Bottom cutter mounting mechanism, packaging film cutting device and roll paper packaging machine

Abstract

The utility model relates to a dead knife mounting mechanism, a packaging film cutting device and a roll paper packaging machine. During knife mounting, a dead knife can be mounted on a knife mounting seat; after installation, the drive shaft is driven by the driver to retract so as to drive the cutter installation seat to be pressed on the base, and fixing operation of the dead cutter is completed. When the position of the dead knife needs to be adjusted, the driver can drive the driving shaft to extend out, and pressing of the knife mounting seat on the base is relieved. Due to the fact that the driving shaft is connected with the cutter installing base in a sliding fit mode between the guide groove and the driving shaft, the cutter installing base can move in the length direction when not compressed, the cutter installing base can be adjusted to the needed position, it is guaranteed that the edge of the packaging film is aligned with the notch of the dead knife, the edge of the packaging film is prevented from being cut off, and packaging operation is conducted stably. The driving shaft can slide out of one end of the guide groove, so that when the dead knife needs to be replaced, other parts do not need to be detached from the cutter frame, time and labor are saved, and the knife replacement efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of packaging machines, and in particular to a bottom knife mounting mechanism, a packaging film cutting device and a roll paper packaging machine. Background Art

[0002] In the case of automated roll paper packaging, in order to ensure efficient production of the product, the film will be placed, cut, and fed in advance. Through the above steps, a single packaging film is prefabricated, and then the incoming material is directly packaged. Among them, the design and debugging of the film cutting part plays an extremely critical role in the formation of a single film, and it is necessary to meet the requirements of stable cutting effect and high-speed cutting capabilities. In the traditional film cutting device, the film cutting knife is divided into a bottom knife and a surface knife. The bottom knife is fixed under the packaging film and does not move, and the surface knife rotates above the packaging film and periodically cooperates with the bottom knife to cut the packaging film in the middle.

[0003] However, due to the structural design defects of the traditional bottom knife, if the edge of the packaging film is not aligned with the notch of the bottom knife, it is easy to be cut, causing the packaging film to break during the film feeding process. At the same time, when the bottom knife needs to be replaced, all the knife pressing screws in the cutter frame need to be removed, which is time-consuming and labor-intensive, resulting in reduced knife changing efficiency. Utility Model Content

[0004] Based on this, it is necessary to provide a bottom knife mounting mechanism, a packaging film cutting device and a roll paper packaging machine, which are convenient for adjusting the position of the bottom knife, reducing the risk of the edge of the packaging film being cut off, and improving the stability of the packaging operation; at the same time, the knife changing operation saves time and labor, which is conducive to improving the knife changing efficiency.

[0005] A bed knife mounting mechanism, the bed knife mounting mechanism comprising: a knife mounting seat for mounting a bed knife, and a guide groove is provided on the surface of the knife mounting seat, the guide groove passes through at least one end of the knife mounting seat along its own length direction; a driving assembly, comprising a base, a driving shaft and a driver for driving the driving shaft to telescope, the driving shaft can be at least partially slidably inserted into the guide groove, and slide out from the guide groove along one end of the knife mounting seat, and when the driver drives the driving shaft to telescope, it can drive the knife mounting seat to be pressed or released against the base.

[0006] The above-mentioned bottom knife installation mechanism can install the bottom knife on the knife mounting seat when installing the knife; after installation, the driver drives the drive shaft to retract, so as to drive the knife mounting seat to be pressed on the base, thereby completing the fixing operation of the bottom knife. When the position of the bottom knife needs to be adjusted, the driver can drive the drive shaft to extend to release the pressing of the knife mounting seat on the base. Since the connection between the drive shaft and the knife mounting seat is a sliding fit between the guide groove and the drive shaft, the knife mounting seat can be moved along the length direction when it is not pressed, so that it can be adjusted to the required position, ensuring that the edge of the packaging film is aligned with the notch of the bottom knife, avoiding the edge of the packaging film from being cut, and making the packaging operation stable. Since the drive shaft can slide out from one end of the guide groove, when the bottom knife needs to be replaced, the knife mounting seat can be directly slid out of the drive shaft together with the base, without the need to disassemble other parts on the cutting frame, which saves time and effort and is conducive to improving the efficiency of knife changing.

[0007] In some embodiments, the guide groove includes a first groove section and a second groove section, both extending along the length direction, the second groove section is closer to the surface of the tool mounting seat relative to the first groove section, and the cross-sectional area of ​​the first groove section is larger than the cross-sectional area of ​​the second groove section, so as to form an abutment surface between the first groove section and the second groove section, and a portion of the drive shaft is inserted into the first groove section and abuts against the abutment surface.

[0008] In some embodiments, the driving shaft includes a rod body portion and an abutment portion connected to the rod body portion, the abutment portion is located in the first groove section and is used to abut against the abutment surface, the rod body portion is located in the second groove section, and one end thereof extends out of the second groove section and is drivingly connected to the driver.

[0009] In some embodiments, a through hole is provided on the base, the tool mounting seat and the driver are respectively located on opposite sides of the base, the drive shaft is passed through the through hole, and one end thereof is connected to the driver driving, and the other end is inserted into the guide groove.

[0010] In some embodiments, a groove communicating with the through hole is provided on a side of the base facing away from the tool mounting seat, and the driver is fixed on a groove wall of the groove.

[0011] In some embodiments, a contact groove is provided on a side of the base facing the tool mounting seat, and when the driver drives the driving shaft to extend or retract, it can drive the tool mounting seat to press or release the groove wall of the contact groove.

[0012] In some embodiments, the groove wall of the abutting groove includes a first groove wall and a second groove wall opposite to each other, and the distance between the first groove wall and the second groove wall increases as it is closer to the surface of the base.

[0013] In some embodiments, there are multiple drivers and drive shafts, and all the drivers are spaced apart along the length direction of the tool mounting seat and are connected to the tool mounting seat through the corresponding drive shafts.

[0014] In some embodiments, the bottom knife mounting mechanism further includes a handle, and the handle is disposed on the knife mounting seat.

[0015] A packaging film cutting device comprises a bottom knife and the bottom knife mounting mechanism described in any one of the above items, wherein the bottom knife is mounted on the knife mounting seat.

[0016] The packaging film cutting device adopts the above bottom knife installation mechanism. When installing the knife, the bottom knife can be installed on the knife mounting seat; after installation, the driver drives the drive shaft to retract, so as to drive the knife mounting seat to be pressed on the base, and complete the fixing operation of the bottom knife. When the position of the bottom knife needs to be adjusted, the driver can drive the drive shaft to extend to release the pressing of the knife mounting seat on the base. Since the connection between the drive shaft and the knife mounting seat is a sliding fit between the guide groove and the drive shaft, the knife mounting seat can move along the length direction when it is not pressed, so that it can be adjusted to the required position, ensuring that the edge of the packaging film is aligned with the notch of the bottom knife, avoiding the edge of the packaging film from being cut, and making the packaging operation stable. Since the drive shaft can slide out from one end of the guide groove, when the bottom knife needs to be replaced, the knife mounting seat can be directly slid out of the drive shaft together with the base, without the need to disassemble other parts on the cutting frame, saving time and effort, and being conducive to improving the efficiency of knife changing.

[0017] A roll paper packaging machine comprises the packaging film cutting device mentioned above.

[0018] The roll paper packaging machine adopts the above bottom knife installation mechanism. When installing the knife, the bottom knife can be installed on the knife mounting seat; after installation, the driver drives the drive shaft to retract, so as to drive the knife mounting seat to be pressed on the base, and complete the fixing operation of the bottom knife. When the position of the bottom knife needs to be adjusted, the driver can drive the drive shaft to extend to release the pressing of the knife mounting seat on the base. Since the connection between the drive shaft and the knife mounting seat is a sliding fit between the guide groove and the drive shaft, the knife mounting seat can move along the length direction when it is not pressed, so that it can be adjusted to the required position, ensuring that the edge of the packaging film is aligned with the notch of the bottom knife, avoiding the edge of the packaging film from being cut off, so that the packaging operation can be carried out stably. Since the drive shaft can slide out from one end of the guide groove, when the bottom knife needs to be replaced, the knife mounting seat can be directly slid out of the drive shaft together with the base, without the need to disassemble other parts on the cutting frame, which saves time and effort and is conducive to improving the efficiency of knife changing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the installation mechanism described in some embodiments of the present application.

[0020] Figure 2 This is a schematic diagram of the structure of the installation mechanism after the base is removed in some embodiments of the present application.

[0021] Figure 3 This is a schematic diagram of the structure of the tool holder described in some embodiments of the present application.

[0022] Figure 4 This is a schematic diagram of the structure of the drive assembly described in some embodiments of the present application.

[0023] Figure 5 This is a schematic diagram of the structure of the base described in some embodiments of the present application.

[0024] Figure 6 for Figure 2 Enlarged view of the structure at center circle A.

[0025] Figure 7 This is a schematic diagram of the structure of the packaging film cutting device described in some embodiments of the present application.

[0026] 100, mounting mechanism; 10, knife mounting seat; 11, guide groove; 111, slot structure; 112, first slot section; 113, second slot section; X, length direction; 114, abutment surface; 20, drive assembly; 21, driver; 22, drive shaft; 221, abutment portion; 222, rod body portion; 23, base; 231, abutment slot; 23a, first slot wall; 23b, second slot wall; 232, perforation; 233, groove; 24, handle; 200, bottom knife; 210, notch; 300, surface knife. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0033] In some embodiments, please refer to Figure 1 and Figure 2 The present application provides a bed knife installation mechanism 100, which includes: a knife mounting seat 10 and a driving assembly 20. The knife mounting seat 10 is used to mount the bed knife 200, and a guide groove 11 is provided on its surface, and the guide groove 11 passes through at least one end of the knife mounting seat 10 along its own length direction X. The driving assembly 20 includes a base 23, a driving shaft 22, and a driver 21 for driving the driving shaft 22 to telescope. The driving shaft 22 is at least partially slidable into the guide groove 11 and slides out from the guide groove 11 along one end of the knife mounting seat 10. When the driver 21 drives the driving shaft 22 to telescope, it can drive the knife mounting seat 10 to be pressed or released against the base 23.

[0034] The bed knife installation mechanism 100 can install the bed knife 200 on the knife mounting seat 10 when installing the knife; after installation, the driver 21 drives the drive shaft 22 to retract, so as to drive the knife mounting seat 10 to be pressed against the base 23, and the fixing operation of the bed knife 200 is completed. When the position of the bed knife 200 needs to be adjusted, the driver 21 drives the drive shaft 22 to extend, and the pressing of the knife mounting seat 10 on the base 23 is released. Since the connection between the drive shaft 22 and the knife mounting seat 10 is a sliding fit between the guide groove 11 and the drive shaft 22, the knife mounting seat 10 can move along the length direction X in the unpressed state, so as to adjust it to the desired position, ensure that the edge of the packaging film is aligned with the notch 210 of the bed knife 200, avoid the edge of the packaging film from being cut, and make the packaging operation stable. Since the drive shaft 22 can slide out from one end of the guide groove 11, when the bottom knife 200 needs to be replaced, the knife holder 10 together with the base 23 can be directly slid out from the drive shaft 22 without removing other parts on the cutting frame, which saves time and effort and is conducive to improving the efficiency of knife changing.

[0035] It should be noted that the guide groove 11 refers to a structure formed by the surface of the tool holder 10 being recessed inward, and a notch structure 111 is formed on the surface of the tool holder 10. After the drive shaft 22 is inserted into the guide groove 11, a portion of the drive shaft 22 passes through the notch structure 111 of the guide groove 11 and is connected to the driver 21. At the same time, the drive shaft 22 can slide in or out from one end of the guide groove 11 to complete the corresponding assembly and disassembly.

[0036] Since the drive shaft 22 needs to drive the tool holder 10 to be pressed or released on the base 23, the drive shaft 22 cannot be separated from the slot structure 111 of the guide groove 11. For example, the size of the portion of the drive shaft 22 located in the guide groove 11 is larger than the size of the slot structure 111 of the guide groove 11. Of course, the shape of the guide groove 11 can be designed in many ways, such as but not limited to a dovetail shape, a T-shape, etc.

[0037] The driver 21 may be, but is not limited to, a cylinder, a hydraulic cylinder, or an electric cylinder. At the same time, there are many types of drive connections between the drive shaft 22 and the driver 21, and it is sufficient to realize the telescopic movement of the drive shaft 22. For example, the drive shaft 22 and the driver 21 are connected via a coupling; or the drive shaft 22 is directly connected to the piston part of the driver 21.

[0038] It should also be noted that the guide groove 11 may penetrate one end of the tool mounting seat 10 along its own length direction X, or may penetrate both ends of the tool mounting seat 10 along its own length direction X. When both ends of the tool mounting seat 10 are penetrated by the guide groove 11, the drive shaft 22 may slide in or out from either end of the tool mounting seat 10, so as to facilitate the disassembly and assembly of the bed knife mounting mechanism 100.

[0039] For further information, please refer to Figure 1 and Figure 3 The guide groove 11 includes a first groove section 112 and a second groove section 113 both extending along the length direction X. The second groove section 113 is close to the surface of the tool holder 10 relative to the first groove section 112. The cross-sectional area of ​​the first groove section 112 is larger than the cross-sectional area of ​​the second groove section 113, so as to form an abutment surface 114 between the first groove section 112 and the second groove section 113. A portion of the drive shaft 22 is inserted into the first groove section 112 and abuts against the abutment surface 114. It can be seen that during assembly, a portion of the drive shaft 22 is located in the first groove section 112, a portion is located in the second groove section 113, and another portion extends out of the second groove section 113 and is connected to the driver 21. During pressing, the driver 21 drives the drive shaft 22 to retract, a portion of the drive shaft 22 abuts against the abutment surface 114, and drives the abutment surface 114 to move toward one side of the base 23, so that the tool holder 10 is pressed against the base 23. Such a design not only facilitates the assembly of the bottom knife installation mechanism 100 , but also facilitates the pressing of the knife mounting seat 10 .

[0040] It should be noted that the cross sections of the first slot section 112 and the second slot section 113 refer to the cross sections of the first slot section 112 and the second slot section 113 perpendicular to the depth direction of the guide slot 11. Figure 3 For example, the cross section of the first slot segment 112 is Figure 3 The cross section indicated by S1 in the figure is as follows: Figure 3 The section indicated by S2.

[0041] There is a size difference between the first slot section 112 and the second slot section 113, so that an abutting surface 114 is formed therebetween. The number of abutting surfaces 114 can be one or two. When there is one abutting surface 114, the first slot section 112 and the second slot section 113 share a slot wall of a plane. When there are two abutting surfaces 114, the two abutting surfaces 114 are located on opposite sides of the second slot section 113.

[0042] For further information, please refer to Figure 1 and Figure 4 The driving shaft 22 includes a rod body 222 and an abutting portion 221 connected to the rod body 222. The abutting portion 221 is located in the first slot section 112 and is used to abut against the abutting surface 114. The rod body 222 is located in the second slot section 113, and one end thereof extends out of the second slot section 113 and is drivingly connected to the driver 21. In this way, the driving shaft 22 is designed as a two-section structure, so that the driving shaft 22 is not only convenient for connecting with the driver 21, but also convenient for driving the tool holder 10 to move toward the base 23 to complete the pressing action.

[0043] It is known that, in order to enable the abutting portion 221 to abut against the abutting surface 114, the abutting portion 221 may protrude in the radial direction of the rod body 222. Of course, the circumferential direction of the abutting portion 221 may also protrude in the radial direction of the rod body 222. Specifically, in some examples, the rod body 222 and the abutting portion 221 are both cylindrical structures, and the diameter of the abutting portion 221 is greater than the diameter of the rod body 222.

[0044] In addition, there are many ways to connect the abutting portion 221 and the rod body portion 222, such as but not limited to threaded connection, clamping, riveting, welding, pin connection, integrated molding, etc. Among them, the integrated molding method can be extrusion, injection molding, die casting, machining, etc.

[0045] In some embodiments, please refer to Figure 1 and Figure 4 The base 23 is provided with a through hole 232, the tool holder 10 and the driver 21 are respectively located on opposite sides of the base 23, the driving shaft 22 is passed through the through hole 232, and one end of the driving shaft 22 is connected to the driver 21, and the other end is inserted into the guide groove 11. In this way, the through hole 232 is introduced on the base 23, so that the driver 21 and the tool holder 10 are distributed on opposite sides of the base 23, so that the driver 21 can better drive the tool holder 10 to move closer to or away from the base 23, making the clamping or releasing operation more convenient. At the same time, the structural distribution of the bottom knife mounting mechanism 100 is also made more compact.

[0046] In some embodiments, please refer to Figure 4The side of the base 23 facing away from the knife holder 10 is provided with a groove 233 connected to the through hole 232, and the driver 21 is fixed on the groove wall of the groove 233. It can be seen that the groove 233 is provided on the base 23, so that the driver 21 is installed on the base 23 more stably, and the shaking when the knife holder 10 is pressed is avoided to affect the film cutting effect. At the same time, the driver 21 is arranged in the groove 233 to reduce the driver 21 protruding out of the base 23 and increase the space occupied. Such a design makes the structure distribution more compact and improves the space utilization of the equipment.

[0047] It should be noted that the groove 233 can extend along the length direction X of the tool holder 10, so that multiple drivers 21 can be accommodated at the same time. When the base 23 has a through hole 232, each through hole 232 can be connected to the groove 233, so that the driver 21 located in the groove 233 can be better connected to the drive shaft 22.

[0048] In some embodiments, please refer to Figure 1 and Figure 4 The base 23 is provided with an abutment groove 231 on one side facing the knife holder 10. When the driver 21 drives the driving shaft 22 to extend or retract, the knife holder 10 can be driven to press or release the groove wall of the abutment groove 231. In this way, the abutment groove 231 makes the pressing between the knife holder 10 and the base 23 more stable, avoiding relative movement during film cutting and affecting the film cutting effect.

[0049] For further information, please refer to Figure 5 The groove wall of the abutting groove 231 includes a first groove wall 23a and a second groove wall 23b opposite to each other, and the distance between the first groove wall 23a and the second groove wall 23b increases as it is closer to the surface of the base 23. It can be seen that the first groove wall 23a and the second groove wall 23b are in an inverted eight-shaped shape. During the pressing process, the first groove wall 23a and the second groove wall 23b can respectively exert supporting forces in different directions on the tool holder 10, ensuring that the tool holder 10 is stably pressed on the base 23. At the same time, the distance between the first groove wall 23a and the second groove wall 23b increases as it is closer to the surface of the base 23, so that it can also play a guiding role during the pressing process, so that the tool holder 10 is gradually guided to the bottom of the abutting groove 231, further improving the stability of the pressing.

[0050] For ease of understanding, Figure 5 For example, the distance between the first groove wall 23a and the second groove wall 23b can be Figure 5 The distance indicated by D.

[0051] In some embodiments, please refer to Figure 1 and Figure 2, there are multiple drivers 21 and drive shafts 22, all of which are spaced apart along the length direction X of the tool holder 10 and connected to the tool holder 10 through the corresponding drive shafts 22. It can be seen that during the pressing process, each driver 21 drives the tool holder 10 to move toward the base 23 through its corresponding drive shaft 22, so that the tool holder 10 is pressed against the base 23. Since each driver 21 is spaced apart along the length direction X, when driving the tool holder 10 to move, its driving force is distributed along the length direction X, so that the force on the tool holder 10 is more balanced and the pressing effect is better.

[0052] In some embodiments, please refer to Figure 2 , the bottom knife installation mechanism 100 also includes a handle 24, which is arranged on the knife mounting seat 10. It can be seen that when replacing, after the clamping operation is released, the knife mounting seat 10 can be driven by the handle 24 to move along its own length direction X, so that the drive shaft 22 slides out from one end of the guide groove 11, so that the knife mounting seat 10 and the bottom knife 200 can be taken out from the bottom knife installation mechanism 100 as a whole to quickly complete the disassembly. Of course, when adjusting the position, the knife mounting seat 10 can also be driven by the handle 24 to move in the length direction X, change the position of the knife mounting seat 10, so that the notch 210 on the knife mounting seat 10 is aligned with the edge of the packaging film, reducing the risk of the packaging film being cut.

[0053] It should be noted that there are various connection positions of the handle 24 on the tool mount 10, for example, the handle 24 can be set in the middle of the tool mount 10, or can be set at one end of the tool mount 10. At the same time, the connection method of the handle 24 on the tool mount 10 can be but not limited to bolt connection, clamping, pin connection, threaded connection, integrated molding, etc.

[0054] In some embodiments, please refer to Figure 7 The present application provides a packaging film cutting device, which includes a bottom knife 200 and any one of the above bottom knife mounting mechanisms 100 , and the bottom knife 200 is mounted on a knife mounting seat 10 .

[0055] The packaging film cutting device adopts the above bottom knife installation mechanism 100. When installing the knife, the bottom knife 200 can be installed on the knife mounting seat 10; after installation, the driver 21 drives the drive shaft 22 to retract, so as to drive the knife mounting seat 10 to press against the base 23, and complete the fixing operation of the bottom knife 200. When the position of the bottom knife 200 needs to be adjusted, the driver 21 drives the drive shaft 22 to extend, and releases the pressing of the knife mounting seat 10 on the base 23. Since the connection between the drive shaft 22 and the knife mounting seat 10 is a sliding fit between the guide groove 11 and the drive shaft 22, the knife mounting seat 10 can move along the length direction X in the unpressed state, so as to adjust it to the desired position, ensure that the edge of the packaging film is aligned with the notch 210 of the bottom knife 200, avoid the edge of the packaging film from being cut, and make the packaging operation stable. Since the drive shaft 22 can slide out from one end of the guide groove 11, when the bottom knife 200 needs to be replaced, the knife holder 10 together with the base 23 can be directly slid out from the drive shaft 22 without removing other parts on the cutting frame, which saves time and effort and is conducive to improving the efficiency of knife changing.

[0056] There are many ways to fix the bottom knife 200 on the knife holder 10, such as bolt connection, clamping, and clamping. Figure 6 The bottom knife 200 is provided with a plurality of notches 210, through which the edges of the packaging film can pass to prevent the edges from being cut. In addition, the packaging film cutting device further comprises a surface knife 300, which is located above the bottom knife 200 and is configured to rotate around its own axis and cooperate with the bottom knife 200 to cut the middle portion of the packaging film.

[0057] In some embodiments, the present application provides a roll paper packaging machine, which includes the above packaging film cutting device.

[0058] The roll paper packaging machine adopts the above bottom knife installation mechanism 100. When installing the knife, the bottom knife 200 can be installed on the knife mounting seat 10; after installation, the driver 21 drives the drive shaft 22 to retract, so as to drive the knife mounting seat 10 to press against the base 23, and complete the fixing operation of the bottom knife 200. When the position of the bottom knife 200 needs to be adjusted, the driver 21 drives the drive shaft 22 to extend, and releases the pressing of the knife mounting seat 10 on the base 23. Since the connection between the drive shaft 22 and the knife mounting seat 10 is a sliding fit between the guide groove 11 and the drive shaft 22, the knife mounting seat 10 can move along the length direction X in the unpressed state, so as to adjust it to the desired position, ensure that the edge of the packaging film is aligned with the notch 210 of the bottom knife 200, avoid the edge of the packaging film from being cut, and make the packaging operation stable. Since the drive shaft 22 can slide out from one end of the guide groove 11, when the bottom knife 200 needs to be replaced, the knife holder 10 together with the base 23 can be directly slid out from the drive shaft 22 without removing other parts on the cutting frame, which saves time and effort and is conducive to improving the efficiency of knife changing.

[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A bed knife mounting mechanism, characterized in that: The bed knife mounting mechanism comprises: A tool mounting seat (10) is used to mount a bottom knife (200), and a guide groove (11) is provided on its surface, wherein the guide groove (11) penetrates at least one end of the tool mounting seat (10) along its own length direction (X); The driving assembly (20) comprises a base (23), a driving shaft (22) and a driver (21) for driving the driving shaft (22) to telescope. The driving shaft (22) is at least partially slidably inserted into the guide groove (11) and slides out from the guide groove (11) along one end of the tool holder (10). When the driver (21) drives the driving shaft (22) to telescope, it can drive the tool holder (10) to be pressed against or released from the base (23).

2. The bed knife mounting mechanism according to claim 1, characterized in that: The guide groove (11) comprises a first groove section (112) and a second groove section (113) both extending along the length direction (X); the second groove section (113) is closer to the surface of the tool holder (10) relative to the first groove section (112); the cross-sectional area of ​​the first groove section (112) is larger than the cross-sectional area of ​​the second groove section (113), so as to form an abutment surface (114) between the first groove section (112) and the second groove section (113); a portion of the drive shaft (22) is inserted into the first groove section (112) and abuts against the abutment surface (114).

3. The bed knife mounting mechanism according to claim 2, characterized in that: The driving shaft (22) comprises a rod body (222) and an abutment portion (221) connected to the rod body (222); the abutment portion (221) is located in the first slot section (112) and is used to abut against the abutment surface (114); the rod body (222) is located in the second slot section (113), and one end of the rod body (222) extends out of the second slot section (113) and is drivingly connected to the driver (21).

4. The bed knife mounting mechanism according to claim 2, characterized in that: The base (23) is provided with a through hole (232), the tool mounting seat (10) and the driver (21) are respectively located on opposite sides of the base (23), the driving shaft (22) is passed through the through hole (232), one end of the driving shaft is connected to the driver (21), and the other end is inserted into the guide groove (11).

5. The bed knife mounting mechanism according to claim 4, characterized in that: A groove (233) communicating with the through hole (232) is provided on a side of the base (23) facing away from the tool mounting seat (10), and the driver (21) is fixed on a groove wall of the groove (233).

6. The bed knife mounting mechanism according to any one of claims 1 to 5, characterized in that: The base (23) is provided with an abutment groove (231) on one side facing the tool mounting seat (10); when the driver (21) drives the drive shaft (22) to extend or retract, it can drive the tool mounting seat (10) to press or release the groove wall of the abutment groove (231).

7. The bed knife mounting mechanism according to claim 6, characterized in that: The groove wall of the abutting groove (231) comprises a first groove wall (23a) and a second groove wall (23b) that are opposite to each other, and the distance between the first groove wall (23a) and the second groove wall (23b) increases as the distance is closer to the surface of the base (23).

8. The bed knife mounting mechanism according to any one of claims 1 to 5, characterized in that: There are multiple drivers (21) and multiple driving shafts (22), all of the drivers (21) are spaced apart along the length direction (X) of the tool mounting seat (10), and are connected to the tool mounting seat (10) via corresponding driving shafts (22); and / or, The bottom knife installation mechanism also includes a handle (24), and the handle (24) is arranged on the knife mounting seat (10).

9. A packaging film cutting device, characterized in that: The packaging film cutting device comprises a bottom knife (200) and a bottom knife mounting mechanism according to any one of claims 1 to 8, and the bottom knife (200) is mounted on the knife mounting seat (10).

10. A roll paper packaging machine, characterized in that: The roll paper packaging machine includes the packaging film cutting device according to claim 9.

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