Detection structure for deviation rectification of film running of air cushion machine

Abstract

The utility model discloses a detection structure for deviation rectification of film running of an air cushion machine, and the detection structure for deviation rectification of film running of the air cushion machine comprises a motion module which is arranged in a way that when an air cushion film of the air cushion machine moves along a film running path, the motion module can move under the condition that the motion module is subjected to a sealing line acting force of the air cushion film; the motion module is further arranged to be capable of recovering to the original position after the acting force of the sealing line of the air cushion film is removed; and the movement module and the detection module are arranged in a manner that the detection module is configured to be capable of determining the position of the air cushion film according to the detected position of the movement module. Therefore, the detection module can detect whether the movement module is driven by the sealing line of the air cushion film or not and detect the movement position of the movement module driven by the sealing line of the air cushion film so as to determine whether the air cushion film deviates or not.

Description

Technical Field

[0001] This utility model relates to the field of packaging technology, specifically to a detection structure for correcting the film movement of an air cushion machine. Background Technology

[0002] An air cushion machine (also known as a bubble wrap machine or air cushion packaging machine) is a device used to produce cushioning packaging materials (such as bubble wrap, air cushion bags, etc.), mainly used to protect fragile, delicate or high-value goods during transportation.

[0003] Air cushion machines work by heat-sealing and inflating two layers of plastic film (usually polyethylene PE) to form a sealed bubble structure. The specific process includes: film unwinding, heating and shaping, inflation, cooling and setting, and rewinding or slitting. Unwinding involves unfolding the two layers of plastic film from the roll; heating and shaping uses heated rollers or molds to press bubble grooves into the bottom film; inflation involves injecting air into the grooves before heat-sealing the two layers to form independent bubble units; cooling and setting uses cooling rollers to rapidly cool and fix the bubble shape; and rewinding or slitting involves either rewinding the finished product into a bubble wrap roll or directly slitting it into air cushion bags.

[0004] However, current air cushion machines cannot guarantee that the cross-section is 100% flat when winding the film. This will cause the film to shift left and right along the film path, affecting the heating and shaping, and cooling shaping quality (heat sealing quality). In severe cases, it may even lead to the inability to completely seal the air chamber, resulting in a poorer cushioning effect of the prepared bubble film and air cushion bag. Utility Model Content

[0005] To address at least one of the aforementioned problems, according to one aspect of the present invention, a detection structure for correcting the deviation of film on an air cushion machine is provided.

[0006] The detection structure for correcting the film movement of an air cushion machine includes a motion module, which includes a first reset unit and a swinging or moving component; and a detection module, which is configured to determine the position of the air cushion film based on the detected position of the swinging or moving component (at least one of before, during, and after being subjected to the sealing force of the air cushion film). The swinging and moving components are configured such that, when the air cushion film of the air cushion machine moves along the film movement path, the swinging component can swing relative to the air cushion film about its axis of rotation under the sealing force of the air cushion film, and the moving component can move relative to the air cushion film under the sealing force of the air cushion film. The first reset unit, the swinging component, and the moving component are further configured such that, after the force exerted by the sealing force of the air cushion film on the swinging and moving components is removed, the first reset unit can drive the swinging and moving components to return to their original positions.

[0007] Therefore, the detection module can detect whether the oscillating or moving component is driven by the sealing line of the air cushion film, and the position of the oscillating or moving component driven by the sealing line, thus determining the actual film-moving position of the air cushion film. This allows the operator to determine whether the air cushion film has deviated based on its actual position and adjust it to the ideal film-moving path. Furthermore, because the sealing lines of the air cushion film are spaced along the film-moving path, the oscillating or moving component returns to its original position after the force exerted by the sealing line is removed, so that it can oscillate again when subjected to the sealing force of the air cushion film the next time.

[0008] In some embodiments, the first free end of the swing member is configured to swing relative to the air cushion film under the force of the sealing line of the air cushion film. This allows the swing member to swing relative to the air cushion film under the force of the sealing line, changing its motion state so that the movement position of the air cushion film can be determined by detecting the swing member in different states using a detection module. Furthermore, since the swing member can swing relative to the air cushion film, it avoids obstructing the movement of the air cushion film.

[0009] In some implementations, the detection module is configured to determine the position of the air cushion film based on the detected position of the oscillating or moving component. This is achieved by the detection module determining the position of the air cushion film based on the detected position of the oscillating or moving component at at least one of the following: before, during, and after the sealing force of the air cushion film. Thus, by determining the position of the oscillating or moving component, the detection module can determine the actual film-moving position of the air cushion film: for example, when the oscillating or moving component is not subjected to the sealing force of the air cushion film, the air cushion film is located outside the ideal film-moving path; when the oscillating or moving component is momentarily subjected to the sealing force of the air cushion film, the air cushion film is located on the ideal film-moving path; when the oscillating or moving component is subjected to the sealing force of the air cushion film for a prolonged period, the air cushion film is located inside the ideal film-moving path.

[0010] In some embodiments, the detection module includes at least one of a first detection unit and a second detection unit; the first detection unit is used to detect the position of at least one of the first free end and the second free end of the swinging member; the second detection unit is used to detect the angle of swing of the first free end of the swinging member relative to the air cushion film. Thus, the position of the swinging member can be determined by detecting the swinging position of the swinging member by the first detection unit or by detecting the swinging angle of the swinging member by the second detection unit.

[0011] In some embodiments, the first detection unit includes at least one of a first sensor and a second sensor. The first sensor is configured to detect a first free end or a second free end of the swinging member located in its original position, and the second sensor is configured to detect the first free end or the second free end of the swinging member just subjected to the sealing force of the air cushion film. Thus, the first sensor can detect whether the swinging member has returned to its original position, and the second sensor can detect whether the swinging member is swinging due to the sealing force of the air cushion film.

[0012] In some embodiments, the first reset unit is an elastic element capable of restoring the swinging element to its original position. Thus, the elastic element allows the swinging element to automatically return to its original position without being subjected to the sealing force of the air cushion film.

[0013] In some embodiments, the detection structure for correcting the film movement of the air cushion machine further includes a control module. The control module is configured to output the sway state of the air cushion film based on a comparison of the number of times at least one of the first and second sensors detects the first or second free end of the oscillating member with a set value. Thus, the control module can determine the sway state of the air cushion film; it can also control the drive module to drive the air cushion film to generate corresponding movement based on the sway state, so that the air cushion film can be kept on the ideal film movement path.

[0014] In some embodiments, the detection structure for correcting the film movement of the air cushion machine further includes a control module; the control module is configured to output the sway state of the air cushion film by comparing the angle of sway of the first free end of the oscillating member relative to the air cushion film detected by the second detection unit with a set angle. This simplifies the detection method for the oscillating member.

[0015] In some embodiments, the detection structure for correcting the film movement of the air cushion machine further includes a control module; the measured time interval Td between the first sensor detecting that the second free end of the oscillating component leaves its original position and detecting that the second free end of the oscillating component returns to its original position is defined as the measured time interval Td. The control module is configured to compare the measured time interval Td with a preset theoretical time range. Thus, it is possible to determine whether the air cushion film falls on the ideal film movement path when moving along the film movement path based on the measured time interval Td.

[0016] In some implementations, the elastic element is a torsion spring. This ensures a simple and compact structure for the detection structure used in air cushion machine film alignment correction, guaranteeing miniaturization and simplifying maintenance.

[0017] In some implementations, the second detection unit is an encoder. This ensures a simple and compact structure for the detection structure used to correct the film movement of the air cushion machine, guaranteeing its miniaturization and simplifying maintenance.

[0018] In some embodiments, the axis of rotation of the oscillating member relative to the air cushion film is perpendicular to at least one of the sealing line and the film travel path of the air cushion film. This ensures smooth oscillation of the oscillating member.

[0019] In some embodiments, at least one of the first sensor and the second sensor is positioned corresponding to one of the first and second free ends of the oscillating member when the air cushion film is on the ideal film-moving path. Thus, it can be determined whether the air cushion film has traversed the ideal film-moving path using either the first or second sensor. Preferably, at least one of the first and second sensors is a photoelectric sensor or a proximity switch. This avoids the problems of large size and high cost associated with using ultrasonic sensors, achieving a small size, low cost, and reliable function. Especially when the first detection unit includes at least one of the first and second sensors, and the first and / or second sensor is configured to detect the second free end of the oscillating member, since the first and / or second sensors are not located at the first free end of the oscillating member and are positioned away from the film, impurities generated during film movement have less impact on the first and second sensors. Therefore, even if the first and second sensors are photoelectric sensors, there will be no problem of impurity accumulation obstructing them. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the detection structure for correcting the film deviation of an air cushion machine according to the first embodiment of the present invention, showing the air cushion film in the first sway position.

[0021] Figure 2 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the first embodiment of the present invention, showing the air cushion film in the second sway position and the motion module in the first position.

[0022] Figure 3 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the first embodiment of the present invention, showing the air cushion film in the second sway position and the motion module in the second position.

[0023] Figure 4 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the first embodiment of the present invention, showing that the air cushion film is on an ideal film movement path and the motion module is in the first position.

[0024] Figure 5 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the first embodiment of the present invention, showing that the air cushion film is on an ideal film movement path and the motion module is in the second position.

[0025] Figure 6 for Figure 4The diagram shows a cross-sectional view of the detection structure used for correcting the film movement of an air cushion machine.

[0026] Figure 7 for Figure 5 The diagram shows a cross-sectional view of the detection structure used for correcting the film movement of an air cushion machine.

[0027] Figure 8 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the first embodiment of the present invention, showing the air cushion film in the third sway position and the motion module in the first position.

[0028] Figure 9 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the first embodiment of the present invention. The air cushion film is in the third sway position and the motion module is in the position between the first position and the second position.

[0029] Figure 10 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the first embodiment of the present invention, showing the air cushion film in the third sway position and the motion module in the second position.

[0030] Figure 11 This is a schematic diagram of the module structure of the detection structure for correcting the film movement of an air cushion machine according to the first embodiment of this utility model.

[0031] Figure 12 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the second embodiment of the present invention, showing the air cushion film in the first sway position.

[0032] Figure 13 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the second embodiment of the present invention, showing the air cushion film in the second sway position and the motion module in the first position.

[0033] Figure 14 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the second embodiment of the present invention, showing the air cushion film in the second sway position and the motion module in the second position.

[0034] Figure 15 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the second embodiment of the present invention, showing that the air cushion film is on an ideal film movement path and the motion module is in the first position.

[0035] Figure 16 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the second embodiment of the present invention, showing that the air cushion film is on an ideal film movement path and the motion module is in the second position.

[0036] Figure 17This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the second embodiment of the present invention, showing the air cushion film in the third sway position and the motion module in the first position.

[0037] Figure 18 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the second embodiment of the present invention, showing the air cushion film in the third sway position and the motion module in the second position.

[0038] Figure 19 This is a schematic diagram of the detection structure for correcting the film deviation of an air cushion machine according to the third embodiment of the present invention, showing the air cushion film in the first sway position.

[0039] Figure 20 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the third embodiment of the present invention, showing the air cushion film in an ideal film movement path.

[0040] Figure 21 This is a schematic diagram of the detection structure for correcting the film deviation of an air cushion machine according to the third embodiment of the present invention, showing the air cushion film in the third sway position.

[0041] Figure 22 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the fourth embodiment of the present invention, showing the air cushion film in the ideal film movement position.

[0042] Figure 23 This is a schematic diagram of the detection structure for correcting the film movement of an air cushion machine according to the fourth embodiment of the present invention, showing the air cushion film in the ideal film movement position.

[0043] Reference numerals: 100, base; 20, motion module; 21, swinging component; 211, first free end; 212, second free end; 213, rotating shaft; 22, first reset unit; 23, moving component; 231, third free end; 232, fourth free end; 24, guide rail; 25, second reset unit; 30, detection module; 31, first detection unit; 311, first sensor; 312, second sensor; 32, second detection unit; 40, air cushion membrane; 41, sealing line; 50, control module. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0045] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising" or "including" include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The terminology used herein is generally that commonly used by those skilled in the art; in case of any discrepancy with commonly used terminology, the terminology used herein shall prevail.

[0046] Furthermore, for ease of description, spatial relative terms such as “below,” “under,” “lower,” “above,” and “upper” may be used herein to describe the relationship between one element or component and another (or other) element or component as shown in the figure. In addition to the orientation shown in the figure, spatial relative terms are intended to include different orientations of the device during use or operation. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein can be interpreted accordingly.

[0047] In this article, the term "film path" refers to the actual direction of movement of the film in the air cushion machine under the driving action of the drive equipment, such as... Figures 1 to 10 , Figures 12 to 23 As shown, along the X direction.

[0048] In this paper, the term "membrane sealing line" refers to the sealing line on the membrane that divides the membrane into several air cushion units. Inflating the space between adjacent sealing lines forms an air cushion unit, and several air cushion units are arranged sequentially along the membrane travel path. The membrane sealing lines can be positioned nearly perpendicular to the membrane travel path, i.e., the sealing lines have a straight structure (e.g., ...). Figures 1 to 10 (As shown); it can also include a first sealing segment that is nearly perpendicular to the film-moving path and a second sealing segment that is nearly parallel to the film-moving path, with the second sealing segment connected to one end of the first sealing segment near the swinging part, i.e., the sealing line has an "L" shaped structure (as shown). Figures 12 to 18 (As shown). Two sealing lines can be installed between adjacent air cushion units (such as...). Figures 1 to 10 (as shown); or only one sealing line can be set (such as...). Figures 19 to 21 (As shown).

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0050] Figures 1 to 11 The diagram schematically illustrates a detection structure for correcting the film movement of an air cushion machine according to a first embodiment of the present invention.

[0051] like Figures 6 to 7 As shown, the detection structure for correcting the film movement of an air cushion machine includes a swing element 21, a torsion spring, a first sensor 311, and a second sensor 312. Figures 1 to 5 , Figures 8 to 10 As shown, the swing member 21 is swingably disposed relative to the base 100 of the air cushion machine, so that the swing member 21 is swingably disposed relative to the air cushion film 40 (hereinafter referred to as the film); the first free end 211 of the swing member 21 is configured to swing relative to the film about the rotation axis 213 of the swing member 21 under the force of the sealing line 41 of the film. Figures 4 to 7 As shown, a torsion spring is sleeved on the outer ring of the pivot shaft 213 of the oscillating member 21. One arm of the torsion spring is fixed relative to the base 100, and the other arm is fixed relative to the oscillating member 21. The torsion spring is configured such that when the sealing line 41 of the removed film applies a force to the oscillating member 21, it can drive the oscillating member 21 to return to its original position. Figure 1 , Figure 2 , Figure 4 and Figure 8 As shown, the first sensor 311 is configured to detect the second free end 212 of the swing member 21 located in its original position. Figure 5 and Figure 9 As shown, the second sensor 312 is configured to detect the second free end 212 of the swing member 21 that has just been subjected to the force of the sealing line 41 of the membrane, that is, the second sensor 312 can detect whether the swing member 21 is swinging due to the force of the sealing line 41 of the membrane.

[0052] Therefore, by setting the positions of the swing member 21, the first sensor 311, and the second sensor 312, the first sensor 311 and the second sensor 312 can determine the actual film-moving position of the membrane by detecting the position of the swing member 21 (the actual film-moving position of the air cushion membrane 40 is the line connecting the ends of all the sealing lines 41 of the membrane closest to the first sensor 311, such as...). Figures 1 to 10 As shown): For example, such as Figure 1As shown, when the oscillating member 21 is not affected by the sealing line 41 of the membrane, the oscillating member 21 is in the first position (that is, the original position of the oscillating member 21). At this time, the first sensor 311 can always detect the second free end 212 of the oscillating member 21, which indicates that the membrane is in a position relatively outside the ideal membrane path (this position is defined as the first sway position of the membrane). When it is necessary to make the membrane, which is relatively outside the ideal membrane path, approach the ideal membrane path, this can be achieved by moving the entire membrane toward the ideal membrane path, that is, moving the entire membrane toward the side where the oscillating member 21 is located. For example, Figure 2 As shown, when the oscillating member 21 is not yet acted upon by the sealing line 41 of the membrane, the oscillating member 21 is in the first position; as Figure 3 As shown, when the oscillating member 21 swings to its maximum angle under the action of the membrane sealing line 41 (the oscillating member 21 is in the second position), the second free end 212 of the oscillating member 21 is located between the first sensor 311 and the second sensor 312. That is, the second sensor 312 never detects the second free end 212 of the oscillating member 21. This indicates that the membrane is still in a position slightly outside the ideal membrane path (this position is defined as the second deflection position of the membrane). For example, Figure 4 As shown, when the oscillating member 21 is not yet acted upon by the sealing line 41 of the membrane, the oscillating member 21 is in the first position; as Figure 5 As shown, when the oscillating member 21 swings to its maximum angle under the action of the membrane sealing line 41 (the oscillating member 21 is in the second position), the second free end 212 of the oscillating member 21 is detected by the second sensor 312. This indicates that the membrane is exactly on the ideal membrane path. That is, when the oscillating member 21 is instantaneously acted upon by the membrane sealing line 41, the membrane is on the ideal membrane path. In other words, the second sensor 312 is positioned at a position corresponding to either the first free end 211 or the second free end 212 of the motion module 20 when the membrane is on the ideal membrane path. Since the membrane sealing lines 41 are spaced apart along the membrane path, after the force exerted by the membrane sealing lines 41 on the membrane is removed, the oscillating member 21 will return to its original position under the action of the torsion spring, so that it can swing again when acted upon by the membrane sealing line 41 again. For example, Figure 8 As shown, when the oscillating member 21 is not yet acted upon by the sealing line 41 of the membrane, the oscillating member 21 is in the first position; as Figure 9 As shown, after the oscillating member 21 oscillates to the position detected by the second sensor 312 under the force of the sealing line 41 of the membrane, it continues to oscillate away from the end where the first sensor 311 is located (e.g., Figure 10As shown), when the oscillating member 21 swings to its maximum angle under the action of the sealing line 41 of the membrane (the oscillating member 21 is in the second position), the second free end 212 of the oscillating member 21 is located on the side of the second sensor 312 away from the first sensor 311. That is, between the two times the first sensor 311 detects the second free end 212 of the oscillating member 21, the second sensor 312 detects the second free end 212 of the oscillating member 21 twice. This indicates that the membrane is still in a position relatively inward of the ideal membrane path (this position is defined as the third sway position of the membrane). That is, when the motion module 20 is subjected to the action of the sealing line 41 of the membrane for a long time, the membrane is in a position relatively inward of the ideal membrane path. When it is necessary to make the membrane approach the ideal membrane path, it can be achieved by moving the entire membrane toward the ideal membrane path, that is, moving the entire membrane toward the side away from the oscillating member 21.

[0053] When the detection structure for air cushion machine film deviation correction is used to detect film deviation, the oscillating member 21 can oscillate relative to the film under the force of the film sealing line 41, so that the motion state of the oscillating member 21 can be changed. This allows the detection module 30 to detect the oscillating member 21 in different states (at least one of before, during, and after being subjected to the force of the film sealing line 41) and the motion position of the oscillating member 21 to determine the motion position of the film. This allows the operator to determine whether the film has deviated based on its actual position and adjust the film to the ideal path. Furthermore, since the oscillating member 21 can oscillate relative to the film, it can avoid obstructing the movement of the film. Also, since the oscillating member 21 is reset by a torsion spring, the detection structure for air cushion machine film deviation correction can be kept simple and compact, while also ensuring its miniaturization and simplifying the maintenance process.

[0054] In some embodiments, a torsion spring constitutes the first reset unit 22 of one embodiment of this application. The first reset unit 22 can also be implemented in other ways, as long as it enables the swing member 21 to return to its original position without being subjected to the force of the membrane sealing line 41. For example, other elastic members such as compression springs can be used, as well as driving devices or transmission mechanisms.

[0055] In some embodiments, the swing member 21 and the first reset unit 22 constitute a motion module 20 according to an embodiment of this application. The motion module 20 can also be implemented in other ways, as long as it can move under the force of the sealing line 41 of the film when the film of the air cushion machine moves along the film-walking path, and can return to its original position after the force of the sealing line 41 is removed. For example, a moving mechanism, a transmission mechanism, or a driving device can be used.

[0056] In some embodiments, the first sensor 311 and the second sensor 312 constitute the first detection unit 31 of an embodiment of this application.

[0057] In some embodiments, the first detection unit 31 constitutes the detection module 30 of one embodiment of this application. The detection module 30 can also be implemented in other ways, as long as the detection module 30 can determine the position of the membrane based on the position of the oscillating block.

[0058] In some preferred embodiments, in order to ensure the smooth swing of the swing member 21, the pivot axis 213 of the swing member 21 relative to the membrane is perpendicular to the sealing line 41 of the membrane.

[0059] In some preferred embodiments, in order to ensure the smooth swing of the swing member 21, the pivot axis 213 of the swing member 21 relative to the membrane swing is perpendicular to the membrane path.

[0060] In some implementations, such as Figure 11As shown, the detection structure for correcting the film movement of the air cushion machine also includes a control module 50. The control module 50 is configured to output the film's sway state based on a comparison of the number of times that at least one of the first sensor 311 or the second sensor 312 detects the first free end 211 or the second free end 212 of the oscillating member 21 with a set value, so that the control module 50 can determine the film's sway state. The control module 50 can also control the drive module to drive the film to generate corresponding movements according to the film's sway state, so that the film can be kept on the ideal film movement path. Preferably, the detection structure for correcting the film movement of the air cushion machine further includes a counter. Since the first sensor 311 is configured to detect the second free end 212 of the swing member 21 located in its original position (i.e., the first sensor 311 is configured such that the second free end 212 corresponds to the position when the swing member 21 is in its original position); the second sensor 312 is configured such that the position of one of the first free end 211 and the second free end 212 of the motion module 20 corresponds to the position when the air cushion film 40 is located on the ideal film movement path. The control module 50 detects the second free end 212 of the swing member 21 through the first sensor 311 and the second sensor 312, and infers the actual film movement position by combining the detection results of the first sensor 311 and the second sensor 312. For example, if the first sensor 311 detects the second free end 212 of the swing member 21 twice consecutively, but the second sensor 312 does not detect the second free end 212 of the swing member 21, then it can be determined that the membrane is located slightly outside the ideal membrane path. Similarly, if the second sensor 312 detects the free end of the swing member 21 once within the time period when the first sensor 311 detects the second free end 212 twice consecutively, then the membrane is on the ideal membrane path. Furthermore, if the second sensor 312 detects the free end of the swing member 21 twice within the time period when the first sensor 311 detects the second free end 212 twice consecutively, then the membrane is located inside the ideal membrane path.

[0061] In one specific embodiment of the first sensor 311 and the second sensor 312, at least one of the first sensor 311 and the second sensor 312 is a photoelectric sensor or a proximity switch. This avoids the problem of reduced detection accuracy due to accumulated impurities when using a photoelectric sensor; it also avoids the problems of large size and high cost associated with using an ultrasonic sensor.

[0062] In some embodiments, the first sensor 311 is configured to detect the second free end 212 of the swing member 21 located in its original position, and the second sensor 312 is configured to detect the first free end 211 of the swing member 21 just subjected to the force of the sealing line 41 of the membrane. In still other embodiments, the first sensor 311 is configured to detect the first free end 211 of the swing member 21 located in its original position, and the second sensor 312 is configured to detect the second free end 212 of the swing member 21 just subjected to the force of the sealing line 41 of the membrane. In yet another embodiment, the first sensor 311 is configured to detect the first free end 211 of the swing member 21 located in its original position, and the second sensor 312 is configured to detect the first free end 211 of the swing member 21 just subjected to the force of the sealing line 41 of the membrane.

[0063] Figures 12 to 18 The diagram schematically illustrates a detection structure for correcting the film deviation of an air cushion machine according to a second embodiment of the present invention.

[0064] like Figures 12 to 18 As shown, the main difference between this embodiment and the first embodiment is that the swing member 21 and torsion spring are not provided; instead, a guide rail 24, a moving member 23, and a compression spring are provided. The guide rail 24 is fixedly disposed relative to the base 100 and is used to limit the movement direction of the moving member 23; the third free end 231 of the moving member 23 is configured to move along the extension direction of the guide rail 24 under the force of the sealing line 41 of the air cushion film 40 (hereinafter referred to as the film). Figures 12 to 18 As shown, a compression spring is sleeved on the outer ring of the guide rail 24 or the moving part 23. One end of the compression spring is fixed relative to the base 100, and the other end is fixed relative to the moving part 23. The compression spring is configured such that after the sealing line 41 of the removed film applies a force to the moving part 23, it can drive the moving part 23 to return to its original position. Figure 12 , Figure 13 , Figure 15 and Figure 17 As shown, the first sensor 311 is configured to detect the fourth free end 232 of the moving member 23 located in its original position. Figure 16 and Figure 18 As shown, the second sensor 312 is configured to detect the fourth free end 232 of the moving member 23 subjected to the force of the sealing line 41 of the membrane, that is, the second sensor 312 can detect whether the moving member 23 is moved by the force of the sealing line 41 of the membrane.

[0065] Therefore, by setting the positions of the moving part 23, the first sensor 311, and the second sensor 312, the first sensor 311 and the second sensor 312 can determine the actual film-moving position of the membrane by detecting the position of the moving part 23 (the actual film-moving position of the air cushion film 40 is the line connecting the ends of all the sealing lines 41 of the membrane closest to the first sensor 311, such as...). Figures 12 to 18 As shown): For example, such as Figure 12 As shown, when the moving part 23 is not affected by the sealing line 41 of the membrane, the moving part 23 is in the first position (that is, the original position of the moving part 23). At this time, the first sensor 311 can always detect the fourth free end 232 of the moving part 23, which indicates that the membrane is in the first sway position. For example, Figure 13 As shown, when the moving member 23 is not yet acted upon by the sealing line 41 of the membrane, the moving member 23 is in the first position; as Figure 14 As shown, when the moving member 23 moves the maximum distance under the action of the membrane sealing line 41 (the moving member 23 is in the second position), the fourth free end 232 of the moving member 23 is located between the first sensor 311 and the second sensor 312. That is, the second sensor 312 never detects the fourth free end 232 of the moving member 23. This indicates that the membrane is still in a position slightly outside the ideal path of the membrane (this position is defined as the second sway position of the membrane). For example, Figure 15 As shown, when the moving member 23 is not yet acted upon by the sealing line 41 of the membrane, the moving member 23 is in the first position; as Figure 16 As shown, when the moving part 23 moves its maximum distance under the action of the membrane sealing line 41, the fourth free end 232 of the moving part 23 is detected by the second sensor 312. This indicates that the membrane is exactly on the ideal membrane path, that is, the second sensor 312 is set at the position corresponding to the membrane being on the ideal membrane path. Since the membrane sealing lines 41 are spaced along the membrane path, after the force exerted by the membrane sealing lines 41 on the membrane is removed, the moving part 23 will return to its original position under the action of the compression spring, so that it can move again when subjected to the force of the membrane sealing lines 41 next time. For example, Figure 17 As shown, when the moving member 23 is not yet acted upon by the sealing line 41 of the membrane, the moving member 23 is in the first position; as Figure 18 As shown, after the moving part 23 moves to the position detected by the second sensor 312 under the force of the sealing line 41 of the membrane, it continues to move away from the end where the first sensor 311 is located (e.g., Figure 18As shown), when the moving part moves the maximum distance under the action of the membrane sealing line 41 (the moving part 23 is in the second position), the fourth free end 232 of the moving part 23 is located on the side of the second sensor 312 away from the first sensor 311. That is, between the two times the first sensor 311 detects the fourth free end 232 of the moving part 23, the second sensor 312 detects the fourth free end 232 of the moving part 23 twice. This indicates that the membrane is still in a position relatively inside the ideal path of the membrane (this position is defined as the third sway position of the membrane). That is, when the moving module 20 is subjected to the action of the membrane sealing line 41 for a long time, the membrane is in a position relatively inside the ideal path of the membrane.

[0066] In some embodiments, a compression spring constitutes a first reset unit 22 in one embodiment of this application.

[0067] In some embodiments, the moving part 23, the guide rail 24, and the compression spring constitute a motion module 20 according to an embodiment of this application.

[0068] In some embodiments, the guide rail 24 is perpendicular to the X direction.

[0069] In some embodiments, a guide structure is provided on the upstream side of the movable member 23 facing the membrane, the guide structure being, for example, an inclined surface.

[0070] In some embodiments, when the detection structure for correcting the film movement of the air cushion machine further includes a control module 50, a timer, and a counter, its setup and working principle are similar to those of the detection structure for correcting the film movement of the air cushion machine in the first embodiment, and will not be described again.

[0071] Figures 19 to 21 The diagram schematically illustrates a detection structure for correcting the film deviation of an air cushion machine according to a third embodiment of the present invention.

[0072] like Figures 19 to 21 As shown, the main difference between this embodiment and the first embodiment is that the second sensor 312 is not provided. The first sensor 311 and the swing member 21 are configured such that the first sensor 311 is capable of detecting the second free end 212 of the swing member 21 located in its original position. Furthermore, the first sensor 311 and the swing member 21 are configured as follows: Figure 19As shown, when the swing member 21 is not subjected to the sealing force 41 of the air cushion film 40 (hereinafter referred to as the film), the swing member 21 remains in the first position (that is, the original position of the swing member 21). When the swing member 21 is subjected to the sealing force 41 of the air cushion film 40, the second free end 212 of the swing member 21 will leave the first sensor 311. Since in this embodiment, it is impossible to determine whether the swing member 21 is on the ideal film-moving path by detecting the swing position of the swing member 21, the ideal film-moving path can be set at a position Di away from the first free end 211 of the swing member 21 (e.g., ...). Figure 20 As shown), the value of Di can range from 0 to 2 mm. Additionally, assuming the distance between two adjacent sealing lines 41 of the air cushion film 40 is L, the film travel speed is S, and the time to pass through one air chamber is Δt, then Δt = L / S. The detection time interval T = (1~5)Δt. Within the film travel time T, the number of times the second free end 212 of the oscillating member 21 leaves the first sensor 311 is named K. When K≥1, the oscillating member 21 is moved, and the film travel path is considered to be inward (e.g., ...). Figure 21 As shown), the device needs to move outward a distance Dm, which can be 0.5–2 mm. A single movement is triggered only once per detection time interval T. If K is still greater than 1 at the next T, the device continues to move outward by Dm. If K equals 0 at the next T and the oscillating element 21 does not oscillate, the film path is considered to be outward (e.g., ...). Figure 19 As shown), it needs to move inward by Dm. Therefore, the actual film path (the actual film path position of the air cushion film 40 is the line connecting the ends of all the sealing lines 41 of the film near the first sensor 311, such as...) Figures 19 to 21 As shown, it fluctuates around the ideal membrane path, and is in dynamic adjustment throughout the entire process without stopping.

[0073] Preferably, the detection structure for correcting the film movement of the air cushion machine further includes a timer. The timer can be used, for example, to calculate the measured time interval Td between when the first sensor 311 detects that the second free end 212 of the motion module 20 leaves its original position and when it detects that the second free end 212 of the motion module 20 returns to its original position. The time point when the first sensor 311 detects that the second free end 212 of the swing member 21 leaves its original position is T1 (for example, the time point when the second free end 212 of the swing member 21 leaves the first sensor 311 is T1), and the time point when the first sensor 311 detects that the second free end 212 of the swing member 21 returns to its original position is T2. The measured time interval Td = T2 - T1. The measured time interval Td is proportional to the swing amplitude. Based on the measured time interval Td, it can be determined whether the air cushion film 40 falls on the ideal film movement path when it moves along the film movement path. For example, if the preset time interval is [Ta, Tb], and the measured time interval Td falls within the preset theoretical time range, it can be determined that the membrane is on the ideal membrane path; if the measured time interval Td is greater than the preset theoretical time range (i.e., Td > Tb), it can be determined that the membrane is in a position closer to the inner part of the ideal membrane path; if the measured time interval Td is less than the preset theoretical time range (i.e., Td < Ta), it can be determined that the membrane is in a position closer to the outer part of the ideal membrane path.

[0074] Figures 22 to 23 The diagram schematically illustrates a detection structure for correcting the film movement of an air cushion machine according to a fourth embodiment of the present invention.

[0075] like Figures 22 to 23 As shown, the main difference between this embodiment and the first embodiment is that: instead of a first sensor 311 and a second sensor 312, a second detection unit 32 is provided. The second detection unit 32 is configured to detect the angle of the swing of the first free end 211 of the swing member 21 relative to the air cushion film 40 (hereinafter referred to as the film); or the second detection unit 32 is configured to detect the rotation angle of the shaft 213 of the swing member 21 (both methods can reflect the swing angle of the swing member 21). Thus, the position of the swing member 21 can be determined by detecting the swing angle of the swing member 21 through the second detection unit 32.

[0076] As one implementation of the second detection unit 32, the second detection unit 32 is an encoder, so as to ensure that the detection structure used for the film-tracking correction of the air cushion machine is simple and compact, and to ensure the miniaturization of the detection structure used for the film-tracking correction of the air cushion machine, thus simplifying the maintenance process.

[0077] In some embodiments, the detection structure for correcting the film deviation of the air cushion machine further includes a control module 50; the control module 50 is configured to output the film's deflection state by comparing the angle of the first free end 211 of the oscillating member 21 relative to the film detected by the second detection unit 32 with a set angle, thereby simplifying the detection method of the oscillating member 21. Figure 23 As shown, the set angle can be, for example, the angle A between the swing member 21 in the first position and the second position when the membrane is on the ideal membrane path. When the second detection unit 32 detects that the swing angle of the swing member 21 is less than A, it means that the swing amplitude of the swing member 21 is small and the membrane is on the outer side, and the membrane needs to be moved inward to make the membrane approach the ideal membrane path. When the second detection unit 32 detects that the swing angle of the swing member 21 is equal to A, it means that the membrane is on the ideal membrane path. When the second detection unit 32 detects that the swing angle of the swing member 21 is greater than A, it means that the swing amplitude of the swing member 21 is large and the membrane is on the inner side, and the membrane needs to be moved outward to make the membrane approach the ideal membrane path.

[0078] In some embodiments, the second detection unit 32 constitutes the detection module 30 of an embodiment of this application.

[0079] In some embodiments, the first detection unit 31 and the second detection unit 32 constitute a detection module 30 of an embodiment of this application.

[0080] According to another aspect of this application, a detection method for correcting the film movement of an air cushion machine is provided, which uses the aforementioned detection structure for correcting the film movement of an air cushion machine to detect the film movement path of the air cushion machine. Thus, the actual film movement position of the air cushion film 40 (hereinafter referred to as the film) can be determined by the detection structure for correcting the film movement of the air cushion machine (the actual film movement position of the air cushion film 40 is the line connecting all the sealing lines 41 of the film near the end of the second detection unit 32, such as...). Figures 22 to 23 (As shown), so that the operator can determine whether the membrane is off-center based on the actual position of the membrane and adjust the membrane to the ideal path.

[0081] According to another aspect of this application, another detection method for correcting the deviation of the air cushion film is provided, which includes a motion module 20 that is installed when the air cushion film 40 (hereinafter referred to as the film) moves along the film path and is able to move under the force of the sealing line 41 of the film, and the motion module 20 is configured to return to its original position after the force of the sealing line 41 of the film is removed; in conjunction with the setting position of the swing member 21, a detection module 30 is set and configured to determine the actual film path position of the film based on the detected position of the motion module 20.

[0082] Therefore, the detection module 30 can detect whether the motion module 20 is driven by the membrane sealing line 41, and the position of the motion module 20 driven by the membrane sealing line 41, to determine the actual membrane running position, so that the operator can determine whether the membrane is deviated based on the actual position of the membrane and adjust the membrane to the ideal running path.

[0083] In some embodiments, the detection module 30 is configured to determine the position of the membrane based on the detected position of the motion module 20. This is achieved by the detection module 30 determining the membrane position by detecting the position of the motion module 20 at at least one of the following: before, during, and after the motion module 20 is subjected to the force of the membrane's sealing line 41. Therefore, by adjusting the position of the motion module 20, the detection module 30 can determine the membrane position simply by detecting the position of the motion module 20.

[0084] In this invention, the connection or installation is a fixed connection unless otherwise specified. A fixed connection can be implemented as a detachable or non-detachable connection commonly used in the prior art. A detachable connection can be implemented using existing technologies, such as threaded connections or keyed connections. A non-detachable connection can also be implemented using existing technologies, such as welding or adhesive bonding.

[0085] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A detection structure for correcting the film movement of an air cushion machine, characterized in that, include: The motion module (20) includes a first reset unit (22) and a swinging member (21) or a moving member (23); The detection module (30) and the oscillating member (21) or moving member (23) are configured such that the detection module (30) is configured to determine the position of the air cushion film (40) based on the detected position of the oscillating member (21) or moving member (23); The swing member (21) and the moving member (23) are configured such that when the air cushion film (40) of the air cushion machine moves along the film-walking path, the swing member (21) can swing relative to the air cushion film (40) about the pivot (213) of the swing member (21) under the force of the sealing line (41) of the air cushion film (40), and the moving member (23) can move relative to the air cushion film (40) under the force of the sealing line (41) of the air cushion film (40). The first reset unit (22), the swing member (21), and the moving member (23) are further configured such that after the force exerted by the sealing line (41) of the air cushion film (40) on the swing member (21) and the moving member (23) is removed, the first reset unit (22) can drive the swing member (21) and the moving member (23) to return to their original positions.

2. The detection structure for film walking correction of air cushion machine according to claim 1, characterized in that, The detection module (30) is configured to determine the position of the air cushion film (40) based on the detected position of the oscillating member (21) or the moving member (23), wherein the detection module (30) is able to determine the position of the air cushion film (40) based on the detected position of the oscillating member (21) or the moving member (23) before, during and after being subjected to the force of the sealing line (41) of the air cushion film (40).

3. The detection structure for film walking correction of air cushion machine according to claim 2, characterized in that, The detection module (30) includes at least one of a first detection unit (31) and a second detection unit (32); the first detection unit (31) is used to detect the position of at least one of the first free end (211) and the second free end (212) of the swing member (21); the second detection unit (32) is used to detect the angle of the swing of the first free end (211) of the swing member (21) relative to the air cushion film (40).

4. The detection structure for film walking deviation correction of air cushion machine according to claim 3, characterized in that, The first detection unit (31) includes at least one of a first sensor (311) and a second sensor (312). The first sensor (311) is configured to detect either the first free end (211) or the second free end (212) of the swing member (21) located in its original position. The second sensor (312) is configured to detect either the first free end (211) or the second free end (212) of the swing member (21) that has just been subjected to the force of the sealing line (41) of the air cushion film (40); and / or The first reset unit (22) is an elastic element that can restore the swinging element (21) to its original position.

5. The detection structure for film walking correction of air bearing machine according to claim 4, characterized in that, It also includes a control module (50); The control module (50) is configured to output the yaw state of the air cushion membrane (40) based on a comparison of the number of times that at least one of the first sensor (311) or the second sensor (312) detects the first free end (211) or the second free end (212) of the oscillating member (21) with a set value; and / or The control module (50) is configured to output the sway state of the air cushion membrane (40) by comparing the angle of the first free end (211) of the swing member (21) relative to the air cushion membrane (40) detected by the second detection unit (32) with a set angle.

6. The detection structure for film walking correction of air bearing machine according to claim 4, characterized in that, It also includes a control module (50); The first sensor (311) detects the second free end (212) of the swing member (21) leaving its original position and the second free end (212) of the swing member (21) returning to its original position. The measured time interval is Td. The control module (50) is configured to compare the measured time interval Td with a preset theoretical time range.

7. The detection structure for film walking correction of air cushion machine according to claim 5 or 6, characterized in that, The elastic element is a torsion spring.

8. The detection structure for film deviation correction in an air cushion machine according to claim 5 or 6, characterized in that, The second detection unit (32) is an encoder.

9. The detection structure for film walking correction of air cushion machine according to any one of claims 4 to 6, characterized in that, At least one of the first sensor (311) and the second sensor (312) is disposed at a position corresponding to one of the first free end (211) and the second free end (212) of the oscillating member (21) when the air cushion membrane (40) is located in the ideal path of the membrane.

10. The detection structure for film walking correction of air cushion machine according to any one of claims 4 to 6, characterized in that, At least one of the first sensor (311) and the second sensor (312) is a photoelectric sensor or a proximity switch.

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