Cross-sealing mechanism of a bag making machine

Abstract

The application discloses a cross-sealing mechanism of a bag making machine, which comprises a mounting bracket slidingly arranged on a rack of the bag making machine, an upper cross-sealing device and a lower cross-sealing device oppositely arranged on the mounting bracket, walking mechanisms arranged on both sides of the mounting bracket and used for driving the mounting bracket to move on the rack of the bag making machine, a power device used for driving a synchronous gear shaft through a transmission device, and a gear wheel rotatably connected to the mounting bracket through the synchronous gear shaft, wherein the power device comprises a hand wheel shaft rotatably arranged through an adjusting bearing seat and a hand wheel arranged on an outer end of the hand wheel shaft, and the transmission device comprises synchronous wheels respectively sleeved on the hand wheel shaft and the synchronous gear shaft and a synchronous belt engaged with the two synchronous wheels. The cross-sealing mechanism of the bag making machine is simple in structure and convenient to maintain.

Description

Technical Field

[0001] This application relates to the field of automated production technology, and in particular to a horizontal sealing mechanism for a bag making machine. Background Technology

[0002] A bag-making machine is a device used to produce various plastic packaging bags. With social development, plastic packaging bags have become an indispensable item in people's lives. A bag-making machine includes longitudinal sealing mechanisms, transverse sealing mechanisms, and punching mechanisms spaced apart along the conveying direction. Because different packaging bags have different sizes and specifications, the transverse sealing mechanism needs to be moved and positioned before sealing bags of different sizes. Existing transverse sealing mechanisms often use bevel gear transmissions, which are complex and occupy a large amount of space. Therefore, improvements are needed. Utility Model Content

[0003] The purpose of this invention is to provide a horizontal sealing mechanism for a bag making machine to overcome the shortcomings of the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: This utility model discloses a horizontal sealing mechanism for a bag making machine, including a mounting bracket slidably disposed on the frame of the bag making machine, an upper horizontal sealing device and a lower horizontal sealing device disposed opposite to the mounting bracket, and a movement mechanism for driving the mounting bracket to move on the frame of the bag making machine on both sides of the mounting bracket. The movement mechanism includes a gear rotatably connected to the mounting bracket via a synchronous gear shaft and a power device that drives the synchronous gear shaft via a transmission device. The two movement mechanisms share a synchronous gear shaft or the two synchronous gear shafts are coaxially connected. The power device includes a handwheel shaft rotatably disposed via an adjusting bearing seat and a handwheel disposed at the outer end of the handwheel shaft. The transmission device includes synchronous pulleys respectively sleeved on the handwheel shaft and the synchronous gear shaft and a synchronous belt meshing with the two synchronous pulleys.

[0005] Furthermore, in the horizontal sealing mechanism of the bag making machine described above, the mounting bracket is a frame structure, including an upper horizontal beam and a lower horizontal beam arranged opposite to each other, and a vertical beam supported on the upper horizontal beam and the lower horizontal beam bracket. Support seats for mounting the adjusting bearing seat are respectively provided on the outer side of the two vertical beams, and a clearance groove corresponding to the synchronous belt is provided in the support seat.

[0006] Furthermore, in the horizontal sealing mechanism of the bag making machine described above, the adjusting bearing seat includes a connecting frame and first bearing seats respectively disposed on both sides of the connecting frame. The synchronous wheel sleeved on the handwheel shaft is disposed inside the connecting frame. The first bearing seat is installed on the support seat by connecting bolts and is provided with adjusting bolts abutting against the support seat by means of threaded connection.

[0007] Furthermore, in the horizontal sealing mechanism of the bag making machine described above, the top and / or bottom openings of the connecting frame are provided.

[0008] Furthermore, in the horizontal sealing mechanism of the bag making machine described above, a locking block is provided on the outer wall of the first bearing seat near the handwheel. The locking block has a locking hole that is fitted onto the handwheel shaft. A locking groove that penetrates the locking block is provided on one side of the locking hole. A locking handle that connects the two sides of the locking groove is provided in the locking block.

[0009] Furthermore, in the horizontal sealing mechanism of the bag making machine described above, the upper horizontal sealing device includes an upper sealing knife with both ends slidably connected to the inner wall of the corresponding vertical beam and a cylinder for driving the upper sealing knife. The cylinder is mounted on the top of the upper horizontal beam via a height-equal seat.

[0010] Furthermore, in the horizontal sealing mechanism of the bag making machine described above, the piston rod of the cylinder is connected to the upper sealing knife in sequence through a positive and negative threaded screw and an adjusting screw cylinder, and the two ends of the positive and negative threaded screw are respectively machined with threads of opposite directions.

[0011] Furthermore, in the horizontal sealing mechanism of the bag making machine described above, the lower horizontal sealing device includes a lower sealing knife with both ends slidably connected to the inner wall of the corresponding vertical beam, and a motor that drives the lower sealing knife through two sets of cam mechanisms.

[0012] Furthermore, in the horizontal sealing mechanism of the bag making machine described above, the cam mechanism includes a cam that is rotatably mounted via a drive shaft. The drive shaft is rotatably mounted on the lower crossbeam via a second bearing seat. The cam is connected to the lower sealing knife via a hinge seat. The motor is mounted on the lower crossbeam via a motor seat and is driven and connected to the drive shaft. The two drive shafts are rigidly connected via a coupling.

[0013] Furthermore, in the horizontal sealing mechanism of the bag making machine described above, one end of the drive shaft near the corresponding vertical beam is connected to a sensing plate via a locking ring. The top of the lower horizontal beam is provided with a sensor corresponding to the sensing plate. The sensing plate includes an arc-shaped adjusting seat and a sensing boss protruding from the outer wall of the adjusting seat. An arc-shaped groove is provided in the adjusting seat and is connected to the locking ring via mounting bolts.

[0014] Compared with the prior art, the horizontal sealing mechanism of the bag making machine of this utility model has a simple structure. The horizontal sealing mechanism moves through a synchronous belt, which simplifies the structure and facilitates maintenance. The adjustable bearing seat can simultaneously realize multiple functions such as rotating and installing the handwheel shaft, adjusting the tension of the synchronous belt, and locking the handwheel shaft. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 The diagram shown is a schematic diagram of the cover of the horizontal sealing mechanism of the bag making machine in a specific embodiment of this utility model.

[0016] Figure 2 The diagram shown is a structural schematic of the horizontal sealing mechanism of a bag-making machine in a specific embodiment of this utility model.

[0017] Figure 3 The diagram shown is a cross-sectional view of the horizontal sealing mechanism of a bag-making machine in a specific embodiment of this utility model.

[0018] Figure 4 The diagram shown is a structural schematic of the adjustable bearing seat in a specific embodiment of this utility model.

[0019] Figure 5 The diagram shown is a connection diagram of the cylinder, the positive and negative thread screws, and the adjusting screw in a specific embodiment of this utility model.

[0020] Figure 6 The diagram shown is a schematic diagram of the installation of the induction sheet in a specific embodiment of this utility model. Detailed Implementation

[0021] The technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Combination Figures 1 to 6As shown, a horizontal sealing mechanism for a bag-making machine includes a mounting bracket 1 slidably mounted on the frame of the bag-making machine, an upper horizontal sealing device 2 and a lower horizontal sealing device 3 disposed opposite to the mounting bracket 1. The mounting bracket 1 has a travel mechanism 4 on each side, which drives it to move on the frame of the bag-making machine. The travel mechanism 4 includes a gear 42 rotatably connected to the corresponding mounting bracket 1 via a synchronous gear shaft 41 and a power device that drives the synchronous gear shaft 41 via a transmission device 43. The two travel mechanisms 4 share a single synchronous gear shaft 41 or the two synchronous gear shafts 41 are coaxially connected. The power device includes a handwheel shaft 45 rotatably mounted via an adjusting bearing seat 44 and a handwheel 46 disposed at the outer end of the handwheel shaft 45. The transmission device 43 includes synchronous pulleys respectively sleeved on the handwheel shaft 45 and the synchronous gear shaft 41, and a synchronous belt meshing with the two synchronous pulleys.

[0023] In this technical solution, the frame of the bag-making machine is an existing structure, on which a rack meshes with a gear and a linear guide parallel to the rack is installed. The mounting bracket is mounted on the slider of the linear guide. When the position of the horizontal sealing mechanism needs to be adjusted, the handwheel on either side is rotated, driving the handwheel shaft to rotate, thereby driving the synchronous gear shaft and gear to rotate through the transmission device. The gear, in conjunction with the rack on the frame of the bag-making machine, realizes the movement of the horizontal sealing mechanism. The movement mechanisms on both sides share a synchronous gear shaft or two synchronous gear shafts are rigidly connected through conventional couplings, so that the two sides of the mounting bracket move synchronously. The synchronous belt drives the gear, simplifying the structure and facilitating maintenance.

[0024] For example, see Figures 1 to 3 As shown, the mounting bracket 1 is a frame structure, including an upper crossbeam 11 and a lower crossbeam 12 arranged opposite to each other, and a vertical beam 13 supported on the upper crossbeam 11 and the lower crossbeam 12. Support seats 14 for installing the adjusting bearing seat 44 are respectively provided on the outer side of the two vertical beams 13. The support seats 14 are provided with relief grooves corresponding to the timing belt.

[0025] In this technical solution, the upper crossbeam, lower crossbeam, vertical beam, and support base are all assembled from conventional plates. The surface of the mounting bracket is equipped with a protective cover, which isolates the cylinder and other parts that are prone to pinching from the outside, improving the safety of use. The protective cover also contains conventional junction boxes, valve plates, and pressure gauges, which transfer external power and air sources to the corresponding positions of the horizontal sealing mechanism. During the movement of the horizontal sealing mechanism, its internal cables and air pipes do not need to move. The support base is connected to the slider of the linear guide rail.

[0026] For example, see Figures 1 to 4As shown, the adjusting bearing seat 44 includes a connecting frame 441 and first bearing seats 442 respectively disposed on both sides of the connecting frame 441. The synchronous wheel sleeved on the handwheel shaft 45 is disposed inside the connecting frame 441. The first bearing seat 442 is installed on the support seat 14 by connecting bolts 443, and is provided with adjusting bolts 444 abutting against the support seat 14 by means of threaded connection.

[0027] In this technical solution, the first bearing housing is fixed to the corresponding side of the connecting frame by conventional methods such as bolts or welding. The handwheel shaft is rotatably mounted on the top of the support seat through the two first bearing housings. The overall installation height of the bearing housing is adjusted by adjusting the bolts, thereby adjusting the relative position of the two synchronous pulleys and thus adjusting the tension of the synchronous belt. In actual use, the locking nuts on the connecting bolts and adjusting bolts are loosened, and the adjusting bolts are rotated to adjust the length of the adjusting bolts extending out of the first bearing housings, that is, to adjust the gap between the first bearing housing and the support seat, and thus to adjust the overall installation height of the bearing housings. After adjustment, the adjusting bolts are completely fixed by the locking nuts to prevent loosening, and then the first bearing housings are fixed by the connecting bolts.

[0028] For example, see Figures 1 to 4 As shown, the top and / or bottom openings of the connecting frame 441 are provided.

[0029] In this technical solution, the connecting frame is provided with an opening to facilitate the installation of the synchronous pulley inside the connecting frame.

[0030] For example, see Figures 1 to 4 As shown, a locking block 445 is provided on the outer wall of the first bearing seat 442 near the handwheel. A locking hole is provided in the locking block 445 and fitted onto the handwheel shaft 45. A locking groove is provided on one side of the locking hole and passes through the locking block. A locking handle 446 is provided in the locking block and connects the two sides of the locking groove.

[0031] In this technical solution, the locking block is fixed to the side of the corresponding first bearing seat by bolts, etc. The locking handle is an existing structure. The two sides of the locking groove are respectively provided with through holes and threaded holes corresponding to the locking handle. The stud of the locking handle passes through the through hole and connects to the threaded hole. By rotating the handle to lock or release the locking groove, the locking hole is locked or the handwheel shaft is released. After the horizontal sealing mechanism is moved, the gear is fixed by locking the handwheel shaft with the locking block.

[0032] For example, see Figures 1 to 3 and Figure 5 As shown, the upper horizontal sealing device 2 includes an upper sealing knife 21 with both ends slidably connected to the inner wall of the corresponding vertical beam 13 and a cylinder 22 for driving the upper sealing knife 21. The cylinder 22 is set at the top of the upper horizontal beam 11 through a level seat 23.

[0033] In this technical solution, the cylinder drives the upper sealing knife to move up and down reciprocally to achieve horizontal sealing of the packaging bag. The equalizing seat includes an equalizing column fixed to the top of the upper crossbeam and a cylinder mounting plate fixed to the top of the equalizing column, which improves the consistency of the cylinder installation height.

[0034] For example, see Figures 1 to 3 and Figure 5 As shown, the piston rod of cylinder 22 is connected to the upper sealing knife 21 in sequence through a positive and negative thread screw 24 and an adjusting screw 25. The two ends of the positive and negative thread screw are respectively machined with threads of opposite directions.

[0035] In this technical solution, the positive and negative threaded screw connects the piston rod of the cylinder to the adjusting screw cylinder, that is, connects the piston rod of the cylinder to the upper sealing knife. The bottom of the adjusting screw cylinder has a mounting boss that is fixed to the top of the upper sealing knife by bolts, etc. The level of the upper sealing knife is adjusted by adjusting the length of the positive and negative threaded screw screw into the adjusting screw cylinder, ensuring the parallelism between the upper and lower sealing knives. The two ends of the positive and negative threaded screw screw are respectively machined with threads of opposite directions and connected to the piston rod of the cylinder and the adjusting screw cylinder, reducing the possibility of loosening. Conventional anti-loosening nuts can be configured to further improve the anti-loosening effect.

[0036] For example, see Figures 1 to 3 As shown, the lower horizontal sealing device 3 includes a lower sealing knife 31 with both ends slidably connected to the inner wall of the corresponding vertical beam 13, and a motor 33 that drives the lower sealing knife 31 through two sets of cam mechanisms 32.

[0037] In this technical solution, the sealing knife is driven by a motor to move up and down reciprocally to achieve horizontal sealing of the packaging bag.

[0038] For example, see Figures 1 to 3 As shown, the cam mechanism 32 includes a cam 322 rotatably mounted via 321, a drive shaft 321 rotatably mounted on the lower crossbeam 12 via a second bearing seat 323, a cam 322 connected to the lower sealing knife 31 via a hinge seat 324, a motor 33 mounted on the lower crossbeam 12 via a motor seat and driven by the drive shaft 321, and the two drive shafts 321 are rigidly connected by a coupling.

[0039] In this technical solution, the cam includes a conventional eccentric wheel and a connecting rod that is rotatably sleeved on the outer wall of the eccentric wheel via a bearing. The eccentric wheel is sleeved on the drive shaft, and the top of the connecting rod is hinged to the lower sealing knife via a conventional hinge seat. The motor drives the drive shaft to rotate through a synchronous belt transmission structure, and the two drive shafts are rigidly connected by a conventional coupling to ensure that the two drive shafts rotate synchronously.

[0040] For example, see Figure 3 and Figure 6As shown, a drive shaft 321 is connected to a sensing plate 326 at one end near the corresponding vertical beam 13 via a locking ring 325. The top of the lower crossbeam 12 is provided with a sensor 327 corresponding to the sensing plate 326. The sensing plate 326 includes an arc-shaped adjustment seat and a sensing boss protruding from the outer wall of the adjustment seat. An arc-shaped groove is provided in the adjustment seat and it is connected to the locking ring 325 by mounting bolts.

[0041] In this technical solution, the sensor uses an existing slot-shaped sensor and is fixed directly below the sensor plate by a conventional sensor bracket. The highest point of the cam is determined by the sensing boss. When the sensing boss enters between the sensors, the lower sealing knife is pushed to the highest position (the lower sealing knife contacts the surface of the packaging bag and seals horizontally). The horizontal sealing time is controlled by an external control device. The locking ring is a conventional optical axis fixing ring, and its end face is machined with threaded through holes corresponding to the arc-shaped groove, which facilitates the adjustment of the sensor plate's installation position and reduces assembly difficulty.

[0042] In summary, the horizontal sealing mechanism of this bag making machine has a simple structure. The horizontal sealing mechanism moves through a synchronous belt, which simplifies the structure and facilitates maintenance. The adjustable bearing seat simultaneously realizes multiple functions such as rotating and installing the handwheel shaft, adjusting the tension of the synchronous belt, and locking the handwheel shaft.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A horizontal sealing mechanism for a bag-making machine, characterized in that, The device includes a mounting bracket slidably mounted on the frame of a bag-making machine, an upper horizontal sealing device and a lower horizontal sealing device disposed opposite to the mounting bracket, and a movement mechanism on each side of the mounting bracket for driving it to move on the frame of the bag-making machine. The movement mechanism includes a gear rotatably connected to the corresponding mounting bracket via a synchronous gear shaft and a power device that drives the synchronous gear shaft via a transmission device. The two movement mechanisms share a synchronous gear shaft or the two synchronous gear shafts are coaxially connected. The power device includes a handwheel shaft rotatably mounted via an adjusting bearing seat and a handwheel disposed at the outer end of the handwheel shaft. The transmission device includes synchronous pulleys respectively sleeved on the handwheel shaft and the synchronous gear shaft, and a synchronous belt meshing with the two synchronous pulleys.

2. The horizontal sealing mechanism of the bag-making machine according to claim 1, characterized in that: The mounting bracket is a frame structure, including an upper crossbeam and a lower crossbeam arranged opposite each other, and a vertical beam supported on the upper crossbeam and the lower crossbeam bracket. Support seats for mounting the adjusting bearing seat are respectively provided on the outer side of the two vertical beams, and a relief groove corresponding to the timing belt is provided in the support seat.

3. The horizontal sealing mechanism of the bag-making machine according to claim 2, characterized in that: The adjusting bearing housing includes a connecting frame and first bearing housings respectively disposed on both sides of the connecting frame. The synchronous wheel sleeved on the handwheel shaft is disposed inside the connecting frame. The first bearing housing is installed on the support seat by connecting bolts and is provided with adjusting bolts abutting against the support seat by means of threaded connection.

4. The horizontal sealing mechanism of the bag-making machine according to claim 3, characterized in that: The connecting frame has openings at its top and / or bottom.

5. The horizontal sealing mechanism of the bag-making machine according to claim 3, characterized in that: A locking block is provided on the outer wall of the first bearing seat near the handwheel. The locking block has a locking hole that fits onto the handwheel shaft. A locking groove is provided on one side of the locking hole that passes through the locking block. A locking handle is provided inside the locking block that connects the two sides of the locking groove.

6. The horizontal sealing mechanism of the bag-making machine according to claim 2, characterized in that: The upper horizontal sealing device includes an upper sealing knife with both ends slidably connected to the inner wall of the corresponding vertical beam and a cylinder for driving the upper sealing knife. The cylinder is mounted on the top of the upper horizontal beam via a height-equal seat.

7. The horizontal sealing mechanism of the bag-making machine according to claim 6, characterized in that: The piston rod of the cylinder is connected to the upper sealing knife in sequence through a forward and reverse threaded screw and an adjusting screw. The two ends of the forward and reverse threaded screw are respectively machined with threads of opposite directions.

8. The horizontal sealing mechanism of the bag-making machine according to claim 2, characterized in that: The lower horizontal sealing device includes a lower sealing knife with both ends slidably connected to the inner wall of the corresponding vertical beam, and a motor that drives the lower sealing knife through two sets of cam mechanisms.

9. The horizontal sealing mechanism of the bag-making machine according to claim 8, characterized in that: The cam mechanism includes a cam that is rotatably mounted via a drive shaft. The drive shaft is rotatably mounted on the lower crossbeam via a second bearing seat. The cam is connected to the lower sealing knife via a hinge seat. The motor is mounted on the lower crossbeam via a motor seat and is driven by the drive shaft. The two drive shafts are rigidly connected by a coupling.

10. The horizontal sealing mechanism of the bag-making machine according to claim 9, characterized in that: One end of the drive shaft near the corresponding vertical beam is connected to a sensing plate via a locking ring. The top of the lower crossbeam is provided with a sensor corresponding to the sensing plate. The sensing plate includes an arc-shaped adjustment seat and a sensing boss protruding from the outer wall of the adjustment seat. The adjustment seat is provided with an arc-shaped groove and is connected to the locking ring by mounting bolts.

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