Winding mechanism of die-cutting machine

Abstract

The utility model discloses a winding mechanism of a die-cutting machine, which comprises a bottom plate, roller seats are arranged on two sides of the bottom plate, a winding roller is arranged between the two roller seats, the tops of the roller seats on two sides are respectively provided with a roller shaft limiting structure, and each roller shaft limiting structure comprises an L-shaped limiting shoulder, a movable limiting lock plate and a lock plate lifting driving device. The limiting shoulder part is formed and arranged at the top of the shaft seat, the limiting shoulder part comprises a limiting surface and a guide surface, the limiting surface is vertically arranged, and an included angle a is formed between the guide surface and the limiting surface and is not smaller than 90 degrees; the movable limiting lock plate is movably assembled on the side, close to the guide face, of the limiting shoulder in the vertical direction, when the movable limiting lock plate ascends and protrudes out of the guide face, the limiting face, the guide face and the limiting lock plate define a roller shaft bayonet, and the winding roller is assembled in the roller shaft bayonet in a limited mode. And the locking plate lifting driving device is in transmission connection with the limiting locking plate. Compared with the prior art, the wind-up roll can be withdrawn quickly, and replacement is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of die-cutting equipment, and in particular to a winding mechanism of a die-cutting machine. Background Art

[0002] The die-cutting machine uses a die-cutting knife, steel knife, hardware mold or steel wire to apply a certain pressure through the stamping plate to cut the printed product or cardboard into a certain shape.

[0003] After the winding mechanism of the traditional die-cutting equipment is wound, the disassembly process of the winding roller is relatively complicated. For example, in the Chinese utility model patent with application number "CN202122750281.0" and patent name "A winding mechanism of a self-adhesive trademark die-cutting machine", the clamping device includes a moving column, a first bearing seat, a disc, a connecting plate, a rotating shaft, a moving plate, a moving bar and a fixed shaft. The lower end of the bottom plate is fixedly connected to the first bearing seat, the internal rotation of the first bearing seat is connected to the rotating shaft, the upper end of the rotating shaft is fixedly connected to the disc, and the upper end of the disc is fixedly connected to the fixed shaft The fixed shaft is slidably connected to the moving bar, the right end of the moving bar is fixedly connected to a moving plate, the upper end of the moving plate is fixedly connected to a connecting plate, the left end of the connecting plate is fixedly connected to the moving column at the right end. When working, the rotation of the rotating shaft drives the disc to rotate, and the rotation of the disc drives the fixed shaft to rotate. Under the action of the fixed shaft, the moving bar moves, the movement of the moving bar drives the moving plate to move, the movement of the moving plate drives the connecting plate to move, and the movement of the connecting plate drives the moving column at the right end to move. With the movement of the moving column, the moving column can clamp or release the winding roller.

[0004] After the winding roller is fully loaded, its own weight is so great that it is difficult to move. This winding mechanism that clamps or releases the winding roller by axial movement of the moving column only realizes the rapid tooling of the winding roller, and the problem of the difficulty in changing and transferring the winding roller is not solved. Utility Model Content

[0005] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A winding mechanism of a die-cutting machine comprises a bottom plate, roller seats are arranged on both sides of the bottom plate, a winding roller is arranged between the two roller seats, roller shaft limiting structures are respectively arranged on the tops of the roller seats on both sides, the roller shaft limiting structure comprises an L-shaped limiting shoulder, a movable limiting locking plate and a locking piece lifting and lowering driving device, the limiting shoulder is formed and arranged on the top of the shaft seat, the limiting shoulder comprises a limiting surface and a guiding surface, the limiting surface is vertically arranged, an angle a is formed between the guiding surface and the limiting surface, and the angle a is not less than 90 degrees; the movable limiting locking plate is movably assembled on a side of the limiting shoulder close to the guiding surface in the up and down directions, when the movable limiting locking plate rises and protrudes from the guiding surface, the limiting surface, the guiding surface and the limiting locking piece surround to form a roller shaft bayonet, and the winding roller is limitedly assembled on the roller shaft bayonet; the locking piece lifting and lowering driving device is transmission-connected to the limiting locking piece.

[0008] In a further technical solution, the roller seat is provided with a sliding assembly chamber, the top of the sliding assembly chamber is open and connected to the guide surface; the rear side of the roller seat is provided with a linkage opening, and the linkage opening is connected to the sliding assembly chamber; the side of the movable limit lock plate is formed with a strip-shaped tooth structure; the rear side of the roller seat is also formed with a gear assembly seat, and the first transmission gear and the second transmission gear are respectively installed on both sides of the gear assembly seat, and the first transmission gear and the second transmission gear are coaxially connected, and the tooth structure on the edge of the first transmission gear is embedded in the linkage opening and meshed with the movable limit lock plate; a lock plate lifting and lowering drive motor is fixed to the outside of the roller seat, and the output shaft of the lock plate lifting and lowering drive motor is equipped with a bevel gear, and the bevel gear is meshed with the second transmission gear.

[0009] In a further technical solution, a limiting inclined surface is formed on the top of the movable limiting locking plate close to the winding roller, and the limiting inclined surface is movably abutted against the roller shaft of the winding roller.

[0010] In a further technical solution, a rotary bearing is respectively sleeved on both ends of the roller shaft of the winding roller, and the rotary bearing is clamped in the roller shaft clamping port.

[0011] In a further technical solution, a roller seat on either side is provided with a winding and leveling structure, which includes a leveling drive cylinder, a leveling connector, a connecting rod and a first rotating connector, the leveling connector includes a locking nut, a concentric support rod and a second rotating connector welded in sequence, the locking nut and the second rotating connector are coaxially arranged, the number of concentric support rods is more than three, the concentric support rods are spaced apart along the circumferential direction, and the two ends of the concentric support rods are respectively welded to the locking nut and the second rotating connector; one end of the connecting rod is connected to the first rotating connector, and the other end is connected to the second rotating connector; the second rotating connector is fixedly connected to the piston rod of the leveling drive cylinder, the bottom of the leveling drive cylinder is fixedly connected to the roller seat, and the piston rod of the leveling drive cylinder is parallel to the roller axis of the winding roller.

[0012] In a further technical solution, a guide side disc is provided on both sides of the roller surface of the winding roller, and the inner side surface of the guide side disc is formed with a guide chamfer.

[0013] In a further technical solution, an end of the roller shaft of the winding roller away from the winding and leveling structure is connected to a winding drive device, the winding drive device includes a winding drive motor, an active chain disc and a passive chain disc, the winding drive motor is fixed to the bottom plate, the active chain disc is connected to the output shaft of the winding drive motor, a chain is wound between the active chain disc and the passive chain disc, a linkage clamping part is provided at the end of the roller shaft of the winding roller, and a plurality of axially arranged limit slots are provided on the outer surface of the linkage clamping part; a limiting sleeve is provided at the center position of the passive chain disc, and a plurality of limiting protrusions are formed on the inner side of the limiting sleeve, the passive chain disc is sleeved on the roller shaft of the winding roller through the limiting sleeve, and each limiting protrusion is respectively clamped in the corresponding limiting slot, and an external thread structure is also provided on the outer surface of the linkage clamping part, and the outer thread of the passive chain disc is equipped with a chain disc limiting nut, and the chain disc limiting nut acts on the passive chain disc.

[0014] A further technical solution also includes a tensioning mechanism, which includes tensioning supports respectively arranged on both sides of the base plate, a sliding fork is provided on the top of the tensioning support, the sliding fork extends in the vertical direction, and a tensioning roller assembly is rotatably assembled between the sliding forks on both sides; a tensioning drive cylinder is provided on the outer side of the tensioning support, and the piston rod of the tensioning drive cylinder is connected to the end of the tensioning roller assembly.

[0015] In a further technical solution, the tensioning roller assembly includes a center roller shaft, side plates respectively formed at both ends of the center roller shaft, and a rubber roller surface. The interior of the center roller shaft is hollowed out to form an air channel inside the shaft. The shaft surface of the center roller shaft is provided with a plurality of air holes, which are arranged at intervals along its axial direction. The outer surface of the center roller shaft is provided with a plurality of partitions at intervals. The two sides of the rubber roller surface are respectively connected to the corresponding side plates, and are surrounded and connected to each partition to form a plurality of air bag structures. Each air hole is respectively connected to the corresponding air bag structure. An air nozzle is connected to the end of the center roller shaft, and the air nozzle is connected to the air channel inside the shaft.

[0016] In a further technical solution, an airtight rotating connector is connected between the central roller and the air nozzle.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] The utility model provides a winding mechanism of a touch-cutting machine, which realizes quick disassembly and quick installation of the winding roller by arranging quick-installation structures at both ends of the winding roller, thereby improving the replacement speed; after the winding roller is unlocked, it can be withdrawn along the guide surface, which is convenient for taking out with the help of tools such as forklifts, thereby improving the usability of the equipment; the movable limit lock plate is driven to rise and fall by the transmission structure of the gear rack, which can ensure its pressure resistance and the stability of the locking assembly of the roller shaft; the winding roller is driven to be leveled in the axial direction by the leveling mechanism driven by the side hydraulic cylinder, which has strong stability and good leveling accuracy; in addition to being able to adjust the height of the tensioning roller assembly by the tensioning drive cylinders on both sides to achieve the adjustment of the tensioning degree, the air bag structure can also be inflated by an external air supply device through an air nozzle, thereby more delicately controlling the outer diameter of the tensioning roller assembly and further improving the tensioning stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of another viewing angle of the utility model;

[0021] Figure 3 yes Figure 2 The enlarged view of A in FIG.

[0022] Figure 4 It is a cross-sectional view of the tensioning roller assembly in the utility model. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4 ,like Figures 1 to 4As shown, the utility model provides a winding mechanism of a die-cutting machine, including a bottom plate 1, roller seats 021 are arranged on both sides of the bottom plate 1, a winding roller 2 is arranged between the two roller seats 021, and roller shaft limiting structures are respectively arranged on the tops of the roller seats 021 on both sides, and the roller shaft limiting structures include an L-shaped limiting shoulder, a movable limiting locking plate 022 and a locking plate lifting and lowering driving device, the limiting shoulder is formed and arranged on the top of the shaft seat, the limiting shoulder includes a limiting surface and a guiding surface, the limiting surface is vertically arranged, and the guiding surface is perpendicular to the guide surface. An angle a is formed between the limiting surfaces, and the angle a is not less than 90 degrees. In the present embodiment, an angle a is formed between the guiding surface and the limiting surface, and the angle a is 90 degrees. The movable limiting lock plate 022 is movably assembled on the side of the limiting shoulder close to the guiding surface along the up and down directions. When the movable limiting lock plate 022 rises and protrudes from the guiding surface, the limiting surface, the guiding surface and the limiting lock plate surround and form a roller shaft bayonet, and the winding roller 2 is limitedly assembled on the roller shaft bayonet. The locking plate lifting and lowering drive device is transmission-connected to the limiting lock plate.

[0025] By arranging quick-installation structures at both ends of the winding roller 2, the winding roller 2 can be quickly disassembled and installed, thereby improving the replacement speed. After the winding roller 2 is unlocked, it can be withdrawn along the guide surface, which is convenient for removal with the help of tools such as a forklift, thereby improving the usability of the equipment.

[0026] Specifically, the roller seat 021 is provided with a sliding assembly chamber, the top of the sliding assembly chamber is open and connected to the guide surface; the rear side of the roller seat 021 is provided with a linkage opening 023, and the linkage opening 023 is connected to the sliding assembly chamber; the side of the movable limit lock plate 022 is formed with a strip-shaped tooth structure; the rear side of the roller seat 021 is also formed with a gear assembly seat 025, and the two sides of the gear assembly seat 025 are respectively equipped with a first transmission gear 024 and a second transmission gear 026, the first transmission gear 024 and the second transmission gear 026 are coaxially connected, and the tooth structure on the edge of the first transmission gear 024 is embedded in the linkage opening 023 and meshed with the movable limit lock plate 022; a lock plate lifting and lowering drive motor 028 is fixed to the outer side of the roller seat 021, and the output shaft of the lock plate lifting and lowering drive motor 028 is equipped with a bevel gear 027, and the bevel gear 027 is meshed with the second transmission gear 026.

[0027] The movable limit lock plate 022 is driven up and down by the gear rack transmission structure, which can ensure its pressure resistance and the stability of the locking assembly of the roller shaft.

[0028] Specifically, a limiting inclined surface is formed on the top of the movable limiting locking plate 022 close to the winding roller 2 , and the limiting inclined surface is movably abutted against the roller shaft of the winding roller 2 .

[0029] Specifically, two ends of the roller shaft of the winding roller 2 are respectively sleeved with a rotary bearing, and the rotary bearing is clamped in the roller shaft clamping port.

[0030] Specifically, the roller seat 021 on either side is provided with a winding and leveling structure, which includes a leveling drive cylinder 28, a leveling connector, a connecting rod 26 and a first rotating connector 27. The leveling connector includes a locking nut 251, a concentric support rod 252 and a second rotating connector 253 which are welded in sequence. The locking nut 251 and the second rotating connector 253 are coaxially arranged. The number of concentric support rods 252 is more than three, and the concentric support rods 252 are spaced apart in the circumferential direction. The two ends of the concentric support rods 252 are respectively welded to the locking nut 251 and the second rotating connector 253; one end of the connecting rod 26 is connected to the first rotating connector 27, and the other end is connected to the second rotating connector 253; the second rotating connector 253 is fixedly connected to the piston rod of the leveling drive cylinder 28, the bottom of the leveling drive cylinder 28 is fixedly connected to the roller seat 021, and the piston rod of the leveling drive cylinder 28 is parallel to the roller axis of the winding roller 2.

[0031] The leveling mechanism is driven by the leveling drive cylinder 28 on the side to level the winding roller in the axial direction, which has strong stability and good leveling accuracy.

[0032] Specifically, a guide side disc 21 is respectively provided on both sides of the roller surface of the winding roller 2 , and a guide chamfer is formed on the inner side surface of the guide side disc 21 .

[0033] Specifically, the roller shaft of the winding roller 2 is connected to the end away from the winding and leveling structure with a winding drive device, and the winding drive device includes a winding drive motor 24, an active chain disc 23 and a passive chain disc 22. The winding drive motor 24 is fixed to the bottom plate 1, and the active chain disc 23 is connected to the output shaft of the winding drive motor 24. A chain is wound between the active chain disc 23 and the passive chain disc 22. A linkage clamping part is provided at the end of the roller shaft of the winding roller 2, and a plurality of axially arranged limit slots are provided on the outer surface of the linkage clamping part; a limit sleeve is provided at the center position of the passive chain disc 22, and a plurality of limit protrusions are formed on the inner side of the limit sleeve. The passive chain disc 22 is sleeved on the roller shaft of the winding roller 2 through the limit sleeve, and each limit protrusion is respectively clamped in the corresponding limit slot. An external thread structure is also provided on the outer surface of the linkage clamping part, and a chain disc limit nut is assembled on the outer thread of the passive chain disc 22, and the chain disc limit nut acts on the passive chain disc 22.

[0034] Specifically, it also includes a tensioning mechanism, which includes a tensioning support 031 respectively arranged on both sides of the base plate 1, a sliding fork 032 is provided on the top of the tensioning support 031, the sliding fork 032 is extended in the vertical direction, and a tensioning roller assembly 3 is rotatably assembled between the sliding forks 032 on both sides; a tensioning driving cylinder 033 is provided on the outer side of the tensioning support 031, and the piston rod of the tensioning driving cylinder 033 is connected to the end of the tensioning roller assembly 3.

[0035] Specifically, the tensioning roller assembly 3 includes a central roller shaft 3001, side plates 3004 respectively formed at both ends of the central roller shaft 3001, and a rubber roller surface 3005. The interior of the central roller shaft 3001 is hollowed out to form an air passage 3010 in the shaft. The shaft surface of the central roller shaft 3001 is provided with a plurality of air holes 3011, and the air holes 3011 are arranged at intervals along its axial direction. The outer surface of the central roller shaft 3001 is provided with a plurality of partitions 3006 at intervals. Both sides of the rubber roller surface 3005 are respectively connected to the corresponding side plates 3004, and are surrounded and connected to each partition 3006 to form a plurality of air bag structures 3007. Each air hole 3011 is respectively connected to the corresponding air bag structure 3007. The end of the central roller shaft 3001 is connected to an air nozzle 3002, and the air nozzle 3002 is connected to the air passage 3010 in the shaft.

[0036] During the tensioning process, in addition to adjusting the height of the tensioning roller assembly 3 through the tensioning drive cylinder 033 on both sides to adjust the tensioning degree, the air bag structure 3007 can also be inflated through the air supply device externally connected to the air nozzle 3002, thereby more delicately controlling the outer diameter of the tensioning roller assembly 3 and further improving the tensioning stability.

[0037] Specifically, an airtight rotating connection 3003 is connected between the central roller 3001 and the air nozzle 3002 .

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A winding mechanism of a die-cutting machine, comprising a bottom plate (1), roller seats (021) being arranged on both sides of the bottom plate (1), and a winding roller (2) being arranged between the two roller seats (021), characterized in that: A roller shaft limiting structure is respectively provided on the top of the roller seats (021) on both sides, and the roller shaft limiting structure comprises an L-shaped limiting shoulder, a movable limiting locking plate (022) and a locking plate lifting and lowering driving device. The limiting shoulder is formed and arranged on the top of the shaft seat, and the limiting shoulder comprises a limiting surface and a guiding surface. The limiting surface is vertically arranged, and an angle a is formed between the guiding surface and the limiting surface, and the angle a is not less than 90 degrees; the movable limiting locking plate (022) is movably assembled on a side of the limiting shoulder close to the guiding surface in the up-down direction, and when the movable limiting locking plate (022) rises and protrudes from the guiding surface, the limiting surface, the guiding surface and the limiting locking plate surround to form a roller shaft snap-in, and the winding roller (2) is limitedly assembled on the roller shaft snap-in; the locking plate lifting and lowering driving device is transmission-connected to the limiting locking plate.

2. The winding mechanism of the die-cutting machine according to claim 1, characterized in that: The roller seat (021) is provided with a sliding assembly chamber, the top of which is open and connected to the guide surface; the rear side of the roller seat (021) is provided with a linkage opening (023), the linkage opening (023) being connected to the sliding assembly chamber; the side of the movable limit lock plate (022) is formed with a strip-shaped tooth structure; the rear side of the roller seat (021) is also formed with a gear assembly seat (025), and the first transmission gear (024) and the second transmission gear are respectively mounted on both sides of the gear assembly seat (025). (026), the first transmission gear (024) and the second transmission gear (026) are coaxially connected, the tooth structure on the edge of the first transmission gear (024) is embedded in the linkage opening (023) and meshed with the movable limit lock plate (022); a locking plate lifting and lowering drive motor (028) is fixed on the outer side of the roller seat (021), and the output shaft of the locking plate lifting and lowering drive motor (028) is equipped with a bevel gear (027), and the bevel gear (027) is meshed with the second transmission gear (026).

3. The winding mechanism of the die-cutting machine according to claim 2, characterized in that: A limiting inclined surface is formed on the top of the movable limiting locking plate (022) and close to one side of the winding roller (2), and the limiting inclined surface is movably abutted against the roller shaft of the winding roller (2).

4. The winding mechanism of the die-cutting machine according to claim 3, characterized in that: A rotary bearing is respectively sleeved on both ends of the roller shaft of the winding roller (2), and the rotary bearing is clamped in the roller shaft clamping port.

5. The winding mechanism of the die-cutting machine according to claim 4, characterized in that: The roller seat (021) on either side is provided with a winding and leveling structure, the winding and leveling structure comprising a leveling drive cylinder (28), a leveling connection piece, a connecting rod (26) and a first rotating connection head (27), the leveling connection piece comprising a locking nut (251), a concentric support rod (252) and a second rotating connection head (253) which are welded in sequence, the locking nut (251) and the second rotating connection head (253) being coaxially arranged, the number of the concentric support rods (252) being arranged is more than three, and the concentric support rods (252) are arranged in a plurality of directions. ) are spaced apart in the circumferential direction, and the two ends of the concentric support rod (252) are respectively welded to the locking nut (251) and the second rotating connector (253); one end of the connecting rod (26) is connected to the first rotating connector (27), and the other end is connected to the second rotating connector (253); the second rotating connector (253) is fixedly connected to the piston rod of the leveling drive cylinder (28), the bottom of the leveling drive cylinder (28) is fixedly connected to the roller seat (021), and the piston rod of the leveling drive cylinder (28) is parallel to the roller axis of the winding roller (2).

6. The winding mechanism of the die-cutting machine according to claim 5, characterized in that: A guide side disc (21) is provided on each side of the roller surface of the winding roller (2), and a guide chamfer is formed on the inner side surface of the guide side disc (21).

7. The winding mechanism of the die-cutting machine according to claim 6, characterized in that: The roller shaft of the winding roller (2) is connected to a winding drive device at one end away from the winding and leveling structure, the winding drive device comprising a winding drive motor (24), an active chain disc (23) and a passive chain disc (22), the winding drive motor (24) being fixed to the bottom plate (1), the active chain disc (23) being connected to the output shaft of the winding drive motor (24), a chain being wound between the active chain disc (23) and the passive chain disc (22), The end of the roller shaft of the winding roller (2) is provided with a linkage clamping portion, and the outer surface of the linkage clamping portion is provided with a plurality of axially arranged limit slots; a limit sleeve is provided at the center of the passive chain disc (22), and a plurality of limit protrusions are formed on the inner side of the limit sleeve; the passive chain disc (22) is sleeved on the roller shaft of the winding roller (2) through the limit sleeve, and each limit protrusion is respectively clamped in a corresponding limit slot. An external thread structure is also provided on the outer surface of the linkage clamping portion, and a chain disc limiting nut is assembled on the outer thread of the passive chain disc (22), and the chain disc limiting nut acts on the passive chain disc (22) in a limiting manner.

8. The winding mechanism of a die-cutting machine according to claim 1, characterized in that: It also includes a tensioning mechanism, which includes tensioning supports (031) respectively arranged on both sides of the base plate (1), a sliding fork (032) is provided on the top of the tensioning support (031), the sliding fork (032) is extended in the vertical direction, and a tensioning roller assembly (3) is rotatably assembled between the sliding forks (032) on both sides; a tensioning drive cylinder (033) is provided on the outer side of the tensioning support (031), and the piston rod of the tensioning drive cylinder (033) is connected to the end of the tensioning roller assembly (3).

9. The winding mechanism of the die-cutting machine according to claim 8, characterized in that: The tensioning roller assembly (3) comprises a central roller shaft (3001), side plates (3004) respectively formed at two ends of the central roller shaft (3001), and a rubber roller surface (3005); the interior of the central roller shaft (3001) is hollowed out to form an air passage (3010) in the shaft; the shaft surface of the central roller shaft (3001) is provided with a plurality of air holes (3011), the air holes (3011) are arranged at intervals along the axis direction thereof; the outer surface of the central roller shaft (3001) is provided with a plurality of partitions (3006) formed at intervals; the two sides of the rubber roller surface (3005) are respectively connected to the corresponding side plates (3004), and are surrounded and connected to each partition (3006) to form a plurality of air bag structures (3007); each air hole (3011) is respectively connected to a corresponding air bag structure (3007); An air nozzle (3002) is connected to the end of the central roller shaft (3001), and the air nozzle (3002) is connected to the air passage (3010) in the shaft.

10. The winding mechanism of the die-cutting machine according to claim 9, characterized in that: An airtight rotating connection (3003) is connected between the central roller shaft (3001) and the air receiving nozzle (3002).

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