Automatic strapping device for carton packaging

Abstract

The utility model provides automatic binding device of packing carton relates to hydraulic packing machine technical field, the utility model discloses a packing machine frame, the packing machine frame is the frame structure of inside hollow, the top end surface fixed mounting of packing machine frame has hydraulic drive assembly, the output of hydraulic drive assembly vertically extends to packing machine frame inside down, and the output is fixedly connected with the material extruding disc that can lift along the vertical direction, the side of packing machine frame close to hydraulic drive assembly side, along the horizontal direction slidably set up the packing cavity door for closing the inside cavity of frame, the inside wall of packing machine frame and be located material extruding disc just below, be provided with the cleaning device for cleaning material extruding disc bottom, and cleaning device passes through extruding disc cleaning scraper and slides along extruding disc bottom level, can force scraping off residual chippings.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic baling machine technology, and in particular to an automatic bundling device for packaging cartons. Background Technology

[0002] In the packaging industry, logistics warehousing, and waste recycling, cardboard boxes are commonly used for product packaging and transportation, resulting in a large number of discarded or uncollectible loose cardboard boxes after use. These loose cardboard boxes are bulky and take up a lot of space. If they are directly stacked or transported, it will not only waste storage space but also increase transportation costs (such as reducing the amount transported per trip and increasing the frequency of transport). Therefore, they need to be compressed into smaller, more regular block structures through packaging to improve storage utilization and transportation efficiency, and to provide a foundation for subsequent bundling, storage, and resource recycling.

[0003] Currently, hydraulic balers are widely used in the industry for compressing and baling cardboard boxes. Existing hydraulic balers typically include core components such as a baler frame, hydraulic drive assembly, material compression disc, and baling chamber door. The general workflow is as follows: the operator places the loose cardboard boxes to be compressed into the compression space inside the baler frame, manually closes and locks the baling chamber door, and then starts the hydraulic drive assembly. The output shaft of the hydraulic drive assembly drives the material compression disc to move vertically downwards, applying pressure to the cardboard boxes inside the frame, compressing the loose cardboard boxes into a block structure of a preset volume. After compression is complete, the baling chamber door is unlocked, the compressed cardboard blocks are removed, and subsequent bundling is performed.

[0004] However, in practical applications, existing hydraulic balers have obvious technical pain points in the compression of packaging cartons: since the packaging cartons are mostly made of paper, during the process of the material extrusion disc applying pressure to the cartons, scraps, paper dust and other debris are easily generated on the surface of the cartons, and some of the debris will stick together or adhere to the bottom of the material extrusion disc due to the extrusion force. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an automatic packaging carton bundling device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic packaging carton bundling device, including a packing machine frame, wherein the packing machine frame is a hollow frame structure, a hydraulic drive component is fixedly installed on the top end face of the packing machine frame, the output end of the hydraulic drive component extends vertically downward into the interior of the packing machine frame, and the output end is fixedly connected to a material extrusion plate that can be raised and lowered in the vertical direction; a packing cavity door for closing the internal cavity of the frame is slidably provided in the horizontal direction on the side of the packing machine frame near the hydraulic drive component; a cleaning device for cleaning the bottom of the material extrusion plate is provided on the inner side wall of the packing machine frame and directly below the material extrusion plate;

[0007] The cleaning device includes a scraper sliding frame and a squeezing disc cleaning scraper. The scraper sliding frame is fixedly connected to the inner wall of the baling machine frame in the horizontal direction. The inner wall of the scraper sliding frame has a sliding groove extending along its length. One end of the squeezing disc cleaning scraper is slidably embedded in the sliding groove. The inner wall of the baling machine frame has a scraper sliding connecting groove extending in the horizontal direction corresponding to the sliding path of the squeezing disc cleaning scraper. The other end of the squeezing disc cleaning scraper is slidably embedded in the inner wall of the scraper sliding connecting groove.

[0008] Preferably, the side of the packing chamber door closest to the packing machine frame is provided with an opening device for automatically opening the packing chamber door; the opening device includes an opening return spring and a door telescopic support rod, the door telescopic support rod extends radially along the horizontal direction of the packing machine frame, one end of which is fixedly connected to the outer wall of the packing machine frame, and the other end is fixedly connected to the side of the packing chamber door; the opening return spring is sleeved on the outer periphery of the door telescopic support rod, and one end of the opening return spring is fixedly connected to the outer wall of the packing machine frame, and the other end is fixedly connected to the side of the packing chamber door; the opening return spring is always in a pre-compressed state, and when the locking state of the packing chamber door is released, it can push the packing chamber door to slide away from the packing machine frame along the extension direction of the door telescopic support rod.

[0009] Preferably, a door locking L-shaped block is vertically fixed at the edge of the packing chamber door near the side of the packing machine frame. The free end of the door locking L-shaped block has a locking strip receiving groove for accommodating the locking components along the closing direction of the packing chamber door. At the position of the door locking L-shaped block on the packing machine frame, a door locking strip is slidably provided in a horizontal direction perpendicular to the sliding direction of the packing chamber door. The end of the door locking strip near the closing path of the packing chamber door has a locking strip guide slope inclined towards the packing chamber door. When the packing chamber door is closed, the door locking L-shaped block can squeeze the locking strip guide slope and push the door locking strip to avoid obstruction.

[0010] Preferably, a locking strip sliding seat is fixedly protruding on the outer wall of the packaging machine frame at the position corresponding to the door locking strip. The locking strip sliding seat has a sliding cavity extending along the sliding direction of the door locking strip, and the door locking strip is slidably embedded in the sliding cavity. A locking strip return spring is fixedly connected to one end of the sliding cavity away from the packaging cavity door along the extension direction of the sliding cavity. The other end of the locking strip return spring is fixedly connected to the end of the door locking strip. When the locking strip receiving groove is aligned with the door locking strip, the locking strip return spring can push the door locking strip to slide into the locking strip receiving groove, thereby locking the packaging cavity door.

[0011] Preferably, the top of the locking strip sliding seat has a pressing block sliding groove communicating with the sliding cavity along a vertical direction perpendicular to the sliding direction of the door locking strip. A manual pressing button is slidably embedded in the inner wall of the pressing block sliding groove along the vertical direction. A locking strip traction rope is fixedly connected to the bottom of the manual pressing button. The locking strip traction rope extends along the groove wall of the pressing block sliding groove and slides through the side wall of the locking strip sliding seat before being fixedly connected to the end of the door locking strip away from the locking strip return spring. When the manual pressing button is pressed down, the locking strip traction rope can pull the door locking strip along the sliding cavity in a direction away from the locking strip receiving groove, thereby releasing the locking of the packing cavity door.

[0012] Preferably, at the end of the extrusion disc cleaning scraper away from the inner wall of the packaging machine frame, a scraper drive plate extending horizontally to the outside of the scraper sliding frame is vertically fixed, and the scraper drive plate is used to drive the extrusion disc cleaning scraper to slide synchronously.

[0013] Preferably, a scraper drive motor is fixedly installed on the end face of the scraper sliding frame away from the baler frame. The output shaft of the scraper drive motor is horizontally arranged along the extension direction of the scraper sliding frame, and a scraper drive screw is fixedly connected to the output shaft. The end of the scraper drive screw away from the scraper drive motor is rotatably connected to the end of the scraper sliding frame near the baler frame through a bearing, and the scraper drive screw is threaded through and inserted into one side of the scraper drive plate. When the scraper drive motor is started, the scraper drive screw can drive the scraper drive plate to drive the extrusion disc cleaning scraper to slide horizontally along the extension direction of the scraper sliding frame and the scraper sliding connecting groove.

[0014] In this invention, the cleaning device uses a cleaning scraper that slides horizontally along the bottom of the extrusion disc to forcibly remove residual debris (the scraper length is adapted to the width of the extrusion disc, and the micro-gap design achieves cleaning without dead angles). This ensures that the bottom of the extrusion disc remains flat during each extrusion, allowing the subsequent compression of the carton to form a uniform and dense block structure. This provides a regular material base for subsequent bundling operations and prevents the bundling from becoming loose or falling off due to irregular shapes of the carton blocks. Attached Figure Description

[0015] Figure 1 This utility model presents a three-dimensional structural diagram of an automatic bundling device for packaging cartons.

[0016] Figure 2 A three-dimensional structural diagram of the novel L-shaped plate proposed in this utility model is provided.

[0017] Figure 3 This is a three-dimensional structural diagram of the novel extrusion block proposed in this utility model.

[0018] Figure 4 A three-dimensional structural diagram of the novel scraper proposed in this utility model is provided.

[0019] Legend: 1. Packing machine frame; 2. Hydraulic drive assembly; 3. Material extrusion disc; 4. Packing chamber door; 5. Door opening return spring; 6. Door telescopic support rod; 7. Door locking L-shaped block; 8. Locking strip receiving groove; 9. Locking strip sliding seat; 10. Door locking strip; 11. Locking strip guide slope; 12. Locking strip return spring; 13. Extrusion block sliding groove; 14. Manual extrusion button; 15. Locking strip traction rope; 16. Scraper sliding frame; 17. Extrusion disc cleaning scraper; 18. Scraper drive plate; 19. Scraper drive motor; 20. Scraper transmission screw; 21. Scraper sliding connection groove. Detailed Implementation

[0020] Example 1, such as Figure 1-4 As shown, the automatic packaging carton bundling device uses the packaging machine frame 1 as the core load-bearing structure. The packaging machine frame 1 is designed as a hollow frame structure, and its internal cavity forms a compression space to accommodate the packaging carton to be packaged. During the packaging process, the loose packaging cartons to be compressed can be directly stacked at the bottom of the internal cavity of the packaging machine frame 1.

[0021] The hydraulic drive assembly 2 is bolted to the top end face of the baling machine frame 1, and its output shaft extends vertically downward through the top wall of the baling machine frame 1, reaching directly above the internal cavity of the baling machine frame 1. The end of the output shaft is coaxially fixedly connected to the material extrusion plate 3 through a flange. When the hydraulic drive assembly 2 is started, the material extrusion plate 3 can move up and down vertically, thereby applying extrusion force to the packaging cartons inside the baling machine frame 1, compressing the loose cartons into a regular block structure, which is convenient for subsequent bundling. The packing chamber door 4 is located on the side of the packing machine frame 1 near the hydraulic drive assembly 2, and its overall dimensions are adapted to the size of the side opening of the packing machine frame 1. The packing chamber door 4 is slidably connected to the outer wall of the packing machine frame 1 via a sliding guide rail at the bottom (not shown in the attached diagram, which is a conventional sliding fit structure). It can move closer to or further away from the packing machine frame 1 in the horizontal direction, realizing the opening and closing of the internal compression space of the packing machine frame 1. When open, it is used to put in the packaging carton to be packed or to take out the compressed carton blocks. When closed, it works with the material extrusion plate 3 to form a sealed compression environment to prevent carton fragments from flying during the extrusion process. The cleaning device is installed on the inner wall of the packing machine frame 1, and is located directly below the material extrusion plate 3. Its installation height maintains a preset distance from the bottom of the internal cavity of the packing machine frame 1 (this distance does not affect the stacking and extrusion of the packaging cartons). It is used to clean the carton fragments (such as carton scraps, paper scraps, etc.) remaining at the bottom of the material extrusion plate 3 after each extrusion operation to prevent residual fragments from affecting the uniformity of subsequent extrusions.

[0022] The door opening device, as the core mechanism for automatically opening the packing chamber door 4, is assembled between the packing chamber door 4 and the packing machine frame 1 along the horizontal radial direction. Specifically, it includes a door opening return spring 5 and a door telescopic support rod 6 on the outer side wall of the packing machine frame 1, with the other end welded and fixed to the inner side wall of the packing chamber door 4 (the side closer to the packing machine frame 1), and the whole extends in the horizontal direction. The door opening return spring 5 is sleeved on the outer periphery of the door telescopic support rod 6, and the two ends of the spring are welded and fixed to the outer side wall of the packing machine frame 1 and the inner side wall of the packing chamber door 4, respectively. When the packing chamber door 4 is in the closed and locked state, the door opening return spring 5 is always in the pre-compressed state, storing elastic potential energy for pushing the door to open.

[0023] When the locking state of the packing chamber door 4 is released, the pre-compression potential energy of the door opening reset spring 5 is released, pushing the packing chamber door 4 away from the packing machine frame 1 along the extension direction of the door telescopic support rod 6; at this time, the door telescopic support rod 6 extends synchronously with the sliding of the door (in a damped telescopic manner to avoid the door opening speed being too fast and causing impact), and finally drives the packing chamber door 4 to slide horizontally to the preset opening position. The operator can directly put the packaging carton to be packed into the packing machine frame 1, or take out the compressed carton block.

[0024] To ensure the sealing stability of the packaging chamber door 4 during the extrusion process, this device is equipped with a locking mechanism that cooperates with the door opening device, including a door locking L-shaped block 7, a door locking strip 10, a locking strip sliding seat 9, a locking strip return spring 12, and a manual extrusion button 14. Its working process is divided into two stages: "locking" and "unlocking".

[0025] The operator manually pushes the packaging chamber door 4 to slide horizontally towards the side closer to the packaging machine frame 1. At this time, the door locking L-shaped block 7, fixed to the inner edge of the packaging chamber door 4, moves synchronously with the door, and its free end gradually approaches the locking strip sliding seat 9 on the outer wall of the packaging machine frame 1. The free end of the door locking L-shaped block 7 first contacts the locking strip guide slope 11 at the end of the door locking strip 10. Since the locking strip guide slope 11 is inclined towards the closing direction of the packaging chamber door 4, when the door continues to be pushed, the door locking L-shaped block 7 generates a pressing force on the locking strip guide slope 11 along the tangential direction of the slope. This pressing force is decomposed into a component force perpendicular to the sliding direction of the door locking strip 10, pushing the door locking strip 10 to slide away from the packaging chamber door 4 along the sliding cavity inside the locking strip sliding seat 9, while compressing the locking strip return spring 12 (the spring stores elastic potential energy). When the packing chamber door 4 is fully closed (fitting against the side of the packing machine frame 1), the locking strip receiving groove 8 on the door locking L-shaped block 7 is exactly aligned with the end of the door locking strip 10. At this time, the elastic potential energy of the locking strip return spring 12 is released, pushing the door locking strip 10 to slide along the sliding cavity towards the packing chamber door 4, and finally the end of the door locking strip 10 is embedded in the inner wall of the locking strip receiving groove 8, realizing the mechanical locking of the packing chamber door 4. At this time, the door opening return spring 5 of the door opening device remains in a pre-compressed state, but cannot push the door to open.

[0026] After the carton compression operation is completed, the operator presses the manual compression button 14 vertically downwards. This button is slidably embedded in the compression block sliding groove 13 at the top of the locking strip sliding seat 9, and slides downwards along the vertical direction of the sliding groove when pressed. A locking strip traction rope 15 (made of high-strength nylon rope to avoid breakage due to stretching) is fixedly connected to the bottom of the manual compression button 14. This traction rope extends along the groove wall of the compression block sliding groove 13 and slides through the side wall of the locking strip sliding seat 9 before being fixedly connected to the end of the door locking strip 10 away from the locking strip return spring 12. When the button slides downwards, the traction rope is pulled synchronously, thereby driving the door locking strip 10 to slide along the sliding cavity away from the locking strip receiving groove 8 until the door locking strip 10 is completely disengaged from the locking strip receiving groove 8, and the locking state of the packing cavity door 4 is released. After the locking is released, the opening return spring 5 of the opening device immediately pushes the packing cavity door 4 to open automatically, completing the unlocking-opening linkage action.

[0027] To address the issue of debris residue remaining at the bottom of the material extrusion disc 3 after packaging cartons are squeezed, a cleaning device achieves automatic cleaning through mechanical transmission. Its core components include a scraper sliding frame 16, an extrusion disc cleaning scraper 17, a scraper drive plate 18, a scraper drive motor 19, and a scraper drive screw 20. The specific working process is as follows: The scraper sliding frame 16 adopts a rectangular frame structure and is bolted to the inner wall of the packaging machine frame 1. Its extension direction is consistent with the width direction of the material extrusion disc 3. The inner wall of the scraper sliding frame 16 has openings extending along the length direction... The sliding groove of the extrusion plate cleaning scraper 17 is slidably embedded in one end, while the other end is slidably embedded in the scraper sliding connection groove 21 on the inner side wall of the packaging machine frame 1 (the scraper sliding connection groove 21 is parallel to the sliding groove and together defines the sliding trajectory of the extrusion plate cleaning scraper 17); the top end face of the extrusion plate cleaning scraper 17 maintains a small gap with the bottom end face of the material extrusion plate 3 (to avoid damage to the scraper during extrusion and to not affect the cleaning effect); the length of the extrusion plate cleaning scraper 17 is adapted to the width of the material extrusion plate 3 to ensure that there are no dead corners in the cleaning. A scraper drive plate 18 is vertically welded to one end of the extrusion plate cleaning scraper 17 away from the baler frame 1. The scraper drive plate 18 extends to the outside of the scraper sliding frame 16, and a threaded hole adapted to the scraper drive screw 20 is opened on one side. The scraper drive motor 19 is fixed to the end face of the scraper sliding frame 16 away from the baler frame 1 by a motor base. Its output shaft is set horizontally along the length of the scraper sliding frame 16, and the end of the output shaft is fixedly connected to one end of the scraper drive screw 20 by a coupling. The other end of the scraper drive screw 20 is rotatably connected to the end of the scraper sliding frame 16 near the baler frame 1 by a deep groove ball bearing, and the scraper drive screw 20 is threaded through the threaded hole of the scraper drive plate 18 to form a screw-nut transmission pair. When the material extrusion disc 3 completes the extrusion and rises to the preset height (higher than the top of the extrusion disc cleaning scraper 17), the scraper drive motor 19 starts, and its output shaft drives the scraper transmission screw 20 to rotate around its own axis. Since the scraper drive plate 18 is threadedly engaged with the scraper transmission screw 20, and the scraper drive plate 18 is restricted from rotating along with the extrusion disc cleaning scraper 17 by the sliding groove and the scraper sliding connection groove 21, the rotation of the scraper transmission screw 20 is converted into the horizontal linear movement of the scraper drive plate 18 along the length direction of the scraper transmission screw 20. The scraper drive plate 18 drives the extrusion plate cleaning scraper 17 to slide synchronously along the sliding groove of the scraper sliding frame 16 and the scraper sliding connection groove 21. The top end face of the extrusion plate cleaning scraper 17 is in close contact with the bottom end face of the material extrusion plate 3 (due to the small gap, the debris is forcibly scraped off), and scrapes the cardboard debris remaining at the bottom of the material extrusion plate 3 to the bottom of the internal cavity of the packaging machine frame 1 (the debris is taken out together with the compressed cardboard block); after cleaning is completed, the scraper drive motor 19 reverses and drives the extrusion plate cleaning scraper 17 back to the initial position, waiting for the next cleaning instruction.

[0028] Working Principle: The packing chamber door 4 is in the automatic open state, the squeezing plate and cleaning scraper 17 of the cleaning device are in the initial position, and the material squeezing plate 3 is at the highest position on the top of the packing machine frame 1. The operator stacks the loose packaging cartons to be packed in the compression space inside the packing machine frame 1, ensuring that the cartons are not stacked beyond the cavity range of the packing machine frame 1. The operator manually pushes the packing chamber door 4 to close, the door locking L-shaped block 7 squeezes the locking strip guide slope 11, and the door locking strip 10 automatically embeds into the locking strip receiving groove 8, locking the packing chamber door 4 in place. The operator starts the hydraulic drive component 2, whose output shaft drives the material squeezing plate 3 to move vertically downward, applying squeezing pressure to the packaging cartons inside the packing machine frame 1 until the cartons are compressed into a block structure of a preset volume. The hydraulic drive component 2 stops working, and the material squeezing plate 3 rises to the cleaning position. Pressing the manual squeezing button 14 pulls the door locking strip 10 out of the locking strip receiving groove 8 through the locking strip traction rope 15, and the door opening reset spring 5 pushes the packing chamber door 4 to open automatically. The operator removes the compressed cardboard box from the inside of the packing machine frame 1 and starts the cleaning device at the same time. The scraper drive motor 19 drives the extrusion plate cleaning scraper 17 to slide and clean the debris at the bottom of the material extrusion plate 3. After cleaning, the device returns to the initial state and waits for the next round of packing operations.

Claims

1. An automatic packaging carton bundling device, comprising a packing machine frame (1), characterized in that: The baling machine frame (1) is a hollow frame structure. A hydraulic drive assembly (2) is fixedly installed on the top end face of the baling machine frame (1). The output end of the hydraulic drive assembly (2) extends vertically downward into the interior of the baling machine frame (1), and the output end is fixedly connected to a material extrusion plate (3) that can be raised and lowered in the vertical direction. On the side of the baling machine frame (1) near the hydraulic drive assembly (2), a slidable baling chamber door (4) for closing the internal cavity of the frame is provided in the horizontal direction. A cleaning device for cleaning the bottom of the material extrusion plate (3) is provided on the inner wall of the baling machine frame (1) and directly below the material extrusion plate (3). The cleaning device includes a scraper sliding frame (16) and a squeezing disc cleaning scraper (17). The scraper sliding frame (16) is fixedly connected to the inner wall of the packing machine frame (1) in the horizontal direction. The inner wall of the scraper sliding frame (16) is provided with a sliding groove extending along its length direction. One end of the squeezing disc cleaning scraper (17) is slidably embedded in the sliding groove. The inner wall of the packing machine frame (1) is provided with a scraper sliding connection groove (21) extending in the horizontal direction corresponding to the sliding path of the squeezing disc cleaning scraper (17). The other end of the squeezing disc cleaning scraper (17) is slidably embedded in the inner wall of the scraper sliding connection groove (21).

2. The automatic packaging carton bundling device according to claim 1, characterized in that: The side of the packing chamber door (4) near the packing machine frame (1) is provided with an opening device for automatically opening the packing chamber door (4); the opening device includes an opening reset spring (5) and a door telescopic support rod (6). The door telescopic support rod (6) extends radially along the packing machine frame (1), with one end fixedly connected to the outer wall of the packing machine frame (1) and the other end fixedly connected to the side of the packing chamber door (4); the opening reset spring (5) is sleeved on the outer periphery of the door telescopic support rod (6), with one end fixedly connected to the outer wall of the packing machine frame (1) and the other end fixedly connected to the side of the packing chamber door (4). The opening reset spring (5) is always in a pre-compressed state. When the locking state of the packing chamber door (4) is released, it can push the packing chamber door (4) to slide away from the packing machine frame (1) along the extension direction of the door telescopic support rod (6).

3. The automatic packaging carton bundling device according to claim 1, characterized in that: The packing chamber door (4) is vertically fixed with a door locking L-shaped block (7) on the edge of the side of the packing machine frame (1). The free end of the door locking L-shaped block (7) is provided with a locking strip receiving groove (8) for accommodating the locking component along the closing direction of the packing chamber door (4). At the position of the door locking L-shaped block (7) on the packing machine frame (1), a door locking strip (10) is slidably provided in the horizontal direction perpendicular to the sliding direction of the packing chamber door (4). The door locking strip (10) is provided with a locking strip guide slope (11) inclined towards the side of the packing chamber door (4) at one end of the closing path of the packing chamber door (4). When the packing chamber door (4) is closed, the door locking L-shaped block (7) can squeeze the locking strip guide slope (11) and push the door locking strip (10) to avoid it.

4. The automatic packaging carton bundling device according to claim 3, characterized in that: On the outer wall of the packaging machine frame (1), a locking strip sliding seat (9) is fixedly protruding at the position corresponding to the door locking strip (10). The locking strip sliding seat (9) has a sliding cavity extending along the sliding direction of the door locking strip (10). The door locking strip (10) is slidably embedded in the sliding cavity. At one end of the sliding cavity away from the packaging cavity door (4), a locking strip return spring (12) is fixedly connected along the extension direction of the sliding cavity. The other end of the locking strip return spring (12) is fixedly connected to the end of the door locking strip (10). When the locking strip receiving groove (8) is aligned with the door locking strip (10), the locking strip return spring (12) can push the door locking strip (10) to slide into the locking strip receiving groove (8) to lock the packaging cavity door (4).

5. The automatic packaging carton bundling device according to claim 4, characterized in that: At the top of the locking strip sliding seat (9), a pressing block sliding groove (13) communicating with the sliding cavity is provided in the vertical direction perpendicular to the sliding direction of the door locking strip (10). A manual pressing button (14) is slidably embedded in the inner wall of the pressing block sliding groove (13) in the vertical direction. A locking strip traction rope (15) is fixedly connected to the bottom of the manual pressing button (14). The locking strip traction rope (15) extends along the groove wall of the pressing block sliding groove (13) and slides through the side wall of the locking strip sliding seat (9), and is fixedly connected to the end of the door locking strip (10) away from the locking strip return spring (12). When the manual pressing button (14) is pressed down, the door locking strip (10) can be pulled along the sliding cavity in the direction away from the locking strip receiving groove (8) by the locking strip traction rope (15), thereby releasing the locking of the packing cavity door (4).

6. The automatic packaging carton bundling device according to claim 5, characterized in that: The end of the extrusion plate cleaning scraper (17) away from the inner wall of the packaging machine frame (1) is vertically fixed with a scraper drive plate (18) that extends horizontally to the outside of the scraper sliding frame (16). The scraper drive plate (18) is used to drive the extrusion plate cleaning scraper (17) to slide synchronously.

7. The automatic packaging carton bundling device according to claim 6, characterized in that: A scraper drive motor (19) is fixedly installed on one end face of the scraper sliding frame (16) away from the baler frame (1). The output shaft of the scraper drive motor (19) is horizontally arranged along the extension direction of the scraper sliding frame (16), and the output shaft is fixedly connected to a scraper drive screw (20). The end of the scraper drive screw (20) away from the scraper drive motor (19) is rotatably connected to the end of the scraper sliding frame (16) near the baler frame (1) through a bearing, and the scraper drive screw (20) is threaded through and inserted into one side of the scraper drive plate (18). When the scraper drive motor (19) is started, the scraper drive screw (20) can drive the scraper drive plate (18) to drive the extrusion plate cleaning scraper (17) to slide horizontally along the extension direction of the scraper sliding frame (16) and the scraper sliding connecting groove (21).

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