Raw material sorting device for bamboo stick processing and forming

Abstract

The invention relates to the technical field of sorting, in particular to a raw material sorting device for bamboo stick processing and forming, which comprises a rack which is divided into a rack I and a rack II, a partition plate is fixedly connected in the rack II and is used for dividing the rack II into two cavities, a limiting seat I and a limiting seat II are fixedly connected in the rack I, and the limiting seat I and the limiting seat II are fixedly connected in the rack II. The upper side of the first limiting seat is slidably connected with an upper distance measuring block, the lower side of the second limiting seat is slidably connected with a lower distance measuring block, and first pressure springs symmetrically distributed along the lower distance measuring block are fixedly connected between the lower distance measuring block and the second limiting seat. By arranging the floatable upper distance measuring block and the floatable lower distance measuring block on the upper side and the lower side of the limiting base respectively and combining the first pressure spring and the gravity reset mechanism, the visual sensor can automatically adjust the detection distance along with the thickness change of the bamboo stick, and the detection distance is always kept within the optimal imaging focal length range; the technical problems of image blurring, recognition misalignment and the like caused by uneven taper of the bamboo stick are effectively solved, and the precision and stability of wormhole detection are greatly improved.

Description

Technical Field

[0001] This invention relates to the technical field of sorting, and more particularly to a raw material sorting device for bamboo skewer processing and shaping. Background Technology

[0002] During bamboo skewer production, raw bamboo often has surface defects such as insect holes and cracks due to natural growth or pests. If such defective bamboo is not removed and directly enters subsequent processing stages, it will not only affect the appearance and strength of the finished product, but may also cause hygiene and safety issues in applications such as food packaging. Therefore, efficient and accurate sorting of raw bamboo skewer materials is crucial.

[0003] In existing technologies, manual visual screening or simple photoelectric detection equipment are mostly used. Manual screening is inefficient, highly subjective, and prone to fatigue and missed detections. Traditional photoelectric or visual detection devices usually fix the sensor on one side, which can only acquire images of a local surface of the bamboo segment. Many insect holes cannot be captured because they face the shaded side or are in blind spots. Furthermore, they cannot adapt to the conical structure of bamboo sticks that are generally thick at one end and thin at the other. When the diameter of the bamboo stick changes, the distance between the fixed sensor and the surface of the bamboo stick changes accordingly, which can easily exceed the depth of field, resulting in blurred images, loss of features, and thus misjudgment or missed detection.

[0004] Therefore, there is an urgent need for a raw material sorting device for bamboo skewer processing that can dynamically adapt to changes in the thickness of bamboo skewers and achieve 360-degree detection without blind spots, in order to solve the problem of insufficient sorting accuracy caused by the fixed position of the sensors. Summary of the Invention

[0005] In order to overcome the shortcomings of insufficient sorting accuracy caused by fixed sensor positions, the present invention provides a raw material sorting device for bamboo stick processing and forming.

[0006] A raw material sorting device for bamboo skewer processing includes a frame, divided into a frame one and a frame two. A partition is fixedly connected inside the frame two to divide it into two chambers. Limiting seats one and two are fixedly connected inside the frame one. An upper measuring block is slidably connected to the upper side of the limiting seat one, and a lower measuring block is slidably connected to the lower side of the limiting seat two. A compression spring symmetrically distributed along the lower measuring block is fixedly connected between the lower measuring block and the limiting seat two. Visual sensors are fixedly connected to both the limiting seat one and the limiting seat two. A rotating shaft is rotatably connected between the frame one and the frame two. A sorting plate is fixedly connected to the side of the rotating shaft near the partition. A cylinder is fixedly connected to the partition, and the telescopic shaft of the cylinder is rotatably connected to one side of the sorting plate. A conveying mechanism for conveying bamboo skewers one by one is provided on the frame.

[0007] Optionally, the vision sensor is electrically connected to the cylinder via a control module.

[0008] Optionally, the conveying mechanism includes multiple long conveying rollers rotatably mounted on the mounting block, a motor connected to the long conveying rollers via a pulley assembly, the mounting block being slidably connected within the frame two, and a compression spring two being fixedly connected between the mounting block and the frame two.

[0009] Optionally, the second frame is provided with a plurality of tension adjustment components to maintain the tension of the pulley assembly.

[0010] Optionally, the conveying mechanism further includes multiple rotating rods, which are fixed to the rotating shaft on the side near the frame one. Multiple sets of fixed seats are fixed inside the frame one. A lifting frame is slidably connected between each set of fixed seats. A set of sliders is slidably connected on the lifting frame. Short conveying rollers are rotatably connected between each set of fixed seats and between each set of sliders. A compression spring is fixed between the slider and the adjacent lifting frame.

[0011] Optionally, the upper short conveyor roller is connected to a gear via a universal joint, which is rotatably connected to the lifting frame. The lower short conveyor roller is directly fixed to a gear, with adjacent gears meshing with each other. The motor is connected to the upper gear via a transmission assembly.

[0012] Optionally, a plurality of bearing seats are fixedly connected inside the frame, and a worm gear is rotatably connected inside the bearing seats. A cleaning ring for cleaning the outer surface of the bamboo skewers is fixedly connected inside the worm gear.

[0013] Optionally, a worm gear is fixedly connected to the bearing housing, the worm gear meshes with an adjacent turbine, and the worm gear is connected to a transmission assembly.

[0014] Optionally, a sprayer is fixedly connected to the frame, and nozzles are fixedly connected to the upper side of the first limiting seat and the lower side of the second limiting seat. The nozzles are connected to the sprayer through a delivery pipe.

[0015] Compared with the prior art, the present invention has the following advantages: First, by setting floating upper and lower measuring blocks on the upper and lower sides of the limiting seat respectively, and combining the compression spring and gravity reset mechanism, the vision sensor can automatically adjust the detection distance according to the thickness of the bamboo stick, and always keep it within the optimal imaging focal length range. This effectively solves the technical problems such as image blurring and inaccurate recognition caused by uneven bamboo stick taper, and greatly improves the accuracy and stability of insect hole detection.

[0016] Secondly, the dual-vision sensor layout, which is positioned vertically and horizontally, combined with the design of the bamboo skewer passing through the air, enables 360-degree full coverage detection of the circumference of the bamboo skewer. This completely eliminates the visual blind spots present in traditional single-sided or partial detection, ensuring that defects such as wormholes and cracks in any direction can be captured in a timely manner.

[0017] Third, when the sorting action is triggered, the power transmission of the short conveyor roller is automatically cut off by the linkage mechanism of the rotating rod and lifting frame, and the roller is removed from the bamboo stick. This achieves the rhythm control of "one inspection, one sorting, and one stop", which avoids multiple bamboo sticks entering the sorting area at the same time and reduces the risk of missorting. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0020] Figure 3 This is a three-dimensional structural cross-sectional view of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the frame, partition, and limiting seat of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the limiting seat one, limiting seat two, and vision sensor components of the present invention.

[0023] Figure 6 This is a three-dimensional structural diagram of the sorting plate of the present invention.

[0024] Figure 7 This is a three-dimensional structural diagram of the frame, long conveyor roller, and compression spring of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the components of the present invention, such as the rotating rod, the fixed seat, and the lifting frame.

[0026] Figure 9 This is a three-dimensional structural diagram of the components of the present invention, including the fixed base, lifting frame, and short conveying roller.

[0027] Figure 10 This is a three-dimensional structural diagram of the lifting frame of the present invention.

[0028] Figure 11 This is a three-dimensional structural diagram of the frame one, frame two, and bearing seats of the present invention.

[0029] Figure 12 This is a three-dimensional structural diagram of the worm gear, worm wheel, and cleaning ring components of the present invention.

[0030] Figure 13 This is a three-dimensional structural diagram of the frame, sprayer, and nozzle components of the present invention.

[0031] Figure 14 This is a three-dimensional structural diagram of the limiting seat 1, limiting seat 2, and nozzle of the present invention.

[0032] The components in the attached diagram are labeled as follows: 101: Frame 1, 102: Frame 2, 103: Partition plate, 104: Limiting seat 1, 1041: Upper measuring block, 105: Limiting seat 2, 1051: Lower measuring block, 1052: Compression spring 1, 106: Vision sensor, 107: Sorting plate, 108: Cylinder, 109: Rotating shaft, 201: Long conveying roller, 202: Compression spring 2, 301: Rotating rod, 302: Fixed seat, 303: Lifting frame, 304: Short conveying roller, 305: Slider, 306: Compression spring 3, 401: Bearing seat, 402: Worm gear, 403: Cleaning ring, 501: Sprayer, 502: Nozzle. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the directional terms such as up, down, left, right, front, back, inside, and outside used in this text are based solely on the accompanying drawings and are not intended to specifically limit the invention.

[0034] Example 1: This invention provides a raw material sorting device for bamboo skewer processing, aiming to solve the technical problems of low sorting efficiency, high misjudgment rate, and high labor costs caused by uneven thickness and difficulty in efficiently and accurately identifying surface wormholes in existing bamboo skewer raw material sorting processes. The technical solution of this invention will be described in detail below with reference to the accompanying drawings and specific structures.

[0035] Combined with appendix Figure 1 To be continued Figure 6 The device comprises a frame consisting of a first frame 101 and a second frame 102, which are fixedly connected to each other, forming a continuous working channel. A vertically installed partition 103 is fixed inside the second frame 102, dividing its interior into a front chamber and a rear chamber for collecting substandard and qualified bamboo skewer raw materials, respectively. Limiting seats 104 and 105 are fixedly installed inside the first frame 101, arranged sequentially along the bamboo skewer conveying direction, with the bamboo skewers passing between them. An upper measuring block 1041 is slidably connected to the upper side of the first limiting seat 104, and a lower measuring block 1051 is slidably connected to the lower side of the second limiting seat 105. Among them, a compression spring 1052 is fixed between the lower measuring block 1051 and the limiting seat 105, which is symmetrically distributed along the front and back of the lower measuring block 1051. This allows the lower measuring block 1051 to return to its upward position by the elastic force of the compression spring 1052 when no external force is applied. The upper measuring block 1041 returns to its downward position mainly by its own weight. During the bamboo skewer's movement, the upper measuring block 1041 and the lower measuring block 1051 can automatically float up and down with the change in the local diameter of the bamboo skewer, always maintaining appropriate contact with the surface of the bamboo skewer without applying excessive pressure.

[0036] High-precision vision sensors 106 are fixedly mounted on limiting seat 104 and limiting seat 2 105 respectively, for real-time image acquisition of the upper and lower surfaces of the bamboo stick. Since the bamboo stick passes through limiting seat 104 and limiting seat 2 105 in a suspended state during the conveying process, and vision sensors 106 are provided on both the upper and lower sides, 360-degree coverage detection of the circumference of the bamboo stick can be achieved, effectively avoiding the blind spot problem of traditional single-sided detection.

[0037] In the aforementioned detection and sorting process, since bamboo skewers are not necessarily of uniform thickness, but are generally thicker at one end and thinner at the other, with a smooth transition from thin to thick in the middle, the thickness of the bamboo material may be dynamically changing. If the vision sensor 106 remains fixed and cannot adapt its position dynamically, it may cause blurred images due to excessively close distances or insufficient resolution due to excessively large distances, leading to problems such as inaccurate detection, missed detections, or misjudgments. To address this, the present invention achieves dynamic adjustment of the vision sensor 106 through the following specific operation: When the bamboo skewer passes through the first limiting seat 104 and the second limiting seat 105 in sequence, it will successively contact the upper measuring block 1041 and the lower measuring block 1051. During the process of conveying the bamboo skewer to the right, the upper measuring block 1041 and the lower measuring block 1051 will move upward and downward respectively to adapt to the thickness of the bamboo skewer. The upper measuring block 1041 uses its own gravity to reset and adjust downward, while the lower measuring block 1051 uses the elastic force of the compression spring 1052 to reset and adjust upward. In this way, the displacement of the upper measuring block 1041 and the lower measuring block 1051 dynamically reflects the change in diameter of the current cross section of the bamboo stick in real time, and drives the visual sensor 106 rigidly connected to it to adjust its position synchronously. That is, the position of the visual sensor 106 is automatically and dynamically adjusted by using the thickness of the bamboo stick itself, so that the visual sensor 106 always maintains the optimal working distance with the surface of the bamboo stick, ensuring clear imaging and distinct features, thereby significantly improving the recognition accuracy of surface defects such as insect holes.

[0038] When the vision sensor 106 detects wormholes, cracks, or other surface defects, it immediately sends a corresponding electrical signal; if no defect is detected, it sends a normal signal. All of these signals are transmitted to the control module, which controls the cylinder 108 to operate according to the signal type.

[0039] Specifically, a rotating shaft 109 is rotatably connected between frame 101 and frame 102. A sorting plate 107 is fixedly connected to the side of the rotating shaft 109 near the partition 103. A cylinder 108 is fixedly connected to the partition 103, and the end of the telescopic shaft of the cylinder 108 is rotatably connected to one side of the sorting plate 107 via a pin. When the control module receives a "wormhole present" signal, it controls the cylinder 108 to shorten, pushing the sorting plate 107 to swing counterclockwise around the rotating shaft 109, causing its front end to tilt downwards and guiding the defective bamboo sticks into the front chamber. Conversely, when a "no defect" signal is received, it controls the cylinder 108 to extend, causing the sorting plate 107 to swing clockwise until its rear end tilts downwards, guiding the qualified bamboo sticks into the rear chamber. In this way, a fully automatic and high-precision sorting operation is achieved.

[0040] Combined with appendix Figure 7 To be continued Figure 10 To ensure stable feeding of each bamboo skewer, a specially designed conveying mechanism is installed on the frame. This mechanism includes two long conveying rollers 201 rotatably mounted on mounting blocks, with a motor driving the rollers 201 to rotate via a pulley assembly. Each mounting block is slidably connected inside the second frame 102 and connected to the frame 102 via a compression spring 202. This allows the long conveying rollers 201 to float up and down according to the thickness of the bamboo skewers during feeding, maintaining a constant clamping force and preventing slippage or jamming due to the tapered shape of the bamboo skewers. Simultaneously, the second frame 102 is equipped with two tension adjustment components for dynamically adjusting the belt tension in the pulley assembly, ensuring smooth and reliable transmission.

[0041] In addition, the conveying mechanism includes two rotating rods 301, which are fixed to the side of the rotating shaft 109 near the frame 101. Two sets of fixed seats 302 are fixedly connected inside the frame 101. A lifting frame 303 is slidably connected between each set of fixed seats 302 in the vertical direction. A set of sliders 305 is slidably connected to the lifting frame 303 in the vertical direction. Short conveying rollers 304 are rotatably connected between each set of fixed seats 302 and between each set of sliders 305, forming an opposing clamping structure. A compression spring 306 is fixedly connected between the slider 305 and the adjacent lifting frame 303, giving the short conveying rollers 304 adaptive floating capability. The upper short conveying roller 304 is connected to a gear via a universal joint, which is rotatably connected to the lifting frame 303; the lower short conveying roller 304 is directly fixed to a gear, with adjacent gears meshing with each other. A motor is connected to the upper gear via a transmission assembly, thereby driving the entire set of short conveying rollers 304 to rotate synchronously.

[0042] Under normal conveying conditions, bamboo skewers enter from the left side of frame 101, pass through the gaps between the short conveyor rollers 304 in sequence, and then enter frame 2 102, exiting between the long conveyor roller 201 and the sorting plate 107. After the motor starts, the long conveyor roller 201 and the short conveyor rollers 304 rotate synchronously through the belt assembly and transmission assembly, realizing the continuous rightward conveying of bamboo skewers. During this process, the long conveyor roller 201 and the upper short conveyor roller 304 can automatically move up and down according to the diameter of the bamboo skewers, and the compression springs 202 and 306 compress or rebound accordingly to ensure moderate clamping force and smooth conveying.

[0043] Crucially, during the sorting process, the rotating shaft 109 rotates due to the drive of the cylinder 108, causing the rotating rod 301 to rotate synchronously. The rotating rod 301 pushes the lifting frame 303 upward, causing it to slide upward along the fixed base 302. This, in turn, drives the slider 305 upward via the compression spring 306, disengaging the upper short conveyor roller 304 from the bamboo skewer. Simultaneously, the gear on the upper short conveyor roller 304 moves upward, disengaging from the transmission assembly and disengaging from the lower gear. This results in both the upper and lower short conveyor rollers 304 losing power input, thus pausing the conveying of the next bamboo skewer. This design cleverly achieves cycle control of "detection-sorting-pause-reset," preventing interference caused by multiple bamboo skewers entering the sorting area simultaneously and significantly improving sorting accuracy.

[0044] Example 2: Based on Example 1, combined with Appendix Figure 11 To be continued Figure 12 To further improve detection accuracy, two bearing seats 401 are fixedly installed inside the frame 101. Each bearing seat 401 has a worm gear 402 rotatably connected within it, and a cleaning ring 403 for cleaning the outer surface of the bamboo skewers is fixedly installed inside the worm gear 402. A worm is also fixedly installed on the bearing seat 401, meshing with the adjacent worm gear 402. The worm is linked to the motor via a transmission assembly. When the motor starts, power is transmitted to the worm via the transmission assembly, driving the worm gear 402 and the cleaning ring 403 to rotate at high speed. The inner wall of the cleaning ring 403 has a flexible abrasive layer, which gently polishes the surface of the bamboo skewers as they pass through, effectively removing burrs, dust, and attached impurities. This prevents dirt from obscuring insect holes and causing misjudgments, while also improving the surface smoothness of the bamboo skewers, laying the foundation for subsequent processing.

[0045] Combined with appendix Figure 13 To be continued Figure 14In addition, a sprayer 501 is fixedly connected to the frame 101, and nozzles 502 are fixedly connected to the upper side of the limiting seat 104 and the lower side of the limiting seat 105. The nozzles 502 are connected to the sprayer 501 through a delivery pipe. When the vision sensor 106 detects an insect hole and sends a signal, the control module, in addition to controlling the cylinder 108, will also simultaneously start the sprayer 501, causing the nozzles 502 to spray identifiable marking pigment (such as red water-based dye) onto the surface of the bamboo sticks. This marking facilitates the rapid identification of non-conforming products during subsequent manual inspection or warehousing classification, forming a dual protection mechanism.

[0046] In summary, this device achieves automated conveying of bamboo skewer raw materials, surface cleaning, 360-degree detection of insect holes without blind spots, dynamic position self-adaptation, precise sorting, and defect marking through the deep integration of mechanical structure and intelligent sensing. The entire process requires no manual intervention, and the sorting efficiency, accuracy, and adaptability are high, making it particularly suitable for large-scale bamboo skewer production enterprises.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A raw material sorting device for bamboo skewer processing and forming, comprising a frame, divided into a frame one (101) and a frame two (102), wherein a partition (103) is fixedly connected inside the frame two (102) to divide the frame two (102) into two chambers, characterized in that: The frame one (101) is fixedly connected to a limiting seat one (104) and a limiting seat two (105). The upper side of the limiting seat one (104) is slidably connected to an upper measuring block (1041), and the lower side of the limiting seat two (105) is slidably connected to a lower measuring block (1051). A compression spring one (1052) is fixedly connected between the lower measuring block (1051) and the limiting seat two (105) and is symmetrically distributed along the lower measuring block (1051). The limiting seat one (104) and the limiting seat two (105) are fixedly connected to each other. A vision sensor (106) is fixedly attached to each of the two seats (105). A rotating shaft (109) is rotatably connected between the first frame (101) and the second frame (102). A sorting plate (107) is fixedly attached to the side of the rotating shaft (109) near the partition (103). A cylinder (108) is fixedly attached to the partition (103). The telescopic shaft of the cylinder (108) is rotatably connected to one side of the sorting plate (107). A conveying mechanism for conveying bamboo sticks one by one is provided on the frame.

2. The raw material sorting device for bamboo skewer processing and shaping according to claim 1, characterized in that: The vision sensor (106) is electrically connected to the cylinder (108) through the control module.

3. A raw material sorting device for bamboo skewer processing and shaping according to claim 2, characterized in that: The conveying mechanism includes multiple long conveying rollers (201) rotatably mounted on the mounting block. The motor is connected to the long conveying rollers (201) via a pulley assembly. The mounting block is slidably connected to the frame two (102). A compression spring two (202) is fixed between the mounting block and the frame two (102).

4. A raw material sorting device for bamboo skewer processing and shaping according to claim 3, characterized in that: The frame 2 (102) is provided with multiple tension adjustment components to maintain the tension of the pulley assembly.

5. A raw material sorting device for bamboo skewer processing and shaping according to claim 4, characterized in that: The conveying mechanism also includes multiple rotating rods (301), which are fixed to the rotating shaft (109) on the side near the frame (101). Multiple sets of fixed seats (302) are fixed inside the frame (101). A lifting frame (303) is slidably connected between each set of fixed seats (302). A set of sliders (305) is slidably connected on the lifting frame (303). Short conveying rollers (304) are rotatably connected between each set of fixed seats (302) and between each set of sliders (305). A compression spring (306) is fixed between the slider (305) and the adjacent lifting frame (303).

6. A raw material sorting device for bamboo skewer processing and shaping according to claim 5, characterized in that: The upper short conveyor roller (304) is connected to a gear via a universal joint, which is rotatably connected to the lifting frame (303). The lower short conveyor roller (304) is directly fixed to a gear, with adjacent gears meshing with each other. The motor is connected to the upper gear via a transmission assembly.

7. A raw material sorting device for bamboo skewer processing and shaping according to claim 6, characterized in that: Multiple bearing seats (401) are fixedly connected inside the frame (101), and a worm gear (402) is rotatably connected inside the bearing seat (401). A cleaning ring (403) for cleaning the outer surface of the bamboo sticks is fixedly connected inside the worm gear (402).

8. A raw material sorting device for bamboo skewer processing and shaping according to claim 7, characterized in that: A worm gear is fixedly connected to the bearing housing (401), the worm gear meshes with an adjacent turbine, and the worm gear is connected to the transmission assembly.

9. A raw material sorting device for bamboo skewer processing and shaping according to claim 8, characterized in that: A sprayer (501) is fixedly connected to the frame one (101), and a nozzle (502) is fixedly connected to the upper side of the limiting seat one (104) and the lower side of the limiting seat two (105). The nozzle (502) is connected to the sprayer (501) through a delivery pipe.

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