CN221501542U - Cloth feeding device of rotary screen printing machine - Google Patents

Abstract

The utility model discloses a cloth feeding device of a rotary screen printing machine, which comprises a frame, wherein two first rollers are rotatably connected to the frame, the two first rollers are distributed along the conveying direction of cloth and are abutted against the lower surface of the cloth, the axial direction of each first roller is horizontally arranged and perpendicular to the conveying direction of the cloth, a cleaning mechanism is arranged on the frame and is positioned between the two first rollers, the cleaning mechanism comprises a scraper, a wool suction cover and an air suction assembly, the scraper is perpendicular to the conveying direction of the cloth and abutted against the upper surface of the cloth, a connecting mechanism is arranged on the frame, the scraper is detachably connected to the frame through the connecting mechanism, a suction Mao Zhao is arranged on the frame and is positioned on one side of the scraper close to a cloth feeding end, the opening of the wool suction cover is downward, and the air suction assembly is arranged on the frame and is connected with the wool suction cover. According to the utility model, the scraper is detachably connected to the frame, so that an operator can conveniently replace the scraper, and the possibility of influencing the using effect of the scraper due to damage or insufficient sharpness of the scraper is reduced.

Description

Cloth feeding device of rotary screen printing machine

Technical Field

The utility model relates to the technical field of printing equipment, in particular to a cloth feeding device of a rotary screen printing machine.

Background

The rotary screen printing is a printing mode that color paste in a rotary screen is printed on fabrics under the driving of pressure by utilizing a scraper, and the rotary screen printing machine has the advantages of low labor intensity, high production efficiency and strong adaptability to the fabrics and is generally composed of four parts of a cloth feeding device, a printing device, a drying device and a cloth falling device.

The Chinese patent with the publication number of CN209336276U discloses a cloth pretreatment device for rotary screen printing, which comprises a top plate, a hairbrush mounting plate, a first heating roller, a roller shaft mounting plate, an air inlet head, a scraper plate, a first carrier roller, an electrohydraulic push rod, a second heating roller, a bottom plate, mounting feet, a second carrier roller, a second scraper head, an air nozzle, a first scraper head, a cavity and a scraper mounting plate. In operation, the first scraper head and the second scraper head are used for scraping dirt adhered to the top surface of the textile fabric, so that the occurrence of the condition that dirt and thread ends block color paste is reduced.

The device as described above, the operator need dismantle, more troublesome when changing the scraper, but the long-time work down the scraper probably appear damaging or not sharp enough possibility, if do not carry out timely dismantlement, the change to the scraper, can influence the result of use of scraper, be unfavorable for improving the quality of weaving cloth stamp.

Disclosure of utility model

In order to facilitate the disassembly and replacement of the scraper by operators, thereby reducing the possibility of influencing the using effect of the scraper due to the damage or the inadequacy of sharpness of the scraper, the utility model provides a cloth feeding device of a rotary screen printing machine.

The utility model provides a cloth feeding device of a rotary screen printing machine, which adopts the following technical scheme:

The utility model provides a rotary screen printing machine's cloth feeding device, includes the frame, it is connected with two first rollers to rotate in the frame, two first roller distributes and contradicts in the cloth lower surface along the direction of delivery of cloth, the axial level of first roller sets up and perpendicular to the direction of delivery of cloth, be provided with clearance mechanism in the frame, clearance mechanism is located between two first rollers and is used for clearing up miscellaneous batting on the cloth, clearance mechanism includes scraper, wool suction cover and air extraction component, scraper perpendicular to the direction of delivery of cloth and contradict in the cloth upper surface, be provided with coupling mechanism in the frame, the scraper passes through coupling mechanism detachable connection in the frame, inhale Mao Zhao setting in the frame and be located one side that the scraper is close to the cloth feeding end, the opening of wool suction cover is downward, air extraction component sets up in the frame and is connected with wool suction cover, the subassembly is used for providing the miscellaneous batting and impurity of sucking away on the cloth.

Through adopting above-mentioned technical scheme, first roller plays the cloth guiding effect, advance the cloth in-process, operating personnel lays the cloth at the top of first roller and lets the cloth pass through the scraper, the scraper is contradicted in the upper surface of cloth all the time in the cloth motion in-process for the scraper can scrape the miscellaneous batting on the cloth upper surface, and the miscellaneous batting that will scrape down is followed to the wool suction hood under the effect of bleed assembly, reduces the possibility that contains miscellaneous batting on the cloth, and in the work, the scraper passes through coupling mechanism and can dismantle and connect in the frame, makes things convenient for operating personnel to change the scraper, reduces because of the scraper damages or not sharp possibility that influences the scraper result of use enough.

Optionally, coupling mechanism includes a pair of coupling assembling, a pair of coupling assembling is located the cloth both sides, coupling assembling sets up in the frame, coupling assembling includes fixed cover, sliding block and mounting, fixed cover sets up in the frame, a pair of first groove has been seted up on the terminal surface that fixed cover is close to each other, sliding block horizontal insertion in first inslot, a pair of square second groove has been seted up on the terminal surface that sliding block is close to each other, peg graft respectively in a pair of second inslot at the both ends of scraper, the mounting sets up on fixed cover and is used for locking the position of sliding block.

Through adopting above-mentioned technical scheme, when dismantling, change the scraper, operating personnel releases the locking of mounting to the piece that slides, and the piece that slides can slide in first groove afterwards, and when the piece that slides to the direction of keeping away from the scraper, the scraper can break away from the second groove to realize the dismantlement of scraper, rational in infrastructure, easy operation.

Optionally, the fixed sleeve is provided with a threaded hole, the side wall of the sliding block close to the threaded hole is provided with a threaded groove, and the fixing piece comprises a locking bolt which is in threaded connection with the threaded hole and is in threaded connection with the threaded groove.

Through adopting the technical scheme, when the scraper needs to be disassembled, an operator manually screws the locking bolt, and when the locking bolt is separated from the thread groove, the operator can push the two sliding blocks to slide in the directions away from each other until the scraper is separated from the second groove; when the scraper needs to be installed, an operator slides and connects the two ends of the scraper to the second groove, then pushes the two sliding blocks to slide, and when the threaded groove on the sliding block is aligned with the threaded hole, the operator screws the locking bolt to be in threaded connection with the threaded groove, so that the position of the scraper can be fixed.

Optionally, the vertical lift of coupling mechanism sets up in the frame, be provided with the lifting unit who is used for driving coupling mechanism and goes up and down in the frame.

Through adopting above-mentioned technical scheme, elevating system can drive coupling mechanism and go up and down along vertical direction, and coupling mechanism's lift can drive the scraper and go up and down, and the adjustability of scraper height position for the scraper can contradict on the cloth surface of different thickness, has improved the commonality of device.

Optionally, the lifting assembly comprises two lifting cylinders, the lifting cylinders are in one-to-one correspondence with the connecting assemblies and are arranged on the frame, and the fixing sleeve is arranged on a piston rod of the lifting cylinder.

Through adopting above-mentioned technical scheme, the flexible fixed cover that drives of lift cylinder piston rod is gone up and down along vertical direction, and the lift of fixed cover drives the slider and goes up and down, and the lift of slider can drive the scraper and go up and down to when making the thickness of cloth change, the scraper can also contradict on the surface of cloth, simple structure, convenient operation.

Optionally, rotate in the frame and be connected with the second roller, the second roller is located the one side that the first roller is close to the cloth end and is parallel with the first roller, the second roller is contradicted in the lower surface of cloth, be provided with the straining device who is used for tensioning the cloth in the frame, straining device is located between first roller and the second roller.

Through adopting above-mentioned technical scheme, the phenomenon of relaxation can appear in the cloth motion in-process, and the cloth can probably make the miscellaneous batting on the cloth can not be scraped after relaxing, through setting up straining device for the cloth is in tensioning state as far as possible when passing through the scraper, reduces because of the cloth is lax and makes the clearance effect of clearance mechanism to miscellaneous batting on the cloth reduce, influences the possibility of the follow-up stamp effect of cloth.

Optionally, straining device includes a pair of actuating assembly and tensioning roller, a pair of actuating assembly is located the cloth both sides, actuating assembly includes supporting shoe, motor, lead screw and connecting block, the supporting shoe sets up in the frame, the supporting shoe has seted up the removal groove on being close to the lateral wall of cloth, the lead screw rotates to be connected in the removal inslot and vertical setting, the motor sets up on the supporting shoe and the output shaft is connected with the lead screw, connecting block threaded connection is on the lead screw and slide and be connected in the removal inslot, the both ends of tensioning roller rotate respectively and connect on a pair of connecting block and contradict in the cloth upper surface, tensioning roller level sets up and the axial is perpendicular with the direction of delivery of cloth.

Through adopting above-mentioned technical scheme, advance cloth in-process cloth from the bottom of tensioning roller and pass through, in the work, when the cloth is lax, operating personnel starts two motors of simultaneous start, and the rotation of motor output shaft drives the lead screw and rotates, and the rotation of lead screw drives the connecting block and removes along vertical direction, and the motion of connecting block drives the tensioning roller motion, when the tensioning roller contradicts on the cloth surface, operating personnel close simultaneously two motors can.

Optionally, the subassembly of bleeding includes exhaust tube, aspiration pump and collecting box, the collecting box sets up in the frame, the exhaust tube sets up on the collecting box, the one end that the collecting box was kept away from to the exhaust tube is connected with the hair-suction hood, the aspiration pump sets up on the collecting box and communicates with the collecting box cavity.

Through adopting above-mentioned technical scheme, start the aspiration pump, the miscellaneous batting that scrapes down on the cloth can be absorbed to the suction hood under the effect of aspiration pump, and the miscellaneous batting of extraction is absorbed the back through the suction hood and is flowed into the collection box through the extraction pipe, and in the work starts the aspiration pump all the time, reduces the miscellaneous batting of scraping and piles up too much and influence the possibility of scraper work effect in scraper one side, reduces simultaneously and scrapes the miscellaneous batting of scraping and float the back again and fall the possibility on the cloth surface that has been handled through the scraper in the sky.

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

1. the cloth is scraped the miscellaneous batting on the cloth upper surface through scraper when the scraper, reduces the possibility that contains miscellaneous batting on the cloth, and in the work, the scraper passes through coupling mechanism and can dismantle to be connected in the frame, makes things convenient for operating personnel to change the scraper, reduces because of the scraper damages or not sharp possibility that influences scraper result of use enough.

2. The adjustability of the scraper position enables the scraper to be abutted against the cloth surfaces with different thicknesses, and the universality of the device is improved.

3. In operation, the tensioning mechanism is used for tensioning the cloth, so that the cleaning effect of the cleaning mechanism on the miscellaneous batting on the cloth is reduced due to the loosening of the cloth, and the possibility of influencing the subsequent printing effect of the cloth is reduced.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present application.

Fig. 2 is a schematic view of the doctor blade, attachment mechanism and lifting assembly of fig. 1.

Fig. 3 is an exploded view of the connection assembly of fig. 2.

Fig. 4 is a cross-sectional view of the connection assembly of fig. 3.

Fig. 5 is a cross-sectional view of the tensioning mechanism of fig. 1.

Reference numerals illustrate:

1. A frame; 11. a first roller; 12. a second roller; 13. a first lever; 14. a second lever; 15. a first plate; 16. a third lever; 17. a handle; 18. a portal frame; 2. a cleaning mechanism; 21. a scraper; 22. suction Mao Zhao; 23. an air extraction assembly; 231. an exhaust pipe; 232. an air extracting pump; 233. a collection box; 3. a connecting mechanism; 31. a connection assembly; 311. a fixed sleeve; 312. a sliding block; 313. a fixing member; 3131. a locking bolt; 314. a first groove; 315. a second groove; 316. a threaded hole; 317. a thread groove; 4. a lifting assembly; 41. a lifting cylinder; 5. a tensioning mechanism; 51. a drive assembly; 511. a support block; 512. a motor; 513. a screw rod; 514. a connecting block; 52. a tension roller; 54. and a moving groove.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-5.

The embodiment of the application discloses a cloth feeding device of a rotary screen printing machine, which comprises a horizontally arranged frame 1, wherein four first rods 13 which are vertically arranged are fixedly connected to the upper surface of the frame 1, each two first rods 13 are in a group, the two groups of first rods 13 are distributed along the movement direction of cloth, the two first rods 13 in each group of first rods 13 are distributed along the width direction of the cloth and are positioned at two sides of the cloth, the two groups of first rods 13 are respectively and rotatably connected with a first roller 11, the axial direction of the first rollers 11 is horizontally arranged and is perpendicular to the conveying direction of the cloth, and the side walls of the two first rollers 11 are in contact with the lower surface of the cloth and the axial lines of the two first rollers are in the same horizontal plane.

Referring to fig. 1, a cleaning mechanism 2 is disposed on an upper surface of a frame 1, the cleaning mechanism 2 is used for cleaning foreign flocks on an upper surface of a cloth, the cleaning mechanism 2 is located between two first rollers 11, and the cleaning mechanism 2 includes a scraper 21, a suction hood 22 and an air extraction assembly 23.

Referring to fig. 1 and 2, fixedly connected with portal frame 18 on the upper surface of frame 1, portal frame 18 includes two vertical setting's riser and fixed connection in the roof on riser top, fixedly connected with lifting unit 4 on the roof of portal frame 18, lifting unit 4 includes two lift cylinders 41, two lift cylinders 41 distribute and lie in the both sides of cloth along the width direction of cloth, lift cylinder 41 fixedly connected with upper surface and the piston rod of portal frame 18 are flexible along vertical direction, be provided with coupling mechanism 3 on the piston rod of lift cylinder 41, scraper 21 can dismantle through coupling mechanism 3 and connect on the piston rod of lift cylinder 41, scraper 21 perpendicular to the direction of delivery of cloth and conflict in the upper surface of cloth, the flexible coupling mechanism 3 that drives of lift cylinder 41 piston rod goes up and down, the lift of coupling mechanism 3 can drive scraper 21 and go up and down for scraper 21 can conflict in the cloth upper surface of different thickness.

Referring to fig. 2 and 3, the connection mechanism 3 includes a pair of connection assemblies 31, the connection assemblies 31 are respectively in one-to-one correspondence with the lifting cylinders 41 and are located at two sides of the cloth, the connection assemblies 31 are fixedly connected to piston rods of the lifting cylinders 41, the connection assemblies 31 include fixing sleeves 311, sliding blocks 312 and fixing pieces 313, the fixing sleeves 311 are fixedly connected to the piston rods of the lifting cylinders 41 and are parallel to the width direction of the cloth in the length direction, square first grooves 314 are formed in side walls, close to each other, of the pair of fixing sleeves 311, the length direction of the first grooves 314 is parallel to the length direction of the fixing sleeves 311, and the sliding blocks 312 are connected in the first grooves 314 in a sliding mode and slide along the length direction of the first grooves 314.

Referring to fig. 2 and 3, a pair of sliding blocks 312 are provided with square second grooves 315 on the side walls thereof, the length direction of the second grooves 315 is parallel to the length direction of the first grooves 314, two ends of the scraper 21 are respectively inserted into the pair of second grooves 315, and the fixing member 313 is disposed on the fixing sleeve 311 and is used for locking the sliding blocks 312.

Referring to fig. 3 and 4, the fixing member 313 includes a locking bolt 3131, a threaded hole 316 penetrating through the upper surface of the fixing sleeve 311 is formed in the upper surface of the fixing sleeve 311, a threaded groove 317 is formed in the surface of the sliding block 312, which is close to the threaded hole 316, the threaded groove 317 is located at one end of the sliding block 312, which is far away from the second groove 315, the locking bolt 3131 is in threaded connection with the threaded hole 316 and is in threaded connection with the threaded groove 317, and a handle 17, which is convenient for an operator to screw the locking bolt 3131, is fixedly connected to the upper end of the locking bolt 3131.

Referring to fig. 1, two vertically arranged second rods 14 are fixedly connected to the upper surface of the frame 1, the two second rods 14 are located on one side of the scraper 21 close to the cloth feeding end and between the scraper 21 and the first rod 13, the two second rods 14 are located on two sides of cloth and distributed along the width direction of the cloth, the wool suction cover 22 is fixedly connected to the second rods 14 and located above the cloth, the wool suction cover 22 is horizontally arranged and opened downwards, and the wool suction cover 22 is located on one side of the scraper 21 close to the cloth feeding end.

Referring to fig. 1, the air extraction assembly 23 is disposed on the frame 1 and connected with the suction hood 22, the air extraction assembly 23 is used for providing suction force for sucking away foreign flocks on the cloth, the air extraction assembly 23 includes an air extraction pipe 231, an air extraction pump 232 and a collecting box 233, the collecting box 233 is fixedly connected on the upper surface of the frame 1 and horizontally disposed, one end of the air extraction pipe 231 is fixedly connected on the upper surface of the collecting box 233, the other end is fixedly connected on the upper surface of the suction hood 22, a first plate 15 is fixedly connected on a side wall of the collecting box 233 far from the cloth, the first plate 15 is horizontally disposed, and the air extraction pump 232 is fixedly connected on the upper surface of the first plate 15 and connected with the collecting box 233.

Referring to fig. 1 and 5, two third bars 16 are fixedly connected to the upper surface of the frame 1, the third bars 16 are distributed along the width direction of the cloth and located at one side of the second bars 14 close to the cloth feeding end, the second rollers 12 are rotatably connected to the third bars 16, the axial direction of the second rollers 12 is parallel to the width direction of the cloth, and the side walls of the second rollers are abutted against the lower surface of the cloth.

Referring to fig. 1 and 5, a tensioning mechanism 5 for tensioning cloth is disposed on a frame 1, the tensioning mechanism 5 is located between a first roller 11 and a second roller 12, the tensioning mechanism 5 includes a pair of driving assemblies 51 and tensioning rollers 52, the driving assemblies 51 are distributed along the width direction of the cloth and located at two sides of the cloth, the driving assemblies 51 include supporting blocks 511, a motor 512, a screw rod 513 and connecting blocks 514, the supporting blocks 511 are fixedly connected to the upper surface of the frame 1 and vertically disposed, moving grooves 54 vertically disposed in the length direction are formed in side walls, which are close to each other, of the supporting blocks 511, the screw rod 513 is rotatably connected to the moving grooves 54 and vertically disposed, the motor 512 is fixedly connected to the upper surface of the supporting blocks 511 and the output shaft is connected to the upper end of the screw rod 513, the connecting blocks 514 are in threaded connection with the screw rod 513 and slidably connected to the moving directions, two ends of the tensioning rollers 52 are rotatably connected to the side walls, which are close to each other, of the two connecting blocks 514 are in contact with the upper surface of the cloth, and the tensioning rollers 52 are parallel to the second roller 12.

The implementation principle of the cloth feeding device of the rotary screen printing machine provided by the embodiment of the application is as follows:

In the cloth feeding process, an operator lays cloth on the top of the first roller 11 and enables the cloth to pass through from the lower part of the scraper 21, then the lifting cylinder 41 is started, a piston rod of the lifting cylinder 41 stretches downwards to drive the fixed sleeve 311 to move downwards, the fixed sleeve 311 moves to drive the sliding block 312 to move downwards, the sliding block 312 moves downwards to drive the scraper 21 to move downwards when in downward movement, when the scraper 21 is abutted against the upper surface of the cloth, the lifting cylinder 41 stops driving the scraper 21 to move, and in the cloth moving process, the scraper 21 can scrape off miscellaneous batting on the upper surface of the cloth, so that the possibility that the miscellaneous batting influences the cloth printing effect is reduced.

The air pump 232 is always started in the operation of the scraper 21, the wool suction cover 22 can suck the impurity batting scraped off the cloth under the action of the air pump 232, and the sucked impurity is sucked by the wool suction cover 22 and then flows into the collecting box 233 through the air suction pipe 231.

The scraper 21 can be insufficiently sharp or damaged under long-time working, so that the scraper 21 can not better scrape off mixed cotton on cloth, when the scraper 21 needs to be disassembled and replaced, an operator screws the handle 17, the rotation of the handle 17 drives the locking bolt 3131 to rotate, and when the locking bolt 3131 is completely separated from the thread groove 317, the operator pushes the two sliding blocks 312 to move in the directions away from each other until the scraper 21 is separated from the second groove 315, so that the scraper 21 can be disassembled; when the scraper 21 is installed, an operator slides and connects two ends of the scraper 21 in the second groove 315, then the operator pushes the two sliding blocks 312 to slide, and when the thread groove 317 on the sliding block 312 is aligned with the communication hole 316, the operator screws the locking bolt 3131 to be in threaded connection with the thread groove 317, so that the position of the scraper 21 can be fixed.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (8)

1. The utility model provides a cloth feeding device of circular screen printer which characterized in that: including frame (1), rotate on frame (1) and be connected with two first rollers (11), two first rollers (11) are distributed and are contradicted in the cloth lower surface along the direction of delivery of cloth, the axial level of first rollers (11) sets up and the direction of delivery of perpendicular to cloth, be provided with clearance mechanism (2) on frame (1), clearance mechanism (2) are located between two first rollers (11) and are used for clearing up miscellaneous batting on the cloth, clearance mechanism (2) include scraper (21), inhale Mao Zhao (22) and bleed subassembly (23), the direction of delivery of scraper (21) perpendicular to cloth just contradicts in the cloth upper surface, be provided with coupling mechanism (3) on frame (1), scraper (21) are detachably connected in frame (1) through coupling mechanism (3), inhale Mao Zhao (22) and be located one side that scraper (21) are close to the cloth end, inhale the opening of Mao Zhao (22) and inhale Mao Zhao (22) and bleed subassembly (23) and set up in frame (1) and inhale that the suction subassembly Mao Zhao is used for providing miscellaneous batting on the cloth.

2. A rotary screen printing machine cloth feeding device according to claim 1, wherein: coupling mechanism (3) are including a pair of coupling assembling (31), a pair of coupling assembling (31) are located the cloth both sides, coupling assembling (31) set up on frame (1), coupling assembling (31) are including fixed cover (311), slider (312) and mounting (313), fixed cover (311) set up on frame (1), a pair of first groove (314) have been seted up on the terminal surface that fixed cover (311) are close to each other, slider (312) horizontal insertion in first groove (314), a pair of square second groove (315) have been seted up on the terminal surface that slider (312) are close to each other, peg graft respectively in a pair of second groove (315) at the both ends of scraper (21), mounting (313) set up on fixed cover (311) and are used for locking the position of slider (312).

3. A rotary screen printing machine cloth feeding device according to claim 2, wherein: threaded holes (316) are formed in the fixing sleeve (311), threaded grooves (317) are formed in the side walls, close to the threaded holes (316), of the sliding blocks (312), the fixing pieces (313) comprise locking bolts (3131), and the locking bolts (3131) are in threaded connection in the threaded holes (316) and are in threaded connection with the threaded grooves (317).

4. A rotary screen printing machine cloth feeding device according to claim 2, wherein: the connecting mechanism (3) is vertically lifted and arranged on the frame (1), and a lifting assembly (4) for driving the connecting mechanism (3) to lift is arranged on the frame (1).

5. The cloth feeding device of a rotary screen printing machine according to claim 4, wherein: the lifting assembly (4) comprises two lifting cylinders (41), the lifting cylinders (41) are in one-to-one correspondence with the connecting assemblies (31) and are arranged on the frame (1), and the fixing sleeve (311) is arranged on a piston rod of the lifting cylinders (41).

6. A rotary screen printing machine cloth feeding device according to claim 1, wherein: the novel cloth feeding machine is characterized in that a second roller (12) is rotationally connected to the machine frame (1), the second roller (12) is located on one side, close to the cloth feeding end, of the first roller (11) and is parallel to the first roller (11), the second roller (12) is abutted to the lower surface of cloth, a tensioning mechanism (5) for tensioning the cloth is arranged on the machine frame (1), and the tensioning mechanism (5) is located between the first roller (11) and the second roller (12).

7. The cloth feeding device of a rotary screen printing machine according to claim 6, wherein: the tensioning mechanism (5) comprises a pair of driving assemblies (51) and tensioning rollers (52), the driving assemblies (51) are located on two sides of cloth, the driving assemblies (51) comprise supporting blocks (511), motors (512), screw rods (513) and connecting blocks (514), the supporting blocks (511) are arranged on a frame (1), movable grooves (54) are formed in the side walls, close to the cloth, of the supporting blocks (511), the screw rods (513) are rotationally connected in the movable grooves (54) and vertically arranged, the motors (512) are arranged on the supporting blocks (511) and are connected with the screw rods (513) in an output shaft mode, the connecting blocks (514) are connected onto the screw rods (513) in a sliding mode and are connected into the movable grooves (54) in a sliding mode, two ends of each tensioning roller (52) are rotationally connected onto the corresponding pair of connecting blocks (514) and abut against the upper surface of the cloth, and the tensioning rollers (52) are horizontally arranged and axially perpendicular to the conveying direction of the cloth.

8. A rotary screen printing machine cloth feeding device according to claim 1, wherein: the air extraction assembly (23) comprises an air extraction pipe (231), an air extraction pump (232) and a collecting box (233), wherein the collecting box (233) is arranged on the frame (1), the air extraction pipe (231) is arranged on the collecting box (233), one end, far away from the collecting box (233), of the air extraction pipe (231) is connected with the air suction Mao Zhao (22), and the air extraction pump (232) is arranged on the collecting box (233) and is communicated with a cavity of the collecting box (233).