Adhesive bandage production equipment

Abstract

Adhesive bandage production equipment effectively solves the problem of low automation degree and comprises a rack, and an adhesive tape stripping mechanism, an absorption pad feeding mechanism, a release paper mounting mechanism, a waste collecting mechanism and a packaging mechanism are sequentially mounted on the rack from right to left. The adhesive tape stripping mechanism comprises an adhesive tape unwinding machine, an adhesive tape waste winding machine, a plurality of first transmission rollers, a stripping upper rubber roller and a stripping lower rubber roller. The absorption pad feeding mechanism comprises an absorption pad unwinding machine, a plurality of second transmission rollers, a plurality of third transmission rollers, an upper absorption pad feeding roller, a lower absorption pad feeding roller, an absorption pad cutter roller, a first positioning roller, a first adjusting roller, a second adjusting roller and a third adjusting roller. The release paper mounting mechanism comprises a first release paper unreeling machine, a second release paper unreeling machine, a plurality of fourth transmission rollers and a plurality of fifth transmission rollers; and the waste collecting mechanism comprises a negative pressure suction pipe, a punching cutter roller and a second positioning roller.

Description

Technical Field

[0001] The utility model belongs to the technical field of production equipment, in particular to a wound plaster production equipment. Background Art

[0002] Band-aids are used to care for superficial wounds such as small wounds, abrasions, and cuts. They are composed of medical tape, absorbent pads, and release paper. During the production process, band-aids are generally cut, punched, and bonded, and the remaining waste (including waste tape, waste release paper, etc.) is recycled. Finally, the finished product is packaged by a packaging device. Most of the existing equipment is semi-automatic production equipment. If the band-aid cannot be completed from raw materials to cutting to packaging paper packaging at one time, it will be contaminated, affecting product quality. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a bandage production equipment, which effectively solves the problem of low degree of automation.

[0004] The technical solution to the technical problem is: comprising a frame, on which are installed from right to left a tape stripping mechanism, an absorbent pad feeding mechanism, a release paper installation mechanism, a waste material collecting mechanism and a packaging mechanism;

[0005] The adhesive tape stripping mechanism comprises an adhesive tape unwinder, an adhesive tape waste winder, a plurality of first transmission rollers, an upper peeling rubber roller and a lower peeling rubber roller, wherein the upper peeling rubber roller is located directly above the lower peeling rubber roller, the adhesive tape is conveyed by the adhesive tape unwinder, the adhesive tape has its adhesive layer surface covered with a protective film, the adhesive tape first passes through the plurality of first transmission rollers, and then passes through the middle of the upper peeling rubber roller and the lower peeling rubber roller, the adhesive tape and the protective film are separated, and the protective film is wound to the adhesive tape waste winder;

[0006] The absorbent pad feeding mechanism comprises an absorbent pad unwinder, a plurality of second transmission rollers, a plurality of third transmission rollers, an absorbent pad feeding upper roller, an absorbent pad feeding lower roller, an absorbent pad cutting roller, a first positioning roller, a first adjusting roller, a second adjusting roller and a third adjusting roller, wherein the absorbent pad cutting roller is located directly above the first positioning roller, the first adjusting roller is located on the left side of the first positioning roller, the second adjusting roller is located obliquely above the first adjusting roller, and the third adjusting roller is located on the left side of the second adjusting roller, the adhesive tape first passes through the plurality of second transmission rollers, and then passes through the middle of the first adjusting roller and the first positioning roller, the absorbent pad unwinder outputs an absorbent pad, the absorbent pad first passes through the plurality of third transmission rollers, and then passes through the middle of the absorbent pad feeding upper roller and the absorbent pad feeding lower roller, and then the absorbent pad enters the middle of the absorbent pad cutting roller and the first positioning roller, the absorbent pad cutting roller intermittently cuts the absorbent pad, and the cut absorbent pad falls onto the adhesive tape of the first adjusting roller, and the adhesive tape and the absorbent pad as a whole pass through the second adjusting roller and the third adjusting roller in sequence;

[0007] The release paper installation mechanism includes a first release paper unwinder, a second release paper unwinder, a plurality of fourth transmission rollers, a plurality of fifth transmission rollers, a release paper pressing material upper roller and a release paper pressing material lower roller, the adhesive tape and the absorbent pad pass through the middle of the release paper pressing material upper roller and the release paper pressing material lower roller as a whole, the first release paper unwinder outputs the first release paper, the first release paper passes through the plurality of fourth transmission rollers, and then enters the middle of the release paper pressing material upper roller and the release paper pressing material lower roller, the first release paper is pasted on one side of the adhesive tape, the second release paper unwinder outputs the second release paper, the second release paper passes through the plurality of fifth transmission rollers, and then enters the middle of the release paper pressing material upper roller and the release paper pressing material lower roller, the second release paper is pasted on the other side of the adhesive tape, and the first release paper and the second release paper as a whole can completely cover the absorbent pad;

[0008] The waste collection mechanism includes a negative pressure suction pipe, a punching knife roller and a second positioning roller. The punching knife roller is located directly above the second positioning roller. The adhesive tape, the first release paper and the second release paper enter the middle of the punching knife roller and the second positioning roller as a whole. The punched waste is transported to the inside of the negative pressure suction pipe.

[0009] The packaging mechanism includes an upper packaging paper unwinder, multiple sixth transmission rollers, a lower packaging paper unwinder, multiple seventh transmission rollers, a fourth adjustment roller, a fifth adjustment roller, a paper cutter roller and a third positioning roller. The fourth adjustment roller is located directly above the fifth adjustment roller. The adhesive tape passes between the fourth adjustment roller and the fifth adjustment roller. The upper packaging paper unwinder outputs upper packaging paper. The upper packaging paper first passes through multiple sixth transmission rollers and then passes through the fourth adjustment roller. The fourth adjustment roller covers the upper packaging paper above the adhesive tape. The lower packaging paper unwinder outputs lower packaging paper. The lower packaging paper first passes through multiple seventh transmission rollers and then passes through the fifth adjustment roller. The fifth adjustment roller covers the lower packaging paper below the adhesive tape. The upper packaging paper and the lower packaging paper are pasted together. The upper packaging paper and the lower packaging paper pass as a whole between the paper cutter roller and the third positioning roller.

[0010] Preferably, a controller is installed on the rack.

[0011] Preferably, a knife pressing frame is provided above the absorbent pad cutting roller, punching cutting roller and paper cutting roller, and the knife pressing frame includes a support block, which is fixedly connected to the frame, and a plurality of screws are threadedly connected to the support block, a pressure block is fixed to the lower end of the screw, and a plurality of rollers are rotatably connected to the pressure block.

[0012] Compared with traditional equipment, the utility model has the following advantages: integrated design, high degree of automation, tape peeling, absorption pad sticking on the tape, release paper sticking, edge trimming and automatic packaging in packaging bags, streamlined operation, high work efficiency, ensuring product production quality, safety and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0015] Figure 3 It is a schematic diagram of the main view of the utility model.

[0016] Figure 4 It is a simplified schematic diagram of the production process of the utility model.

[0017] Figure 5 yes Figure 4 A is a schematic diagram of a partial enlargement.

[0018] Figure 6 yes Figure 4 B is a schematic diagram of a partial enlargement.

[0019] Figure 7 It is a schematic diagram of the adhesive tape peeling mechanism in the utility model.

[0020] Figure 8 It is a schematic diagram of the absorbent pad feeding mechanism in the utility model.

[0021] Fig. 9 It is a schematic diagram of the release paper installation mechanism in the utility model.

[0022] Figure numerals: 1, frame; 2, adhesive tape unwinder; 3, adhesive tape waste winder; 4, first transmission roller; 5, peeling upper adhesive roller; 6, peeling lower adhesive roller; 7, adhesive tape; 8, absorbent pad unwinder; 9, second transmission roller; 10, third transmission roller; 11, absorbent pad feeding upper roller; 12, absorbent pad feeding lower roller; 13, absorbent pad cutting roller; 14, first positioning roller; 15, first adjustment roller; 16, second adjustment roller; 17, third adjustment roller; 18, absorbent pad; 19, first release paper unwinder; 20, second release paper unwinder; 21, fourth transmission roller; 22 , the fifth transmission roller; 23, the upper roller for pressing the release paper; 24, the lower roller for pressing the release paper; 25, the first release paper; 26, the second release paper; 27, the negative pressure suction pipe; 28, the punching knife roller; 29, the second positioning roller; 30, the packaging paper unwinder; 31, the sixth transmission roller; 32, the lower packaging paper unwinder; 33, the seventh transmission roller; 34, the fourth adjustment roller; 35, the fifth adjustment roller; 36, the paper cutting knife roller; 37, the third positioning roller; 38, the upper packaging paper; 39, the lower packaging paper; 40, the controller; 41, the support block; 42, the screw; 43, the pressure block; 44, the roller. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0024] Depend on Figures 1 to 9Provided is a bandage production device, comprising a frame 1, on which are mounted, from right to left, an adhesive tape stripping mechanism, an absorbent pad feeding mechanism, a release paper mounting mechanism, a waste material collecting mechanism, and a packaging mechanism;

[0025] The adhesive tape stripping mechanism comprises an adhesive tape unwinder 2, an adhesive tape waste winder 3, a plurality of first transmission rollers 4, an upper stripping rubber roller 5 and a lower stripping rubber roller 6. The upper stripping rubber roller 5 is located directly above the lower stripping rubber roller 6. The adhesive tape unwinder 2 conveys an adhesive tape 7, the adhesive layer surface of the adhesive tape 7 is covered with a protective film, the adhesive tape 7 first passes through the plurality of first transmission rollers 4, and then passes through the middle of the upper stripping rubber roller 5 and the lower stripping rubber roller 6. The adhesive tape 7 is separated from the protective film, and the protective film is wound to the adhesive tape waste winder 3;

[0026] The absorbent pad feeding mechanism comprises an absorbent pad unwinding machine 8, a plurality of second transmission rollers 9, a plurality of third transmission rollers 10, an absorbent pad feeding upper roller 11, an absorbent pad feeding lower roller 12, an absorbent pad cutting roller 13, a first positioning roller 14, a first adjusting roller 15, a second adjusting roller 16 and a third adjusting roller 17. The absorbent pad cutting roller 13 is located directly above the first positioning roller 14, the first adjusting roller 15 is located on the left side of the first positioning roller 14, the second adjusting roller 16 is located obliquely above the first adjusting roller 15, and the third adjusting roller 17 is located on the left side of the second adjusting roller 16. The adhesive tape 7 first passes through a plurality of second transmission rollers 9, a plurality of third transmission rollers 10, an absorbent pad feeding upper roller 11, an absorbent pad feeding lower roller 12, an absorbent pad cutting roller 13, a first positioning roller 14, a first adjusting roller 15, a second adjusting roller 16 and a third adjusting roller 17. The absorption pad 18 is outputted from the absorption pad unwinding machine 8. The absorption pad 18 first passes through a plurality of third transmission rollers 10, and then passes through the absorption pad feeding upper roller 11 and the absorption pad feeding lower roller 12. Then, the absorption pad 18 enters between the absorption pad cutting roller 13 and the first positioning roller 14. The absorption pad cutting roller 13 performs intermittent cutting on the absorption pad 18. After cutting, the absorption pad 18 falls onto the adhesive tape 7 of the first adjustment roller 15. The adhesive tape 7 and the absorption pad 18 pass through the second adjustment roller 16 and the third adjustment roller 17 as a whole.

[0027] The release paper installation mechanism includes a first release paper unwinding machine 19, a second release paper unwinding machine 20, a plurality of fourth transmission rollers 21, a plurality of fifth transmission rollers 22, an upper release paper pressing roller 23 and a lower release paper pressing roller 24. The adhesive tape 7 and the absorbent pad 18 pass through the middle of the upper release paper pressing roller 23 and the lower release paper pressing roller 24 as a whole. The first release paper unwinding machine 19 outputs the first release paper 25, and the first release paper 25 passes through the plurality of fourth transmission rollers 21 and then enters the release paper unwinding machine 19. The first release paper 25 is pasted on one side of the adhesive tape 7 between the upper paper pressing roller 23 and the lower release paper pressing roller 24, and the second release paper unwinding machine 20 outputs the second release paper 26. The second release paper 26 passes through a plurality of fifth transmission rollers 22 and then enters between the upper release paper pressing roller 23 and the lower release paper pressing roller 24. The second release paper 26 is pasted on the other side of the adhesive tape 7. The first release paper 25 and the second release paper 26 can completely cover the absorbent pad 18 as a whole.

[0028] The waste collection mechanism includes a negative pressure suction pipe 27, a punching knife roller 28 and a second positioning roller 29. The punching knife roller 28 is located directly above the second positioning roller 29. The adhesive tape 7, the first release paper 25 and the second release paper 26 enter the middle of the punching knife roller 28 and the second positioning roller 29 as a whole, and the punched waste is transported to the inside of the negative pressure suction pipe 27.

[0029] The packaging mechanism includes an upper packaging paper unwinder 30, a plurality of sixth transmission rollers 31, a lower packaging paper unwinder 32, a plurality of seventh transmission rollers 33, a fourth adjustment roller 34, a fifth adjustment roller 35, a paper cutter roller 36 and a third positioning roller 37. The fourth adjustment roller 34 is located directly above the fifth adjustment roller 35. The adhesive tape 7 passes between the fourth adjustment roller 34 and the fifth adjustment roller 35. The upper packaging paper unwinder 30 outputs an upper packaging paper 38. The upper packaging paper 38 first passes through the plurality of sixth transmission rollers 31 and then passes through the plurality of sixth transmission rollers 31. After passing through the fourth adjustment roller 34, the fourth adjustment roller 34 covers the upper wrapping paper 38 above the adhesive tape 7, and the lower wrapping paper unwinder 32 outputs the lower wrapping paper 39. The lower wrapping paper 39 first passes through multiple seventh transmission rollers 33, and then passes through the fifth adjustment roller 35. The fifth adjustment roller 35 covers the lower wrapping paper 39 under the adhesive tape 7. The upper wrapping paper 38 and the lower wrapping paper 39 are pasted together, and the upper wrapping paper 38 and the lower wrapping paper 39 pass as a whole between the paper cutting knife roller 36 and the third positioning roller 37.

[0030] A controller 40 is installed on the frame 1 .

[0031] In order to facilitate the adjustment of the position of the cutter, a knife pressing frame is provided above the absorption pad cutting roller 13, the punching cutting roller 28 and the paper cutting roller 36, and the knife pressing frame includes a support block 41, the support block 41 is fixedly connected to the frame 1, a plurality of screws 42 are threadedly connected to the support block 41, a pressing block 43 is fixed to the lower end of the screw 42, and a plurality of rollers 44 are rotatably connected to the pressing block 43.

[0032] When the utility model is in use, the adhesive tape unwinding machine 2 conveys an adhesive tape 7, the adhesive layer surface of the adhesive tape 7 is covered with a protective film, the adhesive tape 7 passes through the first transmission roller 4, and then passes through the middle of the peeling upper adhesive roller 5 and the peeling lower adhesive roller 6, the adhesive tape 7 after passing through is separated from the protective film, the protective film is wound to the adhesive tape waste winder 3, the adhesive layer of the adhesive tape 7 is exposed, the exposed adhesive tape 7 continues to move to the left, the adhesive tape 7 passes through the second transmission roller 9, and then passes through the middle of the first adjustment roller 15 and the first positioning roller 14, the absorbent pad unwinding machine 8 outputs an absorbent pad 18, the absorbent pad 18 passes through the third transmission roller 10, and then passes through the middle of the absorbent pad feeding upper roller 11 and the absorbent pad feeding lower roller 12, the absorbent pad feeding upper roller 11 is located directly above the absorbent pad feeding lower roller 12, and then the absorbent pad 18 enters between the absorbent pad cutting roller 13 and the first positioning roller 14, the absorbent pad cutting roller 13 intermittently cuts the absorbent pad 18, and the cut absorbent pad 18 falls to the first adjustment roller 1 5, the adhesive tape 7 and the absorbent pad 18 pass through the second adjustment roller 16 and the third adjustment roller 17 in sequence, the first release paper unwinder 19 outputs the first release paper 25, the first release paper 25 passes through the fourth transmission roller 21, and then enters between the release paper pressing material upper roller 23 and the release paper pressing material lower roller 24, the release paper pressing material upper roller 23 is located directly above the release paper pressing material lower roller 24, the first release paper 25 is pasted on one side of the adhesive tape 7, and the second release paper unwinder 20 outputs The second release paper 26 passes through a plurality of fifth transmission rollers 22, and then enters between the release paper pressing roller 23 and the release paper pressing roller 24. The second release paper 26 is pasted on the other side of the adhesive tape 7. The first release paper 25 and the second release paper 26 can completely cover the absorbent pad 18 as a whole. The first release paper 25 and the second release paper 26 overlap each other, so that the user does not touch the absorbent pad 18 when tearing off the release paper, thereby ensuring the hygiene of the absorbent pad 18;

[0033] The adhesive tape 7 continues to move to the left, and the adhesive tape 7, the first release paper 25 and the second release paper 26 enter the middle of the punching knife roller 28 and the second positioning roller 29 as a whole. The waste material after punching is transported to the inside of the negative pressure suction pipe 27, and the upper packaging paper unwinding machine 30 outputs an upper packaging paper 38. The upper packaging paper 38 first passes through the sixth transmission roller 31, and then passes through the fourth adjustment roller 34. The fourth adjustment roller 34 covers the upper packaging paper 38 above the adhesive tape 7. The lower packaging paper unwinding machine 32 outputs a lower packaging paper 39. The lower packaging paper 39 first passes through the seventh transmission roller 33, and then passes through the fifth adjustment roller 35. The fifth adjustment roller 35 covers the lower packaging paper 39 under the adhesive tape 7. The upper packaging paper 38 and the lower packaging paper 38 are The wrapping papers 39 are pasted together, and the upper wrapping paper 38 and the lower wrapping paper 39 pass through the middle of the paper cutter roller 36 and the third positioning roller 37 as a whole. The paper cutter roller 36 cuts the continuous wound plaster into independently packaged wound plasters. In addition, the first transmission roller 4, the second transmission roller 9, the third transmission roller 10, the fourth transmission roller 21, the fifth transmission roller 22, the sixth transmission roller 31 and the seventh transmission roller 33 are all equipped with brake correctors. The adhesive tape stripping mechanism, the absorbent pad feeding mechanism, the release paper installation mechanism, the waste collection mechanism and the packaging mechanism are processed in sequence from right to left on the frame 1, and the assembly line operation is carried out to realize the automated production of wound plasters, with high work efficiency and good product quality.

[0034] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the protection scope of the technical solution of the utility model.

Claims

1. A wound dressing production device, characterized in that: The machine frame (1) comprises a tape stripping mechanism, an absorbent pad feeding mechanism, a release paper installation mechanism, a waste material collection mechanism and a packaging mechanism, which are sequentially installed on the machine frame (1) from right to left; The adhesive tape stripping mechanism comprises an adhesive tape unwinder (2), an adhesive tape waste winding machine (3), a plurality of first transmission rollers (4), an upper stripping rubber roller (5) and a lower stripping rubber roller (6), wherein the upper stripping rubber roller (5) is located directly above the lower stripping rubber roller (6), the adhesive tape unwinder (2) conveys an adhesive tape (7), the adhesive layer surface of the adhesive tape (7) is covered with a protective film, the adhesive tape (7) first passes through the plurality of first transmission rollers (4), and then passes through the middle of the upper stripping rubber roller (5) and the lower stripping rubber roller (6), the adhesive tape (7) and the protective film are separated, and the protective film is wound onto the adhesive tape waste winding machine (3); The absorbent pad feeding mechanism comprises an absorbent pad unwinding machine (8), a plurality of second transmission rollers (9), a plurality of third transmission rollers (10), an absorbent pad feeding upper roller (11), an absorbent pad feeding lower roller (12), an absorbent pad cutting roller (13), a first positioning roller (14), a first adjustment roller (15), a second adjustment roller (16) and a third adjustment roller (17). The absorbent pad cutting roller (13) is located directly above the first positioning roller (14), the first adjustment roller (15) is located on the left side of the first positioning roller (14), the second adjustment roller (16) is located obliquely above the first adjustment roller (15), and the third adjustment roller (17) is located on the left side of the second adjustment roller (16). The adhesive tape (7) first passes through the plurality of second transmission rollers and the absorbent pad feeding upper roller (11), the absorbent pad feeding lower roller (12), the absorbent pad cutting roller (13), the first positioning roller (14), the first adjustment roller (15), the second adjustment roller (16) and the third adjustment roller (17). The absorbent pad (18) is outputted from the absorbent pad unwinding machine (8) after passing through a plurality of third transmission rollers (10) and then passing through between the absorbent pad feeding upper roller (11) and the absorbent pad feeding lower roller (12). The absorbent pad (18) then enters between the absorbent pad cutting roller (13) and the first positioning roller (14). The absorbent pad cutting roller (13) intermittently cuts the absorbent pad (18). After being cut, the absorbent pad (18) falls onto the adhesive tape (7) of the first adjustment roller (15). The adhesive tape (7) and the absorbent pad (18) as a whole pass through the second adjustment roller (16) and the third adjustment roller (17) in sequence. The release paper installation mechanism comprises a first release paper unwinding machine (19), a second release paper unwinding machine (20), a plurality of fourth transmission rollers (21), a plurality of fifth transmission rollers (22), an upper release paper pressing roller (23) and a lower release paper pressing roller (24); the adhesive tape (7) and the absorbent pad (18) pass through the middle of the upper release paper pressing roller (23) and the lower release paper pressing roller (24); the first release paper unwinding machine (19) outputs the first release paper (25); the first release paper (25) passes through the plurality of fourth transmission rollers (21) and then enters the release paper unwinding machine. The first release paper (25) is adhered to one side of the adhesive tape (7) between the paper pressing upper roller (23) and the release paper pressing lower roller (24); the second release paper unwinder (20) outputs the second release paper (26); the second release paper (26) passes through a plurality of fifth transmission rollers (22) and then enters between the release paper pressing upper roller (23) and the release paper pressing lower roller (24); the second release paper (26) is adhered to the other side of the adhesive tape (7); the first release paper (25) and the second release paper (26) as a whole can completely cover the absorbent pad (18); The waste material collection mechanism comprises a negative pressure suction pipe (27), a punching knife roller (28) and a second positioning roller (29), wherein the punching knife roller (28) is located directly above the second positioning roller (29), and the adhesive tape (7), the first release paper (25) and the second release paper (26) as a whole enter between the punching knife roller (28) and the second positioning roller (29), and the punched waste material is transported to the inside of the negative pressure suction pipe (27); The packaging mechanism comprises an upper packaging paper unwinder (30), a plurality of sixth transmission rollers (31), a lower packaging paper unwinder (32), a plurality of seventh transmission rollers (33), a fourth adjustment roller (34), a fifth adjustment roller (35), a paper cutter roller (36) and a third positioning roller (37), wherein the fourth adjustment roller (34) is located directly above the fifth adjustment roller (35), the adhesive tape (7) passes between the fourth adjustment roller (34) and the fifth adjustment roller (35), the upper packaging paper unwinder (30) outputs an upper packaging paper (38), the upper packaging paper (38) first passes through the plurality of sixth transmission rollers (31), and then passes through the plurality of sixth transmission rollers (31). The upper wrapping paper (38) passes through a fourth adjustment roller (34), which covers the upper part of the adhesive tape (7). The lower wrapping paper unwinder (32) outputs the lower wrapping paper (39). The lower wrapping paper (39) first passes through a plurality of seventh transmission rollers (33), and then passes through a fifth adjustment roller (35). The fifth adjustment roller (35) covers the lower wrapping paper (39) below the adhesive tape (7). The upper wrapping paper (38) and the lower wrapping paper (39) are adhered to each other, and the upper wrapping paper (38) and the lower wrapping paper (39) pass as a whole between the paper cutter roller (36) and the third positioning roller (37).

2. The wound dressing production equipment according to claim 1, characterized in that: A controller (40) is installed on the frame (1).

3. The wound dressing production equipment according to claim 1, characterized in that: A knife pressing frame is provided above the absorbent pad cutting roller (13), the punching cutting roller (28) and the paper cutting roller (36), and the knife pressing frame comprises a support block (41), the support block (41) is fixedly connected to the frame (1), a plurality of screw rods (42) are threadedly connected to the support block (41), a pressing block (43) is fixed at the lower end of the screw rod (42), and a plurality of rollers (44) are rotatably connected to the pressing block (43).

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