Automatic correction device for curled packing material and filling machine

Abstract

The utility model discloses an automatic correction device for a curled packing material and a filling machine, and relates to the field of liquid food packaging. The automatic deviation rectifying device for the curled packing material comprises a rack, an automatic deviation rectifying module capable of clamping the packing material to rotate in a longitudinal conveying through hole in the automatic deviation rectifying module, a packing material transverse deviation detecting device and a control device. The automatic deviation rectifying module is mounted on the rack; a deviation rectifying roller set is controlled to rotate through a control device, the deviation rectifying roller set comprises an inner pressing wheel extruding the inner side face of the packing material and an outer roller making contact with the outer side face of the packing material, the contact face of the outer roller and the packing material is an arc face with an opening facing the inner pressing wheel, and the contact point of the inner pressing wheel and the packing material is located in the opening of the arc face. When the packing material is in a longitudinal walking state and deviates transversely, the inner pressing wheel and the outer rolling wheel rotate at the same time, the packing material rotates to conduct torsion compensation, and therefore torsion of the packing material is controlled within a certain range all the time, and the torsion compensation device has the advantages of being high in adjusting precision, short in needed adjusting time and capable of being suitable for the high-speed packing machine.

Description

Technical Field

[0001] The utility model relates to the field of liquid food packaging, in particular to an automatic deviation-correcting device for curled packaging materials and a filling machine. Background Art

[0002] In the field of liquid food (such as yogurt, juice) in small-volume packaging containers, continuous online filling is generally performed by filling machines, that is, on the filling machine, the rolled packaging materials are unfolded, sterilized, longitudinally sealed to form a tube and filled, and then transversely sealed and cut into independent packages. In order to ensure the reliability of longitudinal and transverse sealing of the packaging materials, the transverse offset of the packaging materials needs to be controlled during the movement of the packaging materials after unfolding on the filling machine.

[0003] CN208378024U discloses "an automatic deviation correction device for aluminum foil of ZB47 packaging machine" and CN211619497U discloses "an automatic deviation correction system for multi-column packaging machine". The former uses a motor or other driving mechanism to drive the packaging material conveying roller, and controls and adjusts the inclination angle of the conveying roller according to the position detection signal of the output film to change the lateral position of the packaging material during conveying. The latter directly drives the axial position of the packaging material unwinding shaft according to the material feeding position detection signal, generates lateral displacement, and thus changes the lateral position of the output material during feeding.

[0004] The patent with publication number CN 115432494A discloses an automatic deviation-correcting device for multiple rows of curled packaging materials, characterized in that it includes at least one deviation-correcting system, and rollers for the strip packaging materials to pass through are respectively arranged on the front and rear sides of the deviation-correcting system, and each deviation-correcting system is composed of two deviation-correcting mechanisms, and a row of strip packaging materials is penetrated inside each deviation-correcting mechanism, one of the deviation-correcting mechanisms is installed on a first sliding block that is slidingly arranged, and the other deviation-correcting mechanism is installed on a second sliding block that is slidingly arranged, and the first sliding block and the second sliding block can both slide in the transverse direction of the strip packaging materials under the drive of the adjustment mechanism, and the sliding actions of the two are independent of each other, and the deviation-correcting mechanism includes two sets of deviation-correcting modules that are arranged oppositely and at least one sensor connected to a PLC system; the two deviation-correcting mechanisms are arranged on the first sliding block that is slidingly arranged, and the second sliding block is arranged on the second sliding block that is slidingly arranged, and the first sliding block and the second sliding block can slide in the transverse direction of the strip packaging materials under the drive of the adjustment mechanism, and the sliding actions of the two slides are independent of each other, and the deviation-correcting mechanism includes two sets of deviation-correcting modules that are arranged oppositely and at least one sensor connected to a PLC system; the two deviation-correcting mechanisms are arranged on the second sliding block that is slidingly arranged, and ... The groups of correction modules are distributed on the left and right sides of the strip packaging material. Each group of correction modules includes a lower roller mechanism distributed up and down and an upper roller mechanism that can move up and down. The strip packaging material passes through the two, and there is an angle α between the outer diameter tangent of the rollers installed on the upper roller mechanism and the lower roller mechanism and the walking direction of the strip packaging material. When one group of upper roller mechanisms presses down the strip packaging material in a walking state, the strip packaging material produces a lateral displacement to one side of the outer diameter tangent direction of the roller; the sensor is set at the edge position of the strip packaging material, which is used to detect the actual offset of the strip packaging material and feed it back to the PLC system. The PLC system alternately controls the two groups of upper roller mechanisms to press down the strip packaging material, thereby realizing automatic adjustment of the actual offset of the strip packaging material.

[0005] The patent with publication number CN 113860045A discloses an automatic deviation-correcting device for strip curled packaging materials, which is characterized in that it includes: a deviation-correcting module, which is provided with two groups and distributed on the left and right sides of the strip packaging material, each group of the deviation-correcting modules includes a lower roller mechanism distributed up and down and an upper roller mechanism that can move up and down, the strip packaging material passes through the two, and there is an angle α between the outer diameter tangent of the rollers installed on the upper roller mechanism and the lower roller mechanism and the walking direction of the strip packaging material, when one group of the upper roller mechanisms presses down the strip packaging material in the walking state, the strip packaging material generates a lateral displacement to one side of the outer diameter tangent direction of the roller; at least one sensor connected to the PLC system, which is arranged at the edge position of the strip packaging material, for detecting the actual offset of the strip packaging material and feeding it back to the PLC system, and the PLC system alternately controls the two groups of upper roller mechanisms to press down the strip packaging material, so as to realize automatic adjustment of the actual offset of the strip packaging material.

[0006] The patent application with publication number CN107806845A filed by the applicant on March 16, 2018 discloses packaging materials, packaging materials transverse deviation detection methods and devices, and filling machines, which are used for continuous feeding and longitudinal and transverse sealing on the filling machine, and the packaging materials are provided with a horizontal reference parallel to the width direction of the packaging materials and at least one inclined detection line with a preset angle to the horizontal reference. In the utility model, since the horizontal reference and the inclined detection line are at a preset angle, when the packaging material is laterally offset, the distance between the horizontal reference and the inclined detection line changes at a fixed detection position. Since the packaging material moves at a uniform speed, the distance change can be reflected by the time from the horizontal reference to the inclined detection line detected by the detection device, thereby accurately calculating the transverse deviation. In the prior art, the deviation correction method and device are all indirectly adjusting the transverse position of the strip packaging material, with low adjustment accuracy and long adjustment time, which cannot be applied to high-speed packaging machines, especially, it is difficult to accurately control the torsion of the curled packaging material. Summary of the invention

[0007] The utility model aims to provide an automatic deviation-correcting device for curled packaging materials and a filling machine, so as to solve the problem in the prior art that the twisting of the curled packaging materials is difficult to be accurately controlled.

[0008] The technical solution adopted by the utility model is as follows.

[0009] The automatic deviation correction device for curled packaging materials comprises a frame, an automatic deviation correction module capable of clamping the packaging materials and rotating them in the longitudinal conveying through hole thereon, a packaging material transverse offset detection device, and a control device; the automatic deviation correction module and the packaging material transverse offset detection device are connected to the control device, and the automatic deviation correction module is installed on the frame. When the transverse offset of the longitudinally conveyed packaging material is transmitted to the control device, the control device learns that the packaging material is twisted, and the automatic deviation correction module rotates the packaging material in the longitudinal conveying through hole of the packaging material to correct the transverse offset of the packaging material.

[0010] As a preferred technical solution, the packaging material lateral displacement detection device includes a positioning mark detection device and an information collection and processing device. The positioning mark detection device is connected to the information collection and processing device, and the information collection and processing device is connected to the control device.

[0011] As a preferred technical solution, the positioning mark detection device includes an electric eye connected to the frame. The positioning mark is printed on the packaging material. The positioning mark printed on the packaging material is detected by the electric eye and the positioning mark signal is transmitted to the information collection and processing device; the information collection and processing device calculates the lateral offset of the packaging material according to the positioning mark signal, and sends the lateral offset to the control device.

[0012] As a preferred technical solution, the automatic correction module includes a fixed plate with a horizontal top surface, a correction frame, and a correction frame motion drive device; the correction frame can be rotatably mounted on the fixed plate;

[0013] The deflection correction frame is provided with a longitudinal conveying hole for packaging materials and a deflection correction roller group; the deflection correction frame motion driving device is connected to the deflection correction frame; the deflection correction roller group includes an outer roller and an inner pressure wheel;

[0014] The fixed plate and the deviation-correcting frame motion drive device are connected to the frame;

[0015] An outer roller in contact with the radial outer circumferential surface and the outer side surface of the packaging material is installed on one side of the correction frame, and an inner pressure wheel in contact with the radial outer circumferential surface and the inner side surface of the packaging material is provided in the longitudinal conveying hole of the packaging material, and the inner pressure wheel is connected to the correction frame; the contact surface between the outer roller and the packaging material is an arc surface with an opening toward the inner pressure wheel, and the contact point between the inner pressure wheel and the packaging material is located in the opening of the arc surface.

[0016] As an optimal technical solution, a number of vertical poles are provided at the bottom of the correction frame, and the central axis of each vertical pole is located on an arc surface, and the central axis of the arc surface is a longitudinal straight line; arc-shaped through holes are provided at corresponding positions of each vertical pole on the fixed plate, and the lower end of each vertical pole is located in the arc-shaped through hole closest to it; the center line of each arc-shaped through hole is located on the arc surface where the central axis of each vertical pole is located.

[0017] As a preferred technical solution, a retaining ring having a diameter greater than the width of the arc-shaped through hole is provided at the lower side of each upright pole. With this technical solution, the retaining ring has a blocking effect on one long side of the packaging material.

[0018] As a preferred technical solution, the correction frame includes a front side wall of the correction frame and a rear side wall of the correction frame; the left end of the front side wall of the correction frame and the rear side wall of the correction frame, and the right end of the front side wall of the correction frame and the right side wall of the correction frame are respectively connected by a longitudinal side wall of the correction frame;

[0019] An axial hole is longitudinally provided in the middle of the front side wall of the correcting frame, and a longitudinal axis is installed on the axial hole. A stop nut is threadedly installed on the front end of the longitudinal axis, and a compression spring is installed between the stop nut on the longitudinal axis and the front side wall of the correcting frame; an outer roller is installed on one side of the axial hole on the front side wall of the correcting frame, and a front guide wheel is installed on the other side; the rear end of the longitudinal axis is located in the longitudinal conveying through hole of the packaging material, and a transverse axis is installed on the rear end of the longitudinal axis, and the inner pressure wheel is installed on the transverse axis and located behind the outer roller; side guide wheels are respectively provided on the longitudinal side walls of each correcting frame and on the rear side of the inner pressure wheel between the two longitudinal side walls of the correcting frames; the outer roller, the front guide wheel and each side guide wheel are in contact with the outer side surface of the packaging material. The stop nut is used to adjust the pressure of the compression spring and to adjust the pressure applied by the inner pressure wheel on the packaging material. Since there is an angle between the outer diameter tangent of the inner pressure wheel and the outer roller and the traveling direction of the packaging material, when the packaging material is in a longitudinal traveling state, the packaging material is laterally displaced to one side of the outer diameter tangent direction of the roller, thereby allowing the deviation correction frame to drive the packaging material to rotate clockwise or counterclockwise.

[0020] As a preferred technical solution, the automatic deviation correction device for curled packaging materials also includes a transverse axis adjustment device, which includes a top screw, a top screw nut, and a top screw nut connecting plate. The front side of the transverse axis contacts a top screw perpendicular to the front side of the transverse axis, and the top screw is connected to the top screw nut. The top screw nut is connected to the front side wall of the deviation correction frame through the top screw nut connecting plate. The position of the twisted top screw on the top screw nut is adjusted by twisting the top screw, and the transverse axis is pushed to rotate along the longitudinal axis to adjust the angle between the tangent line of the outer diameter of the inner pressure wheel and the traveling direction of the packaging material.

[0021] As a preferred technical solution, the end of the transverse axis away from the inward pressure wheel contacts a top screw perpendicular to the transverse axis, and the top screw nut connecting plate is connected to the front side wall of the correction frame by connecting screws.

[0022] As a preferred technical solution, a retaining ring is coaxially arranged at the end of the outer roller close to the shaft hole. When the packaging material is in a longitudinal running state, the packaging material moves laterally to one side of the tangent direction of the roller outer diameter, so that one side of the packaging material is close to the retaining ring.

[0023] As a preferred technical solution, the motion drive device of the correction frame includes a transversely arranged screw and a screw drive device; one end of the screw is connected to the screw drive device, and the other end is hinged to the correction frame. Since the rotation of the correction frame is very small, it is difficult to control it by a motor. With this technical solution, the linear motion of the screw can cause a slight rotation of the correction frame, and the slight rotation of the correction frame can be controlled by a relatively easy and accurate horizontal motion, which is relatively accurate and has a relatively small error.

[0024] As a preferred technical solution, the screw drive device includes a frame plate, a push-pull disk, a transmission gear, and a stepper motor. The frame plate is connected to a horizontally arranged stepper motor, the frame plate is horizontally provided with a screw mounting hole, the screw is mounted on the screw mounting hole, the screw is threadedly engaged with the internal threaded hole of the push-pull disk, the push-pull disk is coaxially connected with a transmission gear, the transmission gear is engaged with the power output gear arranged on the output shaft of the stepper motor; the push-pull disk is connected to the frame plate, and the frame plate is connected to the frame. The movement of the screw can drive the correction frame to rotate.

[0025] As a preferred technical solution, the transmission gear diameter is larger than the power output gear diameter. With this technical solution, the precision requirement for the stepper motor can be reduced by further reducing the speed, and the slight rotation of the correction frame can be controlled more accurately with a smaller error.

[0026] As a preferred technical solution, the push-pull disc is connected to the frame plate through a thrust ball bearing. With this technical solution, the thrust ball bearing is used to fix the push-pull disc to prevent axial movement and also to reduce rotational friction resistance, so that the device can operate more reliably.

[0027] As a preferred technical solution, the frame plate includes a first longitudinal plate and a second longitudinal plate arranged on the side of the first longitudinal plate away from the deviation correction frame; the front end of the first longitudinal plate is connected to the front end or rear end of the second longitudinal plate through a connecting plate; a screw mounting hole is transversely arranged on the first longitudinal plate; a thrust ball bearing is connected to the first longitudinal plate and the second longitudinal plate, a push-pull plate is coaxially bolted with a thrust ball bearing coaxially, and a transmission gear is coaxially bolted to the front side of the push-pull plate; a stepper motor is installed on the second longitudinal plate, and a power output gear on the output shaft of the stepper motor is located between the first longitudinal plate and the second longitudinal plate. With this technical solution, the device can operate more stably and reliably.

[0028] As a preferred technical solution, a sensor for measuring the position of the screw is provided on the second longitudinal plate, and the center of the sensor passes through the central axis of the screw. With this technical solution, the slight rotation of the deviation correction frame can be accurately controlled.

[0029] In another aspect of the utility model, a filling machine is provided, comprising any one of the above-mentioned automatic deviation-correcting devices for curled packaging materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a diagram of the process of rolling the packaging material into a tube. Figure 1 The packaging material conveying direction is longitudinal.

[0031] Figure 2 It is a schematic diagram of the barcode printed on the packaging material, which is used to provide the lateral offset signal of the packaging material to the electric eye.

[0032] Figure 3 This is the control principle diagram of the utility model.

[0033] Figure 4It is a three-dimensional structural schematic diagram of a preferred embodiment of an automatic deviation-correcting device for curled packaging materials.

[0034] Figure 5 yes Figure 4 A partial enlarged view of part B.

[0035] Figure 6 yes Figure 4 A partial enlarged view of part C.

[0036] Figure 7 yes Figure 6 A partial enlarged view of part D.

[0037] Figure 8 yes Figure 4 A bottom view of the automatic deviation-correcting device for curled packaging materials is shown.

[0038] Fig. 9 yes Figure 8 A partial enlarged view of part E.

[0039] Fig.10 yes Figure 8 A partial enlarged view of part F.

[0040] Fig.11 yes Figure 4 A top view of the automatic deviation-correcting device for curled packaging materials is shown.

[0041] Fig.12 yes Fig.11 A partial enlarged view of part G.

[0042] Fig.13 yes Fig.11 A partial enlarged view of part H.

[0043] Fig.14 yes Fig.11 Section along line P-P'.

[0044] Fig.15 yes Fig.14 A partial enlarged view of part I.

[0045] Fig.16 The present invention is a structural schematic diagram of a preferred embodiment of an automatic deviation-correcting device for curled packaging materials.

[0046] Fig.17 yes Fig.16 A partial enlarged view of part J.

[0047] Fig.18 yes Fig.16 A partial enlarged view of part K.

[0048] Fig.19 The present invention is a structural schematic diagram of a preferred embodiment of an automatic deviation-correcting device for curled packaging materials.

[0049] Fig. 20 yes Fig.19 A partial enlarged view of the L part.

[0050] Fig.21 The present invention is a structural schematic diagram of a preferred embodiment of an automatic deviation-correcting device for curled packaging materials.

[0051] Fig. 22 yes Fig.21 A partial enlarged view of part M.

[0052] Fig.23 The present invention is a structural schematic diagram of a preferred embodiment of an automatic deviation-correcting device for curled packaging materials.

[0053] Fig.24 yes Fig.23 A local enlarged view of part N.

[0054] Among them: packaging material-1; deviation correction frame-2; stepper motor-3; power output gear-4; transmission gear-5; push-pull plate-6; screw-7; fixing plate-8; thrust ball bearing-9; sensor-10; sensor lead-101; inner pressure wheel-11; outer roller-12; compression spring-13; jack screw-14; jack screw nut-141; jack screw nut connecting plate-142; connecting screw-143; longitudinal channel-15; crimping device-16; frame-17; electric eye-18; lateral motion drive device-19; screw drive device-191; frame plate-1 92; longitudinal conveying hole for packaging materials - 20; arc-shaped through hole - 21; vertical rod - 22; retaining ring - 23; front side wall of the correction frame - 24; rear side wall of the correction frame - 25; longitudinal side wall of the correction frame - 26; front guide wheel - 27; side guide wheel - 28; longitudinal axis - 29; retaining head nut - 30; transverse axis - 31; retaining ring - 32; first longitudinal plate - 33; second longitudinal plate - 34; connecting plate - 35; roller - 36; roller - 36; upper forming ring - 37; correction device - 38; middle forming ring - 39; longitudinal seal - 40; lower forming ring - 41; connecting hinge - 42. DETAILED DESCRIPTION

[0055] Below, the utility model is further described in conjunction with the drawings and embodiments.

[0056] Example 1. Figure 1 As shown, Figure 1-15 As shown, the method for automatically correcting the curled packaging material includes the following steps:

[0057] The method for automatically correcting the curled packaging material is characterized by comprising the following steps:

[0058] Step 1: longitudinally convey the packaging material 1 through a packaging material longitudinal conveying through hole 20 located on the automatic deviation correction module, wherein the packaging material longitudinal conveying through hole 20 causes the two lateral ends of the packaging material 1 to be brought close to each other and curled into a cylinder;

[0059] Step 2: measuring the lateral deviation of the longitudinally conveyed packaging material and transmitting it to the control device;

[0060] Step 3: The control device controls the automatic deviation correction module to rotate the packaging material 1 in the packaging material longitudinal conveying through hole 20 according to the lateral deviation of the packaging material, thereby correcting the lateral deviation of the packaging material 1 .

[0061] In step 2, the positioning mark on the packaging material 1 is detected by the positioning mark detection device, and the positioning mark signal is transmitted to the information acquisition and processing device. The information acquisition and processing device calculates the lateral offset of the packaging material 1 according to the positioning mark signal, and the information acquisition and processing device sends the lateral offset to the control device.

[0062] The automatic deviation correction module includes a deviation correction roller group. In step 3, the control device controls the deviation correction roller group to rotate along a longitudinal straight line located in the longitudinal conveying hole 20 of the packaging material;

[0063] The deviation-correcting roller group includes an inner pressure wheel 11 which is pressed against the inner side surface of the packaging material 1, and an outer roller 12 which is in contact with the outer side surface of the packaging material 1. The contact surface between the outer roller 12 and the packaging material 1 is an arc surface with an opening toward the inner pressure wheel 11, and the extrusion point between the inner pressure wheel 11 and the packaging material is located in the opening of the arc surface. The control device controls the inner pressure wheel 11 and the outer roller 12 according to the lateral offset of the packaging material 1, and simultaneously clamps the packaging material to rotate along a longitudinal straight line located in the longitudinal conveying hole 20 of the packaging material, so that the packaging material 1 rotates in the longitudinal conveying hole 20 of the packaging material.

[0064] The inner pressure wheel and the outer roller jointly extrude the packaging material. When the lateral offset of the longitudinally conveyed packaging material is transmitted to the control device, the control device learns that the packaging material is twisted, and randomly controls the inner pressure wheel and the outer roller to rotate simultaneously along a longitudinal straight line located in the longitudinal conveying hole 20 of the packaging material. Through the friction between the inner pressure wheel and the packaging material, the packaging material is controlled to rotate to compensate for the twisting, so that the twisting of the packaging material is always controlled within a certain range. Since the contact surface between the outer roller and the packaging material is an arc surface with the opening facing the inner pressure wheel, the curled packaging material can rotate more flexibly. Since the contact area between the inner pressure wheel and the packaging material is very small, it does not affect the longitudinal transmission of the packaging material. The utility model can directly adjust the twisting of the strip packaging material, with high adjustment accuracy and short adjustment time. It can be applied to high-speed packaging machines and can accurately control the twisting of curled packaging materials.

[0065] The intersection lines of the radial outer peripheral surface of the inner pressing wheel 11 and the surface passing through the central axis of the inner pressing wheel 11 are two arcs, and the two arcs protrude outward; the curvature of the arc is smaller than the curvature of the contact surface between the outer roller 12 and the packaging material 1.

[0066] The size of the contact surface between the inner pressing wheel 11 and the packaging material 1 is adjusted by adjusting the position of the central axis of the inner pressing wheel 11 , thereby controlling the lateral displacement speed of the packaging material 1 .

[0067] In step 1, the positioning mark detection device includes an electric eye 18, which detects the positioning mark printed on the packaging material 1 and transmits the signal to the information collection and processing device, which calculates the lateral offset of the packaging material 1 according to the positioning mark signal, and transmits the lateral offset signal to the control device. The electric eye 18 is a color code electric eye.

[0068] The control device is a PLC. The lateral deviation signal of the vertically conveyed packaging material 1 is transmitted to the PLC.

[0069] PLC is connected to the human-machine interface. The human-machine interface provides a touch screen interface for human-machine interaction, setting operations and data display.

[0070] The automatic correction device 38 for curled packaging materials using the above-mentioned automatic correction method for curled packaging materials includes a frame 17, an automatic correction module that can clamp the packaging materials and rotate within the longitudinal conveying through hole 20 thereon, a packaging material lateral offset detection device, and a control device; the automatic correction module and the packaging material lateral offset detection device are connected to the control device, and the automatic correction module is installed on the frame 17.

[0071] The packaging material lateral displacement detection device comprises a positioning mark detection device and an information collection and processing device. The positioning mark detection device is connected to the information collection and processing device, and the information collection and processing device is connected to the control device.

[0072] The positioning mark detection device includes an electric eye 18 connected to the frame. The positioning mark is printed on the packaging material 1. The positioning mark printed on the packaging material 1 is detected by the electric eye 18 and the positioning mark signal is transmitted to the information collection and processing device; the information collection and processing device calculates the lateral offset of the packaging material according to the positioning mark signal, and transmits the lateral offset signal to the control device.

[0073] The automatic deviation-correcting module comprises a fixing plate with a horizontal top surface, a deviation-correcting frame, and a deviation-correcting frame motion driving device; the deviation-correcting frame can be rotatably mounted on the fixing plate.

[0074] The deflection correction frame is provided with a longitudinal conveying hole for packaging materials and a deflection correction roller group; the deflection correction frame motion driving device is connected to the deflection correction frame; the deflection correction roller group includes an outer roller and an inner pressure wheel.

[0075] The fixed plate and the deviation-correcting frame motion driving device are connected with the frame.

[0076] An outer roller in contact with the radial outer peripheral surface and the outer side of the packaging material is installed on one side of the correction frame, and an inner pressure wheel in contact with the radial outer peripheral surface and the inner side of the packaging material is arranged in the longitudinal conveying hole of the packaging material, and the inner pressure wheel is connected to the correction frame; the contact surface between the outer roller and the packaging material is an arc surface with the opening facing the inner pressure wheel, and the contact point between the inner pressure wheel and the packaging material is located in the opening of the arc surface. The control device controls the rotation of the correction roller group according to the lateral offset of the packaging material 1 to realize automatic correction of the curled packaging material.

[0077] Specifically, the automatic correction device 38 for curled packaging materials includes a frame 17, an automatic correction module, a positioning mark detection device, and a control device; the automatic correction module includes a fixed plate 8 with a horizontal top surface, and a correction frame 2, and the correction frame 2 is connected to a correction frame motion drive device 19; the correction frame 2 can be rotatably mounted on the fixed plate 8; the correction frame 2, the positioning mark detection device (i.e., the electric eye 18), and the correction frame motion drive device 19 are connected to the frame 17. A longitudinal conveying hole 20 for packaging materials is provided in the deflection correction frame 2. The packaging material 1 is a curled packaging material in the shape of a long strip and its horizontal cross section is a curve with both ends close to each other. The packaging material 1 passes vertically through the longitudinal conveying hole 20 for packaging materials. An outer roller 12 in contact with the radial outer peripheral surface and the outer side surface of the packaging material is installed on the front side of the deflection correction frame 2. An inner pressure wheel 11 in contact with the radial outer peripheral surface and the inner side surface of the packaging material is provided in the longitudinal conveying hole 20 for packaging materials. The inner pressure wheel 11 is connected to the deflection correction frame 2. The contact surface between the outer roller 12 and the packaging material 1 is an arc surface with an opening toward the inner pressure wheel 11, and the contact point between the inner pressure wheel 11 and the packaging material is located in the opening of the arc surface. The motion driving device 19 of the deflection correction frame is arranged on the left side of the fixed plate 8. The deflection correction frame 2 is in the shape of a "mouth", and its internal surrounding area forms a longitudinal conveying hole 20 for packaging materials.

[0078] When the packaging material 1 is conveyed longitudinally and the positioning mark detection device detects that the packaging material is laterally offset, the correction frame motion drive device 19 drives the correction frame 2 to rotate, and the inner pressure wheel 11 and the outer roller 12 clamp the packaging material 1 and rotate the packaging material in the longitudinal conveying hole 20 of the packaging material, so that the torsion of the packaging material 1 is always controlled within a certain range.

[0079] The positioning mark detection device includes an electric eye 18. A positioning mark is printed on the packaging material 1, and the positioning mark is a tilt detection line. The tilt detection line printed on the packaging material 1 is detected by the electric eye 18, and the positioning mark signal is transmitted to the information collection and processing device, and the information collection and processing device transmits the lateral offset to the control device.

[0080] Figure 2 It is a barcode printed on the packaging material and is used for the electric eye 18 to read.

[0081] The packaging material 1 is provided with a horizontal reference parallel to the width direction of the packaging material 1 and at least one tilt detection line which is at a preset angle to the horizontal reference. The method for measuring the lateral offset of the packaging material 1 is as follows:

[0082] The horizontal reference and tilt detection line of the moving packaging material 1 are detected at the position of the color mark electric eye 18, and the time interval t1 corresponding to the distance between the edge of the horizontal reference and the tilt detection line close to the horizontal reference, and the time interval t2 corresponding to the distance between the edge of the horizontal reference and the tilt detection line far from the horizontal reference are obtained. The lateral offset is calculated according to the time interval t1 and the time interval t2, the horizontal reference is the longitudinal offset detection barcode on the packaging material 1, and the decoding signal detected by the longitudinal offset detection barcode is used as the horizontal reference signal.

[0083] The lateral offset is calculated according to the time interval t1 and the time interval t2 using the following formula:

[0084]

[0085] Among them, X1 is the width of the tilt detection line, α is the preset angle between the horizontal reference and the tilt detection line, and L1 is the lateral reference amount, which is the distance between the intersection of the horizontal reference and the tilt detection line and the lateral displacement reference line. A method for detecting the lateral displacement of the packaging material is provided by detecting the barcode printed on the packaging material through a color-coded electric eye. The color-coded electric eye detects the tilt detection line printed on the packaging material and transmits the tilt detection line signal to the information access device. The information access device can read the tilt detection line signal and accurately calculate the lateral displacement of the packaging material. The information access device transmits the lateral displacement signal to the PLC. The PLC sends a pulse signal of movement to the power source stepper motor of the correction device according to the set value of the touch screen, and the correction device performs the correction action. For detailed working principles, see the text disclosed in the specific implementation method of CN 107806845A.

[0086] like Figure 3 As shown, the lateral displacement acquisition device also includes a signal transmission to the information collection and processing device, the tilt detection line printed on the packaging material 1 is detected by the electric eye 18 and the tilt detection line is transmitted to the information collection and processing device, the information collection and processing device reads the information of the electric eye 18 and calculates the lateral displacement of the packaging material 1, and the information collection and processing device transmits the lateral displacement signal to the control device. When the curled packaging material 1 is twisted, the color mark electric eye detects the tilt detection line printed on the packaging material and transmits the tilt detection line to the information collection and processing device, the information collection and processing device can read the color mark electric eye information and accurately calculate the lateral displacement of the packaging material, and the information collection and processing device transmits the lateral displacement signal to the control device, i.e., PLC.

[0087] There are three vertical rods 22 at the bottom of the deviation rectifying frame 2, and the central axes of the vertical rods 22 are located on an arc surface, and the central axis of the arc surface is a longitudinal straight line located in the longitudinal conveying through hole 20 of the packaging material; arc-shaped through holes 21 are provided at the corresponding positions of the vertical rods 22 on the fixing plate 8, and the lower ends of the vertical rods 22 are located in the arc-shaped through holes 21 closest to them; the central lines of the arc-shaped through holes 21 are located on the arc surface where the central axes of the vertical rods 22 are located. With this technical solution, under the limit of the arc-shaped through hole 21 on the lower end of the inner vertical rod 22, the deviation rectifying frame 2 can rotate. As Fig.10 shown, in this embodiment, the central axis of the arc surface is a longitudinal straight line, passing through point A in the longitudinal conveying through hole 20 of the packaging material. The deviation rectifying frame 2 rotates within the range of the longitudinal conveying through hole 20 of the packaging material with the rotation center A as the center to drive the packaging material to twist. The longitudinal conveying through hole 20 of the packaging material is a waist-shaped hole. The horizontal length of the longitudinal conveying through hole 20 is less than the horizontal length of the packaging material, and the longitudinal conveying through hole 20 of the packaging material makes the two transverse ends of the packaging material 1 approach each other and curl into a tube shape. The control device is a PLC, and the PLC is connected to a human-machine interface.

[0088] A retaining ring 23 with a diameter larger than the width of the arc-shaped through hole 21 is provided below the arc-shaped through hole 21 of each vertical rod 22. With this technical solution, the retaining ring 23 plays a role in blocking the left long side of the packaging material 1.

[0089] The deviation rectifying frame 2 is in a "mouth" shape, and the inner surrounded area forms the longitudinal conveying through hole 20 of the packaging material.

[0090] The deviation rectifying frame 2 includes a front side wall 24 of the deviation rectifying frame and a rear side wall 25 of the deviation rectifying frame; between the left end of the front side wall 24 of the deviation rectifying frame and the rear side wall 25, and between the right end of the front side wall 24 of the deviation rectifying frame and the right side wall of the deviation rectifying frame 2, they are respectively connected by a longitudinal side wall 26 of the deviation rectifying frame;

[0091] An axial hole is longitudinally provided in the middle of the front side wall 24 of the correcting frame, and a longitudinal axis 29 is installed on the axial hole. A stop nut 30 is threadedly installed on the front end of the longitudinal axis 29, and a compression spring 13 is installed between the stop nut 30 and the front side wall 24 of the correcting frame on the longitudinal axis 29; an outer roller 12 is installed on the left side of the axial hole on the front side wall 24 of the correcting frame, and a front guide wheel 27 is installed on the right side; the rear end of the longitudinal axis 29 is located in the longitudinal conveying hole 20 of the packaging material, and the rear end of the longitudinal axis 29 is installed with a transverse axis 31, and the inner pressure wheel 11 is installed on the transverse axis 31 and is located behind the outer roller 12; side guide wheels 28 are respectively provided on the rear side of the inner pressure wheel 11 on each longitudinal side wall 26 of the correcting frame and between the two longitudinal side walls 26 of the correcting frames; the outer roller 12, the front guide wheel 27, and each side guide wheel 28 are in contact with the outer side surface of the packaging material 1. The stopper nut 30 is used to adjust the pressure of the compression spring 13, and is used to adjust the pressure applied by the inner pressure wheel 11 on the packaging material 1. Since there is an angle between the outer diameter tangent of the inner pressure wheel 11 and the outer roller 12 and the running direction of the packaging material, when the packaging material is in a longitudinal running state, the packaging material is laterally displaced to one side of the roller outer diameter tangent direction, so that the deviation correction frame 2 can drive the packaging material to rotate clockwise or counterclockwise. The inner pressure wheel 11 and the outer roller 12 clamp the left side of the packaging material 1.

[0092] The automatic deviation-correcting device for curled packaging materials also includes a transverse axis adjustment device.

[0093] The transverse axis adjustment device includes a top screw 14, a top screw nut 141, and a top screw nut connecting plate 142. The front side of the transverse axis 31 contacts the top screw 14 perpendicular to the front side of the transverse axis 31. The top screw 14 is connected to the top screw nut 141, and the top screw nut is connected to the front side wall 24 of the deviation correction frame through the top screw nut connecting plate 142. The position of the twisted top screw 14 on the top screw nut 141 is adjusted by twisting the top screw 14, and the transverse axis 31 is driven to rotate along the longitudinal axis 29, and the angle between the tangent line of the outer diameter of the inner pressure wheel 11 and the running direction of the packaging material 1 is adjusted, thereby controlling the lateral displacement speed of the packaging material 1 to one side of the tangent line of the outer diameter of the inner pressure wheel 11.

[0094] The right end of the horizontal axis 31 contacts the top screw 14 which is perpendicular to the horizontal axis 31 .

[0095] The top screw nut connecting plate 142 is connected to the front side wall 24 of the deviation correction frame by connecting screws 143 .

[0096] A retaining ring 32 is coaxially arranged near the end of the shaft hole of the outer roller 12. When the packaging material is in a longitudinal running state, the packaging material is laterally displaced to one side of the tangent direction of the outer diameter of the roller, so that one side of the packaging material is close to the retaining ring 32. The retaining ring 32 is provided to achieve the limiting effect on the rotation of the packaging material 1.

[0097] The deviation correction frame motion driving device 19 comprises a transversely arranged screw rod 7 and a screw driving device 191 ; the left end of the screw rod 7 is connected to the screw driving device 191 , and the right end is hinged to the deviation correction frame 2 via a connecting hinge 42 .

[0098] The screw driving device includes a frame plate 192, a push-pull disk 6, a transmission gear 5, and a stepper motor 3. The frame plate 192 is connected to a stepper motor 3 arranged horizontally. The frame plate 192 is provided with a screw mounting hole horizontally. The screw 7 is installed on the screw mounting hole. The screw 7 is threadedly engaged with the internal threaded hole of the push-pull disk 6. The push-pull disk 6 is coaxially connected with a transmission gear 5. The transmission gear 5 is engaged with a power output gear 4 arranged on the output shaft of the stepper motor 3. The push-pull disk 6 is connected to the frame plate, and the frame plate 192 is connected to the frame 17. The movement of the screw 7 can drive the correction frame 2 to rotate. The stepper motor rotates the push-pull disk through the transmission of the large and small gears, and drives the screw 7 to move linearly through the thread transmission. The PLC sends a pulse signal of movement to the stepper motor 3 according to the setting value of the touch screen. The stepper motor 3 drives the correction frame 2 to rotate. The inner pressure wheel 11 and the outer roller 12 clamp the packaging material 1 and make the packaging material rotate in the longitudinal conveying hole 20 of the packaging material, so that the torsion of the packaging material 1 is always controlled within a certain range, and the correction action is performed.

[0099] The diameter of the transmission gear 5 is larger than that of the power output gear 4. By further reducing the speed, the precision requirement on the stepping motor 3 can be reduced, and the slight rotation of the correction frame 2 can be controlled more accurately with a smaller error.

[0100] The push-pull plate 6 is connected to the frame plate 192 through a thrust ball bearing 9.

[0101] The frame plate 192 includes a first longitudinal plate 33 and a second longitudinal plate 34 arranged on the right side of the first longitudinal plate 33; the front end of the first longitudinal plate 33 is connected to the front end of the second longitudinal plate 34 through a connecting plate 35; a screw mounting hole is horizontally provided on the first longitudinal plate 33; the thrust ball bearing 9 is connected to the first longitudinal plate 33 and the second longitudinal plate 34, and the thrust ball bearing 9 is coaxially bolted with a push-pull disk 6, and the front side of the push-pull disk 6 is coaxially bolted with a transmission gear 5; the stepper motor 3 is installed on the second longitudinal plate 34, and the power output gear 4 on the output shaft of the stepper motor 3 is located between the first longitudinal plate 33 and the second longitudinal plate 34.

[0102] A sensor 10 for measuring the position of the screw 7 is disposed on the second longitudinal plate 34 , and the center of the sensor 10 passes through the central axis of the screw 7 . The sensor 10 is externally connected to a control device via a sensor lead 101 .

[0103] like Figure 1As shown, the process diagram of the packaging material being rolled into a tube, the flat packaging material longitudinally passes through the roller 36 → upper forming ring 37 → correction device 38 → middle forming ring 39 → longitudinal sealing 40 → lower forming ring 41, a group of transition rollers and four groups of forming wheels, and finally rolled into a tube shape, wherein the serial number correction device 38 is the automatic correction device shown in this embodiment, and the electric eye 18 in this figure is a detection sensor for the deviation of the twisted tube, which is a color code electric eye. The packaging material 1 is transported longitudinally, and the upper forming ring 37 is provided with a curling device 16, and the curling device 16 is provided with a longitudinal channel 15; the packaging material passes through the longitudinal channel 15 to become a curled packaging material, and the curled packaging material is in the shape of a long strip and its horizontal cross section is a curve with two ends close to each other. The curled packaging material enters the longitudinal conveying hole 20 of the packaging material, and the correction device 38 starts to work. The electric eye 18 is arranged on the frame 17 and is located below the correction device 38.

[0104] Specifically, the stepper motor 3 rotates upon receiving the PLC instruction, and drives the large gear 5 to rotate through the small gear 4. The large gear 5 is bolted to the push-pull disk 6, and the push-pull disk 6 is threadedly meshed with the screw 7. The rotational motion of the push-pull disk 6 is converted into the linear motion of the screw 7 through the threaded meshing transmission. The screw 7 is bolted to the correction frame 2. The push-pull motion of the screw 7 can drive the correction frame 2 to rotate within the range of the waist-shaped hole with the rotation center A as the center point. The correction frame 2 drives the packaging material 1 to rotate, thereby adjusting the torsion amount of the packaging material. The thrust ball bearing 9 is used to fix the push-pull disk 6 to prevent axial movement and also to reduce the rotational friction resistance; the sensor 10 is used to determine the initial position of the screw 7. The linear motion of the screw 7 can cause a slight rotation of the correction frame 2, and the slight rotation of the correction frame 2 can be controlled by a relatively easy and accurate horizontal motion, which is relatively accurate and has a relatively small error. In the prior art device, the packaging material is twisted during the process of rolling into a tube, thereby affecting the molding quality. This embodiment can automatically correct the torsion of the packaging material during the process of rolling into a tube.

[0105] The filling machine adopts the above-mentioned automatic deviation-correcting device for curled packaging materials.

[0106] The automatic deviation correction method, the automatic deviation correction device and the filling machine for curled packaging materials of the present embodiment measure the lateral deviation of the packaging material conveyed longitudinally and convey it to the control device, wherein the packaging material is a curled packaging material in the shape of a long strip and its horizontal cross section is a curve with two ends close to each other; the deviation correction roller group is controlled to rotate by the control device, the deviation correction roller group includes an inner pressure wheel pressed against the inner side surface of the packaging material, and an outer roller in contact with the outer side surface of the packaging material, the contact surface between the outer roller and the packaging material is an arc surface with the opening facing the inner pressure wheel, and the contact point between the inner pressure wheel and the packaging material is located in the opening of the arc surface; when the packaging material is in a longitudinal walking state and has a differential lateral deviation, the inner pressure wheel and the outer roller rotate simultaneously, causing the packaging material to rotate for torsion compensation, thereby always controlling the torsion of the packaging material within a certain range, and having the characteristics of high adjustment accuracy and short adjustment time, and being suitable for high-speed packaging machines.

[0107] Example 2. Figure 16-18 As shown, the difference between this embodiment and embodiment 1 is that:

[0108] The lateral motion driving device 19 is arranged on the right side of the deviation correcting frame 2. The right end of the screw rod 7 is hinged to the screw driving device 191, and the left end of the screw rod 7 is hinged to the deviation correcting frame 2 through the connecting hinge 42.

[0109] The right side of the shaft hole on the front side wall 24 of the correction frame is equipped with an outer roller 12, and the left side is equipped with a front guide wheel 27; the left end of the horizontal axis 31 is in contact with the top screw 14 perpendicular to the horizontal axis 31. The positioning mark is a barcode printed on the packaging material. The barcode printed on the packaging material 1 is detected by an electric eye, and the barcode signal is transmitted to the control device, which calculates the lateral offset according to the barcode signal and moves the drive device laterally according to the lateral offset.

[0110] The frame plate 192 includes a first longitudinal plate 33 and a second longitudinal plate 34 arranged on the left side of the first longitudinal plate 33; the front end of the first longitudinal plate 33 is connected to the front end of the second longitudinal plate 34 through a connecting plate 35; a screw mounting hole is horizontally provided on the first longitudinal plate 33; the thrust ball bearing 9 is connected to the first longitudinal plate 33 and the second longitudinal plate 34, and the thrust ball bearing 9 is coaxially bolted with a push-pull disk 6, and the front side of the push-pull disk 6 is coaxially bolted with a transmission gear 5; the stepper motor 3 is installed on the second longitudinal plate 34, and the power output gear 4 on the output shaft of the stepper motor 3 is located between the first longitudinal plate 33 and the second longitudinal plate 34.

[0111] A sensor 10 for measuring the position of the screw 7 is disposed on the second longitudinal plate 34 , and the center of the sensor 10 passes through the central axis of the screw 7 .

[0112] Example 3. Figure 19-20 As shown, the difference between this embodiment and the first embodiment is that no sensor for measuring the position of the screw is provided on the side of the second longitudinal plate 34 close to the deviation correcting frame 2 .

[0113] Example 4. Figure 21-22 As shown, the difference between this embodiment and embodiment 3 is that no thrust ball bearing is provided on the frame plate 192 .

[0114] Example 5. Figure 23-24 As shown, the difference between this embodiment and the first embodiment is that: the right side of the shaft hole on the front side wall 24 of the correction frame is provided with an outer roller 12, and the left side is provided with a front guide wheel 27; the left end of the horizontal axis 31 is in contact with the top screw 14 perpendicular to the horizontal axis 31. The left end of the outer roller 12 is coaxially provided with a retaining ring 32. The inner pressure wheel 11 and the outer roller 12 clamp the right side of the packaging material 1.

[0115] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Automatic deviation correction device for curled packaging materials, characterized by: The invention comprises a frame (17), an automatic deviation correction module capable of clamping packaging materials and rotating in a longitudinal conveying through hole (20) thereon, a packaging material transverse deviation detection device, and a control device; the automatic deviation correction module and the packaging material transverse deviation detection device are connected to the control device, and the automatic deviation correction module is installed on the frame (17).

2. The automatic deviation-correcting device for curled packaging materials according to claim 1, characterized in that: The packaging material lateral displacement detection device comprises a positioning mark detection device and an information collection and processing device. The positioning mark detection device is connected to the information collection and processing device, and the information collection and processing device is connected to the control device.

3. The automatic deviation-correcting device for curled packaging materials according to claim 2, characterized in that: The positioning mark detection device comprises an electric eye (18) connected to a frame (17); a positioning mark is printed on the packaging material (1); the positioning mark printed on the packaging material (1) is detected by the electric eye (18) and a positioning mark signal is transmitted to an information acquisition and processing device; the information acquisition and processing device calculates a lateral offset of the packaging material according to the positioning mark signal and transmits the lateral offset to a control device.

4. The automatic deviation-correcting device for curled packaging materials according to claim 2, characterized in that: The automatic deviation correction module comprises a fixed plate (8) whose top surface is a horizontal plane, a deviation correction frame (2), and a deviation correction frame motion driving device (19); the deviation correction frame (2) can be rotatably mounted on the fixed plate (8); The deflection correction frame (2) is provided with a packaging material longitudinal conveying through hole (20) and a deflection correction roller group; the deflection correction frame movement driving device (19) is connected to the deflection correction frame (2); the deflection correction roller group includes an outer roller (12) and an inner pressure wheel (11); The fixing plate (8) and the deviation correction frame motion driving device (19) are connected to the frame (17); An outer roller (12) is installed on one side of the deviation correction frame (2) and contacts the radial outer peripheral surface and the outer side surface of the packaging material. An inner pressure wheel (11) is arranged in the longitudinal conveying hole (20) of the packaging material and contacts the radial outer peripheral surface and the inner side surface of the packaging material. The inner pressure wheel (11) is connected to the deviation correction frame (2). The contact surface between the outer roller (12) and the packaging material (1) is an arc surface with an opening facing the inner pressure wheel (11), and the contact point between the inner pressure wheel (11) and the packaging material is located in the opening of the arc surface.

5. The automatic deviation-correcting device for curled packaging materials according to claim 4, characterized in that: A plurality of vertical rods (22) are arranged at the bottom of the deviation correction frame (2), the central axis of each vertical rod (22) is located on an arc surface, and the central axis of the arc surface is a longitudinal straight line; an arc-shaped through hole (21) is arranged at a corresponding position of each vertical rod (22) on the fixing plate (8), and the lower end of each vertical rod (22) is located in the arc-shaped through hole (21) closest to it; and the center line of each arc-shaped through hole (21) is located on the arc surface where the central axis of each vertical rod (22) is located.

6. The automatic deviation-correcting device for curled packaging materials according to claim 5, characterized in that: A retaining ring (23) having a diameter greater than the width of the arc-shaped through hole (21) is provided at the lower side of each upright pole (22).

7. The automatic deviation-correcting device for curled packaging materials according to claim 5, characterized in that: The deflection correction frame (2) comprises a deflection correction frame front side wall (24) and a deflection correction frame rear side wall (25); the left end of the deflection correction frame front side wall (24) and the deflection correction frame rear side wall (25), and the right end of the deflection correction frame front side wall (24) and the right side wall of the deflection correction frame (2) are respectively connected via a deflection correction frame longitudinal side wall (26); An axial hole is longitudinally provided in the middle of the front side wall (24) of the deviation correction frame, a longitudinal axis (29) is installed on the axial hole, a stopper nut (30) is threadedly installed on the front end of the longitudinal axis (29), and a compression spring (13) is installed between the stopper nut (30) on the longitudinal axis (29) and the front side wall (24) of the deviation correction frame; an outer roller (12) is installed on one side of the axial hole on the front side wall (24) of the deviation correction frame, and a front guide wheel (27) is installed on the other side; the rear end of the longitudinal axis (29) is located at the packaging material In the longitudinal conveying through hole (20), a transverse axis (31) is sleeved on the rear end of the longitudinal axis (29), and the inner pressure wheel (11) is installed on the transverse axis (31) and is located behind the outer roller (12); a side guide wheel (28) is provided on each longitudinal side wall (26) of the correcting frame and on the rear side of the inner pressure wheel (11) between the two longitudinal side walls (26) of the correcting frame; the outer roller (12), the front guide wheel (27) and each side guide wheel (28) are in contact with the outer side surface of the packaging material (1).

8. The automatic deviation-correcting device for curled packaging materials according to claim 7, characterized in that: The curled packaging material automatic deviation correction device also includes a transverse axis adjustment device, which includes a top screw (14), a top screw nut (141), and a top screw nut connecting plate (142). The front side surface of the transverse axis (31) contacts the top screw (14) which is perpendicular to the front side surface of the transverse axis (31). The top screw (14) is connected to the top screw nut (141), and the top screw nut is connected to the front side wall (24) of the deviation correction frame through the top screw nut connecting plate (142).

9. The automatic deviation-correcting device for curled packaging materials according to claim 8, characterized in that: The end of the transverse axis (31) away from the inward pressure wheel (11) contacts a top screw (14) perpendicular to the transverse axis (31), and the top screw nut connecting plate (142) is connected to the front side wall (24) of the deviation correction frame through a connecting screw (143).

10. The automatic deviation-correcting device for curled packaging materials according to claim 7, characterized in that: A retaining ring (32) is coaxially arranged at the end of the outer roller (12) close to the shaft hole.

11. The automatic deviation-correcting device for curled packaging materials according to claim 4, characterized in that: The deviation correction frame motion driving device (19) comprises a transversely arranged screw rod (7) and a screw rod driving device (191); one end of the screw rod (7) is connected to the screw rod driving device (191), and the other end is hinged to the deviation correction frame (2).

12. The automatic deviation-correcting device for curled packaging materials according to claim 11, characterized in that: The screw driving device comprises a frame plate (192), a push-pull disk (6), a transmission gear (5), and a stepping motor (3); the frame plate (192) is connected to a stepping motor (3) arranged transversely; a screw mounting hole is arranged transversely on the frame plate (192); a screw (7) is mounted on the screw mounting hole; the screw (7) is threadedly engaged with an internal threaded hole of the push-pull disk (6); the push-pull disk (6) is coaxially connected to a transmission gear (5); the transmission gear (5) is engaged with a power output gear (4) arranged on an output shaft of the stepping motor (3); the push-pull disk (6) is connected to the frame plate; and the frame plate (192) is connected to a frame (17).

13. The automatic deviation-correcting device for curled packaging materials according to claim 12, characterized in that: The diameter of the transmission gear (5) is greater than the diameter of the power output gear (4).

14. The automatic deviation-correcting device for curled packaging materials according to claim 12, characterized in that: The push-pull plate (6) is connected to the frame plate (192) via a thrust ball bearing (9).

15. The automatic deviation-correcting device for curled packaging materials according to claim 14, characterized in that: The frame plate (192) comprises a first longitudinal plate (33) and a second longitudinal plate (34) arranged on the side of the first longitudinal plate (33) away from the deviation correction frame (2); the front end of the first longitudinal plate (33) is connected to the front end or rear end of the second longitudinal plate (34) through a connecting plate (35); a screw mounting hole is transversely arranged on the first longitudinal plate (33); a thrust ball bearing (9) is connected to the first longitudinal plate (33) and the second longitudinal plate (34); the thrust ball bearing (9) is coaxially bolted with a push-pull plate (6); the front side of the push-pull plate (6) is coaxially bolted with a transmission gear (5); the stepping motor (3) is mounted on the second longitudinal plate (34), and the power output gear (4) on the output shaft of the stepping motor (3) is located between the first longitudinal plate (33) and the second longitudinal plate (34).

16. The automatic deviation-correcting device for curled packaging materials according to claim 15, characterized in that: A sensor (10) for measuring the position of the screw (7) is provided on the second longitudinal plate (34), and the center of the sensor (10) passes through the central axis of the screw (7).

17. Filling machine, characterized in that: The invention comprises the automatic deviation-correcting device for curled packaging materials as described in any one of claims 1 to 16.

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