Bone tie knot detection device for a self-sealing bag

Abstract

The utility model relates to a kind of bone strip knot detection device of self-sealing bag, comprising: first fixed wheel group, second fixed wheel group, lifting wheel group, lifting guide rod and position sensor.First fixed wheel group is equipped with first fixed pulley.Second fixed wheel group is equipped with second fixed pulley.Lifting wheel group includes: slidingly arranged lifting seat and the dynamic pulley installed on lifting seat.Lifting guide rod is threaded in lifting seat.Position sensor is used to detect whether lifting seat is located on preset zero position.Utilize fixed pulley and dynamic pulley to guide the advancing trajectory of material belt, and by detecting the position change of dynamic pulley, whether knot occurs when material belt is output from material box is judged, before material belt is pulled apart, stop detection signal is sent to the control system of suturing machine, improve the security of operation.

Description

Technical Field

[0001] This utility model relates to the technical field of self-sealing bag production equipment, and in particular to a device for detecting the knotting of the ribs in a self-sealing bag. Background Technology

[0002] Self-sealing bags are a common type of storage bag, mainly composed of a bag body and a zipper. When storing items, the items are placed inside the bag body, and the zipper, located at the opening of the bag body, has concave and convex strips. By squeezing the zipper, the concave and convex strips lock together, achieving a self-sealing effect. Currently, there are two main production methods for self-sealing bags: The first method involves simultaneously blowing out material A (for forming the bag body) and material B (for forming the zipper) using a mold on the same production line. Material A and material B are then sewn together at the mold using the adhesion and extrusion force of the materials. The second method involves producing the bag body and zipper separately on two production lines, and then sewing the bag body and zipper together using a sewing machine (e.g., heat pressing or ultrasonic welding).

[0003] In traditional sewing machines, during the process of guiding the strip-shaped bobbin (hereinafter referred to as the bobbin strip) from the feed hopper to the sewing station via guide wheels, there is a risk of knotting in the feed hopper because the bobbin strip is usually placed in rolls or piles. Once the bobbin strip in the feed hopper becomes knotted, the entire bobbin strip will be pulled by the feeding mechanism, which may result in the bobbin strip being torn.

[0004] To address the aforementioned issues, a detection device needs to be developed to detect whether the material strip becomes knotted when it exits the hopper. Before the material strip breaks, a stop detection signal should be sent to the sewing machine's control system to improve operational safety. Utility Model Content

[0005] Based on this, the present invention provides a device for detecting knots in the ribs of a self-sealing bag. It uses fixed pulleys and movable pulleys to guide the forward trajectory of the material belt, and by detecting the position change of the movable pulley, it determines whether knots occur when the material belt is output from the material box. Before the material belt is torn, a stop detection signal is sent to the control system of the sewing machine to improve the safety of the operation.

[0006] A device for detecting knots in the ribs of a self-sealing bag includes:

[0007] First fixed pulley group; the first fixed pulley group is provided with a first fixed pulley;

[0008] The second fixed pulley group; the second fixed pulley group is equipped with a second fixed pulley;

[0009] A lifting wheel assembly located between the first fixed wheel assembly and the second fixed wheel assembly; the lifting wheel assembly includes: a slidably disposed lifting seat and a movable pulley mounted on the lifting seat;

[0010] The lifting guide rod connects to the lifting wheel assembly; the lifting guide rod passes through the lifting base; and

[0011] Position sensor; The position sensor is used to detect whether the lifting seat is at the preset zero position.

[0012] The aforementioned self-sealing bag rib knot detection device, during operation, sequentially passes the material strip through a first fixed pulley, a movable pulley, and a second fixed pulley. If the material strip exits the hopper without knotting, the lifting seat overcomes the tension of the material strip under gravity and remains at a preset zero position. If knotting occurs when the material strip exits the hopper, the first fixed pulley cannot feed the material strip further, while the material strip at the second fixed pulley is still being pulled by the feeding mechanism. Therefore, the movable pulley begins to rise under the combined action of the material strip and the lifting guide rod, thereby causing the lifting seat to leave the preset zero position. The position sensor is triggered and sends a stop detection signal to the sewing machine's control system. Through this design, the fixed and movable pulleys guide the forward trajectory of the material strip, and by detecting the position change of the movable pulley, it determines whether knotting has occurred when the material strip exits the hopper. Before the material strip is torn, a stop detection signal is sent to the sewing machine's control system, improving operational safety.

[0013] In one embodiment, the first fixed wheel assembly is provided with a first limiting frame connecting to the first fixed pulley; the second fixed wheel assembly is provided with a second limiting frame connecting to the second fixed pulley; the lifting wheel assembly further includes a third limiting frame connecting to the movable pulley. The first limiting frame is used to limit the posture of the material belt to prevent the material belt from detaching from the first fixed pulley. The second limiting frame is used to limit the posture of the material belt to prevent the material belt from detaching from the second fixed pulley. The third limiting frame is used to limit the posture of the material belt to prevent the material belt from detaching from the movable pulley, thereby improving the stability of the material belt conveying posture.

[0014] In one embodiment, the first fixed pulley and the second fixed pulley are located at the same height, and the movement trajectory of the movable pulley coincides with the perpendicular bisector of the line connecting the first and second fixed pulleys. The first and second fixed pulleys are arranged symmetrically about the movement trajectory of the movable pulley, which helps to improve the force balance of the lifting wheel assembly, thereby improving the stability of the material belt conveyor and the stability of the lifting wheel assembly's lifting action.

[0015] In one embodiment, the lifting wheel assembly further includes a buffer pad installed at the bottom of the lifting seat. The buffer pad can be used to adjust the zero-position height of the lifting seat and to mitigate the impact force when the lifting seat descends to its lowest point.

[0016] In one embodiment, the lifting wheel assembly further includes a counterweight basket mounted on the lifting base; the counterweight basket is used to hold counterweight blocks. By adjusting the weight and number of counterweight blocks in the counterweight basket, the weight of the lifting wheel assembly can be adjusted, facilitating the control of the belt tension.

[0017] In one embodiment, the position sensor is a photoelectric gate; the lifting platform is equipped with a baffle that extends into the photoelectric gate. The combination of the photoelectric gate and the baffle enables non-contact position detection, avoiding interference with the movement of the lifting wheel assembly.

[0018] In one embodiment, the self-sealing bag's rib knot detection device further includes a guide collar located on the side of the first fixed pulley group away from the second fixed pulley group; the guide collar is used for the feed belt to pass through. The guide collar can restrict the feed belt before it enters the first fixed pulley group, thereby assisting in controlling the feed belt's forward trajectory and improving the fit between the feed belt and the first fixed pulley.

[0019] In one embodiment, the self-sealing bag's rib knot detection device further includes a bracket; a first fixed wheel group, a second fixed wheel group, a lifting guide rod, and a position sensor are all mounted on the bracket. The bracket allows the entire self-sealing bag's rib knot detection device to form an independently movable functional module, reducing the installation and debugging difficulty when installing the device onto a sewing machine. Attached Figure Description

[0020] Figure 1 This is a perspective view of a self-sealing bag rib knot detection device according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A perspective view of the self-sealing bag rib knot detection device from another angle;

[0022] Figure 3 for Figure 1 An exploded view of the device for detecting knotted ribs in a self-sealing bag;

[0023] Figure 4 for Figure 3 A perspective view of the first fixed wheel assembly in the self-sealing bag rib knot detection device shown;

[0024] Figure 5 for Figure 3 A perspective view of the second fixed wheel assembly in the self-sealing bag rib knot detection device shown;

[0025] Figure 6 for Figure 3 A perspective view of the lifting wheel assembly in the self-sealing bag rib knot detection device shown;

[0026] Figure 7 for Figure 6 A three-dimensional view of the lifting wheel assembly from another perspective;

[0027] Figure 8 for Figure 3A perspective view of the guide collar in the self-sealing bag rib knot detection device shown;

[0028] Figure 9 for Figure 1 The diagram shows the usage status of the self-sealing bag's rib knot detection device;

[0029] Figure 10 for Figure 9 The diagram shows the working principle of the self-sealing bag rib knot detection device.

[0030] The meanings of the labels in the attached diagram are as follows:

[0031] 100-Self-sealing bag rib knot detection device;

[0032] 10-First fixed wheel assembly, 11-First fixed pulley, 12-First limiting frame;

[0033] 20 - Second fixed wheel assembly; 21 - Second fixed pulley; 22 - Second limiting frame;

[0034] 30-Lifting wheel assembly, 31-Lifting seat, 311-Baffle plate, 32-Moving pulley, 33-Third limit frame, 34-Buffer pad;

[0035] 40 - Lifting guide rod;

[0036] 50 - Position sensor;

[0037] 60-Guide collar;

[0038] 70-Staff;

[0039] 200-material strip. Detailed Implementation

[0040] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0046] like Figures 1 to 10 As shown, it is a self-sealing bag rib knot detection device 100 according to an embodiment of the present invention.

[0047] like Figures 1 to 3 As shown, the self-sealing bag's rib knot detection device 100 includes: a first fixed wheel group 10, a second fixed wheel group 20, a lifting wheel group 30 located between the first fixed wheel group 10 and the second fixed wheel group 20, a lifting guide rod 40 connected to the lifting wheel group 30, and a position sensor 50. Figure 10 As shown, during operation, the first fixed wheel set 10 and the second fixed wheel set 20 guide the forward direction of the material belt 200, serving a guiding function. The lifting wheel set 30 is a lifting mechanism, and when the material belt 200 output from the hopper becomes knotted, the lifting wheel set 30 is pulled up as the tension of the material belt 200 increases. The lifting guide rod 40 limits the movement trajectory of the lifting wheel set 30, allowing the position sensor 50 to accurately detect whether the lifting wheel set 30 has moved away from the zero position due to being pulled up, thereby detecting whether the material belt 200 has become knotted when output from the hopper.

[0048] The following text, combined with Figures 1 to 10 As shown, the above-mentioned self-sealing bag rib knot detection device 100 will be further explained.

[0049] like Figure 4 As shown, the first fixed pulley group 10 is equipped with a first fixed pulley 11. For example... Figure 9 As shown, during operation, the first fixed pulley 11 is used to guide the material belt 200 input and guide the material belt 200 to the lifting wheel assembly 30.

[0050] like Figure 5 As shown, the second fixed pulley group 20 is equipped with a second fixed pulley 21. For example... Figure 9 As shown, during operation, the second fixed pulley 21 is used to receive the material belt 200 from the lifting pulley group 30 and guide the material belt 200 out.

[0051] like Figure 6 and Figure 7As shown, the lifting wheel assembly 30 includes: a slidably disposed lifting seat 31 and a movable pulley 32 mounted on the lifting seat 31. During operation, the lifting seat 31 serves as a lifting platform for the movable pulley 32 and, together with the movable pulley 32, acts as a counterweight, ensuring that the conveyor belt 200 remains taut during transmission between the first fixed pulley 11, the movable pulley 32, and the second fixed pulley 21.

[0052] Furthermore, to prevent the conveyor belt from derailing during transmission between the first fixed pulley 11, the movable pulley 32, and the second fixed pulley 21, improvements can be made. For example, combining... Figures 4 to 6 As shown, in this embodiment, the first fixed wheel assembly 10 is provided with a first limiting frame 12 connecting the first fixed pulley 11. The second fixed wheel assembly 20 is provided with a second limiting frame 22 connecting the second fixed pulley 21. The lifting wheel assembly 30 further includes a third limiting frame 33 connecting the movable pulley 32. The first limiting frame 12 is used to restrict the posture of the material belt 200 to prevent the material belt 200 from detaching from the first fixed pulley 11. The second limiting frame 22 is used to restrict the posture of the material belt 200 to prevent the material belt 200 from detaching from the second fixed pulley 21. The third limiting frame 33 is used to restrict the posture of the material belt 200 to prevent the material belt 200 from detaching from the movable pulley 32, thereby improving the stability of the conveying posture of the material belt 200.

[0053] In addition, improvements can be made to enhance the stability of the lifting wheel assembly 30 during the lifting process.

[0054] For example, such as Figure 10 As shown, in this embodiment, the first fixed pulley 11 and the second fixed pulley 21 are located at the same height, and the movement trajectory of the movable pulley 32 coincides with the perpendicular bisector of the line connecting the first fixed pulley 11 and the second fixed pulley 21. The first fixed pulley 11 and the second fixed pulley 21 are arranged symmetrically about the movement trajectory of the movable pulley 32, which helps to improve the force balance of the lifting wheel assembly 30, thereby improving the stability of the conveying of the material belt 200 and the stability of the lifting action of the lifting wheel assembly 30.

[0055] For example, the self-sealing bag's rib knot detection device 100 also includes a guide collar 60 located on the side of the first fixed pulley group 10 away from the second fixed pulley group 20. The guide collar 60 is used for the feed belt 200 to pass through. The guide collar 60 can restrict the feed belt before it enters the first fixed pulley group 10, thereby assisting in controlling the forward trajectory of the feed belt 200 and improving the fit between the feed belt 200 and the first fixed pulley 11.

[0056] like Figure 1 As shown, the lifting guide rod 40 passes through the lifting seat 31. The lifting guide rod 40 is used to limit the movement trajectory of the lifting seat 31, so that when the movable pulley 32 is pulled, the lifting seat 31 that moves with it can move according to the preset trajectory.

[0057] In this embodiment, the position sensor 50 is used to detect whether the lifting seat 31 is located at a preset zero position. Furthermore, in this solution, the position sensor 50 can be a contact sensor or a non-contact sensor.

[0058] Taking non-contact sensors as an example, combined with Figure 2 , Figure 3 ,as well as Figure 7 As shown, in this embodiment, the position sensor 50 is a photoelectric gate. The lifting base 31 is provided with a baffle 311 that extends into the photoelectric gate. By using the combination of the photoelectric gate and the baffle 311, non-contact position detection can be achieved, avoiding interference with the movement of the lifting wheel assembly 30.

[0059] Brief description of working principle:

[0060] like Figure 8 As shown, during operation, the material belt 200 is passed sequentially through the first fixed pulley 11, the movable pulley 32, and the second fixed pulley 21. If the material belt 200 is not knotted when it is output from the material box, the lifting seat 31 overcomes the tension of the material belt 200 under the action of gravity and stops at the preset zero position.

[0061] Because the tension of the conveyor belt 200 between the first fixed pulley 11, the movable pulley 32, and the second fixed pulley 21 is related to the weight of the lifting wheel assembly 30, in some embodiments, to reduce the difficulty of equipment debugging, the lifting wheel assembly 30 may further include a counterweight basket mounted on the lifting seat 31. The counterweight basket is used to hold counterweights. By adjusting the weight and number of counterweights in the counterweight basket, the weight of the lifting wheel assembly 30 can be adjusted, facilitating the control of the tension of the conveyor belt 200.

[0062] like Figure 10 As shown, if the material belt 200 gets knotted when it is output from the hopper, it will be because the first fixed pulley 11 can no longer feed the material belt 200 forward (for example). Figure 10 (The material strip 200 at point A is in a locked state), while the material strip 200 at the second fixed pulley 21 is continued to be pulled by the feeding mechanism (see [reference]). Figure 10 The arrow points to the material belt 200 between the moving pulley 32 and the second fixed pulley 21. Therefore, the moving pulley 32 begins to rise under the combined action of the material belt 200 and the lifting guide rod 40 (see [reference]). Figure 10 (The arrow in the movable pulley 32 points to) and thus drives the lifting seat 31 away from the preset zero position. The position sensor 50 is triggered and sends a stop detection signal to the control system of the sewing machine. When the control system of the sewing machine receives the stop detection signal, it can control the material conveying mechanism to stop and issue an alarm signal to prompt the operator to deal with the knot in the material belt 200 in the material box.

[0063] Furthermore, in this design, the preset zero position of the lifting seat 31 corresponds to the lowest point of the lifting stroke of the lifting seat 31. To protect the lifting seat 31 and prevent a rigid collision when it descends to the zero point, such as... Figure 7 As shown, in this embodiment, the lifting wheel assembly 30 may further include a buffer pad 34 installed at the bottom of the lifting seat 31. The buffer pad 34 can be used to adjust the zero height of the lifting seat 31, and plays a role in reducing the impact force when the lifting seat 31 descends to the lowest point.

[0064] In addition, to facilitate the installation and commissioning of the equipment, such as Figures 1 to 3 As shown, in this embodiment, the self-sealing bag's rib knot detection device 100 further includes a bracket 70. The first fixed wheel set 10, the second fixed wheel set 20, the lifting guide rod 40, and the position sensor 50 are all mounted on the bracket 70. The bracket 70 allows the entire self-sealing bag's rib knot detection device 100 to form an independently movable functional module, reducing the installation and debugging difficulty when installing the device onto a sewing machine.

[0065] It should be noted that in other embodiments, the bracket 70 can be omitted, and the first fixed wheel group 10, the second fixed wheel group 20, the lifting guide rod 40, and the position sensor 50 can be directly installed on the frame of the sewing machine (e.g., on one side of the frame of the sewing machine).

[0066] The self-sealing bag rib knot detection device 100 uses fixed pulleys and movable pulleys 32 to guide the forward trajectory of the material belt 200, and determines whether the material belt 200 is knotted when it is output from the material box by detecting the position change of the movable pulley 32. Before the material belt 200 is torn, a stop detection signal is sent to the control system of the sewing machine to improve the safety of the operation.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A device for detecting knots in the ribs of a self-sealing bag, characterized in that, include: First fixed wheelset; The first fixed wheel assembly is equipped with a first fixed pulley; Second fixed wheelset; The second fixed pulley group is equipped with a second fixed pulley; A lifting wheel assembly located between the first fixed wheel assembly and the second fixed wheel assembly; The lifting wheel assembly includes: a slidably disposed lifting seat and a movable pulley mounted on the lifting seat; The lifting guide rod connects to the lifting wheel assembly; the lifting guide rod passes through the lifting base; and Position sensor; the position sensor is used to detect whether the lifting seat is located at a preset zero position.

2. The self-sealing bag rib knot detection device according to claim 1, characterized in that, The first fixed wheel assembly is provided with a first limiting frame that connects to the first fixed pulley; The second fixed wheel assembly is provided with a second limiting frame connecting the second fixed pulley; the lifting wheel assembly further includes a third limiting frame connecting the movable pulley.

3. The self-sealing bag rib knot detection device according to claim 1, characterized in that, The first fixed pulley and the second fixed pulley are located at the same height, and the movement trajectory of the movable pulley coincides with the perpendicular bisector of the line connecting the first fixed pulley and the second fixed pulley.

4. The self-sealing bag rib knot detection device according to claim 1, characterized in that, The lifting wheel assembly also includes a buffer pad installed at the bottom of the lifting seat.

5. The self-sealing bag rib knot detection device according to claim 1, characterized in that, The lifting wheel assembly also includes a counterweight basket installed on the lifting base; the counterweight basket is used to place counterweight blocks.

6. The self-sealing bag rib knot detection device according to claim 1, characterized in that, The position sensor is a photoelectric gate; the lifting seat is equipped with a baffle that extends into the photoelectric gate.

7. The self-sealing bag rib knot detection device according to claim 1, characterized in that, Also includes: A guide collar is located on the side of the first fixed wheel assembly away from the second fixed wheel assembly; the guide collar is used for the feed belt to pass through.

8. The device for detecting knotted ribs in a self-sealing bag according to claim 1, characterized in that, Also includes: The bracket; the first fixed wheel set, the second fixed wheel set, the lifting guide rod, and the position sensor are all mounted on the bracket.

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