Extrusion shaft structure of banner printer

Abstract

The utility model belongs to the field of printers, and relates to an extrusion shaft structure of a banner printer, which comprises a printing head, a rubber roller below the printing head and an extrusion shaft used for supporting the rubber roller, two ends of the extrusion shaft are rotatably connected with bearing seats, a sliding block is fixedly connected below the bearing seats, a sliding rail is connected below the sliding block in a sliding manner, and the sliding rail is connected with the printing head. A rack is fixedly connected to the side, away from the extrusion shaft, of the bearing seat, the rack is meshed with a gear, and the gear is fixedly connected with a servo motor used for driving the extrusion shaft to be close to or away from the rubber roller. The banner cloth is pressed on the rubber roller by the extrusion shaft, and the banner cloth passes through the rubber roller and the extrusion shaft in an S shape, so that larger friction force is generated between the rubber roller and the banner cloth, and the banner cloth is prevented from slipping.

Description

Technical Field

[0001] The utility model belongs to the field of printers and relates to an extrusion shaft structure of a banner printer. Background Art

[0002] In the existing banner printer, when printing a banner, the banner cloth needs to be passed between the print head and the rubber roller, and the print head is used to press the banner cloth onto the rubber roller. After the friction force is generated between the rubber roller and the banner cloth, the rotation of the rubber roller can drive the banner cloth to move. However, this structure has a defect: because the contact area between the banner cloth and the rubber roller is small, the friction force generated is limited, so the banner will slip and other problems will occur, resulting in poor banner printing effect and affecting the aesthetics of banner printing. Utility Model Content

[0003] In view of the above problems, the utility model provides an extrusion shaft structure of a banner printer which can prevent the banner cloth from slipping.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is an extrusion shaft structure of a banner printer, including a print head, a rubber roller under the print head, and an extrusion shaft for supporting the rubber roller, wherein the two ends of the extrusion shaft are rotatably connected with bearing seats, a slider is fixedly connected under the bearing seat, a slide rail is slidably connected under the slider, a rack is fixedly connected to the side of the bearing seat away from the extrusion shaft, the rack is meshed with a gear, and the gear is fixedly connected to a servo motor for driving the extrusion shaft to approach or move away from the rubber roller.

[0005] Preferably, a roller for pressing the rack onto the gear is also included.

[0006] Preferably, the extrusion shaft is configured to be hollow.

[0007] Preferably, both ends of the extrusion shaft are connected with rotating joints.

[0008] Preferably, a support frame is fixedly connected below the slide rail.

[0009] Compared with the prior art, the advantages and positive effects of the utility model are:

[0010] The extrusion shaft of the utility model presses the banner cloth onto the rubber roller, and makes the banner cloth pass through the rubber roller and the extrusion shaft in an S shape, so that a greater friction force is generated between the rubber roller and the banner cloth, so as to prevent the banner cloth from slipping.

[0011] The extrusion shaft of the utility model is hollow, and hot water can be passed into the interior to heat the extrusion roller and further heat the rubber roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0013] Figure 1 It is a structural schematic diagram of an extrusion shaft structure of a banner printer;

[0014] Figure 2 for Figure 1 A magnified view of the structure at center;

[0015] Figure 3 It is a schematic diagram of the S-shaped movement path of the banner cloth;

[0016] Figure 4 Schematic diagram of the water circulation system.

[0017] In the above figures, 1. housing; 2. print head; 3. rubber roller; 4. extrusion shaft; 5. bearing seat; 6. slider; 7. slide rail; 8. rack; 9. gear; 10. servo motor; 11. shaft; 12. shaft motor; 13. winding roller; 14. roller; 15. movable slot; 16. support frame; 17. banner cloth; 18. rotary joint; 19. water pump; 20. heating tube. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, an extrusion shaft structure of a banner printer includes a print head 2 arranged in a casing 1 and a rubber roller 3 below the print head 2. In order to prevent the banner cloth 17 from slipping, the utility model also includes an extrusion shaft 4 for supporting the rubber roller 3. The two ends of the extrusion shaft 4 are rotatably connected with bearing seats 5, a slider 6 is fixedly connected below the bearing seat 5, and a slide rail 7 is slidably connected below the slider 6. The slider 6 cooperates with the slide rail 7 to move the slider 6 along a straight line. A rack 8 is fixedly connected to the side of the bearing seat 5 away from the extrusion shaft 4, and the rack 8 is meshed with a gear 9. The gear 9 is fixedly connected to a servo motor 10 for driving the extrusion shaft 4 to approach or move away from the rubber roller 3, and the servo motor 10 is controlled by a PLC controller.

[0021] Specifically, the utility model drives the gear 9 to rotate by the servo motor 10 to move the rack 8 meshing with the gear 9, thereby driving the bearing seat 5 to move. Under the drive of the servo motor 10, the extrusion shaft 4 can approach or move away from the rubber roller 3.

[0022] The method for winding the banner cloth 17 realized by using the structure of the utility model is as follows:

[0023] a: The print head 2 is fixed on the rotating shaft 11, and the rotating shaft 11 is driven by the rotating shaft motor 12, and the rotating shaft motor 12 rotates to lift the print head 2;

[0024] b: The servo motor 10 drives the extrusion shaft 4 away from the rubber roller 3;

[0025] c: Make the initial end of the banner cloth 17 pass between the print head 2 and the rubber roller 3, and then make the initial end of the banner cloth 17 hang downward, drive the print head 2 to press down to press the banner cloth 17 on the rubber roller 3, and at the same time drive the extrusion shaft 4 to move parallel to the bottom of the rubber roller 3. After the extrusion shaft 4 completes the movement, the extrusion shaft 4 and the rubber roller 3 clamp the banner cloth 17, and then make the initial end of the banner cloth 17 be wound around the winding roller 13.

[0026] As a result, the contact area between the banner cloth 17 and the rubber roller 3 is increased, and the friction force becomes greater, thereby preventing the banner cloth 17 from slipping.

[0027] The printer includes a unwinding roller (not shown in the figure) and a winding roller 13, and the banner cloth 17 is unwound from the unwinding roller. Preferably, the print head 2 and the rubber roller 3 are arranged between the unwinding roller and the winding roller 13, so that when the banner cloth 17 contacts the rubber roller 3 until it separates from the extrusion shaft 4, its movement path is S-shaped, so there is also friction between the extrusion shaft 4 and the banner cloth 17, which further prevents the banner cloth 17 from slipping.

[0028] It should be noted that the outermost layer of the rubber roller 3 is a rubber layer. When the extrusion shaft 4 moves to the bottom of the rubber roller 3 , the rubber layer will be deformed while pressing the banner cloth 17 onto the rubber roller 3 , thereby generating the friction force between the extrusion shaft 4 and the banner cloth 17 .

[0029] Furthermore, the utility model also includes a roller 14 for pressing the rack 8 onto the gear 9 to prevent the gear 9 from separating from the rack 8.

[0030] Furthermore, the present invention further comprises a position sensor for detecting the position of the extrusion shaft 4, and the position sensor is arranged above the roller 14. The position sensor is electrically connected to the PLC controller.

[0031] Furthermore, the extrusion shaft 4 is configured to be hollow.

[0032] Furthermore, both ends of the extrusion shaft 4 are connected with rotary joints 18 , and both ends of the casing 1 pass through the casing 1 , and the casing 1 is provided with a movable groove 15 for the extrusion shaft 4 to move.

[0033] Since the print head 2 in the utility model displays the image and text on the banner cloth 17 by heating the banner cloth 17, when the external environment temperature is low, the temperature of the rubber roller 3 is low. When the print head 2 presses the banner cloth 17 on the rubber roller 3 to print, the low-temperature rubber roller 3 will absorb heat, resulting in insufficient printing temperature and poor printing effect. In order to achieve the purpose of heating the rubber roller 3, the rotary joint 18 is used to communicate with the water pipe, and the water pipe is connected to the water tank. A heating pipe 20 is provided in the water tank, and a water pump 19 for driving water to circulate in the extrusion shaft 4 is provided. The above components realize the water circulation function, so that the extrusion shaft 4 can be heated, and the heating of the extrusion shaft 4 can drive the rubber roller 3 to heat up. Therefore, the extrusion shaft 4 in the utility model is pre-set to be hollow, and a movable groove 15 is provided for the extrusion shaft 4 to move.

[0034] Furthermore, a support frame 16 is fixedly connected below the slide rail 7 , and the support frame 16 is fixedly connected to the housing 1 .

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An extrusion shaft structure of a banner printer, comprising a print head and a rubber roller below the print head, characterized in that: It also includes an extrusion shaft for supporting the rubber roller, wherein both ends of the extrusion shaft are rotatably connected to bearing seats, a slider is fixedly connected below the bearing seat, a slide rail is slidably connected below the slider, a rack is fixedly connected to the side of the bearing seat away from the extrusion shaft, the rack is meshed with a gear, and the gear is fixedly connected to a servo motor for driving the extrusion shaft to approach or move away from the rubber roller.

2. The extrusion shaft structure of a banner printer according to claim 1, characterized in that: Also included are rollers for pressing the rack onto the gear.

3. The extrusion shaft structure of a banner printer according to claim 1, characterized in that: The extrusion shaft is configured to be hollow.

4. The extrusion shaft structure of a banner printer according to claim 1, characterized in that: Both ends of the extrusion shaft are connected with rotating joints.

5. The extrusion shaft structure of a banner printer according to claim 1, characterized in that: A support frame is fixedly connected below the slide rail.

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