Motor outgoing line high-speed wrapping device and application method thereof

Abstract

The invention discloses a motor outgoing line high-speed wrapping device and an application method thereof. The motor outgoing line high-speed wrapping device is characterized by further comprising a wrapping tool vertically installed on a rack and a first motor driving a pay-off device and a take-up device to rotate. The motor II is used for driving the wrapping tool to rotate; the fixed insulating film discharging frame is arranged on the rack and above the central control rotating tool; according to the invention, through the arrangement of the wrapping tool, the wrapping tool is vertically installed on the rack, so that the situation that an insulating film is separated from equipment, is thrown out by inertia and hurts an operator or other objects on the edge due to eccentricity caused by gravity when the wrapping tool rotates is effectively reduced; and through the arrangement of the first motor, one motor is used for controlling a plurality of devices to rotate, the cost is reduced, meanwhile, the equipment size is effectively reduced, and the occupied area of the equipment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of winding devices, and in particular to a high-speed winding device for motor lead wires and an application method thereof. Background Art

[0002] The motor lead wire wrapping machine is a device specially used for winding insulating materials, protective layers or other functional materials on the motor lead wires; the wrapping layer of a general cable is composed of an inner insulating layer, an inner braided layer, an outer braided layer and an outer insulating layer. The existing wrapping equipment is capable of wrapping multiple layers at one time, but the outermost insulating layer generally needs to be wrapped according to customer requirements. Therefore, the outermost wrapping layer paper generally adopts a single-layer wrapping method. The existing wrapping equipment structure is horizontal and vertical, mainly comprising a pay-off rack, a tensioner, a wire wheel, a winding mold clamp, a wrapping device, a take-up rack, etc.; however, the wrapping device of the existing equipment is easily eccentric due to the influence of gravity during rotation, causing the wrapping material and the insulating film to separate from the equipment, and being thrown out due to inertia to injure the operator or other objects on the side, and the structure is complex and occupies a large area. It is mostly driven by two or more motors, so the noise is large, the energy consumption is high, and the equipment is not easy to move at any time once it is fixed, and the adaptability is poor; for this reason, a high-speed wrapping device for motor lead wires and an application method thereof are proposed. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and to provide a motor lead wire high-speed winding device and an application method thereof.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-speed winding device for motor lead wires, a high-speed winding device for motor lead wires, comprising a frame, a wire-releasing device, a wire-receiving device and a controller connected to the frame, characterized in that: it also includes a winding tooling installed vertically on the frame, a motor 1 for driving the wire-releasing device and the wire-receiving device to rotate, a motor 2 for driving the winding tooling to rotate, and a fixed insulating film unloading rack arranged on the frame and above the central control rotating tooling; the winding tooling includes a hollow rotating shaft driven by the motor 2, a chassis fixedly connected to the hollow rotating shaft for placing an insulating film coil, a winding rod connected to the chassis for the lead wires and the insulating film to be inserted, an open fixing ring detachably arranged on the winding rod for fixing the insulating film coil, an adjusting spring, and a threaded sleeve, a guide rod arranged on the side of the chassis for assisting in the winding of the insulating film, and a wire outlet port arranged at the bottom of the hollow rotating shaft.

[0005] Further preferably, the wrapping rod is provided with a guide opening for guiding the insulation film to enter.

[0006] Further preferably, the motor 1 is connected to a polished rod cable arranger via a pulley.

[0007] Further preferably, the frame is provided with a plurality of wire passing wheels for assisting and tensioning the cables.

[0008] Further preferably, the fixed insulating film unloading rack is replaced by an automatic unloading rack.

[0009] Further preferably, the automatic unloading rack includes a fixed unloading tray, a through hole is provided in the middle of the fixed unloading tray for facilitating the passage of the insulating film coil, a movable unloading tray movably arranged on the fixed unloading tray, and a driver drives the movable unloading tray to move on the fixed unloading tray to open a unloading channel; a plurality of sliders are provided at the bottom of the movable unloading tray, and a guide rail adapted to the slider is provided at the top of the fixed unloading rack.

[0010] Further preferably, it also includes an insulating film coil limiting mechanism arranged on the fixed pay-off reel, the limiting mechanism includes a U-shaped limiting frame driven by a second driver arranged on the fixed pay-off reel, and the position of the U-shaped limiting frame is between the first roll and the second roll of insulating film coil on the automatic pay-off rack from bottom to top.

[0011] Further preferably, a visual detector is provided below the automatic unloading rack.

[0012] The present invention also proposes an application method of the wrapping device, and the application method is as follows: First, place several insulating films on a fixed insulating film unloading rack, the number of which needs to meet the requirement of at least one roll of cable length.

[0013] Then place the cable to be wrapped on the pay-off device, and place the empty cable reel on the take-up device; Then, the cable head on the pay-off device passes through several wire wheels, the insulating film holes on the fixed insulating film pay-off rack, the holes of the fixed insulating film pay-off rack and the insulating film, and then passes through the outlet port at the bottom of the insulating film, passes through several wire wheels, and fixes the cable head on the cable drum on the take-up device; Pull one end of the insulation film upward around the guide rod, manually pre-wrap one end of the insulation film around the cable, and clamp the insulation mold in the guide opening of the wrapping rod; During operation, the controller controls the motor 1 and the motor 2 to work, thereby driving the wrapping tooling, the wire-releasing device, and the wire-receiving device to work, and wrap the insulating film on the cable. When a roll of insulating film is used up, the wrapping device is manually controlled by the controller to stop working, and the next roll is taken out from the fixed insulating film unwinding rack, and the coil is passed through the wrapping rod and placed on the chassis, and fixed by the cooperation of the threaded sleeve, the adjusting spring and the open fixing ring; When the automatic unloading rack detects that the insulating film on the chassis is used up through the visual detector, the controller is directly triggered to stop the wrapping device, and the cylinder connected to the movable unloading tray on the automatic unloading rack is controlled to work, so that the slider on the movable unloading tray slides open along the guide rail on the fixed unloading tray, and the insulating film under the U-shaped limit frame falls from the hole in the middle of the fixed unloading tray, passes through the wrapping rod and falls onto the chassis, and then the insulating film is manually fixed to the chassis.

[0014] The beneficial effects of the present invention are as follows: by setting the wrapping tool, the wrapping tool is vertically installed on the frame, which effectively reduces the influence of gravity when the wrapping tool rotates, causing eccentricity, resulting in the insulation film being separated from the device and thrown out by inertia, thereby injuring the operator or other objects on the side; by setting the motor one, a plurality of devices are controlled by one motor to rotate, which reduces the cost and effectively reduces the size of the equipment and the floor space occupied by the equipment; Through the setting of the bare rod cable arranging device, when the cable is wound or discharged, the bare rod cable arranging device can reciprocate left and right along the axis, synchronized with the winding or discharge position of the winding reel, so that the cable can be wound on the cable reel in an orderly manner or the cable on the cable reel can be discharged in an orderly manner; Through the setting of the fixed insulating film unwinding rack, if the length of the insulating film is less than the length of a roll of cable, the new insulating film has been put on the cable in advance. You only need to take it down from the insulating film unwinding rack along the cable, put it on the wrapping rod, rotate the threaded sleeve, and the threaded sleeve is upward. The open fixing ring can be taken out from the wrapping rod, and then the new insulating film is placed on the chassis, and the open fixing ring is installed. The threaded sleeve is rotated again, and the threaded sleeve is downwardly adjusted to press the open fixing ring by adjusting the spring, and the new insulating film can be replaced without cutting the cable or removing the cable from the equipment. After replacing the insulating film, the cable can be re-threaded and wrapped, which greatly improves the production efficiency. Through the setting of the automatic unwinding rack, when the visual sensor senses the insulating film on the chassis, the visual sensor can sense the insulating film on the chassis. When the film is used up, the equipment is temporarily stopped, and the driver is used to open the movable discharge tray, so that the insulating film automatically falls onto the chassis of the wrapping tooling, which improves the automation capability of the equipment, reduces the labor cost of a single device, and allows one operator to manage multiple devices at the same time; through the setting of the U-shaped limit frame, the second driver is used to extend and retract the U-shaped limit frame left and right. When the insulating film falls, the U-shaped limit frame retracts to the right along the direction of the second driver. When new insulating film falls on the automatic discharge rack, the second driver is activated, and the U-shaped limit frame extends to the left, so that the position of the U-shaped limit frame is between the first roll of insulating film and the second roll of insulating film on the automatic discharge rack from bottom to top, thereby limiting the amount of insulating film that falls from the automatic discharge rack at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a structural front view of the present invention; Attached Figure 2It is a left side view of the structure of the present invention; Attached Figure 3 It is a top view of the structure of the present invention; Attached Figure 4 It is a partial enlarged view of the present invention; Attached Figure 5 It is a structural schematic diagram of embodiment 2 of the present invention.

[0016] Attached Figure 6 It is a structural schematic diagram of the automatic unloading rack of the present invention; Attached Figure 7 It is a structural schematic diagram of a fixed material discharging tray of the present invention; Attached Figure 8 It is a structural schematic diagram of a movable discharge tray of the present invention.

[0017] Legend: 1. Frame; 2. Pay-off device; 3. Take-up device; 4. Controller; 5. Insulating film; 51 chassis; 52. Wrapping rod; 521. Open fixing ring; 522. Adjusting spring; 523. Threaded sleeve; 524. Guide port; 53. Guide rod; 54. Hollow shaft; Motor 1; 7. Motor 2; 8. Fixed insulating film unloading rack; 81. Automatic unloading rack; 811. Fixed unloading tray; 8111. Guide rail; 812. Movable unloading tray; 8121. Slider; 813. U-shaped limit rack; 814. Driver; 815. Second driver; 9. Wire wheel; 10. Bare rod wire arranger; 11. Visual detector. DETAILED DESCRIPTION

[0018] Hereinafter, we will further explain the motor lead wire high-speed wrapping device and its application method described in the present invention in conjunction with the accompanying drawings.

[0019] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0020] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense; for example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1-Figure 8As shown in, a high-speed wrapping device for motor lead wires and an application method thereof, in one embodiment, comprises a frame 1, a pay-off device 2, a take-up device 3 and a controller 4 connected to the frame 1, characterized in that it also comprises a wrapping tool 5 vertically mounted on the frame 1, a motor 6 driving the pay-off device 2 and the take-up device 3 to rotate, a motor 2 7 driving the wrapping tool 5 to rotate, and a fixed insulating film unwinding rack 8 arranged on the frame 1 and above the central control rotating tool 5; the wrapping tool 5 comprises a hollow rotating shaft 54 ​​driven by the motor 2 7, a chassis 51 fixedly connected to the hollow rotating shaft 54 ​​for placing an insulating film coil, a wrapping rod 52 connected to the chassis 51 for inserting lead wires and insulating films, The open fixing ring 521, adjusting spring 522 and threaded sleeve 523 for fixing the insulating film coil are detachably arranged on the wrapping rod 52, the guide rod 53 for assisting the insulating film wrapping is arranged on the side of the chassis 51, and the outlet port is arranged at the bottom of the hollow rotating shaft 54; through the arrangement of the wrapping tool 5, the wrapping tool 5 is vertically installed on the frame 1, which effectively reduces the eccentricity caused by gravity when the wrapping tool 5 rotates, causing the insulating film to detach from the equipment and be thrown out by inertia, injuring the operator or other objects nearby; through the arrangement of the motor 6, a plurality of devices are controlled by one motor to rotate, which reduces the cost while effectively reducing the size of the equipment and reducing the floor space occupied by the equipment.

[0022] In one embodiment, the wrapping rod 52 is provided with a guide opening 524 for guiding the insulating film to enter.

[0023] In one embodiment, the motor 6 is connected to a bare rod cable arranger 10 via a pulley; through the setting of the bare rod cable arranger 10, when the cable is wound or discharged, the bare rod cable arranger 10 can move back and forth along the axis, synchronized with the winding or discharge position of the winding reel, so that the cable can be wound on the cable reel in an orderly manner or the cable on the cable reel can be discharged in an orderly manner.

[0024] In one embodiment, the frame 1 is provided with a plurality of wire wheels 9 for assisting and tensioning the cables.

[0025] In one embodiment, the fixed insulating film unloading rack 8 is replaced with an automatic unloading rack 81; the automatic unloading rack 81 includes a fixed unloading tray 811, a through hole is provided in the middle of the fixed unloading tray 811 for facilitating the passage of insulating film coils, a movable unloading tray 812 movably arranged on the fixed unloading tray 811, and a driver 814 that drives the movable unloading tray 812 to move on the fixed unloading tray 811 to open a material unloading channel. The movable unloading tray 812 is provided with a plurality of sliders 8121 at the bottom, and the fixed unloading rack 811 is provided with a guide rail 8111 adapted to the slider 8121 at the top; it also includes an insulating film coil limiting mechanism arranged on the fixed unloading tray 811, the limiting The positioning mechanism includes a second driver 815 arranged on the fixed pay-off reel 811 and a U-shaped limit frame 813 driven by the second driver 815, wherein the U-shaped limit frame 813 is located between the first roll and the second roll of insulating film coils on the automatic pay-off rack 81 from bottom to top; a visual detector 11 is arranged below the automatic pay-off rack 81; through the setting of the fixed insulating film pay-off rack 8, if the length of the insulating film is less than the length of a roll of cable, the new insulating film has been put on the cable in advance, and it only needs to be taken down from the fixed insulating film pay-off rack 8 along the cable, and put into the wrapping rod 52, and the threaded sleeve 523 is rotated, and the threaded sleeve 523 is upward, and the open fixing ring 52 1 can be taken out from the wrapping rod 51, and then a new insulating film is placed on the chassis 51, the open fixing ring 521 is installed, and then the threaded sleeve 523 is rotated. The threaded sleeve 523 presses the open fixing ring 521 downward through the adjustment spring 522, and the new insulating film can be replaced. There is no need to cut the cable or take the cable out of the equipment. After the insulating film is replaced, the cable is re-threaded and wrapped, which greatly improves the production efficiency. Through the setting of the automatic unloading rack 81, when the visual sensor 11 senses that the insulating film on the chassis 51 is used up, the equipment is temporarily stopped, and the driver 814 is used to open the movable unloading tray 812, so that the insulating film automatically falls onto the chassis 51 of the wrapping tool 5, which improves The automation capability of the equipment is improved, the labor cost of a single equipment is reduced, and one operator can manage multiple equipment at the same time; through the setting of the U-shaped limit frame 813, the second driver 815 is used to make the U-shaped limit frame 813 extend and retract left and right. When the insulating film falls, the U-shaped limit frame 813 retracts to the right along the direction of the second driver 815. When a new insulating film falls on the automatic unloading rack 81, the second driver 815 is activated, and the U-shaped limit frame 813 extends to the left, so that the position of the U-shaped limit frame 813 is between the first roll of insulating film and the second roll of insulating film of the automatic unloading rack 81 from bottom to top, thereby limiting the amount of insulating film that falls from the automatic unloading rack 81 at one time. Example

[0026] First, a number of insulating films are placed on the fixed insulating film unwinding rack 8, the number of which needs to meet the needs of at least one roll of cable.

[0027] Then, the cable drum that needs to be wrapped is placed on the rotating shaft of the unwinding device 2, and the empty cable drum is placed on the rotating shaft of the take-up device 3.

[0028] Then the operator pulls out the cable head of the cable drum on the pay-off device 2, passes it along several wire-passing wheels 9, inserts it into the holes of the insulating film on the fixed insulating film pay-off rack 8, the holes of the fixed insulating film pay-off rack 8, and the wrapping rod 52, chassis 51, and hollow rotating shaft 54 ​​on the wrapping tool 5, and then passes it out from the wire outlet port at the bottom of the wrapping tool 5, passes through several wire-passing wheels 9, and fixes the wire head on the cable drum on the take-up device 4.

[0029] Then, one end of the insulating film is passed around the guide rod 53 and pulled upward, and one end of the insulating film is manually pre-wound around the cable, and the insulating mold is clamped in the guide opening 524 of the wrapping rod 52.

[0030] Finally, the controller 4 is set, and the start button is pressed. The motor 1 6 drives the take-up device 3 to rotate through the pulley to take up the wire, and then drives the gear through the chain, thereby driving the pay-off device 2 to rotate, and also drives the gear to rotate through the chain, thereby driving the bare rod cable arrangement device 10 to reciprocate left and right; the motor 2 7 drives the hollow shaft 54 ​​to rotate through the pulley, thereby driving the chassis 51 and the guide rod 53 to rotate, and at the same time drives the wrapping rod 52 installed on the hollow shaft 54 ​​through the thread to rotate, so that the insulating film is wrapped around the cable; When replacing a new coil, first rotate the threaded sleeve 523 to reset the adjustment spring 522, so that the open fixing ring 521 loosens the winding core of the used coil, then remove the open fixing ring 521, and use scissors or other tools to break the winding core of the used coil and take it out of the device, then take the new coil off the fixed insulating film unwinding rack 8. When taking it, stand the coil upright and move it along the circular hole of the fixed insulating film unwinding rack 8 toward the wrapping rod 52 until the coil is completely separated from the fixed insulating film unwinding rack 8, then put it in a horizontal state on the chassis 51, and pass the coil from the wrapping rod (52) to the chassis (51), and fix it by the cooperation of the threaded sleeve (523), the spring (522) and the open fixing ring (521); Example

[0031] The difference between this embodiment and the first embodiment is that the fixed insulating film unloading rack 8 Replaced with automatic unloading rack 81.

[0032] When the visual detector 11 detects that the insulating film on the chassis 51 is used up, the visual detector 11 sends a signal to the controller 4, and the controller 4 controls the wrapping device to stop; the threaded sleeve 523 is manually rotated to reset the adjustment spring 522, so that the open fixing ring 521 loosens the winding core of the used coil, and then the open fixing ring 521 is removed, and the winding core of the used coil is destroyed with scissors or other tools, and it is taken out of the device. The button on the controller 4 is manually operated to start the driver 814, so that the driver 814 drives the movable discharge tray 812 to open to both sides through the slider 8111 along the guide rail 8111 on the fixed discharge tray 811, so that the traditional coil wrapping rod 52 falls directly onto the chassis 51. At the same time, the button on the controller 4 is manually operated to cause the driver 814 to drive the movable discharge tray 811 to reset. The bottom of the arc of the two movable discharge trays 811 are respectively provided with an in-position sensor and a screw that generates an induction signal with the in-position sensor. When the movable discharge tray 811 is completely reset, an in-position signal is sent to the controller 4, and the controller After receiving the signal, the second driver 815 is controlled to retract, thereby driving the U-shaped limit frame 813 on the second driver 815 to retract and be withdrawn from the original coil, so that the coil falls on the automatic unloading rack 81, and then the button on the controller 4 is manually controlled to control the second driver 815 to extend, thereby driving the U-shaped limit frame 813 on the second driver 815 to extend, so that the position of the U-shaped limit frame 813 is between the first roll and the second roll of the insulating film coil on the automatic unloading rack 81 from bottom to top, and finally it is fixed by the cooperation of the threaded sleeve 523, the adjustment spring 522 and the open fixing ring 521.

[0033] The protection scope of the present invention is not limited to the above embodiments and their variations. Conventional modifications and replacements made by those skilled in the art based on the contents of this embodiment all fall within the protection scope of the present invention.

Claims

1. A high-speed winding device for motor lead wires, comprising a frame (1), a wire-releasing device (2) connected to the frame (1), a wire-receiving device (3) and a controller (4), characterized in that: The invention also comprises a wrapping tool (5) vertically mounted on the frame (1), a motor 1 (6) for driving the pay-off device (2) and the take-up device (3) to rotate, a motor 2 (7) for driving the wrapping tool (5) to rotate, and a fixed insulating film unwinding rack (8) arranged on the frame (1) and above the central control rotating tool (5); the wrapping tool (5) comprises a hollow rotating shaft (54) driven by the motor 2 (7), a chassis (51) fixedly connected to the hollow rotating shaft (54) for placing the insulating film coil, a wrapping rod (52) connected to the chassis (51) for leading out wires and inserting insulating film, an open fixing ring (521) detachably arranged on the wrapping rod (52) for fixing the insulating film coil, an adjusting spring (522), and a threaded sleeve (523), a guide rod (53) arranged on the side of the chassis (51) for assisting the wrapping of the insulating film, and a wire outlet port arranged at the bottom of the hollow rotating shaft (54).

2. A high-speed wrapping device for motor lead wires according to claim 1, characterized in that: The wrapping rod (52) is provided with a guide opening (524) for guiding the insulating film to enter.

3. The high-speed wrapping device for motor lead wires according to claim 1, characterized in that: The motor 1 (6) drives the polished rod cable arranger (10) via a pulley.

4. The high-speed wrapping device for motor lead wires according to claim 1, characterized in that: The frame (1) is provided with a plurality of wire passing wheels (9) for assisting and tensioning the cables.

5. The high-speed wrapping device for motor lead wires according to claim 1, characterized in that: The fixed insulating film unwinding rack (8) is replaced with an automatic unwinding rack (81).

6. A high-speed wrapping device for motor lead wires according to claim 5, characterized in that: The automatic unloading rack (81) comprises a fixed unloading tray (811), a through hole is provided in the middle of the fixed unloading tray (811) for facilitating the passage of insulating film coils, a movable unloading tray (812) movably arranged on the fixed unloading tray (811), and a driver (814) for driving the movable unloading tray (812) to move on the fixed unloading tray (811) to open a material unloading channel. The movable unloading tray (812) is provided with a plurality of sliders (8121) at the bottom, and the fixed unloading rack (811) is provided with a guide rail (8111) adapted to the sliders (8121) at the top.

7. A high-speed wrapping device for motor lead wires according to claim 6, characterized in that: It also includes an insulating film coil limiting mechanism disposed on the fixed pay-off reel (811), the limiting mechanism including a second driver (815) disposed on the fixed pay-off reel (811) and a U-shaped limiting frame (813) driven by the second driver (815), the U-shaped limiting frame (813) being located from bottom to top between a first roll and a second roll of insulating film coils on the automatic unwinding frame (81).

8. A high-speed wrapping device for motor lead wires according to claim 7, characterized in that: A visual detector (11) is provided below the automatic unloading rack (81).

9. The application method of the wrapping device according to any one of claims 1 to 8, characterized in that: The application method is as follows: First, a plurality of insulating films are placed on a fixed insulating film unwinding rack (8), the number of which needs to meet the requirement of at least one roll of cable length; then, the cable to be wrapped is placed on a wire unwinding device (2), and an empty cable reel is placed on a wire taking-up device (3); Then, the cable head on the wire-releasing device passes through a plurality of wire-passing wheels (9), the insulating film holes on the fixed insulating film unwinding rack (8), the holes of the fixed insulating film unwinding rack (8) and the insulating film, and then passes through the wire outlet port at the bottom of the insulating film, passes through a plurality of wire-passing wheels (9), and fixes the cable head on the cable drum on the wire-receiving device (3); One end of the insulating film is pulled upward around the guide rod (53), one end of the insulating film is manually pre-wound around the cable, and the insulating mold is clamped in the guide opening (524) of the wrapping rod (52); When working, the controller (4) controls the motor 1 (6) and the motor 2 (7) to work, thereby driving the wrapping tool (5), the wire-releasing device (2), and the wire-receiving device (3) to work, and wrap the insulating film on the cable. When a roll of insulating film is used up, the wrapping device is manually controlled by the controller to stop working, and the next roll is taken from the fixed insulating film unwinding rack (8), and the coil is passed through the wrapping rod (52) and placed on the chassis (51), and fixed by the cooperation of the threaded sleeve (523), the adjustment spring (522) and the open fixing ring (521); When the automatic unloading rack (81) detects that the insulating film on the chassis (51) is used up through the visual detector (11), the controller is directly triggered to stop the wrapping device, and the cylinder connected to the movable unloading tray (812) on the automatic unloading rack (81) is controlled to work, so that the slider (8121) on the movable unloading tray (812) slides open along the guide rail (8111) on the fixed unloading tray (811), and the insulating film under the U-shaped limit frame (813) falls from the hole in the middle of the fixed unloading tray (8121), passes through the wrapping rod and falls on the chassis (51), and then the insulating film is manually fixed on the chassis (51).

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