CN116374699A

CN116374699A - Coreless reel changer capable of automatically unreeling and automatically sticking tail

Info

Publication number: CN116374699A
Application number: CN202310447181.1A
Authority: CN
Inventors: 袁效军; 袁峰
Original assignee: Shandong Zongwei Mechanical Equipment Co ltd
Current assignee: Shandong Zongwei Mechanical Equipment Co ltd
Priority date: 2023-04-19
Filing date: 2023-04-19
Publication date: 2023-07-04

Abstract

The invention aims to provide an automatic unreeling and unreeling coreless reel changer with automatic tail sticking, which can avoid slipping of a plastic bag reel relative to a mandrel when the plastic bag reel is reeled, and can avoid the phenomenon that the inner layer is brought out by friction force caused by the extraction of the mandrel when the finished reel falls off; the winding machine comprises a winding machine supported by a bracket, and is characterized by comprising a main turnover shaft, a first mounting plate and a second mounting plate, wherein the main turnover shaft can not relatively rotate and penetrates through the first mounting plate and the second mounting plate, two winding machine components are arranged between the first mounting plate and the second mounting plate, and the two winding machine components are symmetrically distributed relative to the main turnover shaft.

Description

Coreless reel changer capable of automatically unreeling and automatically sticking tail

Technical Field

The invention relates to the technical field of winding equipment for plastic bag winding production, in particular to a coreless reel changer capable of automatically unreeling and sticking tails.

Background

Plastic bags are usually transported to the market in a roll form, each plastic bag roll is produced by rolling a long plastic bag after being cut off, the plastic bag roll is integrally cut off after being rolled into a plastic bag roll with a given specification, a new plastic bag roll is continuously rolled after being taken off, the process is usually carried out by a rolling and changing machine of the plastic bag roll, the basic structure is relatively mature, but the following problems still exist in the use process of factories, which affect the rolling and changing work:

in the process of changing the coil, when the new coil is established to continue winding, the inner coil is required to be fixed firstly, the new coil and the old coil (the finished coil) are pulled apart, meanwhile, the new coil and the mandrel are prevented from slipping in the winding process, the coil changing machine is required to have the functions of unreeling and unreeling, the existing equipment does not have the functions or only relies on friction force clamping of clamping plates at two sides, and the automatic unreeling and unreeling function is not practical.

In the rolling process of the plastic bag, slipping occurs in the whole rolling process of the plastic bag roll, the plastic bag roll rotates relative to a rolling mandrel to slip, the tail position of the rolled plastic bag roll deviates from a preset ending position, the deviation size cannot be determined (related to the number of slipping occurrence times and each sliding angle), the sticking label of the plastic bag roll can not be stuck automatically by a machine through the tail sticking work of fixing the tail at the outermost layer of the plastic bag roll, if the sticking label depends on manpower, each roll needs to be stuck after the ending position is found by human eyes, errors are easy to occur, the efficiency is low, the work is tired, moreover, the sticking is carried out by adopting standard labels manually, and the cost expenditure is increased by additionally purchasing the labels; in addition, in the reel changing process after the reel is completed, the mandrel needs to be pulled out from the center of the plastic bag reel, and the innermost layer reel of the plastic bag reel is partially pulled out due to friction in the pulling process between the mandrel and the plastic bag reel, so that the integral structure of the plastic bag reel is damaged.

Disclosure of Invention

Based on the state of the art, the invention aims to provide a coreless reel changer capable of automatically unreeling and winding and automatically sticking tails, which can avoid slipping of a plastic bag reel relative to a mandrel when the plastic bag reel is wound, and can avoid the phenomenon that the inner layer is brought out by friction force caused by the extraction of the mandrel when the finished reel falls off.

The technical scheme adopted by the invention is as follows: the coreless reel changer comprises a reel changer supported by a bracket, and is characterized by comprising a main turnover shaft, a first mounting plate and a second mounting plate, wherein the main turnover shaft can not relatively rotate and penetrates through the first mounting plate and the second mounting plate, two reel assemblies are arranged between the first mounting plate and the second mounting plate, and the two reel assemblies are symmetrically distributed relative to the main turnover shaft;

each winding machine assembly comprises a first clamping plate and a second clamping plate, wherein the first clamping plate is rotatably mounted on the second mounting plate through a first clamping plate mounting shaft, and the second clamping plate is rotatably mounted on the first mounting plate through a second clamping plate mounting shaft; the clamping strip cylinder fixing piece and the clamping strip mounting piece are arranged on the second clamping plate mounting shaft, the clamping strip cylinder fixing piece is fixed relative to the second clamping plate mounting shaft, the clamping strip mounting piece is arranged between the clamping strip cylinder fixing piece and the second clamping plate and can slide relative to the second clamping plate mounting shaft, and a clamping strip cylinder for pushing the clamping strip mounting piece to slide is arranged between the clamping strip cylinder fixing piece and the clamping strip mounting piece; the holding strip mounting piece is hinged with the holding strip towards the end face of the second clamping plate, the holding strip comprises two holding strips which are symmetrically distributed on two sides of the second clamping plate mounting shaft, the two holding strips are respectively located in a strip-shaped sliding groove which is formed in the surface of the second clamping plate mounting shaft and axially extends along the second clamping plate mounting shaft, the end part, close to the second clamping plate, of the strip-shaped sliding groove is formed into an inclined surface, the inner surface of the holding strip is attached to the surface of the second clamping plate mounting shaft after being transited by the inclined surface, and the two holding strips are kept in a state of being attached to the second clamping plate mounting shaft in parallel.

The winding motor mounting plate is further fixedly arranged on the main turning shaft and is adjacent to the first mounting plate, a first winding motor and a second winding motor are fixedly arranged on the winding motor mounting plate, a first driving shaft and a second driving shaft are further rotatably arranged between the first mounting plate and the second mounting plate, the first driving shaft is in power connection with the first winding motor, the second driving shaft is in power connection with the second winding motor, the first driving shaft drives a first clamping plate mounting shaft and a second clamping plate mounting shaft of one winding machine component to synchronously rotate through a transmission component, and the second driving shaft drives a first clamping plate mounting shaft and a second clamping plate mounting shaft of the other winding machine component to synchronously rotate through the transmission component. Specifically, the first mounting plate is provided with two groups of transmission assemblies which are respectively connected with the first driving shaft and the second driving shaft in a transmission way; and the second mounting plate is also provided with two groups of transmission assemblies which are respectively connected with the first driving shaft and the second driving shaft in a transmission way. The driving belt wheel is assembled on the first driving shaft or the second driving shaft in a non-rotatable mode, the driven belt wheel is assembled on the first clamping plate installation shaft or the second clamping plate installation shaft in a non-rotatable mode, and the driving belt is assembled between the driving belt wheel and the driven belt wheel to achieve power transmission of the driving belt wheel and the driven belt wheel. Alternatively, the belt tensioner can further comprise a tensioning wheel, wherein the tensioning wheel is fixedly arranged on the first mounting plate or the second mounting plate through a rotating shaft, and the tensioning wheel is matched with the driving belt to provide tensioning force for the driving belt.

The first clamping plate mounting shaft is rotatably mounted on the second mounting plate, one end of the first clamping plate, which is far away from the second mounting plate, is mounted on the first clamping plate in a non-rotatable manner, and one end of the first clamping plate, which is close to the second mounting plate, is in power connection with the transmission assembly; the first clamping plate comprises a sleeve part and a clamping plate part, the sleeve part is assembled on a first clamping plate mounting shaft, a spring is sleeved on the first clamping plate mounting shaft, and the spring is abutted between the second mounting plate and the sleeve part; the sleeve part is also provided with a bearing flange in an axial limiting manner, an air cylinder is arranged between the bearing flange and the second mounting plate, and the air cylinder can push the second mounting plate to move forwards and backwards along the axial direction of the winding machine component through the bearing flange.

The second clamping plate mounting shaft is provided with a hollow channel, the second clamping plate mounting shaft is rotatably mounted on the first mounting plate through a transmission shaft, one end of the transmission shaft does not rotatably extend into the hollow channel, and the other end of the transmission shaft is in transmission connection with the transmission assembly; and a path for supplying air to the hollow channel is arranged in the transmission shaft. The hollow channel is internally provided with a mandrel assembly which can extend out of and retract back from the hollow channel, the mandrel assembly comprises a mandrel, a hollow push tube, a mandrel limiting seat, a mandrel push seat and a mandrel return spring, the mandrel limiting seat is positioned in the hollow channel and is fixed in position, and the mandrel limiting seat can be sleeved on the hollow push tube in a relatively sliding manner; the mandrel pushing seat is arranged in the hollow channel in a sliding manner, and is fixedly sleeved at the tail end of the hollow pushing tube; a mandrel reset spring is sleeved between the mandrel pushing seat and the mandrel limiting seat on the hollow pushing tube; the core shaft is made of flexible materials without elasticity, the front end of the core shaft is fixedly connected with the front end of the hollow push tube, the rear end of the core shaft is fixedly connected with the core shaft limiting seat, an annular cavity is formed between the core shaft and the hollow push tube, and the front end of the hollow push tube is provided with an air hole which is communicated with the annular cavity and the internal channel of the hollow push tube.

Preferably, the front end of the hollow push tube is blocked, the outer peripheral surface of the front end is provided with a fixing part matched with the mandrel, the front end of the mandrel is provided with a matching part, and the matching part is fixedly connected with the fixing part in a sealing way; and the peripheral wall of the mandrel is smoothly transited to the matching part radially inwards.

Further, one end of the main turning shaft is in power connection with the main turning motor, a distance adjusting hand wheel is arranged at the other end of the main turning shaft and screwed into the main turning shaft through a threaded rod, and the distance adjusting hand wheel is fixed with the axial position of the end part of the main turning shaft. The two sides of the second mounting plate are respectively and fixedly provided with a main overturning shaft mounting seat, the main overturning shafts penetrate through the two main overturning shaft mounting seats, a strip-shaped pin hole extending along the axial direction is formed in the position, corresponding to the main overturning shaft mounting seat, of the main overturning shaft, a transmission thread cylinder is arranged in an inner cavity of the main overturning shaft, a groove is formed in the side face of the transmission thread cylinder, and a key groove is formed in the inner peripheral surface of the main overturning shaft mounting seat; the key penetrates through the strip-shaped pin hole, and two sides of the key are respectively accommodated in a key groove of the main overturning shaft mounting seat and a groove of the transmission thread cylinder; the threaded rod is in threaded fit with the inside of the transmission threaded cylinder.

The technical scheme of the invention has the following advantages:

1. through the design of the fork-shaped holding strip, the plastic bag roll can be automatically clamped during rolling, so that the new roll and the old roll are convenient to tear off, and the new roll can be prevented from slipping during the initial rolling; the friction force applied to the two side surfaces of the plastic bag rolls by the first clamping plate and the second clamping plate which rotate synchronously is matched, so that the relative sliding rotation of the plastic bag rolls during rolling is effectively prevented, the fixing of the tail position of each plastic bag roll during rolling is ensured, the tail of the plastic bag rolls is bonded by matching with a label or a tape mechanical arm fixed point, and the labor force is saved;

2. the ending position of the plastic bag roll is fixed, so that an adhesive tape can be used for replacing a standard label (if the ending position is not fixed, the manual adhesive tape bonding obviously increases labor complexity due to the cutting operation of the adhesive tape and the like), and the cost expenditure increased due to the label purchasing is saved;

3. the air sac type mandrel replaces the traditional metal mandrel, so that the friction force between the outer surface of the mandrel and the inner wall surface of the middle gap of the plastic bag roll can be increased by means of gas expansion filling, and slipping is avoided; and the mode that the mandrel is gradually retracted can avoid adverse effect on the shape of the plastic bag roll caused by friction force when the metal mandrel is retracted.

Drawings

FIG. 1 is a schematic view of the overall frame structure of the reel changer of the present invention;

FIG. 2 is a schematic view of the overall structure of the reel changer of the present invention;

FIG. 3 is a schematic view II of the overall structure of the reel changer assembly of the present invention;

FIG. 4 is a schematic view of the overall structure of the reel changer of the present invention, view three;

FIG. 5 is a schematic diagram of the two clamping plates of the reel changer of the present invention in mating relationship;

FIG. 6 is a schematic view of the assembled state of two clamping plate assemblies of the reel changer of the present invention;

FIG. 7 is a schematic view of a first clamping plate assembly of the reel changer of the present invention;

FIG. 8 is a schematic illustration of a second clamping plate assembly of the reel changer of the present invention shown in an exploded view;

FIG. 9 is a schematic illustration of a second clamping plate assembly of the reel changer of the present invention shown in an exploded view;

FIG. 10 is a schematic structural view of a mandrel assembly in a reel changer according to the present invention, wherein (a) is a schematic structural view of the mandrel assembly as a whole, and (b) is a schematic structural view of the mandrel assembly as a cross section;

FIG. 11 is a split view of the mounting structure of the distance-adjusting hand wheel in the reel changer of the present invention;

in the figure: 1. a first bracket, 2, a second bracket, 3, a reel changer, 4, a gravity tension component, 5, a main turning shaft, 6, a first mounting plate, 7, a second mounting plate, 8, a main turning motor, 9, a winding motor mounting plate, 10, a first winding motor, 11, a second winding motor, 12, a distance adjusting hand wheel, 13, a first driving shaft, 14, a second driving shaft, 15, a driving belt wheel, 16, a driven belt wheel, 17, a tension wheel, 18, a driving belt, 19, a first clamping plate, 20, a second clamping plate, 21, a first cylinder, 22, a second cylinder, 23 and a bearing flange, 24, a first clamping plate mounting shaft, 25, a spring, 26, a second clamping plate mounting shaft, 27, a clamping strip mounting piece, 28, a clamping strip cylinder fixing piece, 29, a first clamping strip cylinder, 30, a second clamping strip cylinder, 31, a clamping strip, 32, a gap, 33, a strip-shaped chute, 34, an inclined plane, 35, a mandrel, 36, an air tap, 37, a transmission shaft, 38, a hollow push tube, 39, an air hole, 40, a mandrel push seat, 41, a mandrel limit seat, 42, a mandrel return spring, 43, a threaded rod, 44, a main overturning shaft mounting seat, 45, a key slot, 46, a strip-shaped pin hole, 47, a transmission threaded cylinder, 48 and a key.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or imply that the devices or elements being referred to must be oriented or operated in a particular orientation and are not intended to be limiting. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Fig. 1 is a schematic diagram of an overall frame structure of a reel changer according to the present invention, as shown in the drawing, a first bracket 1 and a second bracket 2 are respectively disposed on the left and right sides of the automatic unreeling and automatic tail-sticking coreless reel changer, the first bracket 1 and the second bracket 2 respectively support the left and right ends of the reel changer 3 through bearings, and support the right and left ends of the reel changer by a bracket structure to fit with other matched machine processes, and the automatic unreeling and tail-sticking coreless reel changer further comprises a gravity tensioning assembly 4, wherein the gravity tensioning assembly 4 is a trapezoid structure composed of a plurality of side-by-side short rods, and is hinged on a cross rod between the first bracket 1 and the second bracket 2, and when the automatic unreeling and unreeling reel changer is operated, a long plastic bag winds around the plurality of side-by-side short rods and then swings back to the reel changer 3 under the action of gravity of the gravity tensioning assembly 4 around a hinge point thereof.

The overall structure of the reel changer 3 will be further described with reference to fig. 2-4, wherein fig. 2 is a schematic view of the overall structure of the reel changer of the present invention, fig. 3 is a schematic view of the overall structure of the reel changer of the present invention, fig. 4 is a schematic view of the overall structure of the reel changer of the present invention; as shown in the figure, the reel changer 3 comprises a main turnover shaft 5, a first mounting plate 6, a second mounting plate 7, and two reel assemblies which are symmetrically or centrosymmetrically distributed relative to the main turnover shaft 5 and are mounted through the first mounting plate 6 and the second mounting plate 7, wherein the first mounting plate 6 and the second mounting plate 7 are assembled with the main turnover shaft 5 in a non-rotatable manner, one end of the main turnover shaft 5 is connected with the main turnover motor 8 through a coupling power, so that the main turnover shaft 5 rotates to drive the whole reel changer 3 to rotate around the main turnover shaft 5 under the driving of the main turnover motor 8, and the position turnover of the two reel assemblies is realized. Referring to fig. 2, a winding motor mounting plate 9 is further fixedly disposed on the main turning shaft 5 and adjacent to the first mounting plate 6, the winding motor mounting plate 9 is used for fixedly mounting a first winding motor 10 and a second winding motor 11, and the first winding motor 10 and the second winding motor 11 respectively drive a winding machine component to work. The end part of the main turnover shaft 5 far away from the main turnover motor 8 is provided with a distance adjusting hand wheel 12, and the distance adjusting hand wheel 12 is rotated to adjust the relative position of the second mounting plate 7 on the main turnover shaft 5 within a certain range, so as to adjust the distance between two working clamping plates in the winding machine component.

Referring to fig. 3 and 4, a first driving shaft 13 and a second driving shaft 14 are rotatably installed between the first mounting plate 6 and the second mounting plate 7 through bearings, the first driving shaft 13 is in power connection with the first winding motor 10, and the second driving shaft 14 is in power connection with the second winding motor 11. Two sets of transmission components are arranged on the first mounting plate 6 and the second mounting plate 7, when the first driving shaft 13 is driven to rotate by the first winding motor 10, the left end and the right end of the first driving shaft 13 respectively drive one set of transmission components on the first mounting plate 6 and the second mounting plate 7 to act, and the transmission components on the first mounting plate 6 and the transmission components on the second mounting plate 7 respectively drive two clamping plate components of the winding machine component to rotate, so that synchronous rotation of the two clamping plate components in each winding machine component is realized.

Referring to fig. 4, taking the first driving shaft 13 and the second mounting plate 7 as an example, the transmission assembly includes a driving pulley 15, a driven pulley 16 and a driving belt 18, wherein the driving pulley 15 is assembled on the first driving shaft 13 in a non-rotatable manner, the driven pulley 16 is assembled on the mounting shaft of the first clamping plate or the second clamping plate in a non-rotatable manner, and the driving belt 18 is assembled between the driving pulley 15 and the driven pulley 16 to realize power transmission between the driving pulley and the driven pulley 16. Alternatively, the transmission assembly further comprises a tensioning wheel 17, the tensioning wheel 17 is fixedly mounted on the first mounting plate 6 or the second mounting plate 7 through a rotating shaft, and the tensioning wheel 17 is matched with the transmission belt 18 to provide tensioning force of the transmission belt 18. When the first winding motor 10 drives the first driving shaft 13 to rotate, the first driving shaft 13 synchronously drives the two groups of transmission components on the first mounting plate 6 and the second mounting plate 7 to move, so that driven pulleys of the two groups of transmission components respectively drive the mounting shafts of clamping plates in one winding machine component to rotate, and synchronous rotation of two clamping plates of the same winding machine component is realized. Similarly, the second driving shaft 14 operates in the same manner as the first driving shaft 13, and will not be described here again.

Fig. 5 is a schematic diagram of the fit relationship between two clamping plates of the reel changer according to the present invention, wherein a first clamping plate 19 and a second clamping plate 20 are respectively installed on one side, and are abutted by a mandrel, and a plastic bag roll is wound on the mandrel. Fig. 6 is a schematic structural diagram of an assembled state of two clamping plate assemblies of the reel changer according to the present invention, fig. 7 is a schematic structural diagram of a first clamping plate assembly of the reel changer according to the present invention, in the illustrated embodiment, a first clamping plate 19 is mounted on the second mounting plate 7, and specifically includes a first clamping plate 19 and a first clamping plate mounting shaft 24, the first clamping plate mounting shaft 24 is rotatably mounted on the second mounting plate 7, one end of the first clamping plate mounting shaft is fixedly connected with the driven pulley 16, the other end of the first clamping plate mounting shaft is mounted on the first clamping plate 19 in a non-rotatable manner, the first clamping plate 19 includes a sleeve portion and a clamping plate portion, the sleeve portion is mounted on the first clamping plate mounting shaft 24, for example, the sleeve portion and the first clamping plate mounting shaft 24 is locked and rotated by a spline fit along an axial direction, and a spring 25 is further sleeved on the first clamping plate mounting shaft 24, and the spring 25 is compressively abutted between the second mounting plate 7 and the sleeve portion. Referring to fig. 6, the first clamping plate assembly further comprises a first air cylinder 21 and a second air cylinder 22 fixedly installed on the second mounting plate 7, piston shaft ends of the first air cylinder 21 and the second air cylinder 22 are respectively and fixedly connected to two sides of a bearing flange 23, the bearing flange 23 is rotatably sleeved on the sleeve part, the axial relative position of the bearing flange 23 and the sleeve part is restrained by a limiting piece such as a nut, and the bearing flange 23 can be pushed to move in an axial telescopic manner along the winding machine assembly by controlling the first air cylinder 21 and the second air cylinder 22, so that the first clamping plate 19 is driven to be close to or far away from the second clamping plate 20, and the width of a plastic bag roll wound between the first clamping plate 19 and the second clamping plate 20 is adapted.

As shown in fig. 8 and 9, fig. 8 is a first structural exploded view of a second clamping plate assembly of the reel changer according to the present invention, and fig. 9 is a first structural exploded view of a second clamping plate assembly of the reel changer according to the present invention; the second clamping plate assembly comprises a second clamping plate 20 and a second clamping plate mounting shaft 26, wherein the second clamping plate mounting shaft 26 is a hollow shaft body, one end of the second clamping plate mounting shaft 26 is fixedly provided with the second clamping plate 20, the other end of the second clamping plate is assembled with a transmission shaft 37 in a non-rotatable manner, specifically, the surface of the transmission shaft 37 is provided with a key groove, the inner peripheral surface of the end part of the second clamping plate mounting shaft 26, which is close to the transmission shaft 37, is also provided with a key groove, and the transmission shaft 37 can drive the second clamping plate mounting shaft 26 to rotate through the key groove; the end of the transmission shaft 37, which is far from the second clamping plate mounting shaft 26, penetrates through the first mounting plate 6 and is fixedly assembled with the driven pulley 16. Referring to fig. 8, a holding cylinder fixing member 28 is fixedly installed on the second clamping plate installation shaft 26, a holding installation member 27 is also slidably installed between the holding cylinder fixing member 28 and the second clamping plate 20, a driving cylinder is installed between the holding cylinder fixing member 28 and the holding installation member 27, the holding installation member 27 can be driven by the cylinder to slide along the second clamping plate installation shaft 26, and specifically, a first holding cylinder 29 and a second holding cylinder 30 are respectively arranged between the holding cylinder fixing member 28 and the holding installation member 27 and on two sides of the second clamping plate installation shaft 26; the clamping strip 31 is hinged to the end face of the clamping strip mounting member 27, which faces the second clamping plate 20, the clamping strip 31 comprises two clamping strips symmetrically distributed on two sides of the second clamping plate mounting shaft 26, the two clamping strips 31 are respectively located in a strip-shaped sliding groove 33 formed in the surface of the second clamping plate mounting shaft 26 and axially extending along the surface, and the two clamping strips 31 can slide back and forth in the strip-shaped sliding groove 33 under the driving of the clamping strip mounting member 27. A gap 32 is arranged on the second clamping plate 20 at a position corresponding to the clamping strip 31, and the gap 32 is used for the clamping strip 31 to extend out of the second clamping plate 20; referring to fig. 8, the end of the bar chute 33 adjacent to the second clamping plate 20 is formed as a slope 34, the slope 34 makes the depth of the rear section of the bar chute 33 shallow or makes the bar chute 33 transition to disappear, and when the clamping strip 31 slides along the bar chute 33 to the slope 34, the inner surface of the clamping strip 31 is attached to the surface of the second clamping plate mounting shaft 26 after transition via the slope 34, so that the two clamping strips 31 are kept in a state of being attached in parallel to the second clamping plate mounting shaft 26.

Referring to fig. 9, a spindle assembly is disposed within the interior space of the second cleat mounting shaft 26. FIG. 10 is a schematic structural view of a mandrel assembly in a reel changer according to the present invention, wherein (a) is a schematic structural view of the mandrel assembly as a whole, and (b) is a schematic structural view of the mandrel assembly as a cross section; the mandrel assembly is described in detail below in conjunction with fig. 9 and 10: the hollow push tube comprises a hollow push tube 38, wherein the outside of the hollow push tube 38 is coated with a mandrel 35, the mandrel 35 is made of flexible materials without elasticity, such as rubber doped with nylon ropes or woven bags, the front end of the mandrel 35 is fixedly connected with the front end of the hollow push tube 38, the rear end of the mandrel 35 is fixedly connected with a mandrel limiting seat 41, the mandrel limiting seat 41 is slidably sleeved on the hollow push tube 38, and the front end of the hollow push tube 38 is provided with an air hole 39 which communicates the inside of the hollow push tube with an annular cavity formed by the mandrel 35 and the hollow push tube 38; the outer peripheral surface of the mandrel spacing seat 41 is attached to the inner wall surface of the inner channel of the second clamping plate mounting shaft 26, and the mandrel spacing seat 41 and the second clamping plate mounting shaft 26 are locked in relative positions by screws; the rear end of the hollow push tube 38 is fixedly sleeved with a mandrel push seat 40, the hollow push tube 38 is sleeved with a mandrel return spring 42 between the mandrel push seat 40 and a mandrel limit seat 41, and the outer circumferential surface of the mandrel push seat 40 is in sealing fit with the inner wall surface of the inner channel of the second clamping plate mounting shaft 26, so that the mandrel push seat 40 can be used as a piston to drive the hollow push tube 38 to move back and forth. Referring to fig. 8 and 9, the transmission shaft 37 is also a hollow shaft, the end of the transmission shaft is provided with an air tap 36, air is supplied into the hollow channel of the second clamping plate mounting shaft 26 through the air tap 36, the air pressure can compress the mandrel return spring 42 to push the hollow push tube 38 to move forwards, and air enters the annular cavity inside the mandrel 35 through the air hole 39, so that the mandrel 35 is in a filling state and extends outwards along with the movement of the front end of the hollow push tube 38 until the total length of the structure of the mandrel 35 is reached, and when the air tap 36 discharges air, the mandrel return spring 42 pushes the mandrel push seat 40 to move backwards, the mandrel push seat 40 drives the hollow push tube 38 to retract backwards, and the front end of the hollow push tube 38 can drive the front end of the mandrel 35 to retract inwards continuously to shorten the whole filling length.

In a specific embodiment, the front end of the hollow push tube 38 is plugged, and a fixing portion is disposed on the outer peripheral surface of the front end and is matched with the mandrel 35, a matching portion is formed at the front end of the mandrel 35, and the matching portion and the fixing portion are fixedly connected in a sealing manner or directly bonded in a sealing manner through screws so as to connect the front end of the mandrel 35 and the front end of the hollow push tube 38 in a sealing manner; and the peripheral wall of the mandrel 35 smoothly transits to the matching part radially inwards, when the matching part is driven by the hollow push tube 38 to retract backwards, the peripheral wall of the mandrel 35 gradually contracts radially inwards along with the retraction movement of the matching part, so that the whole length of the mandrel 35 becomes shorter gradually, and obviously, when the matching part is driven by the hollow push tube 38 to extend forwards, the peripheral wall of the mandrel 35 is pushed by the matching part to expand gradually radially outwards from the contracted state, so that the whole length of the mandrel 35 is increased.

The reel changer of the present invention has two means for adjusting the distance between the first clamping plate 19 and the second clamping plate 20, respectively, by means of cylinders, as shown in the embodiment of the drawings, by pushing and pulling the first clamping plate 19 in the single reel assembly to get close to or far from the second clamping plate 20 by means of the first cylinder 21 and the second cylinder 22, so as to adjust the distance between the two; in addition, the relative axial position of the second mounting plate 7 and the main turning shaft 5 can be adjusted by rotating the distance adjusting hand wheel 12, so that the positions of the first clamping plates 19 of the two winding machine assemblies are adjusted along with the position adjustment of the second mounting plate 7, winding work with different widths can be adapted in a larger range, and the universality of equipment is improved. Specifically, fig. 11 shows an embodiment of a matching manner of a distance adjusting hand wheel 12 and a main turning shaft 5, referring to fig. 11, in the roll changer according to the invention, a separation diagram of a distance adjusting hand wheel mounting structure is provided, two main turning shaft mounting seats 44 are sleeved on the main turning shaft 5, the two main turning shaft mounting seats 44 are respectively and fixedly mounted on one side surface of the second mounting plate 7, so that the second mounting plate 7 is clamped between the two main turning shaft mounting seats 44, a strip-shaped pin hole 46 extending along an axial direction is provided at a position corresponding to the main turning shaft mounting seat 44 on the main turning shaft 5, a transmission thread cylinder 47 is provided in an inner cavity of the main turning shaft 5, a side surface of the transmission thread cylinder 47 is provided with a groove, a key groove 45 is also provided on an inner circumferential surface of the main turning shaft mounting seat 44, the key 48 penetrates through the strip-shaped pin hole 46, two sides of the key groove 45 are respectively and fixedly mounted in the groove of the transmission thread cylinder 47, and the transmission thread cylinder 47 drives the key 48 to axially move along the main turning shaft mounting seat 44 and the main turning shaft mounting seat 44 when the main turning shaft 5 axially moves, and the key 48 drives the main turning shaft mounting seat 7 axially moves along the main turning shaft mounting seat 44 and the main turning shaft mounting seat 44. The distance adjusting hand wheel 12 is used for driving the transmission thread cylinder 47 to axially move in the inner cavity of the main turning shaft 5, specifically, the distance adjusting hand wheel 12 and the end part of the main turning shaft 5 are axially limited, the distance adjusting hand wheel is provided with a threaded rod 43 extending into the inner cavity of the main turning shaft 5, the threaded rod 43 extends into the transmission thread cylinder 47 in a threaded fit manner, the distance adjusting hand wheel 12 is screwed, the threaded rod 43 synchronously rotates, and under the threaded transmission, the transmission thread cylinder 47 axially moves along the threaded rod 43 to adjust the position of the second mounting plate 7.

The above details of each part of the product are described in conjunction with fig. 1-11, and after knowing the detailed structure of each part, the working process of the product is described again in conjunction with fig. 1, 2 and 6:

taking one of the winding machine components as an example, for example, the first winding motor 10 drives the first driving shaft 13 to work, the first driving shaft 13 drives the transmission components respectively positioned on the first mounting plate 6 and the second mounting plate 7 to work, and the driven pulleys 16 of the two transmission components synchronously rotate, so that the first clamping plate 19 and the second clamping plate 20 are driven to synchronously rotate; simultaneously, the second clamping plate mounting shaft 26 also rotates synchronously, under the action of centrifugal force, the front ends of the two clamping strips 31 are thrown outwards to form a fork with the front ends opened, after the plastic bag is wound on the mandrel 35, the two clamping strip cylinders push the clamping strips 31 to move forwards, after the rear ends of the clamping strips 31 touch the end inclined surfaces 34 of the strip-shaped sliding grooves 33, under the limiting of the structure, the two clamping strips 31 are folded from an outstretched state and clamped on the plastic bag roll through the gaps 32, rotate along with the winding machine component and are matched with the clamping strips 31 to finish tearing of a new roll and an old roll and establish winding of the new roll, and in the winding process, the two clamping plates are respectively attached to one side surface of the plastic bag roll and rotate synchronously with the plastic bag roll and are matched with the clamping strips to prevent the plastic bag roll from sliding relative to the mandrel, and the tail positions of different plastic roll winding rolls can be determined at the same angle when the winding process is finished, so that adhesive tapes or label attaching equipment can be matched to automatically bond and fix the tail ends;

after the old roll and the new roll are torn off, the old roll falls off from the winding machine component into tools such as a containing box below, and in the falling-off process, the holding strip 31 is drawn back under the drive of the holding strip cylinder, the holding strip 31 breaks away from the inclined plane 34 to lose structural limit and breaks away from the plastic bag roll, and after the holding strip 31 is re-opened into a fork shape with the front end opened under the centrifugal force effect, the next winding is prepared; simultaneously, the internal gas of the second clamping plate mounting shaft 26 is gradually decompressed, the hollow push tube 38 is retracted, the peripheral wall of the mandrel 35 is driven to gradually shrink inwards in the radial direction, in the process, the internal gas of the mandrel 35 is gradually discharged from the air holes 39, so that the length of the mandrel 35 is gradually shortened until the plastic bag roll on the mandrel 35 falls off, in the process, the length of the mandrel 35 is gradually shortened, and the problem that the inner layer of the plastic bag roll is pulled out due to the pulling friction between the outer peripheral surface of the existing steel mandrel and the inner peripheral surface of the middle gap of the plastic bag roll when the existing steel mandrel is retracted does not exist.

The main overturning motor 8 drives the main overturning shaft 5 to rotate, so that the position change of the two winding machine components is realized, and the circulating continuous work of the winding machine components is ensured.

While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover modifications or variations of the equivalent structures or equivalent processes, which may be accomplished by those skilled in the art without undue effort based on the teachings herein, or by direct or indirect application to other related arts, while remaining within the scope of the present invention.

Claims

1. The coreless reel changer comprises a reel changer supported by a bracket, and is characterized by comprising a main turnover shaft, a first mounting plate and a second mounting plate, wherein the main turnover shaft can not relatively rotate and penetrates through the first mounting plate and the second mounting plate, two reel assemblies are arranged between the first mounting plate and the second mounting plate, and the two reel assemblies are symmetrically distributed relative to the main turnover shaft;

2. The automatic unreeling and reeling machine without a core, which is capable of automatically sticking tails, according to claim 1, further characterized in that a reeling motor mounting plate is fixedly arranged on the main overturning shaft and close to the first mounting plate, a first reeling motor and a second reeling motor are fixedly arranged on the reeling motor mounting plate, a first driving shaft and a second driving shaft are rotatably arranged between the first mounting plate and the second mounting plate, the first driving shaft is in power connection with the first reeling motor, the second driving shaft is in power connection with the second reeling motor, the first driving shaft drives a first splint mounting shaft and a second splint mounting shaft of one reeling machine component to synchronously rotate through a transmission component, and the second driving shaft drives a first splint mounting shaft and a second splint mounting shaft of the other reeling machine component to synchronously rotate through the transmission component.

3. The automatic unwind and tail-sticking coreless reel changer of claim 2 further characterized in that said drive assembly comprises a drive pulley non-rotatably mounted on either the first drive shaft or the second drive shaft, a driven pulley non-rotatably mounted on either the first clamp plate mounting shaft or the second clamp plate mounting shaft, and a drive belt mounted between the drive pulley and the driven pulley for power transmission therebetween.

4. The automatic unwind and tail-sticking coreless reel changer of claim 3 further comprising a tensioning wheel fixedly mounted on the first mounting plate or the second mounting plate by a rotating shaft, the tensioning wheel cooperating with the drive belt for providing tension to the drive belt.

5. The automatic unreeling and reeling and automatic tail-sticking coreless reel changer of claim 2 further characterized in that the first clamping plate mounting shaft is rotatably mounted on the second mounting plate, one end of the first clamping plate far away from the second mounting plate is mounted on the first clamping plate in a non-rotatable manner, the first clamping plate comprises a sleeve part and a clamping plate part, the sleeve part is assembled on the first clamping plate mounting shaft, a spring is sleeved on the first clamping plate mounting shaft, and the spring is abutted between the second mounting plate and the sleeve part;

the sleeve part is also provided with a bearing flange in an axial limiting manner, an air cylinder is arranged between the bearing flange and the second mounting plate, and the air cylinder can push the second mounting plate to move forwards and backwards along the axial direction of the winding machine component through the bearing flange.

6. The automatic unreeling and reeling and automatic tail-sticking coreless reel changer of claim 2 or 5, further characterized in that the second clamping plate mounting shaft is provided with a hollow channel, a mandrel assembly capable of extending and retracting from the hollow channel is arranged in the hollow channel, the mandrel assembly comprises a mandrel, a hollow push tube, a mandrel limiting seat, a mandrel pushing seat and a mandrel return spring, the mandrel limiting seat is positioned in the hollow channel and fixed, and the mandrel limiting seat is sleeved on the hollow push tube in a relatively sliding manner; the mandrel pushing seat is arranged in the hollow channel in a sliding manner, and is fixedly sleeved at the tail end of the hollow pushing tube; a mandrel reset spring is sleeved between the mandrel pushing seat and the mandrel limiting seat on the hollow pushing tube;

the core shaft is made of flexible materials without elasticity, the front end of the core shaft is fixedly connected with the front end of the hollow push tube, the rear end of the core shaft is fixedly connected with the core shaft limiting seat, an annular cavity is formed between the core shaft and the hollow push tube, and the front end of the hollow push tube is provided with an air hole which is communicated with the annular cavity and the internal channel of the hollow push tube.

7. The automatic unreeling and unreeling, automatic tail-sticking coreless reel changer of claim 6 further characterized in that the front end of the hollow push tube is plugged, the outer peripheral surface of the front end is provided with a fixing part matched with the mandrel, the front end of the mandrel is provided with a matching part, and the matching part is fixedly connected with the fixing part in a sealing way; and the peripheral wall of the mandrel is smoothly transited to the matching part radially inwards.

8. The automatic unreeling and reeling and automatic tail-sticking coreless reel changer of claim 6 further characterized in that the second clamping plate mounting shaft is rotatably mounted on the first mounting plate through a transmission shaft, one end of the transmission shaft is unrotatably extended into the hollow channel, and the other end of the transmission shaft is in transmission connection with the transmission assembly; and a path for supplying air to the hollow channel is arranged in the transmission shaft.

9. The automatic unreeling and reeling and automatic tail-sticking coreless reel changer of claim 1 or 2 further characterized in that one end of the main turning shaft is in power connection with the main turning motor, the other end of the main turning shaft is provided with a distance-adjusting hand wheel, the distance-adjusting hand wheel is screwed in the main turning shaft through a threaded rod, and the axial positions of the distance-adjusting hand wheel and the end part of the main turning shaft are fixed.

10. The coreless roll changer with automatic unreeling and automatic tail sticking according to claim 9, further characterized in that two sides of the second mounting plate are respectively and fixedly provided with a main overturning shaft mounting seat, the main overturning shaft passes through the two main overturning shaft mounting seats, a strip-shaped pin hole extending along the axial direction is formed in the position, corresponding to the main overturning shaft mounting seat, of the main overturning shaft, a transmission thread cylinder is arranged in an inner cavity of the main overturning shaft, a groove is formed in the side surface of the transmission thread cylinder, and a key groove is formed in the inner peripheral surface of the main overturning shaft mounting seat; the key penetrates through the strip-shaped pin hole, and two sides of the key are respectively accommodated in a key groove of the main overturning shaft mounting seat and a groove of the transmission thread cylinder; the threaded rod is in threaded fit with the inside of the transmission threaded cylinder.