Winding shaft positioning device of four-station plastic film winding machine

Abstract

The utility model relates to a coiling shaft positioning device of a four-station plastic film coiling machine. The coiling shaft positioning device comprises a locking device connected with a left turntable, an opening and closing device connected with a right turntable, and a swinging device arranged between a positioning lever and a bearing rotating sleeve, the locking device is used for locking one end of the winding shaft, the middle part of the winding shaft is used for penetrating a paper tube and tensioning the paper tube, and the other end of the winding shaft is rotationally connected with the bearing rotating sleeve; the opening and closing device is used for pressing the bearing rotating sleeve and the right rotating disc at ordinary times and providing power for the bearing rotating sleeve to swing. The swinging device is used for swinging the bearing rotating sleeve around the right rotating disc; the winding device has the advantages that the winding shaft can be swung when a paper tube is loaded or a film roll is unloaded through the swing device and the opening and closing device, and the winding shaft can be fixed to the rotary disc when a film is wound.

Description

TECHNICAL FIELD

[0001] The application relates to the field of winding machines, in particular to a four-station plastic film winding machine winding shaft positioning device. BACKGROUND

[0002] The four winding shafts of the four-station winding machine of the company are arranged between two rotating discs, the four winding shafts are arranged around the positioning lever of the rotating disc as the center, are uniformly distributed in the radial direction of the rotating disc positioning lever, form four stations, and the station is switched once every 90 degrees of rotation. When the winding shaft is unloaded and the paper tube is loaded, the winding shaft needs to be manually swung by a certain angle, which is inconvenient and inefficient, and needs to be solved.

[0003] The existing patent of the company earlier, application number CN201420692506.9, name is a gas inflation shaft deflation and conveying device; which discloses a motor, support frame, synchronous belt, deflation device, the support frame is provided with a driving wheel and a driven wheel at both ends, the motor is fixed on the side of the support frame provided with the driving wheel at one end, the output end of the motor is matched with the shaft of the driving wheel, the synchronous belt is closed and wound on the upper end face of the support frame after passing through the driving wheel and the driven wheel, the deflation device is fixed on the upper end face of the synchronous belt, the deflation device includes a bottom plate, a baffle, a deflation cylinder and a locking cylinder, the bottom plate is fixed on the upper end face of the synchronous belt, the baffle is symmetrically arranged on both sides of the bottom plate, the deflation cylinder is fixed on the upper end face of the bottom plate, and the locking cylinder is symmetrically arranged on both sides of the head of the deflation cylinder. Two locking cylinders lock the two sides of the shaft head of the gas inflation shaft. The gas inflation shaft cannot swing, and it is very inconvenient when the paper tube is worn and the film is unloaded;

[0004] There is also an application number 202023238954.6, name is a rotating disc driving device for plastic extrusion casting film machine, which discloses that the support frame 4 is fixed on the ground or wall plate 1, the center shaft 7 is arranged on the rotating disc, the first winding motor 5 and the second winding motor 6 are fixed on the support frame 4, and the transmission device is rotatably arranged on the center shaft 7. The center shaft 7 is located at the center position of the rotating disc. The transmission device comprises a rotating sleeve 10 rotatably mounted on the center shaft 7, a first synchronous pulley 9 and a second synchronous pulley 12 fixed on the rotating sleeve 10, and a synchronous pulley set rotatably arranged outside the rotating sleeve 10. The synchronous pulley set comprises a third synchronous pulley 11 and a fourth synchronous pulley 14 arranged side by side, and a positioning lever cylinder 15 fixedly installed between the third synchronous pulley 11 and the fourth synchronous pulley 14. The first synchronous pulley 9 and the third synchronous pulley 11 are connected by a synchronous belt with the first winding motor 5 and the second winding motor 6 respectively, and the second synchronous pulley 12 and the fourth synchronous pulley 14 are connected by a synchronous belt with the second winding shaft 13 and the first winding shaft 8 respectively. The power of the winding shaft is arranged outside the rotating disc, and cannot rotate with the rotating disc. It is inconvenient. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses a four station plastic film winding machine winding shaft positioning device adopts mechanical structure, can realize winding shaft when unloading membrane roll and loading paper tube, can swing certain angle, replaces original manual angle of lifting, improves efficiency.

[0006] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] Four station membrane roll machine is equipped with left turntable, right turntable and the positioning lever fixedly connected between the center of left turntable and the center of right turntable, is equipped with four winding shaft assembly between the edge of left turntable and right turntable, and winding shaft assembly includes the winding shaft for wearing paper tube and the bearing rotating sleeve rotationally connected with winding shaft, a four station plastic film winding machine winding shaft positioning device, including locking device with left turntable is connected, and the opening and closing device with right turntable is connected and is arranged between the bearing rotating sleeve and the positioning lever swing device, locking device is used to lock one end of winding shaft, and the middle part of winding shaft is used to wear paper tube and tightens paper tube, and the other end of winding shaft is rotationally connected with bearing rotating sleeve, opening and closing device is used to lock bearing rotating sleeve with right turntable normally, and provides the power when bearing rotating sleeve swings, swing device is used to swing bearing rotating sleeve around right turntable.

[0008] Further, the locking device includes a fixed sleeve fixedly connected with the right turntable, a first air cylinder fixedly connected with the fixed sleeve, a bearing sleeve connected with the cylinder rod of the first air cylinder, and a thrust shaft rotationally connected with the bearing sleeve.

[0009] Further, the thrust shaft is provided with a conical surface, one end of the winding shaft is inserted into the conical surface, a bearing is arranged between the thrust shaft and the bearing sleeve, and an oil filler is arranged on the thrust shaft for lubricating the bearing.

[0010] Further, the swing device includes a connecting shaft fixedly connected with the positioning lever at one end, a fixed frame fixedly connected with the other end of the connecting shaft, and a rotating shaft rotationally connected with the fixed frame.

[0011] Further, the right rotating disc is provided with four square holes near the edge, the four square holes are uniformly distributed along the center of the right rotating disc; the square holes correspond to the bearing rotating sleeve; two sides of the square hole are respectively provided with a track for swinging of the bearing rotating sleeve, the track comprises a left track assembly and a right track assembly, the left track assembly and the right track assembly are the same in structure; the right track assembly comprises an adjusting block fixedly connected with the right rotating disc, an adjusting screw threadedly connected with the adjusting block and a right track abutting against the end of the adjusting screw; after the right track and the left track are adjusted by the adjusting screw, the left track and the right track are fixed on the two sides of the right rotating disc; when the coiling shaft works, the clamping and releasing device locks the bearing rotating sleeve on the right rotating disc.

[0012] Further, the clamping and releasing device comprises a cylinder connecting seat fixedly connected with the right rotating disc, a second cylinder hingedly connected with the cylinder connecting seat and a thrust frame hingedly connected with the cylinder rod of the second cylinder; the thrust frame is fixedly connected with the bearing rotating sleeve, and the second cylinder is two and is arranged on the two sides of the bearing rotating sleeve.

[0013] Further, the right rotating disc is provided with a limiting block for preventing the bearing rotating sleeve from colliding with the inner wall of the square hole when swinging.

[0014] Further, the end face of the square hole is provided with a second proximity switch; the second proximity switch is used for detecting whether the bearing rotating sleeve is in close contact with the track.

[0015] Further, the clamping and releasing device comprises a cylinder connecting seat fixedly connected with the right rotating disc, a second cylinder hingedly connected with the cylinder connecting seat and a thrust frame hingedly connected with the cylinder rod of the second cylinder; the thrust frame is fixedly connected with the bearing rotating sleeve, and the second cylinder is two and is arranged on the two sides of the bearing rotating sleeve.

[0016] Further, the balancing device comprises a fastening sleeve fixedly connected with the positioning rod and a third cylinder hingedly connected with the fastening sleeve; the cylinder rod of the third cylinder is hingedly connected with the bearing rotating sleeve.

[0017] The utility model discloses the beneficial effect is:

[0018] When the coiling shaft needs to unload the film roll or to wear the paper tube, the first cylinder of the locking device is loosened, the thrust shaft is separated from one end of the coiling shaft, the second cylinder of the clamping and releasing device pushes the bearing rotating sleeve to swing around the rotating shaft of the fixed frame on the positioning rod to the outside of the rotating disc, one end of the coiling shaft close to the thrust shaft is stretched to the outside of the right rotating disc, and the film roll is unloaded or the paper tube is worn.

[0019] By the balancing device, since the winding shaft is relatively long, and the bearing rotating sleeve one end is because set drive winding shaft rotation motor and support, is relatively cumbersome, in the second cylinder push bearing rotating sleeve, the force needed is very big, the third cylinder of balancing device auxiliary push bearing rotating sleeve swing; After the winding shaft unloads the film roll or wears the paper tube, it needs to reset, at this time, the second cylinder contracts, in order to prevent resetting too fast, cause collision, the third cylinder applies certain resistance, makes the bearing rotating sleeve reset slowly. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structural diagram of the utility model;

[0021] Figure 2 It is the structural diagram of the winding shaft swing of the opening and closing device;

[0022] Figure 3 It is the structural diagram of the swing device;

[0023] Figure 4 It is Figure 3 the A-A section view of;

[0024] Figure 5 It is the structural diagram of the opening and closing device left view;

[0025] Figure 6 It is the structural diagram of the opening and closing device front view;

[0026] Figure 7 It is the structural diagram of the track;

[0027] Figure 8 It is the structural diagram of the balancing device;

[0028] Figure 9 It is the structural diagram of the locking device;

[0029] Figure 10 It is the first proximity switch installation schematic diagram;

[0030] Mark explanation in drawing:

[0031] 1-left turntable, 2-right turntable, 3-positioning lever, 4-swing device, 5-winding shaft, 6-opening and closing device, 7-bearing rotating sleeve, 8-balancing device;

[0032] 11-fixed sleeve, 12-first cylinder, 13-bearing sleeve, 14-thrust shaft, 15-cone surface, 16-oil filler, 17-first proximity switch;

[0033] 21-adjusting block, 22-right track, 23-adjusting screw;

[0034] 61-cylinder connecting seat, 62-second cylinder, 63-thrust frame, 64-limiting block, 65-second proximity switch, 66-nylon block;

[0035] 71-fixed frame, 72-rotating shaft, 73-connecting shaft;

[0036] 81-fastening sleeve, 82-third cylinder, 83-second rod end joint bearing, 84-hinge seat, 85-first rotating shaft, 86-rod end joint bearing, 87-cylinder seat. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model; the described embodiments are only some of the embodiments of the utility model; rather than all the embodiments, based on the embodiments in the utility model; all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0038] Embodiment 1

[0039] Four stations film roll machine is provided with left turntable 1, right turntable 2 and the positioning lever 3 fixedly connected between the center of left turntable 1 and the center of right turntable 2; four winding shaft assemblies are arranged between the edges of left turntable 1 and right turntable 2, and the four winding shaft assemblies are uniformly distributed on the turntable; the winding shaft assembly comprises a winding shaft 5 for threading a paper tube, a transmission shaft fixedly connected with the winding shaft 5 and a bearing rotating sleeve 7 rotationally connected with the transmission shaft; the bearing rotating sleeve 7 is provided with a driving device for driving the transmission shaft to rotate, which adopts the mode of synchronous belt driven by a speed reducer motor; the winding shaft 5 is an air expansion shaft;

[0040] When the turntable rotates by 90 degrees, the winding shaft 5 respectively realizes four action cycles of threading a paper tube, winding a film, cutting off and unloading a film, and realizes automatic film winding; when unloading a film, the winding shaft 5 is deflated to facilitate unloading a film; when threading a paper tube, the winding shaft 5 is deflated to thread a paper tube, and after threading a paper tube, the winding shaft is inflated to position the paper tube;

[0041] As shown in Figure 1 、 2 , 9, a four-station plastic film winding machine winding shaft positioning device, comprising a locking device connected with the left turntable 1, a tensioning device 6 connected with the right turntable 2 and a swing device 4 arranged between the positioning lever 3 and the bearing rotating sleeve 7; the locking device is used for locking one end of the winding shaft 5, the middle part of the winding shaft 5 is used for threading a paper tube and tightening the paper tube, and the other end of the winding shaft 5 is fixed with the transmission shaft to realize rotational connection with the bearing rotating sleeve 7; the tensioning device 6 is used for locking the bearing rotating sleeve 7 with the right turntable 2 at ordinary times, and provides power when the bearing rotating sleeve 7 swings; the swing device 4 is used for swinging the bearing rotating sleeve 7 around the right turntable 2.

[0042] When the take-up shaft 5 is winding or cutting film, one end is held by a locking device, and the other end is driven to rotate by a drive device mounted on the bearing sleeve 7. The bearing sleeve 7 is fixed on the right turntable 2 by the opening and closing device 6. When it is necessary to unload the film or insert the paper tube, the opening and closing device 6 pushes the bearing sleeve 7 to swing around the positioning bar 3 through the swing device 4, so that the take-up shaft 5 swings at a certain angle.

[0043] like Figure 9 As shown, the locking device includes a fixed sleeve 11 fixedly connected to the left turntable 1, a first cylinder 12 fixedly connected to the fixed sleeve 11, a bearing sleeve 13 connected to the cylinder rod of the first cylinder 12, and a thrust shaft 14 rotatably connected to the bearing sleeve 13; the thrust shaft 14 is engaged with the winding shaft 5; and the bearing sleeve 13 is slidably connected to the fixed sleeve 11.

[0044] The thrust shaft 14 is provided with a conical surface 15; one end of the winding shaft 5 is inserted into the conical surface 15; the conical surface 15 facilitates the insertion of the winding shaft 5 into the thrust shaft 14 without the need for a special centering device.

[0045] A bearing is provided between the thrust shaft 14 and the bearing sleeve 13 to enable the rotation of the winding shaft 5 and prevent jamming;

[0046] The thrust shaft 14 is provided with a grease nipple 16 for lubricating the bearing, which facilitates lubrication of the bearing.

[0047] The left turntable 1 is equipped with a proximity switch bracket, and the proximity switch bracket is equipped with a first proximity switch 17 for detecting whether the winding shaft 5 and the thrust shaft 14 are tightly pressed together.

[0048] When it is necessary to remove the film or insert the paper tube, the first cylinder 12 retracts, causing the thrust shaft 14 to disengage from one end of the winding shaft 5, making it easier for the winding shaft 5 to open.

[0049] like Figure 3 , 4 As shown, in order for the winding shaft 5 to swing, a fulcrum is required. The structure of the fulcrum is defined as the swing device 4, which is located between the positioning bar 3 and the bearing sleeve 7.

[0050] The swing device 4 includes a connecting shaft 73 fixedly connected to the positioning bar 3, a fixing frame 71 fixedly connected to the other end of the connecting shaft 73, and a rotating shaft 72 rotatably connected to the fixing frame 71; the rotating shaft 72 is fixedly connected to the bearing sleeve 7; the fixing frame 71 is U-shaped, and the two sides of the fixing frame 71 are hinged to the two sides of the bearing sleeve 7 through two rotating shafts 72.

[0051] The detailed structure is that the fixed frame 71 is provided with a circular hole, the connecting shaft 73 is inserted into the circular hole, the side wall of the circular hole is provided with a slot, the two sides of the slot are locked by bolts, and then the connecting shaft 73 is locked in the circular hole;

[0052] The two side walls of the fixed frame 71 are provided with through holes near the end portions, one end of the rotating shaft 72 is inserted into the through hole, the side wall near the end portion is provided with an open slot which is communicated with one side of the through hole, one end of the rotating shaft 72 is fixed by locking the side wall of the open slot by bolts, and the other end of the rotating shaft 72 rotates through bearings and bearing sleeves 7 on the two sides; the bearing sleeves 7 provided with two rotating shafts 72 are more stable during work.

[0053] The right rotating disc 2 is provided with four square holes near the edge, the four square holes are uniformly distributed along the center of the right rotating disc 2; the bearing sleeve 7 is square in cross section, and the square holes correspond to the bearing sleeve 7; each square hole corresponds to a set of coiling shaft assembly;

[0054] As shown in Figure 7 The two sides of the square hole are respectively provided with tracks for swinging of the bearing sleeve 7, the tracks include left track assemblies and right track assemblies, and the left track assemblies and the right track assemblies are the same in structure; the right track assembly includes an adjusting block 21 fixedly connected with the right rotating disc 2, an adjusting screw 23 threadedly connected with the adjusting block 21 and a right track 22 abutting against the end portion of the adjusting screw 23; after the right track 22 and the left track are in the same plane by the adjusting screw 23, the left track and the right track 22 are respectively fixed on the two sides of the right rotating disc 2; during work of the coiling shaft 5, the bearing sleeve 7 clamped on the left track and the right track 22 is locked on the track of the right rotating disc 2, and when the coiling shaft 5 needs to swing, the bearing sleeve 7 slides on the track.

[0055] As shown in Figure 5 / 6, the opening and closing device 6 includes a cylinder connecting seat 61 fixedly connected with the right rotating disc 2, a second cylinder 62 hingedly connected with the cylinder connecting seat 61 and a thrust frame 63 hingedly connected with the cylinder rod of the second cylinder 62; the thrust frame 63 is fixedly connected with the bearing sleeve 7, and the second cylinder 62 is two and is arranged on the two sides of the bearing sleeve 7; when the coiling shaft assembly is pushed, the two cylinders 62 are more balanced and stable;

[0056] The thrust frame 63 is fixedly provided with a nylon block 66; the right rotating disc 2 is provided with a limiting block 64 for preventing the bearing sleeve 7 from colliding with the inner wall of the square hole during swinging; the limiting block 64 is installed to avoid collision between the bearing sleeve 7 and the inner wall of the square hole during swinging of the coiling shaft 5, so as to prevent damage;

[0057] The hard limiting limiting block 64 is used for abutting the nylon block 66 on the thrust frame 63 against the limiting block 64 when the coiling shaft 5 is opened, and is also used for preventing the coiling shaft 5 from continuing to open after opening to a set angle due to excessive gas pressure.

[0058] The square hole end face is provided with a second proximity switch 65; the second proximity switch 65 is used to detect whether the winding shaft 5 is in the working position.

[0059] The second proximity switch 65 detects whether the take-up shaft 5 has returned to the working position after the paper tube is threaded or the film roll is unloaded. Upon detection that it has returned to the working position, the first cylinder 12 pneumatically locks the take-up shaft 5. Figure 1 As shown, the working position refers to the situation where the bearing sleeve 7 of the winding shaft 5 is pressed against the side wall of the square hole; after the second proximity switch 65 detects that the winding shaft 5 has returned to the working position, the controller sends a signal to the first cylinder 12, and the thrust shaft 14 is pressed against the winding shaft 5.

[0060] The film winding machine of this application is equipped with a controller, which connects the proximity switch signals and cylinder signals of this application to the controller; this facilitates the control of each proximity switch and cylinder.

[0061] The working process of this utility model,

[0062] When it is necessary to unload the film or load the paper tube, the take-up shaft 5 rotates to the designated position with the turntable, the locking device is released, the first cylinder 12 drives the thrust shaft 14 to retract, and the thrust shaft 14 is disengaged from the take-up shaft 15.

[0063] The second cylinder 62 is activated, and the cylinder rod of the second cylinder 62 extends, pushing the bearing sleeve 7 to rotate around the rotating shaft 72 at a certain angle through the thrust frame 63. In this application, it is 8 degrees. In this way, one end of the winding shaft 5 leaves the left turntable 1, which makes it easier to unload the film roll or thread the paper tube.

[0064] After the film roll is unloaded, the cylinder rod of the second cylinder 62 retracts, driving the thrust frame 63 to reset the bearing sleeve 7 and press it onto the track for film winding or cutting.

[0065] Example 2

[0066] This embodiment has a basically the same structure as Embodiment 1.

[0067] The difference is that,

[0068] During use, it was found that when the two second cylinders 62 push the bearing sleeve 7 to swing, the initial start is relatively slow, and when it needs to stop, the inertia causes a collision. Therefore, it is necessary to add a balancing device to overcome these defects.

[0069] like Figure 8 As shown, this application also includes a balancing device 8, which is used to balance the thrust and pressure applied by the tensioning device 6 to the winding shaft assembly, so as to avoid the winding shaft assembly having too much inertia when swinging or returning, and the bearing sleeve 7 colliding with the inner wall of the square hole.

[0070] The balancing device 8 comprises a fastening sleeve 81 fixedly connected with the positioning lever 3, and a third cylinder 82 hingedly connected with the fastening sleeve 81; the cylinder rod of the third cylinder 82 is hingedly connected with the bearing rotating sleeve 7.

[0071] When the second cylinder 62 pushes the bearing rotating sleeve 7 to swing, in the initial stage, the bearing rotating sleeve 7 slides on the track of the square hole, and the resistance is relatively large, so the third cylinder 82 also assists in pushing the bearing rotating sleeve 7 to swing to the position as soon as possible; when the bearing rotating sleeve 7 is reset, the second cylinder 62 is retracted, in order to prevent the bearing rotating sleeve 7 from colliding with the square hole under the action of inertia, the third cylinder 82 applies a certain resistance, so that the bearing rotating sleeve 7 is slowly reset.

[0072] Embodiment 3

[0073] The embodiment is basically the same as the structure of the embodiment 2,

[0074] The difference is that,

[0075] As shown in the figure, the scheme of the balancing device 8 is refined; Figure 8

[0076] The fastening sleeve 81 is a two-half-circle structure, which is sleeved on the positioning lever 3 through bolts, a first rotating shaft 85 is fixed on the fastening sleeve 81, a cylinder seat 87 is threadedly connected to the tail of the third cylinder 82, a rod end spherical bearing 86 is threadedly connected to the cylinder seat 87, and the bearing of the rod end spherical bearing 86 is matched with the first rotating shaft 85; the tail of the third cylinder 82 is hingedly connected;

[0077] A second rod end spherical bearing 83 is threadedly connected to the cylinder rod of the third cylinder 82, and a hinging seat 84 is fixed on the bearing rotating sleeve 7 through bolts; the hinging seat 84 is hingedly connected with the second spherical bearing 83 through a second rotating shaft.

[0078] Through the two rod end bearings, the third cylinder 82 can be hingedly connected between the bearing rotating sleeve 7 and the fastening sleeve 81, so as to avoid that the cylinder is stuck and the swinging of the bearing rotating sleeve 7 is limited when the bearing rotating sleeve 7 swings.

[0079] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this; any person skilled in the art can make equivalent replacement or change according to the technical scheme and improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

[0080] ​It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other presenters can view. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be appreciated that the language and combinations of words are intended to be interpreted broadly and not limited to the specific embodiments explicitly described. Embodiments as described in this detailed description are intended to be broadly construed as including both structural and environmental equivalents (e.g., equivalents in means, materials, acts, etc.).

[0081] The above description is merely that of the embodiments of the present application, and the common knowledge of the specific structure and characteristics in the scheme is not described in detail herein. The ordinary skilled person in the art knows all the ordinary technical knowledge in the field of the present application before the filing date or the priority date, can know all the prior art in the field, and has the ability to apply the conventional experimental means before that date. The ordinary skilled person in the art can perfect and implement the present scheme with their own ability under the guidance of the present application, and some typical known structures or known methods should not be an obstacle for the ordinary skilled person in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the implementation of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A four-station plastic film winding machine winding shaft positioning device, the four-station film winding machine is provided with a left turntable (1), a right turntable (2) and a positioning lever (3) fixedly connected between the center of the left turntable (1) and the center of the right turntable (2); four winding shaft assemblies are arranged between the edges of the left turntable (1) and the right turntable (2), the winding shaft assembly comprises a winding shaft (5) for a paper tube and a bearing sleeve (7) rotatably connected with the winding shaft (5); characterized in that, The locking device is connected with the left turntable (1), the opening and closing device (6) is connected with the right turntable (2), and the swing device (4) is arranged between the positioning lever (3) and the bearing rotating sleeve (7); the locking device is used for locking one end of the winding shaft (5), the middle part of the winding shaft (5) is used for penetrating the paper tube and tightening the paper tube, the other end of the winding shaft (5) is rotatably connected with the bearing rotating sleeve (7) through a transmission shaft; the opening and closing device (6) is used for locking the bearing rotating sleeve (7) with the right turntable (2) in normal times, and providing power when the bearing rotating sleeve (7) swings; the swing device (4) is used for swinging the bearing rotating sleeve (7) around the right turntable (2).

2. The four-station plastic film winder spindle positioning apparatus of claim 1, wherein: The locking device comprises a fixed sleeve (11) fixedly connected with the left turntable (1), a first cylinder (12) fixedly connected with the fixed sleeve (11), a bearing sleeve (13) rotatably connected with the first cylinder (12), and a thrust shaft (14) rotatably connected with the bearing sleeve (13); the thrust shaft (14) is connected with the winding shaft (5); the bearing sleeve (13) is slidably connected with the fixed sleeve (11).

3. The four-station plastic film winder spindle positioning apparatus of claim 2, wherein, The thrust shaft (14) is provided with a tapered surface (15); one end of the winding shaft (5) is inserted into the tapered surface (15); a bearing is arranged between the thrust shaft (14) and the bearing sleeve (13), and an oil filler (16) is arranged on the thrust shaft (14) for lubricating the bearing; A first proximity switch (17) is arranged on the left turntable (1) for detecting whether the winding shaft (5) and the thrust shaft (14) are tightly connected.

4. The four-station plastic film winder spindle positioning apparatus of claim 1 wherein, The swing device (4) comprises a connecting shaft (73) fixedly connected with the positioning lever (3), a fixed frame (71) fixedly connected with the other end of the connecting shaft (73), and a rotating shaft (72) rotatably connected with the fixed frame (71); the rotating shaft (72) is fixedly connected with the bearing rotating sleeve (7); the fixed frame (71) is U-shaped, and the two sides of the fixed frame (71) are hingedly connected with the two sides of the bearing rotating sleeve (7) through two rotating shafts (72).

5. The four-station plastic film winder spindle positioning apparatus of claim 4, wherein: Four square holes are arranged near the edge of the right turntable (2), and the four square holes are uniformly distributed along the center of the right turntable (2); the square holes correspond to the bearing rotating sleeve (7); the two sides of the square hole are respectively provided with a track for swinging the bearing rotating sleeve (7), and the track comprises a left track assembly and a right track assembly, and the left track assembly and the right track assembly are the same in structure; the right track assembly comprises an adjusting block (21) fixedly connected with the right turntable (2), an adjusting screw (23) threadedly connected with the adjusting block (21), and a right track (22) abutting against the end of the adjusting screw (23); after the right track (22) and the left track are adjusted by the adjusting screw (23), the left track and the right track (22) are fixed on the two sides of the right turntable (2); when the winding shaft (5) works, the opening and closing device (6) locks the bearing rotating sleeve (7) on the right turntable (2).

6. The four-station plastic film winder spindle positioning apparatus of claim 5, wherein: The opening and closing device (6) comprises a cylinder connecting seat (61) fixedly connected with the right rotating disc (2), a second cylinder (62) hinged with the cylinder connecting seat (61), and a thrust frame (63) hinged with a cylinder rod of the second cylinder (62); the thrust frame (63) is fixedly connected with the bearing rotating sleeve (7), and the second cylinder (62) is two and is arranged on two sides of the bearing rotating sleeve (7) respectively.

7. The four-station plastic film winder spindle positioning apparatus of claim 6, wherein: The thrust frame (63) is provided with a shock-absorbing nylon block (66), and the right rotating disc (2) is provided with a limiting block (64) for preventing the bearing rotating sleeve (7) from colliding with an inner wall of the square hole when swinging.

8. The four-station plastic film winder spindle positioning apparatus of claim 7, wherein: The square hole end face is provided with a second proximity switch (65); the second proximity switch (65) is used for detecting whether the winding shaft (5) returns to a working position after passing through the paper tube or after unloading the film roll.

9. The four-station plastic film winder spindle positioning apparatus of claim 1 wherein: Further comprising a balancing device (8) for balancing the pulling force and pressure of the opening and closing device (6) on the winding shaft assembly, avoiding too large inertia of the winding shaft assembly when swinging or returning, and collision of the bearing rotating sleeve (7) with the inner wall of the square hole.

10. The four-station plastic film winder spindle positioning apparatus of claim 9, wherein: The balancing device (8) comprises a fastening sleeve (81) fixedly connected with the positioning rod (3), and a third cylinder (82) hinged with the fastening sleeve (81); a cylinder rod of the third cylinder (82) is hinged with the bearing rotating sleeve (7).

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