A transparent paper material residual amount detection device

Abstract

The present application belongs to the technical field of performance improvement of cigarette packaging equipment, and provides a transparent paper material surplus amount detection device, which comprises a mounting base, a swing shaft rotatably mounted on the mounting base and horizontally penetrating the front and back surfaces of the mounting base, a swing arm with one end fixedly connected with the swing shaft and the other end provided with a pressing member for abutting against the surface of the transparent paper material, a transmission arm with one end fixedly connected with the swing shaft, an elastic reset element for providing a pre-tightening force for making the pressing member tightly adhere to the surface of the transparent paper material, and an angle sensing mechanism comprising a shaft encoder and a transmission assembly, which is transmissionally connected between the swing shaft and the shaft encoder to transmit the rotation of the swing shaft to the shaft encoder, wherein the angle sensing mechanism is used for outputting a signal corresponding to the swing angle of the swing arm to complete the detection of the surplus amount of the transparent paper material. The present application can avoid the problem of inaccurate control of the surplus amount of the transparent paper by the original YB55 packaging machine proximity switch signal.

Description

Technical Field

[0001] This application relates to the technical field of performance improvement of cigarette packaging equipment, and in particular to a device for detecting the remaining amount of transparent paper material. Background Technology

[0002] The YB55 outer transparent paper packaging machine is an auxiliary machine of the ZB45 unit, manufactured and sold by Shanghai Tobacco Industry Machinery Plant based on the technology transferred by Italy's GD company, and digested and absorbed by China National Tobacco Import & Export Corporation. Its designed production capacity is 400 packs / min. The ZB45 model has mature design technology and operates efficiently and stably, and is currently widely used in the cigarette industry. In actual production, the transparent paper auxiliary material should be replaced before it runs out. Operators need to pay special attention to the remaining amount of small packs of transparent paper packaging material. Distractions can affect the operation and quality stability of the equipment. Slight negligence can lead to the depletion of transparent paper, causing equipment downtime and product quality defects.

[0003] Currently, various devices exist for detecting the remaining amount of transparent paper, but none can effectively solve the problem of insufficient accuracy in detecting this amount. For example, patent application CN116253003A discloses a transparent paper packaging machine for soft cigarette packs, including: a packaging machine base, a transparent paper roll back plate, a photoelectric sensor, a paper holder, and a transparent paper remaining amount detection structure; two paper holders are set at a preset angle at the upper and lower parts of the packaging machine base; the transparent paper roll is installed on the paper holder; the photoelectric sensor is installed on the packaging machine base; one end of the transparent paper remaining amount detection structure is installed on the packaging machine base, and the other end contacts the transparent paper roll. This solution can detect the gap between the transparent paper roll and the transparent paper roll back plate. When the gap is too large, it reminds the operator to tighten the transparent paper to prevent the transparent paper from deviating after the transparent paper roll detaches from the back plate, thus avoiding quality defects in the transparent paper of small cigarette packs and reducing potential quality risks; it also avoids rejecting unqualified cigarette packs after the transparent paper roll detaches, and reduces quality traceability after transparent paper quality defects, saving production costs and labor intensity. However, the detection accuracy of this solution is not high enough because photoelectric sensors are mostly used to determine whether the gap exceeds a certain set value. This is a switch quantity / threshold detection, which is difficult to accurately reflect the continuous change in radius of the transparent paper roll during consumption. Therefore, it cannot achieve high-resolution quantification of the remaining amount.

[0004] For example, patent CN223443965U discloses a device for detecting the remaining amount of transparent paper rolls in tobacco cartons. The automatic stop detection bracket for the transparent paper roll has a sliding detection mechanism inside. This mechanism includes a distance sensor, a slide bar seat, double slide bars, and a mounting panel. The double slide bars are fixedly mounted on the automatic stop detection bracket, and a slide bar seat is slidably mounted on the side wall of the double slide bars. The side wall of the slide bar seat is on the side wall of the mounting panel, which is fixedly mounted on the side wall of the distance sensor. When the radius of the transparent paper roll in the carton drops to the minimum safety margin, the distance sensor generates a corresponding electrical signal, controlling the packaging machine to stop and issuing a warning to the operator, reminding them to replace the material. The entire device is sensitive and rapid, capable of real-time detection of the remaining transparent paper roll amount. Before the material runs out, it promptly warns the operator to replace the transparent paper roll, thereby reducing material waste and corresponding downtime, effectively reducing the replacement time of the transparent paper roll, and improving equipment operating efficiency. However, this solution uses a distance sensor, which is more suitable for position / threshold detection than for long-term, continuous, millimeter-level or even sub-millimeter-level high-precision quantification. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a transparent paper material balance detection device, which can avoid the inaccuracy problem of the original YB55 packaging machine's proximity switch signal control of transparent paper balance.

[0006] To achieve the above and related objectives, the present invention provides a transparent paper material remaining quantity detection device, comprising:

[0007] The mounting base has a front side for mounting at least two transparent paper trays for holding transparent paper material;

[0008] The swing shaft is rotatably mounted on the mounting base and extends laterally through the front and back of the mounting base;

[0009] The swing arm has one end fixedly connected to the swing shaft on the side of the mounting base, and the other end is provided with a clamping part for abutting against the surface of the transparent paper material.

[0010] The transmission arm has one end fixedly connected to the swing shaft on the side of the mounting base.

[0011] An elastic reset element, connected between the other end of the transmission arm and the back of the mounting base, is used to provide a pre-tightening force to make the clamping element press tightly against the surface of the transparent paper material;

[0012] An angle sensing mechanism, located on the back of the mounting base, includes a shaft encoder and a transmission assembly. The transmission assembly is connected between the swing shaft and the shaft encoder to transmit the rotation of the swing shaft to the shaft encoder.

[0013] The angle sensing mechanism is used to output a signal corresponding to the swing angle of the swing arm in order to detect the remaining amount of transparent paper material.

[0014] Furthermore, the transmission assembly includes a drive pulley that is rotatably mounted on the swing shaft, a driven pulley that is rotatably mounted on the shaft encoder shaft, and a synchronous belt surrounding the drive pulley and the driven pulley.

[0015] Furthermore, it also includes a tensioner pulley, the outer circumference of which abuts against the timing belt.

[0016] Furthermore, a metal detection block is fixed on the synchronous belt.

[0017] Furthermore, a first bracket is fixedly mounted on the back of the mounting base, and a proximity switch is mounted on the first bracket. The proximity switch is positioned close to the synchronous belt and is used to detect metal detection blocks.

[0018] Furthermore, the elastic reset element is a tension spring.

[0019] Furthermore, it also includes a fixing rod, one end of which is fixedly connected to the back of the mounting base, and the other end is connected to an elastic reset element.

[0020] Furthermore, it also includes a second bracket fixedly mounted on the back of the mounting base, on which the shaft encoder is mounted.

[0021] Furthermore, a front fixing frame and a rear fixing frame are provided on the front of the mounting base, and a transparent paper tray is installed between the front fixing frame and the rear fixing frame.

[0022] Furthermore, it also includes a control unit, which is connected to the shaft encoder signal.

[0023] The beneficial technical effects of this invention are as follows:

[0024] This invention utilizes the coordinated transmission action of a swing arm, a swing shaft, a transmission assembly, an elastic reset element, a transmission arm, and a shaft encoder to convert the radius change of the transparent paper material into a high-precision pulse signal that can be output by the shaft encoder, thereby achieving accurate detection of the remaining amount of the transparent paper material and having the advantage of high detection accuracy.

[0025] The present invention provides a pre-tightening force through an elastic reset element, which enables the clamping member to remain tightly attached even when the radius of the transparent paper material decreases. This adapts to the radius changes during the continuous consumption of the transparent paper material, reduces instantaneous detachment / jumping caused by vibration, inertia, or non-roundness of the paper roll, and thus improves detection stability.

[0026] The shaft encoder of this invention is connected to the control unit via signal, which can realize automated alarm / trigger, improve the automation level of the device, reduce manual reliance, and improve the stability of continuous operation.

[0027] The present invention has a compact structure, high reliability, high functional integration, and is easy to assemble and maintain.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0029] The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without inventive effort. In the drawings:

[0030] Figure 1 This is a schematic diagram of the transparent paper material balance detection device of this application;

[0031] Figure 2 This is a schematic diagram of the back structure of the mounting substrate for this application;

[0032] Figure 3 This is a schematic diagram of the front structure of the mounting base for this application.

[0033] Figure Labels

[0034] 1: Clamping component; 2: Swing arm; 3: Swing shaft; 4: Transmission arm; 5: Elastic reset element; 6: Driving pulley; 7: Driven pulley; 8: Shaft encoder; 9: Synchronous belt; 10: Metal detection block; 11: Tensioning wheel; 12: Proximity switch; 13: First bracket; 14: Second bracket; 15: Mounting base; 16: Rotating rod; 17: Rear fixing bracket; 18: Front fixing bracket; 19: Transparent paper tray; 20: Fixing rod. Detailed Implementation

[0035] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should be understood that certain features of the invention (described in the context of separate embodiments for clarity) may also be provided in a single embodiment. Conversely, multiple features of the invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of the invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The invention is further illustrated below by specific examples; however, it should be noted that the specific process conditions and results described in the embodiments of the invention are merely illustrative and should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be covered within the scope of protection of the invention.

[0036] like Figures 1 to 3 As shown, this application provides a transparent paper material surplus detection device, comprising:

[0037] Mounting base 15, the front of which is used to mount at least two transparent paper trays 19 for holding transparent paper material;

[0038] The swing shaft 3 is rotatably mounted on the mounting base 15 and extends laterally through the front and back of the mounting base 15.

[0039] The swing arm 2 has one end fixedly connected to the swing shaft 3 on one side of the front of the mounting base 15, and the other end is provided with a clamping member 1 for abutting against the surface of the transparent paper material.

[0040] The transmission arm 4 is fixedly connected at one end to the swing shaft 3 on the side of the back of the mounting base 15;

[0041] The elastic reset element 5 is connected between the other end of the transmission arm 4 and the back of the mounting base 15 to provide a pre-tightening force that makes the clamping member 1 press tightly against the surface of the transparent paper material.

[0042] An angle sensing mechanism, located on the back of the mounting base 15, includes a shaft encoder 8 and a transmission assembly. The transmission assembly is connected between the swing shaft 3 and the shaft encoder 8 to transmit the rotation of the swing shaft 3 to the shaft encoder 8.

[0043] The angle sensing mechanism is used to output a signal corresponding to the swing angle of the swing arm 2 in order to detect the remaining amount of transparent paper material.

[0044] Furthermore, such as Figure 3 As shown, the mounting base 15 of this application has a front fixing frame 18 and a rear fixing frame 17 on its front side, and the transparent paper roll 19 is installed between the front fixing frame 18 and the rear fixing frame 17. Furthermore, the device of this application also includes a rotating rod 16 rotatably mounted on the mounting base 15. The rotating rod 16 is used to pass through the core hole of the transparent paper material (usually a transparent paper roll), serving as the rotation center axis and support axis of the paper roll, around which the transparent paper roll can rotate; simultaneously, the rotating rod 16 cooperates with the front fixing frame 18 and the rear fixing frame 17 to achieve radial support and axial positioning. Preferably, one end of the rotating rod 16 is detachable, allowing the empty core to be removed or a full roll to be installed when changing rolls. In this case, the front fixing frame 18 and the rear fixing frame 17 provide the mounting reference.

[0045] Furthermore, such as Figure 1 and Figure 3As shown, this application has two transparent paper trays 19, one being the in-use tray and the other a spare tray. The left and right swinging of the swing arm 2 allows the clamping member 1 to be placed on the in-use tray and the spare tray respectively. The clamping member 1 can be a clamping roller, and its material can be wear-resistant rubber, polyurethane, or engineering plastic to ensure contact with the transparent paper roll surface while reducing relative sliding friction and accommodating minor non-roundness of the transparent paper roll surface. The clamping member 1 abuts against the surface of the transparent paper roll with a certain pre-tightening force. When the radius of the transparent paper roll gradually decreases due to continuous consumption during the operation of the packaging machine, the swing arm 2 will deflect accordingly around the swing axis 3. Conversely, if the radius of the transparent paper roll increases (after replacing the paper roll), the swing arm 2 will deflect in the opposite direction. Furthermore, the fixed connection between the swing arm 2 and the swing axis 3 ensures that the swing angle of the swing arm 2 is completely consistent with the rotation angle of the swing axis 3, thereby allowing the deflection of the swing arm 2 to accurately reflect the change in the radius of the transparent paper roll.

[0046] Furthermore, such as Figure 1 and Figure 2 As shown, the mounting base 15 of this application has a shaft hole at the position corresponding to the swing shaft 3. The swing shaft 3 is supported in the shaft hole by a bearing, allowing it to rotate freely. The axis of the swing shaft 3 is preferably parallel to the axis of the transparent paper roll 19, so that the swing arm 2 can effectively follow the movement on the outside of the transparent paper roll, thereby causing the swing shaft 3 to rotate. In addition, the transmission arm 4 and the swing arm 2 are located on opposite sides of the swing shaft 3, and move synchronously only through the rotation of the swing shaft 3. The transmission arm 4 serves as the force fulcrum of the elastic reset element 5. When the radius of the transparent paper roll decreases, the swing arm 2 drives the swing shaft 3 to rotate, and the transmission arm 4 rotates accordingly. The elastic reset element 5 is stretched / or compressed, and its elastic force always drives the transmission arm 4 to rotate in the opposite direction. Thus, the swing shaft 3 drives the swing arm 2 to keep the clamping member 1 in contact with the surface of the transparent paper roll.

[0047] Furthermore, such as Figure 1 and Figure 2As shown, the transmission assembly of this application includes a drive pulley 6 synchronously rotatably mounted on a swing shaft 3, a driven pulley 7 synchronously rotatably mounted on the shaft of a shaft encoder 8, and a synchronous belt 9 surrounding the drive pulley 6 and the driven pulley 7. Furthermore, the drive pulley 6 can be mounted on the swing shaft 3 via a key connection or other means. When the radius of the transparent paper roll changes, causing the swing arm 2 to swing around the swing shaft 3, the rotation of the swing shaft 3 is directly transmitted to the drive pulley 6, causing the drive pulley 6 to rotate proportionally to the swing angle of the swing arm 2. The driven pulley 7 can be connected to the shaft of the shaft encoder 8 via a key connection or other means to ensure no relative rotation between the two, thus allowing the shaft encoder 8 to receive rotational motion from the driven pulley 7. The synchronous belt 9 surrounds and engages between the drive pulley 6 and the driven pulley 7, forming a closed transmission circuit. The synchronous belt 9 is preferably a toothed synchronous belt 9 to engage with the tooth grooves on the pulleys, preventing slippage and ensuring the accuracy of the transmission ratio and the synchronicity of the movement. Preferably, this application further includes a tensioning pulley 11, the outer circumferential surface of which abuts against the synchronous belt 9 to apply appropriate tension to the synchronous belt 9. By adjusting the position of the tensioning pulley 11, the slack of the synchronous belt 9 during use can be compensated, and transmission errors caused by slippage or jumping of the synchronous belt 9 can be avoided, thereby improving the reliability of the output signal of the shaft encoder 8.

[0048] Furthermore, a metal detection block 10 is fixed on the synchronous belt 9. A first bracket 13 is fixedly mounted on the back of the mounting base 15, and a proximity switch 12 is mounted on the first bracket 13. The proximity switch 12 is positioned close to the synchronous belt 9 and is used to detect the metal detection block 10. Even further, the sensing end of the proximity switch 12 faces the synchronous belt 9, and its position corresponds to the movement trajectory of the metal detection block 10. During operation, when the transparent paper roll is in normal consumption, the synchronous belt 9 rotates cyclically with the rotation of the swing shaft 3, and the metal detection block 10 periodically passes through the sensing area of ​​the proximity switch 12 along with the synchronous belt 9. When the unit needs to switch paper reels (e.g., from the in-use paper reel to the spare paper reel), the tension state of the transparent paper roll changes specifically, and the timing of the signal generated by the metal detection block 10 passing through the proximity switch 12 changes accordingly. The proximity switch 12 transmits the detected switching signal to the control unit in real time. By analyzing the signal, the control unit can accurately determine whether the transparent paper tray 19, which is currently in operation, has switched. This allows for automatic calibration of the reference parameters in subsequent margin calculations, avoiding false alarms or missed alarms caused by paper tray switching.

[0049] Furthermore, such as Figure 1As shown, the elastic reset element 5 in this application is a tension spring. This application also includes a fixing rod 20, one end of which is fixedly connected to the back of the mounting base 15, and the other end is connected to the elastic reset element 5. When the transparent paper roll is consumed and its radius decreases, the clamping member 1 moves downward, the swing arm 2 swings, and then drives the swing shaft 3 and the transmission arm 4 to rotate together. At this time, the free end of the transmission arm 4 will pull the tension spring, causing it to extend and the preload to increase. The tension spring always has a pull-back preload, which will act in the opposite direction on the transmission arm 4, the swing shaft 3, the swing arm 2 and the clamping member 1, ensuring that the clamping member 1 is always in close contact with the surface of the transparent paper roll and will not have gaps or detach due to the reduction of its radius.

[0050] Furthermore, such as Figure 1 and Figure 2 As shown, this application also includes a second bracket 14 fixedly mounted on the back of the mounting base 15, and the shaft encoder 8 is mounted on the second bracket 14.

[0051] Furthermore, this application also includes a control unit, which is connected to the shaft encoder 8 via signal connection. Preferably, the control unit of this application is a small PLC controller, used to receive the rotation signal of the shaft encoder 8 and the sensing signal of the proximity switch 12, and output splicing and alarm signals after PLC logic operations.

[0052] Furthermore, the working principle of the device in this application is as follows:

[0053] After the packaging machine starts or completes a roll change, the transparent paper roll is in a fully wound state, with its cross-sectional radius at its maximum. At this time, the clamping member 1 is tightly pressed against the surface of the transparent paper roll under the preload of the tension spring, and the swing arm 2 is in the initial deflection angle position. At this time, the shaft encoder 8 outputs an initial pulse signal corresponding to the initial deflection angle, and the control unit records this signal as the reference value for the margin calculation.

[0054] As the packaging machine moves, the transparent paper is continuously consumed, and the radius of the transparent paper roll gradually decreases. During this process, since the tension spring always provides a pull-back preload, it will act in the opposite direction on the transmission arm 4, swing shaft 3, swing arm 2 and pressing component 1, ensuring that the pressing component 1 is always in close contact with the surface of the transparent paper roll, thus realizing the follow-up tracking of the change in the radius of the transparent paper roll.

[0055] The swing arm 2 drives the swing shaft 3 to rotate synchronously, and transmits the rotation to the shaft encoder 8 through the transmission component. The shaft encoder 8 outputs a high-precision pulse signal that is proportional to the swing angle. This signal actually reflects the remaining amount of transparent paper roll.

[0056] The control unit collects the pulse signal emitted by the shaft encoder 8 in real time and performs the following processing: calculates the actual deflection angle of the swing arm 2 based on the pulse count; calculates the cross-sectional radius or remaining length of the current transparent paper roll by combining the pre-calibrated geometric parameters; and compares the margin value with the preset critical value (e.g., the safety margin corresponding to the need to replace the transparent paper roll in advance).

[0057] When the control unit determines that the remaining amount of the transparent paper roll has reached or fallen below the preset threshold, it immediately performs the following operations: outputs a trigger signal to the unit control system; controls the audible and visual alarm or pops up a prompt on the human-machine interface to promptly remind the unit operators to replace the transparent paper roll.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A device for detecting the remaining amount of transparent paper material, characterized in that, include: Mounting base (15), the front side of which is used to mount at least two transparent paper trays (19) for placing transparent paper material. The swing shaft (3) is rotatably mounted on the mounting base (15) and extends laterally through the front and back of the mounting base (15); The swing arm (2) has one end fixedly connected to the swing shaft (3) on the side of the front of the mounting base (15), and the other end is provided with a clamping member (1) for abutting against the surface of the transparent paper material. The transmission arm (4) is fixedly connected at one end to the side of the swing shaft (3) located on the back of the mounting base (15); The elastic reset element (5) is connected between the other end of the transmission arm (4) and the back of the mounting base (15) to provide a pre-tightening force to make the clamping member (1) stick tightly to the surface of the transparent paper material; An angle sensing mechanism is located on the back of the mounting base (15) and includes a shaft encoder (8) and a transmission assembly. The transmission assembly is connected between the swing shaft (3) and the shaft encoder (8) to transmit the rotation of the swing shaft (3) to the shaft encoder (8). The angle sensing mechanism is used to output a signal corresponding to the swing angle of the swing arm (2) to complete the detection of the remaining amount of transparent paper material.

2. The apparatus according to claim 1, characterized in that, The transmission assembly includes a drive pulley (6) that is rotatably mounted on the swing shaft (3), a driven pulley (7) that is rotatably mounted on the shaft encoder (8), and a synchronous belt (9) surrounding the drive pulley (6) and the driven pulley (7).

3. The apparatus according to claim 2, characterized in that, It also includes a tensioner (11), the outer circumferential surface of which abuts against the timing belt (9).

4. The apparatus according to claim 2, characterized in that, A metal detection block (10) is fixed on the synchronous belt (9).

5. The apparatus according to claim 4, characterized in that, The mounting base (15) has a first bracket (13) fixedly mounted on its back. A proximity switch (12) is mounted on the first bracket (13) and the proximity switch (12) is positioned close to the synchronous belt (9) for detecting the metal detection block (10).

6. The apparatus according to claim 1, characterized in that, The elastic reset element (5) is a tension spring.

7. The apparatus according to claim 6, characterized in that, It also includes a fixing rod (20), one end of which is fixedly connected to the back of the mounting base (15), and the other end is connected to the elastic reset element (5).

8. The apparatus according to claim 1, characterized in that, It also includes a second bracket (14) fixedly mounted on the back of the mounting base (15), and the shaft encoder (8) is mounted on the second bracket (14).

9. The apparatus according to claim 1, characterized in that, The mounting base (15) is provided with a front fixing frame (18) and a rear fixing frame (17) on its front side, and the transparent paper tray (19) is installed between the front fixing frame (18) and the rear fixing frame (17).

10. The apparatus according to claim 1, characterized in that, It also includes a control unit, which is signal-connected to the shaft encoder (8).

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