Feeding device used before packaging bag boxing

Abstract

The utility model relates to a feeding device for packaging bags before boxing, which comprises a first side pressing mechanism, a side pushing mechanism, a downward pressing mechanism, a second side pressing mechanism, a side pushing mechanism, a downward pressing mechanism, a lower overlying mechanism, an elastic bearing mechanism, a conveyor belt, a small tray and a large tray, the small tray and the large tray are positioned on the left side and the right side of the conveyor belt, and the first downward pressing mechanism, the side pressing mechanism and the side pushing mechanism are respectively positioned right above the small tray, on the side edge and at the front end of the small tray. A first discharge hole is formed in the rear end of the small tray; feeding cavities matched with the discharge hole are uniformly distributed on the conveyor belt; the second downward pressing mechanism, the second side pressing mechanism and the second side pushing mechanism are located over the large material disc, the side edge and the front end of the large material disc correspondingly, and the rear end of the large material disc extends to be provided with a discharging cavity which is located above the conveying belt and matched with the feeding cavity; the elastic bearing mechanism comprises a bearing plate which is arranged in the discharging cavity and the feeding cavity in a drawing, inserting and elastic moving mode, and the lower overlying mechanism is located above the discharging cavity and can push the bearing plate downwards; the large material disc and the small material disc are each provided with a first sensor. According to the automatic box packing machine, automatic overlying feeding can be achieved, the box packing efficiency is improved, and wrong packing and neglected packing are avoided.

Description

Technical Field

[0001] This utility model relates to the field of carton production line technology, specifically to a feeding device for packaging bags before cartoning. Background Technology

[0002] After the packaging bags are sorted and arranged in order by the packaging machine, they enter the cartoning machine in sequence. Since the outer size of the packaging bags is generally larger than that of the packaging boxes, if the packaging bags are not subjected to external pressure, folding or orientation adjustment during the cartoning process, they are prone to jamming or deformation during cartoning. In particular, when multiple packaging bags are stacked for cartoning, their thickness usually exceeds the inner cavity of the packaging box, making it basically impossible to carton them.

[0003] Currently, manual operation is the only option. Each bag is manually adjusted in direction, stacked, and its width and thickness are manually compressed. When the width and thickness are slightly smaller than the inner cavity of the box, the stack of bags is placed into the box one by one. This boxing method requires a lot of manpower, has limited boxing speed, low work efficiency, high production costs, cannot meet the needs of large-volume boxing, and is very likely to result in mis-packing or omissions. Utility Model Content

[0004] To address the existing problems, this utility model proposes a feeding device for packaging bags before boxing, which realizes automated stacking and feeding, improves boxing efficiency, reduces production costs, and avoids mis-packing and omissions.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A feeding device for packaging bags before boxing includes a first side pressing mechanism, a first side pushing mechanism, a first pressing mechanism, a second side pressing mechanism, a second side pushing mechanism, a second pressing mechanism, a lower stacking mechanism, an elastic support mechanism, a conveyor belt, and a small material tray and a large material tray located at the discharge ends of a small packaging machine and a large packaging machine, respectively. The large material tray and the small material tray are located on the left and right sides of the conveyor belt, respectively, and the small material tray is located behind the large material tray.

[0007] The first pressing mechanism, the first side pressing mechanism, and the first side pushing mechanism are located directly above, to the side, and at the front end of the small material tray, respectively. The small material tray has a first discharge port at the rear end. The conveyor belt is adjustable and evenly distributed with feeding chambers, and each feeding chamber is paired with the first discharge port.

[0008] The second pressing mechanism, the second side pressing mechanism, and the second side pushing mechanism are located directly above, to the side, and at the front of the large material tray, respectively. The large material tray has a second discharge port at the rear end, and a feeding chamber extends from the second discharge port. The feeding chamber is located above the conveyor belt and is paired with each feeding chamber. The elastic support mechanism is located at the end of the feeding chamber away from the second discharge port. The elastic support mechanism includes a support plate that can be inserted and elastically moved up and down in the space formed by the feeding chamber and the feeding chamber. The lower pressing mechanism is located directly above the feeding chamber and can push down the support plate. Both the large and small material trays are equipped with a first sensor for sensing whether there are packaging bags in the tray.

[0009] Preferably, the conveyor belt is equipped with a second sensor at the corresponding position in the feeding chamber.

[0010] Preferably, a gate mechanism is provided at the first discharge port. The gate mechanism includes a gate driver and a baffle. The gate driver is driven to connect with the baffle. The baffle is located outside the first discharge port and matches the size of the first discharge port.

[0011] Preferably, the conveyor belt has a lower limit mechanism above the feeding chamber that is paired with the first discharge port to prevent the packaging bag from exceeding the feeding chamber. The lower limit mechanism includes a lower limit cylinder and a limiting plate. The limiting plate is located at the pushing end of the lower limit cylinder and the limiting plate matches the space of the feeding chamber.

[0012] Preferably, the elastic support mechanism further includes a first fixed bracket, a first support cylinder, and a push platform bracket. The first support cylinder is fixed to one end of the first fixed bracket, the push end of the first support cylinder is connected to the push platform bracket, and the push platform bracket can slide left and right at the other end of the first fixed bracket. The support plate is elastically and vertically mounted on the push platform bracket via a first elastic shaft.

[0013] Preferably, the lower stacking mechanism includes a lower stacking fixing plate, a lower stacking cylinder, and a lower stacking plate. The lower stacking cylinder is fixed on the lower stacking fixing plate, and the pushing end of the lower stacking cylinder is connected to the lower stacking plate. The lower stacking plate has a feeding pusher plate extending downward at one end near the elastic support mechanism.

[0014] Preferably, the lower stacking mechanism further includes an intermediate plate located between the lower stacking fixing plate and the lower stacking plate. The pushing end of the lower stacking cylinder is connected to the intermediate plate. The four corners of the intermediate plate are connected to the lower stacking plate by directional bolts. A spring is sleeved on the directional bolt between the intermediate plate and the lower stacking plate. A proximity switch for detecting the bolt head of the directional bolt is fixed on the intermediate plate.

[0015] Preferably, the first side pressing mechanism, the first side pushing mechanism, the second side pressing mechanism, and the second side pushing mechanism all include a pushing cylinder and a pushing block. The pushing block is connected to the pushing end of the pushing cylinder, and a cylinder shaft cover plate is provided between the pushing block and the pushing end of the pushing cylinder.

[0016] Preferably, the first sensor of the large material tray includes an upper sensor and a lower sensor, which are fixed at the upper and lower positions on the side wall of the large material tray, respectively.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] In this invention, the thickness and width of the first packaging bag are automatically compressed through the cooperation of the first pressing mechanism and the first side pressing mechanism. The packaging bag is then pushed from the small material tray to the paired feeding chamber by the first side pushing mechanism. The thickness and width of the second packaging bag are automatically compressed through the cooperation of the second pressing mechanism and the second side pressing mechanism. When the support plate extends into the bottom of the feeding chamber, the packaging bag is pushed onto the support plate by the second side pushing mechanism. The lower stacking mechanism pushes the support plate into the feeding chamber, at which point the support plate retracts. Finally, the two packaging bags are stacked and transported forward by the conveyor belt. The feeding process is an infinite number of stacking and conveying cycles, thereby achieving automated stacking and feeding, improving cartoning efficiency, reducing production costs, and meeting the needs of large-volume cartoning. Furthermore, each feeding chamber is an independent stacking space, which ensures that the upper and lower bags are precisely aligned and maintain a fixed position during transportation, avoiding mutual compression or misalignment. Therefore, it can prevent mis-packing and missing packaging. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the feeding device of this utility model located on a packaging bag and box production line;

[0021] Figure 2 This is a first isometric view of the feeding device of this utility model;

[0022] Figure 3 This is a second isometric schematic diagram of the feeding device of this utility model;

[0023] Figure 4 for Figure 2 Enlarged schematic diagram of the stacking and feeding of small packaging bags at point A in the middle;

[0024] Figure 5 for Figure 3 Enlarged schematic diagram of the stacking and feeding of large packaging bags at point B;

[0025] Figure 6 This is a detailed schematic diagram of the lower stacking mechanism in this utility model;

[0026] Figure 7 This is a detailed schematic diagram of the elastic support mechanism in Embodiment 1 of this utility model;

[0027] Figure 8 This is a detailed schematic diagram of the elastic support mechanism in Embodiment 2 of this utility model.

[0028] Attached image labels:

[0029] 1. First side pressing mechanism; 2. First side pushing mechanism; 3. First downward pressing mechanism; 4. Second side pressing mechanism; 5. Second side pushing mechanism; 6. Second downward pressing mechanism; 7. Lower stacking mechanism; 71. Lower stacking fixing plate; 72. Lower stacking cylinder; 73. Lower stacking plate; 74. Material feeding push baffle; 75. Intermediate plate; 76. Orienting bolt; 77. Proximity switch; 8. Elastic support mechanism; 81. Support plate; 82. First fixed bracket; 83. First support cylinder; 84. Pushing platform bracket; 85. First elastic shaft; 86. Movable mounting plate; 87. Second fixed bracket; 88. Second support cylinder; 89. 9. Small material tray; 91. First discharge port; 92. Gate blocking mechanism; 93. Gate blocking driver; 94. Baffle; 10. Large material tray; 11. Second discharge port; 12. Side extension plate; 13. Discharge chamber; 20. Conveyor belt; 201. Partition plate; 202. Feed chamber; 30. First sensor; 301. Upper sensor; 302. Lower sensor; 40. Second sensor; 50. Lower limit mechanism; 501. Lower limit cylinder; 502. Limiting plate; 60. Cylinder shaft cover plate; 70. First conveyor belt; 80. Second conveyor belt; 90. Small packaging machine; 100. Large packaging machine; 101. Cartoning machine. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Example 1

[0034] like Figures 1 to 7 The present invention provides a feeding device for packaging bags before boxing, comprising a first side pressing mechanism 1, a first side pushing mechanism 2, a first pressing mechanism 3, a second side pressing mechanism 4, a second side pushing mechanism 5, a second pressing mechanism 6, a lower stacking mechanism 7, an elastic support mechanism 8, a conveyor belt 20, and a small material tray 9 and a large material tray 10 located at the discharge ends of a small packaging machine 90 and a large packaging machine 100, respectively. The small material tray 9 receives small packaging bags containing materials, and the large material tray 10 receives large packaging bags containing materials. The large material tray 10 and the small material tray 9 are located on the left and right sides of the conveyor belt 20, respectively, and the small material tray 9 is located behind the large material tray 10.

[0035] like Figure 3 and Figure 4 As shown, the first pressing mechanism 3, the first side pressing mechanism 1, and the first side pushing mechanism 2 are located directly above, to the side, and at the front end of the small material tray 9, respectively. The small material tray 9 has a first discharge port 91 at the rear end. The conveyor belt 20 is adjustablely and evenly distributed with feeding chambers 202. Specifically, the conveyor belt 20 is provided with multiple partitions 201. In this embodiment, three partitions 201 form a feeding section. The conveyor belt 20 is evenly provided with multiple feeding sections, and the conveyor belt 20 transports the material section by section. In each section, the space formed between the first two partitions 201 is the feeding chamber 202, and the space formed between the last two partitions 201 is the transition chamber. During operation, each feeding chamber 202 can be paired with the first discharge port 91. The pairing is reflected in the fact that each feeding chamber 202 can be aligned with the first discharge port 91 under the transmission of the conveyor belt 20, and the width of the feeding chamber 202 matches the size of the first discharge port 91.

[0036] like Figure 2 and Figure 5The second pressing mechanism 6, the second side pressing mechanism 4, and the second side pushing mechanism 5 shown are located directly above, to the side, and at the front end of the large material tray 10, respectively. The large material tray 10 has a second discharge port 11 at the rear end, and two side extension plates 12 extend from the second discharge port 11. A discharge cavity 13 is formed between the two side extension plates 12. The discharge cavity 13 is located above the conveyor belt 20 and is paired with each feeding cavity 202 on the conveyor belt 20. The pairing is reflected in the fact that each feeding cavity 202 can be aligned with the discharge cavity 13 under the transmission of the conveyor belt 20, and the size of the feeding cavity 202 matches the size of the discharge cavity 13.

[0037] The conveyor belt 20 is equipped with a second sensor 40 at the corresponding position of the unloading chamber 13, which is used to sense whether each feeding chamber 202 below the unloading chamber 13 already has a small package bag.

[0038] The elastic support mechanism 8 is located at the end of the feeding chamber 13 away from the second discharge port 11. The elastic support mechanism 8 includes a support plate 81, which can be inserted and removed in the space formed by the feeding chamber 13 and the feeding chamber 202, and can move up and down elastically in this space. The lower stacking mechanism 7 is located directly above the feeding chamber 13, and when the support plate 81 is inserted into the bottom of the feeding chamber 13, the lower stacking mechanism 7 can push the support plate 81 down into the feeding chamber 202.

[0039] In addition, both the large tray 10 and the small tray 9 are equipped with a first sensor 30 for sensing whether there are packaging bags in the tray;

[0040] In specific operation, first adjust the feeding chamber 202 on the conveyor belt 20 so that one of them is aligned with the first discharge port 91 on the small material tray 9, and adjust the distance between the small material tray 9 and the large material tray 10 to multiple feeding sections; start the device, and the small packaging bag falls from the first conveyor belt 70 at the discharge end of the small packaging machine 90 to the small material tray 9, where it is sensed by the first sensor 30 on the small material tray 9. The first sensor 30 transmits a signal to the controller. After receiving the signal, the controller first controls the first pressing mechanism 3 to press the small packaging bag downwards in a preset process and maintains the pressing state. Then, it controls the first side pressing mechanism 1 to press the small packaging bag to the front end of the first side pushing mechanism 2 in a preset process. Finally, it controls the first side pushing mechanism 2 to push the small packaging bag from the first side pressing mechanism 1 to the front end of the first side pushing mechanism 2. One discharge port 91 is pushed into the aligned feed chamber 202. After completion, the first pressing mechanism 3 returns to its initial state, and at this time the controller drives the conveyor belt 20 forward one feed section. Then the next small package continues to fall into the small material tray 9, and the process is repeated as described above. While the small package is transferred from the small packaging machine 90 into the conveyor belt 20, the large package is also being transferred. Specifically, the controller prioritizes controlling the second side pressing mechanism 4 to push to one side according to a preset process. Then the second conveyor belt 80 at the end of the large packaging machine 100 transports the large package onto the second side pressing mechanism 4. That is, the second side pressing mechanism 4 first receives the large package falling from the second conveyor belt 80, and then the second side pressing mechanism 4 retracts. During the retraction process... With the assistance of the side wall of the large material tray 10, the large packaging bag falls from the second side pressing mechanism 4 into the large material tray 10. At this time, the first sensor 30 on the large material tray 10 senses that there is a packaging bag in the large material tray 10 and transmits a signal to the controller. After receiving the signal, the controller first controls the second pressing mechanism 6 to press the large packaging bag downwards in a preset process and maintains the pressing state. Then, it controls the second side pressing mechanism 4 to press the large packaging bag to the front end of the second side pushing mechanism 5. Before this, the elastic support mechanism 8 has been activated to push the support plate 81 into the bottom of the feeding cavity 13. At this time, the support plate 81 is slightly lower than or flush with the bottom of the second discharge port 11. Then, the second side pushing mechanism 5 pushes the large packaging bag through the second discharge port 11 to the support plate 81. After the first step is completed, the second pressing mechanism 6 returns to its initial state. Then, if the second sensor 40 detects that there is a small packaging bag in the feeding chamber 202 below the feeding chamber 13, it transmits a signal to the controller. After receiving the signal, the controller controls the lower stacking mechanism 7 to push the support plate 81 downward into the feeding chamber 202 according to the preset process. After the process is completed, the elastic support mechanism 8 retracts the support plate 81. During the retraction of the support plate 81, the support plate 81 returns to its initial state under the elastic action of the elastic support mechanism 8. Finally, the large packaging bag is stacked on top of the small packaging bag. At this time, the lower stacking mechanism 7 returns to its initial state, and the controller drives the conveyor belt 20 to move forward one feeding section with the stacked packaging bags.Then the next large packaging bag falls from the second conveyor belt 80 onto the second side pressing mechanism 4 that pushes to one side, and the process is repeated as described above. If the second sensor 40 detects that there is no small packaging bag in the feeding chamber 202 below the unloading chamber 13, it transmits a signal to the controller. The controller does not start the lower stacking mechanism 7, but controls the conveyor belt 20 to continue to move forward one feeding section. The feeding process before boxing is an infinite number of stacking and conveying cycles.

[0041] It should be noted that since the large material tray 10 receives large packaging bags, if the large packaging bags fall directly from the second conveyor belt 80 to the large material tray 10, the state of the large packaging bags will be unstable, which will affect the subsequent side pressing and side pushing operations. Therefore, before the second pressing mechanism 6 is operated, the second side pressing mechanism 4 is driven to push to one side according to the preset process. This can play a connecting role and improve the stability of the stacking and feeding of large packaging bags.

[0042] The first pressing mechanism 3, the first side pressing mechanism 1, the second pressing mechanism 6, and the second side pressing mechanism 4 automatically compress small and large packaging bags according to a preset process, ensuring that both bags achieve suitable thickness and width, reducing overall volume and making their dimensions compatible with the feeding specifications of the subsequent cartoning machine 101. Combined with the cooperation of the first sensor 30, the first side pushing mechanism 2, the second side pushing mechanism 5, the elastic support mechanism 8, the second sensor 40, the lower stacking mechanism 7, and the conveyor belt 20, automated stacking and feeding are achieved, improving cartoning efficiency, reducing production costs, and meeting the needs of large-volume cartoning. Furthermore, each feeding chamber 202 is an independent stacking space, ensuring precise alignment of the upper and lower bags and maintaining a fixed position during transport, avoiding mutual compression or misalignment, thus preventing incorrect or missing packaging.

[0043] Furthermore, since the small material tray 9 receives small packaging bags containing materials, and these small packaging bags are lightweight, when they fall from the first conveyor belt 70 at the discharge end of the small packaging machine 90 to the small material tray 9, they are prone to flying directly out of the first discharge port 91. To avoid this phenomenon, a gate mechanism 92 is installed at the first discharge port 91. Figure 4 As shown, the gate mechanism 92 includes a gate driver 93 and a baffle 94. The gate driver 93 is driven to connect with the baffle 94. The baffle 94 is located outside the first discharge port 91 and matches the size of the first discharge port 91. Before the small packaging bag enters the small material tray 9, the gate driver 93 is controlled to push the baffle 94 to close the first discharge port 91. When the small packaging bag is squeezed to the front end of the first side push mechanism 2, the gate driver 93 retracts the baffle 94 to open the first discharge port 91. At this time, the first side push mechanism 2 can push the small packaging bag into the aligned feeding chamber 202.

[0044] Furthermore, such as Figure 4As shown, the conveyor belt 20 has a lower limit mechanism 50 above the feeding chamber 202, which is paired with the first discharge port 91. The lower limit mechanism 50 includes a lower limit cylinder 501 and a limiting plate 502. The limiting plate 502 is located at the pushing end of the lower limit cylinder 501. The space of the limiting plate 502 matches that of the feeding chamber 202. When the small packaging bag is squeezed to the front end of the first side push mechanism 2, the lower limit cylinder 501 is first controlled to push the limiting plate 502 down into the feeding chamber 202 according to a preset process. Then, the first side push mechanism 2 pushes the small packaging bag into the feeding chamber 202. The lower limit mechanism 50 is in place first, which can prevent the small packaging bag from flying out of the feeding chamber 202 during the process of being pushed into the feeding chamber 202, and increase the stability of the small packaging bag transfer.

[0045] Furthermore, such as Figure 7 As shown, the elastic support mechanism 8 also includes a first fixed bracket 82, a first support cylinder 83, and a push platform bracket 84. The first support cylinder 83 is fixed to one end of the first fixed bracket 82 away from the conveyor belt 20. The push end of the first support cylinder 83 is connected to the push platform bracket 84, and the push platform bracket 84 can slide left and right at the other end of the first fixed bracket 82. The support plate 81 is elastically and vertically movable on the push platform bracket 84 via the first elastic shaft 85.

[0046] Specifically, the platform support 84 is driven by the first support cylinder 83 to slide forward or backward along the transverse slide rail at the other end of the first fixed support 82, thereby pushing the support plate 81 towards the unloading chamber 13 or restoring it to its initial state. This setting can improve the stability of the support plate 81 moving forward or backward.

[0047] The push platform support 84 is equipped with a vertical slide rail. The push plate pad locks the support plate 81 onto the vertical slider, which is slidably mounted on the vertical slide rail. A first elastic shaft 85 is located above the push plate pad, with the other end of the first elastic shaft 85 extending through the top of the push platform support 84. A spring is provided between the first elastic shaft 85 and the push plate pad above the push platform support 84. Therefore, when the pressing mechanism 7 pushes the support plate 81 downward, the support plate 81 will cause the push plate pad to move downward. When the vertical slider slides down along the vertical slide rail, the spring is stretched. When the first support cylinder 83 retracts the support plate 81 and the support plate 81 loses the external force pushing it downward, the spring retracts under the elastic action of the spring, causing the support plate 81 to return to its initial state. In addition, when the second side push mechanism 5 pushes the large packaging bag onto the support plate 81 through the second discharge port 11, the push plate pad can limit the large packaging bag, allowing the large packaging bag to smoothly enter each feeding chamber 202.

[0048] Furthermore, such as Figure 6As shown, the lower stacking mechanism 7 includes a lower stacking fixing plate 71, a lower stacking cylinder 72, and a lower stacking plate 73. The lower stacking cylinder 72 is fixed on the lower stacking fixing plate 71, and the pushing end of the lower stacking cylinder 72 is connected to the lower stacking plate 73. The lower stacking plate 73 has a feeding pusher 74 extending downward at one end near the elastic support mechanism 8. When the second sensor 40 senses that there is a small packaging bag in the feeding chamber 202 below the feeding chamber 13, the controller will control the lower stacking cylinder 72 to push the lower stacking plate 73 downward. At this time, the feeding pusher 74 also moves downward to push the support plate 81 along with the large packaging bag into the feeding chamber 202. When the support plate 81 is retracted, the feeding pusher 74 uses its downwardly extending part to block the large packaging bag in the feeding chamber 202, preventing the large packaging bag from being retracted along with the support plate 81.

[0049] Furthermore, the lower stacking mechanism 7 also includes an intermediate plate 75 located between the lower stacking fixing plate 71 and the lower stacking plate 73. The pushing end of the lower stacking cylinder 72 is connected to the intermediate plate 75. The four corners of the intermediate plate 75 are connected to the lower stacking plate 73 by directional bolts 76. In this embodiment, the directional bolts 76 are plug bolts, with their bolt heads located above the intermediate plate 75. One end of their shoulder movably passes through the intermediate plate 75, and the other end is threaded to the lower stacking plate 73. A spring is sleeved between the intermediate plate 75 and the lower stacking plate 73 on the shoulder. A proximity switch 77 for detecting the bolt head of the directional bolts 76 is fixed on the intermediate plate 75.

[0050] During operation, the process of the lower stacking cylinder 72 driving the intermediate plate 75 to press down is preset to moderately compress a large packaging bag. If, due to an error, two large packaging bags appear on the support plate 81, after the lower stacking cylinder 72 pushes the intermediate plate 75 down according to the preset process, because the thickness of the two large packaging bags after compression is relatively large, the lower stacking plate 73 in contact with them will compress the spring upward. At this time, the shoulders of the four corner directional bolts 76 extend out of the intermediate plate 75, causing the bolt heads of the directional bolts 76 to move upward. Subsequently, the proximity switch 77 senses the bolt heads and immediately sends a signal to the controller. Upon receiving the signal, the controller immediately issues an alarm and controls the machine to stop. This alarm design can prevent the packaging bags from bursting and jamming the machine after the two large packaging bags are hard-compressed.

[0051] Furthermore, the first side-pressing mechanism 1, the first side-pushing mechanism 2, the second side-pressing mechanism 4, and the second side-pushing mechanism 5 each include a pushing cylinder and a pushing block, with the pushing block connected to the pushing end of the pushing cylinder, such as... Figures 2 to 5As shown, a cylinder shaft cover plate 60 is provided between the pushing block and the pushing end of the pushing cylinder; wherein, when the pushing cylinder of the second side pressing mechanism 4 pushes the pushing block to one side, the cylinder shaft cover plate 60 provided on the second side pressing mechanism 4 can form a receiving platform with the surrounding area to serve as a middle section for receiving large packaging bags; and the cylinder shaft cover plates 60 of each mechanism can all play a covering and protective role to prevent the packaging bags from getting stuck at the cylinder shaft during the stacking and feeding process.

[0052] Furthermore, such as Figure 5 As shown, the large material tray 10 has a relatively large space, which can easily lead to blind spots in sensing. Therefore, the first sensor 30 of the large material tray 10 is divided into an upper sensor 301 and a lower sensor 302. The upper sensor 301 and the lower sensor 302 are fixed at the upper and lower positions on the side wall of the large material tray 10, respectively, so as to detect from multiple directions and avoid blind spots in sensing.

[0053] Example 2

[0054] like Figure 8 As shown, the difference between this embodiment and Embodiment 1 lies in the structure of the elastic support mechanism 8. The elastic support mechanism 8 in this embodiment includes the aforementioned support plate 81, as well as a second fixed bracket 87, a movable mounting plate 86, a second support cylinder 88, and a second elastic shaft 89. The support plate 81 is slidably disposed at the front end of the second support cylinder 88, which is fixed to the movable mounting plate 86. A vertical slide rail is provided at one end of the second fixed bracket 87, and a vertical slider is provided on the same side of the movable mounting plate 86. The movable mounting plate 86 slides up and down on one end of the second fixed bracket 87 through the cooperation of the vertical slider and the vertical slide rail. The other end of the movable mounting plate 86 is connected to the second elastic shaft 89, and the other end of the second elastic shaft 89 movably passes through… A spring is provided between the movable mounting plate 86 and the second fixed bracket 87, with the second elastic shaft 89 inserted in the middle of the second fixed bracket 87. When the support plate 81 is located at the bottom of the feeding chamber 13 and the lower stacking mechanism 7 pushes the support plate 81 downward, the support plate 81 will drive the second support cylinder 88 to move downward. At this time, the vertical slider of the movable mounting plate 86 slides downward along the vertical slide rail of the second fixed bracket 87, while the other end of the movable mounting plate 86 will compress the spring of the second elastic shaft 89 downward. When the second support cylinder 88 retracts the support plate 81 and the support plate 81 loses the external force pushing downward, under the elastic action of the spring, the spring rebounds and drives the support plate 81 to return to the initial state. The elastic support mechanism 8 of this embodiment can realize automated stacking and feeding.

[0055] In summary, the first pressing mechanism 3, the first side pressing mechanism 1, the second pressing mechanism 6, and the second side pressing mechanism 4 automatically compress small and large packaging bags according to a preset process, ensuring that both bags achieve suitable thickness and width, reducing overall volume, and thus adapting their dimensions to the feeding specifications of the subsequent cartoning machine 101. Combined with the cooperation of the first sensor 30, the first side pushing mechanism 2, the second side pushing mechanism 5, the elastic support mechanism 8, the second sensor 40, the lower stacking mechanism 7, and the conveyor belt 20, automated stacking and feeding are achieved, improving cartoning efficiency, reducing production costs, and meeting the needs of large-volume cartoning. Furthermore, each feeding chamber 202 is an independent stacking space, ensuring precise alignment of the upper and lower bags and maintaining a fixed position during transport, avoiding mutual compression or misalignment, thus preventing incorrect or missing packaging.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A feeding device for packaging bags before boxing, characterized in that, It includes a first side pressing mechanism (1), a first side pushing mechanism (2), a first pressing mechanism (3), a second side pressing mechanism (4), a second side pushing mechanism (5), a second pressing mechanism (6), a lower stacking mechanism (7), an elastic support mechanism (8), a conveyor belt (20), and a small material tray (9) and a large material tray (10) located at the discharge ends of the small packaging machine (90) and the large packaging machine (100), respectively. The large material tray (10) and the small material tray (9) are located on the left and right sides of the conveyor belt (20), respectively, and the small material tray (9) is located behind the large material tray (10). The first pressing mechanism (3), the first side pressing mechanism (1) and the first side pushing mechanism (2) are located directly above, on the side and at the front end of the small material tray (9), respectively. The small material tray (9) has a first discharge port (91) at the rear end. The conveyor belt (20) is adjustablely and evenly distributed with feeding chambers (202), and each feeding chamber (202) is paired with the first discharge port (91). The second pressing mechanism (6), the second side pressing mechanism (4), and the second side pushing mechanism (5) are located directly above, to the side, and at the front end of the large material tray (10), respectively. The large material tray (10) has a second discharge port (11) at the rear end, and a discharge cavity (13) extends from the second discharge port (11). The discharge cavity (13) is located above the conveyor belt (20) and is paired with each feeding cavity (202). The elastic support mechanism (8) is located in the discharge cavity. (13) At the end away from the second discharge port (11), the elastic support mechanism (8) includes a support plate (81) that can be inserted and elastically moved up and down in the space formed by the discharge chamber (13) and the feed chamber (202). The lower stacking mechanism (7) is located directly above the discharge chamber (13) and can push down the support plate (81). The large tray (10) and the small tray (9) are each provided with a first sensor (30) for sensing whether there is a packaging bag in the tray.

2. The feeding device before boxing the packaging bag according to claim 1, characterized in that, The conveyor belt (20) is equipped with a second sensor (40) at the corresponding position in the feeding chamber (13).

3. The feeding device before boxing the packaging bag according to claim 1, characterized in that, A gate mechanism (92) is provided at the first discharge port (91). The gate mechanism (92) includes a gate driver (93) and a baffle (94). The gate driver (93) is driven to connect with the baffle (94). The baffle (94) is located outside the first discharge port (91) and matches the size of the first discharge port (91).

4. The feeding device before boxing the packaging bag according to claim 3, characterized in that, The conveyor belt (20) is provided with a lower limit mechanism (50) above the feed chamber (202) which is paired with the first discharge port (91) to prevent the packaging bag from exceeding the feed chamber (202). The lower limit mechanism (50) includes a lower limit cylinder (501) and a limiting plate (502). The limiting plate (502) is located at the pushing end of the lower limit cylinder (501), and the limiting plate (502) matches the space of the feed chamber (202).

5. The feeding device before boxing the packaging bag according to claim 1, characterized in that, The elastic support mechanism (8) further includes a first fixed bracket (82), a first support cylinder (83), and a push platform bracket (84). The first support cylinder (83) is fixed at one end of the first fixed bracket (82). The push end of the first support cylinder (83) is connected to the push platform bracket (84), and the push platform bracket (84) can slide left and right on the other end of the first fixed bracket (82). The support plate (81) is elastically and vertically movable on the push platform bracket (84) through a first elastic shaft (85).

6. The feeding device before boxing the packaging bag according to claim 5, characterized in that, The lower stacking mechanism (7) includes a lower stacking fixing plate (71), a lower stacking cylinder (72), and a lower stacking plate (73). The lower stacking cylinder (72) is fixed on the lower stacking fixing plate (71). The pushing end of the lower stacking cylinder (72) is connected to the lower stacking plate (73). The lower stacking plate (73) has a feeding pusher plate (74) extending downward at one end near the elastic support mechanism (8).

7. The feeding device before boxing the packaging bag according to claim 6, characterized in that, The lower stacking mechanism (7) also includes an intermediate plate (75) located between the lower stacking fixing plate (71) and the lower stacking plate (73). The pushing end of the lower stacking cylinder (72) is connected to the intermediate plate (75). The four corners of the intermediate plate (75) are connected to the lower stacking plate (73) by directional bolts (76). A spring is sleeved between the directional bolts (76) and the lower stacking plate (73). A proximity switch (77) for detecting the bolt head of the directional bolts (76) is fixed on the intermediate plate (75).

8. The feeding device before boxing the packaging bag according to claim 1, characterized in that, The first side pressing mechanism (1), the first side pushing mechanism (2), the second side pressing mechanism (4), and the second side pushing mechanism (5) all include a pushing cylinder and a pushing block. The pushing block is connected to the pushing end of the pushing cylinder, and a cylinder shaft cover plate (60) is provided between the pushing block and the pushing end of the pushing cylinder.

9. The feeding device before boxing the packaging bag according to claim 1, characterized in that, The first sensor (30) of the large material tray (10) includes an upper sensor (301) and a lower sensor (302), which are respectively fixed at the upper and lower positions of the side wall of the large material tray (10).

10. The feeding device before boxing the packaging bag according to claim 1, characterized in that, The elastic support mechanism (8) further includes a second fixed bracket (87), a movable mounting plate (86), a second support cylinder (88), and a second elastic shaft (89). The support plate (81) is slidably disposed at the front end of the second support cylinder (88). The second support cylinder (88) is fixed on the movable mounting plate (86). One end of the movable mounting plate (86) is movably disposed on one end of the second fixed bracket (87) through a slide rail. The other end of the movable mounting plate (86) is connected to the second elastic shaft (89) and is elastically connected to the second fixed bracket (87) through the other end of the second elastic shaft (89).

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