Capping mechanism for a filling machine and filling machine

Abstract

The utility model relates to liquid filling equipment technical field provides a top package mechanism and filling machine of filling machine, and the top package mechanism of filling machine includes frame body, driving part and top pressure head, and frame body is equipped with containing space and the through -hole of intercommunication containing space, and frame body is used for connecting the elevator of filling machine, and containing space is used for accommodating the box of filling in waiting, driving part sets up in frame body, and sets up correspondingly through -hole, and driving part is adapted to wear and set up through -hole at least partially, and top pressure head sets up in the output of driving part, and driving part is adapted to drive top pressure head telescopic in containing space, to extrude the box of filling in waiting, the utility model discloses the top package mechanism of filling machine, through the synergies of frame body, driving part and top pressure head, adopts top pressure structure accurate control top pressure stroke, and improves the exhaust effect of the box of filling in waiting, and enhances top pressure stability.

Description

Technical Field

[0001] This utility model relates to the field of liquid filling equipment technology, and in particular to the top packaging mechanism of a filling machine and the filling machine itself. Background Technology

[0002] Before a standard-temperature milk filling machine injects a measured amount of milk into the milk carton, a top-packing mechanism is typically used to expel excess air from the carton before it is sewn shut. The less air inside the milk carton, the lower the risk of bulging. In related technologies, incomplete air removal during the milk filling process can easily lead to bulging during subsequent transportation and storage, affecting the product's appearance and shelf life. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the related art. To this end, this invention proposes a top-packing mechanism for a filling machine, designed to improve the venting effect of the boxes to be filled.

[0004] This utility model also proposes a filling machine.

[0005] The top-packing mechanism of the filling machine according to the first aspect of the present invention includes: A frame having a receiving space and a through hole communicating with the receiving space; the frame is used to connect to the lifting device of the filling machine; the receiving space is used to receive the box to be filled. A driving member is disposed on the frame, and the driving member is disposed corresponding to the through hole, and the driving member is at least partially adapted to pass through the through hole; A pressure head is located at the output end of the drive member, and the drive member is adapted to drive the pressure head to extend and retract within the receiving space to squeeze the box to be filled.

[0006] The top-packing mechanism of the filling machine according to the present invention, through the coordinated action of the frame, the driving component and the top pressure head, adopts a top pressure structure to precisely control the top pressure stroke, improve the venting effect of the box to be filled, and enhance the stability of the top pressure.

[0007] According to one embodiment of the present invention, the frame is provided with through holes on both sides, and the top packaging mechanism of the filling machine includes two driving members and two top pressing heads. Each driving member is provided with one through hole, and each top pressing head is provided with one driving member. The two driving members are adapted to drive the two top pressing heads to move closer or further apart.

[0008] According to one embodiment of the present invention, the pressure head includes: A column shaft, one end of which is connected to the output end of the drive component; A column head is located at the other end of the column shaft, and the cross-sectional area of ​​the column head is larger than the cross-sectional area of ​​the column shaft.

[0009] According to one embodiment of the present invention, the column head is a disc structure, and the axis of the column head is parallel to the driving direction of the driving member.

[0010] According to one embodiment of the present invention, the diameter of the column head is in the range of one-third to one-half of the width of the filling box.

[0011] According to one embodiment of the present invention, the outer periphery of the front end of the column head is chamfered.

[0012] According to one embodiment of the present invention, the top packaging mechanism of the filling machine further includes a mounting plate, the mounting plate being disposed on the frame and corresponding to the through hole, and the driving component being disposed on the mounting plate.

[0013] According to one embodiment of the present invention, the mounting plate is installed on the upper half of the outer wall of the frame.

[0014] According to one embodiment of the present invention, the through hole extends along the height direction of the frame.

[0015] According to a second aspect of the present invention, a filling machine includes a conveyor, a plurality of elevators, and a plurality of top-packing mechanisms for the filling machine. The plurality of elevators are disposed on the conveyor, and the conveyor is adapted to transport the plurality of elevators in a cyclical motion. The top-packing mechanism of each filling machine is disposed on one of the elevators.

[0016] The filling machine according to the present utility model includes the top packaging mechanism of the filling machine described above, and therefore has all the technical effects of the top packaging mechanism of the filling machine described above, which will not be repeated here.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of the filling machine provided in this embodiment of the utility model.

[0020] Figure 2 This is a schematic diagram of the top packaging mechanism of the filling machine provided in this embodiment of the utility model.

[0021] Figure 3 This is a structural schematic diagram of the top pressure head and driving component provided in an embodiment of the present utility model.

[0022] Figure label: 1. Conveyor; 2. Elevator; 3. Top packaging mechanism of filling machine; 31. Frame; 311. Accommodation space; 312. Through hole; 32. Drive component; 33. Top pressure head; 331. Column shaft; 332. Column head; 34. Mounting plate. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0026] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0028] In existing technologies, bulging of milk packaging often occurs during the filling process, mainly because residual air inside the carton cannot be effectively expelled before filling.

[0029] Therefore, please refer to the following: Figure 1 and Figure 2 This utility model proposes a top-packing mechanism including a frame 31, a driving member 32, and a top-pressing head 33. The frame 31 has a receiving space 311 and a through hole 312 for connecting the lifter 2 and accommodating the box to be filled. The driving member 32 is provided corresponding to the through hole 312 and partially passes through it. The top-pressing head 33 is installed at the output end of the driving member 32 and is controlled by the driving member 32 to extend and compress the box to be filled within the receiving space 311.

[0030] The frame 31 is a rigid support component whose accommodating space 311 forms a circumferential constraint on the box to be filled. The through-hole 312 is a guide channel penetrating the side wall of the frame 31, which can be rectangular or circular, used to guide the movement trajectory of the drive component 32. The drive component 32 is a linear power device, which can be a cylinder or an electric push rod, and its output shaft forms an axial fit with the through-hole 312. The pressure head 33 is an end-acting component, which can be a cylindrical metal block, whose working surface forms a surface contact with the surface of the box to be filled.

[0031] For example, when the lifter 2 carries the box to be filled into the workstation, the frame 31 is rigidly fixed to the lifter 2 via a mechanical connection. After the drive unit 32 is activated, the output shaft advances along the axis of the through hole 312, driving the top pressure head 33 to move into the receiving space 311. In one embodiment, the top pressure head 33 continuously applies pressure after contacting the side wall of the box to be filled, forcing the box to undergo elastic deformation. During this process, the air inside the box to be filled is compressed and discharged from the opening. When the drive unit 32 retracts, the top pressure head 33 exits the receiving space 311, completing a single venting operation. The cooperation between the through hole 312 and the drive unit 32 ensures the perpendicularity of the pressure direction, preventing the box to be filled from shifting due to lateral forces.

[0032] Understandably, this invention achieves directional and stable compression of the filling box, effectively expelling residual air. The rigid constraint formed by the frame 31 prevents the filling box from shifting during the pressurization process, and the axial cooperation between the drive component 32 and the through hole 312 ensures precise and controllable pressurization trajectory. The full contact between the top pressure head 33 and the filling box avoids local stress concentration, maintaining packaging integrity while achieving the desired air venting effect.

[0033] According to one embodiment of the present invention, through holes 312 are provided on both opposite sides of the frame 31. The top packaging mechanism 3 of the filling machine includes two driving members 32 and two top pressing heads 33. Each driving member 32 is provided with a through hole 312, and each top pressing head 33 is provided with a driving member 32. The two driving members 32 are adapted to drive the two top pressing heads 33 to approach or move away from each other.

[0034] The presence of through holes 312 on opposite sides of the frame 31 indicates that through holes 312 are symmetrically arranged on both sides of the frame 31, forming two symmetrical working positions, allowing the pressing head 33 to enter the receiving space 311 from both sides. The driving component 32 is positioned corresponding to the through hole 312, meaning that the driving component 32 is installed with its axis aligned with the through hole 312. For example, a cylinder or hydraulic cylinder can be used as a power source, installed outside the through hole 312, with its output end passing through the through hole 312 and connecting to the pressing head 33. The two driving components 32 are suitable for driving the two pressing heads 33 to move closer or further apart, meaning that the two driving components 32 independently control the movement trajectory of the pressing heads 33, achieving synchronous driving to move the pressing heads 33 towards each other to complete the pressing action or to move them in the opposite direction to reset.

[0035] For example, when the box to be filled enters the receiving space 311 of the frame 31, the two driving components 32 simultaneously drive the pressing heads 33 to move towards each other along the axis of the through hole 312. The front ends of the pressing heads 33 contact the side walls of the box and apply uniform extrusion force. During the synchronous advancement of the two pressing heads 33, the side walls of the box simultaneously indent inward, and the internal air is continuously compressed and discharged from the opening. After the extrusion is completed, the driving component 32 controls the pressing heads 33 to move in the opposite direction to detach from the box, avoiding interference with subsequent operations. Through the symmetrical force application method on both sides, the force balance of the box is ensured, and the air discharge path is more complete.

[0036] Understandably, this invention effectively improves the efficiency of air removal from the inside of the filling box, reducing bulging defects caused by residual air. The symmetrical extrusion formed by the synchronous action of the two top pressure heads 33 makes the box shape change more uniform, avoiding local stress concentration caused by unilateral force application. The independent control mechanism of the drive component 32 can adapt to the processing needs of different box specifications, enhancing the versatility of the equipment.

[0037] like Figure 3 As shown, according to one embodiment of the present invention, the top pressure head 33 includes a column shaft 331 and a column head 332. One end of the column shaft 331 is connected to the output end of the drive member 32, and the column head 332 is disposed at the other end of the column shaft 331. The cross-sectional area of ​​the column head 332 is larger than the cross-sectional area of ​​the column shaft 331.

[0038] The column shaft 331 is a rigid connecting component used to transmit the output power of the drive component 32. Its function is to stably transmit the driving force to the column head 332 and avoid pressure loss due to structural deformation. The column head 332 is the pressure-applying component that directly contacts the box to be filled. It can be implemented using a disc-shaped or rectangular block structure. Its increased cross-sectional area expands the contact area, thereby covering a larger box surface during the extrusion process and improving air expulsion efficiency.

[0039] For example, the shaft 331 is fixed to the output end of the drive unit 32. When the drive unit 32 is activated, the shaft 331 transmits linear driving force axially to the head 332. Since the head 332 has a larger cross-sectional area than the shaft 331, it forms a stepped pressure distribution when in contact with the box to be filled. The contact area expands from a local point on the shaft 331 to a planar coverage of the head 332. This structure ensures uniform force distribution on the box surface, preventing excessive local pressure that could damage the packaging, while also increasing the compression area to fully expel residual air from the box. The rigid connection between the shaft 331 and the head 332 further ensures the stability of the drive stroke, preventing pressure dispersion due to component misalignment during pressurization.

[0040] Understandably, this utility model solves the problem of insufficient air expulsion caused by insufficient contact area of ​​the top pressure head 33. By increasing the cross-sectional area of ​​the column head 332, uniform pressure is achieved, effectively reducing the amount of residual air in the box, thereby reducing the risk of packaging bulging.

[0041] According to one embodiment of the present invention, the column head 332 is a disc structure, and the axis of the column head 332 is parallel to the driving direction of the driving member 32.

[0042] The disc structure refers to a cylindrical shape with a circular end face profile, the diameter of which is larger than the cross-sectional dimension of the column shaft 331 to form a planar contact area. The parallelism between the axis and the driving direction means that the center line of the column head 332 remains spatially parallel to the linear motion trajectory of the driving component 32 during movement, ensuring that the direction of driving force transmission does not deviate.

[0043] For example, the planar end face of the disc structure forms a surface contact mode when it contacts the box to be filled, effectively expanding the contact area. When the driving member 32 pushes the column head 332 to move along a predetermined trajectory, the maintenance of the axis parallelism ensures that the direction of the driving force is always perpendicular to the surface of the box to be filled, avoiding the generation of lateral shear force. This structural arrangement improves the uniformity of pressure distribution during the pressing process, and can cover a larger exhaust area under the same driving force conditions.

[0044] Please refer to the reference. Figure 2 and Figure 3 According to one embodiment of the present invention, the diameter of the column head 332 is in the range of one-third to one-half of the width of the filling box.

[0045] For example, when the diameter of the column head 332 is one-third of the box width, the contact area between the top pressure head 33 and the box can cover the effective exhaust area, while avoiding excessive lateral pressure on the sidewalls of the box. When the diameter of the column head 332 reaches half the box width, the increased contact area can evenly distribute the top pressure, preventing local stress from exceeding the yield strength of the box material. This proportional range was determined through experimental verification, which can maintain the structural integrity of the box while ensuring the effective formation of air exhaust channels during the top pressure stroke.

[0046] Understandably, this invention creates an optimized contact pressure distribution during top-pressing operations, allowing air to be fully expelled from the box to be filled without causing plastic deformation, effectively reducing the probability of box bulging after filling, while also adapting to the processing needs of boxes of different sizes.

[0047] According to one embodiment of the present invention, the outer periphery of the front end of the column head 332 is chamfered.

[0048] The chamfer refers to the beveled or rounded transition structure formed at the front edge of the column head 332. This structure reduces contact stress concentration by eliminating the sharp edges of the column head 332. The front outer perimeter refers to the outer edge area of ​​the end of the column head 332 that contacts the box to be filled. Specifically, this can be achieved by limiting the chamfer to cover at least one-third of the width of the circumferential edge of the column head 332.

[0049] For example, when the drive unit 32 pushes the top pressure head 33 into the box to be filled, the chamfered structure allows the edge of the head 332 to make progressive contact with the packaging material. The chamfered bevel or arc guides the packaging material to deform smoothly during compression, preventing sharp edges from instantly cutting into the material surface. During extrusion, the chamfered structure gradually increases the contact area between the head 332 and the packaging material, and the pressure distribution spreads evenly from the edge to the center, thereby preventing local stress from exceeding the tensile strength of the packaging material. At the same time, the guiding effect of the chamfer makes it easier for the top pressure head 33 to penetrate deeper into the box, ensuring the complete execution of the extrusion stroke and reducing the amount of residual air.

[0050] Understandably, this utility model effectively prevents the packaging material from being damaged due to edge stress concentration during the squeezing process of the top pressure head 33, while ensuring that the contact surface between the top pressure head 33 and the box to be filled forms a continuous and stable pressure transmission, so that the air inside the box is fully discharged, reducing the probability of packaging bulging after filling.

[0051] According to one embodiment of the present invention, a mounting plate 34 is provided on the frame 31 and corresponding to the through hole 312, and a driving member 32 is provided on the mounting plate 34.

[0052] The mounting plate 34 refers to a metal plate with a planar support structure, which can be fixed to the outer wall of the frame 31 by welding or bolting, and is used to provide a rigid mounting base for the drive component 32. The frame 31 refers to a shell structure that forms the accommodating space 311, which can be formed by bending steel plate, and its outer wall is provided with through holes 312 to guide the movement path of the top pressure head 33.

[0053] For example, the mounting plate 34 is fixed to the outer wall of the frame 31 and axially aligned with the through hole 312, and the drive member 32 is vertically mounted on the surface of the mounting plate 34 by bolts. When the drive member 32 is activated, its output end drives the pressing head 33 to move linearly along the axial direction of the through hole 312. Due to the rigid connection between the mounting plate 34 and the frame 31, the drive member 32 will not have lateral displacement during operation, and the pressing head 33 always extends and retracts along the path defined by the through hole 312.

[0054] Understandably, this invention effectively eliminates the axial wobble of the drive component 32 during operation, ensuring that the top pressure head 33 maintains a vertical trajectory when compressing the can. The composite structure of the mounting plate 34 and the frame 31 allows the drive component 32 to maintain a stable installation state even under high-frequency operation, avoiding problems such as loose bolts or worn locating pins due to vibration. The output force of the drive component 32 is evenly distributed to the frame 31 through the mounting plate 34, preventing local deformation of the frame 31, thereby ensuring the continuous and effective compression of the can by the top pressure head 33.

[0055] According to one embodiment of the present invention, the mounting plate 34 is mounted on the upper half of the outer wall of the frame 31.

[0056] The upper half of the outer wall of the frame 31 refers to the area near the top of the frame 31 in the vertical direction. Specifically, it can be defined as the upper third to the upper half of the total height of the frame 31. Its function is to keep the output direction of the drive unit 32 perpendicular to the top of the box by installing the position close to the top area of ​​the box to be filled.

[0057] For example, when the mounting plate 34 is fixed to the upper half of the outer wall of the frame 31, the overall center of gravity of the drive member 32 and the top pressure head 33 is closer to the top of the frame 31, thereby reducing structural displacement caused by the movement of the lifter 2 or vibration during filling. When the output end of the drive member 32 drives the top pressure head 33 to extend and retract along the direction of the through hole 312, since the mounting plate 34 is located in the upper half, the movement trajectory of the top pressure head 33 is closer to the top inner wall of the box to be filled, ensuring that the squeezing action directly acts on the gas area accumulated at the top of the box. During the process of the lifter 2 driving the frame 31 to the filling station, the vertical alignment between the top pressure head 33 and the contact surface of the box is maintained, avoiding the squeezing angle deviation caused by the offset of the installation position.

[0058] According to one embodiment of the present invention, the through hole 312 extends along the height direction of the frame 31.

[0059] For example, during the compression of the box to be filled, the top pressure head 33 always applies pressure along the horizontal direction of the box body to ensure that the force is evenly distributed on both sides of the box body. When the height of the box body changes, the longitudinal extension of the through hole 312 allows the drive member 32 to adjust the installation height, for example by adjusting the fixed position of the mounting plate 34 on the frame 31, so that the stroke of the top pressure head 33 covers the full height range of the box body.

[0060] In some specific embodiments, the length of the through hole 312 can be 1.5 times the height of the box to be filled, to provide redundant travel space. The outer wall of the frame 31 may be provided with scale markings to facilitate quick adjustment of the installation position of the drive component 32 according to the box height.

[0061] Understandably, this invention achieves a perfect match between the movement trajectory of the top pressing head 33 and the height of the box, ensuring that air inside the box is completely expelled during the compression process, reducing packaging bulging caused by residual air. Simultaneously, the longitudinal extension structure of the through hole 312 allows for flexible adjustment of the installation position of the drive component 32 according to the box height, improving the equipment's compatibility with different packaging sizes.

[0062] like Figure 1 As shown, according to one embodiment of the present invention, a filling machine includes a conveyor 1, a plurality of elevators 2 and a plurality of top packaging mechanisms. The plurality of elevators 2 are disposed on the conveyor 1, and the conveyor 1 is adapted to transport the plurality of elevators 2 in a cyclical movement. Each top packaging mechanism is disposed on one elevator 2.

[0063] The conveyor 1 is a conveying device used to carry and move the elevator 2. It can be a belt conveyor 1 or a chain conveyor 1, and its function is to form a continuous, circulating material transport path, enabling the elevator 2 to move along a predetermined trajectory. The elevator 2 is a supporting component used to fix the boxes to be filled. It can be a robotic arm or a lifting platform, and its function is to position the boxes to be filled at the filling station and complete the station switching under the drive of the conveyor 1. The top-packing mechanism is a device used to squeeze the boxes to be filled. It can be a cylinder-driven top-pressing head 33, and its function is to expel residual air from the boxes through the pressing action.

[0064] For example, conveyor 1 drives multiple elevators 2 to move cyclically along a circular path, with each elevator 2 equipped with an independent top-packing mechanism. When an elevator 2 moves to the filling station, the drive component 32 of the top-packing mechanism pushes the pressing head 33 into the frame 31 on the elevator 2, squeezing out the air from the box to be filled through a pressing action. After venting is complete, the pressing head 33 retracts. Because each elevator 2 is equipped with a dedicated top-packing mechanism, all boxes to be filled can receive independent venting during movement, avoiding air residue caused by insufficient time during single-station processing.

[0065] Understandably, this invention effectively solves the problem of bulging caused by residual air inside the filling boxes. The one-to-one correspondence between each top-packing mechanism and the elevator 2 ensures that all filling boxes receive sufficient venting, while the cyclically moving conveyor 1 avoids process interruptions, enabling the filling process to maintain high efficiency while improving quality stability.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A top-packing mechanism for a filling machine, characterized in that, include: A frame having a receiving space and a through hole communicating with the receiving space; the frame is used to connect to the lifting device of the filling machine; the receiving space is used to receive the box to be filled. A driving member is disposed on the frame and corresponding to the through hole, and the driving member is at least partially adapted to pass through the through hole; A pressure head is located at the output end of the drive member, and the drive member is adapted to drive the pressure head to extend and retract within the receiving space to squeeze the box to be filled.

2. The top-packing mechanism of the filling machine according to claim 1, characterized in that, The frame is provided with through holes on both sides. The top packaging mechanism of the filling machine includes two driving members and two top pressing heads. Each driving member corresponds to one through hole, and each top pressing head corresponds to one driving member. The two driving members are adapted to drive the two top pressing heads to move closer or further apart.

3. The top-packing mechanism of the filling machine according to claim 1, characterized in that, The pressure head includes: A column shaft, one end of which is connected to the output end of the drive component; A column head is located at the other end of the column shaft, and the cross-sectional area of ​​the column head is larger than the cross-sectional area of ​​the column shaft.

4. The top-packing mechanism of the filling machine according to claim 3, characterized in that, The column head is a disc structure, and the axis of the column head is parallel to the driving direction of the driving component.

5. The top-packing mechanism of the filling machine according to claim 4, characterized in that, The diameter of the column head is between one-third and one-half the width of the box to be filled.

6. The top-packing mechanism of the filling machine according to claim 3, characterized in that, The outer periphery of the front end of the column head is chamfered.

7. The top-packing mechanism of the filling machine according to any one of claims 1 to 6, characterized in that, The top packaging mechanism of the filling machine also includes a mounting plate, which is disposed on the frame and corresponding to the through hole, and the driving component is disposed on the mounting plate.

8. The top-packing mechanism of the filling machine according to claim 7, characterized in that, The mounting plate is installed on the upper half of the outer wall of the frame.

9. The top-packing mechanism of the filling machine according to any one of claims 1 to 6, characterized in that, The through hole extends along the height direction of the frame.

10. A filling machine, characterized in that, The filling machine includes a conveyor, a plurality of elevators, and a plurality of top-packing mechanisms for the filling machine as described in any one of claims 1 to 9. The plurality of elevators are disposed on the conveyor, which is adapted to transport the plurality of elevators in a cyclical motion. The top-packing mechanism of each filling machine is disposed on one of the elevators.

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