CN111229864A

CN111229864A - Uncoiler

Info

Publication number: CN111229864A
Application number: CN201911418220.5A
Authority: CN
Inventors: 谢建芳
Original assignee: Zhejiang Concord Sheet Science And Technology Co ltd
Current assignee: Zhejiang Concord Sheet Science And Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-06-05
Anticipated expiration: 2039-12-31
Also published as: CN111229864B

Abstract

The invention relates to an uncoiler, which comprises a rack, a tensioning shaft arranged on the rack and a driving device for driving the tensioning shaft to rotate, wherein the driving device is fixedly arranged on the rack, a sliding pipe is arranged on the rack, the sliding pipe can be rotatably arranged around the axis of the sliding pipe, two sliding rods are arranged on the peripheral wall of the sliding pipe along the axial direction of the sliding pipe, a fixing device is arranged between the sliding rods and the sliding pipe, friction boxes are respectively arranged at one ends of the two sliding rods, which are far away from the sliding pipe, friction notches are respectively arranged at one sides, which are opposite to the two friction boxes, a friction wheel is respectively arranged at two sides of the friction notch in each friction box, the peripheral walls of the two friction wheels in the same friction box are mutually abutted, an elastic device is arranged between the friction wheels and the friction boxes, and an installation device is arranged on the rack, the invention has the effect that the uncoiler can uncoil the thin steel coil and simultaneously process the end surfaces of the two sides of the thin steel coil.

Description

Uncoiler

Technical Field

The invention relates to a technical basin of thin steel production equipment, in particular to an uncoiler.

Background

The uncoiler is special equipment for leveling metal plates, and is used for forming uncoiling, leveling and shearing production lines and other plate product production lines by leveling line steel plates and uneven plates according to related configurations. The method is suitable for industries such as machinery, vehicles, metal product household appliances, steel structures, decoration and the like. The thin steel needs to be trimmed after being unwound from an uncoiler in the acidification process, and then is acidified to ensure the production quality of the thin steel.

Chinese patent application publication No. CN104528425A discloses an uncoiler, which comprises a frame body, an uncoiling device and a feeding device, wherein the frame body comprises an underframe and a vertical frame, the vertical frame is positioned on the underframe, and the vertical frame is perpendicular to the underframe;

the uncoiling device comprises a main shaft arranged on the vertical frame, the main shaft provides power by means of a power device, a plurality of arc-shaped guard plates are uniformly distributed on the periphery of the main shaft in the circumferential direction, the guard plates are arranged in parallel with the main shaft, the guard plates are connected with the main shaft through a connecting rod structure, a back plate is arranged on one side, close to the vertical frame, of the main shaft, a central hole for the main shaft to penetrate through is formed in the center of the back plate, the back plate is fixed on the vertical frame, and a plurality of positioning beads are arranged on the outer side;

the feeding device comprises a material pressing mechanism, a first feeding mechanism and a second feeding mechanism, the material pressing mechanism and the first feeding mechanism are respectively located on two sides of the uncoiling device, the second feeding mechanism is located below the material pressing mechanism, the material pressing mechanism comprises a material pressing arm, one end of the material pressing arm is connected with the driving device through a transmission rod, a material pressing roller is arranged at the other end of the material pressing arm, the first feeding mechanism comprises a feeding arm, one end of the feeding arm is connected with the driving device through the transmission rod, a first feeding roller is arranged at the other end of the feeding arm, the second feeding mechanism comprises a feeding rod, one end of the feeding rod is movably connected with the vertical frame, and a second feeding roller is arranged on the feeding rod.

When the technical scheme works, the thin steel coil is sleeved on the main shaft, then the steel coil plate is tensioned and fixed through the plurality of back plates, the power device drives the main shaft to rotate and is uncoiled from the main shaft through the steel coil plate, the steel coil plate is uncoiled, the driving device drives the transmission rod to rotate and further drives the feeding arm to rotate, the first feeding roller is abutted to the peripheral wall of the thin steel coil, the driving device drives the transmission rod to move and further drives the pressing arm to rotate, the pressing roller is abutted to the peripheral wall of the thin steel coil, and the feeding fixing roller moves along the vertical frame of the feeding fixing roller so that the second feeding roller is abutted to the peripheral wall of the thin steel coil.

The above prior art solutions have the following drawbacks: the feeding of the device is stabilized through the first feeding mechanism and the second feeding mechanism, but the thin rolled plate is not processed at all.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an uncoiler capable of processing the edge of thin steel.

The above object of the present invention is achieved by the following technical solutions: the utility model provides an uncoiler, includes frame, the tensioning axle of setting in the frame and drives the rotatory drive arrangement of tensioning axle, drive arrangement is fixed to be set up in the frame, be provided with the slide tube in the frame, the slide tube is around its self axis rotatable setting, be provided with two slide bars along its axial on the perisporium of slide tube, the slide bar with be provided with fixing device, two between the slide tube the slide bar is kept away from the one end of slide tube all is provided with friction box, two friction breach, every have all been seted up to one side that friction box set up relatively in the friction box in the both sides of friction breach respectively are provided with a friction pulley, the mutual butt of perisporium of two friction pulleys in the same friction box, the friction pulley with be provided with resilient means between the friction box, be provided with installation device in the frame.

By adopting the technical scheme, after the thin steel coil is fixed to the tensioning shaft on the rack through the mounting device, the two sliding rods slide along the axial direction of the sliding pipe corresponding to the width of the thin steel coil, the friction boxes on the two sliding rods are arranged corresponding to the two ends of the thin steel coil, then the sliding rods are fixed through the fixing device, one end of the thin steel passes through the friction notch and the two sides of the thin steel coil are positioned between the two friction wheels, the thin steel is abutted against the two friction forces to enable the two friction wheels to be contracted so that the two friction wheels are abutted against the thin steel, the thin steel coil is untied from the tensioning shaft along with the driving device driving the tensioning shaft, the thin steel gradually passes between the two friction wheels, the edges of the two sides of the thin steel are trimmed by the two friction wheels, burrs on the edge of the thin steel coil are removed, the sliding pipe can rotate around the axis of the thin steel coil along with the gradual reduction of the diameter of the thin steel coil, so that the position of the, make things convenient for the thin steel to pass the friction breach, can maintain by the both sides of friction wheel pair thin steel like this, and two slide bars can carry out position control along the axial of slide tube and make the device can be applicable to the thin steel of width not stopping, and resilient means can make the interval between the perisporium of two friction wheels in the same friction box adjustable, makes the device can be applicable to the thin steel of different thickness.

The present invention in a preferred example may be further configured to: the sliding pipe is provided with a sliding hole communicated with the inner cavity of the pipe along the axial direction of the sliding pipe, and one end of the sliding rod, which is far away from the friction box, penetrates through the sliding hole to correspond to the sliding block arranged in the pipe of the sliding pipe.

Through adopting above-mentioned technical scheme, when the slide bar carries out position control, the sliding block slided along the axial of sliding tube in the sliding tube, and the slide bar slides along the length direction in slide hole simultaneously, has realized the regulation of slide bar along sliding tube axial position like this, makes the friction box that sets up on the slide bar can correspond the thin steel of different width, has improved the device's suitability.

The present invention in a preferred example may be further configured to: the fixing device comprises a fixing nut which is connected with one end of the sliding rod far away from the friction box in a threaded mode, the sliding pipe is cut on the peripheral wall of the sliding pipe corresponding to the fixing nut to form a tight supporting plane, and the fixing nut tightly supports the tight supporting plane.

Through adopting above-mentioned technical scheme, adjust to suitable position at the slide bar after, revolve to the slip tube with fixation nut, make fixation nut support tightly and support the plane and can accomplish the fixed to the slide bar position, support tight plane and increased the area of contact between fixation nut and the slip tube, so not only realized the fixed to the slide bar position, make fixing device more firm fixed to the slide bar through the butt plane moreover.

The present invention in a preferred example may be further configured to: the elastic device comprises a friction box, a sliding groove, a sliding sheet and a spring, wherein the friction box corresponds to waist-shaped holes formed in the box wall of the friction wheel, the waist-shaped holes are formed in the box wall of the friction wheel, the sliding groove is formed in the box wall of the friction wheel, the sliding sheet is arranged in the sliding groove in a sliding mode, the sliding sheet is arranged far away from one end of the friction wheel and the sliding groove, the spring is arranged between the friction wheels, and the sliding groove is communicated with the waist-shaped holes.

Through adopting above-mentioned technical scheme, the spring shrink when thin steel extrudees two friction pulleys, and the slide slides towards the diapire of sliding tray in the sliding tray, and the pivot of friction pulley slides along the length direction in waist shape downthehole edge waist shape hole simultaneously, has realized like this that the friction pulley is along waist shape hole length direction's position control.

The present invention in a preferred example may be further configured to: one end of any friction wheel in the same friction box, which is far away from the other friction box, is provided with an annular groove, and the peripheral wall of the other friction wheel in the same friction box is provided with a friction ring corresponding to the annular groove.

Through adopting above-mentioned technical scheme, the burr of thin steel both sides can further be handled to the friction ring, and when two friction pulleys in same friction box received the extrusion of thin steel and moved away from each other, the diapire that the annular groove was kept away from equally to the friction ring removed for no matter how thick thin steel's both sides all can be supported to the friction ring and carry out the repairment, improved the device's suitability like this.

The present invention in a preferred example may be further configured to: the friction box with the equal opening setting in both sides that the friction breach is parallel, the friction box in the opening part can be dismantled fixedly and be provided with the lid, the sliding tray with waist shape hole all communicates the opening setting, the spring butt the lid.

Through adopting above-mentioned technical scheme, fixed setting can be dismantled to the lid, can be when the friction pulley needs to be changed, and the lid of pulling down can tear the friction box out with the sliding block from the sliding tray, has also torn the friction box out with the friction pulley simultaneously, has realized the change of friction pulley like this.

The present invention in a preferred example may be further configured to: the installation device include in set up under the tensioning axle a plurality of slide rails in the frame are in a plurality of with the slip setting sliding table on the slide rail, the slide rail is followed the axial setting of tensioning axle, the length of slide rail is greater than the length of tensioning axle, the fixed elevating gear that is provided with on the sliding table, the sliding table with be provided with the pulling device between the frame.

Through adopting above-mentioned technical scheme, the coil of strip is when installing to the tensioning axle, make the sliding stand be in the frame and keep away from drive arrangement one end, then place the coil of strip at elevating gear, elevating gear risees the coil of strip to the positive tensioning axle of pore pair in the middle of the coil of strip, then pulling device pulling sliding stand removes the coil of strip cover to the tensioning axle with one section drive arrangement on the guide rail, then elevating gear shrink and tensioning axle open and fix the coil of strip, make the coil of strip install the tensioning axle fast like this on, the convenience of the device has been improved.

The present invention in a preferred example may be further configured to: elevating gear is including setting up the sliding stand is close a plurality of lift cylinders and the fixed setting of tensioning axle one side are in lift platform on the lift cylinder, correspond on the sliding stand the cylinder body of lift cylinder is provided with a plurality of recesses, the lift platform is close one side of tensioning axle is provided with V type breach.

Through adopting above-mentioned technical scheme, the lift cylinder stretches out the piston rod and raises the elevating platform, makes the thin coil of strip of placing on the elevating platform lift, and the stability after the thin coil of strip is placed on the elevating platform has been guaranteed to the type of falling V breach, and the recess makes the cylinder body mountable of lift cylinder to the recess in, has reduced the lift cylinder and has withdrawed piston rod back elevating platform and the shared volume of sliding stand, has realized the rising of thin coil of strip like this, and has reduced the shared space of elevating gear and sliding stand.

The present invention in a preferred example may be further configured to: pulling device is including setting up driving motor, coaxial fixed connection in the frame are in first gear, setting on the driving motor are in the frame is kept away from the second gear of tensioning axle one end is in with the meshing the chain of first gear and second gear, the both ends of chain respectively with the sliding stand is close the both sides fixed connection of driving motor and second gear.

Through adopting above-mentioned technical scheme, driving motor is rotatory to drive the chain through the gear and remove, and the both ends of chain pulling sliding stand make the sliding stand slide on the guide rail, have realized the slip of sliding stand along the guide rail like this.

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

1. the friction wheels can be used for trimming two sides of the thin steel, the two sliding rods can be used for adjusting the positions along the axial direction of the sliding pipe, so that the device can be suitable for the thin steel with continuous width, and the elastic device can be used for adjusting the distance between the peripheral walls of the two friction wheels in the same friction box, so that the device can be suitable for the thin steel with different thicknesses;

2. the abutting plane increases the contact area between the fixing nut and the sliding pipe, so that the position of the sliding rod is fixed, and the fixing device is more firmly fixed to the sliding rod through the abutting plane;

3. the burr of thin steel both sides can further be handled to the friction ring, and when two friction pulleys in same friction box received the extrusion of thin steel and move from each other, the diapire that the annular groove was kept away from equally to the friction ring removed for no matter how thick thin steel's both sides can all be supported to the friction ring on to be maintained, improved the device's suitability like this.

Drawings

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

FIG. 2 is a cross-sectional view of section A-A of FIG. 1;

fig. 3 is an enlarged schematic view of a portion a of fig. 2.

In the figure, 1, a frame; 11. tensioning the shaft; 12. a drive device; 13. a sliding tube; 131. a slide bar; 1311. a slider; 132. a slide hole; 2. a fixing device; 21. fixing a nut; 22. abutting against the plane; 3. a friction box; 31. a friction notch; 32. a friction wheel; 321. an annular groove; 322. a friction ring; 33. an opening; 34. a box cover; 4. an elastic device; 41. a waist-shaped hole; 42. a sliding groove; 43. a slide sheet; 44. a spring; 51. a slide rail; 52. a sliding table; 53. a lifting device; 531. a lifting cylinder; 532. a lifting platform; 533. a groove; 534. a V-shaped notch; 54. a pulling device; 541. a drive motor; 542. a first gear; 543. a second gear; 544. and a chain.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the uncoiler disclosed by the invention comprises a frame 1, a tensioning shaft 11 arranged on the frame 1, and a driving device 12 fixedly arranged on the frame 1 and driving the tensioning shaft 11 to rotate.

Referring to fig. 2 and 3, a sliding tube 13 is arranged on a frame 1, the sliding tube 13 is rotatably arranged around the axis of the sliding tube 13, two sliding rods 131 are arranged on the circumferential wall of the sliding tube 13 along the axial direction of the sliding tube, a fixing device 2 is arranged between the sliding rods 131 and the sliding tube 13, friction boxes 3 are arranged at the ends, far away from the sliding tube 13, of the two sliding rods 131, friction gaps 31 are respectively formed in the opposite sides of the two friction boxes 3, two friction wheels 32 are respectively arranged on the two sides of each friction box 3 in the friction gaps 31, the circumferential walls of the two friction wheels 32 in the same friction box 3 are mutually abutted, an elastic device 4 is arranged between each friction wheel 32 and the friction box 3, and a mounting device is arranged on the frame 1. In this embodiment, slide bar 131 sets up to the arc, and the arc section of slide bar 131 deviates from the tension roll protrusion setting, and friction and about friction breach 31 symmetry.

Referring to fig. 2, the sliding tube 13 is provided with a sliding hole 132 along the axial direction thereof for communicating the inner cavity of the tube, and one end of the sliding rod 131 far away from the friction box 3 passes through the sliding hole 132 and is provided with a sliding block 1311 corresponding to the tube of the sliding tube 13. The fixing device 2 includes a fixing nut 21 screwed to one end of the sliding rod 131 far from the friction box 3, the sliding tube 13 is cut on its peripheral wall to form a pressing plane 22 corresponding to the fixing nut 21, and the fixing nut 21 presses against the pressing plane 22. In the present embodiment, the axial length of the slide hole 132 along the slide tube 13 is greater than the length of the tension shaft 11.

Referring to fig. 2 and 3, the elastic device 4 includes a waist-shaped hole 41 formed in the friction box 3 on the box wall corresponding to the two ends of the friction wheel 32, a sliding groove 42 formed in the box wall, a sliding sheet 43 slidably disposed in the sliding groove 42, and a spring 44 disposed between one end of the sliding sheet 43 far away from the friction wheel 32 and the sliding groove 42 far away from the friction wheel 32, wherein the sliding groove 42 is communicated with the waist-shaped hole 41. One end of any friction wheel 32 in the same friction box 3, which is far away from the other friction box 3, is provided with an annular groove 321, and the peripheral wall of the other friction wheel 32 in the same friction box 3 is provided with a friction ring 322 corresponding to the annular groove 321. In the present embodiment, the width of the sliding groove 42 is larger than the width of the waist-shaped hole 41, and the peripheral wall of the friction ring 322 abuts against the bottom wall of the annular groove 321 when the peripheral walls of the two friction wheels 32 in the same friction case 3 abut against each other.

Referring to fig. 3, the openings 33 on both sides of the friction box 3 parallel to the friction gap 31 are provided, the box cover 34 is detachably and fixedly provided on the friction box 3 at the opening 33, the sliding groove 42 and the waist-shaped hole 41 are both communicated with the opening 33, and the spring 44 abuts against the box cover 34.

Referring to fig. 2, the mounting device includes a plurality of slide rails 51 disposed on the frame 1 directly below the tensioning shaft 11 and a sliding table 52 slidably disposed on the slide rails 51, the slide rails 51 are disposed along the axial direction of the tensioning shaft 11, the length of the slide rails 51 is greater than that of the tensioning shaft 11, a lifting device 53 is fixedly disposed on the sliding table 52, and a pulling device 54 is disposed between the sliding table 52 and the frame 1. In this embodiment, two slide rails 51 are provided, and the length of the slide rail 51 is greater than twice the length of the tension shaft 11.

Referring to fig. 2, the lifting device 53 includes a plurality of lifting cylinders 531 disposed on one side of the sliding table 52 close to the tension shaft 11 and a lifting table 532 fixedly disposed on the lifting cylinders 531, the sliding table 52 is provided with a plurality of grooves 533 corresponding to the cylinders of the lifting cylinders 531, and one side of the lifting table 532 close to the tension shaft 11 is provided with a V-shaped notch 534. In this embodiment, four lifting cylinders 531 are provided corresponding to the four corners of the sliding table 52, and four corresponding grooves 533 are provided.

Referring to fig. 2, the pulling device 54 includes a driving motor 541 disposed in the frame 1, a first gear 542 coaxially and fixedly connected to the driving motor 541, a second gear 543 disposed at an end of the frame 1 far from the tension shaft 11, and a chain 544 engaged with the first gear 542 and the second gear 543, wherein two ends of the chain 544 are fixedly connected to two sides of the sliding table 52 close to the driving motor 541 and the second gear 543, respectively. In this embodiment, the first gear 542 and the second gear 543 have the same structure.

The implementation principle of the embodiment is as follows: when the thin steel coil is installed on the tensioning shaft 11 through the installation device, the sliding table 52 is located at one end, away from the driving device 12, of the rack 1, then the thin steel coil is placed on the lifting table 532, the lifting cylinder 531 stretches out of the piston rod to enable the lifting table 532 to ascend the thin steel coil to the tensioning shaft 11 in the middle of the thin steel coil, the driving motor 541 rotates to drive the chain 544 to move through the gear, the chain 544 pulls the sliding table 52 to enable the sliding table 52 to slide on the guide rail towards the driving device 12 to sleeve the thin steel coil to the tensioning shaft 11, and then the lifting cylinder 531 retracts the piston and the tensioning shaft 11 opens to fix the thin steel coil. When the device works, two sliding rods 131 slide along the axial direction of a sliding tube 13 corresponding to the width of a thin steel coil, friction boxes 3 on the two sliding rods 131 are arranged corresponding to the two ends of the thin steel coil, then a fixing nut 21 is screwed to enable the fixing nut 21 to be tightly abutted against a plane 22 to fix the position of the sliding rod 131, then one end of the thin steel passes through a friction gap 31 and enable the two sides of the thin steel coil to be positioned between two friction wheels 32, the thin steel is abutted against two friction forces to enable a spring 44 to contract, meanwhile, a sliding block 1311 slides towards a box cover 34 in a sliding groove 42, the sliding rod 131 slides towards the box cover 34 along the length direction of a waist-shaped hole 41, the two friction wheels 32 are tightly abutted against the thin steel under the action of the spring 44, the thin steel coil is untied from a tensioning shaft 11 along with the driving device 12 driving the tensioning shaft 11, the thin steel gradually passes between the two friction wheels 32, the two friction wheels 32 and the friction rings 322 trim the edges of the two sides of, the burrs on the edge of the thin steel are removed, and the sliding pipe 13 can rotate around the axis of the sliding pipe along with the gradual reduction of the diameter of the thin steel coil, so that the friction box 3 moves to a proper position along with the reduction of the diameter of the thin steel coil, and the thin steel can conveniently pass through the friction gap 31. The box cover 34 is detachably fixed, so that when the friction wheel 32 needs to be replaced, the sliding block 1311 can be detached from the sliding groove 42 to detach the friction box 3 by detaching the box cover 34, and meanwhile, the friction wheel 32 is detached from the friction box 3, so that the friction wheel 32 is replaced.

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

Claims

1. The utility model provides an uncoiler, includes frame (1), sets up tensioning axle (11) and the drive in frame (1) tensioning axle (11) rotatory drive arrangement (12), drive arrangement (12) are fixed to be set up in frame (1), its characterized in that: a sliding pipe (13) is arranged on the frame (1), the sliding pipe (13) can be rotatably arranged around the axis of the sliding pipe, two sliding rods (131) are arranged on the peripheral wall of the sliding pipe (13) along the axial direction thereof, a fixing device (2) is arranged between the sliding rods (131) and the sliding pipe (13), friction boxes (3) are respectively arranged at one ends of the two sliding rods (131) far away from the sliding pipe (13), friction gaps (31) are respectively arranged at one sides of the two friction boxes (3) which are opposite to each other, a friction wheel (32) is respectively arranged at two sides of the friction gap (31) in each friction box (3), the peripheral walls of the two friction wheels (32) in the same friction box (3) are mutually abutted, an elastic device (4) is arranged between the friction wheel (32) and the friction box (3), and a mounting device is arranged on the rack (1).

2. An unwinder as claimed in claim 1, wherein: the sliding pipe (13) is provided with a sliding hole (132) communicated with the inner cavity of the pipe along the axial direction of the sliding pipe, and one end of the sliding rod (131), which is far away from the friction box (3), penetrates through the sliding hole (132) and corresponds to the sliding pipe (13) and is internally provided with a sliding block (1311).

3. An unwinder as claimed in claim 1, wherein: the fixing device (2) comprises a fixing nut (21) which is in threaded connection with one end, far away from the friction box (3), of the sliding rod (131), the sliding pipe (13) is provided with a pressing plane (22) in a cutting mode on the peripheral wall of the fixing nut (21), and the fixing nut (21) presses against the pressing plane (22).

4. An unwinder as claimed in claim 1, wherein: resilient means (4) include friction box (3) correspond waist shape hole (41) that friction wheel (32) both ends set up on its box wall, set up in sliding tray (42) in the box wall, slide set up in slide (43) in sliding tray (42), set up in slide (43) are kept away from friction wheel (32) one end and sliding tray (42) are kept away from spring (44) between friction wheel (32), sliding tray (42) intercommunication waist shape hole (41) set up.

5. An unwinder as claimed in claim 1, wherein: one end, far away from the other friction box (3), of any one friction wheel (32) in the same friction box (3) is provided with an annular groove (321), and the peripheral wall of the other friction wheel (32) in the same friction box (3) is provided with a friction ring (322) corresponding to the annular groove (321).

6. An unwinder as claimed in claim 1, wherein: friction box (3) with the equal opening in both sides (33) setting of friction breach (31) parallel, friction box (3) in opening (33) department can be dismantled fixedly and be provided with lid (34), sliding tray (42) with waist shape hole (132) all communicate opening (33) set up, spring (44) butt lid (34).

7. An unwinder as claimed in claim 1, wherein: the installation device include in set up under tensioning axle (11) a plurality of slide rails (51) and the slip setting in frame (1) are in a plurality of sliding table (52) on slide rail (51), slide rail (51) are followed the axial setting of tensioning axle (11), the length of slide rail (51) is greater than the length of tensioning axle (11), fixed elevating gear (53) that is provided with on sliding table (52), sliding table (52) with be provided with between frame (1) pulling device (54).

8. An unwinder as claimed in claim 7, wherein: elevating gear (53) are including setting up slide table (52) are close a plurality of lift cylinders (531) and the fixed setting of tensioning axle (11) one side are in lift platform (532) on lift cylinder (531), correspond on slide table (52) the cylinder body of lift cylinder (531) is provided with a plurality of recesses (533), lift platform (532) are close one side of tensioning axle (11) is provided with V type breach (534).

9. An unwinder as claimed in claim 8, wherein: pulling device (54) including setting up driving motor (541) in frame (1), coaxial fixed connection be in first gear (542) on driving motor (541), setting are in frame (1) is kept away from second gear (543) of tensioning axle (11) one end and is engaged in chain (544) of first gear (542) and second gear (543), the both ends of chain (544) respectively with sliding table (52) is close the both sides fixed connection of driving motor (541) and second gear (543).