CN115196566A - Automatic plastic bottle cap screwing device - Google Patents

Abstract

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

Description

Automatic plastic bottle cap screwing device

Technical Field

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

Background

The plastic bottle is mainly used for disposable liquid or solid packaging containers such as beverages, foods, dried fruits, food oil and the like, and has the characteristics of low breakage probability, low cost, high transparency and the like.

The application of the plastic bottle is popularized to the square of people's life and the shadow of the plastic bottle is visible everywhere, when a factory uses the plastic bottle for installation, the step of screwing the plastic bottle cap is an important step, in order to improve the screwing efficiency, the prior Chinese patent application with the application publication number of CN112320719A discloses an automatic screwing device of the plastic bottle cap for industrial production, which comprises a bottom plate, wherein a servo motor and a support are arranged at the top of the bottom plate, a transmission mechanism is arranged between the bottom of the support and an output shaft of the servo motor, a blanking mechanism is arranged at one side of the support, and a screwing mechanism is also arranged between the support and the output end of the servo motor; during operation, a worker pours a bottle cap into the blanking mechanism, conveys the plastic bottle without the bottle cap to the blanking mechanism through the transmission mechanism so as to enable the bottle cap to be covered at the opening of the plastic bottle, conveys the plastic bottle with the bottle cap to the screwing mechanism through the transmission mechanism, and screws the plastic bottle with the bottle cap through the screwing mechanism so as to enable the bottle cap to be stably sleeved on the plastic bottle.

In view of the above-mentioned related technologies, the inventor found that in order to finally screw the plastic bottle and the bottle cap, threads that are mutually matched are generally disposed on an outer side wall of the plastic bottle and an inner wall of the bottle cap, and when the bottle cap is discharged through the discharging mechanism and is sleeved at the opening of the plastic bottle, the bottle cap is prone to tilting relative to the height direction of the plastic bottle, so that the threads on the bottle cap and the plastic bottle are not engaged with each other, and further the subsequent screwing operation between the bottle cap and the plastic bottle by the screwing mechanism is affected.

Disclosure of Invention

In order to make the bottle lid when falling into the plastic bottle uncovered department for the screw thread in the bottle lid can with the screw thread adaptation block on the plastic bottle outer wall, so that going on smoothly of follow-up screw capping operation, this application provides an automatic screw capping device of plastic bottle.

The application provides an automatic screw capping device of plastic bottle adopts following technical scheme:

an automatic plastic bottle cap screwing device comprises a cap supplying track for conveying bottle caps, a bottle supplying conveying belt for conveying plastic bottles, and a cap screwing assembly for screwing the bottle caps and opening the plastic bottles; the cap supplying rail is positioned above the bottle supplying conveyor belt, the bottom wall of the cap supplying rail is provided with a blanking port in a penetrating way, and the inner diameter of the blanking port is consistent with the outer diameter of the bottle cap; the feeding cover 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 feeding cover rail in a sliding mode along the length direction of the feeding cover rail, the pushing piece is used for driving the limiting push plate to be close to the bottle cap, the bottle cap is pushed to the blanking port, and therefore the bottle cap is separated from the feeding cover rail from the blanking port.

Through adopting the above technical scheme, in the during operation, pour the bottle lid into supply and cover in the track, so that the bottle lid moves along supply and cover track length direction under the effect of dead weight and the orbital guide effect of supply lid, place the plastic bottle on supplying the bottle conveyer belt simultaneously, and carry the plastic bottle to under the blanking mouth through supplying the bottle conveyer belt, so that the plastic bottle uncovered department is just to the blanking mouth, after that through supporting the spacing push pedal of pushing away piece drive and supporting and pushing away the bottle lid, so as to push away the bottle lid and support to blanking mouth department, and fall to the plastic bottle in from the blanking mouth, because blanking mouth internal diameter and bottle lid external diameter are always just, in the process of bottle lid whereabouts from the blanking mouth, the blanking mouth inner wall will play limiting displacement to the whereabouts direction of bottle lid, reduce the bottle lid cover and establish relative plastic bottle direction of height slope when the plastic bottle opening part, and then lead to the condition of the unable adaptation block of plastic bottle external screw thread and bottle lid internal thread.

Preferably, the screw cap 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 abut against the bottle cap; the briquetting is located supplies bottle conveyer belt top, just supply lid track and briquetting to set up in order along the direction of delivery who supplies the bottle conveyer belt.

Through adopting above-mentioned technical scheme, after the bottle lid drops on to the plastic bottle, supply the bottle conveyer belt to continue to have the plastic bottle of bottle lid along the direction of delivery conveying, stop carrying when the plastic bottle that has the bottle lid moves under the briquetting, drive telescopic link and briquetting through the lifting unit after that and move down, move towards the direction that is close to the bottle lid promptly and support and press the bottle lid, drive the briquetting through rotating the piece after that and rotate, the bottle lid will rotate along with the briquetting under the effect of briquetting inner wall friction force this moment, and screwed up in the plastic bottle opening part by the screw thread.

Preferably, the bottom end of the pressing block is provided with a fixing groove for the bottle cap to be inserted.

Through adopting above-mentioned technical scheme, seting up of fixed slot has increased the contact surface between the briquetting bottle lid, to the drive effect of bottle lid when optimizing the briquetting rotation to make the bottle lid can carry out the rotation under the drive of briquetting steadily, optimize the effect of twisting of screw capping subassembly to the bottle lid.

Preferably, the rotating part comprises rotating rods symmetrically arranged on the periphery of the pressing block, a rotating wheel and a chain wheel sleeved outside each rotating rod, chains sleeved on the peripheries of all the chain wheels, and a first motor connected with one of the rotating rods; 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 circumferential wall of the pressing block is abutted against the circumferential walls of all the rotating wheels.

Through adopting above-mentioned technical scheme, when the briquetting inserted in the space of stepping down, the 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 carry out the rotation in the lump to make all runner rotations, will drive the briquetting rotation when the runner rotation.

Preferably, the pushing part comprises a rotary disc rotatably connected to the bottom wall of the cover rail, a second motor for driving the rotary disc to rotate, a sliding block inserted in the rotary disc, a first pull rope connected with the side wall of the sliding block, a butt joint rod for winding the first pull rope, a third motor for driving the butt joint rod to rotate, and a resetting part; the inside slip cavity of having seted up of carousel, the slider is inserted and is located to slide and connect in the slip cavity, supply to cover track bottom still to be provided with the linkage cavity that links to each other the intercommunication with the slip cavity, the one end that the slider department was kept away from to the stay cord passes slip cavity and linkage cavity in proper order and is connected in the butt joint pole lateral wall, spacing push pedal is located the carousel upper surface, the slider runs through the slip cavity and links to each other with spacing push pedal, it is used for driving the slider and removes to the slip cavity in from the linkage cavity to reset.

By adopting the technical scheme, when the bottle cap moves to the rotary table along the length direction of the cap supplying track and is attached to the limiting push plate, the second motor is started to drive the rotary table to rotate 180 degrees, the limiting push plate rotates along with the rotary table at the moment, after the rotation of 180 degrees, the limiting push plate separates the bottle cap on the rotary table from other bottle caps on the cap supplying track, the length direction of the sliding cavity is just positioned on the extension line of the length direction of the linkage cavity, then the third motor is started to drive the butt rod to rotate, the pull rope is gradually wound outside the butt rod, the pull rope pulls the sliding block at the moment, so that the sliding block slides to the linkage cavity along the length direction of the sliding cavity, in the sliding process of the sliding block, the limiting push plate slides along with the sliding block and pushes the bottle cap on the rotary table to move towards the direction close to the blanking port, and finally, the bottle cap is separated from the cap supplying track from the blanking port, and finally, the sliding block is driven by the reset piece to move from the linkage cavity again to the sliding cavity, so that the limiting push plate moves to the rotary table again, and finally, the second motor drives the rotary table to turn over 180 degrees again, so that the subsequent bottle cap can move to the rotary table.

Preferably, the cap closing assembly further comprises two rotating shafts symmetrically and rotatably connected to the bottom wall of the cap supplying rail, stop rods fixedly connected to the outer portions of the rotating shafts, and a linkage member, a space for the bottle cap to pass through is reserved between the two stop rods, the linkage member is used for driving the two rotating shafts to rotate, and the rotating directions of the two rotating shafts are opposite, so that the bottle cap between the two stop rods moves towards the direction far 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 other bottle lids on the carousel, drive two bull sticks through the linkage and rotate, and make the direction of rotation of two pivots opposite, this moment the fender rod tip will be under the drive of pivot with the bottle lid contact and support the push away bottle lid, and then will supply the bottle lid on the lid track to be promoted down to the direction of keeping away from the carousel and move, further realize the separation of the bottle lid on the carousel and the bottle lid that supplies on the lid track, it is corresponding, when the reversal of second motor drive end is rotated in order to drive the limiting plate towards the direction of being close to the blanking mouth, drive two pivot rotations through the linkage, and make two fender rod length direction rotate to the state that is on a parallel with supplying lid track length direction, so that the bottle lid between two fender rods can pass through smoothly between two baffles and towards the direction removal of being close to the carousel.

Preferably, the linkage piece comprises a first gear fixedly sleeved outside one of the rotating shafts, 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 supplying track in a sliding mode along the length direction of the cover supplying track, and one ends, close to the turntable, of the first rack and the second rack are meshed with the toothed block.

Through adopting above-mentioned technical scheme, when the carousel rotated, the tooth piece will rotate along with the carousel in the lump, at this in-process, the tooth piece all the time with first rack, the meshing of second rack, consequently, first rack and second rack will be followed and supply to cover the reverse slip of track length direction, and meanwhile, 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 pivot are in the rotation promptly, the rotation opposite direction, thereby make two pin contacts and support the bottle lid that pushes away between two baffles.

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

Through adopting above-mentioned technical scheme, the setting up of sunshade has restricted the home range of carousel, prevents that the bottle lid from when receiving the clamp of two pin, jumping to deviate from towards the orientation of keeping away from supplying the lid track and supplying the orbital condition of lid.

Preferably, the inner wall of the blanking port is uniformly connected with the sliding assisting balls in a rotating mode along the circumferential direction of the blanking port, and the sliding assisting balls are embedded in the inner wall of the blanking port.

By adopting the technical scheme, when the bottle cap falls into the blanking port and slides along the length direction of the blanking port, the friction between the inner wall of the blanking port and the peripheral wall of the bottle cap can be reduced by the aid of the sliding balls, so that the bottle cap can smoothly penetrate through the blanking port.

Preferably, the bottom wall of the cover supplying track close to the blanking port is further provided with a limiting baffle, the limiting baffle is located above the blanking port, and the side wall of the limiting baffle facing the turntable is provided with a cambered 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 bottle lid on supplying the removal distance of covering on the track on the one hand for the bottle lid can stop the antedisplacement in blanking mouth top, and on the other hand, because limit baffle's lateral wall is equipped with the cambered surface unanimous in blanking mouth inner wall radian, consequently limit baffle can also play the guide effect to the process of bottle lid whereabouts to the blanking mouth, further reduces the condition that relative plastic bottle direction of height slope appears when the bottle lid fits on the plastic bottle appearing.

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

1. when the automatic bottle cap dropping device works, a bottle cap is poured into the cap supplying track, so that the bottle cap moves along the length direction of the cap supplying track under the self-weight action and the guiding action of the cap supplying track, meanwhile, a plastic bottle is placed on the bottle supplying conveyor belt, the plastic bottle is conveyed to the position under the blanking port through the bottle supplying conveyor belt, so that the opening of the plastic bottle is opposite to the blanking port, then, the bottle cap is pushed to the blanking port by driving the limiting push plate through the pushing piece, and falls into the plastic bottle from the blanking port, because the inner diameter of the blanking port is just the same as the outer diameter of the bottle cap, in the process that the bottle cap falls from the blanking port, the inner wall of the blanking port can limit the falling direction of the bottle cap, and the situation that the bottle cap is inclined relative to the height direction of the plastic bottle when being sleeved at the opening of the plastic bottle is reduced, and further the outer thread of the plastic bottle cannot be matched and clamped with the inner thread of the bottle cap is caused;

2. after the bottle lid drops on the plastic bottle, supply the bottle conveyer belt to continue to have the plastic bottle of bottle lid along direction of delivery conveying, stop carrying when the plastic bottle that has the bottle lid moves under the briquetting until, drive telescopic link and briquetting through the lift spare after that and move down, move and support the pressure bottle lid towards the direction that is close to the bottle lid promptly, drive the briquetting through rotating the piece after that and rotate, the bottle lid will rotate along with the briquetting under the effect of the inner wall friction force of briquetting this moment to be screwed up in the plastic bottle opening part by the screw thread.

Drawings

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

Fig. 2 is a sectional view for embodying the internal structure of the cover rail in the embodiment.

Fig. 3 is a schematic diagram for showing the position relationship between the limiting push plate and the blanking port before the turntable does not rotate in the embodiment.

Fig. 4 is a schematic diagram for embodying the structure of the cover closing assembly in the embodiment.

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

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

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

Figure 8 is a schematic diagram of an embodiment for embodying the screw cap assembly structure.

Description of reference numerals: 1. a frame; 2. a supply cover rail; 21. a blanking port; 211. a sliding-assisting ball; 22. mounting grooves; 23. a linkage chamber; 24. a limit baffle; 25. a shutter; 3. a cover closing assembly; 31. a limiting push plate; 32. a pushing member; 321. a turntable; 3211. a sliding chamber; 322. a second motor; 323. a slider; 324. a first pull cord; 325. a docking rod; 326. a third motor; 327. a reset member; 3271. a second pull cord; 3272. a winding 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. a tooth block; 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. fixing grooves; 6. a bottle cap; 7. a plastic bottle.

Detailed Description

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

The embodiment of the application discloses automatic screw capping device of plastic bottle. Referring to fig. 1 and 2, the automatic plastic bottle 7 cap screwing device comprises a frame 1, wherein one end of the frame 1 is sequentially provided with a cap supplying track 2 and a bottle supplying conveyer belt 4 from top to bottom, the bottle supplying conveyer belt 4 is used for conveying plastic bottles 7, one end of the cap supplying track 2 close to the bottle supplying conveyer belt 4 is arranged in a downward inclination mode along the conveying direction of the bottle supplying conveyer belt 4, a blanking port 21 penetrates through the bottom wall of the lowest point of the cap supplying track 2 in the height direction, the blanking port 21 is used for enabling bottle caps 6 to fall and separate from the cap supplying track 2, a shielding plate 25 is welded on the upper surface of the cap supplying track 2 close to the blanking port 21, and a channel for the bottle caps 6 to pass through is reserved between the shielding plate 25 and the bottom wall of the cap supplying track 2; the other end of the rack 1 is also provided with a screwing cover component 5, and the screwing cover component 5 is positioned above the bottle conveying belt 4 and used for screwing and fixing a bottle cap 6 falling at the bottleneck of a plastic bottle 7 at the bottleneck of the plastic bottle 7.

Referring to fig. 2, 3 and 4, a cover closing assembly 3 is arranged at the lowest point of the cover supplying track 2, the cover closing assembly 3 comprises a limiting push plate 31 and a pushing part 32, and the pushing part 32 comprises a rotary disc 321, a second motor 322, a sliding block 323, a first pull rope 324, a butt joint rod 325, a third motor 326 and a reset part 327; the supply to cover 2 diapire and seted up mounting groove 22, carousel 321 inserts and locates in mounting groove 22, and second motor 322 casing position inlays in the bottom of mounting groove 22 groove, and the drive end of second motor 322 welds in carousel 321 diapire.

Referring to fig. 4 and 5, the restoring member 327 includes a second pulling rope 3271, a wrapping rod 3272, and a fourth motor 3273; the fourth motor 3273 is embedded in the turntable 321, a driving end of the fourth motor 3273 is welded to an end wall of the wrapping rod 3272, the wrapping rod 3272 is rotatably connected in the turntable 321, one end of the second pulling rope 3271 is fixedly adhered to a side wall of the wrapping rod 3272, the other end of the second pulling rope 3271 is fixedly adhered to a 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 the slider 323 to slide that offers of carousel 321, slip cavity 3211 runs through the 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 the carousel 321 upper surface, and spacing push pedal 31 transversal personally submits the arc.

Referring to fig. 3, 4 and 5, a side wall of the slider 323 at a position away from the second pulling rope 3271 is fixedly adhered to an end of the first pulling rope 324, one end of the first pulling rope 324 at a position away from the slider 323 penetrates through the turntable 321 and is connected to a side wall of the docking rod 325, and a gap for the first pulling rope 324 and the second pulling rope 3271 to move is reserved in the mounting groove 22, so that abrasion of the first pulling rope 324 and the second pulling rope 3271 is reduced; the third motor 326 is embedded in the cover supplying track 2, and the driving end of the third motor 326 is welded to the end wall of the docking rod 325 for driving the docking rod 325 to rotate; the bottom wall of the cover supplying track 2 is provided with a linkage chamber 23 for the first pulling 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 supplying track 2, and after the rotating disc 321 rotates clockwise 180 degrees, the sliding chamber 3211 is communicated with the linkage chamber 23, and the length direction of the sliding chamber 3211 is located on the extension line of the length direction of the linkage chamber 23.

Referring to fig. 3, 5 and 6, when the limit pushing plate 31 is disposed to protrude toward the direction close to the blanking opening 21 (as shown in fig. 3), it is an initial state of the limit pushing plate 31, at this time, the bottle cap 6 moving toward the direction close to the blanking opening 21 will move onto the rotating disc 321, then the rotating disc 321 is driven to rotate clockwise by 180 degrees and stop, so that the limit pushing plate 31 is disposed to recess toward the direction away from the blanking opening 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 abutting rod 325 winds the first pulling rope 324, the winding rod 3272 releases the second pulling rope 3271, at this time, the slider 323 will pass through the sliding chamber 3211 and move into the linkage chamber 23 under the pulling of the first pulling rope 324, and at the same time, the bottle cap 6 on the rotating disc 321 will be pushed above the blanking opening 21 by the limit pushing plate 31 and fall from the blanking opening 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, the first pull rope 324 and the second pull rope 3271 in the embodiment of the present invention are respectively two, the first pull rope 324 corresponds to the docking rod 325, the second pull rope 3271 corresponds to the connecting rod, and thus the docking rod 325 and the connecting rod are respectively two, in order to enable the two docking rods 325 or the two connecting rods to rotate synchronously, a gear set 328 may be respectively disposed between the two docking rods 325 and the two connecting rods, and the gear set 328 may specifically include a main gear 3281 sleeved outside the connecting rod or the docking rod 325, and a sub-gear 3282 engaged with the two main gears 3281.

Referring to fig. 2 and 4, the cover closing assembly 3 further includes rotating shafts 33 symmetrically rotatably connected to the bottom wall of the cover rail 2, a stop lever 34 fixedly sleeved outside each rotating shaft 33, and a linkage member 35, wherein the linkage member 35 includes a first gear 351 fixedly sleeved outside one of the rotating shafts 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 disposed on the peripheral wall of the rotating disc 321.

Referring to fig. 3 and 4, the tooth blocks 356 are uniformly arranged along the circumferential direction of the rotating disc 321, the tooth blocks 356 are simultaneously engaged with the first rack 352 and the second rack 355, the first rack 352 and the second rack 355 are slidably connected in the cap supplying track 2 along the length direction of the cap supplying 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 shown in fig. 3, the two blocking rods 34 are parallel to each other in the length direction and parallel to the length direction of the cap supplying track 2, and when the turntable 321 is in the state shown in fig. 6, the two blocking rods 34 are driven by the linkage 35 to rotate and push against the caps 6, so that the caps 6 which are not moved onto the turntable 321 can be pushed away from the turntable 321.

Referring to fig. 6, a limiting baffle 24 is welded on the bottom wall of the cover supplying track 2 near the blanking port 21, the limiting baffle 24 is located above the blanking port 21, the limiting baffle 24 is recessed towards the direction far away from the turntable 321 to form an arc, and the arc radian is consistent with the radian of the blanking port 21; the inside rotation of blanking mouth 21 is connected with a plurality of and helps smooth ball 211, and whole help smooth ball 211 evenly distributed along blanking mouth 21 circumference, and when bottle lid 6 moved to blanking mouth 21 department, limit baffle 24 stopped and guided bottle lid 6 and fell to blanking mouth 21 in to smooth and easy passing through blanking mouth 21 and the lid is established at the plastic bottle 7 bottleneck department that is located directly below blanking mouth 21 under the effect that helps smooth ball 211.

Referring to fig. 7, the screw capping assembly 5 includes an expansion link 51, a pressing block 54 connected to the bottom end of the expansion link 51 is rotated through a bearing, a lifting member 52 used for driving the expansion link 51 and the pressing block 54 to lift in the lump, and a rotating member 53, the lifting member 52 can be a cylinder, the cylinder body is installed on the rack 1 through a bolt, the cylinder driving end is welded on the upper end of the expansion link 51, the expansion link 51 is an outer tube, an inner rod inserted in the outer tube and a telescopic structure composed of a spring are inserted, the pressing block 54 can be made of rubber, and a fixing groove 541 for inserting the bottle cap 6 is formed in the side wall of the pressing block 54 deviated from the expansion link 51.

Referring to fig. 7 and 8, the rotating member 53 includes rotating rods 531 symmetrically disposed on the periphery of the pressing block 54, a rotating wheel 532 and a chain wheel 533 fixedly sleeved on the outer side of each rotating rod 531, a chain 534 sleeved on the periphery of all the chain wheels 533, and a first motor 535 connected to the end of one rotating rod 531; the first motor 535 is installed on the frame 1, the driving end of the first motor 535 is welded to the top end of one of the rotating rods 531, the number of the rotating rods 531 is 4 in the embodiment of the present application, and all the rotating rods 531 can be rotatably connected to the frame 1 through bearings, the chain wheel 533 is fixedly sleeved on the side wall of the rotating rod 531 near the top, the chain 534 is in transmission connection with all the chain wheels 533, the rotating rods 532 are fixedly sleeved on the side wall of the rotating rod 531 near the bottom, a abdicating space for the pressing block 54 to be inserted is reserved between all the rotating rods 532, when the lifting member 52 drives the pressing block 54 to move down to the abdicating space, the circumferential wall of all the rotating rods 532 is abutted against the circumferential wall of the pressing block 54, and the bottle cap 6 located right below the pressing block 54 is inserted into the fixing groove 541, at this time, the first motor 535 is started, all the rotating rods 532 rotate and drive the pressing block 54 to rotate, the static friction force between the pressing block 54 and the bottle cap 6 causes the bottle cap 6 to rotate under the driving of the pressing block 54, and the pressing block 54 and the bottle cap 6 is always abutted against the rotating in the rotating process due to the arrangement of the telescopic member, so that the bottle cap 6 can be gradually screwed to the bottle cap 6 at the opening to realize screwing.

The implementation principle of the automatic capping device for the plastic bottle in the embodiment of the application is as follows: before working, a motor for controlling transmission of the bottle conveying belt 4, a first motor 535, a second motor 322, a third motor 326, a fourth motor 3273 and the lifting piece 52 can be electrically connected to an external PLC controller, start and stop of all electrical equipment are controlled by the PLC controller to realize automatic control, then plastic bottles 7 without bottle caps 6 are placed at the starting end of the bottle conveying belt 4, the bottle caps 6 are poured into the starting end of the top of the cap supplying track 2, when the plastic bottles 7 are conveyed to the position under the blanking port 21, conveying of the bottle conveying belt 4 is suspended, when any bottle cap 6 moves to the turntable 321 under the self-weight effect and the guiding effect of the cap supplying track 2, the second motor 322 is started to drive the turntable 321 to rotate 180 degrees clockwise and then stop, the third motor 326 and the fourth motor 3273 are simultaneously started, the plastic bottles 6 on the turntable 321 are pushed to the blanking port 21 through the limiting push plate 31, at this time, the bottle caps 6 fall from the blanking port 21 and fall to the position under the blanking port 21, then the opening 327 under the blanking port 21 is controlled by the third motor 3273 to control the driving shaft to rotate counterclockwise, and the plastic bottles are reset plate 321 to drive the material pushing plate 326 and the rotating plate 326 to rotate counterclockwise again, and then the driving shaft 3273 to drive the plastic bottles to reset plate 321 to reset by the first motor 321; then, the bottle supply conveyor belt 4 is controlled to move again, so that the plastic bottles 7 with the bottle caps 6 are inserted into the abdicating space, namely, right below the pressing block 54, and the subsequent plastic bottles 7 without the bottle caps 6 move right below the blanking port 21; then, the lifting member 52 is controlled to drive the pressing block 54 to abut 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 cap screwing operation of the plastic bottle 7 is realized.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. An automatic plastic bottle cap screwing device comprises a cap supply rail (2) for conveying bottle caps (6), a bottle supply conveyor belt (4) for conveying plastic bottles (7), and a cap screwing component (5) for screwing the bottle caps (6) and the openings of the plastic bottles (7); the method is characterized in that: the cap supplying rail (2) is positioned above the bottle supplying conveyor belt (4), a blanking port (21) is formed in the bottom wall of the cap supplying rail (2) in a penetrating mode, and the inner diameter of the blanking port (21) is consistent with the outer diameter of the bottle cap (6); supply to cover still to be provided with on the track (2) and close and cover subassembly (3), close and cover subassembly (3) including spacing push pedal (31) and support and push away piece (32), spacing push pedal (31) slide along supplying to cover track (2) length direction and connect on supplying to cover track (2), support and push away piece (32) and be used for driving spacing push pedal (31) and press close to bottle lid (6) to support bottle lid (6) and push away to blanking mouth (21) department, so that bottle lid (6) break away from and supply to cover track (2) from blanking mouth (21).

2. Automatic capping device for plastic bottles according to claim 1, characterized in that: the screw cap component (5) comprises an expansion link (51), a pressing block (54) rotationally connected to the bottom end of the expansion link (51), a lifting piece (52) used for driving the expansion link (51) and the pressing block (54) to lift together, and a rotating piece (53) used for driving the pressing block (54) to rotate when the pressing block (54) descends to abut against the bottle cap (6); the pressing block (54) is positioned above the bottle supplying conveying belt (4), and the cover supplying track (2) and the pressing block (54) are sequentially arranged along the conveying direction of the bottle supplying conveying belt (4).

3. Automatic capping device for plastic bottles according to claim 2, characterized in that: the bottom end of the pressing block (54) is provided with a fixing groove (541) for the bottle cap (6) to be inserted.

4. Automatic capping device for plastic bottles according to claim 2, characterized in that: the rotating part (53) comprises rotating rods (531) symmetrically arranged on the periphery of the pressing block (54), a rotating wheel (532) and a chain wheel (533) sleeved outside each rotating rod (531), chains (534) sleeved on the periphery 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), an abdicating 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 to the insertion abdicating space, so that the peripheral wall of the pressing block (54) is abutted against the peripheral walls of all the rotating wheels (532).

5. Automatic capping device for plastic bottles according to claim 1, characterized in that: the pushing part (32) comprises a rotary disc (321) which is rotatably connected to the bottom wall of the cover rail (2), a second motor (322) which is used for driving the rotary disc (321) to rotate, a sliding block (323) which is inserted into the rotary disc (321), a first pull rope (324) which is connected with the side wall of the sliding block (323), a butt joint rod (325) which is used for winding the first pull rope (324), a third motor (326) which is used for driving the butt joint rod (325) to rotate, and a resetting part (327); the inside slip cavity (3211) of having seted up of carousel (321), slider (323) are inserted and are located to slide and connect in slip cavity (3211), supply to cover track (2) bottom still to be provided with the linkage cavity (23) that link to each other the intercommunication with slip cavity (3211), the one end that slider (323) department was kept away from in first stay cord (324) passes slip cavity (3211) and linkage cavity (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 slip cavity (3211) and link to each other with spacing push pedal (31), reset piece (327) are used for driving slider (323) and move to slip cavity (3211) from linkage cavity (23).

6. Automatic capping device for plastic bottles according to claim 5, characterized in that: close and cover subassembly (3) still include two symmetry ground rotate connect in the pivot (33) that supply to cover track (2) diapire, fixedly connected in each outside pin (34) of pivot (33), and linkage (35), two reserve the space that supplies bottle lid (6) to pass between pin (34), linkage (35) are used for driving two pivot (33) rotations, and rotate opposite direction to make bottle lid (6) between two pin (34) remove towards the direction of keeping away from carousel (321).

7. Automatic capping device for plastic bottles according to claim 6, characterized in that: the linkage piece (35) comprises a first gear (351) fixedly sleeved outside one of the rotating shafts (33), a first rack (352) meshed and connected 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 rotary table (321); the first rack (352) and the second rack (355) are connected to the inner side wall of the cover supplying track (2) in a sliding mode along the length direction of the cover supplying track (2), and one ends, close to the turntable (321), of the first rack (352) and the second rack (355) are meshed with the gear block (356).

8. Automatic capping device for plastic bottles according to claim 1, characterized in that: the cover supplying device is characterized in that a shielding plate (25) is arranged above the position, close to the turntable (321), of the cover supplying track (2), 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 supplying track (2).

9. Automatic capping device for plastic bottles according to claim 1, characterized in that: the inner wall of the blanking port (21) is uniformly and rotatably connected with the sliding assisting balls (211) along the circumferential direction of the blanking port (21), and the sliding assisting balls (211) are embedded in the inner wall of the blanking port (21).

10. Automatic capping device for plastic bottles according to claim 1, characterized in that: supply the diapire that lid track (2) are close to blanking mouth (21) department still to be provided with limit baffle (24), limit baffle (24) are located blanking mouth (21) top, limit baffle (24) are provided with the cambered surface unanimous with blanking mouth (21) inner wall radian towards the lateral wall of carousel (321) department.

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