A transfer printing device suitable for small-bore cups

Abstract

The application discloses a transfer printing device suitable for small-caliber cup bodies and relates to the technical field of cup body transfer printing. The transfer printing device suitable for small-caliber cup bodies comprises a seat body, the seat body is rotationally connected with adjacently arranged first and second bearing rollers, a placing area is formed between the first and second bearing rollers, one side of the seat body is provided with a driving mechanism connected to the first and second bearing rollers, and the driving mechanism can drive the first and second bearing rollers to rotate in the same direction; and the transfer printing device further comprises a lifting driving element, and the lifting driving element is connected with an elastic pressing mechanism located above the placing area. The application is convenient for transfer printing of small-caliber cup bodies with different diameters.

Description

Technical Field

[0001] This application relates to the technical field of transfer decals on cups, and in particular to a transfer decal device suitable for small-diameter cups. Background Technology

[0002] In the decoration of the circumferential outer wall of a glass, transfer decals are the mainstream technique. This typically involves first applying a transfer decal with images and text to the outer wall of the glass, and then applying external pressure to transfer the decal image stably onto the glass surface. To achieve a complete circumferential transfer, the glass must rotate steadily and uniformly during the pressure process to ensure the image is even, clear, and free of misalignment defects.

[0003] Existing transfer decal equipment generally adopts a central inner shaft drive structure, which drives the cup body to rotate through a rotating shaft that extends into the cup body, and completes the decal transfer in conjunction with the pressure roller.

[0004] The aforementioned structure is poorly suited for small-diameter cups. Due to the narrow inner diameter of the bottle mouth, the supporting shaft cannot extend into the cup body, thus failing to form a central support and rotational drive. This results in the cup body being unable to rotate stably during transfer, easily causing uneven rotation speed and slippage, leading to misalignment and blurring of the transferred pattern, thus affecting the product's decorative quality. Furthermore, the support and clamping mechanisms of traditional equipment are mostly of fixed specifications. For small-diameter cups of different diameters, it is necessary to frequently change special clamps, making the adjustment process cumbersome and inefficient, resulting in poor equipment versatility and making it difficult to meet the needs of continuous, high-efficiency production of multiple specifications of small-diameter cups. Summary of the Invention

[0005] To facilitate the transfer and decal application of small-diameter cups of different diameters, this application provides a transfer and decal application device suitable for small-diameter cups.

[0006] The transfer decal device for small-diameter cups provided in this application adopts the following technical solution: A transfer decal device suitable for small-diameter cups includes a base, on which a first support roller and a second support roller are rotatably connected. A placement area is formed between the first support roller and the second support roller. A drive mechanism connected to the first support roller and the second support roller is provided on one side of the base. The drive mechanism can drive the first support roller and the second support roller to rotate in the same direction. It also includes a lifting drive unit, which is connected to an elastic pressing mechanism located above the placement area.

[0007] By adopting the above technical solution, a small-diameter cup with a sticker can be placed in the placement area between the first and second support rollers. The drive mechanism can drive the first and second support rollers to rotate in the same direction. With the cooperation of the drive lifting mechanism moving to press the outer wall of the small-diameter cup, the first and second support rollers will drive the cup to rotate stably. While the cup rotates, the transfer of the text and images on the sticker can be completed. The elastic pressing mechanism applies elastic pressure to the outer wall of the cup, which can also make the sticker adhere tightly to the cup, ensuring the transfer effect. In addition, cups of different diameters can be placed in the placement area to be supported by the first and second support rollers, and the elastic pressing mechanism can also adapt to pressing cups of different diameters.

[0008] Preferably, the driving mechanism includes a driving component connected to a first transmission gear, the first bearing roller connected to a second transmission gear, and the first transmission gear meshing with the second transmission gear; the first bearing roller is also connected to a first synchronous pulley, the second bearing roller is connected to a second synchronous pulley, and the first and second synchronous pulleys are jointly connected to a synchronous belt.

[0009] By adopting the above technical solution, it is possible to realize the power transmission of the driving component to the first bearing roller and to realize the synchronous rotation of the first bearing roller and the second bearing roller in the same direction.

[0010] Preferably, the elastic pressing mechanism includes a frame connected to the lifting drive component, the frame having a connecting hole, a sliding column slidably connected to the connecting hole, a pressing roller rotatably connected to the sliding column and arranged in the same direction as the first bearing roller, an elastic element sleeved on the sliding column, and the two ends of the elastic element being connected to the frame and the sliding column respectively.

[0011] By adopting the above technical solution, the elastic pressing mechanism is mainly used to adapt to the outer wall of the straight cup. When the lifting drive moves the frame down, the pressing roller can contact the outer wall of the straight cup, the sliding column can slide along the connecting hole, and the elastic element can provide elastic pressure to keep the pressing roller always in contact with the outer wall of the straight cup. The cooperation between the sliding column and the elastic element can buffer the pressure and avoid damaging the cup, while ensuring that the transfer sticker is evenly pressed.

[0012] Preferably, the elastic pressing mechanism includes a mounting frame connected to the lifting drive component, the mounting frame having a plurality of vertically movable mounting seats, and the mounting frame having a locking component capable of locking the plurality of mounting seats; each of the mounting seats is equipped with an elastic pressing component.

[0013] By adopting the above technical solution, the elastic pressing mechanism can press cups with different diameters. Multiple mounting seats can move independently vertically to adapt to the outer diameter changes at different positions of the cup as much as possible. The locking component can lock the position of the mounting seats to ensure pressing stability.

[0014] Preferably, the mounting base includes a column, the mounting frame has a vertically arranged receiving hole, the column is slidably connected to the receiving hole, the column is fitted with a first elastic member, and the two ends of the first elastic member are respectively connected to the column and the mounting frame; the locking assembly includes an expansion locking member, the expansion locking member is installed on the mounting frame, and the expansion locking member can expand to lock the column or unlock it.

[0015] By adopting the above technical solution, the column can slide vertically along the receiving hole, and the first elastic element can provide the column with a reset and buffering force to adapt to the height change of the outer wall of the cup; the expansion locking element can hug the column to lock when it expands and can release the lock when it contracts. This design can facilitate the quick adjustment of the mounting height to adapt to the wall surface of different diameters on the cup.

[0016] Preferably, the elastic pressing assembly includes a force-bearing component slidably connected to the mounting base, the force-bearing component having a second elastic component, the two ends of the second elastic component being respectively connected to the force-bearing component and the mounting base; a connecting shaft is connected to the mounting base, the connecting shaft is rotatably connected to a mounting arm, the mounting arm is rotatably connected to a pressing wheel, and the mounting arm has a force-applying component; when the pressing wheel presses the cup body under force, the mounting arm rotates to cause the force-applying component to press the force-bearing component, and the second elastic component is compressed; the pressing wheel includes a tube rotatably connected to the mounting arm and an elastic wheel sleeve detachably connected to the tube.

[0017] By adopting the above technical solution, when the pressing wheel contacts the cup body, it will drive the mounting arm to rotate around the connecting shaft. The force-applying component can press the force-receiving component as the mounting arm rotates. The second elastic component is compressed to generate a reverse elastic force, so that the pressing wheel always adaptively fits the outer wall of the cup body, ensuring uniform pressure and improving the transfer quality.

[0018] For cups with different outer wall shapes, the elastic sleeves can be removed and replaced to achieve adaptive pressing of the outer wall of the cup.

[0019] Preferably, the force-bearing component includes a force-bearing plane, and the force-applying component includes an arcuate protrusion that contacts the force-bearing plane.

[0020] By adopting the above technical solution, the contact and cooperation between the arc protrusion and the force-bearing plane can reduce the frictional loss between the force-applying component and the force-bearing component.

[0021] Preferably, the mounting base is provided with a displacement detection element, which is used to detect the displacement of the force-bearing component, so as to obtain the pressing force of the pressing wheel on the cup body based on the displacement.

[0022] By adopting the above technical solution, the displacement detection component can detect the displacement of the force-bearing component in real time and thus accurately obtain the pressing force of the pressing wheel on the cup body. Based on the detection data, it can help adjust the pressing force to avoid excessive pressure damaging the cup body or insufficient pressure affecting the transfer effect.

[0023] In summary, the present invention has at least one of the following beneficial technical effects: 1. A small-diameter cup with a sticker can be placed in the placement area between the first and second support rollers. The drive mechanism can drive the first and second support rollers to rotate in the same direction. In conjunction with the drive lifting mechanism, which moves to press the outer wall of the small-diameter cup, the first and second support rollers will cause the cup to rotate stably. While the cup rotates, the sticker's image and text can be transferred. The elastic pressing mechanism applies elastic pressure to the outer wall of the cup, ensuring the sticker adheres tightly to the cup and guaranteeing the transfer effect. Furthermore, cups of different diameters can be placed in the placement area to be supported by the first and second support rollers, and the elastic pressing mechanism can also adapt to pressing cups of different diameters. 2. In this application, one type of elastic pressing mechanism is mainly used to adapt to the outer wall of a straight cup; when the lifting drive moves the frame downward, the pressing roller can contact the outer wall of the straight cup, the sliding column can slide along the connecting hole, the elastic element can provide elastic pressure to keep the pressing roller always in contact with the outer wall of the straight cup, and the cooperation between the sliding column and the elastic element can buffer the pressure to avoid damaging the cup, while ensuring that the transfer sticker is evenly pressed; another type of elastic pressing mechanism can press cups with different diameter cup walls, multiple mounting seats can move independently vertically to adapt to the outer diameter changes of different positions of the cup as much as possible, and the locking component can lock the position of the mounting seat to ensure pressing stability. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a transfer decal device suitable for small-diameter cups according to Embodiment 1 of this application; Figure 2 This is a schematic diagram of the structure used to illustrate the drive mechanism in Example 1; Figure 3 This is a cross-sectional view of Embodiment 1 used to illustrate the elastic pressing mechanism; Figure 4 This is a schematic diagram illustrating the structure of the cup in Example 2; Figure 5 This is a schematic diagram of the overall structure of a transfer decal device suitable for small-diameter cups according to Embodiment 2 of this application; Figure 6 This is a schematic diagram of the elastic pressing mechanism in Example 2; Figure 7 This is a cross-sectional view of Embodiment 2 used to illustrate the elastic pressing mechanism; Figure 8 This is a schematic diagram of the structure used to illustrate the elastic pressure-resistant component in Embodiment 2.

[0025] In the attached diagram, the following are labeled: 1. Frame; 11. Lifting drive component; 2. Base; 21. First bearing roller; 22. Second bearing roller; 23. Placement area; 3. Drive mechanism; 31. Drive component; 32. First transmission gear; 33. Second transmission gear; 34. First synchronous pulley; 35. Second synchronous pulley; 36. Synchronous belt; 4. Elastic pressing mechanism; 41. Frame; 411. Connecting hole; 42. Sliding column; 43. Pressing roller; 44. Elastic component; 45. Mounting bracket; 46. 1. Receiving hole; 46. Mounting base; 461. Column; 462. Limiting part; 47. Locking assembly; 471. Expansion locking element; 48. Elastic pressing assembly; 481. Force-bearing element; 4811. Force-bearing plane; 482. Second elastic element; 483. Connecting shaft; 484. Mounting arm; 485. Pressing wheel; 4851. Tube body; 4852. Elastic wheel sleeve; 486. Force-applying element; 4861. Arc protrusion; 487. First elastic element; 6. Displacement detection element. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention. Example

[0028] Embodiment 1 of this application discloses a transfer decal device suitable for small-diameter cups. It is used to apply decals to the outer wall of a straight cup.

[0029] Reference Figure 1 and Figure 2 A transfer decal device suitable for small-diameter cups includes a frame 1, a base 2 fixedly connected to the frame 1, and a first support roller 21 and a second support roller 22 rotatably connected to the base 2. The first support roller 21 and the second support roller 22 both include an elastic layer on the outer wall, the elastic layer being made of materials such as rubber. The first support roller 21 and the second support roller 22 are at the same height, and a placement area 23 is formed between the first support roller 21 and the second support roller 22, allowing the cup to be placed in the placement area 23 so that the cup is supported by the first support roller 21 and the second support roller 22.

[0030] Reference Figure 1 and Figure 2 The frame 1 has a drive mechanism 3 located on one side of the base 2, which is connected to the first support roller 21 and the second support roller 22. The drive mechanism 3 can drive the first support roller 21 and the second support roller 22 to rotate in the same direction. A transfer decal device suitable for small-diameter cups also includes a lifting drive component 11, which is located above the placement area 23. The lifting drive component 11 is, for example, a cylinder. The lifting drive component 11 is connected to an elastic pressing mechanism 4. The lifting drive component 11 can drive the elastic pressing mechanism 4 to move down to press the cup in the placement area 23 onto the first support roller 21 and the second support roller 22.

[0031] After the sticker is affixed to the straight wall of the cup, the cup is placed in the placement area 23. The first support roller 21 and the second support roller 22 support the cup. The drive mechanism 3 drives the first support roller 21 and the second support roller 22 to rotate in the same direction, thereby driving the cup to rotate. At the same time, the lifting drive component 11 drives the elastic pressing mechanism 4 to move down and press the cup onto the first support roller 21 and the second support roller 22. At this time, as the cup rotates, the graphics on the sticker will be transferred to the straight outer wall of the cup.

[0032] In this application, cups of different diameters can be placed in the placement area 23 and supported by the first support roller 21 and the second support roller 22. The elastic pressing mechanism 4 can also be adapted to press cups of different diameters, so it is possible to transfer decals onto the outer wall of the straight cup of different diameters.

[0033] Reference Figure 1 and Figure 2 The driving mechanism 3 includes a driving component 31, such as a gearbox. The specific structure of the gearbox is existing technology and will not be described in detail here. The driving component 31 is connected to a first transmission gear 32. The first bearing roller 21 is fixedly connected to a second transmission gear 33. The second transmission gear 33 and the first bearing roller 21 can rotate together. The first transmission gear 32 and the second transmission gear 33 are externally meshed. The first bearing roller 21 is also fixedly connected to a first synchronous pulley 34. The first bearing roller 21 and the first synchronous pulley 34 can also rotate together. The second bearing roller 22 is fixedly connected to a second synchronous pulley 35. The first synchronous pulley 34 and the second synchronous pulley 35 are connected together to a synchronous belt 36.

[0034] The gearbox can drive the first transmission gear 32 to rotate, which in turn drives the second transmission gear 33 and the first bearing roller 21 to rotate together. When the first bearing roller 21 rotates, it will drive the first synchronous pulley 34 to rotate, which will drive the second synchronous pulley 35 to rotate through the synchronous belt 36. The rotation of the second synchronous pulley 35 will drive the second bearing roller 22 to rotate together. At this time, the first bearing roller 21 and the second bearing roller 22 rotate synchronously and in the same direction.

[0035] Reference Figure 1 and Figure 3The elastic pressing mechanism 4 includes a frame 41 connected to the lifting drive component 11. The frame 41 has a connecting hole 411, which is vertically oriented. A sliding column 42 is slidably connected to the connecting hole 411. A pressing roller 43, which is rotatably connected to the sliding column 42, is arranged in the same direction as the first bearing roller 21. The pressing roller 43 includes an elastic layer on its outer wall, and the elastic layer is made of materials such as rubber. An elastic element 44, such as a spring, is sleeved on the sliding column 42. The two ends of the elastic element 44 are respectively connected to the frame 41 and the sliding column 42. When the sliding column 42 moves upward, the elastic element 44 is compressed.

[0036] After the cup is placed in the placement area 23, the lifting drive 11 drives the frame 41 to move down gradually. The pressing roller 43 will contact the outer wall of the straight cup, and the sliding column 42 will slide up along the connecting hole 411. The elastic member 44 is compressed, and the elastic member 44 provides elastic pressure so that the pressing roller 43 always fits against the outer wall of the straight cup.

[0037] The implementation principle of the transfer decal device for small-diameter cups in Embodiment 1 of this application is as follows: After the sticker is affixed to the straight wall of the cup, the cup is placed in the placement area 23. The first bearing roller 21 and the second bearing roller 22 support the cup. The lifting drive 11 drives the frame 41 to gradually move down. The pressing roller 43 contacts the outer wall of the straight cup. The sliding column 42 slides upward along the connecting hole 411. The elastic member 44 is compressed. The elastic member 44 provides elastic pressure so that the pressing roller 43 always fits against the outer wall of the straight cup. The drive gearbox drives the first transmission gear 32 to rotate, thereby driving the second transmission gear 33 and the first bearing roller 21 to rotate together. The rotation of the first bearing roller 21 drives the first synchronous pulley 34 to rotate, thereby driving the second synchronous pulley 35 to rotate through the synchronous belt 36. The rotation of the second synchronous pulley 35 will drive the second bearing roller 22 to rotate together. At this time, the first bearing roller 21 and the second bearing roller 22 rotate synchronously and in the same direction. The cup will rotate, and the graphics on the sticker will be transferred to the straight outer wall of the cup. Example

[0038] Reference Figure 4 and Figure 5 The difference between Embodiment 2 and Embodiment 1 lies in the structure of the elastic pressing mechanism 4. Embodiment 2 is used for applying decals to cups with multiple sections of different diameters. For example, the cup body includes a thick tube section, a tapered tube section, and a thin tube section connected in sequence. Figure 4 This is a schematic diagram of the cup's structure.

[0039] Reference Figure 5 and Figure 6The elastic pressing mechanism 4 includes a mounting frame 45 connected to the lifting drive component 11. The mounting frame 45 is provided with a plurality of vertically movable mounting seats 46. In this embodiment, there are three mounting seats 46. The mounting frame 45 is provided with a locking component 47 that can lock the plurality of mounting seats 46. Each mounting seat 46 is equipped with an elastic pressing component 48, that is, there are also three elastic pressing components 48.

[0040] After the cup is placed in the placement area 23, the lifting drive 11 drives the three mounting brackets 45 to move down synchronously. At this time, the left elastic pressing component 48 is used to press the thick tube part, the middle elastic pressing component 48 is used to press the tapered tube part, and the right elastic pressing component 48 is used to press the thin tube part.

[0041] Reference Figure 6 and Figure 7 The mounting base 46 includes a column 461. The mounting bracket 45 has a vertically oriented receiving hole 451. The column 461 is slidably connected to the receiving hole 451. A first elastic element 487, which is a spring, is fitted onto the column 461. The two ends of the first elastic element 487 are connected to the column 461 and the mounting bracket 45, respectively. When the column 461 moves upward, the first elastic element 487 is compressed. The locking assembly 47 includes three expansion locking elements 471, corresponding to the number of mounting bases 46. These expansion locking elements 471 are, for example, air rings. Supplying air to the air rings causes them to expand. The expansion locking elements 471 are mounted on the mounting bracket 45 and can expand to lock the column 461 or return to their original position to release the lock.

[0042] When the diameter difference between the thick and thin tube sections is too large, if the three elastic pressing components 48 of the same height move downwards and press against the outer wall of the cup, the thick tube section will be subjected to a greater force, while the thin tube section will be subjected to a smaller force. This situation may lead to damage to the straight tube section and unreliable image transfer. To address this, in this embodiment, the expansion locking member 471 is first released from locking the right-hand column 461, and the right-hand column 461 is moved downwards, causing the elastic pressing component 48 to move downwards. Then, the expansion locking member 471 is used to lock the column 461, thereby ensuring that the elastic pressing component 48 corresponding to the column 461 can reliably press against the thin tube section subsequently.

[0043] Reference Figure 7 and Figure 8 The elastic pressing component 48 includes a force-receiving member 481 slidably connected to the mounting base 46. The force-receiving member 481 is provided with a second elastic member 482, such as a spring. The two ends of the second elastic member 482 are respectively connected to the force-receiving member 481 and the mounting base 46. When the force-receiving member 481 moves upward, the second elastic member 482 is compressed.

[0044] Reference Figure 7 and Figure 8 A connecting shaft 483 is connected to the mounting base 46. The connecting shaft 483 is horizontally positioned and rotatably connected to a mounting arm 484. A pressing wheel 485 is rotatably connected to the mounting arm 484. The axis of the pressing wheel 485 is in the same direction as the axis of the connecting shaft 483. The mounting arm 484 has a force-applying member 486. Rotation of the mounting arm 484 causes the force-applying member 486 to press against the force-receiving member 481, causing the force-receiving member 481 to move upward, compressing the second elastic member 482. Furthermore, to reduce wear on the force-receiving member 481, the force-receiving member 481 includes a force-receiving plane 4811, and the force-applying member 486 includes an arc-shaped protrusion 4861 that contacts the force-receiving plane 4811. To prevent the mounting arm 484 from rotating under gravity and causing the force-receiving member 481 to disengage from the force-applying member 486, a limiting part 462 is provided on the mounting base 46. Figure 8 The limiting part 462 is used to limit the clockwise rotation of the force-applying part 486.

[0045] When the lifting drive 11 moves the mounting base 46 down, the pressing wheel 485 contacts the cup body and drives the mounting arm 484 to rotate around the connecting shaft 483. The force-applying component 486 can rotate with the mounting arm 484 to press the force-receiving component 481. The second elastic component 482 is compressed to generate a reverse elastic force, so that the pressing wheel 485 always adaptively fits the outer wall of the cup body.

[0046] Reference Figure 8 To ensure reliable pressing of the tapered tube section by the pressing roller 485, the pressing roller 485 includes a tube body 4851 rotatably connected to the mounting arm 484 and an elastic sleeve 4852 connected to the tube body 4851. The elastic sleeve 4852 is bolted to the tube body 4851, and the elastic sleeve 4852 can be disassembled and replaced with other types of elastic sleeves 4852. Figure 7 In order to ensure that the middle pressing wheel 485 presses evenly and reliably on the tapered tube, the middle elastic wheel sleeve 4852 is tapered.

[0047] Of course, in other embodiments, if the area to be pressed on the surface of the cup is of other shapes, such as an annular groove or an annular protrusion, it can be adapted by replacing the elastic sleeve 4852.

[0048] Reference Figure 7 and Figure 8 The mounting base 46 is equipped with a displacement detection element 6, which is used to detect the displacement of the force-bearing component 481. The displacement detection element 6 can be, for example, a Hall sensor or a laser displacement sensor. The displacement detection element 6 can detect the displacement of the force-bearing component 481 in real time and then calculate the pressing force of the pressing roller 485 on the cup body. Based on the detection data, the height of the elastic pressing component 48 can be adjusted to help adjust the pressing force, so as to avoid excessive pressure damaging the cup body or insufficient pressure affecting the transfer effect.

[0049] The implementation principle of the transfer decal device for small-diameter cups in Embodiment 2 of this application is as follows: After the cup is placed in the placement area 23, the lifting drive component 11 drives the three mounting brackets 45 to move down synchronously. At this time, the left elastic pressing component 48 presses against the thick tube part, the middle elastic pressing component 48 presses against the tapered tube part, and the right elastic pressing component 48 presses against the thin tube part.

[0050] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A transfer decal device suitable for small-diameter cups, characterized in that: The device includes a base (2), which is rotatably connected to a first bearing roller (21) and a second bearing roller (22) arranged adjacent to each other. A placement area (23) is formed between the first bearing roller (21) and the second bearing roller (22). A drive mechanism (3) is provided on one side of the base (2) and connected to the first bearing roller (21) and the second bearing roller (22). The drive mechanism (3) can drive the first bearing roller (21) and the second bearing roller (22) to rotate in the same direction. It also includes a lifting drive (11), which is connected to an elastic pressing mechanism (4) located above the placement area (23).

2. The transfer decal device suitable for small-diameter cups according to claim 1, characterized in that: The drive mechanism (3) includes a drive component (31), which is connected to a first transmission gear (32). The first bearing roller (21) is connected to a second transmission gear (33), and the first transmission gear (32) meshes with the second transmission gear (33). The first bearing roller (21) is also connected to a first synchronous pulley (34), and the second bearing roller (22) is connected to a second synchronous pulley (35). The first synchronous pulley (34) and the second synchronous pulley (35) are connected to a synchronous belt (36).

3. The transfer decal device suitable for small-diameter cups according to claim 1, characterized in that: The elastic pressing mechanism (4) includes a frame (41) connected to the lifting drive (11). The frame (41) has a connecting hole (411). A sliding column (42) is slidably connected to the connecting hole (411). A pressing roller (43) arranged in the same direction as the first bearing roller (21) is rotatably connected to the sliding column (42). An elastic member (44) is sleeved on the sliding column (42). The two ends of the elastic member (44) are respectively connected to the frame (41) and the sliding column (42).

4. The transfer decal device suitable for small-diameter cups according to claim 1, characterized in that: The elastic pressing mechanism (4) includes a mounting frame (45) connected to the lifting drive (11). The mounting frame (45) is provided with a plurality of vertically movable mounting seats (46). The mounting frame (45) is provided with a locking component (47) capable of locking the plurality of mounting seats (46). Each mounting seat (46) is equipped with an elastic pressing component (48).

5. A transfer decal device suitable for small-diameter cups according to claim 4, characterized in that: The mounting base (46) includes a column (461), the mounting bracket (45) has a vertically arranged receiving hole (451), the column (461) is slidably connected to the receiving hole (451), the column (461) is fitted with a first elastic member (487), the two ends of the first elastic member (487) are respectively connected to the column (461) and the mounting bracket (45); the locking assembly (47) includes an expansion locking member (471), the expansion locking member (471) is installed on the mounting bracket (45), and the expansion locking member (471) can expand to lock the column (461) or unlock it.

6. The transfer decal device suitable for small-diameter cups according to claim 4, characterized in that: The elastic pressure-bearing assembly (48) includes a force-bearing member (481) slidably connected to the mounting base (46). The force-bearing member (481) is provided with a second elastic member (482), and the two ends of the second elastic member (482) are respectively connected to the force-bearing member (481) and the mounting base (46). A connecting shaft (483) is connected to the mounting base (46), and a mounting arm (484) is rotatably connected to the connecting shaft (483). The mounting arm (484) is rotatably connected to the mounting base (46). The mounting arm (484) is equipped with a pressing wheel (485) and a force-applying component (486). When the pressing wheel (485) presses the cup body under force, the mounting arm (484) rotates to make the force-applying component (486) press the force-receiving component (481), and the second elastic component (482) is compressed. The pressing wheel (485) includes a tube body (4851) rotatably connected to the mounting arm (484) and an elastic wheel sleeve (4852) detachably connected to the tube body (4851).

7. A transfer decal device suitable for small-diameter cups according to claim 6, characterized in that: The force-receiving component (481) includes a force-receiving plane (4811), and the force-applying component (486) includes an arc-shaped protrusion (4861) that contacts the force-receiving plane (4811).

8. A transfer decal device suitable for small-diameter cups according to claim 6, characterized in that: The mounting base (46) is provided with a displacement detection element (6), which is used to detect the displacement of the force-bearing element (481) so as to obtain the pressing force of the pressing wheel (485) on the cup body based on the displacement.

Images