Automatic bag feeding mechanism

Abstract

The utility model relates to an automatic bag feeding mechanism which comprises a machine frame and a bag conveying disc, a rail is arranged on the machine frame, an elastic piece is arranged on a first guide rail in a sleeved mode, the elastic piece is located on the side, away from the output end of the rail, of a first sliding block and abuts against the end face, away from the output end of the rail, of the first sliding block, and a first swing arm abuts against a vertical bag. The first sliding block is driven by a first driving device to act on the first guide rail in the direction of the compression elastic piece, the first swing arm abuts against the first limiting column after swinging, and the first sliding block pushes the vertical bags towards the output end along the rail through the first swing arm and enters bag mouth bayonets of the bag conveying disc. By the adoption of the technical scheme, the vertical bags are driven to enter the bag mouth bayonets through the elastic force of the elastic pieces, due to the fact that the elastic force of the elastic pieces has the upper limit, when the vertical bags are clamped, thrust of the elastic pieces to the vertical bags does not change, and the situation that the vertical bags are collided to be inclined due to inaccurate and stable thrust is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of packaging machinery technology, and in particular relates to an automatic bag feeding mechanism. Background Technology

[0002] In the packaging of liquid and semi-fluid products (such as jelly, juice, yogurt, sauce, detergent, etc.), spouted stand-up pouches have been widely used due to their advantages such as easy carrying, resealability, stability, and good barrier properties.

[0003] A patent document with publication number CN109421959A discloses a filling and conveying device for stand-up pouches with spouts, including a stand-up pouch feeding and conveying track and a stand-up pouch conveying mechanism disposed on one side of the stand-up pouch feeding and conveying track. The stand-up pouch conveying mechanism includes a bag conveying disc, a retaining ring disposed around the bag conveying disc, and a bag-pulling rod fixed to the lower side of the bag conveying disc. The bag conveying disc is a turntable that rotates around its axis. Multiple integrally formed material-pulling teeth are evenly arranged around the outer circumference of the bag conveying disc. The bottom of the material-pulling teeth has a bottle spout opening on one side of the rotation direction. The inner edge of the retaining ring is close to the opening of the bottle spout opening. The retaining ring has a notch. One side of the notch is close to the stand-up pouch feeding and conveying track, and the other side is close to the bag-pulling rod. The bag-pulling rod is disposed close to the conveying track and is fixed to the inner side of the bottle spout opening of the bag conveying disc.

[0004] The drawbacks of this solution are as follows: the upright bags on the conveyor track are pushed into the bottle mouth slot by a cylinder with a certain thrust. During this period, the cylinder must complete the pushing action in a short time when the slot rotates. However, the speed and rhythm of the cylinder are relatively fixed and the thrust control is not precise. When the upright bag is slightly stuck and the resistance increases, the rigid thrust of the cylinder can cause the bag mouth to bend, resulting in scrap. Furthermore, when the upright bag is pushed against the feeding teeth, the sharp edges of the feeding teeth can easily scratch the mouth of the upright bag, resulting in product defects. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the prior art by providing an automatic bag feeding mechanism, which solves the problem that the bag mouth is easily bent when the rigid thrust of the cylinder jams.

[0006] The technical solution of this utility model is as follows: An automatic bag feeding mechanism includes a frame and a bag conveying disc. The bag conveying disc is a turntable that rotates around its axis. A plurality of teeth are evenly arranged on the outer circumference of the bag conveying disc, and each tooth has a bag mouth opening on one side of the rotation direction. A track is provided on the frame, and the bag conveying disc is located at the end of the track. The bag mouth is hung on the track and moves. A first bag pushing assembly is provided on the frame. The first bag pushing assembly includes a first guide rail fixedly mounted on the frame, a first slider sliding on the first guide rail, and a first driving device for driving the first slider. An elastic element is sleeved on the first guide rail. The elastic element is located on the side of the first slider away from the track output end and abuts against the end face of the first slider away from the track output end. A first swing arm is rotatably connected to the first slider. The first swing arm abuts against the upright bag. The first slider is driven by the first driving device to move on the first guide rail in the direction of compressing the elastic element. A first limiting post is fixedly provided on the first slider. The first limiting post is located on the side of the first swing arm away from the track output end. After the first swing arm swings, it abuts against the first limiting post. The first slider pushes the upright bag along the track towards the output end through the first swing arm and enters the bag mouth slot of the bag transport tray.

[0007] Using the above technical solution, the elastic force of the elastic component drives each upright bag into the bag mouth slot, replacing the thrust of the cylinder with the elastic force of the elastic component. Since the elastic force of the elastic component has an upper limit, when the upright bag gets stuck, the thrust of the elastic component on the upright bag does not change, avoiding the situation where the upright bag is knocked off course due to inaccurate and unstable thrust. The first driving device slides the first slider along the direction of compressing the elastic component, that is, moves away from the bag conveying tray. During the compression process, the first swing arm is lifted towards the bag conveying tray by the compression of the upright bag. After the first swing arm passes through each upright bag without applying a movable thrust to the upright bag, the elastic component is compressed and stored, and the first driving device releases the internal lock on the output end. The first slider is pushed out by the elastic force of the elastic component. At this time, the first swing arm is lifted away from the bag conveyor by the interference and compression of the upright bag. After being lifted to a certain angle, it abuts against the first limit post. Then, when the first slider moves, the first swing arm is constrained by the first limit post and squeezes the upright bag towards the bag conveyor until it enters the bag mouth slot. Throughout the process, when the elastic component is in a compressed state, it always maintains elasticity, which can press the upright bag against the outer wall of the tooth. It is only necessary to ensure that the bag mouth slot passes through the track output end when the first slider moves towards the bag conveyor. The control is simple, and the energy released by the elastic component at the moment of action gives the upright bag a large acceleration, so that the upright bag can be steadily ejected into the bag mouth slot.

[0008] A further feature of this invention includes a second bag-pushing assembly. The second bag-pushing assembly includes a second guide rail fixedly mounted on the frame, a second slider sliding along the second guide rail, and a second driving device for driving the second slider. The second slider is driven by the second driving device to reciprocate on the second guide rail. A second swing arm is rotatably connected to the second slider. The second swing arm abuts against the bag mouth. A second limiting post is fixedly mounted on the second slider. The second limiting post is located on the side of the second swing arm away from the track output end. After the second swing arm swings, it abuts against the second limiting post.

[0009] With the above-mentioned further configuration, when the overall length of the frame is long and more upright bags can be processed at one time, the added second bag pushing component can push the upright bags into the stroke of the first slider. The second slider can achieve unidirectional pushing of the upright bags by reciprocating through the second swing arm and the second limit post. The structure and control are simple and convenient.

[0010] A further feature of this invention is that the track includes two base plates fixedly connected to the frame, the two base plates are on the same horizontal plane, and the two base plates form a track gap. The upright bag slides on the track gap, with the bag part below the track gap and the bag mouth part above the track gap.

[0011] By adopting the above-mentioned further configuration, the bag part of the upright bag is placed below the gap between the base plate and the track, so as to prevent the swing arms or other equipment from contacting and cutting the bag part of the upright bag, thus ensuring the upright bag. Similarly, the mouth part of the upright bag, which is relatively rigid, is placed above the gap between the tracks, so as to facilitate the pushing of each swing arm and realize the conveying of the upright bag.

[0012] A further feature of this invention is that the track gap includes a straight segment and an arc segment. The track gap is a straight segment within the stroke of the first slider and the second slider. The first guide rail and the second guide rail both extend along the straight segment of the track gap. The arc segment has the same rotation trajectory as the bag mouth latch.

[0013] With the above-mentioned further configuration, after passing through the straight section, the upright bag enters the bag mouth clamp. As the upright bag rotates with the bag transport disc in the bag mouth clamp, it is simultaneously within the arc section. During this period, the upright bag can be kept firmly in the bag mouth clamp, preventing the upright bag from falling off due to lack of clamping.

[0014] A further feature of this invention is that a positioning partition is provided on the frame, and the first guide rail is located between the end face of the positioning partition near the track output end and the inner side wall of the frame near the track output end. An opening is provided on the positioning partition for the upright bag to pass through.

[0015] With the above-mentioned further configuration, the positioning partition can control the length of the first guide rail and the stroke of the first slider, which is convenient for elastic components with sufficient elasticity coefficient.

[0016] A further improvement of this invention is that the opening of the bag mouth clip is rounded.

[0017] With the above-mentioned further design, the rounded chamfer ensures that when the stand-up bag follows the edge of the tooth to enter the bag mouth, and when the next stand-up bag contacts the edge of the tooth, the sharp corners of the tooth prevent the mouth of the stand-up bag from being cut and causing waste. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present utility model;

[0019] Figure 2 This is a top view of the internal structure of the frame and the bag conveying tray in a specific embodiment of this utility model;

[0020] Figure 3 This is a top view of the inside of the frame in a specific embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the first push bag assembly in a specific embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of the second push bag assembly in a specific embodiment of this utility model.

[0023] In the diagram: 1. Frame; 2. Track; 21. Base plate; 22. Track gap; 221. Straight section; 222. Arc section; 3. First guide rail; 4. First slider; 41. First swing arm; 42. First limiting post; 5. Elastic component; 6. First drive device; 7. Positioning partition; 8. Second guide rail; 9. Second slider; 91. Second swing arm; 92. Second limiting post; 10. Second drive device; 11. Bag transport tray; 12. Clamping teeth; 13. Bag mouth clamp. Detailed Implementation

[0024] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] like Figure 1-5 As shown, an automatic bag feeding mechanism includes a frame 1 and a bag conveying tray 11. The bag conveying tray 11 is a turntable that rotates around its axis. A plurality of locking teeth 12 are evenly arranged on the outer periphery of the bag conveying tray 11, and each locking tooth 12 has a bag mouth opening 13 on one side of the rotation direction.

[0029] The frame 1 is provided with a track 2, the bag conveying tray 11 is located at the end of the track 2, and the bag mouth is hung on the track 2 and moves. The track 2 includes two base plates 21 fixedly connected to the frame 1. The two base plates 21 are on the same horizontal plane, and a track gap 22 is formed between the two base plates 21. The bag is stuck on the track gap 22 and slides. The bag part is below the track gap 22, and the bag mouth is above the track gap 22.

[0030] The frame 1 is provided with a first bag pushing assembly and a second bag pushing assembly. The second bag pushing assembly is located on the upstream side of the first bag pushing assembly. After the upright bag is pushed by the second bag pushing assembly, it enters the pushing stroke of the first bag pushing assembly and is then pushed by the first bag pushing assembly to be stuck on the bag transport tray 11.

[0031] The first bag-pushing assembly includes a first guide rail 3 fixedly mounted on a frame 1, a first slider 4 sliding on the first guide rail 3, and a first driving device 6 for driving the first slider 4. A positioning partition 7 can be fixedly mounted on the frame 1. The first guide rail 3 is located between the end face of the positioning partition 7 near the output end of the track 2 and the inner sidewall of the frame 1 near the output end of the track 2. The positioning partition 7 has an opening for the bag to pass through. The first driving device 6 can be a cylinder, and its output end is fixedly connected to the first slider 4. An elastic element 5 is sleeved on the first guide rail 3. The elastic element 5 is located on the first slider 4 away from the output end of the track 2. The first slider 4 is rotatably connected to a first swing arm 41 on one side and abuts against the end face of the first slider 4 away from the output end of the track 2. The first swing arm 41 abuts against the upright bag above the track 2. The first slider 4 is driven by the first driving device 6 to move towards the compression elastic member 5 on the first guide rail 3. The first limit post 42 is fixedly provided on the first slider 4. The first limit post 42 is located on the side of the first swing arm 41 away from the output end of the track 2. After the first swing arm 41 swings, it abuts against the first limit post 42. The first slider 4 pushes the upright bag along the track 2 towards the output end through the first swing arm 41 and enters the bag mouth slot 13 of the bag transport tray 11.

[0032] The second push bag assembly includes a second guide rail 8 fixedly mounted on the frame 1, a second slider 9 sliding along the second guide rail 8, and a second drive device 10 for driving the second slider 9. In this embodiment, the second drive device 10 is slidably connected to the second guide rail 8. The second drive device 10 can be a servo drive motor. The second slider 9 is fixedly mounted on the second drive device 10 to realize that the second slider 9 slides along the second guide rail 8.

[0033] The second slider 9 is driven by the second driving device 10 to reciprocate on the second guide rail 8. The second slider 9 is rotatably connected to the second swing arm 91, which abuts against the mouth of the upright bag. The second slider 9 is fixedly provided with a second limiting post 92, which is located on the side of the second swing arm 91 away from the output end of the rail 2. After the second swing arm 91 swings, it abuts against the second limiting post 92.

[0034] In this embodiment, the first swing arm 41 and the second swing arm 91 have an opening at the end farther from the rotation point so that the mouth of the top of the upright bag can pass through. The first swing arm 41 and the second swing arm 91 only contact the part of the upright bag supported on the track 2 and push it to move.

[0035] The specific pushing action of the upright bags is as follows: After a group of upright bags enters the track 2, the second drive device 10 drives the second slider 9 to reciprocate along the second guide rail 8. When the second drive device 10 drives the second slider 9 to move away from the bag transport plate 11, the second swing arm 91 is lifted towards the bag transport plate 11 by the pressure of the upright bags. The second swing arm 91 passes through each upright bag without applying a movable pushing force to the upright bags until it reaches the end of its stroke and is detected by the sensor. Then, the second drive device 10 drives the second slider 9 to move towards the bag transport plate 11. At this time, the second swing arm 91 is lifted away from the bag transport plate 11 by the interference and squeezing of the upright bag. After being lifted at a certain angle, it abuts against the second limiting post 92. Then, under the action of the second slider 9, the second swing arm 91 is constrained by the second limiting post 92 and squeezes the upright bag to move a distance towards the bag transport plate 11. The upright bag pushes the upright bag on its downstream side into the stroke of the first slider 4. When the second drive device 10 moves to the end of the stroke again, it is detected by another sensor and moves in the opposite direction again, realizing the reciprocating action of the second drive device 10 driving the second slider 9.

[0036] After the upright bag enters the stroke of the first slider 4, the first drive device 6 slides the first slider 4 along the direction of the compression elastic member 5, that is, moves away from the bag conveying plate 11. During the compression process, the first swing arm 41 is squeezed by the upright bag and lifted towards the bag conveying plate 11. The first swing arm 41 passes through each upright bag without applying a movable thrust to the upright bag. At this time, the elastic member 5 is compressed and stored, and the first drive device 6 releases the internal lock on the output end. The first slider 4 is pushed out by the elastic force of the elastic member 5. At this time, the first swing arm 41 is squeezed by the interference of the upright bag and lifted away from the bag conveying plate 11. After being lifted at a certain angle, it abuts against the first limiting post 42. Subsequently, when the first slider 4 moves, the first swing arm 41 is constrained by the first limiting post 42 and squeezes the upright bag towards the bag conveying plate 11 until it enters the bag mouth latch 13.

[0037] Furthermore, when the overall length of the frame 1 is relatively long, and more upright bags can be processed at once, multiple second bag-pushing components can be added to push the upright bags sequentially until they reach the stroke of the first slider 4. In this embodiment, only one second bag-pushing component is shown. The second slider 9 can achieve unidirectional pushing of the upright bags by reciprocating through the second swing arm 91 and the second limiting post 92. The structure and control are simple and convenient.

[0038] In this embodiment, the track gap 22 includes a straight segment 221 and an arc segment 222. The track gap 22 is a straight segment 221 within the stroke of the first slider 4 and the second slider 9. The first guide rail 3 and the second guide rail 8 are both extended along the straight segment 221 of the track gap 22. The arc segment 222 has the same rotation trajectory as the mouthpiece 13. After passing through the straight segment 221, the upright bag enters the mouthpiece 13. When the upright bag rotates with the bag transport disc 11 in the mouthpiece 13, it is simultaneously within the arc segment 222. During this period, the upright bag can be fixed in the mouthpiece 13 to prevent the upright bag from falling off due to lack of clamping.

[0039] In this embodiment, the opening of the bag mouth latch 13 is rounded. The rounded corners prevent the sharp corners of the latch teeth 12 from cutting the mouth of the bag and causing waste when the bag enters the bag mouth latch 13 along the edge of the latch teeth 12 and when the next bag contacts the edge of the latch teeth 12.

[0040] Specifically, in this embodiment, the elastic force of the elastic element 5 drives each upright bag into the bag mouth latch 13, replacing the thrust of the cylinder with the elastic force of the elastic element 5. Since the elastic force of the elastic element 5 has an upper limit, when the upright bag gets stuck, the thrust of the elastic element 5 on the upright bag does not change, avoiding the situation where the upright bag is knocked off course due to inaccurate and unstable thrust. During the entire movement of the first slider 4, the elastic element 5 maintains elasticity when it is in a compressed state, which can press the upright bag against the outer wall of the latch 12. It is only necessary to ensure that the bag mouth latch 13 passes through the output end of the track 2 when the first slider 4 moves towards the bag transport plate 11. The control is simple, and the energy released by the elastic element 5 at the moment of action gives the upright bag a large acceleration, so that the upright bag can be steadily ejected into the bag mouth latch 13.

Claims

1. An automatic bag-loading mechanism, comprising a frame (1) and a bag-carrying disc (11), wherein the bag-carrying disc (11) is a turntable that rotates around its axis, and a plurality of teeth (12) are evenly arranged on the outer periphery of the bag-carrying disc (11), each tooth (12) having a bag mouth opening (13) on one side of the rotation direction, and a track (2) is provided on the frame (1), wherein the bag mouth is suspended and slides on the track (2), characterized in that, The frame (1) is provided with a first bag pushing assembly. The first bag pushing assembly includes a first guide rail (3) fixedly mounted on the frame (1), a first slider (4) sliding on the first guide rail (3), and a first driving device (6) driving the first slider (4) to move. An elastic member (5) is sleeved on the first guide rail (3). The elastic member (5) is located on the side of the first slider (4) away from the output end of the track (2) and abuts against the end face of the first slider (4) away from the output end of the track (2). A first swing arm (41) is rotatably connected to the first slider (4). The first swing arm (41) abuts against the upright bag above the track (2). The first slider (4) is driven by the first driving device (6) to move on the first guide rail (3) in the direction of compressing the elastic member (5). The first slider (4) is fixedly provided with a first limiting post (42). The first limiting post (42) is located on the side of the first swing arm (41) away from the output end of the track (2). After the first swing arm (41) swings, it abuts against the first limiting post (42). The first slider (4) pushes the upright bag along the track (2) toward the output end through the first swing arm (41) and enters the bag mouth slot (13) of the bag transport tray (11).

2. The automatic bag feeding mechanism according to claim 1, characterized in that, It also includes a second bag pushing assembly, which includes a second guide rail (8) fixedly mounted on the frame (1), a second slider (9) sliding along the second guide rail (8), and a second driving device (10) driving the second slider (9) to move. The second slider (9) is driven by the second driving device (10) to reciprocate on the second guide rail (8). A second swing arm (91) is rotatably connected to the second slider (9). The second swing arm (91) abuts against the mouth of the upright bag. A second limiting post (92) is fixedly mounted on the second slider (9). The second limiting post (92) is located on the side of the second swing arm (91) away from the output end of the track (2). After the second swing arm (91) swings, it abuts against the second limiting post (92).

3. The automatic bag feeding mechanism according to claim 2, characterized in that, The track (2) includes two base plates (21) fixedly connected to the frame (1). The two base plates (21) are on the same horizontal plane and form a track gap (22). The upright bag slides on the track gap (22). The bag part is below the track gap (22) and the mouth part of the upright bag is above the track gap (22).

4. The automatic bag feeding mechanism according to claim 3, characterized in that, The track gap (22) includes a straight segment (221) and an arc segment (222). The track gap (22) is a straight segment (221) within the stroke of the first slider (4) and the second slider (9). The arc segment (222) is the same as the rotation trajectory of the bag mouth latch (13).

5. An automatic bag-feeding mechanism according to claim 4, characterized in that, The first guide rail (3) and the second guide rail (8) are both extended along the straight section (221) of the rail gap (22).

6. An automatic bag-feeding mechanism according to claim 4, characterized in that, The frame (1) is provided with a positioning partition (7), and the first guide rail (3) is located between the end face of the positioning partition (7) near the output end of the track (2) and the inner side wall of the frame (1) near the output end of the track (2). The positioning partition (7) is provided with an opening for the upright bag to pass through.

7. An automatic bag-feeding mechanism according to claim 1, characterized in that, The opening of the bag mouth clip (13) is rounded.

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