Constant-speed discharging device used on bag making machine

Abstract

The utility model relates to the field of bag making machine devices, in particular to a constant-speed discharging device used on a bag making machine, which comprises a rack, a bracket is arranged on one side of the rack, a plurality of sliding shafts are fixed on the bracket, the sliding shafts penetrate through the rack and are connected with the rack in a sliding manner, an ultrasonic electric eye is further fixed on the rack, and the ultrasonic electric eye is connected with the bracket in a sliding manner. A deviation rectifying motor is further fixed to the machine frame, a lead screw is fixed to the output end of the deviation rectifying motor, a threaded pipe is further fixed to the support, the tail end of the lead screw is arranged in the threaded pipe and is in threaded connection with the threaded pipe, a rotating shaft rotationally connected with the support is further arranged on the support, and a detection plate is fixed to the rotating shaft. The support is further provided with an air expansion shaft, and the air expansion shaft is driven by an unwinding motor to rotate. According to the device, the speed of the film unwound from the film roll can be consistent with that of the film used by the bag making machine, the film is prevented from being pulled by the bag making machine, and the film is prevented from being extruded and overlapped together due to large inertia of the film roll.

Description

Technical Field

[0001] The invention relates to the field of bag making machine devices, in particular to a uniform speed material discharge device used on a bag making machine. Background Art

[0002] Bag making machine is a special equipment for making packaging bags, which is widely used in the production of packaging bags of various materials such as plastics and paper. The unwinding mechanism pulls the film from the unwinding device through the front traction device and unfolds it into a flat state. The reel of the unwinding device in the traditional unwinding mechanism is freely sleeved on the reel, and the film is unwound by pulling it by the front-end traction mechanism. For example, patent application number: CN202321495272.4 discloses an unwinding device for a PE bag making machine, including: a support seat, a ramp plate fixedly connected to the left side of the support seat, a unwinding drum is arranged above the ramp plate, a motor is fixedly connected to the front side of the support seat, and a connecting roller is arranged inside the support seat. After the film on the unwinding drum is pulled out, the connecting roller is driven to rotate by the motor, and the film is pulled by the friction between the connecting roller and the film to complete the unwinding work. However, when this type of unwinding device pulls the film through the traction mechanism, the film is greatly deformed, and the inertia of the reel is large when it is freely unwound, which makes the film easy to be squeezed and overlapped, and the film is easy to deviate, especially for intermittent film conveying, this unwinding device is even less suitable; the traction device adopts a hard traction structure, that is, through continuous tensioning and traction of the film, the friction between the film and the roller is large, and the film is hard pulled and heats and deforms.

[0003] The present invention is proposed in view of the deficiencies in the prior art. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a uniform speed discharge device used on a bag making machine.

[0005] The present invention can be implemented by the following technical solutions:

[0006] The invention discloses a uniform speed unloading device used on a bag making machine, comprising a frame, a bracket is arranged on one side of the frame, a plurality of sliding shafts are fixed on the bracket, the sliding shafts pass through the frame and are slidably connected to the frame, an ultrasonic electric eye is also fixed on the frame, a deviation correction motor is also fixed on the frame, a screw rod is fixed on the output end of the deviation correction motor, a threaded pipe is also fixed on the bracket, the end of the screw rod is arranged in the threaded pipe and is threadedly connected to the threaded pipe, a rotating shaft rotatably connected to the bracket is also arranged on the bracket, a detection plate is fixed on the rotating shaft, a detection cylinder is also arranged on the bracket, the end of the piston rod of the detection cylinder is connected to the detection plate, the end of the rotating shaft is also connected to a potentiometer, and an inflatable shaft is also arranged on the bracket, and the inflatable shaft is driven to rotate by the unwinding motor. The plastic film roll is fixed on the air shaft. After the film is pulled out, it is used by the bag making machine to make bags. The speed of the unwinding motor is adjusted according to the film speed required by the bag making machine to realize the rotation of the air shaft. The speed of the film pulled out from the film roll is consistent with the use of the bag making machine. When the film moves, the edge of the film passes under the ultrasonic electric eye. When the film deviates, the deviation correction motor starts, and the deviation correction motor drives the screw rod to turn. Since the screw rod is threadedly connected with the threaded tube, when the screw rod rotates, the threaded tube moves in the direction of the screw rod, so that the bracket moves with the threaded tube, thereby adjusting the position of the film roll, and making the edge of the film roll pass under the ultrasonic electric eye again to realize Correct the deviation of the film to ensure the stable operation of the bag making machine. When the film roll gradually decreases, since the piston rod of the detection cylinder is in an extended state, the end of the detection plate is against the edge of the film roll. When the film roll gradually decreases, the detection plate rotates around the rotating axis, and the detection plate drives the rotating axis to rotate. The rotating axis rotates, and the detection gear rotates with the rotating axis. The diameter of the film roll can be confirmed by the potentiometer, thereby adjusting the output of the unwinding motor, thereby adjusting the speed of the air shaft, thereby ensuring that the film released from the film roll is consistent with the film used by the bag making machine, avoiding the bag making machine pulling the film, and avoiding the large inertia of the film roll causing the film to be squeezed and overlapped.

[0007] Preferably, a roller is further provided at the end of the detection plate, and the roller contacts the film and rolls on the film to avoid scratching the film.

[0008] Preferably, a rotating gear is fixed to the end of the rotating shaft, the potentiometer is fixed on the bracket, and a detection gear is also provided on the potentiometer, and the detection gear is meshed with the aforementioned rotating gear.

[0009] Preferably, support plates rotatably connected to the support are symmetrically arranged on both sides of the support, and U-shaped slots for fixing the inflatable shaft are arranged on the support plates, a driven gear is fixed to the end of the inflatable shaft, and a driving gear is fixed to the output end of the unwinding motor, and the driving gear is meshed with the driven gear. Support cylinders are symmetrically arranged on both sides of the support, and the piston rod ends of the support cylinders are connected to the support plates at corresponding positions. When fixing the film roll, roll the film roll to the support plate position, the inflatable shaft faces the U-shaped slot on the support plate, the support cylinder is started, the piston rod on the support cylinder is shortened, the support plate rotates, and both ends of the inflatable shaft are fixed in the slot and rise with the support plate, and the film roll is assembled in place, which is convenient for installing and replacing the film roll.

[0010] Preferably, the frame is also provided with a positioning rod rotatably connected to the frame, positioning plates are fixed on both sides of the positioning rod, and multiple positioning shafts are fixed between the two positioning plates. Positioning rollers are provided on the positioning shafts. Limiting shafts are fixed at positions corresponding to the positioning shafts on the frame, and limiting rollers are provided on the limiting shafts. Positioning cylinders are also symmetrically provided on both sides of the frame, and the piston rod ends of the positioning cylinders are connected to the positioning plates at corresponding positions. When the film is supplied to the bag making machine for use, the film passes through the limiting rollers and positioning rollers at the corresponding positions in turn. When the bag making machine stops, the positioning cylinder starts, the piston rod on the positioning cylinder shortens, the positioning plate rotates around the positioning rod, and the positioning roller rotates with the positioning plate, increasing the distance between the positioning roller and the limiting roller at the corresponding position. When the bag making machine stops, the film roll continues to release the film due to inertia. By increasing the distance between the positioning roller and the limiting roller at the corresponding position, the film is prevented from being loose and causing extrusion and overlapping. When the bag making machine starts, the piston rod on the positioning cylinder extends, and the distance between the positioning roller and the limiting roller at the corresponding position is reduced. When the unwinding motor starts, it cannot directly reach the specified speed. By storing part of the film between the positioning roller and the limiting roller at the corresponding position, pulling of the film is avoided.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. This device can make the speed of the film released from the film roll consistent with the speed of the film used by the bag making machine, avoid the bag making machine pulling the film, and avoid the large inertia of the film roll causing the film to be squeezed and overlapped.

[0013] 2. When the film is offset, the film position can be adjusted by moving the film roll to avoid deviation and ensure the quality of the packaging bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is another structural schematic diagram of the present invention from another angle;

[0017] In the figure: 1, frame; 2, sliding shaft; 3, bracket; 4, deviation correction motor; 5, threaded tube; 6, ultrasonic electric eye; 7, air expansion shaft; 8, film roll; 9, driven gear; 10, driving gear; 11, unwinding motor; 12, rotating shaft; 13, rotating gear; 14, detection gear; 15, potentiometer; 16, detection plate; 17, roller; 18, detection cylinder; 19, support plate; 20, support cylinder; 21, positioning rod; 22, positioning plate; 23, positioning shaft; 24, positioning roller; 25, limit shaft; 26, limit roller; 27, positioning cylinder; DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below with reference to the accompanying drawings: Example 1

[0019] like Figure 1 and Figure 2As shown, this embodiment discloses a uniform speed unloading device used on a bag making machine, including a frame 1, a bracket 3 is arranged on one side of the frame 1, a plurality of sliding shafts 2 are fixed on the bracket 3, the sliding shafts 2 pass through the frame 1 and are slidably connected to the frame 1, an ultrasonic electric eye 6 is also fixed on the frame 1, a deviation correction motor 4 is also fixed on the frame 1, a screw rod is fixed on the output end of the deviation correction motor 4, a threaded tube 5 is also fixed on the bracket 3, the end of the screw rod is arranged in the threaded tube 5 and is threadedly connected to the threaded tube 5, a rotating shaft 12 rotatably connected to the bracket 3 is also arranged on the bracket 3, a detection plate 16 is fixed on the rotating shaft 12, a detection cylinder 18 is also arranged on the bracket 3, the piston rod end of the detection cylinder 18 is connected to the detection plate 16, the end of the rotating shaft 12 is also connected to the potentiometer 15, and an air expansion shaft is also arranged on the bracket 3, and the air expansion shaft 7 is driven to rotate by the unwinding motor 11. The plastic film roll 8 is fixed on the inflatable shaft 7. After the film is pulled out, it is used for the bag making machine. The speed of the unwinding motor 11 is adjusted according to the film speed required by the bag making machine. The inflatable shaft 7 is rotated by the unwinding motor 11. The speed of the film pulled out from the film roll 8 is consistent with the use of the bag making machine. When the film moves, the edge of the film passes under the ultrasonic electric eye 6. When the film deviates, the correcting motor 4 is started, and the correcting motor 4 drives the screw rod to rotate. Since the screw rod is threadedly connected with the threaded tube 5, when the screw rod rotates, the threaded tube 5 moves in the direction of the screw rod, so that the bracket 3 moves with the threaded tube 5, thereby adjusting the position of the film roll 8, and making the edge of the film roll 8 pass under the ultrasonic electric eye 6 again, so as to correct the film. The deviation of the film ensures the stable operation of the bag making machine, and when the film roll 8 is gradually reduced, since the piston rod of the detection cylinder 18 is in an extended state, the end of the detection plate 16 is against the edge of the film roll 8. When the film roll 8 is gradually reduced, the detection plate 16 rotates around the rotating shaft 12, and the detection plate 16 drives the rotating shaft 12 to rotate. The rotating shaft 12 rotates, and the detection gear 14 rotates with the rotating shaft 12. The diameter of the film roll 8 can be confirmed by the potentiometer 15, thereby adjusting the output of the unwinding motor 11, thereby adjusting the speed of the inflatable shaft 7, thereby ensuring that the film released from the film roll 8 is consistent with the film used by the bag making machine, avoiding the bag making machine from pulling the film, and avoiding the large inertia of the film roll 8 causing the film to be squeezed and overlapped.

[0020] Wherein, the end of the detection plate 16 is also provided with a roller 17. The roller 17 contacts the film and rolls on the film to avoid scratching the film.

[0021] A rotating gear 13 is fixed to the end of the rotating shaft 12 , a potentiometer 15 is fixed on the bracket 3 , and a detection gear 14 is provided on the potentiometer 15 , which meshes with the aforementioned rotating gear 13 . Example 2

[0022] This embodiment discloses a uniform speed unloading device used on a bag making machine. Based on the structure and principle of the first embodiment, the support plates 19 rotatably connected to the support plates 3 are symmetrically arranged on both sides of the support 3 of this embodiment. The support plates 19 are provided with U-shaped slots for fixing the inflatable shaft 7. The end of the inflatable shaft 7 is fixed with a driven gear 9. The output end of the unwinding motor 11 is fixed with a driving gear 10. The driving gear 10 is meshed with the driven gear 9. The support cylinders 20 are symmetrically arranged on both sides of the support 3. The piston rod ends of the support cylinders 20 are connected to the support plates 19 at corresponding positions. When fixing the film roll 8, the film roll 8 is rolled to the support plate 19 position, the inflatable shaft 7 is facing the U-shaped slot on the support plate 19, the support cylinder 20 is started, the piston rod on the support cylinder 20 is shortened, the support plate 19 rotates, and the two ends of the inflatable shaft 7 are fixed in the slots and rise with the support plate 19. The film roll 8 is assembled in place, which is convenient for installing and replacing the film roll 8. Example 3

[0023] The present embodiment discloses a uniform speed unloading device used on a bag making machine. Based on the structure and principle of embodiment 1 or embodiment 2, a positioning rod 21 rotatably connected to the frame 1 is further provided on the frame 1 of the present embodiment, positioning plates 22 are fixed on both sides of the positioning rod 21, and a plurality of positioning shafts 23 are fixed between the two positioning plates 22, and positioning rollers 24 are provided on the positioning shafts 23. Limiting shafts 25 are fixed at positions corresponding to the positioning shafts 23 on the frame 1, and limiting rollers 26 are provided on the limiting shafts 25. Positioning cylinders 27 are symmetrically provided on both sides of the frame 1, and the piston rod ends of the positioning cylinders 27 are connected to the positioning plates 22 at corresponding positions. When the film is supplied to the bag making machine for use, the film passes through the limiting roller 26 and the positioning roller 24 at the corresponding position in turn. When the bag making machine stops, the positioning cylinder 27 starts, the piston rod on the positioning cylinder 27 shortens, the positioning plate 22 rotates around the positioning rod 21, and the positioning roller 24 rotates with the positioning plate 22, increasing the distance between the positioning roller 24 and the limiting roller 26 at the corresponding position. When the bag making machine stops, the film roll 8 continues to release the film due to inertia. By increasing the distance between the positioning roller 24 and the limiting roller 26 at the corresponding position, the film is prevented from being loose and causing extrusion and overlapping. When the bag making machine starts, the piston rod on the positioning cylinder 27 extends, and the distance between the positioning roller 24 and the limiting roller 26 at the corresponding position is reduced. When the unwinding motor 11 starts, it cannot directly reach the specified speed. By storing part of the film between the positioning roller 24 and the limiting roller 26 at the corresponding position, pulling of the film is avoided.

[0024] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the technical principles of the present invention. These changes, modifications, substitutions and variations should also be regarded as the scope of protection of the present invention.

Claims

1. A uniform speed unloading device used on a bag making machine, comprising a frame, characterized in that: A bracket is provided on one side of the frame, and a plurality of sliding shafts are fixed on the bracket, and the sliding shafts pass through the frame and are slidably connected to the frame. An ultrasonic electric eye is also fixed on the frame, and a correction motor is also fixed on the frame. A screw rod is fixed on the output end of the correction motor, and a threaded tube is also fixed on the bracket. The end of the screw rod is arranged in the threaded tube and is threadedly connected to the threaded tube. A rotating shaft rotatably connected to the bracket is also provided on the bracket, and a detection plate is fixed on the rotating shaft. A detection cylinder is also provided on the bracket, and the end of the piston rod of the detection cylinder is connected to the detection plate, and the end of the rotating shaft is also connected to a potentiometer. An inflatable shaft is also provided on the bracket, and the inflatable shaft is driven to rotate by the unwinding motor.

2. The uniform speed unloading device used on the bag making machine according to claim 1, characterized in that: A roller is also arranged at the end of the detection plate.

3. The uniform speed unloading device used on the bag making machine according to claim 1, characterized in that: A rotating gear is also fixed at the end of the rotating shaft. The potentiometer is fixed on the bracket. A detection gear is also arranged on the potentiometer. The detection gear is meshed with the aforementioned rotating gear.

4. The uniform speed unloading device used on the bag making machine according to claim 1, characterized in that: Support plates rotatably connected to the bracket are symmetrically arranged on both sides of the bracket, and U-shaped slots for fixing the inflatable shaft are arranged on the support plates. A driven gear is fixed to the end of the inflatable shaft, and a driving gear is fixed to the output end of the unwinding motor. The driving gear is meshed with the driven gear. Support cylinders are symmetrically arranged on both sides of the bracket, and the ends of the piston rods of the support cylinders are connected to the support plates at corresponding positions.

5. The uniform speed unloading device used on the bag making machine according to claim 1, characterized in that: The frame is also provided with a positioning rod rotatably connected to the frame, positioning plates are fixed on both sides of the positioning rod, and multiple positioning shafts are fixed between the two positioning plates. Positioning rollers are provided on the positioning shafts. Limiting shafts are fixed at positions corresponding to the positioning shafts on the frame, and limiting rollers are provided on the limiting shafts. Positioning cylinders are also symmetrically provided on both sides of the frame, and the piston rod ends of the positioning cylinders are connected to the positioning plates at corresponding positions.

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