CN212503244U

CN212503244U - Non-woven fabrics is with cutting device

Info

Publication number: CN212503244U
Application number: CN202020543302.4U
Authority: CN
Inventors: 张倩
Original assignee: Tianjin Dengfeng Health Supplies Material Co ltd
Current assignee: Tianjin Dengfeng Health Supplies Material Co ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2021-02-09
Anticipated expiration: 2030-04-14

Abstract

The utility model discloses a non-woven fabric slitting device, which relates to the technical field of non-woven fabric slitting equipment, and comprises a frame, wherein a feeding part, a slitting part and a coiling part are sequentially arranged on the frame along the length direction of the frame, the feeding part comprises a feeding roller arranged on the frame, and a charging barrel is detachably arranged on the feeding roller; the cutting part comprises an upper cutter frame arranged in the middle of the rack and a lower cutter shaft rotationally arranged on the rack, a driving part is arranged on the rack, a plurality of bottom cutters distributed at intervals along the axis direction of the lower cutter shaft are sleeved on the lower cutter shaft, translation cutter sets are arranged at two ends of the upper cutter frame, each translation cutter set comprises a base and a sliding part, the base is arranged on the upper cutter frame, and a first cutting knife and a second cutting knife are arranged on the base; the winding part comprises a lower winding roller and an upper winding roller, wherein the lower winding roller is rotatably arranged on the rack, the upper winding roller is arranged on the upper side of the lower winding roller at intervals, and a transmission assembly is further arranged on the rack. The utility model discloses a non-woven fabrics is with cutting device convenient to adjust and cut width.

Description

Non-woven fabrics is with cutting device

Technical Field

The utility model relates to an equipment technical field is cut to the non-woven fabrics, especially relates to a non-woven fabrics is with cutting device.

Background

When the non-woven fabric slitter is used for the slitting process of non-woven fabrics, the non-woven fabric coiled material of broad width can be cut edge, the wind limit work as required generally to divide the non-woven fabric of broad width into the non-woven fabrics that various production needs are suitable for in range, roll up the non-woven fabrics into the coiled material after slitting.

The utility model discloses a device is cut to non-woven fabrics is published to current patent grant publication number is CN206090142U, which comprises a frame, the anterior lower extreme of frame sets up the knife rest guide rail, and the cutter is divided to fixed a plurality of on the knife rest guide rail, sets up down the synchronizing wheel in the frame lower part, and lower synchronizing wheel is located and divides the cutter downside, and frame upper portion sets up the synchronizing wheel, sets up the compression roller in the frame middle part, and the compression roller is located the synchronizing wheel lower part, sets up the fabric guide roller mount in the lateral wall upper end at frame rear portion, sets up the fabric guide roller on the fabric guide roller mount.

By adopting the technical scheme, the non-woven fabric is fed from the fabric guide roller, discharged between the upper synchronizing wheel and the press roller, and is divided into strips by the dividing cutter, and then the processed non-woven fabric is sent out from the bottom of the lower synchronizing wheel. However, because the position of the slitting knife can not be adjusted, when the non-woven fabrics with different widths are slit, the slitting knife needs to be replaced again, and the width of the slitting knife can not be directly adjusted, so that the problems of low working efficiency and high production cost and labor cost are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a device is cut to non-woven fabrics utilizes portable first branch cutter and second branch cutter to cut the non-woven fabrics, is convenient for adjust the width of cutting of non-woven fabrics, practices thrift the human cost, improves work efficiency.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a non-woven fabric slitting device comprises a rack, wherein a feeding part, a slitting part and a winding part are sequentially arranged on the rack along the length direction of the rack, the feeding part comprises a feeding roller arranged on the rack, and a charging barrel is detachably arranged on the feeding roller; the cutting part comprises an upper cutter frame arranged in the middle of the rack and a lower cutter shaft which is rotatably arranged on the rack and is positioned below the upper cutter frame, a driving piece for driving the lower cutter shaft to rotate is arranged on the rack, a plurality of bottom cutters which are distributed at intervals along the axis direction of the lower cutter shaft are sleeved on the lower cutter shaft, translation cutter sets are arranged at two ends of the upper cutter frame, each translation cutter set comprises a base arranged on the upper cutter frame and a sliding piece for driving the base to slide, and a first cutting knife and a second cutting knife are arranged on the base; the rolling portion sets up in the last wind-up roll of wind-up roll upside down including rotating lower wind-up roll and interval that set up in the frame, still be equipped with in the frame and be used for driving wind-up roll and last wind-up roll synchronous rotating's drive assembly down.

Through adopting above-mentioned technical scheme, the material loading roller is used for supporting the feed cylinder, thereby the width that the non-woven fabrics was cut is adjusted in the removal of the first branch cutter of slip drive and second branch cutter, thereby wind-up roll and the synchronous rotation of wind-up roll down realize the rolling work of the non-woven fabrics after cutting in the drive assembly drive. Through this kind of mode, the position of convenient quick regulation first branch cutter and second branch cutter to obtain the non-woven fabrics demand of different width, reduce equipment cost's input, improve work efficiency.

The utility model discloses further set up to: the sliding part is a sliding cylinder, a piston rod of the sliding cylinder is fixedly connected with the base, the first slitting knife is fixedly arranged on one side, away from the sliding cylinder, of the base, the second slitting knife is arranged on the base in a sliding mode along the axis direction of the upper knife rest, and a driving assembly used for driving the second slitting knife to move is arranged on the base.

Through adopting above-mentioned technical scheme, the reciprocating motion of the flexible drive base of the cylinder piston rod that slides, the reciprocating motion of drive assembly drive second slitting knife to adjust the position of second slitting knife and first slitting knife, make things convenient for the adjusting position, make the device can cut the non-woven fabrics and be arbitrary width, application scope is wider.

The utility model discloses further set up to: the driving assembly comprises a fixed plate fixedly arranged on the base and a lead screw horizontally arranged on the base in a rotating mode, the lead screw penetrates through the top plate along the sliding direction of the second slitting knife and is connected with the second slitting knife in a rotating mode, and a hand wheel is fixed to one end, far away from the second slitting knife, of the lead screw.

By adopting the technical scheme, the rotation of the hand wheel drives the synchronous rotation of the screw rod, and the rotation of the screw rod drives the reciprocating movement of the second slitting knife, so that the positions of the second slitting knife and the first slitting knife are adjusted.

The utility model discloses further set up to: the detachable is provided with a plurality of handle of a knife that are the one-to-one setting with first branch cutter and second branch cutter respectively on the base, first branch cutter and second divide the cutter to set up respectively on adjacent handle of a knife.

Through adopting above-mentioned technical scheme, when the wearing and tearing of first branch cutter or second branch cutter are great, the accessible is dismantled the handle of a knife in order to change, the maintenance of the equipment of being convenient for.

The utility model discloses further set up to: the both ends of top rest all articulate there is the upset cylinder, two the upset cylinder is kept away from one side of top rest and all articulates and set up in the frame.

Through adopting above-mentioned technical scheme, the up-and-down motion of the flexible drive upper knife rest of upset cylinder piston rod to make and form great interval between upper knife rest and the lower cutter arbor, make things convenient for the material loading of non-woven fabrics.

The utility model discloses further set up to: the feeding part further comprises two placing frames which are arranged on two sides of the width direction of the rack respectively, a feeding groove used for placing a feeding roller is formed in one side, close to the rack, of the placing frame, the two ends of the feeding roller are coaxially connected with a feeding bearing, the feeding roller and an inner shaft of the feeding bearing are coaxially fixed, a limiting bolt is connected to the placing frame in a threaded mode, and the limiting bolt abuts against the outer wall of the feeding bearing.

Through adopting above-mentioned technical scheme, when the restriction of material loading roller was in the material loading recess, the operator twisted spacing bolt towards the outside of material loading bearing and moved, and until spacing bolt and material loading bearing's the outside inconsistent, spacing bolt set up to make the position of material loading bearing restricted, increased the stability of being connected between material loading roller and the material loading recess.

The utility model discloses further set up to: the two sides of the width direction of the rack are hinged with rotating cylinders, piston rods of the rotating cylinders are hinged with the two placing frames respectively, and limited convex parts are formed on one sides, far away from the feeding grooves, of the placing frames.

Through adopting above-mentioned technical scheme, the flexible reciprocal rotation that can drive the material loading roller on the rack of rotating the cylinder piston rod drives the material loading roller through rotating the cylinder and moves to the material loading recess. Meanwhile, the arrangement of the limiting convex part can effectively prevent the possibility that the feeding roller slides to the ground from the placing frame in the moving process, and the use safety of the equipment is improved.

The utility model discloses further set up to: and a limiting assembly is arranged between the feeding roller and the upper tool rest and comprises an upper roller horizontally rotatably erected on the rack and a lower roller arranged on the lower side of the upper roller at intervals in parallel.

Through adopting above-mentioned technical scheme, the non-woven fabrics from last cylinder and the clearance transmission between the cylinder down, guarantee that the smooth entering of non-woven fabrics cuts the portion, can not take place to beat from top to bottom, guarantee the stationarity of cutting.

The utility model discloses further set up to: go up the upside of wind-up roll and be equipped with the plain-barreled roll and decide the roller, it is provided with a plurality of tension brackets that are interval distribution to rotate on the plain-barreled roll, it is provided with the tension roller to rotate on the tension bracket, it has tension cylinder to articulate on the tension bracket, one side that tension bracket was kept away from to tension cylinder is connected with deciding the roller is articulated.

Through adopting above-mentioned technical scheme, the upset from top to bottom of tension cylinder drive tension bracket makes each tensioning roller control respectively and goes up each rolling tension on the wind-up roll, is convenient for adjust.

To sum up, the utility model discloses a beneficial technological effect does:

(1) thereby the removal through the first branch cutter of sliding drive and the second divides the cutter adjusts the width that the non-woven fabrics was cut, is used for supporting the feed cylinder and plays the effect of material loading through the material loading roller, drives the synchronous rotation of wind-up roll and lower wind-up roll through drive assembly and carries out the rolling work with the non-woven fabrics after cutting. Through this kind of mode, the operator of being convenient for adjusts the position of first branch cutter and second branch cutter according to the extension needs to thereby operating personnel divides the non-woven fabrics into the needs that different width satisfied production.

(2) The telescopic cylinder piston rod can drive the reciprocating motion of the feeding roller on the placing frame, the position of the feeding roller is limited through the feeding groove, the possibility that the feeding roller falls to the ground from the placing frame in the moving process can be effectively prevented through the limiting convex part, and the use safety of the equipment is improved.

(3) The rotation of the hand wheel drives the second slitting knife to reciprocate, so that the distance between the second slitting knife and the first slitting knife can be conveniently adjusted, and the non-woven fabric can be conveniently slit into different widths.

Drawings

FIG. 1 is a schematic view of an embodiment of the present invention taken along a shaft;

FIG. 2 is an axial view of the slitting section according to an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2, primarily for embodying the drive assembly;

fig. 4 is an axial view of the loading part according to an embodiment of the present invention;

fig. 5 is an axial view of the wrapping portion according to an embodiment of the present invention.

Reference numerals: 1. a frame; 2. placing a rack; 3. rotating the cylinder; 4. a feeding roller; 5. a charging barrel; 6. a lower cutter shaft; 7. a bed knife; 8. an upper tool rest; 9. a translation knife group; 91. a base; 92. a first slitting knife; 93. a second slitting knife; 94. a slipping cylinder; 95. a drive assembly; 951. fixing a plate; 952. a screw rod; 953. a slider; 954. a hand wheel; 10. a feeding bearing; 11. a feeding groove; 12. a limit bolt; 13. a limiting convex part; 14. a limiting component; 141. an upper roller; 142. a lower roller; 15. turning over the air cylinder; 16. a first motor; 17. a knife handle; 18. a lower wind-up roll; 19. winding the roller; 20. a second motor; 21. a flat roll; 22. fixing a roller; 23. a tension bracket; 24. a tension roller; 25. a tension cylinder.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to the attached drawing 1, the non-woven fabric slitting device comprises a rack 1, wherein a feeding portion, a slitting portion and a winding portion are sequentially arranged in the length direction of the rack 1, the feeding portion comprises two placing frames 2 which are respectively arranged on two sides of the width direction of the rack 1 in a rotating mode, and two rotating cylinders 3 which are respectively used for driving the placing frames 2 to rotate. The rotating cylinder 3 is hinged to the rack 1, and a piston rod of the rotating cylinder 3 is hinged to the placing rack 2. A feeding roller 4 is placed on the placing frame 2, and a charging barrel 5 is detachably arranged on the feeding roller 4.

With reference to fig. 2, the slitting part comprises a lower cutter shaft 6 arranged in the middle of the frame 1 and a driving part for driving the lower cutter shaft 6 to rotate, and a plurality of bottom cutters 7 arranged at equal intervals are sleeved on the lower cutter shaft 6. An upper knife rest 8 is arranged above the lower knife shaft 6, the upper knife rest 8 is rotatably arranged on the rack 1, two ends of one side, away from the rack 1, of the upper knife rest 8 are respectively provided with a translation knife group 9, each translation knife group 9 comprises a base 91 and a first cutting knife 92 and a second cutting knife 93 which are arranged on the base 91, the base 91 is slidably arranged on the upper knife rest 8 through a sliding groove extending along the axial direction of the upper knife rest 8, and the upper knife rest 8 is provided with two groups of sliding pieces which are respectively used for driving the two bases 91 to slide; in operation, the motion of sliding part drive base 91 drives the removal of first slitting knife 92 and second slitting knife 93 to adjust the width that the non-woven fabrics need cut, improve work efficiency.

Referring to fig. 1 and 4, the two ends of the feeding roller 4 are detachably fixed with feeding bearings 10, and a feeding groove 11 for limiting the feeding roller 4 is formed in one side of the placing frame 2 close to the rack 1. The rack 2 is connected with a limiting bolt 12 through threads, and the end part of the limiting bolt 12 extends into the feeding groove 11. A limiting convex part 13 is formed on one side of the placing frame 2, which is far away from the feeding groove 11; in operation, the feeding roller 4 is placed on the placing frame 2, the placing frame 2 is driven to rotate by the telescopic piston rod of the rotating cylinder 3, and the feeding roller 4 slides into the feeding groove 11. The stopper bolt 12 is adjusted so that the stopper bolt 12 abuts against the outer wall of the adjacent charging bearing 10, thereby defining the position of the charging roll 4.

A limiting component 14 is arranged between the feeding roller 4 and the slitting part, the limiting component 14 comprises an upper roller 141 and a lower roller 142 which are horizontally erected on the rack 1 and are arranged in parallel up and down, the upper roller 141 and the lower roller 142 are both rotatably erected on the rack 1, and a gap for the non-woven fabric to pass through is formed between the upper roller 141 and the lower roller 142; in operation, the upper roller 141 and the lower roller 142 cooperate to limit the nonwoven fabric.

Referring to the attached drawing 2, both sides of the frame 1 in the width direction are hinged with turnover cylinders 15, and piston rods of the two turnover cylinders 15 are respectively hinged with both sides of the upper tool rest 8 in the length direction; the up-and-down movement of the piston rod of the turning cylinder 15 drives the up-and-down movement of the upper tool rest 8.

The driving piece is a first motor 16, the first motor 16 is detachably fixed on the rack 1 through a bolt, and an output shaft of the first motor 16 is coaxially fixed with one end of the lower cutter shaft 6 through a coupler. The base 91 is provided with four detachable tool handles 17, and each first slitting tool 92 and each second slitting tool 93 are respectively arranged on the tool handles 17 in a one-to-one correspondence manner; when the first slitting knife 92 or the second slitting knife 93 is abraded greatly, the knife handle 17 is detached for replacement, and equipment maintenance is facilitated.

Referring to fig. 3, the sliding member is a sliding cylinder 94, the two sliding cylinders 94 are detachably fixed at two ends of the upper tool rest 8 through bolts, and piston rods of the two sliding cylinders 94 are fixedly connected with the two bases 91 respectively. The first slitting knife 92 is fixedly arranged on one side of the two bases 91 close to each other, the second slitting knife 93 is arranged on the bases 91 in a sliding manner along the axial direction of the upper knife rest 8, and two groups of driving assemblies 95 used for driving the two second slitting knives 93 to slide are arranged on the bases 91.

The driving assembly 95 includes a fixed plate 951 and a screw rod 952, wherein the fixed plate 951 is fixedly disposed on one side of the base 91 close to the sliding cylinder 94. A sliding block 953 is arranged below the second slitting knife 93, and a knife handle 17 adjacent to the sliding block 953 is detachably fixed on the sliding block 953 through a bolt. The screw rod 952 is horizontally and rotatably erected on the base 91, penetrates through the fixing plate 951 along the sliding direction of the second slitting knife 93 through threads, and is rotatably connected with the sliding block 953 at one end, and a hand wheel 954 is coaxially fixed at one end, far away from the sliding block 953, of the screw rod 952; the worker rotates the handwheel 954 to drive the screw 952 to synchronously rotate, and the second slitting knife 93 reciprocates under the rotation of the screw 952.

Referring to fig. 1 and 5, the winding part includes a lower winding roller 18 rotatably disposed on the frame 1, an upper winding roller 19 rotatably disposed above the lower winding roller 18, and a transmission assembly for driving the upper winding roller 19 and the lower winding roller 18 to rotate synchronously is disposed on the frame 1. The transmission assembly comprises a second motor 20 fixedly arranged on the rack 1, and the second motor 20 is in transmission connection with the upper winding roller 19 and the lower winding roller 18 through belt pulleys respectively; the rotation of the output shaft of the second motor 20 will drive the synchronous rotation of the upper wind-up roll 19 and the lower wind-up roll 18.

A flat roller 21 and a fixed roller 22 arranged below the flat roller 21 are fixed on the frame 1, and the flat roller 21 is arranged above the upper wind-up roller 19. Two tension brackets 23 which are distributed at intervals along the axial direction of the flat roller 21 are rotatably arranged on the flat roller 21 through bearings, and one side of each tension bracket 23, which is far away from the flat roller 21, is rotatably connected with a tension roller 24. Two tension cylinders 25 which are arranged in one-to-one correspondence with the tension brackets 23 are hinged on the fixed roller 22, and one side of each tension cylinder 25, which is far away from the fixed roller 22, is hinged with the adjacent tension bracket 23; the stretching of the piston rod of each tension cylinder 25 drives the tension bracket 23 to turn up and down, so that the distance between the tension roller 24 and the upper winding roller 19 can be conveniently adjusted, and the tension of the non-woven fabric of each winding part can be independently controlled.

The working principle of the embodiment is as follows: during operation, operating personnel locates feed cylinder 5 cover on material loading roller 4 to place material loading roller 4 on rack 2, rotate 3 piston rod extensions of cylinder afterwards and drive rack 2 and rotate and make material loading roller 4 roll to material loading recess 11 in, operating personnel makes material loading bearing 10 restricted in material loading recess 11 through screwing up spacing bolt 12. Subsequently, the shortening of the piston rod of the tilting cylinder 15 drives the upward lifting of the upper tool rest 8, so that a large gap is formed between the upper tool rest 8 and the lower tool shaft 6, and at the moment, the non-woven fabric is manually penetrated through the gap. An operator rotates the hand wheel 954 to adjust the relative distance between the second slitting knife 93 and the first slitting knife 92, and the telescopic driving base 91 of the piston rod of the sliding cylinder 94 moves on the upper knife rest 8 to drive the first slitting knife 92 and the second slitting knife 93 to move to the designated positions. Subsequently, the extension of the piston rod of the turnover cylinder 15 drives the upper tool rest 8 to move downwards, so that the first slitting knife 92 and the second slitting knife 93 are tightly abutted to the non-woven fabric, and the first motor 16 drives the lower tool shaft 6 to rotate, thereby realizing the cutting of the non-woven fabric. The second motor 20 drives the upper winding roller 19 and the lower winding roller 18 to rotate, so that the non-woven fabric winding work is realized. In this way, the operator can conveniently adjust the positions of the first slitting knife 92 and the second slitting knife 93 according to the stretching requirement, so that the operator can conveniently divide the non-woven fabric into different widths to meet the production requirement.

The above, only do the preferred embodiment of the present invention, not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a non-woven fabrics is with cutting device, includes frame (1), the length direction who follows frame (1) in frame (1) has set gradually material loading portion, has cut portion and coiling portion, its characterized in that: the feeding part comprises a feeding roller (4) arranged on the rack (1), and a charging barrel (5) is detachably arranged on the feeding roller (4); the slitting part comprises an upper knife rest (8) arranged at the middle position of a rack (1) and a lower knife shaft (6) rotatably arranged on the rack (1) and positioned below the upper knife rest (8), a driving piece for driving the lower knife shaft (6) to rotate is arranged on the rack (1), a plurality of bottom knives (7) distributed at intervals along the axial direction of the lower knife shaft (6) are sleeved on the lower knife shaft (6), translation knife groups (9) are arranged at two ends of the upper knife rest (8), each translation knife group (9) comprises a base (91) arranged on the upper knife rest (8) and a sliding piece for driving the base (91) to slide, and a first slitting knife (92) and a second slitting knife (93) are arranged on the base (91); the winding part comprises a lower winding roller (18) and an upper winding roller (19), wherein the lower winding roller (18) is rotatably arranged on the rack (1), the upper winding roller (19) is arranged on the upper side of the lower winding roller (18) at intervals, and a transmission assembly for driving the lower winding roller (18) and the upper winding roller (19) to synchronously rotate is further arranged on the rack (1).

2. A slitting device for non-woven fabrics according to claim 1, characterized in that: the sliding part is a sliding cylinder (94), a piston rod of the sliding cylinder (94) is fixedly connected with the base (91), the first cutting knife (92) is fixedly arranged on one side, far away from the sliding cylinder (94), of the base (91), the second cutting knife (93) is arranged on the base (91) in a sliding mode along the axis direction of the upper knife rest (8), and a driving assembly (95) used for driving the second cutting knife (93) to move is arranged on the base (91).

3. A slitting device for non-woven fabrics according to claim 2, characterized in that: the driving assembly (95) comprises a fixed plate (951) fixedly arranged on the base (91) and a lead screw (952) horizontally and rotatably arranged on the base (91), the lead screw (952) penetrates through the top plate along the sliding direction of the second slitting knife (93) in a threaded mode, one end of the lead screw is rotatably connected with the second slitting knife (93), and a hand wheel (954) is fixed to one end, far away from the second slitting knife (93), of the lead screw (952).

4. A slitting device for non-woven fabrics according to claim 1, characterized in that: the detachable is provided with a plurality of handle of a knife (17) that are the one-to-one setting with first branch cutter (92) and second branch cutter (93) respectively on base (91), first branch cutter (92) and second branch cutter (93) set up respectively on adjacent handle of a knife (17).

5. A slitting device for non-woven fabrics according to claim 1, characterized in that: the two ends of the upper tool rest (8) are hinged with turnover cylinders (15), and one side, away from the upper tool rest (8), of each turnover cylinder (15) is hinged to the rack (1).

6. A slitting device for non-woven fabrics according to claim 1, characterized in that: the feeding part further comprises two placing frames (2) which are arranged on two sides of the width direction of the rack (1) respectively, the placing frames (2) are close to one side of the rack (1) and provided with feeding grooves (11) used for placing the feeding rollers (4), the two ends of the feeding rollers (4) are connected with the feeding bearings (10) in a coaxial mode, the feeding rollers (4) are fixed with the inner shaft of the feeding bearings (10) in a coaxial mode, the placing frames (2) are connected with limiting bolts (12) in a threaded mode, and the limiting bolts (12) are abutted to the outer wall of the feeding bearings (10).

7. A slitting device for non-woven fabrics according to claim 6, characterized in that: frame (1) width direction both sides all articulate there are revolving cylinder (3), two the piston rod of revolving cylinder (3) is articulated with two rack (2) respectively, material loading recess (11) one side shaping is kept away from in rack (2) has spacing convex part (13).

8. A slitting device for non-woven fabrics according to claim 1, characterized in that: a limiting component (14) is arranged between the feeding roller (4) and the upper tool rest (8), and the limiting component (14) comprises an upper roller (141) horizontally and rotatably erected on the rack (1) and a lower roller (142) arranged on the lower side of the upper roller (141) at intervals in parallel.

9. A slitting device for non-woven fabrics according to claim 1, characterized in that: go up the upside of wind-up roll (19) and be equipped with plain-barreled roll (21) and decide roller (22), it is provided with a plurality of tension bracket (23) that are interval distribution to rotate on plain-barreled roll (21), it is provided with tension roller (24) to rotate on tension bracket (23), it has tension cylinder (25) to articulate on tension bracket (23), one side that tension bracket (23) were kept away from in tension cylinder (25) is connected with deciding roller (22) are articulated.