Bottom opening device of bag making equipment

Abstract

The utility model discloses a bottom opening device of bag making equipment, a pair of bottom opening mechanisms are arranged on a bottom opening rotating shaft of the bottom opening device at intervals, and an adjusting mechanism is arranged on one side of each bottom opening mechanism. The bottom opening mechanism comprises a bag clamping wheel and a bag clamping rotating shaft which are arranged on a bottom opening rotating shaft. The bag clamping rotating shaft and the bottom opening rotating shaft extend in parallel and are rotatably arranged on the peripheral side of the second rotating disc, and the bag clamping rotating shaft can move in the axial direction relative to the second rotating disc and is further provided with a clamping head. The bottom opening mechanism further comprises a first protruding part, the first protruding part extends in the circumferential direction of the bottom opening rotating shaft and can push and abut against the bag clamping rotating shaft, and the adjusting mechanism comprises a second protruding part which extends in the circumferential direction of the bottom opening rotating shaft and can be adjusted in the circumferential direction relative to the first protruding part. According to the device, by adjusting the position of the second protruding part, the duration of clamping the bag bottom on one side of the packaging bag by the clamping head and the bag clamping part is adjusted. And the adjusting mode is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of bag making, in particular to a bottom opening device of bag making equipment. Background Art

[0002] In the prior art, during the bag-making process, the bag-making equipment needs to first paste the raw materials into a cylindrical shape, and then cut them one by one into individual cylindrical packaging bags through a cutting device. The packaging bags are then pressed and conveyed to a bottom opening device for bottom opening. The bottom-opened packaging bags are conveyed to a gluing device for gluing, and then the glue-coated packaging bags are conveyed to a bottom sealing device for bottom sealing, thereby producing a complete packaging bag.

[0003] Most existing bottom opening devices use a large hub component and a bottom opening mechanism to open the bottom. For example, in some bottom opening devices, the large hub component clamps the bottom of one side of the packaging bag, and the bottom opening mechanism is provided with a clamping head to clamp the bottom of the other side of the packaging bag to open the bottom. The clamping head needs to be pushed by a cam or a protruding structure to clamp the bottom of the other side of the packaging bag. This bottom opening device with a bottom opening mechanism and a large hub component can often only produce packaging bags of the same size.

[0004] With the development of technology, the materials and bag shapes of packaging bags have also experienced rapid development and iteration. For example, paper packaging bags are becoming more and more widely used because they are more environmentally friendly. New bag shapes often appear or different bag shapes need to be produced according to demand. When the bag shape changes, the size of the packaging bag generally changes. At this time, the time that the chuck of the bottom opening mechanism clamps the bottom of the bag on one side during the bottom opening process may change. For example, when the packaging bag becomes larger, the time that the chuck clamps the bottom of the bag on one side during the bottom opening process needs to be longer to ensure smooth bottom opening. In the existing technology, it is generally necessary to readjust or redesign the structure of the bottom opening mechanism. For example, a common operation is to remove and replace a new chuck, or replace the corresponding components that are compatible with the chuck. When adjusting or replacing part of the structure of the bottom opening mechanism, the equipment sometimes needs to be shut down for a long time for adjustment, which has the problems of complex adjustment structure and low adjustment efficiency.

[0005] Therefore, in the prior art, the bottom opening device of the bag making equipment has the problems of complex adjustment structure and low adjustment efficiency when adjusting the equipment in order to adapt to packaging bags of different sizes. Utility Model Content

[0006] The purpose of the utility model is to solve the problems in the prior art that a bottom opening device of a bag making device has a complex adjustment structure and low adjustment efficiency when adjusting the device to adapt to packaging bags of different sizes.

[0007] To address the aforementioned technical issues, embodiments of the present invention disclose a bottom-opening device for bag-making equipment, comprising a frame and a bottom-opening shaft rotatably mounted on the frame. A pair of bottom-opening mechanisms are spaced apart on the bottom-opening shaft. The pair of bottom-opening mechanisms are disposed on opposite sides of the packaging bag in the bag's width direction, and each bottom-opening mechanism is provided with an adjustment mechanism on one side. Each bottom-opening mechanism comprises a bag-clamping wheel and a bag-clamping shaft mounted on the bottom-opening shaft.

[0008] The bag clamping wheel is sleeved on the open-bottom rotating shaft and can rotate synchronously with the open-bottom rotating shaft. The bag clamping wheel includes a first turntable and a second turntable separated from each other along the axial direction of the open-bottom rotating shaft, wherein the second turntable is located on the outside of the first turntable in the axial direction, and a bag clamping portion extending along its circumferential direction is provided on the outer peripheral surface of the first turntable.

[0009] The bag clamping shaft extends parallel to the open bottom shaft and is rotatably arranged on the circumferential side of the second turntable, at a position corresponding to the bag clamping part in the axial direction. The bag clamping shaft can move axially relative to the second turntable, and a clamping head facing the bag clamping part is arranged near one end of the bag clamping wheel.

[0010] The bottom opening mechanism further includes a first protrusion axially located outside the bag clamping shaft. The first protrusion extends circumferentially along the bottom opening shaft and projects toward an end of the bag clamping shaft distal from the bag clamping wheel. Furthermore, the bottom opening shaft rotates synchronously with the bag clamping wheel, and the clutch is linked to switch axially between a clamped state and a released state relative to the first rotating disk.

[0011] When the chuck is in a clamping state, the first protrusion abuts against the end of the bag clamping shaft away from the bag clamping wheel, and the first protrusion pushes the bag clamping shaft and the chuck to move axially toward the first rotary disk, so that the chuck and the bag clamping portion jointly clamp the corresponding side of the bag body. Furthermore, when the chuck is in a disengaging state, the first protrusion separates from the end of the bag clamping shaft away from the bag clamping wheel, and the chuck and the bag clamping portion separate from each other in the axial direction.

[0012] Furthermore, the adjustment mechanism includes a second protrusion extending along the circumference of the open-bottom rotating shaft and being circumferentially adjustable relative to the first protrusion. In the axial direction, the second protrusion and the first protrusion both protrude toward the end of the bag clamping rotating shaft away from the bag clamping wheel, and the ends are aligned in the axial direction.

[0013] Adopting the above-mentioned technical solution, in this application, a pair of bottom opening mechanisms are respectively arranged on both sides of the packaging bag in the width direction of the bag body. The pair of bottom opening mechanisms can clamp the two sides of the bag bottom of the packaging bag in the width direction, so that the bottom opening mechanism and the large hub component cooperate to open the bag bottom of the packaging bag to realize the bottom opening action.

[0014] Specifically, each bottom opening mechanism includes a bag clamping wheel and a bag clamping shaft movable along the axial direction. A chuck adapted to the bag clamping wheel is provided on the bag clamping shaft. When the bag clamping wheel rotates to a position adapted to the bottom of the packaging bag, the chuck is in a clamping state. At this time, the first protrusion abuts against the end of the bag clamping shaft away from the bag clamping wheel. The first protrusion pushes the bag clamping shaft and the chuck to move axially toward the first turntable. The chuck and the bag clamping part jointly clamp the corresponding side of the bag body. The chuck on the bag clamping shaft and the bag clamping wheel cooperate to achieve clamping of one side of the bottom surface of the packaging bag, which has the advantage of simple structure.

[0015] Furthermore, the present invention is also provided with a second protrusion that can be adjusted circumferentially relative to the first protrusion. The second protrusion also extends circumferentially along the bottom-opening shaft, and both the second protrusion and the first protrusion protrude toward the end of the bag-clamping shaft away from the bag-clamping wheel, and the ends are aligned in the axial direction. By adjusting the circumferential position of the second protrusion relative to the first protrusion, the present invention can adjust the overall length of the first protrusion and the second protrusion in the circumferential direction of the bottom-opening shaft, that is, adjust the contact stroke of the bag-clamping shaft and the first protrusion and the second protrusion. By adjusting the length of the clamping stroke, the length of time the first protrusion pushes against the bag-clamping shaft is adjusted, and then the length of time the chuck and the bag-clamping part clamp the bottom of one side of the packaging bag is adjusted, so that a larger bottom surface can be accurately opened. By only adjusting the second protrusion in this way, the adjustment structure and adjustment method are simple, and the downtime adjustment time during the production process can be reduced to improve the adjustment efficiency and production efficiency.

[0016] The present invention also discloses a bottom opening device for bag-making equipment, wherein a first protrusion and a second protrusion partially overlap in the radial direction of a bottom-opening rotating shaft. Furthermore, a protruding abutment surface and a guiding slope are provided on the side of the first and second protrusions that is close to the bag-clamping rotating shaft, with the guiding slope being located upstream of the protruding abutment surface in the rotational direction of the bottom-opening rotating shaft.

[0017] With the above technical solution, the guiding bevel can gradually abut against the end of the bag clamping shaft away from the bag clamping wheel. During the abutment process, the guiding bevel acts as a buffer, allowing a smooth transition between the end of the bag clamping shaft and the first protrusion or the second protrusion, reducing the rigid impact between the end of the bag clamping shaft and the protruding abutment surface, making the clamping head smoother when clamping the bag bottom. This reduces wear on the end of the bag clamping shaft and the first protrusion or the second protrusion, and extends the service life of the bottom opening device.

[0018] The embodiment of the present utility model further discloses a bottom opening device for bag making equipment, wherein one of the first protrusion and the second protrusion is provided with an adjustment groove, and the other is provided with an adjustment protrusion adapted to the adjustment groove, and the adjustment protrusion can move along the adjustment groove.

[0019] By adopting the above technical solution, an adjustment groove and an adjustment protrusion are set for adaptive adjustment. The adjustment groove can guide the adjustment protrusion, making the adjustment more accurate and the adjustment length easier to control, which is convenient for adjustment at any time in actual production.

[0020] Further preferably, in this embodiment, the first protrusion and the second protrusion are both configured as arc-shaped sheet structures.

[0021] By adopting the above technical solution, the first protrusion and the second protrusion are both configured as arc-shaped sheet structures, and the first protrusion and the second protrusion partially overlap in the radial direction of the open-bottom rotating shaft. When the position of the second protrusion relative to the first protrusion is adjusted, the length of the overlapping part of the first protrusion and the second protrusion can be adjusted, thereby adjusting the overall length of the first protrusion and the second protrusion, and finally adjusting the contact time between the end of the bag clamping rotating shaft and the first protrusion and the length of time that the clamping head and the bag clamping part clamp the bottom of one side of the packaging bag.

[0022] An embodiment of the present utility model also discloses a bottom opening device for bag making equipment, wherein a rotating protrusion is further provided on the bag clamping shaft, and the rotating protrusion is fixedly provided at the end of the bag clamping shaft away from the bag clamping wheel. The bottom opening device also includes a first fixed protrusion which is axially located on the inner side of the first protrusion and adapted to the rotating protrusion. In the rotation direction of the bag clamping shaft, the front end of the first fixed protrusion is located upstream of the front end of the first protrusion.

[0023] When the chuck is in a clamping state, the first fixed protrusion pushes against the rotating protrusion, and the clutch bag rotating shaft is linked to rotate, so that the chuck is aligned with the clutch bag part in the radial direction of the first turntable; and when the chuck is in a separated state, the rotating protrusion is separated from the first fixed protrusion, and the chuck and the clutch bag part are separated from each other in the radial direction.

[0024] The adjustment mechanism further includes a first adjustment protrusion extending along the circumference of the open-bottom rotating shaft and circumferentially adjustable relative to the first fixed protrusion. In the radial direction of the open-bottom rotating shaft, the first adjustment protrusion and the first fixed protrusion both protrude toward the rotating protrusion, with their ends radially aligned.

[0025] By adopting the above technical solution, a rotating protrusion is fixedly provided on the bag clamping shaft. When the rotating protrusion and the first fixed protrusion abut and rotate, and the chuck is aligned with the bag clamping part in the radial direction of the first turntable, the first protrusion pushes the bag clamping shaft, which facilitates the chuck and the bag clamping part to clamp the bottom of one side of the packaging bag, and a first adjusting protrusion is further provided. By adjusting the position of the first adjusting protrusion, the overall length of the first adjusting protrusion and the first fixed protrusion in the circumferential direction can be adjusted, thereby adjusting the length of time that the rotating protrusion abuts and rotates, and thereby adjusting the length of time that the chuck and the bag clamping part clamp the bottom of one side of the packaging bag.

[0026] An embodiment of the present utility model also discloses a bottom opening device of a bag making equipment, wherein the first adjusting protrusion and the second protrusion can be synchronously adjusted along the circumference of the bottom opening rotating shaft, wherein, in the rotation direction of the bottom opening rotating shaft, the first fixed protrusion is located upstream of the first adjusting protrusion, and the first protrusion is located upstream of the second protrusion.

[0027] Furthermore, in the rotation direction of the open-bottom rotating shaft, the downstream end of the first regulating protrusion is aligned with the downstream end of the second protrusion.

[0028] By adopting the above technical solution, the first adjustment protrusion and the second protrusion can be adjusted synchronously along the circumference of the bottom opening rotating shaft. When the bag making equipment needs to produce packaging bags of different sizes, the first adjustment protrusion and the second protrusion are adjusted synchronously, thereby more conveniently and accurately adjusting the length of time that the chuck and the bag clamping part clamp the bottom of one side of the packaging bag.

[0029] The present invention also discloses a bottom opening device for bag-making equipment, wherein the adjustment mechanism includes an adjustment motor and a rotary adjustment seat. The adjustment motor is fixedly mounted on one side of a frame, an adjustment screw is provided at the output end of the adjustment motor, and a screw slider adapted to the adjustment screw is provided on the adjustment screw. The screw slider is pivotally mounted on one side of the rotary adjustment seat.

[0030] The rotation adjustment seat comprises an adjustment sleeve which is rotatably sleeved on the outer periphery of the open-bottom rotating shaft, and the second protrusion and the first adjustment protrusion are fixedly arranged on the outer periphery of the adjustment sleeve.

[0031] By adopting the above technical solution, the second protrusion and the first adjustment protrusion are fixedly arranged on the outer periphery of the adjusting sleeve, and then the positions of the second protrusion and the first adjustment protrusion can be synchronously adjusted by rotating the adjusting sleeve. Further adjustment is carried out by coordinating the adjusting motor, the adjusting screw and the screw slider. Adjustment can be achieved by controlling the forward and reverse rotation of the adjusting motor, which makes adjustment more convenient and quick, and the adjustment accuracy is higher.

[0032] An embodiment of the present utility model also discloses a bottom opening device for bag making equipment, wherein a first elastic reset component is provided at one end portion of the bag clamping shaft close to the first turntable, and when the clamping head moves toward the bag clamping wheel and enters a clamping state, the first elastic reset component is compressed along the axial direction of the bag clamping shaft.

[0033] A second elastic return member is also provided at the end of the chuck away from the bag clamping shaft. One end of the second elastic return member is connected to one end of the chuck and the other end is connected to the second turntable. When the chuck rotates relative to the bag clamping wheel and enters a clamping state, the second elastic return member is stretched along the circumference of the bag clamping shaft.

[0034] Using the above technical solution, a first elastic reset component is provided at one end of the bag clamping shaft close to the first turntable. When the chuck moves toward the bag clamping wheel and enters the clamping state, the first elastic reset component is compressed along the axial direction of the bag clamping shaft. When the chuck is in the separated state, the first elastic reset component elastically resets to generate a driving force to push the bag clamping shaft to move in the direction away from the first turntable and prepare for the next bag clamping.

[0035] Similarly, one end of the second elastic return member is connected to one end of the chuck and the other end is connected to the second turntable. When the chuck rotates relative to the bag clamping wheel and enters a clamping state, the second elastic return member is stretched along the circumferential direction of the bag clamping shaft. When the chuck is in a separated state, the second elastic return member resets and drives the chuck to reset, and also prepares for the next bag clamping.

[0036] The embodiment of the utility model further discloses a bottom opening device of the bag making equipment, wherein the bag clamping part extends along the outer peripheral end surface of the first turntable, and the bag clamping part is provided with an air suction hole.

[0037] By adopting the above technical solution, an air suction hole is opened on the bag clamping part. When the bag clamping wheel rotates and the bag clamping part is close to the bottom of the bag, the air suction hole can absorb the bag body on one side that needs to be clamped by the clamp and separate the bag body on the other side, and make the separated bag body on the side and the bag clamping part sucked together, making it convenient for the clamp and the bag clamping part to clamp the bag body on this side, which can improve the accuracy and success rate of the clamp clamping the bag body, thereby reducing the scrap rate.

[0038] The embodiment of the utility model also discloses a bottom opening device of a bag making device, wherein an auxiliary bottom opening cam is provided in the middle of a pair of bottom opening mechanisms, the auxiliary bottom opening cam is fixedly arranged on the bottom opening rotating shaft, and an air suction component is also provided on the auxiliary bottom opening cam.

[0039] By adopting the above technical solution, an air suction component is set on the auxiliary bottom opening cam. During the bottom opening process, the air suction component can assist in adsorbing the bottom surface that needs to be opened and separated, which can also improve the accuracy and success rate of bag separation, thereby reducing the scrap rate.

[0040] In summary, the present invention discloses a bottom opening device for bag making equipment, comprising a bottom opening shaft rotatably mounted on a frame, a pair of bottom opening mechanisms spaced apart on the bottom opening shaft, the pair of bottom opening mechanisms being capable of clamping both sides of the bottom of the packaging bag in the width direction to facilitate opening the bottom of the packaging bag. Each bottom opening mechanism comprises a bag clamping wheel and a bag clamping shaft movable in the axial direction, a chuck adapted to the bag clamping wheel being provided on the bag clamping shaft, the bag clamping shaft being pushed by the first protrusion, thereby enabling the chuck and the bag clamping portion on the bag clamping wheel to cooperate to clamp one side of the bottom surface of the bag bottom of the packaging bag. When the bag making equipment needs to produce packaging bags of different sizes, by adjusting the circumferential position of the second protrusion relative to the first protrusion, thereby adjusting the overall length of the first protrusion and the second protrusion in the circumferential direction of the bottom opening shaft, the length of time that the chuck and the bag clamping portion clamp the bottom of one side of the packaging bag is further adjusted, which has the advantage of a simple and convenient adjustment method. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic structural diagram of a bottom opening device of a bag-making device provided in an embodiment of the present invention;

[0042] Figure 2 A schematic diagram of a partial structure of a bottom opening mechanism of a bottom opening device of a bag making apparatus provided by an embodiment of the present invention;

[0043] Figure 3 A schematic diagram of the partial structure of the adjustment mechanism of the bottom opening device of the bag making equipment provided by the embodiment of the utility model;

[0044] Figure 4 A schematic diagram of the overall structure of the adjustment mechanism of the bottom opening device of the bag making equipment provided by the embodiment of the utility model;

[0045] Figure 5 A schematic diagram of the partial structure of the second elastic return member of the bottom opening device of the bag making equipment provided by an embodiment of the utility model;

[0046] Figure 6 A schematic diagram of the partial structure of the auxiliary bottom-opening cam of the bottom-opening device of the bag-making equipment provided by an embodiment of the utility model.

[0047] Description of reference numerals:

[0048] 100, open bottom shaft;

[0049] 200, bottom opening mechanism;

[0050] 210, bag clamping wheel;

[0051] 211, first turntable;

[0052] 2111. Bag clamping part; 2112. Air suction hole;

[0053] 212, second turntable;

[0054] 220, bag clamping shaft;

[0055] 221, chuck; 222, rotating protrusion; 223, first elastic reset member;

[0056] 230, first protrusion;

[0057] 231. Protruding abutting surface; 232. Guide slope; 233. Adjustment groove;

[0058] 240, first fixing protrusion;

[0059] 250, second elastic reset member;

[0060] 260, auxiliary bottom opening cam;

[0061] 270, air intake components;

[0062] 300, regulating mechanism;

[0063] 310, second protrusion;

[0064] 311, adjusting the protrusion;

[0065] 320, first adjusting protrusion; 330, adjusting motor; 340, adjusting screw; 350, screw slider; 360, adjusting shaft sleeve; 370, fixing shaft sleeve. DETAILED DESCRIPTION

[0066] As mentioned in the background technology, with the development of technology, the materials and bag types of packaging bags have also been updated and developed rapidly. New bag types often appear for packaging bags made of various materials, or different bag types need to be produced according to demand. The sizes of different bag types are generally different. Therefore, some structures or components of the equipment may involve adjustment or replacement during the production process of packaging bags. For example, when the size of the packaging bag changes, the time that the chuck of the bottom opening mechanism clamps the bottom of one side of the bag during the bottom opening process may change. However, the conventional operation in the existing technology is generally to disassemble and replace the chuck of the new bottom opening mechanism, or replace the corresponding components that are compatible with the chuck, which requires downtime for a period of time, and there are problems of complex adjustment structure and low adjustment efficiency.

[0067] In the bottom opening device of the bag making equipment disclosed in the present invention, the bottom opening mechanism is basically the same as that in the prior art. By pushing against the bag clamping shaft, the clamping head on the bag clamping shaft and the bag clamping part on the bag clamping wheel cooperate to clamp one side of the bag body of the packaging bag, and then the bag bottom is stretched open. Furthermore, the present invention sets the pushing structure that pushes against the bag clamping shaft in an adjustable manner, specifically providing a first protrusion for pushing against the bag clamping shaft and an adjustable second protrusion. When the size of the packaging bag changes and the clamping time of the clamping head needs to be adjusted, the length of the pushing structure that pushes against the bag clamping shaft is adjusted by adjusting the relative position of the second protrusion and the first protrusion, thereby adjusting the time that the clamping head clamps the bottom of one side of the bag. The structure is simple and easy to adjust.

[0068] It should be noted that the large hub component that cooperates with the bottom opening mechanism to clamp the bag and open the bottom belongs to the existing technology. This application does not involve improvements to the large hub component, so this application will not go into details about the large hub component. The packaging bag disclosed in this utility model can be a packaging bag made of various materials such as paper bags, plastic bags, and non-woven bags. Before the bottom is opened, the packaging bag is pre-glued into a cylindrical shape and flattened to open the bottom.

[0069] Next, the bottom opening device of the bag making equipment disclosed in this application is explained in more detail with reference to the accompanying drawings:

[0070] The embodiment of the present invention discloses a bottom opening device for bag making equipment, including a frame (not shown) and a bottom opening rotating shaft 100, which is rotatably arranged on the frame. Figure 1 A pair of bottom opening mechanisms 200 are spaced apart on the bottom opening rotating shaft 100. The pair of bottom opening mechanisms 200 are respectively arranged on both sides of the packaging bag (not shown) in the bag body width direction, and an adjustment mechanism 300 is provided on one side of each bottom opening mechanism 200.

[0071] With this structural design, in the present application, a pair of bottom opening mechanisms 200 are respectively arranged on both sides of the packaging bag in the width direction of the bag body. The pair of bottom opening mechanisms 200 can clamp the two sides of the bag bottom of the packaging bag in the width direction, so that the bottom opening mechanism 200 and the large hub component cooperate to open the bag bottom of the packaging bag to realize the bottom opening action.

[0072] Each bottom opening mechanism 200 includes a bag clamping wheel 210 and a bag clamping shaft 220 provided on the bottom opening rotating shaft 100. The bag clamping wheel 210 is sleeved on the bottom opening rotating shaft 100 and can rotate synchronously with the bottom opening rotating shaft 100. In this embodiment, the bag clamping wheel 210 can be fixedly connected by splines, bolts, etc., or can be formed as an integral unit. Specifically, the bag clamping wheel 210 includes a first rotating disk 211 and a second rotating disk 212 separated from each other along the axial direction of the bottom opening rotating shaft 100, wherein the second rotating disk 212 is axially located outside the first rotating disk 211. See Figure 2A pocket portion 2111 extending along the circumference of the first turntable 211 is provided on the outer circumferential surface of the first turntable 211 .

[0073] See Figure 1 and Figure 2 The bag clamping shaft 220 in each bottom opening mechanism 200 extends parallel to the bottom opening shaft 100 and is rotatably arranged on the circumferential side of the second turntable 212, and the bag clamping shaft 220 corresponds to the bag clamping portion 2111 in the axial direction. It can be understood that the bag clamping shaft 220 is eccentrically arranged on the first turntable 211 and the second turntable 212 relative to the bottom opening shaft 100, and the bag clamping shaft 220 can move axially relative to the second turntable 212. The end of the bag clamping shaft 220 close to the bag clamping wheel 210 is provided with a clamping head 221 facing the side of the bag clamping portion 2111, and the clamping head 221 and the bag clamping portion 2111 cooperate and clamp one side of the bag body of the packaging bag.

[0074] More specifically, see Figure 2 A rotating protrusion 222 is also provided on the bag clamping shaft 220 , and the rotating protrusion 222 is fixedly provided at the end of the bag clamping shaft 220 away from the bag clamping wheel 210 .

[0075] The bottom opening mechanism 200 also includes a first protrusion 230 axially located outside the bag clamping shaft 220. The first protrusion 230 extends circumferentially along the bottom opening shaft 100 and projects toward the end of the bag clamping shaft 220 away from the bag clamping wheel 210. The first protrusion 230 remains stationary, while the bottom opening shaft 100 rotates synchronously with the bag clamping wheel 210. The linked clamping head 221 axially switches between a clamped state and a disengaged state relative to the first rotating disk 211. The bottom opening device also includes a first fixed protrusion 240 axially located inwardly of the first protrusion 230. The first fixed protrusion 240 mates with the rotating protrusion 222.

[0076] When the chuck 221 is in the clamping state, the first protrusion 230 abuts against the end of the bag clamping shaft 220 away from the bag clamping wheel 210. The first protrusion 230 pushes the bag clamping shaft 220 and the chuck 221 axially toward the first rotary disk 211, and the chuck 221 and the bag clamping portion 2111 jointly clamp the corresponding side of the bag body. Furthermore, when the chuck 221 is in the disengaging state, the first protrusion 230 separates from the end of the bag clamping shaft 220 away from the bag clamping wheel 210, and the chuck 221 and the bag clamping portion 2111 separate from each other in the axial direction.

[0077] In the present application, a second protrusion 310 is provided that is circumferentially adjustable relative to the first protrusion 230. The second protrusion 310 also extends circumferentially along the bottom-opening shaft 100. Both the second protrusion 310 and the first protrusion 230 protrude toward the end of the bag-clamping shaft 220 that is away from the bag-clamping wheel 210, and their ends are axially aligned. When the bag-making equipment needs to produce bags of different sizes, the time it takes for the clamping head 221 and the bag-clamping portion 2111 of the bag-clamping wheel 210 to cooperate in clamping the bottom of the bag may need to be changed. Therefore, the time it takes for the first protrusion 230 to push the bag-clamping shaft 220 and the clamping head 221 axially toward the first turntable 211 may need to be changed.

[0078] By adjusting the circumferential position of the second protrusion 310 relative to the first protrusion 230, the overall circumferential length of the first and second protrusions 230, 310, along the bottom-opening shaft 100 can be adjusted. This allows for adjustment of the duration that the first protrusion 230 presses against the bag-clamping shaft 220, thereby adjusting the duration that the clamping head 221 and the bag-clamping portion 2111 clamp the bottom of one side of the packaging bag. This method of adjusting only the second protrusion 310 offers the advantages of a simple adjustment structure and method, and reduces downtime for adjustments during production, thereby improving adjustment efficiency and production efficiency.

[0079] It should be noted that the bottom-opening shaft 100 drives the bag clamping wheel 210 and the bag clamping shaft 220 to rotate. When the bag clamping wheel 210 and the bag clamping shaft 220 rotate until the rotating protrusion 222 contacts the first fixed protrusion 240, the rotating protrusion 222 will rotate relative to the first fixed protrusion 240, and drive the bag clamping shaft 220 to rotate a certain angle, and make the clamping head 221 extend out of the end face of the bag clamping part 2111 to prepare for clamping the bottom of the packaging bag.

[0080] The open-bottom rotating shaft 100 continues to drive the bag clamping wheel 210 and the bag clamping rotating shaft 220 to rotate. When the first protrusion 230 abuts against the end of the bag clamping rotating shaft 220 away from the bag clamping wheel 210, the first protrusion 230 pushes the bag clamping rotating shaft 220 and the clamping head 221 to move axially toward the side of the first turntable 211, and then the clamping head 221 and the bag clamping part 2111 jointly clamp the corresponding side of the bag body.

[0081] Moreover, in the rotation direction of the bag clamping shaft 220, the front end of the first fixing protrusion 240 is located upstream of the front end of the first protrusion 230, so that the bag clamping shaft 220 first rotates to extend the clamping head 221, and then the first protrusion 230 pushes the bag clamping shaft 220 to move.

[0082] Similarly, when the chuck 221 is in the clamping state, the first fixed protrusion 240 pushes against the rotating protrusion 222, thereby rotating the bag clamping shaft 220. At this time, the rotation of the bag clamping shaft 220 is self-rotation, so that the chuck 221 is aligned with the bag clamping portion 2111 in the radial direction of the first rotating disk 211, or the chuck 221 can extend out of the bag clamping portion 2111 in the radial direction of the first rotating disk 211. When the chuck 221 is in the separated state, the rotating protrusion 222 is separated from the first fixed protrusion 240, and the chuck 221 and the bag clamping portion 2111 are separated from each other in the radial direction.

[0083] With this structural design, a rotating protrusion 222 is fixedly provided on the bag clamping shaft 220. When the rotating protrusion 222 and the first fixed protrusion 240 abut and rotate, and the clamping head 221 is aligned with the bag clamping part 2111 in the radial direction of the first turntable 211, the first protrusion 230 pushes the bag clamping shaft 220, making it easier for the clamping head 221 and the bag clamping part 2111 to clamp the bottom of one side of the packaging bag.

[0084] See Figure 1 and Figure 2 The adjustment mechanism 300 includes a second protrusion 310 extending along the circumference of the open-bottom rotating shaft 100. The second protrusion 310 is circumferentially adjustable relative to the first protrusion 230. In the axial direction, the second protrusion 310 and the first protrusion 230 both protrude toward the end of the bag clamping rotating shaft 220 away from the bag clamping wheel 210, and the ends are aligned in the axial direction. Figure 3 The second protrusion 310 can be adjusted along the circumferential direction relative to the first protrusion 230, so that the overall length of the second protrusion 310 and the first protrusion 230 in the rotation direction of the open-bottom rotating shaft 100 becomes longer or shorter.

[0085] The adjustment mechanism 300 also includes a first adjustment protrusion 320 extending circumferentially along the open-bottom rotating shaft 100. The first adjustment protrusion 320 is similarly circumferentially adjustable relative to the first fixed protrusion 240. In the radial direction of the open-bottom rotating shaft 100, both the first adjustment protrusion 320 and the first fixed protrusion 240 protrude toward the rotating protrusion 222, with their ends radially aligned. Similarly, the first adjustment protrusion 320 is circumferentially adjustable relative to the first fixed protrusion 240, thereby increasing or decreasing the overall length of the first adjustment protrusion 320 and the first fixed protrusion 240 in the rotational direction of the open-bottom rotating shaft 100.

[0086] Furthermore, by adjusting the position of the first adjusting protrusion 320 in the circumferential direction, the overall length of the first adjusting protrusion 320 and the first fixed protrusion 240 in the circumferential direction can be adjusted, thereby adjusting the length of time that the rotating protrusion 222 abuts and rotates, and thereby adjusting the length of time that the clamp 221 and the bag clamping part 2111 clamp the bottom of one side of the packaging bag.

[0087] In this embodiment, each bottom opening mechanism 200 includes a bag clamping wheel 210 and a bag clamping shaft 220 that can move axially. The bag clamping shaft 220 is provided with a clamping head 221 that is adapted to the bag clamping wheel 210. When the bag clamping wheel 210 rotates to a position adapted to the bottom of the packaging bag, the clamping head 221 is in a clamping state. At this time, the first protrusion 230 abuts against the end of the bag clamping shaft 220 away from the bag clamping wheel 210. The first protrusion 230 pushes the bag clamping shaft 220 and the clamping head 221 to move axially toward the first turntable 211. The clamping head 221 and the bag clamping part 2111 jointly clamp the corresponding side of the bag body. The clamping head 221 on the bag clamping shaft 220 and the bag clamping wheel 210 cooperate to achieve the bottom surface of one side of the bottom of the packaging bag, which has the advantage of a simple structure.

[0088] It should be noted that, in this embodiment, the bag clamping wheel 210 and the bag clamping shaft 220 will rotate with the open bottom shaft 100, while the first protrusion 230, the second protrusion 310, the first fixed protrusion 240 and the first adjusting protrusion 320 are relatively fixed and will not rotate with the open bottom shaft 100. Therefore, when the open bottom shaft 100 drives the bag clamping wheel 210 and the bag clamping shaft 220 to rotate, the rotating protrusion 222 will first contact the first fixed protrusion 240, and then rotate relative to the first fixed protrusion 240 and link the bag clamping shaft 220 to automatically rotate. The first rotary disc 211 is rotated so that the chuck 221 is aligned with the bag clamping portion 2111 in the radial direction of the first rotary disc 211 or extends radially beyond the bag clamping portion 2111, preparing for bag clamping. The open-bottom rotating shaft 100 drives the bag clamping wheel 210 and the bag clamping rotating shaft 220 to continue rotating. When the end of the bag clamping rotating shaft 220 away from the bag clamping wheel 210 abuts the first protrusion 230, the first protrusion 230 pushes the bag clamping rotating shaft 220 and the chuck 221 axially toward the first rotary disc 211. The chuck 221 and the bag clamping portion 2111 jointly clamp the corresponding side of the bag. The time for which the chuck 221 and the bag clamping portion 2111 jointly clamp the bag can be adjusted by adjusting the circumferential position of the second protrusion 310 on the open-bottom rotating shaft 100.

[0089] Those skilled in the art should understand that the second protrusion 310 and the first adjustment protrusion 320 can be adjusted synchronously or separately, and the specific adjustment method is not specifically limited in this embodiment.

[0090] The embodiment of the utility model also discloses a bottom opening device of the bag making equipment, see Figure 3 The first protrusion 230 and the second protrusion 310 partially overlap in the radial direction of the open-bottom rotating shaft 100. Furthermore, a protruding abutment surface 231 and a guiding slope 232 are provided on the side of the first protrusion 230 and the second protrusion 310 close to the bag clamping rotating shaft 220. The guiding slope 232 is located upstream of the protruding abutment surface 231 in the rotation direction of the open-bottom rotating shaft 100.

[0091] Further preferably, see Figure 3 In this embodiment, the first protrusion 230 and the second protrusion 310 are both configured as arc-shaped sheet structures.

[0092] With this structural design, the guiding bevel 232 can gradually abut against the end of the bag clamping shaft 220 away from the bag clamping wheel 210. During the abutment process, the guiding bevel 232 acts as a buffer, allowing a smooth transition between the end of the bag clamping shaft 220 and the first protrusion 230 or the second protrusion 310. This reduces the rigid impact between the end of the bag clamping shaft 220 and the protruding abutting surface 231, making the clamping head 221 smoother when clamping the bag bottom. This reduces wear on the end of the bag clamping shaft 220 and the first protrusion 230 or the second protrusion 310, and extends the service life of the bottom opening device.

[0093] When the position of the second protrusion 310 relative to the first protrusion 230 is adjusted, the length of the overlapping portion of the first protrusion 230 and the second protrusion 310 can be changed, thereby adjusting the overall length of the first protrusion 230 and the second protrusion 310, that is, adjusting the contact stroke between the bag clamping shaft 220 and the first protrusion 230 and the second protrusion 310. By adjusting the length of the clamping stroke, the contact time between the end of the bag clamping shaft 220 and the first protrusion 230 and the length of time that the clamp 221 and the bag clamping part 2111 clamp the bottom of one side of the packaging bag are finally adjusted. For example, when the packaging bag becomes larger, by reducing the overlapping portion of the first protrusion 230 and the second protrusion 310, the overall length of the first protrusion 230 and the second protrusion 310 is increased, so that the contact time between the end of the bag clamping shaft 220 and the first protrusion 230 and the second protrusion 310 is increased, and the length of time that the clamp 221 and the bag clamping part 2111 clamp the bottom of one side of the packaging bag is lengthened, so that a larger bottom surface can be accurately opened.

[0094] More specifically, in this embodiment, one of the first protrusion 230 and the second protrusion 310 is provided with an adjustment groove 233 , and the other is provided with an adjustment protrusion 311 adapted to the adjustment groove 233 , and the adjustment protrusion 311 can move along the adjustment groove 233 .

[0095] It should be noted that, in this embodiment, the length of the adjustment slot 233 can be designed and adjusted according to actual needs, and this embodiment does not make specific limitations on this. With this structural design, the adjustment slot 233 and the adjustment protrusion 311 are adapted for adjustment. The adjustment slot 233 can guide the adjustment protrusion 311, making the adjustment more accurate and the adjustment length easier to control, which is convenient for adjustment at any time in actual production.

[0096] The implementation method of this embodiment also discloses a bottom opening device of a bag making equipment, wherein the first adjustment protrusion 320 and the second protrusion 310 can be synchronously adjusted along the circumference of the bottom opening rotating shaft 100, wherein in the rotation direction of the bottom opening rotating shaft 100, the first fixed protrusion 240 is located upstream of the first adjustment protrusion 320, and the first protrusion 230 is located upstream of the second protrusion 310.

[0097] Furthermore, in the rotation direction of the open-bottom rotating shaft 100 , the downstream end of the first regulating protrusion 320 is aligned with the downstream end of the second protrusion 310 .

[0098] With this structural design, the first adjustment protrusion 320 and the second protrusion 310 can be synchronously adjusted along the circumference of the bottom opening shaft 100. When the bag making equipment needs to produce packaging bags of different sizes, the first adjustment protrusion 320 and the second protrusion 310 are synchronously adjusted, thereby more conveniently and accurately adjusting the length of time that the chuck 221 and the bag clamping part 2111 clamp the bottom of one side of the packaging bag.

[0099] This embodiment also discloses a bottom opening device for bag making equipment. Figure 4 The adjustment mechanism 300 includes an adjustment motor 330 and a rotary adjustment seat. The adjustment motor 330 is fixedly mounted on one side of the frame. An adjustment screw 340 is mounted on the output end of the adjustment motor 330. The adjustment screw 340 is further provided with a screw slider 350 adapted to the adjustment screw 340. The screw slider 350 is pivotally mounted on one side of the rotary adjustment seat.

[0100] See Figure 3 The rotary adjustment seat includes an adjustment sleeve 360 ​​rotatably mounted on the outer periphery of the open-bottom rotating shaft 100, and the second protrusion 310 and the first adjustment protrusion 320 are fixedly mounted on the outer periphery of the adjustment sleeve 360. It should be noted that the adjustment mechanism 300 in this application also includes a fixed sleeve 370, and the first protrusion 230 and the first fixed protrusion 240 are fixedly mounted on the fixed sleeve 370.

[0101] Please note that, see Figure 4 The screw slider 350 is pivotally arranged on one side of the rotating adjustment seat, which means that a rotating shaft is provided on the screw slider 350, and the screw slider 350 can be rotatably connected to the rotating adjustment seat through the rotating shaft. In this way, when the screw slider 350 moves along the adjusting screw 340, it can drive the rotating adjustment seat, that is, the adjusting sleeve 360 ​​to rotate, thereby adjusting the position of the first protrusion 230 and the first fixed protrusion 240.

[0102] With this structural design, the second protrusion 310 and the first adjustment protrusion 320 are fixedly arranged on the outer periphery of the adjustment sleeve 360, and the first protrusion 230 and the first fixed protrusion 240 are fixedly arranged on the fixed sleeve 370. Then, by rotating the adjustment sleeve 360 ​​relative to the fixed sleeve 370, the positions of the second protrusion 310 and the first adjustment protrusion 320 can be synchronously adjusted. Further, through the coordinated adjustment of the adjustment motor 330, the adjustment screw 340 and the screw slider 350, the rotational motion output by the adjustment motor 330 is converted into linear motion of the screw slider 350 through the adjustment screw 340 and the screw slider 350. During adjustment, the movement of the screw slider 350 can be achieved by controlling the forward and reverse rotation of the adjustment motor 330. Because the screw slider 350 is pivotally arranged on one side of the rotating adjustment seat, the movement of the screw slider 350 can also drive the rotating adjustment seat to rotate relative to it, making adjustment more convenient and quick, and with higher adjustment accuracy.

[0103] The embodiment of the present utility model also discloses a bottom opening device of a bag making device, see Figure 2 A first elastic return member 223 is provided at one end of the bag clamping shaft 220 close to the first turntable 211. When the clamping head 221 moves toward the bag clamping wheel 210 and enters the clamping state, the first elastic return member 223 is compressed along the axial direction of the bag clamping shaft 220.

[0104] It should be noted that, in this embodiment, only the first elastic return member 223 is exemplified. Those skilled in the art should understand that in actual production, the first elastic return member 223 should be hidden inside the first turntable 211, and one end of the first elastic return member 223 abuts against the bag clamping shaft 220, and the other end abuts against the inner wall of the first turntable 211. When the chuck 221 moves toward the side of the bag clamping wheel 210 and enters the clamping state, the first elastic return member 223 is compressed along the axial direction of the bag clamping shaft 220.

[0105] See Figure 5 A second elastic return member 250 is also provided at the end of the chuck 221 away from the bag clamping shaft 220. One end of the second elastic return member 250 is connected to one end of the chuck 221 and the other end is connected to the second turntable 212. When the chuck 221 rotates relative to the bag clamping wheel 210 and enters a clamping state, the second elastic return member 250 is stretched along the circumference of the bag clamping shaft 220.

[0106] It should be noted that, in this embodiment, the first elastic return member 223 and the second elastic return member 250 can both be configured as springs, or can be configured as rubber tubes or other elastic members, which is not specifically limited in this embodiment.

[0107] With this structural design, a first elastic reset member 223 is provided at one end of the bag clamping shaft 220 close to the first turntable 211. When the chuck 221 moves toward the side of the bag clamping wheel 210 and enters the clamping state, the first elastic reset member 223 is compressed along the axial direction of the bag clamping shaft 220. When the chuck 221 is in the separated state, the first elastic reset member 223 elastically resets to generate a driving force to push the bag clamping shaft 220 to move in the direction away from the first turntable 211 and prepare for the next bag clamping.

[0108] Similarly, one end of the second elastic return member 250 is connected to one end of the chuck 221 and the other end is connected to the second turntable 212. When the chuck 221 rotates relative to the bag clamping wheel 210 and enters a clamping state, the second elastic return member 250 is stretched along the circumference of the bag clamping shaft 220. When the chuck 221 is in a separated state, the second elastic return member 250 drives the chuck 221 to reset when it resets, and also prepares for the next bag clamping.

[0109] The embodiment of the present utility model also discloses a bottom opening device of a bag making device, see Figure 5 The bag clamping portion 2111 extends along the outer peripheral end surface of the first turntable 211 , and the bag clamping portion 2111 is provided with an air suction hole 2112 .

[0110] With this structural design, an air suction hole 2112 is opened on the bag clamping part 2111. When the bag clamping wheel 210 rotates and the bag clamping part 2111 is close to the bottom of the bag, the air suction hole 2112 can absorb the bag body on one side that needs to be clamped by the clamping head 221 and separate the bag body on the other side, and make the separated bag body and the bag clamping part 2111 sucked together, making it convenient for the clamping head 221 and the bag clamping part 2111 to clamp the bag body on this side, which can improve the accuracy and success rate of the clamping head 221 clamping the bag body, thereby reducing the scrap rate.

[0111] This embodiment also discloses a bottom opening device for bag making equipment. Figure 6 An auxiliary bottom opening cam 260 is further provided in the middle of the pair of bottom opening mechanisms 200 . The auxiliary bottom opening cam 260 is fixedly provided on the bottom opening rotating shaft 100 , and an air suction component 270 is also provided on the auxiliary bottom opening cam 260 .

[0112] Specifically, in this embodiment, the air suction component 270 is preferably provided on the cross bar of the auxiliary bottom opening cam 260. The air suction component 270 can be provided in 2, 3, 4 or even more quantities according to demand, and this embodiment does not make any specific limitation to this.

[0113] With this structural design, an air suction component 270 is provided on the auxiliary bottom opening cam 260. Similarly, during the bottom opening process, the air suction component 270 can assist in adsorbing the bottom surface that needs to be opened and separated, thereby improving the accuracy and success rate of bag separation and reducing the scrap rate.

[0114] In summary, the present invention discloses a bottom opening device for bag making equipment, comprising a bottom opening rotating shaft 100 rotatably mounted on a frame, a pair of bottom opening mechanisms 200 spaced apart on the bottom opening rotating shaft 100, the pair of bottom opening mechanisms 200 being capable of clamping both sides of the bottom of a packaging bag in the width direction to facilitate opening the bottom of the packaging bag. Each bottom opening mechanism 200 comprises a bag clamping wheel 210 and an axially movable bag clamping rotating shaft 220, the bag clamping rotating shaft 220 being provided with a clamping head 221 adapted to the bag clamping wheel 210, the bag clamping rotating shaft 220 being pushed by a first protrusion 230, thereby causing the clamping head 221 and the bag clamping portion 2111 on the bag clamping wheel 210 to cooperate to clamp one side of the bottom surface of the bag bottom. When the bag-making equipment needs to produce packaging bags of different sizes, by adjusting the circumferential position of the second protrusion 310 relative to the first protrusion 230, the overall circumferential length of the first protrusion 230 and the second protrusion 310 on the open-bottom rotating shaft 100 is adjusted, and the length of time that the clamping head 221 and the bag clamping part 2111 clamp the bottom of one side of the packaging bag is further adjusted, which has the advantages of simple adjustment structure and adjustment method.

[0115] Finally, the bottom opening process and adjustment process of the bottom opening device of the bag making equipment disclosed in the utility model are briefly described:

[0116] The bottom opening shaft 100 is rotatably mounted on the frame, and a pair of bottom opening mechanisms 200 are spaced apart on the bottom opening shaft 100 and located on both sides of the width direction of the bag body. The bottom opening shaft 100 drives the bag clamping wheel 210 and the bag clamping shaft 220 to rotate. During the rotation process, the rotating protrusion 222 will first contact the first fixed protrusion 240, then rotate relative to the first fixed protrusion 240 and link the bag clamping shaft 220 to rotate, so that the clamping head 221 is aligned with the bag clamping part 2111 in the radial direction of the first turntable 211 or extends out of the bag clamping part 2111 in the radial direction, preparing for bag clamping. The bottom opening shaft 100 drives the bag clamping wheel 210 and the bag clamping shaft 220 to continue rotating, and then The end of the rear bag clamping shaft 220 away from the bag clamping wheel 210 first gradually abuts against the guiding slope 232 of the first protrusion 230, and causes the bag clamping shaft 220 and the clamping head 221 to gradually move axially toward the first turntable 211. When the end of the bag clamping shaft 220 abuts against the protruding abutting surface 231, the clamping head 221 has moved with the bag clamping shaft 220 to the side of the bag clamping part 2111 and jointly clamps the corresponding side of the bag body with the bag clamping part 2111, and then the bottom is opened by the auxiliary bottom opening cam 260.

[0117] After the bottom opening is completed, the bottom opening shaft 100 drives the bag clamping wheel 210 and the bag clamping shaft 220 to continue to rotate. When the rotating protrusion 222 and the first adjusting protrusion 320 are separated, and the end of the bag clamping shaft 220 and the first protrusion 230 and the protruding abutment surface 231 of the second protrusion 310 are separated, the first elastic reset member 223 elastically resets to generate a driving force to push the bag clamping shaft 220 to move away from the first turntable 211, so that the clamping head 221 is in a separated state. At the same time, the second elastic reset member 250 will also drive the clamping head 221 to reset, and prepare for the next bottom opening. The bottom opening shaft 100 drives the bag clamping wheel 210 and the bag clamping shaft 220 to rotate continuously, and periodically performs the bottom opening action on each packaging bag conveyed.

[0118] When the size of the packaging bag that needs to be opened changes, for example, when the packaging bag becomes larger, the time that the clamp 221 clamps the bottom of the bag needs to be longer. At this time, the motor 330 is adjusted to rotate, and the screw slider 350 is moved to drive the rotating adjustment seat to adjust, thereby adjusting the position of the first adjustment protrusion 320 and the second protrusion 310 in the rotation direction of the bottom opening shaft 100, so that the overall length of the first fixed protrusion 240 and the first adjustment protrusion 320 in the rotation direction becomes longer. Similarly, the length of the first protrusion 230 and the second protrusion 310 is also lengthened, so that the contact time between the rotating protrusion 222 and the first adjustment protrusion 320 becomes longer, and the contact time between the end of the bag clamping shaft 220 and the second protrusion 310 also becomes longer, so that the time that the clamp 221 clamps the bottom of the bag also becomes longer.

[0119] When the packaging bag becomes smaller, the time that the clamp 221 clamps the bottom of the bag needs to be shortened. The positions of the first adjusting protrusion 320 and the second protrusion 310 in the rotation direction of the bottom opening shaft 100 are adjusted so that the overall length of the first fixed protrusion 240 and the first adjusting protrusion 320 in the rotation direction becomes shorter. Similarly, the length of the first protrusion 230 and the second protrusion 310 is also shortened, thereby shortening the time that the clamp 221 clamps the bottom of the bag. This adapts to the bottom opening requirements of packaging bags of different sizes, expands the applicability of the bottom opening device, and the bag-making equipment does not need to be shut down for too long for debugging.

[0120] It should be noted that, in addition to the implementation methods of the present invention described in the above-mentioned specific embodiments, those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention is introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation method. On the contrary, the purpose of introducing the utility model in conjunction with the implementation method is to cover other options or modifications that may be extended based on the claims of the present utility model. In order to provide an in-depth understanding of the present utility model, the above description contains many specific details, and the present utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0121] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0122] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the utility model.

[0123] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0124] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0125] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above description is provided to further illustrate the present invention in conjunction with specific embodiments, and that the present invention should not be construed as being limited to these descriptions. Those skilled in the art may make various changes in form and detail, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A bottom opening device for bag making equipment, characterized in that: The packaging bag comprises a frame and a bottom opening shaft rotatably arranged on the frame, wherein a pair of bottom opening mechanisms are arranged at intervals on the bottom opening shaft; wherein the pair of bottom opening mechanisms are respectively arranged on both sides of the packaging bag in the width direction of the bag body, and an adjustment mechanism is arranged on one side of each bottom opening mechanism; wherein Each of the bottom opening mechanisms comprises a bag clamping wheel and a bag clamping shaft arranged on the bottom opening shaft; wherein The bag clamping wheel is sleeved on the open-bottom rotating shaft and can rotate synchronously with the open-bottom rotating shaft. The bag clamping wheel includes a first rotating disc and a second rotating disc separated from each other along the axial direction of the open-bottom rotating shaft, wherein the second rotating disc is located outside the first rotating disc in the axial direction, and a bag clamping portion extending along the circumferential direction of the first rotating disc is provided on the outer peripheral surface of the first rotating disc; The bag clamping shaft extends parallel to the open-bottom rotating shaft and is rotatably arranged on the circumference of the second turntable at a position corresponding to the bag clamping portion in the axial direction. The bag clamping shaft can move along the axial direction relative to the second turntable and is provided with a clamping head facing the bag clamping portion at one end close to the bag clamping wheel. The bottom opening mechanism further includes a first protrusion located outside the bag clamping shaft in the axial direction, the first protrusion extending along the circumference of the bottom opening shaft and protruding toward an end portion of the bag clamping shaft away from the bag clamping wheel; and The open bottom rotating shaft rotates synchronously with the bag clamping wheel, and links the clamping head to switch between a clamping state and a separation state along the axial direction relative to the first rotating disk; When the chuck is in the clamping state, the first protrusion abuts against the end of the bag clamping shaft away from the bag clamping wheel, and the first protrusion pushes the bag clamping shaft and the chuck to move along the axial direction toward the first turntable, and the chuck and the bag clamping part jointly clamp the corresponding side of the bag body; and when the chuck is in the separating state, the first protrusion separates from the end of the bag clamping shaft away from the bag clamping wheel, and the chuck and the bag clamping part separate from each other in the axial direction; and The adjustment mechanism includes a second protrusion extending along the circumference of the open-bottom rotating shaft and adjustable along the circumference relative to the first protrusion; wherein, in the axial direction, the second protrusion and the first protrusion both protrude toward the end of one side of the bag clamping rotating shaft away from the bag clamping wheel and the ends are aligned in the axial direction.

2. The bottom opening device of the bag making equipment according to claim 1, characterized in that: The first protrusion and the second protrusion partially overlap in the radial direction of the open-bottom rotating shaft; and A protruding abutting surface and a guiding inclined surface are provided on one side of the first protrusion and the second protrusion close to the bag clamping rotating shaft. The guiding inclined surface is located on the upstream side of the protruding abutting surface in the rotation direction of the open-bottom rotating shaft.

3. The bottom opening device of the bag making equipment according to claim 2, characterized in that: One of the first protrusion and the second protrusion is provided with an adjusting groove, and the other is provided with an adjusting protrusion adapted to the adjusting groove, and the adjusting protrusion can move along the adjusting groove.

4. The bottom opening device of the bag making equipment according to claim 3, characterized in that: The first protrusion and the second protrusion are both configured as arc-shaped sheet structures.

5. The bottom opening device of the bag making equipment according to claim 4, characterized in that: The bag clamping shaft is further provided with a rotating protrusion, which is fixedly provided at the end of the bag clamping shaft away from the bag clamping wheel. The bottom opening device further comprises a first fixed protrusion located inside the first protrusion in the axial direction and adapted to the rotating protrusion. In the rotation direction of the bag clamping shaft, the front end of the first fixed protrusion is located upstream of the front end of the first protrusion. When the chuck is in the clamping state, the first fixed protrusion pushes against the rotating protrusion, and the bag clamping shaft is rotated in conjunction with the chuck, so that the chuck is aligned with the bag clamping portion in the radial direction of the first rotary disk; Furthermore, when the chuck is in the separated state, the rotating protrusion is separated from the first fixed protrusion, and the chuck and the clamping pocket are separated from each other in the radial direction; and The adjustment mechanism also includes a first adjustment protrusion extending along the circumference of the open-bottom rotating shaft and adjustable along the circumference relative to the first fixed protrusion; wherein, in the radial direction of the open-bottom rotating shaft, the first adjustment protrusion and the first fixed protrusion both protrude toward the rotating protrusion, and the ends are aligned in the radial direction.

6. The bottom opening device of the bag making equipment according to claim 5, characterized in that: The first adjusting protrusion and the second protrusion can be adjusted synchronously along the circumference of the open-bottom rotating shaft; in In the rotation direction of the open-bottom rotating shaft, the first fixing protrusion is located upstream of the first adjusting protrusion, and the first protrusion is located upstream of the second protrusion; and In the rotation direction of the open-bottom rotating shaft, the downstream end of the first adjusting protrusion is aligned with the downstream end of the second protrusion.

7. The bottom opening device of the bag making equipment according to claim 6, characterized in that: The adjustment mechanism includes an adjustment motor and a rotary adjustment seat; The adjusting motor is fixedly arranged on one side of the frame, an adjusting screw is provided at the output end of the adjusting motor, a screw slider adapted to the adjusting screw is further provided on the adjusting screw, and the screw slider is pivotally arranged on one side of the rotating adjusting seat; The rotation adjustment seat includes an adjustment sleeve rotatably sleeved on the outer periphery of the open-bottom rotating shaft, and the second protrusion and the first adjustment protrusion are fixedly arranged on the outer periphery of the adjustment sleeve.

8. The bottom opening device of the bag making equipment according to claim 7, characterized in that: A first elastic return member is provided at one end of the bag clamping shaft close to the first rotary disk, and when the clamping head moves toward the bag clamping wheel and enters the clamping state, the first elastic return member is compressed along the axial direction of the bag clamping shaft; A second elastic return member is also provided at the end of the chuck away from the bag clamping shaft, one end of the second elastic return member is connected to one end of the chuck, and the other end is connected to the second turntable. When the chuck rotates relative to the bag clamping wheel and enters the clamping state, the second elastic return member is stretched along the circumference of the bag clamping shaft.

9. The bottom opening device of the bag making equipment according to claim 7, characterized in that: The bag clamping portion extends along the outer peripheral end surface of the first turntable, and is provided with an air suction hole.

10. The bottom opening device of the bag making equipment according to claim 7, characterized in that: An auxiliary bottom-opening cam is further provided in the middle of the pair of bottom-opening mechanisms. The auxiliary bottom-opening cam is fixedly arranged on the bottom-opening rotating shaft, and an air suction component is also provided on the auxiliary bottom-opening cam.

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