Automatic paper tape rewinding machine
By using a photoelectric control device to detect the lifting height of the paper tape, the problem of excessive paper tape tension in traditional mechanical pressure-type rewinding machines is solved, achieving more precise automatic control and ensuring print quality.
Patent Information
- Application Number
- CN202520083714.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-01-14
AI Technical Summary
Traditional mechanical pressure roller automatic paper tape rewinding machines require the paper tape to be raised to a relatively high height before triggering the rewinding stop, resulting in excessive paper tape tension, which affects print quality and printer lifespan.
A photoelectric control device is used, which causes the paper tape to bend naturally under its own weight and reflect photoelectric signals through the first positioning shaft. The drive device stops running when the paper tape is lifted to avoid excessive tension.
It achieves more precise automatic control, reduces paper tape tension, ensures print quality, and extends the printer's lifespan.
Smart Images
Figure CN223645947U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rewinding machine technology, and in particular to an automatic paper tape rewinding machine. Background Technology
[0002] An automatic paper tape rewinder is a waste paper tape recycling mechanism connected to paper tape output equipment such as label printers. After printing labels, the label printer feeds out the paper tape, and after the operator removes the labels, the rewinder winds up and recycles the waste paper tape. Because there is usually a speed difference between the printer's paper tape feed speed and the rewinder's winding speed, and because the printer may run out of paper, the paper tape can sometimes be stretched taut, affecting print quality, such as skewed or misaligned printing.
[0003] The traditional solution uses a mechanical pressure roller structure. The two ends of the printed label tape are connected to the label printer and the rewinder, respectively, and a movable pressure roller is located above the tape. When the paper is fully wound, the tape is tightened by the printer and rewinder. The tape, which would normally hang downwards, is pulled too high, causing the pressure roller on top to also rise. Once it reaches a certain height, a switch is triggered, shutting off the rewinder. When more paper is printed, the pressure roller lowers, the contact switch automatically springs back, and rewinding begins.
[0004] However, while mechanical pressure rollers can achieve automatic rewinding, they also have obvious drawbacks. The pressure roller is quite heavy, and before it can be turned off, the paper tape needs to be pulled up to a high height by the printer and rewinder located at both ends before the pressure roller can be lifted. At this time, the paper tape is pulled very tightly and the tension is large. Correspondingly, the tension applied to the printer is also large, which can easily affect the paper output speed of the printer (especially printers with lower quality), and ultimately affect the print quality and the lifespan of the printer.
[0005] Therefore, it is necessary to provide an automatic paper tape rewinding machine to overcome the above-mentioned defects. Utility Model Content
[0006] The purpose of this invention is to provide an automatic paper tape rewinder, which aims to improve the problem that existing mechanical pressure rollers require the paper tape to be raised to a high height before the rewinding can be triggered and stopped, thereby achieving more precise automatic control and avoiding affecting print quality.
[0007] To achieve the above objectives, this utility model provides an automatic paper tape rewinder for use in connection with a paper tape output device, comprising:
[0008] Frame; the frame is used to be placed near the paper tape output device;
[0009] A rewind shaft, which is mounted on the frame, is used to wind and recycle the paper tape conveyed by the paper tape output device;
[0010] A drive device is used to drive the rewind shaft to rotate;
[0011] The first positioning shaft is located on the frame and is used to support the paper tape before winding.
[0012] The photoelectric control device includes a control board and a light-emitting module and a light-receiving module, both electrically connected to the control board; the light-emitting module is used to emit photoelectric signals toward the paper tape output device;
[0013] When the paper tape between the paper tape output device and the first positioning shaft bends downward to the first position due to its own weight, it can reflect the photoelectric signal so that it can be received by the receiving optical module. At this time, the driving device runs. When the paper tape is pulled up to the second position, the receiving optical module cannot receive the reflected photoelectric signal or the received photoelectric signal is not strong enough. At this time, the control board controls the driving device to stop running.
[0014] In a preferred embodiment, the frame is further provided with a second positioning shaft located above the first positioning shaft, and a gap is formed between the first positioning shaft and the second positioning shaft through which the paper feed tape passes.
[0015] In a preferred embodiment, a reel is provided on the side of the rewind shaft near the frame, the reel being used to abut and limit one end of the cylindrical paper tape wound on the rewind shaft.
[0016] In a preferred embodiment, the photoelectric control device further includes an adjustment module, which is used to adjust the intensity of the photoelectric signal emitted by the light-emitting module and / or adjust the sensitivity threshold of the light-receiving module when receiving the photoelectric signal.
[0017] In a preferred embodiment, the light-emitting module is used to emit photoelectric signals in the horizontal direction toward the paper tape output device. When the lowest point of the paper tape bend is between the first position and the second position, the photoelectric signal reflected by the paper tape can be received by the receiving light module.
[0018] In a preferred embodiment, the light-emitting module is used to emit photoelectric signals toward the paper tape in a vertical direction. When the lowest point of the paper tape bend is located between the first position and the second position, the intensity of the photoelectric signal received by the light-receiving module is greater than a preset sensitivity threshold.
[0019] In a preferred embodiment, the photoelectric control device is fixed to the frame.
[0020] In a preferred embodiment, the photoelectric control device is fixed on the first positioning shaft.
[0021] The automatic paper tape rewinder provided by this utility model uses a first positioning shaft to cause the paper tape to naturally bend downwards due to its own weight, allowing the paper tape to reflect photoelectric signals, which are then received by the receiving optical module. During this time, the drive device continues to operate. When the paper tape is slightly raised, the photoelectric signal will pass directly under the paper tape and will not be received by the receiving optical module, or the received signal strength will be insufficient. At this time, the drive device stops to avoid excessive pulling on the paper tape output device. Compared with the traditional mechanical pressure shaft type, this structure can detect a small lifting height of the paper tape. At this time, the tension on the paper tape is small, which will not have a significant impact on the paper tape output device and ensure printing quality. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of an automatic paper tape rewinder in winding operation in an exemplary embodiment;
[0024] Figure 2 for Figure 1 The diagram shows an automatic paper tape rewinder at the point where winding stops.
[0025] Figure 3 This is a schematic diagram of an automatic paper tape rewinder in winding operation in another exemplary embodiment;
[0026] Figure 4 for Figure 3 The diagram shows an automatic paper tape rewinder at the point where winding stops.
[0027] The following numbers are labeled in the diagram: 100, Automatic paper tape rewinder; 200, Paper tape output device; 300, Paper tape; 10, Frame; 20, Rewind shaft; 21, Reel; 30, Drive device; 40, First positioning shaft; 50, Photoelectric control device; 51, Control board; 52, Light-emitting module; 53, Light-receiving module; 60, Second positioning shaft. Detailed Implementation
[0028] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are merely for explaining the present utility model and are not intended to limit the present utility model.
[0029] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.
[0030] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0031] In an embodiment of this utility model, an automatic paper tape rewinder 100 is provided for connection and use with a paper tape output device 200, such as a printer, to rewind and recycle printed paper tape 300, such as label tape, couplet tape, etc. It should be noted that the portion of the paper tape 300 located between the paper tape output device 200 and the automatic paper tape rewinder 100 will naturally bend downwards due to its own weight, forming an arc (caten). When the two ends of the paper tape 300 are subjected to tension due to insufficient printing paper or inconsistent conveying and winding speeds, the bottom of the arc of the paper tape 300 will rise upwards, and the greater the tension, the higher the bottom of the arc will rise.
[0032] like Figures 1-4 As shown, the automatic paper tape rewinder 100 includes: a frame 10, a rewind shaft 20, a drive device 30, a first positioning shaft 40, and a photoelectric control device 50.
[0033] The frame 10 is placed near the paper tape output device 200 and spaced apart to form a space for the paper tape 300 to hang down and for easy removal of printed labels. The frame 10 can be a rectangular shell or frame structure, mainly serving to support the carrier.
[0034] The rewind shaft 20 is mounted on the frame 10 and is used to wind the paper tape 300 conveyed by the paper tape output device 200. The drive device 30 is used to drive the rewind shaft 20 to rotate. The drive device 30 can be a rotary cylinder, a motor, etc., and can be connected to the rewind shaft 20 through a transmission structure such as gears and pulleys (not shown in the figure), thereby driving the rewind shaft 20 to rotate around its own central axis, and thus wind the paper tape 300.
[0035] The first positioning shaft 40 is mounted on the frame 10 and is used to support the paper tape 300 before winding. That is, before the hanging paper tape 300 is wound by the rewind shaft 20, it will turn on the upper side of the first positioning shaft 40, so that even if the radius of the cylinder of the paper tape on the rewind shaft 20 (hereinafter referred to as the paper tape cylinder) changes, it will not affect the bending arc of the paper tape 300 between the paper tape output device 200 and the first positioning shaft 40.
[0036] Furthermore, the frame 10 is also provided with a second positioning shaft 60 located above the first positioning shaft 40. A gap is formed between the first positioning shaft 40 and the second positioning shaft 60 for the paper tape 300 to pass through. Therefore, even when the highest point of the paper tape cylinder on the rewind shaft 20 exceeds the height of the first positioning shaft 40, the upper side of the paper tape 300 will abut against the lower side of the second positioning shaft 60 under the limiting and guiding action of the second positioning shaft 60, thereby preventing the paper tape 300 from being lifted by the paper tape cylinder.
[0037] The photoelectric control device 50 is fixed to the frame 10, for example, it can be located below the first positioning axis 40, and includes a control board 51 and light-emitting modules 52 and light-receiving modules 53, both of which are electrically connected to the control board 51. The control board 51 can be a conventional electronic device with data processing capabilities and automatic control, such as a processor, microprocessor, single-chip microcomputer, or chip. In addition, the photoelectric control device 50 can also be fixed to the first positioning axis 40.
[0038] In the first implementation, such as Figure 1 and Figure 2 As shown, the light-emitting module 52 is used to emit photoelectric signals horizontally toward the paper tape output device 200. The first position is defined as the lowest point where the paper tape 300 hangs naturally, and the second position is defined as a new lowest point where the paper tape 300 is raised and cannot be detected by the photoelectric control device 50. When there is a curved paper tape 300 directly in front of the light-emitting module 52, the lowest point of the paper tape 300 is between the first and second positions (inclusive). The paper tape 300 will reflect the photoelectric signal, which will then be received by the receiving light module 53.
[0039] In the second implementation, such as Figure 3 and Figure 4 As shown, the light-emitting module 52 is used to emit photoelectric signals towards the paper tape 300 in a vertical direction. The first position is defined as the lowest point where the paper tape 300 hangs naturally, and the second position is defined as a new lowest point where the paper tape 300 is raised and cannot be detected by the photoelectric control device 50. When the lowest point of the paper tape 300's bend is between the first and second positions, the intensity of the photoelectric signal reflected downwards by the paper tape 300 is relatively high. That is, the intensity of the photoelectric signal received by the receiving light module 53 is greater than a preset sensitivity threshold, at which point a control command to the driving device 30 can be triggered.
[0040] In this embodiment, the photoelectric switch formed by the light-emitting module 52 and the light-receiving module 53 can be a reflective photoelectric switch, which works by detecting the light reflected back from an object. Its implementation principle and specific structure can be found in the prior art and will not be described in detail here. Preferably, the reflective photoelectric switch is a diffuse reflection photoelectric switch, thereby detecting any object that can reflect light, and is suitable for rough surfaces, objects with various surfaces and shapes.
[0041] like Figure 1 As shown, when the paper tape 300 between the paper tape output device 200 and the first positioning shaft 40 bends downward due to its own weight, it can reflect the photoelectric signal so that it can be received by the receiving optical module 53. At this time, the drive device 30 runs, driving the rewind shaft 20 to rotate continuously. Figure 2 As shown, when the paper tape 300 is pulled and lifted, the lowest point of the paper tape 300 is already higher than the position of the photoelectric signal. At this time, the receiving optical module 53 will not receive the reflected photoelectric signal or the received photoelectric signal strength is insufficient (the photoelectric signal may be reflected back from a distant object and received, but because the distance is far, the signal strength is already below the predetermined threshold). The control board 51 controls the drive device 30 to stop running until the paper tape output device 200 has paper again, causing the paper tape 300 to fall in an arc and block the photoelectric signal.
[0042] It should be noted that, for the purpose of clearly demonstrating the working principle of this mechanism, an appendix is attached. Figure 1 and Figure 2 The curvature of the paper tape in the image is slightly exaggerated and does not represent the actual drooping of the paper tape.
[0043] In order to prevent the photoelectric signal emitted by the light-emitting module 52 from being reflected by the paper tape output device 200 on the opposite side and received by the receiving light module 53, the power of the light-emitting module 52 can be preset or a light-emitting module 52 with a predetermined power can be set so that the emitted photoelectric signal within a limited distance (e.g., 30cm, where the distance between the paper tape 300 and the receiving light module 53 is less than the limited distance) will trigger the control action of the control board 51.
[0044] Furthermore, the photoelectric control device 50 also includes an adjustment module (not shown in the figure). The adjustment module is used to adjust the intensity of the photoelectric signal emitted by the light-emitting module 52 and / or adjust the sensitivity threshold of the light-receiving module 53 when receiving the photoelectric signal. Therefore, when it is necessary to adjust the distance between the paper tape output device 200 and the rewind shaft 20, the power of the light-emitting module 52 can be directly adjusted, or the sensitivity threshold of the light-receiving module 53 can be adjusted (i.e., the more sensitive the light-receiving module 53 is, the longer the paper tape 300 distance it can detect), thus avoiding false triggering.
[0045] In one embodiment, the rewind shaft 20 is also provided with a reel 21 on the side near the frame 10. The reel 21 is a vertically placed disc that can rotate synchronously with the rewind shaft 20, thereby abutting and limiting one end of the cylindrical paper tape wound on the rewind shaft 20, improving the neatness of the paper tape 300 during winding.
[0046] In summary, the automatic paper tape rewinder 100 provided by this utility model uses a first positioning shaft 40 to cause the paper tape 300 to naturally bend downwards due to its own weight, allowing the paper tape 300 to reflect photoelectric signals, which are then received by the receiving optical module 53. At this time, the drive device 30 continues to operate. When the paper tape 300 is slightly raised, the photoelectric signal will pass directly under the paper tape 300 and will not be received by the receiving optical module 53, or the received signal strength will be insufficient. At this time, the drive device 30 stops to avoid excessive pulling on the paper tape output device 200. Compared with the traditional mechanical pressure shaft type, this structure can detect a small lifting height of the paper tape. At this time, the tension on the paper tape 300 is small, so it will not have a significant impact on the paper tape output device 200, thus ensuring printing quality.
[0047] This invention is not limited to the description in the specification and embodiments. Therefore, other advantages and modifications can be readily realized by those skilled in the art. Thus, without departing from the spirit and scope of the general concept as defined by the claims and their equivalents, this invention is not limited to the specific details, representative devices and illustrated examples shown and described herein.
Claims
1. An automatic paper tape rewinder, used in connection with a paper tape output device, characterized in that, include: Frame; the frame is used to be placed near the paper tape output device; A rewind shaft, which is mounted on the frame, is used to wind and recycle the paper tape conveyed by the paper tape output device; A drive device is used to drive the rewind shaft to rotate; The first positioning shaft is located on the frame and is used to support the paper tape before winding. A photoelectric control device, comprising a control board and a light-emitting module and a light-receiving module, both electrically connected to the control board; the light-emitting module is used to send photoelectric signals to the paper tape output device. When the paper tape between the paper tape output device and the first positioning shaft bends downward to the first position due to its own weight, it can reflect the photoelectric signal so that it can be received by the receiving optical module. At this time, the driving device runs. When the paper tape is pulled up to the second position, the receiving optical module cannot receive the reflected photoelectric signal or the received photoelectric signal is not strong enough. At this time, the control board controls the driving device to stop running.
2. The automatic paper tape rewinder as described in claim 1, characterized in that, The frame is also provided with a second positioning shaft located above the first positioning shaft, and a gap is formed between the first positioning shaft and the second positioning shaft through which the paper feed tape passes.
3. The automatic paper tape rewinder as described in claim 1, characterized in that, The rewind shaft is also provided with a reel on the side near the frame, and the reel is used to abut and limit one end of the cylindrical paper tape wound on the rewind shaft.
4. The automatic paper tape rewinder as described in claim 1, characterized in that, The photoelectric control device further includes an adjustment module, which is used to adjust the intensity of the photoelectric signal emitted by the light-emitting module and / or adjust the sensitivity threshold of the light-receiving module when receiving the photoelectric signal.
5. The automatic paper tape rewinder as described in claim 1, characterized in that, The light-emitting module is used to emit photoelectric signals in the horizontal direction toward the paper tape output device. When the lowest point of the paper tape bend is between the first position and the second position, the photoelectric signal reflected by the paper tape can be received by the receiving light module.
6. The automatic paper tape rewinder as described in claim 1, characterized in that, The light-emitting module is used to emit photoelectric signals toward the paper tape in a vertical direction. When the lowest point of the paper tape bend is between the first position and the second position, the intensity of the photoelectric signal received by the receiving light module is greater than a preset sensitivity threshold.
7. The automatic paper tape rewinder as described in claim 1, characterized in that, The photoelectric control device is fixed to the frame.
8. The automatic paper tape rewinder as described in claim 1, characterized in that, The photoelectric control device is fixed on the first positioning shaft.