CN218114660U - Packaging tape winding machine and tensioning mechanism - Google Patents

Abstract

The utility model discloses a packing area rolling machine and tight mechanism that rises relates to rolling machine technical field, tight mechanism that rises is including being fixed in the epaxial first tight pulley that rises of main, the third tight pulley that rises, and the activity locates the epaxial second tight pulley that rises, the fourth tight pulley that rises, be equipped with the fifth drive source on the third tight pulley that rises, the extrusion of fifth drive source drive second tight pulley that rises toward the first tight pulley that rises direction, be located the second tight pulley that rises and the first tight pulley that rises first elastic component between receive the extrusion back evagination in the barrel casing inner wall, the second tight pulley that rises extrudees toward the third tight pulley direction through connecting rod pulling fourth tight pulley that rises, be located the third tight pulley that rises and the fourth tight pulley that rises second elastic component between receive the extrusion back evagination in the barrel casing inner wall. The first tension spring between the second tension wheel and the first tension wheel protrudes and props up the inner wall of the cylinder sleeve after being extruded, and the second tension spring between the third tension wheel and the fourth tension wheel protrudes and props up the inner wall of the cylinder sleeve after being extruded, so that the cylinder sleeves with different lengths can be tensioned.

Description

Packaging tape winding machine and tensioning mechanism

Technical Field

The utility model relates to a rolling machine technical field, specifically speaking relate to a packing belt rolling machine and tight mechanism that rises.

Background

Similar prior art wrap-around machines are disclosed in the following patent documents.

Chinese utility model patent specification CN 204297741U (published 2015 04/29) discloses a packaging tape winder, which comprises a case, the case on be equipped with a roll core loading attachment, still include the clamping device that a core was rolled up to the centre gripping, clamping device still include one and maintain a core pivoted and roll up core rotating-structure, still include a guide manipulator, guide manipulator one end connect the guide arm of a control manipulator motion. The packaging tape winder has the advantages of low manufacturing cost, more stable winding section and simpler operation; the tail end of the packaging belt is nailed on the packaging belt coil, and the whole packaging belt coil cannot be scattered in the carrying process.

However, the clamping device disclosed above requires the left and right clamping pieces to be arranged when clamping the barrel casing, which is relatively complex in structure, and the left and right clamping pieces need to be adjusted if the barrel casings of different sizes need to be clamped, which is inconvenient in use.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a strap rolling machine and tight mechanism that rises to there is the structure in the clamping device who overcomes among the prior art complicated relatively, and if need the not barrel casing of equidimension of centre gripping then need adjust about to the holding piece, causes to use inconvenient defect.

In order to solve the technical problem, the utility model discloses a tight mechanism that rises is including being fixed in the epaxial first tight pulley that rises, the third tight pulley that rises to and the activity is located epaxial second tight pulley that rises, the fourth tight pulley that rises, be equipped with the fifth driving source on the third tight pulley that rises, the extrusion of fifth driving source drive second tight pulley that rises toward the first tight pulley direction that rises, and the first elastic component that is located between second tight pulley that rises and the first tight pulley that rises receives the extrusion back evagination in the barrel casing inner wall, and the second tight pulley that rises pulls the fourth tight pulley through the connecting rod and extrudees toward the third tight pulley direction that rises, and the second elastic component that is located between third tight pulley that rises and the fourth tight pulley that rises receives the extrusion back evagination in the barrel casing inner wall.

The first tensioning wheel is provided with a first oblique angle, the second tensioning wheel is provided with a second oblique angle, a circle of first elastic piece is arranged on the first oblique angle and the second oblique angle in a surrounding mode, the third tensioning wheel is provided with a third oblique angle, the fourth tensioning wheel is provided with a fourth oblique angle, and a circle of second elastic piece is arranged on the third oblique angle and the fourth oblique angle in a surrounding mode.

Wherein, first elastic component is first extension spring.

Wherein, the second elastic component is a second tension spring.

Wherein the fifth driving source is a fifth cylinder.

The utility model discloses a packaging tape winding machine, which comprises a frame, wherein a conveying mechanism for conveying a sleeve to a sleeve opening is arranged on the frame; the first pushing mechanism pushes the barrel sleeve onto the barrel sleeve clamping mechanism, the barrel sleeve clamping mechanism clamps the barrel sleeve to a barrel core sleeve opening position, when the second pushing mechanism pushes the barrel core sleeve mechanism into the barrel sleeve, a tensioning mechanism in the barrel core sleeve mechanism tightly tensions the barrel sleeve, a tension mechanism conveys the packaging belt to a packaging belt guiding mechanism, the packaging belt guiding mechanism conveys the packaging belt into the barrel sleeve, a pressing mechanism in the tensioning mechanism tightly presses the packaging belt into the barrel sleeve, when the barrel core sleeve mechanism rotates, the packaging belt is wound on the barrel sleeve, and the packaging belt is cut off by a fusing mechanism after being wound; the tensioning mechanism comprises a first tensioning wheel and a third tensioning wheel which are fixed on the main shaft, a second tensioning wheel and a fourth tensioning wheel which are movably arranged on the main shaft, a fifth driving source is arranged on the third tensioning wheel, the fifth driving source drives the second tensioning wheel to extrude towards the first tensioning wheel, a first elastic part between the second tensioning wheel and the first tensioning wheel is protruded outwards to push against the inner wall of the cylinder sleeve after being extruded, the second tensioning wheel pulls the fourth tensioning wheel to extrude towards the direction of the third tensioning wheel through a connecting rod, and a second elastic part between the third tensioning wheel and the fourth tensioning wheel is protruded outwards to push against the inner wall of the cylinder sleeve after being extruded.

The first tensioning wheel is provided with a first oblique angle, the second tensioning wheel is provided with a second oblique angle, a circle of first elastic piece is arranged on the first oblique angle and the second oblique angle in a surrounding mode, the third tensioning wheel is provided with a third oblique angle, the fourth tensioning wheel is provided with a fourth oblique angle, and a circle of second elastic piece is arranged on the third oblique angle and the fourth oblique angle in a surrounding mode.

Wherein, first elastic component is first extension spring.

Wherein, the second elastic component is a second tension spring.

Wherein the fifth driving source is a fifth cylinder.

Compared with the prior art, the beneficial effects of the utility model are that simple structure, when the barrel casing is located the tight mechanism that rises, fifth cylinder drive second tight pulley that rises extrudees toward first tight pulley direction that rises, and the first extension spring that is located between second tight pulley that rises and the first tight pulley that rises receives the extrusion back evagination top in the barrel casing inner wall, and the second tight pulley that rises extrudees toward third tight pulley direction through connecting rod pulling fourth tight pulley that rises, and the second extension spring that is located between third tight pulley that rises and the fourth tight pulley that rises receives the extrusion back evagination top in the barrel casing inner wall, consequently can rise to the barrel casing of multiple not length size and tightly.

Drawings

FIG. 1 is a schematic perspective view of the packaging tape winder of the present invention;

FIG. 2 is a schematic view of a first partial perspective of the packaging tape winder of the present invention;

FIG. 3 is a schematic view of a second partial perspective structure of the packaging tape winder of the present invention;

fig. 4 is a schematic perspective view of the first pushing mechanism of the present invention;

FIG. 5 is a schematic perspective view of the packaging tape guide mechanism of the present invention;

fig. 6 is a schematic view of a first three-dimensional structure of the cartridge holder according to the present invention;

fig. 7 is a schematic view of a second three-dimensional structure of the cartridge holder according to the present invention;

fig. 8 is a schematic perspective view of the angle adjusting mechanism of the present invention;

fig. 9 is a schematic perspective view of a second pushing mechanism of the present invention;

fig. 10 is a schematic perspective view of the cartridge holder mechanism of the present invention;

fig. 11 is a schematic perspective view of the pressing mechanism of the present invention;

fig. 12 is a schematic view of the three-dimensional structure of the tension mechanism of the present invention;

fig. 13 is a schematic view of the tension mechanism of the present invention with the tension spring removed;

FIG. 14 is a schematic perspective view of a sleeve of the packaging tape winder in the core sleeve mechanism of the present invention;

FIG. 15 is a schematic view of the structure of the packaging tape winder in use;

fig. 16 is a first schematic sectional view of the packaging tape winder in use according to the present invention;

FIG. 17 is a schematic view of a second cross-sectional view of the packaging tape winder of the present invention in use;

fig. 18 is a schematic view of the structure of the present invention in partial section in the use state of the packaging tape winder.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The packaging tape winding machine of the embodiment is as shown in fig. 1-18, and comprises a frame 1, wherein a conveying mechanism 4 for conveying a sleeve 2 to a sleeve opening 3 is arranged on the frame, the conveying mechanism comprises an inclined passageway 5 and a falling channel 6 communicated with the inclined passageway, the sleeve opening is communicated with the falling channel, two extension rods 7 and 8 are arranged on the sleeve opening, the sleeve is sequentially placed on the inclined passageway and is influenced by gravity, the sleeve can automatically roll from the inclined passageway to the falling channel and then from the falling channel to the sleeve opening, and the two extension rods on the sleeve opening just receive the sleeve. First push mechanism 9 is with the barrel casing propelling movement on barrel casing fixture 10, and first push mechanism is located the frame and is located barrel casing mouth rear portion, and first push mechanism is equipped with seventh cylinder 12 including being fixed in the inside backup pad 11 of frame in the backup pad, is equipped with circular push pedal 13 on the seventh cylinder, and the circular push pedal of seventh cylinder promotion, circular push pedal promote the barrel casing to the barrel casing fixture on, and after the propelling movement finishes, the circular push pedal of seventh cylinder promotion rolls back, and new barrel casing rolls once more to the barrel casing mouth.

The barrel casing fixture of this embodiment is including locating the inside first cylinder 14 of frame, the articulated fixed plate 15 of first cylinder, fixed axis of rotation 16 of fixed plate, the axis of rotation is worn to establish the frame through the bearing and is connected with swing arm 17, and the axis of rotation is worn to establish supporting shoe 18 through the bearing, and the supporting shoe is fixed in the frame, and first cylinder drive axis of rotation reciprocating rotation, axis of rotation transmission swing arm reciprocating rotation are equipped with centre gripping subassembly 19 on the swing arm. The centre gripping subassembly includes base plate 20, swing arm and substrate connection, be equipped with wide type finger cylinder 21 on the base plate, wide type finger cylinder drives fixture 22 respectively, fixture 23 opens or presss from both sides tightly down, goes up fixture or fixture includes arc piece 24 down, is equipped with two clamping bars 25, 26 on the arc piece. The centre gripping subassembly still includes left cylinder 27, right cylinder 28, and the base plate left and right sides is located respectively to left cylinder, right cylinder, is equipped with toper rubber sleeve 29 on left cylinder, the right cylinder respectively, when first push mechanism pushes barrel casing propelling movement on barrel casing fixture, left cylinder, right cylinder block the barrel casing in order to inject its propelling movement distance. In order to ensure the stability of the barrel sleeve clamping mechanism when clamping the barrel sleeve to the position of the barrel core looping 30, a balance rod 31 is hinged to the supporting block, a connecting plate 32 is hinged to the balance rod, and the connecting plate is fixed to the clamping assembly. Circular push pedal promotes the barrel casing and is close to the centre gripping subassembly along two extension poles, and after being close to suitable centre gripping distance, thereby left cylinder, right cylinder promote the toper rubber sleeve and block its propelling movement distance in order to injecing the barrel casing. Then the left air cylinder and the right air cylinder retract into the conical rubber sleeve, and the wide finger air cylinder drives the upper clamping mechanism and the lower clamping mechanism respectively to clamp the barrel sleeve. The first cylinder drives the rotating shaft to rotate, and the rotating shaft drives the swing arm to rotate, so that the sleeve clamping mechanism clamps the sleeve to the relative position of the sleeve opening of the sleeve core.

Next, the second pushing mechanism 33 pushes the barrel core sleeve mechanism 34 into the barrel sleeve from the barrel core sleeve opening, when the barrel core sleeve mechanism is pushed into the barrel sleeve, the left air cylinder and the right air cylinder block the barrel sleeve to limit the pushing distance of the barrel sleeve, then the wide finger air cylinder drives the upper clamping mechanism and the lower clamping mechanism to open the barrel sleeve respectively, the first air cylinder drives the rotating shaft to rotate, and the rotating shaft drives the swing arm to rotate, so that the barrel sleeve clamping mechanism returns to the relative position of the barrel sleeve opening. The second pushing mechanism comprises a supporting seat 35 arranged inside the rack, a third air cylinder 36 and a sliding rod 37 are arranged on the supporting seat, the third air cylinder drives the sliding block to reciprocate on the sliding rod, a square plate 38 is arranged on the sliding block, and a barrel core sleeve mechanism is arranged on the square plate. The cylinder core sleeve mechanism comprises a fourth motor 39, a first bearing seat 40 and a second bearing seat 41 which are arranged on a square plate, a main shaft 42 is arranged in the first bearing seat and the second bearing seat, the fourth motor is connected with a synchronous belt pulley 44 on the main shaft through a synchronous belt 43, the main shaft is driven to rotate by the fourth motor, and a tensioning mechanism 45 is arranged on the main shaft. The tensioning mechanism in the sleeve core mechanism is used for tensioning the sleeve, and specifically comprises a first tensioning wheel 46 and a third tensioning wheel 47 which are fixed on the main shaft, and a second tensioning wheel 48 and a fourth tensioning wheel 49 which are movably arranged on the main shaft, wherein a fifth cylinder 50 is arranged on the third tensioning wheel, and a connecting rod 51 on the second tensioning wheel passes through the third tensioning wheel and is connected with the fourth tensioning wheel. The first tensioning wheel is provided with a first bevel 52, the second tensioning wheel is provided with a second bevel 99, a circle of first tension spring 53 is arranged on the first bevel and the second bevel in a surrounding mode, the third tensioning wheel is provided with a third bevel 54, the fourth tensioning wheel is provided with a fourth bevel 55, and a circle of second tension spring 56 is arranged on the third bevel and the fourth bevel in a surrounding mode. The fifth cylinder drives the second tension wheel to extrude towards the first tension wheel, a first tension spring between the second tension wheel and the first tension wheel protrudes outwards to be ejected to the inner wall 57 of the cylinder sleeve after being extruded, the second tension wheel pulls the fourth tension wheel to extrude towards the third tension wheel through the connecting rod, and a second tension spring between the third tension wheel and the fourth tension wheel protrudes outwards to be ejected to the inner wall of the cylinder sleeve after being extruded, so that the cylinder sleeves with different lengths can be tensioned. The compressing mechanism 58 of the tensioning mechanism further compresses the packaging tape in the sleeve, the compressing mechanism comprises two sixth air cylinders 60 and 61 fixed on the first tensioning wheel through a transverse plate 59, the sixth air cylinders are connected with a connecting sheet 62, the connecting sheet is connected with a pressing sheet 63, and when the tensioning mechanism is used for tensioning the sleeve, the pressing sheet compresses the packaging tape on the sleeve.

The tension mechanism 98 of this embodiment carries the packing strap 64 to the leading-in mechanism 65 of packing strap, tension mechanism is including being fixed in the tension bracket 66 in the frame, be equipped with first conduction band pole 67 on the tension bracket, meter rice wheel 68 that has the encoder, reduction gears 69, second conduction band pole 70, proximity switch 71, be equipped with weight 100 on the pressure wheel, the weight of weight acts on according to the pinch roller, make according to pinch roller 72 with the packing strap press in meter rice wheel, thereby meter rice wheel accurately calculates the meter that the packing strap passes through the pivoted revolution, the packing strap loops through first conduction band pole, meter rice wheel, the reduction gear, the second conduction band pole. The reduction gear mechanism comprises a guide rod 73, a third spring 74 on the guide rod and a guide block 76 with a reduction gear 75. This embodiment be equipped with hand handle on the pinch roller, when need not to press the wheel pressure packing area, mention through hand handle can. The first guide belt rods are arranged in an up-middle-down mode and are used for standby.

The packaging belt guiding mechanism of this embodiment conveys the packaging belt conveyed by the tension mechanism to the barrel casing, specifically speaking, the packaging belt guiding mechanism comprises a mounting seat 77 fixed in the frame, a sixth servo motor 78, a lead screw 79 and a push rod 80 are arranged on the mounting seat, the sixth servo motor drives the lead screw to rotate, when the lead screw rotates, a driving block 81 reciprocates on the lead screw, the other end of the lead screw is fixed with the push rod, the motion of the driving block can drive the push rod to move, the push rod is hinged to the guide rail mechanism, so that the guide rail mechanism leans on the guide rail rod under the influence of gravity, the push rod can drive the guide rail mechanism 83 to reciprocate on the guide rail rod 99, and the guide rail rod is fixed on the frame. The guide rail mechanism is provided with a guide wheel 84, a belt pressing cylinder 85 and a belt guiding port 86. The packaging belt on the second belt guiding rod sequentially passes through the guide wheel, the guide rail mechanism and the belt guiding opening, the packaging belt conveyed from the belt guiding opening is pressed on the barrel sleeve by the pressing sheet, when the barrel core sleeve mechanism rotates, the sixth servo motor drives the guide rail mechanism to reciprocate, and the packaging belt is wound on the barrel sleeve in a circle.

After the wrapping tape is completely wound on the sleeve, the rotation speed of the core sleeve mechanism is stopped, and the wrapping tape conveyed by the tension mechanism is still at a normal conveying speed, so that the wrapping tape is in a loose state at the stage of the tension mechanism. The tensioning mechanism in the barrel core sleeve mechanism is not used for tensioning the barrel sleeve, namely the fifth cylinder drives the second tensioning wheel to move in the direction opposite to the first tensioning wheel, the first tension spring between the second tensioning wheel and the first tensioning wheel is not extruded any more, the second tensioning wheel drives the fourth tensioning wheel to move in the direction opposite to the third tensioning wheel through the connecting rod, and the second tension spring between the third tensioning wheel and the fourth tensioning wheel is not extruded any more. Then the second pushing mechanism retracts the tube core sleeve mechanism into the tube core sleeve opening, and the diameter of the tube core sleeve opening is smaller than the outer diameter of the wound packaging tape tube sleeve, so that the packaging tape tube sleeve can be blocked outside the tube core sleeve opening, and the pressing sheet can be pulled out of the packaging tape and the tube sleeve under the influence of pushing force. Receive the influence of gravity packing to take the barrel casing to fall into and connect on the flitch 87, connect flitch, striker plate 82 to be connected with conveying mechanism 88, connect the flitch bottom to be equipped with angle adjusting mechanism 89, angle adjusting mechanism is equipped with screw rod 91 including locating riser 90 in the frame on the riser, twists the screw rod, and the screw rod just can connect flitch jack-up to reach the purpose that the flitch angle was connect in the regulation. Simultaneously, the first air cylinder drives the rotating shaft to rotate, the rotating shaft drives the swing arm to rotate, so that the sleeve clamping mechanism clamps the sleeve to the relative position of the sleeve opening of the sleeve core again, the clamped sleeve can further push the packaging belt sleeve to roll down to the conveying mechanism and be blocked by the material blocking plate to prevent the packaging belt from falling to the ground, the packaging belt falls on a new sleeve, the second pushing mechanism pushes the sleeve core mechanism into the sleeve from the sleeve opening of the sleeve core again, at the moment, the left air cylinder and the right air cylinder block the sleeve to limit the pushing distance of the sleeve, the tensioning mechanism tightly tensions the sleeve, and the pressing sheet tightly presses the packaging belt on the sleeve. Then the wide finger cylinder drives the upper clamping mechanism and the lower clamping mechanism respectively to open the sleeve, the first cylinder drives the rotating shaft to rotate, and the rotating shaft drives the swing arm to rotate, so that the sleeve clamping mechanism returns to the relative position of the opening of the sleeve. At the same time, the fusing mechanism 92 cuts the wrapping band to separate the wrapping band sleeve. Thereby carry out next round of packing tape coiling and in the barrel, when section of thick bamboo core cover mechanism starts, can send the signal to pressing the band cylinder, thereby make and press the band cylinder light pressure packing area, the packing area receives the effect back of light pressure, the speed that the packing area passes through packing area guiding-in mechanism also can slow down, thereby when guaranteeing that section of thick bamboo core cover mechanism rotational speed is low, this section packing area between packing area guiding-in mechanism and section of thick bamboo core cover mechanism still has reasonable tension, the packing area normally convolutes on the barrel in this section of time of having ensured at first. In order to further enable the packaging belt in the tension mechanism stage to recover reasonable tension, the rotating speed of the drum core sleeve mechanism is suddenly increased, namely the rotating speed of the drum core sleeve mechanism is faster than that of the packaging belt conveyed by the tension mechanism, and the packaging belt is suddenly changed from a loose state to a tight state, so that the packaging belt is influenced by tension force to pull the guide block to move upwards along the guide rod for buffering. In order to prevent the guide block from moving upwards and being damaged, the third spring on the guide rod can apply elastic force to the guide block for relieving. After the guide block moves upwards, the proximity switch at the bottom feeds back a signal to a tape pressing cylinder in the packaging tape guiding mechanism, so that the tape pressing cylinder is driven to stop applying pressing force to the packaging tape. After the rotating speed of the cylinder core sleeve mechanism is restored to a reasonable rotating speed, the guide block can move back to the bottom of the guide rod under the influence of gravity and is opposite to the proximity switch again. The fusing mechanism comprises a tenth air cylinder 93 arranged on the rack, the tenth air cylinder drives a heated blade 94 to cut off the packaging tape, the blade is an electric heating blade, namely, an electric heating wire is arranged in the blade, and the blade has certain temperature, so that the packaging tape is more conveniently cut off. The conveying mechanism comprises a conveying belt 95 and a fourth motor 96, and the fourth motor drives the conveying belt to convey the packaging belt drum to the packaging box for packaging.

The utility model discloses through the function of each mechanism of control system 97 control during the use, the banding strap that the place ahead equipment (for prior art, not tired description) was carried and is come is guided into first conduction band pole, meter rice wheel, reducing gear, second conduction band pole, leading wheel, guide rail mechanism, conduction band mouth in proper order. The conveying mechanism conveys the sleeve to the sleeve opening, the first pushing mechanism pushes the sleeve to the sleeve clamping mechanism, the sleeve clamping mechanism clamps the sleeve to the relative position of the sleeve core opening, the second pushing mechanism pushes the sleeve core mechanism to the sleeve from the sleeve core opening, at the moment, a packaging belt of the belt guide opening is located on the sleeve, the tensioning mechanism tightly tensions the sleeve, the pressing sheet tightly presses the packaging belt to the sleeve, and the sleeve clamping mechanism loosens the clamping of the sleeve and returns to the relative position of the sleeve opening. The barrel core sleeve mechanism rotates, after the packaging belt is wound on the barrel sleeve, the fusing mechanism cuts off the packaging belt, and the conveying belt conveys the packaging belt barrel sleeve to a packaging box for packaging.

The automatic degree of this embodiment is high, and the packing area is convoluteed more stably on the barrel casing to this embodiment structure is simpler, and manufacturing cost is lower.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A tensioning mechanism is characterized in that: the tensioning mechanism comprises a first tensioning wheel and a third tensioning wheel which are fixed on the main shaft, a second tensioning wheel and a fourth tensioning wheel which are movably arranged on the main shaft, a fifth driving source is arranged on the third tensioning wheel, the fifth driving source drives the second tensioning wheel to extrude towards the first tensioning wheel, a first elastic part between the second tensioning wheel and the first tensioning wheel is protruded outwards to push against the inner wall of the cylinder sleeve after being extruded, the second tensioning wheel pulls the fourth tensioning wheel to extrude towards the direction of the third tensioning wheel through a connecting rod, and a second elastic part between the third tensioning wheel and the fourth tensioning wheel is protruded outwards to push against the inner wall of the cylinder sleeve after being extruded.

2. The tensioning mechanism according to claim 1, wherein: the first tensioning wheel is provided with a first oblique angle, the second tensioning wheel is provided with a second oblique angle, a circle of first elastic piece is arranged on the first oblique angle and the second oblique angle in a surrounding mode, the third tensioning wheel is provided with a third oblique angle, the fourth tensioning wheel is provided with a fourth oblique angle, and a circle of second elastic piece is arranged on the third oblique angle and the fourth oblique angle in a surrounding mode.

3. The tensioning mechanism according to claim 1 or 2, wherein: the first elastic piece is a first tension spring.

4. The tensioning mechanism according to claim 1 or 2, wherein: the second elastic piece is a second tension spring.

5. The tensioning mechanism according to claim 1, wherein: the fifth driving source is a fifth cylinder.

6. A packaging tape winder comprises a rack, wherein a conveying mechanism for conveying a sleeve to a sleeve opening is arranged on the rack; the first pushing mechanism pushes the sleeve to the sleeve clamping mechanism, the sleeve clamping mechanism clamps the sleeve to a sleeve core looping position, when the second pushing mechanism pushes the sleeve core sleeving mechanism into the sleeve, a tensioning mechanism in the sleeve core sleeving mechanism tightly tensions the sleeve, the tensioning mechanism conveys the packaging tape to a packaging tape guiding mechanism, the packaging tape guiding mechanism conveys the packaging tape to the sleeve, a pressing mechanism in the tensioning mechanism tightly presses the packaging tape in the sleeve, when the sleeve core sleeving mechanism rotates, the packaging tape is wound on the sleeve, and the packaging tape is cut off by a fusing mechanism after winding is finished;

the method is characterized in that: the tensioning mechanism comprises a first tensioning wheel and a third tensioning wheel which are fixed on the main shaft, a second tensioning wheel and a fourth tensioning wheel which are movably arranged on the main shaft, a fifth driving source is arranged on the third tensioning wheel, the fifth driving source drives the second tensioning wheel to extrude towards the first tensioning wheel, a first elastic part between the second tensioning wheel and the first tensioning wheel is protruded outwards to push against the inner wall of the cylinder sleeve after being extruded, the second tensioning wheel pulls the fourth tensioning wheel to extrude towards the direction of the third tensioning wheel through a connecting rod, and a second elastic part between the third tensioning wheel and the fourth tensioning wheel is protruded outwards to push against the inner wall of the cylinder sleeve after being extruded.

7. A packaging tape winder as claimed in claim 6, wherein: the first tensioning wheel is provided with a first oblique angle, the second tensioning wheel is provided with a second oblique angle, a circle of first elastic piece is arranged on the first oblique angle and the second oblique angle in a surrounding mode, the third tensioning wheel is provided with a third oblique angle, the fourth tensioning wheel is provided with a fourth oblique angle, and a circle of second elastic piece is arranged on the third oblique angle and the fourth oblique angle in a surrounding mode.

8. A packaging tape winder according to claim 6 or 7, wherein: the first elastic piece is a first tension spring.

9. A packaging tape winder according to claim 6 or 7, wherein: the second elastic piece is a second tension spring.

10. A packaging tape winder as claimed in claim 6, wherein: the fifth driving source is a fifth cylinder.

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