An automatic feeding mechanism for a bag cutting machine

Abstract

This application relates to the field of feeding equipment technology and discloses an automatic feeding mechanism for a bag-cutting machine, including a material placement platform, a material transfer mechanism, a vision inspection mechanism, a PLC control cabinet, a material feeding mechanism, and a bag-cutting machine. The material feeding mechanism includes a base plate, and a support frame is provided above the base plate. This automatic feeding mechanism for a bag-cutting machine uses a limiting frame structure driven by a bidirectional threaded rod, combined with a gradually expanding inclined bottom design, to form a dynamic guiding channel. It automatically adjusts the distance between the two side frames to adapt to bags of different widths. With the help of the conveyor belt, the bag is naturally centered, effectively solving the problem of inaccurate material dropping caused by inertia or positional deviation, ensuring that the bag accurately falls into the bag-cutting machine inlet. The rotating ball bearings set on the inner wall of the limiting frame convert sliding friction into rolling friction, significantly reducing the contact resistance between the bag and the frame, reducing the bag conveying jamming rate, and maintaining smooth guidance even under high-speed or high-load conditions, ensuring continuous and stable operation of the production line.

Description

Technical Field

[0001] This application relates to the field of feeding equipment technology, specifically an automatic feeding mechanism for a bag cutting machine. Background Technology

[0002] Packaging unpacking machines are mainly used for unpacking various bagged products. Previously, semi-automatic packaging unpacking machines were mainly used, which required personnel to control the unpacking and unloading processes. This required cooperation between personnel to complete the operation, resulting in problems such as high labor intensity, low efficiency, and potential for human injury and environmental pollution.

[0003] An existing patent (publication number: CN210527055U) discloses a single-piece small-scale unpacking machine, including a frame divided into three sections: front, middle, and rear. A conveyor belt is fixedly installed in the front section, a waste bag collection device is installed in the rear section, and a material collection device is located at the bottom of the frame, a bag-tapping device is located above the material collection device, and a single-piece bag-cutting device is located diagonally above the bag-tapping device and close to the conveyor belt in the middle section. A bag-gripping device that moves back and forth along the frame is installed on the upper surface of the frame, and the input end of the conveyor belt is located at the front end of the frame. This invention solves the problem of material contamination that easily occurs in unpacking machines by using a single-piece bag-cutting device and a bag-tapping device to achieve single-port material separation, thus solving the problem of packaging bag debris generated during cutting.

[0004] The above-mentioned method of conveying material bags via conveyor belts lacks effective guiding devices. During the conveying process, material bags of different sizes are prone to inaccurate dropping due to inertia or positional deviation. Lateral deviation will damage the bag-cutting accuracy of the bag cutter, causing material leakage or packaging bag residue, which will affect the efficiency of subsequent waste bag collection. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides an automatic feeding mechanism for a bagging machine, which has the advantages of accurate conveying and strong applicability, and solves the problems mentioned in the background technology.

[0006] To achieve the above objectives, this application provides the following technical solution: an automatic feeding mechanism for a bag-cutting machine, comprising a material placement platform, a material transfer mechanism, a vision inspection mechanism, a PLC control cabinet, a material feeding mechanism, and a bag-cutting machine. The material feeding mechanism includes a base plate, a support frame is provided above the base plate, a hydraulic rod is fixedly connected to the upper surface of the base plate, the output end of the hydraulic rod is fixedly connected to the bottom end of the support frame, a frame is provided above the support frame, transmission rollers are rotatably connected between the front and rear inner sidewalls of the left and right ends of the frame, a conveyor belt is provided between the two transmission rollers, and the two transmission rollers are connected by transmission through the conveyor belt. Two limiting frames are slidably connected to the outer surface of the conveyor belt, and the bottom ends of the two limiting frames are inclined away from the conveyor belt.

[0007] An adjustment frame is provided below the frame. The front and rear ends of the adjustment frame are fixedly connected to the front and back of the frame. A bidirectional threaded rod is provided between the adjustment frames. The bottom ends of the two limiting frames are respectively threaded to the two ends of the bidirectional threaded rod.

[0008] An angle unit for adjusting the tilt angle of the conveyor belt is provided between the top of the adjusting frame and the support frame.

[0009] Furthermore, each of the two limiting frames has a set of equally spaced ball bearings rotatably connected to the side of each other that is close to the other.

[0010] The above solution reduces the frictional resistance between the material bag and the limiting frame. The rotating ball bearings roll when the material bag contacts, converting sliding friction into rolling friction, which maintains smooth guidance and avoids material bag jamming due to excessive friction.

[0011] Furthermore, the angle unit includes an angle frame, the middle end of which is fixedly connected to the bottom of the adjustment frame. An electric push rod is provided below the left end of the angle frame. The output end of the electric push rod is hinged to the left end of the angle frame, the bottom end of the electric push rod is hinged to the top left side of the support frame, and the other end of the angle frame is hinged to the top right side of the support frame.

[0012] Through the above scheme, the electric actuator extends and retracts, causing the angle frame to rotate around the hinge point, thereby adjusting the angle between the frame and the support frame, making the angle of one end of the conveyor belt adjustable to meet the feed inlet height requirements of different models of bag cutting machines. At the same time, in conjunction with the hydraulic rod lifting function, the overall applicability is improved.

[0013] Furthermore, the material transfer mechanism includes a base, a robotic arm body is mounted on the top of the base, and the material placement platform is located on both sides of the base.

[0014] Using the above method, the mechanical wall can automatically grab the palletized packages and place them at the bottom of the conveyor belt.

[0015] Furthermore, the visual inspection mechanism includes a support rod, which is L-shaped. A motor is installed at the top of the support rod, and the output end of the motor is fixedly connected to a rotating shaft via a coupling. A swing arm is fixedly connected to the top of the rotating shaft, and an industrial camera module is installed at the other end of the swing arm. The rotating shaft is coaxially arranged with the base.

[0016] Through the above solution, the industrial camera module can move in a circular motion with the swing arm, expanding the detection range. The motor drives the rotating shaft to rotate, enabling the industrial camera to image the material package from multiple angles. Combined with image recognition algorithms, the position, size, and orientation information of the material package can be obtained in real time.

[0017] Furthermore, guardrails are installed on the sides of the two material placement platforms that are far apart from each other.

[0018] The above solutions also standardize the material packing area, prevent personnel from entering the work area, and ensure the continuous and stable operation of the automated production line.

[0019] Furthermore, the PLC control cabinet is mounted on the surface of one of the guardrails.

[0020] With the above solution, the PLC control cabinet is the core of the automated control system. It is used to integrate and process visual detection signals, robotic arm path planning, conveyor belt speed adjustment and angle adjustment commands. Through preset programs, it coordinates the coordinated actions of various actuators (such as hydraulic rods, electric actuators, and motors) to achieve fully unmanned operation from palletized bag grabbing, visual positioning, conveying adjustment to bag cutting and feeding.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] This automatic feeding mechanism for a bag cutter uses a limit frame structure driven by a bidirectional threaded rod, combined with a gradually expanding inclined bottom design, to form a dynamic guide channel. It automatically adjusts the spacing between the two side frames to accommodate bags of different widths, and with the power of the conveyor belt, the bag is naturally centered. This effectively solves the problem of inaccurate material dropping caused by inertia or positional deviation, ensuring that the bag falls accurately into the bag cutter's feed inlet.

[0023] The rotating balls installed on the inner wall of the limiting frame convert sliding friction into rolling friction, which significantly reduces the contact resistance between the material bag and the frame, reduces the jamming rate of the material bag conveyor, and can maintain smooth guidance under high-speed or high-load conditions, ensuring the continuous and stable operation of the production line.

[0024] The integrated hydraulic rod lifting and electric push rod angle unit enables free adjustment of the conveyor belt height and tilt angle, and can be adapted to the feed inlets of different models of bag cutting machines;

[0025] The industrial camera module achieves 360° detection through a swing arm. Combined with the image recognition algorithm of the PLC control cabinet, it acquires the position, size and posture data of the material bag in real time, forming a closed-loop control with the robotic arm and conveyor belt. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application;

[0027] Figure 2 This is a schematic diagram of the material feeding mechanism for this application. Figure 1 ;

[0028] Figure 3 This is a schematic diagram of the material feeding mechanism for this application. Figure 2 ;

[0029] Figure 4 This is a diagram of the limiting border structure of this application;

[0030] Figure 5 This is a schematic diagram of the visual inspection agency used in this application.

[0031] In the picture:

[0032] 1. Material placement platform;

[0033] 2. Material transfer mechanism; 201. Base; 202. Robotic arm body;

[0034] 3. Visual inspection mechanism; 301. Support rod; 302. Motor; 303. Rotating shaft; 304. Swing arm; 305. Industrial camera module;

[0035] 4. PLC control cabinet;

[0036] 5. Material feeding mechanism; 501. Base plate; 502. Support frame; 503. Hydraulic rod; 504. Frame; 505. Drive roller; 506. Conveyor belt; 507. Limiting frame; 508. Adjusting frame; 509. Bidirectional threaded rod; 510. Ball bearings;

[0037] 6. Bag-cutting machine;

[0038] 7. Angle unit; 701. Angle bracket; 702. Electric actuator;

[0039] 8. Guardrails. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Please see Figures 1-5This embodiment of an automatic feeding mechanism for a bag-cutting machine includes a material placement platform 1, a material transfer mechanism 2, a vision inspection mechanism 3, a PLC control cabinet 4, a material feeding mechanism 5, and a bag-cutting machine 6. The material feeding mechanism 5 includes a base plate 501, a support frame 502 above the base plate 501, a hydraulic rod 503 fixedly connected to the upper surface of the base plate 501, and the output end of the hydraulic rod 503 fixedly connected to the bottom end of the support frame 502. A frame 504 is provided above the support frame 502, and transmission rollers 505 are rotatably connected between the front and rear inner sidewalls of the left and right ends of the frame 504. One end of one of the transmission rollers is fixedly connected to the output end of an external power source, and a connection is provided between the two transmission rollers 505. There is a conveyor belt 506, and two drive rollers 505 are connected by the conveyor belt 506. Two limiting frames 507 are slidably connected to the outer surface of the conveyor belt 506. The bottom ends of the two limiting frames 507 are inclined away from the conveyor belt 506. By setting the bottom ends of the limiting frames 507 away from the conveyor belt 506, the purpose of guiding the material bag can be achieved, ensuring that the material bag falls accurately into the inlet of the bag cutter 6. Specifically, when the material bag is placed at the end, the inclined bottom structure forms a gradually expanding channel, which, together with the power of the conveyor belt 506, makes the material bag naturally center, avoiding the problem of inaccurate material falling due to inertia or positional deviation, thus reducing the bag breaking effect of the bag cutter 6.

[0042] An adjusting frame 508 is installed below the frame 504. The front and rear ends of the adjusting frame 508 are fixedly connected to the front and back of the frame 504. A bidirectional threaded rod 509 is installed between the adjusting frames 508. One end of the bidirectional threaded rod 509 is fixedly connected to the output end of an external power source. The bottom ends of two limiting frames 507 are threadedly connected to the two ends of the bidirectional threaded rod 509, allowing adjustment of the distance between the two limiting frames 507. The bidirectional threaded rod 509 adopts a forward and reverse thread structure. When the power source drives it to rotate, the two limiting frames 507 move synchronously in opposite directions, achieving adaptive clamping of material bags of different widths, preventing lateral displacement of the material bags during conveying, and improving compatibility. A set of equally spaced ball bearings 510 are rotatably connected to the sides of the two limiting frames 507 that are close to each other, reducing the frictional resistance between the material bag and the limiting frame 507. The rotatably connected ball bearings 510 roll when the material bag contacts, converting sliding friction into rolling friction, maintaining smooth guidance and preventing material bag jamming due to excessive friction.

[0043] An angle unit 7 for adjusting the tilt angle of the conveyor belt 506 is provided between the top of the adjusting frame 508 and the support frame 502. The angle unit 7 includes an angle frame 701. The middle end of the angle frame 701 is fixedly connected to the bottom of the adjusting frame 508. An electric push rod 702 is provided below the left end of the angle frame 701. The output end of the electric push rod 702 is hinged to the left end of the angle frame 701. The bottom end of the electric push rod 702 is hinged to the top left side of the support frame 502. The other end of the angle frame 701 is hinged to the top right side of the support frame 502. The extension and retraction of the electric push rod 702 drives the angle frame 701 to rotate around the hinge point, thereby adjusting the angle between the frame 504 and the support frame 502, so that the angle of one end of the conveyor belt 506 is adjustable to adapt to the feed inlet height requirements of different models of bag cutting machines 6. At the same time, it works with the lifting function of the hydraulic rod 503 to improve the overall applicability.

[0044] The material transfer mechanism 2 includes a base 201, with a robotic arm 202 mounted on the top of the base 201. Material placement platforms 1 are located on both sides of the base 201 for stacking palletized material bags. The robotic arm can automatically grab the palletized material bags and place them at the bottom of the conveyor belt 506. The vision inspection mechanism 3 includes a support rod 301, which is L-shaped. A motor 302 is installed at the top of the support rod 301. The output end of the motor 302 is fixedly connected to a rotating shaft 303 via a coupling. A swing arm 304 is fixedly connected to the top of the rotating shaft 303. An industrial camera module 305 is installed at the other end of the swing arm. The rotating shaft 303 is coaxially arranged with the base 201. The industrial camera module 305 can move in a circular motion with the swing arm 304 to expand the inspection range. Motor 302 drives shaft 303 to rotate, enabling industrial camera to image the material bag from multiple angles. Combined with image recognition algorithm, it obtains the material bag's position, size, and posture information in real time. Guardrails 8 are installed on the opposite sides of the two material placement platforms 1 to regulate the material bag stacking range, prevent personnel from entering the work area, and ensure the continuous and stable operation of the automated production line. PLC control cabinet 4 is installed on the surface of one of the guardrails 8. PLC control cabinet 4 is the core of the automated control system, used to integrate and process visual detection signals, robotic arm path planning, conveyor belt 506 speed adjustment and angle adjustment commands. Through preset programs, it coordinates the collaborative actions of various actuators such as hydraulic rod 503, electric push rod 702, and motor 302 to achieve fully unmanned operation from palletized material bag grabbing, visual positioning, conveying adjustment to bag cutting and feeding.

[0045] The working principle of the above embodiment is as follows: the material bags are neatly stacked on the material placement platform 1 on both sides, the guardrail 8 limits the stacking range to prevent personnel from accidentally entering the work area and ensure the safety of the production line. The PLC control cabinet 4 triggers the robotic arm body 202 of the material transfer mechanism 2, which is installed on the top of the base 201. The robotic arm automatically grabs the stacked material bags according to the preset path and transfers them to the bottom initial feeding position of the conveyor belt 506 of the material feeding mechanism 5. The motor 302 of the vision inspection mechanism 3 is installed on the top of the L-shaped support rod 301 and starts to drive the rotating shaft 303 to rotate, which drives the swing arm 304 and the industrial camera module 305 to perform circular motion. An industrial camera performs a 360° scan of the material bag, acquiring real-time image information such as its position, size, and orientation. The image data is transmitted to the PLC control cabinet 4, where a built-in image recognition algorithm processes the data to determine if the material bag is offset and if its size conforms to the current spacing of the limit frames 507. Based on the material bag size, the PLC control cabinet 4 drives one end of a bidirectional threaded rod 509, connected to a power source, to rotate. The bidirectional threaded rod 509 uses a forward and reverse thread structure, causing the limit frames 507 on both sides to move synchronously in opposite directions, adjusting the spacing to match the width of the material bag and preventing lateral offset. When different bag-cutting machines 6 need to be used, the hydraulic rod 503 extends or retracts, adjusting the overall height of the conveyor belt 506 to match the base height of the bag-cutting machine 6's inlet. The electric actuator 702 extends and retracts, pushing the angle frame 701 to rotate around the hinge point, adjusting the angle between the frame 504 and the support frame 502, so that the tilt angle of the end of the conveyor belt 506 is adapted to the specific height requirements of the feed inlet of the bag cutter 6. When the conveyor belt 506 is guiding, as the bag moves with the conveyor belt 506, the rotating balls 510 on the inner wall of the limit frame 507 on both sides convert sliding friction into rolling friction, significantly reducing frictional resistance and preventing the bag from getting stuck. The bottom of the limit frame 507 is designed to be inclined away from the conveyor belt 506, forming a gradually expanding channel. Under the power drive of the conveyor belt 506, the bag naturally centers towards the middle, eliminating the falling deviation caused by inertia or initial placement offset, and ensuring that it falls accurately into the feed inlet of the bag cutter 6.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic feeding mechanism for a bag-cutting machine, comprising a material placement platform (1), a material transfer mechanism (2), a vision inspection mechanism (3), a PLC control cabinet (4), a material feeding mechanism (5), and a bag-cutting machine (6), characterized in that: The material feeding mechanism (5) includes a base plate (501), a support frame (502) is provided above the base plate (501), a hydraulic rod (503) is fixedly connected to the upper surface of the base plate (501), the output end of the hydraulic rod (503) is fixedly connected to the bottom end of the support frame (502), a frame (504) is provided above the support frame (502), a transmission roller (505) is rotatably connected between the front and rear inner sidewalls of the left and right ends of the frame (504), a conveyor belt (506) is provided between the two transmission rollers (505), and the two transmission rollers (505) are connected by transmission through the conveyor belt (506). Two limiting frames (507) are slidably connected to the outer surface of the conveyor belt (506), and the bottom ends of the two limiting frames (507) are inclined in a direction away from the conveyor belt (506). An adjustment frame (508) is provided below the frame (504). The front and rear ends of the adjustment frame (508) are fixedly connected to the front and back of the frame (504). A bidirectional threaded rod (509) is provided between the adjustment frames (508). The bottom ends of the two limiting frames (507) are respectively threaded to the two ends of the bidirectional threaded rod (509). An angle unit (7) for adjusting the tilt angle of the conveyor belt (506) is provided between the top of the adjusting frame (508) and the support frame (502).

2. The automatic feeding mechanism for a bag-cutting machine according to claim 1, characterized in that: Each of the two limiting frames (507) has a set of equally spaced balls (510) rotatably connected to the side of each other.

3. The automatic feeding mechanism for a bag-cutting machine according to claim 1, characterized in that: The angle unit (7) includes an angle frame (701), the middle end of which is fixedly connected to the bottom of the adjustment frame (508). An electric push rod (702) is provided below the left end of the angle frame (701). The output end of the electric push rod (702) is hinged to the left end of the angle frame (701). The bottom end of the electric push rod (702) is hinged to the top left side of the support frame (502). The other end of the angle frame (701) is hinged to the top right side of the support frame (502).

4. The automatic feeding mechanism for a bag-cutting machine according to claim 1, characterized in that: The material transfer mechanism (2) includes a base (201), a robotic arm body (202) is installed on the top of the base (201), and the material placement platform (1) is located on both sides of the base (201).

5. An automatic feeding mechanism for a bag-cutting machine according to claim 1 or 4, characterized in that: The visual inspection mechanism (3) includes a support rod (301), which is L-shaped. A motor (302) is provided at the top of the support rod (301). The output end of the motor (302) is fixedly connected to a rotating shaft (303) via a coupling. A swing arm (304) is fixedly connected to the top of the rotating shaft (303). An industrial camera module (305) is provided at the other end of the swing arm. The rotating shaft (303) is coaxially arranged with the base (201).

6. The automatic feeding mechanism for a bag-cutting machine according to claim 4, characterized in that: The two material placement platforms (1) are each equipped with guardrails (8) on the side that is far apart from each other.

7. The automatic feeding mechanism for a bag-cutting machine according to claim 6, characterized in that: The PLC control cabinet (4) is installed on the surface of one of the guardrails (8).

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