CN115196566B - Automatic cap screwing device for plastic bottle - Google Patents

Abstract

The application relates to an automatic cap screwing device for a plastic bottle, and relates to the technical field of bottle cap installation; the bottle cap screwing device comprises a cap supply track for conveying the bottle caps, a bottle supply conveying belt for conveying the plastic bottles, and a cap screwing assembly for screwing the bottle caps on the openings of the plastic bottles; the cover supply rail is positioned above the bottle supply conveyor belt, a blanking port is formed in the bottom wall of the cover supply rail in a penetrating manner, and the inner diameter of the blanking port is consistent with the outer diameter of the bottle cover; the cover feeding rail is also provided with a cover closing assembly, the cover closing assembly comprises a limiting push plate and a pushing piece, the limiting push plate is connected to the cover feeding rail in a sliding manner along the length direction of the cover feeding rail, and the pushing piece is used for driving the limiting push plate to be close to the bottle cover and pushing the bottle cover to the blanking port so that the bottle cover is separated from the cover feeding rail from the blanking port; this application has can make the bottle lid when falling into the open department of plastic bottle for the screw thread in the bottle lid can with the screw thread adaptation block on the plastic bottle outer wall, so that follow-up effect of going on smoothly of screwing up the lid operation.

Description

Automatic cap screwing device for plastic bottle

Technical Field

The application relates to the technical field of bottle cap installation, in particular to an automatic cap screwing device for a plastic bottle.

Background

The plastic bottle is mainly used for liquid or solid disposable packaging containers such as beverage, food, dried fruit, food oil and the like, and has the characteristics of uneasy breaking, low cost, high transparency and the like.

The application of plastic bottles has been popularized to the aspect of life of people, the body shadow of the plastic bottles is visible everywhere, when the plastic bottles are used for installation in factories, the screwing of the plastic bottle caps is an important step, in order to improve the screwing efficiency, the China patent application with the publication number of CN112320719A discloses an automatic screwing device of the plastic bottle caps for industrial production, which comprises a bottom plate, wherein the top of the bottom plate is provided with a servo motor and a bracket, a transmission mechanism is arranged between the bottom of the bracket and an output shaft of the servo motor, one side of the bracket is provided with a blanking mechanism, and a screwing mechanism is also arranged between the bracket and an output end of the servo motor; during operation, the staff pours the bottle lid into unloading mechanism, carries the plastic bottle that does not overlap the bottle lid to unloading mechanism department through drive mechanism to make the bottle lid close in the open department of plastic bottle, and rethread drive mechanism carries the plastic bottle that has the bottle lid to screw up mechanism department, screws up the plastic bottle that has the bottle lid through screw up mechanism at last, so that the bottle lid is firmly overlapped and establish on the plastic bottle.

For the related art, the inventor finds that in order to enable the plastic bottle and the bottle cap to be finally screwed, the outer side wall of the plastic bottle and the inner wall of the bottle cap are generally provided with mutually matched threads, and when the bottle cap is discharged through the discharging mechanism and sleeved at the opening of the plastic bottle, the condition that the bottle cap is inclined relative to the height direction of the plastic bottle easily occurs, so that the threads on the bottle cap and the plastic bottle are not clamped with each other, and further the subsequent screwing operation of the bottle cap and the plastic bottle by the screwing mechanism is affected.

Disclosure of Invention

In order to enable the bottle cap to fall into the open position of the plastic bottle, threads in the bottle cap can be matched and clamped with threads on the outer wall of the plastic bottle, so that follow-up cap screwing operation can be smoothly carried out.

The application provides an automatic device of screwing up of plastic bottle adopts following technical scheme:

an automatic cap screwing device for plastic bottles comprises a cap supply rail for conveying the bottle caps, a bottle supply conveyor belt for conveying the plastic bottles, and a cap screwing assembly for screwing the bottle caps on the openings of the plastic bottles; the cover supply rail is positioned above the bottle supply conveyor belt, a blanking port is formed in the bottom wall of the cover supply rail in a penetrating manner, and the inner diameter of the blanking port is consistent with the outer diameter of the bottle cover; the cover feeding rail is further provided with a cover closing assembly, the cover closing assembly comprises a limiting push plate and a pushing piece, the limiting push plate is connected onto the cover feeding rail in a sliding mode along the length direction of the cover feeding rail, and the pushing piece is used for driving the limiting push plate to be close to the bottle cover and pushing the bottle cover to the blanking port, so that the bottle cover is separated from the cover feeding rail from the blanking port.

Through adopting above-mentioned technical scheme, in the during operation, pour the bottle lid into and supply the lid track, so that the bottle lid is under dead weight effect and supply lid track's guide effect along supplying lid track length direction to remove, simultaneously place the plastic bottle on supplying the bottle conveyer belt, and carry the plastic bottle to the blanking mouth under through supplying the bottle conveyer belt, so that the open department of plastic bottle just right the blanking mouth, then push away the bottle lid through pushing away the spacing push pedal of pushing away piece drive, with the bottle lid and push away to blanking mouth department, and fall into the plastic bottle from the blanking mouth in, because blanking mouth internal diameter and bottle lid external diameter just always, at the in-process that the bottle lid falls from the blanking mouth, blanking mouth inner wall will play limiting effect to the whereabouts direction of bottle lid, reduce the appearance bottle lid cover and establish the relative plastic bottle height direction slope in plastic bottle opening department, and then lead to the unable adaptation block's of plastic bottle external screw thread and bottle lid internal thread condition.

Preferably, the cap screwing assembly comprises a telescopic rod, a pressing block rotatably connected to the bottom end of the telescopic rod, a lifting piece for driving the telescopic rod and the pressing block to lift together, and a rotating piece for driving the pressing block to rotate when the pressing block descends to be abutted against the bottle cap; the briquetting is located and supplies bottle conveyer belt top, just supply lid track and briquetting to set up in order along the direction of delivery of bottle conveyer belt.

Through adopting above-mentioned technical scheme, after the bottle lid drops to the plastic bottle, supply bottle conveyer belt to continue to follow the plastic bottle that the conveying direction was had the bottle lid, stop carrying when the plastic bottle that has the bottle lid removed to the briquetting under, drive telescopic link and briquetting through the lifter and move down promptly and move and support the pressure bottle lid towards the direction that is close to the bottle lid, drive the briquetting through the rotation piece and rotate, the bottle lid will rotate along with the briquetting under the effect of briquetting inner wall frictional force this moment to by the screw thread screw up in plastic bottle opening part.

Preferably, a fixing groove for inserting the bottle cap is formed in the bottom end of the pressing block.

Through adopting above-mentioned technical scheme, the setting of fixed slot has increased the contact surface between the briquetting bottle lid, optimizes the drive effect to the bottle lid when briquetting rotation to make the bottle lid can stably rotate under the drive of briquetting, optimize the effect of twisting of cover subassembly to the twisting of bottle lid.

Preferably, the rotating piece comprises rotating rods symmetrically arranged on the periphery of the pressing block, rotating wheels sleeved outside each rotating rod, chain wheels, chains sleeved on the peripheries of all the chain wheels, and a first motor connected with one rotating rod; the first motor driving end is connected to the top end of one of the rotating rods, the chain is in transmission connection with all the chain wheels, a yielding space for the pressing block to be inserted is reserved between all the rotating wheels, and the lifting piece is used for driving the pressing block to move downwards into the inserting yielding space so that the peripheral wall of the pressing block abuts against the peripheral wall of all the rotating wheels.

Through adopting above-mentioned technical scheme, when the briquetting inserts in the space of stepping down, briquetting perisporium can offset with the runner perisporium, starts first motor this moment, and one of them bull stick of first motor drive rotates, and under the drive of sprocket and chain, all bull sticks will spin in the lump to make all runners spin, will drive the briquetting spin when the runner spin.

Preferably, the pushing piece comprises a rotary table, a second motor, a sliding block, a first pull rope, a docking rod, a third motor and a reset piece, wherein the rotary table is rotatably connected to the bottom wall of the cover supply track, the second motor is used for driving the rotary table to rotate, the sliding block is inserted into the rotary table, the first pull rope is connected with the side wall of the sliding block, the docking rod is used for being wound with the first pull rope, the third motor is used for driving the docking rod to rotate; the sliding cavity is arranged inside the turntable, the sliding block is inserted and arranged in the sliding cavity to be connected with the sliding cavity, the linkage cavity communicated with the sliding cavity is further arranged at the bottom of the cover supply track, one end of the pull rope, away from the sliding block, sequentially penetrates through the sliding cavity and the linkage cavity and is connected to the side wall of the butt joint rod, the limit push plate is located on the upper surface of the turntable, the sliding block penetrates through the sliding cavity and is connected with the limit push plate, and the reset piece is used for driving the sliding block to move from the linkage cavity to the sliding cavity.

Through adopting above-mentioned technical scheme, when the bottle lid moves to the carousel along supplying lid track length direction and pastes mutually with spacing push pedal, start the second motor and drive the carousel and rotate 180 degrees, spacing push pedal will rotate along with the carousel this moment, after rotating 180 degrees, spacing push pedal separates the bottle lid on the carousel and the other bottle lids that are located supplying lid track, sliding chamber length direction is located linkage cavity length direction's extension line just this moment, then start the third motor and drive the docking pole rotation, with the stay cord rolling gradually with the docking pole outside, the stay cord will pull the slider this moment, so that the slider slides to the linkage cavity along sliding chamber length direction in, in the slider slip in-process, spacing push pedal slides along with the slider and promotes the bottle lid on the carousel along with being close to the direction removal of blanking mouth, and finally follow and make the bottle lid break away from supplying the lid track from the blanking mouth, rethread reset piece drives the slider and moves to the sliding chamber again in order to make spacing push pedal remove to the carousel again, rethread second motor drives the carousel again and overturns 180 degrees, so that follow-up bottle lid can move to the carousel.

Preferably, the cover closing assembly further comprises two rotating shafts symmetrically connected to the bottom wall of the cover supplying track in a rotating mode, stop rods fixedly connected to the outer portion of each rotating shaft, and a linkage piece, a space for a bottle cover to pass through is reserved between the two stop rods, the linkage piece is used for driving the two rotating shafts to rotate, the rotating directions are opposite, and the bottle cover between the two stop rods moves in the direction away from the rotating disc.

Through adopting above-mentioned technical scheme, when driving the carousel through the second motor and rotating so that spacing push pedal rotates between bottle lid and the other bottle lid on the carousel, drive two bull sticks through the linkage piece and rotate, and make the rotation direction of two pivots opposite, stopper rod tip will contact and push away the bottle lid with the bottle lid under the drive of pivot this moment, and then will supply the bottle lid on the lid track to be promoted down and move towards the direction of keeping away from the carousel, further realize the separation of bottle lid on the carousel and the bottle lid on the lid track, correspondingly, when the second motor drive end is reversed in order to drive the limiting plate and rotate towards the direction that is close to the blanking mouth, drive two pivots rotation through the linkage piece, and make two pin length direction rotate to be on a parallel with the state that supplies lid track length direction, so that the bottle lid between two pin can pass through between two baffles smoothly and move towards the direction that is close to the carousel.

Preferably, the linkage piece comprises a first gear fixedly sleeved outside one rotating shaft, a first rack meshed with the first gear, a second gear fixedly sleeved outside the other rotating shaft, a reversing gear meshed with the second gear, a second rack meshed with the reversing gear, and a tooth block arranged on the peripheral wall of the turntable; the first rack and the second rack are connected to the inner side wall of the cover supply track in a sliding mode along the length direction of the cover supply track, and one ends, close to the turntable, of the first rack and the second rack are meshed with the tooth blocks.

Through adopting above-mentioned technical scheme, when the carousel rotates, the tooth piece will rotate along with the carousel, at this in-process, the tooth piece is all the time with first rack, second rack meshing, consequently, first rack and second rack will be followed and supply lid track length direction reverse slip, simultaneously, first gear and second gear will rotate, and the direction of rotation of second gear will be opposite with the direction of rotation of first gear under the switching-over effect of switching-over gear, two pivots are when the rotation, the rotation direction is opposite promptly, thereby make two pin contacts and support the bottle lid of pushing away between two baffles.

Preferably, a shielding plate is arranged above the cover supply rail close to the turntable, and a channel for the bottle cover to pass through is reserved between the shielding plate and the bottom wall of the cover supply rail.

Through adopting above-mentioned technical scheme, the movable range of carousel has been restricted in the setting of sunshade, prevents that the bottle lid from jumping out to supply to cover orbital condition when receiving the clamp of two pin, towards keeping away from supplying to cover orbital direction.

Preferably, the inner wall of the blanking port is uniformly and rotationally connected with the auxiliary sliding ball along the circumferential direction of the blanking port, and the auxiliary sliding ball is embedded in the inner wall of the blanking port.

Through adopting above-mentioned technical scheme, when the bottle lid falls into the blanking mouth and slides along blanking mouth length direction, the friction between blanking mouth inner wall and the bottle lid perisporium can be reduced in the setting of helping the slip ball for the bottle lid can pass the blanking mouth smoothly.

Preferably, the bottom wall of the cover supply track, which is close to the blanking port, is also provided with a limit baffle, the limit baffle is positioned above the blanking port, and the side wall of the limit baffle, which faces the turntable, is provided with an arc surface consistent with the radian of the inner wall of the blanking port.

Through adopting above-mentioned technical scheme, limit baffle's setting can restrict the removal route of bottle lid on supplying the lid track on the one hand for the bottle lid can stop the antedisplacement in blanking mouth top, on the other hand, because limit baffle's lateral wall is equipped with in the identical cambered surface of blanking mouth inner wall radian, therefore limit baffle can also play the guide effect to the process that the bottle lid falls to in the blanking mouth, further reduces the condition that appears relative plastic bottle direction of height slope when the lid closes on the plastic bottle.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the bottle cap is in operation, the bottle cap is poured into the cap supply track, so that the bottle cap moves along the length direction of the cap supply track under the action of dead weight and the guiding action of the cap supply track, meanwhile, the plastic bottle is placed on the bottle supply conveying belt, and is conveyed to the position right below the blanking port through the bottle supply conveying belt, so that the opening of the plastic bottle is right opposite to the blanking port, then the bottle cap is pushed by the pushing piece to push the limiting push plate, so that the bottle cap is pushed to the blanking port and falls into the plastic bottle from the blanking port, and as the inner diameter of the blanking port and the outer diameter of the bottle cap are right all the time, the inner wall of the blanking port plays a limiting role on the falling direction of the bottle cap in the falling process of the bottle cap from the blanking port, the situation that the bottle cap is sleeved at the opening of the plastic bottle is inclined relative to the height direction of the plastic bottle, and then the external thread of the plastic bottle cap cannot be matched and blocked with the internal thread of the bottle cap is reduced;

2. after the bottle cap falls onto the plastic bottle, the bottle supplying conveyer belt continues to convey the plastic bottle with the bottle cap along the conveying direction until the plastic bottle with the bottle cap moves to the position right below the pressing block, then the lifting piece drives the telescopic rod and the pressing block to move downwards, namely, the bottle cap is moved towards the direction close to the bottle cap and is pressed against the pressing block, and then the rotating piece drives the pressing block to rotate, and at the moment, the bottle cap rotates along with the pressing block under the action of friction force with the inner wall of the pressing block and is screwed at the opening of the plastic bottle.

Drawings

Fig. 1 is a schematic structural view of an automatic cap screwing device for plastic bottles in an embodiment.

Fig. 2 is a sectional view showing an internal structure of the cover supplying rail in the embodiment.

Fig. 3 is a schematic diagram showing a positional relationship between the limit push plate and the blanking port before the turntable is not rotated in the embodiment.

Fig. 4 is a schematic view for embodying the structure of the cap assembly in the embodiment.

Fig. 5 is a schematic diagram showing the positional relationship among the slider, the first string, and the second string in the embodiment.

Fig. 6 is a schematic diagram showing a positional relationship between the limit push plate and the blanking port after the turntable rotates in the embodiment.

Fig. 7 is an enlarged schematic view of the structure of fig. 2 for embodying the point a.

Fig. 8 is a schematic view for embodying the structure of the screw cap assembly in the embodiment.

Reference numerals illustrate: 1. a frame; 2. a cover supply rail; 21. a blanking port; 211. a sliding-assisting ball; 22. a mounting groove; 23. a linkage chamber; 24. a limit baffle; 25. a shutter; 3. a lid assembly; 31. a limit push plate; 32. a pushing member; 321. a turntable; 3211. a sliding chamber; 322. a second motor; 323. a slide block; 324. a first pull rope; 325. a butt joint rod; 326. a third motor; 327. a reset member; 3271. a second pull rope; 3272. winding a connecting rod; 3273. a fourth motor; 328. a gear set; 3281. a main gear; 3282. a slave gear; 33. a rotating shaft; 34. a stop lever; 35. a linkage member; 351. a first gear; 352. a first rack; 353. a second gear; 354. a reversing gear; 355. a second rack; 356. tooth blocks; 4. a bottle supply conveyor belt; 5. a screw cap assembly; 51. a telescopic rod; 52. a lifting member; 53. a rotating member; 531. a rotating rod; 532. a rotating wheel; 533. a sprocket; 534. a chain; 535. a first motor; 54. briquetting; 541. a fixing groove; 6. a bottle cap; 7. a plastic bottle.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-8.

The embodiment of the application discloses an automatic cap screwing device for plastic bottles. Referring to fig. 1 and 2, the automatic cap screwing device for plastic bottles 7 comprises a frame 1, wherein one end of the frame 1 is sequentially provided with a cap supply rail 2 and a bottle supply conveying belt 4 from top to bottom, the bottle supply conveying belt 4 is used for conveying plastic bottles 7, one end of the cap supply rail 2, which is close to the bottle supply conveying belt 4, is obliquely arranged downwards along the conveying direction of the bottle supply conveying belt 4, a blanking port 21 is formed in the bottom wall of the lowest point of the cap supply rail 2 in the height direction in a penetrating manner, the blanking port 21 is used for allowing a bottle cap 6 to fall off the cap supply rail 2, a shielding plate 25 is welded on the upper surface of the cap supply rail 2, which is close to the blanking port 21, and a channel for allowing the bottle cap 6 to pass through is reserved between the shielding plate 25 and the bottom wall of the cap supply rail 2; the other end of the frame 1 is also provided with a cap screwing assembly 5, and the cap screwing assembly 5 is positioned above the bottle feeding conveyor belt 4 and is used for screwing and fixing a bottle cap 6 falling at the bottle mouth of the plastic bottle 7.

Referring to fig. 2, 3 and 4, a cover closing assembly 3 is disposed at the lowest point of the cover supplying rail 2, the cover closing assembly 3 includes a limit push plate 31 and a pushing member 32, the pushing member 32 includes a turntable 321, a second motor 322, a slider 323, a first pull rope 324, a docking rod 325, a third motor 326 and a reset member 327; the bottom wall of the cover supply track 2 is provided with a mounting groove 22, a turntable 321 is inserted into the mounting groove 22, the shell part of a second motor 322 is embedded into the bottom of the mounting groove 22, and the driving end of the second motor 322 is welded on the bottom wall of the turntable 321.

Referring to fig. 4 and 5, the reset element 327 includes a second pull cord 3271, a winding rod 3272, and a fourth motor 3273; the fourth motor 3273 is embedded in the turntable 321, the driving end of the fourth motor 3273 is welded to the end wall of the winding rod 3272, the winding rod 3272 is rotatably connected in the turntable 321, one end of the second pull rope 3271 is fixedly adhered to the side wall of the winding rod 3272, the other end of the second pull rope 3271 is fixedly adhered to the side wall of the sliding block 323, and the sliding block 323 is rod-shaped and made of a material with elastic deformation capability; the inside slip cavity 3211 that supplies slider 323 to slide of seting up of carousel 321, slip cavity 3211 runs through carousel 321 upper surface, and slider 323 runs through slip cavity 3211 and connects in spacing push pedal 31 lower surface, and spacing push pedal 31 is located carousel 321 upper surface, and spacing push pedal 31 transversal arc of personally submitting.

Referring to fig. 3, 4 and 5, a side wall of the slider 323, which is away from the second pull rope 3271, is fixedly adhered to the end of the first pull rope 324, and one end of the first pull rope 324, which is away from the slider 323, penetrates through the turntable 321 and is connected to the side wall of the docking rod 325, and a gap for moving the first pull rope 324 and the second pull rope 3271 is reserved in the mounting groove 22 so as to reduce abrasion of the first pull rope 324 and the second pull rope 3271; the third motor 326 is embedded in the cover supply track 2, and the driving end of the third motor 326 is welded to the end wall of the docking rod 325, so as to drive the docking rod 325 to rotate; the bottom wall of the cover supply track 2 is provided with a linkage chamber 23 for the first stay rope 324 and the sliding block 323 to pass through, the length direction of the linkage chamber 23 is parallel to the length direction of the cover supply track 2, and after the turntable 321 rotates 180 degrees clockwise, the sliding chamber 3211 is communicated with the linkage chamber 23, and at the moment, the length direction of the sliding chamber 3211 is located on an extension line of the length direction of the linkage chamber 23.

Referring to fig. 3, 5 and 6, when the limit push plate 31 is convexly disposed in a direction approaching the blanking port 21 (as shown in fig. 3), the bottle cap 6 moving toward the blanking port 21 is moved onto the turntable 321 at this time, then the turntable 321 is driven to rotate 180 degrees clockwise and stopped so that the limit push plate 31 is concavely disposed in a direction away from the blanking port 21 at this time (as shown in fig. 6), then the third motor 326 and the fourth motor 3273 are simultaneously started so that the docking rod 325 winds the first pull rope 324, the second pull rope 3271 is released by the winding rod 3272, and at this time the slider 323 passes through the sliding chamber 3211 and moves into the linkage chamber 23 under the pull of the first pull rope 324, and at the same time, the bottle cap 6 on the turntable 321 is pushed onto the blanking port 21 by the limit push plate 31 and falls from the blanking port 21.

Referring to fig. 3 and 5, in order to enable the limit push plate 31 to be stably driven by the first pull rope 324 and the second pull rope 3271, in this embodiment, the first pull rope 324 and the second pull rope 3271 are respectively two, and the first pull rope 324 is in one-to-one correspondence with the docking rods 325, and the second pull rope 3271 is in one-to-one correspondence with the connecting rods, so that the docking rods 325 and the connecting rods are respectively two, in order to enable the two docking rods 325 or the two connecting rods to synchronously rotate, gear sets 328 may be respectively disposed between the two docking rods 325 and the two connecting rods, and the gear sets 328 may specifically include a main gear 3281 sleeved outside the connecting rods or the docking rods 325, and a slave gear 3282 meshed with the two main gears 3281.

Referring to fig. 2 and 4, the cap assembly 3 further includes a rotation shaft 33 rotatably coupled to the bottom wall of the cap supply rail 2 symmetrically, a blocking lever 34 fixedly coupled to the outside of each rotation shaft 33, and a link 35, the link 35 including a first gear 351 fixedly coupled to the outside of one of the rotation shafts 33, a first rack 352 engaged with the first gear 351, a second gear 353 fixedly coupled to the outside of the other rotation shaft 33, a reversing gear 354 engaged with the second gear 353, a second rack 355 engaged with the reversing gear 354, and a tooth block 356 provided to the circumferential wall of the turntable 321.

Referring to fig. 3 and 4, the tooth blocks 356 are uniformly arranged along the circumference of the turntable 321, the tooth blocks 356 are simultaneously meshed with the first rack 352 and the second rack 355, the first rack 352 and the second rack 355 are both slidingly connected in the cover supply track 2 along the length direction of the cover supply track 2, and a space for the bottle cap 6 to pass through is reserved between the two stop rods 34; when the turntable 321 is in the state of fig. 3, the length directions of the two stop rods 34 are parallel to each other and to the length direction of the cover supply rail 2, and when the turntable 321 is in the state of fig. 6, the two stop rods 34 are driven by the linkage piece 35 to rotate and push the bottle caps 6, so that the bottle caps 6 which have not moved onto the turntable 321 can be pushed to a direction away from the turntable 321.

Referring to fig. 6, a limit baffle 24 is welded on the bottom wall of the cover supply rail 2 near the blanking port 21, the limit baffle 24 is positioned above the blanking port 21, the limit baffle 24 is concavely arranged in a direction away from the turntable 321 to form an arc, and the arc is consistent with the arc of the blanking port 21; the blanking port 21 is internally connected with a plurality of sliding-assisting balls 211 in a rotating way, all the sliding-assisting balls 211 are uniformly distributed along the circumferential direction of the blanking port 21, when the bottle cap 6 moves to the blanking port 21, the limiting baffle 24 blocks the bottle cap 6 and guides the bottle cap 6 to fall into the blanking port 21, and the sliding-assisting balls 211 smoothly pass through the blanking port 21 and cover the bottle mouth of the plastic bottle 7 right below the blanking port 21.

Referring to fig. 7, the cap screwing assembly 5 includes a telescopic rod 51, a pressing block 54 rotatably connected to the bottom end of the telescopic rod 51 through a bearing, a lifting member 52 for driving the telescopic rod 51 and the pressing block 54 to lift together, and a rotating member 53, wherein the lifting member 52 may be an air cylinder, the cylinder body of the air cylinder is mounted on the frame 1 through a bolt, the driving end of the air cylinder is welded to the upper end of the telescopic rod 51, the telescopic rod 51 is a telescopic structure composed of an outer tube, an inner rod inserted into the outer tube and a spring, the pressing block 54 may be made of rubber, and a fixing groove 541 for inserting the bottle cap 6 is formed in the side wall of the position where the pressing block 54 deviates from the telescopic rod 51.

Referring to fig. 7 and 8, the rotating member 53 includes rotating rods 531 symmetrically disposed at the periphery of the pressing block 54, rotating wheels 532 and sprockets 533 fixedly coupled to the outside of each rotating rod 531, chains 534 coupled to the periphery of all the sprockets 533, and a first motor 535 connected to an end of one of the rotating rods 531; the first motor 535 shell is installed on frame 1, first motor 535 drive end welds in one of them bull stick 531 top, bull stick 531 number of this application embodiment is 4, and all bull sticks 531 all accessible bearing rotation connect in frame 1, sprocket 533 is fixed cup joint in the bull stick 531 be close to the lateral wall of top department, chain 534 is connected with all sprocket 533 transmission, the fixed cup joint in the bull stick 531 is close to the lateral wall of bottom department of bull stick, reserve jointly between all the runners 532 and supply briquetting 54 to insert the space of stepping down, when lifting piece 52 drive briquetting 54 moves down to the space department of stepping down, all runner 532 perisporium all offsets with briquetting 54 perisporium, and be located briquetting 54 bottle lid 6 under will insert the fixed slot 541, start first motor 535 this moment, all runners 532 rotate and drive briquetting 54 and rotate, static friction force between briquetting 54 and the bottle lid 6 makes bottle lid 6 rotate under the drive of briquetting 54, and because the setting up of the telescopic piece makes briquetting 54 in the bottle lid 6 of the butt all the time in the rotation of bottle lid 6, consequently, bottle lid 6 can be screwed in the bottle lid 6 opening department gradually, realize screwing.

The implementation principle of the automatic plastic bottle screwing device is as follows: before working, the motor for controlling the bottle feeding conveyor belt 4 to drive, the first motor 535, the second motor 322, the third motor 326, the fourth motor 3273 and the lifting piece 52 are electrically connected to a peripheral PLC controller, the start and stop of all electrical equipment are controlled by the PLC controller to realize automatic control, then, the plastic bottle 7 without the bottle cap 6 is placed at the starting end of the bottle feeding conveyor belt 4, the bottle cap 6 is poured into the top starting end of the cap feeding track 2, when the plastic bottle 7 is conveyed to the position right below the blanking port 21, the conveying of the bottle feeding conveyor belt 4 is suspended, when any bottle cap 6 moves to the rotary table 321 under the guiding action of the self-weight and the cap feeding track 2, the second motor 322 is started to drive the rotary table 321 to rotate clockwise for 180 degrees, then, the third motor 326 and the fourth motor 3273 are started simultaneously, the bottle cap 6 on the rotary table 321 is pushed to the position of the blanking port 21 through the limit push plate 31, at this time, the bottle cap 6 falls from the blanking port 21 and falls to the position right below the blanking port 21, the motor 326 is controlled to rotate anticlockwise, and then the rotary table 535 is driven to rotate anticlockwise, and the rotary table is reset to rotate for the rotary table 321 to rotate for the third motor 535 to rotate for the rotary table 321; then, the bottle feeding conveyor belt 4 is controlled to move again, so that the plastic bottle 7 with the bottle cap 6 is inserted into the abdication space, namely, is positioned right below the pressing block 54, and the plastic bottle 7 without the bottle cap 6 is moved right below the blanking port 21 at the moment; then, the lifting piece 52 is controlled to drive the pressing block 54 to press against the bottle cap 6, and then the first motor 535 is started to drive the pressing block 54 to rotate, so that the bottle cap 6 is in threaded connection with the opening of the plastic bottle 7, and the automatic screwing operation of the plastic bottle 7 is realized.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. An automatic cap screwing device for plastic bottles comprises a cap supply track (2) for conveying bottle caps (6), a bottle supply conveyor belt (4) for conveying plastic bottles (7), and a cap screwing assembly (5) for screwing the bottle caps (6) to an opening of the plastic bottles (7); the method is characterized in that: the cover supply track (2) is positioned above the bottle supply conveyor belt (4), a blanking port (21) is formed in the bottom wall of the cover supply track (2) in a penetrating manner, and the inner diameter of the blanking port (21) is consistent with the outer diameter of the bottle cover (6); the cover feeding track (2) is further provided with a cover closing assembly (3), the cover closing assembly (3) comprises a limit push plate (31) and a pushing piece (32), the limit push plate (31) is connected to the cover feeding track (2) in a sliding manner along the length direction of the cover feeding track (2), the pushing piece (32) is used for driving the limit push plate (31) to be close to the bottle cover (6) and pushing the bottle cover (6) to the blanking port (21) so that the bottle cover (6) is separated from the cover feeding track (2) from the blanking port (21); the pushing piece (32) comprises a rotary table (321) rotatably connected to the bottom wall of the cover supply track (2), a second motor (322) for driving the rotary table (321) to rotate, a sliding block (323) inserted into the rotary table (321), a first pull rope (324) connected with the side wall of the sliding block (323), a butt joint rod (325) used for being wound with the first pull rope (324), a third motor (326) used for driving the butt joint rod (325) to rotate, and a resetting piece (327); the cover closing assembly (3) further comprises two rotating shafts (33) symmetrically connected to the bottom wall of the cover supplying track (2) in a rotating mode, a stop lever (34) fixedly connected to the outside of each rotating shaft (33), and a linkage piece (35), wherein a space for a bottle cover (6) to pass through is reserved between the two stop levers (34), and the linkage piece (35) is used for driving the two rotating shafts (33) to rotate in opposite rotating directions, so that the bottle cover (6) between the two stop levers (34) moves in a direction away from the turntable (321); the linkage piece (35) comprises a first gear (351) fixedly sleeved outside one rotating shaft (33), a first rack (352) meshed with the first gear (351), a second gear (353) fixedly sleeved outside the other rotating shaft (33), a reversing gear (354) meshed with the second gear (353), a second rack (355) meshed with the reversing gear (354) and a tooth block (356) arranged on the peripheral wall of the rotating disc (321); the first racks (352) and the second racks (355) are connected to the inner side wall of the cover supply track (2) in a sliding mode along the length direction of the cover supply track (2), and one ends, close to the rotating disc (321), of the first racks (352) and the second racks (355) are meshed with the tooth blocks (356).

2. The automatic plastic bottle capping device according to claim 1, wherein: the screwing assembly (5) comprises a telescopic rod (51), a pressing block (54) rotatably connected to the bottom end of the telescopic rod (51), a lifting piece (52) for driving the telescopic rod (51) and the pressing block (54) to lift together, and a rotating piece (53) for driving the pressing block (54) to rotate when the pressing block (54) descends to be abutted against the bottle cap (6); the pressing block (54) is located above the bottle feeding conveyor belt (4), and the cover feeding track (2) and the pressing block (54) are sequentially arranged along the conveying direction of the bottle feeding conveyor belt (4).

3. The automatic plastic bottle capping device according to claim 2, wherein: a fixed groove (541) for inserting the bottle cap (6) is formed in the bottom end of the pressing block (54).

4. The automatic plastic bottle capping device according to claim 2, wherein: the rotating piece (53) comprises rotating rods (531) symmetrically arranged on the periphery of the pressing block (54), rotating wheels (532) sleeved outside each rotating rod (531), chain wheels (533), chains (534) sleeved on the peripheries of all the chain wheels (533), and a first motor (535) connected with one rotating rod (531); the driving end of the first motor (535) is connected to the top end of one of the rotating rods (531), the chain (534) is in transmission connection with all the chain wheels (533), a yielding space for the pressing block (54) to be inserted is reserved between all the rotating wheels (532), and the lifting piece (52) is used for driving the pressing block (54) to move downwards into the inserting yielding space so that the peripheral walls of the pressing block (54) are propped against the peripheral walls of all the rotating wheels (532).

5. The automatic plastic bottle capping device according to claim 1, wherein: the utility model discloses a sliding mechanism for a mobile phone, including carousel (321) and slider (323), slider (323) are inserted and are located in sliding connection in sliding chamber (3211), supply lid track (2) bottom still to be provided with link chamber (23) that link to each other with sliding chamber (3211), one end that slider (323) department was kept away from to first stay cord (324) is passed sliding chamber (3211) and link chamber (23) in proper order and is connected in butt joint pole (325) lateral wall, spacing push pedal (31) are located carousel (321) upper surface, slider (323) run through sliding chamber (3211) and link to each other with spacing push pedal (31), reset piece (327) are used for driving slider (323) and move to in sliding chamber (3211) from link chamber (23).

6. The automatic plastic bottle capping device according to claim 1, wherein: a shielding plate (25) is arranged above the cover supply track (2) close to the turntable (321), and a channel for the bottle cap (6) to pass through is reserved between the shielding plate (25) and the bottom wall of the cover supply track (2).

7. The automatic plastic bottle capping device according to claim 1, wherein: the inner wall of the blanking port (21) is uniformly and rotationally connected with a sliding assisting ball (211) along the circumferential direction of the blanking port (21), and the sliding assisting ball (211) is embedded in the inner wall of the blanking port (21).

8. The automatic plastic bottle capping device according to claim 1, wherein: the bottom wall of the cover supply track (2) close to the blanking port (21) is also provided with a limit baffle (24), the limit baffle (24) is positioned above the blanking port (21), and the side wall of the limit baffle (24) facing the turntable (321) is provided with an arc surface consistent with the radian of the inner wall of the blanking port (21).

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