Bag feeding device of packaging machine and packaging machine

Abstract

The utility model discloses a bag feeding device of a packaging machine, which belongs to the field of packaging equipment and is used for solving the problem of poor quality of preforming film materials at the rear end of an existing bag feeding mechanism, the bag feeding device comprises a rack, a bag feeding mechanism and a material pressing and conveying mechanism, the material pressing and conveying mechanism comprises a swing rod, a synchronous belt, a driving mechanism, a material pressing component and a guide plate, the synchronous belt is arranged on the swing rod, the driving mechanism is used for driving the synchronous belt to move, the material pressing assembly comprises material pressing strips evenly distributed on the synchronous belt, and the guide plate is located at the rear end of the bag conveying mechanism. In the working state, the swing rod rotates till the synchronous belt is parallel to the guide plate, a channel allowing the film materials and the products to be packaged to pass through is formed between the conveying belt and the guide plate, and a material pressing strip on the lower surface of the conveying belt is located in the channel. The bag feeding device and the packaging machine can effectively reduce the conditions of bending and wrinkling of film materials, improve the preforming quality of the film materials between the bag making mechanism and the middle sealing device, and further improve the packaging quality.

Description

Technical Field

[0001] The utility model relates to the field of packaging equipment, in particular to a bag feeding device of a packaging machine and the packaging machine. Background Art

[0002] In the packaging machinery industry, the bag-feeding mechanism is responsible for transporting the film and the product to be packaged to the bag-making mechanism. During the bag-making process, the film must tightly surround the product and be pre-formed into a cylindrical structure to facilitate subsequent steps such as sealing and cutting.

[0003] However, in related technologies, there's a gap between the bag-feeding mechanism and the conveying mechanism of the rear-end mid-sealing device. When the film material passes through this gap, due to a lack of sufficient conveying power and effective limiting measures, it's prone to unwanted bending and wrinkling during high-speed conveying. This causes the film material to deviate from the intended straight or smooth path, making it impossible to precisely control the ideal cylindrical shape during the pre-forming stage. This shape deviation not only directly affects the packaging's aesthetics, but more importantly, it can lead to serious consequences such as loose sealing and reduced product protection, ultimately adversely affecting the overall packaging quality of the product.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0005] (1) Technical problems solved

[0006] The utility model provides a bag feeding device of a packaging machine and the packaging machine, which at least solves the technical problem of how to improve the preforming quality of film material at the rear end of the bag making mechanism and reduce deformation of the film material.

[0007] (2) Technical solution

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] A bag feeding device of a packaging machine, comprising:

[0010] frame;

[0011] A bag feeding mechanism, provided on the frame, for conveying the film material and the product to be packaged to the bag making mechanism;

[0012] The material pressing and conveying mechanism includes a swing arm, a synchronous belt, a driving mechanism, a material pressing assembly and a guide plate. The swing arm is rotatably connected to the frame via a rotating shaft. The synchronous belt is provided on the swing arm. The driving mechanism is provided on the frame and is transmission-connected to the synchronous belt for driving the synchronous belt to move. The material pressing assembly includes a material pressing strip, which is connected to the synchronous belt, has elastic deformation capability, and is evenly distributed on the surface of the synchronous belt. The guide plate is provided on the frame and is located at the rear end of the bag feeding mechanism for supporting the film material and the product to be packaged output by the bag making mechanism.

[0013] Among them, in the working state, the rocker arm rotates until the synchronous belt is parallel to the guide plate, and a channel for the film material and the product to be packaged to pass through is formed between the conveyor belt and the guide plate, and the pressing strip on the lower surface of the conveyor belt is located in the channel.

[0014] In some embodiments, the driving mechanism includes a driving motor, a power shaft, a connecting shaft, a pulley and a tensioning pulley; the driving motor is arranged on the frame and is transmission-connected to the power shaft; the power shaft is rotatably sleeved in the rotating shaft and is transmission-connected to the connecting shaft, and the connecting shaft is rotatably connected to the rocker arm; the pulley is connected to the connecting shaft, the tensioning pulley is rotatably arranged on the rocker arm, and the synchronous belt is connected to the pulley and the tensioning pulley.

[0015] In some embodiments, the driving mechanism further includes synchronous wheels and a conveyor belt, the power shaft is connected to one synchronous wheel, the connecting shaft is connected to the other synchronous wheel, and the conveyor belt connects the two synchronous wheels.

[0016] In some embodiments, the rocker arm is a hollow structure, and the synchronous wheel and the conveyor belt are arranged inside the rocker arm.

[0017] In some embodiments, the pressing assembly further includes a connecting seat, which is fixedly connected to the conveyor belt and is provided with a socket; at least two of the pressing strips are connected into an integral structure through a plug, and the plug is inserted and fixed inside the socket.

[0018] In some embodiments, the pressing and conveying mechanism also includes a support rod, which is connected to the rocker arm; in a working state, the rocker arm rotates until the support rod contacts the guide plate or the frame, and is supported by the support rod and the rotating shaft so that the synchronous belt is parallel to the guide plate.

[0019] In some embodiments, the support rod is a screw rod and is threadedly connected to the rocker arm.

[0020] In some embodiments, the bag feeding mechanism includes a main shaft and several groups of driving wheels, belts, driven wheels, tensioning rods and tensioning springs; the main shaft is rotatably provided on the frame and is transmission-connected to the driving mechanism; the driving wheel is connected to the main shaft, the driven wheel is rotatably provided on the first end of the tensioning rod, and the belt is connected between the driving wheel and the driven wheel; the tensioning rod is rotatably connected to the frame through a pin shaft; one end of the tensioning spring is connected to the second end of the tensioning rod, and the other end is fixed relative to the frame, and is used to pull the tensioning rod and the driven wheel to tension the belt; wherein a conveying surface for conveying film materials and products to be packaged is formed between each group of belts.

[0021] The utility model also provides a packaging machine, comprising the above-mentioned bag feeding device.

[0022] (3) Beneficial effects

[0023] Compared with the prior art, the bag feeding device of the packaging machine and the packaging machine provided by the present invention have the following beneficial effects:

[0024] When the bag feeding device and the packaging machine are working, the film material and the product to be packaged are conveyed to the bag making mechanism through the bag feeding mechanism. After the film material is wrapped around the product to be packaged and pre-formed in the bag making mechanism, it is continued to be conveyed forward through the pressing and conveying mechanism. Specifically, the rocker arm first rotates until the synchronous belt is parallel to the guide plate, and a channel for the film material and the product to be packaged to pass through is formed between the conveyor belt and the guide plate. The pressing strip on the lower surface of the conveyor belt is located in the channel. In the process of the driving mechanism driving the conveyor belt to move, the pressing strip can drive the film material and the product to be packaged to be conveyed forward, that is, the pressing strip plays a role of conveying and limiting the film material and the product to be packaged, which can effectively reduce the bending and wrinkling of the film material, improve the pre-forming quality of the film material at the rear end of the bag making mechanism, and thus improve the packaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view of the bag feeding device and the packaging machine in the embodiment.

[0026] Figure 2 It is a front view of the bag feeding device in the embodiment.

[0027] Figure 3 It is a forward perspective view of the bag feeding device in the embodiment.

[0028] Figure 4 It is a three-dimensional view of the bag feeding device in the embodiment from the back.

[0029] Figure 5 It is a three-dimensional diagram of the pressing assembly in the embodiment.

[0030] Reference numerals:

[0031] Rack 1;

[0032] Bag feeding mechanism 2, main shaft 21, driving wheel 22, belt 23, driven wheel 24, tensioning rod 25, tensioning spring 26;

[0033] Pressing and conveying mechanism 3, rotating shaft 30, rocker arm 31, synchronous belt 32, driving mechanism 33, press assembly 34, guide plate 35, support rod 36, driving motor 331, power shaft 332, connecting shaft 333, pulley 334, tensioning pulley 335, synchronous pulley 336, conveyor belt 337, press strip 341, connecting seat 342, jack 343, plug 344;

[0034] Bag making mechanism 4. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] The bag-feeding mechanism of existing packaging machines feeds film and the product to be packaged into the bag-making mechanism. After the film wraps around the product and is preformed into a cylindrical structure, it is conveyed forward by the conveyor mechanism of the rear-end center-sealing device. Due to the large distance between the bag-feeding mechanism and the conveyor mechanism, the film between them lacks conveying power and position control, causing it to bend and wrinkle. This prevents it from being preformed into the desired shape, which in turn affects the subsequent packaging quality.

[0037] In order to solve the above technical problems, this embodiment provides a bag feeding device for a packaging machine, please refer to Figures 1 to 4 As shown, Figure 1 This is a front view of the bag feeding device and the packaging machine in the embodiment. Figure 2 This is a front view of the bag feeding device in the embodiment. Figure 3 This is a forward perspective view of the bag feeding device in the embodiment. Figure 4 It is a three-dimensional view of the bag feeding device in the embodiment from the back.

[0038] The bag delivery device of this embodiment is as follows Figure 1 As shown, it includes: a frame 1, a bag feeding mechanism 2 and a material pressing and conveying mechanism 3.

[0039] Bag feeding mechanism 2, such as Figure 2 As shown, it is arranged on the frame 1, and its function is to stably transport the film material and the product to be packaged to the bag making mechanism 4; the bag making mechanism 4 is used as a bag feeding device in an environment where it can be an existing bag making mechanism 4, and the bag feeding mechanism 2 can use the existing bag feeding mechanism 2.

[0040] The pressing and conveying mechanism 3, such as Figure 2As shown, it includes a swing arm 31, a synchronous belt 32, a driving mechanism 33, a pressing assembly 34 and a guide plate 35. The swing arm 31 is rotatably connected to the frame 1 through a rotating shaft 30 to adjust its position; the synchronous belt 32 is provided on the swing arm 31; the driving mechanism 33 is provided on the frame 1 and is transmission-connected to the synchronous belt 32 for driving the synchronous belt 32 to move; the pressing assembly 34 includes a pressing strip 341, which is connected to the synchronous belt 32, has elastic deformation capability, and is evenly distributed on the surface of the synchronous belt 32, and is used to apply pressure to the film material during the conveying process, drive the film material and the product to be packaged to be conveyed forward, and limit the film material and the product to be packaged to reduce wrinkles; the guide plate 35 is provided on the frame 1 and is located at the rear end of the bag feeding mechanism 2, and is used to support the film material and product output by the bag making mechanism 4;

[0041] Among them, in the working state, such as Figure 2 As shown, the rocker arm 31 rotates until the synchronous belt 32 is parallel to the guide plate 35, and a channel for the film material and products to pass through is formed between the conveyor belt 337 and the guide plate 35, and the pressing strip 341 on the lower surface of the conveyor belt 337 is located in the channel.

[0042] During operation, the bag-feeding device of the above technical solution conveys the film material and product to the bag-making mechanism 4 through the bag-feeding mechanism 2. The rocker arm 31 in the pressing and conveying mechanism 3 is cleverly designed to rotate to a position parallel to the synchronous belt 32 and the guide plate 35 during operation, thereby accurately constructing a channel for the film material and the product to be packaged to pass through. Within this channel, the pressing strip 341 integrated on the lower surface of the conveyor belt 337 not only serves as a power source to propel the film material and product forward, but also effectively limits the lateral movement of the film material through its stable contact surface, significantly reducing the bending and wrinkling of the film material during transportation. This innovative design improves the pre-forming quality of the film material between the bag-making mechanism 4 and the mid-sealing device, ensures the smooth appearance of the film material and the product, and lays the foundation for subsequent sealing operations. Ultimately, it achieves a significant improvement in the quality of the finished packaged product, meeting the market demand for high-quality packaging products.

[0043] In one embodiment of the transmission connection between the driving mechanism 33 and the synchronous belt 32, see Figure 3 and Figure 4As shown, the driving mechanism 33 includes a driving motor 331, a power shaft 332, a connecting shaft 333, a pulley 334 and a tensioning pulley 335; the driving motor 331 is fixed to the frame 1 through a motor base, and its output shaft is connected to the power shaft 332 directly or through a reducer; the interior of the rotating shaft 30 is hollow, and the power shaft 332 is rotatably sleeved in the rotating shaft 30 and can rotate relative to the rotating shaft 30. The power shaft 332 is also transmission-connected to the connecting shaft 333, and the connecting shaft 333 is rotatably connected to the rocker arm 31, can rotate relative to the rocker arm 31, and move as the rocker arm 31 swings around the rotating shaft 30; the pulley 334 is connected to the connecting shaft 333, and the tensioning pulley 335 is rotatably provided on the rocker arm 31, such as being connected to the rocker arm 31 through a pin shaft, and the synchronous belt 32 is connected to the pulley 334 and the tensioning pulley 335. When the driving mechanism 33 is working, the driving motor 331 drives the power shaft 332 , the connecting shaft 333 and the pulley 334 to rotate in sequence, thereby driving the synchronous belt 32 to move between the pulley 334 and the tensioning pulley 335 .

[0044] Exemplarily, the transmission connection between the power shaft 332 and the connecting shaft 333 is achieved through an existing transmission structure, such as a gear set transmission or a chain transmission.

[0045] For example, see Figure 3 and Figure 4 As shown, the transmission connection between the power shaft 332 and the connecting shaft 333 is achieved in the following manner: the driving mechanism 33 also includes a synchronous wheel 336 and a conveyor belt 337, the power shaft 332 is connected to one synchronous wheel 336, the connecting shaft 333 is connected to the other synchronous wheel 336, and the conveyor belt 337 connects the two synchronous wheels 336.

[0046] To improve the appearance and reduce the size of the device, refer to Figure 3 and Figure 4 As shown, the rocker arm 31 is a hollow structure, and the synchronous wheel 336 and the conveyor belt 337 are arranged inside the rocker arm 31. The rocker arm 31 forms a tubular structure, which can protect and hide the internal synchronous wheel 336 and the conveyor belt 337.

[0047] The above-mentioned pressing strips 341 are connected to the synchronous belt 32 and are evenly distributed on the surface of the synchronous belt 32. Figure 5 As shown, Figure 5 This is a three-dimensional diagram of the pressing assembly in the embodiment. The pressing assembly 34 also includes a number of connecting seats 342 evenly distributed along the surface of the synchronous belt 32. The connecting seats 342 are fixedly connected to the conveyor belt 337 by bonding or bolting, and are provided with sockets 343; at least two pressing strips 341 are connected into an integral structure through a plug 344, and the plug 344 is inserted and fixed on the inner side of the socket 343.

[0048] Exemplarily, the pressing strip 341 and the connecting seat 342 are made of silicone material.

[0049] In another embodiment (not shown) in which the pressing strips 341 are connected to the synchronous belt 32 and are evenly distributed on the surface of the synchronous belt 32 , the pressing strips 341 are directly fixed to the surface of the synchronous belt 32 by bonding or welding.

[0050] In order to ensure that the swing rod 31 can maintain a position parallel to the synchronous belt 32 and the guide plate 35 in the working state, refer to Figure 2 As shown, the pressing and conveying mechanism 3 also includes a support rod 36, which is connected to the rocker arm 31; in the working state, the rocker arm 31 rotates until the support rod 36 contacts the guide plate 35 or the frame 1, and is supported by the support rod 36 and the rotating shaft 30 so that the synchronous belt 32 is parallel to the guide plate 35.

[0051] The support rod 36 is a screw rod and is threadedly connected to the rocker arm 31 . The extended length can be adjusted by rotating relative to the rocker arm 31 , thereby adjusting the support height of the rocker arm 31 .

[0052] Exemplarily, a buffer washer is provided at the bottom end of the support rod 36 to reduce vibration during the support process.

[0053] In one embodiment of the above-mentioned bag feeding mechanism 2, see Figure 2 、 Figure 3 and Figure 4 As shown, the bag feeding mechanism 2 includes a main shaft 21 and several groups of driving wheels 22, belts 23, driven wheels 24, tensioning rods 25 and tensioning springs 26; the main shaft 21 is rotatably provided on the frame 1 and is transmission-connected with the driving mechanism 33, that is, it shares a driving mechanism 33 with the synchronous belt 32, thus ensuring the synchronization of the two; the driving wheel 22 is connected to the main shaft 21, and the driven wheel 24 is rotatably provided on the first end of the tensioning rod 25 through a pin shaft, and the belt 23 is connected between the driving wheel 22 and the driven wheel 24; the tensioning rod 25 is rotatably connected to the frame 1 through a pin shaft; one end of the tensioning spring 26 is connected to the second end of the tensioning rod 25, and the other end is fixed relatively to the frame 1, for pulling the tensioning rod 25 and the driven wheel 24 to tension the belt 23; wherein, a conveying surface for conveying film materials and products is formed between each group of belts 23. When the bag feeding mechanism 2 is in operation, the drive mechanism 33 drives the main shaft 21 to rotate, which in turn drives the driving pulley 22, belt 23, and driven pulley 24 of each group to rotate, thereby conveying the film material and product through the conveying surface formed by the belt 23. The tensioning spring 26 can pull the tensioning rod 25, causing the driven pulley 24 to move away from the driving pulley 22, thereby tensioning the belt 23. Compared with traditional tensioning mechanisms, the tensioning spring 26 and tensioning rod 25 have the advantages of simple structure, reliable tensioning, and easy installation.

[0054] This embodiment provides a packaging machine, see Figure 1As shown, the packaging machine includes the aforementioned bag feeding device, a bag making mechanism 4 at the rear end of the bag feeding mechanism 2, and a center sealing device at the rear end of the pressing and conveying mechanism 3. By using the bag feeding device, the packaging machine can effectively reduce bending and wrinkling of the film material, improve the pre-forming quality of the film material between the bag making mechanism 4 and the center sealing device, and thus improve the packaging quality.

[0055] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bag feeding device for a packaging machine, characterized in that: include: frame; A bag feeding mechanism, provided on the frame, for conveying the film material and the product to be packaged to the bag making mechanism; The material pressing and conveying mechanism includes a swing arm, a synchronous belt, a driving mechanism, a material pressing assembly and a guide plate. The swing arm is rotatably connected to the frame through a rotating shaft. The synchronous belt is provided on the swing arm. The driving mechanism is provided on the frame and is transmission-connected to the synchronous belt for driving the synchronous belt to move. The driving mechanism includes a conveyor belt. The material pressing assembly includes a material pressing strip, which is connected to the synchronous belt, has elastic deformation capability, and is evenly distributed on the surface of the synchronous belt. The guide plate is provided on the frame and is located at the rear end of the bag feeding mechanism for supporting the film material and the product to be packaged output by the bag making mechanism. Among them, in the working state, the rocker arm rotates until the synchronous belt is parallel to the guide plate, and a channel for the film material and the product to be packaged to pass through is formed between the conveyor belt and the guide plate, and the pressing strip on the lower surface of the conveyor belt is located in the channel.

2. The bag feeding device of the packaging machine according to claim 1, characterized in that: The driving mechanism includes a driving motor, a power shaft, a connecting shaft, a pulley and a tensioning pulley; The driving motor is arranged on the frame and is in transmission connection with the power shaft; The power shaft is rotatably sleeved in the rotating shaft and is drivingly connected to the connecting shaft, and the connecting shaft is rotatably connected to the rocker; The pulley is connected to the connecting shaft, the tensioning wheel is rotatably arranged on the rocker arm, and the synchronous belt is connected to the pulley and the tensioning wheel.

3. The bag feeding device of the packaging machine according to claim 2, characterized in that: The driving mechanism further comprises synchronous wheels, the power shaft is connected to one synchronous wheel, the connecting shaft is connected to the other synchronous wheel, and the conveyor belt is connected to the two synchronous wheels.

4. The bag feeding device of the packaging machine according to claim 3, characterized in that: The swing rod is a hollow structure, and the synchronous wheel and the conveyor belt are arranged inside the swing rod.

5. The bag feeding device of the packaging machine according to claim 1, characterized in that: The pressing assembly also includes a connecting seat, which is fixedly connected to the conveyor belt and is provided with a socket; at least two of the pressing strips are connected into an integral structure through a plug, and the plug is inserted and fixed inside the socket.

6. The bag feeding device of the packaging machine according to claim 1, characterized in that: The pressing and conveying mechanism also includes a support rod, which is connected to the rocker arm; in a working state, the rocker arm rotates until the support rod contacts the guide plate or the frame, and is supported by the support rod and the rotating shaft so that the synchronous belt is parallel to the guide plate.

7. The bag feeding device of the packaging machine according to claim 6, characterized in that: The support rod is a screw rod and is threadedly connected to the rocker rod.

8. The bag feeding device of the packaging machine according to claim 1, characterized in that: The bag feeding mechanism includes a main shaft and several sets of driving wheels, belts, driven wheels, tensioning rods and tensioning springs; The main shaft is rotatably mounted on the frame and is in transmission connection with the driving mechanism; The driving wheel is connected to the main shaft, the driven wheel is rotatably provided on the first end of the tensioning rod, and the belt is connected between the driving wheel and the driven wheel; The tensioning rod is rotatably connected to the frame via a pin; one end of the tensioning spring is connected to the second end of the tensioning rod, and the other end is fixed relative to the frame, and is used to pull the tensioning rod and the driven wheel to tension the belt; Wherein, a conveying surface for conveying film materials and products to be packaged is formed between the belts of each group.

9. A packaging machine, characterized in that: The bag delivery device comprises the bag delivery device according to any one of claims 1 to 8.

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