A retractable cloth rolling roller

Abstract

A retractable cloth rolling roller relates to the field of cloth rolling equipment, including a retractable roller, a retractable mechanism and a fixing mechanism. Two retractable rollers are provided, including a plurality of rollers, a limiting section and a clamping section which are arranged in sequence and nested. The limiting section of the outer roller contacts the clamping section of the inner roller to limit the moving range of the inner roller, and a plurality of sealed spaces are formed between the limiting section of the outer roller and the clamping section of the inner roller. The retractable mechanism is arranged in the retractable roller to drive the retractable roller to extend and retract, and includes an air nozzle, an air pipe and a rotary joint. The air nozzle is arranged on the inner wall of the roller and connected to the sealed space. Through the two relatively arranged retractable rollers, after the cloth is rolled, they shrink to both sides, and a cloth roll without a roller shaft can be directly obtained, which saves the subsequent operation of drawing the rollers and improves the production efficiency. At the same time, the air nozzle is used to transport or extract gas in the sealed space to realize the extension and retraction of the retractable roller. The structure is simple. When the retractable roller is extended, it passes through the limiting section and the clamping section to prevent the inner roller from being separated from the outer roller.

Description

Technical Field

[0001] The utility model belongs to the field of cloth rolling equipment, in particular to a telescopic cloth rolling roller. Background Art

[0002] The cloth winding machine is a part of the circular knitting machine and is installed under the circular knitting machine. After the knitting machine finishes weaving, the cloth is wound up by the cloth winding machine. The cloth is wound up onto the roller by the cloth winding machine, and then the cloth is transported to the storage area and then transferred to other areas for processing.

[0003] Traditional cloth rolling equipment usually uses rollers to roll cloth. After the cloth is rolled, new rollers need to be continuously added to the cloth rolling equipment. The rollers will still exist during the subsequent transfer, use and processing of the cloth. After use, the rollers need to be recycled, which greatly increases the workload. At the same time, not only does it need to add rollers after each cloth rolling, it is time-consuming and labor-intensive, and the work efficiency is low, which needs to be improved. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art and provide a retractable cloth rolling roller.

[0005] The utility model adopts the following technical solutions:

[0006] A telescopic cloth rolling roller comprises a telescopic roller, a telescopic mechanism and a fixing mechanism. Two telescopic rollers are provided and arranged relatively along a coaxial line. The telescopic roller comprises a plurality of rollers which are nested in sequence, a limiting section which is provided at the front end of the roller and is concave inwardly shaped, and a clamping section which is provided at the end of the roller and is convex outwardly shaped. The limiting section of the outer roller contacts the clamping section of the inner roller to limit the moving range of the inner roller, and a plurality of sealed spaces are formed between the limiting section of the outer roller and the clamping section of the inner roller. The telescopic mechanism is provided in the telescopic roller to drive the telescopic roller to telescope, and comprises an air nozzle, an air pipe and a rotary joint. The air nozzle is provided on the inner wall of the roller and is connected to the sealed space. A plurality of air pipes are provided and are connected to the air nozzles one by one, and the other end extends to the end of the roller. The rotary joint is provided at the end of the outermost roller and is connected to the air pipe and an external air supply device at the same time. The fixing mechanism is provided at the innermost roller end of the telescopic roller to clamp the two telescopic rollers.

[0007] Preferably, the fixing mechanism includes a male joint and a female joint, which are respectively arranged at the ends of the telescopic rollers on both sides. The male joint is arranged at the innermost sleeve end of the telescopic roller on one side, and is shaped like a cone extending outward with a gradually decreasing diameter; the female joint is arranged at the innermost sleeve end of the telescopic roller on the other side, and is internally recessed with a groove that matches the shape of the male joint.

[0008] Preferably, the inner diameter of the limiting section is equal to the outer diameter of the clamping section in contact with it, the inner side of the limiting section is recessed inward to form a first annular groove, and the outer side of the clamping section is recessed inward to form a second annular groove, and sealing rings are arranged in the first annular groove and the second annular groove. The sealing rings are in contact with the wall of the roller and are located on both sides of the sealing space to seal the sealing space.

[0009] Preferably, the length of the roller is shortened from the inside to the outside, and a limiting ring is provided on the outer side of the roller. The outer diameter of the limiting ring is larger than the inner diameter of the outer roller to limit the moving range of the inner roller.

[0010] Preferably, a plurality of limiting columns are arranged on the limiting section, the limiting columns are arranged on the limiting section and face the inside of the roller, and the ends of the limiting columns can contact the clamping section to support the sealing space.

[0011] Preferably, the limiting posts are evenly distributed along the circumferential direction on the limiting sections, and a rubber sleeve is provided on the contact surface between the limiting posts and the clamping section.

[0012] Preferably, the inner diameter of the outer roller is larger than the outer diameter of the inner roller clamping section, and the inner diameter of the outer roller limiting section is larger than the diameter of the inner roller and smaller than the outer diameter of the inner roller clamping section.

[0013] Preferably, the limiting segment and the limiting ring on the roller located in the middle position are integrally formed, extending from the roller end to both sides, and only the limiting segment is formed on the outermost roller, and only the limiting ring is formed on the outermost roller.

[0014] Preferably, two air nozzles are provided and symmetrically arranged inside the roller.

[0015] From the above description of the utility model, it can be known that compared with the prior art, the utility model has the following beneficial effects: through the two relatively arranged telescopic rollers, after the cloth is rolled up, they are retracted to both sides, so that a cloth roll without a roller shaft can be directly obtained, which saves the subsequent operation of drawing the rollers and improves the production efficiency. At the same time, the air nozzle is used to transport or extract the gas in the sealed space to realize the extension and contraction of the telescopic roller. The structure is simple and space-saving. At the same time, the rotating joint is used to prevent the rotation of the cloth rolling roller from affecting the air pipe and the air nozzle, thereby improving the stability of the device. When the telescopic roller is extended, the limiting section and the clamping section are used to prevent the inner roller from being separated from the outer roller.

[0016] When the two telescopic rollers are extended, they are connected to the female joint through the male joint to ensure that the telescopic rollers can play the due supporting role when rolling the cloth;

[0017] By setting sealing rings on both sides of the sealed space, the air tightness of the sealed space is ensured, and the stability of the extension and shortening of the telescopic roller is ensured;

[0018] The limiting ring can limit the inner roller from excessively moving into the outer roller;

[0019] The limiting column is used to support the sealing space to prevent the sealing space from being too small after the limiting section and the clamping section are completely close together, making it difficult to ventilate through the air nozzle to shrink the telescopic roller;

[0020] A rubber sleeve is arranged on the contact surface of the limiting column and the clamping section to avoid wear caused by collision between the clamping section and the limiting column due to long-term expansion and contraction, thereby increasing the service life of the cloth winding roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure of the cloth rolling equipment in the specific implementation scheme is shown in FIG. Figure 1 ;

[0022] Figure 2 The structure of the cloth rolling equipment in the specific implementation scheme is shown in FIG. Figure 2 ;

[0023] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0024] Figure 4 It is a working schematic diagram of the guiding mechanism in the specific implementation scheme;

[0025] Figure 5 The working status of the equipment in the specific implementation plan Figure 1 ;

[0026] Figure 6 The working status of the equipment in the specific implementation plan Figure 2 ;

[0027] Figure 7 This is a schematic structural diagram of a telescopic roller of the utility model;

[0028] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0029] Fig. 9 This is a schematic diagram of the structure of another telescopic roller of the utility model;

[0030] Fig.10 for Fig. 9 A partial enlarged view of point C in the middle;

[0031] Fig.11 It is a structural schematic diagram of a guide plate in a specific implementation manner;

[0032] Fig.12 A structural cross-sectional view of the guide plate in the second embodiment of the present invention in a guiding state;

[0033] In the figure: 1 bracket, 11 slide, 2 cloth rolling roller, 21 telescopic roller, 211 roller, 212 limiting section, 213 clamping section, 214 sealing space, 215 first annular groove, 216 second annular groove, 217 sealing ring, 218 limiting ring, 219 limiting column, 22 telescopic mechanism, 221 air nozzle, 222 air pipe, 223 rotary joint, 23 fixing mechanism, 231 male joint, 232 female joint, 3 driving roller group, 4 lifting mechanism, 41 rodless cylinder, 42 connecting plate, 43 guide rod, 44 guide block, 5 feeding mechanism, 51 pushing rod, 52 extension rod, 53 second cylinder, 54 unwinding assembly, 541 cloth receiving track, 542 extension seat, 543 flip rod, 6 cutting mechanism, 61 slide rail, 62 cloth shearing machine, 7 guiding mechanism, 71 guide plate, 72 first cylinder, 73-letting hole. DETAILED DESCRIPTION

[0034] The present invention is further described below through specific implementation methods.

[0035] Embodiment 1:

[0036] Reference Figures 1 to 11 As shown, an automatically guided roller-free cloth winding device includes a bracket 1, a cloth winding roller 2, a driving roller group 3, a lifting mechanism 4, a rolling mechanism 5, a cutting mechanism 6, and a guiding mechanism 7.

[0037] The bracket 1 is symmetrically arranged on both sides of the cloth outlet.

[0038] The cloth rolling roller 2 comprises a telescopic roller 21, a telescopic mechanism 22 and a fixing mechanism 23. The cloth is wound around the cloth rolling roller 2 to form a cloth roll.

[0039] Two telescopic rollers 21 are provided, arranged oppositely along the coaxial line, and can be extended in opposite directions to a cloth rolling state in which they are butted against each other, or contracted in opposite directions to a rolling state. The telescopic roller 21 includes a plurality of rollers 211 arranged in sequence, a limiting section 212 formed inwardly concave at the front end of the roller 211, and a clamping section 213 formed outwardly protruding at the end of the roller, the limiting section 212 of the outer roller 211 contacts the clamping section 213 of the inner roller 211 to limit the moving range of the inner roller 211, and a plurality of sealed spaces 214 are formed between the limiting section 212 of the outer roller 211 and the clamping section 213 of the inner roller 211.

[0040] Specifically, the inner diameter of the limiting section 212 is equal to the outer diameter of the clamping section 213 in contact with it, the inner side of the limiting section 212 is recessed inward to form a first annular groove 215, and the outer side of the clamping section 213 is recessed inward to form a second annular groove 216. Sealing rings 217 are arranged in the first annular groove 215 and the second annular groove 216. The sealing rings 217 are in contact with the wall of the roller 211 and are located on both sides of the sealing space 214 to seal the sealing space 214. By arranging the sealing rings 217 on both sides of the sealing space 214, the airtightness of the sealing space 214 is ensured, and the stability of the extension and shortening of the telescopic roller 21 is ensured.

[0041] Furthermore, the length of the roller 211 is shortened from the inside to the outside, and a limiting ring 218 is provided on the outer surface of the roller 211. The outer diameter of the limiting ring 218 is larger than the inner diameter of the outer roller 211 to limit the moving range of the inner roller 211. The inner diameter of the outer roller 211 is larger than the outer diameter of the clamping section 213 of the inner roller 211. The inner diameter of the limiting section 212 of the outer roller 211 is larger than the diameter of the inner roller 211 and smaller than the outer diameter of the clamping section 213 of the inner roller 211, so as to limit the two-way moving range of the roller 211 and prevent the inner roller 211 from being separated from or excessively extending into the outer roller 211. The limiting section 212 on the roller 211 at the middle position is integrally formed with the limiting ring 218, extending from the end of the roller 211 to both sides, and only the limiting section 212 and the limiting ring 218 are formed on the outermost roller 211.

[0042] Preferably, the limiting section 212 is provided with a plurality of limiting posts 219, which are evenly distributed along the circumference and arranged on the limiting section 212 and facing the inside of the roller 211. A rubber sleeve having a buffering effect is provided on the contact surface between the limiting posts 219 and the clamping section 213 to improve the service life. The end of the limiting post 219 can contact the clamping section 213 to support the sealing space 214.

[0043] The telescopic mechanism 22 is arranged in the telescopic roller 21 to drive the telescopic roller 21 to extend and retract, and includes an air nozzle 221, an air pipe 222 and a rotary joint 223. Two air nozzles 221 are arranged, which are symmetrically distributed on the inner wall of the roller 211 and connected to the sealed space 214; the air pipe 222 is connected to the air nozzle 221 one by one, and the other end extends to the end of the roller 211; the rotary joint 223 is arranged at the end of the outermost roller 211 and is connected to the air pipe 222 and the external air supply device. Among them, since the limit column 219 is used to support the sealed space 214, it is prevented that the sealed space 214 is too small after the limit section 212 and the clamping section 213 are completely close to each other, so that it is difficult to ventilate the telescopic roller 21 through the air nozzle 221 to shrink the telescopic roller 21, thereby improving the working stability of the telescopic roller 21. Specifically, the rotary joint 223 is a common rotary air circuit joint in the prior art, which can transmit air circuits while rotating. It is not the focus of this application, and its structure and selection are not further described here. At the same time, the arrangement of the air pipe is adapted to local conditions and arranged according to the different lengths of the telescopic roller 21 and the roller 211. In the roll-feeding state, the air pipe 221 is folded and stored inside the roller 211. The length of the roller 211 is shortened from the outside to the inside to prevent the air nozzle from being blocked by the inner roller 211 in the roll-feeding state.

[0044] The fixing mechanism 23 is arranged at the end of the innermost roller 211 of the telescopic roller 21 to clamp the two telescopic rollers 21. The fixing mechanism 23 includes a male joint 231 and a female joint 232, which are respectively arranged at the ends of the telescopic rollers 21 on both sides. The male joint 231 is arranged at the innermost sleeve end of the telescopic roller 21 on one side, and is in the shape of a truncated cone extending outward and gradually reducing in diameter; the female joint 232 is arranged at the innermost sleeve end of the telescopic roller 21 on the other side, and is concavely formed with a groove matching the shape of the male joint 231. When the two telescopic rollers 21 are extended, they are connected to the female joint 232 through the male joint 231, so as to ensure that the telescopic rollers 21 can play a due supporting role when rolling the cloth.

[0045] The driving roller group 3 is arranged below the cloth rolling roller 2. The cloth passes between the cloth rolling roller 2 and the driving roller group 3 and is driven by the driving roller group 3 to move forward. The arrangement direction of the driving roller group 3 is slightly inclined downward along the cloth roll output direction, and the inclination angle is not greater than 15°. It can not only play the role of placing the cloth roll, but also facilitate the pushing out of the cloth roll after winding.

[0046] The lifting mechanism 4 is arranged on the bracket 1 and connected to the cloth rolling roller 2 and drives the two telescopic rollers 21 to rise and fall synchronously, and includes a rodless cylinder 41, a connecting plate 42, a guide rod 43 and a guide block 44. The rodless cylinder 41 is arranged on the bracket 1 and is parallel to the lifting direction of the cloth rolling roller 2; the connecting plate 42 is connected between the rodless cylinder 41 and the cloth rolling roller 2 to drive the cloth rolling roller 2 to rise and fall; the guide rod 43 is arranged on the bracket 1 and is parallel to the rodless cylinder 41; the guide block 44 is slidably arranged on the guide rod 43 and connected to the connecting plate 42. Specifically, the rodless cylinder 41 and the guide rod 43 are respectively located on both sides of the cloth rolling roller 2 to ensure that the forces on both sides of the connecting plate 42 are uniform. If the forces on the same side are unbalanced, it is easy to increase the friction between the guide block 44 and the guide rod 43, making it difficult to lift and lower the cloth rolling roller 2.

[0047] The roll-feeding mechanism 5 pushes the cloth roll to one side and moves out of the device. The roll-feeding mechanism 5 includes a push rod 51, an extension rod 52, a second cylinder 53 and an unwinding assembly 54. The push rod 51 can be flipped on the bracket 1 and can be flipped from the side away from the driving roller group 3 to the side close to the driving roller group 3; the extension rod 52 is formed at the end of the push rod 51 and extends in the direction close to the cloth roll. The extension rod 52 can be flipped to the top of the driving roller group 3 with the push rod 51 to push the cloth roll on the driving roller group 3 to move forward; the second cylinder 53 is set on the bracket 1 to drive the push rod 51 to rotate; the unwinding assembly 54 can receive the cloth roll pushed out by the push rod 51, including The cloth receiving track 541, the extension seat 542, the flip rod 543 and the driving member, the cloth receiving track 541 is extended along the cloth roll output direction, and the top surface of the cloth receiving track 541 is an inclined surface inclined forward along the output direction; the extension seat 542 is set in the cloth receiving track 541, and can move back and forth along the cloth roll moving direction; the flip rod 543 is rotatably set at the front end of the extension seat 542, and can be rotated from a vertical state that blocks the cloth roll from moving forward to a horizontal state; the driving member is respectively connected to the extension seat 542 and the flip rod 543 and drives the extension seat 542 to extend and drives the flip rod 543 to rotate. Specifically, a slide groove 11 is formed on the bracket 1, and the slide groove 11 extends along the motion track of the end of the flip rod 543. The end of the flip rod 543 extends into the slide groove 11 and moves in the slide groove 11. The slide groove 11 provides support for the flip rod 543 to improve the structural strength.

[0048] The cutting mechanism 6 is arranged at the outlet of the equipment to cut the cloth. The cutting mechanism 6 includes a slide rail 61 and a cloth cutter 62. The slide rail 61 is arranged on the cloth receiving track 541 perpendicular to the moving direction of the cloth roll; the cloth cutter 62 is movably arranged on the slide rail 61 for cutting the cloth. The cloth cutter 62 is a common cloth cutting device in the prior art, which is not the focus of this application, and its structure and selection are not further described here.

[0049] The guide mechanism 7 includes a guide plate 71 and a first cylinder 72. The guide plate 71 is located between the cutting mechanism 6 and the driving roller group 3, and can be flipped on the bracket 1. It can be flipped from a guiding state close to the cloth rolling roller 2 and the driving roller group 3 to a storage state away from the cloth rolling roller 2 and the driving roller group 3. The guide plate 71 rotates from the storage state to the guiding state to flip the cloth cut by the cutting mechanism 6 and transport it to the cloth rolling roller 2 and rewind it on the cloth rolling roller 2; the first cylinder 72 is connected to the guide plate 71 to drive it to rotate. Through the rotation of the guide plate 71, the cloth moves forward through the driving roller group 3 and moves upward by the guide plate 71 and is automatically wound on the cloth rolling roller 2, which improves the automation of the cloth rolling device, reduces the workload, and improves production efficiency.

[0050] Specifically, the guide plate 71 is an arc-shaped plate adapted to the cloth winding roller 2. The guide plate 71 is in the storage state and is mounted on the cloth receiving track 541 between the slide rail 61 and the driving roller group 3. A clearance hole 73 corresponding to the cloth receiving track 541 and through which the cloth receiving track 541 can pass is formed on the guide plate 71. The guide plate 71 is in the shape of an arc-shaped plate and is located between the slide rail 61 and the driving roller group 3. It can drive the cut cloth to flip upward and rewind on the cloth winding roller 2. In the storage state, in order to prevent the cloth roll from falling on the guide plate 71 and being stuck by the guide plate 71 during feeding, resulting in feeding failure, the clearance hole 73 for the cloth receiving track 541 to pass through is set on the guide plate 71, so that the guide plate 71 can be rotated to the bottom of the cloth receiving track 541 without affecting the feeding.

[0051] A cloth rolling method, involving the above-mentioned automatically guided roller-free cloth rolling device, comprising:

[0052] Step 1: Before rolling the cloth, drive the two telescopic rollers 21 to extend to the cloth rolling state where the male joint 231 and the female joint 232 are connected to each other, the lifting mechanism 4 drives the cloth rolling roller 2 to descend to the bottom and close to the driving roller group 3, and the first cylinder 72 drives the guide plate 71 to rotate to the storage state;

[0053] Step 2: The cloth falls from the cloth outlet above the equipment, and the cloth is guided to pass between the cloth winding roller 2 and the driving roller group 3. The driving roller group 3 starts to work and drives the cloth to move forward, and the cloth moves forward to above the guide plate 71;

[0054] Step 3: Drive the first cylinder 72 to drive the guide plate 71 to flip to the cloth rolling state, and the cloth is flipped along with the guide plate 71 and wound on the cloth rolling roller 2. After the cloth roll is completely wound on the cloth rolling roller 2, drive the first cylinder 72 to reset and rotate the first guide plate 71 to the storage state;

[0055] Step 4: the lifting mechanism 4 drives the cloth rolling roller 2 to rise as the diameter of the cloth roll on the cloth rolling roller 2 increases, and controls the driving roller group 3 to stop after the cloth rolling is completed, and controls the telescopic roller 21 to retract to both sides until the telescopic roller 21 is separated from the cloth roll feeding state, so as to obtain a roller-free cloth roll placed on the driving roller group 3;

[0056] Step 5: The second cylinder 53 drives the push rod 51 to rotate and approach the driving roller group 3. The extension rod 52 contacts and pushes the rollerless cloth roll on the driving roller group 3 to move forward and enter the cloth receiving track 541 during the rotation of the push rod 51. At this time, the unwound cloth moves forward to the top of the slide rail 61 with the rollerless cloth roll. After the cloth shear 62 moves on the slide rail 61 to cut the cloth, the extension seat 542 is driven to extend and the flip rod 543 is controlled to rotate from a vertical state to a horizontal state to output the rollerless cloth roll outward.

[0057] Step 6: Repeat steps 3 to 5 until the fabric is completely rolled up.

[0058] Embodiment 2:

[0059] like Fig.12 As shown, the difference between this embodiment and the first embodiment is that a protrusion matching the surface of the cloth rolling roller 2 is formed on the side of the guide plate 71 close to the cloth rolling roller 2, and the thickness of the protrusion gradually increases from both sides inward to match the diameter of the cloth rolling roller 2. Since the telescopic roller 21 of the cloth rolling roller 2 is composed of a plurality of rollers 211 nested in sequence, the diameter of the cloth rolling roller 2 gradually decreases from both sides inward, and the guide plate matching its shape can better make the cloth close to the cloth rolling roller 2.

[0060] The present application uses a retractable cloth-winding roller 2, which contracts to both sides after the cloth rolling is completed to obtain a cloth roll without a roller shaft, and through the rotation of the guide plate 71, the woven cloth moves forward through the driving roller group 3 and moves upward by the guide plate 71 and is automatically wound around the cloth-winding roller 2, thereby improving the automation of the cloth rolling device, reducing the workload, eliminating the need for repeated addition of roller shafts and recycling of roller shafts, simplifying the production steps, and improving production efficiency.

[0061] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of implementation of the present utility model. That is, equivalent changes and modifications made according to the scope of the patent application of the present utility model and the contents of the specification should still fall within the scope covered by the patent of the present utility model.

Claims

1. A retractable cloth rolling roller, characterized in that: It includes a telescopic roller, a telescopic mechanism and a fixing mechanism. Two telescopic rollers are provided and arranged relatively along a coaxial line. The telescopic roller includes a plurality of rollers which are nested in sequence, a limiting section which is provided at the front end of the roller and is concave inwardly formed, and a clamping section which is provided at the end of the roller and is convex outwardly formed. The limiting section of the outer roller contacts the clamping section of the inner roller to limit the moving range of the inner roller, and a plurality of sealed spaces are formed between the limiting section of the outer roller and the clamping section of the inner roller. The telescopic mechanism is provided in the telescopic roller to drive the telescopic roller to extend and retract, and includes an air nozzle, an air pipe and a rotary joint. The air nozzle is provided on the inner wall of the roller and is connected to the sealed space. A plurality of air pipes are provided and are connected to the air nozzles one by one, and the other end extends to the end of the roller. The rotary joint is provided at the end of the outermost roller and is connected to the air pipe and is connected to an external air supply device at the same time. The fixing mechanism is provided at the end of the innermost roller of the telescopic roller to clamp the two telescopic rollers.

2. The retractable cloth rolling roller according to claim 1, characterized in that: The fixing mechanism includes a male joint and a female joint, which are respectively arranged at the ends of the telescopic rollers on both sides. The male joint is arranged at the innermost sleeve end of the telescopic roller on one side, and is shaped like a frustum extending outward with a gradually decreasing diameter; the female joint is arranged at the innermost sleeve end of the telescopic roller on the other side, and is concavely formed with a groove matching the shape of the male joint.

3. The retractable cloth rolling roller according to claim 1, characterized in that: The inner diameter of the limiting section is equal to the outer diameter of the clamping section in contact with it, the inner side of the limiting section is recessed inward to form a first annular groove, and the outer side of the clamping section is recessed inward to form a second annular groove, and sealing rings are arranged in the first annular groove and the second annular groove, and the sealing rings are in contact with the wall of the roller and are located on both sides of the sealing space to seal the sealing space.

4. The retractable cloth rolling roller according to claim 1, characterized in that: The length of the roller is shortened from the inside to the outside, and a limiting ring is arranged on the outer side of the roller. The outer diameter of the limiting ring is larger than the inner diameter of the outer roller to limit the moving range of the inner roller.

5. The retractable cloth rolling roller according to claim 1, characterized in that: The limiting section is provided with a plurality of limiting columns, which are arranged on the limiting section and face the inside of the roller, and the ends of the limiting columns can contact the clamping section to support the sealing space.

6. The retractable cloth rolling roller according to claim 5, characterized in that: The limiting posts are evenly distributed on the limiting sections along the circumferential direction, and a rubber sleeve is arranged on the contact surface between the limiting posts and the clamping sections.

7. The retractable cloth rolling roller according to claim 4, characterized in that: The inner diameter of the outer roller is larger than the outer diameter of the inner roller clamping section, and the inner diameter of the outer roller limiting section is larger than the diameter of the inner roller and smaller than the outer diameter of the inner roller clamping section.

8. The retractable cloth rolling roller according to claim 7, characterized in that: The limiting section and the limiting ring on the roller located in the middle position are integrally formed, extending from the ends of the roller to both sides, and only the limiting section and the limiting ring are formed on the outermost roller.

9. The retractable cloth rolling roller according to claim 1, characterized in that: There are two air nozzles, which are symmetrically arranged inside the roller.

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