Secondary pressing equipment for test tube labels

Abstract

The utility model discloses secondary pressing equipment for test tube labels. The secondary pressing equipment comprises a main frame; the conveying mechanism is assembled on the main frame, and the conveying mechanism is used for conveying test tubes; the pressing mechanism is assembled above the conveying mechanism and is used for applying pressing force to the test tubes on the conveying mechanism; and the driving mechanism is assembled on the main frame, and the driving mechanism is used for providing driving force for the conveying mechanism and the pressing mechanism. The pressing mechanism is assembled above the conveying mechanism and can be used for accurately pressing the conveyed test tubes. By applying proper pressing force to the test tube, good adhesion between the label and the surface of the test tube can be ensured, so that the problem that the label falls off is solved.

Description

Technical Field

[0001] The utility model relates to the technical field related to test tube labeling, in particular to a test tube label secondary pressing device. Background Art

[0002] In modern medical and biological laboratories, test tubes are an indispensable experimental tool. Accurate labeling of test tubes is crucial for recording experimental results, identifying the contents of test tubes, and the smooth progress of subsequent experimental operations. However, in the process of labeling test tubes, the problem of labels not being firmly affixed often occurs. The operating speed and pressure setting when labeling may affect the adhesion effect of the label. If the speed is too fast or the pressure is insufficient, the label may not be fully adhered to the test tube, causing the label to fall off. Label shedding will not only lead to the loss of test tube information, making it impossible for the experimenter to accurately identify the contents of the test tube, but may also affect the accuracy and reliability of the experimental results. Therefore, ensuring that the label is firmly affixed is of great significance to ensuring the quality and efficiency of the experiment.

[0003] To solve this problem, traditional methods usually require workers to perform secondary screening and manual labeling. However, this method not only increases the workload of workers and reduces work efficiency, but also may introduce human errors and affect the accuracy of labels. In addition, the manual labeling method may also cause contamination or damage to the test tube, further affecting the reliability of the experimental results. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the utility model provides a test tube label secondary pressing device, which can automatically perform secondary pressing on the test tube label to ensure that the label is firmly attached.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] A test tube label secondary pressing device comprises: a main frame; a conveying mechanism, which is mounted on the main frame and used to convey the test tube; a pressing mechanism, which is mounted above the conveying mechanism and used to apply a pressing force to the test tube on the conveying mechanism; and a driving mechanism, which is mounted on the main frame and used to provide a driving force for the conveying mechanism and the pressing mechanism.

[0007] By adopting the above solution, the pressing mechanism is assembled above the conveying mechanism, and can accurately press the test tube being conveyed. By applying appropriate pressing force to the test tube, it can ensure that the label is well adhered to the surface of the test tube, thereby solving the problem of label falling off.

[0008] Further, the conveying mechanism includes: a first active conveying mechanism, the first active conveying mechanism includes a support frame, a pulley and a conveyor belt, the pulley is rotatably mounted on the support frame, and the conveyor belt is wound between at least two pulleys; a second passive conveying mechanism, the second passive conveying mechanism includes a chain and a plurality of conveying rollers driven by the chain, and the conveying rollers are used to carry test tubes; wherein, the first active conveying mechanism is provided with two groups, which are respectively arranged on both sides of the conveying rollers in the second passive conveying mechanism to clamp the two ends of the test tube.

[0009] By adopting the above solution, the stability of the test tube during the movement is ensured. This design method is suitable for the smooth transmission of the test tube, especially for the fixation and protection of the label position.

[0010] Furthermore, the driving mechanism comprises an active motor and a passive motor, the active motor is drivingly connected to the pulley, and the passive motor is drivingly connected to the chain via a gear set.

[0011] By adopting the above solution, the driving connection between the active motor and the pulley ensures the efficient and stable operation of the conveyor belt, and the design of the driving connection between the passive motor and the chain through the gear set makes the rotation of the conveyor roller more stable and reliable.

[0012] Furthermore, the main frame includes: a bottom plate; side plates, which are vertically mounted on both sides of the bottom plate; a mounting plate, which is vertically connected to the top of the side plate and is used to cover the chain, and the first active transmission mechanism is mounted on the mounting plate.

[0013] By adopting the above solution, the design of the main frame prevents splashing or debris from falling during the movement of the chain, enhances the aesthetics of the entire mechanism, and ensures the stable operation and efficient work of the entire test tube label secondary pressing mechanism.

[0014] Furthermore, the clamping mechanism includes: an outer shell, which is assembled on the main frame; a clamping roller, which is rotatably connected to the inside of the outer shell, and the outer surface of the clamping roller is wrapped with a flexible layer that can elastically deform itself, and the clamping roller abuts against the test tube.

[0015] By adopting the above solution, the flexible layer wrapped around the outer surface of the pressing roller not only increases the contact area with the test tube, but also makes the pressing process gentler, avoiding the situation where the test tube or label is damaged due to excessive pressure; the abutment design between the pressing roller and the test tube ensures that the pressing mechanism can directly act on the test tube to achieve the pressing of the label. This design is simple and effective, and can significantly improve the adhesion and reliability of the label.

[0016] Furthermore, a water absorption roller is rotatably connected in the outer shell, the water absorption roller is spaced apart from the pressing roller, the water absorption roller is wrapped with a water absorption layer which can elastically deform itself, and the water absorption roller abuts against the test tube.

[0017] By adopting the above scheme, the water absorption roller and the pressing roller are arranged at intervals. Such a layout ensures that the two can work independently without interfering with each other. At the same time, this design also enables the test tube to pass through the water absorption roller and the pressing roller in sequence during the transmission process, completing the two actions of water absorption and pressing successively. The abutment design of the water absorption roller and the test tube ensures that the water absorption roller can directly act on the surface of the test tube to effectively remove excess water.

[0018] Furthermore, longitudinal slide grooves are arranged on both sides of the outer shell, and a hydraulic rod is arranged inside the outer shell. One end of the hydraulic rod is fixed to the top of the outer shell, and the other end is used to drive the clamping roller and / or the water absorption roller to perform linear reciprocating motion along the slide groove.

[0019] By adopting the above solution, the adaptability and flexibility of the pressing mechanism are enhanced, and its processing capability for test tubes of different specifications is improved.

[0020] Furthermore, the suction roller includes a suction roller column, a suction roller shaft and suction roller frames located at both ends of the suction roller shaft, and the pressure roller includes a pressure roller column, a pressure roller shaft and pressure roller frames located at both ends of the pressure roller shaft. A connecting rod is arranged between the suction roller frame and the pressure roller frame, and the connecting rod is used to make the pressure roller and the suction roller move synchronously along the slide groove.

[0021] By adopting the above scheme, the composition design of the suction roller and the pressure roller and the connection rod design between them enable the two to work together and move synchronously along the slideway. This design not only improves the stability and reliability of the mechanism, but also simplifies the operation process, effectively realizes the synchronous lifting effect, and improves work efficiency.

[0022] Furthermore, a mounting block is provided between the main frame and the clamping mechanism, the mounting block is integrally connected to the main frame, and the mounting block is detachably connected to the clamping mechanism.

[0023] By adopting the above solution, the clamping mechanism can be installed and debugged as an independent module, reducing the installation difficulty and debugging cost. At the same time, when the clamping mechanism fails or needs to be replaced, it can be disassembled separately for repair or replacement without disassembling or adjusting the entire main frame.

[0024] Furthermore, the driving mechanism further comprises a pressure roller motor, and the pressure roller motor is drivingly connected to the pressure roller and / or the water suction roller.

[0025] By adopting the above scheme, the speed and direction of the pressure roller and the suction roller can be directly controlled. This direct drive method reduces energy loss and transmission error, making the movement of the pressure roller and the suction roller smoother and more precise. At the same time, by adjusting the parameters of the pressure roller motor, the speed and direction of the pressure roller and the suction roller can be easily adjusted to meet different work requirements.

[0026] In summary, the test tube label secondary pressing device provided by the utility model has the following technical effects:

[0027] 1. By setting a pressing mechanism to press the label on the test tube again, it can ensure that the label is tightly attached to the surface of the test tube and is not easy to fall off or shift, thereby improving the durability and reliability of the label;

[0028] 2. It helps to reduce manual intervention and operational difficulty. The traditional label pasting method often requires multiple manual checks and adjustments, which is not only inefficient but also prone to errors. This mechanism automatically presses the labels, reducing the tediousness and error rate of manual operations and improving work efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the utility model;

[0030] Figure 2 for Figure 1 Enlarged view of area A in the middle;

[0031] Figure 3 for Figure 1 Enlarged view of area B in the middle;

[0032] Figure 4 This is a schematic diagram of the three-dimensional structure of the main frame of an embodiment of the utility model;

[0033] Figure 5 It is a schematic diagram of the longitudinal cross-sectional structure of the pressing mechanism and the conveying mechanism of the embodiment of the utility model;

[0034] Figure 6 It is a schematic diagram of the internal structure of the clamping mechanism of an embodiment of the utility model.

[0035] Among them, the meanings of the accompanying drawings are as follows: 1. main frame; 11. bottom plate; 12. side plate; 13. mounting plate; 2. conveying mechanism; 21. first active conveying mechanism; 211. support frame; 212. pulley; 213. conveyor belt; 22. second passive conveying mechanism; 221. chain; 222. conveying roller; 3. clamping mechanism; 31. outer shell; 311. slide groove; 32. clamping roller; 321. flexible layer; 322. clamping roller column; 323. clamping roller shaft; 324. clamping roller frame; 33. water absorption roller; 331. water absorption layer; 332. water absorption roller column; 333. water absorption roller shaft; 334. water absorption roller frame; 34. hydraulic rod; 35. connecting rod; 4. driving mechanism; 41. active motor; 42. passive motor; 43. pressure roller motor; 5. test tube; 6. mounting block. DETAILED DESCRIPTION

[0036] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0040] Embodiment 1 of the present utility model is referred to Figure 1As shown, a test tube label secondary pressing device is disclosed: it includes a main frame 1, a conveying mechanism 2, a pressing mechanism 3 and a driving mechanism 4, the conveying mechanism 2 is assembled on the main frame 1, the conveying mechanism 2 is used to convey the test tube 5, the pressing mechanism 3 is assembled above the conveying mechanism 2, and is used to apply a pressing force to the test tube 5 on the conveying mechanism 2, and can accurately perform a pressing operation on the test tube 5 being transported, the driving mechanism 4 is assembled on the main frame 1, and the driving mechanism 4 is used to provide a driving force for the conveying mechanism 2 and the pressing mechanism 3, and by applying an appropriate pressing force to the test tube 5, it can be ensured that the label is well adhered to the surface of the test tube 5, thereby solving the problem of label falling off.

[0041] Specifically, in this embodiment 1, the main frame 1 is a supporting frame, which is used to limit and fix the conveying mechanism 2. The conveying mechanism 2 uses a conveyor belt 213 in this embodiment 1. The surface of the conveyor belt 213 has a plurality of tubular grooves that can accommodate test tubes 5. The length direction of the tubular grooves is perpendicular to the conveying direction of the conveyor belt 213. The clamping mechanism 3 includes a clamping roller 32 and an outer shell 31. The clamping roller 32 includes a clamping roller column 322, a clamping roller shaft 323 and a clamping roller frame 324 located at both ends of the clamping roller shaft 323. The clamping roller frame 324 is assembled on the outer shell 31. The clamping roller column 322 is sleeved on the clamping roller shaft 323 and is used to clamp the test tube 5 in the tubular groove of the conveyor belt 213. The outer surface of the clamping roller 32 is wrapped with a flexible layer 321 that can elastically deform itself. The clamping roller 32 is in contact with the test tube 5. The drive motor is used to drive the conveyor belt 213 to rotate. The driving mechanism 4 further includes a pressure roller motor 43 , which is drivingly connected to the pressure roller 32 and can directly control the rotation speed and direction of the pressure roller 32 .

[0042] The working principle of this embodiment 1 is as follows: the test tube 5 labeled by the labeling machine is sent to the conveyor belt 213, and the conveyor belt 213 conveys the test tube 5 to the bottom of the clamping mechanism 3. The flexible layer 321 on the surface of the clamping roller 322 and the tubular groove clamp the test tube 5 with each other, thereby compressing the label on the surface of the test tube 5 to achieve a secondary clamping effect. Preferably, the flexible layer 321 is made of rubber.

[0043] Embodiment 2 of the present utility model is referred to Figure 1-6As shown, the main frame 1 includes a bottom plate 11 , side plates 12 and a mounting plate 13 . The side plates 12 are vertically assembled on both sides of the bottom plate 11 , and the mounting plate 13 is vertically connected to the top of the side plates 12 . The conveying mechanism 2 includes a first active conveying mechanism 21 and a second passive conveying mechanism 22. The first active conveying mechanism 21 is assembled on the mounting plate 13. The first active conveying mechanism 21 includes multiple support frames 211, multiple pulleys 212 and a conveyor belt 213. The support frame 211 is concave in shape. The pulley 212 is rotatably assembled in the groove of the support frame 211. The conveyor belt 213 is wound between at least multiple pulleys 212, and at least between two pulleys 212; the second passive conveying mechanism 22 includes a chain 221 and a plurality of conveying rollers 222 driven by the chain 221. The conveying rollers 222 are used to carry the test tube 5, and the mounting plate 13 can be used to cover the chain 221; wherein, the first active conveying mechanism 21 is provided with two groups, which are respectively arranged on both sides of the conveying roller 222 in the second passive conveying mechanism 22 to clamp the two ends of the test tube 5. The driving mechanism 4 includes an active motor 41 and a passive motor 42, wherein the active motor 41 is drivingly connected to the pulley 212, and the passive motor 42 is drivingly connected to the chain 221 via a gear set. The driving mechanism 4 also includes a pressure roller motor 43, which is drivingly connected to the pressure roller 32 and / or the water absorption roller 33, and can directly control the rotation speed and direction of the pressure roller 32 and the water absorption roller 33.

[0044] The clamping mechanism 3 includes an outer shell 31 and a clamping roller 32. The outer shell 31 is assembled on the main frame 1. The clamping roller 32 is rotatably connected to the inside of the outer shell 31. The outer surface of the clamping roller 32 is wrapped with a flexible layer 321 that can elastically deform itself. The clamping roller 32 abuts against the test tube 5. The flexible layer 321 wrapped on the outer surface of the clamping roller 32 not only increases the contact area with the test tube 5, but also makes the clamping process softer, avoiding damage to the test tube 5 or the label due to excessive pressure, and ensuring that the clamping mechanism 3 can directly act on the test tube 5 to achieve compression of the label.

[0045] The working principle of this embodiment 2 is as follows: the test tube 5 labeled by the labeling machine is sent to the conveying roller 222 of the second passive conveying mechanism 22, and the two ends of the test tube 5 are abutted on the conveyor belt 213 in the first active conveying mechanism 21, and the active click drives the conveyor belt 213 on both sides of the conveying roller 222 to rotate, thereby clamping the test tube 5 on the conveying roller 222 to displace, and when the test tube 5 moves to the bottom of the clamping mechanism 3, the flexible layer 321 on the surface of the clamping roller 322 and the tubular groove clamp the test tube 5 with each other, thereby compressing the label on the surface of the test tube 5 to achieve a secondary clamping effect. It should be noted that, in order to avoid rigid collision with the test tube 5, the conveying roller 222 can also be covered with a flexible layer 321 on the surface of the conveying roller 222. Preferably, the flexible layer 321 of the conveying roller 222 and the clamping roller 32 is made of rubber.

[0046] Optionally, the pressing mechanism 3 further includes a water-absorbing roller 33, which is rotatably arranged in the outer shell 31, and is spaced apart from the pressing roller 32. The water-absorbing roller 33 is wrapped with a water-absorbing layer 331 that can be elastically deformed, and the water-absorbing roller 33 abuts against the test tube 5. Preferably, the water-absorbing layer 331 is a water-absorbing cotton or sponge. The water-absorbing roller 33 and the pressing roller 32 are spaced apart to ensure that the two can work independently and do not interfere with each other. At the same time, the test tube 5 can pass through the water-absorbing roller 33 and the pressing roller 32 in turn during the transmission process, and successively complete the two actions of absorbing water and pressing. The abutment design of the water-absorbing roller 33 and the test tube 5 ensures that the water-absorbing roller 33 can directly act on the surface of the test tube 5, effectively remove excess water, and avoid the problem of label loosening caused by a humid environment.

[0047] In order to enable the clamping mechanism 3 to clamp the test tube 5 more flexibly and to adjust the clamping gap according to the size of the test tube 5, in some implementations, longitudinal slide grooves 311 are provided on both sides of the outer shell 31, and a hydraulic rod 34 is provided in the outer shell 31, one end of the hydraulic rod 34 is fixed to the top of the outer shell 31, and the other end is used to drive the clamping roller 32 and / or the water absorption roller 33 to perform linear reciprocating motion along the slide groove 311. Specifically, the water suction roller 33 includes a water suction roller column 332, a water suction roller shaft 333 and a water suction roller frame 334 located at both ends of the water suction roller shaft 333, and the pressure roller 32 includes a pressure roller column 322, a pressure roller shaft 323 and a pressure roller frame 324 located at both ends of the pressure roller shaft 323, and a connecting rod 35 is arranged between the water suction roller frame 334 and the pressure roller frame 324, and the other end of the hydraulic rod 34 is connected to the connecting rod 35, so that the connecting rod 35 can make the pressure roller 32 and the water suction roller 33 move synchronously along the slide groove 311.

[0048] In some embodiments, a mounting block 6 may be provided between the main frame 1 and the clamping mechanism 3 to raise the position of the conveyor belt 213 in the first active conveying mechanism 21 to avoid friction with the conveying roller 222. The mounting block 6 is integrally connected to the main frame 1, preferably integrally formed by die casting, and the mounting block 6 is detachably connected to the clamping mechanism 3, preferably connected by screws. In this way, the clamping mechanism 3 can be installed and debugged as an independent module, reducing the installation difficulty and debugging cost. At the same time, when the clamping mechanism 3 fails or needs to be replaced, it can be disassembled separately for repair or replacement without disassembling or adjusting the entire main frame 1.

[0049] In summary, the test tube label secondary pressing device provided by the utility model has the following technical effects:

[0050] 1. By providing a pressing mechanism 3 to press the label on the test tube 5 again, it can be ensured that the label is closely attached to the surface of the test tube 5 and is not easy to fall off or shift, thereby improving the durability and reliability of the label;

[0051] 2. It helps to reduce manual intervention and operational difficulty. The traditional label pasting method often requires multiple manual checks and adjustments, which is not only inefficient but also prone to errors. This mechanism automatically compresses the labels, reducing the tediousness and error rate of manual operations and improving work efficiency and accuracy.

[0052] 3. It can be adjusted and optimized according to different specifications and materials of test tubes 5 to adapt to various complex processing environments and work requirements. At the same time, the mechanism can also be integrated with other automated equipment to realize the automation and intelligence of the test tube 5 processing process, further improving work efficiency and reducing labor costs.

[0053] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A test tube label secondary pressing device, characterized in that: include: Main frame (1); A conveying mechanism (2), the conveying mechanism (2) being mounted on the main frame (1), and the conveying mechanism (2) being used for conveying the test tube (5); A clamping mechanism (3), the clamping mechanism (3) being mounted above the conveying mechanism (2) and being used to apply a clamping force to the test tube (5) on the conveying mechanism (2); A driving mechanism (4), wherein the driving mechanism (4) is mounted on the main frame (1), and the driving mechanism (4) is used to provide driving force for the conveying mechanism (2) and the pressing mechanism (3).

2. A test tube label secondary pressing device according to claim 1, characterized in that: The conveying mechanism (2) comprises: A first active transmission mechanism (21), the first active transmission mechanism (21) comprising a support frame (211), a belt pulley (212) and a conveyor belt (213), the belt pulley (212) being rotatably mounted on the support frame (211), and the conveyor belt (213) being wound between at least two belt pulleys (212); A second passive conveying mechanism (22), the second passive conveying mechanism (22) comprising a chain (221) and a plurality of conveying rollers (222) driven by the chain (221), the conveying rollers (222) being used to carry the test tube (5); The first active conveying mechanism (21) is provided with two groups, which are respectively arranged on both sides of the conveying roller (222) in the second passive conveying mechanism (22) to clamp the two ends of the test tube (5).

3. A test tube label secondary pressing device according to claim 2, characterized in that: The driving mechanism (4) comprises an active motor (41) and a passive motor (42); the active motor (41) is drivingly connected to the pulley (212), and the passive motor (42) is drivingly connected to the chain (221) via a gear set.

4. The test tube label secondary pressing device according to claim 2, characterized in that: The main frame (1) comprises: Bottom plate (11); Side panels (12), the side panels (12) being vertically mounted on both sides of the bottom panel (11); A mounting plate (13), wherein the mounting plate (13) is vertically connected to the top of the side plate (12) and is used to shield the chain (221); the first active transmission mechanism (21) is assembled on the mounting plate (13).

5. The test tube label secondary pressing device according to claim 1, characterized in that: The pressing mechanism (3) comprises: An outer shell (31), the outer shell (31) being assembled on the main frame (1); A pressing roller (32), the pressing roller (32) is rotatably connected to the inside of the outer shell (31), the outer surface of the pressing roller (32) is wrapped with a flexible layer (321) that can elastically deform itself, and the pressing roller (32) is in contact with the test tube (5).

6. A test tube label secondary pressing device according to claim 5, characterized in that: A water absorbing roller (33) is rotatably connected inside the outer shell (31), the water absorbing roller (33) and the pressing roller (32) are arranged at a distance, the water absorbing roller (33) is wrapped with a water absorbing layer (331) that can elastically deform itself, and the water absorbing roller (33) is in contact with the test tube (5).

7. The test tube label secondary pressing device according to claim 6, characterized in that: Longitudinal slide grooves (311) are arranged on both sides of the outer shell (31), and a hydraulic rod (34) is arranged inside the outer shell (31). One end of the hydraulic rod (34) is fixed to the top of the outer shell (31), and the other end is used to drive the pressing roller (32) and / or the water absorption roller (33) to perform linear reciprocating motion along the slide groove (311).

8. The test tube label secondary pressing device according to claim 7, characterized in that: The water suction roller (33) comprises a water suction roller column (332), a water suction roller shaft (333) and a water suction roller frame (334) located at both ends of the water suction roller shaft (333); the pressure roller (32) comprises a pressure roller column (322), a pressure roller shaft (323) and a pressure roller frame (324) located at both ends of the pressure roller shaft (323); a connecting rod (35) is provided between the water suction roller frame (334) and the pressure roller frame (324); the connecting rod (35) is used to enable the pressure roller (32) and the water suction roller (33) to move synchronously along the slide groove (311).

9. A test tube label secondary pressing device according to any one of claims 1 to 8, characterized in that: A mounting block (6) is provided between the main frame (1) and the clamping mechanism (3); the mounting block (6) is integrally connected to the main frame (1); and the mounting block (6) and the clamping mechanism (3) are detachably connected.

10. The test tube label secondary pressing device according to claim 6, characterized in that: The driving mechanism (4) further comprises a pressure roller motor (43), and the pressure roller motor (43) is drivingly connected to the pressure roller (32) and / or the water absorption roller (33).

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