciprocating transport of large film rolls (with a certain length of film wound on the steel core) weighing up to 2 tons from the unloading position winding arm and the transport of empty steel cores to the unloading position winding arm is completed by the film transport vehicle of the film production line. The film transport vehicle consists of one drive wheel and two driven wheels arranged in a triangular shape. During operation, the film transport vehicle moves back and forth along three tracks. The control system of this film transport vehicle is disclosed in announcement number CN108563181B.

[0003] To ensure the smooth and safe transport of large film rolls weighing up to 2 tons or empty steel cores weighing up to 1 ton, the control system is equipped with position detection systems for outward stop position, outward deceleration position, inward deceleration position, inward stop position, and vehicle body protection. However, if the position detection system malfunctions, the vehicle body will derail, causing a serious safety accident. Furthermore, for ease of handling the film, it is usually placed directly on a pallet; prolonged placement of this material makes the film susceptible to compression and wear. Summary of the Invention

[0004] The purpose of this invention is to provide a safe film conveying device for a film production line, in order to solve the problem that the vehicle body will run off the track and cause serious safety accidents when the position detection system malfunctions.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a safe film conveying device for a film production line, comprising a base and a carriage, the carriage being used for placing and moving the film, the film being wound onto a steel core, a drive wheel and a driven wheel being installed at the bottom end of the carriage, and the movement of the carriage being protected by a safety mechanism.

[0006] The protective mechanism includes a drive rail and a driven rail. The drive rail is located at the top of the base, and the driven rail is located at the top of the base and on both sides of the drive rail. The drive rail is for the drive wheel to slide, and the driven rail is for the driven wheel to slide. A front protective wheel and a rear protective wheel are respectively installed at the bottom of the vehicle body at both ends of the drive wheel. The inner cavity of the drive rail is provided with a front protective step and a rear protective step. The front protective step and the rear protective step are moved into the drive rail by a moving mechanism. The film is placed on the vehicle body by a placement mechanism.

[0007] As a further embodiment of the present invention: the moving mechanism includes a first motor, which is installed inside the base. The output end of the first motor is connected to a first lead screw. A movable frame is connected to the outer wall of the first lead screw. The movable frame is slidably connected to the inside of the base and located below the drive rail. A spur gear is rotatably connected to the top of the movable frame inside the base. A second lead screw is fixedly connected to one end of the spur gear. A connecting plate is connected to the outer wall of the second lead screw. The connecting plate is slidably connected to the inside of the base. The front protective step and the rear protective step are respectively fixedly connected to the two ends of the connecting plate.

[0008] As a further embodiment of the present invention: the placement mechanism includes a mounting base, which is fixedly connected to the top of the vehicle body. The inner wall of the mounting base has a movable groove, and a movable seat is slidably connected to the inner wall of the movable groove. A sliding plate is symmetrically slidably connected to the top of the vehicle body. A connecting rod is rotatably connected to the top of the sliding plate, and the connecting rod is rotatably connected to the movable seat. A second motor is mounted on the outer wall of the vehicle body, and the output end of the second motor is connected to a threaded rod passing through the sliding plate. A support block is slidably connected inside the movable seat. A gear is rotatably connected inside the movable seat to one side of the support block, and the gear extends to the outside of the movable seat. A displacement block is slidably connected inside the movable seat, and a support rod extending to the outside of the movable seat is fixedly connected to the outer wall of the displacement block. A locking block is slidably connected inside the movable seat above the displacement block. A rotating block is rotatably connected to the top of the movable seat, and a third lead screw is fixedly connected to the bottom end of the rotating block, extending into the interior of the locking block.

[0009] As a further embodiment of the present invention: the outer wall of the movable frame is provided with a first threaded hole, the first threaded hole is matched with the first lead screw, and the movable frame is C-shaped.

[0010] As a further embodiment of the present invention: the top of the movable frame is provided with a first tooth groove, which meshes with the spur gear.

[0011] As a further embodiment of the present invention: the outer wall of the connecting plate is provided with a second threaded hole, which matches the second lead screw.

[0012] As a further embodiment of the present invention: the top of the vehicle body is provided with a sliding groove for the sliding plate to slide, the outer wall of the sliding plate is provided with a mounting hole, the outer wall of the threaded rod is symmetrically provided with external threads, and the inner wall of the mounting hole is provided with an internal thread that matches the external threads.

[0013] As a further embodiment of the present invention: the inner wall of the movable groove is in contact with the outer wall of the movable seat, and both the inner wall of the movable groove and the outer wall of the support block are provided with a second tooth groove, and the outer wall of the toothed rod is provided with gear teeth, which mesh with the second tooth groove.

[0014] As a further embodiment of the present invention: the movable seat has a displacement groove inside for the displacement block to slide, the bottom end of the locking block extends into the inner cavity of the displacement groove, the top end of the displacement block is provided with a locking groove, the bottom end of the locking block engages with the locking groove, the top end of the locking block is provided with a third threaded hole, and the third threaded hole matches the third lead screw.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. By setting up a protection mechanism, if the control system malfunctions while the base is moving forward, the front protective wheel will contact the front protective step and rise along the slope. At this time, the front protective wheel and the two driven wheels form a three-point support, causing the drive wheel to detach from the drive track and be suspended in the air. Even if the drive wheel continues to rotate, the base will not continue to move forward. This facilitates the safe protection of the base's movement and prevents the base from rushing off the track and causing a serious safety accident when the position detection system malfunctions.

[0017] 2. By setting up a moving mechanism, the first motor drives the first lead screw to rotate, the first lead screw rotates to move the movable frame, the movable frame moves to rotate the spur gear, the spur gear rotates to rotate the second lead screw, the second lead screw rotates to move the connecting plate, the connecting plate moves to move the front protection step and the rear protection step into the inner cavity of the drive track, which facilitates the movement of the front protection step and the rear protection step into and out of the drive track, and facilitates the movement of the drive wheel between the front protection step and the rear protection step;

[0018] 3. By setting up a placement mechanism, the film is placed on the arc-shaped top of the support block, and then the support rod is pushed to move into the inner cavity of the steel core; the second motor is started to drive the threaded rod to rotate, and the rotation of the threaded rod drives the movable seat to move downward, thereby causing the gear to rotate. The rotation of the gear drives the support block to move downward, and the support block moves downward and separates from the film. At this time, the displacement block contacts the steel core, thereby supporting and positioning the film, which facilitates the placement and movement of the film, and does not cause compression or damage to the film during the movement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the vehicle body structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the movable frame of the present invention;

[0022] Figure 4 This is a schematic diagram of the connecting plate of the present invention;

[0023] Figure 5 This is a cross-sectional view of the vehicle body of the present invention;

[0024] Figure 6 This is a cross-sectional view of the mounting base of the present invention;

[0025] Figure 7 This is a cross-sectional view of the movable seat of the present invention;

[0026] Figure 8 This is a schematic diagram of the installation of the support rod of the present invention.

[0027] In the diagram: 1. Base; 2. Vehicle body; 3. Steel core; 4. Membrane; 5. Drive wheel; 6. Driven wheel; 7. Protection mechanism; 701. Drive rail; 702. Driven rail; 703. Front protection wheel; 704. Rear protection wheel; 705. Front protection step; 706. Rear protection step; 8. Moving mechanism; 801. First motor; 802. First lead screw; 803. Movable frame; 804. Spur gear; 805. Second lead screw; 806, connecting plate; 9, placement mechanism; 901, mounting base; 902, movable groove; 903, movable seat; 904, sliding plate; 905, connecting rod; 906, second motor; 907, threaded rod; 908, second tooth groove; 909, support block; 910, toothed rod; 911, displacement block; 912, support rod; 913, locking block; 914, third lead screw; 915, rotating block; 10, sliding groove. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0030] Please see Figures 1 to 8 In this embodiment of the invention, a safe film conveying device for a film production line includes a base 1 and a vehicle body 2. The vehicle body 2 is used to place and move the film 4. The film 4 is rolled up and sleeved on a steel core 3. The bottom end of the vehicle body 2 is equipped with a drive wheel 5 and a driven wheel 6. The movement of the vehicle body 2 is protected by a protection mechanism 7. The protection mechanism 7 includes a drive rail 701 and a driven rail 702. The drive rail 701 is located at the top of the base 1, and the driven rail 702 is located at the top of the base 1 and on both sides of the drive rail 701. The drive rail 701 is used for the drive wheel 5 to slide, and the driven rail 702 is used for the driven wheel 6 to slide. The bottom end of the vehicle body 2 is equipped with a front protection wheel 703 and a rear protection wheel 704 at both ends of the drive wheel 5. The inner cavity of the drive rail 701 is provided with a front protection step 705 and a rear protection step 706. The front protection step 705 and the rear protection step 706 are moved into the drive rail 701 by a moving mechanism 8. The film 4 is placed on the vehicle body 2 by a placing mechanism 9.

[0031] In this embodiment: when moving forward, if the control system malfunctions, the base 1 moves forward, the front protective wheel 703 contacts the front protective step 705 and rises along the slope. At this time, the front protective wheel 703 and the two driven wheels 6 form a three-point support, causing the drive wheel 5 to detach from the drive track 701 and be suspended in the air. Even if the drive wheel 5 continues to rotate, the base 1 will not continue to move forward.

[0032] When reversing, if the control system malfunctions, the base 1 will move backward, and the rear protection wheel 704 will contact the rear protection step 706 and rise along the slope. At this time, the rear protection wheel 704 and the two driven wheels 6 form a three-point fulcrum, causing the drive wheel 5 to detach from the drive rail 701 and suspend in the air. Even if the drive rail 701 continues to rotate, the base 1 will not continue to move backward. This facilitates safe protection for the movement of the base 1 and prevents the base 1 from rushing off the rail and causing a serious safety accident when the position detection system malfunctions.

[0033] It is worth noting that the drive track 701 is equipped with a front protective step 705 and a rear protective step 706 at both ends. The height of the protective step is 20 mm lower than the lower end of the car body 2, and the slope of the protective step is about 35 degrees. The drive wheel 5 is equipped with a front protective wheel 703 and a rear protective wheel 704 along the running direction. The diameter of the front protective wheel 703 and the rear protective wheel 704 is 1 / 2 of the diameter of the drive wheel 5. The rear protective wheel 704 and the front protective wheel 703 are 15 mm higher than the track surface.

[0034] Please refer to this carefully. Figures 3 to 4 The moving mechanism 8 includes a first motor 801, which is installed inside the base 1. The output end of the first motor 801 is connected to a first lead screw 802. The outer wall of the first lead screw 802 is connected to a movable frame 803. The movable frame 803 is slidably connected inside the base 1 and located below the drive rail 701. The top of the movable frame 803 inside the base 1 is rotatably connected to a spur gear 804. One end of the spur gear 804 is fixedly connected to a second lead screw 805. The outer wall of the second lead screw 805 is connected to a connecting plate 806. The connecting plate 806 is slidably connected inside the base 1. The front protective step 705 and the rear protective step 706 are respectively fixedly connected to the two ends of the connecting plate 806.

[0035] In this embodiment: when the front protective step 705 and the rear protective step 706 are moved into the inner cavity of the drive track 701, the first motor 801 is started. The operation of the first motor 801 drives the first lead screw 802 to rotate. The rotation of the first lead screw 802 drives the movable frame 803 to move. The movement of the movable frame 803 drives the spur gear 804 to rotate. The rotation of the spur gear 804 drives the second lead screw 805 to rotate. The rotation of the second lead screw 805 drives the connecting plate 806 to move. The movement of the connecting plate 806 drives the front protective step 705 and the rear protective step 706 into the inner cavity of the drive track 701, which facilitates the movement of the front protective step 705 and the rear protective step 706 into and out of the drive track 701, and facilitates the movement of the drive wheel 5 between the front protective step 705 and the rear protective step 706.

[0036] Please refer to this carefully. Figures 5 to 8 The placement mechanism 9 includes a mounting base 901, which is fixedly connected to the top of the vehicle body 2. The inner wall of the mounting base 901 has a movable groove 902, and a movable seat 903 is slidably connected to the inner wall of the movable groove 902. A sliding plate 904 is symmetrically slidably connected to the top of the vehicle body 2. A connecting rod 905 is rotatably connected to the top of the sliding plate 904, and the connecting rod 905 is rotatably connected to the movable seat 903. A second motor 906 is mounted on the outer wall of the vehicle body 2. The output end of the second motor 906 is connected to a threaded rod 907 that passes through the sliding plate 904. A support block 909 is slidably connected inside the movable seat 903. Inside the movable seat 903, a gear 910 is rotatably connected to one side of the support block 909. The gear 910 extends to the outside of the movable seat 903. Inside the movable seat 903, a displacement block 911 is slidably connected. The outer wall of the displacement block 911 is fixedly connected to a support rod 912 extending to the outside of the movable seat 903. Inside the movable seat 903, above the displacement block 911, a locking block 913 is slidably connected. The top of the movable seat 903 is rotatably connected to a rotating block 915. The bottom end of the rotating block 915 is fixedly connected to a third lead screw 914, which extends into the interior of the locking block 913.

[0037] In this embodiment: when the film 4 is placed, the top of the movable seat 903 moves out of the movable groove 902, and the film 4 is placed on the arc-shaped top of the support block 909. Then, the support rod 912 is pushed to move into the inner cavity of the steel core 3. After completion, the rotating block 915 is rotated. The rotation of the rotating block 915 drives the third lead screw 914 to rotate. The rotation of the third lead screw 914 drives the locking block 913 to move and engage with the support rod 912, thereby performing a positioning operation on the displacement block 911 and the support rod 912.

[0038] Then, the second motor 906 is started. The second motor 906 drives the threaded rod 907 to rotate. The rotation of the threaded rod 907 drives the two slide plates 904 to move in opposite directions. The movement of the slide plates 904 drives the movable seat 903 to move downward in the movable groove 902 through the connecting rod 905. The movement of the movable seat 903 drives the rack 910 to move along the inner wall of the movable groove 902, thereby causing the rack 910 to rotate. The rotation of the rack 910 drives the support block 909 to move downward. The support block 909 moves downward and separates from the membrane 4. At this time, the displacement block 911 contacts the steel core 3, thereby supporting and positioning the membrane 4.

[0039] When the film 4 is removed, the second motor 906 is started to drive the movable seat 903 to move upward. At this time, the support block 909 moves upward and contacts the film 4 to support the film 4, making it easy to place and move the film 4. During the movement, the film 4 is not squeezed and is not damaged.

[0040] Please refer to this carefully. Figures 3 to 4 The outer wall of the movable frame 803 is provided with a first threaded hole, which matches the first lead screw 802. The movable frame 803 is C-shaped, and the top of the movable frame 803 is provided with a first tooth groove, which meshes with the spur gear 804.

[0041] In this embodiment: the first motor 801 is started, the first motor 801 drives the first lead screw 802 to rotate, the rotation of the first lead screw 802 drives the movable frame 803 to move, and the movement of the movable frame 803 drives the spur gear 804 to rotate.

[0042] Please refer to this carefully. Figures 3 to 4 The outer wall of the connecting plate 806 is provided with a second threaded hole, which is matched with the second lead screw 805.

[0043] In this embodiment: the movable frame 803 moves to drive the spur gear 804 to rotate, the spur gear 804 rotates to drive the second lead screw 805 to rotate, the second lead screw 805 rotates to drive the connecting plate 806 to move, and the connecting plate 806 moves to drive the front protective step 705 and the rear protective step 706 into the inner cavity of the drive track 701.

[0044] Please refer to this carefully. Figures 5 to 8 The top of the vehicle body 2 is provided with a slide groove 10 for the slide plate 904 to slide. The outer wall of the slide plate 904 is provided with a mounting hole. The outer wall of the threaded rod 907 is symmetrically provided with external threads, and the inner wall of the mounting hole is provided with an internal thread that matches the external threads.

[0045] In this embodiment: the second motor 906 drives the threaded rod 907 to rotate, the rotation of the threaded rod 907 drives the two slide plates 904 to move in opposite directions, and the movement of the slide plates 904 drives the movable seat 903 to move downward in the movable groove 902 through the connecting rod 905.

[0046] Please refer to this carefully. Figures 5 to 8 The inner wall of the movable groove 902 fits against the outer wall of the movable seat 903. The inner wall of the movable groove 902 and the outer wall of the support block 909 are both provided with second tooth grooves 908. The outer wall of the toothed rod 910 is provided with gear teeth, which mesh with the second tooth grooves 908.

[0047] In this embodiment: the sliding plate 904 moves and drives the movable seat 903 to move downward in the movable groove 902 via the connecting rod 905. The movement of the movable seat 903 drives the rack 910 to move along the inner wall of the movable groove 902, thereby causing the rack 910 to rotate. The rotation of the rack 910 drives the support block 909 to move downward.

[0048] Please refer to this carefully. Figures 5 to 8 The movable seat 903 has a displacement groove inside for the displacement block 911 to slide. The bottom end of the locking block 913 extends into the inner cavity of the displacement groove. The top end of the displacement block 911 is provided with a locking groove. The bottom end of the locking block 913 engages with the locking groove. The top end of the locking block 913 is provided with a third threaded hole, which matches the third lead screw 914.

[0049] In this embodiment: the support rod 912 is pushed to move into the inner cavity of the steel coil core 3. After completion, the rotating block 915 is rotated. The rotation of the rotating block 915 drives the third lead screw 914 to rotate. The rotation of the third lead screw 914 drives the locking block 913 to move and engage with the support rod 912, thereby performing a positioning operation on the displacement block 911 and the support rod 912.

[0050] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A safe film conveying device for a film production line, comprising a base (1) and a carriage (2), the carriage (2) being used for placing and moving a film (4), the film (4) being wound onto a steel core (3), and a drive wheel (5) and a driven wheel (6) being mounted at the bottom end of the carriage (2), characterized in that, The movement of the vehicle body (2) is protected by a protective mechanism (7). The protective mechanism (7) includes a drive rail (701) and a driven rail (702). The drive rail (701) is located at the top of the base (1), and the driven rail (702) is located at the top of the base (1) and on both sides of the drive rail (701). The drive rail (701) is for the drive wheel (5) to slide, and the driven rail (702) is for the driven wheel (6) to slide. The bottom of the vehicle body (2) is located at both ends of the drive wheel (5) and the front protective wheel (703) and the rear protective wheel (704) are respectively installed. The inner cavity of the drive rail (701) is provided with a front protective step (705) and a rear protective step (706). The front protective step (705) and the rear protective step (706) are moved into the drive rail (701) by the moving mechanism (8). The film (4) is placed on the vehicle body (2) by the placement mechanism (9). The placement mechanism (9) includes a mounting base (901), which is fixedly connected to the top of the vehicle body (2). The inner wall of the mounting base (901) has a movable groove (902), and a movable seat (903) is slidably connected to the inner wall of the movable groove (902). A sliding plate (904) is symmetrically slidably connected to the top of the vehicle body (2). A connecting rod (905) is rotatably connected to the top of the sliding plate (904), and the connecting rod (905) is rotatably connected to the movable seat (903). A second motor (906) is installed on the outer wall of the vehicle body (2). The output end of the second motor (906) is connected to a threaded rod (907) that passes through the sliding plate (904). A support block (909) is slidably connected inside the movable seat (903). A gear (910) is rotatably connected to the inside of the movable seat (903) on one side of the support block (909), and the gear (910) extends to... The movable seat (903) is externally connected to a displacement block (911) which is slidably connected to the interior of the movable seat (903). A support rod (912) extending to the exterior of the movable seat (903) is fixedly connected to the outer wall of the displacement block (911). A locking block (913) is slidably connected to the interior of the movable seat (903) above the displacement block (911). A rotating block (915) is rotatably connected to the top of the movable seat (903). A third lead screw (914) is fixedly connected to the bottom of the rotating block (915). The third lead screw (914) extends into the interior of the locking block (913). The inner wall of the movable groove (902) fits against the outer wall of the movable seat (903). The inner wall of the movable groove (902) and the outer wall of the support block (909) are both provided with a second tooth groove (908). The outer wall of the toothed rod (910) is provided with gear teeth, which mesh with the second tooth groove (908).

2. The safe film conveying device for a thin film production line according to claim 1, characterized in that, The moving mechanism (8) includes a first motor (801), which is installed inside the base (1). The output end of the first motor (801) is connected to a first lead screw (802). The outer wall of the first lead screw (802) is connected to a movable frame (803). The movable frame (803) is slidably connected inside the base (1) and located below the drive rail (701). The interior of the base (1) is rotatably connected to the top of the movable frame (803). One end of the spur gear (804) is fixedly connected to a second lead screw (805). The outer wall of the second lead screw (805) is connected to a connecting plate (806). The connecting plate (806) is slidably connected inside the base (1). The front protective step (705) and the rear protective step (706) are respectively fixedly connected to the two ends of the connecting plate (806).

3. The safe film conveying device for a thin film production line according to claim 2, characterized in that, The outer wall of the movable frame (803) is provided with a first threaded hole, which matches the first lead screw (802). The movable frame (803) is C-shaped.

4. A safe film conveying device for a thin film production line according to claim 2, characterized in that, The top of the movable frame (803) is provided with a first tooth groove, which meshes with the spur gear (804).

5. A safe film conveying device for a thin film production line according to claim 2, characterized in that, The outer wall of the connecting plate (806) is provided with a second threaded hole, which is matched with the second lead screw (805).

6. A safe film conveying device for a thin film production line according to claim 1, characterized in that, The top of the vehicle body (2) is provided with a slide groove (10) for the slide plate (904) to slide. The outer wall of the slide plate (904) is provided with a mounting hole. The outer wall of the threaded rod (907) is symmetrically provided with external threads. The inner wall of the mounting hole is provided with an internal thread that matches the external threads.

7. A safe film conveying device for a thin film production line according to claim 1, characterized in that, The movable seat (903) has a displacement groove inside for the displacement block (911) to slide. The bottom end of the locking block (913) extends into the inner cavity of the displacement groove. The top end of the displacement block (911) is provided with a locking groove. The bottom end of the locking block (913) engages with the locking groove. The top end of the locking block (913) is provided with a third threaded hole, which matches the third lead screw (914).

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