Heat sealing transmission mechanism and gas cushion machine

Abstract

Disclosed in the present invention are a heat sealing transmission mechanism and a gas cushion machine. The heat sealing transmission mechanism comprises a wheel body and a plurality of heating elements, the heating elements being wound on the periphery of the wheel body, a gap being present between two corner positions of each heating element, and the gaps of at least two heating elements being circumferentially offset on the projection surface in the axial direction of the wheel body. The gas cushion machine comprises a driving part and a heat sealing transmission mechanism. The heating elements form at least two heat sealing lines on a thin film layer, the two corner positions of each heating element form a pair of heat sealing line ends on the thin film layer, gas sealed in a gas chamber generates pressing force on both the two heat sealing line ends at the positions of the pair of heat sealing line ends close to the gas chamber, and the two heat sealing line ends equally share the pressing force, so as to reduce the pressing force borne by each heat sealing line end position, thereby reducing the possibility of poor heat seal at the heat sealing line end positions to the maximum extent. Accordingly, even if sealed gas leaks out through a gap between the pair of heat sealing line ends close to the gas chamber, the leaked gas will be blocked by at least one heat sealing line.

Description

Heat sealing transmission mechanism and air cushion machine Technical Field

[0001] The invention relates to a heat sealing transmission mechanism and an air cushion machine. Background Art

[0002] In the field of logistics, the use of cushioning air cushions or bubble bags to pack items has become increasingly popular. Existing cushioning air cushion machines use a compression heat sealing method to seal the inflated air cushion film or bubble bag. Basically, heating wires are used to compress and heat seal the inflation port of the air cushion film or bubble bag.

[0003] US Patent No. US10899523B2 discloses a method for heat-sealing juxtaposed film layers using a sealing device. The sealing device comprises a rotatable support cylinder having an outer circumferential surface, a heating element disposed around at least a portion of the outer surface and fixed thereto so as to rotate therewith, the heating element being wound one or more times around the outer surface in a partially overlapping spiral pattern. The juxtaposed film layers are sealed by rotating the sealing device into contact with the juxtaposed film layers and heating the heating element to a temperature sufficient to seal the film layers together. However, this arrangement of the heating element presents the following problems when heat-sealing the film layers:

[0004] Since the heating element is wound around the surface of the supporting cylinder more than once in a spiral manner, the two bends 188 and 190 of the heating element on the surface of the supporting cylinder (FIG.18 in the U.S. invention patent No. US10899523B2) are distributed along the axial direction of the supporting cylinder. The two bends 188 and 190 of the heating element on the surface of the supporting cylinder are not located on the same radial cross section perpendicular to the axis of the supporting cylinder. This will result in a separate heat sealing line head in the area near the heat sealing line in some air chambers, as shown in FIG1 of the specification (i.e., FIG18 in the U.S. invention patent No. US10899523B2). The heat sealing thread head 178 shown in FIG. 20 of the patent forms a heat sealing gap with the adjacent heat sealing line 174. In this way, during extrusion, the gas sealed in the air chamber will generate a concentrated extrusion force at the separate heat sealing thread head 178, so that the separate heat sealing thread head 178 will form a distortion deformation tendency. This extrusion force can easily cause the heat sealing line where the heat sealing thread head 178 is located to have a poor heat seal and break at the heat sealing thread head 178, causing the gas in the air chamber to leak from this location. It may also further affect the sealing effect of the adjacent heat sealing line 174 on the film layer, which can easily lead to the appearance of poorly sealed products.

[0005] The Chinese invention patent No. 201510663017.X discloses a heat-sealing device with a heating wire divided into two sections. Each section is semicircular and evenly wound around the circumference of the first roller. The two sections of semicircular heating wire are wound around each other, which also achieves a heat-sealing effect. The heat generated by the heating wire is transferred to the air cushion film roll to achieve heat sealing. However, this arrangement of the heating wires presents the following problems when heat-sealing the air cushion film roll:

[0006] Since the heating wire adopts a two-section semi-circular structure, each section is semicircular and is wound around the wheel wall surface of the first roller in the circumferential direction, the two sections of semi-circular heating wire will be distributed along the axial direction of the first roller and arranged relatively. The two sections of semi-circular heating wire will not be on the same radial cross-section perpendicular to the axis of the first roller. As shown in Figure 2 of the specification, the bends of the two sections of semi-circular heating wire will form heat-sealing thread heads 1 and 2 on the air cushion roll film. The heat-sealing thread heads 1 and 2 are distributed along the axial direction of the first roller (as shown in the left and right directions in Figure 2 of the specification). The two heat-sealing thread heads 1 and 2 will form a heat-sealing drop. In this way, during extrusion, the gas sealed in the air chamber will generate a concentrated extrusion force at the heat-sealing thread head 2 near the air chamber, resulting in the heat-sealing thread head 1 and 2 show a tendency of twisting deformation, and the extrusion force can easily cause the heat sealing wire 3 where the heat sealing wire head 2 is located to have a poor heat seal and break at the heat sealing wire head 2, causing the gas in the air chamber to leak out from this location. Moreover, since the two sections of half-circle heating wire are in different radial cross-sections, when a poor heat seal occurs at a heat sealing wire head 2 close to the air chamber (such as the two layers of air cushion roll film at this location are separated), the gas in the air chamber will directly leak out in the direction F, which is opposite to the direction of inflation in the air chamber, causing the air cushion roll film to become a defective product.

[0007] Therefore, how to overcome the above technical deficiencies is a technical problem that needs to be solved urgently by those skilled in the art.

[0008] Summary of the Invention

[0009] The purpose of the present invention is to provide a heat sealing transmission mechanism and an air cushion machine.

[0010] According to one aspect of the present invention, a heat sealing transmission mechanism is provided, comprising:

[0011] a rotatable wheel; and

[0012] Multiple heating elements are wound around the outer periphery of the wheel body, and a gap is formed between two corners of the heating elements on the outer periphery of the wheel body. The gaps of at least two heating elements on the outer periphery of the wheel body are staggered along the circumferential direction on the axial projection surface of the wheel body.

[0013] The laminated film layers are sealed together by contacting the wheel with the laminated film layers and heating the heating element to a temperature sufficient to seal the film layers together.

[0014] According to the technical solution of the present invention, the wheel body is in contact with the stacked film layers (i.e., the cushioning air cushion or bubble bag that needs to be heat-sealed). When the heating element is heated to a temperature sufficient to seal the film layers together, as the wheel body rotates, the heat generated by the heating element is transferred to the stacked film layers to seal the stacked film layers together. Since there are multiple heating elements, the heating elements form at least two heat-sealing lines on the film layers along the axis of the wheel body, and the two corners of each heating element will form a pair of heat-sealing thread heads on the film layer. The gas sealed in the air chamber will generate an extrusion force on the two heat-sealing thread heads near the air chamber. Since the two heat-sealing thread heads are on the same heat-sealing line, the two heat-sealing thread heads will The extrusion force of the sealing gas in the air chamber is evenly distributed without generating distortion, so that the extrusion force of the sealing gas in the air chamber on the two heat-sealing threads can achieve a balanced effect, and the extrusion force on each heat-sealing thread is reduced, thereby minimizing the possibility of poor heat sealing and damage at the heat-sealing thread. Moreover, since the gaps between at least two heating elements on the outer periphery of the wheel body are staggered along the circumferential direction on the axial projection surface of the wheel body, even if the sealing gas in the air chamber leaks through the tiny gap between a pair of heat-sealing threads close to the air chamber, the leaked gas will be blocked by at least one heat-sealing thread, and will not leak directly through the gaps between the heat-sealing threads on all the heat-sealing threads, thereby ensuring the sealing effect to the greatest extent.

[0015] In some embodiments, there can be two heating elements, which are arranged in parallel and whose gaps on the outer periphery of the wheel body are located on opposite sides of the wheel body. Thus, the two heating elements form two parallel heat-sealing lines on the film layer, and the gaps between the two heating elements on the outer periphery of the wheel body are located on opposite sides of the wheel body. This ensures that the distance between the pair of heat-sealing thread ends on one heat-sealing line and the pair of heat-sealing thread ends on the other heat-sealing line is maximized, minimizing the risk of gas leaking from the gap between the pair of heat-sealing thread ends near the air chamber and then leaking again from the gap between the pair of heat-sealing thread ends on the heat-sealing line away from the air chamber, thereby maximizing the sealing effect on the air chamber.

[0016] In some embodiments, a first notch and a second notch may be provided on the outer circumference of the wheel body. The two ends of one heating element are inserted into the first notch, and the two ends of the other heating element are inserted into the second notch. The first notch is located near one end of the wheel body, and the second notch is located near the other end of the wheel body. Thus, the first notch and the second notch near the ends facilitate securing the ends of the heating elements after winding the two heating elements around the wheel body, as well as facilitating removal and replacement of the heating elements.

[0017] In some embodiments, the two ends of the heating element can be inserted into the outer periphery of the wheel body. Thus, after the two heating elements are wrapped around the wheel body, the two ends of the heating elements are inserted into the wheel body for fixing, which can ensure that the heating elements are not easy to get loose during use.

[0018] In some embodiments, the plane where the heating element is located can be perpendicular to the axial direction of the wheel body. This ensures that the heat seal line formed by the heating element on the film layer is always straight, so that the two heat seal ends of each pair of heat seal ends on the heat seal line can evenly share the squeezing force of the sealing gas in the air chamber without causing distortion, thereby ensuring a good sealing effect.

[0019] In some embodiments, the outer circumference of the wheel body may be provided with receiving grooves for accommodating the heating elements. The number of receiving grooves is equal to the number of heating elements. The heating elements are accommodated in the receiving grooves, and the surface of the heating elements is not lower than the outer circumference of the wheel body. Thus, the heating elements are accommodated in the receiving grooves to prevent displacement of the heating elements during use, which may affect the heat sealing effect.

[0020] In some embodiments, the wheel may further include two first springs and two second springs provided on the wheel body.

[0021] One end of the two first springs is fixed to the wheel body, and the other end of the two first springs is connected to one end of the two heating elements respectively.

[0022] One ends of the two second springs are fixed on the wheel body, and the other ends of the two second springs are respectively connected to the other ends of the two heating elements.

[0023] Thus, the first spring and the second spring can ensure that the heating element is tightened on the outer periphery of the wheel body, so that the heating element will not get loose or shift during use.

[0024] In some embodiments, the wheel may further include a first conductive sheet, a second conductive sheet, a third conductive sheet, and a fourth conductive sheet.

[0025] One end of the first conductive sheet is disposed on one end of the first heating element, and one end of the second conductive sheet is disposed on the other end of the heating element.

[0026] One end of the third conductive sheet is arranged on one end of the second heating element, and one end of the fourth conductive sheet is arranged on the other end of the heating element.

[0027] Thus, the first heating element can be energized and heated to a temperature sufficient to seal the film layers together through the first and second conductive sheets, and the second heating element can be energized and heated to a temperature sufficient to seal the film layers together through the third and fourth conductive sheets.

[0028] In some embodiments, the wheel body may further include a first terminal and a second terminal, the other end of the second conductive sheet being connected to the other end of the fourth conductive sheet so that the two heating elements are connected in series, the other end of the first conductive sheet being disposed on the first terminal, and the other end of the third conductive sheet being disposed on the second terminal. Thus, the two heating elements are connected in series simply by connecting the first and third conductive sheets to a power line, thereby optimizing the layout of the circuits on the wheel body. Furthermore, as long as the resistance values ​​of the two heating elements in series are the same, the temperatures of the two heating elements can be kept consistent, ensuring consistent heat seal quality of the two heat seal lines formed on the film layer by the two heating elements, and also ensuring consistent appearance of the heat-sealed cushion or bubble bag.

[0029] According to another aspect of the present invention, an air cushion machine is provided, comprising a driving component and the aforementioned heat sealing transmission mechanism, wherein the driving component drives the wheel body to rotate.

[0030] The air cushion machine of the present invention has a wheel body in contact with the stacked film layers. When the heating element is heated to a temperature sufficient to seal the film layers together, the driving component drives the wheel body to rotate, and the heat generated by the heating element is transferred to the stacked film layers to seal the stacked film layers together. The heating element forms at least two heat-sealing lines on the film layers along the axis of the wheel body. The two corners of each heating element form a pair of heat-sealing line heads on the film layer. The two heat-sealing line heads evenly share the extrusion force of the sealing gas in the air chamber without generating distortion, thereby making the air chamber airtight. The extrusion force of the sealing gas on the two heat-sealing threads can achieve a balanced effect, and the extrusion force on each heat-sealing thread is reduced, thereby minimizing the possibility of poor heat sealing and damage at the heat-sealing thread. Moreover, even if the sealing gas in the air chamber leaks through the tiny gap between a pair of heat-sealing threads close to the air chamber, the leaked gas will be blocked by at least one heat-sealing thread and will not leak directly through the gaps between the heat-sealing threads on all the heat-sealing threads, thereby ensuring the sealing effect of the buffer air cushion or bubble bag after heat sealing to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is FIG. 20 in the U.S. invention patent No. US10899523B2;

[0032] FIG2 is a diagram showing the heat sealing effect of the air cushion roll film after the first roller heat seals the air cushion roll film in the Chinese invention patent No. 201510663017.X;

[0033] FIG3 is a schematic structural diagram of a heat sealing transmission mechanism according to an embodiment of the present invention;

[0034] FIG4 is a schematic structural diagram of the heat sealing transmission mechanism shown in FIG3 along direction A;

[0035] FIG5 is a rear view of the heat sealing transmission mechanism shown in FIG4;

[0036] FIG6 is a bottom view of the heat sealing transmission mechanism shown in FIG5;

[0037] FIG7 is a rear view of the heat sealing transmission mechanism shown in FIG6;

[0038] FIG8 is a schematic structural diagram of the wheel body in the heat sealing transmission mechanism shown in FIG3;

[0039] FIG9 is a side view of the heat sealing transmission mechanism shown in FIG3;

[0040] FIG10 is a diagram showing the heat sealing effect after the heat sealing transmission mechanism shown in FIG3 heat seals the buffer air cushion or bubble bag. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features referred to.

[0043] 3 to 9 schematically show the structure of a heat sealing transmission mechanism according to an embodiment of the present invention.

[0044] Referring to Figures 3 to 9, a heat sealing transmission mechanism includes a wheel body 1 and a heating element 2. Furthermore, the heat sealing transmission mechanism may also include a first spring 3, a second spring 4, a first conductive sheet 5, a second conductive sheet 6, a third conductive sheet 7, a fourth conductive sheet 8, a first terminal 9, a second terminal 10, and a third terminal 111.

[0045] The wheel body 1 can be driven to rotate by a driving component, which can be a motor.

[0046] Referring to Figures 3, 6, 7, and 9, the heating element 2 is wound around the outer circumference of the wheel body 1. There are multiple heating elements 2. In this embodiment, the number of heating elements 2 is preferably two. The two heating elements 2 are wound in parallel around the outer circumference of the wheel body 1. Each heating element 2 is wound around the outer circumference of the wheel body 1 once. The two heating elements 2 can form two parallel heat-sealing lines on the film layer of the cushioning air cushion or bubble bag. In other embodiments, the number of heating elements 2 can be adaptively adjusted according to the heat sealing requirements.

[0047] 6 and 7 , the plane where the two heating elements 2 are located is perpendicular to the axial direction of the wheel body 1. This ensures that the heat-sealing line formed by the heating element 2 on the film layer of the cushioning air cushion or bubble bag is always straight, so that the two heat-sealing thread heads at each pair of heat-sealing thread heads on the heat-sealing line can evenly share the extrusion force of the sealing gas in the air chamber without causing distortion, thereby ensuring the sealing effect.

[0048] Referring to FIG6 , a gap 201 is formed between the two corner positions 21 on the outer periphery of the wheel body 1 of the upper heating element 2. Referring to FIG7 , a gap 201 is also formed between the two corner positions 21 on the outer periphery of the wheel body 1 of the lower heating element 2. It should be noted that since the two ends of the same heating element 2 cannot touch, otherwise a short circuit will occur, there will inevitably be a gap between the two corner positions 21 on the outer periphery of each heating element 2, and there will inevitably be multiple pairs of heat-sealing thread ends on the heat-sealing line formed on the film layer by the two corner positions 21 of the heating element 2. In order to improve the sealing effect, it is necessary to ensure that the gap 201 between the two corner positions 21 on the outer periphery of the heating element 2 is sufficiently small, that is, to ensure that the gap between the two heat-sealing thread ends in a pair of heat-sealing thread ends is sufficiently small.

[0049] In this embodiment, the heating element 2 is preferably flat, which ensures that the heat-sealed line of the cushioning air cushion or bubble bag film layer has a certain width after heat sealing, thereby ensuring a good seal. In other embodiments, the heating element 2 can be designed in other shapes according to the heat sealing requirements, as long as the heat sealing effect and good seal are ensured.

[0050] Referring to Figure 8, a receiving groove 13 is formed on the outer periphery of the wheel body 1. The receiving groove 13 is used to receive the heating element 2. The number of the receiving grooves 13 is the same as the number of the heating elements 2. Each receiving groove 13 receives one heating element 2. The heating element 2 is received in the receiving groove 13 to prevent the heating element 2 from shifting during use and affecting the heat sealing effect. When the outer peripheral surface of the wheel body 1 is made of a hard material, after the heating element 2 is received in the receiving groove 13, the surface of the heating element 2 is not lower than the outer peripheral surface of the wheel body 1, ensuring that the heating element 2 can be heat-sealed to the film layer of the buffer air cushion or bubble bag. When the outer peripheral surface of the wheel body 1 is made of an elastic material, after the heating element 2 is received in the receiving groove 13, the surface of the heating element 2 can also be slightly lower than the outer peripheral surface of the wheel body 1. In this way, when the wheel body 1 is pressed onto the film layer of the buffer air cushion or bubble bag, after the outer periphery of the wheel body 1 is squeezed, the heating element 2 in the receiving groove 13 can also be heat-sealed to the film layer of the buffer air cushion or bubble bag.

[0051] A layer of anti-scalding tape can also be pasted on the surface of the heating element 2.

[0052] 3 , 6 , 7 and 9 , the gap 201 between the two bends 21 of one heating element 2 and the gap 201 between the two bends 21 of the other heating element 2 are staggered in the circumferential direction on the axial projection surface of the wheel body 1 , that is, the gap 201 between the two bends 21 of one heating element 2 and the gap 201 between the two bends 21 of the other heating element 2 are not aligned on the outer periphery of the wheel body 1 ; the heat sealing lines formed by the two heating elements 2 on the film layer of the cushioning air cushion or bubble bag are two along the axial direction of the wheel body 1 , and the two bends 21 of each heating element 2 will form a pair of heat sealing thread heads on the film layer, and the gas sealed in the air chamber of the cushioning air cushion or bubble bag will generate an extrusion force on the two heat sealing thread heads at a pair of heat sealing thread heads near the air chamber, and the two heat sealing thread heads will generate an extrusion force on the two heat sealing thread heads due to being in a On the same heat sealing line, the two heat sealing heads will evenly share the extrusion force of the sealing gas in the air chamber without generating any twisting deformation, so that the extrusion force of the sealing gas in the air chamber on the two heat sealing heads can achieve a balanced effect, and the extrusion force on each heat sealing head is reduced, thereby minimizing the possibility of poor heat sealing and damage at the heat sealing heads. Moreover, since the gaps 201 between the two heating elements 2 on the outer periphery of the wheel body 1 are staggered along the circumferential direction on the axial projection surface of the wheel body 1, even if the sealing gas in the air chamber of the buffer air cushion or bubble bag leaks through the tiny gap between a pair of heat sealing heads close to the air chamber, the leaked gas will be blocked by at least one heat sealing line, and will not leak directly through the gaps between the heat sealing heads on all heat sealing lines, thereby ensuring the sealing effect to the greatest extent.

[0053] In other embodiments, when the number of heating elements 2 is N (N≥3), the gaps 201 between the two corner positions 21 of each heating element 2 can be staggered on the outer circumference of the wheel body 1, or N-1 gaps 201 can be aligned on the outer circumference of the wheel body 1. As long as the gaps 201 between the two corner positions 21 of two heating elements 2 are staggered on the outer circumference of the wheel body 1, it is ensured that the gaps 201 between the two corner positions 21 of at least two heating elements 2 are staggered on the outer circumference of the wheel body 1, and it is ensured that the gaps 201 between the two corner positions 21 of N heating elements 2 are not aligned on the outer circumference of the wheel body 1. In this way, even if the sealing gas in the air chamber of the buffer air cushion or bubble bag leaks through the tiny gap between a pair of heat sealing thread heads close to the air chamber, the leaked gas will be blocked by at least one heat sealing line and will not leak directly through the gaps between the heat sealing thread heads on all heat sealing lines, thereby ensuring the sealing effect to the greatest extent.

[0054] 7 , the second notch 12 is close to the lower end of the wheel body 1 , and the first notch 11 and the second notch 12 are respectively located on opposite sides of the wheel body 1 , and the two ends of a heating element 2 are inserted into the first notch 11 , that is, the heating element 2 is bent at the first notch 11 to form two angled positions 21 , and the two angled positions 21 do not contact each other, and a gap 201 is formed between the two angled positions 21 to avoid short circuit. The two ends of the other heating element 2 are inserted into the second notch 12 , that is, the heating element 2 is bent at the second notch 12 to form two angled positions 21 , and the two angled positions 21 do not contact each other, and a gap 201 is formed between the two angled positions 21 to avoid short circuit. The first notch 11 and the second notch 12 are respectively close to the upper end and the lower end of the wheel body 1 , which makes it convenient to align the two heating elements 2 after winding them around the wheel body 1 The ends of the heating element 2 are fixed and the heating element 2 can be easily disassembled and replaced; since the first notch 11 and the second notch 12 are respectively located on opposite sides of the wheel body 1, the two bent corners 21 of one heating element 2 on the outer circumference of the wheel body 1 and the two bent corners 21 of the other heating element 2 on the outer circumference of the wheel body 1 are respectively located on opposite sides of the wheel body 1, that is, the gaps 201 of the two heating elements 2 on the outer circumference of the wheel body 1 are arranged 180 degrees relative to each other in the circumferential direction on the axial projection surface of the wheel body 1. In this way, it can be ensured that the distance between a pair of heat sealing thread heads on one of the two heat sealing lines formed by the two heating elements 2 on the film layer of the buffer air cushion or bubble bag and the pair of heat sealing thread heads on the other heat sealing line is maximized, thereby minimizing the gas leaking from the tiny gap between the pair of heat sealing thread heads close to the air chamber and then directly leaking from the tiny gap between the pair of heat sealing thread heads on the heat sealing line away from the air chamber, thereby ensuring the sealing effect of the air chamber to the greatest extent.

[0055] In this embodiment, the two ends of one heating element 2 are inserted into the first notch 11, and the two ends of the other heating element 2 are inserted into the second notch 12. In other embodiments, the two ends of the heating element 2 may also be directly inserted into the outer periphery of the wheel body 1, that is, two oppositely arranged through-holes are formed on the outer periphery of the wheel body 1, the two ends of one heating element 2 are inserted into one through-hole, that is, the heating element 2 is also bent at the through-hole to form two angled positions 21, and the two angled positions 21 do not contact each other to avoid short circuits, and the two ends of the other heating element 2 are inserted into the other through-hole, that is, the heating element 2 is also bent at the through-hole to form two angled positions 21, and the two angled positions 21 do not contact each other to avoid short circuits.

[0056] There are two first springs 3 and two second springs 4. One end of one first spring 3 is fixed to the wheel body 1, and the other end of the first spring 3 is connected to one end of a heating element 2. One end of one second spring 4 is fixed to the wheel body 1, and the other end of the second spring 4 is connected to the other end of the aforementioned heating element 2. Another end of another first spring 3 is fixed to the wheel body 1, and the other end of the first spring 3 is connected to one end of another heating element 2. Another end of another second spring 4 is fixed to the wheel body 1, and the other end of the second spring 4 is connected to the other end of the aforementioned heating element 2. The installation relationship between the first spring 3, the second spring 4 and the wheel body 1 can be specifically as follows: Referring to Figures 3 and 8, a first accommodating chamber 14 and a second accommodating chamber 15 are formed on the upper end surface of the wheel body 1. The first accommodating chamber 14 is communicated with the first notch 11, and the second accommodating chamber 15 is also communicated with the first notch 11. Referring to Figure 5, a first spring 3 is accommodated in the second accommodating chamber 15, one end of the first spring 3 is fixed to the bottom wall of the second accommodating chamber 15 by a first screw 31, and the other end of the first spring 3 is connected to one end of a heating element 2, and a second spring 4 is accommodated in the first accommodating chamber 14, one end of the second spring 4 is fixed to the bottom wall of the first accommodating chamber 14 by a second screw 41, and the other end of the second spring 4 is connected to the other end of the aforementioned heating element 2 (the heating element 2 connected to the first spring 3). The first spring 3 and the second spring 4 can ensure that the heating element 2 is tightened on the outer periphery of the wheel body 1, so that the heating element 2 is tightened during use. 9, a third accommodating chamber 16 and a fourth accommodating chamber 17 are formed on the lower end surface of the wheel body 1, the third accommodating chamber 16 is communicated with the second notch 12, and the fourth accommodating chamber 17 is also communicated with the second notch 12. Referring to Figures 4 and 9, the second first spring 3 is accommodated in the fourth accommodating chamber 17, one end of the first spring 3 is fixed to the bottom wall of the fourth accommodating chamber 17 by a first screw 31, the other end of the first spring 3 is connected to one end of the second heating element 2, and the second second spring 4 is accommodated in the third accommodating chamber 16, one end of the second spring 4 is fixed to the bottom wall of the third accommodating chamber 16 by a second screw 41, and the other end of the second spring 4 is connected to the other end of the aforementioned heating element 2 (the heating element 2 connected to the second first spring 3). The first spring 3 and the second spring 4 can ensure that the heating element 2 is tightened on the outer periphery of the wheel body 1, so that the heating element 2 will not loosen or shift during use;In addition, the length of the first spring 3 can be smaller than the length of the second spring 4, and the tensile strength of the first spring 3 is greater than the tensile strength of the second spring 4. In this way, when installing the heating element 2, the first spring 3 can be fixed in the second accommodating chamber 15 / fourth accommodating chamber 17 by the first screw 31 and the second spring 4 can be fixed in the first accommodating chamber 14 / third accommodating chamber 16 by the second screw 41, and then one end of a heating element 2 can be installed on a first spring 3, and then the heating element 2 can be wrapped around the outer periphery of the wheel body 1, and then the corresponding second spring 4 can be stretched, and the other end of the heating element 2 can be installed on the second spring 4, and one end of the second heating element 2 can be installed on the second first spring 3, and then the heating element 2 can be wrapped around the wheel body 1. The outer circumference of the wheel body 1 is then stretched, and the corresponding second spring 4 is then stretched. The other end of the heating element 2 is then mounted on the second second spring 4. Because the tensile strength of the second spring 4 is lower than that of the first spring 3, the second spring 4 is more easily stretched and connected to the heating element 2 when the other end of the heating element 2 is installed. When removing the heating element 2, the second spring 4 is first stretched, and then the heating element 2 is removed from the second spring 4. The heating element 2 is then removed from the first spring 3. The tensile strength of the first spring 3 is greater than that of the second spring 4. This ensures that the heating element 2 is tightened and that the installation and removal of the heating element 2 are very convenient. At the same time, the shorter length of the first spring 3 than the second spring 4 can also save layout space on the wheel body 1.

[0057] Referring to Figures 3 to 5, one end of the first conductive sheet 5 passes through the wheel body 1 and is connected to one end of the first heating element 2. One end of the first conductive sheet 5 can be welded to one end of the first heating element 2 and then fixed together on the first second spring 4. One end of the second conductive sheet 6 passes through the wheel body 1 and is connected to the other end of the aforementioned first heating element 2. One end of the second conductive sheet 6 can be welded to the other end of the aforementioned first heating element 2 and then fixed together on the first first spring 3; one end of the third conductive sheet 7 is connected to one end of the second heating element 2. One end of the third conductive sheet 7 can be welded to one end of the second heating element 2 and then fixed together on the second first spring 3. One end of the fourth conductive sheet 8 is connected to the other end of the aforementioned second heating element 2. One end of the fourth conductive sheet 8 It can be welded to the other end of the aforementioned second heating element 2 and then fixed together on the second second spring 4; the first conductive sheet 5, the second conductive sheet 6, the third conductive sheet 7, and the fourth conductive sheet 8 are all arranged in a flat shape on the end surface of the wheel body 1, and one end of the first conductive sheet 5 and the second conductive sheet 6 is bent and passed through the wheel body 1, one end of the third conductive sheet 7 is bent and inserted into the second accommodating cavity 15, and one end of the fourth conductive sheet 8 is bent and inserted into the first accommodating cavity 14. The first conductive sheet 5 and the second conductive sheet 6 can be used to energize the first heating element 2 and heat it to a temperature sufficient to seal the film layer of the cushioning air cushion or bubble bag together, and the third conductive sheet 7 and the fourth conductive sheet 8 can be used to energize the second heating element 2 and heat it to a temperature sufficient to seal the film layer of the cushioning air cushion or bubble bag together.

[0058] Referring to Figures 3 and 9, the first terminal 9, the second terminal 10, and the third terminal 111 are all inserted into the wheel body 1, the end of the first conductive sheet 5 is fixed on the first terminal 9, and the end of the third conductive sheet 7 is fixed on the second terminal 10. The first terminal 9 and the second terminal 10 are respectively connected to the power cord, and the second conductive sheet 6 and the fourth conductive sheet 8 are connected together and fixed together on the third terminal 111. In this way, the two heating elements 2 can be connected in series, and the third terminal 111 is not connected to the power cord. The third terminal 111 not only realizes the series connection of the two heating elements 2, but also when the wheel body 1 is installed on the air cushion machine, the wheel body 1 can be installed through the three points of the first terminal 9, the second terminal 10, and the third terminal 111, ensuring that the wheel body 1 can be firmly installed on the air cushion machine.

[0059] The air cushion machine includes a driving component and the above-mentioned heat-sealing transmission mechanism. The driving component and the heat-sealing transmission mechanism are both installed on the air cushion machine. The driving component can drive the wheel body 1 in the heat-sealing transmission mechanism to rotate. The wheel body 1 contacts the overlapping film layers of the buffer air cushion or bubble bag conveyed by the air cushion machine. The heat-sealing transmission mechanism can heat-seal the overlapping film layers of the buffer air cushion or bubble bag, and the rotating wheel body 1 can also convey the buffer air cushion or bubble bag downstream.

[0060] FIG10 schematically shows the heat-sealing effect of the heat-sealing transmission mechanism shown in FIG3 after heat-sealing the buffer air cushion or bubble bag.

[0061] According to the technical solution of the present invention, the first terminal 9 and the second terminal 10 are respectively connected to the power cord of the air cushion machine. Referring to Figure 10, the wheel body 1 is in contact with the laminated film layer on the left side of the cushion air cushion or bubble bag 101 conveyed by the air cushion machine. The laminated film layer on the left side of the cushion air cushion or bubble bag 101 needs to be heat-sealed. When the two heating elements 2 are heated to a temperature sufficient to seal the film layer on the left side of the cushion air cushion or bubble bag 101 together, the driving component on the air cushion machine drives the wheel body 1 to rotate. As the wheel body 1 rotates, the heat generated by the two heating elements 2 is transferred to the laminated film layers to seal the laminated film layers together. At the same time, the rotating wheel body 1 transmits the buffer air cushion or bubble bag 101 downstream. Since the gap 201 between the two bend positions 21 of one heating element 2 on the outer periphery of the wheel body 1 and the gap 201 between the two bend positions 21 of the other heating element 2 on the outer periphery of the wheel body 1 are respectively located on the opposite sides of the wheel body 1, in this way, referring to Figure 10, the two heating elements 2 form two parallel heat sealing lines 103 and 104 on the film layer, the two bend positions 21 of one heating element 2 will form a pair of heat sealing line heads 105 on the film layer, and the two bend positions 21 of the other heating element 2 will form a pair of heat sealing line heads 105 on the film layer. The pair of heat sealing thread heads 106 are formed, and the pair of heat sealing thread heads 105 on the heat sealing line 103 and the pair of heat sealing thread heads 106 on the heat sealing line 104 are staggered in the transverse direction. The gas sealed in the air chamber 102 will generate an extrusion force on the two heat sealing thread heads 105 near the air chamber 102. Since the two heat sealing thread heads 105 are on the same heat sealing line 103, the two heat sealing thread heads 105 will evenly share the extrusion force of the sealed gas in the air chamber 102 without generating distortion, so that the extrusion force of the sealed gas in the air chamber 102 on the two heat sealing thread heads 105 can achieve a balanced effect. , the extrusion force on each heat-sealing thread head 105 is reduced, thus minimizing the possibility of heat-sealing failure and damage at the heat-sealing thread head 105. Moreover, since the gaps 201 between the two heating elements 2 on the outer periphery of the wheel body 1 are staggered along the circumferential direction on the axial projection surface of the wheel body 1, even if the sealing gas in the air chamber 102 leaks through the tiny gap 107 between the pair of heat-sealing thread heads 105 close to the air chamber, the leaked gas will be blocked by the adjacent heat-sealing line 104 and will not directly leak through the tiny gap 107 between the pair of heat-sealing thread heads 106 on the adjacent heat-sealing line 104.Moreover, since the gap 201 between the two bends 21 of one heating element 2 on the outer circumference of the wheel body 1 and the gap 201 between the two bends 21 of the other heating element 2 on the outer circumference of the wheel body 1 are respectively located on opposite sides of the wheel body 1, this can ensure that the distance between the pair of heat-sealing thread heads 105 on the heat-sealing line 103 and the pair of heat-sealing thread heads 106 on the heat-sealing line 104 is maximized, and the gas leaking from the tiny gap 107 between the pair of heat-sealing thread heads 105 close to the air chamber is minimized from leaking again from the tiny gap 107 between the pair of heat-sealing thread heads 106 on the heat-sealing line 104 away from the air chamber, thereby ensuring the sealing effect of the air chamber 102 to the greatest extent; in addition, since the plane where the two heating elements 2 are located is perpendicular to the axial direction of the wheel body 1, the two heating elements 2 will Two parallel heat seal lines 103 and 104 are formed on the film layer. This ensures that the two heat seal lines formed by the two heating elements 2 on the film layer are always straight and parallel. Furthermore, the two heat seal lines 105 at the pair of heat seal lines 105 on the heat seal line 103 can evenly distribute the extrusion force of the sealed gas in the air chamber 102 without distortion, thereby ensuring a good sealing effect. Depending on the style and size of the cushioning air cushion or bubble bag 101, the heat seal lines of some air chambers may have heat seal lines near the air chamber, while the heat seal lines far from the air chamber have no heat seal lines, thus forming a continuous heat seal line. In this case, even if the sealed gas in the air chamber leaks through the slight gap between the pair of heat seal lines near the air chamber, the heat seal lines far from the air chamber will completely block the gas leakage.

[0062] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A heat sealing transmission mechanism, It is characterized in that include: A rotatable wheel body; and A plurality of heating elements are wound around the outer periphery of the wheel body, a gap is formed between two curved corners of the heating elements on the outer periphery of the wheel body, and the gaps of at least two heating elements on the outer periphery of the wheel body are staggered along the circumferential direction on the projection plane of the axial direction of the wheel body, The superimposed film layers are sealed together by contacting the wheel body with the superimposed film layers and heating the heating element to a temperature sufficient to seal the film layers together.

2. The heat sealing transmission mechanism according to claim 1, It is characterized in that The number of the heating elements is two, the two heating elements are distributed in parallel, and the gaps between the two heating elements on the outer periphery of the wheel body are respectively located on opposite sides of the wheel body.

3. The heat sealing transmission mechanism according to claim 2, It is characterized in that A first notch and a second notch are provided on the outer circumference of the wheel body, the two ends of one heating element are inserted in the first notch, and the two ends of another heating element are inserted in the second notch, the first notch is close to one end of the wheel body, and the second notch is close to the other end of the wheel body.

4. The heat sealing transmission mechanism according to claim 2, It is characterized in that The two ends of the heating element are inserted into the outer circumference of the wheel body.

5. The heat sealing transmission mechanism according to claim 1, It is characterized in that The plane where the heating element is located is perpendicular to the axial direction of the wheel body.

6. The heat sealing transmission mechanism according to claim 1, It is characterized in that The outer circumference of the wheel body is provided with accommodating grooves for accommodating heating elements. The number of the accommodating grooves is the same as the number of the heating elements. The heating elements are accommodated in the accommodating grooves and the surfaces of the heating elements are not lower than the outer circumference of the wheel body.

7. The heat sealing transmission mechanism according to any one of claims 2 to 4, It is characterized in that It also includes two first springs and two second springs arranged on the wheel body, One end of the two first springs is fixed on the wheel body, and the other end of the two first springs is connected to one end of the two heating elements respectively. One ends of the two second springs are fixed on the wheel body, and the other ends of the two second springs are respectively connected to the other ends of the two heating elements.

8. The heat sealing transmission mechanism according to any one of claims 2 to 4, It is characterized in that It also includes a first conductive sheet, a second conductive sheet, a third conductive sheet and a fourth conductive sheet arranged on the wheel body, One end of the first conductive sheet is disposed on one end of the first heating element, and one end of the second conductive sheet is disposed on the other end of the heating element. One end of the third conductive sheet is arranged on one end of the second heating element, and one end of the fourth conductive sheet is arranged on the other end of the heating element.

9. The heat sealing transmission mechanism according to claim 8, It is characterized in that It also includes a first terminal and a second terminal arranged on the wheel body, the other end of the second conductive sheet is connected to the other end of the fourth conductive sheet so that the two heating elements are connected in series, the other end of the first conductive sheet is arranged on the first terminal, and the other end of the third conductive sheet is arranged on the second terminal.

10. Air cushion machine, It is characterized in that The invention comprises a driving component and the heat-sealing transmission mechanism according to any one of claims 1 to 9, wherein the driving component drives the wheel body to rotate.

Images